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/controllers/MediaController.js</title><!--[if lt IE 9]>
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href="module-Settings.html">Settings</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-classes"><div>Classes</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="Errors.html">Errors</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html">MediaPlayerEvents</a></div><div class="sidebar-section-children"><a href="MediaPlayerModel.html">MediaPlayerModel</a></div><div class="sidebar-section-children"><a href="MetricsReportingEvents.html">MetricsReportingEvents</a></div><div class="sidebar-section-children"><a href="MssErrors.html">MssErrors</a></div><div class="sidebar-section-children"><a href="OfflineErrors.html">OfflineErrors</a></div><div class="sidebar-section-children"><a href="OfflineEvents.html">OfflineEvents</a></div><div class="sidebar-section-children"><a href="ProtectionErrors.html">ProtectionErrors</a></div><div class="sidebar-section-children"><a href="ProtectionEvents.html">ProtectionEvents</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-events"><div>Events</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:ADAPTATION_SET_REMOVED_NO_CAPABILITIES">ADAPTATION_SET_REMOVED_NO_CAPABILITIES</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:AST_IN_FUTURE">AST_IN_FUTURE</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:BASE_URLS_UPDATED">BASE_URLS_UPDATED</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:BUFFER_EMPTY">BUFFER_EMPTY</a></div><div class="sidebar-section-children"><a href="MediaPlayerEvents.html#event:BUFFER_LEVEL_STATE_CHANGED">BUFFER_LEVEL_STATE_CHANGED</a></div><div class="sidebar-section-children"><a 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_controllers_MediaController.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 Events from '../../core/events/Events';
import EventBus from '../../core/EventBus';
import FactoryMaker from '../../core/FactoryMaker';
import Debug from '../../core/Debug';
import bcp47Normalize from 'bcp-47-normalize';
import {extendedFilter} from 'bcp-47-match';
function MediaController() {
const context = this.context;
const eventBus = EventBus(context).getInstance();
let instance,
logger,
tracks,
settings,
initialSettings,
lastSelectedTracks,
customParametersModel,
domStorage;
function setup() {
logger = Debug(context).getInstance().getLogger(instance);
reset();
}
/**
* @param {string} type
* @param {StreamInfo} streamInfo
* @memberof MediaController#
*/
function setInitialMediaSettingsForType(type, streamInfo) {
let settings = lastSelectedTracks[type] || getInitialSettings(type);
const tracksForType = getTracksFor(type, streamInfo.id);
let tracks = [];
if (!settings) {
settings = domStorage.getSavedMediaSettings(type);
if (settings) {
// If the settings are defined locally, do not take codec into account or it'll be too strict.
// eg: An audio track should not be selected by codec but merely by lang.
delete settings.codec;
}
setInitialSettings(type, settings);
}
if (!tracksForType || (tracksForType.length === 0)) return;
if (settings) {
tracks = Array.from(tracksForType);
tracks = filterTracksBySettings(tracks, matchSettingsLang, settings);
tracks = filterTracksBySettings(tracks, matchSettingsIndex, settings);
tracks = filterTracksBySettings(tracks, matchSettingsViewPoint, settings);
if (!(type === Constants.AUDIO && !!lastSelectedTracks[type])) {
tracks = filterTracksBySettings(tracks, matchSettingsRole, settings);
}
tracks = filterTracksBySettings(tracks, matchSettingsAccessibility, settings);
tracks = filterTracksBySettings(tracks, matchSettingsAudioChannelConfig, settings);
tracks = filterTracksBySettings(tracks, matchSettingsCodec, settings);
}
if (tracks.length === 0) {
setTrack(selectInitialTrack(type, tracksForType), true);
} else {
if (tracks.length > 1) {
setTrack(selectInitialTrack(type, tracks));
} else {
setTrack(tracks[0]);
}
}
}
/**
* @param {MediaInfo} track
* @memberof MediaController#
*/
function addTrack(track) {
if (!track) return;
const mediaType = track.type;
if (!_isMultiTrackSupportedByType(mediaType)) return;
let streamId = track.streamInfo.id;
if (!tracks[streamId]) {
tracks[streamId] = createTrackInfo();
}
const mediaTracks = tracks[streamId][mediaType].list;
for (let i = 0, len = mediaTracks.length; i < len; ++i) {
//track is already set.
