dashjs
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A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
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<!DOCTYPE html><html lang="en" style="font-size:16px"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><link rel="icon" href="https://dashif.org/img/favicon.ico"><link type="text/css" rel="stylesheet" href="jsdoc-custom.css"><title>Source: streaming/Stream.js</title><!--[if lt IE 9]>
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href="MediaPlayerEvents.html#event:BUFFER_LEVEL_UPDATED">BUFFER_LEVEL_UPDATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:BUFFER_LOADED">BUFFER_LOADED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CAN_PLAY">CAN_PLAY</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CAN_PLAY_THROUGH">CAN_PLAY_THROUGH</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CAPTION_CONTAINER_RESIZE">CAPTION_CONTAINER_RESIZE</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CAPTION_RENDERED">CAPTION_RENDERED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CONFORMANCE_VIOLATION">CONFORMANCE_VIOLATION</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CONTENT_STEERING_REQUEST_COMPLETED">CONTENT_STEERING_REQUEST_COMPLETED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CUE_ENTER">CUE_ENTER</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:CUE_ENTER">CUE_ENTER</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:DVB_FONT_DOWNLOAD_ADDED">DVB_FONT_DOWNLOAD_ADDED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:DVB_FONT_DOWNLOAD_COMPLETE">DVB_FONT_DOWNLOAD_COMPLETE</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:DVB_FONT_DOWNLOAD_FAILED">DVB_FONT_DOWNLOAD_FAILED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:DYNAMIC_TO_STATIC">DYNAMIC_TO_STATIC</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:ERROR">ERROR</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:EVENT_MODE_ON_RECEIVE">EVENT_MODE_ON_RECEIVE</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:EVENT_MODE_ON_START">EVENT_MODE_ON_START</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:FRAGMENT_LOADING_ABANDONED">FRAGMENT_LOADING_ABANDONED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:FRAGMENT_LOADING_COMPLETED">FRAGMENT_LOADING_COMPLETED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:FRAGMENT_LOADING_PROGRESS">FRAGMENT_LOADING_PROGRESS</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:FRAGMENT_LOADING_STARTED">FRAGMENT_LOADING_STARTED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:INBAND_PRFT">INBAND_PRFT</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:LOG">LOG</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:MANIFEST_LOADED">MANIFEST_LOADED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:MANIFEST_LOADING_FINISHED">MANIFEST_LOADING_FINISHED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:MANIFEST_LOADING_STARTED">MANIFEST_LOADING_STARTED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:MANIFEST_VALIDITY_CHANGED">MANIFEST_VALIDITY_CHANGED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:METRIC_ADDED">METRIC_ADDED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:METRIC_CHANGED">METRIC_CHANGED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:METRIC_UPDATED">METRIC_UPDATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:METRICS_CHANGED">METRICS_CHANGED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PERIOD_SWITCH_COMPLETED">PERIOD_SWITCH_COMPLETED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PERIOD_SWITCH_STARTED">PERIOD_SWITCH_STARTED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_ENDED">PLAYBACK_ENDED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_ERROR">PLAYBACK_ERROR</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_LOADED_DATA">PLAYBACK_LOADED_DATA</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_METADATA_LOADED">PLAYBACK_METADATA_LOADED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_NOT_ALLOWED">PLAYBACK_NOT_ALLOWED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_PAUSED">PLAYBACK_PAUSED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_PLAYING">PLAYBACK_PLAYING</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_PROGRESS">PLAYBACK_PROGRESS</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_RATE_CHANGED">PLAYBACK_RATE_CHANGED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_SEEKED">PLAYBACK_SEEKED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_SEEKING">PLAYBACK_SEEKING</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_STALLED">PLAYBACK_STALLED