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* 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 DashConstants from './constants/DashConstants.js';
import MediaInfo from './vo/MediaInfo.js';
import StreamInfo from './vo/StreamInfo.js';
import ManifestInfo from './vo/ManifestInfo.js';
import Event from './vo/Event.js';
import FactoryMaker from '../core/FactoryMaker.js';
import DashManifestModel from './models/DashManifestModel.js';
import PatchManifestModel from './models/PatchManifestModel.js';
import Representation from './vo/Representation.js';
import {bcp47Normalize} from 'bcp-47-normalize';
import {getId3Frames} from '@svta/common-media-library/id3/getId3Frames.js';
import Constants from '../streaming/constants/Constants.js';
import Settings from '../core/Settings.js';
/**
* @module DashAdapter
* @description The DashAdapter module can be accessed using the MediaPlayer API getDashAdapter()
*/
function DashAdapter() {
let instance,
dashManifestModel,
patchManifestModel,
settings,
voPeriods,
constants,
cea608parser;
const context = this.context;
const PROFILE_DVB = 'urn:dvb:dash:profile:dvb-dash:2014';
function setup() {
dashManifestModel = DashManifestModel(context).getInstance();
patchManifestModel = PatchManifestModel(context).getInstance();
settings = Settings(context).getInstance();
reset();
}
// #region PUBLIC FUNCTIONS
// --------------------------------------------------
function setConfig(config) {
Iif (!config) {
return;
}
if (config.constants) {
constants = config.constants;
}
if (config.cea608parser) {
cea608parser = config.cea608parser;
}
if (config.errHandler) {
dashManifestModel.setConfig({ errHandler: config.errHandler });
}
if (config.BASE64) {
dashManifestModel.setConfig({ BASE64: config.BASE64 });
}
}
/**
* Returns a MediaInfo object for a given media type and the corresponding streamInfo.
* @param {object} streamInfo
* @param {MediaType }type
* @returns {null|MediaInfo} mediaInfo
* @memberOf module:DashAdapter
* @instance
*/
function getMediaInfoForType(streamInfo, type) {
if (voPeriods.length === 0 || !streamInfo) {
return null;
}
let selectedVoPeriod = getPeriodForStreamInfo(streamInfo, voPeriods);
if (!selectedVoPeriod) {
return null;
}
const voAdaptations = dashManifestModel.getAdaptationsForPeriod(selectedVoPeriod);
let realAdaptation = getMainAdaptationForType(type, streamInfo);
Iif (!realAdaptation) {
return null;
}
let idx = dashManifestModel.getIndexForAdaptation(realAdaptation, voPeriods[0].mpd.manifest, streamInfo.index);
return convertAdaptationToMediaInfo(voAdaptations[idx]);
}
/**
* Checks if the role of the specified AdaptationSet is set to main
* @param {object} adaptation
* @returns {boolean}
* @memberOf module:DashAdapter
* @instance
*/
function getIsMain(adaptation) {
return dashManifestModel.getRolesForAdaptation(adaptation).filter(function (role) {
return role.schemeIdUri === Constants.DASH_ROLE_SCHEME_ID && role.value === DashConstants.MAIN;
})[0];
}
/**
* Returns the AdaptationSet for a given period index and a given mediaType.
* @param {MediaType} type
* @param {object} streamInfo
* @returns {null|object} adaptation
* @memberOf module:DashAdapter
* @instance
*/
function getMainAdaptationForType(type, streamInfo) {
const index = streamInfo ? streamInfo.index : 0;
const adaptations = dashManifestModel.getAdaptationsForType(voPeriods[index].mpd.manifest, index, type);
Iif (!adaptations || adaptations.length === 0) {
return null;
}
if (adaptations.length > 1 && streamInfo) {
for (let i = 0, ln = adaptations.length; i < ln; i++) {
if (getIsMain(adaptations[i])) {
return adaptations[i];
}
}
}
return adaptations[0];
}
/**
* Compares two mediaInfo objects
* @param {MediaInfo} mInfoOne
* @param {MediaInfo} mInfoTwo
* @returns {boolean}
* @memberof module:DashAdapter
* @instance
*/
function areMediaInfosEqual(mInfoOne, mInfoTwo) {
if (!mInfoOne || !mInfoTwo) {
return false;
}
const sameId = mInfoOne.id === mInfoTwo.id;
const sameCodec = mInfoOne.codec === mInfoTwo.codec;
const sameViewpoint = JSON.stringify(mInfoOne.viewpoint) === JSON.stringify(mInfoTwo.viewpoint);
const sameLang = mInfoOne.lang === mInfoTwo.lang;
const sameRoles = JSON.stringify(mInfoOne.roles) === JSON.stringify(mInfoTwo.roles);
const sameAccessibility = JSON.stringify(mInfoOne.accessibility) === JSON.stringify(mInfoTwo.accessibility);
const sameAudioChannelConfiguration = JSON.stringify(mInfoOne.audioChannelConfiguration) === JSON.stringify(mInfoTwo.audioChannelConfiguration);
return (sameId && sameCodec && sameViewpoint && sameLang && sameRoles && sameAccessibility && sameAudioChannelConfiguration);
}
function _getAllMediaInfo(manifest, period, streamInfo, adaptations, type, embeddedText) {
let mediaArr = [];
let data,
media,
idx,
i,
j,
ln;
if (!adaptations || adaptations.length === 0) {
return [];
}
const voAdaptations = dashManifestModel.getAdaptationsForPeriod(period);
for (i = 0, ln = adaptations.length; i < ln; i++) {
data = adaptations[i];
idx = dashManifestModel.getIndexForAdaptation(data, manifest, streamInfo.index);
media = convertAdaptationToMediaInfo(voAdaptations[idx]);
if (embeddedText) {
let accessibilityLength = media.accessibility.length;
for (j = 0; j < accessibilityLength; j++) {
Iif (!media) {
continue;
}
let accessibility = media.accessibility[j];
if (accessibility.schemeIdUri === constants.ACCESSIBILITY_CEA608_SCHEME) {
Iif (!accessibility.value || accessibility.value === '') {
convertVideoInfoToEmbeddedTextInfo(media, constants.CC1, 'eng');
mediaArr.push(media);
media = null;
} else {
let value = accessibility.value;
let parts = value.split(';');
if (parts[0].substring(0, 2) === 'CC') {
for (j = 0; j < parts.length; j++) {
if (!media) {
media = convertAdaptationToMediaInfo.call(this, voAdaptations[idx]);
}
convertVideoInfoToEmbeddedTextInfo(media, parts[j].substring(0, 3), parts[j].substring(4));
mediaArr.push(media);
media = null;
}
} else E{
for (j = 0; j < parts.length; j++) { // Only languages for CC1, CC2, ...