if (isTracksEqual(mediaTracks[i], track)) {
return;
}
}
mediaTracks.push(track);
}
/**
* @param {string} type
* @param {string} streamId
* @returns {Array}
* @memberof MediaController#
*/
function getTracksFor(type, streamId) {
if (!type) return [];
if (!tracks[streamId] || !tracks[streamId][type]) return [];
return tracks[streamId][type].list;
}
/**
* @param {string} type
* @param {string} streamId
* @returns {Object|null}
* @memberof MediaController#
*/
function getCurrentTrackFor(type, streamId) {
if (!type || !tracks[streamId] || !tracks[streamId][type]) return null;
return tracks[streamId][type].current;
}
/**
* @param {MediaInfo} track
* @returns {boolean}
* @memberof MediaController#
*/
function isCurrentTrack(track) {
if (!track) {
return false;
}
const type = track.type;
const id = track.streamInfo.id;
return (tracks[id] && tracks[id][type] && isTracksEqual(tracks[id][type].current, track));
}
/**
* @param {MediaInfo} track
* @param {boolean} noSettingsSave specify if settings must be not be saved
* @memberof MediaController#
*/
function setTrack(track, noSettingsSave = false) {
if (!track || !track.streamInfo) return;
const type = track.type;
const streamInfo = track.streamInfo;
const id = streamInfo.id;
const current = getCurrentTrackFor(type, id);
if (!tracks[id] || !tracks[id][type]) return;
tracks[id][type].current = track;
if (tracks[id][type].current && ((type !== Constants.TEXT && !isTracksEqual(track, current)) || (type === Constants.TEXT && track.isFragmented))) {
eventBus.trigger(Events.CURRENT_TRACK_CHANGED, {
oldMediaInfo: current,
newMediaInfo: track,
switchMode: settings.get().streaming.trackSwitchMode[type]
}, { streamId: id });
}
if (!noSettingsSave) {
let settings = extractSettings(track);
if (!settings || !tracks[id][type].storeLastSettings) return;
if (settings.roles) {
settings.role = settings.roles[0];
delete settings.roles;
}
if (settings.accessibility) {
settings.accessibility = settings.accessibility[0];
}
if (settings.audioChannelConfiguration) {
settings.audioChannelConfiguration = settings.audioChannelConfiguration[0];
}
lastSelectedTracks[type] = settings;
domStorage.setSavedMediaSettings(type, settings);
}
}
/**
* @param {string} type
* @param {Object} value
* @memberof MediaController#
*/
function setInitialSettings(type, value) {
if (!type || !value) return;
initialSettings[type] = value;
}
/**
* @param {string} type
* @returns {Object|null}
* @memberof MediaController#
*/
function getInitialSettings(type) {
if (!type) return null;
return initialSettings[type];
}
/**
* @memberof MediaController#
*/
function saveTextSettingsDisabled() {
domStorage.setSavedMediaSettings(Constants.TEXT, null);
}
/**
* @param {string} type
* @returns {boolean}
* @memberof MediaController#
*/
function _isMultiTrackSupportedByType(type) {
return (type === Constants.AUDIO || type === Constants.VIDEO || type === Constants.TEXT || type === Constants.IMAGE);
}
/**
* @param {MediaInfo} t1 - first track to compare
* @param {MediaInfo} t2 - second track to compare
* @returns {boolean}
* @memberof MediaController#
*/
function isTracksEqual(t1, t2) {
if (!t1 && !t2) {
return true;
}
if (!t1 || !t2) {
return false;
}
const sameId = t1.id === t2.id;
const sameViewpoint = t1.viewpoint === t2.viewpoint;
const sameViewpointDescriptors = JSON.stringify(t1.viewpointsWithSchemeIdUri) === JSON.stringify(t2.viewpointsWithSchemeIdUri);
const sameLang = t1.lang === t2.lang;
const sameCodec = t1.codec === t2.codec;
const sameRoles = t1.roles.toString() === t2.roles.toString();
const sameRoleDescriptors = JSON.stringify(t1.rolesWithSchemeIdUri) === JSON.stringify(t2.rolesWithSchemeIdUri);
