/** * videojs-contrib-hls * @version 5.5.0 * @copyright 2017 Brightcove, Inc * @license Apache-2.0 */ (function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.videojsContribHls = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o= cue.adStartTime && mediaTime <= cue.adEndTime) { return cue; } } return null; }; var updateAdCues = function updateAdCues(media, track) { var offset = arguments.length <= 2 || arguments[2] === undefined ? 0 : arguments[2]; if (!media.segments) { return; } var mediaTime = offset; var cue = undefined; for (var i = 0; i < media.segments.length; i++) { var segment = media.segments[i]; if (!cue) { // Since the cues will span for at least the segment duration, adding a fudge // factor of half segment duration will prevent duplicate cues from being // created when timing info is not exact (e.g. cue start time initialized // at 10.006677, but next call mediaTime is 10.003332 ) cue = findAdCue(track, mediaTime + segment.duration / 2); } if (cue) { if ('cueIn' in segment) { // Found a CUE-IN so end the cue cue.endTime = mediaTime; cue.adEndTime = mediaTime; mediaTime += segment.duration; cue = null; continue; } if (mediaTime < cue.endTime) { // Already processed this mediaTime for this cue mediaTime += segment.duration; continue; } // otherwise extend cue until a CUE-IN is found cue.endTime += segment.duration; } else { if ('cueOut' in segment) { cue = new _globalWindow2['default'].VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut); cue.adStartTime = mediaTime; // Assumes tag format to be // #EXT-X-CUE-OUT:30 cue.adEndTime = mediaTime + parseFloat(segment.cueOut); track.addCue(cue); } if ('cueOutCont' in segment) { // Entered into the middle of an ad cue var adOffset = undefined; var adTotal = undefined; // Assumes tag formate to be // #EXT-X-CUE-OUT-CONT:10/30 var _segment$cueOutCont$split$map = segment.cueOutCont.split('/').map(parseFloat); var _segment$cueOutCont$split$map2 = _slicedToArray(_segment$cueOutCont$split$map, 2); adOffset = _segment$cueOutCont$split$map2[0]; adTotal = _segment$cueOutCont$split$map2[1]; cue = new _globalWindow2['default'].VTTCue(mediaTime, mediaTime + segment.duration, ''); cue.adStartTime = mediaTime - adOffset; cue.adEndTime = cue.adStartTime + adTotal; track.addCue(cue); } } mediaTime += segment.duration; } }; exports['default'] = { updateAdCues: updateAdCues, findAdCue: findAdCue }; module.exports = exports['default']; },{"global/window":30}],2:[function(require,module,exports){ /** * @file bin-utils.js */ /** * convert a TimeRange to text * * @param {TimeRange} range the timerange to use for conversion * @param {Number} i the iterator on the range to convert */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var textRange = function textRange(range, i) { return range.start(i) + '-' + range.end(i); }; /** * format a number as hex string * * @param {Number} e The number * @param {Number} i the iterator */ var formatHexString = function formatHexString(e, i) { var value = e.toString(16); return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : ''); }; var formatAsciiString = function formatAsciiString(e) { if (e >= 0x20 && e < 0x7e) { return String.fromCharCode(e); } return '.'; }; /** * Creates an object for sending to a web worker modifying properties that are TypedArrays * into a new object with seperated properties for the buffer, byteOffset, and byteLength. * * @param {Object} message * Object of properties and values to send to the web worker * @return {Object} * Modified message with TypedArray values expanded * @function createTransferableMessage */ var createTransferableMessage = function createTransferableMessage(message) { var transferable = {}; Object.keys(message).forEach(function (key) { var value = message[key]; if (ArrayBuffer.isView(value)) { transferable[key] = { bytes: value.buffer, byteOffset: value.byteOffset, byteLength: value.byteLength }; } else { transferable[key] = value; } }); return transferable; }; /** * Returns a unique string identifier for a media initialization * segment. */ var initSegmentId = function initSegmentId(initSegment) { var byterange = initSegment.byterange || { length: Infinity, offset: 0 }; return [byterange.length, byterange.offset, initSegment.resolvedUri].join(','); }; /** * utils to help dump binary data to the console */ var utils = { hexDump: function hexDump(data) { var bytes = Array.prototype.slice.call(data); var step = 16; var result = ''; var hex = undefined; var ascii = undefined; for (var j = 0; j < bytes.length / step; j++) { hex = bytes.slice(j * step, j * step + step).map(formatHexString).join(''); ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join(''); result += hex + ' ' + ascii + '\n'; } return result; }, tagDump: function tagDump(tag) { return utils.hexDump(tag.bytes); }, textRanges: function textRanges(ranges) { var result = ''; var i = undefined; for (i = 0; i < ranges.length; i++) { result += textRange(ranges, i) + ' '; } return result; }, createTransferableMessage: createTransferableMessage, initSegmentId: initSegmentId }; exports['default'] = utils; module.exports = exports['default']; },{}],3:[function(require,module,exports){ "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports["default"] = { GOAL_BUFFER_LENGTH: 30 }; module.exports = exports["default"]; },{}],4:[function(require,module,exports){ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _aesDecrypter = require('aes-decrypter'); var _binUtils = require('./bin-utils'); /** * Our web worker interface so that things can talk to aes-decrypter * that will be running in a web worker. the scope is passed to this by * webworkify. * * @param {Object} self * the scope for the web worker */ var DecrypterWorker = function DecrypterWorker(self) { self.onmessage = function (event) { var data = event.data; var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength); var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4); var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4); /* eslint-disable no-new, handle-callback-err */ new _aesDecrypter.Decrypter(encrypted, key, iv, function (err, bytes) { _globalWindow2['default'].postMessage((0, _binUtils.createTransferableMessage)({ source: data.source, decrypted: bytes }), [bytes.buffer]); }); /* eslint-enable */ }; }; exports['default'] = function (self) { return new DecrypterWorker(self); }; module.exports = exports['default']; },{"./bin-utils":2,"aes-decrypter":23,"global/window":30}],5:[function(require,module,exports){ (function (global){ /** * @file master-playlist-controller.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x2, _x3, _x4) { var _again = true; _function: while (_again) { var object = _x2, property = _x3, receiver = _x4; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x2 = parent; _x3 = property; _x4 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _playlistLoader = require('./playlist-loader'); var _playlistLoader2 = _interopRequireDefault(_playlistLoader); var _segmentLoader = require('./segment-loader'); var _segmentLoader2 = _interopRequireDefault(_segmentLoader); var _vttSegmentLoader = require('./vtt-segment-loader'); var _vttSegmentLoader2 = _interopRequireDefault(_vttSegmentLoader); var _ranges = require('./ranges'); var _ranges2 = _interopRequireDefault(_ranges); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _adCueTags = require('./ad-cue-tags'); var _adCueTags2 = _interopRequireDefault(_adCueTags); var _syncController = require('./sync-controller'); var _syncController2 = _interopRequireDefault(_syncController); var _videojsContribMediaSourcesEs5CodecUtils = require('videojs-contrib-media-sources/es5/codec-utils'); var _webworkify = require('webworkify'); var _webworkify2 = _interopRequireDefault(_webworkify); var _decrypterWorker = require('./decrypter-worker'); var _decrypterWorker2 = _interopRequireDefault(_decrypterWorker); var Hls = undefined; // SegmentLoader stats that need to have each loader's // values summed to calculate the final value var loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred']; var sumLoaderStat = function sumLoaderStat(stat) { return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat]; }; /** * determine if an object a is differnt from * and object b. both only having one dimensional * properties * * @param {Object} a object one * @param {Object} b object two * @return {Boolean} if the object has changed or not */ var objectChanged = function objectChanged(a, b) { if (typeof a !== typeof b) { return true; } // if we have a different number of elements // something has changed if (Object.keys(a).length !== Object.keys(b).length) { return true; } for (var prop in a) { if (a[prop] !== b[prop]) { return true; } } return false; }; /** * Parses a codec string to retrieve the number of codecs specified, * the video codec and object type indicator, and the audio profile. * * @private */ var parseCodecs = function parseCodecs(codecs) { var result = { codecCount: 0, videoCodec: null, videoObjectTypeIndicator: null, audioProfile: null }; var parsed = undefined; result.codecCount = codecs.split(',').length; result.codecCount = result.codecCount || 2; // parse the video codec parsed = /(^|\s|,)+(avc1)([^ ,]*)/i.exec(codecs); if (parsed) { result.videoCodec = parsed[2]; result.videoObjectTypeIndicator = parsed[3]; } // parse the last field of the audio codec result.audioProfile = /(^|\s|,)+mp4a.[0-9A-Fa-f]+\.([0-9A-Fa-f]+)/i.exec(codecs); result.audioProfile = result.audioProfile && result.audioProfile[2]; return result; }; /** * Replace codecs in the codec string with the old apple-style `avc1.
.
` to the * standard `avc1.`. * * @param codecString {String} the codec string * @return {String} the codec string with old apple-style codecs replaced * * @private */ var mapLegacyAvcCodecs_ = function mapLegacyAvcCodecs_(codecString) { return codecString.replace(/avc1\.(\d+)\.(\d+)/i, function (match) { return (0, _videojsContribMediaSourcesEs5CodecUtils.translateLegacyCodecs)([match])[0]; }); }; exports.mapLegacyAvcCodecs_ = mapLegacyAvcCodecs_; /** * Calculates the MIME type strings for a working configuration of * SourceBuffers to play variant streams in a master playlist. If * there is no possible working configuration, an empty array will be * returned. * * @param master {Object} the m3u8 object for the master playlist * @param media {Object} the m3u8 object for the variant playlist * @return {Array} the MIME type strings. If the array has more than * one entry, the first element should be applied to the video * SourceBuffer and the second to the audio SourceBuffer. * * @private */ var mimeTypesForPlaylist_ = function mimeTypesForPlaylist_(master, media) { var container = 'mp2t'; var codecs = { videoCodec: 'avc1', videoObjectTypeIndicator: '.4d400d', audioProfile: '2' }; var audioGroup = []; var mediaAttributes = undefined; var previousGroup = null; if (!media) { // not enough information, return an error return []; } // An initialization segment means the media playlists is an iframe // playlist or is using the mp4 container. We don't currently // support iframe playlists, so assume this is signalling mp4 // fragments. // the existence check for segments can be removed once // https://github.com/videojs/m3u8-parser/issues/8 is closed if (media.segments && media.segments.length && media.segments[0].map) { container = 'mp4'; } // if the codecs were explicitly specified, use them instead of the // defaults mediaAttributes = media.attributes || {}; if (mediaAttributes.CODECS) { (function () { var parsedCodecs = parseCodecs(mediaAttributes.CODECS); Object.keys(parsedCodecs).forEach(function (key) { codecs[key] = parsedCodecs[key] || codecs[key]; }); })(); } if (master.mediaGroups.AUDIO) { audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO]; } // if audio could be muxed or unmuxed, use mime types appropriate // for both scenarios for (var groupId in audioGroup) { if (previousGroup && !!audioGroup[groupId].uri !== !!previousGroup.uri) { // one source buffer with muxed video and audio and another for // the alternate audio return ['video/' + container + '; codecs="' + codecs.videoCodec + codecs.videoObjectTypeIndicator + ', mp4a.40.' + codecs.audioProfile + '"', 'audio/' + container + '; codecs="mp4a.40.' + codecs.audioProfile + '"']; } previousGroup = audioGroup[groupId]; } // if all video and audio is unmuxed, use two single-codec mime // types if (previousGroup && previousGroup.uri) { return ['video/' + container + '; codecs="' + codecs.videoCodec + codecs.videoObjectTypeIndicator + '"', 'audio/' + container + '; codecs="mp4a.40.' + codecs.audioProfile + '"']; } // all video and audio are muxed, use a dual-codec mime type return ['video/' + container + '; codecs="' + codecs.videoCodec + codecs.videoObjectTypeIndicator + ', mp4a.40.' + codecs.audioProfile + '"']; }; exports.mimeTypesForPlaylist_ = mimeTypesForPlaylist_; /** * the master playlist controller controller all interactons * between playlists and segmentloaders. At this time this mainly * involves a master playlist and a series of audio playlists * if they are available * * @class MasterPlaylistController * @extends videojs.EventTarget */ var MasterPlaylistController = (function (_videojs$EventTarget) { _inherits(MasterPlaylistController, _videojs$EventTarget); function MasterPlaylistController(options) { var _this = this; _classCallCheck(this, MasterPlaylistController); _get(Object.getPrototypeOf(MasterPlaylistController.prototype), 'constructor', this).call(this); var url = options.url; var withCredentials = options.withCredentials; var mode = options.mode; var tech = options.tech; var bandwidth = options.bandwidth; var externHls = options.externHls; var useCueTags = options.useCueTags; var blacklistDuration = options.blacklistDuration; if (!url) { throw new Error('A non-empty playlist URL is required'); } Hls = externHls; this.withCredentials = withCredentials; this.tech_ = tech; this.hls_ = tech.hls; this.mode_ = mode; this.useCueTags_ = useCueTags; this.blacklistDuration = blacklistDuration; if (this.useCueTags_) { this.cueTagsTrack_ = this.tech_.addTextTrack('metadata', 'ad-cues'); this.cueTagsTrack_.inBandMetadataTrackDispatchType = ''; } this.requestOptions_ = { withCredentials: this.withCredentials, timeout: null }; this.audioGroups_ = {}; this.subtitleGroups_ = { groups: {}, tracks: {} }; this.mediaSource = new _videoJs2['default'].MediaSource({ mode: mode }); this.audioinfo_ = null; this.mediaSource.on('audioinfo', this.handleAudioinfoUpdate_.bind(this)); // load the media source into the player this.mediaSource.addEventListener('sourceopen', this.handleSourceOpen_.bind(this)); this.seekable_ = _videoJs2['default'].createTimeRanges(); this.hasPlayed_ = function () { return false; }; this.syncController_ = new _syncController2['default'](); this.segmentMetadataTrack_ = tech.addRemoteTextTrack({ kind: 'metadata', label: 'segment-metadata' }, true).track; this.decrypter_ = (0, _webworkify2['default'])(_decrypterWorker2['default']); var segmentLoaderOptions = { hls: this.hls_, mediaSource: this.mediaSource, currentTime: this.tech_.currentTime.bind(this.tech_), seekable: function seekable() { return _this.seekable(); }, seeking: function seeking() { return _this.tech_.seeking(); }, duration: function duration() { return _this.mediaSource.duration; }, hasPlayed: function hasPlayed() { return _this.hasPlayed_(); }, bandwidth: bandwidth, syncController: this.syncController_, decrypter: this.decrypter_ }; // setup playlist loaders this.masterPlaylistLoader_ = new _playlistLoader2['default'](url, this.hls_, this.withCredentials); this.setupMasterPlaylistLoaderListeners_(); this.audioPlaylistLoader_ = null; this.subtitlePlaylistLoader_ = null; // setup segment loaders // combined audio/video or just video when alternate audio track is selected this.mainSegmentLoader_ = new _segmentLoader2['default'](_videoJs2['default'].mergeOptions(segmentLoaderOptions, { segmentMetadataTrack: this.segmentMetadataTrack_, loaderType: 'main' })); // alternate audio track this.audioSegmentLoader_ = new _segmentLoader2['default'](_videoJs2['default'].mergeOptions(segmentLoaderOptions, { loaderType: 'audio' })); this.subtitleSegmentLoader_ = new _vttSegmentLoader2['default'](_videoJs2['default'].mergeOptions(segmentLoaderOptions, { loaderType: 'vtt' })); this.setupSegmentLoaderListeners_(); // Create SegmentLoader stat-getters loaderStats.forEach(function (stat) { _this[stat + '_'] = sumLoaderStat.bind(_this, stat); }); this.masterPlaylistLoader_.load(); } /** * Register event handlers on the master playlist loader. A helper * function for construction time. * * @private */ _createClass(MasterPlaylistController, [{ key: 'setupMasterPlaylistLoaderListeners_', value: function setupMasterPlaylistLoaderListeners_() { var _this2 = this; this.masterPlaylistLoader_.on('loadedmetadata', function () { var media = _this2.masterPlaylistLoader_.media(); var requestTimeout = _this2.masterPlaylistLoader_.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to // timeout the request. if (_this2.masterPlaylistLoader_.isLowestEnabledRendition_()) { _this2.requestOptions_.timeout = 0; } else { _this2.requestOptions_.timeout = requestTimeout; } // if this isn't a live video and preload permits, start // downloading segments if (media.endList && _this2.tech_.preload() !== 'none') { _this2.mainSegmentLoader_.playlist(media, _this2.requestOptions_); _this2.mainSegmentLoader_.load(); } _this2.fillAudioTracks_(); _this2.setupAudio(); _this2.fillSubtitleTracks_(); _this2.setupSubtitles(); try { _this2.setupSourceBuffers_(); } catch (e) { _videoJs2['default'].log.warn('Failed to create SourceBuffers', e); return _this2.mediaSource.endOfStream('decode'); } _this2.setupFirstPlay(); _this2.trigger('audioupdate'); _this2.trigger('selectedinitialmedia'); }); this.masterPlaylistLoader_.on('loadedplaylist', function () { var updatedPlaylist = _this2.masterPlaylistLoader_.media(); if (!updatedPlaylist) { // select the initial variant _this2.initialMedia_ = _this2.selectPlaylist(); _this2.masterPlaylistLoader_.media(_this2.initialMedia_); return; } if (_this2.useCueTags_) { _this2.updateAdCues_(updatedPlaylist); } // TODO: Create a new event on the PlaylistLoader that signals // that the segments have changed in some way and use that to // update the SegmentLoader instead of doing it twice here and // on `mediachange` _this2.mainSegmentLoader_.playlist(updatedPlaylist, _this2.requestOptions_); _this2.updateDuration(); // If the player isn't paused, ensure that the segment loader is running, // as it is possible that it was temporarily stopped while waiting for // a playlist (e.g., in case the playlist errored and we re-requested it). if (!_this2.tech_.paused()) { _this2.mainSegmentLoader_.load(); } if (!updatedPlaylist.endList) { (function () { var addSeekableRange = function addSeekableRange() { var seekable = _this2.seekable(); if (seekable.length !== 0) { _this2.mediaSource.addSeekableRange_(seekable.start(0), seekable.end(0)); } }; if (_this2.duration() !== Infinity) { (function () { var onDurationchange = function onDurationchange() { if (_this2.duration() === Infinity) { addSeekableRange(); } else { _this2.tech_.one('durationchange', onDurationchange); } }; _this2.tech_.one('durationchange', onDurationchange); })(); } else { addSeekableRange(); } })(); } }); this.masterPlaylistLoader_.on('error', function () { _this2.blacklistCurrentPlaylist(_this2.masterPlaylistLoader_.error); }); this.masterPlaylistLoader_.on('mediachanging', function () { _this2.mainSegmentLoader_.abort(); _this2.mainSegmentLoader_.pause(); }); this.masterPlaylistLoader_.on('mediachange', function () { var media = _this2.masterPlaylistLoader_.media(); var requestTimeout = _this2.masterPlaylistLoader_.targetDuration * 1.5 * 1000; var activeAudioGroup = undefined; var activeTrack = undefined; // If we don't have any more available playlists, we don't want to // timeout the request. if (_this2.masterPlaylistLoader_.isLowestEnabledRendition_()) { _this2.requestOptions_.timeout = 0; } else { _this2.requestOptions_.timeout = requestTimeout; } // TODO: Create a new event on the PlaylistLoader that signals // that the segments have changed in some way and use that to // update the SegmentLoader instead of doing it twice here and // on `loadedplaylist` _this2.mainSegmentLoader_.playlist(media, _this2.requestOptions_); _this2.mainSegmentLoader_.load(); // if the audio group has changed, a new audio track has to be // enabled activeAudioGroup = _this2.activeAudioGroup(); activeTrack = activeAudioGroup.filter(function (track) { return track.enabled; })[0]; if (!activeTrack) { _this2.setupAudio(); _this2.trigger('audioupdate'); } _this2.setupSubtitles(); _this2.tech_.trigger({ type: 'mediachange', bubbles: true }); }); this.masterPlaylistLoader_.on('playlistunchanged', function () { var updatedPlaylist = _this2.masterPlaylistLoader_.media(); var playlistOutdated = _this2.stuckAtPlaylistEnd_(updatedPlaylist); if (playlistOutdated) { // Playlist has stopped updating and we're stuck at its end. Try to // blacklist it and switch to another playlist in the hope that that // one is updating (and give the player a chance to re-adjust to the // safe live point). _this2.blacklistCurrentPlaylist({ message: 'Playlist no longer updating.' }); // useful for monitoring QoS _this2.tech_.trigger('playliststuck'); } }); } /** * Register event handlers on the segment loaders. A helper function * for construction time. * * @private */ }, { key: 'setupSegmentLoaderListeners_', value: function setupSegmentLoaderListeners_() { var _this3 = this; this.mainSegmentLoader_.on('bandwidthupdate', function () { // figure out what stream the next segment should be downloaded from // with the updated bandwidth information _this3.masterPlaylistLoader_.media(_this3.selectPlaylist()); }); this.mainSegmentLoader_.on('progress', function () { _this3.trigger('progress'); }); this.mainSegmentLoader_.on('error', function () { _this3.blacklistCurrentPlaylist(_this3.mainSegmentLoader_.error()); }); this.mainSegmentLoader_.on('syncinfoupdate', function () { _this3.onSyncInfoUpdate_(); }); this.audioSegmentLoader_.on('syncinfoupdate', function () { _this3.onSyncInfoUpdate_(); }); this.audioSegmentLoader_.on('error', function () { _videoJs2['default'].log.warn('Problem encountered with the current alternate audio track' + '. Switching back to default.'); _this3.audioSegmentLoader_.abort(); _this3.audioPlaylistLoader_ = null; _this3.setupAudio(); }); this.subtitleSegmentLoader_.on('error', this.handleSubtitleError_.bind(this)); } }, { key: 'handleAudioinfoUpdate_', value: function handleAudioinfoUpdate_(event) { if (Hls.supportsAudioInfoChange_() || !this.audioInfo_ || !objectChanged(this.audioInfo_, event.info)) { this.audioInfo_ = event.info; return; } var error = 'had different audio properties (channels, sample rate, etc.) ' + 'or changed in some other way. This behavior is currently ' + 'unsupported in Firefox 48 and below due to an issue: \n\n' + 'https://bugzilla.mozilla.org/show_bug.cgi?id=1247138\n\n'; var enabledIndex = this.activeAudioGroup().map(function (track) { return track.enabled; }).indexOf(true); var enabledTrack = this.activeAudioGroup()[enabledIndex]; var defaultTrack = this.activeAudioGroup().filter(function (track) { return track.properties_ && track.properties_['default']; })[0]; // they did not switch audiotracks // blacklist the current playlist if (!this.audioPlaylistLoader_) { error = 'The rendition that we tried to switch to ' + error + 'Unfortunately that means we will have to blacklist ' + 'the current playlist and switch to another. Sorry!'; this.blacklistCurrentPlaylist(); } else { error = 'The audio track \'' + enabledTrack.label + '\' that we tried to ' + ('switch to ' + error + ' Unfortunately this means we will have to ') + ('return you to the main track \'' + defaultTrack.label + '\'. Sorry!'); defaultTrack.enabled = true; this.activeAudioGroup().splice(enabledIndex, 1); this.trigger('audioupdate'); } _videoJs2['default'].log.warn(error); this.setupAudio(); } }, { key: 'mediaSecondsLoaded_', value: function mediaSecondsLoaded_() { return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded); } /** * fill our internal list of HlsAudioTracks with data from * the master playlist or use a default * * @private */ }, { key: 'fillAudioTracks_', value: function fillAudioTracks_() { var master = this.master(); var mediaGroups = master.mediaGroups || {}; // force a default if we have none or we are not // in html5 mode (the only mode to support more than one // audio track) if (!mediaGroups || !mediaGroups.AUDIO || Object.keys(mediaGroups.AUDIO).length === 0 || this.mode_ !== 'html5') { // "main" audio group, track name "default" mediaGroups.AUDIO = { main: { 'default': { 'default': true } } }; } for (var mediaGroup in mediaGroups.AUDIO) { if (!this.audioGroups_[mediaGroup]) { this.audioGroups_[mediaGroup] = []; } for (var label in mediaGroups.AUDIO[mediaGroup]) { var properties = mediaGroups.AUDIO[mediaGroup][label]; var track = new _videoJs2['default'].AudioTrack({ id: label, kind: this.audioTrackKind_(properties), enabled: false, language: properties.language, label: label }); track.properties_ = properties; this.audioGroups_[mediaGroup].push(track); } } // enable the default active track (this.activeAudioGroup().filter(function (audioTrack) { return audioTrack.properties_['default']; })[0] || this.activeAudioGroup()[0]).enabled = true; } /** * Convert the properties of an HLS track into an audioTrackKind. * * @private */ }, { key: 'audioTrackKind_', value: function audioTrackKind_(properties) { var kind = properties['default'] ? 'main' : 'alternative'; if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) { kind = 'main-desc'; } return kind; } /** * fill our internal list of Subtitle Tracks with data from * the master playlist or use a default * * @private */ }, { key: 'fillSubtitleTracks_', value: function fillSubtitleTracks_() { var master = this.master(); var mediaGroups = master.mediaGroups || {}; for (var mediaGroup in mediaGroups.SUBTITLES) { if (!this.subtitleGroups_.groups[mediaGroup]) { this.subtitleGroups_.groups[mediaGroup] = []; } for (var label in mediaGroups.SUBTITLES[mediaGroup]) { var properties = mediaGroups.SUBTITLES[mediaGroup][label]; if (!properties.forced) { this.subtitleGroups_.groups[mediaGroup].push(_videoJs2['default'].mergeOptions({ id: label }, properties)); if (typeof this.subtitleGroups_.tracks[label] === 'undefined') { var track = this.tech_.addRemoteTextTrack({ id: label, kind: 'subtitles', enabled: false, language: properties.language, label: label }, true).track; this.subtitleGroups_.tracks[label] = track; } } } } // Do not enable a default subtitle track. Wait for user interaction instead. } /** * Call load on our SegmentLoaders */ }, { key: 'load', value: function load() { this.mainSegmentLoader_.load(); if (this.audioPlaylistLoader_) { this.audioSegmentLoader_.load(); } if (this.subtitlePlaylistLoader_) { this.subtitleSegmentLoader_.load(); } } /** * Returns the audio group for the currently active primary * media playlist. */ }, { key: 'activeAudioGroup', value: function activeAudioGroup() { var videoPlaylist = this.masterPlaylistLoader_.media(); var result = undefined; if (videoPlaylist.attributes && videoPlaylist.attributes.AUDIO) { result = this.audioGroups_[videoPlaylist.attributes.AUDIO]; } return result || this.audioGroups_.main; } /** * Returns the subtitle group for the currently active primary * media playlist. */ }, { key: 'activeSubtitleGroup_', value: function activeSubtitleGroup_() { var videoPlaylist = this.masterPlaylistLoader_.media(); var result = undefined; if (!videoPlaylist) { return null; } if (videoPlaylist.attributes && videoPlaylist.attributes.SUBTITLES) { result = this.subtitleGroups_.groups[videoPlaylist.attributes.SUBTITLES]; } return result || this.subtitleGroups_.groups.main; } }, { key: 'activeSubtitleTrack_', value: function activeSubtitleTrack_() { for (var trackName in this.subtitleGroups_.tracks) { if (this.subtitleGroups_.tracks[trackName].mode === 'showing') { return this.subtitleGroups_.tracks[trackName]; } } return null; } }, { key: 'handleSubtitleError_', value: function handleSubtitleError_() { _videoJs2['default'].log.warn('Problem encountered loading the subtitle track' + '. Switching back to default.'); this.subtitleSegmentLoader_.abort(); var track = this.activeSubtitleTrack_(); if (track) { track.mode = 'disabled'; } this.setupSubtitles(); } /** * Determine the correct audio rendition based on the active * AudioTrack and initialize a PlaylistLoader and SegmentLoader if * necessary. This method is called once automatically before * playback begins to enable the default audio track and should be * invoked again if the track is changed. */ }, { key: 'setupAudio', value: function setupAudio() { var _this4 = this; // determine whether seperate loaders are required for the audio // rendition var audioGroup = this.activeAudioGroup(); var track = audioGroup.filter(function (audioTrack) { return audioTrack.enabled; })[0]; if (!track) { track = audioGroup.filter(function (audioTrack) { return audioTrack.properties_['default']; })[0] || audioGroup[0]; track.enabled = true; } // stop playlist and segment loading for audio if (this.audioPlaylistLoader_) { this.audioPlaylistLoader_.dispose(); this.audioPlaylistLoader_ = null; } this.audioSegmentLoader_.pause(); if (!track.properties_.resolvedUri) { this.mainSegmentLoader_.resetEverything(); return; } this.audioSegmentLoader_.resetEverything(); // startup playlist and segment loaders for the enabled audio // track this.audioPlaylistLoader_ = new _playlistLoader2['default'](track.properties_.resolvedUri, this.hls_, this.withCredentials); this.audioPlaylistLoader_.load(); this.audioPlaylistLoader_.on('loadedmetadata', function () { var audioPlaylist = _this4.audioPlaylistLoader_.media(); _this4.audioSegmentLoader_.playlist(audioPlaylist, _this4.requestOptions_); // if the video is already playing, or if this isn't a live video and preload // permits, start downloading segments if (!_this4.tech_.paused() || audioPlaylist.endList && _this4.tech_.preload() !== 'none') { _this4.audioSegmentLoader_.load(); } if (!audioPlaylist.endList) { _this4.audioPlaylistLoader_.trigger('firstplay'); } }); this.audioPlaylistLoader_.on('loadedplaylist', function () { var updatedPlaylist = undefined; if (_this4.audioPlaylistLoader_) { updatedPlaylist = _this4.audioPlaylistLoader_.media(); } if (!updatedPlaylist) { // only one playlist to select _this4.audioPlaylistLoader_.media(_this4.audioPlaylistLoader_.playlists.master.playlists[0]); return; } _this4.audioSegmentLoader_.playlist(updatedPlaylist, _this4.requestOptions_); }); this.audioPlaylistLoader_.on('error', function () { _videoJs2['default'].log.warn('Problem encountered loading the alternate audio track' + '. Switching back to default.'); _this4.audioSegmentLoader_.abort(); _this4.setupAudio(); }); } /** * Determine the correct subtitle playlist based on the active * SubtitleTrack and initialize a PlaylistLoader and SegmentLoader if * necessary. This method is called once automatically before * playback begins to enable the default subtitle track and should be * invoked again if the track is changed. */ }, { key: 'setupSubtitles', value: function setupSubtitles() { var _this5 = this; var subtitleGroup = this.activeSubtitleGroup_(); var track = this.activeSubtitleTrack_(); this.subtitleSegmentLoader_.pause(); if (!track) { // stop playlist and segment loading for subtitles if (this.subtitlePlaylistLoader_) { this.subtitlePlaylistLoader_.dispose(); this.subtitlePlaylistLoader_ = null; } return; } var properties = subtitleGroup.filter(function (subtitleProperties) { return subtitleProperties.id === track.id; })[0]; // startup playlist and segment loaders for the enabled subtitle track if (!this.subtitlePlaylistLoader_ || // if the media hasn't loaded yet, we don't have the URI to check, so it is // easiest to simply recreate the playlist loader !this.subtitlePlaylistLoader_.media() || this.subtitlePlaylistLoader_.media().resolvedUri !== properties.resolvedUri) { if (this.subtitlePlaylistLoader_) { this.subtitlePlaylistLoader_.dispose(); } // reset the segment loader only when the subtitle playlist is changed instead of // every time setupSubtitles is called since switching subtitle tracks fires // multiple `change` events on the TextTrackList this.subtitleSegmentLoader_.resetEverything(); // can't reuse playlistloader because we're only using single renditions and not a // proper master this.subtitlePlaylistLoader_ = new _playlistLoader2['default'](properties.resolvedUri, this.hls_, this.withCredentials); this.subtitlePlaylistLoader_.on('loadedmetadata', function () { var subtitlePlaylist = _this5.subtitlePlaylistLoader_.media(); _this5.subtitleSegmentLoader_.playlist(subtitlePlaylist, _this5.requestOptions_); _this5.subtitleSegmentLoader_.track(_this5.activeSubtitleTrack_()); // if the video is already playing, or if this isn't a live video and preload // permits, start downloading segments if (!_this5.tech_.paused() || subtitlePlaylist.endList && _this5.tech_.preload() !== 'none') { _this5.subtitleSegmentLoader_.load(); } }); this.subtitlePlaylistLoader_.on('loadedplaylist', function () { var updatedPlaylist = undefined; if (_this5.subtitlePlaylistLoader_) { updatedPlaylist = _this5.subtitlePlaylistLoader_.media(); } if (!updatedPlaylist) { return; } _this5.subtitleSegmentLoader_.playlist(updatedPlaylist, _this5.requestOptions_); }); this.subtitlePlaylistLoader_.on('error', this.handleSubtitleError_.bind(this)); } if (this.subtitlePlaylistLoader_.media() && this.subtitlePlaylistLoader_.media().resolvedUri === properties.resolvedUri) { this.subtitleSegmentLoader_.load(); } else { this.subtitlePlaylistLoader_.load(); } } /** * Re-tune playback quality level for the current player * conditions. This method may perform destructive actions, like * removing already buffered content, to readjust the currently * active playlist quickly. * * @private */ }, { key: 'fastQualityChange_', value: function fastQualityChange_() { var media = this.selectPlaylist(); if (media !== this.masterPlaylistLoader_.media()) { this.masterPlaylistLoader_.media(media); this.mainSegmentLoader_.resetLoader(); // don't need to reset audio as it is reset when media changes } } /** * Begin playback. */ }, { key: 'play', value: function play() { if (this.setupFirstPlay()) { return; } if (this.tech_.ended()) { this.tech_.setCurrentTime(0); } if (this.hasPlayed_()) { this.load(); } var seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window, // seek forward to the live point if (this.tech_.duration() === Infinity) { if (this.tech_.currentTime() < seekable.start(0)) { return this.tech_.setCurrentTime(seekable.end(seekable.length - 1)); } } } /** * Seek to the latest media position if this is a live video and the * player and video are loaded and initialized. */ }, { key: 'setupFirstPlay', value: function setupFirstPlay() { var seekable = undefined; var media = this.masterPlaylistLoader_.media(); // check that everything is ready to begin buffering in the live // scenario // 1) the active media playlist is available if (media && // 2) the player is not paused !this.tech_.paused() && // 3) the player has not started playing !this.hasPlayed_()) { // when the video is a live stream if (!media.endList) { this.trigger('firstplay'); // seek to the latest media position for live videos seekable = this.seekable(); if (seekable.length) { this.tech_.setCurrentTime(seekable.end(0)); } } this.hasPlayed_ = function () { return true; }; // now that we are ready, load the segment this.load(); return true; } return false; } /** * handle the sourceopen event on the MediaSource * * @private */ }, { key: 'handleSourceOpen_', value: function handleSourceOpen_() { // Only attempt to create the source buffer if none already exist. // handleSourceOpen is also called when we are "re-opening" a source buffer // after `endOfStream` has been called (in response to a seek for instance) try { this.setupSourceBuffers_(); } catch (e) { _videoJs2['default'].log.warn('Failed to create Source Buffers', e); return this.mediaSource.endOfStream('decode'); } // if autoplay is enabled, begin playback. This is duplicative of // code in video.js but is required because play() must be invoked // *after* the media source has opened. if (this.tech_.autoplay()) { this.tech_.play(); } this.trigger('sourceopen'); } /** * Check if a playlist has stopped being updated * @param {Object} playlist the media playlist object * @return {boolean} whether the playlist has stopped being updated or not */ }, { key: 'stuckAtPlaylistEnd_', value: function stuckAtPlaylistEnd_(playlist) { var seekable = this.seekable(); if (!seekable.length) { // playlist doesn't have enough information to determine whether we are stuck return false; } // does not use the safe live end to calculate playlist end, since we // don't want to say we are stuck while there is still content var absolutePlaylistEnd = Hls.Playlist.playlistEnd(playlist); var currentTime = this.tech_.currentTime(); var buffered = this.tech_.buffered(); if (!buffered.length) { // return true if the playhead reached the absolute end of the playlist return absolutePlaylistEnd - currentTime <= _ranges2['default'].TIME_FUDGE_FACTOR; } var bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and // buffer has reached absolute end of playlist return bufferedEnd - currentTime <= _ranges2['default'].TIME_FUDGE_FACTOR && absolutePlaylistEnd - bufferedEnd <= _ranges2['default'].TIME_FUDGE_FACTOR; } /** * Blacklists a playlist when an error occurs for a set amount of time * making it unavailable for selection by the rendition selection algorithm * and then forces a new playlist (rendition) selection. * * @param {Object=} error an optional error that may include the playlist * to blacklist */ }, { key: 'blacklistCurrentPlaylist', value: function blacklistCurrentPlaylist() { var error = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0]; var currentPlaylist = undefined; var nextPlaylist = undefined; // If the `error` was generated by the playlist loader, it will contain // the playlist we were trying to load (but failed) and that should be // blacklisted instead of the currently selected playlist which is likely // out-of-date in this scenario currentPlaylist = error.playlist || this.masterPlaylistLoader_.media(); // If there is no current playlist, then an error occurred while we were // trying to load the master OR while we were disposing of the tech if (!currentPlaylist) { this.error = error; try { return this.mediaSource.endOfStream('network'); } catch (e) { return this.trigger('error'); } } var isFinalRendition = this.masterPlaylistLoader_.isFinalRendition_(); if (isFinalRendition) { // Never blacklisting this playlist because it's final rendition _videoJs2['default'].log.warn('Problem encountered with the current ' + 'HLS playlist. Trying again since it is the final playlist.'); this.tech_.trigger('retryplaylist'); return this.masterPlaylistLoader_.load(isFinalRendition); } // Blacklist this playlist currentPlaylist.excludeUntil = Date.now() + this.blacklistDuration * 1000; this.tech_.trigger('blacklistplaylist'); // Select a new playlist nextPlaylist = this.selectPlaylist(); _videoJs2['default'].log.warn('Problem encountered with the current HLS playlist.' + (error.message ? ' ' + error.message : '') + ' Switching to another playlist.'); return this.masterPlaylistLoader_.media(nextPlaylist); } /** * Pause all segment loaders */ }, { key: 'pauseLoading', value: function pauseLoading() { this.mainSegmentLoader_.pause(); if (this.audioPlaylistLoader_) { this.audioSegmentLoader_.pause(); } if (this.subtitlePlaylistLoader_) { this.subtitleSegmentLoader_.pause(); } } /** * set the current time on all segment loaders * * @param {TimeRange} currentTime the current time to set * @return {TimeRange} the current time */ }, { key: 'setCurrentTime', value: function setCurrentTime(currentTime) { var buffered = _ranges2['default'].findRange(this.tech_.buffered(), currentTime); if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) { // return immediately if the metadata is not ready yet return 0; } // it's clearly an edge-case but don't thrown an error if asked to // seek within an empty playlist if (!this.masterPlaylistLoader_.media().segments) { return 0; } // In flash playback, the segment loaders should be reset on every seek, even // in buffer seeks var isFlash = this.mode_ === 'flash' || this.mode_ === 'auto' && !_videoJs2['default'].MediaSource.supportsNativeMediaSources(); // if the seek location is already buffered, continue buffering as // usual if (buffered && buffered.length && !isFlash) { return currentTime; } // cancel outstanding requests so we begin buffering at the new // location this.mainSegmentLoader_.resetEverything(); this.mainSegmentLoader_.abort(); if (this.audioPlaylistLoader_) { this.audioSegmentLoader_.resetEverything(); this.audioSegmentLoader_.abort(); } if (this.subtitlePlaylistLoader_) { this.subtitleSegmentLoader_.resetEverything(); this.subtitleSegmentLoader_.abort(); } if (!this.tech_.paused()) { this.mainSegmentLoader_.load(); if (this.audioPlaylistLoader_) { this.audioSegmentLoader_.load(); } if (this.subtitlePlaylistLoader_) { this.subtitleSegmentLoader_.load(); } } } /** * get the current duration * * @return {TimeRange} the duration */ }, { key: 'duration', value: function duration() { if (!this.masterPlaylistLoader_) { return 0; } if (this.mediaSource) { return this.mediaSource.duration; } return Hls.Playlist.duration(this.masterPlaylistLoader_.media()); } /** * check the seekable range * * @return {TimeRange} the seekable range */ }, { key: 'seekable', value: function seekable() { return this.seekable_; } }, { key: 'onSyncInfoUpdate_', value: function onSyncInfoUpdate_() { var media = undefined; var mainSeekable = undefined; var audioSeekable = undefined; if (!this.masterPlaylistLoader_) { return; } media = this.masterPlaylistLoader_.media(); if (!media) { return; } mainSeekable = Hls.Playlist.seekable(media); if (mainSeekable.length === 0) { return; } if (this.audioPlaylistLoader_) { audioSeekable = Hls.Playlist.seekable(this.audioPlaylistLoader_.media()); if (audioSeekable.length === 0) { return; } } if (!audioSeekable) { // seekable has been calculated based on buffering video data so it // can be returned directly this.seekable_ = mainSeekable; } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) { // seekables are pretty far off, rely on main this.seekable_ = mainSeekable; } else { this.seekable_ = _videoJs2['default'].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)]]); } this.tech_.trigger('seekablechanged'); } /** * Update the player duration */ }, { key: 'updateDuration', value: function updateDuration() { var _this6 = this; var oldDuration = this.mediaSource.duration; var newDuration = Hls.Playlist.duration(this.masterPlaylistLoader_.media()); var buffered = this.tech_.buffered(); var setDuration = function setDuration() { _this6.mediaSource.duration = newDuration; _this6.tech_.trigger('durationchange'); _this6.mediaSource.removeEventListener('sourceopen', setDuration); }; if (buffered.length > 0) { newDuration = Math.max(newDuration, buffered.end(buffered.length - 1)); } // if the duration has changed, invalidate the cached value if (oldDuration !== newDuration) { // update the duration if (this.mediaSource.readyState !== 'open') { this.mediaSource.addEventListener('sourceopen', setDuration); } else { setDuration(); } } } /** * dispose of the MasterPlaylistController and everything * that it controls */ }, { key: 'dispose', value: function dispose() { this.decrypter_.terminate(); this.masterPlaylistLoader_.dispose(); this.mainSegmentLoader_.dispose(); if (this.audioPlaylistLoader_) { this.audioPlaylistLoader_.dispose(); } if (this.subtitlePlaylistLoader_) { this.subtitlePlaylistLoader_.dispose(); } this.audioSegmentLoader_.dispose(); this.subtitleSegmentLoader_.dispose(); } /** * return the master playlist object if we have one * * @return {Object} the master playlist object that we parsed */ }, { key: 'master', value: function master() { return this.masterPlaylistLoader_.master; } /** * return the currently selected playlist * * @return {Object} the currently selected playlist object that we parsed */ }, { key: 'media', value: function media() { // playlist loader will not return media if it has not been fully loaded return this.masterPlaylistLoader_.media() || this.initialMedia_; } /** * setup our internal source buffers on our segment Loaders * * @private */ }, { key: 'setupSourceBuffers_', value: function setupSourceBuffers_() { var media = this.masterPlaylistLoader_.media(); var mimeTypes = undefined; // wait until a media playlist is available and the Media Source is // attached if (!media || this.mediaSource.readyState !== 'open') { return; } mimeTypes = mimeTypesForPlaylist_(this.masterPlaylistLoader_.master, media); if (mimeTypes.length < 1) { this.error = 'No compatible SourceBuffer configuration for the variant stream:' + media.resolvedUri; return this.mediaSource.endOfStream('decode'); } this.mainSegmentLoader_.mimeType(mimeTypes[0]); if (mimeTypes[1]) { this.audioSegmentLoader_.mimeType(mimeTypes[1]); } // exclude any incompatible variant streams from future playlist // selection this.excludeIncompatibleVariants_(media); } /** * Blacklist playlists that are known to be codec or * stream-incompatible with the SourceBuffer configuration. For * instance, Media Source Extensions would cause the video element to * stall waiting for video data if you switched from a variant with * video and audio to an audio-only one. * * @param {Object} media a media playlist compatible with the current * set of SourceBuffers. Variants in the current master playlist that * do not appear to have compatible codec or stream configurations * will be excluded from the default playlist selection algorithm * indefinitely. * @private */ }, { key: 'excludeIncompatibleVariants_', value: function excludeIncompatibleVariants_(media) { var master = this.masterPlaylistLoader_.master; var codecCount = 2; var videoCodec = null; var codecs = undefined; if (media.attributes && media.attributes.CODECS) { codecs = parseCodecs(media.attributes.CODECS); videoCodec = codecs.videoCodec; codecCount = codecs.codecCount; } master.playlists.forEach(function (variant) { var variantCodecs = { codecCount: 2, videoCodec: null }; if (variant.attributes && variant.attributes.CODECS) { var codecString = variant.attributes.CODECS; variantCodecs = parseCodecs(codecString); if (window.MediaSource && window.MediaSource.isTypeSupported && !window.MediaSource.isTypeSupported('video/mp4; codecs="' + mapLegacyAvcCodecs_(codecString) + '"')) { variant.excludeUntil = Infinity; } } // if the streams differ in the presence or absence of audio or // video, they are incompatible if (variantCodecs.codecCount !== codecCount) { variant.excludeUntil = Infinity; } // if h.264 is specified on the current playlist, some flavor of // it must be specified on all compatible variants if (variantCodecs.videoCodec !== videoCodec) { variant.excludeUntil = Infinity; } }); } }, { key: 'updateAdCues_', value: function updateAdCues_(media) { var offset = 0; var seekable = this.seekable(); if (seekable.length) { offset = seekable.start(0); } _adCueTags2['default'].updateAdCues(media, this.cueTagsTrack_, offset); } }]); return MasterPlaylistController; })(_videoJs2['default'].EventTarget); exports.MasterPlaylistController = MasterPlaylistController; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./ad-cue-tags":1,"./decrypter-worker":4,"./playlist-loader":8,"./ranges":10,"./segment-loader":14,"./sync-controller":17,"./vtt-segment-loader":18,"videojs-contrib-media-sources/es5/codec-utils":64,"webworkify":75}],6:[function(require,module,exports){ (function (global){ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _binUtils = require('./bin-utils'); var REQUEST_ERRORS = { FAILURE: 2, TIMEOUT: -101, ABORTED: -102 }; exports.REQUEST_ERRORS = REQUEST_ERRORS; /** * Turns segment byterange into a string suitable for use in * HTTP Range requests * * @param {Object} byterange - an object with two values defining the start and end * of a byte-range */ var byterangeStr = function byterangeStr(byterange) { var byterangeStart = undefined; var byterangeEnd = undefined; // `byterangeEnd` is one less than `offset + length` because the HTTP range // header uses inclusive ranges byterangeEnd = byterange.offset + byterange.length - 1; byterangeStart = byterange.offset; return 'bytes=' + byterangeStart + '-' + byterangeEnd; }; /** * Defines headers for use in the xhr request for a particular segment. * * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader */ var segmentXhrHeaders = function segmentXhrHeaders(segment) { var headers = {}; if (segment.byterange) { headers.Range = byterangeStr(segment.byterange); } return headers; }; /** * Abort all requests * * @param {Object} activeXhrs - an object that tracks all XHR requests */ var abortAll = function abortAll(activeXhrs) { activeXhrs.forEach(function (xhr) { xhr.abort(); }); }; /** * Gather important bandwidth stats once a request has completed * * @param {Object} request - the XHR request from which to gather stats */ var getRequestStats = function getRequestStats(request) { return { bandwidth: request.bandwidth, bytesReceived: request.bytesReceived || 0, roundTripTime: request.roundTripTime || 0 }; }; /** * If possible gather bandwidth stats as a request is in * progress * * @param {Event} progressEvent - an event object from an XHR's progress event */ var getProgressStats = function getProgressStats(progressEvent) { var request = progressEvent.target; var roundTripTime = Date.now() - request.requestTime; var stats = { bandwidth: Infinity, bytesReceived: 0, roundTripTime: roundTripTime || 0 }; if (progressEvent.lengthComputable) { stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok // because we should only use bandwidth stats on progress to determine when // abort a request early due to insufficient bandwidth stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000); } return stats; }; /** * Handle all error conditions in one place and return an object * with all the information * * @param {Error|null} error - if non-null signals an error occured with the XHR * @param {Object} request - the XHR request that possibly generated the error */ var handleErrors = function handleErrors(error, request) { if (request.timedout) { return { status: request.status, message: 'HLS request timed-out at URL: ' + request.uri, code: REQUEST_ERRORS.TIMEOUT, xhr: request }; } if (request.aborted) { return { status: request.status, message: 'HLS request aborted at URL: ' + request.uri, code: REQUEST_ERRORS.ABORTED, xhr: request }; } if (error) { return { status: request.status, message: 'HLS request errored at URL: ' + request.uri, code: REQUEST_ERRORS.FAILURE, xhr: request }; } return null; }; /** * Handle responses for key data and convert the key data to the correct format * for the decryption step later * * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader * @param {Function} finishProcessingFn - a callback to execute to continue processing * this request */ var handleKeyResponse = function handleKeyResponse(segment, finishProcessingFn) { return function (error, request) { var response = request.response; var errorObj = handleErrors(error, request); if (errorObj) { return finishProcessingFn(errorObj, segment); } if (response.byteLength !== 16) { return finishProcessingFn({ status: request.status, message: 'Invalid HLS key at URL: ' + request.uri, code: REQUEST_ERRORS.FAILURE, xhr: request }, segment); } var view = new DataView(response); segment.key.bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]); return finishProcessingFn(null, segment); }; }; /** * Handle init-segment responses * * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader * @param {Function} finishProcessingFn - a callback to execute to continue processing * this request */ var handleInitSegmentResponse = function handleInitSegmentResponse(segment, finishProcessingFn) { return function (error, request) { var errorObj = handleErrors(error, request); if (errorObj) { return finishProcessingFn(errorObj, segment); } segment.map.bytes = new Uint8Array(request.response); return finishProcessingFn(null, segment); }; }; /** * Response handler for segment-requests being sure to set the correct * property depending on whether the segment is encryped or not * Also records and keeps track of stats that are used for ABR purposes * * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader * @param {Function} finishProcessingFn - a callback to execute to continue processing * this request */ var handleSegmentResponse = function handleSegmentResponse(segment, finishProcessingFn) { return function (error, request) { var errorObj = handleErrors(error, request); if (errorObj) { return finishProcessingFn(errorObj, segment); } segment.stats = getRequestStats(request); if (segment.key) { segment.encryptedBytes = new Uint8Array(request.response); } else { segment.bytes = new Uint8Array(request.response); } return finishProcessingFn(null, segment); }; }; /** * Decrypt the segment via the decryption web worker * * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader * @param {Function} doneFn - a callback that is executed after decryption has completed */ var decryptSegment = function decryptSegment(decrypter, segment, doneFn) { var decryptionHandler = function decryptionHandler(event) { if (event.data.source === segment.requestId) { decrypter.removeEventListener('message', decryptionHandler); var decrypted = event.data.decrypted; segment.bytes = new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength); return doneFn(null, segment); } }; decrypter.addEventListener('message', decryptionHandler); // this is an encrypted segment // incrementally decrypt the segment decrypter.postMessage((0, _binUtils.createTransferableMessage)({ source: segment.requestId, encrypted: segment.encryptedBytes, key: segment.key.bytes, iv: segment.key.iv }), [segment.encryptedBytes.buffer, segment.key.bytes.buffer]); }; /** * The purpose of this function is to get the most pertinent error from the * array of errors. * For instance if a timeout and two aborts occur, then the aborts were * likely triggered by the timeout so return that error object. */ var getMostImportantError = function getMostImportantError(errors) { return errors.reduce(function (prev, err) { return err.code > prev.code ? err : prev; }); }; /** * This function waits for all XHRs to finish (with either success or failure) * before continueing processing via it's callback. The function gathers errors * from each request into a single errors array so that the error status for * each request can be examined later. * * @param {Object} activeXhrs - an object that tracks all XHR requests * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines * @param {Function} doneFn - a callback that is executed after all resources have been * downloaded and any decryption completed */ var waitForCompletion = function waitForCompletion(activeXhrs, decrypter, doneFn) { var errors = []; var count = 0; return function (error, segment) { if (error) { // If there are errors, we have to abort any outstanding requests abortAll(activeXhrs); errors.push(error); } count += 1; if (count === activeXhrs.length) { // Keep track of when *all* of the requests have completed segment.endOfAllRequests = Date.now(); if (errors.length > 0) { var worstError = getMostImportantError(errors); return doneFn(worstError, segment); } if (segment.encryptedBytes) { return decryptSegment(decrypter, segment, doneFn); } // Otherwise, everything is ready just continue return doneFn(null, segment); } }; }; /** * Simple progress event callback handler that gathers some stats before * executing a provided callback with the `segment` object * * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader * @param {Function} progressFn - a callback that is executed each time a progress event is received * @param {Event} event - the progress event object from XMLHttpRequest */ var handleProgress = function handleProgress(segment, progressFn) { return function (event) { segment.stats = getProgressStats(event); return progressFn(event, segment); }; }; /** * Load all resources and does any processing necessary for a media-segment * * Features: * decrypts the media-segment if it has a key uri and an iv * aborts *all* requests if *any* one request fails * * The segment object, at minimum, has the following format: * { * resolvedUri: String, * [byterange]: { * offset: Number, * length: Number * }, * [key]: { * resolvedUri: String * [byterange]: { * offset: Number, * length: Number * }, * iv: { * bytes: Uint32Array * } * }, * [map]: { * resolvedUri: String, * [byterange]: { * offset: Number, * length: Number * }, * [bytes]: Uint8Array * } * } * ...where [name] denotes optional properties * * @param {Function} xhr - an instance of the xhr wrapper in xhr.js * @param {Object} xhrOptions - the base options to provide to all xhr requests * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption routines * @param {Object} segment - a simplified copy of the segmentInfo object from SegmentLoader * @param {Function} progressFn - a callback that receives progress events from the main segment's xhr request * @param {Function} doneFn - a callback that is executed only once all requests have succeeded or failed * @returns {Function} a function that, when invoked, immediately aborts all outstanding requests */ var mediaSegmentRequest = function mediaSegmentRequest(xhr, xhrOptions, decryptionWorker, segment, progressFn, doneFn) { var activeXhrs = []; var finishProcessingFn = waitForCompletion(activeXhrs, decryptionWorker, doneFn); // optionally, request the decryption key if (segment.key) { var keyRequestOptions = _videoJs2['default'].mergeOptions(xhrOptions, { uri: segment.key.resolvedUri, responseType: 'arraybuffer' }); var keyRequestCallback = handleKeyResponse(segment, finishProcessingFn); var keyXhr = xhr(keyRequestOptions, keyRequestCallback); activeXhrs.push(keyXhr); } // optionally, request the associated media init segment if (segment.map && !segment.map.bytes) { var initSegmentOptions = _videoJs2['default'].mergeOptions(xhrOptions, { uri: segment.map.resolvedUri, responseType: 'arraybuffer', headers: segmentXhrHeaders(segment.map) }); var initSegmentRequestCallback = handleInitSegmentResponse(segment, finishProcessingFn); var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback); activeXhrs.push(initSegmentXhr); } var segmentRequestOptions = _videoJs2['default'].mergeOptions(xhrOptions, { uri: segment.resolvedUri, responseType: 'arraybuffer', headers: segmentXhrHeaders(segment) }); var segmentRequestCallback = handleSegmentResponse(segment, finishProcessingFn); var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback); segmentXhr.addEventListener('progress', handleProgress(segment, progressFn)); activeXhrs.push(segmentXhr); return function () { return abortAll(activeXhrs); }; }; exports.mediaSegmentRequest = mediaSegmentRequest; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./bin-utils":2}],7:[function(require,module,exports){ (function (global){ /** * @file playback-watcher.js * * Playback starts, and now my watch begins. It shall not end until my death. I shall * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns * and win no glory. I shall live and die at my post. I am the corrector of the underflow. * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge * my life and honor to the Playback Watch, for this Player and all the Players to come. */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _ranges = require('./ranges'); var _ranges2 = _interopRequireDefault(_ranges); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); // Set of events that reset the playback-watcher time check logic and clear the timeout var timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error']; /** * @class PlaybackWatcher */ var PlaybackWatcher = (function () { /** * Represents an PlaybackWatcher object. * @constructor * @param {object} options an object that includes the tech and settings */ function PlaybackWatcher(options) { var _this = this; _classCallCheck(this, PlaybackWatcher); this.tech_ = options.tech; this.seekable = options.seekable; this.consecutiveUpdates = 0; this.lastRecordedTime = null; this.timer_ = null; this.checkCurrentTimeTimeout_ = null; if (options.debug) { this.logger_ = _videoJs2['default'].log.bind(_videoJs2['default'], 'playback-watcher ->'); } this.logger_('initialize'); var waitingHandler = function waitingHandler() { return _this.waiting_(); }; var cancelTimerHandler = function cancelTimerHandler() { return _this.cancelTimer_(); }; var fixesBadSeeksHandler = function fixesBadSeeksHandler() { return _this.fixesBadSeeks_(); }; this.tech_.on('seekablechanged', fixesBadSeeksHandler); this.tech_.on('waiting', waitingHandler); this.tech_.on(timerCancelEvents, cancelTimerHandler); this.monitorCurrentTime_(); // Define the dispose function to clean up our events this.dispose = function () { _this.logger_('dispose'); _this.tech_.off('seekablechanged', fixesBadSeeksHandler); _this.tech_.off('waiting', waitingHandler); _this.tech_.off(timerCancelEvents, cancelTimerHandler); if (_this.checkCurrentTimeTimeout_) { clearTimeout(_this.checkCurrentTimeTimeout_); } _this.cancelTimer_(); }; } /** * Periodically check current time to see if playback stopped * * @private */ _createClass(PlaybackWatcher, [{ key: 'monitorCurrentTime_', value: function monitorCurrentTime_() { this.checkCurrentTime_(); if (this.checkCurrentTimeTimeout_) { clearTimeout(this.checkCurrentTimeTimeout_); } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15 this.checkCurrentTimeTimeout_ = setTimeout(this.monitorCurrentTime_.bind(this), 250); } /** * The purpose of this function is to emulate the "waiting" event on * browsers that do not emit it when they are waiting for more * data to continue playback * * @private */ }, { key: 'checkCurrentTime_', value: function checkCurrentTime_() { if (this.tech_.seeking() && this.fixesBadSeeks_()) { this.consecutiveUpdates = 0; this.lastRecordedTime = this.tech_.currentTime(); return; } if (this.tech_.paused() || this.tech_.seeking()) { return; } var currentTime = this.tech_.currentTime(); if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) { this.consecutiveUpdates++; this.waiting_(); } else if (currentTime === this.lastRecordedTime) { this.consecutiveUpdates++; } else { this.consecutiveUpdates = 0; this.lastRecordedTime = currentTime; } } /** * Cancels any pending timers and resets the 'timeupdate' mechanism * designed to detect that we are stalled * * @private */ }, { key: 'cancelTimer_', value: function cancelTimer_() { this.consecutiveUpdates = 0; if (this.timer_) { this.logger_('cancelTimer_'); clearTimeout(this.timer_); } this.timer_ = null; } /** * Fixes situations where there's a bad seek * * @return {Boolean} whether an action was taken to fix the seek * @private */ }, { key: 'fixesBadSeeks_', value: function fixesBadSeeks_() { var seekable = this.seekable(); var currentTime = this.tech_.currentTime(); if (this.tech_.seeking() && this.outsideOfSeekableWindow_(seekable, currentTime)) { var seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting) this.logger_('Trying to seek outside of seekable at time ' + currentTime + ' with ' + ('seekable range ' + _ranges2['default'].printableRange(seekable) + '. Seeking to ') + (seekableEnd + '.')); this.tech_.setCurrentTime(seekableEnd); return true; } return false; } /** * Handler for situations when we determine the player is waiting * * @private */ }, { key: 'waiting_', value: function waiting_() { var seekable = this.seekable(); var currentTime = this.tech_.currentTime(); if (this.tech_.seeking() && this.fixesBadSeeks_()) { return; } if (this.tech_.seeking() || this.timer_ !