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_STARTED">PLAYBACK_STARTED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_TIME_UPDATED">PLAYBACK_TIME_UPDATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_VOLUME_CHANGED">PLAYBACK_VOLUME_CHANGED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:PLAYBACK_WAITING">PLAYBACK_WAITING</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:QUALITY_CHANGE_RENDERED">QUALITY_CHANGE_RENDERED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:QUALITY_CHANGE_REQUESTED">QUALITY_CHANGE_REQUESTED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:REPRESENTATION_SWITCH">REPRESENTATION_SWITCH</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:STREAM_ACTIVATED">STREAM_ACTIVATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:STREAM_DEACTIVATED">STREAM_DEACTIVATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:STREAM_INITIALIZED">STREAM_INITIALIZED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:STREAM_INITIALIZING">STREAM_INITIALIZING</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:STREAM_TEARDOWN_COMPLETE">STREAM_TEARDOWN_COMPLETE</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:STREAM_UPDATED">STREAM_UPDATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:TEXT_TRACK_ADDED">TEXT_TRACK_ADDED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:TEXT_TRACKS_ADDED">TEXT_TRACKS_ADDED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:THROUGHPUT_MEASUREMENT_STORED">THROUGHPUT_MEASUREMENT_STORED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:TRACK_CHANGE_RENDERED">TRACK_CHANGE_RENDERED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:TTML_PARSED">TTML_PARSED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:TTML_TO_PARSE">TTML_TO_PARSE</a></div><div class="sidebar-section-children"><a href="MetricsReportingEvents.html#event:CMCD_DATA_GENERATED">CMCD_DATA_GENERATED</a></div><div class="sidebar-section-children"><a href="OfflineEvents.html#event:OFFLINE_RECORD_FINISHED">OFFLINE_RECORD_FINISHED</a></div><div class="sidebar-section-children"><a href="OfflineEvents.html#event:OFFLINE_RECORD_LOADEDMETADATA">OFFLINE_RECORD_LOADEDMETADATA</a></div><div class="sidebar-section-children"><a href="OfflineEvents.html#event:OFFLINE_RECORD_STARTED">OFFLINE_RECORD_STARTED</a></div><div class="sidebar-section-children"><a href="OfflineEvents.html#event:OFFLINE_RECORD_STOPPED">OFFLINE_RECORD_STOPPED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_ADDED">KEY_ADDED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_ERROR">KEY_ERROR</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_MESSAGE">KEY_MESSAGE</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_SESSION_CLOSED">KEY_SESSION_CLOSED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_SESSION_CREATED">KEY_SESSION_CREATED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_SESSION_REMOVED">KEY_SESSION_REMOVED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_STATUSES_CHANGED">KEY_STATUSES_CHANGED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_SYSTEM_ACCESS_COMPLETE">KEY_SYSTEM_ACCESS_COMPLETE</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:KEY_SYSTEM_SELECTED">KEY_SYSTEM_SELECTED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:LICENSE_REQUEST_COMPLETE">LICENSE_REQUEST_COMPLETE</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:LICENSE_REQUEST_SENDING">LICENSE_REQUEST_SENDING</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:PROTECTION_CREATED">PROTECTION_CREATED</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html#event:PROTECTION_DESTROYED">PROTECTION_DESTROYED</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-global"><div>Global</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="global.html#LICENSE_SERVER_MANIFEST_CONFIGURATIONS">LICENSE_SERVER_MANIFEST_CONFIGURATIONS</a></div><div class="sidebar-section-children"><a href="global.html#MediaType">MediaType</a></div></div></div></div></div><div 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class="has-anchor">streaming_Stream.js</h1></header><article><pre class="prettyprint source lang-js"><code>/**
* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and contributor
* rights, including patent rights, and no such rights are granted under this license.
*
* Copyright (c) 2013, Dash Industry Forum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Dash Industry Forum nor the names of its
* contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 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 THE COPYRIGHT HOLDER 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.
