shaka-player
Version:
DASH/EME video player library
1,112 lines (990 loc) • 33.1 kB
JavaScript
/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.transmuxer.TsTransmuxer');
goog.require('shaka.media.Capabilities');
goog.require('shaka.transmuxer.AacTransmuxer');
goog.require('shaka.transmuxer.Ac3');
goog.require('shaka.transmuxer.ADTS');
goog.require('shaka.transmuxer.Ec3');
goog.require('shaka.transmuxer.H264');
goog.require('shaka.transmuxer.H265');
goog.require('shaka.transmuxer.MpegAudio');
goog.require('shaka.transmuxer.Opus');
goog.require('shaka.transmuxer.TransmuxerEngine');
goog.require('shaka.util.BufferUtils');
goog.require('shaka.util.Error');
goog.require('shaka.util.Id3Utils');
goog.require('shaka.util.ManifestParserUtils');
goog.require('shaka.util.MimeUtils');
goog.require('shaka.util.Mp4Generator');
goog.require('shaka.util.StreamUtils');
goog.require('shaka.util.TsParser');
goog.require('shaka.util.Uint8ArrayUtils');
goog.requireType('shaka.media.SegmentReference');
/**
* @implements {shaka.extern.Transmuxer}
* @export
*/
shaka.transmuxer.TsTransmuxer = class {
/**
* @param {string} mimeType
*/
constructor(mimeType) {
/** @private {string} */
this.originalMimeType_ = mimeType;
/** @private {number} */
this.frameIndex_ = 0;
/** @private {!Map<string, !Uint8Array>} */
this.initSegments = new Map();
/** @private {?shaka.util.TsParser} */
this.tsParser_ = null;
/** @private {?shaka.transmuxer.AacTransmuxer} */
this.aacTransmuxer_ = null;
/** @private {?Uint8Array} */
this.lastInitSegment_ = null;
}
/**
* @override
* @export
*/
destroy() {
this.initSegments.clear();
if (this.aacTransmuxer_) {
this.aacTransmuxer_.destroy();
}
}
/**
* Check if the mime type and the content type is supported.
* @param {string} mimeType
* @param {string=} contentType
* @return {boolean}
* @override
* @export
*/
isSupported(mimeType, contentType) {
const Capabilities = shaka.media.Capabilities;
if (!this.isTsContainer_(mimeType)) {
return false;
}
const ContentType = shaka.util.ManifestParserUtils.ContentType;
const MimeUtils = shaka.util.MimeUtils;
let convertedMimeType = mimeType;
if (contentType) {
convertedMimeType = this.convertCodecs(contentType, mimeType);
}
const codecs = MimeUtils.getCodecs(convertedMimeType);
const allCodecs = MimeUtils.splitCodecs(codecs);
const audioCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
ContentType.AUDIO, allCodecs);
const videoCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
ContentType.VIDEO, allCodecs);
const TsTransmuxer = shaka.transmuxer.TsTransmuxer;
if (audioCodec) {
const normalizedCodec = MimeUtils.getNormalizedCodec(audioCodec);
if (!TsTransmuxer.SUPPORTED_AUDIO_CODECS_.includes(normalizedCodec)) {
return false;
}
}
if (videoCodec) {
const normalizedCodec = MimeUtils.getNormalizedCodec(videoCodec);
if (!TsTransmuxer.SUPPORTED_VIDEO_CODECS_.includes(normalizedCodec)) {
return false;
}
}
if (contentType) {
return Capabilities.isTypeSupported(
this.convertCodecs(contentType, mimeType));
}
const audioMime = this.convertCodecs(ContentType.AUDIO, mimeType);
const videoMime = this.convertCodecs(ContentType.VIDEO, mimeType);
return Capabilities.isTypeSupported(audioMime) ||
Capabilities.isTypeSupported(videoMime);
}
/**
* Check if the mimetype is 'video/mp2t'.
* @param {string} mimeType
* @return {boolean}
* @private
*/
isTsContainer_(mimeType) {
return mimeType.toLowerCase().split(';')[0] == 'video/mp2t';
}
/**
* @override
* @export
*/
convertCodecs(contentType, mimeType) {
if (this.isTsContainer_(mimeType)) {
const ContentType = shaka.util.ManifestParserUtils.ContentType;
const StreamUtils = shaka.util.StreamUtils;
// The replace it's necessary because Firefox(the only browser that
// supports MP3 in MP4) only support the MP3 codec with the mp3 string.
