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{"version":3,"file":"video-lazy.min.js","sources":["../src/video-lazy.js"],"sourcesContent":["/**\n * @license\n * Video.js 8.3.0 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/main/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/main/LICENSE>\n */\n\n(function (global, factory) {\n typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n typeof define === 'function' && define.amd ? define(factory) :\n (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.videojs = factory());\n})(this, (function () { 'use strict';\n\n var version$5 = \"8.3.0\";\n\n /**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n *\n * @private\n */\n const hooks_ = {};\n\n /**\n * Get a list of hooks for a specific lifecycle\n *\n * @param {string} type\n * the lifecycle to get hooks from\n *\n * @param {Function|Function[]} [fn]\n * Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n * an array of hooks, or an empty array if there are none.\n */\n const hooks = function (type, fn) {\n hooks_[type] = hooks_[type] || [];\n if (fn) {\n hooks_[type] = hooks_[type].concat(fn);\n }\n return hooks_[type];\n };\n\n /**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n * the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n * The function or array of functions to attach.\n */\n const hook = function (type, fn) {\n hooks(type, fn);\n };\n\n /**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param {string} type\n * the lifecycle that the function hooked to\n *\n * @param {Function} fn\n * The hooked function to remove\n *\n * @return {boolean}\n * The function that was removed or undef\n */\n const removeHook = function (type, fn) {\n const index = hooks(type).indexOf(fn);\n if (index <= -1) {\n return false;\n }\n hooks_[type] = hooks_[type].slice();\n hooks_[type].splice(index, 1);\n return true;\n };\n\n /**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n * the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n * The function or array of functions to attach.\n */\n const hookOnce = function (type, fn) {\n hooks(type, [].concat(fn).map(original => {\n const wrapper = (...args) => {\n removeHook(type, wrapper);\n return original(...args);\n };\n return wrapper;\n }));\n };\n\n /**\n * @file fullscreen-api.js\n * @module fullscreen-api\n */\n\n /**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\n const FullscreenApi = {\n prefixed: true\n };\n\n // browser API methods\n const apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror', 'fullscreen'],\n // WebKit\n ['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror', '-webkit-full-screen'],\n // Mozilla\n ['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror', '-moz-full-screen'],\n // Microsoft\n ['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError', '-ms-fullscreen']];\n const specApi = apiMap[0];\n let browserApi;\n\n // determine the supported set of functions\n for (let i = 0; i < apiMap.length; i++) {\n // check for exitFullscreen function\n if (apiMap[i][1] in document) {\n browserApi = apiMap[i];\n break;\n }\n }\n\n // map the browser API names to the spec API names\n if (browserApi) {\n for (let i = 0; i < browserApi.length; i++) {\n FullscreenApi[specApi[i]] = browserApi[i];\n }\n FullscreenApi.prefixed = browserApi[0] !== specApi[0];\n }\n\n /**\n * @file create-logger.js\n * @module create-logger\n */\n\n // This is the private tracking variable for the logging history.\n let history = [];\n\n /**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param {string} type\n * The name of the console method to use.\n *\n * @param {Array} args\n * The arguments to be passed to the matching console method.\n */\n const LogByTypeFactory = (name, log) => (type, level, args) => {\n const lvl = log.levels[level];\n const lvlRegExp = new RegExp(`^(${lvl})$`);\n if (type !== 'log') {\n // Add the type to the front of the message when it's not \"log\".\n args.unshift(type.toUpperCase() + ':');\n }\n\n // Add console prefix after adding to history.\n args.unshift(name + ':');\n\n // Add a clone of the args at this point to history.\n if (history) {\n history.push([].concat(args));\n\n // only store 1000 history entries\n const splice = history.length - 1000;\n history.splice(0, splice > 0 ? splice : 0);\n }\n\n // If there's no console then don't try to output messages, but they will\n // still be stored in history.\n if (!window.console) {\n return;\n }\n\n // Was setting these once outside of this function, but containing them\n // in the function makes it easier to test cases where console doesn't exist\n // when the module is executed.\n let fn = window.console[type];\n if (!fn && type === 'debug') {\n // Certain browsers don't have support for console.debug. For those, we\n // should default to the closest comparable log.\n fn = window.console.info || window.console.log;\n }\n\n // Bail out if there's no console or if this type is not allowed by the\n // current logging level.\n if (!fn || !lvl || !lvlRegExp.test(type)) {\n return;\n }\n fn[Array.isArray(args) ? 'apply' : 'call'](window.console, args);\n };\n function createLogger$1(name) {\n // This is the private tracking variable for logging level.\n let level = 'info';\n\n // the curried logByType bound to the specific log and history\n let logByType;\n\n /**\n * Logs plain debug messages. Similar to `console.log`.\n *\n * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n * of our JSDoc template, we cannot properly document this as both a function\n * and a namespace, so its function signature is documented here.\n *\n * #### Arguments\n * ##### *args\n * *[]\n *\n * Any combination of values that could be passed to `console.log()`.\n *\n * #### Return Value\n *\n * `undefined`\n *\n * @namespace\n * @param {...*} args\n * One or more messages or objects that should be logged.\n */\n const log = function (...args) {\n logByType('log', level, args);\n };\n\n // This is the logByType helper that the logging methods below use\n logByType = LogByTypeFactory(name, log);\n\n /**\n * Create a new sublogger which chains the old name to the new name.\n *\n * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n * ```js\n * mylogger('foo');\n * // > VIDEOJS: player: foo\n * ```\n *\n * @param {string} name\n * The name to add call the new logger\n * @return {Object}\n */\n log.createLogger = subname => createLogger$1(name + ': ' + subname);\n\n /**\n * Enumeration of available logging levels, where the keys are the level names\n * and the values are `|`-separated strings containing logging methods allowed\n * in that logging level. These strings are used to create a regular expression\n * matching the function name being called.\n *\n * Levels provided by Video.js are:\n *\n * - `off`: Matches no calls. Any value that can be cast to `false` will have\n * this effect. The most restrictive.\n * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n * `log.warn`, and `log.error`).\n * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n * - `warn`: Matches `log.warn` and `log.error` calls.\n * - `error`: Matches only `log.error` calls.\n *\n * @type {Object}\n */\n log.levels = {\n all: 'debug|log|warn|error',\n off: '',\n debug: 'debug|log|warn|error',\n info: 'log|warn|error',\n warn: 'warn|error',\n error: 'error',\n DEFAULT: level\n };\n\n /**\n * Get or set the current logging level.\n *\n * If a string matching a key from {@link module:log.levels} is provided, acts\n * as a setter.\n *\n * @param {string} [lvl]\n * Pass a valid level to set a new logging level.\n *\n * @return {string}\n * The current logging level.\n */\n log.level = lvl => {\n if (typeof lvl === 'string') {\n if (!log.levels.hasOwnProperty(lvl)) {\n throw new Error(`\"${lvl}\" in not a valid log level`);\n }\n level = lvl;\n }\n return level;\n };\n\n /**\n * Returns an array containing everything that has been logged to the history.\n *\n * This array is a shallow clone of the internal history record. However, its\n * contents are _not_ cloned; so, mutating objects inside this array will\n * mutate them in history.\n *\n * @return {Array}\n */\n log.history = () => history ? [].concat(history) : [];\n\n /**\n * Allows you to filter the history by the given logger name\n *\n * @param {string} fname\n * The name to filter by\n *\n * @return {Array}\n * The filtered list to return\n */\n log.history.filter = fname => {\n return (history || []).filter(historyItem => {\n // if the first item in each historyItem includes `fname`, then it's a match\n return new RegExp(`.*${fname}.*`).test(historyItem[0]);\n });\n };\n\n /**\n * Clears the internal history tracking, but does not prevent further history\n * tracking.\n */\n log.history.clear = () => {\n if (history) {\n history.length = 0;\n }\n };\n\n /**\n * Disable history tracking if it is currently enabled.\n */\n log.history.disable = () => {\n if (history !== null) {\n history.length = 0;\n history = null;\n }\n };\n\n /**\n * Enable history tracking if it is currently disabled.\n */\n log.history.enable = () => {\n if (history === null) {\n history = [];\n }\n };\n\n /**\n * Logs error messages. Similar to `console.error`.\n *\n * @param {...*} args\n * One or more messages or objects that should be logged as an error\n */\n log.error = (...args) => logByType('error', level, args);\n\n /**\n * Logs warning messages. Similar to `console.warn`.\n *\n * @param {...*} args\n * One or more messages or objects that should be logged as a warning.\n */\n log.warn = (...args) => logByType('warn', level, args);\n\n /**\n * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n * log if `console.debug` is not available\n *\n * @param {...*} args\n * One or more messages or objects that should be logged as debug.\n */\n log.debug = (...args) => logByType('debug', level, args);\n return log;\n }\n\n /**\n * @file log.js\n * @module log\n */\n const log$1 = createLogger$1('VIDEOJS');\n const createLogger = log$1.createLogger;\n\n /**\n * @file obj.js\n * @module obj\n */\n\n /**\n * @callback obj:EachCallback\n *\n * @param {*} value\n * The current key for the object that is being iterated over.\n *\n * @param {string} key\n * The current key-value for object that is being iterated over\n */\n\n /**\n * @callback obj:ReduceCallback\n *\n * @param {*} accum\n * The value that is accumulating over the reduce loop.\n *\n * @param {*} value\n * The current key for the object that is being iterated over.\n *\n * @param {string} key\n * The current key-value for object that is being iterated over\n *\n * @return {*}\n * The new accumulated value.\n */\n const toString$1 = Object.prototype.toString;\n\n /**\n * Get the keys of an Object\n *\n * @param {Object}\n * The Object to get the keys from\n *\n * @return {string[]}\n * An array of the keys from the object. Returns an empty array if the\n * object passed in was invalid or had no keys.\n *\n * @private\n */\n const keys = function (object) {\n return isObject$1(object) ? Object.keys(object) : [];\n };\n\n /**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n * The object to iterate over\n *\n * @param {obj:EachCallback} fn\n * The callback function which is called for each key in the object.\n */\n function each(object, fn) {\n keys(object).forEach(key => fn(object[key], key));\n }\n\n /**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n * The Object that you want to reduce.\n *\n * @param {Function} fn\n * A callback function which is called for each key in the object. It\n * receives the accumulated value and the per-iteration value and key\n * as arguments.\n *\n * @param {*} [initial = 0]\n * Starting value\n *\n * @return {*}\n * The final accumulated value.\n */\n function reduce(object, fn, initial = 0) {\n return keys(object).reduce((accum, key) => fn(accum, object[key], key), initial);\n }\n\n /**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param {Object} value\n * @return {boolean}\n */\n function isObject$1(value) {\n return !!value && typeof value === 'object';\n }\n\n /**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param {Object} value\n * @return {boolean}\n */\n function isPlain(value) {\n return isObject$1(value) && toString$1.call(value) === '[object Object]' && value.constructor === Object;\n }\n\n /**\n * Merge two objects recursively.\n *\n * Performs a deep merge like\n * {@link https://lodash.com/docs/4.17.10#merge|lodash.merge}, but only merges\n * plain objects (not arrays, elements, or anything else).\n *\n * Non-plain object values will be copied directly from the right-most\n * argument.\n *\n * @param {Object[]} sources\n * One or more objects to merge into a new object.\n *\n * @return {Object}\n * A new object that is the merged result of all sources.\n */\n function merge$2(...sources) {\n const result = {};\n sources.forEach(source => {\n if (!source) {\n return;\n }\n each(source, (value, key) => {\n if (!isPlain(value)) {\n result[key] = value;\n return;\n }\n if (!isPlain(result[key])) {\n result[key] = {};\n }\n result[key] = merge$2(result[key], value);\n });\n });\n return result;\n }\n\n /**\n * Object.defineProperty but \"lazy\", which means that the value is only set after\n * it is retrieved the first time, rather than being set right away.\n *\n * @param {Object} obj the object to set the property on\n * @param {string} key the key for the property to set\n * @param {Function} getValue the function used to get the value when it is needed.\n * @param {boolean} setter whether a setter should be allowed or not\n */\n function defineLazyProperty(obj, key, getValue, setter = true) {\n const set = value => Object.defineProperty(obj, key, {\n value,\n enumerable: true,\n writable: true\n });\n const options = {\n configurable: true,\n enumerable: true,\n get() {\n const value = getValue();\n set(value);\n return value;\n }\n };\n if (setter) {\n options.set = set;\n }\n return Object.defineProperty(obj, key, options);\n }\n\n var Obj = /*#__PURE__*/Object.freeze({\n __proto__: null,\n each: each,\n reduce: reduce,\n isObject: isObject$1,\n isPlain: isPlain,\n merge: merge$2,\n defineLazyProperty: defineLazyProperty\n });\n\n /**\n * @file browser.js\n * @module browser\n */\n\n /**\n * Whether or not this device is an iPod.\n *\n * @static\n * @type {Boolean}\n */\n let IS_IPOD = false;\n\n /**\n * The detected iOS version - or `null`.\n *\n * @static\n * @type {string|null}\n */\n let IOS_VERSION = null;\n\n /**\n * Whether or not this is an Android device.\n *\n * @static\n * @type {Boolean}\n */\n let IS_ANDROID = false;\n\n /**\n * The detected Android version - or `null` if not Android or indeterminable.\n *\n * @static\n * @type {number|string|null}\n */\n let ANDROID_VERSION;\n\n /**\n * Whether or not this is Mozilla Firefox.\n *\n * @static\n * @type {Boolean}\n */\n let IS_FIREFOX = false;\n\n /**\n * Whether or not this is Microsoft Edge.\n *\n * @static\n * @type {Boolean}\n */\n let IS_EDGE = false;\n\n /**\n * Whether or not this is any Chromium Browser\n *\n * @static\n * @type {Boolean}\n */\n let IS_CHROMIUM = false;\n\n /**\n * Whether or not this is any Chromium browser that is not Edge.\n *\n * This will also be `true` for Chrome on iOS, which will have different support\n * as it is actually Safari under the hood.\n *\n * Deprecated, as the behaviour to not match Edge was to prevent Legacy Edge's UA matching.\n * IS_CHROMIUM should be used instead.\n * \"Chromium but not Edge\" could be explicitly tested with IS_CHROMIUM && !IS_EDGE\n *\n * @static\n * @deprecated\n * @type {Boolean}\n */\n let IS_CHROME = false;\n\n /**\n * The detected Chromium version - or `null`.\n *\n * @static\n * @type {number|null}\n */\n let CHROMIUM_VERSION = null;\n\n /**\n * The detected Google Chrome version - or `null`.\n * This has always been the _Chromium_ version, i.e. would return on Chromium Edge.\n * Deprecated, use CHROMIUM_VERSION instead.\n *\n * @static\n * @deprecated\n * @type {number|null}\n */\n let CHROME_VERSION = null;\n\n /**\n * The detected Internet Explorer version - or `null`.\n *\n * @static\n * @deprecated\n * @type {number|null}\n */\n let IE_VERSION = null;\n\n /**\n * Whether or not this is desktop Safari.\n *\n * @static\n * @type {Boolean}\n */\n let IS_SAFARI = false;\n\n /**\n * Whether or not this is a Windows machine.\n *\n * @static\n * @type {Boolean}\n */\n let IS_WINDOWS = false;\n\n /**\n * Whether or not this device is an iPad.\n *\n * @static\n * @type {Boolean}\n */\n let IS_IPAD = false;\n\n /**\n * Whether or not this device is an iPhone.\n *\n * @static\n * @type {Boolean}\n */\n // The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n // to identify iPhones, we need to exclude iPads.\n // http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\n let IS_IPHONE = false;\n\n /**\n * Whether or not this device is touch-enabled.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n const TOUCH_ENABLED = Boolean(isReal() && ('ontouchstart' in window || window.navigator.maxTouchPoints || window.DocumentTouch && window.document instanceof window.DocumentTouch));\n const UAD = window.navigator && window.navigator.userAgentData;\n if (UAD) {\n // If userAgentData is present, use it instead of userAgent to avoid warnings\n // Currently only implemented on Chromium\n // userAgentData does not expose Android version, so ANDROID_VERSION remains `null`\n\n IS_ANDROID = UAD.platform === 'Android';\n IS_EDGE = Boolean(UAD.brands.find(b => b.brand === 'Microsoft Edge'));\n IS_CHROMIUM = Boolean(UAD.brands.find(b => b.brand === 'Chromium'));\n IS_CHROME = !IS_EDGE && IS_CHROMIUM;\n CHROMIUM_VERSION = CHROME_VERSION = (UAD.brands.find(b => b.brand === 'Chromium') || {}).version || null;\n IS_WINDOWS = UAD.platform === 'Windows';\n }\n\n // If the browser is not Chromium, either userAgentData is not present which could be an old Chromium browser,\n // or it's a browser that has added userAgentData since that we don't have tests for yet. In either case,\n // the checks need to be made agiainst the regular userAgent string.\n if (!IS_CHROMIUM) {\n const USER_AGENT = window.navigator && window.navigator.userAgent || '';\n IS_IPOD = /iPod/i.test(USER_AGENT);\n IOS_VERSION = function () {\n const match = USER_AGENT.match(/OS (\\d+)_/i);\n if (match && match[1]) {\n return match[1];\n }\n return null;\n }();\n IS_ANDROID = /Android/i.test(USER_AGENT);\n ANDROID_VERSION = function () {\n // This matches Android Major.Minor.Patch versions\n // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n const match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n if (!match) {\n return null;\n }\n const major = match[1] && parseFloat(match[1]);\n const minor = match[2] && parseFloat(match[2]);\n if (major && minor) {\n return parseFloat(match[1] + '.' + match[2]);\n } else if (major) {\n return major;\n }\n return null;\n }();\n IS_FIREFOX = /Firefox/i.test(USER_AGENT);\n IS_EDGE = /Edg/i.test(USER_AGENT);\n IS_CHROMIUM = /Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT);\n IS_CHROME = !IS_EDGE && IS_CHROMIUM;\n CHROMIUM_VERSION = CHROME_VERSION = function () {\n const match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n if (match && match[2]) {\n return parseFloat(match[2]);\n }\n return null;\n }();\n IE_VERSION = function () {\n const result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n let version = result && parseFloat(result[1]);\n if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n // IE 11 has a different user agent string than other IE versions\n version = 11.0;\n }\n return version;\n }();\n IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\n IS_WINDOWS = /Windows/i.test(USER_AGENT);\n IS_IPAD = /iPad/i.test(USER_AGENT) || IS_SAFARI && TOUCH_ENABLED && !/iPhone/i.test(USER_AGENT);\n IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\n }\n\n /**\n * Whether or not this is an iOS device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n const IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n\n /**\n * Whether or not this is any flavor of Safari - including iOS.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n const IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n\n var browser = /*#__PURE__*/Object.freeze({\n __proto__: null,\n get IS_IPOD () { return IS_IPOD; },\n get IOS_VERSION () { return IOS_VERSION; },\n get IS_ANDROID () { return IS_ANDROID; },\n get ANDROID_VERSION () { return ANDROID_VERSION; },\n get IS_FIREFOX () { return IS_FIREFOX; },\n get IS_EDGE () { return IS_EDGE; },\n get IS_CHROMIUM () { return IS_CHROMIUM; },\n get IS_CHROME () { return IS_CHROME; },\n get CHROMIUM_VERSION () { return CHROMIUM_VERSION; },\n get CHROME_VERSION () { return CHROME_VERSION; },\n get IE_VERSION () { return IE_VERSION; },\n get IS_SAFARI () { return IS_SAFARI; },\n get IS_WINDOWS () { return IS_WINDOWS; },\n get IS_IPAD () { return IS_IPAD; },\n get IS_IPHONE () { return IS_IPHONE; },\n TOUCH_ENABLED: TOUCH_ENABLED,\n IS_IOS: IS_IOS,\n IS_ANY_SAFARI: IS_ANY_SAFARI\n });\n\n /**\n * @file dom.js\n * @module dom\n */\n\n /**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @private\n * @param {string} str\n * The string to check\n *\n * @return {boolean}\n * Will be `true` if the string is non-blank, `false` otherwise.\n *\n */\n function isNonBlankString(str) {\n // we use str.trim as it will trim any whitespace characters\n // from the front or back of non-whitespace characters. aka\n // Any string that contains non-whitespace characters will\n // still contain them after `trim` but whitespace only strings\n // will have a length of 0, failing this check.\n return typeof str === 'string' && Boolean(str.trim());\n }\n\n /**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @private\n * @param {string} str\n * The string to check for whitespace.\n *\n * @throws {Error}\n * Throws an error if there is whitespace in the string.\n */\n function throwIfWhitespace(str) {\n // str.indexOf instead of regex because str.indexOf is faster performance wise.\n if (str.indexOf(' ') >= 0) {\n throw new Error('class has illegal whitespace characters');\n }\n }\n\n /**\n * Whether the current DOM interface appears to be real (i.e. not simulated).\n *\n * @return {boolean}\n * Will be `true` if the DOM appears to be real, `false` otherwise.\n */\n function isReal() {\n // Both document and window will never be undefined thanks to `global`.\n return document === window.document;\n }\n\n /**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param {*} value\n * The value to check.\n *\n * @return {boolean}\n * Will be `true` if the value is a DOM element, `false` otherwise.\n */\n function isEl(value) {\n return isObject$1(value) && value.nodeType === 1;\n }\n\n /**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n * Will be `true` if the DOM is embedded in an iframe, `false`\n * otherwise.\n */\n function isInFrame() {\n // We need a try/catch here because Safari will throw errors when attempting\n // to get either `parent` or `self`\n try {\n return window.parent !== window.self;\n } catch (x) {\n return true;\n }\n }\n\n /**\n * Creates functions to query the DOM using a given method.\n *\n * @private\n * @param {string} method\n * The method to create the query with.\n *\n * @return {Function}\n * The query method\n */\n function createQuerier(method) {\n return function (selector, context) {\n if (!isNonBlankString(selector)) {\n return document[method](null);\n }\n if (isNonBlankString(context)) {\n context = document.querySelector(context);\n }\n const ctx = isEl(context) ? context : document;\n return ctx[method] && ctx[method](selector);\n };\n }\n\n /**\n * Creates an element and applies properties, attributes, and inserts content.\n *\n * @param {string} [tagName='div']\n * Name of tag to be created.\n *\n * @param {Object} [properties={}]\n * Element properties to be applied.\n *\n * @param {Object} [attributes={}]\n * Element attributes to be applied.\n *\n * @param {ContentDescriptor} [content]\n * A content descriptor object.\n *\n * @return {Element}\n * The element that was created.\n */\n function createEl(tagName = 'div', properties = {}, attributes = {}, content) {\n const el = document.createElement(tagName);\n Object.getOwnPropertyNames(properties).forEach(function (propName) {\n const val = properties[propName];\n\n // Handle textContent since it's not supported everywhere and we have a\n // method for it.\n if (propName === 'textContent') {\n textContent(el, val);\n } else if (el[propName] !== val || propName === 'tabIndex') {\n el[propName] = val;\n }\n });\n Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n el.setAttribute(attrName, attributes[attrName]);\n });\n if (content) {\n appendContent(el, content);\n }\n return el;\n }\n\n /**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param {Element} el\n * The element to add text content into\n *\n * @param {string} text\n * The text content to add.\n *\n * @return {Element}\n * The element with added text content.\n */\n function textContent(el, text) {\n if (typeof el.textContent === 'undefined') {\n el.innerText = text;\n } else {\n el.textContent = text;\n }\n return el;\n }\n\n /**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n * Element to insert\n *\n * @param {Element} parent\n * Element to insert child into\n */\n function prependTo(child, parent) {\n if (parent.firstChild) {\n parent.insertBefore(child, parent.firstChild);\n } else {\n parent.appendChild(child);\n }\n }\n\n /**\n * Check if an element has a class name.\n *\n * @param {Element} element\n * Element to check\n *\n * @param {string} classToCheck\n * Class name to check for\n *\n * @return {boolean}\n * Will be `true` if the element has a class, `false` otherwise.\n *\n * @throws {Error}\n * Throws an error if `classToCheck` has white space.\n */\n function hasClass(element, classToCheck) {\n throwIfWhitespace(classToCheck);\n return element.classList.contains(classToCheck);\n }\n\n /**\n * Add a class name to an element.\n *\n * @param {Element} element\n * Element to add class name to.\n *\n * @param {...string} classesToAdd\n * One or more class name to add.\n *\n * @return {Element}\n * The DOM element with the added class name.\n */\n function addClass(element, ...classesToAdd) {\n element.classList.add(...classesToAdd.reduce((prev, current) => prev.concat(current.split(/\\s+/)), []));\n return element;\n }\n\n /**\n * Remove a class name from an element.\n *\n * @param {Element} element\n * Element to remove a class name from.\n *\n * @param {...string} classesToRemove\n * One or more class name to remove.\n *\n * @return {Element}\n * The DOM element with class name removed.\n */\n function removeClass(element, ...classesToRemove) {\n // Protect in case the player gets disposed\n if (!element) {\n log$1.warn(\"removeClass was called with an element that doesn't exist\");\n return null;\n }\n element.classList.remove(...classesToRemove.reduce((prev, current) => prev.concat(current.split(/\\s+/)), []));\n return element;\n }\n\n /**\n * The callback definition for toggleClass.\n *\n * @callback module:dom~PredicateCallback\n * @param {Element} element\n * The DOM element of the Component.\n *\n * @param {string} classToToggle\n * The `className` that wants to be toggled\n *\n * @return {boolean|undefined}\n * If `true` is returned, the `classToToggle` will be added to the\n * `element`. If `false`, the `classToToggle` will be removed from\n * the `element`. If `undefined`, the callback will be ignored.\n */\n\n /**\n * Adds or removes a class name to/from an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param {Element} element\n * The element to toggle a class name on.\n *\n * @param {string} classToToggle\n * The class that should be toggled.\n *\n * @param {boolean|module:dom~PredicateCallback} [predicate]\n * See the return value for {@link module:dom~PredicateCallback}\n *\n * @return {Element}\n * The element with a class that has been toggled.\n */\n function toggleClass(element, classToToggle, predicate) {\n if (typeof predicate === 'function') {\n predicate = predicate(element, classToToggle);\n }\n if (typeof predicate !== 'boolean') {\n predicate = undefined;\n }\n classToToggle.split(/\\s+/).forEach(className => element.classList.toggle(className, predicate));\n return element;\n }\n\n /**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n * Element to add attributes to.\n *\n * @param {Object} [attributes]\n * Attributes to be applied.\n */\n function setAttributes(el, attributes) {\n Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n const attrValue = attributes[attrName];\n if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n el.removeAttribute(attrName);\n } else {\n el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n }\n });\n }\n\n /**\n * Get an element's attribute values, as defined on the HTML tag.\n *\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute.\n *\n * @param {Element} tag\n * Element from which to get tag attributes.\n *\n * @return {Object}\n * All attributes of the element. Boolean attributes will be `true` or\n * `false`, others will be strings.\n */\n function getAttributes(tag) {\n const obj = {};\n\n // known boolean attributes\n // we can check for matching boolean properties, but not all browsers\n // and not all tags know about these attributes, so, we still want to check them manually\n const knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n if (tag && tag.attributes && tag.attributes.length > 0) {\n const attrs = tag.attributes;\n for (let i = attrs.length - 1; i >= 0; i--) {\n const attrName = attrs[i].name;\n let attrVal = attrs[i].value;\n\n // check for known booleans\n // the matching element property will return a value for typeof\n if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n // the value of an included boolean attribute is typically an empty\n // string ('') which would equal false if we just check for a false value.\n // we also don't want support bad code like autoplay='false'\n attrVal = attrVal !== null ? true : false;\n }\n obj[attrName] = attrVal;\n }\n }\n return obj;\n }\n\n /**\n * Get the value of an element's attribute.\n *\n * @param {Element} el\n * A DOM element.\n *\n * @param {string} attribute\n * Attribute to get the value of.\n *\n * @return {string}\n * The value of the attribute.\n */\n function getAttribute(el, attribute) {\n return el.getAttribute(attribute);\n }\n\n /**\n * Set the value of an element's attribute.\n *\n * @param {Element} el\n * A DOM element.\n *\n * @param {string} attribute\n * Attribute to set.\n *\n * @param {string} value\n * Value to set the attribute to.\n */\n function setAttribute(el, attribute, value) {\n el.setAttribute(attribute, value);\n }\n\n /**\n * Remove an element's attribute.\n *\n * @param {Element} el\n * A DOM element.\n *\n * @param {string} attribute\n * Attribute to remove.\n */\n function removeAttribute(el, attribute) {\n el.removeAttribute(attribute);\n }\n\n /**\n * Attempt to block the ability to select text.\n */\n function blockTextSelection() {\n document.body.focus();\n document.onselectstart = function () {\n return false;\n };\n }\n\n /**\n * Turn off text selection blocking.\n */\n function unblockTextSelection() {\n document.onselectstart = function () {\n return true;\n };\n }\n\n /**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param {Element} el\n * Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n * Always returns a plain object - or `undefined` if it cannot.\n */\n function getBoundingClientRect(el) {\n if (el && el.getBoundingClientRect && el.parentNode) {\n const rect = el.getBoundingClientRect();\n const result = {};\n ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(k => {\n if (rect[k] !== undefined) {\n result[k] = rect[k];\n }\n });\n if (!result.height) {\n result.height = parseFloat(computedStyle(el, 'height'));\n }\n if (!result.width) {\n result.width = parseFloat(computedStyle(el, 'width'));\n }\n return result;\n }\n }\n\n /**\n * Represents the position of a DOM element on the page.\n *\n * @typedef {Object} module:dom~Position\n *\n * @property {number} left\n * Pixels to the left.\n *\n * @property {number} top\n * Pixels from the top.\n */\n\n /**\n * Get the position of an element in the DOM.\n *\n * Uses `getBoundingClientRect` technique from John Resig.\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param {Element} el\n * Element from which to get offset.\n *\n * @return {module:dom~Position}\n * The position of the element that was passed in.\n */\n function findPosition(el) {\n if (!el || el && !el.offsetParent) {\n return {\n left: 0,\n top: 0,\n width: 0,\n height: 0\n };\n }\n const width = el.offsetWidth;\n const height = el.offsetHeight;\n let left = 0;\n let top = 0;\n while (el.offsetParent && el !== document[FullscreenApi.fullscreenElement]) {\n left += el.offsetLeft;\n top += el.offsetTop;\n el = el.offsetParent;\n }\n return {\n left,\n top,\n width,\n height\n };\n }\n\n /**\n * Represents x and y coordinates for a DOM element or mouse pointer.\n *\n * @typedef {Object} module:dom~Coordinates\n *\n * @property {number} x\n * x coordinate in pixels\n *\n * @property {number} y\n * y coordinate in pixels\n */\n\n /**\n * Get the pointer position within an element.\n *\n * The base on the coordinates are the bottom left of the element.\n *\n * @param {Element} el\n * Element on which to get the pointer position on.\n *\n * @param {Event} event\n * Event object.\n *\n * @return {module:dom~Coordinates}\n * A coordinates object corresponding to the mouse position.\n *\n */\n function getPointerPosition(el, event) {\n const translated = {\n x: 0,\n y: 0\n };\n if (IS_IOS) {\n let item = el;\n while (item && item.nodeName.toLowerCase() !== 'html') {\n const transform = computedStyle(item, 'transform');\n if (/^matrix/.test(transform)) {\n const values = transform.slice(7, -1).split(/,\\s/).map(Number);\n translated.x += values[4];\n translated.y += values[5];\n } else if (/^matrix3d/.test(transform)) {\n const values = transform.slice(9, -1).split(/,\\s/).map(Number);\n translated.x += values[12];\n translated.y += values[13];\n }\n item = item.parentNode;\n }\n }\n const position = {};\n const boxTarget = findPosition(event.target);\n const box = findPosition(el);\n const boxW = box.width;\n const boxH = box.height;\n let offsetY = event.offsetY - (box.top - boxTarget.top);\n let offsetX = event.offsetX - (box.left - boxTarget.left);\n if (event.changedTouches) {\n offsetX = event.changedTouches[0].pageX - box.left;\n offsetY = event.changedTouches[0].pageY + box.top;\n if (IS_IOS) {\n offsetX -= translated.x;\n offsetY -= translated.y;\n }\n }\n position.y = 1 - Math.max(0, Math.min(1, offsetY / boxH));\n position.x = Math.max(0, Math.min(1, offsetX / boxW));\n return position;\n }\n\n /**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param {*} value\n * Check if this value is a text node.\n *\n * @return {boolean}\n * Will be `true` if the value is a text node, `false` otherwise.\n */\n function isTextNode$1(value) {\n return isObject$1(value) && value.nodeType === 3;\n }\n\n /**\n * Empties the contents of an element.\n *\n * @param {Element} el\n * The element to empty children from\n *\n * @return {Element}\n * The element with no children\n */\n function emptyEl(el) {\n while (el.firstChild) {\n el.removeChild(el.firstChild);\n }\n return el;\n }\n\n /**\n * This is a mixed value that describes content to be injected into the DOM\n * via some method. It can be of the following types:\n *\n * Type | Description\n * -----------|-------------\n * `string` | The value will be normalized into a text node.\n * `Element` | The value will be accepted as-is.\n * `Text` | A TextNode. The value will be accepted as-is.\n * `Array` | A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).\n * `Function` | A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.\n *\n * @typedef {string|Element|Text|Array|Function} ContentDescriptor\n */\n\n /**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but helps protect\n * from falling into the trap of simply writing to `innerHTML`, which could\n * be an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {ContentDescriptor} content\n * A content descriptor value.\n *\n * @return {Array}\n * All of the content that was passed in, normalized to an array of\n * elements or text nodes.\n */\n function normalizeContent(content) {\n // First, invoke content if it is a function. If it produces an array,\n // that needs to happen before normalization.\n if (typeof content === 'function') {\n content = content();\n }\n\n // Next up, normalize to an array, so one or many items can be normalized,\n // filtered, and returned.\n return (Array.isArray(content) ? content : [content]).map(value => {\n // First, invoke value if it is a function to produce a new value,\n // which will be subsequently normalized to a Node of some kind.\n if (typeof value === 'function') {\n value = value();\n }\n if (isEl(value) || isTextNode$1(value)) {\n return value;\n }\n if (typeof value === 'string' && /\\S/.test(value)) {\n return document.createTextNode(value);\n }\n }).filter(value => value);\n }\n\n /**\n * Normalizes and appends content to an element.\n *\n * @param {Element} el\n * Element to append normalized content to.\n *\n * @param {ContentDescriptor} content\n * A content descriptor value.\n *\n * @return {Element}\n * The element with appended normalized content.\n */\n function appendContent(el, content) {\n normalizeContent(content).forEach(node => el.appendChild(node));\n return el;\n }\n\n /**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n * Element to insert normalized content into.\n *\n * @param {ContentDescriptor} content\n * A content descriptor value.\n *\n * @return {Element}\n * The element with inserted normalized content.\n */\n function insertContent(el, content) {\n return appendContent(emptyEl(el), content);\n }\n\n /**\n * Check if an event was a single left click.\n *\n * @param {Event} event\n * Event object.\n *\n * @return {boolean}\n * Will be `true` if a single left click, `false` otherwise.\n */\n function isSingleLeftClick(event) {\n // Note: if you create something draggable, be sure to\n // call it on both `mousedown` and `mousemove` event,\n // otherwise `mousedown` should be enough for a button\n\n if (event.button === undefined && event.buttons === undefined) {\n // Why do we need `buttons` ?\n // Because, middle mouse sometimes have this:\n // e.button === 0 and e.buttons === 4\n // Furthermore, we want to prevent combination click, something like\n // HOLD middlemouse then left click, that would be\n // e.button === 0, e.buttons === 5\n // just `button` is not gonna work\n\n // Alright, then what this block does ?\n // this is for chrome `simulate mobile devices`\n // I want to support this as well\n\n return true;\n }\n if (event.button === 0 && event.buttons === undefined) {\n // Touch screen, sometimes on some specific device, `buttons`\n // doesn't have anything (safari on ios, blackberry...)\n\n return true;\n }\n\n // `mouseup` event on a single left click has\n // `button` and `buttons` equal to 0\n if (event.type === 'mouseup' && event.button === 0 && event.buttons === 0) {\n return true;\n }\n if (event.button !== 0 || event.buttons !== 1) {\n // This is the reason we have those if else block above\n // if any special case we can catch and let it slide\n // we do it above, when get to here, this definitely\n // is-not-left-click\n\n return false;\n }\n return true;\n }\n\n /**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param {string} selector\n * A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param {Element|String} [context=document]\n * A DOM element within which to query. Can also be a selector\n * string in which case the first matching element will be used\n * as context. If missing (or no element matches selector), falls\n * back to `document`.\n *\n * @return {Element|null}\n * The element that was found or null.\n */\n const $ = createQuerier('querySelector');\n\n /**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param {string} selector\n * A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param {Element|String} [context=document]\n * A DOM element within which to query. Can also be a selector\n * string in which case the first matching element will be used\n * as context. If missing (or no element matches selector), falls\n * back to `document`.\n *\n * @return {NodeList}\n * A element list of elements that were found. Will be empty if none\n * were found.\n *\n */\n const $$ = createQuerier('querySelectorAll');\n\n /**\n * A safe getComputedStyle.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a\n * null-check to make sure that the player doesn't break in these cases.\n *\n * @param {Element} el\n * The element you want the computed style of\n *\n * @param {string} prop\n * The property name you want\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n */\n function computedStyle(el, prop) {\n if (!el || !prop) {\n return '';\n }\n if (typeof window.getComputedStyle === 'function') {\n let computedStyleValue;\n try {\n computedStyleValue = window.getComputedStyle(el);\n } catch (e) {\n return '';\n }\n return computedStyleValue ? computedStyleValue.getPropertyValue(prop) || computedStyleValue[prop] : '';\n }\n return '';\n }\n\n var Dom = /*#__PURE__*/Object.freeze({\n __proto__: null,\n isReal: isReal,\n isEl: isEl,\n isInFrame: isInFrame,\n createEl: createEl,\n textContent: textContent,\n prependTo: prependTo,\n hasClass: hasClass,\n addClass: addClass,\n removeClass: removeClass,\n toggleClass: toggleClass,\n setAttributes: setAttributes,\n getAttributes: getAttributes,\n getAttribute: getAttribute,\n setAttribute: setAttribute,\n removeAttribute: removeAttribute,\n blockTextSelection: blockTextSelection,\n unblockTextSelection: unblockTextSelection,\n getBoundingClientRect: getBoundingClientRect,\n findPosition: findPosition,\n getPointerPosition: getPointerPosition,\n isTextNode: isTextNode$1,\n emptyEl: emptyEl,\n normalizeContent: normalizeContent,\n appendContent: appendContent,\n insertContent: insertContent,\n isSingleLeftClick: isSingleLeftClick,\n $: $,\n $$: $$,\n computedStyle: computedStyle\n });\n\n /**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\n let _windowLoaded = false;\n let videojs$1;\n\n /**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\n const autoSetup = function () {\n if (videojs$1.options.autoSetup === false) {\n return;\n }\n const vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n const audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n const divs = Array.prototype.slice.call(document.getElementsByTagName('video-js'));\n const mediaEls = vids.concat(audios, divs);\n\n // Check if any media elements exist\n if (mediaEls && mediaEls.length > 0) {\n for (let i = 0, e = mediaEls.length; i < e; i++) {\n const mediaEl = mediaEls[i];\n\n // Check if element exists, has getAttribute func.\n if (mediaEl && mediaEl.getAttribute) {\n // Make sure this player hasn't already been set up.\n if (mediaEl.player === undefined) {\n const options = mediaEl.getAttribute('data-setup');\n\n // Check if data-setup attr exists.\n // We only auto-setup if they've added the data-setup attr.\n if (options !== null) {\n // Create new video.js instance.\n videojs$1(mediaEl);\n }\n }\n\n // If getAttribute isn't defined, we need to wait for the DOM.\n } else {\n autoSetupTimeout(1);\n break;\n }\n }\n\n // No videos were found, so keep looping unless page is finished loading.\n } else if (!_windowLoaded) {\n autoSetupTimeout(1);\n }\n };\n\n /**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n * How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n * The videojs library function\n */\n function autoSetupTimeout(wait, vjs) {\n // Protect against breakage in non-browser environments\n if (!isReal()) {\n return;\n }\n if (vjs) {\n videojs$1 = vjs;\n }\n window.setTimeout(autoSetup, wait);\n }\n\n /**\n * Used to set the internal tracking of window loaded state to true.\n *\n * @private\n */\n function setWindowLoaded() {\n _windowLoaded = true;\n window.removeEventListener('load', setWindowLoaded);\n }\n if (isReal()) {\n if (document.readyState === 'complete') {\n setWindowLoaded();\n } else {\n /**\n * Listen for the load event on window, and set _windowLoaded to true.\n *\n * We use a standard event listener here to avoid incrementing the GUID\n * before any players are created.\n *\n * @listens load\n */\n window.addEventListener('load', setWindowLoaded);\n }\n }\n\n /**\n * @file stylesheet.js\n * @module stylesheet\n */\n\n /**\n * Create a DOM style element given a className for it.\n *\n * @param {string} className\n * The className to add to the created style element.\n *\n * @return {Element}\n * The element that was created.\n */\n const createStyleElement = function (className) {\n const style = document.createElement('style');\n style.className = className;\n return style;\n };\n\n /**\n * Add text to a DOM element.\n *\n * @param {Element} el\n * The Element to add text content to.\n *\n * @param {string} content\n * The text to add to the element.\n */\n const setTextContent = function (el, content) {\n if (el.styleSheet) {\n el.styleSheet.cssText = content;\n } else {\n el.textContent = content;\n }\n };\n\n /**\n * @file dom-data.js\n * @module dom-data\n */\n\n /**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\n var DomData = new WeakMap();\n\n /**\n * @file guid.js\n * @module guid\n */\n\n // Default value for GUIDs. This allows us to reset the GUID counter in tests.\n //\n // The initial GUID is 3 because some users have come to rely on the first\n // default player ID ending up as `vjs_video_3`.\n //\n // See: https://github.com/videojs/video.js/pull/6216\n const _initialGuid = 3;\n\n /**\n * Unique ID for an element or function\n *\n * @type {Number}\n */\n let _guid = _initialGuid;\n\n /**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n * A new unique ID.\n */\n function newGUID() {\n return _guid++;\n }\n\n /**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @file events.js\n * @module events\n */\n\n /**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n * Element to clean up\n *\n * @param {string} type\n * Type of event to clean up\n */\n function _cleanUpEvents(elem, type) {\n if (!DomData.has(elem)) {\n return;\n }\n const data = DomData.get(elem);\n\n // Remove the events of a particular type if there are none left\n if (data.handlers[type].length === 0) {\n delete data.handlers[type];\n // data.handlers[type] = null;\n // Setting to null was causing an error with data.handlers\n\n // Remove the meta-handler from the element\n if (elem.removeEventListener) {\n elem.removeEventListener(type, data.dispatcher, false);\n } else if (elem.detachEvent) {\n elem.detachEvent('on' + type, data.dispatcher);\n }\n }\n\n // Remove the events object if there are no types left\n if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n delete data.handlers;\n delete data.dispatcher;\n delete data.disabled;\n }\n\n // Finally remove the element data if there is no data left\n if (Object.getOwnPropertyNames(data).length === 0) {\n DomData.delete(elem);\n }\n }\n\n /**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n * The event method we want to use.\n *\n * @param {Element|Object} elem\n * Element or object to bind listeners to\n *\n * @param {string} type\n * Type of event to bind to.\n *\n * @param {Function} callback\n * Event listener.\n */\n function _handleMultipleEvents(fn, elem, types, callback) {\n types.forEach(function (type) {\n // Call the event method for each one of the types\n fn(elem, type, callback);\n });\n }\n\n /**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n * Event object to fix.\n *\n * @return {Object}\n * Fixed event object.\n */\n function fixEvent(event) {\n if (event.fixed_) {\n return event;\n }\n function returnTrue() {\n return true;\n }\n function returnFalse() {\n return false;\n }\n\n // Test if fixing up is needed\n // Used to check if !event.stopPropagation instead of isPropagationStopped\n // But native events return true for stopPropagation, but don't have\n // other expected methods like isPropagationStopped. Seems to be a problem\n // with the Javascript Ninja code. So we're just overriding all events now.\n if (!event || !event.isPropagationStopped || !event.isImmediatePropagationStopped) {\n const old = event || window.event;\n event = {};\n // Clone the old object so that we can modify the values event = {};\n // IE8 Doesn't like when you mess with native event properties\n // Firefox returns false for event.hasOwnProperty('type') and other props\n // which makes copying more difficult.\n // TODO: Probably best to create a whitelist of event props\n for (const key in old) {\n // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n // and webkitMovementX/Y\n // Lighthouse complains if Event.path is copied\n if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY' && key !== 'path') {\n // Chrome 32+ warns if you try to copy deprecated returnValue, but\n // we still want to if preventDefault isn't supported (IE8).\n if (!(key === 'returnValue' && old.preventDefault)) {\n event[key] = old[key];\n }\n }\n }\n\n // The event occurred on this element\n if (!event.target) {\n event.target = event.srcElement || document;\n }\n\n // Handle which other element the event is related to\n if (!event.relatedTarget) {\n event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n }\n\n // Stop the default browser action\n event.preventDefault = function () {\n if (old.preventDefault) {\n old.preventDefault();\n }\n event.returnValue = false;\n old.returnValue = false;\n event.defaultPrevented = true;\n };\n event.defaultPrevented = false;\n\n // Stop the event from bubbling\n event.stopPropagation = function () {\n if (old.stopPropagation) {\n old.stopPropagation();\n }\n event.cancelBubble = true;\n old.cancelBubble = true;\n event.isPropagationStopped = returnTrue;\n };\n event.isPropagationStopped = returnFalse;\n\n // Stop the event from bubbling and executing other handlers\n event.stopImmediatePropagation = function () {\n if (old.stopImmediatePropagation) {\n old.stopImmediatePropagation();\n }\n event.isImmediatePropagationStopped = returnTrue;\n event.stopPropagation();\n };\n event.isImmediatePropagationStopped = returnFalse;\n\n // Handle mouse position\n if (event.clientX !== null && event.clientX !== undefined) {\n const doc = document.documentElement;\n const body = document.body;\n event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n }\n\n // Handle key presses\n event.which = event.charCode || event.keyCode;\n\n // Fix button for mouse clicks:\n // 0 == left; 1 == middle; 2 == right\n if (event.button !== null && event.button !== undefined) {\n // The following is disabled because it does not pass videojs-standard\n // and... yikes.\n /* eslint-disable */\n event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n /* eslint-enable */\n }\n }\n\n event.fixed_ = true;\n // Returns fixed-up instance\n return event;\n }\n\n /**\n * Whether passive event listeners are supported\n */\n let _supportsPassive;\n const supportsPassive = function () {\n if (typeof _supportsPassive !== 'boolean') {\n _supportsPassive = false;\n try {\n const opts = Object.defineProperty({}, 'passive', {\n get() {\n _supportsPassive = true;\n }\n });\n window.addEventListener('test', null, opts);\n window.removeEventListener('test', null, opts);\n } catch (e) {\n // disregard\n }\n }\n return _supportsPassive;\n };\n\n /**\n * Touch events Chrome expects to be passive\n */\n const passiveEvents = ['touchstart', 'touchmove'];\n\n /**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n * Element or object to bind listeners to\n *\n * @param {string|string[]} type\n * Type of event to bind to.\n *\n * @param {Function} fn\n * Event listener.\n */\n function on(elem, type, fn) {\n if (Array.isArray(type)) {\n return _handleMultipleEvents(on, elem, type, fn);\n }\n if (!DomData.has(elem)) {\n DomData.set(elem, {});\n }\n const data = DomData.get(elem);\n\n // We need a place to store all our handler data\n if (!data.handlers) {\n data.handlers = {};\n }\n if (!data.handlers[type]) {\n data.handlers[type] = [];\n }\n if (!fn.guid) {\n fn.guid = newGUID();\n }\n data.handlers[type].push(fn);\n if (!data.dispatcher) {\n data.disabled = false;\n data.dispatcher = function (event, hash) {\n if (data.disabled) {\n return;\n }\n event = fixEvent(event);\n const handlers = data.handlers[event.type];\n if (handlers) {\n // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n const handlersCopy = handlers.slice(0);\n for (let m = 0, n = handlersCopy.length; m < n; m++) {\n if (event.isImmediatePropagationStopped()) {\n break;\n } else {\n try {\n handlersCopy[m].call(elem, event, hash);\n } catch (e) {\n log$1.error(e);\n }\n }\n }\n }\n };\n }\n if (data.handlers[type].length === 1) {\n if (elem.addEventListener) {\n let options = false;\n if (supportsPassive() && passiveEvents.indexOf(type) > -1) {\n options = {\n passive: true\n };\n }\n elem.addEventListener(type, data.dispatcher, options);\n } else if (elem.attachEvent) {\n elem.attachEvent('on' + type, data.dispatcher);\n }\n }\n }\n\n /**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n * Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n * Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {Function} [fn]\n * Specific listener to remove. Don't include to remove listeners for an event\n * type.\n */\n function off(elem, type, fn) {\n // Don't want to add a cache object through getElData if not needed\n if (!DomData.has(elem)) {\n return;\n }\n const data = DomData.get(elem);\n\n // If no events exist, nothing to unbind\n if (!data.handlers) {\n return;\n }\n if (Array.isArray(type)) {\n return _handleMultipleEvents(off, elem, type, fn);\n }\n\n // Utility function\n const removeType = function (el, t) {\n data.handlers[t] = [];\n _cleanUpEvents(el, t);\n };\n\n // Are we removing all bound events?\n if (type === undefined) {\n for (const t in data.handlers) {\n if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n removeType(elem, t);\n }\n }\n return;\n }\n const handlers = data.handlers[type];\n\n // If no handlers exist, nothing to unbind\n if (!handlers) {\n return;\n }\n\n // If no listener was provided, remove all listeners for type\n if (!fn) {\n removeType(elem, type);\n return;\n }\n\n // We're only removing a single handler\n if (fn.guid) {\n for (let n = 0; n < handlers.length; n++) {\n if (handlers[n].guid === fn.guid) {\n handlers.splice(n--, 1);\n }\n }\n }\n _cleanUpEvents(elem, type);\n }\n\n /**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n * Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n * A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n * data hash to pass along with the event\n *\n * @return {boolean|undefined}\n * Returns the opposite of `defaultPrevented` if default was\n * prevented. Otherwise, returns `undefined`\n */\n function trigger(elem, event, hash) {\n // Fetches element data and a reference to the parent (for bubbling).\n // Don't want to add a data object to cache for every parent,\n // so checking hasElData first.\n const elemData = DomData.has(elem) ? DomData.get(elem) : {};\n const parent = elem.parentNode || elem.ownerDocument;\n // type = event.type || event,\n // handler;\n\n // If an event name was passed as a string, creates an event out of it\n if (typeof event === 'string') {\n event = {\n type: event,\n target: elem\n };\n } else if (!event.target) {\n event.target = elem;\n }\n\n // Normalizes the event properties.\n event = fixEvent(event);\n\n // If the passed element has a dispatcher, executes the established handlers.\n if (elemData.dispatcher) {\n elemData.dispatcher.call(elem, event, hash);\n }\n\n // Unless explicitly stopped or the event does not bubble (e.g. media events)\n // recursively calls this function to bubble the event up the DOM.\n if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n trigger.call(null, parent, event, hash);\n\n // If at the top of the DOM, triggers the default action unless disabled.\n } else if (!parent && !event.defaultPrevented && event.target && event.target[event.type]) {\n if (!DomData.has(event.target)) {\n DomData.set(event.target, {});\n }\n const targetData = DomData.get(event.target);\n\n // Checks if the target has a default action for this event.\n if (event.target[event.type]) {\n // Temporarily disables event dispatching on the target as we have already executed the handler.\n targetData.disabled = true;\n // Executes the default action.\n if (typeof event.target[event.type] === 'function') {\n event.target[event.type]();\n }\n // Re-enables event dispatching.\n targetData.disabled = false;\n }\n }\n\n // Inform the triggerer if the default was prevented by returning false\n return !event.defaultPrevented;\n }\n\n /**\n * Trigger a listener only once for an event.\n *\n * @param {Element|Object} elem\n * Element or object to bind to.\n *\n * @param {string|string[]} type\n * Name/type of event\n *\n * @param {Event~EventListener} fn\n * Event listener function\n */\n function one(elem, type, fn) {\n if (Array.isArray(type)) {\n return _handleMultipleEvents(one, elem, type, fn);\n }\n const func = function () {\n off(elem, type, func);\n fn.apply(this, arguments);\n };\n\n // copy the guid to the new function so it can removed using the original function's ID\n func.guid = fn.guid = fn.guid || newGUID();\n on(elem, type, func);\n }\n\n /**\n * Trigger a listener only once and then turn if off for all\n * configured events\n *\n * @param {Element|Object} elem\n * Element or object to bind to.\n *\n * @param {string|string[]} type\n * Name/type of event\n *\n * @param {Event~EventListener} fn\n * Event listener function\n */\n function any(elem, type, fn) {\n const func = function () {\n off(elem, type, func);\n fn.apply(this, arguments);\n };\n\n // copy the guid to the new function so it can removed using the original function's ID\n func.guid = fn.guid = fn.guid || newGUID();\n\n // multiple ons, but one off for everything\n on(elem, type, func);\n }\n\n var Events = /*#__PURE__*/Object.freeze({\n __proto__: null,\n fixEvent: fixEvent,\n on: on,\n off: off,\n trigger: trigger,\n one: one,\n any: any\n });\n\n /**\n * @file fn.js\n * @module fn\n */\n const UPDATE_REFRESH_INTERVAL = 30;\n\n /**\n * A private, internal-only function for changing the context of a function.\n *\n * It also stores a unique id on the function so it can be easily removed from\n * events.\n *\n * @private\n * @function\n * @param {*} context\n * The object to bind as scope.\n *\n * @param {Function} fn\n * The function to be bound to a scope.\n *\n * @param {number} [uid]\n * An optional unique ID for the function to be set\n *\n * @return {Function}\n * The new function that will be bound into the context given\n */\n const bind_ = function (context, fn, uid) {\n // Make sure the function has a unique ID\n if (!fn.guid) {\n fn.guid = newGUID();\n }\n\n // Create the new function that changes the context\n const bound = fn.bind(context);\n\n // Allow for the ability to individualize this function\n // Needed in the case where multiple objects might share the same prototype\n // IF both items add an event listener with the same function, then you try to remove just one\n // it will remove both because they both have the same guid.\n // when using this, you need to use the bind method when you remove the listener as well.\n // currently used in text tracks\n bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n return bound;\n };\n\n /**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @function\n * @param {Function} fn\n * The function to be throttled.\n *\n * @param {number} wait\n * The number of milliseconds by which to throttle.\n *\n * @return {Function}\n */\n const throttle = function (fn, wait) {\n let last = window.performance.now();\n const throttled = function (...args) {\n const now = window.performance.now();\n if (now - last >= wait) {\n fn(...args);\n last = now;\n }\n };\n return throttled;\n };\n\n /**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @function\n * @param {Function} func\n * The function to wrap with debounce behavior.\n *\n * @param {number} wait\n * The number of milliseconds to wait after the last invocation.\n *\n * @param {boolean} [immediate]\n * Whether or not to invoke the function immediately upon creation.\n *\n * @param {Object} [context=window]\n * The \"context\" in which the debounced function should debounce. For\n * example, if this function should be tied to a Video.js player,\n * the player can be passed here. Alternatively, defaults to the\n * global `window` object.\n *\n * @return {Function}\n * A debounced function.\n */\n const debounce = function (func, wait, immediate, context = window) {\n let timeout;\n const cancel = () => {\n context.clearTimeout(timeout);\n timeout = null;\n };\n\n /* eslint-disable consistent-this */\n const debounced = function () {\n const self = this;\n const args = arguments;\n let later = function () {\n timeout = null;\n later = null;\n if (!immediate) {\n func.apply(self, args);\n }\n };\n if (!timeout && immediate) {\n func.apply(self, args);\n }\n context.clearTimeout(timeout);\n timeout = context.setTimeout(later, wait);\n };\n /* eslint-enable consistent-this */\n\n debounced.cancel = cancel;\n return debounced;\n };\n\n var Fn = /*#__PURE__*/Object.freeze({\n __proto__: null,\n UPDATE_REFRESH_INTERVAL: UPDATE_REFRESH_INTERVAL,\n bind_: bind_,\n throttle: throttle,\n debounce: debounce\n });\n\n /**\n * @file src/js/event-target.js\n */\n let EVENT_MAP;\n\n /**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\n class EventTarget$2 {\n /**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to call with `EventTarget`s\n */\n on(type, fn) {\n // Remove the addEventListener alias before calling Events.on\n // so we don't get into an infinite type loop\n const ael = this.addEventListener;\n this.addEventListener = () => {};\n on(this, type, fn);\n this.addEventListener = ael;\n }\n /**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to remove.\n */\n off(type, fn) {\n off(this, type, fn);\n }\n /**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to be called once for each event name.\n */\n one(type, fn) {\n // Remove the addEventListener aliasing Events.on\n // so we don't get into an infinite type loop\n const ael = this.addEventListener;\n this.addEventListener = () => {};\n one(this, type, fn);\n this.addEventListener = ael;\n }\n /**\n * This function will add an `event listener` that gets triggered only once and is\n * removed from all events. This is like adding an array of `event listener`s\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on all events the\n * first time it is triggered.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to be called once for each event name.\n */\n any(type, fn) {\n // Remove the addEventListener aliasing Events.on\n // so we don't get into an infinite type loop\n const ael = this.addEventListener;\n this.addEventListener = () => {};\n any(this, type, fn);\n this.addEventListener = ael;\n }\n /**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n * The name of the event, an `Event`, or an object with a key of type set to\n * an event name.\n */\n trigger(event) {\n const type = event.type || event;\n\n // deprecation\n // In a future version we should default target to `this`\n // similar to how we default the target to `elem` in\n // `Events.trigger`. Right now the default `target` will be\n // `document` due to the `Event.fixEvent` call.\n if (typeof event === 'string') {\n event = {\n type\n };\n }\n event = fixEvent(event);\n if (this.allowedEvents_[type] && this['on' + type]) {\n this['on' + type](event);\n }\n trigger(this, event);\n }\n queueTrigger(event) {\n // only set up EVENT_MAP if it'll be used\n if (!EVENT_MAP) {\n EVENT_MAP = new Map();\n }\n const type = event.type || event;\n let map = EVENT_MAP.get(this);\n if (!map) {\n map = new Map();\n EVENT_MAP.set(this, map);\n }\n const oldTimeout = map.get(type);\n map.delete(type);\n window.clearTimeout(oldTimeout);\n const timeout = window.setTimeout(() => {\n map.delete(type);\n // if we cleared out all timeouts for the current target, delete its map\n if (map.size === 0) {\n map = null;\n EVENT_MAP.delete(this);\n }\n this.trigger(event);\n }, 0);\n map.set(type, timeout);\n }\n }\n\n /**\n * A Custom DOM event.\n *\n * @typedef {CustomEvent} Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n /**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {Event} event\n * the event that triggered this function\n *\n * @param {Object} [hash]\n * hash of data sent during the event\n */\n\n /**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n * will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\n EventTarget$2.prototype.allowedEvents_ = {};\n\n /**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\n EventTarget$2.prototype.addEventListener = EventTarget$2.prototype.on;\n\n /**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\n EventTarget$2.prototype.removeEventListener = EventTarget$2.prototype.off;\n\n /**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\n EventTarget$2.prototype.dispatchEvent = EventTarget$2.prototype.trigger;\n\n /**\n * @file mixins/evented.js\n * @module evented\n */\n const objName = obj => {\n if (typeof obj.name === 'function') {\n return obj.name();\n }\n if (typeof obj.name === 'string') {\n return obj.name;\n }\n if (obj.name_) {\n return obj.name_;\n }\n if (obj.constructor && obj.constructor.name) {\n return obj.constructor.name;\n }\n return typeof obj;\n };\n\n /**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param {Object} object\n * An object to test.\n *\n * @return {boolean}\n * Whether or not the object appears to be evented.\n */\n const isEvented = object => object instanceof EventTarget$2 || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(k => typeof object[k] === 'function');\n\n /**\n * Adds a callback to run after the evented mixin applied.\n *\n * @param {Object} object\n * An object to Add\n * @param {Function} callback\n * The callback to run.\n */\n const addEventedCallback = (target, callback) => {\n if (isEvented(target)) {\n callback();\n } else {\n if (!target.eventedCallbacks) {\n target.eventedCallbacks = [];\n }\n target.eventedCallbacks.push(callback);\n }\n };\n\n /**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param {string|Array} type\n * The type value to test.\n *\n * @return {boolean}\n * Whether or not the type is a valid event type.\n */\n const isValidEventType = type =>\n // The regex here verifies that the `type` contains at least one non-\n // whitespace character.\n typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length;\n\n /**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n * If the target does not appear to be a valid event target.\n *\n * @param {Object} target\n * The object to test.\n *\n * @param {Object} obj\n * The evented object we are validating for\n *\n * @param {string} fnName\n * The name of the evented mixin function that called this.\n */\n const validateTarget = (target, obj, fnName) => {\n if (!target || !target.nodeName && !isEvented(target)) {\n throw new Error(`Invalid target for ${objName(obj)}#${fnName}; must be a DOM node or evented object.`);\n }\n };\n\n /**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n * If the type does not appear to be a valid event type.\n *\n * @param {string|Array} type\n * The type to test.\n *\n * @param {Object} obj\n * The evented object we are validating for\n *\n * @param {string} fnName\n * The name of the evented mixin function that called this.\n */\n const validateEventType = (type, obj, fnName) => {\n if (!isValidEventType(type)) {\n throw new Error(`Invalid event type for ${objName(obj)}#${fnName}; must be a non-empty string or array.`);\n }\n };\n\n /**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n * If the listener is not a function.\n *\n * @param {Function} listener\n * The listener to test.\n *\n * @param {Object} obj\n * The evented object we are validating for\n *\n * @param {string} fnName\n * The name of the evented mixin function that called this.\n */\n const validateListener = (listener, obj, fnName) => {\n if (typeof listener !== 'function') {\n throw new Error(`Invalid listener for ${objName(obj)}#${fnName}; must be a function.`);\n }\n };\n\n /**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param {Object} self\n * The evented object on which `on()` or `one()` was called. This\n * object will be bound as the `this` value for the listener.\n *\n * @param {Array} args\n * An array of arguments passed to `on()` or `one()`.\n *\n * @param {string} fnName\n * The name of the evented mixin function that called this.\n *\n * @return {Object}\n * An object containing useful values for `on()` or `one()` calls.\n */\n const normalizeListenArgs = (self, args, fnName) => {\n // If the number of arguments is less than 3, the target is always the\n // evented object itself.\n const isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n let target;\n let type;\n let listener;\n if (isTargetingSelf) {\n target = self.eventBusEl_;\n\n // Deal with cases where we got 3 arguments, but we are still listening to\n // the evented object itself.\n if (args.length >= 3) {\n args.shift();\n }\n [type, listener] = args;\n } else {\n [target, type, listener] = args;\n }\n validateTarget(target, self, fnName);\n validateEventType(type, self, fnName);\n validateListener(listener, self, fnName);\n listener = bind_(self, listener);\n return {\n isTargetingSelf,\n target,\n type,\n listener\n };\n };\n\n /**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param {Element|Object} target\n * A DOM node or evented object.\n *\n * @param {string} method\n * The event binding method to use (\"on\" or \"one\").\n *\n * @param {string|Array} type\n * One or more event type(s).\n *\n * @param {Function} listener\n * A listener function.\n */\n const listen = (target, method, type, listener) => {\n validateTarget(target, target, method);\n if (target.nodeName) {\n Events[method](target, type, listener);\n } else {\n target[method](type, listener);\n }\n };\n\n /**\n * Contains methods that provide event capabilities to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\n const EventedMixin = {\n /**\n * Add a listener to an event (or events) on this object or another evented\n * object.\n *\n * @param {string|Array|Element|Object} targetOrType\n * If this is a string or array, it represents the event type(s)\n * that will trigger the listener.\n *\n * Another evented object can be passed here instead, which will\n * cause the listener to listen for events on _that_ object.\n *\n * In either case, the listener's `this` value will be bound to\n * this object.\n *\n * @param {string|Array|Function} typeOrListener\n * If the first argument was a string or array, this should be the\n * listener function. Otherwise, this is a string or array of event\n * type(s).\n *\n * @param {Function} [listener]\n * If the first argument was another evented object, this will be\n * the listener function.\n */\n on(...args) {\n const {\n isTargetingSelf,\n target,\n type,\n listener\n } = normalizeListenArgs(this, args, 'on');\n listen(target, 'on', type, listener);\n\n // If this object is listening to another evented object.\n if (!isTargetingSelf) {\n // If this object is disposed, remove the listener.\n const removeListenerOnDispose = () => this.off(target, type, listener);\n\n // Use the same function ID as the listener so we can remove it later it\n // using the ID of the original listener.\n removeListenerOnDispose.guid = listener.guid;\n\n // Add a listener to the target's dispose event as well. This ensures\n // that if the target is disposed BEFORE this object, we remove the\n // removal listener that was just added. Otherwise, we create a memory leak.\n const removeRemoverOnTargetDispose = () => this.off('dispose', removeListenerOnDispose);\n\n // Use the same function ID as the listener so we can remove it later\n // it using the ID of the original listener.\n removeRemoverOnTargetDispose.guid = listener.guid;\n listen(this, 'on', 'dispose', removeListenerOnDispose);\n listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n }\n },\n /**\n * Add a listener to an event (or events) on this object or another evented\n * object. The listener will be called once per event and then removed.\n *\n * @param {string|Array|Element|Object} targetOrType\n * If this is a string or array, it represents the event type(s)\n * that will trigger the listener.\n *\n * Another evented object can be passed here instead, which will\n * cause the listener to listen for events on _that_ object.\n *\n * In either case, the listener's `this` value will be bound to\n * this object.\n *\n * @param {string|Array|Function} typeOrListener\n * If the first argument was a string or array, this should be the\n * listener function. Otherwise, this is a string or array of event\n * type(s).\n *\n * @param {Function} [listener]\n * If the first argument was another evented object, this will be\n * the listener function.\n */\n one(...args) {\n const {\n isTargetingSelf,\n target,\n type,\n listener\n } = normalizeListenArgs(this, args, 'one');\n\n // Targeting this evented object.\n if (isTargetingSelf) {\n listen(target, 'one', type, listener);\n\n // Targeting another evented object.\n } else {\n // TODO: This wrapper is incorrect! It should only\n // remove the wrapper for the event type that called it.\n // Instead all listeners are removed on the first trigger!\n // see https://github.com/videojs/video.js/issues/5962\n const wrapper = (...largs) => {\n this.off(target, type, wrapper);\n listener.apply(null, largs);\n };\n\n // Use the same function ID as the listener so we can remove it later\n // it using the ID of the original listener.\n wrapper.guid = listener.guid;\n listen(target, 'one', type, wrapper);\n }\n },\n /**\n * Add a listener to an event (or events) on this object or another evented\n * object. The listener will only be called once for the first event that is triggered\n * then removed.\n *\n * @param {string|Array|Element|Object} targetOrType\n * If this is a string or array, it represents the event type(s)\n * that will trigger the listener.\n *\n * Another evented object can be passed here instead, which will\n * cause the listener to listen for events on _that_ object.\n *\n * In either case, the listener's `this` value will be bound to\n * this object.\n *\n * @param {string|Array|Function} typeOrListener\n * If the first argument was a string or array, this should be the\n * listener function. Otherwise, this is a string or array of event\n * type(s).\n *\n * @param {Function} [listener]\n * If the first argument was another evented object, this will be\n * the listener function.\n */\n any(...args) {\n const {\n isTargetingSelf,\n target,\n type,\n listener\n } = normalizeListenArgs(this, args, 'any');\n\n // Targeting this evented object.\n if (isTargetingSelf) {\n listen(target, 'any', type, listener);\n\n // Targeting another evented object.\n } else {\n const wrapper = (...largs) => {\n this.off(target, type, wrapper);\n listener.apply(null, largs);\n };\n\n // Use the same function ID as the listener so we can remove it later\n // it using the ID of the original listener.\n wrapper.guid = listener.guid;\n listen(target, 'any', type, wrapper);\n }\n },\n /**\n * Removes listener(s) from event(s) on an evented object.\n *\n * @param {string|Array|Element|Object} [targetOrType]\n * If this is a string or array, it represents the event type(s).\n *\n * Another evented object can be passed here instead, in which case\n * ALL 3 arguments are _required_.\n *\n * @param {string|Array|Function} [typeOrListener]\n * If the first argument was a string or array, this may be the\n * listener function. Otherwise, this is a string or array of event\n * type(s).\n *\n * @param {Function} [listener]\n * If the first argument was another evented object, this will be\n * the listener function; otherwise, _all_ listeners bound to the\n * event type(s) will be removed.\n */\n off(targetOrType, typeOrListener, listener) {\n // Targeting this evented object.\n if (!targetOrType || isValidEventType(targetOrType)) {\n off(this.eventBusEl_, targetOrType, typeOrListener);\n\n // Targeting another evented object.\n } else {\n const target = targetOrType;\n const type = typeOrListener;\n\n // Fail fast and in a meaningful way!\n validateTarget(target, this, 'off');\n validateEventType(type, this, 'off');\n validateListener(listener, this, 'off');\n\n // Ensure there's at least a guid, even if the function hasn't been used\n listener = bind_(this, listener);\n\n // Remove the dispose listener on this evented object, which was given\n // the same guid as the event listener in on().\n this.off('dispose', listener);\n if (target.nodeName) {\n off(target, type, listener);\n off(target, 'dispose', listener);\n } else if (isEvented(target)) {\n target.off(type, listener);\n target.off('dispose', listener);\n }\n }\n },\n /**\n * Fire an event on this evented object, causing its listeners to be called.\n *\n * @param {string|Object} event\n * An event type or an object with a type property.\n *\n * @param {Object} [hash]\n * An additional object to pass along to listeners.\n *\n * @return {boolean}\n * Whether or not the default behavior was prevented.\n */\n trigger(event, hash) {\n validateTarget(this.eventBusEl_, this, 'trigger');\n const type = event && typeof event !== 'string' ? event.type : event;\n if (!isValidEventType(type)) {\n throw new Error(`Invalid event type for ${objName(this)}#trigger; ` + 'must be a non-empty string or object with a type key that has a non-empty value.');\n }\n return trigger(this.eventBusEl_, event, hash);\n }\n };\n\n /**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param {Object} target\n * The object to which to add event methods.\n *\n * @param {Object} [options={}]\n * Options for customizing the mixin behavior.\n *\n * @param {string} [options.eventBusKey]\n * By default, adds a `eventBusEl_` DOM element to the target object,\n * which is used as an event bus. If the target object already has a\n * DOM element that should be used, pass its key here.\n *\n * @return {Object}\n * The target object.\n */\n function evented(target, options = {}) {\n const {\n eventBusKey\n } = options;\n\n // Set or create the eventBusEl_.\n if (eventBusKey) {\n if (!target[eventBusKey].nodeName) {\n throw new Error(`The eventBusKey \"${eventBusKey}\" does not refer to an element.`);\n }\n target.eventBusEl_ = target[eventBusKey];\n } else {\n target.eventBusEl_ = createEl('span', {\n className: 'vjs-event-bus'\n });\n }\n Object.assign(target, EventedMixin);\n if (target.eventedCallbacks) {\n target.eventedCallbacks.forEach(callback => {\n callback();\n });\n }\n\n // When any evented object is disposed, it removes all its listeners.\n target.on('dispose', () => {\n target.off();\n [target, target.el_, target.eventBusEl_].forEach(function (val) {\n if (val && DomData.has(val)) {\n DomData.delete(val);\n }\n });\n window.setTimeout(() => {\n target.eventBusEl_ = null;\n }, 0);\n });\n return target;\n }\n\n /**\n * @file mixins/stateful.js\n * @module stateful\n */\n\n /**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\n const StatefulMixin = {\n /**\n * A hash containing arbitrary keys and values representing the state of\n * the object.\n *\n * @type {Object}\n */\n state: {},\n /**\n * Set the state of an object by mutating its\n * {@link module:stateful~StatefulMixin.state|state} object in place.\n *\n * @fires module:stateful~StatefulMixin#statechanged\n * @param {Object|Function} stateUpdates\n * A new set of properties to shallow-merge into the plugin state.\n * Can be a plain object or a function returning a plain object.\n *\n * @return {Object|undefined}\n * An object containing changes that occurred. If no changes\n * occurred, returns `undefined`.\n */\n setState(stateUpdates) {\n // Support providing the `stateUpdates` state as a function.\n if (typeof stateUpdates === 'function') {\n stateUpdates = stateUpdates();\n }\n let changes;\n each(stateUpdates, (value, key) => {\n // Record the change if the value is different from what's in the\n // current state.\n if (this.state[key] !== value) {\n changes = changes || {};\n changes[key] = {\n from: this.state[key],\n to: value\n };\n }\n this.state[key] = value;\n });\n\n // Only trigger \"statechange\" if there were changes AND we have a trigger\n // function. This allows us to not require that the target object be an\n // evented object.\n if (changes && isEvented(this)) {\n /**\n * An event triggered on an object that is both\n * {@link module:stateful|stateful} and {@link module:evented|evented}\n * indicating that its state has changed.\n *\n * @event module:stateful~StatefulMixin#statechanged\n * @type {Object}\n * @property {Object} changes\n * A hash containing the properties that were changed and\n * the values they were changed `from` and `to`.\n */\n this.trigger({\n changes,\n type: 'statechanged'\n });\n }\n return changes;\n }\n };\n\n /**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param {Object} target\n * The object to be made stateful.\n *\n * @param {Object} [defaultState]\n * A default set of properties to populate the newly-stateful object's\n * `state` property.\n *\n * @return {Object}\n * Returns the `target`.\n */\n function stateful(target, defaultState) {\n Object.assign(target, StatefulMixin);\n\n // This happens after the mixing-in because we need to replace the `state`\n // added in that step.\n target.state = Object.assign({}, target.state, defaultState);\n\n // Auto-bind the `handleStateChanged` method of the target object if it exists.\n if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n target.on('statechanged', target.handleStateChanged);\n }\n return target;\n }\n\n /**\n * @file str.js\n * @module to-lower-case\n */\n\n /**\n * Lowercase the first letter of a string.\n *\n * @param {string} string\n * String to be lowercased\n *\n * @return {string}\n * The string with a lowercased first letter\n */\n const toLowerCase = function (string) {\n if (typeof string !== 'string') {\n return string;\n }\n return string.replace(/./, w => w.toLowerCase());\n };\n\n /**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n * String to be uppercased\n *\n * @return {string}\n * The string with an uppercased first letter\n */\n const toTitleCase$1 = function (string) {\n if (typeof string !== 'string') {\n return string;\n }\n return string.replace(/./, w => w.toUpperCase());\n };\n\n /**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n * The first string to compare\n *\n * @param {string} str2\n * The second string to compare\n *\n * @return {boolean}\n * Whether the TitleCase versions of the strings are equal\n */\n const titleCaseEquals = function (str1, str2) {\n return toTitleCase$1(str1) === toTitleCase$1(str2);\n };\n\n var Str = /*#__PURE__*/Object.freeze({\n __proto__: null,\n toLowerCase: toLowerCase,\n toTitleCase: toTitleCase$1,\n titleCaseEquals: titleCaseEquals\n });\n\n var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\n function unwrapExports (x) {\n return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;\n }\n\n function createCommonjsModule(fn, module) {\n return module = { exports: {} }, fn(module, module.exports), module.exports;\n }\n\n var keycode = createCommonjsModule(function (module, exports) {\n // Source: http://jsfiddle.net/vWx8V/\n // http://stackoverflow.com/questions/5603195/full-list-of-javascript-keycodes\n\n /**\n * Conenience method returns corresponding value for given keyName or keyCode.\n *\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Mixed}\n * @api public\n */\n\n function keyCode(searchInput) {\n // Keyboard Events\n if (searchInput && 'object' === typeof searchInput) {\n var hasKeyCode = searchInput.which || searchInput.keyCode || searchInput.charCode;\n if (hasKeyCode) searchInput = hasKeyCode;\n }\n\n // Numbers\n if ('number' === typeof searchInput) return names[searchInput];\n\n // Everything else (cast to string)\n var search = String(searchInput);\n\n // check codes\n var foundNamedKey = codes[search.toLowerCase()];\n if (foundNamedKey) return foundNamedKey;\n\n // check aliases\n var foundNamedKey = aliases[search.toLowerCase()];\n if (foundNamedKey) return foundNamedKey;\n\n // weird character?\n if (search.length === 1) return search.charCodeAt(0);\n return undefined;\n }\n\n /**\n * Compares a keyboard event with a given keyCode or keyName.\n *\n * @param {Event} event Keyboard event that should be tested\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Boolean}\n * @api public\n */\n keyCode.isEventKey = function isEventKey(event, nameOrCode) {\n if (event && 'object' === typeof event) {\n var keyCode = event.which || event.keyCode || event.charCode;\n if (keyCode === null || keyCode === undefined) {\n return false;\n }\n if (typeof nameOrCode === 'string') {\n // check codes\n var foundNamedKey = codes[nameOrCode.toLowerCase()];\n if (foundNamedKey) {\n return foundNamedKey === keyCode;\n }\n\n // check aliases\n var foundNamedKey = aliases[nameOrCode.toLowerCase()];\n if (foundNamedKey) {\n return foundNamedKey === keyCode;\n }\n } else if (typeof nameOrCode === 'number') {\n return nameOrCode === keyCode;\n }\n return false;\n }\n };\n exports = module.exports = keyCode;\n\n /**\n * Get by name\n *\n * exports.code['enter'] // => 13\n */\n\n var codes = exports.code = exports.codes = {\n 'backspace': 8,\n 'tab': 9,\n 'enter': 13,\n 'shift': 16,\n 'ctrl': 17,\n 'alt': 18,\n 'pause/break': 19,\n 'caps lock': 20,\n 'esc': 27,\n 'space': 32,\n 'page up': 33,\n 'page down': 34,\n 'end': 35,\n 'home': 36,\n 'left': 37,\n 'up': 38,\n 'right': 39,\n 'down': 40,\n 'insert': 45,\n 'delete': 46,\n 'command': 91,\n 'left command': 91,\n 'right command': 93,\n 'numpad *': 106,\n 'numpad +': 107,\n 'numpad -': 109,\n 'numpad .': 110,\n 'numpad /': 111,\n 'num lock': 144,\n 'scroll lock': 145,\n 'my computer': 182,\n 'my calculator': 183,\n ';': 186,\n '=': 187,\n ',': 188,\n '-': 189,\n '.': 190,\n '/': 191,\n '`': 192,\n '[': 219,\n '\\\\': 220,\n ']': 221,\n \"'\": 222\n };\n\n // Helper aliases\n\n var aliases = exports.aliases = {\n 'windows': 91,\n '⇧': 16,\n '⌥': 18,\n '⌃': 17,\n '⌘': 91,\n 'ctl': 17,\n 'control': 17,\n 'option': 18,\n 'pause': 19,\n 'break': 19,\n 'caps': 20,\n 'return': 13,\n 'escape': 27,\n 'spc': 32,\n 'spacebar': 32,\n 'pgup': 33,\n 'pgdn': 34,\n 'ins': 45,\n 'del': 46,\n 'cmd': 91\n };\n\n /*!\n * Programatically add the following\n */\n\n // lower case chars\n for (i = 97; i < 123; i++) codes[String.fromCharCode(i)] = i - 32;\n\n // numbers\n for (var i = 48; i < 58; i++) codes[i - 48] = i;\n\n // function keys\n for (i = 1; i < 13; i++) codes['f' + i] = i + 111;\n\n // numpad keys\n for (i = 0; i < 10; i++) codes['numpad ' + i] = i + 96;\n\n /**\n * Get by code\n *\n * exports.name[13] // => 'Enter'\n */\n\n var names = exports.names = exports.title = {}; // title for backward compat\n\n // Create reverse mapping\n for (i in codes) names[codes[i]] = i;\n\n // Add aliases\n for (var alias in aliases) {\n codes[alias] = aliases[alias];\n }\n });\n keycode.code;\n keycode.codes;\n keycode.aliases;\n keycode.names;\n keycode.title;\n\n /**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n\n /**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n class Component$1 {\n /**\n * A callback that is called when a component is ready. Does not have any\n * parameters and any callback value will be ignored.\n *\n * @callback ReadyCallback\n * @this Component\n */\n\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of component options.\n *\n * @param {Object[]} [options.children]\n * An array of children objects to initialize this component with. Children objects have\n * a name property that will be used if more than one component of the same type needs to be\n * added.\n *\n * @param {string} [options.className]\n * A class or space separated list of classes to add the component\n *\n * @param {ReadyCallback} [ready]\n * Function that gets called when the `Component` is ready.\n */\n constructor(player, options, ready) {\n // The component might be the player itself and we can't pass `this` to super\n if (!player && this.play) {\n this.player_ = player = this; // eslint-disable-line\n } else {\n this.player_ = player;\n }\n this.isDisposed_ = false;\n\n // Hold the reference to the parent component via `addChild` method\n this.parentComponent_ = null;\n\n // Make a copy of prototype.options_ to protect against overriding defaults\n this.options_ = merge$2({}, this.options_);\n\n // Updated options with supplied options\n options = this.options_ = merge$2(this.options_, options);\n\n // Get ID from options or options element if one is supplied\n this.id_ = options.id || options.el && options.el.id;\n\n // If there was no ID from the options, generate one\n if (!this.id_) {\n // Don't require the player ID function in the case of mock players\n const id = player && player.id && player.id() || 'no_player';\n this.id_ = `${id}_component_${newGUID()}`;\n }\n this.name_ = options.name || null;\n\n // Create element if one wasn't provided in options\n if (options.el) {\n this.el_ = options.el;\n } else if (options.createEl !== false) {\n this.el_ = this.createEl();\n }\n if (options.className && this.el_) {\n options.className.split(' ').forEach(c => this.addClass(c));\n }\n\n // Remove the placeholder event methods. If the component is evented, the\n // real methods are added next\n ['on', 'off', 'one', 'any', 'trigger'].forEach(fn => {\n this[fn] = undefined;\n });\n\n // if evented is anything except false, we want to mixin in evented\n if (options.evented !== false) {\n // Make this an evented object and use `el_`, if available, as its event bus\n evented(this, {\n eventBusKey: this.el_ ? 'el_' : null\n });\n this.handleLanguagechange = this.handleLanguagechange.bind(this);\n this.on(this.player_, 'languagechange', this.handleLanguagechange);\n }\n stateful(this, this.constructor.defaultState);\n this.children_ = [];\n this.childIndex_ = {};\n this.childNameIndex_ = {};\n this.setTimeoutIds_ = new Set();\n this.setIntervalIds_ = new Set();\n this.rafIds_ = new Set();\n this.namedRafs_ = new Map();\n this.clearingTimersOnDispose_ = false;\n\n // Add any child components in options\n if (options.initChildren !== false) {\n this.initChildren();\n }\n\n // Don't want to trigger ready here or it will go before init is actually\n // finished for all children that run this constructor\n this.ready(ready);\n if (options.reportTouchActivity !== false) {\n this.enableTouchActivity();\n }\n }\n\n // `on`, `off`, `one`, `any` and `trigger` are here so tsc includes them in definitions.\n // They are replaced or removed in the constructor\n\n /**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to call with `EventTarget`s\n */\n on(type, fn) {}\n\n /**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to remove.\n */\n off(type, fn) {}\n\n /**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to be called once for each event name.\n */\n one(type, fn) {}\n\n /**\n * This function will add an `event listener` that gets triggered only once and is\n * removed from all events. This is like adding an array of `event listener`s\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on all events the\n * first time it is triggered.\n *\n * @param {string|string[]} type\n * An event name or an array of event names.\n *\n * @param {Function} fn\n * The function to be called once for each event name.\n */\n any(type, fn) {}\n\n /**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|Event|Object} event\n * The name of the event, an `Event`, or an object with a key of type set to\n * an event name.\n */\n trigger(event) {}\n\n /**\n * Dispose of the `Component` and all child components.\n *\n * @fires Component#dispose\n *\n * @param {Object} options\n * @param {Element} options.originalEl element with which to replace player element\n */\n dispose(options = {}) {\n // Bail out if the component has already been disposed.\n if (this.isDisposed_) {\n return;\n }\n if (this.readyQueue_) {\n this.readyQueue_.length = 0;\n }\n\n /**\n * Triggered when a `Component` is disposed.\n *\n * @event Component#dispose\n * @type {Event}\n *\n * @property {boolean} [bubbles=false]\n * set to false so that the dispose event does not\n * bubble up\n */\n this.trigger({\n type: 'dispose',\n bubbles: false\n });\n this.isDisposed_ = true;\n\n // Dispose all children.\n if (this.children_) {\n for (let i = this.children_.length - 1; i >= 0; i--) {\n if (this.children_[i].dispose) {\n this.children_[i].dispose();\n }\n }\n }\n\n // Delete child references\n this.children_ = null;\n this.childIndex_ = null;\n this.childNameIndex_ = null;\n this.parentComponent_ = null;\n if (this.el_) {\n // Remove element from DOM\n if (this.el_.parentNode) {\n if (options.restoreEl) {\n this.el_.parentNode.replaceChild(options.restoreEl, this.el_);\n } else {\n this.el_.parentNode.removeChild(this.el_);\n }\n }\n this.el_ = null;\n }\n\n // remove reference to the player after disposing of the element\n this.player_ = null;\n }\n\n /**\n * Determine whether or not this component has been disposed.\n *\n * @return {boolean}\n * If the component has been disposed, will be `true`. Otherwise, `false`.\n */\n isDisposed() {\n return Boolean(this.isDisposed_);\n }\n\n /**\n * Return the {@link Player} that the `Component` has attached to.\n *\n * @return { import('./player').default }\n * The player that this `Component` has attached to.\n */\n player() {\n return this.player_;\n }\n\n /**\n * Deep merge of options objects with new options.\n * > Note: When both `obj` and `options` contain properties whose values are objects.\n * The two properties get merged using {@link module:obj.merge}\n *\n * @param {Object} obj\n * The object that contains new options.\n *\n * @return {Object}\n * A new object of `this.options_` and `obj` merged together.\n */\n options(obj) {\n if (!obj) {\n return this.options_;\n }\n this.options_ = merge$2(this.options_, obj);\n return this.options_;\n }\n\n /**\n * Get the `Component`s DOM element\n *\n * @return {Element}\n * The DOM element for this `Component`.\n */\n el() {\n return this.el_;\n }\n\n /**\n * Create the `Component`s DOM element.\n *\n * @param {string} [tagName]\n * Element's DOM node type. e.g. 'div'\n *\n * @param {Object} [properties]\n * An object of properties that should be set.\n *\n * @param {Object} [attributes]\n * An object of attributes that should be set.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl(tagName, properties, attributes) {\n return createEl(tagName, properties, attributes);\n }\n\n /**\n * Localize a string given the string in english.\n *\n * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n *\n * If a `defaultValue` is provided, it'll use that over `string`,\n * if a value isn't found in provided language files.\n * This is useful if you want to have a descriptive key for token replacement\n * but have a succinct localized string and not require `en.json` to be included.\n *\n * Currently, it is used for the progress bar timing.\n * ```js\n * {\n * \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n * }\n * ```\n * It is then used like so:\n * ```js\n * this.localize('progress bar timing: currentTime={1} duration{2}',\n * [this.player_.currentTime(), this.player_.duration()],\n * '{1} of {2}');\n * ```\n *\n * Which outputs something like: `01:23 of 24:56`.\n *\n *\n * @param {string} string\n * The string to localize and the key to lookup in the language files.\n * @param {string[]} [tokens]\n * If the current item has token replacements, provide the tokens here.\n * @param {string} [defaultValue]\n * Defaults to `string`. Can be a default value to use for token replacement\n * if the lookup key is needed to be separate.\n *\n * @return {string}\n * The localized string or if no localization exists the english string.\n */\n localize(string, tokens, defaultValue = string) {\n const code = this.player_.language && this.player_.language();\n const languages = this.player_.languages && this.player_.languages();\n const language = languages && languages[code];\n const primaryCode = code && code.split('-')[0];\n const primaryLang = languages && languages[primaryCode];\n let localizedString = defaultValue;\n if (language && language[string]) {\n localizedString = language[string];\n } else if (primaryLang && primaryLang[string]) {\n localizedString = primaryLang[string];\n }\n if (tokens) {\n localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n const value = tokens[index - 1];\n let ret = value;\n if (typeof value === 'undefined') {\n ret = match;\n }\n return ret;\n });\n }\n return localizedString;\n }\n\n /**\n * Handles language change for the player in components. Should be overridden by sub-components.\n *\n * @abstract\n */\n handleLanguagechange() {}\n\n /**\n * Return the `Component`s DOM element. This is where children get inserted.\n * This will usually be the the same as the element returned in {@link Component#el}.\n *\n * @return {Element}\n * The content element for this `Component`.\n */\n contentEl() {\n return this.contentEl_ || this.el_;\n }\n\n /**\n * Get this `Component`s ID\n *\n * @return {string}\n * The id of this `Component`\n */\n id() {\n return this.id_;\n }\n\n /**\n * Get the `Component`s name. The name gets used to reference the `Component`\n * and is set during registration.\n *\n * @return {string}\n * The name of this `Component`.\n */\n name() {\n return this.name_;\n }\n\n /**\n * Get an array of all child components\n *\n * @return {Array}\n * The children\n */\n children() {\n return this.children_;\n }\n\n /**\n * Returns the child `Component` with the given `id`.\n *\n * @param {string} id\n * The id of the child `Component` to get.\n *\n * @return {Component|undefined}\n * The child `Component` with the given `id` or undefined.\n */\n getChildById(id) {\n return this.childIndex_[id];\n }\n\n /**\n * Returns the child `Component` with the given `name`.\n *\n * @param {string} name\n * The name of the child `Component` to get.\n *\n * @return {Component|undefined}\n * The child `Component` with the given `name` or undefined.\n */\n getChild(name) {\n if (!name) {\n return;\n }\n return this.childNameIndex_[name];\n }\n\n /**\n * Returns the descendant `Component` following the givent\n * descendant `names`. For instance ['foo', 'bar', 'baz'] would\n * try to get 'foo' on the current component, 'bar' on the 'foo'\n * component and 'baz' on the 'bar' component and return undefined\n * if any of those don't exist.\n *\n * @param {...string[]|...string} names\n * The name of the child `Component` to get.\n *\n * @return {Component|undefined}\n * The descendant `Component` following the given descendant\n * `names` or undefined.\n */\n getDescendant(...names) {\n // flatten array argument into the main array\n names = names.reduce((acc, n) => acc.concat(n), []);\n let currentChild = this;\n for (let i = 0; i < names.length; i++) {\n currentChild = currentChild.getChild(names[i]);\n if (!currentChild || !currentChild.getChild) {\n return;\n }\n }\n return currentChild;\n }\n\n /**\n * Add a child `Component` inside the current `Component`.\n *\n *\n * @param {string|Component} child\n * The name or instance of a child to add.\n *\n * @param {Object} [options={}]\n * The key/value store of options that will get passed to children of\n * the child.\n *\n * @param {number} [index=this.children_.length]\n * The index to attempt to add a child into.\n *\n * @return {Component}\n * The `Component` that gets added as a child. When using a string the\n * `Component` will get created by this process.\n */\n addChild(child, options = {}, index = this.children_.length) {\n let component;\n let componentName;\n\n // If child is a string, create component with options\n if (typeof child === 'string') {\n componentName = toTitleCase$1(child);\n const componentClassName = options.componentClass || componentName;\n\n // Set name through options\n options.name = componentName;\n\n // Create a new object & element for this controls set\n // If there's no .player_, this is a player\n const ComponentClass = Component$1.getComponent(componentClassName);\n if (!ComponentClass) {\n throw new Error(`Component ${componentClassName} does not exist`);\n }\n\n // data stored directly on the videojs object may be\n // misidentified as a component to retain\n // backwards-compatibility with 4.x. check to make sure the\n // component class can be instantiated.\n if (typeof ComponentClass !== 'function') {\n return null;\n }\n component = new ComponentClass(this.player_ || this, options);\n\n // child is a component instance\n } else {\n component = child;\n }\n if (component.parentComponent_) {\n component.parentComponent_.removeChild(component);\n }\n this.children_.splice(index, 0, component);\n component.parentComponent_ = this;\n if (typeof component.id === 'function') {\n this.childIndex_[component.id()] = component;\n }\n\n // If a name wasn't used to create the component, check if we can use the\n // name function of the component\n componentName = componentName || component.name && toTitleCase$1(component.name());\n if (componentName) {\n this.childNameIndex_[componentName] = component;\n this.childNameIndex_[toLowerCase(componentName)] = component;\n }\n\n // Add the UI object's element to the container div (box)\n // Having an element is not required\n if (typeof component.el === 'function' && component.el()) {\n // If inserting before a component, insert before that component's element\n let refNode = null;\n if (this.children_[index + 1]) {\n // Most children are components, but the video tech is an HTML element\n if (this.children_[index + 1].el_) {\n refNode = this.children_[index + 1].el_;\n } else if (isEl(this.children_[index + 1])) {\n refNode = this.children_[index + 1];\n }\n }\n this.contentEl().insertBefore(component.el(), refNode);\n }\n\n // Return so it can stored on parent object if desired.\n return component;\n }\n\n /**\n * Remove a child `Component` from this `Component`s list of children. Also removes\n * the child `Component`s element from this `Component`s element.\n *\n * @param {Component} component\n * The child `Component` to remove.\n */\n removeChild(component) {\n if (typeof component === 'string') {\n component = this.getChild(component);\n }\n if (!component || !this.children_) {\n return;\n }\n let childFound = false;\n for (let i = this.children_.length - 1; i >= 0; i--) {\n if (this.children_[i] === component) {\n childFound = true;\n this.children_.splice(i, 1);\n break;\n }\n }\n if (!childFound) {\n return;\n }\n component.parentComponent_ = null;\n this.childIndex_[component.id()] = null;\n this.childNameIndex_[toTitleCase$1(component.name())] = null;\n this.childNameIndex_[toLowerCase(component.name())] = null;\n const compEl = component.el();\n if (compEl && compEl.parentNode === this.contentEl()) {\n this.contentEl().removeChild(component.el());\n }\n }\n\n /**\n * Add and initialize default child `Component`s based upon options.\n */\n initChildren() {\n const children = this.options_.children;\n if (children) {\n // `this` is `parent`\n const parentOptions = this.options_;\n const handleAdd = child => {\n const name = child.name;\n let opts = child.opts;\n\n // Allow options for children to be set at the parent options\n // e.g. videojs(id, { controlBar: false });\n // instead of videojs(id, { children: { controlBar: false });\n if (parentOptions[name] !== undefined) {\n opts = parentOptions[name];\n }\n\n // Allow for disabling default components\n // e.g. options['children']['posterImage'] = false\n if (opts === false) {\n return;\n }\n\n // Allow options to be passed as a simple boolean if no configuration\n // is necessary.\n if (opts === true) {\n opts = {};\n }\n\n // We also want to pass the original player options\n // to each component as well so they don't need to\n // reach back into the player for options later.\n opts.playerOptions = this.options_.playerOptions;\n\n // Create and add the child component.\n // Add a direct reference to the child by name on the parent instance.\n // If two of the same component are used, different names should be supplied\n // for each\n const newChild = this.addChild(name, opts);\n if (newChild) {\n this[name] = newChild;\n }\n };\n\n // Allow for an array of children details to passed in the options\n let workingChildren;\n const Tech = Component$1.getComponent('Tech');\n if (Array.isArray(children)) {\n workingChildren = children;\n } else {\n workingChildren = Object.keys(children);\n }\n workingChildren\n // children that are in this.options_ but also in workingChildren would\n // give us extra children we do not want. So, we want to filter them out.\n .concat(Object.keys(this.options_).filter(function (child) {\n return !workingChildren.some(function (wchild) {\n if (typeof wchild === 'string') {\n return child === wchild;\n }\n return child === wchild.name;\n });\n })).map(child => {\n let name;\n let opts;\n if (typeof child === 'string') {\n name = child;\n opts = children[name] || this.options_[name] || {};\n } else {\n name = child.name;\n opts = child;\n }\n return {\n name,\n opts\n };\n }).filter(child => {\n // we have to make sure that child.name isn't in the techOrder since\n // techs are registered as Components but can't aren't compatible\n // See https://github.com/videojs/video.js/issues/2772\n const c = Component$1.getComponent(child.opts.componentClass || toTitleCase$1(child.name));\n return c && !Tech.isTech(c);\n }).forEach(handleAdd);\n }\n }\n\n /**\n * Builds the default DOM class name. Should be overridden by sub-components.\n *\n * @return {string}\n * The DOM class name for this object.\n *\n * @abstract\n */\n buildCSSClass() {\n // Child classes can include a function that does:\n // return 'CLASS NAME' + this._super();\n return '';\n }\n\n /**\n * Bind a listener to the component's ready state.\n * Different from event listeners in that if the ready event has already happened\n * it will trigger the function immediately.\n *\n * @param {ReadyCallback} fn\n * Function that gets called when the `Component` is ready.\n *\n * @return {Component}\n * Returns itself; method can be chained.\n */\n ready(fn, sync = false) {\n if (!fn) {\n return;\n }\n if (!this.isReady_) {\n this.readyQueue_ = this.readyQueue_ || [];\n this.readyQueue_.push(fn);\n return;\n }\n if (sync) {\n fn.call(this);\n } else {\n // Call the function asynchronously by default for consistency\n this.setTimeout(fn, 1);\n }\n }\n\n /**\n * Trigger all the ready listeners for this `Component`.\n *\n * @fires Component#ready\n */\n triggerReady() {\n this.isReady_ = true;\n\n // Ensure ready is triggered asynchronously\n this.setTimeout(function () {\n const readyQueue = this.readyQueue_;\n\n // Reset Ready Queue\n this.readyQueue_ = [];\n if (readyQueue && readyQueue.length > 0) {\n readyQueue.forEach(function (fn) {\n fn.call(this);\n }, this);\n }\n\n // Allow for using event listeners also\n /**\n * Triggered when a `Component` is ready.\n *\n * @event Component#ready\n * @type {Event}\n */\n this.trigger('ready');\n }, 1);\n }\n\n /**\n * Find a single DOM element matching a `selector`. This can be within the `Component`s\n * `contentEl()` or another custom context.\n *\n * @param {string} selector\n * A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param {Element|string} [context=this.contentEl()]\n * A DOM element within which to query. Can also be a selector string in\n * which case the first matching element will get used as context. If\n * missing `this.contentEl()` gets used. If `this.contentEl()` returns\n * nothing it falls back to `document`.\n *\n * @return {Element|null}\n * the dom element that was found, or null\n *\n * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n */\n $(selector, context) {\n return $(selector, context || this.contentEl());\n }\n\n /**\n * Finds all DOM element matching a `selector`. This can be within the `Component`s\n * `contentEl()` or another custom context.\n *\n * @param {string} selector\n * A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param {Element|string} [context=this.contentEl()]\n * A DOM element within which to query. Can also be a selector string in\n * which case the first matching element will get used as context. If\n * missing `this.contentEl()` gets used. If `this.contentEl()` returns\n * nothing it falls back to `document`.\n *\n * @return {NodeList}\n * a list of dom elements that were found\n *\n * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n */\n $$(selector, context) {\n return $$(selector, context || this.contentEl());\n }\n\n /**\n * Check if a component's element has a CSS class name.\n *\n * @param {string} classToCheck\n * CSS class name to check.\n *\n * @return {boolean}\n * - True if the `Component` has the class.\n * - False if the `Component` does not have the class`\n */\n hasClass(classToCheck) {\n return hasClass(this.el_, classToCheck);\n }\n\n /**\n * Add a CSS class name to the `Component`s element.\n *\n * @param {...string} classesToAdd\n * One or more CSS class name to add.\n */\n addClass(...classesToAdd) {\n addClass(this.el_, ...classesToAdd);\n }\n\n /**\n * Remove a CSS class name from the `Component`s element.\n *\n * @param {...string} classesToRemove\n * One or more CSS class name to remove.\n */\n removeClass(...classesToRemove) {\n removeClass(this.el_, ...classesToRemove);\n }\n\n /**\n * Add or remove a CSS class name from the component's element.\n * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n *\n * @param {string} classToToggle\n * The class to add or remove based on (@link Component#hasClass}\n *\n * @param {boolean|Dom~predicate} [predicate]\n * An {@link Dom~predicate} function or a boolean\n */\n toggleClass(classToToggle, predicate) {\n toggleClass(this.el_, classToToggle, predicate);\n }\n\n /**\n * Show the `Component`s element if it is hidden by removing the\n * 'vjs-hidden' class name from it.\n */\n show() {\n this.removeClass('vjs-hidden');\n }\n\n /**\n * Hide the `Component`s element if it is currently showing by adding the\n * 'vjs-hidden` class name to it.\n */\n hide() {\n this.addClass('vjs-hidden');\n }\n\n /**\n * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n * class name to it. Used during fadeIn/fadeOut.\n *\n * @private\n */\n lockShowing() {\n this.addClass('vjs-lock-showing');\n }\n\n /**\n * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n * class name from it. Used during fadeIn/fadeOut.\n *\n * @private\n */\n unlockShowing() {\n this.removeClass('vjs-lock-showing');\n }\n\n /**\n * Get the value of an attribute on the `Component`s element.\n *\n * @param {string} attribute\n * Name of the attribute to get the value from.\n *\n * @return {string|null}\n * - The value of the attribute that was asked for.\n * - Can be an empty string on some browsers if the attribute does not exist\n * or has no value\n * - Most browsers will return null if the attribute does not exist or has\n * no value.\n *\n * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n */\n getAttribute(attribute) {\n return getAttribute(this.el_, attribute);\n }\n\n /**\n * Set the value of an attribute on the `Component`'s element\n *\n * @param {string} attribute\n * Name of the attribute to set.\n *\n * @param {string} value\n * Value to set the attribute to.\n *\n * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n */\n setAttribute(attribute, value) {\n setAttribute(this.el_, attribute, value);\n }\n\n /**\n * Remove an attribute from the `Component`s element.\n *\n * @param {string} attribute\n * Name of the attribute to remove.\n *\n * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n */\n removeAttribute(attribute) {\n removeAttribute(this.el_, attribute);\n }\n\n /**\n * Get or set the width of the component based upon the CSS styles.\n * See {@link Component#dimension} for more detailed information.\n *\n * @param {number|string} [num]\n * The width that you want to set postfixed with '%', 'px' or nothing.\n *\n * @param {boolean} [skipListeners]\n * Skip the componentresize event trigger\n *\n * @return {number|string}\n * The width when getting, zero if there is no width. Can be a string\n * postpixed with '%' or 'px'.\n */\n width(num, skipListeners) {\n return this.dimension('width', num, skipListeners);\n }\n\n /**\n * Get or set the height of the component based upon the CSS styles.\n * See {@link Component#dimension} for more detailed information.\n *\n * @param {number|string} [num]\n * The height that you want to set postfixed with '%', 'px' or nothing.\n *\n * @param {boolean} [skipListeners]\n * Skip the componentresize event trigger\n *\n * @return {number|string}\n * The width when getting, zero if there is no width. Can be a string\n * postpixed with '%' or 'px'.\n */\n height(num, skipListeners) {\n return this.dimension('height', num, skipListeners);\n }\n\n /**\n * Set both the width and height of the `Component` element at the same time.\n *\n * @param {number|string} width\n * Width to set the `Component`s element to.\n *\n * @param {number|string} height\n * Height to set the `Component`s element to.\n */\n dimensions(width, height) {\n // Skip componentresize listeners on width for optimization\n this.width(width, true);\n this.height(height);\n }\n\n /**\n * Get or set width or height of the `Component` element. This is the shared code\n * for the {@link Component#width} and {@link Component#height}.\n *\n * Things to know:\n * - If the width or height in an number this will return the number postfixed with 'px'.\n * - If the width/height is a percent this will return the percent postfixed with '%'\n * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n * defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n * See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n * for more information\n * - If you want the computed style of the component, use {@link Component#currentWidth}\n * and {@link {Component#currentHeight}\n *\n * @fires Component#componentresize\n *\n * @param {string} widthOrHeight\n 8 'width' or 'height'\n *\n * @param {number|string} [num]\n 8 New dimension\n *\n * @param {boolean} [skipListeners]\n * Skip componentresize event trigger\n *\n * @return {number}\n * The dimension when getting or 0 if unset\n */\n dimension(widthOrHeight, num, skipListeners) {\n if (num !== undefined) {\n // Set to zero if null or literally NaN (NaN !== NaN)\n if (num === null || num !== num) {\n num = 0;\n }\n\n // Check if using css width/height (% or px) and adjust\n if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n this.el_.style[widthOrHeight] = num;\n } else if (num === 'auto') {\n this.el_.style[widthOrHeight] = '';\n } else {\n this.el_.style[widthOrHeight] = num + 'px';\n }\n\n // skipListeners allows us to avoid triggering the resize event when setting both width and height\n if (!skipListeners) {\n /**\n * Triggered when a component is resized.\n *\n * @event Component#componentresize\n * @type {Event}\n */\n this.trigger('componentresize');\n }\n return;\n }\n\n // Not setting a value, so getting it\n // Make sure element exists\n if (!this.el_) {\n return 0;\n }\n\n // Get dimension value from style\n const val = this.el_.style[widthOrHeight];\n const pxIndex = val.indexOf('px');\n if (pxIndex !== -1) {\n // Return the pixel value with no 'px'\n return parseInt(val.slice(0, pxIndex), 10);\n }\n\n // No px so using % or no style was set, so falling back to offsetWidth/height\n // If component has display:none, offset will return 0\n // TODO: handle display:none and no dimension style using px\n return parseInt(this.el_['offset' + toTitleCase$1(widthOrHeight)], 10);\n }\n\n /**\n * Get the computed width or the height of the component's element.\n *\n * Uses `window.getComputedStyle`.\n *\n * @param {string} widthOrHeight\n * A string containing 'width' or 'height'. Whichever one you want to get.\n *\n * @return {number}\n * The dimension that gets asked for or 0 if nothing was set\n * for that dimension.\n */\n currentDimension(widthOrHeight) {\n let computedWidthOrHeight = 0;\n if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n throw new Error('currentDimension only accepts width or height value');\n }\n computedWidthOrHeight = computedStyle(this.el_, widthOrHeight);\n\n // remove 'px' from variable and parse as integer\n computedWidthOrHeight = parseFloat(computedWidthOrHeight);\n\n // if the computed value is still 0, it's possible that the browser is lying\n // and we want to check the offset values.\n // This code also runs wherever getComputedStyle doesn't exist.\n if (computedWidthOrHeight === 0 || isNaN(computedWidthOrHeight)) {\n const rule = `offset${toTitleCase$1(widthOrHeight)}`;\n computedWidthOrHeight = this.el_[rule];\n }\n return computedWidthOrHeight;\n }\n\n /**\n * An object that contains width and height values of the `Component`s\n * computed style. Uses `window.getComputedStyle`.\n *\n * @typedef {Object} Component~DimensionObject\n *\n * @property {number} width\n * The width of the `Component`s computed style.\n *\n * @property {number} height\n * The height of the `Component`s computed style.\n */\n\n /**\n * Get an object that contains computed width and height values of the\n * component's element.\n *\n * Uses `window.getComputedStyle`.\n *\n * @return {Component~DimensionObject}\n * The computed dimensions of the component's element.\n */\n currentDimensions() {\n return {\n width: this.currentDimension('width'),\n height: this.currentDimension('height')\n };\n }\n\n /**\n * Get the computed width of the component's element.\n *\n * Uses `window.getComputedStyle`.\n *\n * @return {number}\n * The computed width of the component's element.\n */\n currentWidth() {\n return this.currentDimension('width');\n }\n\n /**\n * Get the computed height of the component's element.\n *\n * Uses `window.getComputedStyle`.\n *\n * @return {number}\n * The computed height of the component's element.\n */\n currentHeight() {\n return this.currentDimension('height');\n }\n\n /**\n * Set the focus to this component\n */\n focus() {\n this.el_.focus();\n }\n\n /**\n * Remove the focus from this component\n */\n blur() {\n this.el_.blur();\n }\n\n /**\n * When this Component receives a `keydown` event which it does not process,\n * it passes the event to the Player for handling.\n *\n * @param {KeyboardEvent} event\n * The `keydown` event that caused this function to be called.\n */\n handleKeyDown(event) {\n if (this.player_) {\n // We only stop propagation here because we want unhandled events to fall\n // back to the browser. Exclude Tab for focus trapping.\n if (!keycode.isEventKey(event, 'Tab')) {\n event.stopPropagation();\n }\n this.player_.handleKeyDown(event);\n }\n }\n\n /**\n * Many components used to have a `handleKeyPress` method, which was poorly\n * named because it listened to a `keydown` event. This method name now\n * delegates to `handleKeyDown`. This means anyone calling `handleKeyPress`\n * will not see their method calls stop working.\n *\n * @param {Event} event\n * The event that caused this function to be called.\n */\n handleKeyPress(event) {\n this.handleKeyDown(event);\n }\n\n /**\n * Emit a 'tap' events when touch event support gets detected. This gets used to\n * support toggling the controls through a tap on the video. They get enabled\n * because every sub-component would have extra overhead otherwise.\n *\n * @private\n * @fires Component#tap\n * @listens Component#touchstart\n * @listens Component#touchmove\n * @listens Component#touchleave\n * @listens Component#touchcancel\n * @listens Component#touchend\n */\n emitTapEvents() {\n // Track the start time so we can determine how long the touch lasted\n let touchStart = 0;\n let firstTouch = null;\n\n // Maximum movement allowed during a touch event to still be considered a tap\n // Other popular libs use anywhere from 2 (hammer.js) to 15,\n // so 10 seems like a nice, round number.\n const tapMovementThreshold = 10;\n\n // The maximum length a touch can be while still being considered a tap\n const touchTimeThreshold = 200;\n let couldBeTap;\n this.on('touchstart', function (event) {\n // If more than one finger, don't consider treating this as a click\n if (event.touches.length === 1) {\n // Copy pageX/pageY from the object\n firstTouch = {\n pageX: event.touches[0].pageX,\n pageY: event.touches[0].pageY\n };\n // Record start time so we can detect a tap vs. \"touch and hold\"\n touchStart = window.performance.now();\n // Reset couldBeTap tracking\n couldBeTap = true;\n }\n });\n this.on('touchmove', function (event) {\n // If more than one finger, don't consider treating this as a click\n if (event.touches.length > 1) {\n couldBeTap = false;\n } else if (firstTouch) {\n // Some devices will throw touchmoves for all but the slightest of taps.\n // So, if we moved only a small distance, this could still be a tap\n const xdiff = event.touches[0].pageX - firstTouch.pageX;\n const ydiff = event.touches[0].pageY - firstTouch.pageY;\n const touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n if (touchDistance > tapMovementThreshold) {\n couldBeTap = false;\n }\n }\n });\n const noTap = function () {\n couldBeTap = false;\n };\n\n // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n this.on('touchleave', noTap);\n this.on('touchcancel', noTap);\n\n // When the touch ends, measure how long it took and trigger the appropriate\n // event\n this.on('touchend', function (event) {\n firstTouch = null;\n // Proceed only if the touchmove/leave/cancel event didn't happen\n if (couldBeTap === true) {\n // Measure how long the touch lasted\n const touchTime = window.performance.now() - touchStart;\n\n // Make sure the touch was less than the threshold to be considered a tap\n if (touchTime < touchTimeThreshold) {\n // Don't let browser turn this into a click\n event.preventDefault();\n /**\n * Triggered when a `Component` is tapped.\n *\n * @event Component#tap\n * @type {MouseEvent}\n */\n this.trigger('tap');\n // It may be good to copy the touchend event object and change the\n // type to tap, if the other event properties aren't exact after\n // Events.fixEvent runs (e.g. event.target)\n }\n }\n });\n }\n\n /**\n * This function reports user activity whenever touch events happen. This can get\n * turned off by any sub-components that wants touch events to act another way.\n *\n * Report user touch activity when touch events occur. User activity gets used to\n * determine when controls should show/hide. It is simple when it comes to mouse\n * events, because any mouse event should show the controls. So we capture mouse\n * events that bubble up to the player and report activity when that happens.\n * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n * controls. So touch events can't help us at the player level either.\n *\n * User activity gets checked asynchronously. So what could happen is a tap event\n * on the video turns the controls off. Then the `touchend` event bubbles up to\n * the player. Which, if it reported user activity, would turn the controls right\n * back on. We also don't want to completely block touch events from bubbling up.\n * Furthermore a `touchmove` event and anything other than a tap, should not turn\n * controls back on.\n *\n * @listens Component#touchstart\n * @listens Component#touchmove\n * @listens Component#touchend\n * @listens Component#touchcancel\n */\n enableTouchActivity() {\n // Don't continue if the root player doesn't support reporting user activity\n if (!this.player() || !this.player().reportUserActivity) {\n return;\n }\n\n // listener for reporting that the user is active\n const report = bind_(this.player(), this.player().reportUserActivity);\n let touchHolding;\n this.on('touchstart', function () {\n report();\n // For as long as the they are touching the device or have their mouse down,\n // we consider them active even if they're not moving their finger or mouse.\n // So we want to continue to update that they are active\n this.clearInterval(touchHolding);\n // report at the same interval as activityCheck\n touchHolding = this.setInterval(report, 250);\n });\n const touchEnd = function (event) {\n report();\n // stop the interval that maintains activity if the touch is holding\n this.clearInterval(touchHolding);\n };\n this.on('touchmove', report);\n this.on('touchend', touchEnd);\n this.on('touchcancel', touchEnd);\n }\n\n /**\n * A callback that has no parameters and is bound into `Component`s context.\n *\n * @callback Component~GenericCallback\n * @this Component\n */\n\n /**\n * Creates a function that runs after an `x` millisecond timeout. This function is a\n * wrapper around `window.setTimeout`. There are a few reasons to use this one\n * instead though:\n * 1. It gets cleared via {@link Component#clearTimeout} when\n * {@link Component#dispose} gets called.\n * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n *\n * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n * will cause its dispose listener not to get cleaned up! Please use\n * {@link Component#clearTimeout} or {@link Component#dispose} instead.\n *\n * @param {Component~GenericCallback} fn\n * The function that will be run after `timeout`.\n *\n * @param {number} timeout\n * Timeout in milliseconds to delay before executing the specified function.\n *\n * @return {number}\n * Returns a timeout ID that gets used to identify the timeout. It can also\n * get used in {@link Component#clearTimeout} to clear the timeout that\n * was set.\n *\n * @listens Component#dispose\n * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n */\n setTimeout(fn, timeout) {\n // declare as variables so they are properly available in timeout function\n // eslint-disable-next-line\n var timeoutId;\n fn = bind_(this, fn);\n this.clearTimersOnDispose_();\n timeoutId = window.setTimeout(() => {\n if (this.setTimeoutIds_.has(timeoutId)) {\n this.setTimeoutIds_.delete(timeoutId);\n }\n fn();\n }, timeout);\n this.setTimeoutIds_.add(timeoutId);\n return timeoutId;\n }\n\n /**\n * Clears a timeout that gets created via `window.setTimeout` or\n * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n * use this function instead of `window.clearTimout`. If you don't your dispose\n * listener will not get cleaned up until {@link Component#dispose}!\n *\n * @param {number} timeoutId\n * The id of the timeout to clear. The return value of\n * {@link Component#setTimeout} or `window.setTimeout`.\n *\n * @return {number}\n * Returns the timeout id that was cleared.\n *\n * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n */\n clearTimeout(timeoutId) {\n if (this.setTimeoutIds_.has(timeoutId)) {\n this.setTimeoutIds_.delete(timeoutId);\n window.clearTimeout(timeoutId);\n }\n return timeoutId;\n }\n\n /**\n * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n * around `window.setInterval`. There are a few reasons to use this one instead though.\n * 1. It gets cleared via {@link Component#clearInterval} when\n * {@link Component#dispose} gets called.\n * 2. The function callback will be a {@link Component~GenericCallback}\n *\n * @param {Component~GenericCallback} fn\n * The function to run every `x` seconds.\n *\n * @param {number} interval\n * Execute the specified function every `x` milliseconds.\n *\n * @return {number}\n * Returns an id that can be used to identify the interval. It can also be be used in\n * {@link Component#clearInterval} to clear the interval.\n *\n * @listens Component#dispose\n * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n */\n setInterval(fn, interval) {\n fn = bind_(this, fn);\n this.clearTimersOnDispose_();\n const intervalId = window.setInterval(fn, interval);\n this.setIntervalIds_.add(intervalId);\n return intervalId;\n }\n\n /**\n * Clears an interval that gets created via `window.setInterval` or\n * {@link Component#setInterval}. If you set an interval via {@link Component#setInterval}\n * use this function instead of `window.clearInterval`. If you don't your dispose\n * listener will not get cleaned up until {@link Component#dispose}!\n *\n * @param {number} intervalId\n * The id of the interval to clear. The return value of\n * {@link Component#setInterval} or `window.setInterval`.\n *\n * @return {number}\n * Returns the interval id that was cleared.\n *\n * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n */\n clearInterval(intervalId) {\n if (this.setIntervalIds_.has(intervalId)) {\n this.setIntervalIds_.delete(intervalId);\n window.clearInterval(intervalId);\n }\n return intervalId;\n }\n\n /**\n * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n * with a few extra bonuses:\n *\n * - Supports browsers that do not support rAF by falling back to\n * {@link Component#setTimeout}.\n *\n * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n * bound to the component).\n *\n * - Automatic cancellation of the rAF callback is handled if the component\n * is disposed before it is called.\n *\n * @param {Component~GenericCallback} fn\n * A function that will be bound to this component and executed just\n * before the browser's next repaint.\n *\n * @return {number}\n * Returns an rAF ID that gets used to identify the timeout. It can\n * also be used in {@link Component#cancelAnimationFrame} to cancel\n * the animation frame callback.\n *\n * @listens Component#dispose\n * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n */\n requestAnimationFrame(fn) {\n this.clearTimersOnDispose_();\n\n // declare as variables so they are properly available in rAF function\n // eslint-disable-next-line\n var id;\n fn = bind_(this, fn);\n id = window.requestAnimationFrame(() => {\n if (this.rafIds_.has(id)) {\n this.rafIds_.delete(id);\n }\n fn();\n });\n this.rafIds_.add(id);\n return id;\n }\n\n /**\n * Request an animation frame, but only one named animation\n * frame will be queued. Another will never be added until\n * the previous one finishes.\n *\n * @param {string} name\n * The name to give this requestAnimationFrame\n *\n * @param {Component~GenericCallback} fn\n * A function that will be bound to this component and executed just\n * before the browser's next repaint.\n */\n requestNamedAnimationFrame(name, fn) {\n if (this.namedRafs_.has(name)) {\n return;\n }\n this.clearTimersOnDispose_();\n fn = bind_(this, fn);\n const id = this.requestAnimationFrame(() => {\n fn();\n if (this.namedRafs_.has(name)) {\n this.namedRafs_.delete(name);\n }\n });\n this.namedRafs_.set(name, id);\n return name;\n }\n\n /**\n * Cancels a current named animation frame if it exists.\n *\n * @param {string} name\n * The name of the requestAnimationFrame to cancel.\n */\n cancelNamedAnimationFrame(name) {\n if (!this.namedRafs_.has(name)) {\n return;\n }\n this.cancelAnimationFrame(this.namedRafs_.get(name));\n this.namedRafs_.delete(name);\n }\n\n /**\n * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n * (rAF).\n *\n * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n * use this function instead of `window.cancelAnimationFrame`. If you don't,\n * your dispose listener will not get cleaned up until {@link Component#dispose}!\n *\n * @param {number} id\n * The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n *\n * @return {number}\n * Returns the rAF ID that was cleared.\n *\n * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n */\n cancelAnimationFrame(id) {\n if (this.rafIds_.has(id)) {\n this.rafIds_.delete(id);\n window.cancelAnimationFrame(id);\n }\n return id;\n }\n\n /**\n * A function to setup `requestAnimationFrame`, `setTimeout`,\n * and `setInterval`, clearing on dispose.\n *\n * > Previously each timer added and removed dispose listeners on it's own.\n * For better performance it was decided to batch them all, and use `Set`s\n * to track outstanding timer ids.\n *\n * @private\n */\n clearTimersOnDispose_() {\n if (this.clearingTimersOnDispose_) {\n return;\n }\n this.clearingTimersOnDispose_ = true;\n this.one('dispose', () => {\n [['namedRafs_', 'cancelNamedAnimationFrame'], ['rafIds_', 'cancelAnimationFrame'], ['setTimeoutIds_', 'clearTimeout'], ['setIntervalIds_', 'clearInterval']].forEach(([idName, cancelName]) => {\n // for a `Set` key will actually be the value again\n // so forEach((val, val) =>` but for maps we want to use\n // the key.\n this[idName].forEach((val, key) => this[cancelName](key));\n });\n this.clearingTimersOnDispose_ = false;\n });\n }\n\n /**\n * Register a `Component` with `videojs` given the name and the component.\n *\n * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n * should be registered using {@link Tech.registerTech} or\n * {@link videojs:videojs.registerTech}.\n *\n * > NOTE: This function can also be seen on videojs as\n * {@link videojs:videojs.registerComponent}.\n *\n * @param {string} name\n * The name of the `Component` to register.\n *\n * @param {Component} ComponentToRegister\n * The `Component` class to register.\n *\n * @return {Component}\n * The `Component` that was registered.\n */\n static registerComponent(name, ComponentToRegister) {\n if (typeof name !== 'string' || !name) {\n throw new Error(`Illegal component name, \"${name}\"; must be a non-empty string.`);\n }\n const Tech = Component$1.getComponent('Tech');\n\n // We need to make sure this check is only done if Tech has been registered.\n const isTech = Tech && Tech.isTech(ComponentToRegister);\n const isComp = Component$1 === ComponentToRegister || Component$1.prototype.isPrototypeOf(ComponentToRegister.prototype);\n if (isTech || !isComp) {\n let reason;\n if (isTech) {\n reason = 'techs must be registered using Tech.registerTech()';\n } else {\n reason = 'must be a Component subclass';\n }\n throw new Error(`Illegal component, \"${name}\"; ${reason}.`);\n }\n name = toTitleCase$1(name);\n if (!Component$1.components_) {\n Component$1.components_ = {};\n }\n const Player = Component$1.getComponent('Player');\n if (name === 'Player' && Player && Player.players) {\n const players = Player.players;\n const playerNames = Object.keys(players);\n\n // If we have players that were disposed, then their name will still be\n // in Players.players. So, we must loop through and verify that the value\n // for each item is not null. This allows registration of the Player component\n // after all players have been disposed or before any were created.\n if (players && playerNames.length > 0 && playerNames.map(pname => players[pname]).every(Boolean)) {\n throw new Error('Can not register Player component after player has been created.');\n }\n }\n Component$1.components_[name] = ComponentToRegister;\n Component$1.components_[toLowerCase(name)] = ComponentToRegister;\n return ComponentToRegister;\n }\n\n /**\n * Get a `Component` based on the name it was registered with.\n *\n * @param {string} name\n * The Name of the component to get.\n *\n * @return {Component}\n * The `Component` that got registered under the given name.\n */\n static getComponent(name) {\n if (!name || !Component$1.components_) {\n return;\n }\n return Component$1.components_[name];\n }\n }\n Component$1.registerComponent('Component', Component$1);\n\n /**\n * @file time.js\n * @module time\n */\n\n /**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @typedef {Function} TimeRangeIndex\n *\n * @param {number} [index=0]\n * The range number to return the time for.\n *\n * @return {number}\n * The time offset at the specified index.\n *\n * @deprecated The index argument must be provided.\n * In the future, leaving it out will throw an error.\n */\n\n /**\n * An object that contains ranges of time, which mimics {@link TimeRanges}.\n *\n * @typedef {Object} TimeRange\n *\n * @property {number} length\n * The number of time ranges represented by this object.\n *\n * @property {module:time~TimeRangeIndex} start\n * Returns the time offset at which a specified time range begins.\n *\n * @property {module:time~TimeRangeIndex} end\n * Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n /**\n * Check if any of the time ranges are over the maximum index.\n *\n * @private\n * @param {string} fnName\n * The function name to use for logging\n *\n * @param {number} index\n * The index to check\n *\n * @param {number} maxIndex\n * The maximum possible index\n *\n * @throws {Error} if the timeRanges provided are over the maxIndex\n */\n function rangeCheck(fnName, index, maxIndex) {\n if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n throw new Error(`Failed to execute '${fnName}' on 'TimeRanges': The index provided (${index}) is non-numeric or out of bounds (0-${maxIndex}).`);\n }\n }\n\n /**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @private\n * @param {string} fnName\n * The function name to use for logging\n *\n * @param {string} valueIndex\n * The property that should be used to get the time. should be\n * 'start' or 'end'\n *\n * @param {Array} ranges\n * An array of time ranges\n *\n * @param {Array} [rangeIndex=0]\n * The index to start the search at\n *\n * @return {number}\n * The time that offset at the specified index.\n *\n * @deprecated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws {Error} if rangeIndex is more than the length of ranges\n */\n function getRange(fnName, valueIndex, ranges, rangeIndex) {\n rangeCheck(fnName, rangeIndex, ranges.length - 1);\n return ranges[rangeIndex][valueIndex];\n }\n\n /**\n * Create a time range object given ranges of time.\n *\n * @private\n * @param {Array} [ranges]\n * An array of time ranges.\n *\n * @return {TimeRange}\n */\n function createTimeRangesObj(ranges) {\n let timeRangesObj;\n if (ranges === undefined || ranges.length === 0) {\n timeRangesObj = {\n length: 0,\n start() {\n throw new Error('This TimeRanges object is empty');\n },\n end() {\n throw new Error('This TimeRanges object is empty');\n }\n };\n } else {\n timeRangesObj = {\n length: ranges.length,\n start: getRange.bind(null, 'start', 0, ranges),\n end: getRange.bind(null, 'end', 1, ranges)\n };\n }\n if (window.Symbol && window.Symbol.iterator) {\n timeRangesObj[window.Symbol.iterator] = () => (ranges || []).values();\n }\n return timeRangesObj;\n }\n\n /**\n * Create a `TimeRange` object which mimics an\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.\n *\n * @param {number|Array[]} start\n * The start of a single range (a number) or an array of ranges (an\n * array of arrays of two numbers each).\n *\n * @param {number} end\n * The end of a single range. Cannot be used with the array form of\n * the `start` argument.\n *\n * @return {TimeRange}\n */\n function createTimeRanges$1(start, end) {\n if (Array.isArray(start)) {\n return createTimeRangesObj(start);\n } else if (start === undefined || end === undefined) {\n return createTimeRangesObj();\n }\n return createTimeRangesObj([[start, end]]);\n }\n\n /**\n * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in\n * seconds) will force a number of leading zeros to cover the length of the\n * guide.\n *\n * @private\n * @param {number} seconds\n * Number of seconds to be turned into a string\n *\n * @param {number} guide\n * Number (in seconds) to model the string after\n *\n * @return {string}\n * Time formatted as H:MM:SS or M:SS\n */\n const defaultImplementation = function (seconds, guide) {\n seconds = seconds < 0 ? 0 : seconds;\n let s = Math.floor(seconds % 60);\n let m = Math.floor(seconds / 60 % 60);\n let h = Math.floor(seconds / 3600);\n const gm = Math.floor(guide / 60 % 60);\n const gh = Math.floor(guide / 3600);\n\n // handle invalid times\n if (isNaN(seconds) || seconds === Infinity) {\n // '-' is false for all relational operators (e.g. <, >=) so this setting\n // will add the minimum number of fields specified by the guide\n h = m = s = '-';\n }\n\n // Check if we need to show hours\n h = h > 0 || gh > 0 ? h + ':' : '';\n\n // If hours are showing, we may need to add a leading zero.\n // Always show at least one digit of minutes.\n m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':';\n\n // Check if leading zero is need for seconds\n s = s < 10 ? '0' + s : s;\n return h + m + s;\n };\n\n // Internal pointer to the current implementation.\n let implementation = defaultImplementation;\n\n /**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n * A function which will be used in place of the default formatTime\n * implementation. Will receive the current time in seconds and the\n * guide (in seconds) as arguments.\n */\n function setFormatTime(customImplementation) {\n implementation = customImplementation;\n }\n\n /**\n * Resets formatTime to the default implementation.\n */\n function resetFormatTime() {\n implementation = defaultImplementation;\n }\n\n /**\n * Delegates to either the default time formatting function or a custom\n * function supplied via `setFormatTime`.\n *\n * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a\n * guide (in seconds) will force a number of leading zeros to cover the\n * length of the guide.\n *\n * @example formatTime(125, 600) === \"02:05\"\n * @param {number} seconds\n * Number of seconds to be turned into a string\n *\n * @param {number} guide\n * Number (in seconds) to model the string after\n *\n * @return {string}\n * Time formatted as H:MM:SS or M:SS\n */\n function formatTime(seconds, guide = seconds) {\n return implementation(seconds, guide);\n }\n\n var Time = /*#__PURE__*/Object.freeze({\n __proto__: null,\n createTimeRanges: createTimeRanges$1,\n createTimeRange: createTimeRanges$1,\n setFormatTime: setFormatTime,\n resetFormatTime: resetFormatTime,\n formatTime: formatTime\n });\n\n /**\n * @file buffer.js\n * @module buffer\n */\n\n /**\n * Compute the percentage of the media that has been buffered.\n *\n * @param { import('./time').TimeRange } buffered\n * The current `TimeRanges` object representing buffered time ranges\n *\n * @param {number} duration\n * Total duration of the media\n *\n * @return {number}\n * Percent buffered of the total duration in decimal form.\n */\n function bufferedPercent(buffered, duration) {\n let bufferedDuration = 0;\n let start;\n let end;\n if (!duration) {\n return 0;\n }\n if (!buffered || !buffered.length) {\n buffered = createTimeRanges$1(0, 0);\n }\n for (let i = 0; i < buffered.length; i++) {\n start = buffered.start(i);\n end = buffered.end(i);\n\n // buffered end can be bigger than duration by a very small fraction\n if (end > duration) {\n end = duration;\n }\n bufferedDuration += end - start;\n }\n return bufferedDuration / duration;\n }\n\n /**\n * @file media-error.js\n */\n\n /**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n * This can be of multiple types:\n * - number: should be a standard error code\n * - string: an error message (the code will be 0)\n * - Object: arbitrary properties\n * - `MediaError` (native): used to populate a video.js `MediaError` object\n * - `MediaError` (video.js): will return itself if it's already a\n * video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\n function MediaError(value) {\n // Allow redundant calls to this constructor to avoid having `instanceof`\n // checks peppered around the code.\n if (value instanceof MediaError) {\n return value;\n }\n if (typeof value === 'number') {\n this.code = value;\n } else if (typeof value === 'string') {\n // default code is zero, so this is a custom error\n this.message = value;\n } else if (isObject$1(value)) {\n // We assign the `code` property manually because native `MediaError` objects\n // do not expose it as an own/enumerable property of the object.\n if (typeof value.code === 'number') {\n this.code = value.code;\n }\n Object.assign(this, value);\n }\n if (!this.message) {\n this.message = MediaError.defaultMessages[this.code] || '';\n }\n }\n\n /**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\n MediaError.prototype.code = 0;\n\n /**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\n MediaError.prototype.message = '';\n\n /**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\n MediaError.prototype.status = null;\n\n /**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_ABORTED\n * @property {string} 2 - MEDIA_ERR_NETWORK\n * @property {string} 3 - MEDIA_ERR_DECODE\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\n MediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n\n /**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\n MediaError.defaultMessages = {\n 1: 'You aborted the media playback',\n 2: 'A network error caused the media download to fail part-way.',\n 3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n 4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n 5: 'The media is encrypted and we do not have the keys to decrypt it.'\n };\n\n // Add types as properties on MediaError\n // e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\n for (let errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n MediaError[MediaError.errorTypes[errNum]] = errNum;\n // values should be accessible on both the class and instance\n MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n }\n\n var tuple = SafeParseTuple;\n function SafeParseTuple(obj, reviver) {\n var json;\n var error = null;\n try {\n json = JSON.parse(obj, reviver);\n } catch (err) {\n error = err;\n }\n return [error, json];\n }\n\n /**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param {Object} value\n * An object that may or may not be `Promise`-like.\n *\n * @return {boolean}\n * Whether or not the object is `Promise`-like.\n */\n function isPromise(value) {\n return value !== undefined && value !== null && typeof value.then === 'function';\n }\n\n /**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param {Object} value\n * An object that may or may not be `Promise`-like.\n */\n function silencePromise(value) {\n if (isPromise(value)) {\n value.then(null, e => {});\n }\n }\n\n /**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n /**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n * The text track to query.\n *\n * @return {Object}\n * A serializable javascript representation of the TextTrack.\n * @private\n */\n const trackToJson_ = function (track) {\n const ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce((acc, prop, i) => {\n if (track[prop]) {\n acc[prop] = track[prop];\n }\n return acc;\n }, {\n cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n return {\n startTime: cue.startTime,\n endTime: cue.endTime,\n text: cue.text,\n id: cue.id\n };\n })\n });\n return ret;\n };\n\n /**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param { import('../tech/tech').default } tech\n * The tech object to query\n *\n * @return {Array}\n * A serializable javascript representation of the {@link Tech}s\n * {@link TextTrackList}.\n */\n const textTracksToJson = function (tech) {\n const trackEls = tech.$$('track');\n const trackObjs = Array.prototype.map.call(trackEls, t => t.track);\n const tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n const json = trackToJson_(trackEl.track);\n if (trackEl.src) {\n json.src = trackEl.src;\n }\n return json;\n });\n return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n return trackObjs.indexOf(track) === -1;\n }).map(trackToJson_));\n };\n\n /**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n * An array of `TextTrack` representation objects, like those that would be\n * produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n * The `Tech` to create the `TextTrack`s on.\n */\n const jsonToTextTracks = function (json, tech) {\n json.forEach(function (track) {\n const addedTrack = tech.addRemoteTextTrack(track).track;\n if (!track.src && track.cues) {\n track.cues.forEach(cue => addedTrack.addCue(cue));\n }\n });\n return tech.textTracks();\n };\n var textTrackConverter = {\n textTracksToJson,\n jsonToTextTracks,\n trackToJson_\n };\n\n /**\n * @file modal-dialog.js\n */\n const MODAL_CLASS_NAME = 'vjs-modal-dialog';\n\n /**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n class ModalDialog extends Component$1 {\n /**\n * Create an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param { import('./utils/dom').ContentDescriptor} [options.content=undefined]\n * Provide customized content for this modal.\n *\n * @param {string} [options.description]\n * A text description for the modal, primarily for accessibility.\n *\n * @param {boolean} [options.fillAlways=false]\n * Normally, modals are automatically filled only the first time\n * they open. This tells the modal to refresh its content\n * every time it opens.\n *\n * @param {string} [options.label]\n * A text label for the modal, primarily for accessibility.\n *\n * @param {boolean} [options.pauseOnOpen=true]\n * If `true`, playback will will be paused if playing when\n * the modal opens, and resumed when it closes.\n *\n * @param {boolean} [options.temporary=true]\n * If `true`, the modal can only be opened once; it will be\n * disposed as soon as it's closed.\n *\n * @param {boolean} [options.uncloseable=false]\n * If `true`, the user will not be able to close the modal\n * through the UI in the normal ways. Programmatic closing is\n * still possible.\n */\n constructor(player, options) {\n super(player, options);\n this.handleKeyDown_ = e => this.handleKeyDown(e);\n this.close_ = e => this.close(e);\n this.opened_ = this.hasBeenOpened_ = this.hasBeenFilled_ = false;\n this.closeable(!this.options_.uncloseable);\n this.content(this.options_.content);\n\n // Make sure the contentEl is defined AFTER any children are initialized\n // because we only want the contents of the modal in the contentEl\n // (not the UI elements like the close button).\n this.contentEl_ = createEl('div', {\n className: `${MODAL_CLASS_NAME}-content`\n }, {\n role: 'document'\n });\n this.descEl_ = createEl('p', {\n className: `${MODAL_CLASS_NAME}-description vjs-control-text`,\n id: this.el().getAttribute('aria-describedby')\n });\n textContent(this.descEl_, this.description());\n this.el_.appendChild(this.descEl_);\n this.el_.appendChild(this.contentEl_);\n }\n\n /**\n * Create the `ModalDialog`'s DOM element\n *\n * @return {Element}\n * The DOM element that gets created.\n */\n createEl() {\n return super.createEl('div', {\n className: this.buildCSSClass(),\n tabIndex: -1\n }, {\n 'aria-describedby': `${this.id()}_description`,\n 'aria-hidden': 'true',\n 'aria-label': this.label(),\n 'role': 'dialog'\n });\n }\n dispose() {\n this.contentEl_ = null;\n this.descEl_ = null;\n this.previouslyActiveEl_ = null;\n super.dispose();\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `${MODAL_CLASS_NAME} vjs-hidden ${super.buildCSSClass()}`;\n }\n\n /**\n * Returns the label string for this modal. Primarily used for accessibility.\n *\n * @return {string}\n * the localized or raw label of this modal.\n */\n label() {\n return this.localize(this.options_.label || 'Modal Window');\n }\n\n /**\n * Returns the description string for this modal. Primarily used for\n * accessibility.\n *\n * @return {string}\n * The localized or raw description of this modal.\n */\n description() {\n let desc = this.options_.description || this.localize('This is a modal window.');\n\n // Append a universal closeability message if the modal is closeable.\n if (this.closeable()) {\n desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n }\n return desc;\n }\n\n /**\n * Opens the modal.\n *\n * @fires ModalDialog#beforemodalopen\n * @fires ModalDialog#modalopen\n */\n open() {\n if (!this.opened_) {\n const player = this.player();\n\n /**\n * Fired just before a `ModalDialog` is opened.\n *\n * @event ModalDialog#beforemodalopen\n * @type {Event}\n */\n this.trigger('beforemodalopen');\n this.opened_ = true;\n\n // Fill content if the modal has never opened before and\n // never been filled.\n if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n this.fill();\n }\n\n // If the player was playing, pause it and take note of its previously\n // playing state.\n this.wasPlaying_ = !player.paused();\n if (this.options_.pauseOnOpen && this.wasPlaying_) {\n player.pause();\n }\n this.on('keydown', this.handleKeyDown_);\n\n // Hide controls and note if they were enabled.\n this.hadControls_ = player.controls();\n player.controls(false);\n this.show();\n this.conditionalFocus_();\n this.el().setAttribute('aria-hidden', 'false');\n\n /**\n * Fired just after a `ModalDialog` is opened.\n *\n * @event ModalDialog#modalopen\n * @type {Event}\n */\n this.trigger('modalopen');\n this.hasBeenOpened_ = true;\n }\n }\n\n /**\n * If the `ModalDialog` is currently open or closed.\n *\n * @param {boolean} [value]\n * If given, it will open (`true`) or close (`false`) the modal.\n *\n * @return {boolean}\n * the current open state of the modaldialog\n */\n opened(value) {\n if (typeof value === 'boolean') {\n this[value ? 'open' : 'close']();\n }\n return this.opened_;\n }\n\n /**\n * Closes the modal, does nothing if the `ModalDialog` is\n * not open.\n *\n * @fires ModalDialog#beforemodalclose\n * @fires ModalDialog#modalclose\n */\n close() {\n if (!this.opened_) {\n return;\n }\n const player = this.player();\n\n /**\n * Fired just before a `ModalDialog` is closed.\n *\n * @event ModalDialog#beforemodalclose\n * @type {Event}\n */\n this.trigger('beforemodalclose');\n this.opened_ = false;\n if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n player.play();\n }\n this.off('keydown', this.handleKeyDown_);\n if (this.hadControls_) {\n player.controls(true);\n }\n this.hide();\n this.el().setAttribute('aria-hidden', 'true');\n\n /**\n * Fired just after a `ModalDialog` is closed.\n *\n * @event ModalDialog#modalclose\n * @type {Event}\n */\n this.trigger('modalclose');\n this.conditionalBlur_();\n if (this.options_.temporary) {\n this.dispose();\n }\n }\n\n /**\n * Check to see if the `ModalDialog` is closeable via the UI.\n *\n * @param {boolean} [value]\n * If given as a boolean, it will set the `closeable` option.\n *\n * @return {boolean}\n * Returns the final value of the closable option.\n */\n closeable(value) {\n if (typeof value === 'boolean') {\n const closeable = this.closeable_ = !!value;\n let close = this.getChild('closeButton');\n\n // If this is being made closeable and has no close button, add one.\n if (closeable && !close) {\n // The close button should be a child of the modal - not its\n // content element, so temporarily change the content element.\n const temp = this.contentEl_;\n this.contentEl_ = this.el_;\n close = this.addChild('closeButton', {\n controlText: 'Close Modal Dialog'\n });\n this.contentEl_ = temp;\n this.on(close, 'close', this.close_);\n }\n\n // If this is being made uncloseable and has a close button, remove it.\n if (!closeable && close) {\n this.off(close, 'close', this.close_);\n this.removeChild(close);\n close.dispose();\n }\n }\n return this.closeable_;\n }\n\n /**\n * Fill the modal's content element with the modal's \"content\" option.\n * The content element will be emptied before this change takes place.\n */\n fill() {\n this.fillWith(this.content());\n }\n\n /**\n * Fill the modal's content element with arbitrary content.\n * The content element will be emptied before this change takes place.\n *\n * @fires ModalDialog#beforemodalfill\n * @fires ModalDialog#modalfill\n *\n * @param { import('./utils/dom').ContentDescriptor} [content]\n * The same rules apply to this as apply to the `content` option.\n */\n fillWith(content) {\n const contentEl = this.contentEl();\n const parentEl = contentEl.parentNode;\n const nextSiblingEl = contentEl.nextSibling;\n\n /**\n * Fired just before a `ModalDialog` is filled with content.\n *\n * @event ModalDialog#beforemodalfill\n * @type {Event}\n */\n this.trigger('beforemodalfill');\n this.hasBeenFilled_ = true;\n\n // Detach the content element from the DOM before performing\n // manipulation to avoid modifying the live DOM multiple times.\n parentEl.removeChild(contentEl);\n this.empty();\n insertContent(contentEl, content);\n /**\n * Fired just after a `ModalDialog` is filled with content.\n *\n * @event ModalDialog#modalfill\n * @type {Event}\n */\n this.trigger('modalfill');\n\n // Re-inject the re-filled content element.\n if (nextSiblingEl) {\n parentEl.insertBefore(contentEl, nextSiblingEl);\n } else {\n parentEl.appendChild(contentEl);\n }\n\n // make sure that the close button is last in the dialog DOM\n const closeButton = this.getChild('closeButton');\n if (closeButton) {\n parentEl.appendChild(closeButton.el_);\n }\n }\n\n /**\n * Empties the content element. This happens anytime the modal is filled.\n *\n * @fires ModalDialog#beforemodalempty\n * @fires ModalDialog#modalempty\n */\n empty() {\n /**\n * Fired just before a `ModalDialog` is emptied.\n *\n * @event ModalDialog#beforemodalempty\n * @type {Event}\n */\n this.trigger('beforemodalempty');\n emptyEl(this.contentEl());\n\n /**\n * Fired just after a `ModalDialog` is emptied.\n *\n * @event ModalDialog#modalempty\n * @type {Event}\n */\n this.trigger('modalempty');\n }\n\n /**\n * Gets or sets the modal content, which gets normalized before being\n * rendered into the DOM.\n *\n * This does not update the DOM or fill the modal, but it is called during\n * that process.\n *\n * @param { import('./utils/dom').ContentDescriptor} [value]\n * If defined, sets the internal content value to be used on the\n * next call(s) to `fill`. This value is normalized before being\n * inserted. To \"clear\" the internal content value, pass `null`.\n *\n * @return { import('./utils/dom').ContentDescriptor}\n * The current content of the modal dialog\n */\n content(value) {\n if (typeof value !== 'undefined') {\n this.content_ = value;\n }\n return this.content_;\n }\n\n /**\n * conditionally focus the modal dialog if focus was previously on the player.\n *\n * @private\n */\n conditionalFocus_() {\n const activeEl = document.activeElement;\n const playerEl = this.player_.el_;\n this.previouslyActiveEl_ = null;\n if (playerEl.contains(activeEl) || playerEl === activeEl) {\n this.previouslyActiveEl_ = activeEl;\n this.focus();\n }\n }\n\n /**\n * conditionally blur the element and refocus the last focused element\n *\n * @private\n */\n conditionalBlur_() {\n if (this.previouslyActiveEl_) {\n this.previouslyActiveEl_.focus();\n this.previouslyActiveEl_ = null;\n }\n }\n\n /**\n * Keydown handler. Attached when modal is focused.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Do not allow keydowns to reach out of the modal dialog.\n event.stopPropagation();\n if (keycode.isEventKey(event, 'Escape') && this.closeable()) {\n event.preventDefault();\n this.close();\n return;\n }\n\n // exit early if it isn't a tab key\n if (!keycode.isEventKey(event, 'Tab')) {\n return;\n }\n const focusableEls = this.focusableEls_();\n const activeEl = this.el_.querySelector(':focus');\n let focusIndex;\n for (let i = 0; i < focusableEls.length; i++) {\n if (activeEl === focusableEls[i]) {\n focusIndex = i;\n break;\n }\n }\n if (document.activeElement === this.el_) {\n focusIndex = 0;\n }\n if (event.shiftKey && focusIndex === 0) {\n focusableEls[focusableEls.length - 1].focus();\n event.preventDefault();\n } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n focusableEls[0].focus();\n event.preventDefault();\n }\n }\n\n /**\n * get all focusable elements\n *\n * @private\n */\n focusableEls_() {\n const allChildren = this.el_.querySelectorAll('*');\n return Array.prototype.filter.call(allChildren, child => {\n return (child instanceof window.HTMLAnchorElement || child instanceof window.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window.HTMLInputElement || child instanceof window.HTMLSelectElement || child instanceof window.HTMLTextAreaElement || child instanceof window.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window.HTMLIFrameElement || child instanceof window.HTMLObjectElement || child instanceof window.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n });\n }\n }\n\n /**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n ModalDialog.prototype.options_ = {\n pauseOnOpen: true,\n temporary: true\n };\n Component$1.registerComponent('ModalDialog', ModalDialog);\n\n /**\n * @file track-list.js\n */\n\n /**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n class TrackList extends EventTarget$2 {\n /**\n * Create an instance of this class\n *\n * @param { import('./track').default[] } tracks\n * A list of tracks to initialize the list with.\n *\n * @abstract\n */\n constructor(tracks = []) {\n super();\n this.tracks_ = [];\n\n /**\n * @memberof TrackList\n * @member {number} length\n * The current number of `Track`s in the this Trackist.\n * @instance\n */\n Object.defineProperty(this, 'length', {\n get() {\n return this.tracks_.length;\n }\n });\n for (let i = 0; i < tracks.length; i++) {\n this.addTrack(tracks[i]);\n }\n }\n\n /**\n * Add a {@link Track} to the `TrackList`\n *\n * @param { import('./track').default } track\n * The audio, video, or text track to add to the list.\n *\n * @fires TrackList#addtrack\n */\n addTrack(track) {\n const index = this.tracks_.length;\n if (!('' + index in this)) {\n Object.defineProperty(this, index, {\n get() {\n return this.tracks_[index];\n }\n });\n }\n\n // Do not add duplicate tracks\n if (this.tracks_.indexOf(track) === -1) {\n this.tracks_.push(track);\n /**\n * Triggered when a track is added to a track list.\n *\n * @event TrackList#addtrack\n * @type {Event}\n * @property {Track} track\n * A reference to track that was added.\n */\n this.trigger({\n track,\n type: 'addtrack',\n target: this\n });\n }\n\n /**\n * Triggered when a track label is changed.\n *\n * @event TrackList#addtrack\n * @type {Event}\n * @property {Track} track\n * A reference to track that was added.\n */\n track.labelchange_ = () => {\n this.trigger({\n track,\n type: 'labelchange',\n target: this\n });\n };\n if (isEvented(track)) {\n track.addEventListener('labelchange', track.labelchange_);\n }\n }\n\n /**\n * Remove a {@link Track} from the `TrackList`\n *\n * @param { import('./track').default } rtrack\n * The audio, video, or text track to remove from the list.\n *\n * @fires TrackList#removetrack\n */\n removeTrack(rtrack) {\n let track;\n for (let i = 0, l = this.length; i < l; i++) {\n if (this[i] === rtrack) {\n track = this[i];\n if (track.off) {\n track.off();\n }\n this.tracks_.splice(i, 1);\n break;\n }\n }\n if (!track) {\n return;\n }\n\n /**\n * Triggered when a track is removed from track list.\n *\n * @event TrackList#removetrack\n * @type {Event}\n * @property {Track} track\n * A reference to track that was removed.\n */\n this.trigger({\n track,\n type: 'removetrack',\n target: this\n });\n }\n\n /**\n * Get a Track from the TrackList by a tracks id\n *\n * @param {string} id - the id of the track to get\n * @method getTrackById\n * @return { import('./track').default }\n * @private\n */\n getTrackById(id) {\n let result = null;\n for (let i = 0, l = this.length; i < l; i++) {\n const track = this[i];\n if (track.id === id) {\n result = track;\n break;\n }\n }\n return result;\n }\n }\n\n /**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {Event}\n */\n\n /**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n TrackList.prototype.allowedEvents_ = {\n change: 'change',\n addtrack: 'addtrack',\n removetrack: 'removetrack',\n labelchange: 'labelchange'\n };\n\n // emulate attribute EventHandler support to allow for feature detection\n for (const event in TrackList.prototype.allowedEvents_) {\n TrackList.prototype['on' + event] = null;\n }\n\n /**\n * @file audio-track-list.js\n */\n\n /**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n * list to work on\n *\n * @param { import('./audio-track').default } track\n * The track to skip\n *\n * @private\n */\n const disableOthers$1 = function (list, track) {\n for (let i = 0; i < list.length; i++) {\n if (!Object.keys(list[i]).length || track.id === list[i].id) {\n continue;\n }\n // another audio track is enabled, disable it\n list[i].enabled = false;\n }\n };\n\n /**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n class AudioTrackList extends TrackList {\n /**\n * Create an instance of this class.\n *\n * @param {AudioTrack[]} [tracks=[]]\n * A list of `AudioTrack` to instantiate the list with.\n */\n constructor(tracks = []) {\n // make sure only 1 track is enabled\n // sorted from last index to first index\n for (let i = tracks.length - 1; i >= 0; i--) {\n if (tracks[i].enabled) {\n disableOthers$1(tracks, tracks[i]);\n break;\n }\n }\n super(tracks);\n this.changing_ = false;\n }\n\n /**\n * Add an {@link AudioTrack} to the `AudioTrackList`.\n *\n * @param { import('./audio-track').default } track\n * The AudioTrack to add to the list\n *\n * @fires TrackList#addtrack\n */\n addTrack(track) {\n if (track.enabled) {\n disableOthers$1(this, track);\n }\n super.addTrack(track);\n // native tracks don't have this\n if (!track.addEventListener) {\n return;\n }\n track.enabledChange_ = () => {\n // when we are disabling other tracks (since we don't support\n // more than one track at a time) we will set changing_\n // to true so that we don't trigger additional change events\n if (this.changing_) {\n return;\n }\n this.changing_ = true;\n disableOthers$1(this, track);\n this.changing_ = false;\n this.trigger('change');\n };\n\n /**\n * @listens AudioTrack#enabledchange\n * @fires TrackList#change\n */\n track.addEventListener('enabledchange', track.enabledChange_);\n }\n removeTrack(rtrack) {\n super.removeTrack(rtrack);\n if (rtrack.removeEventListener && rtrack.enabledChange_) {\n rtrack.removeEventListener('enabledchange', rtrack.enabledChange_);\n rtrack.enabledChange_ = null;\n }\n }\n }\n\n /**\n * @file video-track-list.js\n */\n\n /**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n * list to work on\n *\n * @param { import('./video-track').default } track\n * The track to skip\n *\n * @private\n */\n const disableOthers = function (list, track) {\n for (let i = 0; i < list.length; i++) {\n if (!Object.keys(list[i]).length || track.id === list[i].id) {\n continue;\n }\n // another video track is enabled, disable it\n list[i].selected = false;\n }\n };\n\n /**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n class VideoTrackList extends TrackList {\n /**\n * Create an instance of this class.\n *\n * @param {VideoTrack[]} [tracks=[]]\n * A list of `VideoTrack` to instantiate the list with.\n */\n constructor(tracks = []) {\n // make sure only 1 track is enabled\n // sorted from last index to first index\n for (let i = tracks.length - 1; i >= 0; i--) {\n if (tracks[i].selected) {\n disableOthers(tracks, tracks[i]);\n break;\n }\n }\n super(tracks);\n this.changing_ = false;\n\n /**\n * @member {number} VideoTrackList#selectedIndex\n * The current index of the selected {@link VideoTrack`}.\n */\n Object.defineProperty(this, 'selectedIndex', {\n get() {\n for (let i = 0; i < this.length; i++) {\n if (this[i].selected) {\n return i;\n }\n }\n return -1;\n },\n set() {}\n });\n }\n\n /**\n * Add a {@link VideoTrack} to the `VideoTrackList`.\n *\n * @param { import('./video-track').default } track\n * The VideoTrack to add to the list\n *\n * @fires TrackList#addtrack\n */\n addTrack(track) {\n if (track.selected) {\n disableOthers(this, track);\n }\n super.addTrack(track);\n // native tracks don't have this\n if (!track.addEventListener) {\n return;\n }\n track.selectedChange_ = () => {\n if (this.changing_) {\n return;\n }\n this.changing_ = true;\n disableOthers(this, track);\n this.changing_ = false;\n this.trigger('change');\n };\n\n /**\n * @listens VideoTrack#selectedchange\n * @fires TrackList#change\n */\n track.addEventListener('selectedchange', track.selectedChange_);\n }\n removeTrack(rtrack) {\n super.removeTrack(rtrack);\n if (rtrack.removeEventListener && rtrack.selectedChange_) {\n rtrack.removeEventListener('selectedchange', rtrack.selectedChange_);\n rtrack.selectedChange_ = null;\n }\n }\n }\n\n /**\n * @file text-track-list.js\n */\n\n /**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n class TextTrackList extends TrackList {\n /**\n * Add a {@link TextTrack} to the `TextTrackList`\n *\n * @param { import('./text-track').default } track\n * The text track to add to the list.\n *\n * @fires TrackList#addtrack\n */\n addTrack(track) {\n super.addTrack(track);\n if (!this.queueChange_) {\n this.queueChange_ = () => this.queueTrigger('change');\n }\n if (!this.triggerSelectedlanguagechange) {\n this.triggerSelectedlanguagechange_ = () => this.trigger('selectedlanguagechange');\n }\n\n /**\n * @listens TextTrack#modechange\n * @fires TrackList#change\n */\n track.addEventListener('modechange', this.queueChange_);\n const nonLanguageTextTrackKind = ['metadata', 'chapters'];\n if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n track.addEventListener('modechange', this.triggerSelectedlanguagechange_);\n }\n }\n removeTrack(rtrack) {\n super.removeTrack(rtrack);\n\n // manually remove the event handlers we added\n if (rtrack.removeEventListener) {\n if (this.queueChange_) {\n rtrack.removeEventListener('modechange', this.queueChange_);\n }\n if (this.selectedlanguagechange_) {\n rtrack.removeEventListener('modechange', this.triggerSelectedlanguagechange_);\n }\n }\n }\n }\n\n /**\n * @file html-track-element-list.js\n */\n\n /**\n * The current list of {@link HtmlTrackElement}s.\n */\n class HtmlTrackElementList {\n /**\n * Create an instance of this class.\n *\n * @param {HtmlTrackElement[]} [tracks=[]]\n * A list of `HtmlTrackElement` to instantiate the list with.\n */\n constructor(trackElements = []) {\n this.trackElements_ = [];\n\n /**\n * @memberof HtmlTrackElementList\n * @member {number} length\n * The current number of `Track`s in the this Trackist.\n * @instance\n */\n Object.defineProperty(this, 'length', {\n get() {\n return this.trackElements_.length;\n }\n });\n for (let i = 0, length = trackElements.length; i < length; i++) {\n this.addTrackElement_(trackElements[i]);\n }\n }\n\n /**\n * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n *\n * @param {HtmlTrackElement} trackElement\n * The track element to add to the list.\n *\n * @private\n */\n addTrackElement_(trackElement) {\n const index = this.trackElements_.length;\n if (!('' + index in this)) {\n Object.defineProperty(this, index, {\n get() {\n return this.trackElements_[index];\n }\n });\n }\n\n // Do not add duplicate elements\n if (this.trackElements_.indexOf(trackElement) === -1) {\n this.trackElements_.push(trackElement);\n }\n }\n\n /**\n * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n * {@link TextTrack}.\n *\n * @param {TextTrack} track\n * The track associated with a track element.\n *\n * @return {HtmlTrackElement|undefined}\n * The track element that was found or undefined.\n *\n * @private\n */\n getTrackElementByTrack_(track) {\n let trackElement_;\n for (let i = 0, length = this.trackElements_.length; i < length; i++) {\n if (track === this.trackElements_[i].track) {\n trackElement_ = this.trackElements_[i];\n break;\n }\n }\n return trackElement_;\n }\n\n /**\n * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n *\n * @param {HtmlTrackElement} trackElement\n * The track element to remove from the list.\n *\n * @private\n */\n removeTrackElement_(trackElement) {\n for (let i = 0, length = this.trackElements_.length; i < length; i++) {\n if (trackElement === this.trackElements_[i]) {\n if (this.trackElements_[i].track && typeof this.trackElements_[i].track.off === 'function') {\n this.trackElements_[i].track.off();\n }\n if (typeof this.trackElements_[i].off === 'function') {\n this.trackElements_[i].off();\n }\n this.trackElements_.splice(i, 1);\n break;\n }\n }\n }\n }\n\n /**\n * @file text-track-cue-list.js\n */\n\n /**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n * The unique id for this text track cue\n *\n * @property {number} startTime\n * The start time for this text track cue\n *\n * @property {number} endTime\n * The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n * Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n /**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\n class TextTrackCueList {\n /**\n * Create an instance of this class..\n *\n * @param {Array} cues\n * A list of cues to be initialized with\n */\n constructor(cues) {\n TextTrackCueList.prototype.setCues_.call(this, cues);\n\n /**\n * @memberof TextTrackCueList\n * @member {number} length\n * The current number of `TextTrackCue`s in the TextTrackCueList.\n * @instance\n */\n Object.defineProperty(this, 'length', {\n get() {\n return this.length_;\n }\n });\n }\n\n /**\n * A setter for cues in this list. Creates getters\n * an an index for the cues.\n *\n * @param {Array} cues\n * An array of cues to set\n *\n * @private\n */\n setCues_(cues) {\n const oldLength = this.length || 0;\n let i = 0;\n const l = cues.length;\n this.cues_ = cues;\n this.length_ = cues.length;\n const defineProp = function (index) {\n if (!('' + index in this)) {\n Object.defineProperty(this, '' + index, {\n get() {\n return this.cues_[index];\n }\n });\n }\n };\n if (oldLength < l) {\n i = oldLength;\n for (; i < l; i++) {\n defineProp.call(this, i);\n }\n }\n }\n\n /**\n * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n *\n * @param {string} id\n * The id of the cue that should be searched for.\n *\n * @return {TextTrackCueList~TextTrackCue|null}\n * A single cue or null if none was found.\n */\n getCueById(id) {\n let result = null;\n for (let i = 0, l = this.length; i < l; i++) {\n const cue = this[i];\n if (cue.id === id) {\n result = cue;\n break;\n }\n }\n return result;\n }\n }\n\n /**\n * @file track-kinds.js\n */\n\n /**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\n const VideoTrackKind = {\n alternative: 'alternative',\n captions: 'captions',\n main: 'main',\n sign: 'sign',\n subtitles: 'subtitles',\n commentary: 'commentary'\n };\n\n /**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\n const AudioTrackKind = {\n 'alternative': 'alternative',\n 'descriptions': 'descriptions',\n 'main': 'main',\n 'main-desc': 'main-desc',\n 'translation': 'translation',\n 'commentary': 'commentary'\n };\n\n /**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\n const TextTrackKind = {\n subtitles: 'subtitles',\n captions: 'captions',\n descriptions: 'descriptions',\n chapters: 'chapters',\n metadata: 'metadata'\n };\n\n /**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\n const TextTrackMode = {\n disabled: 'disabled',\n hidden: 'hidden',\n showing: 'showing'\n };\n\n /**\n * @file track.js\n */\n\n /**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n class Track extends EventTarget$2 {\n /**\n * Create an instance of this class.\n *\n * @param {Object} [options={}]\n * Object of option names and values\n *\n * @param {string} [options.kind='']\n * A valid kind for the track type you are creating.\n *\n * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n * A unique id for this AudioTrack.\n *\n * @param {string} [options.label='']\n * The menu label for this track.\n *\n * @param {string} [options.language='']\n * A valid two character language code.\n *\n * @abstract\n */\n constructor(options = {}) {\n super();\n const trackProps = {\n id: options.id || 'vjs_track_' + newGUID(),\n kind: options.kind || '',\n language: options.language || ''\n };\n let label = options.label || '';\n\n /**\n * @memberof Track\n * @member {string} id\n * The id of this track. Cannot be changed after creation.\n * @instance\n *\n * @readonly\n */\n\n /**\n * @memberof Track\n * @member {string} kind\n * The kind of track that this is. Cannot be changed after creation.\n * @instance\n *\n * @readonly\n */\n\n /**\n * @memberof Track\n * @member {string} language\n * The two letter language code for this track. Cannot be changed after\n * creation.\n * @instance\n *\n * @readonly\n */\n\n for (const key in trackProps) {\n Object.defineProperty(this, key, {\n get() {\n return trackProps[key];\n },\n set() {}\n });\n }\n\n /**\n * @memberof Track\n * @member {string} label\n * The label of this track. Cannot be changed after creation.\n * @instance\n *\n * @fires Track#labelchange\n */\n Object.defineProperty(this, 'label', {\n get() {\n return label;\n },\n set(newLabel) {\n if (newLabel !== label) {\n label = newLabel;\n\n /**\n * An event that fires when label changes on this track.\n *\n * > Note: This is not part of the spec!\n *\n * @event Track#labelchange\n * @type {Event}\n */\n this.trigger('labelchange');\n }\n }\n });\n }\n }\n\n /**\n * @file url.js\n * @module url\n */\n\n /**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n * The protocol of the url that was parsed.\n *\n * @property {string} hostname\n * The hostname of the url that was parsed.\n *\n * @property {string} port\n * The port of the url that was parsed.\n *\n * @property {string} pathname\n * The pathname of the url that was parsed.\n *\n * @property {string} search\n * The search query of the url that was parsed.\n *\n * @property {string} hash\n * The hash of the url that was parsed.\n *\n * @property {string} host\n * The host of the url that was parsed.\n */\n\n /**\n * Resolve and parse the elements of a URL.\n *\n * @function\n * @param {String} url\n * The url to parse\n *\n * @return {url:URLObject}\n * An object of url details\n */\n const parseUrl = function (url) {\n // This entire method can be replace with URL once we are able to drop IE11\n\n const props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host'];\n\n // add the url to an anchor and let the browser parse the URL\n const a = document.createElement('a');\n a.href = url;\n\n // Copy the specific URL properties to a new object\n // This is also needed for IE because the anchor loses its\n // properties when it's removed from the dom\n const details = {};\n for (let i = 0; i < props.length; i++) {\n details[props[i]] = a[props[i]];\n }\n\n // IE adds the port to the host property unlike everyone else. If\n // a port identifier is added for standard ports, strip it.\n if (details.protocol === 'http:') {\n details.host = details.host.replace(/:80$/, '');\n }\n if (details.protocol === 'https:') {\n details.host = details.host.replace(/:443$/, '');\n }\n if (!details.protocol) {\n details.protocol = window.location.protocol;\n }\n\n /* istanbul ignore if */\n if (!details.host) {\n details.host = window.location.host;\n }\n return details;\n };\n\n /**\n * Get absolute version of relative URL.\n *\n * @function\n * @param {string} url\n * URL to make absolute\n *\n * @return {string}\n * Absolute URL\n *\n * @see http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\n const getAbsoluteURL = function (url) {\n // Check if absolute URL\n if (!url.match(/^https?:\\/\\//)) {\n // Add the url to an anchor and let the browser parse it to convert to an absolute url\n const a = document.createElement('a');\n a.href = url;\n url = a.href;\n }\n return url;\n };\n\n /**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @function\n * @param {string} path\n * The fileName path like '/path/to/file.mp4'\n *\n * @return {string}\n * The extension in lower case or an empty string if no\n * extension could be found.\n */\n const getFileExtension = function (path) {\n if (typeof path === 'string') {\n const splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/;\n const pathParts = splitPathRe.exec(path);\n if (pathParts) {\n return pathParts.pop().toLowerCase();\n }\n }\n return '';\n };\n\n /**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @function\n * @param {string} url\n * The url to check.\n *\n * @param {Object} [winLoc]\n * the domain to check the url against, defaults to window.location\n *\n * @param {string} [winLoc.protocol]\n * The window location protocol defaults to window.location.protocol\n *\n * @param {string} [winLoc.host]\n * The window location host defaults to window.location.host\n *\n * @return {boolean}\n * Whether it is a cross domain request or not.\n */\n const isCrossOrigin = function (url, winLoc = window.location) {\n const urlInfo = parseUrl(url);\n\n // IE8 protocol relative urls will return ':' for protocol\n const srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol;\n\n // Check if url is for another domain/origin\n // IE8 doesn't know location.origin, so we won't rely on it here\n const crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n return crossOrigin;\n };\n\n var Url = /*#__PURE__*/Object.freeze({\n __proto__: null,\n parseUrl: parseUrl,\n getAbsoluteURL: getAbsoluteURL,\n getFileExtension: getFileExtension,\n isCrossOrigin: isCrossOrigin\n });\n\n var win;\n if (typeof window !== \"undefined\") {\n win = window;\n } else if (typeof commonjsGlobal !== \"undefined\") {\n win = commonjsGlobal;\n } else if (typeof self !== \"undefined\") {\n win = self;\n } else {\n win = {};\n }\n var window_1 = win;\n\n var _extends_1 = createCommonjsModule(function (module) {\n function _extends() {\n module.exports = _extends = Object.assign ? Object.assign.bind() : function (target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i];\n for (var key in source) {\n if (Object.prototype.hasOwnProperty.call(source, key)) {\n target[key] = source[key];\n }\n }\n }\n return target;\n }, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n return _extends.apply(this, arguments);\n }\n module.exports = _extends, module.exports.__esModule = true, module.exports[\"default\"] = module.exports;\n });\n var _extends$1 = unwrapExports(_extends_1);\n\n var isFunction_1 = isFunction;\n var toString = Object.prototype.toString;\n function isFunction(fn) {\n if (!fn) {\n return false;\n }\n var string = toString.call(fn);\n return string === '[object Function]' || typeof fn === 'function' && string !== '[object RegExp]' || typeof window !== 'undefined' && (\n // IE8 and below\n fn === window.setTimeout || fn === window.alert || fn === window.confirm || fn === window.prompt);\n }\n\n var httpResponseHandler = function httpResponseHandler(callback, decodeResponseBody) {\n if (decodeResponseBody === void 0) {\n decodeResponseBody = false;\n }\n return function (err, response, responseBody) {\n // if the XHR failed, return that error\n if (err) {\n callback(err);\n return;\n } // if the HTTP status code is 4xx or 5xx, the request also failed\n\n if (response.statusCode >= 400 && response.statusCode <= 599) {\n var cause = responseBody;\n if (decodeResponseBody) {\n if (window_1.TextDecoder) {\n var charset = getCharset(response.headers && response.headers['content-type']);\n try {\n cause = new TextDecoder(charset).decode(responseBody);\n } catch (e) {}\n } else {\n cause = String.fromCharCode.apply(null, new Uint8Array(responseBody));\n }\n }\n callback({\n cause: cause\n });\n return;\n } // otherwise, request succeeded\n\n callback(null, responseBody);\n };\n };\n function getCharset(contentTypeHeader) {\n if (contentTypeHeader === void 0) {\n contentTypeHeader = '';\n }\n return contentTypeHeader.toLowerCase().split(';').reduce(function (charset, contentType) {\n var _contentType$split = contentType.split('='),\n type = _contentType$split[0],\n value = _contentType$split[1];\n if (type.trim() === 'charset') {\n return value.trim();\n }\n return charset;\n }, 'utf-8');\n }\n var httpHandler = httpResponseHandler;\n\n createXHR.httpHandler = httpHandler;\n /**\n * @license\n * slighly modified parse-headers 2.0.2 <https://github.com/kesla/parse-headers/>\n * Copyright (c) 2014 David Björklund\n * Available under the MIT license\n * <https://github.com/kesla/parse-headers/blob/master/LICENCE>\n */\n\n var parseHeaders = function parseHeaders(headers) {\n var result = {};\n if (!headers) {\n return result;\n }\n headers.trim().split('\\n').forEach(function (row) {\n var index = row.indexOf(':');\n var key = row.slice(0, index).trim().toLowerCase();\n var value = row.slice(index + 1).trim();\n if (typeof result[key] === 'undefined') {\n result[key] = value;\n } else if (Array.isArray(result[key])) {\n result[key].push(value);\n } else {\n result[key] = [result[key], value];\n }\n });\n return result;\n };\n var lib = createXHR; // Allow use of default import syntax in TypeScript\n\n var default_1 = createXHR;\n createXHR.XMLHttpRequest = window_1.XMLHttpRequest || noop$1;\n createXHR.XDomainRequest = \"withCredentials\" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window_1.XDomainRequest;\n forEachArray([\"get\", \"put\", \"post\", \"patch\", \"head\", \"delete\"], function (method) {\n createXHR[method === \"delete\" ? \"del\" : method] = function (uri, options, callback) {\n options = initParams(uri, options, callback);\n options.method = method.toUpperCase();\n return _createXHR(options);\n };\n });\n function forEachArray(array, iterator) {\n for (var i = 0; i < array.length; i++) {\n iterator(array[i]);\n }\n }\n function isEmpty(obj) {\n for (var i in obj) {\n if (obj.hasOwnProperty(i)) return false;\n }\n return true;\n }\n function initParams(uri, options, callback) {\n var params = uri;\n if (isFunction_1(options)) {\n callback = options;\n if (typeof uri === \"string\") {\n params = {\n uri: uri\n };\n }\n } else {\n params = _extends_1({}, options, {\n uri: uri\n });\n }\n params.callback = callback;\n return params;\n }\n function createXHR(uri, options, callback) {\n options = initParams(uri, options, callback);\n return _createXHR(options);\n }\n function _createXHR(options) {\n if (typeof options.callback === \"undefined\") {\n throw new Error(\"callback argument missing\");\n }\n var called = false;\n var callback = function cbOnce(err, response, body) {\n if (!called) {\n called = true;\n options.callback(err, response, body);\n }\n };\n function readystatechange() {\n if (xhr.readyState === 4) {\n setTimeout(loadFunc, 0);\n }\n }\n function getBody() {\n // Chrome with requestType=blob throws errors arround when even testing access to responseText\n var body = undefined;\n if (xhr.response) {\n body = xhr.response;\n } else {\n body = xhr.responseText || getXml(xhr);\n }\n if (isJson) {\n try {\n body = JSON.parse(body);\n } catch (e) {}\n }\n return body;\n }\n function errorFunc(evt) {\n clearTimeout(timeoutTimer);\n if (!(evt instanceof Error)) {\n evt = new Error(\"\" + (evt || \"Unknown XMLHttpRequest Error\"));\n }\n evt.statusCode = 0;\n return callback(evt, failureResponse);\n } // will load the data & process the response in a special response object\n\n function loadFunc() {\n if (aborted) return;\n var status;\n clearTimeout(timeoutTimer);\n if (options.useXDR && xhr.status === undefined) {\n //IE8 CORS GET successful response doesn't have a status field, but body is fine\n status = 200;\n } else {\n status = xhr.status === 1223 ? 204 : xhr.status;\n }\n var response = failureResponse;\n var err = null;\n if (status !== 0) {\n response = {\n body: getBody(),\n statusCode: status,\n method: method,\n headers: {},\n url: uri,\n rawRequest: xhr\n };\n if (xhr.getAllResponseHeaders) {\n //remember xhr can in fact be XDR for CORS in IE\n response.headers = parseHeaders(xhr.getAllResponseHeaders());\n }\n } else {\n err = new Error(\"Internal XMLHttpRequest Error\");\n }\n return callback(err, response, response.body);\n }\n var xhr = options.xhr || null;\n if (!xhr) {\n if (options.cors || options.useXDR) {\n xhr = new createXHR.XDomainRequest();\n } else {\n xhr = new createXHR.XMLHttpRequest();\n }\n }\n var key;\n var aborted;\n var uri = xhr.url = options.uri || options.url;\n var method = xhr.method = options.method || \"GET\";\n var body = options.body || options.data;\n var headers = xhr.headers = options.headers || {};\n var sync = !!options.sync;\n var isJson = false;\n var timeoutTimer;\n var failureResponse = {\n body: undefined,\n headers: {},\n statusCode: 0,\n method: method,\n url: uri,\n rawRequest: xhr\n };\n if (\"json\" in options && options.json !== false) {\n isJson = true;\n headers[\"accept\"] || headers[\"Accept\"] || (headers[\"Accept\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n if (method !== \"GET\" && method !== \"HEAD\") {\n headers[\"content-type\"] || headers[\"Content-Type\"] || (headers[\"Content-Type\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n body = JSON.stringify(options.json === true ? body : options.json);\n }\n }\n xhr.onreadystatechange = readystatechange;\n xhr.onload = loadFunc;\n xhr.onerror = errorFunc; // IE9 must have onprogress be set to a unique function.\n\n xhr.onprogress = function () {// IE must die\n };\n xhr.onabort = function () {\n aborted = true;\n };\n xhr.ontimeout = errorFunc;\n xhr.open(method, uri, !sync, options.username, options.password); //has to be after open\n\n if (!sync) {\n xhr.withCredentials = !!options.withCredentials;\n } // Cannot set timeout with sync request\n // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly\n // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent\n\n if (!sync && options.timeout > 0) {\n timeoutTimer = setTimeout(function () {\n if (aborted) return;\n aborted = true; //IE9 may still call readystatechange\n\n xhr.abort(\"timeout\");\n var e = new Error(\"XMLHttpRequest timeout\");\n e.code = \"ETIMEDOUT\";\n errorFunc(e);\n }, options.timeout);\n }\n if (xhr.setRequestHeader) {\n for (key in headers) {\n if (headers.hasOwnProperty(key)) {\n xhr.setRequestHeader(key, headers[key]);\n }\n }\n } else if (options.headers && !isEmpty(options.headers)) {\n throw new Error(\"Headers cannot be set on an XDomainRequest object\");\n }\n if (\"responseType\" in options) {\n xhr.responseType = options.responseType;\n }\n if (\"beforeSend\" in options && typeof options.beforeSend === \"function\") {\n options.beforeSend(xhr);\n } // Microsoft Edge browser sends \"undefined\" when send is called with undefined value.\n // XMLHttpRequest spec says to pass null as body to indicate no body\n // See https://github.com/naugtur/xhr/issues/100.\n\n xhr.send(body || null);\n return xhr;\n }\n function getXml(xhr) {\n // xhr.responseXML will throw Exception \"InvalidStateError\" or \"DOMException\"\n // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.\n try {\n if (xhr.responseType === \"document\") {\n return xhr.responseXML;\n }\n var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === \"parsererror\";\n if (xhr.responseType === \"\" && !firefoxBugTakenEffect) {\n return xhr.responseXML;\n }\n } catch (e) {}\n return null;\n }\n function noop$1() {}\n lib.default = default_1;\n\n /**\n * @file text-track.js\n */\n\n /**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n * webVTT file contents\n *\n * @param {TextTrack} track\n * TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\n const parseCues = function (srcContent, track) {\n const parser = new window.WebVTT.Parser(window, window.vttjs, window.WebVTT.StringDecoder());\n const errors = [];\n parser.oncue = function (cue) {\n track.addCue(cue);\n };\n parser.onparsingerror = function (error) {\n errors.push(error);\n };\n parser.onflush = function () {\n track.trigger({\n type: 'loadeddata',\n target: track\n });\n };\n parser.parse(srcContent);\n if (errors.length > 0) {\n if (window.console && window.console.groupCollapsed) {\n window.console.groupCollapsed(`Text Track parsing errors for ${track.src}`);\n }\n errors.forEach(error => log$1.error(error));\n if (window.console && window.console.groupEnd) {\n window.console.groupEnd();\n }\n }\n parser.flush();\n };\n\n /**\n * Load a `TextTrack` from a specified url.\n *\n * @param {string} src\n * Url to load track from.\n *\n * @param {TextTrack} track\n * Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\n const loadTrack = function (src, track) {\n const opts = {\n uri: src\n };\n const crossOrigin = isCrossOrigin(src);\n if (crossOrigin) {\n opts.cors = crossOrigin;\n }\n const withCredentials = track.tech_.crossOrigin() === 'use-credentials';\n if (withCredentials) {\n opts.withCredentials = withCredentials;\n }\n lib(opts, bind_(this, function (err, response, responseBody) {\n if (err) {\n return log$1.error(err, response);\n }\n track.loaded_ = true;\n\n // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n // NOTE: this is only used for the alt/video.novtt.js build\n if (typeof window.WebVTT !== 'function') {\n if (track.tech_) {\n // to prevent use before define eslint error, we define loadHandler\n // as a let here\n track.tech_.any(['vttjsloaded', 'vttjserror'], event => {\n if (event.type === 'vttjserror') {\n log$1.error(`vttjs failed to load, stopping trying to process ${track.src}`);\n return;\n }\n return parseCues(responseBody, track);\n });\n }\n } else {\n parseCues(responseBody, track);\n }\n }));\n };\n\n /**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n class TextTrack extends Track {\n /**\n * Create an instance of this class.\n *\n * @param {Object} options={}\n * Object of option names and values\n *\n * @param { import('../tech/tech').default } options.tech\n * A reference to the tech that owns this TextTrack.\n *\n * @param {TextTrack~Kind} [options.kind='subtitles']\n * A valid text track kind.\n *\n * @param {TextTrack~Mode} [options.mode='disabled']\n * A valid text track mode.\n *\n * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n * A unique id for this TextTrack.\n *\n * @param {string} [options.label='']\n * The menu label for this track.\n *\n * @param {string} [options.language='']\n * A valid two character language code.\n *\n * @param {string} [options.srclang='']\n * A valid two character language code. An alternative, but deprioritized\n * version of `options.language`\n *\n * @param {string} [options.src]\n * A url to TextTrack cues.\n *\n * @param {boolean} [options.default]\n * If this track should default to on or off.\n */\n constructor(options = {}) {\n if (!options.tech) {\n throw new Error('A tech was not provided.');\n }\n const settings = merge$2(options, {\n kind: TextTrackKind[options.kind] || 'subtitles',\n language: options.language || options.srclang || ''\n });\n let mode = TextTrackMode[settings.mode] || 'disabled';\n const default_ = settings.default;\n if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n mode = 'hidden';\n }\n super(settings);\n this.tech_ = settings.tech;\n this.cues_ = [];\n this.activeCues_ = [];\n this.preload_ = this.tech_.preloadTextTracks !== false;\n const cues = new TextTrackCueList(this.cues_);\n const activeCues = new TextTrackCueList(this.activeCues_);\n let changed = false;\n this.timeupdateHandler = bind_(this, function (event = {}) {\n if (this.tech_.isDisposed()) {\n return;\n }\n if (!this.tech_.isReady_) {\n if (event.type !== 'timeupdate') {\n this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n }\n return;\n }\n\n // Accessing this.activeCues for the side-effects of updating itself\n // due to its nature as a getter function. Do not remove or cues will\n // stop updating!\n // Use the setter to prevent deletion from uglify (pure_getters rule)\n this.activeCues = this.activeCues;\n if (changed) {\n this.trigger('cuechange');\n changed = false;\n }\n if (event.type !== 'timeupdate') {\n this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n }\n });\n const disposeHandler = () => {\n this.stopTracking();\n };\n this.tech_.one('dispose', disposeHandler);\n if (mode !== 'disabled') {\n this.startTracking();\n }\n Object.defineProperties(this, {\n /**\n * @memberof TextTrack\n * @member {boolean} default\n * If this track was set to be on or off by default. Cannot be changed after\n * creation.\n * @instance\n *\n * @readonly\n */\n default: {\n get() {\n return default_;\n },\n set() {}\n },\n /**\n * @memberof TextTrack\n * @member {string} mode\n * Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n * not be set if setting to an invalid mode.\n * @instance\n *\n * @fires TextTrack#modechange\n */\n mode: {\n get() {\n return mode;\n },\n set(newMode) {\n if (!TextTrackMode[newMode]) {\n return;\n }\n if (mode === newMode) {\n return;\n }\n mode = newMode;\n if (!this.preload_ && mode !== 'disabled' && this.cues.length === 0) {\n // On-demand load.\n loadTrack(this.src, this);\n }\n this.stopTracking();\n if (mode !== 'disabled') {\n this.startTracking();\n }\n /**\n * An event that fires when mode changes on this track. This allows\n * the TextTrackList that holds this track to act accordingly.\n *\n * > Note: This is not part of the spec!\n *\n * @event TextTrack#modechange\n * @type {Event}\n */\n this.trigger('modechange');\n }\n },\n /**\n * @memberof TextTrack\n * @member {TextTrackCueList} cues\n * The text track cue list for this TextTrack.\n * @instance\n */\n cues: {\n get() {\n if (!this.loaded_) {\n return null;\n }\n return cues;\n },\n set() {}\n },\n /**\n * @memberof TextTrack\n * @member {TextTrackCueList} activeCues\n * The list text track cues that are currently active for this TextTrack.\n * @instance\n */\n activeCues: {\n get() {\n if (!this.loaded_) {\n return null;\n }\n\n // nothing to do\n if (this.cues.length === 0) {\n return activeCues;\n }\n const ct = this.tech_.currentTime();\n const active = [];\n for (let i = 0, l = this.cues.length; i < l; i++) {\n const cue = this.cues[i];\n if (cue.startTime <= ct && cue.endTime >= ct) {\n active.push(cue);\n }\n }\n changed = false;\n if (active.length !== this.activeCues_.length) {\n changed = true;\n } else {\n for (let i = 0; i < active.length; i++) {\n if (this.activeCues_.indexOf(active[i]) === -1) {\n changed = true;\n }\n }\n }\n this.activeCues_ = active;\n activeCues.setCues_(this.activeCues_);\n return activeCues;\n },\n // /!\\ Keep this setter empty (see the timeupdate handler above)\n set() {}\n }\n });\n if (settings.src) {\n this.src = settings.src;\n if (!this.preload_) {\n // Tracks will load on-demand.\n // Act like we're loaded for other purposes.\n this.loaded_ = true;\n }\n if (this.preload_ || settings.kind !== 'subtitles' && settings.kind !== 'captions') {\n loadTrack(this.src, this);\n }\n } else {\n this.loaded_ = true;\n }\n }\n startTracking() {\n // More precise cues based on requestVideoFrameCallback with a requestAnimationFram fallback\n this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n // Also listen to timeupdate in case rVFC/rAF stops (window in background, audio in video el)\n this.tech_.on('timeupdate', this.timeupdateHandler);\n }\n stopTracking() {\n if (this.rvf_) {\n this.tech_.cancelVideoFrameCallback(this.rvf_);\n this.rvf_ = undefined;\n }\n this.tech_.off('timeupdate', this.timeupdateHandler);\n }\n\n /**\n * Add a cue to the internal list of cues.\n *\n * @param {TextTrack~Cue} cue\n * The cue to add to our internal list\n */\n addCue(originalCue) {\n let cue = originalCue;\n if (window.vttjs && !(originalCue instanceof window.vttjs.VTTCue)) {\n cue = new window.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n for (const prop in originalCue) {\n if (!(prop in cue)) {\n cue[prop] = originalCue[prop];\n }\n }\n\n // make sure that `id` is copied over\n cue.id = originalCue.id;\n cue.originalCue_ = originalCue;\n }\n const tracks = this.tech_.textTracks();\n for (let i = 0; i < tracks.length; i++) {\n if (tracks[i] !== this) {\n tracks[i].removeCue(cue);\n }\n }\n this.cues_.push(cue);\n this.cues.setCues_(this.cues_);\n }\n\n /**\n * Remove a cue from our internal list\n *\n * @param {TextTrack~Cue} removeCue\n * The cue to remove from our internal list\n */\n removeCue(removeCue) {\n let i = this.cues_.length;\n while (i--) {\n const cue = this.cues_[i];\n if (cue === removeCue || cue.originalCue_ && cue.originalCue_ === removeCue) {\n this.cues_.splice(i, 1);\n this.cues.setCues_(this.cues_);\n break;\n }\n }\n }\n }\n\n /**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n TextTrack.prototype.allowedEvents_ = {\n cuechange: 'cuechange'\n };\n\n /**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n class AudioTrack extends Track {\n /**\n * Create an instance of this class.\n *\n * @param {Object} [options={}]\n * Object of option names and values\n *\n * @param {AudioTrack~Kind} [options.kind='']\n * A valid audio track kind\n *\n * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n * A unique id for this AudioTrack.\n *\n * @param {string} [options.label='']\n * The menu label for this track.\n *\n * @param {string} [options.language='']\n * A valid two character language code.\n *\n * @param {boolean} [options.enabled]\n * If this track is the one that is currently playing. If this track is part of\n * an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n */\n constructor(options = {}) {\n const settings = merge$2(options, {\n kind: AudioTrackKind[options.kind] || ''\n });\n super(settings);\n let enabled = false;\n\n /**\n * @memberof AudioTrack\n * @member {boolean} enabled\n * If this `AudioTrack` is enabled or not. When setting this will\n * fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n * @instance\n *\n * @fires VideoTrack#selectedchange\n */\n Object.defineProperty(this, 'enabled', {\n get() {\n return enabled;\n },\n set(newEnabled) {\n // an invalid or unchanged value\n if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n return;\n }\n enabled = newEnabled;\n\n /**\n * An event that fires when enabled changes on this track. This allows\n * the AudioTrackList that holds this track to act accordingly.\n *\n * > Note: This is not part of the spec! Native tracks will do\n * this internally without an event.\n *\n * @event AudioTrack#enabledchange\n * @type {Event}\n */\n this.trigger('enabledchange');\n }\n });\n\n // if the user sets this track to selected then\n // set selected to that true value otherwise\n // we keep it false\n if (settings.enabled) {\n this.enabled = settings.enabled;\n }\n this.loaded_ = true;\n }\n }\n\n /**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n class VideoTrack extends Track {\n /**\n * Create an instance of this class.\n *\n * @param {Object} [options={}]\n * Object of option names and values\n *\n * @param {string} [options.kind='']\n * A valid {@link VideoTrack~Kind}\n *\n * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n * A unique id for this AudioTrack.\n *\n * @param {string} [options.label='']\n * The menu label for this track.\n *\n * @param {string} [options.language='']\n * A valid two character language code.\n *\n * @param {boolean} [options.selected]\n * If this track is the one that is currently playing.\n */\n constructor(options = {}) {\n const settings = merge$2(options, {\n kind: VideoTrackKind[options.kind] || ''\n });\n super(settings);\n let selected = false;\n\n /**\n * @memberof VideoTrack\n * @member {boolean} selected\n * If this `VideoTrack` is selected or not. When setting this will\n * fire {@link VideoTrack#selectedchange} if the state of selected changed.\n * @instance\n *\n * @fires VideoTrack#selectedchange\n */\n Object.defineProperty(this, 'selected', {\n get() {\n return selected;\n },\n set(newSelected) {\n // an invalid or unchanged value\n if (typeof newSelected !== 'boolean' || newSelected === selected) {\n return;\n }\n selected = newSelected;\n\n /**\n * An event that fires when selected changes on this track. This allows\n * the VideoTrackList that holds this track to act accordingly.\n *\n * > Note: This is not part of the spec! Native tracks will do\n * this internally without an event.\n *\n * @event VideoTrack#selectedchange\n * @type {Event}\n */\n this.trigger('selectedchange');\n }\n });\n\n // if the user sets this track to selected then\n // set selected to that true value otherwise\n // we keep it false\n if (settings.selected) {\n this.selected = settings.selected;\n }\n }\n }\n\n /**\n * @file html-track-element.js\n */\n\n /**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n class HTMLTrackElement extends EventTarget$2 {\n /**\n * Create an instance of this class.\n *\n * @param {Object} options={}\n * Object of option names and values\n *\n * @param { import('../tech/tech').default } options.tech\n * A reference to the tech that owns this HTMLTrackElement.\n *\n * @param {TextTrack~Kind} [options.kind='subtitles']\n * A valid text track kind.\n *\n * @param {TextTrack~Mode} [options.mode='disabled']\n * A valid text track mode.\n *\n * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n * A unique id for this TextTrack.\n *\n * @param {string} [options.label='']\n * The menu label for this track.\n *\n * @param {string} [options.language='']\n * A valid two character language code.\n *\n * @param {string} [options.srclang='']\n * A valid two character language code. An alternative, but deprioritized\n * version of `options.language`\n *\n * @param {string} [options.src]\n * A url to TextTrack cues.\n *\n * @param {boolean} [options.default]\n * If this track should default to on or off.\n */\n constructor(options = {}) {\n super();\n let readyState;\n const track = new TextTrack(options);\n this.kind = track.kind;\n this.src = track.src;\n this.srclang = track.language;\n this.label = track.label;\n this.default = track.default;\n Object.defineProperties(this, {\n /**\n * @memberof HTMLTrackElement\n * @member {HTMLTrackElement~ReadyState} readyState\n * The current ready state of the track element.\n * @instance\n */\n readyState: {\n get() {\n return readyState;\n }\n },\n /**\n * @memberof HTMLTrackElement\n * @member {TextTrack} track\n * The underlying TextTrack object.\n * @instance\n *\n */\n track: {\n get() {\n return track;\n }\n }\n });\n readyState = HTMLTrackElement.NONE;\n\n /**\n * @listens TextTrack#loadeddata\n * @fires HTMLTrackElement#load\n */\n track.addEventListener('loadeddata', () => {\n readyState = HTMLTrackElement.LOADED;\n this.trigger({\n type: 'load',\n target: this\n });\n });\n }\n }\n HTMLTrackElement.prototype.allowedEvents_ = {\n load: 'load'\n };\n\n /**\n * The text track not loaded state.\n *\n * @type {number}\n * @static\n */\n HTMLTrackElement.NONE = 0;\n\n /**\n * The text track loading state.\n *\n * @type {number}\n * @static\n */\n HTMLTrackElement.LOADING = 1;\n\n /**\n * The text track loaded state.\n *\n * @type {number}\n * @static\n */\n HTMLTrackElement.LOADED = 2;\n\n /**\n * The text track failed to load state.\n *\n * @type {number}\n * @static\n */\n HTMLTrackElement.ERROR = 3;\n\n /*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\n const NORMAL = {\n audio: {\n ListClass: AudioTrackList,\n TrackClass: AudioTrack,\n capitalName: 'Audio'\n },\n video: {\n ListClass: VideoTrackList,\n TrackClass: VideoTrack,\n capitalName: 'Video'\n },\n text: {\n ListClass: TextTrackList,\n TrackClass: TextTrack,\n capitalName: 'Text'\n }\n };\n Object.keys(NORMAL).forEach(function (type) {\n NORMAL[type].getterName = `${type}Tracks`;\n NORMAL[type].privateName = `${type}Tracks_`;\n });\n const REMOTE = {\n remoteText: {\n ListClass: TextTrackList,\n TrackClass: TextTrack,\n capitalName: 'RemoteText',\n getterName: 'remoteTextTracks',\n privateName: 'remoteTextTracks_'\n },\n remoteTextEl: {\n ListClass: HtmlTrackElementList,\n TrackClass: HTMLTrackElement,\n capitalName: 'RemoteTextTrackEls',\n getterName: 'remoteTextTrackEls',\n privateName: 'remoteTextTrackEls_'\n }\n };\n const ALL = Object.assign({}, NORMAL, REMOTE);\n REMOTE.names = Object.keys(REMOTE);\n NORMAL.names = Object.keys(NORMAL);\n ALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n\n var minDoc = {};\n\n var topLevel = typeof commonjsGlobal !== 'undefined' ? commonjsGlobal : typeof window !== 'undefined' ? window : {};\n var doccy;\n if (typeof document !== 'undefined') {\n doccy = document;\n } else {\n doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n if (!doccy) {\n doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n }\n }\n var document_1 = doccy;\n\n /**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\n\n var _objCreate = Object.create || function () {\n function F() {}\n return function (o) {\n if (arguments.length !== 1) {\n throw new Error('Object.create shim only accepts one parameter.');\n }\n F.prototype = o;\n return new F();\n };\n }();\n\n // Creates a new ParserError object from an errorData object. The errorData\n // object should have default code and message properties. The default message\n // property can be overriden by passing in a message parameter.\n // See ParsingError.Errors below for acceptable errors.\n function ParsingError(errorData, message) {\n this.name = \"ParsingError\";\n this.code = errorData.code;\n this.message = message || errorData.message;\n }\n ParsingError.prototype = _objCreate(Error.prototype);\n ParsingError.prototype.constructor = ParsingError;\n\n // ParsingError metadata for acceptable ParsingErrors.\n ParsingError.Errors = {\n BadSignature: {\n code: 0,\n message: \"Malformed WebVTT signature.\"\n },\n BadTimeStamp: {\n code: 1,\n message: \"Malformed time stamp.\"\n }\n };\n\n // Try to parse input as a time stamp.\n function parseTimeStamp(input) {\n function computeSeconds(h, m, s, f) {\n return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n }\n var m = input.match(/^(\\d+):(\\d{1,2})(:\\d{1,2})?\\.(\\d{3})/);\n if (!m) {\n return null;\n }\n if (m[3]) {\n // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n } else if (m[1] > 59) {\n // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n // First position is hours as it's over 59.\n return computeSeconds(m[1], m[2], 0, m[4]);\n } else {\n // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n return computeSeconds(0, m[1], m[2], m[4]);\n }\n }\n\n // A settings object holds key/value pairs and will ignore anything but the first\n // assignment to a specific key.\n function Settings() {\n this.values = _objCreate(null);\n }\n Settings.prototype = {\n // Only accept the first assignment to any key.\n set: function (k, v) {\n if (!this.get(k) && v !== \"\") {\n this.values[k] = v;\n }\n },\n // Return the value for a key, or a default value.\n // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n // a number of possible default values as properties where 'defaultKey' is\n // the key of the property that will be chosen; otherwise it's assumed to be\n // a single value.\n get: function (k, dflt, defaultKey) {\n if (defaultKey) {\n return this.has(k) ? this.values[k] : dflt[defaultKey];\n }\n return this.has(k) ? this.values[k] : dflt;\n },\n // Check whether we have a value for a key.\n has: function (k) {\n return k in this.values;\n },\n // Accept a setting if its one of the given alternatives.\n alt: function (k, v, a) {\n for (var n = 0; n < a.length; ++n) {\n if (v === a[n]) {\n this.set(k, v);\n break;\n }\n }\n },\n // Accept a setting if its a valid (signed) integer.\n integer: function (k, v) {\n if (/^-?\\d+$/.test(v)) {\n // integer\n this.set(k, parseInt(v, 10));\n }\n },\n // Accept a setting if its a valid percentage.\n percent: function (k, v) {\n if (v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/)) {\n v = parseFloat(v);\n if (v >= 0 && v <= 100) {\n this.set(k, v);\n return true;\n }\n }\n return false;\n }\n };\n\n // Helper function to parse input into groups separated by 'groupDelim', and\n // interprete each group as a key/value pair separated by 'keyValueDelim'.\n function parseOptions(input, callback, keyValueDelim, groupDelim) {\n var groups = groupDelim ? input.split(groupDelim) : [input];\n for (var i in groups) {\n if (typeof groups[i] !== \"string\") {\n continue;\n }\n var kv = groups[i].split(keyValueDelim);\n if (kv.length !== 2) {\n continue;\n }\n var k = kv[0].trim();\n var v = kv[1].trim();\n callback(k, v);\n }\n }\n function parseCue(input, cue, regionList) {\n // Remember the original input if we need to throw an error.