const sameAccessibility = t1.accessibility.toString() === t2.accessibility.toString();
const sameAccessibilityDescriptors = JSON.stringify(t1.accessibilitiesWithSchemeIdUri) === JSON.stringify(t2.accessibilitiesWithSchemeIdUri);
const sameAudioChannelConfiguration = t1.audioChannelConfiguration.toString() === t2.audioChannelConfiguration.toString();
const sameAudioChannelConfigurationDescriptors = JSON.stringify(t1.audioChannelConfigurationsWithSchemeIdUri) === JSON.stringify(t2.audioChannelConfigurationsWithSchemeIdUri);
return (sameId && sameCodec && sameViewpoint && sameViewpointDescriptors && sameLang && sameRoles && sameRoleDescriptors && sameAccessibility && sameAccessibilityDescriptors && sameAudioChannelConfiguration && sameAudioChannelConfigurationDescriptors);
}
function setConfig(config) {
if (!config) return;
if (config.domStorage) {
domStorage = config.domStorage;
}
if (config.settings) {
settings = config.settings;
}
if (config.customParametersModel) {
customParametersModel = config.customParametersModel;
}
}
/**
* @memberof MediaController#
*/
function reset() {
tracks = {};
lastSelectedTracks = {};
resetInitialSettings();
}
function extractSettings(mediaInfo) {
const settings = {
lang: mediaInfo.lang,
viewpoint: mediaInfo.viewpoint,
roles: mediaInfo.roles,
accessibility: mediaInfo.accessibility,
audioChannelConfiguration: mediaInfo.audioChannelConfiguration,
codec: mediaInfo.codec
};
let notEmpty = settings.lang || settings.viewpoint || (settings.role && settings.role.length > 0) ||
(settings.accessibility && settings.accessibility.length > 0) || (settings.audioChannelConfiguration && settings.audioChannelConfiguration.length > 0);
return notEmpty ? settings : null;
}
function filterTracksBySettings(tracks, filterFn, settings) {
let tracksAfterMatcher = [];
tracks.forEach(function (track) {
if (filterFn(settings, track)) {
tracksAfterMatcher.push(track);
}
});
if (tracksAfterMatcher.length !== 0) {
return tracksAfterMatcher;
}
return tracks;
}
function matchSettingsLang(settings, track) {
try {
return !settings.lang ||
(settings.lang instanceof RegExp) ?
(track.lang.match(settings.lang)) : track.lang !== '' ?
(extendedFilter(track.lang, bcp47Normalize(settings.lang)).length > 0) : false;
} catch (e) {
return false
}
}
function matchSettingsIndex(settings, track) {
return (settings.index === undefined) || (settings.index === null) || (track.index === settings.index);
}
function matchSettingsViewPoint(settings, track) {
return !settings.viewpoint || (settings.viewpoint === track.viewpoint);
}
function matchSettingsRole(settings, track, isTrackActive = false) {
const matchRole = !settings.role || !!track.roles.filter(function (item) {
return item === settings.role;
})[0];
return (matchRole || (track.type === Constants.AUDIO && isTrackActive));
}
function matchSettingsAccessibility(settings, track) {
let matchAccessibility;
if (!settings.accessibility) {
// if no accessibility is requested (or request is empty string),
// match only those tracks having no accessibility element present
matchAccessibility = !track.accessibility.length;
} else {
matchAccessibility = !!track.accessibility.filter(function (item) {
return item === settings.accessibility;
})[0];
}
return matchAccessibility;
}
function matchSettingsAudioChannelConfig(settings, track) {
let matchAudioChannelConfiguration = !settings.audioChannelConfiguration || !!track.audioChannelConfiguration.filter(function (item) {
return item === settings.audioChannelConfiguration;
})[0];
return matchAudioChannelConfiguration;