if (!media) {
media = convertAdaptationToMediaInfo.call(this, voAdaptations[idx]);
}
convertVideoInfoToEmbeddedTextInfo(media, 'CC' + (j + 1), parts[j]);
mediaArr.push(media);
media = null;
}
}
}
}
}
} else Iif (type === constants.IMAGE) {
convertVideoInfoToThumbnailInfo(media);
mediaArr.push(media);
media = null;
} else if (media) {
mediaArr.push(media);
}
}
if (settings.get().streaming.includePreselectionsInMediainfoArray) {
const voPreselections = dashManifestModel.getPreselectionsForPeriod(period);
for (i = 0, ln = voPreselections.length; i < ln; i++) {
const preselection = voPreselections[i];
if (preselection.hasOwnProperty('type') && preselection.type === type) {
media = convertPreselectionToMediaInfo(voPreselections[i]);
if (media) {
mediaArr.push(media);
}
}
}
}
return mediaArr;
}
/**
* Returns all the mediaInfos for a given mediaType and the corresponding streamInfo.
* @param {object} streamInfo
* @param {MediaType} type
* @param {object} externalManifest Set to null or undefined if no external manifest is to be used
* @returns {Array} mediaArr
* @memberOf module:DashAdapter
* @instance
*/
function getAllMediaInfoForType(streamInfo, type, externalManifest) {
let voLocalPeriods = voPeriods;
let manifest = externalManifest;
let mediaArr = [];
if (manifest) {
checkConfig();
voLocalPeriods = getRegularPeriods(manifest);
} else {
if (voPeriods.length > 0) {
manifest = voPeriods[0].mpd.manifest;
} else {
return mediaArr;
}
}
const selectedVoPeriod = getPeriodForStreamInfo(streamInfo, voLocalPeriods);
let adaptationsForType = dashManifestModel.getAdaptationsForType(manifest, streamInfo ? streamInfo.index : null, type);
mediaArr = _getAllMediaInfo(manifest, selectedVoPeriod, streamInfo, adaptationsForType, type);
// Search for embedded text in video track
if (type === constants.TEXT) {
adaptationsForType = dashManifestModel.getAdaptationsForType(manifest, streamInfo ? streamInfo.index : null, constants.VIDEO);
mediaArr = mediaArr.concat(_getAllMediaInfo(manifest, selectedVoPeriod, streamInfo, adaptationsForType, type, true));
}
return mediaArr;
}
/**
* Update the internal voPeriods array with the information from the new manifest
* @param {object} newManifest
* @returns {*}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function updatePeriods(newManifest) {
if (!newManifest) {
return null;
}
checkConfig();
voPeriods = getRegularPeriods(newManifest);
}
/**
* Returns an array of streamInfo objects
* @param {object} externalManifest
* @param {number} maxStreamsInfo
* @returns {Array} streams
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getStreamsInfo(externalManifest, maxStreamsInfo) {
const streams = [];
let voLocalPeriods = voPeriods;
//if manifest is defined, getStreamsInfo is for an outside manifest, not the current one
if (externalManifest) {
checkConfig();
voLocalPeriods = getRegularPeriods(externalManifest);
}
if (voLocalPeriods.length > 0) {
if (!maxStreamsInfo || maxStreamsInfo > voLocalPeriods.length) {
maxStreamsInfo = voLocalPeriods.length;
}
for (let i = 0; i < maxStreamsInfo; i++) {
streams.push(convertPeriodToStreamInfo(voLocalPeriods[i]));
}
}
return streams;
}
/**
* Returns the AdaptationSet as saved in the DashManifestModel
* @param {object} streamInfo
* @param {object} mediaInfo
* @returns {object} realAdaptation
* @memberOf module:DashAdapter
* @instance
*/
function getRealAdaptation(streamInfo, mediaInfo) {
let id,
realAdaptation;
const selectedVoPeriod = getPeriodForStreamInfo(streamInfo, voPeriods);
id = mediaInfo ? mediaInfo.id : null;
Iif (voPeriods.length > 0 && selectedVoPeriod) {
realAdaptation = id ? dashManifestModel.getAdaptationForId(id, voPeriods[0].mpd.manifest, selectedVoPeriod.index) : dashManifestModel.getAdaptationForIndex(mediaInfo ? mediaInfo.index : null, voPeriods[0].mpd.manifest, selectedVoPeriod.index);
}
return realAdaptation;
}
/**
* Returns the ProducerReferenceTimes as saved in the DashManifestModel if present
* @param {object} streamInfo
* @param {object} mediaInfo
* @returns {object} producerReferenceTimes
* @memberOf module:DashAdapter
* @instance
*/
function getProducerReferenceTimes(streamInfo, mediaInfo) {
let id, realAdaptation;
const selectedVoPeriod = getPeriodForStreamInfo(streamInfo, voPeriods);
id = mediaInfo ? mediaInfo.id : null;
Iif (voPeriods.length > 0 && selectedVoPeriod) {
realAdaptation = id ? dashManifestModel.getAdaptationForId(id, voPeriods[0].mpd.manifest, selectedVoPeriod.index) : dashManifestModel.getAdaptationForIndex(mediaInfo ? mediaInfo.index : null, voPeriods[0].mpd.manifest, selectedVoPeriod.index);
}
if (!realAdaptation) {
return [];
}
return dashManifestModel.getProducerReferenceTimesForAdaptation(realAdaptation);
}
/**
* Return all EssentialProperties of an AdaptationSet, Representation or Preselection
* @param {object} element
* @return {array}
*/