== null) { return; } if (this.fellOutOfLiveWindow_(seekable, currentTime)) { var livePoint = seekable.end(seekable.length - 1); this.logger_('Fell out of live window at time ' + currentTime + '. Seeking to ' + ('live point (seekable end) ' + livePoint)); this.cancelTimer_(); this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS this.tech_.trigger('liveresync'); return; } var buffered = this.tech_.buffered(); var nextRange = _ranges2['default'].findNextRange(buffered, currentTime); if (this.videoUnderflow_(nextRange, buffered, currentTime)) { // Even though the video underflowed and was stuck in a gap, the audio overplayed // the gap, leading currentTime into a buffered range. Seeking to currentTime // allows the video to catch up to the audio position without losing any audio // (only suffering ~3 seconds of frozen video and a pause in audio playback). this.cancelTimer_(); this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS this.tech_.trigger('videounderflow'); return; } // check for gap if (nextRange.length > 0) { var difference = nextRange.start(0) - currentTime; this.logger_('Stopped at ' + currentTime + ', setting timer for ' + difference + ', seeking ' + ('to ' + nextRange.start(0))); this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime); } } }, { key: 'outsideOfSeekableWindow_', value: function outsideOfSeekableWindow_(seekable, currentTime) { if (!seekable.length) { // we can't make a solid case if there's no seekable, default to false return false; } // provide a buffer of .1 seconds to handle rounding/imprecise numbers if (currentTime < seekable.start(0) - 0.1 || currentTime > seekable.end(seekable.length - 1) + 0.1) { return true; } return false; } }, { key: 'fellOutOfLiveWindow_', value: function fellOutOfLiveWindow_(seekable, currentTime) { if (seekable.length && // can't fall before 0 and 0 seekable start identifies VOD stream seekable.start(0) > 0 && currentTime < seekable.start(0)) { return true; } return false; } }, { key: 'videoUnderflow_', value: function videoUnderflow_(nextRange, buffered, currentTime) { if (nextRange.length === 0) { // Even if there is no available next range, there is still a possibility we are // stuck in a gap due to video underflow. var gap = this.gapFromVideoUnderflow_(buffered, currentTime); if (gap) { this.logger_('Encountered a gap in video from ' + gap.start + ' to ' + gap.end + '. ' + ('Seeking to current time ' + currentTime)); return true; } } return false; } /** * Timer callback. If playback still has not proceeded, then we seek * to the start of the next buffered region. * * @private */ }, { key: 'skipTheGap_', value: function skipTheGap_(scheduledCurrentTime) { var buffered = this.tech_.buffered(); var currentTime = this.tech_.currentTime(); var nextRange = _ranges2['default'].findNextRange(buffered, currentTime); this.cancelTimer_(); if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) { return; } this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played this.tech_.setCurrentTime(nextRange.start(0) + _ranges2['default'].TIME_FUDGE_FACTOR); } }, { key: 'gapFromVideoUnderflow_', value: function gapFromVideoUnderflow_(buffered, currentTime) { // At least in Chrome, if there is a gap in the video buffer, the audio will continue // playing for ~3 seconds after the video gap starts. This is done to account for // video buffer underflow/underrun (note that this is not done when there is audio // buffer underflow/underrun -- in that case the video will stop as soon as it // encounters the gap, as audio stalls are more noticeable/jarring to a user than // video stalls). The player's time will reflect the playthrough of audio, so the // time will appear as if we are in a buffered region, even if we are stuck in a // "gap." // // Example: // video buffer: 0 => 10.1, 10.2 => 20 // audio buffer: 0 => 20 // overall buffer: 0 => 10.1, 10.2 => 20 // current time: 13 // // Chrome's video froze at 10 seconds, where the video buffer encountered the gap, // however, the audio continued playing until it reached ~3 seconds past the gap // (13 seconds), at which point it stops as well. Since current time is past the // gap, findNextRange will return no ranges. // // To check for this issue, we see if there is a gap that starts somewhere within // a 3 second range (3 seconds +/- 1 second) back from our current time. var gaps = _ranges2['default'].findGaps(buffered); for (var i = 0; i < gaps.length; i++) { var start = gaps.start(i); var end = gaps.end(i); // gap is starts no more than 4 seconds back if (currentTime - start < 4 && currentTime - start > 2) { return { start: start, end: end }; } } return null; } /** * A debugging logger noop that is set to console.log only if debugging * is enabled globally * * @private */ }, { key: 'logger_', value: function logger_() {} }]); return PlaybackWatcher; })(); exports['default'] = PlaybackWatcher; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./ranges":10}],8:[function(require,module,exports){ (function (global){ /** * @file playlist-loader.js * * A state machine that manages the loading, caching, and updating of * M3U8 playlists. * */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _resolveUrl = require('./resolve-url'); var _resolveUrl2 = _interopRequireDefault(_resolveUrl); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _playlistJs = require('./playlist.js'); var _stream = require('./stream'); var _stream2 = _interopRequireDefault(_stream); var _m3u8Parser = require('m3u8-parser'); var _m3u8Parser2 = _interopRequireDefault(_m3u8Parser); var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); /** * Returns a new array of segments that is the result of merging * properties from an older list of segments onto an updated * list. No properties on the updated playlist will be overridden. * * @param {Array} original the outdated list of segments * @param {Array} update the updated list of segments * @param {Number=} offset the index of the first update * segment in the original segment list. For non-live playlists, * this should always be zero and does not need to be * specified. For live playlists, it should be the difference * between the media sequence numbers in the original and updated * playlists. * @return a list of merged segment objects */ var updateSegments = function updateSegments(original, update, offset) { var result = update.slice(); var length = undefined; var i = undefined; offset = offset || 0; length = Math.min(original.length, update.length + offset); for (i = offset; i < length; i++) { result[i - offset] = (0, _videoJs.mergeOptions)(original[i], result[i - offset]); } return result; }; /** * Returns a new master playlist that is the result of merging an * updated media playlist into the original version. If the * updated media playlist does not match any of the playlist * entries in the original master playlist, null is returned. * * @param {Object} master a parsed master M3U8 object * @param {Object} media a parsed media M3U8 object * @return {Object} a new object that represents the original * master playlist with the updated media playlist merged in, or * null if the merge produced no change. */ var updateMaster = function updateMaster(master, media) { var changed = false; var result = (0, _videoJs.mergeOptions)(master, {}); var i = master.playlists.length; var playlist = undefined; var segment = undefined; var j = undefined; while (i--) { playlist = result.playlists[i]; if (playlist.uri === media.uri) { // consider the playlist unchanged if the number of segments // are equal and the media sequence number is unchanged if (playlist.segments && media.segments && playlist.segments.length === media.segments.length && playlist.mediaSequence === media.mediaSequence) { continue; } result.playlists[i] = (0, _videoJs.mergeOptions)(playlist, media); result.playlists[media.uri] = result.playlists[i]; // if the update could overlap existing segment information, // merge the two lists if (playlist.segments) { result.playlists[i].segments = updateSegments(playlist.segments, media.segments, media.mediaSequence - playlist.mediaSequence); } // resolve any missing segment and key URIs j = 0; if (result.playlists[i].segments) { j = result.playlists[i].segments.length; } while (j--) { segment = result.playlists[i].segments[j]; if (!segment.resolvedUri) { segment.resolvedUri = (0, _resolveUrl2['default'])(playlist.resolvedUri, segment.uri); } if (segment.key && !segment.key.resolvedUri) { segment.key.resolvedUri = (0, _resolveUrl2['default'])(playlist.resolvedUri, segment.key.uri); } if (segment.map && !segment.map.resolvedUri) { segment.map.resolvedUri = (0, _resolveUrl2['default'])(playlist.resolvedUri, segment.map.uri); } } changed = true; } } return changed ? result : null; }; /** * Load a playlist from a remote location * * @class PlaylistLoader * @extends Stream * @param {String} srcUrl the url to start with * @param {Boolean} withCredentials the withCredentials xhr option * @constructor */ var PlaylistLoader = function PlaylistLoader(srcUrl, hls, withCredentials) { var _this = this; /* eslint-disable consistent-this */ var loader = this; /* eslint-enable consistent-this */ var dispose = undefined; var mediaUpdateTimeout = undefined; var request = undefined; var playlistRequestError = undefined; var haveMetadata = undefined; PlaylistLoader.prototype.constructor.call(this); this.hls_ = hls; if (!srcUrl) { throw new Error('A non-empty playlist URL is required'); } playlistRequestError = function (xhr, url, startingState) { loader.setBandwidth(request || xhr); // any in-flight request is now finished request = null; if (startingState) { loader.state = startingState; } loader.error = { playlist: loader.master.playlists[url], status: xhr.status, message: 'HLS playlist request error at URL: ' + url, responseText: xhr.responseText, code: xhr.status >= 500 ? 4 : 2 }; loader.trigger('error'); }; // update the playlist loader's state in response to a new or // updated playlist. haveMetadata = function (xhr, url) { var parser = undefined; var refreshDelay = undefined; var update = undefined; loader.setBandwidth(request || xhr); // any in-flight request is now finished request = null; loader.state = 'HAVE_METADATA'; parser = new _m3u8Parser2['default'].Parser(); parser.push(xhr.responseText); parser.end(); parser.manifest.uri = url; // merge this playlist into the master update = updateMaster(loader.master, parser.manifest); refreshDelay = (parser.manifest.targetDuration || 10) * 1000; loader.targetDuration = parser.manifest.targetDuration; if (update) { loader.master = update; loader.media_ = loader.master.playlists[parser.manifest.uri]; } else { // if the playlist is unchanged since the last reload, // try again after half the target duration refreshDelay /= 2; loader.trigger('playlistunchanged'); } // refresh live playlists after a target duration passes if (!loader.media().endList) { _globalWindow2['default'].clearTimeout(mediaUpdateTimeout); mediaUpdateTimeout = _globalWindow2['default'].setTimeout(function () { loader.trigger('mediaupdatetimeout'); }, refreshDelay); } loader.trigger('loadedplaylist'); }; // initialize the loader state loader.state = 'HAVE_NOTHING'; // capture the prototype dispose function dispose = this.dispose; /** * Abort any outstanding work and clean up. */ loader.dispose = function () { loader.stopRequest(); _globalWindow2['default'].clearTimeout(mediaUpdateTimeout); dispose.call(this); }; loader.stopRequest = function () { if (request) { var oldRequest = request; request = null; oldRequest.onreadystatechange = null; oldRequest.abort(); } }; /** * Returns the number of enabled playlists on the master playlist object * * @return {Number} number of eneabled playlists */ loader.enabledPlaylists_ = function () { return loader.master.playlists.filter(_playlistJs.isEnabled).length; }; /** * Returns whether the current playlist is the lowest rendition * * @return {Boolean} true if on lowest rendition */ loader.isLowestEnabledRendition_ = function () { if (loader.master.playlists.length === 1) { return true; } var media = loader.media(); var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE; return loader.master.playlists.filter(function (playlist) { var enabled = (0, _playlistJs.isEnabled)(playlist); if (!enabled) { return false; } var bandwidth = 0; if (playlist && playlist.attributes) { bandwidth = playlist.attributes.BANDWIDTH; } return bandwidth < currentBandwidth; }).length === 0; }; /** * Returns whether the current playlist is the final available rendition * * @return {Boolean} true if on final rendition */ loader.isFinalRendition_ = function () { return loader.master.playlists.filter(_playlistJs.isEnabled).length === 1; }; /** * When called without any arguments, returns the currently * active media playlist. When called with a single argument, * triggers the playlist loader to asynchronously switch to the * specified media playlist. Calling this method while the * loader is in the HAVE_NOTHING causes an error to be emitted * but otherwise has no effect. * * @param {Object=} playlist the parsed media playlist * object to switch to * @return {Playlist} the current loaded media */ loader.media = function (playlist) { var startingState = loader.state; var mediaChange = undefined; // getter if (!playlist) { return loader.media_; } // setter if (loader.state === 'HAVE_NOTHING') { throw new Error('Cannot switch media playlist from ' + loader.state); } // find the playlist object if the target playlist has been // specified by URI if (typeof playlist === 'string') { if (!loader.master.playlists[playlist]) { throw new Error('Unknown playlist URI: ' + playlist); } playlist = loader.master.playlists[playlist]; } mediaChange = !loader.media_ || playlist.uri !== loader.media_.uri; // switch to fully loaded playlists immediately if (loader.master.playlists[playlist.uri].endList) { // abort outstanding playlist requests if (request) { request.onreadystatechange = null; request.abort(); request = null; } loader.state = 'HAVE_METADATA'; loader.media_ = playlist; // trigger media change if the active media has been updated if (mediaChange) { loader.trigger('mediachanging'); loader.trigger('mediachange'); } return; } // switching to the active playlist is a no-op if (!mediaChange) { return; } loader.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request if (request) { if ((0, _resolveUrl2['default'])(loader.master.uri, playlist.uri) === request.url) { // requesting to switch to the same playlist multiple times // has no effect after the first return; } request.onreadystatechange = null; request.abort(); request = null; } // request the new playlist if (this.media_) { this.trigger('mediachanging'); } request = this.hls_.xhr({ uri: (0, _resolveUrl2['default'])(loader.master.uri, playlist.uri), withCredentials: withCredentials }, function (error, req) { // disposed if (!request) { return; } if (error) { return playlistRequestError(request, playlist.uri, startingState); } haveMetadata(req, playlist.uri); // fire loadedmetadata the first time a media playlist is loaded if (startingState === 'HAVE_MASTER') { loader.trigger('loadedmetadata'); } else { loader.trigger('mediachange'); } }); }; /** * set the bandwidth on an xhr to the bandwidth on the playlist */ loader.setBandwidth = function (xhr) { loader.bandwidth = xhr.bandwidth; }; // live playlist staleness timeout loader.on('mediaupdatetimeout', function () { if (loader.state !== 'HAVE_METADATA') { // only refresh the media playlist if no other activity is going on return; } loader.state = 'HAVE_CURRENT_METADATA'; request = this.hls_.xhr({ uri: (0, _resolveUrl2['default'])(loader.master.uri, loader.media().uri), withCredentials: withCredentials }, function (error, req) { // disposed if (!request) { return; } if (error) { return playlistRequestError(request, loader.media().uri, 'HAVE_METADATA'); } haveMetadata(request, loader.media().uri); }); }); // setup initial sync info loader.on('firstplay', function () { var playlist = loader.media(); if (playlist) { playlist.syncInfo = { mediaSequence: playlist.mediaSequence, time: 0 }; } }); /** * pause loading of the playlist */ loader.pause = function () { loader.stopRequest(); _globalWindow2['default'].clearTimeout(mediaUpdateTimeout); if (loader.state === 'HAVE_NOTHING') { // If we pause the loader before any data has been retrieved, its as if we never // started, so reset to an unstarted state. loader.started = false; } }; /** * start loading of the playlist */ loader.load = function (isFinalRendition) { var media = loader.media(); _globalWindow2['default'].clearTimeout(mediaUpdateTimeout); if (isFinalRendition) { var refreshDelay = media ? media.targetDuration / 2 * 1000 : 5 * 1000; mediaUpdateTimeout = _globalWindow2['default'].setTimeout(loader.load.bind(null, false), refreshDelay); return; } if (!loader.started) { loader.start(); return; } if (media && !media.endList) { loader.trigger('mediaupdatetimeout'); } else { loader.trigger('loadedplaylist'); } }; /** * start loading of the playlist */ loader.start = function () { loader.started = true; // request the specified URL request = _this.hls_.xhr({ uri: srcUrl, withCredentials: withCredentials }, function (error, req) { var parser = undefined; var playlist = undefined; var i = undefined; // disposed if (!request) { return; } // clear the loader's request reference request = null; if (error) { loader.error = { status: req.status, message: 'HLS playlist request error at URL: ' + srcUrl, responseText: req.responseText, // MEDIA_ERR_NETWORK code: 2 }; if (loader.state === 'HAVE_NOTHING') { loader.started = false; } return loader.trigger('error'); } parser = new _m3u8Parser2['default'].Parser(); parser.push(req.responseText); parser.end(); loader.state = 'HAVE_MASTER'; parser.manifest.uri = srcUrl; // loaded a master playlist if (parser.manifest.playlists) { loader.master = parser.manifest; // setup by-URI lookups and resolve media playlist URIs i = loader.master.playlists.length; while (i--) { playlist = loader.master.playlists[i]; loader.master.playlists[playlist.uri] = playlist; playlist.resolvedUri = (0, _resolveUrl2['default'])(loader.master.uri, playlist.uri); } // resolve any media group URIs ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) { for (var groupKey in loader.master.mediaGroups[mediaType]) { for (var labelKey in loader.master.mediaGroups[mediaType][groupKey]) { var mediaProperties = loader.master.mediaGroups[mediaType][groupKey][labelKey]; if (mediaProperties.uri) { mediaProperties.resolvedUri = (0, _resolveUrl2['default'])(loader.master.uri, mediaProperties.uri); } } } }); loader.trigger('loadedplaylist'); if (!request) { // no media playlist was specifically selected so start // from the first listed one loader.media(parser.manifest.playlists[0]); } return; } // loaded a media playlist // infer a master playlist if none was previously requested loader.master = { mediaGroups: { 'AUDIO': {}, 'VIDEO': {}, 'CLOSED-CAPTIONS': {}, 'SUBTITLES': {} }, uri: _globalWindow2['default'].location.href, playlists: [{ uri: srcUrl }] }; loader.master.playlists[srcUrl] = loader.master.playlists[0]; loader.master.playlists[0].resolvedUri = srcUrl; haveMetadata(req, srcUrl); return loader.trigger('loadedmetadata'); }); }; }; PlaylistLoader.prototype = new _stream2['default'](); exports['default'] = PlaylistLoader; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./playlist.js":9,"./resolve-url":13,"./stream":16,"global/window":30,"m3u8-parser":31}],9:[function(require,module,exports){ (function (global){ /** * @file playlist.js * * Playlist related utilities. */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var Playlist = { /** * The number of segments that are unsafe to start playback at in * a live stream. Changing this value can cause playback stalls. * See HTTP Live Streaming, "Playing the Media Playlist File" * https://tools.ietf.org/html/draft-pantos-http-live-streaming-18#section-6.3.3 */ UNSAFE_LIVE_SEGMENTS: 3 }; /** * walk backward until we find a duration we can use * or return a failure * * @param {Playlist} playlist the playlist to walk through * @param {Number} endSequence the mediaSequence to stop walking on */ var backwardDuration = function backwardDuration(playlist, endSequence) { var result = 0; var i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following // the interval, use it var segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline // information that is earlier than endSequence if (segment) { if (typeof segment.start !== 'undefined') { return { result: segment.start, precise: true }; } if (typeof segment.end !== 'undefined') { return { result: segment.end - segment.duration, precise: true }; } } while (i--) { segment = playlist.segments[i]; if (typeof segment.end !== 'undefined') { return { result: result + segment.end, precise: true }; } result += segment.duration; if (typeof segment.start !== 'undefined') { return { result: result + segment.start, precise: true }; } } return { result: result, precise: false }; }; /** * walk forward until we find a duration we can use * or return a failure * * @param {Playlist} playlist the playlist to walk through * @param {Number} endSequence the mediaSequence to stop walking on */ var forwardDuration = function forwardDuration(playlist, endSequence) { var result = 0; var segment = undefined; var i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline // information for (; i < playlist.segments.length; i++) { segment = playlist.segments[i]; if (typeof segment.start !== 'undefined') { return { result: segment.start - result, precise: true }; } result += segment.duration; if (typeof segment.end !== 'undefined') { return { result: segment.end - result, precise: true }; } } // indicate we didn't find a useful duration estimate return { result: -1, precise: false }; }; /** * Calculate the media duration from the segments associated with a * playlist. The duration of a subinterval of the available segments * may be calculated by specifying an end index. * * @param {Object} playlist a media playlist object * @param {Number=} endSequence an exclusive upper boundary * for the playlist. Defaults to playlist length. * @param {Number} expired the amount of time that has dropped * off the front of the playlist in a live scenario * @return {Number} the duration between the first available segment * and end index. */ var intervalDuration = function intervalDuration(playlist, endSequence, expired) { var backward = undefined; var forward = undefined; if (typeof endSequence === 'undefined') { endSequence = playlist.mediaSequence + playlist.segments.length; } if (endSequence < playlist.mediaSequence) { return 0; } // do a backward walk to estimate the duration backward = backwardDuration(playlist, endSequence); if (backward.precise) { // if we were able to base our duration estimate on timing // information provided directly from the Media Source, return // it return backward.result; } // walk forward to see if a precise duration estimate can be made // that way forward = forwardDuration(playlist, endSequence); if (forward.precise) { // we found a segment that has been buffered and so it's // position is known precisely return forward.result; } // return the less-precise, playlist-based duration estimate return backward.result + expired; }; /** * Calculates the duration of a playlist. If a start and end index * are specified, the duration will be for the subset of the media * timeline between those two indices. The total duration for live * playlists is always Infinity. * * @param {Object} playlist a media playlist object * @param {Number=} endSequence an exclusive upper * boundary for the playlist. Defaults to the playlist media * sequence number plus its length. * @param {Number=} expired the amount of time that has * dropped off the front of the playlist in a live scenario * @return {Number} the duration between the start index and end * index. */ var duration = function duration(playlist, endSequence, expired) { if (!playlist) { return 0; } if (typeof expired !== 'number') { expired = 0; } // if a slice of the total duration is not requested, use // playlist-level duration indicators when they're present if (typeof endSequence === 'undefined') { // if present, use the duration specified in the playlist if (playlist.totalDuration) { return playlist.totalDuration; } // duration should be Infinity for live playlists if (!playlist.endList) { return _globalWindow2['default'].Infinity; } } // calculate the total duration based on the segment durations return intervalDuration(playlist, endSequence, expired); }; exports.duration = duration; /** * Calculate the time between two indexes in the current playlist * neight the start- nor the end-index need to be within the current * playlist in which case, the targetDuration of the playlist is used * to approximate the durations of the segments * * @param {Object} playlist a media playlist object * @param {Number} startIndex * @param {Number} endIndex * @return {Number} the number of seconds between startIndex and endIndex */ var sumDurations = function sumDurations(playlist, startIndex, endIndex) { var durations = 0; if (startIndex > endIndex) { var _ref = [endIndex, startIndex]; startIndex = _ref[0]; endIndex = _ref[1]; } if (startIndex < 0) { for (var i = startIndex; i < Math.min(0, endIndex); i++) { durations += playlist.targetDuration; } startIndex = 0; } for (var i = startIndex; i < endIndex; i++) { durations += playlist.segments[i].duration; } return durations; }; exports.sumDurations = sumDurations; /** * Returns an array with two sync points. The first being an expired sync point, which is * the most recent segment with timing sync data that has fallen off the playlist. The * second is a segment sync point, which is the first segment that has timing sync data in * the current playlist. * * @param {Object} playlist a media playlist object * @returns {Object} an object containing the two sync points * @returns {Object.expiredSync|null} sync point data from an expired segment * @returns {Object.segmentSync|null} sync point data from a segment in the playlist * @function getPlaylistSyncPoints */ var getPlaylistSyncPoints = function getPlaylistSyncPoints(playlist) { if (!playlist || !playlist.segments) { return [null, null]; } var expiredSync = playlist.syncInfo || (playlist.endList ? { time: 0, mediaSequence: 0 } : null); var segmentSync = null; // Find the first segment with timing information for (var i = 0, l = playlist.segments.length; i < l; i++) { var segment = playlist.segments[i]; if (typeof segment.start !== 'undefined') { segmentSync = { mediaSequence: playlist.mediaSequence + i, time: segment.start }; break; } } return { expiredSync: expiredSync, segmentSync: segmentSync }; }; /** * Calculates the amount of time expired from the playlist based on the provided * sync points. * * @param {Object} playlist a media playlist object * @param {Object|null} expiredSync sync point representing most recent segment with * timing sync data that has fallen off the playlist * @param {Object|null} segmentSync sync point representing the first segment that has * timing sync data in the playlist * @returns {Number} the amount of time expired from the playlist * @function calculateExpiredTime */ var calculateExpiredTime = function calculateExpiredTime(playlist) { // If we have both an expired sync point and a segment sync point // determine which sync point is closest to the start of the playlist // so the minimal amount of timing estimation is done. var _getPlaylistSyncPoints = getPlaylistSyncPoints(playlist); var expiredSync = _getPlaylistSyncPoints.expiredSync; var segmentSync = _getPlaylistSyncPoints.segmentSync; if (expiredSync && segmentSync) { var expiredDiff = expiredSync.mediaSequence - playlist.mediaSequence; var segmentDiff = segmentSync.mediaSequence - playlist.mediaSequence; var syncIndex = undefined; var syncTime = undefined; if (Math.abs(expiredDiff) > Math.abs(segmentDiff)) { syncIndex = segmentDiff; syncTime = -segmentSync.time; } else { syncIndex = expiredDiff; syncTime = expiredSync.time; } return Math.abs(syncTime + sumDurations(playlist, syncIndex, 0)); } // We only have an expired sync point, so base expired time on the expired sync point // and estimate the time from that sync point to the start of the playlist. if (expiredSync) { var syncIndex = expiredSync.mediaSequence - playlist.mediaSequence; return expiredSync.time + sumDurations(playlist, syncIndex, 0); } // We only have a segment sync point, so base expired time on the first segment we have // sync point data for and estimate the time from that media index to the start of the // playlist. if (segmentSync) { var syncIndex = segmentSync.mediaSequence - playlist.mediaSequence; return segmentSync.time - sumDurations(playlist, syncIndex, 0); } return null; }; /** * Calculates the playlist end time * * @param {Object} playlist a media playlist object * @param {Boolean|false} useSafeLiveEnd a boolean value indicating whether or not the playlist * end calculation should consider the safe live end (truncate the playlist * end by three segments). This is normally used for calculating the end of * the playlist's seekable range. * @returns {Number} the end time of playlist * @function playlistEnd */ var playlistEnd = function playlistEnd(playlist, useSafeLiveEnd) { if (!playlist || !playlist.segments) { return null; } if (playlist.endList) { return duration(playlist); } var expired = calculateExpiredTime(playlist); if (expired === null) { return null; } var endSequence = useSafeLiveEnd ? Math.max(0, playlist.segments.length - Playlist.UNSAFE_LIVE_SEGMENTS) : Math.max(0, playlist.segments.length); return intervalDuration(playlist, playlist.mediaSequence + endSequence, expired); }; exports.playlistEnd = playlistEnd; /** * Calculates the interval of time that is currently seekable in a * playlist. The returned time ranges are relative to the earliest * moment in the specified playlist that is still available. A full * seekable implementation for live streams would need to offset * these values by the duration of content that has expired from the * stream. * * @param {Object} playlist a media playlist object * dropped off the front of the playlist in a live scenario * @return {TimeRanges} the periods of time that are valid targets * for seeking */ var seekable = function seekable(playlist) { var useSafeLiveEnd = true; var seekableStart = calculateExpiredTime(playlist); var seekableEnd = playlistEnd(playlist, useSafeLiveEnd); if (seekableEnd === null) { return (0, _videoJs.createTimeRange)(); } return (0, _videoJs.createTimeRange)(seekableStart, seekableEnd); }; exports.seekable = seekable; var isWholeNumber = function isWholeNumber(num) { return num - Math.floor(num) === 0; }; var roundSignificantDigit = function roundSignificantDigit(increment, num) { // If we have a whole number, just add 1 to it if (isWholeNumber(num)) { return num + increment * 0.1; } var numDecimalDigits = num.toString().split('.')[1].length; for (var i = 1; i <= numDecimalDigits; i++) { var scale = Math.pow(10, i); var temp = num * scale; if (isWholeNumber(temp) || i === numDecimalDigits) { return (temp + increment) / scale; } } }; var ceilLeastSignificantDigit = roundSignificantDigit.bind(null, 1); var floorLeastSignificantDigit = roundSignificantDigit.bind(null, -1); /** * Determine the index and estimated starting time of the segment that * contains a specified playback position in a media playlist. * * @param {Object} playlist the media playlist to query * @param {Number} currentTime The number of seconds since the earliest * possible position to determine the containing segment for * @param {Number} startIndex * @param {Number} startTime * @return {Object} */ var getMediaInfoForTime_ = function getMediaInfoForTime_(playlist, currentTime, startIndex, startTime) { var i = undefined; var segment = undefined; var numSegments = playlist.segments.length; var time = currentTime - startTime; if (time < 0) { // Walk backward from startIndex in the playlist, adding durations // until we find a segment that contains `time` and return it if (startIndex > 0) { for (i = startIndex - 1; i >= 0; i--) { segment = playlist.segments[i]; time += floorLeastSignificantDigit(segment.duration); if (time > 0) { return { mediaIndex: i, startTime: startTime - sumDurations(playlist, startIndex, i) }; } } } // We were unable to find a good segment within the playlist // so select the first segment return { mediaIndex: 0, startTime: currentTime }; } // When startIndex is negative, we first walk forward to first segment // adding target durations. If we "run out of time" before getting to // the first segment, return the first segment if (startIndex < 0) { for (i = startIndex; i < 0; i++) { time -= playlist.targetDuration; if (time < 0) { return { mediaIndex: 0, startTime: currentTime }; } } startIndex = 0; } // Walk forward from startIndex in the playlist, subtracting durations // until we find a segment that contains `time` and return it for (i = startIndex; i < numSegments; i++) { segment = playlist.segments[i]; time -= ceilLeastSignificantDigit(segment.duration); if (time < 0) { return { mediaIndex: i, startTime: startTime + sumDurations(playlist, startIndex, i) }; } } // We are out of possible candidates so load the last one... return { mediaIndex: numSegments - 1, startTime: currentTime }; }; exports.getMediaInfoForTime_ = getMediaInfoForTime_; /** * Check whether the playlist is blacklisted or not. * * @param {Object} playlist the media playlist object * @return {boolean} whether the playlist is blacklisted or not * @function isBlacklisted */ var isBlacklisted = function isBlacklisted(playlist) { return playlist.excludeUntil && playlist.excludeUntil > Date.now(); }; exports.isBlacklisted = isBlacklisted; /** * Check whether the playlist is enabled or not. * * @param {Object} playlist the media playlist object * @return {boolean} whether the playlist is enabled or not * @function isEnabled */ var isEnabled = function isEnabled(playlist) { var blacklisted = isBlacklisted(playlist); return !playlist.disabled && !blacklisted; }; exports.isEnabled = isEnabled; Playlist.duration = duration; Playlist.seekable = seekable; Playlist.getMediaInfoForTime_ = getMediaInfoForTime_; Playlist.isEnabled = isEnabled; Playlist.isBlacklisted = isBlacklisted; Playlist.playlistEnd = playlistEnd; // exports exports['default'] = Playlist; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"global/window":30}],10:[function(require,module,exports){ (function (global){ /** * ranges * * Utilities for working with TimeRanges. * */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _slicedToArray = (function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i['return']) _i['return'](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError('Invalid attempt to destructure non-iterable instance'); } }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); // Fudge factor to account for TimeRanges rounding var TIME_FUDGE_FACTOR = 1 / 30; /** * Clamps a value to within a range * @param {Number} num - the value to clamp * @param {Number} start - the start of the range to clamp within, inclusive * @param {Number} end - the end of the range to clamp within, inclusive * @return {Number} */ var clamp = function clamp(num, _ref) { var _ref2 = _slicedToArray(_ref, 2); var start = _ref2[0]; var end = _ref2[1]; return Math.min(Math.max(start, num), end); }; var filterRanges = function filterRanges(timeRanges, predicate) { var results = []; var i = undefined; if (timeRanges && timeRanges.length) { // Search for ranges that match the predicate for (i = 0; i < timeRanges.length; i++) { if (predicate(timeRanges.start(i), timeRanges.end(i))) { results.push([timeRanges.start(i), timeRanges.end(i)]); } } } return _videoJs2['default'].createTimeRanges(results); }; /** * Attempts to find the buffered TimeRange that contains the specified * time. * @param {TimeRanges} buffered - the TimeRanges object to query * @param {number} time - the time to filter on. * @returns {TimeRanges} a new TimeRanges object */ var findRange = function findRange(buffered, time) { return filterRanges(buffered, function (start, end) { return start - TIME_FUDGE_FACTOR <= time && end + TIME_FUDGE_FACTOR >= time; }); }; /** * Returns the TimeRanges that begin later than the specified time. * @param {TimeRanges} timeRanges - the TimeRanges object to query * @param {number} time - the time to filter on. * @returns {TimeRanges} a new TimeRanges object. */ var findNextRange = function findNextRange(timeRanges, time) { return filterRanges(timeRanges, function (start) { return start - TIME_FUDGE_FACTOR >= time; }); }; /** * Returns gaps within a list of TimeRanges * @param {TimeRanges} buffered - the TimeRanges object * @return {TimeRanges} a TimeRanges object of gaps */ var findGaps = function findGaps(buffered) { if (buffered.length < 2) { return _videoJs2['default'].createTimeRanges(); } var ranges = []; for (var i = 1; i < buffered.length; i++) { var start = buffered.end(i - 1); var end = buffered.start(i); ranges.push([start, end]); } return _videoJs2['default'].createTimeRanges(ranges); }; /** * Search for a likely end time for the segment that was just appened * based on the state of the `buffered` property before and after the * append. If we fin only one such uncommon end-point return it. * @param {TimeRanges} original - the buffered time ranges before the update * @param {TimeRanges} update - the buffered time ranges after the update * @returns {Number|null} the end time added between `original` and `update`, * or null if one cannot be unambiguously determined. */ var findSoleUncommonTimeRangesEnd = function findSoleUncommonTimeRangesEnd(original, update) { var i = undefined; var start = undefined; var end = undefined; var result = []; var edges = []; // In order to qualify as a possible candidate, the end point must: // 1) Not have already existed in the `original` ranges // 2) Not result from the shrinking of a range that already existed // in the `original` ranges // 3) Not be contained inside of a range that existed in `original` var overlapsCurrentEnd = function overlapsCurrentEnd(span) { return span[0] <= end && span[1] >= end; }; if (original) { // Save all the edges in the `original` TimeRanges object for (i = 0; i < original.length; i++) { start = original.start(i); end = original.end(i); edges.push([start, end]); } } if (update) { // Save any end-points in `update` that are not in the `original` // TimeRanges object for (i = 0; i < update.length; i++) { start = update.start(i); end = update.end(i); if (edges.some(overlapsCurrentEnd)) { continue; } // at this point it must be a unique non-shrinking end edge result.push(end); } } // we err on the side of caution and return null if didn't find // exactly *one* differing end edge in the search above if (result.length !== 1) { return null; } return result[0]; }; /** * Calculate the intersection of two TimeRanges * @param {TimeRanges} bufferA * @param {TimeRanges} bufferB * @returns {TimeRanges} The interesection of `bufferA` with `bufferB` */ var bufferIntersection = function bufferIntersection(bufferA, bufferB) { var start = null; var end = null; var arity = 0; var extents = []; var ranges = []; if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) { return _videoJs2['default'].createTimeRange(); } // Handle the case where we have both buffers and create an // intersection of the two var count = bufferA.length; // A) Gather up all start and end times while (count--) { extents.push({ time: bufferA.start(count), type: 'start' }); extents.push({ time: bufferA.end(count), type: 'end' }); } count = bufferB.length; while (count--) { extents.push({ time: bufferB.start(count), type: 'start' }); extents.push({ time: bufferB.end(count), type: 'end' }); } // B) Sort them by time extents.sort(function (a, b) { return a.time - b.time; }); // C) Go along one by one incrementing arity for start and decrementing // arity for ends for (count = 0; count < extents.length; count++) { if (extents[count].type === 'start') { arity++; // D) If arity is ever incremented to 2 we are entering an // overlapping range if (arity === 2) { start = extents[count].time; } } else if (extents[count].type === 'end') { arity--; // E) If arity is ever decremented to 1 we leaving an // overlapping range if (arity === 1) { end = extents[count].time; } } // F) Record overlapping ranges if (start !== null && end !== null) { ranges.push([start, end]); start = null; end = null; } } return _videoJs2['default'].createTimeRanges(ranges); }; /** * Calculates the percentage of `segmentRange` that overlaps the * `buffered` time ranges. * @param {TimeRanges} segmentRange - the time range that the segment * covers adjusted according to currentTime * @param {TimeRanges} referenceRange - the original time range that the * segment covers * @param {Number} currentTime - time in seconds where the current playback * is at * @param {TimeRanges} buffered - the currently buffered time ranges * @returns {Number} percent of the segment currently buffered */ var calculateBufferedPercent = function calculateBufferedPercent(adjustedRange, referenceRange, currentTime, buffered) { var referenceDuration = referenceRange.end(0) - referenceRange.start(0); var adjustedDuration = adjustedRange.end(0) - adjustedRange.start(0); var bufferMissingFromAdjusted = referenceDuration - adjustedDuration; var adjustedIntersection = bufferIntersection(adjustedRange, buffered); var referenceIntersection = bufferIntersection(referenceRange, buffered); var adjustedOverlap = 0; var referenceOverlap = 0; var count = adjustedIntersection.length; while (count--) { adjustedOverlap += adjustedIntersection.end(count) - adjustedIntersection.start(count); // If the current overlap segment starts at currentTime, then increase the // overlap duration so that it actually starts at the beginning of referenceRange // by including the difference between the two Range's durations // This is a work around for the way Flash has no buffer before currentTime if (adjustedIntersection.start(count) === currentTime) { adjustedOverlap += bufferMissingFromAdjusted; } } count = referenceIntersection.length; while (count--) { referenceOverlap += referenceIntersection.end(count) - referenceIntersection.start(count); } // Use whichever value is larger for the percentage-buffered since that value // is likely more accurate because the only way return Math.max(adjustedOverlap, referenceOverlap) / referenceDuration * 100; }; /** * Return the amount of a range specified by the startOfSegment and segmentDuration * overlaps the current buffered content. * * @param {Number} startOfSegment - the time where the segment begins * @param {Number} segmentDuration - the duration of the segment in seconds * @param {Number} currentTime - time in seconds where the current playback * is at * @param {TimeRanges} buffered - the state of the buffer * @returns {Number} percentage of the segment's time range that is * already in `buffered` */ var getSegmentBufferedPercent = function getSegmentBufferedPercent(startOfSegment, segmentDuration, currentTime, buffered) { var endOfSegment = startOfSegment + segmentDuration; // The entire time range of the segment var originalSegmentRange = _videoJs2['default'].createTimeRanges([[startOfSegment, endOfSegment]]); // The adjusted segment time range that is setup such that it starts // no earlier than currentTime // Flash has no notion of a back-buffer so adjustedSegmentRange adjusts // for that and the function will still return 100% if a only half of a // segment is actually in the buffer as long as the currentTime is also // half-way through the segment var adjustedSegmentRange = _videoJs2['default'].createTimeRanges([[clamp(startOfSegment, [currentTime, endOfSegment]), endOfSegment]]); // This condition happens when the currentTime is beyond the segment's // end time if (adjustedSegmentRange.start(0) === adjustedSegmentRange.end(0)) { return 0; } var percent = calculateBufferedPercent(adjustedSegmentRange, originalSegmentRange, currentTime, buffered); // If the segment is reported as having a zero duration, return 0% // since it is likely that we will need to fetch the segment if (isNaN(percent) || percent === Infinity || percent === -Infinity) { return 0; } return percent; }; /** * Gets a human readable string for a TimeRange * * @param {TimeRange} range * @returns {String} a human readable string */ var printableRange = function printableRange(range) { var strArr = []; if (!range || !range.length) { return ''; } for (var i = 0; i < range.length; i++) { strArr.push(range.start(i) + ' => ' + range.end(i)); } return strArr.join(', '); }; exports['default'] = { findRange: findRange, findNextRange: findNextRange, findGaps: findGaps, findSoleUncommonTimeRangesEnd: findSoleUncommonTimeRangesEnd, getSegmentBufferedPercent: getSegmentBufferedPercent, TIME_FUDGE_FACTOR: TIME_FUDGE_FACTOR, printableRange: printableRange }; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{}],11:[function(require,module,exports){ (function (global){ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var defaultOptions = { errorInterval: 30, getSource: function getSource(next) { var tech = this.tech({ IWillNotUseThisInPlugins: true }); var sourceObj = tech.currentSource_; return next(sourceObj); } }; /** * Main entry point for the plugin * * @param {Player} player a reference to a videojs Player instance * @param {Object} [options] an object with plugin options * @private */ var initPlugin = function initPlugin(player, options) { var lastCalled = 0; var seekTo = 0; var localOptions = _videoJs2['default'].mergeOptions(defaultOptions, options); /** * Player modifications to perform that must wait until `loadedmetadata` * has been triggered * * @private */ var loadedMetadataHandler = function loadedMetadataHandler() { if (seekTo) { player.currentTime(seekTo); } }; /** * Set the source on the player element, play, and seek if necessary * * @param {Object} sourceObj An object specifying the source url and mime-type to play * @private */ var setSource = function setSource(sourceObj) { if (sourceObj === null || sourceObj === undefined) { return; } seekTo = player.duration() !== Infinity && player.currentTime() || 0; player.one('loadedmetadata', loadedMetadataHandler); player.src(sourceObj); player.play(); }; /** * Attempt to get a source from either the built-in getSource function * or a custom function provided via the options * * @private */ var errorHandler = function errorHandler() { // Do not attempt to reload the source if a source-reload occurred before // 'errorInterval' time has elapsed since the last source-reload if (Date.now() - lastCalled < localOptions.errorInterval * 1000) { return; } if (!localOptions.getSource || typeof localOptions.getSource !== 'function') { _videoJs2['default'].log.error('ERROR: reloadSourceOnError - The option getSource must be a function!'); return; } lastCalled = Date.now(); return localOptions.getSource.call(player, setSource); }; /** * Unbind any event handlers that were bound by the plugin * * @private */ var cleanupEvents = function cleanupEvents() { player.off('loadedmetadata', loadedMetadataHandler); player.off('error', errorHandler); player.off('dispose', cleanupEvents); }; /** * Cleanup before re-initializing the plugin * * @param {Object} [newOptions] an object with plugin options * @private */ var reinitPlugin = function reinitPlugin(newOptions) { cleanupEvents(); initPlugin(player, newOptions); }; player.on('error', errorHandler); player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before // initializing the plugin player.reloadSourceOnError = reinitPlugin; }; /** * Reload the source when an error is detected as long as there * wasn't an error previously within the last 30 seconds * * @param {Object} [options] an object with plugin options */ var reloadSourceOnError = function reloadSourceOnError(options) { initPlugin(this, options); }; exports['default'] = reloadSourceOnError; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{}],12:[function(require,module,exports){ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _playlistJs = require('./playlist.js'); /** * Enable/disable playlist function. It is intended to have the first two * arguments partially-applied in order to create the final per-playlist * function. * * @param {PlaylistLoader} playlist - The rendition or media-playlist * @param {Function} changePlaylistFn - A function to be called after a * playlist's enabled-state has been changed. Will NOT be called if a * playlist's enabled-state is unchanged * @param {Boolean=} enable - Value to set the playlist enabled-state to * or if undefined returns the current enabled-state for the playlist * @return {Boolean} The current enabled-state of the playlist */ var enableFunction = function enableFunction(loader, playlistUri, changePlaylistFn, enable) { var playlist = loader.master.playlists[playlistUri]; var blacklisted = (0, _playlistJs.isBlacklisted)(playlist); var currentlyEnabled = (0, _playlistJs.isEnabled)(playlist); if (typeof enable === 'undefined') { return currentlyEnabled; } if (enable) { delete playlist.disabled; } else { playlist.disabled = true; } if (enable !== currentlyEnabled && !blacklisted) { // Ensure the outside world knows about our changes changePlaylistFn(); } return enable; }; /** * The representation object encapsulates the publicly visible information * in a media playlist along with a setter/getter-type function (enabled) * for changing the enabled-state of a particular playlist entry * * @class Representation */ var Representation = function Representation(hlsHandler, playlist, id) { _classCallCheck(this, Representation); // Get a reference to a bound version of fastQualityChange_ var fastChangeFunction = hlsHandler.masterPlaylistController_.fastQualityChange_.bind(hlsHandler.masterPlaylistController_); // Carefully descend into the playlist's attributes since most // properties are optional if (playlist.attributes) { var attributes = playlist.attributes; if (attributes.RESOLUTION) { var resolution = attributes.RESOLUTION; this.width = resolution.width; this.height = resolution.height; } this.bandwidth = attributes.BANDWIDTH; } // The id is simply the ordinality of the media playlist // within the master playlist this.id = id; // Partially-apply the enableFunction to create a playlist- // specific variant this.enabled = enableFunction.bind(this, hlsHandler.playlists, playlist.uri, fastChangeFunction); } /** * A mixin function that adds the `representations` api to an instance * of the HlsHandler class * @param {HlsHandler} hlsHandler - An instance of HlsHandler to add the * representation API into */ ; var renditionSelectionMixin = function renditionSelectionMixin(hlsHandler) { var playlists = hlsHandler.playlists; // Add a single API-specific function to the HlsHandler instance hlsHandler.representations = function () { return playlists.master.playlists.filter(function (media) { return !(0, _playlistJs.isBlacklisted)(media); }).map(function (e, i) { return new Representation(hlsHandler, e, e.uri); }); }; }; exports['default'] = renditionSelectionMixin; module.exports = exports['default']; },{"./playlist.js":9}],13:[function(require,module,exports){ /** * @file resolve-url.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _urlToolkit = require('url-toolkit'); var _urlToolkit2 = _interopRequireDefault(_urlToolkit); var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var resolveUrl = function resolveUrl(baseURL, relativeURL) { // return early if we don't need to resolve if (/^[a-z]+:/i.test(relativeURL)) { return relativeURL; } // if the base URL is relative then combine with the current location if (!/\/\//i.test(baseURL)) { baseURL = _urlToolkit2['default'].buildAbsoluteURL(_globalWindow2['default'].location.href, baseURL); } return _urlToolkit2['default'].buildAbsoluteURL(baseURL, relativeURL); }; exports['default'] = resolveUrl; module.exports = exports['default']; },{"global/window":30,"url-toolkit":61}],14:[function(require,module,exports){ (function (global){ /** * @file segment-loader.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x3, _x4, _x5) { var _again = true; _function: while (_again) { var object = _x3, property = _x4, receiver = _x5; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x3 = parent; _x4 = property; _x5 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _playlist = require('./playlist'); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _sourceUpdater = require('./source-updater'); var _sourceUpdater2 = _interopRequireDefault(_sourceUpdater); var _config = require('./config'); var _config2 = _interopRequireDefault(_config); var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs = require('videojs-contrib-media-sources/es5/remove-cues-from-track.js'); var _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2 = _interopRequireDefault(_videojsContribMediaSourcesEs5RemoveCuesFromTrackJs); var _binUtils = require('./bin-utils'); var _mediaSegmentRequest = require('./media-segment-request'); // in ms var CHECK_BUFFER_DELAY = 500; /** * Determines if we should call endOfStream on the media source based * on the state of the buffer or if appened segment was the final * segment in the playlist. * * @param {Object} playlist a media playlist object * @param {Object} mediaSource the MediaSource object * @param {Number} segmentIndex the index of segment we last appended * @returns {Boolean} do we need to call endOfStream on the MediaSource */ var detectEndOfStream = function detectEndOfStream(playlist, mediaSource, segmentIndex) { if (!playlist || !mediaSource) { return false; } var segments = playlist.segments; // determine a few boolean values to help make the branch below easier // to read var appendedLastSegment = segmentIndex === segments.length; // if we've buffered to the end of the video, we need to call endOfStream // so that MediaSources can trigger the `ended` event when it runs out of // buffered data instead of waiting for me return playlist.endList && mediaSource.readyState === 'open' && appendedLastSegment; }; /** * An object that manages segment loading and appending. * * @class SegmentLoader * @param {Object} options required and optional options * @extends videojs.EventTarget */ var SegmentLoader = (function (_videojs$EventTarget) { _inherits(SegmentLoader, _videojs$EventTarget); function SegmentLoader(options) { var _this = this; _classCallCheck(this, SegmentLoader); _get(Object.getPrototypeOf(SegmentLoader.prototype), 'constructor', this).call(this); // check pre-conditions if (!options) { throw new TypeError('Initialization options are required'); } if (typeof options.currentTime !