// MediaSource.isTypeSupported('audio/mp4; codecs="mp4a.40.34"') -> false
// MediaSource.isTypeSupported('audio/mp4; codecs="mp3"') -> true
const codecs = shaka.util.MimeUtils.getCodecs(mimeType)
.replace('mp4a.40.34', 'mp3').split(',')
.map((codecs) => {
return StreamUtils.getCorrectAudioCodecs(codecs, 'audio/mp4');
})
.map(StreamUtils.getCorrectVideoCodecs).join(',');
if (contentType == ContentType.AUDIO) {
return `audio/mp4; codecs="${codecs}"`;
}
return `video/mp4; codecs="${codecs}"`;
}
return mimeType;
}
/**
* @override
* @export
*/
getOriginalMimeType() {
return this.originalMimeType_;
}
/**
* @override
* @export
*/
transmux(data, stream, reference, duration, contentType) {
const ContentType = shaka.util.ManifestParserUtils.ContentType;
const Uint8ArrayUtils = shaka.util.Uint8ArrayUtils;
const uint8ArrayData = shaka.util.BufferUtils.toUint8(data);
if (contentType == ContentType.AUDIO &&
!shaka.util.TsParser.probe(uint8ArrayData)) {
const id3Data = shaka.util.Id3Utils.getID3Data(uint8ArrayData);
let offset = id3Data.length;
for (; offset < uint8ArrayData.length; offset++) {
if (shaka.transmuxer.MpegAudio.probe(uint8ArrayData, offset)) {
return Promise.reject(new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null));
}
}
offset = id3Data.length;
for (; offset < uint8ArrayData.length; offset++) {
if (shaka.transmuxer.ADTS.probe(uint8ArrayData, offset)) {
if (!this.aacTransmuxer_) {
this.aacTransmuxer_ =
new shaka.transmuxer.AacTransmuxer('audio/aac');
}
return this.aacTransmuxer_
.transmux(data, stream, reference, duration, contentType);
}
}
return Promise.reject(new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null));
}
if (!this.tsParser_) {
this.tsParser_ = new shaka.util.TsParser();
} else {
this.tsParser_.clearData();
}
const tsParser = this.tsParser_.parse(uint8ArrayData);
const streamInfos = [];
const codecs = tsParser.getCodecs();
try {
let streamInfo = null;
if (contentType == ContentType.VIDEO) {
switch (codecs.video) {
case 'avc':
streamInfo =
this.getAvcStreamInfo_(tsParser, stream, duration, reference);
break;
case 'hvc':
streamInfo =
this.getHvcStreamInfo_(tsParser, stream, duration, reference);
break;
}
if (streamInfo) {
streamInfos.push(streamInfo);
streamInfo = null;
}
}
if (contentType == ContentType.AUDIO) {
switch (codecs.audio) {
case 'aac':
streamInfo =
this.getAacStreamInfo_(tsParser, stream, duration, reference);
break;
case 'ac3':
streamInfo =
this.getAc3StreamInfo_(tsParser, stream, duration, reference);
break;
case 'ec3':
streamInfo =
this.getEc3StreamInfo_(tsParser, stream, duration, reference);
break;
case 'mp3':
streamInfo =
this.getMp3StreamInfo_(tsParser, stream, duration, reference);
break;
case 'opus':
streamInfo =
this.getOpusStreamInfo_(tsParser, stream, duration, reference);
break;
}
if (streamInfo) {
streamInfos.push(streamInfo);
streamInfo = null;
}
}
} catch (e) {
if (e && e.code == shaka.util.Error.Code.TRANSMUXING_NO_VIDEO_DATA) {
return Promise.resolve(new Uint8Array([]));
}
return Promise.reject(e);
}
if (!streamInfos.length) {
return Promise.reject(new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null));
}
const mp4Generator = new shaka.util.Mp4Generator(streamInfos);
let initSegment;
const initSegmentKey = stream.id + '_' + reference.discontinuitySequence;
if (!this.initSegments.has(initSegmentKey)) {
initSegment = mp4Generator.initSegment();
this.initSegments.set(initSegmentKey, initSegment);
} else {
initSegment = this.initSegments.get(initSegmentKey);
}
const appendInitSegment = this.lastInitSegment_ !== initSegment;
const segmentData = mp4Generator.segmentData();
this.lastInitSegment_ = initSegment;
this.frameIndex_++;
if (appendInitSegment) {
const transmuxData = Uint8ArrayUtils.concat(initSegment, segmentData);
return Promise.resolve(transmuxData);
} else {
return Promise.resolve(segmentData);
}
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getAacStreamInfo_(tsParser, stream, duration, reference) {
const ADTS = shaka.transmuxer.ADTS;
const timescale = shaka.util.TsParser.Timescale;
const Uint8ArrayUtils = shaka.util.Uint8ArrayUtils;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
let info;
let firstPts = null;
/** @type {?number} */
let nextStartOffset = null;
/** @type {?Uint8Array} */
let overflowBytes = null;
for (const audioData of tsParser.getAudioData()) {
let data = audioData.data;
if (!data) {
continue;
}
let offset = 0;
if (nextStartOffset == -1 && overflowBytes) {
data = Uint8ArrayUtils.concat(overflowBytes, audioData.data);
nextStartOffset = null;
} else if (nextStartOffset != null && overflowBytes) {
offset = Math.max(0, nextStartOffset);