\n var oInput = input;\n // 4.1 WebVTT timestamp\n function consumeTimeStamp() {\n var ts = parseTimeStamp(input);\n if (ts === null) {\n throw new ParsingError(ParsingError.Errors.BadTimeStamp, \"Malformed timestamp: \" + oInput);\n }\n // Remove time stamp from input.\n input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n return ts;\n }\n\n // 4.4.2 WebVTT cue settings\n function consumeCueSettings(input, cue) {\n var settings = new Settings();\n parseOptions(input, function (k, v) {\n switch (k) {\n case \"region\":\n // Find the last region we parsed with the same region id.\n for (var i = regionList.length - 1; i >= 0; i--) {\n if (regionList[i].id === v) {\n settings.set(k, regionList[i].region);\n break;\n }\n }\n break;\n case \"vertical\":\n settings.alt(k, v, [\"rl\", \"lr\"]);\n break;\n case \"line\":\n var vals = v.split(\",\"),\n vals0 = vals[0];\n settings.integer(k, vals0);\n settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n settings.alt(k, vals0, [\"auto\"]);\n if (vals.length === 2) {\n settings.alt(\"lineAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n }\n break;\n case \"position\":\n vals = v.split(\",\");\n settings.percent(k, vals[0]);\n if (vals.length === 2) {\n settings.alt(\"positionAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n }\n break;\n case \"size\":\n settings.percent(k, v);\n break;\n case \"align\":\n settings.alt(k, v, [\"start\", \"center\", \"end\", \"left\", \"right\"]);\n break;\n }\n }, /:/, /\\s/);\n\n // Apply default values for any missing fields.\n cue.region = settings.get(\"region\", null);\n cue.vertical = settings.get(\"vertical\", \"\");\n try {\n cue.line = settings.get(\"line\", \"auto\");\n } catch (e) {}\n cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n cue.snapToLines = settings.get(\"snapToLines\", true);\n cue.size = settings.get(\"size\", 100);\n // Safari still uses the old middle value and won't accept center\n try {\n cue.align = settings.get(\"align\", \"center\");\n } catch (e) {\n cue.align = settings.get(\"align\", \"middle\");\n }\n try {\n cue.position = settings.get(\"position\", \"auto\");\n } catch (e) {\n cue.position = settings.get(\"position\", {\n start: 0,\n left: 0,\n center: 50,\n middle: 50,\n end: 100,\n right: 100\n }, cue.align);\n }\n cue.positionAlign = settings.get(\"positionAlign\", {\n start: \"start\",\n left: \"start\",\n center: \"center\",\n middle: \"center\",\n end: \"end\",\n right: \"end\"\n }, cue.align);\n }\n function skipWhitespace() {\n input = input.replace(/^\\s+/, \"\");\n }\n\n // 4.1 WebVTT cue timings.\n skipWhitespace();\n cue.startTime = consumeTimeStamp(); // (1) collect cue start time\n skipWhitespace();\n if (input.substr(0, 3) !== \"-->\") {\n // (3) next characters must match \"-->\"\n throw new ParsingError(ParsingError.Errors.BadTimeStamp, \"Malformed time stamp (time stamps must be separated by '-->'): \" + oInput);\n }\n input = input.substr(3);\n skipWhitespace();\n cue.endTime = consumeTimeStamp(); // (5) collect cue end time\n\n // 4.1 WebVTT cue settings list.\n skipWhitespace();\n consumeCueSettings(input, cue);\n }\n\n // When evaluating this file as part of a Webpack bundle for server\n // side rendering, `document` is an empty object.\n var TEXTAREA_ELEMENT = document_1.createElement && document_1.createElement(\"textarea\");\n var TAG_NAME = {\n c: \"span\",\n i: \"i\",\n b: \"b\",\n u: \"u\",\n ruby: \"ruby\",\n rt: \"rt\",\n v: \"span\",\n lang: \"span\"\n };\n\n // 5.1 default text color\n // 5.2 default text background color is equivalent to text color with bg_ prefix\n var DEFAULT_COLOR_CLASS = {\n white: 'rgba(255,255,255,1)',\n lime: 'rgba(0,255,0,1)',\n cyan: 'rgba(0,255,255,1)',\n red: 'rgba(255,0,0,1)',\n yellow: 'rgba(255,255,0,1)',\n magenta: 'rgba(255,0,255,1)',\n blue: 'rgba(0,0,255,1)',\n black: 'rgba(0,0,0,1)'\n };\n var TAG_ANNOTATION = {\n v: \"title\",\n lang: \"lang\"\n };\n var NEEDS_PARENT = {\n rt: \"ruby\"\n };\n\n // Parse content into a document fragment.\n function parseContent(window, input) {\n function nextToken() {\n // Check for end-of-string.\n if (!input) {\n return null;\n }\n\n // Consume 'n' characters from the input.\n function consume(result) {\n input = input.substr(result.length);\n return result;\n }\n var m = input.match(/^([^<]*)(<[^>]*>?)?/);\n // If there is some text before the next tag, return it, otherwise return\n // the tag.\n return consume(m[1] ? m[1] : m[2]);\n }\n function unescape(s) {\n TEXTAREA_ELEMENT.innerHTML = s;\n s = TEXTAREA_ELEMENT.textContent;\n TEXTAREA_ELEMENT.textContent = \"\";\n return s;\n }\n function shouldAdd(current, element) {\n return !NEEDS_PARENT[element.localName] || NEEDS_PARENT[element.localName] === current.localName;\n }\n\n // Create an element for this tag.\n function createElement(type, annotation) {\n var tagName = TAG_NAME[type];\n if (!tagName) {\n return null;\n }\n var element = window.document.createElement(tagName);\n var name = TAG_ANNOTATION[type];\n if (name && annotation) {\n element[name] = annotation.trim();\n }\n return element;\n }\n var rootDiv = window.document.createElement(\"div\"),\n current = rootDiv,\n t,\n tagStack = [];\n while ((t = nextToken()) !== null) {\n if (t[0] === '<') {\n if (t[1] === \"/\") {\n // If the closing tag matches, move back up to the parent node.\n if (tagStack.length && tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n tagStack.pop();\n current = current.parentNode;\n }\n // Otherwise just ignore the end tag.\n continue;\n }\n var ts = parseTimeStamp(t.substr(1, t.length - 2));\n var node;\n if (ts) {\n // Timestamps are lead nodes as well.\n node = window.document.createProcessingInstruction(\"timestamp\", ts);\n current.appendChild(node);\n continue;\n }\n var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/);\n // If we can't parse the tag, skip to the next tag.\n if (!m) {\n continue;\n }\n // Try to construct an element, and ignore the tag if we couldn't.\n node = createElement(m[1], m[3]);\n if (!node) {\n continue;\n }\n // Determine if the tag should be added based on the context of where it\n // is placed in the cuetext.\n if (!shouldAdd(current, node)) {\n continue;\n }\n // Set the class list (as a list of classes, separated by space).\n if (m[2]) {\n var classes = m[2].split('.');\n classes.forEach(function (cl) {\n var bgColor = /^bg_/.test(cl);\n // slice out `bg_` if it's a background color\n var colorName = bgColor ? cl.slice(3) : cl;\n if (DEFAULT_COLOR_CLASS.hasOwnProperty(colorName)) {\n var propName = bgColor ? 'background-color' : 'color';\n var propValue = DEFAULT_COLOR_CLASS[colorName];\n node.style[propName] = propValue;\n }\n });\n node.className = classes.join(' ');\n }\n // Append the node to the current node, and enter the scope of the new\n // node.\n tagStack.push(m[1]);\n current.appendChild(node);\n current = node;\n continue;\n }\n\n // Text nodes are leaf nodes.\n current.appendChild(window.document.createTextNode(unescape(t)));\n }\n return rootDiv;\n }\n\n // This is a list of all the Unicode characters that have a strong\n // right-to-left category. What this means is that these characters are\n // written right-to-left for sure. It was generated by pulling all the strong\n // right-to-left characters out of the Unicode data table. That table can\n // found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\n var strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6], [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d], [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6], [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5], [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815], [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858], [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f], [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c], [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1], [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc], [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808], [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855], [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f], [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13], [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58], [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72], [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f], [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32], [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42], [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f], [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59], [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62], [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77], [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b], [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n function isStrongRTLChar(charCode) {\n for (var i = 0; i < strongRTLRanges.length; i++) {\n var currentRange = strongRTLRanges[i];\n if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n return true;\n }\n }\n return false;\n }\n function determineBidi(cueDiv) {\n var nodeStack = [],\n text = \"\",\n charCode;\n if (!cueDiv || !cueDiv.childNodes) {\n return \"ltr\";\n }\n function pushNodes(nodeStack, node) {\n for (var i = node.childNodes.length - 1; i >= 0; i--) {\n nodeStack.push(node.childNodes[i]);\n }\n }\n function nextTextNode(nodeStack) {\n if (!nodeStack || !nodeStack.length) {\n return null;\n }\n var node = nodeStack.pop(),\n text = node.textContent || node.innerText;\n if (text) {\n // TODO: This should match all unicode type B characters (paragraph\n // separator characters). See issue #115.\n var m = text.match(/^.*(\\n|\\r)/);\n if (m) {\n nodeStack.length = 0;\n return m[0];\n }\n return text;\n }\n if (node.tagName === \"ruby\") {\n return nextTextNode(nodeStack);\n }\n if (node.childNodes) {\n pushNodes(nodeStack, node);\n return nextTextNode(nodeStack);\n }\n }\n pushNodes(nodeStack, cueDiv);\n while (text = nextTextNode(nodeStack)) {\n for (var i = 0; i < text.length; i++) {\n charCode = text.charCodeAt(i);\n if (isStrongRTLChar(charCode)) {\n return \"rtl\";\n }\n }\n }\n return \"ltr\";\n }\n function computeLinePos(cue) {\n if (typeof cue.line === \"number\" && (cue.snapToLines || cue.line >= 0 && cue.line <= 100)) {\n return cue.line;\n }\n if (!cue.track || !cue.track.textTrackList || !cue.track.textTrackList.mediaElement) {\n return -1;\n }\n var track = cue.track,\n trackList = track.textTrackList,\n count = 0;\n for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n if (trackList[i].mode === \"showing\") {\n count++;\n }\n }\n return ++count * -1;\n }\n function StyleBox() {}\n\n // Apply styles to a div. If there is no div passed then it defaults to the\n // div on 'this'.\n StyleBox.prototype.applyStyles = function (styles, div) {\n div = div || this.div;\n for (var prop in styles) {\n if (styles.hasOwnProperty(prop)) {\n div.style[prop] = styles[prop];\n }\n }\n };\n StyleBox.prototype.formatStyle = function (val, unit) {\n return val === 0 ? 0 : val + unit;\n };\n\n // Constructs the computed display state of the cue (a div). Places the div\n // into the overlay which should be a block level element (usually a div).\n function CueStyleBox(window, cue, styleOptions) {\n StyleBox.call(this);\n this.cue = cue;\n\n // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n // have inline positioning and will function as the cue background box.\n this.cueDiv = parseContent(window, cue.text);\n var styles = {\n color: \"rgba(255, 255, 255, 1)\",\n backgroundColor: \"rgba(0, 0, 0, 0.8)\",\n position: \"relative\",\n left: 0,\n right: 0,\n top: 0,\n bottom: 0,\n display: \"inline\",\n writingMode: cue.vertical === \"\" ? \"horizontal-tb\" : cue.vertical === \"lr\" ? \"vertical-lr\" : \"vertical-rl\",\n unicodeBidi: \"plaintext\"\n };\n this.applyStyles(styles, this.cueDiv);\n\n // Create an absolutely positioned div that will be used to position the cue\n // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n // mirrors of them except middle instead of center on Safari.\n this.div = window.document.createElement(\"div\");\n styles = {\n direction: determineBidi(this.cueDiv),\n writingMode: cue.vertical === \"\" ? \"horizontal-tb\" : cue.vertical === \"lr\" ? \"vertical-lr\" : \"vertical-rl\",\n unicodeBidi: \"plaintext\",\n textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n font: styleOptions.font,\n whiteSpace: \"pre-line\",\n position: \"absolute\"\n };\n this.applyStyles(styles);\n this.div.appendChild(this.cueDiv);\n\n // Calculate the distance from the reference edge of the viewport to the text\n // position of the cue box. The reference edge will be resolved later when\n // the box orientation styles are applied.\n var textPos = 0;\n switch (cue.positionAlign) {\n case \"start\":\n textPos = cue.position;\n break;\n case \"center\":\n textPos = cue.position - cue.size / 2;\n break;\n case \"end\":\n textPos = cue.position - cue.size;\n break;\n }\n\n // Horizontal box orientation; textPos is the distance from the left edge of the\n // area to the left edge of the box and cue.size is the distance extending to\n // the right from there.\n if (cue.vertical === \"\") {\n this.applyStyles({\n left: this.formatStyle(textPos, \"%\"),\n width: this.formatStyle(cue.size, \"%\")\n });\n // Vertical box orientation; textPos is the distance from the top edge of the\n // area to the top edge of the box and cue.size is the height extending\n // downwards from there.\n } else {\n this.applyStyles({\n top: this.formatStyle(textPos, \"%\"),\n height: this.formatStyle(cue.size, \"%\")\n });\n }\n this.move = function (box) {\n this.applyStyles({\n top: this.formatStyle(box.top, \"px\"),\n bottom: this.formatStyle(box.bottom, \"px\"),\n left: this.formatStyle(box.left, \"px\"),\n right: this.formatStyle(box.right, \"px\"),\n height: this.formatStyle(box.height, \"px\"),\n width: this.formatStyle(box.width, \"px\")\n });\n };\n }\n CueStyleBox.prototype = _objCreate(StyleBox.prototype);\n CueStyleBox.prototype.constructor = CueStyleBox;\n\n // Represents the co-ordinates of an Element in a way that we can easily\n // compute things with such as if it overlaps or intersects with another Element.\n // Can initialize it with either a StyleBox or another BoxPosition.\n function BoxPosition(obj) {\n // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n // was passed in and we need to copy the results of 'getBoundingClientRect'\n // as the object returned is readonly. All co-ordinate values are in reference\n // to the viewport origin (top left).\n var lh, height, width, top;\n if (obj.div) {\n height = obj.div.offsetHeight;\n width = obj.div.offsetWidth;\n top = obj.div.offsetTop;\n var rects = (rects = obj.div.childNodes) && (rects = rects[0]) && rects.getClientRects && rects.getClientRects();\n obj = obj.div.getBoundingClientRect();\n // In certain cases the outter div will be slightly larger then the sum of\n // the inner div's lines. This could be due to bold text, etc, on some platforms.\n // In this case we should get the average line height and use that. This will\n // result in the desired behaviour.\n lh = rects ? Math.max(rects[0] && rects[0].height || 0, obj.height / rects.length) : 0;\n }\n this.left = obj.left;\n this.right = obj.right;\n this.top = obj.top || top;\n this.height = obj.height || height;\n this.bottom = obj.bottom || top + (obj.height || height);\n this.width = obj.width || width;\n this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n }\n\n // Move the box along a particular axis. Optionally pass in an amount to move\n // the box. If no amount is passed then the default is the line height of the\n // box.\n BoxPosition.prototype.move = function (axis, toMove) {\n toMove = toMove !== undefined ? toMove : this.lineHeight;\n switch (axis) {\n case \"+x\":\n this.left += toMove;\n this.right += toMove;\n break;\n case \"-x\":\n this.left -= toMove;\n this.right -= toMove;\n break;\n case \"+y\":\n this.top += toMove;\n this.bottom += toMove;\n break;\n case \"-y\":\n this.top -= toMove;\n this.bottom -= toMove;\n break;\n }\n };\n\n // Check if this box overlaps another box, b2.\n BoxPosition.prototype.overlaps = function (b2) {\n return this.left < b2.right && this.right > b2.left && this.top < b2.bottom && this.bottom > b2.top;\n };\n\n // Check if this box overlaps any other boxes in boxes.\n BoxPosition.prototype.overlapsAny = function (boxes) {\n for (var i = 0; i < boxes.length; i++) {\n if (this.overlaps(boxes[i])) {\n return true;\n }\n }\n return false;\n };\n\n // Check if this box is within another box.\n BoxPosition.prototype.within = function (container) {\n return this.top >= container.top && this.bottom <= container.bottom && this.left >= container.left && this.right <= container.right;\n };\n\n // Check if this box is entirely within the container or it is overlapping\n // on the edge opposite of the axis direction passed. For example, if \"+x\" is\n // passed and the box is overlapping on the left edge of the container, then\n // return true.\n BoxPosition.prototype.overlapsOppositeAxis = function (container, axis) {\n switch (axis) {\n case \"+x\":\n return this.left < container.left;\n case \"-x\":\n return this.right > container.right;\n case \"+y\":\n return this.top < container.top;\n case \"-y\":\n return this.bottom > container.bottom;\n }\n };\n\n // Find the percentage of the area that this box is overlapping with another\n // box.\n BoxPosition.prototype.intersectPercentage = function (b2) {\n var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n intersectArea = x * y;\n return intersectArea / (this.height * this.width);\n };\n\n // Convert the positions from this box to CSS compatible positions using\n // the reference container's positions. This has to be done because this\n // box's positions are in reference to the viewport origin, whereas, CSS\n // values are in referecne to their respective edges.\n BoxPosition.prototype.toCSSCompatValues = function (reference) {\n return {\n top: this.top - reference.top,\n bottom: reference.bottom - this.bottom,\n left: this.left - reference.left,\n right: reference.right - this.right,\n height: this.height,\n width: this.width\n };\n };\n\n // Get an object that represents the box's position without anything extra.\n // Can pass a StyleBox, HTMLElement, or another BoxPositon.\n BoxPosition.getSimpleBoxPosition = function (obj) {\n var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n obj = obj.div ? obj.div.getBoundingClientRect() : obj.tagName ? obj.getBoundingClientRect() : obj;\n var ret = {\n left: obj.left,\n right: obj.right,\n top: obj.top || top,\n height: obj.height || height,\n bottom: obj.bottom || top + (obj.height || height),\n width: obj.width || width\n };\n return ret;\n };\n\n // Move a StyleBox to its specified, or next best, position. The containerBox\n // is the box that contains the StyleBox, such as a div. boxPositions are\n // a list of other boxes that the styleBox can't overlap with.\n function moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n // Find the best position for a cue box, b, on the video. The axis parameter\n // is a list of axis, the order of which, it will move the box along. For example:\n // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n // direction. If it doesn't find a good position for it there it will then move\n // it along the x axis in the negative direction.\n function findBestPosition(b, axis) {\n var bestPosition,\n specifiedPosition = new BoxPosition(b),\n percentage = 1; // Highest possible so the first thing we get is better.\n\n for (var i = 0; i < axis.length; i++) {\n while (b.overlapsOppositeAxis(containerBox, axis[i]) || b.within(containerBox) && b.overlapsAny(boxPositions)) {\n b.move(axis[i]);\n }\n // We found a spot where we aren't overlapping anything. This is our\n // best position.\n if (b.within(containerBox)) {\n return b;\n }\n var p = b.intersectPercentage(containerBox);\n // If we're outside the container box less then we were on our last try\n // then remember this position as the best position.\n if (percentage > p) {\n bestPosition = new BoxPosition(b);\n percentage = p;\n }\n // Reset the box position to the specified position.\n b = new BoxPosition(specifiedPosition);\n }\n return bestPosition || specifiedPosition;\n }\n var boxPosition = new BoxPosition(styleBox),\n cue = styleBox.cue,\n linePos = computeLinePos(cue),\n axis = [];\n\n // If we have a line number to align the cue to.\n if (cue.snapToLines) {\n var size;\n switch (cue.vertical) {\n case \"\":\n axis = [\"+y\", \"-y\"];\n size = \"height\";\n break;\n case \"rl\":\n axis = [\"+x\", \"-x\"];\n size = \"width\";\n break;\n case \"lr\":\n axis = [\"-x\", \"+x\"];\n size = \"width\";\n break;\n }\n var step = boxPosition.lineHeight,\n position = step * Math.round(linePos),\n maxPosition = containerBox[size] + step,\n initialAxis = axis[0];\n\n // If the specified intial position is greater then the max position then\n // clamp the box to the amount of steps it would take for the box to\n // reach the max position.\n if (Math.abs(position) > maxPosition) {\n position = position < 0 ? -1 : 1;\n position *= Math.ceil(maxPosition / step) * step;\n }\n\n // If computed line position returns negative then line numbers are\n // relative to the bottom of the video instead of the top. Therefore, we\n // need to increase our initial position by the length or width of the\n // video, depending on the writing direction, and reverse our axis directions.\n if (linePos < 0) {\n position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n axis = axis.reverse();\n }\n\n // Move the box to the specified position. This may not be its best\n // position.\n boxPosition.move(initialAxis, position);\n } else {\n // If we have a percentage line value for the cue.\n var calculatedPercentage = boxPosition.lineHeight / containerBox.height * 100;\n switch (cue.lineAlign) {\n case \"center\":\n linePos -= calculatedPercentage / 2;\n break;\n case \"end\":\n linePos -= calculatedPercentage;\n break;\n }\n\n // Apply initial line position to the cue box.\n switch (cue.vertical) {\n case \"\":\n styleBox.applyStyles({\n top: styleBox.formatStyle(linePos, \"%\")\n });\n break;\n case \"rl\":\n styleBox.applyStyles({\n left: styleBox.formatStyle(linePos, \"%\")\n });\n break;\n case \"lr\":\n styleBox.applyStyles({\n right: styleBox.formatStyle(linePos, \"%\")\n });\n break;\n }\n axis = [\"+y\", \"-x\", \"+x\", \"-y\"];\n\n // Get the box position again after we've applied the specified positioning\n // to it.\n boxPosition = new BoxPosition(styleBox);\n }\n var bestPosition = findBestPosition(boxPosition, axis);\n styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n }\n function WebVTT$1() {\n // Nothing\n }\n\n // Helper to allow strings to be decoded instead of the default binary utf8 data.\n WebVTT$1.StringDecoder = function () {\n return {\n decode: function (data) {\n if (!data) {\n return \"\";\n }\n if (typeof data !== \"string\") {\n throw new Error(\"Error - expected string data.\");\n }\n return decodeURIComponent(encodeURIComponent(data));\n }\n };\n };\n WebVTT$1.convertCueToDOMTree = function (window, cuetext) {\n if (!window || !cuetext) {\n return null;\n }\n return parseContent(window, cuetext);\n };\n var FONT_SIZE_PERCENT = 0.05;\n var FONT_STYLE = \"sans-serif\";\n var CUE_BACKGROUND_PADDING = \"1.5%\";\n\n // Runs the processing model over the cues and regions passed to it.\n // @param overlay A block level element (usually a div) that the computed cues\n // and regions will be placed into.\n WebVTT$1.processCues = function (window, cues, overlay) {\n if (!window || !cues || !overlay) {\n return null;\n }\n\n // Remove all previous children.\n while (overlay.firstChild) {\n overlay.removeChild(overlay.firstChild);\n }\n var paddedOverlay = window.document.createElement(\"div\");\n paddedOverlay.style.position = \"absolute\";\n paddedOverlay.style.left = \"0\";\n paddedOverlay.style.right = \"0\";\n paddedOverlay.style.top = \"0\";\n paddedOverlay.style.bottom = \"0\";\n paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n overlay.appendChild(paddedOverlay);\n\n // Determine if we need to compute the display states of the cues. This could\n // be the case if a cue's state has been changed since the last computation or\n // if it has not been computed yet.\n function shouldCompute(cues) {\n for (var i = 0; i < cues.length; i++) {\n if (cues[i].hasBeenReset || !cues[i].displayState) {\n return true;\n }\n }\n return false;\n }\n\n // We don't need to recompute the cues' display states. Just reuse them.\n if (!shouldCompute(cues)) {\n for (var i = 0; i < cues.length; i++) {\n paddedOverlay.appendChild(cues[i].displayState);\n }\n return;\n }\n var boxPositions = [],\n containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n var styleOptions = {\n font: fontSize + \"px \" + FONT_STYLE\n };\n (function () {\n var styleBox, cue;\n for (var i = 0; i < cues.length; i++) {\n cue = cues[i];\n\n // Compute the intial position and styles of the cue div.\n styleBox = new CueStyleBox(window, cue, styleOptions);\n paddedOverlay.appendChild(styleBox.div);\n\n // Move the cue div to it's correct line position.\n moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);\n\n // Remember the computed div so that we don't have to recompute it later\n // if we don't have too.\n cue.displayState = styleBox.div;\n boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n }\n })();\n };\n WebVTT$1.Parser = function (window, vttjs, decoder) {\n if (!decoder) {\n decoder = vttjs;\n vttjs = {};\n }\n if (!vttjs) {\n vttjs = {};\n }\n this.window = window;\n this.vttjs = vttjs;\n this.state = \"INITIAL\";\n this.buffer = \"\";\n this.decoder = decoder || new TextDecoder(\"utf8\");\n this.regionList = [];\n };\n WebVTT$1.Parser.prototype = {\n // If the error is a ParsingError then report it to the consumer if\n // possible. If it's not a ParsingError then throw it like normal.\n reportOrThrowError: function (e) {\n if (e instanceof ParsingError) {\n this.onparsingerror && this.onparsingerror(e);\n } else {\n throw e;\n }\n },\n parse: function (data) {\n var self = this;\n\n // If there is no data then we won't decode it, but will just try to parse\n // whatever is in buffer already. This may occur in circumstances, for\n // example when flush() is called.\n if (data) {\n // Try to decode the data that we received.\n self.buffer += self.decoder.decode(data, {\n stream: true\n });\n }\n function collectNextLine() {\n var buffer = self.buffer;\n var pos = 0;\n while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n ++pos;\n }\n var line = buffer.substr(0, pos);\n // Advance the buffer early in case we fail below.\n if (buffer[pos] === '\\r') {\n ++pos;\n }\n if (buffer[pos] === '\\n') {\n ++pos;\n }\n self.buffer = buffer.substr(pos);\n return line;\n }\n\n // 3.4 WebVTT region and WebVTT region settings syntax\n function parseRegion(input) {\n var settings = new Settings();\n parseOptions(input, function (k, v) {\n switch (k) {\n case \"id\":\n settings.set(k, v);\n break;\n case \"width\":\n settings.percent(k, v);\n break;\n case \"lines\":\n settings.integer(k, v);\n break;\n case \"regionanchor\":\n case \"viewportanchor\":\n var xy = v.split(',');\n if (xy.length !== 2) {\n break;\n }\n // We have to make sure both x and y parse, so use a temporary\n // settings object here.\n var anchor = new Settings();\n anchor.percent(\"x\", xy[0]);\n anchor.percent(\"y\", xy[1]);\n if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n break;\n }\n settings.set(k + \"X\", anchor.get(\"x\"));\n settings.set(k + \"Y\", anchor.get(\"y\"));\n break;\n case \"scroll\":\n settings.alt(k, v, [\"up\"]);\n break;\n }\n }, /=/, /\\s/);\n\n // Create the region, using default values for any values that were not\n // specified.\n if (settings.has(\"id\")) {\n var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n region.width = settings.get(\"width\", 100);\n region.lines = settings.get(\"lines\", 3);\n region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n region.scroll = settings.get(\"scroll\", \"\");\n // Register the region.\n self.onregion && self.onregion(region);\n // Remember the VTTRegion for later in case we parse any VTTCues that\n // reference it.\n self.regionList.push({\n id: settings.get(\"id\"),\n region: region\n });\n }\n }\n\n // draft-pantos-http-live-streaming-20\n // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n // 3.5 WebVTT\n function parseTimestampMap(input) {\n var settings = new Settings();\n parseOptions(input, function (k, v) {\n switch (k) {\n case \"MPEGT\":\n settings.integer(k + 'S', v);\n break;\n case \"LOCA\":\n settings.set(k + 'L', parseTimeStamp(v));\n break;\n }\n }, /[^\\d]:/, /,/);\n self.ontimestampmap && self.ontimestampmap({\n \"MPEGTS\": settings.get(\"MPEGTS\"),\n \"LOCAL\": settings.get(\"LOCAL\")\n });\n }\n\n // 3.2 WebVTT metadata header syntax\n function parseHeader(input) {\n if (input.match(/X-TIMESTAMP-MAP/)) {\n // This line contains HLS X-TIMESTAMP-MAP metadata\n parseOptions(input, function (k, v) {\n switch (k) {\n case \"X-TIMESTAMP-MAP\":\n parseTimestampMap(v);\n break;\n }\n }, /=/);\n } else {\n parseOptions(input, function (k, v) {\n switch (k) {\n case \"Region\":\n // 3.3 WebVTT region metadata header syntax\n parseRegion(v);\n break;\n }\n }, /:/);\n }\n }\n\n // 5.1 WebVTT file parsing.\n try {\n var line;\n if (self.state === \"INITIAL\") {\n // We can't start parsing until we have the first line.\n if (!/\\r\\n|\\n/.test(self.buffer)) {\n return this;\n }\n line = collectNextLine();\n var m = line.match(/^WEBVTT([ \\t].*)?$/);\n if (!m || !m[0]) {\n throw new ParsingError(ParsingError.Errors.BadSignature);\n }\n self.state = \"HEADER\";\n }\n var alreadyCollectedLine = false;\n while (self.buffer) {\n // We can't parse a line until we have the full line.\n if (!/\\r\\n|\\n/.test(self.buffer)) {\n return this;\n }\n if (!alreadyCollectedLine) {\n line = collectNextLine();\n } else {\n alreadyCollectedLine = false;\n }\n switch (self.state) {\n case \"HEADER\":\n // 13-18 - Allow a header (metadata) under the WEBVTT line.\n if (/:/.test(line)) {\n parseHeader(line);\n } else if (!line) {\n // An empty line terminates the header and starts the body (cues).\n self.state = \"ID\";\n }\n continue;\n case \"NOTE\":\n // Ignore NOTE blocks.\n if (!line) {\n self.state = \"ID\";\n }\n continue;\n case \"ID\":\n // Check for the start of NOTE blocks.\n if (/^NOTE($|[ \\t])/.test(line)) {\n self.state = \"NOTE\";\n break;\n }\n // 19-29 - Allow any number of line terminators, then initialize new cue values.\n if (!line) {\n continue;\n }\n self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n // Safari still uses the old middle value and won't accept center\n try {\n self.cue.align = \"center\";\n } catch (e) {\n self.cue.align = \"middle\";\n }\n self.state = \"CUE\";\n // 30-39 - Check if self line contains an optional identifier or timing data.\n if (line.indexOf(\"-->\") === -1) {\n self.cue.id = line;\n continue;\n }\n // Process line as start of a cue.\n /*falls through*/\n case \"CUE\":\n // 40 - Collect cue timings and settings.\n try {\n parseCue(line, self.cue, self.regionList);\n } catch (e) {\n self.reportOrThrowError(e);\n // In case of an error ignore rest of the cue.\n self.cue = null;\n self.state = \"BADCUE\";\n continue;\n }\n self.state = \"CUETEXT\";\n continue;\n case \"CUETEXT\":\n var hasSubstring = line.indexOf(\"-->\") !== -1;\n // 34 - If we have an empty line then report the cue.\n // 35 - If we have the special substring '-->' then report the cue,\n // but do not collect the line as we need to process the current\n // one as a new cue.\n if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n // We are done parsing self cue.\n self.oncue && self.oncue(self.cue);\n self.cue = null;\n self.state = \"ID\";\n continue;\n }\n if (self.cue.text) {\n self.cue.text += \"\\n\";\n }\n self.cue.text += line.replace(/\\u2028/g, '\\n').replace(/u2029/g, '\\n');\n continue;\n case \"BADCUE\":\n // BADCUE\n // 54-62 - Collect and discard the remaining cue.\n if (!line) {\n self.state = \"ID\";\n }\n continue;\n }\n }\n } catch (e) {\n self.reportOrThrowError(e);\n\n // If we are currently parsing a cue, report what we have.\n if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n self.oncue(self.cue);\n }\n self.cue = null;\n // Enter BADWEBVTT state if header was not parsed correctly otherwise\n // another exception occurred so enter BADCUE state.\n self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n }\n return this;\n },\n flush: function () {\n var self = this;\n try {\n // Finish decoding the stream.\n self.buffer += self.decoder.decode();\n // Synthesize the end of the current cue or region.\n if (self.cue || self.state === \"HEADER\") {\n self.buffer += \"\\n\\n\";\n self.parse();\n }\n // If we've flushed, parsed, and we're still on the INITIAL state then\n // that means we don't have enough of the stream to parse the first\n // line.\n if (self.state === \"INITIAL\") {\n throw new ParsingError(ParsingError.Errors.BadSignature);\n }\n } catch (e) {\n self.reportOrThrowError(e);\n }\n self.onflush && self.onflush();\n return this;\n }\n };\n var vtt = WebVTT$1;\n\n /**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n var autoKeyword = \"auto\";\n var directionSetting = {\n \"\": 1,\n \"lr\": 1,\n \"rl\": 1\n };\n var alignSetting = {\n \"start\": 1,\n \"center\": 1,\n \"end\": 1,\n \"left\": 1,\n \"right\": 1,\n \"auto\": 1,\n \"line-left\": 1,\n \"line-right\": 1\n };\n function findDirectionSetting(value) {\n if (typeof value !== \"string\") {\n return false;\n }\n var dir = directionSetting[value.toLowerCase()];\n return dir ? value.toLowerCase() : false;\n }\n function findAlignSetting(value) {\n if (typeof value !== \"string\") {\n return false;\n }\n var align = alignSetting[value.toLowerCase()];\n return align ? value.toLowerCase() : false;\n }\n function VTTCue(startTime, endTime, text) {\n /**\n * Shim implementation specific properties. These properties are not in\n * the spec.\n */\n\n // Lets us know when the VTTCue's data has changed in such a way that we need\n // to recompute its display state. This lets us compute its display state\n // lazily.\n this.hasBeenReset = false;\n\n /**\n * VTTCue and TextTrackCue properties\n * http://dev.w3.org/html5/webvtt/#vttcue-interface\n */\n\n var _id = \"\";\n var _pauseOnExit = false;\n var _startTime = startTime;\n var _endTime = endTime;\n var _text = text;\n var _region = null;\n var _vertical = \"\";\n var _snapToLines = true;\n var _line = \"auto\";\n var _lineAlign = \"start\";\n var _position = \"auto\";\n var _positionAlign = \"auto\";\n var _size = 100;\n var _align = \"center\";\n Object.defineProperties(this, {\n \"id\": {\n enumerable: true,\n get: function () {\n return _id;\n },\n set: function (value) {\n _id = \"\" + value;\n }\n },\n \"pauseOnExit\": {\n enumerable: true,\n get: function () {\n return _pauseOnExit;\n },\n set: function (value) {\n _pauseOnExit = !!value;\n }\n },\n \"startTime\": {\n enumerable: true,\n get: function () {\n return _startTime;\n },\n set: function (value) {\n if (typeof value !== \"number\") {\n throw new TypeError(\"Start time must be set to a number.\");\n }\n _startTime = value;\n this.hasBeenReset = true;\n }\n },\n \"endTime\": {\n enumerable: true,\n get: function () {\n return _endTime;\n },\n set: function (value) {\n if (typeof value !== \"number\") {\n throw new TypeError(\"End time must be set to a number.\");\n }\n _endTime = value;\n this.hasBeenReset = true;\n }\n },\n \"text\": {\n enumerable: true,\n get: function () {\n return _text;\n },\n set: function (value) {\n _text = \"\" + value;\n this.hasBeenReset = true;\n }\n },\n \"region\": {\n enumerable: true,\n get: function () {\n return _region;\n },\n set: function (value) {\n _region = value;\n this.hasBeenReset = true;\n }\n },\n \"vertical\": {\n enumerable: true,\n get: function () {\n return _vertical;\n },\n set: function (value) {\n var setting = findDirectionSetting(value);\n // Have to check for false because the setting an be an empty string.\n if (setting === false) {\n throw new SyntaxError(\"Vertical: an invalid or illegal direction string was specified.\");\n }\n _vertical = setting;\n this.hasBeenReset = true;\n }\n },\n \"snapToLines\": {\n enumerable: true,\n get: function () {\n return _snapToLines;\n },\n set: function (value) {\n _snapToLines = !!value;\n this.hasBeenReset = true;\n }\n },\n \"line\": {\n enumerable: true,\n get: function () {\n return _line;\n },\n set: function (value) {\n if (typeof value !== \"number\" && value !== autoKeyword) {\n throw new SyntaxError(\"Line: an invalid number or illegal string was specified.\");\n }\n _line = value;\n this.hasBeenReset = true;\n }\n },\n \"lineAlign\": {\n enumerable: true,\n get: function () {\n return _lineAlign;\n },\n set: function (value) {\n var setting = findAlignSetting(value);\n if (!setting) {\n console.warn(\"lineAlign: an invalid or illegal string was specified.\");\n } else {\n _lineAlign = setting;\n this.hasBeenReset = true;\n }\n }\n },\n \"position\": {\n enumerable: true,\n get: function () {\n return _position;\n },\n set: function (value) {\n if (value < 0 || value > 100) {\n throw new Error(\"Position must be between 0 and 100.\");\n }\n _position = value;\n this.hasBeenReset = true;\n }\n },\n \"positionAlign\": {\n enumerable: true,\n get: function () {\n return _positionAlign;\n },\n set: function (value) {\n var setting = findAlignSetting(value);\n if (!setting) {\n console.warn(\"positionAlign: an invalid or illegal string was specified.\");\n } else {\n _positionAlign = setting;\n this.hasBeenReset = true;\n }\n }\n },\n \"size\": {\n enumerable: true,\n get: function () {\n return _size;\n },\n set: function (value) {\n if (value < 0 || value > 100) {\n throw new Error(\"Size must be between 0 and 100.\");\n }\n _size = value;\n this.hasBeenReset = true;\n }\n },\n \"align\": {\n enumerable: true,\n get: function () {\n return _align;\n },\n set: function (value) {\n var setting = findAlignSetting(value);\n if (!setting) {\n throw new SyntaxError(\"align: an invalid or illegal alignment string was specified.\");\n }\n _align = setting;\n this.hasBeenReset = true;\n }\n }\n });\n\n /**\n * Other <track> spec defined properties\n */\n\n // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n this.displayState = undefined;\n }\n\n /**\n * VTTCue methods\n */\n\n VTTCue.prototype.getCueAsHTML = function () {\n // Assume WebVTT.convertCueToDOMTree is on the global.\n return WebVTT.convertCueToDOMTree(window, this.text);\n };\n var vttcue = VTTCue;\n\n /**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n var scrollSetting = {\n \"\": true,\n \"up\": true\n };\n function findScrollSetting(value) {\n if (typeof value !== \"string\") {\n return false;\n }\n var scroll = scrollSetting[value.toLowerCase()];\n return scroll ? value.toLowerCase() : false;\n }\n function isValidPercentValue(value) {\n return typeof value === \"number\" && value >= 0 && value <= 100;\n }\n\n // VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\n function VTTRegion() {\n var _width = 100;\n var _lines = 3;\n var _regionAnchorX = 0;\n var _regionAnchorY = 100;\n var _viewportAnchorX = 0;\n var _viewportAnchorY = 100;\n var _scroll = \"\";\n Object.defineProperties(this, {\n \"width\": {\n enumerable: true,\n get: function () {\n return _width;\n },\n set: function (value) {\n if (!isValidPercentValue(value)) {\n throw new Error(\"Width must be between 0 and 100.\");\n }\n _width = value;\n }\n },\n \"lines\": {\n enumerable: true,\n get: function () {\n return _lines;\n },\n set: function (value) {\n if (typeof value !== \"number\") {\n throw new TypeError(\"Lines must be set to a number.\");\n }\n _lines = value;\n }\n },\n \"regionAnchorY\": {\n enumerable: true,\n get: function () {\n return _regionAnchorY;\n },\n set: function (value) {\n if (!isValidPercentValue(value)) {\n throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n }\n _regionAnchorY = value;\n }\n },\n \"regionAnchorX\": {\n enumerable: true,\n get: function () {\n return _regionAnchorX;\n },\n set: function (value) {\n if (!isValidPercentValue(value)) {\n throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n }\n _regionAnchorX = value;\n }\n },\n \"viewportAnchorY\": {\n enumerable: true,\n get: function () {\n return _viewportAnchorY;\n },\n set: function (value) {\n if (!isValidPercentValue(value)) {\n throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n }\n _viewportAnchorY = value;\n }\n },\n \"viewportAnchorX\": {\n enumerable: true,\n get: function () {\n return _viewportAnchorX;\n },\n set: function (value) {\n if (!isValidPercentValue(value)) {\n throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n }\n _viewportAnchorX = value;\n }\n },\n \"scroll\": {\n enumerable: true,\n get: function () {\n return _scroll;\n },\n set: function (value) {\n var setting = findScrollSetting(value);\n // Have to check for false as an empty string is a legal value.\n if (setting === false) {\n console.warn(\"Scroll: an invalid or illegal string was specified.\");\n } else {\n _scroll = setting;\n }\n }\n }\n });\n }\n var vttregion = VTTRegion;\n\n var browserIndex = createCommonjsModule(function (module) {\n /**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n // Default exports for Node. Export the extended versions of VTTCue and\n // VTTRegion in Node since we likely want the capability to convert back and\n // forth between JSON. If we don't then it's not that big of a deal since we're\n // off browser.\n\n var vttjs = module.exports = {\n WebVTT: vtt,\n VTTCue: vttcue,\n VTTRegion: vttregion\n };\n window_1.vttjs = vttjs;\n window_1.WebVTT = vttjs.WebVTT;\n var cueShim = vttjs.VTTCue;\n var regionShim = vttjs.VTTRegion;\n var nativeVTTCue = window_1.VTTCue;\n var nativeVTTRegion = window_1.VTTRegion;\n vttjs.shim = function () {\n window_1.VTTCue = cueShim;\n window_1.VTTRegion = regionShim;\n };\n vttjs.restore = function () {\n window_1.VTTCue = nativeVTTCue;\n window_1.VTTRegion = nativeVTTRegion;\n };\n if (!window_1.VTTCue) {\n vttjs.shim();\n }\n });\n browserIndex.WebVTT;\n browserIndex.VTTCue;\n browserIndex.VTTRegion;\n\n /**\n * @file tech.js\n */\n\n /**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n * The url to the source\n *\n * @property {string} type\n * The mime type of the source\n */\n\n /**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n * An instance of the Tech class.\n *\n * @param {string} kind\n * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n * Label to identify the text track\n *\n * @param {string} [language]\n * Two letter language abbreviation\n *\n * @param {Object} [options={}]\n * An object with additional text track options\n *\n * @return {TextTrack}\n * The text track that was created.\n */\n function createTrackHelper(self, kind, label, language, options = {}) {\n const tracks = self.textTracks();\n options.kind = kind;\n if (label) {\n options.label = label;\n }\n if (language) {\n options.language = language;\n }\n options.tech = self;\n const track = new ALL.text.TrackClass(options);\n tracks.addTrack(track);\n return track;\n }\n\n /**\n * This is the base class for media playback technology controllers, such as\n * {@link HTML5}\n *\n * @extends Component\n */\n class Tech extends Component$1 {\n /**\n * Create an instance of this Tech.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * Callback function to call when the `HTML5` Tech is ready.\n */\n constructor(options = {}, ready = function () {}) {\n // we don't want the tech to report user activity automatically.\n // This is done manually in addControlsListeners\n options.reportTouchActivity = false;\n super(null, options, ready);\n this.onDurationChange_ = e => this.onDurationChange(e);\n this.trackProgress_ = e => this.trackProgress(e);\n this.trackCurrentTime_ = e => this.trackCurrentTime(e);\n this.stopTrackingCurrentTime_ = e => this.stopTrackingCurrentTime(e);\n this.disposeSourceHandler_ = e => this.disposeSourceHandler(e);\n this.queuedHanders_ = new Set();\n\n // keep track of whether the current source has played at all to\n // implement a very limited played()\n this.hasStarted_ = false;\n this.on('playing', function () {\n this.hasStarted_ = true;\n });\n this.on('loadstart', function () {\n this.hasStarted_ = false;\n });\n ALL.names.forEach(name => {\n const props = ALL[name];\n if (options && options[props.getterName]) {\n this[props.privateName] = options[props.getterName];\n }\n });\n\n // Manually track progress in cases where the browser/tech doesn't report it.\n if (!this.featuresProgressEvents) {\n this.manualProgressOn();\n }\n\n // Manually track timeupdates in cases where the browser/tech doesn't report it.\n if (!this.featuresTimeupdateEvents) {\n this.manualTimeUpdatesOn();\n }\n ['Text', 'Audio', 'Video'].forEach(track => {\n if (options[`native${track}Tracks`] === false) {\n this[`featuresNative${track}Tracks`] = false;\n }\n });\n if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n this.featuresNativeTextTracks = false;\n } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n this.featuresNativeTextTracks = true;\n }\n if (!this.featuresNativeTextTracks) {\n this.emulateTextTracks();\n }\n this.preloadTextTracks = options.preloadTextTracks !== false;\n this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n this.initTrackListeners();\n\n // Turn on component tap events only if not using native controls\n if (!options.nativeControlsForTouch) {\n this.emitTapEvents();\n }\n if (this.constructor) {\n this.name_ = this.constructor.name || 'Unknown Tech';\n }\n }\n\n /**\n * A special function to trigger source set in a way that will allow player\n * to re-trigger if the player or tech are not ready yet.\n *\n * @fires Tech#sourceset\n * @param {string} src The source string at the time of the source changing.\n */\n triggerSourceset(src) {\n if (!this.isReady_) {\n // on initial ready we have to trigger source set\n // 1ms after ready so that player can watch for it.\n this.one('ready', () => this.setTimeout(() => this.triggerSourceset(src), 1));\n }\n\n /**\n * Fired when the source is set on the tech causing the media element\n * to reload.\n *\n * @see {@link Player#event:sourceset}\n * @event Tech#sourceset\n * @type {Event}\n */\n this.trigger({\n src,\n type: 'sourceset'\n });\n }\n\n /* Fallbacks for unsupported event types\n ================================================================================ */\n\n /**\n * Polyfill the `progress` event for browsers that don't support it natively.\n *\n * @see {@link Tech#trackProgress}\n */\n manualProgressOn() {\n this.on('durationchange', this.onDurationChange_);\n this.manualProgress = true;\n\n // Trigger progress watching when a source begins loading\n this.one('ready', this.trackProgress_);\n }\n\n /**\n * Turn off the polyfill for `progress` events that was created in\n * {@link Tech#manualProgressOn}\n */\n manualProgressOff() {\n this.manualProgress = false;\n this.stopTrackingProgress();\n this.off('durationchange', this.onDurationChange_);\n }\n\n /**\n * This is used to trigger a `progress` event when the buffered percent changes. It\n * sets an interval function that will be called every 500 milliseconds to check if the\n * buffer end percent has changed.\n *\n * > This function is called by {@link Tech#manualProgressOn}\n *\n * @param {Event} event\n * The `ready` event that caused this to run.\n *\n * @listens Tech#ready\n * @fires Tech#progress\n */\n trackProgress(event) {\n this.stopTrackingProgress();\n this.progressInterval = this.setInterval(bind_(this, function () {\n // Don't trigger unless buffered amount is greater than last time\n\n const numBufferedPercent = this.bufferedPercent();\n if (this.bufferedPercent_ !== numBufferedPercent) {\n /**\n * See {@link Player#progress}\n *\n * @event Tech#progress\n * @type {Event}\n */\n this.trigger('progress');\n }\n this.bufferedPercent_ = numBufferedPercent;\n if (numBufferedPercent === 1) {\n this.stopTrackingProgress();\n }\n }), 500);\n }\n\n /**\n * Update our internal duration on a `durationchange` event by calling\n * {@link Tech#duration}.\n *\n * @param {Event} event\n * The `durationchange` event that caused this to run.\n *\n * @listens Tech#durationchange\n */\n onDurationChange(event) {\n this.duration_ = this.duration();\n }\n\n /**\n * Get and create a `TimeRange` object for buffering.\n *\n * @return { import('../utils/time').TimeRange }\n * The time range object that was created.\n */\n buffered() {\n return createTimeRanges$1(0, 0);\n }\n\n /**\n * Get the percentage of the current video that is currently buffered.\n *\n * @return {number}\n * A number from 0 to 1 that represents the decimal percentage of the\n * video that is buffered.\n *\n */\n bufferedPercent() {\n return bufferedPercent(this.buffered(), this.duration_);\n }\n\n /**\n * Turn off the polyfill for `progress` events that was created in\n * {@link Tech#manualProgressOn}\n * Stop manually tracking progress events by clearing the interval that was set in\n * {@link Tech#trackProgress}.\n */\n stopTrackingProgress() {\n this.clearInterval(this.progressInterval);\n }\n\n /**\n * Polyfill the `timeupdate` event for browsers that don't support it.\n *\n * @see {@link Tech#trackCurrentTime}\n */\n manualTimeUpdatesOn() {\n this.manualTimeUpdates = true;\n this.on('play', this.trackCurrentTime_);\n this.on('pause', this.stopTrackingCurrentTime_);\n }\n\n /**\n * Turn off the polyfill for `timeupdate` events that was created in\n * {@link Tech#manualTimeUpdatesOn}\n */\n manualTimeUpdatesOff() {\n this.manualTimeUpdates = false;\n this.stopTrackingCurrentTime();\n this.off('play', this.trackCurrentTime_);\n this.off('pause', this.stopTrackingCurrentTime_);\n }\n\n /**\n * Sets up an interval function to track current time and trigger `timeupdate` every\n * 250 milliseconds.\n *\n * @listens Tech#play\n * @triggers Tech#timeupdate\n */\n trackCurrentTime() {\n if (this.currentTimeInterval) {\n this.stopTrackingCurrentTime();\n }\n this.currentTimeInterval = this.setInterval(function () {\n /**\n * Triggered at an interval of 250ms to indicated that time is passing in the video.\n *\n * @event Tech#timeupdate\n * @type {Event}\n */\n this.trigger({\n type: 'timeupdate',\n target: this,\n manuallyTriggered: true\n });\n\n // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n }, 250);\n }\n\n /**\n * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n * `timeupdate` event is no longer triggered.\n *\n * @listens {Tech#pause}\n */\n stopTrackingCurrentTime() {\n this.clearInterval(this.currentTimeInterval);\n\n // #1002 - if the video ends right before the next timeupdate would happen,\n // the progress bar won't make it all the way to the end\n this.trigger({\n type: 'timeupdate',\n target: this,\n manuallyTriggered: true\n });\n }\n\n /**\n * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n *\n * @fires Component#dispose\n */\n dispose() {\n // clear out all tracks because we can't reuse them between techs\n this.clearTracks(NORMAL.names);\n\n // Turn off any manual progress or timeupdate tracking\n if (this.manualProgress) {\n this.manualProgressOff();\n }\n if (this.manualTimeUpdates) {\n this.manualTimeUpdatesOff();\n }\n super.dispose();\n }\n\n /**\n * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n *\n * > Note: Techs without source handlers should call this between sources for `video`\n * & `audio` tracks. You don't want to use them between tracks!\n *\n * @param {string[]|string} types\n * TrackList names to clear, valid names are `video`, `audio`, and\n * `text`.\n */\n clearTracks(types) {\n types = [].concat(types);\n // clear out all tracks because we can't reuse them between techs\n types.forEach(type => {\n const list = this[`${type}Tracks`]() || [];\n let i = list.length;\n while (i--) {\n const track = list[i];\n if (type === 'text') {\n this.removeRemoteTextTrack(track);\n }\n list.removeTrack(track);\n }\n });\n }\n\n /**\n * Remove any TextTracks added via addRemoteTextTrack that are\n * flagged for automatic garbage collection\n */\n cleanupAutoTextTracks() {\n const list = this.autoRemoteTextTracks_ || [];\n let i = list.length;\n while (i--) {\n const track = list[i];\n this.removeRemoteTextTrack(track);\n }\n }\n\n /**\n * Reset the tech, which will removes all sources and reset the internal readyState.\n *\n * @abstract\n */\n reset() {}\n\n /**\n * Get the value of `crossOrigin` from the tech.\n *\n * @abstract\n *\n * @see {Html5#crossOrigin}\n */\n crossOrigin() {}\n\n /**\n * Set the value of `crossOrigin` on the tech.\n *\n * @abstract\n *\n * @param {string} crossOrigin the crossOrigin value\n * @see {Html5#setCrossOrigin}\n */\n setCrossOrigin() {}\n\n /**\n * Get or set an error on the Tech.\n *\n * @param {MediaError} [err]\n * Error to set on the Tech\n *\n * @return {MediaError|null}\n * The current error object on the tech, or null if there isn't one.\n */\n error(err) {\n if (err !== undefined) {\n this.error_ = new MediaError(err);\n this.trigger('error');\n }\n return this.error_;\n }\n\n /**\n * Returns the `TimeRange`s that have been played through for the current source.\n *\n * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n * It only checks whether the source has played at all or not.\n *\n * @return {TimeRange}\n * - A single time range if this video has played\n * - An empty set of ranges if not.\n */\n played() {\n if (this.hasStarted_) {\n return createTimeRanges$1(0, 0);\n }\n return createTimeRanges$1();\n }\n\n /**\n * Start playback\n *\n * @abstract\n *\n * @see {Html5#play}\n */\n play() {}\n\n /**\n * Set whether we are scrubbing or not\n *\n * @abstract\n * @param {boolean} _isScrubbing\n * - true for we are currently scrubbing\n * - false for we are no longer scrubbing\n *\n * @see {Html5#setScrubbing}\n */\n setScrubbing(_isScrubbing) {}\n\n /**\n * Get whether we are scrubbing or not\n *\n * @abstract\n *\n * @see {Html5#scrubbing}\n */\n scrubbing() {}\n\n /**\n * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n * previously called.\n *\n * @param {number} _seconds\n * Set the current time of the media to this.\n * @fires Tech#timeupdate\n */\n setCurrentTime(_seconds) {\n // improve the accuracy of manual timeupdates\n if (this.manualTimeUpdates) {\n /**\n * A manual `timeupdate` event.\n *\n * @event Tech#timeupdate\n * @type {Event}\n */\n this.trigger({\n type: 'timeupdate',\n target: this,\n manuallyTriggered: true\n });\n }\n }\n\n /**\n * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n * {@link TextTrackList} events.\n *\n * This adds {@link EventTarget~EventListeners} for `addtrack`, and `removetrack`.\n *\n * @fires Tech#audiotrackchange\n * @fires Tech#videotrackchange\n * @fires Tech#texttrackchange\n */\n initTrackListeners() {\n /**\n * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n *\n * @event Tech#audiotrackchange\n * @type {Event}\n */\n\n /**\n * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n *\n * @event Tech#videotrackchange\n * @type {Event}\n */\n\n /**\n * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n *\n * @event Tech#texttrackchange\n * @type {Event}\n */\n NORMAL.names.forEach(name => {\n const props = NORMAL[name];\n const trackListChanges = () => {\n this.trigger(`${name}trackchange`);\n };\n const tracks = this[props.getterName]();\n tracks.addEventListener('removetrack', trackListChanges);\n tracks.addEventListener('addtrack', trackListChanges);\n this.on('dispose', () => {\n tracks.removeEventListener('removetrack', trackListChanges);\n tracks.removeEventListener('addtrack', trackListChanges);\n });\n });\n }\n\n /**\n * Emulate TextTracks using vtt.js if necessary\n *\n * @fires Tech#vttjsloaded\n * @fires Tech#vttjserror\n */\n addWebVttScript_() {\n if (window.WebVTT) {\n return;\n }\n\n // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n // before inserting the WebVTT script\n if (document.body.contains(this.el())) {\n // load via require if available and vtt.js script location was not passed in\n // as an option. novtt builds will turn the above require call into an empty object\n // which will cause this if check to always fail.\n if (!this.options_['vtt.js'] && isPlain(browserIndex) && Object.keys(browserIndex).length > 0) {\n this.trigger('vttjsloaded');\n return;\n }\n\n // load vtt.js via the script location option or the cdn of no location was\n // passed in\n const script = document.createElement('script');\n script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';\n script.onload = () => {\n /**\n * Fired when vtt.js is loaded.\n *\n * @event Tech#vttjsloaded\n * @type {Event}\n */\n this.trigger('vttjsloaded');\n };\n script.onerror = () => {\n /**\n * Fired when vtt.js was not loaded due to an error\n *\n * @event Tech#vttjsloaded\n * @type {Event}\n */\n this.trigger('vttjserror');\n };\n this.on('dispose', () => {\n script.onload = null;\n script.onerror = null;\n });\n // but have not loaded yet and we set it to true before the inject so that\n // we don't overwrite the injected window.WebVTT if it loads right away\n window.WebVTT = true;\n this.el().parentNode.appendChild(script);\n } else {\n this.ready(this.addWebVttScript_);\n }\n }\n\n /**\n * Emulate texttracks\n *\n */\n emulateTextTracks() {\n const tracks = this.textTracks();\n const remoteTracks = this.remoteTextTracks();\n const handleAddTrack = e => tracks.addTrack(e.track);\n const handleRemoveTrack = e => tracks.removeTrack(e.track);\n remoteTracks.on('addtrack', handleAddTrack);\n remoteTracks.on('removetrack', handleRemoveTrack);\n this.addWebVttScript_();\n const updateDisplay = () => this.trigger('texttrackchange');\n const textTracksChanges = () => {\n updateDisplay();\n for (let i = 0; i < tracks.length; i++) {\n const track = tracks[i];\n track.removeEventListener('cuechange', updateDisplay);\n if (track.mode === 'showing') {\n track.addEventListener('cuechange', updateDisplay);\n }\n }\n };\n textTracksChanges();\n tracks.addEventListener('change', textTracksChanges);\n tracks.addEventListener('addtrack', textTracksChanges);\n tracks.addEventListener('removetrack', textTracksChanges);\n this.on('dispose', function () {\n remoteTracks.off('addtrack', handleAddTrack);\n remoteTracks.off('removetrack', handleRemoveTrack);\n tracks.removeEventListener('change', textTracksChanges);\n tracks.removeEventListener('addtrack', textTracksChanges);\n tracks.removeEventListener('removetrack', textTracksChanges);\n for (let i = 0; i < tracks.length; i++) {\n const track = tracks[i];\n track.removeEventListener('cuechange', updateDisplay);\n }\n });\n }\n\n /**\n * Create and returns a remote {@link TextTrack} object.\n *\n * @param {string} kind\n * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n * Label to identify the text track\n *\n * @param {string} [language]\n * Two letter language abbreviation\n *\n * @return {TextTrack}\n * The TextTrack that gets created.\n */\n addTextTrack(kind, label, language) {\n if (!kind) {\n throw new Error('TextTrack kind is required but was not provided');\n }\n return createTrackHelper(this, kind, label, language);\n }\n\n /**\n * Create an emulated TextTrack for use by addRemoteTextTrack\n *\n * This is intended to be overridden by classes that inherit from\n * Tech in order to create native or custom TextTracks.\n *\n * @param {Object} options\n * The object should contain the options to initialize the TextTrack with.\n *\n * @param {string} [options.kind]\n * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n *\n * @param {string} [options.label].\n * Label to identify the text track\n *\n * @param {string} [options.language]\n * Two letter language abbreviation.\n *\n * @return {HTMLTrackElement}\n * The track element that gets created.\n */\n createRemoteTextTrack(options) {\n const track = merge$2(options, {\n tech: this\n });\n return new REMOTE.remoteTextEl.TrackClass(track);\n }\n\n /**\n * Creates a remote text track object and returns an html track element.\n *\n * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n *\n * @param {Object} options\n * See {@link Tech#createRemoteTextTrack} for more detailed properties.\n *\n * @param {boolean} [manualCleanup=false]\n * - When false: the TextTrack will be automatically removed from the video\n * element whenever the source changes\n * - When True: The TextTrack will have to be cleaned up manually\n *\n * @return {HTMLTrackElement}\n * An Html Track Element.\n *\n */\n addRemoteTextTrack(options = {}, manualCleanup) {\n const htmlTrackElement = this.createRemoteTextTrack(options);\n if (typeof manualCleanup !== 'boolean') {\n manualCleanup = false;\n }\n\n // store HTMLTrackElement and TextTrack to remote list\n this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n this.remoteTextTracks().addTrack(htmlTrackElement.track);\n if (manualCleanup === false) {\n // create the TextTrackList if it doesn't exist\n this.ready(() => this.autoRemoteTextTracks_.addTrack(htmlTrackElement.track));\n }\n return htmlTrackElement;\n }\n\n /**\n * Remove a remote text track from the remote `TextTrackList`.\n *\n * @param {TextTrack} track\n * `TextTrack` to remove from the `TextTrackList`\n */\n removeRemoteTextTrack(track) {\n const trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track);\n\n // remove HTMLTrackElement and TextTrack from remote list\n this.remoteTextTrackEls().removeTrackElement_(trackElement);\n this.remoteTextTracks().removeTrack(track);\n this.autoRemoteTextTracks_.removeTrack(track);\n }\n\n /**\n * Gets available media playback quality metrics as specified by the W3C's Media\n * Playback Quality API.\n *\n * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n *\n * @return {Object}\n * An object with supported media playback quality metrics\n *\n * @abstract\n */\n getVideoPlaybackQuality() {\n return {};\n }\n\n /**\n * Attempt to create a floating video window always on top of other windows\n * so that users may continue consuming media while they interact with other\n * content sites, or applications on their device.\n *\n * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n *\n * @return {Promise|undefined}\n * A promise with a Picture-in-Picture window if the browser supports\n * Promises (or one was passed in as an option). It returns undefined\n * otherwise.\n *\n * @abstract\n */\n requestPictureInPicture() {\n return Promise.reject();\n }\n\n /**\n * A method to check for the value of the 'disablePictureInPicture' <video> property.\n * Defaults to true, as it should be considered disabled if the tech does not support pip\n *\n * @abstract\n */\n disablePictureInPicture() {\n return true;\n }\n\n /**\n * A method to set or unset the 'disablePictureInPicture' <video> property.\n *\n * @abstract\n */\n setDisablePictureInPicture() {}\n\n /**\n * A fallback implementation of requestVideoFrameCallback using requestAnimationFrame\n *\n * @param {function} cb\n * @return {number} request id\n */\n requestVideoFrameCallback(cb) {\n const id = newGUID();\n if (!this.isReady_ || this.paused()) {\n this.queuedHanders_.add(id);\n this.one('playing', () => {\n if (this.queuedHanders_.has(id)) {\n this.queuedHanders_.delete(id);\n cb();\n }\n });\n } else {\n this.requestNamedAnimationFrame(id, cb);\n }\n return id;\n }\n\n /**\n * A fallback implementation of cancelVideoFrameCallback\n *\n * @param {number} id id of callback to be cancelled\n */\n cancelVideoFrameCallback(id) {\n if (this.queuedHanders_.has(id)) {\n this.queuedHanders_.delete(id);\n } else {\n this.cancelNamedAnimationFrame(id);\n }\n }\n\n /**\n * A method to set a poster from a `Tech`.\n *\n * @abstract\n */\n setPoster() {}\n\n /**\n * A method to check for the presence of the 'playsinline' <video> attribute.\n *\n * @abstract\n */\n playsinline() {}\n\n /**\n * A method to set or unset the 'playsinline' <video> attribute.\n *\n * @abstract\n */\n setPlaysinline() {}\n\n /**\n * Attempt to force override of native audio tracks.\n *\n * @param {boolean} override - If set to true native audio will be overridden,\n * otherwise native audio will potentially be used.\n *\n * @abstract\n */\n overrideNativeAudioTracks(override) {}\n\n /**\n * Attempt to force override of native video tracks.\n *\n * @param {boolean} override - If set to true native video will be overridden,\n * otherwise native video will potentially be used.\n *\n * @abstract\n */\n overrideNativeVideoTracks(override) {}\n\n /**\n * Check if the tech can support the given mime-type.\n *\n * The base tech does not support any type, but source handlers might\n * overwrite this.\n *\n * @param {string} _type\n * The mimetype to check for support\n *\n * @return {string}\n * 'probably', 'maybe', or empty string\n *\n * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n *\n * @abstract\n */\n canPlayType(_type) {\n return '';\n }\n\n /**\n * Check if the type is supported by this tech.\n *\n * The base tech does not support any type, but source handlers might\n * overwrite this.\n *\n * @param {string} _type\n * The media type to check\n * @return {string} Returns the native video element's response\n */\n static canPlayType(_type) {\n return '';\n }\n\n /**\n * Check if the tech can support the given source\n *\n * @param {Object} srcObj\n * The source object\n * @param {Object} options\n * The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n static canPlaySource(srcObj, options) {\n return Tech.canPlayType(srcObj.type);\n }\n\n /*\n * Return whether the argument is a Tech or not.\n * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n *\n * @param {Object} component\n * The item to check\n *\n * @return {boolean}\n * Whether it is a tech or not\n * - True if it is a tech\n * - False if it is not\n */\n static isTech(component) {\n return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n }\n\n /**\n * Registers a `Tech` into a shared list for videojs.\n *\n * @param {string} name\n * Name of the `Tech` to register.\n *\n * @param {Object} tech\n * The `Tech` class to register.\n */\n static registerTech(name, tech) {\n if (!Tech.techs_) {\n Tech.techs_ = {};\n }\n if (!Tech.isTech(tech)) {\n throw new Error(`Tech ${name} must be a Tech`);\n }\n if (!Tech.canPlayType) {\n throw new Error('Techs must have a static canPlayType method on them');\n }\n if (!Tech.canPlaySource) {\n throw new Error('Techs must have a static canPlaySource method on them');\n }\n name = toTitleCase$1(name);\n Tech.techs_[name] = tech;\n Tech.techs_[toLowerCase(name)] = tech;\n if (name !== 'Tech') {\n // camel case the techName for use in techOrder\n Tech.defaultTechOrder_.push(name);\n }\n return tech;\n }\n\n /**\n * Get a `Tech` from the shared list by name.\n *\n * @param {string} name\n * `camelCase` or `TitleCase` name of the Tech to get\n *\n * @return {Tech|undefined}\n * The `Tech` or undefined if there was no tech with the name requested.\n */\n static getTech(name) {\n if (!name) {\n return;\n }\n if (Tech.techs_ && Tech.techs_[name]) {\n return Tech.techs_[name];\n }\n name = toTitleCase$1(name);\n if (window && window.videojs && window.videojs[name]) {\n log$1.warn(`The ${name} tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)`);\n return window.videojs[name];\n }\n }\n }\n\n /**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n /**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n /**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n /**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n /**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\n ALL.names.forEach(function (name) {\n const props = ALL[name];\n Tech.prototype[props.getterName] = function () {\n this[props.privateName] = this[props.privateName] || new props.ListClass();\n return this[props.privateName];\n };\n });\n\n /**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n /**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n /**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n /**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresVolumeControl = true;\n\n /**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresMuteControl = true;\n\n /**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresFullscreenResize = false;\n\n /**\n * Boolean indicating whether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n * - Set player to play 2x (twice) as fast\n * - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresPlaybackRate = false;\n\n /**\n * Boolean indicating whether the `Tech` supports the `progress` event.\n * This will be used to determine if {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresProgressEvents = false;\n\n /**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresSourceset = false;\n\n /**\n * Boolean indicating whether the `Tech` supports the `timeupdate` event.\n * This will be used to determine if {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresTimeupdateEvents = false;\n\n /**\n * Boolean indicating whether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresNativeTextTracks = false;\n\n /**\n * Boolean indicating whether the `Tech` supports `requestVideoFrameCallback`.\n *\n * @type {boolean}\n * @default\n */\n Tech.prototype.featuresVideoFrameCallback = false;\n\n /**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n * The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\n Tech.withSourceHandlers = function (_Tech) {\n /**\n * Register a source handler\n *\n * @param {Function} handler\n * The source handler class\n *\n * @param {number} [index]\n * Register it at the following index\n */\n _Tech.registerSourceHandler = function (handler, index) {\n let handlers = _Tech.sourceHandlers;\n if (!handlers) {\n handlers = _Tech.sourceHandlers = [];\n }\n if (index === undefined) {\n // add to the end of the list\n index = handlers.length;\n }\n handlers.splice(index, 0, handler);\n };\n\n /**\n * Check if the tech can support the given type. Also checks the\n * Techs sourceHandlers.\n *\n * @param {string} type\n * The mimetype to check.\n *\n * @return {string}\n * 'probably', 'maybe', or '' (empty string)\n */\n _Tech.canPlayType = function (type) {\n const handlers = _Tech.sourceHandlers || [];\n let can;\n for (let i = 0; i < handlers.length; i++) {\n can = handlers[i].canPlayType(type);\n if (can) {\n return can;\n }\n }\n return '';\n };\n\n /**\n * Returns the first source handler that supports the source.\n *\n * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n *\n * @param {Tech~SourceObject} source\n * The source object\n *\n * @param {Object} options\n * The options passed to the tech\n *\n * @return {SourceHandler|null}\n * The first source handler that supports the source or null if\n * no SourceHandler supports the source\n */\n _Tech.selectSourceHandler = function (source, options) {\n const handlers = _Tech.sourceHandlers || [];\n let can;\n for (let i = 0; i < handlers.length; i++) {\n can = handlers[i].canHandleSource(source, options);\n if (can) {\n return handlers[i];\n }\n }\n return null;\n };\n\n /**\n * Check if the tech can support the given source.\n *\n * @param {Tech~SourceObject} srcObj\n * The source object\n *\n * @param {Object} options\n * The options passed to the tech\n *\n * @return {string}\n * 'probably', 'maybe', or '' (empty string)\n */\n _Tech.canPlaySource = function (srcObj, options) {\n const sh = _Tech.selectSourceHandler(srcObj, options);\n if (sh) {\n return sh.canHandleSource(srcObj, options);\n }\n return '';\n };\n\n /**\n * When using a source handler, prefer its implementation of\n * any function normally provided by the tech.\n */\n const deferrable = ['seekable', 'seeking', 'duration'];\n\n /**\n * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n * function if it exists, with a fallback to the Techs seekable function.\n *\n * @method _Tech.seekable\n */\n\n /**\n * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n * function if it exists, otherwise it will fallback to the techs duration function.\n *\n * @method _Tech.duration\n */\n\n deferrable.forEach(function (fnName) {\n const originalFn = this[fnName];\n if (typeof originalFn !== 'function') {\n return;\n }\n this[fnName] = function () {\n if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n }\n return originalFn.apply(this, arguments);\n };\n }, _Tech.prototype);\n\n /**\n * Create a function for setting the source using a source object\n * and source handlers.\n * Should never be called unless a source handler was found.\n *\n * @param {Tech~SourceObject} source\n * A source object with src and type keys\n */\n _Tech.prototype.setSource = function (source) {\n let sh = _Tech.selectSourceHandler(source, this.options_);\n if (!sh) {\n // Fall back to a native source handler when unsupported sources are\n // deliberately set\n if (_Tech.nativeSourceHandler) {\n sh = _Tech.nativeSourceHandler;\n } else {\n log$1.error('No source handler found for the current source.');\n }\n }\n\n // Dispose any existing source handler\n this.disposeSourceHandler();\n this.off('dispose', this.disposeSourceHandler_);\n if (sh !== _Tech.nativeSourceHandler) {\n this.currentSource_ = source;\n }\n this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n this.one('dispose', this.disposeSourceHandler_);\n };\n\n /**\n * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n *\n * @listens Tech#dispose\n */\n _Tech.prototype.disposeSourceHandler = function () {\n // if we have a source and get another one\n // then we are loading something new\n // than clear all of our current tracks\n if (this.currentSource_) {\n this.clearTracks(['audio', 'video']);\n this.currentSource_ = null;\n }\n\n // always clean up auto-text tracks\n this.cleanupAutoTextTracks();\n if (this.sourceHandler_) {\n if (this.sourceHandler_.dispose) {\n this.sourceHandler_.dispose();\n }\n this.sourceHandler_ = null;\n }\n };\n };\n\n // The base Tech class needs to be registered as a Component. It is the only\n // Tech that can be registered as a Component.\n Component$1.registerComponent('Tech', Tech);\n Tech.registerTech('Tech', Tech);\n\n /**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\n Tech.defaultTechOrder_ = [];\n\n /**\n * @file middleware.js\n * @module middleware\n */\n const middlewares = {};\n const middlewareInstances = {};\n const TERMINATOR = {};\n\n /**\n * A middleware object is a plain JavaScript object that has methods that\n * match the {@link Tech} methods found in the lists of allowed\n * {@link module:middleware.allowedGetters|getters},\n * {@link module:middleware.allowedSetters|setters}, and\n * {@link module:middleware.allowedMediators|mediators}.\n *\n * @typedef {Object} MiddlewareObject\n */\n\n /**\n * A middleware factory function that should return a\n * {@link module:middleware~MiddlewareObject|MiddlewareObject}.\n *\n * This factory will be called for each player when needed, with the player\n * passed in as an argument.\n *\n * @callback MiddlewareFactory\n * @param { import('../player').default } player\n * A Video.js player.\n */\n\n /**\n * Define a middleware that the player should use by way of a factory function\n * that returns a middleware object.\n *\n * @param {string} type\n * The MIME type to match or `\"*\"` for all MIME types.\n *\n * @param {MiddlewareFactory} middleware\n * A middleware factory function that will be executed for\n * matching types.\n */\n function use(type, middleware) {\n middlewares[type] = middlewares[type] || [];\n middlewares[type].push(middleware);\n }\n\n /**\n * Asynchronously sets a source using middleware by recursing through any\n * matching middlewares and calling `setSource` on each, passing along the\n * previous returned value each time.\n *\n * @param { import('../player').default } player\n * A {@link Player} instance.\n *\n * @param {Tech~SourceObject} src\n * A source object.\n *\n * @param {Function}\n * The next middleware to run.\n */\n function setSource(player, src, next) {\n player.setTimeout(() => setSourceHelper(src, middlewares[src.type], next, player), 1);\n }\n\n /**\n * When the tech is set, passes the tech to each middleware's `setTech` method.\n *\n * @param {Object[]} middleware\n * An array of middleware instances.\n *\n * @param { import('../tech/tech').default } tech\n * A Video.js tech.\n */\n function setTech(middleware, tech) {\n middleware.forEach(mw => mw.setTech && mw.setTech(tech));\n }\n\n /**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n *\n * @param {Object[]} middleware\n * An array of middleware instances.\n *\n * @param { import('../tech/tech').default } tech\n * The current tech.\n *\n * @param {string} method\n * A method name.\n *\n * @return {*}\n * The final value from the tech after middleware has intercepted it.\n */\n function get(middleware, tech, method) {\n return middleware.reduceRight(middlewareIterator(method), tech[method]());\n }\n\n /**\n * Takes the argument given to the player and calls the setter method on each\n * middleware from left to right to the tech.\n *\n * @param {Object[]} middleware\n * An array of middleware instances.\n *\n * @param { import('../tech/tech').default } tech\n * The current tech.\n *\n * @param {string} method\n * A method name.\n *\n * @param {*} arg\n * The value to set on the tech.\n *\n * @return {*}\n * The return value of the `method` of the `tech`.\n */\n function set(middleware, tech, method, arg) {\n return tech[method](middleware.reduce(middlewareIterator(method), arg));\n }\n\n /**\n * Takes the argument given to the player and calls the `call` version of the\n * method on each middleware from left to right.\n *\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n *\n * @param {Object[]} middleware\n * An array of middleware instances.\n *\n * @param { import('../tech/tech').default } tech\n * The current tech.\n *\n * @param {string} method\n * A method name.\n *\n * @param {*} arg\n * The value to set on the tech.\n *\n * @return {*}\n * The return value of the `method` of the `tech`, regardless of the\n * return values of middlewares.\n */\n function mediate(middleware, tech, method, arg = null) {\n const callMethod = 'call' + toTitleCase$1(method);\n const middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n const terminated = middlewareValue === TERMINATOR;\n // deprecated. The `null` return value should instead return TERMINATOR to\n // prevent confusion if a techs method actually returns null.\n const returnValue = terminated ? null : tech[method](middlewareValue);\n executeRight(middleware, method, returnValue, terminated);\n return returnValue;\n }\n\n /**\n * Enumeration of allowed getters where the keys are method names.\n *\n * @type {Object}\n */\n const allowedGetters = {\n buffered: 1,\n currentTime: 1,\n duration: 1,\n muted: 1,\n played: 1,\n paused: 1,\n seekable: 1,\n volume: 1,\n ended: 1\n };\n\n /**\n * Enumeration of allowed setters where the keys are method names.\n *\n * @type {Object}\n */\n const allowedSetters = {\n setCurrentTime: 1,\n setMuted: 1,\n setVolume: 1\n };\n\n /**\n * Enumeration of allowed mediators where the keys are method names.\n *\n * @type {Object}\n */\n const allowedMediators = {\n play: 1,\n pause: 1\n };\n function middlewareIterator(method) {\n return (value, mw) => {\n // if the previous middleware terminated, pass along the termination\n if (value === TERMINATOR) {\n return TERMINATOR;\n }\n if (mw[method]) {\n return mw[method](value);\n }\n return value;\n };\n }\n function executeRight(mws, method, value, terminated) {\n for (let i = mws.length - 1; i >= 0; i--) {\n const mw = mws[i];\n if (mw[method]) {\n mw[method](terminated, value);\n }\n }\n }\n\n /**\n * Clear the middleware cache for a player.\n *\n * @param { import('../player').default } player\n * A {@link Player} instance.\n */\n function clearCacheForPlayer(player) {\n middlewareInstances[player.id()] = null;\n }\n\n /**\n * {\n * [playerId]: [[mwFactory, mwInstance], ...]\n * }\n *\n * @private\n */\n function getOrCreateFactory(player, mwFactory) {\n const mws = middlewareInstances[player.id()];\n let mw = null;\n if (mws === undefined || mws === null) {\n mw = mwFactory(player);\n middlewareInstances[player.id()] = [[mwFactory, mw]];\n return mw;\n }\n for (let i = 0; i < mws.length; i++) {\n const [mwf, mwi] = mws[i];\n if (mwf !== mwFactory) {\n continue;\n }\n mw = mwi;\n }\n if (mw === null) {\n mw = mwFactory(player);\n mws.push([mwFactory, mw]);\n }\n return mw;\n }\n function setSourceHelper(src = {}, middleware = [], next, player, acc = [], lastRun = false) {\n const [mwFactory, ...mwrest] = middleware;\n\n // if mwFactory is a string, then we're at a fork in the road\n if (typeof mwFactory === 'string') {\n setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun);\n\n // if we have an mwFactory, call it with the player to get the mw,\n // then call the mw's setSource method\n } else if (mwFactory) {\n const mw = getOrCreateFactory(player, mwFactory);\n\n // if setSource isn't present, implicitly select this middleware\n if (!mw.setSource) {\n acc.push(mw);\n return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n }\n mw.setSource(Object.assign({}, src), function (err, _src) {\n // something happened, try the next middleware on the current level\n // make sure to use the old src\n if (err) {\n return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n }\n\n // we've succeeded, now we need to go deeper\n acc.push(mw);\n\n // if it's the same type, continue down the current chain\n // otherwise, we want to go down the new chain\n setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n });\n } else if (mwrest.length) {\n setSourceHelper(src, mwrest, next, player, acc, lastRun);\n } else if (lastRun) {\n next(src, acc);\n } else {\n setSourceHelper(src, middlewares['*'], next, player, acc, true);\n }\n }\n\n /**\n * Mimetypes\n *\n * @see https://www.iana.org/assignments/media-types/media-types.xhtml\n * @typedef Mimetypes~Kind\n * @enum\n */\n const MimetypesKind = {\n opus: 'video/ogg',\n ogv: 'video/ogg',\n mp4: 'video/mp4',\n mov: 'video/mp4',\n m4v: 'video/mp4',\n mkv: 'video/x-matroska',\n m4a: 'audio/mp4',\n mp3: 'audio/mpeg',\n aac: 'audio/aac',\n caf: 'audio/x-caf',\n flac: 'audio/flac',\n oga: 'audio/ogg',\n wav: 'audio/wav',\n m3u8: 'application/x-mpegURL',\n mpd: 'application/dash+xml',\n jpg: 'image/jpeg',\n jpeg: 'image/jpeg',\n gif: 'image/gif',\n png: 'image/png',\n svg: 'image/svg+xml',\n webp: 'image/webp'\n };\n\n /**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n * The url to the src\n *\n * @return {string}\n * return the mimetype if it was known or empty string otherwise\n */\n const getMimetype = function (src = '') {\n const ext = getFileExtension(src);\n const mimetype = MimetypesKind[ext.toLowerCase()];\n return mimetype || '';\n };\n\n /**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param { import('../player').default } player\n * The player object\n *\n * @param {string} src\n * The source string\n *\n * @return {string}\n * The type that was found\n */\n const findMimetype = (player, src) => {\n if (!src) {\n return '';\n }\n\n // 1. check for the type in the `source` cache\n if (player.cache_.source.src === src && player.cache_.source.type) {\n return player.cache_.source.type;\n }\n\n // 2. see if we have this source in our `currentSources` cache\n const matchingSources = player.cache_.sources.filter(s => s.src === src);\n if (matchingSources.length) {\n return matchingSources[0].type;\n }\n\n // 3. look for the src url in source elements and use the type there\n const sources = player.$$('source');\n for (let i = 0; i < sources.length; i++) {\n const s = sources[i];\n if (s.type && s.src && s.src === src) {\n return s.type;\n }\n }\n\n // 4. finally fallback to our list of mime types based on src url extension\n return getMimetype(src);\n };\n\n /**\n * @module filter-source\n */\n\n /**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n * The src object to filter\n *\n * @return {Tech~SourceObject[]}\n * An array of sourceobjects containing only valid sources\n *\n * @private\n */\n const filterSource = function (src) {\n // traverse array\n if (Array.isArray(src)) {\n let newsrc = [];\n src.forEach(function (srcobj) {\n srcobj = filterSource(srcobj);\n if (Array.isArray(srcobj)) {\n newsrc = newsrc.concat(srcobj);\n } else if (isObject$1(srcobj)) {\n newsrc.push(srcobj);\n }\n });\n src = newsrc;\n } else if (typeof src === 'string' && src.trim()) {\n // convert string into object\n src = [fixSource({\n src\n })];\n } else if (isObject$1(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n // src is already valid\n src = [fixSource(src)];\n } else {\n // invalid source, turn it into an empty array\n src = [];\n }\n return src;\n };\n\n /**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n * The src object to check\n * @return {Tech~SourceObject}\n * src Object with known type\n */\n function fixSource(src) {\n if (!src.type) {\n const mimetype = getMimetype(src.src);\n if (mimetype) {\n src.type = mimetype;\n }\n }\n return src;\n }\n\n /**\n * @file loader.js\n */\n\n /**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n class MediaLoader extends Component$1 {\n /**\n * Create an instance of this class.\n *\n * @param { import('../player').default } player\n * The `Player` that this class should attach to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function that is run when this component is ready.\n */\n constructor(player, options, ready) {\n // MediaLoader has no element\n const options_ = merge$2({\n createEl: false\n }, options);\n super(player, options_, ready);\n\n // If there are no sources when the player is initialized,\n // load the first supported playback technology.\n\n if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n for (let i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n const techName = toTitleCase$1(j[i]);\n let tech = Tech.getTech(techName);\n\n // Support old behavior of techs being registered as components.\n // Remove once that deprecated behavior is removed.\n if (!techName) {\n tech = Component$1.getComponent(techName);\n }\n\n // Check if the browser supports this technology\n if (tech && tech.isSupported()) {\n player.loadTech_(techName);\n break;\n }\n }\n } else {\n // Loop through playback technologies (e.g. HTML5) and check for support.\n // Then load the best source.\n // A few assumptions here:\n // All playback technologies respect preload false.\n player.src(options.playerOptions.sources);\n }\n }\n }\n Component$1.registerComponent('MediaLoader', MediaLoader);\n\n /**\n * @file clickable-component.js\n */\n\n /**\n * Component which is clickable or keyboard actionable, but is not a\n * native HTML button.\n *\n * @extends Component\n */\n class ClickableComponent extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of component options.\n *\n * @param {function} [options.clickHandler]\n * The function to call when the button is clicked / activated\n *\n * @param {string} [options.controlText]\n * The text to set on the button\n *\n * @param {string} [options.className]\n * A class or space separated list of classes to add the component\n *\n */\n constructor(player, options) {\n super(player, options);\n if (this.options_.controlText) {\n this.controlText(this.options_.controlText);\n }\n this.handleMouseOver_ = e => this.handleMouseOver(e);\n this.handleMouseOut_ = e => this.handleMouseOut(e);\n this.handleClick_ = e => this.handleClick(e);\n this.handleKeyDown_ = e => this.handleKeyDown(e);\n this.emitTapEvents();\n this.enable();\n }\n\n /**\n * Create the `ClickableComponent`s DOM element.\n *\n * @param {string} [tag=div]\n * The element's node type.\n *\n * @param {Object} [props={}]\n * An object of properties that should be set on the element.\n *\n * @param {Object} [attributes={}]\n * An object of attributes that should be set on the element.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl(tag = 'div', props = {}, attributes = {}) {\n props = Object.assign({\n className: this.buildCSSClass(),\n tabIndex: 0\n }, props);\n if (tag === 'button') {\n log$1.error(`Creating a ClickableComponent with an HTML element of ${tag} is not supported; use a Button instead.`);\n }\n\n // Add ARIA attributes for clickable element which is not a native HTML button\n attributes = Object.assign({\n role: 'button'\n }, attributes);\n this.tabIndex_ = props.tabIndex;\n const el = createEl(tag, props, attributes);\n el.appendChild(createEl('span', {\n className: 'vjs-icon-placeholder'\n }, {\n 'aria-hidden': true\n }));\n this.createControlTextEl(el);\n return el;\n }\n dispose() {\n // remove controlTextEl_ on dispose\n this.controlTextEl_ = null;\n super.dispose();\n }\n\n /**\n * Create a control text element on this `ClickableComponent`\n *\n * @param {Element} [el]\n * Parent element for the control text.\n *\n * @return {Element}\n * The control text element that gets created.\n */\n createControlTextEl(el) {\n this.controlTextEl_ = createEl('span', {\n className: 'vjs-control-text'\n }, {\n // let the screen reader user know that the text of the element may change\n 'aria-live': 'polite'\n });\n if (el) {\n el.appendChild(this.controlTextEl_);\n }\n this.controlText(this.controlText_, el);\n return this.controlTextEl_;\n }\n\n /**\n * Get or set the localize text to use for the controls on the `ClickableComponent`.\n *\n * @param {string} [text]\n * Control text for element.\n *\n * @param {Element} [el=this.el()]\n * Element to set the title on.\n *\n * @return {string}\n * - The control text when getting\n */\n controlText(text, el = this.el()) {\n if (text === undefined) {\n return this.controlText_ || 'Need Text';\n }\n const localizedText = this.localize(text);\n\n /** @protected */\n this.controlText_ = text;\n textContent(this.controlTextEl_, localizedText);\n if (!this.nonIconControl && !this.player_.options_.noUITitleAttributes) {\n // Set title attribute if only an icon is shown\n el.setAttribute('title', localizedText);\n }\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-control vjs-button ${super.buildCSSClass()}`;\n }\n\n /**\n * Enable this `ClickableComponent`\n */\n enable() {\n if (!this.enabled_) {\n this.enabled_ = true;\n this.removeClass('vjs-disabled');\n this.el_.setAttribute('aria-disabled', 'false');\n if (typeof this.tabIndex_ !== 'undefined') {\n this.el_.setAttribute('tabIndex', this.tabIndex_);\n }\n this.on(['tap', 'click'], this.handleClick_);\n this.on('keydown', this.handleKeyDown_);\n }\n }\n\n /**\n * Disable this `ClickableComponent`\n */\n disable() {\n this.enabled_ = false;\n this.addClass('vjs-disabled');\n this.el_.setAttribute('aria-disabled', 'true');\n if (typeof this.tabIndex_ !== 'undefined') {\n this.el_.removeAttribute('tabIndex');\n }\n this.off('mouseover', this.handleMouseOver_);\n this.off('mouseout', this.handleMouseOut_);\n this.off(['tap', 'click'], this.handleClick_);\n this.off('keydown', this.handleKeyDown_);\n }\n\n /**\n * Handles language change in ClickableComponent for the player in components\n *\n *\n */\n handleLanguagechange() {\n this.controlText(this.controlText_);\n }\n\n /**\n * Event handler that is called when a `ClickableComponent` receives a\n * `click` or `tap` event.\n *\n * @param {Event} event\n * The `tap` or `click` event that caused this function to be called.\n *\n * @listens tap\n * @listens click\n * @abstract\n */\n handleClick(event) {\n if (this.options_.clickHandler) {\n this.options_.clickHandler.call(this, arguments);\n }\n }\n\n /**\n * Event handler that is called when a `ClickableComponent` receives a\n * `keydown` event.\n *\n * By default, if the key is Space or Enter, it will trigger a `click` event.\n *\n * @param {Event} event\n * The `keydown` event that caused this function to be called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Support Space or Enter key operation to fire a click event. Also,\n // prevent the event from propagating through the DOM and triggering\n // Player hotkeys.\n if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n event.preventDefault();\n event.stopPropagation();\n this.trigger('click');\n } else {\n // Pass keypress handling up for unsupported keys\n super.handleKeyDown(event);\n }\n }\n }\n Component$1.registerComponent('ClickableComponent', ClickableComponent);\n\n /**\n * @file poster-image.js\n */\n\n /**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n class PosterImage extends ClickableComponent {\n /**\n * Create an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should attach to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.update();\n this.update_ = e => this.update(e);\n player.on('posterchange', this.update_);\n }\n\n /**\n * Clean up and dispose of the `PosterImage`.\n */\n dispose() {\n this.player().off('posterchange', this.update_);\n super.dispose();\n }\n\n /**\n * Create the `PosterImage`s DOM element.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl() {\n // The el is an empty div to keep position in the DOM\n // A picture and img el will be inserted when a source is set\n return createEl('div', {\n className: 'vjs-poster'\n });\n }\n\n /**\n * Get or set the `PosterImage`'s crossOrigin option.\n *\n * @param {string|null} [value]\n * The value to set the crossOrigin to. If an argument is\n * given, must be one of `'anonymous'` or `'use-credentials'`, or 'null'.\n *\n * @return {string|null}\n * - The current crossOrigin value of the `Player` when getting.\n * - undefined when setting\n */\n crossOrigin(value) {\n // `null` can be set to unset a value\n if (typeof value === 'undefined') {\n if (this.$('img')) {\n // If the poster's element exists, give its value\n return this.$('img').crossOrigin;\n } else if (this.player_.tech_ && this.player_.tech_.isReady_) {\n // If not but the tech is ready, query the tech\n return this.player_.crossOrigin();\n }\n // Otherwise check options as the poster is usually set before the state of crossorigin\n // can be retrieved by the getter\n return this.player_.options_.crossOrigin || this.player_.options_.crossorigin || null;\n }\n if (value !== null && value !== 'anonymous' && value !== 'use-credentials') {\n this.player_.log.warn(`crossOrigin must be null, \"anonymous\" or \"use-credentials\", given \"${value}\"`);\n return;\n }\n if (this.$('img')) {\n this.$('img').crossOrigin = value;\n }\n return;\n }\n\n /**\n * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n *\n * @listens Player#posterchange\n *\n * @param {Event} [event]\n * The `Player#posterchange` event that triggered this function.\n */\n update(event) {\n const url = this.player().poster();\n this.setSrc(url);\n\n // If there's no poster source we should display:none on this component\n // so it's not still clickable or right-clickable\n if (url) {\n this.show();\n } else {\n this.hide();\n }\n }\n\n /**\n * Set the source of the `PosterImage` depending on the display method. (Re)creates\n * the inner picture and img elementss when needed.\n *\n * @param {string} [url]\n * The URL to the source for the `PosterImage`. If not specified or falsy,\n * any source and ant inner picture/img are removed.\n */\n setSrc(url) {\n if (!url) {\n this.el_.textContent = '';\n return;\n }\n if (!this.$('img')) {\n this.el_.appendChild(createEl('picture', {\n className: 'vjs-poster',\n // Don't want poster to be tabbable.\n tabIndex: -1\n }, {}, createEl('img', {\n loading: 'lazy',\n crossOrigin: this.crossOrigin()\n }, {\n alt: ''\n })));\n }\n this.$('img').src = url;\n }\n\n /**\n * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n *\n * @listens tap\n * @listens click\n * @listens keydown\n *\n * @param {Event} event\n + The `click`, `tap` or `keydown` event that caused this function to be called.\n */\n handleClick(event) {\n // We don't want a click to trigger playback when controls are disabled\n if (!this.player_.controls()) {\n return;\n }\n if (this.player_.tech(true)) {\n this.player_.tech(true).focus();\n }\n if (this.player_.paused()) {\n silencePromise(this.player_.play());\n } else {\n this.player_.pause();\n }\n }\n }\n\n /**\n * Get or set the `PosterImage`'s crossorigin option. For the HTML5 player, this\n * sets the `crossOrigin` property on the `<img>` tag to control the CORS\n * behavior.\n *\n * @param {string|null} [value]\n * The value to set the `PosterImages`'s crossorigin to. If an argument is\n * given, must be one of `anonymous` or `use-credentials`.\n *\n * @return {string|null|undefined}\n * - The current crossorigin value of the `Player` when getting.\n * - undefined when setting\n */\n PosterImage.prototype.crossorigin = PosterImage.prototype.crossOrigin;\n Component$1.registerComponent('PosterImage', PosterImage);\n\n /**\n * @file text-track-display.js\n */\n const darkGray = '#222';\n const lightGray = '#ccc';\n const fontMap = {\n monospace: 'monospace',\n sansSerif: 'sans-serif',\n serif: 'serif',\n monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n monospaceSerif: '\"Courier New\", monospace',\n proportionalSansSerif: 'sans-serif',\n proportionalSerif: 'serif',\n casual: '\"Comic Sans MS\", Impact, fantasy',\n script: '\"Monotype Corsiva\", cursive',\n smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n };\n\n /**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n * Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n * Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n * The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\n function constructColor(color, opacity) {\n let hex;\n if (color.length === 4) {\n // color looks like \"#f0e\"\n hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n } else if (color.length === 7) {\n // color looks like \"#f604e2\"\n hex = color.slice(1);\n } else {\n throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n }\n return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n }\n\n /**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n * The DOM element to be styled.\n *\n * @param {string} style\n * The CSS property on the element that should be styled.\n *\n * @param {string} rule\n * The style rule that should be applied to the property.\n *\n * @private\n */\n function tryUpdateStyle(el, style, rule) {\n try {\n el.style[style] = rule;\n } catch (e) {\n // Satisfies linter.\n return;\n }\n }\n\n /**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n class TextTrackDisplay extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function to call when `TextTrackDisplay` is ready.\n */\n constructor(player, options, ready) {\n super(player, options, ready);\n const updateDisplayHandler = e => this.updateDisplay(e);\n player.on('loadstart', e => this.toggleDisplay(e));\n player.on('texttrackchange', updateDisplayHandler);\n player.on('loadedmetadata', e => this.preselectTrack(e));\n\n // This used to be called during player init, but was causing an error\n // if a track should show by default and the display hadn't loaded yet.\n // Should probably be moved to an external track loader when we support\n // tracks that don't need a display.\n player.ready(bind_(this, function () {\n if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n this.hide();\n return;\n }\n player.on('fullscreenchange', updateDisplayHandler);\n player.on('playerresize', updateDisplayHandler);\n const screenOrientation = window.screen.orientation || window;\n const changeOrientationEvent = window.screen.orientation ? 'change' : 'orientationchange';\n screenOrientation.addEventListener(changeOrientationEvent, updateDisplayHandler);\n player.on('dispose', () => screenOrientation.removeEventListener(changeOrientationEvent, updateDisplayHandler));\n const tracks = this.options_.playerOptions.tracks || [];\n for (let i = 0; i < tracks.length; i++) {\n this.player_.addRemoteTextTrack(tracks[i], true);\n }\n this.preselectTrack();\n }));\n }\n\n /**\n * Preselect a track following this precedence:\n * - matches the previously selected {@link TextTrack}'s language and kind\n * - matches the previously selected {@link TextTrack}'s language only\n * - is the first default captions track\n * - is the first default descriptions track\n *\n * @listens Player#loadstart\n */\n preselectTrack() {\n const modes = {\n captions: 1,\n subtitles: 1\n };\n const trackList = this.player_.textTracks();\n const userPref = this.player_.cache_.selectedLanguage;\n let firstDesc;\n let firstCaptions;\n let preferredTrack;\n for (let i = 0; i < trackList.length; i++) {\n const track = trackList[i];\n if (userPref && userPref.enabled && userPref.language && userPref.language === track.language && track.kind in modes) {\n // Always choose the track that matches both language and kind\n if (track.kind === userPref.kind) {\n preferredTrack = track;\n // or choose the first track that matches language\n } else if (!preferredTrack) {\n preferredTrack = track;\n }\n\n // clear everything if offTextTrackMenuItem was clicked\n } else if (userPref && !userPref.enabled) {\n preferredTrack = null;\n firstDesc = null;\n firstCaptions = null;\n } else if (track.default) {\n if (track.kind === 'descriptions' && !firstDesc) {\n firstDesc = track;\n } else if (track.kind in modes && !firstCaptions) {\n firstCaptions = track;\n }\n }\n }\n\n // The preferredTrack matches the user preference and takes\n // precedence over all the other tracks.\n // So, display the preferredTrack before the first default track\n // and the subtitles/captions track before the descriptions track\n if (preferredTrack) {\n preferredTrack.mode = 'showing';\n } else if (firstCaptions) {\n firstCaptions.mode = 'showing';\n } else if (firstDesc) {\n firstDesc.mode = 'showing';\n }\n }\n\n /**\n * Turn display of {@link TextTrack}'s from the current state into the other state.\n * There are only two states:\n * - 'shown'\n * - 'hidden'\n *\n * @listens Player#loadstart\n */\n toggleDisplay() {\n if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n this.hide();\n } else {\n this.show();\n }\n }\n\n /**\n * Create the {@link Component}'s DOM element.\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-text-track-display'\n }, {\n 'translate': 'yes',\n 'aria-live': 'off',\n 'aria-atomic': 'true'\n });\n }\n\n /**\n * Clear all displayed {@link TextTrack}s.\n */\n clearDisplay() {\n if (typeof window.WebVTT === 'function') {\n window.WebVTT.processCues(window, [], this.el_);\n }\n }\n\n /**\n * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n * a {@link Player#fullscreenchange} is fired.\n *\n * @listens Player#texttrackchange\n * @listens Player#fullscreenchange\n */\n updateDisplay() {\n const tracks = this.player_.textTracks();\n const allowMultipleShowingTracks = this.options_.allowMultipleShowingTracks;\n this.clearDisplay();\n if (allowMultipleShowingTracks) {\n const showingTracks = [];\n for (let i = 0; i < tracks.length; ++i) {\n const track = tracks[i];\n if (track.mode !== 'showing') {\n continue;\n }\n showingTracks.push(track);\n }\n this.updateForTrack(showingTracks);\n return;\n }\n\n // Track display prioritization model: if multiple tracks are 'showing',\n // display the first 'subtitles' or 'captions' track which is 'showing',\n // otherwise display the first 'descriptions' track which is 'showing'\n\n let descriptionsTrack = null;\n let captionsSubtitlesTrack = null;\n let i = tracks.length;\n while (i--) {\n const track = tracks[i];\n if (track.mode === 'showing') {\n if (track.kind === 'descriptions') {\n descriptionsTrack = track;\n } else {\n captionsSubtitlesTrack = track;\n }\n }\n }\n if (captionsSubtitlesTrack) {\n if (this.getAttribute('aria-live') !== 'off') {\n this.setAttribute('aria-live', 'off');\n }\n this.updateForTrack(captionsSubtitlesTrack);\n } else if (descriptionsTrack) {\n if (this.getAttribute('aria-live') !== 'assertive') {\n this.setAttribute('aria-live', 'assertive');\n }\n this.updateForTrack(descriptionsTrack);\n }\n }\n\n /**\n * Style {@Link TextTrack} activeCues according to {@Link TextTrackSettings}.\n *\n * @param {TextTrack} track\n * Text track object containing active cues to style.\n */\n updateDisplayState(track) {\n const overrides = this.player_.textTrackSettings.getValues();\n const cues = track.activeCues;\n let i = cues.length;\n while (i--) {\n const cue = cues[i];\n if (!cue) {\n continue;\n }\n const cueDiv = cue.displayState;\n if (overrides.color) {\n cueDiv.firstChild.style.color = overrides.color;\n }\n if (overrides.textOpacity) {\n tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n }\n if (overrides.backgroundColor) {\n cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n }\n if (overrides.backgroundOpacity) {\n tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n }\n if (overrides.windowColor) {\n if (overrides.windowOpacity) {\n tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n } else {\n cueDiv.style.backgroundColor = overrides.windowColor;\n }\n }\n if (overrides.edgeStyle) {\n if (overrides.edgeStyle === 'dropshadow') {\n cueDiv.firstChild.style.textShadow = `2px 2px 3px ${darkGray}, 2px 2px 4px ${darkGray}, 2px 2px 5px ${darkGray}`;\n } else if (overrides.edgeStyle === 'raised') {\n cueDiv.firstChild.style.textShadow = `1px 1px ${darkGray}, 2px 2px ${darkGray}, 3px 3px ${darkGray}`;\n } else if (overrides.edgeStyle === 'depressed') {\n cueDiv.firstChild.style.textShadow = `1px 1px ${lightGray}, 0 1px ${lightGray}, -1px -1px ${darkGray}, 0 -1px ${darkGray}`;\n } else if (overrides.edgeStyle === 'uniform') {\n cueDiv.firstChild.style.textShadow = `0 0 4px ${darkGray}, 0 0 4px ${darkGray}, 0 0 4px ${darkGray}, 0 0 4px ${darkGray}`;\n }\n }\n if (overrides.fontPercent && overrides.fontPercent !== 1) {\n const fontSize = window.parseFloat(cueDiv.style.fontSize);\n cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n cueDiv.style.height = 'auto';\n cueDiv.style.top = 'auto';\n }\n if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n if (overrides.fontFamily === 'small-caps') {\n cueDiv.firstChild.style.fontVariant = 'small-caps';\n } else {\n cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n }\n }\n }\n }\n\n /**\n * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.\n *\n * @param {TextTrack|TextTrack[]} tracks\n * Text track object or text track array to be added to the list.\n */\n updateForTrack(tracks) {\n if (!Array.isArray(tracks)) {\n tracks = [tracks];\n }\n if (typeof window.WebVTT !== 'function' || tracks.every(track => {\n return !track.activeCues;\n })) {\n return;\n }\n const cues = [];\n\n // push all active track cues\n for (let i = 0; i < tracks.length; ++i) {\n const track = tracks[i];\n for (let j = 0; j < track.activeCues.length; ++j) {\n cues.push(track.activeCues[j]);\n }\n }\n\n // removes all cues before it processes new ones\n window.WebVTT.processCues(window, cues, this.el_);\n\n // add unique class to each language text track & add settings styling if necessary\n for (let i = 0; i < tracks.length; ++i) {\n const track = tracks[i];\n for (let j = 0; j < track.activeCues.length; ++j) {\n const cueEl = track.activeCues[j].displayState;\n addClass(cueEl, 'vjs-text-track-cue', 'vjs-text-track-cue-' + (track.language ? track.language : i));\n if (track.language) {\n setAttribute(cueEl, 'lang', track.language);\n }\n }\n if (this.player_.textTrackSettings) {\n this.updateDisplayState(track);\n }\n }\n }\n }\n Component$1.registerComponent('TextTrackDisplay', TextTrackDisplay);\n\n /**\n * @file loading-spinner.js\n */\n\n /**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n class LoadingSpinner extends Component$1 {\n /**\n * Create the `LoadingSpinner`s DOM element.\n *\n * @return {Element}\n * The dom element that gets created.\n */\n createEl() {\n const isAudio = this.player_.isAudio();\n const playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n const controlText = createEl('span', {\n className: 'vjs-control-text',\n textContent: this.localize('{1} is loading.', [playerType])\n });\n const el = super.createEl('div', {\n className: 'vjs-loading-spinner',\n dir: 'ltr'\n });\n el.appendChild(controlText);\n return el;\n }\n\n /**\n * Update control text on languagechange\n */\n handleLanguagechange() {\n this.$('.vjs-control-text').textContent = this.localize('{1} is loading.', [this.player_.isAudio() ? 'Audio Player' : 'Video Player']);\n }\n }\n Component$1.registerComponent('LoadingSpinner', LoadingSpinner);\n\n /**\n * @file button.js\n */\n\n /**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n class Button extends ClickableComponent {\n /**\n * Create the `Button`s DOM element.\n *\n * @param {string} [tag=\"button\"]\n * The element's node type. This argument is IGNORED: no matter what\n * is passed, it will always create a `button` element.\n *\n * @param {Object} [props={}]\n * An object of properties that should be set on the element.\n *\n * @param {Object} [attributes={}]\n * An object of attributes that should be set on the element.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl(tag, props = {}, attributes = {}) {\n tag = 'button';\n props = Object.assign({\n className: this.buildCSSClass()\n }, props);\n\n // Add attributes for button element\n attributes = Object.assign({\n // Necessary since the default button type is \"submit\"\n type: 'button'\n }, attributes);\n const el = createEl(tag, props, attributes);\n el.appendChild(createEl('span', {\n className: 'vjs-icon-placeholder'\n }, {\n 'aria-hidden': true\n }));\n this.createControlTextEl(el);\n return el;\n }\n\n /**\n * Add a child `Component` inside of this `Button`.\n *\n * @param {string|Component} child\n * The name or instance of a child to add.\n *\n * @param {Object} [options={}]\n * The key/value store of options that will get passed to children of\n * the child.\n *\n * @return {Component}\n * The `Component` that gets added as a child. When using a string the\n * `Component` will get created by this process.\n *\n * @deprecated since version 5\n */\n addChild(child, options = {}) {\n const className = this.constructor.name;\n log$1.warn(`Adding an actionable (user controllable) child to a Button (${className}) is not supported; use a ClickableComponent instead.`);\n\n // Avoid the error message generated by ClickableComponent's addChild method\n return Component$1.prototype.addChild.call(this, child, options);\n }\n\n /**\n * Enable the `Button` element so that it can be activated or clicked. Use this with\n * {@link Button#disable}.\n */\n enable() {\n super.enable();\n this.el_.removeAttribute('disabled');\n }\n\n /**\n * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n * {@link Button#enable}.\n */\n disable() {\n super.disable();\n this.el_.setAttribute('disabled', 'disabled');\n }\n\n /**\n * This gets called when a `Button` has focus and `keydown` is triggered via a key\n * press.\n *\n * @param {Event} event\n * The event that caused this function to get called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Ignore Space or Enter key operation, which is handled by the browser for\n // a button - though not for its super class, ClickableComponent. Also,\n // prevent the event from propagating through the DOM and triggering Player\n // hotkeys. We do not preventDefault here because we _want_ the browser to\n // handle it.\n if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n event.stopPropagation();\n return;\n }\n\n // Pass keypress handling up for unsupported keys\n super.handleKeyDown(event);\n }\n }\n Component$1.registerComponent('Button', Button);\n\n /**\n * @file big-play-button.js\n */\n\n /**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n class BigPlayButton extends Button {\n constructor(player, options) {\n super(player, options);\n this.mouseused_ = false;\n this.on('mousedown', e => this.handleMouseDown(e));\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n */\n buildCSSClass() {\n return 'vjs-big-play-button';\n }\n\n /**\n * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n * for more detailed information on what a click can be.\n *\n * @param {KeyboardEvent} event\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n const playPromise = this.player_.play();\n\n // exit early if clicked via the mouse\n if (this.mouseused_ && event.clientX && event.clientY) {\n silencePromise(playPromise);\n if (this.player_.tech(true)) {\n this.player_.tech(true).focus();\n }\n return;\n }\n const cb = this.player_.getChild('controlBar');\n const playToggle = cb && cb.getChild('playToggle');\n if (!playToggle) {\n this.player_.tech(true).focus();\n return;\n }\n const playFocus = () => playToggle.focus();\n if (isPromise(playPromise)) {\n playPromise.then(playFocus, () => {});\n } else {\n this.setTimeout(playFocus, 1);\n }\n }\n handleKeyDown(event) {\n this.mouseused_ = false;\n super.handleKeyDown(event);\n }\n handleMouseDown(event) {\n this.mouseused_ = true;\n }\n }\n\n /**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @protected\n */\n BigPlayButton.prototype.controlText_ = 'Play Video';\n Component$1.registerComponent('BigPlayButton', BigPlayButton);\n\n /**\n * @file close-button.js\n */\n\n /**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n class CloseButton extends Button {\n /**\n * Creates an instance of the this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.controlText(options && options.controlText || this.localize('Close'));\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-close-button ${super.buildCSSClass()}`;\n }\n\n /**\n * This gets called when a `CloseButton` gets clicked. See\n * {@link ClickableComponent#handleClick} for more information on when\n * this will be triggered\n *\n * @param {Event} event\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n * @fires CloseButton#close\n */\n handleClick(event) {\n /**\n * Triggered when the a `CloseButton` is clicked.\n *\n * @event CloseButton#close\n * @type {Event}\n *\n * @property {boolean} [bubbles=false]\n * set to false so that the close event does not\n * bubble up to parents if there is no listener\n */\n this.trigger({\n type: 'close',\n bubbles: false\n });\n }\n /**\n * Event handler that is called when a `CloseButton` receives a\n * `keydown` event.\n *\n * By default, if the key is Esc, it will trigger a `click` event.\n *\n * @param {Event} event\n * The `keydown` event that caused this function to be called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Esc button will trigger `click` event\n if (keycode.isEventKey(event, 'Esc')) {\n event.preventDefault();\n event.stopPropagation();\n this.trigger('click');\n } else {\n // Pass keypress handling up for unsupported keys\n super.handleKeyDown(event);\n }\n }\n }\n Component$1.registerComponent('CloseButton', CloseButton);\n\n /**\n * @file play-toggle.js\n */\n\n /**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n class PlayToggle extends Button {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n */\n constructor(player, options = {}) {\n super(player, options);\n\n // show or hide replay icon\n options.replay = options.replay === undefined || options.replay;\n this.on(player, 'play', e => this.handlePlay(e));\n this.on(player, 'pause', e => this.handlePause(e));\n if (options.replay) {\n this.on(player, 'ended', e => this.handleEnded(e));\n }\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-play-control ${super.buildCSSClass()}`;\n }\n\n /**\n * This gets called when an `PlayToggle` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n if (this.player_.paused()) {\n silencePromise(this.player_.play());\n } else {\n this.player_.pause();\n }\n }\n\n /**\n * This gets called once after the video has ended and the user seeks so that\n * we can change the replay button back to a play button.\n *\n * @param {Event} [event]\n * The event that caused this function to run.\n *\n * @listens Player#seeked\n */\n handleSeeked(event) {\n this.removeClass('vjs-ended');\n if (this.player_.paused()) {\n this.handlePause(event);\n } else {\n this.handlePlay(event);\n }\n }\n\n /**\n * Add the vjs-playing class to the element so it can change appearance.\n *\n * @param {Event} [event]\n * The event that caused this function to run.\n *\n * @listens Player#play\n */\n handlePlay(event) {\n this.removeClass('vjs-ended', 'vjs-paused');\n this.addClass('vjs-playing');\n // change the button text to \"Pause\"\n this.controlText('Pause');\n }\n\n /**\n * Add the vjs-paused class to the element so it can change appearance.\n *\n * @param {Event} [event]\n * The event that caused this function to run.\n *\n * @listens Player#pause\n */\n handlePause(event) {\n this.removeClass('vjs-playing');\n this.addClass('vjs-paused');\n // change the button text to \"Play\"\n this.controlText('Play');\n }\n\n /**\n * Add the vjs-ended class to the element so it can change appearance\n *\n * @param {Event} [event]\n * The event that caused this function to run.\n *\n * @listens Player#ended\n */\n handleEnded(event) {\n this.removeClass('vjs-playing');\n this.addClass('vjs-ended');\n // change the button text to \"Replay\"\n this.controlText('Replay');\n\n // on the next seek remove the replay button\n this.one(this.player_, 'seeked', e => this.handleSeeked(e));\n }\n }\n\n /**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n PlayToggle.prototype.controlText_ = 'Play';\n Component$1.registerComponent('PlayToggle', PlayToggle);\n\n /**\n * @file time-display.js\n */\n\n /**\n * Displays time information about the video\n *\n * @extends Component\n */\n class TimeDisplay extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.on(player, ['timeupdate', 'ended'], e => this.updateContent(e));\n this.updateTextNode_();\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const className = this.buildCSSClass();\n const el = super.createEl('div', {\n className: `${className} vjs-time-control vjs-control`\n });\n const span = createEl('span', {\n className: 'vjs-control-text',\n textContent: `${this.localize(this.labelText_)}\\u00a0`\n }, {\n role: 'presentation'\n });\n el.appendChild(span);\n this.contentEl_ = createEl('span', {\n className: `${className}-display`\n }, {\n // span elements have no implicit role, but some screen readers (notably VoiceOver)\n // treat them as a break between items in the DOM when using arrow keys\n // (or left-to-right swipes on iOS) to read contents of a page. Using\n // role='presentation' causes VoiceOver to NOT treat this span as a break.\n role: 'presentation'\n });\n el.appendChild(this.contentEl_);\n return el;\n }\n dispose() {\n this.contentEl_ = null;\n this.textNode_ = null;\n super.dispose();\n }\n\n /**\n * Updates the time display text node with a new time\n *\n * @param {number} [time=0] the time to update to\n *\n * @private\n */\n updateTextNode_(time = 0) {\n time = formatTime(time);\n if (this.formattedTime_ === time) {\n return;\n }\n this.formattedTime_ = time;\n this.requestNamedAnimationFrame('TimeDisplay#updateTextNode_', () => {\n if (!this.contentEl_) {\n return;\n }\n let oldNode = this.textNode_;\n if (oldNode && this.contentEl_.firstChild !== oldNode) {\n oldNode = null;\n log$1.warn('TimeDisplay#updateTextnode_: Prevented replacement of text node element since it was no longer a child of this node. Appending a new node instead.');\n }\n this.textNode_ = document.createTextNode(this.formattedTime_);\n if (!this.textNode_) {\n return;\n }\n if (oldNode) {\n this.contentEl_.replaceChild(this.textNode_, oldNode);\n } else {\n this.contentEl_.appendChild(this.textNode_);\n }\n });\n }\n\n /**\n * To be filled out in the child class, should update the displayed time\n * in accordance with the fact that the current time has changed.\n *\n * @param {Event} [event]\n * The `timeupdate` event that caused this to run.\n *\n * @listens Player#timeupdate\n */\n updateContent(event) {}\n }\n\n /**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n TimeDisplay.prototype.labelText_ = 'Time';\n\n /**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @protected\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n TimeDisplay.prototype.controlText_ = 'Time';\n Component$1.registerComponent('TimeDisplay', TimeDisplay);\n\n /**\n * @file current-time-display.js\n */\n\n /**\n * Displays the current time\n *\n * @extends Component\n */\n class CurrentTimeDisplay extends TimeDisplay {\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return 'vjs-current-time';\n }\n\n /**\n * Update current time display\n *\n * @param {Event} [event]\n * The `timeupdate` event that caused this function to run.\n *\n * @listens Player#timeupdate\n */\n updateContent(event) {\n // Allows for smooth scrubbing, when player can't keep up.\n let time;\n if (this.player_.ended()) {\n time = this.player_.duration();\n } else {\n time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n }\n this.updateTextNode_(time);\n }\n }\n\n /**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n CurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n\n /**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @protected\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n CurrentTimeDisplay.prototype.controlText_ = 'Current Time';\n Component$1.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n\n /**\n * @file duration-display.js\n */\n\n /**\n * Displays the duration\n *\n * @extends Component\n */\n class DurationDisplay extends TimeDisplay {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n const updateContent = e => this.updateContent(e);\n\n // we do not want to/need to throttle duration changes,\n // as they should always display the changed duration as\n // it has changed\n this.on(player, 'durationchange', updateContent);\n\n // Listen to loadstart because the player duration is reset when a new media element is loaded,\n // but the durationchange on the user agent will not fire.\n // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n this.on(player, 'loadstart', updateContent);\n\n // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n // listeners could have broken dependent applications/libraries. These\n // can likely be removed for 7.0.\n this.on(player, 'loadedmetadata', updateContent);\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return 'vjs-duration';\n }\n\n /**\n * Update duration time display.\n *\n * @param {Event} [event]\n * The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n * this function to be called.\n *\n * @listens Player#durationchange\n * @listens Player#timeupdate\n * @listens Player#loadedmetadata\n */\n updateContent(event) {\n const duration = this.player_.duration();\n this.updateTextNode_(duration);\n }\n }\n\n /**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n DurationDisplay.prototype.labelText_ = 'Duration';\n\n /**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @protected\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n DurationDisplay.prototype.controlText_ = 'Duration';\n Component$1.registerComponent('DurationDisplay', DurationDisplay);\n\n /**\n * @file time-divider.js\n */\n\n /**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n class TimeDivider extends Component$1 {\n /**\n * Create the component's DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl('div', {\n className: 'vjs-time-control vjs-time-divider'\n }, {\n // this element and its contents can be hidden from assistive techs since\n // it is made extraneous by the announcement of the control text\n // for the current time and duration displays\n 'aria-hidden': true\n });\n const div = super.createEl('div');\n const span = super.createEl('span', {\n textContent: '/'\n });\n div.appendChild(span);\n el.appendChild(div);\n return el;\n }\n }\n Component$1.registerComponent('TimeDivider', TimeDivider);\n\n /**\n * @file remaining-time-display.js\n */\n\n /**\n * Displays the time left in the video\n *\n * @extends Component\n */\n class RemainingTimeDisplay extends TimeDisplay {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.on(player, 'durationchange', e => this.updateContent(e));\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return 'vjs-remaining-time';\n }\n\n /**\n * Create the `Component`'s DOM element with the \"minus\" character prepend to the time\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl();\n if (this.options_.displayNegative !== false) {\n el.insertBefore(createEl('span', {}, {\n 'aria-hidden': true\n }, '-'), this.contentEl_);\n }\n return el;\n }\n\n /**\n * Update remaining time display.\n *\n * @param {Event} [event]\n * The `timeupdate` or `durationchange` event that caused this to run.\n *\n * @listens Player#timeupdate\n * @listens Player#durationchange\n */\n updateContent(event) {\n if (typeof this.player_.duration() !== 'number') {\n return;\n }\n let time;\n\n // @deprecated We should only use remainingTimeDisplay\n // as of video.js 7\n if (this.player_.ended()) {\n time = 0;\n } else if (this.player_.remainingTimeDisplay) {\n time = this.player_.remainingTimeDisplay();\n } else {\n time = this.player_.remainingTime();\n }\n this.updateTextNode_(time);\n }\n }\n\n /**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n RemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n\n /**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @protected\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n RemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\n Component$1.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n\n /**\n * @file live-display.js\n */\n\n // TODO - Future make it click to snap to live\n\n /**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n class LiveDisplay extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.updateShowing();\n this.on(this.player(), 'durationchange', e => this.updateShowing(e));\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl('div', {\n className: 'vjs-live-control vjs-control'\n });\n this.contentEl_ = createEl('div', {\n className: 'vjs-live-display'\n }, {\n 'aria-live': 'off'\n });\n this.contentEl_.appendChild(createEl('span', {\n className: 'vjs-control-text',\n textContent: `${this.localize('Stream Type')}\\u00a0`\n }));\n this.contentEl_.appendChild(document.createTextNode(this.localize('LIVE')));\n el.appendChild(this.contentEl_);\n return el;\n }\n dispose() {\n this.contentEl_ = null;\n super.dispose();\n }\n\n /**\n * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n * it accordingly\n *\n * @param {Event} [event]\n * The {@link Player#durationchange} event that caused this function to run.\n *\n * @listens Player#durationchange\n */\n updateShowing(event) {\n if (this.player().duration() === Infinity) {\n this.show();\n } else {\n this.hide();\n }\n }\n }\n Component$1.registerComponent('LiveDisplay', LiveDisplay);\n\n /**\n * @file seek-to-live.js\n */\n\n /**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n class SeekToLive extends Button {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.updateLiveEdgeStatus();\n if (this.player_.liveTracker) {\n this.updateLiveEdgeStatusHandler_ = e => this.updateLiveEdgeStatus(e);\n this.on(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);\n }\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl('button', {\n className: 'vjs-seek-to-live-control vjs-control'\n });\n this.textEl_ = createEl('span', {\n className: 'vjs-seek-to-live-text',\n textContent: this.localize('LIVE')\n }, {\n 'aria-hidden': 'true'\n });\n el.appendChild(this.textEl_);\n return el;\n }\n\n /**\n * Update the state of this button if we are at the live edge\n * or not\n */\n updateLiveEdgeStatus() {\n // default to live edge\n if (!this.player_.liveTracker || this.player_.liveTracker.atLiveEdge()) {\n this.setAttribute('aria-disabled', true);\n this.addClass('vjs-at-live-edge');\n this.controlText('Seek to live, currently playing live');\n } else {\n this.setAttribute('aria-disabled', false);\n this.removeClass('vjs-at-live-edge');\n this.controlText('Seek to live, currently behind live');\n }\n }\n\n /**\n * On click bring us as near to the live point as possible.\n * This requires that we wait for the next `live-seekable-change`\n * event which will happen every segment length seconds.\n */\n handleClick() {\n this.player_.liveTracker.seekToLiveEdge();\n }\n\n /**\n * Dispose of the element and stop tracking\n */\n dispose() {\n if (this.player_.liveTracker) {\n this.off(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);\n }\n this.textEl_ = null;\n super.dispose();\n }\n }\n /**\n * The text that should display over the `SeekToLive`s control. Added for localization.\n *\n * @type {string}\n * @protected\n */\n SeekToLive.prototype.controlText_ = 'Seek to live, currently playing live';\n Component$1.registerComponent('SeekToLive', SeekToLive);\n\n /**\n * @file num.js\n * @module num\n */\n\n /**\n * Keep a number between a min and a max value\n *\n * @param {number} number\n * The number to clamp\n *\n * @param {number} min\n * The minimum value\n * @param {number} max\n * The maximum value\n *\n * @return {number}\n * the clamped number\n */\n function clamp(number, min, max) {\n number = Number(number);\n return Math.min(max, Math.max(min, isNaN(number) ? min : number));\n }\n\n var Num = /*#__PURE__*/Object.freeze({\n __proto__: null,\n clamp: clamp\n });\n\n /**\n * @file slider.js\n */\n\n /**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n class Slider extends Component$1 {\n /**\n * Create an instance of this class\n *\n * @param { import('../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.handleMouseDown_ = e => this.handleMouseDown(e);\n this.handleMouseUp_ = e => this.handleMouseUp(e);\n this.handleKeyDown_ = e => this.handleKeyDown(e);\n this.handleClick_ = e => this.handleClick(e);\n this.handleMouseMove_ = e => this.handleMouseMove(e);\n this.update_ = e => this.update(e);\n\n // Set property names to bar to match with the child Slider class is looking for\n this.bar = this.getChild(this.options_.barName);\n\n // Set a horizontal or vertical class on the slider depending on the slider type\n this.vertical(!!this.options_.vertical);\n this.enable();\n }\n\n /**\n * Are controls are currently enabled for this slider or not.\n *\n * @return {boolean}\n * true if controls are enabled, false otherwise\n */\n enabled() {\n return this.enabled_;\n }\n\n /**\n * Enable controls for this slider if they are disabled\n */\n enable() {\n if (this.enabled()) {\n return;\n }\n this.on('mousedown', this.handleMouseDown_);\n this.on('touchstart', this.handleMouseDown_);\n this.on('keydown', this.handleKeyDown_);\n this.on('click', this.handleClick_);\n\n // TODO: deprecated, controlsvisible does not seem to be fired\n this.on(this.player_, 'controlsvisible', this.update);\n if (this.playerEvent) {\n this.on(this.player_, this.playerEvent, this.update);\n }\n this.removeClass('disabled');\n this.setAttribute('tabindex', 0);\n this.enabled_ = true;\n }\n\n /**\n * Disable controls for this slider if they are enabled\n */\n disable() {\n if (!this.enabled()) {\n return;\n }\n const doc = this.bar.el_.ownerDocument;\n this.off('mousedown', this.handleMouseDown_);\n this.off('touchstart', this.handleMouseDown_);\n this.off('keydown', this.handleKeyDown_);\n this.off('click', this.handleClick_);\n this.off(this.player_, 'controlsvisible', this.update_);\n this.off(doc, 'mousemove', this.handleMouseMove_);\n this.off(doc, 'mouseup', this.handleMouseUp_);\n this.off(doc, 'touchmove', this.handleMouseMove_);\n this.off(doc, 'touchend', this.handleMouseUp_);\n this.removeAttribute('tabindex');\n this.addClass('disabled');\n if (this.playerEvent) {\n this.off(this.player_, this.playerEvent, this.update);\n }\n this.enabled_ = false;\n }\n\n /**\n * Create the `Slider`s DOM element.\n *\n * @param {string} type\n * Type of element to create.\n *\n * @param {Object} [props={}]\n * List of properties in Object form.\n *\n * @param {Object} [attributes={}]\n * list of attributes in Object form.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl(type, props = {}, attributes = {}) {\n // Add the slider element class to all sub classes\n props.className = props.className + ' vjs-slider';\n props = Object.assign({\n tabIndex: 0\n }, props);\n attributes = Object.assign({\n 'role': 'slider',\n 'aria-valuenow': 0,\n 'aria-valuemin': 0,\n 'aria-valuemax': 100\n }, attributes);\n return super.createEl(type, props, attributes);\n }\n\n /**\n * Handle `mousedown` or `touchstart` events on the `Slider`.\n *\n * @param {MouseEvent} event\n * `mousedown` or `touchstart` event that triggered this function\n *\n * @listens mousedown\n * @listens touchstart\n * @fires Slider#slideractive\n */\n handleMouseDown(event) {\n const doc = this.bar.el_.ownerDocument;\n if (event.type === 'mousedown') {\n event.preventDefault();\n }\n // Do not call preventDefault() on touchstart in Chrome\n // to avoid console warnings. Use a 'touch-action: none' style\n // instead to prevent unintended scrolling.\n // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n if (event.type === 'touchstart' && !IS_CHROME) {\n event.preventDefault();\n }\n blockTextSelection();\n this.addClass('vjs-sliding');\n /**\n * Triggered when the slider is in an active state\n *\n * @event Slider#slideractive\n * @type {MouseEvent}\n */\n this.trigger('slideractive');\n this.on(doc, 'mousemove', this.handleMouseMove_);\n this.on(doc, 'mouseup', this.handleMouseUp_);\n this.on(doc, 'touchmove', this.handleMouseMove_);\n this.on(doc, 'touchend', this.handleMouseUp_);\n this.handleMouseMove(event, true);\n }\n\n /**\n * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n * The `mousemove` and `touchmove` events will only only trigger this function during\n * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n * {@link Slider#handleMouseUp}.\n *\n * @param {MouseEvent} event\n * `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n * this function\n * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false.\n *\n * @listens mousemove\n * @listens touchmove\n */\n handleMouseMove(event) {}\n\n /**\n * Handle `mouseup` or `touchend` events on the `Slider`.\n *\n * @param {MouseEvent} event\n * `mouseup` or `touchend` event that triggered this function.\n *\n * @listens touchend\n * @listens mouseup\n * @fires Slider#sliderinactive\n */\n handleMouseUp(event) {\n const doc = this.bar.el_.ownerDocument;\n unblockTextSelection();\n this.removeClass('vjs-sliding');\n /**\n * Triggered when the slider is no longer in an active state.\n *\n * @event Slider#sliderinactive\n * @type {Event}\n */\n this.trigger('sliderinactive');\n this.off(doc, 'mousemove', this.handleMouseMove_);\n this.off(doc, 'mouseup', this.handleMouseUp_);\n this.off(doc, 'touchmove', this.handleMouseMove_);\n this.off(doc, 'touchend', this.handleMouseUp_);\n this.update();\n }\n\n /**\n * Update the progress bar of the `Slider`.\n *\n * @return {number}\n * The percentage of progress the progress bar represents as a\n * number from 0 to 1.\n */\n update() {\n // In VolumeBar init we have a setTimeout for update that pops and update\n // to the end of the execution stack. The player is destroyed before then\n // update will cause an error\n // If there's no bar...\n if (!this.el_ || !this.bar) {\n return;\n }\n\n // clamp progress between 0 and 1\n // and only round to four decimal places, as we round to two below\n const progress = this.getProgress();\n if (progress === this.progress_) {\n return progress;\n }\n this.progress_ = progress;\n this.requestNamedAnimationFrame('Slider#update', () => {\n // Set the new bar width or height\n const sizeKey = this.vertical() ? 'height' : 'width';\n\n // Convert to a percentage for css value\n this.bar.el().style[sizeKey] = (progress * 100).toFixed(2) + '%';\n });\n return progress;\n }\n\n /**\n * Get the percentage of the bar that should be filled\n * but clamped and rounded.\n *\n * @return {number}\n * percentage filled that the slider is\n */\n getProgress() {\n return Number(clamp(this.getPercent(), 0, 1).toFixed(4));\n }\n\n /**\n * Calculate distance for slider\n *\n * @param {Event} event\n * The event that caused this function to run.\n *\n * @return {number}\n * The current position of the Slider.\n * - position.x for vertical `Slider`s\n * - position.y for horizontal `Slider`s\n */\n calculateDistance(event) {\n const position = getPointerPosition(this.el_, event);\n if (this.vertical()) {\n return position.y;\n }\n return position.x;\n }\n\n /**\n * Handle a `keydown` event on the `Slider`. Watches for left, right, up, and down\n * arrow keys. This function will only be called when the slider has focus. See\n * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n *\n * @param {KeyboardEvent} event\n * the `keydown` event that caused this function to run.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Left and Down Arrows\n if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n event.preventDefault();\n event.stopPropagation();\n this.stepBack();\n\n // Up and Right Arrows\n } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n event.preventDefault();\n event.stopPropagation();\n this.stepForward();\n } else {\n // Pass keydown handling up for unsupported keys\n super.handleKeyDown(event);\n }\n }\n\n /**\n * Listener for click events on slider, used to prevent clicks\n * from bubbling up to parent elements like button menus.\n *\n * @param {Object} event\n * Event that caused this object to run\n */\n handleClick(event) {\n event.stopPropagation();\n event.preventDefault();\n }\n\n /**\n * Get/set if slider is horizontal for vertical\n *\n * @param {boolean} [bool]\n * - true if slider is vertical,\n * - false is horizontal\n *\n * @return {boolean}\n * - true if slider is vertical, and getting\n * - false if the slider is horizontal, and getting\n */\n vertical(bool) {\n if (bool === undefined) {\n return this.vertical_ || false;\n }\n this.vertical_ = !!bool;\n if (this.vertical_) {\n this.addClass('vjs-slider-vertical');\n } else {\n this.addClass('vjs-slider-horizontal');\n }\n }\n }\n Component$1.registerComponent('Slider', Slider);\n\n /**\n * @file load-progress-bar.js\n */\n\n // get the percent width of a time compared to the total end\n const percentify = (time, end) => clamp(time / end * 100, 0, 100).toFixed(2) + '%';\n\n /**\n * Shows loading progress\n *\n * @extends Component\n */\n class LoadProgressBar extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.partEls_ = [];\n this.on(player, 'progress', e => this.update(e));\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl('div', {\n className: 'vjs-load-progress'\n });\n const wrapper = createEl('span', {\n className: 'vjs-control-text'\n });\n const loadedText = createEl('span', {\n textContent: this.localize('Loaded')\n });\n const separator = document.createTextNode(': ');\n this.percentageEl_ = createEl('span', {\n className: 'vjs-control-text-loaded-percentage',\n textContent: '0%'\n });\n el.appendChild(wrapper);\n wrapper.appendChild(loadedText);\n wrapper.appendChild(separator);\n wrapper.appendChild(this.percentageEl_);\n return el;\n }\n dispose() {\n this.partEls_ = null;\n this.percentageEl_ = null;\n super.dispose();\n }\n\n /**\n * Update progress bar\n *\n * @param {Event} [event]\n * The `progress` event that caused this function to run.\n *\n * @listens Player#progress\n */\n update(event) {\n this.requestNamedAnimationFrame('LoadProgressBar#update', () => {\n const liveTracker = this.player_.liveTracker;\n const buffered = this.player_.buffered();\n const duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : this.player_.duration();\n const bufferedEnd = this.player_.bufferedEnd();\n const children = this.partEls_;\n const percent = percentify(bufferedEnd, duration);\n if (this.percent_ !== percent) {\n // update the width of the progress bar\n this.el_.style.width = percent;\n // update the control-text\n textContent(this.percentageEl_, percent);\n this.percent_ = percent;\n }\n\n // add child elements to represent the individual buffered time ranges\n for (let i = 0; i < buffered.length; i++) {\n const start = buffered.start(i);\n const end = buffered.end(i);\n let part = children[i];\n if (!part) {\n part = this.el_.appendChild(createEl());\n children[i] = part;\n }\n\n // only update if changed\n if (part.dataset.start === start && part.dataset.end === end) {\n continue;\n }\n part.dataset.start = start;\n part.dataset.end = end;\n\n // set the percent based on the width of the progress bar (bufferedEnd)\n part.style.left = percentify(start, bufferedEnd);\n part.style.width = percentify(end - start, bufferedEnd);\n }\n\n // remove unused buffered range elements\n for (let i = children.length; i > buffered.length; i--) {\n this.el_.removeChild(children[i - 1]);\n }\n children.length = buffered.length;\n });\n }\n }\n Component$1.registerComponent('LoadProgressBar', LoadProgressBar);\n\n /**\n * @file time-tooltip.js\n */\n\n /**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n class TimeTooltip extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The {@link Player} that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);\n }\n\n /**\n * Create the time tooltip DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-time-tooltip'\n }, {\n 'aria-hidden': 'true'\n });\n }\n\n /**\n * Updates the position of the time tooltip relative to the `SeekBar`.\n *\n * @param {Object} seekBarRect\n * The `ClientRect` for the {@link SeekBar} element.\n *\n * @param {number} seekBarPoint\n * A number from 0 to 1, representing a horizontal reference point\n * from the left edge of the {@link SeekBar}\n */\n update(seekBarRect, seekBarPoint, content) {\n const tooltipRect = findPosition(this.el_);\n const playerRect = getBoundingClientRect(this.player_.el());\n const seekBarPointPx = seekBarRect.width * seekBarPoint;\n\n // do nothing if either rect isn't available\n // for example, if the player isn't in the DOM for testing\n if (!playerRect || !tooltipRect) {\n return;\n }\n\n // This is the space left of the `seekBarPoint` available within the bounds\n // of the player. We calculate any gap between the left edge of the player\n // and the left edge of the `SeekBar` and add the number of pixels in the\n // `SeekBar` before hitting the `seekBarPoint`\n const spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx;\n\n // This is the space right of the `seekBarPoint` available within the bounds\n // of the player. We calculate the number of pixels from the `seekBarPoint`\n // to the right edge of the `SeekBar` and add to that any gap between the\n // right edge of the `SeekBar` and the player.\n const spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right);\n\n // This is the number of pixels by which the tooltip will need to be pulled\n // further to the right to center it over the `seekBarPoint`.\n let pullTooltipBy = tooltipRect.width / 2;\n\n // Adjust the `pullTooltipBy` distance to the left or right depending on\n // the results of the space calculations above.\n if (spaceLeftOfPoint < pullTooltipBy) {\n pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n } else if (spaceRightOfPoint < pullTooltipBy) {\n pullTooltipBy = spaceRightOfPoint;\n }\n\n // Due to the imprecision of decimal/ratio based calculations and varying\n // rounding behaviors, there are cases where the spacing adjustment is off\n // by a pixel or two. This adds insurance to these calculations.\n if (pullTooltipBy < 0) {\n pullTooltipBy = 0;\n } else if (pullTooltipBy > tooltipRect.width) {\n pullTooltipBy = tooltipRect.width;\n }\n\n // prevent small width fluctuations within 0.4px from\n // changing the value below.\n // This really helps for live to prevent the play\n // progress time tooltip from jittering\n pullTooltipBy = Math.round(pullTooltipBy);\n this.el_.style.right = `-${pullTooltipBy}px`;\n this.write(content);\n }\n\n /**\n * Write the time to the tooltip DOM element.\n *\n * @param {string} content\n * The formatted time for the tooltip.\n */\n write(content) {\n textContent(this.el_, content);\n }\n\n /**\n * Updates the position of the time tooltip relative to the `SeekBar`.\n *\n * @param {Object} seekBarRect\n * The `ClientRect` for the {@link SeekBar} element.\n *\n * @param {number} seekBarPoint\n * A number from 0 to 1, representing a horizontal reference point\n * from the left edge of the {@link SeekBar}\n *\n * @param {number} time\n * The time to update the tooltip to, not used during live playback\n *\n * @param {Function} cb\n * A function that will be called during the request animation frame\n * for tooltips that need to do additional animations from the default\n */\n updateTime(seekBarRect, seekBarPoint, time, cb) {\n this.requestNamedAnimationFrame('TimeTooltip#updateTime', () => {\n let content;\n const duration = this.player_.duration();\n if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {\n const liveWindow = this.player_.liveTracker.liveWindow();\n const secondsBehind = liveWindow - seekBarPoint * liveWindow;\n content = (secondsBehind < 1 ? '' : '-') + formatTime(secondsBehind, liveWindow);\n } else {\n content = formatTime(time, duration);\n }\n this.update(seekBarRect, seekBarPoint, content);\n if (cb) {\n cb();\n }\n });\n }\n }\n Component$1.registerComponent('TimeTooltip', TimeTooltip);\n\n /**\n * @file play-progress-bar.js\n */\n\n /**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n class PlayProgressBar extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The {@link Player} that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);\n }\n\n /**\n * Create the the DOM element for this class.\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-play-progress vjs-slider-bar'\n }, {\n 'aria-hidden': 'true'\n });\n }\n\n /**\n * Enqueues updates to its own DOM as well as the DOM of its\n * {@link TimeTooltip} child.\n *\n * @param {Object} seekBarRect\n * The `ClientRect` for the {@link SeekBar} element.\n *\n * @param {number} seekBarPoint\n * A number from 0 to 1, representing a horizontal reference point\n * from the left edge of the {@link SeekBar}\n */\n update(seekBarRect, seekBarPoint) {\n const timeTooltip = this.getChild('timeTooltip');\n if (!timeTooltip) {\n return;\n }\n const time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n timeTooltip.updateTime(seekBarRect, seekBarPoint, time);\n }\n }\n\n /**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n PlayProgressBar.prototype.options_ = {\n children: []\n };\n\n // Time tooltips should not be added to a player on mobile devices\n if (!IS_IOS && !IS_ANDROID) {\n PlayProgressBar.prototype.options_.children.push('timeTooltip');\n }\n Component$1.registerComponent('PlayProgressBar', PlayProgressBar);\n\n /**\n * @file mouse-time-display.js\n */\n\n /**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n class MouseTimeDisplay extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The {@link Player} that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);\n }\n\n /**\n * Create the DOM element for this class.\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-mouse-display'\n });\n }\n\n /**\n * Enqueues updates to its own DOM as well as the DOM of its\n * {@link TimeTooltip} child.\n *\n * @param {Object} seekBarRect\n * The `ClientRect` for the {@link SeekBar} element.\n *\n * @param {number} seekBarPoint\n * A number from 0 to 1, representing a horizontal reference point\n * from the left edge of the {@link SeekBar}\n */\n update(seekBarRect, seekBarPoint) {\n const time = seekBarPoint * this.player_.duration();\n this.getChild('timeTooltip').updateTime(seekBarRect, seekBarPoint, time, () => {\n this.el_.style.left = `${seekBarRect.width * seekBarPoint}px`;\n });\n }\n }\n\n /**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n MouseTimeDisplay.prototype.options_ = {\n children: ['timeTooltip']\n };\n Component$1.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\n\n /**\n * @file seek-bar.js\n */\n\n // The number of seconds the `step*` functions move the timeline.\n const STEP_SECONDS = 5;\n\n // The multiplier of STEP_SECONDS that PgUp/PgDown move the timeline.\n const PAGE_KEY_MULTIPLIER = 12;\n\n /**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n class SeekBar extends Slider {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.setEventHandlers_();\n }\n\n /**\n * Sets the event handlers\n *\n * @private\n */\n setEventHandlers_() {\n this.update_ = bind_(this, this.update);\n this.update = throttle(this.update_, UPDATE_REFRESH_INTERVAL);\n this.on(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n if (this.player_.liveTracker) {\n this.on(this.player_.liveTracker, 'liveedgechange', this.update);\n }\n\n // when playing, let's ensure we smoothly update the play progress bar\n // via an interval\n this.updateInterval = null;\n this.enableIntervalHandler_ = e => this.enableInterval_(e);\n this.disableIntervalHandler_ = e => this.disableInterval_(e);\n this.on(this.player_, ['playing'], this.enableIntervalHandler_);\n this.on(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_);\n\n // we don't need to update the play progress if the document is hidden,\n // also, this causes the CPU to spike and eventually crash the page on IE11.\n if ('hidden' in document && 'visibilityState' in document) {\n this.on(document, 'visibilitychange', this.toggleVisibility_);\n }\n }\n toggleVisibility_(e) {\n if (document.visibilityState === 'hidden') {\n this.cancelNamedAnimationFrame('SeekBar#update');\n this.cancelNamedAnimationFrame('Slider#update');\n this.disableInterval_(e);\n } else {\n if (!this.player_.ended() && !this.player_.paused()) {\n this.enableInterval_();\n }\n\n // we just switched back to the page and someone may be looking, so, update ASAP\n this.update();\n }\n }\n enableInterval_() {\n if (this.updateInterval) {\n return;\n }\n this.updateInterval = this.setInterval(this.update, UPDATE_REFRESH_INTERVAL);\n }\n disableInterval_(e) {\n if (this.player_.liveTracker && this.player_.liveTracker.isLive() && e && e.type !== 'ended') {\n return;\n }\n if (!this.updateInterval) {\n return;\n }\n this.clearInterval(this.updateInterval);\n this.updateInterval = null;\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-progress-holder'\n }, {\n 'aria-label': this.localize('Progress Bar')\n });\n }\n\n /**\n * This function updates the play progress bar and accessibility\n * attributes to whatever is passed in.\n *\n * @param {Event} [event]\n * The `timeupdate` or `ended` event that caused this to run.\n *\n * @listens Player#timeupdate\n *\n * @return {number}\n * The current percent at a number from 0-1\n */\n update(event) {\n // ignore updates while the tab is hidden\n if (document.visibilityState === 'hidden') {\n return;\n }\n const percent = super.update();\n this.requestNamedAnimationFrame('SeekBar#update', () => {\n const currentTime = this.player_.ended() ? this.player_.duration() : this.getCurrentTime_();\n const liveTracker = this.player_.liveTracker;\n let duration = this.player_.duration();\n if (liveTracker && liveTracker.isLive()) {\n duration = this.player_.liveTracker.liveCurrentTime();\n }\n if (this.percent_ !== percent) {\n // machine readable value of progress bar (percentage complete)\n this.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));\n this.percent_ = percent;\n }\n if (this.currentTime_ !== currentTime || this.duration_ !== duration) {\n // human readable value of progress bar (time complete)\n this.el_.setAttribute('aria-valuetext', this.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));\n this.currentTime_ = currentTime;\n this.duration_ = duration;\n }\n\n // update the progress bar time tooltip with the current time\n if (this.bar) {\n this.bar.update(getBoundingClientRect(this.el()), this.getProgress());\n }\n });\n return percent;\n }\n\n /**\n * Prevent liveThreshold from causing seeks to seem like they\n * are not happening from a user perspective.\n *\n * @param {number} ct\n * current time to seek to\n */\n userSeek_(ct) {\n if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {\n this.player_.liveTracker.nextSeekedFromUser();\n }\n this.player_.currentTime(ct);\n }\n\n /**\n * Get the value of current time but allows for smooth scrubbing,\n * when player can't keep up.\n *\n * @return {number}\n * The current time value to display\n *\n * @private\n */\n getCurrentTime_() {\n return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n }\n\n /**\n * Get the percentage of media played so far.\n *\n * @return {number}\n * The percentage of media played so far (0 to 1).\n */\n getPercent() {\n const currentTime = this.getCurrentTime_();\n let percent;\n const liveTracker = this.player_.liveTracker;\n if (liveTracker && liveTracker.isLive()) {\n percent = (currentTime - liveTracker.seekableStart()) / liveTracker.liveWindow();\n\n // prevent the percent from changing at the live edge\n if (liveTracker.atLiveEdge()) {\n percent = 1;\n }\n } else {\n percent = currentTime / this.player_.duration();\n }\n return percent;\n }\n\n /**\n * Handle mouse down on seek bar\n *\n * @param {MouseEvent} event\n * The `mousedown` event that caused this to run.\n *\n * @listens mousedown\n */\n handleMouseDown(event) {\n if (!isSingleLeftClick(event)) {\n return;\n }\n\n // Stop event propagation to prevent double fire in progress-control.js\n event.stopPropagation();\n this.videoWasPlaying = !this.player_.paused();\n this.player_.pause();\n super.handleMouseDown(event);\n }\n\n /**\n * Handle mouse move on seek bar\n *\n * @param {MouseEvent} event\n * The `mousemove` event that caused this to run.\n * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false\n *\n * @listens mousemove\n */\n handleMouseMove(event, mouseDown = false) {\n if (!isSingleLeftClick(event)) {\n return;\n }\n if (!mouseDown && !this.player_.scrubbing()) {\n this.player_.scrubbing(true);\n }\n let newTime;\n const distance = this.calculateDistance(event);\n const liveTracker = this.player_.liveTracker;\n if (!liveTracker || !liveTracker.isLive()) {\n newTime = distance * this.player_.duration();\n\n // Don't let video end while scrubbing.\n if (newTime === this.player_.duration()) {\n newTime = newTime - 0.1;\n }\n } else {\n if (distance >= 0.99) {\n liveTracker.seekToLiveEdge();\n return;\n }\n const seekableStart = liveTracker.seekableStart();\n const seekableEnd = liveTracker.liveCurrentTime();\n newTime = seekableStart + distance * liveTracker.liveWindow();\n\n // Don't let video end while scrubbing.\n if (newTime >= seekableEnd) {\n newTime = seekableEnd;\n }\n\n // Compensate for precision differences so that currentTime is not less\n // than seekable start\n if (newTime <= seekableStart) {\n newTime = seekableStart + 0.1;\n }\n\n // On android seekableEnd can be Infinity sometimes,\n // this will cause newTime to be Infinity, which is\n // not a valid currentTime.\n if (newTime === Infinity) {\n return;\n }\n }\n\n // Set new time (tell player to seek to new time)\n this.userSeek_(newTime);\n }\n enable() {\n super.enable();\n const mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n if (!mouseTimeDisplay) {\n return;\n }\n mouseTimeDisplay.show();\n }\n disable() {\n super.disable();\n const mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n if (!mouseTimeDisplay) {\n return;\n }\n mouseTimeDisplay.hide();\n }\n\n /**\n * Handle mouse up on seek bar\n *\n * @param {MouseEvent} event\n * The `mouseup` event that caused this to run.\n *\n * @listens mouseup\n */\n handleMouseUp(event) {\n super.handleMouseUp(event);\n\n // Stop event propagation to prevent double fire in progress-control.js\n if (event) {\n event.stopPropagation();\n }\n this.player_.scrubbing(false);\n\n /**\n * Trigger timeupdate because we're done seeking and the time has changed.\n * This is particularly useful for if the player is paused to time the time displays.\n *\n * @event Tech#timeupdate\n * @type {Event}\n */\n this.player_.trigger({\n type: 'timeupdate',\n target: this,\n manuallyTriggered: true\n });\n if (this.videoWasPlaying) {\n silencePromise(this.player_.play());\n } else {\n // We're done seeking and the time has changed.\n // If the player is paused, make sure we display the correct time on the seek bar.\n this.update_();\n }\n }\n\n /**\n * Move more quickly fast forward for keyboard-only users\n */\n stepForward() {\n this.userSeek_(this.player_.currentTime() + STEP_SECONDS);\n }\n\n /**\n * Move more quickly rewind for keyboard-only users\n */\n stepBack() {\n this.userSeek_(this.player_.currentTime() - STEP_SECONDS);\n }\n\n /**\n * Toggles the playback state of the player\n * This gets called when enter or space is used on the seekbar\n *\n * @param {KeyboardEvent} event\n * The `keydown` event that caused this function to be called\n *\n */\n handleAction(event) {\n if (this.player_.paused()) {\n this.player_.play();\n } else {\n this.player_.pause();\n }\n }\n\n /**\n * Called when this SeekBar has focus and a key gets pressed down.\n * Supports the following keys:\n *\n * Space or Enter key fire a click event\n * Home key moves to start of the timeline\n * End key moves to end of the timeline\n * Digit \"0\" through \"9\" keys move to 0%, 10% ... 80%, 90% of the timeline\n * PageDown key moves back a larger step than ArrowDown\n * PageUp key moves forward a large step\n *\n * @param {KeyboardEvent} event\n * The `keydown` event that caused this function to be called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n const liveTracker = this.player_.liveTracker;\n if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n event.preventDefault();\n event.stopPropagation();\n this.handleAction(event);\n } else if (keycode.isEventKey(event, 'Home')) {\n event.preventDefault();\n event.stopPropagation();\n this.userSeek_(0);\n } else if (keycode.isEventKey(event, 'End')) {\n event.preventDefault();\n event.stopPropagation();\n if (liveTracker && liveTracker.isLive()) {\n this.userSeek_(liveTracker.liveCurrentTime());\n } else {\n this.userSeek_(this.player_.duration());\n }\n } else if (/^[0-9]$/.test(keycode(event))) {\n event.preventDefault();\n event.stopPropagation();\n const gotoFraction = (keycode.codes[keycode(event)] - keycode.codes['0']) * 10.0 / 100.0;\n if (liveTracker && liveTracker.isLive()) {\n this.userSeek_(liveTracker.seekableStart() + liveTracker.liveWindow() * gotoFraction);\n } else {\n this.userSeek_(this.player_.duration() * gotoFraction);\n }\n } else if (keycode.isEventKey(event, 'PgDn')) {\n event.preventDefault();\n event.stopPropagation();\n this.userSeek_(this.player_.currentTime() - STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n } else if (keycode.isEventKey(event, 'PgUp')) {\n event.preventDefault();\n event.stopPropagation();\n this.userSeek_(this.player_.currentTime() + STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n } else {\n // Pass keydown handling up for unsupported keys\n super.handleKeyDown(event);\n }\n }\n dispose() {\n this.disableInterval_();\n this.off(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n if (this.player_.liveTracker) {\n this.off(this.player_.liveTracker, 'liveedgechange', this.update);\n }\n this.off(this.player_, ['playing'], this.enableIntervalHandler_);\n this.off(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_);\n\n // we don't need to update the play progress if the document is hidden,\n // also, this causes the CPU to spike and eventually crash the page on IE11.\n if ('hidden' in document && 'visibilityState' in document) {\n this.off(document, 'visibilitychange', this.toggleVisibility_);\n }\n super.dispose();\n }\n }\n\n /**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n SeekBar.prototype.options_ = {\n children: ['loadProgressBar', 'playProgressBar'],\n barName: 'playProgressBar'\n };\n\n // MouseTimeDisplay tooltips should not be added to a player on mobile devices\n if (!IS_IOS && !IS_ANDROID) {\n SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n }\n Component$1.registerComponent('SeekBar', SeekBar);\n\n /**\n * @file progress-control.js\n */\n\n /**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n class ProgressControl extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.handleMouseMove = throttle(bind_(this, this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n this.throttledHandleMouseSeek = throttle(bind_(this, this.handleMouseSeek), UPDATE_REFRESH_INTERVAL);\n this.handleMouseUpHandler_ = e => this.handleMouseUp(e);\n this.handleMouseDownHandler_ = e => this.handleMouseDown(e);\n this.enable();\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-progress-control vjs-control'\n });\n }\n\n /**\n * When the mouse moves over the `ProgressControl`, the pointer position\n * gets passed down to the `MouseTimeDisplay` component.\n *\n * @param {Event} event\n * The `mousemove` event that caused this function to run.\n *\n * @listen mousemove\n */\n handleMouseMove(event) {\n const seekBar = this.getChild('seekBar');\n if (!seekBar) {\n return;\n }\n const playProgressBar = seekBar.getChild('playProgressBar');\n const mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n if (!playProgressBar && !mouseTimeDisplay) {\n return;\n }\n const seekBarEl = seekBar.el();\n const seekBarRect = findPosition(seekBarEl);\n let seekBarPoint = getPointerPosition(seekBarEl, event).x;\n\n // The default skin has a gap on either side of the `SeekBar`. This means\n // that it's possible to trigger this behavior outside the boundaries of\n // the `SeekBar`. This ensures we stay within it at all times.\n seekBarPoint = clamp(seekBarPoint, 0, 1);\n if (mouseTimeDisplay) {\n mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n }\n if (playProgressBar) {\n playProgressBar.update(seekBarRect, seekBar.getProgress());\n }\n }\n\n /**\n * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n *\n * @method ProgressControl#throttledHandleMouseSeek\n * @param {Event} event\n * The `mousemove` event that caused this function to run.\n *\n * @listen mousemove\n * @listen touchmove\n */\n\n /**\n * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n *\n * @param {Event} event\n * `mousedown` or `touchstart` event that triggered this function\n *\n * @listens mousemove\n * @listens touchmove\n */\n handleMouseSeek(event) {\n const seekBar = this.getChild('seekBar');\n if (seekBar) {\n seekBar.handleMouseMove(event);\n }\n }\n\n /**\n * Are controls are currently enabled for this progress control.\n *\n * @return {boolean}\n * true if controls are enabled, false otherwise\n */\n enabled() {\n return this.enabled_;\n }\n\n /**\n * Disable all controls on the progress control and its children\n */\n disable() {\n this.children().forEach(child => child.disable && child.disable());\n if (!this.enabled()) {\n return;\n }\n this.off(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n this.off(this.el_, 'mousemove', this.handleMouseMove);\n this.removeListenersAddedOnMousedownAndTouchstart();\n this.addClass('disabled');\n this.enabled_ = false;\n\n // Restore normal playback state if controls are disabled while scrubbing\n if (this.player_.scrubbing()) {\n const seekBar = this.getChild('seekBar');\n this.player_.scrubbing(false);\n if (seekBar.videoWasPlaying) {\n silencePromise(this.player_.play());\n }\n }\n }\n\n /**\n * Enable all controls on the progress control and its children\n */\n enable() {\n this.children().forEach(child => child.enable && child.enable());\n if (this.enabled()) {\n return;\n }\n this.on(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n this.on(this.el_, 'mousemove', this.handleMouseMove);\n this.removeClass('disabled');\n this.enabled_ = true;\n }\n\n /**\n * Cleanup listeners after the user finishes interacting with the progress controls\n */\n removeListenersAddedOnMousedownAndTouchstart() {\n const doc = this.el_.ownerDocument;\n this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n this.off(doc, 'touchend', this.handleMouseUpHandler_);\n }\n\n /**\n * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n *\n * @param {Event} event\n * `mousedown` or `touchstart` event that triggered this function\n *\n * @listens mousedown\n * @listens touchstart\n */\n handleMouseDown(event) {\n const doc = this.el_.ownerDocument;\n const seekBar = this.getChild('seekBar');\n if (seekBar) {\n seekBar.handleMouseDown(event);\n }\n this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n this.on(doc, 'touchend', this.handleMouseUpHandler_);\n }\n\n /**\n * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n *\n * @param {Event} event\n * `mouseup` or `touchend` event that triggered this function.\n *\n * @listens touchend\n * @listens mouseup\n */\n handleMouseUp(event) {\n const seekBar = this.getChild('seekBar');\n if (seekBar) {\n seekBar.handleMouseUp(event);\n }\n this.removeListenersAddedOnMousedownAndTouchstart();\n }\n }\n\n /**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n ProgressControl.prototype.options_ = {\n children: ['seekBar']\n };\n Component$1.registerComponent('ProgressControl', ProgressControl);\n\n /**\n * @file picture-in-picture-toggle.js\n */\n\n /**\n * Toggle Picture-in-Picture mode\n *\n * @extends Button\n */\n class PictureInPictureToggle extends Button {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @listens Player#enterpictureinpicture\n * @listens Player#leavepictureinpicture\n */\n constructor(player, options) {\n super(player, options);\n this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], e => this.handlePictureInPictureChange(e));\n this.on(player, ['disablepictureinpicturechanged', 'loadedmetadata'], e => this.handlePictureInPictureEnabledChange(e));\n this.on(player, ['loadedmetadata', 'audioonlymodechange', 'audiopostermodechange'], () => {\n // This audio detection will not detect HLS or DASH audio-only streams because there was no reliable way to detect them at the time\n const isSourceAudio = player.currentType().substring(0, 5) === 'audio';\n if (isSourceAudio || player.audioPosterMode() || player.audioOnlyMode()) {\n if (player.isInPictureInPicture()) {\n player.exitPictureInPicture();\n }\n this.hide();\n } else {\n this.show();\n }\n });\n\n // TODO: Deactivate button on player emptied event.\n this.disable();\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-picture-in-picture-control ${super.buildCSSClass()}`;\n }\n\n /**\n * Enables or disables button based on availability of a Picture-In-Picture mode.\n *\n * Enabled if\n * - `player.options().enableDocumentPictureInPicture` is true and\n * window.documentPictureInPicture is available; or\n * - `player.disablePictureInPicture()` is false and\n * element.requestPictureInPicture is available\n */\n handlePictureInPictureEnabledChange() {\n if (document.pictureInPictureEnabled && this.player_.disablePictureInPicture() === false || this.player_.options_.enableDocumentPictureInPicture && 'documentPictureInPicture' in window) {\n this.enable();\n } else {\n this.disable();\n }\n }\n\n /**\n * Handles enterpictureinpicture and leavepictureinpicture on the player and change control text accordingly.\n *\n * @param {Event} [event]\n * The {@link Player#enterpictureinpicture} or {@link Player#leavepictureinpicture} event that caused this function to be\n * called.\n *\n * @listens Player#enterpictureinpicture\n * @listens Player#leavepictureinpicture\n */\n handlePictureInPictureChange(event) {\n if (this.player_.isInPictureInPicture()) {\n this.controlText('Exit Picture-in-Picture');\n } else {\n this.controlText('Picture-in-Picture');\n }\n this.handlePictureInPictureEnabledChange();\n }\n\n /**\n * This gets called when an `PictureInPictureToggle` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n if (!this.player_.isInPictureInPicture()) {\n this.player_.requestPictureInPicture();\n } else {\n this.player_.exitPictureInPicture();\n }\n }\n }\n\n /**\n * The text that should display over the `PictureInPictureToggle`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n PictureInPictureToggle.prototype.controlText_ = 'Picture-in-Picture';\n Component$1.registerComponent('PictureInPictureToggle', PictureInPictureToggle);\n\n /**\n * @file fullscreen-toggle.js\n */\n\n /**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n class FullscreenToggle extends Button {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.on(player, 'fullscreenchange', e => this.handleFullscreenChange(e));\n if (document[player.fsApi_.fullscreenEnabled] === false) {\n this.disable();\n }\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-fullscreen-control ${super.buildCSSClass()}`;\n }\n\n /**\n * Handles fullscreenchange on the player and change control text accordingly.\n *\n * @param {Event} [event]\n * The {@link Player#fullscreenchange} event that caused this function to be\n * called.\n *\n * @listens Player#fullscreenchange\n */\n handleFullscreenChange(event) {\n if (this.player_.isFullscreen()) {\n this.controlText('Exit Fullscreen');\n } else {\n this.controlText('Fullscreen');\n }\n }\n\n /**\n * This gets called when an `FullscreenToggle` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n if (!this.player_.isFullscreen()) {\n this.player_.requestFullscreen();\n } else {\n this.player_.exitFullscreen();\n }\n }\n }\n\n /**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n FullscreenToggle.prototype.controlText_ = 'Fullscreen';\n Component$1.registerComponent('FullscreenToggle', FullscreenToggle);\n\n /**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed using the `vjs-hidden` class.\n *\n * @param { import('../../component').default } self\n * The component that should be hidden if volume is unsupported\n *\n * @param { import('../../player').default } player\n * A reference to the player\n *\n * @private\n */\n const checkVolumeSupport = function (self, player) {\n // hide volume controls when they're not supported by the current tech\n if (player.tech_ && !player.tech_.featuresVolumeControl) {\n self.addClass('vjs-hidden');\n }\n self.on(player, 'loadstart', function () {\n if (!player.tech_.featuresVolumeControl) {\n self.addClass('vjs-hidden');\n } else {\n self.removeClass('vjs-hidden');\n }\n });\n };\n\n /**\n * @file volume-level.js\n */\n\n /**\n * Shows volume level\n *\n * @extends Component\n */\n class VolumeLevel extends Component$1 {\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl('div', {\n className: 'vjs-volume-level'\n });\n el.appendChild(super.createEl('span', {\n className: 'vjs-control-text'\n }));\n return el;\n }\n }\n Component$1.registerComponent('VolumeLevel', VolumeLevel);\n\n /**\n * @file volume-level-tooltip.js\n */\n\n /**\n * Volume level tooltips display a volume above or side by side the volume bar.\n *\n * @extends Component\n */\n class VolumeLevelTooltip extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The {@link Player} that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);\n }\n\n /**\n * Create the volume tooltip DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-volume-tooltip'\n }, {\n 'aria-hidden': 'true'\n });\n }\n\n /**\n * Updates the position of the tooltip relative to the `VolumeBar` and\n * its content text.\n *\n * @param {Object} rangeBarRect\n * The `ClientRect` for the {@link VolumeBar} element.\n *\n * @param {number} rangeBarPoint\n * A number from 0 to 1, representing a horizontal/vertical reference point\n * from the left edge of the {@link VolumeBar}\n *\n * @param {boolean} vertical\n * Referees to the Volume control position\n * in the control bar{@link VolumeControl}\n *\n */\n update(rangeBarRect, rangeBarPoint, vertical, content) {\n if (!vertical) {\n const tooltipRect = getBoundingClientRect(this.el_);\n const playerRect = getBoundingClientRect(this.player_.el());\n const volumeBarPointPx = rangeBarRect.width * rangeBarPoint;\n if (!playerRect || !tooltipRect) {\n return;\n }\n const spaceLeftOfPoint = rangeBarRect.left - playerRect.left + volumeBarPointPx;\n const spaceRightOfPoint = rangeBarRect.width - volumeBarPointPx + (playerRect.right - rangeBarRect.right);\n let pullTooltipBy = tooltipRect.width / 2;\n if (spaceLeftOfPoint < pullTooltipBy) {\n pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n } else if (spaceRightOfPoint < pullTooltipBy) {\n pullTooltipBy = spaceRightOfPoint;\n }\n if (pullTooltipBy < 0) {\n pullTooltipBy = 0;\n } else if (pullTooltipBy > tooltipRect.width) {\n pullTooltipBy = tooltipRect.width;\n }\n this.el_.style.right = `-${pullTooltipBy}px`;\n }\n this.write(`${content}%`);\n }\n\n /**\n * Write the volume to the tooltip DOM element.\n *\n * @param {string} content\n * The formatted volume for the tooltip.\n */\n write(content) {\n textContent(this.el_, content);\n }\n\n /**\n * Updates the position of the volume tooltip relative to the `VolumeBar`.\n *\n * @param {Object} rangeBarRect\n * The `ClientRect` for the {@link VolumeBar} element.\n *\n * @param {number} rangeBarPoint\n * A number from 0 to 1, representing a horizontal/vertical reference point\n * from the left edge of the {@link VolumeBar}\n *\n * @param {boolean} vertical\n * Referees to the Volume control position\n * in the control bar{@link VolumeControl}\n *\n * @param {number} volume\n * The volume level to update the tooltip to\n *\n * @param {Function} cb\n * A function that will be called during the request animation frame\n * for tooltips that need to do additional animations from the default\n */\n updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, cb) {\n this.requestNamedAnimationFrame('VolumeLevelTooltip#updateVolume', () => {\n this.update(rangeBarRect, rangeBarPoint, vertical, volume.toFixed(0));\n if (cb) {\n cb();\n }\n });\n }\n }\n Component$1.registerComponent('VolumeLevelTooltip', VolumeLevelTooltip);\n\n /**\n * @file mouse-volume-level-display.js\n */\n\n /**\n * The {@link MouseVolumeLevelDisplay} component tracks mouse movement over the\n * {@link VolumeControl}. It displays an indicator and a {@link VolumeLevelTooltip}\n * indicating the volume level which is represented by a given point in the\n * {@link VolumeBar}.\n *\n * @extends Component\n */\n class MouseVolumeLevelDisplay extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The {@link Player} that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.update = throttle(bind_(this, this.update), UPDATE_REFRESH_INTERVAL);\n }\n\n /**\n * Create the DOM element for this class.\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-mouse-display'\n });\n }\n\n /**\n * Enquires updates to its own DOM as well as the DOM of its\n * {@link VolumeLevelTooltip} child.\n *\n * @param {Object} rangeBarRect\n * The `ClientRect` for the {@link VolumeBar} element.\n *\n * @param {number} rangeBarPoint\n * A number from 0 to 1, representing a horizontal/vertical reference point\n * from the left edge of the {@link VolumeBar}\n *\n * @param {boolean} vertical\n * Referees to the Volume control position\n * in the control bar{@link VolumeControl}\n *\n */\n update(rangeBarRect, rangeBarPoint, vertical) {\n const volume = 100 * rangeBarPoint;\n this.getChild('volumeLevelTooltip').updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, () => {\n if (vertical) {\n this.el_.style.bottom = `${rangeBarRect.height * rangeBarPoint}px`;\n } else {\n this.el_.style.left = `${rangeBarRect.width * rangeBarPoint}px`;\n }\n });\n }\n }\n\n /**\n * Default options for `MouseVolumeLevelDisplay`\n *\n * @type {Object}\n * @private\n */\n MouseVolumeLevelDisplay.prototype.options_ = {\n children: ['volumeLevelTooltip']\n };\n Component$1.registerComponent('MouseVolumeLevelDisplay', MouseVolumeLevelDisplay);\n\n /**\n * @file volume-bar.js\n */\n\n /**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n class VolumeBar extends Slider {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.on('slideractive', e => this.updateLastVolume_(e));\n this.on(player, 'volumechange', e => this.updateARIAAttributes(e));\n player.ready(() => this.updateARIAAttributes());\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-volume-bar vjs-slider-bar'\n }, {\n 'aria-label': this.localize('Volume Level'),\n 'aria-live': 'polite'\n });\n }\n\n /**\n * Handle mouse down on volume bar\n *\n * @param {Event} event\n * The `mousedown` event that caused this to run.\n *\n * @listens mousedown\n */\n handleMouseDown(event) {\n if (!isSingleLeftClick(event)) {\n return;\n }\n super.handleMouseDown(event);\n }\n\n /**\n * Handle movement events on the {@link VolumeMenuButton}.\n *\n * @param {Event} event\n * The event that caused this function to run.\n *\n * @listens mousemove\n */\n handleMouseMove(event) {\n const mouseVolumeLevelDisplay = this.getChild('mouseVolumeLevelDisplay');\n if (mouseVolumeLevelDisplay) {\n const volumeBarEl = this.el();\n const volumeBarRect = getBoundingClientRect(volumeBarEl);\n const vertical = this.vertical();\n let volumeBarPoint = getPointerPosition(volumeBarEl, event);\n volumeBarPoint = vertical ? volumeBarPoint.y : volumeBarPoint.x;\n // The default skin has a gap on either side of the `VolumeBar`. This means\n // that it's possible to trigger this behavior outside the boundaries of\n // the `VolumeBar`. This ensures we stay within it at all times.\n volumeBarPoint = clamp(volumeBarPoint, 0, 1);\n mouseVolumeLevelDisplay.update(volumeBarRect, volumeBarPoint, vertical);\n }\n if (!isSingleLeftClick(event)) {\n return;\n }\n this.checkMuted();\n this.player_.volume(this.calculateDistance(event));\n }\n\n /**\n * If the player is muted unmute it.\n */\n checkMuted() {\n if (this.player_.muted()) {\n this.player_.muted(false);\n }\n }\n\n /**\n * Get percent of volume level\n *\n * @return {number}\n * Volume level percent as a decimal number.\n */\n getPercent() {\n if (this.player_.muted()) {\n return 0;\n }\n return this.player_.volume();\n }\n\n /**\n * Increase volume level for keyboard users\n */\n stepForward() {\n this.checkMuted();\n this.player_.volume(this.player_.volume() + 0.1);\n }\n\n /**\n * Decrease volume level for keyboard users\n */\n stepBack() {\n this.checkMuted();\n this.player_.volume(this.player_.volume() - 0.1);\n }\n\n /**\n * Update ARIA accessibility attributes\n *\n * @param {Event} [event]\n * The `volumechange` event that caused this function to run.\n *\n * @listens Player#volumechange\n */\n updateARIAAttributes(event) {\n const ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n this.el_.setAttribute('aria-valuenow', ariaValue);\n this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n }\n\n /**\n * Returns the current value of the player volume as a percentage\n *\n * @private\n */\n volumeAsPercentage_() {\n return Math.round(this.player_.volume() * 100);\n }\n\n /**\n * When user starts dragging the VolumeBar, store the volume and listen for\n * the end of the drag. When the drag ends, if the volume was set to zero,\n * set lastVolume to the stored volume.\n *\n * @listens slideractive\n * @private\n */\n updateLastVolume_() {\n const volumeBeforeDrag = this.player_.volume();\n this.one('sliderinactive', () => {\n if (this.player_.volume() === 0) {\n this.player_.lastVolume_(volumeBeforeDrag);\n }\n });\n }\n }\n\n /**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n VolumeBar.prototype.options_ = {\n children: ['volumeLevel'],\n barName: 'volumeLevel'\n };\n\n // MouseVolumeLevelDisplay tooltip should not be added to a player on mobile devices\n if (!IS_IOS && !IS_ANDROID) {\n VolumeBar.prototype.options_.children.splice(0, 0, 'mouseVolumeLevelDisplay');\n }\n\n /**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\n VolumeBar.prototype.playerEvent = 'volumechange';\n Component$1.registerComponent('VolumeBar', VolumeBar);\n\n /**\n * @file volume-control.js\n */\n\n /**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n class VolumeControl extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n */\n constructor(player, options = {}) {\n options.vertical = options.vertical || false;\n\n // Pass the vertical option down to the VolumeBar if\n // the VolumeBar is turned on.\n if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n options.volumeBar = options.volumeBar || {};\n options.volumeBar.vertical = options.vertical;\n }\n super(player, options);\n\n // hide this control if volume support is missing\n checkVolumeSupport(this, player);\n this.throttledHandleMouseMove = throttle(bind_(this, this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n this.handleMouseUpHandler_ = e => this.handleMouseUp(e);\n this.on('mousedown', e => this.handleMouseDown(e));\n this.on('touchstart', e => this.handleMouseDown(e));\n this.on('mousemove', e => this.handleMouseMove(e));\n\n // while the slider is active (the mouse has been pressed down and\n // is dragging) or in focus we do not want to hide the VolumeBar\n this.on(this.volumeBar, ['focus', 'slideractive'], () => {\n this.volumeBar.addClass('vjs-slider-active');\n this.addClass('vjs-slider-active');\n this.trigger('slideractive');\n });\n this.on(this.volumeBar, ['blur', 'sliderinactive'], () => {\n this.volumeBar.removeClass('vjs-slider-active');\n this.removeClass('vjs-slider-active');\n this.trigger('sliderinactive');\n });\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n let orientationClass = 'vjs-volume-horizontal';\n if (this.options_.vertical) {\n orientationClass = 'vjs-volume-vertical';\n }\n return super.createEl('div', {\n className: `vjs-volume-control vjs-control ${orientationClass}`\n });\n }\n\n /**\n * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n *\n * @param {Event} event\n * `mousedown` or `touchstart` event that triggered this function\n *\n * @listens mousedown\n * @listens touchstart\n */\n handleMouseDown(event) {\n const doc = this.el_.ownerDocument;\n this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n this.on(doc, 'touchend', this.handleMouseUpHandler_);\n }\n\n /**\n * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n *\n * @param {Event} event\n * `mouseup` or `touchend` event that triggered this function.\n *\n * @listens touchend\n * @listens mouseup\n */\n handleMouseUp(event) {\n const doc = this.el_.ownerDocument;\n this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n this.off(doc, 'touchend', this.handleMouseUpHandler_);\n }\n\n /**\n * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n *\n * @param {Event} event\n * `mousedown` or `touchstart` event that triggered this function\n *\n * @listens mousedown\n * @listens touchstart\n */\n handleMouseMove(event) {\n this.volumeBar.handleMouseMove(event);\n }\n }\n\n /**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n VolumeControl.prototype.options_ = {\n children: ['volumeBar']\n };\n Component$1.registerComponent('VolumeControl', VolumeControl);\n\n /**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param { import('../../component').default } self\n * A reference to the mute toggle button\n *\n * @param { import('../../player').default } player\n * A reference to the player\n *\n * @private\n */\n const checkMuteSupport = function (self, player) {\n // hide mute toggle button if it's not supported by the current tech\n if (player.tech_ && !player.tech_.featuresMuteControl) {\n self.addClass('vjs-hidden');\n }\n self.on(player, 'loadstart', function () {\n if (!player.tech_.featuresMuteControl) {\n self.addClass('vjs-hidden');\n } else {\n self.removeClass('vjs-hidden');\n }\n });\n };\n\n /**\n * @file mute-toggle.js\n */\n\n /**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n class MuteToggle extends Button {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n\n // hide this control if volume support is missing\n checkMuteSupport(this, player);\n this.on(player, ['loadstart', 'volumechange'], e => this.update(e));\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-mute-control ${super.buildCSSClass()}`;\n }\n\n /**\n * This gets called when an `MuteToggle` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n const vol = this.player_.volume();\n const lastVolume = this.player_.lastVolume_();\n if (vol === 0) {\n const volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n this.player_.volume(volumeToSet);\n this.player_.muted(false);\n } else {\n this.player_.muted(this.player_.muted() ? false : true);\n }\n }\n\n /**\n * Update the `MuteToggle` button based on the state of `volume` and `muted`\n * on the player.\n *\n * @param {Event} [event]\n * The {@link Player#loadstart} event if this function was called\n * through an event.\n *\n * @listens Player#loadstart\n * @listens Player#volumechange\n */\n update(event) {\n this.updateIcon_();\n this.updateControlText_();\n }\n\n /**\n * Update the appearance of the `MuteToggle` icon.\n *\n * Possible states (given `level` variable below):\n * - 0: crossed out\n * - 1: zero bars of volume\n * - 2: one bar of volume\n * - 3: two bars of volume\n *\n * @private\n */\n updateIcon_() {\n const vol = this.player_.volume();\n let level = 3;\n\n // in iOS when a player is loaded with muted attribute\n // and volume is changed with a native mute button\n // we want to make sure muted state is updated\n if (IS_IOS && this.player_.tech_ && this.player_.tech_.el_) {\n this.player_.muted(this.player_.tech_.el_.muted);\n }\n if (vol === 0 || this.player_.muted()) {\n level = 0;\n } else if (vol < 0.33) {\n level = 1;\n } else if (vol < 0.67) {\n level = 2;\n }\n removeClass(this.el_, [0, 1, 2, 3].reduce((str, i) => str + `${i ? ' ' : ''}vjs-vol-${i}`, ''));\n addClass(this.el_, `vjs-vol-${level}`);\n }\n\n /**\n * If `muted` has changed on the player, update the control text\n * (`title` attribute on `vjs-mute-control` element and content of\n * `vjs-control-text` element).\n *\n * @private\n */\n updateControlText_() {\n const soundOff = this.player_.muted() || this.player_.volume() === 0;\n const text = soundOff ? 'Unmute' : 'Mute';\n if (this.controlText() !== text) {\n this.controlText(text);\n }\n }\n }\n\n /**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n MuteToggle.prototype.controlText_ = 'Mute';\n Component$1.registerComponent('MuteToggle', MuteToggle);\n\n /**\n * @file volume-control.js\n */\n\n /**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n class VolumePanel extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n */\n constructor(player, options = {}) {\n if (typeof options.inline !== 'undefined') {\n options.inline = options.inline;\n } else {\n options.inline = true;\n }\n\n // pass the inline option down to the VolumeControl as vertical if\n // the VolumeControl is on.\n if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n options.volumeControl = options.volumeControl || {};\n options.volumeControl.vertical = !options.inline;\n }\n super(player, options);\n\n // this handler is used by mouse handler methods below\n this.handleKeyPressHandler_ = e => this.handleKeyPress(e);\n this.on(player, ['loadstart'], e => this.volumePanelState_(e));\n this.on(this.muteToggle, 'keyup', e => this.handleKeyPress(e));\n this.on(this.volumeControl, 'keyup', e => this.handleVolumeControlKeyUp(e));\n this.on('keydown', e => this.handleKeyPress(e));\n this.on('mouseover', e => this.handleMouseOver(e));\n this.on('mouseout', e => this.handleMouseOut(e));\n\n // while the slider is active (the mouse has been pressed down and\n // is dragging) we do not want to hide the VolumeBar\n this.on(this.volumeControl, ['slideractive'], this.sliderActive_);\n this.on(this.volumeControl, ['sliderinactive'], this.sliderInactive_);\n }\n\n /**\n * Add vjs-slider-active class to the VolumePanel\n *\n * @listens VolumeControl#slideractive\n * @private\n */\n sliderActive_() {\n this.addClass('vjs-slider-active');\n }\n\n /**\n * Removes vjs-slider-active class to the VolumePanel\n *\n * @listens VolumeControl#sliderinactive\n * @private\n */\n sliderInactive_() {\n this.removeClass('vjs-slider-active');\n }\n\n /**\n * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n * depending on MuteToggle and VolumeControl state\n *\n * @listens Player#loadstart\n * @private\n */\n volumePanelState_() {\n // hide volume panel if neither volume control or mute toggle\n // are displayed\n if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n this.addClass('vjs-hidden');\n }\n\n // if only mute toggle is visible we don't want\n // volume panel expanding when hovered or active\n if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n this.addClass('vjs-mute-toggle-only');\n }\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n let orientationClass = 'vjs-volume-panel-horizontal';\n if (!this.options_.inline) {\n orientationClass = 'vjs-volume-panel-vertical';\n }\n return super.createEl('div', {\n className: `vjs-volume-panel vjs-control ${orientationClass}`\n });\n }\n\n /**\n * Dispose of the `volume-panel` and all child components.\n */\n dispose() {\n this.handleMouseOut();\n super.dispose();\n }\n\n /**\n * Handles `keyup` events on the `VolumeControl`, looking for ESC, which closes\n * the volume panel and sets focus on `MuteToggle`.\n *\n * @param {Event} event\n * The `keyup` event that caused this function to be called.\n *\n * @listens keyup\n */\n handleVolumeControlKeyUp(event) {\n if (keycode.isEventKey(event, 'Esc')) {\n this.muteToggle.focus();\n }\n }\n\n /**\n * This gets called when a `VolumePanel` gains hover via a `mouseover` event.\n * Turns on listening for `mouseover` event. When they happen it\n * calls `this.handleMouseOver`.\n *\n * @param {Event} event\n * The `mouseover` event that caused this function to be called.\n *\n * @listens mouseover\n */\n handleMouseOver(event) {\n this.addClass('vjs-hover');\n on(document, 'keyup', this.handleKeyPressHandler_);\n }\n\n /**\n * This gets called when a `VolumePanel` gains hover via a `mouseout` event.\n * Turns on listening for `mouseout` event. When they happen it\n * calls `this.handleMouseOut`.\n *\n * @param {Event} event\n * The `mouseout` event that caused this function to be called.\n *\n * @listens mouseout\n */\n handleMouseOut(event) {\n this.removeClass('vjs-hover');\n off(document, 'keyup', this.handleKeyPressHandler_);\n }\n\n /**\n * Handles `keyup` event on the document or `keydown` event on the `VolumePanel`,\n * looking for ESC, which hides the `VolumeControl`.\n *\n * @param {Event} event\n * The keypress that triggered this event.\n *\n * @listens keydown | keyup\n */\n handleKeyPress(event) {\n if (keycode.isEventKey(event, 'Esc')) {\n this.handleMouseOut();\n }\n }\n }\n\n /**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n VolumePanel.prototype.options_ = {\n children: ['muteToggle', 'volumeControl']\n };\n Component$1.registerComponent('VolumePanel', VolumePanel);\n\n /**\n * Button to skip forward a configurable amount of time\n * through a video. Renders in the control bar.\n *\n * e.g. options: {controlBar: {skipButtons: forward: 5}}\n *\n * @extends Button\n */\n class SkipForward extends Button {\n constructor(player, options) {\n super(player, options);\n this.validOptions = [5, 10, 30];\n this.skipTime = this.getSkipForwardTime();\n if (this.skipTime && this.validOptions.includes(this.skipTime)) {\n this.controlText(this.localize('Skip forward {1} seconds', [this.skipTime]));\n this.show();\n } else {\n this.hide();\n }\n }\n getSkipForwardTime() {\n const playerOptions = this.options_.playerOptions;\n return playerOptions.controlBar && playerOptions.controlBar.skipButtons && playerOptions.controlBar.skipButtons.forward;\n }\n buildCSSClass() {\n return `vjs-skip-forward-${this.getSkipForwardTime()} ${super.buildCSSClass()}`;\n }\n\n /**\n * On click, skips forward in the duration/seekable range by a configurable amount of seconds.\n * If the time left in the duration/seekable range is less than the configured 'skip forward' time,\n * skips to end of duration/seekable range.\n *\n * Handle a click on a `SkipForward` button\n *\n * @param {EventTarget~Event} event\n * The `click` event that caused this function\n * to be called\n */\n handleClick(event) {\n const currentVideoTime = this.player_.currentTime();\n const liveTracker = this.player_.liveTracker;\n const duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : this.player_.duration();\n let newTime;\n if (currentVideoTime + this.skipTime <= duration) {\n newTime = currentVideoTime + this.skipTime;\n } else {\n newTime = duration;\n }\n this.player_.currentTime(newTime);\n }\n\n /**\n * Update control text on languagechange\n */\n handleLanguagechange() {\n this.controlText(this.localize('Skip forward {1} seconds', [this.skipTime]));\n }\n }\n Component$1.registerComponent('SkipForward', SkipForward);\n\n /**\n * Button to skip backward a configurable amount of time\n * through a video. Renders in the control bar.\n *\n * * e.g. options: {controlBar: {skipButtons: backward: 5}}\n *\n * @extends Button\n */\n class SkipBackward extends Button {\n constructor(player, options) {\n super(player, options);\n this.validOptions = [5, 10, 30];\n this.skipTime = this.getSkipBackwardTime();\n if (this.skipTime && this.validOptions.includes(this.skipTime)) {\n this.controlText(this.localize('Skip backward {1} seconds', [this.skipTime]));\n this.show();\n } else {\n this.hide();\n }\n }\n getSkipBackwardTime() {\n const playerOptions = this.options_.playerOptions;\n return playerOptions.controlBar && playerOptions.controlBar.skipButtons && playerOptions.controlBar.skipButtons.backward;\n }\n buildCSSClass() {\n return `vjs-skip-backward-${this.getSkipBackwardTime()} ${super.buildCSSClass()}`;\n }\n\n /**\n * On click, skips backward in the video by a configurable amount of seconds.\n * If the current time in the video is less than the configured 'skip backward' time,\n * skips to beginning of video or seekable range.\n *\n * Handle a click on a `SkipBackward` button\n *\n * @param {EventTarget~Event} event\n * The `click` event that caused this function\n * to be called\n */\n handleClick(event) {\n const currentVideoTime = this.player_.currentTime();\n const liveTracker = this.player_.liveTracker;\n const seekableStart = liveTracker && liveTracker.isLive() && liveTracker.seekableStart();\n let newTime;\n if (seekableStart && currentVideoTime - this.skipTime <= seekableStart) {\n newTime = seekableStart;\n } else if (currentVideoTime >= this.skipTime) {\n newTime = currentVideoTime - this.skipTime;\n } else {\n newTime = 0;\n }\n this.player_.currentTime(newTime);\n }\n\n /**\n * Update control text on languagechange\n */\n handleLanguagechange() {\n this.controlText(this.localize('Skip backward {1} seconds', [this.skipTime]));\n }\n }\n SkipBackward.prototype.controlText_ = 'Skip Backward';\n Component$1.registerComponent('SkipBackward', SkipBackward);\n\n /**\n * @file menu.js\n */\n\n /**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n class Menu extends Component$1 {\n /**\n * Create an instance of this class.\n *\n * @param { import('../player').default } player\n * the player that this component should attach to\n *\n * @param {Object} [options]\n * Object of option names and values\n *\n */\n constructor(player, options) {\n super(player, options);\n if (options) {\n this.menuButton_ = options.menuButton;\n }\n this.focusedChild_ = -1;\n this.on('keydown', e => this.handleKeyDown(e));\n\n // All the menu item instances share the same blur handler provided by the menu container.\n this.boundHandleBlur_ = e => this.handleBlur(e);\n this.boundHandleTapClick_ = e => this.handleTapClick(e);\n }\n\n /**\n * Add event listeners to the {@link MenuItem}.\n *\n * @param {Object} component\n * The instance of the `MenuItem` to add listeners to.\n *\n */\n addEventListenerForItem(component) {\n if (!(component instanceof Component$1)) {\n return;\n }\n this.on(component, 'blur', this.boundHandleBlur_);\n this.on(component, ['tap', 'click'], this.boundHandleTapClick_);\n }\n\n /**\n * Remove event listeners from the {@link MenuItem}.\n *\n * @param {Object} component\n * The instance of the `MenuItem` to remove listeners.\n *\n */\n removeEventListenerForItem(component) {\n if (!(component instanceof Component$1)) {\n return;\n }\n this.off(component, 'blur', this.boundHandleBlur_);\n this.off(component, ['tap', 'click'], this.boundHandleTapClick_);\n }\n\n /**\n * This method will be called indirectly when the component has been added\n * before the component adds to the new menu instance by `addItem`.\n * In this case, the original menu instance will remove the component\n * by calling `removeChild`.\n *\n * @param {Object} component\n * The instance of the `MenuItem`\n */\n removeChild(component) {\n if (typeof component === 'string') {\n component = this.getChild(component);\n }\n this.removeEventListenerForItem(component);\n super.removeChild(component);\n }\n\n /**\n * Add a {@link MenuItem} to the menu.\n *\n * @param {Object|string} component\n * The name or instance of the `MenuItem` to add.\n *\n */\n addItem(component) {\n const childComponent = this.addChild(component);\n if (childComponent) {\n this.addEventListenerForItem(childComponent);\n }\n }\n\n /**\n * Create the `Menu`s DOM element.\n *\n * @return {Element}\n * the element that was created\n */\n createEl() {\n const contentElType = this.options_.contentElType || 'ul';\n this.contentEl_ = createEl(contentElType, {\n className: 'vjs-menu-content'\n });\n this.contentEl_.setAttribute('role', 'menu');\n const el = super.createEl('div', {\n append: this.contentEl_,\n className: 'vjs-menu'\n });\n el.appendChild(this.contentEl_);\n\n // Prevent clicks from bubbling up. Needed for Menu Buttons,\n // where a click on the parent is significant\n on(el, 'click', function (event) {\n event.preventDefault();\n event.stopImmediatePropagation();\n });\n return el;\n }\n dispose() {\n this.contentEl_ = null;\n this.boundHandleBlur_ = null;\n this.boundHandleTapClick_ = null;\n super.dispose();\n }\n\n /**\n * Called when a `MenuItem` loses focus.\n *\n * @param {Event} event\n * The `blur` event that caused this function to be called.\n *\n * @listens blur\n */\n handleBlur(event) {\n const relatedTarget = event.relatedTarget || document.activeElement;\n\n // Close menu popup when a user clicks outside the menu\n if (!this.children().some(element => {\n return element.el() === relatedTarget;\n })) {\n const btn = this.menuButton_;\n if (btn && btn.buttonPressed_ && relatedTarget !== btn.el().firstChild) {\n btn.unpressButton();\n }\n }\n }\n\n /**\n * Called when a `MenuItem` gets clicked or tapped.\n *\n * @param {Event} event\n * The `click` or `tap` event that caused this function to be called.\n *\n * @listens click,tap\n */\n handleTapClick(event) {\n // Unpress the associated MenuButton, and move focus back to it\n if (this.menuButton_) {\n this.menuButton_.unpressButton();\n const childComponents = this.children();\n if (!Array.isArray(childComponents)) {\n return;\n }\n const foundComponent = childComponents.filter(component => component.el() === event.target)[0];\n if (!foundComponent) {\n return;\n }\n\n // don't focus menu button if item is a caption settings item\n // because focus will move elsewhere\n if (foundComponent.name() !== 'CaptionSettingsMenuItem') {\n this.menuButton_.focus();\n }\n }\n }\n\n /**\n * Handle a `keydown` event on this menu. This listener is added in the constructor.\n *\n * @param {Event} event\n * A `keydown` event that happened on the menu.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Left and Down Arrows\n if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n event.preventDefault();\n event.stopPropagation();\n this.stepForward();\n\n // Up and Right Arrows\n } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n event.preventDefault();\n event.stopPropagation();\n this.stepBack();\n }\n }\n\n /**\n * Move to next (lower) menu item for keyboard users.\n */\n stepForward() {\n let stepChild = 0;\n if (this.focusedChild_ !== undefined) {\n stepChild = this.focusedChild_ + 1;\n }\n this.focus(stepChild);\n }\n\n /**\n * Move to previous (higher) menu item for keyboard users.\n */\n stepBack() {\n let stepChild = 0;\n if (this.focusedChild_ !== undefined) {\n stepChild = this.focusedChild_ - 1;\n }\n this.focus(stepChild);\n }\n\n /**\n * Set focus on a {@link MenuItem} in the `Menu`.\n *\n * @param {Object|string} [item=0]\n * Index of child item set focus on.\n */\n focus(item = 0) {\n const children = this.children().slice();\n const haveTitle = children.length && children[0].hasClass('vjs-menu-title');\n if (haveTitle) {\n children.shift();\n }\n if (children.length > 0) {\n if (item < 0) {\n item = 0;\n } else if (item >= children.length) {\n item = children.length - 1;\n }\n this.focusedChild_ = item;\n children[item].el_.focus();\n }\n }\n }\n Component$1.registerComponent('Menu', Menu);\n\n /**\n * @file menu-button.js\n */\n\n /**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n class MenuButton extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n */\n constructor(player, options = {}) {\n super(player, options);\n this.menuButton_ = new Button(player, options);\n this.menuButton_.controlText(this.controlText_);\n this.menuButton_.el_.setAttribute('aria-haspopup', 'true');\n\n // Add buildCSSClass values to the button, not the wrapper\n const buttonClass = Button.prototype.buildCSSClass();\n this.menuButton_.el_.className = this.buildCSSClass() + ' ' + buttonClass;\n this.menuButton_.removeClass('vjs-control');\n this.addChild(this.menuButton_);\n this.update();\n this.enabled_ = true;\n const handleClick = e => this.handleClick(e);\n this.handleMenuKeyUp_ = e => this.handleMenuKeyUp(e);\n this.on(this.menuButton_, 'tap', handleClick);\n this.on(this.menuButton_, 'click', handleClick);\n this.on(this.menuButton_, 'keydown', e => this.handleKeyDown(e));\n this.on(this.menuButton_, 'mouseenter', () => {\n this.addClass('vjs-hover');\n this.menu.show();\n on(document, 'keyup', this.handleMenuKeyUp_);\n });\n this.on('mouseleave', e => this.handleMouseLeave(e));\n this.on('keydown', e => this.handleSubmenuKeyDown(e));\n }\n\n /**\n * Update the menu based on the current state of its items.\n */\n update() {\n const menu = this.createMenu();\n if (this.menu) {\n this.menu.dispose();\n this.removeChild(this.menu);\n }\n this.menu = menu;\n this.addChild(menu);\n\n /**\n * Track the state of the menu button\n *\n * @type {Boolean}\n * @private\n */\n this.buttonPressed_ = false;\n this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n if (this.items && this.items.length <= this.hideThreshold_) {\n this.hide();\n this.menu.contentEl_.removeAttribute('role');\n } else {\n this.show();\n this.menu.contentEl_.setAttribute('role', 'menu');\n }\n }\n\n /**\n * Create the menu and add all items to it.\n *\n * @return {Menu}\n * The constructed menu\n */\n createMenu() {\n const menu = new Menu(this.player_, {\n menuButton: this\n });\n\n /**\n * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n * it here because every time we run `createMenu` we need to reset the value.\n *\n * @protected\n * @type {Number}\n */\n this.hideThreshold_ = 0;\n\n // Add a title list item to the top\n if (this.options_.title) {\n const titleEl = createEl('li', {\n className: 'vjs-menu-title',\n textContent: toTitleCase$1(this.options_.title),\n tabIndex: -1\n });\n const titleComponent = new Component$1(this.player_, {\n el: titleEl\n });\n menu.addItem(titleComponent);\n }\n this.items = this.createItems();\n if (this.items) {\n // Add menu items to the menu\n for (let i = 0; i < this.items.length; i++) {\n menu.addItem(this.items[i]);\n }\n }\n return menu;\n }\n\n /**\n * Create the list of menu items. Specific to each subclass.\n *\n * @abstract\n */\n createItems() {}\n\n /**\n * Create the `MenuButtons`s DOM element.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl() {\n return super.createEl('div', {\n className: this.buildWrapperCSSClass()\n }, {});\n }\n\n /**\n * Allow sub components to stack CSS class names for the wrapper element\n *\n * @return {string}\n * The constructed wrapper DOM `className`\n */\n buildWrapperCSSClass() {\n let menuButtonClass = 'vjs-menu-button';\n\n // If the inline option is passed, we want to use different styles altogether.\n if (this.options_.inline === true) {\n menuButtonClass += '-inline';\n } else {\n menuButtonClass += '-popup';\n }\n\n // TODO: Fix the CSS so that this isn't necessary\n const buttonClass = Button.prototype.buildCSSClass();\n return `vjs-menu-button ${menuButtonClass} ${buttonClass} ${super.buildCSSClass()}`;\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n let menuButtonClass = 'vjs-menu-button';\n\n // If the inline option is passed, we want to use different styles altogether.\n if (this.options_.inline === true) {\n menuButtonClass += '-inline';\n } else {\n menuButtonClass += '-popup';\n }\n return `vjs-menu-button ${menuButtonClass} ${super.buildCSSClass()}`;\n }\n\n /**\n * Get or set the localized control text that will be used for accessibility.\n *\n * > NOTE: This will come from the internal `menuButton_` element.\n *\n * @param {string} [text]\n * Control text for element.\n *\n * @param {Element} [el=this.menuButton_.el()]\n * Element to set the title on.\n *\n * @return {string}\n * - The control text when getting\n */\n controlText(text, el = this.menuButton_.el()) {\n return this.menuButton_.controlText(text, el);\n }\n\n /**\n * Dispose of the `menu-button` and all child components.\n */\n dispose() {\n this.handleMouseLeave();\n super.dispose();\n }\n\n /**\n * Handle a click on a `MenuButton`.\n * See {@link ClickableComponent#handleClick} for instances where this is called.\n *\n * @param {Event} event\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n if (this.buttonPressed_) {\n this.unpressButton();\n } else {\n this.pressButton();\n }\n }\n\n /**\n * Handle `mouseleave` for `MenuButton`.\n *\n * @param {Event} event\n * The `mouseleave` event that caused this function to be called.\n *\n * @listens mouseleave\n */\n handleMouseLeave(event) {\n this.removeClass('vjs-hover');\n off(document, 'keyup', this.handleMenuKeyUp_);\n }\n\n /**\n * Set the focus to the actual button, not to this element\n */\n focus() {\n this.menuButton_.focus();\n }\n\n /**\n * Remove the focus from the actual button, not this element\n */\n blur() {\n this.menuButton_.blur();\n }\n\n /**\n * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n *\n * @param {Event} event\n * The `keydown` event that caused this function to be called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n // Escape or Tab unpress the 'button'\n if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n if (this.buttonPressed_) {\n this.unpressButton();\n }\n\n // Don't preventDefault for Tab key - we still want to lose focus\n if (!keycode.isEventKey(event, 'Tab')) {\n event.preventDefault();\n // Set focus back to the menu button's button\n this.menuButton_.focus();\n }\n // Up Arrow or Down Arrow also 'press' the button to open the menu\n } else if (keycode.isEventKey(event, 'Up') || keycode.isEventKey(event, 'Down')) {\n if (!this.buttonPressed_) {\n event.preventDefault();\n this.pressButton();\n }\n }\n }\n\n /**\n * Handle a `keyup` event on a `MenuButton`. The listener for this is added in\n * the constructor.\n *\n * @param {Event} event\n * Key press event\n *\n * @listens keyup\n */\n handleMenuKeyUp(event) {\n // Escape hides popup menu\n if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n this.removeClass('vjs-hover');\n }\n }\n\n /**\n * This method name now delegates to `handleSubmenuKeyDown`. This means\n * anyone calling `handleSubmenuKeyPress` will not see their method calls\n * stop working.\n *\n * @param {Event} event\n * The event that caused this function to be called.\n */\n handleSubmenuKeyPress(event) {\n this.handleSubmenuKeyDown(event);\n }\n\n /**\n * Handle a `keydown` event on a sub-menu. The listener for this is added in\n * the constructor.\n *\n * @param {Event} event\n * Key press event\n *\n * @listens keydown\n */\n handleSubmenuKeyDown(event) {\n // Escape or Tab unpress the 'button'\n if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n if (this.buttonPressed_) {\n this.unpressButton();\n }\n // Don't preventDefault for Tab key - we still want to lose focus\n if (!keycode.isEventKey(event, 'Tab')) {\n event.preventDefault();\n // Set focus back to the menu button's button\n this.menuButton_.focus();\n }\n }\n }\n\n /**\n * Put the current `MenuButton` into a pressed state.\n */\n pressButton() {\n if (this.enabled_) {\n this.buttonPressed_ = true;\n this.menu.show();\n this.menu.lockShowing();\n this.menuButton_.el_.setAttribute('aria-expanded', 'true');\n\n // set the focus into the submenu, except on iOS where it is resulting in\n // undesired scrolling behavior when the player is in an iframe\n if (IS_IOS && isInFrame()) {\n // Return early so that the menu isn't focused\n return;\n }\n this.menu.focus();\n }\n }\n\n /**\n * Take the current `MenuButton` out of a pressed state.\n */\n unpressButton() {\n if (this.enabled_) {\n this.buttonPressed_ = false;\n this.menu.unlockShowing();\n this.menu.hide();\n this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n }\n }\n\n /**\n * Disable the `MenuButton`. Don't allow it to be clicked.\n */\n disable() {\n this.unpressButton();\n this.enabled_ = false;\n this.addClass('vjs-disabled');\n this.menuButton_.disable();\n }\n\n /**\n * Enable the `MenuButton`. Allow it to be clicked.\n */\n enable() {\n this.enabled_ = true;\n this.removeClass('vjs-disabled');\n this.menuButton_.enable();\n }\n }\n Component$1.registerComponent('MenuButton', MenuButton);\n\n /**\n * @file track-button.js\n */\n\n /**\n * The base class for buttons that toggle specific track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n class TrackButton extends MenuButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n const tracks = options.tracks;\n super(player, options);\n if (this.items.length <= 1) {\n this.hide();\n }\n if (!tracks) {\n return;\n }\n const updateHandler = bind_(this, this.update);\n tracks.addEventListener('removetrack', updateHandler);\n tracks.addEventListener('addtrack', updateHandler);\n tracks.addEventListener('labelchange', updateHandler);\n this.player_.on('ready', updateHandler);\n this.player_.on('dispose', function () {\n tracks.removeEventListener('removetrack', updateHandler);\n tracks.removeEventListener('addtrack', updateHandler);\n tracks.removeEventListener('labelchange', updateHandler);\n });\n }\n }\n Component$1.registerComponent('TrackButton', TrackButton);\n\n /**\n * @file menu-keys.js\n */\n\n /**\n * All keys used for operation of a menu (`MenuButton`, `Menu`, and `MenuItem`)\n * Note that 'Enter' and 'Space' are not included here (otherwise they would\n * prevent the `MenuButton` and `MenuItem` from being keyboard-clickable)\n *\n * @typedef MenuKeys\n * @array\n */\n const MenuKeys = ['Tab', 'Esc', 'Up', 'Down', 'Right', 'Left'];\n\n /**\n * @file menu-item.js\n */\n\n /**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n class MenuItem extends ClickableComponent {\n /**\n * Creates an instance of the this class.\n *\n * @param { import('../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n *\n */\n constructor(player, options) {\n super(player, options);\n this.selectable = options.selectable;\n this.isSelected_ = options.selected || false;\n this.multiSelectable = options.multiSelectable;\n this.selected(this.isSelected_);\n if (this.selectable) {\n if (this.multiSelectable) {\n this.el_.setAttribute('role', 'menuitemcheckbox');\n } else {\n this.el_.setAttribute('role', 'menuitemradio');\n }\n } else {\n this.el_.setAttribute('role', 'menuitem');\n }\n }\n\n /**\n * Create the `MenuItem's DOM element\n *\n * @param {string} [type=li]\n * Element's node type, not actually used, always set to `li`.\n *\n * @param {Object} [props={}]\n * An object of properties that should be set on the element\n *\n * @param {Object} [attrs={}]\n * An object of attributes that should be set on the element\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl(type, props, attrs) {\n // The control is textual, not just an icon\n this.nonIconControl = true;\n const el = super.createEl('li', Object.assign({\n className: 'vjs-menu-item',\n tabIndex: -1\n }, props), attrs);\n\n // swap icon with menu item text.