}
function matchSettingsCodec(settings, track) {
return !settings.codec || (settings.codec === track.codec);
}
function matchSettings(settings, track, isTrackActive = false) {
try {
let matchLang = false;
// If there is no language defined in the target settings we got a match
if (!settings.lang) {
matchLang = true;
}
// If the target language is provided as a RegExp apply match function
else if (settings.lang instanceof RegExp) {
matchLang = track.lang.match(settings.lang);
}
// If the track has a language and we can normalize the target language check if we got a match
else if (track.lang !== '') {
const normalizedSettingsLang = bcp47Normalize(settings.lang);
if (normalizedSettingsLang) {
matchLang = extendedFilter(track.lang, normalizedSettingsLang).length > 0
}
}
const matchIndex = (settings.index === undefined) || (settings.index === null) || (track.index === settings.index);
const matchViewPoint = !settings.viewpoint || (settings.viewpoint === track.viewpoint);
const matchRole = !settings.role || !!track.roles.filter(function (item) {
return item === settings.role;
})[0];
let matchAccessibility = !settings.accessibility || !!track.accessibility.filter(function (item) {
return item === settings.accessibility;
})[0];
let matchAudioChannelConfiguration = !settings.audioChannelConfiguration || !!track.audioChannelConfiguration.filter(function (item) {
return item === settings.audioChannelConfiguration;
})[0];
return (matchLang && matchIndex && matchViewPoint && (matchRole || (track.type === Constants.AUDIO && isTrackActive)) && matchAccessibility && matchAudioChannelConfiguration);
} catch (e) {
return false;
logger.error(e);
}
}
function resetInitialSettings() {
initialSettings = {
audio: null,
video: null,
text: null
};
}
function getTracksWithHighestSelectionPriority(trackArr) {
let max = 0;
let result = [];
trackArr.forEach((track) => {
if (!isNaN(track.selectionPriority)) {
// Higher max value. Reset list and add new entry
if (track.selectionPriority > max) {
max = track.selectionPriority;
result = [track];
}
// Same max value add to list
else if (track.selectionPriority === max) {
result.push(track);
}
}
})
return result;
}
function getTracksWithHighestBitrate(trackArr) {
let max = 0;
let result = [];
let tmp;
trackArr.forEach(function (track) {
tmp = Math.max.apply(Math, track.bitrateList.map(function (obj) {
return obj.bandwidth;
}));
if (tmp > max) {
max = tmp;
result = [track];
} else if (tmp === max) {
result.push(track);
}
});
return result;
}
function getTracksWithHighestEfficiency(trackArr) {
let min = Infinity;
let result = [];
let tmp;
trackArr.forEach(function (track) {
const sum = track.bitrateList.reduce(function (acc, obj) {
const resolution = Math.max(1, obj.width * obj.height);
const efficiency = obj.bandwidth / resolution;
return acc + efficiency;
}, 0);
tmp = sum / track.bitrateList.length;
if (tmp < min) {
min = tmp;
result = [track];
} else if (tmp === min) {
result.push(track);
}
});
return result;
}
function getTracksWithWidestRange(trackArr) {
let max = 0;
let result = [];
let tmp;
trackArr.forEach(function (track) {
tmp = track.representationCount;
if (tmp > max) {
max = tmp;
result = [track];
} else if (tmp === max) {
result.push(track);
}
});
return result;
}
function selectInitialTrack(type, tracks) {
if (type === Constants.TEXT) return tracks[0];
let mode = settings.get().streaming.selectionModeForInitialTrack;
let tmpArr;
const customInitialTrackSelectionFunction = customParametersModel.getCustomInitialTrackSelectionFunction();
if (customInitialTrackSelectionFunction && typeof customInitialTrackSelectionFunction === 'function') {