*/
import Constants from './constants/Constants';
import DashConstants from '../dash/constants/DashConstants';
import StreamProcessor from './StreamProcessor';
import FragmentController from './controllers/FragmentController';
import ThumbnailController from './thumbnail/ThumbnailController';
import EventBus from '../core/EventBus';
import Events from '../core/events/Events';
import Debug from '../core/Debug';
import Errors from '../core/errors/Errors';
import FactoryMaker from '../core/FactoryMaker';
import DashJSError from './vo/DashJSError';
import BoxParser from './utils/BoxParser';
import URLUtils from './utils/URLUtils';
import BlacklistController from './controllers/BlacklistController';
const MEDIA_TYPES = [Constants.VIDEO, Constants.AUDIO, Constants.TEXT, Constants.MUXED, Constants.IMAGE];
function Stream(config) {
config = config || {};
const context = this.context;
const eventBus = EventBus(context).getInstance();
const urlUtils = URLUtils(context).getInstance();
const manifestModel = config.manifestModel;
const mediaPlayerModel = config.mediaPlayerModel;
const dashMetrics = config.dashMetrics;
const manifestUpdater = config.manifestUpdater;
const adapter = config.adapter;
const timelineConverter = config.timelineConverter;
const capabilities = config.capabilities;
const errHandler = config.errHandler;
const abrController = config.abrController;
const playbackController = config.playbackController;
const eventController = config.eventController;
const mediaController = config.mediaController;
const protectionController = config.protectionController;
const textController = config.textController;
const videoModel = config.videoModel;
let streamInfo = config.streamInfo;
const settings = config.settings;
let instance,
logger,
streamProcessors,
isInitialized,
isActive,
hasFinishedBuffering,
hasVideoTrack,
hasAudioTrack,
updateError,
isUpdating,
fragmentController,
thumbnailController,
segmentBlacklistController,
preloaded,
boxParser,
debug,
isEndedEventSignaled,
trackChangedEvents;
/**
* Setup the stream
*/
function setup() {
try {
debug = Debug(context).getInstance();
logger = debug.getLogger(instance);
resetInitialSettings();
boxParser = BoxParser(context).getInstance();
segmentBlacklistController = BlacklistController(context).create({
updateEventName: Events.SEGMENT_LOCATION_BLACKLIST_CHANGED,
addBlacklistEventName: Events.SEGMENT_LOCATION_BLACKLIST_ADD
});
fragmentController = FragmentController(context).create({
streamInfo: streamInfo,
mediaPlayerModel: mediaPlayerModel,
dashMetrics: dashMetrics,
errHandler: errHandler,
settings: settings,
boxParser: boxParser,
dashConstants: DashConstants,
urlUtils: urlUtils
});
} catch (e) {
throw e;
}
}
/**
* Initialize the events
*/
function initialize() {
registerEvents();
registerProtectionEvents();
textController.initializeForStream(streamInfo);
eventBus.trigger(Events.STREAM_UPDATED, { streamInfo: streamInfo });
}
/**
* Register the streaming events
*/
function registerEvents() {
eventBus.on(Events.BUFFERING_COMPLETED, onBufferingCompleted, instance);
eventBus.on(Events.DATA_UPDATE_COMPLETED, onDataUpdateCompleted, instance);
eventBus.on(Events.INBAND_EVENTS, onInbandEvents, instance);
}
/**
* Unregister the streaming events
*/
function unRegisterEvents() {
eventBus.off(Events.DATA_UPDATE_COMPLETED, onDataUpdateCompleted, instance);