\n el.replaceChild(createEl('span', {\n className: 'vjs-menu-item-text',\n textContent: this.localize(this.options_.label)\n }), el.querySelector('.vjs-icon-placeholder'));\n return el;\n }\n\n /**\n * Ignore keys which are used by the menu, but pass any other ones up. See\n * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n *\n * @param {Event} event\n * The `keydown` event that caused this function to be called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n if (!MenuKeys.some(key => keycode.isEventKey(event, key))) {\n // Pass keydown handling up for unused keys\n super.handleKeyDown(event);\n }\n }\n\n /**\n * Any click on a `MenuItem` puts it into the selected state.\n * See {@link ClickableComponent#handleClick} for instances where this is called.\n *\n * @param {Event} event\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n this.selected(true);\n }\n\n /**\n * Set the state for this menu item as selected or not.\n *\n * @param {boolean} selected\n * if the menu item is selected or not\n */\n selected(selected) {\n if (this.selectable) {\n if (selected) {\n this.addClass('vjs-selected');\n this.el_.setAttribute('aria-checked', 'true');\n // aria-checked isn't fully supported by browsers/screen readers,\n // so indicate selected state to screen reader in the control text.\n this.controlText(', selected');\n this.isSelected_ = true;\n } else {\n this.removeClass('vjs-selected');\n this.el_.setAttribute('aria-checked', 'false');\n // Indicate un-selected state to screen reader\n this.controlText('');\n this.isSelected_ = false;\n }\n }\n }\n }\n Component$1.registerComponent('MenuItem', MenuItem);\n\n /**\n * @file text-track-menu-item.js\n */\n\n /**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n class TextTrackMenuItem extends MenuItem {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n const track = options.track;\n const tracks = player.textTracks();\n\n // Modify options for parent MenuItem class's init.\n options.label = track.label || track.language || 'Unknown';\n options.selected = track.mode === 'showing';\n super(player, options);\n this.track = track;\n // Determine the relevant kind(s) of tracks for this component and filter\n // out empty kinds.\n this.kinds = (options.kinds || [options.kind || this.track.kind]).filter(Boolean);\n const changeHandler = (...args) => {\n this.handleTracksChange.apply(this, args);\n };\n const selectedLanguageChangeHandler = (...args) => {\n this.handleSelectedLanguageChange.apply(this, args);\n };\n player.on(['loadstart', 'texttrackchange'], changeHandler);\n tracks.addEventListener('change', changeHandler);\n tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n this.on('dispose', function () {\n player.off(['loadstart', 'texttrackchange'], changeHandler);\n tracks.removeEventListener('change', changeHandler);\n tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n });\n\n // iOS7 doesn't dispatch change events to TextTrackLists when an\n // associated track's mode changes. Without something like\n // Object.observe() (also not present on iOS7), it's not\n // possible to detect changes to the mode attribute and polyfill\n // the change event. As a poor substitute, we manually dispatch\n // change events whenever the controls modify the mode.\n if (tracks.onchange === undefined) {\n let event;\n this.on(['tap', 'click'], function () {\n if (typeof window.Event !== 'object') {\n // Android 2.3 throws an Illegal Constructor error for window.Event\n try {\n event = new window.Event('change');\n } catch (err) {\n // continue regardless of error\n }\n }\n if (!event) {\n event = document.createEvent('Event');\n event.initEvent('change', true, true);\n }\n tracks.dispatchEvent(event);\n });\n }\n\n // set the default state based on current tracks\n this.handleTracksChange();\n }\n\n /**\n * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} event\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n const referenceTrack = this.track;\n const tracks = this.player_.textTracks();\n super.handleClick(event);\n if (!tracks) {\n return;\n }\n for (let i = 0; i < tracks.length; i++) {\n const track = tracks[i];\n\n // If the track from the text tracks list is not of the right kind,\n // skip it. We do not want to affect tracks of incompatible kind(s).\n if (this.kinds.indexOf(track.kind) === -1) {\n continue;\n }\n\n // If this text track is the component's track and it is not showing,\n // set it to showing.\n if (track === referenceTrack) {\n if (track.mode !== 'showing') {\n track.mode = 'showing';\n }\n\n // If this text track is not the component's track and it is not\n // disabled, set it to disabled.\n } else if (track.mode !== 'disabled') {\n track.mode = 'disabled';\n }\n }\n }\n\n /**\n * Handle text track list change\n *\n * @param {Event} event\n * The `change` event that caused this function to be called.\n *\n * @listens TextTrackList#change\n */\n handleTracksChange(event) {\n const shouldBeSelected = this.track.mode === 'showing';\n\n // Prevent redundant selected() calls because they may cause\n // screen readers to read the appended control text unnecessarily\n if (shouldBeSelected !== this.isSelected_) {\n this.selected(shouldBeSelected);\n }\n }\n handleSelectedLanguageChange(event) {\n if (this.track.mode === 'showing') {\n const selectedLanguage = this.player_.cache_.selectedLanguage;\n\n // Don't replace the kind of track across the same language\n if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n return;\n }\n this.player_.cache_.selectedLanguage = {\n enabled: true,\n language: this.track.language,\n kind: this.track.kind\n };\n }\n }\n dispose() {\n // remove reference to track object on dispose\n this.track = null;\n super.dispose();\n }\n }\n Component$1.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n\n /**\n * @file off-text-track-menu-item.js\n */\n\n /**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n class OffTextTrackMenuItem extends TextTrackMenuItem {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n // Create pseudo track info\n // Requires options['kind']\n options.track = {\n player,\n // it is no longer necessary to store `kind` or `kinds` on the track itself\n // since they are now stored in the `kinds` property of all instances of\n // TextTrackMenuItem, but this will remain for backwards compatibility\n kind: options.kind,\n kinds: options.kinds,\n default: false,\n mode: 'disabled'\n };\n if (!options.kinds) {\n options.kinds = [options.kind];\n }\n if (options.label) {\n options.track.label = options.label;\n } else {\n options.track.label = options.kinds.join(' and ') + ' off';\n }\n\n // MenuItem is selectable\n options.selectable = true;\n // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n options.multiSelectable = false;\n super(player, options);\n }\n\n /**\n * Handle text track change\n *\n * @param {Event} event\n * The event that caused this function to run\n */\n handleTracksChange(event) {\n const tracks = this.player().textTracks();\n let shouldBeSelected = true;\n for (let i = 0, l = tracks.length; i < l; i++) {\n const track = tracks[i];\n if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n shouldBeSelected = false;\n break;\n }\n }\n\n // Prevent redundant selected() calls because they may cause\n // screen readers to read the appended control text unnecessarily\n if (shouldBeSelected !== this.isSelected_) {\n this.selected(shouldBeSelected);\n }\n }\n handleSelectedLanguageChange(event) {\n const tracks = this.player().textTracks();\n let allHidden = true;\n for (let i = 0, l = tracks.length; i < l; i++) {\n const track = tracks[i];\n if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n allHidden = false;\n break;\n }\n }\n if (allHidden) {\n this.player_.cache_.selectedLanguage = {\n enabled: false\n };\n }\n }\n\n /**\n * Update control text and label on languagechange\n */\n handleLanguagechange() {\n this.$('.vjs-menu-item-text').textContent = this.player_.localize(this.options_.label);\n super.handleLanguagechange();\n }\n }\n Component$1.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n\n /**\n * @file text-track-button.js\n */\n\n /**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n class TextTrackButton extends TrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n */\n constructor(player, options = {}) {\n options.tracks = player.textTracks();\n super(player, options);\n }\n\n /**\n * Create a menu item for each text track\n *\n * @param {TextTrackMenuItem[]} [items=[]]\n * Existing array of items to use during creation\n *\n * @return {TextTrackMenuItem[]}\n * Array of menu items that were created\n */\n createItems(items = [], TrackMenuItem = TextTrackMenuItem) {\n // Label is an override for the [track] off label\n // USed to localise captions/subtitles\n let label;\n if (this.label_) {\n label = `${this.label_} off`;\n }\n // Add an OFF menu item to turn all tracks off\n items.push(new OffTextTrackMenuItem(this.player_, {\n kinds: this.kinds_,\n kind: this.kind_,\n label\n }));\n this.hideThreshold_ += 1;\n const tracks = this.player_.textTracks();\n if (!Array.isArray(this.kinds_)) {\n this.kinds_ = [this.kind_];\n }\n for (let i = 0; i < tracks.length; i++) {\n const track = tracks[i];\n\n // only add tracks that are of an appropriate kind and have a label\n if (this.kinds_.indexOf(track.kind) > -1) {\n const item = new TrackMenuItem(this.player_, {\n track,\n kinds: this.kinds_,\n kind: this.kind_,\n // MenuItem is selectable\n selectable: true,\n // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n multiSelectable: false\n });\n item.addClass(`vjs-${track.kind}-menu-item`);\n items.push(item);\n }\n }\n return items;\n }\n }\n Component$1.registerComponent('TextTrackButton', TextTrackButton);\n\n /**\n * @file chapters-track-menu-item.js\n */\n\n /**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n class ChaptersTrackMenuItem extends MenuItem {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n const track = options.track;\n const cue = options.cue;\n const currentTime = player.currentTime();\n\n // Modify options for parent MenuItem class's init.\n options.selectable = true;\n options.multiSelectable = false;\n options.label = cue.text;\n options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n super(player, options);\n this.track = track;\n this.cue = cue;\n }\n\n /**\n * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n super.handleClick();\n this.player_.currentTime(this.cue.startTime);\n }\n }\n Component$1.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n\n /**\n * @file chapters-button.js\n */\n\n /**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n class ChaptersButton extends TextTrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function to call when this function is ready.\n */\n constructor(player, options, ready) {\n super(player, options, ready);\n this.selectCurrentItem_ = () => {\n this.items.forEach(item => {\n item.selected(this.track_.activeCues[0] === item.cue);\n });\n };\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-chapters-button ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-chapters-button ${super.buildWrapperCSSClass()}`;\n }\n\n /**\n * Update the menu based on the current state of its items.\n *\n * @param {Event} [event]\n * An event that triggered this function to run.\n *\n * @listens TextTrackList#addtrack\n * @listens TextTrackList#removetrack\n * @listens TextTrackList#change\n */\n update(event) {\n if (event && event.track && event.track.kind !== 'chapters') {\n return;\n }\n const track = this.findChaptersTrack();\n if (track !== this.track_) {\n this.setTrack(track);\n super.update();\n } else if (!this.items || track && track.cues && track.cues.length !== this.items.length) {\n // Update the menu initially or if the number of cues has changed since set\n super.update();\n }\n }\n\n /**\n * Set the currently selected track for the chapters button.\n *\n * @param {TextTrack} track\n * The new track to select. Nothing will change if this is the currently selected\n * track.\n */\n setTrack(track) {\n if (this.track_ === track) {\n return;\n }\n if (!this.updateHandler_) {\n this.updateHandler_ = this.update.bind(this);\n }\n\n // here this.track_ refers to the old track instance\n if (this.track_) {\n const remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n if (remoteTextTrackEl) {\n remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n }\n this.track_.removeEventListener('cuechange', this.selectCurrentItem_);\n this.track_ = null;\n }\n this.track_ = track;\n\n // here this.track_ refers to the new track instance\n if (this.track_) {\n this.track_.mode = 'hidden';\n const remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n if (remoteTextTrackEl) {\n remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n }\n this.track_.addEventListener('cuechange', this.selectCurrentItem_);\n }\n }\n\n /**\n * Find the track object that is currently in use by this ChaptersButton\n *\n * @return {TextTrack|undefined}\n * The current track or undefined if none was found.\n */\n findChaptersTrack() {\n const tracks = this.player_.textTracks() || [];\n for (let i = tracks.length - 1; i >= 0; i--) {\n // We will always choose the last track as our chaptersTrack\n const track = tracks[i];\n if (track.kind === this.kind_) {\n return track;\n }\n }\n }\n\n /**\n * Get the caption for the ChaptersButton based on the track label. This will also\n * use the current tracks localized kind as a fallback if a label does not exist.\n *\n * @return {string}\n * The tracks current label or the localized track kind.\n */\n getMenuCaption() {\n if (this.track_ && this.track_.label) {\n return this.track_.label;\n }\n return this.localize(toTitleCase$1(this.kind_));\n }\n\n /**\n * Create menu from chapter track\n *\n * @return { import('../../menu/menu').default }\n * New menu for the chapter buttons\n */\n createMenu() {\n this.options_.title = this.getMenuCaption();\n return super.createMenu();\n }\n\n /**\n * Create a menu item for each text track\n *\n * @return { import('./text-track-menu-item').default[] }\n * Array of menu items\n */\n createItems() {\n const items = [];\n if (!this.track_) {\n return items;\n }\n const cues = this.track_.cues;\n if (!cues) {\n return items;\n }\n for (let i = 0, l = cues.length; i < l; i++) {\n const cue = cues[i];\n const mi = new ChaptersTrackMenuItem(this.player_, {\n track: this.track_,\n cue\n });\n items.push(mi);\n }\n return items;\n }\n }\n\n /**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n ChaptersButton.prototype.kind_ = 'chapters';\n\n /**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n ChaptersButton.prototype.controlText_ = 'Chapters';\n Component$1.registerComponent('ChaptersButton', ChaptersButton);\n\n /**\n * @file descriptions-button.js\n */\n\n /**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n class DescriptionsButton extends TextTrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function to call when this component is ready.\n */\n constructor(player, options, ready) {\n super(player, options, ready);\n const tracks = player.textTracks();\n const changeHandler = bind_(this, this.handleTracksChange);\n tracks.addEventListener('change', changeHandler);\n this.on('dispose', function () {\n tracks.removeEventListener('change', changeHandler);\n });\n }\n\n /**\n * Handle text track change\n *\n * @param {Event} event\n * The event that caused this function to run\n *\n * @listens TextTrackList#change\n */\n handleTracksChange(event) {\n const tracks = this.player().textTracks();\n let disabled = false;\n\n // Check whether a track of a different kind is showing\n for (let i = 0, l = tracks.length; i < l; i++) {\n const track = tracks[i];\n if (track.kind !== this.kind_ && track.mode === 'showing') {\n disabled = true;\n break;\n }\n }\n\n // If another track is showing, disable this menu button\n if (disabled) {\n this.disable();\n } else {\n this.enable();\n }\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-descriptions-button ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-descriptions-button ${super.buildWrapperCSSClass()}`;\n }\n }\n\n /**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n DescriptionsButton.prototype.kind_ = 'descriptions';\n\n /**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n DescriptionsButton.prototype.controlText_ = 'Descriptions';\n Component$1.registerComponent('DescriptionsButton', DescriptionsButton);\n\n /**\n * @file subtitles-button.js\n */\n\n /**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n class SubtitlesButton extends TextTrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function to call when this component is ready.\n */\n constructor(player, options, ready) {\n super(player, options, ready);\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-subtitles-button ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-subtitles-button ${super.buildWrapperCSSClass()}`;\n }\n }\n\n /**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n SubtitlesButton.prototype.kind_ = 'subtitles';\n\n /**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n SubtitlesButton.prototype.controlText_ = 'Subtitles';\n Component$1.registerComponent('SubtitlesButton', SubtitlesButton);\n\n /**\n * @file caption-settings-menu-item.js\n */\n\n /**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n class CaptionSettingsMenuItem extends TextTrackMenuItem {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n options.track = {\n player,\n kind: options.kind,\n label: options.kind + ' settings',\n selectable: false,\n default: false,\n mode: 'disabled'\n };\n\n // CaptionSettingsMenuItem has no concept of 'selected'\n options.selectable = false;\n options.name = 'CaptionSettingsMenuItem';\n super(player, options);\n this.addClass('vjs-texttrack-settings');\n this.controlText(', opens ' + options.kind + ' settings dialog');\n }\n\n /**\n * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n this.player().getChild('textTrackSettings').open();\n }\n\n /**\n * Update control text and label on languagechange\n */\n handleLanguagechange() {\n this.$('.vjs-menu-item-text').textContent = this.player_.localize(this.options_.kind + ' settings');\n super.handleLanguagechange();\n }\n }\n Component$1.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n\n /**\n * @file captions-button.js\n */\n\n /**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n class CaptionsButton extends TextTrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function to call when this component is ready.\n */\n constructor(player, options, ready) {\n super(player, options, ready);\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-captions-button ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-captions-button ${super.buildWrapperCSSClass()}`;\n }\n\n /**\n * Create caption menu items\n *\n * @return {CaptionSettingsMenuItem[]}\n * The array of current menu items.\n */\n createItems() {\n const items = [];\n if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n items.push(new CaptionSettingsMenuItem(this.player_, {\n kind: this.kind_\n }));\n this.hideThreshold_ += 1;\n }\n return super.createItems(items);\n }\n }\n\n /**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n CaptionsButton.prototype.kind_ = 'captions';\n\n /**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n CaptionsButton.prototype.controlText_ = 'Captions';\n Component$1.registerComponent('CaptionsButton', CaptionsButton);\n\n /**\n * @file subs-caps-menu-item.js\n */\n\n /**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n class SubsCapsMenuItem extends TextTrackMenuItem {\n createEl(type, props, attrs) {\n const el = super.createEl(type, props, attrs);\n const parentSpan = el.querySelector('.vjs-menu-item-text');\n if (this.options_.track.kind === 'captions') {\n parentSpan.appendChild(createEl('span', {\n className: 'vjs-icon-placeholder'\n }, {\n 'aria-hidden': true\n }));\n parentSpan.appendChild(createEl('span', {\n className: 'vjs-control-text',\n // space added as the text will visually flow with the\n // label\n textContent: ` ${this.localize('Captions')}`\n }));\n }\n return el;\n }\n }\n Component$1.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n\n /**\n * @file sub-caps-button.js\n */\n\n /**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n class SubsCapsButton extends TextTrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * The function to call when this component is ready.\n */\n constructor(player, options = {}) {\n super(player, options);\n\n // Although North America uses \"captions\" in most cases for\n // \"captions and subtitles\" other locales use \"subtitles\"\n this.label_ = 'subtitles';\n if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(this.player_.language_) > -1) {\n this.label_ = 'captions';\n }\n this.menuButton_.controlText(toTitleCase$1(this.label_));\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-subs-caps-button ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-subs-caps-button ${super.buildWrapperCSSClass()}`;\n }\n\n /**\n * Create caption/subtitles menu items\n *\n * @return {CaptionSettingsMenuItem[]}\n * The array of current menu items.\n */\n createItems() {\n let items = [];\n if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n items.push(new CaptionSettingsMenuItem(this.player_, {\n kind: this.label_\n }));\n this.hideThreshold_ += 1;\n }\n items = super.createItems(items, SubsCapsMenuItem);\n return items;\n }\n }\n\n /**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n SubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n\n /**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @protected\n */\n SubsCapsButton.prototype.controlText_ = 'Subtitles';\n Component$1.registerComponent('SubsCapsButton', SubsCapsButton);\n\n /**\n * @file audio-track-menu-item.js\n */\n\n /**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n class AudioTrackMenuItem extends MenuItem {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n const track = options.track;\n const tracks = player.audioTracks();\n\n // Modify options for parent MenuItem class's init.\n options.label = track.label || track.language || 'Unknown';\n options.selected = track.enabled;\n super(player, options);\n this.track = track;\n this.addClass(`vjs-${track.kind}-menu-item`);\n const changeHandler = (...args) => {\n this.handleTracksChange.apply(this, args);\n };\n tracks.addEventListener('change', changeHandler);\n this.on('dispose', () => {\n tracks.removeEventListener('change', changeHandler);\n });\n }\n createEl(type, props, attrs) {\n const el = super.createEl(type, props, attrs);\n const parentSpan = el.querySelector('.vjs-menu-item-text');\n if (this.options_.track.kind === 'main-desc') {\n parentSpan.appendChild(createEl('span', {\n className: 'vjs-icon-placeholder'\n }, {\n 'aria-hidden': true\n }));\n parentSpan.appendChild(createEl('span', {\n className: 'vjs-control-text',\n textContent: ' ' + this.localize('Descriptions')\n }));\n }\n return el;\n }\n\n /**\n * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n * for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n super.handleClick(event);\n\n // the audio track list will automatically toggle other tracks\n // off for us.\n this.track.enabled = true;\n\n // when native audio tracks are used, we want to make sure that other tracks are turned off\n if (this.player_.tech_.featuresNativeAudioTracks) {\n const tracks = this.player_.audioTracks();\n for (let i = 0; i < tracks.length; i++) {\n const track = tracks[i];\n\n // skip the current track since we enabled it above\n if (track === this.track) {\n continue;\n }\n track.enabled = track === this.track;\n }\n }\n }\n\n /**\n * Handle any {@link AudioTrack} change.\n *\n * @param {Event} [event]\n * The {@link AudioTrackList#change} event that caused this to run.\n *\n * @listens AudioTrackList#change\n */\n handleTracksChange(event) {\n this.selected(this.track.enabled);\n }\n }\n Component$1.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n\n /**\n * @file audio-track-button.js\n */\n\n /**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n class AudioTrackButton extends TrackButton {\n /**\n * Creates an instance of this class.\n *\n * @param {Player} player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options={}]\n * The key/value store of player options.\n */\n constructor(player, options = {}) {\n options.tracks = player.audioTracks();\n super(player, options);\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-audio-button ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-audio-button ${super.buildWrapperCSSClass()}`;\n }\n\n /**\n * Create a menu item for each audio track\n *\n * @param {AudioTrackMenuItem[]} [items=[]]\n * An array of existing menu items to use.\n *\n * @return {AudioTrackMenuItem[]}\n * An array of menu items\n */\n createItems(items = []) {\n // if there's only one audio track, there no point in showing it\n this.hideThreshold_ = 1;\n const tracks = this.player_.audioTracks();\n for (let i = 0; i < tracks.length; i++) {\n const track = tracks[i];\n items.push(new AudioTrackMenuItem(this.player_, {\n track,\n // MenuItem is selectable\n selectable: true,\n // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n multiSelectable: false\n }));\n }\n return items;\n }\n }\n\n /**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @protected\n */\n AudioTrackButton.prototype.controlText_ = 'Audio Track';\n Component$1.registerComponent('AudioTrackButton', AudioTrackButton);\n\n /**\n * @file playback-rate-menu-item.js\n */\n\n /**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n class PlaybackRateMenuItem extends MenuItem {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n const label = options.rate;\n const rate = parseFloat(label, 10);\n\n // Modify options for parent MenuItem class's init.\n options.label = label;\n options.selected = rate === player.playbackRate();\n options.selectable = true;\n options.multiSelectable = false;\n super(player, options);\n this.label = label;\n this.rate = rate;\n this.on(player, 'ratechange', e => this.update(e));\n }\n\n /**\n * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n * {@link ClickableComponent} for more detailed information on what a click can be.\n *\n * @param {Event} [event]\n * The `keydown`, `tap`, or `click` event that caused this function to be\n * called.\n *\n * @listens tap\n * @listens click\n */\n handleClick(event) {\n super.handleClick();\n this.player().playbackRate(this.rate);\n }\n\n /**\n * Update the PlaybackRateMenuItem when the playbackrate changes.\n *\n * @param {Event} [event]\n * The `ratechange` event that caused this function to run.\n *\n * @listens Player#ratechange\n */\n update(event) {\n this.selected(this.player().playbackRate() === this.rate);\n }\n }\n\n /**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n PlaybackRateMenuItem.prototype.contentElType = 'button';\n Component$1.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n\n /**\n * @file playback-rate-menu-button.js\n */\n\n /**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n class PlaybackRateMenuButton extends MenuButton {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.menuButton_.el_.setAttribute('aria-describedby', this.labelElId_);\n this.updateVisibility();\n this.updateLabel();\n this.on(player, 'loadstart', e => this.updateVisibility(e));\n this.on(player, 'ratechange', e => this.updateLabel(e));\n this.on(player, 'playbackrateschange', e => this.handlePlaybackRateschange(e));\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n const el = super.createEl();\n this.labelElId_ = 'vjs-playback-rate-value-label-' + this.id_;\n this.labelEl_ = createEl('div', {\n className: 'vjs-playback-rate-value',\n id: this.labelElId_,\n textContent: '1x'\n });\n el.appendChild(this.labelEl_);\n return el;\n }\n dispose() {\n this.labelEl_ = null;\n super.dispose();\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-playback-rate ${super.buildCSSClass()}`;\n }\n buildWrapperCSSClass() {\n return `vjs-playback-rate ${super.buildWrapperCSSClass()}`;\n }\n\n /**\n * Create the list of menu items. Specific to each subclass.\n *\n */\n createItems() {\n const rates = this.playbackRates();\n const items = [];\n for (let i = rates.length - 1; i >= 0; i--) {\n items.push(new PlaybackRateMenuItem(this.player(), {\n rate: rates[i] + 'x'\n }));\n }\n return items;\n }\n\n /**\n * On playbackrateschange, update the menu to account for the new items.\n *\n * @listens Player#playbackrateschange\n */\n handlePlaybackRateschange(event) {\n this.update();\n }\n\n /**\n * Get possible playback rates\n *\n * @return {Array}\n * All possible playback rates\n */\n playbackRates() {\n const player = this.player();\n return player.playbackRates && player.playbackRates() || [];\n }\n\n /**\n * Get whether playback rates is supported by the tech\n * and an array of playback rates exists\n *\n * @return {boolean}\n * Whether changing playback rate is supported\n */\n playbackRateSupported() {\n return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n }\n\n /**\n * Hide playback rate controls when they're no playback rate options to select\n *\n * @param {Event} [event]\n * The event that caused this function to run.\n *\n * @listens Player#loadstart\n */\n updateVisibility(event) {\n if (this.playbackRateSupported()) {\n this.removeClass('vjs-hidden');\n } else {\n this.addClass('vjs-hidden');\n }\n }\n\n /**\n * Update button label when rate changed\n *\n * @param {Event} [event]\n * The event that caused this function to run.\n *\n * @listens Player#ratechange\n */\n updateLabel(event) {\n if (this.playbackRateSupported()) {\n this.labelEl_.textContent = this.player().playbackRate() + 'x';\n }\n }\n }\n\n /**\n * The text that should display over the `PlaybackRateMenuButton`s controls.\n *\n * Added for localization.\n *\n * @type {string}\n * @protected\n */\n PlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\n Component$1.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n\n /**\n * @file spacer.js\n */\n\n /**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n class Spacer extends Component$1 {\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-spacer ${super.buildCSSClass()}`;\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl(tag = 'div', props = {}, attributes = {}) {\n if (!props.className) {\n props.className = this.buildCSSClass();\n }\n return super.createEl(tag, props, attributes);\n }\n }\n Component$1.registerComponent('Spacer', Spacer);\n\n /**\n * @file custom-control-spacer.js\n */\n\n /**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n class CustomControlSpacer extends Spacer {\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n */\n buildCSSClass() {\n return `vjs-custom-control-spacer ${super.buildCSSClass()}`;\n }\n\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: this.buildCSSClass(),\n // No-flex/table-cell mode requires there be some content\n // in the cell to fill the remaining space of the table.\n textContent: '\\u00a0'\n });\n }\n }\n Component$1.registerComponent('CustomControlSpacer', CustomControlSpacer);\n\n /**\n * @file control-bar.js\n */\n\n /**\n * Container of main controls.\n *\n * @extends Component\n */\n class ControlBar extends Component$1 {\n /**\n * Create the `Component`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n return super.createEl('div', {\n className: 'vjs-control-bar',\n dir: 'ltr'\n });\n }\n }\n\n /**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n ControlBar.prototype.options_ = {\n children: ['playToggle', 'skipBackward', 'skipForward', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'seekToLive', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n };\n if ('exitPictureInPicture' in document) {\n ControlBar.prototype.options_.children.splice(ControlBar.prototype.options_.children.length - 1, 0, 'pictureInPictureToggle');\n }\n Component$1.registerComponent('ControlBar', ControlBar);\n\n /**\n * @file error-display.js\n */\n\n /**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n class ErrorDisplay extends ModalDialog {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n super(player, options);\n this.on(player, 'error', e => this.open(e));\n }\n\n /**\n * Builds the default DOM `className`.\n *\n * @return {string}\n * The DOM `className` for this object.\n *\n * @deprecated Since version 5.\n */\n buildCSSClass() {\n return `vjs-error-display ${super.buildCSSClass()}`;\n }\n\n /**\n * Gets the localized error message based on the `Player`s error.\n *\n * @return {string}\n * The `Player`s error message localized or an empty string.\n */\n content() {\n const error = this.player().error();\n return error ? this.localize(error.message) : '';\n }\n }\n\n /**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n ErrorDisplay.prototype.options_ = Object.assign({}, ModalDialog.prototype.options_, {\n pauseOnOpen: false,\n fillAlways: true,\n temporary: false,\n uncloseable: true\n });\n Component$1.registerComponent('ErrorDisplay', ErrorDisplay);\n\n /**\n * @file text-track-settings.js\n */\n const LOCAL_STORAGE_KEY$1 = 'vjs-text-track-settings';\n const COLOR_BLACK = ['#000', 'Black'];\n const COLOR_BLUE = ['#00F', 'Blue'];\n const COLOR_CYAN = ['#0FF', 'Cyan'];\n const COLOR_GREEN = ['#0F0', 'Green'];\n const COLOR_MAGENTA = ['#F0F', 'Magenta'];\n const COLOR_RED = ['#F00', 'Red'];\n const COLOR_WHITE = ['#FFF', 'White'];\n const COLOR_YELLOW = ['#FF0', 'Yellow'];\n const OPACITY_OPAQUE = ['1', 'Opaque'];\n const OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\n const OPACITY_TRANS = ['0', 'Transparent'];\n\n // Configuration for the various <select> elements in the DOM of this component.\n //\n // Possible keys include:\n //\n // `default`:\n // The default option index. Only needs to be provided if not zero.\n // `parser`:\n // A function which is used to parse the value from the selected option in\n // a customized way.\n // `selector`:\n // The selector used to find the associated <select> element.\n const selectConfigs = {\n backgroundColor: {\n selector: '.vjs-bg-color > select',\n id: 'captions-background-color-%s',\n label: 'Color',\n options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n },\n backgroundOpacity: {\n selector: '.vjs-bg-opacity > select',\n id: 'captions-background-opacity-%s',\n label: 'Opacity',\n options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n },\n color: {\n selector: '.vjs-text-color > select',\n id: 'captions-foreground-color-%s',\n label: 'Color',\n options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n },\n edgeStyle: {\n selector: '.vjs-edge-style > select',\n id: '%s',\n label: 'Text Edge Style',\n options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n },\n fontFamily: {\n selector: '.vjs-font-family > select',\n id: 'captions-font-family-%s',\n label: 'Font Family',\n options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n },\n fontPercent: {\n selector: '.vjs-font-percent > select',\n id: 'captions-font-size-%s',\n label: 'Font Size',\n options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n default: 2,\n parser: v => v === '1.00' ? null : Number(v)\n },\n textOpacity: {\n selector: '.vjs-text-opacity > select',\n id: 'captions-foreground-opacity-%s',\n label: 'Opacity',\n options: [OPACITY_OPAQUE, OPACITY_SEMI]\n },\n // Options for this object are defined below.\n windowColor: {\n selector: '.vjs-window-color > select',\n id: 'captions-window-color-%s',\n label: 'Color'\n },\n // Options for this object are defined below.\n windowOpacity: {\n selector: '.vjs-window-opacity > select',\n id: 'captions-window-opacity-%s',\n label: 'Opacity',\n options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n }\n };\n selectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n\n /**\n * Get the actual value of an option.\n *\n * @param {string} value\n * The value to get\n *\n * @param {Function} [parser]\n * Optional function to adjust the value.\n *\n * @return {*}\n * - Will be `undefined` if no value exists\n * - Will be `undefined` if the given value is \"none\".\n * - Will be the actual value otherwise.\n *\n * @private\n */\n function parseOptionValue(value, parser) {\n if (parser) {\n value = parser(value);\n }\n if (value && value !== 'none') {\n return value;\n }\n }\n\n /**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param {Element} el\n * the element to look in\n *\n * @param {Function} [parser]\n * Optional function to adjust the value.\n *\n * @return {*}\n * - Will be `undefined` if no value exists\n * - Will be `undefined` if the given value is \"none\".\n * - Will be the actual value otherwise.\n *\n * @private\n */\n function getSelectedOptionValue(el, parser) {\n const value = el.options[el.options.selectedIndex].value;\n return parseOptionValue(value, parser);\n }\n\n /**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n * The element to look in.\n *\n * @param {string} value\n * the property to look on.\n *\n * @param {Function} [parser]\n * Optional function to adjust the value before comparing.\n *\n * @private\n */\n function setSelectedOption(el, value, parser) {\n if (!value) {\n return;\n }\n for (let i = 0; i < el.options.length; i++) {\n if (parseOptionValue(el.options[i].value, parser) === value) {\n el.selectedIndex = i;\n break;\n }\n }\n }\n\n /**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n class TextTrackSettings extends ModalDialog {\n /**\n * Creates an instance of this class.\n *\n * @param { import('../player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n */\n constructor(player, options) {\n options.temporary = false;\n super(player, options);\n this.updateDisplay = this.updateDisplay.bind(this);\n\n // fill the modal and pretend we have opened it\n this.fill();\n this.hasBeenOpened_ = this.hasBeenFilled_ = true;\n this.endDialog = createEl('p', {\n className: 'vjs-control-text',\n textContent: this.localize('End of dialog window.')\n });\n this.el().appendChild(this.endDialog);\n this.setDefaults();\n\n // Grab `persistTextTrackSettings` from the player options if not passed in child options\n if (options.persistTextTrackSettings === undefined) {\n this.options_.persistTextTrackSettings = this.options_.playerOptions.persistTextTrackSettings;\n }\n this.on(this.$('.vjs-done-button'), 'click', () => {\n this.saveSettings();\n this.close();\n });\n this.on(this.$('.vjs-default-button'), 'click', () => {\n this.setDefaults();\n this.updateDisplay();\n });\n each(selectConfigs, config => {\n this.on(this.$(config.selector), 'change', this.updateDisplay);\n });\n if (this.options_.persistTextTrackSettings) {\n this.restoreSettings();\n }\n }\n dispose() {\n this.endDialog = null;\n super.dispose();\n }\n\n /**\n * Create a <select> element with configured options.\n *\n * @param {string} key\n * Configuration key to use during creation.\n *\n * @return {string}\n * An HTML string.\n *\n * @private\n */\n createElSelect_(key, legendId = '', type = 'label') {\n const config = selectConfigs[key];\n const id = config.id.replace('%s', this.id_);\n const selectLabelledbyIds = [legendId, id].join(' ').trim();\n return [`<${type} id=\"${id}\" class=\"${type === 'label' ? 'vjs-label' : ''}\">`, this.localize(config.label), `</${type}>`, `<select aria-labelledby=\"${selectLabelledbyIds}\">`].concat(config.options.map(o => {\n const optionId = id + '-' + o[1].replace(/\\W+/g, '');\n return [`<option id=\"${optionId}\" value=\"${o[0]}\" `, `aria-labelledby=\"${selectLabelledbyIds} ${optionId}\">`, this.localize(o[1]), '</option>'].join('');\n })).concat('</select>').join('');\n }\n\n /**\n * Create foreground color element for the component\n *\n * @return {string}\n * An HTML string.\n *\n * @private\n */\n createElFgColor_() {\n const legendId = `captions-text-legend-${this.id_}`;\n return ['<fieldset class=\"vjs-fg vjs-track-setting\">', `<legend id=\"${legendId}\">`, this.localize('Text'), '</legend>', '<span class=\"vjs-text-color\">', this.createElSelect_('color', legendId), '</span>', '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n }\n\n /**\n * Create background color element for the component\n *\n * @return {string}\n * An HTML string.\n *\n * @private\n */\n createElBgColor_() {\n const legendId = `captions-background-${this.id_}`;\n return ['<fieldset class=\"vjs-bg vjs-track-setting\">', `<legend id=\"${legendId}\">`, this.localize('Text Background'), '</legend>', '<span class=\"vjs-bg-color\">', this.createElSelect_('backgroundColor', legendId), '</span>', '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n }\n\n /**\n * Create window color element for the component\n *\n * @return {string}\n * An HTML string.\n *\n * @private\n */\n createElWinColor_() {\n const legendId = `captions-window-${this.id_}`;\n return ['<fieldset class=\"vjs-window vjs-track-setting\">', `<legend id=\"${legendId}\">`, this.localize('Caption Area Background'), '</legend>', '<span class=\"vjs-window-color\">', this.createElSelect_('windowColor', legendId), '</span>', '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n }\n\n /**\n * Create color elements for the component\n *\n * @return {Element}\n * The element that was created\n *\n * @private\n */\n createElColors_() {\n return createEl('div', {\n className: 'vjs-track-settings-colors',\n innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n });\n }\n\n /**\n * Create font elements for the component\n *\n * @return {Element}\n * The element that was created.\n *\n * @private\n */\n createElFont_() {\n return createEl('div', {\n className: 'vjs-track-settings-font',\n innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n });\n }\n\n /**\n * Create controls for the component\n *\n * @return {Element}\n * The element that was created.\n *\n * @private\n */\n createElControls_() {\n const defaultsDescription = this.localize('restore all settings to the default values');\n return createEl('div', {\n className: 'vjs-track-settings-controls',\n innerHTML: [`<button type=\"button\" class=\"vjs-default-button\" title=\"${defaultsDescription}\">`, this.localize('Reset'), `<span class=\"vjs-control-text\"> ${defaultsDescription}</span>`, '</button>', `<button type=\"button\" class=\"vjs-done-button\">${this.localize('Done')}</button>`].join('')\n });\n }\n content() {\n return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n }\n label() {\n return this.localize('Caption Settings Dialog');\n }\n description() {\n return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n }\n buildCSSClass() {\n return super.buildCSSClass() + ' vjs-text-track-settings';\n }\n\n /**\n * Gets an object of text track settings (or null).\n *\n * @return {Object}\n * An object with config values parsed from the DOM or localStorage.\n */\n getValues() {\n return reduce(selectConfigs, (accum, config, key) => {\n const value = getSelectedOptionValue(this.$(config.selector), config.parser);\n if (value !== undefined) {\n accum[key] = value;\n }\n return accum;\n }, {});\n }\n\n /**\n * Sets text track settings from an object of values.\n *\n * @param {Object} values\n * An object with config values parsed from the DOM or localStorage.\n */\n setValues(values) {\n each(selectConfigs, (config, key) => {\n setSelectedOption(this.$(config.selector), values[key], config.parser);\n });\n }\n\n /**\n * Sets all `<select>` elements to their default values.\n */\n setDefaults() {\n each(selectConfigs, config => {\n const index = config.hasOwnProperty('default') ? config.default : 0;\n this.$(config.selector).selectedIndex = index;\n });\n }\n\n /**\n * Restore texttrack settings from localStorage\n */\n restoreSettings() {\n let values;\n try {\n values = JSON.parse(window.localStorage.getItem(LOCAL_STORAGE_KEY$1));\n } catch (err) {\n log$1.warn(err);\n }\n if (values) {\n this.setValues(values);\n }\n }\n\n /**\n * Save text track settings to localStorage\n */\n saveSettings() {\n if (!this.options_.persistTextTrackSettings) {\n return;\n }\n const values = this.getValues();\n try {\n if (Object.keys(values).length) {\n window.localStorage.setItem(LOCAL_STORAGE_KEY$1, JSON.stringify(values));\n } else {\n window.localStorage.removeItem(LOCAL_STORAGE_KEY$1);\n }\n } catch (err) {\n log$1.warn(err);\n }\n }\n\n /**\n * Update display of text track settings\n */\n updateDisplay() {\n const ttDisplay = this.player_.getChild('textTrackDisplay');\n if (ttDisplay) {\n ttDisplay.updateDisplay();\n }\n }\n\n /**\n * conditionally blur the element and refocus the captions button\n *\n * @private\n */\n conditionalBlur_() {\n this.previouslyActiveEl_ = null;\n const cb = this.player_.controlBar;\n const subsCapsBtn = cb && cb.subsCapsButton;\n const ccBtn = cb && cb.captionsButton;\n if (subsCapsBtn) {\n subsCapsBtn.focus();\n } else if (ccBtn) {\n ccBtn.focus();\n }\n }\n\n /**\n * Repopulate dialog with new localizations on languagechange\n */\n handleLanguagechange() {\n this.fill();\n }\n }\n Component$1.registerComponent('TextTrackSettings', TextTrackSettings);\n\n /**\n * @file resize-manager.js\n */\n\n /**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n *\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n * resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n class ResizeManager extends Component$1 {\n /**\n * Create the ResizeManager.\n *\n * @param {Object} player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of ResizeManager options.\n *\n * @param {Object} [options.ResizeObserver]\n * A polyfill for ResizeObserver can be passed in here.\n * If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n */\n constructor(player, options) {\n let RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window.ResizeObserver;\n\n // if `null` was passed, we want to disable the ResizeObserver\n if (options.ResizeObserver === null) {\n RESIZE_OBSERVER_AVAILABLE = false;\n }\n\n // Only create an element when ResizeObserver isn't available\n const options_ = merge$2({\n createEl: !RESIZE_OBSERVER_AVAILABLE,\n reportTouchActivity: false\n }, options);\n super(player, options_);\n this.ResizeObserver = options.ResizeObserver || window.ResizeObserver;\n this.loadListener_ = null;\n this.resizeObserver_ = null;\n this.debouncedHandler_ = debounce(() => {\n this.resizeHandler();\n }, 100, false, this);\n if (RESIZE_OBSERVER_AVAILABLE) {\n this.resizeObserver_ = new this.ResizeObserver(this.debouncedHandler_);\n this.resizeObserver_.observe(player.el());\n } else {\n this.loadListener_ = () => {\n if (!this.el_ || !this.el_.contentWindow) {\n return;\n }\n const debouncedHandler_ = this.debouncedHandler_;\n let unloadListener_ = this.unloadListener_ = function () {\n off(this, 'resize', debouncedHandler_);\n off(this, 'unload', unloadListener_);\n unloadListener_ = null;\n };\n\n // safari and edge can unload the iframe before resizemanager dispose\n // we have to dispose of event handlers correctly before that happens\n on(this.el_.contentWindow, 'unload', unloadListener_);\n on(this.el_.contentWindow, 'resize', debouncedHandler_);\n };\n this.one('load', this.loadListener_);\n }\n }\n createEl() {\n return super.createEl('iframe', {\n className: 'vjs-resize-manager',\n tabIndex: -1,\n title: this.localize('No content')\n }, {\n 'aria-hidden': 'true'\n });\n }\n\n /**\n * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n *\n * @fires Player#playerresize\n */\n resizeHandler() {\n /**\n * Called when the player size has changed\n *\n * @event Player#playerresize\n * @type {Event}\n */\n // make sure player is still around to trigger\n // prevents this from causing an error after dispose\n if (!this.player_ || !this.player_.trigger) {\n return;\n }\n this.player_.trigger('playerresize');\n }\n dispose() {\n if (this.debouncedHandler_) {\n this.debouncedHandler_.cancel();\n }\n if (this.resizeObserver_) {\n if (this.player_.el()) {\n this.resizeObserver_.unobserve(this.player_.el());\n }\n this.resizeObserver_.disconnect();\n }\n if (this.loadListener_) {\n this.off('load', this.loadListener_);\n }\n if (this.el_ && this.el_.contentWindow && this.unloadListener_) {\n this.unloadListener_.call(this.el_.contentWindow);\n }\n this.ResizeObserver = null;\n this.resizeObserver = null;\n this.debouncedHandler_ = null;\n this.loadListener_ = null;\n super.dispose();\n }\n }\n Component$1.registerComponent('ResizeManager', ResizeManager);\n\n const defaults = {\n trackingThreshold: 20,\n liveTolerance: 15\n };\n\n /*\n track when we are at the live edge, and other helpers for live playback */\n\n /**\n * A class for checking live current time and determining when the player\n * is at or behind the live edge.\n */\n class LiveTracker extends Component$1 {\n /**\n * Creates an instance of this class.\n *\n * @param { import('./player').default } player\n * The `Player` that this class should be attached to.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {number} [options.trackingThreshold=20]\n * Number of seconds of live window (seekableEnd - seekableStart) that\n * media needs to have before the liveui will be shown.\n *\n * @param {number} [options.liveTolerance=15]\n * Number of seconds behind live that we have to be\n * before we will be considered non-live. Note that this will only\n * be used when playing at the live edge. This allows large seekable end\n * changes to not effect whether we are live or not.\n */\n constructor(player, options) {\n // LiveTracker does not need an element\n const options_ = merge$2(defaults, options, {\n createEl: false\n });\n super(player, options_);\n this.trackLiveHandler_ = () => this.trackLive_();\n this.handlePlay_ = e => this.handlePlay(e);\n this.handleFirstTimeupdate_ = e => this.handleFirstTimeupdate(e);\n this.handleSeeked_ = e => this.handleSeeked(e);\n this.seekToLiveEdge_ = e => this.seekToLiveEdge(e);\n this.reset_();\n this.on(this.player_, 'durationchange', e => this.handleDurationchange(e));\n // we should try to toggle tracking on canplay as native playback engines, like Safari\n // may not have the proper values for things like seekableEnd until then\n this.on(this.player_, 'canplay', () => this.toggleTracking());\n }\n\n /**\n * all the functionality for tracking when seek end changes\n * and for tracking how far past seek end we should be\n */\n trackLive_() {\n const seekable = this.player_.seekable();\n\n // skip undefined seekable\n if (!seekable || !seekable.length) {\n return;\n }\n const newTime = Number(window.performance.now().toFixed(4));\n const deltaTime = this.lastTime_ === -1 ? 0 : (newTime - this.lastTime_) / 1000;\n this.lastTime_ = newTime;\n this.pastSeekEnd_ = this.pastSeekEnd() + deltaTime;\n const liveCurrentTime = this.liveCurrentTime();\n const currentTime = this.player_.currentTime();\n\n // we are behind live if any are true\n // 1. the player is paused\n // 2. the user seeked to a location 2 seconds away from live\n // 3. the difference between live and current time is greater\n // liveTolerance which defaults to 15s\n let isBehind = this.player_.paused() || this.seekedBehindLive_ || Math.abs(liveCurrentTime - currentTime) > this.options_.liveTolerance;\n\n // we cannot be behind if\n // 1. until we have not seen a timeupdate yet\n // 2. liveCurrentTime is Infinity, which happens on Android and Native Safari\n if (!this.timeupdateSeen_ || liveCurrentTime === Infinity) {\n isBehind = false;\n }\n if (isBehind !== this.behindLiveEdge_) {\n this.behindLiveEdge_ = isBehind;\n this.trigger('liveedgechange');\n }\n }\n\n /**\n * handle a durationchange event on the player\n * and start/stop tracking accordingly.\n */\n handleDurationchange() {\n this.toggleTracking();\n }\n\n /**\n * start/stop tracking\n */\n toggleTracking() {\n if (this.player_.duration() === Infinity && this.liveWindow() >= this.options_.trackingThreshold) {\n if (this.player_.options_.liveui) {\n this.player_.addClass('vjs-liveui');\n }\n this.startTracking();\n } else {\n this.player_.removeClass('vjs-liveui');\n this.stopTracking();\n }\n }\n\n /**\n * start tracking live playback\n */\n startTracking() {\n if (this.isTracking()) {\n return;\n }\n\n // If we haven't seen a timeupdate, we need to check whether playback\n // began before this component started tracking. This can happen commonly\n // when using autoplay.\n if (!this.timeupdateSeen_) {\n this.timeupdateSeen_ = this.player_.hasStarted();\n }\n this.trackingInterval_ = this.setInterval(this.trackLiveHandler_, UPDATE_REFRESH_INTERVAL);\n this.trackLive_();\n this.on(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n if (!this.timeupdateSeen_) {\n this.one(this.player_, 'play', this.handlePlay_);\n this.one(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n } else {\n this.on(this.player_, 'seeked', this.handleSeeked_);\n }\n }\n\n /**\n * handle the first timeupdate on the player if it wasn't already playing\n * when live tracker started tracking.\n */\n handleFirstTimeupdate() {\n this.timeupdateSeen_ = true;\n this.on(this.player_, 'seeked', this.handleSeeked_);\n }\n\n /**\n * Keep track of what time a seek starts, and listen for seeked\n * to find where a seek ends.\n */\n handleSeeked() {\n const timeDiff = Math.abs(this.liveCurrentTime() - this.player_.currentTime());\n this.seekedBehindLive_ = this.nextSeekedFromUser_ && timeDiff > 2;\n this.nextSeekedFromUser_ = false;\n this.trackLive_();\n }\n\n /**\n * handle the first play on the player, and make sure that we seek\n * right to the live edge.\n */\n handlePlay() {\n this.one(this.player_, 'timeupdate', this.seekToLiveEdge_);\n }\n\n /**\n * Stop tracking, and set all internal variables to\n * their initial value.\n */\n reset_() {\n this.lastTime_ = -1;\n this.pastSeekEnd_ = 0;\n this.lastSeekEnd_ = -1;\n this.behindLiveEdge_ = true;\n this.timeupdateSeen_ = false;\n this.seekedBehindLive_ = false;\n this.nextSeekedFromUser_ = false;\n this.clearInterval(this.trackingInterval_);\n this.trackingInterval_ = null;\n this.off(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n this.off(this.player_, 'seeked', this.handleSeeked_);\n this.off(this.player_, 'play', this.handlePlay_);\n this.off(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n this.off(this.player_, 'timeupdate', this.seekToLiveEdge_);\n }\n\n /**\n * The next seeked event is from the user. Meaning that any seek\n * > 2s behind live will be considered behind live for real and\n * liveTolerance will be ignored.\n */\n nextSeekedFromUser() {\n this.nextSeekedFromUser_ = true;\n }\n\n /**\n * stop tracking live playback\n */\n stopTracking() {\n if (!this.isTracking()) {\n return;\n }\n this.reset_();\n this.trigger('liveedgechange');\n }\n\n /**\n * A helper to get the player seekable end\n * so that we don't have to null check everywhere\n *\n * @return {number}\n * The furthest seekable end or Infinity.\n */\n seekableEnd() {\n const seekable = this.player_.seekable();\n const seekableEnds = [];\n let i = seekable ? seekable.length : 0;\n while (i--) {\n seekableEnds.push(seekable.end(i));\n }\n\n // grab the furthest seekable end after sorting, or if there are none\n // default to Infinity\n return seekableEnds.length ? seekableEnds.sort()[seekableEnds.length - 1] : Infinity;\n }\n\n /**\n * A helper to get the player seekable start\n * so that we don't have to null check everywhere\n *\n * @return {number}\n * The earliest seekable start or 0.\n */\n seekableStart() {\n const seekable = this.player_.seekable();\n const seekableStarts = [];\n let i = seekable ? seekable.length : 0;\n while (i--) {\n seekableStarts.push(seekable.start(i));\n }\n\n // grab the first seekable start after sorting, or if there are none\n // default to 0\n return seekableStarts.length ? seekableStarts.sort()[0] : 0;\n }\n\n /**\n * Get the live time window aka\n * the amount of time between seekable start and\n * live current time.\n *\n * @return {number}\n * The amount of seconds that are seekable in\n * the live video.\n */\n liveWindow() {\n const liveCurrentTime = this.liveCurrentTime();\n\n // if liveCurrenTime is Infinity then we don't have a liveWindow at all\n if (liveCurrentTime === Infinity) {\n return 0;\n }\n return liveCurrentTime - this.seekableStart();\n }\n\n /**\n * Determines if the player is live, only checks if this component\n * is tracking live playback or not\n *\n * @return {boolean}\n * Whether liveTracker is tracking\n */\n isLive() {\n return this.isTracking();\n }\n\n /**\n * Determines if currentTime is at the live edge and won't fall behind\n * on each seekableendchange\n *\n * @return {boolean}\n * Whether playback is at the live edge\n */\n atLiveEdge() {\n return !this.behindLiveEdge();\n }\n\n /**\n * get what we expect the live current time to be\n *\n * @return {number}\n * The expected live current time\n */\n liveCurrentTime() {\n return this.pastSeekEnd() + this.seekableEnd();\n }\n\n /**\n * The number of seconds that have occurred after seekable end\n * changed. This will be reset to 0 once seekable end changes.\n *\n * @return {number}\n * Seconds past the current seekable end\n */\n pastSeekEnd() {\n const seekableEnd = this.seekableEnd();\n if (this.lastSeekEnd_ !== -1 && seekableEnd !== this.lastSeekEnd_) {\n this.pastSeekEnd_ = 0;\n }\n this.lastSeekEnd_ = seekableEnd;\n return this.pastSeekEnd_;\n }\n\n /**\n * If we are currently behind the live edge, aka currentTime will be\n * behind on a seekableendchange\n *\n * @return {boolean}\n * If we are behind the live edge\n */\n behindLiveEdge() {\n return this.behindLiveEdge_;\n }\n\n /**\n * Whether live tracker is currently tracking or not.\n */\n isTracking() {\n return typeof this.trackingInterval_ === 'number';\n }\n\n /**\n * Seek to the live edge if we are behind the live edge\n */\n seekToLiveEdge() {\n this.seekedBehindLive_ = false;\n if (this.atLiveEdge()) {\n return;\n }\n this.nextSeekedFromUser_ = false;\n this.player_.currentTime(this.liveCurrentTime());\n }\n\n /**\n * Dispose of liveTracker\n */\n dispose() {\n this.stopTracking();\n super.dispose();\n }\n }\n Component$1.registerComponent('LiveTracker', LiveTracker);\n\n /**\n * Displays an element over the player which contains an optional title and\n * description for the current content.\n *\n * Much of the code for this component originated in the now obsolete\n * videojs-dock plugin: https://github.com/brightcove/videojs-dock/\n *\n * @extends Component\n */\n class TitleBar extends Component$1 {\n constructor(player, options) {\n super(player, options);\n this.on('statechanged', e => this.updateDom_());\n this.updateDom_();\n }\n\n /**\n * Create the `TitleBar`'s DOM element\n *\n * @return {Element}\n * The element that was created.\n */\n createEl() {\n this.els = {\n title: createEl('div', {\n className: 'vjs-title-bar-title',\n id: `vjs-title-bar-title-${newGUID()}`\n }),\n description: createEl('div', {\n className: 'vjs-title-bar-description',\n id: `vjs-title-bar-description-${newGUID()}`\n })\n };\n return createEl('div', {\n className: 'vjs-title-bar'\n }, {}, Object.values(this.els));\n }\n\n /**\n * Updates the DOM based on the component's state object.\n */\n updateDom_() {\n const tech = this.player_.tech_;\n const techEl = tech && tech.el_;\n const techAriaAttrs = {\n title: 'aria-labelledby',\n description: 'aria-describedby'\n };\n ['title', 'description'].forEach(k => {\n const value = this.state[k];\n const el = this.els[k];\n const techAriaAttr = techAriaAttrs[k];\n emptyEl(el);\n if (value) {\n textContent(el, value);\n }\n\n // If there is a tech element available, update its ARIA attributes\n // according to whether a title and/or description have been provided.\n if (techEl) {\n techEl.removeAttribute(techAriaAttr);\n if (value) {\n techEl.setAttribute(techAriaAttr, el.id);\n }\n }\n });\n if (this.state.title || this.state.description) {\n this.show();\n } else {\n this.hide();\n }\n }\n\n /**\n * Update the contents of the title bar component with new title and\n * description text.\n *\n * If both title and description are missing, the title bar will be hidden.\n *\n * If either title or description are present, the title bar will be visible.\n *\n * NOTE: Any previously set value will be preserved. To unset a previously\n * set value, you must pass an empty string or null.\n *\n * For example:\n *\n * ```\n * update({title: 'foo', description: 'bar'}) // title: 'foo', description: 'bar'\n * update({description: 'bar2'}) // title: 'foo', description: 'bar2'\n * update({title: ''}) // title: '', description: 'bar2'\n * update({title: 'foo', description: null}) // title: 'foo', description: null\n * ```\n *\n * @param {Object} [options={}]\n * An options object. When empty, the title bar will be hidden.\n *\n * @param {string} [options.title]\n * A title to display in the title bar.\n *\n * @param {string} [options.description]\n * A description to display in the title bar.\n */\n update(options) {\n this.setState(options);\n }\n\n /**\n * Dispose the component.\n */\n dispose() {\n const tech = this.player_.tech_;\n const techEl = tech && tech.el_;\n if (techEl) {\n techEl.removeAttribute('aria-labelledby');\n techEl.removeAttribute('aria-describedby');\n }\n super.dispose();\n this.els = null;\n }\n }\n Component$1.registerComponent('TitleBar', TitleBar);\n\n /**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param { import('./html5').default } tech\n * The tech object that sourceset was setup on\n *\n * @return {boolean}\n * returns false if the sourceset was not fired and true otherwise.\n */\n const sourcesetLoad = tech => {\n const el = tech.el();\n\n // if `el.src` is set, that source will be loaded.\n if (el.hasAttribute('src')) {\n tech.triggerSourceset(el.src);\n return true;\n }\n\n /**\n * Since there isn't a src property on the media element, source elements will be used for\n * implementing the source selection algorithm. This happens asynchronously and\n * for most cases were there is more than one source we cannot tell what source will\n * be loaded, without re-implementing the source selection algorithm. At this time we are not\n * going to do that. There are three special cases that we do handle here though:\n *\n * 1. If there are no sources, do not fire `sourceset`.\n * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n * 3. If there is more than one `<source>` but all of them have the same `src` url.\n * That will be our src.\n */\n const sources = tech.$$('source');\n const srcUrls = [];\n let src = '';\n\n // if there are no sources, do not fire sourceset\n if (!sources.length) {\n return false;\n }\n\n // only count valid/non-duplicate source elements\n for (let i = 0; i < sources.length; i++) {\n const url = sources[i].src;\n if (url && srcUrls.indexOf(url) === -1) {\n srcUrls.push(url);\n }\n }\n\n // there were no valid sources\n if (!srcUrls.length) {\n return false;\n }\n\n // there is only one valid source element url\n // use that\n if (srcUrls.length === 1) {\n src = srcUrls[0];\n }\n tech.triggerSourceset(src);\n return true;\n };\n\n /**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\n const innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n get() {\n return this.cloneNode(true).innerHTML;\n },\n set(v) {\n // make a dummy node to use innerHTML on\n const dummy = document.createElement(this.nodeName.toLowerCase());\n\n // set innerHTML to the value provided\n dummy.innerHTML = v;\n\n // make a document fragment to hold the nodes from dummy\n const docFrag = document.createDocumentFragment();\n\n // copy all of the nodes created by the innerHTML on dummy\n // to the document fragment\n while (dummy.childNodes.length) {\n docFrag.appendChild(dummy.childNodes[0]);\n }\n\n // remove content\n this.innerText = '';\n\n // now we add all of that html in one by appending the\n // document fragment. This is how innerHTML does it.\n window.Element.prototype.appendChild.call(this, docFrag);\n\n // then return the result that innerHTML's setter would\n return this.innerHTML;\n }\n });\n\n /**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\n const getDescriptor = (priority, prop) => {\n let descriptor = {};\n for (let i = 0; i < priority.length; i++) {\n descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n if (descriptor && descriptor.set && descriptor.get) {\n break;\n }\n }\n descriptor.enumerable = true;\n descriptor.configurable = true;\n return descriptor;\n };\n const getInnerHTMLDescriptor = tech => getDescriptor([tech.el(), window.HTMLMediaElement.prototype, window.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n\n /**\n * Patches browser internal functions so that we can tell synchronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` - can be used to add a `<source>` element to the media element\n * - `innerHTML` - can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n * The tech object that sourceset is being setup on.\n */\n const firstSourceWatch = function (tech) {\n const el = tech.el();\n\n // make sure firstSourceWatch isn't setup twice.\n if (el.resetSourceWatch_) {\n return;\n }\n const old = {};\n const innerDescriptor = getInnerHTMLDescriptor(tech);\n const appendWrapper = appendFn => (...args) => {\n const retval = appendFn.apply(el, args);\n sourcesetLoad(tech);\n return retval;\n };\n ['append', 'appendChild', 'insertAdjacentHTML'].forEach(k => {\n if (!el[k]) {\n return;\n }\n\n // store the old function\n old[k] = el[k];\n\n // call the old function with a sourceset if a source\n // was loaded\n el[k] = appendWrapper(old[k]);\n });\n Object.defineProperty(el, 'innerHTML', merge$2(innerDescriptor, {\n set: appendWrapper(innerDescriptor.set)\n }));\n el.resetSourceWatch_ = () => {\n el.resetSourceWatch_ = null;\n Object.keys(old).forEach(k => {\n el[k] = old[k];\n });\n Object.defineProperty(el, 'innerHTML', innerDescriptor);\n };\n\n // on the first sourceset, we need to revert our changes\n tech.one('sourceset', el.resetSourceWatch_);\n };\n\n /**\n * our implementation of a `src` descriptor for browsers\n * that do not have one\n */\n const srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n get() {\n if (this.hasAttribute('src')) {\n return getAbsoluteURL(window.Element.prototype.getAttribute.call(this, 'src'));\n }\n return '';\n },\n set(v) {\n window.Element.prototype.setAttribute.call(this, 'src', v);\n return v;\n }\n });\n const getSrcDescriptor = tech => getDescriptor([tech.el(), window.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n\n /**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n * cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n * The tech to patch\n */\n const setupSourceset = function (tech) {\n if (!tech.featuresSourceset) {\n return;\n }\n const el = tech.el();\n\n // make sure sourceset isn't setup twice.\n if (el.resetSourceset_) {\n return;\n }\n const srcDescriptor = getSrcDescriptor(tech);\n const oldSetAttribute = el.setAttribute;\n const oldLoad = el.load;\n Object.defineProperty(el, 'src', merge$2(srcDescriptor, {\n set: v => {\n const retval = srcDescriptor.set.call(el, v);\n\n // we use the getter here to get the actual value set on src\n tech.triggerSourceset(el.src);\n return retval;\n }\n }));\n el.setAttribute = (n, v) => {\n const retval = oldSetAttribute.call(el, n, v);\n if (/src/i.test(n)) {\n tech.triggerSourceset(el.src);\n }\n return retval;\n };\n el.load = () => {\n const retval = oldLoad.call(el);\n\n // if load was called, but there was no source to fire\n // sourceset on. We have to watch for a source append\n // as that can trigger a `sourceset` when the media element\n // has no source\n if (!sourcesetLoad(tech)) {\n tech.triggerSourceset('');\n firstSourceWatch(tech);\n }\n return retval;\n };\n if (el.currentSrc) {\n tech.triggerSourceset(el.currentSrc);\n } else if (!sourcesetLoad(tech)) {\n firstSourceWatch(tech);\n }\n el.resetSourceset_ = () => {\n el.resetSourceset_ = null;\n el.load = oldLoad;\n el.setAttribute = oldSetAttribute;\n Object.defineProperty(el, 'src', srcDescriptor);\n if (el.resetSourceWatch_) {\n el.resetSourceWatch_();\n }\n };\n };\n\n /**\n * @file html5.js\n */\n\n /**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SourceHandlerAdditions\n * @extends Tech\n */\n class Html5 extends Tech {\n /**\n * Create an instance of this Tech.\n *\n * @param {Object} [options]\n * The key/value store of player options.\n *\n * @param {Function} [ready]\n * Callback function to call when the `HTML5` Tech is ready.\n */\n constructor(options, ready) {\n super(options, ready);\n const source = options.source;\n let crossoriginTracks = false;\n this.featuresVideoFrameCallback = this.featuresVideoFrameCallback && this.el_.tagName === 'VIDEO';\n\n // Set the source if one is provided\n // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n // anyway so the error gets fired.\n if (source && (this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n this.setSource(source);\n } else {\n this.handleLateInit_(this.el_);\n }\n\n // setup sourceset after late sourceset/init\n if (options.enableSourceset) {\n this.setupSourcesetHandling_();\n }\n this.isScrubbing_ = false;\n if (this.el_.hasChildNodes()) {\n const nodes = this.el_.childNodes;\n let nodesLength = nodes.length;\n const removeNodes = [];\n while (nodesLength--) {\n const node = nodes[nodesLength];\n const nodeName = node.nodeName.toLowerCase();\n if (nodeName === 'track') {\n if (!this.featuresNativeTextTracks) {\n // Empty video tag tracks so the built-in player doesn't use them also.\n // This may not be fast enough to stop HTML5 browsers from reading the tags\n // so we'll need to turn off any default tracks if we're manually doing\n // captions and subtitles. videoElement.textTracks\n removeNodes.push(node);\n } else {\n // store HTMLTrackElement and TextTrack to remote list\n this.remoteTextTrackEls().addTrackElement_(node);\n this.remoteTextTracks().addTrack(node.track);\n this.textTracks().addTrack(node.track);\n if (!crossoriginTracks && !this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n crossoriginTracks = true;\n }\n }\n }\n }\n for (let i = 0; i < removeNodes.length; i++) {\n this.el_.removeChild(removeNodes[i]);\n }\n }\n this.proxyNativeTracks_();\n if (this.featuresNativeTextTracks && crossoriginTracks) {\n log$1.warn('Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n' + 'This may prevent text tracks from loading.');\n }\n\n // prevent iOS Safari from disabling metadata text tracks during native playback\n this.restoreMetadataTracksInIOSNativePlayer_();\n\n // Determine if native controls should be used\n // Our goal should be to get the custom controls on mobile solid everywhere\n // so we can remove this all together. Right now this will block custom\n // controls on touch enabled laptops like the Chrome Pixel\n if ((TOUCH_ENABLED || IS_IPHONE) && options.nativeControlsForTouch === true) {\n this.setControls(true);\n }\n\n // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n // into a `fullscreenchange` event\n this.proxyWebkitFullscreen_();\n this.triggerReady();\n }\n\n /**\n * Dispose of `HTML5` media element and remove all tracks.\n */\n dispose() {\n if (this.el_ && this.el_.resetSourceset_) {\n this.el_.resetSourceset_();\n }\n Html5.disposeMediaElement(this.el_);\n this.options_ = null;\n\n // tech will handle clearing of the emulated track list\n super.dispose();\n }\n\n /**\n * Modify the media element so that we can detect when\n * the source is changed. Fires `sourceset` just after the source has changed\n */\n setupSourcesetHandling_() {\n setupSourceset(this);\n }\n\n /**\n * When a captions track is enabled in the iOS Safari native player, all other\n * tracks are disabled (including metadata tracks), which nulls all of their\n * associated cue points. This will restore metadata tracks to their pre-fullscreen\n * state in those cases so that cue points are not needlessly lost.\n *\n * @private\n */\n restoreMetadataTracksInIOSNativePlayer_() {\n const textTracks = this.textTracks();\n let metadataTracksPreFullscreenState;\n\n // captures a snapshot of every metadata track's current state\n const takeMetadataTrackSnapshot = () => {\n metadataTracksPreFullscreenState = [];\n for (let i = 0; i < textTracks.length; i++) {\n const track = textTracks[i];\n if (track.kind === 'metadata') {\n metadataTracksPreFullscreenState.push({\n track,\n storedMode: track.mode\n });\n }\n }\n };\n\n // snapshot each metadata track's initial state, and update the snapshot\n // each time there is a track 'change' event\n takeMetadataTrackSnapshot();\n textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n this.on('dispose', () => textTracks.removeEventListener('change', takeMetadataTrackSnapshot));\n const restoreTrackMode = () => {\n for (let i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n const storedTrack = metadataTracksPreFullscreenState[i];\n if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n storedTrack.track.mode = storedTrack.storedMode;\n }\n }\n // we only want this handler to be executed on the first 'change' event\n textTracks.removeEventListener('change', restoreTrackMode);\n };\n\n // when we enter fullscreen playback, stop updating the snapshot and\n // restore all track modes to their pre-fullscreen state\n this.on('webkitbeginfullscreen', () => {\n textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n\n // remove the listener before adding it just in case it wasn't previously removed\n textTracks.removeEventListener('change', restoreTrackMode);\n textTracks.addEventListener('change', restoreTrackMode);\n });\n\n // start updating the snapshot again after leaving fullscreen\n this.on('webkitendfullscreen', () => {\n // remove the listener before adding it just in case it wasn't previously removed\n textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n\n // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n textTracks.removeEventListener('change', restoreTrackMode);\n });\n }\n\n /**\n * Attempt to force override of tracks for the given type\n *\n * @param {string} type - Track type to override, possible values include 'Audio',\n * 'Video', and 'Text'.\n * @param {boolean} override - If set to true native audio/video will be overridden,\n * otherwise native audio/video will potentially be used.\n * @private\n */\n overrideNative_(type, override) {\n // If there is no behavioral change don't add/remove listeners\n if (override !== this[`featuresNative${type}Tracks`]) {\n return;\n }\n const lowerCaseType = type.toLowerCase();\n if (this[`${lowerCaseType}TracksListeners_`]) {\n Object.keys(this[`${lowerCaseType}TracksListeners_`]).forEach(eventName => {\n const elTracks = this.el()[`${lowerCaseType}Tracks`];\n elTracks.removeEventListener(eventName, this[`${lowerCaseType}TracksListeners_`][eventName]);\n });\n }\n this[`featuresNative${type}Tracks`] = !override;\n this[`${lowerCaseType}TracksListeners_`] = null;\n this.proxyNativeTracksForType_(lowerCaseType);\n }\n\n /**\n * Attempt to force override of native audio tracks.\n *\n * @param {boolean} override - If set to true native audio will be overridden,\n * otherwise native audio will potentially be used.\n */\n overrideNativeAudioTracks(override) {\n this.overrideNative_('Audio', override);\n }\n\n /**\n * Attempt to force override of native video tracks.\n *\n * @param {boolean} override - If set to true native video will be overridden,\n * otherwise native video will potentially be used.\n */\n overrideNativeVideoTracks(override) {\n this.overrideNative_('Video', override);\n }\n\n /**\n * Proxy native track list events for the given type to our track\n * lists if the browser we are playing in supports that type of track list.\n *\n * @param {string} name - Track type; values include 'audio', 'video', and 'text'\n * @private\n */\n proxyNativeTracksForType_(name) {\n const props = NORMAL[name];\n const elTracks = this.el()[props.getterName];\n const techTracks = this[props.getterName]();\n if (!this[`featuresNative${props.capitalName}Tracks`] || !elTracks || !elTracks.addEventListener) {\n return;\n }\n const listeners = {\n change: e => {\n const event = {\n type: 'change',\n target: techTracks,\n currentTarget: techTracks,\n srcElement: techTracks\n };\n techTracks.trigger(event);\n\n // if we are a text track change event, we should also notify the\n // remote text track list. This can potentially cause a false positive\n // if we were to get a change event on a non-remote track and\n // we triggered the event on the remote text track list which doesn't\n // contain that track. However, best practices mean looping through the\n // list of tracks and searching for the appropriate mode value, so,\n // this shouldn't pose an issue\n if (name === 'text') {\n this[REMOTE.remoteText.getterName]().trigger(event);\n }\n },\n addtrack(e) {\n techTracks.addTrack(e.track);\n },\n removetrack(e) {\n techTracks.removeTrack(e.track);\n }\n };\n const removeOldTracks = function () {\n const removeTracks = [];\n for (let i = 0; i < techTracks.length; i++) {\n let found = false;\n for (let j = 0; j < elTracks.length; j++) {\n if (elTracks[j] === techTracks[i]) {\n found = true;\n break;\n }\n }\n if (!found) {\n removeTracks.push(techTracks[i]);\n }\n }\n while (removeTracks.length) {\n techTracks.removeTrack(removeTracks.shift());\n }\n };\n this[props.getterName + 'Listeners_'] = listeners;\n Object.keys(listeners).forEach(eventName => {\n const listener = listeners[eventName];\n elTracks.addEventListener(eventName, listener);\n this.on('dispose', e => elTracks.removeEventListener(eventName, listener));\n });\n\n // Remove (native) tracks that are not used anymore\n this.on('loadstart', removeOldTracks);\n this.on('dispose', e => this.off('loadstart', removeOldTracks));\n }\n\n /**\n * Proxy all native track list events to our track lists if the browser we are playing\n * in supports that type of track list.\n *\n * @private\n */\n proxyNativeTracks_() {\n NORMAL.names.forEach(name => {\n this.proxyNativeTracksForType_(name);\n });\n }\n\n /**\n * Create the `Html5` Tech's DOM element.\n *\n * @return {Element}\n * The element that gets created.\n */\n createEl() {\n let el = this.options_.tag;\n\n // Check if this browser supports moving the element into the box.\n // On the iPhone video will break if you move the element,\n // So we have to create a brand new element.\n // If we ingested the player div, we do not need to move the media element.\n if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n // If the original tag is still there, clone and remove it.\n if (el) {\n const clone = el.cloneNode(true);\n if (el.parentNode) {\n el.parentNode.insertBefore(clone, el);\n }\n Html5.disposeMediaElement(el);\n el = clone;\n } else {\n el = document.createElement('video');\n\n // determine if native controls should be used\n const tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n const attributes = merge$2({}, tagAttributes);\n if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n delete attributes.controls;\n }\n setAttributes(el, Object.assign(attributes, {\n id: this.options_.techId,\n class: 'vjs-tech'\n }));\n }\n el.playerId = this.options_.playerId;\n }\n if (typeof this.options_.preload !== 'undefined') {\n setAttribute(el, 'preload', this.options_.preload);\n }\n if (this.options_.disablePictureInPicture !== undefined) {\n el.disablePictureInPicture = this.options_.disablePictureInPicture;\n }\n\n // Update specific tag settings, in case they were overridden\n // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n // when iOS/Safari or other browsers attempt to autoplay.\n const settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n for (let i = 0; i < settingsAttrs.length; i++) {\n const attr = settingsAttrs[i];\n const value = this.options_[attr];\n if (typeof value !== 'undefined') {\n if (value) {\n setAttribute(el, attr, attr);\n } else {\n removeAttribute(el, attr);\n }\n el[attr] = value;\n }\n }\n return el;\n }\n\n /**\n * This will be triggered if the loadstart event has already fired, before videojs was\n * ready. Two known examples of when this can happen are:\n * 1. If we're loading the playback object after it has started loading\n * 2. The media is already playing the (often with autoplay on) then\n *\n * This function will fire another loadstart so that videojs can catchup.\n *\n * @fires Tech#loadstart\n *\n * @return {undefined}\n * returns nothing.\n */\n handleLateInit_(el) {\n if (el.networkState === 0 || el.networkState === 3) {\n // The video element hasn't started loading the source yet\n // or didn't find a source\n return;\n }\n if (el.readyState === 0) {\n // NetworkState is set synchronously BUT loadstart is fired at the\n // end of the current stack, usually before setInterval(fn, 0).\n // So at this point we know loadstart may have already fired or is\n // about to fire, and either way the player hasn't seen it yet.\n // We don't want to fire loadstart prematurely here and cause a\n // double loadstart so we'll wait and see if it happens between now\n // and the next loop, and fire it if not.\n // HOWEVER, we also want to make sure it fires before loadedmetadata\n // which could also happen between now and the next loop, so we'll\n // watch for that also.\n let loadstartFired = false;\n const setLoadstartFired = function () {\n loadstartFired = true;\n };\n this.on('loadstart', setLoadstartFired);\n const triggerLoadstart = function () {\n // We did miss the original loadstart. Make sure the player\n // sees loadstart before loadedmetadata\n if (!loadstartFired) {\n this.trigger('loadstart');\n }\n };\n this.on('loadedmetadata', triggerLoadstart);\n this.ready(function () {\n this.off('loadstart', setLoadstartFired);\n this.off('loadedmetadata', triggerLoadstart);\n if (!loadstartFired) {\n // We did miss the original native loadstart. Fire it now.\n this.trigger('loadstart');\n }\n });\n return;\n }\n\n // From here on we know that loadstart already fired and we missed it.\n // The other readyState events aren't as much of a problem if we double\n // them, so not going to go to as much trouble as loadstart to prevent\n // that unless we find reason to.\n const eventsToTrigger = ['loadstart'];\n\n // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n eventsToTrigger.push('loadedmetadata');\n\n // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n if (el.readyState >= 2) {\n eventsToTrigger.push('loadeddata');\n }\n\n // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n if (el.readyState >= 3) {\n eventsToTrigger.push('canplay');\n }\n\n // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n if (el.readyState >= 4) {\n eventsToTrigger.push('canplaythrough');\n }\n\n // We still need to give the player time to add event listeners\n this.ready(function () {\n eventsToTrigger.forEach(function (type) {\n this.trigger(type);\n }, this);\n });\n }\n\n /**\n * Set whether we are scrubbing or not.\n * This is used to decide whether we should use `fastSeek` or not.\n * `fastSeek` is used to provide trick play on Safari browsers.\n *\n * @param {boolean} isScrubbing\n * - true for we are currently scrubbing\n * - false for we are no longer scrubbing\n */\n setScrubbing(isScrubbing) {\n this.isScrubbing_ = isScrubbing;\n }\n\n /**\n * Get whether we are scrubbing or not.\n *\n * @return {boolean} isScrubbing\n * - true for we are currently scrubbing\n * - false for we are no longer scrubbing\n */\n scrubbing() {\n return this.isScrubbing_;\n }\n\n /**\n * Set current time for the `HTML5` tech.\n *\n * @param {number} seconds\n * Set the current time of the media to this.\n */\n setCurrentTime(seconds) {\n try {\n if (this.isScrubbing_ && this.el_.fastSeek && IS_ANY_SAFARI) {\n this.el_.fastSeek(seconds);\n } else {\n this.el_.currentTime = seconds;\n }\n } catch (e) {\n log$1(e, 'Video is not ready. (Video.js)');\n // this.warning(VideoJS.warnings.videoNotReady);\n }\n }\n\n /**\n * Get the current duration of the HTML5 media element.\n *\n * @return {number}\n * The duration of the media or 0 if there is no duration.\n */\n duration() {\n // Android Chrome will report duration as Infinity for VOD HLS until after\n // playback has started, which triggers the live display erroneously.\n // Return NaN if playback has not started and trigger a durationupdate once\n // the duration can be reliably known.\n if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n // Wait for the first `timeupdate` with currentTime > 0 - there may be\n // several with 0\n const checkProgress = () => {\n if (this.el_.currentTime > 0) {\n // Trigger durationchange for genuinely live video\n if (this.el_.duration === Infinity) {\n this.trigger('durationchange');\n }\n this.off('timeupdate', checkProgress);\n }\n };\n this.on('timeupdate', checkProgress);\n return NaN;\n }\n return this.el_.duration || NaN;\n }\n\n /**\n * Get the current width of the HTML5 media element.\n *\n * @return {number}\n * The width of the HTML5 media element.\n */\n width() {\n return this.el_.offsetWidth;\n }\n\n /**\n * Get the current height of the HTML5 media element.\n *\n * @return {number}\n * The height of the HTML5 media element.\n */\n height() {\n return this.el_.offsetHeight;\n }\n\n /**\n * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n * `fullscreenchange` event.\n *\n * @private\n * @fires fullscreenchange\n * @listens webkitendfullscreen\n * @listens webkitbeginfullscreen\n * @listens webkitbeginfullscreen\n */\n proxyWebkitFullscreen_() {\n if (!('webkitDisplayingFullscreen' in this.el_)) {\n return;\n }\n const endFn = function () {\n this.trigger('fullscreenchange', {\n isFullscreen: false\n });\n // Safari will sometimes set controls on the videoelement when existing fullscreen.\n if (this.el_.controls && !this.options_.nativeControlsForTouch && this.controls()) {\n this.el_.controls = false;\n }\n };\n const beginFn = function () {\n if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n this.one('webkitendfullscreen', endFn);\n this.trigger('fullscreenchange', {\n isFullscreen: true,\n // set a flag in case another tech triggers fullscreenchange\n nativeIOSFullscreen: true\n });\n }\n };\n this.on('webkitbeginfullscreen', beginFn);\n this.on('dispose', () => {\n this.off('webkitbeginfullscreen', beginFn);\n this.off('webkitendfullscreen', endFn);\n });\n }\n\n /**\n * Check if fullscreen is supported on the video el.\n *\n * @return {boolean}\n * - True if fullscreen is supported.\n * - False if fullscreen is not supported.\n */\n supportsFullScreen() {\n return typeof this.el_.webkitEnterFullScreen === 'function';\n }\n\n /**\n * Request that the `HTML5` Tech enter fullscreen.\n */\n enterFullScreen() {\n const video = this.el_;\n if (video.paused && video.networkState <= video.HAVE_METADATA) {\n // attempt to prime the video element for programmatic access\n // this isn't necessary on the desktop but shouldn't hurt\n silencePromise(this.el_.play());\n\n // playing and pausing synchronously during the transition to fullscreen\n // can get iOS ~6.1 devices into a play/pause loop\n this.setTimeout(function () {\n video.pause();\n try {\n video.webkitEnterFullScreen();\n } catch (e) {\n this.trigger('fullscreenerror', e);\n }\n }, 0);\n } else {\n try {\n video.webkitEnterFullScreen();\n } catch (e) {\n this.trigger('fullscreenerror', e);\n }\n }\n }\n\n /**\n * Request that the `HTML5` Tech exit fullscreen.\n */\n exitFullScreen() {\n if (!this.el_.webkitDisplayingFullscreen) {\n this.trigger('fullscreenerror', new Error('The video is not fullscreen'));\n return;\n }\n this.el_.webkitExitFullScreen();\n }\n\n /**\n * Create a floating video window always on top of other windows so that users may\n * continue consuming media while they interact with other content sites, or\n * applications on their device.\n *\n * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n *\n * @return {Promise}\n * A promise with a Picture-in-Picture window.\n */\n requestPictureInPicture() {\n return this.el_.requestPictureInPicture();\n }\n\n /**\n * Native requestVideoFrameCallback if supported by browser/tech, or fallback\n * Don't use rVCF on Safari when DRM is playing, as it doesn't fire\n * Needs to be checked later than the constructor\n * This will be a false positive for clear sources loaded after a Fairplay source\n *\n * @param {function} cb function to call\n * @return {number} id of request\n */\n requestVideoFrameCallback(cb) {\n if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {\n return this.el_.requestVideoFrameCallback(cb);\n }\n return super.requestVideoFrameCallback(cb);\n }\n\n /**\n * Native or fallback requestVideoFrameCallback\n *\n * @param {number} id request id to cancel\n */\n cancelVideoFrameCallback(id) {\n if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {\n this.el_.cancelVideoFrameCallback(id);\n } else {\n super.cancelVideoFrameCallback(id);\n }\n }\n\n /**\n * A getter/setter for the `Html5` Tech's source object.\n * > Note: Please use {@link Html5#setSource}\n *\n * @param {Tech~SourceObject} [src]\n * The source object you want to set on the `HTML5` techs element.\n *\n * @return {Tech~SourceObject|undefined}\n * - The current source object when a source is not passed in.\n * - undefined when setting\n *\n * @deprecated Since version 5.\n */\n src(src) {\n if (src === undefined) {\n return this.el_.src;\n }\n\n // Setting src through `src` instead of `setSrc` will be deprecated\n this.setSrc(src);\n }\n\n /**\n * Reset the tech by removing all sources and then calling\n * {@link Html5.resetMediaElement}.\n */\n reset() {\n Html5.resetMediaElement(this.el_);\n }\n\n /**\n * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n * the HTML5 media element.\n *\n * @return {Tech~SourceObject}\n * The current source object from the HTML5 tech. With a fallback to the\n * elements source.\n */\n currentSrc() {\n if (this.currentSource_) {\n return this.currentSource_.src;\n }\n return this.el_.currentSrc;\n }\n\n /**\n * Set controls attribute for the HTML5 media Element.\n *\n * @param {string} val\n * Value to set the controls attribute to\n */\n setControls(val) {\n this.el_.controls = !!val;\n }\n\n /**\n * Create and returns a remote {@link TextTrack} object.\n *\n * @param {string} kind\n * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n * Label to identify the text track\n *\n * @param {string} [language]\n * Two letter language abbreviation\n *\n * @return {TextTrack}\n * The TextTrack that gets created.\n */\n addTextTrack(kind, label, language) {\n if (!this.featuresNativeTextTracks) {\n return super.addTextTrack(kind, label, language);\n }\n return this.el_.addTextTrack(kind, label, language);\n }\n\n /**\n * Creates either native TextTrack or an emulated TextTrack depending\n * on the value of `featuresNativeTextTracks`\n *\n * @param {Object} options\n * The object should contain the options to initialize the TextTrack with.\n *\n * @param {string} [options.kind]\n * `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n *\n * @param {string} [options.label]\n * Label to identify the text track\n *\n * @param {string} [options.language]\n * Two letter language abbreviation.\n *\n * @param {boolean} [options.default]\n * Default this track to on.\n *\n * @param {string} [options.id]\n * The internal id to assign this track.\n *\n * @param {string} [options.src]\n * A source url for the track.\n *\n * @return {HTMLTrackElement}\n * The track element that gets created.\n */\n createRemoteTextTrack(options) {\n if (!this.featuresNativeTextTracks) {\n return super.createRemoteTextTrack(options);\n }\n const htmlTrackElement = document.createElement('track');\n if (options.kind) {\n htmlTrackElement.kind = options.kind;\n }\n if (options.label) {\n htmlTrackElement.label = options.label;\n }\n if (options.language || options.srclang) {\n htmlTrackElement.srclang = options.language || options.srclang;\n }\n if (options.default) {\n htmlTrackElement.default = options.default;\n }\n if (options.id) {\n htmlTrackElement.id = options.id;\n }\n if (options.src) {\n htmlTrackElement.src = options.src;\n }\n return htmlTrackElement;\n }\n\n /**\n * Creates a remote text track object and returns an html track element.\n *\n * @param {Object} options The object should contain values for\n * kind, language, label, and src (location of the WebVTT file)\n * @param {boolean} [manualCleanup=false] if set to true, the TextTrack\n * will not be removed from the TextTrackList and HtmlTrackElementList\n * after a source change\n * @return {HTMLTrackElement} An Html Track Element.\n * This can be an emulated {@link HTMLTrackElement} or a native one.\n *\n */\n addRemoteTextTrack(options, manualCleanup) {\n const htmlTrackElement = super.addRemoteTextTrack(options, manualCleanup);\n if (this.featuresNativeTextTracks) {\n this.el().appendChild(htmlTrackElement);\n }\n return htmlTrackElement;\n }\n\n /**\n * Remove remote `TextTrack` from `TextTrackList` object\n *\n * @param {TextTrack} track\n * `TextTrack` object to remove\n */\n removeRemoteTextTrack(track) {\n super.removeRemoteTextTrack(track);\n if (this.featuresNativeTextTracks) {\n const tracks = this.$$('track');\n let i = tracks.length;\n while (i--) {\n if (track === tracks[i] || track === tracks[i].track) {\n this.el().removeChild(tracks[i]);\n }\n }\n }\n }\n\n /**\n * Gets available media playback quality metrics as specified by the W3C's Media\n * Playback Quality API.\n *\n * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n *\n * @return {Object}\n * An object with supported media playback quality metrics\n */\n getVideoPlaybackQuality() {\n if (typeof this.el().getVideoPlaybackQuality === 'function') {\n return this.el().getVideoPlaybackQuality();\n }\n const videoPlaybackQuality = {};\n if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n }\n if (window.performance) {\n videoPlaybackQuality.creationTime = window.performance.now();\n }\n return videoPlaybackQuality;\n }\n }\n\n /* HTML5 Support Testing ---------------------------------------------------- */\n\n /**\n * Element for testing browser HTML5 media capabilities\n *\n * @type {Element}\n * @constant\n * @private\n */\n defineLazyProperty(Html5, 'TEST_VID', function () {\n if (!isReal()) {\n return;\n }\n const video = document.createElement('video');\n const track = document.createElement('track');\n track.kind = 'captions';\n track.srclang = 'en';\n track.label = 'English';\n video.appendChild(track);\n return video;\n });\n\n /**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n * - True if HTML5 media is supported.\n * - False if HTML5 media is not supported.\n */\n Html5.isSupported = function () {\n // IE with no Media Player is a LIAR! (#984)\n try {\n Html5.TEST_VID.volume = 0.5;\n } catch (e) {\n return false;\n }\n return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n };\n\n /**\n * Check if the tech can support the given type\n *\n * @param {string} type\n * The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n Html5.canPlayType = function (type) {\n return Html5.TEST_VID.canPlayType(type);\n };\n\n /**\n * Check if the tech can support the given source\n *\n * @param {Object} srcObj\n * The source object\n * @param {Object} options\n * The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n Html5.canPlaySource = function (srcObj, options) {\n return Html5.canPlayType(srcObj.type);\n };\n\n /**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n * - True if volume can be controlled\n * - False otherwise\n */\n Html5.canControlVolume = function () {\n // IE will error if Windows Media Player not installed #3315\n try {\n const volume = Html5.TEST_VID.volume;\n Html5.TEST_VID.volume = volume / 2 + 0.1;\n const canControl = volume !== Html5.TEST_VID.volume;\n\n // With the introduction of iOS 15, there are cases where the volume is read as\n // changed but reverts back to its original state at the start of the next tick.\n // To determine whether volume can be controlled on iOS,\n // a timeout is set and the volume is checked asynchronously.\n // Since `features` doesn't currently work asynchronously, the value is manually set.\n if (canControl && IS_IOS) {\n window.setTimeout(() => {\n if (Html5 && Html5.prototype) {\n Html5.prototype.featuresVolumeControl = volume !== Html5.TEST_VID.volume;\n }\n });\n\n // default iOS to false, which will be updated in the timeout above.\n return false;\n }\n return canControl;\n } catch (e) {\n return false;\n }\n };\n\n /**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {boolean}\n * - True if volume can be muted\n * - False otherwise\n */\n Html5.canMuteVolume = function () {\n try {\n const muted = Html5.TEST_VID.muted;\n\n // in some versions of iOS muted property doesn't always\n // work, so we want to set both property and attribute\n Html5.TEST_VID.muted = !muted;\n if (Html5.TEST_VID.muted) {\n setAttribute(Html5.TEST_VID, 'muted', 'muted');\n } else {\n removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n }\n return muted !== Html5.TEST_VID.muted;\n } catch (e) {\n return false;\n }\n };\n\n /**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n * - True if playback rate can be controlled\n * - False otherwise\n */\n Html5.canControlPlaybackRate = function () {\n // Playback rate API is implemented in Android Chrome, but doesn't do anything\n // https://github.com/videojs/video.js/issues/3180\n if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n return false;\n }\n // IE will error if Windows Media Player not installed #3315\n try {\n const playbackRate = Html5.TEST_VID.playbackRate;\n Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n return playbackRate !== Html5.TEST_VID.playbackRate;\n } catch (e) {\n return false;\n }\n };\n\n /**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n * - True if builtin attributes can be overridden\n * - False otherwise\n */\n Html5.canOverrideAttributes = function () {\n // if we cannot overwrite the src/innerHTML property, there is no support\n // iOS 7 safari for instance cannot do this.\n try {\n const noop = () => {};\n Object.defineProperty(document.createElement('video'), 'src', {\n get: noop,\n set: noop\n });\n Object.defineProperty(document.createElement('audio'), 'src', {\n get: noop,\n set: noop\n });\n Object.defineProperty(document.createElement('video'), 'innerHTML', {\n get: noop,\n set: noop\n });\n Object.defineProperty(document.createElement('audio'), 'innerHTML', {\n get: noop,\n set: noop\n });\n } catch (e) {\n return false;\n }\n return true;\n };\n\n /**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n * - True if native `TextTrack`s are supported.\n * - False otherwise\n */\n Html5.supportsNativeTextTracks = function () {\n return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n };\n\n /**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n * - True if native `VideoTrack`s are supported.\n * - False otherwise\n */\n Html5.supportsNativeVideoTracks = function () {\n return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n };\n\n /**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n * - True if native `AudioTrack`s are supported.\n * - False otherwise\n */\n Html5.supportsNativeAudioTracks = function () {\n return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n };\n\n /**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\n Html5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n\n /**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\n /**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {boolean}\n * @default {@link Html5.canMuteVolume}\n */\n\n /**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n * - Set player to play 2x (twice) as fast\n * - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\n\n /**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\n /**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\n /**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\n /**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\n [['featuresMuteControl', 'canMuteVolume'], ['featuresPlaybackRate', 'canControlPlaybackRate'], ['featuresSourceset', 'canOverrideAttributes'], ['featuresNativeTextTracks', 'supportsNativeTextTracks'], ['featuresNativeVideoTracks', 'supportsNativeVideoTracks'], ['featuresNativeAudioTracks', 'supportsNativeAudioTracks']].forEach(function ([key, fn]) {\n defineLazyProperty(Html5.prototype, key, () => Html5[fn](), true);\n });\n Html5.prototype.featuresVolumeControl = Html5.canControlVolume();\n\n /**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\n Html5.prototype.movingMediaElementInDOM = !IS_IOS;\n\n // TODO: Previous comment: No longer appears to be used. Can probably be removed.\n // Is this true?\n /**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\n Html5.prototype.featuresFullscreenResize = true;\n\n /**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggered instead.\n *\n * @type {boolean}\n * @default\n */\n Html5.prototype.featuresProgressEvents = true;\n\n /**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggered instead.\n *\n * @default\n */\n Html5.prototype.featuresTimeupdateEvents = true;\n\n /**\n * Whether the HTML5 el supports `requestVideoFrameCallback`\n *\n * @type {boolean}\n */\n Html5.prototype.featuresVideoFrameCallback = !!(Html5.TEST_VID && Html5.TEST_VID.requestVideoFrameCallback);\n Html5.disposeMediaElement = function (el) {\n if (!el) {\n return;\n }\n if (el.parentNode) {\n el.parentNode.removeChild(el);\n }\n\n // remove any child track or source nodes to prevent their loading\n while (el.hasChildNodes()) {\n el.removeChild(el.firstChild);\n }\n\n // remove any src reference. not setting `src=''` because that causes a warning\n // in firefox\n el.removeAttribute('src');\n\n // force the media element to update its loading state by calling load()\n // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n if (typeof el.load === 'function') {\n // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n (function () {\n try {\n el.load();\n } catch (e) {\n // not supported\n }\n })();\n }\n };\n Html5.resetMediaElement = function (el) {\n if (!el) {\n return;\n }\n const sources = el.querySelectorAll('source');\n let i = sources.length;\n while (i--) {\n el.removeChild(sources[i]);\n }\n\n // remove any src reference.\n // not setting `src=''` because that throws an error\n el.removeAttribute('src');\n if (typeof el.load === 'function') {\n // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n (function () {\n try {\n el.load();\n } catch (e) {\n // satisfy linter\n }\n })();\n }\n };\n\n /* Native HTML5 element property wrapping ----------------------------------- */\n // Wrap native boolean attributes with getters that check both property and attribute\n // The list is as followed:\n // muted, defaultMuted, autoplay, controls, loop, playsinline\n [\n /**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n * - True if the value of `volume` should be ignored and the audio set to silent.\n * - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n 'muted',\n /**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n * - The value of `defaultMuted` from the media element.\n * - True indicates that the media should start muted.\n * - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n 'defaultMuted',\n /**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n * - The value of `autoplay` from the media element.\n * - True indicates that the media should start as soon as the page loads.\n * - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n 'autoplay',\n /**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n * - The value of `controls` from the media element.\n * - True indicates that native controls should be showing.\n * - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n 'controls',\n /**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n * - The value of `loop` from the media element.\n * - True indicates that playback should seek back to start once\n * the end of a media is reached.\n * - False indicates that playback should not loop back to the start when the\n * end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n 'loop',\n /**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n * - The value of `playsinline` from the media element.\n * - True indicates that the media should play inline.\n * - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n 'playsinline'].forEach(function (prop) {\n Html5.prototype[prop] = function () {\n return this.el_[prop] || this.el_.hasAttribute(prop);\n };\n });\n\n // Wrap native boolean attributes with setters that set both property and attribute\n // The list is as followed:\n // setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n // setControls is special-cased above\n [\n /**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n * - True if the audio should be set to silent\n * - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n 'muted',\n /**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on initial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n * - True if the audio should be set to silent\n * - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n 'defaultMuted',\n /**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n * - True indicates that the media should start as soon as the page loads.\n * - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n 'autoplay',\n /**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n * - True indicates that playback should seek back to start once\n * the end of a media is reached.\n * - False indicates that playback should not loop back to the start when the\n * end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n 'loop',\n /**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n * - True indicates that the media should play inline.\n * - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n 'playsinline'].forEach(function (prop) {\n Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n this.el_[prop] = v;\n if (v) {\n this.el_.setAttribute(prop, prop);\n } else {\n this.el_.removeAttribute(prop);\n }\n };\n });\n\n // Wrap native properties with a getter\n // The list is as followed\n // paused, currentTime, buffered, volume, poster, preload, error, seeking\n // seekable, ended, playbackRate, defaultPlaybackRate, disablePictureInPicture\n // played, networkState, readyState, videoWidth, videoHeight, crossOrigin\n [\n /**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n * The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n 'paused',\n /**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n * The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n 'currentTime',\n /**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n * The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n 'buffered',\n /**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n * The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n 'volume',\n /**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n * The value of `poster` from the media element. Value will be a url to an\n * image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n 'poster',\n /**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n * media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n * interaction\n *\n * @method Html5#preload\n * @return {string}\n * The value of `preload` from the media element. Will be 'none', 'metadata',\n * or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n 'preload',\n /**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occurred during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n * The value of `error` from the media element. Will be `MediaError` if there\n * is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n 'error',\n /**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n * - The value of `seeking` from the media element.\n * - True indicates that the media is currently seeking to a new position.\n * - False indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n 'seeking',\n /**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n * The value of `seekable` from the media element. A `TimeRange` object\n * indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n 'seekable',\n /**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n * - The value of `ended` from the media element.\n * - True indicates that the media has ended.\n * - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n 'ended',\n /**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n * - if playbackRate is set to 2, media will play twice as fast.\n * - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n * The value of `playbackRate` from the media element. A number indicating\n * the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n 'playbackRate',\n /**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n * - if defaultPlaybackRate is set to 2, media will play twice as fast.\n * - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n * The value of `defaultPlaybackRate` from the media element. A number indicating\n * the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n 'defaultPlaybackRate',\n /**\n * Get the value of 'disablePictureInPicture' from the video element.\n *\n * @method Html5#disablePictureInPicture\n * @return {boolean} value\n * - The value of `disablePictureInPicture` from the video element.\n * - True indicates that the video can't be played in Picture-In-Picture mode\n * - False indicates that the video can be played in Picture-In-Picture mode\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n 'disablePictureInPicture',\n /**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n * The value of `played` from the media element. A `TimeRange` object indicating\n * the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n 'played',\n /**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NETWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n * The value of `networkState` from the media element. This will be a number\n * from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n 'networkState',\n /**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n * The value of `readyState` from the media element. This will be a number\n * from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n 'readyState',\n /**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n * The value of `videoWidth` from the video element. This will be a number\n * in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n 'videoWidth',\n /**\n * Get the value of `videoHeight` from the video element. `videoHeight` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n * The value of `videoHeight` from the video element. This will be a number\n * in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n 'videoHeight',\n /**\n * Get the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#crossOrigin\n * @return {string}\n * - anonymous indicates that the media should not sent cookies.\n * - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n 'crossOrigin'].forEach(function (prop) {\n Html5.prototype[prop] = function () {\n return this.el_[prop];\n };\n });\n\n // Wrap native properties with a setter in this format:\n // set + toTitleCase(name)\n // The list is as follows:\n // setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate,\n // setDisablePictureInPicture, setCrossOrigin\n [\n /**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n * The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n 'volume',\n /**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n * The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n 'src',\n /**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n * The url to an image that should be used as the `poster` for the media\n * element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n 'poster',\n /**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n * media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n * interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n * The value of `preload` to set on the media element. Must be 'none', 'metadata',\n * or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n 'preload',\n /**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n * - if playbackRate is set to 2, media will play twice as fast.\n * - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n * The value of `playbackRate` from the media element. A number indicating\n * the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n 'playbackRate',\n /**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n * - if playbackRate is set to 2, media will play twice as fast.\n * - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n * The value of `defaultPlaybackRate` from the media element. A number indicating\n * the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n 'defaultPlaybackRate',\n /**\n * Prevents the browser from suggesting a Picture-in-Picture context menu\n * or to request Picture-in-Picture automatically in some cases.\n *\n * @method Html5#setDisablePictureInPicture\n * @param {boolean} value\n * The true value will disable Picture-in-Picture mode.\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n 'disablePictureInPicture',\n /**\n * Set the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#setCrossOrigin\n * @param {string} crossOrigin\n * - anonymous indicates that the media should not sent cookies.\n * - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n 'crossOrigin'].forEach(function (prop) {\n Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n this.el_[prop] = v;\n };\n });\n\n // wrap native functions with a function\n // The list is as follows:\n // pause, load, play\n [\n /**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n 'pause',\n /**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n 'load',\n /**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n 'play'].forEach(function (prop) {\n Html5.prototype[prop] = function () {\n return this.el_[prop]();\n };\n });\n Tech.withSourceHandlers(Html5);\n\n /**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @property {Tech~SourceObject} source\n * The source object\n *\n * @property {Html5} tech\n * The instance of the HTML5 tech.\n */\n Html5.nativeSourceHandler = {};\n\n /**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n * The mimetype to check\n *\n * @return {string}\n * 'probably', 'maybe', or '' (empty string)\n */\n Html5.nativeSourceHandler.canPlayType = function (type) {\n // IE without MediaPlayer throws an error (#519)\n try {\n return Html5.TEST_VID.canPlayType(type);\n } catch (e) {\n return '';\n }\n };\n\n /**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n * The source object\n *\n * @param {Object} [options]\n * Options to be passed to the tech.\n *\n * @return {string}\n * 'probably', 'maybe', or '' (empty string).\n */\n Html5.nativeSourceHandler.canHandleSource = function (source, options) {\n // If a type was provided we should rely on that\n if (source.type) {\n return Html5.nativeSourceHandler.canPlayType(source.type);\n\n // If no type, fall back to checking 'video/[EXTENSION]'\n } else if (source.src) {\n const ext = getFileExtension(source.src);\n return Html5.nativeSourceHandler.canPlayType(`video/${ext}`);\n }\n return '';\n };\n\n /**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n * The source object\n *\n * @param {Html5} tech\n * The instance of the Html5 tech\n *\n * @param {Object} [options]\n * The options to pass to the source\n */\n Html5.nativeSourceHandler.handleSource = function (source, tech, options) {\n tech.setSrc(source.src);\n };\n\n /**\n * A noop for the native dispose function, as cleanup is not needed.\n */\n Html5.nativeSourceHandler.dispose = function () {};\n\n // Register the native source handler\n Html5.registerSourceHandler(Html5.nativeSourceHandler);\n Tech.registerTech('Html5', Html5);\n\n /**\n * @file player.js\n */\n\n // The following tech events are simply re-triggered\n // on the player when they happen\n const TECH_EVENTS_RETRIGGER = [\n /**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {Event}\n */\n /**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n 'progress',\n /**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {Event}\n */\n /**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n 'abort',\n /**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {Event}\n */\n /**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n 'suspend',\n /**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {Event}\n */\n /**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n 'emptied',\n /**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {Event}\n */\n /**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n 'stalled',\n /**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {Event}\n */\n /**\n * Retrigger the `loadedmetadata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n 'loadedmetadata',\n /**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n /**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n 'loadeddata',\n /**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n /**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n 'timeupdate',\n /**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n /**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n 'resize',\n /**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n /**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n 'volumechange',\n /**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n /**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n 'texttrackchange'];\n\n // events to queue when playback rate is zero\n // this is a hash for the sole purpose of mapping non-camel-cased event names\n // to camel-cased function names\n const TECH_EVENTS_QUEUE = {\n canplay: 'CanPlay',\n canplaythrough: 'CanPlayThrough',\n playing: 'Playing',\n seeked: 'Seeked'\n };\n const BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\n const BREAKPOINT_CLASSES = {};\n\n // grep: vjs-layout-tiny\n // grep: vjs-layout-x-small\n // grep: vjs-layout-small\n // grep: vjs-layout-medium\n // grep: vjs-layout-large\n // grep: vjs-layout-x-large\n // grep: vjs-layout-huge\n BREAKPOINT_ORDER.forEach(k => {\n const v = k.charAt(0) === 'x' ? `x-${k.substring(1)}` : k;\n BREAKPOINT_CLASSES[k] = `vjs-layout-${v}`;\n });\n const DEFAULT_BREAKPOINTS = {\n tiny: 210,\n xsmall: 320,\n small: 425,\n medium: 768,\n large: 1440,\n xlarge: 2560,\n huge: Infinity\n };\n\n /**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in three ways:\n * 1. By calling `videojs.getPlayer('example_video_1');`\n * 2. By calling `videojs('example_video_1');` (not recomended)\n * 2. By using it directly via `videojs.players.example_video_1;`\n *\n * @extends Component\n * @global\n */\n class Player extends Component$1 {\n /**\n * Create an instance of this class.\n *\n * @param {Element} tag\n * The original video DOM element used for configuring options.\n *\n * @param {Object} [options]\n * Object of option names and values.\n *\n * @param {Function} [ready]\n * Ready callback function.\n */\n constructor(tag, options, ready) {\n // Make sure tag ID exists\n tag.id = tag.id || options.id || `vjs_video_${newGUID()}`;\n\n // Set Options\n // The options argument overrides options set in the video tag\n // which overrides globally set options.\n // This latter part coincides with the load order\n // (tag must exist before Player)\n options = Object.assign(Player.getTagSettings(tag), options);\n\n // Delay the initialization of children because we need to set up\n // player properties first, and can't use `this` before `super()`\n options.initChildren = false;\n\n // Same with creating the element\n options.createEl = false;\n\n // don't auto mixin the evented mixin\n options.evented = false;\n\n // we don't want the player to report touch activity on itself\n // see enableTouchActivity in Component\n options.reportTouchActivity = false;\n\n // If language is not set, get the closest lang attribute\n if (!options.language) {\n const closest = tag.closest('[lang]');\n if (closest) {\n options.language = closest.getAttribute('lang');\n }\n }\n\n // Run base component initializing with new options\n super(null, options, ready);\n\n // Create bound methods for document listeners.\n this.boundDocumentFullscreenChange_ = e => this.documentFullscreenChange_(e);\n this.boundFullWindowOnEscKey_ = e => this.fullWindowOnEscKey(e);\n this.boundUpdateStyleEl_ = e => this.updateStyleEl_(e);\n this.boundApplyInitTime_ = e => this.applyInitTime_(e);\n this.boundUpdateCurrentBreakpoint_ = e => this.updateCurrentBreakpoint_(e);\n this.boundHandleTechClick_ = e => this.handleTechClick_(e);\n this.boundHandleTechDoubleClick_ = e => this.handleTechDoubleClick_(e);\n this.boundHandleTechTouchStart_ = e => this.handleTechTouchStart_(e);\n this.boundHandleTechTouchMove_ = e => this.handleTechTouchMove_(e);\n this.boundHandleTechTouchEnd_ = e => this.handleTechTouchEnd_(e);\n this.boundHandleTechTap_ = e => this.handleTechTap_(e);\n\n // default isFullscreen_ to false\n this.isFullscreen_ = false;\n\n // create logger\n this.log = createLogger(this.id_);\n\n // Hold our own reference to fullscreen api so it can be mocked in tests\n this.fsApi_ = FullscreenApi;\n\n // Tracks when a tech changes the poster\n this.isPosterFromTech_ = false;\n\n // Holds callback info that gets queued when playback rate is zero\n // and a seek is happening\n this.queuedCallbacks_ = [];\n\n // Turn off API access because we're loading a new tech that might load asynchronously\n this.isReady_ = false;\n\n // Init state hasStarted_\n this.hasStarted_ = false;\n\n // Init state userActive_\n this.userActive_ = false;\n\n // Init debugEnabled_\n this.debugEnabled_ = false;\n\n // Init state audioOnlyMode_\n this.audioOnlyMode_ = false;\n\n // Init state audioPosterMode_\n this.audioPosterMode_ = false;\n\n // Init state audioOnlyCache_\n this.audioOnlyCache_ = {\n playerHeight: null,\n hiddenChildren: []\n };\n\n // if the global option object was accidentally blown away by\n // someone, bail early with an informative error\n if (!this.options_ || !this.options_.techOrder || !this.options_.techOrder.length) {\n throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n }\n\n // Store the original tag used to set options\n this.tag = tag;\n\n // Store the tag attributes used to restore html5 element\n this.tagAttributes = tag && getAttributes(tag);\n\n // Update current language\n this.language(this.options_.language);\n\n // Update Supported Languages\n if (options.languages) {\n // Normalise player option languages to lowercase\n const languagesToLower = {};\n Object.getOwnPropertyNames(options.languages).forEach(function (name) {\n languagesToLower[name.toLowerCase()] = options.languages[name];\n });\n this.languages_ = languagesToLower;\n } else {\n this.languages_ = Player.prototype.options_.languages;\n }\n this.resetCache_();\n\n // Set poster\n this.poster_ = options.poster || '';\n\n // Set controls\n this.controls_ = !!options.controls;\n\n // Original tag settings stored in options\n // now remove immediately so native controls don't flash.\n // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n tag.controls = false;\n tag.removeAttribute('controls');\n this.changingSrc_ = false;\n this.playCallbacks_ = [];\n this.playTerminatedQueue_ = [];\n\n // the attribute overrides the option\n if (tag.hasAttribute('autoplay')) {\n this.autoplay(true);\n } else {\n // otherwise use the setter to validate and\n // set the correct value.\n this.autoplay(this.options_.autoplay);\n }\n\n // check plugins\n if (options.plugins) {\n Object.keys(options.plugins).forEach(name => {\n if (typeof this[name] !== 'function') {\n throw new Error(`plugin \"${name}\" does not exist`);\n }\n });\n }\n\n /*\n * Store the internal state of scrubbing\n *\n * @private\n * @return {Boolean} True if the user is scrubbing\n */\n this.scrubbing_ = false;\n this.el_ = this.createEl();\n\n // Make this an evented object and use `el_` as its event bus.\n evented(this, {\n eventBusKey: 'el_'\n });\n\n // listen to document and player fullscreenchange handlers so we receive those events\n // before a user can receive them so we can update isFullscreen appropriately.\n // make sure that we listen to fullscreenchange events before everything else to make sure that\n // our isFullscreen method is updated properly for internal components as well as external.\n if (this.fsApi_.requestFullscreen) {\n on(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n this.on(this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n }\n if (this.fluid_) {\n this.on(['playerreset', 'resize'], this.boundUpdateStyleEl_);\n }\n // We also want to pass the original player options to each component and plugin\n // as well so they don't need to reach back into the player for options later.\n // We also need to do another copy of this.options_ so we don't end up with\n // an infinite loop.\n const playerOptionsCopy = merge$2(this.options_);\n\n // Load plugins\n if (options.plugins) {\n Object.keys(options.plugins).forEach(name => {\n this[name](options.plugins[name]);\n });\n }\n\n // Enable debug mode to fire debugon event for all plugins.\n if (options.debug) {\n this.debug(true);\n }\n this.options_.playerOptions = playerOptionsCopy;\n this.middleware_ = [];\n this.playbackRates(options.playbackRates);\n this.initChildren();\n\n // Set isAudio based on whether or not an audio tag was used\n this.isAudio(tag.nodeName.toLowerCase() === 'audio');\n\n // Update controls className. Can't do this when the controls are initially\n // set because the element doesn't exist yet.\n if (this.controls()) {\n this.addClass('vjs-controls-enabled');\n } else {\n this.addClass('vjs-controls-disabled');\n }\n\n // Set ARIA label and region role depending on player type\n this.el_.setAttribute('role', 'region');\n if (this.isAudio()) {\n this.el_.setAttribute('aria-label', this.localize('Audio Player'));\n } else {\n this.el_.setAttribute('aria-label', this.localize('Video Player'));\n }\n if (this.isAudio()) {\n this.addClass('vjs-audio');\n }\n\n // TODO: Make this smarter. Toggle user state between touching/mousing\n // using events, since devices can have both touch and mouse events.\n // TODO: Make this check be performed again when the window switches between monitors\n // (See https://github.com/videojs/video.js/issues/5683)\n if (TOUCH_ENABLED) {\n this.addClass('vjs-touch-enabled');\n }\n\n // iOS Safari has broken hover handling\n if (!IS_IOS) {\n this.addClass('vjs-workinghover');\n }\n\n // Make player easily findable by ID\n Player.players[this.id_] = this;\n\n // Add a major version class to aid css in plugins\n const majorVersion = version$5.split('.')[0];\n this.addClass(`vjs-v${majorVersion}`);\n\n // When the player is first initialized, trigger activity so components\n // like the control bar show themselves if needed\n this.userActive(true);\n this.reportUserActivity();\n this.one('play', e => this.listenForUserActivity_(e));\n this.on('keydown', e => this.handleKeyDown(e));\n this.on('languagechange', e => this.handleLanguagechange(e));\n this.breakpoints(this.options_.breakpoints);\n this.responsive(this.options_.responsive);\n\n // Calling both the audio mode methods after the player is fully\n // setup to be able to listen to the events triggered by them\n this.on('ready', () => {\n // Calling the audioPosterMode method first so that\n // the audioOnlyMode can take precedence when both options are set to true\n this.audioPosterMode(this.options_.audioPosterMode);\n this.audioOnlyMode(this.options_.audioOnlyMode);\n });\n }\n\n /**\n * Destroys the video player and does any necessary cleanup.\n *\n * This is especially helpful if you are dynamically adding and removing videos\n * to/from the DOM.\n *\n * @fires Player#dispose\n */\n dispose() {\n /**\n * Called when the player is being disposed of.\n *\n * @event Player#dispose\n * @type {Event}\n */\n this.trigger('dispose');\n // prevent dispose from being called twice\n this.off('dispose');\n\n // Make sure all player-specific document listeners are unbound. This is\n off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n off(document, 'keydown', this.boundFullWindowOnEscKey_);\n if (this.styleEl_ && this.styleEl_.parentNode) {\n this.styleEl_.parentNode.removeChild(this.styleEl_);\n this.styleEl_ = null;\n }\n\n // Kill reference to this player\n Player.players[this.id_] = null;\n if (this.tag && this.tag.player) {\n this.tag.player = null;\n }\n if (this.el_ && this.el_.player) {\n this.el_.player = null;\n }\n if (this.tech_) {\n this.tech_.dispose();\n this.isPosterFromTech_ = false;\n this.poster_ = '';\n }\n if (this.playerElIngest_) {\n this.playerElIngest_ = null;\n }\n if (this.tag) {\n this.tag = null;\n }\n clearCacheForPlayer(this);\n\n // remove all event handlers for track lists\n // all tracks and track listeners are removed on\n // tech dispose\n ALL.names.forEach(name => {\n const props = ALL[name];\n const list = this[props.getterName]();\n\n // if it is not a native list\n // we have to manually remove event listeners\n if (list && list.off) {\n list.off();\n }\n });\n\n // the actual .el_ is removed here, or replaced if\n super.dispose({\n restoreEl: this.options_.restoreEl\n });\n }\n\n /**\n * Create the `Player`'s DOM element.\n *\n * @return {Element}\n * The DOM element that gets created.\n */\n createEl() {\n let tag = this.tag;\n let el;\n let playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n const divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n if (playerElIngest) {\n el = this.el_ = tag.parentNode;\n } else if (!divEmbed) {\n el = this.el_ = super.createEl('div');\n }\n\n // Copy over all the attributes from the tag, including ID and class\n // ID will now reference player box, not the video tag\n const attrs = getAttributes(tag);\n if (divEmbed) {\n el = this.el_ = tag;\n tag = this.tag = document.createElement('video');\n while (el.children.length) {\n tag.appendChild(el.firstChild);\n }\n if (!hasClass(el, 'video-js')) {\n addClass(el, 'video-js');\n }\n el.appendChild(tag);\n playerElIngest = this.playerElIngest_ = el;\n // move properties over from our custom `video-js` element\n // to our new `video` element. This will move things like\n // `src` or `controls` that were set via js before the player\n // was initialized.\n Object.keys(el).forEach(k => {\n try {\n tag[k] = el[k];\n } catch (e) {\n // we got a a property like outerHTML which we can't actually copy, ignore it\n }\n });\n }\n\n // set tabindex to -1 to remove the video element from the focus order\n tag.setAttribute('tabindex', '-1');\n attrs.tabindex = '-1';\n\n // Workaround for #4583 on Chrome (on Windows) with JAWS.\n // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n // Note that we can't detect if JAWS is being used, but this ARIA attribute\n // doesn't change behavior of Chrome if JAWS is not being used\n if (IS_CHROME && IS_WINDOWS) {\n tag.setAttribute('role', 'application');\n attrs.role = 'application';\n }\n\n // Remove width/height attrs from tag so CSS can make it 100% width/height\n tag.removeAttribute('width');\n tag.removeAttribute('height');\n if ('width' in attrs) {\n delete attrs.width;\n }\n if ('height' in attrs) {\n delete attrs.height;\n }\n Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n // don't copy over the class attribute to the player element when we're in a div embed\n // the class is already set up properly in the divEmbed case\n // and we want to make sure that the `video-js` class doesn't get lost\n if (!(divEmbed && attr === 'class')) {\n el.setAttribute(attr, attrs[attr]);\n }\n if (divEmbed) {\n tag.setAttribute(attr, attrs[attr]);\n }\n });\n\n // Update tag id/class for use as HTML5 playback tech\n // Might think we should do this after embedding in container so .vjs-tech class\n // doesn't flash 100% width/height, but class only applies with .video-js parent\n tag.playerId = tag.id;\n tag.id += '_html5_api';\n tag.className = 'vjs-tech';\n\n // Make player findable on elements\n tag.player = el.player = this;\n // Default state of video is paused\n this.addClass('vjs-paused');\n\n // Add a style element in the player that we'll use to set the width/height\n // of the player in a way that's still overridable by CSS, just like the\n // video element\n if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n const defaultsStyleEl = $('.vjs-styles-defaults');\n const head = $('head');\n head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n }\n this.fill_ = false;\n this.fluid_ = false;\n\n // Pass in the width/height/aspectRatio options which will update the style el\n this.width(this.options_.width);\n this.height(this.options_.height);\n this.fill(this.options_.fill);\n this.fluid(this.options_.fluid);\n this.aspectRatio(this.options_.aspectRatio);\n // support both crossOrigin and crossorigin to reduce confusion and issues around the name\n this.crossOrigin(this.options_.crossOrigin || this.options_.crossorigin);\n\n // Hide any links within the video/audio tag,\n // because IE doesn't hide them completely from screen readers.\n const links = tag.getElementsByTagName('a');\n for (let i = 0; i < links.length; i++) {\n const linkEl = links.item(i);\n addClass(linkEl, 'vjs-hidden');\n linkEl.setAttribute('hidden', 'hidden');\n }\n\n // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n // keep track of the original for later so we can know if the source originally failed\n tag.initNetworkState_ = tag.networkState;\n\n // Wrap video tag in div (el/box) container\n if (tag.parentNode && !playerElIngest) {\n tag.parentNode.insertBefore(el, tag);\n }\n\n // insert the tag as the first child of the player element\n // then manually add it to the children array so that this.addChild\n // will work properly for other components\n //\n // Breaks iPhone, fixed in HTML5 setup.\n prependTo(tag, el);\n this.children_.unshift(tag);\n\n // Set lang attr on player to ensure CSS :lang() in consistent with player\n // if it's been set to something different to the doc\n this.el_.setAttribute('lang', this.language_);\n this.el_.setAttribute('translate', 'no');\n this.el_ = el;\n return el;\n }\n\n /**\n * Get or set the `Player`'s crossOrigin option. For the HTML5 player, this\n * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n * behavior.\n *\n * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n *\n * @param {string|null} [value]\n * The value to set the `Player`'s crossOrigin to. If an argument is\n * given, must be one of `'anonymous'` or `'use-credentials'`, or 'null'.\n *\n * @return {string|null|undefined}\n * - The current crossOrigin value of the `Player` when getting.\n * - undefined when setting\n */\n crossOrigin(value) {\n // `null` can be set to unset a value\n if (typeof value === 'undefined') {\n return this.techGet_('crossOrigin');\n }\n if (value !== null && value !== 'anonymous' && value !== 'use-credentials') {\n log$1.warn(`crossOrigin must be null, \"anonymous\" or \"use-credentials\", given \"${value}\"`);\n return;\n }\n this.techCall_('setCrossOrigin', value);\n if (this.posterImage) {\n this.posterImage.crossOrigin(value);\n }\n return;\n }\n\n /**\n * A getter/setter for the `Player`'s width. Returns the player's configured value.\n * To get the current width use `currentWidth()`.\n *\n * @param {number} [value]\n * The value to set the `Player`'s width to.\n *\n * @return {number}\n * The current width of the `Player` when getting.\n */\n width(value) {\n return this.dimension('width', value);\n }\n\n /**\n * A getter/setter for the `Player`'s height. Returns the player's configured value.\n * To get the current height use `currentheight()`.\n *\n * @param {number} [value]\n * The value to set the `Player`'s height to.\n *\n * @return {number}\n * The current height of the `Player` when getting.\n */\n height(value) {\n return this.dimension('height', value);\n }\n\n /**\n * A getter/setter for the `Player`'s width & height.\n *\n * @param {string} dimension\n * This string can be:\n * - 'width'\n * - 'height'\n *\n * @param {number} [value]\n * Value for dimension specified in the first argument.\n *\n * @return {number}\n * The dimension arguments value when getting (width/height).\n */\n dimension(dimension, value) {\n const privDimension = dimension + '_';\n if (value === undefined) {\n return this[privDimension] || 0;\n }\n if (value === '' || value === 'auto') {\n // If an empty string is given, reset the dimension to be automatic\n this[privDimension] = undefined;\n this.updateStyleEl_();\n return;\n }\n const parsedVal = parseFloat(value);\n if (isNaN(parsedVal)) {\n log$1.error(`Improper value \"${value}\" supplied for for ${dimension}`);\n return;\n }\n this[privDimension] = parsedVal;\n this.updateStyleEl_();\n }\n\n /**\n * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n *\n * Turning this on will turn off fill mode.\n *\n * @param {boolean} [bool]\n * - A value of true adds the class.\n * - A value of false removes the class.\n * - No value will be a getter.\n *\n * @return {boolean|undefined}\n * - The value of fluid when getting.\n * - `undefined` when setting.\n */\n fluid(bool) {\n if (bool === undefined) {\n return !!this.fluid_;\n }\n this.fluid_ = !!bool;\n if (isEvented(this)) {\n this.off(['playerreset', 'resize'], this.boundUpdateStyleEl_);\n }\n if (bool) {\n this.addClass('vjs-fluid');\n this.fill(false);\n addEventedCallback(this, () => {\n this.on(['playerreset', 'resize'], this.boundUpdateStyleEl_);\n });\n } else {\n this.removeClass('vjs-fluid');\n }\n this.updateStyleEl_();\n }\n\n /**\n * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n *\n * Turning this on will turn off fluid mode.\n *\n * @param {boolean} [bool]\n * - A value of true adds the class.\n * - A value of false removes the class.\n * - No value will be a getter.\n *\n * @return {boolean|undefined}\n * - The value of fluid when getting.\n * - `undefined` when setting.\n */\n fill(bool) {\n if (bool === undefined) {\n return !!this.fill_;\n }\n this.fill_ = !!bool;\n if (bool) {\n this.addClass('vjs-fill');\n this.fluid(false);\n } else {\n this.removeClass('vjs-fill');\n }\n }\n\n /**\n * Get/Set the aspect ratio\n *\n * @param {string} [ratio]\n * Aspect ratio for player\n *\n * @return {string|undefined}\n * returns the current aspect ratio when getting\n */\n\n /**\n * A getter/setter for the `Player`'s aspect ratio.\n *\n * @param {string} [ratio]\n * The value to set the `Player`'s aspect ratio to.\n *\n * @return {string|undefined}\n * - The current aspect ratio of the `Player` when getting.\n * - undefined when setting\n */\n aspectRatio(ratio) {\n if (ratio === undefined) {\n return this.aspectRatio_;\n }\n\n // Check for width:height format\n if (!/^\\d+\\:\\d+$/.test(ratio)) {\n throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n }\n this.aspectRatio_ = ratio;\n\n // We're assuming if you set an aspect ratio you want fluid mode,\n // because in fixed mode you could calculate width and height yourself.\n this.fluid(true);\n this.updateStyleEl_();\n }\n\n /**\n * Update styles of the `Player` element (height, width and aspect ratio).\n *\n * @private\n * @listens Tech#loadedmetadata\n */\n updateStyleEl_() {\n if (window.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n const width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n const height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n const techEl = this.tech_ && this.tech_.el();\n if (techEl) {\n if (width >= 0) {\n techEl.width = width;\n }\n if (height >= 0) {\n techEl.height = height;\n }\n }\n return;\n }\n let width;\n let height;\n let aspectRatio;\n let idClass;\n\n // The aspect ratio is either used directly or to calculate width and height.\n if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n // Use any aspectRatio that's been specifically set\n aspectRatio = this.aspectRatio_;\n } else if (this.videoWidth() > 0) {\n // Otherwise try to get the aspect ratio from the video metadata\n aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n } else {\n // Or use a default. The video element's is 2:1, but 16:9 is more common.\n aspectRatio = '16:9';\n }\n\n // Get the ratio as a decimal we can use to calculate dimensions\n const ratioParts = aspectRatio.split(':');\n const ratioMultiplier = ratioParts[1] / ratioParts[0];\n if (this.width_ !== undefined) {\n // Use any width that's been specifically set\n width = this.width_;\n } else if (this.height_ !== undefined) {\n // Or calculate the width from the aspect ratio if a height has been set\n width = this.height_ / ratioMultiplier;\n } else {\n // Or use the video's metadata, or use the video el's default of 300\n width = this.videoWidth() || 300;\n }\n if (this.height_ !== undefined) {\n // Use any height that's been specifically set\n height = this.height_;\n } else {\n // Otherwise calculate the height from the ratio and the width\n height = width * ratioMultiplier;\n }\n\n // Ensure the CSS class is valid by starting with an alpha character\n if (/^[^a-zA-Z]/.test(this.id())) {\n idClass = 'dimensions-' + this.id();\n } else {\n idClass = this.id() + '-dimensions';\n }\n\n // Ensure the right class is still on the player for the style element\n this.addClass(idClass);\n setTextContent(this.styleEl_, `\n .${idClass} {\n width: ${width}px;\n height: ${height}px;\n }\n\n .${idClass}.vjs-fluid:not(.vjs-audio-only-mode) {\n padding-top: ${ratioMultiplier * 100}%;\n }\n `);\n }\n\n /**\n * Load/Create an instance of playback {@link Tech} including element\n * and API methods. Then append the `Tech` element in `Player` as a child.\n *\n * @param {string} techName\n * name of the playback technology\n *\n * @param {string} source\n * video source\n *\n * @private\n */\n loadTech_(techName, source) {\n // Pause and remove current playback technology\n if (this.tech_) {\n this.unloadTech_();\n }\n const titleTechName = toTitleCase$1(techName);\n const camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1);\n\n // get rid of the HTML5 video tag as soon as we are using another tech\n if (titleTechName !== 'Html5' && this.tag) {\n Tech.getTech('Html5').disposeMediaElement(this.tag);\n this.tag.player = null;\n this.tag = null;\n }\n this.techName_ = titleTechName;\n\n // Turn off API access because we're loading a new tech that might load asynchronously\n this.isReady_ = false;\n let autoplay = this.autoplay();\n\n // if autoplay is a string (or `true` with normalizeAutoplay: true) we pass false to the tech\n // because the player is going to handle autoplay on `loadstart`\n if (typeof this.autoplay() === 'string' || this.autoplay() === true && this.options_.normalizeAutoplay) {\n autoplay = false;\n }\n\n // Grab tech-specific options from player options and add source and parent element to use.\n const techOptions = {\n source,\n autoplay,\n 'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n 'playerId': this.id(),\n 'techId': `${this.id()}_${camelTechName}_api`,\n 'playsinline': this.options_.playsinline,\n 'preload': this.options_.preload,\n 'loop': this.options_.loop,\n 'disablePictureInPicture': this.options_.disablePictureInPicture,\n 'muted': this.options_.muted,\n 'poster': this.poster(),\n 'language': this.language(),\n 'playerElIngest': this.playerElIngest_ || false,\n 'vtt.js': this.options_['vtt.js'],\n 'canOverridePoster': !!this.options_.techCanOverridePoster,\n 'enableSourceset': this.options_.enableSourceset\n };\n ALL.names.forEach(name => {\n const props = ALL[name];\n techOptions[props.getterName] = this[props.privateName];\n });\n Object.assign(techOptions, this.options_[titleTechName]);\n Object.assign(techOptions, this.options_[camelTechName]);\n Object.assign(techOptions, this.options_[techName.toLowerCase()]);\n if (this.tag) {\n techOptions.tag = this.tag;\n }\n if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n techOptions.startTime = this.cache_.currentTime;\n }\n\n // Initialize tech instance\n const TechClass = Tech.getTech(techName);\n if (!TechClass) {\n throw new Error(`No Tech named '${titleTechName}' exists! '${titleTechName}' should be registered using videojs.registerTech()'`);\n }\n this.tech_ = new TechClass(techOptions);\n\n // player.triggerReady is always async, so don't need this to be async\n this.tech_.ready(bind_(this, this.handleTechReady_), true);\n textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_);\n\n // Listen to all HTML5-defined events and trigger them on the player\n TECH_EVENTS_RETRIGGER.forEach(event => {\n this.on(this.tech_, event, e => this[`handleTech${toTitleCase$1(event)}_`](e));\n });\n Object.keys(TECH_EVENTS_QUEUE).forEach(event => {\n this.on(this.tech_, event, eventObj => {\n if (this.tech_.playbackRate() === 0 && this.tech_.seeking()) {\n this.queuedCallbacks_.push({\n callback: this[`handleTech${TECH_EVENTS_QUEUE[event]}_`].bind(this),\n event: eventObj\n });\n return;\n }\n this[`handleTech${TECH_EVENTS_QUEUE[event]}_`](eventObj);\n });\n });\n this.on(this.tech_, 'loadstart', e => this.handleTechLoadStart_(e));\n this.on(this.tech_, 'sourceset', e => this.handleTechSourceset_(e));\n this.on(this.tech_, 'waiting', e => this.handleTechWaiting_(e));\n this.on(this.tech_, 'ended', e => this.handleTechEnded_(e));\n this.on(this.tech_, 'seeking', e => this.handleTechSeeking_(e));\n this.on(this.tech_, 'play', e => this.handleTechPlay_(e));\n this.on(this.tech_, 'pause', e => this.handleTechPause_(e));\n this.on(this.tech_, 'durationchange', e => this.handleTechDurationChange_(e));\n this.on(this.tech_, 'fullscreenchange', (e, data) => this.handleTechFullscreenChange_(e, data));\n this.on(this.tech_, 'fullscreenerror', (e, err) => this.handleTechFullscreenError_(e, err));\n this.on(this.tech_, 'enterpictureinpicture', e => this.handleTechEnterPictureInPicture_(e));\n this.on(this.tech_, 'leavepictureinpicture', e => this.handleTechLeavePictureInPicture_(e));\n this.on(this.tech_, 'error', e => this.handleTechError_(e));\n this.on(this.tech_, 'posterchange', e => this.handleTechPosterChange_(e));\n this.on(this.tech_, 'textdata', e => this.handleTechTextData_(e));\n this.on(this.tech_, 'ratechange', e => this.handleTechRateChange_(e));\n this.on(this.tech_, 'loadedmetadata', this.boundUpdateStyleEl_);\n this.usingNativeControls(this.techGet_('controls'));\n if (this.controls() && !this.usingNativeControls()) {\n this.addTechControlsListeners_();\n }\n\n // Add the tech element in the DOM if it was not already there\n // Make sure to not insert the original video element if using Html5\n if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n prependTo(this.tech_.el(), this.el());\n }\n\n // Get rid of the original video tag reference after the first tech is loaded\n if (this.tag) {\n this.tag.player = null;\n this.tag = null;\n }\n }\n\n /**\n * Unload and dispose of the current playback {@link Tech}.\n *\n * @private\n */\n unloadTech_() {\n // Save the current text tracks so that we can reuse the same text tracks with the next tech\n ALL.names.forEach(name => {\n const props = ALL[name];\n this[props.privateName] = this[props.getterName]();\n });\n this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n this.isReady_ = false;\n this.tech_.dispose();\n this.tech_ = false;\n if (this.isPosterFromTech_) {\n this.poster_ = '';\n this.trigger('posterchange');\n }\n this.isPosterFromTech_ = false;\n }\n\n /**\n * Return a reference to the current {@link Tech}.\n * It will print a warning by default about the danger of using the tech directly\n * but any argument that is passed in will silence the warning.\n *\n * @param {*} [safety]\n * Anything passed in to silence the warning\n *\n * @return {Tech}\n * The Tech\n */\n tech(safety) {\n if (safety === undefined) {\n log$1.warn('Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n' + 'See https://github.com/videojs/video.js/issues/2617 for more info.\\n');\n }\n return this.tech_;\n }\n\n /**\n * Set up click and touch listeners for the playback element\n *\n * - On desktops: a click on the video itself will toggle playback\n * - On mobile devices: a click on the video toggles controls\n * which is done by toggling the user state between active and\n * inactive\n * - A tap can signal that a user has become active or has become inactive\n * e.g. a quick tap on an iPhone movie should reveal the controls. Another\n * quick tap should hide them again (signaling the user is in an inactive\n * viewing state)\n * - In addition to this, we still want the user to be considered inactive after\n * a few seconds of inactivity.\n *\n * > Note: the only part of iOS interaction we can't mimic with this setup\n * is a touch and hold on the video element counting as activity in order to\n * keep the controls showing, but that shouldn't be an issue. A touch and hold\n * on any controls will still keep the user active\n *\n * @private\n */\n addTechControlsListeners_() {\n // Make sure to remove all the previous listeners in case we are called multiple times.\n this.removeTechControlsListeners_();\n this.on(this.tech_, 'click', this.boundHandleTechClick_);\n this.on(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);\n\n // If the controls were hidden we don't want that to change without a tap event\n // so we'll check if the controls were already showing before reporting user\n // activity\n this.on(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n this.on(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n this.on(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);\n\n // The tap listener needs to come after the touchend listener because the tap\n // listener cancels out any reportedUserActivity when setting userActive(false)\n this.on(this.tech_, 'tap', this.boundHandleTechTap_);\n }\n\n /**\n * Remove the listeners used for click and tap controls. This is needed for\n * toggling to controls disabled, where a tap/touch should do nothing.\n *\n * @private\n */\n removeTechControlsListeners_() {\n // We don't want to just use `this.off()` because there might be other needed\n // listeners added by techs that extend this.\n this.off(this.tech_, 'tap', this.boundHandleTechTap_);\n this.off(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n this.off(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n this.off(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);\n this.off(this.tech_, 'click', this.boundHandleTechClick_);\n this.off(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);\n }\n\n /**\n * Player waits for the tech to be ready\n *\n * @private\n */\n handleTechReady_() {\n this.triggerReady();\n\n // Keep the same volume as before\n if (this.cache_.volume) {\n this.techCall_('setVolume', this.cache_.volume);\n }\n\n // Look if the tech found a higher resolution poster while loading\n this.handleTechPosterChange_();\n\n // Update the duration if available\n this.handleTechDurationChange_();\n }\n\n /**\n * Retrigger the `loadstart` event that was triggered by the {@link Tech}.\n *\n * @fires Player#loadstart\n * @listens Tech#loadstart\n * @private\n */\n handleTechLoadStart_() {\n // TODO: Update to use `emptied` event instead. See #1277.\n\n this.removeClass('vjs-ended', 'vjs-seeking');\n\n // reset the error state\n this.error(null);\n\n // Update the duration\n this.handleTechDurationChange_();\n if (!this.paused()) {\n /**\n * Fired when the user agent begins looking for media data\n *\n * @event Player#loadstart\n * @type {Event}\n */\n this.trigger('loadstart');\n } else {\n // reset the hasStarted state\n this.hasStarted(false);\n this.trigger('loadstart');\n }\n\n // autoplay happens after loadstart for the browser,\n // so we mimic that behavior\n this.manualAutoplay_(this.autoplay() === true && this.options_.normalizeAutoplay ? 'play' : this.autoplay());\n }\n\n /**\n * Handle autoplay string values, rather than the typical boolean\n * values that should be handled by the tech. Note that this is not\n * part of any specification. Valid values and what they do can be\n * found on the autoplay getter at Player#autoplay()\n */\n manualAutoplay_(type) {\n if (!this.tech_ || typeof type !== 'string') {\n return;\n }\n\n // Save original muted() value, set muted to true, and attempt to play().\n // On promise rejection, restore muted from saved value\n const resolveMuted = () => {\n const previouslyMuted = this.muted();\n this.muted(true);\n const restoreMuted = () => {\n this.muted(previouslyMuted);\n };\n\n // restore muted on play terminatation\n this.playTerminatedQueue_.push(restoreMuted);\n const mutedPromise = this.play();\n if (!isPromise(mutedPromise)) {\n return;\n }\n return mutedPromise.catch(err => {\n restoreMuted();\n throw new Error(`Rejection at manualAutoplay. Restoring muted value. ${err ? err : ''}`);\n });\n };\n let promise;\n\n // if muted defaults to true\n // the only thing we can do is call play\n if (type === 'any' && !this.muted()) {\n promise = this.play();\n if (isPromise(promise)) {\n promise = promise.catch(resolveMuted);\n }\n } else if (type === 'muted' && !this.muted()) {\n promise = resolveMuted();\n } else {\n promise = this.play();\n }\n if (!isPromise(promise)) {\n return;\n }\n return promise.then(() => {\n this.trigger({\n type: 'autoplay-success',\n autoplay: type\n });\n }).catch(() => {\n this.trigger({\n type: 'autoplay-failure',\n autoplay: type\n });\n });\n }\n\n /**\n * Update the internal source caches so that we return the correct source from\n * `src()`, `currentSource()`, and `currentSources()`.\n *\n * > Note: `currentSources` will not be updated if the source that is passed in exists\n * in the current `currentSources` cache.\n *\n *\n * @param {Tech~SourceObject} srcObj\n * A string or object source to update our caches to.\n */\n updateSourceCaches_(srcObj = '') {\n let src = srcObj;\n let type = '';\n if (typeof src !== 'string') {\n src = srcObj.src;\n type = srcObj.type;\n }\n\n // make sure all the caches are set to default values\n // to prevent null checking\n this.cache_.source = this.cache_.source || {};\n this.cache_.sources = this.cache_.sources || [];\n\n // try to get the type of the src that was passed in\n if (src && !type) {\n type = findMimetype(this, src);\n }\n\n // update `currentSource` cache always\n this.cache_.source = merge$2({}, srcObj, {\n src,\n type\n });\n const matchingSources = this.cache_.sources.filter(s => s.src && s.src === src);\n const sourceElSources = [];\n const sourceEls = this.$$('source');\n const matchingSourceEls = [];\n for (let i = 0; i < sourceEls.length; i++) {\n const sourceObj = getAttributes(sourceEls[i]);\n sourceElSources.push(sourceObj);\n if (sourceObj.src && sourceObj.src === src) {\n matchingSourceEls.push(sourceObj.src);\n }\n }\n\n // if we have matching source els but not matching sources\n // the current source cache is not up to date\n if (matchingSourceEls.length && !matchingSources.length) {\n this.cache_.sources = sourceElSources;\n // if we don't have matching source or source els set the\n // sources cache to the `currentSource` cache\n } else if (!matchingSources.length) {\n this.cache_.sources = [this.cache_.source];\n }\n\n // update the tech `src` cache\n this.cache_.src = src;\n }\n\n /**\n * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n * causing the media element to reload.\n *\n * It will fire for the initial source and each subsequent source.\n * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n *\n * The event object for this event contains a `src` property that will contain the source\n * that was available when the event was triggered. This is generally only necessary if Video.js\n * is switching techs while the source was being changed.\n *\n * It is also fired when `load` is called on the player (or media element)\n * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n * says that the resource selection algorithm needs to be aborted and restarted.\n * In this case, it is very likely that the `src` property will be set to the\n * empty string `\"\"` to indicate we do not know what the source will be but\n * that it is changing.\n *\n * *This event is currently still experimental and may change in minor releases.*\n * __To use this, pass `enableSourceset` option to the player.__\n *\n * @event Player#sourceset\n * @type {Event}\n * @prop {string} src\n * The source url available when the `sourceset` was triggered.\n * It will be an empty string if we cannot know what the source is\n * but know that the source will change.\n */\n /**\n * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n *\n * @fires Player#sourceset\n * @listens Tech#sourceset\n * @private\n */\n handleTechSourceset_(event) {\n // only update the source cache when the source\n // was not updated using the player api\n if (!this.changingSrc_) {\n let updateSourceCaches = src => this.updateSourceCaches_(src);\n const playerSrc = this.currentSource().src;\n const eventSrc = event.src;\n\n // if we have a playerSrc that is not a blob, and a tech src that is a blob\n if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n // if both the tech source and the player source were updated we assume\n // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n updateSourceCaches = () => {};\n }\n }\n\n // update the source to the initial source right away\n // in some cases this will be empty string\n updateSourceCaches(eventSrc);\n\n // if the `sourceset` `src` was an empty string\n // wait for a `loadstart` to update the cache to `currentSrc`.\n // If a sourceset happens before a `loadstart`, we reset the state\n if (!event.src) {\n this.tech_.any(['sourceset', 'loadstart'], e => {\n // if a sourceset happens before a `loadstart` there\n // is nothing to do as this `handleTechSourceset_`\n // will be called again and this will be handled there.\n if (e.type === 'sourceset') {\n return;\n }\n const techSrc = this.techGet('currentSrc');\n this.lastSource_.tech = techSrc;\n this.updateSourceCaches_(techSrc);\n });\n }\n }\n this.lastSource_ = {\n player: this.currentSource().src,\n tech: event.src\n };\n this.trigger({\n src: event.src,\n type: 'sourceset'\n });\n }\n\n /**\n * Add/remove the vjs-has-started class\n *\n *\n * @param {boolean} request\n * - true: adds the class\n * - false: remove the class\n *\n * @return {boolean}\n * the boolean value of hasStarted_\n */\n hasStarted(request) {\n if (request === undefined) {\n // act as getter, if we have no request to change\n return this.hasStarted_;\n }\n if (request === this.hasStarted_) {\n return;\n }\n this.hasStarted_ = request;\n if (this.hasStarted_) {\n this.addClass('vjs-has-started');\n } else {\n this.removeClass('vjs-has-started');\n }\n }\n\n /**\n * Fired whenever the media begins or resumes playback\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n * @fires Player#play\n * @listens Tech#play\n * @private\n */\n handleTechPlay_() {\n this.removeClass('vjs-ended', 'vjs-paused');\n this.addClass('vjs-playing');\n\n // hide the poster when the user hits play\n this.hasStarted(true);\n /**\n * Triggered whenever an {@link Tech#play} event happens. Indicates that\n * playback has started or resumed.\n *\n * @event Player#play\n * @type {Event}\n */\n this.trigger('play');\n }\n\n /**\n * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n *\n * If there were any events queued while the playback rate was zero, fire\n * those events now.\n *\n * @private\n * @method Player#handleTechRateChange_\n * @fires Player#ratechange\n * @listens Tech#ratechange\n */\n handleTechRateChange_() {\n if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n this.queuedCallbacks_.forEach(queued => queued.callback(queued.event));\n this.queuedCallbacks_ = [];\n }\n this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n /**\n * Fires when the playing speed of the audio/video is changed\n *\n * @event Player#ratechange\n * @type {event}\n */\n this.trigger('ratechange');\n }\n\n /**\n * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n *\n * @fires Player#waiting\n * @listens Tech#waiting\n * @private\n */\n handleTechWaiting_() {\n this.addClass('vjs-waiting');\n /**\n * A readyState change on the DOM element has caused playback to stop.\n *\n * @event Player#waiting\n * @type {Event}\n */\n this.trigger('waiting');\n\n // Browsers may emit a timeupdate event after a waiting event. In order to prevent\n // premature removal of the waiting class, wait for the time to change.\n const timeWhenWaiting = this.currentTime();\n const timeUpdateListener = () => {\n if (timeWhenWaiting !== this.currentTime()) {\n this.removeClass('vjs-waiting');\n this.off('timeupdate', timeUpdateListener);\n }\n };\n this.on('timeupdate', timeUpdateListener);\n }\n\n /**\n * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n * > Note: This is not consistent between browsers. See #1351\n *\n * @fires Player#canplay\n * @listens Tech#canplay\n * @private\n */\n handleTechCanPlay_() {\n this.removeClass('vjs-waiting');\n /**\n * The media has a readyState of HAVE_FUTURE_DATA or greater.\n *\n * @event Player#canplay\n * @type {Event}\n */\n this.trigger('canplay');\n }\n\n /**\n * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n *\n * @fires Player#canplaythrough\n * @listens Tech#canplaythrough\n * @private\n */\n handleTechCanPlayThrough_() {\n this.removeClass('vjs-waiting');\n /**\n * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n * entire media file can be played without buffering.\n *\n * @event Player#canplaythrough\n * @type {Event}\n */\n this.trigger('canplaythrough');\n }\n\n /**\n * Retrigger the `playing` event that was triggered by the {@link Tech}.\n *\n * @fires Player#playing\n * @listens Tech#playing\n * @private\n */\n handleTechPlaying_() {\n this.removeClass('vjs-waiting');\n /**\n * The media is no longer blocked from playback, and has started playing.\n *\n * @event Player#playing\n * @type {Event}\n */\n this.trigger('playing');\n }\n\n /**\n * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n *\n * @fires Player#seeking\n * @listens Tech#seeking\n * @private\n */\n handleTechSeeking_() {\n this.addClass('vjs-seeking');\n /**\n * Fired whenever the player is jumping to a new time\n *\n * @event Player#seeking\n * @type {Event}\n */\n this.trigger('seeking');\n }\n\n /**\n * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n *\n * @fires Player#seeked\n * @listens Tech#seeked\n * @private\n */\n handleTechSeeked_() {\n this.removeClass('vjs-seeking', 'vjs-ended');\n /**\n * Fired when the player has finished jumping to a new time\n *\n * @event Player#seeked\n * @type {Event}\n */\n this.trigger('seeked');\n }\n\n /**\n * Retrigger the `pause` event that was triggered by the {@link Tech}.\n *\n * @fires Player#pause\n * @listens Tech#pause\n * @private\n */\n handleTechPause_() {\n this.removeClass('vjs-playing');\n this.addClass('vjs-paused');\n /**\n * Fired whenever the media has been paused\n *\n * @event Player#pause\n * @type {Event}\n */\n this.trigger('pause');\n }\n\n /**\n * Retrigger the `ended` event that was triggered by the {@link Tech}.\n *\n * @fires Player#ended\n * @listens Tech#ended\n * @private\n */\n handleTechEnded_() {\n this.addClass('vjs-ended');\n this.removeClass('vjs-waiting');\n if (this.options_.loop) {\n this.currentTime(0);\n this.play();\n } else if (!this.paused()) {\n this.pause();\n }\n\n /**\n * Fired when the end of the media resource is reached (currentTime == duration)\n *\n * @event Player#ended\n * @type {Event}\n */\n this.trigger('ended');\n }\n\n /**\n * Fired when the duration of the media resource is first known or changed\n *\n * @listens Tech#durationchange\n * @private\n */\n handleTechDurationChange_() {\n this.duration(this.techGet_('duration'));\n }\n\n /**\n * Handle a click on the media element to play/pause\n *\n * @param {Event} event\n * the event that caused this function to trigger\n *\n * @listens Tech#click\n * @private\n */\n handleTechClick_(event) {\n // When controls are disabled a click should not toggle playback because\n // the click is considered a control\n if (!this.controls_) {\n return;\n }\n if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.click === undefined || this.options_.userActions.click !== false) {\n if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.click === 'function') {\n this.options_.userActions.click.call(this, event);\n } else if (this.paused()) {\n silencePromise(this.play());\n } else {\n this.pause();\n }\n }\n }\n\n /**\n * Handle a double-click on the media element to enter/exit fullscreen\n *\n * @param {Event} event\n * the event that caused this function to trigger\n *\n * @listens Tech#dblclick\n * @private\n */\n handleTechDoubleClick_(event) {\n if (!this.controls_) {\n return;\n }\n\n // we do not want to toggle fullscreen state\n // when double-clicking inside a control bar or a modal\n const inAllowedEls = Array.prototype.some.call(this.$$('.vjs-control-bar, .vjs-modal-dialog'), el => el.contains(event.target));\n if (!inAllowedEls) {\n /*\n * options.userActions.doubleClick\n *\n * If `undefined` or `true`, double-click toggles fullscreen if controls are present\n * Set to `false` to disable double-click handling\n * Set to a function to substitute an external double-click handler\n */\n if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.doubleClick === undefined || this.options_.userActions.doubleClick !== false) {\n if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.doubleClick === 'function') {\n this.options_.userActions.doubleClick.call(this, event);\n } else if (this.isFullscreen()) {\n this.exitFullscreen();\n } else {\n this.requestFullscreen();\n }\n }\n }\n }\n\n /**\n * Handle a tap on the media element. It will toggle the user\n * activity state, which hides and shows the controls.\n *\n * @listens Tech#tap\n * @private\n */\n handleTechTap_() {\n this.userActive(!this.userActive());\n }\n\n /**\n * Handle touch to start\n *\n * @listens Tech#touchstart\n * @private\n */\n handleTechTouchStart_() {\n this.userWasActive = this.userActive();\n }\n\n /**\n * Handle touch to move\n *\n * @listens Tech#touchmove\n * @private\n */\n handleTechTouchMove_() {\n if (this.userWasActive) {\n this.reportUserActivity();\n }\n }\n\n /**\n * Handle touch to end\n *\n * @param {Event} event\n * the touchend event that triggered\n * this function\n *\n * @listens Tech#touchend\n * @private\n */\n handleTechTouchEnd_(event) {\n // Stop the mouse events from also happening\n if (event.cancelable) {\n event.preventDefault();\n }\n }\n\n /**\n * @private\n */\n toggleFullscreenClass_() {\n if (this.isFullscreen()) {\n this.addClass('vjs-fullscreen');\n } else {\n this.removeClass('vjs-fullscreen');\n }\n }\n\n /**\n * when the document fschange event triggers it calls this\n */\n documentFullscreenChange_(e) {\n const targetPlayer = e.target.player;\n\n // if another player was fullscreen\n // do a null check for targetPlayer because older firefox's would put document as e.target\n if (targetPlayer && targetPlayer !== this) {\n return;\n }\n const el = this.el();\n let isFs = document[this.fsApi_.fullscreenElement] === el;\n if (!isFs && el.matches) {\n isFs = el.matches(':' + this.fsApi_.fullscreen);\n } else if (!isFs && el.msMatchesSelector) {\n isFs = el.msMatchesSelector(':' + this.fsApi_.fullscreen);\n }\n this.isFullscreen(isFs);\n }\n\n /**\n * Handle Tech Fullscreen Change\n *\n * @param {Event} event\n * the fullscreenchange event that triggered this function\n *\n * @param {Object} data\n * the data that was sent with the event\n *\n * @private\n * @listens Tech#fullscreenchange\n * @fires Player#fullscreenchange\n */\n handleTechFullscreenChange_(event, data) {\n if (data) {\n if (data.nativeIOSFullscreen) {\n this.addClass('vjs-ios-native-fs');\n this.tech_.one('webkitendfullscreen', () => {\n this.removeClass('vjs-ios-native-fs');\n });\n }\n this.isFullscreen(data.isFullscreen);\n }\n }\n handleTechFullscreenError_(event, err) {\n this.trigger('fullscreenerror', err);\n }\n\n /**\n * @private\n */\n togglePictureInPictureClass_() {\n if (this.isInPictureInPicture()) {\n this.addClass('vjs-picture-in-picture');\n } else {\n this.removeClass('vjs-picture-in-picture');\n }\n }\n\n /**\n * Handle Tech Enter Picture-in-Picture.\n *\n * @param {Event} event\n * the enterpictureinpicture event that triggered this function\n *\n * @private\n * @listens Tech#enterpictureinpicture\n */\n handleTechEnterPictureInPicture_(event) {\n this.isInPictureInPicture(true);\n }\n\n /**\n * Handle Tech Leave Picture-in-Picture.\n *\n * @param {Event} event\n * the leavepictureinpicture event that triggered this function\n *\n * @private\n * @listens Tech#leavepictureinpicture\n */\n handleTechLeavePictureInPicture_(event) {\n this.isInPictureInPicture(false);\n }\n\n /**\n * Fires when an error occurred during the loading of an audio/video.\n *\n * @private\n * @listens Tech#error\n */\n handleTechError_() {\n const error = this.tech_.error();\n this.error(error);\n }\n\n /**\n * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n *\n * @fires Player#textdata\n * @listens Tech#textdata\n * @private\n */\n handleTechTextData_() {\n let data = null;\n if (arguments.length > 1) {\n data = arguments[1];\n }\n\n /**\n * Fires when we get a textdata event from tech\n *\n * @event Player#textdata\n * @type {Event}\n */\n this.trigger('textdata', data);\n }\n\n /**\n * Get object for cached values.\n *\n * @return {Object}\n * get the current object cache\n */\n getCache() {\n return this.cache_;\n }\n\n /**\n * Resets the internal cache object.\n *\n * Using this function outside the player constructor or reset method may\n * have unintended side-effects.\n *\n * @private\n */\n resetCache_() {\n this.cache_ = {\n // Right now, the currentTime is not _really_ cached because it is always\n // retrieved from the tech (see: currentTime). However, for completeness,\n // we set it to zero here to ensure that if we do start actually caching\n // it, we reset it along with everything else.\n currentTime: 0,\n initTime: 0,\n inactivityTimeout: this.options_.inactivityTimeout,\n duration: NaN,\n lastVolume: 1,\n lastPlaybackRate: this.defaultPlaybackRate(),\n media: null,\n src: '',\n source: {},\n sources: [],\n playbackRates: [],\n volume: 1\n };\n }\n\n /**\n * Pass values to the playback tech\n *\n * @param {string} [method]\n * the method to call\n *\n * @param {Object} arg\n * the argument to pass\n *\n * @private\n */\n techCall_(method, arg) {\n // If it's not ready yet, call method when it is\n\n this.ready(function () {\n if (method in allowedSetters) {\n return set(this.middleware_, this.tech_, method, arg);\n } else if (method in allowedMediators) {\n return mediate(this.middleware_, this.tech_, method, arg);\n }\n try {\n if (this.tech_) {\n this.tech_[method](arg);\n }\n } catch (e) {\n log$1(e);\n throw e;\n }\n }, true);\n }\n\n /**\n * Mediate attempt to call playback tech method\n * and return the value of the method called.\n *\n * @param {string} method\n * Tech method\n *\n * @return {*}\n * Value returned by the tech method called, undefined if tech\n * is not ready or tech method is not present\n *\n * @private\n */\n techGet_(method) {\n if (!this.tech_ || !this.tech_.isReady_) {\n return;\n }\n if (method in allowedGetters) {\n return get(this.middleware_, this.tech_, method);\n } else if (method in allowedMediators) {\n return mediate(this.middleware_, this.tech_, method);\n }\n\n // Log error when playback tech object is present but method\n // is undefined or unavailable\n try {\n return this.tech_[method]();\n } catch (e) {\n // When building additional tech libs, an expected method may not be defined yet\n if (this.tech_[method] === undefined) {\n log$1(`Video.js: ${method} method not defined for ${this.techName_} playback technology.`, e);\n throw e;\n }\n\n // When a method isn't available on the object it throws a TypeError\n if (e.name === 'TypeError') {\n log$1(`Video.js: ${method} unavailable on ${this.techName_} playback technology element.`, e);\n this.tech_.isReady_ = false;\n throw e;\n }\n\n // If error unknown, just log and throw\n log$1(e);\n throw e;\n }\n }\n\n /**\n * Attempt to begin playback at the first opportunity.\n *\n * @return {Promise|undefined}\n * Returns a promise if the browser supports Promises (or one\n * was passed in as an option). This promise will be resolved on\n * the return value of play. If this is undefined it will fulfill the\n * promise chain otherwise the promise chain will be fulfilled when\n * the promise from play is fulfilled.\n */\n play() {\n return new Promise(resolve => {\n this.play_(resolve);\n });\n }\n\n /**\n * The actual logic for play, takes a callback that will be resolved on the\n * return value of play. This allows us to resolve to the play promise if there\n * is one on modern browsers.\n *\n * @private\n * @param {Function} [callback]\n * The callback that should be called when the techs play is actually called\n */\n play_(callback = silencePromise) {\n this.playCallbacks_.push(callback);\n const isSrcReady = Boolean(!this.changingSrc_ && (this.src() || this.currentSrc()));\n const isSafariOrIOS = Boolean(IS_ANY_SAFARI || IS_IOS);\n\n // treat calls to play_ somewhat like the `one` event function\n if (this.waitToPlay_) {\n this.off(['ready', 'loadstart'], this.waitToPlay_);\n this.waitToPlay_ = null;\n }\n\n // if the player/tech is not ready or the src itself is not ready\n // queue up a call to play on `ready` or `loadstart`\n if (!this.isReady_ || !isSrcReady) {\n this.waitToPlay_ = e => {\n this.play_();\n };\n this.one(['ready', 'loadstart'], this.waitToPlay_);\n\n // if we are in Safari, there is a high chance that loadstart will trigger after the gesture timeperiod\n // in that case, we need to prime the video element by calling load so it'll be ready in time\n if (!isSrcReady && isSafariOrIOS) {\n this.load();\n }\n return;\n }\n\n // If the player/tech is ready and we have a source, we can attempt playback.\n const val = this.techGet_('play');\n\n // For native playback, reset the progress bar if we get a play call from a replay.\n const isNativeReplay = isSafariOrIOS && this.hasClass('vjs-ended');\n if (isNativeReplay) {\n this.resetProgressBar_();\n }\n // play was terminated if the returned value is null\n if (val === null) {\n this.runPlayTerminatedQueue_();\n } else {\n this.runPlayCallbacks_(val);\n }\n }\n\n /**\n * These functions will be run when if play is terminated. If play\n * runPlayCallbacks_ is run these function will not be run. This allows us\n * to differentiate between a terminated play and an actual call to play.\n */\n runPlayTerminatedQueue_() {\n const queue = this.playTerminatedQueue_.slice(0);\n this.playTerminatedQueue_ = [];\n queue.forEach(function (q) {\n q();\n });\n }\n\n /**\n * When a callback to play is delayed we have to run these\n * callbacks when play is actually called on the tech. This function\n * runs the callbacks that were delayed and accepts the return value\n * from the tech.\n *\n * @param {undefined|Promise} val\n * The return value from the tech.\n */\n runPlayCallbacks_(val) {\n const callbacks = this.playCallbacks_.slice(0);\n this.playCallbacks_ = [];\n // clear play terminatedQueue since we finished a real play\n this.playTerminatedQueue_ = [];\n callbacks.forEach(function (cb) {\n cb(val);\n });\n }\n\n /**\n * Pause the video playback\n *\n * @return {Player}\n * A reference to the player object this function was called on\n */\n pause() {\n this.techCall_('pause');\n }\n\n /**\n * Check if the player is paused or has yet to play\n *\n * @return {boolean}\n * - false: if the media is currently playing\n * - true: if media is not currently playing\n */\n paused() {\n // The initial state of paused should be true (in Safari it's actually false)\n return this.techGet_('paused') === false ? false : true;\n }\n\n /**\n * Get a TimeRange object representing the current ranges of time that the user\n * has played.\n *\n * @return { import('./utils/time').TimeRange }\n * A time range object that represents all the increments of time that have\n * been played.\n */\n played() {\n return this.techGet_('played') || createTimeRanges$1(0, 0);\n }\n\n /**\n * Returns whether or not the user is \"scrubbing\". Scrubbing is\n * when the user has clicked the progress bar handle and is\n * dragging it along the progress bar.\n *\n * @param {boolean} [isScrubbing]\n * whether the user is or is not scrubbing\n *\n * @return {boolean}\n * The value of scrubbing when getting\n */\n scrubbing(isScrubbing) {\n if (typeof isScrubbing === 'undefined') {\n return this.scrubbing_;\n }\n this.scrubbing_ = !!isScrubbing;\n this.techCall_('setScrubbing', this.scrubbing_);\n if (isScrubbing) {\n this.addClass('vjs-scrubbing');\n } else {\n this.removeClass('vjs-scrubbing');\n }\n }\n\n /**\n * Get or set the current time (in seconds)\n *\n * @param {number|string} [seconds]\n * The time to seek to in seconds\n *\n * @return {number}\n * - the current time in seconds when getting\n */\n currentTime(seconds) {\n if (typeof seconds !== 'undefined') {\n if (seconds < 0) {\n seconds = 0;\n }\n if (!this.isReady_ || this.changingSrc_ || !this.tech_ || !this.tech_.isReady_) {\n this.cache_.initTime = seconds;\n this.off('canplay', this.boundApplyInitTime_);\n this.one('canplay', this.boundApplyInitTime_);\n return;\n }\n this.techCall_('setCurrentTime', seconds);\n this.cache_.initTime = 0;\n return;\n }\n\n // cache last currentTime and return. default to 0 seconds\n //\n // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n // currentTime when scrubbing, but may not provide much performance benefit after all.\n // Should be tested. Also something has to read the actual current time or the cache will\n // never get updated.\n this.cache_.currentTime = this.techGet_('currentTime') || 0;\n return this.cache_.currentTime;\n }\n\n /**\n * Apply the value of initTime stored in cache as currentTime.\n *\n * @private\n */\n applyInitTime_() {\n this.currentTime(this.cache_.initTime);\n }\n\n /**\n * Normally gets the length in time of the video in seconds;\n * in all but the rarest use cases an argument will NOT be passed to the method\n *\n * > **NOTE**: The video must have started loading before the duration can be\n * known, and depending on preload behaviour may not be known until the video starts\n * playing.\n *\n * @fires Player#durationchange\n *\n * @param {number} [seconds]\n * The duration of the video to set in seconds\n *\n * @return {number}\n * - The duration of the video in seconds when getting\n */\n duration(seconds) {\n if (seconds === undefined) {\n // return NaN if the duration is not known\n return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n }\n seconds = parseFloat(seconds);\n\n // Standardize on Infinity for signaling video is live\n if (seconds < 0) {\n seconds = Infinity;\n }\n if (seconds !== this.cache_.duration) {\n // Cache the last set value for optimized scrubbing\n this.cache_.duration = seconds;\n if (seconds === Infinity) {\n this.addClass('vjs-live');\n } else {\n this.removeClass('vjs-live');\n }\n if (!isNaN(seconds)) {\n // Do not fire durationchange unless the duration value is known.\n // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n /**\n * @event Player#durationchange\n * @type {Event}\n */\n this.trigger('durationchange');\n }\n }\n }\n\n /**\n * Calculates how much time is left in the video. Not part\n * of the native video API.\n *\n * @return {number}\n * The time remaining in seconds\n */\n remainingTime() {\n return this.duration() - this.currentTime();\n }\n\n /**\n * A remaining time function that is intended to be used when\n * the time is to be displayed directly to the user.\n *\n * @return {number}\n * The rounded time remaining in seconds\n */\n remainingTimeDisplay() {\n return Math.floor(this.duration()) - Math.floor(this.currentTime());\n }\n\n //\n // Kind of like an array of portions of the video that have been downloaded.\n\n /**\n * Get a TimeRange object with an array of the times of the video\n * that have been downloaded. If you just want the percent of the\n * video that's been downloaded, use bufferedPercent.\n *\n * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n *\n * @return { import('./utils/time').TimeRange }\n * A mock {@link TimeRanges} object (following HTML spec)\n */\n buffered() {\n let buffered = this.techGet_('buffered');\n if (!buffered || !buffered.length) {\n buffered = createTimeRanges$1(0, 0);\n }\n return buffered;\n }\n\n /**\n * Get the percent (as a decimal) of the video that's been downloaded.\n * This method is not a part of the native HTML video API.\n *\n * @return {number}\n * A decimal between 0 and 1 representing the percent\n * that is buffered 0 being 0% and 1 being 100%\n */\n bufferedPercent() {\n return bufferedPercent(this.buffered(), this.duration());\n }\n\n /**\n * Get the ending time of the last buffered time range\n * This is used in the progress bar to encapsulate all time ranges.\n *\n * @return {number}\n * The end of the last buffered time range\n */\n bufferedEnd() {\n const buffered = this.buffered();\n const duration = this.duration();\n let end = buffered.end(buffered.length - 1);\n if (end > duration) {\n end = duration;\n }\n return end;\n }\n\n /**\n * Get or set the current volume of the media\n *\n * @param {number} [percentAsDecimal]\n * The new volume as a decimal percent:\n * - 0 is muted/0%/off\n * - 1.0 is 100%/full\n * - 0.5 is half volume or 50%\n *\n * @return {number}\n * The current volume as a percent when getting\n */\n volume(percentAsDecimal) {\n let vol;\n if (percentAsDecimal !== undefined) {\n // Force value to between 0 and 1\n vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n this.cache_.volume = vol;\n this.techCall_('setVolume', vol);\n if (vol > 0) {\n this.lastVolume_(vol);\n }\n return;\n }\n\n // Default to 1 when returning current volume.\n vol = parseFloat(this.techGet_('volume'));\n return isNaN(vol) ? 1 : vol;\n }\n\n /**\n * Get the current muted state, or turn mute on or off\n *\n * @param {boolean} [muted]\n * - true to mute\n * - false to unmute\n *\n * @return {boolean}\n * - true if mute is on and getting\n * - false if mute is off and getting\n */\n muted(muted) {\n if (muted !== undefined) {\n this.techCall_('setMuted', muted);\n return;\n }\n return this.techGet_('muted') || false;\n }\n\n /**\n * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n * indicates the state of muted on initial playback.\n *\n * ```js\n * var myPlayer = videojs('some-player-id');\n *\n * myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n *\n * // get, should be false\n * console.log(myPlayer.defaultMuted());\n * // set to true\n * myPlayer.defaultMuted(true);\n * // get should be true\n * console.log(myPlayer.defaultMuted());\n * ```\n *\n * @param {boolean} [defaultMuted]\n * - true to mute\n * - false to unmute\n *\n * @return {boolean|Player}\n * - true if defaultMuted is on and getting\n * - false if defaultMuted is off and getting\n * - A reference to the current player when setting\n */\n defaultMuted(defaultMuted) {\n if (defaultMuted !== undefined) {\n return this.techCall_('setDefaultMuted', defaultMuted);\n }\n return this.techGet_('defaultMuted') || false;\n }\n\n /**\n * Get the last volume, or set it\n *\n * @param {number} [percentAsDecimal]\n * The new last volume as a decimal percent:\n * - 0 is muted/0%/off\n * - 1.0 is 100%/full\n * - 0.5 is half volume or 50%\n *\n * @return {number}\n * the current value of lastVolume as a percent when getting\n *\n * @private\n */\n lastVolume_(percentAsDecimal) {\n if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n this.cache_.lastVolume = percentAsDecimal;\n return;\n }\n return this.cache_.lastVolume;\n }\n\n /**\n * Check if current tech can support native fullscreen\n * (e.g. with built in controls like iOS)\n *\n * @return {boolean}\n * if native fullscreen is supported\n */\n supportsFullScreen() {\n return this.techGet_('supportsFullScreen') || false;\n }\n\n /**\n * Check if the player is in fullscreen mode or tell the player that it\n * is or is not in fullscreen mode.\n *\n * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n * property and instead document.fullscreenElement is used. But isFullscreen is\n * still a valuable property for internal player workings.\n *\n * @param {boolean} [isFS]\n * Set the players current fullscreen state\n *\n * @return {boolean}\n * - true if fullscreen is on and getting\n * - false if fullscreen is off and getting\n */\n isFullscreen(isFS) {\n if (isFS !== undefined) {\n const oldValue = this.isFullscreen_;\n this.isFullscreen_ = Boolean(isFS);\n\n // if we changed fullscreen state and we're in prefixed mode, trigger fullscreenchange\n // this is the only place where we trigger fullscreenchange events for older browsers\n // fullWindow mode is treated as a prefixed event and will get a fullscreenchange event as well\n if (this.isFullscreen_ !== oldValue && this.fsApi_.prefixed) {\n /**\n * @event Player#fullscreenchange\n * @type {Event}\n */\n this.trigger('fullscreenchange');\n }\n this.toggleFullscreenClass_();\n return;\n }\n return this.isFullscreen_;\n }\n\n /**\n * Increase the size of the video to full screen\n * In some browsers, full screen is not supported natively, so it enters\n * \"full window mode\", where the video fills the browser window.\n * In browsers and devices that support native full screen, sometimes the\n * browser's default controls will be shown, and not the Video.js custom skin.\n * This includes most mobile devices (iOS, Android) and older versions of\n * Safari.\n *\n * @param {Object} [fullscreenOptions]\n * Override the player fullscreen options\n *\n * @fires Player#fullscreenchange\n */\n requestFullscreen(fullscreenOptions) {\n if (this.isInPictureInPicture()) {\n this.exitPictureInPicture();\n }\n const self = this;\n return new Promise((resolve, reject) => {\n function offHandler() {\n self.off('fullscreenerror', errorHandler);\n self.off('fullscreenchange', changeHandler);\n }\n function changeHandler() {\n offHandler();\n resolve();\n }\n function errorHandler(e, err) {\n offHandler();\n reject(err);\n }\n self.one('fullscreenchange', changeHandler);\n self.one('fullscreenerror', errorHandler);\n const promise = self.requestFullscreenHelper_(fullscreenOptions);\n if (promise) {\n promise.then(offHandler, offHandler);\n promise.then(resolve, reject);\n }\n });\n }\n requestFullscreenHelper_(fullscreenOptions) {\n let fsOptions;\n\n // Only pass fullscreen options to requestFullscreen in spec-compliant browsers.\n // Use defaults or player configured option unless passed directly to this method.\n if (!this.fsApi_.prefixed) {\n fsOptions = this.options_.fullscreen && this.options_.fullscreen.options || {};\n if (fullscreenOptions !== undefined) {\n fsOptions = fullscreenOptions;\n }\n }\n\n // This method works as follows:\n // 1. if a fullscreen api is available, use it\n // 1. call requestFullscreen with potential options\n // 2. if we got a promise from above, use it to update isFullscreen()\n // 2. otherwise, if the tech supports fullscreen, call `enterFullScreen` on it.\n // This is particularly used for iPhone, older iPads, and non-safari browser on iOS.\n // 3. otherwise, use \"fullWindow\" mode\n if (this.fsApi_.requestFullscreen) {\n const promise = this.el_[this.fsApi_.requestFullscreen](fsOptions);\n\n // Even on browsers with promise support this may not return a promise\n if (promise) {\n promise.then(() => this.isFullscreen(true), () => this.isFullscreen(false));\n }\n return promise;\n } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n // we can't take the video.js controls fullscreen but we can go fullscreen\n // with native controls\n this.techCall_('enterFullScreen');\n } else {\n // fullscreen isn't supported so we'll just stretch the video element to\n // fill the viewport\n this.enterFullWindow();\n }\n }\n\n /**\n * Return the video to its normal size after having been in full screen mode\n *\n * @fires Player#fullscreenchange\n */\n exitFullscreen() {\n const self = this;\n return new Promise((resolve, reject) => {\n function offHandler() {\n self.off('fullscreenerror', errorHandler);\n self.off('fullscreenchange', changeHandler);\n }\n function changeHandler() {\n offHandler();\n resolve();\n }\n function errorHandler(e, err) {\n offHandler();\n reject(err);\n }\n self.one('fullscreenchange', changeHandler);\n self.one('fullscreenerror', errorHandler);\n const promise = self.exitFullscreenHelper_();\n if (promise) {\n promise.then(offHandler, offHandler);\n // map the promise to our resolve/reject methods\n promise.then(resolve, reject);\n }\n });\n }\n exitFullscreenHelper_() {\n if (this.fsApi_.requestFullscreen) {\n const promise = document[this.fsApi_.exitFullscreen]();\n\n // Even on browsers with promise support this may not return a promise\n if (promise) {\n // we're splitting the promise here, so, we want to catch the\n // potential error so that this chain doesn't have unhandled errors\n silencePromise(promise.then(() => this.isFullscreen(false)));\n }\n return promise;\n } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n this.techCall_('exitFullScreen');\n } else {\n this.exitFullWindow();\n }\n }\n\n /**\n * When fullscreen isn't supported we can stretch the\n * video container to as wide as the browser will let us.\n *\n * @fires Player#enterFullWindow\n */\n enterFullWindow() {\n this.isFullscreen(true);\n this.isFullWindow = true;\n\n // Storing original doc overflow value to return to when fullscreen is off\n this.docOrigOverflow = document.documentElement.style.overflow;\n\n // Add listener for esc key to exit fullscreen\n on(document, 'keydown', this.boundFullWindowOnEscKey_);\n\n // Hide any scroll bars\n document.documentElement.style.overflow = 'hidden';\n\n // Apply fullscreen styles\n addClass(document.body, 'vjs-full-window');\n\n /**\n * @event Player#enterFullWindow\n * @type {Event}\n */\n this.trigger('enterFullWindow');\n }\n\n /**\n * Check for call to either exit full window or\n * full screen on ESC key\n *\n * @param {string} event\n * Event to check for key press\n */\n fullWindowOnEscKey(event) {\n if (keycode.isEventKey(event, 'Esc')) {\n if (this.isFullscreen() === true) {\n if (!this.isFullWindow) {\n this.exitFullscreen();\n } else {\n this.exitFullWindow();\n }\n }\n }\n }\n\n /**\n * Exit full window\n *\n * @fires Player#exitFullWindow\n */\n exitFullWindow() {\n this.isFullscreen(false);\n this.isFullWindow = false;\n off(document, 'keydown', this.boundFullWindowOnEscKey_);\n\n // Unhide scroll bars.\n document.documentElement.style.overflow = this.docOrigOverflow;\n\n // Remove fullscreen styles\n removeClass(document.body, 'vjs-full-window');\n\n // Resize the box, controller, and poster to original sizes\n // this.positionAll();\n /**\n * @event Player#exitFullWindow\n * @type {Event}\n */\n this.trigger('exitFullWindow');\n }\n\n /**\n * Disable Picture-in-Picture mode.\n *\n * @param {boolean} value\n * - true will disable Picture-in-Picture mode\n * - false will enable Picture-in-Picture mode\n */\n disablePictureInPicture(value) {\n if (value === undefined) {\n return this.techGet_('disablePictureInPicture');\n }\n this.techCall_('setDisablePictureInPicture', value);\n this.options_.disablePictureInPicture = value;\n this.trigger('disablepictureinpicturechanged');\n }\n\n /**\n * Check if the player is in Picture-in-Picture mode or tell the player that it\n * is or is not in Picture-in-Picture mode.\n *\n * @param {boolean} [isPiP]\n * Set the players current Picture-in-Picture state\n *\n * @return {boolean}\n * - true if Picture-in-Picture is on and getting\n * - false if Picture-in-Picture is off and getting\n */\n isInPictureInPicture(isPiP) {\n if (isPiP !== undefined) {\n this.isInPictureInPicture_ = !!isPiP;\n this.togglePictureInPictureClass_();\n return;\n }\n return !!this.isInPictureInPicture_;\n }\n\n /**\n * Create a floating video window always on top of other windows so that users may\n * continue consuming media while they interact with other content sites, or\n * applications on their device.\n *\n * This can use document picture-in-picture or element picture in picture\n *\n * Set `enableDocumentPictureInPicture` to `true` to use docPiP on a supported browser\n * Else set `disablePictureInPicture` to `false` to disable elPiP on a supported browser\n *\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/}\n * @see [Spec]{@link https://wicg.github.io/document-picture-in-picture/}\n *\n * @fires Player#enterpictureinpicture\n *\n * @return {Promise}\n * A promise with a Picture-in-Picture window.\n */\n requestPictureInPicture() {\n if (this.options_.enableDocumentPictureInPicture && window.documentPictureInPicture) {\n const pipContainer = document.createElement(this.el().tagName);\n pipContainer.classList = this.el().classList;\n pipContainer.classList.add('vjs-pip-container');\n if (this.posterImage) {\n pipContainer.appendChild(this.posterImage.el().cloneNode(true));\n }\n if (this.titleBar) {\n pipContainer.appendChild(this.titleBar.el().cloneNode(true));\n }\n pipContainer.appendChild(createEl('p', {\n className: 'vjs-pip-text'\n }, {}, this.localize('Playing in picture-in-picture')));\n return window.documentPictureInPicture.requestWindow({\n // The aspect ratio won't be correct, Chrome bug https://crbug.com/1407629\n initialAspectRatio: this.videoWidth() / this.videoHeight(),\n copyStyleSheets: true\n }).then(pipWindow => {\n this.el_.parentNode.insertBefore(pipContainer, this.el_);\n pipWindow.document.body.append(this.el_);\n pipWindow.document.body.classList.add('vjs-pip-window');\n this.player_.isInPictureInPicture(true);\n this.player_.trigger('enterpictureinpicture');\n\n // Listen for the PiP closing event to move the video back.\n pipWindow.addEventListener('unload', event => {\n const pipVideo = event.target.querySelector('.video-js');\n pipContainer.replaceWith(pipVideo);\n this.player_.isInPictureInPicture(false);\n this.player_.trigger('leavepictureinpicture');\n });\n return pipWindow;\n });\n }\n if ('pictureInPictureEnabled' in document && this.disablePictureInPicture() === false) {\n /**\n * This event fires when the player enters picture in picture mode\n *\n * @event Player#enterpictureinpicture\n * @type {Event}\n */\n return this.techGet_('requestPictureInPicture');\n }\n return Promise.reject('No PiP mode is available');\n }\n\n /**\n * Exit Picture-in-Picture mode.\n *\n * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n *\n * @fires Player#leavepictureinpicture\n *\n * @return {Promise}\n * A promise.\n */\n exitPictureInPicture() {\n if (window.documentPictureInPicture && window.documentPictureInPicture.window) {\n // With documentPictureInPicture, Player#leavepictureinpicture is fired in the unload handler\n window.documentPictureInPicture.window.close();\n return Promise.resolve();\n }\n if ('pictureInPictureEnabled' in document) {\n /**\n * This event fires when the player leaves picture in picture mode\n *\n * @event Player#leavepictureinpicture\n * @type {Event}\n */\n return document.exitPictureInPicture();\n }\n }\n\n /**\n * Called when this Player has focus and a key gets pressed down, or when\n * any Component of this player receives a key press that it doesn't handle.\n * This allows player-wide hotkeys (either as defined below, or optionally\n * by an external function).\n *\n * @param {Event} event\n * The `keydown` event that caused this function to be called.\n *\n * @listens keydown\n */\n handleKeyDown(event) {\n const {\n userActions\n } = this.options_;\n\n // Bail out if hotkeys are not configured.\n if (!userActions || !userActions.hotkeys) {\n return;\n }\n\n // Function that determines whether or not to exclude an element from\n // hotkeys handling.\n const excludeElement = el => {\n const tagName = el.tagName.toLowerCase();\n\n // The first and easiest test is for `contenteditable` elements.\n if (el.isContentEditable) {\n return true;\n }\n\n // Inputs matching these types will still trigger hotkey handling as\n // they are not text inputs.\n const allowedInputTypes = ['button', 'checkbox', 'hidden', 'radio', 'reset', 'submit'];\n if (tagName === 'input') {\n return allowedInputTypes.indexOf(el.type) === -1;\n }\n\n // The final test is by tag name. These tags will be excluded entirely.\n const excludedTags = ['textarea'];\n return excludedTags.indexOf(tagName) !== -1;\n };\n\n // Bail out if the user is focused on an interactive form element.\n if (excludeElement(this.el_.ownerDocument.activeElement)) {\n return;\n }\n if (typeof userActions.hotkeys === 'function') {\n userActions.hotkeys.call(this, event);\n } else {\n this.handleHotkeys(event);\n }\n }\n\n /**\n * Called when this Player receives a hotkey keydown event.\n * Supported player-wide hotkeys are:\n *\n * f - toggle fullscreen\n * m - toggle mute\n * k or Space - toggle play/pause\n *\n * @param {Event} event\n * The `keydown` event that caused this function to be called.\n */\n handleHotkeys(event) {\n const hotkeys = this.options_.userActions ? this.options_.userActions.hotkeys : {};\n\n // set fullscreenKey, muteKey, playPauseKey from `hotkeys`, use defaults if not set\n const {\n fullscreenKey = keydownEvent => keycode.isEventKey(keydownEvent, 'f'),\n muteKey = keydownEvent => keycode.isEventKey(keydownEvent, 'm'),\n playPauseKey = keydownEvent => keycode.isEventKey(keydownEvent, 'k') || keycode.isEventKey(keydownEvent, 'Space')\n } = hotkeys;\n if (fullscreenKey.call(this, event)) {\n event.preventDefault();\n event.stopPropagation();\n const FSToggle = Component$1.getComponent('FullscreenToggle');\n if (document[this.fsApi_.fullscreenEnabled] !== false) {\n FSToggle.prototype.handleClick.call(this, event);\n }\n } else if (muteKey.call(this, event)) {\n event.preventDefault();\n event.stopPropagation();\n const MuteToggle = Component$1.getComponent('MuteToggle');\n MuteToggle.prototype.handleClick.call(this, event);\n } else if (playPauseKey.call(this, event)) {\n event.preventDefault();\n event.stopPropagation();\n const PlayToggle = Component$1.getComponent('PlayToggle');\n PlayToggle.prototype.handleClick.call(this, event);\n }\n }\n\n /**\n * Check whether the player can play a given mimetype\n *\n * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n *\n * @param {string} type\n * The mimetype to check\n *\n * @return {string}\n * 'probably', 'maybe', or '' (empty string)\n */\n canPlayType(type) {\n let can;\n\n // Loop through each playback technology in the options order\n for (let i = 0, j = this.options_.techOrder; i < j.length; i++) {\n const techName = j[i];\n let tech = Tech.getTech(techName);\n\n // Support old behavior of techs being registered as components.\n // Remove once that deprecated behavior is removed.\n if (!tech) {\n tech = Component$1.getComponent(techName);\n }\n\n // Check if the current tech is defined before continuing\n if (!tech) {\n log$1.error(`The \"${techName}\" tech is undefined. Skipped browser support check for that tech.`);\n continue;\n }\n\n // Check if the browser supports this technology\n if (tech.isSupported()) {\n can = tech.canPlayType(type);\n if (can) {\n return can;\n }\n }\n }\n return '';\n }\n\n /**\n * Select source based on tech-order or source-order\n * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n * defaults to tech-order selection\n *\n * @param {Array} sources\n * The sources for a media asset\n *\n * @return {Object|boolean}\n * Object of source and tech order or false\n */\n selectSource(sources) {\n // Get only the techs specified in `techOrder` that exist and are supported by the\n // current platform\n const techs = this.options_.techOrder.map(techName => {\n return [techName, Tech.getTech(techName)];\n }).filter(([techName, tech]) => {\n // Check if the current tech is defined before continuing\n if (tech) {\n // Check if the browser supports this technology\n return tech.isSupported();\n }\n log$1.error(`The \"${techName}\" tech is undefined. Skipped browser support check for that tech.`);\n return false;\n });\n\n // Iterate over each `innerArray` element once per `outerArray` element and execute\n // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n // that value.\n const findFirstPassingTechSourcePair = function (outerArray, innerArray, tester) {\n let found;\n outerArray.some(outerChoice => {\n return innerArray.some(innerChoice => {\n found = tester(outerChoice, innerChoice);\n if (found) {\n return true;\n }\n });\n });\n return found;\n };\n let foundSourceAndTech;\n const flip = fn => (a, b) => fn(b, a);\n const finder = ([techName, tech], source) => {\n if (tech.canPlaySource(source, this.options_[techName.toLowerCase()])) {\n return {\n source,\n tech: techName\n };\n }\n };\n\n // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n // to select from them based on their priority.\n if (this.options_.sourceOrder) {\n // Source-first ordering\n foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n } else {\n // Tech-first ordering\n foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n }\n return foundSourceAndTech || false;\n }\n\n /**\n * Executes source setting and getting logic\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n * A SourceObject, an array of SourceObjects, or a string referencing\n * a URL to a media source. It is _highly recommended_ that an object\n * or array of objects is used here, so that source selection\n * algorithms can take the `type` into account.\n *\n * If not provided, this method acts as a getter.\n * @param {boolean} isRetry\n * Indicates whether this is being called internally as a result of a retry\n *\n * @return {string|undefined}\n * If the `source` argument is missing, returns the current source\n * URL. Otherwise, returns nothing/undefined.\n */\n handleSrc_(source, isRetry) {\n // getter usage\n if (typeof source === 'undefined') {\n return this.cache_.src || '';\n }\n\n // Reset retry behavior for new source\n if (this.resetRetryOnError_) {\n this.resetRetryOnError_();\n }\n\n // filter out invalid sources and turn our source into\n // an array of source objects\n const sources = filterSource(source);\n\n // if a source was passed in then it is invalid because\n // it was filtered to a zero length Array. So we have to\n // show an error\n if (!sources.length) {\n this.setTimeout(function () {\n this.error({\n code: 4,\n message: this.options_.notSupportedMessage\n });\n }, 0);\n return;\n }\n\n // initial sources\n this.changingSrc_ = true;\n\n // Only update the cached source list if we are not retrying a new source after error,\n // since in that case we want to include the failed source(s) in the cache\n if (!isRetry) {\n this.cache_.sources = sources;\n }\n this.updateSourceCaches_(sources[0]);\n\n // middlewareSource is the source after it has been changed by middleware\n setSource(this, sources[0], (middlewareSource, mws) => {\n this.middleware_ = mws;\n\n // since sourceSet is async we have to update the cache again after we select a source since\n // the source that is selected could be out of order from the cache update above this callback.\n if (!isRetry) {\n this.cache_.sources = sources;\n }\n this.updateSourceCaches_(middlewareSource);\n const err = this.src_(middlewareSource);\n if (err) {\n if (sources.length > 1) {\n return this.handleSrc_(sources.slice(1));\n }\n this.changingSrc_ = false;\n\n // We need to wrap this in a timeout to give folks a chance to add error event handlers\n this.setTimeout(function () {\n this.error({\n code: 4,\n message: this.options_.notSupportedMessage\n });\n }, 0);\n\n // we could not find an appropriate tech, but let's still notify the delegate that this is it\n // this needs a better comment about why this is needed\n this.triggerReady();\n return;\n }\n setTech(mws, this.tech_);\n });\n\n // Try another available source if this one fails before playback.\n if (sources.length > 1) {\n const retry = () => {\n // Remove the error modal\n this.error(null);\n this.handleSrc_(sources.slice(1), true);\n };\n const stopListeningForErrors = () => {\n this.off('error', retry);\n };\n this.one('error', retry);\n this.one('playing', stopListeningForErrors);\n this.resetRetryOnError_ = () => {\n this.off('error', retry);\n this.off('playing', stopListeningForErrors);\n };\n }\n }\n\n /**\n * Get or set the video source.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n * A SourceObject, an array of SourceObjects, or a string referencing\n * a URL to a media source. It is _highly recommended_ that an object\n * or array of objects is used here, so that source selection\n * algorithms can take the `type` into account.\n *\n * If not provided, this method acts as a getter.\n *\n * @return {string|undefined}\n * If the `source` argument is missing, returns the current source\n * URL. Otherwise, returns nothing/undefined.\n */\n src(source) {\n return this.handleSrc_(source, false);\n }\n\n /**\n * Set the source object on the tech, returns a boolean that indicates whether\n * there is a tech that can play the source or not\n *\n * @param {Tech~SourceObject} source\n * The source object to set on the Tech\n *\n * @return {boolean}\n * - True if there is no Tech to playback this source\n * - False otherwise\n *\n * @private\n */\n src_(source) {\n const sourceTech = this.selectSource([source]);\n if (!sourceTech) {\n return true;\n }\n if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n this.changingSrc_ = true;\n // load this technology with the chosen source\n this.loadTech_(sourceTech.tech, sourceTech.source);\n this.tech_.ready(() => {\n this.changingSrc_ = false;\n });\n return false;\n }\n\n // wait until the tech is ready to set the source\n // and set it synchronously if possible (#2326)\n this.ready(function () {\n // The setSource tech method was added with source handlers\n // so older techs won't support it\n // We need to check the direct prototype for the case where subclasses\n // of the tech do not support source handlers\n if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n this.techCall_('setSource', source);\n } else {\n this.techCall_('src', source.src);\n }\n this.changingSrc_ = false;\n }, true);\n return false;\n }\n\n /**\n * Begin loading the src data.\n */\n load() {\n this.techCall_('load');\n }\n\n /**\n * Reset the player. Loads the first tech in the techOrder,\n * removes all the text tracks in the existing `tech`,\n * and calls `reset` on the `tech`.\n */\n reset() {\n if (this.paused()) {\n this.doReset_();\n } else {\n const playPromise = this.play();\n silencePromise(playPromise.then(() => this.doReset_()));\n }\n }\n doReset_() {\n if (this.tech_) {\n this.tech_.clearTracks('text');\n }\n this.resetCache_();\n this.poster('');\n this.loadTech_(this.options_.techOrder[0], null);\n this.techCall_('reset');\n this.resetControlBarUI_();\n if (isEvented(this)) {\n this.trigger('playerreset');\n }\n }\n\n /**\n * Reset Control Bar's UI by calling sub-methods that reset\n * all of Control Bar's components\n */\n resetControlBarUI_() {\n this.resetProgressBar_();\n this.resetPlaybackRate_();\n this.resetVolumeBar_();\n }\n\n /**\n * Reset tech's progress so progress bar is reset in the UI\n */\n resetProgressBar_() {\n this.currentTime(0);\n const {\n currentTimeDisplay,\n durationDisplay,\n progressControl,\n remainingTimeDisplay\n } = this.controlBar || {};\n const {\n seekBar\n } = progressControl || {};\n if (currentTimeDisplay) {\n currentTimeDisplay.updateContent();\n }\n if (durationDisplay) {\n durationDisplay.updateContent();\n }\n if (remainingTimeDisplay) {\n remainingTimeDisplay.updateContent();\n }\n if (seekBar) {\n seekBar.update();\n if (seekBar.loadProgressBar) {\n seekBar.loadProgressBar.update();\n }\n }\n }\n\n /**\n * Reset Playback ratio\n */\n resetPlaybackRate_() {\n this.playbackRate(this.defaultPlaybackRate());\n this.handleTechRateChange_();\n }\n\n /**\n * Reset Volume bar\n */\n resetVolumeBar_() {\n this.volume(1.0);\n this.trigger('volumechange');\n }\n\n /**\n * Returns all of the current source objects.\n *\n * @return {Tech~SourceObject[]}\n * The current source objects\n */\n currentSources() {\n const source = this.currentSource();\n const sources = [];\n\n // assume `{}` or `{ src }`\n if (Object.keys(source).length !== 0) {\n sources.push(source);\n }\n return this.cache_.sources || sources;\n }\n\n /**\n * Returns the current source object.\n *\n * @return {Tech~SourceObject}\n * The current source object\n */\n currentSource() {\n return this.cache_.source || {};\n }\n\n /**\n * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.\n *\n * @return {string}\n * The current source\n */\n currentSrc() {\n return this.currentSource() && this.currentSource().src || '';\n }\n\n /**\n * Get the current source type e.g. video/mp4\n * This can allow you rebuild the current source object so that you could load the same\n * source and tech later\n *\n * @return {string}\n * The source MIME type\n */\n currentType() {\n return this.currentSource() && this.currentSource().type || '';\n }\n\n /**\n * Get or set the preload attribute\n *\n * @param {boolean} [value]\n * - true means that we should preload\n * - false means that we should not preload\n *\n * @return {string}\n * The preload attribute value when getting\n */\n preload(value) {\n if (value !== undefined) {\n this.techCall_('setPreload', value);\n this.options_.preload = value;\n return;\n }\n return this.techGet_('preload');\n }\n\n /**\n * Get or set the autoplay option. When this is a boolean it will\n * modify the attribute on the tech. When this is a string the attribute on\n * the tech will be removed and `Player` will handle autoplay on loadstarts.\n *\n * @param {boolean|string} [value]\n * - true: autoplay using the browser behavior\n * - false: do not autoplay\n * - 'play': call play() on every loadstart\n * - 'muted': call muted() then play() on every loadstart\n * - 'any': call play() on every loadstart. if that fails call muted() then play().\n * - *: values other than those listed here will be set `autoplay` to true\n *\n * @return {boolean|string}\n * The current value of autoplay when getting\n */\n autoplay(value) {\n // getter usage\n if (value === undefined) {\n return this.options_.autoplay || false;\n }\n let techAutoplay;\n\n // if the value is a valid string set it to that, or normalize `true` to 'play', if need be\n if (typeof value === 'string' && /(any|play|muted)/.test(value) || value === true && this.options_.normalizeAutoplay) {\n this.options_.autoplay = value;\n this.manualAutoplay_(typeof value === 'string' ? value : 'play');\n techAutoplay = false;\n\n // any falsy value sets autoplay to false in the browser,\n // lets do the same\n } else if (!value) {\n this.options_.autoplay = false;\n\n // any other value (ie truthy) sets autoplay to true\n } else {\n this.options_.autoplay = true;\n }\n techAutoplay = typeof techAutoplay === 'undefined' ? this.options_.autoplay : techAutoplay;\n\n // if we don't have a tech then we do not queue up\n // a setAutoplay call on tech ready. We do this because the\n // autoplay option will be passed in the constructor and we\n // do not need to set it twice\n if (this.tech_) {\n this.techCall_('setAutoplay', techAutoplay);\n }\n }\n\n /**\n * Set or unset the playsinline attribute.\n * Playsinline tells the browser that non-fullscreen playback is preferred.\n *\n * @param {boolean} [value]\n * - true means that we should try to play inline by default\n * - false means that we should use the browser's default playback mode,\n * which in most cases is inline. iOS Safari is a notable exception\n * and plays fullscreen by default.\n *\n * @return {string|Player}\n * - the current value of playsinline\n * - the player when setting\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n playsinline(value) {\n if (value !