function getEssentialProperties(element) {
try {
return dashManifestModel.getEssentialProperties(element);
} catch (e) {
return [];
}
}
/**
* Return supplementalCodecs of a Representation
* @param {object} representation
* @returns {array}
*/
function getSupplementalCodecs(representation) {
const supplementalCodecs = representation[DashConstants.SUPPLEMENTAL_CODECS];
if (!supplementalCodecs) {
return [];
}
return supplementalCodecs.split(' ').map((codec) => representation.mimeType + ';codecs="' + codec + '"');
}
/**
* Returns the period as defined in the DashManifestModel for a given index
* @param {number} index
* @return {object}
* @memberOf module:DashAdapter
* @instance
*/
function getRealPeriodByIndex(index) {
return dashManifestModel.getRealPeriodForIndex(index, voPeriods[0].mpd.manifest);
}
/**
* Returns all voRepresentations for a given mediaInfo
* @param {object} mediaInfo
* @returns {Array} voReps
* @memberOf module:DashAdapter
* @instance
*/
function getVoRepresentations(mediaInfo) {
let voReps;
const voAdaptation = getAdaptationForMediaInfo(mediaInfo);
voReps = dashManifestModel.getRepresentationsForAdaptation(voAdaptation, mediaInfo);
return voReps;
}
/**
* Returns the event for the given parameters.
* @param {object} eventBox
* @param {object} eventStreams
* @param {number} mediaStartTime - Specified in seconds
* @param {object} voRepresentation
* @returns {null|Event}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getEvent(eventBox, eventStreams, mediaStartTime, voRepresentation) {
try {
if (!eventBox || !eventStreams || isNaN(mediaStartTime) || !voRepresentation) {
return null;
}
const schemeIdUri = eventBox.scheme_id_uri;
const value = eventBox.value;
Iif (!eventStreams[schemeIdUri + '/' + value]) {
return null;
}
const event = new Event();
const timescale = eventBox.timescale || 1;
const periodStart = voRepresentation.adaptation.period.start;
const eventStream = eventStreams[schemeIdUri + '/' + value];
// The PTO in voRepresentation is already specified in seconds
const presentationTimeOffset = !isNaN(voRepresentation.presentationTimeOffset) ? voRepresentation.presentationTimeOffset : !isNaN(eventStream.presentationTimeOffset) ? eventStream.presentationTimeOffset : 0;
// In case of version 1 events the presentation_time is parsed as presentation_time_delta
let presentationTimeDelta = eventBox.presentation_time_delta / timescale;
let calculatedPresentationTime;
if (eventBox.version === 0) {
calculatedPresentationTime = periodStart + mediaStartTime - presentationTimeOffset + presentationTimeDelta;
} else {
calculatedPresentationTime = periodStart - presentationTimeOffset + presentationTimeDelta;
}
const duration = eventBox.event_duration / timescale;
const id = eventBox.id;
const messageData = eventBox.message_data;
event.eventStream = eventStream;
event.eventStream.value = value;
event.eventStream.timescale = timescale;
event.duration = duration;
event.id = id;
event.calculatedPresentationTime = calculatedPresentationTime;
event.messageData = messageData;
event.presentationTimeDelta = presentationTimeDelta;
event.parsedMessageData = (schemeIdUri === Constants.ID3_SCHEME_ID_URI) ? getId3Frames(messageData) : null;
return event;
} catch (e) {
return null;
}
}
/**
* Returns the events for the given info object. info can either be an instance of StreamInfo, MediaInfo or Representation
* @param {object} info
* @param {object} voRepresentation
* @returns {Array}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getEventsFor(info, voRepresentation, streamInfo) {
let events = [];
if (voPeriods.length > 0) {
const manifest = voPeriods[0].mpd.manifest;
Iif (info instanceof StreamInfo) {
const period = getPeriodForStreamInfo(info, voPeriods)
events = dashManifestModel.getEventsForPeriod(period);
} else Iif (info instanceof MediaInfo) {
const period = getPeriodForStreamInfo(streamInfo, voPeriods)
events = dashManifestModel.getEventStreamForAdaptationSet(manifest, getAdaptationForMediaInfo(info), period);
} else Iif (info instanceof Representation) {
const period = getPeriodForStreamInfo(streamInfo, voPeriods)
events = dashManifestModel.getEventStreamForRepresentation(manifest, voRepresentation, period);
}
}
return events;
}
/**
* Check if the given type is a text track
* @param {object} adaptation
* @returns {boolean}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getIsTextTrack(adaptation) {
return dashManifestModel.getIsText(adaptation);
}
/**
* Returns the UTC Timing Sources specified in the manifest
* @returns {Array} utcTimingSources
* @memberOf module:DashAdapter
* @instance
*/
function getUTCTimingSources() {
const manifest = getManifest();
return dashManifestModel.getUTCTimingSources(manifest);
}
/**
* Returns the suggestedPresentationDelay as specified in the manifest
* @returns {String} suggestedPresentationDelay