const missingFrameData =
Uint8ArrayUtils.concat(overflowBytes, data.subarray(0, offset));
samples.push({
data: missingFrameData,
size: missingFrameData.byteLength,
duration: ADTS.AAC_SAMPLES_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
overflowBytes = null;
nextStartOffset = null;
}
info = ADTS.parseInfo(data, offset);
if (!info) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
stream.audioSamplingRate = info.sampleRate;
stream.channelsCount = info.channelCount;
if (firstPts == null && audioData.pts !== null) {
firstPts = audioData.pts;
}
while (offset < data.length) {
const header = ADTS.parseHeader(data, offset);
if (!header) {
overflowBytes = data.subarray(offset, data.length);
nextStartOffset = -1;
break;
}
const length = header.headerLength + header.frameLength;
nextStartOffset = Math.max(0, offset + length - data.length);
if (nextStartOffset != 0) {
overflowBytes = data.subarray(
offset + header.headerLength, offset + length);
} else if (offset + length <= data.length) {
const frameData = data.subarray(
offset + header.headerLength, offset + length);
samples.push({
data: frameData,
size: header.frameLength,
duration: ADTS.AAC_SAMPLES_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
}
offset += length;
}
}
if (!info || firstPts == null) {
if (!tsParser.getVideoData().length) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
firstPts = reference.startTime * timescale;
const allCodecs = shaka.util.MimeUtils.splitCodecs(stream.codecs);
const audioCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
shaka.util.ManifestParserUtils.ContentType.AUDIO, allCodecs);
if (!audioCodec || !stream.channelsCount || !stream.audioSamplingRate) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
info = {
sampleRate: stream.audioSamplingRate,
channelCount: stream.channelsCount,
codec: audioCodec,
};
const silenceFrame =
ADTS.getSilentFrame(audioCodec, stream.channelsCount);
if (!silenceFrame) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
const segmentDuration =
(reference.endTime - reference.startTime) * timescale;
const finalPTs = firstPts + segmentDuration;
let currentPts = firstPts;
while (currentPts < finalPTs) {
samples.push({
data: silenceFrame,
size: silenceFrame.byteLength,
duration: ADTS.AAC_SAMPLES_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
currentPts += ADTS.AAC_SAMPLES_PER_FRAME / info.sampleRate * timescale;
}
}
/** @type {number} */
const sampleRate = info.sampleRate;
/** @type {number} */
const baseMediaDecodeTime = firstPts / timescale * sampleRate;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.AUDIO,
codecs: info.codec,
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: sampleRate,
duration: duration,
videoNalus: [],
audioConfig: new Uint8Array([]),
videoConfig: new Uint8Array([]),
hSpacing: 0,
vSpacing: 0,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getAc3StreamInfo_(tsParser, stream, duration, reference) {
const Ac3 = shaka.transmuxer.Ac3;
const timescale = shaka.util.TsParser.Timescale;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
/** @type {number} */
let sampleRate = 0;
/** @type {!Uint8Array} */
let audioConfig = new Uint8Array([]);
let firstPts = null;
for (const audioData of tsParser.getAudioData()) {
const data = audioData.data;
if (firstPts == null && audioData.pts !== null) {
firstPts = audioData.pts;
}
let offset = 0;
while (offset < data.length) {
const frame = Ac3.parseFrame(data, offset);
if (!frame) {
offset++;
continue;
}
stream.audioSamplingRate = frame.sampleRate;
stream.channelsCount = frame.channelCount;
sampleRate = frame.sampleRate;
audioConfig = frame.audioConfig;
const frameData = data.subarray(
offset, offset + frame.frameLength);
samples.push({
data: frameData,
size: frame.frameLength,
duration: Ac3.AC3_SAMPLES_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
offset += frame.frameLength;
}
}
if (sampleRate == 0 || audioConfig.byteLength == 0 || firstPts == null) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
/** @type {number} */
const baseMediaDecodeTime = firstPts / timescale * sampleRate;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.AUDIO,
codecs: 'ac-3',
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: sampleRate,
duration: duration,
videoNalus: [],
audioConfig: audioConfig,
videoConfig: new Uint8Array([]),
hSpacing: 0,
vSpacing: 0,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getEc3StreamInfo_(tsParser, stream, duration, reference) {
const Ec3 = shaka.transmuxer.Ec3;
const timescale = shaka.util.TsParser.Timescale;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