== undefined) {\n this.techCall_('setPlaysinline', value);\n this.options_.playsinline = value;\n return this;\n }\n return this.techGet_('playsinline');\n }\n\n /**\n * Get or set the loop attribute on the video element.\n *\n * @param {boolean} [value]\n * - true means that we should loop the video\n * - false means that we should not loop the video\n *\n * @return {boolean}\n * The current value of loop when getting\n */\n loop(value) {\n if (value !== undefined) {\n this.techCall_('setLoop', value);\n this.options_.loop = value;\n return;\n }\n return this.techGet_('loop');\n }\n\n /**\n * Get or set the poster image source url\n *\n * @fires Player#posterchange\n *\n * @param {string} [src]\n * Poster image source URL\n *\n * @return {string}\n * The current value of poster when getting\n */\n poster(src) {\n if (src === undefined) {\n return this.poster_;\n }\n\n // The correct way to remove a poster is to set as an empty string\n // other falsey values will throw errors\n if (!src) {\n src = '';\n }\n if (src === this.poster_) {\n return;\n }\n\n // update the internal poster variable\n this.poster_ = src;\n\n // update the tech's poster\n this.techCall_('setPoster', src);\n this.isPosterFromTech_ = false;\n\n // alert components that the poster has been set\n /**\n * This event fires when the poster image is changed on the player.\n *\n * @event Player#posterchange\n * @type {Event}\n */\n this.trigger('posterchange');\n }\n\n /**\n * Some techs (e.g. YouTube) can provide a poster source in an\n * asynchronous way. We want the poster component to use this\n * poster source so that it covers up the tech's controls.\n * (YouTube's play button). However we only want to use this\n * source if the player user hasn't set a poster through\n * the normal APIs.\n *\n * @fires Player#posterchange\n * @listens Tech#posterchange\n * @private\n */\n handleTechPosterChange_() {\n if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n const newPoster = this.tech_.poster() || '';\n if (newPoster !== this.poster_) {\n this.poster_ = newPoster;\n this.isPosterFromTech_ = true;\n\n // Let components know the poster has changed\n this.trigger('posterchange');\n }\n }\n }\n\n /**\n * Get or set whether or not the controls are showing.\n *\n * @fires Player#controlsenabled\n *\n * @param {boolean} [bool]\n * - true to turn controls on\n * - false to turn controls off\n *\n * @return {boolean}\n * The current value of controls when getting\n */\n controls(bool) {\n if (bool === undefined) {\n return !!this.controls_;\n }\n bool = !!bool;\n\n // Don't trigger a change event unless it actually changed\n if (this.controls_ === bool) {\n return;\n }\n this.controls_ = bool;\n if (this.usingNativeControls()) {\n this.techCall_('setControls', bool);\n }\n if (this.controls_) {\n this.removeClass('vjs-controls-disabled');\n this.addClass('vjs-controls-enabled');\n /**\n * @event Player#controlsenabled\n * @type {Event}\n */\n this.trigger('controlsenabled');\n if (!this.usingNativeControls()) {\n this.addTechControlsListeners_();\n }\n } else {\n this.removeClass('vjs-controls-enabled');\n this.addClass('vjs-controls-disabled');\n /**\n * @event Player#controlsdisabled\n * @type {Event}\n */\n this.trigger('controlsdisabled');\n if (!this.usingNativeControls()) {\n this.removeTechControlsListeners_();\n }\n }\n }\n\n /**\n * Toggle native controls on/off. Native controls are the controls built into\n * devices (e.g. default iPhone controls) or other techs\n * (e.g. Vimeo Controls)\n * **This should only be set by the current tech, because only the tech knows\n * if it can support native controls**\n *\n * @fires Player#usingnativecontrols\n * @fires Player#usingcustomcontrols\n *\n * @param {boolean} [bool]\n * - true to turn native controls on\n * - false to turn native controls off\n *\n * @return {boolean}\n * The current value of native controls when getting\n */\n usingNativeControls(bool) {\n if (bool === undefined) {\n return !!this.usingNativeControls_;\n }\n bool = !!bool;\n\n // Don't trigger a change event unless it actually changed\n if (this.usingNativeControls_ === bool) {\n return;\n }\n this.usingNativeControls_ = bool;\n if (this.usingNativeControls_) {\n this.addClass('vjs-using-native-controls');\n\n /**\n * player is using the native device controls\n *\n * @event Player#usingnativecontrols\n * @type {Event}\n */\n this.trigger('usingnativecontrols');\n } else {\n this.removeClass('vjs-using-native-controls');\n\n /**\n * player is using the custom HTML controls\n *\n * @event Player#usingcustomcontrols\n * @type {Event}\n */\n this.trigger('usingcustomcontrols');\n }\n }\n\n /**\n * Set or get the current MediaError\n *\n * @fires Player#error\n *\n * @param {MediaError|string|number} [err]\n * A MediaError or a string/number to be turned\n * into a MediaError\n *\n * @return {MediaError|null}\n * The current MediaError when getting (or null)\n */\n error(err) {\n if (err === undefined) {\n return this.error_ || null;\n }\n\n // allow hooks to modify error object\n hooks('beforeerror').forEach(hookFunction => {\n const newErr = hookFunction(this, err);\n if (!(isObject$1(newErr) && !Array.isArray(newErr) || typeof newErr === 'string' || typeof newErr === 'number' || newErr === null)) {\n this.log.error('please return a value that MediaError expects in beforeerror hooks');\n return;\n }\n err = newErr;\n });\n\n // Suppress the first error message for no compatible source until\n // user interaction\n if (this.options_.suppressNotSupportedError && err && err.code === 4) {\n const triggerSuppressedError = function () {\n this.error(err);\n };\n this.options_.suppressNotSupportedError = false;\n this.any(['click', 'touchstart'], triggerSuppressedError);\n this.one('loadstart', function () {\n this.off(['click', 'touchstart'], triggerSuppressedError);\n });\n return;\n }\n\n // restoring to default\n if (err === null) {\n this.error_ = err;\n this.removeClass('vjs-error');\n if (this.errorDisplay) {\n this.errorDisplay.close();\n }\n return;\n }\n this.error_ = new MediaError(err);\n\n // add the vjs-error classname to the player\n this.addClass('vjs-error');\n\n // log the name of the error type and any message\n // IE11 logs \"[object object]\" and required you to expand message to see error object\n log$1.error(`(CODE:${this.error_.code} ${MediaError.errorTypes[this.error_.code]})`, this.error_.message, this.error_);\n\n /**\n * @event Player#error\n * @type {Event}\n */\n this.trigger('error');\n\n // notify hooks of the per player error\n hooks('error').forEach(hookFunction => hookFunction(this, this.error_));\n return;\n }\n\n /**\n * Report user activity\n *\n * @param {Object} event\n * Event object\n */\n reportUserActivity(event) {\n this.userActivity_ = true;\n }\n\n /**\n * Get/set if user is active\n *\n * @fires Player#useractive\n * @fires Player#userinactive\n *\n * @param {boolean} [bool]\n * - true if the user is active\n * - false if the user is inactive\n *\n * @return {boolean}\n * The current value of userActive when getting\n */\n userActive(bool) {\n if (bool === undefined) {\n return this.userActive_;\n }\n bool = !!bool;\n if (bool === this.userActive_) {\n return;\n }\n this.userActive_ = bool;\n if (this.userActive_) {\n this.userActivity_ = true;\n this.removeClass('vjs-user-inactive');\n this.addClass('vjs-user-active');\n /**\n * @event Player#useractive\n * @type {Event}\n */\n this.trigger('useractive');\n return;\n }\n\n // Chrome/Safari/IE have bugs where when you change the cursor it can\n // trigger a mousemove event. This causes an issue when you're hiding\n // the cursor when the user is inactive, and a mousemove signals user\n // activity. Making it impossible to go into inactive mode. Specifically\n // this happens in fullscreen when we really need to hide the cursor.\n //\n // When this gets resolved in ALL browsers it can be removed\n // https://code.google.com/p/chromium/issues/detail?id=103041\n if (this.tech_) {\n this.tech_.one('mousemove', function (e) {\n e.stopPropagation();\n e.preventDefault();\n });\n }\n this.userActivity_ = false;\n this.removeClass('vjs-user-active');\n this.addClass('vjs-user-inactive');\n /**\n * @event Player#userinactive\n * @type {Event}\n */\n this.trigger('userinactive');\n }\n\n /**\n * Listen for user activity based on timeout value\n *\n * @private\n */\n listenForUserActivity_() {\n let mouseInProgress;\n let lastMoveX;\n let lastMoveY;\n const handleActivity = bind_(this, this.reportUserActivity);\n const handleMouseMove = function (e) {\n // #1068 - Prevent mousemove spamming\n // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n lastMoveX = e.screenX;\n lastMoveY = e.screenY;\n handleActivity();\n }\n };\n const handleMouseDown = function () {\n handleActivity();\n // For as long as the they are touching the device or have their mouse down,\n // we consider them active even if they're not moving their finger or mouse.\n // So we want to continue to update that they are active\n this.clearInterval(mouseInProgress);\n // Setting userActivity=true now and setting the interval to the same time\n // as the activityCheck interval (250) should ensure we never miss the\n // next activityCheck\n mouseInProgress = this.setInterval(handleActivity, 250);\n };\n const handleMouseUpAndMouseLeave = function (event) {\n handleActivity();\n // Stop the interval that maintains activity if the mouse/touch is down\n this.clearInterval(mouseInProgress);\n };\n\n // Any mouse movement will be considered user activity\n this.on('mousedown', handleMouseDown);\n this.on('mousemove', handleMouseMove);\n this.on('mouseup', handleMouseUpAndMouseLeave);\n this.on('mouseleave', handleMouseUpAndMouseLeave);\n const controlBar = this.getChild('controlBar');\n\n // Fixes bug on Android & iOS where when tapping progressBar (when control bar is displayed)\n // controlBar would no longer be hidden by default timeout.\n if (controlBar && !IS_IOS && !IS_ANDROID) {\n controlBar.on('mouseenter', function (event) {\n if (this.player().options_.inactivityTimeout !== 0) {\n this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;\n }\n this.player().options_.inactivityTimeout = 0;\n });\n controlBar.on('mouseleave', function (event) {\n this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;\n });\n }\n\n // Listen for keyboard navigation\n // Shouldn't need to use inProgress interval because of key repeat\n this.on('keydown', handleActivity);\n this.on('keyup', handleActivity);\n\n // Run an interval every 250 milliseconds instead of stuffing everything into\n // the mousemove/touchmove function itself, to prevent performance degradation.\n // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n // then gets picked up by this loop\n // http://ejohn.org/blog/learning-from-twitter/\n let inactivityTimeout;\n this.setInterval(function () {\n // Check to see if mouse/touch activity has happened\n if (!this.userActivity_) {\n return;\n }\n\n // Reset the activity tracker\n this.userActivity_ = false;\n\n // If the user state was inactive, set the state to active\n this.userActive(true);\n\n // Clear any existing inactivity timeout to start the timer over\n this.clearTimeout(inactivityTimeout);\n const timeout = this.options_.inactivityTimeout;\n if (timeout <= 0) {\n return;\n }\n\n // In <timeout> milliseconds, if no more activity has occurred the\n // user will be considered inactive\n inactivityTimeout = this.setTimeout(function () {\n // Protect against the case where the inactivityTimeout can trigger just\n // before the next user activity is picked up by the activity check loop\n // causing a flicker\n if (!this.userActivity_) {\n this.userActive(false);\n }\n }, timeout);\n }, 250);\n }\n\n /**\n * Gets or sets the current playback rate. A playback rate of\n * 1.0 represents normal speed and 0.5 would indicate half-speed\n * playback, for instance.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n *\n * @param {number} [rate]\n * New playback rate to set.\n *\n * @return {number}\n * The current playback rate when getting or 1.0\n */\n playbackRate(rate) {\n if (rate !== undefined) {\n // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n // that is registered above\n this.techCall_('setPlaybackRate', rate);\n return;\n }\n if (this.tech_ && this.tech_.featuresPlaybackRate) {\n return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n }\n return 1.0;\n }\n\n /**\n * Gets or sets the current default playback rate. A default playback rate of\n * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not\n * not the current playbackRate.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n *\n * @param {number} [rate]\n * New default playback rate to set.\n *\n * @return {number|Player}\n * - The default playback rate when getting or 1.0\n * - the player when setting\n */\n defaultPlaybackRate(rate) {\n if (rate !== undefined) {\n return this.techCall_('setDefaultPlaybackRate', rate);\n }\n if (this.tech_ && this.tech_.featuresPlaybackRate) {\n return this.techGet_('defaultPlaybackRate');\n }\n return 1.0;\n }\n\n /**\n * Gets or sets the audio flag\n *\n * @param {boolean} bool\n * - true signals that this is an audio player\n * - false signals that this is not an audio player\n *\n * @return {boolean}\n * The current value of isAudio when getting\n */\n isAudio(bool) {\n if (bool !== undefined) {\n this.isAudio_ = !!bool;\n return;\n }\n return !!this.isAudio_;\n }\n enableAudioOnlyUI_() {\n // Update styling immediately to show the control bar so we can get its height\n this.addClass('vjs-audio-only-mode');\n const playerChildren = this.children();\n const controlBar = this.getChild('ControlBar');\n const controlBarHeight = controlBar && controlBar.currentHeight();\n\n // Hide all player components except the control bar. Control bar components\n // needed only for video are hidden with CSS\n playerChildren.forEach(child => {\n if (child === controlBar) {\n return;\n }\n if (child.el_ && !child.hasClass('vjs-hidden')) {\n child.hide();\n this.audioOnlyCache_.hiddenChildren.push(child);\n }\n });\n this.audioOnlyCache_.playerHeight = this.currentHeight();\n\n // Set the player height the same as the control bar\n this.height(controlBarHeight);\n this.trigger('audioonlymodechange');\n }\n disableAudioOnlyUI_() {\n this.removeClass('vjs-audio-only-mode');\n\n // Show player components that were previously hidden\n this.audioOnlyCache_.hiddenChildren.forEach(child => child.show());\n\n // Reset player height\n this.height(this.audioOnlyCache_.playerHeight);\n this.trigger('audioonlymodechange');\n }\n\n /**\n * Get the current audioOnlyMode state or set audioOnlyMode to true or false.\n *\n * Setting this to `true` will hide all player components except the control bar,\n * as well as control bar components needed only for video.\n *\n * @param {boolean} [value]\n * The value to set audioOnlyMode to.\n *\n * @return {Promise|boolean}\n * A Promise is returned when setting the state, and a boolean when getting\n * the present state\n */\n audioOnlyMode(value) {\n if (typeof value !== 'boolean' || value === this.audioOnlyMode_) {\n return this.audioOnlyMode_;\n }\n this.audioOnlyMode_ = value;\n\n // Enable Audio Only Mode\n if (value) {\n const exitPromises = [];\n\n // Fullscreen and PiP are not supported in audioOnlyMode, so exit if we need to.\n if (this.isInPictureInPicture()) {\n exitPromises.push(this.exitPictureInPicture());\n }\n if (this.isFullscreen()) {\n exitPromises.push(this.exitFullscreen());\n }\n if (this.audioPosterMode()) {\n exitPromises.push(this.audioPosterMode(false));\n }\n return Promise.all(exitPromises).then(() => this.enableAudioOnlyUI_());\n }\n\n // Disable Audio Only Mode\n return Promise.resolve().then(() => this.disableAudioOnlyUI_());\n }\n enablePosterModeUI_() {\n // Hide the video element and show the poster image to enable posterModeUI\n const tech = this.tech_ && this.tech_;\n tech.hide();\n this.addClass('vjs-audio-poster-mode');\n this.trigger('audiopostermodechange');\n }\n disablePosterModeUI_() {\n // Show the video element and hide the poster image to disable posterModeUI\n const tech = this.tech_ && this.tech_;\n tech.show();\n this.removeClass('vjs-audio-poster-mode');\n this.trigger('audiopostermodechange');\n }\n\n /**\n * Get the current audioPosterMode state or set audioPosterMode to true or false\n *\n * @param {boolean} [value]\n * The value to set audioPosterMode to.\n *\n * @return {Promise|boolean}\n * A Promise is returned when setting the state, and a boolean when getting\n * the present state\n */\n audioPosterMode(value) {\n if (typeof value !== 'boolean' || value === this.audioPosterMode_) {\n return this.audioPosterMode_;\n }\n this.audioPosterMode_ = value;\n if (value) {\n if (this.audioOnlyMode()) {\n const audioOnlyModePromise = this.audioOnlyMode(false);\n return audioOnlyModePromise.then(() => {\n // enable audio poster mode after audio only mode is disabled\n this.enablePosterModeUI_();\n });\n }\n return Promise.resolve().then(() => {\n // enable audio poster mode\n this.enablePosterModeUI_();\n });\n }\n return Promise.resolve().then(() => {\n // disable audio poster mode\n this.disablePosterModeUI_();\n });\n }\n\n /**\n * A helper method for adding a {@link TextTrack} to our\n * {@link TextTrackList}.\n *\n * In addition to the W3C settings we allow adding additional info through options.\n *\n * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n *\n * @param {string} [kind]\n * the kind of TextTrack you are adding\n *\n * @param {string} [label]\n * the label to give the TextTrack label\n *\n * @param {string} [language]\n * the language to set on the TextTrack\n *\n * @return {TextTrack|undefined}\n * the TextTrack that was added or undefined\n * if there is no tech\n */\n addTextTrack(kind, label, language) {\n if (this.tech_) {\n return this.tech_.addTextTrack(kind, label, language);\n }\n }\n\n /**\n * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}.\n *\n * @param {Object} options\n * Options to pass to {@link HTMLTrackElement} during creation. See\n * {@link HTMLTrackElement} for object properties that you should use.\n *\n * @param {boolean} [manualCleanup=false] if set to true, the TextTrack will not be removed\n * from the TextTrackList and HtmlTrackElementList\n * after a source change\n *\n * @return { import('./tracks/html-track-element').default }\n * the HTMLTrackElement that was created and added\n * to the HtmlTrackElementList and the remote\n * TextTrackList\n *\n */\n addRemoteTextTrack(options, manualCleanup) {\n if (this.tech_) {\n return this.tech_.addRemoteTextTrack(options, manualCleanup);\n }\n }\n\n /**\n * Remove a remote {@link TextTrack} from the respective\n * {@link TextTrackList} and {@link HtmlTrackElementList}.\n *\n * @param {Object} track\n * Remote {@link TextTrack} to remove\n *\n * @return {undefined}\n * does not return anything\n */\n removeRemoteTextTrack(obj = {}) {\n let {\n track\n } = obj;\n if (!track) {\n track = obj;\n }\n\n // destructure the input into an object with a track argument, defaulting to arguments[0]\n // default the whole argument to an empty object if nothing was passed in\n\n if (this.tech_) {\n return this.tech_.removeRemoteTextTrack(track);\n }\n }\n\n /**\n * Gets available media playback quality metrics as specified by the W3C's Media\n * Playback Quality API.\n *\n * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n *\n * @return {Object|undefined}\n * An object with supported media playback quality metrics or undefined if there\n * is no tech or the tech does not support it.\n */\n getVideoPlaybackQuality() {\n return this.techGet_('getVideoPlaybackQuality');\n }\n\n /**\n * Get video width\n *\n * @return {number}\n * current video width\n */\n videoWidth() {\n return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n }\n\n /**\n * Get video height\n *\n * @return {number}\n * current video height\n */\n videoHeight() {\n return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n }\n\n /**\n * The player's language code.\n *\n * Changing the language will trigger\n * [languagechange]{@link Player#event:languagechange}\n * which Components can use to update control text.\n * ClickableComponent will update its control text by default on\n * [languagechange]{@link Player#event:languagechange}.\n *\n * @fires Player#languagechange\n *\n * @param {string} [code]\n * the language code to set the player to\n *\n * @return {string}\n * The current language code when getting\n */\n language(code) {\n if (code === undefined) {\n return this.language_;\n }\n if (this.language_ !== String(code).toLowerCase()) {\n this.language_ = String(code).toLowerCase();\n\n // during first init, it's possible some things won't be evented\n if (isEvented(this)) {\n /**\n * fires when the player language change\n *\n * @event Player#languagechange\n * @type {Event}\n */\n this.trigger('languagechange');\n }\n }\n }\n\n /**\n * Get the player's language dictionary\n * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n * Languages specified directly in the player options have precedence\n *\n * @return {Array}\n * An array of of supported languages\n */\n languages() {\n return merge$2(Player.prototype.options_.languages, this.languages_);\n }\n\n /**\n * returns a JavaScript object representing the current track\n * information. **DOES not return it as JSON**\n *\n * @return {Object}\n * Object representing the current of track info\n */\n toJSON() {\n const options = merge$2(this.options_);\n const tracks = options.tracks;\n options.tracks = [];\n for (let i = 0; i < tracks.length; i++) {\n let track = tracks[i];\n\n // deep merge tracks and null out player so no circular references\n track = merge$2(track);\n track.player = undefined;\n options.tracks[i] = track;\n }\n return options;\n }\n\n /**\n * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n * component) that immediately overlays the player with arbitrary\n * content and removes itself when closed.\n *\n * @param {string|Function|Element|Array|null} content\n * Same as {@link ModalDialog#content}'s param of the same name.\n * The most straight-forward usage is to provide a string or DOM\n * element.\n *\n * @param {Object} [options]\n * Extra options which will be passed on to the {@link ModalDialog}.\n *\n * @return {ModalDialog}\n * the {@link ModalDialog} that was created\n */\n createModal(content, options) {\n options = options || {};\n options.content = content || '';\n const modal = new ModalDialog(this, options);\n this.addChild(modal);\n modal.on('dispose', () => {\n this.removeChild(modal);\n });\n modal.open();\n return modal;\n }\n\n /**\n * Change breakpoint classes when the player resizes.\n *\n * @private\n */\n updateCurrentBreakpoint_() {\n if (!this.responsive()) {\n return;\n }\n const currentBreakpoint = this.currentBreakpoint();\n const currentWidth = this.currentWidth();\n for (let i = 0; i < BREAKPOINT_ORDER.length; i++) {\n const candidateBreakpoint = BREAKPOINT_ORDER[i];\n const maxWidth = this.breakpoints_[candidateBreakpoint];\n if (currentWidth <= maxWidth) {\n // The current breakpoint did not change, nothing to do.\n if (currentBreakpoint === candidateBreakpoint) {\n return;\n }\n\n // Only remove a class if there is a current breakpoint.\n if (currentBreakpoint) {\n this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n }\n this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n this.breakpoint_ = candidateBreakpoint;\n break;\n }\n }\n }\n\n /**\n * Removes the current breakpoint.\n *\n * @private\n */\n removeCurrentBreakpoint_() {\n const className = this.currentBreakpointClass();\n this.breakpoint_ = '';\n if (className) {\n this.removeClass(className);\n }\n }\n\n /**\n * Get or set breakpoints on the player.\n *\n * Calling this method with an object or `true` will remove any previous\n * custom breakpoints and start from the defaults again.\n *\n * @param {Object|boolean} [breakpoints]\n * If an object is given, it can be used to provide custom\n * breakpoints. If `true` is given, will set default breakpoints.\n * If this argument is not given, will simply return the current\n * breakpoints.\n *\n * @param {number} [breakpoints.tiny]\n * The maximum width for the \"vjs-layout-tiny\" class.\n *\n * @param {number} [breakpoints.xsmall]\n * The maximum width for the \"vjs-layout-x-small\" class.\n *\n * @param {number} [breakpoints.small]\n * The maximum width for the \"vjs-layout-small\" class.\n *\n * @param {number} [breakpoints.medium]\n * The maximum width for the \"vjs-layout-medium\" class.\n *\n * @param {number} [breakpoints.large]\n * The maximum width for the \"vjs-layout-large\" class.\n *\n * @param {number} [breakpoints.xlarge]\n * The maximum width for the \"vjs-layout-x-large\" class.\n *\n * @param {number} [breakpoints.huge]\n * The maximum width for the \"vjs-layout-huge\" class.\n *\n * @return {Object}\n * An object mapping breakpoint names to maximum width values.\n */\n breakpoints(breakpoints) {\n // Used as a getter.\n if (breakpoints === undefined) {\n return Object.assign(this.breakpoints_);\n }\n this.breakpoint_ = '';\n this.breakpoints_ = Object.assign({}, DEFAULT_BREAKPOINTS, breakpoints);\n\n // When breakpoint definitions change, we need to update the currently\n // selected breakpoint.\n this.updateCurrentBreakpoint_();\n\n // Clone the breakpoints before returning.\n return Object.assign(this.breakpoints_);\n }\n\n /**\n * Get or set a flag indicating whether or not this player should adjust\n * its UI based on its dimensions.\n *\n * @param {boolean} value\n * Should be `true` if the player should adjust its UI based on its\n * dimensions; otherwise, should be `false`.\n *\n * @return {boolean}\n * Will be `true` if this player should adjust its UI based on its\n * dimensions; otherwise, will be `false`.\n */\n responsive(value) {\n // Used as a getter.\n if (value === undefined) {\n return this.responsive_;\n }\n value = Boolean(value);\n const current = this.responsive_;\n\n // Nothing changed.\n if (value === current) {\n return;\n }\n\n // The value actually changed, set it.\n this.responsive_ = value;\n\n // Start listening for breakpoints and set the initial breakpoint if the\n // player is now responsive.\n if (value) {\n this.on('playerresize', this.boundUpdateCurrentBreakpoint_);\n this.updateCurrentBreakpoint_();\n\n // Stop listening for breakpoints if the player is no longer responsive.\n } else {\n this.off('playerresize', this.boundUpdateCurrentBreakpoint_);\n this.removeCurrentBreakpoint_();\n }\n return value;\n }\n\n /**\n * Get current breakpoint name, if any.\n *\n * @return {string}\n * If there is currently a breakpoint set, returns a the key from the\n * breakpoints object matching it. Otherwise, returns an empty string.\n */\n currentBreakpoint() {\n return this.breakpoint_;\n }\n\n /**\n * Get the current breakpoint class name.\n *\n * @return {string}\n * The matching class name (e.g. `\"vjs-layout-tiny\"` or\n * `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n * there is no current breakpoint.\n */\n currentBreakpointClass() {\n return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n }\n\n /**\n * An object that describes a single piece of media.\n *\n * Properties that are not part of this type description will be retained; so,\n * this can be viewed as a generic metadata storage mechanism as well.\n *\n * @see {@link https://wicg.github.io/mediasession/#the-mediametadata-interface}\n * @typedef {Object} Player~MediaObject\n *\n * @property {string} [album]\n * Unused, except if this object is passed to the `MediaSession`\n * API.\n *\n * @property {string} [artist]\n * Unused, except if this object is passed to the `MediaSession`\n * API.\n *\n * @property {Object[]} [artwork]\n * Unused, except if this object is passed to the `MediaSession`\n * API. If not specified, will be populated via the `poster`, if\n * available.\n *\n * @property {string} [poster]\n * URL to an image that will display before playback.\n *\n * @property {Tech~SourceObject|Tech~SourceObject[]|string} [src]\n * A single source object, an array of source objects, or a string\n * referencing a URL to a media source. It is _highly recommended_\n * that an object or array of objects is used here, so that source\n * selection algorithms can take the `type` into account.\n *\n * @property {string} [title]\n * Unused, except if this object is passed to the `MediaSession`\n * API.\n *\n * @property {Object[]} [textTracks]\n * An array of objects to be used to create text tracks, following\n * the {@link https://www.w3.org/TR/html50/embedded-content-0.html#the-track-element|native track element format}.\n * For ease of removal, these will be created as \"remote\" text\n * tracks and set to automatically clean up on source changes.\n *\n * These objects may have properties like `src`, `kind`, `label`,\n * and `language`, see {@link Tech#createRemoteTextTrack}.\n */\n\n /**\n * Populate the player using a {@link Player~MediaObject|MediaObject}.\n *\n * @param {Player~MediaObject} media\n * A media object.\n *\n * @param {Function} ready\n * A callback to be called when the player is ready.\n */\n loadMedia(media, ready) {\n if (!media || typeof media !== 'object') {\n return;\n }\n this.reset();\n\n // Clone the media object so it cannot be mutated from outside.\n this.cache_.media = merge$2(media);\n const {\n artist,\n artwork,\n description,\n poster,\n src,\n textTracks,\n title\n } = this.cache_.media;\n\n // If `artwork` is not given, create it using `poster`.\n if (!artwork && poster) {\n this.cache_.media.artwork = [{\n src: poster,\n type: getMimetype(poster)\n }];\n }\n if (src) {\n this.src(src);\n }\n if (poster) {\n this.poster(poster);\n }\n if (Array.isArray(textTracks)) {\n textTracks.forEach(tt => this.addRemoteTextTrack(tt, false));\n }\n if (this.titleBar) {\n this.titleBar.update({\n title,\n description: description || artist || ''\n });\n }\n this.ready(ready);\n }\n\n /**\n * Get a clone of the current {@link Player~MediaObject} for this player.\n *\n * If the `loadMedia` method has not been used, will attempt to return a\n * {@link Player~MediaObject} based on the current state of the player.\n *\n * @return {Player~MediaObject}\n */\n getMedia() {\n if (!this.cache_.media) {\n const poster = this.poster();\n const src = this.currentSources();\n const textTracks = Array.prototype.map.call(this.remoteTextTracks(), tt => ({\n kind: tt.kind,\n label: tt.label,\n language: tt.language,\n src: tt.src\n }));\n const media = {\n src,\n textTracks\n };\n if (poster) {\n media.poster = poster;\n media.artwork = [{\n src: media.poster,\n type: getMimetype(media.poster)\n }];\n }\n return media;\n }\n return merge$2(this.cache_.media);\n }\n\n /**\n * Gets tag settings\n *\n * @param {Element} tag\n * The player tag\n *\n * @return {Object}\n * An object containing all of the settings\n * for a player tag\n */\n static getTagSettings(tag) {\n const baseOptions = {\n sources: [],\n tracks: []\n };\n const tagOptions = getAttributes(tag);\n const dataSetup = tagOptions['data-setup'];\n if (hasClass(tag, 'vjs-fill')) {\n tagOptions.fill = true;\n }\n if (hasClass(tag, 'vjs-fluid')) {\n tagOptions.fluid = true;\n }\n\n // Check if data-setup attr exists.\n if (dataSetup !== null) {\n // Parse options JSON\n // If empty string, make it a parsable json object.\n const [err, data] = tuple(dataSetup || '{}');\n if (err) {\n log$1.error(err);\n }\n Object.assign(tagOptions, data);\n }\n Object.assign(baseOptions, tagOptions);\n\n // Get tag children settings\n if (tag.hasChildNodes()) {\n const children = tag.childNodes;\n for (let i = 0, j = children.length; i < j; i++) {\n const child = children[i];\n // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n const childName = child.nodeName.toLowerCase();\n if (childName === 'source') {\n baseOptions.sources.push(getAttributes(child));\n } else if (childName === 'track') {\n baseOptions.tracks.push(getAttributes(child));\n }\n }\n }\n return baseOptions;\n }\n\n /**\n * Set debug mode to enable/disable logs at info level.\n *\n * @param {boolean} enabled\n * @fires Player#debugon\n * @fires Player#debugoff\n */\n debug(enabled) {\n if (enabled === undefined) {\n return this.debugEnabled_;\n }\n if (enabled) {\n this.trigger('debugon');\n this.previousLogLevel_ = this.log.level;\n this.log.level('debug');\n this.debugEnabled_ = true;\n } else {\n this.trigger('debugoff');\n this.log.level(this.previousLogLevel_);\n this.previousLogLevel_ = undefined;\n this.debugEnabled_ = false;\n }\n }\n\n /**\n * Set or get current playback rates.\n * Takes an array and updates the playback rates menu with the new items.\n * Pass in an empty array to hide the menu.\n * Values other than arrays are ignored.\n *\n * @fires Player#playbackrateschange\n * @param {number[]} newRates\n * The new rates that the playback rates menu should update to.\n * An empty array will hide the menu\n * @return {number[]} When used as a getter will return the current playback rates\n */\n playbackRates(newRates) {\n if (newRates === undefined) {\n return this.cache_.playbackRates;\n }\n\n // ignore any value that isn't an array\n if (!Array.isArray(newRates)) {\n return;\n }\n\n // ignore any arrays that don't only contain numbers\n if (!newRates.every(rate => typeof rate === 'number')) {\n return;\n }\n this.cache_.playbackRates = newRates;\n\n /**\n * fires when the playback rates in a player are changed\n *\n * @event Player#playbackrateschange\n * @type {Event}\n */\n this.trigger('playbackrateschange');\n }\n }\n\n /**\n * Get the {@link VideoTrackList}\n *\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n * the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n /**\n * Get the {@link AudioTrackList}\n *\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n * the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n /**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n * the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n /**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n * The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n /**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n * The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\n ALL.names.forEach(function (name) {\n const props = ALL[name];\n Player.prototype[props.getterName] = function () {\n if (this.tech_) {\n return this.tech_[props.getterName]();\n }\n\n // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n // these will be passed to the tech during loading\n this[props.privateName] = this[props.privateName] || new props.ListClass();\n return this[props.privateName];\n };\n });\n\n /**\n * Get or set the `Player`'s crossorigin option. For the HTML5 player, this\n * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n * behavior.\n *\n * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n *\n * @param {string} [value]\n * The value to set the `Player`'s crossorigin to. If an argument is\n * given, must be one of `anonymous` or `use-credentials`.\n *\n * @return {string|undefined}\n * - The current crossorigin value of the `Player` when getting.\n * - undefined when setting\n */\n Player.prototype.crossorigin = Player.prototype.crossOrigin;\n\n /**\n * Global enumeration of players.\n *\n * The keys are the player IDs and the values are either the {@link Player}\n * instance or `null` for disposed players.\n *\n * @type {Object}\n */\n Player.players = {};\n const navigator = window.navigator;\n\n /*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\n Player.prototype.options_ = {\n // Default order of fallback technology\n techOrder: Tech.defaultTechOrder_,\n html5: {},\n // enable sourceset by default\n enableSourceset: true,\n // default inactivity timeout\n inactivityTimeout: 2000,\n // default playback rates\n playbackRates: [],\n // Add playback rate selection by adding rates\n // 'playbackRates': [0.5, 1, 1.5, 2],\n liveui: false,\n // Included control sets\n children: ['mediaLoader', 'posterImage', 'titleBar', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'liveTracker', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],\n language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n // locales and their language translations\n languages: {},\n // Default message to show when a video cannot be played.\n notSupportedMessage: 'No compatible source was found for this media.',\n normalizeAutoplay: false,\n fullscreen: {\n options: {\n navigationUI: 'hide'\n }\n },\n breakpoints: {},\n responsive: false,\n audioOnlyMode: false,\n audioPosterMode: false\n };\n [\n /**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n 'ended',\n /**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n 'seeking',\n /**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n 'seekable',\n /**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n * The element has not yet been initialised. All attributes are in\n * their initial states.\n * - NETWORK_IDLE (numeric value 1)\n * The element's resource selection algorithm is active and has\n * selected a resource, but it is not actually using the network at\n * this time.\n * - NETWORK_LOADING (numeric value 2)\n * The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n * The element's resource selection algorithm is active, but it has\n * not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n 'networkState',\n /**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n * No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n * Enough of the resource has been obtained that the duration of the\n * resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n * Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n * Data for the immediate current playback position is available, as\n * well as enough data for the user agent to advance the current\n * playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n * The user agent estimates that enough data is available for\n * playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n 'readyState'].forEach(function (fn) {\n Player.prototype[fn] = function () {\n return this.techGet_(fn);\n };\n });\n TECH_EVENTS_RETRIGGER.forEach(function (event) {\n Player.prototype[`handleTech${toTitleCase$1(event)}_`] = function () {\n return this.trigger(event);\n };\n });\n\n /**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {Event}\n */\n\n /**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {Event}\n */\n\n /**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {Event}\n */\n\n /**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {Event}\n */\n\n /**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param {string} name\n * The name of a plugin.\n *\n * @return {boolean}\n * Whether or not this player has the requested plugin available.\n */\n\n /**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param {string} name\n * The name of a plugin.\n *\n * @return {boolean}\n * Whether or not this player is using the requested plugin.\n */\n\n Component$1.registerComponent('Player', Player);\n\n /**\n * @file plugin.js\n */\n\n /**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\n const BASE_PLUGIN_NAME = 'plugin';\n\n /**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type {string}\n */\n const PLUGIN_CACHE_KEY = 'activePlugins_';\n\n /**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type {Object}\n */\n const pluginStorage = {};\n\n /**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param {string} name\n * The name of a plugin.\n *\n * @return {boolean}\n * Whether or not the plugin has been registered.\n */\n const pluginExists = name => pluginStorage.hasOwnProperty(name);\n\n /**\n * Get a single registered plugin by name.\n *\n * @private\n * @param {string} name\n * The name of a plugin.\n *\n * @return {typeof Plugin|Function|undefined}\n * The plugin (or undefined).\n */\n const getPlugin = name => pluginExists(name) ? pluginStorage[name] : undefined;\n\n /**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param {Player} player\n * A Video.js player instance.\n *\n * @param {string} name\n * The name of a plugin.\n */\n const markPluginAsActive = (player, name) => {\n player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n player[PLUGIN_CACHE_KEY][name] = true;\n };\n\n /**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param {Player} player\n * A Video.js player instance.\n *\n * @param {Plugin~PluginEventHash} hash\n * A plugin event hash.\n *\n * @param {boolean} [before]\n * If true, prefixes the event name with \"before\". In other words,\n * use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\n const triggerSetupEvent = (player, hash, before) => {\n const eventName = (before ? 'before' : '') + 'pluginsetup';\n player.trigger(eventName, hash);\n player.trigger(eventName + ':' + hash.name, hash);\n };\n\n /**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param {string} name\n * The name of the plugin.\n *\n * @param {Function} plugin\n * The basic plugin.\n *\n * @return {Function}\n * A wrapper function for the given plugin.\n */\n const createBasicPlugin = function (name, plugin) {\n const basicPluginWrapper = function () {\n // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n // regardless, but we want the hash to be consistent with the hash provided\n // for advanced plugins.\n //\n // The only potentially counter-intuitive thing here is the `instance` in\n // the \"pluginsetup\" event is the value returned by the `plugin` function.\n triggerSetupEvent(this, {\n name,\n plugin,\n instance: null\n }, true);\n const instance = plugin.apply(this, arguments);\n markPluginAsActive(this, name);\n triggerSetupEvent(this, {\n name,\n plugin,\n instance\n });\n return instance;\n };\n Object.keys(plugin).forEach(function (prop) {\n basicPluginWrapper[prop] = plugin[prop];\n });\n return basicPluginWrapper;\n };\n\n /**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param {string} name\n * The name of the plugin.\n *\n * @param {Plugin} PluginSubClass\n * The advanced plugin.\n *\n * @return {Function}\n */\n const createPluginFactory = (name, PluginSubClass) => {\n // Add a `name` property to the plugin prototype so that each plugin can\n // refer to itself by name.\n PluginSubClass.prototype.name = name;\n return function (...args) {\n triggerSetupEvent(this, {\n name,\n plugin: PluginSubClass,\n instance: null\n }, true);\n const instance = new PluginSubClass(...[this, ...args]);\n\n // The plugin is replaced by a function that returns the current instance.\n this[name] = () => instance;\n triggerSetupEvent(this, instance.getEventHash());\n return instance;\n };\n };\n\n /**\n * Parent class for all advanced plugins.\n *\n * @mixes module:evented~EventedMixin\n * @mixes module:stateful~StatefulMixin\n * @fires Player#beforepluginsetup\n * @fires Player#beforepluginsetup:$name\n * @fires Player#pluginsetup\n * @fires Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws {Error}\n * If attempting to instantiate the base {@link Plugin} class\n * directly instead of via a sub-class.\n */\n class Plugin {\n /**\n * Creates an instance of this class.\n *\n * Sub-classes should call `super` to ensure plugins are properly initialized.\n *\n * @param {Player} player\n * A Video.js player instance.\n */\n constructor(player) {\n if (this.constructor === Plugin) {\n throw new Error('Plugin must be sub-classed; not directly instantiated.');\n }\n this.player = player;\n if (!this.log) {\n this.log = this.player.log.createLogger(this.name);\n }\n\n // Make this object evented, but remove the added `trigger` method so we\n // use the prototype version instead.\n evented(this);\n delete this.trigger;\n stateful(this, this.constructor.defaultState);\n markPluginAsActive(player, this.name);\n\n // Auto-bind the dispose method so we can use it as a listener and unbind\n // it later easily.\n this.dispose = this.dispose.bind(this);\n\n // If the player is disposed, dispose the plugin.\n player.on('dispose', this.dispose);\n }\n\n /**\n * Get the version of the plugin that was set on <pluginName>.VERSION\n */\n version() {\n return this.constructor.VERSION;\n }\n\n /**\n * Each event triggered by plugins includes a hash of additional data with\n * conventional properties.\n *\n * This returns that object or mutates an existing hash.\n *\n * @param {Object} [hash={}]\n * An object to be used as event an event hash.\n *\n * @return {Plugin~PluginEventHash}\n * An event hash object with provided properties mixed-in.\n */\n getEventHash(hash = {}) {\n hash.name = this.name;\n hash.plugin = this.constructor;\n hash.instance = this;\n return hash;\n }\n\n /**\n * Triggers an event on the plugin object and overrides\n * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n *\n * @param {string|Object} event\n * An event type or an object with a type property.\n *\n * @param {Object} [hash={}]\n * Additional data hash to merge with a\n * {@link Plugin~PluginEventHash|PluginEventHash}.\n *\n * @return {boolean}\n * Whether or not default was prevented.\n */\n trigger(event, hash = {}) {\n return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n }\n\n /**\n * Handles \"statechanged\" events on the plugin. No-op by default, override by\n * subclassing.\n *\n * @abstract\n * @param {Event} e\n * An event object provided by a \"statechanged\" event.\n *\n * @param {Object} e.changes\n * An object describing changes that occurred with the \"statechanged\"\n * event.\n */\n handleStateChanged(e) {}\n\n /**\n * Disposes a plugin.\n *\n * Subclasses can override this if they want, but for the sake of safety,\n * it's probably best to subscribe the \"dispose\" event.\n *\n * @fires Plugin#dispose\n */\n dispose() {\n const {\n name,\n player\n } = this;\n\n /**\n * Signals that a advanced plugin is about to be disposed.\n *\n * @event Plugin#dispose\n * @type {Event}\n */\n this.trigger('dispose');\n this.off();\n player.off('dispose', this.dispose);\n\n // Eliminate any possible sources of leaking memory by clearing up\n // references between the player and the plugin instance and nulling out\n // the plugin's state and replacing methods with a function that throws.\n player[PLUGIN_CACHE_KEY][name] = false;\n this.player = this.state = null;\n\n // Finally, replace the plugin name on the player with a new factory\n // function, so that the plugin is ready to be set up again.\n player[name] = createPluginFactory(name, pluginStorage[name]);\n }\n\n /**\n * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n *\n * @param {string|Function} plugin\n * If a string, matches the name of a plugin. If a function, will be\n * tested directly.\n *\n * @return {boolean}\n * Whether or not a plugin is a basic plugin.\n */\n static isBasic(plugin) {\n const p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n }\n\n /**\n * Register a Video.js plugin.\n *\n * @param {string} name\n * The name of the plugin to be registered. Must be a string and\n * must not match an existing plugin or a method on the `Player`\n * prototype.\n *\n * @param {typeof Plugin|Function} plugin\n * A sub-class of `Plugin` or a function for basic plugins.\n *\n * @return {typeof Plugin|Function}\n * For advanced plugins, a factory function for that plugin. For\n * basic plugins, a wrapper function that initializes the plugin.\n */\n static registerPlugin(name, plugin) {\n if (typeof name !== 'string') {\n throw new Error(`Illegal plugin name, \"${name}\", must be a string, was ${typeof name}.`);\n }\n if (pluginExists(name)) {\n log$1.warn(`A plugin named \"${name}\" already exists. You may want to avoid re-registering plugins!`);\n } else if (Player.prototype.hasOwnProperty(name)) {\n throw new Error(`Illegal plugin name, \"${name}\", cannot share a name with an existing player method!`);\n }\n if (typeof plugin !== 'function') {\n throw new Error(`Illegal plugin for \"${name}\", must be a function, was ${typeof plugin}.`);\n }\n pluginStorage[name] = plugin;\n\n // Add a player prototype method for all sub-classed plugins (but not for\n // the base Plugin class).\n if (name !== BASE_PLUGIN_NAME) {\n if (Plugin.isBasic(plugin)) {\n Player.prototype[name] = createBasicPlugin(name, plugin);\n } else {\n Player.prototype[name] = createPluginFactory(name, plugin);\n }\n }\n return plugin;\n }\n\n /**\n * De-register a Video.js plugin.\n *\n * @param {string} name\n * The name of the plugin to be de-registered. Must be a string that\n * matches an existing plugin.\n *\n * @throws {Error}\n * If an attempt is made to de-register the base plugin.\n */\n static deregisterPlugin(name) {\n if (name === BASE_PLUGIN_NAME) {\n throw new Error('Cannot de-register base plugin.');\n }\n if (pluginExists(name)) {\n delete pluginStorage[name];\n delete Player.prototype[name];\n }\n }\n\n /**\n * Gets an object containing multiple Video.js plugins.\n *\n * @param {Array} [names]\n * If provided, should be an array of plugin names. Defaults to _all_\n * plugin names.\n *\n * @return {Object|undefined}\n * An object containing plugin(s) associated with their name(s) or\n * `undefined` if no matching plugins exist).\n */\n static getPlugins(names = Object.keys(pluginStorage)) {\n let result;\n names.forEach(name => {\n const plugin = getPlugin(name);\n if (plugin) {\n result = result || {};\n result[name] = plugin;\n }\n });\n return result;\n }\n\n /**\n * Gets a plugin's version, if available\n *\n * @param {string} name\n * The name of a plugin.\n *\n * @return {string}\n * The plugin's version or an empty string.\n */\n static getPluginVersion(name) {\n const plugin = getPlugin(name);\n return plugin && plugin.VERSION || '';\n }\n }\n\n /**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method getPlugin\n * @memberOf Plugin\n * @param {string} name\n * The name of a plugin.\n *\n * @returns {typeof Plugin|Function|undefined}\n * The plugin (or `undefined`).\n */\n Plugin.getPlugin = getPlugin;\n\n /**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\n Plugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\n Plugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n\n /**\n * Documented in player.js\n *\n * @ignore\n */\n Player.prototype.usingPlugin = function (name) {\n return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n };\n\n /**\n * Documented in player.js\n *\n * @ignore\n */\n Player.prototype.hasPlugin = function (name) {\n return !!pluginExists(name);\n };\n\n /**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event Player#beforepluginsetup\n * @type {Plugin~PluginEventHash}\n */\n\n /**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event Player#beforepluginsetup:$name\n * @type {Plugin~PluginEventHash}\n */\n\n /**\n * Signals that a plugin has just been set up on a player.\n *\n * @event Player#pluginsetup\n * @type {Plugin~PluginEventHash}\n */\n\n /**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event Player#pluginsetup:$name\n * @type {Plugin~PluginEventHash}\n */\n\n /**\n * @typedef {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n * For basic plugins, the return value of the plugin function. For\n * advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n * The name of the plugin.\n *\n * @property {string} plugin\n * For basic plugins, the plugin function. For advanced plugins, the\n * plugin class/constructor.\n */\n\n /**\n * @file deprecate.js\n * @module deprecate\n */\n\n /**\n * Decorate a function with a deprecation message the first time it is called.\n *\n * @param {string} message\n * A deprecation message to log the first time the returned function\n * is called.\n *\n * @param {Function} fn\n * The function to be deprecated.\n *\n * @return {Function}\n * A wrapper function that will log a deprecation warning the first\n * time it is called. The return value will be the return value of\n * the wrapped function.\n */\n function deprecate(message, fn) {\n let warned = false;\n return function (...args) {\n if (!warned) {\n log$1.warn(message);\n }\n warned = true;\n return fn.apply(this, args);\n };\n }\n\n /**\n * Internal function used to mark a function as deprecated in the next major\n * version with consistent messaging.\n *\n * @param {number} major The major version where it will be removed\n * @param {string} oldName The old function name\n * @param {string} newName The new function name\n * @param {Function} fn The function to deprecate\n * @return {Function} The decorated function\n */\n function deprecateForMajor(major, oldName, newName, fn) {\n return deprecate(`${oldName} is deprecated and will be removed in ${major}.0; please use ${newName} instead.`, fn);\n }\n\n /**\n * @file video.js\n * @module videojs\n */\n\n /**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @private\n * @param {string} id\n * A string, maybe with a leading `#`.\n *\n * @return {string}\n * The string, without any leading `#`.\n */\n const normalizeId = id => id.indexOf('#') === 0 ? id.slice(1) : id;\n\n /**\n * A callback that is called when a component is ready. Does not have any\n * parameters and any callback value will be ignored. See: {@link Component~ReadyCallback}\n *\n * @callback ReadyCallback\n */\n\n /**\n * The `videojs()` function doubles as the main function for users to create a\n * {@link Player} instance as well as the main library namespace.\n *\n * It can also be used as a getter for a pre-existing {@link Player} instance.\n * However, we _strongly_ recommend using `videojs.getPlayer()` for this\n * purpose because it avoids any potential for unintended initialization.\n *\n * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n * of our JSDoc template, we cannot properly document this as both a function\n * and a namespace, so its function signature is documented here.\n *\n * #### Arguments\n * ##### id\n * string|Element, **required**\n *\n * Video element or video element ID.\n *\n * ##### options\n * Object, optional\n *\n * Options object for providing settings.\n * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * ##### ready\n * {@link Component~ReadyCallback}, optional\n *\n * A function to be called when the {@link Player} and {@link Tech} are ready.\n *\n * #### Return Value\n *\n * The `videojs()` function returns a {@link Player} instance.\n *\n * @namespace\n *\n * @borrows AudioTrack as AudioTrack\n * @borrows Component.getComponent as getComponent\n * @borrows module:events.on as on\n * @borrows module:events.one as one\n * @borrows module:events.off as off\n * @borrows module:events.trigger as trigger\n * @borrows EventTarget as EventTarget\n * @borrows module:middleware.use as use\n * @borrows Player.players as players\n * @borrows Plugin.registerPlugin as registerPlugin\n * @borrows Plugin.deregisterPlugin as deregisterPlugin\n * @borrows Plugin.getPlugins as getPlugins\n * @borrows Plugin.getPlugin as getPlugin\n * @borrows Plugin.getPluginVersion as getPluginVersion\n * @borrows Tech.getTech as getTech\n * @borrows Tech.registerTech as registerTech\n * @borrows TextTrack as TextTrack\n * @borrows VideoTrack as VideoTrack\n *\n * @param {string|Element} id\n * Video element or video element ID.\n *\n * @param {Object} [options]\n * Options object for providing settings.\n * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * @param {ReadyCallback} [ready]\n * A function to be called when the {@link Player} and {@link Tech} are\n * ready.\n *\n * @return {Player}\n * The `videojs()` function returns a {@link Player|Player} instance.\n */\n function videojs(id, options, ready) {\n let player = videojs.getPlayer(id);\n if (player) {\n if (options) {\n log$1.warn(`Player \"${id}\" is already initialised. Options will not be applied.`);\n }\n if (ready) {\n player.ready(ready);\n }\n return player;\n }\n const el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n if (!isEl(el)) {\n throw new TypeError('The element or ID supplied is not valid. (videojs)');\n }\n\n // document.body.contains(el) will only check if el is contained within that one document.\n // This causes problems for elements in iframes.\n // Instead, use the element's ownerDocument instead of the global document.\n // This will make sure that the element is indeed in the dom of that document.\n // Additionally, check that the document in question has a default view.\n // If the document is no longer attached to the dom, the defaultView of the document will be null.\n if (!el.ownerDocument.defaultView || !el.ownerDocument.body.contains(el)) {\n log$1.warn('The element supplied is not included in the DOM');\n }\n options = options || {};\n\n // Store a copy of the el before modification, if it is to be restored in destroy()\n // If div ingest, store the parent div\n if (options.restoreEl === true) {\n options.restoreEl = (el.parentNode && el.parentNode.hasAttribute('data-vjs-player') ? el.parentNode : el).cloneNode(true);\n }\n hooks('beforesetup').forEach(hookFunction => {\n const opts = hookFunction(el, merge$2(options));\n if (!isObject$1(opts) || Array.isArray(opts)) {\n log$1.error('please return an object in beforesetup hooks');\n return;\n }\n options = merge$2(options, opts);\n });\n\n // We get the current \"Player\" component here in case an integration has\n // replaced it with a custom player.\n const PlayerComponent = Component$1.getComponent('Player');\n player = new PlayerComponent(el, options, ready);\n hooks('setup').forEach(hookFunction => hookFunction(player));\n return player;\n }\n videojs.hooks_ = hooks_;\n videojs.hooks = hooks;\n videojs.hook = hook;\n videojs.hookOnce = hookOnce;\n videojs.removeHook = removeHook;\n\n // Add default styles\n if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n let style = $('.vjs-styles-defaults');\n if (!style) {\n style = createStyleElement('vjs-styles-defaults');\n const head = $('head');\n if (head) {\n head.insertBefore(style, head.firstChild);\n }\n setTextContent(style, `\n .video-js {\n width: 300px;\n height: 150px;\n }\n\n .vjs-fluid:not(.vjs-audio-only-mode) {\n padding-top: 56.25%\n }\n `);\n }\n }\n\n // Run Auto-load players\n // You have to wait at least once in case this script is loaded after your\n // video in the DOM (weird behavior only with minified version)\n autoSetupTimeout(1, videojs);\n\n /**\n * Current Video.js version. Follows [semantic versioning](https://semver.org/).\n *\n * @type {string}\n */\n videojs.VERSION = version$5;\n\n /**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\n videojs.options = Player.prototype.options_;\n\n /**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n * The created players\n */\n videojs.getPlayers = () => Player.players;\n\n /**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param {string|Element} id\n * An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n * or a string matching the `id` of such an element.\n *\n * @return {Player|undefined}\n * A player instance or `undefined` if there is no player instance\n * matching the argument.\n */\n videojs.getPlayer = id => {\n const players = Player.players;\n let tag;\n if (typeof id === 'string') {\n const nId = normalizeId(id);\n const player = players[nId];\n if (player) {\n return player;\n }\n tag = $('#' + nId);\n } else {\n tag = id;\n }\n if (isEl(tag)) {\n const {\n player,\n playerId\n } = tag;\n\n // Element may have a `player` property referring to an already created\n // player instance. If so, return that.\n if (player || players[playerId]) {\n return player || players[playerId];\n }\n }\n };\n\n /**\n * Returns an array of all current players.\n *\n * @return {Array}\n * An array of all players. The array will be in the order that\n * `Object.keys` provides, which could potentially vary between\n * JavaScript engines.\n *\n */\n videojs.getAllPlayers = () =>\n // Disposed players leave a key with a `null` value, so we need to make sure\n // we filter those out.\n Object.keys(Player.players).map(k => Player.players[k]).filter(Boolean);\n videojs.players = Player.players;\n videojs.getComponent = Component$1.getComponent;\n\n /**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n * The class name of the component\n *\n * @param {Component} comp\n * The component class\n *\n * @return {Component}\n * The newly registered component\n */\n videojs.registerComponent = (name, comp) => {\n if (Tech.isTech(comp)) {\n log$1.warn(`The ${name} tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)`);\n }\n Component$1.registerComponent.call(Component$1, name, comp);\n };\n videojs.getTech = Tech.getTech;\n videojs.registerTech = Tech.registerTech;\n videojs.use = use;\n\n /**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @property {object} middleware.TERMINATOR\n */\n Object.defineProperty(videojs, 'middleware', {\n value: {},\n writeable: false,\n enumerable: true\n });\n Object.defineProperty(videojs.middleware, 'TERMINATOR', {\n value: TERMINATOR,\n writeable: false,\n enumerable: true\n });\n\n /**\n * A reference to the {@link module:browser|browser utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:browser|browser}\n */\n videojs.browser = browser;\n\n /**\n * A reference to the {@link module:obj|obj utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:obj|obj}\n */\n videojs.obj = Obj;\n\n /**\n * Deprecated reference to the {@link module:obj.merge|merge function}\n *\n * @type {Function}\n * @see {@link module:obj.merge|merge}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.obj.merge instead.\n */\n videojs.mergeOptions = deprecateForMajor(9, 'videojs.mergeOptions', 'videojs.obj.merge', merge$2);\n\n /**\n * Deprecated reference to the {@link module:obj.defineLazyProperty|defineLazyProperty function}\n *\n * @type {Function}\n * @see {@link module:obj.defineLazyProperty|defineLazyProperty}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.obj.defineLazyProperty instead.\n */\n videojs.defineLazyProperty = deprecateForMajor(9, 'videojs.defineLazyProperty', 'videojs.obj.defineLazyProperty', defineLazyProperty);\n\n /**\n * Deprecated reference to the {@link module:fn.bind_|fn.bind_ function}\n *\n * @type {Function}\n * @see {@link module:fn.bind_|fn.bind_}\n * @deprecated Deprecated and will be removed in 9.0. Please use native Function.prototype.bind instead.\n */\n videojs.bind = deprecateForMajor(9, 'videojs.bind', 'native Function.prototype.bind', bind_);\n videojs.registerPlugin = Plugin.registerPlugin;\n videojs.deregisterPlugin = Plugin.deregisterPlugin;\n\n /**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated Deprecated and will be removed in 9.0. Use videojs.registerPlugin() instead.\n *\n * @param {string} name\n * The plugin name\n *\n * @param {Plugin|Function} plugin\n * The plugin sub-class or function\n */\n videojs.plugin = (name, plugin) => {\n log$1.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n return Plugin.registerPlugin(name, plugin);\n };\n videojs.getPlugins = Plugin.getPlugins;\n videojs.getPlugin = Plugin.getPlugin;\n videojs.getPluginVersion = Plugin.getPluginVersion;\n\n /**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n * The language code or dictionary property\n *\n * @param {Object} data\n * The data values to be translated\n *\n * @return {Object}\n * The resulting language dictionary object\n */\n videojs.addLanguage = function (code, data) {\n code = ('' + code).toLowerCase();\n videojs.options.languages = merge$2(videojs.options.languages, {\n [code]: data\n });\n return videojs.options.languages[code];\n };\n\n /**\n * A reference to the {@link module:log|log utility module} as an object.\n *\n * @type {Function}\n * @see {@link module:log|log}\n */\n videojs.log = log$1;\n videojs.createLogger = createLogger;\n\n /**\n * A reference to the {@link module:time|time utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:time|time}\n */\n videojs.time = Time;\n\n /**\n * Deprecated reference to the {@link module:time.createTimeRanges|createTimeRanges function}\n *\n * @type {Function}\n * @see {@link module:time.createTimeRanges|createTimeRanges}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.createTimeRanges instead.\n */\n videojs.createTimeRange = deprecateForMajor(9, 'videojs.createTimeRange', 'videojs.time.createTimeRanges', createTimeRanges$1);\n\n /**\n * Deprecated reference to the {@link module:time.createTimeRanges|createTimeRanges function}\n *\n * @type {Function}\n * @see {@link module:time.createTimeRanges|createTimeRanges}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.createTimeRanges instead.\n */\n videojs.createTimeRanges = deprecateForMajor(9, 'videojs.createTimeRanges', 'videojs.time.createTimeRanges', createTimeRanges$1);\n\n /**\n * Deprecated reference to the {@link module:time.formatTime|formatTime function}\n *\n * @type {Function}\n * @see {@link module:time.formatTime|formatTime}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.format instead.\n */\n videojs.formatTime = deprecateForMajor(9, 'videojs.formatTime', 'videojs.time.formatTime', formatTime);\n\n /**\n * Deprecated reference to the {@link module:time.setFormatTime|setFormatTime function}\n *\n * @type {Function}\n * @see {@link module:time.setFormatTime|setFormatTime}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.setFormat instead.\n */\n videojs.setFormatTime = deprecateForMajor(9, 'videojs.setFormatTime', 'videojs.time.setFormatTime', setFormatTime);\n\n /**\n * Deprecated reference to the {@link module:time.resetFormatTime|resetFormatTime function}\n *\n * @type {Function}\n * @see {@link module:time.resetFormatTime|resetFormatTime}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.time.resetFormat instead.\n */\n videojs.resetFormatTime = deprecateForMajor(9, 'videojs.resetFormatTime', 'videojs.time.resetFormatTime', resetFormatTime);\n\n /**\n * Deprecated reference to the {@link module:url.parseUrl|Url.parseUrl function}\n *\n * @type {Function}\n * @see {@link module:url.parseUrl|parseUrl}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.url.parseUrl instead.\n */\n videojs.parseUrl = deprecateForMajor(9, 'videojs.parseUrl', 'videojs.url.parseUrl', parseUrl);\n\n /**\n * Deprecated reference to the {@link module:url.isCrossOrigin|Url.isCrossOrigin function}\n *\n * @type {Function}\n * @see {@link module:url.isCrossOrigin|isCrossOrigin}\n * @deprecated Deprecated and will be removed in 9.0. Please use videojs.url.isCrossOrigin instead.\n */\n videojs.isCrossOrigin = deprecateForMajor(9, 'videojs.isCrossOrigin', 'videojs.url.isCrossOrigin', isCrossOrigin);\n videojs.EventTarget = EventTarget$2;\n videojs.any = any;\n videojs.on = on;\n videojs.one = one;\n videojs.off = off;\n videojs.trigger = trigger;\n\n /**\n * A cross-browser XMLHttpRequest wrapper.\n *\n * @function\n * @param {Object} options\n * Settings for the request.\n *\n * @return {XMLHttpRequest|XDomainRequest}\n * The request object.\n *\n * @see https://github.com/Raynos/xhr\n */\n videojs.xhr = lib;\n videojs.TextTrack = TextTrack;\n videojs.AudioTrack = AudioTrack;\n videojs.VideoTrack = VideoTrack;\n ['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(k => {\n videojs[k] = function () {\n log$1.warn(`videojs.${k}() is deprecated; use videojs.dom.${k}() instead`);\n return Dom[k].apply(null, arguments);\n };\n });\n videojs.computedStyle = deprecateForMajor(9, 'videojs.computedStyle', 'videojs.dom.computedStyle', computedStyle);\n\n /**\n * A reference to the {@link module:dom|DOM utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:dom|dom}\n */\n videojs.dom = Dom;\n\n /**\n * A reference to the {@link module:fn|fn utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:fn|fn}\n */\n videojs.fn = Fn;\n\n /**\n * A reference to the {@link module:num|num utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:num|num}\n */\n videojs.num = Num;\n\n /**\n * A reference to the {@link module:str|str utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:str|str}\n */\n videojs.str = Str;\n\n /**\n * A reference to the {@link module:url|URL utility module} as an object.\n *\n * @type {Object}\n * @see {@link module:url|url}\n */\n videojs.url = Url;\n\n createCommonjsModule(function (module, exports) {\n /*! @name videojs-contrib-quality-levels @version 3.0.0 @license Apache-2.0 */\n (function (global, factory) {\n module.exports = factory(videojs) ;\n })(commonjsGlobal, function (videojs) {\n\n function _interopDefaultLegacy(e) {\n return e && typeof e === 'object' && 'default' in e ? e : {\n 'default': e\n };\n }\n var videojs__default = /*#__PURE__*/_interopDefaultLegacy(videojs);\n\n /**\n * A single QualityLevel.\n *\n * interface QualityLevel {\n * readonly attribute DOMString id;\n * attribute DOMString label;\n * readonly attribute long width;\n * readonly attribute long height;\n * readonly attribute long bitrate;\n * attribute boolean enabled;\n * };\n *\n * @class QualityLevel\n */\n class QualityLevel {\n /**\n * Creates a QualityLevel\n *\n * @param {Representation|Object} representation The representation of the quality level\n * @param {string} representation.id Unique id of the QualityLevel\n * @param {number=} representation.width Resolution width of the QualityLevel\n * @param {number=} representation.height Resolution height of the QualityLevel\n * @param {number} representation.bandwidth Bitrate of the QualityLevel\n * @param {number=} representation.frameRate Frame-rate of the QualityLevel\n * @param {Function} representation.enabled Callback to enable/disable QualityLevel\n */\n constructor(representation) {\n let level = this; // eslint-disable-line\n\n level.id = representation.id;\n level.label = level.id;\n level.width = representation.width;\n level.height = representation.height;\n level.bitrate = representation.bandwidth;\n level.frameRate = representation.frameRate;\n level.enabled_ = representation.enabled;\n Object.defineProperty(level, 'enabled', {\n /**\n * Get whether the QualityLevel is enabled.\n *\n * @return {boolean} True if the QualityLevel is enabled.\n */\n get() {\n return level.enabled_();\n },\n /**\n * Enable or disable the QualityLevel.\n *\n * @param {boolean} enable true to enable QualityLevel, false to disable.\n */\n set(enable) {\n level.enabled_(enable);\n }\n });\n return level;\n }\n }\n\n /**\n * A list of QualityLevels.\n *\n * interface QualityLevelList : EventTarget {\n * getter QualityLevel (unsigned long index);\n * readonly attribute unsigned long length;\n * readonly attribute long selectedIndex;\n *\n * void addQualityLevel(QualityLevel qualityLevel)\n * void removeQualityLevel(QualityLevel remove)\n * QualityLevel? getQualityLevelById(DOMString id);\n *\n * attribute EventHandler onchange;\n * attribute EventHandler onaddqualitylevel;\n * attribute EventHandler onremovequalitylevel;\n * };\n *\n * @extends videojs.EventTarget\n * @class QualityLevelList\n */\n\n class QualityLevelList extends videojs__default['default'].EventTarget {\n constructor() {\n super();\n let list = this; // eslint-disable-line\n\n list.levels_ = [];\n list.selectedIndex_ = -1;\n /**\n * Get the index of the currently selected QualityLevel.\n *\n * @returns {number} The index of the selected QualityLevel. -1 if none selected.\n * @readonly\n */\n\n Object.defineProperty(list, 'selectedIndex', {\n get() {\n return list.selectedIndex_;\n }\n });\n /**\n * Get the length of the list of QualityLevels.\n *\n * @returns {number} The length of the list.\n * @readonly\n */\n\n Object.defineProperty(list, 'length', {\n get() {\n return list.levels_.length;\n }\n });\n return list;\n }\n /**\n * Adds a quality level to the list.\n *\n * @param {Representation|Object} representation The representation of the quality level\n * @param {string} representation.id Unique id of the QualityLevel\n * @param {number=} representation.width Resolution width of the QualityLevel\n * @param {number=} representation.height Resolution height of the QualityLevel\n * @param {number} representation.bandwidth Bitrate of the QualityLevel\n * @param {number=} representation.frameRate Frame-rate of the QualityLevel\n * @param {Function} representation.enabled Callback to enable/disable QualityLevel\n * @return {QualityLevel} the QualityLevel added to the list\n * @method addQualityLevel\n */\n\n addQualityLevel(representation) {\n let qualityLevel = this.getQualityLevelById(representation.id); // Do not add duplicate quality levels\n\n if (qualityLevel) {\n return qualityLevel;\n }\n const index = this.levels_.length;\n qualityLevel = new QualityLevel(representation);\n if (!('' + index in this)) {\n Object.defineProperty(this, index, {\n get() {\n return this.levels_[index];\n }\n });\n }\n this.levels_.push(qualityLevel);\n this.trigger({\n qualityLevel,\n type: 'addqualitylevel'\n });\n return qualityLevel;\n }\n /**\n * Removes a quality level from the list.\n *\n * @param {QualityLevel} remove QualityLevel to remove to the list.\n * @return {QualityLevel|null} the QualityLevel removed or null if nothing removed\n * @method removeQualityLevel\n */\n\n removeQualityLevel(qualityLevel) {\n let removed = null;\n for (let i = 0, l = this.length; i < l; i++) {\n if (this[i] === qualityLevel) {\n removed = this.levels_.splice(i, 1)[0];\n if (this.selectedIndex_ === i) {\n this.selectedIndex_ = -1;\n } else if (this.selectedIndex_ > i) {\n this.selectedIndex_--;\n }\n break;\n }\n }\n if (removed) {\n this.trigger({\n qualityLevel,\n type: 'removequalitylevel'\n });\n }\n return removed;\n }\n /**\n * Searches for a QualityLevel with the given id.\n *\n * @param {string} id The id of the QualityLevel to find.\n * @return {QualityLevel|null} The QualityLevel with id, or null if not found.\n * @method getQualityLevelById\n */\n\n getQualityLevelById(id) {\n for (let i = 0, l = this.length; i < l; i++) {\n const level = this[i];\n if (level.id === id) {\n return level;\n }\n }\n return null;\n }\n /**\n * Resets the list of QualityLevels to empty\n *\n * @method dispose\n */\n\n dispose() {\n this.selectedIndex_ = -1;\n this.levels_.length = 0;\n }\n }\n /**\n * change - The selected QualityLevel has changed.\n * addqualitylevel - A QualityLevel has been added to the QualityLevelList.\n * removequalitylevel - A QualityLevel has been removed from the QualityLevelList.\n */\n\n QualityLevelList.prototype.allowedEvents_ = {\n change: 'change',\n addqualitylevel: 'addqualitylevel',\n removequalitylevel: 'removequalitylevel'\n }; // emulate attribute EventHandler support to allow for feature detection\n\n for (const event in QualityLevelList.prototype.allowedEvents_) {\n QualityLevelList.prototype['on' + event] = null;\n }\n var version = \"3.0.0\";\n const registerPlugin = videojs__default['default'].registerPlugin || videojs__default['default'].plugin;\n /**\n * Initialization function for the qualityLevels plugin. Sets up the QualityLevelList and\n * event handlers.\n *\n * @param {Player} player Player object.\n * @param {Object} options Plugin options object.\n * @function initPlugin\n */\n\n const initPlugin = function (player, options) {\n const originalPluginFn = player.qualityLevels;\n const qualityLevelList = new QualityLevelList();\n const disposeHandler = function () {\n qualityLevelList.dispose();\n player.qualityLevels = originalPluginFn;\n player.off('dispose', disposeHandler);\n };\n player.on('dispose', disposeHandler);\n player.qualityLevels = () => qualityLevelList;\n player.qualityLevels.VERSION = version;\n return qualityLevelList;\n };\n /**\n * A video.js plugin.\n *\n * In the plugin function, the value of `this` is a video.js `Player`\n * instance. You cannot rely on the player being in a \"ready\" state here,\n * depending on how the plugin is invoked. This may or may not be important\n * to you; if not, remove the wait for \"ready\"!\n *\n * @param {Object} options Plugin options object\n * @function qualityLevels\n */\n\n const qualityLevels = function (options) {\n return initPlugin(this, videojs__default['default'].mergeOptions({}, options));\n }; // Register the plugin with video.js.\n\n registerPlugin('qualityLevels', qualityLevels); // Include the version number.\n\n qualityLevels.VERSION = version;\n return qualityLevels;\n });\n });\n\n var urlToolkit = createCommonjsModule(function (module, exports) {\n // see https://tools.ietf.org/html/rfc1808\n\n (function (root) {\n var URL_REGEX = /^(?=((?:[a-zA-Z0-9+\\-.]+:)?))\\1(?=((?:\\/\\/[^\\/?#]*)?))\\2(?=((?:(?:[^?#\\/]*\\/)*[^;?#\\/]*)?))\\3((?:;[^?#]*)?)(\\?[^#]*)?(#[^]*)?$/;\n var FIRST_SEGMENT_REGEX = /^(?=([^\\/?#]*))\\1([^]*)$/;\n var SLASH_DOT_REGEX = /(?:\\/|^)\\.(?=\\/)/g;\n var SLASH_DOT_DOT_REGEX = /(?:\\/|^)\\.\\.\\/(?!\\.\\.\\/)[^\\/]*(?=\\/)/g;\n var URLToolkit = {\n // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //\n // E.g\n // With opts.alwaysNormalize = false (default, spec compliant)\n // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g\n // With opts.alwaysNormalize = true (not spec compliant)\n // http://a.com/b/cd + /e/f/../g => http://a.com/e/g\n buildAbsoluteURL: function (baseURL, relativeURL, opts) {\n opts = opts || {};\n // remove any remaining space and CRLF\n baseURL = baseURL.trim();\n relativeURL = relativeURL.trim();\n if (!relativeURL) {\n // 2a) If the embedded URL is entirely empty, it inherits the\n // entire base URL (i.e., is set equal to the base URL)\n // and we are done.\n if (!opts.alwaysNormalize) {\n return baseURL;\n }\n var basePartsForNormalise = URLToolkit.parseURL(baseURL);\n if (!basePartsForNormalise) {\n throw new Error('Error trying to parse base URL.');\n }\n basePartsForNormalise.path = URLToolkit.normalizePath(basePartsForNormalise.path);\n return URLToolkit.buildURLFromParts(basePartsForNormalise);\n }\n var relativeParts = URLToolkit.parseURL(relativeURL);\n if (!relativeParts) {\n throw new Error('Error trying to parse relative URL.');\n }\n if (relativeParts.scheme) {\n // 2b) If the embedded URL starts with a scheme name, it is\n // interpreted as an absolute URL and we are done.\n if (!opts.alwaysNormalize) {\n return relativeURL;\n }\n relativeParts.path = URLToolkit.normalizePath(relativeParts.path);\n return URLToolkit.buildURLFromParts(relativeParts);\n }\n var baseParts = URLToolkit.parseURL(baseURL);\n if (!baseParts) {\n throw new Error('Error trying to parse base URL.');\n }\n if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {\n // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc\n // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'\n var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);\n baseParts.netLoc = pathParts[1];\n baseParts.path = pathParts[2];\n }\n if (baseParts.netLoc && !baseParts.path) {\n baseParts.path = '/';\n }\n var builtParts = {\n // 2c) Otherwise, the embedded URL inherits the scheme of\n // the base URL.\n scheme: baseParts.scheme,\n netLoc: relativeParts.netLoc,\n path: null,\n params: relativeParts.params,\n query: relativeParts.query,\n fragment: relativeParts.fragment\n };\n if (!relativeParts.netLoc) {\n // 3) If the embedded URL's <net_loc> is non-empty, we skip to\n // Step 7. Otherwise, the embedded URL inherits the <net_loc>\n // (if any) of the base URL.\n builtParts.netLoc = baseParts.netLoc;\n // 4) If the embedded URL path is preceded by a slash \"/\", the\n // path is not relative and we skip to Step 7.\n if (relativeParts.path[0] !== '/') {\n if (!relativeParts.path) {\n // 5) If the embedded URL path is empty (and not preceded by a\n // slash), then the embedded URL inherits the base URL path\n builtParts.path = baseParts.path;\n // 5a) if the embedded URL's <params> is non-empty, we skip to\n // step 7; otherwise, it inherits the <params> of the base\n // URL (if any) and\n if (!relativeParts.params) {\n builtParts.params = baseParts.params;\n // 5b) if the embedded URL's <query> is non-empty, we skip to\n // step 7; otherwise, it inherits the <query> of the base\n // URL (if any) and we skip to step 7.\n if (!relativeParts.query) {\n builtParts.query = baseParts.query;\n }\n }\n } else {\n // 6) The last segment of the base URL's path (anything\n // following the rightmost slash \"/\", or the entire path if no\n // slash is present) is removed and the embedded URL's path is\n // appended in its place.\n var baseURLPath = baseParts.path;\n var newPath = baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) + relativeParts.path;\n builtParts.path = URLToolkit.normalizePath(newPath);\n }\n }\n }\n if (builtParts.path === null) {\n builtParts.path = opts.alwaysNormalize ? URLToolkit.normalizePath(relativeParts.path) : relativeParts.path;\n }\n return URLToolkit.buildURLFromParts(builtParts);\n },\n parseURL: function (url) {\n var parts = URL_REGEX.exec(url);\n if (!parts) {\n return null;\n }\n return {\n scheme: parts[1] || '',\n netLoc: parts[2] || '',\n path: parts[3] || '',\n params: parts[4] || '',\n query: parts[5] || '',\n fragment: parts[6] || ''\n };\n },\n normalizePath: function (path) {\n // The following operations are\n // then applied, in order, to the new path:\n // 6a) All occurrences of \"./\", where \".\" is a complete path\n // segment, are removed.\n // 6b) If the path ends with \".\" as a complete path segment,\n // that \".\" is removed.\n path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');\n // 6c) All occurrences of \"<segment>/../\", where <segment> is a\n // complete path segment not equal to \"..\", are removed.\n // Removal of these path segments is performed iteratively,\n // removing the leftmost matching pattern on each iteration,\n // until no matching pattern remains.\n // 6d) If the path ends with \"<segment>/..\", where <segment> is a\n // complete path segment not equal to \"..\", that\n // \"<segment>/..\" is removed.\n while (path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length) {}\n return path.split('').reverse().join('');\n },\n buildURLFromParts: function (parts) {\n return parts.scheme + parts.netLoc + parts.path + parts.params + parts.query + parts.fragment;\n }\n };\n module.exports = URLToolkit;\n })();\n });\n\n var DEFAULT_LOCATION$1 = 'http://example.com';\n var resolveUrl$2 = function resolveUrl(baseUrl, relativeUrl) {\n // return early if we don't need to resolve\n if (/^[a-z]+:/i.test(relativeUrl)) {\n return relativeUrl;\n } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location\n\n if (/^data:/.test(baseUrl)) {\n baseUrl = window.location && window.location.href || '';\n } // IE11 supports URL but not the URL constructor\n // feature detect the behavior we want\n\n var nativeURL = typeof window.URL === 'function';\n var protocolLess = /^\\/\\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node)\n // and if baseUrl isn't an absolute url\n\n var removeLocation = !window.location && !/\\/\\//i.test(baseUrl); // if the base URL is relative then combine with the current location\n\n if (nativeURL) {\n baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION$1);\n } else if (!/\\/\\//i.test(baseUrl)) {\n baseUrl = urlToolkit.buildAbsoluteURL(window.location && window.location.href || '', baseUrl);\n }\n if (nativeURL) {\n var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol\n // and if we're location-less, remove the location\n // otherwise, return the url unmodified\n\n if (removeLocation) {\n return newUrl.href.slice(DEFAULT_LOCATION$1.length);\n } else if (protocolLess) {\n return newUrl.href.slice(newUrl.protocol.length);\n }\n return newUrl.href;\n }\n return urlToolkit.buildAbsoluteURL(baseUrl, relativeUrl);\n };\n\n /**\n * @file stream.js\n */\n\n /**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\n var Stream = /*#__PURE__*/function () {\n function Stream() {\n this.listeners = {};\n }\n /**\n * Add a listener for a specified event type.\n *\n * @param {string} type the event name\n * @param {Function} listener the callback to be invoked when an event of\n * the specified type occurs\n */\n\n var _proto = Stream.prototype;\n _proto.on = function on(type, listener) {\n if (!this.listeners[type]) {\n this.listeners[type] = [];\n }\n this.listeners[type].push(listener);\n }\n /**\n * Remove a listener for a specified event type.\n *\n * @param {string} type the event name\n * @param {Function} listener a function previously registered for this\n * type of event through `on`\n * @return {boolean} if we could turn it off or not\n */;\n\n _proto.off = function off(type, listener) {\n if (!this.listeners[type]) {\n return false;\n }\n var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n // In Video.js we slice listener functions\n // on trigger so that it does not mess up the order\n // while we loop through.\n //\n // Here we slice on off so that the loop in trigger\n // can continue using it's old reference to loop without\n // messing up the order.\n\n this.listeners[type] = this.listeners[type].slice(0);\n this.listeners[type].splice(index, 1);\n return index > -1;\n }\n /**\n * Trigger an event of the specified type on this stream. Any additional\n * arguments to this function are passed as parameters to event listeners.\n *\n * @param {string} type the event name\n */;\n\n _proto.trigger = function trigger(type) {\n var callbacks = this.listeners[type];\n if (!callbacks) {\n return;\n } // Slicing the arguments on every invocation of this method\n // can add a significant amount of overhead. Avoid the\n // intermediate object creation for the common case of a\n // single callback argument\n\n if (arguments.length === 2) {\n var length = callbacks.length;\n for (var i = 0; i < length; ++i) {\n callbacks[i].call(this, arguments[1]);\n }\n } else {\n var args = Array.prototype.slice.call(arguments, 1);\n var _length = callbacks.length;\n for (var _i = 0; _i < _length; ++_i) {\n callbacks[_i].apply(this, args);\n }\n }\n }\n /**\n * Destroys the stream and cleans up.\n */;\n\n _proto.dispose = function dispose() {\n this.listeners = {};\n }\n /**\n * Forwards all `data` events on this stream to the destination stream. The\n * destination stream should provide a method `push` to receive the data\n * events as they arrive.\n *\n * @param {Stream} destination the stream that will receive all `data` events\n * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n */;\n\n _proto.pipe = function pipe(destination) {\n this.on('data', function (data) {\n destination.push(data);\n });\n };\n return Stream;\n }();\n\n var atob$1 = function atob(s) {\n return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');\n };\n function decodeB64ToUint8Array$1(b64Text) {\n var decodedString = atob$1(b64Text);\n var array = new Uint8Array(decodedString.length);\n for (var i = 0; i < decodedString.length; i++) {\n array[i] = decodedString.charCodeAt(i);\n }\n return array;\n }\n\n /*! @name m3u8-parser @version 6.0.0 @license Apache-2.0 */\n\n /**\n * @file m3u8/line-stream.js\n */\n /**\n * A stream that buffers string input and generates a `data` event for each\n * line.\n *\n * @class LineStream\n * @extends Stream\n */\n\n class LineStream extends Stream {\n constructor() {\n super();\n this.buffer = '';\n }\n /**\n * Add new data to be parsed.\n *\n * @param {string} data the text to process\n */\n\n push(data) {\n let nextNewline;\n this.buffer += data;\n nextNewline = this.buffer.indexOf('\\n');\n for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\\n')) {\n this.trigger('data', this.buffer.substring(0, nextNewline));\n this.buffer = this.buffer.substring(nextNewline + 1);\n }\n }\n }\n const TAB = String.fromCharCode(0x09);\n const parseByterange = function (byterangeString) {\n // optionally match and capture 0+ digits before `@`\n // optionally match and capture 0+ digits after `@`\n const match = /([0-9.]*)?@?([0-9.]*)?/.exec(byterangeString || '');\n const result = {};\n if (match[1]) {\n result.length = parseInt(match[1], 10);\n }\n if (match[2]) {\n result.offset = parseInt(match[2], 10);\n }\n return result;\n };\n /**\n * \"forgiving\" attribute list psuedo-grammar:\n * attributes -> keyvalue (',' keyvalue)*\n * keyvalue -> key '=' value\n * key -> [^=]*\n * value -> '\"' [^\"]* '\"' | [^,]*\n */\n\n const attributeSeparator = function () {\n const key = '[^=]*';\n const value = '\"[^\"]*\"|[^,]*';\n const keyvalue = '(?:' + key + ')=(?:' + value + ')';\n return new RegExp('(?:^|,)(' + keyvalue + ')');\n };\n /**\n * Parse attributes from a line given the separator\n *\n * @param {string} attributes the attribute line to parse\n */\n\n const parseAttributes$1 = function (attributes) {\n const result = {};\n if (!attributes) {\n return result;\n } // split the string using attributes as the separator\n\n const attrs = attributes.split(attributeSeparator());\n let i = attrs.length;\n let attr;\n while (i--) {\n // filter out unmatched portions of the string\n if (attrs[i] === '') {\n continue;\n } // split the key and value\n\n attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value\n\n attr[0] = attr[0].replace(/^\\s+|\\s+$/g, '');\n attr[1] = attr[1].replace(/^\\s+|\\s+$/g, '');\n attr[1] = attr[1].replace(/^['\"](.*)['\"]$/g, '$1');\n result[attr[0]] = attr[1];\n }\n return result;\n };\n /**\n * A line-level M3U8 parser event stream. It expects to receive input one\n * line at a time and performs a context-free parse of its contents. A stream\n * interpretation of a manifest can be useful if the manifest is expected to\n * be too large to fit comfortably into memory or the entirety of the input\n * is not immediately available. Otherwise, it's probably much easier to work\n * with a regular `Parser` object.\n *\n * Produces `data` events with an object that captures the parser's\n * interpretation of the input. That object has a property `tag` that is one\n * of `uri`, `comment`, or `tag`. URIs only have a single additional\n * property, `line`, which captures the entirety of the input without\n * interpretation. Comments similarly have a single additional property\n * `text` which is the input without the leading `#`.\n *\n * Tags always have a property `tagType` which is the lower-cased version of\n * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,\n * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized\n * tags are given the tag type `unknown` and a single additional property\n * `data` with the remainder of the input.\n *\n * @class ParseStream\n * @extends Stream\n */\n\n class ParseStream extends Stream {\n constructor() {\n super();\n this.customParsers = [];\n this.tagMappers = [];\n }\n /**\n * Parses an additional line of input.\n *\n * @param {string} line a single line of an M3U8 file to parse\n */\n\n push(line) {\n let match;\n let event; // strip whitespace\n\n line = line.trim();\n if (line.length === 0) {\n // ignore empty lines\n return;\n } // URIs\n\n if (line[0] !== '#') {\n this.trigger('data', {\n type: 'uri',\n uri: line\n });\n return;\n } // map tags\n\n const newLines = this.tagMappers.reduce((acc, mapper) => {\n const mappedLine = mapper(line); // skip if unchanged\n\n if (mappedLine === line) {\n return acc;\n }\n return acc.concat([mappedLine]);\n }, [line]);\n newLines.forEach(newLine => {\n for (let i = 0; i < this.customParsers.length; i++) {\n if (this.customParsers[i].call(this, newLine)) {\n return;\n }\n } // Comments\n\n if (newLine.indexOf('#EXT') !== 0) {\n this.trigger('data', {\n type: 'comment',\n text: newLine.slice(1)\n });\n return;\n } // strip off any carriage returns here so the regex matching\n // doesn't have to account for them.\n\n newLine = newLine.replace('\\r', ''); // Tags\n\n match = /^#EXTM3U/.exec(newLine);\n if (match) {\n this.trigger('data', {\n type: 'tag',\n tagType: 'm3u'\n });\n return;\n }\n match = /^#EXTINF:([0-9\\.]*)?,?(.*)?$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'inf'\n };\n if (match[1]) {\n event.duration = parseFloat(match[1]);\n }\n if (match[2]) {\n event.title = match[2];\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-TARGETDURATION:([0-9.]*)?/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'targetduration'\n };\n if (match[1]) {\n event.duration = parseInt(match[1], 10);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-VERSION:([0-9.]*)?/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'version'\n };\n if (match[1]) {\n event.version = parseInt(match[1], 10);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-MEDIA-SEQUENCE:(\\-?[0-9.]*)?/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'media-sequence'\n };\n if (match[1]) {\n event.number = parseInt(match[1], 10);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-DISCONTINUITY-SEQUENCE:(\\-?[0-9.]*)?/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'discontinuity-sequence'\n };\n if (match[1]) {\n event.number = parseInt(match[1], 10);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-PLAYLIST-TYPE:(.*)?$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'playlist-type'\n };\n if (match[1]) {\n event.playlistType = match[1];\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-BYTERANGE:(.*)?$/.exec(newLine);\n if (match) {\n event = _extends$1(parseByterange(match[1]), {\n type: 'tag',\n tagType: 'byterange'\n });\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-ALLOW-CACHE:(YES|NO)?/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'allow-cache'\n };\n if (match[1]) {\n event.allowed = !/NO/.test(match[1]);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-MAP:(.*)$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'map'\n };\n if (match[1]) {\n const attributes = parseAttributes$1(match[1]);\n if (attributes.URI) {\n event.uri = attributes.URI;\n }\n if (attributes.BYTERANGE) {\n event.byterange = parseByterange(attributes.BYTERANGE);\n }\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-STREAM-INF:(.*)$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'stream-inf'\n };\n if (match[1]) {\n event.attributes = parseAttributes$1(match[1]);\n if (event.attributes.RESOLUTION) {\n const split = event.attributes.RESOLUTION.split('x');\n const resolution = {};\n if (split[0]) {\n resolution.width = parseInt(split[0], 10);\n }\n if (split[1]) {\n resolution.height = parseInt(split[1], 10);\n }\n event.attributes.RESOLUTION = resolution;\n }\n if (event.attributes.BANDWIDTH) {\n event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);\n }\n if (event.attributes['FRAME-RATE']) {\n event.attributes['FRAME-RATE'] = parseFloat(event.attributes['FRAME-RATE']);\n }\n if (event.attributes['PROGRAM-ID']) {\n event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);\n }\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-MEDIA:(.*)$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'media'\n };\n if (match[1]) {\n event.attributes = parseAttributes$1(match[1]);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-ENDLIST/.exec(newLine);\n if (match) {\n this.trigger('data', {\n type: 'tag',\n tagType: 'endlist'\n });\n return;\n }\n match = /^#EXT-X-DISCONTINUITY/.exec(newLine);\n if (match) {\n this.trigger('data', {\n type: 'tag',\n tagType: 'discontinuity'\n });\n return;\n }\n match = /^#EXT-X-PROGRAM-DATE-TIME:(.*)$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'program-date-time'\n };\n if (match[1]) {\n event.dateTimeString = match[1];\n event.dateTimeObject = new Date(match[1]);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-KEY:(.*)$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'key'\n };\n if (match[1]) {\n event.attributes = parseAttributes$1(match[1]); // parse the IV string into a Uint32Array\n\n if (event.attributes.IV) {\n if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {\n event.attributes.IV = event.attributes.IV.substring(2);\n }\n event.attributes.IV = event.attributes.IV.match(/.{8}/g);\n event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);\n event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);\n event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);\n event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);\n event.attributes.IV = new Uint32Array(event.attributes.IV);\n }\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-START:(.*)$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'start'\n };\n if (match[1]) {\n event.attributes = parseAttributes$1(match[1]);\n event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);\n event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-CUE-OUT-CONT:(.*)?$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'cue-out-cont'\n };\n if (match[1]) {\n event.data = match[1];\n } else {\n event.data = '';\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-CUE-OUT:(.*)?$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'cue-out'\n };\n if (match[1]) {\n event.data = match[1];\n } else {\n event.data = '';\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-CUE-IN:(.*)?$/.exec(newLine);\n if (match) {\n event = {\n type: 'tag',\n tagType: 'cue-in'\n };\n if (match[1]) {\n event.data = match[1];\n } else {\n event.data = '';\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-SKIP:(.*)$/.exec(newLine);\n if (match && match[1]) {\n event = {\n type: 'tag',\n tagType: 'skip'\n };\n event.attributes = parseAttributes$1(match[1]);\n if (event.attributes.hasOwnProperty('SKIPPED-SEGMENTS')) {\n event.attributes['SKIPPED-SEGMENTS'] = parseInt(event.attributes['SKIPPED-SEGMENTS'], 10);\n }\n if (event.attributes.hasOwnProperty('RECENTLY-REMOVED-DATERANGES')) {\n event.attributes['RECENTLY-REMOVED-DATERANGES'] = event.attributes['RECENTLY-REMOVED-DATERANGES'].split(TAB);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-PART:(.*)$/.exec(newLine);\n if (match && match[1]) {\n event = {\n type: 'tag',\n tagType: 'part'\n };\n event.attributes = parseAttributes$1(match[1]);\n ['DURATION'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = parseFloat(event.attributes[key]);\n }\n });\n ['INDEPENDENT', 'GAP'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = /YES/.test(event.attributes[key]);\n }\n });\n if (event.attributes.hasOwnProperty('BYTERANGE')) {\n event.attributes.byterange = parseByterange(event.attributes.BYTERANGE);\n }\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-SERVER-CONTROL:(.*)$/.exec(newLine);\n if (match && match[1]) {\n event = {\n type: 'tag',\n tagType: 'server-control'\n };\n event.attributes = parseAttributes$1(match[1]);\n ['CAN-SKIP-UNTIL', 'PART-HOLD-BACK', 'HOLD-BACK'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = parseFloat(event.attributes[key]);\n }\n });\n ['CAN-SKIP-DATERANGES', 'CAN-BLOCK-RELOAD'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = /YES/.test(event.attributes[key]);\n }\n });\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-PART-INF:(.*)$/.exec(newLine);\n if (match && match[1]) {\n event = {\n type: 'tag',\n tagType: 'part-inf'\n };\n event.attributes = parseAttributes$1(match[1]);\n ['PART-TARGET'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = parseFloat(event.attributes[key]);\n }\n });\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-PRELOAD-HINT:(.*)$/.exec(newLine);\n if (match && match[1]) {\n event = {\n type: 'tag',\n tagType: 'preload-hint'\n };\n event.attributes = parseAttributes$1(match[1]);\n ['BYTERANGE-START', 'BYTERANGE-LENGTH'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = parseInt(event.attributes[key], 10);\n const subkey = key === 'BYTERANGE-LENGTH' ? 'length' : 'offset';\n event.attributes.byterange = event.attributes.byterange || {};\n event.attributes.byterange[subkey] = event.attributes[key]; // only keep the parsed byterange object.\n\n delete event.attributes[key];\n }\n });\n this.trigger('data', event);\n return;\n }\n match = /^#EXT-X-RENDITION-REPORT:(.*)$/.exec(newLine);\n if (match && match[1]) {\n event = {\n type: 'tag',\n tagType: 'rendition-report'\n };\n event.attributes = parseAttributes$1(match[1]);\n ['LAST-MSN', 'LAST-PART'].forEach(function (key) {\n if (event.attributes.hasOwnProperty(key)) {\n event.attributes[key] = parseInt(event.attributes[key], 10);\n }\n });\n this.trigger('data', event);\n return;\n } // unknown tag type\n\n this.trigger('data', {\n type: 'tag',\n data: newLine.slice(4)\n });\n });\n }\n /**\n * Add a parser for custom headers\n *\n * @param {Object} options a map of options for the added parser\n * @param {RegExp} options.expression a regular expression to match the custom header\n * @param {string} options.customType the custom type to register to the output\n * @param {Function} [options.dataParser] function to parse the line into an object\n * @param {boolean} [options.segment] should tag data be attached to the segment object\n */\n\n addParser({\n expression,\n customType,\n dataParser,\n segment\n }) {\n if (typeof dataParser !== 'function') {\n dataParser = line => line;\n }\n this.customParsers.push(line => {\n const match = expression.exec(line);\n if (match) {\n this.trigger('data', {\n type: 'custom',\n data: dataParser(line),\n customType,\n segment\n });\n return true;\n }\n });\n }\n /**\n * Add a custom header mapper\n *\n * @param {Object} options\n * @param {RegExp} options.expression a regular expression to match the custom header\n * @param {Function} options.map function to translate tag into a different tag\n */\n\n addTagMapper({\n expression,\n map\n }) {\n const mapFn = line => {\n if (expression.test(line)) {\n return map(line);\n }\n return line;\n };\n this.tagMappers.push(mapFn);\n }\n }\n const camelCase = str => str.toLowerCase().replace(/-(\\w)/g, a => a[1].toUpperCase());\n const camelCaseKeys = function (attributes) {\n const result = {};\n Object.keys(attributes).forEach(function (key) {\n result[camelCase(key)] = attributes[key];\n });\n return result;\n }; // set SERVER-CONTROL hold back based upon targetDuration and partTargetDuration\n // we need this helper because defaults are based upon targetDuration and\n // partTargetDuration being set, but they may not be if SERVER-CONTROL appears before\n // target durations are set.\n\n const setHoldBack = function (manifest) {\n const {\n serverControl,\n targetDuration,\n partTargetDuration\n } = manifest;\n if (!serverControl) {\n return;\n }\n const tag = '#EXT-X-SERVER-CONTROL';\n const hb = 'holdBack';\n const phb = 'partHoldBack';\n const minTargetDuration = targetDuration && targetDuration * 3;\n const minPartDuration = partTargetDuration && partTargetDuration * 2;\n if (targetDuration && !serverControl.hasOwnProperty(hb)) {\n serverControl[hb] = minTargetDuration;\n this.trigger('info', {\n message: `${tag} defaulting HOLD-BACK to targetDuration * 3 (${minTargetDuration}).`\n });\n }\n if (minTargetDuration && serverControl[hb] < minTargetDuration) {\n this.trigger('warn', {\n message: `${tag} clamping HOLD-BACK (${serverControl[hb]}) to targetDuration * 3 (${minTargetDuration})`\n });\n serverControl[hb] = minTargetDuration;\n } // default no part hold back to part target duration * 3\n\n if (partTargetDuration && !serverControl.hasOwnProperty(phb)) {\n serverControl[phb] = partTargetDuration * 3;\n this.trigger('info', {\n message: `${tag} defaulting PART-HOLD-BACK to partTargetDuration * 3 (${serverControl[phb]}).`\n });\n } // if part hold back is too small default it to part target duration * 2\n\n if (partTargetDuration && serverControl[phb] < minPartDuration) {\n this.trigger('warn', {\n message: `${tag} clamping PART-HOLD-BACK (${serverControl[phb]}) to partTargetDuration * 2 (${minPartDuration}).`\n });\n serverControl[phb] = minPartDuration;\n }\n };\n /**\n * A parser for M3U8 files. The current interpretation of the input is\n * exposed as a property `manifest` on parser objects. It's just two lines to\n * create and parse a manifest once you have the contents available as a string:\n *\n * ```js\n * var parser = new m3u8.Parser();\n * parser.push(xhr.responseText);\n * ```\n *\n * New input can later be applied to update the manifest object by calling\n * `push` again.\n *\n * The parser attempts to create a usable manifest object even if the\n * underlying input is somewhat nonsensical. It emits `info` and `warning`\n * events during the parse if it encounters input that seems invalid or\n * requires some property of the manifest object to be defaulted.\n *\n * @class Parser\n * @extends Stream\n */\n\n class Parser extends Stream {\n constructor() {\n super();\n this.lineStream = new LineStream();\n this.parseStream = new ParseStream();\n this.lineStream.pipe(this.parseStream);\n /* eslint-disable consistent-this */\n\n const self = this;\n /* eslint-enable consistent-this */\n\n const uris = [];\n let currentUri = {}; // if specified, the active EXT-X-MAP definition\n\n let currentMap; // if specified, the active decryption key\n\n let key;\n let hasParts = false;\n const noop = function () {};\n const defaultMediaGroups = {\n 'AUDIO': {},\n 'VIDEO': {},\n 'CLOSED-CAPTIONS': {},\n 'SUBTITLES': {}\n }; // This is the Widevine UUID from DASH IF IOP. The same exact string is\n // used in MPDs with Widevine encrypted streams.\n\n const widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities\n\n let currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data\n\n this.manifest = {\n allowCache: true,\n discontinuityStarts: [],\n segments: []\n }; // keep track of the last seen segment's byte range end, as segments are not required\n // to provide the offset, in which case it defaults to the next byte after the\n // previous segment\n\n let lastByterangeEnd = 0; // keep track of the last seen part's byte range end.\n\n let lastPartByterangeEnd = 0;\n this.on('end', () => {\n // only add preloadSegment if we don't yet have a uri for it.\n // and we actually have parts/preloadHints\n if (currentUri.uri || !currentUri.parts && !currentUri.preloadHints) {\n return;\n }\n if (!currentUri.map && currentMap) {\n currentUri.map = currentMap;\n }\n if (!currentUri.key && key) {\n currentUri.key = key;\n }\n if (!currentUri.timeline && typeof currentTimeline === 'number') {\n currentUri.timeline = currentTimeline;\n }\n this.manifest.preloadSegment = currentUri;\n }); // update the manifest with the m3u8 entry from the parse stream\n\n this.parseStream.on('data', function (entry) {\n let mediaGroup;\n let rendition;\n ({\n tag() {\n // switch based on the tag type\n (({\n version() {\n if (entry.version) {\n this.manifest.version = entry.version;\n }\n },\n 'allow-cache'() {\n this.manifest.allowCache = entry.allowed;\n if (!('allowed' in entry)) {\n this.trigger('info', {\n message: 'defaulting allowCache to YES'\n });\n this.manifest.allowCache = true;\n }\n },\n byterange() {\n const byterange = {};\n if ('length' in entry) {\n currentUri.byterange = byterange;\n byterange.length = entry.length;\n if (!('offset' in entry)) {\n /*\n * From the latest spec (as of this writing):\n * https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.2\n *\n * Same text since EXT-X-BYTERANGE's introduction in draft 7:\n * https://tools.ietf.org/html/draft-pantos-http-live-streaming-07#section-3.3.1)\n *\n * \"If o [offset] is not present, the sub-range begins at the next byte\n * following the sub-range of the previous media segment.\"\n */\n entry.offset = lastByterangeEnd;\n }\n }\n if ('offset' in entry) {\n currentUri.byterange = byterange;\n byterange.offset = entry.offset;\n }\n lastByterangeEnd = byterange.offset + byterange.length;\n },\n endlist() {\n this.manifest.endList = true;\n },\n inf() {\n if (!('mediaSequence' in this.manifest)) {\n this.manifest.mediaSequence = 0;\n this.trigger('info', {\n message: 'defaulting media sequence to zero'\n });\n }\n if (!('discontinuitySequence' in this.manifest)) {\n this.manifest.discontinuitySequence = 0;\n this.trigger('info', {\n message: 'defaulting discontinuity sequence to zero'\n });\n }\n if (entry.duration > 0) {\n currentUri.duration = entry.duration;\n }\n if (entry.duration === 0) {\n currentUri.duration = 0.01;\n this.trigger('info', {\n message: 'updating zero segment duration to a small value'\n });\n }\n this.manifest.segments = uris;\n },\n key() {\n if (!entry.attributes) {\n this.trigger('warn', {\n message: 'ignoring key declaration without attribute list'\n });\n return;\n } // clear the active encryption key\n\n if (entry.attributes.METHOD === 'NONE') {\n key = null;\n return;\n }\n if (!entry.attributes.URI) {\n this.trigger('warn', {\n message: 'ignoring key declaration without URI'\n });\n return;\n }\n if (entry.attributes.KEYFORMAT === 'com.apple.streamingkeydelivery') {\n this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n this.manifest.contentProtection['com.apple.fps.1_0'] = {\n attributes: entry.attributes\n };\n return;\n }\n if (entry.attributes.KEYFORMAT === 'com.microsoft.playready') {\n this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n this.manifest.contentProtection['com.microsoft.playready'] = {\n uri: entry.attributes.URI\n };\n return;\n } // check if the content is encrypted for Widevine\n // Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf\n\n if (entry.attributes.KEYFORMAT === widevineUuid) {\n const VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];\n if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {\n this.trigger('warn', {\n message: 'invalid key method provided for Widevine'\n });\n return;\n }\n if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {\n this.trigger('warn', {\n message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'\n });\n }\n if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {\n this.trigger('warn', {\n message: 'invalid key URI provided for Widevine'\n });\n return;\n }\n if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {\n this.trigger('warn', {\n message: 'invalid key ID provided for Widevine'\n });\n return;\n } // if Widevine key attributes are valid, store them as `contentProtection`\n // on the manifest to emulate Widevine tag structure in a DASH mpd\n\n this.manifest.contentProtection = this.manifest.contentProtection || {};\n this.manifest.contentProtection['com.widevine.alpha'] = {\n attributes: {\n schemeIdUri: entry.attributes.KEYFORMAT,\n // remove '0x' from the key id string\n keyId: entry.attributes.KEYID.substring(2)\n },\n // decode the base64-encoded PSSH box\n pssh: decodeB64ToUint8Array$1(entry.attributes.URI.split(',')[1])\n };\n return;\n }\n if (!entry.attributes.METHOD) {\n this.trigger('warn', {\n message: 'defaulting key method to AES-128'\n });\n } // setup an encryption key for upcoming segments\n\n key = {\n method: entry.attributes.METHOD || 'AES-128',\n uri: entry.attributes.URI\n };\n if (typeof entry.attributes.IV !== 'undefined') {\n key.iv = entry.attributes.IV;\n }\n },\n 'media-sequence'() {\n if (!isFinite(entry.number)) {\n this.trigger('warn', {\n message: 'ignoring invalid media sequence: ' + entry.number\n });\n return;\n }\n this.manifest.mediaSequence = entry.number;\n },\n 'discontinuity-sequence'() {\n if (!isFinite(entry.number)) {\n this.trigger('warn', {\n message: 'ignoring invalid discontinuity sequence: ' + entry.number\n });\n return;\n }\n this.manifest.discontinuitySequence = entry.number;\n currentTimeline = entry.number;\n },\n 'playlist-type'() {\n if (!/VOD|EVENT/.test(entry.playlistType)) {\n this.trigger('warn', {\n message: 'ignoring unknown playlist type: ' + entry.playlist\n });\n return;\n }\n this.manifest.playlistType = entry.playlistType;\n },\n map() {\n currentMap = {};\n if (entry.uri) {\n currentMap.uri = entry.uri;\n }\n if (entry.byterange) {\n currentMap.byterange = entry.byterange;\n }\n if (key) {\n currentMap.key = key;\n }\n },\n 'stream-inf'() {\n this.manifest.playlists = uris;\n this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n if (!entry.attributes) {\n this.trigger('warn', {\n message: 'ignoring empty stream-inf attributes'\n });\n return;\n }\n if (!currentUri.attributes) {\n currentUri.attributes = {};\n }\n _extends$1(currentUri.attributes, entry.attributes);\n },\n media() {\n this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {\n this.trigger('warn', {\n message: 'ignoring incomplete or missing media group'\n });\n return;\n } // find the media group, creating defaults as necessary\n\n const mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];\n mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};\n mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata\n\n rendition = {\n default: /yes/i.test(entry.attributes.DEFAULT)\n };\n if (rendition.default) {\n rendition.autoselect = true;\n } else {\n rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);\n }\n if (entry.attributes.LANGUAGE) {\n rendition.language = entry.attributes.LANGUAGE;\n }\n if (entry.attributes.URI) {\n rendition.uri = entry.attributes.URI;\n }\n if (entry.attributes['INSTREAM-ID']) {\n rendition.instreamId = entry.attributes['INSTREAM-ID'];\n }\n if (entry.attributes.CHARACTERISTICS) {\n rendition.characteristics = entry.attributes.CHARACTERISTICS;\n }\n if (entry.attributes.FORCED) {\n rendition.forced = /yes/i.test(entry.attributes.FORCED);\n } // insert the new rendition\n\n mediaGroup[entry.attributes.NAME] = rendition;\n },\n discontinuity() {\n currentTimeline += 1;\n currentUri.discontinuity = true;\n this.manifest.discontinuityStarts.push(uris.length);\n },\n 'program-date-time'() {\n if (typeof this.manifest.dateTimeString === 'undefined') {\n // PROGRAM-DATE-TIME is a media-segment tag, but for backwards\n // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag\n // to the manifest object\n // TODO: Consider removing this in future major version\n this.manifest.dateTimeString = entry.dateTimeString;\n this.manifest.dateTimeObject = entry.dateTimeObject;\n }\n currentUri.dateTimeString = entry.dateTimeString;\n currentUri.dateTimeObject = entry.dateTimeObject;\n },\n targetduration() {\n if (!isFinite(entry.duration) || entry.duration < 0) {\n this.trigger('warn', {\n message: 'ignoring invalid target duration: ' + entry.duration\n });\n return;\n }\n this.manifest.targetDuration = entry.duration;\n setHoldBack.call(this, this.manifest);\n },\n start() {\n if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {\n this.trigger('warn', {\n message: 'ignoring start declaration without appropriate attribute list'\n });\n return;\n }\n this.manifest.start = {\n timeOffset: entry.attributes['TIME-OFFSET'],\n precise: entry.attributes.PRECISE\n };\n },\n 'cue-out'() {\n currentUri.cueOut = entry.data;\n },\n 'cue-out-cont'() {\n currentUri.cueOutCont = entry.data;\n },\n 'cue-in'() {\n currentUri.cueIn = entry.data;\n },\n 'skip'() {\n this.manifest.skip = camelCaseKeys(entry.attributes);\n this.warnOnMissingAttributes_('#EXT-X-SKIP', entry.attributes, ['SKIPPED-SEGMENTS']);\n },\n 'part'() {\n hasParts = true; // parts are always specifed before a segment\n\n const segmentIndex = this.manifest.segments.length;\n const part = camelCaseKeys(entry.attributes);\n currentUri.parts = currentUri.parts || [];\n currentUri.parts.push(part);\n if (part.byterange) {\n if (!part.byterange.hasOwnProperty('offset')) {\n part.byterange.offset = lastPartByterangeEnd;\n }\n lastPartByterangeEnd = part.byterange.offset + part.byterange.length;\n }\n const partIndex = currentUri.parts.length - 1;\n this.warnOnMissingAttributes_(`#EXT-X-PART #${partIndex} for segment #${segmentIndex}`, entry.attributes, ['URI', 'DURATION']);\n if (this.manifest.renditionReports) {\n this.manifest.renditionReports.forEach((r, i) => {\n if (!r.hasOwnProperty('lastPart')) {\n this.trigger('warn', {\n message: `#EXT-X-RENDITION-REPORT #${i} lacks required attribute(s): LAST-PART`\n });\n }\n });\n }\n },\n 'server-control'() {\n const attrs = this.manifest.serverControl = camelCaseKeys(entry.attributes);\n if (!attrs.hasOwnProperty('canBlockReload')) {\n attrs.canBlockReload = false;\n this.trigger('info', {\n message: '#EXT-X-SERVER-CONTROL defaulting CAN-BLOCK-RELOAD to false'\n });\n }\n setHoldBack.call(this, this.manifest);\n if (attrs.canSkipDateranges && !attrs.hasOwnProperty('canSkipUntil')) {\n this.trigger('warn', {\n message: '#EXT-X-SERVER-CONTROL lacks required attribute CAN-SKIP-UNTIL which is required when CAN-SKIP-DATERANGES is set'\n });\n }\n },\n 'preload-hint'() {\n // parts are always specifed before a segment\n const segmentIndex = this.manifest.segments.length;\n const hint = camelCaseKeys(entry.attributes);\n const isPart = hint.type && hint.type === 'PART';\n currentUri.preloadHints = currentUri.preloadHints || [];\n currentUri.preloadHints.push(hint);\n if (hint.byterange) {\n if (!hint.byterange.hasOwnProperty('offset')) {\n // use last part byterange end or zero if not a part.\n hint.byterange.offset = isPart ? lastPartByterangeEnd : 0;\n if (isPart) {\n lastPartByterangeEnd = hint.byterange.offset + hint.byterange.length;\n }\n }\n }\n const index = currentUri.preloadHints.length - 1;\n this.warnOnMissingAttributes_(`#EXT-X-PRELOAD-HINT #${index} for segment #${segmentIndex}`, entry.attributes, ['TYPE', 'URI']);\n if (!hint.type) {\n return;\n } // search through all preload hints except for the current one for\n // a duplicate type.\n\n for (let i = 0; i < currentUri.preloadHints.length - 1; i++) {\n const otherHint = currentUri.preloadHints[i];\n if (!otherHint.type) {\n continue;\n }\n if (otherHint.type === hint.type) {\n this.trigger('warn', {\n message: `#EXT-X-PRELOAD-HINT #${index} for segment #${segmentIndex} has the same TYPE ${hint.type} as preload hint #${i}`\n });\n }\n }\n },\n 'rendition-report'() {\n const report = camelCaseKeys(entry.attributes);\n this.manifest.renditionReports = this.manifest.renditionReports || [];\n this.manifest.renditionReports.push(report);\n const index = this.manifest.renditionReports.length - 1;\n const required = ['LAST-MSN', 'URI'];\n if (hasParts) {\n required.push('LAST-PART');\n }\n this.warnOnMissingAttributes_(`#EXT-X-RENDITION-REPORT #${index}`, entry.attributes, required);\n },\n 'part-inf'() {\n this.manifest.partInf = camelCaseKeys(entry.attributes);\n this.warnOnMissingAttributes_('#EXT-X-PART-INF', entry.attributes, ['PART-TARGET']);\n if (this.manifest.partInf.partTarget) {\n this.manifest.partTargetDuration = this.manifest.partInf.partTarget;\n }\n setHoldBack.call(this, this.manifest);\n }\n })[entry.tagType] || noop).call(self);\n },\n uri() {\n currentUri.uri = entry.uri;\n uris.push(currentUri); // if no explicit duration was declared, use the target duration\n\n if (this.manifest.targetDuration && !('duration' in currentUri)) {\n this.trigger('warn', {\n message: 'defaulting segment duration to the target duration'\n });\n currentUri.duration = this.manifest.targetDuration;\n } // annotate with encryption information, if necessary\n\n if (key) {\n currentUri.key = key;\n }\n currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary\n\n if (currentMap) {\n currentUri.map = currentMap;\n } // reset the last byterange end as it needs to be 0 between parts\n\n lastPartByterangeEnd = 0; // prepare for the next URI\n\n currentUri = {};\n },\n comment() {// comments are not important for playback\n },\n custom() {\n // if this is segment-level data attach the output to the segment\n if (entry.segment) {\n currentUri.custom = currentUri.custom || {};\n currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object\n } else {\n this.manifest.custom = this.manifest.custom || {};\n this.manifest.custom[entry.customType] = entry.data;\n }\n }\n })[entry.type].call(self);\n });\n }\n warnOnMissingAttributes_(identifier, attributes, required) {\n const missing = [];\n required.forEach(function (key) {\n if (!attributes.hasOwnProperty(key)) {\n missing.push(key);\n }\n });\n if (missing.length) {\n this.trigger('warn', {\n message: `${identifier} lacks required attribute(s): ${missing.join(', ')}`\n });\n }\n }\n /**\n * Parse the input string and update the manifest object.\n *\n * @param {string} chunk a potentially incomplete portion of the manifest\n */\n\n push(chunk) {\n this.lineStream.push(chunk);\n }\n /**\n * Flush any remaining input. This can be handy if the last line of an M3U8\n * manifest did not contain a trailing newline but the file has been\n * completely received.\n */\n\n end() {\n // flush any buffered input\n this.lineStream.push('\\n');\n this.trigger('end');\n }\n /**\n * Add an additional parser for non-standard tags\n *\n * @param {Object} options a map of options for the added parser\n * @param {RegExp} options.expression a regular expression to match the custom header\n * @param {string} options.type the type to register to the output\n * @param {Function} [options.dataParser] function to parse the line into an object\n * @param {boolean} [options.segment] should tag data be attached to the segment object\n */\n\n addParser(options) {\n this.parseStream.addParser(options);\n }\n /**\n * Add a custom header mapper\n *\n * @param {Object} options\n * @param {RegExp} options.expression a regular expression to match the custom header\n * @param {Function} options.map function to translate tag into a different tag\n */\n\n addTagMapper(options) {\n this.parseStream.addTagMapper(options);\n }\n }\n\n var regexs = {\n // to determine mime types\n mp4: /^(av0?1|avc0?[1234]|vp0?9|flac|opus|mp3|mp4a|mp4v|stpp.ttml.im1t)/,\n webm: /^(vp0?[89]|av0?1|opus|vorbis)/,\n ogg: /^(vp0?[89]|theora|flac|opus|vorbis)/,\n // to determine if a codec is audio or video\n video: /^(av0?1|avc0?[1234]|vp0?[89]|hvc1|hev1|theora|mp4v)/,\n audio: /^(mp4a|flac|vorbis|opus|ac-[34]|ec-3|alac|mp3|speex|aac)/,\n text: /^(stpp.ttml.im1t)/,\n // mux.js support regex\n muxerVideo: /^(avc0?1)/,\n muxerAudio: /^(mp4a)/,\n // match nothing as muxer does not support text right now.\n // there cannot never be a character before the start of a string\n // so this matches nothing.\n muxerText: /a^/\n };\n var mediaTypes = ['video', 'audio', 'text'];\n var upperMediaTypes = ['Video', 'Audio', 'Text'];\n /**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string} codec\n * Codec string to translate\n * @return {string}\n * The translated codec string\n */\n\n var translateLegacyCodec = function translateLegacyCodec(codec) {\n if (!codec) {\n return codec;\n }\n return codec.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (orig, profile, avcLevel) {\n var profileHex = ('00' + Number(profile).toString(16)).slice(-2);\n var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);\n return 'avc1.' + profileHex + '00' + avcLevelHex;\n });\n };\n /**\n * @typedef {Object} ParsedCodecInfo\n * @property {number} codecCount\n * Number of codecs parsed\n * @property {string} [videoCodec]\n * Parsed video codec (if found)\n * @property {string} [videoObjectTypeIndicator]\n * Video object type indicator (if found)\n * @property {string|null} audioProfile\n * Audio profile\n */\n\n /**\n * Parses a codec string to retrieve the number of codecs specified, the video codec and\n * object type indicator, and the audio profile.\n *\n * @param {string} [codecString]\n * The codec string to parse\n * @return {ParsedCodecInfo}\n * Parsed codec info\n */\n\n var parseCodecs = function parseCodecs(codecString) {\n if (codecString === void 0) {\n codecString = '';\n }\n var codecs = codecString.split(',');\n var result = [];\n codecs.forEach(function (codec) {\n codec = codec.trim();\n var codecType;\n mediaTypes.forEach(function (name) {\n var match = regexs[name].exec(codec.toLowerCase());\n if (!match || match.length <= 1) {\n return;\n }\n codecType = name; // maintain codec case\n\n var type = codec.substring(0, match[1].length);\n var details = codec.replace(type, '');\n result.push({\n type: type,\n details: details,\n mediaType: name\n });\n });\n if (!codecType) {\n result.push({\n type: codec,\n details: '',\n mediaType: 'unknown'\n });\n }\n });\n return result;\n };\n /**\n * Returns a ParsedCodecInfo object for the default alternate audio playlist if there is\n * a default alternate audio playlist for the provided audio group.\n *\n * @param {Object} master\n * The master playlist\n * @param {string} audioGroupId\n * ID of the audio group for which to find the default codec info\n * @return {ParsedCodecInfo}\n * Parsed codec info\n */\n\n var codecsFromDefault = function codecsFromDefault(master, audioGroupId) {\n if (!master.mediaGroups.AUDIO || !audioGroupId) {\n return null;\n }\n var audioGroup = master.mediaGroups.AUDIO[audioGroupId];\n if (!audioGroup) {\n return null;\n }\n for (var name in audioGroup) {\n var audioType = audioGroup[name];\n if (audioType.default && audioType.playlists) {\n // codec should be the same for all playlists within the audio type\n return parseCodecs(audioType.playlists[0].attributes.CODECS);\n }\n }\n return null;\n };\n var isAudioCodec = function isAudioCodec(codec) {\n if (codec === void 0) {\n codec = '';\n }\n return regexs.audio.test(codec.trim().toLowerCase());\n };\n var isTextCodec = function isTextCodec(codec) {\n if (codec === void 0) {\n codec = '';\n }\n return regexs.text.test(codec.trim().toLowerCase());\n };\n var getMimeForCodec = function getMimeForCodec(codecString) {\n if (!codecString || typeof codecString !== 'string') {\n return;\n }\n var codecs = codecString.toLowerCase().split(',').map(function (c) {\n return translateLegacyCodec(c.trim());\n }); // default to video type\n\n var type = 'video'; // only change to audio type if the only codec we have is\n // audio\n\n if (codecs.length === 1 && isAudioCodec(codecs[0])) {\n type = 'audio';\n } else if (codecs.length === 1 && isTextCodec(codecs[0])) {\n // text uses application/<container> for now\n type = 'application';\n } // default the container to mp4\n\n var container = 'mp4'; // every codec must be able to go into the container\n // for that container to be the correct one\n\n if (codecs.every(function (c) {\n return regexs.mp4.test(c);\n })) {\n container = 'mp4';\n } else if (codecs.every(function (c) {\n return regexs.webm.test(c);\n })) {\n container = 'webm';\n } else if (codecs.every(function (c) {\n return regexs.ogg.test(c);\n })) {\n container = 'ogg';\n }\n return type + \"/\" + container + \";codecs=\\\"\" + codecString + \"\\\"\";\n };\n var browserSupportsCodec = function browserSupportsCodec(codecString) {\n if (codecString === void 0) {\n codecString = '';\n }\n return window.MediaSource && window.MediaSource.isTypeSupported && window.MediaSource.isTypeSupported(getMimeForCodec(codecString)) || false;\n };\n var muxerSupportsCodec = function muxerSupportsCodec(codecString) {\n if (codecString === void 0) {\n codecString = '';\n }\n return codecString.toLowerCase().split(',').every(function (codec) {\n codec = codec.trim(); // any match is supported.\n\n for (var i = 0; i < upperMediaTypes.length; i++) {\n var type = upperMediaTypes[i];\n if (regexs[\"muxer\" + type].test(codec)) {\n return true;\n }\n }\n return false;\n });\n };\n var DEFAULT_AUDIO_CODEC = 'mp4a.40.2';\n var DEFAULT_VIDEO_CODEC = 'avc1.4d400d';\n\n var MPEGURL_REGEX = /^(audio|video|application)\\/(x-|vnd\\.apple\\.)?mpegurl/i;\n var DASH_REGEX = /^application\\/dash\\+xml/i;\n /**\n * Returns a string that describes the type of source based on a video source object's\n * media type.\n *\n * @see {@link https://dev.w3.org/html5/pf-summary/video.html#dom-source-type|Source Type}\n *\n * @param {string} type\n * Video source object media type\n * @return {('hls'|'dash'|'vhs-json'|null)}\n * VHS source type string\n */\n\n var simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {\n if (MPEGURL_REGEX.test(type)) {\n return 'hls';\n }\n if (DASH_REGEX.test(type)) {\n return 'dash';\n } // Denotes the special case of a manifest object passed to http-streaming instead of a\n // source URL.\n //\n // See https://en.wikipedia.org/wiki/Media_type for details on specifying media types.\n //\n // In this case, vnd stands for vendor, video.js for the organization, VHS for this\n // project, and the +json suffix identifies the structure of the media type.\n\n if (type === 'application/vnd.videojs.vhs+json') {\n return 'vhs-json';\n }\n return null;\n };\n\n // const log2 = Math.log2 ? Math.log2 : (x) => (Math.log(x) / Math.log(2));\n // we used to do this with log2 but BigInt does not support builtin math\n // Math.ceil(log2(x));\n\n var countBits = function countBits(x) {\n return x.toString(2).length;\n }; // count the number of whole bytes it would take to represent a number\n\n var countBytes = function countBytes(x) {\n return Math.ceil(countBits(x) / 8);\n };\n var isArrayBufferView = function isArrayBufferView(obj) {\n if (ArrayBuffer.isView === 'function') {\n return ArrayBuffer.isView(obj);\n }\n return obj && obj.buffer instanceof ArrayBuffer;\n };\n var isTypedArray = function isTypedArray(obj) {\n return isArrayBufferView(obj);\n };\n var toUint8 = function toUint8(bytes) {\n if (bytes instanceof Uint8Array) {\n return bytes;\n }\n if (!Array.isArray(bytes) && !isTypedArray(bytes) && !(bytes instanceof ArrayBuffer)) {\n // any non-number or NaN leads to empty uint8array\n // eslint-disable-next-line\n if (typeof bytes !== 'number' || typeof bytes === 'number' && bytes !== bytes) {\n bytes = 0;\n } else {\n bytes = [bytes];\n }\n }\n return new Uint8Array(bytes && bytes.buffer || bytes, bytes && bytes.byteOffset || 0, bytes && bytes.byteLength || 0);\n };\n var BigInt = window.BigInt || Number;\n var BYTE_TABLE = [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\n (function () {\n var a = new Uint16Array([0xFFCC]);\n var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);\n if (b[0] === 0xFF) {\n return 'big';\n }\n if (b[0] === 0xCC) {\n return 'little';\n }\n return 'unknown';\n })();\n var bytesToNumber = function bytesToNumber(bytes, _temp) {\n var _ref = _temp === void 0 ? {} : _temp,\n _ref$signed = _ref.signed,\n signed = _ref$signed === void 0 ? false : _ref$signed,\n _ref$le = _ref.le,\n le = _ref$le === void 0 ? false : _ref$le;\n bytes = toUint8(bytes);\n var fn = le ? 'reduce' : 'reduceRight';\n var obj = bytes[fn] ? bytes[fn] : Array.prototype[fn];\n var number = obj.call(bytes, function (total, byte, i) {\n var exponent = le ? i : Math.abs(i + 1 - bytes.length);\n return total + BigInt(byte) * BYTE_TABLE[exponent];\n }, BigInt(0));\n if (signed) {\n var max = BYTE_TABLE[bytes.length] / BigInt(2) - BigInt(1);\n number = BigInt(number);\n if (number > max) {\n number -= max;\n number -= max;\n number -= BigInt(2);\n }\n }\n return Number(number);\n };\n var numberToBytes = function numberToBytes(number, _temp2) {\n var _ref2 = _temp2 === void 0 ? {} : _temp2,\n _ref2$le = _ref2.le,\n le = _ref2$le === void 0 ? false : _ref2$le;\n\n // eslint-disable-next-line\n if (typeof number !== 'bigint' && typeof number !== 'number' || typeof number === 'number' && number !== number) {\n number = 0;\n }\n number = BigInt(number);\n var byteCount = countBytes(number);\n var bytes = new Uint8Array(new ArrayBuffer(byteCount));\n for (var i = 0; i < byteCount; i++) {\n var byteIndex = le ? i : Math.abs(i + 1 - bytes.length);\n bytes[byteIndex] = Number(number / BYTE_TABLE[i] & BigInt(0xFF));\n if (number < 0) {\n bytes[byteIndex] = Math.abs(~bytes[byteIndex]);\n bytes[byteIndex] -= i === 0 ? 1 : 2;\n }\n }\n return bytes;\n };\n var stringToBytes = function stringToBytes(string, stringIsBytes) {\n if (typeof string !== 'string' && string && typeof string.toString === 'function') {\n string = string.toString();\n }\n if (typeof string !== 'string') {\n return new Uint8Array();\n } // If the string already is bytes, we don't have to do this\n // otherwise we do this so that we split multi length characters\n // into individual bytes\n\n if (!stringIsBytes) {\n string = unescape(encodeURIComponent(string));\n }\n var view = new Uint8Array(string.length);\n for (var i = 0; i < string.length; i++) {\n view[i] = string.charCodeAt(i);\n }\n return view;\n };\n var concatTypedArrays = function concatTypedArrays() {\n for (var _len = arguments.length, buffers = new Array(_len), _key = 0; _key < _len; _key++) {\n buffers[_key] = arguments[_key];\n }\n buffers = buffers.filter(function (b) {\n return b && (b.byteLength || b.length) && typeof b !== 'string';\n });\n if (buffers.length <= 1) {\n // for 0 length we will return empty uint8\n // for 1 length we return the first uint8\n return toUint8(buffers[0]);\n }\n var totalLen = buffers.reduce(function (total, buf, i) {\n return total + (buf.byteLength || buf.length);\n }, 0);\n var tempBuffer = new Uint8Array(totalLen);\n var offset = 0;\n buffers.forEach(function (buf) {\n buf = toUint8(buf);\n tempBuffer.set(buf, offset);\n offset += buf.byteLength;\n });\n return tempBuffer;\n };\n /**\n * Check if the bytes \"b\" are contained within bytes \"a\".\n *\n * @param {Uint8Array|Array} a\n * Bytes to check in\n *\n * @param {Uint8Array|Array} b\n * Bytes to check for\n *\n * @param {Object} options\n * options\n *\n * @param {Array|Uint8Array} [offset=0]\n * offset to use when looking at bytes in a\n *\n * @param {Array|Uint8Array} [mask=[]]\n * mask to use on bytes before comparison.\n *\n * @return {boolean}\n * If all bytes in b are inside of a, taking into account\n * bit masks.\n */\n\n var bytesMatch = function bytesMatch(a, b, _temp3) {\n var _ref3 = _temp3 === void 0 ? {} : _temp3,\n _ref3$offset = _ref3.offset,\n offset = _ref3$offset === void 0 ? 0 : _ref3$offset,\n _ref3$mask = _ref3.mask,\n mask = _ref3$mask === void 0 ? [] : _ref3$mask;\n a = toUint8(a);\n b = toUint8(b); // ie 11 does not support uint8 every\n\n var fn = b.every ? b.every : Array.prototype.every;\n return b.length && a.length - offset >= b.length &&\n // ie 11 doesn't support every on uin8\n fn.call(b, function (bByte, i) {\n var aByte = mask[i] ? mask[i] & a[offset + i] : a[offset + i];\n return bByte === aByte;\n });\n };\n\n var DEFAULT_LOCATION = 'http://example.com';\n var resolveUrl$1 = function resolveUrl(baseUrl, relativeUrl) {\n // return early if we don't need to resolve\n if (/^[a-z]+:/i.test(relativeUrl)) {\n return relativeUrl;\n } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location\n\n if (/^data:/.test(baseUrl)) {\n baseUrl = window.location && window.location.href || '';\n } // IE11 supports URL but not the URL constructor\n // feature detect the behavior we want\n\n var nativeURL = typeof window.URL === 'function';\n var protocolLess = /^\\/\\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node)\n // and if baseUrl isn't an absolute url\n\n var removeLocation = !window.location && !/\\/\\//i.test(baseUrl); // if the base URL is relative then combine with the current location\n\n if (nativeURL) {\n baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION);\n } else if (!/\\/\\//i.test(baseUrl)) {\n baseUrl = urlToolkit.buildAbsoluteURL(window.location && window.location.href || '', baseUrl);\n }\n if (nativeURL) {\n var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol\n // and if we're location-less, remove the location\n // otherwise, return the url unmodified\n\n if (removeLocation) {\n return newUrl.href.slice(DEFAULT_LOCATION.length);\n } else if (protocolLess) {\n return newUrl.href.slice(newUrl.protocol.length);\n }\n return newUrl.href;\n }\n return urlToolkit.buildAbsoluteURL(baseUrl, relativeUrl);\n };\n\n /**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n * The parsed master manifest object\n * @param {string[]} groups\n * The media groups to call the callback for\n * @param {Function} callback\n * Callback to call for each media group\n */\n var forEachMediaGroup$1 = function forEachMediaGroup(master, groups, callback) {\n groups.forEach(function (mediaType) {\n for (var groupKey in master.mediaGroups[mediaType]) {\n for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n callback(mediaProperties, mediaType, groupKey, labelKey);\n }\n }\n });\n };\n\n var atob = function atob(s) {\n return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');\n };\n function decodeB64ToUint8Array(b64Text) {\n var decodedString = atob(b64Text);\n var array = new Uint8Array(decodedString.length);\n for (var i = 0; i < decodedString.length; i++) {\n array[i] = decodedString.charCodeAt(i);\n }\n return array;\n }\n\n /**\n * Ponyfill for `Array.prototype.find` which is only available in ES6 runtimes.\n *\n * Works with anything that has a `length` property and index access properties, including NodeList.\n *\n * @template {unknown} T\n * @param {Array<T> | ({length:number, [number]: T})} list\n * @param {function (item: T, index: number, list:Array<T> | ({length:number, [number]: T})):boolean} predicate\n * @param {Partial<Pick<ArrayConstructor['prototype'], 'find'>>?} ac `Array.prototype` by default,\n * \t\t\t\tallows injecting a custom implementation in tests\n * @returns {T | undefined}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find\n * @see https://tc39.es/ecma262/multipage/indexed-collections.html#sec-array.prototype.find\n */\n function find$1(list, predicate, ac) {\n if (ac === undefined) {\n ac = Array.prototype;\n }\n if (list && typeof ac.find === 'function') {\n return ac.find.call(list, predicate);\n }\n for (var i = 0; i < list.length; i++) {\n if (Object.prototype.hasOwnProperty.call(list, i)) {\n var item = list[i];\n if (predicate.call(undefined, item, i, list)) {\n return item;\n }\n }\n }\n }\n\n /**\n * \"Shallow freezes\" an object to render it immutable.\n * Uses `Object.freeze` if available,\n * otherwise the immutability is only in the type.\n *\n * Is used to create \"enum like\" objects.\n *\n * @template T\n * @param {T} object the object to freeze\n * @param {Pick<ObjectConstructor, 'freeze'> = Object} oc `Object` by default,\n * \t\t\t\tallows to inject custom object constructor for tests\n * @returns {Readonly<T>}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze\n */\n function freeze(object, oc) {\n if (oc === undefined) {\n oc = Object;\n }\n return oc && typeof oc.freeze === 'function' ? oc.freeze(object) : object;\n }\n\n /**\n * Since we can not rely on `Object.assign` we provide a simplified version\n * that is sufficient for our needs.\n *\n * @param {Object} target\n * @param {Object | null | undefined} source\n *\n * @returns {Object} target\n * @throws TypeError if target is not an object\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign\n * @see https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.assign\n */\n function assign(target, source) {\n if (target === null || typeof target !== 'object') {\n throw new TypeError('target is not an object');\n }\n for (var key in source) {\n if (Object.prototype.hasOwnProperty.call(source, key)) {\n target[key] = source[key];\n }\n }\n return target;\n }\n\n /**\n * All mime types that are allowed as input to `DOMParser.parseFromString`\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString#Argument02 MDN\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#domparsersupportedtype WHATWG HTML Spec\n * @see DOMParser.prototype.parseFromString\n */\n var MIME_TYPE = freeze({\n /**\n * `text/html`, the only mime type that triggers treating an XML document as HTML.\n *\n * @see DOMParser.SupportedType.isHTML\n * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring WHATWG HTML Spec\n */\n HTML: 'text/html',\n /**\n * Helper method to check a mime type if it indicates an HTML document\n *\n * @param {string} [value]\n * @returns {boolean}\n *\n * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring \t */\n isHTML: function (value) {\n return value === MIME_TYPE.HTML;\n },\n /**\n * `application/xml`, the standard mime type for XML documents.\n *\n * @see https://www.iana.org/assignments/media-types/application/xml IANA MimeType registration\n * @see https://tools.ietf.org/html/rfc7303#section-9.1 RFC 7303\n * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n */\n XML_APPLICATION: 'application/xml',\n /**\n * `text/html`, an alias for `application/xml`.\n *\n * @see https://tools.ietf.org/html/rfc7303#section-9.2 RFC 7303\n * @see https://www.iana.org/assignments/media-types/text/xml IANA MimeType registration\n * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n */\n XML_TEXT: 'text/xml',\n /**\n * `application/xhtml+xml`, indicates an XML document that has the default HTML namespace,\n * but is parsed as an XML document.\n *\n * @see https://www.iana.org/assignments/media-types/application/xhtml+xml IANA MimeType registration\n * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument WHATWG DOM Spec\n * @see https://en.wikipedia.org/wiki/XHTML Wikipedia\n */\n XML_XHTML_APPLICATION: 'application/xhtml+xml',\n /**\n * `image/svg+xml`,\n *\n * @see https://www.iana.org/assignments/media-types/image/svg+xml IANA MimeType registration\n * @see https://www.w3.org/TR/SVG11/ W3C SVG 1.1\n * @see https://en.wikipedia.org/wiki/Scalable_Vector_Graphics Wikipedia\n */\n XML_SVG_IMAGE: 'image/svg+xml'\n });\n\n /**\n * Namespaces that are used in this code base.\n *\n * @see http://www.w3.org/TR/REC-xml-names\n */\n var NAMESPACE$3 = freeze({\n /**\n * The XHTML namespace.\n *\n * @see http://www.w3.org/1999/xhtml\n */\n HTML: 'http://www.w3.org/1999/xhtml',\n /**\n * Checks if `uri` equals `NAMESPACE.HTML`.\n *\n * @param {string} [uri]\n *\n * @see NAMESPACE.HTML\n */\n isHTML: function (uri) {\n return uri === NAMESPACE$3.HTML;\n },\n /**\n * The SVG namespace.\n *\n * @see http://www.w3.org/2000/svg\n */\n SVG: 'http://www.w3.org/2000/svg',\n /**\n * The `xml:` namespace.\n *\n * @see http://www.w3.org/XML/1998/namespace\n */\n XML: 'http://www.w3.org/XML/1998/namespace',\n /**\n * The `xmlns:` namespace\n *\n * @see https://www.w3.org/2000/xmlns/\n */\n XMLNS: 'http://www.w3.org/2000/xmlns/'\n });\n var assign_1 = assign;\n var find_1 = find$1;\n var freeze_1 = freeze;\n var MIME_TYPE_1 = MIME_TYPE;\n var NAMESPACE_1 = NAMESPACE$3;\n var conventions = {\n assign: assign_1,\n find: find_1,\n freeze: freeze_1,\n MIME_TYPE: MIME_TYPE_1,\n NAMESPACE: NAMESPACE_1\n };\n\n var find = conventions.find;\n var NAMESPACE$2 = conventions.NAMESPACE;\n\n /**\n * A prerequisite for `[].filter`, to drop elements that are empty\n * @param {string} input\n * @returns {boolean}\n */\n function notEmptyString(input) {\n return input !== '';\n }\n /**\n * @see https://infra.spec.whatwg.org/#split-on-ascii-whitespace\n * @see https://infra.spec.whatwg.org/#ascii-whitespace\n *\n * @param {string} input\n * @returns {string[]} (can be empty)\n */\n function splitOnASCIIWhitespace(input) {\n // U+0009 TAB, U+000A LF, U+000C FF, U+000D CR, U+0020 SPACE\n return input ? input.split(/[\\t\\n\\f\\r ]+/).filter(notEmptyString) : [];\n }\n\n /**\n * Adds element as a key to current if it is not already present.\n *\n * @param {Record<string, boolean | undefined>} current\n * @param {string} element\n * @returns {Record<string, boolean | undefined>}\n */\n function orderedSetReducer(current, element) {\n if (!current.hasOwnProperty(element)) {\n current[element] = true;\n }\n return current;\n }\n\n /**\n * @see https://infra.spec.whatwg.org/#ordered-set\n * @param {string} input\n * @returns {string[]}\n */\n function toOrderedSet(input) {\n if (!input) return [];\n var list = splitOnASCIIWhitespace(input);\n return Object.keys(list.reduce(orderedSetReducer, {}));\n }\n\n /**\n * Uses `list.indexOf` to implement something like `Array.prototype.includes`,\n * which we can not rely on being available.\n *\n * @param {any[]} list\n * @returns {function(any): boolean}\n */\n function arrayIncludes(list) {\n return function (element) {\n return list && list.indexOf(element) !== -1;\n };\n }\n function copy(src, dest) {\n for (var p in src) {\n if (Object.prototype.hasOwnProperty.call(src, p)) {\n dest[p] = src[p];\n }\n }\n }\n\n /**\n ^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*((?:.*\\{\\s*?[\\r\\n][\\s\\S]*?^})|\\S.*?(?=[;\\r\\n]));?\n ^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*(\\S.*?(?=[;\\r\\n]));?\n */\n function _extends(Class, Super) {\n var pt = Class.prototype;\n if (!(pt instanceof Super)) {\n function t() {}\n t.prototype = Super.prototype;\n t = new t();\n copy(pt, t);\n Class.prototype = pt = t;\n }\n if (pt.constructor != Class) {\n if (typeof Class != 'function') {\n console.error(\"unknown Class:\" + Class);\n }\n pt.constructor = Class;\n }\n }\n\n // Node Types\n var NodeType = {};\n var ELEMENT_NODE = NodeType.ELEMENT_NODE = 1;\n var ATTRIBUTE_NODE = NodeType.ATTRIBUTE_NODE = 2;\n var TEXT_NODE = NodeType.TEXT_NODE = 3;\n var CDATA_SECTION_NODE = NodeType.CDATA_SECTION_NODE = 4;\n var ENTITY_REFERENCE_NODE = NodeType.ENTITY_REFERENCE_NODE = 5;\n var ENTITY_NODE = NodeType.ENTITY_NODE = 6;\n var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;\n var COMMENT_NODE = NodeType.COMMENT_NODE = 8;\n var DOCUMENT_NODE = NodeType.DOCUMENT_NODE = 9;\n var DOCUMENT_TYPE_NODE = NodeType.DOCUMENT_TYPE_NODE = 10;\n var DOCUMENT_FRAGMENT_NODE = NodeType.DOCUMENT_FRAGMENT_NODE = 11;\n var NOTATION_NODE = NodeType.NOTATION_NODE = 12;\n\n // ExceptionCode\n var ExceptionCode = {};\n var ExceptionMessage = {};\n ExceptionCode.INDEX_SIZE_ERR = (ExceptionMessage[1] = \"Index size error\", 1);\n ExceptionCode.DOMSTRING_SIZE_ERR = (ExceptionMessage[2] = \"DOMString size error\", 2);\n var HIERARCHY_REQUEST_ERR = ExceptionCode.HIERARCHY_REQUEST_ERR = (ExceptionMessage[3] = \"Hierarchy request error\", 3);\n ExceptionCode.WRONG_DOCUMENT_ERR = (ExceptionMessage[4] = \"Wrong document\", 4);\n ExceptionCode.INVALID_CHARACTER_ERR = (ExceptionMessage[5] = \"Invalid character\", 5);\n ExceptionCode.NO_DATA_ALLOWED_ERR = (ExceptionMessage[6] = \"No data allowed\", 6);\n ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = (ExceptionMessage[7] = \"No modification allowed\", 7);\n var NOT_FOUND_ERR = ExceptionCode.NOT_FOUND_ERR = (ExceptionMessage[8] = \"Not found\", 8);\n ExceptionCode.NOT_SUPPORTED_ERR = (ExceptionMessage[9] = \"Not supported\", 9);\n var INUSE_ATTRIBUTE_ERR = ExceptionCode.INUSE_ATTRIBUTE_ERR = (ExceptionMessage[10] = \"Attribute in use\", 10);\n //level2\n ExceptionCode.INVALID_STATE_ERR = (ExceptionMessage[11] = \"Invalid state\", 11);\n ExceptionCode.SYNTAX_ERR = (ExceptionMessage[12] = \"Syntax error\", 12);\n ExceptionCode.INVALID_MODIFICATION_ERR = (ExceptionMessage[13] = \"Invalid modification\", 13);\n ExceptionCode.NAMESPACE_ERR = (ExceptionMessage[14] = \"Invalid namespace\", 14);\n ExceptionCode.INVALID_ACCESS_ERR = (ExceptionMessage[15] = \"Invalid access\", 15);\n\n /**\n * DOM Level 2\n * Object DOMException\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html\n * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html\n */\n function DOMException(code, message) {\n if (message instanceof Error) {\n var error = message;\n } else {\n error = this;\n Error.call(this, ExceptionMessage[code]);\n this.message = ExceptionMessage[code];\n if (Error.captureStackTrace) Error.captureStackTrace(this, DOMException);\n }\n error.code = code;\n if (message) this.message = this.message + \": \" + message;\n return error;\n }\n DOMException.prototype = Error.prototype;\n copy(ExceptionCode, DOMException);\n\n /**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177\n * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.\n * The items in the NodeList are accessible via an integral index, starting from 0.\n */\n function NodeList() {}\n NodeList.prototype = {\n /**\n * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.\n * @standard level1\n */\n length: 0,\n /**\n * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.\n * @standard level1\n * @param index unsigned long\n * Index into the collection.\n * @return Node\n * \tThe node at the indexth position in the NodeList, or null if that is not a valid index.\n */\n item: function (index) {\n return this[index] || null;\n },\n toString: function (isHTML, nodeFilter) {\n for (var buf = [], i = 0; i < this.length; i++) {\n serializeToString(this[i], buf, isHTML, nodeFilter);\n }\n return buf.join('');\n },\n /**\n * @private\n * @param {function (Node):boolean} predicate\n * @returns {Node[]}\n */\n filter: function (predicate) {\n return Array.prototype.filter.call(this, predicate);\n },\n /**\n * @private\n * @param {Node} item\n * @returns {number}\n */\n indexOf: function (item) {\n return Array.prototype.indexOf.call(this, item);\n }\n };\n function LiveNodeList(node, refresh) {\n this._node = node;\n this._refresh = refresh;\n _updateLiveList(this);\n }\n function _updateLiveList(list) {\n var inc = list._node._inc || list._node.ownerDocument._inc;\n if (list._inc != inc) {\n var ls = list._refresh(list._node);\n //console.log(ls.length)\n __set__(list, 'length', ls.length);\n copy(ls, list);\n list._inc = inc;\n }\n }\n LiveNodeList.prototype.item = function (i) {\n _updateLiveList(this);\n return this[i];\n };\n _extends(LiveNodeList, NodeList);\n\n /**\n * Objects implementing the NamedNodeMap interface are used\n * to represent collections of nodes that can be accessed by name.\n * Note that NamedNodeMap does not inherit from NodeList;\n * NamedNodeMaps are not maintained in any particular order.\n * Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index,\n * but this is simply to allow convenient enumeration of the contents of a NamedNodeMap,\n * and does not imply that the DOM specifies an order to these Nodes.\n * NamedNodeMap objects in the DOM are live.\n * used for attributes or DocumentType entities\n */\n function NamedNodeMap() {}\n function _findNodeIndex(list, node) {\n var i = list.length;\n while (i--) {\n if (list[i] === node) {\n return i;\n }\n }\n }\n function _addNamedNode(el, list, newAttr, oldAttr) {\n if (oldAttr) {\n list[_findNodeIndex(list, oldAttr)] = newAttr;\n } else {\n list[list.length++] = newAttr;\n }\n if (el) {\n newAttr.ownerElement = el;\n var doc = el.ownerDocument;\n if (doc) {\n oldAttr && _onRemoveAttribute(doc, el, oldAttr);\n _onAddAttribute(doc, el, newAttr);\n }\n }\n }\n function _removeNamedNode(el, list, attr) {\n //console.log('remove attr:'+attr)\n var i = _findNodeIndex(list, attr);\n if (i >= 0) {\n var lastIndex = list.length - 1;\n while (i < lastIndex) {\n list[i] = list[++i];\n }\n list.length = lastIndex;\n if (el) {\n var doc = el.ownerDocument;\n if (doc) {\n _onRemoveAttribute(doc, el, attr);\n attr.ownerElement = null;\n }\n }\n } else {\n throw new DOMException(NOT_FOUND_ERR, new Error(el.tagName + '@' + attr));\n }\n }\n NamedNodeMap.prototype = {\n length: 0,\n item: NodeList.prototype.item,\n getNamedItem: function (key) {\n //\t\tif(key.indexOf(':')>0 || key == 'xmlns'){\n //\t\t\treturn null;\n //\t\t}\n //console.log()\n var i = this.length;\n while (i--) {\n var attr = this[i];\n //console.log(attr.nodeName,key)\n if (attr.nodeName == key) {\n return attr;\n }\n }\n },\n setNamedItem: function (attr) {\n var el = attr.ownerElement;\n if (el && el != this._ownerElement) {\n throw new DOMException(INUSE_ATTRIBUTE_ERR);\n }\n var oldAttr = this.getNamedItem(attr.nodeName);\n _addNamedNode(this._ownerElement, this, attr, oldAttr);\n return oldAttr;\n },\n /* returns Node */\n setNamedItemNS: function (attr) {\n // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR\n var el = attr.ownerElement,\n oldAttr;\n if (el && el != this._ownerElement) {\n throw new DOMException(INUSE_ATTRIBUTE_ERR);\n }\n oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);\n _addNamedNode(this._ownerElement, this, attr, oldAttr);\n return oldAttr;\n },\n /* returns Node */\n removeNamedItem: function (key) {\n var attr = this.getNamedItem(key);\n _removeNamedNode(this._ownerElement, this, attr);\n return attr;\n },\n // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR\n\n //for level2\n removeNamedItemNS: function (namespaceURI, localName) {\n var attr = this.getNamedItemNS(namespaceURI, localName);\n _removeNamedNode(this._ownerElement, this, attr);\n return attr;\n },\n getNamedItemNS: function (namespaceURI, localName) {\n var i = this.length;\n while (i--) {\n var node = this[i];\n if (node.localName == localName && node.namespaceURI == namespaceURI) {\n return node;\n }\n }\n return null;\n }\n };\n\n /**\n * The DOMImplementation interface represents an object providing methods\n * which are not dependent on any particular document.\n * Such an object is returned by the `Document.implementation` property.\n *\n * __The individual methods describe the differences compared to the specs.__\n *\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation MDN\n * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490 DOM Level 1 Core (Initial)\n * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-102161490 DOM Level 2 Core\n * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-102161490 DOM Level 3 Core\n * @see https://dom.spec.whatwg.org/#domimplementation DOM Living Standard\n */\n function DOMImplementation$1() {}\n DOMImplementation$1.prototype = {\n /**\n * The DOMImplementation.hasFeature() method returns a Boolean flag indicating if a given feature is supported.\n * The different implementations fairly diverged in what kind of features were reported.\n * The latest version of the spec settled to force this method to always return true, where the functionality was accurate and in use.\n *\n * @deprecated It is deprecated and modern browsers return true in all cases.\n *\n * @param {string} feature\n * @param {string} [version]\n * @returns {boolean} always true\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/hasFeature MDN\n * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-5CED94D7 DOM Level 1 Core\n * @see https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature DOM Living Standard\n */\n hasFeature: function (feature, version) {\n return true;\n },\n /**\n * Creates an XML Document object of the specified type with its document element.\n *\n * __It behaves slightly different from the description in the living standard__:\n * - There is no interface/class `XMLDocument`, it returns a `Document` instance.\n * - `contentType`, `encoding`, `mode`, `origin`, `url` fields are currently not declared.\n * - this implementation is not validating names or qualified names\n * (when parsing XML strings, the SAX parser takes care of that)\n *\n * @param {string|null} namespaceURI\n * @param {string} qualifiedName\n * @param {DocumentType=null} doctype\n * @returns {Document}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocument MDN\n * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocument DOM Level 2 Core (initial)\n * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument DOM Level 2 Core\n *\n * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n */\n createDocument: function (namespaceURI, qualifiedName, doctype) {\n var doc = new Document();\n doc.implementation = this;\n doc.childNodes = new NodeList();\n doc.doctype = doctype || null;\n if (doctype) {\n doc.appendChild(doctype);\n }\n if (qualifiedName) {\n var root = doc.createElementNS(namespaceURI, qualifiedName);\n doc.appendChild(root);\n }\n return doc;\n },\n /**\n * Returns a doctype, with the given `qualifiedName`, `publicId`, and `systemId`.\n *\n * __This behavior is slightly different from the in the specs__:\n * - this implementation is not validating names or qualified names\n * (when parsing XML strings, the SAX parser takes care of that)\n *\n * @param {string} qualifiedName\n * @param {string} [publicId]\n * @param {string} [systemId]\n * @returns {DocumentType} which can either be used with `DOMImplementation.createDocument` upon document creation\n * \t\t\t\t or can be put into the document via methods like `Node.insertBefore()` or `Node.replaceChild()`\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocumentType MDN\n * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocType DOM Level 2 Core\n * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype DOM Living Standard\n *\n * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n */\n createDocumentType: function (qualifiedName, publicId, systemId) {\n var node = new DocumentType();\n node.name = qualifiedName;\n node.nodeName = qualifiedName;\n node.publicId = publicId || '';\n node.systemId = systemId || '';\n return node;\n }\n };\n\n /**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247\n */\n\n function Node() {}\n Node.prototype = {\n firstChild: null,\n lastChild: null,\n previousSibling: null,\n nextSibling: null,\n attributes: null,\n parentNode: null,\n childNodes: null,\n ownerDocument: null,\n nodeValue: null,\n namespaceURI: null,\n prefix: null,\n localName: null,\n // Modified in DOM Level 2:\n insertBefore: function (newChild, refChild) {\n //raises\n return _insertBefore(this, newChild, refChild);\n },\n replaceChild: function (newChild, oldChild) {\n //raises\n _insertBefore(this, newChild, oldChild, assertPreReplacementValidityInDocument);\n if (oldChild) {\n this.removeChild(oldChild);\n }\n },\n removeChild: function (oldChild) {\n return _removeChild(this, oldChild);\n },\n appendChild: function (newChild) {\n return this.insertBefore(newChild, null);\n },\n hasChildNodes: function () {\n return this.firstChild != null;\n },\n cloneNode: function (deep) {\n return cloneNode(this.ownerDocument || this, this, deep);\n },\n // Modified in DOM Level 2:\n normalize: function () {\n var child = this.firstChild;\n while (child) {\n var next = child.nextSibling;\n if (next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE) {\n this.removeChild(next);\n child.appendData(next.data);\n } else {\n child.normalize();\n child = next;\n }\n }\n },\n // Introduced in DOM Level 2:\n isSupported: function (feature, version) {\n return this.ownerDocument.implementation.hasFeature(feature, version);\n },\n // Introduced in DOM Level 2:\n hasAttributes: function () {\n return this.attributes.length > 0;\n },\n /**\n * Look up the prefix associated to the given namespace URI, starting from this node.\n * **The default namespace declarations are ignored by this method.**\n * See Namespace Prefix Lookup for details on the algorithm used by this method.\n *\n * _Note: The implementation seems to be incomplete when compared to the algorithm described in the specs._\n *\n * @param {string | null} namespaceURI\n * @returns {string | null}\n * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespacePrefix\n * @see https://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#lookupNamespacePrefixAlgo\n * @see https://dom.spec.whatwg.org/#dom-node-lookupprefix\n * @see https://github.com/xmldom/xmldom/issues/322\n */\n lookupPrefix: function (namespaceURI) {\n var el = this;\n while (el) {\n var map = el._nsMap;\n //console.dir(map)\n if (map) {\n for (var n in map) {\n if (Object.prototype.hasOwnProperty.call(map, n) && map[n] === namespaceURI) {\n return n;\n }\n }\n }\n el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;\n }\n return null;\n },\n // Introduced in DOM Level 3:\n lookupNamespaceURI: function (prefix) {\n var el = this;\n while (el) {\n var map = el._nsMap;\n //console.dir(map)\n if (map) {\n if (Object.prototype.hasOwnProperty.call(map, prefix)) {\n return map[prefix];\n }\n }\n el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;\n }\n return null;\n },\n // Introduced in DOM Level 3:\n isDefaultNamespace: function (namespaceURI) {\n var prefix = this.lookupPrefix(namespaceURI);\n return prefix == null;\n }\n };\n function _xmlEncoder(c) {\n return c == '<' && '<' || c == '>' && '>' || c == '&' && '&' || c == '\"' && '"' || '&#' + c.charCodeAt() + ';';\n }\n copy(NodeType, Node);\n copy(NodeType, Node.prototype);\n\n /**\n * @param callback return true for continue,false for break\n * @return boolean true: break visit;\n */\n function _visitNode(node, callback) {\n if (callback(node)) {\n return true;\n }\n if (node = node.firstChild) {\n do {\n if (_visitNode(node, callback)) {\n return true;\n }\n } while (node = node.nextSibling);\n }\n }\n function Document() {\n this.ownerDocument = this;\n }\n function _onAddAttribute(doc, el, newAttr) {\n doc && doc._inc++;\n var ns = newAttr.namespaceURI;\n if (ns === NAMESPACE$2.XMLNS) {\n //update namespace\n el._nsMap[newAttr.prefix ? newAttr.localName : ''] = newAttr.value;\n }\n }\n function _onRemoveAttribute(doc, el, newAttr, remove) {\n doc && doc._inc++;\n var ns = newAttr.namespaceURI;\n if (ns === NAMESPACE$2.XMLNS) {\n //update namespace\n delete el._nsMap[newAttr.prefix ? newAttr.localName : ''];\n }\n }\n\n /**\n * Updates `el.childNodes`, updating the indexed items and it's `length`.\n * Passing `newChild` means it will be appended.\n * Otherwise it's assumed that an item has been removed,\n * and `el.firstNode` and it's `.nextSibling` are used\n * to walk the current list of child nodes.\n *\n * @param {Document} doc\n * @param {Node} el\n * @param {Node} [newChild]\n * @private\n */\n function _onUpdateChild(doc, el, newChild) {\n if (doc && doc._inc) {\n doc._inc++;\n //update childNodes\n var cs = el.childNodes;\n if (newChild) {\n cs[cs.length++] = newChild;\n } else {\n var child = el.firstChild;\n var i = 0;\n while (child) {\n cs[i++] = child;\n child = child.nextSibling;\n }\n cs.length = i;\n delete cs[cs.length];\n }\n }\n }\n\n /**\n * Removes the connections between `parentNode` and `child`\n * and any existing `child.previousSibling` or `child.nextSibling`.\n *\n * @see https://github.com/xmldom/xmldom/issues/135\n * @see https://github.com/xmldom/xmldom/issues/145\n *\n * @param {Node} parentNode\n * @param {Node} child\n * @returns {Node} the child that was removed.\n * @private\n */\n function _removeChild(parentNode, child) {\n var previous = child.previousSibling;\n var next = child.nextSibling;\n if (previous) {\n previous.nextSibling = next;\n } else {\n parentNode.firstChild = next;\n }\n if (next) {\n next.previousSibling = previous;\n } else {\n parentNode.lastChild = previous;\n }\n child.parentNode = null;\n child.previousSibling = null;\n child.nextSibling = null;\n _onUpdateChild(parentNode.ownerDocument, parentNode);\n return child;\n }\n\n /**\n * Returns `true` if `node` can be a parent for insertion.\n * @param {Node} node\n * @returns {boolean}\n */\n function hasValidParentNodeType(node) {\n return node && (node.nodeType === Node.DOCUMENT_NODE || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE || node.nodeType === Node.ELEMENT_NODE);\n }\n\n /**\n * Returns `true` if `node` can be inserted according to it's `nodeType`.\n * @param {Node} node\n * @returns {boolean}\n */\n function hasInsertableNodeType(node) {\n return node && (isElementNode(node) || isTextNode(node) || isDocTypeNode(node) || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE || node.nodeType === Node.COMMENT_NODE || node.nodeType === Node.PROCESSING_INSTRUCTION_NODE);\n }\n\n /**\n * Returns true if `node` is a DOCTYPE node\n * @param {Node} node\n * @returns {boolean}\n */\n function isDocTypeNode(node) {\n return node && node.nodeType === Node.DOCUMENT_TYPE_NODE;\n }\n\n /**\n * Returns true if the node is an element\n * @param {Node} node\n * @returns {boolean}\n */\n function isElementNode(node) {\n return node && node.nodeType === Node.ELEMENT_NODE;\n }\n /**\n * Returns true if `node` is a text node\n * @param {Node} node\n * @returns {boolean}\n */\n function isTextNode(node) {\n return node && node.nodeType === Node.TEXT_NODE;\n }\n\n /**\n * Check if en element node can be inserted before `child`, or at the end if child is falsy,\n * according to the presence and position of a doctype node on the same level.\n *\n * @param {Document} doc The document node\n * @param {Node} child the node that would become the nextSibling if the element would be inserted\n * @returns {boolean} `true` if an element can be inserted before child\n * @private\n * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\n function isElementInsertionPossible(doc, child) {\n var parentChildNodes = doc.childNodes || [];\n if (find(parentChildNodes, isElementNode) || isDocTypeNode(child)) {\n return false;\n }\n var docTypeNode = find(parentChildNodes, isDocTypeNode);\n return !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));\n }\n\n /**\n * Check if en element node can be inserted before `child`, or at the end if child is falsy,\n * according to the presence and position of a doctype node on the same level.\n *\n * @param {Node} doc The document node\n * @param {Node} child the node that would become the nextSibling if the element would be inserted\n * @returns {boolean} `true` if an element can be inserted before child\n * @private\n * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\n function isElementReplacementPossible(doc, child) {\n var parentChildNodes = doc.childNodes || [];\n function hasElementChildThatIsNotChild(node) {\n return isElementNode(node) && node !== child;\n }\n if (find(parentChildNodes, hasElementChildThatIsNotChild)) {\n return false;\n }\n var docTypeNode = find(parentChildNodes, isDocTypeNode);\n return !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));\n }\n\n /**\n * @private\n * Steps 1-5 of the checks before inserting and before replacing a child are the same.\n *\n * @param {Node} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node=} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\n function assertPreInsertionValidity1to5(parent, node, child) {\n // 1. If `parent` is not a Document, DocumentFragment, or Element node, then throw a \"HierarchyRequestError\" DOMException.\n if (!hasValidParentNodeType(parent)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Unexpected parent node type ' + parent.nodeType);\n }\n // 2. If `node` is a host-including inclusive ancestor of `parent`, then throw a \"HierarchyRequestError\" DOMException.\n // not implemented!\n // 3. If `child` is non-null and its parent is not `parent`, then throw a \"NotFoundError\" DOMException.\n if (child && child.parentNode !== parent) {\n throw new DOMException(NOT_FOUND_ERR, 'child not in parent');\n }\n if (\n // 4. If `node` is not a DocumentFragment, DocumentType, Element, or CharacterData node, then throw a \"HierarchyRequestError\" DOMException.\n !hasInsertableNodeType(node) ||\n // 5. If either `node` is a Text node and `parent` is a document,\n // the sax parser currently adds top level text nodes, this will be fixed in 0.9.0\n // || (node.nodeType === Node.TEXT_NODE && parent.nodeType === Node.DOCUMENT_NODE)\n // or `node` is a doctype and `parent` is not a document, then throw a \"HierarchyRequestError\" DOMException.\n isDocTypeNode(node) && parent.nodeType !== Node.DOCUMENT_NODE) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Unexpected node type ' + node.nodeType + ' for parent node type ' + parent.nodeType);\n }\n }\n\n /**\n * @private\n * Step 6 of the checks before inserting and before replacing a child are different.\n *\n * @param {Document} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node | undefined} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\n function assertPreInsertionValidityInDocument(parent, node, child) {\n var parentChildNodes = parent.childNodes || [];\n var nodeChildNodes = node.childNodes || [];\n\n // DocumentFragment\n if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {\n var nodeChildElements = nodeChildNodes.filter(isElementNode);\n // If node has more than one element child or has a Text node child.\n if (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');\n }\n // Otherwise, if `node` has one element child and either `parent` has an element child,\n // `child` is a doctype, or `child` is non-null and a doctype is following `child`.\n if (nodeChildElements.length === 1 && !isElementInsertionPossible(parent, child)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');\n }\n }\n // Element\n if (isElementNode(node)) {\n // `parent` has an element child, `child` is a doctype,\n // or `child` is non-null and a doctype is following `child`.\n if (!isElementInsertionPossible(parent, child)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');\n }\n }\n // DocumentType\n if (isDocTypeNode(node)) {\n // `parent` has a doctype child,\n if (find(parentChildNodes, isDocTypeNode)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');\n }\n var parentElementChild = find(parentChildNodes, isElementNode);\n // `child` is non-null and an element is preceding `child`,\n if (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');\n }\n // or `child` is null and `parent` has an element child.\n if (!child && parentElementChild) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can not be appended since element is present');\n }\n }\n }\n\n /**\n * @private\n * Step 6 of the checks before inserting and before replacing a child are different.\n *\n * @param {Document} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node | undefined} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\n function assertPreReplacementValidityInDocument(parent, node, child) {\n var parentChildNodes = parent.childNodes || [];\n var nodeChildNodes = node.childNodes || [];\n\n // DocumentFragment\n if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {\n var nodeChildElements = nodeChildNodes.filter(isElementNode);\n // If `node` has more than one element child or has a Text node child.\n if (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');\n }\n // Otherwise, if `node` has one element child and either `parent` has an element child that is not `child` or a doctype is following `child`.\n if (nodeChildElements.length === 1 && !isElementReplacementPossible(parent, child)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');\n }\n }\n // Element\n if (isElementNode(node)) {\n // `parent` has an element child that is not `child` or a doctype is following `child`.\n if (!isElementReplacementPossible(parent, child)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');\n }\n }\n // DocumentType\n if (isDocTypeNode(node)) {\n function hasDoctypeChildThatIsNotChild(node) {\n return isDocTypeNode(node) && node !== child;\n }\n\n // `parent` has a doctype child that is not `child`,\n if (find(parentChildNodes, hasDoctypeChildThatIsNotChild)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');\n }\n var parentElementChild = find(parentChildNodes, isElementNode);\n // or an element is preceding `child`.\n if (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {\n throw new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');\n }\n }\n }\n\n /**\n * @private\n * @param {Node} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node=} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\n function _insertBefore(parent, node, child, _inDocumentAssertion) {\n // To ensure pre-insertion validity of a node into a parent before a child, run these steps:\n assertPreInsertionValidity1to5(parent, node, child);\n\n // If parent is a document, and any of the statements below, switched on the interface node implements,\n // are true, then throw a \"HierarchyRequestError\" DOMException.\n if (parent.nodeType === Node.DOCUMENT_NODE) {\n (_inDocumentAssertion || assertPreInsertionValidityInDocument)(parent, node, child);\n }\n var cp = node.parentNode;\n if (cp) {\n cp.removeChild(node); //remove and update\n }\n\n if (node.nodeType === DOCUMENT_FRAGMENT_NODE) {\n var newFirst = node.firstChild;\n if (newFirst == null) {\n return node;\n }\n var newLast = node.lastChild;\n } else {\n newFirst = newLast = node;\n }\n var pre = child ? child.previousSibling : parent.lastChild;\n newFirst.previousSibling = pre;\n newLast.nextSibling = child;\n if (pre) {\n pre.nextSibling = newFirst;\n } else {\n parent.firstChild = newFirst;\n }\n if (child == null) {\n parent.lastChild = newLast;\n } else {\n child.previousSibling = newLast;\n }\n do {\n newFirst.parentNode = parent;\n } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));\n _onUpdateChild(parent.ownerDocument || parent, parent);\n //console.log(parent.lastChild.nextSibling == null)\n if (node.nodeType == DOCUMENT_FRAGMENT_NODE) {\n node.firstChild = node.lastChild = null;\n }\n return node;\n }\n\n /**\n * Appends `newChild` to `parentNode`.\n * If `newChild` is already connected to a `parentNode` it is first removed from it.\n *\n * @see https://github.com/xmldom/xmldom/issues/135\n * @see https://github.com/xmldom/xmldom/issues/145\n * @param {Node} parentNode\n * @param {Node} newChild\n * @returns {Node}\n * @private\n */\n function _appendSingleChild(parentNode, newChild) {\n if (newChild.parentNode) {\n newChild.parentNode.removeChild(newChild);\n }\n newChild.parentNode = parentNode;\n newChild.previousSibling = parentNode.lastChild;\n newChild.nextSibling = null;\n if (newChild.previousSibling) {\n newChild.previousSibling.nextSibling = newChild;\n } else {\n parentNode.firstChild = newChild;\n }\n parentNode.lastChild = newChild;\n _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);\n return newChild;\n }\n Document.prototype = {\n //implementation : null,\n nodeName: '#document',\n nodeType: DOCUMENT_NODE,\n /**\n * The DocumentType node of the document.\n *\n * @readonly\n * @type DocumentType\n */\n doctype: null,\n documentElement: null,\n _inc: 1,\n insertBefore: function (newChild, refChild) {\n //raises\n if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {\n var child = newChild.firstChild;\n while (child) {\n var next = child.nextSibling;\n this.insertBefore(child, refChild);\n child = next;\n }\n return newChild;\n }\n _insertBefore(this, newChild, refChild);\n newChild.ownerDocument = this;\n if (this.documentElement === null && newChild.nodeType === ELEMENT_NODE) {\n this.documentElement = newChild;\n }\n return newChild;\n },\n removeChild: function (oldChild) {\n if (this.documentElement == oldChild) {\n this.documentElement = null;\n }\n return _removeChild(this, oldChild);\n },\n replaceChild: function (newChild, oldChild) {\n //raises\n _insertBefore(this, newChild, oldChild, assertPreReplacementValidityInDocument);\n newChild.ownerDocument = this;\n if (oldChild) {\n this.removeChild(oldChild);\n }\n if (isElementNode(newChild)) {\n this.documentElement = newChild;\n }\n },\n // Introduced in DOM Level 2:\n importNode: function (importedNode, deep) {\n return importNode(this, importedNode, deep);\n },\n // Introduced in DOM Level 2:\n getElementById: function (id) {\n var rtv = null;\n _visitNode(this.documentElement, function (node) {\n if (node.nodeType == ELEMENT_NODE) {\n if (node.getAttribute('id') == id) {\n rtv = node;\n return true;\n }\n }\n });\n return rtv;\n },\n /**\n * The `getElementsByClassName` method of `Document` interface returns an array-like object\n * of all child elements which have **all** of the given class name(s).\n *\n * Returns an empty list if `classeNames` is an empty string or only contains HTML white space characters.\n *\n *\n * Warning: This is a live LiveNodeList.\n * Changes in the DOM will reflect in the array as the changes occur.\n * If an element selected by this array no longer qualifies for the selector,\n * it will automatically be removed. Be aware of this for iteration purposes.\n *\n * @param {string} classNames is a string representing the class name(s) to match; multiple class names are separated by (ASCII-)whitespace\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName\n * @see https://dom.spec.whatwg.org/#concept-getelementsbyclassname\n */\n getElementsByClassName: function (classNames) {\n var classNamesSet = toOrderedSet(classNames);\n return new LiveNodeList(this, function (base) {\n var ls = [];\n if (classNamesSet.length > 0) {\n _visitNode(base.documentElement, function (node) {\n if (node !== base && node.nodeType === ELEMENT_NODE) {\n var nodeClassNames = node.getAttribute('class');\n // can be null if the attribute does not exist\n if (nodeClassNames) {\n // before splitting and iterating just compare them for the most common case\n var matches = classNames === nodeClassNames;\n if (!matches) {\n var nodeClassNamesSet = toOrderedSet(nodeClassNames);\n matches = classNamesSet.every(arrayIncludes(nodeClassNamesSet));\n }\n if (matches) {\n ls.push(node);\n }\n }\n }\n });\n }\n return ls;\n });\n },\n //document factory method:\n createElement: function (tagName) {\n var node = new Element();\n node.ownerDocument = this;\n node.nodeName = tagName;\n node.tagName = tagName;\n node.localName = tagName;\n node.childNodes = new NodeList();\n var attrs = node.attributes = new NamedNodeMap();\n attrs._ownerElement = node;\n return node;\n },\n createDocumentFragment: function () {\n var node = new DocumentFragment();\n node.ownerDocument = this;\n node.childNodes = new NodeList();\n return node;\n },\n createTextNode: function (data) {\n var node = new Text();\n node.ownerDocument = this;\n node.appendData(data);\n return node;\n },\n createComment: function (data) {\n var node = new Comment();\n node.ownerDocument = this;\n node.appendData(data);\n return node;\n },\n createCDATASection: function (data) {\n var node = new CDATASection();\n node.ownerDocument = this;\n node.appendData(data);\n return node;\n },\n createProcessingInstruction: function (target, data) {\n var node = new ProcessingInstruction();\n node.ownerDocument = this;\n node.tagName = node.target = target;\n node.nodeValue = node.data = data;\n return node;\n },\n createAttribute: function (name) {\n var node = new Attr();\n node.ownerDocument = this;\n node.name = name;\n node.nodeName = name;\n node.localName = name;\n node.specified = true;\n return node;\n },\n createEntityReference: function (name) {\n var node = new EntityReference();\n node.ownerDocument = this;\n node.nodeName = name;\n return node;\n },\n // Introduced in DOM Level 2:\n createElementNS: function (namespaceURI, qualifiedName) {\n var node = new Element();\n var pl = qualifiedName.split(':');\n var attrs = node.attributes = new NamedNodeMap();\n node.childNodes = new NodeList();\n node.ownerDocument = this;\n node.nodeName = qualifiedName;\n node.tagName = qualifiedName;\n node.namespaceURI = namespaceURI;\n if (pl.length == 2) {\n node.prefix = pl[0];\n node.localName = pl[1];\n } else {\n //el.prefix = null;\n node.localName = qualifiedName;\n }\n attrs._ownerElement = node;\n return node;\n },\n // Introduced in DOM Level 2:\n createAttributeNS: function (namespaceURI, qualifiedName) {\n var node = new Attr();\n var pl = qualifiedName.split(':');\n node.ownerDocument = this;\n node.nodeName = qualifiedName;\n node.name = qualifiedName;\n node.namespaceURI = namespaceURI;\n node.specified = true;\n if (pl.length == 2) {\n node.prefix = pl[0];\n node.localName = pl[1];\n } else {\n //el.prefix = null;\n node.localName = qualifiedName;\n }\n return node;\n }\n };\n _extends(Document, Node);\n function Element() {\n this._nsMap = {};\n }\n Element.prototype = {\n nodeType: ELEMENT_NODE,\n hasAttribute: function (name) {\n return this.getAttributeNode(name) != null;\n },\n getAttribute: function (name) {\n var attr = this.getAttributeNode(name);\n return attr && attr.value || '';\n },\n getAttributeNode: function (name) {\n return this.attributes.getNamedItem(name);\n },\n setAttribute: function (name, value) {\n var attr = this.ownerDocument.createAttribute(name);\n attr.value = attr.nodeValue = \"\" + value;\n this.setAttributeNode(attr);\n },\n removeAttribute: function (name) {\n var attr = this.getAttributeNode(name);\n attr && this.removeAttributeNode(attr);\n },\n //four real opeartion method\n appendChild: function (newChild) {\n if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {\n return this.insertBefore(newChild, null);\n } else {\n return _appendSingleChild(this, newChild);\n }\n },\n setAttributeNode: function (newAttr) {\n return this.attributes.setNamedItem(newAttr);\n },\n setAttributeNodeNS: function (newAttr) {\n return this.attributes.setNamedItemNS(newAttr);\n },\n removeAttributeNode: function (oldAttr) {\n //console.log(this == oldAttr.ownerElement)\n return this.attributes.removeNamedItem(oldAttr.nodeName);\n },\n //get real attribute name,and remove it by removeAttributeNode\n removeAttributeNS: function (namespaceURI, localName) {\n var old = this.getAttributeNodeNS(namespaceURI, localName);\n old && this.removeAttributeNode(old);\n },\n hasAttributeNS: function (namespaceURI, localName) {\n return this.getAttributeNodeNS(namespaceURI, localName) != null;\n },\n getAttributeNS: function (namespaceURI, localName) {\n var attr = this.getAttributeNodeNS(namespaceURI, localName);\n return attr && attr.value || '';\n },\n setAttributeNS: function (namespaceURI, qualifiedName, value) {\n var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);\n attr.value = attr.nodeValue = \"\" + value;\n this.setAttributeNode(attr);\n },\n getAttributeNodeNS: function (namespaceURI, localName) {\n return this.attributes.getNamedItemNS(namespaceURI, localName);\n },\n getElementsByTagName: function (tagName) {\n return new LiveNodeList(this, function (base) {\n var ls = [];\n _visitNode(base, function (node) {\n if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {\n ls.push(node);\n }\n });\n return ls;\n });\n },\n getElementsByTagNameNS: function (namespaceURI, localName) {\n return new LiveNodeList(this, function (base) {\n var ls = [];\n _visitNode(base, function (node) {\n if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {\n ls.push(node);\n }\n });\n return ls;\n });\n }\n };\n Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;\n Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;\n _extends(Element, Node);\n function Attr() {}\n Attr.prototype.nodeType = ATTRIBUTE_NODE;\n _extends(Attr, Node);\n function CharacterData() {}\n CharacterData.prototype = {\n data: '',\n substringData: function (offset, count) {\n return this.data.substring(offset, offset + count);\n },\n appendData: function (text) {\n text = this.data + text;\n this.nodeValue = this.data = text;\n this.length = text.length;\n },\n insertData: function (offset, text) {\n this.replaceData(offset, 0, text);\n },\n appendChild: function (newChild) {\n throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR]);\n },\n deleteData: function (offset, count) {\n this.replaceData(offset, count, \"\");\n },\n replaceData: function (offset, count, text) {\n var start = this.data.substring(0, offset);\n var end = this.data.substring(offset + count);\n text = start + text + end;\n this.nodeValue = this.data = text;\n this.length = text.length;\n }\n };\n _extends(CharacterData, Node);\n function Text() {}\n Text.prototype = {\n nodeName: \"#text\",\n nodeType: TEXT_NODE,\n splitText: function (offset) {\n var text = this.data;\n var newText = text.substring(offset);\n text = text.substring(0, offset);\n this.data = this.nodeValue = text;\n this.length = text.length;\n var newNode = this.ownerDocument.createTextNode(newText);\n if (this.parentNode) {\n this.parentNode.insertBefore(newNode, this.nextSibling);\n }\n return newNode;\n }\n };\n _extends(Text, CharacterData);\n function Comment() {}\n Comment.prototype = {\n nodeName: \"#comment\",\n nodeType: COMMENT_NODE\n };\n _extends(Comment, CharacterData);\n function CDATASection() {}\n CDATASection.prototype = {\n nodeName: \"#cdata-section\",\n nodeType: CDATA_SECTION_NODE\n };\n _extends(CDATASection, CharacterData);\n function DocumentType() {}\n DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;\n _extends(DocumentType, Node);\n function Notation() {}\n Notation.prototype.nodeType = NOTATION_NODE;\n _extends(Notation, Node);\n function Entity() {}\n Entity.prototype.nodeType = ENTITY_NODE;\n _extends(Entity, Node);\n function EntityReference() {}\n EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;\n _extends(EntityReference, Node);\n function DocumentFragment() {}\n DocumentFragment.prototype.nodeName = \"#document-fragment\";\n DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;\n _extends(DocumentFragment, Node);\n function ProcessingInstruction() {}\n ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;\n _extends(ProcessingInstruction, Node);\n function XMLSerializer() {}\n XMLSerializer.prototype.serializeToString = function (node, isHtml, nodeFilter) {\n return nodeSerializeToString.call(node, isHtml, nodeFilter);\n };\n Node.prototype.toString = nodeSerializeToString;\n function nodeSerializeToString(isHtml, nodeFilter) {\n var buf = [];\n var refNode = this.nodeType == 9 && this.documentElement || this;\n var prefix = refNode.prefix;\n var uri = refNode.namespaceURI;\n if (uri && prefix == null) {\n //console.log(prefix)\n var prefix = refNode.lookupPrefix(uri);\n if (prefix == null) {\n //isHTML = true;\n var visibleNamespaces = [{\n namespace: uri,\n prefix: null\n }\n //{namespace:uri,prefix:''}\n ];\n }\n }\n\n serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces);\n //console.log('###',this.nodeType,uri,prefix,buf.join(''))\n return buf.join('');\n }\n function needNamespaceDefine(node, isHTML, visibleNamespaces) {\n var prefix = node.prefix || '';\n var uri = node.namespaceURI;\n // According to [Namespaces in XML 1.0](https://www.w3.org/TR/REC-xml-names/#ns-using) ,\n // and more specifically https://www.w3.org/TR/REC-xml-names/#nsc-NoPrefixUndecl :\n // > In a namespace declaration for a prefix [...], the attribute value MUST NOT be empty.\n // in a similar manner [Namespaces in XML 1.1](https://www.w3.org/TR/xml-names11/#ns-using)\n // and more specifically https://www.w3.org/TR/xml-names11/#nsc-NSDeclared :\n // > [...] Furthermore, the attribute value [...] must not be an empty string.\n // so serializing empty namespace value like xmlns:ds=\"\" would produce an invalid XML document.\n if (!uri) {\n return false;\n }\n if (prefix === \"xml\" && uri === NAMESPACE$2.XML || uri === NAMESPACE$2.XMLNS) {\n return false;\n }\n var i = visibleNamespaces.length;\n while (i--) {\n var ns = visibleNamespaces[i];\n // get namespace prefix\n if (ns.prefix === prefix) {\n return ns.namespace !== uri;\n }\n }\n return true;\n }\n /**\n * Well-formed constraint: No < in Attribute Values\n * > The replacement text of any entity referred to directly or indirectly\n * > in an attribute value must not contain a <.\n * @see https://www.w3.org/TR/xml11/#CleanAttrVals\n * @see https://www.w3.org/TR/xml11/#NT-AttValue\n *\n * Literal whitespace other than space that appear in attribute values\n * are serialized as their entity references, so they will be preserved.\n * (In contrast to whitespace literals in the input which are normalized to spaces)\n * @see https://www.w3.org/TR/xml11/#AVNormalize\n * @see https://w3c.github.io/DOM-Parsing/#serializing-an-element-s-attributes\n */\n function addSerializedAttribute(buf, qualifiedName, value) {\n buf.push(' ', qualifiedName, '=\"', value.replace(/[<>&\"\\t\\n\\r]/g, _xmlEncoder), '\"');\n }\n function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {\n if (!visibleNamespaces) {\n visibleNamespaces = [];\n }\n if (nodeFilter) {\n node = nodeFilter(node);\n if (node) {\n if (typeof node == 'string') {\n buf.push(node);\n return;\n }\n } else {\n return;\n }\n //buf.sort.apply(attrs, attributeSorter);\n }\n\n switch (node.nodeType) {\n case ELEMENT_NODE:\n var attrs = node.attributes;\n var len = attrs.length;\n var child = node.firstChild;\n var nodeName = node.tagName;\n isHTML = NAMESPACE$2.isHTML(node.namespaceURI) || isHTML;\n var prefixedNodeName = nodeName;\n if (!isHTML && !node.prefix && node.namespaceURI) {\n var defaultNS;\n // lookup current default ns from `xmlns` attribute\n for (var ai = 0; ai < attrs.length; ai++) {\n if (attrs.item(ai).name === 'xmlns') {\n defaultNS = attrs.item(ai).value;\n break;\n }\n }\n if (!defaultNS) {\n // lookup current default ns in visibleNamespaces\n for (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n var namespace = visibleNamespaces[nsi];\n if (namespace.prefix === '' && namespace.namespace === node.namespaceURI) {\n defaultNS = namespace.namespace;\n break;\n }\n }\n }\n if (defaultNS !== node.namespaceURI) {\n for (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n var namespace = visibleNamespaces[nsi];\n if (namespace.namespace === node.namespaceURI) {\n if (namespace.prefix) {\n prefixedNodeName = namespace.prefix + ':' + nodeName;\n }\n break;\n }\n }\n }\n }\n buf.push('<', prefixedNodeName);\n for (var i = 0; i < len; i++) {\n // add namespaces for attributes\n var attr = attrs.item(i);\n if (attr.prefix == 'xmlns') {\n visibleNamespaces.push({\n prefix: attr.localName,\n namespace: attr.value\n });\n } else if (attr.nodeName == 'xmlns') {\n visibleNamespaces.push({\n prefix: '',\n namespace: attr.value\n });\n }\n }\n for (var i = 0; i < len; i++) {\n var attr = attrs.item(i);\n if (needNamespaceDefine(attr, isHTML, visibleNamespaces)) {\n var prefix = attr.prefix || '';\n var uri = attr.namespaceURI;\n addSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n visibleNamespaces.push({\n prefix: prefix,\n namespace: uri\n });\n }\n serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);\n }\n\n // add namespace for current node\n if (nodeName === prefixedNodeName && needNamespaceDefine(node, isHTML, visibleNamespaces)) {\n var prefix = node.prefix || '';\n var uri = node.namespaceURI;\n addSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n visibleNamespaces.push({\n prefix: prefix,\n namespace: uri\n });\n }\n if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {\n buf.push('>');\n //if is cdata child node\n if (isHTML && /^script$/i.test(nodeName)) {\n while (child) {\n if (child.data) {\n buf.push(child.data);\n } else {\n serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n }\n child = child.nextSibling;\n }\n } else {\n while (child) {\n serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n child = child.nextSibling;\n }\n }\n buf.push('</', prefixedNodeName, '>');\n } else {\n buf.push('/>');\n }\n // remove added visible namespaces\n //visibleNamespaces.length = startVisibleNamespaces;\n return;\n case DOCUMENT_NODE:\n case DOCUMENT_FRAGMENT_NODE:\n var child = node.firstChild;\n while (child) {\n serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n child = child.nextSibling;\n }\n return;\n case ATTRIBUTE_NODE:\n return addSerializedAttribute(buf, node.name, node.value);\n case TEXT_NODE:\n /**\n * The ampersand character (&) and the left angle bracket (<) must not appear in their literal form,\n * except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.\n * If they are needed elsewhere, they must be escaped using either numeric character references or the strings\n * `&` and `<` respectively.\n * The right angle bracket (>) may be represented using the string \" > \", and must, for compatibility,\n * be escaped using either `>` or a character reference when it appears in the string `]]>` in content,\n * when that string is not marking the end of a CDATA section.\n *\n * In the content of elements, character data is any string of characters\n * which does not contain the start-delimiter of any markup\n * and does not include the CDATA-section-close delimiter, `]]>`.\n *\n * @see https://www.w3.org/TR/xml/#NT-CharData\n * @see https://w3c.github.io/DOM-Parsing/#xml-serializing-a-text-node\n */\n return buf.push(node.data.replace(/[<&>]/g, _xmlEncoder));\n case CDATA_SECTION_NODE:\n return buf.push('<![CDATA[', node.data, ']]>');\n case COMMENT_NODE:\n return buf.push(\"<!--\", node.data, \"-->\");\n case DOCUMENT_TYPE_NODE:\n var pubid = node.publicId;\n var sysid = node.systemId;\n buf.push('<!DOCTYPE ', node.name);\n if (pubid) {\n buf.push(' PUBLIC ', pubid);\n if (sysid && sysid != '.') {\n buf.push(' ', sysid);\n }\n buf.push('>');\n } else if (sysid && sysid != '.') {\n buf.push(' SYSTEM ', sysid, '>');\n } else {\n var sub = node.internalSubset;\n if (sub) {\n buf.push(\" [\", sub, \"]\");\n }\n buf.push(\">\");\n }\n return;\n case PROCESSING_INSTRUCTION_NODE:\n return buf.push(\"<?\", node.target, \" \", node.data, \"?>\");\n case ENTITY_REFERENCE_NODE:\n return buf.push('&', node.nodeName, ';');\n //case ENTITY_NODE:\n //case NOTATION_NODE:\n default:\n buf.push('??', node.nodeName);\n }\n }\n function importNode(doc, node, deep) {\n var node2;\n switch (node.nodeType) {\n case ELEMENT_NODE:\n node2 = node.cloneNode(false);\n node2.ownerDocument = doc;\n //var attrs = node2.attributes;\n //var len = attrs.length;\n //for(var i=0;i<len;i++){\n //node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));\n //}\n case DOCUMENT_FRAGMENT_NODE:\n break;\n case ATTRIBUTE_NODE:\n deep = true;\n break;\n //case ENTITY_REFERENCE_NODE:\n //case PROCESSING_INSTRUCTION_NODE:\n ////case TEXT_NODE:\n //case CDATA_SECTION_NODE:\n //case COMMENT_NODE:\n //\tdeep = false;\n //\tbreak;\n //case DOCUMENT_NODE:\n //case DOCUMENT_TYPE_NODE:\n //cannot be imported.\n //case ENTITY_NODE:\n //case NOTATION_NODE：\n //can not hit in level3\n //default:throw e;\n }\n\n if (!node2) {\n node2 = node.cloneNode(false); //false\n }\n\n node2.ownerDocument = doc;\n node2.parentNode = null;\n if (deep) {\n var child = node.firstChild;\n while (child) {\n node2.appendChild(importNode(doc, child, deep));\n child = child.nextSibling;\n }\n }\n return node2;\n }\n //\n //var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,\n //\t\t\t\t\tattributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};\n function cloneNode(doc, node, deep) {\n var node2 = new node.constructor();\n for (var n in node) {\n if (Object.prototype.hasOwnProperty.call(node, n)) {\n var v = node[n];\n if (typeof v != \"object\") {\n if (v != node2[n]) {\n node2[n] = v;\n }\n }\n }\n }\n if (node.childNodes) {\n node2.childNodes = new NodeList();\n }\n node2.ownerDocument = doc;\n switch (node2.nodeType) {\n case ELEMENT_NODE:\n var attrs = node.attributes;\n var attrs2 = node2.attributes = new NamedNodeMap();\n var len = attrs.length;\n attrs2._ownerElement = node2;\n for (var i = 0; i < len; i++) {\n node2.setAttributeNode(cloneNode(doc, attrs.item(i), true));\n }\n break;\n case ATTRIBUTE_NODE:\n deep = true;\n }\n if (deep) {\n var child = node.firstChild;\n while (child) {\n node2.appendChild(cloneNode(doc, child, deep));\n child = child.nextSibling;\n }\n }\n return node2;\n }\n function __set__(object, key, value) {\n object[key] = value;\n }\n //do dynamic\n try {\n if (Object.defineProperty) {\n Object.defineProperty(LiveNodeList.prototype, 'length', {\n get: function () {\n _updateLiveList(this);\n return this.$$length;\n }\n });\n Object.defineProperty(Node.prototype, 'textContent', {\n get: function () {\n return getTextContent(this);\n },\n set: function (data) {\n switch (this.nodeType) {\n case ELEMENT_NODE:\n case DOCUMENT_FRAGMENT_NODE:\n while (this.firstChild) {\n this.removeChild(this.firstChild);\n }\n if (data || String(data)) {\n this.appendChild(this.ownerDocument.createTextNode(data));\n }\n break;\n default:\n this.data = data;\n this.value = data;\n this.nodeValue = data;\n }\n }\n });\n function getTextContent(node) {\n switch (node.nodeType) {\n case ELEMENT_NODE:\n case DOCUMENT_FRAGMENT_NODE:\n var buf = [];\n node = node.firstChild;\n while (node) {\n if (node.nodeType !== 7 && node.nodeType !== 8) {\n buf.push(getTextContent(node));\n }\n node = node.nextSibling;\n }\n return buf.join('');\n default:\n return node.nodeValue;\n }\n }\n __set__ = function (object, key, value) {\n //console.log(value)\n object['$$' + key] = value;\n };\n }\n } catch (e) {//ie8\n }\n\n //if(typeof require == 'function'){\n var DocumentType_1 = DocumentType;\n var DOMException_1 = DOMException;\n var DOMImplementation_1 = DOMImplementation$1;\n var Element_1 = Element;\n var Node_1 = Node;\n var NodeList_1 = NodeList;\n var XMLSerializer_1 = XMLSerializer;\n //}\n\n var dom = {\n DocumentType: DocumentType_1,\n DOMException: DOMException_1,\n DOMImplementation: DOMImplementation_1,\n Element: Element_1,\n Node: Node_1,\n NodeList: NodeList_1,\n XMLSerializer: XMLSerializer_1\n };\n\n var entities = createCommonjsModule(function (module, exports) {\n var freeze = conventions.freeze;\n\n /**\n * The entities that are predefined in every XML document.\n *\n * @see https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-predefined-ent W3C XML 1.1\n * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent W3C XML 1.0\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Predefined_entities_in_XML Wikipedia\n */\n exports.XML_ENTITIES = freeze({\n amp: '&',\n apos: \"'\",\n gt: '>',\n lt: '<',\n quot: '\"'\n });\n\n /**\n * A map of currently 241 entities that are detected in an HTML document.\n * They contain all entries from `XML_ENTITIES`.\n *\n * @see XML_ENTITIES\n * @see DOMParser.parseFromString\n * @see DOMImplementation.prototype.createHTMLDocument\n * @see https://html.spec.whatwg.org/#named-character-references WHATWG HTML(5) Spec\n * @see https://www.w3.org/TR/xml-entity-names/ W3C XML Entity Names\n * @see https://www.w3.org/TR/html4/sgml/entities.html W3C HTML4/SGML\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_entity_references_in_HTML Wikipedia (HTML)\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Entities_representing_special_characters_in_XHTML Wikpedia (XHTML)\n */\n exports.HTML_ENTITIES = freeze({\n lt: '<',\n gt: '>',\n amp: '&',\n quot: '\"',\n apos: \"'\",\n Agrave: \"À\",\n Aacute: \"Á\",\n Acirc: \"Â\",\n Atilde: \"Ã\",\n Auml: \"Ä\",\n Aring: \"Å\",\n AElig: \"Æ\",\n Ccedil: \"Ç\",\n Egrave: \"È\",\n Eacute: \"É\",\n Ecirc: \"Ê\",\n Euml: \"Ë\",\n Igrave: \"Ì\",\n Iacute: \"Í\",\n Icirc: \"Î\",\n Iuml: \"Ï\",\n ETH: \"Ð\",\n Ntilde: \"Ñ\",\n Ograve: \"Ò\",\n Oacute: \"Ó\",\n Ocirc: \"Ô\",\n Otilde: \"Õ\",\n Ouml: \"Ö\",\n Oslash: \"Ø\",\n Ugrave: \"Ù\",\n Uacute: \"Ú\",\n Ucirc: \"Û\",\n Uuml: \"Ü\",\n Yacute: \"Ý\",\n THORN: \"Þ\",\n szlig: \"ß\",\n agrave: \"à\",\n aacute: \"á\",\n acirc: \"â\",\n atilde: \"ã\",\n auml: \"ä\",\n aring: \"å\",\n aelig: \"æ\",\n ccedil: \"ç\",\n egrave: \"è\",\n eacute: \"é\",\n ecirc: \"ê\",\n euml: \"ë\",\n igrave: \"ì\",\n iacute: \"í\",\n icirc: \"î\",\n iuml: \"ï\",\n eth: \"ð\",\n ntilde: \"ñ\",\n ograve: \"ò\",\n oacute: \"ó\",\n ocirc: \"ô\",\n otilde: \"õ\",\n ouml: \"ö\",\n oslash: \"ø\",\n ugrave: \"ù\",\n uacute: \"ú\",\n ucirc: \"û\",\n uuml: \"ü\",\n yacute: \"ý\",\n thorn: \"þ\",\n yuml: \"ÿ\",\n nbsp: \"\\u00a0\",\n iexcl: \"¡\",\n cent: \"¢\",\n pound: \"£\",\n curren: \"¤\",\n yen: \"¥\",\n brvbar: \"¦\",\n sect: \"§\",\n uml: \"¨\",\n copy: \"©\",\n ordf: \"ª\",\n laquo: \"«\",\n not: \"¬\",\n shy: \"\",\n reg: \"®\",\n macr: \"¯\",\n deg: \"°\",\n plusmn: \"±\",\n sup2: \"²\",\n sup3: \"³\",\n acute: \"´\",\n micro: \"µ\",\n para: \"¶\",\n middot: \"·\",\n cedil: \"¸\",\n sup1: \"¹\",\n ordm: \"º\",\n raquo: \"»\",\n frac14: \"¼\",\n frac12: \"½\",\n frac34: \"¾\",\n iquest: \"¿\",\n times: \"×\",\n divide: \"÷\",\n forall: \"∀\",\n part: \"∂\",\n exist: \"∃\",\n empty: \"∅\",\n nabla: \"∇\",\n isin: \"∈\",\n notin: \"∉\",\n ni: \"∋\",\n prod: \"∏\",\n sum: \"∑\",\n minus: \"−\",\n lowast: \"∗\",\n radic: \"√\",\n prop: \"∝\",\n infin: \"∞\",\n ang: \"∠\",\n and: \"∧\",\n or: \"∨\",\n cap: \"∩\",\n cup: \"∪\",\n 'int': \"∫\",\n there4: \"∴\",\n sim: \"∼\",\n cong: \"≅\",\n asymp: \"≈\",\n ne: \"≠\",\n equiv: \"≡\",\n le: \"≤\",\n ge: \"≥\",\n sub: \"⊂\",\n sup: \"⊃\",\n nsub: \"⊄\",\n sube: \"⊆\",\n supe: \"⊇\",\n oplus: \"⊕\",\n otimes: \"⊗\",\n perp: \"⊥\",\n sdot: \"⋅\",\n Alpha: \"Α\",\n Beta: \"Β\",\n Gamma: \"Γ\",\n Delta: \"Δ\",\n Epsilon: \"Ε\",\n Zeta: \"Ζ\",\n Eta: \"Η\",\n Theta: \"Θ\",\n Iota: \"Ι\",\n Kappa: \"Κ\",\n Lambda: \"Λ\",\n Mu: \"Μ\",\n Nu: \"Ν\",\n Xi: \"Ξ\",\n Omicron: \"Ο\",\n Pi: \"Π\",\n Rho: \"Ρ\",\n Sigma: \"Σ\",\n Tau: \"Τ\",\n Upsilon: \"Υ\",\n Phi: \"Φ\",\n Chi: \"Χ\",\n Psi: \"Ψ\",\n Omega: \"Ω\",\n alpha: \"α\",\n beta: \"β\",\n gamma: \"γ\",\n delta: \"δ\",\n epsilon: \"ε\",\n zeta: \"ζ\",\n eta: \"η\",\n theta: \"θ\",\n iota: \"ι\",\n kappa: \"κ\",\n lambda: \"λ\",\n mu: \"μ\",\n nu: \"ν\",\n xi: \"ξ\",\n omicron: \"ο\",\n pi: \"π\",\n rho: \"ρ\",\n sigmaf: \"ς\",\n sigma: \"σ\",\n tau: \"τ\",\n upsilon: \"υ\",\n phi: \"φ\",\n chi: \"χ\",\n psi: \"ψ\",\n omega: \"ω\",\n thetasym: \"ϑ\",\n upsih: \"ϒ\",\n piv: \"ϖ\",\n OElig: \"Œ\",\n oelig: \"œ\",\n Scaron: \"Š\",\n scaron: \"š\",\n Yuml: \"Ÿ\",\n fnof: \"ƒ\",\n circ: \"ˆ\",\n tilde: \"˜\",\n ensp: \" \",\n emsp: \" \",\n thinsp: \" \",\n zwnj: \"\",\n zwj: \"\",\n lrm: \"\",\n rlm: \"\",\n ndash: \"–\",\n mdash: \"—\",\n lsquo: \"‘\",\n rsquo: \"’\",\n sbquo: \"‚\",\n ldquo: \"“\",\n rdquo: \"”\",\n bdquo: \"„\",\n dagger: \"†\",\n Dagger: \"‡\",\n bull: \"•\",\n hellip: \"…\",\n permil: \"‰\",\n prime: \"′\",\n Prime: \"″\",\n lsaquo: \"‹\",\n rsaquo: \"›\",\n oline: \"‾\",\n euro: \"€\",\n trade: \"™\",\n larr: \"←\",\n uarr: \"↑\",\n rarr: \"→\",\n darr: \"↓\",\n harr: \"↔\",\n crarr: \"↵\",\n lceil: \"⌈\",\n rceil: \"⌉\",\n lfloor: \"⌊\",\n rfloor: \"⌋\",\n loz: \"◊\",\n spades: \"♠\",\n clubs: \"♣\",\n hearts: \"♥\",\n diams: \"♦\"\n });\n\n /**\n * @deprecated use `HTML_ENTITIES` instead\n * @see HTML_ENTITIES\n */\n exports.entityMap = exports.HTML_ENTITIES;\n });\n entities.XML_ENTITIES;\n entities.HTML_ENTITIES;\n entities.entityMap;\n\n var NAMESPACE$1 = conventions.NAMESPACE;\n\n //[4] \tNameStartChar\t ::= \t\":\" | [A-Z] | \"_\" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]\n //[4a] \tNameChar\t ::= \tNameStartChar | \"-\" | \".\" | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]\n //[5] \tName\t ::= \tNameStartChar (NameChar)*\n var nameStartChar = /[A-Z_a-z\\xC0-\\xD6\\xD8-\\xF6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD]/; //\\u10000-\\uEFFFF\n var nameChar = new RegExp(\"[\\\\-\\\\.0-9\" + nameStartChar.source.slice(1, -1) + \"\\\\u00B7\\\\u0300-\\\\u036F\\\\u203F-\\\\u2040]\");\n var tagNamePattern = new RegExp('^' + nameStartChar.source + nameChar.source + '*(?:\\:' + nameStartChar.source + nameChar.source + '*)?$');\n //var tagNamePattern = /^[a-zA-Z_][\\w\\-\\.]*(?:\\:[a-zA-Z_][\\w\\-\\.]*)?$/\n //var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')\n\n //S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n //S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\n var S_TAG = 0; //tag name offerring\n var S_ATTR = 1; //attr name offerring\n var S_ATTR_SPACE = 2; //attr name end and space offer\n var S_EQ = 3; //=space?\n var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)\n var S_ATTR_END = 5; //attr value end and no space(quot end)\n var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)\n var S_TAG_CLOSE = 7; //closed el<el />\n\n /**\n * Creates an error that will not be caught by XMLReader aka the SAX parser.\n *\n * @param {string} message\n * @param {any?} locator Optional, can provide details about the location in the source\n * @constructor\n */\n function ParseError$1(message, locator) {\n this.message = message;\n this.locator = locator;\n if (Error.captureStackTrace) Error.captureStackTrace(this, ParseError$1);\n }\n ParseError$1.prototype = new Error();\n ParseError$1.prototype.name = ParseError$1.name;\n function XMLReader$1() {}\n XMLReader$1.prototype = {\n parse: function (source, defaultNSMap, entityMap) {\n var domBuilder = this.domBuilder;\n domBuilder.startDocument();\n _copy(defaultNSMap, defaultNSMap = {});\n parse$1(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);\n domBuilder.endDocument();\n }\n };\n function parse$1(source, defaultNSMapCopy, entityMap, domBuilder, errorHandler) {\n function fixedFromCharCode(code) {\n // String.prototype.fromCharCode does not supports\n // > 2 bytes unicode chars directly\n if (code > 0xffff) {\n code -= 0x10000;\n var surrogate1 = 0xd800 + (code >> 10),\n surrogate2 = 0xdc00 + (code & 0x3ff);\n return String.fromCharCode(surrogate1, surrogate2);\n } else {\n return String.fromCharCode(code);\n }\n }\n function entityReplacer(a) {\n var k = a.slice(1, -1);\n if (Object.hasOwnProperty.call(entityMap, k)) {\n return entityMap[k];\n } else if (k.charAt(0) === '#') {\n return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));\n } else {\n errorHandler.error('entity not found:' + a);\n return a;\n }\n }\n function appendText(end) {\n //has some bugs\n if (end > start) {\n var xt = source.substring(start, end).replace(/&#?\\w+;/g, entityReplacer);\n locator && position(start);\n domBuilder.characters(xt, 0, end - start);\n start = end;\n }\n }\n function position(p, m) {\n while (p >= lineEnd && (m = linePattern.exec(source))) {\n lineStart = m.index;\n lineEnd = lineStart + m[0].length;\n locator.lineNumber++;\n //console.log('line++:',locator,startPos,endPos)\n }\n\n locator.columnNumber = p - lineStart + 1;\n }\n var lineStart = 0;\n var lineEnd = 0;\n var linePattern = /.*(?:\\r\\n?|\\n)|.*$/g;\n var locator = domBuilder.locator;\n var parseStack = [{\n currentNSMap: defaultNSMapCopy\n }];\n var closeMap = {};\n var start = 0;\n while (true) {\n try {\n var tagStart = source.indexOf('<', start);\n if (tagStart < 0) {\n if (!source.substr(start).match(/^\\s*$/)) {\n var doc = domBuilder.doc;\n var text = doc.createTextNode(source.substr(start));\n doc.appendChild(text);\n domBuilder.currentElement = text;\n }\n return;\n }\n if (tagStart > start) {\n appendText(tagStart);\n }\n switch (source.charAt(tagStart + 1)) {\n case '/':\n var end = source.indexOf('>', tagStart + 3);\n var tagName = source.substring(tagStart + 2, end).replace(/[ \\t\\n\\r]+$/g, '');\n var config = parseStack.pop();\n if (end < 0) {\n tagName = source.substring(tagStart + 2).replace(/[\\s<].*/, '');\n errorHandler.error(\"end tag name: \" + tagName + ' is not complete:' + config.tagName);\n end = tagStart + 1 + tagName.length;\n } else if (tagName.match(/\\s</)) {\n tagName = tagName.replace(/[\\s<].*/, '');\n errorHandler.error(\"end tag name: \" + tagName + ' maybe not complete');\n end = tagStart + 1 + tagName.length;\n }\n var localNSMap = config.localNSMap;\n var endMatch = config.tagName == tagName;\n var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();\n if (endIgnoreCaseMach) {\n domBuilder.endElement(config.uri, config.localName, tagName);\n if (localNSMap) {\n for (var prefix in localNSMap) {\n if (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {\n domBuilder.endPrefixMapping(prefix);\n }\n }\n }\n if (!endMatch) {\n errorHandler.fatalError(\"end tag name: \" + tagName + ' is not match the current start tagName:' + config.tagName); // No known test case\n }\n } else {\n parseStack.push(config);\n }\n end++;\n break;\n // end elment\n case '?':\n // <?...?>\n locator && position(tagStart);\n end = parseInstruction(source, tagStart, domBuilder);\n break;\n case '!':\n // <!doctype,<![CDATA,<!--\n locator && position(tagStart);\n end = parseDCC(source, tagStart, domBuilder, errorHandler);\n break;\n default:\n locator && position(tagStart);\n var el = new ElementAttributes();\n var currentNSMap = parseStack[parseStack.length - 1].currentNSMap;\n //elStartEnd\n var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);\n var len = el.length;\n if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {\n el.closed = true;\n if (!entityMap.nbsp) {\n errorHandler.warning('unclosed xml attribute');\n }\n }\n if (locator && len) {\n var locator2 = copyLocator(locator, {});\n //try{//attribute position fixed\n for (var i = 0; i < len; i++) {\n var a = el[i];\n position(a.offset);\n a.locator = copyLocator(locator, {});\n }\n domBuilder.locator = locator2;\n if (appendElement$1(el, domBuilder, currentNSMap)) {\n parseStack.push(el);\n }\n domBuilder.locator = locator;\n } else {\n if (appendElement$1(el, domBuilder, currentNSMap)) {\n parseStack.push(el);\n }\n }\n if (NAMESPACE$1.isHTML(el.uri) && !el.closed) {\n end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);\n } else {\n end++;\n }\n }\n } catch (e) {\n if (e instanceof ParseError$1) {\n throw e;\n }\n errorHandler.error('element parse error: ' + e);\n end = -1;\n }\n if (end > start) {\n start = end;\n } else {\n //TODO: 这里有可能sax回退，有位置错误风险\n appendText(Math.max(tagStart, start) + 1);\n }\n }\n }\n function copyLocator(f, t) {\n t.lineNumber = f.lineNumber;\n t.columnNumber = f.columnNumber;\n return t;\n }\n\n /**\n * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);\n * @return end of the elementStartPart(end of elementEndPart for selfClosed el)\n */\n function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {\n /**\n * @param {string} qname\n * @param {string} value\n * @param {number} startIndex\n */\n function addAttribute(qname, value, startIndex) {\n if (el.attributeNames.hasOwnProperty(qname)) {\n errorHandler.fatalError('Attribute ' + qname + ' redefined');\n }\n el.addValue(qname,\n // @see https://www.w3.org/TR/xml/#AVNormalize\n // since the xmldom sax parser does not \"interpret\" DTD the following is not implemented:\n // - recursive replacement of (DTD) entity references\n // - trimming and collapsing multiple spaces into a single one for attributes that are not of type CDATA\n value.replace(/[\\t\\n\\r]/g, ' ').replace(/&#?\\w+;/g, entityReplacer), startIndex);\n }\n var attrName;\n var value;\n var p = ++start;\n var s = S_TAG; //status\n while (true) {\n var c = source.charAt(p);\n switch (c) {\n case '=':\n if (s === S_ATTR) {\n //attrName\n attrName = source.slice(start, p);\n s = S_EQ;\n } else if (s === S_ATTR_SPACE) {\n s = S_EQ;\n } else {\n //fatalError: equal must after attrName or space after attrName\n throw new Error('attribute equal must after attrName'); // No known test case\n }\n\n break;\n case '\\'':\n case '\"':\n if (s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE\n ) {\n //equal\n if (s === S_ATTR) {\n errorHandler.warning('attribute value must after \"=\"');\n attrName = source.slice(start, p);\n }\n start = p + 1;\n p = source.indexOf(c, start);\n if (p > 0) {\n value = source.slice(start, p);\n addAttribute(attrName, value, start - 1);\n s = S_ATTR_END;\n } else {\n //fatalError: no end quot match\n throw new Error('attribute value no end \\'' + c + '\\' match');\n }\n } else if (s == S_ATTR_NOQUOT_VALUE) {\n value = source.slice(start, p);\n addAttribute(attrName, value, start);\n errorHandler.warning('attribute \"' + attrName + '\" missed start quot(' + c + ')!!');\n start = p + 1;\n s = S_ATTR_END;\n } else {\n //fatalError: no equal before\n throw new Error('attribute value must after \"=\"'); // No known test case\n }\n\n break;\n case '/':\n switch (s) {\n case S_TAG:\n el.setTagName(source.slice(start, p));\n case S_ATTR_END:\n case S_TAG_SPACE:\n case S_TAG_CLOSE:\n s = S_TAG_CLOSE;\n el.closed = true;\n case S_ATTR_NOQUOT_VALUE:\n case S_ATTR:\n case S_ATTR_SPACE:\n break;\n //case S_EQ:\n default:\n throw new Error(\"attribute invalid close char('/')\");\n // No known test case\n }\n\n break;\n case '':\n //end document\n errorHandler.error('unexpected end of input');\n if (s == S_TAG) {\n el.setTagName(source.slice(start, p));\n }\n return p;\n case '>':\n switch (s) {\n case S_TAG:\n el.setTagName(source.slice(start, p));\n case S_ATTR_END:\n case S_TAG_SPACE:\n case S_TAG_CLOSE:\n break;\n //normal\n case S_ATTR_NOQUOT_VALUE: //Compatible state\n case S_ATTR:\n value = source.slice(start, p);\n if (value.slice(-1) === '/') {\n el.closed = true;\n value = value.slice(0, -1);\n }\n case S_ATTR_SPACE:\n if (s === S_ATTR_SPACE) {\n value = attrName;\n }\n if (s == S_ATTR_NOQUOT_VALUE) {\n errorHandler.warning('attribute \"' + value + '\" missed quot(\")!');\n addAttribute(attrName, value, start);\n } else {\n if (!NAMESPACE$1.isHTML(currentNSMap['']) || !value.match(/^(?:disabled|checked|selected)$/i)) {\n errorHandler.warning('attribute \"' + value + '\" missed value!! \"' + value + '\" instead!!');\n }\n addAttribute(value, value, start);\n }\n break;\n case S_EQ:\n throw new Error('attribute value missed!!');\n }\n //\t\t\tconsole.log(tagName,tagNamePattern,tagNamePattern.test(tagName))\n return p;\n /*xml space '\\x20' | #x9 | #xD | #xA; */\n case '\\u0080':\n c = ' ';\n default:\n if (c <= ' ') {\n //space\n switch (s) {\n case S_TAG:\n el.setTagName(source.slice(start, p)); //tagName\n s = S_TAG_SPACE;\n break;\n case S_ATTR:\n attrName = source.slice(start, p);\n s = S_ATTR_SPACE;\n break;\n case S_ATTR_NOQUOT_VALUE:\n var value = source.slice(start, p);\n errorHandler.warning('attribute \"' + value + '\" missed quot(\")!!');\n addAttribute(attrName, value, start);\n case S_ATTR_END:\n s = S_TAG_SPACE;\n break;\n //case S_TAG_SPACE:\n //case S_EQ:\n //case S_ATTR_SPACE:\n //\tvoid();break;\n //case S_TAG_CLOSE:\n //ignore warning\n }\n } else {\n //not space\n //S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n //S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\n switch (s) {\n //case S_TAG:void();break;\n //case S_ATTR:void();break;\n //case S_ATTR_NOQUOT_VALUE:void();break;\n case S_ATTR_SPACE:\n el.tagName;\n if (!NAMESPACE$1.isHTML(currentNSMap['']) || !attrName.match(/^(?:disabled|checked|selected)$/i)) {\n errorHandler.warning('attribute \"' + attrName + '\" missed value!! \"' + attrName + '\" instead2!!');\n }\n addAttribute(attrName, attrName, start);\n start = p;\n s = S_ATTR;\n break;\n case S_ATTR_END:\n errorHandler.warning('attribute space is required\"' + attrName + '\"!!');\n case S_TAG_SPACE:\n s = S_ATTR;\n start = p;\n break;\n case S_EQ:\n s = S_ATTR_NOQUOT_VALUE;\n start = p;\n break;\n case S_TAG_CLOSE:\n throw new Error(\"elements closed character '/' and '>' must be connected to\");\n }\n }\n } //end outer switch\n //console.log('p++',p)\n p++;\n }\n }\n /**\n * @return true if has new namespace define\n */\n function appendElement$1(el, domBuilder, currentNSMap) {\n var tagName = el.tagName;\n var localNSMap = null;\n //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n var i = el.length;\n while (i--) {\n var a = el[i];\n var qName = a.qName;\n var value = a.value;\n var nsp = qName.indexOf(':');\n if (nsp > 0) {\n var prefix = a.prefix = qName.slice(0, nsp);\n var localName = qName.slice(nsp + 1);\n var nsPrefix = prefix === 'xmlns' && localName;\n } else {\n localName = qName;\n prefix = null;\n nsPrefix = qName === 'xmlns' && '';\n }\n //can not set prefix,because prefix !