* @memberOf module:DashAdapter
* @instance
*/
function getSuggestedPresentationDelay() {
const mpd = voPeriods.length > 0 ? voPeriods[0].mpd : null;
return dashManifestModel.getSuggestedPresentationDelay(mpd);
}
/**
* Returns the availabilityStartTime as specified in the manifest
* @param {object} externalManifest Omit this value if no external manifest should be used
* @returns {number} availabilityStartTime
* @memberOf module:DashAdapter
* @instance
*/
function getAvailabilityStartTime(externalManifest) {
const mpd = getMpd(externalManifest);
return dashManifestModel.getAvailabilityStartTime(mpd);
}
/**
* Returns a boolean indicating if the manifest is dynamic or not
* @param {object} externalManifest Omit this value if no external manifest should be used
* @returns {boolean}
* @memberOf module:DashAdapter
* @instance
*/
function getIsDynamic(externalManifest) {
const manifest = getManifest(externalManifest);
return dashManifestModel.getIsDynamic(manifest);
}
/**
* Returns the duration of the MPD
* @param {object} externalManifest Omit this value if no external manifest should be used
* @returns {number} duration
* @memberOf module:DashAdapter
* @instance
*/
function getDuration(externalManifest) {
const manifest = getManifest(externalManifest);
return dashManifestModel.getDuration(manifest);
}
/**
* Returns all periods of the MPD
* @param {object} externalManifest Omit this value if no external manifest should be used
* @returns {Array} periods
* @memberOf module:DashAdapter
* @instance
*/
function getRegularPeriods(externalManifest) {
const mpd = getMpd(externalManifest);
return dashManifestModel.getRegularPeriods(mpd);
}
/**
* Returns an MPD object
* @param {object} externalManifest Omit this value if no external manifest should be used
* @returns {object} MPD
* @memberOf module:DashAdapter
* @instance
*/
function getMpd(externalManifest) {
const manifest = getManifest(externalManifest);
return dashManifestModel.getMpd(manifest);
}
/**
* Returns the ContentSteering element of the MPD
* @param {object} manifest
* @returns {object} contentSteering
* @memberOf module:DashAdapter
* @instance
*/
function getContentSteering(manifest) {
return dashManifestModel.getContentSteering(manifest);
}
/**
* Returns the location element of the MPD
* @param {object} manifest
* @returns {String} location
* @memberOf module:DashAdapter
* @instance
*/
function getLocation(manifest) {
return dashManifestModel.getLocation(manifest);
}
/**
* Returns the manifest update period used for dynamic manifests
* @param {object} manifest
* @param {number} latencyOfLastUpdate
* @returns {NaN|number} manifestUpdatePeriod
* @memberOf module:DashAdapter
* @instance
*/
function getManifestUpdatePeriod(manifest, latencyOfLastUpdate = 0) {
return dashManifestModel.getManifestUpdatePeriod(manifest, latencyOfLastUpdate);
}
/**
* Returns the publish time from the manifest
* @param {object} manifest
* @returns {Date|null} publishTime
* @memberOf module:DashAdapter
* @instance
*/
function getPublishTime(manifest) {
return dashManifestModel.getPublishTime(manifest);
}
/**
* Returns the patch locations of the MPD if existing and if they are still valid
* @param {object} manifest
* @returns {PatchLocation[]} patch location
* @memberOf module:DashAdapter
* @instance
*/
function getPatchLocation(manifest) {
const patchLocations = dashManifestModel.getPatchLocation(manifest);
const publishTime = dashManifestModel.getPublishTime(manifest);
// short-circuit when no patch location or publish time exists
if (!patchLocations || patchLocations.length === 0 || !publishTime) {
return [];
}
return patchLocations.filter((patchLocation) => {
// check if the patch location has expired, if so do not consider it
return isNaN(patchLocation.ttl) || (publishTime.getTime() + patchLocation.ttl > new Date().getTime())
})
}
/**
* Checks if the manifest has a DVB profile
* @param {object} manifest
* @returns {boolean}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getIsDVB(manifest) {
return dashManifestModel.hasProfile(manifest, PROFILE_DVB);
}
/**
* Checks if the manifest is actually just a patch manifest
* @param {object} manifest
* @return {boolean}
* @memberOf module:DashAdapter
* @instance
*/
function getIsPatch(manifest) {
return patchManifestModel.getIsPatch(manifest);
}
/**
* Returns the base urls for a given element
* @param {object} node
* @returns {BaseURL[]}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getBaseURLsFromElement(node) {
return dashManifestModel.getBaseURLsFromElement(node);
}
/**
* Returns the function to sort the Representations
* @returns {function}
* @memberOf module:DashAdapter
* @instance
* @ignore
*/
function getRepresentationSortFunction() {
return dashManifestModel.getRepresentationSortFunction();
}
/**
* Returns the codec for a given adaptation set and a given representation id.