== 'function') { throw new TypeError('No currentTime getter specified'); } if (!options.mediaSource) { throw new TypeError('No MediaSource specified'); } var settings = _videoJs2['default'].mergeOptions(_videoJs2['default'].options.hls, options); // public properties this.state = 'INIT'; this.bandwidth = settings.bandwidth; this.throughput = { rate: 0, count: 0 }; this.roundTrip = NaN; this.resetStats_(); this.mediaIndex = null; // private settings this.hasPlayed_ = settings.hasPlayed; this.currentTime_ = settings.currentTime; this.seekable_ = settings.seekable; this.seeking_ = settings.seeking; this.duration_ = settings.duration; this.mediaSource_ = settings.mediaSource; this.hls_ = settings.hls; this.loaderType_ = settings.loaderType; this.segmentMetadataTrack_ = settings.segmentMetadataTrack; // private instance variables this.checkBufferTimeout_ = null; this.error_ = void 0; this.currentTimeline_ = -1; this.pendingSegment_ = null; this.mimeType_ = null; this.sourceUpdater_ = null; this.xhrOptions_ = null; // Fragmented mp4 playback this.activeInitSegmentId_ = null; this.initSegments_ = {}; this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings // between a time in the display time and a segment index within // a playlist this.syncController_ = settings.syncController; this.syncPoint_ = { segmentIndex: 0, time: 0 }; this.syncController_.on('syncinfoupdate', function () { return _this.trigger('syncinfoupdate'); }); // ...for determining the fetch location this.fetchAtBuffer_ = false; if (settings.debug) { this.logger_ = _videoJs2['default'].log.bind(_videoJs2['default'], 'segment-loader', this.loaderType_, '->'); } } /** * reset all of our media stats * * @private */ _createClass(SegmentLoader, [{ key: 'resetStats_', value: function resetStats_() { this.mediaBytesTransferred = 0; this.mediaRequests = 0; this.mediaRequestsAborted = 0; this.mediaRequestsTimedout = 0; this.mediaRequestsErrored = 0; this.mediaTransferDuration = 0; this.mediaSecondsLoaded = 0; } /** * dispose of the SegmentLoader and reset to the default state */ }, { key: 'dispose', value: function dispose() { this.state = 'DISPOSED'; this.abort_(); if (this.sourceUpdater_) { this.sourceUpdater_.dispose(); } this.resetStats_(); } /** * abort anything that is currently doing on with the SegmentLoader * and reset to a default state */ }, { key: 'abort', value: function abort() { if (this.state !== 'WAITING') { if (this.pendingSegment_) { this.pendingSegment_ = null; } return; } this.abort_(); // don't wait for buffer check timeouts to begin fetching the // next segment if (!this.paused()) { this.state = 'READY'; this.monitorBuffer_(); } } /** * abort all pending xhr requests and null any pending segements * * @private */ }, { key: 'abort_', value: function abort_() { if (this.pendingSegment_) { this.pendingSegment_.abortRequests(); } // clear out the segment being processed this.pendingSegment_ = null; } /** * set an error on the segment loader and null out any pending segements * * @param {Error} error the error to set on the SegmentLoader * @return {Error} the error that was set or that is currently set */ }, { key: 'error', value: function error(_error) { if (typeof _error !== 'undefined') { this.error_ = _error; } this.pendingSegment_ = null; return this.error_; } /** * Indicates which time ranges are buffered * * @return {TimeRange} * TimeRange object representing the current buffered ranges */ }, { key: 'buffered_', value: function buffered_() { if (!this.sourceUpdater_) { return _videoJs2['default'].createTimeRanges(); } return this.sourceUpdater_.buffered(); } /** * Gets and sets init segment for the provided map * * @param {Object} map * The map object representing the init segment to get or set * @param {Boolean=} set * If true, the init segment for the provided map should be saved * @return {Object} * map object for desired init segment */ }, { key: 'initSegment', value: function initSegment(map) { var set = arguments.length <= 1 || arguments[1] === undefined ? false : arguments[1]; if (!map) { return null; } var id = (0, _binUtils.initSegmentId)(map); var storedMap = this.initSegments_[id]; if (set && !storedMap && map.bytes) { this.initSegments_[id] = storedMap = { resolvedUri: map.resolvedUri, byterange: map.byterange, bytes: map.bytes }; } return storedMap || map; } /** * Returns true if all configuration required for loading is present, otherwise false. * * @return {Boolean} True if the all configuration is ready for loading * @private */ }, { key: 'couldBeginLoading_', value: function couldBeginLoading_() { return this.playlist_ && ( // the source updater is created when init_ is called, so either having a // source updater or being in the INIT state with a mimeType is enough // to say we have all the needed configuration to start loading. this.sourceUpdater_ || this.mimeType_ && this.state === 'INIT') && !this.paused(); } /** * load a playlist and start to fill the buffer */ }, { key: 'load', value: function load() { // un-pause this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be // specified if (!this.playlist_) { return; } // not sure if this is the best place for this this.syncController_.setDateTimeMapping(this.playlist_); // if all the configuration is ready, initialize and begin loading if (this.state === 'INIT' && this.couldBeginLoading_()) { return this.init_(); } // if we're in the middle of processing a segment already, don't // kick off an additional segment request if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') { return; } this.state = 'READY'; } /** * Once all the starting parameters have been specified, begin * operation. This method should only be invoked from the INIT * state. * * @private */ }, { key: 'init_', value: function init_() { this.state = 'READY'; this.sourceUpdater_ = new _sourceUpdater2['default'](this.mediaSource_, this.mimeType_); this.resetEverything(); return this.monitorBuffer_(); } /** * set a playlist on the segment loader * * @param {PlaylistLoader} media the playlist to set on the segment loader */ }, { key: 'playlist', value: function playlist(newPlaylist) { var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1]; if (!newPlaylist) { return; } var oldPlaylist = this.playlist_; var segmentInfo = this.pendingSegment_; this.playlist_ = newPlaylist; this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist // is always our zero-time so force a sync update each time the playlist // is refreshed from the server if (!this.hasPlayed_()) { newPlaylist.syncInfo = { mediaSequence: newPlaylist.mediaSequence, time: 0 }; } // in VOD, this is always a rendition switch (or we updated our syncInfo above) // in LIVE, we always want to update with new playlists (including refreshes) this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start // buffering now if (this.state === 'INIT' && this.couldBeginLoading_()) { return this.init_(); } if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) { if (this.mediaIndex !== null) { // we must "resync" the segment loader when we switch renditions and // the segment loader is already synced to the previous rendition this.resyncLoader(); } // the rest of this function depends on `oldPlaylist` being defined return; } // we reloaded the same playlist so we are in a live scenario // and we will likely need to adjust the mediaIndex var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; this.logger_('mediaSequenceDiff', mediaSequenceDiff); // update the mediaIndex on the SegmentLoader // this is important because we can abort a request and this value must be // equal to the last appended mediaIndex if (this.mediaIndex !== null) { this.mediaIndex -= mediaSequenceDiff; } // update the mediaIndex on the SegmentInfo object // this is important because we will update this.mediaIndex with this value // in `handleUpdateEnd_` after the segment has been successfully appended if (segmentInfo) { segmentInfo.mediaIndex -= mediaSequenceDiff; // we need to update the referenced segment so that timing information is // saved for the new playlist's segment, however, if the segment fell off the // playlist, we can leave the old reference and just lose the timing info if (segmentInfo.mediaIndex >= 0) { segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex]; } } this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist); } /** * Prevent the loader from fetching additional segments. If there * is a segment request outstanding, it will finish processing * before the loader halts. A segment loader can be unpaused by * calling load(). */ }, { key: 'pause', value: function pause() { if (this.checkBufferTimeout_) { _globalWindow2['default'].clearTimeout(this.checkBufferTimeout_); this.checkBufferTimeout_ = null; } } /** * Returns whether the segment loader is fetching additional * segments when given the opportunity. This property can be * modified through calls to pause() and load(). */ }, { key: 'paused', value: function paused() { return this.checkBufferTimeout_ === null; } /** * create/set the following mimetype on the SourceBuffer through a * SourceUpdater * * @param {String} mimeType the mime type string to use */ }, { key: 'mimeType', value: function mimeType(_mimeType) { if (this.mimeType_) { return; } this.mimeType_ = _mimeType; // if we were unpaused but waiting for a sourceUpdater, start // buffering now if (this.state === 'INIT' && this.couldBeginLoading_()) { this.init_(); } } /** * Delete all the buffered data and reset the SegmentLoader */ }, { key: 'resetEverything', value: function resetEverything() { this.resetLoader(); this.remove(0, Infinity); } /** * Force the SegmentLoader to resync and start loading around the currentTime instead * of starting at the end of the buffer * * Useful for fast quality changes */ }, { key: 'resetLoader', value: function resetLoader() { this.fetchAtBuffer_ = false; this.resyncLoader(); } /** * Force the SegmentLoader to restart synchronization and make a conservative guess * before returning to the simple walk-forward method */ }, { key: 'resyncLoader', value: function resyncLoader() { this.mediaIndex = null; this.syncPoint_ = null; } /** * Remove any data in the source buffer between start and end times * @param {Number} start - the start time of the region to remove from the buffer * @param {Number} end - the end time of the region to remove from the buffer */ }, { key: 'remove', value: function remove(start, end) { if (this.sourceUpdater_) { this.sourceUpdater_.remove(start, end); } (0, _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2['default'])(start, end, this.segmentMetadataTrack_); } /** * (re-)schedule monitorBufferTick_ to run as soon as possible * * @private */ }, { key: 'monitorBuffer_', value: function monitorBuffer_() { if (this.checkBufferTimeout_) { _globalWindow2['default'].clearTimeout(this.checkBufferTimeout_); } this.checkBufferTimeout_ = _globalWindow2['default'].setTimeout(this.monitorBufferTick_.bind(this), 1); } /** * As long as the SegmentLoader is in the READY state, periodically * invoke fillBuffer_(). * * @private */ }, { key: 'monitorBufferTick_', value: function monitorBufferTick_() { if (this.state === 'READY') { this.fillBuffer_(); } if (this.checkBufferTimeout_) { _globalWindow2['default'].clearTimeout(this.checkBufferTimeout_); } this.checkBufferTimeout_ = _globalWindow2['default'].setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY); } /** * fill the buffer with segements unless the sourceBuffers are * currently updating * * Note: this function should only ever be called by monitorBuffer_ * and never directly * * @private */ }, { key: 'fillBuffer_', value: function fillBuffer_() { if (this.sourceUpdater_.updating()) { return; } if (!this.syncPoint_) { this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_()); } // see if we need to begin loading immediately var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_); if (!segmentInfo) { return; } var isEndOfStream = detectEndOfStream(this.playlist_, this.mediaSource_, segmentInfo.mediaIndex); if (isEndOfStream) { this.mediaSource_.endOfStream(); return; } if (segmentInfo.mediaIndex === this.playlist_.segments.length - 1 && this.mediaSource_.readyState === 'ended' && !this.seeking_()) { return; } // We will need to change timestampOffset of the sourceBuffer if either of // the following conditions are true: // - The segment.timeline !== this.currentTimeline // (we are crossing a discontinuity somehow) // - The "timestampOffset" for the start of this segment is less than // the currently set timestampOffset if (segmentInfo.timeline !== this.currentTimeline_ || segmentInfo.startOfSegment !== null && segmentInfo.startOfSegment < this.sourceUpdater_.timestampOffset()) { this.syncController_.reset(); segmentInfo.timestampOffset = segmentInfo.startOfSegment; } this.loadSegment_(segmentInfo); } /** * Determines what segment request should be made, given current playback * state. * * @param {TimeRanges} buffered - the state of the buffer * @param {Object} playlist - the playlist object to fetch segments from * @param {Number} mediaIndex - the previous mediaIndex fetched or null * @param {Boolean} hasPlayed - a flag indicating whether we have played or not * @param {Number} currentTime - the playback position in seconds * @param {Object} syncPoint - a segment info object that describes the * @returns {Object} a segment request object that describes the segment to load */ }, { key: 'checkBuffer_', value: function checkBuffer_(buffered, playlist, mediaIndex, hasPlayed, currentTime, syncPoint) { var lastBufferedEnd = 0; var startOfSegment = undefined; if (buffered.length) { lastBufferedEnd = buffered.end(buffered.length - 1); } var bufferedTime = Math.max(0, lastBufferedEnd - currentTime); if (!playlist.segments.length) { return null; } // if there is plenty of content buffered, and the video has // been played before relax for awhile if (bufferedTime >= _config2['default'].GOAL_BUFFER_LENGTH) { return null; } // if the video has not yet played once, and we already have // one segment downloaded do nothing if (!hasPlayed && bufferedTime >= 1) { return null; } this.logger_('checkBuffer_', 'mediaIndex:', mediaIndex, 'hasPlayed:', hasPlayed, 'currentTime:', currentTime, 'syncPoint:', syncPoint, 'fetchAtBuffer:', this.fetchAtBuffer_, 'bufferedTime:', bufferedTime); // When the syncPoint is null, there is no way of determining a good // conservative segment index to fetch from // The best thing to do here is to get the kind of sync-point data by // making a request if (syncPoint === null) { mediaIndex = this.getSyncSegmentCandidate_(playlist); this.logger_('getSync', 'mediaIndex:', mediaIndex); return this.generateSegmentInfo_(playlist, mediaIndex, null, true); } // Under normal playback conditions fetching is a simple walk forward if (mediaIndex !== null) { this.logger_('walkForward', 'mediaIndex:', mediaIndex + 1); var segment = playlist.segments[mediaIndex]; if (segment && segment.end) { startOfSegment = segment.end; } else { startOfSegment = lastBufferedEnd; } return this.generateSegmentInfo_(playlist, mediaIndex + 1, startOfSegment, false); } // There is a sync-point but the lack of a mediaIndex indicates that // we need to make a good conservative guess about which segment to // fetch if (this.fetchAtBuffer_) { // Find the segment containing the end of the buffer var mediaSourceInfo = (0, _playlist.getMediaInfoForTime_)(playlist, lastBufferedEnd, syncPoint.segmentIndex, syncPoint.time); mediaIndex = mediaSourceInfo.mediaIndex; startOfSegment = mediaSourceInfo.startTime; } else { // Find the segment containing currentTime var mediaSourceInfo = (0, _playlist.getMediaInfoForTime_)(playlist, currentTime, syncPoint.segmentIndex, syncPoint.time); mediaIndex = mediaSourceInfo.mediaIndex; startOfSegment = mediaSourceInfo.startTime; } this.logger_('getMediaIndexForTime', 'mediaIndex:', mediaIndex, 'startOfSegment:', startOfSegment); return this.generateSegmentInfo_(playlist, mediaIndex, startOfSegment, false); } /** * The segment loader has no recourse except to fetch a segment in the * current playlist and use the internal timestamps in that segment to * generate a syncPoint. This function returns a good candidate index * for that process. * * @param {Object} playlist - the playlist object to look for a * @returns {Number} An index of a segment from the playlist to load */ }, { key: 'getSyncSegmentCandidate_', value: function getSyncSegmentCandidate_(playlist) { var _this2 = this; if (this.currentTimeline_ === -1) { return 0; } var segmentIndexArray = playlist.segments.map(function (s, i) { return { timeline: s.timeline, segmentIndex: i }; }).filter(function (s) { return s.timeline === _this2.currentTimeline_; }); if (segmentIndexArray.length) { return segmentIndexArray[Math.min(segmentIndexArray.length - 1, 1)].segmentIndex; } return Math.max(playlist.segments.length - 1, 0); } }, { key: 'generateSegmentInfo_', value: function generateSegmentInfo_(playlist, mediaIndex, startOfSegment, isSyncRequest) { if (mediaIndex < 0 || mediaIndex >= playlist.segments.length) { return null; } var segment = playlist.segments[mediaIndex]; return { requestId: 'segment-loader-' + Math.random(), // resolve the segment URL relative to the playlist uri: segment.resolvedUri, // the segment's mediaIndex at the time it was requested mediaIndex: mediaIndex, // whether or not to update the SegmentLoader's state with this // segment's mediaIndex isSyncRequest: isSyncRequest, startOfSegment: startOfSegment, // the segment's playlist playlist: playlist, // unencrypted bytes of the segment bytes: null, // when a key is defined for this segment, the encrypted bytes encryptedBytes: null, // The target timestampOffset for this segment when we append it // to the source buffer timestampOffset: null, // The timeline that the segment is in timeline: segment.timeline, // The expected duration of the segment in seconds duration: segment.duration, // retain the segment in case the playlist updates while doing an async process segment: segment }; } /** * load a specific segment from a request into the buffer * * @private */ }, { key: 'loadSegment_', value: function loadSegment_(segmentInfo) { var _this3 = this; this.state = 'WAITING'; this.pendingSegment_ = segmentInfo; this.trimBackBuffer_(segmentInfo); segmentInfo.abortRequests = (0, _mediaSegmentRequest.mediaSegmentRequest)(this.hls_.xhr, this.xhrOptions_, this.decrypter_, this.createSimplifiedSegmentObj_(segmentInfo), // progress callback function (event, segment) { if (!_this3.pendingSegment_ || segment.requestId !== _this3.pendingSegment_.requestId) { return; } // TODO: Use progress-based bandwidth to early abort low-bandwidth situations _this3.trigger('progress'); }, this.segmentRequestFinished_.bind(this)); } /** * trim the back buffer so that we don't have too much data * in the source buffer * * @private * * @param {Object} segmentInfo - the current segment */ }, { key: 'trimBackBuffer_', value: function trimBackBuffer_(segmentInfo) { var seekable = this.seekable_(); var currentTime = this.currentTime_(); var removeToTime = 0; // Chrome has a hard limit of 150mb of // buffer and a very conservative "garbage collector" // We manually clear out the old buffer to ensure // we don't trigger the QuotaExceeded error // on the source buffer during subsequent appends // If we have a seekable range use that as the limit for what can be removed safely // otherwise remove anything older than 1 minute before the current play head if (seekable.length && seekable.start(0) > 0 && seekable.start(0) < currentTime) { removeToTime = seekable.start(0); } else { removeToTime = currentTime - 60; } if (removeToTime > 0) { this.remove(0, removeToTime); } } /** * created a simplified copy of the segment object with just the * information necessary to perform the XHR and decryption * * @private * * @param {Object} segmentInfo - the current segment * @returns {Object} a simplified segment object copy */ }, { key: 'createSimplifiedSegmentObj_', value: function createSimplifiedSegmentObj_(segmentInfo) { var segment = segmentInfo.segment; var simpleSegment = { resolvedUri: segment.resolvedUri, byterange: segment.byterange, requestId: segmentInfo.requestId }; if (segment.key) { // if the media sequence is greater than 2^32, the IV will be incorrect // assuming 10s segments, that would be about 1300 years var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]); simpleSegment.key = { resolvedUri: segment.key.resolvedUri, iv: iv }; } if (segment.map) { simpleSegment.map = this.initSegment(segment.map); } return simpleSegment; } /** * Handle the callback from the segmentRequest function and set the * associated SegmentLoader state and errors if necessary * * @private */ }, { key: 'segmentRequestFinished_', value: function segmentRequestFinished_(error, simpleSegment) { // every request counts as a media request even if it has been aborted // or canceled due to a timeout this.mediaRequests += 1; if (simpleSegment.stats) { this.mediaBytesTransferred += simpleSegment.stats.bytesReceived; this.mediaTransferDuration += simpleSegment.stats.roundTripTime; } // The request was aborted and the SegmentLoader has already been reset if (!this.pendingSegment_) { this.mediaRequestsAborted += 1; return; } // the request was aborted and the SegmentLoader has already started // another request. this can happen when the timeout for an aborted // request triggers due to a limitation in the XHR library // do not count this as any sort of request or we risk double-counting if (simpleSegment.requestId !== this.pendingSegment_.requestId) { return; } // an error occurred from the active pendingSegment_ so reset everything if (error) { this.pendingSegment_ = null; // the requests were aborted just record the aborted stat and exit // this is not a true error condition and nothing corrective needs // to be done if (error.code === _mediaSegmentRequest.REQUEST_ERRORS.ABORTED) { this.mediaRequestsAborted += 1; return; } this.state = 'READY'; this.pause(); // the error is really just that at least one of the requests timed-out // set the bandwidth to a very low value and trigger an ABR switch to // take emergency action if (error.code === _mediaSegmentRequest.REQUEST_ERRORS.TIMEOUT) { this.mediaRequestsTimedout += 1; this.bandwidth = 1; this.roundTrip = NaN; this.trigger('bandwidthupdate'); return; } // if control-flow has arrived here, then the error is real // emit an error event to blacklist the current playlist this.mediaRequestsErrored += 1; this.error(error); this.trigger('error'); return; } // the response was a success so set any bandwidth stats the request // generated for ABR purposes this.bandwidth = simpleSegment.stats.bandwidth; this.roundTrip = simpleSegment.stats.roundTripTime; // if this request included an initialization segment, save that data // to the initSegment cache if (simpleSegment.map) { simpleSegment.map = this.initSegment(simpleSegment.map, true); } this.processSegmentResponse_(simpleSegment); } /** * Move any important data from the simplified segment object * back to the real segment object for future phases * * @private */ }, { key: 'processSegmentResponse_', value: function processSegmentResponse_(simpleSegment) { var segmentInfo = this.pendingSegment_; segmentInfo.bytes = simpleSegment.bytes; if (simpleSegment.map) { segmentInfo.segment.map.bytes = simpleSegment.map.bytes; } segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests; this.handleSegment_(); } /** * append a decrypted segement to the SourceBuffer through a SourceUpdater * * @private */ }, { key: 'handleSegment_', value: function handleSegment_() { var _this4 = this; if (!this.pendingSegment_) { this.state = 'READY'; return; } this.state = 'APPENDING'; var segmentInfo = this.pendingSegment_; var segment = segmentInfo.segment; this.syncController_.probeSegmentInfo(segmentInfo); if (segmentInfo.isSyncRequest) { this.trigger('syncinfoupdate'); this.pendingSegment_ = null; this.state = 'READY'; return; } if (segmentInfo.timestampOffset !== null && segmentInfo.timestampOffset !== this.sourceUpdater_.timestampOffset()) { this.sourceUpdater_.timestampOffset(segmentInfo.timestampOffset); } // if the media initialization segment is changing, append it // before the content segment if (segment.map) { (function () { var initId = (0, _binUtils.initSegmentId)(segment.map); if (!_this4.activeInitSegmentId_ || _this4.activeInitSegmentId_ !== initId) { var initSegment = _this4.initSegment(segment.map); _this4.sourceUpdater_.appendBuffer(initSegment.bytes, function () { _this4.activeInitSegmentId_ = initId; }); } })(); } segmentInfo.byteLength = segmentInfo.bytes.byteLength; if (typeof segment.start === 'number' && typeof segment.end === 'number') { this.mediaSecondsLoaded += segment.end - segment.start; } else { this.mediaSecondsLoaded += segment.duration; } this.sourceUpdater_.appendBuffer(segmentInfo.bytes, this.handleUpdateEnd_.bind(this)); } /** * callback to run when appendBuffer is finished. detects if we are * in a good state to do things with the data we got, or if we need * to wait for more * * @private */ }, { key: 'handleUpdateEnd_', value: function handleUpdateEnd_() { this.logger_('handleUpdateEnd_', 'segmentInfo:', this.pendingSegment_); if (!this.pendingSegment_) { this.state = 'READY'; if (!this.paused()) { this.monitorBuffer_(); } return; } var segmentInfo = this.pendingSegment_; var segment = segmentInfo.segment; var isWalkingForward = this.mediaIndex !== null; this.pendingSegment_ = null; this.recordThroughput_(segmentInfo); this.addSegmentMetadataCue_(segmentInfo); this.state = 'READY'; this.mediaIndex = segmentInfo.mediaIndex; this.fetchAtBuffer_ = true; this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before // the following conditional otherwise it may consider this a bad "guess" // and attempt to resync when the post-update seekable window and live // point would mean that this was the perfect segment to fetch this.trigger('syncinfoupdate'); // If we previously appended a segment that ends more than 3 targetDurations before // the currentTime_ that means that our conservative guess was too conservative. // In that case, reset the loader state so that we try to use any information gained // from the previous request to create a new, more accurate, sync-point. if (segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3) { this.resetEverything(); return; } // Don't do a rendition switch unless we have enough time to get a sync segment // and conservatively guess if (isWalkingForward) { this.trigger('bandwidthupdate'); } this.trigger('progress'); // any time an update finishes and the last segment is in the // buffer, end the stream. this ensures the "ended" event will // fire if playback reaches that point. var isEndOfStream = detectEndOfStream(segmentInfo.playlist, this.mediaSource_, segmentInfo.mediaIndex + 1); if (isEndOfStream) { this.mediaSource_.endOfStream(); } if (!this.paused()) { this.monitorBuffer_(); } } /** * Records the current throughput of the decrypt, transmux, and append * portion of the semgment pipeline. `throughput.rate` is a the cumulative * moving average of the throughput. `throughput.count` is the number of * data points in the average. * * @private * @param {Object} segmentInfo the object returned by loadSegment */ }, { key: 'recordThroughput_', value: function recordThroughput_(segmentInfo) { var rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide // by zero in the case where the throughput is ridiculously high var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation: // newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1) this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count; } /** * A debugging logger noop that is set to console.log only if debugging * is enabled globally * * @private */ }, { key: 'logger_', value: function logger_() {} /** * Adds a cue to the segment-metadata track with some metadata information about the * segment * * @private * @param {Object} segmentInfo * the object returned by loadSegment * @method addSegmentMetadataCue_ */ }, { key: 'addSegmentMetadataCue_', value: function addSegmentMetadataCue_(segmentInfo) { if (!this.segmentMetadataTrack_) { return; } var segment = segmentInfo.segment; var start = segment.start; var end = segment.end; (0, _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2['default'])(start, end, this.segmentMetadataTrack_); var Cue = _globalWindow2['default'].WebKitDataCue || _globalWindow2['default'].VTTCue; var value = { uri: segmentInfo.uri, timeline: segmentInfo.timeline, playlist: segmentInfo.playlist.uri, start: start, end: end }; var data = JSON.stringify(value); var cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between // the differences of WebKitDataCue in safari and VTTCue in other browsers cue.value = value; this.segmentMetadataTrack_.addCue(cue); } }]); return SegmentLoader; })(_videoJs2['default'].EventTarget); exports['default'] = SegmentLoader; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./bin-utils":2,"./config":3,"./media-segment-request":6,"./playlist":9,"./source-updater":15,"global/window":30,"videojs-contrib-media-sources/es5/remove-cues-from-track.js":71}],15:[function(require,module,exports){ (function (global){ /** * @file source-updater.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var noop = function noop() {}; /** * A queue of callbacks to be serialized and applied when a * MediaSource and its associated SourceBuffers are not in the * updating state. It is used by the segment loader to update the * underlying SourceBuffers when new data is loaded, for instance. * * @class SourceUpdater * @param {MediaSource} mediaSource the MediaSource to create the * SourceBuffer from * @param {String} mimeType the desired MIME type of the underlying * SourceBuffer */ var SourceUpdater = (function () { function SourceUpdater(mediaSource, mimeType) { var _this = this; _classCallCheck(this, SourceUpdater); var createSourceBuffer = function createSourceBuffer() { _this.sourceBuffer_ = mediaSource.addSourceBuffer(mimeType); // run completion handlers and process callbacks as updateend // events fire _this.onUpdateendCallback_ = function () { var pendingCallback = _this.pendingCallback_; _this.pendingCallback_ = null; if (pendingCallback) { pendingCallback(); } _this.runCallback_(); }; _this.sourceBuffer_.addEventListener('updateend', _this.onUpdateendCallback_); _this.runCallback_(); }; this.callbacks_ = []; this.pendingCallback_ = null; this.timestampOffset_ = 0; this.mediaSource = mediaSource; this.processedAppend_ = false; if (mediaSource.readyState === 'closed') { mediaSource.addEventListener('sourceopen', createSourceBuffer); } else { createSourceBuffer(); } } /** * Aborts the current segment and resets the segment parser. * * @param {Function} done function to call when done * @see http://w3c.github.io/media-source/#widl-SourceBuffer-abort-void */ _createClass(SourceUpdater, [{ key: 'abort', value: function abort(done) { var _this2 = this; if (this.processedAppend_) { this.queueCallback_(function () { _this2.sourceBuffer_.abort(); }, done); } } /** * Queue an update to append an ArrayBuffer. * * @param {ArrayBuffer} bytes * @param {Function} done the function to call when done * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data */ }, { key: 'appendBuffer', value: function appendBuffer(bytes, done) { var _this3 = this; this.processedAppend_ = true; this.queueCallback_(function () { _this3.sourceBuffer_.appendBuffer(bytes); }, done); } /** * Indicates what TimeRanges are buffered in the managed SourceBuffer. * * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-buffered */ }, { key: 'buffered', value: function buffered() { if (!this.sourceBuffer_) { return _videoJs2['default'].createTimeRanges(); } return this.sourceBuffer_.buffered; } /** * Queue an update to remove a time range from the buffer. * * @param {Number} start where to start the removal * @param {Number} end where to end the removal * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end */ }, { key: 'remove', value: function remove(start, end) { var _this4 = this; if (this.processedAppend_) { this.queueCallback_(function () { _this4.sourceBuffer_.remove(start, end); }, noop); } } /** * Whether the underlying sourceBuffer is updating or not * * @return {Boolean} the updating status of the SourceBuffer */ }, { key: 'updating', value: function updating() { return !this.sourceBuffer_ || this.sourceBuffer_.updating || this.pendingCallback_; } /** * Set/get the timestampoffset on the SourceBuffer * * @return {Number} the timestamp offset */ }, { key: 'timestampOffset', value: function timestampOffset(offset) { var _this5 = this; if (typeof offset !== 'undefined') { this.queueCallback_(function () { _this5.sourceBuffer_.timestampOffset = offset; }); this.timestampOffset_ = offset; } return this.timestampOffset_; } /** * Queue a callback to run */ }, { key: 'queueCallback_', value: function queueCallback_(callback, done) { this.callbacks_.push([callback.bind(this), done]); this.runCallback_(); } /** * Run a queued callback */ }, { key: 'runCallback_', value: function runCallback_() { var callbacks = undefined; if (!this.updating() && this.callbacks_.length) { callbacks = this.callbacks_.shift(); this.pendingCallback_ = callbacks[1]; callbacks[0](); } } /** * dispose of the source updater and the underlying sourceBuffer */ }, { key: 'dispose', value: function dispose() { this.sourceBuffer_.removeEventListener('updateend', this.onUpdateendCallback_); if (this.sourceBuffer_ && this.mediaSource.readyState === 'open') { this.sourceBuffer_.abort(); } } }]); return SourceUpdater; })(); exports['default'] = SourceUpdater; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{}],16:[function(require,module,exports){ /** * @file stream.js */ /** * A lightweight readable stream implemention that handles event dispatching. * * @class Stream */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var Stream = (function () { function Stream() { _classCallCheck(this, Stream); this.listeners = {}; } /** * Add a listener for a specified event type. * * @param {String} type the event name * @param {Function} listener the callback to be invoked when an event of * the specified type occurs */ _createClass(Stream, [{ key: 'on', value: function on(type, listener) { if (!this.listeners[type]) { this.listeners[type] = []; } this.listeners[type].push(listener); } /** * Remove a listener for a specified event type. * * @param {String} type the event name * @param {Function} listener a function previously registered for this * type of event through `on` * @return {Boolean} if we could turn it off or not */ }, { key: 'off', value: function off(type, listener) { var index = undefined; if (!this.listeners[type]) { return false; } index = this.listeners[type].indexOf(listener); this.listeners[type].splice(index, 1); return index > -1; } /** * Trigger an event of the specified type on this stream. Any additional * arguments to this function are passed as parameters to event listeners. * * @param {String} type the event name */ }, { key: 'trigger', value: function trigger(type) { var callbacks = undefined; var i = undefined; var length = undefined; var args = undefined; callbacks = this.listeners[type]; if (!callbacks) { return; } // Slicing the arguments on every invocation of this method // can add a significant amount of overhead. Avoid the // intermediate object creation for the common case of a // single callback argument if (arguments.length === 2) { length = callbacks.length; for (i = 0; i < length; ++i) { callbacks[i].call(this, arguments[1]); } } else { args = Array.prototype.slice.call(arguments, 1); length = callbacks.length; for (i = 0; i < length; ++i) { callbacks[i].apply(this, args); } } } /** * Destroys the stream and cleans up. */ }, { key: 'dispose', value: function dispose() { this.listeners = {}; } /** * Forwards all `data` events on this stream to the destination stream. The * destination stream should provide a method `push` to receive the data * events as they arrive. * * @param {Stream} destination the stream that will receive all `data` events * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options */ }, { key: 'pipe', value: function pipe(destination) { this.on('data', function (data) { destination.push(data); }); } }]); return Stream; })(); exports['default'] = Stream; module.exports = exports['default']; },{}],17:[function(require,module,exports){ (function (global){ /** * @file sync-controller.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _muxJsLibMp4Probe = require('mux.js/lib/mp4/probe'); var _muxJsLibMp4Probe2 = _interopRequireDefault(_muxJsLibMp4Probe); var _muxJsLibToolsTsInspectorJs = require('mux.js/lib/tools/ts-inspector.js'); var _playlist = require('./playlist'); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var syncPointStrategies = [ // Stategy "VOD": Handle the VOD-case where the sync-point is *always* // the equivalence display-time 0 === segment-index 0 { name: 'VOD', run: function run(syncController, playlist, duration, currentTimeline, currentTime) { if (duration !== Infinity) { var syncPoint = { time: 0, segmentIndex: 0 }; return syncPoint; } return null; } }, // Stategy "ProgramDateTime": We have a program-date-time tag in this playlist { name: 'ProgramDateTime', run: function run(syncController, playlist, duration, currentTimeline, currentTime) { if (syncController.datetimeToDisplayTime && playlist.dateTimeObject) { var playlistTime = playlist.dateTimeObject.getTime() / 1000; var playlistStart = playlistTime + syncController.datetimeToDisplayTime; var syncPoint = { time: playlistStart, segmentIndex: 0 }; return syncPoint; } return null; } }, // Stategy "Segment": We have a known time mapping for a timeline and a // segment in the current timeline with timing data { name: 'Segment', run: function run(syncController, playlist, duration, currentTimeline, currentTime) { var segments = playlist.segments; var syncPoint = null; var lastDistance = null; currentTime = currentTime || 0; for (var i = 0; i < segments.length; i++) { var segment = segments[i]; if (segment.timeline === currentTimeline && typeof segment.start !== 'undefined') { var distance = Math.abs(currentTime - segment.start); // Once the distance begins to increase, we have passed // currentTime and can stop looking for better candidates if (lastDistance !== null && lastDistance < distance) { break; } if (!syncPoint || lastDistance === null || lastDistance >= distance) { lastDistance = distance; syncPoint = { time: segment.start, segmentIndex: i }; } } } return syncPoint; } }, // Stategy "Discontinuity": We have a discontinuity with a known // display-time { name: 'Discontinuity', run: function run(syncController, playlist, duration, currentTimeline, currentTime) { var syncPoint = null; currentTime = currentTime || 0; if (playlist.discontinuityStarts.length) { var lastDistance = null; for (var i = 0; i < playlist.discontinuityStarts.length; i++) { var segmentIndex = playlist.discontinuityStarts[i]; var discontinuity = playlist.discontinuitySequence + i + 1; var discontinuitySync = syncController.discontinuities[discontinuity]; if (discontinuitySync) { var distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed // currentTime and can stop looking for better candidates if (lastDistance !== null && lastDistance < distance) { break; } if (!syncPoint || lastDistance === null || lastDistance >= distance) { lastDistance = distance; syncPoint = { time: discontinuitySync.time, segmentIndex: segmentIndex }; } } } } return syncPoint; } }, // Stategy "Playlist": We have a playlist with a known mapping of // segment index to display time { name: 'Playlist', run: function run(syncController, playlist, duration, currentTimeline, currentTime) { if (playlist.syncInfo) { var syncPoint = { time: playlist.syncInfo.time, segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence }; return syncPoint; } return null; } }]; exports.syncPointStrategies = syncPointStrategies; var SyncController = (function (_videojs$EventTarget) { _inherits(SyncController, _videojs$EventTarget); function SyncController() { _classCallCheck(this, SyncController); _get(Object.getPrototypeOf(SyncController.prototype), 'constructor', this).call(this); // Segment Loader state variables... // ...for synching across variants this.inspectCache_ = undefined; // ...for synching across variants this.timelines = []; this.discontinuities = []; this.datetimeToDisplayTime = null; if (_videoJs2['default'].options.hls && _videoJs2['default'].options.hls.debug) { this.logger_ = _videoJs2['default'].log.bind(_videoJs2['default'], 'sync-controller ->'); } } /** * Find a sync-point for the playlist specified * * A sync-point is defined as a known mapping from display-time to * a segment-index in the current playlist. * * @param {Playlist} media - The playlist that needs a sync-point * @param {Number} duration - Duration of the MediaSource (Infinite if playing a live source) * @param {Number} currentTimeline - The last timeline from which a segment was loaded * @returns {Object} - A sync-point object */ _createClass(SyncController, [{ key: 'getSyncPoint', value: function getSyncPoint(playlist, duration, currentTimeline, currentTime) { var syncPoints = []; // Try to find a sync-point in by utilizing various strategies... for (var i = 0; i < syncPointStrategies.length; i++) { var strategy = syncPointStrategies[i]; var syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime); if (syncPoint) { syncPoint.strategy = strategy.name; syncPoints.push({ strategy: strategy.name, syncPoint: syncPoint }); this.logger_('syncPoint found via <' + strategy.name + '>:', syncPoint); } } if (!syncPoints.length) { // Signal that we need to attempt to get a sync-point manually // by fetching a segment in the playlist and constructing // a sync-point from that information return null; } // Now find the sync-point that is closest to the currentTime because // that should result in the most accurate guess about which segment // to fetch var bestSyncPoint = syncPoints[0].syncPoint; var bestDistance = Math.abs(syncPoints[0].syncPoint.time - currentTime); var bestStrategy = syncPoints[0].strategy; for (var i = 1; i < syncPoints.length; i++) { var newDistance = Math.abs(syncPoints[i].syncPoint.time - currentTime); if (newDistance < bestDistance) { bestDistance = newDistance; bestSyncPoint = syncPoints[i].syncPoint; bestStrategy = syncPoints[i].strategy; } } this.logger_('syncPoint with strategy <' + bestStrategy + '> chosen: ', bestSyncPoint); return bestSyncPoint; } /** * Save any meta-data present on the segments when segments leave * the live window to the playlist to allow for synchronization at the * playlist level later. * * @param {Playlist} oldPlaylist - The previous active playlist * @param {Playlist} newPlaylist - The updated and most current playlist */ }, { key: 'saveExpiredSegmentInfo', value: function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) { var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // When a segment expires from the playlist and it has a start time // save that information as a possible sync-point reference in future for (var i = mediaSequenceDiff - 1; i >= 0; i--) { var lastRemovedSegment = oldPlaylist.segments[i]; if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') { newPlaylist.syncInfo = { mediaSequence: oldPlaylist.mediaSequence + i, time: lastRemovedSegment.start }; this.logger_('playlist sync:', newPlaylist.syncInfo); this.trigger('syncinfoupdate'); break; } } } /** * Save the mapping from playlist's ProgramDateTime to display. This should * only ever happen once at the start of playback. * * @param {Playlist} playlist - The currently active playlist */ }, { key: 'setDateTimeMapping', value: function setDateTimeMapping(playlist) { if (!this.datetimeToDisplayTime && playlist.dateTimeObject) { var playlistTimestamp = playlist.dateTimeObject.getTime() / 1000; this.datetimeToDisplayTime = -playlistTimestamp; } } /** * Reset the state of the inspection cache when we do a rendition * switch */ }, { key: 'reset', value: function reset() { this.inspectCache_ = undefined; } /** * Probe or inspect a fmp4 or an mpeg2-ts segment to determine the start * and end of the segment in it's internal "media time". Used to generate * mappings from that internal "media time" to the display time that is * shown on the player. * * @param {SegmentInfo} segmentInfo - The current active request information */ }, { key: 'probeSegmentInfo', value: function probeSegmentInfo(segmentInfo) { var segment = segmentInfo.segment; var timingInfo = undefined; if (segment.map) { timingInfo = this.probeMp4Segment_(segmentInfo); } else { timingInfo = this.probeTsSegment_(segmentInfo); } if (timingInfo) { if (this.calculateSegmentTimeMapping_(segmentInfo, timingInfo)) { this.saveDiscontinuitySyncInfo_(segmentInfo); } } } /** * Probe an fmp4 or an mpeg2-ts segment to determine the start of the segment * in it's internal "media time". * * @private * @param {SegmentInfo} segmentInfo - The current active request information * @return {object} The start and end time of the current segment in "media time" */ }, { key: 'probeMp4Segment_', value: function probeMp4Segment_(segmentInfo) { var segment = segmentInfo.segment; var timescales = _muxJsLibMp4Probe2['default'].timescale(segment.map.bytes); var startTime = _muxJsLibMp4Probe2['default'].startTime(timescales, segmentInfo.bytes); if (segmentInfo.timestampOffset !== null) { segmentInfo.timestampOffset -= startTime; } return { start: startTime, end: startTime + segment.duration }; } /** * Probe an mpeg2-ts segment to determine the start and end of the segment * in it's internal "media time". * * @private * @param {SegmentInfo} segmentInfo - The current active request information * @return {object} The start and end time of the current segment in "media time" */ }, { key: 'probeTsSegment_', value: function probeTsSegment_(segmentInfo) { var timeInfo = (0, _muxJsLibToolsTsInspectorJs.inspect)(segmentInfo.bytes, this.inspectCache_); var segmentStartTime = undefined; var segmentEndTime = undefined; if (!timeInfo) { return null; } if (timeInfo.video && timeInfo.video.length === 2) { this.inspectCache_ = timeInfo.video[1].dts; segmentStartTime = timeInfo.video[0].dtsTime; segmentEndTime = timeInfo.video[1].dtsTime; } else if (timeInfo.audio && timeInfo.audio.length === 2) { this.inspectCache_ = timeInfo.audio[1].dts; segmentStartTime = timeInfo.audio[0].dtsTime; segmentEndTime = timeInfo.audio[1].dtsTime; } return { start: segmentStartTime, end: segmentEndTime }; } }, { key: 'timestampOffsetForTimeline', value: function timestampOffsetForTimeline(timeline) { if (typeof this.timelines[timeline] === 'undefined') { return null; } return this.timelines[timeline].time; } /** * Use the "media time" for a segment to generate a mapping to "display time" and * save that display time to the segment. * * @private * @param {SegmentInfo} segmentInfo - The current active request information * @param {object} timingInfo - The start and end time of the current segment in "media time" */ }, { key: 'calculateSegmentTimeMapping_', value: function calculateSegmentTimeMapping_(segmentInfo, timingInfo) { var segment = segmentInfo.segment; var mappingObj = this.timelines[segmentInfo.timeline]; if (segmentInfo.timestampOffset !== null) { this.logger_('tsO:', segmentInfo.timestampOffset); mappingObj = { time: segmentInfo.startOfSegment, mapping: segmentInfo.startOfSegment - timingInfo.start }; this.timelines[segmentInfo.timeline] = mappingObj; this.trigger('timestampoffset'); segment.start = segmentInfo.startOfSegment; segment.end = timingInfo.end + mappingObj.mapping; } else if (mappingObj) { segment.start = timingInfo.start + mappingObj.mapping; segment.end = timingInfo.end + mappingObj.mapping; } else { return false; } return true; } /** * Each time we have discontinuity in the playlist, attempt to calculate the location * in display of the start of the discontinuity and save that. We also save an accuracy * value so that we save values with the most accuracy (closest to 0.) * * @private * @param {SegmentInfo} segmentInfo - The current active request information */ }, { key: 'saveDiscontinuitySyncInfo_', value: function saveDiscontinuitySyncInfo_(segmentInfo) { var playlist = segmentInfo.playlist; var segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where // the start of the range and it's accuracy is 0 (greater accuracy values // mean more approximation) if (segment.discontinuity) { this.discontinuities[segment.timeline] = { time: segment.start, accuracy: 0 }; } else if (playlist.discontinuityStarts.length) { // Search for future discontinuities that we can provide better timing // information for and save that information for sync purposes for (var i = 0; i < playlist.discontinuityStarts.length; i++) { var segmentIndex = playlist.discontinuityStarts[i]; var discontinuity = playlist.discontinuitySequence + i + 1; var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex; var accuracy = Math.abs(mediaIndexDiff); if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) { if (mediaIndexDiff < 0) { this.discontinuities[discontinuity] = { time: segment.start - (0, _playlist.sumDurations)(playlist, segmentInfo.mediaIndex, segmentIndex), accuracy: accuracy }; } else { this.discontinuities[discontinuity] = { time: segment.end + (0, _playlist.sumDurations)(playlist, segmentInfo.mediaIndex + 1, segmentIndex), accuracy: accuracy }; } } } } } /** * A debugging logger noop that is set to console.log only if debugging * is enabled globally * * @private */ }, { key: 'logger_', value: function logger_() {} }]); return SyncController; })(_videoJs2['default'].EventTarget); exports['default'] = SyncController; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./playlist":9,"mux.js/lib/mp4/probe":55,"mux.js/lib/tools/ts-inspector.js":57}],18:[function(require,module,exports){ (function (global){ /** * @file vtt-segment-loader.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x2, _x3, _x4) { var _again = true; _function: while (_again) { var object = _x2, property = _x3, receiver = _x4; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x2 = parent; _x3 = property; _x4 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _segmentLoader = require('./segment-loader'); var _segmentLoader2 = _interopRequireDefault(_segmentLoader); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs = require('videojs-contrib-media-sources/es5/remove-cues-from-track.js'); var _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2 = _interopRequireDefault(_videojsContribMediaSourcesEs5RemoveCuesFromTrackJs); var _binUtils = require('./bin-utils'); var VTT_LINE_TERMINATORS = new Uint8Array('\n\n'.split('').map(function (char) { return char.charCodeAt(0); })); var uintToString = function uintToString(uintArray) { return String.fromCharCode.apply(null, uintArray); }; /** * An object that manages segment loading and appending. * * @class VTTSegmentLoader * @param {Object} options required and optional options * @extends videojs.EventTarget */ var VTTSegmentLoader = (function (_SegmentLoader) { _inherits(VTTSegmentLoader, _SegmentLoader); function VTTSegmentLoader(options) { _classCallCheck(this, VTTSegmentLoader); _get(Object.getPrototypeOf(VTTSegmentLoader.prototype), 'constructor', this).call(this, options); // SegmentLoader requires a MediaSource be specified or it will throw an error; // however, VTTSegmentLoader has no need of a media source, so delete the reference this.mediaSource_ = null; this.subtitlesTrack_ = null; } /** * Indicates which time ranges are buffered * * @return {TimeRange} * TimeRange object representing the current buffered ranges */ _createClass(VTTSegmentLoader, [{ key: 'buffered_', value: function buffered_() { if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues.length) { return _videoJs2['default'].createTimeRanges(); } var cues = this.subtitlesTrack_.cues; var start = cues[0].startTime; var end = cues[cues.length - 1].startTime; return _videoJs2['default'].createTimeRanges([[start, end]]); } /** * Gets and sets init segment for the provided map * * @param {Object} map * The map object representing the init segment to get or set * @param {Boolean=} set * If true, the init segment for the provided map should be saved * @return {Object} * map object for desired init segment */ }, { key: 'initSegment', value: function initSegment(map) { var set = arguments.length <= 1 || arguments[1] === undefined ? false : arguments[1]; if (!map) { return null; } var id = (0, _binUtils.initSegmentId)(map); var storedMap = this.initSegments_[id]; if (set && !storedMap && map.bytes) { // append WebVTT line terminators to the media initialization segment if it exists // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that // requires two or more WebVTT line terminators between the WebVTT header and the rest // of the file var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength; var combinedSegment = new Uint8Array(combinedByteLength); combinedSegment.set(map.bytes); combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength); this.initSegments_[id] = storedMap = { resolvedUri: map.resolvedUri, byterange: map.byterange, bytes: combinedSegment }; } return storedMap || map; } /** * Returns true if all configuration required for loading is present, otherwise false. * * @return {Boolean} True if the all configuration is ready for loading * @private */ }, { key: 'couldBeginLoading_', value: function couldBeginLoading_() { return this.playlist_ && this.subtitlesTrack_ && !this.paused(); } /** * Once all the starting parameters have been specified, begin * operation. This method should only be invoked from the INIT * state. * * @private */ }, { key: 'init_', value: function init_() { this.state = 'READY'; this.resetEverything(); return this.monitorBuffer_(); } /** * Set a subtitle track on the segment loader to add subtitles to * * @param {TextTrack} track * The text track to add loaded subtitles to */ }, { key: 'track', value: function track(_track) { this.subtitlesTrack_ = _track; // if we were unpaused but waiting for a sourceUpdater, start // buffering now if (this.state === 'INIT' && this.couldBeginLoading_()) { this.init_(); } } /** * Remove any data in the source buffer between start and end times * @param {Number} start - the start time of the region to remove from the buffer * @param {Number} end - the end time of the region to remove from the buffer */ }, { key: 'remove', value: function remove(start, end) { (0, _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2['default'])(start, end, this.subtitlesTrack_); } /** * fill the buffer with segements unless the sourceBuffers are * currently updating * * Note: this function should only ever be called by monitorBuffer_ * and never directly * * @private */ }, { key: 'fillBuffer_', value: function fillBuffer_() { var _this = this; if (!this.syncPoint_) { this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_()); } // see if we need to begin loading immediately var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_); segmentInfo = this.skipEmptySegments_(segmentInfo); if (!segmentInfo) { return; } if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) { // We don't have the timestamp offset that we need to sync subtitles. // Rerun on a timestamp offset or user interaction. var checkTimestampOffset = function checkTimestampOffset() { _this.state = 'READY'; if (!_this.paused()) { // if not paused, queue a buffer check as soon as possible _this.monitorBuffer_(); } }; this.syncController_.one('timestampoffset', checkTimestampOffset); this.state = 'WAITING_ON_TIMELINE'; return; } this.loadSegment_(segmentInfo); } /** * Prevents the segment loader from requesting segments we know contain no subtitles * by walking forward until we find the next segment that we don't know whether it is * empty or not. * * @param {Object} segmentInfo * a segment info object that describes the current segment * @return {Object} * a segment info object that describes the current segment */ }, { key: 'skipEmptySegments_', value: function skipEmptySegments_(segmentInfo) { while (segmentInfo && segmentInfo.segment.empty) { segmentInfo = this.generateSegmentInfo_(segmentInfo.playlist, segmentInfo.mediaIndex + 1, segmentInfo.startOfSegment + segmentInfo.duration, segmentInfo.isSyncRequest); } return segmentInfo; } /** * append a decrypted segement to the SourceBuffer through a SourceUpdater * * @private */ }, { key: 'handleSegment_', value: function handleSegment_() { var _this2 = this; if (!this.pendingSegment_) { this.state = 'READY'; return; } this.state = 'APPENDING'; var segmentInfo = this.pendingSegment_; var segment = segmentInfo.segment; // Make sure that vttjs has loaded, otherwise, wait till it finished loading if (typeof _globalWindow2['default'].WebVTT !