== ''\n a.localName = localName;\n //prefix == null for no ns prefix attribute\n if (nsPrefix !== false) {\n //hack!!\n if (localNSMap == null) {\n localNSMap = {};\n //console.log(currentNSMap,0)\n _copy(currentNSMap, currentNSMap = {});\n //console.log(currentNSMap,1)\n }\n\n currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;\n a.uri = NAMESPACE$1.XMLNS;\n domBuilder.startPrefixMapping(nsPrefix, value);\n }\n }\n var i = el.length;\n while (i--) {\n a = el[i];\n var prefix = a.prefix;\n if (prefix) {\n //no prefix attribute has no namespace\n if (prefix === 'xml') {\n a.uri = NAMESPACE$1.XML;\n }\n if (prefix !== 'xmlns') {\n a.uri = currentNSMap[prefix || ''];\n\n //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}\n }\n }\n }\n\n var nsp = tagName.indexOf(':');\n if (nsp > 0) {\n prefix = el.prefix = tagName.slice(0, nsp);\n localName = el.localName = tagName.slice(nsp + 1);\n } else {\n prefix = null; //important!!\n localName = el.localName = tagName;\n }\n //no prefix element has default namespace\n var ns = el.uri = currentNSMap[prefix || ''];\n domBuilder.startElement(ns, localName, tagName, el);\n //endPrefixMapping and startPrefixMapping have not any help for dom builder\n //localNSMap = null\n if (el.closed) {\n domBuilder.endElement(ns, localName, tagName);\n if (localNSMap) {\n for (prefix in localNSMap) {\n if (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {\n domBuilder.endPrefixMapping(prefix);\n }\n }\n }\n } else {\n el.currentNSMap = currentNSMap;\n el.localNSMap = localNSMap;\n //parseStack.push(el);\n return true;\n }\n }\n function parseHtmlSpecialContent(source, elStartEnd, tagName, entityReplacer, domBuilder) {\n if (/^(?:script|textarea)$/i.test(tagName)) {\n var elEndStart = source.indexOf('</' + tagName + '>', elStartEnd);\n var text = source.substring(elStartEnd + 1, elEndStart);\n if (/[&<]/.test(text)) {\n if (/^script$/i.test(tagName)) {\n //if(!/\\]\\]>/.test(text)){\n //lexHandler.startCDATA();\n domBuilder.characters(text, 0, text.length);\n //lexHandler.endCDATA();\n return elEndStart;\n //}\n } //}else{//text area\n text = text.replace(/&#?\\w+;/g, entityReplacer);\n domBuilder.characters(text, 0, text.length);\n return elEndStart;\n //}\n }\n }\n\n return elStartEnd + 1;\n }\n function fixSelfClosed(source, elStartEnd, tagName, closeMap) {\n //if(tagName in closeMap){\n var pos = closeMap[tagName];\n if (pos == null) {\n //console.log(tagName)\n pos = source.lastIndexOf('</' + tagName + '>');\n if (pos < elStartEnd) {\n //忘记闭合\n pos = source.lastIndexOf('</' + tagName);\n }\n closeMap[tagName] = pos;\n }\n return pos < elStartEnd;\n //}\n }\n\n function _copy(source, target) {\n for (var n in source) {\n if (Object.prototype.hasOwnProperty.call(source, n)) {\n target[n] = source[n];\n }\n }\n }\n function parseDCC(source, start, domBuilder, errorHandler) {\n //sure start with '<!'\n var next = source.charAt(start + 2);\n switch (next) {\n case '-':\n if (source.charAt(start + 3) === '-') {\n var end = source.indexOf('-->', start + 4);\n //append comment source.substring(4,end)//<!--\n if (end > start) {\n domBuilder.comment(source, start + 4, end - start - 4);\n return end + 3;\n } else {\n errorHandler.error(\"Unclosed comment\");\n return -1;\n }\n } else {\n //error\n return -1;\n }\n default:\n if (source.substr(start + 3, 6) == 'CDATA[') {\n var end = source.indexOf(']]>', start + 9);\n domBuilder.startCDATA();\n domBuilder.characters(source, start + 9, end - start - 9);\n domBuilder.endCDATA();\n return end + 3;\n }\n //<!DOCTYPE\n //startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)\n var matchs = split(source, start);\n var len = matchs.length;\n if (len > 1 && /!doctype/i.test(matchs[0][0])) {\n var name = matchs[1][0];\n var pubid = false;\n var sysid = false;\n if (len > 3) {\n if (/^public$/i.test(matchs[2][0])) {\n pubid = matchs[3][0];\n sysid = len > 4 && matchs[4][0];\n } else if (/^system$/i.test(matchs[2][0])) {\n sysid = matchs[3][0];\n }\n }\n var lastMatch = matchs[len - 1];\n domBuilder.startDTD(name, pubid, sysid);\n domBuilder.endDTD();\n return lastMatch.index + lastMatch[0].length;\n }\n }\n return -1;\n }\n function parseInstruction(source, start, domBuilder) {\n var end = source.indexOf('?>', start);\n if (end) {\n var match = source.substring(start, end).match(/^<\\?(\\S*)\\s*([\\s\\S]*?)\\s*$/);\n if (match) {\n match[0].length;\n domBuilder.processingInstruction(match[1], match[2]);\n return end + 2;\n } else {\n //error\n return -1;\n }\n }\n return -1;\n }\n function ElementAttributes() {\n this.attributeNames = {};\n }\n ElementAttributes.prototype = {\n setTagName: function (tagName) {\n if (!tagNamePattern.test(tagName)) {\n throw new Error('invalid tagName:' + tagName);\n }\n this.tagName = tagName;\n },\n addValue: function (qName, value, offset) {\n if (!tagNamePattern.test(qName)) {\n throw new Error('invalid attribute:' + qName);\n }\n this.attributeNames[qName] = this.length;\n this[this.length++] = {\n qName: qName,\n value: value,\n offset: offset\n };\n },\n length: 0,\n getLocalName: function (i) {\n return this[i].localName;\n },\n getLocator: function (i) {\n return this[i].locator;\n },\n getQName: function (i) {\n return this[i].qName;\n },\n getURI: function (i) {\n return this[i].uri;\n },\n getValue: function (i) {\n return this[i].value;\n }\n //\t,getIndex:function(uri, localName)){\n //\t\tif(localName){\n //\n //\t\t}else{\n //\t\t\tvar qName = uri\n //\t\t}\n //\t},\n //\tgetValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},\n //\tgetType:function(uri,localName){}\n //\tgetType:function(i){},\n };\n\n function split(source, start) {\n var match;\n var buf = [];\n var reg = /'[^']+'|\"[^\"]+\"|[^\\s<>\\/=]+=?|(\\/?\\s*>|<)/g;\n reg.lastIndex = start;\n reg.exec(source); //skip <\n while (match = reg.exec(source)) {\n buf.push(match);\n if (match[1]) return buf;\n }\n }\n var XMLReader_1 = XMLReader$1;\n var ParseError_1 = ParseError$1;\n var sax = {\n XMLReader: XMLReader_1,\n ParseError: ParseError_1\n };\n\n var DOMImplementation = dom.DOMImplementation;\n var NAMESPACE = conventions.NAMESPACE;\n var ParseError = sax.ParseError;\n var XMLReader = sax.XMLReader;\n\n /**\n * Normalizes line ending according to https://www.w3.org/TR/xml11/#sec-line-ends:\n *\n * > XML parsed entities are often stored in computer files which,\n * > for editing convenience, are organized into lines.\n * > These lines are typically separated by some combination\n * > of the characters CARRIAGE RETURN (#xD) and LINE FEED (#xA).\n * >\n * > To simplify the tasks of applications, the XML processor must behave\n * > as if it normalized all line breaks in external parsed entities (including the document entity)\n * > on input, before parsing, by translating all of the following to a single #xA character:\n * >\n * > 1. the two-character sequence #xD #xA\n * > 2. the two-character sequence #xD #x85\n * > 3. the single character #x85\n * > 4. the single character #x2028\n * > 5. any #xD character that is not immediately followed by #xA or #x85.\n *\n * @param {string} input\n * @returns {string}\n */\n function normalizeLineEndings(input) {\n return input.replace(/\\r[\\n\\u0085]/g, '\\n').replace(/[\\r\\u0085\\u2028]/g, '\\n');\n }\n\n /**\n * @typedef Locator\n * @property {number} [columnNumber]\n * @property {number} [lineNumber]\n */\n\n /**\n * @typedef DOMParserOptions\n * @property {DOMHandler} [domBuilder]\n * @property {Function} [errorHandler]\n * @property {(string) => string} [normalizeLineEndings] used to replace line endings before parsing\n * \t\t\t\t\t\tdefaults to `normalizeLineEndings`\n * @property {Locator} [locator]\n * @property {Record<string, string>} [xmlns]\n *\n * @see normalizeLineEndings\n */\n\n /**\n * The DOMParser interface provides the ability to parse XML or HTML source code\n * from a string into a DOM `Document`.\n *\n * _xmldom is different from the spec in that it allows an `options` parameter,\n * to override the default behavior._\n *\n * @param {DOMParserOptions} [options]\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-parsing-and-serialization\n */\n function DOMParser$1(options) {\n this.options = options || {\n locator: {}\n };\n }\n DOMParser$1.prototype.parseFromString = function (source, mimeType) {\n var options = this.options;\n var sax = new XMLReader();\n var domBuilder = options.domBuilder || new DOMHandler(); //contentHandler and LexicalHandler\n var errorHandler = options.errorHandler;\n var locator = options.locator;\n var defaultNSMap = options.xmlns || {};\n var isHTML = /\\/x?html?$/.test(mimeType); //mimeType.toLowerCase().indexOf('html') > -1;\n var entityMap = isHTML ? entities.HTML_ENTITIES : entities.XML_ENTITIES;\n if (locator) {\n domBuilder.setDocumentLocator(locator);\n }\n sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);\n sax.domBuilder = options.domBuilder || domBuilder;\n if (isHTML) {\n defaultNSMap[''] = NAMESPACE.HTML;\n }\n defaultNSMap.xml = defaultNSMap.xml || NAMESPACE.XML;\n var normalize = options.normalizeLineEndings || normalizeLineEndings;\n if (source && typeof source === 'string') {\n sax.parse(normalize(source), defaultNSMap, entityMap);\n } else {\n sax.errorHandler.error('invalid doc source');\n }\n return domBuilder.doc;\n };\n function buildErrorHandler(errorImpl, domBuilder, locator) {\n if (!errorImpl) {\n if (domBuilder instanceof DOMHandler) {\n return domBuilder;\n }\n errorImpl = domBuilder;\n }\n var errorHandler = {};\n var isCallback = errorImpl instanceof Function;\n locator = locator || {};\n function build(key) {\n var fn = errorImpl[key];\n if (!fn && isCallback) {\n fn = errorImpl.length == 2 ? function (msg) {\n errorImpl(key, msg);\n } : errorImpl;\n }\n errorHandler[key] = fn && function (msg) {\n fn('[xmldom ' + key + ']\\t' + msg + _locator(locator));\n } || function () {};\n }\n build('warning');\n build('error');\n build('fatalError');\n return errorHandler;\n }\n\n //console.log('#\\n\\n\\n\\n\\n\\n\\n####')\n /**\n * +ContentHandler+ErrorHandler\n * +LexicalHandler+EntityResolver2\n * -DeclHandler-DTDHandler\n *\n * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler\n * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2\n * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html\n */\n function DOMHandler() {\n this.cdata = false;\n }\n function position(locator, node) {\n node.lineNumber = locator.lineNumber;\n node.columnNumber = locator.columnNumber;\n }\n /**\n * @see org.xml.sax.ContentHandler#startDocument\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html\n */\n DOMHandler.prototype = {\n startDocument: function () {\n this.doc = new DOMImplementation().createDocument(null, null, null);\n if (this.locator) {\n this.doc.documentURI = this.locator.systemId;\n }\n },\n startElement: function (namespaceURI, localName, qName, attrs) {\n var doc = this.doc;\n var el = doc.createElementNS(namespaceURI, qName || localName);\n var len = attrs.length;\n appendElement(this, el);\n this.currentElement = el;\n this.locator && position(this.locator, el);\n for (var i = 0; i < len; i++) {\n var namespaceURI = attrs.getURI(i);\n var value = attrs.getValue(i);\n var qName = attrs.getQName(i);\n var attr = doc.createAttributeNS(namespaceURI, qName);\n this.locator && position(attrs.getLocator(i), attr);\n attr.value = attr.nodeValue = value;\n el.setAttributeNode(attr);\n }\n },\n endElement: function (namespaceURI, localName, qName) {\n var current = this.currentElement;\n current.tagName;\n this.currentElement = current.parentNode;\n },\n startPrefixMapping: function (prefix, uri) {},\n endPrefixMapping: function (prefix) {},\n processingInstruction: function (target, data) {\n var ins = this.doc.createProcessingInstruction(target, data);\n this.locator && position(this.locator, ins);\n appendElement(this, ins);\n },\n ignorableWhitespace: function (ch, start, length) {},\n characters: function (chars, start, length) {\n chars = _toString.apply(this, arguments);\n //console.log(chars)\n if (chars) {\n if (this.cdata) {\n var charNode = this.doc.createCDATASection(chars);\n } else {\n var charNode = this.doc.createTextNode(chars);\n }\n if (this.currentElement) {\n this.currentElement.appendChild(charNode);\n } else if (/^\\s*$/.test(chars)) {\n this.doc.appendChild(charNode);\n //process xml\n }\n\n this.locator && position(this.locator, charNode);\n }\n },\n skippedEntity: function (name) {},\n endDocument: function () {\n this.doc.normalize();\n },\n setDocumentLocator: function (locator) {\n if (this.locator = locator) {\n // && !('lineNumber' in locator)){\n locator.lineNumber = 0;\n }\n },\n //LexicalHandler\n comment: function (chars, start, length) {\n chars = _toString.apply(this, arguments);\n var comm = this.doc.createComment(chars);\n this.locator && position(this.locator, comm);\n appendElement(this, comm);\n },\n startCDATA: function () {\n //used in characters() methods\n this.cdata = true;\n },\n endCDATA: function () {\n this.cdata = false;\n },\n startDTD: function (name, publicId, systemId) {\n var impl = this.doc.implementation;\n if (impl && impl.createDocumentType) {\n var dt = impl.createDocumentType(name, publicId, systemId);\n this.locator && position(this.locator, dt);\n appendElement(this, dt);\n this.doc.doctype = dt;\n }\n },\n /**\n * @see org.xml.sax.ErrorHandler\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html\n */\n warning: function (error) {\n console.warn('[xmldom warning]\\t' + error, _locator(this.locator));\n },\n error: function (error) {\n console.error('[xmldom error]\\t' + error, _locator(this.locator));\n },\n fatalError: function (error) {\n throw new ParseError(error, this.locator);\n }\n };\n function _locator(l) {\n if (l) {\n return '\\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';\n }\n }\n function _toString(chars, start, length) {\n if (typeof chars == 'string') {\n return chars.substr(start, length);\n } else {\n //java sax connect width xmldom on rhino(what about: \"? && !(chars instanceof String)\")\n if (chars.length >= start + length || start) {\n return new java.lang.String(chars, start, length) + '';\n }\n return chars;\n }\n }\n\n /*\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html\n * used method of org.xml.sax.ext.LexicalHandler:\n * #comment(chars, start, length)\n * #startCDATA()\n * #endCDATA()\n * #startDTD(name, publicId, systemId)\n *\n *\n * IGNORED method of org.xml.sax.ext.LexicalHandler:\n * #endDTD()\n * #startEntity(name)\n * #endEntity(name)\n *\n *\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html\n * IGNORED method of org.xml.sax.ext.DeclHandler\n * \t#attributeDecl(eName, aName, type, mode, value)\n * #elementDecl(name, model)\n * #externalEntityDecl(name, publicId, systemId)\n * #internalEntityDecl(name, value)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html\n * IGNORED method of org.xml.sax.EntityResolver2\n * #resolveEntity(String name,String publicId,String baseURI,String systemId)\n * #resolveEntity(publicId, systemId)\n * #getExternalSubset(name, baseURI)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html\n * IGNORED method of org.xml.sax.DTDHandler\n * #notationDecl(name, publicId, systemId) {};\n * #unparsedEntityDecl(name, publicId, systemId, notationName) {};\n */\n \"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl\".replace(/\\w+/g, function (key) {\n DOMHandler.prototype[key] = function () {\n return null;\n };\n });\n\n /* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */\n function appendElement(hander, node) {\n if (!hander.currentElement) {\n hander.doc.appendChild(node);\n } else {\n hander.currentElement.appendChild(node);\n }\n } //appendChild and setAttributeNS are preformance key\n\n var __DOMHandler = DOMHandler;\n var normalizeLineEndings_1 = normalizeLineEndings;\n var DOMParser_1 = DOMParser$1;\n var domParser = {\n __DOMHandler: __DOMHandler,\n normalizeLineEndings: normalizeLineEndings_1,\n DOMParser: DOMParser_1\n };\n\n var DOMParser = domParser.DOMParser;\n\n /*! @name mpd-parser @version 1.0.1 @license Apache-2.0 */\n const isObject = obj => {\n return !!obj && typeof obj === 'object';\n };\n const merge$1 = (...objects) => {\n return objects.reduce((result, source) => {\n if (typeof source !== 'object') {\n return result;\n }\n Object.keys(source).forEach(key => {\n if (Array.isArray(result[key]) && Array.isArray(source[key])) {\n result[key] = result[key].concat(source[key]);\n } else if (isObject(result[key]) && isObject(source[key])) {\n result[key] = merge$1(result[key], source[key]);\n } else {\n result[key] = source[key];\n }\n });\n return result;\n }, {});\n };\n const values = o => Object.keys(o).map(k => o[k]);\n const range = (start, end) => {\n const result = [];\n for (let i = start; i < end; i++) {\n result.push(i);\n }\n return result;\n };\n const flatten = lists => lists.reduce((x, y) => x.concat(y), []);\n const from = list => {\n if (!list.length) {\n return [];\n }\n const result = [];\n for (let i = 0; i < list.length; i++) {\n result.push(list[i]);\n }\n return result;\n };\n const findIndexes = (l, key) => l.reduce((a, e, i) => {\n if (e[key]) {\n a.push(i);\n }\n return a;\n }, []);\n /**\n * Returns a union of the included lists provided each element can be identified by a key.\n *\n * @param {Array} list - list of lists to get the union of\n * @param {Function} keyFunction - the function to use as a key for each element\n *\n * @return {Array} the union of the arrays\n */\n\n const union = (lists, keyFunction) => {\n return values(lists.reduce((acc, list) => {\n list.forEach(el => {\n acc[keyFunction(el)] = el;\n });\n return acc;\n }, {}));\n };\n var errors = {\n INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',\n DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',\n DASH_INVALID_XML: 'DASH_INVALID_XML',\n NO_BASE_URL: 'NO_BASE_URL',\n MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',\n SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',\n UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'\n };\n\n /**\n * @typedef {Object} SingleUri\n * @property {string} uri - relative location of segment\n * @property {string} resolvedUri - resolved location of segment\n * @property {Object} byterange - Object containing information on how to make byte range\n * requests following byte-range-spec per RFC2616.\n * @property {String} byterange.length - length of range request\n * @property {String} byterange.offset - byte offset of range request\n *\n * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1\n */\n\n /**\n * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object\n * that conforms to how m3u8-parser is structured\n *\n * @see https://github.com/videojs/m3u8-parser\n *\n * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes\n * @param {string} source - source url for segment\n * @param {string} range - optional range used for range calls,\n * follows RFC 2616, Clause 14.35.1\n * @return {SingleUri} full segment information transformed into a format similar\n * to m3u8-parser\n */\n\n const urlTypeToSegment = ({\n baseUrl = '',\n source = '',\n range = '',\n indexRange = ''\n }) => {\n const segment = {\n uri: source,\n resolvedUri: resolveUrl$1(baseUrl || '', source)\n };\n if (range || indexRange) {\n const rangeStr = range ? range : indexRange;\n const ranges = rangeStr.split('-'); // default to parsing this as a BigInt if possible\n\n let startRange = window.BigInt ? window.BigInt(ranges[0]) : parseInt(ranges[0], 10);\n let endRange = window.BigInt ? window.BigInt(ranges[1]) : parseInt(ranges[1], 10); // convert back to a number if less than MAX_SAFE_INTEGER\n\n if (startRange < Number.MAX_SAFE_INTEGER && typeof startRange === 'bigint') {\n startRange = Number(startRange);\n }\n if (endRange < Number.MAX_SAFE_INTEGER && typeof endRange === 'bigint') {\n endRange = Number(endRange);\n }\n let length;\n if (typeof endRange === 'bigint' || typeof startRange === 'bigint') {\n length = window.BigInt(endRange) - window.BigInt(startRange) + window.BigInt(1);\n } else {\n length = endRange - startRange + 1;\n }\n if (typeof length === 'bigint' && length < Number.MAX_SAFE_INTEGER) {\n length = Number(length);\n } // byterange should be inclusive according to\n // RFC 2616, Clause 14.35.1\n\n segment.byterange = {\n length,\n offset: startRange\n };\n }\n return segment;\n };\n const byteRangeToString = byterange => {\n // `endRange` is one less than `offset + length` because the HTTP range\n // header uses inclusive ranges\n let endRange;\n if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n endRange = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);\n } else {\n endRange = byterange.offset + byterange.length - 1;\n }\n return `${byterange.offset}-${endRange}`;\n };\n\n /**\n * parse the end number attribue that can be a string\n * number, or undefined.\n *\n * @param {string|number|undefined} endNumber\n * The end number attribute.\n *\n * @return {number|null}\n * The result of parsing the end number.\n */\n\n const parseEndNumber = endNumber => {\n if (endNumber && typeof endNumber !== 'number') {\n endNumber = parseInt(endNumber, 10);\n }\n if (isNaN(endNumber)) {\n return null;\n }\n return endNumber;\n };\n /**\n * Functions for calculating the range of available segments in static and dynamic\n * manifests.\n */\n\n const segmentRange = {\n /**\n * Returns the entire range of available segments for a static MPD\n *\n * @param {Object} attributes\n * Inheritied MPD attributes\n * @return {{ start: number, end: number }}\n * The start and end numbers for available segments\n */\n static(attributes) {\n const {\n duration,\n timescale = 1,\n sourceDuration,\n periodDuration\n } = attributes;\n const endNumber = parseEndNumber(attributes.endNumber);\n const segmentDuration = duration / timescale;\n if (typeof endNumber === 'number') {\n return {\n start: 0,\n end: endNumber\n };\n }\n if (typeof periodDuration === 'number') {\n return {\n start: 0,\n end: periodDuration / segmentDuration\n };\n }\n return {\n start: 0,\n end: sourceDuration / segmentDuration\n };\n },\n /**\n * Returns the current live window range of available segments for a dynamic MPD\n *\n * @param {Object} attributes\n * Inheritied MPD attributes\n * @return {{ start: number, end: number }}\n * The start and end numbers for available segments\n */\n dynamic(attributes) {\n const {\n NOW,\n clientOffset,\n availabilityStartTime,\n timescale = 1,\n duration,\n periodStart = 0,\n minimumUpdatePeriod = 0,\n timeShiftBufferDepth = Infinity\n } = attributes;\n const endNumber = parseEndNumber(attributes.endNumber); // clientOffset is passed in at the top level of mpd-parser and is an offset calculated\n // after retrieving UTC server time.\n\n const now = (NOW + clientOffset) / 1000; // WC stands for Wall Clock.\n // Convert the period start time to EPOCH.\n\n const periodStartWC = availabilityStartTime + periodStart; // Period end in EPOCH is manifest's retrieval time + time until next update.\n\n const periodEndWC = now + minimumUpdatePeriod;\n const periodDuration = periodEndWC - periodStartWC;\n const segmentCount = Math.ceil(periodDuration * timescale / duration);\n const availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);\n const availableEnd = Math.floor((now - periodStartWC) * timescale / duration);\n return {\n start: Math.max(0, availableStart),\n end: typeof endNumber === 'number' ? endNumber : Math.min(segmentCount, availableEnd)\n };\n }\n };\n /**\n * Maps a range of numbers to objects with information needed to build the corresponding\n * segment list\n *\n * @name toSegmentsCallback\n * @function\n * @param {number} number\n * Number of the segment\n * @param {number} index\n * Index of the number in the range list\n * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}\n * Object with segment timing and duration info\n */\n\n /**\n * Returns a callback for Array.prototype.map for mapping a range of numbers to\n * information needed to build the segment list.\n *\n * @param {Object} attributes\n * Inherited MPD attributes\n * @return {toSegmentsCallback}\n * Callback map function\n */\n\n const toSegments = attributes => number => {\n const {\n duration,\n timescale = 1,\n periodStart,\n startNumber = 1\n } = attributes;\n return {\n number: startNumber + number,\n duration: duration / timescale,\n timeline: periodStart,\n time: number * duration\n };\n };\n /**\n * Returns a list of objects containing segment timing and duration info used for\n * building the list of segments. This uses the @duration attribute specified\n * in the MPD manifest to derive the range of segments.\n *\n * @param {Object} attributes\n * Inherited MPD attributes\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n * List of Objects with segment timing and duration info\n */\n\n const parseByDuration = attributes => {\n const {\n type,\n duration,\n timescale = 1,\n periodDuration,\n sourceDuration\n } = attributes;\n const {\n start,\n end\n } = segmentRange[type](attributes);\n const segments = range(start, end).map(toSegments(attributes));\n if (type === 'static') {\n const index = segments.length - 1; // section is either a period or the full source\n\n const sectionDuration = typeof periodDuration === 'number' ? periodDuration : sourceDuration; // final segment may be less than full segment duration\n\n segments[index].duration = sectionDuration - duration / timescale * index;\n }\n return segments;\n };\n\n /**\n * Translates SegmentBase into a set of segments.\n * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes. Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @return {Object.<Array>} list of segments\n */\n\n const segmentsFromBase = attributes => {\n const {\n baseUrl,\n initialization = {},\n sourceDuration,\n indexRange = '',\n periodStart,\n presentationTime,\n number = 0,\n duration\n } = attributes; // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)\n\n if (!baseUrl) {\n throw new Error(errors.NO_BASE_URL);\n }\n const initSegment = urlTypeToSegment({\n baseUrl,\n source: initialization.sourceURL,\n range: initialization.range\n });\n const segment = urlTypeToSegment({\n baseUrl,\n source: baseUrl,\n indexRange\n });\n segment.map = initSegment; // If there is a duration, use it, otherwise use the given duration of the source\n // (since SegmentBase is only for one total segment)\n\n if (duration) {\n const segmentTimeInfo = parseByDuration(attributes);\n if (segmentTimeInfo.length) {\n segment.duration = segmentTimeInfo[0].duration;\n segment.timeline = segmentTimeInfo[0].timeline;\n }\n } else if (sourceDuration) {\n segment.duration = sourceDuration;\n segment.timeline = periodStart;\n } // If presentation time is provided, these segments are being generated by SIDX\n // references, and should use the time provided. For the general case of SegmentBase,\n // there should only be one segment in the period, so its presentation time is the same\n // as its period start.\n\n segment.presentationTime = presentationTime || periodStart;\n segment.number = number;\n return [segment];\n };\n /**\n * Given a playlist, a sidx box, and a baseUrl, update the segment list of the playlist\n * according to the sidx information given.\n *\n * playlist.sidx has metadadata about the sidx where-as the sidx param\n * is the parsed sidx box itself.\n *\n * @param {Object} playlist the playlist to update the sidx information for\n * @param {Object} sidx the parsed sidx box\n * @return {Object} the playlist object with the updated sidx information\n */\n\n const addSidxSegmentsToPlaylist$1 = (playlist, sidx, baseUrl) => {\n // Retain init segment information\n const initSegment = playlist.sidx.map ? playlist.sidx.map : null; // Retain source duration from initial main manifest parsing\n\n const sourceDuration = playlist.sidx.duration; // Retain source timeline\n\n const timeline = playlist.timeline || 0;\n const sidxByteRange = playlist.sidx.byterange;\n const sidxEnd = sidxByteRange.offset + sidxByteRange.length; // Retain timescale of the parsed sidx\n\n const timescale = sidx.timescale; // referenceType 1 refers to other sidx boxes\n\n const mediaReferences = sidx.references.filter(r => r.referenceType !== 1);\n const segments = [];\n const type = playlist.endList ? 'static' : 'dynamic';\n const periodStart = playlist.sidx.timeline;\n let presentationTime = periodStart;\n let number = playlist.mediaSequence || 0; // firstOffset is the offset from the end of the sidx box\n\n let startIndex; // eslint-disable-next-line\n\n if (typeof sidx.firstOffset === 'bigint') {\n startIndex = window.BigInt(sidxEnd) + sidx.firstOffset;\n } else {\n startIndex = sidxEnd + sidx.firstOffset;\n }\n for (let i = 0; i < mediaReferences.length; i++) {\n const reference = sidx.references[i]; // size of the referenced (sub)segment\n\n const size = reference.referencedSize; // duration of the referenced (sub)segment, in the timescale\n // this will be converted to seconds when generating segments\n\n const duration = reference.subsegmentDuration; // should be an inclusive range\n\n let endIndex; // eslint-disable-next-line\n\n if (typeof startIndex === 'bigint') {\n endIndex = startIndex + window.BigInt(size) - window.BigInt(1);\n } else {\n endIndex = startIndex + size - 1;\n }\n const indexRange = `${startIndex}-${endIndex}`;\n const attributes = {\n baseUrl,\n timescale,\n timeline,\n periodStart,\n presentationTime,\n number,\n duration,\n sourceDuration,\n indexRange,\n type\n };\n const segment = segmentsFromBase(attributes)[0];\n if (initSegment) {\n segment.map = initSegment;\n }\n segments.push(segment);\n if (typeof startIndex === 'bigint') {\n startIndex += window.BigInt(size);\n } else {\n startIndex += size;\n }\n presentationTime += duration / timescale;\n number++;\n }\n playlist.segments = segments;\n return playlist;\n };\n const SUPPORTED_MEDIA_TYPES = ['AUDIO', 'SUBTITLES']; // allow one 60fps frame as leniency (arbitrarily chosen)\n\n const TIME_FUDGE = 1 / 60;\n /**\n * Given a list of timelineStarts, combines, dedupes, and sorts them.\n *\n * @param {TimelineStart[]} timelineStarts - list of timeline starts\n *\n * @return {TimelineStart[]} the combined and deduped timeline starts\n */\n\n const getUniqueTimelineStarts = timelineStarts => {\n return union(timelineStarts, ({\n timeline\n }) => timeline).sort((a, b) => a.timeline > b.timeline ? 1 : -1);\n };\n /**\n * Finds the playlist with the matching NAME attribute.\n *\n * @param {Array} playlists - playlists to search through\n * @param {string} name - the NAME attribute to search for\n *\n * @return {Object|null} the matching playlist object, or null\n */\n\n const findPlaylistWithName = (playlists, name) => {\n for (let i = 0; i < playlists.length; i++) {\n if (playlists[i].attributes.NAME === name) {\n return playlists[i];\n }\n }\n return null;\n };\n /**\n * Gets a flattened array of media group playlists.\n *\n * @param {Object} manifest - the main manifest object\n *\n * @return {Array} the media group playlists\n */\n\n const getMediaGroupPlaylists = manifest => {\n let mediaGroupPlaylists = [];\n forEachMediaGroup$1(manifest, SUPPORTED_MEDIA_TYPES, (properties, type, group, label) => {\n mediaGroupPlaylists = mediaGroupPlaylists.concat(properties.playlists || []);\n });\n return mediaGroupPlaylists;\n };\n /**\n * Updates the playlist's media sequence numbers.\n *\n * @param {Object} config - options object\n * @param {Object} config.playlist - the playlist to update\n * @param {number} config.mediaSequence - the mediaSequence number to start with\n */\n\n const updateMediaSequenceForPlaylist = ({\n playlist,\n mediaSequence\n }) => {\n playlist.mediaSequence = mediaSequence;\n playlist.segments.forEach((segment, index) => {\n segment.number = playlist.mediaSequence + index;\n });\n };\n /**\n * Updates the media and discontinuity sequence numbers of newPlaylists given oldPlaylists\n * and a complete list of timeline starts.\n *\n * If no matching playlist is found, only the discontinuity sequence number of the playlist\n * will be updated.\n *\n * Since early available timelines are not supported, at least one segment must be present.\n *\n * @param {Object} config - options object\n * @param {Object[]} oldPlaylists - the old playlists to use as a reference\n * @param {Object[]} newPlaylists - the new playlists to update\n * @param {Object} timelineStarts - all timelineStarts seen in the stream to this point\n */\n\n const updateSequenceNumbers = ({\n oldPlaylists,\n newPlaylists,\n timelineStarts\n }) => {\n newPlaylists.forEach(playlist => {\n playlist.discontinuitySequence = timelineStarts.findIndex(function ({\n timeline\n }) {\n return timeline === playlist.timeline;\n }); // Playlists NAMEs come from DASH Representation IDs, which are mandatory\n // (see ISO_23009-1-2012 5.3.5.2).\n //\n // If the same Representation existed in a prior Period, it will retain the same NAME.\n\n const oldPlaylist = findPlaylistWithName(oldPlaylists, playlist.attributes.NAME);\n if (!oldPlaylist) {\n // Since this is a new playlist, the media sequence values can start from 0 without\n // consequence.\n return;\n } // TODO better support for live SIDX\n //\n // As of this writing, mpd-parser does not support multiperiod SIDX (in live or VOD).\n // This is evident by a playlist only having a single SIDX reference. In a multiperiod\n // playlist there would need to be multiple SIDX references. In addition, live SIDX is\n // not supported when the SIDX properties change on refreshes.\n //\n // In the future, if support needs to be added, the merging logic here can be called\n // after SIDX references are resolved. For now, exit early to prevent exceptions being\n // thrown due to undefined references.\n\n if (playlist.sidx) {\n return;\n } // Since we don't yet support early available timelines, we don't need to support\n // playlists with no segments.\n\n const firstNewSegment = playlist.segments[0];\n const oldMatchingSegmentIndex = oldPlaylist.segments.findIndex(function (oldSegment) {\n return Math.abs(oldSegment.presentationTime - firstNewSegment.presentationTime) < TIME_FUDGE;\n }); // No matching segment from the old playlist means the entire playlist was refreshed.\n // In this case the media sequence should account for this update, and the new segments\n // should be marked as discontinuous from the prior content, since the last prior\n // timeline was removed.\n\n if (oldMatchingSegmentIndex === -1) {\n updateMediaSequenceForPlaylist({\n playlist,\n mediaSequence: oldPlaylist.mediaSequence + oldPlaylist.segments.length\n });\n playlist.segments[0].discontinuity = true;\n playlist.discontinuityStarts.unshift(0); // No matching segment does not necessarily mean there's missing content.\n //\n // If the new playlist's timeline is the same as the last seen segment's timeline,\n // then a discontinuity can be added to identify that there's potentially missing\n // content. If there's no missing content, the discontinuity should still be rather\n // harmless. It's possible that if segment durations are accurate enough, that the\n // existence of a gap can be determined using the presentation times and durations,\n // but if the segment timing info is off, it may introduce more problems than simply\n // adding the discontinuity.\n //\n // If the new playlist's timeline is different from the last seen segment's timeline,\n // then a discontinuity can be added to identify that this is the first seen segment\n // of a new timeline. However, the logic at the start of this function that\n // determined the disconinuity sequence by timeline index is now off by one (the\n // discontinuity of the newest timeline hasn't yet fallen off the manifest...since\n // we added it), so the disconinuity sequence must be decremented.\n //\n // A period may also have a duration of zero, so the case of no segments is handled\n // here even though we don't yet support early available periods.\n\n if (!oldPlaylist.segments.length && playlist.timeline > oldPlaylist.timeline || oldPlaylist.segments.length && playlist.timeline > oldPlaylist.segments[oldPlaylist.segments.length - 1].timeline) {\n playlist.discontinuitySequence--;\n }\n return;\n } // If the first segment matched with a prior segment on a discontinuity (it's matching\n // on the first segment of a period), then the discontinuitySequence shouldn't be the\n // timeline's matching one, but instead should be the one prior, and the first segment\n // of the new manifest should be marked with a discontinuity.\n //\n // The reason for this special case is that discontinuity sequence shows how many\n // discontinuities have fallen off of the playlist, and discontinuities are marked on\n // the first segment of a new \"timeline.\" Because of this, while DASH will retain that\n // Period while the \"timeline\" exists, HLS keeps track of it via the discontinuity\n // sequence, and that first segment is an indicator, but can be removed before that\n // timeline is gone.\n\n const oldMatchingSegment = oldPlaylist.segments[oldMatchingSegmentIndex];\n if (oldMatchingSegment.discontinuity && !firstNewSegment.discontinuity) {\n firstNewSegment.discontinuity = true;\n playlist.discontinuityStarts.unshift(0);\n playlist.discontinuitySequence--;\n }\n updateMediaSequenceForPlaylist({\n playlist,\n mediaSequence: oldPlaylist.segments[oldMatchingSegmentIndex].number\n });\n });\n };\n /**\n * Given an old parsed manifest object and a new parsed manifest object, updates the\n * sequence and timing values within the new manifest to ensure that it lines up with the\n * old.\n *\n * @param {Array} oldManifest - the old main manifest object\n * @param {Array} newManifest - the new main manifest object\n *\n * @return {Object} the updated new manifest object\n */\n\n const positionManifestOnTimeline = ({\n oldManifest,\n newManifest\n }) => {\n // Starting from v4.1.2 of the IOP, section 4.4.3.3 states:\n //\n // \"MPD@availabilityStartTime and Period@start shall not be changed over MPD updates.\"\n //\n // This was added from https://github.com/Dash-Industry-Forum/DASH-IF-IOP/issues/160\n //\n // Because of this change, and the difficulty of supporting periods with changing start\n // times, periods with changing start times are not supported. This makes the logic much\n // simpler, since periods with the same start time can be considerred the same period\n // across refreshes.\n //\n // To give an example as to the difficulty of handling periods where the start time may\n // change, if a single period manifest is refreshed with another manifest with a single\n // period, and both the start and end times are increased, then the only way to determine\n // if it's a new period or an old one that has changed is to look through the segments of\n // each playlist and determine the presentation time bounds to find a match. In addition,\n // if the period start changed to exceed the old period end, then there would be no\n // match, and it would not be possible to determine whether the refreshed period is a new\n // one or the old one.\n const oldPlaylists = oldManifest.playlists.concat(getMediaGroupPlaylists(oldManifest));\n const newPlaylists = newManifest.playlists.concat(getMediaGroupPlaylists(newManifest)); // Save all seen timelineStarts to the new manifest. Although this potentially means that\n // there's a \"memory leak\" in that it will never stop growing, in reality, only a couple\n // of properties are saved for each seen Period. Even long running live streams won't\n // generate too many Periods, unless the stream is watched for decades. In the future,\n // this can be optimized by mapping to discontinuity sequence numbers for each timeline,\n // but it may not become an issue, and the additional info can be useful for debugging.\n\n newManifest.timelineStarts = getUniqueTimelineStarts([oldManifest.timelineStarts, newManifest.timelineStarts]);\n updateSequenceNumbers({\n oldPlaylists,\n newPlaylists,\n timelineStarts: newManifest.timelineStarts\n });\n return newManifest;\n };\n const generateSidxKey = sidx => sidx && sidx.uri + '-' + byteRangeToString(sidx.byterange);\n const mergeDiscontiguousPlaylists = playlists => {\n const mergedPlaylists = values(playlists.reduce((acc, playlist) => {\n // assuming playlist IDs are the same across periods\n // TODO: handle multiperiod where representation sets are not the same\n // across periods\n const name = playlist.attributes.id + (playlist.attributes.lang || '');\n if (!acc[name]) {\n // First Period\n acc[name] = playlist;\n acc[name].attributes.timelineStarts = [];\n } else {\n // Subsequent Periods\n if (playlist.segments) {\n // first segment of subsequent periods signal a discontinuity\n if (playlist.segments[0]) {\n playlist.segments[0].discontinuity = true;\n }\n acc[name].segments.push(...playlist.segments);\n } // bubble up contentProtection, this assumes all DRM content\n // has the same contentProtection\n\n if (playlist.attributes.contentProtection) {\n acc[name].attributes.contentProtection = playlist.attributes.contentProtection;\n }\n }\n acc[name].attributes.timelineStarts.push({\n // Although they represent the same number, it's important to have both to make it\n // compatible with HLS potentially having a similar attribute.\n start: playlist.attributes.periodStart,\n timeline: playlist.attributes.periodStart\n });\n return acc;\n }, {}));\n return mergedPlaylists.map(playlist => {\n playlist.discontinuityStarts = findIndexes(playlist.segments || [], 'discontinuity');\n return playlist;\n });\n };\n const addSidxSegmentsToPlaylist = (playlist, sidxMapping) => {\n const sidxKey = generateSidxKey(playlist.sidx);\n const sidxMatch = sidxKey && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx;\n if (sidxMatch) {\n addSidxSegmentsToPlaylist$1(playlist, sidxMatch, playlist.sidx.resolvedUri);\n }\n return playlist;\n };\n const addSidxSegmentsToPlaylists = (playlists, sidxMapping = {}) => {\n if (!Object.keys(sidxMapping).length) {\n return playlists;\n }\n for (const i in playlists) {\n playlists[i] = addSidxSegmentsToPlaylist(playlists[i], sidxMapping);\n }\n return playlists;\n };\n const formatAudioPlaylist = ({\n attributes,\n segments,\n sidx,\n mediaSequence,\n discontinuitySequence,\n discontinuityStarts\n }, isAudioOnly) => {\n const playlist = {\n attributes: {\n NAME: attributes.id,\n BANDWIDTH: attributes.bandwidth,\n CODECS: attributes.codecs,\n ['PROGRAM-ID']: 1\n },\n uri: '',\n endList: attributes.type === 'static',\n timeline: attributes.periodStart,\n resolvedUri: '',\n targetDuration: attributes.duration,\n discontinuitySequence,\n discontinuityStarts,\n timelineStarts: attributes.timelineStarts,\n mediaSequence,\n segments\n };\n if (attributes.contentProtection) {\n playlist.contentProtection = attributes.contentProtection;\n }\n if (sidx) {\n playlist.sidx = sidx;\n }\n if (isAudioOnly) {\n playlist.attributes.AUDIO = 'audio';\n playlist.attributes.SUBTITLES = 'subs';\n }\n return playlist;\n };\n const formatVttPlaylist = ({\n attributes,\n segments,\n mediaSequence,\n discontinuityStarts,\n discontinuitySequence\n }) => {\n if (typeof segments === 'undefined') {\n // vtt tracks may use single file in BaseURL\n segments = [{\n uri: attributes.baseUrl,\n timeline: attributes.periodStart,\n resolvedUri: attributes.baseUrl || '',\n duration: attributes.sourceDuration,\n number: 0\n }]; // targetDuration should be the same duration as the only segment\n\n attributes.duration = attributes.sourceDuration;\n }\n const m3u8Attributes = {\n NAME: attributes.id,\n BANDWIDTH: attributes.bandwidth,\n ['PROGRAM-ID']: 1\n };\n if (attributes.codecs) {\n m3u8Attributes.CODECS = attributes.codecs;\n }\n return {\n attributes: m3u8Attributes,\n uri: '',\n endList: attributes.type === 'static',\n timeline: attributes.periodStart,\n resolvedUri: attributes.baseUrl || '',\n targetDuration: attributes.duration,\n timelineStarts: attributes.timelineStarts,\n discontinuityStarts,\n discontinuitySequence,\n mediaSequence,\n segments\n };\n };\n const organizeAudioPlaylists = (playlists, sidxMapping = {}, isAudioOnly = false) => {\n let mainPlaylist;\n const formattedPlaylists = playlists.reduce((a, playlist) => {\n const role = playlist.attributes.role && playlist.attributes.role.value || '';\n const language = playlist.attributes.lang || '';\n let label = playlist.attributes.label || 'main';\n if (language && !playlist.attributes.label) {\n const roleLabel = role ? ` (${role})` : '';\n label = `${playlist.attributes.lang}${roleLabel}`;\n }\n if (!a[label]) {\n a[label] = {\n language,\n autoselect: true,\n default: role === 'main',\n playlists: [],\n uri: ''\n };\n }\n const formatted = addSidxSegmentsToPlaylist(formatAudioPlaylist(playlist, isAudioOnly), sidxMapping);\n a[label].playlists.push(formatted);\n if (typeof mainPlaylist === 'undefined' && role === 'main') {\n mainPlaylist = playlist;\n mainPlaylist.default = true;\n }\n return a;\n }, {}); // if no playlists have role \"main\", mark the first as main\n\n if (!mainPlaylist) {\n const firstLabel = Object.keys(formattedPlaylists)[0];\n formattedPlaylists[firstLabel].default = true;\n }\n return formattedPlaylists;\n };\n const organizeVttPlaylists = (playlists, sidxMapping = {}) => {\n return playlists.reduce((a, playlist) => {\n const label = playlist.attributes.lang || 'text';\n if (!a[label]) {\n a[label] = {\n language: label,\n default: false,\n autoselect: false,\n playlists: [],\n uri: ''\n };\n }\n a[label].playlists.push(addSidxSegmentsToPlaylist(formatVttPlaylist(playlist), sidxMapping));\n return a;\n }, {});\n };\n const organizeCaptionServices = captionServices => captionServices.reduce((svcObj, svc) => {\n if (!svc) {\n return svcObj;\n }\n svc.forEach(service => {\n const {\n channel,\n language\n } = service;\n svcObj[language] = {\n autoselect: false,\n default: false,\n instreamId: channel,\n language\n };\n if (service.hasOwnProperty('aspectRatio')) {\n svcObj[language].aspectRatio = service.aspectRatio;\n }\n if (service.hasOwnProperty('easyReader')) {\n svcObj[language].easyReader = service.easyReader;\n }\n if (service.hasOwnProperty('3D')) {\n svcObj[language]['3D'] = service['3D'];\n }\n });\n return svcObj;\n }, {});\n const formatVideoPlaylist = ({\n attributes,\n segments,\n sidx,\n discontinuityStarts\n }) => {\n const playlist = {\n attributes: {\n NAME: attributes.id,\n AUDIO: 'audio',\n SUBTITLES: 'subs',\n RESOLUTION: {\n width: attributes.width,\n height: attributes.height\n },\n CODECS: attributes.codecs,\n BANDWIDTH: attributes.bandwidth,\n ['PROGRAM-ID']: 1\n },\n uri: '',\n endList: attributes.type === 'static',\n timeline: attributes.periodStart,\n resolvedUri: '',\n targetDuration: attributes.duration,\n discontinuityStarts,\n timelineStarts: attributes.timelineStarts,\n segments\n };\n if (attributes.frameRate) {\n playlist.attributes['FRAME-RATE'] = attributes.frameRate;\n }\n if (attributes.contentProtection) {\n playlist.contentProtection = attributes.contentProtection;\n }\n if (sidx) {\n playlist.sidx = sidx;\n }\n return playlist;\n };\n const videoOnly = ({\n attributes\n }) => attributes.mimeType === 'video/mp4' || attributes.mimeType === 'video/webm' || attributes.contentType === 'video';\n const audioOnly = ({\n attributes\n }) => attributes.mimeType === 'audio/mp4' || attributes.mimeType === 'audio/webm' || attributes.contentType === 'audio';\n const vttOnly = ({\n attributes\n }) => attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';\n /**\n * Contains start and timeline properties denoting a timeline start. For DASH, these will\n * be the same number.\n *\n * @typedef {Object} TimelineStart\n * @property {number} start - the start time of the timeline\n * @property {number} timeline - the timeline number\n */\n\n /**\n * Adds appropriate media and discontinuity sequence values to the segments and playlists.\n *\n * Throughout mpd-parser, the `number` attribute is used in relation to `startNumber`, a\n * DASH specific attribute used in constructing segment URI's from templates. However, from\n * an HLS perspective, the `number` attribute on a segment would be its `mediaSequence`\n * value, which should start at the original media sequence value (or 0) and increment by 1\n * for each segment thereafter. Since DASH's `startNumber` values are independent per\n * period, it doesn't make sense to use it for `number`. Instead, assume everything starts\n * from a 0 mediaSequence value and increment from there.\n *\n * Note that VHS currently doesn't use the `number` property, but it can be helpful for\n * debugging and making sense of the manifest.\n *\n * For live playlists, to account for values increasing in manifests when periods are\n * removed on refreshes, merging logic should be used to update the numbers to their\n * appropriate values (to ensure they're sequential and increasing).\n *\n * @param {Object[]} playlists - the playlists to update\n * @param {TimelineStart[]} timelineStarts - the timeline starts for the manifest\n */\n\n const addMediaSequenceValues = (playlists, timelineStarts) => {\n // increment all segments sequentially\n playlists.forEach(playlist => {\n playlist.mediaSequence = 0;\n playlist.discontinuitySequence = timelineStarts.findIndex(function ({\n timeline\n }) {\n return timeline === playlist.timeline;\n });\n if (!playlist.segments) {\n return;\n }\n playlist.segments.forEach((segment, index) => {\n segment.number = index;\n });\n });\n };\n /**\n * Given a media group object, flattens all playlists within the media group into a single\n * array.\n *\n * @param {Object} mediaGroupObject - the media group object\n *\n * @return {Object[]}\n * The media group playlists\n */\n\n const flattenMediaGroupPlaylists = mediaGroupObject => {\n if (!mediaGroupObject) {\n return [];\n }\n return Object.keys(mediaGroupObject).reduce((acc, label) => {\n const labelContents = mediaGroupObject[label];\n return acc.concat(labelContents.playlists);\n }, []);\n };\n const toM3u8 = ({\n dashPlaylists,\n locations,\n sidxMapping = {},\n previousManifest\n }) => {\n if (!dashPlaylists.length) {\n return {};\n } // grab all main manifest attributes\n\n const {\n sourceDuration: duration,\n type,\n suggestedPresentationDelay,\n minimumUpdatePeriod\n } = dashPlaylists[0].attributes;\n const videoPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(videoOnly)).map(formatVideoPlaylist);\n const audioPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(audioOnly));\n const vttPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(vttOnly));\n const captions = dashPlaylists.map(playlist => playlist.attributes.captionServices).filter(Boolean);\n const manifest = {\n allowCache: true,\n discontinuityStarts: [],\n segments: [],\n endList: true,\n mediaGroups: {\n AUDIO: {},\n VIDEO: {},\n ['CLOSED-CAPTIONS']: {},\n SUBTITLES: {}\n },\n uri: '',\n duration,\n playlists: addSidxSegmentsToPlaylists(videoPlaylists, sidxMapping)\n };\n if (minimumUpdatePeriod >= 0) {\n manifest.minimumUpdatePeriod = minimumUpdatePeriod * 1000;\n }\n if (locations) {\n manifest.locations = locations;\n }\n if (type === 'dynamic') {\n manifest.suggestedPresentationDelay = suggestedPresentationDelay;\n }\n const isAudioOnly = manifest.playlists.length === 0;\n const organizedAudioGroup = audioPlaylists.length ? organizeAudioPlaylists(audioPlaylists, sidxMapping, isAudioOnly) : null;\n const organizedVttGroup = vttPlaylists.length ? organizeVttPlaylists(vttPlaylists, sidxMapping) : null;\n const formattedPlaylists = videoPlaylists.concat(flattenMediaGroupPlaylists(organizedAudioGroup), flattenMediaGroupPlaylists(organizedVttGroup));\n const playlistTimelineStarts = formattedPlaylists.map(({\n timelineStarts\n }) => timelineStarts);\n manifest.timelineStarts = getUniqueTimelineStarts(playlistTimelineStarts);\n addMediaSequenceValues(formattedPlaylists, manifest.timelineStarts);\n if (organizedAudioGroup) {\n manifest.mediaGroups.AUDIO.audio = organizedAudioGroup;\n }\n if (organizedVttGroup) {\n manifest.mediaGroups.SUBTITLES.subs = organizedVttGroup;\n }\n if (captions.length) {\n manifest.mediaGroups['CLOSED-CAPTIONS'].cc = organizeCaptionServices(captions);\n }\n if (previousManifest) {\n return positionManifestOnTimeline({\n oldManifest: previousManifest,\n newManifest: manifest\n });\n }\n return manifest;\n };\n\n /**\n * Calculates the R (repetition) value for a live stream (for the final segment\n * in a manifest where the r value is negative 1)\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @param {number} time\n * current time (typically the total time up until the final segment)\n * @param {number} duration\n * duration property for the given <S />\n *\n * @return {number}\n * R value to reach the end of the given period\n */\n const getLiveRValue = (attributes, time, duration) => {\n const {\n NOW,\n clientOffset,\n availabilityStartTime,\n timescale = 1,\n periodStart = 0,\n minimumUpdatePeriod = 0\n } = attributes;\n const now = (NOW + clientOffset) / 1000;\n const periodStartWC = availabilityStartTime + periodStart;\n const periodEndWC = now + minimumUpdatePeriod;\n const periodDuration = periodEndWC - periodStartWC;\n return Math.ceil((periodDuration * timescale - time) / duration);\n };\n /**\n * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment\n * timing and duration\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @param {Object[]} segmentTimeline\n * List of objects representing the attributes of each S element contained within\n *\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n * List of Objects with segment timing and duration info\n */\n\n const parseByTimeline = (attributes, segmentTimeline) => {\n const {\n type,\n minimumUpdatePeriod = 0,\n media = '',\n sourceDuration,\n timescale = 1,\n startNumber = 1,\n periodStart: timeline\n } = attributes;\n const segments = [];\n let time = -1;\n for (let sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {\n const S = segmentTimeline[sIndex];\n const duration = S.d;\n const repeat = S.r || 0;\n const segmentTime = S.t || 0;\n if (time < 0) {\n // first segment\n time = segmentTime;\n }\n if (segmentTime && segmentTime > time) {\n // discontinuity\n // TODO: How to handle this type of discontinuity\n // timeline++ here would treat it like HLS discontuity and content would\n // get appended without gap\n // E.G.\n // <S t=\"0\" d=\"1\" />\n // <S d=\"1\" />\n // <S d=\"1\" />\n // <S t=\"5\" d=\"1\" />\n // would have $Time$ values of [0, 1, 2, 5]\n // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)\n // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)\n // does the value of sourceDuration consider this when calculating arbitrary\n // negative @r repeat value?\n // E.G. Same elements as above with this added at the end\n // <S d=\"1\" r=\"-1\" />\n // with a sourceDuration of 10\n // Would the 2 gaps be included in the time duration calculations resulting in\n // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments\n // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?\n time = segmentTime;\n }\n let count;\n if (repeat < 0) {\n const nextS = sIndex + 1;\n if (nextS === segmentTimeline.length) {\n // last segment\n if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {\n count = getLiveRValue(attributes, time, duration);\n } else {\n // TODO: This may be incorrect depending on conclusion of TODO above\n count = (sourceDuration * timescale - time) / duration;\n }\n } else {\n count = (segmentTimeline[nextS].t - time) / duration;\n }\n } else {\n count = repeat + 1;\n }\n const end = startNumber + segments.length + count;\n let number = startNumber + segments.length;\n while (number < end) {\n segments.push({\n number,\n duration: duration / timescale,\n time,\n timeline\n });\n time += duration;\n number++;\n }\n }\n return segments;\n };\n const identifierPattern = /\\$([A-z]*)(?:(%0)([0-9]+)d)?\\$/g;\n /**\n * Replaces template identifiers with corresponding values. To be used as the callback\n * for String.prototype.replace\n *\n * @name replaceCallback\n * @function\n * @param {string} match\n * Entire match of identifier\n * @param {string} identifier\n * Name of matched identifier\n * @param {string} format\n * Format tag string. Its presence indicates that padding is expected\n * @param {string} width\n * Desired length of the replaced value. Values less than this width shall be left\n * zero padded\n * @return {string}\n * Replacement for the matched identifier\n */\n\n /**\n * Returns a function to be used as a callback for String.prototype.replace to replace\n * template identifiers\n *\n * @param {Obect} values\n * Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n * Value of the Representation@id attribute\n * @param {number} values.Number\n * Number of the corresponding segment\n * @param {number} values.Bandwidth\n * Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n * Timestamp value of the corresponding segment\n * @return {replaceCallback}\n * Callback to be used with String.prototype.replace to replace identifiers\n */\n\n const identifierReplacement = values => (match, identifier, format, width) => {\n if (match === '$$') {\n // escape sequence\n return '$';\n }\n if (typeof values[identifier] === 'undefined') {\n return match;\n }\n const value = '' + values[identifier];\n if (identifier === 'RepresentationID') {\n // Format tag shall not be present with RepresentationID\n return value;\n }\n if (!format) {\n width = 1;\n } else {\n width = parseInt(width, 10);\n }\n if (value.length >= width) {\n return value;\n }\n return `${new Array(width - value.length + 1).join('0')}${value}`;\n };\n /**\n * Constructs a segment url from a template string\n *\n * @param {string} url\n * Template string to construct url from\n * @param {Obect} values\n * Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n * Value of the Representation@id attribute\n * @param {number} values.Number\n * Number of the corresponding segment\n * @param {number} values.Bandwidth\n * Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n * Timestamp value of the corresponding segment\n * @return {string}\n * Segment url with identifiers replaced\n */\n\n const constructTemplateUrl = (url, values) => url.replace(identifierPattern, identifierReplacement(values));\n /**\n * Generates a list of objects containing timing and duration information about each\n * segment needed to generate segment uris and the complete segment object\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @param {Object[]|undefined} segmentTimeline\n * List of objects representing the attributes of each S element contained within\n * the SegmentTimeline element\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n * List of Objects with segment timing and duration info\n */\n\n const parseTemplateInfo = (attributes, segmentTimeline) => {\n if (!attributes.duration && !segmentTimeline) {\n // if neither @duration or SegmentTimeline are present, then there shall be exactly\n // one media segment\n return [{\n number: attributes.startNumber || 1,\n duration: attributes.sourceDuration,\n time: 0,\n timeline: attributes.periodStart\n }];\n }\n if (attributes.duration) {\n return parseByDuration(attributes);\n }\n return parseByTimeline(attributes, segmentTimeline);\n };\n /**\n * Generates a list of segments using information provided by the SegmentTemplate element\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @param {Object[]|undefined} segmentTimeline\n * List of objects representing the attributes of each S element contained within\n * the SegmentTimeline element\n * @return {Object[]}\n * List of segment objects\n */\n\n const segmentsFromTemplate = (attributes, segmentTimeline) => {\n const templateValues = {\n RepresentationID: attributes.id,\n Bandwidth: attributes.bandwidth || 0\n };\n const {\n initialization = {\n sourceURL: '',\n range: ''\n }\n } = attributes;\n const mapSegment = urlTypeToSegment({\n baseUrl: attributes.baseUrl,\n source: constructTemplateUrl(initialization.sourceURL, templateValues),\n range: initialization.range\n });\n const segments = parseTemplateInfo(attributes, segmentTimeline);\n return segments.map(segment => {\n templateValues.Number = segment.number;\n templateValues.Time = segment.time;\n const uri = constructTemplateUrl(attributes.media || '', templateValues); // See DASH spec section 5.3.9.2.2\n // - if timescale isn't present on any level, default to 1.\n\n const timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n const presentationTimeOffset = attributes.presentationTimeOffset || 0;\n const presentationTime =\n // Even if the @t attribute is not specified for the segment, segment.time is\n // calculated in mpd-parser prior to this, so it's assumed to be available.\n attributes.periodStart + (segment.time - presentationTimeOffset) / timescale;\n const map = {\n uri,\n timeline: segment.timeline,\n duration: segment.duration,\n resolvedUri: resolveUrl$1(attributes.baseUrl || '', uri),\n map: mapSegment,\n number: segment.number,\n presentationTime\n };\n return map;\n });\n };\n\n /**\n * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)\n * to an object that matches the output of a segment in videojs/mpd-parser\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @param {Object} segmentUrl\n * <SegmentURL> node to translate into a segment object\n * @return {Object} translated segment object\n */\n\n const SegmentURLToSegmentObject = (attributes, segmentUrl) => {\n const {\n baseUrl,\n initialization = {}\n } = attributes;\n const initSegment = urlTypeToSegment({\n baseUrl,\n source: initialization.sourceURL,\n range: initialization.range\n });\n const segment = urlTypeToSegment({\n baseUrl,\n source: segmentUrl.media,\n range: segmentUrl.mediaRange\n });\n segment.map = initSegment;\n return segment;\n };\n /**\n * Generates a list of segments using information provided by the SegmentList element\n * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes. Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n * Object containing all inherited attributes from parent elements with attribute\n * names as keys\n * @param {Object[]|undefined} segmentTimeline\n * List of objects representing the attributes of each S element contained within\n * the SegmentTimeline element\n * @return {Object.<Array>} list of segments\n */\n\n const segmentsFromList = (attributes, segmentTimeline) => {\n const {\n duration,\n segmentUrls = [],\n periodStart\n } = attributes; // Per spec (5.3.9.2.1) no way to determine segment duration OR\n // if both SegmentTimeline and @duration are defined, it is outside of spec.\n\n if (!duration && !segmentTimeline || duration && segmentTimeline) {\n throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);\n }\n const segmentUrlMap = segmentUrls.map(segmentUrlObject => SegmentURLToSegmentObject(attributes, segmentUrlObject));\n let segmentTimeInfo;\n if (duration) {\n segmentTimeInfo = parseByDuration(attributes);\n }\n if (segmentTimeline) {\n segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);\n }\n const segments = segmentTimeInfo.map((segmentTime, index) => {\n if (segmentUrlMap[index]) {\n const segment = segmentUrlMap[index]; // See DASH spec section 5.3.9.2.2\n // - if timescale isn't present on any level, default to 1.\n\n const timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n const presentationTimeOffset = attributes.presentationTimeOffset || 0;\n segment.timeline = segmentTime.timeline;\n segment.duration = segmentTime.duration;\n segment.number = segmentTime.number;\n segment.presentationTime = periodStart + (segmentTime.time - presentationTimeOffset) / timescale;\n return segment;\n } // Since we're mapping we should get rid of any blank segments (in case\n // the given SegmentTimeline is handling for more elements than we have\n // SegmentURLs for).\n }).filter(segment => segment);\n return segments;\n };\n const generateSegments = ({\n attributes,\n segmentInfo\n }) => {\n let segmentAttributes;\n let segmentsFn;\n if (segmentInfo.template) {\n segmentsFn = segmentsFromTemplate;\n segmentAttributes = merge$1(attributes, segmentInfo.template);\n } else if (segmentInfo.base) {\n segmentsFn = segmentsFromBase;\n segmentAttributes = merge$1(attributes, segmentInfo.base);\n } else if (segmentInfo.list) {\n segmentsFn = segmentsFromList;\n segmentAttributes = merge$1(attributes, segmentInfo.list);\n }\n const segmentsInfo = {\n attributes\n };\n if (!segmentsFn) {\n return segmentsInfo;\n }\n const segments = segmentsFn(segmentAttributes, segmentInfo.segmentTimeline); // The @duration attribute will be used to determin the playlist's targetDuration which\n // must be in seconds. Since we've generated the segment list, we no longer need\n // @duration to be in @timescale units, so we can convert it here.\n\n if (segmentAttributes.duration) {\n const {\n duration,\n timescale = 1\n } = segmentAttributes;\n segmentAttributes.duration = duration / timescale;\n } else if (segments.length) {\n // if there is no @duration attribute, use the largest segment duration as\n // as target duration\n segmentAttributes.duration = segments.reduce((max, segment) => {\n return Math.max(max, Math.ceil(segment.duration));\n }, 0);\n } else {\n segmentAttributes.duration = 0;\n }\n segmentsInfo.attributes = segmentAttributes;\n segmentsInfo.segments = segments; // This is a sidx box without actual segment information\n\n if (segmentInfo.base && segmentAttributes.indexRange) {\n segmentsInfo.sidx = segments[0];\n segmentsInfo.segments = [];\n }\n return segmentsInfo;\n };\n const toPlaylists = representations => representations.map(generateSegments);\n const findChildren = (element, name) => from(element.childNodes).filter(({\n tagName\n }) => tagName === name);\n const getContent = element => element.textContent.trim();\n\n /**\n * Converts the provided string that may contain a division operation to a number.\n *\n * @param {string} value - the provided string value\n *\n * @return {number} the parsed string value\n */\n const parseDivisionValue = value => {\n return parseFloat(value.split('/').reduce((prev, current) => prev / current));\n };\n const parseDuration = str => {\n const SECONDS_IN_YEAR = 365 * 24 * 60 * 60;\n const SECONDS_IN_MONTH = 30 * 24 * 60 * 60;\n const SECONDS_IN_DAY = 24 * 60 * 60;\n const SECONDS_IN_HOUR = 60 * 60;\n const SECONDS_IN_MIN = 60; // P10Y10M10DT10H10M10.1S\n\n const durationRegex = /P(?:(\\d*)Y)?(?:(\\d*)M)?(?:(\\d*)D)?(?:T(?:(\\d*)H)?(?:(\\d*)M)?(?:([\\d.]*)S)?)?/;\n const match = durationRegex.exec(str);\n if (!match) {\n return 0;\n }\n const [year, month, day, hour, minute, second] = match.slice(1);\n return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);\n };\n const parseDate = str => {\n // Date format without timezone according to ISO 8601\n // YYY-MM-DDThh:mm:ss.ssssss\n const dateRegex = /^\\d+-\\d+-\\d+T\\d+:\\d+:\\d+(\\.\\d+)?$/; // If the date string does not specifiy a timezone, we must specifiy UTC. This is\n // expressed by ending with 'Z'\n\n if (dateRegex.test(str)) {\n str += 'Z';\n }\n return Date.parse(str);\n };\n const parsers = {\n /**\n * Specifies the duration of the entire Media Presentation. Format is a duration string\n * as specified in ISO 8601\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The duration in seconds\n */\n mediaPresentationDuration(value) {\n return parseDuration(value);\n },\n /**\n * Specifies the Segment availability start time for all Segments referred to in this\n * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability\n * time. Format is a date string as specified in ISO 8601\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The date as seconds from unix epoch\n */\n availabilityStartTime(value) {\n return parseDate(value) / 1000;\n },\n /**\n * Specifies the smallest period between potential changes to the MPD. Format is a\n * duration string as specified in ISO 8601\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The duration in seconds\n */\n minimumUpdatePeriod(value) {\n return parseDuration(value);\n },\n /**\n * Specifies the suggested presentation delay. Format is a\n * duration string as specified in ISO 8601\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The duration in seconds\n */\n suggestedPresentationDelay(value) {\n return parseDuration(value);\n },\n /**\n * specifices the type of mpd. Can be either \"static\" or \"dynamic\"\n *\n * @param {string} value\n * value of attribute as a string\n *\n * @return {string}\n * The type as a string\n */\n type(value) {\n return value;\n },\n /**\n * Specifies the duration of the smallest time shifting buffer for any Representation\n * in the MPD. Format is a duration string as specified in ISO 8601\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The duration in seconds\n */\n timeShiftBufferDepth(value) {\n return parseDuration(value);\n },\n /**\n * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.\n * Format is a duration string as specified in ISO 8601\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The duration in seconds\n */\n start(value) {\n return parseDuration(value);\n },\n /**\n * Specifies the width of the visual presentation\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed width\n */\n width(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the height of the visual presentation\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed height\n */\n height(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the bitrate of the representation\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed bandwidth\n */\n bandwidth(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the frame rate of the representation\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed frame rate\n */\n frameRate(value) {\n return parseDivisionValue(value);\n },\n /**\n * Specifies the number of the first Media Segment in this Representation in the Period\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed number\n */\n startNumber(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the timescale in units per seconds\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed timescale\n */\n timescale(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the presentationTimeOffset.\n *\n * @param {string} value\n * value of the attribute as a string\n *\n * @return {number}\n * The parsed presentationTimeOffset\n */\n presentationTimeOffset(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the constant approximate Segment duration\n * NOTE: The <Period> element also contains an @duration attribute. This duration\n * specifies the duration of the Period. This attribute is currently not\n * supported by the rest of the parser, however we still check for it to prevent\n * errors.\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed duration\n */\n duration(value) {\n const parsedValue = parseInt(value, 10);\n if (isNaN(parsedValue)) {\n return parseDuration(value);\n }\n return parsedValue;\n },\n /**\n * Specifies the Segment duration, in units of the value of the @timescale.\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed duration\n */\n d(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the MPD start time, in @timescale units, the first Segment in the series\n * starts relative to the beginning of the Period\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed time\n */\n t(value) {\n return parseInt(value, 10);\n },\n /**\n * Specifies the repeat count of the number of following contiguous Segments with the\n * same duration expressed by the value of @d\n *\n * @param {string} value\n * value of attribute as a string\n * @return {number}\n * The parsed number\n */\n r(value) {\n return parseInt(value, 10);\n },\n /**\n * Default parser for all other attributes. Acts as a no-op and just returns the value\n * as a string\n *\n * @param {string} value\n * value of attribute as a string\n * @return {string}\n * Unparsed value\n */\n DEFAULT(value) {\n return value;\n }\n };\n /**\n * Gets all the attributes and values of the provided node, parses attributes with known\n * types, and returns an object with attribute names mapped to values.\n *\n * @param {Node} el\n * The node to parse attributes from\n * @return {Object}\n * Object with all attributes of el parsed\n */\n\n const parseAttributes = el => {\n if (!(el && el.attributes)) {\n return {};\n }\n return from(el.attributes).reduce((a, e) => {\n const parseFn = parsers[e.name] || parsers.DEFAULT;\n a[e.name] = parseFn(e.value);\n return a;\n }, {});\n };\n const keySystemsMap = {\n 'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',\n 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',\n 'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',\n 'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime'\n };\n /**\n * Builds a list of urls that is the product of the reference urls and BaseURL values\n *\n * @param {string[]} referenceUrls\n * List of reference urls to resolve to\n * @param {Node[]} baseUrlElements\n * List of BaseURL nodes from the mpd\n * @return {string[]}\n * List of resolved urls\n */\n\n const buildBaseUrls = (referenceUrls, baseUrlElements) => {\n if (!baseUrlElements.length) {\n return referenceUrls;\n }\n return flatten(referenceUrls.map(function (reference) {\n return baseUrlElements.map(function (baseUrlElement) {\n return resolveUrl$1(reference, getContent(baseUrlElement));\n });\n }));\n };\n /**\n * Contains all Segment information for its containing AdaptationSet\n *\n * @typedef {Object} SegmentInformation\n * @property {Object|undefined} template\n * Contains the attributes for the SegmentTemplate node\n * @property {Object[]|undefined} segmentTimeline\n * Contains a list of atrributes for each S node within the SegmentTimeline node\n * @property {Object|undefined} list\n * Contains the attributes for the SegmentList node\n * @property {Object|undefined} base\n * Contains the attributes for the SegmentBase node\n */\n\n /**\n * Returns all available Segment information contained within the AdaptationSet node\n *\n * @param {Node} adaptationSet\n * The AdaptationSet node to get Segment information from\n * @return {SegmentInformation}\n * The Segment information contained within the provided AdaptationSet\n */\n\n const getSegmentInformation = adaptationSet => {\n const segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];\n const segmentList = findChildren(adaptationSet, 'SegmentList')[0];\n const segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(s => merge$1({\n tag: 'SegmentURL'\n }, parseAttributes(s)));\n const segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];\n const segmentTimelineParentNode = segmentList || segmentTemplate;\n const segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];\n const segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;\n const segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0]; // SegmentTemplate is handled slightly differently, since it can have both\n // @initialization and an <Initialization> node. @initialization can be templated,\n // while the node can have a url and range specified. If the <SegmentTemplate> has\n // both @initialization and an <Initialization> subelement we opt to override with\n // the node, as this interaction is not defined in the spec.\n\n const template = segmentTemplate && parseAttributes(segmentTemplate);\n if (template && segmentInitialization) {\n template.initialization = segmentInitialization && parseAttributes(segmentInitialization);\n } else if (template && template.initialization) {\n // If it is @initialization we convert it to an object since this is the format that\n // later functions will rely on for the initialization segment. This is only valid\n // for <SegmentTemplate>\n template.initialization = {\n sourceURL: template.initialization\n };\n }\n const segmentInfo = {\n template,\n segmentTimeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(s => parseAttributes(s)),\n list: segmentList && merge$1(parseAttributes(segmentList), {\n segmentUrls,\n initialization: parseAttributes(segmentInitialization)\n }),\n base: segmentBase && merge$1(parseAttributes(segmentBase), {\n initialization: parseAttributes(segmentInitialization)\n })\n };\n Object.keys(segmentInfo).forEach(key => {\n if (!segmentInfo[key]) {\n delete segmentInfo[key];\n }\n });\n return segmentInfo;\n };\n /**\n * Contains Segment information and attributes needed to construct a Playlist object\n * from a Representation\n *\n * @typedef {Object} RepresentationInformation\n * @property {SegmentInformation} segmentInfo\n * Segment information for this Representation\n * @property {Object} attributes\n * Inherited attributes for this Representation\n */\n\n /**\n * Maps a Representation node to an object containing Segment information and attributes\n *\n * @name inheritBaseUrlsCallback\n * @function\n * @param {Node} representation\n * Representation node from the mpd\n * @return {RepresentationInformation}\n * Representation information needed to construct a Playlist object\n */\n\n /**\n * Returns a callback for Array.prototype.map for mapping Representation nodes to\n * Segment information and attributes using inherited BaseURL nodes.\n *\n * @param {Object} adaptationSetAttributes\n * Contains attributes inherited by the AdaptationSet\n * @param {string[]} adaptationSetBaseUrls\n * Contains list of resolved base urls inherited by the AdaptationSet\n * @param {SegmentInformation} adaptationSetSegmentInfo\n * Contains Segment information for the AdaptationSet\n * @return {inheritBaseUrlsCallback}\n * Callback map function\n */\n\n const inheritBaseUrls = (adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) => representation => {\n const repBaseUrlElements = findChildren(representation, 'BaseURL');\n const repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);\n const attributes = merge$1(adaptationSetAttributes, parseAttributes(representation));\n const representationSegmentInfo = getSegmentInformation(representation);\n return repBaseUrls.map(baseUrl => {\n return {\n segmentInfo: merge$1(adaptationSetSegmentInfo, representationSegmentInfo),\n attributes: merge$1(attributes, {\n baseUrl\n })\n };\n });\n };\n /**\n * Tranforms a series of content protection nodes to\n * an object containing pssh data by key system\n *\n * @param {Node[]} contentProtectionNodes\n * Content protection nodes\n * @return {Object}\n * Object containing pssh data by key system\n */\n\n const generateKeySystemInformation = contentProtectionNodes => {\n return contentProtectionNodes.reduce((acc, node) => {\n const attributes = parseAttributes(node); // Although it could be argued that according to the UUID RFC spec the UUID string (a-f chars) should be generated\n // as a lowercase string it also mentions it should be treated as case-insensitive on input. Since the key system\n // UUIDs in the keySystemsMap are hardcoded as lowercase in the codebase there isn't any reason not to do\n // .toLowerCase() on the input UUID string from the manifest (at least I could not think of one).\n\n if (attributes.schemeIdUri) {\n attributes.schemeIdUri = attributes.schemeIdUri.toLowerCase();\n }\n const keySystem = keySystemsMap[attributes.schemeIdUri];\n if (keySystem) {\n acc[keySystem] = {\n attributes\n };\n const psshNode = findChildren(node, 'cenc:pssh')[0];\n if (psshNode) {\n const pssh = getContent(psshNode);\n acc[keySystem].pssh = pssh && decodeB64ToUint8Array(pssh);\n }\n }\n return acc;\n }, {});\n }; // defined in ANSI_SCTE 214-1 2016\n\n const parseCaptionServiceMetadata = service => {\n // 608 captions\n if (service.schemeIdUri === 'urn:scte:dash:cc:cea-608:2015') {\n const values = typeof service.value !== 'string' ? [] : service.value.split(';');\n return values.map(value => {\n let channel;\n let language; // default language to value\n\n language = value;\n if (/^CC\\d=/.test(value)) {\n [channel, language] = value.split('=');\n } else if (/^CC\\d$/.test(value)) {\n channel = value;\n }\n return {\n channel,\n language\n };\n });\n } else if (service.schemeIdUri === 'urn:scte:dash:cc:cea-708:2015') {\n const values = typeof service.value !== 'string' ? [] : service.value.split(';');\n return values.map(value => {\n const flags = {\n // service or channel number 1-63\n 'channel': undefined,\n // language is a 3ALPHA per ISO 639.2/B\n // field is required\n 'language': undefined,\n // BIT 1/0 or ?\n // default value is 1, meaning 16:9 aspect ratio, 0 is 4:3, ? is unknown\n 'aspectRatio': 1,\n // BIT 1/0\n // easy reader flag indicated the text is tailed to the needs of beginning readers\n // default 0, or off\n 'easyReader': 0,\n // BIT 1/0\n // If 3d metadata is present (CEA-708.1) then 1\n // default 0\n '3D': 0\n };\n if (/=/.test(value)) {\n const [channel, opts = ''] = value.split('=');\n flags.channel = channel;\n flags.language = value;\n opts.split(',').forEach(opt => {\n const [name, val] = opt.split(':');\n if (name === 'lang') {\n flags.language = val; // er for easyReadery\n } else if (name === 'er') {\n flags.easyReader = Number(val); // war for wide aspect ratio\n } else if (name === 'war') {\n flags.aspectRatio = Number(val);\n } else if (name === '3D') {\n flags['3D'] = Number(val);\n }\n });\n } else {\n flags.language = value;\n }\n if (flags.channel) {\n flags.channel = 'SERVICE' + flags.channel;\n }\n return flags;\n });\n }\n };\n /**\n * Maps an AdaptationSet node to a list of Representation information objects\n *\n * @name toRepresentationsCallback\n * @function\n * @param {Node} adaptationSet\n * AdaptationSet node from the mpd\n * @return {RepresentationInformation[]}\n * List of objects containing Representaion information\n */\n\n /**\n * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of\n * Representation information objects\n *\n * @param {Object} periodAttributes\n * Contains attributes inherited by the Period\n * @param {string[]} periodBaseUrls\n * Contains list of resolved base urls inherited by the Period\n * @param {string[]} periodSegmentInfo\n * Contains Segment Information at the period level\n * @return {toRepresentationsCallback}\n * Callback map function\n */\n\n const toRepresentations = (periodAttributes, periodBaseUrls, periodSegmentInfo) => adaptationSet => {\n const adaptationSetAttributes = parseAttributes(adaptationSet);\n const adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));\n const role = findChildren(adaptationSet, 'Role')[0];\n const roleAttributes = {\n role: parseAttributes(role)\n };\n let attrs = merge$1(periodAttributes, adaptationSetAttributes, roleAttributes);\n const accessibility = findChildren(adaptationSet, 'Accessibility')[0];\n const captionServices = parseCaptionServiceMetadata(parseAttributes(accessibility));\n if (captionServices) {\n attrs = merge$1(attrs, {\n captionServices\n });\n }\n const label = findChildren(adaptationSet, 'Label')[0];\n if (label && label.childNodes.length) {\n const labelVal = label.childNodes[0].nodeValue.trim();\n attrs = merge$1(attrs, {\n label: labelVal\n });\n }\n const contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));\n if (Object.keys(contentProtection).length) {\n attrs = merge$1(attrs, {\n contentProtection\n });\n }\n const segmentInfo = getSegmentInformation(adaptationSet);\n const representations = findChildren(adaptationSet, 'Representation');\n const adaptationSetSegmentInfo = merge$1(periodSegmentInfo, segmentInfo);\n return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));\n };\n /**\n * Contains all period information for mapping nodes onto adaptation sets.\n *\n * @typedef {Object} PeriodInformation\n * @property {Node} period.node\n * Period node from the mpd\n * @property {Object} period.attributes\n * Parsed period attributes from node plus any added\n */\n\n /**\n * Maps a PeriodInformation object to a list of Representation information objects for all\n * AdaptationSet nodes contained within the Period.\n *\n * @name toAdaptationSetsCallback\n * @function\n * @param {PeriodInformation} period\n * Period object containing necessary period information\n * @param {number} periodStart\n * Start time of the Period within the mpd\n * @return {RepresentationInformation[]}\n * List of objects containing Representaion information\n */\n\n /**\n * Returns a callback for Array.prototype.map for mapping Period nodes to a list of\n * Representation information objects\n *\n * @param {Object} mpdAttributes\n * Contains attributes inherited by the mpd\n * @param {string[]} mpdBaseUrls\n * Contains list of resolved base urls inherited by the mpd\n * @return {toAdaptationSetsCallback}\n * Callback map function\n */\n\n const toAdaptationSets = (mpdAttributes, mpdBaseUrls) => (period, index) => {\n const periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period.node, 'BaseURL'));\n const periodAttributes = merge$1(mpdAttributes, {\n periodStart: period.attributes.start\n });\n if (typeof period.attributes.duration === 'number') {\n periodAttributes.periodDuration = period.attributes.duration;\n }\n const adaptationSets = findChildren(period.node, 'AdaptationSet');\n const periodSegmentInfo = getSegmentInformation(period.node);\n return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));\n };\n /**\n * Gets Period@start property for a given period.\n *\n * @param {Object} options\n * Options object\n * @param {Object} options.attributes\n * Period attributes\n * @param {Object} [options.priorPeriodAttributes]\n * Prior period attributes (if prior period is available)\n * @param {string} options.mpdType\n * The MPD@type these periods came from\n * @return {number|null}\n * The period start, or null if it's an early available period or error\n */\n\n const getPeriodStart = ({\n attributes,\n priorPeriodAttributes,\n mpdType\n }) => {\n // Summary of period start time calculation from DASH spec section 5.3.2.1\n //\n // A period's start is the first period's start + time elapsed after playing all\n // prior periods to this one. Periods continue one after the other in time (without\n // gaps) until the end of the presentation.\n //\n // The value of Period@start should be:\n // 1. if Period@start is present: value of Period@start\n // 2. if previous period exists and it has @duration: previous Period@start +\n // previous Period@duration\n // 3. if this is first period and MPD@type is 'static': 0\n // 4. in all other cases, consider the period an \"early available period\" (note: not\n // currently supported)\n // (1)\n if (typeof attributes.start === 'number') {\n return attributes.start;\n } // (2)\n\n if (priorPeriodAttributes && typeof priorPeriodAttributes.start === 'number' && typeof priorPeriodAttributes.duration === 'number') {\n return priorPeriodAttributes.start + priorPeriodAttributes.duration;\n } // (3)\n\n if (!priorPeriodAttributes && mpdType === 'static') {\n return 0;\n } // (4)\n // There is currently no logic for calculating the Period@start value if there is\n // no Period@start or prior Period@start and Period@duration available. This is not made\n // explicit by the DASH interop guidelines or the DASH spec, however, since there's\n // nothing about any other resolution strategies, it's implied. Thus, this case should\n // be considered an early available period, or error, and null should suffice for both\n // of those cases.\n\n return null;\n };\n /**\n * Traverses the mpd xml tree to generate a list of Representation information objects\n * that have inherited attributes from parent nodes\n *\n * @param {Node} mpd\n * The root node of the mpd\n * @param {Object} options\n * Available options for inheritAttributes\n * @param {string} options.manifestUri\n * The uri source of the mpd\n * @param {number} options.NOW\n * Current time per DASH IOP. Default is current time in ms since epoch\n * @param {number} options.clientOffset\n * Client time difference from NOW (in milliseconds)\n * @return {RepresentationInformation[]}\n * List of objects containing Representation information\n */\n\n const inheritAttributes = (mpd, options = {}) => {\n const {\n manifestUri = '',\n NOW = Date.now(),\n clientOffset = 0\n } = options;\n const periodNodes = findChildren(mpd, 'Period');\n if (!periodNodes.length) {\n throw new Error(errors.INVALID_NUMBER_OF_PERIOD);\n }\n const locations = findChildren(mpd, 'Location');\n const mpdAttributes = parseAttributes(mpd);\n const mpdBaseUrls = buildBaseUrls([manifestUri], findChildren(mpd, 'BaseURL')); // See DASH spec section 5.3.1.2, Semantics of MPD element. Default type to 'static'.\n\n mpdAttributes.type = mpdAttributes.type || 'static';\n mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;\n mpdAttributes.NOW = NOW;\n mpdAttributes.clientOffset = clientOffset;\n if (locations.length) {\n mpdAttributes.locations = locations.map(getContent);\n }\n const periods = []; // Since toAdaptationSets acts on individual periods right now, the simplest approach to\n // adding properties that require looking at prior periods is to parse attributes and add\n // missing ones before toAdaptationSets is called. If more such properties are added, it\n // may be better to refactor toAdaptationSets.\n\n periodNodes.forEach((node, index) => {\n const attributes = parseAttributes(node); // Use the last modified prior period, as it may contain added information necessary\n // for this period.\n\n const priorPeriod = periods[index - 1];\n attributes.start = getPeriodStart({\n attributes,\n priorPeriodAttributes: priorPeriod ? priorPeriod.attributes : null,\n mpdType: mpdAttributes.type\n });\n periods.push({\n node,\n attributes\n });\n });\n return {\n locations: mpdAttributes.locations,\n representationInfo: flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls)))\n };\n };\n const stringToMpdXml = manifestString => {\n if (manifestString === '') {\n throw new Error(errors.DASH_EMPTY_MANIFEST);\n }\n const parser = new DOMParser();\n let xml;\n let mpd;\n try {\n xml = parser.parseFromString(manifestString, 'application/xml');\n mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;\n } catch (e) {// ie 11 throwsw on invalid xml\n }\n if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {\n throw new Error(errors.DASH_INVALID_XML);\n }\n return mpd;\n };\n\n /**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} mpd\n * XML string of the MPD manifest\n * @return {Object|null}\n * Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n const parseUTCTimingScheme = mpd => {\n const UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];\n if (!UTCTimingNode) {\n return null;\n }\n const attributes = parseAttributes(UTCTimingNode);\n switch (attributes.schemeIdUri) {\n case 'urn:mpeg:dash:utc:http-head:2014':\n case 'urn:mpeg:dash:utc:http-head:2012':\n attributes.method = 'HEAD';\n break;\n case 'urn:mpeg:dash:utc:http-xsdate:2014':\n case 'urn:mpeg:dash:utc:http-iso:2014':\n case 'urn:mpeg:dash:utc:http-xsdate:2012':\n case 'urn:mpeg:dash:utc:http-iso:2012':\n attributes.method = 'GET';\n break;\n case 'urn:mpeg:dash:utc:direct:2014':\n case 'urn:mpeg:dash:utc:direct:2012':\n attributes.method = 'DIRECT';\n attributes.value = Date.parse(attributes.value);\n break;\n case 'urn:mpeg:dash:utc:http-ntp:2014':\n case 'urn:mpeg:dash:utc:ntp:2014':\n case 'urn:mpeg:dash:utc:sntp:2014':\n default:\n throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);\n }\n return attributes;\n };\n /*\n * Given a DASH manifest string and options, parses the DASH manifest into an object in the\n * form outputed by m3u8-parser and accepted by videojs/http-streaming.\n *\n * For live DASH manifests, if `previousManifest` is provided in options, then the newly\n * parsed DASH manifest will have its media sequence and discontinuity sequence values\n * updated to reflect its position relative to the prior manifest.\n *\n * @param {string} manifestString - the DASH manifest as a string\n * @param {options} [options] - any options\n *\n * @return {Object} the manifest object\n */\n\n const parse = (manifestString, options = {}) => {\n const parsedManifestInfo = inheritAttributes(stringToMpdXml(manifestString), options);\n const playlists = toPlaylists(parsedManifestInfo.representationInfo);\n return toM3u8({\n dashPlaylists: playlists,\n locations: parsedManifestInfo.locations,\n sidxMapping: options.sidxMapping,\n previousManifest: options.previousManifest\n });\n };\n /**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} manifestString\n * XML string of the MPD manifest\n * @return {Object|null}\n * Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n const parseUTCTiming = manifestString => parseUTCTimingScheme(stringToMpdXml(manifestString));\n\n var MAX_UINT32 = Math.pow(2, 32);\n var getUint64$1 = function (uint8) {\n var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n var value;\n if (dv.getBigUint64) {\n value = dv.getBigUint64(0);\n if (value < Number.MAX_SAFE_INTEGER) {\n return Number(value);\n }\n return value;\n }\n return dv.getUint32(0) * MAX_UINT32 + dv.getUint32(4);\n };\n var numbers = {\n getUint64: getUint64$1,\n MAX_UINT32: MAX_UINT32\n };\n\n var getUint64 = numbers.getUint64;\n var parseSidx = function (data) {\n var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n result = {\n version: data[0],\n flags: new Uint8Array(data.subarray(1, 4)),\n references: [],\n referenceId: view.getUint32(4),\n timescale: view.getUint32(8)\n },\n i = 12;\n if (result.version === 0) {\n result.earliestPresentationTime = view.getUint32(i);\n result.firstOffset = view.getUint32(i + 4);\n i += 8;\n } else {\n // read 64 bits\n result.earliestPresentationTime = getUint64(data.subarray(i));\n result.firstOffset = getUint64(data.subarray(i + 8));\n i += 16;\n }\n i += 2; // reserved\n\n var referenceCount = view.getUint16(i);\n i += 2; // start of references\n\n for (; referenceCount > 0; i += 12, referenceCount--) {\n result.references.push({\n referenceType: (data[i] & 0x80) >>> 7,\n referencedSize: view.getUint32(i) & 0x7FFFFFFF,\n subsegmentDuration: view.getUint32(i + 4),\n startsWithSap: !!(data[i + 8] & 0x80),\n sapType: (data[i + 8] & 0x70) >>> 4,\n sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF\n });\n }\n return result;\n };\n var parseSidx_1 = parseSidx;\n\n var ID3 = toUint8([0x49, 0x44, 0x33]);\n var getId3Size = function getId3Size(bytes, offset) {\n if (offset === void 0) {\n offset = 0;\n }\n bytes = toUint8(bytes);\n var flags = bytes[offset + 5];\n var returnSize = bytes[offset + 6] << 21 | bytes[offset + 7] << 14 | bytes[offset + 8] << 7 | bytes[offset + 9];\n var footerPresent = (flags & 16) >> 4;\n if (footerPresent) {\n return returnSize + 20;\n }\n return returnSize + 10;\n };\n var getId3Offset = function getId3Offset(bytes, offset) {\n if (offset === void 0) {\n offset = 0;\n }\n bytes = toUint8(bytes);\n if (bytes.length - offset < 10 || !bytesMatch(bytes, ID3, {\n offset: offset\n })) {\n return offset;\n }\n offset += getId3Size(bytes, offset); // recursive check for id3 tags as some files\n // have multiple ID3 tag sections even though\n // they should not.\n\n return getId3Offset(bytes, offset);\n };\n\n var normalizePath$1 = function normalizePath(path) {\n if (typeof path === 'string') {\n return stringToBytes(path);\n }\n if (typeof path === 'number') {\n return path;\n }\n return path;\n };\n var normalizePaths$1 = function normalizePaths(paths) {\n if (!Array.isArray(paths)) {\n return [normalizePath$1(paths)];\n }\n return paths.map(function (p) {\n return normalizePath$1(p);\n });\n };\n /**\n * find any number of boxes by name given a path to it in an iso bmff\n * such as mp4.\n *\n * @param {TypedArray} bytes\n * bytes for the iso bmff to search for boxes in\n *\n * @param {Uint8Array[]|string[]|string|Uint8Array} name\n * An array of paths or a single path representing the name\n * of boxes to search through in bytes. Paths may be\n * uint8 (character codes) or strings.\n *\n * @param {boolean} [complete=false]\n * Should we search only for complete boxes on the final path.\n * This is very useful when you do not want to get back partial boxes\n * in the case of streaming files.\n *\n * @return {Uint8Array[]}\n * An array of the end paths that we found.\n */\n\n var findBox = function findBox(bytes, paths, complete) {\n if (complete === void 0) {\n complete = false;\n }\n paths = normalizePaths$1(paths);\n bytes = toUint8(bytes);\n var results = [];\n if (!paths.length) {\n // short-circuit the search for empty paths\n return results;\n }\n var i = 0;\n while (i < bytes.length) {\n var size = (bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]) >>> 0;\n var type = bytes.subarray(i + 4, i + 8); // invalid box format.\n\n if (size === 0) {\n break;\n }\n var end = i + size;\n if (end > bytes.length) {\n // this box is bigger than the number of bytes we have\n // and complete is set, we cannot find any more boxes.\n if (complete) {\n break;\n }\n end = bytes.length;\n }\n var data = bytes.subarray(i + 8, end);\n if (bytesMatch(type, paths[0])) {\n if (paths.length === 1) {\n // this is the end of the path and we've found the box we were\n // looking for\n results.push(data);\n } else {\n // recursively search for the next box along the path\n results.push.apply(results, findBox(data, paths.slice(1), complete));\n }\n }\n i = end;\n } // we've finished searching all of bytes\n\n return results;\n };\n\n // https://matroska-org.github.io/libebml/specs.html\n // https://www.matroska.org/technical/elements.html\n // https://www.webmproject.org/docs/container/\n\n var EBML_TAGS = {\n EBML: toUint8([0x1A, 0x45, 0xDF, 0xA3]),\n DocType: toUint8([0x42, 0x82]),\n Segment: toUint8([0x18, 0x53, 0x80, 0x67]),\n SegmentInfo: toUint8([0x15, 0x49, 0xA9, 0x66]),\n Tracks: toUint8([0x16, 0x54, 0xAE, 0x6B]),\n Track: toUint8([0xAE]),\n TrackNumber: toUint8([0xd7]),\n DefaultDuration: toUint8([0x23, 0xe3, 0x83]),\n TrackEntry: toUint8([0xAE]),\n TrackType: toUint8([0x83]),\n FlagDefault: toUint8([0x88]),\n CodecID: toUint8([0x86]),\n CodecPrivate: toUint8([0x63, 0xA2]),\n VideoTrack: toUint8([0xe0]),\n AudioTrack: toUint8([0xe1]),\n // Not used yet, but will be used for live webm/mkv\n // see https://www.matroska.org/technical/basics.html#block-structure\n // see https://www.matroska.org/technical/basics.html#simpleblock-structure\n Cluster: toUint8([0x1F, 0x43, 0xB6, 0x75]),\n Timestamp: toUint8([0xE7]),\n TimestampScale: toUint8([0x2A, 0xD7, 0xB1]),\n BlockGroup: toUint8([0xA0]),\n BlockDuration: toUint8([0x9B]),\n Block: toUint8([0xA1]),\n SimpleBlock: toUint8([0xA3])\n };\n /**\n * This is a simple table to determine the length\n * of things in ebml. The length is one based (starts at 1,\n * rather than zero) and for every zero bit before a one bit\n * we add one to length. We also need this table because in some\n * case we have to xor all the length bits from another value.\n */\n\n var LENGTH_TABLE = [128, 64, 32, 16, 8, 4, 2, 1];\n var getLength = function getLength(byte) {\n var len = 1;\n for (var i = 0; i < LENGTH_TABLE.length; i++) {\n if (byte & LENGTH_TABLE[i]) {\n break;\n }\n len++;\n }\n return len;\n }; // length in ebml is stored in the first 4 to 8 bits\n // of the first byte. 4 for the id length and 8 for the\n // data size length. Length is measured by converting the number to binary\n // then 1 + the number of zeros before a 1 is encountered starting\n // from the left.\n\n var getvint = function getvint(bytes, offset, removeLength, signed) {\n if (removeLength === void 0) {\n removeLength = true;\n }\n if (signed === void 0) {\n signed = false;\n }\n var length = getLength(bytes[offset]);\n var valueBytes = bytes.subarray(offset, offset + length); // NOTE that we do **not** subarray here because we need to copy these bytes\n // as they will be modified below to remove the dataSizeLen bits and we do not\n // want to modify the original data. normally we could just call slice on\n // uint8array but ie 11 does not support that...\n\n if (removeLength) {\n valueBytes = Array.prototype.slice.call(bytes, offset, offset + length);\n valueBytes[0] ^= LENGTH_TABLE[length - 1];\n }\n return {\n length: length,\n value: bytesToNumber(valueBytes, {\n signed: signed\n }),\n bytes: valueBytes\n };\n };\n var normalizePath = function normalizePath(path) {\n if (typeof path === 'string') {\n return path.match(/.{1,2}/g).map(function (p) {\n return normalizePath(p);\n });\n }\n if (typeof path === 'number') {\n return numberToBytes(path);\n }\n return path;\n };\n var normalizePaths = function normalizePaths(paths) {\n if (!Array.isArray(paths)) {\n return [normalizePath(paths)];\n }\n return paths.map(function (p) {\n return normalizePath(p);\n });\n };\n var getInfinityDataSize = function getInfinityDataSize(id, bytes, offset) {\n if (offset >= bytes.length) {\n return bytes.length;\n }\n var innerid = getvint(bytes, offset, false);\n if (bytesMatch(id.bytes, innerid.bytes)) {\n return offset;\n }\n var dataHeader = getvint(bytes, offset + innerid.length);\n return getInfinityDataSize(id, bytes, offset + dataHeader.length + dataHeader.value + innerid.length);\n };\n /**\n * Notes on the EBLM format.\n *\n * EBLM uses \"vints\" tags. Every vint tag contains\n * two parts\n *\n * 1. The length from the first byte. You get this by\n * converting the byte to binary and counting the zeros\n * before a 1. Then you add 1 to that. Examples\n * 00011111 = length 4 because there are 3 zeros before a 1.\n * 00100000 = length 3 because there are 2 zeros before a 1.\n * 00000011 = length 7 because there are 6 zeros before a 1.\n *\n * 2. The bits used for length are removed from the first byte\n * Then all the bytes are merged into a value. NOTE: this\n * is not the case for id ebml tags as there id includes\n * length bits.\n *\n */\n\n var findEbml = function findEbml(bytes, paths) {\n paths = normalizePaths(paths);\n bytes = toUint8(bytes);\n var results = [];\n if (!paths.length) {\n return results;\n }\n var i = 0;\n while (i < bytes.length) {\n var id = getvint(bytes, i, false);\n var dataHeader = getvint(bytes, i + id.length);\n var dataStart = i + id.length + dataHeader.length; // dataSize is unknown or this is a live stream\n\n if (dataHeader.value === 0x7f) {\n dataHeader.value = getInfinityDataSize(id, bytes, dataStart);\n if (dataHeader.value !== bytes.length) {\n dataHeader.value -= dataStart;\n }\n }\n var dataEnd = dataStart + dataHeader.value > bytes.length ? bytes.length : dataStart + dataHeader.value;\n var data = bytes.subarray(dataStart, dataEnd);\n if (bytesMatch(paths[0], id.bytes)) {\n if (paths.length === 1) {\n // this is the end of the paths and we've found the tag we were\n // looking for\n results.push(data);\n } else {\n // recursively search for the next tag inside of the data\n // of this one\n results = results.concat(findEbml(data, paths.slice(1)));\n }\n }\n var totalLength = id.length + dataHeader.length + data.length; // move past this tag entirely, we are not looking for it\n\n i += totalLength;\n }\n return results;\n }; // see https://www.matroska.org/technical/basics.html#block-structure\n\n var NAL_TYPE_ONE = toUint8([0x00, 0x00, 0x00, 0x01]);\n var NAL_TYPE_TWO = toUint8([0x00, 0x00, 0x01]);\n var EMULATION_PREVENTION = toUint8([0x00, 0x00, 0x03]);\n /**\n * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n * Sequence Payload\"\n *\n * @param data {Uint8Array} the bytes of a RBSP from a NAL\n * unit\n * @return {Uint8Array} the RBSP without any Emulation\n * Prevention Bytes\n */\n\n var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(bytes) {\n var positions = [];\n var i = 1; // Find all `Emulation Prevention Bytes`\n\n while (i < bytes.length - 2) {\n if (bytesMatch(bytes.subarray(i, i + 3), EMULATION_PREVENTION)) {\n positions.push(i + 2);\n i++;\n }\n i++;\n } // If no Emulation Prevention Bytes were found just return the original\n // array\n\n if (positions.length === 0) {\n return bytes;\n } // Create a new array to hold the NAL unit data\n\n var newLength = bytes.length - positions.length;\n var newData = new Uint8Array(newLength);\n var sourceIndex = 0;\n for (i = 0; i < newLength; sourceIndex++, i++) {\n if (sourceIndex === positions[0]) {\n // Skip this byte\n sourceIndex++; // Remove this position index\n\n positions.shift();\n }\n newData[i] = bytes[sourceIndex];\n }\n return newData;\n };\n var findNal = function findNal(bytes, dataType, types, nalLimit) {\n if (nalLimit === void 0) {\n nalLimit = Infinity;\n }\n bytes = toUint8(bytes);\n types = [].concat(types);\n var i = 0;\n var nalStart;\n var nalsFound = 0; // keep searching until:\n // we reach the end of bytes\n // we reach the maximum number of nals they want to seach\n // NOTE: that we disregard nalLimit when we have found the start\n // of the nal we want so that we can find the end of the nal we want.\n\n while (i < bytes.length && (nalsFound < nalLimit || nalStart)) {\n var nalOffset = void 0;\n if (bytesMatch(bytes.subarray(i), NAL_TYPE_ONE)) {\n nalOffset = 4;\n } else if (bytesMatch(bytes.subarray(i), NAL_TYPE_TWO)) {\n nalOffset = 3;\n } // we are unsynced,\n // find the next nal unit\n\n if (!nalOffset) {\n i++;\n continue;\n }\n nalsFound++;\n if (nalStart) {\n return discardEmulationPreventionBytes(bytes.subarray(nalStart, i));\n }\n var nalType = void 0;\n if (dataType === 'h264') {\n nalType = bytes[i + nalOffset] & 0x1f;\n } else if (dataType === 'h265') {\n nalType = bytes[i + nalOffset] >> 1 & 0x3f;\n }\n if (types.indexOf(nalType) !== -1) {\n nalStart = i + nalOffset;\n } // nal header is 1 length for h264, and 2 for h265\n\n i += nalOffset + (dataType === 'h264' ? 1 : 2);\n }\n return bytes.subarray(0, 0);\n };\n var findH264Nal = function findH264Nal(bytes, type, nalLimit) {\n return findNal(bytes, 'h264', type, nalLimit);\n };\n var findH265Nal = function findH265Nal(bytes, type, nalLimit) {\n return findNal(bytes, 'h265', type, nalLimit);\n };\n\n var CONSTANTS = {\n // \"webm\" string literal in hex\n 'webm': toUint8([0x77, 0x65, 0x62, 0x6d]),\n // \"matroska\" string literal in hex\n 'matroska': toUint8([0x6d, 0x61, 0x74, 0x72, 0x6f, 0x73, 0x6b, 0x61]),\n // \"fLaC\" string literal in hex\n 'flac': toUint8([0x66, 0x4c, 0x61, 0x43]),\n // \"OggS\" string literal in hex\n 'ogg': toUint8([0x4f, 0x67, 0x67, 0x53]),\n // ac-3 sync byte, also works for ec-3 as that is simply a codec\n // of ac-3\n 'ac3': toUint8([0x0b, 0x77]),\n // \"RIFF\" string literal in hex used for wav and avi\n 'riff': toUint8([0x52, 0x49, 0x46, 0x46]),\n // \"AVI\" string literal in hex\n 'avi': toUint8([0x41, 0x56, 0x49]),\n // \"WAVE\" string literal in hex\n 'wav': toUint8([0x57, 0x41, 0x56, 0x45]),\n // \"ftyp3g\" string literal in hex\n '3gp': toUint8([0x66, 0x74, 0x79, 0x70, 0x33, 0x67]),\n // \"ftyp\" string literal in hex\n 'mp4': toUint8([0x66, 0x74, 0x79, 0x70]),\n // \"styp\" string literal in hex\n 'fmp4': toUint8([0x73, 0x74, 0x79, 0x70]),\n // \"ftypqt\" string literal in hex\n 'mov': toUint8([0x66, 0x74, 0x79, 0x70, 0x71, 0x74]),\n // moov string literal in hex\n 'moov': toUint8([0x6D, 0x6F, 0x6F, 0x76]),\n // moof string literal in hex\n 'moof': toUint8([0x6D, 0x6F, 0x6F, 0x66])\n };\n var _isLikely = {\n aac: function aac(bytes) {\n var offset = getId3Offset(bytes);\n return bytesMatch(bytes, [0xFF, 0x10], {\n offset: offset,\n mask: [0xFF, 0x16]\n });\n },\n mp3: function mp3(bytes) {\n var offset = getId3Offset(bytes);\n return bytesMatch(bytes, [0xFF, 0x02], {\n offset: offset,\n mask: [0xFF, 0x06]\n });\n },\n webm: function webm(bytes) {\n var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is webm\n\n return bytesMatch(docType, CONSTANTS.webm);\n },\n mkv: function mkv(bytes) {\n var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is matroska\n\n return bytesMatch(docType, CONSTANTS.matroska);\n },\n mp4: function mp4(bytes) {\n // if this file is another base media file format, it is not mp4\n if (_isLikely['3gp'](bytes) || _isLikely.mov(bytes)) {\n return false;\n } // if this file starts with a ftyp or styp box its mp4\n\n if (bytesMatch(bytes, CONSTANTS.mp4, {\n offset: 4\n }) || bytesMatch(bytes, CONSTANTS.fmp4, {\n offset: 4\n })) {\n return true;\n } // if this file starts with a moof/moov box its mp4\n\n if (bytesMatch(bytes, CONSTANTS.moof, {\n offset: 4\n }) || bytesMatch(bytes, CONSTANTS.moov, {\n offset: 4\n })) {\n return true;\n }\n },\n mov: function mov(bytes) {\n return bytesMatch(bytes, CONSTANTS.mov, {\n offset: 4\n });\n },\n '3gp': function gp(bytes) {\n return bytesMatch(bytes, CONSTANTS['3gp'], {\n offset: 4\n });\n },\n ac3: function ac3(bytes) {\n var offset = getId3Offset(bytes);\n return bytesMatch(bytes, CONSTANTS.ac3, {\n offset: offset\n });\n },\n ts: function ts(bytes) {\n if (bytes.length < 189 && bytes.length >= 1) {\n return bytes[0] === 0x47;\n }\n var i = 0; // check the first 376 bytes for two matching sync bytes\n\n while (i + 188 < bytes.length && i < 188) {\n if (bytes[i] === 0x47 && bytes[i + 188] === 0x47) {\n return true;\n }\n i += 1;\n }\n return false;\n },\n flac: function flac(bytes) {\n var offset = getId3Offset(bytes);\n return bytesMatch(bytes, CONSTANTS.flac, {\n offset: offset\n });\n },\n ogg: function ogg(bytes) {\n return bytesMatch(bytes, CONSTANTS.ogg);\n },\n avi: function avi(bytes) {\n return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.avi, {\n offset: 8\n });\n },\n wav: function wav(bytes) {\n return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.wav, {\n offset: 8\n });\n },\n 'h264': function h264(bytes) {\n // find seq_parameter_set_rbsp\n return findH264Nal(bytes, 7, 3).length;\n },\n 'h265': function h265(bytes) {\n // find video_parameter_set_rbsp or seq_parameter_set_rbsp\n return findH265Nal(bytes, [32, 33], 3).length;\n }\n }; // get all the isLikely functions\n // but make sure 'ts' is above h264 and h265\n // but below everything else as it is the least specific\n\n var isLikelyTypes = Object.keys(_isLikely) // remove ts, h264, h265\n .filter(function (t) {\n return t !== 'ts' && t !== 'h264' && t !== 'h265';\n }) // add it back to the bottom\n .concat(['ts', 'h264', 'h265']); // make sure we are dealing with uint8 data.\n\n isLikelyTypes.forEach(function (type) {\n var isLikelyFn = _isLikely[type];\n _isLikely[type] = function (bytes) {\n return isLikelyFn(toUint8(bytes));\n };\n }); // export after wrapping\n\n var isLikely = _isLikely; // A useful list of file signatures can be found here\n // https://en.wikipedia.org/wiki/List_of_file_signatures\n\n var detectContainerForBytes = function detectContainerForBytes(bytes) {\n bytes = toUint8(bytes);\n for (var i = 0; i < isLikelyTypes.length; i++) {\n var type = isLikelyTypes[i];\n if (isLikely[type](bytes)) {\n return type;\n }\n }\n return '';\n }; // fmp4 is not a container\n\n var isLikelyFmp4MediaSegment = function isLikelyFmp4MediaSegment(bytes) {\n return findBox(bytes, ['moof']).length > 0;\n };\n\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n var ONE_SECOND_IN_TS = 90000,\n // 90kHz clock\n secondsToVideoTs,\n secondsToAudioTs,\n videoTsToSeconds,\n audioTsToSeconds,\n audioTsToVideoTs,\n videoTsToAudioTs,\n metadataTsToSeconds;\n secondsToVideoTs = function (seconds) {\n return seconds * ONE_SECOND_IN_TS;\n };\n secondsToAudioTs = function (seconds, sampleRate) {\n return seconds * sampleRate;\n };\n videoTsToSeconds = function (timestamp) {\n return timestamp / ONE_SECOND_IN_TS;\n };\n audioTsToSeconds = function (timestamp, sampleRate) {\n return timestamp / sampleRate;\n };\n audioTsToVideoTs = function (timestamp, sampleRate) {\n return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n };\n videoTsToAudioTs = function (timestamp, sampleRate) {\n return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n };\n\n /**\n * Adjust ID3 tag or caption timing information by the timeline pts values\n * (if keepOriginalTimestamps is false) and convert to seconds\n */\n metadataTsToSeconds = function (timestamp, timelineStartPts, keepOriginalTimestamps) {\n return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n };\n var clock = {\n ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,\n secondsToVideoTs: secondsToVideoTs,\n secondsToAudioTs: secondsToAudioTs,\n videoTsToSeconds: videoTsToSeconds,\n audioTsToSeconds: audioTsToSeconds,\n audioTsToVideoTs: audioTsToVideoTs,\n videoTsToAudioTs: videoTsToAudioTs,\n metadataTsToSeconds: metadataTsToSeconds\n };\n var clock_1 = clock.ONE_SECOND_IN_TS;\n\n /*! @name @videojs/http-streaming @version 3.0.2 @license Apache-2.0 */\n\n /**\n * @file resolve-url.js - Handling how URLs are resolved and manipulated\n */\n const resolveUrl = resolveUrl$2;\n /**\n * If the xhr request was redirected, return the responseURL, otherwise,\n * return the original url.\n *\n * @api private\n *\n * @param {string} url - an url being requested\n * @param {XMLHttpRequest} req - xhr request result\n *\n * @return {string}\n */\n\n const resolveManifestRedirect = (url, req) => {\n // To understand how the responseURL below is set and generated:\n // - https://fetch.spec.whatwg.org/#concept-response-url\n // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling\n if (req && req.responseURL && url !== req.responseURL) {\n return req.responseURL;\n }\n return url;\n };\n const logger = source => {\n if (videojs.log.debug) {\n return videojs.log.debug.bind(videojs, 'VHS:', `${source} >`);\n }\n return function () {};\n };\n\n /**\n * Provides a compatibility layer between Video.js 7 and 8 API changes for VHS.\n */\n /**\n * Delegates to videojs.obj.merge (Video.js 8) or\n * videojs.mergeOptions (Video.js 7).\n */\n\n function merge(...args) {\n const context = videojs.obj || videojs;\n const fn = context.merge || context.mergeOptions;\n return fn.apply(context, args);\n }\n /**\n * Delegates to videojs.time.createTimeRanges (Video.js 8) or\n * videojs.createTimeRanges (Video.js 7).\n */\n\n function createTimeRanges(...args) {\n const context = videojs.time || videojs;\n const fn = context.createTimeRanges || context.createTimeRanges;\n return fn.apply(context, args);\n }\n\n /**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n\n const TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range\n // can be misleading because of precision differences or when the current media has poorly\n // aligned audio and video, which can cause values to be slightly off from what you would\n // expect. This value is what we consider to be safe to use in such comparisons to account\n // for these scenarios.\n\n const SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n const filterRanges = function (timeRanges, predicate) {\n const results = [];\n let i;\n if (timeRanges && timeRanges.length) {\n // Search for ranges that match the predicate\n for (i = 0; i < timeRanges.length; i++) {\n if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n results.push([timeRanges.start(i), timeRanges.end(i)]);\n }\n }\n }\n return createTimeRanges(results);\n };\n /**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n *\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object\n */\n\n const findRange = function (buffered, time) {\n return filterRanges(buffered, function (start, end) {\n return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;\n });\n };\n /**\n * Returns the TimeRanges that begin later than the specified time.\n *\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object.\n */\n\n const findNextRange = function (timeRanges, time) {\n return filterRanges(timeRanges, function (start) {\n return start - TIME_FUDGE_FACTOR >= time;\n });\n };\n /**\n * Returns gaps within a list of TimeRanges\n *\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\n\n const findGaps = function (buffered) {\n if (buffered.length < 2) {\n return createTimeRanges();\n }\n const ranges = [];\n for (let i = 1; i < buffered.length; i++) {\n const start = buffered.end(i - 1);\n const end = buffered.start(i);\n ranges.push([start, end]);\n }\n return createTimeRanges(ranges);\n };\n /**\n * Calculate the intersection of two TimeRanges\n *\n * @param {TimeRanges} bufferA\n * @param {TimeRanges} bufferB\n * @return {TimeRanges} The interesection of `bufferA` with `bufferB`\n */\n\n const bufferIntersection = function (bufferA, bufferB) {\n let start = null;\n let end = null;\n let arity = 0;\n const extents = [];\n const ranges = [];\n if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {\n return createTimeRanges();\n } // Handle the case where we have both buffers and create an\n // intersection of the two\n\n let count = bufferA.length; // A) Gather up all start and end times\n\n while (count--) {\n extents.push({\n time: bufferA.start(count),\n type: 'start'\n });\n extents.push({\n time: bufferA.end(count),\n type: 'end'\n });\n }\n count = bufferB.length;\n while (count--) {\n extents.push({\n time: bufferB.start(count),\n type: 'start'\n });\n extents.push({\n time: bufferB.end(count),\n type: 'end'\n });\n } // B) Sort them by time\n\n extents.sort(function (a, b) {\n return a.time - b.time;\n }); // C) Go along one by one incrementing arity for start and decrementing\n // arity for ends\n\n for (count = 0; count < extents.length; count++) {\n if (extents[count].type === 'start') {\n arity++; // D) If arity is ever incremented to 2 we are entering an\n // overlapping range\n\n if (arity === 2) {\n start = extents[count].time;\n }\n } else if (extents[count].type === 'end') {\n arity--; // E) If arity is ever decremented to 1 we leaving an\n // overlapping range\n\n if (arity === 1) {\n end = extents[count].time;\n }\n } // F) Record overlapping ranges\n\n if (start !== null && end !== null) {\n ranges.push([start, end]);\n start = null;\n end = null;\n }\n }\n return createTimeRanges(ranges);\n };\n /**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @return {string} a human readable string\n */\n\n const printableRange = range => {\n const strArr = [];\n if (!range || !range.length) {\n return '';\n }\n for (let i = 0; i < range.length; i++) {\n strArr.push(range.start(i) + ' => ' + range.end(i));\n }\n return strArr.join(', ');\n };\n /**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n * The state of the buffer\n * @param {Numnber} currentTime\n * The current time of the player\n * @param {number} playbackRate\n * The current playback rate of the player. Defaults to 1.\n * @return {number}\n * Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\n\n const timeUntilRebuffer = function (buffered, currentTime, playbackRate = 1) {\n const bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n return (bufferedEnd - currentTime) / playbackRate;\n };\n /**\n * Converts a TimeRanges object into an array representation\n *\n * @param {TimeRanges} timeRanges\n * @return {Array}\n */\n\n const timeRangesToArray = timeRanges => {\n const timeRangesList = [];\n for (let i = 0; i < timeRanges.length; i++) {\n timeRangesList.push({\n start: timeRanges.start(i),\n end: timeRanges.end(i)\n });\n }\n return timeRangesList;\n };\n /**\n * Determines if two time range objects are different.\n *\n * @param {TimeRange} a\n * the first time range object to check\n *\n * @param {TimeRange} b\n * the second time range object to check\n *\n * @return {Boolean}\n * Whether the time range objects differ\n */\n\n const isRangeDifferent = function (a, b) {\n // same object\n if (a === b) {\n return false;\n } // one or the other is undefined\n\n if (!a && b || !b && a) {\n return true;\n } // length is different\n\n if (a.length !== b.length) {\n return true;\n } // see if any start/end pair is different\n\n for (let i = 0; i < a.length; i++) {\n if (a.start(i) !== b.start(i) || a.end(i) !== b.end(i)) {\n return true;\n }\n } // if the length and every pair is the same\n // this is the same time range\n\n return false;\n };\n const lastBufferedEnd = function (a) {\n if (!a || !a.length || !a.end) {\n return;\n }\n return a.end(a.length - 1);\n };\n /**\n * A utility function to add up the amount of time in a timeRange\n * after a specified startTime.\n * ie:[[0, 10], [20, 40], [50, 60]] with a startTime 0\n * would return 40 as there are 40s seconds after 0 in the timeRange\n *\n * @param {TimeRange} range\n * The range to check against\n * @param {number} startTime\n * The time in the time range that you should start counting from\n *\n * @return {number}\n * The number of seconds in the buffer passed the specified time.\n */\n\n const timeAheadOf = function (range, startTime) {\n let time = 0;\n if (!range || !range.length) {\n return time;\n }\n for (let i = 0; i < range.length; i++) {\n const start = range.start(i);\n const end = range.end(i); // startTime is after this range entirely\n\n if (startTime > end) {\n continue;\n } // startTime is within this range\n\n if (startTime > start && startTime <= end) {\n time += end - startTime;\n continue;\n } // startTime is before this range.\n\n time += end - start;\n }\n return time;\n };\n\n /**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\n /**\n * Get the duration of a segment, with special cases for\n * llhls segments that do not have a duration yet.\n *\n * @param {Object} playlist\n * the playlist that the segment belongs to.\n * @param {Object} segment\n * the segment to get a duration for.\n *\n * @return {number}\n * the segment duration\n */\n\n const segmentDurationWithParts = (playlist, segment) => {\n // if this isn't a preload segment\n // then we will have a segment duration that is accurate.\n if (!segment.preload) {\n return segment.duration;\n } // otherwise we have to add up parts and preload hints\n // to get an up to date duration.\n\n let result = 0;\n (segment.parts || []).forEach(function (p) {\n result += p.duration;\n }); // for preload hints we have to use partTargetDuration\n // as they won't even have a duration yet.\n\n (segment.preloadHints || []).forEach(function (p) {\n if (p.type === 'PART') {\n result += playlist.partTargetDuration;\n }\n });\n return result;\n };\n /**\n * A function to get a combined list of parts and segments with durations\n * and indexes.\n *\n * @param {Playlist} playlist the playlist to get the list for.\n *\n * @return {Array} The part/segment list.\n */\n\n const getPartsAndSegments = playlist => (playlist.segments || []).reduce((acc, segment, si) => {\n if (segment.parts) {\n segment.parts.forEach(function (part, pi) {\n acc.push({\n duration: part.duration,\n segmentIndex: si,\n partIndex: pi,\n part,\n segment\n });\n });\n } else {\n acc.push({\n duration: segment.duration,\n segmentIndex: si,\n partIndex: null,\n segment,\n part: null\n });\n }\n return acc;\n }, []);\n const getLastParts = media => {\n const lastSegment = media.segments && media.segments.length && media.segments[media.segments.length - 1];\n return lastSegment && lastSegment.parts || [];\n };\n const getKnownPartCount = ({\n preloadSegment\n }) => {\n if (!preloadSegment) {\n return;\n }\n const {\n parts,\n preloadHints\n } = preloadSegment;\n let partCount = (preloadHints || []).reduce((count, hint) => count + (hint.type === 'PART' ? 1 : 0), 0);\n partCount += parts && parts.length ? parts.length : 0;\n return partCount;\n };\n /**\n * Get the number of seconds to delay from the end of a\n * live playlist.\n *\n * @param {Playlist} main the main playlist\n * @param {Playlist} media the media playlist\n * @return {number} the hold back in seconds.\n */\n\n const liveEdgeDelay = (main, media) => {\n if (media.endList) {\n return 0;\n } // dash suggestedPresentationDelay trumps everything\n\n if (main && main.suggestedPresentationDelay) {\n return main.suggestedPresentationDelay;\n }\n const hasParts = getLastParts(media).length > 0; // look for \"part\" delays from ll-hls first\n\n if (hasParts && media.serverControl && media.serverControl.partHoldBack) {\n return media.serverControl.partHoldBack;\n } else if (hasParts && media.partTargetDuration) {\n return media.partTargetDuration * 3; // finally look for full segment delays\n } else if (media.serverControl && media.serverControl.holdBack) {\n return media.serverControl.holdBack;\n } else if (media.targetDuration) {\n return media.targetDuration * 3;\n }\n return 0;\n };\n /**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\n const backwardDuration = function (playlist, endSequence) {\n let result = 0;\n let i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following\n // the interval, use it\n\n let segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline\n // information that is earlier than endSequence\n\n if (segment) {\n if (typeof segment.start !== 'undefined') {\n return {\n result: segment.start,\n precise: true\n };\n }\n if (typeof segment.end !== 'undefined') {\n return {\n result: segment.end - segment.duration,\n precise: true\n };\n }\n }\n while (i--) {\n segment = playlist.segments[i];\n if (typeof segment.end !== 'undefined') {\n return {\n result: result + segment.end,\n precise: true\n };\n }\n result += segmentDurationWithParts(playlist, segment);\n if (typeof segment.start !== 'undefined') {\n return {\n result: result + segment.start,\n precise: true\n };\n }\n }\n return {\n result,\n precise: false\n };\n };\n /**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {number} endSequence the mediaSequence to stop walking on\n */\n\n const forwardDuration = function (playlist, endSequence) {\n let result = 0;\n let segment;\n let i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline\n // information\n\n for (; i < playlist.segments.length; i++) {\n segment = playlist.segments[i];\n if (typeof segment.start !== 'undefined') {\n return {\n result: segment.start - result,\n precise: true\n };\n }\n result += segmentDurationWithParts(playlist, segment);\n if (typeof segment.end !== 'undefined') {\n return {\n result: segment.end - result,\n precise: true\n };\n }\n } // indicate we didn't find a useful duration estimate\n\n return {\n result: -1,\n precise: false\n };\n };\n /**\n * Calculate the media duration from the segments associated with a\n * playlist. The duration of a subinterval of the available segments\n * may be calculated by specifying an end index.\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} endSequence an exclusive upper boundary\n * for the playlist. Defaults to playlist length.\n * @param {number} expired the amount of time that has dropped\n * off the front of the playlist in a live scenario\n * @return {number} the duration between the first available segment\n * and end index.\n */\n\n const intervalDuration = function (playlist, endSequence, expired) {\n if (typeof endSequence === 'undefined') {\n endSequence = playlist.mediaSequence + playlist.segments.length;\n }\n if (endSequence < playlist.mediaSequence) {\n return 0;\n } // do a backward walk to estimate the duration\n\n const backward = backwardDuration(playlist, endSequence);\n if (backward.precise) {\n // if we were able to base our duration estimate on timing\n // information provided directly from the Media Source, return\n // it\n return backward.result;\n } // walk forward to see if a precise duration estimate can be made\n // that way\n\n const forward = forwardDuration(playlist, endSequence);\n if (forward.precise) {\n // we found a segment that has been buffered and so it's\n // position is known precisely\n return forward.result;\n } // return the less-precise, playlist-based duration estimate\n\n return backward.result + expired;\n };\n /**\n * Calculates the duration of a playlist. If a start and end index\n * are specified, the duration will be for the subset of the media\n * timeline between those two indices. The total duration for live\n * playlists is always Infinity.\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} endSequence an exclusive upper\n * boundary for the playlist. Defaults to the playlist media\n * sequence number plus its length.\n * @param {number=} expired the amount of time that has\n * dropped off the front of the playlist in a live scenario\n * @return {number} the duration between the start index and end\n * index.\n */\n\n const duration = function (playlist, endSequence, expired) {\n if (!playlist) {\n return 0;\n }\n if (typeof expired !== 'number') {\n expired = 0;\n } // if a slice of the total duration is not requested, use\n // playlist-level duration indicators when they're present\n\n if (typeof endSequence === 'undefined') {\n // if present, use the duration specified in the playlist\n if (playlist.totalDuration) {\n return playlist.totalDuration;\n } // duration should be Infinity for live playlists\n\n if (!playlist.endList) {\n return window.Infinity;\n }\n } // calculate the total duration based on the segment durations\n\n return intervalDuration(playlist, endSequence, expired);\n };\n /**\n * Calculate the time between two indexes in the current playlist\n * neight the start- nor the end-index need to be within the current\n * playlist in which case, the targetDuration of the playlist is used\n * to approximate the durations of the segments\n *\n * @param {Array} options.durationList list to iterate over for durations.\n * @param {number} options.defaultDuration duration to use for elements before or after the durationList\n * @param {number} options.startIndex partsAndSegments index to start\n * @param {number} options.endIndex partsAndSegments index to end.\n * @return {number} the number of seconds between startIndex and endIndex\n */\n\n const sumDurations = function ({\n defaultDuration,\n durationList,\n startIndex,\n endIndex\n }) {\n let durations = 0;\n if (startIndex > endIndex) {\n [startIndex, endIndex] = [endIndex, startIndex];\n }\n if (startIndex < 0) {\n for (let i = startIndex; i < Math.min(0, endIndex); i++) {\n durations += defaultDuration;\n }\n startIndex = 0;\n }\n for (let i = startIndex; i < endIndex; i++) {\n durations += durationList[i].duration;\n }\n return durations;\n };\n /**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} expired the amount of time that has\n * dropped off the front of the playlist in a live scenario\n * @param {boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n * playlist end calculation should consider the safe live end\n * (truncate the playlist end by three segments). This is normally\n * used for calculating the end of the playlist's seekable range.\n * This takes into account the value of liveEdgePadding.\n * Setting liveEdgePadding to 0 is equivalent to setting this to false.\n * @param {number} liveEdgePadding a number indicating how far from the end of the playlist we should be in seconds.\n * If this is provided, it is used in the safe live end calculation.\n * Setting useSafeLiveEnd=false or liveEdgePadding=0 are equivalent.\n * Corresponds to suggestedPresentationDelay in DASH manifests.\n * @return {number} the end time of playlist\n * @function playlistEnd\n */\n\n const playlistEnd = function (playlist, expired, useSafeLiveEnd, liveEdgePadding) {\n if (!playlist || !playlist.segments) {\n return null;\n }\n if (playlist.endList) {\n return duration(playlist);\n }\n if (expired === null) {\n return null;\n }\n expired = expired || 0;\n let lastSegmentEndTime = intervalDuration(playlist, playlist.mediaSequence + playlist.segments.length, expired);\n if (useSafeLiveEnd) {\n liveEdgePadding = typeof liveEdgePadding === 'number' ? liveEdgePadding : liveEdgeDelay(null, playlist);\n lastSegmentEndTime -= liveEdgePadding;\n } // don't return a time less than zero\n\n return Math.max(0, lastSegmentEndTime);\n };\n /**\n * Calculates the interval of time that is currently seekable in a\n * playlist. The returned time ranges are relative to the earliest\n * moment in the specified playlist that is still available. A full\n * seekable implementation for live streams would need to offset\n * these values by the duration of content that has expired from the\n * stream.\n *\n * @param {Object} playlist a media playlist object\n * dropped off the front of the playlist in a live scenario\n * @param {number=} expired the amount of time that has\n * dropped off the front of the playlist in a live scenario\n * @param {number} liveEdgePadding how far from the end of the playlist we should be in seconds.\n * Corresponds to suggestedPresentationDelay in DASH manifests.\n * @return {TimeRanges} the periods of time that are valid targets\n * for seeking\n */\n\n const seekable = function (playlist, expired, liveEdgePadding) {\n const useSafeLiveEnd = true;\n const seekableStart = expired || 0;\n const seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding);\n if (seekableEnd === null) {\n return createTimeRanges();\n }\n return createTimeRanges(seekableStart, seekableEnd);\n };\n /**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} options.playlist the media playlist to query\n * @param {number} options.currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {number} options.startTime the time when the segment/part starts\n * @param {number} options.startingSegmentIndex the segment index to start looking at.\n * @param {number?} [options.startingPartIndex] the part index to look at within the segment.\n *\n * @return {Object} an object with partIndex, segmentIndex, and startTime.\n */\n\n const getMediaInfoForTime = function ({\n playlist,\n currentTime,\n startingSegmentIndex,\n startingPartIndex,\n startTime,\n exactManifestTimings\n }) {\n let time = currentTime - startTime;\n const partsAndSegments = getPartsAndSegments(playlist);\n let startIndex = 0;\n for (let i = 0; i < partsAndSegments.length; i++) {\n const partAndSegment = partsAndSegments[i];\n if (startingSegmentIndex !== partAndSegment.segmentIndex) {\n continue;\n } // skip this if part index does not match.\n\n if (typeof startingPartIndex === 'number' && typeof partAndSegment.partIndex === 'number' && startingPartIndex !== partAndSegment.partIndex) {\n continue;\n }\n startIndex = i;\n break;\n }\n if (time < 0) {\n // Walk backward from startIndex in the playlist, adding durations\n // until we find a segment that contains `time` and return it\n if (startIndex > 0) {\n for (let i = startIndex - 1; i >= 0; i--) {\n const partAndSegment = partsAndSegments[i];\n time += partAndSegment.duration;\n if (exactManifestTimings) {\n if (time < 0) {\n continue;\n }\n } else if (time + TIME_FUDGE_FACTOR <= 0) {\n continue;\n }\n return {\n partIndex: partAndSegment.partIndex,\n segmentIndex: partAndSegment.segmentIndex,\n startTime: startTime - sumDurations({\n defaultDuration: playlist.targetDuration,\n durationList: partsAndSegments,\n startIndex,\n endIndex: i\n })\n };\n }\n } // We were unable to find a good segment within the playlist\n // so select the first segment\n\n return {\n partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n startTime: currentTime\n };\n } // When startIndex is negative, we first walk forward to first segment\n // adding target durations. If we \"run out of time\" before getting to\n // the first segment, return the first segment\n\n if (startIndex < 0) {\n for (let i = startIndex; i < 0; i++) {\n time -= playlist.targetDuration;\n if (time < 0) {\n return {\n partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n startTime: currentTime\n };\n }\n }\n startIndex = 0;\n } // Walk forward from startIndex in the playlist, subtracting durations\n // until we find a segment that contains `time` and return it\n\n for (let i = startIndex; i < partsAndSegments.length; i++) {\n const partAndSegment = partsAndSegments[i];\n time -= partAndSegment.duration;\n if (exactManifestTimings) {\n if (time > 0) {\n continue;\n }\n } else if (time - TIME_FUDGE_FACTOR >= 0) {\n continue;\n }\n return {\n partIndex: partAndSegment.partIndex,\n segmentIndex: partAndSegment.segmentIndex,\n startTime: startTime + sumDurations({\n defaultDuration: playlist.targetDuration,\n durationList: partsAndSegments,\n startIndex,\n endIndex: i\n })\n };\n } // We are out of possible candidates so load the last one...\n\n return {\n segmentIndex: partsAndSegments[partsAndSegments.length - 1].segmentIndex,\n partIndex: partsAndSegments[partsAndSegments.length - 1].partIndex,\n startTime: currentTime\n };\n };\n /**\n * Check whether the playlist is excluded or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is excluded or not\n * @function isExcluded\n */\n\n const isExcluded = function (playlist) {\n return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n };\n /**\n * Check whether the playlist is compatible with current playback configuration or has\n * been excluded permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\n\n const isIncompatible = function (playlist) {\n return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n };\n /**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\n\n const isEnabled = function (playlist) {\n const excluded = isExcluded(playlist);\n return !playlist.disabled && !excluded;\n };\n /**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\n\n const isDisabled = function (playlist) {\n return playlist.disabled;\n };\n /**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {boolean} true if it's an AES encrypted HLS stream\n */\n\n const isAes = function (media) {\n for (let i = 0; i < media.segments.length; i++) {\n if (media.segments[i].key) {\n return true;\n }\n }\n return false;\n };\n /**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {string} attr\n * Attribute to check for\n * @param {Object} playlist\n * The media playlist object\n * @return {boolean}\n * Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\n\n const hasAttribute = function (attr, playlist) {\n return playlist.attributes && playlist.attributes[attr];\n };\n /**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {number} segmentDuration\n * Duration of requested segment\n * @param {number} bandwidth\n * Current measured bandwidth of the player\n * @param {Object} playlist\n * The media playlist object\n * @param {number=} bytesReceived\n * Number of bytes already received for the request. Defaults to 0\n * @return {number|NaN}\n * The estimated time to request the segment. NaN if bandwidth information for\n * the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\n\n const estimateSegmentRequestTime = function (segmentDuration, bandwidth, playlist, bytesReceived = 0) {\n if (!hasAttribute('BANDWIDTH', playlist)) {\n return NaN;\n }\n const size = segmentDuration * playlist.attributes.BANDWIDTH;\n return (size - bytesReceived * 8) / bandwidth;\n };\n /*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\n\n const isLowestEnabledRendition = (main, media) => {\n if (main.playlists.length === 1) {\n return true;\n }\n const currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n return main.playlists.filter(playlist => {\n if (!isEnabled(playlist)) {\n return false;\n }\n return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n }).length === 0;\n };\n const playlistMatch = (a, b) => {\n // both playlits are null\n // or only one playlist is non-null\n // no match\n if (!a && !b || !a && b || a && !b) {\n return false;\n } // playlist objects are the same, match\n\n if (a === b) {\n return true;\n } // first try to use id as it should be the most\n // accurate\n\n if (a.id && b.id && a.id === b.id) {\n return true;\n } // next try to use reslovedUri as it should be the\n // second most accurate.\n\n if (a.resolvedUri && b.resolvedUri && a.resolvedUri === b.resolvedUri) {\n return true;\n } // finally try to use uri as it should be accurate\n // but might miss a few cases for relative uris\n\n if (a.uri && b.uri && a.uri === b.uri) {\n return true;\n }\n return false;\n };\n const someAudioVariant = function (main, callback) {\n const AUDIO = main && main.mediaGroups && main.mediaGroups.AUDIO || {};\n let found = false;\n for (const groupName in AUDIO) {\n for (const label in AUDIO[groupName]) {\n found = callback(AUDIO[groupName][label]);\n if (found) {\n break;\n }\n }\n if (found) {\n break;\n }\n }\n return !!found;\n };\n const isAudioOnly = main => {\n // we are audio only if we have no main playlists but do\n // have media group playlists.\n if (!main || !main.playlists || !main.playlists.length) {\n // without audio variants or playlists this\n // is not an audio only main.\n const found = someAudioVariant(main, variant => variant.playlists && variant.playlists.length || variant.uri);\n return found;\n } // if every playlist has only an audio codec it is audio only\n\n for (let i = 0; i < main.playlists.length; i++) {\n const playlist = main.playlists[i];\n const CODECS = playlist.attributes && playlist.attributes.CODECS; // all codecs are audio, this is an audio playlist.\n\n if (CODECS && CODECS.split(',').every(c => isAudioCodec(c))) {\n continue;\n } // playlist is in an audio group it is audio only\n\n const found = someAudioVariant(main, variant => playlistMatch(playlist, variant));\n if (found) {\n continue;\n } // if we make it here this playlist isn't audio and we\n // are not audio only\n\n return false;\n } // if we make it past every playlist without returning, then\n // this is an audio only playlist.\n\n return true;\n }; // exports\n\n var Playlist = {\n liveEdgeDelay,\n duration,\n seekable,\n getMediaInfoForTime,\n isEnabled,\n isDisabled,\n isExcluded,\n isIncompatible,\n playlistEnd,\n isAes,\n hasAttribute,\n estimateSegmentRequestTime,\n isLowestEnabledRendition,\n isAudioOnly,\n playlistMatch,\n segmentDurationWithParts\n };\n const {\n log\n } = videojs;\n const createPlaylistID = (index, uri) => {\n return `${index}-${uri}`;\n }; // default function for creating a group id\n\n const groupID = (type, group, label) => {\n return `placeholder-uri-${type}-${group}-${label}`;\n };\n /**\n * Parses a given m3u8 playlist\n *\n * @param {Function} [onwarn]\n * a function to call when the parser triggers a warning event.\n * @param {Function} [oninfo]\n * a function to call when the parser triggers an info event.\n * @param {string} manifestString\n * The downloaded manifest string\n * @param {Object[]} [customTagParsers]\n * An array of custom tag parsers for the m3u8-parser instance\n * @param {Object[]} [customTagMappers]\n * An array of custom tag mappers for the m3u8-parser instance\n * @param {boolean} [llhls]\n * Whether to keep ll-hls features in the manifest after parsing.\n * @return {Object}\n * The manifest object\n */\n\n const parseManifest = ({\n onwarn,\n oninfo,\n manifestString,\n customTagParsers = [],\n customTagMappers = [],\n llhls\n }) => {\n const parser = new Parser();\n if (onwarn) {\n parser.on('warn', onwarn);\n }\n if (oninfo) {\n parser.on('info', oninfo);\n }\n customTagParsers.forEach(customParser => parser.addParser(customParser));\n customTagMappers.forEach(mapper => parser.addTagMapper(mapper));\n parser.push(manifestString);\n parser.end();\n const manifest = parser.manifest; // remove llhls features from the parsed manifest\n // if we don't want llhls support.\n\n if (!llhls) {\n ['preloadSegment', 'skip', 'serverControl', 'renditionReports', 'partInf', 'partTargetDuration'].forEach(function (k) {\n if (manifest.hasOwnProperty(k)) {\n delete manifest[k];\n }\n });\n if (manifest.segments) {\n manifest.segments.forEach(function (segment) {\n ['parts', 'preloadHints'].forEach(function (k) {\n if (segment.hasOwnProperty(k)) {\n delete segment[k];\n }\n });\n });\n }\n }\n if (!manifest.targetDuration) {\n let targetDuration = 10;\n if (manifest.segments && manifest.segments.length) {\n targetDuration = manifest.segments.reduce((acc, s) => Math.max(acc, s.duration), 0);\n }\n if (onwarn) {\n onwarn(`manifest has no targetDuration defaulting to ${targetDuration}`);\n }\n manifest.targetDuration = targetDuration;\n }\n const parts = getLastParts(manifest);\n if (parts.length && !manifest.partTargetDuration) {\n const partTargetDuration = parts.reduce((acc, p) => Math.max(acc, p.duration), 0);\n if (onwarn) {\n onwarn(`manifest has no partTargetDuration defaulting to ${partTargetDuration}`);\n log.error('LL-HLS manifest has parts but lacks required #EXT-X-PART-INF:PART-TARGET value. See https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-09#section-4.4.3.7. Playback is not guaranteed.');\n }\n manifest.partTargetDuration = partTargetDuration;\n }\n return manifest;\n };\n /**\n * Loops through all supported media groups in main and calls the provided\n * callback for each group\n *\n * @param {Object} main\n * The parsed main manifest object\n * @param {Function} callback\n * Callback to call for each media group\n */\n\n const forEachMediaGroup = (main, callback) => {\n if (!main.mediaGroups) {\n return;\n }\n ['AUDIO', 'SUBTITLES'].forEach(mediaType => {\n if (!main.mediaGroups[mediaType]) {\n return;\n }\n for (const groupKey in main.mediaGroups[mediaType]) {\n for (const labelKey in main.mediaGroups[mediaType][groupKey]) {\n const mediaProperties = main.mediaGroups[mediaType][groupKey][labelKey];\n callback(mediaProperties, mediaType, groupKey, labelKey);\n }\n }\n });\n };\n /**\n * Adds properties and attributes to the playlist to keep consistent functionality for\n * playlists throughout VHS.\n *\n * @param {Object} config\n * Arguments object\n * @param {Object} config.playlist\n * The media playlist\n * @param {string} [config.uri]\n * The uri to the media playlist (if media playlist is not from within a main\n * playlist)\n * @param {string} id\n * ID to use for the playlist\n */\n\n const setupMediaPlaylist = ({\n playlist,\n uri,\n id\n }) => {\n playlist.id = id;\n playlist.playlistErrors_ = 0;\n if (uri) {\n // For media playlists, m3u8-parser does not have access to a URI, as HLS media\n // playlists do not contain their own source URI, but one is needed for consistency in\n // VHS.\n playlist.uri = uri;\n } // For HLS main playlists, even though certain attributes MUST be defined, the\n // stream may still be played without them.\n // For HLS media playlists, m3u8-parser does not attach an attributes object to the\n // manifest.\n //\n // To avoid undefined reference errors through the project, and make the code easier\n // to write/read, add an empty attributes object for these cases.\n\n playlist.attributes = playlist.attributes || {};\n };\n /**\n * Adds ID, resolvedUri, and attributes properties to each playlist of the main, where\n * necessary. In addition, creates playlist IDs for each playlist and adds playlist ID to\n * playlist references to the playlists array.\n *\n * @param {Object} main\n * The main playlist\n */\n\n const setupMediaPlaylists = main => {\n let i = main.playlists.length;\n while (i--) {\n const playlist = main.playlists[i];\n setupMediaPlaylist({\n playlist,\n id: createPlaylistID(i, playlist.uri)\n });\n playlist.resolvedUri = resolveUrl(main.uri, playlist.uri);\n main.playlists[playlist.id] = playlist; // URI reference added for backwards compatibility\n\n main.playlists[playlist.uri] = playlist; // Although the spec states an #EXT-X-STREAM-INF tag MUST have a BANDWIDTH attribute,\n // the stream can be played without it. Although an attributes property may have been\n // added to the playlist to prevent undefined references, issue a warning to fix the\n // manifest.\n\n if (!playlist.attributes.BANDWIDTH) {\n log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n }\n }\n };\n /**\n * Adds resolvedUri properties to each media group.\n *\n * @param {Object} main\n * The main playlist\n */\n\n const resolveMediaGroupUris = main => {\n forEachMediaGroup(main, properties => {\n if (properties.uri) {\n properties.resolvedUri = resolveUrl(main.uri, properties.uri);\n }\n });\n };\n /**\n * Creates a main playlist wrapper to insert a sole media playlist into.\n *\n * @param {Object} media\n * Media playlist\n * @param {string} uri\n * The media URI\n *\n * @return {Object}\n * main playlist\n */\n\n const mainForMedia = (media, uri) => {\n const id = createPlaylistID(0, uri);\n const main = {\n mediaGroups: {\n 'AUDIO': {},\n 'VIDEO': {},\n 'CLOSED-CAPTIONS': {},\n 'SUBTITLES': {}\n },\n uri: window.location.href,\n resolvedUri: window.location.href,\n playlists: [{\n uri,\n id,\n resolvedUri: uri,\n // m3u8-parser does not attach an attributes property to media playlists so make\n // sure that the property is attached to avoid undefined reference errors\n attributes: {}\n }]\n }; // set up ID reference\n\n main.playlists[id] = main.playlists[0]; // URI reference added for backwards compatibility\n\n main.playlists[uri] = main.playlists[0];\n return main;\n };\n /**\n * Does an in-place update of the main manifest to add updated playlist URI references\n * as well as other properties needed by VHS that aren't included by the parser.\n *\n * @param {Object} main\n * main manifest object\n * @param {string} uri\n * The source URI\n * @param {function} createGroupID\n * A function to determine how to create the groupID for mediaGroups\n */\n\n const addPropertiesToMain = (main, uri, createGroupID = groupID) => {\n main.uri = uri;\n for (let i = 0; i < main.playlists.length; i++) {\n if (!main.playlists[i].uri) {\n // Set up phony URIs for the playlists since playlists are referenced by their URIs\n // throughout VHS, but some formats (e.g., DASH) don't have external URIs\n // TODO: consider adding dummy URIs in mpd-parser\n const phonyUri = `placeholder-uri-${i}`;\n main.playlists[i].uri = phonyUri;\n }\n }\n const audioOnlyMain = isAudioOnly(main);\n forEachMediaGroup(main, (properties, mediaType, groupKey, labelKey) => {\n // add a playlist array under properties\n if (!properties.playlists || !properties.playlists.length) {\n // If the manifest is audio only and this media group does not have a uri, check\n // if the media group is located in the main list of playlists. If it is, don't add\n // placeholder properties as it shouldn't be considered an alternate audio track.\n if (audioOnlyMain && mediaType === 'AUDIO' && !properties.uri) {\n for (let i = 0; i < main.playlists.length; i++) {\n const p = main.playlists[i];\n if (p.attributes && p.attributes.AUDIO && p.attributes.AUDIO === groupKey) {\n return;\n }\n }\n }\n properties.playlists = [_extends$1({}, properties)];\n }\n properties.playlists.forEach(function (p, i) {\n const groupId = createGroupID(mediaType, groupKey, labelKey, p);\n const id = createPlaylistID(i, groupId);\n if (p.uri) {\n p.resolvedUri = p.resolvedUri || resolveUrl(main.uri, p.uri);\n } else {\n // DEPRECATED, this has been added to prevent a breaking change.\n // previously we only ever had a single media group playlist, so\n // we mark the first playlist uri without prepending the index as we used to\n // ideally we would do all of the playlists the same way.\n p.uri = i === 0 ? groupId : id; // don't resolve a placeholder uri to an absolute url, just use\n // the placeholder again\n\n p.resolvedUri = p.uri;\n }\n p.id = p.id || id; // add an empty attributes object, all playlists are\n // expected to have this.\n\n p.attributes = p.attributes || {}; // setup ID and URI references (URI for backwards compatibility)\n\n main.playlists[p.id] = p;\n main.playlists[p.uri] = p;\n });\n });\n setupMediaPlaylists(main);\n resolveMediaGroupUris(main);\n };\n\n /**\n * @file playlist-loader.js\n *\n * A state machine that manages the loading, caching, and updating of\n * M3U8 playlists.\n *\n */\n const {\n EventTarget: EventTarget$1\n } = videojs;\n const addLLHLSQueryDirectives = (uri, media) => {\n if (media.endList || !media.serverControl) {\n return uri;\n }\n const parameters = {};\n if (media.serverControl.canBlockReload) {\n const {\n preloadSegment\n } = media; // next msn is a zero based value, length is not.\n\n let nextMSN = media.mediaSequence + media.segments.length; // If preload segment has parts then it is likely\n // that we are going to request a part of that preload segment.\n // the logic below is used to determine that.\n\n if (preloadSegment) {\n const parts = preloadSegment.parts || []; // _HLS_part is a zero based index\n\n const nextPart = getKnownPartCount(media) - 1; // if nextPart is > -1 and not equal to just the\n // length of parts, then we know we had part preload hints\n // and we need to add the _HLS_part= query\n\n if (nextPart > -1 && nextPart !== parts.length - 1) {\n // add existing parts to our preload hints\n // eslint-disable-next-line\n parameters._HLS_part = nextPart;\n } // this if statement makes sure that we request the msn\n // of the preload segment if:\n // 1. the preload segment had parts (and was not yet a full segment)\n // but was added to our segments array\n // 2. the preload segment had preload hints for parts that are not in\n // the manifest yet.\n // in all other cases we want the segment after the preload segment\n // which will be given by using media.segments.length because it is 1 based\n // rather than 0 based.\n\n if (nextPart > -1 || parts.length) {\n nextMSN--;\n }\n } // add _HLS_msn= in front of any _HLS_part query\n // eslint-disable-next-line\n\n parameters._HLS_msn = nextMSN;\n }\n if (media.serverControl && media.serverControl.canSkipUntil) {\n // add _HLS_skip= infront of all other queries.\n // eslint-disable-next-line\n parameters._HLS_skip = media.serverControl.canSkipDateranges ? 'v2' : 'YES';\n }\n if (Object.keys(parameters).length) {\n const parsedUri = new window.URL(uri);\n ['_HLS_skip', '_HLS_msn', '_HLS_part'].forEach(function (name) {\n if (!parameters.hasOwnProperty(name)) {\n return;\n }\n parsedUri.searchParams.set(name, parameters[name]);\n });\n uri = parsedUri.toString();\n }\n return uri;\n };\n /**\n * Returns a new segment object with properties and\n * the parts array merged.\n *\n * @param {Object} a the old segment\n * @param {Object} b the new segment\n *\n * @return {Object} the merged segment\n */\n\n const updateSegment = (a, b) => {\n if (!a) {\n return b;\n }\n const result = merge(a, b); // if only the old segment has preload hints\n // and the new one does not, remove preload hints.\n\n if (a.preloadHints && !b.preloadHints) {\n delete result.preloadHints;\n } // if only the old segment has parts\n // then the parts are no longer valid\n\n if (a.parts && !b.parts) {\n delete result.parts; // if both segments have parts\n // copy part propeties from the old segment\n // to the new one.\n } else if (a.parts && b.parts) {\n for (let i = 0; i < b.parts.length; i++) {\n if (a.parts && a.parts[i]) {\n result.parts[i] = merge(a.parts[i], b.parts[i]);\n }\n }\n } // set skipped to false for segments that have\n // have had information merged from the old segment.\n\n if (!a.skipped && b.skipped) {\n result.skipped = false;\n } // set preload to false for segments that have\n // had information added in the new segment.\n\n if (a.preload && !b.preload) {\n result.preload = false;\n }\n return result;\n };\n /**\n * Returns a new array of segments that is the result of merging\n * properties from an older list of segments onto an updated\n * list. No properties on the updated playlist will be ovewritten.\n *\n * @param {Array} original the outdated list of segments\n * @param {Array} update the updated list of segments\n * @param {number=} offset the index of the first update\n * segment in the original segment list. For non-live playlists,\n * this should always be zero and does not need to be\n * specified. For live playlists, it should be the difference\n * between the media sequence numbers in the original and updated\n * playlists.\n * @return {Array} a list of merged segment objects\n */\n\n const updateSegments = (original, update, offset) => {\n const oldSegments = original.slice();\n const newSegments = update.slice();\n offset = offset || 0;\n const result = [];\n let currentMap;\n for (let newIndex = 0; newIndex < newSegments.length; newIndex++) {\n const oldSegment = oldSegments[newIndex + offset];\n const newSegment = newSegments[newIndex];\n if (oldSegment) {\n currentMap = oldSegment.map || currentMap;\n result.push(updateSegment(oldSegment, newSegment));\n } else {\n // carry over map to new segment if it is missing\n if (currentMap && !newSegment.map) {\n newSegment.map = currentMap;\n }\n result.push(newSegment);\n }\n }\n return result;\n };\n const resolveSegmentUris = (segment, baseUri) => {\n // preloadSegment will not have a uri at all\n // as the segment isn't actually in the manifest yet, only parts\n if (!segment.resolvedUri && segment.uri) {\n segment.resolvedUri = resolveUrl(baseUri, segment.uri);\n }\n if (segment.key && !segment.key.resolvedUri) {\n segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);\n }\n if (segment.map && !segment.map.resolvedUri) {\n segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);\n }\n if (segment.map && segment.map.key && !segment.map.key.resolvedUri) {\n segment.map.key.resolvedUri = resolveUrl(baseUri, segment.map.key.uri);\n }\n if (segment.parts && segment.parts.length) {\n segment.parts.forEach(p => {\n if (p.resolvedUri) {\n return;\n }\n p.resolvedUri = resolveUrl(baseUri, p.uri);\n });\n }\n if (segment.preloadHints && segment.preloadHints.length) {\n segment.preloadHints.forEach(p => {\n if (p.resolvedUri) {\n return;\n }\n p.resolvedUri = resolveUrl(baseUri, p.uri);\n });\n }\n };\n const getAllSegments = function (media) {\n const segments = media.segments || [];\n const preloadSegment = media.preloadSegment; // a preloadSegment with only preloadHints is not currently\n // a usable segment, only include a preloadSegment that has\n // parts.\n\n if (preloadSegment && preloadSegment.parts && preloadSegment.parts.length) {\n // if preloadHints has a MAP that means that the\n // init segment is going to change. We cannot use any of the parts\n // from this preload segment.\n if (preloadSegment.preloadHints) {\n for (let i = 0; i < preloadSegment.preloadHints.length; i++) {\n if (preloadSegment.preloadHints[i].type === 'MAP') {\n return segments;\n }\n }\n } // set the duration for our preload segment to target duration.\n\n preloadSegment.duration = media.targetDuration;\n preloadSegment.preload = true;\n segments.push(preloadSegment);\n }\n return segments;\n }; // consider the playlist unchanged if the playlist object is the same or\n // the number of segments is equal, the media sequence number is unchanged,\n // and this playlist hasn't become the end of the playlist\n\n const isPlaylistUnchanged = (a, b) => a === b || a.segments && b.segments && a.segments.length === b.segments.length && a.endList === b.endList && a.mediaSequence === b.mediaSequence && a.preloadSegment === b.preloadSegment;\n /**\n * Returns a new main playlist that is the result of merging an\n * updated media playlist into the original version. If the\n * updated media playlist does not match any of the playlist\n * entries in the original main playlist, null is returned.\n *\n * @param {Object} main a parsed main M3U8 object\n * @param {Object} media a parsed media M3U8 object\n * @return {Object} a new object that represents the original\n * main playlist with the updated media playlist merged in, or\n * null if the merge produced no change.\n */\n\n const updateMain$1 = (main, newMedia, unchangedCheck = isPlaylistUnchanged) => {\n const result = merge(main, {});\n const oldMedia = result.playlists[newMedia.id];\n if (!oldMedia) {\n return null;\n }\n if (unchangedCheck(oldMedia, newMedia)) {\n return null;\n }\n newMedia.segments = getAllSegments(newMedia);\n const mergedPlaylist = merge(oldMedia, newMedia); // always use the new media's preload segment\n\n if (mergedPlaylist.preloadSegment && !newMedia.preloadSegment) {\n delete mergedPlaylist.preloadSegment;\n } // if the update could overlap existing segment information, merge the two segment lists\n\n if (oldMedia.segments) {\n if (newMedia.skip) {\n newMedia.segments = newMedia.segments || []; // add back in objects for skipped segments, so that we merge\n // old properties into the new segments\n\n for (let i = 0; i < newMedia.skip.skippedSegments; i++) {\n newMedia.segments.unshift({\n skipped: true\n });\n }\n }\n mergedPlaylist.segments = updateSegments(oldMedia.segments, newMedia.segments, newMedia.mediaSequence - oldMedia.mediaSequence);\n } // resolve any segment URIs to prevent us from having to do it later\n\n mergedPlaylist.segments.forEach(segment => {\n resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n }); // TODO Right now in the playlists array there are two references to each playlist, one\n // that is referenced by index, and one by URI. The index reference may no longer be\n // necessary.\n\n for (let i = 0; i < result.playlists.length; i++) {\n if (result.playlists[i].id === newMedia.id) {\n result.playlists[i] = mergedPlaylist;\n }\n }\n result.playlists[newMedia.id] = mergedPlaylist; // URI reference added for backwards compatibility\n\n result.playlists[newMedia.uri] = mergedPlaylist; // update media group playlist references.\n\n forEachMediaGroup(main, (properties, mediaType, groupKey, labelKey) => {\n if (!properties.playlists) {\n return;\n }\n for (let i = 0; i < properties.playlists.length; i++) {\n if (newMedia.id === properties.playlists[i].id) {\n properties.playlists[i] = mergedPlaylist;\n }\n }\n });\n return result;\n };\n /**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n * The current media\n * @param {boolean} update\n * True if there were any updates from the last refresh, false otherwise\n * @return {number}\n * The time in ms to wait before refreshing the live playlist\n */\n\n const refreshDelay = (media, update) => {\n const segments = media.segments || [];\n const lastSegment = segments[segments.length - 1];\n const lastPart = lastSegment && lastSegment.parts && lastSegment.parts[lastSegment.parts.length - 1];\n const lastDuration = lastPart && lastPart.duration || lastSegment && lastSegment.duration;\n if (update && lastDuration) {\n return lastDuration * 1000;\n } // if the playlist is unchanged since the last reload or last segment duration\n // cannot be determined, try again after half the target duration\n\n return (media.partTargetDuration || media.targetDuration || 10) * 500;\n };\n /**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends Stream\n * @param {string|Object} src url or object of manifest\n * @param {boolean} withCredentials the withCredentials xhr option\n * @class\n */\n\n class PlaylistLoader extends EventTarget$1 {\n constructor(src, vhs, options = {}) {\n super();\n if (!src) {\n throw new Error('A non-empty playlist URL or object is required');\n }\n this.logger_ = logger('PlaylistLoader');\n const {\n withCredentials = false\n } = options;\n this.src = src;\n this.vhs_ = vhs;\n this.withCredentials = withCredentials;\n const vhsOptions = vhs.options_;\n this.customTagParsers = vhsOptions && vhsOptions.customTagParsers || [];\n this.customTagMappers = vhsOptions && vhsOptions.customTagMappers || [];\n this.llhls = vhsOptions && vhsOptions.llhls; // initialize the loader state\n\n this.state = 'HAVE_NOTHING'; // live playlist staleness timeout\n\n this.handleMediaupdatetimeout_ = this.handleMediaupdatetimeout_.bind(this);\n this.on('mediaupdatetimeout', this.handleMediaupdatetimeout_);\n }\n handleMediaupdatetimeout_() {\n if (this.state !== 'HAVE_METADATA') {\n // only refresh the media playlist if no other activity is going on\n return;\n }\n const media = this.media();\n let uri = resolveUrl(this.main.uri, media.uri);\n if (this.llhls) {\n uri = addLLHLSQueryDirectives(uri, media);\n }\n this.state = 'HAVE_CURRENT_METADATA';\n this.request = this.vhs_.xhr({\n uri,\n withCredentials: this.withCredentials\n }, (error, req) => {\n // disposed\n if (!this.request) {\n return;\n }\n if (error) {\n return this.playlistRequestError(this.request, this.media(), 'HAVE_METADATA');\n }\n this.haveMetadata({\n playlistString: this.request.responseText,\n url: this.media().uri,\n id: this.media().id\n });\n });\n }\n playlistRequestError(xhr, playlist, startingState) {\n const {\n uri,\n id\n } = playlist; // any in-flight request is now finished\n\n this.request = null;\n if (startingState) {\n this.state = startingState;\n }\n this.error = {\n playlist: this.main.playlists[id],\n status: xhr.status,\n message: `HLS playlist request error at URL: ${uri}.`,\n responseText: xhr.responseText,\n code: xhr.status >= 500 ? 4 : 2\n };\n this.trigger('error');\n }\n parseManifest_({\n url,\n manifestString\n }) {\n return parseManifest({\n onwarn: ({\n message\n }) => this.logger_(`m3u8-parser warn for ${url}: ${message}`),\n oninfo: ({\n message\n }) => this.logger_(`m3u8-parser info for ${url}: ${message}`),\n manifestString,\n customTagParsers: this.customTagParsers,\n customTagMappers: this.customTagMappers,\n llhls: this.llhls\n });\n }\n /**\n * Update the playlist loader's state in response to a new or updated playlist.\n *\n * @param {string} [playlistString]\n * Playlist string (if playlistObject is not provided)\n * @param {Object} [playlistObject]\n * Playlist object (if playlistString is not provided)\n * @param {string} url\n * URL of playlist\n * @param {string} id\n * ID to use for playlist\n */\n\n haveMetadata({\n playlistString,\n playlistObject,\n url,\n id\n }) {\n // any in-flight request is now finished\n this.request = null;\n this.state = 'HAVE_METADATA';\n const playlist = playlistObject || this.parseManifest_({\n url,\n manifestString: playlistString\n });\n playlist.lastRequest = Date.now();\n setupMediaPlaylist({\n playlist,\n uri: url,\n id\n }); // merge this playlist into the main manifest\n\n const update = updateMain$1(this.main, playlist);\n this.targetDuration = playlist.partTargetDuration || playlist.targetDuration;\n this.pendingMedia_ = null;\n if (update) {\n this.main = update;\n this.media_ = this.main.playlists[id];\n } else {\n this.trigger('playlistunchanged');\n }\n this.updateMediaUpdateTimeout_(refreshDelay(this.media(), !!update));\n this.trigger('loadedplaylist');\n }\n /**\n * Abort any outstanding work and clean up.\n */\n\n dispose() {\n this.trigger('dispose');\n this.stopRequest();\n window.clearTimeout(this.mediaUpdateTimeout);\n window.clearTimeout(this.finalRenditionTimeout);\n this.off();\n }\n stopRequest() {\n if (this.request) {\n const oldRequest = this.request;\n this.request = null;\n oldRequest.onreadystatechange = null;\n oldRequest.abort();\n }\n }\n /**\n * When called without any arguments, returns the currently\n * active media playlist. When called with a single argument,\n * triggers the playlist loader to asynchronously switch to the\n * specified media playlist. Calling this method while the\n * loader is in the HAVE_NOTHING causes an error to be emitted\n * but otherwise has no effect.\n *\n * @param {Object=} playlist the parsed media playlist\n * object to switch to\n * @param {boolean=} shouldDelay whether we should delay the request by half target duration\n *\n * @return {Playlist} the current loaded media\n */\n\n media(playlist, shouldDelay) {\n // getter\n if (!playlist) {\n return this.media_;\n } // setter\n\n if (this.state === 'HAVE_NOTHING') {\n throw new Error('Cannot switch media playlist from ' + this.state);\n } // find the playlist object if the target playlist has been\n // specified by URI\n\n if (typeof playlist === 'string') {\n if (!this.main.playlists[playlist]) {\n throw new Error('Unknown playlist URI: ' + playlist);\n }\n playlist = this.main.playlists[playlist];\n }\n window.clearTimeout(this.finalRenditionTimeout);\n if (shouldDelay) {\n const delay = (playlist.partTargetDuration || playlist.targetDuration) / 2 * 1000 || 5 * 1000;\n this.finalRenditionTimeout = window.setTimeout(this.media.bind(this, playlist, false), delay);\n return;\n }\n const startingState = this.state;\n const mediaChange = !this.media_ || playlist.id !== this.media_.id;\n const mainPlaylistRef = this.main.playlists[playlist.id]; // switch to fully loaded playlists immediately\n\n if (mainPlaylistRef && mainPlaylistRef.endList ||\n // handle the case of a playlist object (e.g., if using vhs-json with a resolved\n // media playlist or, for the case of demuxed audio, a resolved audio media group)\n playlist.endList && playlist.segments.length) {\n // abort outstanding playlist requests\n if (this.request) {\n this.request.onreadystatechange = null;\n this.request.abort();\n this.request = null;\n }\n this.state = 'HAVE_METADATA';\n this.media_ = playlist; // trigger media change if the active media has been updated\n\n if (mediaChange) {\n this.trigger('mediachanging');\n if (startingState === 'HAVE_MAIN_MANIFEST') {\n // The initial playlist was a main manifest, and the first media selected was\n // also provided (in the form of a resolved playlist object) as part of the\n // source object (rather than just a URL). Therefore, since the media playlist\n // doesn't need to be requested, loadedmetadata won't trigger as part of the\n // normal flow, and needs an explicit trigger here.\n this.trigger('loadedmetadata');\n } else {\n this.trigger('mediachange');\n }\n }\n return;\n } // We update/set the timeout here so that live playlists\n // that are not a media change will \"start\" the loader as expected.\n // We expect that this function will start the media update timeout\n // cycle again. This also prevents a playlist switch failure from\n // causing us to stall during live.\n\n this.updateMediaUpdateTimeout_(refreshDelay(playlist, true)); // switching to the active playlist is a no-op\n\n if (!mediaChange) {\n return;\n }\n this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request\n\n if (this.request) {\n if (playlist.resolvedUri === this.request.url) {\n // requesting to switch to the same playlist multiple times\n // has no effect after the first\n return;\n }\n this.request.onreadystatechange = null;\n this.request.abort();\n this.request = null;\n } // request the new playlist\n\n if (this.media_) {\n this.trigger('mediachanging');\n }\n this.pendingMedia_ = playlist;\n this.request = this.vhs_.xhr({\n uri: playlist.resolvedUri,\n withCredentials: this.withCredentials\n }, (error, req) => {\n // disposed\n if (!this.request) {\n return;\n }\n playlist.lastRequest = Date.now();\n playlist.resolvedUri = resolveManifestRedirect(playlist.resolvedUri, req);\n if (error) {\n return this.playlistRequestError(this.request, playlist, startingState);\n }\n this.haveMetadata({\n playlistString: req.responseText,\n url: playlist.uri,\n id: playlist.id\n }); // fire loadedmetadata the first time a media playlist is loaded\n\n if (startingState === 'HAVE_MAIN_MANIFEST') {\n this.trigger('loadedmetadata');\n } else {\n this.trigger('mediachange');\n }\n });\n }\n /**\n * pause loading of the playlist\n */\n\n pause() {\n if (this.mediaUpdateTimeout) {\n window.clearTimeout(this.mediaUpdateTimeout);\n this.mediaUpdateTimeout = null;\n }\n this.stopRequest();\n if (this.state === 'HAVE_NOTHING') {\n // If we pause the loader before any data has been retrieved, its as if we never\n // started, so reset to an unstarted state.\n this.started = false;\n } // Need to restore state now that no activity is happening\n\n if (this.state === 'SWITCHING_MEDIA') {\n // if the loader was in the process of switching media, it should either return to\n // HAVE_MAIN_MANIFEST or HAVE_METADATA depending on if the loader has loaded a media\n // playlist yet. This is determined by the existence of loader.media_\n if (this.media_) {\n this.state = 'HAVE_METADATA';\n } else {\n this.state = 'HAVE_MAIN_MANIFEST';\n }\n } else if (this.state === 'HAVE_CURRENT_METADATA') {\n this.state = 'HAVE_METADATA';\n }\n }\n /**\n * start loading of the playlist\n */\n\n load(shouldDelay) {\n if (this.mediaUpdateTimeout) {\n window.clearTimeout(this.mediaUpdateTimeout);\n this.mediaUpdateTimeout = null;\n }\n const media = this.media();\n if (shouldDelay) {\n const delay = media ? (media.partTargetDuration || media.targetDuration) / 2 * 1000 : 5 * 1000;\n this.mediaUpdateTimeout = window.setTimeout(() => {\n this.mediaUpdateTimeout = null;\n this.load();\n }, delay);\n return;\n }\n if (!this.started) {\n this.start();\n return;\n }\n if (media && !media.endList) {\n this.trigger('mediaupdatetimeout');\n } else {\n this.trigger('loadedplaylist');\n }\n }\n updateMediaUpdateTimeout_(delay) {\n if (this.mediaUpdateTimeout) {\n window.clearTimeout(this.mediaUpdateTimeout);\n this.mediaUpdateTimeout = null;\n } // we only have use mediaupdatetimeout for live playlists.\n\n if (!this.media() || this.media().endList) {\n return;\n }\n this.mediaUpdateTimeout = window.setTimeout(() => {\n this.mediaUpdateTimeout = null;\n this.trigger('mediaupdatetimeout');\n this.updateMediaUpdateTimeout_(delay);\n }, delay);\n }\n /**\n * start loading of the playlist\n */\n\n start() {\n this.started = true;\n if (typeof this.src === 'object') {\n // in the case of an entirely constructed manifest object (meaning there's no actual\n // manifest on a server), default the uri to the page's href\n if (!this.src.uri) {\n this.src.uri = window.location.href;\n } // resolvedUri is added on internally after the initial request. Since there's no\n // request for pre-resolved manifests, add on resolvedUri here.\n\n this.src.resolvedUri = this.src.uri; // Since a manifest object was passed in as the source (instead of a URL), the first\n // request can be skipped (since the top level of the manifest, at a minimum, is\n // already available as a parsed manifest object). However, if the manifest object\n // represents a main playlist, some media playlists may need to be resolved before\n // the starting segment list is available. Therefore, go directly to setup of the\n // initial playlist, and let the normal flow continue from there.\n //\n // Note that the call to setup is asynchronous, as other sections of VHS may assume\n // that the first request is asynchronous.\n\n setTimeout(() => {\n this.setupInitialPlaylist(this.src);\n }, 0);\n return;\n } // request the specified URL\n\n this.request = this.vhs_.xhr({\n uri: this.src,\n withCredentials: this.withCredentials\n }, (error, req) => {\n // disposed\n if (!this.request) {\n return;\n } // clear the loader's request reference\n\n this.request = null;\n if (error) {\n this.error = {\n status: req.status,\n message: `HLS playlist request error at URL: ${this.src}.`,\n responseText: req.responseText,\n // MEDIA_ERR_NETWORK\n code: 2\n };\n if (this.state === 'HAVE_NOTHING') {\n this.started = false;\n }\n return this.trigger('error');\n }\n this.src = resolveManifestRedirect(this.src, req);\n const manifest = this.parseManifest_({\n manifestString: req.responseText,\n url: this.src\n });\n this.setupInitialPlaylist(manifest);\n });\n }\n srcUri() {\n return typeof this.src === 'string' ? this.src : this.src.uri;\n }\n /**\n * Given a manifest object that's either a main or media playlist, trigger the proper\n * events and set the state of the playlist loader.\n *\n * If the manifest object represents a main playlist, `loadedplaylist` will be\n * triggered to allow listeners to select a playlist. If none is selected, the loader\n * will default to the first one in the playlists array.\n *\n * If the manifest object represents a media playlist, `loadedplaylist` will be\n * triggered followed by `loadedmetadata`, as the only available playlist is loaded.\n *\n * In the case of a media playlist, a main playlist object wrapper with one playlist\n * will be created so that all logic can handle playlists in the same fashion (as an\n * assumed manifest object schema).\n *\n * @param {Object} manifest\n * The parsed manifest object\n */\n\n setupInitialPlaylist(manifest) {\n this.state = 'HAVE_MAIN_MANIFEST';\n if (manifest.playlists) {\n this.main = manifest;\n addPropertiesToMain(this.main, this.srcUri()); // If the initial main playlist has playlists wtih segments already resolved,\n // then resolve URIs in advance, as they are usually done after a playlist request,\n // which may not happen if the playlist is resolved.\n\n manifest.playlists.forEach(playlist => {\n playlist.segments = getAllSegments(playlist);\n playlist.segments.forEach(segment => {\n resolveSegmentUris(segment, playlist.resolvedUri);\n });\n });\n this.trigger('loadedplaylist');\n if (!this.request) {\n // no media playlist was specifically selected so start\n // from the first listed one\n this.media(this.main.playlists[0]);\n }\n return;\n } // In order to support media playlists passed in as vhs-json, the case where the uri\n // is not provided as part of the manifest should be considered, and an appropriate\n // default used.\n\n const uri = this.srcUri() || window.location.href;\n this.main = mainForMedia(manifest, uri);\n this.haveMetadata({\n playlistObject: manifest,\n url: uri,\n id: this.main.playlists[0].id\n });\n this.trigger('loadedmetadata');\n }\n }\n\n /**\n * @file xhr.js\n */\n const {\n xhr: videojsXHR\n } = videojs;\n const callbackWrapper = function (request, error, response, callback) {\n const reqResponse = request.responseType === 'arraybuffer' ? request.response : request.responseText;\n if (!error && reqResponse) {\n request.responseTime = Date.now();\n request.roundTripTime = request.responseTime - request.requestTime;\n request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n if (!request.bandwidth) {\n request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n }\n }\n if (response.headers) {\n request.responseHeaders = response.headers;\n } // videojs.xhr now uses a specific code on the error\n // object to signal that a request has timed out instead\n // of setting a boolean on the request object\n\n if (error && error.code === 'ETIMEDOUT') {\n request.timedout = true;\n } // videojs.xhr no longer considers status codes outside of 200 and 0\n // (for file uris) to be errors, but the old XHR did, so emulate that\n // behavior. Status 206 may be used in response to byterange requests.\n\n if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n }\n callback(error, request);\n };\n const xhrFactory = function () {\n const xhr = function XhrFunction(options, callback) {\n // Add a default timeout\n options = merge({\n timeout: 45e3\n }, options); // Allow an optional user-specified function to modify the option\n // object before we construct the xhr request\n\n const beforeRequest = XhrFunction.beforeRequest || videojs.Vhs.xhr.beforeRequest;\n if (beforeRequest && typeof beforeRequest === 'function') {\n const newOptions = beforeRequest(options);\n if (newOptions) {\n options = newOptions;\n }\n } // Use the standard videojs.xhr() method unless `videojs.Vhs.xhr` has been overriden\n // TODO: switch back to videojs.Vhs.xhr.name === 'XhrFunction' when we drop IE11\n\n const xhrMethod = videojs.Vhs.xhr.original === true ? videojsXHR : videojs.Vhs.xhr;\n const request = xhrMethod(options, function (error, response) {\n return callbackWrapper(request, error, response, callback);\n });\n const originalAbort = request.abort;\n request.abort = function () {\n request.aborted = true;\n return originalAbort.apply(request, arguments);\n };\n request.uri = options.uri;\n request.requestTime = Date.now();\n return request;\n };\n xhr.original = true;\n return xhr;\n };\n /**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n * of a byte-range\n */\n\n const byterangeStr = function (byterange) {\n // `byterangeEnd` is one less than `offset + length` because the HTTP range\n // header uses inclusive ranges\n let byterangeEnd;\n const byterangeStart = byterange.offset;\n if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n byterangeEnd = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);\n } else {\n byterangeEnd = byterange.offset + byterange.length - 1;\n }\n return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n };\n /**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n */\n\n const segmentXhrHeaders = function (segment) {\n const headers = {};\n if (segment.byterange) {\n headers.Range = byterangeStr(segment.byterange);\n }\n return headers;\n };\n\n /**\n * @file bin-utils.js\n */\n\n /**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {number} i the iterator on the range to convert\n * @return {string} the range in string format\n */\n\n const textRange = function (range, i) {\n return range.start(i) + '-' + range.end(i);\n };\n /**\n * format a number as hex string\n *\n * @param {number} e The number\n * @param {number} i the iterator\n * @return {string} the hex formatted number as a string\n */\n\n const formatHexString = function (e, i) {\n const value = e.toString(16);\n return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n };\n const formatAsciiString = function (e) {\n if (e >= 0x20 && e < 0x7e) {\n return String.fromCharCode(e);\n }\n return '.';\n };\n /**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n * Object of properties and values to send to the web worker\n * @return {Object}\n * Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n const createTransferableMessage = function (message) {\n const transferable = {};\n Object.keys(message).forEach(key => {\n const value = message[key];\n if (isArrayBufferView(value)) {\n transferable[key] = {\n bytes: value.buffer,\n byteOffset: value.byteOffset,\n byteLength: value.byteLength\n };\n } else {\n transferable[key] = value;\n }\n });\n return transferable;\n };\n /**\n * Returns a unique string identifier for a media initialization\n * segment.\n *\n * @param {Object} initSegment\n * the init segment object.\n *\n * @return {string} the generated init segment id\n */\n\n const initSegmentId = function (initSegment) {\n const byterange = initSegment.byterange || {\n length: Infinity,\n offset: 0\n };\n return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n };\n /**\n * Returns a unique string identifier for a media segment key.\n *\n * @param {Object} key the encryption key\n * @return {string} the unique id for the media segment key.\n */\n\n const segmentKeyId = function (key) {\n return key.resolvedUri;\n };\n /**\n * utils to help dump binary data to the console\n *\n * @param {Array|TypedArray} data\n * data to dump to a string\n *\n * @return {string} the data as a hex string.\n */\n\n const hexDump = data => {\n const bytes = Array.prototype.slice.call(data);\n const step = 16;\n let result = '';\n let hex;\n let ascii;\n for (let j = 0; j < bytes.length / step; j++) {\n hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n result += hex + ' ' + ascii + '\\n';\n }\n return result;\n };\n const tagDump = ({\n bytes\n }) => hexDump(bytes);\n const textRanges = ranges => {\n let result = '';\n let i;\n for (i = 0; i < ranges.length; i++) {\n result += textRange(ranges, i) + ' ';\n }\n return result;\n };\n var utils = /*#__PURE__*/Object.freeze({\n __proto__: null,\n createTransferableMessage: createTransferableMessage,\n initSegmentId: initSegmentId,\n segmentKeyId: segmentKeyId,\n hexDump: hexDump,\n tagDump: tagDump,\n textRanges: textRanges\n });\n\n // TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux\n // 25% was arbitrarily chosen, and may need to be refined over time.\n\n const SEGMENT_END_FUDGE_PERCENT = 0.25;\n /**\n * Converts a player time (any time that can be gotten/set from player.currentTime(),\n * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a\n * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).\n *\n * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an \"anchor\n * point\" (a point where we have a mapping from program time to player time, with player\n * time being the post transmux start of the segment).\n *\n * For more details, see [this doc](../../docs/program-time-from-player-time.md).\n *\n * @param {number} playerTime the player time\n * @param {Object} segment the segment which contains the player time\n * @return {Date} program time\n */\n\n const playerTimeToProgramTime = (playerTime, segment) => {\n if (!segment.dateTimeObject) {\n // Can't convert without an \"anchor point\" for the program time (i.e., a time that can\n // be used to map the start of a segment with a real world time).\n return null;\n }\n const transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;\n const transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended\n\n const startOfSegment = transmuxedStart + transmuxerPrependedSeconds;\n const offsetFromSegmentStart = playerTime - startOfSegment;\n return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);\n };\n const originalSegmentVideoDuration = videoTimingInfo => {\n return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;\n };\n /**\n * Finds a segment that contains the time requested given as an ISO-8601 string. The\n * returned segment might be an estimate or an accurate match.\n *\n * @param {string} programTime The ISO-8601 programTime to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n const findSegmentForProgramTime = (programTime, playlist) => {\n // Assumptions:\n // - verifyProgramDateTimeTags has already been run\n // - live streams have been started\n let dateTimeObject;\n try {\n dateTimeObject = new Date(programTime);\n } catch (e) {\n return null;\n }\n if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n return null;\n }\n let segment = playlist.segments[0];\n if (dateTimeObject < segment.dateTimeObject) {\n // Requested time is before stream start.\n return null;\n }\n for (let i = 0; i < playlist.segments.length - 1; i++) {\n segment = playlist.segments[i];\n const nextSegmentStart = playlist.segments[i + 1].dateTimeObject;\n if (dateTimeObject < nextSegmentStart) {\n break;\n }\n }\n const lastSegment = playlist.segments[playlist.segments.length - 1];\n const lastSegmentStart = lastSegment.dateTimeObject;\n const lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;\n const lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);\n if (dateTimeObject > lastSegmentEnd) {\n // Beyond the end of the stream, or our best guess of the end of the stream.\n return null;\n }\n if (dateTimeObject > lastSegmentStart) {\n segment = lastSegment;\n }\n return {\n segment,\n estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),\n // Although, given that all segments have accurate date time objects, the segment\n // selected should be accurate, unless the video has been transmuxed at some point\n // (determined by the presence of the videoTimingInfo object), the segment's \"player\n // time\" (the start time in the player) can't be considered accurate.\n type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n };\n };\n /**\n * Finds a segment that contains the given player time(in seconds).\n *\n * @param {number} time The player time to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n const findSegmentForPlayerTime = (time, playlist) => {\n // Assumptions:\n // - there will always be a segment.duration\n // - we can start from zero\n // - segments are in time order\n if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n return null;\n }\n let segmentEnd = 0;\n let segment;\n for (let i = 0; i < playlist.segments.length; i++) {\n segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and\n // should contain the most accurate values we have for the segment's player times.\n //\n // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall\n // back to an estimate based on the manifest derived (inaccurate) segment.duration, to\n // calculate an end value.\n\n segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;\n if (time <= segmentEnd) {\n break;\n }\n }\n const lastSegment = playlist.segments[playlist.segments.length - 1];\n if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {\n // The time requested is beyond the stream end.\n return null;\n }\n if (time > segmentEnd) {\n // The time is within or beyond the last segment.\n //\n // Check to see if the time is beyond a reasonable guess of the end of the stream.\n if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {\n // Technically, because the duration value is only an estimate, the time may still\n // exist in the last segment, however, there isn't enough information to make even\n // a reasonable estimate.\n return null;\n }\n segment = lastSegment;\n }\n return {\n segment,\n estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,\n // Because videoTimingInfo is only set after transmux, it is the only way to get\n // accurate timing values.\n type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n };\n };\n /**\n * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.\n * If the offset returned is positive, the programTime occurs after the\n * comparisonTimestamp.\n * If the offset is negative, the programTime occurs before the comparisonTimestamp.\n *\n * @param {string} comparisonTimeStamp An ISO-8601 timestamp to compare against\n * @param {string} programTime The programTime as an ISO-8601 string\n * @return {number} offset\n */\n\n const getOffsetFromTimestamp = (comparisonTimeStamp, programTime) => {\n let segmentDateTime;\n let programDateTime;\n try {\n segmentDateTime = new Date(comparisonTimeStamp);\n programDateTime = new Date(programTime);\n } catch (e) {// TODO handle error\n }\n const segmentTimeEpoch = segmentDateTime.getTime();\n const programTimeEpoch = programDateTime.getTime();\n return (programTimeEpoch - segmentTimeEpoch) / 1000;\n };\n /**\n * Checks that all segments in this playlist have programDateTime tags.\n *\n * @param {Object} playlist A playlist object\n */\n\n const verifyProgramDateTimeTags = playlist => {\n if (!playlist.segments || playlist.segments.length === 0) {\n return false;\n }\n for (let i = 0; i < playlist.segments.length; i++) {\n const segment = playlist.segments[i];\n if (!segment.dateTimeObject) {\n return false;\n }\n }\n return true;\n };\n /**\n * Returns the programTime of the media given a playlist and a playerTime.\n * The playlist must have programDateTime tags for a programDateTime tag to be returned.\n * If the segments containing the time requested have not been buffered yet, an estimate\n * may be returned to the callback.\n *\n * @param {Object} args\n * @param {Object} args.playlist A playlist object to search within\n * @param {number} time A playerTime in seconds\n * @param {Function} callback(err, programTime)\n * @return {string} err.message A detailed error message\n * @return {Object} programTime\n * @return {number} programTime.mediaSeconds The streamTime in seconds\n * @return {string} programTime.programDateTime The programTime as an ISO-8601 String\n */\n\n const getProgramTime = ({\n playlist,\n time = undefined,\n callback\n }) => {\n if (!callback) {\n throw new Error('getProgramTime: callback must be provided');\n }\n if (!playlist || time === undefined) {\n return callback({\n message: 'getProgramTime: playlist and time must be provided'\n });\n }\n const matchedSegment = findSegmentForPlayerTime(time, playlist);\n if (!matchedSegment) {\n return callback({\n message: 'valid programTime was not found'\n });\n }\n if (matchedSegment.type === 'estimate') {\n return callback({\n message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',\n seekTime: matchedSegment.estimatedStart\n });\n }\n const programTimeObject = {\n mediaSeconds: time\n };\n const programTime = playerTimeToProgramTime(time, matchedSegment.segment);\n if (programTime) {\n programTimeObject.programDateTime = programTime.toISOString();\n }\n return callback(null, programTimeObject);\n };\n /**\n * Seeks in the player to a time that matches the given programTime ISO-8601 string.\n *\n * @param {Object} args\n * @param {string} args.programTime A programTime to seek to as an ISO-8601 String\n * @param {Object} args.playlist A playlist to look within\n * @param {number} args.retryCount The number of times to try for an accurate seek. Default is 2.\n * @param {Function} args.seekTo A method to perform a seek\n * @param {boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.\n * @param {Object} args.tech The tech to seek on\n * @param {Function} args.callback(err, newTime) A callback to return the new time to\n * @return {string} err.message A detailed error message\n * @return {number} newTime The exact time that was seeked to in seconds\n */\n\n const seekToProgramTime = ({\n programTime,\n playlist,\n retryCount = 2,\n seekTo,\n pauseAfterSeek = true,\n tech,\n callback\n }) => {\n if (!callback) {\n throw new Error('seekToProgramTime: callback must be provided');\n }\n if (typeof programTime === 'undefined' || !playlist || !seekTo) {\n return callback({\n message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'\n });\n }\n if (!playlist.endList && !tech.hasStarted_) {\n return callback({\n message: 'player must be playing a live stream to start buffering'\n });\n }\n if (!verifyProgramDateTimeTags(playlist)) {\n return callback({\n message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri\n });\n }\n const matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match\n\n if (!matchedSegment) {\n return callback({\n message: `${programTime} was not found in the stream`\n });\n }\n const segment = matchedSegment.segment;\n const mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);\n if (matchedSegment.type === 'estimate') {\n // we've run out of retries\n if (retryCount === 0) {\n return callback({\n message: `${programTime} is not buffered yet. Try again`\n });\n }\n seekTo(matchedSegment.estimatedStart + mediaOffset);\n tech.one('seeked', () => {\n seekToProgramTime({\n programTime,\n playlist,\n retryCount: retryCount - 1,\n seekTo,\n pauseAfterSeek,\n tech,\n callback\n });\n });\n return;\n } // Since the segment.start value is determined from the buffered end or ending time\n // of the prior segment, the seekToTime doesn't need to account for any transmuxer\n // modifications.\n\n const seekToTime = segment.start + mediaOffset;\n const seekedCallback = () => {\n return callback(null, tech.currentTime());\n }; // listen for seeked event\n\n tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state\n\n if (pauseAfterSeek) {\n tech.pause();\n }\n seekTo(seekToTime);\n };\n\n // which will only happen if the request is complete.\n\n const callbackOnCompleted = (request, cb) => {\n if (request.readyState === 4) {\n return cb();\n }\n return;\n };\n const containerRequest = (uri, xhr, cb) => {\n let bytes = [];\n let id3Offset;\n let finished = false;\n const endRequestAndCallback = function (err, req, type, _bytes) {\n req.abort();\n finished = true;\n return cb(err, req, type, _bytes);\n };\n const progressListener = function (error, request) {\n if (finished) {\n return;\n }\n if (error) {\n return endRequestAndCallback(error, request, '', bytes);\n } // grap the new part of content that was just downloaded\n\n const newPart = request.responseText.substring(bytes && bytes.byteLength || 0, request.responseText.length); // add that onto bytes\n\n bytes = concatTypedArrays(bytes, stringToBytes(newPart, true));\n id3Offset = id3Offset || getId3Offset(bytes); // we need at least 10 bytes to determine a type\n // or we need at least two bytes after an id3Offset\n\n if (bytes.length < 10 || id3Offset && bytes.length < id3Offset + 2) {\n return callbackOnCompleted(request, () => endRequestAndCallback(error, request, '', bytes));\n }\n const type = detectContainerForBytes(bytes); // if this looks like a ts segment but we don't have enough data\n // to see the second sync byte, wait until we have enough data\n // before declaring it ts\n\n if (type === 'ts' && bytes.length < 188) {\n return callbackOnCompleted(request, () => endRequestAndCallback(error, request, '', bytes));\n } // this may be an unsynced ts segment\n // wait for 376 bytes before detecting no container\n\n if (!type && bytes.length < 376) {\n return callbackOnCompleted(request, () => endRequestAndCallback(error, request, '', bytes));\n }\n return endRequestAndCallback(null, request, type, bytes);\n };\n const options = {\n uri,\n beforeSend(request) {\n // this forces the browser to pass the bytes to us unprocessed\n request.overrideMimeType('text/plain; charset=x-user-defined');\n request.addEventListener('progress', function ({\n total,\n loaded\n }) {\n return callbackWrapper(request, null, {\n statusCode: request.status\n }, progressListener);\n });\n }\n };\n const request = xhr(options, function (error, response) {\n return callbackWrapper(request, error, response, progressListener);\n });\n return request;\n };\n const {\n EventTarget\n } = videojs;\n const dashPlaylistUnchanged = function (a, b) {\n if (!isPlaylistUnchanged(a, b)) {\n return false;\n } // for dash the above check will often return true in scenarios where\n // the playlist actually has changed because mediaSequence isn't a\n // dash thing, and we often set it to 1. So if the playlists have the same amount\n // of segments we return true.\n // So for dash we need to make sure that the underlying segments are different.\n // if sidx changed then the playlists are different.\n\n if (a.sidx && b.sidx && (a.sidx.offset !== b.sidx.offset || a.sidx.length !== b.sidx.length)) {\n return false;\n } else if (!a.sidx && b.sidx || a.sidx && !b.sidx) {\n return false;\n } // one or the other does not have segments\n // there was a change.\n\n if (a.segments && !b.segments || !a.segments && b.segments) {\n return false;\n } // neither has segments nothing changed\n\n if (!a.segments && !b.segments) {\n return true;\n } // check segments themselves\n\n for (let i = 0; i < a.segments.length; i++) {\n const aSegment = a.segments[i];\n const bSegment = b.segments[i]; // if uris are different between segments there was a change\n\n if (aSegment.uri !== bSegment.uri) {\n return false;\n } // neither segment has a byterange, there will be no byterange change.\n\n if (!aSegment.byterange && !bSegment.byterange) {\n continue;\n }\n const aByterange = aSegment.byterange;\n const bByterange = bSegment.byterange; // if byterange only exists on one of the segments, there was a change.\n\n if (aByterange && !bByterange || !aByterange && bByterange) {\n return false;\n } // if both segments have byterange with different offsets, there was a change.\n\n if (aByterange.offset !== bByterange.offset || aByterange.length !== bByterange.length) {\n return false;\n }\n } // if everything was the same with segments, this is the same playlist.\n\n return true;\n };\n /**\n * Use the representation IDs from the mpd object to create groupIDs, the NAME is set to mandatory representation\n * ID in the parser. This allows for continuous playout across periods with the same representation IDs\n * (continuous periods as defined in DASH-IF 3.2.12). This is assumed in the mpd-parser as well. If we want to support\n * periods without continuous playback this function may need modification as well as the parser.\n */\n\n const dashGroupId = (type, group, label, playlist) => {\n // If the manifest somehow does not have an ID (non-dash compliant), use the label.\n const playlistId = playlist.attributes.NAME || label;\n return `placeholder-uri-${type}-${group}-${playlistId}`;\n };\n /**\n * Parses the main XML string and updates playlist URI references.\n *\n * @param {Object} config\n * Object of arguments\n * @param {string} config.mainXml\n * The mpd XML\n * @param {string} config.srcUrl\n * The mpd URL\n * @param {Date} config.clientOffset\n * A time difference between server and client\n * @param {Object} config.sidxMapping\n * SIDX mappings for moof/mdat URIs and byte ranges\n * @return {Object}\n * The parsed mpd manifest object\n */\n\n const parseMainXml = ({\n mainXml,\n srcUrl,\n clientOffset,\n sidxMapping,\n previousManifest\n }) => {\n const manifest = parse(mainXml, {\n manifestUri: srcUrl,\n clientOffset,\n sidxMapping,\n previousManifest\n });\n addPropertiesToMain(manifest, srcUrl, dashGroupId);\n return manifest;\n };\n /**\n * Removes any mediaGroup labels that no longer exist in the newMain\n *\n * @param {Object} update\n * The previous mpd object being updated\n * @param {Object} newMain\n * The new mpd object\n */\n\n const removeOldMediaGroupLabels = (update, newMain) => {\n forEachMediaGroup(update, (properties, type, group, label) => {\n if (!(label in newMain.mediaGroups[type][group])) {\n delete update.mediaGroups[type][group][label];\n }\n });\n };\n /**\n * Returns a new main manifest that is the result of merging an updated main manifest\n * into the original version.\n *\n * @param {Object} oldMain\n * The old parsed mpd object\n * @param {Object} newMain\n * The updated parsed mpd object\n * @return {Object}\n * A new object representing the original main manifest with the updated media\n * playlists merged in\n */\n\n const updateMain = (oldMain, newMain, sidxMapping) => {\n let noChanges = true;\n let update = merge(oldMain, {\n // These are top level properties that can be updated\n duration: newMain.duration,\n minimumUpdatePeriod: newMain.minimumUpdatePeriod,\n timelineStarts: newMain.timelineStarts\n }); // First update the playlists in playlist list\n\n for (let i = 0; i < newMain.playlists.length; i++) {\n const playlist = newMain.playlists[i];\n if (playlist.sidx) {\n const sidxKey = generateSidxKey(playlist.sidx); // add sidx segments to the playlist if we have all the sidx info already\n\n if (sidxMapping && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx) {\n addSidxSegmentsToPlaylist$1(playlist, sidxMapping[sidxKey].sidx, playlist.sidx.resolvedUri);\n }\n }\n const playlistUpdate = updateMain$1(update, playlist, dashPlaylistUnchanged);\n if (playlistUpdate) {\n update = playlistUpdate;\n noChanges = false;\n }\n } // Then update media group playlists\n\n forEachMediaGroup(newMain, (properties, type, group, label) => {\n if (properties.playlists && properties.playlists.length) {\n const id = properties.playlists[0].id;\n const playlistUpdate = updateMain$1(update, properties.playlists[0], dashPlaylistUnchanged);\n if (playlistUpdate) {\n update = playlistUpdate; // add new mediaGroup label if it doesn't exist and assign the new mediaGroup.\n\n if (!(label in update.mediaGroups[type][group])) {\n update.mediaGroups[type][group][label] = properties;\n } // update the playlist reference within media groups\n\n update.mediaGroups[type][group][label].playlists[0] = update.playlists[id];\n noChanges = false;\n }\n }\n }); // remove mediaGroup labels and references that no longer exist in the newMain\n\n removeOldMediaGroupLabels(update, newMain);\n if (newMain.minimumUpdatePeriod !== oldMain.minimumUpdatePeriod) {\n noChanges = false;\n }\n if (noChanges) {\n return null;\n }\n return update;\n }; // SIDX should be equivalent if the URI and byteranges of the SIDX match.\n // If the SIDXs have maps, the two maps should match,\n // both `a` and `b` missing SIDXs is considered matching.\n // If `a` or `b` but not both have a map, they aren't matching.\n\n const equivalentSidx = (a, b) => {\n const neitherMap = Boolean(!a.map && !b.map);\n const equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);\n return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;\n }; // exported for testing\n\n const compareSidxEntry = (playlists, oldSidxMapping) => {\n const newSidxMapping = {};\n for (const id in playlists) {\n const playlist = playlists[id];\n const currentSidxInfo = playlist.sidx;\n if (currentSidxInfo) {\n const key = generateSidxKey(currentSidxInfo);\n if (!oldSidxMapping[key]) {\n break;\n }\n const savedSidxInfo = oldSidxMapping[key].sidxInfo;\n if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {\n newSidxMapping[key] = oldSidxMapping[key];\n }\n }\n }\n return newSidxMapping;\n };\n /**\n * A function that filters out changed items as they need to be requested separately.\n *\n * The method is exported for testing\n *\n * @param {Object} main the parsed mpd XML returned via mpd-parser\n * @param {Object} oldSidxMapping the SIDX to compare against\n */\n\n const filterChangedSidxMappings = (main, oldSidxMapping) => {\n const videoSidx = compareSidxEntry(main.playlists, oldSidxMapping);\n let mediaGroupSidx = videoSidx;\n forEachMediaGroup(main, (properties, mediaType, groupKey, labelKey) => {\n if (properties.playlists && properties.playlists.length) {\n const playlists = properties.playlists;\n mediaGroupSidx = merge(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));\n }\n });\n return mediaGroupSidx;\n };\n class DashPlaylistLoader extends EventTarget {\n // DashPlaylistLoader must accept either a src url or a playlist because subsequent\n // playlist loader setups from media groups will expect to be able to pass a playlist\n // (since there aren't external URLs to media playlists with DASH)\n constructor(srcUrlOrPlaylist, vhs, options = {}, mainPlaylistLoader) {\n super();\n this.mainPlaylistLoader_ = mainPlaylistLoader || this;\n if (!mainPlaylistLoader) {\n this.isMain_ = true;\n }\n const {\n withCredentials = false\n } = options;\n this.vhs_ = vhs;\n this.withCredentials = withCredentials;\n if (!srcUrlOrPlaylist) {\n throw new Error('A non-empty playlist URL or object is required');\n } // event naming?\n\n this.on('minimumUpdatePeriod', () => {\n this.refreshXml_();\n }); // live playlist staleness timeout\n\n this.on('mediaupdatetimeout', () => {\n this.refreshMedia_(this.media().id);\n });\n this.state = 'HAVE_NOTHING';\n this.loadedPlaylists_ = {};\n this.logger_ = logger('DashPlaylistLoader'); // initialize the loader state\n // The mainPlaylistLoader will be created with a string\n\n if (this.isMain_) {\n this.mainPlaylistLoader_.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes\n // once multi-period is refactored\n\n this.mainPlaylistLoader_.sidxMapping_ = {};\n } else {\n this.childPlaylist_ = srcUrlOrPlaylist;\n }\n }\n requestErrored_(err, request, startingState) {\n // disposed\n if (!this.request) {\n return true;\n } // pending request is cleared\n\n this.request = null;\n if (err) {\n // use the provided error object or create one\n // based on the request/response\n this.error = typeof err === 'object' && !(err instanceof Error) ? err : {\n status: request.status,\n message: 'DASH request error at URL: ' + request.uri,\n response: request.response,\n // MEDIA_ERR_NETWORK\n code: 2\n };\n if (startingState) {\n this.state = startingState;\n }\n this.trigger('error');\n return true;\n }\n }\n /**\n * Verify that the container of the sidx segment can be parsed\n * and if it can, get and parse that segment.\n */\n\n addSidxSegments_(playlist, startingState, cb) {\n const sidxKey = playlist.sidx && generateSidxKey(playlist.sidx); // playlist lacks sidx or sidx segments were added to this playlist already.\n\n if (!playlist.sidx || !sidxKey || this.mainPlaylistLoader_.sidxMapping_[sidxKey]) {\n // keep this function async\n this.mediaRequest_ = window.setTimeout(() => cb(false), 0);\n return;\n } // resolve the segment URL relative to the playlist\n\n const uri = resolveManifestRedirect(playlist.sidx.resolvedUri);\n const fin = (err, request) => {\n if (this.requestErrored_(err, request, startingState)) {\n return;\n }\n const sidxMapping = this.mainPlaylistLoader_.sidxMapping_;\n let sidx;\n try {\n sidx = parseSidx_1(toUint8(request.response).subarray(8));\n } catch (e) {\n // sidx parsing failed.\n this.requestErrored_(e, request, startingState);\n return;\n }\n sidxMapping[sidxKey] = {\n sidxInfo: playlist.sidx,\n sidx\n };\n addSidxSegmentsToPlaylist$1(playlist, sidx, playlist.sidx.resolvedUri);\n return cb(true);\n };\n this.request = containerRequest(uri, this.vhs_.xhr, (err, request, container, bytes) => {\n if (err) {\n return fin(err, request);\n }\n if (!container || container !== 'mp4') {\n return fin({\n status: request.status,\n message: `Unsupported ${container || 'unknown'} container type for sidx segment at URL: ${uri}`,\n // response is just bytes in this case\n // but we really don't want to return that.\n response: '',\n playlist,\n internal: true,\n playlistExclusionDuration: Infinity,\n // MEDIA_ERR_NETWORK\n code: 2\n }, request);\n } // if we already downloaded the sidx bytes in the container request, use them\n\n const {\n offset,\n length\n } = playlist.sidx.byterange;\n if (bytes.length >= length + offset) {\n return fin(err, {\n response: bytes.subarray(offset, offset + length),\n status: request.status,\n uri: request.uri\n });\n } // otherwise request sidx bytes\n\n this.request = this.vhs_.xhr({\n uri,\n responseType: 'arraybuffer',\n headers: segmentXhrHeaders({\n byterange: playlist.sidx.byterange\n })\n }, fin);\n });\n }\n dispose() {\n this.trigger('dispose');\n this.stopRequest();\n this.loadedPlaylists_ = {};\n window.clearTimeout(this.minimumUpdatePeriodTimeout_);\n window.clearTimeout(this.mediaRequest_);\n window.clearTimeout(this.mediaUpdateTimeout);\n this.mediaUpdateTimeout = null;\n this.mediaRequest_ = null;\n this.minimumUpdatePeriodTimeout_ = null;\n if (this.mainPlaylistLoader_.createMupOnMedia_) {\n this.off('loadedmetadata', this.mainPlaylistLoader_.createMupOnMedia_);\n this.mainPlaylistLoader_.createMupOnMedia_ = null;\n }\n this.off();\n }\n hasPendingRequest() {\n return this.request || this.mediaRequest_;\n }\n stopRequest() {\n if (this.request) {\n const oldRequest = this.request;\n this.request = null;\n oldRequest.onreadystatechange = null;\n oldRequest.abort();\n }\n }\n media(playlist) {\n // getter\n if (!playlist) {\n return this.media_;\n } // setter\n\n if (this.state === 'HAVE_NOTHING') {\n throw new Error('Cannot switch media playlist from ' + this.state);\n }\n const startingState = this.state; // find the playlist object if the target playlist has been specified by URI\n\n if (typeof playlist === 'string') {\n if (!this.mainPlaylistLoader_.main.playlists[playlist]) {\n throw new Error('Unknown playlist URI: ' + playlist);\n }\n playlist = this.mainPlaylistLoader_.main.playlists[playlist];\n }\n const mediaChange = !this.media_ || playlist.id !== this.media_.id; // switch to previously loaded playlists immediately\n\n if (mediaChange && this.loadedPlaylists_[playlist.id] && this.loadedPlaylists_[playlist.id].endList) {\n this.state = 'HAVE_METADATA';\n this.media_ = playlist; // trigger media change if the active media has been updated\n\n if (mediaChange) {\n this.trigger('mediachanging');\n this.trigger('mediachange');\n }\n return;\n } // switching to the active playlist is a no-op\n\n if (!mediaChange) {\n return;\n } // switching from an already loaded playlist\n\n if (this.media_) {\n this.trigger('mediachanging');\n }\n this.addSidxSegments_(playlist, startingState, sidxChanged => {\n // everything is ready just continue to haveMetadata\n this.haveMetadata({\n startingState,\n playlist\n });\n });\n }\n haveMetadata({\n startingState,\n playlist\n }) {\n this.state = 'HAVE_METADATA';\n this.loadedPlaylists_[playlist.id] = playlist;\n this.mediaRequest_ = null; // This will trigger loadedplaylist\n\n this.refreshMedia_(playlist.id); // fire loadedmetadata the first time a media playlist is loaded\n // to resolve setup of media groups\n\n if (startingState === 'HAVE_MAIN_MANIFEST') {\n this.trigger('loadedmetadata');\n } else {\n // trigger media change if the active media has been updated\n this.trigger('mediachange');\n }\n }\n pause() {\n if (this.mainPlaylistLoader_.createMupOnMedia_) {\n this.off('loadedmetadata', this.mainPlaylistLoader_.createMupOnMedia_);\n this.mainPlaylistLoader_.createMupOnMedia_ = null;\n }\n this.stopRequest();\n window.clearTimeout(this.mediaUpdateTimeout);\n this.mediaUpdateTimeout = null;\n if (this.isMain_) {\n window.clearTimeout(this.mainPlaylistLoader_.minimumUpdatePeriodTimeout_);\n this.mainPlaylistLoader_.minimumUpdatePeriodTimeout_ = null;\n }\n if (this.state === 'HAVE_NOTHING') {\n // If we pause the loader before any data has been retrieved, its as if we never\n // started, so reset to an unstarted state.