tmpArr = customInitialTrackSelectionFunction(tracks);
} else {
switch (mode) {
case Constants.TRACK_SELECTION_MODE_HIGHEST_SELECTION_PRIORITY:
tmpArr = _trackSelectionModeHighestSelectionPriority(tracks);
break;
case Constants.TRACK_SELECTION_MODE_HIGHEST_BITRATE:
tmpArr = _trackSelectionModeHighestBitrate(tracks);
break;
case Constants.TRACK_SELECTION_MODE_FIRST_TRACK:
tmpArr = _trackSelectionModeFirstTrack(tracks);
break;
case Constants.TRACK_SELECTION_MODE_HIGHEST_EFFICIENCY:
tmpArr = _trackSelectionModeHighestEfficiency(tracks);
break;
case Constants.TRACK_SELECTION_MODE_WIDEST_RANGE:
tmpArr = _trackSelectionModeWidestRange(tracks);
break;
default:
logger.warn(`Track selection mode ${mode} is not supported. Falling back to TRACK_SELECTION_MODE_FIRST_TRACK`);
tmpArr = _trackSelectionModeFirstTrack(tracks);
break;
}
}
return tmpArr.length > 0 ? tmpArr[0] : tracks[0];
}
function _trackSelectionModeHighestSelectionPriority(tracks) {
let tmpArr = getTracksWithHighestSelectionPriority(tracks);
if (tmpArr.length > 1) {
tmpArr = getTracksWithHighestBitrate(tmpArr);
}
if (tmpArr.length > 1) {
tmpArr = getTracksWithWidestRange(tmpArr);
}
return tmpArr;
}
function _trackSelectionModeHighestBitrate(tracks) {
let tmpArr = getTracksWithHighestBitrate(tracks);
if (tmpArr.length > 1) {
tmpArr = getTracksWithWidestRange(tmpArr);
}
return tmpArr;
}
function _trackSelectionModeFirstTrack(tracks) {
return tracks[0];
}
function _trackSelectionModeHighestEfficiency(tracks) {
let tmpArr = getTracksWithHighestEfficiency(tracks);
if (tmpArr.length > 1) {
tmpArr = getTracksWithHighestBitrate(tmpArr);
}
return tmpArr;
}
function _trackSelectionModeWidestRange(tracks) {
let tmpArr = getTracksWithWidestRange(tracks);
if (tmpArr.length > 1) {
tmpArr = getTracksWithHighestBitrate(tracks);
}
return tmpArr;
}
function createTrackInfo() {
const storeLastSettings = settings.get().streaming.saveLastMediaSettingsForCurrentStreamingSession;
return {
audio: {
list: [],
storeLastSettings,
current: null
},
video: {
list: [],
storeLastSettings,
current: null
},
text: {
list: [],
storeLastSettings,
current: null
},
image: {
list: [],
storeLastSettings,
current: null
}
};
}
instance = {
setInitialMediaSettingsForType,
addTrack,
getTracksFor,
getCurrentTrackFor,
isCurrentTrack,
setTrack,
selectInitialTrack,
setInitialSettings,
getInitialSettings,
getTracksWithHighestBitrate,
getTracksWithHighestEfficiency,
getTracksWithWidestRange,
isTracksEqual,
matchSettings,
matchSettingsLang,
matchSettingsIndex,
matchSettingsViewPoint,
matchSettingsRole,
matchSettingsAccessibility,
matchSettingsAudioChannelConfig,
saveTextSettingsDisabled,
setConfig,
reset
};
setup();
return instance;
}
MediaController.__dashjs_factory_name = 'MediaController';
const factory = FactoryMaker.getSingletonFactory(MediaController);
FactoryMaker.updateSingletonFactory(MediaController.__dashjs_factory_name, factory);
export default factory;
</code></pre></article></section></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type anything to view search result</span></div></div></div><div class="mobile-menu-icon-container"><button class="icon-button" id="mobile-menu" data-isopen="false" aria-label="menu"><svg><use xlink:href="#menu-icon"></use></svg></button></div><div id="mobile-sidebar" class="mobile-sidebar-container"><div class="mobile-sidebar-wrapper"><a href="/" class="sidebar-title sidebar-title-anchor">Home</a><div class="mobile-nav-links"></div><div 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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">LO