* @param {object} adaptation
* @param {number} representationId
* @param {boolean} addResolutionInfo Defines whether to include resolution information in the output
* @returns {String} codec
* @memberOf module:DashAdapter
* @instance
*/
function getCodec(adaptation, representationIndex, addResolutionInfo) {
return dashManifestModel.getCodec(adaptation, representationIndex, addResolutionInfo);
}
/**
* Returns the codec for a given adaptation set and a given representation id.
* @param {object} preselection
* @param {object} adaptations
* @returns {String} codec
* @memberOf module:DashAdapter
* @instance
*/
function getCodecForPreselection(preselection, adaptations) {
return dashManifestModel.getCodecForPreselection(preselection, adaptations);
}
/**
* Returns the framerate of a Representation as number
* @param representation
* @returns {number}
*/
function getFramerate(representation) {
return dashManifestModel.getFramerate(representation);
}
/**
* Returns the bandwidth for a given representation id and the corresponding period index
* @param {number} representationId
* @param {number} periodIdx
* @returns {number} bandwidth
* @memberOf module:DashAdapter
* @instance
*/
function getBandwidthForRepresentation(representationId, periodIdx) {
let representation;
let period = getPeriod(periodIdx);
representation = findRepresentation(period, representationId);
return representation ? representation.bandwidth : null;
}
/**
* Returns the index for a given representation id
* @param {string} representationId
* @param {number} periodIdx
* @returns {number} index
* @memberOf module:DashAdapter
* @instance
*/
function getIndexForRepresentation(representationId, periodIdx) {
let period = getPeriod(periodIdx);
return findRepresentationIndex(period, representationId);
}
/**
* Returns the voPeriod object for a given id
* @param {String} id
* @returns {object|null}
* @memberOf module:DashAdapter
* @instance
*/
function getPeriodById(id) {
if (!id || voPeriods.length === 0) {
return null;
}
const periods = voPeriods.filter((p) => {
return p.id === id;
});
if (periods && periods.length > 0) {
return periods[0];
}
return null;
}
/**
* Checks if the given AdaptationSet is from the given media type
* @param {object} adaptation
* @param {string} type
* @return {boolean}
* @memberOf module:DashAdapter
* @instance
*/
function getIsTypeOf(adaptation, type) {
return dashManifestModel.getIsTypeOf(adaptation, type);
}
function reset() {
voPeriods = [];
}
/**
* Checks if the given Preselection is from the given media type
* @param {object} preselection
* @param {array} adaptations
* @param {string} type
* @return {boolean}
* @memberOf module:DashAdapter
* @instance
*/
function getPreselectionIsTypeOf(preselection, adaptations, type) {
return dashManifestModel.getPreselectionIsTypeOf(preselection, adaptations, type);
}
/**
* returns the main AdaptationSet of a given Preselection
* @param {object} preselection
* @param {array} adaptations
* @return {object}
* @memberOf module:DashAdapter
* @instance
*/
function getMainAdaptationSetForPreselection(preselection, adaptations) {
return dashManifestModel.getMainAdaptationSetForPreselection(preselection, adaptations);
}
/**
* returns common properties in form of a Representation of a given Preselection
* @param {object} preselection
* @param {array} adaptations
* @return {object}
* @memberOf module:DashAdapter
* @instance
*/
function getCommonRepresentationForPreselection(preselection, adaptations) {
return dashManifestModel.getCommonRepresentationForPreselection(preselection, adaptations);
}
/**
* Checks if the supplied manifest is compatible for application of the supplied patch
* @param {object} manifest
* @param {object} patch
* @return {boolean}
* @memberOf module:DashAdapter
* @instance
*/
function isPatchValid(manifest, patch) {
let manifestId = dashManifestModel.getId(manifest);
let patchManifestId = patchManifestModel.getMpdId(patch);
let manifestPublishTime = dashManifestModel.getPublishTime(manifest);
let patchPublishTime = patchManifestModel.getPublishTime(patch);
let originalManifestPublishTime = patchManifestModel.getOriginalPublishTime(patch);
// Patches are considered compatible if the following are true
// - MPD@id == Patch@mpdId
// - MPD@publishTime == Patch@originalPublishTime
// - MPD@publishTime < Patch@publishTime
// - All values in comparison exist
return !!(manifestId && patchManifestId && (manifestId == patchManifestId) &&
manifestPublishTime && originalManifestPublishTime && (manifestPublishTime.getTime() == originalManifestPublishTime.getTime()) &&
patchPublishTime && (manifestPublishTime.getTime() < patchPublishTime.getTime()));
}
/**
* Takes a given patch and applies it to the provided manifest, assumes patch is valid for manifest
* @param {object} manifest
* @param {object} patch
* @memberOf module:DashAdapter
* @instance
*/
function applyPatchToManifest(manifest, patch) {
// get all operations from the patch and apply them in document order
patchManifestModel.getPatchOperations(patch)
.forEach((operation) => {
let result = operation.getMpdTarget(manifest);
// operation supplies a path that doesn't match mpd, skip
if (result === null) {
return;
}
let { name, target, leaf } = result;
// short circuit for attribute selectors and text replacement
if (operation.xpath.findsAttribute() || name === '__text') {
switch (operation.action) {
case 'add':
case 'replace':
// add and replace are just setting the value
target[name] = operation.value;
break;
case 'remove':
// remove is deleting the value
delete target[name];
break;
}
return;
}
// determine the relative insert position prior to possible removal
let relativePosition = (target[name] || []).indexOf(leaf);
let insertBefore = (operation.position === 'prepend' || operation.position === 'before');
// perform removal operation first, we have already capture the appropriate relative position
if (operation.action === 'remove' || operation.action === 'replace') {
// note that we ignore the 'ws' attribute of patch operations as it does not effect parsed mpd operations
// purge the directly named entity
Iif (!Array.isArray(target[name])) {
delete target[name];
} else if (relativePosition != -1) {
// if we did have a positional reference we need to purge from array set and restore X2JS proper semantics
let targetArray = target[name];
targetArray.splice(relativePosition, 1);
if (targetArray.length > 0) {
target[name] = targetArray;
} else {
// all nodes of this type deleted, remove entry
delete target[name];
}
}
}
// Perform any add/replace operations now, technically RFC5261 only allows a single element to take the
// place of a replaced element while the add case allows an arbitrary number of children.