eventBus.off(Events.BUFFERING_COMPLETED, onBufferingCompleted, instance);
eventBus.off(Events.INBAND_EVENTS, onInbandEvents, instance);
}
/**
* Register the protection events
*/
function registerProtectionEvents() {
if (protectionController) {
eventBus.on(Events.KEY_ERROR, onProtectionError, instance);
eventBus.on(Events.SERVER_CERTIFICATE_UPDATED, onProtectionError, instance);
eventBus.on(Events.LICENSE_REQUEST_COMPLETE, onProtectionError, instance);
eventBus.on(Events.KEY_SYSTEM_SELECTED, onProtectionError, instance);
eventBus.on(Events.KEY_SESSION_CREATED, onProtectionError, instance);
eventBus.on(Events.KEY_STATUSES_CHANGED, onProtectionError, instance);
}
}
/**
* Unregister the protection events
*/
function unRegisterProtectionEvents() {
if (protectionController) {
eventBus.off(Events.KEY_ERROR, onProtectionError, instance);
eventBus.off(Events.SERVER_CERTIFICATE_UPDATED, onProtectionError, instance);
eventBus.off(Events.LICENSE_REQUEST_COMPLETE, onProtectionError, instance);
eventBus.off(Events.KEY_SYSTEM_SELECTED, onProtectionError, instance);
eventBus.off(Events.KEY_SESSION_CREATED, onProtectionError, instance);
eventBus.off(Events.KEY_STATUSES_CHANGED, onProtectionError, instance);
}
}
/**
* Returns the stream id
* @return {*|null}
*/
function getStreamId() {
return streamInfo ? streamInfo.id : null;
}
/**
* Activates Stream by re-initializing some of its components
* @param {MediaSource} mediaSource
* @param {array} previousBufferSinks
* @memberof Stream#
*/
function activate(mediaSource, previousBufferSinks) {
return new Promise((resolve, reject) => {
if (isActive) {
resolve(previousBufferSinks);
return;
}
if (getPreloaded()) {
isActive = true;
eventBus.trigger(Events.STREAM_ACTIVATED, {
streamInfo
});
resolve(previousBufferSinks);
return;
}
_initializeMedia(mediaSource, previousBufferSinks)
.then((bufferSinks) => {
isActive = true;
eventBus.trigger(Events.STREAM_ACTIVATED, {
streamInfo
});
resolve(bufferSinks);
})
.catch((e) => {
reject(e);
});
});
}
function startPreloading(mediaSource, previousBuffers) {
return new Promise((resolve, reject) => {
if (getPreloaded()) {
reject();
return;
}
logger.info(`[startPreloading] Preloading next stream with id ${getId()}`);
setPreloaded(true);
_commonMediaInitialization(mediaSource, previousBuffers)
.then(() => {
for (let i = 0; i < streamProcessors.length && streamProcessors[i]; i++) {
streamProcessors[i].setExplicitBufferingTime(getStartTime());
streamProcessors[i].getScheduleController().startScheduleTimer();
}
resolve();
})
.catch(() => {
setPreloaded(false);
reject();
});
});
}
/**
*
* @param {object} mediaSource
* @param {array} previousBufferSinks
* @return {Promise<Array>}
* @private
*/
function _initializeMedia(mediaSource, previousBufferSinks) {
return _commonMediaInitialization(mediaSource, previousBufferSinks);
}
/**
*
* @param {object} mediaSource
* @param {array} previousBufferSinks
* @return {Promise<array>}
* @private
*/
function _commonMediaInitialization(mediaSource, previousBufferSinks) {
return new Promise((resolve, reject) => {
checkConfig();
isUpdating = true;
_addInlineEvents();
let element = videoModel.getElement();
const promises = [];
MEDIA_TYPES.forEach((mediaType) => {
// If we are preloading without a video element we can not start texttrack handling.