\n this.started = false;\n }\n }\n load(isFinalRendition) {\n window.clearTimeout(this.mediaUpdateTimeout);\n this.mediaUpdateTimeout = null;\n const media = this.media();\n if (isFinalRendition) {\n const delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n this.mediaUpdateTimeout = window.setTimeout(() => this.load(), delay);\n return;\n } // because the playlists are internal to the manifest, load should either load the\n // main manifest, or do nothing but trigger an event\n\n if (!this.started) {\n this.start();\n return;\n }\n if (media && !media.endList) {\n // Check to see if this is the main loader and the MUP was cleared (this happens\n // when the loader was paused). `media` should be set at this point since one is always\n // set during `start()`.\n if (this.isMain_ && !this.minimumUpdatePeriodTimeout_) {\n // Trigger minimumUpdatePeriod to refresh the main manifest\n this.trigger('minimumUpdatePeriod'); // Since there was no prior minimumUpdatePeriodTimeout it should be recreated\n\n this.updateMinimumUpdatePeriodTimeout_();\n }\n this.trigger('mediaupdatetimeout');\n } else {\n this.trigger('loadedplaylist');\n }\n }\n start() {\n this.started = true; // We don't need to request the main manifest again\n // Call this asynchronously to match the xhr request behavior below\n\n if (!this.isMain_) {\n this.mediaRequest_ = window.setTimeout(() => this.haveMain_(), 0);\n return;\n }\n this.requestMain_((req, mainChanged) => {\n this.haveMain_();\n if (!this.hasPendingRequest() && !this.media_) {\n this.media(this.mainPlaylistLoader_.main.playlists[0]);\n }\n });\n }\n requestMain_(cb) {\n this.request = this.vhs_.xhr({\n uri: this.mainPlaylistLoader_.srcUrl,\n withCredentials: this.withCredentials\n }, (error, req) => {\n if (this.requestErrored_(error, req)) {\n if (this.state === 'HAVE_NOTHING') {\n this.started = false;\n }\n return;\n }\n const mainChanged = req.responseText !== this.mainPlaylistLoader_.mainXml_;\n this.mainPlaylistLoader_.mainXml_ = req.responseText;\n if (req.responseHeaders && req.responseHeaders.date) {\n this.mainLoaded_ = Date.parse(req.responseHeaders.date);\n } else {\n this.mainLoaded_ = Date.now();\n }\n this.mainPlaylistLoader_.srcUrl = resolveManifestRedirect(this.mainPlaylistLoader_.srcUrl, req);\n if (mainChanged) {\n this.handleMain_();\n this.syncClientServerClock_(() => {\n return cb(req, mainChanged);\n });\n return;\n }\n return cb(req, mainChanged);\n });\n }\n /**\n * Parses the main xml for UTCTiming node to sync the client clock to the server\n * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.\n *\n * @param {Function} done\n * Function to call when clock sync has completed\n */\n\n syncClientServerClock_(done) {\n const utcTiming = parseUTCTiming(this.mainPlaylistLoader_.mainXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the\n // server clock\n\n if (utcTiming === null) {\n this.mainPlaylistLoader_.clientOffset_ = this.mainLoaded_ - Date.now();\n return done();\n }\n if (utcTiming.method === 'DIRECT') {\n this.mainPlaylistLoader_.clientOffset_ = utcTiming.value - Date.now();\n return done();\n }\n this.request = this.vhs_.xhr({\n uri: resolveUrl(this.mainPlaylistLoader_.srcUrl, utcTiming.value),\n method: utcTiming.method,\n withCredentials: this.withCredentials\n }, (error, req) => {\n // disposed\n if (!this.request) {\n return;\n }\n if (error) {\n // sync request failed, fall back to using date header from mpd\n // TODO: log warning\n this.mainPlaylistLoader_.clientOffset_ = this.mainLoaded_ - Date.now();\n return done();\n }\n let serverTime;\n if (utcTiming.method === 'HEAD') {\n if (!req.responseHeaders || !req.responseHeaders.date) {\n // expected date header not preset, fall back to using date header from mpd\n // TODO: log warning\n serverTime = this.mainLoaded_;\n } else {\n serverTime = Date.parse(req.responseHeaders.date);\n }\n } else {\n serverTime = Date.parse(req.responseText);\n }\n this.mainPlaylistLoader_.clientOffset_ = serverTime - Date.now();\n done();\n });\n }\n haveMain_() {\n this.state = 'HAVE_MAIN_MANIFEST';\n if (this.isMain_) {\n // We have the main playlist at this point, so\n // trigger this to allow PlaylistController\n // to make an initial playlist selection\n this.trigger('loadedplaylist');\n } else if (!this.media_) {\n // no media playlist was specifically selected so select\n // the one the child playlist loader was created with\n this.media(this.childPlaylist_);\n }\n }\n handleMain_() {\n // clear media request\n this.mediaRequest_ = null;\n const oldMain = this.mainPlaylistLoader_.main;\n let newMain = parseMainXml({\n mainXml: this.mainPlaylistLoader_.mainXml_,\n srcUrl: this.mainPlaylistLoader_.srcUrl,\n clientOffset: this.mainPlaylistLoader_.clientOffset_,\n sidxMapping: this.mainPlaylistLoader_.sidxMapping_,\n previousManifest: oldMain\n }); // if we have an old main to compare the new main against\n\n if (oldMain) {\n newMain = updateMain(oldMain, newMain, this.mainPlaylistLoader_.sidxMapping_);\n } // only update main if we have a new main\n\n this.mainPlaylistLoader_.main = newMain ? newMain : oldMain;\n const location = this.mainPlaylistLoader_.main.locations && this.mainPlaylistLoader_.main.locations[0];\n if (location && location !== this.mainPlaylistLoader_.srcUrl) {\n this.mainPlaylistLoader_.srcUrl = location;\n }\n if (!oldMain || newMain && newMain.minimumUpdatePeriod !== oldMain.minimumUpdatePeriod) {\n this.updateMinimumUpdatePeriodTimeout_();\n }\n return Boolean(newMain);\n }\n updateMinimumUpdatePeriodTimeout_() {\n const mpl = this.mainPlaylistLoader_; // cancel any pending creation of mup on media\n // a new one will be added if needed.\n\n if (mpl.createMupOnMedia_) {\n mpl.off('loadedmetadata', mpl.createMupOnMedia_);\n mpl.createMupOnMedia_ = null;\n } // clear any pending timeouts\n\n if (mpl.minimumUpdatePeriodTimeout_) {\n window.clearTimeout(mpl.minimumUpdatePeriodTimeout_);\n mpl.minimumUpdatePeriodTimeout_ = null;\n }\n let mup = mpl.main && mpl.main.minimumUpdatePeriod; // If the minimumUpdatePeriod has a value of 0, that indicates that the current\n // MPD has no future validity, so a new one will need to be acquired when new\n // media segments are to be made available. Thus, we use the target duration\n // in this case\n\n if (mup === 0) {\n if (mpl.media()) {\n mup = mpl.media().targetDuration * 1000;\n } else {\n mpl.createMupOnMedia_ = mpl.updateMinimumUpdatePeriodTimeout_;\n mpl.one('loadedmetadata', mpl.createMupOnMedia_);\n }\n } // if minimumUpdatePeriod is invalid or <= zero, which\n // can happen when a live video becomes VOD. skip timeout\n // creation.\n\n if (typeof mup !== 'number' || mup <= 0) {\n if (mup < 0) {\n this.logger_(`found invalid minimumUpdatePeriod of ${mup}, not setting a timeout`);\n }\n return;\n }\n this.createMUPTimeout_(mup);\n }\n createMUPTimeout_(mup) {\n const mpl = this.mainPlaylistLoader_;\n mpl.minimumUpdatePeriodTimeout_ = window.setTimeout(() => {\n mpl.minimumUpdatePeriodTimeout_ = null;\n mpl.trigger('minimumUpdatePeriod');\n mpl.createMUPTimeout_(mup);\n }, mup);\n }\n /**\n * Sends request to refresh the main xml and updates the parsed main manifest\n */\n\n refreshXml_() {\n this.requestMain_((req, mainChanged) => {\n if (!mainChanged) {\n return;\n }\n if (this.media_) {\n this.media_ = this.mainPlaylistLoader_.main.playlists[this.media_.id];\n } // This will filter out updated sidx info from the mapping\n\n this.mainPlaylistLoader_.sidxMapping_ = filterChangedSidxMappings(this.mainPlaylistLoader_.main, this.mainPlaylistLoader_.sidxMapping_);\n this.addSidxSegments_(this.media(), this.state, sidxChanged => {\n // TODO: do we need to reload the current playlist?\n this.refreshMedia_(this.media().id);\n });\n });\n }\n /**\n * Refreshes the media playlist by re-parsing the main xml and updating playlist\n * references. If this is an alternate loader, the updated parsed manifest is retrieved\n * from the main loader.\n */\n\n refreshMedia_(mediaID) {\n if (!mediaID) {\n throw new Error('refreshMedia_ must take a media id');\n } // for main we have to reparse the main xml\n // to re-create segments based on current timing values\n // which may change media. We only skip updating the main manifest\n // if this is the first time this.media_ is being set.\n // as main was just parsed in that case.\n\n if (this.media_ && this.isMain_) {\n this.handleMain_();\n }\n const playlists = this.mainPlaylistLoader_.main.playlists;\n const mediaChanged = !this.media_ || this.media_ !== playlists[mediaID];\n if (mediaChanged) {\n this.media_ = playlists[mediaID];\n } else {\n this.trigger('playlistunchanged');\n }\n if (!this.mediaUpdateTimeout) {\n const createMediaUpdateTimeout = () => {\n if (this.media().endList) {\n return;\n }\n this.mediaUpdateTimeout = window.setTimeout(() => {\n this.trigger('mediaupdatetimeout');\n createMediaUpdateTimeout();\n }, refreshDelay(this.media(), Boolean(mediaChanged)));\n };\n createMediaUpdateTimeout();\n }\n this.trigger('loadedplaylist');\n }\n }\n var Config = {\n GOAL_BUFFER_LENGTH: 30,\n MAX_GOAL_BUFFER_LENGTH: 60,\n BACK_BUFFER_LENGTH: 30,\n GOAL_BUFFER_LENGTH_RATE: 1,\n // 0.5 MB/s\n INITIAL_BANDWIDTH: 4194304,\n // A fudge factor to apply to advertised playlist bitrates to account for\n // temporary flucations in client bandwidth\n BANDWIDTH_VARIANCE: 1.2,\n // How much of the buffer must be filled before we consider upswitching\n BUFFER_LOW_WATER_LINE: 0,\n MAX_BUFFER_LOW_WATER_LINE: 30,\n // TODO: Remove this when experimentalBufferBasedABR is removed\n EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE: 16,\n BUFFER_LOW_WATER_LINE_RATE: 1,\n // If the buffer is greater than the high water line, we won't switch down\n BUFFER_HIGH_WATER_LINE: 30\n };\n const stringToArrayBuffer = string => {\n const view = new Uint8Array(new ArrayBuffer(string.length));\n for (let i = 0; i < string.length; i++) {\n view[i] = string.charCodeAt(i);\n }\n return view.buffer;\n };\n\n /* global Blob, BlobBuilder, Worker */\n // unify worker interface\n const browserWorkerPolyFill = function (workerObj) {\n // node only supports on/off\n workerObj.on = workerObj.addEventListener;\n workerObj.off = workerObj.removeEventListener;\n return workerObj;\n };\n const createObjectURL = function (str) {\n try {\n return URL.createObjectURL(new Blob([str], {\n type: 'application/javascript'\n }));\n } catch (e) {\n const blob = new BlobBuilder();\n blob.append(str);\n return URL.createObjectURL(blob.getBlob());\n }\n };\n const factory = function (code) {\n return function () {\n const objectUrl = createObjectURL(code);\n const worker = browserWorkerPolyFill(new Worker(objectUrl));\n worker.objURL = objectUrl;\n const terminate = worker.terminate;\n worker.on = worker.addEventListener;\n worker.off = worker.removeEventListener;\n worker.terminate = function () {\n URL.revokeObjectURL(objectUrl);\n return terminate.call(this);\n };\n return worker;\n };\n };\n const transform = function (code) {\n return `var browserWorkerPolyFill = ${browserWorkerPolyFill.toString()};\\n` + 'browserWorkerPolyFill(self);\\n' + code;\n };\n const getWorkerString = function (fn) {\n return fn.toString().replace(/^function.+?{/, '').slice(0, -1);\n };\n\n /* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n const workerCode$1 = transform(getWorkerString(function () {\n var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * A lightweight readable stream implemention that handles event dispatching.\n * Objects that inherit from streams should call init in their constructors.\n */\n\n var Stream$8 = function () {\n this.init = function () {\n var listeners = {};\n /**\n * Add a listener for a specified event type.\n * @param type {string} the event name\n * @param listener {function} the callback to be invoked when an event of\n * the specified type occurs\n */\n\n this.on = function (type, listener) {\n if (!listeners[type]) {\n listeners[type] = [];\n }\n listeners[type] = listeners[type].concat(listener);\n };\n /**\n * Remove a listener for a specified event type.\n * @param type {string} the event name\n * @param listener {function} a function previously registered for this\n * type of event through `on`\n */\n\n this.off = function (type, listener) {\n var index;\n if (!listeners[type]) {\n return false;\n }\n index = listeners[type].indexOf(listener);\n listeners[type] = listeners[type].slice();\n listeners[type].splice(index, 1);\n return index > -1;\n };\n /**\n * Trigger an event of the specified type on this stream. Any additional\n * arguments to this function are passed as parameters to event listeners.\n * @param type {string} the event name\n */\n\n this.trigger = function (type) {\n var callbacks, i, length, args;\n callbacks = listeners[type];\n if (!callbacks) {\n return;\n } // Slicing the arguments on every invocation of this method\n // can add a significant amount of overhead. Avoid the\n // intermediate object creation for the common case of a\n // single callback argument\n\n if (arguments.length === 2) {\n length = callbacks.length;\n for (i = 0; i < length; ++i) {\n callbacks[i].call(this, arguments[1]);\n }\n } else {\n args = [];\n i = arguments.length;\n for (i = 1; i < arguments.length; ++i) {\n args.push(arguments[i]);\n }\n length = callbacks.length;\n for (i = 0; i < length; ++i) {\n callbacks[i].apply(this, args);\n }\n }\n };\n /**\n * Destroys the stream and cleans up.\n */\n\n this.dispose = function () {\n listeners = {};\n };\n };\n };\n /**\n * Forwards all `data` events on this stream to the destination stream. The\n * destination stream should provide a method `push` to receive the data\n * events as they arrive.\n * @param destination {stream} the stream that will receive all `data` events\n * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n * when the current stream emits a 'done' event\n * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n */\n\n Stream$8.prototype.pipe = function (destination) {\n this.on('data', function (data) {\n destination.push(data);\n });\n this.on('done', function (flushSource) {\n destination.flush(flushSource);\n });\n this.on('partialdone', function (flushSource) {\n destination.partialFlush(flushSource);\n });\n this.on('endedtimeline', function (flushSource) {\n destination.endTimeline(flushSource);\n });\n this.on('reset', function (flushSource) {\n destination.reset(flushSource);\n });\n return destination;\n }; // Default stream functions that are expected to be overridden to perform\n // actual work. These are provided by the prototype as a sort of no-op\n // implementation so that we don't have to check for their existence in the\n // `pipe` function above.\n\n Stream$8.prototype.push = function (data) {\n this.trigger('data', data);\n };\n Stream$8.prototype.flush = function (flushSource) {\n this.trigger('done', flushSource);\n };\n Stream$8.prototype.partialFlush = function (flushSource) {\n this.trigger('partialdone', flushSource);\n };\n Stream$8.prototype.endTimeline = function (flushSource) {\n this.trigger('endedtimeline', flushSource);\n };\n Stream$8.prototype.reset = function (flushSource) {\n this.trigger('reset', flushSource);\n };\n var stream = Stream$8;\n var MAX_UINT32$1 = Math.pow(2, 32);\n var getUint64$3 = function (uint8) {\n var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n var value;\n if (dv.getBigUint64) {\n value = dv.getBigUint64(0);\n if (value < Number.MAX_SAFE_INTEGER) {\n return Number(value);\n }\n return value;\n }\n return dv.getUint32(0) * MAX_UINT32$1 + dv.getUint32(4);\n };\n var numbers = {\n getUint64: getUint64$3,\n MAX_UINT32: MAX_UINT32$1\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Functions that generate fragmented MP4s suitable for use with Media\n * Source Extensions.\n */\n\n var MAX_UINT32 = numbers.MAX_UINT32;\n var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun$1, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants\n\n (function () {\n var i;\n types = {\n avc1: [],\n // codingname\n avcC: [],\n btrt: [],\n dinf: [],\n dref: [],\n esds: [],\n ftyp: [],\n hdlr: [],\n mdat: [],\n mdhd: [],\n mdia: [],\n mfhd: [],\n minf: [],\n moof: [],\n moov: [],\n mp4a: [],\n // codingname\n mvex: [],\n mvhd: [],\n pasp: [],\n sdtp: [],\n smhd: [],\n stbl: [],\n stco: [],\n stsc: [],\n stsd: [],\n stsz: [],\n stts: [],\n styp: [],\n tfdt: [],\n tfhd: [],\n traf: [],\n trak: [],\n trun: [],\n trex: [],\n tkhd: [],\n vmhd: []\n }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n // don't throw an error\n\n if (typeof Uint8Array === 'undefined') {\n return;\n }\n for (i in types) {\n if (types.hasOwnProperty(i)) {\n types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];\n }\n }\n MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);\n AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);\n MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n VIDEO_HDLR = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x00,\n // pre_defined\n 0x76, 0x69, 0x64, 0x65,\n // handler_type: 'vide'\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n ]);\n\n AUDIO_HDLR = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x00,\n // pre_defined\n 0x73, 0x6f, 0x75, 0x6e,\n // handler_type: 'soun'\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n ]);\n\n HDLR_TYPES = {\n video: VIDEO_HDLR,\n audio: AUDIO_HDLR\n };\n DREF = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x01,\n // entry_count\n 0x00, 0x00, 0x00, 0x0c,\n // entry_size\n 0x75, 0x72, 0x6c, 0x20,\n // 'url' type\n 0x00,\n // version 0\n 0x00, 0x00, 0x01 // entry_flags\n ]);\n\n SMHD = new Uint8Array([0x00,\n // version\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00,\n // balance, 0 means centered\n 0x00, 0x00 // reserved\n ]);\n\n STCO = new Uint8Array([0x00,\n // version\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x00 // entry_count\n ]);\n\n STSC = STCO;\n STSZ = new Uint8Array([0x00,\n // version\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x00,\n // sample_size\n 0x00, 0x00, 0x00, 0x00 // sample_count\n ]);\n\n STTS = STCO;\n VMHD = new Uint8Array([0x00,\n // version\n 0x00, 0x00, 0x01,\n // flags\n 0x00, 0x00,\n // graphicsmode\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor\n ]);\n })();\n\n box = function (type) {\n var payload = [],\n size = 0,\n i,\n result,\n view;\n for (i = 1; i < arguments.length; i++) {\n payload.push(arguments[i]);\n }\n i = payload.length; // calculate the total size we need to allocate\n\n while (i--) {\n size += payload[i].byteLength;\n }\n result = new Uint8Array(size + 8);\n view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n view.setUint32(0, result.byteLength);\n result.set(type, 4); // copy the payload into the result\n\n for (i = 0, size = 8; i < payload.length; i++) {\n result.set(payload[i], size);\n size += payload[i].byteLength;\n }\n return result;\n };\n dinf = function () {\n return box(types.dinf, box(types.dref, DREF));\n };\n esds = function (track) {\n return box(types.esds, new Uint8Array([0x00,\n // version\n 0x00, 0x00, 0x00,\n // flags\n // ES_Descriptor\n 0x03,\n // tag, ES_DescrTag\n 0x19,\n // length\n 0x00, 0x00,\n // ES_ID\n 0x00,\n // streamDependenceFlag, URL_flag, reserved, streamPriority\n // DecoderConfigDescriptor\n 0x04,\n // tag, DecoderConfigDescrTag\n 0x11,\n // length\n 0x40,\n // object type\n 0x15,\n // streamType\n 0x00, 0x06, 0x00,\n // bufferSizeDB\n 0x00, 0x00, 0xda, 0xc0,\n // maxBitrate\n 0x00, 0x00, 0xda, 0xc0,\n // avgBitrate\n // DecoderSpecificInfo\n 0x05,\n // tag, DecoderSpecificInfoTag\n 0x02,\n // length\n // ISO/IEC 14496-3, AudioSpecificConfig\n // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig\n ]));\n };\n\n ftyp = function () {\n return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n };\n hdlr = function (type) {\n return box(types.hdlr, HDLR_TYPES[type]);\n };\n mdat = function (data) {\n return box(types.mdat, data);\n };\n mdhd = function (track) {\n var result = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x02,\n // creation_time\n 0x00, 0x00, 0x00, 0x03,\n // modification_time\n 0x00, 0x01, 0x5f, 0x90,\n // timescale, 90,000 \"ticks\" per second\n track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF,\n // duration\n 0x55, 0xc4,\n // 'und' language (undetermined)\n 0x00, 0x00]); // Use the sample rate from the track metadata, when it is\n // defined. The sample rate can be parsed out of an ADTS header, for\n // instance.\n\n if (track.samplerate) {\n result[12] = track.samplerate >>> 24 & 0xFF;\n result[13] = track.samplerate >>> 16 & 0xFF;\n result[14] = track.samplerate >>> 8 & 0xFF;\n result[15] = track.samplerate & 0xFF;\n }\n return box(types.mdhd, result);\n };\n mdia = function (track) {\n return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n };\n mfhd = function (sequenceNumber) {\n return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00,\n // flags\n (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number\n ]));\n };\n\n minf = function (track) {\n return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));\n };\n moof = function (sequenceNumber, tracks) {\n var trackFragments = [],\n i = tracks.length; // build traf boxes for each track fragment\n\n while (i--) {\n trackFragments[i] = traf(tracks[i]);\n }\n return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));\n };\n /**\n * Returns a movie box.\n * @param tracks {array} the tracks associated with this movie\n * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n */\n\n moov = function (tracks) {\n var i = tracks.length,\n boxes = [];\n while (i--) {\n boxes[i] = trak(tracks[i]);\n }\n return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n };\n mvex = function (tracks) {\n var i = tracks.length,\n boxes = [];\n while (i--) {\n boxes[i] = trex(tracks[i]);\n }\n return box.apply(null, [types.mvex].concat(boxes));\n };\n mvhd = function (duration) {\n var bytes = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x01,\n // creation_time\n 0x00, 0x00, 0x00, 0x02,\n // modification_time\n 0x00, 0x01, 0x5f, 0x90,\n // timescale, 90,000 \"ticks\" per second\n (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF,\n // duration\n 0x00, 0x01, 0x00, 0x00,\n // 1.0 rate\n 0x01, 0x00,\n // 1.0 volume\n 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,\n // transformation: unity matrix\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n // pre_defined\n 0xff, 0xff, 0xff, 0xff // next_track_ID\n ]);\n\n return box(types.mvhd, bytes);\n };\n sdtp = function (track) {\n var samples = track.samples || [],\n bytes = new Uint8Array(4 + samples.length),\n flags,\n i; // leave the full box header (4 bytes) all zero\n // write the sample table\n\n for (i = 0; i < samples.length; i++) {\n flags = samples[i].flags;\n bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;\n }\n return box(types.sdtp, bytes);\n };\n stbl = function (track) {\n return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));\n };\n (function () {\n var videoSample, audioSample;\n stsd = function (track) {\n return box(types.stsd, new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n 0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));\n };\n videoSample = function (track) {\n var sps = track.sps || [],\n pps = track.pps || [],\n sequenceParameterSets = [],\n pictureParameterSets = [],\n i,\n avc1Box; // assemble the SPSs\n\n for (i = 0; i < sps.length; i++) {\n sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength\n\n sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n } // assemble the PPSs\n\n for (i = 0; i < pps.length; i++) {\n pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n pictureParameterSets.push(pps[i].byteLength & 0xFF);\n pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n }\n avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x01,\n // data_reference_index\n 0x00, 0x00,\n // pre_defined\n 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n // pre_defined\n (track.width & 0xff00) >> 8, track.width & 0xff,\n // width\n (track.height & 0xff00) >> 8, track.height & 0xff,\n // height\n 0x00, 0x48, 0x00, 0x00,\n // horizresolution\n 0x00, 0x48, 0x00, 0x00,\n // vertresolution\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x01,\n // frame_count\n 0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n // compressorname\n 0x00, 0x18,\n // depth = 24\n 0x11, 0x11 // pre_defined = -1\n ]), box(types.avcC, new Uint8Array([0x01,\n // configurationVersion\n track.profileIdc,\n // AVCProfileIndication\n track.profileCompatibility,\n // profile_compatibility\n track.levelIdc,\n // AVCLevelIndication\n 0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n ].concat([sps.length],\n // numOfSequenceParameterSets\n sequenceParameterSets,\n // \"SPS\"\n [pps.length],\n // numOfPictureParameterSets\n pictureParameterSets // \"PPS\"\n ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80,\n // bufferSizeDB\n 0x00, 0x2d, 0xc6, 0xc0,\n // maxBitrate\n 0x00, 0x2d, 0xc6, 0xc0 // avgBitrate\n ]))];\n\n if (track.sarRatio) {\n var hSpacing = track.sarRatio[0],\n vSpacing = track.sarRatio[1];\n avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));\n }\n return box.apply(null, avc1Box);\n };\n audioSample = function (track) {\n return box(types.mp4a, new Uint8Array([\n // SampleEntry, ISO/IEC 14496-12\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x01,\n // data_reference_index\n // AudioSampleEntry, ISO/IEC 14496-12\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff,\n // channelcount\n (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff,\n // samplesize\n 0x00, 0x00,\n // pre_defined\n 0x00, 0x00,\n // reserved\n (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16\n // MP4AudioSampleEntry, ISO/IEC 14496-14\n ]), esds(track));\n };\n })();\n tkhd = function (track) {\n var result = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x07,\n // flags\n 0x00, 0x00, 0x00, 0x00,\n // creation_time\n 0x00, 0x00, 0x00, 0x00,\n // modification_time\n (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF,\n // track_ID\n 0x00, 0x00, 0x00, 0x00,\n // reserved\n (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF,\n // duration\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n // reserved\n 0x00, 0x00,\n // layer\n 0x00, 0x00,\n // alternate_group\n 0x01, 0x00,\n // non-audio track volume\n 0x00, 0x00,\n // reserved\n 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,\n // transformation: unity matrix\n (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00,\n // width\n (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height\n ]);\n\n return box(types.tkhd, result);\n };\n /**\n * Generate a track fragment (traf) box. A traf box collects metadata\n * about tracks in a movie fragment (moof) box.\n */\n\n traf = function (track) {\n var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x3a,\n // flags\n (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF,\n // track_ID\n 0x00, 0x00, 0x00, 0x01,\n // sample_description_index\n 0x00, 0x00, 0x00, 0x00,\n // default_sample_duration\n 0x00, 0x00, 0x00, 0x00,\n // default_sample_size\n 0x00, 0x00, 0x00, 0x00 // default_sample_flags\n ]));\n\n upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / MAX_UINT32);\n lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % MAX_UINT32);\n trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01,\n // version 1\n 0x00, 0x00, 0x00,\n // flags\n // baseMediaDecodeTime\n upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of\n // the containing moof to the first payload byte of the associated\n // mdat\n\n dataOffset = 32 +\n // tfhd\n 20 +\n // tfdt\n 8 +\n // traf header\n 16 +\n // mfhd\n 8 +\n // moof header\n 8; // mdat header\n // audio tracks require less metadata\n\n if (track.type === 'audio') {\n trackFragmentRun = trun$1(track, dataOffset);\n return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);\n } // video tracks should contain an independent and disposable samples\n // box (sdtp)\n // generate one and adjust offsets to match\n\n sampleDependencyTable = sdtp(track);\n trackFragmentRun = trun$1(track, sampleDependencyTable.length + dataOffset);\n return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);\n };\n /**\n * Generate a track box.\n * @param track {object} a track definition\n * @return {Uint8Array} the track box\n */\n\n trak = function (track) {\n track.duration = track.duration || 0xffffffff;\n return box(types.trak, tkhd(track), mdia(track));\n };\n trex = function (track) {\n var result = new Uint8Array([0x00,\n // version 0\n 0x00, 0x00, 0x00,\n // flags\n (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF,\n // track_ID\n 0x00, 0x00, 0x00, 0x01,\n // default_sample_description_index\n 0x00, 0x00, 0x00, 0x00,\n // default_sample_duration\n 0x00, 0x00, 0x00, 0x00,\n // default_sample_size\n 0x00, 0x01, 0x00, 0x01 // default_sample_flags\n ]); // the last two bytes of default_sample_flags is the sample\n // degradation priority, a hint about the importance of this sample\n // relative to others. Lower the degradation priority for all sample\n // types other than video.\n\n if (track.type !== 'video') {\n result[result.length - 1] = 0x00;\n }\n return box(types.trex, result);\n };\n (function () {\n var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a\n // duration is present for the first sample, it will be present for\n // all subsequent samples.\n // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n\n trunHeader = function (samples, offset) {\n var durationPresent = 0,\n sizePresent = 0,\n flagsPresent = 0,\n compositionTimeOffset = 0; // trun flag constants\n\n if (samples.length) {\n if (samples[0].duration !== undefined) {\n durationPresent = 0x1;\n }\n if (samples[0].size !== undefined) {\n sizePresent = 0x2;\n }\n if (samples[0].flags !== undefined) {\n flagsPresent = 0x4;\n }\n if (samples[0].compositionTimeOffset !== undefined) {\n compositionTimeOffset = 0x8;\n }\n }\n return [0x00,\n // version 0\n 0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01,\n // flags\n (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF,\n // sample_count\n (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset\n ];\n };\n\n videoTrun = function (track, offset) {\n var bytesOffest, bytes, header, samples, sample, i;\n samples = track.samples || [];\n offset += 8 + 12 + 16 * samples.length;\n header = trunHeader(samples, offset);\n bytes = new Uint8Array(header.length + samples.length * 16);\n bytes.set(header);\n bytesOffest = header.length;\n for (i = 0; i < samples.length; i++) {\n sample = samples[i];\n bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n\n bytes[bytesOffest++] = sample.flags.isLeading << 2 | sample.flags.dependsOn;\n bytes[bytesOffest++] = sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample;\n bytes[bytesOffest++] = sample.flags.degradationPriority & 0xF0 << 8;\n bytes[bytesOffest++] = sample.flags.degradationPriority & 0x0F; // sample_flags\n\n bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF000000) >>> 24;\n bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF0000) >>> 16;\n bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF00) >>> 8;\n bytes[bytesOffest++] = sample.compositionTimeOffset & 0xFF; // sample_composition_time_offset\n }\n\n return box(types.trun, bytes);\n };\n audioTrun = function (track, offset) {\n var bytes, bytesOffest, header, samples, sample, i;\n samples = track.samples || [];\n offset += 8 + 12 + 8 * samples.length;\n header = trunHeader(samples, offset);\n bytes = new Uint8Array(header.length + samples.length * 8);\n bytes.set(header);\n bytesOffest = header.length;\n for (i = 0; i < samples.length; i++) {\n sample = samples[i];\n bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n }\n\n return box(types.trun, bytes);\n };\n trun$1 = function (track, offset) {\n if (track.type === 'audio') {\n return audioTrun(track, offset);\n }\n return videoTrun(track, offset);\n };\n })();\n var mp4Generator = {\n ftyp: ftyp,\n mdat: mdat,\n moof: moof,\n moov: moov,\n initSegment: function (tracks) {\n var fileType = ftyp(),\n movie = moov(tracks),\n result;\n result = new Uint8Array(fileType.byteLength + movie.byteLength);\n result.set(fileType);\n result.set(movie, fileType.byteLength);\n return result;\n }\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n // composed of the nal units that make up that frame\n // Also keep track of cummulative data about the frame from the nal units such\n // as the frame duration, starting pts, etc.\n\n var groupNalsIntoFrames = function (nalUnits) {\n var i,\n currentNal,\n currentFrame = [],\n frames = []; // TODO added for LHLS, make sure this is OK\n\n frames.byteLength = 0;\n frames.nalCount = 0;\n frames.duration = 0;\n currentFrame.byteLength = 0;\n for (i = 0; i < nalUnits.length; i++) {\n currentNal = nalUnits[i]; // Split on 'aud'-type nal units\n\n if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n // Since the very first nal unit is expected to be an AUD\n // only push to the frames array when currentFrame is not empty\n if (currentFrame.length) {\n currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK\n\n frames.byteLength += currentFrame.byteLength;\n frames.nalCount += currentFrame.length;\n frames.duration += currentFrame.duration;\n frames.push(currentFrame);\n }\n currentFrame = [currentNal];\n currentFrame.byteLength = currentNal.data.byteLength;\n currentFrame.pts = currentNal.pts;\n currentFrame.dts = currentNal.dts;\n } else {\n // Specifically flag key frames for ease of use later\n if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n currentFrame.keyFrame = true;\n }\n currentFrame.duration = currentNal.dts - currentFrame.dts;\n currentFrame.byteLength += currentNal.data.byteLength;\n currentFrame.push(currentNal);\n }\n } // For the last frame, use the duration of the previous frame if we\n // have nothing better to go on\n\n if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {\n currentFrame.duration = frames[frames.length - 1].duration;\n } // Push the final frame\n // TODO added for LHLS, make sure this is OK\n\n frames.byteLength += currentFrame.byteLength;\n frames.nalCount += currentFrame.length;\n frames.duration += currentFrame.duration;\n frames.push(currentFrame);\n return frames;\n }; // Convert an array of frames into an array of Gop with each Gop being composed\n // of the frames that make up that Gop\n // Also keep track of cummulative data about the Gop from the frames such as the\n // Gop duration, starting pts, etc.\n\n var groupFramesIntoGops = function (frames) {\n var i,\n currentFrame,\n currentGop = [],\n gops = []; // We must pre-set some of the values on the Gop since we\n // keep running totals of these values\n\n currentGop.byteLength = 0;\n currentGop.nalCount = 0;\n currentGop.duration = 0;\n currentGop.pts = frames[0].pts;\n currentGop.dts = frames[0].dts; // store some metadata about all the Gops\n\n gops.byteLength = 0;\n gops.nalCount = 0;\n gops.duration = 0;\n gops.pts = frames[0].pts;\n gops.dts = frames[0].dts;\n for (i = 0; i < frames.length; i++) {\n currentFrame = frames[i];\n if (currentFrame.keyFrame) {\n // Since the very first frame is expected to be an keyframe\n // only push to the gops array when currentGop is not empty\n if (currentGop.length) {\n gops.push(currentGop);\n gops.byteLength += currentGop.byteLength;\n gops.nalCount += currentGop.nalCount;\n gops.duration += currentGop.duration;\n }\n currentGop = [currentFrame];\n currentGop.nalCount = currentFrame.length;\n currentGop.byteLength = currentFrame.byteLength;\n currentGop.pts = currentFrame.pts;\n currentGop.dts = currentFrame.dts;\n currentGop.duration = currentFrame.duration;\n } else {\n currentGop.duration += currentFrame.duration;\n currentGop.nalCount += currentFrame.length;\n currentGop.byteLength += currentFrame.byteLength;\n currentGop.push(currentFrame);\n }\n }\n if (gops.length && currentGop.duration <= 0) {\n currentGop.duration = gops[gops.length - 1].duration;\n }\n gops.byteLength += currentGop.byteLength;\n gops.nalCount += currentGop.nalCount;\n gops.duration += currentGop.duration; // push the final Gop\n\n gops.push(currentGop);\n return gops;\n };\n /*\n * Search for the first keyframe in the GOPs and throw away all frames\n * until that keyframe. Then extend the duration of the pulled keyframe\n * and pull the PTS and DTS of the keyframe so that it covers the time\n * range of the frames that were disposed.\n *\n * @param {Array} gops video GOPs\n * @returns {Array} modified video GOPs\n */\n\n var extendFirstKeyFrame = function (gops) {\n var currentGop;\n if (!gops[0][0].keyFrame && gops.length > 1) {\n // Remove the first GOP\n currentGop = gops.shift();\n gops.byteLength -= currentGop.byteLength;\n gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the\n // first gop to cover the time period of the\n // frames we just removed\n\n gops[0][0].dts = currentGop.dts;\n gops[0][0].pts = currentGop.pts;\n gops[0][0].duration += currentGop.duration;\n }\n return gops;\n };\n /**\n * Default sample object\n * see ISO/IEC 14496-12:2012, section 8.6.4.3\n */\n\n var createDefaultSample = function () {\n return {\n size: 0,\n flags: {\n isLeading: 0,\n dependsOn: 1,\n isDependedOn: 0,\n hasRedundancy: 0,\n degradationPriority: 0,\n isNonSyncSample: 1\n }\n };\n };\n /*\n * Collates information from a video frame into an object for eventual\n * entry into an MP4 sample table.\n *\n * @param {Object} frame the video frame\n * @param {Number} dataOffset the byte offset to position the sample\n * @return {Object} object containing sample table info for a frame\n */\n\n var sampleForFrame = function (frame, dataOffset) {\n var sample = createDefaultSample();\n sample.dataOffset = dataOffset;\n sample.compositionTimeOffset = frame.pts - frame.dts;\n sample.duration = frame.duration;\n sample.size = 4 * frame.length; // Space for nal unit size\n\n sample.size += frame.byteLength;\n if (frame.keyFrame) {\n sample.flags.dependsOn = 2;\n sample.flags.isNonSyncSample = 0;\n }\n return sample;\n }; // generate the track's sample table from an array of gops\n\n var generateSampleTable$1 = function (gops, baseDataOffset) {\n var h,\n i,\n sample,\n currentGop,\n currentFrame,\n dataOffset = baseDataOffset || 0,\n samples = [];\n for (h = 0; h < gops.length; h++) {\n currentGop = gops[h];\n for (i = 0; i < currentGop.length; i++) {\n currentFrame = currentGop[i];\n sample = sampleForFrame(currentFrame, dataOffset);\n dataOffset += sample.size;\n samples.push(sample);\n }\n }\n return samples;\n }; // generate the track's raw mdat data from an array of gops\n\n var concatenateNalData = function (gops) {\n var h,\n i,\n j,\n currentGop,\n currentFrame,\n currentNal,\n dataOffset = 0,\n nalsByteLength = gops.byteLength,\n numberOfNals = gops.nalCount,\n totalByteLength = nalsByteLength + 4 * numberOfNals,\n data = new Uint8Array(totalByteLength),\n view = new DataView(data.buffer); // For each Gop..\n\n for (h = 0; h < gops.length; h++) {\n currentGop = gops[h]; // For each Frame..\n\n for (i = 0; i < currentGop.length; i++) {\n currentFrame = currentGop[i]; // For each NAL..\n\n for (j = 0; j < currentFrame.length; j++) {\n currentNal = currentFrame[j];\n view.setUint32(dataOffset, currentNal.data.byteLength);\n dataOffset += 4;\n data.set(currentNal.data, dataOffset);\n dataOffset += currentNal.data.byteLength;\n }\n }\n }\n return data;\n }; // generate the track's sample table from a frame\n\n var generateSampleTableForFrame = function (frame, baseDataOffset) {\n var sample,\n dataOffset = baseDataOffset || 0,\n samples = [];\n sample = sampleForFrame(frame, dataOffset);\n samples.push(sample);\n return samples;\n }; // generate the track's raw mdat data from a frame\n\n var concatenateNalDataForFrame = function (frame) {\n var i,\n currentNal,\n dataOffset = 0,\n nalsByteLength = frame.byteLength,\n numberOfNals = frame.length,\n totalByteLength = nalsByteLength + 4 * numberOfNals,\n data = new Uint8Array(totalByteLength),\n view = new DataView(data.buffer); // For each NAL..\n\n for (i = 0; i < frame.length; i++) {\n currentNal = frame[i];\n view.setUint32(dataOffset, currentNal.data.byteLength);\n dataOffset += 4;\n data.set(currentNal.data, dataOffset);\n dataOffset += currentNal.data.byteLength;\n }\n return data;\n };\n var frameUtils$1 = {\n groupNalsIntoFrames: groupNalsIntoFrames,\n groupFramesIntoGops: groupFramesIntoGops,\n extendFirstKeyFrame: extendFirstKeyFrame,\n generateSampleTable: generateSampleTable$1,\n concatenateNalData: concatenateNalData,\n generateSampleTableForFrame: generateSampleTableForFrame,\n concatenateNalDataForFrame: concatenateNalDataForFrame\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var highPrefix = [33, 16, 5, 32, 164, 27];\n var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\n var zeroFill = function (count) {\n var a = [];\n while (count--) {\n a.push(0);\n }\n return a;\n };\n var makeTable = function (metaTable) {\n return Object.keys(metaTable).reduce(function (obj, key) {\n obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {\n return arr.concat(part);\n }, []));\n return obj;\n }, {});\n };\n var silence;\n var silence_1 = function () {\n if (!silence) {\n // Frames-of-silence to use for filling in missing AAC frames\n var coneOfSilence = {\n 96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n 88200: [highPrefix, [231], zeroFill(170), [56]],\n 64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n 48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n 44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n 32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n 24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n 16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n 12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n 11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n 8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n };\n silence = makeTable(coneOfSilence);\n }\n return silence;\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var ONE_SECOND_IN_TS$4 = 90000,\n // 90kHz clock\n secondsToVideoTs,\n secondsToAudioTs,\n videoTsToSeconds,\n audioTsToSeconds,\n audioTsToVideoTs,\n videoTsToAudioTs,\n metadataTsToSeconds;\n secondsToVideoTs = function (seconds) {\n return seconds * ONE_SECOND_IN_TS$4;\n };\n secondsToAudioTs = function (seconds, sampleRate) {\n return seconds * sampleRate;\n };\n videoTsToSeconds = function (timestamp) {\n return timestamp / ONE_SECOND_IN_TS$4;\n };\n audioTsToSeconds = function (timestamp, sampleRate) {\n return timestamp / sampleRate;\n };\n audioTsToVideoTs = function (timestamp, sampleRate) {\n return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n };\n videoTsToAudioTs = function (timestamp, sampleRate) {\n return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n };\n /**\n * Adjust ID3 tag or caption timing information by the timeline pts values\n * (if keepOriginalTimestamps is false) and convert to seconds\n */\n\n metadataTsToSeconds = function (timestamp, timelineStartPts, keepOriginalTimestamps) {\n return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n };\n var clock$2 = {\n ONE_SECOND_IN_TS: ONE_SECOND_IN_TS$4,\n secondsToVideoTs: secondsToVideoTs,\n secondsToAudioTs: secondsToAudioTs,\n videoTsToSeconds: videoTsToSeconds,\n audioTsToSeconds: audioTsToSeconds,\n audioTsToVideoTs: audioTsToVideoTs,\n videoTsToAudioTs: videoTsToAudioTs,\n metadataTsToSeconds: metadataTsToSeconds\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var coneOfSilence = silence_1;\n var clock$1 = clock$2;\n /**\n * Sum the `byteLength` properties of the data in each AAC frame\n */\n\n var sumFrameByteLengths = function (array) {\n var i,\n currentObj,\n sum = 0; // sum the byteLength's all each nal unit in the frame\n\n for (i = 0; i < array.length; i++) {\n currentObj = array[i];\n sum += currentObj.data.byteLength;\n }\n return sum;\n }; // Possibly pad (prefix) the audio track with silence if appending this track\n // would lead to the introduction of a gap in the audio buffer\n\n var prefixWithSilence = function (track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {\n var baseMediaDecodeTimeTs,\n frameDuration = 0,\n audioGapDuration = 0,\n audioFillFrameCount = 0,\n audioFillDuration = 0,\n silentFrame,\n i,\n firstFrame;\n if (!frames.length) {\n return;\n }\n baseMediaDecodeTimeTs = clock$1.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills\n\n frameDuration = Math.ceil(clock$1.ONE_SECOND_IN_TS / (track.samplerate / 1024));\n if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n // insert the shortest possible amount (audio gap or audio to video gap)\n audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap\n\n audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n audioFillDuration = audioFillFrameCount * frameDuration;\n } // don't attempt to fill gaps smaller than a single frame or larger\n // than a half second\n\n if (audioFillFrameCount < 1 || audioFillDuration > clock$1.ONE_SECOND_IN_TS / 2) {\n return;\n }\n silentFrame = coneOfSilence()[track.samplerate];\n if (!silentFrame) {\n // we don't have a silent frame pregenerated for the sample rate, so use a frame\n // from the content instead\n silentFrame = frames[0].data;\n }\n for (i = 0; i < audioFillFrameCount; i++) {\n firstFrame = frames[0];\n frames.splice(0, 0, {\n data: silentFrame,\n dts: firstFrame.dts - frameDuration,\n pts: firstFrame.pts - frameDuration\n });\n }\n track.baseMediaDecodeTime -= Math.floor(clock$1.videoTsToAudioTs(audioFillDuration, track.samplerate));\n return audioFillDuration;\n }; // If the audio segment extends before the earliest allowed dts\n // value, remove AAC frames until starts at or after the earliest\n // allowed DTS so that we don't end up with a negative baseMedia-\n // DecodeTime for the audio track\n\n var trimAdtsFramesByEarliestDts = function (adtsFrames, track, earliestAllowedDts) {\n if (track.minSegmentDts >= earliestAllowedDts) {\n return adtsFrames;\n } // We will need to recalculate the earliest segment Dts\n\n track.minSegmentDts = Infinity;\n return adtsFrames.filter(function (currentFrame) {\n // If this is an allowed frame, keep it and record it's Dts\n if (currentFrame.dts >= earliestAllowedDts) {\n track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n track.minSegmentPts = track.minSegmentDts;\n return true;\n } // Otherwise, discard it\n\n return false;\n });\n }; // generate the track's raw mdat data from an array of frames\n\n var generateSampleTable = function (frames) {\n var i,\n currentFrame,\n samples = [];\n for (i = 0; i < frames.length; i++) {\n currentFrame = frames[i];\n samples.push({\n size: currentFrame.data.byteLength,\n duration: 1024 // For AAC audio, all samples contain 1024 samples\n });\n }\n\n return samples;\n }; // generate the track's sample table from an array of frames\n\n var concatenateFrameData = function (frames) {\n var i,\n currentFrame,\n dataOffset = 0,\n data = new Uint8Array(sumFrameByteLengths(frames));\n for (i = 0; i < frames.length; i++) {\n currentFrame = frames[i];\n data.set(currentFrame.data, dataOffset);\n dataOffset += currentFrame.data.byteLength;\n }\n return data;\n };\n var audioFrameUtils$1 = {\n prefixWithSilence: prefixWithSilence,\n trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,\n generateSampleTable: generateSampleTable,\n concatenateFrameData: concatenateFrameData\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var ONE_SECOND_IN_TS$3 = clock$2.ONE_SECOND_IN_TS;\n /**\n * Store information about the start and end of the track and the\n * duration for each frame/sample we process in order to calculate\n * the baseMediaDecodeTime\n */\n\n var collectDtsInfo = function (track, data) {\n if (typeof data.pts === 'number') {\n if (track.timelineStartInfo.pts === undefined) {\n track.timelineStartInfo.pts = data.pts;\n }\n if (track.minSegmentPts === undefined) {\n track.minSegmentPts = data.pts;\n } else {\n track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n }\n if (track.maxSegmentPts === undefined) {\n track.maxSegmentPts = data.pts;\n } else {\n track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n }\n }\n if (typeof data.dts === 'number') {\n if (track.timelineStartInfo.dts === undefined) {\n track.timelineStartInfo.dts = data.dts;\n }\n if (track.minSegmentDts === undefined) {\n track.minSegmentDts = data.dts;\n } else {\n track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n }\n if (track.maxSegmentDts === undefined) {\n track.maxSegmentDts = data.dts;\n } else {\n track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n }\n }\n };\n /**\n * Clear values used to calculate the baseMediaDecodeTime between\n * tracks\n */\n\n var clearDtsInfo = function (track) {\n delete track.minSegmentDts;\n delete track.maxSegmentDts;\n delete track.minSegmentPts;\n delete track.maxSegmentPts;\n };\n /**\n * Calculate the track's baseMediaDecodeTime based on the earliest\n * DTS the transmuxer has ever seen and the minimum DTS for the\n * current track\n * @param track {object} track metadata configuration\n * @param keepOriginalTimestamps {boolean} If true, keep the timestamps\n * in the source; false to adjust the first segment to start at 0.\n */\n\n var calculateTrackBaseMediaDecodeTime = function (track, keepOriginalTimestamps) {\n var baseMediaDecodeTime,\n scale,\n minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.\n\n if (!keepOriginalTimestamps) {\n minSegmentDts -= track.timelineStartInfo.dts;\n } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n // we want the start of the first segment to be placed\n\n baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first\n\n baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative\n\n baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n if (track.type === 'audio') {\n // Audio has a different clock equal to the sampling_rate so we need to\n // scale the PTS values into the clock rate of the track\n scale = track.samplerate / ONE_SECOND_IN_TS$3;\n baseMediaDecodeTime *= scale;\n baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n }\n return baseMediaDecodeTime;\n };\n var trackDecodeInfo$1 = {\n clearDtsInfo: clearDtsInfo,\n calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,\n collectDtsInfo: collectDtsInfo\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Reads in-band caption information from a video elementary\n * stream. Captions must follow the CEA-708 standard for injection\n * into an MPEG-2 transport streams.\n * @see https://en.wikipedia.org/wiki/CEA-708\n * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n */\n // payload type field to indicate how they are to be\n // interpreted. CEAS-708 caption content is always transmitted with\n // payload type 0x04.\n\n var USER_DATA_REGISTERED_ITU_T_T35 = 4,\n RBSP_TRAILING_BITS = 128;\n /**\n * Parse a supplemental enhancement information (SEI) NAL unit.\n * Stops parsing once a message of type ITU T T35 has been found.\n *\n * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n * @return {object} the parsed SEI payload\n * @see Rec. ITU-T H.264, 7.3.2.3.1\n */\n\n var parseSei = function (bytes) {\n var i = 0,\n result = {\n payloadType: -1,\n payloadSize: 0\n },\n payloadType = 0,\n payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n while (i < bytes.byteLength) {\n // stop once we have hit the end of the sei_rbsp\n if (bytes[i] === RBSP_TRAILING_BITS) {\n break;\n } // Parse payload type\n\n while (bytes[i] === 0xFF) {\n payloadType += 255;\n i++;\n }\n payloadType += bytes[i++]; // Parse payload size\n\n while (bytes[i] === 0xFF) {\n payloadSize += 255;\n i++;\n }\n payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n // there can only ever be one caption message in a frame's sei\n\n if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);\n if (userIdentifier === 'GA94') {\n result.payloadType = payloadType;\n result.payloadSize = payloadSize;\n result.payload = bytes.subarray(i, i + payloadSize);\n break;\n } else {\n result.payload = void 0;\n }\n } // skip the payload and parse the next message\n\n i += payloadSize;\n payloadType = 0;\n payloadSize = 0;\n }\n return result;\n }; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n var parseUserData = function (sei) {\n // itu_t_t35_contry_code must be 181 (United States) for\n // captions\n if (sei.payload[0] !== 181) {\n return null;\n } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n return null;\n } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n return null;\n } // finally, user_data_type_code should be 0x03 for caption data\n\n if (sei.payload[7] !== 0x03) {\n return null;\n } // return the user_data_type_structure and strip the trailing\n // marker bits\n\n return sei.payload.subarray(8, sei.payload.length - 1);\n }; // see CEA-708-D, section 4.4\n\n var parseCaptionPackets = function (pts, userData) {\n var results = [],\n i,\n count,\n offset,\n data; // if this is just filler, return immediately\n\n if (!(userData[0] & 0x40)) {\n return results;\n } // parse out the cc_data_1 and cc_data_2 fields\n\n count = userData[0] & 0x1f;\n for (i = 0; i < count; i++) {\n offset = i * 3;\n data = {\n type: userData[offset + 2] & 0x03,\n pts: pts\n }; // capture cc data when cc_valid is 1\n\n if (userData[offset + 2] & 0x04) {\n data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n results.push(data);\n }\n }\n return results;\n };\n var discardEmulationPreventionBytes$1 = function (data) {\n var length = data.byteLength,\n emulationPreventionBytesPositions = [],\n i = 1,\n newLength,\n newData; // Find all `Emulation Prevention Bytes`\n\n while (i < length - 2) {\n if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n emulationPreventionBytesPositions.push(i + 2);\n i += 2;\n } else {\n i++;\n }\n } // If no Emulation Prevention Bytes were found just return the original\n // array\n\n if (emulationPreventionBytesPositions.length === 0) {\n return data;\n } // Create a new array to hold the NAL unit data\n\n newLength = length - emulationPreventionBytesPositions.length;\n newData = new Uint8Array(newLength);\n var sourceIndex = 0;\n for (i = 0; i < newLength; sourceIndex++, i++) {\n if (sourceIndex === emulationPreventionBytesPositions[0]) {\n // Skip this byte\n sourceIndex++; // Remove this position index\n\n emulationPreventionBytesPositions.shift();\n }\n newData[i] = data[sourceIndex];\n }\n return newData;\n }; // exports\n\n var captionPacketParser = {\n parseSei: parseSei,\n parseUserData: parseUserData,\n parseCaptionPackets: parseCaptionPackets,\n discardEmulationPreventionBytes: discardEmulationPreventionBytes$1,\n USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Reads in-band caption information from a video elementary\n * stream. Captions must follow the CEA-708 standard for injection\n * into an MPEG-2 transport streams.\n * @see https://en.wikipedia.org/wiki/CEA-708\n * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n */\n // Link To Transport\n // -----------------\n\n var Stream$7 = stream;\n var cea708Parser = captionPacketParser;\n var CaptionStream$2 = function (options) {\n options = options || {};\n CaptionStream$2.prototype.init.call(this); // parse708captions flag, default to true\n\n this.parse708captions_ = typeof options.parse708captions === 'boolean' ? options.parse708captions : true;\n this.captionPackets_ = [];\n this.ccStreams_ = [new Cea608Stream(0, 0),\n // eslint-disable-line no-use-before-define\n new Cea608Stream(0, 1),\n // eslint-disable-line no-use-before-define\n new Cea608Stream(1, 0),\n // eslint-disable-line no-use-before-define\n new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n ];\n\n if (this.parse708captions_) {\n this.cc708Stream_ = new Cea708Stream({\n captionServices: options.captionServices\n }); // eslint-disable-line no-use-before-define\n }\n\n this.reset(); // forward data and done events from CCs to this CaptionStream\n\n this.ccStreams_.forEach(function (cc) {\n cc.on('data', this.trigger.bind(this, 'data'));\n cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n cc.on('done', this.trigger.bind(this, 'done'));\n }, this);\n if (this.parse708captions_) {\n this.cc708Stream_.on('data', this.trigger.bind(this, 'data'));\n this.cc708Stream_.on('partialdone', this.trigger.bind(this, 'partialdone'));\n this.cc708Stream_.on('done', this.trigger.bind(this, 'done'));\n }\n };\n CaptionStream$2.prototype = new Stream$7();\n CaptionStream$2.prototype.push = function (event) {\n var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n if (event.nalUnitType !== 'sei_rbsp') {\n return;\n } // parse the sei\n\n sei = cea708Parser.parseSei(event.escapedRBSP); // no payload data, skip\n\n if (!sei.payload) {\n return;\n } // ignore everything but user_data_registered_itu_t_t35\n\n if (sei.payloadType !== cea708Parser.USER_DATA_REGISTERED_ITU_T_T35) {\n return;\n } // parse out the user data payload\n\n userData = cea708Parser.parseUserData(sei); // ignore unrecognized userData\n\n if (!userData) {\n return;\n } // Sometimes, the same segment # will be downloaded twice. To stop the\n // caption data from being processed twice, we track the latest dts we've\n // received and ignore everything with a dts before that. However, since\n // data for a specific dts can be split across packets on either side of\n // a segment boundary, we need to make sure we *don't* ignore the packets\n // from the *next* segment that have dts === this.latestDts_. By constantly\n // tracking the number of packets received with dts === this.latestDts_, we\n // know how many should be ignored once we start receiving duplicates.\n\n if (event.dts < this.latestDts_) {\n // We've started getting older data, so set the flag.\n this.ignoreNextEqualDts_ = true;\n return;\n } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n this.numSameDts_--;\n if (!this.numSameDts_) {\n // We've received the last duplicate packet, time to start processing again\n this.ignoreNextEqualDts_ = false;\n }\n return;\n } // parse out CC data packets and save them for later\n\n newCaptionPackets = cea708Parser.parseCaptionPackets(event.pts, userData);\n this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n if (this.latestDts_ !== event.dts) {\n this.numSameDts_ = 0;\n }\n this.numSameDts_++;\n this.latestDts_ = event.dts;\n };\n CaptionStream$2.prototype.flushCCStreams = function (flushType) {\n this.ccStreams_.forEach(function (cc) {\n return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n }, this);\n };\n CaptionStream$2.prototype.flushStream = function (flushType) {\n // make sure we actually parsed captions before proceeding\n if (!this.captionPackets_.length) {\n this.flushCCStreams(flushType);\n return;\n } // In Chrome, the Array#sort function is not stable so add a\n // presortIndex that we can use to ensure we get a stable-sort\n\n this.captionPackets_.forEach(function (elem, idx) {\n elem.presortIndex = idx;\n }); // sort caption byte-pairs based on their PTS values\n\n this.captionPackets_.sort(function (a, b) {\n if (a.pts === b.pts) {\n return a.presortIndex - b.presortIndex;\n }\n return a.pts - b.pts;\n });\n this.captionPackets_.forEach(function (packet) {\n if (packet.type < 2) {\n // Dispatch packet to the right Cea608Stream\n this.dispatchCea608Packet(packet);\n } else {\n // Dispatch packet to the Cea708Stream\n this.dispatchCea708Packet(packet);\n }\n }, this);\n this.captionPackets_.length = 0;\n this.flushCCStreams(flushType);\n };\n CaptionStream$2.prototype.flush = function () {\n return this.flushStream('flush');\n }; // Only called if handling partial data\n\n CaptionStream$2.prototype.partialFlush = function () {\n return this.flushStream('partialFlush');\n };\n CaptionStream$2.prototype.reset = function () {\n this.latestDts_ = null;\n this.ignoreNextEqualDts_ = false;\n this.numSameDts_ = 0;\n this.activeCea608Channel_ = [null, null];\n this.ccStreams_.forEach(function (ccStream) {\n ccStream.reset();\n });\n }; // From the CEA-608 spec:\n\n /*\n * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n * to switch to captioning or Text.\n */\n // With that in mind, we ignore any data between an XDS control code and a\n // subsequent closed-captioning control code.\n\n CaptionStream$2.prototype.dispatchCea608Packet = function (packet) {\n // NOTE: packet.type is the CEA608 field\n if (this.setsTextOrXDSActive(packet)) {\n this.activeCea608Channel_[packet.type] = null;\n } else if (this.setsChannel1Active(packet)) {\n this.activeCea608Channel_[packet.type] = 0;\n } else if (this.setsChannel2Active(packet)) {\n this.activeCea608Channel_[packet.type] = 1;\n }\n if (this.activeCea608Channel_[packet.type] === null) {\n // If we haven't received anything to set the active channel, or the\n // packets are Text/XDS data, discard the data; we don't want jumbled\n // captions\n return;\n }\n this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n };\n CaptionStream$2.prototype.setsChannel1Active = function (packet) {\n return (packet.ccData & 0x7800) === 0x1000;\n };\n CaptionStream$2.prototype.setsChannel2Active = function (packet) {\n return (packet.ccData & 0x7800) === 0x1800;\n };\n CaptionStream$2.prototype.setsTextOrXDSActive = function (packet) {\n return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n };\n CaptionStream$2.prototype.dispatchCea708Packet = function (packet) {\n if (this.parse708captions_) {\n this.cc708Stream_.push(packet);\n }\n }; // ----------------------\n // Session to Application\n // ----------------------\n // This hash maps special and extended character codes to their\n // proper Unicode equivalent. The first one-byte key is just a\n // non-standard character code. The two-byte keys that follow are\n // the extended CEA708 character codes, along with the preceding\n // 0x10 extended character byte to distinguish these codes from\n // non-extended character codes. Every CEA708 character code that\n // is not in this object maps directly to a standard unicode\n // character code.\n // The transparent space and non-breaking transparent space are\n // technically not fully supported since there is no code to\n // make them transparent, so they have normal non-transparent\n // stand-ins.\n // The special closed caption (CC) character isn't a standard\n // unicode character, so a fairly similar unicode character was\n // chosen in it's place.\n\n var CHARACTER_TRANSLATION_708 = {\n 0x7f: 0x266a,\n // ♪\n 0x1020: 0x20,\n // Transparent Space\n 0x1021: 0xa0,\n // Nob-breaking Transparent Space\n 0x1025: 0x2026,\n // …\n 0x102a: 0x0160,\n // Š\n 0x102c: 0x0152,\n // Œ\n 0x1030: 0x2588,\n // █\n 0x1031: 0x2018,\n // ‘\n 0x1032: 0x2019,\n // ’\n 0x1033: 0x201c,\n // “\n 0x1034: 0x201d,\n // ”\n 0x1035: 0x2022,\n // •\n 0x1039: 0x2122,\n // ™\n 0x103a: 0x0161,\n // š\n 0x103c: 0x0153,\n // œ\n 0x103d: 0x2120,\n // ℠\n 0x103f: 0x0178,\n // Ÿ\n 0x1076: 0x215b,\n // ⅛\n 0x1077: 0x215c,\n // ⅜\n 0x1078: 0x215d,\n // ⅝\n 0x1079: 0x215e,\n // ⅞\n 0x107a: 0x23d0,\n // ⏐\n 0x107b: 0x23a4,\n // ⎤\n 0x107c: 0x23a3,\n // ⎣\n 0x107d: 0x23af,\n // ⎯\n 0x107e: 0x23a6,\n // ⎦\n 0x107f: 0x23a1,\n // ⎡\n 0x10a0: 0x3138 // ㄸ (CC char)\n };\n\n var get708CharFromCode = function (code) {\n var newCode = CHARACTER_TRANSLATION_708[code] || code;\n if (code & 0x1000 && code === newCode) {\n // Invalid extended code\n return '';\n }\n return String.fromCharCode(newCode);\n };\n var within708TextBlock = function (b) {\n return 0x20 <= b && b <= 0x7f || 0xa0 <= b && b <= 0xff;\n };\n var Cea708Window = function (windowNum) {\n this.windowNum = windowNum;\n this.reset();\n };\n Cea708Window.prototype.reset = function () {\n this.clearText();\n this.pendingNewLine = false;\n this.winAttr = {};\n this.penAttr = {};\n this.penLoc = {};\n this.penColor = {}; // These default values are arbitrary,\n // defineWindow will usually override them\n\n this.visible = 0;\n this.rowLock = 0;\n this.columnLock = 0;\n this.priority = 0;\n this.relativePositioning = 0;\n this.anchorVertical = 0;\n this.anchorHorizontal = 0;\n this.anchorPoint = 0;\n this.rowCount = 1;\n this.virtualRowCount = this.rowCount + 1;\n this.columnCount = 41;\n this.windowStyle = 0;\n this.penStyle = 0;\n };\n Cea708Window.prototype.getText = function () {\n return this.rows.join('\\n');\n };\n Cea708Window.prototype.clearText = function () {\n this.rows = [''];\n this.rowIdx = 0;\n };\n Cea708Window.prototype.newLine = function (pts) {\n if (this.rows.length >= this.virtualRowCount && typeof this.beforeRowOverflow === 'function') {\n this.beforeRowOverflow(pts);\n }\n if (this.rows.length > 0) {\n this.rows.push('');\n this.rowIdx++;\n } // Show all virtual rows since there's no visible scrolling\n\n while (this.rows.length > this.virtualRowCount) {\n this.rows.shift();\n this.rowIdx--;\n }\n };\n Cea708Window.prototype.isEmpty = function () {\n if (this.rows.length === 0) {\n return true;\n } else if (this.rows.length === 1) {\n return this.rows[0] === '';\n }\n return false;\n };\n Cea708Window.prototype.addText = function (text) {\n this.rows[this.rowIdx] += text;\n };\n Cea708Window.prototype.backspace = function () {\n if (!this.isEmpty()) {\n var row = this.rows[this.rowIdx];\n this.rows[this.rowIdx] = row.substr(0, row.length - 1);\n }\n };\n var Cea708Service = function (serviceNum, encoding, stream) {\n this.serviceNum = serviceNum;\n this.text = '';\n this.currentWindow = new Cea708Window(-1);\n this.windows = [];\n this.stream = stream; // Try to setup a TextDecoder if an `encoding` value was provided\n\n if (typeof encoding === 'string') {\n this.createTextDecoder(encoding);\n }\n };\n /**\n * Initialize service windows\n * Must be run before service use\n *\n * @param {Integer} pts PTS value\n * @param {Function} beforeRowOverflow Function to execute before row overflow of a window\n */\n\n Cea708Service.prototype.init = function (pts, beforeRowOverflow) {\n this.startPts = pts;\n for (var win = 0; win < 8; win++) {\n this.windows[win] = new Cea708Window(win);\n if (typeof beforeRowOverflow === 'function') {\n this.windows[win].beforeRowOverflow = beforeRowOverflow;\n }\n }\n };\n /**\n * Set current window of service to be affected by commands\n *\n * @param {Integer} windowNum Window number\n */\n\n Cea708Service.prototype.setCurrentWindow = function (windowNum) {\n this.currentWindow = this.windows[windowNum];\n };\n /**\n * Try to create a TextDecoder if it is natively supported\n */\n\n Cea708Service.prototype.createTextDecoder = function (encoding) {\n if (typeof TextDecoder === 'undefined') {\n this.stream.trigger('log', {\n level: 'warn',\n message: 'The `encoding` option is unsupported without TextDecoder support'\n });\n } else {\n try {\n this.textDecoder_ = new TextDecoder(encoding);\n } catch (error) {\n this.stream.trigger('log', {\n level: 'warn',\n message: 'TextDecoder could not be created with ' + encoding + ' encoding. ' + error\n });\n }\n }\n };\n var Cea708Stream = function (options) {\n options = options || {};\n Cea708Stream.prototype.init.call(this);\n var self = this;\n var captionServices = options.captionServices || {};\n var captionServiceEncodings = {};\n var serviceProps; // Get service encodings from captionServices option block\n\n Object.keys(captionServices).forEach(serviceName => {\n serviceProps = captionServices[serviceName];\n if (/^SERVICE/.test(serviceName)) {\n captionServiceEncodings[serviceName] = serviceProps.encoding;\n }\n });\n this.serviceEncodings = captionServiceEncodings;\n this.current708Packet = null;\n this.services = {};\n this.push = function (packet) {\n if (packet.type === 3) {\n // 708 packet start\n self.new708Packet();\n self.add708Bytes(packet);\n } else {\n if (self.current708Packet === null) {\n // This should only happen at the start of a file if there's no packet start.\n self.new708Packet();\n }\n self.add708Bytes(packet);\n }\n };\n };\n Cea708Stream.prototype = new Stream$7();\n /**\n * Push current 708 packet, create new 708 packet.\n */\n\n Cea708Stream.prototype.new708Packet = function () {\n if (this.current708Packet !== null) {\n this.push708Packet();\n }\n this.current708Packet = {\n data: [],\n ptsVals: []\n };\n };\n /**\n * Add pts and both bytes from packet into current 708 packet.\n */\n\n Cea708Stream.prototype.add708Bytes = function (packet) {\n var data = packet.ccData;\n var byte0 = data >>> 8;\n var byte1 = data & 0xff; // I would just keep a list of packets instead of bytes, but it isn't clear in the spec\n // that service blocks will always line up with byte pairs.\n\n this.current708Packet.ptsVals.push(packet.pts);\n this.current708Packet.data.push(byte0);\n this.current708Packet.data.push(byte1);\n };\n /**\n * Parse completed 708 packet into service blocks and push each service block.\n */\n\n Cea708Stream.prototype.push708Packet = function () {\n var packet708 = this.current708Packet;\n var packetData = packet708.data;\n var serviceNum = null;\n var blockSize = null;\n var i = 0;\n var b = packetData[i++];\n packet708.seq = b >> 6;\n packet708.sizeCode = b & 0x3f; // 0b00111111;\n\n for (; i < packetData.length; i++) {\n b = packetData[i++];\n serviceNum = b >> 5;\n blockSize = b & 0x1f; // 0b00011111\n\n if (serviceNum === 7 && blockSize > 0) {\n // Extended service num\n b = packetData[i++];\n serviceNum = b;\n }\n this.pushServiceBlock(serviceNum, i, blockSize);\n if (blockSize > 0) {\n i += blockSize - 1;\n }\n }\n };\n /**\n * Parse service block, execute commands, read text.\n *\n * Note: While many of these commands serve important purposes,\n * many others just parse out the parameters or attributes, but\n * nothing is done with them because this is not a full and complete\n * implementation of the entire 708 spec.\n *\n * @param {Integer} serviceNum Service number\n * @param {Integer} start Start index of the 708 packet data\n * @param {Integer} size Block size\n */\n\n Cea708Stream.prototype.pushServiceBlock = function (serviceNum, start, size) {\n var b;\n var i = start;\n var packetData = this.current708Packet.data;\n var service = this.services[serviceNum];\n if (!service) {\n service = this.initService(serviceNum, i);\n }\n for (; i < start + size && i < packetData.length; i++) {\n b = packetData[i];\n if (within708TextBlock(b)) {\n i = this.handleText(i, service);\n } else if (b === 0x18) {\n i = this.multiByteCharacter(i, service);\n } else if (b === 0x10) {\n i = this.extendedCommands(i, service);\n } else if (0x80 <= b && b <= 0x87) {\n i = this.setCurrentWindow(i, service);\n } else if (0x98 <= b && b <= 0x9f) {\n i = this.defineWindow(i, service);\n } else if (b === 0x88) {\n i = this.clearWindows(i, service);\n } else if (b === 0x8c) {\n i = this.deleteWindows(i, service);\n } else if (b === 0x89) {\n i = this.displayWindows(i, service);\n } else if (b === 0x8a) {\n i = this.hideWindows(i, service);\n } else if (b === 0x8b) {\n i = this.toggleWindows(i, service);\n } else if (b === 0x97) {\n i = this.setWindowAttributes(i, service);\n } else if (b === 0x90) {\n i = this.setPenAttributes(i, service);\n } else if (b === 0x91) {\n i = this.setPenColor(i, service);\n } else if (b === 0x92) {\n i = this.setPenLocation(i, service);\n } else if (b === 0x8f) {\n service = this.reset(i, service);\n } else if (b === 0x08) {\n // BS: Backspace\n service.currentWindow.backspace();\n } else if (b === 0x0c) {\n // FF: Form feed\n service.currentWindow.clearText();\n } else if (b === 0x0d) {\n // CR: Carriage return\n service.currentWindow.pendingNewLine = true;\n } else if (b === 0x0e) {\n // HCR: Horizontal carriage return\n service.currentWindow.clearText();\n } else if (b === 0x8d) {\n // DLY: Delay, nothing to do\n i++;\n } else ;\n }\n };\n /**\n * Execute an extended command\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.extendedCommands = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[++i];\n if (within708TextBlock(b)) {\n i = this.handleText(i, service, {\n isExtended: true\n });\n }\n return i;\n };\n /**\n * Get PTS value of a given byte index\n *\n * @param {Integer} byteIndex Index of the byte\n * @return {Integer} PTS\n */\n\n Cea708Stream.prototype.getPts = function (byteIndex) {\n // There's 1 pts value per 2 bytes\n return this.current708Packet.ptsVals[Math.floor(byteIndex / 2)];\n };\n /**\n * Initializes a service\n *\n * @param {Integer} serviceNum Service number\n * @return {Service} Initialized service object\n */\n\n Cea708Stream.prototype.initService = function (serviceNum, i) {\n var serviceName = 'SERVICE' + serviceNum;\n var self = this;\n var serviceName;\n var encoding;\n if (serviceName in this.serviceEncodings) {\n encoding = this.serviceEncodings[serviceName];\n }\n this.services[serviceNum] = new Cea708Service(serviceNum, encoding, self);\n this.services[serviceNum].init(this.getPts(i), function (pts) {\n self.flushDisplayed(pts, self.services[serviceNum]);\n });\n return this.services[serviceNum];\n };\n /**\n * Execute text writing to current window\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.handleText = function (i, service, options) {\n var isExtended = options && options.isExtended;\n var isMultiByte = options && options.isMultiByte;\n var packetData = this.current708Packet.data;\n var extended = isExtended ? 0x1000 : 0x0000;\n var currentByte = packetData[i];\n var nextByte = packetData[i + 1];\n var win = service.currentWindow;\n var char;\n var charCodeArray; // Use the TextDecoder if one was created for this service\n\n if (service.textDecoder_ && !isExtended) {\n if (isMultiByte) {\n charCodeArray = [currentByte, nextByte];\n i++;\n } else {\n charCodeArray = [currentByte];\n }\n char = service.textDecoder_.decode(new Uint8Array(charCodeArray));\n } else {\n char = get708CharFromCode(extended | currentByte);\n }\n if (win.pendingNewLine && !win.isEmpty()) {\n win.newLine(this.getPts(i));\n }\n win.pendingNewLine = false;\n win.addText(char);\n return i;\n };\n /**\n * Handle decoding of multibyte character\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.multiByteCharacter = function (i, service) {\n var packetData = this.current708Packet.data;\n var firstByte = packetData[i + 1];\n var secondByte = packetData[i + 2];\n if (within708TextBlock(firstByte) && within708TextBlock(secondByte)) {\n i = this.handleText(++i, service, {\n isMultiByte: true\n });\n }\n return i;\n };\n /**\n * Parse and execute the CW# command.\n *\n * Set the current window.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.setCurrentWindow = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[i];\n var windowNum = b & 0x07;\n service.setCurrentWindow(windowNum);\n return i;\n };\n /**\n * Parse and execute the DF# command.\n *\n * Define a window and set it as the current window.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.defineWindow = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[i];\n var windowNum = b & 0x07;\n service.setCurrentWindow(windowNum);\n var win = service.currentWindow;\n b = packetData[++i];\n win.visible = (b & 0x20) >> 5; // v\n\n win.rowLock = (b & 0x10) >> 4; // rl\n\n win.columnLock = (b & 0x08) >> 3; // cl\n\n win.priority = b & 0x07; // p\n\n b = packetData[++i];\n win.relativePositioning = (b & 0x80) >> 7; // rp\n\n win.anchorVertical = b & 0x7f; // av\n\n b = packetData[++i];\n win.anchorHorizontal = b; // ah\n\n b = packetData[++i];\n win.anchorPoint = (b & 0xf0) >> 4; // ap\n\n win.rowCount = b & 0x0f; // rc\n\n b = packetData[++i];\n win.columnCount = b & 0x3f; // cc\n\n b = packetData[++i];\n win.windowStyle = (b & 0x38) >> 3; // ws\n\n win.penStyle = b & 0x07; // ps\n // The spec says there are (rowCount+1) \"virtual rows\"\n\n win.virtualRowCount = win.rowCount + 1;\n return i;\n };\n /**\n * Parse and execute the SWA command.\n *\n * Set attributes of the current window.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.setWindowAttributes = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[i];\n var winAttr = service.currentWindow.winAttr;\n b = packetData[++i];\n winAttr.fillOpacity = (b & 0xc0) >> 6; // fo\n\n winAttr.fillRed = (b & 0x30) >> 4; // fr\n\n winAttr.fillGreen = (b & 0x0c) >> 2; // fg\n\n winAttr.fillBlue = b & 0x03; // fb\n\n b = packetData[++i];\n winAttr.borderType = (b & 0xc0) >> 6; // bt\n\n winAttr.borderRed = (b & 0x30) >> 4; // br\n\n winAttr.borderGreen = (b & 0x0c) >> 2; // bg\n\n winAttr.borderBlue = b & 0x03; // bb\n\n b = packetData[++i];\n winAttr.borderType += (b & 0x80) >> 5; // bt\n\n winAttr.wordWrap = (b & 0x40) >> 6; // ww\n\n winAttr.printDirection = (b & 0x30) >> 4; // pd\n\n winAttr.scrollDirection = (b & 0x0c) >> 2; // sd\n\n winAttr.justify = b & 0x03; // j\n\n b = packetData[++i];\n winAttr.effectSpeed = (b & 0xf0) >> 4; // es\n\n winAttr.effectDirection = (b & 0x0c) >> 2; // ed\n\n winAttr.displayEffect = b & 0x03; // de\n\n return i;\n };\n /**\n * Gather text from all displayed windows and push a caption to output.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n */\n\n Cea708Stream.prototype.flushDisplayed = function (pts, service) {\n var displayedText = []; // TODO: Positioning not supported, displaying multiple windows will not necessarily\n // display text in the correct order, but sample files so far have not shown any issue.\n\n for (var winId = 0; winId < 8; winId++) {\n if (service.windows[winId].visible && !service.windows[winId].isEmpty()) {\n displayedText.push(service.windows[winId].getText());\n }\n }\n service.endPts = pts;\n service.text = displayedText.join('\\n\\n');\n this.pushCaption(service);\n service.startPts = pts;\n };\n /**\n * Push a caption to output if the caption contains text.\n *\n * @param {Service} service The service object to be affected\n */\n\n Cea708Stream.prototype.pushCaption = function (service) {\n if (service.text !== '') {\n this.trigger('data', {\n startPts: service.startPts,\n endPts: service.endPts,\n text: service.text,\n stream: 'cc708_' + service.serviceNum\n });\n service.text = '';\n service.startPts = service.endPts;\n }\n };\n /**\n * Parse and execute the DSW command.\n *\n * Set visible property of windows based on the parsed bitmask.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.displayWindows = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[++i];\n var pts = this.getPts(i);\n this.flushDisplayed(pts, service);\n for (var winId = 0; winId < 8; winId++) {\n if (b & 0x01 << winId) {\n service.windows[winId].visible = 1;\n }\n }\n return i;\n };\n /**\n * Parse and execute the HDW command.\n *\n * Set visible property of windows based on the parsed bitmask.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.hideWindows = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[++i];\n var pts = this.getPts(i);\n this.flushDisplayed(pts, service);\n for (var winId = 0; winId < 8; winId++) {\n if (b & 0x01 << winId) {\n service.windows[winId].visible = 0;\n }\n }\n return i;\n };\n /**\n * Parse and execute the TGW command.\n *\n * Set visible property of windows based on the parsed bitmask.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.toggleWindows = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[++i];\n var pts = this.getPts(i);\n this.flushDisplayed(pts, service);\n for (var winId = 0; winId < 8; winId++) {\n if (b & 0x01 << winId) {\n service.windows[winId].visible ^= 1;\n }\n }\n return i;\n };\n /**\n * Parse and execute the CLW command.\n *\n * Clear text of windows based on the parsed bitmask.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.clearWindows = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[++i];\n var pts = this.getPts(i);\n this.flushDisplayed(pts, service);\n for (var winId = 0; winId < 8; winId++) {\n if (b & 0x01 << winId) {\n service.windows[winId].clearText();\n }\n }\n return i;\n };\n /**\n * Parse and execute the DLW command.\n *\n * Re-initialize windows based on the parsed bitmask.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.deleteWindows = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[++i];\n var pts = this.getPts(i);\n this.flushDisplayed(pts, service);\n for (var winId = 0; winId < 8; winId++) {\n if (b & 0x01 << winId) {\n service.windows[winId].reset();\n }\n }\n return i;\n };\n /**\n * Parse and execute the SPA command.\n *\n * Set pen attributes of the current window.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.setPenAttributes = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[i];\n var penAttr = service.currentWindow.penAttr;\n b = packetData[++i];\n penAttr.textTag = (b & 0xf0) >> 4; // tt\n\n penAttr.offset = (b & 0x0c) >> 2; // o\n\n penAttr.penSize = b & 0x03; // s\n\n b = packetData[++i];\n penAttr.italics = (b & 0x80) >> 7; // i\n\n penAttr.underline = (b & 0x40) >> 6; // u\n\n penAttr.edgeType = (b & 0x38) >> 3; // et\n\n penAttr.fontStyle = b & 0x07; // fs\n\n return i;\n };\n /**\n * Parse and execute the SPC command.\n *\n * Set pen color of the current window.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.setPenColor = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[i];\n var penColor = service.currentWindow.penColor;\n b = packetData[++i];\n penColor.fgOpacity = (b & 0xc0) >> 6; // fo\n\n penColor.fgRed = (b & 0x30) >> 4; // fr\n\n penColor.fgGreen = (b & 0x0c) >> 2; // fg\n\n penColor.fgBlue = b & 0x03; // fb\n\n b = packetData[++i];\n penColor.bgOpacity = (b & 0xc0) >> 6; // bo\n\n penColor.bgRed = (b & 0x30) >> 4; // br\n\n penColor.bgGreen = (b & 0x0c) >> 2; // bg\n\n penColor.bgBlue = b & 0x03; // bb\n\n b = packetData[++i];\n penColor.edgeRed = (b & 0x30) >> 4; // er\n\n penColor.edgeGreen = (b & 0x0c) >> 2; // eg\n\n penColor.edgeBlue = b & 0x03; // eb\n\n return i;\n };\n /**\n * Parse and execute the SPL command.\n *\n * Set pen location of the current window.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Integer} New index after parsing\n */\n\n Cea708Stream.prototype.setPenLocation = function (i, service) {\n var packetData = this.current708Packet.data;\n var b = packetData[i];\n var penLoc = service.currentWindow.penLoc; // Positioning isn't really supported at the moment, so this essentially just inserts a linebreak\n\n service.currentWindow.pendingNewLine = true;\n b = packetData[++i];\n penLoc.row = b & 0x0f; // r\n\n b = packetData[++i];\n penLoc.column = b & 0x3f; // c\n\n return i;\n };\n /**\n * Execute the RST command.\n *\n * Reset service to a clean slate. Re-initialize.\n *\n * @param {Integer} i Current index in the 708 packet\n * @param {Service} service The service object to be affected\n * @return {Service} Re-initialized service\n */\n\n Cea708Stream.prototype.reset = function (i, service) {\n var pts = this.getPts(i);\n this.flushDisplayed(pts, service);\n return this.initService(service.serviceNum, i);\n }; // This hash maps non-ASCII, special, and extended character codes to their\n // proper Unicode equivalent. The first keys that are only a single byte\n // are the non-standard ASCII characters, which simply map the CEA608 byte\n // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n // character codes, but have their MSB bitmasked with 0x03 so that a lookup\n // can be performed regardless of the field and data channel on which the\n // character code was received.\n\n var CHARACTER_TRANSLATION = {\n 0x2a: 0xe1,\n // á\n 0x5c: 0xe9,\n // é\n 0x5e: 0xed,\n // í\n 0x5f: 0xf3,\n // ó\n 0x60: 0xfa,\n // ú\n 0x7b: 0xe7,\n // ç\n 0x7c: 0xf7,\n // ÷\n 0x7d: 0xd1,\n // Ñ\n 0x7e: 0xf1,\n // ñ\n 0x7f: 0x2588,\n // █\n 0x0130: 0xae,\n // ®\n 0x0131: 0xb0,\n // °\n 0x0132: 0xbd,\n // ½\n 0x0133: 0xbf,\n // ¿\n 0x0134: 0x2122,\n // ™\n 0x0135: 0xa2,\n // ¢\n 0x0136: 0xa3,\n // £\n 0x0137: 0x266a,\n // ♪\n 0x0138: 0xe0,\n // à\n 0x0139: 0xa0,\n //\n 0x013a: 0xe8,\n // è\n 0x013b: 0xe2,\n // â\n 0x013c: 0xea,\n // ê\n 0x013d: 0xee,\n // î\n 0x013e: 0xf4,\n // ô\n 0x013f: 0xfb,\n // û\n 0x0220: 0xc1,\n // Á\n 0x0221: 0xc9,\n // É\n 0x0222: 0xd3,\n // Ó\n 0x0223: 0xda,\n // Ú\n 0x0224: 0xdc,\n // Ü\n 0x0225: 0xfc,\n // ü\n 0x0226: 0x2018,\n // ‘\n 0x0227: 0xa1,\n // ¡\n 0x0228: 0x2a,\n // *\n 0x0229: 0x27,\n // '\n 0x022a: 0x2014,\n // —\n 0x022b: 0xa9,\n // ©\n 0x022c: 0x2120,\n // ℠\n 0x022d: 0x2022,\n // •\n 0x022e: 0x201c,\n // “\n 0x022f: 0x201d,\n // ”\n 0x0230: 0xc0,\n // À\n 0x0231: 0xc2,\n // Â\n 0x0232: 0xc7,\n // Ç\n 0x0233: 0xc8,\n // È\n 0x0234: 0xca,\n // Ê\n 0x0235: 0xcb,\n // Ë\n 0x0236: 0xeb,\n // ë\n 0x0237: 0xce,\n // Î\n 0x0238: 0xcf,\n // Ï\n 0x0239: 0xef,\n // ï\n 0x023a: 0xd4,\n // Ô\n 0x023b: 0xd9,\n // Ù\n 0x023c: 0xf9,\n // ù\n 0x023d: 0xdb,\n // Û\n 0x023e: 0xab,\n // «\n 0x023f: 0xbb,\n // »\n 0x0320: 0xc3,\n // Ã\n 0x0321: 0xe3,\n // ã\n 0x0322: 0xcd,\n // Í\n 0x0323: 0xcc,\n // Ì\n 0x0324: 0xec,\n // ì\n 0x0325: 0xd2,\n // Ò\n 0x0326: 0xf2,\n // ò\n 0x0327: 0xd5,\n // Õ\n 0x0328: 0xf5,\n // õ\n 0x0329: 0x7b,\n // {\n 0x032a: 0x7d,\n // }\n 0x032b: 0x5c,\n // \\\n 0x032c: 0x5e,\n // ^\n 0x032d: 0x5f,\n // _\n 0x032e: 0x7c,\n // |\n 0x032f: 0x7e,\n // ~\n 0x0330: 0xc4,\n // Ä\n 0x0331: 0xe4,\n // ä\n 0x0332: 0xd6,\n // Ö\n 0x0333: 0xf6,\n // ö\n 0x0334: 0xdf,\n // ß\n 0x0335: 0xa5,\n // ¥\n 0x0336: 0xa4,\n // ¤\n 0x0337: 0x2502,\n // │\n 0x0338: 0xc5,\n // Å\n 0x0339: 0xe5,\n // å\n 0x033a: 0xd8,\n // Ø\n 0x033b: 0xf8,\n // ø\n 0x033c: 0x250c,\n // ┌\n 0x033d: 0x2510,\n // ┐\n 0x033e: 0x2514,\n // └\n 0x033f: 0x2518 // ┘\n };\n\n var getCharFromCode = function (code) {\n if (code === null) {\n return '';\n }\n code = CHARACTER_TRANSLATION[code] || code;\n return String.fromCharCode(code);\n }; // the index of the last row in a CEA-608 display buffer\n\n var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n // getting it through bit logic.\n\n var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n // cells. The \"bottom\" row is the last element in the outer array.\n\n var createDisplayBuffer = function () {\n var result = [],\n i = BOTTOM_ROW + 1;\n while (i--) {\n result.push('');\n }\n return result;\n };\n var Cea608Stream = function (field, dataChannel) {\n Cea608Stream.prototype.init.call(this);\n this.field_ = field || 0;\n this.dataChannel_ = dataChannel || 0;\n this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n this.setConstants();\n this.reset();\n this.push = function (packet) {\n var data, swap, char0, char1, text; // remove the parity bits\n\n data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n if (data === this.lastControlCode_) {\n this.lastControlCode_ = null;\n return;\n } // Store control codes\n\n if ((data & 0xf000) === 0x1000) {\n this.lastControlCode_ = data;\n } else if (data !== this.PADDING_) {\n this.lastControlCode_ = null;\n }\n char0 = data >>> 8;\n char1 = data & 0xff;\n if (data === this.PADDING_) {\n return;\n } else if (data === this.RESUME_CAPTION_LOADING_) {\n this.mode_ = 'popOn';\n } else if (data === this.END_OF_CAPTION_) {\n // If an EOC is received while in paint-on mode, the displayed caption\n // text should be swapped to non-displayed memory as if it was a pop-on\n // caption. Because of that, we should explicitly switch back to pop-on\n // mode\n this.mode_ = 'popOn';\n this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n this.flushDisplayed(packet.pts); // flip memory\n\n swap = this.displayed_;\n this.displayed_ = this.nonDisplayed_;\n this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n this.startPts_ = packet.pts;\n } else if (data === this.ROLL_UP_2_ROWS_) {\n this.rollUpRows_ = 2;\n this.setRollUp(packet.pts);\n } else if (data === this.ROLL_UP_3_ROWS_) {\n this.rollUpRows_ = 3;\n this.setRollUp(packet.pts);\n } else if (data === this.ROLL_UP_4_ROWS_) {\n this.rollUpRows_ = 4;\n this.setRollUp(packet.pts);\n } else if (data === this.CARRIAGE_RETURN_) {\n this.clearFormatting(packet.pts);\n this.flushDisplayed(packet.pts);\n this.shiftRowsUp_();\n this.startPts_ = packet.pts;\n } else if (data === this.BACKSPACE_) {\n if (this.mode_ === 'popOn') {\n this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n } else {\n this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n }\n } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n this.flushDisplayed(packet.pts);\n this.displayed_ = createDisplayBuffer();\n } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n this.nonDisplayed_ = createDisplayBuffer();\n } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n if (this.mode_ !== 'paintOn') {\n // NOTE: This should be removed when proper caption positioning is\n // implemented\n this.flushDisplayed(packet.pts);\n this.displayed_ = createDisplayBuffer();\n }\n this.mode_ = 'paintOn';\n this.startPts_ = packet.pts; // Append special characters to caption text\n } else if (this.isSpecialCharacter(char0, char1)) {\n // Bitmask char0 so that we can apply character transformations\n // regardless of field and data channel.\n // Then byte-shift to the left and OR with char1 so we can pass the\n // entire character code to `getCharFromCode`.\n char0 = (char0 & 0x03) << 8;\n text = getCharFromCode(char0 | char1);\n this[this.mode_](packet.pts, text);\n this.column_++; // Append extended characters to caption text\n } else if (this.isExtCharacter(char0, char1)) {\n // Extended characters always follow their \"non-extended\" equivalents.\n // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n // decoders are supposed to drop the \"è\", while compliant decoders\n // backspace the \"e\" and insert \"è\".\n // Delete the previous character\n if (this.mode_ === 'popOn') {\n this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n } else {\n this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n } // Bitmask char0 so that we can apply character transformations\n // regardless of field and data channel.\n // Then byte-shift to the left and OR with char1 so we can pass the\n // entire character code to `getCharFromCode`.\n\n char0 = (char0 & 0x03) << 8;\n text = getCharFromCode(char0 | char1);\n this[this.mode_](packet.pts, text);\n this.column_++; // Process mid-row codes\n } else if (this.isMidRowCode(char0, char1)) {\n // Attributes are not additive, so clear all formatting\n this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n // should be replaced with spaces, so add one now\n\n this[this.mode_](packet.pts, ' ');\n this.column_++;\n if ((char1 & 0xe) === 0xe) {\n this.addFormatting(packet.pts, ['i']);\n }\n if ((char1 & 0x1) === 0x1) {\n this.addFormatting(packet.pts, ['u']);\n } // Detect offset control codes and adjust cursor\n } else if (this.isOffsetControlCode(char0, char1)) {\n // Cursor position is set by indent PAC (see below) in 4-column\n // increments, with an additional offset code of 1-3 to reach any\n // of the 32 columns specified by CEA-608. So all we need to do\n // here is increment the column cursor by the given offset.\n this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n } else if (this.isPAC(char0, char1)) {\n // There's no logic for PAC -> row mapping, so we have to just\n // find the row code in an array and use its index :(\n var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n if (this.mode_ === 'rollUp') {\n // This implies that the base row is incorrectly set.\n // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n // of roll-up rows set.\n if (row - this.rollUpRows_ + 1 < 0) {\n row = this.rollUpRows_ - 1;\n }\n this.setRollUp(packet.pts, row);\n }\n if (row !== this.row_) {\n // formatting is only persistent for current row\n this.clearFormatting(packet.pts);\n this.row_ = row;\n } // All PACs can apply underline, so detect and apply\n // (All odd-numbered second bytes set underline)\n\n if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n this.addFormatting(packet.pts, ['u']);\n }\n if ((data & 0x10) === 0x10) {\n // We've got an indent level code. Each successive even number\n // increments the column cursor by 4, so we can get the desired\n // column position by bit-shifting to the right (to get n/2)\n // and multiplying by 4.\n this.column_ = ((data & 0xe) >> 1) * 4;\n }\n if (this.isColorPAC(char1)) {\n // it's a color code, though we only support white, which\n // can be either normal or italicized. white italics can be\n // either 0x4e or 0x6e depending on the row, so we just\n // bitwise-and with 0xe to see if italics should be turned on\n if ((char1 & 0xe) === 0xe) {\n this.addFormatting(packet.pts, ['i']);\n }\n } // We have a normal character in char0, and possibly one in char1\n } else if (this.isNormalChar(char0)) {\n if (char1 === 0x00) {\n char1 = null;\n }\n text = getCharFromCode(char0);\n text += getCharFromCode(char1);\n this[this.mode_](packet.pts, text);\n this.column_ += text.length;\n } // finish data processing\n };\n };\n\n Cea608Stream.prototype = new Stream$7(); // Trigger a cue point that captures the current state of the\n // display buffer\n\n Cea608Stream.prototype.flushDisplayed = function (pts) {\n var content = this.displayed_ // remove spaces from the start and end of the string\n .map(function (row, index) {\n try {\n return row.trim();\n } catch (e) {\n // Ordinarily, this shouldn't happen. However, caption\n // parsing errors should not throw exceptions and\n // break playback.\n this.trigger('log', {\n level: 'warn',\n message: 'Skipping a malformed 608 caption at index ' + index + '.'\n });\n return '';\n }\n }, this) // combine all text rows to display in one cue\n .join('\\n') // and remove blank rows from the start and end, but not the middle\n .replace(/^\\n+|\\n+$/g, '');\n if (content.length) {\n this.trigger('data', {\n startPts: this.startPts_,\n endPts: pts,\n text: content,\n stream: this.name_\n });\n }\n };\n /**\n * Zero out the data, used for startup and on seek\n */\n\n Cea608Stream.prototype.reset = function () {\n this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n // actually display captions. If a caption is shifted to a row\n // with a lower index than this, it is cleared from the display\n // buffer\n\n this.topRow_ = 0;\n this.startPts_ = 0;\n this.displayed_ = createDisplayBuffer();\n this.nonDisplayed_ = createDisplayBuffer();\n this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n this.column_ = 0;\n this.row_ = BOTTOM_ROW;\n this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n this.formatting_ = [];\n };\n /**\n * Sets up control code and related constants for this instance\n */\n\n Cea608Stream.prototype.setConstants = function () {\n // The following attributes have these uses:\n // ext_ : char0 for mid-row codes, and the base for extended\n // chars (ext_+0, ext_+1, and ext_+2 are char0s for\n // extended codes)\n // control_: char0 for control codes, except byte-shifted to the\n // left so that we can do this.control_ | CONTROL_CODE\n // offset_: char0 for tab offset codes\n //\n // It's also worth noting that control codes, and _only_ control codes,\n // differ between field 1 and field2. Field 2 control codes are always\n // their field 1 value plus 1. That's why there's the \"| field\" on the\n // control value.\n if (this.dataChannel_ === 0) {\n this.BASE_ = 0x10;\n this.EXT_ = 0x11;\n this.CONTROL_ = (0x14 | this.field_) << 8;\n this.OFFSET_ = 0x17;\n } else if (this.dataChannel_ === 1) {\n this.BASE_ = 0x18;\n this.EXT_ = 0x19;\n this.CONTROL_ = (0x1c | this.field_) << 8;\n this.OFFSET_ = 0x1f;\n } // Constants for the LSByte command codes recognized by Cea608Stream. This\n // list is not exhaustive. For a more comprehensive listing and semantics see\n // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n // Padding\n\n this.PADDING_ = 0x0000; // Pop-on Mode\n\n this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n this.BACKSPACE_ = this.CONTROL_ | 0x21;\n this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n };\n /**\n * Detects if the 2-byte packet data is a special character\n *\n * Special characters have a second byte in the range 0x30 to 0x3f,\n * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n * data channel 2).\n *\n * @param {Integer} char0 The first byte\n * @param {Integer} char1 The second byte\n * @return {Boolean} Whether the 2 bytes are an special character\n */\n\n Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n };\n /**\n * Detects if the 2-byte packet data is an extended character\n *\n * Extended characters have a second byte in the range 0x20 to 0x3f,\n * with the first byte being 0x12 or 0x13 (for data channel 1) or\n * 0x1a or 0x1b (for data channel 2).\n *\n * @param {Integer} char0 The first byte\n * @param {Integer} char1 The second byte\n * @return {Boolean} Whether the 2 bytes are an extended character\n */\n\n Cea608Stream.prototype.isExtCharacter = function (char0, char1) {\n return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n };\n /**\n * Detects if the 2-byte packet is a mid-row code\n *\n * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n * channel 2).\n *\n * @param {Integer} char0 The first byte\n * @param {Integer} char1 The second byte\n * @return {Boolean} Whether the 2 bytes are a mid-row code\n */\n\n Cea608Stream.prototype.isMidRowCode = function (char0, char1) {\n return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n };\n /**\n * Detects if the 2-byte packet is an offset control code\n *\n * Offset control codes have a second byte in the range 0x21 to 0x23,\n * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n * data channel 2).\n *\n * @param {Integer} char0 The first byte\n * @param {Integer} char1 The second byte\n * @return {Boolean} Whether the 2 bytes are an offset control code\n */\n\n Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n };\n /**\n * Detects if the 2-byte packet is a Preamble Address Code\n *\n * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n * range 0x40 to 0x7f.\n *\n * @param {Integer} char0 The first byte\n * @param {Integer} char1 The second byte\n * @return {Boolean} Whether the 2 bytes are a PAC\n */\n\n Cea608Stream.prototype.isPAC = function (char0, char1) {\n return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n };\n /**\n * Detects if a packet's second byte is in the range of a PAC color code\n *\n * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n * 0x60 to 0x6f.\n *\n * @param {Integer} char1 The second byte\n * @return {Boolean} Whether the byte is a color PAC\n */\n\n Cea608Stream.prototype.isColorPAC = function (char1) {\n return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n };\n /**\n * Detects if a single byte is in the range of a normal character\n *\n * Normal text bytes are in the range 0x20 to 0x7f.\n *\n * @param {Integer} char The byte\n * @return {Boolean} Whether the byte is a normal character\n */\n\n Cea608Stream.prototype.isNormalChar = function (char) {\n return char >= 0x20 && char <= 0x7f;\n };\n /**\n * Configures roll-up\n *\n * @param {Integer} pts Current PTS\n * @param {Integer} newBaseRow Used by PACs to slide the current window to\n * a new position\n */\n\n Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n // Reset the base row to the bottom row when switching modes\n if (this.mode_ !== 'rollUp') {\n this.row_ = BOTTOM_ROW;\n this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n this.flushDisplayed(pts);\n this.nonDisplayed_ = createDisplayBuffer();\n this.displayed_ = createDisplayBuffer();\n }\n if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n // move currently displayed captions (up or down) to the new base row\n for (var i = 0; i < this.rollUpRows_; i++) {\n this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n this.displayed_[this.row_ - i] = '';\n }\n }\n if (newBaseRow === undefined) {\n newBaseRow = this.row_;\n }\n this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n }; // Adds the opening HTML tag for the passed character to the caption text,\n // and keeps track of it for later closing\n\n Cea608Stream.prototype.addFormatting = function (pts, format) {\n this.formatting_ = this.formatting_.concat(format);\n var text = format.reduce(function (text, format) {\n return text + '<' + format + '>';\n }, '');\n this[this.mode_](pts, text);\n }; // Adds HTML closing tags for current formatting to caption text and\n // clears remembered formatting\n\n Cea608Stream.prototype.clearFormatting = function (pts) {\n if (!this.formatting_.length) {\n return;\n }\n var text = this.formatting_.reverse().reduce(function (text, format) {\n return text + '</' + format + '>';\n }, '');\n this.formatting_ = [];\n this[this.mode_](pts, text);\n }; // Mode Implementations\n\n Cea608Stream.prototype.popOn = function (pts, text) {\n var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n baseRow += text;\n this.nonDisplayed_[this.row_] = baseRow;\n };\n Cea608Stream.prototype.rollUp = function (pts, text) {\n var baseRow = this.displayed_[this.row_];\n baseRow += text;\n this.displayed_[this.row_] = baseRow;\n };\n Cea608Stream.prototype.shiftRowsUp_ = function () {\n var i; // clear out inactive rows\n\n for (i = 0; i < this.topRow_; i++) {\n this.displayed_[i] = '';\n }\n for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n this.displayed_[i] = '';\n } // shift displayed rows up\n\n for (i = this.topRow_; i < this.row_; i++) {\n this.displayed_[i] = this.displayed_[i + 1];\n } // clear out the bottom row\n\n this.displayed_[this.row_] = '';\n };\n Cea608Stream.prototype.paintOn = function (pts, text) {\n var baseRow = this.displayed_[this.row_];\n baseRow += text;\n this.displayed_[this.row_] = baseRow;\n }; // exports\n\n var captionStream = {\n CaptionStream: CaptionStream$2,\n Cea608Stream: Cea608Stream,\n Cea708Stream: Cea708Stream\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var streamTypes = {\n H264_STREAM_TYPE: 0x1B,\n ADTS_STREAM_TYPE: 0x0F,\n METADATA_STREAM_TYPE: 0x15\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Accepts program elementary stream (PES) data events and corrects\n * decode and presentation time stamps to account for a rollover\n * of the 33 bit value.\n */\n\n var Stream$6 = stream;\n var MAX_TS = 8589934592;\n var RO_THRESH = 4294967296;\n var TYPE_SHARED = 'shared';\n var handleRollover$1 = function (value, reference) {\n var direction = 1;\n if (value > reference) {\n // If the current timestamp value is greater than our reference timestamp and we detect a\n // timestamp rollover, this means the roll over is happening in the opposite direction.\n // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n // rollover point. In loading this segment, the timestamp values will be very large,\n // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n // the time stamp to be `value - 2^33`.\n direction = -1;\n } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n // cause an incorrect adjustment.\n\n while (Math.abs(reference - value) > RO_THRESH) {\n value += direction * MAX_TS;\n }\n return value;\n };\n var TimestampRolloverStream$1 = function (type) {\n var lastDTS, referenceDTS;\n TimestampRolloverStream$1.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n // video and audio. We could use `undefined` here, but having a string\n // makes debugging a little clearer.\n\n this.type_ = type || TYPE_SHARED;\n this.push = function (data) {\n // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n // streams will only accept data that matches their type.\n if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n return;\n }\n if (referenceDTS === undefined) {\n referenceDTS = data.dts;\n }\n data.dts = handleRollover$1(data.dts, referenceDTS);\n data.pts = handleRollover$1(data.pts, referenceDTS);\n lastDTS = data.dts;\n this.trigger('data', data);\n };\n this.flush = function () {\n referenceDTS = lastDTS;\n this.trigger('done');\n };\n this.endTimeline = function () {\n this.flush();\n this.trigger('endedtimeline');\n };\n this.discontinuity = function () {\n referenceDTS = void 0;\n lastDTS = void 0;\n };\n this.reset = function () {\n this.discontinuity();\n this.trigger('reset');\n };\n };\n TimestampRolloverStream$1.prototype = new Stream$6();\n var timestampRolloverStream = {\n TimestampRolloverStream: TimestampRolloverStream$1,\n handleRollover: handleRollover$1\n }; // Once IE11 support is dropped, this function should be removed.\n\n var typedArrayIndexOf$1 = (typedArray, element, fromIndex) => {\n if (!typedArray) {\n return -1;\n }\n var currentIndex = fromIndex;\n for (; currentIndex < typedArray.length; currentIndex++) {\n if (typedArray[currentIndex] === element) {\n return currentIndex;\n }\n }\n return -1;\n };\n var typedArray = {\n typedArrayIndexOf: typedArrayIndexOf$1\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Tools for parsing ID3 frame data\n * @see http://id3.org/id3v2.3.0\n */\n\n var typedArrayIndexOf = typedArray.typedArrayIndexOf,\n // Frames that allow different types of text encoding contain a text\n // encoding description byte [ID3v2.4.0 section 4.]\n textEncodingDescriptionByte = {\n Iso88591: 0x00,\n // ISO-8859-1, terminated with \\0.\n Utf16: 0x01,\n // UTF-16 encoded Unicode BOM, terminated with \\0\\0\n Utf16be: 0x02,\n // UTF-16BE encoded Unicode, without BOM, terminated with \\0\\0\n Utf8: 0x03 // UTF-8 encoded Unicode, terminated with \\0\n },\n // return a percent-encoded representation of the specified byte range\n // @see http://en.wikipedia.org/wiki/Percent-encoding\n percentEncode$1 = function (bytes, start, end) {\n var i,\n result = '';\n for (i = start; i < end; i++) {\n result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n }\n return result;\n },\n // return the string representation of the specified byte range,\n // interpreted as UTf-8.\n parseUtf8 = function (bytes, start, end) {\n return decodeURIComponent(percentEncode$1(bytes, start, end));\n },\n // return the string representation of the specified byte range,\n // interpreted as ISO-8859-1.\n parseIso88591$1 = function (bytes, start, end) {\n return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line\n },\n parseSyncSafeInteger$1 = function (data) {\n return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n },\n frameParsers = {\n 'APIC': function (frame) {\n var i = 1,\n mimeTypeEndIndex,\n descriptionEndIndex,\n LINK_MIME_TYPE = '-->';\n if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {\n // ignore frames with unrecognized character encodings\n return;\n } // parsing fields [ID3v2.4.0 section 4.14.]\n\n mimeTypeEndIndex = typedArrayIndexOf(frame.data, 0, i);\n if (mimeTypeEndIndex < 0) {\n // malformed frame\n return;\n } // parsing Mime type field (terminated with \\0)\n\n frame.mimeType = parseIso88591$1(frame.data, i, mimeTypeEndIndex);\n i = mimeTypeEndIndex + 1; // parsing 1-byte Picture Type field\n\n frame.pictureType = frame.data[i];\n i++;\n descriptionEndIndex = typedArrayIndexOf(frame.data, 0, i);\n if (descriptionEndIndex < 0) {\n // malformed frame\n return;\n } // parsing Description field (terminated with \\0)\n\n frame.description = parseUtf8(frame.data, i, descriptionEndIndex);\n i = descriptionEndIndex + 1;\n if (frame.mimeType === LINK_MIME_TYPE) {\n // parsing Picture Data field as URL (always represented as ISO-8859-1 [ID3v2.4.0 section 4.])\n frame.url = parseIso88591$1(frame.data, i, frame.data.length);\n } else {\n // parsing Picture Data field as binary data\n frame.pictureData = frame.data.subarray(i, frame.data.length);\n }\n },\n 'T*': function (frame) {\n if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {\n // ignore frames with unrecognized character encodings\n return;\n } // parse text field, do not include null terminator in the frame value\n // frames that allow different types of encoding contain terminated text [ID3v2.4.0 section 4.]\n\n frame.value = parseUtf8(frame.data, 1, frame.data.length).replace(/\\0*$/, ''); // text information frames supports multiple strings, stored as a terminator separated list [ID3v2.4.0 section 4.2.]\n\n frame.values = frame.value.split('\\0');\n },\n 'TXXX': function (frame) {\n var descriptionEndIndex;\n if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {\n // ignore frames with unrecognized character encodings\n return;\n }\n descriptionEndIndex = typedArrayIndexOf(frame.data, 0, 1);\n if (descriptionEndIndex === -1) {\n return;\n } // parse the text fields\n\n frame.description = parseUtf8(frame.data, 1, descriptionEndIndex); // do not include the null terminator in the tag value\n // frames that allow different types of encoding contain terminated text\n // [ID3v2.4.0 section 4.]\n\n frame.value = parseUtf8(frame.data, descriptionEndIndex + 1, frame.data.length).replace(/\\0*$/, '');\n frame.data = frame.value;\n },\n 'W*': function (frame) {\n // parse URL field; URL fields are always represented as ISO-8859-1 [ID3v2.4.0 section 4.]\n // if the value is followed by a string termination all the following information should be ignored [ID3v2.4.0 section 4.3]\n frame.url = parseIso88591$1(frame.data, 0, frame.data.length).replace(/\\0.*$/, '');\n },\n 'WXXX': function (frame) {\n var descriptionEndIndex;\n if (frame.data[0] !== textEncodingDescriptionByte.Utf8) {\n // ignore frames with unrecognized character encodings\n return;\n }\n descriptionEndIndex = typedArrayIndexOf(frame.data, 0, 1);\n if (descriptionEndIndex === -1) {\n return;\n } // parse the description and URL fields\n\n frame.description = parseUtf8(frame.data, 1, descriptionEndIndex); // URL fields are always represented as ISO-8859-1 [ID3v2.4.0 section 4.]\n // if the value is followed by a string termination all the following information\n // should be ignored [ID3v2.4.0 section 4.3]\n\n frame.url = parseIso88591$1(frame.data, descriptionEndIndex + 1, frame.data.length).replace(/\\0.*$/, '');\n },\n 'PRIV': function (frame) {\n var i;\n for (i = 0; i < frame.data.length; i++) {\n if (frame.data[i] === 0) {\n // parse the description and URL fields\n frame.owner = parseIso88591$1(frame.data, 0, i);\n break;\n }\n }\n frame.privateData = frame.data.subarray(i + 1);\n frame.data = frame.privateData;\n }\n };\n var parseId3Frames$1 = function (data) {\n var frameSize,\n frameHeader,\n frameStart = 10,\n tagSize = 0,\n frames = []; // If we don't have enough data for a header, 10 bytes,\n // or 'ID3' in the first 3 bytes this is not a valid ID3 tag.\n\n if (data.length < 10 || data[0] !== 'I'.charCodeAt(0) || data[1] !== 'D'.charCodeAt(0) || data[2] !== '3'.charCodeAt(0)) {\n return;\n } // the frame size is transmitted as a 28-bit integer in the\n // last four bytes of the ID3 header.\n // The most significant bit of each byte is dropped and the\n // results concatenated to recover the actual value.\n\n tagSize = parseSyncSafeInteger$1(data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n // convenient for our comparisons to include it\n\n tagSize += 10; // check bit 6 of byte 5 for the extended header flag.\n\n var hasExtendedHeader = data[5] & 0x40;\n if (hasExtendedHeader) {\n // advance the frame start past the extended header\n frameStart += 4; // header size field\n\n frameStart += parseSyncSafeInteger$1(data.subarray(10, 14));\n tagSize -= parseSyncSafeInteger$1(data.subarray(16, 20)); // clip any padding off the end\n } // parse one or more ID3 frames\n // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n do {\n // determine the number of bytes in this frame\n frameSize = parseSyncSafeInteger$1(data.subarray(frameStart + 4, frameStart + 8));\n if (frameSize < 1) {\n break;\n }\n frameHeader = String.fromCharCode(data[frameStart], data[frameStart + 1], data[frameStart + 2], data[frameStart + 3]);\n var frame = {\n id: frameHeader,\n data: data.subarray(frameStart + 10, frameStart + frameSize + 10)\n };\n frame.key = frame.id; // parse frame values\n\n if (frameParsers[frame.id]) {\n // use frame specific parser\n frameParsers[frame.id](frame);\n } else if (frame.id[0] === 'T') {\n // use text frame generic parser\n frameParsers['T*'](frame);\n } else if (frame.id[0] === 'W') {\n // use URL link frame generic parser\n frameParsers['W*'](frame);\n }\n frames.push(frame);\n frameStart += 10; // advance past the frame header\n\n frameStart += frameSize; // advance past the frame body\n } while (frameStart < tagSize);\n return frames;\n };\n var parseId3 = {\n parseId3Frames: parseId3Frames$1,\n parseSyncSafeInteger: parseSyncSafeInteger$1,\n frameParsers: frameParsers\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Accepts program elementary stream (PES) data events and parses out\n * ID3 metadata from them, if present.\n * @see http://id3.org/id3v2.3.0\n */\n\n var Stream$5 = stream,\n StreamTypes$3 = streamTypes,\n id3 = parseId3,\n MetadataStream;\n MetadataStream = function (options) {\n var settings = {\n // the bytes of the program-level descriptor field in MP2T\n // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n // program element descriptors\"\n descriptor: options && options.descriptor\n },\n // the total size in bytes of the ID3 tag being parsed\n tagSize = 0,\n // tag data that is not complete enough to be parsed\n buffer = [],\n // the total number of bytes currently in the buffer\n bufferSize = 0,\n i;\n MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type\n // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n\n this.dispatchType = StreamTypes$3.METADATA_STREAM_TYPE.toString(16);\n if (settings.descriptor) {\n for (i = 0; i < settings.descriptor.length; i++) {\n this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n }\n }\n this.push = function (chunk) {\n var tag, frameStart, frameSize, frame, i, frameHeader;\n if (chunk.type !== 'timed-metadata') {\n return;\n } // if data_alignment_indicator is set in the PES header,\n // we must have the start of a new ID3 tag. Assume anything\n // remaining in the buffer was malformed and throw it out\n\n if (chunk.dataAlignmentIndicator) {\n bufferSize = 0;\n buffer.length = 0;\n } // ignore events that don't look like ID3 data\n\n if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {\n this.trigger('log', {\n level: 'warn',\n message: 'Skipping unrecognized metadata packet'\n });\n return;\n } // add this chunk to the data we've collected so far\n\n buffer.push(chunk);\n bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header\n\n if (buffer.length === 1) {\n // the frame size is transmitted as a 28-bit integer in the\n // last four bytes of the ID3 header.\n // The most significant bit of each byte is dropped and the\n // results concatenated to recover the actual value.\n tagSize = id3.parseSyncSafeInteger(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n // convenient for our comparisons to include it\n\n tagSize += 10;\n } // if the entire frame has not arrived, wait for more data\n\n if (bufferSize < tagSize) {\n return;\n } // collect the entire frame so it can be parsed\n\n tag = {\n data: new Uint8Array(tagSize),\n frames: [],\n pts: buffer[0].pts,\n dts: buffer[0].dts\n };\n for (i = 0; i < tagSize;) {\n tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n i += buffer[0].data.byteLength;\n bufferSize -= buffer[0].data.byteLength;\n buffer.shift();\n } // find the start of the first frame and the end of the tag\n\n frameStart = 10;\n if (tag.data[5] & 0x40) {\n // advance the frame start past the extended header\n frameStart += 4; // header size field\n\n frameStart += id3.parseSyncSafeInteger(tag.data.subarray(10, 14)); // clip any padding off the end\n\n tagSize -= id3.parseSyncSafeInteger(tag.data.subarray(16, 20));\n } // parse one or more ID3 frames\n // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n do {\n // determine the number of bytes in this frame\n frameSize = id3.parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));\n if (frameSize < 1) {\n this.trigger('log', {\n level: 'warn',\n message: 'Malformed ID3 frame encountered. Skipping remaining metadata parsing.'\n }); // If the frame is malformed, don't parse any further frames but allow previous valid parsed frames\n // to be sent along.\n\n break;\n }\n frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);\n frame = {\n id: frameHeader,\n data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n };\n frame.key = frame.id; // parse frame values\n\n if (id3.frameParsers[frame.id]) {\n // use frame specific parser\n id3.frameParsers[frame.id](frame);\n } else if (frame.id[0] === 'T') {\n // use text frame generic parser\n id3.frameParsers['T*'](frame);\n } else if (frame.id[0] === 'W') {\n // use URL link frame generic parser\n id3.frameParsers['W*'](frame);\n } // handle the special PRIV frame used to indicate the start\n // time for raw AAC data\n\n if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n var d = frame.data,\n size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n size *= 4;\n size += d[7] & 0x03;\n frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based\n // on the value of this frame\n // we couldn't have known the appropriate pts and dts before\n // parsing this ID3 tag so set those values now\n\n if (tag.pts === undefined && tag.dts === undefined) {\n tag.pts = frame.timeStamp;\n tag.dts = frame.timeStamp;\n }\n this.trigger('timestamp', frame);\n }\n tag.frames.push(frame);\n frameStart += 10; // advance past the frame header\n\n frameStart += frameSize; // advance past the frame body\n } while (frameStart < tagSize);\n this.trigger('data', tag);\n };\n };\n MetadataStream.prototype = new Stream$5();\n var metadataStream = MetadataStream;\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * A stream-based mp2t to mp4 converter. This utility can be used to\n * deliver mp4s to a SourceBuffer on platforms that support native\n * Media Source Extensions.\n */\n\n var Stream$4 = stream,\n CaptionStream$1 = captionStream,\n StreamTypes$2 = streamTypes,\n TimestampRolloverStream = timestampRolloverStream.TimestampRolloverStream; // object types\n\n var TransportPacketStream, TransportParseStream, ElementaryStream; // constants\n\n var MP2T_PACKET_LENGTH$1 = 188,\n // bytes\n SYNC_BYTE$1 = 0x47;\n /**\n * Splits an incoming stream of binary data into MPEG-2 Transport\n * Stream packets.\n */\n\n TransportPacketStream = function () {\n var buffer = new Uint8Array(MP2T_PACKET_LENGTH$1),\n bytesInBuffer = 0;\n TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.\n\n /**\n * Split a stream of data into M2TS packets\n **/\n\n this.push = function (bytes) {\n var startIndex = 0,\n endIndex = MP2T_PACKET_LENGTH$1,\n everything; // If there are bytes remaining from the last segment, prepend them to the\n // bytes that were pushed in\n\n if (bytesInBuffer) {\n everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n everything.set(buffer.subarray(0, bytesInBuffer));\n everything.set(bytes, bytesInBuffer);\n bytesInBuffer = 0;\n } else {\n everything = bytes;\n } // While we have enough data for a packet\n\n while (endIndex < everything.byteLength) {\n // Look for a pair of start and end sync bytes in the data..\n if (everything[startIndex] === SYNC_BYTE$1 && everything[endIndex] === SYNC_BYTE$1) {\n // We found a packet so emit it and jump one whole packet forward in\n // the stream\n this.trigger('data', everything.subarray(startIndex, endIndex));\n startIndex += MP2T_PACKET_LENGTH$1;\n endIndex += MP2T_PACKET_LENGTH$1;\n continue;\n } // If we get here, we have somehow become de-synchronized and we need to step\n // forward one byte at a time until we find a pair of sync bytes that denote\n // a packet\n\n startIndex++;\n endIndex++;\n } // If there was some data left over at the end of the segment that couldn't\n // possibly be a whole packet, keep it because it might be the start of a packet\n // that continues in the next segment\n\n if (startIndex < everything.byteLength) {\n buffer.set(everything.subarray(startIndex), 0);\n bytesInBuffer = everything.byteLength - startIndex;\n }\n };\n /**\n * Passes identified M2TS packets to the TransportParseStream to be parsed\n **/\n\n this.flush = function () {\n // If the buffer contains a whole packet when we are being flushed, emit it\n // and empty the buffer. Otherwise hold onto the data because it may be\n // important for decoding the next segment\n if (bytesInBuffer === MP2T_PACKET_LENGTH$1 && buffer[0] === SYNC_BYTE$1) {\n this.trigger('data', buffer);\n bytesInBuffer = 0;\n }\n this.trigger('done');\n };\n this.endTimeline = function () {\n this.flush();\n this.trigger('endedtimeline');\n };\n this.reset = function () {\n bytesInBuffer = 0;\n this.trigger('reset');\n };\n };\n TransportPacketStream.prototype = new Stream$4();\n /**\n * Accepts an MP2T TransportPacketStream and emits data events with parsed\n * forms of the individual transport stream packets.\n */\n\n TransportParseStream = function () {\n var parsePsi, parsePat, parsePmt, self;\n TransportParseStream.prototype.init.call(this);\n self = this;\n this.packetsWaitingForPmt = [];\n this.programMapTable = undefined;\n parsePsi = function (payload, psi) {\n var offset = 0; // PSI packets may be split into multiple sections and those\n // sections may be split into multiple packets. If a PSI\n // section starts in this packet, the payload_unit_start_indicator\n // will be true and the first byte of the payload will indicate\n // the offset from the current position to the start of the\n // section.\n\n if (psi.payloadUnitStartIndicator) {\n offset += payload[offset] + 1;\n }\n if (psi.type === 'pat') {\n parsePat(payload.subarray(offset), psi);\n } else {\n parsePmt(payload.subarray(offset), psi);\n }\n };\n parsePat = function (payload, pat) {\n pat.section_number = payload[7]; // eslint-disable-line camelcase\n\n pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n // skip the PSI header and parse the first PMT entry\n\n self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n pat.pmtPid = self.pmtPid;\n };\n /**\n * Parse out the relevant fields of a Program Map Table (PMT).\n * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n * packet. The first byte in this array should be the table_id\n * field.\n * @param pmt {object} the object that should be decorated with\n * fields parsed from the PMT.\n */\n\n parsePmt = function (payload, pmt) {\n var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually\n // take effect. We don't believe this should ever be the case\n // for HLS but we'll ignore \"forward\" PMT declarations if we see\n // them. Future PMT declarations have the current_next_indicator\n // set to zero.\n\n if (!(payload[5] & 0x01)) {\n return;\n } // overwrite any existing program map table\n\n self.programMapTable = {\n video: null,\n audio: null,\n 'timed-metadata': {}\n }; // the mapping table ends at the end of the current section\n\n sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n // long the program info descriptors are\n\n programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table\n\n offset = 12 + programInfoLength;\n while (offset < tableEnd) {\n var streamType = payload[offset];\n var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types\n // TODO: should this be done for metadata too? for now maintain behavior of\n // multiple metadata streams\n\n if (streamType === StreamTypes$2.H264_STREAM_TYPE && self.programMapTable.video === null) {\n self.programMapTable.video = pid;\n } else if (streamType === StreamTypes$2.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {\n self.programMapTable.audio = pid;\n } else if (streamType === StreamTypes$2.METADATA_STREAM_TYPE) {\n // map pid to stream type for metadata streams\n self.programMapTable['timed-metadata'][pid] = streamType;\n } // move to the next table entry\n // skip past the elementary stream descriptors, if present\n\n offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n } // record the map on the packet as well\n\n pmt.programMapTable = self.programMapTable;\n };\n /**\n * Deliver a new MP2T packet to the next stream in the pipeline.\n */\n\n this.push = function (packet) {\n var result = {},\n offset = 4;\n result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]\n\n result.pid = packet[1] & 0x1f;\n result.pid <<= 8;\n result.pid |= packet[2]; // if an adaption field is present, its length is specified by the\n // fifth byte of the TS packet header. The adaptation field is\n // used to add stuffing to PES packets that don't fill a complete\n // TS packet, and to specify some forms of timing and control data\n // that we do not currently use.\n\n if ((packet[3] & 0x30) >>> 4 > 0x01) {\n offset += packet[offset] + 1;\n } // parse the rest of the packet based on the type\n\n if (result.pid === 0) {\n result.type = 'pat';\n parsePsi(packet.subarray(offset), result);\n this.trigger('data', result);\n } else if (result.pid === this.pmtPid) {\n result.type = 'pmt';\n parsePsi(packet.subarray(offset), result);\n this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now\n\n while (this.packetsWaitingForPmt.length) {\n this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n }\n } else if (this.programMapTable === undefined) {\n // When we have not seen a PMT yet, defer further processing of\n // PES packets until one has been parsed\n this.packetsWaitingForPmt.push([packet, offset, result]);\n } else {\n this.processPes_(packet, offset, result);\n }\n };\n this.processPes_ = function (packet, offset, result) {\n // set the appropriate stream type\n if (result.pid === this.programMapTable.video) {\n result.streamType = StreamTypes$2.H264_STREAM_TYPE;\n } else if (result.pid === this.programMapTable.audio) {\n result.streamType = StreamTypes$2.ADTS_STREAM_TYPE;\n } else {\n // if not video or audio, it is timed-metadata or unknown\n // if unknown, streamType will be undefined\n result.streamType = this.programMapTable['timed-metadata'][result.pid];\n }\n result.type = 'pes';\n result.data = packet.subarray(offset);\n this.trigger('data', result);\n };\n };\n TransportParseStream.prototype = new Stream$4();\n TransportParseStream.STREAM_TYPES = {\n h264: 0x1b,\n adts: 0x0f\n };\n /**\n * Reconsistutes program elementary stream (PES) packets from parsed\n * transport stream packets. That is, if you pipe an\n * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n * events will be events which capture the bytes for individual PES\n * packets plus relevant metadata that has been extracted from the\n * container.\n */\n\n ElementaryStream = function () {\n var self = this,\n segmentHadPmt = false,\n // PES packet fragments\n video = {\n data: [],\n size: 0\n },\n audio = {\n data: [],\n size: 0\n },\n timedMetadata = {\n data: [],\n size: 0\n },\n programMapTable,\n parsePes = function (payload, pes) {\n var ptsDtsFlags;\n const startPrefix = payload[0] << 16 | payload[1] << 8 | payload[2]; // default to an empty array\n\n pes.data = new Uint8Array(); // In certain live streams, the start of a TS fragment has ts packets\n // that are frame data that is continuing from the previous fragment. This\n // is to check that the pes data is the start of a new pes payload\n\n if (startPrefix !== 1) {\n return;\n } // get the packet length, this will be 0 for video\n\n pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe\n\n pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value\n // and a DTS value. Determine what combination of values is\n // available to work with.\n\n ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number. Javascript\n // performs all bitwise operations on 32-bit integers but javascript\n // supports a much greater range (52-bits) of integer using standard\n // mathematical operations.\n // We construct a 31-bit value using bitwise operators over the 31\n // most significant bits and then multiply by 4 (equal to a left-shift\n // of 2) before we add the final 2 least significant bits of the\n // timestamp (equal to an OR.)\n\n if (ptsDtsFlags & 0xC0) {\n // the PTS and DTS are not written out directly. For information\n // on how they are encoded, see\n // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;\n pes.pts *= 4; // Left shift by 2\n\n pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n\n pes.dts = pes.pts;\n if (ptsDtsFlags & 0x40) {\n pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;\n pes.dts *= 4; // Left shift by 2\n\n pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n }\n } // the data section starts immediately after the PES header.\n // pes_header_data_length specifies the number of header bytes\n // that follow the last byte of the field.\n\n pes.data = payload.subarray(9 + payload[8]);\n },\n /**\n * Pass completely parsed PES packets to the next stream in the pipeline\n **/\n flushStream = function (stream, type, forceFlush) {\n var packetData = new Uint8Array(stream.size),\n event = {\n type: type\n },\n i = 0,\n offset = 0,\n packetFlushable = false,\n fragment; // do nothing if there is not enough buffered data for a complete\n // PES header\n\n if (!stream.data.length || stream.size < 9) {\n return;\n }\n event.trackId = stream.data[0].pid; // reassemble the packet\n\n for (i = 0; i < stream.data.length; i++) {\n fragment = stream.data[i];\n packetData.set(fragment.data, offset);\n offset += fragment.data.byteLength;\n } // parse assembled packet's PES header\n\n parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length\n // check that there is enough stream data to fill the packet\n\n packetFlushable = type === 'video' || event.packetLength <= stream.size; // flush pending packets if the conditions are right\n\n if (forceFlush || packetFlushable) {\n stream.size = 0;\n stream.data.length = 0;\n } // only emit packets that are complete. this is to avoid assembling\n // incomplete PES packets due to poor segmentation\n\n if (packetFlushable) {\n self.trigger('data', event);\n }\n };\n ElementaryStream.prototype.init.call(this);\n /**\n * Identifies M2TS packet types and parses PES packets using metadata\n * parsed from the PMT\n **/\n\n this.push = function (data) {\n ({\n pat: function () {// we have to wait for the PMT to arrive as well before we\n // have any meaningful metadata\n },\n pes: function () {\n var stream, streamType;\n switch (data.streamType) {\n case StreamTypes$2.H264_STREAM_TYPE:\n stream = video;\n streamType = 'video';\n break;\n case StreamTypes$2.ADTS_STREAM_TYPE:\n stream = audio;\n streamType = 'audio';\n break;\n case StreamTypes$2.METADATA_STREAM_TYPE:\n stream = timedMetadata;\n streamType = 'timed-metadata';\n break;\n default:\n // ignore unknown stream types\n return;\n } // if a new packet is starting, we can flush the completed\n // packet\n\n if (data.payloadUnitStartIndicator) {\n flushStream(stream, streamType, true);\n } // buffer this fragment until we are sure we've received the\n // complete payload\n\n stream.data.push(data);\n stream.size += data.data.byteLength;\n },\n pmt: function () {\n var event = {\n type: 'metadata',\n tracks: []\n };\n programMapTable = data.programMapTable; // translate audio and video streams to tracks\n\n if (programMapTable.video !== null) {\n event.tracks.push({\n timelineStartInfo: {\n baseMediaDecodeTime: 0\n },\n id: +programMapTable.video,\n codec: 'avc',\n type: 'video'\n });\n }\n if (programMapTable.audio !== null) {\n event.tracks.push({\n timelineStartInfo: {\n baseMediaDecodeTime: 0\n },\n id: +programMapTable.audio,\n codec: 'adts',\n type: 'audio'\n });\n }\n segmentHadPmt = true;\n self.trigger('data', event);\n }\n })[data.type]();\n };\n this.reset = function () {\n video.size = 0;\n video.data.length = 0;\n audio.size = 0;\n audio.data.length = 0;\n this.trigger('reset');\n };\n /**\n * Flush any remaining input. Video PES packets may be of variable\n * length. Normally, the start of a new video packet can trigger the\n * finalization of the previous packet. That is not possible if no\n * more video is forthcoming, however. In that case, some other\n * mechanism (like the end of the file) has to be employed. When it is\n * clear that no additional data is forthcoming, calling this method\n * will flush the buffered packets.\n */\n\n this.flushStreams_ = function () {\n // !!THIS ORDER IS IMPORTANT!!\n // video first then audio\n flushStream(video, 'video');\n flushStream(audio, 'audio');\n flushStream(timedMetadata, 'timed-metadata');\n };\n this.flush = function () {\n // if on flush we haven't had a pmt emitted\n // and we have a pmt to emit. emit the pmt\n // so that we trigger a trackinfo downstream.\n if (!segmentHadPmt && programMapTable) {\n var pmt = {\n type: 'metadata',\n tracks: []\n }; // translate audio and video streams to tracks\n\n if (programMapTable.video !== null) {\n pmt.tracks.push({\n timelineStartInfo: {\n baseMediaDecodeTime: 0\n },\n id: +programMapTable.video,\n codec: 'avc',\n type: 'video'\n });\n }\n if (programMapTable.audio !== null) {\n pmt.tracks.push({\n timelineStartInfo: {\n baseMediaDecodeTime: 0\n },\n id: +programMapTable.audio,\n codec: 'adts',\n type: 'audio'\n });\n }\n self.trigger('data', pmt);\n }\n segmentHadPmt = false;\n this.flushStreams_();\n this.trigger('done');\n };\n };\n ElementaryStream.prototype = new Stream$4();\n var m2ts$1 = {\n PAT_PID: 0x0000,\n MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH$1,\n TransportPacketStream: TransportPacketStream,\n TransportParseStream: TransportParseStream,\n ElementaryStream: ElementaryStream,\n TimestampRolloverStream: TimestampRolloverStream,\n CaptionStream: CaptionStream$1.CaptionStream,\n Cea608Stream: CaptionStream$1.Cea608Stream,\n Cea708Stream: CaptionStream$1.Cea708Stream,\n MetadataStream: metadataStream\n };\n for (var type in StreamTypes$2) {\n if (StreamTypes$2.hasOwnProperty(type)) {\n m2ts$1[type] = StreamTypes$2[type];\n }\n }\n var m2ts_1 = m2ts$1;\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var Stream$3 = stream;\n var ONE_SECOND_IN_TS$2 = clock$2.ONE_SECOND_IN_TS;\n var AdtsStream$1;\n var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n /*\n * Accepts a ElementaryStream and emits data events with parsed\n * AAC Audio Frames of the individual packets. Input audio in ADTS\n * format is unpacked and re-emitted as AAC frames.\n *\n * @see http://wiki.multimedia.cx/index.php?title=ADTS\n * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n */\n\n AdtsStream$1 = function (handlePartialSegments) {\n var buffer,\n frameNum = 0;\n AdtsStream$1.prototype.init.call(this);\n this.skipWarn_ = function (start, end) {\n this.trigger('log', {\n level: 'warn',\n message: `adts skiping bytes ${start} to ${end} in frame ${frameNum} outside syncword`\n });\n };\n this.push = function (packet) {\n var i = 0,\n frameLength,\n protectionSkipBytes,\n oldBuffer,\n sampleCount,\n adtsFrameDuration;\n if (!handlePartialSegments) {\n frameNum = 0;\n }\n if (packet.type !== 'audio') {\n // ignore non-audio data\n return;\n } // Prepend any data in the buffer to the input data so that we can parse\n // aac frames the cross a PES packet boundary\n\n if (buffer && buffer.length) {\n oldBuffer = buffer;\n buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n buffer.set(oldBuffer);\n buffer.set(packet.data, oldBuffer.byteLength);\n } else {\n buffer = packet.data;\n } // unpack any ADTS frames which have been fully received\n // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n\n var skip; // We use i + 7 here because we want to be able to parse the entire header.\n // If we don't have enough bytes to do that, then we definitely won't have a full frame.\n\n while (i + 7 < buffer.length) {\n // Look for the start of an ADTS header..\n if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n if (typeof skip !== 'number') {\n skip = i;\n } // If a valid header was not found, jump one forward and attempt to\n // find a valid ADTS header starting at the next byte\n\n i++;\n continue;\n }\n if (typeof skip === 'number') {\n this.skipWarn_(skip, i);\n skip = null;\n } // The protection skip bit tells us if we have 2 bytes of CRC data at the\n // end of the ADTS header\n\n protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the\n // end of the sync sequence\n // NOTE: frame length includes the size of the header\n\n frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;\n sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,\n // then we have to wait for more data\n\n if (buffer.byteLength - i < frameLength) {\n break;\n } // Otherwise, deliver the complete AAC frame\n\n this.trigger('data', {\n pts: packet.pts + frameNum * adtsFrameDuration,\n dts: packet.dts + frameNum * adtsFrameDuration,\n sampleCount: sampleCount,\n audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,\n channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,\n samplerate: ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2],\n samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n samplesize: 16,\n // data is the frame without it's header\n data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)\n });\n frameNum++;\n i += frameLength;\n }\n if (typeof skip === 'number') {\n this.skipWarn_(skip, i);\n skip = null;\n } // remove processed bytes from the buffer.\n\n buffer = buffer.subarray(i);\n };\n this.flush = function () {\n frameNum = 0;\n this.trigger('done');\n };\n this.reset = function () {\n buffer = void 0;\n this.trigger('reset');\n };\n this.endTimeline = function () {\n buffer = void 0;\n this.trigger('endedtimeline');\n };\n };\n AdtsStream$1.prototype = new Stream$3();\n var adts = AdtsStream$1;\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var ExpGolomb$1;\n /**\n * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n * scheme used by h264.\n */\n\n ExpGolomb$1 = function (workingData) {\n var\n // the number of bytes left to examine in workingData\n workingBytesAvailable = workingData.byteLength,\n // the current word being examined\n workingWord = 0,\n // :uint\n // the number of bits left to examine in the current word\n workingBitsAvailable = 0; // :uint;\n // ():uint\n\n this.length = function () {\n return 8 * workingBytesAvailable;\n }; // ():uint\n\n this.bitsAvailable = function () {\n return 8 * workingBytesAvailable + workingBitsAvailable;\n }; // ():void\n\n this.loadWord = function () {\n var position = workingData.byteLength - workingBytesAvailable,\n workingBytes = new Uint8Array(4),\n availableBytes = Math.min(4, workingBytesAvailable);\n if (availableBytes === 0) {\n throw new Error('no bytes available');\n }\n workingBytes.set(workingData.subarray(position, position + availableBytes));\n workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed\n\n workingBitsAvailable = availableBytes * 8;\n workingBytesAvailable -= availableBytes;\n }; // (count:int):void\n\n this.skipBits = function (count) {\n var skipBytes; // :int\n\n if (workingBitsAvailable > count) {\n workingWord <<= count;\n workingBitsAvailable -= count;\n } else {\n count -= workingBitsAvailable;\n skipBytes = Math.floor(count / 8);\n count -= skipBytes * 8;\n workingBytesAvailable -= skipBytes;\n this.loadWord();\n workingWord <<= count;\n workingBitsAvailable -= count;\n }\n }; // (size:int):uint\n\n this.readBits = function (size) {\n var bits = Math.min(workingBitsAvailable, size),\n // :uint\n valu = workingWord >>> 32 - bits; // :uint\n // if size > 31, handle error\n\n workingBitsAvailable -= bits;\n if (workingBitsAvailable > 0) {\n workingWord <<= bits;\n } else if (workingBytesAvailable > 0) {\n this.loadWord();\n }\n bits = size - bits;\n if (bits > 0) {\n return valu << bits | this.readBits(bits);\n }\n return valu;\n }; // ():uint\n\n this.skipLeadingZeros = function () {\n var leadingZeroCount; // :uint\n\n for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {\n // the first bit of working word is 1\n workingWord <<= leadingZeroCount;\n workingBitsAvailable -= leadingZeroCount;\n return leadingZeroCount;\n }\n } // we exhausted workingWord and still have not found a 1\n\n this.loadWord();\n return leadingZeroCount + this.skipLeadingZeros();\n }; // ():void\n\n this.skipUnsignedExpGolomb = function () {\n this.skipBits(1 + this.skipLeadingZeros());\n }; // ():void\n\n this.skipExpGolomb = function () {\n this.skipBits(1 + this.skipLeadingZeros());\n }; // ():uint\n\n this.readUnsignedExpGolomb = function () {\n var clz = this.skipLeadingZeros(); // :uint\n\n return this.readBits(clz + 1) - 1;\n }; // ():int\n\n this.readExpGolomb = function () {\n var valu = this.readUnsignedExpGolomb(); // :int\n\n if (0x01 & valu) {\n // the number is odd if the low order bit is set\n return 1 + valu >>> 1; // add 1 to make it even, and divide by 2\n }\n\n return -1 * (valu >>> 1); // divide by two then make it negative\n }; // Some convenience functions\n // :Boolean\n\n this.readBoolean = function () {\n return this.readBits(1) === 1;\n }; // ():int\n\n this.readUnsignedByte = function () {\n return this.readBits(8);\n };\n this.loadWord();\n };\n var expGolomb = ExpGolomb$1;\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var Stream$2 = stream;\n var ExpGolomb = expGolomb;\n var H264Stream$1, NalByteStream;\n var PROFILES_WITH_OPTIONAL_SPS_DATA;\n /**\n * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n */\n\n NalByteStream = function () {\n var syncPoint = 0,\n i,\n buffer;\n NalByteStream.prototype.init.call(this);\n /*\n * Scans a byte stream and triggers a data event with the NAL units found.\n * @param {Object} data Event received from H264Stream\n * @param {Uint8Array} data.data The h264 byte stream to be scanned\n *\n * @see H264Stream.push\n */\n\n this.push = function (data) {\n var swapBuffer;\n if (!buffer) {\n buffer = data.data;\n } else {\n swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n swapBuffer.set(buffer);\n swapBuffer.set(data.data, buffer.byteLength);\n buffer = swapBuffer;\n }\n var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B\n // scan for NAL unit boundaries\n // a match looks like this:\n // 0 0 1 .. NAL .. 0 0 1\n // ^ sync point ^ i\n // or this:\n // 0 0 1 .. NAL .. 0 0 0\n // ^ sync point ^ i\n // advance the sync point to a NAL start, if necessary\n\n for (; syncPoint < len - 3; syncPoint++) {\n if (buffer[syncPoint + 2] === 1) {\n // the sync point is properly aligned\n i = syncPoint + 5;\n break;\n }\n }\n while (i < len) {\n // look at the current byte to determine if we've hit the end of\n // a NAL unit boundary\n switch (buffer[i]) {\n case 0:\n // skip past non-sync sequences\n if (buffer[i - 1] !== 0) {\n i += 2;\n break;\n } else if (buffer[i - 2] !== 0) {\n i++;\n break;\n } // deliver the NAL unit if it isn't empty\n\n if (syncPoint + 3 !== i - 2) {\n this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n } // drop trailing zeroes\n\n do {\n i++;\n } while (buffer[i] !== 1 && i < len);\n syncPoint = i - 2;\n i += 3;\n break;\n case 1:\n // skip past non-sync sequences\n if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {\n i += 3;\n break;\n } // deliver the NAL unit\n\n this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n syncPoint = i - 2;\n i += 3;\n break;\n default:\n // the current byte isn't a one or zero, so it cannot be part\n // of a sync sequence\n i += 3;\n break;\n }\n } // filter out the NAL units that were delivered\n\n buffer = buffer.subarray(syncPoint);\n i -= syncPoint;\n syncPoint = 0;\n };\n this.reset = function () {\n buffer = null;\n syncPoint = 0;\n this.trigger('reset');\n };\n this.flush = function () {\n // deliver the last buffered NAL unit\n if (buffer && buffer.byteLength > 3) {\n this.trigger('data', buffer.subarray(syncPoint + 3));\n } // reset the stream state\n\n buffer = null;\n syncPoint = 0;\n this.trigger('done');\n };\n this.endTimeline = function () {\n this.flush();\n this.trigger('endedtimeline');\n };\n };\n NalByteStream.prototype = new Stream$2(); // values of profile_idc that indicate additional fields are included in the SPS\n // see Recommendation ITU-T H.264 (4/2013),\n // 7.3.2.1.1 Sequence parameter set data syntax\n\n PROFILES_WITH_OPTIONAL_SPS_DATA = {\n 100: true,\n 110: true,\n 122: true,\n 244: true,\n 44: true,\n 83: true,\n 86: true,\n 118: true,\n 128: true,\n // TODO: the three profiles below don't\n // appear to have sps data in the specificiation anymore?\n 138: true,\n 139: true,\n 134: true\n };\n /**\n * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n * events.\n */\n\n H264Stream$1 = function () {\n var nalByteStream = new NalByteStream(),\n self,\n trackId,\n currentPts,\n currentDts,\n discardEmulationPreventionBytes,\n readSequenceParameterSet,\n skipScalingList;\n H264Stream$1.prototype.init.call(this);\n self = this;\n /*\n * Pushes a packet from a stream onto the NalByteStream\n *\n * @param {Object} packet - A packet received from a stream\n * @param {Uint8Array} packet.data - The raw bytes of the packet\n * @param {Number} packet.dts - Decode timestamp of the packet\n * @param {Number} packet.pts - Presentation timestamp of the packet\n * @param {Number} packet.trackId - The id of the h264 track this packet came from\n * @param {('video'|'audio')} packet.type - The type of packet\n *\n */\n\n this.push = function (packet) {\n if (packet.type !== 'video') {\n return;\n }\n trackId = packet.trackId;\n currentPts = packet.pts;\n currentDts = packet.dts;\n nalByteStream.push(packet);\n };\n /*\n * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps\n * for the NALUs to the next stream component.\n * Also, preprocess caption and sequence parameter NALUs.\n *\n * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`\n * @see NalByteStream.push\n */\n\n nalByteStream.on('data', function (data) {\n var event = {\n trackId: trackId,\n pts: currentPts,\n dts: currentDts,\n data: data,\n nalUnitTypeCode: data[0] & 0x1f\n };\n switch (event.nalUnitTypeCode) {\n case 0x05:\n event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n break;\n case 0x06:\n event.nalUnitType = 'sei_rbsp';\n event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n break;\n case 0x07:\n event.nalUnitType = 'seq_parameter_set_rbsp';\n event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n event.config = readSequenceParameterSet(event.escapedRBSP);\n break;\n case 0x08:\n event.nalUnitType = 'pic_parameter_set_rbsp';\n break;\n case 0x09:\n event.nalUnitType = 'access_unit_delimiter_rbsp';\n break;\n } // This triggers data on the H264Stream\n\n self.trigger('data', event);\n });\n nalByteStream.on('done', function () {\n self.trigger('done');\n });\n nalByteStream.on('partialdone', function () {\n self.trigger('partialdone');\n });\n nalByteStream.on('reset', function () {\n self.trigger('reset');\n });\n nalByteStream.on('endedtimeline', function () {\n self.trigger('endedtimeline');\n });\n this.flush = function () {\n nalByteStream.flush();\n };\n this.partialFlush = function () {\n nalByteStream.partialFlush();\n };\n this.reset = function () {\n nalByteStream.reset();\n };\n this.endTimeline = function () {\n nalByteStream.endTimeline();\n };\n /**\n * Advance the ExpGolomb decoder past a scaling list. The scaling\n * list is optionally transmitted as part of a sequence parameter\n * set and is not relevant to transmuxing.\n * @param count {number} the number of entries in this scaling list\n * @param expGolombDecoder {object} an ExpGolomb pointed to the\n * start of a scaling list\n * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n */\n\n skipScalingList = function (count, expGolombDecoder) {\n var lastScale = 8,\n nextScale = 8,\n j,\n deltaScale;\n for (j = 0; j < count; j++) {\n if (nextScale !== 0) {\n deltaScale = expGolombDecoder.readExpGolomb();\n nextScale = (lastScale + deltaScale + 256) % 256;\n }\n lastScale = nextScale === 0 ? lastScale : nextScale;\n }\n };\n /**\n * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n * Sequence Payload\"\n * @param data {Uint8Array} the bytes of a RBSP from a NAL\n * unit\n * @return {Uint8Array} the RBSP without any Emulation\n * Prevention Bytes\n */\n\n discardEmulationPreventionBytes = function (data) {\n var length = data.byteLength,\n emulationPreventionBytesPositions = [],\n i = 1,\n newLength,\n newData; // Find all `Emulation Prevention Bytes`\n\n while (i < length - 2) {\n if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n emulationPreventionBytesPositions.push(i + 2);\n i += 2;\n } else {\n i++;\n }\n } // If no Emulation Prevention Bytes were found just return the original\n // array\n\n if (emulationPreventionBytesPositions.length === 0) {\n return data;\n } // Create a new array to hold the NAL unit data\n\n newLength = length - emulationPreventionBytesPositions.length;\n newData = new Uint8Array(newLength);\n var sourceIndex = 0;\n for (i = 0; i < newLength; sourceIndex++, i++) {\n if (sourceIndex === emulationPreventionBytesPositions[0]) {\n // Skip this byte\n sourceIndex++; // Remove this position index\n\n emulationPreventionBytesPositions.shift();\n }\n newData[i] = data[sourceIndex];\n }\n return newData;\n };\n /**\n * Read a sequence parameter set and return some interesting video\n * properties. A sequence parameter set is the H264 metadata that\n * describes the properties of upcoming video frames.\n * @param data {Uint8Array} the bytes of a sequence parameter set\n * @return {object} an object with configuration parsed from the\n * sequence parameter set, including the dimensions of the\n * associated video frames.\n */\n\n readSequenceParameterSet = function (data) {\n var frameCropLeftOffset = 0,\n frameCropRightOffset = 0,\n frameCropTopOffset = 0,\n frameCropBottomOffset = 0,\n expGolombDecoder,\n profileIdc,\n levelIdc,\n profileCompatibility,\n chromaFormatIdc,\n picOrderCntType,\n numRefFramesInPicOrderCntCycle,\n picWidthInMbsMinus1,\n picHeightInMapUnitsMinus1,\n frameMbsOnlyFlag,\n scalingListCount,\n sarRatio = [1, 1],\n aspectRatioIdc,\n i;\n expGolombDecoder = new ExpGolomb(data);\n profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n\n profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n\n levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n\n expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n // some profiles have more optional data we don't need\n\n if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n if (chromaFormatIdc === 3) {\n expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n }\n\n expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n\n expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n\n expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n\n if (expGolombDecoder.readBoolean()) {\n // seq_scaling_matrix_present_flag\n scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;\n for (i = 0; i < scalingListCount; i++) {\n if (expGolombDecoder.readBoolean()) {\n // seq_scaling_list_present_flag[ i ]\n if (i < 6) {\n skipScalingList(16, expGolombDecoder);\n } else {\n skipScalingList(64, expGolombDecoder);\n }\n }\n }\n }\n }\n expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n\n picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n if (picOrderCntType === 0) {\n expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n } else if (picOrderCntType === 1) {\n expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n\n expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n\n expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n\n numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n }\n }\n\n expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n\n expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n if (frameMbsOnlyFlag === 0) {\n expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n }\n\n expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n\n if (expGolombDecoder.readBoolean()) {\n // frame_cropping_flag\n frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n }\n if (expGolombDecoder.readBoolean()) {\n // vui_parameters_present_flag\n if (expGolombDecoder.readBoolean()) {\n // aspect_ratio_info_present_flag\n aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n switch (aspectRatioIdc) {\n case 1:\n sarRatio = [1, 1];\n break;\n case 2:\n sarRatio = [12, 11];\n break;\n case 3:\n sarRatio = [10, 11];\n break;\n case 4:\n sarRatio = [16, 11];\n break;\n case 5:\n sarRatio = [40, 33];\n break;\n case 6:\n sarRatio = [24, 11];\n break;\n case 7:\n sarRatio = [20, 11];\n break;\n case 8:\n sarRatio = [32, 11];\n break;\n case 9:\n sarRatio = [80, 33];\n break;\n case 10:\n sarRatio = [18, 11];\n break;\n case 11:\n sarRatio = [15, 11];\n break;\n case 12:\n sarRatio = [64, 33];\n break;\n case 13:\n sarRatio = [160, 99];\n break;\n case 14:\n sarRatio = [4, 3];\n break;\n case 15:\n sarRatio = [3, 2];\n break;\n case 16:\n sarRatio = [2, 1];\n break;\n case 255:\n {\n sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];\n break;\n }\n }\n if (sarRatio) {\n sarRatio[0] / sarRatio[1];\n }\n }\n }\n return {\n profileIdc: profileIdc,\n levelIdc: levelIdc,\n profileCompatibility: profileCompatibility,\n width: (picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2,\n height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,\n // sar is sample aspect ratio\n sarRatio: sarRatio\n };\n };\n };\n H264Stream$1.prototype = new Stream$2();\n var h264 = {\n H264Stream: H264Stream$1,\n NalByteStream: NalByteStream\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Utilities to detect basic properties and metadata about Aac data.\n */\n\n var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n var parseId3TagSize = function (header, byteIndex) {\n var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n flags = header[byteIndex + 5],\n footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0\n\n returnSize = returnSize >= 0 ? returnSize : 0;\n if (footerPresent) {\n return returnSize + 20;\n }\n return returnSize + 10;\n };\n var getId3Offset = function (data, offset) {\n if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {\n return offset;\n }\n offset += parseId3TagSize(data, offset);\n return getId3Offset(data, offset);\n }; // TODO: use vhs-utils\n\n var isLikelyAacData$1 = function (data) {\n var offset = getId3Offset(data, 0);\n return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 &&\n // verify that the 2 layer bits are 0, aka this\n // is not mp3 data but aac data.\n (data[offset + 1] & 0x16) === 0x10;\n };\n var parseSyncSafeInteger = function (data) {\n return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n }; // return a percent-encoded representation of the specified byte range\n // @see http://en.wikipedia.org/wiki/Percent-encoding\n\n var percentEncode = function (bytes, start, end) {\n var i,\n result = '';\n for (i = start; i < end; i++) {\n result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n }\n return result;\n }; // return the string representation of the specified byte range,\n // interpreted as ISO-8859-1.\n\n var parseIso88591 = function (bytes, start, end) {\n return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n };\n\n var parseAdtsSize = function (header, byteIndex) {\n var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n middle = header[byteIndex + 4] << 3,\n highTwo = header[byteIndex + 3] & 0x3 << 11;\n return highTwo | middle | lowThree;\n };\n var parseType$4 = function (header, byteIndex) {\n if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n return 'timed-metadata';\n } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n return 'audio';\n }\n return null;\n };\n var parseSampleRate = function (packet) {\n var i = 0;\n while (i + 5 < packet.length) {\n if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n // If a valid header was not found, jump one forward and attempt to\n // find a valid ADTS header starting at the next byte\n i++;\n continue;\n }\n return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n }\n return null;\n };\n var parseAacTimestamp = function (packet) {\n var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n frameStart = 10;\n if (packet[5] & 0x40) {\n // advance the frame start past the extended header\n frameStart += 4; // header size field\n\n frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n } // parse one or more ID3 frames\n // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n do {\n // determine the number of bytes in this frame\n frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n if (frameSize < 1) {\n return null;\n }\n frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n if (frameHeader === 'PRIV') {\n frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n for (var i = 0; i < frame.byteLength; i++) {\n if (frame[i] === 0) {\n var owner = parseIso88591(frame, 0, i);\n if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n var d = frame.subarray(i + 1);\n var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n size *= 4;\n size += d[7] & 0x03;\n return size;\n }\n break;\n }\n }\n }\n frameStart += 10; // advance past the frame header\n\n frameStart += frameSize; // advance past the frame body\n } while (frameStart < packet.byteLength);\n return null;\n };\n var utils = {\n isLikelyAacData: isLikelyAacData$1,\n parseId3TagSize: parseId3TagSize,\n parseAdtsSize: parseAdtsSize,\n parseType: parseType$4,\n parseSampleRate: parseSampleRate,\n parseAacTimestamp: parseAacTimestamp\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * A stream-based aac to mp4 converter. This utility can be used to\n * deliver mp4s to a SourceBuffer on platforms that support native\n * Media Source Extensions.\n */\n\n var Stream$1 = stream;\n var aacUtils = utils; // Constants\n\n var AacStream$1;\n /**\n * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n */\n\n AacStream$1 = function () {\n var everything = new Uint8Array(),\n timeStamp = 0;\n AacStream$1.prototype.init.call(this);\n this.setTimestamp = function (timestamp) {\n timeStamp = timestamp;\n };\n this.push = function (bytes) {\n var frameSize = 0,\n byteIndex = 0,\n bytesLeft,\n chunk,\n packet,\n tempLength; // If there are bytes remaining from the last segment, prepend them to the\n // bytes that were pushed in\n\n if (everything.length) {\n tempLength = everything.length;\n everything = new Uint8Array(bytes.byteLength + tempLength);\n everything.set(everything.subarray(0, tempLength));\n everything.set(bytes, tempLength);\n } else {\n everything = bytes;\n }\n while (everything.length - byteIndex >= 3) {\n if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {\n // Exit early because we don't have enough to parse\n // the ID3 tag header\n if (everything.length - byteIndex < 10) {\n break;\n } // check framesize\n\n frameSize = aacUtils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n // to emit a full packet\n // Add to byteIndex to support multiple ID3 tags in sequence\n\n if (byteIndex + frameSize > everything.length) {\n break;\n }\n chunk = {\n type: 'timed-metadata',\n data: everything.subarray(byteIndex, byteIndex + frameSize)\n };\n this.trigger('data', chunk);\n byteIndex += frameSize;\n continue;\n } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {\n // Exit early because we don't have enough to parse\n // the ADTS frame header\n if (everything.length - byteIndex < 7) {\n break;\n }\n frameSize = aacUtils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n // to emit a full packet\n\n if (byteIndex + frameSize > everything.length) {\n break;\n }\n packet = {\n type: 'audio',\n data: everything.subarray(byteIndex, byteIndex + frameSize),\n pts: timeStamp,\n dts: timeStamp\n };\n this.trigger('data', packet);\n byteIndex += frameSize;\n continue;\n }\n byteIndex++;\n }\n bytesLeft = everything.length - byteIndex;\n if (bytesLeft > 0) {\n everything = everything.subarray(byteIndex);\n } else {\n everything = new Uint8Array();\n }\n };\n this.reset = function () {\n everything = new Uint8Array();\n this.trigger('reset');\n };\n this.endTimeline = function () {\n everything = new Uint8Array();\n this.trigger('endedtimeline');\n };\n };\n AacStream$1.prototype = new Stream$1();\n var aac = AacStream$1;\n var AUDIO_PROPERTIES$1 = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];\n var audioProperties = AUDIO_PROPERTIES$1;\n var VIDEO_PROPERTIES$1 = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];\n var videoProperties = VIDEO_PROPERTIES$1;\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * A stream-based mp2t to mp4 converter. This utility can be used to\n * deliver mp4s to a SourceBuffer on platforms that support native\n * Media Source Extensions.\n */\n\n var Stream = stream;\n var mp4 = mp4Generator;\n var frameUtils = frameUtils$1;\n var audioFrameUtils = audioFrameUtils$1;\n var trackDecodeInfo = trackDecodeInfo$1;\n var m2ts = m2ts_1;\n var clock = clock$2;\n var AdtsStream = adts;\n var H264Stream = h264.H264Stream;\n var AacStream = aac;\n var isLikelyAacData = utils.isLikelyAacData;\n var ONE_SECOND_IN_TS$1 = clock$2.ONE_SECOND_IN_TS;\n var AUDIO_PROPERTIES = audioProperties;\n var VIDEO_PROPERTIES = videoProperties; // object types\n\n var VideoSegmentStream, AudioSegmentStream, Transmuxer, CoalesceStream;\n var retriggerForStream = function (key, event) {\n event.stream = key;\n this.trigger('log', event);\n };\n var addPipelineLogRetriggers = function (transmuxer, pipeline) {\n var keys = Object.keys(pipeline);\n for (var i = 0; i < keys.length; i++) {\n var key = keys[i]; // skip non-stream keys and headOfPipeline\n // which is just a duplicate\n\n if (key === 'headOfPipeline' || !pipeline[key].on) {\n continue;\n }\n pipeline[key].on('log', retriggerForStream.bind(transmuxer, key));\n }\n };\n /**\n * Compare two arrays (even typed) for same-ness\n */\n\n var arrayEquals = function (a, b) {\n var i;\n if (a.length !== b.length) {\n return false;\n } // compare the value of each element in the array\n\n for (i = 0; i < a.length; i++) {\n if (a[i] !== b[i]) {\n return false;\n }\n }\n return true;\n };\n var generateSegmentTimingInfo = function (baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {\n var ptsOffsetFromDts = startPts - startDts,\n decodeDuration = endDts - startDts,\n presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,\n // however, the player time values will reflect a start from the baseMediaDecodeTime.\n // In order to provide relevant values for the player times, base timing info on the\n // baseMediaDecodeTime and the DTS and PTS durations of the segment.\n\n return {\n start: {\n dts: baseMediaDecodeTime,\n pts: baseMediaDecodeTime + ptsOffsetFromDts\n },\n end: {\n dts: baseMediaDecodeTime + decodeDuration,\n pts: baseMediaDecodeTime + presentationDuration\n },\n prependedContentDuration: prependedContentDuration,\n baseMediaDecodeTime: baseMediaDecodeTime\n };\n };\n /**\n * Constructs a single-track, ISO BMFF media segment from AAC data\n * events. The output of this stream can be fed to a SourceBuffer\n * configured with a suitable initialization segment.\n * @param track {object} track metadata configuration\n * @param options {object} transmuxer options object\n * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n * in the source; false to adjust the first segment to start at 0.\n */\n\n AudioSegmentStream = function (track, options) {\n var adtsFrames = [],\n sequenceNumber,\n earliestAllowedDts = 0,\n audioAppendStartTs = 0,\n videoBaseMediaDecodeTime = Infinity;\n options = options || {};\n sequenceNumber = options.firstSequenceNumber || 0;\n AudioSegmentStream.prototype.init.call(this);\n this.push = function (data) {\n trackDecodeInfo.collectDtsInfo(track, data);\n if (track) {\n AUDIO_PROPERTIES.forEach(function (prop) {\n track[prop] = data[prop];\n });\n } // buffer audio data until end() is called\n\n adtsFrames.push(data);\n };\n this.setEarliestDts = function (earliestDts) {\n earliestAllowedDts = earliestDts;\n };\n this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n videoBaseMediaDecodeTime = baseMediaDecodeTime;\n };\n this.setAudioAppendStart = function (timestamp) {\n audioAppendStartTs = timestamp;\n };\n this.flush = function () {\n var frames, moof, mdat, boxes, frameDuration, segmentDuration, videoClockCyclesOfSilencePrefixed; // return early if no audio data has been observed\n\n if (adtsFrames.length === 0) {\n this.trigger('done', 'AudioSegmentStream');\n return;\n }\n frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);\n track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps); // amount of audio filled but the value is in video clock rather than audio clock\n\n videoClockCyclesOfSilencePrefixed = audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to\n // samples (that is, adts frames) in the audio data\n\n track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat\n\n mdat = mp4.mdat(audioFrameUtils.concatenateFrameData(frames));\n adtsFrames = [];\n moof = mp4.moof(sequenceNumber, [track]);\n boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time\n\n sequenceNumber++;\n boxes.set(moof);\n boxes.set(mdat, moof.byteLength);\n trackDecodeInfo.clearDtsInfo(track);\n frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with\n // tests) on adding the timingInfo event. However, it seems unlikely that there's a\n // valid use-case where an init segment/data should be triggered without associated\n // frames. Leaving for now, but should be looked into.\n\n if (frames.length) {\n segmentDuration = frames.length * frameDuration;\n this.trigger('segmentTimingInfo', generateSegmentTimingInfo(\n // The audio track's baseMediaDecodeTime is in audio clock cycles, but the\n // frame info is in video clock cycles. Convert to match expectation of\n // listeners (that all timestamps will be based on video clock cycles).\n clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate),\n // frame times are already in video clock, as is segment duration\n frames[0].dts, frames[0].pts, frames[0].dts + segmentDuration, frames[0].pts + segmentDuration, videoClockCyclesOfSilencePrefixed || 0));\n this.trigger('timingInfo', {\n start: frames[0].pts,\n end: frames[0].pts + segmentDuration\n });\n }\n this.trigger('data', {\n track: track,\n boxes: boxes\n });\n this.trigger('done', 'AudioSegmentStream');\n };\n this.reset = function () {\n trackDecodeInfo.clearDtsInfo(track);\n adtsFrames = [];\n this.trigger('reset');\n };\n };\n AudioSegmentStream.prototype = new Stream();\n /**\n * Constructs a single-track, ISO BMFF media segment from H264 data\n * events. The output of this stream can be fed to a SourceBuffer\n * configured with a suitable initialization segment.\n * @param track {object} track metadata configuration\n * @param options {object} transmuxer options object\n * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n * gopsToAlignWith list when attempting to align gop pts\n * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n * in the source; false to adjust the first segment to start at 0.\n */\n\n VideoSegmentStream = function (track, options) {\n var sequenceNumber,\n nalUnits = [],\n gopsToAlignWith = [],\n config,\n pps;\n options = options || {};\n sequenceNumber = options.firstSequenceNumber || 0;\n VideoSegmentStream.prototype.init.call(this);\n delete track.minPTS;\n this.gopCache_ = [];\n /**\n * Constructs a ISO BMFF segment given H264 nalUnits\n * @param {Object} nalUnit A data event representing a nalUnit\n * @param {String} nalUnit.nalUnitType\n * @param {Object} nalUnit.config Properties for a mp4 track\n * @param {Uint8Array} nalUnit.data The nalUnit bytes\n * @see lib/codecs/h264.js\n **/\n\n this.push = function (nalUnit) {\n trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config\n\n if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n config = nalUnit.config;\n track.sps = [nalUnit.data];\n VIDEO_PROPERTIES.forEach(function (prop) {\n track[prop] = config[prop];\n }, this);\n }\n if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {\n pps = nalUnit.data;\n track.pps = [nalUnit.data];\n } // buffer video until flush() is called\n\n nalUnits.push(nalUnit);\n };\n /**\n * Pass constructed ISO BMFF track and boxes on to the\n * next stream in the pipeline\n **/\n\n this.flush = function () {\n var frames,\n gopForFusion,\n gops,\n moof,\n mdat,\n boxes,\n prependedContentDuration = 0,\n firstGop,\n lastGop; // Throw away nalUnits at the start of the byte stream until\n // we find the first AUD\n\n while (nalUnits.length) {\n if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n break;\n }\n nalUnits.shift();\n } // Return early if no video data has been observed\n\n if (nalUnits.length === 0) {\n this.resetStream_();\n this.trigger('done', 'VideoSegmentStream');\n return;\n } // Organize the raw nal-units into arrays that represent\n // higher-level constructs such as frames and gops\n // (group-of-pictures)\n\n frames = frameUtils.groupNalsIntoFrames(nalUnits);\n gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have\n // a problem since MSE (on Chrome) requires a leading keyframe.\n //\n // We have two approaches to repairing this situation:\n // 1) GOP-FUSION:\n // This is where we keep track of the GOPS (group-of-pictures)\n // from previous fragments and attempt to find one that we can\n // prepend to the current fragment in order to create a valid\n // fragment.\n // 2) KEYFRAME-PULLING:\n // Here we search for the first keyframe in the fragment and\n // throw away all the frames between the start of the fragment\n // and that keyframe. We then extend the duration and pull the\n // PTS of the keyframe forward so that it covers the time range\n // of the frames that were disposed of.\n //\n // #1 is far prefereable over #2 which can cause \"stuttering\" but\n // requires more things to be just right.\n\n if (!gops[0][0].keyFrame) {\n // Search for a gop for fusion from our gopCache\n gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n if (gopForFusion) {\n // in order to provide more accurate timing information about the segment, save\n // the number of seconds prepended to the original segment due to GOP fusion\n prependedContentDuration = gopForFusion.duration;\n gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the\n // new gop at the beginning\n\n gops.byteLength += gopForFusion.byteLength;\n gops.nalCount += gopForFusion.nalCount;\n gops.pts = gopForFusion.pts;\n gops.dts = gopForFusion.dts;\n gops.duration += gopForFusion.duration;\n } else {\n // If we didn't find a candidate gop fall back to keyframe-pulling\n gops = frameUtils.extendFirstKeyFrame(gops);\n }\n } // Trim gops to align with gopsToAlignWith\n\n if (gopsToAlignWith.length) {\n var alignedGops;\n if (options.alignGopsAtEnd) {\n alignedGops = this.alignGopsAtEnd_(gops);\n } else {\n alignedGops = this.alignGopsAtStart_(gops);\n }\n if (!alignedGops) {\n // save all the nals in the last GOP into the gop cache\n this.gopCache_.unshift({\n gop: gops.pop(),\n pps: track.pps,\n sps: track.sps\n }); // Keep a maximum of 6 GOPs in the cache\n\n this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith\n\n this.resetStream_();\n this.trigger('done', 'VideoSegmentStream');\n return;\n } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n // when recalculated before sending off to CoalesceStream\n\n trackDecodeInfo.clearDtsInfo(track);\n gops = alignedGops;\n }\n trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to\n // samples (that is, frames) in the video data\n\n track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat\n\n mdat = mp4.mdat(frameUtils.concatenateNalData(gops));\n track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n this.trigger('processedGopsInfo', gops.map(function (gop) {\n return {\n pts: gop.pts,\n dts: gop.dts,\n byteLength: gop.byteLength\n };\n }));\n firstGop = gops[0];\n lastGop = gops[gops.length - 1];\n this.trigger('segmentTimingInfo', generateSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));\n this.trigger('timingInfo', {\n start: gops[0].pts,\n end: gops[gops.length - 1].pts + gops[gops.length - 1].duration\n }); // save all the nals in the last GOP into the gop cache\n\n this.gopCache_.unshift({\n gop: gops.pop(),\n pps: track.pps,\n sps: track.sps\n }); // Keep a maximum of 6 GOPs in the cache\n\n this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n nalUnits = [];\n this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n this.trigger('timelineStartInfo', track.timelineStartInfo);\n moof = mp4.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of\n // throwing away hundreds of media segment fragments\n\n boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time\n\n sequenceNumber++;\n boxes.set(moof);\n boxes.set(mdat, moof.byteLength);\n this.trigger('data', {\n track: track,\n boxes: boxes\n });\n this.resetStream_(); // Continue with the flush process now\n\n this.trigger('done', 'VideoSegmentStream');\n };\n this.reset = function () {\n this.resetStream_();\n nalUnits = [];\n this.gopCache_.length = 0;\n gopsToAlignWith.length = 0;\n this.trigger('reset');\n };\n this.resetStream_ = function () {\n trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments\n // for instance, when we are rendition switching\n\n config = undefined;\n pps = undefined;\n }; // Search for a candidate Gop for gop-fusion from the gop cache and\n // return it or return null if no good candidate was found\n\n this.getGopForFusion_ = function (nalUnit) {\n var halfSecond = 45000,\n // Half-a-second in a 90khz clock\n allowableOverlap = 10000,\n // About 3 frames @ 30fps\n nearestDistance = Infinity,\n dtsDistance,\n nearestGopObj,\n currentGop,\n currentGopObj,\n i; // Search for the GOP nearest to the beginning of this nal unit\n\n for (i = 0; i < this.gopCache_.length; i++) {\n currentGopObj = this.gopCache_[i];\n currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS\n\n if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n continue;\n } // Reject Gops that would require a negative baseMediaDecodeTime\n\n if (currentGop.dts < track.timelineStartInfo.dts) {\n continue;\n } // The distance between the end of the gop and the start of the nalUnit\n\n dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within\n // a half-second of the nal unit\n\n if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {\n // Always use the closest GOP we found if there is more than\n // one candidate\n if (!nearestGopObj || nearestDistance > dtsDistance) {\n nearestGopObj = currentGopObj;\n nearestDistance = dtsDistance;\n }\n }\n }\n if (nearestGopObj) {\n return nearestGopObj.gop;\n }\n return null;\n }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n // of gopsToAlignWith starting from the START of the list\n\n this.alignGopsAtStart_ = function (gops) {\n var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n byteLength = gops.byteLength;\n nalCount = gops.nalCount;\n duration = gops.duration;\n alignIndex = gopIndex = 0;\n while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n align = gopsToAlignWith[alignIndex];\n gop = gops[gopIndex];\n if (align.pts === gop.pts) {\n break;\n }\n if (gop.pts > align.pts) {\n // this current gop starts after the current gop we want to align on, so increment\n // align index\n alignIndex++;\n continue;\n } // current gop starts before the current gop we want to align on. so increment gop\n // index\n\n gopIndex++;\n byteLength -= gop.byteLength;\n nalCount -= gop.nalCount;\n duration -= gop.duration;\n }\n if (gopIndex === 0) {\n // no gops to trim\n return gops;\n }\n if (gopIndex === gops.length) {\n // all gops trimmed, skip appending all gops\n return null;\n }\n alignedGops = gops.slice(gopIndex);\n alignedGops.byteLength = byteLength;\n alignedGops.duration = duration;\n alignedGops.nalCount = nalCount;\n alignedGops.pts = alignedGops[0].pts;\n alignedGops.dts = alignedGops[0].dts;\n return alignedGops;\n }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n // of gopsToAlignWith starting from the END of the list\n\n this.alignGopsAtEnd_ = function (gops) {\n var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n alignIndex = gopsToAlignWith.length - 1;\n gopIndex = gops.length - 1;\n alignEndIndex = null;\n matchFound = false;\n while (alignIndex >= 0 && gopIndex >= 0) {\n align = gopsToAlignWith[alignIndex];\n gop = gops[gopIndex];\n if (align.pts === gop.pts) {\n matchFound = true;\n break;\n }\n if (align.pts > gop.pts) {\n alignIndex--;\n continue;\n }\n if (alignIndex === gopsToAlignWith.length - 1) {\n // gop.pts is greater than the last alignment candidate. If no match is found\n // by the end of this loop, we still want to append gops that come after this\n // point\n alignEndIndex = gopIndex;\n }\n gopIndex--;\n }\n if (!matchFound && alignEndIndex === null) {\n return null;\n }\n var trimIndex;\n if (matchFound) {\n trimIndex = gopIndex;\n } else {\n trimIndex = alignEndIndex;\n }\n if (trimIndex === 0) {\n return gops;\n }\n var alignedGops = gops.slice(trimIndex);\n var metadata = alignedGops.reduce(function (total, gop) {\n total.byteLength += gop.byteLength;\n total.duration += gop.duration;\n total.nalCount += gop.nalCount;\n return total;\n }, {\n byteLength: 0,\n duration: 0,\n nalCount: 0\n });\n alignedGops.byteLength = metadata.byteLength;\n alignedGops.duration = metadata.duration;\n alignedGops.nalCount = metadata.nalCount;\n alignedGops.pts = alignedGops[0].pts;\n alignedGops.dts = alignedGops[0].dts;\n return alignedGops;\n };\n this.alignGopsWith = function (newGopsToAlignWith) {\n gopsToAlignWith = newGopsToAlignWith;\n };\n };\n VideoSegmentStream.prototype = new Stream();\n /**\n * A Stream that can combine multiple streams (ie. audio & video)\n * into a single output segment for MSE. Also supports audio-only\n * and video-only streams.\n * @param options {object} transmuxer options object\n * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n * in the source; false to adjust the first segment to start at media timeline start.\n */\n\n CoalesceStream = function (options, metadataStream) {\n // Number of Tracks per output segment\n // If greater than 1, we combine multiple\n // tracks into a single segment\n this.numberOfTracks = 0;\n this.metadataStream = metadataStream;\n options = options || {};\n if (typeof options.remux !== 'undefined') {\n this.remuxTracks = !!options.remux;\n } else {\n this.remuxTracks = true;\n }\n if (typeof options.keepOriginalTimestamps === 'boolean') {\n this.keepOriginalTimestamps = options.keepOriginalTimestamps;\n } else {\n this.keepOriginalTimestamps = false;\n }\n this.pendingTracks = [];\n this.videoTrack = null;\n this.pendingBoxes = [];\n this.pendingCaptions = [];\n this.pendingMetadata = [];\n this.pendingBytes = 0;\n this.emittedTracks = 0;\n CoalesceStream.prototype.init.call(this); // Take output from multiple\n\n this.push = function (output) {\n // buffer incoming captions until the associated video segment\n // finishes\n if (output.text) {\n return this.pendingCaptions.push(output);\n } // buffer incoming id3 tags until the final flush\n\n if (output.frames) {\n return this.pendingMetadata.push(output);\n } // Add this track to the list of pending tracks and store\n // important information required for the construction of\n // the final segment\n\n this.pendingTracks.push(output.track);\n this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?\n // We unshift audio and push video because\n // as of Chrome 75 when switching from\n // one init segment to another if the video\n // mdat does not appear after the audio mdat\n // only audio will play for the duration of our transmux.\n\n if (output.track.type === 'video') {\n this.videoTrack = output.track;\n this.pendingBoxes.push(output.boxes);\n }\n if (output.track.type === 'audio') {\n this.audioTrack = output.track;\n this.pendingBoxes.unshift(output.boxes);\n }\n };\n };\n CoalesceStream.prototype = new Stream();\n CoalesceStream.prototype.flush = function (flushSource) {\n var offset = 0,\n event = {\n captions: [],\n captionStreams: {},\n metadata: [],\n info: {}\n },\n caption,\n id3,\n initSegment,\n timelineStartPts = 0,\n i;\n if (this.pendingTracks.length < this.numberOfTracks) {\n if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {\n // Return because we haven't received a flush from a data-generating\n // portion of the segment (meaning that we have only recieved meta-data\n // or captions.)\n return;\n } else if (this.remuxTracks) {\n // Return until we have enough tracks from the pipeline to remux (if we\n // are remuxing audio and video into a single MP4)\n return;\n } else if (this.pendingTracks.length === 0) {\n // In the case where we receive a flush without any data having been\n // received we consider it an emitted track for the purposes of coalescing\n // `done` events.\n // We do this for the case where there is an audio and video track in the\n // segment but no audio data. (seen in several playlists with alternate\n // audio tracks and no audio present in the main TS segments.)\n this.emittedTracks++;\n if (this.emittedTracks >= this.numberOfTracks) {\n this.trigger('done');\n this.emittedTracks = 0;\n }\n return;\n }\n }\n if (this.videoTrack) {\n timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n VIDEO_PROPERTIES.forEach(function (prop) {\n event.info[prop] = this.videoTrack[prop];\n }, this);\n } else if (this.audioTrack) {\n timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n AUDIO_PROPERTIES.forEach(function (prop) {\n event.info[prop] = this.audioTrack[prop];\n }, this);\n }\n if (this.videoTrack || this.audioTrack) {\n if (this.pendingTracks.length === 1) {\n event.type = this.pendingTracks[0].type;\n } else {\n event.type = 'combined';\n }\n this.emittedTracks += this.pendingTracks.length;\n initSegment = mp4.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment\n\n event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov\n // and track definitions\n\n event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats\n\n event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together\n\n for (i = 0; i < this.pendingBoxes.length; i++) {\n event.data.set(this.pendingBoxes[i], offset);\n offset += this.pendingBoxes[i].byteLength;\n } // Translate caption PTS times into second offsets to match the\n // video timeline for the segment, and add track info\n\n for (i = 0; i < this.pendingCaptions.length; i++) {\n caption = this.pendingCaptions[i];\n caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);\n caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);\n event.captionStreams[caption.stream] = true;\n event.captions.push(caption);\n } // Translate ID3 frame PTS times into second offsets to match the\n // video timeline for the segment\n\n for (i = 0; i < this.pendingMetadata.length; i++) {\n id3 = this.pendingMetadata[i];\n id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);\n event.metadata.push(id3);\n } // We add this to every single emitted segment even though we only need\n // it for the first\n\n event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state\n\n this.pendingTracks.length = 0;\n this.videoTrack = null;\n this.pendingBoxes.length = 0;\n this.pendingCaptions.length = 0;\n this.pendingBytes = 0;\n this.pendingMetadata.length = 0; // Emit the built segment\n // We include captions and ID3 tags for backwards compatibility,\n // ideally we should send only video and audio in the data event\n\n this.trigger('data', event); // Emit each caption to the outside world\n // Ideally, this would happen immediately on parsing captions,\n // but we need to ensure that video data is sent back first\n // so that caption timing can be adjusted to match video timing\n\n for (i = 0; i < event.captions.length; i++) {\n caption = event.captions[i];\n this.trigger('caption', caption);\n } // Emit each id3 tag to the outside world\n // Ideally, this would happen immediately on parsing the tag,\n // but we need to ensure that video data is sent back first\n // so that ID3 frame timing can be adjusted to match video timing\n\n for (i = 0; i < event.metadata.length; i++) {\n id3 = event.metadata[i];\n this.trigger('id3Frame', id3);\n }\n } // Only emit `done` if all tracks have been flushed and emitted\n\n if (this.emittedTracks >= this.numberOfTracks) {\n this.trigger('done');\n this.emittedTracks = 0;\n }\n };\n CoalesceStream.prototype.setRemux = function (val) {\n this.remuxTracks = val;\n };\n /**\n * A Stream that expects MP2T binary data as input and produces\n * corresponding media segments, suitable for use with Media Source\n * Extension (MSE) implementations that support the ISO BMFF byte\n * stream format, like Chrome.\n */\n\n Transmuxer = function (options) {\n var self = this,\n hasFlushed = true,\n videoTrack,\n audioTrack;\n Transmuxer.prototype.init.call(this);\n options = options || {};\n this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n this.transmuxPipeline_ = {};\n this.setupAacPipeline = function () {\n var pipeline = {};\n this.transmuxPipeline_ = pipeline;\n pipeline.type = 'aac';\n pipeline.metadataStream = new m2ts.MetadataStream(); // set up the parsing pipeline\n\n pipeline.aacStream = new AacStream();\n pipeline.audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');\n pipeline.timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');\n pipeline.adtsStream = new AdtsStream();\n pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream);\n pipeline.headOfPipeline = pipeline.aacStream;\n pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);\n pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);\n pipeline.metadataStream.on('timestamp', function (frame) {\n pipeline.aacStream.setTimestamp(frame.timeStamp);\n });\n pipeline.aacStream.on('data', function (data) {\n if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {\n return;\n }\n audioTrack = audioTrack || {\n timelineStartInfo: {\n baseMediaDecodeTime: self.baseMediaDecodeTime\n },\n codec: 'adts',\n type: 'audio'\n }; // hook up the audio segment stream to the first track with aac data\n\n pipeline.coalesceStream.numberOfTracks++;\n pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack, options);\n pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream); // emit pmt info\n\n self.trigger('trackinfo', {\n hasAudio: !!audioTrack,\n hasVideo: !!videoTrack\n });\n }); // Re-emit any data coming from the coalesce stream to the outside world\n\n pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline\n\n pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n addPipelineLogRetriggers(this, pipeline);\n };\n this.setupTsPipeline = function () {\n var pipeline = {};\n this.transmuxPipeline_ = pipeline;\n pipeline.type = 'ts';\n pipeline.metadataStream = new m2ts.MetadataStream(); // set up the parsing pipeline\n\n pipeline.packetStream = new m2ts.TransportPacketStream();\n pipeline.parseStream = new m2ts.TransportParseStream();\n pipeline.elementaryStream = new m2ts.ElementaryStream();\n pipeline.timestampRolloverStream = new m2ts.TimestampRolloverStream();\n pipeline.adtsStream = new AdtsStream();\n pipeline.h264Stream = new H264Stream();\n pipeline.captionStream = new m2ts.CaptionStream(options);\n pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream);\n pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams\n\n pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!\n // demux the streams\n\n pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);\n pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);\n pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream\n\n pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);\n pipeline.elementaryStream.on('data', function (data) {\n var i;\n if (data.type === 'metadata') {\n i = data.tracks.length; // scan the tracks listed in the metadata\n\n while (i--) {\n if (!videoTrack && data.tracks[i].type === 'video') {\n videoTrack = data.tracks[i];\n videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n } else if (!audioTrack && data.tracks[i].type === 'audio') {\n audioTrack = data.tracks[i];\n audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n }\n } // hook up the video segment stream to the first track with h264 data\n\n if (videoTrack && !pipeline.videoSegmentStream) {\n pipeline.coalesceStream.numberOfTracks++;\n pipeline.videoSegmentStream = new VideoSegmentStream(videoTrack, options);\n pipeline.videoSegmentStream.on('log', self.getLogTrigger_('videoSegmentStream'));\n pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {\n // When video emits timelineStartInfo data after a flush, we forward that\n // info to the AudioSegmentStream, if it exists, because video timeline\n // data takes precedence. Do not do this if keepOriginalTimestamps is set,\n // because this is a particularly subtle form of timestamp alteration.\n if (audioTrack && !options.keepOriginalTimestamps) {\n audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the\n // very earliest DTS we have seen in video because Chrome will\n // interpret any video track with a baseMediaDecodeTime that is\n // non-zero as a gap.\n\n pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - self.baseMediaDecodeTime);\n }\n });\n pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));\n pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));\n pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {\n if (audioTrack) {\n pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n }\n });\n pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline\n\n pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);\n }\n if (audioTrack && !pipeline.audioSegmentStream) {\n // hook up the audio segment stream to the first track with aac data\n pipeline.coalesceStream.numberOfTracks++;\n pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack, options);\n pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo'));\n pipeline.audioSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'audioSegmentTimingInfo')); // Set up the final part of the audio pipeline\n\n pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n } // emit pmt info\n\n self.trigger('trackinfo', {\n hasAudio: !!audioTrack,\n hasVideo: !!videoTrack\n });\n }\n }); // Re-emit any data coming from the coalesce stream to the outside world\n\n pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n pipeline.coalesceStream.on('id3Frame', function (id3Frame) {\n id3Frame.dispatchType = pipeline.metadataStream.dispatchType;\n self.trigger('id3Frame', id3Frame);\n });\n pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline\n\n pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n addPipelineLogRetriggers(this, pipeline);\n }; // hook up the segment streams once track metadata is delivered\n\n this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n var pipeline = this.transmuxPipeline_;\n if (!options.keepOriginalTimestamps) {\n this.baseMediaDecodeTime = baseMediaDecodeTime;\n }\n if (audioTrack) {\n audioTrack.timelineStartInfo.dts = undefined;\n audioTrack.timelineStartInfo.pts = undefined;\n trackDecodeInfo.clearDtsInfo(audioTrack);\n if (pipeline.audioTimestampRolloverStream) {\n pipeline.audioTimestampRolloverStream.discontinuity();\n }\n }\n if (videoTrack) {\n if (pipeline.videoSegmentStream) {\n pipeline.videoSegmentStream.gopCache_ = [];\n }\n videoTrack.timelineStartInfo.dts = undefined;\n videoTrack.timelineStartInfo.pts = undefined;\n trackDecodeInfo.clearDtsInfo(videoTrack);\n pipeline.captionStream.reset();\n }\n if (pipeline.timestampRolloverStream) {\n pipeline.timestampRolloverStream.discontinuity();\n }\n };\n this.setAudioAppendStart = function (timestamp) {\n if (audioTrack) {\n this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n }\n };\n this.setRemux = function (val) {\n var pipeline = this.transmuxPipeline_;\n options.remux = val;\n if (pipeline && pipeline.coalesceStream) {\n pipeline.coalesceStream.setRemux(val);\n }\n };\n this.alignGopsWith = function (gopsToAlignWith) {\n if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n }\n };\n this.getLogTrigger_ = function (key) {\n var self = this;\n return function (event) {\n event.stream = key;\n self.trigger('log', event);\n };\n }; // feed incoming data to the front of the parsing pipeline\n\n this.push = function (data) {\n if (hasFlushed) {\n var isAac = isLikelyAacData(data);\n if (isAac && this.transmuxPipeline_.type !== 'aac') {\n this.setupAacPipeline();\n } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n this.setupTsPipeline();\n }\n hasFlushed = false;\n }\n this.transmuxPipeline_.headOfPipeline.push(data);\n }; // flush any buffered data\n\n this.flush = function () {\n hasFlushed = true; // Start at the top of the pipeline and flush all pending work\n\n this.transmuxPipeline_.headOfPipeline.flush();\n };\n this.endTimeline = function () {\n this.transmuxPipeline_.headOfPipeline.endTimeline();\n };\n this.reset = function () {\n if (this.transmuxPipeline_.headOfPipeline) {\n this.transmuxPipeline_.headOfPipeline.reset();\n }\n }; // Caption data has to be reset when seeking outside buffered range\n\n this.resetCaptions = function () {\n if (this.transmuxPipeline_.captionStream) {\n this.transmuxPipeline_.captionStream.reset();\n }\n };\n };\n Transmuxer.prototype = new Stream();\n var transmuxer = {\n Transmuxer: Transmuxer,\n VideoSegmentStream: VideoSegmentStream,\n AudioSegmentStream: AudioSegmentStream,\n AUDIO_PROPERTIES: AUDIO_PROPERTIES,\n VIDEO_PROPERTIES: VIDEO_PROPERTIES,\n // exported for testing\n generateSegmentTimingInfo: generateSegmentTimingInfo\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n\n var toUnsigned$3 = function (value) {\n return value >>> 0;\n };\n var toHexString$1 = function (value) {\n return ('00' + value.toString(16)).slice(-2);\n };\n var bin = {\n toUnsigned: toUnsigned$3,\n toHexString: toHexString$1\n };\n var parseType$3 = function (buffer) {\n var result = '';\n result += String.fromCharCode(buffer[0]);\n result += String.fromCharCode(buffer[1]);\n result += String.fromCharCode(buffer[2]);\n result += String.fromCharCode(buffer[3]);\n return result;\n };\n var parseType_1 = parseType$3;\n var toUnsigned$2 = bin.toUnsigned;\n var parseType$2 = parseType_1;\n var findBox$2 = function (data, path) {\n var results = [],\n i,\n size,\n type,\n end,\n subresults;\n if (!path.length) {\n // short-circuit the search for empty paths\n return null;\n }\n for (i = 0; i < data.byteLength;) {\n size = toUnsigned$2(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);\n type = parseType$2(data.subarray(i + 4, i + 8));\n end = size > 1 ? i + size : data.byteLength;\n if (type === path[0]) {\n if (path.length === 1) {\n // this is the end of the path and we've found the box we were\n // looking for\n results.push(data.subarray(i + 8, end));\n } else {\n // recursively search for the next box along the path\n subresults = findBox$2(data.subarray(i + 8, end), path.slice(1));\n if (subresults.length) {\n results = results.concat(subresults);\n }\n }\n }\n i = end;\n } // we've finished searching all of data\n\n return results;\n };\n var findBox_1 = findBox$2;\n var toUnsigned$1 = bin.toUnsigned;\n var getUint64$2 = numbers.getUint64;\n var tfdt = function (data) {\n var result = {\n version: data[0],\n flags: new Uint8Array(data.subarray(1, 4))\n };\n if (result.version === 1) {\n result.baseMediaDecodeTime = getUint64$2(data.subarray(4));\n } else {\n result.baseMediaDecodeTime = toUnsigned$1(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);\n }\n return result;\n };\n var parseTfdt$2 = tfdt;\n var parseSampleFlags$1 = function (flags) {\n return {\n isLeading: (flags[0] & 0x0c) >>> 2,\n dependsOn: flags[0] & 0x03,\n isDependedOn: (flags[1] & 0xc0) >>> 6,\n hasRedundancy: (flags[1] & 0x30) >>> 4,\n paddingValue: (flags[1] & 0x0e) >>> 1,\n isNonSyncSample: flags[1] & 0x01,\n degradationPriority: flags[2] << 8 | flags[3]\n };\n };\n var parseSampleFlags_1 = parseSampleFlags$1;\n var parseSampleFlags = parseSampleFlags_1;\n var trun = function (data) {\n var result = {\n version: data[0],\n flags: new Uint8Array(data.subarray(1, 4)),\n samples: []\n },\n view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n // Flag interpretation\n dataOffsetPresent = result.flags[2] & 0x01,\n // compare with 2nd byte of 0x1\n firstSampleFlagsPresent = result.flags[2] & 0x04,\n // compare with 2nd byte of 0x4\n sampleDurationPresent = result.flags[1] & 0x01,\n // compare with 2nd byte of 0x100\n sampleSizePresent = result.flags[1] & 0x02,\n // compare with 2nd byte of 0x200\n sampleFlagsPresent = result.flags[1] & 0x04,\n // compare with 2nd byte of 0x400\n sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,\n // compare with 2nd byte of 0x800\n sampleCount = view.getUint32(4),\n offset = 8,\n sample;\n if (dataOffsetPresent) {\n // 32 bit signed integer\n result.dataOffset = view.getInt32(offset);\n offset += 4;\n } // Overrides the flags for the first sample only. The order of\n // optional values will be: duration, size, compositionTimeOffset\n\n if (firstSampleFlagsPresent && sampleCount) {\n sample = {\n flags: parseSampleFlags(data.subarray(offset, offset + 4))\n };\n offset += 4;\n if (sampleDurationPresent) {\n sample.duration = view.getUint32(offset);\n offset += 4;\n }\n if (sampleSizePresent) {\n sample.size = view.getUint32(offset);\n offset += 4;\n }\n if (sampleCompositionTimeOffsetPresent) {\n if (result.version === 1) {\n sample.compositionTimeOffset = view.getInt32(offset);\n } else {\n sample.compositionTimeOffset = view.getUint32(offset);\n }\n offset += 4;\n }\n result.samples.push(sample);\n sampleCount--;\n }\n while (sampleCount--) {\n sample = {};\n if (sampleDurationPresent) {\n sample.duration = view.getUint32(offset);\n offset += 4;\n }\n if (sampleSizePresent) {\n sample.size = view.getUint32(offset);\n offset += 4;\n }\n if (sampleFlagsPresent) {\n sample.flags = parseSampleFlags(data.subarray(offset, offset + 4));\n offset += 4;\n }\n if (sampleCompositionTimeOffsetPresent) {\n if (result.version === 1) {\n sample.compositionTimeOffset = view.getInt32(offset);\n } else {\n sample.compositionTimeOffset = view.getUint32(offset);\n }\n offset += 4;\n }\n result.samples.push(sample);\n }\n return result;\n };\n var parseTrun$2 = trun;\n var tfhd = function (data) {\n var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n result = {\n version: data[0],\n flags: new Uint8Array(data.subarray(1, 4)),\n trackId: view.getUint32(4)\n },\n baseDataOffsetPresent = result.flags[2] & 0x01,\n sampleDescriptionIndexPresent = result.flags[2] & 0x02,\n defaultSampleDurationPresent = result.flags[2] & 0x08,\n defaultSampleSizePresent = result.flags[2] & 0x10,\n defaultSampleFlagsPresent = result.flags[2] & 0x20,\n durationIsEmpty = result.flags[0] & 0x010000,\n defaultBaseIsMoof = result.flags[0] & 0x020000,\n i;\n i = 8;\n if (baseDataOffsetPresent) {\n i += 4; // truncate top 4 bytes\n // FIXME: should we read the full 64 bits?\n\n result.baseDataOffset = view.getUint32(12);\n i += 4;\n }\n if (sampleDescriptionIndexPresent) {\n result.sampleDescriptionIndex = view.getUint32(i);\n i += 4;\n }\n if (defaultSampleDurationPresent) {\n result.defaultSampleDuration = view.getUint32(i);\n i += 4;\n }\n if (defaultSampleSizePresent) {\n result.defaultSampleSize = view.getUint32(i);\n i += 4;\n }\n if (defaultSampleFlagsPresent) {\n result.defaultSampleFlags = view.getUint32(i);\n }\n if (durationIsEmpty) {\n result.durationIsEmpty = true;\n }\n if (!baseDataOffsetPresent && defaultBaseIsMoof) {\n result.baseDataOffsetIsMoof = true;\n }\n return result;\n };\n var parseTfhd$2 = tfhd;\n var win;\n if (typeof window !== \"undefined\") {\n win = window;\n } else if (typeof commonjsGlobal !== \"undefined\") {\n win = commonjsGlobal;\n } else if (typeof self !== \"undefined\") {\n win = self;\n } else {\n win = {};\n }\n var window_1 = win;\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Reads in-band CEA-708 captions out of FMP4 segments.\n * @see https://en.wikipedia.org/wiki/CEA-708\n */\n\n var discardEmulationPreventionBytes = captionPacketParser.discardEmulationPreventionBytes;\n var CaptionStream = captionStream.CaptionStream;\n var findBox$1 = findBox_1;\n var parseTfdt$1 = parseTfdt$2;\n var parseTrun$1 = parseTrun$2;\n var parseTfhd$1 = parseTfhd$2;\n var window$2 = window_1;\n /**\n * Maps an offset in the mdat to a sample based on the the size of the samples.\n * Assumes that `parseSamples` has been called first.\n *\n * @param {Number} offset - The offset into the mdat\n * @param {Object[]} samples - An array of samples, parsed using `parseSamples`\n * @return {?Object} The matching sample, or null if no match was found.\n *\n * @see ISO-BMFF-12/2015, Section 8.8.8\n **/\n\n var mapToSample = function (offset, samples) {\n var approximateOffset = offset;\n for (var i = 0; i < samples.length; i++) {\n var sample = samples[i];\n if (approximateOffset < sample.size) {\n return sample;\n }\n approximateOffset -= sample.size;\n }\n return null;\n };\n /**\n * Finds SEI nal units contained in a Media Data Box.\n * Assumes that `parseSamples` has been called first.\n *\n * @param {Uint8Array} avcStream - The bytes of the mdat\n * @param {Object[]} samples - The samples parsed out by `parseSamples`\n * @param {Number} trackId - The trackId of this video track\n * @return {Object[]} seiNals - the parsed SEI NALUs found.\n * The contents of the seiNal should match what is expected by\n * CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)\n *\n * @see ISO-BMFF-12/2015, Section 8.1.1\n * @see Rec. ITU-T H.264, 7.3.2.3.1\n **/\n\n var findSeiNals = function (avcStream, samples, trackId) {\n var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n result = {\n logs: [],\n seiNals: []\n },\n seiNal,\n i,\n length,\n lastMatchedSample;\n for (i = 0; i + 4 < avcStream.length; i += length) {\n length = avcView.getUint32(i);\n i += 4; // Bail if this doesn't appear to be an H264 stream\n\n if (length <= 0) {\n continue;\n }\n switch (avcStream[i] & 0x1F) {\n case 0x06:\n var data = avcStream.subarray(i + 1, i + 1 + length);\n var matchingSample = mapToSample(i, samples);\n seiNal = {\n nalUnitType: 'sei_rbsp',\n size: length,\n data: data,\n escapedRBSP: discardEmulationPreventionBytes(data),\n trackId: trackId\n };\n if (matchingSample) {\n seiNal.pts = matchingSample.pts;\n seiNal.dts = matchingSample.dts;\n lastMatchedSample = matchingSample;\n } else if (lastMatchedSample) {\n // If a matching sample cannot be found, use the last\n // sample's values as they should be as close as possible\n seiNal.pts = lastMatchedSample.pts;\n seiNal.dts = lastMatchedSample.dts;\n } else {\n result.logs.push({\n level: 'warn',\n message: 'We\\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'\n });\n break;\n }\n result.seiNals.push(seiNal);\n break;\n }\n }\n return result;\n };\n /**\n * Parses sample information out of Track Run Boxes and calculates\n * the absolute presentation and decode timestamps of each sample.\n *\n * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed\n * @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt\n @see ISO-BMFF-12/2015, Section 8.8.12\n * @param {Object} tfhd - The parsed Track Fragment Header\n * @see inspect.parseTfhd\n * @return {Object[]} the parsed samples\n *\n * @see ISO-BMFF-12/2015, Section 8.8.8\n **/\n\n var parseSamples = function (truns, baseMediaDecodeTime, tfhd) {\n var currentDts = baseMediaDecodeTime;\n var defaultSampleDuration = tfhd.defaultSampleDuration || 0;\n var defaultSampleSize = tfhd.defaultSampleSize || 0;\n var trackId = tfhd.trackId;\n var allSamples = [];\n truns.forEach(function (trun) {\n // Note: We currently do not parse the sample table as well\n // as the trun. It's possible some sources will require this.\n // moov > trak > mdia > minf > stbl\n var trackRun = parseTrun$1(trun);\n var samples = trackRun.samples;\n samples.forEach(function (sample) {\n if (sample.duration === undefined) {\n sample.duration = defaultSampleDuration;\n }\n if (sample.size === undefined) {\n sample.size = defaultSampleSize;\n }\n sample.trackId = trackId;\n sample.dts = currentDts;\n if (sample.compositionTimeOffset === undefined) {\n sample.compositionTimeOffset = 0;\n }\n if (typeof currentDts === 'bigint') {\n sample.pts = currentDts + window$2.BigInt(sample.compositionTimeOffset);\n currentDts += window$2.BigInt(sample.duration);\n } else {\n sample.pts = currentDts + sample.compositionTimeOffset;\n currentDts += sample.duration;\n }\n });\n allSamples = allSamples.concat(samples);\n });\n return allSamples;\n };\n /**\n * Parses out caption nals from an FMP4 segment's video tracks.\n *\n * @param {Uint8Array} segment - The bytes of a single segment\n * @param {Number} videoTrackId - The trackId of a video track in the segment\n * @return {Object.<Number, Object[]>} A mapping of video trackId to\n * a list of seiNals found in that track\n **/\n\n var parseCaptionNals = function (segment, videoTrackId) {\n // To get the samples\n var trafs = findBox$1(segment, ['moof', 'traf']); // To get SEI NAL units\n\n var mdats = findBox$1(segment, ['mdat']);\n var captionNals = {};\n var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs\n\n mdats.forEach(function (mdat, index) {\n var matchingTraf = trafs[index];\n mdatTrafPairs.push({\n mdat: mdat,\n traf: matchingTraf\n });\n });\n mdatTrafPairs.forEach(function (pair) {\n var mdat = pair.mdat;\n var traf = pair.traf;\n var tfhd = findBox$1(traf, ['tfhd']); // Exactly 1 tfhd per traf\n\n var headerInfo = parseTfhd$1(tfhd[0]);\n var trackId = headerInfo.trackId;\n var tfdt = findBox$1(traf, ['tfdt']); // Either 0 or 1 tfdt per traf\n\n var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt$1(tfdt[0]).baseMediaDecodeTime : 0;\n var truns = findBox$1(traf, ['trun']);\n var samples;\n var result; // Only parse video data for the chosen video track\n\n if (videoTrackId === trackId && truns.length > 0) {\n samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);\n result = findSeiNals(mdat, samples, trackId);\n if (!captionNals[trackId]) {\n captionNals[trackId] = {\n seiNals: [],\n logs: []\n };\n }\n captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);\n captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);\n }\n });\n return captionNals;\n };\n /**\n * Parses out inband captions from an MP4 container and returns\n * caption objects that can be used by WebVTT and the TextTrack API.\n * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack\n * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first\n *\n * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n * @param {Number} trackId - The id of the video track to parse\n * @param {Number} timescale - The timescale for the video track from the init segment\n *\n * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks\n * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds\n * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds\n * @return {String} parsedCaptions[].text - The visible content of the caption\n **/\n\n var parseEmbeddedCaptions = function (segment, trackId, timescale) {\n var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n\n if (trackId === null) {\n return null;\n }\n captionNals = parseCaptionNals(segment, trackId);\n var trackNals = captionNals[trackId] || {};\n return {\n seiNals: trackNals.seiNals,\n logs: trackNals.logs,\n timescale: timescale\n };\n };\n /**\n * Converts SEI NALUs into captions that can be used by video.js\n **/\n\n var CaptionParser = function () {\n var isInitialized = false;\n var captionStream; // Stores segments seen before trackId and timescale are set\n\n var segmentCache; // Stores video track ID of the track being parsed\n\n var trackId; // Stores the timescale of the track being parsed\n\n var timescale; // Stores captions parsed so far\n\n var parsedCaptions; // Stores whether we are receiving partial data or not\n\n var parsingPartial;\n /**\n * A method to indicate whether a CaptionParser has been initalized\n * @returns {Boolean}\n **/\n\n this.isInitialized = function () {\n return isInitialized;\n };\n /**\n * Initializes the underlying CaptionStream, SEI NAL parsing\n * and management, and caption collection\n **/\n\n this.init = function (options) {\n captionStream = new CaptionStream();\n isInitialized = true;\n parsingPartial = options ? options.isPartial : false; // Collect dispatched captions\n\n captionStream.on('data', function (event) {\n // Convert to seconds in the source's timescale\n event.startTime = event.startPts / timescale;\n event.endTime = event.endPts / timescale;\n parsedCaptions.captions.push(event);\n parsedCaptions.captionStreams[event.stream] = true;\n });\n captionStream.on('log', function (log) {\n parsedCaptions.logs.push(log);\n });\n };\n /**\n * Determines if a new video track will be selected\n * or if the timescale changed\n * @return {Boolean}\n **/\n\n this.isNewInit = function (videoTrackIds, timescales) {\n if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {\n return false;\n }\n return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];\n };\n /**\n * Parses out SEI captions and interacts with underlying\n * CaptionStream to return dispatched captions\n *\n * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment\n * @param {Object.<Number, Number>} timescales - The timescales found in the init segment\n * @see parseEmbeddedCaptions\n * @see m2ts/caption-stream.js\n **/\n\n this.parse = function (segment, videoTrackIds, timescales) {\n var parsedData;\n if (!this.isInitialized()) {\n return null; // This is not likely to be a video segment\n } else if (!videoTrackIds || !timescales) {\n return null;\n } else if (this.isNewInit(videoTrackIds, timescales)) {\n // Use the first video track only as there is no\n // mechanism to switch to other video tracks\n trackId = videoTrackIds[0];\n timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment\n // data until we have one.\n // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n } else if (trackId === null || !timescale) {\n segmentCache.push(segment);\n return null;\n } // Now that a timescale and trackId is set, parse cached segments\n\n while (segmentCache.length > 0) {\n var cachedSegment = segmentCache.shift();\n this.parse(cachedSegment, videoTrackIds, timescales);\n }\n parsedData = parseEmbeddedCaptions(segment, trackId, timescale);\n if (parsedData && parsedData.logs) {\n parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);\n }\n if (parsedData === null || !parsedData.seiNals) {\n if (parsedCaptions.logs.length) {\n return {\n logs: parsedCaptions.logs,\n captions: [],\n captionStreams: []\n };\n }\n return null;\n }\n this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched\n\n this.flushStream();\n return parsedCaptions;\n };\n /**\n * Pushes SEI NALUs onto CaptionStream\n * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`\n * Assumes that `parseCaptionNals` has been called first\n * @see m2ts/caption-stream.js\n **/\n\n this.pushNals = function (nals) {\n if (!this.isInitialized() || !nals || nals.length === 0) {\n return null;\n }\n nals.forEach(function (nal) {\n captionStream.push(nal);\n });\n };\n /**\n * Flushes underlying CaptionStream to dispatch processed, displayable captions\n * @see m2ts/caption-stream.js\n **/\n\n this.flushStream = function () {\n if (!this.isInitialized()) {\n return null;\n }\n if (!parsingPartial) {\n captionStream.flush();\n } else {\n captionStream.partialFlush();\n }\n };\n /**\n * Reset caption buckets for new data\n **/\n\n this.clearParsedCaptions = function () {\n parsedCaptions.captions = [];\n parsedCaptions.captionStreams = {};\n parsedCaptions.logs = [];\n };\n /**\n * Resets underlying CaptionStream\n * @see m2ts/caption-stream.js\n **/\n\n this.resetCaptionStream = function () {\n if (!this.isInitialized()) {\n return null;\n }\n captionStream.reset();\n };\n /**\n * Convenience method to clear all captions flushed from the\n * CaptionStream and still being parsed\n * @see m2ts/caption-stream.js\n **/\n\n this.clearAllCaptions = function () {\n this.clearParsedCaptions();\n this.resetCaptionStream();\n };\n /**\n * Reset caption parser\n **/\n\n this.reset = function () {\n segmentCache = [];\n trackId = null;\n timescale = null;\n if (!parsedCaptions) {\n parsedCaptions = {\n captions: [],\n // CC1, CC2, CC3, CC4\n captionStreams: {},\n logs: []\n };\n } else {\n this.clearParsedCaptions();\n }\n this.resetCaptionStream();\n };\n this.reset();\n };\n var captionParser = CaptionParser;\n /**\n * Returns the first string in the data array ending with a null char '\\0'\n * @param {UInt8} data\n * @returns the string with the null char\n */\n\n var uint8ToCString$1 = function (data) {\n var index = 0;\n var curChar = String.fromCharCode(data[index]);\n var retString = '';\n while (curChar !