// Due to the both operations requiring the same insertion logic they have been combined here and we will
// not enforce single child operations for replace, assertions should be made at patch parse time if necessary
if (operation.action === 'add' || operation.action === 'replace') {
// value will be an object with element name keys pointing to arrays of objects
Object.keys(operation.value).forEach((insert) => {
let insertNodes = operation.value[insert];
let updatedNodes = target[insert] || [];
Iif (updatedNodes.length === 0 && target[insert]) {
updatedNodes.push(target[insert]);
}
if (updatedNodes.length === 0) {
// no original nodes for this element type
updatedNodes = insertNodes;
} else {
// compute the position we need to insert at, default to end of set
let position = updatedNodes.length;
if (insert == name && relativePosition != -1) {
// if the inserted element matches the operation target (not leaf) and there is a relative position we
// want the inserted position to be set such that our insertion is relative to original position
// since replace has modified the array length we reduce the insert point by 1
position = relativePosition + (insertBefore ? 0 : 1) + (operation.action === 'replace' ? -1 : 0);
} else {
// otherwise we are in an add append/prepend case or replace case that removed the target name completely
position = insertBefore ? 0 : updatedNodes.length;
}
// we dont have to perform element removal for the replace case as that was done above
updatedNodes.splice.apply(updatedNodes, [position, 0].concat(insertNodes));
}
// now we properly reset the element keys on the target to match parsing semantics
target[insert] = updatedNodes;
});
}
});
}
// #endregion PUBLIC FUNCTIONS
// #region PRIVATE FUNCTIONS
// --------------------------------------------------
function getManifest(externalManifest) {
return externalManifest ? externalManifest : voPeriods.length > 0 ? voPeriods[0].mpd.manifest : null;
}
function getAdaptationForMediaInfo(mediaInfo) {
try {
const selectedVoPeriod = getPeriodForStreamInfo(mediaInfo.streamInfo, voPeriods);
const voAdaptations = dashManifestModel.getAdaptationsForPeriod(selectedVoPeriod);
if (!mediaInfo || !mediaInfo.streamInfo || mediaInfo.streamInfo.id === undefined || !voAdaptations) {
return null;
}
return voAdaptations[mediaInfo.index];
} catch (e) {
return null;
}
}
function getPeriodForStreamInfo(streamInfo, voPeriodsArray) {
const ln = voPeriodsArray.length;
for (let i = 0; i < ln; i++) {
let voPeriod = voPeriodsArray[i];
if (streamInfo && streamInfo.id === voPeriod.id) {
return voPeriod;
}
}
return null;
}
function convertAdaptationToMediaInfo(adaptation) {
Iif (!adaptation) {
return null;
}
let mediaInfo = new MediaInfo();
const realAdaptation = adaptation.period.mpd.manifest.Period[adaptation.period.index].AdaptationSet[adaptation.index];
mediaInfo.id = adaptation.id;
mediaInfo.index = adaptation.index;
mediaInfo.codec = dashManifestModel.getCodec(realAdaptation);
const enhancementCodecs = settings.get().streaming.enhancement.codecs;
mediaInfo.type = enhancementCodecs.some(codec => mediaInfo.codec?.includes(codec)) ? Constants.ENHANCEMENT : adaptation.type;
mediaInfo.streamInfo = convertPeriodToStreamInfo(adaptation.period);
mediaInfo.representationCount = dashManifestModel.getRepresentationCount(realAdaptation);
mediaInfo.labels = dashManifestModel.getLabelsForAdaptation(realAdaptation);
mediaInfo.lang = dashManifestModel.getLanguageForAdaptation(realAdaptation);
mediaInfo.segmentAlignment = dashManifestModel.getSegmentAlignment(realAdaptation);
mediaInfo.subSegmentAlignment = dashManifestModel.getSubSegmentAlignment(realAdaptation);
mediaInfo.viewpoint = dashManifestModel.getViewpointForAdaptation(realAdaptation);
mediaInfo.accessibility = dashManifestModel.getAccessibilityForAdaptation(realAdaptation);
if (mediaInfo.accessibility.filter(function (accessibility) {
if (accessibility.schemeIdUri && (accessibility.schemeIdUri.search('cea-608') >= 0) && typeof (cea608parser) !== 'undefined') {
return true;
}
})[0]) {
mediaInfo.embeddedCaptions = true;
}
mediaInfo.audioChannelConfiguration = dashManifestModel.getAudioChannelConfigurationForAdaptation(realAdaptation);
if (mediaInfo.audioChannelConfiguration.length === 0 && realAdaptation.Representation && realAdaptation.Representation.length > 0) {
mediaInfo.audioChannelConfiguration = dashManifestModel.getAudioChannelConfigurationForRepresentation(realAdaptation.Representation[0]);
}
mediaInfo.roles = dashManifestModel.getRolesForAdaptation(realAdaptation);
mediaInfo.mimeType = dashManifestModel.getMimeType(realAdaptation);