if (!(mediaType === Constants.TEXT && !mediaSource) && (mediaType !== Constants.VIDEO || (!element || (element && (/^VIDEO$/i).test(element.nodeName))))) {
promises.push(_initializeMediaForType(mediaType, mediaSource));
}
});
Promise.all(promises)
.then(() => {
return _createBufferSinks(previousBufferSinks)
})
.then((bufferSinks) => {
isUpdating = false;
if (streamProcessors.length === 0) {
const msg = 'No streams to play.';
errHandler.error(new DashJSError(Errors.MANIFEST_ERROR_ID_NOSTREAMS_CODE, msg, manifestModel.getValue()));
logger.fatal(msg);
} else {
_checkIfInitializationCompleted();
}
if (mediaSource) {
// All mediaInfos for texttracks are added to the TextSourceBuffer by now. We can start creating the tracks
textController.createTracks(streamInfo);
}
resolve(bufferSinks);
})
.catch((e) => {
reject(e);
});
});
}
/**
* We call this function if segments have been preloaded without a video element. Once the video element is attached MSE is available
* @param mediaSource
* @returns {Promise<unknown>}
*/
function initializeForTextWithMediaSource(mediaSource) {
return new Promise((resolve, reject) => {
_initializeMediaForType(Constants.TEXT, mediaSource)
.then(() => {
return createBufferSinkForText()
})
.then(() => {
textController.createTracks(streamInfo);
resolve()
})
.catch((e) => {
reject(e);
})
})
}
/**
* Initialize for a given media type. Creates a corresponding StreamProcessor
* @param {string} type
* @param {object} mediaSource
* @private
*/
function _initializeMediaForType(type, mediaSource) {
let allMediaForType = adapter.getAllMediaInfoForType(streamInfo, type);
let embeddedMediaInfos = [];
let mediaInfo = null;
let initialMediaInfo;
if (!allMediaForType || allMediaForType.length === 0) {
logger.info('No ' + type + ' data.');
return Promise.resolve();
}
if (type === Constants.VIDEO) {
hasVideoTrack = true;
}
if (type === Constants.AUDIO) {
hasAudioTrack = true;
}
for (let i = 0, ln = allMediaForType.length; i < ln; i++) {
mediaInfo = allMediaForType[i];
if (type === Constants.TEXT && !!mediaInfo.isEmbedded) {
textController.addEmbeddedTrack(streamInfo, mediaInfo);
embeddedMediaInfos.push(mediaInfo);
}
if (_isMediaSupported(mediaInfo)) {
mediaController.addTrack(mediaInfo);
}
}
if (embeddedMediaInfos.length > 0) {
mediaController.setInitialMediaSettingsForType(type, streamInfo);
textController.addMediaInfosToBuffer(streamInfo, type, embeddedMediaInfos);
}
// Filter out embedded text track before creating StreamProcessor
allMediaForType = allMediaForType.filter(mediaInfo => {
return !mediaInfo.isEmbedded;
});
if (allMediaForType.length === 0) {
return Promise.resolve();
}
if (type === Constants.IMAGE) {
thumbnailController = ThumbnailController(context).create({
streamInfo: streamInfo,
adapter: adapter,
baseURLController: config.baseURLController,
timelineConverter: config.timelineConverter,
debug: debug,
eventBus: eventBus,
events: Events,
dashConstants: DashConstants,
dashMetrics: config.dashMetrics,
segmentBaseController: config.segmentBaseController
});
thumbnailController.initialize();
return Promise.resolve();
}
eventBus.trigger(Events.STREAM_INITIALIZING, {
streamInfo: streamInfo,
mediaInfo: mediaInfo
});
mediaController.setInitialMediaSettingsForType(type, streamInfo);
let streamProcessor = _createStreamProcessor(allMediaForType, mediaSource);
initialMediaInfo = mediaController.getCurrentTrackFor(type, streamInfo.id);
if (initialMediaInfo) {
abrController.updateTopQualityIndex(initialMediaInfo);
// In case of mixed fragmented and embedded text tracks, check if initial selected text track is not an embedded track
return streamProcessor.selectMediaInfo((type !== Constants.TEXT || !initialMediaInfo.isEmbedded) ? initialMediaInfo : allMediaForType[0]);
}
return Promise.resolve();
}
function _isMediaSupported(mediaInfo) {
const type = mediaInfo ? mediaInfo.type : null;
let msg;
if (type === Constants.MUXED) {
msg = 'Multiplexed representations are intentionally not supported, as they are not compliant with the DASH-AVC/264 guidelines';
logger.fatal(msg);
errHandler.error(new DashJSError(Errors.MANIFEST_ERROR_ID_MULTIPLEXED_CODE, msg, manifestModel.getValue()));
return false;
}
if (type === Constants.TEXT || type === Constants.IMAGE) {
return true;
}
if (!!mediaInfo.contentProtection && !capabilities.supportsEncryptedMedia()) {
errHandler.error(new DashJSError(Errors.CAPABILITY_MEDIAKEYS_ERROR_CODE, Errors.CAPABILITY_MEDIAKEYS_ERROR_MESSAGE));
return false;
}
return true;
}
/**
* Creates the StreamProcessor for a given media type.