== 'function' && this.subtitlesTrack_ && this.subtitlesTrack_.tech_) { var _ret = (function () { var loadHandler = function loadHandler() { _this2.handleSegment_(); }; _this2.state = 'WAITING_ON_VTTJS'; _this2.subtitlesTrack_.tech_.one('vttjsloaded', loadHandler); _this2.subtitlesTrack_.tech_.one('vttjserror', function () { _this2.subtitlesTrack_.tech_.off('vttjsloaded', loadHandler); _this2.error({ message: 'Error loading vtt.js' }); _this2.state = 'READY'; _this2.pause(); _this2.trigger('error'); }); return { v: undefined }; })(); if (typeof _ret === 'object') return _ret.v; } segment.requested = true; try { this.parseVTTCues_(segmentInfo); } catch (e) { this.error({ message: e.message }); this.state = 'READY'; this.pause(); return this.trigger('error'); } this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_); if (segmentInfo.isSyncRequest) { this.trigger('syncinfoupdate'); this.pendingSegment_ = null; this.state = 'READY'; return; } segmentInfo.byteLength = segmentInfo.bytes.byteLength; this.mediaSecondsLoaded += segment.duration; segmentInfo.cues.forEach(function (cue) { _this2.subtitlesTrack_.addCue(cue); }); this.handleUpdateEnd_(); } /** * Uses the WebVTT parser to parse the segment response * * @param {Object} segmentInfo * a segment info object that describes the current segment * @private */ }, { key: 'parseVTTCues_', value: function parseVTTCues_(segmentInfo) { var decoder = undefined; var decodeBytesToString = false; if (typeof _globalWindow2['default'].TextDecoder === 'function') { decoder = new _globalWindow2['default'].TextDecoder('utf8'); } else { decoder = _globalWindow2['default'].WebVTT.StringDecoder(); decodeBytesToString = true; } var parser = new _globalWindow2['default'].WebVTT.Parser(_globalWindow2['default'], _globalWindow2['default'].vttjs, decoder); segmentInfo.cues = []; segmentInfo.timestampmap = { MPEGTS: 0, LOCAL: 0 }; parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues); parser.ontimestampmap = function (map) { return segmentInfo.timestampmap = map; }; parser.onparsingerror = function (error) { _videoJs2['default'].log.warn('Error encountered when parsing cues: ' + error.message); }; if (segmentInfo.segment.map) { var mapData = segmentInfo.segment.map.bytes; if (decodeBytesToString) { mapData = uintToString(mapData); } parser.parse(mapData); } var segmentData = segmentInfo.bytes; if (decodeBytesToString) { segmentData = uintToString(segmentData); } parser.parse(segmentData); parser.flush(); } /** * Updates the start and end times of any cues parsed by the WebVTT parser using * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping * from the SyncController * * @param {Object} segmentInfo * a segment info object that describes the current segment * @param {Object} mappingObj * object containing a mapping from TS to media time * @param {Object} playlist * the playlist object containing the segment * @private */ }, { key: 'updateTimeMapping_', value: function updateTimeMapping_(segmentInfo, mappingObj, playlist) { var segment = segmentInfo.segment; if (!mappingObj) { // If the sync controller does not have a mapping of TS to Media Time for the // timeline, then we don't have enough information to update the cue // start/end times return; } if (!segmentInfo.cues.length) { // If there are no cues, we also do not have enough information to figure out // segment timing. Mark that the segment contains no cues so we don't re-request // an empty segment. segment.empty = true; return; } var timestampmap = segmentInfo.timestampmap; var diff = timestampmap.MPEGTS / 90000 - timestampmap.LOCAL + mappingObj.mapping; segmentInfo.cues.forEach(function (cue) { // First convert cue time to TS time using the timestamp-map provided within the vtt cue.startTime += diff; cue.endTime += diff; }); if (!playlist.syncInfo) { var firstStart = segmentInfo.cues[0].startTime; var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime; playlist.syncInfo = { mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex, time: Math.min(firstStart, lastStart - segment.duration) }; } } }]); return VTTSegmentLoader; })(_segmentLoader2['default']); exports['default'] = VTTSegmentLoader; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./bin-utils":2,"./segment-loader":14,"global/window":30,"videojs-contrib-media-sources/es5/remove-cues-from-track.js":71}],19:[function(require,module,exports){ (function (global){ /** * @file xhr.js */ /** * A wrapper for videojs.xhr that tracks bandwidth. * * @param {Object} options options for the XHR * @param {Function} callback the callback to call when done * @return {Request} the xhr request that is going to be made */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var xhrFactory = function xhrFactory() { var xhr = function XhrFunction(options, callback) { // Add a default timeout for all hls requests options = (0, _videoJs.mergeOptions)({ timeout: 45e3 }, options); // Allow an optional user-specified function to modify the option // object before we construct the xhr request var beforeRequest = XhrFunction.beforeRequest || _videoJs2['default'].Hls.xhr.beforeRequest; if (beforeRequest && typeof beforeRequest === 'function') { var newOptions = beforeRequest(options); if (newOptions) { options = newOptions; } } var request = (0, _videoJs.xhr)(options, function (error, response) { var reqResponse = request.response; if (!error && reqResponse) { request.responseTime = Date.now(); request.roundTripTime = request.responseTime - request.requestTime; request.bytesReceived = reqResponse.byteLength || reqResponse.length; if (!request.bandwidth) { request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000); } } // videojs.xhr now uses a specific code on the error // object to signal that a request has timed out instead // of setting a boolean on the request object if (error && error.code === 'ETIMEDOUT') { request.timedout = true; } // videojs.xhr no longer considers status codes outside of 200 and 0 // (for file uris) to be errors, but the old XHR did, so emulate that // behavior. Status 206 may be used in response to byterange requests. if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) { error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText))); } callback(error, request); }); var originalAbort = request.abort; request.abort = function () { request.aborted = true; return originalAbort.apply(request, arguments); }; request.uri = options.uri; request.requestTime = Date.now(); return request; }; return xhr; }; exports['default'] = xhrFactory; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{}],20:[function(require,module,exports){ /** * @file aes.js * * This file contains an adaptation of the AES decryption algorithm * from the Standford Javascript Cryptography Library. That work is * covered by the following copyright and permissions notice: * * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * The views and conclusions contained in the software and documentation * are those of the authors and should not be interpreted as representing * official policies, either expressed or implied, of the authors. */ /** * Expand the S-box tables. * * @private */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var precompute = function precompute() { var tables = [[[], [], [], [], []], [[], [], [], [], []]]; var encTable = tables[0]; var decTable = tables[1]; var sbox = encTable[4]; var sboxInv = decTable[4]; var i = undefined; var x = undefined; var xInv = undefined; var d = []; var th = []; var x2 = undefined; var x4 = undefined; var x8 = undefined; var s = undefined; var tEnc = undefined; var tDec = undefined; // Compute double and third tables for (i = 0; i < 256; i++) { th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i; } for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) { // Compute sbox s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4; s = s >> 8 ^ s & 255 ^ 99; sbox[x] = s; sboxInv[s] = x; // Compute MixColumns x8 = d[x4 = d[x2 = d[x]]]; tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100; tEnc = d[s] * 0x101 ^ s * 0x1010100; for (i = 0; i < 4; i++) { encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8; decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8; } } // Compactify. Considerable speedup on Firefox. for (i = 0; i < 5; i++) { encTable[i] = encTable[i].slice(0); decTable[i] = decTable[i].slice(0); } return tables; }; var aesTables = null; /** * Schedule out an AES key for both encryption and decryption. This * is a low-level class. Use a cipher mode to do bulk encryption. * * @class AES * @param key {Array} The key as an array of 4, 6 or 8 words. */ var AES = (function () { function AES(key) { _classCallCheck(this, AES); /** * The expanded S-box and inverse S-box tables. These will be computed * on the client so that we don't have to send them down the wire. * * There are two tables, _tables[0] is for encryption and * _tables[1] is for decryption. * * The first 4 sub-tables are the expanded S-box with MixColumns. The * last (_tables[01][4]) is the S-box itself. * * @private */ // if we have yet to precompute the S-box tables // do so now if (!aesTables) { aesTables = precompute(); } // then make a copy of that object for use 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()]]; var i = undefined; var j = undefined; var tmp = undefined; var encKey = undefined; var decKey = undefined; var sbox = this._tables[0][4]; var decTable = this._tables[1]; var keyLen = key.length; var rcon = 1; if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) { throw new Error('Invalid aes key size'); } encKey = key.slice(0); decKey = []; this._key = [encKey, decKey]; // schedule encryption keys for (i = keyLen; i < 4 * keyLen + 28; i++) { tmp = encKey[i - 1]; // apply sbox if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) { tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon if (i % keyLen === 0) { tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24; rcon = rcon << 1 ^ (rcon >> 7) * 283; } } encKey[i] = encKey[i - keyLen] ^ tmp; } // schedule decryption keys for (j = 0; i; j++, i--) { tmp = encKey[j & 3 ? i : i - 4]; if (i <= 4 || j < 4) { decKey[j] = tmp; } else { decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]]; } } } /** * Decrypt 16 bytes, specified as four 32-bit words. * * @param {Number} encrypted0 the first word to decrypt * @param {Number} encrypted1 the second word to decrypt * @param {Number} encrypted2 the third word to decrypt * @param {Number} encrypted3 the fourth word to decrypt * @param {Int32Array} out the array to write the decrypted words * into * @param {Number} offset the offset into the output array to start * writing results * @return {Array} The plaintext. */ _createClass(AES, [{ key: 'decrypt', value: function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) { var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data var a = encrypted0 ^ key[0]; var b = encrypted3 ^ key[1]; var c = encrypted2 ^ key[2]; var d = encrypted1 ^ key[3]; var a2 = undefined; var b2 = undefined; var c2 = undefined; // key.length === 2 ? var nInnerRounds = key.length / 4 - 2; var i = undefined; var kIndex = 4; var table = this._tables[1]; // load up the tables var table0 = table[0]; var table1 = table[1]; var table2 = table[2]; var table3 = table[3]; var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL. for (i = 0; i < nInnerRounds; i++) { a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex]; b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1]; c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2]; d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3]; kIndex += 4; a = a2;b = b2;c = c2; } // Last round. for (i = 0; i < 4; i++) { out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++]; a2 = a;a = b;b = c;c = d;d = a2; } } }]); return AES; })(); exports['default'] = AES; module.exports = exports['default']; },{}],21:[function(require,module,exports){ /** * @file async-stream.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _stream = require('./stream'); var _stream2 = _interopRequireDefault(_stream); /** * A wrapper around the Stream class to use setTiemout * and run stream "jobs" Asynchronously * * @class AsyncStream * @extends Stream */ var AsyncStream = (function (_Stream) { _inherits(AsyncStream, _Stream); function AsyncStream() { _classCallCheck(this, AsyncStream); _get(Object.getPrototypeOf(AsyncStream.prototype), 'constructor', this).call(this, _stream2['default']); this.jobs = []; this.delay = 1; this.timeout_ = null; } /** * process an async job * * @private */ _createClass(AsyncStream, [{ key: 'processJob_', value: function processJob_() { this.jobs.shift()(); if (this.jobs.length) { this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay); } else { this.timeout_ = null; } } /** * push a job into the stream * * @param {Function} job the job to push into the stream */ }, { key: 'push', value: function push(job) { this.jobs.push(job); if (!this.timeout_) { this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay); } } }]); return AsyncStream; })(_stream2['default']); exports['default'] = AsyncStream; module.exports = exports['default']; },{"./stream":24}],22:[function(require,module,exports){ /** * @file decrypter.js * * An asynchronous implementation of AES-128 CBC decryption with * PKCS#7 padding. */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _aes = require('./aes'); var _aes2 = _interopRequireDefault(_aes); var _asyncStream = require('./async-stream'); var _asyncStream2 = _interopRequireDefault(_asyncStream); var _pkcs7 = require('pkcs7'); /** * Convert network-order (big-endian) bytes into their little-endian * representation. */ var ntoh = function ntoh(word) { return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24; }; /** * Decrypt bytes using AES-128 with CBC and PKCS#7 padding. * * @param {Uint8Array} encrypted the encrypted bytes * @param {Uint32Array} key the bytes of the decryption key * @param {Uint32Array} initVector the initialization vector (IV) to * use for the first round of CBC. * @return {Uint8Array} the decrypted bytes * * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29 * @see https://tools.ietf.org/html/rfc2315 */ var decrypt = function decrypt(encrypted, key, initVector) { // word-level access to the encrypted bytes var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2); var decipher = new _aes2['default'](Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output var decrypted = new Uint8Array(encrypted.byteLength); var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and // decrypted data var init0 = undefined; var init1 = undefined; var init2 = undefined; var init3 = undefined; var encrypted0 = undefined; var encrypted1 = undefined; var encrypted2 = undefined; var encrypted3 = undefined; // iteration variable var wordIx = undefined; // pull out the words of the IV to ensure we don't modify the // passed-in reference and easier access init0 = initVector[0]; init1 = initVector[1]; init2 = initVector[2]; init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC) // to each decrypted block for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) { // convert big-endian (network order) words into little-endian // (javascript order) encrypted0 = ntoh(encrypted32[wordIx]); encrypted1 = ntoh(encrypted32[wordIx + 1]); encrypted2 = ntoh(encrypted32[wordIx + 2]); encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the // plaintext decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0); decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1); decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2); decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round init0 = encrypted0; init1 = encrypted1; init2 = encrypted2; init3 = encrypted3; } return decrypted; }; exports.decrypt = decrypt; /** * The `Decrypter` class that manages decryption of AES * data through `AsyncStream` objects and the `decrypt` * function * * @param {Uint8Array} encrypted the encrypted bytes * @param {Uint32Array} key the bytes of the decryption key * @param {Uint32Array} initVector the initialization vector (IV) to * @param {Function} done the function to run when done * @class Decrypter */ var Decrypter = (function () { function Decrypter(encrypted, key, initVector, done) { _classCallCheck(this, Decrypter); var step = Decrypter.STEP; var encrypted32 = new Int32Array(encrypted.buffer); var decrypted = new Uint8Array(encrypted.byteLength); var i = 0; this.asyncStream_ = new _asyncStream2['default'](); // split up the encryption job and do the individual chunks asynchronously this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted)); for (i = step; i < encrypted32.length; i += step) { initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]); this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted)); } // invoke the done() callback when everything is finished this.asyncStream_.push(function () { // remove pkcs#7 padding from the decrypted bytes done(null, (0, _pkcs7.unpad)(decrypted)); }); } /** * a getter for step the maximum number of bytes to process at one time * * @return {Number} the value of step 32000 */ _createClass(Decrypter, [{ key: 'decryptChunk_', /** * @private */ value: function decryptChunk_(encrypted, key, initVector, decrypted) { return function () { var bytes = decrypt(encrypted, key, initVector); decrypted.set(bytes, encrypted.byteOffset); }; } }], [{ key: 'STEP', get: function get() { // 4 * 8000; return 32000; } }]); return Decrypter; })(); exports.Decrypter = Decrypter; exports['default'] = { Decrypter: Decrypter, decrypt: decrypt }; },{"./aes":20,"./async-stream":21,"pkcs7":26}],23:[function(require,module,exports){ /** * @file index.js * * Index module to easily import the primary components of AES-128 * decryption. Like this: * * ```js * import {Decrypter, decrypt, AsyncStream} from 'aes-decrypter'; * ``` */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _decrypter = require('./decrypter'); var _asyncStream = require('./async-stream'); var _asyncStream2 = _interopRequireDefault(_asyncStream); exports['default'] = { decrypt: _decrypter.decrypt, Decrypter: _decrypter.Decrypter, AsyncStream: _asyncStream2['default'] }; module.exports = exports['default']; },{"./async-stream":21,"./decrypter":22}],24:[function(require,module,exports){ arguments[4][16][0].apply(exports,arguments) },{"dup":16}],25:[function(require,module,exports){ /* * pkcs7.pad * https://github.com/brightcove/pkcs7 * * Copyright (c) 2014 Brightcove * Licensed under the apache2 license. */ 'use strict'; var PADDING; /** * Returns a new Uint8Array that is padded with PKCS#7 padding. * @param plaintext {Uint8Array} the input bytes before encryption * @return {Uint8Array} the padded bytes * @see http://tools.ietf.org/html/rfc5652 */ module.exports = function pad(plaintext) { var padding = PADDING[(plaintext.byteLength % 16) || 0], result = new Uint8Array(plaintext.byteLength + padding.length); result.set(plaintext); result.set(padding, plaintext.byteLength); return result; }; // pre-define the padding values PADDING = [ [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16], [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15], [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14], [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13], [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12], [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11], [10, 10, 10, 10, 10, 10, 10, 10, 10, 10], [9, 9, 9, 9, 9, 9, 9, 9, 9], [8, 8, 8, 8, 8, 8, 8, 8], [7, 7, 7, 7, 7, 7, 7], [6, 6, 6, 6, 6, 6], [5, 5, 5, 5, 5], [4, 4, 4, 4], [3, 3, 3], [2, 2], [1] ]; },{}],26:[function(require,module,exports){ /* * pkcs7 * https://github.com/brightcove/pkcs7 * * Copyright (c) 2014 Brightcove * Licensed under the apache2 license. */ 'use strict'; exports.pad = require('./pad.js'); exports.unpad = require('./unpad.js'); },{"./pad.js":25,"./unpad.js":27}],27:[function(require,module,exports){ /* * pkcs7.unpad * https://github.com/brightcove/pkcs7 * * Copyright (c) 2014 Brightcove * Licensed under the apache2 license. */ 'use strict'; /** * Returns the subarray of a Uint8Array without PKCS#7 padding. * @param padded {Uint8Array} unencrypted bytes that have been padded * @return {Uint8Array} the unpadded bytes * @see http://tools.ietf.org/html/rfc5652 */ module.exports = function unpad(padded) { return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]); }; },{}],28:[function(require,module,exports){ },{}],29:[function(require,module,exports){ (function (global){ var topLevel = typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : {} var minDoc = require('min-document'); var doccy; if (typeof document !== 'undefined') { doccy = document; } else { doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4']; if (!doccy) { doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc; } } module.exports = doccy; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"min-document":28}],30:[function(require,module,exports){ (function (global){ var win; if (typeof window !== "undefined") { win = window; } else if (typeof global !== "undefined") { win = global; } else if (typeof self !== "undefined"){ win = self; } else { win = {}; } module.exports = win; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{}],31:[function(require,module,exports){ 'use strict'; var _lineStream = require('./line-stream'); var _lineStream2 = _interopRequireDefault(_lineStream); var _parseStream = require('./parse-stream'); var _parseStream2 = _interopRequireDefault(_parseStream); var _parser = require('./parser'); var _parser2 = _interopRequireDefault(_parser); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } module.exports = { LineStream: _lineStream2['default'], ParseStream: _parseStream2['default'], Parser: _parser2['default'] }; /** * @file m3u8/index.js * * Utilities for parsing M3U8 files. If the entire manifest is available, * `Parser` will create an object representation with enough detail for managing * playback. `ParseStream` and `LineStream` are lower-level parsing primitives * that do not assume the entirety of the manifest is ready and expose a * ReadableStream-like interface. */ },{"./line-stream":32,"./parse-stream":33,"./parser":34}],32:[function(require,module,exports){ 'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); var _stream = require('./stream'); var _stream2 = _interopRequireDefault(_stream); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; } function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /** * @file m3u8/line-stream.js */ /** * A stream that buffers string input and generates a `data` event for each * line. * * @class LineStream * @extends Stream */ var LineStream = function (_Stream) { _inherits(LineStream, _Stream); function LineStream() { _classCallCheck(this, LineStream); var _this = _possibleConstructorReturn(this, (LineStream.__proto__ || Object.getPrototypeOf(LineStream)).call(this)); _this.buffer = ''; return _this; } /** * Add new data to be parsed. * * @param {String} data the text to process */ _createClass(LineStream, [{ key: 'push', value: function push(data) { var nextNewline = void 0; this.buffer += data; nextNewline = this.buffer.indexOf('\n'); for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\n')) { this.trigger('data', this.buffer.substring(0, nextNewline)); this.buffer = this.buffer.substring(nextNewline + 1); } } }]); return LineStream; }(_stream2['default']); exports['default'] = LineStream; },{"./stream":35}],33:[function(require,module,exports){ 'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }(); var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); var _stream = require('./stream'); var _stream2 = _interopRequireDefault(_stream); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; } function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /** * @file m3u8/parse-stream.js */ /** * "forgiving" attribute list psuedo-grammar: * attributes -> keyvalue (',' keyvalue)* * keyvalue -> key '=' value * key -> [^=]* * value -> '"' [^"]* '"' | [^,]* */ var attributeSeparator = function attributeSeparator() { var key = '[^=]*'; var value = '"[^"]*"|[^,]*'; var keyvalue = '(?:' + key + ')=(?:' + value + ')'; return new RegExp('(?:^|,)(' + keyvalue + ')'); }; /** * Parse attributes from a line given the seperator * * @param {String} attributes the attibute line to parse */ var parseAttributes = function parseAttributes(attributes) { // split the string using attributes as the separator var attrs = attributes.split(attributeSeparator()); var result = {}; var i = attrs.length; var attr = void 0; while (i--) { // filter out unmatched portions of the string if (attrs[i] === '') { continue; } // split the key and value attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value attr[0] = attr[0].replace(/^\s+|\s+$/g, ''); attr[1] = attr[1].replace(/^\s+|\s+$/g, ''); attr[1] = attr[1].replace(/^['"](.*)['"]$/g, '$1'); result[attr[0]] = attr[1]; } return result; }; /** * A line-level M3U8 parser event stream. It expects to receive input one * line at a time and performs a context-free parse of its contents. A stream * interpretation of a manifest can be useful if the manifest is expected to * be too large to fit comfortably into memory or the entirety of the input * is not immediately available. Otherwise, it's probably much easier to work * with a regular `Parser` object. * * Produces `data` events with an object that captures the parser's * interpretation of the input. That object has a property `tag` that is one * of `uri`, `comment`, or `tag`. URIs only have a single additional * property, `line`, which captures the entirety of the input without * interpretation. Comments similarly have a single additional property * `text` which is the input without the leading `#`. * * Tags always have a property `tagType` which is the lower-cased version of * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance, * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized * tags are given the tag type `unknown` and a single additional property * `data` with the remainder of the input. * * @class ParseStream * @extends Stream */ var ParseStream = function (_Stream) { _inherits(ParseStream, _Stream); function ParseStream() { _classCallCheck(this, ParseStream); return _possibleConstructorReturn(this, (ParseStream.__proto__ || Object.getPrototypeOf(ParseStream)).call(this)); } /** * Parses an additional line of input. * * @param {String} line a single line of an M3U8 file to parse */ _createClass(ParseStream, [{ key: 'push', value: function push(line) { var match = void 0; var event = void 0; // strip whitespace line = line.replace(/^[\u0000\s]+|[\u0000\s]+$/g, ''); if (line.length === 0) { // ignore empty lines return; } // URIs if (line[0] !== '#') { this.trigger('data', { type: 'uri', uri: line }); return; } // Comments if (line.indexOf('#EXT') !== 0) { this.trigger('data', { type: 'comment', text: line.slice(1) }); return; } // strip off any carriage returns here so the regex matching // doesn't have to account for them. line = line.replace('\r', ''); // Tags match = /^#EXTM3U/.exec(line); if (match) { this.trigger('data', { type: 'tag', tagType: 'm3u' }); return; } match = /^#EXTINF:?([0-9\.]*)?,?(.*)?$/.exec(line); if (match) { event = { type: 'tag', tagType: 'inf' }; if (match[1]) { event.duration = parseFloat(match[1]); } if (match[2]) { event.title = match[2]; } this.trigger('data', event); return; } match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'targetduration' }; if (match[1]) { event.duration = parseInt(match[1], 10); } this.trigger('data', event); return; } match = /^#ZEN-TOTAL-DURATION:?([0-9.]*)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'totalduration' }; if (match[1]) { event.duration = parseInt(match[1], 10); } this.trigger('data', event); return; } match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'version' }; if (match[1]) { event.version = parseInt(match[1], 10); } this.trigger('data', event); return; } match = /^#EXT-X-MEDIA-SEQUENCE:?(\-?[0-9.]*)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'media-sequence' }; if (match[1]) { event.number = parseInt(match[1], 10); } this.trigger('data', event); return; } match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\-?[0-9.]*)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'discontinuity-sequence' }; if (match[1]) { event.number = parseInt(match[1], 10); } this.trigger('data', event); return; } match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(line); if (match) { event = { type: 'tag', tagType: 'playlist-type' }; if (match[1]) { event.playlistType = match[1]; } this.trigger('data', event); return; } match = /^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'byterange' }; if (match[1]) { event.length = parseInt(match[1], 10); } if (match[2]) { event.offset = parseInt(match[2], 10); } this.trigger('data', event); return; } match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(line); if (match) { event = { type: 'tag', tagType: 'allow-cache' }; if (match[1]) { event.allowed = !/NO/.test(match[1]); } this.trigger('data', event); return; } match = /^#EXT-X-MAP:?(.*)$/.exec(line); if (match) { event = { type: 'tag', tagType: 'map' }; if (match[1]) { var attributes = parseAttributes(match[1]); if (attributes.URI) { event.uri = attributes.URI; } if (attributes.BYTERANGE) { var _attributes$BYTERANGE = attributes.BYTERANGE.split('@'), _attributes$BYTERANGE2 = _slicedToArray(_attributes$BYTERANGE, 2), length = _attributes$BYTERANGE2[0], offset = _attributes$BYTERANGE2[1]; event.byterange = {}; if (length) { event.byterange.length = parseInt(length, 10); } if (offset) { event.byterange.offset = parseInt(offset, 10); } } } this.trigger('data', event); return; } match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(line); if (match) { event = { type: 'tag', tagType: 'stream-inf' }; if (match[1]) { event.attributes = parseAttributes(match[1]); if (event.attributes.RESOLUTION) { var split = event.attributes.RESOLUTION.split('x'); var resolution = {}; if (split[0]) { resolution.width = parseInt(split[0], 10); } if (split[1]) { resolution.height = parseInt(split[1], 10); } event.attributes.RESOLUTION = resolution; } if (event.attributes.BANDWIDTH) { event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10); } if (event.attributes['PROGRAM-ID']) { event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10); } } this.trigger('data', event); return; } match = /^#EXT-X-MEDIA:?(.*)$/.exec(line); if (match) { event = { type: 'tag', tagType: 'media' }; if (match[1]) { event.attributes = parseAttributes(match[1]); } this.trigger('data', event); return; } match = /^#EXT-X-ENDLIST/.exec(line); if (match) { this.trigger('data', { type: 'tag', tagType: 'endlist' }); return; } match = /^#EXT-X-DISCONTINUITY/.exec(line); if (match) { this.trigger('data', { type: 'tag', tagType: 'discontinuity' }); return; } match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(line); if (match) { event = { type: 'tag', tagType: 'program-date-time' }; if (match[1]) { event.dateTimeString = match[1]; event.dateTimeObject = new Date(match[1]); } this.trigger('data', event); return; } match = /^#EXT-X-KEY:?(.*)$/.exec(line); if (match) { event = { type: 'tag', tagType: 'key' }; if (match[1]) { event.attributes = parseAttributes(match[1]); // parse the IV string into a Uint32Array if (event.attributes.IV) { if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') { event.attributes.IV = event.attributes.IV.substring(2); } event.attributes.IV = event.attributes.IV.match(/.{8}/g); event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16); event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16); event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16); event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16); event.attributes.IV = new Uint32Array(event.attributes.IV); } } this.trigger('data', event); return; } match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(line); if (match) { event = { type: 'tag', tagType: 'cue-out-cont' }; if (match[1]) { event.data = match[1]; } else { event.data = ''; } this.trigger('data', event); return; } match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(line); if (match) { event = { type: 'tag', tagType: 'cue-out' }; if (match[1]) { event.data = match[1]; } else { event.data = ''; } this.trigger('data', event); return; } match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(line); if (match) { event = { type: 'tag', tagType: 'cue-in' }; if (match[1]) { event.data = match[1]; } else { event.data = ''; } this.trigger('data', event); return; } // unknown tag type this.trigger('data', { type: 'tag', data: line.slice(4) }); } }]); return ParseStream; }(_stream2['default']); exports['default'] = ParseStream; },{"./stream":35}],34:[function(require,module,exports){ 'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); var _stream = require('./stream'); var _stream2 = _interopRequireDefault(_stream); var _lineStream = require('./line-stream'); var _lineStream2 = _interopRequireDefault(_lineStream); var _parseStream = require('./parse-stream'); var _parseStream2 = _interopRequireDefault(_parseStream); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; } function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /** * @file m3u8/parser.js */ /** * A parser for M3U8 files. The current interpretation of the input is * exposed as a property `manifest` on parser objects. It's just two lines to * create and parse a manifest once you have the contents available as a string: * * ```js * var parser = new m3u8.Parser(); * parser.push(xhr.responseText); * ``` * * New input can later be applied to update the manifest object by calling * `push` again. * * The parser attempts to create a usable manifest object even if the * underlying input is somewhat nonsensical. It emits `info` and `warning` * events during the parse if it encounters input that seems invalid or * requires some property of the manifest object to be defaulted. * * @class Parser * @extends Stream */ var Parser = function (_Stream) { _inherits(Parser, _Stream); function Parser() { _classCallCheck(this, Parser); var _this = _possibleConstructorReturn(this, (Parser.__proto__ || Object.getPrototypeOf(Parser)).call(this)); _this.lineStream = new _lineStream2['default'](); _this.parseStream = new _parseStream2['default'](); _this.lineStream.pipe(_this.parseStream); /* eslint-disable consistent-this */ var self = _this; /* eslint-enable consistent-this */ var uris = []; var currentUri = {}; // if specified, the active EXT-X-MAP definition var currentMap = void 0; // if specified, the active decryption key var _key = void 0; var noop = function noop() {}; var defaultMediaGroups = { 'AUDIO': {}, 'VIDEO': {}, 'CLOSED-CAPTIONS': {}, 'SUBTITLES': {} }; // group segments into numbered timelines delineated by discontinuities var currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data _this.manifest = { allowCache: true, discontinuityStarts: [], segments: [] }; // update the manifest with the m3u8 entry from the parse stream _this.parseStream.on('data', function (entry) { var mediaGroup = void 0; var rendition = void 0; ({ tag: function tag() { // switch based on the tag type (({ 'allow-cache': function allowCache() { this.manifest.allowCache = entry.allowed; if (!('allowed' in entry)) { this.trigger('info', { message: 'defaulting allowCache to YES' }); this.manifest.allowCache = true; } }, byterange: function byterange() { var byterange = {}; if ('length' in entry) { currentUri.byterange = byterange; byterange.length = entry.length; if (!('offset' in entry)) { this.trigger('info', { message: 'defaulting offset to zero' }); entry.offset = 0; } } if ('offset' in entry) { currentUri.byterange = byterange; byterange.offset = entry.offset; } }, endlist: function endlist() { this.manifest.endList = true; }, inf: function inf() { if (!('mediaSequence' in this.manifest)) { this.manifest.mediaSequence = 0; this.trigger('info', { message: 'defaulting media sequence to zero' }); } if (!('discontinuitySequence' in this.manifest)) { this.manifest.discontinuitySequence = 0; this.trigger('info', { message: 'defaulting discontinuity sequence to zero' }); } if (entry.duration > 0) { currentUri.duration = entry.duration; } if (entry.duration === 0) { currentUri.duration = 0.01; this.trigger('info', { message: 'updating zero segment duration to a small value' }); } this.manifest.segments = uris; }, key: function key() { if (!entry.attributes) { this.trigger('warn', { message: 'ignoring key declaration without attribute list' }); return; } // clear the active encryption key if (entry.attributes.METHOD === 'NONE') { _key = null; return; } if (!entry.attributes.URI) { this.trigger('warn', { message: 'ignoring key declaration without URI' }); return; } if (!entry.attributes.METHOD) { this.trigger('warn', { message: 'defaulting key method to AES-128' }); } // setup an encryption key for upcoming segments _key = { method: entry.attributes.METHOD || 'AES-128', uri: entry.attributes.URI }; if (typeof entry.attributes.IV !== 'undefined') { _key.iv = entry.attributes.IV; } }, 'media-sequence': function mediaSequence() { if (!isFinite(entry.number)) { this.trigger('warn', { message: 'ignoring invalid media sequence: ' + entry.number }); return; } this.manifest.mediaSequence = entry.number; }, 'discontinuity-sequence': function discontinuitySequence() { if (!isFinite(entry.number)) { this.trigger('warn', { message: 'ignoring invalid discontinuity sequence: ' + entry.number }); return; } this.manifest.discontinuitySequence = entry.number; currentTimeline = entry.number; }, 'playlist-type': function playlistType() { if (!/VOD|EVENT/.test(entry.playlistType)) { this.trigger('warn', { message: 'ignoring unknown playlist type: ' + entry.playlist }); return; } this.manifest.playlistType = entry.playlistType; }, map: function map() { currentMap = {}; if (entry.uri) { currentMap.uri = entry.uri; } if (entry.byterange) { currentMap.byterange = entry.byterange; } }, 'stream-inf': function streamInf() { this.manifest.playlists = uris; this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups; if (!entry.attributes) { this.trigger('warn', { message: 'ignoring empty stream-inf attributes' }); return; } if (!currentUri.attributes) { currentUri.attributes = {}; } _extends(currentUri.attributes, entry.attributes); }, media: function media() { this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups; if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) { this.trigger('warn', { message: 'ignoring incomplete or missing media group' }); return; } // find the media group, creating defaults as necessary var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE]; mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {}; mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata rendition = { 'default': /yes/i.test(entry.attributes.DEFAULT) }; if (rendition['default']) { rendition.autoselect = true; } else { rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT); } if (entry.attributes.LANGUAGE) { rendition.language = entry.attributes.LANGUAGE; } if (entry.attributes.URI) { rendition.uri = entry.attributes.URI; } if (entry.attributes['INSTREAM-ID']) { rendition.instreamId = entry.attributes['INSTREAM-ID']; } if (entry.attributes.CHARACTERISTICS) { rendition.characteristics = entry.attributes.CHARACTERISTICS; } if (entry.attributes.FORCED) { rendition.forced = /yes/i.test(entry.attributes.FORCED); } // insert the new rendition mediaGroup[entry.attributes.NAME] = rendition; }, discontinuity: function discontinuity() { currentTimeline += 1; currentUri.discontinuity = true; this.manifest.discontinuityStarts.push(uris.length); }, 'program-date-time': function programDateTime() { this.manifest.dateTimeString = entry.dateTimeString; this.manifest.dateTimeObject = entry.dateTimeObject; }, targetduration: function targetduration() { if (!isFinite(entry.duration) || entry.duration < 0) { this.trigger('warn', { message: 'ignoring invalid target duration: ' + entry.duration }); return; } this.manifest.targetDuration = entry.duration; }, totalduration: function totalduration() { if (!isFinite(entry.duration) || entry.duration < 0) { this.trigger('warn', { message: 'ignoring invalid total duration: ' + entry.duration }); return; } this.manifest.totalDuration = entry.duration; }, 'cue-out': function cueOut() { currentUri.cueOut = entry.data; }, 'cue-out-cont': function cueOutCont() { currentUri.cueOutCont = entry.data; }, 'cue-in': function cueIn() { currentUri.cueIn = entry.data; } })[entry.tagType] || noop).call(self); }, uri: function uri() { currentUri.uri = entry.uri; uris.push(currentUri); // if no explicit duration was declared, use the target duration if (this.manifest.targetDuration && !('duration' in currentUri)) { this.trigger('warn', { message: 'defaulting segment duration to the target duration' }); currentUri.duration = this.manifest.targetDuration; } // annotate with encryption information, if necessary if (_key) { currentUri.key = _key; } currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary if (currentMap) { currentUri.map = currentMap; } // prepare for the next URI currentUri = {}; }, comment: function comment() { // comments are not important for playback } })[entry.type].call(self); }); return _this; } /** * Parse the input string and update the manifest object. * * @param {String} chunk a potentially incomplete portion of the manifest */ _createClass(Parser, [{ key: 'push', value: function push(chunk) { this.lineStream.push(chunk); } /** * Flush any remaining input. This can be handy if the last line of an M3U8 * manifest did not contain a trailing newline but the file has been * completely received. */ }, { key: 'end', value: function end() { // flush any buffered input this.lineStream.push('\n'); } }]); return Parser; }(_stream2['default']); exports['default'] = Parser; },{"./line-stream":32,"./parse-stream":33,"./stream":35}],35:[function(require,module,exports){ 'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } /** * @file stream.js */ /** * A lightweight readable stream implemention that handles event dispatching. * * @class Stream */ var Stream = function () { function Stream() { _classCallCheck(this, Stream); this.listeners = {}; } /** * Add a listener for a specified event type. * * @param {String} type the event name * @param {Function} listener the callback to be invoked when an event of * the specified type occurs */ _createClass(Stream, [{ key: 'on', value: function on(type, listener) { if (!this.listeners[type]) { this.listeners[type] = []; } this.listeners[type].push(listener); } /** * Remove a listener for a specified event type. * * @param {String} type the event name * @param {Function} listener a function previously registered for this * type of event through `on` * @return {Boolean} if we could turn it off or not */ }, { key: 'off', value: function off(type, listener) { if (!this.listeners[type]) { return false; } var index = this.listeners[type].indexOf(listener); this.listeners[type].splice(index, 1); return index > -1; } /** * Trigger an event of the specified type on this stream. Any additional * arguments to this function are passed as parameters to event listeners. * * @param {String} type the event name */ }, { key: 'trigger', value: function trigger(type) { var callbacks = this.listeners[type]; var i = void 0; var length = void 0; var args = void 0; if (!callbacks) { return; } // Slicing the arguments on every invocation of this method // can add a significant amount of overhead. Avoid the // intermediate object creation for the common case of a // single callback argument if (arguments.length === 2) { length = callbacks.length; for (i = 0; i < length; ++i) { callbacks[i].call(this, arguments[1]); } } else { args = Array.prototype.slice.call(arguments, 1); length = callbacks.length; for (i = 0; i < length; ++i) { callbacks[i].apply(this, args); } } } /** * Destroys the stream and cleans up. */ }, { key: 'dispose', value: function dispose() { this.listeners = {}; } /** * Forwards all `data` events on this stream to the destination stream. The * destination stream should provide a method `push` to receive the data * events as they arrive. * * @param {Stream} destination the stream that will receive all `data` events * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options */ }, { key: 'pipe', value: function pipe(destination) { this.on('data', function (data) { destination.push(data); }); } }]); return Stream; }(); exports['default'] = Stream; },{}],36:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2016 Brightcove * All rights reserved. * * A stream-based aac to mp4 converter. This utility can be used to * deliver mp4s to a SourceBuffer on platforms that support native * Media Source Extensions. */ 'use strict'; var Stream = require('../utils/stream.js'); // Constants var AacStream; /** * Splits an incoming stream of binary data into ADTS and ID3 Frames. */ AacStream = function() { var everything = new Uint8Array(), timeStamp = 0; AacStream.prototype.init.call(this); this.setTimestamp = function(timestamp) { timeStamp = timestamp; }; this.parseId3TagSize = function(header, byteIndex) { var returnSize = (header[byteIndex + 6] << 21) | (header[byteIndex + 7] << 14) | (header[byteIndex + 8] << 7) | (header[byteIndex + 9]), flags = header[byteIndex + 5], footerPresent = (flags & 16) >> 4; if (footerPresent) { return returnSize + 20; } return returnSize + 10; }; this.parseAdtsSize = function(header, byteIndex) { var lowThree = (header[byteIndex + 5] & 0xE0) >> 5, middle = header[byteIndex + 4] << 3, highTwo = header[byteIndex + 3] & 0x3 << 11; return (highTwo | middle) | lowThree; }; this.push = function(bytes) { var frameSize = 0, byteIndex = 0, bytesLeft, chunk, packet, tempLength; // If there are bytes remaining from the last segment, prepend them to the // bytes that were pushed in if (everything.length) { tempLength = everything.length; everything = new Uint8Array(bytes.byteLength + tempLength); everything.set(everything.subarray(0, tempLength)); everything.set(bytes, tempLength); } else { everything = bytes; } while (everything.length - byteIndex >= 3) { if ((everything[byteIndex] === 'I'.charCodeAt(0)) && (everything[byteIndex + 1] === 'D'.charCodeAt(0)) && (everything[byteIndex + 2] === '3'.charCodeAt(0))) { // Exit early because we don't have enough to parse // the ID3 tag header if (everything.length - byteIndex < 10) { break; } // check framesize frameSize = this.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer // to emit a full packet if (frameSize > everything.length) { break; } chunk = { type: 'timed-metadata', data: everything.subarray(byteIndex, byteIndex + frameSize) }; this.trigger('data', chunk); byteIndex += frameSize; continue; } else if ((everything[byteIndex] & 0xff === 0xff) && ((everything[byteIndex + 1] & 0xf0) === 0xf0)) { // Exit early because we don't have enough to parse // the ADTS frame header if (everything.length - byteIndex < 7) { break; } frameSize = this.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer // to emit a full packet if (frameSize > everything.length) { break; } packet = { type: 'audio', data: everything.subarray(byteIndex, byteIndex + frameSize), pts: timeStamp, dts: timeStamp }; this.trigger('data', packet); byteIndex += frameSize; continue; } byteIndex++; } bytesLeft = everything.length - byteIndex; if (bytesLeft > 0) { everything = everything.subarray(byteIndex); } else { everything = new Uint8Array(); } }; }; AacStream.prototype = new Stream(); module.exports = AacStream; },{"../utils/stream.js":60}],37:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2016 Brightcove * All rights reserved. * * Utilities to detect basic properties and metadata about Aac data. */ 'use strict'; var ADTS_SAMPLING_FREQUENCIES = [ 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350 ]; var parseSyncSafeInteger = function(data) { return (data[0] << 21) | (data[1] << 14) | (data[2] << 7) | (data[3]); }; // return a percent-encoded representation of the specified byte range // @see http://en.wikipedia.org/wiki/Percent-encoding var percentEncode = function(bytes, start, end) { var i, result = ''; for (i = start; i < end; i++) { result += '%' + ('00' + bytes[i].toString(16)).slice(-2); } return result; }; // return the string representation of the specified byte range, // interpreted as ISO-8859-1. var parseIso88591 = function(bytes, start, end) { return unescape(percentEncode(bytes, start, end)); // jshint ignore:line }; var parseId3TagSize = function(header, byteIndex) { var returnSize = (header[byteIndex + 6] << 21) | (header[byteIndex + 7] << 14) | (header[byteIndex + 8] << 7) | (header[byteIndex + 9]), flags = header[byteIndex + 5], footerPresent = (flags & 16) >> 4; if (footerPresent) { return returnSize + 20; } return returnSize + 10; }; var parseAdtsSize = function(header, byteIndex) { var lowThree = (header[byteIndex + 5] & 0xE0) >> 5, middle = header[byteIndex + 4] << 3, highTwo = header[byteIndex + 3] & 0x3 << 11; return (highTwo | middle) | lowThree; }; var parseType = function(header, byteIndex) { if ((header[byteIndex] === 'I'.charCodeAt(0)) && (header[byteIndex + 1] === 'D'.charCodeAt(0)) && (header[byteIndex + 2] === '3'.charCodeAt(0))) { return 'timed-metadata'; } else if ((header[byteIndex] & 0xff === 0xff) && ((header[byteIndex + 1] & 0xf0) === 0xf0)) { return 'audio'; } return null; }; var parseSampleRate = function(packet) { var i = 0; while (i + 5 < packet.length) { if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) { // If a valid header was not found, jump one forward and attempt to // find a valid ADTS header starting at the next byte i++; continue; } return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2]; } return null; }; var parseAacTimestamp = function(packet) { var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag frameStart = 10; if (packet[5] & 0x40) { // advance the frame start past the extended header frameStart += 4; // header size field frameStart += parseSyncSafeInteger(packet.subarray(10, 14)); } // parse one or more ID3 frames // http://id3.org/id3v2.3.0#ID3v2_frame_overview do { // determine the number of bytes in this frame frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8)); if (frameSize < 1) { return null; } frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]); if (frameHeader === 'PRIV') { frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10); for (var i = 0; i < frame.byteLength; i++) { if (frame[i] === 0) { var owner = parseIso88591(frame, 0, i); if (owner === 'com.apple.streaming.transportStreamTimestamp') { var d = frame.subarray(i + 1); var size = ((d[3] & 0x01) << 30) | (d[4] << 22) | (d[5] << 14) | (d[6] << 6) | (d[7] >>> 2); size *= 4; size += d[7] & 0x03; return size; } break; } } } frameStart += 10; // advance past the frame header frameStart += frameSize; // advance past the frame body } while (frameStart < packet.byteLength); return null; }; module.exports = { parseId3TagSize: parseId3TagSize, parseAdtsSize: parseAdtsSize, parseType: parseType, parseSampleRate: parseSampleRate, parseAacTimestamp: parseAacTimestamp }; },{}],38:[function(require,module,exports){ 'use strict'; var Stream = require('../utils/stream.js'); var AdtsStream; var ADTS_SAMPLING_FREQUENCIES = [ 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350 ]; /* * Accepts a ElementaryStream and emits data events with parsed * AAC Audio Frames of the individual packets. Input audio in ADTS * format is unpacked and re-emitted as AAC frames. * * @see http://wiki.multimedia.cx/index.php?title=ADTS * @see http://wiki.multimedia.cx/?title=Understanding_AAC */ AdtsStream = function() { var buffer; AdtsStream.prototype.init.call(this); this.push = function(packet) { var i = 0, frameNum = 0, frameLength, protectionSkipBytes, frameEnd, oldBuffer, sampleCount, adtsFrameDuration; if (packet.type !== 'audio') { // ignore non-audio data return; } // Prepend any data in the buffer to the input data so that we can parse // aac frames the cross a PES packet boundary if (buffer) { oldBuffer = buffer; buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength); buffer.set(oldBuffer); buffer.set(packet.data, oldBuffer.byteLength); } else { buffer = packet.data; } // unpack any ADTS frames which have been fully received // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS while (i + 5 < buffer.length) { // Loook for the start of an ADTS header.. if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) { // If a valid header was not found, jump one forward and attempt to // find a valid ADTS header starting at the next byte i++; continue; } // The protection skip bit tells us if we have 2 bytes of CRC data at the // end of the ADTS header protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the // end of the sync sequence frameLength = ((buffer[i + 3] & 0x03) << 11) | (buffer[i + 4] << 3) | ((buffer[i + 5] & 0xe0) >> 5); sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024; adtsFrameDuration = (sampleCount * 90000) / ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2]; frameEnd = i + frameLength; // If we don't have enough data to actually finish this ADTS frame, return // and wait for more data if (buffer.byteLength < frameEnd) { return; } // Otherwise, deliver the complete AAC frame this.trigger('data', { pts: packet.pts + (frameNum * adtsFrameDuration), dts: packet.dts + (frameNum * adtsFrameDuration), sampleCount: sampleCount, audioobjecttype: ((buffer[i + 2] >>> 6) & 0x03) + 1, channelcount: ((buffer[i + 2] & 1) << 2) | ((buffer[i + 3] & 0xc0) >>> 6), samplerate: ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2], samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2, // assume ISO/IEC 14496-12 AudioSampleEntry default of 16 samplesize: 16, data: buffer.subarray(i + 7 + protectionSkipBytes, frameEnd) }); // If the buffer is empty, clear it and return if (buffer.byteLength === frameEnd) { buffer = undefined; return; } frameNum++; // Remove the finished frame from the buffer and start the process again buffer = buffer.subarray(frameEnd); } }; this.flush = function() { this.trigger('done'); }; }; AdtsStream.prototype = new Stream(); module.exports = AdtsStream; },{"../utils/stream.js":60}],39:[function(require,module,exports){ 'use strict'; var Stream = require('../utils/stream.js'); var ExpGolomb = require('../utils/exp-golomb.js'); var H264Stream, NalByteStream; var PROFILES_WITH_OPTIONAL_SPS_DATA; /** * Accepts a NAL unit byte stream and unpacks the embedded NAL units. */ NalByteStream = function() { var syncPoint = 0, i, buffer; NalByteStream.prototype.init.call(this); this.push = function(data) { var swapBuffer; if (!buffer) { buffer = data.data; } else { swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength); swapBuffer.set(buffer); swapBuffer.set(data.data, buffer.byteLength); buffer = swapBuffer; } // Rec. ITU-T H.264, Annex B // scan for NAL unit boundaries // a match looks like this: // 0 0 1 .. NAL .. 0 0 1 // ^ sync point ^ i // or this: // 0 0 1 .. NAL .. 0 0 0 // ^ sync point ^ i // advance the sync point to a NAL start, if necessary for (; syncPoint < buffer.byteLength - 3; syncPoint++) { if (buffer[syncPoint + 2] === 1) { // the sync point is properly aligned i = syncPoint + 5; break; } } while (i < buffer.byteLength) { // look at the current byte to determine if we've hit the end of // a NAL unit boundary switch (buffer[i]) { case 0: // skip past non-sync sequences if (buffer[i - 1] !== 0) { i += 2; break; } else if (buffer[i - 2] !== 0) { i++; break; } // deliver the NAL unit if it isn't empty if (syncPoint + 3 !== i - 2) { this.trigger('data', buffer.subarray(syncPoint + 3, i - 2)); } // drop trailing zeroes do { i++; } while (buffer[i] !== 1 && i < buffer.length); syncPoint = i - 2; i += 3; break; case 1: // skip past non-sync sequences if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) { i += 3; break; } // deliver the NAL unit this.trigger('data', buffer.subarray(syncPoint + 3, i - 2)); syncPoint = i - 2; i += 3; break; default: // the current byte isn't a one or zero, so it cannot be part // of a sync sequence i += 3; break; } } // filter out the NAL units that were delivered buffer = buffer.subarray(syncPoint); i -= syncPoint; syncPoint = 0; }; this.flush = function() { // deliver the last buffered NAL unit if (buffer && buffer.byteLength > 3) { this.trigger('data', buffer.subarray(syncPoint + 3)); } // reset the stream state buffer = null; syncPoint = 0; this.trigger('done'); }; }; NalByteStream.prototype = new Stream(); // values of profile_idc that indicate additional fields are included in the SPS // see Recommendation ITU-T H.264 (4/2013), // 7.3.2.1.1 Sequence parameter set data syntax PROFILES_WITH_OPTIONAL_SPS_DATA = { 100: true, 110: true, 122: true, 244: true, 44: true, 83: true, 86: true, 118: true, 128: true, 138: true, 139: true, 134: true }; /** * Accepts input from a ElementaryStream and produces H.264 NAL unit data * events. */ H264Stream = function() { var nalByteStream = new NalByteStream(), self, trackId, currentPts, currentDts, discardEmulationPreventionBytes, readSequenceParameterSet, skipScalingList; H264Stream.prototype.init.call(this); self = this; this.push = function(packet) { if (packet.type !== 'video') { return; } trackId = packet.trackId; currentPts = packet.pts; currentDts = packet.dts; nalByteStream.push(packet); }; nalByteStream.on('data', function(data) { var event = { trackId: trackId, pts: currentPts, dts: currentDts, data: data }; switch (data[0] & 0x1f) { case 0x05: event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr'; break; case 0x06: event.nalUnitType = 'sei_rbsp'; event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1)); break; case 0x07: event.nalUnitType = 'seq_parameter_set_rbsp'; event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1)); event.config = readSequenceParameterSet(event.escapedRBSP); break; case 0x08: event.nalUnitType = 'pic_parameter_set_rbsp'; break; case 0x09: event.nalUnitType = 'access_unit_delimiter_rbsp'; break; default: break; } self.trigger('data', event); }); nalByteStream.on('done', function() { self.trigger('done'); }); this.flush = function() { nalByteStream.flush(); }; /** * Advance the ExpGolomb decoder past a scaling list. The scaling * list is optionally transmitted as part of a sequence parameter * set and is not relevant to transmuxing. * @param count {number} the number of entries in this scaling list * @param expGolombDecoder {object} an ExpGolomb pointed to the * start of a scaling list * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1 */ skipScalingList = function(count, expGolombDecoder) { var lastScale = 8, nextScale = 8, j, deltaScale; for (j = 0; j < count; j++) { if (nextScale !== 0) { deltaScale = expGolombDecoder.readExpGolomb(); nextScale = (lastScale + deltaScale + 256) % 256; } lastScale = (nextScale === 0) ? lastScale : nextScale; } }; /** * Expunge any "Emulation Prevention" bytes from a "Raw Byte * Sequence Payload" * @param data {Uint8Array} the bytes of a RBSP from a NAL * unit * @return {Uint8Array} the RBSP without any Emulation * Prevention Bytes */ discardEmulationPreventionBytes = function(data) { var length = data.byteLength, emulationPreventionBytesPositions = [], i = 1, newLength, newData; // Find all `Emulation Prevention Bytes` while (i < length - 2) { if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) { emulationPreventionBytesPositions.push(i + 2); i += 2; } else { i++; } } // If no Emulation Prevention Bytes were found just return the original // array if (emulationPreventionBytesPositions.length === 0) { return data; } // Create a new array to hold the NAL unit data newLength = length - emulationPreventionBytesPositions.length; newData = new Uint8Array(newLength); var sourceIndex = 0; for (i = 0; i < newLength; sourceIndex++, i++) { if (sourceIndex === emulationPreventionBytesPositions[0]) { // Skip this byte sourceIndex++; // Remove this position index emulationPreventionBytesPositions.shift(); } newData[i] = data[sourceIndex]; } return newData; }; /** * Read a sequence parameter set and return some interesting video * properties. A sequence parameter set is the H264 metadata that * describes the properties of upcoming video frames. * @param data {Uint8Array} the bytes of a sequence parameter set * @return {object} an object with configuration parsed from the * sequence parameter set, including the dimensions of the * associated video frames. */ readSequenceParameterSet = function(data) { var frameCropLeftOffset = 0, frameCropRightOffset = 0, frameCropTopOffset = 0, frameCropBottomOffset = 0, sarScale = 1, expGolombDecoder, profileIdc, levelIdc, profileCompatibility, chromaFormatIdc, picOrderCntType, numRefFramesInPicOrderCntCycle, picWidthInMbsMinus1, picHeightInMapUnitsMinus1, frameMbsOnlyFlag, scalingListCount, sarRatio, aspectRatioIdc, i; expGolombDecoder = new ExpGolomb(data); profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8) expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id // some profiles have more optional data we don't need if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) { chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb(); if (chromaFormatIdc === 3) { expGolombDecoder.skipBits(1); // separate_colour_plane_flag } expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8 expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8 expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag if (expGolombDecoder.readBoolean()) { // seq_scaling_matrix_present_flag scalingListCount = (chromaFormatIdc !== 3) ? 