== '\\0') {\n retString += curChar;\n index++;\n curChar = String.fromCharCode(data[index]);\n } // Add nullChar\n\n retString += curChar;\n return retString;\n };\n var string = {\n uint8ToCString: uint8ToCString$1\n };\n var uint8ToCString = string.uint8ToCString;\n var getUint64$1 = numbers.getUint64;\n /**\n * Based on: ISO/IEC 23009 Section: 5.10.3.3\n * References:\n * https://dashif-documents.azurewebsites.net/Events/master/event.html#emsg-format\n * https://aomediacodec.github.io/id3-emsg/\n *\n * Takes emsg box data as a uint8 array and returns a emsg box object\n * @param {UInt8Array} boxData data from emsg box\n * @returns A parsed emsg box object\n */\n\n var parseEmsgBox = function (boxData) {\n // version + flags\n var offset = 4;\n var version = boxData[0];\n var scheme_id_uri, value, timescale, presentation_time, presentation_time_delta, event_duration, id, message_data;\n if (version === 0) {\n scheme_id_uri = uint8ToCString(boxData.subarray(offset));\n offset += scheme_id_uri.length;\n value = uint8ToCString(boxData.subarray(offset));\n offset += value.length;\n var dv = new DataView(boxData.buffer);\n timescale = dv.getUint32(offset);\n offset += 4;\n presentation_time_delta = dv.getUint32(offset);\n offset += 4;\n event_duration = dv.getUint32(offset);\n offset += 4;\n id = dv.getUint32(offset);\n offset += 4;\n } else if (version === 1) {\n var dv = new DataView(boxData.buffer);\n timescale = dv.getUint32(offset);\n offset += 4;\n presentation_time = getUint64$1(boxData.subarray(offset));\n offset += 8;\n event_duration = dv.getUint32(offset);\n offset += 4;\n id = dv.getUint32(offset);\n offset += 4;\n scheme_id_uri = uint8ToCString(boxData.subarray(offset));\n offset += scheme_id_uri.length;\n value = uint8ToCString(boxData.subarray(offset));\n offset += value.length;\n }\n message_data = new Uint8Array(boxData.subarray(offset, boxData.byteLength));\n var emsgBox = {\n scheme_id_uri,\n value,\n // if timescale is undefined or 0 set to 1\n timescale: timescale ? timescale : 1,\n presentation_time,\n presentation_time_delta,\n event_duration,\n id,\n message_data\n };\n return isValidEmsgBox(version, emsgBox) ? emsgBox : undefined;\n };\n /**\n * Scales a presentation time or time delta with an offset with a provided timescale\n * @param {number} presentationTime\n * @param {number} timescale\n * @param {number} timeDelta\n * @param {number} offset\n * @returns the scaled time as a number\n */\n\n var scaleTime = function (presentationTime, timescale, timeDelta, offset) {\n return presentationTime || presentationTime === 0 ? presentationTime / timescale : offset + timeDelta / timescale;\n };\n /**\n * Checks the emsg box data for validity based on the version\n * @param {number} version of the emsg box to validate\n * @param {Object} emsg the emsg data to validate\n * @returns if the box is valid as a boolean\n */\n\n var isValidEmsgBox = function (version, emsg) {\n var hasScheme = emsg.scheme_id_uri !== '\\0';\n var isValidV0Box = version === 0 && isDefined(emsg.presentation_time_delta) && hasScheme;\n var isValidV1Box = version === 1 && isDefined(emsg.presentation_time) && hasScheme; // Only valid versions of emsg are 0 and 1\n\n return !(version > 1) && isValidV0Box || isValidV1Box;\n }; // Utility function to check if an object is defined\n\n var isDefined = function (data) {\n return data !== undefined || data !== null;\n };\n var emsg$1 = {\n parseEmsgBox: parseEmsgBox,\n scaleTime: scaleTime\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Utilities to detect basic properties and metadata about MP4s.\n */\n\n var toUnsigned = bin.toUnsigned;\n var toHexString = bin.toHexString;\n var findBox = findBox_1;\n var parseType$1 = parseType_1;\n var emsg = emsg$1;\n var parseTfhd = parseTfhd$2;\n var parseTrun = parseTrun$2;\n var parseTfdt = parseTfdt$2;\n var getUint64 = numbers.getUint64;\n var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader, getEmsgID3;\n var window$1 = window_1;\n var parseId3Frames = parseId3.parseId3Frames;\n /**\n * Parses an MP4 initialization segment and extracts the timescale\n * values for any declared tracks. Timescale values indicate the\n * number of clock ticks per second to assume for time-based values\n * elsewhere in the MP4.\n *\n * To determine the start time of an MP4, you need two pieces of\n * information: the timescale unit and the earliest base media decode\n * time. Multiple timescales can be specified within an MP4 but the\n * base media decode time is always expressed in the timescale from\n * the media header box for the track:\n * ```\n * moov > trak > mdia > mdhd.timescale\n * ```\n * @param init {Uint8Array} the bytes of the init segment\n * @return {object} a hash of track ids to timescale values or null if\n * the init segment is malformed.\n */\n\n timescale = function (init) {\n var result = {},\n traks = findBox(init, ['moov', 'trak']); // mdhd timescale\n\n return traks.reduce(function (result, trak) {\n var tkhd, version, index, id, mdhd;\n tkhd = findBox(trak, ['tkhd'])[0];\n if (!tkhd) {\n return null;\n }\n version = tkhd[0];\n index = version === 0 ? 12 : 20;\n id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);\n mdhd = findBox(trak, ['mdia', 'mdhd'])[0];\n if (!mdhd) {\n return null;\n }\n version = mdhd[0];\n index = version === 0 ? 12 : 20;\n result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n return result;\n }, result);\n };\n /**\n * Determine the base media decode start time, in seconds, for an MP4\n * fragment. If multiple fragments are specified, the earliest time is\n * returned.\n *\n * The base media decode time can be parsed from track fragment\n * metadata:\n * ```\n * moof > traf > tfdt.baseMediaDecodeTime\n * ```\n * It requires the timescale value from the mdhd to interpret.\n *\n * @param timescale {object} a hash of track ids to timescale values.\n * @return {number} the earliest base media decode start time for the\n * fragment, in seconds\n */\n\n startTime = function (timescale, fragment) {\n var trafs; // we need info from two childrend of each track fragment box\n\n trafs = findBox(fragment, ['moof', 'traf']); // determine the start times for each track\n\n var lowestTime = trafs.reduce(function (acc, traf) {\n var tfhd = findBox(traf, ['tfhd'])[0]; // get the track id from the tfhd\n\n var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified\n\n var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt\n\n var tfdt = findBox(traf, ['tfdt'])[0];\n var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);\n var baseTime; // version 1 is 64 bit\n\n if (tfdt[0] === 1) {\n baseTime = getUint64(tfdt.subarray(4, 12));\n } else {\n baseTime = dv.getUint32(4);\n } // convert base time to seconds if it is a valid number.\n\n let seconds;\n if (typeof baseTime === 'bigint') {\n seconds = baseTime / window$1.BigInt(scale);\n } else if (typeof baseTime === 'number' && !isNaN(baseTime)) {\n seconds = baseTime / scale;\n }\n if (seconds < Number.MAX_SAFE_INTEGER) {\n seconds = Number(seconds);\n }\n if (seconds < acc) {\n acc = seconds;\n }\n return acc;\n }, Infinity);\n return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;\n };\n /**\n * Determine the composition start, in seconds, for an MP4\n * fragment.\n *\n * The composition start time of a fragment can be calculated using the base\n * media decode time, composition time offset, and timescale, as follows:\n *\n * compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale\n *\n * All of the aforementioned information is contained within a media fragment's\n * `traf` box, except for timescale info, which comes from the initialization\n * segment, so a track id (also contained within a `traf`) is also necessary to\n * associate it with a timescale\n *\n *\n * @param timescales {object} - a hash of track ids to timescale values.\n * @param fragment {Unit8Array} - the bytes of a media segment\n * @return {number} the composition start time for the fragment, in seconds\n **/\n\n compositionStartTime = function (timescales, fragment) {\n var trafBoxes = findBox(fragment, ['moof', 'traf']);\n var baseMediaDecodeTime = 0;\n var compositionTimeOffset = 0;\n var trackId;\n if (trafBoxes && trafBoxes.length) {\n // The spec states that track run samples contained within a `traf` box are contiguous, but\n // it does not explicitly state whether the `traf` boxes themselves are contiguous.\n // We will assume that they are, so we only need the first to calculate start time.\n var tfhd = findBox(trafBoxes[0], ['tfhd'])[0];\n var trun = findBox(trafBoxes[0], ['trun'])[0];\n var tfdt = findBox(trafBoxes[0], ['tfdt'])[0];\n if (tfhd) {\n var parsedTfhd = parseTfhd(tfhd);\n trackId = parsedTfhd.trackId;\n }\n if (tfdt) {\n var parsedTfdt = parseTfdt(tfdt);\n baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;\n }\n if (trun) {\n var parsedTrun = parseTrun(trun);\n if (parsedTrun.samples && parsedTrun.samples.length) {\n compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;\n }\n }\n } // Get timescale for this specific track. Assume a 90kHz clock if no timescale was\n // specified.\n\n var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds\n\n if (typeof baseMediaDecodeTime === 'bigint') {\n compositionTimeOffset = window$1.BigInt(compositionTimeOffset);\n timescale = window$1.BigInt(timescale);\n }\n var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;\n if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {\n result = Number(result);\n }\n return result;\n };\n /**\n * Find the trackIds of the video tracks in this source.\n * Found by parsing the Handler Reference and Track Header Boxes:\n * moov > trak > mdia > hdlr\n * moov > trak > tkhd\n *\n * @param {Uint8Array} init - The bytes of the init segment for this source\n * @return {Number[]} A list of trackIds\n *\n * @see ISO-BMFF-12/2015, Section 8.4.3\n **/\n\n getVideoTrackIds = function (init) {\n var traks = findBox(init, ['moov', 'trak']);\n var videoTrackIds = [];\n traks.forEach(function (trak) {\n var hdlrs = findBox(trak, ['mdia', 'hdlr']);\n var tkhds = findBox(trak, ['tkhd']);\n hdlrs.forEach(function (hdlr, index) {\n var handlerType = parseType$1(hdlr.subarray(8, 12));\n var tkhd = tkhds[index];\n var view;\n var version;\n var trackId;\n if (handlerType === 'vide') {\n view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n version = view.getUint8(0);\n trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);\n videoTrackIds.push(trackId);\n }\n });\n });\n return videoTrackIds;\n };\n getTimescaleFromMediaHeader = function (mdhd) {\n // mdhd is a FullBox, meaning it will have its own version as the first byte\n var version = mdhd[0];\n var index = version === 0 ? 12 : 20;\n return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n };\n /**\n * Get all the video, audio, and hint tracks from a non fragmented\n * mp4 segment\n */\n\n getTracks = function (init) {\n var traks = findBox(init, ['moov', 'trak']);\n var tracks = [];\n traks.forEach(function (trak) {\n var track = {};\n var tkhd = findBox(trak, ['tkhd'])[0];\n var view, tkhdVersion; // id\n\n if (tkhd) {\n view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n tkhdVersion = view.getUint8(0);\n track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n }\n var hdlr = findBox(trak, ['mdia', 'hdlr'])[0]; // type\n\n if (hdlr) {\n var type = parseType$1(hdlr.subarray(8, 12));\n if (type === 'vide') {\n track.type = 'video';\n } else if (type === 'soun') {\n track.type = 'audio';\n } else {\n track.type = type;\n }\n } // codec\n\n var stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];\n if (stsd) {\n var sampleDescriptions = stsd.subarray(8); // gives the codec type string\n\n track.codec = parseType$1(sampleDescriptions.subarray(4, 8));\n var codecBox = findBox(sampleDescriptions, [track.codec])[0];\n var codecConfig, codecConfigType;\n if (codecBox) {\n // https://tools.ietf.org/html/rfc6381#section-3.3\n if (/^[asm]vc[1-9]$/i.test(track.codec)) {\n // we don't need anything but the \"config\" parameter of the\n // avc1 codecBox\n codecConfig = codecBox.subarray(78);\n codecConfigType = parseType$1(codecConfig.subarray(4, 8));\n if (codecConfigType === 'avcC' && codecConfig.length > 11) {\n track.codec += '.'; // left padded with zeroes for single digit hex\n // profile idc\n\n track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags\n\n track.codec += toHexString(codecConfig[10]); // level idc\n\n track.codec += toHexString(codecConfig[11]);\n } else {\n // TODO: show a warning that we couldn't parse the codec\n // and are using the default\n track.codec = 'avc1.4d400d';\n }\n } else if (/^mp4[a,v]$/i.test(track.codec)) {\n // we do not need anything but the streamDescriptor of the mp4a codecBox\n codecConfig = codecBox.subarray(28);\n codecConfigType = parseType$1(codecConfig.subarray(4, 8));\n if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {\n track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit\n\n track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');\n } else {\n // TODO: show a warning that we couldn't parse the codec\n // and are using the default\n track.codec = 'mp4a.40.2';\n }\n } else {\n // flac, opus, etc\n track.codec = track.codec.toLowerCase();\n }\n }\n }\n var mdhd = findBox(trak, ['mdia', 'mdhd'])[0];\n if (mdhd) {\n track.timescale = getTimescaleFromMediaHeader(mdhd);\n }\n tracks.push(track);\n });\n return tracks;\n };\n /**\n * Returns an array of emsg ID3 data from the provided segmentData.\n * An offset can also be provided as the Latest Arrival Time to calculate\n * the Event Start Time of v0 EMSG boxes.\n * See: https://dashif-documents.azurewebsites.net/Events/master/event.html#Inband-event-timing\n *\n * @param {Uint8Array} segmentData the segment byte array.\n * @param {number} offset the segment start time or Latest Arrival Time,\n * @return {Object[]} an array of ID3 parsed from EMSG boxes\n */\n\n getEmsgID3 = function (segmentData, offset = 0) {\n var emsgBoxes = findBox(segmentData, ['emsg']);\n return emsgBoxes.map(data => {\n var parsedBox = emsg.parseEmsgBox(new Uint8Array(data));\n var parsedId3Frames = parseId3Frames(parsedBox.message_data);\n return {\n cueTime: emsg.scaleTime(parsedBox.presentation_time, parsedBox.timescale, parsedBox.presentation_time_delta, offset),\n duration: emsg.scaleTime(parsedBox.event_duration, parsedBox.timescale),\n frames: parsedId3Frames\n };\n });\n };\n var probe$2 = {\n // export mp4 inspector's findBox and parseType for backwards compatibility\n findBox: findBox,\n parseType: parseType$1,\n timescale: timescale,\n startTime: startTime,\n compositionStartTime: compositionStartTime,\n videoTrackIds: getVideoTrackIds,\n tracks: getTracks,\n getTimescaleFromMediaHeader: getTimescaleFromMediaHeader,\n getEmsgID3: getEmsgID3\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Utilities to detect basic properties and metadata about TS Segments.\n */\n\n var StreamTypes$1 = streamTypes;\n var parsePid = function (packet) {\n var pid = packet[1] & 0x1f;\n pid <<= 8;\n pid |= packet[2];\n return pid;\n };\n var parsePayloadUnitStartIndicator = function (packet) {\n return !!(packet[1] & 0x40);\n };\n var parseAdaptionField = function (packet) {\n var offset = 0; // if an adaption field is present, its length is specified by the\n // fifth byte of the TS packet header. The adaptation field is\n // used to add stuffing to PES packets that don't fill a complete\n // TS packet, and to specify some forms of timing and control data\n // that we do not currently use.\n\n if ((packet[3] & 0x30) >>> 4 > 0x01) {\n offset += packet[4] + 1;\n }\n return offset;\n };\n var parseType = function (packet, pmtPid) {\n var pid = parsePid(packet);\n if (pid === 0) {\n return 'pat';\n } else if (pid === pmtPid) {\n return 'pmt';\n } else if (pmtPid) {\n return 'pes';\n }\n return null;\n };\n var parsePat = function (packet) {\n var pusi = parsePayloadUnitStartIndicator(packet);\n var offset = 4 + parseAdaptionField(packet);\n if (pusi) {\n offset += packet[offset] + 1;\n }\n return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n };\n var parsePmt = function (packet) {\n var programMapTable = {};\n var pusi = parsePayloadUnitStartIndicator(packet);\n var payloadOffset = 4 + parseAdaptionField(packet);\n if (pusi) {\n payloadOffset += packet[payloadOffset] + 1;\n } // PMTs can be sent ahead of the time when they should actually\n // take effect. We don't believe this should ever be the case\n // for HLS but we'll ignore \"forward\" PMT declarations if we see\n // them. Future PMT declarations have the current_next_indicator\n // set to zero.\n\n if (!(packet[payloadOffset + 5] & 0x01)) {\n return;\n }\n var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section\n\n sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n // long the program info descriptors are\n\n programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table\n\n var offset = 12 + programInfoLength;\n while (offset < tableEnd) {\n var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type\n\n programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry\n // skip past the elementary stream descriptors, if present\n\n offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n }\n return programMapTable;\n };\n var parsePesType = function (packet, programMapTable) {\n var pid = parsePid(packet);\n var type = programMapTable[pid];\n switch (type) {\n case StreamTypes$1.H264_STREAM_TYPE:\n return 'video';\n case StreamTypes$1.ADTS_STREAM_TYPE:\n return 'audio';\n case StreamTypes$1.METADATA_STREAM_TYPE:\n return 'timed-metadata';\n default:\n return null;\n }\n };\n var parsePesTime = function (packet) {\n var pusi = parsePayloadUnitStartIndicator(packet);\n if (!pusi) {\n return null;\n }\n var offset = 4 + parseAdaptionField(packet);\n if (offset >= packet.byteLength) {\n // From the H 222.0 MPEG-TS spec\n // \"For transport stream packets carrying PES packets, stuffing is needed when there\n // is insufficient PES packet data to completely fill the transport stream packet\n // payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n // the sum of the lengths of the data elements in it, so that the payload bytes\n // remaining after the adaptation field exactly accommodates the available PES packet\n // data.\"\n //\n // If the offset is >= the length of the packet, then the packet contains no data\n // and instead is just adaption field stuffing bytes\n return null;\n }\n var pes = null;\n var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value\n // and a DTS value. Determine what combination of values is\n // available to work with.\n\n ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number. Javascript\n // performs all bitwise operations on 32-bit integers but javascript\n // supports a much greater range (52-bits) of integer using standard\n // mathematical operations.\n // We construct a 31-bit value using bitwise operators over the 31\n // most significant bits and then multiply by 4 (equal to a left-shift\n // of 2) before we add the final 2 least significant bits of the\n // timestamp (equal to an OR.)\n\n if (ptsDtsFlags & 0xC0) {\n pes = {}; // the PTS and DTS are not written out directly. For information\n // on how they are encoded, see\n // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n\n pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;\n pes.pts *= 4; // Left shift by 2\n\n pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n\n pes.dts = pes.pts;\n if (ptsDtsFlags & 0x40) {\n pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;\n pes.dts *= 4; // Left shift by 2\n\n pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n }\n }\n\n return pes;\n };\n var parseNalUnitType = function (type) {\n switch (type) {\n case 0x05:\n return 'slice_layer_without_partitioning_rbsp_idr';\n case 0x06:\n return 'sei_rbsp';\n case 0x07:\n return 'seq_parameter_set_rbsp';\n case 0x08:\n return 'pic_parameter_set_rbsp';\n case 0x09:\n return 'access_unit_delimiter_rbsp';\n default:\n return null;\n }\n };\n var videoPacketContainsKeyFrame = function (packet) {\n var offset = 4 + parseAdaptionField(packet);\n var frameBuffer = packet.subarray(offset);\n var frameI = 0;\n var frameSyncPoint = 0;\n var foundKeyFrame = false;\n var nalType; // advance the sync point to a NAL start, if necessary\n\n for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n if (frameBuffer[frameSyncPoint + 2] === 1) {\n // the sync point is properly aligned\n frameI = frameSyncPoint + 5;\n break;\n }\n }\n while (frameI < frameBuffer.byteLength) {\n // look at the current byte to determine if we've hit the end of\n // a NAL unit boundary\n switch (frameBuffer[frameI]) {\n case 0:\n // skip past non-sync sequences\n if (frameBuffer[frameI - 1] !== 0) {\n frameI += 2;\n break;\n } else if (frameBuffer[frameI - 2] !== 0) {\n frameI++;\n break;\n }\n if (frameSyncPoint + 3 !== frameI - 2) {\n nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n foundKeyFrame = true;\n }\n } // drop trailing zeroes\n\n do {\n frameI++;\n } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n frameSyncPoint = frameI - 2;\n frameI += 3;\n break;\n case 1:\n // skip past non-sync sequences\n if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {\n frameI += 3;\n break;\n }\n nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n foundKeyFrame = true;\n }\n frameSyncPoint = frameI - 2;\n frameI += 3;\n break;\n default:\n // the current byte isn't a one or zero, so it cannot be part\n // of a sync sequence\n frameI += 3;\n break;\n }\n }\n frameBuffer = frameBuffer.subarray(frameSyncPoint);\n frameI -= frameSyncPoint;\n frameSyncPoint = 0; // parse the final nal\n\n if (frameBuffer && frameBuffer.byteLength > 3) {\n nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n foundKeyFrame = true;\n }\n }\n return foundKeyFrame;\n };\n var probe$1 = {\n parseType: parseType,\n parsePat: parsePat,\n parsePmt: parsePmt,\n parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n parsePesType: parsePesType,\n parsePesTime: parsePesTime,\n videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n };\n /**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Parse mpeg2 transport stream packets to extract basic timing information\n */\n\n var StreamTypes = streamTypes;\n var handleRollover = timestampRolloverStream.handleRollover;\n var probe = {};\n probe.ts = probe$1;\n probe.aac = utils;\n var ONE_SECOND_IN_TS = clock$2.ONE_SECOND_IN_TS;\n var MP2T_PACKET_LENGTH = 188,\n // bytes\n SYNC_BYTE = 0x47;\n /**\n * walks through segment data looking for pat and pmt packets to parse out\n * program map table information\n */\n\n var parsePsi_ = function (bytes, pmt) {\n var startIndex = 0,\n endIndex = MP2T_PACKET_LENGTH,\n packet,\n type;\n while (endIndex < bytes.byteLength) {\n // Look for a pair of start and end sync bytes in the data..\n if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n // We found a packet\n packet = bytes.subarray(startIndex, endIndex);\n type = probe.ts.parseType(packet, pmt.pid);\n switch (type) {\n case 'pat':\n pmt.pid = probe.ts.parsePat(packet);\n break;\n case 'pmt':\n var table = probe.ts.parsePmt(packet);\n pmt.table = pmt.table || {};\n Object.keys(table).forEach(function (key) {\n pmt.table[key] = table[key];\n });\n break;\n }\n startIndex += MP2T_PACKET_LENGTH;\n endIndex += MP2T_PACKET_LENGTH;\n continue;\n } // If we get here, we have somehow become de-synchronized and we need to step\n // forward one byte at a time until we find a pair of sync bytes that denote\n // a packet\n\n startIndex++;\n endIndex++;\n }\n };\n /**\n * walks through the segment data from the start and end to get timing information\n * for the first and last audio pes packets\n */\n\n var parseAudioPes_ = function (bytes, pmt, result) {\n var startIndex = 0,\n endIndex = MP2T_PACKET_LENGTH,\n packet,\n type,\n pesType,\n pusi,\n parsed;\n var endLoop = false; // Start walking from start of segment to get first audio packet\n\n while (endIndex <= bytes.byteLength) {\n // Look for a pair of start and end sync bytes in the data..\n if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n // We found a packet\n packet = bytes.subarray(startIndex, endIndex);\n type = probe.ts.parseType(packet, pmt.pid);\n switch (type) {\n case 'pes':\n pesType = probe.ts.parsePesType(packet, pmt.table);\n pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n if (pesType === 'audio' && pusi) {\n parsed = probe.ts.parsePesTime(packet);\n if (parsed) {\n parsed.type = 'audio';\n result.audio.push(parsed);\n endLoop = true;\n }\n }\n break;\n }\n if (endLoop) {\n break;\n }\n startIndex += MP2T_PACKET_LENGTH;\n endIndex += MP2T_PACKET_LENGTH;\n continue;\n } // If we get here, we have somehow become de-synchronized and we need to step\n // forward one byte at a time until we find a pair of sync bytes that denote\n // a packet\n\n startIndex++;\n endIndex++;\n } // Start walking from end of segment to get last audio packet\n\n endIndex = bytes.byteLength;\n startIndex = endIndex - MP2T_PACKET_LENGTH;\n endLoop = false;\n while (startIndex >= 0) {\n // Look for a pair of start and end sync bytes in the data..\n if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n // We found a packet\n packet = bytes.subarray(startIndex, endIndex);\n type = probe.ts.parseType(packet, pmt.pid);\n switch (type) {\n case 'pes':\n pesType = probe.ts.parsePesType(packet, pmt.table);\n pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n if (pesType === 'audio' && pusi) {\n parsed = probe.ts.parsePesTime(packet);\n if (parsed) {\n parsed.type = 'audio';\n result.audio.push(parsed);\n endLoop = true;\n }\n }\n break;\n }\n if (endLoop) {\n break;\n }\n startIndex -= MP2T_PACKET_LENGTH;\n endIndex -= MP2T_PACKET_LENGTH;\n continue;\n } // If we get here, we have somehow become de-synchronized and we need to step\n // forward one byte at a time until we find a pair of sync bytes that denote\n // a packet\n\n startIndex--;\n endIndex--;\n }\n };\n /**\n * walks through the segment data from the start and end to get timing information\n * for the first and last video pes packets as well as timing information for the first\n * key frame.\n */\n\n var parseVideoPes_ = function (bytes, pmt, result) {\n var startIndex = 0,\n endIndex = MP2T_PACKET_LENGTH,\n packet,\n type,\n pesType,\n pusi,\n parsed,\n frame,\n i,\n pes;\n var endLoop = false;\n var currentFrame = {\n data: [],\n size: 0\n }; // Start walking from start of segment to get first video packet\n\n while (endIndex < bytes.byteLength) {\n // Look for a pair of start and end sync bytes in the data..\n if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n // We found a packet\n packet = bytes.subarray(startIndex, endIndex);\n type = probe.ts.parseType(packet, pmt.pid);\n switch (type) {\n case 'pes':\n pesType = probe.ts.parsePesType(packet, pmt.table);\n pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n if (pesType === 'video') {\n if (pusi && !endLoop) {\n parsed = probe.ts.parsePesTime(packet);\n if (parsed) {\n parsed.type = 'video';\n result.video.push(parsed);\n endLoop = true;\n }\n }\n if (!result.firstKeyFrame) {\n if (pusi) {\n if (currentFrame.size !== 0) {\n frame = new Uint8Array(currentFrame.size);\n i = 0;\n while (currentFrame.data.length) {\n pes = currentFrame.data.shift();\n frame.set(pes, i);\n i += pes.byteLength;\n }\n if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting\n // the keyframe seems to work fine with HLS playback\n // and definitely preferable to a crash with TypeError...\n\n if (firstKeyFrame) {\n result.firstKeyFrame = firstKeyFrame;\n result.firstKeyFrame.type = 'video';\n } else {\n // eslint-disable-next-line\n console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');\n }\n }\n currentFrame.size = 0;\n }\n }\n currentFrame.data.push(packet);\n currentFrame.size += packet.byteLength;\n }\n }\n break;\n }\n if (endLoop && result.firstKeyFrame) {\n break;\n }\n startIndex += MP2T_PACKET_LENGTH;\n endIndex += MP2T_PACKET_LENGTH;\n continue;\n } // If we get here, we have somehow become de-synchronized and we need to step\n // forward one byte at a time until we find a pair of sync bytes that denote\n // a packet\n\n startIndex++;\n endIndex++;\n } // Start walking from end of segment to get last video packet\n\n endIndex = bytes.byteLength;\n startIndex = endIndex - MP2T_PACKET_LENGTH;\n endLoop = false;\n while (startIndex >= 0) {\n // Look for a pair of start and end sync bytes in the data..\n if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n // We found a packet\n packet = bytes.subarray(startIndex, endIndex);\n type = probe.ts.parseType(packet, pmt.pid);\n switch (type) {\n case 'pes':\n pesType = probe.ts.parsePesType(packet, pmt.table);\n pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n if (pesType === 'video' && pusi) {\n parsed = probe.ts.parsePesTime(packet);\n if (parsed) {\n parsed.type = 'video';\n result.video.push(parsed);\n endLoop = true;\n }\n }\n break;\n }\n if (endLoop) {\n break;\n }\n startIndex -= MP2T_PACKET_LENGTH;\n endIndex -= MP2T_PACKET_LENGTH;\n continue;\n } // If we get here, we have somehow become de-synchronized and we need to step\n // forward one byte at a time until we find a pair of sync bytes that denote\n // a packet\n\n startIndex--;\n endIndex--;\n }\n };\n /**\n * Adjusts the timestamp information for the segment to account for\n * rollover and convert to seconds based on pes packet timescale (90khz clock)\n */\n\n var adjustTimestamp_ = function (segmentInfo, baseTimestamp) {\n if (segmentInfo.audio && segmentInfo.audio.length) {\n var audioBaseTimestamp = baseTimestamp;\n if (typeof audioBaseTimestamp === 'undefined' || isNaN(audioBaseTimestamp)) {\n audioBaseTimestamp = segmentInfo.audio[0].dts;\n }\n segmentInfo.audio.forEach(function (info) {\n info.dts = handleRollover(info.dts, audioBaseTimestamp);\n info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds\n\n info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n });\n }\n if (segmentInfo.video && segmentInfo.video.length) {\n var videoBaseTimestamp = baseTimestamp;\n if (typeof videoBaseTimestamp === 'undefined' || isNaN(videoBaseTimestamp)) {\n videoBaseTimestamp = segmentInfo.video[0].dts;\n }\n segmentInfo.video.forEach(function (info) {\n info.dts = handleRollover(info.dts, videoBaseTimestamp);\n info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds\n\n info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n });\n if (segmentInfo.firstKeyFrame) {\n var frame = segmentInfo.firstKeyFrame;\n frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds\n\n frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;\n frame.ptsTime = frame.pts / ONE_SECOND_IN_TS;\n }\n }\n };\n /**\n * inspects the aac data stream for start and end time information\n */\n\n var inspectAac_ = function (bytes) {\n var endLoop = false,\n audioCount = 0,\n sampleRate = null,\n timestamp = null,\n frameSize = 0,\n byteIndex = 0,\n packet;\n while (bytes.length - byteIndex >= 3) {\n var type = probe.aac.parseType(bytes, byteIndex);\n switch (type) {\n case 'timed-metadata':\n // Exit early because we don't have enough to parse\n // the ID3 tag header\n if (bytes.length - byteIndex < 10) {\n endLoop = true;\n break;\n }\n frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n // to emit a full packet\n\n if (frameSize > bytes.length) {\n endLoop = true;\n break;\n }\n if (timestamp === null) {\n packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n timestamp = probe.aac.parseAacTimestamp(packet);\n }\n byteIndex += frameSize;\n break;\n case 'audio':\n // Exit early because we don't have enough to parse\n // the ADTS frame header\n if (bytes.length - byteIndex < 7) {\n endLoop = true;\n break;\n }\n frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n // to emit a full packet\n\n if (frameSize > bytes.length) {\n endLoop = true;\n break;\n }\n if (sampleRate === null) {\n packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n sampleRate = probe.aac.parseSampleRate(packet);\n }\n audioCount++;\n byteIndex += frameSize;\n break;\n default:\n byteIndex++;\n break;\n }\n if (endLoop) {\n return null;\n }\n }\n if (sampleRate === null || timestamp === null) {\n return null;\n }\n var audioTimescale = ONE_SECOND_IN_TS / sampleRate;\n var result = {\n audio: [{\n type: 'audio',\n dts: timestamp,\n pts: timestamp\n }, {\n type: 'audio',\n dts: timestamp + audioCount * 1024 * audioTimescale,\n pts: timestamp + audioCount * 1024 * audioTimescale\n }]\n };\n return result;\n };\n /**\n * inspects the transport stream segment data for start and end time information\n * of the audio and video tracks (when present) as well as the first key frame's\n * start time.\n */\n\n var inspectTs_ = function (bytes) {\n var pmt = {\n pid: null,\n table: null\n };\n var result = {};\n parsePsi_(bytes, pmt);\n for (var pid in pmt.table) {\n if (pmt.table.hasOwnProperty(pid)) {\n var type = pmt.table[pid];\n switch (type) {\n case StreamTypes.H264_STREAM_TYPE:\n result.video = [];\n parseVideoPes_(bytes, pmt, result);\n if (result.video.length === 0) {\n delete result.video;\n }\n break;\n case StreamTypes.ADTS_STREAM_TYPE:\n result.audio = [];\n parseAudioPes_(bytes, pmt, result);\n if (result.audio.length === 0) {\n delete result.audio;\n }\n break;\n }\n }\n }\n return result;\n };\n /**\n * Inspects segment byte data and returns an object with start and end timing information\n *\n * @param {Uint8Array} bytes The segment byte data\n * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n * timestamps for rollover. This value must be in 90khz clock.\n * @return {Object} Object containing start and end frame timing info of segment.\n */\n\n var inspect = function (bytes, baseTimestamp) {\n var isAacData = probe.aac.isLikelyAacData(bytes);\n var result;\n if (isAacData) {\n result = inspectAac_(bytes);\n } else {\n result = inspectTs_(bytes);\n }\n if (!result || !result.audio && !result.video) {\n return null;\n }\n adjustTimestamp_(result, baseTimestamp);\n return result;\n };\n var tsInspector = {\n inspect: inspect,\n parseAudioPes_: parseAudioPes_\n };\n /* global self */\n\n /**\n * Re-emits transmuxer events by converting them into messages to the\n * world outside the worker.\n *\n * @param {Object} transmuxer the transmuxer to wire events on\n * @private\n */\n\n const wireTransmuxerEvents = function (self, transmuxer) {\n transmuxer.on('data', function (segment) {\n // transfer ownership of the underlying ArrayBuffer\n // instead of doing a copy to save memory\n // ArrayBuffers are transferable but generic TypedArrays are not\n // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n const initArray = segment.initSegment;\n segment.initSegment = {\n data: initArray.buffer,\n byteOffset: initArray.byteOffset,\n byteLength: initArray.byteLength\n };\n const typedArray = segment.data;\n segment.data = typedArray.buffer;\n self.postMessage({\n action: 'data',\n segment,\n byteOffset: typedArray.byteOffset,\n byteLength: typedArray.byteLength\n }, [segment.data]);\n });\n transmuxer.on('done', function (data) {\n self.postMessage({\n action: 'done'\n });\n });\n transmuxer.on('gopInfo', function (gopInfo) {\n self.postMessage({\n action: 'gopInfo',\n gopInfo\n });\n });\n transmuxer.on('videoSegmentTimingInfo', function (timingInfo) {\n const videoSegmentTimingInfo = {\n start: {\n decode: clock$2.videoTsToSeconds(timingInfo.start.dts),\n presentation: clock$2.videoTsToSeconds(timingInfo.start.pts)\n },\n end: {\n decode: clock$2.videoTsToSeconds(timingInfo.end.dts),\n presentation: clock$2.videoTsToSeconds(timingInfo.end.pts)\n },\n baseMediaDecodeTime: clock$2.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n };\n if (timingInfo.prependedContentDuration) {\n videoSegmentTimingInfo.prependedContentDuration = clock$2.videoTsToSeconds(timingInfo.prependedContentDuration);\n }\n self.postMessage({\n action: 'videoSegmentTimingInfo',\n videoSegmentTimingInfo\n });\n });\n transmuxer.on('audioSegmentTimingInfo', function (timingInfo) {\n // Note that all times for [audio/video]SegmentTimingInfo events are in video clock\n const audioSegmentTimingInfo = {\n start: {\n decode: clock$2.videoTsToSeconds(timingInfo.start.dts),\n presentation: clock$2.videoTsToSeconds(timingInfo.start.pts)\n },\n end: {\n decode: clock$2.videoTsToSeconds(timingInfo.end.dts),\n presentation: clock$2.videoTsToSeconds(timingInfo.end.pts)\n },\n baseMediaDecodeTime: clock$2.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n };\n if (timingInfo.prependedContentDuration) {\n audioSegmentTimingInfo.prependedContentDuration = clock$2.videoTsToSeconds(timingInfo.prependedContentDuration);\n }\n self.postMessage({\n action: 'audioSegmentTimingInfo',\n audioSegmentTimingInfo\n });\n });\n transmuxer.on('id3Frame', function (id3Frame) {\n self.postMessage({\n action: 'id3Frame',\n id3Frame\n });\n });\n transmuxer.on('caption', function (caption) {\n self.postMessage({\n action: 'caption',\n caption\n });\n });\n transmuxer.on('trackinfo', function (trackInfo) {\n self.postMessage({\n action: 'trackinfo',\n trackInfo\n });\n });\n transmuxer.on('audioTimingInfo', function (audioTimingInfo) {\n // convert to video TS since we prioritize video time over audio\n self.postMessage({\n action: 'audioTimingInfo',\n audioTimingInfo: {\n start: clock$2.videoTsToSeconds(audioTimingInfo.start),\n end: clock$2.videoTsToSeconds(audioTimingInfo.end)\n }\n });\n });\n transmuxer.on('videoTimingInfo', function (videoTimingInfo) {\n self.postMessage({\n action: 'videoTimingInfo',\n videoTimingInfo: {\n start: clock$2.videoTsToSeconds(videoTimingInfo.start),\n end: clock$2.videoTsToSeconds(videoTimingInfo.end)\n }\n });\n });\n transmuxer.on('log', function (log) {\n self.postMessage({\n action: 'log',\n log\n });\n });\n };\n /**\n * All incoming messages route through this hash. If no function exists\n * to handle an incoming message, then we ignore the message.\n *\n * @class MessageHandlers\n * @param {Object} options the options to initialize with\n */\n\n class MessageHandlers {\n constructor(self, options) {\n this.options = options || {};\n this.self = self;\n this.init();\n }\n /**\n * initialize our web worker and wire all the events.\n */\n\n init() {\n if (this.transmuxer) {\n this.transmuxer.dispose();\n }\n this.transmuxer = new transmuxer.Transmuxer(this.options);\n wireTransmuxerEvents(this.self, this.transmuxer);\n }\n pushMp4Captions(data) {\n if (!this.captionParser) {\n this.captionParser = new captionParser();\n this.captionParser.init();\n }\n const segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n const parsed = this.captionParser.parse(segment, data.trackIds, data.timescales);\n this.self.postMessage({\n action: 'mp4Captions',\n captions: parsed && parsed.captions || [],\n logs: parsed && parsed.logs || [],\n data: segment.buffer\n }, [segment.buffer]);\n }\n probeMp4StartTime({\n timescales,\n data\n }) {\n const startTime = probe$2.startTime(timescales, data);\n this.self.postMessage({\n action: 'probeMp4StartTime',\n startTime,\n data\n }, [data.buffer]);\n }\n probeMp4Tracks({\n data\n }) {\n const tracks = probe$2.tracks(data);\n this.self.postMessage({\n action: 'probeMp4Tracks',\n tracks,\n data\n }, [data.buffer]);\n }\n /**\n * Probe an mpeg2-ts segment to determine the start time of the segment in it's\n * internal \"media time,\" as well as whether it contains video and/or audio.\n *\n * @private\n * @param {Uint8Array} bytes - segment bytes\n * @param {number} baseStartTime\n * Relative reference timestamp used when adjusting frame timestamps for rollover.\n * This value should be in seconds, as it's converted to a 90khz clock within the\n * function body.\n * @return {Object} The start time of the current segment in \"media time\" as well as\n * whether it contains video and/or audio\n */\n\n probeTs({\n data,\n baseStartTime\n }) {\n const tsStartTime = typeof baseStartTime === 'number' && !isNaN(baseStartTime) ? baseStartTime * clock$2.ONE_SECOND_IN_TS : void 0;\n const timeInfo = tsInspector.inspect(data, tsStartTime);\n let result = null;\n if (timeInfo) {\n result = {\n // each type's time info comes back as an array of 2 times, start and end\n hasVideo: timeInfo.video && timeInfo.video.length === 2 || false,\n hasAudio: timeInfo.audio && timeInfo.audio.length === 2 || false\n };\n if (result.hasVideo) {\n result.videoStart = timeInfo.video[0].ptsTime;\n }\n if (result.hasAudio) {\n result.audioStart = timeInfo.audio[0].ptsTime;\n }\n }\n this.self.postMessage({\n action: 'probeTs',\n result,\n data\n }, [data.buffer]);\n }\n clearAllMp4Captions() {\n if (this.captionParser) {\n this.captionParser.clearAllCaptions();\n }\n }\n clearParsedMp4Captions() {\n if (this.captionParser) {\n this.captionParser.clearParsedCaptions();\n }\n }\n /**\n * Adds data (a ts segment) to the start of the transmuxer pipeline for\n * processing.\n *\n * @param {ArrayBuffer} data data to push into the muxer\n */\n\n push(data) {\n // Cast array buffer to correct type for transmuxer\n const segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n this.transmuxer.push(segment);\n }\n /**\n * Recreate the transmuxer so that the next segment added via `push`\n * start with a fresh transmuxer.\n */\n\n reset() {\n this.transmuxer.reset();\n }\n /**\n * Set the value that will be used as the `baseMediaDecodeTime` time for the\n * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n * set relative to the first based on the PTS values.\n *\n * @param {Object} data used to set the timestamp offset in the muxer\n */\n\n setTimestampOffset(data) {\n const timestampOffset = data.timestampOffset || 0;\n this.transmuxer.setBaseMediaDecodeTime(Math.round(clock$2.secondsToVideoTs(timestampOffset)));\n }\n setAudioAppendStart(data) {\n this.transmuxer.setAudioAppendStart(Math.ceil(clock$2.secondsToVideoTs(data.appendStart)));\n }\n setRemux(data) {\n this.transmuxer.setRemux(data.remux);\n }\n /**\n * Forces the pipeline to finish processing the last segment and emit it's\n * results.\n *\n * @param {Object} data event data, not really used\n */\n\n flush(data) {\n this.transmuxer.flush(); // transmuxed done action is fired after both audio/video pipelines are flushed\n\n self.postMessage({\n action: 'done',\n type: 'transmuxed'\n });\n }\n endTimeline() {\n this.transmuxer.endTimeline(); // transmuxed endedtimeline action is fired after both audio/video pipelines end their\n // timelines\n\n self.postMessage({\n action: 'endedtimeline',\n type: 'transmuxed'\n });\n }\n alignGopsWith(data) {\n this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n }\n }\n /**\n * Our web worker interface so that things can talk to mux.js\n * that will be running in a web worker. the scope is passed to this by\n * webworkify.\n *\n * @param {Object} self the scope for the web worker\n */\n\n self.onmessage = function (event) {\n if (event.data.action === 'init' && event.data.options) {\n this.messageHandlers = new MessageHandlers(self, event.data.options);\n return;\n }\n if (!this.messageHandlers) {\n this.messageHandlers = new MessageHandlers(self);\n }\n if (event.data && event.data.action && event.data.action !== 'init') {\n if (this.messageHandlers[event.data.action]) {\n this.messageHandlers[event.data.action](event.data);\n }\n }\n };\n }));\n var TransmuxWorker = factory(workerCode$1);\n /* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n\n const handleData_ = (event, transmuxedData, callback) => {\n const {\n type,\n initSegment,\n captions,\n captionStreams,\n metadata,\n videoFrameDtsTime,\n videoFramePtsTime\n } = event.data.segment;\n transmuxedData.buffer.push({\n captions,\n captionStreams,\n metadata\n });\n const boxes = event.data.segment.boxes || {\n data: event.data.segment.data\n };\n const result = {\n type,\n // cast ArrayBuffer to TypedArray\n data: new Uint8Array(boxes.data, boxes.data.byteOffset, boxes.data.byteLength),\n initSegment: new Uint8Array(initSegment.data, initSegment.byteOffset, initSegment.byteLength)\n };\n if (typeof videoFrameDtsTime !== 'undefined') {\n result.videoFrameDtsTime = videoFrameDtsTime;\n }\n if (typeof videoFramePtsTime !== 'undefined') {\n result.videoFramePtsTime = videoFramePtsTime;\n }\n callback(result);\n };\n const handleDone_ = ({\n transmuxedData,\n callback\n }) => {\n // Previously we only returned data on data events,\n // not on done events. Clear out the buffer to keep that consistent.\n transmuxedData.buffer = []; // all buffers should have been flushed from the muxer, so start processing anything we\n // have received\n\n callback(transmuxedData);\n };\n const handleGopInfo_ = (event, transmuxedData) => {\n transmuxedData.gopInfo = event.data.gopInfo;\n };\n const processTransmux = options => {\n const {\n transmuxer,\n bytes,\n audioAppendStart,\n gopsToAlignWith,\n remux,\n onData,\n onTrackInfo,\n onAudioTimingInfo,\n onVideoTimingInfo,\n onVideoSegmentTimingInfo,\n onAudioSegmentTimingInfo,\n onId3,\n onCaptions,\n onDone,\n onEndedTimeline,\n onTransmuxerLog,\n isEndOfTimeline\n } = options;\n const transmuxedData = {\n buffer: []\n };\n let waitForEndedTimelineEvent = isEndOfTimeline;\n const handleMessage = event => {\n if (transmuxer.currentTransmux !== options) {\n // disposed\n return;\n }\n if (event.data.action === 'data') {\n handleData_(event, transmuxedData, onData);\n }\n if (event.data.action === 'trackinfo') {\n onTrackInfo(event.data.trackInfo);\n }\n if (event.data.action === 'gopInfo') {\n handleGopInfo_(event, transmuxedData);\n }\n if (event.data.action === 'audioTimingInfo') {\n onAudioTimingInfo(event.data.audioTimingInfo);\n }\n if (event.data.action === 'videoTimingInfo') {\n onVideoTimingInfo(event.data.videoTimingInfo);\n }\n if (event.data.action === 'videoSegmentTimingInfo') {\n onVideoSegmentTimingInfo(event.data.videoSegmentTimingInfo);\n }\n if (event.data.action === 'audioSegmentTimingInfo') {\n onAudioSegmentTimingInfo(event.data.audioSegmentTimingInfo);\n }\n if (event.data.action === 'id3Frame') {\n onId3([event.data.id3Frame], event.data.id3Frame.dispatchType);\n }\n if (event.data.action === 'caption') {\n onCaptions(event.data.caption);\n }\n if (event.data.action === 'endedtimeline') {\n waitForEndedTimelineEvent = false;\n onEndedTimeline();\n }\n if (event.data.action === 'log') {\n onTransmuxerLog(event.data.log);\n } // wait for the transmuxed event since we may have audio and video\n\n if (event.data.type !== 'transmuxed') {\n return;\n } // If the \"endedtimeline\" event has not yet fired, and this segment represents the end\n // of a timeline, that means there may still be data events before the segment\n // processing can be considerred complete. In that case, the final event should be\n // an \"endedtimeline\" event with the type \"transmuxed.\"\n\n if (waitForEndedTimelineEvent) {\n return;\n }\n transmuxer.onmessage = null;\n handleDone_({\n transmuxedData,\n callback: onDone\n });\n /* eslint-disable no-use-before-define */\n\n dequeue(transmuxer);\n /* eslint-enable */\n };\n\n transmuxer.onmessage = handleMessage;\n if (audioAppendStart) {\n transmuxer.postMessage({\n action: 'setAudioAppendStart',\n appendStart: audioAppendStart\n });\n } // allow empty arrays to be passed to clear out GOPs\n\n if (Array.isArray(gopsToAlignWith)) {\n transmuxer.postMessage({\n action: 'alignGopsWith',\n gopsToAlignWith\n });\n }\n if (typeof remux !== 'undefined') {\n transmuxer.postMessage({\n action: 'setRemux',\n remux\n });\n }\n if (bytes.byteLength) {\n const buffer = bytes instanceof ArrayBuffer ? bytes : bytes.buffer;\n const byteOffset = bytes instanceof ArrayBuffer ? 0 : bytes.byteOffset;\n transmuxer.postMessage({\n action: 'push',\n // Send the typed-array of data as an ArrayBuffer so that\n // it can be sent as a \"Transferable\" and avoid the costly\n // memory copy\n data: buffer,\n // To recreate the original typed-array, we need information\n // about what portion of the ArrayBuffer it was a view into\n byteOffset,\n byteLength: bytes.byteLength\n }, [buffer]);\n }\n if (isEndOfTimeline) {\n transmuxer.postMessage({\n action: 'endTimeline'\n });\n } // even if we didn't push any bytes, we have to make sure we flush in case we reached\n // the end of the segment\n\n transmuxer.postMessage({\n action: 'flush'\n });\n };\n const dequeue = transmuxer => {\n transmuxer.currentTransmux = null;\n if (transmuxer.transmuxQueue.length) {\n transmuxer.currentTransmux = transmuxer.transmuxQueue.shift();\n if (typeof transmuxer.currentTransmux === 'function') {\n transmuxer.currentTransmux();\n } else {\n processTransmux(transmuxer.currentTransmux);\n }\n }\n };\n const processAction = (transmuxer, action) => {\n transmuxer.postMessage({\n action\n });\n dequeue(transmuxer);\n };\n const enqueueAction = (action, transmuxer) => {\n if (!transmuxer.currentTransmux) {\n transmuxer.currentTransmux = action;\n processAction(transmuxer, action);\n return;\n }\n transmuxer.transmuxQueue.push(processAction.bind(null, transmuxer, action));\n };\n const reset = transmuxer => {\n enqueueAction('reset', transmuxer);\n };\n const endTimeline = transmuxer => {\n enqueueAction('endTimeline', transmuxer);\n };\n const transmux = options => {\n if (!options.transmuxer.currentTransmux) {\n options.transmuxer.currentTransmux = options;\n processTransmux(options);\n return;\n }\n options.transmuxer.transmuxQueue.push(options);\n };\n const createTransmuxer = options => {\n const transmuxer = new TransmuxWorker();\n transmuxer.currentTransmux = null;\n transmuxer.transmuxQueue = [];\n const term = transmuxer.terminate;\n transmuxer.terminate = () => {\n transmuxer.currentTransmux = null;\n transmuxer.transmuxQueue.length = 0;\n return term.call(transmuxer);\n };\n transmuxer.postMessage({\n action: 'init',\n options\n });\n return transmuxer;\n };\n var segmentTransmuxer = {\n reset,\n endTimeline,\n transmux,\n createTransmuxer\n };\n const workerCallback = function (options) {\n const transmuxer = options.transmuxer;\n const endAction = options.endAction || options.action;\n const callback = options.callback;\n const message = _extends$1({}, options, {\n endAction: null,\n transmuxer: null,\n callback: null\n });\n const listenForEndEvent = event => {\n if (event.data.action !== endAction) {\n return;\n }\n transmuxer.removeEventListener('message', listenForEndEvent); // transfer ownership of bytes back to us.\n\n if (event.data.data) {\n event.data.data = new Uint8Array(event.data.data, options.byteOffset || 0, options.byteLength || event.data.data.byteLength);\n if (options.data) {\n options.data = event.data.data;\n }\n }\n callback(event.data);\n };\n transmuxer.addEventListener('message', listenForEndEvent);\n if (options.data) {\n const isArrayBuffer = options.data instanceof ArrayBuffer;\n message.byteOffset = isArrayBuffer ? 0 : options.data.byteOffset;\n message.byteLength = options.data.byteLength;\n const transfers = [isArrayBuffer ? options.data : options.data.buffer];\n transmuxer.postMessage(message, transfers);\n } else {\n transmuxer.postMessage(message);\n }\n };\n const REQUEST_ERRORS = {\n FAILURE: 2,\n TIMEOUT: -101,\n ABORTED: -102\n };\n /**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\n\n const abortAll = activeXhrs => {\n activeXhrs.forEach(xhr => {\n xhr.abort();\n });\n };\n /**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\n\n const getRequestStats = request => {\n return {\n bandwidth: request.bandwidth,\n bytesReceived: request.bytesReceived || 0,\n roundTripTime: request.roundTripTime || 0\n };\n };\n /**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\n\n const getProgressStats = progressEvent => {\n const request = progressEvent.target;\n const roundTripTime = Date.now() - request.requestTime;\n const stats = {\n bandwidth: Infinity,\n bytesReceived: 0,\n roundTripTime: roundTripTime || 0\n };\n stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n // because we should only use bandwidth stats on progress to determine when\n // abort a request early due to insufficient bandwidth\n\n stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n return stats;\n };\n /**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request - the XHR request that possibly generated the error\n */\n\n const handleErrors = (error, request) => {\n if (request.timedout) {\n return {\n status: request.status,\n message: 'HLS request timed-out at URL: ' + request.uri,\n code: REQUEST_ERRORS.TIMEOUT,\n xhr: request\n };\n }\n if (request.aborted) {\n return {\n status: request.status,\n message: 'HLS request aborted at URL: ' + request.uri,\n code: REQUEST_ERRORS.ABORTED,\n xhr: request\n };\n }\n if (error) {\n return {\n status: request.status,\n message: 'HLS request errored at URL: ' + request.uri,\n code: REQUEST_ERRORS.FAILURE,\n xhr: request\n };\n }\n if (request.responseType === 'arraybuffer' && request.response.byteLength === 0) {\n return {\n status: request.status,\n message: 'Empty HLS response at URL: ' + request.uri,\n code: REQUEST_ERRORS.FAILURE,\n xhr: request\n };\n }\n return null;\n };\n /**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n * @param {Array} objects - objects to add the key bytes to.\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n * this request\n */\n\n const handleKeyResponse = (segment, objects, finishProcessingFn) => (error, request) => {\n const response = request.response;\n const errorObj = handleErrors(error, request);\n if (errorObj) {\n return finishProcessingFn(errorObj, segment);\n }\n if (response.byteLength !== 16) {\n return finishProcessingFn({\n status: request.status,\n message: 'Invalid HLS key at URL: ' + request.uri,\n code: REQUEST_ERRORS.FAILURE,\n xhr: request\n }, segment);\n }\n const view = new DataView(response);\n const bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n for (let i = 0; i < objects.length; i++) {\n objects[i].bytes = bytes;\n }\n return finishProcessingFn(null, segment);\n };\n const parseInitSegment = (segment, callback) => {\n const type = detectContainerForBytes(segment.map.bytes); // TODO: We should also handle ts init segments here, but we\n // only know how to parse mp4 init segments at the moment\n\n if (type !== 'mp4') {\n const uri = segment.map.resolvedUri || segment.map.uri;\n return callback({\n internal: true,\n message: `Found unsupported ${type || 'unknown'} container for initialization segment at URL: ${uri}`,\n code: REQUEST_ERRORS.FAILURE\n });\n }\n workerCallback({\n action: 'probeMp4Tracks',\n data: segment.map.bytes,\n transmuxer: segment.transmuxer,\n callback: ({\n tracks,\n data\n }) => {\n // transfer bytes back to us\n segment.map.bytes = data;\n tracks.forEach(function (track) {\n segment.map.tracks = segment.map.tracks || {}; // only support one track of each type for now\n\n if (segment.map.tracks[track.type]) {\n return;\n }\n segment.map.tracks[track.type] = track;\n if (typeof track.id === 'number' && track.timescale) {\n segment.map.timescales = segment.map.timescales || {};\n segment.map.timescales[track.id] = track.timescale;\n }\n });\n return callback(null);\n }\n });\n };\n /**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n * this request\n */\n\n const handleInitSegmentResponse = ({\n segment,\n finishProcessingFn\n }) => (error, request) => {\n const errorObj = handleErrors(error, request);\n if (errorObj) {\n return finishProcessingFn(errorObj, segment);\n }\n const bytes = new Uint8Array(request.response); // init segment is encypted, we will have to wait\n // until the key request is done to decrypt.\n\n if (segment.map.key) {\n segment.map.encryptedBytes = bytes;\n return finishProcessingFn(null, segment);\n }\n segment.map.bytes = bytes;\n parseInitSegment(segment, function (parseError) {\n if (parseError) {\n parseError.xhr = request;\n parseError.status = request.status;\n return finishProcessingFn(parseError, segment);\n }\n finishProcessingFn(null, segment);\n });\n };\n /**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n * this request\n */\n\n const handleSegmentResponse = ({\n segment,\n finishProcessingFn,\n responseType\n }) => (error, request) => {\n const errorObj = handleErrors(error, request);\n if (errorObj) {\n return finishProcessingFn(errorObj, segment);\n }\n const newBytes =\n // although responseText \"should\" exist, this guard serves to prevent an error being\n // thrown for two primary cases:\n // 1. the mime type override stops working, or is not implemented for a specific\n // browser\n // 2. when using mock XHR libraries like sinon that do not allow the override behavior\n responseType === 'arraybuffer' || !request.responseText ? request.response : stringToArrayBuffer(request.responseText.substring(segment.lastReachedChar || 0));\n segment.stats = getRequestStats(request);\n if (segment.key) {\n segment.encryptedBytes = new Uint8Array(newBytes);\n } else {\n segment.bytes = new Uint8Array(newBytes);\n }\n return finishProcessingFn(null, segment);\n };\n const transmuxAndNotify = ({\n segment,\n bytes,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n }) => {\n const fmp4Tracks = segment.map && segment.map.tracks || {};\n const isMuxed = Boolean(fmp4Tracks.audio && fmp4Tracks.video); // Keep references to each function so we can null them out after we're done with them.\n // One reason for this is that in the case of full segments, we want to trust start\n // times from the probe, rather than the transmuxer.\n\n let audioStartFn = timingInfoFn.bind(null, segment, 'audio', 'start');\n const audioEndFn = timingInfoFn.bind(null, segment, 'audio', 'end');\n let videoStartFn = timingInfoFn.bind(null, segment, 'video', 'start');\n const videoEndFn = timingInfoFn.bind(null, segment, 'video', 'end');\n const finish = () => transmux({\n bytes,\n transmuxer: segment.transmuxer,\n audioAppendStart: segment.audioAppendStart,\n gopsToAlignWith: segment.gopsToAlignWith,\n remux: isMuxed,\n onData: result => {\n result.type = result.type === 'combined' ? 'video' : result.type;\n dataFn(segment, result);\n },\n onTrackInfo: trackInfo => {\n if (trackInfoFn) {\n if (isMuxed) {\n trackInfo.isMuxed = true;\n }\n trackInfoFn(segment, trackInfo);\n }\n },\n onAudioTimingInfo: audioTimingInfo => {\n // we only want the first start value we encounter\n if (audioStartFn && typeof audioTimingInfo.start !== 'undefined') {\n audioStartFn(audioTimingInfo.start);\n audioStartFn = null;\n } // we want to continually update the end time\n\n if (audioEndFn && typeof audioTimingInfo.end !== 'undefined') {\n audioEndFn(audioTimingInfo.end);\n }\n },\n onVideoTimingInfo: videoTimingInfo => {\n // we only want the first start value we encounter\n if (videoStartFn && typeof videoTimingInfo.start !== 'undefined') {\n videoStartFn(videoTimingInfo.start);\n videoStartFn = null;\n } // we want to continually update the end time\n\n if (videoEndFn && typeof videoTimingInfo.end !== 'undefined') {\n videoEndFn(videoTimingInfo.end);\n }\n },\n onVideoSegmentTimingInfo: videoSegmentTimingInfo => {\n videoSegmentTimingInfoFn(videoSegmentTimingInfo);\n },\n onAudioSegmentTimingInfo: audioSegmentTimingInfo => {\n audioSegmentTimingInfoFn(audioSegmentTimingInfo);\n },\n onId3: (id3Frames, dispatchType) => {\n id3Fn(segment, id3Frames, dispatchType);\n },\n onCaptions: captions => {\n captionsFn(segment, [captions]);\n },\n isEndOfTimeline,\n onEndedTimeline: () => {\n endedTimelineFn();\n },\n onTransmuxerLog,\n onDone: result => {\n if (!doneFn) {\n return;\n }\n result.type = result.type === 'combined' ? 'video' : result.type;\n doneFn(null, segment, result);\n }\n }); // In the transmuxer, we don't yet have the ability to extract a \"proper\" start time.\n // Meaning cached frame data may corrupt our notion of where this segment\n // really starts. To get around this, probe for the info needed.\n\n workerCallback({\n action: 'probeTs',\n transmuxer: segment.transmuxer,\n data: bytes,\n baseStartTime: segment.baseStartTime,\n callback: data => {\n segment.bytes = bytes = data.data;\n const probeResult = data.result;\n if (probeResult) {\n trackInfoFn(segment, {\n hasAudio: probeResult.hasAudio,\n hasVideo: probeResult.hasVideo,\n isMuxed\n });\n trackInfoFn = null;\n if (probeResult.hasAudio && !isMuxed) {\n audioStartFn(probeResult.audioStart);\n }\n if (probeResult.hasVideo) {\n videoStartFn(probeResult.videoStart);\n }\n audioStartFn = null;\n videoStartFn = null;\n }\n finish();\n }\n });\n };\n const handleSegmentBytes = ({\n segment,\n bytes,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n }) => {\n let bytesAsUint8Array = new Uint8Array(bytes); // TODO:\n // We should have a handler that fetches the number of bytes required\n // to check if something is fmp4. This will allow us to save bandwidth\n // because we can only exclude a playlist and abort requests\n // by codec after trackinfo triggers.\n\n if (isLikelyFmp4MediaSegment(bytesAsUint8Array)) {\n segment.isFmp4 = true;\n const {\n tracks\n } = segment.map;\n const trackInfo = {\n isFmp4: true,\n hasVideo: !!tracks.video,\n hasAudio: !!tracks.audio\n }; // if we have a audio track, with a codec that is not set to\n // encrypted audio\n\n if (tracks.audio && tracks.audio.codec && tracks.audio.codec !== 'enca') {\n trackInfo.audioCodec = tracks.audio.codec;\n } // if we have a video track, with a codec that is not set to\n // encrypted video\n\n if (tracks.video && tracks.video.codec && tracks.video.codec !== 'encv') {\n trackInfo.videoCodec = tracks.video.codec;\n }\n if (tracks.video && tracks.audio) {\n trackInfo.isMuxed = true;\n } // since we don't support appending fmp4 data on progress, we know we have the full\n // segment here\n\n trackInfoFn(segment, trackInfo); // The probe doesn't provide the segment end time, so only callback with the start\n // time. The end time can be roughly calculated by the receiver using the duration.\n //\n // Note that the start time returned by the probe reflects the baseMediaDecodeTime, as\n // that is the true start of the segment (where the playback engine should begin\n // decoding).\n\n const finishLoading = captions => {\n // if the track still has audio at this point it is only possible\n // for it to be audio only. See `tracks.video && tracks.audio` if statement\n // above.\n // we make sure to use segment.bytes here as that\n dataFn(segment, {\n data: bytesAsUint8Array,\n type: trackInfo.hasAudio && !trackInfo.isMuxed ? 'audio' : 'video'\n });\n if (captions && captions.length) {\n captionsFn(segment, captions);\n }\n doneFn(null, segment, {});\n };\n workerCallback({\n action: 'probeMp4StartTime',\n timescales: segment.map.timescales,\n data: bytesAsUint8Array,\n transmuxer: segment.transmuxer,\n callback: ({\n data,\n startTime\n }) => {\n // transfer bytes back to us\n bytes = data.buffer;\n segment.bytes = bytesAsUint8Array = data;\n if (trackInfo.hasAudio && !trackInfo.isMuxed) {\n timingInfoFn(segment, 'audio', 'start', startTime);\n }\n if (trackInfo.hasVideo) {\n timingInfoFn(segment, 'video', 'start', startTime);\n } // Run through the CaptionParser in case there are captions.\n // Initialize CaptionParser if it hasn't been yet\n\n if (!tracks.video || !data.byteLength || !segment.transmuxer) {\n finishLoading();\n return;\n }\n workerCallback({\n action: 'pushMp4Captions',\n endAction: 'mp4Captions',\n transmuxer: segment.transmuxer,\n data: bytesAsUint8Array,\n timescales: segment.map.timescales,\n trackIds: [tracks.video.id],\n callback: message => {\n // transfer bytes back to us\n bytes = message.data.buffer;\n segment.bytes = bytesAsUint8Array = message.data;\n message.logs.forEach(function (log) {\n onTransmuxerLog(merge(log, {\n stream: 'mp4CaptionParser'\n }));\n });\n finishLoading(message.captions);\n }\n });\n }\n });\n return;\n } // VTT or other segments that don't need processing\n\n if (!segment.transmuxer) {\n doneFn(null, segment, {});\n return;\n }\n if (typeof segment.container === 'undefined') {\n segment.container = detectContainerForBytes(bytesAsUint8Array);\n }\n if (segment.container !== 'ts' && segment.container !== 'aac') {\n trackInfoFn(segment, {\n hasAudio: false,\n hasVideo: false\n });\n doneFn(null, segment, {});\n return;\n } // ts or aac\n\n transmuxAndNotify({\n segment,\n bytes,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n });\n };\n const decrypt = function ({\n id,\n key,\n encryptedBytes,\n decryptionWorker\n }, callback) {\n const decryptionHandler = event => {\n if (event.data.source === id) {\n decryptionWorker.removeEventListener('message', decryptionHandler);\n const decrypted = event.data.decrypted;\n callback(new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength));\n }\n };\n decryptionWorker.addEventListener('message', decryptionHandler);\n let keyBytes;\n if (key.bytes.slice) {\n keyBytes = key.bytes.slice();\n } else {\n keyBytes = new Uint32Array(Array.prototype.slice.call(key.bytes));\n } // incrementally decrypt the bytes\n\n decryptionWorker.postMessage(createTransferableMessage({\n source: id,\n encrypted: encryptedBytes,\n key: keyBytes,\n iv: key.iv\n }), [encryptedBytes.buffer, keyBytes.buffer]);\n };\n /**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n * routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n * a callback that receives video timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n * a callback that receives audio timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {boolean} isEndOfTimeline\n * true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n * a callback made when a timeline is ended, will only be called if\n * isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n * and ready to use\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\n\n const decryptSegment = ({\n decryptionWorker,\n segment,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n }) => {\n decrypt({\n id: segment.requestId,\n key: segment.key,\n encryptedBytes: segment.encryptedBytes,\n decryptionWorker\n }, decryptedBytes => {\n segment.bytes = decryptedBytes;\n handleSegmentBytes({\n segment,\n bytes: segment.bytes,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n });\n });\n };\n /**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n * routines\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n * a callback that receives video timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n * a callback that receives audio timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean} isEndOfTimeline\n * true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n * a callback made when a timeline is ended, will only be called if\n * isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n * and ready to use\n * @param {Function} doneFn - a callback that is executed after all resources have been\n * downloaded and any decryption completed\n */\n\n const waitForCompletion = ({\n activeXhrs,\n decryptionWorker,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n }) => {\n let count = 0;\n let didError = false;\n return (error, segment) => {\n if (didError) {\n return;\n }\n if (error) {\n didError = true; // If there are errors, we have to abort any outstanding requests\n\n abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we\n // handle the aborted events from those requests, there are some cases where we may\n // never get an aborted event. For instance, if the network connection is lost and\n // there were two requests, the first may have triggered an error immediately, while\n // the second request remains unsent. In that case, the aborted algorithm will not\n // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method\n //\n // We also can't rely on the ready state of the XHR, since the request that\n // triggered the connection error may also show as a ready state of 0 (unsent).\n // Therefore, we have to finish this group of requests immediately after the first\n // seen error.\n\n return doneFn(error, segment);\n }\n count += 1;\n if (count === activeXhrs.length) {\n const segmentFinish = function () {\n if (segment.encryptedBytes) {\n return decryptSegment({\n decryptionWorker,\n segment,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n });\n } // Otherwise, everything is ready just continue\n\n handleSegmentBytes({\n segment,\n bytes: segment.bytes,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n });\n }; // Keep track of when *all* of the requests have completed\n\n segment.endOfAllRequests = Date.now();\n if (segment.map && segment.map.encryptedBytes && !segment.map.bytes) {\n return decrypt({\n decryptionWorker,\n // add -init to the \"id\" to differentiate between segment\n // and init segment decryption, just in case they happen\n // at the same time at some point in the future.\n id: segment.requestId + '-init',\n encryptedBytes: segment.map.encryptedBytes,\n key: segment.map.key\n }, decryptedBytes => {\n segment.map.bytes = decryptedBytes;\n parseInitSegment(segment, parseError => {\n if (parseError) {\n abortAll(activeXhrs);\n return doneFn(parseError, segment);\n }\n segmentFinish();\n });\n });\n }\n segmentFinish();\n }\n };\n };\n /**\n * Calls the abort callback if any request within the batch was aborted. Will only call\n * the callback once per batch of requests, even if multiple were aborted.\n *\n * @param {Object} loadendState - state to check to see if the abort function was called\n * @param {Function} abortFn - callback to call for abort\n */\n\n const handleLoadEnd = ({\n loadendState,\n abortFn\n }) => event => {\n const request = event.target;\n if (request.aborted && abortFn && !loadendState.calledAbortFn) {\n abortFn();\n loadendState.calledAbortFn = true;\n }\n };\n /**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n * is received\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n * a callback that receives video timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n * a callback that receives audio timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {boolean} isEndOfTimeline\n * true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n * a callback made when a timeline is ended, will only be called if\n * isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n * and ready to use\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\n\n const handleProgress = ({\n segment,\n progressFn,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn\n }) => event => {\n const request = event.target;\n if (request.aborted) {\n return;\n }\n segment.stats = merge(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data\n\n if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n segment.stats.firstBytesReceivedAt = Date.now();\n }\n return progressFn(event, segment);\n };\n /**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n * decrypts the media-segment if it has a key uri and an iv\n * aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n * resolvedUri: String,\n * [transmuxer]: Object,\n * [byterange]: {\n * offset: Number,\n * length: Number\n * },\n * [key]: {\n * resolvedUri: String\n * [byterange]: {\n * offset: Number,\n * length: Number\n * },\n * iv: {\n * bytes: Uint32Array\n * }\n * },\n * [map]: {\n * resolvedUri: String,\n * [byterange]: {\n * offset: Number,\n * length: Number\n * },\n * [bytes]: Uint8Array\n * }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n * decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n * from SegmentLoader\n * @param {Function} abortFn - a callback called (only once) if any piece of a request was\n * aborted\n * @param {Function} progressFn - a callback that receives progress events from the main\n * segment's xhr request\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n * a callback that receives video timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n * a callback that receives audio timing info based on media times and\n * any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean} isEndOfTimeline\n * true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n * a callback made when a timeline is ended, will only be called if\n * isEndOfTimeline is true\n * @param {Function} dataFn - a callback that receives data from the main segment's xhr\n * request, transmuxed if needed\n * @param {Function} doneFn - a callback that is executed only once all requests have\n * succeeded or failed\n * @return {Function} a function that, when invoked, immediately aborts all\n * outstanding requests\n */\n\n const mediaSegmentRequest = ({\n xhr,\n xhrOptions,\n decryptionWorker,\n segment,\n abortFn,\n progressFn,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n }) => {\n const activeXhrs = [];\n const finishProcessingFn = waitForCompletion({\n activeXhrs,\n decryptionWorker,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn,\n doneFn,\n onTransmuxerLog\n }); // optionally, request the decryption key\n\n if (segment.key && !segment.key.bytes) {\n const objects = [segment.key];\n if (segment.map && !segment.map.bytes && segment.map.key && segment.map.key.resolvedUri === segment.key.resolvedUri) {\n objects.push(segment.map.key);\n }\n const keyRequestOptions = merge(xhrOptions, {\n uri: segment.key.resolvedUri,\n responseType: 'arraybuffer'\n });\n const keyRequestCallback = handleKeyResponse(segment, objects, finishProcessingFn);\n const keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n activeXhrs.push(keyXhr);\n } // optionally, request the associated media init segment\n\n if (segment.map && !segment.map.bytes) {\n const differentMapKey = segment.map.key && (!segment.key || segment.key.resolvedUri !== segment.map.key.resolvedUri);\n if (differentMapKey) {\n const mapKeyRequestOptions = merge(xhrOptions, {\n uri: segment.map.key.resolvedUri,\n responseType: 'arraybuffer'\n });\n const mapKeyRequestCallback = handleKeyResponse(segment, [segment.map.key], finishProcessingFn);\n const mapKeyXhr = xhr(mapKeyRequestOptions, mapKeyRequestCallback);\n activeXhrs.push(mapKeyXhr);\n }\n const initSegmentOptions = merge(xhrOptions, {\n uri: segment.map.resolvedUri,\n responseType: 'arraybuffer',\n headers: segmentXhrHeaders(segment.map)\n });\n const initSegmentRequestCallback = handleInitSegmentResponse({\n segment,\n finishProcessingFn\n });\n const initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n activeXhrs.push(initSegmentXhr);\n }\n const segmentRequestOptions = merge(xhrOptions, {\n uri: segment.part && segment.part.resolvedUri || segment.resolvedUri,\n responseType: 'arraybuffer',\n headers: segmentXhrHeaders(segment)\n });\n const segmentRequestCallback = handleSegmentResponse({\n segment,\n finishProcessingFn,\n responseType: segmentRequestOptions.responseType\n });\n const segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n segmentXhr.addEventListener('progress', handleProgress({\n segment,\n progressFn,\n trackInfoFn,\n timingInfoFn,\n videoSegmentTimingInfoFn,\n audioSegmentTimingInfoFn,\n id3Fn,\n captionsFn,\n isEndOfTimeline,\n endedTimelineFn,\n dataFn\n }));\n activeXhrs.push(segmentXhr); // since all parts of the request must be considered, but should not make callbacks\n // multiple times, provide a shared state object\n\n const loadendState = {};\n activeXhrs.forEach(activeXhr => {\n activeXhr.addEventListener('loadend', handleLoadEnd({\n loadendState,\n abortFn\n }));\n });\n return () => abortAll(activeXhrs);\n };\n\n /**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\n const logFn$1 = logger('CodecUtils');\n /**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n *\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\n\n const getCodecs = function (media) {\n // if the codecs were explicitly specified, use them instead of the\n // defaults\n const mediaAttributes = media.attributes || {};\n if (mediaAttributes.CODECS) {\n return parseCodecs(mediaAttributes.CODECS);\n }\n };\n const isMaat = (main, media) => {\n const mediaAttributes = media.attributes || {};\n return main && main.mediaGroups && main.mediaGroups.AUDIO && mediaAttributes.AUDIO && main.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n };\n const isMuxed = (main, media) => {\n if (!isMaat(main, media)) {\n return true;\n }\n const mediaAttributes = media.attributes || {};\n const audioGroup = main.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n for (const groupId in audioGroup) {\n // If an audio group has a URI (the case for HLS, as HLS will use external playlists),\n // or there are listed playlists (the case for DASH, as the manifest will have already\n // provided all of the details necessary to generate the audio playlist, as opposed to\n // HLS' externally requested playlists), then the content is demuxed.\n if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {\n return true;\n }\n }\n return false;\n };\n const unwrapCodecList = function (codecList) {\n const codecs = {};\n codecList.forEach(({\n mediaType,\n type,\n details\n }) => {\n codecs[mediaType] = codecs[mediaType] || [];\n codecs[mediaType].push(translateLegacyCodec(`${type}${details}`));\n });\n Object.keys(codecs).forEach(function (mediaType) {\n if (codecs[mediaType].length > 1) {\n logFn$1(`multiple ${mediaType} codecs found as attributes: ${codecs[mediaType].join(', ')}. Setting playlist codecs to null so that we wait for mux.js to probe segments for real codecs.`);\n codecs[mediaType] = null;\n return;\n }\n codecs[mediaType] = codecs[mediaType][0];\n });\n return codecs;\n };\n const codecCount = function (codecObj) {\n let count = 0;\n if (codecObj.audio) {\n count++;\n }\n if (codecObj.video) {\n count++;\n }\n return count;\n };\n /**\n * Calculates the codec strings for a working configuration of\n * SourceBuffers to play variant streams in a main playlist. If\n * there is no possible working configuration, an empty object will be\n * returned.\n *\n * @param main {Object} the m3u8 object for the main playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Object} the codec strings.\n *\n * @private\n */\n\n const codecsForPlaylist = function (main, media) {\n const mediaAttributes = media.attributes || {};\n const codecInfo = unwrapCodecList(getCodecs(media) || []); // HLS with multiple-audio tracks must always get an audio codec.\n // Put another way, there is no way to have a video-only multiple-audio HLS!\n\n if (isMaat(main, media) && !codecInfo.audio) {\n if (!isMuxed(main, media)) {\n // It is possible for codecs to be specified on the audio media group playlist but\n // not on the rendition playlist. This is mostly the case for DASH, where audio and\n // video are always separate (and separately specified).\n const defaultCodecs = unwrapCodecList(codecsFromDefault(main, mediaAttributes.AUDIO) || []);\n if (defaultCodecs.audio) {\n codecInfo.audio = defaultCodecs.audio;\n }\n }\n }\n return codecInfo;\n };\n const logFn = logger('PlaylistSelector');\n const representationToString = function (representation) {\n if (!representation || !representation.playlist) {\n return;\n }\n const playlist = representation.playlist;\n return JSON.stringify({\n id: playlist.id,\n bandwidth: representation.bandwidth,\n width: representation.width,\n height: representation.height,\n codecs: playlist.attributes && playlist.attributes.CODECS || ''\n });\n }; // Utilities\n\n /**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\n\n const safeGetComputedStyle = function (el, property) {\n if (!el) {\n return '';\n }\n const result = window.getComputedStyle(el);\n if (!result) {\n return '';\n }\n return result[property];\n };\n /**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\n\n const stableSort = function (array, sortFn) {\n const newArray = array.slice();\n array.sort(function (left, right) {\n const cmp = sortFn(left, right);\n if (cmp === 0) {\n return newArray.indexOf(left) - newArray.indexOf(right);\n }\n return cmp;\n });\n };\n /**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n const comparePlaylistBandwidth = function (left, right) {\n let leftBandwidth;\n let rightBandwidth;\n if (left.attributes.BANDWIDTH) {\n leftBandwidth = left.attributes.BANDWIDTH;\n }\n leftBandwidth = leftBandwidth || window.Number.MAX_VALUE;\n if (right.attributes.BANDWIDTH) {\n rightBandwidth = right.attributes.BANDWIDTH;\n }\n rightBandwidth = rightBandwidth || window.Number.MAX_VALUE;\n return leftBandwidth - rightBandwidth;\n };\n /**\n * A comparator function to sort two playlist object by resolution (width).\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n const comparePlaylistResolution = function (left, right) {\n let leftWidth;\n let rightWidth;\n if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n leftWidth = left.attributes.RESOLUTION.width;\n }\n leftWidth = leftWidth || window.Number.MAX_VALUE;\n if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n rightWidth = right.attributes.RESOLUTION.width;\n }\n rightWidth = rightWidth || window.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n // have the same media dimensions/ resolution\n\n if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n }\n return leftWidth - rightWidth;\n };\n /**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} main\n * Object representation of the main manifest\n * @param {number} playerBandwidth\n * Current calculated bandwidth of the player\n * @param {number} playerWidth\n * Current width of the player element (should account for the device pixel ratio)\n * @param {number} playerHeight\n * Current height of the player element (should account for the device pixel ratio)\n * @param {boolean} limitRenditionByPlayerDimensions\n * True if the player width and height should be used during the selection, false otherwise\n * @param {Object} playlistController\n * the current playlistController object\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n let simpleSelector = function (main, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions, playlistController) {\n // If we end up getting called before `main` is available, exit early\n if (!main) {\n return;\n }\n const options = {\n bandwidth: playerBandwidth,\n width: playerWidth,\n height: playerHeight,\n limitRenditionByPlayerDimensions\n };\n let playlists = main.playlists; // if playlist is audio only, select between currently active audio group playlists.\n\n if (Playlist.isAudioOnly(main)) {\n playlists = playlistController.getAudioTrackPlaylists_(); // add audioOnly to options so that we log audioOnly: true\n // at the buttom of this function for debugging.\n\n options.audioOnly = true;\n } // convert the playlists to an intermediary representation to make comparisons easier\n\n let sortedPlaylistReps = playlists.map(playlist => {\n let bandwidth;\n const width = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n const height = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n bandwidth = playlist.attributes && playlist.attributes.BANDWIDTH;\n bandwidth = bandwidth || window.Number.MAX_VALUE;\n return {\n bandwidth,\n width,\n height,\n playlist\n };\n });\n stableSort(sortedPlaylistReps, (left, right) => left.bandwidth - right.bandwidth); // filter out any playlists that have been excluded due to\n // incompatible configurations\n\n sortedPlaylistReps = sortedPlaylistReps.filter(rep => !Playlist.isIncompatible(rep.playlist)); // filter out any playlists that have been disabled manually through the representations\n // api or excluded temporarily due to playback errors.\n\n let enabledPlaylistReps = sortedPlaylistReps.filter(rep => Playlist.isEnabled(rep.playlist));\n if (!enabledPlaylistReps.length) {\n // if there are no enabled playlists, then they have all been excluded or disabled\n // by the user through the representations api. In this case, ignore exclusion and\n // fallback to what the user wants by using playlists the user has not disabled.\n enabledPlaylistReps = sortedPlaylistReps.filter(rep => !Playlist.isDisabled(rep.playlist));\n } // filter out any variant that has greater effective bitrate\n // than the current estimated bandwidth\n\n const bandwidthPlaylistReps = enabledPlaylistReps.filter(rep => rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth);\n let highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth\n // and then taking the very first element\n\n const bandwidthBestRep = bandwidthPlaylistReps.filter(rep => rep.bandwidth === highestRemainingBandwidthRep.bandwidth)[0]; // if we're not going to limit renditions by player size, make an early decision.\n\n if (limitRenditionByPlayerDimensions === false) {\n const chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n if (chosenRep && chosenRep.playlist) {\n let type = 'sortedPlaylistReps';\n if (bandwidthBestRep) {\n type = 'bandwidthBestRep';\n }\n if (enabledPlaylistReps[0]) {\n type = 'enabledPlaylistReps';\n }\n logFn(`choosing ${representationToString(chosenRep)} using ${type} with options`, options);\n return chosenRep.playlist;\n }\n logFn('could not choose a playlist with options', options);\n return null;\n } // filter out playlists without resolution information\n\n const haveResolution = bandwidthPlaylistReps.filter(rep => rep.width && rep.height); // sort variants by resolution\n\n stableSort(haveResolution, (left, right) => left.width - right.width); // if we have the exact resolution as the player use it\n\n const resolutionBestRepList = haveResolution.filter(rep => rep.width === playerWidth && rep.height === playerHeight);\n highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution\n\n const resolutionBestRep = resolutionBestRepList.filter(rep => rep.bandwidth === highestRemainingBandwidthRep.bandwidth)[0];\n let resolutionPlusOneList;\n let resolutionPlusOneSmallest;\n let resolutionPlusOneRep; // find the smallest variant that is larger than the player\n // if there is no match of exact resolution\n\n if (!resolutionBestRep) {\n resolutionPlusOneList = haveResolution.filter(rep => rep.width > playerWidth || rep.height > playerHeight); // find all the variants have the same smallest resolution\n\n resolutionPlusOneSmallest = resolutionPlusOneList.filter(rep => rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height); // ensure that we also pick the highest bandwidth variant that\n // is just-larger-than the video player\n\n highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n resolutionPlusOneRep = resolutionPlusOneSmallest.filter(rep => rep.bandwidth === highestRemainingBandwidthRep.bandwidth)[0];\n }\n let leastPixelDiffRep; // If this selector proves to be better than others,\n // resolutionPlusOneRep and resolutionBestRep and all\n // the code involving them should be removed.\n\n if (playlistController.leastPixelDiffSelector) {\n // find the variant that is closest to the player's pixel size\n const leastPixelDiffList = haveResolution.map(rep => {\n rep.pixelDiff = Math.abs(rep.width - playerWidth) + Math.abs(rep.height - playerHeight);\n return rep;\n }); // get the highest bandwidth, closest resolution playlist\n\n stableSort(leastPixelDiffList, (left, right) => {\n // sort by highest bandwidth if pixelDiff is the same\n if (left.pixelDiff === right.pixelDiff) {\n return right.bandwidth - left.bandwidth;\n }\n return left.pixelDiff - right.pixelDiff;\n });\n leastPixelDiffRep = leastPixelDiffList[0];\n } // fallback chain of variants\n\n const chosenRep = leastPixelDiffRep || resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n if (chosenRep && chosenRep.playlist) {\n let type = 'sortedPlaylistReps';\n if (leastPixelDiffRep) {\n type = 'leastPixelDiffRep';\n } else if (resolutionPlusOneRep) {\n type = 'resolutionPlusOneRep';\n } else if (resolutionBestRep) {\n type = 'resolutionBestRep';\n } else if (bandwidthBestRep) {\n type = 'bandwidthBestRep';\n } else if (enabledPlaylistReps[0]) {\n type = 'enabledPlaylistReps';\n }\n logFn(`choosing ${representationToString(chosenRep)} using ${type} with options`, options);\n return chosenRep.playlist;\n }\n logFn('could not choose a playlist with options', options);\n return null;\n };\n\n /**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n const lastBandwidthSelector = function () {\n const pixelRatio = this.useDevicePixelRatio ? window.devicePixelRatio || 1 : 1;\n return simpleSelector(this.playlists.main, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.playlistController_);\n };\n /**\n * Chooses the appropriate media playlist based on an\n * exponential-weighted moving average of the bandwidth after\n * filtering for player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @param {number} decay - a number between 0 and 1. Higher values of\n * this parameter will cause previous bandwidth estimates to lose\n * significance more quickly.\n * @return {Function} a function which can be invoked to create a new\n * playlist selector function.\n * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average\n */\n\n const movingAverageBandwidthSelector = function (decay) {\n let average = -1;\n let lastSystemBandwidth = -1;\n if (decay < 0 || decay > 1) {\n throw new Error('Moving average bandwidth decay must be between 0 and 1.');\n }\n return function () {\n const pixelRatio = this.useDevicePixelRatio ? window.devicePixelRatio || 1 : 1;\n if (average < 0) {\n average = this.systemBandwidth;\n lastSystemBandwidth = this.systemBandwidth;\n } // stop the average value from decaying for every 250ms\n // when the systemBandwidth is constant\n // and\n // stop average from setting to a very low value when the\n // systemBandwidth becomes 0 in case of chunk cancellation\n\n if (this.systemBandwidth > 0 && this.systemBandwidth !== lastSystemBandwidth) {\n average = decay * this.systemBandwidth + (1 - decay) * average;\n lastSystemBandwidth = this.systemBandwidth;\n }\n return simpleSelector(this.playlists.main, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.playlistController_);\n };\n };\n /**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n * Object of information required to use this selector\n * @param {Object} settings.main\n * Object representation of the main manifest\n * @param {number} settings.currentTime\n * The current time of the player\n * @param {number} settings.bandwidth\n * Current measured bandwidth\n * @param {number} settings.duration\n * Duration of the media\n * @param {number} settings.segmentDuration\n * Segment duration to be used in round trip time calculations\n * @param {number} settings.timeUntilRebuffer\n * Time left in seconds until the player has to rebuffer\n * @param {number} settings.currentTimeline\n * The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n * SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n * {Object} return.playlist\n * The highest bandwidth playlist with the least amount of rebuffering\n * {Number} return.rebufferingImpact\n * The amount of time in seconds switching to this playlist will rebuffer. A\n * negative value means that switching will cause zero rebuffering.\n */\n\n const minRebufferMaxBandwidthSelector = function (settings) {\n const {\n main,\n currentTime,\n bandwidth,\n duration,\n segmentDuration,\n timeUntilRebuffer,\n currentTimeline,\n syncController\n } = settings; // filter out any playlists that have been excluded due to\n // incompatible configurations\n\n const compatiblePlaylists = main.playlists.filter(playlist => !Playlist.isIncompatible(playlist)); // filter out any playlists that have been disabled manually through the representations\n // api or excluded temporarily due to playback errors.\n\n let enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);\n if (!enabledPlaylists.length) {\n // if there are no enabled playlists, then they have all been excluded or disabled\n // by the user through the representations api. In this case, ignore exclusion and\n // fallback to what the user wants by using playlists the user has not disabled.\n enabledPlaylists = compatiblePlaylists.filter(playlist => !Playlist.isDisabled(playlist));\n }\n const bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));\n const rebufferingEstimates = bandwidthPlaylists.map(playlist => {\n const syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a\n // sync request first. This will double the request time\n\n const numRequests = syncPoint ? 1 : 2;\n const requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n const rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n return {\n playlist,\n rebufferingImpact\n };\n });\n const noRebufferingPlaylists = rebufferingEstimates.filter(estimate => estimate.rebufferingImpact <= 0); // Sort by bandwidth DESC\n\n stableSort(noRebufferingPlaylists, (a, b) => comparePlaylistBandwidth(b.playlist, a.playlist));\n if (noRebufferingPlaylists.length) {\n return noRebufferingPlaylists[0];\n }\n stableSort(rebufferingEstimates, (a, b) => a.rebufferingImpact - b.rebufferingImpact);\n return rebufferingEstimates[0] || null;\n };\n /**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video. If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Object|null}\n * {Object} return.playlist\n * The lowest bitrate playlist that contains a video codec. If no such rendition\n * exists pick the lowest audio rendition.\n */\n\n const lowestBitrateCompatibleVariantSelector = function () {\n // filter out any playlists that have been excluded due to\n // incompatible configurations or playback errors\n const playlists = this.playlists.main.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate\n\n stableSort(playlists, (a, b) => comparePlaylistBandwidth(a, b)); // Parse and assume that playlists with no video codec have no video\n // (this is not necessarily true, although it is generally true).\n //\n // If an entire manifest has no valid videos everything will get filtered\n // out.\n\n const playlistsWithVideo = playlists.filter(playlist => !!codecsForPlaylist(this.playlists.main, playlist).video);\n return playlistsWithVideo[0] || null;\n };\n\n /**\n * Combine all segments into a single Uint8Array\n *\n * @param {Object} segmentObj\n * @return {Uint8Array} concatenated bytes\n * @private\n */\n const concatSegments = segmentObj => {\n let offset = 0;\n let tempBuffer;\n if (segmentObj.bytes) {\n tempBuffer = new Uint8Array(segmentObj.bytes); // combine the individual segments into one large typed-array\n\n segmentObj.segments.forEach(segment => {\n tempBuffer.set(segment, offset);\n offset += segment.byteLength;\n });\n }\n return tempBuffer;\n };\n\n /**\n * @file text-tracks.js\n */\n /**\n * Create captions text tracks on video.js if they do not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {Object} tech the video.js tech\n * @param {Object} captionStream the caption stream to create\n * @private\n */\n\n const createCaptionsTrackIfNotExists = function (inbandTextTracks, tech, captionStream) {\n if (!inbandTextTracks[captionStream]) {\n tech.trigger({\n type: 'usage',\n name: 'vhs-608'\n });\n let instreamId = captionStream; // we need to translate SERVICEn for 708 to how mux.js currently labels them\n\n if (/^cc708_/.test(captionStream)) {\n instreamId = 'SERVICE' + captionStream.split('_')[1];\n }\n const track = tech.textTracks().getTrackById(instreamId);\n if (track) {\n // Resuse an existing track with a CC# id because this was\n // very likely created by videojs-contrib-hls from information\n // in the m3u8 for us to use\n inbandTextTracks[captionStream] = track;\n } else {\n // This section gets called when we have caption services that aren't specified in the manifest.\n // Manifest level caption services are handled in media-groups.js under CLOSED-CAPTIONS.\n const captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n let label = captionStream;\n let language = captionStream;\n let def = false;\n const captionService = captionServices[instreamId];\n if (captionService) {\n label = captionService.label;\n language = captionService.language;\n def = captionService.default;\n } // Otherwise, create a track with the default `CC#` label and\n // without a language\n\n inbandTextTracks[captionStream] = tech.addRemoteTextTrack({\n kind: 'captions',\n id: instreamId,\n // TODO: investigate why this doesn't seem to turn the caption on by default\n default: def,\n label,\n language\n }, false).track;\n }\n }\n };\n /**\n * Add caption text track data to a source handler given an array of captions\n *\n * @param {Object}\n * @param {Object} inbandTextTracks the inband text tracks\n * @param {number} timestampOffset the timestamp offset of the source buffer\n * @param {Array} captionArray an array of caption data\n * @private\n */\n\n const addCaptionData = function ({\n inbandTextTracks,\n captionArray,\n timestampOffset\n }) {\n if (!captionArray) {\n return;\n }\n const Cue = window.WebKitDataCue || window.VTTCue;\n captionArray.forEach(caption => {\n const track = caption.stream;\n inbandTextTracks[track].addCue(new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, caption.text));\n });\n };\n /**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\n\n const deprecateOldCue = function (cue) {\n Object.defineProperties(cue.frame, {\n id: {\n get() {\n videojs.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n return cue.value.key;\n }\n },\n value: {\n get() {\n videojs.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n return cue.value.data;\n }\n },\n privateData: {\n get() {\n videojs.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n return cue.value.data;\n }\n }\n });\n };\n /**\n * Add metadata text track data to a source handler given an array of metadata\n *\n * @param {Object}\n * @param {Object} inbandTextTracks the inband text tracks\n * @param {Array} metadataArray an array of meta data\n * @param {number} timestampOffset the timestamp offset of the source buffer\n * @param {number} videoDuration the duration of the video\n * @private\n */\n\n const addMetadata = ({\n inbandTextTracks,\n metadataArray,\n timestampOffset,\n videoDuration\n }) => {\n if (!metadataArray) {\n return;\n }\n const Cue = window.WebKitDataCue || window.VTTCue;\n const metadataTrack = inbandTextTracks.metadataTrack_;\n if (!metadataTrack) {\n return;\n }\n metadataArray.forEach(metadata => {\n const time = metadata.cueTime + timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,\n // ignore this bit of metadata.\n // This likely occurs when you have an non-timed ID3 tag like TIT2,\n // which is the \"Title/Songname/Content description\" frame\n\n if (typeof time !== 'number' || window.isNaN(time) || time < 0 || !(time < Infinity)) {\n return;\n }\n metadata.frames.forEach(frame => {\n const cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n cue.frame = frame;\n cue.value = frame;\n deprecateOldCue(cue);\n metadataTrack.addCue(cue);\n });\n });\n if (!metadataTrack.cues || !metadataTrack.cues.length) {\n return;\n } // Updating the metadeta cues so that\n // the endTime of each cue is the startTime of the next cue\n // the endTime of last cue is the duration of the video\n\n const cues = metadataTrack.cues;\n const cuesArray = []; // Create a copy of the TextTrackCueList...\n // ...disregarding cues with a falsey value\n\n for (let i = 0; i < cues.length; i++) {\n if (cues[i]) {\n cuesArray.push(cues[i]);\n }\n } // Group cues by their startTime value\n\n const cuesGroupedByStartTime = cuesArray.reduce((obj, cue) => {\n const timeSlot = obj[cue.startTime] || [];\n timeSlot.push(cue);\n obj[cue.startTime] = timeSlot;\n return obj;\n }, {}); // Sort startTimes by ascending order\n\n const sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort((a, b) => Number(a) - Number(b)); // Map each cue group's endTime to the next group's startTime\n\n sortedStartTimes.forEach((startTime, idx) => {\n const cueGroup = cuesGroupedByStartTime[startTime];\n const nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime\n\n cueGroup.forEach(cue => {\n cue.endTime = nextTime;\n });\n });\n };\n /**\n * Create metadata text track on video.js if it does not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {string} dispatchType the inband metadata track dispatch type\n * @param {Object} tech the video.js tech\n * @private\n */\n\n const createMetadataTrackIfNotExists = (inbandTextTracks, dispatchType, tech) => {\n if (inbandTextTracks.metadataTrack_) {\n return;\n }\n inbandTextTracks.metadataTrack_ = tech.addRemoteTextTrack({\n kind: 'metadata',\n label: 'Timed Metadata'\n }, false).track;\n inbandTextTracks.metadataTrack_.inBandMetadataTrackDispatchType = dispatchType;\n };\n /**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\n const removeCuesFromTrack = function (start, end, track) {\n let i;\n let cue;\n if (!track) {\n return;\n }\n if (!track.cues) {\n return;\n }\n i = track.cues.length;\n while (i--) {\n cue = track.cues[i]; // Remove any cue within the provided start and end time\n\n if (cue.startTime >= start && cue.endTime <= end) {\n track.removeCue(cue);\n }\n }\n };\n /**\n * Remove duplicate cues from a track on video.js (a cue is considered a\n * duplicate if it has the same time interval and text as another)\n *\n * @param {Object} track the text track to remove the duplicate cues from\n * @private\n */\n\n const removeDuplicateCuesFromTrack = function (track) {\n const cues = track.cues;\n if (!cues) {\n return;\n }\n for (let i = 0; i < cues.length; i++) {\n const duplicates = [];\n let occurrences = 0;\n for (let j = 0; j < cues.length; j++) {\n if (cues[i].startTime === cues[j].startTime && cues[i].endTime === cues[j].endTime && cues[i].text === cues[j].text) {\n occurrences++;\n if (occurrences > 1) {\n duplicates.push(cues[j]);\n }\n }\n }\n if (duplicates.length) {\n duplicates.forEach(dupe => track.removeCue(dupe));\n }\n }\n };\n\n /**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n * The current buffer of gop information\n * @param {number} currentTime\n * The current time\n * @param {Double} mapping\n * Offset to map display time to stream presentation time\n * @return {Array}\n * List of gops considered safe to append over\n */\n\n const gopsSafeToAlignWith = (buffer, currentTime, mapping) => {\n if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {\n return [];\n } // pts value for current time + 3 seconds to give a bit more wiggle room\n\n const currentTimePts = Math.ceil((currentTime - mapping + 3) * clock_1);\n let i;\n for (i = 0; i < buffer.length; i++) {\n if (buffer[i].pts > currentTimePts) {\n break;\n }\n }\n return buffer.slice(i);\n };\n /**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n * The current buffer of gop information\n * @param {Array} gops\n * List of new gop information\n * @param {boolean} replace\n * If true, replace the buffer with the new gop information. If false, append the\n * new gop information to the buffer in the right location of time.\n * @return {Array}\n * Updated list of gop information\n */\n\n const updateGopBuffer = (buffer, gops, replace) => {\n if (!gops.length) {\n return buffer;\n }\n if (replace) {\n // If we are in safe append mode, then completely overwrite the gop buffer\n // with the most recent appeneded data. This will make sure that when appending\n // future segments, we only try to align with gops that are both ahead of current\n // time and in the last segment appended.\n return gops.slice();\n }\n const start = gops[0].pts;\n let i = 0;\n for (i; i < buffer.length; i++) {\n if (buffer[i].pts >= start) {\n break;\n }\n }\n return buffer.slice(0, i).concat(gops);\n };\n /**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n * The current buffer of gop information\n * @param {Double} start\n * position to start the remove at\n * @param {Double} end\n * position to end the remove at\n * @param {Double} mapping\n * Offset to map display time to stream presentation time\n */\n\n const removeGopBuffer = (buffer, start, end, mapping) => {\n const startPts = Math.ceil((start - mapping) * clock_1);\n const endPts = Math.ceil((end - mapping) * clock_1);\n const updatedBuffer = buffer.slice();\n let i = buffer.length;\n while (i--) {\n if (buffer[i].pts <= endPts) {\n break;\n }\n }\n if (i === -1) {\n // no removal because end of remove range is before start of buffer\n return updatedBuffer;\n }\n let j = i + 1;\n while (j--) {\n if (buffer[j].pts <= startPts) {\n break;\n }\n } // clamp remove range start to 0 index\n\n j = Math.max(j, 0);\n updatedBuffer.splice(j, i - j + 1);\n return updatedBuffer;\n };\n const shallowEqual = function (a, b) {\n // if both are undefined\n // or one or the other is undefined\n // they are not equal\n if (!a && !b || !a && b || a && !b) {\n return false;\n } // they are the same object and thus, equal\n\n if (a === b) {\n return true;\n } // sort keys so we can make sure they have\n // all the same keys later.\n\n const akeys = Object.keys(a).sort();\n const bkeys = Object.keys(b).sort(); // different number of keys, not equal\n\n if (akeys.length !== bkeys.length) {\n return false;\n }\n for (let i = 0; i < akeys.length; i++) {\n const key = akeys[i]; // different sorted keys, not equal\n\n if (key !== bkeys[i]) {\n return false;\n } // different values, not equal\n\n if (a[key] !== b[key]) {\n return false;\n }\n }\n return true;\n };\n\n // https://www.w3.org/TR/WebIDL-1/#quotaexceedederror\n const QUOTA_EXCEEDED_ERR = 22;\n\n /**\n * The segment loader has no recourse except to fetch a segment in the\n * current playlist and use the internal timestamps in that segment to\n * generate a syncPoint. This function returns a good candidate index\n * for that process.\n *\n * @param {Array} segments - the segments array from a playlist.\n * @return {number} An index of a segment from the playlist to load\n */\n\n const getSyncSegmentCandidate = function (currentTimeline, segments, targetTime) {\n segments = segments || [];\n const timelineSegments = [];\n let time = 0;\n for (let i = 0; i < segments.length; i++) {\n const segment = segments[i];\n if (currentTimeline === segment.timeline) {\n timelineSegments.push(i);\n time += segment.duration;\n if (time > targetTime) {\n return i;\n }\n }\n }\n if (timelineSegments.length === 0) {\n return 0;\n } // default to the last timeline segment\n\n return timelineSegments[timelineSegments.length - 1];\n }; // In the event of a quota exceeded error, keep at least one second of back buffer. This\n // number was arbitrarily chosen and may be updated in the future, but seemed reasonable\n // as a start to prevent any potential issues with removing content too close to the\n // playhead.\n\n const MIN_BACK_BUFFER = 1; // in ms\n\n const CHECK_BUFFER_DELAY = 500;\n const finite = num => typeof num === 'number' && isFinite(num); // With most content hovering around 30fps, if a segment has a duration less than a half\n // frame at 30fps or one frame at 60fps, the bandwidth and throughput calculations will\n // not accurately reflect the rest of the content.\n\n const MIN_SEGMENT_DURATION_TO_SAVE_STATS = 1 / 60;\n const illegalMediaSwitch = (loaderType, startingMedia, trackInfo) => {\n // Although these checks should most likely cover non 'main' types, for now it narrows\n // the scope of our checks.\n if (loaderType !== 'main' || !startingMedia || !trackInfo) {\n return null;\n }\n if (!trackInfo.hasAudio && !trackInfo.hasVideo) {\n return 'Neither audio nor video found in segment.';\n }\n if (startingMedia.hasVideo && !trackInfo.hasVideo) {\n return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n }\n if (!startingMedia.hasVideo && trackInfo.hasVideo) {\n return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n }\n return null;\n };\n /**\n * Calculates a time value that is safe to remove from the back buffer without interrupting\n * playback.\n *\n * @param {TimeRange} seekable\n * The current seekable range\n * @param {number} currentTime\n * The current time of the player\n * @param {number} targetDuration\n * The target duration of the current playlist\n * @return {number}\n * Time that is safe to remove from the back buffer without interrupting playback\n */\n\n const safeBackBufferTrimTime = (seekable, currentTime, targetDuration) => {\n // 30 seconds before the playhead provides a safe default for trimming.\n //\n // Choosing a reasonable default is particularly important for high bitrate content and\n // VOD videos/live streams with large windows, as the buffer may end up overfilled and\n // throw an APPEND_BUFFER_ERR.\n let trimTime = currentTime - Config.BACK_BUFFER_LENGTH;\n if (seekable.length) {\n // Some live playlists may have a shorter window of content than the full allowed back\n // buffer. For these playlists, don't save content that's no longer within the window.\n trimTime = Math.max(trimTime, seekable.start(0));\n } // Don't remove within target duration of the current time to avoid the possibility of\n // removing the GOP currently being played, as removing it can cause playback stalls.\n\n const maxTrimTime = currentTime - targetDuration;\n return Math.min(maxTrimTime, trimTime);\n };\n const segmentInfoString = segmentInfo => {\n const {\n startOfSegment,\n duration,\n segment,\n part,\n playlist: {\n mediaSequence: seq,\n id,\n segments = []\n },\n mediaIndex: index,\n partIndex,\n timeline\n } = segmentInfo;\n const segmentLen = segments.length - 1;\n let selection = 'mediaIndex/partIndex increment';\n if (segmentInfo.getMediaInfoForTime) {\n selection = `getMediaInfoForTime (${segmentInfo.getMediaInfoForTime})`;\n } else if (segmentInfo.isSyncRequest) {\n selection = 'getSyncSegmentCandidate (isSyncRequest)';\n }\n if (segmentInfo.independent) {\n selection += ` with independent ${segmentInfo.independent}`;\n }\n const hasPartIndex = typeof partIndex === 'number';\n const name = segmentInfo.segment.uri ? 'segment' : 'pre-segment';\n const zeroBasedPartCount = hasPartIndex ? getKnownPartCount({\n preloadSegment: segment\n }) - 1 : 0;\n return `${name} [${seq + index}/${seq + segmentLen}]` + (hasPartIndex ? ` part [${partIndex}/${zeroBasedPartCount}]` : '') + ` segment start/end [${segment.start} => ${segment.end}]` + (hasPartIndex ? ` part start/end [${part.start} => ${part.end}]` : '') + ` startOfSegment [${startOfSegment}]` + ` duration [${duration}]` + ` timeline [${timeline}]` + ` selected by [${selection}]` + ` playlist [${id}]`;\n };\n const timingInfoPropertyForMedia = mediaType => `${mediaType}TimingInfo`;\n /**\n * Returns the timestamp offset to use for the segment.\n *\n * @param {number} segmentTimeline\n * The timeline of the segment\n * @param {number} currentTimeline\n * The timeline currently being followed by the loader\n * @param {number} startOfSegment\n * The estimated segment start\n * @param {TimeRange[]} buffered\n * The loader's buffer\n * @param {boolean} overrideCheck\n * If true, no checks are made to see if the timestamp offset value should be set,\n * but sets it directly to a value.\n *\n * @return {number|null}\n * Either a number representing a new timestamp offset, or null if the segment is\n * part of the same timeline\n */\n\n const timestampOffsetForSegment = ({\n segmentTimeline,\n currentTimeline,\n startOfSegment,\n buffered,\n overrideCheck\n }) => {\n // Check to see if we are crossing a discontinuity to see if we need to set the\n // timestamp offset on the transmuxer and source buffer.\n //\n // Previously, we changed the timestampOffset if the start of this segment was less than\n // the currently set timestampOffset, but this isn't desirable as it can produce bad\n // behavior, especially around long running live streams.\n if (!overrideCheck && segmentTimeline === currentTimeline) {\n return null;\n } // When changing renditions, it's possible to request a segment on an older timeline. For\n // instance, given two renditions with the following:\n //\n // #EXTINF:10\n // segment1\n // #EXT-X-DISCONTINUITY\n // #EXTINF:10\n // segment2\n // #EXTINF:10\n // segment3\n //\n // And the current player state:\n //\n // current time: 8\n // buffer: 0 => 20\n //\n // The next segment on the current rendition would be segment3, filling the buffer from\n // 20s onwards. However, if a rendition switch happens after segment2 was requested,\n // then the next segment to be requested will be segment1 from the new rendition in\n // order to fill time 8 and onwards. Using the buffered end would result in repeated\n // content (since it would position segment1 of the new rendition starting at 20s). This\n // case can be identified when the new segment's timeline is a prior value. Instead of\n // using the buffered end, the startOfSegment can be used, which, hopefully, will be\n // more accurate to the actual start time of the segment.\n\n if (segmentTimeline < currentTimeline) {\n return startOfSegment;\n } // segmentInfo.startOfSegment used to be used as the timestamp offset, however, that\n // value uses the end of the last segment if it is available. While this value\n // should often be correct, it's better to rely on the buffered end, as the new\n // content post discontinuity should line up with the buffered end as if it were\n // time 0 for the new content.\n\n return buffered.length ? buffered.end(buffered.length - 1) : startOfSegment;\n };\n /**\n * Returns whether or not the loader should wait for a timeline change from the timeline\n * change controller before processing the segment.\n *\n * Primary timing in VHS goes by video. This is different from most media players, as\n * audio is more often used as the primary timing source. For the foreseeable future, VHS\n * will continue to use video as the primary timing source, due to the current logic and\n * expectations built around it.\n\n * Since the timing follows video, in order to maintain sync, the video loader is\n * responsible for setting both audio and video source buffer timestamp offsets.\n *\n * Setting different values for audio and video source buffers could lead to\n * desyncing. The following examples demonstrate some of the situations where this\n * distinction is important. Note that all of these cases involve demuxed content. When\n * content is muxed, the audio and video are packaged together, therefore syncing\n * separate media playlists is not an issue.\n *\n * CASE 1: Audio prepares to load a new timeline before video:\n *\n * Timeline: 0 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader: ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader ^\n *\n * In the above example, the audio loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the video loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the audio loader goes ahead and loads and appends the 6th segment before the video\n * loader crosses the discontinuity, then when appended, the 6th audio segment will use\n * the timestamp offset from timeline 0. This will likely lead to desyncing. In addition,\n * the audio loader must provide the audioAppendStart value to trim the content in the\n * transmuxer, and that value relies on the audio timestamp offset. Since the audio\n * timestamp offset is set by the video (main) loader, the audio loader shouldn't load the\n * segment until that value is provided.\n *\n * CASE 2: Video prepares to load a new timeline before audio:\n *\n * Timeline: 0 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader: ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader ^\n *\n * In the above example, the video loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the audio loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the video loader goes ahead and loads and appends the 6th segment, then once the\n * segment is loaded and processed, both the video and audio timestamp offsets will be\n * set, since video is used as the primary timing source. This is to ensure content lines\n * up appropriately, as any modifications to the video timing are reflected by audio when\n * the video loader sets the audio and video timestamp offsets to the same value. However,\n * setting the timestamp offset for audio before audio has had a chance to change\n * timelines will likely lead to desyncing, as the audio loader will append segment 5 with\n * a timestamp intended to apply to segments from timeline 1 rather than timeline 0.\n *\n * CASE 3: When seeking, audio prepares to load a new timeline before video\n *\n * Timeline: 0 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader: ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader ^\n *\n * In the above example, both audio and video loaders are loading segments from timeline\n * 0, but imagine that the seek originated from timeline 1.\n *\n * When seeking to a new timeline, the timestamp offset will be set based on the expected\n * segment start of the loaded video segment. In order to maintain sync, the audio loader\n * must wait for the video loader to load its segment and update both the audio and video\n * timestamp offsets before it may load and append its own segment. This is the case\n * whether the seek results in a mismatched segment request (e.g., the audio loader\n * chooses to load segment 3 and the video loader chooses to load segment 4) or the\n * loaders choose to load the same segment index from each playlist, as the segments may\n * not be aligned perfectly, even for matching segment indexes.\n *\n * @param {Object} timelinechangeController\n * @param {number} currentTimeline\n * The timeline currently being followed by the loader\n * @param {number} segmentTimeline\n * The timeline of the segment being loaded\n * @param {('main'|'audio')} loaderType\n * The loader type\n * @param {boolean} audioDisabled\n * Whether the audio is disabled for the loader. This should only be true when the\n * loader may have muxed audio in its segment, but should not append it, e.g., for\n * the main loader when an alternate audio playlist is active.\n *\n * @return {boolean}\n * Whether the loader should wait for a timeline change from the timeline change\n * controller before processing the segment\n */\n\n const shouldWaitForTimelineChange = ({\n timelineChangeController,\n currentTimeline,\n segmentTimeline,\n loaderType,\n audioDisabled\n }) => {\n if (currentTimeline === segmentTimeline) {\n return false;\n }\n if (loaderType === 'audio') {\n const lastMainTimelineChange = timelineChangeController.lastTimelineChange({\n type: 'main'\n }); // Audio loader should wait if:\n //\n // * main hasn't had a timeline change yet (thus has not loaded its first segment)\n // * main hasn't yet changed to the timeline audio is looking to load\n\n return !lastMainTimelineChange || lastMainTimelineChange.to !== segmentTimeline;\n } // The main loader only needs to wait for timeline changes if there's demuxed audio.\n // Otherwise, there's nothing to wait for, since audio would be muxed into the main\n // loader's segments (or the content is audio/video only and handled by the main\n // loader).\n\n if (loaderType === 'main' && audioDisabled) {\n const pendingAudioTimelineChange = timelineChangeController.pendingTimelineChange({\n type: 'audio'\n }); // Main loader should wait for the audio loader if audio is not pending a timeline\n // change to the current timeline.\n //\n // Since the main loader is responsible for setting the timestamp offset for both\n // audio and video, the main loader must wait for audio to be about to change to its\n // timeline before setting the offset, otherwise, if audio is behind in loading,\n // segments from the previous timeline would be adjusted by the new timestamp offset.\n //\n // This requirement means that video will not cross a timeline until the audio is\n // about to cross to it, so that way audio and video will always cross the timeline\n // together.\n //\n // In addition to normal timeline changes, these rules also apply to the start of a\n // stream (going from a non-existent timeline, -1, to timeline 0). It's important\n // that these rules apply to the first timeline change because if they did not, it's\n // possible that the main loader will cross two timelines before the audio loader has\n // crossed one. Logic may be implemented to handle the startup as a special case, but\n // it's easier to simply treat all timeline changes the same.\n\n if (pendingAudioTimelineChange && pendingAudioTimelineChange.to === segmentTimeline) {\n return false;\n }\n return true;\n }\n return false;\n };\n const mediaDuration = timingInfos => {\n let maxDuration = 0;\n ['video', 'audio'].forEach(function (type) {\n const typeTimingInfo = timingInfos[`${type}TimingInfo`];\n if (!typeTimingInfo) {\n return;\n }\n const {\n start,\n end\n } = typeTimingInfo;\n let duration;\n if (typeof start === 'bigint' || typeof end === 'bigint') {\n duration = window.BigInt(end) - window.BigInt(start);\n } else if (typeof start === 'number' && typeof end === 'number') {\n duration = end - start;\n }\n if (typeof duration !== 'undefined' && duration > maxDuration) {\n maxDuration = duration;\n }\n }); // convert back to a number if it is lower than MAX_SAFE_INTEGER\n // as we only need BigInt when we are above that.\n\n if (typeof maxDuration === 'bigint' && maxDuration < Number.MAX_SAFE_INTEGER) {\n maxDuration = Number(maxDuration);\n }\n return maxDuration;\n };\n const segmentTooLong = ({\n segmentDuration,\n maxDuration\n }) => {\n // 0 duration segments are most likely due to metadata only segments or a lack of\n // information.\n if (!segmentDuration) {\n return false;\n } // For HLS:\n //\n // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1\n // The EXTINF duration of each Media Segment in the Playlist\n // file, when rounded to the nearest integer, MUST be less than or equal\n // to the target duration; longer segments can trigger playback stalls\n // or other errors.\n //\n // For DASH, the mpd-parser uses the largest reported segment duration as the target\n // duration. Although that reported duration is occasionally approximate (i.e., not\n // exact), a strict check may report that a segment is too long more often in DASH.\n\n return Math.round(segmentDuration) > maxDuration + TIME_FUDGE_FACTOR;\n };\n const getTroublesomeSegmentDurationMessage = (segmentInfo, sourceType) => {\n // Right now we aren't following DASH's timing model exactly, so only perform\n // this check for HLS content.\n if (sourceType !== 'hls') {\n return null;\n }\n const segmentDuration = mediaDuration({\n audioTimingInfo: segmentInfo.audioTimingInfo,\n videoTimingInfo: segmentInfo.videoTimingInfo\n }); // Don't report if we lack information.\n //\n // If the segment has a duration of 0 it is either a lack of information or a\n // metadata only segment and shouldn't be reported here.\n\n if (!segmentDuration) {\n return null;\n }\n const targetDuration = segmentInfo.playlist.targetDuration;\n const isSegmentWayTooLong = segmentTooLong({\n segmentDuration,\n maxDuration: targetDuration * 2\n });\n const isSegmentSlightlyTooLong = segmentTooLong({\n segmentDuration,\n maxDuration: targetDuration\n });\n const segmentTooLongMessage = `Segment with index ${segmentInfo.mediaIndex} ` + `from playlist ${segmentInfo.playlist.id} ` + `has a duration of ${segmentDuration} ` + `when the reported duration is ${segmentInfo.duration} ` + `and the target duration is ${targetDuration}. ` + 'For HLS content, a duration in excess of the target duration may result in ' + 'playback issues. See the HLS specification section on EXT-X-TARGETDURATION for ' + 'more details: ' + 'https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1';\n if (isSegmentWayTooLong || isSegmentSlightlyTooLong) {\n return {\n severity: isSegmentWayTooLong ? 'warn' : 'info',\n message: segmentTooLongMessage\n };\n }\n return null;\n };\n /**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n class SegmentLoader extends videojs.EventTarget {\n constructor(settings, options = {}) {\n super(); // check pre-conditions\n\n if (!settings) {\n throw new TypeError('Initialization settings are required');\n }\n if (typeof settings.currentTime !== 'function') {\n throw new TypeError('No currentTime getter specified');\n }\n if (!settings.mediaSource) {\n throw new TypeError('No MediaSource specified');\n } // public properties\n\n this.bandwidth = settings.bandwidth;\n this.throughput = {\n rate: 0,\n count: 0\n };\n this.roundTrip = NaN;\n this.resetStats_();\n this.mediaIndex = null;\n this.partIndex = null; // private settings\n\n this.hasPlayed_ = settings.hasPlayed;\n this.currentTime_ = settings.currentTime;\n this.seekable_ = settings.seekable;\n this.seeking_ = settings.seeking;\n this.duration_ = settings.duration;\n this.mediaSource_ = settings.mediaSource;\n this.vhs_ = settings.vhs;\n this.loaderType_ = settings.loaderType;\n this.currentMediaInfo_ = void 0;\n this.startingMediaInfo_ = void 0;\n this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n this.goalBufferLength_ = settings.goalBufferLength;\n this.sourceType_ = settings.sourceType;\n this.sourceUpdater_ = settings.sourceUpdater;\n this.inbandTextTracks_ = settings.inbandTextTracks;\n this.state_ = 'INIT';\n this.timelineChangeController_ = settings.timelineChangeController;\n this.shouldSaveSegmentTimingInfo_ = true;\n this.parse708captions_ = settings.parse708captions;\n this.useDtsForTimestampOffset_ = settings.useDtsForTimestampOffset;\n this.captionServices_ = settings.captionServices;\n this.exactManifestTimings = settings.exactManifestTimings; // private instance variables\n\n this.checkBufferTimeout_ = null;\n this.error_ = void 0;\n this.currentTimeline_ = -1;\n this.pendingSegment_ = null;\n this.xhrOptions_ = null;\n this.pendingSegments_ = [];\n this.audioDisabled_ = false;\n this.isPendingTimestampOffset_ = false; // TODO possibly move gopBuffer and timeMapping info to a separate controller\n\n this.gopBuffer_ = [];\n this.timeMapping_ = 0;\n this.safeAppend_ = videojs.browser.IE_VERSION >= 11;\n this.appendInitSegment_ = {\n audio: true,\n video: true\n };\n this.playlistOfLastInitSegment_ = {\n audio: null,\n video: null\n };\n this.callQueue_ = []; // If the segment loader prepares to load a segment, but does not have enough\n // information yet to start the loading process (e.g., if the audio loader wants to\n // load a segment from the next timeline but the main loader hasn't yet crossed that\n // timeline), then the load call will be added to the queue until it is ready to be\n // processed.\n\n this.loadQueue_ = [];\n this.metadataQueue_ = {\n id3: [],\n caption: []\n };\n this.waitingOnRemove_ = false;\n this.quotaExceededErrorRetryTimeout_ = null; // Fragmented mp4 playback\n\n this.activeInitSegmentId_ = null;\n this.initSegments_ = {}; // HLSe playback\n\n this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;\n this.keyCache_ = {};\n this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings\n // between a time in the display time and a segment index within\n // a playlist\n\n this.syncController_ = settings.syncController;\n this.syncPoint_ = {\n segmentIndex: 0,\n time: 0\n };\n this.transmuxer_ = this.createTransmuxer_();\n this.triggerSyncInfoUpdate_ = () => this.trigger('syncinfoupdate');\n this.syncController_.on('syncinfoupdate', this.triggerSyncInfoUpdate_);\n this.mediaSource_.addEventListener('sourceopen', () => {\n if (!this.isEndOfStream_()) {\n this.ended_ = false;\n }\n }); // ...for determining the fetch location\n\n this.fetchAtBuffer_ = false;\n this.logger_ = logger(`SegmentLoader[${this.loaderType_}]`);\n Object.defineProperty(this, 'state', {\n get() {\n return this.state_;\n },\n set(newState) {\n if (newState !== this.state_) {\n this.logger_(`${this.state_} -> ${newState}`);\n this.state_ = newState;\n this.trigger('statechange');\n }\n }\n });\n this.sourceUpdater_.on('ready', () => {\n if (this.hasEnoughInfoToAppend_()) {\n this.processCallQueue_();\n }\n }); // Only the main loader needs to listen for pending timeline changes, as the main\n // loader should wait for audio to be ready to change its timeline so that both main\n // and audio timelines change together. For more details, see the\n // shouldWaitForTimelineChange function.\n\n if (this.loaderType_ === 'main') {\n this.timelineChangeController_.on('pendingtimelinechange', () => {\n if (this.hasEnoughInfoToAppend_()) {\n this.processCallQueue_();\n }\n });\n } // The main loader only listens on pending timeline changes, but the audio loader,\n // since its loads follow main, needs to listen on timeline changes. For more details,\n // see the shouldWaitForTimelineChange function.\n\n if (this.loaderType_ === 'audio') {\n this.timelineChangeController_.on('timelinechange', () => {\n if (this.hasEnoughInfoToLoad_()) {\n this.processLoadQueue_();\n }\n if (this.hasEnoughInfoToAppend_()) {\n this.processCallQueue_();\n }\n });\n }\n }\n createTransmuxer_() {\n return segmentTransmuxer.createTransmuxer({\n remux: false,\n alignGopsAtEnd: this.safeAppend_,\n keepOriginalTimestamps: true,\n parse708captions: this.parse708captions_,\n captionServices: this.captionServices_\n });\n }\n /**\n * reset all of our media stats\n *\n * @private\n */\n\n resetStats_() {\n this.mediaBytesTransferred = 0;\n this.mediaRequests = 0;\n this.mediaRequestsAborted = 0;\n this.mediaRequestsTimedout = 0;\n this.mediaRequestsErrored = 0;\n this.mediaTransferDuration = 0;\n this.mediaSecondsLoaded = 0;\n this.mediaAppends = 0;\n }\n /**\n * dispose of the SegmentLoader and reset to the default state\n */\n\n dispose() {\n this.trigger('dispose');\n this.state = 'DISPOSED';\n this.pause();\n this.abort_();\n if (this.transmuxer_) {\n this.transmuxer_.terminate();\n }\n this.resetStats_();\n if (this.checkBufferTimeout_) {\n window.clearTimeout(this.checkBufferTimeout_);\n }\n if (this.syncController_ && this.triggerSyncInfoUpdate_) {\n this.syncController_.off('syncinfoupdate', this.triggerSyncInfoUpdate_);\n }\n this.off();\n }\n setAudio(enable) {\n this.audioDisabled_ = !enable;\n if (enable) {\n this.appendInitSegment_.audio = true;\n } else {\n // remove current track audio if it gets disabled\n this.sourceUpdater_.removeAudio(0, this.duration_());\n }\n }\n /**\n * abort anything that is currently doing on with the SegmentLoader\n * and reset to a default state\n */\n\n abort() {\n if (this.state !== 'WAITING') {\n if (this.pendingSegment_) {\n this.pendingSegment_ = null;\n }\n return;\n }\n this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY\n // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n // when the request is aborted. This will prevent the loader from being stuck in the\n // WAITING state indefinitely.\n\n this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the\n // next segment\n\n if (!this.paused()) {\n this.monitorBuffer_();\n }\n }\n /**\n * abort all pending xhr requests and null any pending segements\n *\n * @private\n */\n\n abort_() {\n if (this.pendingSegment_ && this.pendingSegment_.abortRequests) {\n this.pendingSegment_.abortRequests();\n } // clear out the segment being processed\n\n this.pendingSegment_ = null;\n this.callQueue_ = [];\n this.loadQueue_ = [];\n this.metadataQueue_.id3 = [];\n this.metadataQueue_.caption = [];\n this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_);\n this.waitingOnRemove_ = false;\n window.clearTimeout(this.quotaExceededErrorRetryTimeout_);\n this.quotaExceededErrorRetryTimeout_ = null;\n }\n checkForAbort_(requestId) {\n // If the state is APPENDING, then aborts will not modify the state, meaning the first\n // callback that happens should reset the state to READY so that loading can continue.\n if (this.state === 'APPENDING' && !this.pendingSegment_) {\n this.state = 'READY';\n return true;\n }\n if (!this.pendingSegment_ || this.pendingSegment_.requestId !== requestId) {\n return true;\n }\n return false;\n }\n /**\n * set an error on the segment loader and null out any pending segements\n *\n * @param {Error} error the error to set on the SegmentLoader\n * @return {Error} the error that was set or that is currently set\n */\n\n error(error) {\n if (typeof error !== 'undefined') {\n this.logger_('error occurred:', error);\n this.error_ = error;\n }\n this.pendingSegment_ = null;\n return this.error_;\n }\n endOfStream() {\n this.ended_ = true;\n if (this.transmuxer_) {\n // need to clear out any cached data to prepare for the new segment\n segmentTransmuxer.reset(this.transmuxer_);\n }\n this.gopBuffer_.length = 0;\n this.pause();\n this.trigger('ended');\n }\n /**\n * Indicates which time ranges are buffered\n *\n * @return {TimeRange}\n * TimeRange object representing the current buffered ranges\n */\n\n buffered_() {\n const trackInfo = this.getMediaInfo_();\n if (!this.sourceUpdater_ || !trackInfo) {\n return createTimeRanges();\n }\n if (this.loaderType_ === 'main') {\n const {\n hasAudio,\n hasVideo,\n isMuxed\n } = trackInfo;\n if (hasVideo && hasAudio && !this.audioDisabled_ && !isMuxed) {\n return this.sourceUpdater_.buffered();\n }\n if (hasVideo) {\n return this.sourceUpdater_.videoBuffered();\n }\n } // One case that can be ignored for now is audio only with alt audio,\n // as we don't yet have proper support for that.\n\n return this.sourceUpdater_.audioBuffered();\n }\n /**\n * Gets and sets init segment for the provided map\n *\n * @param {Object} map\n * The map object representing the init segment to get or set\n * @param {boolean=} set\n * If true, the init segment for the provided map should be saved\n * @return {Object}\n * map object for desired init segment\n */\n\n initSegmentForMap(map, set = false) {\n if (!map) {\n return null;\n }\n const id = initSegmentId(map);\n let storedMap = this.initSegments_[id];\n if (set && !storedMap && map.bytes) {\n this.initSegments_[id] = storedMap = {\n resolvedUri: map.resolvedUri,\n byterange: map.byterange,\n bytes: map.bytes,\n tracks: map.tracks,\n timescales: map.timescales\n };\n }\n return storedMap || map;\n }\n /**\n * Gets and sets key for the provided key\n *\n * @param {Object} key\n * The key object representing the key to get or set\n * @param {boolean=} set\n * If true, the key for the provided key should be saved\n * @return {Object}\n * Key object for desired key\n */\n\n segmentKey(key, set = false) {\n if (!key) {\n return null;\n }\n const id = segmentKeyId(key);\n let storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per\n // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3\n\n if (this.cacheEncryptionKeys_ && set && !storedKey && key.bytes) {\n this.keyCache_[id] = storedKey = {\n resolvedUri: key.resolvedUri,\n bytes: key.bytes\n };\n }\n const result = {\n resolvedUri: (storedKey || key).resolvedUri\n };\n if (storedKey) {\n result.bytes = storedKey.bytes;\n }\n return result;\n }\n /**\n * Returns true if all configuration required for loading is present, otherwise false.\n *\n * @return {boolean} True if the all configuration is ready for loading\n * @private\n */\n\n couldBeginLoading_() {\n return this.playlist_ && !this.paused();\n }\n /**\n * load a playlist and start to fill the buffer\n */\n\n load() {\n // un-pause\n this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be\n // specified\n\n if (!this.playlist_) {\n return;\n } // if all the configuration is ready, initialize and begin loading\n\n if (this.state === 'INIT' && this.couldBeginLoading_()) {\n return this.init_();\n } // if we're in the middle of processing a segment already, don't\n // kick off an additional segment request\n\n if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n return;\n }\n this.state = 'READY';\n }\n /**\n * Once all the starting parameters have been specified, begin\n * operation. This method should only be invoked from the INIT\n * state.\n *\n * @private\n */\n\n init_() {\n this.state = 'READY'; // if this is the audio segment loader, and it hasn't been inited before, then any old\n // audio data from the muxed content should be removed\n\n this.resetEverything();\n return this.monitorBuffer_();\n }\n /**\n * set a playlist on the segment loader\n *\n * @param {PlaylistLoader} media the playlist to set on the segment loader\n */\n\n playlist(newPlaylist, options = {}) {\n if (!newPlaylist) {\n return;\n }\n const oldPlaylist = this.playlist_;\n const segmentInfo = this.pendingSegment_;\n this.playlist_ = newPlaylist;\n this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist\n // is always our zero-time so force a sync update each time the playlist\n // is refreshed from the server\n //\n // Use the INIT state to determine if playback has started, as the playlist sync info\n // should be fixed once requests begin (as sync points are generated based on sync\n // info), but not before then.\n\n if (this.state === 'INIT') {\n newPlaylist.syncInfo = {\n mediaSequence: newPlaylist.mediaSequence,\n time: 0\n }; // Setting the date time mapping means mapping the program date time (if available)\n // to time 0 on the player's timeline. The playlist's syncInfo serves a similar\n // purpose, mapping the initial mediaSequence to time zero. Since the syncInfo can\n // be updated as the playlist is refreshed before the loader starts loading, the\n // program date time mapping needs to be updated as well.\n //\n // This mapping is only done for the main loader because a program date time should\n // map equivalently between playlists.\n\n if (this.loaderType_ === 'main') {\n this.syncController_.setDateTimeMappingForStart(newPlaylist);\n }\n }\n let oldId = null;\n if (oldPlaylist) {\n if (oldPlaylist.id) {\n oldId = oldPlaylist.id;\n } else if (oldPlaylist.uri) {\n oldId = oldPlaylist.uri;\n }\n }\n this.logger_(`playlist update [${oldId} => ${newPlaylist.id || newPlaylist.uri}]`); // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n // in LIVE, we always want to update with new playlists (including refreshes)\n\n this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start\n // buffering now\n\n if (this.state === 'INIT' && this.couldBeginLoading_()) {\n return this.init_();\n }\n if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n if (this.mediaIndex !== null) {\n // we must reset/resync the segment loader when we switch renditions and\n // the segment loader is already synced to the previous rendition\n // on playlist changes we want it to be possible to fetch\n // at the buffer for vod but not for live. So we use resetLoader\n // for live and resyncLoader for vod. We want this because\n // if a playlist uses independent and non-independent segments/parts the\n // buffer may not accurately reflect the next segment that we should try\n // downloading.\n if (!newPlaylist.endList) {\n this.resetLoader();\n } else {\n this.resyncLoader();\n }\n }\n this.currentMediaInfo_ = void 0;\n this.trigger('playlistupdate'); // the rest of this function depends on `oldPlaylist` being defined\n\n return;\n } // we reloaded the same playlist so we are in a live scenario\n // and we will likely need to adjust the mediaIndex\n\n const mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n this.logger_(`live window shift [${mediaSequenceDiff}]`); // update the mediaIndex on the SegmentLoader\n // this is important because we can abort a request and this value must be\n // equal to the last appended mediaIndex\n\n if (this.mediaIndex !== null) {\n this.mediaIndex -= mediaSequenceDiff; // this can happen if we are going to load the first segment, but get a playlist\n // update during that. mediaIndex would go from 0 to -1 if mediaSequence in the\n // new playlist was incremented by 1.\n\n if (this.mediaIndex < 0) {\n this.mediaIndex = null;\n this.partIndex = null;\n } else {\n const segment = this.playlist_.segments[this.mediaIndex]; // partIndex should remain the same for the same segment\n // unless parts fell off of the playlist for this segment.\n // In that case we need to reset partIndex and resync\n\n if (this.partIndex && (!segment.parts || !segment.parts.length || !segment.parts[this.partIndex])) {\n const mediaIndex = this.mediaIndex;\n this.logger_(`currently processing part (index ${this.partIndex}) no longer exists.`);\n this.resetLoader(); // We want to throw away the partIndex and the data associated with it,\n // as the part was dropped from our current playlists segment.\n // The mediaIndex will still be valid so keep that around.\n\n this.mediaIndex = mediaIndex;\n }\n }\n } // update the mediaIndex on the SegmentInfo object\n // this is important because we will update this.mediaIndex with this value\n // in `handleAppendsDone_` after the segment has been successfully appended\n\n if (segmentInfo) {\n segmentInfo.mediaIndex -= mediaSequenceDiff;\n if (segmentInfo.mediaIndex < 0) {\n segmentInfo.mediaIndex = null;\n segmentInfo.partIndex = null;\n } else {\n // we need to update the referenced segment so that timing information is\n // saved for the new playlist's segment, however, if the segment fell off the\n // playlist, we can leave the old reference and just lose the timing info\n if (segmentInfo.mediaIndex >= 0) {\n segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n }\n if (segmentInfo.partIndex >= 0 && segmentInfo.segment.parts) {\n segmentInfo.part = segmentInfo.segment.parts[segmentInfo.partIndex];\n }\n }\n }\n this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n }\n /**\n * Prevent the loader from fetching additional segments. If there\n * is a segment request outstanding, it will finish processing\n * before the loader halts. A segment loader can be unpaused by\n * calling load().\n */\n\n pause() {\n if (this.checkBufferTimeout_) {\n window.clearTimeout(this.checkBufferTimeout_);\n this.checkBufferTimeout_ = null;\n }\n }\n /**\n * Returns whether the segment loader is fetching additional\n * segments when given the opportunity. This property can be\n * modified through calls to pause() and load().\n */\n\n paused() {\n return this.checkBufferTimeout_ === null;\n }\n /**\n * Delete all the buffered data and reset the SegmentLoader\n *\n * @param {Function} [done] an optional callback to be executed when the remove\n * operation is complete\n */\n\n resetEverything(done) {\n this.ended_ = false;\n this.activeInitSegmentId_ = null;\n this.appendInitSegment_ = {\n audio: true,\n video: true\n };\n this.resetLoader(); // remove from 0, the earliest point, to Infinity, to signify removal of everything.\n // VTT Segment Loader doesn't need to do anything but in the regular SegmentLoader,\n // we then clamp the value to duration if necessary.\n\n this.remove(0, Infinity, done); // clears fmp4 captions\n\n if (this.transmuxer_) {\n this.transmuxer_.postMessage({\n action: 'clearAllMp4Captions'\n }); // reset the cache in the transmuxer\n\n this.transmuxer_.postMessage({\n action: 'reset'\n });\n }\n }\n /**\n * Force the SegmentLoader to resync and start loading around the currentTime instead\n * of starting at the end of the buffer\n *\n * Useful for fast quality changes\n */\n\n resetLoader() {\n this.fetchAtBuffer_ = false;\n this.resyncLoader();\n }\n /**\n * Force the SegmentLoader to restart synchronization and make a conservative guess\n * before returning to the simple walk-forward method\n */\n\n resyncLoader() {\n if (this.transmuxer_) {\n // need to clear out any cached data to prepare for the new segment\n segmentTransmuxer.reset(this.transmuxer_);\n }\n this.mediaIndex = null;\n this.partIndex = null;\n this.syncPoint_ = null;\n this.isPendingTimestampOffset_ = false;\n this.callQueue_ = [];\n this.loadQueue_ = [];\n this.metadataQueue_.id3 = [];\n this.metadataQueue_.caption = [];\n this.abort();\n if (this.transmuxer_) {\n this.transmuxer_.postMessage({\n action: 'clearParsedMp4Captions'\n });\n }\n }\n /**\n * Remove any data in the source buffer between start and end times\n *\n * @param {number} start - the start time of the region to remove from the buffer\n * @param {number} end - the end time of the region to remove from the buffer\n * @param {Function} [done] - an optional callback to be executed when the remove\n * @param {boolean} force - force all remove operations to happen\n * operation is complete\n */\n\n remove(start, end, done = () => {}, force = false) {\n // clamp end to duration if we need to remove everything.\n // This is due to a browser bug that causes issues if we remove to Infinity.\n // videojs/videojs-contrib-hls#1225\n if (end === Infinity) {\n end = this.duration_();\n } // skip removes that would throw an error\n // commonly happens during a rendition switch at the start of a video\n // from start 0 to end 0\n\n if (end <= start) {\n this.logger_('skipping remove because end ${end} is <= start ${start}');\n return;\n }\n if (!this.sourceUpdater_ || !this.getMediaInfo_()) {\n this.logger_('skipping remove because no source updater or starting media info'); // nothing to remove if we haven't processed any media\n\n return;\n } // set it to one to complete this function's removes\n\n let removesRemaining = 1;\n const removeFinished = () => {\n removesRemaining--;\n if (removesRemaining === 0) {\n done();\n }\n };\n if (force || !this.audioDisabled_) {\n removesRemaining++;\n this.sourceUpdater_.removeAudio(start, end, removeFinished);\n } // While it would be better to only remove video if the main loader has video, this\n // should be safe with audio only as removeVideo will call back even if there's no\n // video buffer.\n //\n // In theory we can check to see if there's video before calling the remove, but in\n // the event that we're switching between renditions and from video to audio only\n // (when we add support for that), we may need to clear the video contents despite\n // what the new media will contain.\n\n if (force || this.loaderType_ === 'main') {\n this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n removesRemaining++;\n this.sourceUpdater_.removeVideo(start, end, removeFinished);\n } // remove any captions and ID3 tags\n\n for (const track in this.inbandTextTracks_) {\n removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);\n }\n removeCuesFromTrack(start, end, this.segmentMetadataTrack_); // finished this function's removes\n\n removeFinished();\n }\n /**\n * (re-)schedule monitorBufferTick_ to run as soon as possible\n *\n * @private\n */\n\n monitorBuffer_() {\n if (this.checkBufferTimeout_) {\n window.clearTimeout(this.checkBufferTimeout_);\n }\n this.checkBufferTimeout_ = window.setTimeout(this.monitorBufferTick_.bind(this), 1);\n }\n /**\n * As long as the SegmentLoader is in the READY state, periodically\n * invoke fillBuffer_().\n *\n * @private\n */\n\n monitorBufferTick_() {\n if (this.state === 'READY') {\n this.fillBuffer_();\n }\n if (this.checkBufferTimeout_) {\n window.clearTimeout(this.checkBufferTimeout_);\n }\n this.checkBufferTimeout_ = window.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n }\n /**\n * fill the buffer with segements unless the sourceBuffers are\n * currently updating\n *\n * Note: this function should only ever be called by monitorBuffer_\n * and never directly\n *\n * @private\n */\n\n fillBuffer_() {\n // TODO since the source buffer maintains a queue, and we shouldn't call this function\n // except when we're ready for the next segment, this check can most likely be removed\n if (this.sourceUpdater_.updating()) {\n return;\n } // see if we need to begin loading immediately\n\n const segmentInfo = this.chooseNextRequest_();\n if (!segmentInfo) {\n return;\n }\n if (typeof segmentInfo.timestampOffset === 'number') {\n this.isPendingTimestampOffset_ = false;\n this.timelineChangeController_.pendingTimelineChange({\n type: this.loaderType_,\n from: this.currentTimeline_,\n to: segmentInfo.timeline\n });\n }\n this.loadSegment_(segmentInfo);\n }\n /**\n * Determines if we should call endOfStream on the media source based\n * on the state of the buffer or if appened segment was the final\n * segment in the playlist.\n *\n * @param {number} [mediaIndex] the media index of segment we last appended\n * @param {Object} [playlist] a media playlist object\n * @return {boolean} do we need to call endOfStream on the MediaSource\n */\n\n isEndOfStream_(mediaIndex = this.mediaIndex, playlist = this.playlist_, partIndex = this.partIndex) {\n if (!playlist || !this.mediaSource_) {\n return false;\n }\n const segment = typeof mediaIndex === 'number' && playlist.segments[mediaIndex]; // mediaIndex is zero based but length is 1 based\n\n const appendedLastSegment = mediaIndex + 1 === playlist.segments.length; // true if there are no parts, or this is the last part.\n\n const appendedLastPart = !segment || !segment.parts || partIndex + 1 === segment.parts.length; // if we've buffered to the end of the video, we need to call endOfStream\n // so that MediaSources can trigger the `ended` event when it runs out of\n // buffered data instead of waiting for me\n\n return playlist.endList && this.mediaSource_.readyState === 'open' && appendedLastSegment && appendedLastPart;\n }\n /**\n * Determines what request should be made given current segment loader state.\n *\n * @return {Object} a request object that describes the segment/part to load\n */\n\n chooseNextRequest_() {\n const buffered = this.buffered_();\n const bufferedEnd = lastBufferedEnd(buffered) || 0;\n const bufferedTime = timeAheadOf(buffered, this.currentTime_());\n const preloaded = !this.hasPlayed_() && bufferedTime >= 1;\n const haveEnoughBuffer = bufferedTime >= this.goalBufferLength_();\n const segments = this.playlist_.segments; // return no segment if:\n // 1. we don't have segments\n // 2. The video has not yet played and we already downloaded a segment\n // 3. we already have enough buffered time\n\n if (!segments.length || preloaded || haveEnoughBuffer) {\n return null;\n }\n this.syncPoint_ = this.syncPoint_ || this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n const next = {\n partIndex: null,\n mediaIndex: null,\n startOfSegment: null,\n playlist: this.playlist_,\n isSyncRequest: Boolean(!this.syncPoint_)\n };\n if (next.isSyncRequest) {\n next.mediaIndex = getSyncSegmentCandidate(this.currentTimeline_, segments, bufferedEnd);\n } else if (this.mediaIndex !== null) {\n const segment = segments[this.mediaIndex];\n const partIndex = typeof this.partIndex === 'number' ? this.partIndex : -1;\n next.startOfSegment = segment.end ? segment.end : bufferedEnd;\n if (segment.parts && segment.parts[partIndex + 1]) {\n next.mediaIndex = this.mediaIndex;\n next.partIndex = partIndex + 1;\n } else {\n next.mediaIndex = this.mediaIndex + 1;\n }\n } else {\n // Find the segment containing the end of the buffer or current time.\n const {\n segmentIndex,\n startTime,\n partIndex\n } = Playlist.getMediaInfoForTime({\n exactManifestTimings: this.exactManifestTimings,\n playlist: this.playlist_,\n currentTime: this.fetchAtBuffer_ ? bufferedEnd : this.currentTime_(),\n startingPartIndex: this.syncPoint_.partIndex,\n startingSegmentIndex: this.syncPoint_.segmentIndex,\n startTime: this.syncPoint_.time\n });\n next.getMediaInfoForTime = this.fetchAtBuffer_ ? `bufferedEnd ${bufferedEnd}` : `currentTime ${this.currentTime_()}`;\n next.mediaIndex = segmentIndex;\n next.startOfSegment = startTime;\n next.partIndex = partIndex;\n }\n const nextSegment = segments[next.mediaIndex];\n let nextPart = nextSegment && typeof next.partIndex === 'number' && nextSegment.parts && nextSegment.parts[next.partIndex]; // if the next segment index is invalid or\n // the next partIndex is invalid do not choose a next segment.\n\n if (!nextSegment || typeof next.partIndex === 'number' && !nextPart) {\n return null;\n } // if the next segment has parts, and we don't have a partIndex.\n // Set partIndex to 0\n\n if (typeof next.partIndex !== 'number' && nextSegment.parts) {\n next.partIndex = 0;\n nextPart = nextSegment.parts[0];\n } // if we have no buffered data then we need to make sure\n // that the next part we append is \"independent\" if possible.\n // So we check if the previous part is independent, and request\n // it if it is.\n\n if (!bufferedTime && nextPart && !nextPart.independent) {\n if (next.partIndex === 0) {\n const lastSegment = segments[next.mediaIndex - 1];\n const lastSegmentLastPart = lastSegment.parts && lastSegment.parts.length && lastSegment.parts[lastSegment.parts.length - 1];\n if (lastSegmentLastPart && lastSegmentLastPart.independent) {\n next.mediaIndex -= 1;\n next.partIndex = lastSegment.parts.length - 1;\n next.independent = 'previous segment';\n }\n } else if (nextSegment.parts[next.partIndex - 1].independent) {\n next.partIndex -= 1;\n next.independent = 'previous part';\n }\n }\n const ended = this.mediaSource_ && this.mediaSource_.readyState === 'ended'; // do not choose a next segment if all of the following:\n // 1. this is the last segment in the playlist\n // 2. end of stream has been called on the media source already\n // 3. the player is not seeking\n\n if (next.mediaIndex >= segments.length - 1 && ended && !this.seeking_()) {\n return null;\n }\n return this.generateSegmentInfo_(next);\n }\n generateSegmentInfo_(options) {\n const {\n independent,\n playlist,\n mediaIndex,\n startOfSegment,\n isSyncRequest,\n partIndex,\n forceTimestampOffset,\n getMediaInfoForTime\n } = options;\n const segment = playlist.segments[mediaIndex];\n const part = typeof partIndex === 'number' && segment.parts[partIndex];\n const segmentInfo = {\n requestId: 'segment-loader-' + Math.random(),\n // resolve the segment URL relative to the playlist\n uri: part && part.resolvedUri || segment.resolvedUri,\n // the segment's mediaIndex at the time it was requested\n mediaIndex,\n partIndex: part ? partIndex : null,\n // whether or not to update the SegmentLoader's state with this\n // segment's mediaIndex\n isSyncRequest,\n startOfSegment,\n // the segment's playlist\n playlist,\n // unencrypted bytes of the segment\n bytes: null,\n // when a key is defined for this segment, the encrypted bytes\n encryptedBytes: null,\n // The target timestampOffset for this segment when we append it\n // to the source buffer\n timestampOffset: null,\n // The timeline that the segment is in\n timeline: segment.timeline,\n // The expected duration of the segment in seconds\n duration: part && part.duration || segment.duration,\n // retain the segment in case the playlist updates while doing an async process\n segment,\n part,\n byteLength: 0,\n transmuxer: this.transmuxer_,\n // type of getMediaInfoForTime that was used to get this segment\n getMediaInfoForTime,\n independent\n };\n const overrideCheck = typeof forceTimestampOffset !== 'undefined' ? forceTimestampOffset : this.isPendingTimestampOffset_;\n segmentInfo.timestampOffset = this.timestampOffsetForSegment_({\n segmentTimeline: segment.timeline,\n currentTimeline: this.currentTimeline_,\n startOfSegment,\n buffered: this.buffered_(),\n overrideCheck\n });\n const audioBufferedEnd = lastBufferedEnd(this.sourceUpdater_.audioBuffered());\n if (typeof audioBufferedEnd === 'number') {\n // since the transmuxer is using the actual timing values, but the buffer is\n // adjusted by the timestamp offset, we must adjust the value here\n segmentInfo.audioAppendStart = audioBufferedEnd - this.sourceUpdater_.audioTimestampOffset();\n }\n if (this.sourceUpdater_.videoBuffered().length) {\n segmentInfo.gopsToAlignWith = gopsSafeToAlignWith(this.gopBuffer_,\n // since the transmuxer is using the actual timing values, but the time is\n // adjusted by the timestmap offset, we must adjust the value here\n this.currentTime_() - this.sourceUpdater_.videoTimestampOffset(), this.timeMapping_);\n }\n return segmentInfo;\n } // get the timestampoffset for a segment,\n // added so that vtt segment loader can override and prevent\n // adding timestamp offsets.\n\n timestampOffsetForSegment_(options) {\n return timestampOffsetForSegment(options);\n }\n /**\n * Determines if the network has enough bandwidth to complete the current segment\n * request in a timely manner. If not, the request will be aborted early and bandwidth\n * updated to trigger a playlist switch.\n *\n * @param {Object} stats\n * Object containing stats about the request timing and size\n * @private\n */\n\n earlyAbortWhenNeeded_(stats) {\n if (this.vhs_.tech_.paused() ||\n // Don't abort if the current playlist is on the lowestEnabledRendition\n // TODO: Replace using timeout with a boolean indicating whether this playlist is\n // the lowestEnabledRendition.\n !this.xhrOptions_.timeout ||\n // Don't abort if we have no bandwidth information to estimate segment sizes\n !this.playlist_.attributes.BANDWIDTH) {\n return;\n } // Wait at least 1 second since the first byte of data has been received before\n // using the calculated bandwidth from the progress event to allow the bitrate\n // to stabilize\n\n if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n return;\n }\n const currentTime = this.currentTime_();\n const measuredBandwidth = stats.bandwidth;\n const segmentDuration = this.pendingSegment_.duration;\n const requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n // if we are only left with less than 1 second when the request completes.\n // A negative timeUntilRebuffering indicates we are already rebuffering\n\n const timeUntilRebuffer$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.vhs_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download\n // is larger than the estimated time until the player runs out of forward buffer\n\n if (requestTimeRemaining <= timeUntilRebuffer$1) {\n return;\n }\n const switchCandidate = minRebufferMaxBandwidthSelector({\n main: this.vhs_.playlists.main,\n currentTime,\n bandwidth: measuredBandwidth,\n duration: this.duration_(),\n segmentDuration,\n timeUntilRebuffer: timeUntilRebuffer$1,\n currentTimeline: this.currentTimeline_,\n syncController: this.syncController_\n });\n if (!switchCandidate) {\n return;\n }\n const rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$1;\n const timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n let minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the\n // potential round trip time of the new request so that we are not too aggressive\n // with switching to a playlist that might save us a fraction of a second.\n\n if (timeUntilRebuffer$1 <= TIME_FUDGE_FACTOR) {\n minimumTimeSaving = 1;\n }\n if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n return;\n } // set the bandwidth to that of the desired playlist being sure to scale by\n // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n // don't trigger a bandwidthupdate as the bandwidth is artifial\n\n this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;\n this.trigger('earlyabort');\n }\n handleAbort_(segmentInfo) {\n this.logger_(`Aborting ${segmentInfoString(segmentInfo)}`);\n this.mediaRequestsAborted += 1;\n }\n /**\n * XHR `progress` event handler\n *\n * @param {Event}\n * The XHR `progress` event\n * @param {Object} simpleSegment\n * A simplified segment object copy\n * @private\n */\n\n handleProgress_(event, simpleSegment) {\n this.earlyAbortWhenNeeded_(simpleSegment.stats);\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n }\n this.trigger('progress');\n }\n handleTrackInfo_(simpleSegment, trackInfo) {\n this.earlyAbortWhenNeeded_(simpleSegment.stats);\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n }\n if (this.checkForIllegalMediaSwitch(trackInfo)) {\n return;\n }\n trackInfo = trackInfo || {}; // When we have track info, determine what media types this loader is dealing with.\n // Guard against cases where we're not getting track info at all until we are\n // certain that all streams will provide it.\n\n if (!shallowEqual(this.currentMediaInfo_, trackInfo)) {\n this.appendInitSegment_ = {\n audio: true,\n video: true\n };\n this.startingMediaInfo_ = trackInfo;\n this.currentMediaInfo_ = trackInfo;\n this.logger_('trackinfo update', trackInfo);\n this.trigger('trackinfo');\n } // trackinfo may cause an abort if the trackinfo\n // causes a codec change to an unsupported codec.\n\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n } // set trackinfo on the pending segment so that\n // it can append.\n\n this.pendingSegment_.trackInfo = trackInfo; // check if any calls were waiting on the track info\n\n if (this.hasEnoughInfoToAppend_()) {\n this.processCallQueue_();\n }\n }\n handleTimingInfo_(simpleSegment, mediaType, timeType, time) {\n this.earlyAbortWhenNeeded_(simpleSegment.stats);\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n }\n const segmentInfo = this.pendingSegment_;\n const timingInfoProperty = timingInfoPropertyForMedia(mediaType);\n segmentInfo[timingInfoProperty] = segmentInfo[timingInfoProperty] || {};\n segmentInfo[timingInfoProperty][timeType] = time;\n this.logger_(`timinginfo: ${mediaType} - ${timeType} - ${time}`); // check if any calls were waiting on the timing info\n\n if (this.hasEnoughInfoToAppend_()) {\n this.processCallQueue_();\n }\n }\n handleCaptions_(simpleSegment, captionData) {\n this.earlyAbortWhenNeeded_(simpleSegment.stats);\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n } // This could only happen with fmp4 segments, but\n // should still not happen in general\n\n if (captionData.length === 0) {\n this.logger_('SegmentLoader received no captions from a caption event');\n return;\n }\n const segmentInfo = this.pendingSegment_; // Wait until we have some video data so that caption timing\n // can be adjusted by the timestamp offset\n\n if (!segmentInfo.hasAppendedData_) {\n this.metadataQueue_.caption.push(this.handleCaptions_.bind(this, simpleSegment, captionData));\n return;\n }\n const timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset();\n const captionTracks = {}; // get total start/end and captions for each track/stream\n\n captionData.forEach(caption => {\n // caption.stream is actually a track name...\n // set to the existing values in tracks or default values\n captionTracks[caption.stream] = captionTracks[caption.stream] || {\n // Infinity, as any other value will be less than this\n startTime: Infinity,\n captions: [],\n // 0 as an other value will be more than this\n endTime: 0\n };\n const captionTrack = captionTracks[caption.stream];\n captionTrack.startTime = Math.min(captionTrack.startTime, caption.startTime + timestampOffset);\n captionTrack.endTime = Math.max(captionTrack.endTime, caption.endTime + timestampOffset);\n captionTrack.captions.push(caption);\n });\n Object.keys(captionTracks).forEach(trackName => {\n const {\n startTime,\n endTime,\n captions\n } = captionTracks[trackName];\n const inbandTextTracks = this.inbandTextTracks_;\n this.logger_(`adding cues from ${startTime} -> ${endTime} for ${trackName}`);\n createCaptionsTrackIfNotExists(inbandTextTracks, this.vhs_.tech_, trackName); // clear out any cues that start and end at the same time period for the same track.\n // We do this because a rendition change that also changes the timescale for captions\n // will result in captions being re-parsed for certain segments. If we add them again\n // without clearing we will have two of the same captions visible.\n\n removeCuesFromTrack(startTime, endTime, inbandTextTracks[trackName]);\n addCaptionData({\n captionArray: captions,\n inbandTextTracks,\n timestampOffset\n });\n }); // Reset stored captions since we added parsed\n // captions to a text track at this point\n\n if (this.transmuxer_) {\n this.transmuxer_.postMessage({\n action: 'clearParsedMp4Captions'\n });\n }\n }\n handleId3_(simpleSegment, id3Frames, dispatchType) {\n this.earlyAbortWhenNeeded_(simpleSegment.stats);\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n }\n const segmentInfo = this.pendingSegment_; // we need to have appended data in order for the timestamp offset to be set\n\n if (!segmentInfo.hasAppendedData_) {\n this.metadataQueue_.id3.push(this.handleId3_.bind(this, simpleSegment, id3Frames, dispatchType));\n return;\n }\n const timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset(); // There's potentially an issue where we could double add metadata if there's a muxed\n // audio/video source with a metadata track, and an alt audio with a metadata track.\n // However, this probably won't happen, and if it does it can be handled then.\n\n createMetadataTrackIfNotExists(this.inbandTextTracks_, dispatchType, this.vhs_.tech_);\n addMetadata({\n inbandTextTracks: this.inbandTextTracks_,\n metadataArray: id3Frames,\n timestampOffset,\n videoDuration: this.duration_()\n });\n }\n processMetadataQueue_() {\n this.metadataQueue_.id3.forEach(fn => fn());\n this.metadataQueue_.caption.forEach(fn => fn());\n this.metadataQueue_.id3 = [];\n this.metadataQueue_.caption = [];\n }\n processCallQueue_() {\n const callQueue = this.callQueue_; // Clear out the queue before the queued functions are run, since some of the\n // functions may check the length of the load queue and default to pushing themselves\n // back onto the queue.\n\n this.callQueue_ = [];\n callQueue.forEach(fun => fun());\n }\n processLoadQueue_() {\n const loadQueue = this.loadQueue_; // Clear out the queue before the queued functions are run, since some of the\n // functions may check the length of the load queue and default to pushing themselves\n // back onto the queue.\n\n this.loadQueue_ = [];\n loadQueue.forEach(fun => fun());\n }\n /**\n * Determines whether the loader has enough info to load the next segment.\n *\n * @return {boolean}\n * Whether or not the loader has enough info to load the next segment\n */\n\n hasEnoughInfoToLoad_() {\n // Since primary timing goes by video, only the audio loader potentially needs to wait\n // to load.\n if (this.loaderType_ !== 'audio') {\n return true;\n }\n const segmentInfo = this.pendingSegment_; // A fill buffer must have already run to establish a pending segment before there's\n // enough info to load.\n\n if (!segmentInfo) {\n return false;\n } // The first segment can and should be loaded immediately so that source buffers are\n // created together (before appending). Source buffer creation uses the presence of\n // audio and video data to determine whether to create audio/video source buffers, and\n // uses processed (transmuxed or parsed) media to determine the types required.\n\n if (!this.getCurrentMediaInfo_()) {\n return true;\n }\n if (\n // Technically, instead of waiting to load a segment on timeline changes, a segment\n // can be requested and downloaded and only wait before it is transmuxed or parsed.\n // But in practice, there are a few reasons why it is better to wait until a loader\n // is ready to append that segment before requesting and downloading:\n //\n // 1. Because audio and main loaders cross discontinuities together, if this loader\n // is waiting for the other to catch up, then instead of requesting another\n // segment and using up more bandwidth, by not yet loading, more bandwidth is\n // allotted to the loader currently behind.\n // 2. media-segment-request doesn't have to have logic to consider whether a segment\n // is ready to be processed or not, isolating the queueing behavior to the loader.\n // 3. The audio loader bases some of its segment properties on timing information\n // provided by the main loader, meaning that, if the logic for waiting on\n // processing was in media-segment-request, then it would also need to know how\n // to re-generate the segment information after the main loader caught up.\n shouldWaitForTimelineChange({\n timelineChangeController: this.timelineChangeController_,\n currentTimeline: this.currentTimeline_,\n segmentTimeline: segmentInfo.timeline,\n loaderType: this.loaderType_,\n audioDisabled: this.audioDisabled_\n })) {\n return false;\n }\n return true;\n }\n getCurrentMediaInfo_(segmentInfo = this.pendingSegment_) {\n return segmentInfo && segmentInfo.trackInfo || this.currentMediaInfo_;\n }\n getMediaInfo_(segmentInfo = this.pendingSegment_) {\n return this.getCurrentMediaInfo_(segmentInfo) || this.startingMediaInfo_;\n }\n getPendingSegmentPlaylist() {\n return this.pendingSegment_ ? this.pendingSegment_.playlist : null;\n }\n hasEnoughInfoToAppend_() {\n if (!this.sourceUpdater_.ready()) {\n return false;\n } // If content needs to be removed or the loader is waiting on an append reattempt,\n // then no additional content should be appended until the prior append is resolved.\n\n if (this.waitingOnRemove_ || this.quotaExceededErrorRetryTimeout_) {\n return false;\n }\n const segmentInfo = this.pendingSegment_;\n const trackInfo = this.getCurrentMediaInfo_(); // no segment to append any data for or\n // we do not have information on this specific\n // segment yet\n\n if (!segmentInfo || !trackInfo) {\n return false;\n }\n const {\n hasAudio,\n hasVideo,\n isMuxed\n } = trackInfo;\n if (hasVideo && !segmentInfo.videoTimingInfo) {\n return false;\n } // muxed content only relies on video timing information for now.\n\n if (hasAudio && !this.audioDisabled_ && !isMuxed && !segmentInfo.audioTimingInfo) {\n return false;\n }\n if (shouldWaitForTimelineChange({\n timelineChangeController: this.timelineChangeController_,\n currentTimeline: this.currentTimeline_,\n segmentTimeline: segmentInfo.timeline,\n loaderType: this.loaderType_,\n audioDisabled: this.audioDisabled_\n })) {\n return false;\n }\n return true;\n }\n handleData_(simpleSegment, result) {\n this.earlyAbortWhenNeeded_(simpleSegment.stats);\n if (this.checkForAbort_(simpleSegment.requestId)) {\n return;\n } // If there's anything in the call queue, then this data came later and should be\n // executed after the calls currently queued.\n\n if (this.callQueue_.length || !this.hasEnoughInfoToAppend_()) {\n this.callQueue_.push(this.handleData_.bind(this, simpleSegment, result));\n return;\n }\n const segmentInfo = this.pendingSegment_; // update the time mapping so we can translate from display time to media time\n\n this.setTimeMapping_(segmentInfo.timeline); // for tracking overall stats\n\n this.updateMediaSecondsLoaded_(segmentInfo.part || segmentInfo.segment); // Note that the state isn't changed from loading to appending. This is because abort\n // logic may change behavior depending on the state, and changing state too early may\n // inflate our estimates of bandwidth. In the future this should be re-examined to\n // note more granular states.\n // don't process and append data if the mediaSource is closed\n\n if (this.mediaSource_.readyState === 'closed') {\n return;\n } // if this request included an initialization segment, save that data\n // to the initSegment cache\n\n if (simpleSegment.map) {\n simpleSegment.map = this.initSegmentForMap(simpleSegment.map, true); // move over init segment properties to media request\n\n segmentInfo.segment.map = simpleSegment.map;\n } // if this request included a segment key, save that data in the cache\n\n if (simpleSegment.key) {\n this.segmentKey(simpleSegment.key, true);\n }\n segmentInfo.isFmp4 = simpleSegment.isFmp4;\n segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n if (segmentInfo.isFmp4) {\n this.trigger('fmp4');\n segmentInfo.timingInfo.start = segmentInfo[timingInfoPropertyForMedia(result.type)].start;\n } else {\n const trackInfo = this.getCurrentMediaInfo_();\n const useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n let firstVideoFrameTimeForData;\n if (useVideoTimingInfo) {\n firstVideoFrameTimeForData = segmentInfo.videoTimingInfo.start;\n } // Segment loader knows more about segment timing than the transmuxer (in certain\n // aspects), so make any changes required for a more accurate start time.\n // Don't set the end time yet, as the segment may not be finished processing.\n\n segmentInfo.timingInfo.start = this.trueSegmentStart_({\n currentStart: segmentInfo.timingInfo.start,\n playlist: segmentInfo.playlist,\n mediaIndex: segmentInfo.mediaIndex,\n currentVideoTimestampOffset: this.sourceUpdater_.videoTimestampOffset(),\n useVideoTimingInfo,\n firstVideoFrameTimeForData,\n videoTimingInfo: segmentInfo.videoTimingInfo,\n audioTimingInfo: segmentInfo.audioTimingInfo\n });\n } // Init segments for audio and video only need to be appended in certain cases. Now\n // that data is about to be appended, we can check the final cases to determine\n // whether we should append an init segment.\n\n this.updateAppendInitSegmentStatus(segmentInfo, result.type); // Timestamp offset should be updated once we get new data and have its timing info,\n // as we use the start of the segment to offset the best guess (playlist provided)\n // timestamp offset.\n\n this.updateSourceBufferTimestampOffset_(segmentInfo); // if this is a sync request we need to determine whether it should\n // be appended or not.\n\n if (segmentInfo.isSyncRequest) {\n // first save/update our timing info for this segment.\n // this is what allows us to choose an accurate segment\n // and the main reason we make a sync request.\n this.updateTimingInfoEnd_(segmentInfo);\n this.syncController_.saveSegmentTimingInfo({\n segmentInfo,\n shouldSaveTimelineMapping: this.loaderType_ === 'main'\n });\n const next = this.chooseNextRequest_(); // If the sync request isn't the segment that would be requested next\n // after taking into account its timing info, do not append it.\n\n if (next.mediaIndex !== segmentInfo.mediaIndex || next.partIndex !== segmentInfo.partIndex) {\n this.logger_('sync segment was incorrect, not appending');\n return;\n } // otherwise append it like any other segment as our guess was correct.\n\n this.logger_('sync segment was correct, appending');\n } // Save some state so that in the future anything waiting on first append (and/or\n // timestamp offset(s)) can process immediately. While the extra state isn't optimal,\n // we need some notion of whether the timestamp offset or other relevant information\n // has had a chance to be set.\n\n segmentInfo.hasAppendedData_ = true; // Now that the timestamp offset should be set, we can append any waiting ID3 tags.\n\n this.processMetadataQueue_();\n this.appendData_(segmentInfo, result);\n }\n updateAppendInitSegmentStatus(segmentInfo, type) {\n // alt audio doesn't manage timestamp offset\n if (this.loaderType_ === 'main' && typeof segmentInfo.timestampOffset === 'number' &&\n // in the case that we're handling partial data, we don't want to append an init\n // segment for each chunk\n !segmentInfo.changedTimestampOffset) {\n // if the timestamp offset changed, the timeline may have changed, so we have to re-\n // append init segments\n this.appendInitSegment_ = {\n audio: true,\n video: true\n };\n }\n if (this.playlistOfLastInitSegment_[type] !== segmentInfo.playlist) {\n // make sure we append init segment on playlist changes, in case the media config\n // changed\n this.appendInitSegment_[type] = true;\n }\n }\n getInitSegmentAndUpdateState_({\n type,\n initSegment,\n map,\n playlist\n }) {\n // \"The EXT-X-MAP tag specifies how to obtain the Media Initialization Section\n // (Section 3) required to parse the applicable Media Segments. It applies to every\n // Media Segment that appears after it in the Playlist until the next EXT-X-MAP tag\n // or until the end of the playlist.\"\n // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.5\n if (map) {\n const id = initSegmentId(map);\n if (this.activeInitSegmentId_ === id) {\n // don't need to re-append the init segment if the ID matches\n return null;\n } // a map-specified init segment takes priority over any transmuxed (or otherwise\n // obtained) init segment\n //\n // this also caches the init segment for later use\n\n initSegment = this.initSegmentForMap(map, true).bytes;\n this.activeInitSegmentId_ = id;\n } // We used to always prepend init segments for video, however, that shouldn't be\n // necessary. Instead, we should only append on changes, similar to what we've always\n // done for audio. This is more important (though may not be that important) for\n // frame-by-frame appending for LHLS, simply because of the increased quantity of\n // appends.\n\n if (initSegment && this.appendInitSegment_[type]) {\n // Make sure we track the playlist that we last used for the init segment, so that\n // we can re-append the init segment in the event that we get data from a new\n // playlist. Discontinuities and track changes are handled in other sections.\n this.playlistOfLastInitSegment_[type] = playlist; // Disable future init segment appends for this type. Until a change is necessary.\n\n this.appendInitSegment_[type] = false; // we need to clear out the fmp4 active init segment id, since\n // we are appending the muxer init segment\n\n this.activeInitSegmentId_ = null;\n return initSegment;\n }\n return null;\n }\n handleQuotaExceededError_({\n segmentInfo,\n type,\n bytes\n }, error) {\n const audioBuffered = this.sourceUpdater_.audioBuffered();\n const videoBuffered = this.sourceUpdater_.videoBuffered(); // For now we're ignoring any notion of gaps in the buffer, but they, in theory,\n // should be cleared out during the buffer removals. However, log in case it helps\n // debug.\n\n if (audioBuffered.length > 1) {\n this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: ' + timeRangesToArray(audioBuffered).join(', '));\n }\n if (videoBuffered.length > 1) {\n this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: ' + timeRangesToArray(videoBuffered).join(', '));\n }\n const audioBufferStart = audioBuffered.length ? audioBuffered.start(0) : 0;\n const audioBufferEnd = audioBuffered.length ? audioBuffered.end(audioBuffered.length - 1) : 0;\n const videoBufferStart = videoBuffered.length ? videoBuffered.start(0) : 0;\n const videoBufferEnd = videoBuffered.length ? videoBuffered.end(videoBuffered.length - 1) : 0;\n if (audioBufferEnd - audioBufferStart <= MIN_BACK_BUFFER && videoBufferEnd - videoBufferStart <= MIN_BACK_BUFFER) {\n // Can't remove enough buffer to make room for new segment (or the browser doesn't\n // allow for appends of segments this size). In the future, it may be possible to\n // split up the segment and append in pieces, but for now, error out this playlist\n // in an attempt to switch to a more manageable rendition.\n this.logger_('On QUOTA_EXCEEDED_ERR, single segment too large to append to ' + 'buffer, triggering an error. ' + `Appended byte length: ${bytes.byteLength}, ` + `audio buffer: ${timeRangesToArray(audioBuffered).join(', ')}, ` + `video buffer: ${timeRangesToArray(videoBuffered).join(', ')}, `);\n this.error({\n message: 'Quota exceeded error with append of a single segment of content',\n excludeUntil: Infinity\n });\n this.trigger('error');\n return;\n } // To try to resolve the quota exceeded error, clear back buffer and retry. This means\n // that the segment-loader should block on future events until this one is handled, so\n // that it doesn't keep moving onto further segments. Adding the call to the call\n // queue will prevent further appends until waitingOnRemove_ and\n // quotaExceededErrorRetryTimeout_ are cleared.\n //\n // Note that this will only block the current loader. In the case of demuxed content,\n // the other load may keep filling as fast as possible. In practice, this should be\n // OK, as it is a rare case when either audio has a high enough bitrate to fill up a\n // source buffer, or video fills without enough room for audio to append (and without\n // the availability of clearing out seconds of back buffer to make room for audio).\n // But it might still be good to handle this case in the future as a TODO.\n\n this.waitingOnRemove_ = true;\n this.callQueue_.push(this.appendToSourceBuffer_.bind(this, {\n segmentInfo,\n type,\n bytes\n }));\n const currentTime = this.currentTime_(); // Try to remove as much audio and video as possible to make room for new content\n // before retrying.\n\n const timeToRemoveUntil = currentTime - MIN_BACK_BUFFER;\n this.logger_(`On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to ${timeToRemoveUntil}`);\n this.remove(0, timeToRemoveUntil, () => {\n this.logger_(`On QUOTA_EXCEEDED_ERR, retrying append in ${MIN_BACK_BUFFER}s`);\n this.waitingOnRemove_ = false; // wait the length of time alotted in the back buffer to prevent wasted\n // attempts (since we can't clear less than the minimum)\n\n this.quotaExceededErrorRetryTimeout_ = window.setTimeout(() => {\n this.logger_('On QUOTA_EXCEEDED_ERR, re-processing call queue');\n this.quotaExceededErrorRetryTimeout_ = null;\n this.processCallQueue_();\n }, MIN_BACK_BUFFER * 1000);\n }, true);\n }\n handleAppendError_({\n segmentInfo,\n type,\n bytes\n }, error) {\n // if there's no error, nothing to do\n if (!error) {\n return;\n }\n if (error.code === QUOTA_EXCEEDED_ERR) {\n this.handleQuotaExceededError_({\n segmentInfo,\n type,\n bytes\n }); // A quota exceeded error should be recoverable with a future re-append, so no need\n // to trigger an append error.\n\n return;\n }\n this.logger_('Received non QUOTA_EXCEEDED_ERR on append', error);\n this.error(`${type} append of ${bytes.length}b failed for segment ` + `#${segmentInfo.mediaIndex} in playlist ${segmentInfo.playlist.id}`); // If an append errors, we often can't recover.\n // (see https://w3c.github.io/media-source/#sourcebuffer-append-error).\n //\n // Trigger a special error so that it can be handled separately from normal,\n // recoverable errors.\n\n this.trigger('appenderror');\n }\n appendToSourceBuffer_({\n segmentInfo,\n type,\n initSegment,\n data,\n bytes\n }) {\n // If this is a re-append, bytes were already created and don't need to be recreated\n if (!bytes) {\n const segments = [data];\n let byteLength = data.byteLength;\n if (initSegment) {\n // if the media initialization segment is changing, append it before the content\n // segment\n segments.unshift(initSegment);\n byteLength += initSegment.byteLength;\n } // Technically we should be OK appending the init segment separately, however, we\n // haven't yet tested that, and prepending is how we have always done things.\n\n bytes = concatSegments({\n bytes: byteLength,\n segments\n });\n }\n this.sourceUpdater_.appendBuffer({\n segmentInfo,\n type,\n bytes\n }, this.handleAppendError_.bind(this, {\n segmentInfo,\n type,\n bytes\n }));\n }\n handleSegmentTimingInfo_(type, requestId, segmentTimingInfo) {\n if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {\n return;\n }\n const segment = this.pendingSegment_.segment;\n const timingInfoProperty = `${type}TimingInfo`;\n if (!segment[timingInfoProperty]) {\n segment[timingInfoProperty] = {};\n }\n segment[timingInfoProperty].transmuxerPrependedSeconds = segmentTimingInfo.prependedContentDuration || 0;\n segment[timingInfoProperty].transmuxedPresentationStart = segmentTimingInfo.start.presentation;\n segment[timingInfoProperty].transmuxedDecodeStart = segmentTimingInfo.start.decode;\n segment[timingInfoProperty].transmuxedPresentationEnd = segmentTimingInfo.end.presentation;\n segment[timingInfoProperty].transmuxedDecodeEnd = segmentTimingInfo.end.decode; // mainly used as a reference for debugging\n\n segment[timingInfoProperty].baseMediaDecodeTime = segmentTimingInfo.baseMediaDecodeTime;\n }\n appendData_(segmentInfo, result) {\n const {\n type,\n data\n } = result;\n if (!data || !data.byteLength) {\n return;\n }\n if (type === 'audio' && this.audioDisabled_) {\n return;\n }\n const initSegment = this.getInitSegmentAndUpdateState_({\n type,\n initSegment: result.initSegment,\n playlist: segmentInfo.playlist,\n map: segmentInfo.isFmp4 ? segmentInfo.segment.map : null\n });\n this.appendToSourceBuffer_({\n segmentInfo,\n type,\n initSegment,\n data\n });\n }\n /**\n * load a specific segment from a request into the buffer\n *\n * @private\n */\n\n loadSegment_(segmentInfo) {\n this.state = 'WAITING';\n this.pendingSegment_ = segmentInfo;\n this.trimBackBuffer_(segmentInfo);\n if (typeof segmentInfo.timestampOffset === 'number') {\n if (this.transmuxer_) {\n this.transmuxer_.postMessage({\n action: 'clearAllMp4Captions'\n });\n }\n }\n if (!this.hasEnoughInfoToLoad_()) {\n this.loadQueue_.push(() => {\n // regenerate the audioAppendStart, timestampOffset, etc as they\n // may have changed since this function was added to the queue.\n const options = _extends$1({}, segmentInfo, {\n forceTimestampOffset: true\n });\n _extends$1(segmentInfo, this.generateSegmentInfo_(options));\n this.isPendingTimestampOffset_ = false;\n this.updateTransmuxerAndRequestSegment_(segmentInfo);\n });\n return;\n }\n this.updateTransmuxerAndRequestSegment_(segmentInfo);\n }\n updateTransmuxerAndRequestSegment_(segmentInfo) {\n // We'll update the source buffer's timestamp offset once we have transmuxed data, but\n // the transmuxer still needs to be updated before then.\n //\n // Even though keepOriginalTimestamps is set to true for the transmuxer, timestamp\n // offset must be passed to the transmuxer for stream correcting adjustments.\n if (this.shouldUpdateTransmuxerTimestampOffset_(segmentInfo.timestampOffset)) {\n this.gopBuffer_.length = 0; // gopsToAlignWith was set before the GOP buffer was cleared\n\n segmentInfo.gopsToAlignWith = [];\n this.timeMapping_ = 0; // reset values in the transmuxer since a discontinuity should start fresh\n\n this.transmuxer_.postMessage({\n action: 'reset'\n });\n this.transmuxer_.postMessage({\n action: 'setTimestampOffset',\n timestampOffset: segmentInfo.timestampOffset\n });\n }\n const simpleSegment = this.createSimplifiedSegmentObj_(segmentInfo);\n const isEndOfStream = this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex);\n const isWalkingForward = this.mediaIndex !== null;\n const isDiscontinuity = segmentInfo.timeline !== this.currentTimeline_ &&\n // currentTimeline starts at -1, so we shouldn't end the timeline switching to 0,\n // the first timeline\n segmentInfo.timeline > 0;\n const isEndOfTimeline = isEndOfStream || isWalkingForward && isDiscontinuity;\n this.logger_(`Requesting ${segmentInfoString(segmentInfo)}`); // If there's an init segment associated with this segment, but it is not cached (identified by a lack of bytes),\n // then this init segment has never been seen before and should be appended.\n //\n // At this point the content type (audio/video or both) is not yet known, but it should be safe to set\n // both to true and leave the decision of whether to append the init segment to append time.\n\n if (simpleSegment.map && !simpleSegment.map.bytes) {\n this.logger_('going to request init segment.');\n this.appendInitSegment_ = {\n video: true,\n audio: true\n };\n }\n segmentInfo.abortRequests = mediaSegmentRequest({\n xhr: this.vhs_.xhr,\n xhrOptions: this.xhrOptions_,\n decryptionWorker: this.decrypter_,\n segment: simpleSegment,\n abortFn: this.handleAbort_.bind(this, segmentInfo),\n progressFn: this.handleProgress_.bind(this),\n trackInfoFn: this.handleTrackInfo_.bind(this),\n timingInfoFn: this.handleTimingInfo_.bind(this),\n videoSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'video', segmentInfo.requestId),\n audioSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'audio', segmentInfo.requestId),\n captionsFn: this.handleCaptions_.bind(this),\n isEndOfTimeline,\n endedTimelineFn: () => {\n this.logger_('received endedtimeline callback');\n },\n id3Fn: this.handleId3_.bind(this),\n dataFn: this.handleData_.bind(this),\n doneFn: this.segmentRequestFinished_.bind(this),\n onTransmuxerLog: ({\n message,\n level,\n stream\n }) => {\n this.logger_(`${segmentInfoString(segmentInfo)} logged from transmuxer stream ${stream} as a ${level}: ${message}`);\n }\n });\n }\n /**\n * trim the back buffer so that we don't have too much data\n * in the source buffer\n *\n * @private\n *\n * @param {Object} segmentInfo - the current segment\n */\n\n trimBackBuffer_(segmentInfo) {\n const removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of\n // buffer and a very conservative \"garbage collector\"\n // We manually clear out the old buffer to ensure\n // we don't trigger the QuotaExceeded error\n // on the source buffer during subsequent appends\n\n if (removeToTime > 0) {\n this.remove(0, removeToTime);\n }\n }\n /**\n * created a simplified copy of the segment object with just the\n * information necessary to perform the XHR and decryption\n *\n * @private\n *\n * @param {Object} segmentInfo - the current segment\n * @return {Object} a simplified segment object copy\n */\n\n createSimplifiedSegmentObj_(segmentInfo) {\n const segment = segmentInfo.segment;\n const part = segmentInfo.part;\n const simpleSegment = {\n resolvedUri: part ? part.resolvedUri : segment.resolvedUri,\n byterange: part ? part.byterange : segment.byterange,\n requestId: segmentInfo.requestId,\n transmuxer: segmentInfo.transmuxer,\n audioAppendStart: segmentInfo.audioAppendStart,\n gopsToAlignWith: segmentInfo.gopsToAlignWith,\n part: segmentInfo.part\n };\n const previousSegment = segmentInfo.playlist.segments[segmentInfo.mediaIndex - 1];\n if (previousSegment && previousSegment.timeline === segment.timeline) {\n // The baseStartTime of a segment is used to handle rollover when probing the TS\n // segment to retrieve timing information. Since the probe only looks at the media's\n // times (e.g., PTS and DTS values of the segment), and doesn't consider the\n // player's time (e.g., player.currentTime()), baseStartTime should reflect the\n // media time as well. transmuxedDecodeEnd represents the end time of a segment, in\n // seconds of media time, so should be used here. The previous segment is used since\n // the end of the previous segment should represent the beginning of the current\n // segment, so long as they are on the same timeline.\n if (previousSegment.videoTimingInfo) {\n simpleSegment.baseStartTime = previousSegment.videoTimingInfo.transmuxedDecodeEnd;\n } else if (previousSegment.audioTimingInfo) {\n simpleSegment.baseStartTime = previousSegment.audioTimingInfo.transmuxedDecodeEnd;\n }\n }\n if (segment.key) {\n // if the media sequence is greater than 2^32, the IV will be incorrect\n // assuming 10s segments, that would be about 1300 years\n const iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n simpleSegment.key = this.segmentKey(segment.key);\n simpleSegment.key.iv = iv;\n }\n if (segment.map) {\n simpleSegment.map = this.initSegmentForMap(segment.map);\n }\n return simpleSegment;\n }\n saveTransferStats_(stats) {\n // every request counts as a media request even if it has been aborted\n // or canceled due to a timeout\n this.mediaRequests += 1;\n if (stats) {\n this.mediaBytesTransferred += stats.bytesReceived;\n this.mediaTransferDuration += stats.roundTripTime;\n }\n }\n saveBandwidthRelatedStats_(duration, stats) {\n // byteLength will be used for throughput, and should be based on bytes receieved,\n // which we only know at the end of the request and should reflect total bytes\n // downloaded rather than just bytes processed from components of the segment\n this.pendingSegment_.byteLength = stats.bytesReceived;\n if (duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n this.logger_(`Ignoring segment's bandwidth because its duration of ${duration}` + ` is less than the min to record ${MIN_SEGMENT_DURATION_TO_SAVE_STATS}`);\n return;\n }\n this.bandwidth = stats.bandwidth;\n this.roundTrip = stats.roundTripTime;\n }\n handleTimeout_() {\n // although the VTT segment loader bandwidth isn't really used, it's good to\n // maintain functinality between segment loaders\n this.mediaRequestsTimedout += 1;\n this.bandwidth = 1;\n this.roundTrip = NaN;\n this.trigger('bandwidthupdate');\n this.trigger('timeout');\n }\n /**\n * Handle the callback from the segmentRequest function and set the\n * associated SegmentLoader state and errors if necessary\n *\n * @private\n */\n\n segmentRequestFinished_(error, simpleSegment, result) {\n // TODO handle special cases, e.g., muxed audio/video but only audio in the segment\n // check the call queue directly since this function doesn't need to deal with any\n // data, and can continue even if the source buffers are not set up and we didn't get\n // any data from the segment\n if (this.callQueue_.length) {\n this.callQueue_.push(this.segmentRequestFinished_.bind(this, error, simpleSegment, result));\n return;\n }\n this.saveTransferStats_(simpleSegment.stats); // The request was aborted and the SegmentLoader has already been reset\n\n if (!this.pendingSegment_) {\n return;\n } // the request was aborted and the SegmentLoader has already started\n // another request. this can happen when the timeout for an aborted\n // request triggers due to a limitation in the XHR library\n // do not count this as any sort of request or we risk double-counting\n\n if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n return;\n } // an error occurred from the active pendingSegment_ so reset everything\n\n if (error) {\n this.pendingSegment_ = null;\n this.state = 'READY'; // aborts are not a true error condition and nothing corrective needs to be done\n\n if (error.code === REQUEST_ERRORS.ABORTED) {\n return;\n }\n this.pause(); // the error is really just that at least one of the requests timed-out\n // set the bandwidth to a very low value and trigger an ABR switch to\n // take emergency action\n\n if (error.code === REQUEST_ERRORS.TIMEOUT) {\n this.handleTimeout_();\n return;\n } // if control-flow has arrived here, then the error is real\n // emit an error event to exclude the current playlist\n\n this.mediaRequestsErrored += 1;\n this.error(error);\n this.trigger('error');\n return;\n }\n const segmentInfo = this.pendingSegment_; // the response was a success so set any bandwidth stats the request\n // generated for ABR purposes\n\n this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);\n segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;\n if (result.gopInfo) {\n this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, result.gopInfo, this.safeAppend_);\n } // Although we may have already started appending on progress, we shouldn't switch the\n // state away from loading until we are officially done loading the segment data.\n\n this.state = 'APPENDING'; // used for testing\n\n this.trigger('appending');\n this.waitForAppendsToComplete_(segmentInfo);\n }\n setTimeMapping_(timeline) {\n const timelineMapping = this.syncController_.mappingForTimeline(timeline);\n if (timelineMapping !== null) {\n this.timeMapping_ = timelineMapping;\n }\n }\n updateMediaSecondsLoaded_(segment) {\n if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n this.mediaSecondsLoaded += segment.end - segment.start;\n } else {\n this.mediaSecondsLoaded += segment.duration;\n }\n }\n shouldUpdateTransmuxerTimestampOffset_(timestampOffset) {\n if (timestampOffset === null) {\n return false;\n } // note that we're potentially using the same timestamp offset for both video and\n // audio\n\n if (this.loaderType_ === 'main' && timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n return true;\n }\n if (!this.audioDisabled_ && timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n return true;\n }\n return false;\n }\n trueSegmentStart_({\n currentStart,\n playlist,\n mediaIndex,\n firstVideoFrameTimeForData,\n currentVideoTimestampOffset,\n useVideoTimingInfo,\n videoTimingInfo,\n audioTimingInfo\n }) {\n if (typeof currentStart !== 'undefined') {\n // if start was set once, keep using it\n return currentStart;\n }\n if (!useVideoTimingInfo) {\n return audioTimingInfo.start;\n }\n const previousSegment = playlist.segments[mediaIndex - 1]; // The start of a segment should be the start of the first full frame contained\n // within that segment. Since the transmuxer maintains a cache of incomplete data\n // from and/or the last frame seen, the start time may reflect a frame that starts\n // in the previous segment. Check for that case and ensure the start time is\n // accurate for the segment.\n\n if (mediaIndex === 0 || !previousSegment || typeof previousSegment.start === 'undefined' || previousSegment.end !== firstVideoFrameTimeForData + currentVideoTimestampOffset) {\n return firstVideoFrameTimeForData;\n }\n return videoTimingInfo.start;\n }\n waitForAppendsToComplete_(segmentInfo) {\n const trackInfo = this.getCurrentMediaInfo_(segmentInfo);\n if (!trackInfo) {\n this.error({\n message: 'No starting media returned, likely due to an unsupported media format.',\n playlistExclusionDuration: Infinity\n });\n this.trigger('error');\n return;\n } // Although transmuxing is done, appends may not yet be finished. Throw a marker\n // on each queue this loader is responsible for to ensure that the appends are\n // complete.\n\n const {\n hasAudio,\n hasVideo,\n isMuxed\n } = trackInfo;\n const waitForVideo = this.loaderType_ === 'main' && hasVideo;\n const waitForAudio = !this.audioDisabled_ && hasAudio && !isMuxed;\n segmentInfo.waitingOnAppends = 0; // segments with no data\n\n if (!segmentInfo.hasAppendedData_) {\n if (!segmentInfo.timingInfo && typeof segmentInfo.timestampOffset === 'number') {\n // When there's no audio or video data in the segment, there's no audio or video\n // timing information.\n //\n // If there's no audio or video timing information, then the timestamp offset\n // can't be adjusted to the appropriate value for the transmuxer and source\n // buffers.\n //\n // Therefore, the next segment should be used to set the timestamp offset.\n this.isPendingTimestampOffset_ = true;\n } // override settings for metadata only segments\n\n segmentInfo.timingInfo = {\n start: 0\n };\n segmentInfo.waitingOnAppends++;\n if (!this.isPendingTimestampOffset_) {\n // update the timestampoffset\n this.updateSourceBufferTimestampOffset_(segmentInfo); // make sure the metadata queue is processed even though we have\n // no video/audio data.\n\n this.processMetadataQueue_();\n } // append is \"done\" instantly with no data.\n\n this.checkAppendsDone_(segmentInfo);\n return;\n } // Since source updater could call back synchronously, do the increments first.\n\n if (waitForVideo) {\n segmentInfo.waitingOnAppends++;\n }\n if (waitForAudio) {\n segmentInfo.waitingOnAppends++;\n }\n if (waitForVideo) {\n this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n }\n if (waitForAudio) {\n this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n }\n }\n checkAppendsDone_(segmentInfo) {\n if (this.checkForAbort_(segmentInfo.requestId)) {\n return;\n }\n segmentInfo.waitingOnAppends--;\n if (segmentInfo.waitingOnAppends === 0) {\n this.handleAppendsDone_();\n }\n }\n checkForIllegalMediaSwitch(trackInfo) {\n const illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.getCurrentMediaInfo_(), trackInfo);\n if (illegalMediaSwitchError) {\n this.error({\n message: illegalMediaSwitchError,\n playlistExclusionDuration: Infinity\n });\n this.trigger('error');\n return true;\n }\n return false;\n }\n updateSourceBufferTimestampOffset_(segmentInfo) {\n if (segmentInfo.timestampOffset === null ||\n // we don't yet have the start for whatever media type (video or audio) has\n // priority, timing-wise, so we must wait\n typeof segmentInfo.timingInfo.start !== 'number' ||\n // already updated the timestamp offset for this segment\n segmentInfo.changedTimestampOffset ||\n // the alt audio loader should not be responsible for setting the timestamp offset\n this.loaderType_ !== 'main') {\n return;\n }\n let didChange = false; // Primary timing goes by video, and audio is trimmed in the transmuxer, meaning that\n // the timing info here comes from video. In the event that the audio is longer than\n // the video, this will trim the start of the audio.\n // This also trims any offset from 0 at the beginning of the media\n\n segmentInfo.timestampOffset -= this.getSegmentStartTimeForTimestampOffsetCalculation_({\n videoTimingInfo: segmentInfo.segment.videoTimingInfo,\n audioTimingInfo: segmentInfo.segment.audioTimingInfo,\n timingInfo: segmentInfo.timingInfo\n }); // In the event that there are part segment downloads, each will try to update the\n // timestamp offset. Retaining this bit of state prevents us from updating in the\n // future (within the same segment), however, there may be a better way to handle it.\n\n segmentInfo.changedTimestampOffset = true;\n if (segmentInfo.timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n this.sourceUpdater_.videoTimestampOffset(segmentInfo.timestampOffset);\n didChange = true;\n }\n if (segmentInfo.timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n this.sourceUpdater_.audioTimestampOffset(segmentInfo.timestampOffset);\n didChange = true;\n }\n if (didChange) {\n this.trigger('timestampoffset');\n }\n }\n getSegmentStartTimeForTimestampOffsetCalculation_({\n videoTimingInfo,\n audioTimingInfo,\n timingInfo\n }) {\n if (!this.useDtsForTimestampOffset_) {\n return timingInfo.start;\n }\n if (videoTimingInfo && typeof videoTimingInfo.transmuxedDecodeStart === 'number') {\n return videoTimingInfo.transmuxedDecodeStart;\n } // handle audio only\n\n if (audioTimingInfo && typeof audioTimingInfo.transmuxedDecodeStart === 'number') {\n return audioTimingInfo.transmuxedDecodeStart;\n } // handle content not transmuxed (e.g., MP4)\n\n return timingInfo.start;\n }\n updateTimingInfoEnd_(segmentInfo) {\n segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n const trackInfo = this.getMediaInfo_();\n const useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n const prioritizedTimingInfo = useVideoTimingInfo && segmentInfo.videoTimingInfo ? segmentInfo.videoTimingInfo : segmentInfo.audioTimingInfo;\n if (!prioritizedTimingInfo) {\n return;\n }\n segmentInfo.timingInfo.end = typeof prioritizedTimingInfo.end === 'number' ?\n // End time may not exist in a case where we aren't parsing the full segment (one\n // current example is the case of fmp4), so use the rough duration to calculate an\n // end time.\n prioritizedTimingInfo.end : prioritizedTimingInfo.start + segmentInfo.duration;\n }\n /**\n * callback to run when appendBuffer is finished. detects if we are\n * in a good state to do things with the data we got, or if we need\n * to wait for more\n *\n * @private\n */\n\n handleAppendsDone_() {\n // appendsdone can cause an abort\n if (this.pendingSegment_) {\n this.trigger('appendsdone');\n }\n if (!this.pendingSegment_) {\n this.state = 'READY'; // TODO should this move into this.checkForAbort to speed up requests post abort in\n // all appending cases?\n\n if (!this.paused()) {\n this.monitorBuffer_();\n }\n return;\n }\n const segmentInfo = this.pendingSegment_; // Now that the end of the segment has been reached, we can set the end time. It's\n // best to wait until all appends are done so we're sure that the primary media is\n // finished (and we have its end time).\n\n this.updateTimingInfoEnd_(segmentInfo);\n if (this.shouldSaveSegmentTimingInfo_) {\n // Timeline mappings should only be saved for the main loader. This is for multiple\n // reasons:\n //\n // 1) Only one mapping is saved per timeline, meaning that if both the audio loader\n // and the main loader try to save the timeline mapping, whichever comes later\n // will overwrite the first. In theory this is OK, as the mappings should be the\n // same, however, it breaks for (2)\n // 2) In the event of a live stream, the initial live point will make for a somewhat\n // arbitrary mapping. If audio and video streams are not perfectly in-sync, then\n // the mapping will be off for one of the streams, dependent on which one was\n // first saved (see (1)).\n // 3) Primary timing goes by video in VHS, so the mapping should be video.\n //\n // Since the audio loader will wait for the main loader to load the first segment,\n // the main loader will save the first timeline mapping, and ensure that there won't\n // be a case where audio loads two segments without saving a mapping (thus leading\n // to missing segment timing info).\n this.syncController_.saveSegmentTimingInfo({\n segmentInfo,\n shouldSaveTimelineMapping: this.loaderType_ === 'main'\n });\n }\n const segmentDurationMessage = getTroublesomeSegmentDurationMessage(segmentInfo, this.sourceType_);\n if (segmentDurationMessage) {\n if (segmentDurationMessage.severity === 'warn') {\n videojs.log.warn(segmentDurationMessage.message);\n } else {\n this.logger_(segmentDurationMessage.message);\n }\n }\n this.recordThroughput_(segmentInfo);\n this.pendingSegment_ = null;\n this.state = 'READY';\n if (segmentInfo.isSyncRequest) {\n this.trigger('syncinfoupdate'); // if the sync request was not appended\n // then it was not the correct segment.\n // throw it away and use the data it gave us\n // to get the correct one.\n\n if (!segmentInfo.hasAppendedData_) {\n this.logger_(`Throwing away un-appended sync request ${segmentInfoString(segmentInfo)}`);\n return;\n }\n }\n this.logger_(`Appended ${segmentInfoString(segmentInfo)}`);\n this.addSegmentMetadataCue_(segmentInfo);\n this.fetchAtBuffer_ = true;\n if (this.currentTimeline_ !== segmentInfo.timeline) {\n this.timelineChangeController_.lastTimelineChange({\n type: this.loaderType_,\n from: this.currentTimeline_,\n to: segmentInfo.timeline\n }); // If audio is not disabled, the main segment loader is responsible for updating\n // the audio timeline as well. If the content is video only, this won't have any\n // impact.\n\n if (this.loaderType_ === 'main' && !this.audioDisabled_) {\n this.timelineChangeController_.lastTimelineChange({\n type: 'audio',\n from: this.currentTimeline_,\n to: segmentInfo.timeline\n });\n }\n }\n this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before\n // the following conditional otherwise it may consider this a bad \"guess\"\n // and attempt to resync when the post-update seekable window and live\n // point would mean that this was the perfect segment to fetch\n\n this.trigger('syncinfoupdate');\n const segment = segmentInfo.segment;\n const part = segmentInfo.part;\n const badSegmentGuess = segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3;\n const badPartGuess = part && part.end && this.currentTime_() - part.end > segmentInfo.playlist.partTargetDuration * 3; // If we previously appended a segment/part that ends more than 3 part/targetDurations before\n // the currentTime_ that means that our conservative guess was too conservative.\n // In that case, reset the loader state so that we try to use any information gained\n // from the previous request to create a new, more accurate, sync-point.\n\n if (badSegmentGuess || badPartGuess) {\n this.logger_(`bad ${badSegmentGuess ? 'segment' : 'part'} ${segmentInfoString(segmentInfo)}`);\n this.resetEverything();\n return;\n }\n const isWalkingForward = this.mediaIndex !== null; // Don't do a rendition switch unless we have enough time to get a sync segment\n // and conservatively guess\n\n if (isWalkingForward) {\n this.trigger('bandwidthupdate');\n }\n this.trigger('progress');\n this.mediaIndex = segmentInfo.mediaIndex;\n this.partIndex = segmentInfo.partIndex; // any time an update finishes and the last segment is in the\n // buffer, end the stream. this ensures the \"ended\" event will\n // fire if playback reaches that point.\n\n if (this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex)) {\n this.endOfStream();\n } // used for testing\n\n this.trigger('appended');\n if (segmentInfo.hasAppendedData_) {\n this.mediaAppends++;\n }\n if (!this.paused()) {\n this.monitorBuffer_();\n }\n }\n /**\n * Records the current throughput of the decrypt, transmux, and append\n * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n * moving average of the throughput. `throughput.count` is the number of\n * data points in the average.\n *\n * @private\n * @param {Object} segmentInfo the object returned by loadSegment\n */\n\n recordThroughput_(segmentInfo) {\n if (segmentInfo.duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n this.logger_(`Ignoring segment's throughput because its duration of ${segmentInfo.duration}` + ` is less than the min to record ${MIN_SEGMENT_DURATION_TO_SAVE_STATS}`);\n return;\n }\n const rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide\n // by zero in the case where the throughput is ridiculously high\n\n const segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second\n\n const segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:\n // newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n\n this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n }\n /**\n * Adds a cue to the segment-metadata track with some metadata information about the\n * segment\n *\n * @private\n * @param {Object} segmentInfo\n * the object returned by loadSegment\n * @method addSegmentMetadataCue_\n */\n\n addSegmentMetadataCue_(segmentInfo) {\n if (!this.segmentMetadataTrack_) {\n return;\n }\n const segment = segmentInfo.segment;\n const start = segment.start;\n const end = segment.end; // Do not try adding the cue if the start and end times are invalid.\n\n if (!finite(start) || !finite(end)) {\n return;\n }\n removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n const Cue = window.WebKitDataCue || window.VTTCue;\n const value = {\n custom: segment.custom,\n dateTimeObject: segment.dateTimeObject,\n dateTimeString: segment.dateTimeString,\n bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n resolution: segmentInfo.playlist.attributes.RESOLUTION,\n codecs: segmentInfo.playlist.attributes.CODECS,\n byteLength: segmentInfo.byteLength,\n uri: segmentInfo.uri,\n timeline: segmentInfo.timeline,\n playlist: segmentInfo.playlist.id,\n start,\n end\n };\n const data = JSON.stringify(value);\n const cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between\n // the differences of WebKitDataCue in safari and VTTCue in other browsers\n\n cue.value = value;\n this.segmentMetadataTrack_.addCue(cue);\n }\n }\n function noop() {}\n const toTitleCase = function (string) {\n if (typeof string !== 'string') {\n return string;\n }\n return string.replace(/./, w => w.toUpperCase());\n };\n\n /**\n * @file source-updater.js\n */\n const bufferTypes = ['video', 'audio'];\n const updating = (type, sourceUpdater) => {\n const sourceBuffer = sourceUpdater[`${type}Buffer`];\n return sourceBuffer && sourceBuffer.updating || sourceUpdater.queuePending[type];\n };\n const nextQueueIndexOfType = (type, queue) => {\n for (let i = 0; i < queue.length; i++) {\n const queueEntry = queue[i];\n if (queueEntry.type === 'mediaSource') {\n // If the next entry is a media source entry (uses multiple source buffers), block\n // processing to allow it to go through first.\n return null;\n }\n if (queueEntry.type === type) {\n return i;\n }\n }\n return null;\n };\n const shiftQueue = (type, sourceUpdater) => {\n if (sourceUpdater.queue.length === 0) {\n return;\n }\n let queueIndex = 0;\n let queueEntry = sourceUpdater.queue[queueIndex];\n if (queueEntry.type === 'mediaSource') {\n if (!sourceUpdater.updating() && sourceUpdater.mediaSource.readyState !== 'closed') {\n sourceUpdater.queue.shift();\n queueEntry.action(sourceUpdater);\n if (queueEntry.doneFn) {\n queueEntry.doneFn();\n } // Only specific source buffer actions must wait for async updateend events. Media\n // Source actions process synchronously. Therefore, both audio and video source\n // buffers are now clear to process the next queue entries.\n\n shiftQueue('audio', sourceUpdater);\n shiftQueue('video', sourceUpdater);\n } // Media Source actions require both source buffers, so if the media source action\n // couldn't process yet (because one or both source buffers are busy), block other\n // queue actions until both are available and the media source action can process.\n\n return;\n }\n if (type === 'mediaSource') {\n // If the queue was shifted by a media source action (this happens when pushing a\n // media source action onto the queue), then it wasn't from an updateend event from an\n // audio or video source buffer, so there's no change from previous state, and no\n // processing should be done.\n return;\n } // Media source queue entries don't need to consider whether the source updater is\n // started (i.e., source buffers are created) as they don't need the source buffers, but\n // source buffer queue entries do.\n\n if (!sourceUpdater.ready() || sourceUpdater.mediaSource.readyState === 'closed' || updating(type, sourceUpdater)) {\n return;\n }\n if (queueEntry.type !