* @param {array} allMediaForType
* @param {object} mediaSource
* @private
*/
function _createStreamProcessor(allMediaForType, mediaSource) {
const mediaInfo = (allMediaForType && allMediaForType.length > 0) ? allMediaForType[0] : null;
let fragmentModel = fragmentController.getModel(mediaInfo ? mediaInfo.type : null);
const type = mediaInfo ? mediaInfo.type : null;
const mimeType = mediaInfo ? mediaInfo.mimeType : null;
const isFragmented = mediaInfo ? mediaInfo.isFragmented : null;
let streamProcessor = StreamProcessor(context).create({
streamInfo,
type,
mimeType,
timelineConverter,
adapter,
manifestModel,
mediaPlayerModel,
fragmentModel,
dashMetrics: config.dashMetrics,
baseURLController: config.baseURLController,
segmentBaseController: config.segmentBaseController,
abrController,
playbackController,
mediaController,
textController,
errHandler,
settings,
boxParser,
segmentBlacklistController
});
streamProcessor.initialize(mediaSource, hasVideoTrack, isFragmented);
streamProcessors.push(streamProcessor);
for (let i = 0; i < allMediaForType.length; i++) {
streamProcessor.addMediaInfo(allMediaForType[i]);
}
if (type === Constants.TEXT) {
textController.addMediaInfosToBuffer(streamInfo, type, allMediaForType, fragmentModel);
}
return streamProcessor;
}
/**
* Creates the SourceBufferSink objects for all StreamProcessors
* @param {array} previousBuffersSinks
* @return {Promise<object>}
* @private
*/
function _createBufferSinks(previousBuffersSinks) {
return new Promise((resolve) => {
const buffers = {};
const promises = streamProcessors.map((sp) => {
return sp.createBufferSinks(previousBuffersSinks);
});
Promise.all(promises)
.then((bufferSinks) => {
bufferSinks.forEach((sink) => {
if (sink) {
buffers[sink.getType()] = sink;
}
});
resolve(buffers);
})
.catch(() => {
resolve(buffers);
});
});
}
function createBufferSinkForText() {
const sp = _getProcessorByType(Constants.TEXT);
if (sp) {
return sp.createBufferSinks()
}
return Promise.resolve();
}
/**
* Partially resets some of the Stream elements. This function is called when preloading of streams is canceled or a stream switch occurs.
* @memberof Stream#
* @param {boolean} keepBuffers
*/
function deactivate(keepBuffers) {
let ln = streamProcessors ? streamProcessors.length : 0;
const errored = false;
for (let i = 0; i < ln; i++) {
let fragmentModel = streamProcessors[i].getFragmentModel();
fragmentModel.abortRequests();
fragmentModel.resetInitialSettings();
streamProcessors[i].reset(errored, keepBuffers);
}
if (textController) {
textController.deactivateStream(streamInfo);
}
streamProcessors = [];
isActive = false;
hasFinishedBuffering = false;
setPreloaded(false);
setIsEndedEventSignaled(false);
eventBus.trigger(Events.STREAM_DEACTIVATED, { streamInfo });
}
function getIsActive() {
return isActive;
}
function setMediaSource(mediaSource) {
return new Promise((resolve, reject) => {
const promises = [];
for (let i = 0; i < streamProcessors.length;) {
if (_isMediaSupported(streamProcessors[i].getMediaInfo())) {
promises.push(streamProcessors[i].setMediaSource(mediaSource));
i++;
} else {
streamProcessors[i].reset();
streamProcessors.splice(i, 1);
}
}
Promise.all(promises)
.then(() => {
for (let i = 0; i < streamProcessors.length; i++) {
//Adding of new tracks to a stream processor isn't guaranteed by the spec after the METADATA_LOADED state
//so do this after the buffers are created above.