8 : 12; for (i = 0; i < scalingListCount; i++) { if (expGolombDecoder.readBoolean()) { // seq_scaling_list_present_flag[ i ] if (i < 6) { skipScalingList(16, expGolombDecoder); } else { skipScalingList(64, expGolombDecoder); } } } } } expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4 picOrderCntType = expGolombDecoder.readUnsignedExpGolomb(); if (picOrderCntType === 0) { expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4 } else if (picOrderCntType === 1) { expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb(); for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) { expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ] } } expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb(); picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb(); frameMbsOnlyFlag = expGolombDecoder.readBits(1); if (frameMbsOnlyFlag === 0) { expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag } expGolombDecoder.skipBits(1); // direct_8x8_inference_flag if (expGolombDecoder.readBoolean()) { // frame_cropping_flag frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb(); frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb(); frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb(); frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb(); } if (expGolombDecoder.readBoolean()) { // vui_parameters_present_flag if (expGolombDecoder.readBoolean()) { // aspect_ratio_info_present_flag aspectRatioIdc = expGolombDecoder.readUnsignedByte(); switch (aspectRatioIdc) { case 1: sarRatio = [1, 1]; break; case 2: sarRatio = [12, 11]; break; case 3: sarRatio = [10, 11]; break; case 4: sarRatio = [16, 11]; break; case 5: sarRatio = [40, 33]; break; case 6: sarRatio = [24, 11]; break; case 7: sarRatio = [20, 11]; break; case 8: sarRatio = [32, 11]; break; case 9: sarRatio = [80, 33]; break; case 10: sarRatio = [18, 11]; break; case 11: sarRatio = [15, 11]; break; case 12: sarRatio = [64, 33]; break; case 13: sarRatio = [160, 99]; break; case 14: sarRatio = [4, 3]; break; case 15: sarRatio = [3, 2]; break; case 16: sarRatio = [2, 1]; break; case 255: { sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte() ]; break; } } if (sarRatio) { sarScale = sarRatio[0] / sarRatio[1]; } } } return { profileIdc: profileIdc, levelIdc: levelIdc, profileCompatibility: profileCompatibility, width: Math.ceil((((picWidthInMbsMinus1 + 1) * 16) - frameCropLeftOffset * 2 - frameCropRightOffset * 2) * sarScale), height: ((2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16) - (frameCropTopOffset * 2) - (frameCropBottomOffset * 2) }; }; }; H264Stream.prototype = new Stream(); module.exports = { H264Stream: H264Stream, NalByteStream: NalByteStream }; },{"../utils/exp-golomb.js":59,"../utils/stream.js":60}],40:[function(require,module,exports){ var highPrefix = [33, 16, 5, 32, 164, 27]; var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252]; var zeroFill = function(count) { var a = []; while (count--) { a.push(0); } return a; }; var makeTable = function(metaTable) { return Object.keys(metaTable).reduce(function(obj, key) { obj[key] = new Uint8Array(metaTable[key].reduce(function(arr, part) { return arr.concat(part); }, [])); return obj; }, {}); }; // Frames-of-silence to use for filling in missing AAC frames var coneOfSilence = { 96000: [highPrefix, [227, 64], zeroFill(154), [56]], 88200: [highPrefix, [231], zeroFill(170), [56]], 64000: [highPrefix, [248, 192], zeroFill(240), [56]], 48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]], 44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]], 32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]], 24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]], 16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]], 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]], 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]], 8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]] }; module.exports = makeTable(coneOfSilence); },{}],41:[function(require,module,exports){ 'use strict'; var Stream = require('../utils/stream.js'); /** * The final stage of the transmuxer that emits the flv tags * for audio, video, and metadata. Also tranlates in time and * outputs caption data and id3 cues. */ var CoalesceStream = function(options) { // Number of Tracks per output segment // If greater than 1, we combine multiple // tracks into a single segment this.numberOfTracks = 0; this.metadataStream = options.metadataStream; this.videoTags = []; this.audioTags = []; this.videoTrack = null; this.audioTrack = null; this.pendingCaptions = []; this.pendingMetadata = []; this.pendingTracks = 0; this.processedTracks = 0; CoalesceStream.prototype.init.call(this); // Take output from multiple this.push = function(output) { // buffer incoming captions until the associated video segment // finishes if (output.text) { return this.pendingCaptions.push(output); } // buffer incoming id3 tags until the final flush if (output.frames) { return this.pendingMetadata.push(output); } if (output.track.type === 'video') { this.videoTrack = output.track; this.videoTags = output.tags; this.pendingTracks++; } if (output.track.type === 'audio') { this.audioTrack = output.track; this.audioTags = output.tags; this.pendingTracks++; } }; }; CoalesceStream.prototype = new Stream(); CoalesceStream.prototype.flush = function(flushSource) { var id3, caption, i, timelineStartPts, event = { tags: {}, captions: [], metadata: [] }; if (this.pendingTracks < this.numberOfTracks) { if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') { // Return because we haven't received a flush from a data-generating // portion of the segment (meaning that we have only recieved meta-data // or captions.) return; } else if (this.pendingTracks === 0) { // In the case where we receive a flush without any data having been // received we consider it an emitted track for the purposes of coalescing // `done` events. // We do this for the case where there is an audio and video track in the // segment but no audio data. (seen in several playlists with alternate // audio tracks and no audio present in the main TS segments.) this.processedTracks++; if (this.processedTracks < this.numberOfTracks) { return; } } } this.processedTracks += this.pendingTracks; this.pendingTracks = 0; if (this.processedTracks < this.numberOfTracks) { return; } if (this.videoTrack) { timelineStartPts = this.videoTrack.timelineStartInfo.pts; } else if (this.audioTrack) { timelineStartPts = this.audioTrack.timelineStartInfo.pts; } event.tags.videoTags = this.videoTags; event.tags.audioTags = this.audioTags; // Translate caption PTS times into second offsets into the // video timeline for the segment for (i = 0; i < this.pendingCaptions.length; i++) { caption = this.pendingCaptions[i]; caption.startTime = caption.startPts - timelineStartPts; caption.startTime /= 90e3; caption.endTime = caption.endPts - timelineStartPts; caption.endTime /= 90e3; event.captions.push(caption); } // Translate ID3 frame PTS times into second offsets into the // video timeline for the segment for (i = 0; i < this.pendingMetadata.length; i++) { id3 = this.pendingMetadata[i]; id3.cueTime = id3.pts - timelineStartPts; id3.cueTime /= 90e3; event.metadata.push(id3); } // We add this to every single emitted segment even though we only need // it for the first event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state this.videoTrack = null; this.audioTrack = null; this.videoTags = []; this.audioTags = []; this.pendingCaptions.length = 0; this.pendingMetadata.length = 0; this.pendingTracks = 0; this.processedTracks = 0; // Emit the final segment this.trigger('data', event); this.trigger('done'); }; module.exports = CoalesceStream; },{"../utils/stream.js":60}],42:[function(require,module,exports){ 'use strict'; var FlvTag = require('./flv-tag.js'); // For information on the FLV format, see // http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf. // Technically, this function returns the header and a metadata FLV tag // if duration is greater than zero // duration in seconds // @return {object} the bytes of the FLV header as a Uint8Array var getFlvHeader = function(duration, audio, video) { // :ByteArray { var headBytes = new Uint8Array(3 + 1 + 1 + 4), head = new DataView(headBytes.buffer), metadata, result, metadataLength; // default arguments duration = duration || 0; audio = audio === undefined ? true : audio; video = video === undefined ? true : video; // signature head.setUint8(0, 0x46); // 'F' head.setUint8(1, 0x4c); // 'L' head.setUint8(2, 0x56); // 'V' // version head.setUint8(3, 0x01); // flags head.setUint8(4, (audio ? 0x04 : 0x00) | (video ? 0x01 : 0x00)); // data offset, should be 9 for FLV v1 head.setUint32(5, headBytes.byteLength); // init the first FLV tag if (duration <= 0) { // no duration available so just write the first field of the first // FLV tag result = new Uint8Array(headBytes.byteLength + 4); result.set(headBytes); result.set([0, 0, 0, 0], headBytes.byteLength); return result; } // write out the duration metadata tag metadata = new FlvTag(FlvTag.METADATA_TAG); metadata.pts = metadata.dts = 0; metadata.writeMetaDataDouble('duration', duration); metadataLength = metadata.finalize().length; result = new Uint8Array(headBytes.byteLength + metadataLength); result.set(headBytes); result.set(head.byteLength, metadataLength); return result; }; module.exports = getFlvHeader; },{"./flv-tag.js":43}],43:[function(require,module,exports){ /** * An object that stores the bytes of an FLV tag and methods for * querying and manipulating that data. * @see http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf */ 'use strict'; var FlvTag; // (type:uint, extraData:Boolean = false) extends ByteArray FlvTag = function(type, extraData) { var // Counter if this is a metadata tag, nal start marker if this is a video // tag. unused if this is an audio tag adHoc = 0, // :uint // The default size is 16kb but this is not enough to hold iframe // data and the resizing algorithm costs a bit so we create a larger // starting buffer for video tags bufferStartSize = 16384, // checks whether the FLV tag has enough capacity to accept the proposed // write and re-allocates the internal buffers if necessary prepareWrite = function(flv, count) { var bytes, minLength = flv.position + count; if (minLength < flv.bytes.byteLength) { // there's enough capacity so do nothing return; } // allocate a new buffer and copy over the data that will not be modified bytes = new Uint8Array(minLength * 2); bytes.set(flv.bytes.subarray(0, flv.position), 0); flv.bytes = bytes; flv.view = new DataView(flv.bytes.buffer); }, // commonly used metadata properties widthBytes = FlvTag.widthBytes || new Uint8Array('width'.length), heightBytes = FlvTag.heightBytes || new Uint8Array('height'.length), videocodecidBytes = FlvTag.videocodecidBytes || new Uint8Array('videocodecid'.length), i; if (!FlvTag.widthBytes) { // calculating the bytes of common metadata names ahead of time makes the // corresponding writes faster because we don't have to loop over the // characters // re-test with test/perf.html if you're planning on changing this for (i = 0; i < 'width'.length; i++) { widthBytes[i] = 'width'.charCodeAt(i); } for (i = 0; i < 'height'.length; i++) { heightBytes[i] = 'height'.charCodeAt(i); } for (i = 0; i < 'videocodecid'.length; i++) { videocodecidBytes[i] = 'videocodecid'.charCodeAt(i); } FlvTag.widthBytes = widthBytes; FlvTag.heightBytes = heightBytes; FlvTag.videocodecidBytes = videocodecidBytes; } this.keyFrame = false; // :Boolean switch (type) { case FlvTag.VIDEO_TAG: this.length = 16; // Start the buffer at 256k bufferStartSize *= 6; break; case FlvTag.AUDIO_TAG: this.length = 13; this.keyFrame = true; break; case FlvTag.METADATA_TAG: this.length = 29; this.keyFrame = true; break; default: throw new Error('Unknown FLV tag type'); } this.bytes = new Uint8Array(bufferStartSize); this.view = new DataView(this.bytes.buffer); this.bytes[0] = type; this.position = this.length; this.keyFrame = extraData; // Defaults to false // presentation timestamp this.pts = 0; // decoder timestamp this.dts = 0; // ByteArray#writeBytes(bytes:ByteArray, offset:uint = 0, length:uint = 0) this.writeBytes = function(bytes, offset, length) { var start = offset || 0, end; length = length || bytes.byteLength; end = start + length; prepareWrite(this, length); this.bytes.set(bytes.subarray(start, end), this.position); this.position += length; this.length = Math.max(this.length, this.position); }; // ByteArray#writeByte(value:int):void this.writeByte = function(byte) { prepareWrite(this, 1); this.bytes[this.position] = byte; this.position++; this.length = Math.max(this.length, this.position); }; // ByteArray#writeShort(value:int):void this.writeShort = function(short) { prepareWrite(this, 2); this.view.setUint16(this.position, short); this.position += 2; this.length = Math.max(this.length, this.position); }; // Negative index into array // (pos:uint):int this.negIndex = function(pos) { return this.bytes[this.length - pos]; }; // The functions below ONLY work when this[0] == VIDEO_TAG. // We are not going to check for that because we dont want the overhead // (nal:ByteArray = null):int this.nalUnitSize = function() { if (adHoc === 0) { return 0; } return this.length - (adHoc + 4); }; this.startNalUnit = function() { // remember position and add 4 bytes if (adHoc > 0) { throw new Error('Attempted to create new NAL wihout closing the old one'); } // reserve 4 bytes for nal unit size adHoc = this.length; this.length += 4; this.position = this.length; }; // (nal:ByteArray = null):void this.endNalUnit = function(nalContainer) { var nalStart, // :uint nalLength; // :uint // Rewind to the marker and write the size if (this.length === adHoc + 4) { // we started a nal unit, but didnt write one, so roll back the 4 byte size value this.length -= 4; } else if (adHoc > 0) { nalStart = adHoc + 4; nalLength = this.length - nalStart; this.position = adHoc; this.view.setUint32(this.position, nalLength); this.position = this.length; if (nalContainer) { // Add the tag to the NAL unit nalContainer.push(this.bytes.subarray(nalStart, nalStart + nalLength)); } } adHoc = 0; }; /** * Write out a 64-bit floating point valued metadata property. This method is * called frequently during a typical parse and needs to be fast. */ // (key:String, val:Number):void this.writeMetaDataDouble = function(key, val) { var i; prepareWrite(this, 2 + key.length + 9); // write size of property name this.view.setUint16(this.position, key.length); this.position += 2; // this next part looks terrible but it improves parser throughput by // 10kB/s in my testing // write property name if (key === 'width') { this.bytes.set(widthBytes, this.position); this.position += 5; } else if (key === 'height') { this.bytes.set(heightBytes, this.position); this.position += 6; } else if (key === 'videocodecid') { this.bytes.set(videocodecidBytes, this.position); this.position += 12; } else { for (i = 0; i < key.length; i++) { this.bytes[this.position] = key.charCodeAt(i); this.position++; } } // skip null byte this.position++; // write property value this.view.setFloat64(this.position, val); this.position += 8; // update flv tag length this.length = Math.max(this.length, this.position); ++adHoc; }; // (key:String, val:Boolean):void this.writeMetaDataBoolean = function(key, val) { var i; prepareWrite(this, 2); this.view.setUint16(this.position, key.length); this.position += 2; for (i = 0; i < key.length; i++) { // if key.charCodeAt(i) >= 255, handle error prepareWrite(this, 1); this.bytes[this.position] = key.charCodeAt(i); this.position++; } prepareWrite(this, 2); this.view.setUint8(this.position, 0x01); this.position++; this.view.setUint8(this.position, val ? 0x01 : 0x00); this.position++; this.length = Math.max(this.length, this.position); ++adHoc; }; // ():ByteArray this.finalize = function() { var dtsDelta, // :int len; // :int switch (this.bytes[0]) { // Video Data case FlvTag.VIDEO_TAG: // We only support AVC, 1 = key frame (for AVC, a seekable // frame), 2 = inter frame (for AVC, a non-seekable frame) this.bytes[11] = ((this.keyFrame || extraData) ? 0x10 : 0x20) | 0x07; this.bytes[12] = extraData ? 0x00 : 0x01; dtsDelta = this.pts - this.dts; this.bytes[13] = (dtsDelta & 0x00FF0000) >>> 16; this.bytes[14] = (dtsDelta & 0x0000FF00) >>> 8; this.bytes[15] = (dtsDelta & 0x000000FF) >>> 0; break; case FlvTag.AUDIO_TAG: this.bytes[11] = 0xAF; // 44 kHz, 16-bit stereo this.bytes[12] = extraData ? 0x00 : 0x01; break; case FlvTag.METADATA_TAG: this.position = 11; this.view.setUint8(this.position, 0x02); // String type this.position++; this.view.setUint16(this.position, 0x0A); // 10 Bytes this.position += 2; // set "onMetaData" this.bytes.set([0x6f, 0x6e, 0x4d, 0x65, 0x74, 0x61, 0x44, 0x61, 0x74, 0x61], this.position); this.position += 10; this.bytes[this.position] = 0x08; // Array type this.position++; this.view.setUint32(this.position, adHoc); this.position = this.length; this.bytes.set([0, 0, 9], this.position); this.position += 3; // End Data Tag this.length = this.position; break; } len = this.length - 11; // write the DataSize field this.bytes[ 1] = (len & 0x00FF0000) >>> 16; this.bytes[ 2] = (len & 0x0000FF00) >>> 8; this.bytes[ 3] = (len & 0x000000FF) >>> 0; // write the Timestamp this.bytes[ 4] = (this.dts & 0x00FF0000) >>> 16; this.bytes[ 5] = (this.dts & 0x0000FF00) >>> 8; this.bytes[ 6] = (this.dts & 0x000000FF) >>> 0; this.bytes[ 7] = (this.dts & 0xFF000000) >>> 24; // write the StreamID this.bytes[ 8] = 0; this.bytes[ 9] = 0; this.bytes[10] = 0; // Sometimes we're at the end of the view and have one slot to write a // uint32, so, prepareWrite of count 4, since, view is uint8 prepareWrite(this, 4); this.view.setUint32(this.length, this.length); this.length += 4; this.position += 4; // trim down the byte buffer to what is actually being used this.bytes = this.bytes.subarray(0, this.length); this.frameTime = FlvTag.frameTime(this.bytes); // if bytes.bytelength isn't equal to this.length, handle error return this; }; }; FlvTag.AUDIO_TAG = 0x08; // == 8, :uint FlvTag.VIDEO_TAG = 0x09; // == 9, :uint FlvTag.METADATA_TAG = 0x12; // == 18, :uint // (tag:ByteArray):Boolean { FlvTag.isAudioFrame = function(tag) { return FlvTag.AUDIO_TAG === tag[0]; }; // (tag:ByteArray):Boolean { FlvTag.isVideoFrame = function(tag) { return FlvTag.VIDEO_TAG === tag[0]; }; // (tag:ByteArray):Boolean { FlvTag.isMetaData = function(tag) { return FlvTag.METADATA_TAG === tag[0]; }; // (tag:ByteArray):Boolean { FlvTag.isKeyFrame = function(tag) { if (FlvTag.isVideoFrame(tag)) { return tag[11] === 0x17; } if (FlvTag.isAudioFrame(tag)) { return true; } if (FlvTag.isMetaData(tag)) { return true; } return false; }; // (tag:ByteArray):uint { FlvTag.frameTime = function(tag) { var pts = tag[ 4] << 16; // :uint pts |= tag[ 5] << 8; pts |= tag[ 6] << 0; pts |= tag[ 7] << 24; return pts; }; module.exports = FlvTag; },{}],44:[function(require,module,exports){ module.exports = { tag: require('./flv-tag'), Transmuxer: require('./transmuxer'), getFlvHeader: require('./flv-header') }; },{"./flv-header":42,"./flv-tag":43,"./transmuxer":46}],45:[function(require,module,exports){ 'use strict'; var TagList = function() { var self = this; this.list = []; this.push = function(tag) { this.list.push({ bytes: tag.bytes, dts: tag.dts, pts: tag.pts, keyFrame: tag.keyFrame, metaDataTag: tag.metaDataTag }); }; Object.defineProperty(this, 'length', { get: function() { return self.list.length; } }); }; module.exports = TagList; },{}],46:[function(require,module,exports){ 'use strict'; var Stream = require('../utils/stream.js'); var FlvTag = require('./flv-tag.js'); var m2ts = require('../m2ts/m2ts.js'); var AdtsStream = require('../codecs/adts.js'); var H264Stream = require('../codecs/h264').H264Stream; var CoalesceStream = require('./coalesce-stream.js'); var TagList = require('./tag-list.js'); var Transmuxer, VideoSegmentStream, AudioSegmentStream, collectTimelineInfo, metaDataTag, extraDataTag; /** * Store information about the start and end of the tracka and the * duration for each frame/sample we process in order to calculate * the baseMediaDecodeTime */ collectTimelineInfo = function(track, data) { if (typeof data.pts === 'number') { if (track.timelineStartInfo.pts === undefined) { track.timelineStartInfo.pts = data.pts; } else { track.timelineStartInfo.pts = Math.min(track.timelineStartInfo.pts, data.pts); } } if (typeof data.dts === 'number') { if (track.timelineStartInfo.dts === undefined) { track.timelineStartInfo.dts = data.dts; } else { track.timelineStartInfo.dts = Math.min(track.timelineStartInfo.dts, data.dts); } } }; metaDataTag = function(track, pts) { var tag = new FlvTag(FlvTag.METADATA_TAG); // :FlvTag tag.dts = pts; tag.pts = pts; tag.writeMetaDataDouble('videocodecid', 7); tag.writeMetaDataDouble('width', track.width); tag.writeMetaDataDouble('height', track.height); return tag; }; extraDataTag = function(track, pts) { var i, tag = new FlvTag(FlvTag.VIDEO_TAG, true); tag.dts = pts; tag.pts = pts; tag.writeByte(0x01);// version tag.writeByte(track.profileIdc);// profile tag.writeByte(track.profileCompatibility);// compatibility tag.writeByte(track.levelIdc);// level tag.writeByte(0xFC | 0x03); // reserved (6 bits), NULA length size - 1 (2 bits) tag.writeByte(0xE0 | 0x01); // reserved (3 bits), num of SPS (5 bits) tag.writeShort(track.sps[0].length); // data of SPS tag.writeBytes(track.sps[0]); // SPS tag.writeByte(track.pps.length); // num of PPS (will there ever be more that 1 PPS?) for (i = 0; i < track.pps.length; ++i) { tag.writeShort(track.pps[i].length); // 2 bytes for length of PPS tag.writeBytes(track.pps[i]); // data of PPS } return tag; }; /** * Constructs a single-track, media segment from AAC data * events. The output of this stream can be fed to flash. */ AudioSegmentStream = function(track) { var adtsFrames = [], oldExtraData; AudioSegmentStream.prototype.init.call(this); this.push = function(data) { collectTimelineInfo(track, data); if (track && track.channelcount === undefined) { track.audioobjecttype = data.audioobjecttype; track.channelcount = data.channelcount; track.samplerate = data.samplerate; track.samplingfrequencyindex = data.samplingfrequencyindex; track.samplesize = data.samplesize; track.extraData = (track.audioobjecttype << 11) | (track.samplingfrequencyindex << 7) | (track.channelcount << 3); } data.pts = Math.round(data.pts / 90); data.dts = Math.round(data.dts / 90); // buffer audio data until end() is called adtsFrames.push(data); }; this.flush = function() { var currentFrame, adtsFrame, lastMetaPts, tags = new TagList(); // return early if no audio data has been observed if (adtsFrames.length === 0) { this.trigger('done', 'AudioSegmentStream'); return; } lastMetaPts = -Infinity; while (adtsFrames.length) { currentFrame = adtsFrames.shift(); // write out metadata tags every 1 second so that the decoder // is re-initialized quickly after seeking into a different // audio configuration if (track.extraData !== oldExtraData || currentFrame.pts - lastMetaPts >= 1000) { adtsFrame = new FlvTag(FlvTag.METADATA_TAG); adtsFrame.pts = currentFrame.pts; adtsFrame.dts = currentFrame.dts; // AAC is always 10 adtsFrame.writeMetaDataDouble('audiocodecid', 10); adtsFrame.writeMetaDataBoolean('stereo', track.channelcount === 2); adtsFrame.writeMetaDataDouble('audiosamplerate', track.samplerate); // Is AAC always 16 bit? adtsFrame.writeMetaDataDouble('audiosamplesize', 16); tags.push(adtsFrame.finalize()); oldExtraData = track.extraData; adtsFrame = new FlvTag(FlvTag.AUDIO_TAG, true); // For audio, DTS is always the same as PTS. We want to set the DTS // however so we can compare with video DTS to determine approximate // packet order adtsFrame.pts = currentFrame.pts; adtsFrame.dts = currentFrame.dts; adtsFrame.view.setUint16(adtsFrame.position, track.extraData); adtsFrame.position += 2; adtsFrame.length = Math.max(adtsFrame.length, adtsFrame.position); tags.push(adtsFrame.finalize()); lastMetaPts = currentFrame.pts; } adtsFrame = new FlvTag(FlvTag.AUDIO_TAG); adtsFrame.pts = currentFrame.pts; adtsFrame.dts = currentFrame.dts; adtsFrame.writeBytes(currentFrame.data); tags.push(adtsFrame.finalize()); } oldExtraData = null; this.trigger('data', {track: track, tags: tags.list}); this.trigger('done', 'AudioSegmentStream'); }; }; AudioSegmentStream.prototype = new Stream(); /** * Store FlvTags for the h264 stream * @param track {object} track metadata configuration */ VideoSegmentStream = function(track) { var nalUnits = [], config, h264Frame; VideoSegmentStream.prototype.init.call(this); this.finishFrame = function(tags, frame) { if (!frame) { return; } // Check if keyframe and the length of tags. // This makes sure we write metadata on the first frame of a segment. if (config && track && track.newMetadata && (frame.keyFrame || tags.length === 0)) { // Push extra data on every IDR frame in case we did a stream change + seek var metaTag = metaDataTag(config, frame.dts).finalize(); var extraTag = extraDataTag(track, frame.dts).finalize(); metaTag.metaDataTag = extraTag.metaDataTag = true; tags.push(metaTag); tags.push(extraTag); track.newMetadata = false; } frame.endNalUnit(); tags.push(frame.finalize()); h264Frame = null; }; this.push = function(data) { collectTimelineInfo(track, data); data.pts = Math.round(data.pts / 90); data.dts = Math.round(data.dts / 90); // buffer video until flush() is called nalUnits.push(data); }; this.flush = function() { var currentNal, tags = new TagList(); // Throw away nalUnits at the start of the byte stream until we find // the first AUD while (nalUnits.length) { if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') { break; } nalUnits.shift(); } // return early if no video data has been observed if (nalUnits.length === 0) { this.trigger('done', 'VideoSegmentStream'); return; } while (nalUnits.length) { currentNal = nalUnits.shift(); // record the track config if (currentNal.nalUnitType === 'seq_parameter_set_rbsp') { track.newMetadata = true; config = currentNal.config; track.width = config.width; track.height = config.height; track.sps = [currentNal.data]; track.profileIdc = config.profileIdc; track.levelIdc = config.levelIdc; track.profileCompatibility = config.profileCompatibility; h264Frame.endNalUnit(); } else if (currentNal.nalUnitType === 'pic_parameter_set_rbsp') { track.newMetadata = true; track.pps = [currentNal.data]; h264Frame.endNalUnit(); } else if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') { if (h264Frame) { this.finishFrame(tags, h264Frame); } h264Frame = new FlvTag(FlvTag.VIDEO_TAG); h264Frame.pts = currentNal.pts; h264Frame.dts = currentNal.dts; } else { if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') { // the current sample is a key frame h264Frame.keyFrame = true; } h264Frame.endNalUnit(); } h264Frame.startNalUnit(); h264Frame.writeBytes(currentNal.data); } if (h264Frame) { this.finishFrame(tags, h264Frame); } this.trigger('data', {track: track, tags: tags.list}); // Continue with the flush process now this.trigger('done', 'VideoSegmentStream'); }; }; VideoSegmentStream.prototype = new Stream(); /** * An object that incrementally transmuxes MPEG2 Trasport Stream * chunks into an FLV. */ Transmuxer = function(options) { var self = this, packetStream, parseStream, elementaryStream, videoTimestampRolloverStream, audioTimestampRolloverStream, timedMetadataTimestampRolloverStream, adtsStream, h264Stream, videoSegmentStream, audioSegmentStream, captionStream, coalesceStream; Transmuxer.prototype.init.call(this); options = options || {}; // expose the metadata stream this.metadataStream = new m2ts.MetadataStream(); options.metadataStream = this.metadataStream; // set up the parsing pipeline packetStream = new m2ts.TransportPacketStream(); parseStream = new m2ts.TransportParseStream(); elementaryStream = new m2ts.ElementaryStream(); videoTimestampRolloverStream = new m2ts.TimestampRolloverStream('video'); audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio'); timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata'); adtsStream = new AdtsStream(); h264Stream = new H264Stream(); coalesceStream = new CoalesceStream(options); // disassemble MPEG2-TS packets into elementary streams packetStream .pipe(parseStream) .pipe(elementaryStream); // !!THIS ORDER IS IMPORTANT!! // demux the streams elementaryStream .pipe(videoTimestampRolloverStream) .pipe(h264Stream); elementaryStream .pipe(audioTimestampRolloverStream) .pipe(adtsStream); elementaryStream .pipe(timedMetadataTimestampRolloverStream) .pipe(this.metadataStream) .pipe(coalesceStream); // if CEA-708 parsing is available, hook up a caption stream captionStream = new m2ts.CaptionStream(); h264Stream.pipe(captionStream) .pipe(coalesceStream); // hook up the segment streams once track metadata is delivered elementaryStream.on('data', function(data) { var i, videoTrack, audioTrack; if (data.type === 'metadata') { i = data.tracks.length; // scan the tracks listed in the metadata while (i--) { if (data.tracks[i].type === 'video') { videoTrack = data.tracks[i]; } else if (data.tracks[i].type === 'audio') { audioTrack = data.tracks[i]; } } // hook up the video segment stream to the first track with h264 data if (videoTrack && !videoSegmentStream) { coalesceStream.numberOfTracks++; videoSegmentStream = new VideoSegmentStream(videoTrack); // Set up the final part of the video pipeline h264Stream .pipe(videoSegmentStream) .pipe(coalesceStream); } if (audioTrack && !audioSegmentStream) { // hook up the audio segment stream to the first track with aac data coalesceStream.numberOfTracks++; audioSegmentStream = new AudioSegmentStream(audioTrack); // Set up the final part of the audio pipeline adtsStream .pipe(audioSegmentStream) .pipe(coalesceStream); } } }); // feed incoming data to the front of the parsing pipeline this.push = function(data) { packetStream.push(data); }; // flush any buffered data this.flush = function() { // Start at the top of the pipeline and flush all pending work packetStream.flush(); }; // Re-emit any data coming from the coalesce stream to the outside world coalesceStream.on('data', function(event) { self.trigger('data', event); }); // Let the consumer know we have finished flushing the entire pipeline coalesceStream.on('done', function() { self.trigger('done'); }); }; Transmuxer.prototype = new Stream(); // forward compatibility module.exports = Transmuxer; },{"../codecs/adts.js":38,"../codecs/h264":39,"../m2ts/m2ts.js":48,"../utils/stream.js":60,"./coalesce-stream.js":41,"./flv-tag.js":43,"./tag-list.js":45}],47:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2015 Brightcove * All rights reserved. * * Reads in-band caption information from a video elementary * stream. Captions must follow the CEA-708 standard for injection * into an MPEG-2 transport streams. * @see https://en.wikipedia.org/wiki/CEA-708 */ 'use strict'; // ----------------- // Link To Transport // ----------------- // Supplemental enhancement information (SEI) NAL units have a // payload type field to indicate how they are to be // interpreted. CEAS-708 caption content is always transmitted with // payload type 0x04. var USER_DATA_REGISTERED_ITU_T_T35 = 4, RBSP_TRAILING_BITS = 128, Stream = require('../utils/stream'); /** * Parse a supplemental enhancement information (SEI) NAL unit. * Stops parsing once a message of type ITU T T35 has been found. * * @param bytes {Uint8Array} the bytes of a SEI NAL unit * @return {object} the parsed SEI payload * @see Rec. ITU-T H.264, 7.3.2.3.1 */ var parseSei = function(bytes) { var i = 0, result = { payloadType: -1, payloadSize: 0 }, payloadType = 0, payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message while (i < bytes.byteLength) { // stop once we have hit the end of the sei_rbsp if (bytes[i] === RBSP_TRAILING_BITS) { break; } // Parse payload type while (bytes[i] === 0xFF) { payloadType += 255; i++; } payloadType += bytes[i++]; // Parse payload size while (bytes[i] === 0xFF) { payloadSize += 255; i++; } payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break // there can only ever be one caption message in a frame's sei if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) { result.payloadType = payloadType; result.payloadSize = payloadSize; result.payload = bytes.subarray(i, i + payloadSize); break; } // skip the payload and parse the next message i += payloadSize; payloadType = 0; payloadSize = 0; } return result; }; // see ANSI/SCTE 128-1 (2013), section 8.1 var parseUserData = function(sei) { // itu_t_t35_contry_code must be 181 (United States) for // captions if (sei.payload[0] !== 181) { return null; } // itu_t_t35_provider_code should be 49 (ATSC) for captions if (((sei.payload[1] << 8) | sei.payload[2]) !== 49) { return null; } // the user_identifier should be "GA94" to indicate ATSC1 data if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') { return null; } // finally, user_data_type_code should be 0x03 for caption data if (sei.payload[7] !== 0x03) { return null; } // return the user_data_type_structure and strip the trailing // marker bits return sei.payload.subarray(8, sei.payload.length - 1); }; // see CEA-708-D, section 4.4 var parseCaptionPackets = function(pts, userData) { var results = [], i, count, offset, data; // if this is just filler, return immediately if (!(userData[0] & 0x40)) { return results; } // parse out the cc_data_1 and cc_data_2 fields count = userData[0] & 0x1f; for (i = 0; i < count; i++) { offset = i * 3; data = { type: userData[offset + 2] & 0x03, pts: pts }; // capture cc data when cc_valid is 1 if (userData[offset + 2] & 0x04) { data.ccData = (userData[offset + 3] << 8) | userData[offset + 4]; results.push(data); } } return results; }; var CaptionStream = function() { CaptionStream.prototype.init.call(this); this.captionPackets_ = []; this.field1_ = new Cea608Stream(); // eslint-disable-line no-use-before-define // forward data and done events from field1_ to this CaptionStream this.field1_.on('data', this.trigger.bind(this, 'data')); this.field1_.on('done', this.trigger.bind(this, 'done')); }; CaptionStream.prototype = new Stream(); CaptionStream.prototype.push = function(event) { var sei, userData; // only examine SEI NALs if (event.nalUnitType !== 'sei_rbsp') { return; } // parse the sei sei = parseSei(event.escapedRBSP); // ignore everything but user_data_registered_itu_t_t35 if (sei.payloadType !== USER_DATA_REGISTERED_ITU_T_T35) { return; } // parse out the user data payload userData = parseUserData(sei); // ignore unrecognized userData if (!userData) { return; } // parse out CC data packets and save them for later this.captionPackets_ = this.captionPackets_.concat(parseCaptionPackets(event.pts, userData)); }; CaptionStream.prototype.flush = function() { // make sure we actually parsed captions before proceeding if (!this.captionPackets_.length) { this.field1_.flush(); return; } // In Chrome, the Array#sort function is not stable so add a // presortIndex that we can use to ensure we get a stable-sort this.captionPackets_.forEach(function(elem, idx) { elem.presortIndex = idx; }); // sort caption byte-pairs based on their PTS values this.captionPackets_.sort(function(a, b) { if (a.pts === b.pts) { return a.presortIndex - b.presortIndex; } return a.pts - b.pts; }); // Push each caption into Cea608Stream this.captionPackets_.forEach(this.field1_.push, this.field1_); this.captionPackets_.length = 0; this.field1_.flush(); return; }; // ---------------------- // Session to Application // ---------------------- var BASIC_CHARACTER_TRANSLATION = { 0x2a: 0xe1, 0x5c: 0xe9, 0x5e: 0xed, 0x5f: 0xf3, 0x60: 0xfa, 0x7b: 0xe7, 0x7c: 0xf7, 0x7d: 0xd1, 0x7e: 0xf1, 0x7f: 0x2588 }; var getCharFromCode = function(code) { if (code === null) { return ''; } code = BASIC_CHARACTER_TRANSLATION[code] || code; return String.fromCharCode(code); }; // Constants for the byte codes recognized by Cea608Stream. This // list is not exhaustive. For a more comprehensive listing and // semantics see // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf var PADDING = 0x0000, // Pop-on Mode RESUME_CAPTION_LOADING = 0x1420, END_OF_CAPTION = 0x142f, // Roll-up Mode ROLL_UP_2_ROWS = 0x1425, ROLL_UP_3_ROWS = 0x1426, ROLL_UP_4_ROWS = 0x1427, CARRIAGE_RETURN = 0x142d, // Erasure BACKSPACE = 0x1421, ERASE_DISPLAYED_MEMORY = 0x142c, ERASE_NON_DISPLAYED_MEMORY = 0x142e; // the index of the last row in a CEA-608 display buffer var BOTTOM_ROW = 14; // CEA-608 captions are rendered onto a 34x15 matrix of character // cells. The "bottom" row is the last element in the outer array. var createDisplayBuffer = function() { var result = [], i = BOTTOM_ROW + 1; while (i--) { result.push(''); } return result; }; var Cea608Stream = function() { Cea608Stream.prototype.init.call(this); this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will // actually display captions. If a caption is shifted to a row // with a lower index than this, it is cleared from the display // buffer this.topRow_ = 0; this.startPts_ = 0; this.displayed_ = createDisplayBuffer(); this.nonDisplayed_ = createDisplayBuffer(); this.lastControlCode_ = null; this.push = function(packet) { // Ignore other channels if (packet.type !== 0) { return; } var data, swap, char0, char1; // remove the parity bits data = packet.ccData & 0x7f7f; // ignore duplicate control codes if (data === this.lastControlCode_) { this.lastControlCode_ = null; return; } // Store control codes if ((data & 0xf000) === 0x1000) { this.lastControlCode_ = data; } else { this.lastControlCode_ = null; } switch (data) { case PADDING: break; case RESUME_CAPTION_LOADING: this.mode_ = 'popOn'; break; case END_OF_CAPTION: // if a caption was being displayed, it's gone now this.flushDisplayed(packet.pts); // flip memory swap = this.displayed_; this.displayed_ = this.nonDisplayed_; this.nonDisplayed_ = swap; // start measuring the time to display the caption this.startPts_ = packet.pts; break; case ROLL_UP_2_ROWS: this.topRow_ = BOTTOM_ROW - 1; this.mode_ = 'rollUp'; break; case ROLL_UP_3_ROWS: this.topRow_ = BOTTOM_ROW - 2; this.mode_ = 'rollUp'; break; case ROLL_UP_4_ROWS: this.topRow_ = BOTTOM_ROW - 3; this.mode_ = 'rollUp'; break; case CARRIAGE_RETURN: this.flushDisplayed(packet.pts); this.shiftRowsUp_(); this.startPts_ = packet.pts; break; case BACKSPACE: if (this.mode_ === 'popOn') { this.nonDisplayed_[BOTTOM_ROW] = this.nonDisplayed_[BOTTOM_ROW].slice(0, -1); } else { this.displayed_[BOTTOM_ROW] = this.displayed_[BOTTOM_ROW].slice(0, -1); } break; case ERASE_DISPLAYED_MEMORY: this.flushDisplayed(packet.pts); this.displayed_ = createDisplayBuffer(); break; case ERASE_NON_DISPLAYED_MEMORY: this.nonDisplayed_ = createDisplayBuffer(); break; default: char0 = data >>> 8; char1 = data & 0xff; // Look for a Channel 1 Preamble Address Code if (char0 >= 0x10 && char0 <= 0x17 && char1 >= 0x40 && char1 <= 0x7F && (char0 !== 0x10 || char1 < 0x60)) { // Follow Safari's lead and replace the PAC with a space char0 = 0x20; // we only want one space so make the second character null // which will get become '' in getCharFromCode char1 = null; } // Look for special character sets if ((char0 === 0x11 || char0 === 0x19) && (char1 >= 0x30 && char1 <= 0x3F)) { // Put in eigth note and space char0 = 0x266A; char1 = ''; } // ignore unsupported control codes if ((char0 & 0xf0) === 0x10) { return; } // remove null chars if (char0 === 0x00) { char0 = null; } if (char1 === 0x00) { char1 = null; } // character handling is dependent on the current mode this[this.mode_](packet.pts, char0, char1); break; } }; }; Cea608Stream.prototype = new Stream(); // Trigger a cue point that captures the current state of the // display buffer Cea608Stream.prototype.flushDisplayed = function(pts) { var content = this.displayed_ // remove spaces from the start and end of the string .map(function(row) { return row.trim(); }) // remove empty rows .filter(function(row) { return row.length; }) // combine all text rows to display in one cue .join('\n'); if (content.length) { this.trigger('data', { startPts: this.startPts_, endPts: pts, text: content }); } }; // Mode Implementations Cea608Stream.prototype.popOn = function(pts, char0, char1) { var baseRow = this.nonDisplayed_[BOTTOM_ROW]; // buffer characters baseRow += getCharFromCode(char0); baseRow += getCharFromCode(char1); this.nonDisplayed_[BOTTOM_ROW] = baseRow; }; Cea608Stream.prototype.rollUp = function(pts, char0, char1) { var baseRow = this.displayed_[BOTTOM_ROW]; if (baseRow === '') { // we're starting to buffer new display input, so flush out the // current display this.flushDisplayed(pts); this.startPts_ = pts; } baseRow += getCharFromCode(char0); baseRow += getCharFromCode(char1); this.displayed_[BOTTOM_ROW] = baseRow; }; Cea608Stream.prototype.shiftRowsUp_ = function() { var i; // clear out inactive rows for (i = 0; i < this.topRow_; i++) { this.displayed_[i] = ''; } // shift displayed rows up for (i = this.topRow_; i < BOTTOM_ROW; i++) { this.displayed_[i] = this.displayed_[i + 1]; } // clear out the bottom row this.displayed_[BOTTOM_ROW] = ''; }; // exports module.exports = { CaptionStream: CaptionStream, Cea608Stream: Cea608Stream }; },{"../utils/stream":60}],48:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2015 Brightcove * All rights reserved. * * A stream-based mp2t to mp4 converter. This utility can be used to * deliver mp4s to a SourceBuffer on platforms that support native * Media Source Extensions. */ 'use strict'; var Stream = require('../utils/stream.js'), CaptionStream = require('./caption-stream'), StreamTypes = require('./stream-types'), TimestampRolloverStream = require('./timestamp-rollover-stream').TimestampRolloverStream; var m2tsStreamTypes = require('./stream-types.js'); // object types var TransportPacketStream, TransportParseStream, ElementaryStream; // constants var MP2T_PACKET_LENGTH = 188, // bytes SYNC_BYTE = 0x47; /** * Splits an incoming stream of binary data into MPEG-2 Transport * Stream packets. */ TransportPacketStream = function() { var buffer = new Uint8Array(MP2T_PACKET_LENGTH), bytesInBuffer = 0; TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream. this.push = function(bytes) { var startIndex = 0, endIndex = MP2T_PACKET_LENGTH, everything; // If there are bytes remaining from the last segment, prepend them to the // bytes that were pushed in if (bytesInBuffer) { everything = new Uint8Array(bytes.byteLength + bytesInBuffer); everything.set(buffer.subarray(0, bytesInBuffer)); everything.set(bytes, bytesInBuffer); bytesInBuffer = 0; } else { everything = bytes; } // While we have enough data for a packet while (endIndex < everything.byteLength) { // Look for a pair of start and end sync bytes in the data.. if (everything[startIndex] === SYNC_BYTE && everything[endIndex] === SYNC_BYTE) { // We found a packet so emit it and jump one whole packet forward in // the stream this.trigger('data', everything.subarray(startIndex, endIndex)); startIndex += MP2T_PACKET_LENGTH; endIndex += MP2T_PACKET_LENGTH; continue; } // If we get here, we have somehow become de-synchronized and we need to step // forward one byte at a time until we find a pair of sync bytes that denote // a packet startIndex++; endIndex++; } // If there was some data left over at the end of the segment that couldn't // possibly be a whole packet, keep it because it might be the start of a packet // that continues in the next segment if (startIndex < everything.byteLength) { buffer.set(everything.subarray(startIndex), 0); bytesInBuffer = everything.byteLength - startIndex; } }; this.flush = function() { // If the buffer contains a whole packet when we are being flushed, emit it // and empty the buffer. Otherwise hold onto the data because it may be // important for decoding the next segment if (bytesInBuffer === MP2T_PACKET_LENGTH && buffer[0] === SYNC_BYTE) { this.trigger('data', buffer); bytesInBuffer = 0; } this.trigger('done'); }; }; TransportPacketStream.prototype = new Stream(); /** * Accepts an MP2T TransportPacketStream and emits data events with parsed * forms of the individual transport stream packets. */ TransportParseStream = function() { var parsePsi, parsePat, parsePmt, self; TransportParseStream.prototype.init.call(this); self = this; this.packetsWaitingForPmt = []; this.programMapTable = undefined; parsePsi = function(payload, psi) { var offset = 0; // PSI packets may be split into multiple sections and those // sections may be split into multiple packets. If a PSI // section starts in this packet, the payload_unit_start_indicator // will be true and the first byte of the payload will indicate // the offset from the current position to the start of the // section. if (psi.payloadUnitStartIndicator) { offset += payload[offset] + 1; } if (psi.type === 'pat') { parsePat(payload.subarray(offset), psi); } else { parsePmt(payload.subarray(offset), psi); } }; parsePat = function(payload, pat) { pat.section_number = payload[7]; // eslint-disable-line camelcase pat.last_section_number = payload[8]; // eslint-disable-line camelcase // skip the PSI header and parse the first PMT entry self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11]; pat.pmtPid = self.pmtPid; }; /** * Parse out the relevant fields of a Program Map Table (PMT). * @param payload {Uint8Array} the PMT-specific portion of an MP2T * packet. The first byte in this array should be the table_id * field. * @param pmt {object} the object that should be decorated with * fields parsed from the PMT. */ parsePmt = function(payload, pmt) { var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually // take effect. We don't believe this should ever be the case // for HLS but we'll ignore "forward" PMT declarations if we see // them. Future PMT declarations have the current_next_indicator // set to zero. if (!(payload[5] & 0x01)) { return; } // overwrite any existing program map table self.programMapTable = {}; // the mapping table ends at the end of the current section sectionLength = (payload[1] & 0x0f) << 8 | payload[2]; tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how // long the program info descriptors are programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table offset = 12 + programInfoLength; while (offset < tableEnd) { // add an entry that maps the elementary_pid to the stream_type self.programMapTable[(payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]] = payload[offset]; // move to the next table entry // skip past the elementary stream descriptors, if present offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5; } // record the map on the packet as well pmt.programMapTable = self.programMapTable; // if there are any packets waiting for a PMT to be found, process them now while (self.packetsWaitingForPmt.length) { self.processPes_.apply(self, self.packetsWaitingForPmt.shift()); } }; /** * Deliver a new MP2T packet to the stream. */ this.push = function(packet) { var result = {}, offset = 4; result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1] result.pid = packet[1] & 0x1f; result.pid <<= 8; result.pid |= packet[2]; // if an adaption field is present, its length is specified by the // fifth byte of the TS packet header. The adaptation field is // used to add stuffing to PES packets that don't fill a complete // TS packet, and to specify some forms of timing and control data // that we do not currently use. if (((packet[3] & 0x30) >>> 4) > 0x01) { offset += packet[offset] + 1; } // parse the rest of the packet based on the type if (result.pid === 0) { result.type = 'pat'; parsePsi(packet.subarray(offset), result); this.trigger('data', result); } else if (result.pid === this.pmtPid) { result.type = 'pmt'; parsePsi(packet.subarray(offset), result); this.trigger('data', result); } else if (this.programMapTable === undefined) { // When we have not seen a PMT yet, defer further processing of // PES packets until one has been parsed this.packetsWaitingForPmt.push([packet, offset, result]); } else { this.processPes_(packet, offset, result); } }; this.processPes_ = function(packet, offset, result) { result.streamType = this.programMapTable[result.pid]; result.type = 'pes'; result.data = packet.subarray(offset); this.trigger('data', result); }; }; TransportParseStream.prototype = new Stream(); TransportParseStream.STREAM_TYPES = { h264: 0x1b, adts: 0x0f }; /** * Reconsistutes program elementary stream (PES) packets from parsed * transport stream packets. That is, if you pipe an * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output * events will be events which capture the bytes for individual PES * packets plus relevant metadata that has been extracted from the * container. */ ElementaryStream = function() { var self = this, // PES packet fragments video = { data: [], size: 0 }, audio = { data: [], size: 0 }, timedMetadata = { data: [], size: 0 }, parsePes = function(payload, pes) { var ptsDtsFlags; // find out if this packets starts a new keyframe pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value // and a DTS value. Determine what combination of values is // available to work with. ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number. Javascript // performs all bitwise operations on 32-bit integers but javascript // supports a much greater range (52-bits) of integer using standard // mathematical operations. // We construct a 31-bit value using bitwise operators over the 31 // most significant bits and then multiply by 4 (equal to a left-shift // of 2) before we add the final 2 least significant bits of the // timestamp (equal to an OR.) if (ptsDtsFlags & 0xC0) { // the PTS and DTS are not written out directly. For information // on how they are encoded, see // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3; pes.pts *= 4; // Left shift by 2 pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs pes.dts = pes.pts; if (ptsDtsFlags & 0x40) { pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3; pes.dts *= 4; // Left shift by 2 pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs } } // the data section starts immediately after the PES header. // pes_header_data_length specifies the number of header bytes // that follow the last byte of the field. pes.data = payload.subarray(9 + payload[8]); }, flushStream = function(stream, type) { var packetData = new Uint8Array(stream.size), event = { type: type }, i = 0, fragment; // do nothing if there is no buffered data if (!stream.data.length) { return; } event.trackId = stream.data[0].pid; // reassemble the packet while (stream.data.length) { fragment = stream.data.shift(); packetData.set(fragment.data, i); i += fragment.data.byteLength; } // parse assembled packet's PES header parsePes(packetData, event); stream.size = 0; self.trigger('data', event); }; ElementaryStream.prototype.init.call(this); this.push = function(data) { ({ pat: function() { // we have to wait for the PMT to arrive as well before we // have any meaningful metadata }, pes: function() { var stream, streamType; switch (data.streamType) { case StreamTypes.H264_STREAM_TYPE: case m2tsStreamTypes.H264_STREAM_TYPE: stream = video; streamType = 'video'; break; case StreamTypes.ADTS_STREAM_TYPE: stream = audio; streamType = 'audio'; break; case StreamTypes.METADATA_STREAM_TYPE: stream = timedMetadata; streamType = 'timed-metadata'; break; default: // ignore unknown stream types return; } // if a new packet is starting, we can flush the completed // packet if (data.payloadUnitStartIndicator) { flushStream(stream, streamType); } // buffer this fragment until we are sure we've received the // complete payload stream.data.push(data); stream.size += data.data.byteLength; }, pmt: function() { var event = { type: 'metadata', tracks: [] }, programMapTable = data.programMapTable, k, track; // translate streams to tracks for (k in programMapTable) { if (programMapTable.hasOwnProperty(k)) { track = { timelineStartInfo: { baseMediaDecodeTime: 0 } }; track.id = +k; if (programMapTable[k] === m2tsStreamTypes.H264_STREAM_TYPE) { track.codec = 'avc'; track.type = 'video'; } else if (programMapTable[k] === m2tsStreamTypes.ADTS_STREAM_TYPE) { track.codec = 'adts'; track.type = 'audio'; } event.tracks.push(track); } } self.trigger('data', event); } })[data.type](); }; /** * Flush any remaining input. Video PES packets may be of variable * length. Normally, the start of a new video packet can trigger the * finalization of the previous packet. That is not possible if no * more video is forthcoming, however. In that case, some other * mechanism (like the end of the file) has to be employed. When it is * clear that no additional data is forthcoming, calling this method * will flush the buffered packets. */ this.flush = function() { // !!THIS ORDER IS IMPORTANT!! // video first then audio flushStream(video, 'video'); flushStream(audio, 'audio'); flushStream(timedMetadata, 'timed-metadata'); this.trigger('done'); }; }; ElementaryStream.prototype = new Stream(); var m2ts = { PAT_PID: 0x0000, MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH, TransportPacketStream: TransportPacketStream, TransportParseStream: TransportParseStream, ElementaryStream: ElementaryStream, TimestampRolloverStream: TimestampRolloverStream, CaptionStream: CaptionStream.CaptionStream, Cea608Stream: CaptionStream.Cea608Stream, MetadataStream: require('./metadata-stream') }; for (var type in StreamTypes) { if (StreamTypes.hasOwnProperty(type)) { m2ts[type] = StreamTypes[type]; } } module.exports = m2ts; },{"../utils/stream.js":60,"./caption-stream":47,"./metadata-stream":49,"./stream-types":51,"./stream-types.js":51,"./timestamp-rollover-stream":52}],49:[function(require,module,exports){ /** * Accepts program elementary stream (PES) data events and parses out * ID3 metadata from them, if present. * @see http://id3.org/id3v2.3.0 */ 'use strict'; var Stream = require('../utils/stream'), StreamTypes = require('./stream-types'), // return a percent-encoded representation of the specified byte range // @see http://en.wikipedia.org/wiki/Percent-encoding percentEncode = function(bytes, start, end) { var i, result = ''; for (i = start; i < end; i++) { result += '%' + ('00' + bytes[i].toString(16)).slice(-2); } return result; }, // return the string representation of the specified byte range, // interpreted as UTf-8. parseUtf8 = function(bytes, start, end) { return decodeURIComponent(percentEncode(bytes, start, end)); }, // return the string representation of the specified byte range, // interpreted as ISO-8859-1. parseIso88591 = function(bytes, start, end) { return unescape(percentEncode(bytes, start, end)); // jshint ignore:line }, parseSyncSafeInteger = function(data) { return (data[0] << 21) | (data[1] << 14) | (data[2] << 7) | (data[3]); }, tagParsers = { TXXX: function(tag) { var i; if (tag.data[0] !== 3) { // ignore frames with unrecognized character encodings return; } for (i = 1; i < tag.data.length; i++) { if (tag.data[i] === 0) { // parse the text fields tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\0*$/, ''); break; } } tag.data = tag.value; }, WXXX: function(tag) { var i; if (tag.data[0] !== 3) { // ignore frames with unrecognized character encodings return; } for (i = 1; i < tag.data.length; i++) { if (tag.data[i] === 0) { // parse the description and URL fields tag.description = parseUtf8(tag.data, 1, i); tag.url = parseUtf8(tag.data, i + 1, tag.data.length); break; } } }, PRIV: function(tag) { var i; for (i = 0; i < tag.data.length; i++) { if (tag.data[i] === 0) { // parse the description and URL fields tag.owner = parseIso88591(tag.data, 0, i); break; } } tag.privateData = tag.data.subarray(i + 1); tag.data = tag.privateData; } }, MetadataStream; MetadataStream = function(options) { var settings = { debug: !!(options && options.debug), // the bytes of the program-level descriptor field in MP2T // see ISO/IEC 13818-1:2013 (E), section 2.6 "Program and // program element descriptors" descriptor: options && options.descriptor }, // the total size in bytes of the ID3 tag being parsed tagSize = 0, // tag data that is not complete enough to be parsed buffer = [], // the total number of bytes currently in the buffer bufferSize = 0, i; MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track this.dispatchType = StreamTypes.METADATA_STREAM_TYPE.toString(16); if (settings.descriptor) { for (i = 0; i < settings.descriptor.length; i++) { this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2); } } this.push = function(chunk) { var tag, frameStart, frameSize, frame, i, frameHeader; if (chunk.type !== 'timed-metadata') { return; } // if data_alignment_indicator is set in the PES header, // we must have the start of a new ID3 tag. Assume anything // remaining in the buffer was malformed and throw it out if (chunk.dataAlignmentIndicator) { bufferSize = 0; buffer.length = 0; } // ignore events that don't look like ID3 data 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))) { if (settings.debug) { // eslint-disable-next-line no-console console.log('Skipping unrecognized metadata packet'); } return; } // add this chunk to the data we've collected so far buffer.push(chunk); bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header if (buffer.length === 1) { // the frame size is transmitted as a 28-bit integer in the // last four bytes of the ID3 header. // The most significant bit of each byte is dropped and the // results concatenated to recover the actual value. tagSize = parseSyncSafeInteger(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more // convenient for our comparisons to include it tagSize += 10; } // if the entire frame has not arrived, wait for more data if (bufferSize < tagSize) { return; } // collect the entire frame so it can be parsed tag = { data: new Uint8Array(tagSize), frames: [], pts: buffer[0].pts, dts: buffer[0].dts }; for (i = 0; i < tagSize;) { tag.data.set(buffer[0].data.subarray(0, tagSize - i), i); i += buffer[0].data.byteLength; bufferSize -= buffer[0].data.byteLength; buffer.shift(); } // find the start of the first frame and the end of the tag frameStart = 10; if (tag.data[5] & 0x40) { // advance the frame start past the extended header frameStart += 4; // header size field frameStart += parseSyncSafeInteger(tag.data.subarray(10, 14)); // clip any padding off the end tagSize -= parseSyncSafeInteger(tag.data.subarray(16, 20)); } // parse one or more ID3 frames // http://id3.org/id3v2.3.0#ID3v2_frame_overview do { // determine the number of bytes in this frame frameSize = parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8)); if (frameSize < 1) { // eslint-disable-next-line no-console return console.log('Malformed ID3 frame encountered. Skipping metadata parsing.'); } frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]); frame = { id: frameHeader, data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10) }; frame.key = frame.id; if (tagParsers[frame.id]) { tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start // time for raw AAC data if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') { var d = frame.data, size = ((d[3] & 0x01) << 30) | (d[4] << 22) | (d[5] << 14) | (d[6] << 6) | (d[7] >>> 2); size *= 4; size += d[7] & 0x03; frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based // on the value of this frame // we couldn't have known the appropriate pts and dts before // parsing this ID3 tag so set those values now if (tag.pts === undefined && tag.dts === undefined) { tag.pts = frame.timeStamp; tag.dts = frame.timeStamp; } this.trigger('timestamp', frame); } } tag.frames.push(frame); frameStart += 10; // advance past the frame header frameStart += frameSize; // advance past the frame body } while (frameStart < tagSize); this.trigger('data', tag); }; }; MetadataStream.prototype = new Stream(); module.exports = MetadataStream; },{"../utils/stream":60,"./stream-types":51}],50:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2016 Brightcove * All rights reserved. * * Utilities to detect basic properties and metadata about TS Segments. */ 'use strict'; var StreamTypes = require('./stream-types.js'); var parsePid = function(packet) { var pid = packet[1] & 0x1f; pid <<= 8; pid |= packet[2]; return pid; }; var parsePayloadUnitStartIndicator = function(packet) { return !!(packet[1] & 0x40); }; var parseAdaptionField = function(packet) { var offset = 0; // if an adaption field is present, its length is specified by the // fifth byte of the TS packet header. The adaptation field is // used to add stuffing to PES packets that don't fill a complete // TS packet, and to specify some forms of timing and control data // that we do not currently use. if (((packet[3] & 0x30) >>> 4) > 0x01) { offset += packet[4] + 1; } return offset; }; var parseType = function(packet, pmtPid) { var pid = parsePid(packet); if (pid === 0) { return 'pat'; } else if (pid === pmtPid) { return 'pmt'; } else if (pmtPid) { return 'pes'; } return null; }; var parsePat = function(packet) { var pusi = parsePayloadUnitStartIndicator(packet); var offset = 4 + parseAdaptionField(packet); if (pusi) { offset += packet[offset] + 1; } return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11]; }; var parsePmt = function(packet) { var programMapTable = {}; var pusi = parsePayloadUnitStartIndicator(packet); var payloadOffset = 4 + parseAdaptionField(packet); if (pusi) { payloadOffset += packet[payloadOffset] + 1; } // PMTs can be sent ahead of the time when they should actually // take effect. We don't believe this should ever be the case // for HLS but we'll ignore "forward" PMT declarations if we see // them. Future PMT declarations have the current_next_indicator // set to zero. if (!(packet[payloadOffset + 5] & 0x01)) { return; } var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2]; tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how // long the program info descriptors are programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table var offset = 12 + programInfoLength; while (offset < tableEnd) { var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry // skip past the elementary stream descriptors, if present offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5; } return programMapTable; }; var parsePesType = function(packet, programMapTable) { var pid = parsePid(packet); var type = programMapTable[pid]; switch (type) { case StreamTypes.H264_STREAM_TYPE: return 'video'; case StreamTypes.ADTS_STREAM_TYPE: return 'audio'; case StreamTypes.METADATA_STREAM_TYPE: return 'timed-metadata'; default: return null; } }; var parsePesTime = function(packet) { var pusi = parsePayloadUnitStartIndicator(packet); if (!pusi) { return null; } var offset = 4 + parseAdaptionField(packet); var pes = {}; var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value // and a DTS value. Determine what combination of values is // available to work with. ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number. Javascript // performs all bitwise operations on 32-bit integers but javascript // supports a much greater range (52-bits) of integer using standard // mathematical operations. // We construct a 31-bit value using bitwise operators over the 31 // most significant bits and then multiply by 4 (equal to a left-shift // of 2) before we add the final 2 least significant bits of the // timestamp (equal to an OR.) if (ptsDtsFlags & 0xC0) { // the PTS and DTS are not written out directly. For information // on how they are encoded, see // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html 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; pes.pts *= 4; // Left shift by 2 pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs pes.dts = pes.pts; if (ptsDtsFlags & 0x40) { 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; pes.dts *= 4; // Left shift by 2 pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs } } return pes; }; var parseNalUnitType = function(type) { switch (type) { case 0x05: return 'slice_layer_without_partitioning_rbsp_idr'; case 0x06: return 'sei_rbsp'; case 0x07: return 'seq_parameter_set_rbsp'; case 0x08: return 'pic_parameter_set_rbsp'; case 0x09: return 'access_unit_delimiter_rbsp'; default: return null; } }; var videoPacketContainsKeyFrame = function(packet) { var offset = 4 + parseAdaptionField(packet); var frameBuffer = packet.subarray(offset); var frameI = 0; var frameSyncPoint = 0; var foundKeyFrame = false; var nalType; // advance the sync point to a NAL start, if necessary for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) { if (frameBuffer[frameSyncPoint + 2] === 1) { // the sync point is properly aligned frameI = frameSyncPoint + 5; break; } } while (frameI < frameBuffer.byteLength) { // look at the current byte to determine if we've hit the end of // a NAL unit boundary switch (frameBuffer[frameI]) { case 0: // skip past non-sync sequences if (frameBuffer[frameI - 1] !== 0) { frameI += 2; break; } else if (frameBuffer[frameI - 2] !== 0) { frameI++; break; } if (frameSyncPoint + 3 !== frameI - 2) { nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f); if (nalType === 'slice_layer_without_partitioning_rbsp_idr') { foundKeyFrame = true; } } // drop trailing zeroes do { frameI++; } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length); frameSyncPoint = frameI - 2; frameI += 3; break; case 1: // skip past non-sync sequences if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) { frameI += 3; break; } nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f); if (nalType === 'slice_layer_without_partitioning_rbsp_idr') { foundKeyFrame = true; } frameSyncPoint = frameI - 2; frameI += 3; break; default: // the current byte isn't a one or zero, so it cannot be part // of a sync sequence frameI += 3; break; } } frameBuffer = frameBuffer.subarray(frameSyncPoint); frameI -= frameSyncPoint; frameSyncPoint = 0; // parse the final nal if (frameBuffer && frameBuffer.byteLength > 3) { nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f); if (nalType === 'slice_layer_without_partitioning_rbsp_idr') { foundKeyFrame = true; } } return foundKeyFrame; }; module.exports = { parseType: parseType, parsePat: parsePat, parsePmt: parsePmt, parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator, parsePesType: parsePesType, parsePesTime: parsePesTime, videoPacketContainsKeyFrame: videoPacketContainsKeyFrame }; },{"./stream-types.js":51}],51:[function(require,module,exports){ 'use strict'; module.exports = { H264_STREAM_TYPE: 0x1B, ADTS_STREAM_TYPE: 0x0F, METADATA_STREAM_TYPE: 0x15 }; },{}],52:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2016 Brightcove * All rights reserved. * * Accepts program elementary stream (PES) data events and corrects * decode and presentation time stamps to account for a rollover * of the 33 bit value. */ 'use strict'; var Stream = require('../utils/stream'); var MAX_TS = 8589934592; var RO_THRESH = 4294967296; var handleRollover = function(value, reference) { var direction = 1; if (value > reference) { // If the current timestamp value is greater than our reference timestamp and we detect a // timestamp rollover, this means the roll over is happening in the opposite direction. // Example scenario: Enter a long stream/video just after a rollover occurred. The reference // point will be set to a small number, e.g. 1. The user then seeks backwards over the // rollover point. In loading this segment, the timestamp values will be very large, // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust // the time stamp to be `value - 2^33`. direction = -1; } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will // cause an incorrect adjustment. while (Math.abs(reference - value) > RO_THRESH) { value += (direction * MAX_TS); } return value; }; var TimestampRolloverStream = function(type) { var lastDTS, referenceDTS; TimestampRolloverStream.prototype.init.call(this); this.type_ = type; this.push = function(data) { if (data.type !== this.type_) { return; } if (referenceDTS === undefined) { referenceDTS = data.dts; } data.dts = handleRollover(data.dts, referenceDTS); data.pts = handleRollover(data.pts, referenceDTS); lastDTS = data.dts; this.trigger('data', data); }; this.flush = function() { referenceDTS = lastDTS; this.trigger('done'); }; this.discontinuity = function() { referenceDTS = void 0; lastDTS = void 0; }; }; TimestampRolloverStream.prototype = new Stream(); module.exports = { TimestampRolloverStream: TimestampRolloverStream, handleRollover: handleRollover }; },{"../utils/stream":60}],53:[function(require,module,exports){ module.exports = { generator: require('./mp4-generator'), Transmuxer: require('./transmuxer').Transmuxer, AudioSegmentStream: require('./transmuxer').AudioSegmentStream, VideoSegmentStream: require('./transmuxer').VideoSegmentStream }; },{"./mp4-generator":54,"./transmuxer":56}],54:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2015 Brightcove * All rights reserved. * * Functions that generate fragmented MP4s suitable for use with Media * Source Extensions. */ 'use strict'; var UINT32_MAX = Math.pow(2, 32) - 1; var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants (function() { var i; types = { avc1: [], // codingname avcC: [], btrt: [], dinf: [], dref: [], esds: [], ftyp: [], hdlr: [], mdat: [], mdhd: [], mdia: [], mfhd: [], minf: [], moof: [], moov: [], mp4a: [], // codingname mvex: [], mvhd: [], sdtp: [], smhd: [], stbl: [], stco: [], stsc: [], stsd: [], stsz: [], stts: [], styp: [], tfdt: [], tfhd: [], traf: [], trak: [], trun: [], trex: [], tkhd: [], vmhd: [] }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we // don't throw an error if (typeof Uint8Array === 'undefined') { return; } for (i in types) { if (types.hasOwnProperty(i)) { types[i] = [ i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3) ]; } } MAJOR_BRAND = new Uint8Array([ 'i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0) ]); AVC1_BRAND = new Uint8Array([ 'a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0) ]); MINOR_VERSION = new Uint8Array([0, 0, 0, 1]); VIDEO_HDLR = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x00, // pre_defined 0x76, 0x69, 0x64, 0x65, // handler_type: 'vide' 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved 0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler' ]); AUDIO_HDLR = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x00, // pre_defined 0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun' 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved 0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler' ]); HDLR_TYPES = { video: VIDEO_HDLR, audio: AUDIO_HDLR }; DREF = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x01, // entry_count 0x00, 0x00, 0x00, 0x0c, // entry_size 0x75, 0x72, 0x6c, 0x20, // 'url' type 0x00, // version 0 0x00, 0x00, 0x01 // entry_flags ]); SMHD = new Uint8Array([ 0x00, // version 0x00, 0x00, 0x00, // flags 0x00, 0x00, // balance, 0 means centered 0x00, 0x00 // reserved ]); STCO = new Uint8Array([ 0x00, // version 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x00 // entry_count ]); STSC = STCO; STSZ = new Uint8Array([ 0x00, // version 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x00, // sample_size 0x00, 0x00, 0x00, 0x00 // sample_count ]); STTS = STCO; VMHD = new Uint8Array([ 0x00, // version 0x00, 0x00, 0x01, // flags 0x00, 0x00, // graphicsmode 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor ]); }()); box = function(type) { var payload = [], size = 0, i, result, view; for (i = 1; i < arguments.length; i++) { payload.push(arguments[i]); } i = payload.length; // calculate the total size we need to allocate while (i--) { size += payload[i].byteLength; } result = new Uint8Array(size + 8); view = new DataView(result.buffer, result.byteOffset, result.byteLength); view.setUint32(0, result.byteLength); result.set(type, 4); // copy the payload into the result for (i = 0, size = 8; i < payload.length; i++) { result.set(payload[i], size); size += payload[i].byteLength; } return result; }; dinf = function() { return box(types.dinf, box(types.dref, DREF)); }; esds = function(track) { return box(types.esds, new Uint8Array([ 0x00, // version 0x00, 0x00, 0x00, // flags // ES_Descriptor 0x03, // tag, ES_DescrTag 0x19, // length 0x00, 0x00, // ES_ID 0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority // DecoderConfigDescriptor 0x04, // tag, DecoderConfigDescrTag 0x11, // length 0x40, // object type 0x15, // streamType 0x00, 0x06, 0x00, // bufferSizeDB 0x00, 0x00, 0xda, 0xc0, // maxBitrate 0x00, 0x00, 0xda, 0xc0, // avgBitrate // DecoderSpecificInfo 0x05, // tag, DecoderSpecificInfoTag 0x02, // length // ISO/IEC 14496-3, AudioSpecificConfig // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35 (track.audioobjecttype << 3) | (track.samplingfrequencyindex >>> 1), (track.samplingfrequencyindex << 7) | (track.channelcount << 3), 0x06, 0x01, 0x02 // GASpecificConfig ])); }; ftyp = function() { return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND); }; hdlr = function(type) { return box(types.hdlr, HDLR_TYPES[type]); }; mdat = function(data) { return box(types.mdat, data); }; mdhd = function(track) { var result = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x02, // creation_time 0x00, 0x00, 0x00, 0x03, // modification_time 0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 "ticks" per second (track.duration >>> 24) & 0xFF, (track.duration >>> 16) & 0xFF, (track.duration >>> 8) & 0xFF, track.duration & 0xFF, // duration 0x55, 0xc4, // 'und' language (undetermined) 0x00, 0x00 ]); // Use the sample rate from the track metadata, when it is // defined. The sample rate can be parsed out of an ADTS header, for // instance. if (track.samplerate) { result[12] = (track.samplerate >>> 24) & 0xFF; result[13] = (track.samplerate >>> 16) & 0xFF; result[14] = (track.samplerate >>> 8) & 0xFF; result[15] = (track.samplerate) & 0xFF; } return box(types.mdhd, result); }; mdia = function(track) { return box(types.mdia, mdhd(track), hdlr(track.type), minf(track)); }; mfhd = function(sequenceNumber) { return box(types.mfhd, new Uint8Array([ 0x00, 0x00, 0x00, 0x00, // flags (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number ])); }; minf = function(track) { return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track)); }; moof = function(sequenceNumber, tracks) { var trackFragments = [], i = tracks.length; // build traf boxes for each track fragment while (i--) { trackFragments[i] = traf(tracks[i]); } return box.apply(null, [ types.moof, mfhd(sequenceNumber) ].concat(trackFragments)); }; /** * Returns a movie box. * @param tracks {array} the tracks associated with this movie * @see ISO/IEC 14496-12:2012(E), section 8.2.1 */ moov = function(tracks) { var i = tracks.length, boxes = []; while (i--) { boxes[i] = trak(tracks[i]); } return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks))); }; mvex = function(tracks) { var i = tracks.length, boxes = []; while (i--) { boxes[i] = trex(tracks[i]); } return box.apply(null, [types.mvex].concat(boxes)); }; mvhd = function(duration) { var bytes = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x01, // creation_time 0x00, 0x00, 0x00, 0x02, // modification_time 0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 "ticks" per second (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration 0x00, 0x01, 0x00, 0x00, // 1.0 rate 0x01, 0x00, // 1.0 volume 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved 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, // transformation: unity matrix 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined 0xff, 0xff, 0xff, 0xff // next_track_ID ]); return box(types.mvhd, bytes); }; sdtp = function(track) { var samples = track.samples || [], bytes = new Uint8Array(4 + samples.length), flags, i; // leave the full box header (4 bytes) all zero // write the sample table for (i = 0; i < samples.length; i++) { flags = samples[i].flags; bytes[i + 4] = (flags.dependsOn << 4) | (flags.isDependedOn << 2) | (flags.hasRedundancy); } return box(types.sdtp, bytes); }; stbl = function(track) { return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO)); }; (function() { var videoSample, audioSample; stsd = function(track) { return box(types.stsd, new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags 0x00, 0x00, 0x00, 0x01 ]), track.type === 'video' ? videoSample(track) : audioSample(track)); }; videoSample = function(track) { var sps = track.sps || [], pps = track.pps || [], sequenceParameterSets = [], pictureParameterSets = [], i; // assemble the SPSs for (i = 0; i < sps.length; i++) { sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8); sequenceParameterSets.push((sps[i].byteLength & 0xFF)); // sequenceParameterSetLength sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS } // assemble the PPSs for (i = 0; i < pps.length; i++) { pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8); pictureParameterSets.push((pps[i].byteLength & 0xFF)); pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i])); } return box(types.avc1, new Uint8Array([ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x01, // data_reference_index 0x00, 0x00, // pre_defined 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined (track.width & 0xff00) >> 8, track.width & 0xff, // width (track.height & 0xff00) >> 8, track.height & 0xff, // height 0x00, 0x48, 0x00, 0x00, // horizresolution 0x00, 0x48, 0x00, 0x00, // vertresolution 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x01, // frame_count 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, // compressorname 0x00, 0x18, // depth = 24 0x11, 0x11 // pre_defined = -1 ]), box(types.avcC, new Uint8Array([ 0x01, // configurationVersion track.profileIdc, // AVCProfileIndication track.profileCompatibility, // profile_compatibility track.levelIdc, // AVCLevelIndication 0xff // lengthSizeMinusOne, hard-coded to 4 bytes ].concat([ sps.length // numOfSequenceParameterSets ]).concat(sequenceParameterSets).concat([ pps.length // numOfPictureParameterSets ]).concat(pictureParameterSets))), // "PPS" box(types.btrt, new Uint8Array([ 0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB 0x00, 0x2d, 0xc6, 0xc0, // maxBitrate 0x00, 0x2d, 0xc6, 0xc0 ])) // avgBitrate ); }; audioSample = function(track) { return box(types.mp4a, new Uint8Array([ // SampleEntry, ISO/IEC 14496-12 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x01, // data_reference_index // AudioSampleEntry, ISO/IEC 14496-12 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, 0x00, 0x00, // reserved (track.channelcount & 0xff00) >> 8, (track.channelcount & 0xff), // channelcount (track.samplesize & 0xff00) >> 8, (track.samplesize & 0xff), // samplesize 0x00, 0x00, // pre_defined 0x00, 0x00, // reserved (track.samplerate & 0xff00) >> 8, (track.samplerate & 0xff), 0x00, 0x00 // samplerate, 16.16 // MP4AudioSampleEntry, ISO/IEC 14496-14 ]), esds(track)); }; }()); tkhd = function(track) { var result = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x07, // flags 0x00, 0x00, 0x00, 0x00, // creation_time 0x00, 0x00, 0x00, 0x00, // modification_time (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID 0x00, 0x00, 0x00, 0x00, // reserved (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved 0x00, 0x00, // layer 0x00, 0x00, // alternate_group 0x01, 0x00, // non-audio track volume 0x00, 0x00, // reserved 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, // transformation: unity matrix (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height ]); return box(types.tkhd, result); }; /** * Generate a track fragment (traf) box. A traf box collects metadata * about tracks in a movie fragment (moof) box. */ traf = function(track) { var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime; trackFragmentHeader = box(types.tfhd, new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x3a, // flags (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, (track.id & 0xFF), // track_ID 0x00, 0x00, 0x00, 0x01, // sample_description_index 0x00, 0x00, 0x00, 0x00, // default_sample_duration 0x00, 0x00, 0x00, 0x00, // default_sample_size 0x00, 0x00, 0x00, 0x00 // default_sample_flags ])); upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / (UINT32_MAX + 1)); lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % (UINT32_MAX + 1)); trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([ 0x01, // version 1 0x00, 0x00, 0x00, // flags // baseMediaDecodeTime (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 // the containing moof to the first payload byte of the associated // mdat dataOffset = (32 + // tfhd 20 + // tfdt 8 + // traf header 16 + // mfhd 8 + // moof header 8); // mdat header // audio tracks require less metadata if (track.type === 'audio') { trackFragmentRun = trun(track, dataOffset); return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun); } // video tracks should contain an independent and disposable samples // box (sdtp) // generate one and adjust offsets to match sampleDependencyTable = sdtp(track); trackFragmentRun = trun(track, sampleDependencyTable.length + dataOffset); return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable); }; /** * Generate a track box. * @param track {object} a track definition * @return {Uint8Array} the track box */ trak = function(track) { track.duration = track.duration || 0xffffffff; return box(types.trak, tkhd(track), mdia(track)); }; trex = function(track) { var result = new Uint8Array([ 0x00, // version 0 0x00, 0x00, 0x00, // flags (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, (track.id & 0xFF), // track_ID 0x00, 0x00, 0x00, 0x01, // default_sample_description_index 0x00, 0x00, 0x00, 0x00, // default_sample_duration 0x00, 0x00, 0x00, 0x00, // default_sample_size 0x00, 0x01, 0x00, 0x01 // default_sample_flags ]); // the last two bytes of default_sample_flags is the sample // degradation priority, a hint about the importance of this sample // relative to others. Lower the degradation priority for all sample // types other than video. if (track.type !== 'video') { result[result.length - 1] = 0x00; } return box(types.trex, result); }; (function() { var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a // duration is present for the first sample, it will be present for // all subsequent samples. // see ISO/IEC 14496-12:2012, Section 8.8.8.1 trunHeader = function(samples, offset) { var durationPresent = 0, sizePresent = 0, flagsPresent = 0, compositionTimeOffset = 0; // trun flag constants if (samples.length) { if (samples[0].duration !== undefined) { durationPresent = 0x1; } if (samples[0].size !== undefined) { sizePresent = 0x2; } if (samples[0].flags !== undefined) { flagsPresent = 0x4; } if (samples[0].compositionTimeOffset !== undefined) { compositionTimeOffset = 0x8; } } return [ 0x00, // version 0 0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset ]; }; videoTrun = function(track, offset) { var bytes, samples, sample, i; samples = track.samples || []; offset += 8 + 12 + (16 * samples.length); bytes = trunHeader(samples, offset); for (i = 0; i < samples.length; i++) { sample = samples[i]; bytes = bytes.concat([ (sample.duration & 0xFF000000) >>> 24, (sample.duration & 0xFF0000) >>> 16, (sample.duration & 0xFF00) >>> 8, sample.duration & 0xFF, // sample_duration (sample.size & 0xFF000000) >>> 24, (sample.size & 0xFF0000) >>> 16, (sample.size & 0xFF00) >>> 8, sample.size & 0xFF, // sample_size (sample.flags.isLeading << 2) | sample.flags.dependsOn, (sample.flags.isDependedOn << 6) | (sample.flags.hasRedundancy << 4) | (sample.flags.paddingValue << 1) | sample.flags.isNonSyncSample, sample.flags.degradationPriority & 0xF0 << 8, sample.flags.degradationPriority & 0x0F, // sample_flags (sample.compositionTimeOffset & 0xFF000000) >>> 24, (sample.compositionTimeOffset & 0xFF0000) >>> 16, (sample.compositionTimeOffset & 0xFF00) >>> 8, sample.compositionTimeOffset & 0xFF // sample_composition_time_offset ]); } return box(types.trun, new Uint8Array(bytes)); }; audioTrun = function(track, offset) { var bytes, samples, sample, i; samples = track.samples || []; offset += 8 + 12 + (8 * samples.length); bytes = trunHeader(samples, offset); for (i = 0; i < samples.length; i++) { sample = samples[i]; bytes = bytes.concat([ (sample.duration & 0xFF000000) >>> 24, (sample.duration & 0xFF0000) >>> 16, (sample.duration & 0xFF00) >>> 8, sample.duration & 0xFF, // sample_duration (sample.size & 0xFF000000) >>> 24, (sample.size & 0xFF0000) >>> 16, (sample.size & 0xFF00) >>> 8, sample.size & 0xFF]); // sample_size } return box(types.trun, new Uint8Array(bytes)); }; trun = function(track, offset) { if (track.type === 'audio') { return audioTrun(track, offset); } return videoTrun(track, offset); }; }()); module.exports = { ftyp: ftyp, mdat: mdat, moof: moof, moov: moov, initSegment: function(tracks) { var fileType = ftyp(), movie = moov(tracks), result; result = new Uint8Array(fileType.byteLength + movie.byteLength); result.set(fileType); result.set(movie, fileType.byteLength); return result; } }; },{}],55:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2015 Brightcove * All rights reserved. * * Utilities to detect basic properties and metadata about MP4s. */ 'use strict'; var findBox, parseType, timescale, startTime; // Find the data for a box specified by its path findBox = function(data, path) { var results = [], i, size, type, end, subresults; if (!path.length) { // short-circuit the search for empty paths return null; } for (i = 0; i < data.byteLength;) { size = data[i] << 24; size |= data[i + 1] << 16; size |= data[i + 2] << 8; size |= data[i + 3]; type = parseType(data.subarray(i + 4, i + 8)); end = size > 1 ? i + size : data.byteLength; if (type === path[0]) { if (path.length === 1) { // this is the end of the path and we've found the box we were // looking for results.push(data.subarray(i + 8, end)); } else { // recursively search for the next box along the path subresults = findBox(data.subarray(i + 8, end), path.slice(1)); if (subresults.length) { results = results.concat(subresults); } } } i = end; } // we've finished searching all of data return results; }; /** * Returns the string representation of an ASCII encoded four byte buffer. * @param buffer {Uint8Array} a four-byte buffer to translate * @return {string} the corresponding string */ parseType = function(buffer) { var result = ''; result += String.fromCharCode(buffer[0]); result += String.fromCharCode(buffer[1]); result += String.fromCharCode(buffer[2]); result += String.fromCharCode(buffer[3]); return result; }; /** * Parses an MP4 initialization segment and extracts the timescale * values for any declared tracks. Timescale values indicate the * number of clock ticks per second to assume for time-based values * elsewhere in the MP4. * * To determine the start time of an MP4, you need two pieces of * information: the timescale unit and the earliest base media decode * time. Multiple timescales can be specified within an MP4 but the * base media decode time is always expressed in the timescale from * the media header box for the track: * ``` * moov > trak > mdia > mdhd.timescale * ``` * @param init {Uint8Array} the bytes of the init segment * @return {object} a hash of track ids to timescale values or null if * the init segment is malformed. */ timescale = function(init) { var result = {}, traks = findBox(init, ['moov', 'trak']); // mdhd timescale return traks.reduce(function(result, trak) { var tkhd, version, index, id, mdhd; tkhd = findBox(trak, ['tkhd'])[0]; if (!tkhd) { return null; } version = tkhd[0]; index = version === 0 ? 12 : 20; id = tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]; mdhd = findBox(trak, ['mdia', 'mdhd'])[0]; if (!mdhd) { return null; } version = mdhd[0]; index = version === 0 ? 12 : 20; result[id] = mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]; return result; }, result); }; /** * Determine the base media decode start time, in seconds, for an MP4 * fragment. If multiple fragments are specified, the earliest time is * returned. * * The base media decode time can be parsed from track fragment * metadata: * ``` * moof > traf > tfdt.baseMediaDecodeTime * ``` * It requires the timescale value from the mdhd to interpret. * * @param timescale {object} a hash of track ids to timescale values. * @return {number} the earliest base media decode start time for the * fragment, in seconds */ startTime = function(timescale, fragment) { var trafs, baseTimes, result; // we need info from two childrend of each track fragment box trafs = findBox(fragment, ['moof', 'traf']); // determine the start times for each track baseTimes = [].concat.apply([], trafs.map(function(traf) { return findBox(traf, ['tfhd']).map(function(tfhd) { var id, scale, baseTime; // get the track id from the tfhd id = tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]; // assume a 90kHz clock if no timescale was specified scale = timescale[id] || 90e3; // get the base media decode time from the tfdt baseTime = findBox(traf, ['tfdt']).map(function(tfdt) { var version, result; version = tfdt[0]; result = tfdt[4] << 24 | tfdt[5] << 16 | tfdt[6] << 8 | tfdt[7]; if (version === 1) { result *= Math.pow(2, 32); result += tfdt[8] << 24 | tfdt[9] << 16 | tfdt[10] << 8 | tfdt[11]; } return result; })[0]; baseTime = baseTime || Infinity; // convert base time to seconds return baseTime / scale; }); })); // return the minimum result = Math.min.apply(null, baseTimes); return isFinite(result) ? result : 0; }; module.exports = { parseType: parseType, timescale: timescale, startTime: startTime }; },{}],56:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2015 Brightcove * All rights reserved. * * A stream-based mp2t to mp4 converter. This utility can be used to * deliver mp4s to a SourceBuffer on platforms that support native * Media Source Extensions. */ 'use strict'; var Stream = require('../utils/stream.js'); var mp4 = require('./mp4-generator.js'); var m2ts = require('../m2ts/m2ts.js'); var AdtsStream = require('../codecs/adts.js'); var H264Stream = require('../codecs/h264').H264Stream; var AacStream = require('../aac'); var coneOfSilence = require('../data/silence'); var clock = require('../utils/clock'); // constants var AUDIO_PROPERTIES = [ 'audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize' ]; var VIDEO_PROPERTIES = [ 'width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility' ]; var ONE_SECOND_IN_TS = 90000; // 90kHz clock // object types var VideoSegmentStream, AudioSegmentStream, Transmuxer, CoalesceStream; // Helper functions var createDefaultSample, isLikelyAacData, collectDtsInfo, clearDtsInfo, calculateTrackBaseMediaDecodeTime, arrayEquals, sumFrameByteLengths; /** * Default sample object * see ISO/IEC 14496-12:2012, section 8.6.4.3 */ createDefaultSample = function() { return { size: 0, flags: { isLeading: 0, dependsOn: 1, isDependedOn: 0, hasRedundancy: 0, degradationPriority: 0 } }; }; isLikelyAacData = function(data) { if ((data[0] === 'I'.charCodeAt(0)) && (data[1] === 'D'.charCodeAt(0)) && (data[2] === '3'.charCodeAt(0))) { return true; } return false; }; /** * Compare two arrays (even typed) for same-ness */ arrayEquals = function(a, b) { var i; if (a.length !== b.length) { return false; } // compare the value of each element in the array for (i = 0; i < a.length; i++) { if (a[i] !== b[i]) { return false; } } return true; }; /** * Sum the `byteLength` properties of the data in each AAC frame */ sumFrameByteLengths = function(array) { var i, currentObj, sum = 0; // sum the byteLength's all each nal unit in the frame for (i = 0; i < array.length; i++) { currentObj = array[i]; sum += currentObj.data.byteLength; } return sum; }; /** * Constructs a single-track, ISO BMFF media segment from AAC data * events. The output of this stream can be fed to a SourceBuffer * configured with a suitable initialization segment. */ AudioSegmentStream = function(track) { var adtsFrames = [], sequenceNumber = 0, earliestAllowedDts = 0, audioAppendStartTs = 0, videoBaseMediaDecodeTime = Infinity; AudioSegmentStream.prototype.init.call(this); this.push = function(data) { collectDtsInfo(track, data); if (track) { AUDIO_PROPERTIES.forEach(function(prop) { track[prop] = data[prop]; }); } // buffer audio data until end() is called adtsFrames.push(data); }; this.setEarliestDts = function(earliestDts) { earliestAllowedDts = earliestDts - track.timelineStartInfo.baseMediaDecodeTime; }; this.setVideoBaseMediaDecodeTime = function(baseMediaDecodeTime) { videoBaseMediaDecodeTime = baseMediaDecodeTime; }; this.setAudioAppendStart = function(timestamp) { audioAppendStartTs = timestamp; }; this.flush = function() { var frames, moof, mdat, boxes; // return early if no audio data has been observed if (adtsFrames.length === 0) { this.trigger('done', 'AudioSegmentStream'); return; } frames = this.trimAdtsFramesByEarliestDts_(adtsFrames); track.baseMediaDecodeTime = calculateTrackBaseMediaDecodeTime(track); this.prefixWithSilence_(track, frames); // we have to build the index from byte locations to // samples (that is, adts frames) in the audio data track.samples = this.generateSampleTable_(frames); // concatenate the audio data to constuct the mdat mdat = mp4.mdat(this.concatenateFrameData_(frames)); adtsFrames = []; moof = mp4.moof(sequenceNumber, [track]); boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time sequenceNumber++; boxes.set(moof); boxes.set(mdat, moof.byteLength); clearDtsInfo(track); this.trigger('data', {track: track, boxes: boxes}); this.trigger('done', 'AudioSegmentStream'); }; // Possibly pad (prefix) the audio track with silence if appending this track // would lead to the introduction of a gap in the audio buffer this.prefixWithSilence_ = function(track, frames) { var baseMediaDecodeTimeTs, frameDuration = 0, audioGapDuration = 0, audioFillFrameCount = 0, audioFillDuration = 0, silentFrame, i; if (!frames.length) { return; } baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills frameDuration = Math.ceil(ONE_SECOND_IN_TS / (track.samplerate / 1024)); if (audioAppendStartTs && videoBaseMediaDecodeTime) { // insert the shortest possible amount (audio gap or audio to video gap) audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap audioFillFrameCount = Math.floor(audioGapDuration / frameDuration); audioFillDuration = audioFillFrameCount * frameDuration; } // don't attempt to fill gaps smaller than a single frame or larger // than a half second if (audioFillFrameCount < 1 || audioFillDuration > ONE_SECOND_IN_TS / 2) { return; } silentFrame = coneOfSilence[track.samplerate]; if (!silentFrame) { // we don't have a silent frame pregenerated for the sample rate, so use a frame // from the content instead silentFrame = frames[0].data; } for (i = 0; i < audioFillFrameCount; i++) { frames.splice(i, 0, { data: silentFrame }); } track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate)); }; // If the audio segment extends before the earliest allowed dts // value, remove AAC frames until starts at or after the earliest // allowed DTS so that we don't end up with a negative baseMedia- // DecodeTime for the audio track this.trimAdtsFramesByEarliestDts_ = function(adtsFrames) { if (track.minSegmentDts >= earliestAllowedDts) { return adtsFrames; } // We will need to recalculate the earliest segment Dts track.minSegmentDts = Infinity; return adtsFrames.filter(function(currentFrame) { // If this is an allowed frame, keep it and record it's Dts if (currentFrame.dts >= earliestAllowedDts) { track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts); track.minSegmentPts = track.minSegmentDts; return true; } // Otherwise, discard it return false; }); }; // generate the track's raw mdat data from an array of frames this.generateSampleTable_ = function(frames) { var i, currentFrame, samples = []; for (i = 0; i < frames.length; i++) { currentFrame = frames[i]; samples.push({ size: currentFrame.data.byteLength, duration: 1024 // For AAC audio, all samples contain 1024 samples }); } return samples; }; // generate the track's sample table from an array of frames this.concatenateFrameData_ = function(frames) { var i, currentFrame, dataOffset = 0, data = new Uint8Array(sumFrameByteLengths(frames)); for (i = 0; i < frames.length; i++) { currentFrame = frames[i]; data.set(currentFrame.data, dataOffset); dataOffset += currentFrame.data.byteLength; } return data; }; }; AudioSegmentStream.prototype = new Stream(); /** * Constructs a single-track, ISO BMFF media segment from H264 data * events. The output of this stream can be fed to a SourceBuffer * configured with a suitable initialization segment. * @param track {object} track metadata configuration */ VideoSegmentStream = function(track) { var sequenceNumber = 0, nalUnits = [], config, pps; VideoSegmentStream.prototype.init.call(this); delete track.minPTS; this.gopCache_ = []; this.push = function(nalUnit) { collectDtsInfo(track, nalUnit); // record the track config if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) { config = nalUnit.config; track.sps = [nalUnit.data]; VIDEO_PROPERTIES.forEach(function(prop) { track[prop] = config[prop]; }, this); } if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) { pps = nalUnit.data; track.pps = [nalUnit.data]; } // buffer video until flush() is called nalUnits.push(nalUnit); }; this.flush = function() { var frames, gopForFusion, gops, moof, mdat, boxes; // Throw away nalUnits at the start of the byte stream until // we find the first AUD while (nalUnits.length) { if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') { break; } nalUnits.shift(); } // Return early if no video data has been observed if (nalUnits.length === 0) { this.resetStream_(); this.trigger('done', 'VideoSegmentStream'); return; } // Organize the raw nal-units into arrays that represent // higher-level constructs such as frames and gops // (group-of-pictures) frames = this.groupNalsIntoFrames_(nalUnits); gops = this.groupFramesIntoGops_(frames); // If the first frame of this fragment is not a keyframe we have // a problem since MSE (on Chrome) requires a leading keyframe. // // We have two approaches to repairing this situation: // 1) GOP-FUSION: // This is where we keep track of the GOPS (group-of-pictures) // from previous fragments and attempt to find one that we can // prepend to the current fragment in order to create a valid // fragment. // 2) KEYFRAME-PULLING: // Here we search for the first keyframe in the fragment and // throw away all the frames between the start of the fragment // and that keyframe. We then extend the duration and pull the // PTS of the keyframe forward so that it covers the time range // of the frames that were disposed of. // // #1 is far prefereable over #2 which can cause "stuttering" but // requires more things to be just right. if (!gops[0][0].keyFrame) { // Search for a gop for fusion from our gopCache gopForFusion = this.getGopForFusion_(nalUnits[0], track); if (gopForFusion) { gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the // new gop at the beginning gops.byteLength += gopForFusion.byteLength; gops.nalCount += gopForFusion.nalCount; gops.pts = gopForFusion.pts; gops.dts = gopForFusion.dts; gops.duration += gopForFusion.duration; } else { // If we didn't find a candidate gop fall back to keyrame-pulling gops = this.extendFirstKeyFrame_(gops); } } collectDtsInfo(track, gops); // First, we have to build the index from byte locations to // samples (that is, frames) in the video data track.samples = this.generateSampleTable_(gops); // Concatenate the video data and construct the mdat mdat = mp4.mdat(this.concatenateNalData_(gops)); // save all the nals in the last GOP into the gop cache this.gopCache_.unshift({ gop: gops.pop(), pps: track.pps, sps: track.sps }); // Keep a maximum of 6 GOPs in the cache this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits nalUnits = []; track.baseMediaDecodeTime = calculateTrackBaseMediaDecodeTime(track); this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime); this.trigger('timelineStartInfo', track.timelineStartInfo); moof = mp4.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of // throwing away hundreds of media segment fragments boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time sequenceNumber++; boxes.set(moof); boxes.set(mdat, moof.byteLength); this.trigger('data', {track: track, boxes: boxes}); this.resetStream_(); // Continue with the flush process now this.trigger('done', 'VideoSegmentStream'); }; this.resetStream_ = function() { clearDtsInfo(track); // reset config and pps because they may differ across segments // for instance, when we are rendition switching config = undefined; pps = undefined; }; // Search for a candidate Gop for gop-fusion from the gop cache and // return it or return null if no good candidate was found this.getGopForFusion_ = function(nalUnit) { var halfSecond = 45000, // Half-a-second in a 90khz clock allowableOverlap = 10000, // About 3 frames @ 30fps nearestDistance = Infinity, dtsDistance, nearestGopObj, currentGop, currentGopObj, i; // Search for the GOP nearest to the beginning of this nal unit for (i = 0; i < this.gopCache_.length; i++) { currentGopObj = this.gopCache_[i]; currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) { continue; } // Reject Gops that would require a negative baseMediaDecodeTime if (currentGop.dts < track.timelineStartInfo.dts) { continue; } // The distance between the end of the gop and the start of the nalUnit dtsDistance = (nalUnit.dts - currentGop.dts) - currentGop.duration; // Only consider GOPS that start before the nal unit and end within // a half-second of the nal unit if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) { // Always use the closest GOP we found if there is more than // one candidate if (!nearestGopObj || nearestDistance > dtsDistance) { nearestGopObj = currentGopObj; nearestDistance = dtsDistance; } } } if (nearestGopObj) { return nearestGopObj.gop; } return null; }; this.extendFirstKeyFrame_ = function(gops) { var currentGop; if (!gops[0][0].keyFrame && gops.length > 1) { // Remove the first GOP currentGop = gops.shift(); gops.byteLength -= currentGop.byteLength; gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the // first gop to cover the time period of the // frames we just removed gops[0][0].dts = currentGop.dts; gops[0][0].pts = currentGop.pts; gops[0][0].duration += currentGop.duration; } return gops; }; // Convert an array of nal units into an array of frames with each frame being // composed of the nal units that make up that frame // Also keep track of cummulative data about the frame from the nal units such // as the frame duration, starting pts, etc. this.groupNalsIntoFrames_ = function(nalUnits) { var i, currentNal, currentFrame = [], frames = []; currentFrame.byteLength = 0; for (i = 0; i < nalUnits.length; i++) { currentNal = nalUnits[i]; // Split on 'aud'-type nal units if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') { // Since the very first nal unit is expected to be an AUD // only push to the frames array when currentFrame is not empty if (currentFrame.length) { currentFrame.duration = currentNal.dts - currentFrame.dts; frames.push(currentFrame); } currentFrame = [currentNal]; currentFrame.byteLength = currentNal.data.byteLength; currentFrame.pts = currentNal.pts; currentFrame.dts = currentNal.dts; } else { // Specifically flag key frames for ease of use later if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') { currentFrame.keyFrame = true; } currentFrame.duration = currentNal.dts - currentFrame.dts; currentFrame.byteLength += currentNal.data.byteLength; currentFrame.push(currentNal); } } // For the last frame, use the duration of the previous frame if we // have nothing better to go on if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) { currentFrame.duration = frames[frames.length - 1].duration; } // Push the final frame frames.push(currentFrame); return frames; }; // Convert an array of frames into an array of Gop with each Gop being composed // of the frames that make up that Gop // Also keep track of cummulative data about the Gop from the frames such as the // Gop duration, starting pts, etc. this.groupFramesIntoGops_ = function(frames) { var i, currentFrame, currentGop = [], gops = []; // We must pre-set some of the values on the Gop since we // keep running totals of these values currentGop.byteLength = 0; currentGop.nalCount = 0; currentGop.duration = 0; currentGop.pts = frames[0].pts; currentGop.dts = frames[0].dts; // store some metadata about all the Gops gops.byteLength = 0; gops.nalCount = 0; gops.duration = 0; gops.pts = frames[0].pts; gops.dts = frames[0].dts; for (i = 0; i < frames.length; i++) { currentFrame = frames[i]; if (currentFrame.keyFrame) { // Since the very first frame is expected to be an keyframe // only push to the gops array when currentGop is not empty if (currentGop.length) { gops.push(currentGop); gops.byteLength += currentGop.byteLength; gops.nalCount += currentGop.nalCount; gops.duration += currentGop.duration; } currentGop = [currentFrame]; currentGop.nalCount = currentFrame.length; currentGop.byteLength = currentFrame.byteLength; currentGop.pts = currentFrame.pts; currentGop.dts = currentFrame.dts; currentGop.duration = currentFrame.duration; } else { currentGop.duration += currentFrame.duration; currentGop.nalCount += currentFrame.length; currentGop.byteLength += currentFrame.byteLength; currentGop.push(currentFrame); } } if (gops.length && currentGop.duration <= 0) { currentGop.duration = gops[gops.length - 1].duration; } gops.byteLength += currentGop.byteLength; gops.nalCount += currentGop.nalCount; gops.duration += currentGop.duration; // push the final Gop gops.push(currentGop); return gops; }; // generate the track's sample table from an array of gops this.generateSampleTable_ = function(gops, baseDataOffset) { var h, i, sample, currentGop, currentFrame, dataOffset = baseDataOffset || 0, samples = []; for (h = 0; h < gops.length; h++) { currentGop = gops[h]; for (i = 0; i < currentGop.length; i++) { currentFrame = currentGop[i]; sample = createDefaultSample(); sample.dataOffset = dataOffset; sample.compositionTimeOffset = currentFrame.pts - currentFrame.dts; sample.duration = currentFrame.duration; sample.size = 4 * currentFrame.length; // Space for nal unit size sample.size += currentFrame.byteLength; if (currentFrame.keyFrame) { sample.flags.dependsOn = 2; } dataOffset += sample.size; samples.push(sample); } } return samples; }; // generate the track's raw mdat data from an array of gops this.concatenateNalData_ = function(gops) { var h, i, j, currentGop, currentFrame, currentNal, dataOffset = 0, nalsByteLength = gops.byteLength, numberOfNals = gops.nalCount, totalByteLength = nalsByteLength + 4 * numberOfNals, data = new Uint8Array(totalByteLength), view = new DataView(data.buffer); // For each Gop.. for (h = 0; h < gops.length; h++) { currentGop = gops[h]; // For each Frame.. for (i = 0; i < currentGop.length; i++) { currentFrame = currentGop[i]; // For each NAL.. for (j = 0; j < currentFrame.length; j++) { currentNal = currentFrame[j]; view.setUint32(dataOffset, currentNal.data.byteLength); dataOffset += 4; data.set(currentNal.data, dataOffset); dataOffset += currentNal.data.byteLength; } } } return data; }; }; VideoSegmentStream.prototype = new Stream(); /** * Store information about the start and end of the track and the * duration for each frame/sample we process in order to calculate * the baseMediaDecodeTime */ collectDtsInfo = function(track, data) { if (typeof data.pts === 'number') { if (track.timelineStartInfo.pts === undefined) { track.timelineStartInfo.pts = data.pts; } if (track.minSegmentPts === undefined) { track.minSegmentPts = data.pts; } else { track.minSegmentPts = Math.min(track.minSegmentPts, data.pts); } if (track.maxSegmentPts === undefined) { track.maxSegmentPts = data.pts; } else { track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts); } } if (typeof data.dts === 'number') { if (track.timelineStartInfo.dts === undefined) { track.timelineStartInfo.dts = data.dts; } if (track.minSegmentDts === undefined) { track.minSegmentDts = data.dts; } else { track.minSegmentDts = Math.min(track.minSegmentDts, data.dts); } if (track.maxSegmentDts === undefined) { track.maxSegmentDts = data.dts; } else { track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts); } } }; /** * Clear values used to calculate the baseMediaDecodeTime between * tracks */ clearDtsInfo = function(track) { delete track.minSegmentDts; delete track.maxSegmentDts; delete track.minSegmentPts; delete track.maxSegmentPts; }; /** * Calculate the track's baseMediaDecodeTime based on the earliest * DTS the transmuxer has ever seen and the minimum DTS for the * current track */ calculateTrackBaseMediaDecodeTime = function(track) { var baseMediaDecodeTime, scale, // Calculate the distance, in time, that this segment starts from the start // of the timeline (earliest time seen since the transmuxer initialized) timeSinceStartOfTimeline = track.minSegmentDts - track.timelineStartInfo.dts; // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where // we want the start of the first segment to be placed baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first baseMediaDecodeTime += timeSinceStartOfTimeline; // baseMediaDecodeTime must not become negative baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime); if (track.type === 'audio') { // Audio has a different clock equal to the sampling_rate so we need to // scale the PTS values into the clock rate of the track scale = track.samplerate / ONE_SECOND_IN_TS; baseMediaDecodeTime *= scale; baseMediaDecodeTime = Math.floor(baseMediaDecodeTime); } return baseMediaDecodeTime; }; /** * A Stream that can combine multiple streams (ie. audio & video) * into a single output segment for MSE. Also supports audio-only * and video-only streams. */ CoalesceStream = function(options, metadataStream) { // Number of Tracks per output segment // If greater than 1, we combine multiple // tracks into a single segment this.numberOfTracks = 0; this.metadataStream = metadataStream; if (typeof options.remux !== 'undefined') { this.remuxTracks = !!options.remux; } else { this.remuxTracks = true; } this.pendingTracks = []; this.videoTrack = null; this.pendingBoxes = []; this.pendingCaptions = []; this.pendingMetadata = []; this.pendingBytes = 0; this.emittedTracks = 0; CoalesceStream.prototype.init.call(this); // Take output from multiple this.push = function(output) { // buffer incoming captions until the associated video segment // finishes if (output.text) { return this.pendingCaptions.push(output); } // buffer incoming id3 tags until the final flush if (output.frames) { return this.pendingMetadata.push(output); } // Add this track to the list of pending tracks and store // important information required for the construction of // the final segment this.pendingTracks.push(output.track); this.pendingBoxes.push(output.boxes); this.pendingBytes += output.boxes.byteLength; if (output.track.type === 'video') { this.videoTrack = output.track; } if (output.track.type === 'audio') { this.audioTrack = output.track; } }; }; CoalesceStream.prototype = new Stream(); CoalesceStream.prototype.flush = function(flushSource) { var offset = 0, event = { captions: [], metadata: [], info: {} }, caption, id3, initSegment, timelineStartPts = 0, i; if (this.pendingTracks.length < this.numberOfTracks) { if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') { // Return because we haven't received a flush from a data-generating // portion of the segment (meaning that we have only recieved meta-data // or captions.) return; } else if (this.remuxTracks) { // Return until we have enough tracks from the pipeline to remux (if we // are remuxing audio and video into a single MP4) return; } else if (this.pendingTracks.length === 0) { // In the case where we receive a flush without any data having been // received we consider it an emitted track for the purposes of coalescing // `done` events. // We do this for the case where there is an audio and video track in the // segment but no audio data. (seen in several playlists with alternate // audio tracks and no audio present in the main TS segments.) this.emittedTracks++; if (this.emittedTracks >= this.numberOfTracks) { this.trigger('done'); this.emittedTracks = 0; } return; } } if (this.videoTrack) { timelineStartPts = this.videoTrack.timelineStartInfo.pts; VIDEO_PROPERTIES.forEach(function(prop) { event.info[prop] = this.videoTrack[prop]; }, this); } else if (this.audioTrack) { timelineStartPts = this.audioTrack.timelineStartInfo.pts; AUDIO_PROPERTIES.forEach(function(prop) { event.info[prop] = this.audioTrack[prop]; }, this); } if (this.pendingTracks.length === 1) { event.type = this.pendingTracks[0].type; } else { event.type = 'combined'; } this.emittedTracks += this.pendingTracks.length; initSegment = mp4.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov // and track definitions event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together for (i = 0; i < this.pendingBoxes.length; i++) { event.data.set(this.pendingBoxes[i], offset); offset += this.pendingBoxes[i].byteLength; } // Translate caption PTS times into second offsets into the // video timeline for the segment for (i = 0; i < this.pendingCaptions.length; i++) { caption = this.pendingCaptions[i]; caption.startTime = (caption.startPts - timelineStartPts); caption.startTime /= 90e3; caption.endTime = (caption.endPts - timelineStartPts); caption.endTime /= 90e3; event.captions.push(caption); } // Translate ID3 frame PTS times into second offsets into the // video timeline for the segment for (i = 0; i < this.pendingMetadata.length; i++) { id3 = this.pendingMetadata[i]; id3.cueTime = (id3.pts - timelineStartPts); id3.cueTime /= 90e3; event.metadata.push(id3); } // We add this to every single emitted segment even though we only need // it for the first event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state this.pendingTracks.length = 0; this.videoTrack = null; this.pendingBoxes.length = 0; this.pendingCaptions.length = 0; this.pendingBytes = 0; this.pendingMetadata.length = 0; // Emit the built segment this.trigger('data', event); // Only emit `done` if all tracks have been flushed and emitted if (this.emittedTracks >= this.numberOfTracks) { this.trigger('done'); this.emittedTracks = 0; } }; /** * A Stream that expects MP2T binary data as input and produces * corresponding media segments, suitable for use with Media Source * Extension (MSE) implementations that support the ISO BMFF byte * stream format, like Chrome. */ Transmuxer = function(options) { var self = this, hasFlushed = true, videoTrack, audioTrack; Transmuxer.prototype.init.call(this); options = options || {}; this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0; this.transmuxPipeline_ = {}; this.setupAacPipeline = function() { var pipeline = {}; this.transmuxPipeline_ = pipeline; pipeline.type = 'aac'; pipeline.metadataStream = new m2ts.MetadataStream(); // set up the parsing pipeline pipeline.aacStream = new AacStream(); pipeline.audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio'); pipeline.timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata'); pipeline.adtsStream = new AdtsStream(); pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream); pipeline.headOfPipeline = pipeline.aacStream; pipeline.aacStream .pipe(pipeline.audioTimestampRolloverStream) .pipe(pipeline.adtsStream); pipeline.aacStream .pipe(pipeline.timedMetadataTimestampRolloverStream) .pipe(pipeline.metadataStream) .pipe(pipeline.coalesceStream); pipeline.metadataStream.on('timestamp', function(frame) { pipeline.aacStream.setTimestamp(frame.timeStamp); }); pipeline.aacStream.on('data', function(data) { if (data.type === 'timed-metadata' && !pipeline.audioSegmentStream) { audioTrack = audioTrack || { timelineStartInfo: { baseMediaDecodeTime: self.baseMediaDecodeTime }, codec: 'adts', type: 'audio' }; // hook up the audio segment stream to the first track with aac data pipeline.coalesceStream.numberOfTracks++; pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack); // Set up the final part of the audio pipeline pipeline.adtsStream .pipe(pipeline.audioSegmentStream) .pipe(pipeline.coalesceStream); } }); // Re-emit any data coming from the coalesce stream to the outside world pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done')); }; this.setupTsPipeline = function() { var pipeline = {}; this.transmuxPipeline_ = pipeline; pipeline.type = 'ts'; pipeline.metadataStream = new m2ts.MetadataStream(); // set up the parsing pipeline pipeline.packetStream = new m2ts.TransportPacketStream(); pipeline.parseStream = new m2ts.TransportParseStream(); pipeline.elementaryStream = new m2ts.ElementaryStream(); pipeline.videoTimestampRolloverStream = new m2ts.TimestampRolloverStream('video'); pipeline.audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio'); pipeline.timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata'); pipeline.adtsStream = new AdtsStream(); pipeline.h264Stream = new H264Stream(); pipeline.captionStream = new m2ts.CaptionStream(); pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream); pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams pipeline.packetStream .pipe(pipeline.parseStream) .pipe(pipeline.elementaryStream); // !!THIS ORDER IS IMPORTANT!! // demux the streams pipeline.elementaryStream .pipe(pipeline.videoTimestampRolloverStream) .pipe(pipeline.h264Stream); pipeline.elementaryStream .pipe(pipeline.audioTimestampRolloverStream) .pipe(pipeline.adtsStream); pipeline.elementaryStream .pipe(pipeline.timedMetadataTimestampRolloverStream) .pipe(pipeline.metadataStream) .pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream pipeline.h264Stream.pipe(pipeline.captionStream) .pipe(pipeline.coalesceStream); pipeline.elementaryStream.on('data', function(data) { var i; if (data.type === 'metadata') { i = data.tracks.length; // scan the tracks listed in the metadata while (i--) { if (!videoTrack && data.tracks[i].type === 'video') { videoTrack = data.tracks[i]; videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime; } else if (!audioTrack && data.tracks[i].type === 'audio') { audioTrack = data.tracks[i]; audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime; } } // hook up the video segment stream to the first track with h264 data if (videoTrack && !pipeline.videoSegmentStream) { pipeline.coalesceStream.numberOfTracks++; pipeline.videoSegmentStream = new VideoSegmentStream(videoTrack); pipeline.videoSegmentStream.on('timelineStartInfo', function(timelineStartInfo) { // When video emits timelineStartInfo data after a flush, we forward that // info to the AudioSegmentStream, if it exists, because video timeline // data takes precedence. if (audioTrack) { audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the // very earliest DTS we have seen in video because Chrome will // interpret any video track with a baseMediaDecodeTime that is // non-zero as a gap. pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts); } }); pipeline.videoSegmentStream.on('baseMediaDecodeTime', function(baseMediaDecodeTime) { if (audioTrack) { pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime); } }); // Set up the final part of the video pipeline pipeline.h264Stream .pipe(pipeline.videoSegmentStream) .pipe(pipeline.coalesceStream); } if (audioTrack && !pipeline.audioSegmentStream) { // hook up the audio segment stream to the first track with aac data pipeline.coalesceStream.numberOfTracks++; pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack); // Set up the final part of the audio pipeline pipeline.adtsStream .pipe(pipeline.audioSegmentStream) .pipe(pipeline.coalesceStream); } } }); // Re-emit any data coming from the coalesce stream to the outside world pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done')); }; // hook up the segment streams once track metadata is delivered this.setBaseMediaDecodeTime = function(baseMediaDecodeTime) { var pipeline = this.transmuxPipeline_; this.baseMediaDecodeTime = baseMediaDecodeTime; if (audioTrack) { audioTrack.timelineStartInfo.dts = undefined; audioTrack.timelineStartInfo.pts = undefined; clearDtsInfo(audioTrack); audioTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime; if (pipeline.audioTimestampRolloverStream) { pipeline.audioTimestampRolloverStream.discontinuity(); } } if (videoTrack) { if (pipeline.videoSegmentStream) { pipeline.videoSegmentStream.gopCache_ = []; pipeline.videoTimestampRolloverStream.discontinuity(); } videoTrack.timelineStartInfo.dts = undefined; videoTrack.timelineStartInfo.pts = undefined; clearDtsInfo(videoTrack); videoTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime; } if (pipeline.timedMetadataTimestampRolloverStream) { pipeline.timedMetadataTimestampRolloverStream.discontinuity(); } }; this.setAudioAppendStart = function(timestamp) { if (audioTrack) { this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp); } }; // feed incoming data to the front of the parsing pipeline this.push = function(data) { if (hasFlushed) { var isAac = isLikelyAacData(data); if (isAac && this.transmuxPipeline_.type !== 'aac') { this.setupAacPipeline(); } else if (!isAac && this.transmuxPipeline_.type !