mediaInfo.contentProtection = dashManifestModel.getContentProtectionByAdaptation(realAdaptation);
mediaInfo.bitrateList = dashManifestModel.getBitrateListForAdaptation(realAdaptation);
mediaInfo.selectionPriority = dashManifestModel.getSelectionPriority(realAdaptation);
Iif (mediaInfo.contentProtection && mediaInfo.contentProtection.length > 0) {
mediaInfo.contentProtection = _applyContentProtectionReferencing(mediaInfo.contentProtection, adaptation.period.mpd.manifest);
mediaInfo.contentProtection = _applyDefaultKeyId(mediaInfo.contentProtection);
mediaInfo.normalizedKeyIds = _getNormalizedKeyIds(mediaInfo.contentProtection);
}
mediaInfo.isText = dashManifestModel.getIsText(realAdaptation);
mediaInfo.essentialProperties = dashManifestModel.getCombinedEssentialPropertiesForAdaptationSet(realAdaptation);
mediaInfo.supplementalProperties = dashManifestModel.getCombinedSupplementalPropertiesForAdaptationSet(realAdaptation);
mediaInfo.isFragmented = dashManifestModel.getIsFragmented(realAdaptation);
mediaInfo.isEmbedded = false;
mediaInfo.adaptationSetSwitchingCompatibleIds = _getAdaptationSetSwitchingCompatibleIds(mediaInfo);
mediaInfo.segmentSequenceProperties = dashManifestModel.getSegmentSequencePropertiesForAdaptationSet(realAdaptation);
return mediaInfo;
}
function convertPreselectionToMediaInfo(preselection) {
Iif (!preselection) {
return null;
}
let mediaInfo = new MediaInfo();
const realPreselection = preselection.period.mpd.manifest.Period[preselection.period.index].Preselection[preselection.index];
const realAdaptation = preselection.period.mpd.manifest.Period[preselection.period.index].AdaptationSet;
// initialize mediaInfo with properties from main adaptation set
const adaptation = dashManifestModel.getAdaptationsForPeriod(preselection.period);
const mainAdaptation = dashManifestModel.getMainAdaptationSetForPreselection(realPreselection, adaptation);
mediaInfo = convertAdaptationToMediaInfo(mainAdaptation);
if (mediaInfo) {
mediaInfo.isPreselection = true;
mediaInfo.tag = preselection.tag;
mediaInfo.id = preselection.id;
mediaInfo.codec = dashManifestModel.getCodecForPreselection(realPreselection, realAdaptation);
mediaInfo.selectionPriority = dashManifestModel.getSelectionPriority(realPreselection);
mediaInfo.labels = dashManifestModel.getLabelsForAdaptation(realPreselection);
mediaInfo.lang = dashManifestModel.getLanguageForAdaptation(realPreselection);
mediaInfo.viewpoint = dashManifestModel.getViewpointForAdaptation(realPreselection);
mediaInfo.accessibility = dashManifestModel.getAccessibilityForAdaptation(realPreselection);
mediaInfo.audioChannelConfiguration = dashManifestModel.getAudioChannelConfigurationForAdaptation(realPreselection);
mediaInfo.roles = dashManifestModel.getRolesForAdaptation(realPreselection);
mediaInfo.essentialProperties = dashManifestModel.getCombinedEssentialPropertiesForAdaptationSet(realPreselection);
mediaInfo.supplementalProperties = dashManifestModel.getCombinedSupplementalPropertiesForAdaptationSet(realPreselection);
}
return mediaInfo;
}
function _applyDefaultKeyId(contentProtection) {
const keyIds = contentProtection.map(cp => cp.cencDefaultKid).filter(kid => kid !== null);
if (keyIds.length) {
const keyId = keyIds[0];
contentProtection.forEach(cp => {
cp.keyId = keyId;
});
}
return contentProtection
}
function _applyContentProtectionReferencing(contentProtection, manifest) {
if (!contentProtection || !contentProtection.length || !manifest) {
return contentProtection
}
const allContentProtectionElements = dashManifestModel.getContentProtectionByManifest(manifest)
if (!allContentProtectionElements || !allContentProtectionElements.length) {
return contentProtection
}
const contentProtectionElementsByRefId = allContentProtectionElements.reduce((acc, curr) => {
if (curr.refId) {
acc.set(curr.refId, curr);
}
return acc
}, new Map())
return contentProtection.map((contentProtectionElement) => {
if (contentProtectionElement.ref) {
const contentProtectionElementSource = contentProtectionElementsByRefId.get(contentProtectionElement.ref);
if (contentProtectionElementSource) {
contentProtectionElement.mergeAttributesFromReference(contentProtectionElementSource)
}
}
return contentProtectionElement
})
}
function _getNormalizedKeyIds(contentProtection) {
const normalizedKeyIds = new Set();
contentProtection.forEach((contentProtectionElement) => {
if (contentProtectionElement.cencDefaultKid && typeof contentProtectionElement.cencDefaultKid === 'string') {
normalizedKeyIds.add(contentProtectionElement.cencDefaultKid.replace(/-/g, '').toLowerCase());
}
})
return normalizedKeyIds
}
function _getAdaptationSetSwitchingCompatibleIds(mediaInfo) {