streamProcessors[i].dischargePreBuffer();
}
if (streamProcessors.length === 0) {
const msg = 'No streams to play.';
errHandler.error(new DashJSError(Errors.MANIFEST_ERROR_ID_NOSTREAMS_CODE, msg + 'nostreams', manifestModel.getValue()));
logger.fatal(msg);
}
resolve();
})
.catch((e) => {
logger.error(e);
reject(e);
})
})
}
function resetInitialSettings(keepBuffers) {
deactivate(keepBuffers);
isInitialized = false;
hasVideoTrack = false;
hasAudioTrack = false;
updateError = {};
isUpdating = false;
isEndedEventSignaled = false;
trackChangedEvents = [];
}
function reset(keepBuffers) {
if (fragmentController) {
fragmentController.reset();
fragmentController = null;
}
if (abrController && streamInfo) {
abrController.clearDataForStream(streamInfo.id);
}
if (segmentBlacklistController) {
segmentBlacklistController.reset();
segmentBlacklistController = null;
}
resetInitialSettings(keepBuffers);
streamInfo = null;
unRegisterEvents();
unRegisterProtectionEvents();
}
function getDuration() {
return streamInfo ? streamInfo.duration : NaN;
}
function getIsEndedEventSignaled() {
return isEndedEventSignaled;
}
function setIsEndedEventSignaled(value) {
isEndedEventSignaled = value;
}
function getStartTime() {
return streamInfo ? streamInfo.start : NaN;
}
function getId() {
return streamInfo ? streamInfo.id : null;
}
function getStreamInfo() {
return streamInfo;
}
function getHasAudioTrack() {
return hasAudioTrack;
}
function getHasVideoTrack() {
return hasVideoTrack;
}
function getThumbnailController() {
return thumbnailController;
}
function checkConfig() {
if (!videoModel || !abrController) {
throw new Error(Constants.MISSING_CONFIG_ERROR);
}
}
/**
* @param {string} type
* @returns {Array}
* @memberof Stream#
*/
function getBitrateListFor(type) {
checkConfig();
if (type === Constants.IMAGE) {
if (!thumbnailController) {
return [];
}
return thumbnailController.getBitrateList();
}
const mediaInfo = getMediaInfo(type);
return abrController.getBitrateList(mediaInfo);
}
function onProtectionError(event) {
if (event.error) {
errHandler.error(event.error);
logger.fatal(event.error.message);
}
}
function prepareTrackChange(e) {
if (!isActive || !streamInfo) {
return;
}
hasFinishedBuffering = false;
let mediaInfo = e.newMediaInfo;
let manifest = manifestModel.getValue();
adapter.setCurrentMediaInfo(streamInfo.id, mediaInfo.type, mediaInfo);
let processor = getProcessorForMediaInfo(mediaInfo);
if (!processor) return;
let currentTime = playbackController.getTime();
logger.info('Stream - Process track changed at current time ' + currentTime);
// Applies only for MSS streams
if (manifest.refreshManifestOnSwitchTrack) {
trackChangedEvents.push(e);
if (!manifestUpdater.getIsUpdating()) {
logger.debug('Stream - Refreshing manifest for switch track');
manifestUpdater.refreshManifest();
}
} else {
processor.selectMediaInfo(mediaInfo)
.then(() => {
if (mediaInfo.type === Constants.VIDEO || mediaInfo.type === Constants.AUDIO) {
abrController.updateTopQualityIndex(mediaInfo);
}
processor.prepareTrackSwitch();
});
}
}
function prepareQualityChange(e) {
const processor = _getProcessorByType(e.mediaType);
if (processor) {
processor.prepareQualityChange(e);