== 'ts') { this.setupTsPipeline(); } hasFlushed = false; } this.transmuxPipeline_.headOfPipeline.push(data); }; // flush any buffered data this.flush = function() { hasFlushed = true; // Start at the top of the pipeline and flush all pending work this.transmuxPipeline_.headOfPipeline.flush(); }; }; Transmuxer.prototype = new Stream(); module.exports = { Transmuxer: Transmuxer, VideoSegmentStream: VideoSegmentStream, AudioSegmentStream: AudioSegmentStream, AUDIO_PROPERTIES: AUDIO_PROPERTIES, VIDEO_PROPERTIES: VIDEO_PROPERTIES }; },{"../aac":36,"../codecs/adts.js":38,"../codecs/h264":39,"../data/silence":40,"../m2ts/m2ts.js":48,"../utils/clock":58,"../utils/stream.js":60,"./mp4-generator.js":54}],57:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2016 Brightcove * All rights reserved. * * Parse mpeg2 transport stream packets to extract basic timing information */ 'use strict'; var StreamTypes = require('../m2ts/stream-types.js'); var handleRollover = require('../m2ts/timestamp-rollover-stream.js').handleRollover; var probe = {}; probe.ts = require('../m2ts/probe.js'); probe.aac = require('../aac/probe.js'); var PES_TIMESCALE = 90000, MP2T_PACKET_LENGTH = 188, // bytes SYNC_BYTE = 0x47; var isLikelyAacData = function(data) { if ((data[0] === 'I'.charCodeAt(0)) && (data[1] === 'D'.charCodeAt(0)) && (data[2] === '3'.charCodeAt(0))) { return true; } return false; }; /** * walks through segment data looking for pat and pmt packets to parse out * program map table information */ var parsePsi_ = function(bytes, pmt) { var startIndex = 0, endIndex = MP2T_PACKET_LENGTH, packet, type; while (endIndex < bytes.byteLength) { // Look for a pair of start and end sync bytes in the data.. if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) { // We found a packet packet = bytes.subarray(startIndex, endIndex); type = probe.ts.parseType(packet, pmt.pid); switch (type) { case 'pat': if (!pmt.pid) { pmt.pid = probe.ts.parsePat(packet); } break; case 'pmt': if (!pmt.table) { pmt.table = probe.ts.parsePmt(packet); } break; default: break; } // Found the pat and pmt, we can stop walking the segment if (pmt.pid && pmt.table) { return; } startIndex += MP2T_PACKET_LENGTH; endIndex += MP2T_PACKET_LENGTH; continue; } // If we get here, we have somehow become de-synchronized and we need to step // forward one byte at a time until we find a pair of sync bytes that denote // a packet startIndex++; endIndex++; } }; /** * walks through the segment data from the start and end to get timing information * for the first and last audio pes packets */ var parseAudioPes_ = function(bytes, pmt, result) { var startIndex = 0, endIndex = MP2T_PACKET_LENGTH, packet, type, pesType, pusi, parsed; var endLoop = false; // Start walking from start of segment to get first audio packet while (endIndex < bytes.byteLength) { // Look for a pair of start and end sync bytes in the data.. if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) { // We found a packet packet = bytes.subarray(startIndex, endIndex); type = probe.ts.parseType(packet, pmt.pid); switch (type) { case 'pes': pesType = probe.ts.parsePesType(packet, pmt.table); pusi = probe.ts.parsePayloadUnitStartIndicator(packet); if (pesType === 'audio' && pusi) { parsed = probe.ts.parsePesTime(packet); parsed.type = 'audio'; result.audio.push(parsed); endLoop = true; } break; default: break; } if (endLoop) { break; } startIndex += MP2T_PACKET_LENGTH; endIndex += MP2T_PACKET_LENGTH; continue; } // If we get here, we have somehow become de-synchronized and we need to step // forward one byte at a time until we find a pair of sync bytes that denote // a packet startIndex++; endIndex++; } // Start walking from end of segment to get last audio packet endIndex = bytes.byteLength; startIndex = endIndex - MP2T_PACKET_LENGTH; endLoop = false; while (startIndex >= 0) { // Look for a pair of start and end sync bytes in the data.. if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) { // We found a packet packet = bytes.subarray(startIndex, endIndex); type = probe.ts.parseType(packet, pmt.pid); switch (type) { case 'pes': pesType = probe.ts.parsePesType(packet, pmt.table); pusi = probe.ts.parsePayloadUnitStartIndicator(packet); if (pesType === 'audio' && pusi) { parsed = probe.ts.parsePesTime(packet); parsed.type = 'audio'; result.audio.push(parsed); endLoop = true; } break; default: break; } if (endLoop) { break; } startIndex -= MP2T_PACKET_LENGTH; endIndex -= MP2T_PACKET_LENGTH; continue; } // If we get here, we have somehow become de-synchronized and we need to step // forward one byte at a time until we find a pair of sync bytes that denote // a packet startIndex--; endIndex--; } }; /** * walks through the segment data from the start and end to get timing information * for the first and last video pes packets as well as timing information for the first * key frame. */ var parseVideoPes_ = function(bytes, pmt, result) { var startIndex = 0, endIndex = MP2T_PACKET_LENGTH, packet, type, pesType, pusi, parsed, frame, i, pes; var endLoop = false; var currentFrame = { data: [], size: 0 }; // Start walking from start of segment to get first video packet while (endIndex < bytes.byteLength) { // Look for a pair of start and end sync bytes in the data.. if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) { // We found a packet packet = bytes.subarray(startIndex, endIndex); type = probe.ts.parseType(packet, pmt.pid); switch (type) { case 'pes': pesType = probe.ts.parsePesType(packet, pmt.table); pusi = probe.ts.parsePayloadUnitStartIndicator(packet); if (pesType === 'video') { if (pusi && !endLoop) { parsed = probe.ts.parsePesTime(packet); parsed.type = 'video'; result.video.push(parsed); endLoop = true; } if (!result.firstKeyFrame) { if (pusi) { if (currentFrame.size !== 0) { frame = new Uint8Array(currentFrame.size); i = 0; while (currentFrame.data.length) { pes = currentFrame.data.shift(); frame.set(pes, i); i += pes.byteLength; } if (probe.ts.videoPacketContainsKeyFrame(frame)) { result.firstKeyFrame = probe.ts.parsePesTime(frame); result.firstKeyFrame.type = 'video'; } currentFrame.size = 0; } } currentFrame.data.push(packet); currentFrame.size += packet.byteLength; } } break; default: break; } if (endLoop && result.firstKeyFrame) { break; } startIndex += MP2T_PACKET_LENGTH; endIndex += MP2T_PACKET_LENGTH; continue; } // If we get here, we have somehow become de-synchronized and we need to step // forward one byte at a time until we find a pair of sync bytes that denote // a packet startIndex++; endIndex++; } // Start walking from end of segment to get last video packet endIndex = bytes.byteLength; startIndex = endIndex - MP2T_PACKET_LENGTH; endLoop = false; while (startIndex >= 0) { // Look for a pair of start and end sync bytes in the data.. if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) { // We found a packet packet = bytes.subarray(startIndex, endIndex); type = probe.ts.parseType(packet, pmt.pid); switch (type) { case 'pes': pesType = probe.ts.parsePesType(packet, pmt.table); pusi = probe.ts.parsePayloadUnitStartIndicator(packet); if (pesType === 'video' && pusi) { parsed = probe.ts.parsePesTime(packet); parsed.type = 'video'; result.video.push(parsed); endLoop = true; } break; default: break; } if (endLoop) { break; } startIndex -= MP2T_PACKET_LENGTH; endIndex -= MP2T_PACKET_LENGTH; continue; } // If we get here, we have somehow become de-synchronized and we need to step // forward one byte at a time until we find a pair of sync bytes that denote // a packet startIndex--; endIndex--; } }; /** * Adjusts the timestamp information for the segment to account for * rollover and convert to seconds based on pes packet timescale (90khz clock) */ var adjustTimestamp_ = function(segmentInfo, baseTimestamp) { if (segmentInfo.audio && segmentInfo.audio.length) { var audioBaseTimestamp = baseTimestamp; if (typeof audioBaseTimestamp === 'undefined') { audioBaseTimestamp = segmentInfo.audio[0].dts; } segmentInfo.audio.forEach(function(info) { info.dts = handleRollover(info.dts, audioBaseTimestamp); info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds info.dtsTime = info.dts / PES_TIMESCALE; info.ptsTime = info.pts / PES_TIMESCALE; }); } if (segmentInfo.video && segmentInfo.video.length) { var videoBaseTimestamp = baseTimestamp; if (typeof videoBaseTimestamp === 'undefined') { videoBaseTimestamp = segmentInfo.video[0].dts; } segmentInfo.video.forEach(function(info) { info.dts = handleRollover(info.dts, videoBaseTimestamp); info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds info.dtsTime = info.dts / PES_TIMESCALE; info.ptsTime = info.pts / PES_TIMESCALE; }); if (segmentInfo.firstKeyFrame) { var frame = segmentInfo.firstKeyFrame; frame.dts = handleRollover(frame.dts, videoBaseTimestamp); frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds frame.dtsTime = frame.dts / PES_TIMESCALE; frame.ptsTime = frame.dts / PES_TIMESCALE; } } }; /** * inspects the aac data stream for start and end time information */ var inspectAac_ = function(bytes) { var endLoop = false, audioCount = 0, sampleRate = null, timestamp = null, frameSize = 0, byteIndex = 0, packet; while (bytes.length - byteIndex >= 3) { var type = probe.aac.parseType(bytes, byteIndex); switch (type) { case 'timed-metadata': // Exit early because we don't have enough to parse // the ID3 tag header if (bytes.length - byteIndex < 10) { endLoop = true; break; } frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer // to emit a full packet if (frameSize > bytes.length) { endLoop = true; break; } if (timestamp === null) { packet = bytes.subarray(byteIndex, byteIndex + frameSize); timestamp = probe.aac.parseAacTimestamp(packet); } byteIndex += frameSize; break; case 'audio': // Exit early because we don't have enough to parse // the ADTS frame header if (bytes.length - byteIndex < 7) { endLoop = true; break; } frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer // to emit a full packet if (frameSize > bytes.length) { endLoop = true; break; } if (sampleRate === null) { packet = bytes.subarray(byteIndex, byteIndex + frameSize); sampleRate = probe.aac.parseSampleRate(packet); } audioCount++; byteIndex += frameSize; break; default: byteIndex++; break; } if (endLoop) { return null; } } if (sampleRate === null || timestamp === null) { return null; } var audioTimescale = PES_TIMESCALE / sampleRate; var result = { audio: [ { type: 'audio', dts: timestamp, pts: timestamp }, { type: 'audio', dts: timestamp + (audioCount * 1024 * audioTimescale), pts: timestamp + (audioCount * 1024 * audioTimescale) } ] }; return result; }; /** * inspects the transport stream segment data for start and end time information * of the audio and video tracks (when present) as well as the first key frame's * start time. */ var inspectTs_ = function(bytes) { var pmt = { pid: null, table: null }; var result = {}; parsePsi_(bytes, pmt); for (var pid in pmt.table) { if (pmt.table.hasOwnProperty(pid)) { var type = pmt.table[pid]; switch (type) { case StreamTypes.H264_STREAM_TYPE: result.video = []; parseVideoPes_(bytes, pmt, result); if (result.video.length === 0) { delete result.video; } break; case StreamTypes.ADTS_STREAM_TYPE: result.audio = []; parseAudioPes_(bytes, pmt, result); if (result.audio.length === 0) { delete result.audio; } break; default: break; } } } return result; }; /** * Inspects segment byte data and returns an object with start and end timing information * * @param {Uint8Array} bytes The segment byte data * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame * timestamps for rollover. This value must be in 90khz clock. * @return {Object} Object containing start and end frame timing info of segment. */ var inspect = function(bytes, baseTimestamp) { var isAacData = isLikelyAacData(bytes); var result; if (isAacData) { result = inspectAac_(bytes); } else { result = inspectTs_(bytes); } if (!result || (!result.audio && !result.video)) { return null; } adjustTimestamp_(result, baseTimestamp); return result; }; module.exports = { inspect: inspect }; },{"../aac/probe.js":37,"../m2ts/probe.js":50,"../m2ts/stream-types.js":51,"../m2ts/timestamp-rollover-stream.js":52}],58:[function(require,module,exports){ var ONE_SECOND_IN_TS = 90000, // 90kHz clock secondsToVideoTs, secondsToAudioTs, videoTsToSeconds, audioTsToSeconds, audioTsToVideoTs, videoTsToAudioTs; secondsToVideoTs = function(seconds) { return seconds * ONE_SECOND_IN_TS; }; secondsToAudioTs = function(seconds, sampleRate) { return seconds * sampleRate; }; videoTsToSeconds = function(timestamp) { return timestamp / ONE_SECOND_IN_TS; }; audioTsToSeconds = function(timestamp, sampleRate) { return timestamp / sampleRate; }; audioTsToVideoTs = function(timestamp, sampleRate) { return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate)); }; videoTsToAudioTs = function(timestamp, sampleRate) { return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate); }; module.exports = { secondsToVideoTs: secondsToVideoTs, secondsToAudioTs: secondsToAudioTs, videoTsToSeconds: videoTsToSeconds, audioTsToSeconds: audioTsToSeconds, audioTsToVideoTs: audioTsToVideoTs, videoTsToAudioTs: videoTsToAudioTs }; },{}],59:[function(require,module,exports){ 'use strict'; var ExpGolomb; /** * Parser for exponential Golomb codes, a variable-bitwidth number encoding * scheme used by h264. */ ExpGolomb = function(workingData) { var // the number of bytes left to examine in workingData workingBytesAvailable = workingData.byteLength, // the current word being examined workingWord = 0, // :uint // the number of bits left to examine in the current word workingBitsAvailable = 0; // :uint; // ():uint this.length = function() { return (8 * workingBytesAvailable); }; // ():uint this.bitsAvailable = function() { return (8 * workingBytesAvailable) + workingBitsAvailable; }; // ():void this.loadWord = function() { var position = workingData.byteLength - workingBytesAvailable, workingBytes = new Uint8Array(4), availableBytes = Math.min(4, workingBytesAvailable); if (availableBytes === 0) { throw new Error('no bytes available'); } workingBytes.set(workingData.subarray(position, position + availableBytes)); workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed workingBitsAvailable = availableBytes * 8; workingBytesAvailable -= availableBytes; }; // (count:int):void this.skipBits = function(count) { var skipBytes; // :int if (workingBitsAvailable > count) { workingWord <<= count; workingBitsAvailable -= count; } else { count -= workingBitsAvailable; skipBytes = Math.floor(count / 8); count -= (skipBytes * 8); workingBytesAvailable -= skipBytes; this.loadWord(); workingWord <<= count; workingBitsAvailable -= count; } }; // (size:int):uint this.readBits = function(size) { var bits = Math.min(workingBitsAvailable, size), // :uint valu = workingWord >>> (32 - bits); // :uint // if size > 31, handle error workingBitsAvailable -= bits; if (workingBitsAvailable > 0) { workingWord <<= bits; } else if (workingBytesAvailable > 0) { this.loadWord(); } bits = size - bits; if (bits > 0) { return valu << bits | this.readBits(bits); } return valu; }; // ():uint this.skipLeadingZeros = function() { var leadingZeroCount; // :uint for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) { if ((workingWord & (0x80000000 >>> leadingZeroCount)) !== 0) { // the first bit of working word is 1 workingWord <<= leadingZeroCount; workingBitsAvailable -= leadingZeroCount; return leadingZeroCount; } } // we exhausted workingWord and still have not found a 1 this.loadWord(); return leadingZeroCount + this.skipLeadingZeros(); }; // ():void this.skipUnsignedExpGolomb = function() { this.skipBits(1 + this.skipLeadingZeros()); }; // ():void this.skipExpGolomb = function() { this.skipBits(1 + this.skipLeadingZeros()); }; // ():uint this.readUnsignedExpGolomb = function() { var clz = this.skipLeadingZeros(); // :uint return this.readBits(clz + 1) - 1; }; // ():int this.readExpGolomb = function() { var valu = this.readUnsignedExpGolomb(); // :int if (0x01 & valu) { // the number is odd if the low order bit is set return (1 + valu) >>> 1; // add 1 to make it even, and divide by 2 } return -1 * (valu >>> 1); // divide by two then make it negative }; // Some convenience functions // :Boolean this.readBoolean = function() { return this.readBits(1) === 1; }; // ():int this.readUnsignedByte = function() { return this.readBits(8); }; this.loadWord(); }; module.exports = ExpGolomb; },{}],60:[function(require,module,exports){ /** * mux.js * * Copyright (c) 2014 Brightcove * All rights reserved. * * A lightweight readable stream implemention that handles event dispatching. * Objects that inherit from streams should call init in their constructors. */ 'use strict'; var Stream = function() { this.init = function() { var listeners = {}; /** * Add a listener for a specified event type. * @param type {string} the event name * @param listener {function} the callback to be invoked when an event of * the specified type occurs */ this.on = function(type, listener) { if (!listeners[type]) { listeners[type] = []; } listeners[type] = listeners[type].concat(listener); }; /** * Remove a listener for a specified event type. * @param type {string} the event name * @param listener {function} a function previously registered for this * type of event through `on` */ this.off = function(type, listener) { var index; if (!listeners[type]) { return false; } index = listeners[type].indexOf(listener); listeners[type] = listeners[type].slice(); listeners[type].splice(index, 1); return index > -1; }; /** * Trigger an event of the specified type on this stream. Any additional * arguments to this function are passed as parameters to event listeners. * @param type {string} the event name */ this.trigger = function(type) { var callbacks, i, length, args; callbacks = listeners[type]; if (!callbacks) { return; } // Slicing the arguments on every invocation of this method // can add a significant amount of overhead. Avoid the // intermediate object creation for the common case of a // single callback argument if (arguments.length === 2) { length = callbacks.length; for (i = 0; i < length; ++i) { callbacks[i].call(this, arguments[1]); } } else { args = []; i = arguments.length; for (i = 1; i < arguments.length; ++i) { args.push(arguments[i]); } length = callbacks.length; for (i = 0; i < length; ++i) { callbacks[i].apply(this, args); } } }; /** * Destroys the stream and cleans up. */ this.dispose = function() { listeners = {}; }; }; }; /** * Forwards all `data` events on this stream to the destination stream. The * destination stream should provide a method `push` to receive the data * events as they arrive. * @param destination {stream} the stream that will receive all `data` events * @param autoFlush {boolean} if false, we will not call `flush` on the destination * when the current stream emits a 'done' event * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options */ Stream.prototype.pipe = function(destination) { this.on('data', function(data) { destination.push(data); }); this.on('done', function(flushSource) { destination.flush(flushSource); }); return destination; }; // Default stream functions that are expected to be overridden to perform // actual work. These are provided by the prototype as a sort of no-op // implementation so that we don't have to check for their existence in the // `pipe` function above. Stream.prototype.push = function(data) { this.trigger('data', data); }; Stream.prototype.flush = function(flushSource) { this.trigger('done', flushSource); }; module.exports = Stream; },{}],61:[function(require,module,exports){ /* jshint ignore:start */ (function(root) { /* jshint ignore:end */ var URLToolkit = { // build an absolute URL from a relative one using the provided baseURL // if relativeURL is an absolute URL it will be returned as is. buildAbsoluteURL: function(baseURL, relativeURL) { // remove any remaining space and CRLF relativeURL = relativeURL.trim(); if (/^[a-z]+:/i.test(relativeURL)) { // complete url, not relative return relativeURL; } var relativeURLQuery = null; var relativeURLHash = null; var relativeURLHashSplit = /^([^#]*)(.*)$/.exec(relativeURL); if (relativeURLHashSplit) { relativeURLHash = relativeURLHashSplit[2]; relativeURL = relativeURLHashSplit[1]; } var relativeURLQuerySplit = /^([^\?]*)(.*)$/.exec(relativeURL); if (relativeURLQuerySplit) { relativeURLQuery = relativeURLQuerySplit[2]; relativeURL = relativeURLQuerySplit[1]; } var baseURLHashSplit = /^([^#]*)(.*)$/.exec(baseURL); if (baseURLHashSplit) { baseURL = baseURLHashSplit[1]; } var baseURLQuerySplit = /^([^\?]*)(.*)$/.exec(baseURL); if (baseURLQuerySplit) { baseURL = baseURLQuerySplit[1]; } var baseURLDomainSplit = /^(([a-z]+:)?\/\/[^:\/]+(:[0-9]+)?)?(\/?.*)$/i.exec(baseURL); if (!baseURLDomainSplit) { throw new Error('Error trying to parse base URL.'); } // e.g. 'http:', 'https:', '' var baseURLProtocol = baseURLDomainSplit[2] || ''; // e.g. 'http://example.com', '//example.com', '' var baseURLProtocolDomain = baseURLDomainSplit[1] || ''; // e.g. '/a/b/c/playlist.m3u8', 'a/b/c/playlist.m3u8' var baseURLPath = baseURLDomainSplit[4]; if (baseURLPath.indexOf('/') !== 0 && baseURLProtocolDomain !== '') { // this handles a base url of http://example.com (missing last slash) baseURLPath = '/'+baseURLPath; } var builtURL = null; if (/^\/\//.test(relativeURL)) { // relative url starts wth '//' so copy protocol (which may be '' if baseUrl didn't provide one) builtURL = baseURLProtocol+'//'+URLToolkit.buildAbsolutePath('', relativeURL.substring(2)); } else if (/^\//.test(relativeURL)) { // relative url starts with '/' so start from root of domain builtURL = baseURLProtocolDomain+'/'+URLToolkit.buildAbsolutePath('', relativeURL.substring(1)); } else { builtURL = URLToolkit.buildAbsolutePath(baseURLProtocolDomain+baseURLPath, relativeURL); } // put the query and hash parts back if (relativeURLQuery) { builtURL += relativeURLQuery; } if (relativeURLHash) { builtURL += relativeURLHash; } return builtURL; }, // build an absolute path using the provided basePath // adapted from https://developer.mozilla.org/en-US/docs/Web/API/document/cookie#Using_relative_URLs_in_the_path_parameter // this does not handle the case where relativePath is "/" or "//". These cases should be handled outside this. buildAbsolutePath: function(basePath, relativePath) { var sRelPath = relativePath; var nUpLn, sDir = '', sPath = basePath.replace(/[^\/]*$/, sRelPath.replace(/(\/|^)(?:\.?\/+)+/g, '$1')); for (var nEnd, nStart = 0; nEnd = sPath.indexOf('/../', nStart), nEnd > -1; nStart = nEnd + nUpLn) { nUpLn = /^\/(?:\.\.\/)*/.exec(sPath.slice(nEnd))[0].length; sDir = (sDir + sPath.substring(nStart, nEnd)).replace(new RegExp('(?:\\\/+[^\\\/]*){0,' + ((nUpLn - 1) / 3) + '}$'), '/'); } return sDir + sPath.substr(nStart); } }; /* jshint ignore:start */ if(typeof exports === 'object' && typeof module === 'object') module.exports = URLToolkit; else if(typeof define === 'function' && define.amd) define([], function() { return URLToolkit; }); else if(typeof exports === 'object') exports["URLToolkit"] = URLToolkit; else root["URLToolkit"] = URLToolkit; })(this); /* jshint ignore:end */ },{}],62:[function(require,module,exports){ (function (global){ /** * @file add-text-track-data.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); /** * Define properties on a cue for backwards compatability, * but warn the user that the way that they are using it * is depricated and will be removed at a later date. * * @param {Cue} cue the cue to add the properties on * @private */ var deprecateOldCue = function deprecateOldCue(cue) { Object.defineProperties(cue.frame, { id: { get: function get() { _videoJs2['default'].log.warn('cue.frame.id is deprecated. Use cue.value.key instead.'); return cue.value.key; } }, value: { get: function get() { _videoJs2['default'].log.warn('cue.frame.value is deprecated. Use cue.value.data instead.'); return cue.value.data; } }, privateData: { get: function get() { _videoJs2['default'].log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.'); return cue.value.data; } } }); }; var durationOfVideo = function durationOfVideo(duration) { var dur = undefined; if (isNaN(duration) || Math.abs(duration) === Infinity) { dur = Number.MAX_VALUE; } else { dur = duration; } return dur; }; /** * Add text track data to a source handler given the captions and * metadata from the buffer. * * @param {Object} sourceHandler the flash or virtual source buffer * @param {Array} captionArray an array of caption data * @param {Array} cue an array of meta data * @private */ var addTextTrackData = function addTextTrackData(sourceHandler, captionArray, metadataArray) { var Cue = _globalWindow2['default'].WebKitDataCue || _globalWindow2['default'].VTTCue; if (captionArray) { captionArray.forEach(function (caption) { this.inbandTextTrack_.addCue(new Cue(caption.startTime + this.timestampOffset, caption.endTime + this.timestampOffset, caption.text)); }, sourceHandler); } if (metadataArray) { (function () { var videoDuration = durationOfVideo(sourceHandler.mediaSource_.duration); metadataArray.forEach(function (metadata) { var time = metadata.cueTime + this.timestampOffset; metadata.frames.forEach(function (frame) { var cue = new Cue(time, time, frame.value || frame.url || frame.data || ''); cue.frame = frame; cue.value = frame; deprecateOldCue(cue); this.metadataTrack_.addCue(cue); }, this); }, sourceHandler); // Updating the metadeta cues so that // the endTime of each cue is the startTime of the next cue // the endTime of last cue is the duration of the video if (sourceHandler.metadataTrack_ && sourceHandler.metadataTrack_.cues && sourceHandler.metadataTrack_.cues.length) { (function () { var cues = sourceHandler.metadataTrack_.cues; var cuesArray = []; // Create a copy of the TextTrackCueList... // ...disregarding cues with a falsey value for (var i = 0; i < cues.length; i++) { if (cues[i]) { cuesArray.push(cues[i]); } } // Group cues by their startTime value var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) { var timeSlot = obj[cue.startTime] || []; timeSlot.push(cue); obj[cue.startTime] = timeSlot; return obj; }, {}); // Sort startTimes by ascending order var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) { return Number(a) - Number(b); }); // Map each cue group's endTime to the next group's startTime sortedStartTimes.forEach(function (startTime, idx) { var cueGroup = cuesGroupedByStartTime[startTime]; var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime cueGroup.forEach(function (cue) { cue.endTime = nextTime; }); }); })(); } })(); } }; exports['default'] = { addTextTrackData: addTextTrackData, durationOfVideo: durationOfVideo }; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"global/window":30}],63:[function(require,module,exports){ /** * Remove the text track from the player if one with matching kind and * label properties already exists on the player * * @param {Object} player the video.js player object * @param {String} kind to be considered the text track's `kind` must match * @param {String} label to be considered the text track's `label` must match * @private */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var removeExistingTrack = function removeExistingTrack(player, kind, label) { var tracks = player.remoteTextTracks() || []; for (var i = 0; i < tracks.length; i++) { var track = tracks[i]; if (track.kind === kind && track.label === label) { player.removeRemoteTextTrack(track); } } }; exports.removeExistingTrack = removeExistingTrack; /** * Cleaup text tracks on video.js if they exist * * @param {Object} player the video.js player object * @private */ var cleanupTextTracks = function cleanupTextTracks(player) { removeExistingTrack(player, 'captions', 'cc1'); removeExistingTrack(player, 'metadata', 'Timed Metadata'); }; exports.cleanupTextTracks = cleanupTextTracks; },{}],64:[function(require,module,exports){ /** * @file codec-utils.js */ /** * Check if a codec string refers to an audio codec. * * @param {String} codec codec string to check * @return {Boolean} if this is an audio codec * @private */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var isAudioCodec = function isAudioCodec(codec) { return (/mp4a\.\d+.\d+/i.test(codec) ); }; /** * Check if a codec string refers to a video codec. * * @param {String} codec codec string to check * @return {Boolean} if this is a video codec * @private */ var isVideoCodec = function isVideoCodec(codec) { return (/avc1\.[\da-f]+/i.test(codec) ); }; /** * Parse a content type header into a type and parameters * object * * @param {String} type the content type header * @return {Object} the parsed content-type * @private */ var parseContentType = function parseContentType(type) { var object = { type: '', parameters: {} }; var parameters = type.trim().split(';'); // first parameter should always be content-type object.type = parameters.shift().trim(); parameters.forEach(function (parameter) { var pair = parameter.trim().split('='); if (pair.length > 1) { var _name = pair[0].replace(/"/g, '').trim(); var value = pair[1].replace(/"/g, '').trim(); object.parameters[_name] = value; } }); return object; }; /** * Replace the old apple-style `avc1.
.
` codec string with the standard * `avc1.` * * @param {Array} codecs an array of codec strings to fix * @return {Array} the translated codec array * @private */ var translateLegacyCodecs = function translateLegacyCodecs(codecs) { return codecs.map(function (codec) { return codec.replace(/avc1\.(\d+)\.(\d+)/i, function (orig, profile, avcLevel) { var profileHex = ('00' + Number(profile).toString(16)).slice(-2); var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2); return 'avc1.' + profileHex + '00' + avcLevelHex; }); }); }; exports['default'] = { isAudioCodec: isAudioCodec, parseContentType: parseContentType, isVideoCodec: isVideoCodec, translateLegacyCodecs: translateLegacyCodecs }; module.exports = exports['default']; },{}],65:[function(require,module,exports){ /** * @file create-text-tracks-if-necessary.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _cleanupTextTracks = require('./cleanup-text-tracks'); /** * Create text tracks on video.js if they exist on a segment. * * @param {Object} sourceBuffer the VSB or FSB * @param {Object} mediaSource the HTML or Flash media source * @param {Object} segment the segment that may contain the text track * @private */ var createTextTracksIfNecessary = function createTextTracksIfNecessary(sourceBuffer, mediaSource, segment) { var player = mediaSource.player_; // create an in-band caption track if one is present in the segment if (segment.captions && segment.captions.length && !sourceBuffer.inbandTextTrack_) { (0, _cleanupTextTracks.removeExistingTrack)(player, 'captions', 'cc1'); sourceBuffer.inbandTextTrack_ = player.addRemoteTextTrack({ kind: 'captions', label: 'cc1' }, false).track; } if (segment.metadata && segment.metadata.length && !sourceBuffer.metadataTrack_) { (0, _cleanupTextTracks.removeExistingTrack)(player, 'metadata', 'Timed Metadata', true); sourceBuffer.metadataTrack_ = player.addRemoteTextTrack({ kind: 'metadata', label: 'Timed Metadata' }, false).track; sourceBuffer.metadataTrack_.inBandMetadataTrackDispatchType = segment.metadata.dispatchType; } }; exports['default'] = createTextTracksIfNecessary; module.exports = exports['default']; },{"./cleanup-text-tracks":63}],66:[function(require,module,exports){ /** * @file flash-constants.js */ /** * The maximum size in bytes for append operations to the video.js * SWF. Calling through to Flash blocks and can be expensive so * we chunk data and pass through 4KB at a time, yielding to the * browser between chunks. This gives a theoretical maximum rate of * 1MB/s into Flash. Any higher and we begin to drop frames and UI * responsiveness suffers. * * @private */ "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); var flashConstants = { // times in milliseconds TIME_BETWEEN_CHUNKS: 1, BYTES_PER_CHUNK: 1024 * 32 }; exports["default"] = flashConstants; module.exports = exports["default"]; },{}],67:[function(require,module,exports){ (function (global){ /** * @file flash-media-source.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _globalDocument = require('global/document'); var _globalDocument2 = _interopRequireDefault(_globalDocument); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _flashSourceBuffer = require('./flash-source-buffer'); var _flashSourceBuffer2 = _interopRequireDefault(_flashSourceBuffer); var _flashConstants = require('./flash-constants'); var _flashConstants2 = _interopRequireDefault(_flashConstants); var _codecUtils = require('./codec-utils'); var _cleanupTextTracks = require('./cleanup-text-tracks'); /** * A flash implmentation of HTML MediaSources and a polyfill * for browsers that don't support native or HTML MediaSources.. * * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource * @class FlashMediaSource * @extends videojs.EventTarget */ var FlashMediaSource = (function (_videojs$EventTarget) { _inherits(FlashMediaSource, _videojs$EventTarget); function FlashMediaSource() { var _this = this; _classCallCheck(this, FlashMediaSource); _get(Object.getPrototypeOf(FlashMediaSource.prototype), 'constructor', this).call(this); this.sourceBuffers = []; this.readyState = 'closed'; this.on(['sourceopen', 'webkitsourceopen'], function (event) { // find the swf where we will push media data _this.swfObj = _globalDocument2['default'].getElementById(event.swfId); _this.player_ = (0, _videoJs2['default'])(_this.swfObj.parentNode); _this.tech_ = _this.swfObj.tech; _this.readyState = 'open'; _this.tech_.on('seeking', function () { var i = _this.sourceBuffers.length; while (i--) { _this.sourceBuffers[i].abort(); } }); if (_this.tech_.hls) { _this.tech_.hls.on('dispose', function () { (0, _cleanupTextTracks.cleanupTextTracks)(_this.player_); }); } // trigger load events if (_this.swfObj) { _this.swfObj.vjs_load(); } }); } /** * Set or return the presentation duration. * * @param {Double} value the duration of the media in seconds * @param {Double} the current presentation duration * @link http://www.w3.org/TR/media-source/#widl-MediaSource-duration */ /** * We have this function so that the html and flash interfaces * are the same. * * @private */ _createClass(FlashMediaSource, [{ key: 'addSeekableRange_', value: function addSeekableRange_() {} // intentional no-op /** * Create a new flash source buffer and add it to our flash media source. * * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/addSourceBuffer * @param {String} type the content-type of the source * @return {Object} the flash source buffer */ }, { key: 'addSourceBuffer', value: function addSourceBuffer(type) { var parsedType = (0, _codecUtils.parseContentType)(type); var sourceBuffer = undefined; // if this is an FLV type, we'll push data to flash if (parsedType.type === 'video/mp2t') { // Flash source buffers sourceBuffer = new _flashSourceBuffer2['default'](this); } else { throw new Error('NotSupportedError (Video.js)'); } this.sourceBuffers.push(sourceBuffer); return sourceBuffer; } /** * Signals the end of the stream. * * @link https://w3c.github.io/media-source/#widl-MediaSource-endOfStream-void-EndOfStreamError-error * @param {String=} error Signals that a playback error * has occurred. If specified, it must be either "network" or * "decode". */ }, { key: 'endOfStream', value: function endOfStream(error) { if (error === 'network') { // MEDIA_ERR_NETWORK this.tech_.error(2); } else if (error === 'decode') { // MEDIA_ERR_DECODE this.tech_.error(3); } if (this.readyState !== 'ended') { this.readyState = 'ended'; this.swfObj.vjs_endOfStream(); } } }]); return FlashMediaSource; })(_videoJs2['default'].EventTarget); exports['default'] = FlashMediaSource; try { Object.defineProperty(FlashMediaSource.prototype, 'duration', { /** * Return the presentation duration. * * @return {Double} the duration of the media in seconds * @link http://www.w3.org/TR/media-source/#widl-MediaSource-duration */ get: function get() { if (!this.swfObj) { return NaN; } // get the current duration from the SWF return this.swfObj.vjs_getProperty('duration'); }, /** * Set the presentation duration. * * @param {Double} value the duration of the media in seconds * @return {Double} the duration of the media in seconds * @link http://www.w3.org/TR/media-source/#widl-MediaSource-duration */ set: function set(value) { var i = undefined; var oldDuration = this.swfObj.vjs_getProperty('duration'); this.swfObj.vjs_setProperty('duration', value); if (value < oldDuration) { // In MSE, this triggers the range removal algorithm which causes // an update to occur for (i = 0; i < this.sourceBuffers.length; i++) { this.sourceBuffers[i].remove(value, oldDuration); } } return value; } }); } catch (e) { // IE8 throws if defineProperty is called on a non-DOM node. We // don't support IE8 but we shouldn't throw an error if loaded // there. FlashMediaSource.prototype.duration = NaN; } for (var property in _flashConstants2['default']) { FlashMediaSource[property] = _flashConstants2['default'][property]; } module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./cleanup-text-tracks":63,"./codec-utils":64,"./flash-constants":66,"./flash-source-buffer":68,"global/document":29}],68:[function(require,module,exports){ (function (global){ /** * @file flash-source-buffer.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _muxJsLibFlv = require('mux.js/lib/flv'); var _muxJsLibFlv2 = _interopRequireDefault(_muxJsLibFlv); var _removeCuesFromTrack = require('./remove-cues-from-track'); var _removeCuesFromTrack2 = _interopRequireDefault(_removeCuesFromTrack); var _createTextTracksIfNecessary = require('./create-text-tracks-if-necessary'); var _createTextTracksIfNecessary2 = _interopRequireDefault(_createTextTracksIfNecessary); var _addTextTrackData = require('./add-text-track-data'); var _flashTransmuxerWorker = require('./flash-transmuxer-worker'); var _flashTransmuxerWorker2 = _interopRequireDefault(_flashTransmuxerWorker); var _webworkify = require('webworkify'); var _webworkify2 = _interopRequireDefault(_webworkify); var _flashConstants = require('./flash-constants'); var _flashConstants2 = _interopRequireDefault(_flashConstants); /** * A wrapper around the setTimeout function that uses * the flash constant time between ticks value. * * @param {Function} func the function callback to run * @private */ var scheduleTick = function scheduleTick(func) { // Chrome doesn't invoke requestAnimationFrame callbacks // in background tabs, so use setTimeout. _globalWindow2['default'].setTimeout(func, _flashConstants2['default'].TIME_BETWEEN_CHUNKS); }; /** * Generates a random string of max length 6 * * @return {String} the randomly generated string * @function generateRandomString * @private */ var generateRandomString = function generateRandomString() { return Math.random().toString(36).slice(2, 8); }; /** * Round a number to a specified number of places much like * toFixed but return a number instead of a string representation. * * @param {Number} num A number * @param {Number} places The number of decimal places which to * round * @private */ var toDecimalPlaces = function toDecimalPlaces(num, places) { if (typeof places !== 'number' || places < 0) { places = 0; } var scale = Math.pow(10, places); return Math.round(num * scale) / scale; }; /** * A SourceBuffer implementation for Flash rather than HTML. * * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource * @param {Object} mediaSource the flash media source * @class FlashSourceBuffer * @extends videojs.EventTarget */ var FlashSourceBuffer = (function (_videojs$EventTarget) { _inherits(FlashSourceBuffer, _videojs$EventTarget); function FlashSourceBuffer(mediaSource) { var _this = this; _classCallCheck(this, FlashSourceBuffer); _get(Object.getPrototypeOf(FlashSourceBuffer.prototype), 'constructor', this).call(this); var encodedHeader = undefined; // Start off using the globally defined value but refine // as we append data into flash this.chunkSize_ = _flashConstants2['default'].BYTES_PER_CHUNK; // byte arrays queued to be appended this.buffer_ = []; // the total number of queued bytes this.bufferSize_ = 0; // to be able to determine the correct position to seek to, we // need to retain information about the mapping between the // media timeline and PTS values this.basePtsOffset_ = NaN; this.mediaSource_ = mediaSource; this.audioBufferEnd_ = NaN; this.videoBufferEnd_ = NaN; // indicates whether the asynchronous continuation of an operation // is still being processed // see https://w3c.github.io/media-source/#widl-SourceBuffer-updating this.updating = false; this.timestampOffset_ = 0; encodedHeader = _globalWindow2['default'].btoa(String.fromCharCode.apply(null, Array.prototype.slice.call(_muxJsLibFlv2['default'].getFlvHeader()))); // create function names with added randomness for the global callbacks flash will use // to get data from javascript into the swf. Random strings are added as a safety // measure for pages with multiple players since these functions will be global // instead of per instance. When making a call to the swf, the browser generates a // try catch code snippet, but just takes the function name and writes out an unquoted // call to that function. If the player id has any special characters, this will result // in an error, so safePlayerId replaces all special characters to '_' var safePlayerId = this.mediaSource_.player_.id().replace(/[^a-zA-Z0-9]/g, '_'); this.flashEncodedHeaderName_ = 'vjs_flashEncodedHeader_' + safePlayerId + generateRandomString(); this.flashEncodedDataName_ = 'vjs_flashEncodedData_' + safePlayerId + generateRandomString(); _globalWindow2['default'][this.flashEncodedHeaderName_] = function () { delete _globalWindow2['default'][_this.flashEncodedHeaderName_]; return encodedHeader; }; this.mediaSource_.swfObj.vjs_appendChunkReady(this.flashEncodedHeaderName_); this.transmuxer_ = (0, _webworkify2['default'])(_flashTransmuxerWorker2['default']); this.transmuxer_.postMessage({ action: 'init', options: {} }); this.transmuxer_.onmessage = function (event) { if (event.data.action === 'data') { _this.receiveBuffer_(event.data.segment); } }; this.one('updateend', function () { _this.mediaSource_.tech_.trigger('loadedmetadata'); }); Object.defineProperty(this, 'timestampOffset', { get: function get() { return this.timestampOffset_; }, set: function set(val) { if (typeof val === 'number' && val >= 0) { this.timestampOffset_ = val; // We have to tell flash to expect a discontinuity this.mediaSource_.swfObj.vjs_discontinuity(); // the media <-> PTS mapping must be re-established after // the discontinuity this.basePtsOffset_ = NaN; this.audioBufferEnd_ = NaN; this.videoBufferEnd_ = NaN; this.transmuxer_.postMessage({ action: 'reset' }); } } }); Object.defineProperty(this, 'buffered', { get: function get() { if (!this.mediaSource_ || !this.mediaSource_.swfObj || !('vjs_getProperty' in this.mediaSource_.swfObj)) { return _videoJs2['default'].createTimeRange(); } var buffered = this.mediaSource_.swfObj.vjs_getProperty('buffered'); if (buffered && buffered.length) { buffered[0][0] = toDecimalPlaces(buffered[0][0], 3); buffered[0][1] = toDecimalPlaces(buffered[0][1], 3); } return _videoJs2['default'].createTimeRanges(buffered); } }); // On a seek we remove all text track data since flash has no concept // of a buffered-range and everything else is reset on seek this.mediaSource_.player_.on('seeked', function () { (0, _removeCuesFromTrack2['default'])(0, Infinity, _this.metadataTrack_); (0, _removeCuesFromTrack2['default'])(0, Infinity, _this.inbandTextTrack_); }); this.mediaSource_.player_.tech_.hls.on('dispose', function () { _this.transmuxer_.terminate(); }); } /** * Append bytes to the sourcebuffers buffer, in this case we * have to append it to swf object. * * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/appendBuffer * @param {Array} bytes */ _createClass(FlashSourceBuffer, [{ key: 'appendBuffer', value: function appendBuffer(bytes) { var error = undefined; if (this.updating) { error = new Error('SourceBuffer.append() cannot be called ' + 'while an update is in progress'); error.name = 'InvalidStateError'; error.code = 11; throw error; } this.updating = true; this.mediaSource_.readyState = 'open'; this.trigger({ type: 'update' }); this.transmuxer_.postMessage({ action: 'push', data: bytes.buffer, byteOffset: bytes.byteOffset, byteLength: bytes.byteLength }, [bytes.buffer]); this.transmuxer_.postMessage({ action: 'flush' }); } /** * Reset the parser and remove any data queued to be sent to the SWF. * * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/abort */ }, { key: 'abort', value: function abort() { this.buffer_ = []; this.bufferSize_ = 0; this.mediaSource_.swfObj.vjs_abort(); // report any outstanding updates have ended if (this.updating) { this.updating = false; this.trigger({ type: 'updateend' }); } } /** * Flash cannot remove ranges already buffered in the NetStream * but seeking clears the buffer entirely. For most purposes, * having this operation act as a no-op is acceptable. * * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/remove * @param {Double} start start of the section to remove * @param {Double} end end of the section to remove */ }, { key: 'remove', value: function remove(start, end) { (0, _removeCuesFromTrack2['default'])(start, end, this.metadataTrack_); (0, _removeCuesFromTrack2['default'])(start, end, this.inbandTextTrack_); this.trigger({ type: 'update' }); this.trigger({ type: 'updateend' }); } /** * Receive a buffer from the flv. * * @param {Object} segment * @private */ }, { key: 'receiveBuffer_', value: function receiveBuffer_(segment) { var _this2 = this; // create an in-band caption track if one is present in the segment (0, _createTextTracksIfNecessary2['default'])(this, this.mediaSource_, segment); (0, _addTextTrackData.addTextTrackData)(this, segment.captions, segment.metadata); // Do this asynchronously since convertTagsToData_ can be time consuming scheduleTick(function () { var flvBytes = _this2.convertTagsToData_(segment); if (_this2.buffer_.length === 0) { scheduleTick(_this2.processBuffer_.bind(_this2)); } if (flvBytes) { _this2.buffer_.push(flvBytes); _this2.bufferSize_ += flvBytes.byteLength; } }); } /** * Append a portion of the current buffer to the SWF. * * @private */ }, { key: 'processBuffer_', value: function processBuffer_() { var _this3 = this; var chunkSize = _flashConstants2['default'].BYTES_PER_CHUNK; if (!this.buffer_.length) { if (this.updating !== false) { this.updating = false; this.trigger({ type: 'updateend' }); } // do nothing if the buffer is empty return; } // concatenate appends up to the max append size var chunk = this.buffer_[0].subarray(0, chunkSize); // requeue any bytes that won't make it this round if (chunk.byteLength < chunkSize || this.buffer_[0].byteLength === chunkSize) { this.buffer_.shift(); } else { this.buffer_[0] = this.buffer_[0].subarray(chunkSize); } this.bufferSize_ -= chunk.byteLength; // base64 encode the bytes var binary = []; var length = chunk.byteLength; for (var i = 0; i < length; i++) { binary.push(String.fromCharCode(chunk[i])); } var b64str = _globalWindow2['default'].btoa(binary.join('')); _globalWindow2['default'][this.flashEncodedDataName_] = function () { // schedule another processBuffer to process any left over data or to // trigger updateend scheduleTick(_this3.processBuffer_.bind(_this3)); delete _globalWindow2['default'][_this3.flashEncodedDataName_]; return b64str; }; // Notify the swf that segment data is ready to be appended this.mediaSource_.swfObj.vjs_appendChunkReady(this.flashEncodedDataName_); } /** * Turns an array of flv tags into a Uint8Array representing the * flv data. Also removes any tags that are before the current * time so that playback begins at or slightly after the right * place on a seek * * @private * @param {Object} segmentData object of segment data */ }, { key: 'convertTagsToData_', value: function convertTagsToData_(segmentData) { var segmentByteLength = 0; var tech = this.mediaSource_.tech_; var videoTargetPts = 0; var segment = undefined; var videoTags = segmentData.tags.videoTags; var audioTags = segmentData.tags.audioTags; // Establish the media timeline to PTS translation if we don't // have one already if (isNaN(this.basePtsOffset_) && (videoTags.length || audioTags.length)) { // We know there is at least one video or audio tag, but since we may not have both, // we use pts: Infinity for the missing tag. The will force the following Math.min // call will to use the proper pts value since it will always be less than Infinity var firstVideoTag = videoTags[0] || { pts: Infinity }; var firstAudioTag = audioTags[0] || { pts: Infinity }; this.basePtsOffset_ = Math.min(firstAudioTag.pts, firstVideoTag.pts); } if (tech.seeking()) { // Do not use previously saved buffer end values while seeking since buffer // is cleared on all seeks this.videoBufferEnd_ = NaN; this.audioBufferEnd_ = NaN; } if (isNaN(this.videoBufferEnd_)) { if (tech.buffered().length) { videoTargetPts = tech.buffered().end(0) - this.timestampOffset; } // Trim to currentTime if seeking if (tech.seeking()) { videoTargetPts = Math.max(videoTargetPts, tech.currentTime() - this.timestampOffset); } // PTS values are represented in milliseconds videoTargetPts *= 1e3; videoTargetPts += this.basePtsOffset_; } else { // Add a fudge factor of 0.1 to the last video pts appended since a rendition change // could append an overlapping segment, in which case there is a high likelyhood // a tag could have a matching pts to videoBufferEnd_, which would cause // that tag to get appended by the tag.pts >= targetPts check below even though it // is a duplicate of what was previously appended videoTargetPts = this.videoBufferEnd_ + 0.1; } // filter complete GOPs with a presentation time less than the seek target/end of buffer var currentIndex = videoTags.length; // if the last tag is beyond videoTargetPts, then do not search the list for a GOP // since our videoTargetPts lies in a future segment if (currentIndex && videoTags[currentIndex - 1].pts >= videoTargetPts) { // Start by walking backwards from the end of the list until we reach a tag that // is equal to or less than videoTargetPts while (--currentIndex) { var currentTag = videoTags[currentIndex]; if (currentTag.pts > videoTargetPts) { continue; } // if we see a keyFrame or metadata tag once we've gone below videoTargetPts, // exit the loop as this is the start of the GOP that we want to append if (currentTag.keyFrame || currentTag.metaDataTag) { break; } } // We need to check if there are any metadata tags that come before currentIndex // as those will be metadata tags associated with the GOP we are appending // There could be 0 to 2 metadata tags that come before the currentIndex depending // on what videoTargetPts is and whether the transmuxer prepended metadata tags to this // key frame while (currentIndex) { var nextTag = videoTags[currentIndex - 1]; if (!nextTag.metaDataTag) { break; } currentIndex--; } } var filteredVideoTags = videoTags.slice(currentIndex); var audioTargetPts = undefined; if (isNaN(this.audioBufferEnd_)) { audioTargetPts = videoTargetPts; } else { // Add a fudge factor of 0.1 to the last video pts appended since a rendition change // could append an overlapping segment, in which case there is a high likelyhood // a tag could have a matching pts to videoBufferEnd_, which would cause // that tag to get appended by the tag.pts >= targetPts check below even though it // is a duplicate of what was previously appended audioTargetPts = this.audioBufferEnd_ + 0.1; } if (filteredVideoTags.length) { // If targetPts intersects a GOP and we appended the tags for the GOP that came // before targetPts, we want to make sure to trim audio tags at the pts // of the first video tag to avoid brief moments of silence audioTargetPts = Math.min(audioTargetPts, filteredVideoTags[0].pts); } // skip tags with a presentation time less than the seek target/end of buffer currentIndex = 0; while (currentIndex < audioTags.length) { if (audioTags[currentIndex].pts >= audioTargetPts) { break; } currentIndex++; } var filteredAudioTags = audioTags.slice(currentIndex); // update the audio and video buffer ends if (filteredAudioTags.length) { this.audioBufferEnd_ = filteredAudioTags[filteredAudioTags.length - 1].pts; } if (filteredVideoTags.length) { this.videoBufferEnd_ = filteredVideoTags[filteredVideoTags.length - 1].pts; } var tags = this.getOrderedTags_(filteredVideoTags, filteredAudioTags); if (tags.length === 0) { return; } // If we are appending data that comes before our target pts, we want to tell // the swf to adjust its notion of current time to account for the extra tags // we are appending to complete the GOP that intersects with targetPts if (tags[0].pts < videoTargetPts && tech.seeking()) { var fudgeFactor = 1 / 30; var currentTime = tech.currentTime(); var diff = (videoTargetPts - tags[0].pts) / 1e3; var adjustedTime = currentTime - diff; if (adjustedTime < fudgeFactor) { adjustedTime = 0; } try { this.mediaSource_.swfObj.vjs_adjustCurrentTime(adjustedTime); } catch (e) { // no-op for backwards compatability of swf. If adjustCurrentTime fails, // the swf may incorrectly report currentTime and buffered ranges // but should not affect playback over than the time displayed on the // progress bar is inaccurate } } // concatenate the bytes into a single segment for (var i = 0; i < tags.length; i++) { segmentByteLength += tags[i].bytes.byteLength; } segment = new Uint8Array(segmentByteLength); for (var i = 0, j = 0; i < tags.length; i++) { segment.set(tags[i].bytes, j); j += tags[i].bytes.byteLength; } return segment; } /** * Assemble the FLV tags in decoder order. * * @private * @param {Array} videoTags list of video tags * @param {Array} audioTags list of audio tags */ }, { key: 'getOrderedTags_', value: function getOrderedTags_(videoTags, audioTags) { var tag = undefined; var tags = []; while (videoTags.length || audioTags.length) { if (!videoTags.length) { // only audio tags remain tag = audioTags.shift(); } else if (!audioTags.length) { // only video tags remain tag = videoTags.shift(); } else if (audioTags[0].dts < videoTags[0].dts) { // audio should be decoded next tag = audioTags.shift(); } else { // video should be decoded next tag = videoTags.shift(); } tags.push(tag); } return tags; } }]); return FlashSourceBuffer; })(_videoJs2['default'].EventTarget); exports['default'] = FlashSourceBuffer; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./add-text-track-data":62,"./create-text-tracks-if-necessary":65,"./flash-constants":66,"./flash-transmuxer-worker":69,"./remove-cues-from-track":71,"global/window":30,"mux.js/lib/flv":44,"webworkify":75}],69:[function(require,module,exports){ /** * @file flash-transmuxer-worker.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _muxJsLibFlv = require('mux.js/lib/flv'); var _muxJsLibFlv2 = _interopRequireDefault(_muxJsLibFlv); /** * Re-emits transmuxer events by converting them into messages to the * world outside the worker. * * @param {Object} transmuxer the transmuxer to wire events on * @private */ var wireTransmuxerEvents = function wireTransmuxerEvents(transmuxer) { transmuxer.on('data', function (segment) { _globalWindow2['default'].postMessage({ action: 'data', segment: segment }); }); transmuxer.on('done', function (data) { _globalWindow2['default'].postMessage({ action: 'done' }); }); }; /** * All incoming messages route through this hash. If no function exists * to handle an incoming message, then we ignore the message. * * @class MessageHandlers * @param {Object} options the options to initialize with */ var MessageHandlers = (function () { function MessageHandlers(options) { _classCallCheck(this, MessageHandlers); this.options = options || {}; this.init(); } /** * Our web wroker interface so that things can talk to mux.js * that will be running in a web worker. The scope is passed to this by * webworkify. * * @param {Object} self the scope for the web worker */ /** * initialize our web worker and wire all the events. */ _createClass(MessageHandlers, [{ key: 'init', value: function init() { if (this.transmuxer) { this.transmuxer.dispose(); } this.transmuxer = new _muxJsLibFlv2['default'].Transmuxer(this.options); wireTransmuxerEvents(this.transmuxer); } /** * Adds data (a ts segment) to the start of the transmuxer pipeline for * processing. * * @param {ArrayBuffer} data data to push into the muxer */ }, { key: 'push', value: function push(data) { // Cast array buffer to correct type for transmuxer var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength); this.transmuxer.push(segment); } /** * Recreate the transmuxer so that the next segment added via `push` * start with a fresh transmuxer. */ }, { key: 'reset', value: function reset() { this.init(); } /** * Forces the pipeline to finish processing the last segment and emit its * results. */ }, { key: 'flush', value: function flush() { this.transmuxer.flush(); } }]); return MessageHandlers; })(); var FlashTransmuxerWorker = function FlashTransmuxerWorker(self) { self.onmessage = function (event) { if (event.data.action === 'init' && event.data.options) { this.messageHandlers = new MessageHandlers(event.data.options); return; } if (!this.messageHandlers) { this.messageHandlers = new MessageHandlers(); } if (event.data && event.data.action && event.data.action !== 'init') { if (this.messageHandlers[event.data.action]) { this.messageHandlers[event.data.action](event.data); } } }; }; exports['default'] = function (self) { return new FlashTransmuxerWorker(self); }; module.exports = exports['default']; },{"global/window":30,"mux.js/lib/flv":44}],70:[function(require,module,exports){ (function (global){ /** * @file html-media-source.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _globalDocument = require('global/document'); var _globalDocument2 = _interopRequireDefault(_globalDocument); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _virtualSourceBuffer = require('./virtual-source-buffer'); var _virtualSourceBuffer2 = _interopRequireDefault(_virtualSourceBuffer); var _addTextTrackData = require('./add-text-track-data'); var _codecUtils = require('./codec-utils'); var _cleanupTextTracks = require('./cleanup-text-tracks'); /** * Our MediaSource implementation in HTML, mimics native * MediaSource where/if possible. * * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource * @class HtmlMediaSource * @extends videojs.EventTarget */ var HtmlMediaSource = (function (_videojs$EventTarget) { _inherits(HtmlMediaSource, _videojs$EventTarget); function HtmlMediaSource() { var _this = this; _classCallCheck(this, HtmlMediaSource); _get(Object.getPrototypeOf(HtmlMediaSource.prototype), 'constructor', this).call(this); var property = undefined; this.nativeMediaSource_ = new _globalWindow2['default'].MediaSource(); // delegate to the native MediaSource's methods by default for (property in this.nativeMediaSource_) { if (!(property in HtmlMediaSource.prototype) && typeof this.nativeMediaSource_[property] === 'function') { this[property] = this.nativeMediaSource_[property].bind(this.nativeMediaSource_); } } // emulate `duration` and `seekable` until seeking can be // handled uniformly for live streams // see https://github.com/w3c/media-source/issues/5 this.duration_ = NaN; Object.defineProperty(this, 'duration', { get: function get() { if (this.duration_ === Infinity) { return this.duration_; } return this.nativeMediaSource_.duration; }, set: function set(duration) { this.duration_ = duration; if (duration !== Infinity) { this.nativeMediaSource_.duration = duration; return; } } }); Object.defineProperty(this, 'seekable', { get: function get() { if (this.duration_ === Infinity) { return _videoJs2['default'].createTimeRanges([[0, this.nativeMediaSource_.duration]]); } return this.nativeMediaSource_.seekable; } }); Object.defineProperty(this, 'readyState', { get: function get() { return this.nativeMediaSource_.readyState; } }); Object.defineProperty(this, 'activeSourceBuffers', { get: function get() { return this.activeSourceBuffers_; } }); // the list of virtual and native SourceBuffers created by this // MediaSource this.sourceBuffers = []; this.activeSourceBuffers_ = []; /** * update the list of active source buffers based upon various * imformation from HLS and video.js * * @private */ this.updateActiveSourceBuffers_ = function () { // Retain the reference but empty the array _this.activeSourceBuffers_.length = 0; // By default, the audio in the combined virtual source buffer is enabled // and the audio-only source buffer (if it exists) is disabled. var combined = false; var audioOnly = true; // TODO: maybe we can store the sourcebuffers on the track objects? // safari may do something like this for (var i = 0; i < _this.player_.audioTracks().length; i++) { var track = _this.player_.audioTracks()[i]; if (track.enabled && track.kind !