== type) {\n queueIndex = nextQueueIndexOfType(type, sourceUpdater.queue);\n if (queueIndex === null) {\n // Either there's no queue entry that uses this source buffer type in the queue, or\n // there's a media source queue entry before the next entry of this type, in which\n // case wait for that action to process first.\n return;\n }\n queueEntry = sourceUpdater.queue[queueIndex];\n }\n sourceUpdater.queue.splice(queueIndex, 1); // Keep a record that this source buffer type is in use.\n //\n // The queue pending operation must be set before the action is performed in the event\n // that the action results in a synchronous event that is acted upon. For instance, if\n // an exception is thrown that can be handled, it's possible that new actions will be\n // appended to an empty queue and immediately executed, but would not have the correct\n // pending information if this property was set after the action was performed.\n\n sourceUpdater.queuePending[type] = queueEntry;\n queueEntry.action(type, sourceUpdater);\n if (!queueEntry.doneFn) {\n // synchronous operation, process next entry\n sourceUpdater.queuePending[type] = null;\n shiftQueue(type, sourceUpdater);\n return;\n }\n };\n const cleanupBuffer = (type, sourceUpdater) => {\n const buffer = sourceUpdater[`${type}Buffer`];\n const titleType = toTitleCase(type);\n if (!buffer) {\n return;\n }\n buffer.removeEventListener('updateend', sourceUpdater[`on${titleType}UpdateEnd_`]);\n buffer.removeEventListener('error', sourceUpdater[`on${titleType}Error_`]);\n sourceUpdater.codecs[type] = null;\n sourceUpdater[`${type}Buffer`] = null;\n };\n const inSourceBuffers = (mediaSource, sourceBuffer) => mediaSource && sourceBuffer && Array.prototype.indexOf.call(mediaSource.sourceBuffers, sourceBuffer) !== -1;\n const actions = {\n appendBuffer: (bytes, segmentInfo, onError) => (type, sourceUpdater) => {\n const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null\n // or the media source does not contain this source buffer.\n\n if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n return;\n }\n sourceUpdater.logger_(`Appending segment ${segmentInfo.mediaIndex}'s ${bytes.length} bytes to ${type}Buffer`);\n try {\n sourceBuffer.appendBuffer(bytes);\n } catch (e) {\n sourceUpdater.logger_(`Error with code ${e.code} ` + (e.code === QUOTA_EXCEEDED_ERR ? '(QUOTA_EXCEEDED_ERR) ' : '') + `when appending segment ${segmentInfo.mediaIndex} to ${type}Buffer`);\n sourceUpdater.queuePending[type] = null;\n onError(e);\n }\n },\n remove: (start, end) => (type, sourceUpdater) => {\n const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null\n // or the media source does not contain this source buffer.\n\n if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n return;\n }\n sourceUpdater.logger_(`Removing ${start} to ${end} from ${type}Buffer`);\n try {\n sourceBuffer.remove(start, end);\n } catch (e) {\n sourceUpdater.logger_(`Remove ${start} to ${end} from ${type}Buffer failed`);\n }\n },\n timestampOffset: offset => (type, sourceUpdater) => {\n const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null\n // or the media source does not contain this source buffer.\n\n if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n return;\n }\n sourceUpdater.logger_(`Setting ${type}timestampOffset to ${offset}`);\n sourceBuffer.timestampOffset = offset;\n },\n callback: callback => (type, sourceUpdater) => {\n callback();\n },\n endOfStream: error => sourceUpdater => {\n if (sourceUpdater.mediaSource.readyState !== 'open') {\n return;\n }\n sourceUpdater.logger_(`Calling mediaSource endOfStream(${error || ''})`);\n try {\n sourceUpdater.mediaSource.endOfStream(error);\n } catch (e) {\n videojs.log.warn('Failed to call media source endOfStream', e);\n }\n },\n duration: duration => sourceUpdater => {\n sourceUpdater.logger_(`Setting mediaSource duration to ${duration}`);\n try {\n sourceUpdater.mediaSource.duration = duration;\n } catch (e) {\n videojs.log.warn('Failed to set media source duration', e);\n }\n },\n abort: () => (type, sourceUpdater) => {\n if (sourceUpdater.mediaSource.readyState !== 'open') {\n return;\n }\n const sourceBuffer = sourceUpdater[`${type}Buffer`]; // can't do anything if the media source / source buffer is null\n // or the media source does not contain this source buffer.\n\n if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n return;\n }\n sourceUpdater.logger_(`calling abort on ${type}Buffer`);\n try {\n sourceBuffer.abort();\n } catch (e) {\n videojs.log.warn(`Failed to abort on ${type}Buffer`, e);\n }\n },\n addSourceBuffer: (type, codec) => sourceUpdater => {\n const titleType = toTitleCase(type);\n const mime = getMimeForCodec(codec);\n sourceUpdater.logger_(`Adding ${type}Buffer with codec ${codec} to mediaSource`);\n const sourceBuffer = sourceUpdater.mediaSource.addSourceBuffer(mime);\n sourceBuffer.addEventListener('updateend', sourceUpdater[`on${titleType}UpdateEnd_`]);\n sourceBuffer.addEventListener('error', sourceUpdater[`on${titleType}Error_`]);\n sourceUpdater.codecs[type] = codec;\n sourceUpdater[`${type}Buffer`] = sourceBuffer;\n },\n removeSourceBuffer: type => sourceUpdater => {\n const sourceBuffer = sourceUpdater[`${type}Buffer`];\n cleanupBuffer(type, sourceUpdater); // can't do anything if the media source / source buffer is null\n // or the media source does not contain this source buffer.\n\n if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n return;\n }\n sourceUpdater.logger_(`Removing ${type}Buffer with codec ${sourceUpdater.codecs[type]} from mediaSource`);\n try {\n sourceUpdater.mediaSource.removeSourceBuffer(sourceBuffer);\n } catch (e) {\n videojs.log.warn(`Failed to removeSourceBuffer ${type}Buffer`, e);\n }\n },\n changeType: codec => (type, sourceUpdater) => {\n const sourceBuffer = sourceUpdater[`${type}Buffer`];\n const mime = getMimeForCodec(codec); // can't do anything if the media source / source buffer is null\n // or the media source does not contain this source buffer.\n\n if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n return;\n } // do not update codec if we don't need to.\n\n if (sourceUpdater.codecs[type] === codec) {\n return;\n }\n sourceUpdater.logger_(`changing ${type}Buffer codec from ${sourceUpdater.codecs[type]} to ${codec}`);\n sourceBuffer.changeType(mime);\n sourceUpdater.codecs[type] = codec;\n }\n };\n const pushQueue = ({\n type,\n sourceUpdater,\n action,\n doneFn,\n name\n }) => {\n sourceUpdater.queue.push({\n type,\n action,\n doneFn,\n name\n });\n shiftQueue(type, sourceUpdater);\n };\n const onUpdateend = (type, sourceUpdater) => e => {\n // Although there should, in theory, be a pending action for any updateend receieved,\n // there are some actions that may trigger updateend events without set definitions in\n // the w3c spec. For instance, setting the duration on the media source may trigger\n // updateend events on source buffers. This does not appear to be in the spec. As such,\n // if we encounter an updateend without a corresponding pending action from our queue\n // for that source buffer type, process the next action.\n if (sourceUpdater.queuePending[type]) {\n const doneFn = sourceUpdater.queuePending[type].doneFn;\n sourceUpdater.queuePending[type] = null;\n if (doneFn) {\n // if there's an error, report it\n doneFn(sourceUpdater[`${type}Error_`]);\n }\n }\n shiftQueue(type, sourceUpdater);\n };\n /**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the SourceBuffer from\n * @param {string} mimeType the desired MIME type of the underlying SourceBuffer\n */\n\n class SourceUpdater extends videojs.EventTarget {\n constructor(mediaSource) {\n super();\n this.mediaSource = mediaSource;\n this.sourceopenListener_ = () => shiftQueue('mediaSource', this);\n this.mediaSource.addEventListener('sourceopen', this.sourceopenListener_);\n this.logger_ = logger('SourceUpdater'); // initial timestamp offset is 0\n\n this.audioTimestampOffset_ = 0;\n this.videoTimestampOffset_ = 0;\n this.queue = [];\n this.queuePending = {\n audio: null,\n video: null\n };\n this.delayedAudioAppendQueue_ = [];\n this.videoAppendQueued_ = false;\n this.codecs = {};\n this.onVideoUpdateEnd_ = onUpdateend('video', this);\n this.onAudioUpdateEnd_ = onUpdateend('audio', this);\n this.onVideoError_ = e => {\n // used for debugging\n this.videoError_ = e;\n };\n this.onAudioError_ = e => {\n // used for debugging\n this.audioError_ = e;\n };\n this.createdSourceBuffers_ = false;\n this.initializedEme_ = false;\n this.triggeredReady_ = false;\n }\n initializedEme() {\n this.initializedEme_ = true;\n this.triggerReady();\n }\n hasCreatedSourceBuffers() {\n // if false, likely waiting on one of the segment loaders to get enough data to create\n // source buffers\n return this.createdSourceBuffers_;\n }\n hasInitializedAnyEme() {\n return this.initializedEme_;\n }\n ready() {\n return this.hasCreatedSourceBuffers() && this.hasInitializedAnyEme();\n }\n createSourceBuffers(codecs) {\n if (this.hasCreatedSourceBuffers()) {\n // already created them before\n return;\n } // the intial addOrChangeSourceBuffers will always be\n // two add buffers.\n\n this.addOrChangeSourceBuffers(codecs);\n this.createdSourceBuffers_ = true;\n this.trigger('createdsourcebuffers');\n this.triggerReady();\n }\n triggerReady() {\n // only allow ready to be triggered once, this prevents the case\n // where:\n // 1. we trigger createdsourcebuffers\n // 2. ie 11 synchronously initializates eme\n // 3. the synchronous initialization causes us to trigger ready\n // 4. We go back to the ready check in createSourceBuffers and ready is triggered again.\n if (this.ready() && !this.triggeredReady_) {\n this.triggeredReady_ = true;\n this.trigger('ready');\n }\n }\n /**\n * Add a type of source buffer to the media source.\n *\n * @param {string} type\n * The type of source buffer to add.\n *\n * @param {string} codec\n * The codec to add the source buffer with.\n */\n\n addSourceBuffer(type, codec) {\n pushQueue({\n type: 'mediaSource',\n sourceUpdater: this,\n action: actions.addSourceBuffer(type, codec),\n name: 'addSourceBuffer'\n });\n }\n /**\n * call abort on a source buffer.\n *\n * @param {string} type\n * The type of source buffer to call abort on.\n */\n\n abort(type) {\n pushQueue({\n type,\n sourceUpdater: this,\n action: actions.abort(type),\n name: 'abort'\n });\n }\n /**\n * Call removeSourceBuffer and remove a specific type\n * of source buffer on the mediaSource.\n *\n * @param {string} type\n * The type of source buffer to remove.\n */\n\n removeSourceBuffer(type) {\n if (!this.canRemoveSourceBuffer()) {\n videojs.log.error('removeSourceBuffer is not supported!');\n return;\n }\n pushQueue({\n type: 'mediaSource',\n sourceUpdater: this,\n action: actions.removeSourceBuffer(type),\n name: 'removeSourceBuffer'\n });\n }\n /**\n * Whether or not the removeSourceBuffer function is supported\n * on the mediaSource.\n *\n * @return {boolean}\n * if removeSourceBuffer can be called.\n */\n\n canRemoveSourceBuffer() {\n // IE reports that it supports removeSourceBuffer, but often throws\n // errors when attempting to use the function. So we report that it\n // does not support removeSourceBuffer. As of Firefox 83 removeSourceBuffer\n // throws errors, so we report that it does not support this as well.\n return !videojs.browser.IE_VERSION && !videojs.browser.IS_FIREFOX && window.MediaSource && window.MediaSource.prototype && typeof window.MediaSource.prototype.removeSourceBuffer === 'function';\n }\n /**\n * Whether or not the changeType function is supported\n * on our SourceBuffers.\n *\n * @return {boolean}\n * if changeType can be called.\n */\n\n static canChangeType() {\n return window.SourceBuffer && window.SourceBuffer.prototype && typeof window.SourceBuffer.prototype.changeType === 'function';\n }\n /**\n * Whether or not the changeType function is supported\n * on our SourceBuffers.\n *\n * @return {boolean}\n * if changeType can be called.\n */\n\n canChangeType() {\n return this.constructor.canChangeType();\n }\n /**\n * Call the changeType function on a source buffer, given the code and type.\n *\n * @param {string} type\n * The type of source buffer to call changeType on.\n *\n * @param {string} codec\n * The codec string to change type with on the source buffer.\n */\n\n changeType(type, codec) {\n if (!this.canChangeType()) {\n videojs.log.error('changeType is not supported!');\n return;\n }\n pushQueue({\n type,\n sourceUpdater: this,\n action: actions.changeType(codec),\n name: 'changeType'\n });\n }\n /**\n * Add source buffers with a codec or, if they are already created,\n * call changeType on source buffers using changeType.\n *\n * @param {Object} codecs\n * Codecs to switch to\n */\n\n addOrChangeSourceBuffers(codecs) {\n if (!codecs || typeof codecs !== 'object' || Object.keys(codecs).length === 0) {\n throw new Error('Cannot addOrChangeSourceBuffers to undefined codecs');\n }\n Object.keys(codecs).forEach(type => {\n const codec = codecs[type];\n if (!this.hasCreatedSourceBuffers()) {\n return this.addSourceBuffer(type, codec);\n }\n if (this.canChangeType()) {\n this.changeType(type, codec);\n }\n });\n }\n /**\n * Queue an update to append an ArrayBuffer.\n *\n * @param {MediaObject} object containing audioBytes and/or videoBytes\n * @param {Function} done the function to call when done\n * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n */\n\n appendBuffer(options, doneFn) {\n const {\n segmentInfo,\n type,\n bytes\n } = options;\n this.processedAppend_ = true;\n if (type === 'audio' && this.videoBuffer && !this.videoAppendQueued_) {\n this.delayedAudioAppendQueue_.push([options, doneFn]);\n this.logger_(`delayed audio append of ${bytes.length} until video append`);\n return;\n } // In the case of certain errors, for instance, QUOTA_EXCEEDED_ERR, updateend will\n // not be fired. This means that the queue will be blocked until the next action\n // taken by the segment-loader. Provide a mechanism for segment-loader to handle\n // these errors by calling the doneFn with the specific error.\n\n const onError = doneFn;\n pushQueue({\n type,\n sourceUpdater: this,\n action: actions.appendBuffer(bytes, segmentInfo || {\n mediaIndex: -1\n }, onError),\n doneFn,\n name: 'appendBuffer'\n });\n if (type === 'video') {\n this.videoAppendQueued_ = true;\n if (!this.delayedAudioAppendQueue_.length) {\n return;\n }\n const queue = this.delayedAudioAppendQueue_.slice();\n this.logger_(`queuing delayed audio ${queue.length} appendBuffers`);\n this.delayedAudioAppendQueue_.length = 0;\n queue.forEach(que => {\n this.appendBuffer.apply(this, que);\n });\n }\n }\n /**\n * Get the audio buffer's buffered timerange.\n *\n * @return {TimeRange}\n * The audio buffer's buffered time range\n */\n\n audioBuffered() {\n // no media source/source buffer or it isn't in the media sources\n // source buffer list\n if (!inSourceBuffers(this.mediaSource, this.audioBuffer)) {\n return createTimeRanges();\n }\n return this.audioBuffer.buffered ? this.audioBuffer.buffered : createTimeRanges();\n }\n /**\n * Get the video buffer's buffered timerange.\n *\n * @return {TimeRange}\n * The video buffer's buffered time range\n */\n\n videoBuffered() {\n // no media source/source buffer or it isn't in the media sources\n // source buffer list\n if (!inSourceBuffers(this.mediaSource, this.videoBuffer)) {\n return createTimeRanges();\n }\n return this.videoBuffer.buffered ? this.videoBuffer.buffered : createTimeRanges();\n }\n /**\n * Get a combined video/audio buffer's buffered timerange.\n *\n * @return {TimeRange}\n * the combined time range\n */\n\n buffered() {\n const video = inSourceBuffers(this.mediaSource, this.videoBuffer) ? this.videoBuffer : null;\n const audio = inSourceBuffers(this.mediaSource, this.audioBuffer) ? this.audioBuffer : null;\n if (audio && !video) {\n return this.audioBuffered();\n }\n if (video && !audio) {\n return this.videoBuffered();\n }\n return bufferIntersection(this.audioBuffered(), this.videoBuffered());\n }\n /**\n * Add a callback to the queue that will set duration on the mediaSource.\n *\n * @param {number} duration\n * The duration to set\n *\n * @param {Function} [doneFn]\n * function to run after duration has been set.\n */\n\n setDuration(duration, doneFn = noop) {\n // In order to set the duration on the media source, it's necessary to wait for all\n // source buffers to no longer be updating. \"If the updating attribute equals true on\n // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n pushQueue({\n type: 'mediaSource',\n sourceUpdater: this,\n action: actions.duration(duration),\n name: 'duration',\n doneFn\n });\n }\n /**\n * Add a mediaSource endOfStream call to the queue\n *\n * @param {Error} [error]\n * Call endOfStream with an error\n *\n * @param {Function} [doneFn]\n * A function that should be called when the\n * endOfStream call has finished.\n */\n\n endOfStream(error = null, doneFn = noop) {\n if (typeof error !== 'string') {\n error = undefined;\n } // In order to set the duration on the media source, it's necessary to wait for all\n // source buffers to no longer be updating. \"If the updating attribute equals true on\n // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n pushQueue({\n type: 'mediaSource',\n sourceUpdater: this,\n action: actions.endOfStream(error),\n name: 'endOfStream',\n doneFn\n });\n }\n /**\n * Queue an update to remove a time range from the buffer.\n *\n * @param {number} start where to start the removal\n * @param {number} end where to end the removal\n * @param {Function} [done=noop] optional callback to be executed when the remove\n * operation is complete\n * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n */\n\n removeAudio(start, end, done = noop) {\n if (!this.audioBuffered().length || this.audioBuffered().end(0) === 0) {\n done();\n return;\n }\n pushQueue({\n type: 'audio',\n sourceUpdater: this,\n action: actions.remove(start, end),\n doneFn: done,\n name: 'remove'\n });\n }\n /**\n * Queue an update to remove a time range from the buffer.\n *\n * @param {number} start where to start the removal\n * @param {number} end where to end the removal\n * @param {Function} [done=noop] optional callback to be executed when the remove\n * operation is complete\n * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n */\n\n removeVideo(start, end, done = noop) {\n if (!this.videoBuffered().length || this.videoBuffered().end(0) === 0) {\n done();\n return;\n }\n pushQueue({\n type: 'video',\n sourceUpdater: this,\n action: actions.remove(start, end),\n doneFn: done,\n name: 'remove'\n });\n }\n /**\n * Whether the underlying sourceBuffer is updating or not\n *\n * @return {boolean} the updating status of the SourceBuffer\n */\n\n updating() {\n // the audio/video source buffer is updating\n if (updating('audio', this) || updating('video', this)) {\n return true;\n }\n return false;\n }\n /**\n * Set/get the timestampoffset on the audio SourceBuffer\n *\n * @return {number} the timestamp offset\n */\n\n audioTimestampOffset(offset) {\n if (typeof offset !== 'undefined' && this.audioBuffer &&\n // no point in updating if it's the same\n this.audioTimestampOffset_ !== offset) {\n pushQueue({\n type: 'audio',\n sourceUpdater: this,\n action: actions.timestampOffset(offset),\n name: 'timestampOffset'\n });\n this.audioTimestampOffset_ = offset;\n }\n return this.audioTimestampOffset_;\n }\n /**\n * Set/get the timestampoffset on the video SourceBuffer\n *\n * @return {number} the timestamp offset\n */\n\n videoTimestampOffset(offset) {\n if (typeof offset !== 'undefined' && this.videoBuffer &&\n // no point in updating if it's the same\n this.videoTimestampOffset !== offset) {\n pushQueue({\n type: 'video',\n sourceUpdater: this,\n action: actions.timestampOffset(offset),\n name: 'timestampOffset'\n });\n this.videoTimestampOffset_ = offset;\n }\n return this.videoTimestampOffset_;\n }\n /**\n * Add a function to the queue that will be called\n * when it is its turn to run in the audio queue.\n *\n * @param {Function} callback\n * The callback to queue.\n */\n\n audioQueueCallback(callback) {\n if (!this.audioBuffer) {\n return;\n }\n pushQueue({\n type: 'audio',\n sourceUpdater: this,\n action: actions.callback(callback),\n name: 'callback'\n });\n }\n /**\n * Add a function to the queue that will be called\n * when it is its turn to run in the video queue.\n *\n * @param {Function} callback\n * The callback to queue.\n */\n\n videoQueueCallback(callback) {\n if (!this.videoBuffer) {\n return;\n }\n pushQueue({\n type: 'video',\n sourceUpdater: this,\n action: actions.callback(callback),\n name: 'callback'\n });\n }\n /**\n * dispose of the source updater and the underlying sourceBuffer\n */\n\n dispose() {\n this.trigger('dispose');\n bufferTypes.forEach(type => {\n this.abort(type);\n if (this.canRemoveSourceBuffer()) {\n this.removeSourceBuffer(type);\n } else {\n this[`${type}QueueCallback`](() => cleanupBuffer(type, this));\n }\n });\n this.videoAppendQueued_ = false;\n this.delayedAudioAppendQueue_.length = 0;\n if (this.sourceopenListener_) {\n this.mediaSource.removeEventListener('sourceopen', this.sourceopenListener_);\n }\n this.off();\n }\n }\n const uint8ToUtf8 = uintArray => decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));\n\n /**\n * @file vtt-segment-loader.js\n */\n const VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(char => char.charCodeAt(0)));\n class NoVttJsError extends Error {\n constructor() {\n super('Trying to parse received VTT cues, but there is no WebVTT. Make sure vtt.js is loaded.');\n }\n }\n /**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n class VTTSegmentLoader extends SegmentLoader {\n constructor(settings, options = {}) {\n super(settings, options); // SegmentLoader requires a MediaSource be specified or it will throw an error;\n // however, VTTSegmentLoader has no need of a media source, so delete the reference\n\n this.mediaSource_ = null;\n this.subtitlesTrack_ = null;\n this.loaderType_ = 'subtitle';\n this.featuresNativeTextTracks_ = settings.featuresNativeTextTracks;\n this.loadVttJs = settings.loadVttJs; // The VTT segment will have its own time mappings. Saving VTT segment timing info in\n // the sync controller leads to improper behavior.\n\n this.shouldSaveSegmentTimingInfo_ = false;\n }\n createTransmuxer_() {\n // don't need to transmux any subtitles\n return null;\n }\n /**\n * Indicates which time ranges are buffered\n *\n * @return {TimeRange}\n * TimeRange object representing the current buffered ranges\n */\n\n buffered_() {\n if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {\n return createTimeRanges();\n }\n const cues = this.subtitlesTrack_.cues;\n const start = cues[0].startTime;\n const end = cues[cues.length - 1].startTime;\n return createTimeRanges([[start, end]]);\n }\n /**\n * Gets and sets init segment for the provided map\n *\n * @param {Object} map\n * The map object representing the init segment to get or set\n * @param {boolean=} set\n * If true, the init segment for the provided map should be saved\n * @return {Object}\n * map object for desired init segment\n */\n\n initSegmentForMap(map, set = false) {\n if (!map) {\n return null;\n }\n const id = initSegmentId(map);\n let storedMap = this.initSegments_[id];\n if (set && !storedMap && map.bytes) {\n // append WebVTT line terminators to the media initialization segment if it exists\n // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n // requires two or more WebVTT line terminators between the WebVTT header and the\n // rest of the file\n const combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n const combinedSegment = new Uint8Array(combinedByteLength);\n combinedSegment.set(map.bytes);\n combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n this.initSegments_[id] = storedMap = {\n resolvedUri: map.resolvedUri,\n byterange: map.byterange,\n bytes: combinedSegment\n };\n }\n return storedMap || map;\n }\n /**\n * Returns true if all configuration required for loading is present, otherwise false.\n *\n * @return {boolean} True if the all configuration is ready for loading\n * @private\n */\n\n couldBeginLoading_() {\n return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n }\n /**\n * Once all the starting parameters have been specified, begin\n * operation. This method should only be invoked from the INIT\n * state.\n *\n * @private\n */\n\n init_() {\n this.state = 'READY';\n this.resetEverything();\n return this.monitorBuffer_();\n }\n /**\n * Set a subtitle track on the segment loader to add subtitles to\n *\n * @param {TextTrack=} track\n * The text track to add loaded subtitles to\n * @return {TextTrack}\n * Returns the subtitles track\n */\n\n track(track) {\n if (typeof track === 'undefined') {\n return this.subtitlesTrack_;\n }\n this.subtitlesTrack_ = track; // if we were unpaused but waiting for a sourceUpdater, start\n // buffering now\n\n if (this.state === 'INIT' && this.couldBeginLoading_()) {\n this.init_();\n }\n return this.subtitlesTrack_;\n }\n /**\n * Remove any data in the source buffer between start and end times\n *\n * @param {number} start - the start time of the region to remove from the buffer\n * @param {number} end - the end time of the region to remove from the buffer\n */\n\n remove(start, end) {\n removeCuesFromTrack(start, end, this.subtitlesTrack_);\n }\n /**\n * fill the buffer with segements unless the sourceBuffers are\n * currently updating\n *\n * Note: this function should only ever be called by monitorBuffer_\n * and never directly\n *\n * @private\n */\n\n fillBuffer_() {\n // see if we need to begin loading immediately\n const segmentInfo = this.chooseNextRequest_();\n if (!segmentInfo) {\n return;\n }\n if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n // We don't have the timestamp offset that we need to sync subtitles.\n // Rerun on a timestamp offset or user interaction.\n const checkTimestampOffset = () => {\n this.state = 'READY';\n if (!this.paused()) {\n // if not paused, queue a buffer check as soon as possible\n this.monitorBuffer_();\n }\n };\n this.syncController_.one('timestampoffset', checkTimestampOffset);\n this.state = 'WAITING_ON_TIMELINE';\n return;\n }\n this.loadSegment_(segmentInfo);\n } // never set a timestamp offset for vtt segments.\n\n timestampOffsetForSegment_() {\n return null;\n }\n chooseNextRequest_() {\n return this.skipEmptySegments_(super.chooseNextRequest_());\n }\n /**\n * Prevents the segment loader from requesting segments we know contain no subtitles\n * by walking forward until we find the next segment that we don't know whether it is\n * empty or not.\n *\n * @param {Object} segmentInfo\n * a segment info object that describes the current segment\n * @return {Object}\n * a segment info object that describes the current segment\n */\n\n skipEmptySegments_(segmentInfo) {\n while (segmentInfo && segmentInfo.segment.empty) {\n // stop at the last possible segmentInfo\n if (segmentInfo.mediaIndex + 1 >= segmentInfo.playlist.segments.length) {\n segmentInfo = null;\n break;\n }\n segmentInfo = this.generateSegmentInfo_({\n playlist: segmentInfo.playlist,\n mediaIndex: segmentInfo.mediaIndex + 1,\n startOfSegment: segmentInfo.startOfSegment + segmentInfo.duration,\n isSyncRequest: segmentInfo.isSyncRequest\n });\n }\n return segmentInfo;\n }\n stopForError(error) {\n this.error(error);\n this.state = 'READY';\n this.pause();\n this.trigger('error');\n }\n /**\n * append a decrypted segement to the SourceBuffer through a SourceUpdater\n *\n * @private\n */\n\n segmentRequestFinished_(error, simpleSegment, result) {\n if (!this.subtitlesTrack_) {\n this.state = 'READY';\n return;\n }\n this.saveTransferStats_(simpleSegment.stats); // the request was aborted\n\n if (!this.pendingSegment_) {\n this.state = 'READY';\n this.mediaRequestsAborted += 1;\n return;\n }\n if (error) {\n if (error.code === REQUEST_ERRORS.TIMEOUT) {\n this.handleTimeout_();\n }\n if (error.code === REQUEST_ERRORS.ABORTED) {\n this.mediaRequestsAborted += 1;\n } else {\n this.mediaRequestsErrored += 1;\n }\n this.stopForError(error);\n return;\n }\n const segmentInfo = this.pendingSegment_; // although the VTT segment loader bandwidth isn't really used, it's good to\n // maintain functionality between segment loaders\n\n this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats); // if this request included a segment key, save that data in the cache\n\n if (simpleSegment.key) {\n this.segmentKey(simpleSegment.key, true);\n }\n this.state = 'APPENDING'; // used for tests\n\n this.trigger('appending');\n const segment = segmentInfo.segment;\n if (segment.map) {\n segment.map.bytes = simpleSegment.map.bytes;\n }\n segmentInfo.bytes = simpleSegment.bytes; // Make sure that vttjs has loaded, otherwise, load it and wait till it finished loading\n\n if (typeof window.WebVTT !== 'function' && typeof this.loadVttJs === 'function') {\n this.state = 'WAITING_ON_VTTJS'; // should be fine to call multiple times\n // script will be loaded once but multiple listeners will be added to the queue, which is expected.\n\n this.loadVttJs().then(() => this.segmentRequestFinished_(error, simpleSegment, result), () => this.stopForError({\n message: 'Error loading vtt.js'\n }));\n return;\n }\n segment.requested = true;\n try {\n this.parseVTTCues_(segmentInfo);\n } catch (e) {\n this.stopForError({\n message: e.message\n });\n return;\n }\n this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n if (segmentInfo.cues.length) {\n segmentInfo.timingInfo = {\n start: segmentInfo.cues[0].startTime,\n end: segmentInfo.cues[segmentInfo.cues.length - 1].endTime\n };\n } else {\n segmentInfo.timingInfo = {\n start: segmentInfo.startOfSegment,\n end: segmentInfo.startOfSegment + segmentInfo.duration\n };\n }\n if (segmentInfo.isSyncRequest) {\n this.trigger('syncinfoupdate');\n this.pendingSegment_ = null;\n this.state = 'READY';\n return;\n }\n segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n this.mediaSecondsLoaded += segment.duration; // Create VTTCue instances for each cue in the new segment and add them to\n // the subtitle track\n\n segmentInfo.cues.forEach(cue => {\n this.subtitlesTrack_.addCue(this.featuresNativeTextTracks_ ? new window.VTTCue(cue.startTime, cue.endTime, cue.text) : cue);\n }); // Remove any duplicate cues from the subtitle track. The WebVTT spec allows\n // cues to have identical time-intervals, but if the text is also identical\n // we can safely assume it is a duplicate that can be removed (ex. when a cue\n // \"overlaps\" VTT segments)\n\n removeDuplicateCuesFromTrack(this.subtitlesTrack_);\n this.handleAppendsDone_();\n }\n handleData_() {// noop as we shouldn't be getting video/audio data captions\n // that we do not support here.\n }\n updateTimingInfoEnd_() {// noop\n }\n /**\n * Uses the WebVTT parser to parse the segment response\n *\n * @throws NoVttJsError\n *\n * @param {Object} segmentInfo\n * a segment info object that describes the current segment\n * @private\n */\n\n parseVTTCues_(segmentInfo) {\n let decoder;\n let decodeBytesToString = false;\n if (typeof window.WebVTT !== 'function') {\n // caller is responsible for exception handling.\n throw new NoVttJsError();\n }\n if (typeof window.TextDecoder === 'function') {\n decoder = new window.TextDecoder('utf8');\n } else {\n decoder = window.WebVTT.StringDecoder();\n decodeBytesToString = true;\n }\n const parser = new window.WebVTT.Parser(window, window.vttjs, decoder);\n segmentInfo.cues = [];\n segmentInfo.timestampmap = {\n MPEGTS: 0,\n LOCAL: 0\n };\n parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n parser.ontimestampmap = map => {\n segmentInfo.timestampmap = map;\n };\n parser.onparsingerror = error => {\n videojs.log.warn('Error encountered when parsing cues: ' + error.message);\n };\n if (segmentInfo.segment.map) {\n let mapData = segmentInfo.segment.map.bytes;\n if (decodeBytesToString) {\n mapData = uint8ToUtf8(mapData);\n }\n parser.parse(mapData);\n }\n let segmentData = segmentInfo.bytes;\n if (decodeBytesToString) {\n segmentData = uint8ToUtf8(segmentData);\n }\n parser.parse(segmentData);\n parser.flush();\n }\n /**\n * Updates the start and end times of any cues parsed by the WebVTT parser using\n * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n * from the SyncController\n *\n * @param {Object} segmentInfo\n * a segment info object that describes the current segment\n * @param {Object} mappingObj\n * object containing a mapping from TS to media time\n * @param {Object} playlist\n * the playlist object containing the segment\n * @private\n */\n\n updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n const segment = segmentInfo.segment;\n if (!mappingObj) {\n // If the sync controller does not have a mapping of TS to Media Time for the\n // timeline, then we don't have enough information to update the cue\n // start/end times\n return;\n }\n if (!segmentInfo.cues.length) {\n // If there are no cues, we also do not have enough information to figure out\n // segment timing. Mark that the segment contains no cues so we don't re-request\n // an empty segment.\n segment.empty = true;\n return;\n }\n const timestampmap = segmentInfo.timestampmap;\n const diff = timestampmap.MPEGTS / clock_1 - timestampmap.LOCAL + mappingObj.mapping;\n segmentInfo.cues.forEach(cue => {\n // First convert cue time to TS time using the timestamp-map provided within the vtt\n cue.startTime += diff;\n cue.endTime += diff;\n });\n if (!playlist.syncInfo) {\n const firstStart = segmentInfo.cues[0].startTime;\n const lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n playlist.syncInfo = {\n mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n time: Math.min(firstStart, lastStart - segment.duration)\n };\n }\n }\n }\n\n /**\n * @file ad-cue-tags.js\n */\n /**\n * Searches for an ad cue that overlaps with the given mediaTime\n *\n * @param {Object} track\n * the track to find the cue for\n *\n * @param {number} mediaTime\n * the time to find the cue at\n *\n * @return {Object|null}\n * the found cue or null\n */\n\n const findAdCue = function (track, mediaTime) {\n const cues = track.cues;\n for (let i = 0; i < cues.length; i++) {\n const cue = cues[i];\n if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n return cue;\n }\n }\n return null;\n };\n const updateAdCues = function (media, track, offset = 0) {\n if (!media.segments) {\n return;\n }\n let mediaTime = offset;\n let cue;\n for (let i = 0; i < media.segments.length; i++) {\n const segment = media.segments[i];\n if (!cue) {\n // Since the cues will span for at least the segment duration, adding a fudge\n // factor of half segment duration will prevent duplicate cues from being\n // created when timing info is not exact (e.g. cue start time initialized\n // at 10.006677, but next call mediaTime is 10.003332 )\n cue = findAdCue(track, mediaTime + segment.duration / 2);\n }\n if (cue) {\n if ('cueIn' in segment) {\n // Found a CUE-IN so end the cue\n cue.endTime = mediaTime;\n cue.adEndTime = mediaTime;\n mediaTime += segment.duration;\n cue = null;\n continue;\n }\n if (mediaTime < cue.endTime) {\n // Already processed this mediaTime for this cue\n mediaTime += segment.duration;\n continue;\n } // otherwise extend cue until a CUE-IN is found\n\n cue.endTime += segment.duration;\n } else {\n if ('cueOut' in segment) {\n cue = new window.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n cue.adStartTime = mediaTime; // Assumes tag format to be\n // #EXT-X-CUE-OUT:30\n\n cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n track.addCue(cue);\n }\n if ('cueOutCont' in segment) {\n // Entered into the middle of an ad cue\n // Assumes tag formate to be\n // #EXT-X-CUE-OUT-CONT:10/30\n const [adOffset, adTotal] = segment.cueOutCont.split('/').map(parseFloat);\n cue = new window.VTTCue(mediaTime, mediaTime + segment.duration, '');\n cue.adStartTime = mediaTime - adOffset;\n cue.adEndTime = cue.adStartTime + adTotal;\n track.addCue(cue);\n }\n }\n mediaTime += segment.duration;\n }\n };\n\n /**\n * @file sync-controller.js\n */\n // synchronize expired playlist segments.\n // the max media sequence diff is 48 hours of live stream\n // content with two second segments. Anything larger than that\n // will likely be invalid.\n\n const MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC = 86400;\n const syncPointStrategies = [\n // Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n // the equivalence display-time 0 === segment-index 0\n {\n name: 'VOD',\n run: (syncController, playlist, duration, currentTimeline, currentTime) => {\n if (duration !== Infinity) {\n const syncPoint = {\n time: 0,\n segmentIndex: 0,\n partIndex: null\n };\n return syncPoint;\n }\n return null;\n }\n },\n // Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n {\n name: 'ProgramDateTime',\n run: (syncController, playlist, duration, currentTimeline, currentTime) => {\n if (!Object.keys(syncController.timelineToDatetimeMappings).length) {\n return null;\n }\n let syncPoint = null;\n let lastDistance = null;\n const partsAndSegments = getPartsAndSegments(playlist);\n currentTime = currentTime || 0;\n for (let i = 0; i < partsAndSegments.length; i++) {\n // start from the end and loop backwards for live\n // or start from the front and loop forwards for non-live\n const index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n const partAndSegment = partsAndSegments[index];\n const segment = partAndSegment.segment;\n const datetimeMapping = syncController.timelineToDatetimeMappings[segment.timeline];\n if (!datetimeMapping || !segment.dateTimeObject) {\n continue;\n }\n const segmentTime = segment.dateTimeObject.getTime() / 1000;\n let start = segmentTime + datetimeMapping; // take part duration into account.\n\n if (segment.parts && typeof partAndSegment.partIndex === 'number') {\n for (let z = 0; z < partAndSegment.partIndex; z++) {\n start += segment.parts[z].duration;\n }\n }\n const distance = Math.abs(currentTime - start); // Once the distance begins to increase, or if distance is 0, we have passed\n // currentTime and can stop looking for better candidates\n\n if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {\n break;\n }\n lastDistance = distance;\n syncPoint = {\n time: start,\n segmentIndex: partAndSegment.segmentIndex,\n partIndex: partAndSegment.partIndex\n };\n }\n return syncPoint;\n }\n },\n // Stategy \"Segment\": We have a known time mapping for a timeline and a\n // segment in the current timeline with timing data\n {\n name: 'Segment',\n run: (syncController, playlist, duration, currentTimeline, currentTime) => {\n let syncPoint = null;\n let lastDistance = null;\n currentTime = currentTime || 0;\n const partsAndSegments = getPartsAndSegments(playlist);\n for (let i = 0; i < partsAndSegments.length; i++) {\n // start from the end and loop backwards for live\n // or start from the front and loop forwards for non-live\n const index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n const partAndSegment = partsAndSegments[index];\n const segment = partAndSegment.segment;\n const start = partAndSegment.part && partAndSegment.part.start || segment && segment.start;\n if (segment.timeline === currentTimeline && typeof start !== 'undefined') {\n const distance = Math.abs(currentTime - start); // Once the distance begins to increase, we have passed\n // currentTime and can stop looking for better candidates\n\n if (lastDistance !== null && lastDistance < distance) {\n break;\n }\n if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n lastDistance = distance;\n syncPoint = {\n time: start,\n segmentIndex: partAndSegment.segmentIndex,\n partIndex: partAndSegment.partIndex\n };\n }\n }\n }\n return syncPoint;\n }\n },\n // Stategy \"Discontinuity\": We have a discontinuity with a known\n // display-time\n {\n name: 'Discontinuity',\n run: (syncController, playlist, duration, currentTimeline, currentTime) => {\n let syncPoint = null;\n currentTime = currentTime || 0;\n if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n let lastDistance = null;\n for (let i = 0; i < playlist.discontinuityStarts.length; i++) {\n const segmentIndex = playlist.discontinuityStarts[i];\n const discontinuity = playlist.discontinuitySequence + i + 1;\n const discontinuitySync = syncController.discontinuities[discontinuity];\n if (discontinuitySync) {\n const distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed\n // currentTime and can stop looking for better candidates\n\n if (lastDistance !== null && lastDistance < distance) {\n break;\n }\n if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n lastDistance = distance;\n syncPoint = {\n time: discontinuitySync.time,\n segmentIndex,\n partIndex: null\n };\n }\n }\n }\n }\n return syncPoint;\n }\n },\n // Stategy \"Playlist\": We have a playlist with a known mapping of\n // segment index to display time\n {\n name: 'Playlist',\n run: (syncController, playlist, duration, currentTimeline, currentTime) => {\n if (playlist.syncInfo) {\n const syncPoint = {\n time: playlist.syncInfo.time,\n segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence,\n partIndex: null\n };\n return syncPoint;\n }\n return null;\n }\n }];\n class SyncController extends videojs.EventTarget {\n constructor(options = {}) {\n super(); // ...for synching across variants\n\n this.timelines = [];\n this.discontinuities = [];\n this.timelineToDatetimeMappings = {};\n this.logger_ = logger('SyncController');\n }\n /**\n * Find a sync-point for the playlist specified\n *\n * A sync-point is defined as a known mapping from display-time to\n * a segment-index in the current playlist.\n *\n * @param {Playlist} playlist\n * The playlist that needs a sync-point\n * @param {number} duration\n * Duration of the MediaSource (Infinite if playing a live source)\n * @param {number} currentTimeline\n * The last timeline from which a segment was loaded\n * @return {Object}\n * A sync-point object\n */\n\n getSyncPoint(playlist, duration, currentTimeline, currentTime) {\n const syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime);\n if (!syncPoints.length) {\n // Signal that we need to attempt to get a sync-point manually\n // by fetching a segment in the playlist and constructing\n // a sync-point from that information\n return null;\n } // Now find the sync-point that is closest to the currentTime because\n // that should result in the most accurate guess about which segment\n // to fetch\n\n return this.selectSyncPoint_(syncPoints, {\n key: 'time',\n value: currentTime\n });\n }\n /**\n * Calculate the amount of time that has expired off the playlist during playback\n *\n * @param {Playlist} playlist\n * Playlist object to calculate expired from\n * @param {number} duration\n * Duration of the MediaSource (Infinity if playling a live source)\n * @return {number|null}\n * The amount of time that has expired off the playlist during playback. Null\n * if no sync-points for the playlist can be found.\n */\n\n getExpiredTime(playlist, duration) {\n if (!playlist || !playlist.segments) {\n return null;\n }\n const syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time\n\n if (!syncPoints.length) {\n return null;\n }\n const syncPoint = this.selectSyncPoint_(syncPoints, {\n key: 'segmentIndex',\n value: 0\n }); // If the sync-point is beyond the start of the playlist, we want to subtract the\n // duration from index 0 to syncPoint.segmentIndex instead of adding.\n\n if (syncPoint.segmentIndex > 0) {\n syncPoint.time *= -1;\n }\n return Math.abs(syncPoint.time + sumDurations({\n defaultDuration: playlist.targetDuration,\n durationList: playlist.segments,\n startIndex: syncPoint.segmentIndex,\n endIndex: 0\n }));\n }\n /**\n * Runs each sync-point strategy and returns a list of sync-points returned by the\n * strategies\n *\n * @private\n * @param {Playlist} playlist\n * The playlist that needs a sync-point\n * @param {number} duration\n * Duration of the MediaSource (Infinity if playing a live source)\n * @param {number} currentTimeline\n * The last timeline from which a segment was loaded\n * @return {Array}\n * A list of sync-point objects\n */\n\n runStrategies_(playlist, duration, currentTimeline, currentTime) {\n const syncPoints = []; // Try to find a sync-point in by utilizing various strategies...\n\n for (let i = 0; i < syncPointStrategies.length; i++) {\n const strategy = syncPointStrategies[i];\n const syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime);\n if (syncPoint) {\n syncPoint.strategy = strategy.name;\n syncPoints.push({\n strategy: strategy.name,\n syncPoint\n });\n }\n }\n return syncPoints;\n }\n /**\n * Selects the sync-point nearest the specified target\n *\n * @private\n * @param {Array} syncPoints\n * List of sync-points to select from\n * @param {Object} target\n * Object specifying the property and value we are targeting\n * @param {string} target.key\n * Specifies the property to target. Must be either 'time' or 'segmentIndex'\n * @param {number} target.value\n * The value to target for the specified key.\n * @return {Object}\n * The sync-point nearest the target\n */\n\n selectSyncPoint_(syncPoints, target) {\n let bestSyncPoint = syncPoints[0].syncPoint;\n let bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n let bestStrategy = syncPoints[0].strategy;\n for (let i = 1; i < syncPoints.length; i++) {\n const newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n if (newDistance < bestDistance) {\n bestDistance = newDistance;\n bestSyncPoint = syncPoints[i].syncPoint;\n bestStrategy = syncPoints[i].strategy;\n }\n }\n this.logger_(`syncPoint for [${target.key}: ${target.value}] chosen with strategy` + ` [${bestStrategy}]: [time:${bestSyncPoint.time},` + ` segmentIndex:${bestSyncPoint.segmentIndex}` + (typeof bestSyncPoint.partIndex === 'number' ? `,partIndex:${bestSyncPoint.partIndex}` : '') + ']');\n return bestSyncPoint;\n }\n /**\n * Save any meta-data present on the segments when segments leave\n * the live window to the playlist to allow for synchronization at the\n * playlist level later.\n *\n * @param {Playlist} oldPlaylist - The previous active playlist\n * @param {Playlist} newPlaylist - The updated and most current playlist\n */\n\n saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n const mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // Ignore large media sequence gaps\n\n if (mediaSequenceDiff > MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC) {\n videojs.log.warn(`Not saving expired segment info. Media sequence gap ${mediaSequenceDiff} is too large.`);\n return;\n } // When a segment expires from the playlist and it has a start time\n // save that information as a possible sync-point reference in future\n\n for (let i = mediaSequenceDiff - 1; i >= 0; i--) {\n const lastRemovedSegment = oldPlaylist.segments[i];\n if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n newPlaylist.syncInfo = {\n mediaSequence: oldPlaylist.mediaSequence + i,\n time: lastRemovedSegment.start\n };\n this.logger_(`playlist refresh sync: [time:${newPlaylist.syncInfo.time},` + ` mediaSequence: ${newPlaylist.syncInfo.mediaSequence}]`);\n this.trigger('syncinfoupdate');\n break;\n }\n }\n }\n /**\n * Save the mapping from playlist's ProgramDateTime to display. This should only happen\n * before segments start to load.\n *\n * @param {Playlist} playlist - The currently active playlist\n */\n\n setDateTimeMappingForStart(playlist) {\n // It's possible for the playlist to be updated before playback starts, meaning time\n // zero is not yet set. If, during these playlist refreshes, a discontinuity is\n // crossed, then the old time zero mapping (for the prior timeline) would be retained\n // unless the mappings are cleared.\n this.timelineToDatetimeMappings = {};\n if (playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {\n const firstSegment = playlist.segments[0];\n const playlistTimestamp = firstSegment.dateTimeObject.getTime() / 1000;\n this.timelineToDatetimeMappings[firstSegment.timeline] = -playlistTimestamp;\n }\n }\n /**\n * Calculates and saves timeline mappings, playlist sync info, and segment timing values\n * based on the latest timing information.\n *\n * @param {Object} options\n * Options object\n * @param {SegmentInfo} options.segmentInfo\n * The current active request information\n * @param {boolean} options.shouldSaveTimelineMapping\n * If there's a timeline change, determines if the timeline mapping should be\n * saved for timeline mapping and program date time mappings.\n */\n\n saveSegmentTimingInfo({\n segmentInfo,\n shouldSaveTimelineMapping\n }) {\n const didCalculateSegmentTimeMapping = this.calculateSegmentTimeMapping_(segmentInfo, segmentInfo.timingInfo, shouldSaveTimelineMapping);\n const segment = segmentInfo.segment;\n if (didCalculateSegmentTimeMapping) {\n this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information\n // now with segment timing information\n\n if (!segmentInfo.playlist.syncInfo) {\n segmentInfo.playlist.syncInfo = {\n mediaSequence: segmentInfo.playlist.mediaSequence + segmentInfo.mediaIndex,\n time: segment.start\n };\n }\n }\n const dateTime = segment.dateTimeObject;\n if (segment.discontinuity && shouldSaveTimelineMapping && dateTime) {\n this.timelineToDatetimeMappings[segment.timeline] = -(dateTime.getTime() / 1000);\n }\n }\n timestampOffsetForTimeline(timeline) {\n if (typeof this.timelines[timeline] === 'undefined') {\n return null;\n }\n return this.timelines[timeline].time;\n }\n mappingForTimeline(timeline) {\n if (typeof this.timelines[timeline] === 'undefined') {\n return null;\n }\n return this.timelines[timeline].mapping;\n }\n /**\n * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n * save that display time to the segment.\n *\n * @private\n * @param {SegmentInfo} segmentInfo\n * The current active request information\n * @param {Object} timingInfo\n * The start and end time of the current segment in \"media time\"\n * @param {boolean} shouldSaveTimelineMapping\n * If there's a timeline change, determines if the timeline mapping should be\n * saved in timelines.\n * @return {boolean}\n * Returns false if segment time mapping could not be calculated\n */\n\n calculateSegmentTimeMapping_(segmentInfo, timingInfo, shouldSaveTimelineMapping) {\n // TODO: remove side effects\n const segment = segmentInfo.segment;\n const part = segmentInfo.part;\n let mappingObj = this.timelines[segmentInfo.timeline];\n let start;\n let end;\n if (typeof segmentInfo.timestampOffset === 'number') {\n mappingObj = {\n time: segmentInfo.startOfSegment,\n mapping: segmentInfo.startOfSegment - timingInfo.start\n };\n if (shouldSaveTimelineMapping) {\n this.timelines[segmentInfo.timeline] = mappingObj;\n this.trigger('timestampoffset');\n this.logger_(`time mapping for timeline ${segmentInfo.timeline}: ` + `[time: ${mappingObj.time}] [mapping: ${mappingObj.mapping}]`);\n }\n start = segmentInfo.startOfSegment;\n end = timingInfo.end + mappingObj.mapping;\n } else if (mappingObj) {\n start = timingInfo.start + mappingObj.mapping;\n end = timingInfo.end + mappingObj.mapping;\n } else {\n return false;\n }\n if (part) {\n part.start = start;\n part.end = end;\n } // If we don't have a segment start yet or the start value we got\n // is less than our current segment.start value, save a new start value.\n // We have to do this because parts will have segment timing info saved\n // multiple times and we want segment start to be the earliest part start\n // value for that segment.\n\n if (!segment.start || start < segment.start) {\n segment.start = start;\n }\n segment.end = end;\n return true;\n }\n /**\n * Each time we have discontinuity in the playlist, attempt to calculate the location\n * in display of the start of the discontinuity and save that. We also save an accuracy\n * value so that we save values with the most accuracy (closest to 0.)\n *\n * @private\n * @param {SegmentInfo} segmentInfo - The current active request information\n */\n\n saveDiscontinuitySyncInfo_(segmentInfo) {\n const playlist = segmentInfo.playlist;\n const segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where\n // the start of the range and it's accuracy is 0 (greater accuracy values\n // mean more approximation)\n\n if (segment.discontinuity) {\n this.discontinuities[segment.timeline] = {\n time: segment.start,\n accuracy: 0\n };\n } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n // Search for future discontinuities that we can provide better timing\n // information for and save that information for sync purposes\n for (let i = 0; i < playlist.discontinuityStarts.length; i++) {\n const segmentIndex = playlist.discontinuityStarts[i];\n const discontinuity = playlist.discontinuitySequence + i + 1;\n const mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n const accuracy = Math.abs(mediaIndexDiff);\n if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n let time;\n if (mediaIndexDiff < 0) {\n time = segment.start - sumDurations({\n defaultDuration: playlist.targetDuration,\n durationList: playlist.segments,\n startIndex: segmentInfo.mediaIndex,\n endIndex: segmentIndex\n });\n } else {\n time = segment.end + sumDurations({\n defaultDuration: playlist.targetDuration,\n durationList: playlist.segments,\n startIndex: segmentInfo.mediaIndex + 1,\n endIndex: segmentIndex\n });\n }\n this.discontinuities[discontinuity] = {\n time,\n accuracy\n };\n }\n }\n }\n }\n dispose() {\n this.trigger('dispose');\n this.off();\n }\n }\n\n /**\n * The TimelineChangeController acts as a source for segment loaders to listen for and\n * keep track of latest and pending timeline changes. This is useful to ensure proper\n * sync, as each loader may need to make a consideration for what timeline the other\n * loader is on before making changes which could impact the other loader's media.\n *\n * @class TimelineChangeController\n * @extends videojs.EventTarget\n */\n\n class TimelineChangeController extends videojs.EventTarget {\n constructor() {\n super();\n this.pendingTimelineChanges_ = {};\n this.lastTimelineChanges_ = {};\n }\n clearPendingTimelineChange(type) {\n this.pendingTimelineChanges_[type] = null;\n this.trigger('pendingtimelinechange');\n }\n pendingTimelineChange({\n type,\n from,\n to\n }) {\n if (typeof from === 'number' && typeof to === 'number') {\n this.pendingTimelineChanges_[type] = {\n type,\n from,\n to\n };\n this.trigger('pendingtimelinechange');\n }\n return this.pendingTimelineChanges_[type];\n }\n lastTimelineChange({\n type,\n from,\n to\n }) {\n if (typeof from === 'number' && typeof to === 'number') {\n this.lastTimelineChanges_[type] = {\n type,\n from,\n to\n };\n delete this.pendingTimelineChanges_[type];\n this.trigger('timelinechange');\n }\n return this.lastTimelineChanges_[type];\n }\n dispose() {\n this.trigger('dispose');\n this.pendingTimelineChanges_ = {};\n this.lastTimelineChanges_ = {};\n this.off();\n }\n }\n\n /* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n const workerCode = transform(getWorkerString(function () {\n /**\n * @file stream.js\n */\n\n /**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\n\n var Stream = /*#__PURE__*/function () {\n function Stream() {\n this.listeners = {};\n }\n /**\n * Add a listener for a specified event type.\n *\n * @param {string} type the event name\n * @param {Function} listener the callback to be invoked when an event of\n * the specified type occurs\n */\n\n var _proto = Stream.prototype;\n _proto.on = function on(type, listener) {\n if (!this.listeners[type]) {\n this.listeners[type] = [];\n }\n this.listeners[type].push(listener);\n }\n /**\n * Remove a listener for a specified event type.\n *\n * @param {string} type the event name\n * @param {Function} listener a function previously registered for this\n * type of event through `on`\n * @return {boolean} if we could turn it off or not\n */;\n\n _proto.off = function off(type, listener) {\n if (!this.listeners[type]) {\n return false;\n }\n var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n // In Video.js we slice listener functions\n // on trigger so that it does not mess up the order\n // while we loop through.\n //\n // Here we slice on off so that the loop in trigger\n // can continue using it's old reference to loop without\n // messing up the order.\n\n this.listeners[type] = this.listeners[type].slice(0);\n this.listeners[type].splice(index, 1);\n return index > -1;\n }\n /**\n * Trigger an event of the specified type on this stream. Any additional\n * arguments to this function are passed as parameters to event listeners.\n *\n * @param {string} type the event name\n */;\n\n _proto.trigger = function trigger(type) {\n var callbacks = this.listeners[type];\n if (!callbacks) {\n return;\n } // Slicing the arguments on every invocation of this method\n // can add a significant amount of overhead. Avoid the\n // intermediate object creation for the common case of a\n // single callback argument\n\n if (arguments.length === 2) {\n var length = callbacks.length;\n for (var i = 0; i < length; ++i) {\n callbacks[i].call(this, arguments[1]);\n }\n } else {\n var args = Array.prototype.slice.call(arguments, 1);\n var _length = callbacks.length;\n for (var _i = 0; _i < _length; ++_i) {\n callbacks[_i].apply(this, args);\n }\n }\n }\n /**\n * Destroys the stream and cleans up.\n */;\n\n _proto.dispose = function dispose() {\n this.listeners = {};\n }\n /**\n * Forwards all `data` events on this stream to the destination stream. The\n * destination stream should provide a method `push` to receive the data\n * events as they arrive.\n *\n * @param {Stream} destination the stream that will receive all `data` events\n * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n */;\n\n _proto.pipe = function pipe(destination) {\n this.on('data', function (data) {\n destination.push(data);\n });\n };\n return Stream;\n }();\n /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */\n\n /**\n * Returns the subarray of a Uint8Array without PKCS#7 padding.\n *\n * @param padded {Uint8Array} unencrypted bytes that have been padded\n * @return {Uint8Array} the unpadded bytes\n * @see http://tools.ietf.org/html/rfc5652\n */\n\n function unpad(padded) {\n return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n }\n /*! @name aes-decrypter @version 4.0.1 @license Apache-2.0 */\n\n /**\n * @file aes.js\n *\n * This file contains an adaptation of the AES decryption algorithm\n * from the Standford Javascript Cryptography Library. That work is\n * covered by the following copyright and permissions notice:\n *\n * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n * All rights reserved.\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * 1. Redistributions of source code must retain the above copyright\n * notice, this list of conditions and the following disclaimer.\n *\n * 2. Redistributions in binary form must reproduce the above\n * copyright notice, this list of conditions and the following\n * disclaimer in the documentation and/or other materials provided\n * with the distribution.\n *\n * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *\n * The views and conclusions contained in the software and documentation\n * are those of the authors and should not be interpreted as representing\n * official policies, either expressed or implied, of the authors.\n */\n\n /**\n * Expand the S-box tables.\n *\n * @private\n */\n\n const precompute = function () {\n const tables = [[[], [], [], [], []], [[], [], [], [], []]];\n const encTable = tables[0];\n const decTable = tables[1];\n const sbox = encTable[4];\n const sboxInv = decTable[4];\n let i;\n let x;\n let xInv;\n const d = [];\n const th = [];\n let x2;\n let x4;\n let x8;\n let s;\n let tEnc;\n let tDec; // Compute double and third tables\n\n for (i = 0; i < 256; i++) {\n th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n }\n for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n // Compute sbox\n s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n s = s >> 8 ^ s & 255 ^ 99;\n sbox[x] = s;\n sboxInv[s] = x; // Compute MixColumns\n\n x8 = d[x4 = d[x2 = d[x]]];\n tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n tEnc = d[s] * 0x101 ^ s * 0x1010100;\n for (i = 0; i < 4; i++) {\n encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n }\n } // Compactify. Considerable speedup on Firefox.\n\n for (i = 0; i < 5; i++) {\n encTable[i] = encTable[i].slice(0);\n decTable[i] = decTable[i].slice(0);\n }\n return tables;\n };\n let aesTables = null;\n /**\n * Schedule out an AES key for both encryption and decryption. This\n * is a low-level class. Use a cipher mode to do bulk encryption.\n *\n * @class AES\n * @param key {Array} The key as an array of 4, 6 or 8 words.\n */\n\n class AES {\n constructor(key) {\n /**\n * The expanded S-box and inverse S-box tables. These will be computed\n * on the client so that we don't have to send them down the wire.\n *\n * There are two tables, _tables[0] is for encryption and\n * _tables[1] is for decryption.\n *\n * The first 4 sub-tables are the expanded S-box with MixColumns. The\n * last (_tables[01][4]) is the S-box itself.\n *\n * @private\n */\n // if we have yet to precompute the S-box tables\n // do so now\n if (!aesTables) {\n aesTables = precompute();\n } // then make a copy of that object for use\n\n this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n let i;\n let j;\n let tmp;\n const sbox = this._tables[0][4];\n const decTable = this._tables[1];\n const keyLen = key.length;\n let rcon = 1;\n if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n throw new Error('Invalid aes key size');\n }\n const encKey = key.slice(0);\n const decKey = [];\n this._key = [encKey, decKey]; // schedule encryption keys\n\n for (i = keyLen; i < 4 * keyLen + 28; i++) {\n tmp = encKey[i - 1]; // apply sbox\n\n if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n if (i % keyLen === 0) {\n tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n rcon = rcon << 1 ^ (rcon >> 7) * 283;\n }\n }\n encKey[i] = encKey[i - keyLen] ^ tmp;\n } // schedule decryption keys\n\n for (j = 0; i; j++, i--) {\n tmp = encKey[j & 3 ? i : i - 4];\n if (i <= 4 || j < 4) {\n decKey[j] = tmp;\n } else {\n decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n }\n }\n }\n /**\n * Decrypt 16 bytes, specified as four 32-bit words.\n *\n * @param {number} encrypted0 the first word to decrypt\n * @param {number} encrypted1 the second word to decrypt\n * @param {number} encrypted2 the third word to decrypt\n * @param {number} encrypted3 the fourth word to decrypt\n * @param {Int32Array} out the array to write the decrypted words\n * into\n * @param {number} offset the offset into the output array to start\n * writing results\n * @return {Array} The plaintext.\n */\n\n decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n const key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n let a = encrypted0 ^ key[0];\n let b = encrypted3 ^ key[1];\n let c = encrypted2 ^ key[2];\n let d = encrypted1 ^ key[3];\n let a2;\n let b2;\n let c2; // key.length === 2 ?\n\n const nInnerRounds = key.length / 4 - 2;\n let i;\n let kIndex = 4;\n const table = this._tables[1]; // load up the tables\n\n const table0 = table[0];\n const table1 = table[1];\n const table2 = table[2];\n const table3 = table[3];\n const sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n for (i = 0; i < nInnerRounds; i++) {\n a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n kIndex += 4;\n a = a2;\n b = b2;\n c = c2;\n } // Last round.\n\n for (i = 0; i < 4; i++) {\n out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n a2 = a;\n a = b;\n b = c;\n c = d;\n d = a2;\n }\n }\n }\n /**\n * @file async-stream.js\n */\n\n /**\n * A wrapper around the Stream class to use setTimeout\n * and run stream \"jobs\" Asynchronously\n *\n * @class AsyncStream\n * @extends Stream\n */\n\n class AsyncStream extends Stream {\n constructor() {\n super(Stream);\n this.jobs = [];\n this.delay = 1;\n this.timeout_ = null;\n }\n /**\n * process an async job\n *\n * @private\n */\n\n processJob_() {\n this.jobs.shift()();\n if (this.jobs.length) {\n this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n } else {\n this.timeout_ = null;\n }\n }\n /**\n * push a job into the stream\n *\n * @param {Function} job the job to push into the stream\n */\n\n push(job) {\n this.jobs.push(job);\n if (!this.timeout_) {\n this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n }\n }\n }\n /**\n * @file decrypter.js\n *\n * An asynchronous implementation of AES-128 CBC decryption with\n * PKCS#7 padding.\n */\n\n /**\n * Convert network-order (big-endian) bytes into their little-endian\n * representation.\n */\n\n const ntoh = function (word) {\n return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n };\n /**\n * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n *\n * @param {Uint8Array} encrypted the encrypted bytes\n * @param {Uint32Array} key the bytes of the decryption key\n * @param {Uint32Array} initVector the initialization vector (IV) to\n * use for the first round of CBC.\n * @return {Uint8Array} the decrypted bytes\n *\n * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n * @see https://tools.ietf.org/html/rfc2315\n */\n\n const decrypt = function (encrypted, key, initVector) {\n // word-level access to the encrypted bytes\n const encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n const decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n const decrypted = new Uint8Array(encrypted.byteLength);\n const decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n // decrypted data\n\n let init0;\n let init1;\n let init2;\n let init3;\n let encrypted0;\n let encrypted1;\n let encrypted2;\n let encrypted3; // iteration variable\n\n let wordIx; // pull out the words of the IV to ensure we don't modify the\n // passed-in reference and easier access\n\n init0 = initVector[0];\n init1 = initVector[1];\n init2 = initVector[2];\n init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n // to each decrypted block\n\n for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n // convert big-endian (network order) words into little-endian\n // (javascript order)\n encrypted0 = ntoh(encrypted32[wordIx]);\n encrypted1 = ntoh(encrypted32[wordIx + 1]);\n encrypted2 = ntoh(encrypted32[wordIx + 2]);\n encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n // plaintext\n\n decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n init0 = encrypted0;\n init1 = encrypted1;\n init2 = encrypted2;\n init3 = encrypted3;\n }\n return decrypted;\n };\n /**\n * The `Decrypter` class that manages decryption of AES\n * data through `AsyncStream` objects and the `decrypt`\n * function\n *\n * @param {Uint8Array} encrypted the encrypted bytes\n * @param {Uint32Array} key the bytes of the decryption key\n * @param {Uint32Array} initVector the initialization vector (IV) to\n * @param {Function} done the function to run when done\n * @class Decrypter\n */\n\n class Decrypter {\n constructor(encrypted, key, initVector, done) {\n const step = Decrypter.STEP;\n const encrypted32 = new Int32Array(encrypted.buffer);\n const decrypted = new Uint8Array(encrypted.byteLength);\n let i = 0;\n this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously\n\n this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n for (i = step; i < encrypted32.length; i += step) {\n initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n } // invoke the done() callback when everything is finished\n\n this.asyncStream_.push(function () {\n // remove pkcs#7 padding from the decrypted bytes\n done(null, unpad(decrypted));\n });\n }\n /**\n * a getter for step the maximum number of bytes to process at one time\n *\n * @return {number} the value of step 32000\n */\n\n static get STEP() {\n // 4 * 8000;\n return 32000;\n }\n /**\n * @private\n */\n\n decryptChunk_(encrypted, key, initVector, decrypted) {\n return function () {\n const bytes = decrypt(encrypted, key, initVector);\n decrypted.set(bytes, encrypted.byteOffset);\n };\n }\n }\n var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n var win;\n if (typeof window !== \"undefined\") {\n win = window;\n } else if (typeof commonjsGlobal !== \"undefined\") {\n win = commonjsGlobal;\n } else if (typeof self !== \"undefined\") {\n win = self;\n } else {\n win = {};\n }\n var window_1 = win;\n var isArrayBufferView = function isArrayBufferView(obj) {\n if (ArrayBuffer.isView === 'function') {\n return ArrayBuffer.isView(obj);\n }\n return obj && obj.buffer instanceof ArrayBuffer;\n };\n var BigInt = window_1.BigInt || Number;\n [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\n (function () {\n var a = new Uint16Array([0xFFCC]);\n var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);\n if (b[0] === 0xFF) {\n return 'big';\n }\n if (b[0] === 0xCC) {\n return 'little';\n }\n return 'unknown';\n })();\n /**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n * Object of properties and values to send to the web worker\n * @return {Object}\n * Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n const createTransferableMessage = function (message) {\n const transferable = {};\n Object.keys(message).forEach(key => {\n const value = message[key];\n if (isArrayBufferView(value)) {\n transferable[key] = {\n bytes: value.buffer,\n byteOffset: value.byteOffset,\n byteLength: value.byteLength\n };\n } else {\n transferable[key] = value;\n }\n });\n return transferable;\n };\n /* global self */\n\n /**\n * Our web worker interface so that things can talk to aes-decrypter\n * that will be running in a web worker. the scope is passed to this by\n * webworkify.\n */\n\n self.onmessage = function (event) {\n const data = event.data;\n const encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n const key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n const iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n /* eslint-disable no-new, handle-callback-err */\n\n new Decrypter(encrypted, key, iv, function (err, bytes) {\n self.postMessage(createTransferableMessage({\n source: data.source,\n decrypted: bytes\n }), [bytes.buffer]);\n });\n /* eslint-enable */\n };\n }));\n\n var Decrypter = factory(workerCode);\n /* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n\n /**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\n\n const audioTrackKind_ = properties => {\n let kind = properties.default ? 'main' : 'alternative';\n if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n kind = 'main-desc';\n }\n return kind;\n };\n /**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n * SegmentLoader to pause\n * @param {Object} mediaType\n * Active media type\n * @function stopLoaders\n */\n\n const stopLoaders = (segmentLoader, mediaType) => {\n segmentLoader.abort();\n segmentLoader.pause();\n if (mediaType && mediaType.activePlaylistLoader) {\n mediaType.activePlaylistLoader.pause();\n mediaType.activePlaylistLoader = null;\n }\n };\n /**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n * PlaylistLoader to start loading\n * @param {Object} mediaType\n * Active media type\n * @function startLoaders\n */\n\n const startLoaders = (playlistLoader, mediaType) => {\n // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n // playlist loader\n mediaType.activePlaylistLoader = playlistLoader;\n playlistLoader.load();\n };\n /**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Handler for a non-destructive resync of SegmentLoader when the active media\n * group changes.\n * @function onGroupChanged\n */\n\n const onGroupChanged = (type, settings) => () => {\n const {\n segmentLoaders: {\n [type]: segmentLoader,\n main: mainSegmentLoader\n },\n mediaTypes: {\n [type]: mediaType\n }\n } = settings;\n const activeTrack = mediaType.activeTrack();\n const activeGroup = mediaType.getActiveGroup();\n const previousActiveLoader = mediaType.activePlaylistLoader;\n const lastGroup = mediaType.lastGroup_; // the group did not change do nothing\n\n if (activeGroup && lastGroup && activeGroup.id === lastGroup.id) {\n return;\n }\n mediaType.lastGroup_ = activeGroup;\n mediaType.lastTrack_ = activeTrack;\n stopLoaders(segmentLoader, mediaType);\n if (!activeGroup || activeGroup.isMainPlaylist) {\n // there is no group active or active group is a main playlist and won't change\n return;\n }\n if (!activeGroup.playlistLoader) {\n if (previousActiveLoader) {\n // The previous group had a playlist loader but the new active group does not\n // this means we are switching from demuxed to muxed audio. In this case we want to\n // do a destructive reset of the main segment loader and not restart the audio\n // loaders.\n mainSegmentLoader.resetEverything();\n }\n return;\n } // Non-destructive resync\n\n segmentLoader.resyncLoader();\n startLoaders(activeGroup.playlistLoader, mediaType);\n };\n const onGroupChanging = (type, settings) => () => {\n const {\n segmentLoaders: {\n [type]: segmentLoader\n },\n mediaTypes: {\n [type]: mediaType\n }\n } = settings;\n mediaType.lastGroup_ = null;\n segmentLoader.abort();\n segmentLoader.pause();\n };\n /**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Handler for a destructive reset of SegmentLoader when the active media\n * track changes.\n * @function onTrackChanged\n */\n\n const onTrackChanged = (type, settings) => () => {\n const {\n mainPlaylistLoader,\n segmentLoaders: {\n [type]: segmentLoader,\n main: mainSegmentLoader\n },\n mediaTypes: {\n [type]: mediaType\n }\n } = settings;\n const activeTrack = mediaType.activeTrack();\n const activeGroup = mediaType.getActiveGroup();\n const previousActiveLoader = mediaType.activePlaylistLoader;\n const lastTrack = mediaType.lastTrack_; // track did not change, do nothing\n\n if (lastTrack && activeTrack && lastTrack.id === activeTrack.id) {\n return;\n }\n mediaType.lastGroup_ = activeGroup;\n mediaType.lastTrack_ = activeTrack;\n stopLoaders(segmentLoader, mediaType);\n if (!activeGroup) {\n // there is no group active so we do not want to restart loaders\n return;\n }\n if (activeGroup.isMainPlaylist) {\n // track did not change, do nothing\n if (!activeTrack || !lastTrack || activeTrack.id === lastTrack.id) {\n return;\n }\n const pc = settings.vhs.playlistController_;\n const newPlaylist = pc.selectPlaylist(); // media will not change do nothing\n\n if (pc.media() === newPlaylist) {\n return;\n }\n mediaType.logger_(`track change. Switching main audio from ${lastTrack.id} to ${activeTrack.id}`);\n mainPlaylistLoader.pause();\n mainSegmentLoader.resetEverything();\n pc.fastQualityChange_(newPlaylist);\n return;\n }\n if (type === 'AUDIO') {\n if (!activeGroup.playlistLoader) {\n // when switching from demuxed audio/video to muxed audio/video (noted by no\n // playlist loader for the audio group), we want to do a destructive reset of the\n // main segment loader and not restart the audio loaders\n mainSegmentLoader.setAudio(true); // don't have to worry about disabling the audio of the audio segment loader since\n // it should be stopped\n\n mainSegmentLoader.resetEverything();\n return;\n } // although the segment loader is an audio segment loader, call the setAudio\n // function to ensure it is prepared to re-append the init segment (or handle other\n // config changes)\n\n segmentLoader.setAudio(true);\n mainSegmentLoader.setAudio(false);\n }\n if (previousActiveLoader === activeGroup.playlistLoader) {\n // Nothing has actually changed. This can happen because track change events can fire\n // multiple times for a \"single\" change. One for enabling the new active track, and\n // one for disabling the track that was active\n startLoaders(activeGroup.playlistLoader, mediaType);\n return;\n }\n if (segmentLoader.track) {\n // For WebVTT, set the new text track in the segmentloader\n segmentLoader.track(activeTrack);\n } // destructive reset\n\n segmentLoader.resetEverything();\n startLoaders(activeGroup.playlistLoader, mediaType);\n };\n const onError = {\n /**\n * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n * an error.\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Error handler. Logs warning (or error if the playlist is excluded) to\n * console and switches back to default audio track.\n * @function onError.AUDIO\n */\n AUDIO: (type, settings) => () => {\n const {\n segmentLoaders: {\n [type]: segmentLoader\n },\n mediaTypes: {\n [type]: mediaType\n },\n excludePlaylist\n } = settings;\n stopLoaders(segmentLoader, mediaType); // switch back to default audio track\n\n const activeTrack = mediaType.activeTrack();\n const activeGroup = mediaType.activeGroup();\n const id = (activeGroup.filter(group => group.default)[0] || activeGroup[0]).id;\n const defaultTrack = mediaType.tracks[id];\n if (activeTrack === defaultTrack) {\n // Default track encountered an error. All we can do now is exclude the current\n // rendition and hope another will switch audio groups\n excludePlaylist({\n error: {\n message: 'Problem encountered loading the default audio track.'\n }\n });\n return;\n }\n videojs.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n for (const trackId in mediaType.tracks) {\n mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n }\n mediaType.onTrackChanged();\n },\n /**\n * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n * an error.\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Error handler. Logs warning to console and disables the active subtitle track\n * @function onError.SUBTITLES\n */\n SUBTITLES: (type, settings) => () => {\n const {\n segmentLoaders: {\n [type]: segmentLoader\n },\n mediaTypes: {\n [type]: mediaType\n }\n } = settings;\n videojs.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n stopLoaders(segmentLoader, mediaType);\n const track = mediaType.activeTrack();\n if (track) {\n track.mode = 'disabled';\n }\n mediaType.onTrackChanged();\n }\n };\n const setupListeners = {\n /**\n * Setup event listeners for audio playlist loader\n *\n * @param {string} type\n * MediaGroup type\n * @param {PlaylistLoader|null} playlistLoader\n * PlaylistLoader to register listeners on\n * @param {Object} settings\n * Object containing required information for media groups\n * @function setupListeners.AUDIO\n */\n AUDIO: (type, playlistLoader, settings) => {\n if (!playlistLoader) {\n // no playlist loader means audio will be muxed with the video\n return;\n }\n const {\n tech,\n requestOptions,\n segmentLoaders: {\n [type]: segmentLoader\n }\n } = settings;\n playlistLoader.on('loadedmetadata', () => {\n const media = playlistLoader.media();\n segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload\n // permits, start downloading segments\n\n if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n segmentLoader.load();\n }\n });\n playlistLoader.on('loadedplaylist', () => {\n segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n if (!tech.paused()) {\n segmentLoader.load();\n }\n });\n playlistLoader.on('error', onError[type](type, settings));\n },\n /**\n * Setup event listeners for subtitle playlist loader\n *\n * @param {string} type\n * MediaGroup type\n * @param {PlaylistLoader|null} playlistLoader\n * PlaylistLoader to register listeners on\n * @param {Object} settings\n * Object containing required information for media groups\n * @function setupListeners.SUBTITLES\n */\n SUBTITLES: (type, playlistLoader, settings) => {\n const {\n tech,\n requestOptions,\n segmentLoaders: {\n [type]: segmentLoader\n },\n mediaTypes: {\n [type]: mediaType\n }\n } = settings;\n playlistLoader.on('loadedmetadata', () => {\n const media = playlistLoader.media();\n segmentLoader.playlist(media, requestOptions);\n segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload\n // permits, start downloading segments\n\n if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n segmentLoader.load();\n }\n });\n playlistLoader.on('loadedplaylist', () => {\n segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n if (!tech.paused()) {\n segmentLoader.load();\n }\n });\n playlistLoader.on('error', onError[type](type, settings));\n }\n };\n const initialize = {\n /**\n * Setup PlaylistLoaders and AudioTracks for the audio groups\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @function initialize.AUDIO\n */\n 'AUDIO': (type, settings) => {\n const {\n vhs,\n sourceType,\n segmentLoaders: {\n [type]: segmentLoader\n },\n requestOptions,\n main: {\n mediaGroups\n },\n mediaTypes: {\n [type]: {\n groups,\n tracks,\n logger_\n }\n },\n mainPlaylistLoader\n } = settings;\n const audioOnlyMain = isAudioOnly(mainPlaylistLoader.main); // force a default if we have none\n\n if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {\n mediaGroups[type] = {\n main: {\n default: {\n default: true\n }\n }\n };\n if (audioOnlyMain) {\n mediaGroups[type].main.default.playlists = mainPlaylistLoader.main.playlists;\n }\n }\n for (const groupId in mediaGroups[type]) {\n if (!groups[groupId]) {\n groups[groupId] = [];\n }\n for (const variantLabel in mediaGroups[type][groupId]) {\n let properties = mediaGroups[type][groupId][variantLabel];\n let playlistLoader;\n if (audioOnlyMain) {\n logger_(`AUDIO group '${groupId}' label '${variantLabel}' is a main playlist`);\n properties.isMainPlaylist = true;\n playlistLoader = null; // if vhs-json was provided as the source, and the media playlist was resolved,\n // use the resolved media playlist object\n } else if (sourceType === 'vhs-json' && properties.playlists) {\n playlistLoader = new PlaylistLoader(properties.playlists[0], vhs, requestOptions);\n } else if (properties.resolvedUri) {\n playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions); // TODO: dash isn't the only type with properties.playlists\n // should we even have properties.playlists in this check.\n } else if (properties.playlists && sourceType === 'dash') {\n playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, mainPlaylistLoader);\n } else {\n // no resolvedUri means the audio is muxed with the video when using this\n // audio track\n playlistLoader = null;\n }\n properties = merge({\n id: variantLabel,\n playlistLoader\n }, properties);\n setupListeners[type](type, properties.playlistLoader, settings);\n groups[groupId].push(properties);\n if (typeof tracks[variantLabel] === 'undefined') {\n const track = new videojs.AudioTrack({\n id: variantLabel,\n kind: audioTrackKind_(properties),\n enabled: false,\n language: properties.language,\n default: properties.default,\n label: variantLabel\n });\n tracks[variantLabel] = track;\n }\n }\n } // setup single error event handler for the segment loader\n\n segmentLoader.on('error', onError[type](type, settings));\n },\n /**\n * Setup PlaylistLoaders and TextTracks for the subtitle groups\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @function initialize.SUBTITLES\n */\n 'SUBTITLES': (type, settings) => {\n const {\n tech,\n vhs,\n sourceType,\n segmentLoaders: {\n [type]: segmentLoader\n },\n requestOptions,\n main: {\n mediaGroups\n },\n mediaTypes: {\n [type]: {\n groups,\n tracks\n }\n },\n mainPlaylistLoader\n } = settings;\n for (const groupId in mediaGroups[type]) {\n if (!groups[groupId]) {\n groups[groupId] = [];\n }\n for (const variantLabel in mediaGroups[type][groupId]) {\n if (mediaGroups[type][groupId][variantLabel].forced) {\n // Subtitle playlists with the forced attribute are not selectable in Safari.\n // According to Apple's HLS Authoring Specification:\n // If content has forced subtitles and regular subtitles in a given language,\n // the regular subtitles track in that language MUST contain both the forced\n // subtitles and the regular subtitles for that language.\n // Because of this requirement and that Safari does not add forced subtitles,\n // forced subtitles are skipped here to maintain consistent experience across\n // all platforms\n continue;\n }\n let properties = mediaGroups[type][groupId][variantLabel];\n let playlistLoader;\n if (sourceType === 'hls') {\n playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions);\n } else if (sourceType === 'dash') {\n const playlists = properties.playlists.filter(p => p.excludeUntil !== Infinity);\n if (!playlists.length) {\n return;\n }\n playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, mainPlaylistLoader);\n } else if (sourceType === 'vhs-json') {\n playlistLoader = new PlaylistLoader(\n // if the vhs-json object included the media playlist, use the media playlist\n // as provided, otherwise use the resolved URI to load the playlist\n properties.playlists ? properties.playlists[0] : properties.resolvedUri, vhs, requestOptions);\n }\n properties = merge({\n id: variantLabel,\n playlistLoader\n }, properties);\n setupListeners[type](type, properties.playlistLoader, settings);\n groups[groupId].push(properties);\n if (typeof tracks[variantLabel] === 'undefined') {\n const track = tech.addRemoteTextTrack({\n id: variantLabel,\n kind: 'subtitles',\n default: properties.default && properties.autoselect,\n language: properties.language,\n label: variantLabel\n }, false).track;\n tracks[variantLabel] = track;\n }\n }\n } // setup single error event handler for the segment loader\n\n segmentLoader.on('error', onError[type](type, settings));\n },\n /**\n * Setup TextTracks for the closed-caption groups\n *\n * @param {String} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @function initialize['CLOSED-CAPTIONS']\n */\n 'CLOSED-CAPTIONS': (type, settings) => {\n const {\n tech,\n main: {\n mediaGroups\n },\n mediaTypes: {\n [type]: {\n groups,\n tracks\n }\n }\n } = settings;\n for (const groupId in mediaGroups[type]) {\n if (!groups[groupId]) {\n groups[groupId] = [];\n }\n for (const variantLabel in mediaGroups[type][groupId]) {\n const properties = mediaGroups[type][groupId][variantLabel]; // Look for either 608 (CCn) or 708 (SERVICEn) caption services\n\n if (!/^(?:CC|SERVICE)/.test(properties.instreamId)) {\n continue;\n }\n const captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n let newProps = {\n label: variantLabel,\n language: properties.language,\n instreamId: properties.instreamId,\n default: properties.default && properties.autoselect\n };\n if (captionServices[newProps.instreamId]) {\n newProps = merge(newProps, captionServices[newProps.instreamId]);\n }\n if (newProps.default === undefined) {\n delete newProps.default;\n } // No PlaylistLoader is required for Closed-Captions because the captions are\n // embedded within the video stream\n\n groups[groupId].push(merge({\n id: variantLabel\n }, properties));\n if (typeof tracks[variantLabel] === 'undefined') {\n const track = tech.addRemoteTextTrack({\n id: newProps.instreamId,\n kind: 'captions',\n default: newProps.default,\n language: newProps.language,\n label: newProps.label\n }, false).track;\n tracks[variantLabel] = track;\n }\n }\n }\n }\n };\n const groupMatch = (list, media) => {\n for (let i = 0; i < list.length; i++) {\n if (playlistMatch(media, list[i])) {\n return true;\n }\n if (list[i].playlists && groupMatch(list[i].playlists, media)) {\n return true;\n }\n }\n return false;\n };\n /**\n * Returns a function used to get the active group of the provided type\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Function that returns the active media group for the provided type. Takes an\n * optional parameter {TextTrack} track. If no track is provided, a list of all\n * variants in the group, otherwise the variant corresponding to the provided\n * track is returned.\n * @function activeGroup\n */\n\n const activeGroup = (type, settings) => track => {\n const {\n mainPlaylistLoader,\n mediaTypes: {\n [type]: {\n groups\n }\n }\n } = settings;\n const media = mainPlaylistLoader.media();\n if (!media) {\n return null;\n }\n let variants = null; // set to variants to main media active group\n\n if (media.attributes[type]) {\n variants = groups[media.attributes[type]];\n }\n const groupKeys = Object.keys(groups);\n if (!variants) {\n // find the mainPlaylistLoader media\n // that is in a media group if we are dealing\n // with audio only\n if (type === 'AUDIO' && groupKeys.length > 1 && isAudioOnly(settings.main)) {\n for (let i = 0; i < groupKeys.length; i++) {\n const groupPropertyList = groups[groupKeys[i]];\n if (groupMatch(groupPropertyList, media)) {\n variants = groupPropertyList;\n break;\n }\n } // use the main group if it exists\n } else if (groups.main) {\n variants = groups.main; // only one group, use that one\n } else if (groupKeys.length === 1) {\n variants = groups[groupKeys[0]];\n }\n }\n if (typeof track === 'undefined') {\n return variants;\n }\n if (track === null || !variants) {\n // An active track was specified so a corresponding group is expected. track === null\n // means no track is currently active so there is no corresponding group\n return null;\n }\n return variants.filter(props => props.id === track.id)[0] || null;\n };\n const activeTrack = {\n /**\n * Returns a function used to get the active track of type provided\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Function that returns the active media track for the provided type. Returns\n * null if no track is active\n * @function activeTrack.AUDIO\n */\n AUDIO: (type, settings) => () => {\n const {\n mediaTypes: {\n [type]: {\n tracks\n }\n }\n } = settings;\n for (const id in tracks) {\n if (tracks[id].enabled) {\n return tracks[id];\n }\n }\n return null;\n },\n /**\n * Returns a function used to get the active track of type provided\n *\n * @param {string} type\n * MediaGroup type\n * @param {Object} settings\n * Object containing required information for media groups\n * @return {Function}\n * Function that returns the active media track for the provided type. Returns\n * null if no track is active\n * @function activeTrack.SUBTITLES\n */\n SUBTITLES: (type, settings) => () => {\n const {\n mediaTypes: {\n [type]: {\n tracks\n }\n }\n } = settings;\n for (const id in tracks) {\n if (tracks[id].mode === 'showing' || tracks[id].mode === 'hidden') {\n return tracks[id];\n }\n }\n return null;\n }\n };\n const getActiveGroup = (type, {\n mediaTypes\n }) => () => {\n const activeTrack_ = mediaTypes[type].activeTrack();\n if (!activeTrack_) {\n return null;\n }\n return mediaTypes[type].activeGroup(activeTrack_);\n };\n /**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the main manifest.\n *\n * @param {Object} settings\n * Object containing required information for setting up the media groups\n * @param {Tech} settings.tech\n * The tech of the player\n * @param {Object} settings.requestOptions\n * XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.mainPlaylistLoader\n * PlaylistLoader for the main source\n * @param {VhsHandler} settings.vhs\n * VHS SourceHandler\n * @param {Object} settings.main\n * The parsed main manifest\n * @param {Object} settings.mediaTypes\n * Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.excludePlaylist\n * Excludes the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\n\n const setupMediaGroups = settings => {\n ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(type => {\n initialize[type](type, settings);\n });\n const {\n mediaTypes,\n mainPlaylistLoader,\n tech,\n vhs,\n segmentLoaders: {\n ['AUDIO']: audioSegmentLoader,\n main: mainSegmentLoader\n }\n } = settings; // setup active group and track getters and change event handlers\n\n ['AUDIO', 'SUBTITLES'].forEach(type => {\n mediaTypes[type].activeGroup = activeGroup(type, settings);\n mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n mediaTypes[type].onGroupChanging = onGroupChanging(type, settings);\n mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n mediaTypes[type].getActiveGroup = getActiveGroup(type, settings);\n }); // DO NOT enable the default subtitle or caption track.\n // DO enable the default audio track\n\n const audioGroup = mediaTypes.AUDIO.activeGroup();\n if (audioGroup) {\n const groupId = (audioGroup.filter(group => group.default)[0] || audioGroup[0]).id;\n mediaTypes.AUDIO.tracks[groupId].enabled = true;\n mediaTypes.AUDIO.onGroupChanged();\n mediaTypes.AUDIO.onTrackChanged();\n const activeAudioGroup = mediaTypes.AUDIO.getActiveGroup(); // a similar check for handling setAudio on each loader is run again each time the\n // track is changed, but needs to be handled here since the track may not be considered\n // changed on the first call to onTrackChanged\n\n if (!activeAudioGroup.playlistLoader) {\n // either audio is muxed with video or the stream is audio only\n mainSegmentLoader.setAudio(true);\n } else {\n // audio is demuxed\n mainSegmentLoader.setAudio(false);\n audioSegmentLoader.setAudio(true);\n }\n }\n mainPlaylistLoader.on('mediachange', () => {\n ['AUDIO', 'SUBTITLES'].forEach(type => mediaTypes[type].onGroupChanged());\n });\n mainPlaylistLoader.on('mediachanging', () => {\n ['AUDIO', 'SUBTITLES'].forEach(type => mediaTypes[type].onGroupChanging());\n }); // custom audio track change event handler for usage event\n\n const onAudioTrackChanged = () => {\n mediaTypes.AUDIO.onTrackChanged();\n tech.trigger({\n type: 'usage',\n name: 'vhs-audio-change'\n });\n };\n tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n vhs.on('dispose', () => {\n tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n }); // clear existing audio tracks and add the ones we just created\n\n tech.clearTracks('audio');\n for (const id in mediaTypes.AUDIO.tracks) {\n tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n }\n };\n /**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n * Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\n\n const createMediaTypes = () => {\n const mediaTypes = {};\n ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(type => {\n mediaTypes[type] = {\n groups: {},\n tracks: {},\n activePlaylistLoader: null,\n activeGroup: noop,\n activeTrack: noop,\n getActiveGroup: noop,\n onGroupChanged: noop,\n onTrackChanged: noop,\n lastTrack_: null,\n logger_: logger(`MediaGroups[${type}]`)\n };\n });\n return mediaTypes;\n };\n\n /**\n * @file playlist-controller.js\n */\n const ABORT_EARLY_EXCLUSION_SECONDS = 60 * 2;\n let Vhs$1; // SegmentLoader stats that need to have each loader's\n // values summed to calculate the final value\n\n const loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred', 'mediaAppends'];\n const sumLoaderStat = function (stat) {\n return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n };\n const shouldSwitchToMedia = function ({\n currentPlaylist,\n buffered,\n currentTime,\n nextPlaylist,\n bufferLowWaterLine,\n bufferHighWaterLine,\n duration,\n bufferBasedABR,\n log\n }) {\n // we have no other playlist to switch to\n if (!nextPlaylist) {\n videojs.log.warn('We received no playlist to switch to. Please check your stream.');\n return false;\n }\n const sharedLogLine = `allowing switch ${currentPlaylist && currentPlaylist.id || 'null'} -> ${nextPlaylist.id}`;\n if (!currentPlaylist) {\n log(`${sharedLogLine} as current playlist is not set`);\n return true;\n } // no need to switch if playlist is the same\n\n if (nextPlaylist.id === currentPlaylist.id) {\n return false;\n } // determine if current time is in a buffered range.\n\n const isBuffered = Boolean(findRange(buffered, currentTime).length); // If the playlist is live, then we want to not take low water line into account.\n // This is because in LIVE, the player plays 3 segments from the end of the\n // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n // in those segments, a viewer will never experience a rendition upswitch.\n\n if (!currentPlaylist.endList) {\n // For LLHLS live streams, don't switch renditions before playback has started, as it almost\n // doubles the time to first playback.\n if (!isBuffered && typeof currentPlaylist.partTargetDuration === 'number') {\n log(`not ${sharedLogLine} as current playlist is live llhls, but currentTime isn't in buffered.`);\n return false;\n }\n log(`${sharedLogLine} as current playlist is live`);\n return true;\n }\n const forwardBuffer = timeAheadOf(buffered, currentTime);\n const maxBufferLowWaterLine = bufferBasedABR ? Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE : Config.MAX_BUFFER_LOW_WATER_LINE; // For the same reason as LIVE, we ignore the low water line when the VOD\n // duration is below the max potential low water line\n\n if (duration < maxBufferLowWaterLine) {\n log(`${sharedLogLine} as duration < max low water line (${duration} < ${maxBufferLowWaterLine})`);\n return true;\n }\n const nextBandwidth = nextPlaylist.attributes.BANDWIDTH;\n const currBandwidth = currentPlaylist.attributes.BANDWIDTH; // when switching down, if our buffer is lower than the high water line,\n // we can switch down\n\n if (nextBandwidth < currBandwidth && (!bufferBasedABR || forwardBuffer < bufferHighWaterLine)) {\n let logLine = `${sharedLogLine} as next bandwidth < current bandwidth (${nextBandwidth} < ${currBandwidth})`;\n if (bufferBasedABR) {\n logLine += ` and forwardBuffer < bufferHighWaterLine (${forwardBuffer} < ${bufferHighWaterLine})`;\n }\n log(logLine);\n return true;\n } // and if our buffer is higher than the low water line,\n // we can switch up\n\n if ((!bufferBasedABR || nextBandwidth > currBandwidth) && forwardBuffer >= bufferLowWaterLine) {\n let logLine = `${sharedLogLine} as forwardBuffer >= bufferLowWaterLine (${forwardBuffer} >= ${bufferLowWaterLine})`;\n if (bufferBasedABR) {\n logLine += ` and next bandwidth > current bandwidth (${nextBandwidth} > ${currBandwidth})`;\n }\n log(logLine);\n return true;\n }\n log(`not ${sharedLogLine} as no switching criteria met`);\n return false;\n };\n /**\n * the main playlist controller controller all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a main playlist and a series of audio playlists\n * if they are available\n *\n * @class PlaylistController\n * @extends videojs.EventTarget\n */\n\n class PlaylistController extends videojs.EventTarget {\n constructor(options) {\n super();\n const {\n src,\n withCredentials,\n tech,\n bandwidth,\n externVhs,\n useCueTags,\n playlistExclusionDuration,\n enableLowInitialPlaylist,\n sourceType,\n cacheEncryptionKeys,\n bufferBasedABR,\n leastPixelDiffSelector,\n captionServices\n } = options;\n if (!src) {\n throw new Error('A non-empty playlist URL or JSON manifest string is required');\n }\n let {\n maxPlaylistRetries\n } = options;\n if (maxPlaylistRetries === null || typeof maxPlaylistRetries === 'undefined') {\n maxPlaylistRetries = Infinity;\n }\n Vhs$1 = externVhs;\n this.bufferBasedABR = Boolean(bufferBasedABR);\n this.leastPixelDiffSelector = Boolean(leastPixelDiffSelector);\n this.withCredentials = withCredentials;\n this.tech_ = tech;\n this.vhs_ = tech.vhs;\n this.sourceType_ = sourceType;\n this.useCueTags_ = useCueTags;\n this.playlistExclusionDuration = playlistExclusionDuration;\n this.maxPlaylistRetries = maxPlaylistRetries;\n this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n if (this.useCueTags_) {\n this.cueTagsTrack_ = this.tech_.addTextTrack('metadata', 'ad-cues');\n this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n }\n this.requestOptions_ = {\n withCredentials,\n maxPlaylistRetries,\n timeout: null\n };\n this.on('error', this.pauseLoading);\n this.mediaTypes_ = createMediaTypes();\n this.mediaSource = new window.MediaSource();\n this.handleDurationChange_ = this.handleDurationChange_.bind(this);\n this.handleSourceOpen_ = this.handleSourceOpen_.bind(this);\n this.handleSourceEnded_ = this.handleSourceEnded_.bind(this);\n this.mediaSource.addEventListener('durationchange', this.handleDurationChange_); // load the media source into the player\n\n this.mediaSource.addEventListener('sourceopen', this.handleSourceOpen_);\n this.mediaSource.addEventListener('sourceended', this.handleSourceEnded_); // we don't have to handle sourceclose since dispose will handle termination of\n // everything, and the MediaSource should not be detached without a proper disposal\n\n this.seekable_ = createTimeRanges();\n this.hasPlayed_ = false;\n this.syncController_ = new SyncController(options);\n this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n kind: 'metadata',\n label: 'segment-metadata'\n }, false).track;\n this.decrypter_ = new Decrypter();\n this.sourceUpdater_ = new SourceUpdater(this.mediaSource);\n this.inbandTextTracks_ = {};\n this.timelineChangeController_ = new TimelineChangeController();\n const segmentLoaderSettings = {\n vhs: this.vhs_,\n parse708captions: options.parse708captions,\n useDtsForTimestampOffset: options.useDtsForTimestampOffset,\n captionServices,\n mediaSource: this.mediaSource,\n currentTime: this.tech_.currentTime.bind(this.tech_),\n seekable: () => this.seekable(),\n seeking: () => this.tech_.seeking(),\n duration: () => this.duration(),\n hasPlayed: () => this.hasPlayed_,\n goalBufferLength: () => this.goalBufferLength(),\n bandwidth,\n syncController: this.syncController_,\n decrypter: this.decrypter_,\n sourceType: this.sourceType_,\n inbandTextTracks: this.inbandTextTracks_,\n cacheEncryptionKeys,\n sourceUpdater: this.sourceUpdater_,\n timelineChangeController: this.timelineChangeController_,\n exactManifestTimings: options.exactManifestTimings\n }; // The source type check not only determines whether a special DASH playlist loader\n // should be used, but also covers the case where the provided src is a vhs-json\n // manifest object (instead of a URL). In the case of vhs-json, the default\n // PlaylistLoader should be used.\n\n this.mainPlaylistLoader_ = this.sourceType_ === 'dash' ? new DashPlaylistLoader(src, this.vhs_, this.requestOptions_) : new PlaylistLoader(src, this.vhs_, this.requestOptions_);\n this.setupMainPlaylistLoaderListeners_(); // setup segment loaders\n // combined audio/video or just video when alternate audio track is selected\n\n this.mainSegmentLoader_ = new SegmentLoader(merge(segmentLoaderSettings, {\n segmentMetadataTrack: this.segmentMetadataTrack_,\n loaderType: 'main'\n }), options); // alternate audio track\n\n this.audioSegmentLoader_ = new SegmentLoader(merge(segmentLoaderSettings, {\n loaderType: 'audio'\n }), options);\n this.subtitleSegmentLoader_ = new VTTSegmentLoader(merge(segmentLoaderSettings, {\n loaderType: 'vtt',\n featuresNativeTextTracks: this.tech_.featuresNativeTextTracks,\n loadVttJs: () => new Promise((resolve, reject) => {\n function onLoad() {\n tech.off('vttjserror', onError);\n resolve();\n }\n function onError() {\n tech.off('vttjsloaded', onLoad);\n reject();\n }\n tech.one('vttjsloaded', onLoad);\n tech.one('vttjserror', onError); // safe to call multiple times, script will be loaded only once:\n\n tech.addWebVttScript_();\n })\n }), options);\n this.setupSegmentLoaderListeners_();\n if (this.bufferBasedABR) {\n this.mainPlaylistLoader_.one('loadedplaylist', () => this.startABRTimer_());\n this.tech_.on('pause', () => this.stopABRTimer_());\n this.tech_.on('play', () => this.startABRTimer_());\n } // Create SegmentLoader stat-getters\n // mediaRequests_\n // mediaRequestsAborted_\n // mediaRequestsTimedout_\n // mediaRequestsErrored_\n // mediaTransferDuration_\n // mediaBytesTransferred_\n // mediaAppends_\n\n loaderStats.forEach(stat => {\n this[stat + '_'] = sumLoaderStat.bind(this, stat);\n });\n this.logger_ = logger('pc');\n this.triggeredFmp4Usage = false;\n if (this.tech_.preload() === 'none') {\n this.loadOnPlay_ = () => {\n this.loadOnPlay_ = null;\n this.mainPlaylistLoader_.load();\n };\n this.tech_.one('play', this.loadOnPlay_);\n } else {\n this.mainPlaylistLoader_.load();\n }\n this.timeToLoadedData__ = -1;\n this.mainAppendsToLoadedData__ = -1;\n this.audioAppendsToLoadedData__ = -1;\n const event = this.tech_.preload() === 'none' ? 'play' : 'loadstart'; // start the first frame timer on loadstart or play (for preload none)\n\n this.tech_.one(event, () => {\n const timeToLoadedDataStart = Date.now();\n this.tech_.one('loadeddata', () => {\n this.timeToLoadedData__ = Date.now() - timeToLoadedDataStart;\n this.mainAppendsToLoadedData__ = this.mainSegmentLoader_.mediaAppends;\n this.audioAppendsToLoadedData__ = this.audioSegmentLoader_.mediaAppends;\n });\n });\n }\n mainAppendsToLoadedData_() {\n return this.mainAppendsToLoadedData__;\n }\n audioAppendsToLoadedData_() {\n return this.audioAppendsToLoadedData__;\n }\n appendsToLoadedData_() {\n const main = this.mainAppendsToLoadedData_();\n const audio = this.audioAppendsToLoadedData_();\n if (main === -1 || audio === -1) {\n return -1;\n }\n return main + audio;\n }\n timeToLoadedData_() {\n return this.timeToLoadedData__;\n }\n /**\n * Run selectPlaylist and switch to the new playlist if we should\n *\n * @param {string} [reason=abr] a reason for why the ABR check is made\n * @private\n */\n\n checkABR_(reason = 'abr') {\n const nextPlaylist = this.selectPlaylist();\n if (nextPlaylist && this.shouldSwitchToMedia_(nextPlaylist)) {\n this.switchMedia_(nextPlaylist, reason);\n }\n }\n switchMedia_(playlist, cause, delay) {\n const oldMedia = this.media();\n const oldId = oldMedia && (oldMedia.id || oldMedia.uri);\n const newId = playlist.id || playlist.uri;\n if (oldId && oldId !== newId) {\n this.logger_(`switch media ${oldId} -> ${newId} from ${cause}`);\n this.tech_.trigger({\n type: 'usage',\n name: `vhs-rendition-change-${cause}`\n });\n }\n this.mainPlaylistLoader_.media(playlist, delay);\n }\n /**\n * Start a timer that periodically calls checkABR_\n *\n * @private\n */\n\n startABRTimer_() {\n this.stopABRTimer_();\n this.abrTimer_ = window.setInterval(() => this.checkABR_(), 250);\n }\n /**\n * Stop the timer that periodically calls checkABR_\n *\n * @private\n */\n\n stopABRTimer_() {\n // if we're scrubbing, we don't need to pause.\n // This getter will be added to Video.js in version 7.11.\n if (this.tech_.scrubbing && this.tech_.scrubbing()) {\n return;\n }\n window.clearInterval(this.abrTimer_);\n this.abrTimer_ = null;\n }\n /**\n * Get a list of playlists for the currently selected audio playlist\n *\n * @return {Array} the array of audio playlists\n */\n\n getAudioTrackPlaylists_() {\n const main = this.main();\n const defaultPlaylists = main && main.playlists || []; // if we don't have any audio groups then we can only\n // assume that the audio tracks are contained in main\n // playlist array, use that or an empty array.\n\n if (!main || !main.mediaGroups || !main.mediaGroups.AUDIO) {\n return defaultPlaylists;\n }\n const AUDIO = main.mediaGroups.AUDIO;\n const groupKeys = Object.keys(AUDIO);\n let track; // get the current active track\n\n if (Object.keys(this.mediaTypes_.AUDIO.groups).length) {\n track = this.mediaTypes_.AUDIO.activeTrack(); // or get the default track from main if mediaTypes_ isn't setup yet\n } else {\n // default group is `main` or just the first group.\n const defaultGroup = AUDIO.main || groupKeys.length && AUDIO[groupKeys[0]];\n for (const label in defaultGroup) {\n if (defaultGroup[label].default) {\n track = {\n label\n };\n break;\n }\n }\n } // no active track no playlists.\n\n if (!track) {\n return defaultPlaylists;\n }\n const playlists = []; // get all of the playlists that are possible for the\n // active track.\n\n for (const group in AUDIO) {\n if (AUDIO[group][track.label]) {\n const properties = AUDIO[group][track.label];\n if (properties.playlists && properties.playlists.length) {\n playlists.push.apply(playlists, properties.playlists);\n } else if (properties.uri) {\n playlists.push(properties);\n } else if (main.playlists.length) {\n // if an audio group does not have a uri\n // see if we have main playlists that use it as a group.\n // if we do then add those to the playlists list.\n for (let i = 0; i < main.playlists.length; i++) {\n const playlist = main.playlists[i];\n if (playlist.attributes && playlist.attributes.AUDIO && playlist.attributes.AUDIO === group) {\n playlists.push(playlist);\n }\n }\n }\n }\n }\n if (!playlists.length) {\n return defaultPlaylists;\n }\n return playlists;\n }\n /**\n * Register event handlers on the main playlist loader. A helper\n * function for construction time.\n *\n * @private\n */\n\n setupMainPlaylistLoaderListeners_() {\n this.mainPlaylistLoader_.on('loadedmetadata', () => {\n const media = this.mainPlaylistLoader_.media();\n const requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n // timeout the request.\n\n if (isLowestEnabledRendition(this.mainPlaylistLoader_.main, this.mainPlaylistLoader_.media())) {\n this.requestOptions_.timeout = 0;\n } else {\n this.requestOptions_.timeout = requestTimeout;\n } // if this isn't a live video and preload permits, start\n // downloading segments\n\n if (media.endList && this.tech_.preload() !== 'none') {\n this.mainSegmentLoader_.playlist(media, this.requestOptions_);\n this.mainSegmentLoader_.load();\n }\n setupMediaGroups({\n sourceType: this.sourceType_,\n segmentLoaders: {\n AUDIO: this.audioSegmentLoader_,\n SUBTITLES: this.subtitleSegmentLoader_,\n main: this.mainSegmentLoader_\n },\n tech: this.tech_,\n requestOptions: this.requestOptions_,\n mainPlaylistLoader: this.mainPlaylistLoader_,\n vhs: this.vhs_,\n main: this.main(),\n mediaTypes: this.mediaTypes_,\n excludePlaylist: this.excludePlaylist.bind(this)\n });\n this.triggerPresenceUsage_(this.main(), media);\n this.setupFirstPlay();\n if (!this.mediaTypes_.AUDIO.activePlaylistLoader || this.mediaTypes_.AUDIO.activePlaylistLoader.media()) {\n this.trigger('selectedinitialmedia');\n } else {\n // We must wait for the active audio playlist loader to\n // finish setting up before triggering this event so the\n // representations API and EME setup is correct\n this.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', () => {\n this.trigger('selectedinitialmedia');\n });\n }\n });\n this.mainPlaylistLoader_.on('loadedplaylist', () => {\n if (this.loadOnPlay_) {\n this.tech_.off('play', this.loadOnPlay_);\n }\n let updatedPlaylist = this.mainPlaylistLoader_.media();\n if (!updatedPlaylist) {\n // exclude any variants that are not supported by the browser before selecting\n // an initial media as the playlist selectors do not consider browser support\n this.excludeUnsupportedVariants_();\n let selectedMedia;\n if (this.enableLowInitialPlaylist) {\n selectedMedia = this.selectInitialPlaylist();\n }\n if (!selectedMedia) {\n selectedMedia = this.selectPlaylist();\n }\n if (!selectedMedia || !this.shouldSwitchToMedia_(selectedMedia)) {\n return;\n }\n this.initialMedia_ = selectedMedia;\n this.switchMedia_(this.initialMedia_, 'initial'); // Under the standard case where a source URL is provided, loadedplaylist will\n // fire again since the playlist will be requested. In the case of vhs-json\n // (where the manifest object is provided as the source), when the media\n // playlist's `segments` list is already available, a media playlist won't be\n // requested, and loadedplaylist won't fire again, so the playlist handler must be\n // called on its own here.\n\n const haveJsonSource = this.sourceType_ === 'vhs-json' && this.initialMedia_.segments;\n if (!haveJsonSource) {\n return;\n }\n updatedPlaylist = this.initialMedia_;\n }\n this.handleUpdatedMediaPlaylist(updatedPlaylist);\n });\n this.mainPlaylistLoader_.on('error', () => {\n const error = this.mainPlaylistLoader_.error;\n this.excludePlaylist({\n playlistToExclude: error.playlist,\n error\n });\n });\n this.mainPlaylistLoader_.on('mediachanging', () => {\n this.mainSegmentLoader_.abort();\n this.mainSegmentLoader_.pause();\n });\n this.mainPlaylistLoader_.on('mediachange', () => {\n const media = this.mainPlaylistLoader_.media();\n const requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n // timeout the request.\n\n if (isLowestEnabledRendition(this.mainPlaylistLoader_.main, this.mainPlaylistLoader_.media())) {\n this.requestOptions_.timeout = 0;\n } else {\n this.requestOptions_.timeout = requestTimeout;\n }\n this.mainPlaylistLoader_.load(); // TODO: Create a new event on the PlaylistLoader that signals\n // that the segments have changed in some way and use that to\n // update the SegmentLoader instead of doing it twice here and\n // on `loadedplaylist`\n\n this.mainSegmentLoader_.playlist(media, this.requestOptions_);\n this.mainSegmentLoader_.load();\n this.tech_.trigger({\n type: 'mediachange',\n bubbles: true\n });\n });\n this.mainPlaylistLoader_.on('playlistunchanged', () => {\n const updatedPlaylist = this.mainPlaylistLoader_.media(); // ignore unchanged playlists that have already been\n // excluded for not-changing. We likely just have a really slowly updating\n // playlist.\n\n if (updatedPlaylist.lastExcludeReason_ === 'playlist-unchanged') {\n return;\n }\n const playlistOutdated = this.stuckAtPlaylistEnd_(updatedPlaylist);\n if (playlistOutdated) {\n // Playlist has stopped updating and we're stuck at its end. Try to\n // exclude it and switch to another playlist in the hope that that\n // one is updating (and give the player a chance to re-adjust to the\n // safe live point).\n this.excludePlaylist({\n error: {\n message: 'Playlist no longer updating.',\n reason: 'playlist-unchanged'\n }\n }); // useful for monitoring QoS\n\n this.tech_.trigger('playliststuck');\n }\n });\n this.mainPlaylistLoader_.on('renditiondisabled', () => {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-rendition-disabled'\n });\n });\n this.mainPlaylistLoader_.on('renditionenabled', () => {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-rendition-enabled'\n });\n });\n }\n /**\n * Given an updated media playlist (whether it was loaded for the first time, or\n * refreshed for live playlists), update any relevant properties and state to reflect\n * changes in the media that should be accounted for (e.g., cues and duration).\n *\n * @param {Object} updatedPlaylist the updated media playlist object\n *\n * @private\n */\n\n handleUpdatedMediaPlaylist(updatedPlaylist) {\n if (this.useCueTags_) {\n this.updateAdCues_(updatedPlaylist);\n } // TODO: Create a new event on the PlaylistLoader that signals\n // that the segments have changed in some way and use that to\n // update the SegmentLoader instead of doing it twice here and\n // on `mediachange`\n\n this.mainSegmentLoader_.playlist(updatedPlaylist, this.requestOptions_);\n this.updateDuration(!updatedPlaylist.endList); // If the player isn't paused, ensure that the segment loader is running,\n // as it is possible that it was temporarily stopped while waiting for\n // a playlist (e.g., in case the playlist errored and we re-requested it).\n\n if (!this.tech_.paused()) {\n this.mainSegmentLoader_.load();\n if (this.audioSegmentLoader_) {\n this.audioSegmentLoader_.load();\n }\n }\n }\n /**\n * A helper function for triggerring presence usage events once per source\n *\n * @private\n */\n\n triggerPresenceUsage_(main, media) {\n const mediaGroups = main.mediaGroups || {};\n let defaultDemuxed = true;\n const audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n for (const mediaGroup in mediaGroups.AUDIO) {\n for (const label in mediaGroups.AUDIO[mediaGroup]) {\n const properties = mediaGroups.AUDIO[mediaGroup][label];\n if (!properties.uri) {\n defaultDemuxed = false;\n }\n }\n }\n if (defaultDemuxed) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-demuxed'\n });\n }\n if (Object.keys(mediaGroups.SUBTITLES).length) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-webvtt'\n });\n }\n if (Vhs$1.Playlist.isAes(media)) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-aes'\n });\n }\n if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-alternate-audio'\n });\n }\n if (this.useCueTags_) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-playlist-cue-tags'\n });\n }\n }\n shouldSwitchToMedia_(nextPlaylist) {\n const currentPlaylist = this.mainPlaylistLoader_.media() || this.mainPlaylistLoader_.pendingMedia_;\n const currentTime = this.tech_.currentTime();\n const bufferLowWaterLine = this.bufferLowWaterLine();\n const bufferHighWaterLine = this.bufferHighWaterLine();\n const buffered = this.tech_.buffered();\n return shouldSwitchToMedia({\n buffered,\n currentTime,\n currentPlaylist,\n nextPlaylist,\n bufferLowWaterLine,\n bufferHighWaterLine,\n duration: this.duration(),\n bufferBasedABR: this.bufferBasedABR,\n log: this.logger_\n });\n }\n /**\n * Register event handlers on the segment loaders. A helper function\n * for construction time.\n *\n * @private\n */\n\n setupSegmentLoaderListeners_() {\n this.mainSegmentLoader_.on('bandwidthupdate', () => {\n // Whether or not buffer based ABR or another ABR is used, on a bandwidth change it's\n // useful to check to see if a rendition switch should be made.\n this.checkABR_('bandwidthupdate');\n this.tech_.trigger('bandwidthupdate');\n });\n this.mainSegmentLoader_.on('timeout', () => {\n if (this.bufferBasedABR) {\n // If a rendition change is needed, then it would've be done on `bandwidthupdate`.\n // Here the only consideration is that for buffer based ABR there's no guarantee\n // of an immediate switch (since the bandwidth is averaged with a timeout\n // bandwidth value of 1), so force a load on the segment loader to keep it going.\n this.mainSegmentLoader_.load();\n }\n }); // `progress` events are not reliable enough of a bandwidth measure to trigger buffer\n // based ABR.\n\n if (!this.bufferBasedABR) {\n this.mainSegmentLoader_.on('progress', () => {\n this.trigger('progress');\n });\n }\n this.mainSegmentLoader_.on('error', () => {\n const error = this.mainSegmentLoader_.error();\n this.excludePlaylist({\n playlistToExclude: error.playlist,\n error\n });\n });\n this.mainSegmentLoader_.on('appenderror', () => {\n this.error = this.mainSegmentLoader_.error_;\n this.trigger('error');\n });\n this.mainSegmentLoader_.on('syncinfoupdate', () => {\n this.onSyncInfoUpdate_();\n });\n this.mainSegmentLoader_.on('timestampoffset', () => {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-timestamp-offset'\n });\n });\n this.audioSegmentLoader_.on('syncinfoupdate', () => {\n this.onSyncInfoUpdate_();\n });\n this.audioSegmentLoader_.on('appenderror', () => {\n this.error = this.audioSegmentLoader_.error_;\n this.trigger('error');\n });\n this.mainSegmentLoader_.on('ended', () => {\n this.logger_('main segment loader ended');\n this.onEndOfStream();\n });\n this.mainSegmentLoader_.on('earlyabort', event => {\n // never try to early abort with the new ABR algorithm\n if (this.bufferBasedABR) {\n return;\n }\n this.delegateLoaders_('all', ['abort']);\n this.excludePlaylist({\n error: {\n message: 'Aborted early because there isn\\'t enough bandwidth to complete ' + 'the request without rebuffering.'\n },\n playlistExclusionDuration: ABORT_EARLY_EXCLUSION_SECONDS\n });\n });\n const updateCodecs = () => {\n if (!this.sourceUpdater_.hasCreatedSourceBuffers()) {\n return this.tryToCreateSourceBuffers_();\n }\n const codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n if (!codecs) {\n return;\n }\n this.sourceUpdater_.addOrChangeSourceBuffers(codecs);\n };\n this.mainSegmentLoader_.on('trackinfo', updateCodecs);\n this.audioSegmentLoader_.on('trackinfo', updateCodecs);\n this.mainSegmentLoader_.on('fmp4', () => {\n if (!this.triggeredFmp4Usage) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-fmp4'\n });\n this.triggeredFmp4Usage = true;\n }\n });\n this.audioSegmentLoader_.on('fmp4', () => {\n if (!this.triggeredFmp4Usage) {\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-fmp4'\n });\n this.triggeredFmp4Usage = true;\n }\n });\n this.audioSegmentLoader_.on('ended', () => {\n this.logger_('audioSegmentLoader ended');\n this.onEndOfStream();\n });\n }\n mediaSecondsLoaded_() {\n return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n }\n /**\n * Call load on our SegmentLoaders\n */\n\n load() {\n this.mainSegmentLoader_.load();\n if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n this.audioSegmentLoader_.load();\n }\n if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n this.subtitleSegmentLoader_.load();\n }\n }\n /**\n * Re-tune playback quality level for the current player\n * conditions. This method will perform destructive actions like removing\n * already buffered content in order to readjust the currently active\n * playlist quickly. This is good for manual quality changes\n *\n * @private\n */\n\n fastQualityChange_(media = this.selectPlaylist()) {\n if (media === this.mainPlaylistLoader_.media()) {\n this.logger_('skipping fastQualityChange because new media is same as old');\n return;\n }\n this.switchMedia_(media, 'fast-quality'); // Delete all buffered data to allow an immediate quality switch, then seek to give\n // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds\n // ahead is roughly the minimum that will accomplish this across a variety of content\n // in IE and Edge, but seeking in place is sufficient on all other browsers)\n // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/\n // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904\n\n this.mainSegmentLoader_.resetEverything(() => {\n // Since this is not a typical seek, we avoid the seekTo method which can cause segments\n // from the previously enabled rendition to load before the new playlist has finished loading\n if (videojs.browser.IE_VERSION || videojs.browser.IS_EDGE) {\n this.tech_.setCurrentTime(this.tech_.currentTime() + 0.04);\n } else {\n this.tech_.setCurrentTime(this.tech_.currentTime());\n }\n }); // don't need to reset audio as it is reset when media changes\n }\n /**\n * Begin playback.\n */\n\n play() {\n if (this.setupFirstPlay()) {\n return;\n }\n if (this.tech_.ended()) {\n this.tech_.setCurrentTime(0);\n }\n if (this.hasPlayed_) {\n this.load();\n }\n const seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,\n // seek forward to the live point\n\n if (this.tech_.duration() === Infinity) {\n if (this.tech_.currentTime() < seekable.start(0)) {\n return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));\n }\n }\n }\n /**\n * Seek to the latest media position if this is a live video and the\n * player and video are loaded and initialized.\n */\n\n setupFirstPlay() {\n const media = this.mainPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play\n // If 1) there is no active media\n // 2) the player is paused\n // 3) the first play has already been setup\n // then exit early\n\n if (!media || this.tech_.paused() || this.hasPlayed_) {\n return false;\n } // when the video is a live stream\n\n if (!media.endList) {\n const seekable = this.seekable();\n if (!seekable.length) {\n // without a seekable range, the player cannot seek to begin buffering at the live\n // point\n return false;\n }\n if (videojs.browser.IE_VERSION && this.tech_.readyState() === 0) {\n // IE11 throws an InvalidStateError if you try to set currentTime while the\n // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n this.tech_.one('loadedmetadata', () => {\n this.trigger('firstplay');\n this.tech_.setCurrentTime(seekable.end(0));\n this.hasPlayed_ = true;\n });\n return false;\n } // trigger firstplay to inform the source handler to ignore the next seek event\n\n this.trigger('firstplay'); // seek to the live point\n\n this.tech_.setCurrentTime(seekable.end(0));\n }\n this.hasPlayed_ = true; // we can begin loading now that everything is ready\n\n this.load();\n return true;\n }\n /**\n * handle the sourceopen event on the MediaSource\n *\n * @private\n */\n\n handleSourceOpen_() {\n // Only attempt to create the source buffer if none already exist.\n // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n // after `endOfStream` has been called (in response to a seek for instance)\n this.tryToCreateSourceBuffers_(); // if autoplay is enabled, begin playback. This is duplicative of\n // code in video.js but is required because play() must be invoked\n // *after* the media source has opened.\n\n if (this.tech_.autoplay()) {\n const playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request\n // on browsers which return a promise\n\n if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n playPromise.then(null, e => {});\n }\n }\n this.trigger('sourceopen');\n }\n /**\n * handle the sourceended event on the MediaSource\n *\n * @private\n */\n\n handleSourceEnded_() {\n if (!this.inbandTextTracks_.metadataTrack_) {\n return;\n }\n const cues = this.inbandTextTracks_.metadataTrack_.cues;\n if (!cues || !cues.length) {\n return;\n }\n const duration = this.duration();\n cues[cues.length - 1].endTime = isNaN(duration) || Math.abs(duration) === Infinity ? Number.MAX_VALUE : duration;\n }\n /**\n * handle the durationchange event on the MediaSource\n *\n * @private\n */\n\n handleDurationChange_() {\n this.tech_.trigger('durationchange');\n }\n /**\n * Calls endOfStream on the media source when all active stream types have called\n * endOfStream\n *\n * @param {string} streamType\n * Stream type of the segment loader that called endOfStream\n * @private\n */\n\n onEndOfStream() {\n let isEndOfStream = this.mainSegmentLoader_.ended_;\n if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n const mainMediaInfo = this.mainSegmentLoader_.getCurrentMediaInfo_(); // if the audio playlist loader exists, then alternate audio is active\n\n if (!mainMediaInfo || mainMediaInfo.hasVideo) {\n // if we do not know if the main segment loader contains video yet or if we\n // definitively know the main segment loader contains video, then we need to wait\n // for both main and audio segment loaders to call endOfStream\n isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n } else {\n // otherwise just rely on the audio loader\n isEndOfStream = this.audioSegmentLoader_.ended_;\n }\n }\n if (!isEndOfStream) {\n return;\n }\n this.stopABRTimer_();\n this.sourceUpdater_.endOfStream();\n }\n /**\n * Check if a playlist has stopped being updated\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist has stopped being updated or not\n */\n\n stuckAtPlaylistEnd_(playlist) {\n const seekable = this.seekable();\n if (!seekable.length) {\n // playlist doesn't have enough information to determine whether we are stuck\n return false;\n }\n const expired = this.syncController_.getExpiredTime(playlist, this.duration());\n if (expired === null) {\n return false;\n } // does not use the safe live end to calculate playlist end, since we\n // don't want to say we are stuck while there is still content\n\n const absolutePlaylistEnd = Vhs$1.Playlist.playlistEnd(playlist, expired);\n const currentTime = this.tech_.currentTime();\n const buffered = this.tech_.buffered();\n if (!buffered.length) {\n // return true if the playhead reached the absolute end of the playlist\n return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;\n }\n const bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute\n // end of playlist\n\n return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;\n }\n /**\n * Exclude a playlist for a set amount of time, making it unavailable for selection by\n * the rendition selection algorithm, then force a new playlist (rendition) selection.\n *\n * @param {Object=} playlistToExclude\n * the playlist to exclude, defaults to the currently selected playlist\n * @param {Object=} error\n * an optional error\n * @param {number=} playlistExclusionDuration\n * an optional number of seconds to exclude the playlist\n */\n\n excludePlaylist({\n playlistToExclude = this.mainPlaylistLoader_.media(),\n error = {},\n playlistExclusionDuration\n }) {\n // If the `error` was generated by the playlist loader, it will contain\n // the playlist we were trying to load (but failed) and that should be\n // excluded instead of the currently selected playlist which is likely\n // out-of-date in this scenario\n playlistToExclude = playlistToExclude || this.mainPlaylistLoader_.media();\n playlistExclusionDuration = playlistExclusionDuration || error.playlistExclusionDuration || this.playlistExclusionDuration; // If there is no current playlist, then an error occurred while we were\n // trying to load the main OR while we were disposing of the tech\n\n if (!playlistToExclude) {\n this.error = error;\n if (this.mediaSource.readyState !== 'open') {\n this.trigger('error');\n } else {\n this.sourceUpdater_.endOfStream('network');\n }\n return;\n }\n playlistToExclude.playlistErrors_++;\n const playlists = this.mainPlaylistLoader_.main.playlists;\n const enabledPlaylists = playlists.filter(isEnabled);\n const isFinalRendition = enabledPlaylists.length === 1 && enabledPlaylists[0] === playlistToExclude; // Don't exclude the only playlist unless it was excluded\n // forever\n\n if (playlists.length === 1 && playlistExclusionDuration !== Infinity) {\n videojs.log.warn(`Problem encountered with playlist ${playlistToExclude.id}. ` + 'Trying again since it is the only playlist.');\n this.tech_.trigger('retryplaylist'); // if this is a final rendition, we should delay\n\n return this.mainPlaylistLoader_.load(isFinalRendition);\n }\n if (isFinalRendition) {\n // Since we're on the final non-excluded playlist, and we're about to exclude\n // it, instead of erring the player or retrying this playlist, clear out the current\n // exclusion list. This allows other playlists to be attempted in case any have been\n // fixed.\n let reincluded = false;\n playlists.forEach(playlist => {\n // skip current playlist which is about to be excluded\n if (playlist === playlistToExclude) {\n return;\n }\n const excludeUntil = playlist.excludeUntil; // a playlist cannot be reincluded if it wasn't excluded to begin with.\n\n if (typeof excludeUntil !== 'undefined' && excludeUntil !== Infinity) {\n reincluded = true;\n delete playlist.excludeUntil;\n }\n });\n if (reincluded) {\n videojs.log.warn('Removing other playlists from the exclusion list because the last ' + 'rendition is about to be excluded.'); // Technically we are retrying a playlist, in that we are simply retrying a previous\n // playlist. This is needed for users relying on the retryplaylist event to catch a\n // case where the player might be stuck and looping through \"dead\" playlists.\n\n this.tech_.trigger('retryplaylist');\n }\n } // Exclude this playlist\n\n let excludeUntil;\n if (playlistToExclude.playlistErrors_ > this.maxPlaylistRetries) {\n excludeUntil = Infinity;\n } else {\n excludeUntil = Date.now() + playlistExclusionDuration * 1000;\n }\n playlistToExclude.excludeUntil = excludeUntil;\n if (error.reason) {\n playlistToExclude.lastExcludeReason_ = error.reason;\n }\n this.tech_.trigger('excludeplaylist');\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-rendition-excluded'\n }); // TODO: only load a new playlist if we're excluding the current playlist\n // If this function was called with a playlist that's not the current active playlist\n // (e.g., media().id !== playlistToExclude.id),\n // then a new playlist should not be selected and loaded, as there's nothing wrong with the current playlist.\n\n const nextPlaylist = this.selectPlaylist();\n if (!nextPlaylist) {\n this.error = 'Playback cannot continue. No available working or supported playlists.';\n this.trigger('error');\n return;\n }\n const logFn = error.internal ? this.logger_ : videojs.log.warn;\n const errorMessage = error.message ? ' ' + error.message : '';\n logFn(`${error.internal ? 'Internal problem' : 'Problem'} encountered with playlist ${playlistToExclude.id}.` + `${errorMessage} Switching to playlist ${nextPlaylist.id}.`); // if audio group changed reset audio loaders\n\n if (nextPlaylist.attributes.AUDIO !== playlistToExclude.attributes.AUDIO) {\n this.delegateLoaders_('audio', ['abort', 'pause']);\n } // if subtitle group changed reset subtitle loaders\n\n if (nextPlaylist.attributes.SUBTITLES !== playlistToExclude.attributes.SUBTITLES) {\n this.delegateLoaders_('subtitle', ['abort', 'pause']);\n }\n this.delegateLoaders_('main', ['abort', 'pause']);\n const delayDuration = nextPlaylist.targetDuration / 2 * 1000 || 5 * 1000;\n const shouldDelay = typeof nextPlaylist.lastRequest === 'number' && Date.now() - nextPlaylist.lastRequest <= delayDuration; // delay if it's a final rendition or if the last refresh is sooner than half targetDuration\n\n return this.switchMedia_(nextPlaylist, 'exclude', isFinalRendition || shouldDelay);\n }\n /**\n * Pause all segment/playlist loaders\n */\n\n pauseLoading() {\n this.delegateLoaders_('all', ['abort', 'pause']);\n this.stopABRTimer_();\n }\n /**\n * Call a set of functions in order on playlist loaders, segment loaders,\n * or both types of loaders.\n *\n * @param {string} filter\n * Filter loaders that should call fnNames using a string. Can be:\n * * all - run on all loaders\n * * audio - run on all audio loaders\n * * subtitle - run on all subtitle loaders\n * * main - run on the main loaders\n *\n * @param {Array|string} fnNames\n * A string or array of function names to call.\n */\n\n delegateLoaders_(filter, fnNames) {\n const loaders = [];\n const dontFilterPlaylist = filter === 'all';\n if (dontFilterPlaylist || filter === 'main') {\n loaders.push(this.mainPlaylistLoader_);\n }\n const mediaTypes = [];\n if (dontFilterPlaylist || filter === 'audio') {\n mediaTypes.push('AUDIO');\n }\n if (dontFilterPlaylist || filter === 'subtitle') {\n mediaTypes.push('CLOSED-CAPTIONS');\n mediaTypes.push('SUBTITLES');\n }\n mediaTypes.forEach(mediaType => {\n const loader = this.mediaTypes_[mediaType] && this.mediaTypes_[mediaType].activePlaylistLoader;\n if (loader) {\n loaders.push(loader);\n }\n });\n ['main', 'audio', 'subtitle'].forEach(name => {\n const loader = this[`${name}SegmentLoader_`];\n if (loader && (filter === name || filter === 'all')) {\n loaders.push(loader);\n }\n });\n loaders.forEach(loader => fnNames.forEach(fnName => {\n if (typeof loader[fnName] === 'function') {\n loader[fnName]();\n }\n }));\n }\n /**\n * set the current time on all segment loaders\n *\n * @param {TimeRange} currentTime the current time to set\n * @return {TimeRange} the current time\n */\n\n setCurrentTime(currentTime) {\n const buffered = findRange(this.tech_.buffered(), currentTime);\n if (!(this.mainPlaylistLoader_ && this.mainPlaylistLoader_.media())) {\n // return immediately if the metadata is not ready yet\n return 0;\n } // it's clearly an edge-case but don't thrown an error if asked to\n // seek within an empty playlist\n\n if (!this.mainPlaylistLoader_.media().segments) {\n return 0;\n } // if the seek location is already buffered, continue buffering as usual\n\n if (buffered && buffered.length) {\n return currentTime;\n } // cancel outstanding requests so we begin buffering at the new\n // location\n\n this.mainSegmentLoader_.resetEverything();\n this.mainSegmentLoader_.abort();\n if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n this.audioSegmentLoader_.resetEverything();\n this.audioSegmentLoader_.abort();\n }\n if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n this.subtitleSegmentLoader_.resetEverything();\n this.subtitleSegmentLoader_.abort();\n } // start segment loader loading in case they are paused\n\n this.load();\n }\n /**\n * get the current duration\n *\n * @return {TimeRange} the duration\n */\n\n duration() {\n if (!this.mainPlaylistLoader_) {\n return 0;\n }\n const media = this.mainPlaylistLoader_.media();\n if (!media) {\n // no playlists loaded yet, so can't determine a duration\n return 0;\n } // Don't rely on the media source for duration in the case of a live playlist since\n // setting the native MediaSource's duration to infinity ends up with consequences to\n // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n //\n // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n // however, few browsers have support for setLiveSeekableRange()\n // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n //\n // Until a time when the duration of the media source can be set to infinity, and a\n // seekable range specified across browsers, just return Infinity.\n\n if (!media.endList) {\n return Infinity;\n } // Since this is a VOD video, it is safe to rely on the media source's duration (if\n // available). If it's not available, fall back to a playlist-calculated estimate.\n\n if (this.mediaSource) {\n return this.mediaSource.duration;\n }\n return Vhs$1.Playlist.duration(media);\n }\n /**\n * check the seekable range\n *\n * @return {TimeRange} the seekable range\n */\n\n seekable() {\n return this.seekable_;\n }\n onSyncInfoUpdate_() {\n let audioSeekable; // TODO check for creation of both source buffers before updating seekable\n //\n // A fix was made to this function where a check for\n // this.sourceUpdater_.hasCreatedSourceBuffers\n // was added to ensure that both source buffers were created before seekable was\n // updated. However, it originally had a bug where it was checking for a true and\n // returning early instead of checking for false. Setting it to check for false to\n // return early though created other issues. A call to play() would check for seekable\n // end without verifying that a seekable range was present. In addition, even checking\n // for that didn't solve some issues, as handleFirstPlay is sometimes worked around\n // due to a media update calling load on the segment loaders, skipping a seek to live,\n // thereby starting live streams at the beginning of the stream rather than at the end.\n //\n // This conditional should be fixed to wait for the creation of two source buffers at\n // the same time as the other sections of code are fixed to properly seek to live and\n // not throw an error due to checking for a seekable end when no seekable range exists.\n //\n // For now, fall back to the older behavior, with the understanding that the seekable\n // range may not be completely correct, leading to a suboptimal initial live point.\n\n if (!this.mainPlaylistLoader_) {\n return;\n }\n let media = this.mainPlaylistLoader_.media();\n if (!media) {\n return;\n }\n let expired = this.syncController_.getExpiredTime(media, this.duration());\n if (expired === null) {\n // not enough information to update seekable\n return;\n }\n const main = this.mainPlaylistLoader_.main;\n const mainSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(main, media));\n if (mainSeekable.length === 0) {\n return;\n }\n if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n expired = this.syncController_.getExpiredTime(media, this.duration());\n if (expired === null) {\n return;\n }\n audioSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(main, media));\n if (audioSeekable.length === 0) {\n return;\n }\n }\n let oldEnd;\n let oldStart;\n if (this.seekable_ && this.seekable_.length) {\n oldEnd = this.seekable_.end(0);\n oldStart = this.seekable_.start(0);\n }\n if (!audioSeekable) {\n // seekable has been calculated based on buffering video data so it\n // can be returned directly\n this.seekable_ = mainSeekable;\n } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n // seekables are pretty far off, rely on main\n this.seekable_ = mainSeekable;\n } else {\n this.seekable_ = createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n } // seekable is the same as last time\n\n if (this.seekable_ && this.seekable_.length) {\n if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {\n return;\n }\n }\n this.logger_(`seekable updated [${printableRange(this.seekable_)}]`);\n this.tech_.trigger('seekablechanged');\n }\n /**\n * Update the player duration\n */\n\n updateDuration(isLive) {\n if (this.updateDuration_) {\n this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n this.updateDuration_ = null;\n }\n if (this.mediaSource.readyState !== 'open') {\n this.updateDuration_ = this.updateDuration.bind(this, isLive);\n this.mediaSource.addEventListener('sourceopen', this.updateDuration_);\n return;\n }\n if (isLive) {\n const seekable = this.seekable();\n if (!seekable.length) {\n return;\n } // Even in the case of a live playlist, the native MediaSource's duration should not\n // be set to Infinity (even though this would be expected for a live playlist), since\n // setting the native MediaSource's duration to infinity ends up with consequences to\n // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n //\n // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n // however, few browsers have support for setLiveSeekableRange()\n // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n //\n // Until a time when the duration of the media source can be set to infinity, and a\n // seekable range specified across browsers, the duration should be greater than or\n // equal to the last possible seekable value.\n // MediaSource duration starts as NaN\n // It is possible (and probable) that this case will never be reached for many\n // sources, since the MediaSource reports duration as the highest value without\n // accounting for timestamp offset. For example, if the timestamp offset is -100 and\n // we buffered times 0 to 100 with real times of 100 to 200, even though current\n // time will be between 0 and 100, the native media source may report the duration\n // as 200. However, since we report duration separate from the media source (as\n // Infinity), and as long as the native media source duration value is greater than\n // our reported seekable range, seeks will work as expected. The large number as\n // duration for live is actually a strategy used by some players to work around the\n // issue of live seekable ranges cited above.\n\n if (isNaN(this.mediaSource.duration) || this.mediaSource.duration < seekable.end(seekable.length - 1)) {\n this.sourceUpdater_.setDuration(seekable.end(seekable.length - 1));\n }\n return;\n }\n const buffered = this.tech_.buffered();\n let duration = Vhs$1.Playlist.duration(this.mainPlaylistLoader_.media());\n if (buffered.length > 0) {\n duration = Math.max(duration, buffered.end(buffered.length - 1));\n }\n if (this.mediaSource.duration !== duration) {\n this.sourceUpdater_.setDuration(duration);\n }\n }\n /**\n * dispose of the PlaylistController and everything\n * that it controls\n */\n\n dispose() {\n this.trigger('dispose');\n this.decrypter_.terminate();\n this.mainPlaylistLoader_.dispose();\n this.mainSegmentLoader_.dispose();\n if (this.loadOnPlay_) {\n this.tech_.off('play', this.loadOnPlay_);\n }\n ['AUDIO', 'SUBTITLES'].forEach(type => {\n const groups = this.mediaTypes_[type].groups;\n for (const id in groups) {\n groups[id].forEach(group => {\n if (group.playlistLoader) {\n group.playlistLoader.dispose();\n }\n });\n }\n });\n this.audioSegmentLoader_.dispose();\n this.subtitleSegmentLoader_.dispose();\n this.sourceUpdater_.dispose();\n this.timelineChangeController_.dispose();\n this.stopABRTimer_();\n if (this.updateDuration_) {\n this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n }\n this.mediaSource.removeEventListener('durationchange', this.handleDurationChange_); // load the media source into the player\n\n this.mediaSource.removeEventListener('sourceopen', this.handleSourceOpen_);\n this.mediaSource.removeEventListener('sourceended', this.handleSourceEnded_);\n this.off();\n }\n /**\n * return the main playlist object if we have one\n *\n * @return {Object} the main playlist object that we parsed\n */\n\n main() {\n return this.mainPlaylistLoader_.main;\n }\n /**\n * return the currently selected playlist\n *\n * @return {Object} the currently selected playlist object that we parsed\n */\n\n media() {\n // playlist loader will not return media if it has not been fully loaded\n return this.mainPlaylistLoader_.media() || this.initialMedia_;\n }\n areMediaTypesKnown_() {\n const usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n const hasMainMediaInfo = !!this.mainSegmentLoader_.getCurrentMediaInfo_(); // if we are not using an audio loader, then we have audio media info\n // otherwise check on the segment loader.\n\n const hasAudioMediaInfo = !usingAudioLoader ? true : !!this.audioSegmentLoader_.getCurrentMediaInfo_(); // one or both loaders has not loaded sufficently to get codecs\n\n if (!hasMainMediaInfo || !hasAudioMediaInfo) {\n return false;\n }\n return true;\n }\n getCodecsOrExclude_() {\n const media = {\n main: this.mainSegmentLoader_.getCurrentMediaInfo_() || {},\n audio: this.audioSegmentLoader_.getCurrentMediaInfo_() || {}\n };\n const playlist = this.mainSegmentLoader_.getPendingSegmentPlaylist() || this.media(); // set \"main\" media equal to video\n\n media.video = media.main;\n const playlistCodecs = codecsForPlaylist(this.main(), playlist);\n const codecs = {};\n const usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n if (media.main.hasVideo) {\n codecs.video = playlistCodecs.video || media.main.videoCodec || DEFAULT_VIDEO_CODEC;\n }\n if (media.main.isMuxed) {\n codecs.video += `,${playlistCodecs.audio || media.main.audioCodec || DEFAULT_AUDIO_CODEC}`;\n }\n if (media.main.hasAudio && !media.main.isMuxed || media.audio.hasAudio || usingAudioLoader) {\n codecs.audio = playlistCodecs.audio || media.main.audioCodec || media.audio.audioCodec || DEFAULT_AUDIO_CODEC; // set audio isFmp4 so we use the correct \"supports\" function below\n\n media.audio.isFmp4 = media.main.hasAudio && !media.main.isMuxed ? media.main.isFmp4 : media.audio.isFmp4;\n } // no codecs, no playback.\n\n if (!codecs.audio && !codecs.video) {\n this.excludePlaylist({\n playlistToExclude: playlist,\n error: {\n message: 'Could not determine codecs for playlist.'\n },\n playlistExclusionDuration: Infinity\n });\n return;\n } // fmp4 relies on browser support, while ts relies on muxer support\n\n const supportFunction = (isFmp4, codec) => isFmp4 ? browserSupportsCodec(codec) : muxerSupportsCodec(codec);\n const unsupportedCodecs = {};\n let unsupportedAudio;\n ['video', 'audio'].forEach(function (type) {\n if (codecs.hasOwnProperty(type) && !supportFunction(media[type].isFmp4, codecs[type])) {\n const supporter = media[type].isFmp4 ? 'browser' : 'muxer';\n unsupportedCodecs[supporter] = unsupportedCodecs[supporter] || [];\n unsupportedCodecs[supporter].push(codecs[type]);\n if (type === 'audio') {\n unsupportedAudio = supporter;\n }\n }\n });\n if (usingAudioLoader && unsupportedAudio && playlist.attributes.AUDIO) {\n const audioGroup = playlist.attributes.AUDIO;\n this.main().playlists.forEach(variant => {\n const variantAudioGroup = variant.attributes && variant.attributes.AUDIO;\n if (variantAudioGroup === audioGroup && variant !== playlist) {\n variant.excludeUntil = Infinity;\n }\n });\n this.logger_(`excluding audio group ${audioGroup} as ${unsupportedAudio} does not support codec(s): \"${codecs.audio}\"`);\n } // if we have any unsupported codecs exclude this playlist.\n\n if (Object.keys(unsupportedCodecs).length) {\n const message = Object.keys(unsupportedCodecs).reduce((acc, supporter) => {\n if (acc) {\n acc += ', ';\n }\n acc += `${supporter} does not support codec(s): \"${unsupportedCodecs[supporter].join(',')}\"`;\n return acc;\n }, '') + '.';\n this.excludePlaylist({\n playlistToExclude: playlist,\n error: {\n internal: true,\n message\n },\n playlistExclusionDuration: Infinity\n });\n return;\n } // check if codec switching is happening\n\n if (this.sourceUpdater_.hasCreatedSourceBuffers() && !this.sourceUpdater_.canChangeType()) {\n const switchMessages = [];\n ['video', 'audio'].forEach(type => {\n const newCodec = (parseCodecs(this.sourceUpdater_.codecs[type] || '')[0] || {}).type;\n const oldCodec = (parseCodecs(codecs[type] || '')[0] || {}).type;\n if (newCodec && oldCodec && newCodec.toLowerCase() !== oldCodec.toLowerCase()) {\n switchMessages.push(`\"${this.sourceUpdater_.codecs[type]}\" -> \"${codecs[type]}\"`);\n }\n });\n if (switchMessages.length) {\n this.excludePlaylist({\n playlistToExclude: playlist,\n error: {\n message: `Codec switching not supported: ${switchMessages.join(', ')}.`,\n internal: true\n },\n playlistExclusionDuration: Infinity\n });\n return;\n }\n } // TODO: when using the muxer shouldn't we just return\n // the codecs that the muxer outputs?\n\n return codecs;\n }\n /**\n * Create source buffers and exlude any incompatible renditions.\n *\n * @private\n */\n\n tryToCreateSourceBuffers_() {\n // media source is not ready yet or sourceBuffers are already\n // created.\n if (this.mediaSource.readyState !== 'open' || this.sourceUpdater_.hasCreatedSourceBuffers()) {\n return;\n }\n if (!this.areMediaTypesKnown_()) {\n return;\n }\n const codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n if (!codecs) {\n return;\n }\n this.sourceUpdater_.createSourceBuffers(codecs);\n const codecString = [codecs.video, codecs.audio].filter(Boolean).join(',');\n this.excludeIncompatibleVariants_(codecString);\n }\n /**\n * Excludes playlists with codecs that are unsupported by the muxer and browser.\n */\n\n excludeUnsupportedVariants_() {\n const playlists = this.main().playlists;\n const ids = []; // TODO: why don't we have a property to loop through all\n // playlist? Why did we ever mix indexes and keys?\n\n Object.keys(playlists).forEach(key => {\n const variant = playlists[key]; // check if we already processed this playlist.\n\n if (ids.indexOf(variant.id) !== -1) {\n return;\n }\n ids.push(variant.id);\n const codecs = codecsForPlaylist(this.main, variant);\n const unsupported = [];\n if (codecs.audio && !muxerSupportsCodec(codecs.audio) && !browserSupportsCodec(codecs.audio)) {\n unsupported.push(`audio codec ${codecs.audio}`);\n }\n if (codecs.video && !muxerSupportsCodec(codecs.video) && !browserSupportsCodec(codecs.video)) {\n unsupported.push(`video codec ${codecs.video}`);\n }\n if (codecs.text && codecs.text === 'stpp.ttml.im1t') {\n unsupported.push(`text codec ${codecs.text}`);\n }\n if (unsupported.length) {\n variant.excludeUntil = Infinity;\n this.logger_(`excluding ${variant.id} for unsupported: ${unsupported.join(', ')}`);\n }\n });\n }\n /**\n * Exclude playlists that are known to be codec or\n * stream-incompatible with the SourceBuffer configuration. For\n * instance, Media Source Extensions would cause the video element to\n * stall waiting for video data if you switched from a variant with\n * video and audio to an audio-only one.\n *\n * @param {Object} media a media playlist compatible with the current\n * set of SourceBuffers. Variants in the current main playlist that\n * do not appear to have compatible codec or stream configurations\n * will be excluded from the default playlist selection algorithm\n * indefinitely.\n * @private\n */\n\n excludeIncompatibleVariants_(codecString) {\n const ids = [];\n const playlists = this.main().playlists;\n const codecs = unwrapCodecList(parseCodecs(codecString));\n const codecCount_ = codecCount(codecs);\n const videoDetails = codecs.video && parseCodecs(codecs.video)[0] || null;\n const audioDetails = codecs.audio && parseCodecs(codecs.audio)[0] || null;\n Object.keys(playlists).forEach(key => {\n const variant = playlists[key]; // check if we already processed this playlist.\n // or it if it is already excluded forever.\n\n if (ids.indexOf(variant.id) !== -1 || variant.excludeUntil === Infinity) {\n return;\n }\n ids.push(variant.id);\n const exclusionReasons = []; // get codecs from the playlist for this variant\n\n const variantCodecs = codecsForPlaylist(this.mainPlaylistLoader_.main, variant);\n const variantCodecCount = codecCount(variantCodecs); // if no codecs are listed, we cannot determine that this\n // variant is incompatible. Wait for mux.js to probe\n\n if (!variantCodecs.audio && !variantCodecs.video) {\n return;\n } // TODO: we can support this by removing the\n // old media source and creating a new one, but it will take some work.\n // The number of streams cannot change\n\n if (variantCodecCount !== codecCount_) {\n exclusionReasons.push(`codec count \"${variantCodecCount}\" !== \"${codecCount_}\"`);\n } // only exclude playlists by codec change, if codecs cannot switch\n // during playback.\n\n if (!this.sourceUpdater_.canChangeType()) {\n const variantVideoDetails = variantCodecs.video && parseCodecs(variantCodecs.video)[0] || null;\n const variantAudioDetails = variantCodecs.audio && parseCodecs(variantCodecs.audio)[0] || null; // the video codec cannot change\n\n if (variantVideoDetails && videoDetails && variantVideoDetails.type.toLowerCase() !== videoDetails.type.toLowerCase()) {\n exclusionReasons.push(`video codec \"${variantVideoDetails.type}\" !== \"${videoDetails.type}\"`);\n } // the audio codec cannot change\n\n if (variantAudioDetails && audioDetails && variantAudioDetails.type.toLowerCase() !== audioDetails.type.toLowerCase()) {\n exclusionReasons.push(`audio codec \"${variantAudioDetails.type}\" !== \"${audioDetails.type}\"`);\n }\n }\n if (exclusionReasons.length) {\n variant.excludeUntil = Infinity;\n this.logger_(`excluding ${variant.id}: ${exclusionReasons.join(' && ')}`);\n }\n });\n }\n updateAdCues_(media) {\n let offset = 0;\n const seekable = this.seekable();\n if (seekable.length) {\n offset = seekable.start(0);\n }\n updateAdCues(media, this.cueTagsTrack_, offset);\n }\n /**\n * Calculates the desired forward buffer length based on current time\n *\n * @return {number} Desired forward buffer length in seconds\n */\n\n goalBufferLength() {\n const currentTime = this.tech_.currentTime();\n const initial = Config.GOAL_BUFFER_LENGTH;\n const rate = Config.GOAL_BUFFER_LENGTH_RATE;\n const max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);\n return Math.min(initial + currentTime * rate, max);\n }\n /**\n * Calculates the desired buffer low water line based on current time\n *\n * @return {number} Desired buffer low water line in seconds\n */\n\n bufferLowWaterLine() {\n const currentTime = this.tech_.currentTime();\n const initial = Config.BUFFER_LOW_WATER_LINE;\n const rate = Config.BUFFER_LOW_WATER_LINE_RATE;\n const max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);\n const newMax = Math.max(initial, Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);\n return Math.min(initial + currentTime * rate, this.bufferBasedABR ? newMax : max);\n }\n bufferHighWaterLine() {\n return Config.BUFFER_HIGH_WATER_LINE;\n }\n }\n\n /**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The main playlist loader\n * @param {string} playlistID - id of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\n\n const enableFunction = (loader, playlistID, changePlaylistFn) => enable => {\n const playlist = loader.main.playlists[playlistID];\n const incompatible = isIncompatible(playlist);\n const currentlyEnabled = isEnabled(playlist);\n if (typeof enable === 'undefined') {\n return currentlyEnabled;\n }\n if (enable) {\n delete playlist.disabled;\n } else {\n playlist.disabled = true;\n }\n if (enable !== currentlyEnabled && !incompatible) {\n // Ensure the outside world knows about our changes\n changePlaylistFn();\n if (enable) {\n loader.trigger('renditionenabled');\n } else {\n loader.trigger('renditiondisabled');\n }\n }\n return enable;\n };\n /**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\n class Representation {\n constructor(vhsHandler, playlist, id) {\n const {\n playlistController_: pc\n } = vhsHandler;\n const qualityChangeFunction = pc.fastQualityChange_.bind(pc); // some playlist attributes are optional\n\n if (playlist.attributes) {\n const resolution = playlist.attributes.RESOLUTION;\n this.width = resolution && resolution.width;\n this.height = resolution && resolution.height;\n this.bandwidth = playlist.attributes.BANDWIDTH;\n this.frameRate = playlist.attributes['FRAME-RATE'];\n }\n this.codecs = codecsForPlaylist(pc.main(), playlist);\n this.playlist = playlist; // The id is simply the ordinality of the media playlist\n // within the main playlist\n\n this.id = id; // Partially-apply the enableFunction to create a playlist-\n // specific variant\n\n this.enabled = enableFunction(vhsHandler.playlists, playlist.id, qualityChangeFunction);\n }\n }\n /**\n * A mixin function that adds the `representations` api to an instance\n * of the VhsHandler class\n *\n * @param {VhsHandler} vhsHandler - An instance of VhsHandler to add the\n * representation API into\n */\n\n const renditionSelectionMixin = function (vhsHandler) {\n // Add a single API-specific function to the VhsHandler instance\n vhsHandler.representations = () => {\n const main = vhsHandler.playlistController_.main();\n const playlists = isAudioOnly(main) ? vhsHandler.playlistController_.getAudioTrackPlaylists_() : main.playlists;\n if (!playlists) {\n return [];\n }\n return playlists.filter(media => !isIncompatible(media)).map((e, i) => new Representation(vhsHandler, e, e.id));\n };\n };\n\n /**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n\n const timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n /**\n * @class PlaybackWatcher\n */\n\n class PlaybackWatcher {\n /**\n * Represents an PlaybackWatcher object.\n *\n * @class\n * @param {Object} options an object that includes the tech and settings\n */\n constructor(options) {\n this.playlistController_ = options.playlistController;\n this.tech_ = options.tech;\n this.seekable = options.seekable;\n this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;\n this.liveRangeSafeTimeDelta = options.liveRangeSafeTimeDelta;\n this.media = options.media;\n this.consecutiveUpdates = 0;\n this.lastRecordedTime = null;\n this.checkCurrentTimeTimeout_ = null;\n this.logger_ = logger('PlaybackWatcher');\n this.logger_('initialize');\n const playHandler = () => this.monitorCurrentTime_();\n const canPlayHandler = () => this.monitorCurrentTime_();\n const waitingHandler = () => this.techWaiting_();\n const cancelTimerHandler = () => this.resetTimeUpdate_();\n const pc = this.playlistController_;\n const loaderTypes = ['main', 'subtitle', 'audio'];\n const loaderChecks = {};\n loaderTypes.forEach(type => {\n loaderChecks[type] = {\n reset: () => this.resetSegmentDownloads_(type),\n updateend: () => this.checkSegmentDownloads_(type)\n };\n pc[`${type}SegmentLoader_`].on('appendsdone', loaderChecks[type].updateend); // If a rendition switch happens during a playback stall where the buffer\n // isn't changing we want to reset. We cannot assume that the new rendition\n // will also be stalled, until after new appends.\n\n pc[`${type}SegmentLoader_`].on('playlistupdate', loaderChecks[type].reset); // Playback stalls should not be detected right after seeking.\n // This prevents one segment playlists (single vtt or single segment content)\n // from being detected as stalling. As the buffer will not change in those cases, since\n // the buffer is the entire video duration.\n\n this.tech_.on(['seeked', 'seeking'], loaderChecks[type].reset);\n });\n /**\n * We check if a seek was into a gap through the following steps:\n * 1. We get a seeking event and we do not get a seeked event. This means that\n * a seek was attempted but not completed.\n * 2. We run `fixesBadSeeks_` on segment loader appends. This means that we already\n * removed everything from our buffer and appended a segment, and should be ready\n * to check for gaps.\n */\n\n const setSeekingHandlers = fn => {\n ['main', 'audio'].forEach(type => {\n pc[`${type}SegmentLoader_`][fn]('appended', this.seekingAppendCheck_);\n });\n };\n this.seekingAppendCheck_ = () => {\n if (this.fixesBadSeeks_()) {\n this.consecutiveUpdates = 0;\n this.lastRecordedTime = this.tech_.currentTime();\n setSeekingHandlers('off');\n }\n };\n this.clearSeekingAppendCheck_ = () => setSeekingHandlers('off');\n this.watchForBadSeeking_ = () => {\n this.clearSeekingAppendCheck_();\n setSeekingHandlers('on');\n };\n this.tech_.on('seeked', this.clearSeekingAppendCheck_);\n this.tech_.on('seeking', this.watchForBadSeeking_);\n this.tech_.on('waiting', waitingHandler);\n this.tech_.on(timerCancelEvents, cancelTimerHandler);\n this.tech_.on('canplay', canPlayHandler);\n /*\n An edge case exists that results in gaps not being skipped when they exist at the beginning of a stream. This case\n is surfaced in one of two ways:\n 1) The `waiting` event is fired before the player has buffered content, making it impossible\n to find or skip the gap. The `waiting` event is followed by a `play` event. On first play\n we can check if playback is stalled due to a gap, and skip the gap if necessary.\n 2) A source with a gap at the beginning of the stream is loaded programatically while the player\n is in a playing state. To catch this case, it's important that our one-time play listener is setup\n even if the player is in a playing state\n */\n\n this.tech_.one('play', playHandler); // Define the dispose function to clean up our events\n\n this.dispose = () => {\n this.clearSeekingAppendCheck_();\n this.logger_('dispose');\n this.tech_.off('waiting', waitingHandler);\n this.tech_.off(timerCancelEvents, cancelTimerHandler);\n this.tech_.off('canplay', canPlayHandler);\n this.tech_.off('play', playHandler);\n this.tech_.off('seeking', this.watchForBadSeeking_);\n this.tech_.off('seeked', this.clearSeekingAppendCheck_);\n loaderTypes.forEach(type => {\n pc[`${type}SegmentLoader_`].off('appendsdone', loaderChecks[type].updateend);\n pc[`${type}SegmentLoader_`].off('playlistupdate', loaderChecks[type].reset);\n this.tech_.off(['seeked', 'seeking'], loaderChecks[type].reset);\n });\n if (this.checkCurrentTimeTimeout_) {\n window.clearTimeout(this.checkCurrentTimeTimeout_);\n }\n this.resetTimeUpdate_();\n };\n }\n /**\n * Periodically check current time to see if playback stopped\n *\n * @private\n */\n\n monitorCurrentTime_() {\n this.checkCurrentTime_();\n if (this.checkCurrentTimeTimeout_) {\n window.clearTimeout(this.checkCurrentTimeTimeout_);\n } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n\n this.checkCurrentTimeTimeout_ = window.setTimeout(this.monitorCurrentTime_.bind(this), 250);\n }\n /**\n * Reset stalled download stats for a specific type of loader\n *\n * @param {string} type\n * The segment loader type to check.\n *\n * @listens SegmentLoader#playlistupdate\n * @listens Tech#seeking\n * @listens Tech#seeked\n */\n\n resetSegmentDownloads_(type) {\n const loader = this.playlistController_[`${type}SegmentLoader_`];\n if (this[`${type}StalledDownloads_`] > 0) {\n this.logger_(`resetting possible stalled download count for ${type} loader`);\n }\n this[`${type}StalledDownloads_`] = 0;\n this[`${type}Buffered_`] = loader.buffered_();\n }\n /**\n * Checks on every segment `appendsdone` to see\n * if segment appends are making progress. If they are not\n * and we are still downloading bytes. We exclude the playlist.\n *\n * @param {string} type\n * The segment loader type to check.\n *\n * @listens SegmentLoader#appendsdone\n */\n\n checkSegmentDownloads_(type) {\n const pc = this.playlistController_;\n const loader = pc[`${type}SegmentLoader_`];\n const buffered = loader.buffered_();\n const isBufferedDifferent = isRangeDifferent(this[`${type}Buffered_`], buffered);\n this[`${type}Buffered_`] = buffered; // if another watcher is going to fix the issue or\n // the buffered value for this loader changed\n // appends are working\n\n if (isBufferedDifferent) {\n this.resetSegmentDownloads_(type);\n return;\n }\n this[`${type}StalledDownloads_`]++;\n this.logger_(`found #${this[`${type}StalledDownloads_`]} ${type} appends that did not increase buffer (possible stalled download)`, {\n playlistId: loader.playlist_ && loader.playlist_.id,\n buffered: timeRangesToArray(buffered)\n }); // after 10 possibly stalled appends with no reset, exclude\n\n if (this[`${type}StalledDownloads_`] < 10) {\n return;\n }\n this.logger_(`${type} loader stalled download exclusion`);\n this.resetSegmentDownloads_(type);\n this.tech_.trigger({\n type: 'usage',\n name: `vhs-${type}-download-exclusion`\n });\n if (type === 'subtitle') {\n return;\n } // TODO: should we exclude audio tracks rather than main tracks\n // when type is audio?\n\n pc.excludePlaylist({\n error: {\n message: `Excessive ${type} segment downloading detected.`\n },\n playlistExclusionDuration: Infinity\n });\n }\n /**\n * The purpose of this function is to emulate the \"waiting\" event on\n * browsers that do not emit it when they are waiting for more\n * data to continue playback\n *\n * @private\n */\n\n checkCurrentTime_() {\n if (this.tech_.paused() || this.tech_.seeking()) {\n return;\n }\n const currentTime = this.tech_.currentTime();\n const buffered = this.tech_.buffered();\n if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n // If current time is at the end of the final buffered region, then any playback\n // stall is most likely caused by buffering in a low bandwidth environment. The tech\n // should fire a `waiting` event in this scenario, but due to browser and tech\n // inconsistencies. Calling `techWaiting_` here allows us to simulate\n // responding to a native `waiting` event when the tech fails to emit one.\n return this.techWaiting_();\n }\n if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n this.consecutiveUpdates++;\n this.waiting_();\n } else if (currentTime === this.lastRecordedTime) {\n this.consecutiveUpdates++;\n } else {\n this.consecutiveUpdates = 0;\n this.lastRecordedTime = currentTime;\n }\n }\n /**\n * Resets the 'timeupdate' mechanism designed to detect that we are stalled\n *\n * @private\n */\n\n resetTimeUpdate_() {\n this.consecutiveUpdates = 0;\n }\n /**\n * Fixes situations where there's a bad seek\n *\n * @return {boolean} whether an action was taken to fix the seek\n * @private\n */\n\n fixesBadSeeks_() {\n const seeking = this.tech_.seeking();\n if (!seeking) {\n return false;\n } // TODO: It's possible that these seekable checks should be moved out of this function\n // and into a function that runs on seekablechange. It's also possible that we only need\n // afterSeekableWindow as the buffered check at the bottom is good enough to handle before\n // seekable range.\n\n const seekable = this.seekable();\n const currentTime = this.tech_.currentTime();\n const isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);\n let seekTo;\n if (isAfterSeekableRange) {\n const seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n\n seekTo = seekableEnd;\n }\n if (this.beforeSeekableWindow_(seekable, currentTime)) {\n const seekableStart = seekable.start(0); // sync to the beginning of the live window\n // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n\n seekTo = seekableStart + (\n // if the playlist is too short and the seekable range is an exact time (can\n // happen in live with a 3 segment playlist), then don't use a time delta\n seekableStart === seekable.end(0) ? 0 : SAFE_TIME_DELTA);\n }\n if (typeof seekTo !== 'undefined') {\n this.logger_(`Trying to seek outside of seekable at time ${currentTime} with ` + `seekable range ${printableRange(seekable)}. Seeking to ` + `${seekTo}.`);\n this.tech_.setCurrentTime(seekTo);\n return true;\n }\n const sourceUpdater = this.playlistController_.sourceUpdater_;\n const buffered = this.tech_.buffered();\n const audioBuffered = sourceUpdater.audioBuffer ? sourceUpdater.audioBuffered() : null;\n const videoBuffered = sourceUpdater.videoBuffer ? sourceUpdater.videoBuffered() : null;\n const media = this.media(); // verify that at least two segment durations or one part duration have been\n // appended before checking for a gap.\n\n const minAppendedDuration = media.partTargetDuration ? media.partTargetDuration : (media.targetDuration - TIME_FUDGE_FACTOR) * 2; // verify that at least two segment durations have been\n // appended before checking for a gap.\n\n const bufferedToCheck = [audioBuffered, videoBuffered];\n for (let i = 0; i < bufferedToCheck.length; i++) {\n // skip null buffered\n if (!bufferedToCheck[i]) {\n continue;\n }\n const timeAhead = timeAheadOf(bufferedToCheck[i], currentTime); // if we are less than two video/audio segment durations or one part\n // duration behind we haven't appended enough to call this a bad seek.\n\n if (timeAhead < minAppendedDuration) {\n return false;\n }\n }\n const nextRange = findNextRange(buffered, currentTime); // we have appended enough content, but we don't have anything buffered\n // to seek over the gap\n\n if (nextRange.length === 0) {\n return false;\n }\n seekTo = nextRange.start(0) + SAFE_TIME_DELTA;\n this.logger_(`Buffered region starts (${nextRange.start(0)}) ` + ` just beyond seek point (${currentTime}). Seeking to ${seekTo}.`);\n this.tech_.setCurrentTime(seekTo);\n return true;\n }\n /**\n * Handler for situations when we determine the player is waiting.\n *\n * @private\n */\n\n waiting_() {\n if (this.techWaiting_()) {\n return;\n } // All tech waiting checks failed. Use last resort correction\n\n const currentTime = this.tech_.currentTime();\n const buffered = this.tech_.buffered();\n const currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered\n // region with no indication that anything is amiss (seen in Firefox). Seeking to\n // currentTime is usually enough to kickstart the player. This checks that the player\n // is currently within a buffered region before attempting a corrective seek.\n // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n // make sure there is ~3 seconds of forward buffer before taking any corrective action\n // to avoid triggering an `unknownwaiting` event when the network is slow.\n\n if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n this.resetTimeUpdate_();\n this.tech_.setCurrentTime(currentTime);\n this.logger_(`Stopped at ${currentTime} while inside a buffered region ` + `[${currentRange.start(0)} -> ${currentRange.end(0)}]. Attempting to resume ` + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS\n\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-unknown-waiting'\n });\n return;\n }\n }\n /**\n * Handler for situations when the tech fires a `waiting` event\n *\n * @return {boolean}\n * True if an action (or none) was needed to correct the waiting. False if no\n * checks passed\n * @private\n */\n\n techWaiting_() {\n const seekable = this.seekable();\n const currentTime = this.tech_.currentTime();\n if (this.tech_.seeking()) {\n // Tech is seeking or already waiting on another action, no action needed\n return true;\n }\n if (this.beforeSeekableWindow_(seekable, currentTime)) {\n const livePoint = seekable.end(seekable.length - 1);\n this.logger_(`Fell out of live window at time ${currentTime}. Seeking to ` + `live point (seekable end) ${livePoint}`);\n this.resetTimeUpdate_();\n this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS\n\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-live-resync'\n });\n return true;\n }\n const sourceUpdater = this.tech_.vhs.playlistController_.sourceUpdater_;\n const buffered = this.tech_.buffered();\n const videoUnderflow = this.videoUnderflow_({\n audioBuffered: sourceUpdater.audioBuffered(),\n videoBuffered: sourceUpdater.videoBuffered(),\n currentTime\n });\n if (videoUnderflow) {\n // Even though the video underflowed and was stuck in a gap, the audio overplayed\n // the gap, leading currentTime into a buffered range. Seeking to currentTime\n // allows the video to catch up to the audio position without losing any audio\n // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n this.resetTimeUpdate_();\n this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS\n\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-video-underflow'\n });\n return true;\n }\n const nextRange = findNextRange(buffered, currentTime); // check for gap\n\n if (nextRange.length > 0) {\n this.logger_(`Stopped at ${currentTime} and seeking to ${nextRange.start(0)}`);\n this.resetTimeUpdate_();\n this.skipTheGap_(currentTime);\n return true;\n } // All checks failed. Returning false to indicate failure to correct waiting\n\n return false;\n }\n afterSeekableWindow_(seekable, currentTime, playlist, allowSeeksWithinUnsafeLiveWindow = false) {\n if (!seekable.length) {\n // we can't make a solid case if there's no seekable, default to false\n return false;\n }\n let allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;\n const isLive = !playlist.endList;\n if (isLive && allowSeeksWithinUnsafeLiveWindow) {\n allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;\n }\n if (currentTime > allowedEnd) {\n return true;\n }\n return false;\n }\n beforeSeekableWindow_(seekable, currentTime) {\n if (seekable.length &&\n // can't fall before 0 and 0 seekable start identifies VOD stream\n seekable.start(0) > 0 && currentTime < seekable.start(0) - this.liveRangeSafeTimeDelta) {\n return true;\n }\n return false;\n }\n videoUnderflow_({\n videoBuffered,\n audioBuffered,\n currentTime\n }) {\n // audio only content will not have video underflow :)\n if (!videoBuffered) {\n return;\n }\n let gap; // find a gap in demuxed content.\n\n if (videoBuffered.length && audioBuffered.length) {\n // in Chrome audio will continue to play for ~3s when we run out of video\n // so we have to check that the video buffer did have some buffer in the\n // past.\n const lastVideoRange = findRange(videoBuffered, currentTime - 3);\n const videoRange = findRange(videoBuffered, currentTime);\n const audioRange = findRange(audioBuffered, currentTime);\n if (audioRange.length && !videoRange.length && lastVideoRange.length) {\n gap = {\n start: lastVideoRange.end(0),\n end: audioRange.end(0)\n };\n } // find a gap in muxed content.\n } else {\n const nextRange = findNextRange(videoBuffered, currentTime); // Even if there is no available next range, there is still a possibility we are\n // stuck in a gap due to video underflow.\n\n if (!nextRange.length) {\n gap = this.gapFromVideoUnderflow_(videoBuffered, currentTime);\n }\n }\n if (gap) {\n this.logger_(`Encountered a gap in video from ${gap.start} to ${gap.end}. ` + `Seeking to current time ${currentTime}`);\n return true;\n }\n return false;\n }\n /**\n * Timer callback. If playback still has not proceeded, then we seek\n * to the start of the next buffered region.\n *\n * @private\n */\n\n skipTheGap_(scheduledCurrentTime) {\n const buffered = this.tech_.buffered();\n const currentTime = this.tech_.currentTime();\n const nextRange = findNextRange(buffered, currentTime);\n this.resetTimeUpdate_();\n if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n return;\n }\n this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played\n\n this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-gap-skip'\n });\n }\n gapFromVideoUnderflow_(buffered, currentTime) {\n // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n // playing for ~3 seconds after the video gap starts. This is done to account for\n // video buffer underflow/underrun (note that this is not done when there is audio\n // buffer underflow/underrun -- in that case the video will stop as soon as it\n // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n // video stalls). The player's time will reflect the playthrough of audio, so the\n // time will appear as if we are in a buffered region, even if we are stuck in a\n // \"gap.\"\n //\n // Example:\n // video buffer: 0 => 10.1, 10.2 => 20\n // audio buffer: 0 => 20\n // overall buffer: 0 => 10.1, 10.2 => 20\n // current time: 13\n //\n // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n // however, the audio continued playing until it reached ~3 seconds past the gap\n // (13 seconds), at which point it stops as well. Since current time is past the\n // gap, findNextRange will return no ranges.\n //\n // To check for this issue, we see if there is a gap that starts somewhere within\n // a 3 second range (3 seconds +/- 1 second) back from our current time.\n const gaps = findGaps(buffered);\n for (let i = 0; i < gaps.length; i++) {\n const start = gaps.start(i);\n const end = gaps.end(i); // gap is starts no more than 4 seconds back\n\n if (currentTime - start < 4 && currentTime - start > 2) {\n return {\n start,\n end\n };\n }\n }\n return null;\n }\n }\n const defaultOptions = {\n errorInterval: 30,\n getSource(next) {\n const tech = this.tech({\n IWillNotUseThisInPlugins: true\n });\n const sourceObj = tech.currentSource_ || this.currentSource();\n return next(sourceObj);\n }\n };\n /**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\n\n const initPlugin = function (player, options) {\n let lastCalled = 0;\n let seekTo = 0;\n const localOptions = merge(defaultOptions, options);\n player.ready(() => {\n player.trigger({\n type: 'usage',\n name: 'vhs-error-reload-initialized'\n });\n });\n /**\n * Player modifications to perform that must wait until `loadedmetadata`\n * has been triggered\n *\n * @private\n */\n\n const loadedMetadataHandler = function () {\n if (seekTo) {\n player.currentTime(seekTo);\n }\n };\n /**\n * Set the source on the player element, play, and seek if necessary\n *\n * @param {Object} sourceObj An object specifying the source url and mime-type to play\n * @private\n */\n\n const setSource = function (sourceObj) {\n if (sourceObj === null || sourceObj === undefined) {\n return;\n }\n seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n player.one('loadedmetadata', loadedMetadataHandler);\n player.src(sourceObj);\n player.trigger({\n type: 'usage',\n name: 'vhs-error-reload'\n });\n player.play();\n };\n /**\n * Attempt to get a source from either the built-in getSource function\n * or a custom function provided via the options\n *\n * @private\n */\n\n const errorHandler = function () {\n // Do not attempt to reload the source if a source-reload occurred before\n // 'errorInterval' time has elapsed since the last source-reload\n if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n player.trigger({\n type: 'usage',\n name: 'vhs-error-reload-canceled'\n });\n return;\n }\n if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n videojs.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n return;\n }\n lastCalled = Date.now();\n return localOptions.getSource.call(player, setSource);\n };\n /**\n * Unbind any event handlers that were bound by the plugin\n *\n * @private\n */\n\n const cleanupEvents = function () {\n player.off('loadedmetadata', loadedMetadataHandler);\n player.off('error', errorHandler);\n player.off('dispose', cleanupEvents);\n };\n /**\n * Cleanup before re-initializing the plugin\n *\n * @param {Object} [newOptions] an object with plugin options\n * @private\n */\n\n const reinitPlugin = function (newOptions) {\n cleanupEvents();\n initPlugin(player, newOptions);\n };\n player.on('error', errorHandler);\n player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before\n // initializing the plugin\n\n player.reloadSourceOnError = reinitPlugin;\n };\n /**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\n\n const reloadSourceOnError = function (options) {\n initPlugin(this, options);\n };\n var version$4 = \"3.0.2\";\n var version$3 = \"6.3.0\";\n var version$2 = \"1.0.1\";\n var version$1 = \"6.0.0\";\n var version = \"4.0.1\";\n\n /**\n * @file videojs-http-streaming.js\n *\n * The main file for the VHS project.\n * License: https://github.com/videojs/videojs-http-streaming/blob/main/LICENSE\n */\n const Vhs = {\n PlaylistLoader,\n Playlist,\n utils,\n STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,\n INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,\n lastBandwidthSelector,\n movingAverageBandwidthSelector,\n comparePlaylistBandwidth,\n comparePlaylistResolution,\n xhr: xhrFactory()\n }; // Define getter/setters for config properties\n\n Object.keys(Config).forEach(prop => {\n Object.defineProperty(Vhs, prop, {\n get() {\n videojs.log.warn(`using Vhs.${prop} is UNSAFE be sure you know what you are doing`);\n return Config[prop];\n },\n set(value) {\n videojs.log.warn(`using Vhs.${prop} is UNSAFE be sure you know what you are doing`);\n if (typeof value !== 'number' || value < 0) {\n videojs.log.warn(`value of Vhs.${prop} must be greater than or equal to 0`);\n return;\n }\n Config[prop] = value;\n }\n });\n });\n const LOCAL_STORAGE_KEY = 'videojs-vhs';\n /**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in vhs.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleVhsMediaChange\n */\n\n const handleVhsMediaChange = function (qualityLevels, playlistLoader) {\n const newPlaylist = playlistLoader.media();\n let selectedIndex = -1;\n for (let i = 0; i < qualityLevels.length; i++) {\n if (qualityLevels[i].id === newPlaylist.id) {\n selectedIndex = i;\n break;\n }\n }\n qualityLevels.selectedIndex_ = selectedIndex;\n qualityLevels.trigger({\n selectedIndex,\n type: 'change'\n });\n };\n /**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} vhs Vhs object to listen to for media events.\n * @function handleVhsLoadedMetadata\n */\n\n const handleVhsLoadedMetadata = function (qualityLevels, vhs) {\n vhs.representations().forEach(rep => {\n qualityLevels.addQualityLevel(rep);\n });\n handleVhsMediaChange(qualityLevels, vhs.playlists);\n }; // VHS is a source handler, not a tech. Make sure attempts to use it\n // as one do not cause exceptions.\n\n Vhs.canPlaySource = function () {\n return videojs.log.warn('VHS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n };\n const emeKeySystems = (keySystemOptions, mainPlaylist, audioPlaylist) => {\n if (!keySystemOptions) {\n return keySystemOptions;\n }\n let codecs = {};\n if (mainPlaylist && mainPlaylist.attributes && mainPlaylist.attributes.CODECS) {\n codecs = unwrapCodecList(parseCodecs(mainPlaylist.attributes.CODECS));\n }\n if (audioPlaylist && audioPlaylist.attributes && audioPlaylist.attributes.CODECS) {\n codecs.audio = audioPlaylist.attributes.CODECS;\n }\n const videoContentType = getMimeForCodec(codecs.video);\n const audioContentType = getMimeForCodec(codecs.audio); // upsert the content types based on the selected playlist\n\n const keySystemContentTypes = {};\n for (const keySystem in keySystemOptions) {\n keySystemContentTypes[keySystem] = {};\n if (audioContentType) {\n keySystemContentTypes[keySystem].audioContentType = audioContentType;\n }\n if (videoContentType) {\n keySystemContentTypes[keySystem].videoContentType = videoContentType;\n } // Default to using the video playlist's PSSH even though they may be different, as\n // videojs-contrib-eme will only accept one in the options.\n //\n // This shouldn't be an issue for most cases as early intialization will handle all\n // unique PSSH values, and if they aren't, then encrypted events should have the\n // specific information needed for the unique license.\n\n if (mainPlaylist.contentProtection && mainPlaylist.contentProtection[keySystem] && mainPlaylist.contentProtection[keySystem].pssh) {\n keySystemContentTypes[keySystem].pssh = mainPlaylist.contentProtection[keySystem].pssh;\n } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'\n // so we need to prevent overwriting the URL entirely\n\n if (typeof keySystemOptions[keySystem] === 'string') {\n keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];\n }\n }\n return merge(keySystemOptions, keySystemContentTypes);\n };\n /**\n * @typedef {Object} KeySystems\n *\n * keySystems configuration for https://github.com/videojs/videojs-contrib-eme\n * Note: not all options are listed here.\n *\n * @property {Uint8Array} [pssh]\n * Protection System Specific Header\n */\n\n /**\n * Goes through all the playlists and collects an array of KeySystems options objects\n * containing each playlist's keySystems and their pssh values, if available.\n *\n * @param {Object[]} playlists\n * The playlists to look through\n * @param {string[]} keySystems\n * The keySystems to collect pssh values for\n *\n * @return {KeySystems[]}\n * An array of KeySystems objects containing available key systems and their\n * pssh values\n */\n\n const getAllPsshKeySystemsOptions = (playlists, keySystems) => {\n return playlists.reduce((keySystemsArr, playlist) => {\n if (!playlist.contentProtection) {\n return keySystemsArr;\n }\n const keySystemsOptions = keySystems.reduce((keySystemsObj, keySystem) => {\n const keySystemOptions = playlist.contentProtection[keySystem];\n if (keySystemOptions && keySystemOptions.pssh) {\n keySystemsObj[keySystem] = {\n pssh: keySystemOptions.pssh\n };\n }\n return keySystemsObj;\n }, {});\n if (Object.keys(keySystemsOptions).length) {\n keySystemsArr.push(keySystemsOptions);\n }\n return keySystemsArr;\n }, []);\n };\n /**\n * Returns a promise that waits for the\n * [eme plugin](https://github.com/videojs/videojs-contrib-eme) to create a key session.\n *\n * Works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449 in non-IE11\n * browsers.\n *\n * As per the above ticket, this is particularly important for Chrome, where, if\n * unencrypted content is appended before encrypted content and the key session has not\n * been created, a MEDIA_ERR_DECODE will be thrown once the encrypted content is reached\n * during playback.\n *\n * @param {Object} player\n * The player instance\n * @param {Object[]} sourceKeySystems\n * The key systems options from the player source\n * @param {Object} [audioMedia]\n * The active audio media playlist (optional)\n * @param {Object[]} mainPlaylists\n * The playlists found on the main playlist object\n *\n * @return {Object}\n * Promise that resolves when the key session has been created\n */\n\n const waitForKeySessionCreation = ({\n player,\n sourceKeySystems,\n audioMedia,\n mainPlaylists\n }) => {\n if (!player.eme.initializeMediaKeys) {\n return Promise.resolve();\n } // TODO should all audio PSSH values be initialized for DRM?\n //\n // All unique video rendition pssh values are initialized for DRM, but here only\n // the initial audio playlist license is initialized. In theory, an encrypted\n // event should be fired if the user switches to an alternative audio playlist\n // where a license is required, but this case hasn't yet been tested. In addition, there\n // may be many alternate audio playlists unlikely to be used (e.g., multiple different\n // languages).\n\n const playlists = audioMedia ? mainPlaylists.concat([audioMedia]) : mainPlaylists;\n const keySystemsOptionsArr = getAllPsshKeySystemsOptions(playlists, Object.keys(sourceKeySystems));\n const initializationFinishedPromises = [];\n const keySessionCreatedPromises = []; // Since PSSH values are interpreted as initData, EME will dedupe any duplicates. The\n // only place where it should not be deduped is for ms-prefixed APIs, but the early\n // return for IE11 above, and the existence of modern EME APIs in addition to\n // ms-prefixed APIs on Edge should prevent this from being a concern.\n // initializeMediaKeys also won't use the webkit-prefixed APIs.\n\n keySystemsOptionsArr.forEach(keySystemsOptions => {\n keySessionCreatedPromises.push(new Promise((resolve, reject) => {\n player.tech_.one('keysessioncreated', resolve);\n }));\n initializationFinishedPromises.push(new Promise((resolve, reject) => {\n player.eme.initializeMediaKeys({\n keySystems: keySystemsOptions\n }, err => {\n if (err) {\n reject(err);\n return;\n }\n resolve();\n });\n }));\n }); // The reasons Promise.race is chosen over Promise.any:\n //\n // * Promise.any is only available in Safari 14+.\n // * None of these promises are expected to reject. If they do reject, it might be\n // better here for the race to surface the rejection, rather than mask it by using\n // Promise.any.\n\n return Promise.race([\n // If a session was previously created, these will all finish resolving without\n // creating a new session, otherwise it will take until the end of all license\n // requests, which is why the key session check is used (to make setup much faster).\n Promise.all(initializationFinishedPromises),\n // Once a single session is created, the browser knows DRM will be used.\n Promise.race(keySessionCreatedPromises)]);\n };\n /**\n * If the [eme](https://github.com/videojs/videojs-contrib-eme) plugin is available, and\n * there are keySystems on the source, sets up source options to prepare the source for\n * eme.\n *\n * @param {Object} player\n * The player instance\n * @param {Object[]} sourceKeySystems\n * The key systems options from the player source\n * @param {Object} media\n * The active media playlist\n * @param {Object} [audioMedia]\n * The active audio media playlist (optional)\n *\n * @return {boolean}\n * Whether or not options were configured and EME is available\n */\n\n const setupEmeOptions = ({\n player,\n sourceKeySystems,\n media,\n audioMedia\n }) => {\n const sourceOptions = emeKeySystems(sourceKeySystems, media, audioMedia);\n if (!sourceOptions) {\n return false;\n }\n player.currentSource().keySystems = sourceOptions; // eme handles the rest of the setup, so if it is missing\n // do nothing.\n\n if (sourceOptions && !player.eme) {\n videojs.log.warn('DRM encrypted source cannot be decrypted without a DRM plugin');\n return false;\n }\n return true;\n };\n const getVhsLocalStorage = () => {\n if (!window.localStorage) {\n return null;\n }\n const storedObject = window.localStorage.getItem(LOCAL_STORAGE_KEY);\n if (!storedObject) {\n return null;\n }\n try {\n return JSON.parse(storedObject);\n } catch (e) {\n // someone may have tampered with the value\n return null;\n }\n };\n const updateVhsLocalStorage = options => {\n if (!window.localStorage) {\n return false;\n }\n let objectToStore = getVhsLocalStorage();\n objectToStore = objectToStore ? merge(objectToStore, options) : options;\n try {\n window.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(objectToStore));\n } catch (e) {\n // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where\n // storage is set to 0).\n // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions\n // No need to perform any operation.\n return false;\n }\n return objectToStore;\n };\n /**\n * Parses VHS-supported media types from data URIs. See\n * https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs\n * for information on data URIs.\n *\n * @param {string} dataUri\n * The data URI\n *\n * @return {string|Object}\n * The parsed object/string, or the original string if no supported media type\n * was found\n */\n\n const expandDataUri = dataUri => {\n if (dataUri.toLowerCase().indexOf('data:application/vnd.videojs.vhs+json,') === 0) {\n return JSON.parse(dataUri.substring(dataUri.indexOf(',') + 1));\n } // no known case for this data URI, return the string as-is\n\n return dataUri;\n };\n /**\n * Whether the browser has built-in HLS support.\n */\n\n Vhs.supportsNativeHls = function () {\n if (!document || !document.createElement) {\n return false;\n }\n const video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't\n\n if (!videojs.getTech('Html5').isSupported()) {\n return false;\n } // HLS manifests can go by many mime-types\n\n const canPlay = [\n // Apple santioned\n 'application/vnd.apple.mpegurl',\n // Apple sanctioned for backwards compatibility\n 'audio/mpegurl',\n // Very common\n 'audio/x-mpegurl',\n // Very common\n 'application/x-mpegurl',\n // Included for completeness\n 'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n return canPlay.some(function (canItPlay) {\n return /maybe|probably/i.test(video.canPlayType(canItPlay));\n });\n }();\n Vhs.supportsNativeDash = function () {\n if (!document || !document.createElement || !videojs.getTech('Html5').isSupported()) {\n return false;\n }\n return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));\n }();\n Vhs.supportsTypeNatively = type => {\n if (type === 'hls') {\n return Vhs.supportsNativeHls;\n }\n if (type === 'dash') {\n return Vhs.supportsNativeDash;\n }\n return false;\n };\n /**\n * VHS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\n\n Vhs.isSupported = function () {\n return videojs.log.warn('VHS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n };\n const Component = videojs.getComponent('Component');\n /**\n * The Vhs Handler object, where we orchestrate all of the parts\n * of VHS to interact with video.js\n *\n * @class VhsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\n class VhsHandler extends Component {\n constructor(source, tech, options) {\n super(tech, options.vhs); // if a tech level `initialBandwidth` option was passed\n // use that over the VHS level `bandwidth` option\n\n if (typeof options.initialBandwidth === 'number') {\n this.options_.bandwidth = options.initialBandwidth;\n }\n this.logger_ = logger('VhsHandler'); // we need access to the player in some cases,\n // so, get it from Video.js via the `playerId`\n\n if (tech.options_ && tech.options_.playerId) {\n const _player = videojs.getPlayer(tech.options_.playerId);\n this.player_ = _player;\n }\n this.tech_ = tech;\n this.source_ = source;\n this.stats = {};\n this.ignoreNextSeekingEvent_ = false;\n this.setOptions_();\n if (this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {\n tech.overrideNativeAudioTracks(true);\n tech.overrideNativeVideoTracks(true);\n } else if (this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n // overriding native VHS only works if audio tracks have been emulated\n // error early if we're misconfigured\n throw new Error('Overriding native VHS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n } // listen for fullscreenchange events for this player so that we\n // can adjust our quality selection quickly\n\n this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], event => {\n const fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n if (fullscreenElement && fullscreenElement.contains(this.tech_.el())) {\n this.playlistController_.fastQualityChange_();\n } else {\n // When leaving fullscreen, since the in page pixel dimensions should be smaller\n // than full screen, see if there should be a rendition switch down to preserve\n // bandwidth.\n this.playlistController_.checkABR_();\n }\n });\n this.on(this.tech_, 'seeking', function () {\n if (this.ignoreNextSeekingEvent_) {\n this.ignoreNextSeekingEvent_ = false;\n return;\n }\n this.setCurrentTime(this.tech_.currentTime());\n });\n this.on(this.tech_, 'error', function () {\n // verify that the error was real and we are loaded\n // enough to have pc loaded.\n if (this.tech_.error() && this.playlistController_) {\n this.playlistController_.pauseLoading();\n }\n });\n this.on(this.tech_, 'play', this.play);\n }\n setOptions_() {\n // defaults\n this.options_.withCredentials = this.options_.withCredentials || false;\n this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;\n this.options_.useDevicePixelRatio = this.options_.useDevicePixelRatio || false;\n this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;\n this.options_.useNetworkInformationApi = this.options_.useNetworkInformationApi || false;\n this.options_.useDtsForTimestampOffset = this.options_.useDtsForTimestampOffset || false;\n this.options_.customTagParsers = this.options_.customTagParsers || [];\n this.options_.customTagMappers = this.options_.customTagMappers || [];\n this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;\n this.options_.llhls = this.options_.llhls === false ? false : true;\n this.options_.bufferBasedABR = this.options_.bufferBasedABR || false;\n if (typeof this.options_.playlistExclusionDuration !== 'number') {\n this.options_.playlistExclusionDuration = 5 * 60;\n }\n if (typeof this.options_.bandwidth !== 'number') {\n if (this.options_.useBandwidthFromLocalStorage) {\n const storedObject = getVhsLocalStorage();\n if (storedObject && storedObject.bandwidth) {\n this.options_.bandwidth = storedObject.bandwidth;\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-bandwidth-from-local-storage'\n });\n }\n if (storedObject && storedObject.throughput) {\n this.options_.throughput = storedObject.throughput;\n this.tech_.trigger({\n type: 'usage',\n name: 'vhs-throughput-from-local-storage'\n });\n }\n }\n } // if bandwidth was not set by options or pulled from local storage, start playlist\n // selection at a reasonable bandwidth\n\n if (typeof this.options_.bandwidth !== 'number') {\n this.options_.bandwidth = Config.INITIAL_BANDWIDTH;\n } // If the bandwidth number is unchanged from the initial setting\n // then this takes precedence over the enableLowInitialPlaylist option\n\n this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src\n\n ['withCredentials', 'useDevicePixelRatio', 'limitRenditionByPlayerDimensions', 'bandwidth', 'customTagParsers', 'customTagMappers', 'cacheEncryptionKeys', 'playlistSelector', 'initialPlaylistSelector', 'bufferBasedABR', 'liveRangeSafeTimeDelta', 'llhls', 'useNetworkInformationApi', 'useDtsForTimestampOffset', 'exactManifestTimings', 'leastPixelDiffSelector'].forEach(option => {\n if (typeof this.source_[option] !== 'undefined') {\n this.options_[option] = this.source_[option];\n }\n });\n this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;\n this.useDevicePixelRatio = this.options_.useDevicePixelRatio;\n }\n /**\n * called when player.src gets called, handle a new source\n *\n * @param {Object} src the source object to handle\n */\n\n src(src, type) {\n // do nothing if the src is falsey\n if (!src) {\n return;\n }\n this.setOptions_(); // add main playlist controller options\n\n this.options_.src = expandDataUri(this.source_.src);\n this.options_.tech = this.tech_;\n this.options_.externVhs = Vhs;\n this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update the tech\n\n this.options_.seekTo = time => {\n this.tech_.setCurrentTime(time);\n };\n this.playlistController_ = new PlaylistController(this.options_);\n const playbackWatcherOptions = merge({\n liveRangeSafeTimeDelta: SAFE_TIME_DELTA\n }, this.options_, {\n seekable: () => this.seekable(),\n media: () => this.playlistController_.media(),\n playlistController: this.playlistController_\n });\n this.playbackWatcher_ = new PlaybackWatcher(playbackWatcherOptions);\n this.playlistController_.on('error', () => {\n const player = videojs.players[this.tech_.options_.playerId];\n let error = this.playlistController_.error;\n if (typeof error === 'object' && !error.code) {\n error.code = 3;\n } else if (typeof error === 'string') {\n error = {\n message: error,\n code: 3\n };\n }\n player.error(error);\n });\n const defaultSelector = this.options_.bufferBasedABR ? Vhs.movingAverageBandwidthSelector(0.55) : Vhs.STANDARD_PLAYLIST_SELECTOR; // `this` in selectPlaylist should be the VhsHandler for backwards\n // compatibility with < v2\n\n this.playlistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : defaultSelector.bind(this);\n this.playlistController_.selectInitialPlaylist = Vhs.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2\n\n this.playlists = this.playlistController_.mainPlaylistLoader_;\n this.mediaSource = this.playlistController_.mediaSource; // Proxy assignment of some properties to the main playlist\n // controller. Using a custom property for backwards compatibility\n // with < v2\n\n Object.defineProperties(this, {\n selectPlaylist: {\n get() {\n return this.playlistController_.selectPlaylist;\n },\n set(selectPlaylist) {\n this.playlistController_.selectPlaylist = selectPlaylist.bind(this);\n }\n },\n throughput: {\n get() {\n return this.playlistController_.mainSegmentLoader_.throughput.rate;\n },\n set(throughput) {\n this.playlistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value\n // for the cumulative average\n\n this.playlistController_.mainSegmentLoader_.throughput.count = 1;\n }\n },\n bandwidth: {\n get() {\n let playerBandwidthEst = this.playlistController_.mainSegmentLoader_.bandwidth;\n const networkInformation = window.navigator.connection || window.navigator.mozConnection || window.navigator.webkitConnection;\n const tenMbpsAsBitsPerSecond = 10e6;\n if (this.options_.useNetworkInformationApi && networkInformation) {\n // downlink returns Mbps\n // https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink\n const networkInfoBandwidthEstBitsPerSec = networkInformation.downlink * 1000 * 1000; // downlink maxes out at 10 Mbps. In the event that both networkInformationApi and the player\n // estimate a bandwidth greater than 10 Mbps, use the larger of the two estimates to ensure that\n // high quality streams are not filtered out.\n\n if (networkInfoBandwidthEstBitsPerSec >= tenMbpsAsBitsPerSecond && playerBandwidthEst >= tenMbpsAsBitsPerSecond) {\n playerBandwidthEst = Math.max(playerBandwidthEst, networkInfoBandwidthEstBitsPerSec);\n } else {\n playerBandwidthEst = networkInfoBandwidthEstBitsPerSec;\n }\n }\n return playerBandwidthEst;\n },\n set(bandwidth) {\n this.playlistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter\n // `count` is set to zero that current value of `rate` isn't included\n // in the cumulative average\n\n this.playlistController_.mainSegmentLoader_.throughput = {\n rate: 0,\n count: 0\n };\n }\n },\n /**\n * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n * the entire process after that - decryption, transmuxing, and appending - provided\n * by `throughput`.\n *\n * Since the two process are serial, the overall system bandwidth is given by:\n * sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n */\n systemBandwidth: {\n get() {\n const invBandwidth = 1 / (this.bandwidth || 1);\n let invThroughput;\n if (this.throughput > 0) {\n invThroughput = 1 / this.throughput;\n } else {\n invThroughput = 0;\n }\n const systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n return systemBitrate;\n },\n set() {\n videojs.log.error('The \"systemBandwidth\" property is read-only');\n }\n }\n });\n if (this.options_.bandwidth) {\n this.bandwidth = this.options_.bandwidth;\n }\n if (this.options_.throughput) {\n this.throughput = this.options_.throughput;\n }\n Object.defineProperties(this.stats, {\n bandwidth: {\n get: () => this.bandwidth || 0,\n enumerable: true\n },\n mediaRequests: {\n get: () => this.playlistController_.mediaRequests_() || 0,\n enumerable: true\n },\n mediaRequestsAborted: {\n get: () => this.playlistController_.mediaRequestsAborted_() || 0,\n enumerable: true\n },\n mediaRequestsTimedout: {\n get: () => this.playlistController_.mediaRequestsTimedout_() || 0,\n enumerable: true\n },\n mediaRequestsErrored: {\n get: () => this.playlistController_.mediaRequestsErrored_() || 0,\n enumerable: true\n },\n mediaTransferDuration: {\n get: () => this.playlistController_.mediaTransferDuration_() || 0,\n enumerable: true\n },\n mediaBytesTransferred: {\n get: () => this.playlistController_.mediaBytesTransferred_() || 0,\n enumerable: true\n },\n mediaSecondsLoaded: {\n get: () => this.playlistController_.mediaSecondsLoaded_() || 0,\n enumerable: true\n },\n mediaAppends: {\n get: () => this.playlistController_.mediaAppends_() || 0,\n enumerable: true\n },\n mainAppendsToLoadedData: {\n get: () => this.playlistController_.mainAppendsToLoadedData_() || 0,\n enumerable: true\n },\n audioAppendsToLoadedData: {\n get: () => this.playlistController_.audioAppendsToLoadedData_() || 0,\n enumerable: true\n },\n appendsToLoadedData: {\n get: () => this.playlistController_.appendsToLoadedData_() || 0,\n enumerable: true\n },\n timeToLoadedData: {\n get: () => this.playlistController_.timeToLoadedData_() || 0,\n enumerable: true\n },\n buffered: {\n get: () => timeRangesToArray(this.tech_.buffered()),\n enumerable: true\n },\n currentTime: {\n get: () => this.tech_.currentTime(),\n enumerable: true\n },\n currentSource: {\n get: () => this.tech_.currentSource_,\n enumerable: true\n },\n currentTech: {\n get: () => this.tech_.name_,\n enumerable: true\n },\n duration: {\n get: () => this.tech_.duration(),\n enumerable: true\n },\n main: {\n get: () => this.playlists.main,\n enumerable: true\n },\n playerDimensions: {\n get: () => this.tech_.currentDimensions(),\n enumerable: true\n },\n seekable: {\n get: () => timeRangesToArray(this.tech_.seekable()),\n enumerable: true\n },\n timestamp: {\n get: () => Date.now(),\n enumerable: true\n },\n videoPlaybackQuality: {\n get: () => this.tech_.getVideoPlaybackQuality(),\n enumerable: true\n }\n });\n this.tech_.one('canplay', this.playlistController_.setupFirstPlay.bind(this.playlistController_));\n this.tech_.on('bandwidthupdate', () => {\n if (this.options_.useBandwidthFromLocalStorage) {\n updateVhsLocalStorage({\n bandwidth: this.bandwidth,\n throughput: Math.round(this.throughput)\n });\n }\n });\n this.playlistController_.on('selectedinitialmedia', () => {\n // Add the manual rendition mix-in to VhsHandler\n renditionSelectionMixin(this);\n });\n this.playlistController_.sourceUpdater_.on('createdsourcebuffers', () => {\n this.setupEme_();\n }); // the bandwidth of the primary segment loader is our best\n // estimate of overall bandwidth\n\n this.on(this.playlistController_, 'progress', function () {\n this.tech_.trigger('progress');\n }); // In the live case, we need to ignore the very first `seeking` event since\n // that will be the result of the seek-to-live behavior\n\n this.on(this.playlistController_, 'firstplay', function () {\n this.ignoreNextSeekingEvent_ = true;\n });\n this.setupQualityLevels_(); // do nothing if the tech has been disposed already\n // this can occur if someone sets the src in player.ready(), for instance\n\n if (!this.tech_.el()) {\n return;\n }\n this.mediaSourceUrl_ = window.URL.createObjectURL(this.playlistController_.mediaSource);\n this.tech_.src(this.mediaSourceUrl_);\n }\n createKeySessions_() {\n const audioPlaylistLoader = this.playlistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n this.logger_('waiting for EME key session creation');\n waitForKeySessionCreation({\n player: this.player_,\n sourceKeySystems: this.source_.keySystems,\n audioMedia: audioPlaylistLoader && audioPlaylistLoader.media(),\n mainPlaylists: this.playlists.main.playlists\n }).then(() => {\n this.logger_('created EME key session');\n this.playlistController_.sourceUpdater_.initializedEme();\n }).catch(err => {\n this.logger_('error while creating EME key session', err);\n this.player_.error({\n message: 'Failed to initialize media keys for EME',\n code: 3\n });\n });\n }\n handleWaitingForKey_() {\n // If waitingforkey is fired, it's possible that the data that's necessary to retrieve\n // the key is in the manifest. While this should've happened on initial source load, it\n // may happen again in live streams where the keys change, and the manifest info\n // reflects the update.\n //\n // Because videojs-contrib-eme compares the PSSH data we send to that of PSSH data it's\n // already requested keys for, we don't have to worry about this generating extraneous\n // requests.\n this.logger_('waitingforkey fired, attempting to create any new key sessions');\n this.createKeySessions_();\n }\n /**\n * If necessary and EME is available, sets up EME options and waits for key session\n * creation.\n *\n * This function also updates the source updater so taht it can be used, as for some\n * browsers, EME must be configured before content is appended (if appending unencrypted\n * content before encrypted content).\n */\n\n setupEme_() {\n const audioPlaylistLoader = this.playlistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n const didSetupEmeOptions = setupEmeOptions({\n player: this.player_,\n sourceKeySystems: this.source_.keySystems,\n media: this.playlists.media(),\n audioMedia: audioPlaylistLoader && audioPlaylistLoader.media()\n });\n this.player_.tech_.on('keystatuschange', e => {\n if (e.status !== 'output-restricted') {\n return;\n }\n const mainPlaylist = this.playlistController_.main();\n if (!mainPlaylist || !mainPlaylist.playlists) {\n return;\n }\n const excludedHDPlaylists = []; // Assume all HD streams are unplayable and exclude them from ABR selection\n\n mainPlaylist.playlists.forEach(playlist => {\n if (playlist && playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height >= 720) {\n if (!playlist.excludeUntil || playlist.excludeUntil < Infinity) {\n playlist.excludeUntil = Infinity;\n excludedHDPlaylists.push(playlist);\n }\n }\n });\n if (excludedHDPlaylists.length) {\n videojs.log.warn('DRM keystatus changed to \"output-restricted.\" Removing the following HD playlists ' + 'that will most likely fail to play and clearing the buffer. ' + 'This may be due to HDCP restrictions on the stream and the capabilities of the current device.', ...excludedHDPlaylists); // Clear the buffer before switching playlists, since it may already contain unplayable segments\n\n this.playlistController_.fastQualityChange_();\n }\n });\n this.handleWaitingForKey_ = this.handleWaitingForKey_.bind(this);\n this.player_.tech_.on('waitingforkey', this.handleWaitingForKey_); // In IE11 this is too early to initialize media keys, and IE11 does not support\n // promises.\n\n if (videojs.browser.IE_VERSION === 11 || !didSetupEmeOptions) {\n // If EME options were not set up, we've done all we could to initialize EME.\n this.playlistController_.sourceUpdater_.initializedEme();\n return;\n }\n this.createKeySessions_();\n }\n /**\n * Initializes the quality levels and sets listeners to update them.\n *\n * @method setupQualityLevels_\n * @private\n */\n\n setupQualityLevels_() {\n const player = videojs.players[this.tech_.options_.playerId]; // if there isn't a player or there isn't a qualityLevels plugin\n // or qualityLevels_ listeners have already been setup, do nothing.\n\n if (!player || !player.qualityLevels || this.qualityLevels_) {\n return;\n }\n this.qualityLevels_ = player.qualityLevels();\n this.playlistController_.on('selectedinitialmedia', () => {\n handleVhsLoadedMetadata(this.qualityLevels_, this);\n });\n this.playlists.on('mediachange', () => {\n handleVhsMediaChange(this.qualityLevels_, this.playlists);\n });\n }\n /**\n * return the version\n */\n\n static version() {\n return {\n '@videojs/http-streaming': version$4,\n 'mux.js': version$3,\n 'mpd-parser': version$2,\n 'm3u8-parser': version$1,\n 'aes-decrypter': version\n };\n }\n /**\n * return the version\n */\n\n version() {\n return this.constructor.version();\n }\n canChangeType() {\n return SourceUpdater.canChangeType();\n }\n /**\n * Begin playing the video.\n */\n\n play() {\n this.playlistController_.play();\n }\n /**\n * a wrapper around the function in PlaylistController\n */\n\n setCurrentTime(currentTime) {\n this.playlistController_.setCurrentTime(currentTime);\n }\n /**\n * a wrapper around the function in PlaylistController\n */\n\n duration() {\n return this.playlistController_.duration();\n }\n /**\n * a wrapper around the function in PlaylistController\n */\n\n seekable() {\n return this.playlistController_.seekable();\n }\n /**\n * Abort all outstanding work and cleanup.\n */\n\n dispose() {\n if (this.playbackWatcher_) {\n this.playbackWatcher_.dispose();\n }\n if (this.playlistController_) {\n this.playlistController_.dispose();\n }\n if (this.qualityLevels_) {\n this.qualityLevels_.dispose();\n }\n if (this.tech_ && this.tech_.vhs) {\n delete this.tech_.vhs;\n }\n if (this.mediaSourceUrl_ && window.URL.revokeObjectURL) {\n window.URL.revokeObjectURL(this.mediaSourceUrl_);\n this.mediaSourceUrl_ = null;\n }\n if (this.tech_) {\n this.tech_.off('waitingforkey', this.handleWaitingForKey_);\n }\n super.dispose();\n }\n convertToProgramTime(time, callback) {\n return getProgramTime({\n playlist: this.playlistController_.media(),\n time,\n callback\n });\n } // the player must be playing before calling this\n\n seekToProgramTime(programTime, callback, pauseAfterSeek = true, retryCount = 2) {\n return seekToProgramTime({\n programTime,\n playlist: this.playlistController_.media(),\n retryCount,\n pauseAfterSeek,\n seekTo: this.options_.seekTo,\n tech: this.options_.tech,\n callback\n });\n }\n }\n /**\n * The Source Handler object, which informs video.js what additional\n * MIME types are supported and sets up playback. It is registered\n * automatically to the appropriate tech based on the capabilities of\n * the browser it is running in. It is not necessary to use or modify\n * this object in normal usage.\n */\n\n const VhsSourceHandler = {\n name: 'videojs-http-streaming',\n VERSION: version$4,\n canHandleSource(srcObj, options = {}) {\n const localOptions = merge(videojs.options, options);\n return VhsSourceHandler.canPlayType(srcObj.type, localOptions);\n },\n handleSource(source, tech, options = {}) {\n const localOptions = merge(videojs.options, options);\n tech.vhs = new VhsHandler(source, tech, localOptions);\n tech.vhs.xhr = xhrFactory();\n tech.vhs.src(source.src, source.type);\n return tech.vhs;\n },\n canPlayType(type, options) {\n const simpleType = simpleTypeFromSourceType(type);\n if (!simpleType) {\n return '';\n }\n const overrideNative = VhsSourceHandler.getOverrideNative(options);\n const supportsTypeNatively = Vhs.supportsTypeNatively(simpleType);\n const canUseMsePlayback = !supportsTypeNatively || overrideNative;\n return canUseMsePlayback ? 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