}
}
function _addInlineEvents() {
if (eventController) {
const events = adapter.getEventsFor(streamInfo);
if (events && events.length > 0) {
eventController.addInlineEvents(events, streamInfo.id);
}
}
}
function _checkIfInitializationCompleted() {
const ln = streamProcessors.length;
const hasError = !!updateError.audio || !!updateError.video;
let error = hasError ? new DashJSError(Errors.DATA_UPDATE_FAILED_ERROR_CODE, Errors.DATA_UPDATE_FAILED_ERROR_MESSAGE) : null;
for (let i = 0; i < ln; i++) {
if (streamProcessors[i].isUpdating() || isUpdating) {
return;
}
}
if (protectionController) {
// Need to check if streamProcessors exists because streamProcessors
// could be cleared in case an error is detected while initializing DRM keysystem
protectionController.clearMediaInfoArray();
for (let i = 0; i < ln && streamProcessors[i]; i++) {
const type = streamProcessors[i].getType();
const mediaInfo = streamProcessors[i].getMediaInfo();
if (type === Constants.AUDIO ||
type === Constants.VIDEO ||
(type === Constants.TEXT && mediaInfo.isFragmented)) {
let mediaInfo = streamProcessors[i].getMediaInfo();
if (mediaInfo) {
protectionController.initializeForMedia(mediaInfo);
}
}
}
protectionController.handleKeySystemFromManifest();
}
if (error) {
errHandler.error(error);
} else if (!isInitialized) {
isInitialized = true;
videoModel.waitForReadyState(Constants.VIDEO_ELEMENT_READY_STATES.HAVE_METADATA, () => {
eventBus.trigger(Events.STREAM_INITIALIZED, {
streamInfo: streamInfo
});
})
}
}
function getMediaInfo(type) {
let streamProcessor = null;
for (let i = 0; i < streamProcessors.length; i++) {
streamProcessor = streamProcessors[i];
if (streamProcessor.getType() === type) {
return streamProcessor.getMediaInfo();
}
}
return null;
}
function onBufferingCompleted() {
let processors = getProcessors();
const ln = processors.length;
if (ln === 0) {
logger.warn('onBufferingCompleted - can\'t trigger STREAM_BUFFERING_COMPLETED because no streamProcessor is defined');
return;
}
// if there is at least one buffer controller that has not completed buffering yet do nothing
for (let i = 0; i < ln; i++) {
//if audio or video buffer is not buffering completed state, do not send STREAM_BUFFERING_COMPLETED
if (!processors[i].isBufferingCompleted() && (processors[i].getType() === Constants.AUDIO || processors[i].getType() === Constants.VIDEO)) {
logger.debug('onBufferingCompleted - One streamProcessor has finished but', processors[i].getType(), 'one is not buffering completed');
return;
}
}
logger.debug('onBufferingCompleted - trigger STREAM_BUFFERING_COMPLETED');
hasFinishedBuffering = true;
eventBus.trigger(Events.STREAM_BUFFERING_COMPLETED, { streamInfo: streamInfo }, { streamInfo });
}
function onDataUpdateCompleted(e) {
updateError[e.mediaType] = e.error;
_checkIfInitializationCompleted();
}
function onInbandEvents(e) {
if (eventController) {
eventController.addInbandEvents(e.events, streamInfo.id);
}
}
function getProcessorForMediaInfo(mediaInfo) {
if (!mediaInfo || !mediaInfo.type) {
return null;
}
return _getProcessorByType(mediaInfo.type);
}
function _getProcessorByType(type) {
if (!type) {
return null;
}
let