== 'main') { // The enabled track is an alternate audio track so disable the audio in // the combined source buffer and enable the audio-only source buffer. combined = true; audioOnly = false; break; } } // Since we currently support a max of two source buffers, add all of the source // buffers (in order). _this.sourceBuffers.forEach(function (sourceBuffer) { /* eslinst-disable */ // TODO once codecs are required, we can switch to using the codecs to determine // what stream is the video stream, rather than relying on videoTracks /* eslinst-enable */ sourceBuffer.appendAudioInitSegment_ = true; if (sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) { // combined sourceBuffer.audioDisabled_ = combined; } else if (sourceBuffer.videoCodec_ && !sourceBuffer.audioCodec_) { // If the "combined" source buffer is video only, then we do not want // disable the audio-only source buffer (this is mostly for demuxed // audio and video hls) sourceBuffer.audioDisabled_ = true; audioOnly = false; } else if (!sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) { // audio only sourceBuffer.audioDisabled_ = audioOnly; if (audioOnly) { return; } } _this.activeSourceBuffers_.push(sourceBuffer); }); }; this.onPlayerMediachange_ = function () { _this.sourceBuffers.forEach(function (sourceBuffer) { sourceBuffer.appendAudioInitSegment_ = true; }); }; // Re-emit MediaSource events on the polyfill ['sourceopen', 'sourceclose', 'sourceended'].forEach(function (eventName) { this.nativeMediaSource_.addEventListener(eventName, this.trigger.bind(this)); }, this); // capture the associated player when the MediaSource is // successfully attached this.on('sourceopen', function (event) { // Get the player this MediaSource is attached to var video = _globalDocument2['default'].querySelector('[src="' + _this.url_ + '"]'); if (!video) { return; } _this.player_ = (0, _videoJs2['default'])(video.parentNode); if (_this.player_.audioTracks && _this.player_.audioTracks()) { _this.player_.audioTracks().on('change', _this.updateActiveSourceBuffers_); _this.player_.audioTracks().on('addtrack', _this.updateActiveSourceBuffers_); _this.player_.audioTracks().on('removetrack', _this.updateActiveSourceBuffers_); } _this.player_.on('mediachange', _this.onPlayerMediachange_); }); this.on('sourceended', function (event) { var duration = (0, _addTextTrackData.durationOfVideo)(_this.duration); for (var i = 0; i < _this.sourceBuffers.length; i++) { var sourcebuffer = _this.sourceBuffers[i]; var cues = sourcebuffer.metadataTrack_ && sourcebuffer.metadataTrack_.cues; if (cues && cues.length) { cues[cues.length - 1].endTime = duration; } } }); // explicitly terminate any WebWorkers that were created // by SourceHandlers this.on('sourceclose', function (event) { this.sourceBuffers.forEach(function (sourceBuffer) { if (sourceBuffer.transmuxer_) { sourceBuffer.transmuxer_.terminate(); } }); this.sourceBuffers.length = 0; if (!this.player_) { return; } (0, _cleanupTextTracks.cleanupTextTracks)(this.player_); if (this.player_.audioTracks && this.player_.audioTracks()) { this.player_.audioTracks().off('change', this.updateActiveSourceBuffers_); this.player_.audioTracks().off('addtrack', this.updateActiveSourceBuffers_); this.player_.audioTracks().off('removetrack', this.updateActiveSourceBuffers_); } // We can only change this if the player hasn't been disposed of yet // because `off` eventually tries to use the el_ property. If it has // been disposed of, then don't worry about it because there are no // event handlers left to unbind anyway if (this.player_.el_) { this.player_.off('mediachange', this.onPlayerMediachange_); } }); } /** * Add a range that that can now be seeked to. * * @param {Double} start where to start the addition * @param {Double} end where to end the addition * @private */ _createClass(HtmlMediaSource, [{ key: 'addSeekableRange_', value: function addSeekableRange_(start, end) { var error = undefined; if (this.duration !== Infinity) { error = new Error('MediaSource.addSeekableRange() can only be invoked ' + 'when the duration is Infinity'); error.name = 'InvalidStateError'; error.code = 11; throw error; } if (end > this.nativeMediaSource_.duration || isNaN(this.nativeMediaSource_.duration)) { this.nativeMediaSource_.duration = end; } } /** * Add a source buffer to the media source. * * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/addSourceBuffer * @param {String} type the content-type of the content * @return {Object} the created source buffer */ }, { key: 'addSourceBuffer', value: function addSourceBuffer(type) { var buffer = undefined; var parsedType = (0, _codecUtils.parseContentType)(type); // Create a VirtualSourceBuffer to transmux MPEG-2 transport // stream segments into fragmented MP4s if (/^(video|audio)\/mp2t$/i.test(parsedType.type)) { var codecs = []; if (parsedType.parameters && parsedType.parameters.codecs) { codecs = parsedType.parameters.codecs.split(','); codecs = (0, _codecUtils.translateLegacyCodecs)(codecs); codecs = codecs.filter(function (codec) { return (0, _codecUtils.isAudioCodec)(codec) || (0, _codecUtils.isVideoCodec)(codec); }); } if (codecs.length === 0) { codecs = ['avc1.4d400d', 'mp4a.40.2']; } buffer = new _virtualSourceBuffer2['default'](this, codecs); if (this.sourceBuffers.length !== 0) { // If another VirtualSourceBuffer already exists, then we are creating a // SourceBuffer for an alternate audio track and therefore we know that // the source has both an audio and video track. // That means we should trigger the manual creation of the real // SourceBuffers instead of waiting for the transmuxer to return data this.sourceBuffers[0].createRealSourceBuffers_(); buffer.createRealSourceBuffers_(); // Automatically disable the audio on the first source buffer if // a second source buffer is ever created this.sourceBuffers[0].audioDisabled_ = true; } } else { // delegate to the native implementation buffer = this.nativeMediaSource_.addSourceBuffer(type); } this.sourceBuffers.push(buffer); return buffer; } }]); return HtmlMediaSource; })(_videoJs2['default'].EventTarget); exports['default'] = HtmlMediaSource; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./add-text-track-data":62,"./cleanup-text-tracks":63,"./codec-utils":64,"./virtual-source-buffer":74,"global/document":29,"global/window":30}],71:[function(require,module,exports){ /** * @file remove-cues-from-track.js */ /** * Remove cues from a track on video.js. * * @param {Double} start start of where we should remove the cue * @param {Double} end end of where the we should remove the cue * @param {Object} track the text track to remove the cues from * @private */ "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); var removeCuesFromTrack = function removeCuesFromTrack(start, end, track) { var i = undefined; var cue = undefined; if (!track) { return; } if (!track.cues) { return; } i = track.cues.length; while (i--) { cue = track.cues[i]; // Remove any overlapping cue if (cue.startTime <= end && cue.endTime >= start) { track.removeCue(cue); } } }; exports["default"] = removeCuesFromTrack; module.exports = exports["default"]; },{}],72:[function(require,module,exports){ /** * @file transmuxer-worker.js */ /** * videojs-contrib-media-sources * * Copyright (c) 2015 Brightcove * All rights reserved. * * Handles communication between the browser-world and the mux.js * transmuxer running inside of a WebWorker by exposing a simple * message-based interface to a Transmuxer object. */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _muxJsLibMp4 = require('mux.js/lib/mp4'); var _muxJsLibMp42 = _interopRequireDefault(_muxJsLibMp4); /** * Re-emits transmuxer events by converting them into messages to the * world outside the worker. * * @param {Object} transmuxer the transmuxer to wire events on * @private */ var wireTransmuxerEvents = function wireTransmuxerEvents(transmuxer) { transmuxer.on('data', function (segment) { // transfer ownership of the underlying ArrayBuffer // instead of doing a copy to save memory // ArrayBuffers are transferable but generic TypedArrays are not // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects) var initArray = segment.initSegment; segment.initSegment = { data: initArray.buffer, byteOffset: initArray.byteOffset, byteLength: initArray.byteLength }; var typedArray = segment.data; segment.data = typedArray.buffer; _globalWindow2['default'].postMessage({ action: 'data', segment: segment, byteOffset: typedArray.byteOffset, byteLength: typedArray.byteLength }, [segment.data]); }); if (transmuxer.captionStream) { transmuxer.captionStream.on('data', function (caption) { _globalWindow2['default'].postMessage({ action: 'caption', data: caption }); }); } transmuxer.on('done', function (data) { _globalWindow2['default'].postMessage({ action: 'done' }); }); }; /** * All incoming messages route through this hash. If no function exists * to handle an incoming message, then we ignore the message. * * @class MessageHandlers * @param {Object} options the options to initialize with */ var MessageHandlers = (function () { function MessageHandlers(options) { _classCallCheck(this, MessageHandlers); this.options = options || {}; this.init(); } /** * Our web wroker interface so that things can talk to mux.js * that will be running in a web worker. the scope is passed to this by * webworkify. * * @param {Object} self the scope for the web worker */ /** * initialize our web worker and wire all the events. */ _createClass(MessageHandlers, [{ key: 'init', value: function init() { if (this.transmuxer) { this.transmuxer.dispose(); } this.transmuxer = new _muxJsLibMp42['default'].Transmuxer(this.options); wireTransmuxerEvents(this.transmuxer); } /** * Adds data (a ts segment) to the start of the transmuxer pipeline for * processing. * * @param {ArrayBuffer} data data to push into the muxer */ }, { key: 'push', value: function push(data) { // Cast array buffer to correct type for transmuxer var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength); this.transmuxer.push(segment); } /** * Recreate the transmuxer so that the next segment added via `push` * start with a fresh transmuxer. */ }, { key: 'reset', value: function reset() { this.init(); } /** * Set the value that will be used as the `baseMediaDecodeTime` time for the * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime` * set relative to the first based on the PTS values. * * @param {Object} data used to set the timestamp offset in the muxer */ }, { key: 'setTimestampOffset', value: function setTimestampOffset(data) { var timestampOffset = data.timestampOffset || 0; this.transmuxer.setBaseMediaDecodeTime(Math.round(timestampOffset * 90000)); } }, { key: 'setAudioAppendStart', value: function setAudioAppendStart(data) { this.transmuxer.setAudioAppendStart(Math.ceil(data.appendStart * 90000)); } /** * Forces the pipeline to finish processing the last segment and emit it's * results. * * @param {Object} data event data, not really used */ }, { key: 'flush', value: function flush(data) { this.transmuxer.flush(); } }]); return MessageHandlers; })(); var TransmuxerWorker = function TransmuxerWorker(self) { self.onmessage = function (event) { if (event.data.action === 'init' && event.data.options) { this.messageHandlers = new MessageHandlers(event.data.options); return; } if (!this.messageHandlers) { this.messageHandlers = new MessageHandlers(); } if (event.data && event.data.action && event.data.action !== 'init') { if (this.messageHandlers[event.data.action]) { this.messageHandlers[event.data.action](event.data); } } }; }; exports['default'] = function (self) { return new TransmuxerWorker(self); }; module.exports = exports['default']; },{"global/window":30,"mux.js/lib/mp4":53}],73:[function(require,module,exports){ (function (global){ /** * @file videojs-contrib-media-sources.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _flashMediaSource = require('./flash-media-source'); var _flashMediaSource2 = _interopRequireDefault(_flashMediaSource); var _htmlMediaSource = require('./html-media-source'); var _htmlMediaSource2 = _interopRequireDefault(_htmlMediaSource); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var urlCount = 0; // ------------ // Media Source // ------------ var defaults = { // how to determine the MediaSource implementation to use. There // are three available modes: // - auto: use native MediaSources where available and Flash // everywhere else // - html5: always use native MediaSources // - flash: always use the Flash MediaSource polyfill mode: 'auto' }; // store references to the media sources so they can be connected // to a video element (a swf object) // TODO: can we store this somewhere local to this module? _videoJs2['default'].mediaSources = {}; /** * Provide a method for a swf object to notify JS that a * media source is now open. * * @param {String} msObjectURL string referencing the MSE Object URL * @param {String} swfId the swf id */ var open = function open(msObjectURL, swfId) { var mediaSource = _videoJs2['default'].mediaSources[msObjectURL]; if (mediaSource) { mediaSource.trigger({ type: 'sourceopen', swfId: swfId }); } else { throw new Error('Media Source not found (Video.js)'); } }; /** * Check to see if the native MediaSource object exists and supports * an MP4 container with both H.264 video and AAC-LC audio. * * @return {Boolean} if native media sources are supported */ var supportsNativeMediaSources = function supportsNativeMediaSources() { return !!_globalWindow2['default'].MediaSource && !!_globalWindow2['default'].MediaSource.isTypeSupported && _globalWindow2['default'].MediaSource.isTypeSupported('video/mp4;codecs="avc1.4d400d,mp4a.40.2"'); }; /** * An emulation of the MediaSource API so that we can support * native and non-native functionality such as flash and * video/mp2t videos. returns an instance of HtmlMediaSource or * FlashMediaSource depending on what is supported and what options * are passed in. * * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/MediaSource * @param {Object} options options to use during setup. */ var MediaSource = function MediaSource(options) { var settings = _videoJs2['default'].mergeOptions(defaults, options); this.MediaSource = { open: open, supportsNativeMediaSources: supportsNativeMediaSources }; // determine whether HTML MediaSources should be used if (settings.mode === 'html5' || settings.mode === 'auto' && supportsNativeMediaSources()) { return new _htmlMediaSource2['default'](); } else if (_videoJs2['default'].getTech('Flash')) { return new _flashMediaSource2['default'](); } throw new Error('Cannot use Flash or Html5 to create a MediaSource for this video'); }; exports.MediaSource = MediaSource; MediaSource.open = open; MediaSource.supportsNativeMediaSources = supportsNativeMediaSources; /** * A wrapper around the native URL for our MSE object * implementation, this object is exposed under videojs.URL * * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/URL */ var URL = { /** * A wrapper around the native createObjectURL for our objects. * This function maps a native or emulated mediaSource to a blob * url so that it can be loaded into video.js * * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL * @param {MediaSource} object the object to create a blob url to */ createObjectURL: function createObjectURL(object) { var objectUrlPrefix = 'blob:vjs-media-source/'; var url = undefined; // use the native MediaSource to generate an object URL if (object instanceof _htmlMediaSource2['default']) { url = _globalWindow2['default'].URL.createObjectURL(object.nativeMediaSource_); object.url_ = url; return url; } // if the object isn't an emulated MediaSource, delegate to the // native implementation if (!(object instanceof _flashMediaSource2['default'])) { url = _globalWindow2['default'].URL.createObjectURL(object); object.url_ = url; return url; } // build a URL that can be used to map back to the emulated // MediaSource url = objectUrlPrefix + urlCount; urlCount++; // setup the mapping back to object _videoJs2['default'].mediaSources[url] = object; return url; } }; exports.URL = URL; _videoJs2['default'].MediaSource = MediaSource; _videoJs2['default'].URL = URL; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./flash-media-source":67,"./html-media-source":70,"global/window":30}],74:[function(require,module,exports){ (function (global){ /** * @file virtual-source-buffer.js */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _createTextTracksIfNecessary = require('./create-text-tracks-if-necessary'); var _createTextTracksIfNecessary2 = _interopRequireDefault(_createTextTracksIfNecessary); var _removeCuesFromTrack = require('./remove-cues-from-track'); var _removeCuesFromTrack2 = _interopRequireDefault(_removeCuesFromTrack); var _addTextTrackData = require('./add-text-track-data'); var _webworkify = require('webworkify'); var _webworkify2 = _interopRequireDefault(_webworkify); var _transmuxerWorker = require('./transmuxer-worker'); var _transmuxerWorker2 = _interopRequireDefault(_transmuxerWorker); var _codecUtils = require('./codec-utils'); /** * VirtualSourceBuffers exist so that we can transmux non native formats * into a native format, but keep the same api as a native source buffer. * It creates a transmuxer, that works in its own thread (a web worker) and * that transmuxer muxes the data into a native format. VirtualSourceBuffer will * then send all of that data to the naive sourcebuffer so that it is * indestinguishable from a natively supported format. * * @param {HtmlMediaSource} mediaSource the parent mediaSource * @param {Array} codecs array of codecs that we will be dealing with * @class VirtualSourceBuffer * @extends video.js.EventTarget */ var VirtualSourceBuffer = (function (_videojs$EventTarget) { _inherits(VirtualSourceBuffer, _videojs$EventTarget); function VirtualSourceBuffer(mediaSource, codecs) { var _this = this; _classCallCheck(this, VirtualSourceBuffer); _get(Object.getPrototypeOf(VirtualSourceBuffer.prototype), 'constructor', this).call(this, _videoJs2['default'].EventTarget); this.timestampOffset_ = 0; this.pendingBuffers_ = []; this.bufferUpdating_ = false; this.mediaSource_ = mediaSource; this.codecs_ = codecs; this.audioCodec_ = null; this.videoCodec_ = null; this.audioDisabled_ = false; this.appendAudioInitSegment_ = true; var options = { remux: false }; this.codecs_.forEach(function (codec) { if ((0, _codecUtils.isAudioCodec)(codec)) { _this.audioCodec_ = codec; } else if ((0, _codecUtils.isVideoCodec)(codec)) { _this.videoCodec_ = codec; } }); // append muxed segments to their respective native buffers as // soon as they are available this.transmuxer_ = (0, _webworkify2['default'])(_transmuxerWorker2['default']); this.transmuxer_.postMessage({ action: 'init', options: options }); this.transmuxer_.onmessage = function (event) { if (event.data.action === 'data') { return _this.data_(event); } if (event.data.action === 'done') { return _this.done_(event); } }; // this timestampOffset is a property with the side-effect of resetting // baseMediaDecodeTime in the transmuxer on the setter Object.defineProperty(this, 'timestampOffset', { get: function get() { return this.timestampOffset_; }, set: function set(val) { if (typeof val === 'number' && val >= 0) { this.timestampOffset_ = val; this.appendAudioInitSegment_ = true; // We have to tell the transmuxer to set the baseMediaDecodeTime to // the desired timestampOffset for the next segment this.transmuxer_.postMessage({ action: 'setTimestampOffset', timestampOffset: val }); } } }); // setting the append window affects both source buffers Object.defineProperty(this, 'appendWindowStart', { get: function get() { return (this.videoBuffer_ || this.audioBuffer_).appendWindowStart; }, set: function set(start) { if (this.videoBuffer_) { this.videoBuffer_.appendWindowStart = start; } if (this.audioBuffer_) { this.audioBuffer_.appendWindowStart = start; } } }); // this buffer is "updating" if either of its native buffers are Object.defineProperty(this, 'updating', { get: function get() { return !!(this.bufferUpdating_ || !this.audioDisabled_ && this.audioBuffer_ && this.audioBuffer_.updating || this.videoBuffer_ && this.videoBuffer_.updating); } }); // the buffered property is the intersection of the buffered // ranges of the native source buffers Object.defineProperty(this, 'buffered', { get: function get() { var start = null; var end = null; var arity = 0; var extents = []; var ranges = []; // neither buffer has been created yet if (!this.videoBuffer_ && !this.audioBuffer_) { return _videoJs2['default'].createTimeRange(); } // only one buffer is configured if (!this.videoBuffer_) { return this.audioBuffer_.buffered; } if (!this.audioBuffer_) { return this.videoBuffer_.buffered; } // both buffers are configured if (this.audioDisabled_) { return this.videoBuffer_.buffered; } // both buffers are empty if (this.videoBuffer_.buffered.length === 0 && this.audioBuffer_.buffered.length === 0) { return _videoJs2['default'].createTimeRange(); } // Handle the case where we have both buffers and create an // intersection of the two var videoBuffered = this.videoBuffer_.buffered; var audioBuffered = this.audioBuffer_.buffered; var count = videoBuffered.length; // A) Gather up all start and end times while (count--) { extents.push({ time: videoBuffered.start(count), type: 'start' }); extents.push({ time: videoBuffered.end(count), type: 'end' }); } count = audioBuffered.length; while (count--) { extents.push({ time: audioBuffered.start(count), type: 'start' }); extents.push({ time: audioBuffered.end(count), type: 'end' }); } // B) Sort them by time extents.sort(function (a, b) { return a.time - b.time; }); // C) Go along one by one incrementing arity for start and decrementing // arity for ends for (count = 0; count < extents.length; count++) { if (extents[count].type === 'start') { arity++; // D) If arity is ever incremented to 2 we are entering an // overlapping range if (arity === 2) { start = extents[count].time; } } else if (extents[count].type === 'end') { arity--; // E) If arity is ever decremented to 1 we leaving an // overlapping range if (arity === 1) { end = extents[count].time; } } // F) Record overlapping ranges if (start !== null && end !== null) { ranges.push([start, end]); start = null; end = null; } } return _videoJs2['default'].createTimeRanges(ranges); } }); } /** * When we get a data event from the transmuxer * we call this function and handle the data that * was sent to us * * @private * @param {Event} event the data event from the transmuxer */ _createClass(VirtualSourceBuffer, [{ key: 'data_', value: function data_(event) { var segment = event.data.segment; // Cast ArrayBuffer to TypedArray segment.data = new Uint8Array(segment.data, event.data.byteOffset, event.data.byteLength); segment.initSegment = new Uint8Array(segment.initSegment.data, segment.initSegment.byteOffset, segment.initSegment.byteLength); (0, _createTextTracksIfNecessary2['default'])(this, this.mediaSource_, segment); // Add the segments to the pendingBuffers array this.pendingBuffers_.push(segment); return; } /** * When we get a done event from the transmuxer * we call this function and we process all * of the pending data that we have been saving in the * data_ function * * @private * @param {Event} event the done event from the transmuxer */ }, { key: 'done_', value: function done_(event) { // All buffers should have been flushed from the muxer // start processing anything we have received this.processPendingSegments_(); return; } /** * Create our internal native audio/video source buffers and add * event handlers to them with the following conditions: * 1. they do not already exist on the mediaSource * 2. this VSB has a codec for them * * @private */ }, { key: 'createRealSourceBuffers_', value: function createRealSourceBuffers_() { var _this2 = this; var types = ['audio', 'video']; types.forEach(function (type) { // Don't create a SourceBuffer of this type if we don't have a // codec for it if (!_this2[type + 'Codec_']) { return; } // Do nothing if a SourceBuffer of this type already exists if (_this2[type + 'Buffer_']) { return; } var buffer = null; // If the mediasource already has a SourceBuffer for the codec // use that if (_this2.mediaSource_[type + 'Buffer_']) { buffer = _this2.mediaSource_[type + 'Buffer_']; } else { buffer = _this2.mediaSource_.nativeMediaSource_.addSourceBuffer(type + '/mp4;codecs="' + _this2[type + 'Codec_'] + '"'); _this2.mediaSource_[type + 'Buffer_'] = buffer; } _this2[type + 'Buffer_'] = buffer; // Wire up the events to the SourceBuffer ['update', 'updatestart', 'updateend'].forEach(function (event) { buffer.addEventListener(event, function () { // if audio is disabled if (type === 'audio' && _this2.audioDisabled_) { return; } var shouldTrigger = types.every(function (t) { // skip checking audio's updating status if audio // is not enabled if (t === 'audio' && _this2.audioDisabled_) { return true; } // if the other type if updating we don't trigger if (type !== t && _this2[t + 'Buffer_'] && _this2[t + 'Buffer_'].updating) { return false; } return true; }); if (shouldTrigger) { return _this2.trigger(event); } }); }); }); } /** * Emulate the native mediasource function, but our function will * send all of the proposed segments to the transmuxer so that we * can transmux them before we append them to our internal * native source buffers in the correct format. * * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/appendBuffer * @param {Uint8Array} segment the segment to append to the buffer */ }, { key: 'appendBuffer', value: function appendBuffer(segment) { // Start the internal "updating" state this.bufferUpdating_ = true; if (this.audioBuffer_ && this.audioBuffer_.buffered.length) { var audioBuffered = this.audioBuffer_.buffered; this.transmuxer_.postMessage({ action: 'setAudioAppendStart', appendStart: audioBuffered.end(audioBuffered.length - 1) }); } this.transmuxer_.postMessage({ action: 'push', // Send the typed-array of data as an ArrayBuffer so that // it can be sent as a "Transferable" and avoid the costly // memory copy data: segment.buffer, // To recreate the original typed-array, we need information // about what portion of the ArrayBuffer it was a view into byteOffset: segment.byteOffset, byteLength: segment.byteLength }, [segment.buffer]); this.transmuxer_.postMessage({ action: 'flush' }); } /** * Emulate the native mediasource function and remove parts * of the buffer from any of our internal buffers that exist * * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/remove * @param {Double} start position to start the remove at * @param {Double} end position to end the remove at */ }, { key: 'remove', value: function remove(start, end) { if (this.videoBuffer_) { this.videoBuffer_.remove(start, end); } if (this.audioBuffer_) { this.audioBuffer_.remove(start, end); } // Remove Metadata Cues (id3) (0, _removeCuesFromTrack2['default'])(start, end, this.metadataTrack_); // Remove Any Captions (0, _removeCuesFromTrack2['default'])(start, end, this.inbandTextTrack_); } /** * Process any segments that the muxer has output * Concatenate segments together based on type and append them into * their respective sourceBuffers * * @private */ }, { key: 'processPendingSegments_', value: function processPendingSegments_() { var sortedSegments = { video: { segments: [], bytes: 0 }, audio: { segments: [], bytes: 0 }, captions: [], metadata: [] }; // Sort segments into separate video/audio arrays and // keep track of their total byte lengths sortedSegments = this.pendingBuffers_.reduce(function (segmentObj, segment) { var type = segment.type; var data = segment.data; var initSegment = segment.initSegment; segmentObj[type].segments.push(data); segmentObj[type].bytes += data.byteLength; segmentObj[type].initSegment = initSegment; // Gather any captions into a single array if (segment.captions) { segmentObj.captions = segmentObj.captions.concat(segment.captions); } if (segment.info) { segmentObj[type].info = segment.info; } // Gather any metadata into a single array if (segment.metadata) { segmentObj.metadata = segmentObj.metadata.concat(segment.metadata); } return segmentObj; }, sortedSegments); // Create the real source buffers if they don't exist by now since we // finally are sure what tracks are contained in the source if (!this.videoBuffer_ && !this.audioBuffer_) { // Remove any codecs that may have been specified by default but // are no longer applicable now if (sortedSegments.video.bytes === 0) { this.videoCodec_ = null; } if (sortedSegments.audio.bytes === 0) { this.audioCodec_ = null; } this.createRealSourceBuffers_(); } if (sortedSegments.audio.info) { this.mediaSource_.trigger({ type: 'audioinfo', info: sortedSegments.audio.info }); } if (sortedSegments.video.info) { this.mediaSource_.trigger({ type: 'videoinfo', info: sortedSegments.video.info }); } if (this.appendAudioInitSegment_) { if (!this.audioDisabled_ && this.audioBuffer_) { sortedSegments.audio.segments.unshift(sortedSegments.audio.initSegment); sortedSegments.audio.bytes += sortedSegments.audio.initSegment.byteLength; } this.appendAudioInitSegment_ = false; } // Merge multiple video and audio segments into one and append if (this.videoBuffer_) { sortedSegments.video.segments.unshift(sortedSegments.video.initSegment); sortedSegments.video.bytes += sortedSegments.video.initSegment.byteLength; this.concatAndAppendSegments_(sortedSegments.video, this.videoBuffer_); // TODO: are video tracks the only ones with text tracks? (0, _addTextTrackData.addTextTrackData)(this, sortedSegments.captions, sortedSegments.metadata); } if (!this.audioDisabled_ && this.audioBuffer_) { this.concatAndAppendSegments_(sortedSegments.audio, this.audioBuffer_); } this.pendingBuffers_.length = 0; // We are no longer in the internal "updating" state this.bufferUpdating_ = false; } /** * Combine all segments into a single Uint8Array and then append them * to the destination buffer * * @param {Object} segmentObj * @param {SourceBuffer} destinationBuffer native source buffer to append data to * @private */ }, { key: 'concatAndAppendSegments_', value: function concatAndAppendSegments_(segmentObj, destinationBuffer) { var offset = 0; var tempBuffer = undefined; if (segmentObj.bytes) { tempBuffer = new Uint8Array(segmentObj.bytes); // Combine the individual segments into one large typed-array segmentObj.segments.forEach(function (segment) { tempBuffer.set(segment, offset); offset += segment.byteLength; }); try { destinationBuffer.appendBuffer(tempBuffer); } catch (error) { if (this.mediaSource_.player_) { this.mediaSource_.player_.error({ code: -3, type: 'APPEND_BUFFER_ERR', message: error.message, originalError: error }); } } } } /** * Emulate the native mediasource function. abort any soureBuffer * actions and throw out any un-appended data. * * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/abort */ }, { key: 'abort', value: function abort() { if (this.videoBuffer_) { this.videoBuffer_.abort(); } if (this.audioBuffer_) { this.audioBuffer_.abort(); } if (this.transmuxer_) { this.transmuxer_.postMessage({ action: 'reset' }); } this.pendingBuffers_.length = 0; this.bufferUpdating_ = false; } }]); return VirtualSourceBuffer; })(_videoJs2['default'].EventTarget); exports['default'] = VirtualSourceBuffer; module.exports = exports['default']; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./add-text-track-data":62,"./codec-utils":64,"./create-text-tracks-if-necessary":65,"./remove-cues-from-track":71,"./transmuxer-worker":72,"webworkify":75}],75:[function(require,module,exports){ var bundleFn = arguments[3]; var sources = arguments[4]; var cache = arguments[5]; var stringify = JSON.stringify; module.exports = function (fn) { var keys = []; var wkey; var cacheKeys = Object.keys(cache); for (var i = 0, l = cacheKeys.length; i < l; i++) { var key = cacheKeys[i]; if (cache[key].exports === fn) { wkey = key; break; } } if (!wkey) { wkey = Math.floor(Math.pow(16, 8) * Math.random()).toString(16); var wcache = {}; for (var i = 0, l = cacheKeys.length; i < l; i++) { var key = cacheKeys[i]; wcache[key] = key; } sources[wkey] = [ Function(['require','module','exports'], '(' + fn + ')(self)'), wcache ]; } var skey = Math.floor(Math.pow(16, 8) * Math.random()).toString(16); var scache = {}; scache[wkey] = wkey; sources[skey] = [ Function(['require'],'require(' + stringify(wkey) + ')(self)'), scache ]; var src = '(' + bundleFn + ')({' + Object.keys(sources).map(function (key) { return stringify(key) + ':[' + sources[key][0] + ',' + stringify(sources[key][1]) + ']' ; }).join(',') + '},{},[' + stringify(skey) + '])' ; var URL = window.URL || window.webkitURL || window.mozURL || window.msURL; return new Worker(URL.createObjectURL( new Blob([src], { type: 'text/javascript' }) )); }; },{}],76:[function(require,module,exports){ (function (global){ /** * @file videojs-contrib-hls.js * * The main file for the HLS project. * License: https://github.com/videojs/videojs-contrib-hls/blob/master/LICENSE */ 'use strict'; var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })(); var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } var _globalDocument = require('global/document'); var _globalDocument2 = _interopRequireDefault(_globalDocument); var _playlistLoader = require('./playlist-loader'); var _playlistLoader2 = _interopRequireDefault(_playlistLoader); var _playlist = require('./playlist'); var _playlist2 = _interopRequireDefault(_playlist); var _xhr = require('./xhr'); var _xhr2 = _interopRequireDefault(_xhr); var _aesDecrypter = require('aes-decrypter'); var _binUtils = require('./bin-utils'); var _binUtils2 = _interopRequireDefault(_binUtils); var _videojsContribMediaSources = require('videojs-contrib-media-sources'); var _m3u8Parser = require('m3u8-parser'); var _m3u8Parser2 = _interopRequireDefault(_m3u8Parser); var _videoJs = (typeof window !== "undefined" ? window['videojs'] : typeof global !== "undefined" ? global['videojs'] : null); var _videoJs2 = _interopRequireDefault(_videoJs); var _masterPlaylistController = require('./master-playlist-controller'); var _config = require('./config'); var _config2 = _interopRequireDefault(_config); var _renditionMixin = require('./rendition-mixin'); var _renditionMixin2 = _interopRequireDefault(_renditionMixin); var _globalWindow = require('global/window'); var _globalWindow2 = _interopRequireDefault(_globalWindow); var _playbackWatcher = require('./playback-watcher'); var _playbackWatcher2 = _interopRequireDefault(_playbackWatcher); var _reloadSourceOnError = require('./reload-source-on-error'); var _reloadSourceOnError2 = _interopRequireDefault(_reloadSourceOnError); var Hls = { PlaylistLoader: _playlistLoader2['default'], Playlist: _playlist2['default'], Decrypter: _aesDecrypter.Decrypter, AsyncStream: _aesDecrypter.AsyncStream, decrypt: _aesDecrypter.decrypt, utils: _binUtils2['default'], xhr: (0, _xhr2['default'])() }; Object.defineProperty(Hls, 'GOAL_BUFFER_LENGTH', { get: function get() { _videoJs2['default'].log.warn('using Hls.GOAL_BUFFER_LENGTH is UNSAFE be sure ' + 'you know what you are doing'); return _config2['default'].GOAL_BUFFER_LENGTH; }, set: function set(v) { _videoJs2['default'].log.warn('using Hls.GOAL_BUFFER_LENGTH is UNSAFE be sure ' + 'you know what you are doing'); if (typeof v !== 'number' || v <= 0) { _videoJs2['default'].log.warn('value passed to Hls.GOAL_BUFFER_LENGTH ' + 'must be a number and greater than 0'); return; } _config2['default'].GOAL_BUFFER_LENGTH = v; } }); // A fudge factor to apply to advertised playlist bitrates to account for // temporary flucations in client bandwidth var BANDWIDTH_VARIANCE = 1.2; /** * Returns the CSS value for the specified property on an element * using `getComputedStyle`. Firefox has a long-standing issue where * getComputedStyle() may return null when running in an iframe with * `display: none`. * * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397 * @param {HTMLElement} el the htmlelement to work on * @param {string} the proprety to get the style for */ var safeGetComputedStyle = function safeGetComputedStyle(el, property) { var result = undefined; if (!el) { return ''; } result = _globalWindow2['default'].getComputedStyle(el); if (!result) { return ''; } return result[property]; }; /** * Updates the selectedIndex of the QualityLevelList when a mediachange happens in hls. * * @param {QualityLevelList} qualityLevels The QualityLevelList to update. * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info. * @function handleHlsMediaChange */ var handleHlsMediaChange = function handleHlsMediaChange(qualityLevels, playlistLoader) { var newPlaylist = playlistLoader.media(); var selectedIndex = -1; for (var i = 0; i < qualityLevels.length; i++) { if (qualityLevels[i].id === newPlaylist.uri) { selectedIndex = i; break; } } qualityLevels.selectedIndex_ = selectedIndex; qualityLevels.trigger({ selectedIndex: selectedIndex, type: 'change' }); }; /** * Adds quality levels to list once playlist metadata is available * * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to. * @param {Object} hls Hls object to listen to for media events. * @function handleHlsLoadedMetadata */ var handleHlsLoadedMetadata = function handleHlsLoadedMetadata(qualityLevels, hls) { hls.representations().forEach(function (rep) { qualityLevels.addQualityLevel(rep); }); handleHlsMediaChange(qualityLevels, hls.playlists); }; /** * Resuable stable sort function * * @param {Playlists} array * @param {Function} sortFn Different comparators * @function stableSort */ var stableSort = function stableSort(array, sortFn) { var newArray = array.slice(); array.sort(function (left, right) { var cmp = sortFn(left, right); if (cmp === 0) { return newArray.indexOf(left) - newArray.indexOf(right); } return cmp; }); }; /** * Chooses the appropriate media playlist based on the current * bandwidth estimate and the player size. * * @return {Playlist} the highest bitrate playlist less than the currently detected * bandwidth, accounting for some amount of bandwidth variance */ Hls.STANDARD_PLAYLIST_SELECTOR = function () { var sortedPlaylists = this.playlists.master.playlists.slice(); var bandwidthPlaylists = []; var bandwidthBestVariant = undefined; var resolutionPlusOne = undefined; var resolutionBestVariant = undefined; var width = undefined; var height = undefined; var systemBandwidth = undefined; var haveResolution = undefined; var resolutionPlusOneList = []; var resolutionPlusOneSmallest = []; var resolutionBestVariantList = []; stableSort(sortedPlaylists, Hls.comparePlaylistBandwidth); // filter out any playlists that have been excluded due to // incompatible configurations or playback errors sortedPlaylists = sortedPlaylists.filter(_playlist2['default'].isEnabled); // filter out any variant that has greater effective bitrate // than the current estimated bandwidth systemBandwidth = this.systemBandwidth; bandwidthPlaylists = sortedPlaylists.filter(function (elem) { return elem.attributes && elem.attributes.BANDWIDTH && elem.attributes.BANDWIDTH * BANDWIDTH_VARIANCE < systemBandwidth; }); // get all of the renditions with the same (highest) bandwidth // and then taking the very first element bandwidthBestVariant = bandwidthPlaylists.filter(function (elem) { return elem.attributes.BANDWIDTH === bandwidthPlaylists[bandwidthPlaylists.length - 1].attributes.BANDWIDTH; })[0]; // sort variants by resolution stableSort(bandwidthPlaylists, Hls.comparePlaylistResolution); width = parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10); height = parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10); // filter out playlists without resolution information haveResolution = bandwidthPlaylists.filter(function (elem) { return elem.attributes && elem.attributes.RESOLUTION && elem.attributes.RESOLUTION.width && elem.attributes.RESOLUTION.height; }); // if we have the exact resolution as the player use it resolutionBestVariantList = haveResolution.filter(function (elem) { return elem.attributes.RESOLUTION.width === width && elem.attributes.RESOLUTION.height === height; }); // ensure that we pick the highest bandwidth variant that have exact resolution resolutionBestVariant = resolutionBestVariantList.filter(function (elem) { return elem.attributes.BANDWIDTH === resolutionBestVariantList[resolutionBestVariantList.length - 1].attributes.BANDWIDTH; })[0]; // find the smallest variant that is larger than the player // if there is no match of exact resolution if (!resolutionBestVariant) { resolutionPlusOneList = haveResolution.filter(function (elem) { return elem.attributes.RESOLUTION.width > width || elem.attributes.RESOLUTION.height > height; }); // find all the variants have the same smallest resolution resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (elem) { return elem.attributes.RESOLUTION.width === resolutionPlusOneList[0].attributes.RESOLUTION.width && elem.attributes.RESOLUTION.height === resolutionPlusOneList[0].attributes.RESOLUTION.height; }); // ensure that we also pick the highest bandwidth variant that // is just-larger-than the video player resolutionPlusOne = resolutionPlusOneSmallest.filter(function (elem) { return elem.attributes.BANDWIDTH === resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1].attributes.BANDWIDTH; })[0]; } // fallback chain of variants return resolutionPlusOne || resolutionBestVariant || bandwidthBestVariant || sortedPlaylists[0]; }; // HLS is a source handler, not a tech. Make sure attempts to use it // as one do not cause exceptions. Hls.canPlaySource = function () { return _videoJs2['default'].log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\'s techOrder.'); }; /** * Whether the browser has built-in HLS support. */ Hls.supportsNativeHls = (function () { var video = _globalDocument2['default'].createElement('video'); // native HLS is definitely not supported if HTML5 video isn't if (!_videoJs2['default'].getTech('Html5').isSupported()) { return false; } // HLS manifests can go by many mime-types var canPlay = [ // Apple santioned 'application/vnd.apple.mpegurl', // Apple sanctioned for backwards compatibility 'audio/mpegurl', // Very common 'audio/x-mpegurl', // Very common 'application/x-mpegurl', // Included for completeness 'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl']; return canPlay.some(function (canItPlay) { return (/maybe|probably/i.test(video.canPlayType(canItPlay)) ); }); })(); /** * HLS is a source handler, not a tech. Make sure attempts to use it * as one do not cause exceptions. */ Hls.isSupported = function () { return _videoJs2['default'].log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\'s techOrder.'); }; var USER_AGENT = _globalWindow2['default'].navigator && _globalWindow2['default'].navigator.userAgent || ''; /** * Determines whether the browser supports a change in the audio configuration * during playback. Currently only Firefox 48 and below do not support this. * window.isSecureContext is a propterty that was added to window in firefox 49, * so we can use it to detect Firefox 49+. * * @return {Boolean} Whether the browser supports audio config change during playback */ Hls.supportsAudioInfoChange_ = function () { if (_videoJs2['default'].browser.IS_FIREFOX) { var firefoxVersionMap = /Firefox\/([\d.]+)/i.exec(USER_AGENT); var version = parseInt(firefoxVersionMap[1], 10); return version >= 49; } return true; }; var Component = _videoJs2['default'].getComponent('Component'); /** * The Hls Handler object, where we orchestrate all of the parts * of HLS to interact with video.js * * @class HlsHandler * @extends videojs.Component * @param {Object} source the soruce object * @param {Tech} tech the parent tech object * @param {Object} options optional and required options */ var HlsHandler = (function (_Component) { _inherits(HlsHandler, _Component); function HlsHandler(source, tech, options) { var _this = this; _classCallCheck(this, HlsHandler); _get(Object.getPrototypeOf(HlsHandler.prototype), 'constructor', this).call(this, tech); // tech.player() is deprecated but setup a reference to HLS for // backwards-compatibility if (tech.options_ && tech.options_.playerId) { var _player = (0, _videoJs2['default'])(tech.options_.playerId); if (!_player.hasOwnProperty('hls')) { Object.defineProperty(_player, 'hls', { get: function get() { _videoJs2['default'].log.warn('player.hls is deprecated. Use player.tech_.hls instead.'); return _this; } }); } } // overriding native HLS only works if audio tracks have been emulated // error early if we're misconfigured: if (_videoJs2['default'].options.hls.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) { throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB'); } this.tech_ = tech; this.source_ = source; this.stats = {}; this.ignoreNextSeekingEvent_ = false; // handle global & Source Handler level options this.options_ = _videoJs2['default'].mergeOptions(_videoJs2['default'].options.hls || {}, options.hls); this.setOptions_(); // listen for fullscreenchange events for this player so that we // can adjust our quality selection quickly this.on(_globalDocument2['default'], ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) { var fullscreenElement = _globalDocument2['default'].fullscreenElement || _globalDocument2['default'].webkitFullscreenElement || _globalDocument2['default'].mozFullScreenElement || _globalDocument2['default'].msFullscreenElement; if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) { _this.masterPlaylistController_.fastQualityChange_(); } }); this.on(this.tech_, 'seeking', function () { if (this.ignoreNextSeekingEvent_) { this.ignoreNextSeekingEvent_ = false; return; } this.setCurrentTime(this.tech_.currentTime()); }); this.on(this.tech_, 'error', function () { if (this.masterPlaylistController_) { this.masterPlaylistController_.pauseLoading(); } }); this.audioTrackChange_ = function () { _this.masterPlaylistController_.setupAudio(); }; this.textTrackChange_ = function () { _this.masterPlaylistController_.setupSubtitles(); }; this.on(this.tech_, 'play', this.play); } /** * The Source Handler object, which informs video.js what additional * MIME types are supported and sets up playback. It is registered * automatically to the appropriate tech based on the capabilities of * the browser it is running in. It is not necessary to use or modify * this object in normal usage. */ _createClass(HlsHandler, [{ key: 'setOptions_', value: function setOptions_() { var _this2 = this; // defaults this.options_.withCredentials = this.options_.withCredentials || false; if (typeof this.options_.blacklistDuration !== 'number') { this.options_.blacklistDuration = 5 * 60; } // start playlist selection at a reasonable bandwidth for // broadband internet // 0.5 MB/s if (typeof this.options_.bandwidth !== 'number') { this.options_.bandwidth = 4194304; } // grab options passed to player.src ['withCredentials', 'bandwidth'].forEach(function (option) { if (typeof _this2.source_[option] !== 'undefined') { _this2.options_[option] = _this2.source_[option]; } }); this.bandwidth = this.options_.bandwidth; } /** * called when player.src gets called, handle a new source * * @param {Object} src the source object to handle */ }, { key: 'src', value: function src(_src) { var _this3 = this; // do nothing if the src is falsey if (!_src) { return; } this.setOptions_(); // add master playlist controller options this.options_.url = this.source_.src; this.options_.tech = this.tech_; this.options_.externHls = Hls; this.masterPlaylistController_ = new _masterPlaylistController.MasterPlaylistController(this.options_); this.playbackWatcher_ = new _playbackWatcher2['default'](_videoJs2['default'].mergeOptions(this.options_, { seekable: function seekable() { return _this3.seekable(); } })); this.masterPlaylistController_.on('error', function () { var player = _videoJs2['default'].players[_this3.tech_.options_.playerId]; player.error(_this3.masterPlaylistController_.error); }); // `this` in selectPlaylist should be the HlsHandler for backwards // compatibility with < v2 this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : Hls.STANDARD_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2 this.playlists = this.masterPlaylistController_.masterPlaylistLoader_; this.mediaSource = this.masterPlaylistController_.mediaSource; // Proxy assignment of some properties to the master playlist // controller. Using a custom property for backwards compatibility // with < v2 Object.defineProperties(this, { selectPlaylist: { get: function get() { return this.masterPlaylistController_.selectPlaylist; }, set: function set(selectPlaylist) { this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this); } }, throughput: { get: function get() { return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate; }, set: function set(throughput) { this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value // for the cumulative average this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1; } }, bandwidth: { get: function get() { return this.masterPlaylistController_.mainSegmentLoader_.bandwidth; }, set: function set(bandwidth) { this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter // `count` is set to zero that current value of `rate` isn't included // in the cumulative average this.masterPlaylistController_.mainSegmentLoader_.throughput = { rate: 0, count: 0 }; } }, /** * `systemBandwidth` is a combination of two serial processes bit-rates. The first * is the network bitrate provided by `bandwidth` and the second is the bitrate of * the entire process after that - decryption, transmuxing, and appending - provided * by `throughput`. * * Since the two process are serial, the overall system bandwidth is given by: * sysBandwidth = 1 / (1 / bandwidth + 1 / throughput) */ systemBandwidth: { get: function get() { var invBandwidth = 1 / (this.bandwidth || 1); var invThroughput = undefined; if (this.throughput > 0) { invThroughput = 1 / this.throughput; } else { invThroughput = 0; } var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput)); return systemBitrate; }, set: function set() { _videoJs2['default'].log.error('The "systemBandwidth" property is read-only'); } } }); Object.defineProperties(this.stats, { bandwidth: { get: function get() { return _this3.bandwidth || 0; }, enumerable: true }, mediaRequests: { get: function get() { return _this3.masterPlaylistController_.mediaRequests_() || 0; }, enumerable: true }, mediaRequestsAborted: { get: function get() { return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0; }, enumerable: true }, mediaRequestsTimedout: { get: function get() { return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0; }, enumerable: true }, mediaRequestsErrored: { get: function get() { return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0; }, enumerable: true }, mediaTransferDuration: { get: function get() { return _this3.masterPlaylistController_.mediaTransferDuration_() || 0; }, enumerable: true }, mediaBytesTransferred: { get: function get() { return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0; }, enumerable: true }, mediaSecondsLoaded: { get: function get() { return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0; }, enumerable: true } }); this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_)); this.masterPlaylistController_.on('sourceopen', function () { _this3.tech_.audioTracks().addEventListener('change', _this3.audioTrackChange_); _this3.tech_.remoteTextTracks().addEventListener('change', _this3.textTrackChange_); }); this.masterPlaylistController_.on('selectedinitialmedia', function () { // Add the manual rendition mix-in to HlsHandler (0, _renditionMixin2['default'])(_this3); }); this.masterPlaylistController_.on('audioupdate', function () { // clear current audioTracks _this3.tech_.clearTracks('audio'); _this3.masterPlaylistController_.activeAudioGroup().forEach(function (audioTrack) { _this3.tech_.audioTracks().addTrack(audioTrack); }); }); // the bandwidth of the primary segment loader is our best // estimate of overall bandwidth this.on(this.masterPlaylistController_, 'progress', function () { this.tech_.trigger('progress'); }); // In the live case, we need to ignore the very first `seeking` event since // that will be the result of the seek-to-live behavior this.on(this.masterPlaylistController_, 'firstplay', function () { this.ignoreNextSeekingEvent_ = true; }); this.tech_.ready(function () { return _this3.setupQualityLevels_(); }); // do nothing if the tech has been disposed already // this can occur if someone sets the src in player.ready(), for instance if (!this.tech_.el()) { return; } this.tech_.src(_videoJs2['default'].URL.createObjectURL(this.masterPlaylistController_.mediaSource)); } /** * Initializes the quality levels and sets listeners to update them. * * @method setupQualityLevels_ * @private */ }, { key: 'setupQualityLevels_', value: function setupQualityLevels_() { var _this4 = this; var player = _videoJs2['default'].players[this.tech_.options_.playerId]; if (player && player.qualityLevels) { this.qualityLevels_ = player.qualityLevels(); this.masterPlaylistController_.on('selectedinitialmedia', function () { handleHlsLoadedMetadata(_this4.qualityLevels_, _this4); }); this.playlists.on('mediachange', function () { handleHlsMediaChange(_this4.qualityLevels_, _this4.playlists); }); } } /** * a helper for grabbing the active audio group from MasterPlaylistController * * @private */ }, { key: 'activeAudioGroup_', value: function activeAudioGroup_() { return this.masterPlaylistController_.activeAudioGroup(); } /** * Begin playing the video. */ }, { key: 'play', value: function play() { this.masterPlaylistController_.play(); } /** * a wrapper around the function in MasterPlaylistController */ }, { key: 'setCurrentTime', value: function setCurrentTime(currentTime) { this.masterPlaylistController_.setCurrentTime(currentTime); } /** * a wrapper around the function in MasterPlaylistController */ }, { key: 'duration', value: function duration() { return this.masterPlaylistController_.duration(); } /** * a wrapper around the function in MasterPlaylistController */ }, { key: 'seekable', value: function seekable() { return this.masterPlaylistController_.seekable(); } /** * Abort all outstanding work and cleanup. */ }, { key: 'dispose', value: function dispose() { if (this.playbackWatcher_) { this.playbackWatcher_.dispose(); } if (this.masterPlaylistController_) { this.masterPlaylistController_.dispose(); } if (this.qualityLevels_) { this.qualityLevels_.dispose(); } this.tech_.audioTracks().removeEventListener('change', this.audioTrackChange_); this.tech_.remoteTextTracks().removeEventListener('change', this.textTrackChange_); _get(Object.getPrototypeOf(HlsHandler.prototype), 'dispose', this).call(this); } }]); return HlsHandler; })(Component); var HlsSourceHandler = function HlsSourceHandler(mode) { return { canHandleSource: function canHandleSource(srcObj) { // this forces video.js to skip this tech/mode if its not the one we have been // overriden to use, by returing that we cannot handle the source. if (_videoJs2['default'].options.hls && _videoJs2['default'].options.hls.mode && _videoJs2['default'].options.hls.mode !== mode) { return false; } return HlsSourceHandler.canPlayType(srcObj.type); }, handleSource: function handleSource(source, tech, options) { if (mode === 'flash') { // We need to trigger this asynchronously to give others the chance // to bind to the event when a source is set at player creation tech.setTimeout(function () { tech.trigger('loadstart'); }, 1); } var settings = _videoJs2['default'].mergeOptions(options, { hls: { mode: mode } }); tech.hls = new HlsHandler(source, tech, settings); tech.hls.xhr = (0, _xhr2['default'])(); tech.hls.src(source.src); return tech.hls; }, canPlayType: function canPlayType(type) { if (HlsSourceHandler.canPlayType(type)) { return 'maybe'; } return ''; } }; }; /** * A comparator function to sort two playlist object by bandwidth. * * @param {Object} left a media playlist object * @param {Object} right a media playlist object * @return {Number} Greater than zero if the bandwidth attribute of * left is greater than the corresponding attribute of right. Less * than zero if the bandwidth of right is greater than left and * exactly zero if the two are equal. */ Hls.comparePlaylistBandwidth = function (left, right) { var leftBandwidth = undefined; var rightBandwidth = undefined; if (left.attributes && left.attributes.BANDWIDTH) { leftBandwidth = left.attributes.BANDWIDTH; } leftBandwidth = leftBandwidth || _globalWindow2['default'].Number.MAX_VALUE; if (right.attributes && right.attributes.BANDWIDTH) { rightBandwidth = right.attributes.BANDWIDTH; } rightBandwidth = rightBandwidth || _globalWindow2['default'].Number.MAX_VALUE; return leftBandwidth - rightBandwidth; }; /** * A comparator function to sort two playlist object by resolution (width). * @param {Object} left a media playlist object * @param {Object} right a media playlist object * @return {Number} Greater than zero if the resolution.width attribute of * left is greater than the corresponding attribute of right. Less * than zero if the resolution.width of right is greater than left and * exactly zero if the two are equal. */ Hls.comparePlaylistResolution = function (left, right) { var leftWidth = undefined; var rightWidth = undefined; if (left.attributes && left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) { leftWidth = left.attributes.RESOLUTION.width; } leftWidth = leftWidth || _globalWindow2['default'].Number.MAX_VALUE; if (right.attributes && right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) { rightWidth = right.attributes.RESOLUTION.width; } rightWidth = rightWidth || _globalWindow2['default'].Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions // have the same media dimensions/ resolution if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) { return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH; } return leftWidth - rightWidth; }; HlsSourceHandler.canPlayType = function (type) { // No support for IE 10 or below if (_videoJs2['default'].browser.IE_VERSION && _videoJs2['default'].browser.IE_VERSION <= 10) { return false; } var mpegurlRE = /^(audio|video|application)\/(x-|vnd\.apple\.)?mpegurl/i; // favor native HLS support if it's available if (!_videoJs2['default'].options.hls.overrideNative && Hls.supportsNativeHls) { return false; } return mpegurlRE.test(type); }; if (typeof _videoJs2['default'].MediaSource === 'undefined' || typeof _videoJs2['default'].URL === 'undefined') { _videoJs2['default'].MediaSource = _videojsContribMediaSources.MediaSource; _videoJs2['default'].URL = _videojsContribMediaSources.URL; } var flashTech = _videoJs2['default'].getTech('Flash'); // register source handlers with the appropriate techs if (_videojsContribMediaSources.MediaSource.supportsNativeMediaSources()) { _videoJs2['default'].getTech('Html5').registerSourceHandler(HlsSourceHandler('html5'), 0); } if (_globalWindow2['default'].Uint8Array && flashTech) { flashTech.registerSourceHandler(HlsSourceHandler('flash')); } _videoJs2['default'].HlsHandler = HlsHandler; _videoJs2['default'].HlsSourceHandler = HlsSourceHandler; _videoJs2['default'].Hls = Hls; if (!_videoJs2['default'].use) { _videoJs2['default'].registerComponent('Hls', Hls); } _videoJs2['default'].m3u8 = _m3u8Parser2['default']; _videoJs2['default'].options.hls = _videoJs2['default'].options.hls || {}; if (_videoJs2['default'].registerPlugin) { _videoJs2['default'].registerPlugin('reloadSourceOnError', _reloadSourceOnError2['default']); } else { _videoJs2['default'].plugin('reloadSourceOnError', _reloadSourceOnError2['default']); } module.exports = { Hls: Hls, HlsHandler: HlsHandler, HlsSourceHandler: HlsSourceHandler }; }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) },{"./bin-utils":2,"./config":3,"./master-playlist-controller":5,"./playback-watcher":7,"./playlist":9,"./playlist-loader":8,"./reload-source-on-error":11,"./rendition-mixin":12,"./xhr":19,"aes-decrypter":23,"global/document":29,"global/window":30,"m3u8-parser":31,"videojs-contrib-media-sources":73}]},{},[76])(76) });