Iif (!mediaInfo || !mediaInfo.supplementalProperties) {
return []
}
let adaptationSetSwitchingCompatibleIds = []
const adaptationSetSwitching = mediaInfo.supplementalProperties.filter((sp) => {
return sp.schemeIdUri === DashConstants.ADAPTATION_SET_SWITCHING_SCHEME_ID_URI
});
Iif (adaptationSetSwitching && adaptationSetSwitching.length > 0) {
const ids = adaptationSetSwitching[0].value.toString().split(',')
adaptationSetSwitchingCompatibleIds = ids.map((id) => {
return id
})
}
return adaptationSetSwitchingCompatibleIds
}
function convertVideoInfoToEmbeddedTextInfo(mediaInfo, channel, lang) {
mediaInfo.id = channel; // CC1, CC2, CC3, or CC4
mediaInfo.index = 100 + parseInt(channel.substring(2, 3));
mediaInfo.type = constants.TEXT;
mediaInfo.codec = 'cea-608-in-SEI';
mediaInfo.isEmbedded = true;
mediaInfo.isFragmented = false;
mediaInfo.lang = bcp47Normalize(lang);
mediaInfo.roles = [{ schemeIdUri: 'urn:mpeg:dash:role:2011', value: 'caption' }];
}
function convertVideoInfoToThumbnailInfo(mediaInfo) {
mediaInfo.type = constants.IMAGE;
}
function convertPeriodToStreamInfo(period) {
let streamInfo = new StreamInfo();
const THRESHOLD = 1;
streamInfo.id = period.id;
streamInfo.index = period.index;
streamInfo.start = period.start;
streamInfo.duration = period.duration;
streamInfo.manifestInfo = convertMpdToManifestInfo(period.mpd);
streamInfo.isLast = period.mpd.manifest.Period.length === 1 || Math.abs((streamInfo.start + streamInfo.duration) - streamInfo.manifestInfo.duration) < THRESHOLD;
streamInfo.isEncrypted = period.isEncrypted;
return streamInfo;
}
function convertMpdToManifestInfo(mpd) {
let manifestInfo = new ManifestInfo();
manifestInfo.dvrWindowSize = mpd.timeShiftBufferDepth;
manifestInfo.loadedTime = mpd.manifest.loadedTime;
manifestInfo.availableFrom = mpd.availabilityStartTime;
manifestInfo.minBufferTime = mpd.manifest.minBufferTime;
manifestInfo.maxFragmentDuration = mpd.maxSegmentDuration;
manifestInfo.duration = dashManifestModel.getDuration(mpd.manifest);
manifestInfo.isDynamic = dashManifestModel.getIsDynamic(mpd.manifest);
manifestInfo.serviceDescriptions = dashManifestModel.getServiceDescriptions(mpd.manifest);
manifestInfo.protocol = mpd.manifest.protocol;
return manifestInfo;
}
function checkConfig() {
if (!constants) {
throw new Error('setConfig function has to be called previously');
}
}
function getPeriod(periodIdx) {
return voPeriods.length > 0 ? voPeriods[0].mpd.manifest.Period[periodIdx] : null;
}
function findRepresentationIndex(period, representationId) {
const index = findRepresentation(period, representationId, true);
return index !== null ? index : -1;
}
function findRepresentation(period, representationId, returnIndex) {
let adaptationSet,
adaptationSetArray,
representation,
representationArray,
adaptationSetArrayIndex,
representationArrayIndex;
Iif (period) {
adaptationSetArray = period.AdaptationSet;
for (adaptationSetArrayIndex = 0; adaptationSetArrayIndex < adaptationSetArray.length; adaptationSetArrayIndex = adaptationSetArrayIndex + 1) {
adaptationSet = adaptationSetArray[adaptationSetArrayIndex];
representationArray = adaptationSet.Representation;
for (representationArrayIndex = 0; representationArrayIndex < representationArray.length; representationArrayIndex = representationArrayIndex + 1) {
representation = representationArray[representationArrayIndex];
if (representationId === representation.id) {
if (returnIndex) {
return representationArrayIndex;
} else {
return representation;
}
}
}
}
}
return null;
}
// #endregion PRIVATE FUNCTIONS
instance = {
applyPatchToManifest,
areMediaInfosEqual,
getAllMediaInfoForType,
getAvailabilityStartTime,
getBandwidthForRepresentation,
getBaseURLsFromElement,
getCodec,
getCodecForPreselection,
getContentSteering,
getDuration,
getEssentialProperties,
getEvent,
getEventsFor,
getFramerate,
getIndexForRepresentation,
getIsDVB,
getIsDynamic,
getIsPatch,
getIsTextTrack,
getIsTypeOf,
getLocation,
getMainAdaptationForType,
getMainAdaptationSetForPreselection,
getCommonRepresentationForPreselection,
getManifestUpdatePeriod,
getMediaInfoForType,
getMpd,
getPatchLocation,
getPeriodById,
getPreselectionIsTypeOf,
getProducerReferenceTimes,
getPublishTime,
getRealAdaptation,
getRealPeriodByIndex,
getRegularPeriods,
getRepresentationSortFunction,
getStreamsInfo,
getSuggestedPresentationDelay,
getSupplementalCodecs,
getUTCTimingSources,
getVoRepresentations,
isPatchValid,
reset,
setConfig,
updatePeriods,
};
setup();
return instance;
}
DashAdapter.__dashjs_factory_name = 'DashAdapter';
export default FactoryMaker.getSingletonFactory(DashAdapter);
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