/** @type {number} */
let sampleRate = 0;
/** @type {!Uint8Array} */
let audioConfig = new Uint8Array([]);
let firstPts = null;
for (const audioData of tsParser.getAudioData()) {
const data = audioData.data;
if (firstPts == null && audioData.pts !== null) {
firstPts = audioData.pts;
}
let offset = 0;
while (offset < data.length) {
const frame = Ec3.parseFrame(data, offset);
if (!frame) {
offset++;
continue;
}
stream.audioSamplingRate = frame.sampleRate;
stream.channelsCount = frame.channelCount;
sampleRate = frame.sampleRate;
audioConfig = frame.audioConfig;
const frameData = data.subarray(
offset, offset + frame.frameLength);
samples.push({
data: frameData,
size: frame.frameLength,
duration: Ec3.EC3_SAMPLES_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
offset += frame.frameLength;
}
}
if (sampleRate == 0 || audioConfig.byteLength == 0 || firstPts == null) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
/** @type {number} */
const baseMediaDecodeTime = firstPts / timescale * sampleRate;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.AUDIO,
codecs: 'ec-3',
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: sampleRate,
duration: duration,
videoNalus: [],
audioConfig: audioConfig,
videoConfig: new Uint8Array([]),
hSpacing: 0,
vSpacing: 0,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getMp3StreamInfo_(tsParser, stream, duration, reference) {
const MpegAudio = shaka.transmuxer.MpegAudio;
const timescale = shaka.util.TsParser.Timescale;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
let firstHeader;
let firstPts = null;
for (const audioData of tsParser.getAudioData()) {
const data = audioData.data;
if (!data) {
continue;
}
if (firstPts == null && audioData.pts !== null) {
firstPts = audioData.pts;
}
let offset = 0;
while (offset < data.length) {
const header = MpegAudio.parseHeader(data, offset);
if (!header) {
offset++;
continue;
}
if (!firstHeader) {
firstHeader = header;
}
if (offset + header.frameLength <= data.length) {
samples.push({
data: data.subarray(offset, offset + header.frameLength),
size: header.frameLength,
duration: MpegAudio.MPEG_AUDIO_SAMPLE_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
}
offset += header.frameLength;
}
}
if (!firstHeader || firstPts == null) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
/** @type {number} */
const sampleRate = firstHeader.sampleRate;
/** @type {number} */
const baseMediaDecodeTime = firstPts / timescale * sampleRate;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.AUDIO,
codecs: 'mp3',
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: sampleRate,
duration: duration,
videoNalus: [],
audioConfig: new Uint8Array([]),
videoConfig: new Uint8Array([]),
hSpacing: 0,
vSpacing: 0,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getOpusStreamInfo_(tsParser, stream, duration, reference) {
const Opus = shaka.transmuxer.Opus;
const timescale = shaka.util.TsParser.Timescale;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
let firstPts = null;
/** @type {?shaka.util.TsParser.OpusMetadata} */
const opusMetadata = tsParser.getOpusMetadata();
if (!opusMetadata) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
/** @type {!Uint8Array} */
const audioConfig = Opus.getAudioConfig(opusMetadata);
/** @type {number} */
const sampleRate = opusMetadata.sampleRate;
for (const audioData of tsParser.getAudioData()) {
const data = audioData.data;
if (firstPts == null && audioData.pts !== null) {
firstPts = audioData.pts;
}
let offset = 0;
while (offset < data.length) {
const opusPendingTrimStart = (data[offset + 1] & 0x10) !== 0;
const trimEnd = (data[offset + 1] & 0x08) !== 0;
let index = offset + 2;
let size = 0;
while (data[index] === 0xFF) {
size += 255;
index += 1;
}
size += data[index];
index += 1;
index += opusPendingTrimStart ? 2 : 0;
index += trimEnd ? 2 : 0;
const sample = data.slice(index, index + size);
samples.push({
data: sample,
size: sample.byteLength,
duration: Opus.OPUS_AUDIO_SAMPLE_PER_FRAME,
cts: 0,
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: 2,
isNonSync: 0,
},
});
offset = index + size;
}
}
if (audioConfig.byteLength == 0 || firstPts == null) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
stream.audioSamplingRate = opusMetadata.sampleRate;
stream.channelsCount = opusMetadata.channelCount;
/** @type {number} */
const baseMediaDecodeTime = firstPts / timescale * sampleRate;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.AUDIO,
codecs: 'opus',
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: sampleRate,
duration: duration,
videoNalus: [],
audioConfig: audioConfig,
videoConfig: new Uint8Array([]),
hSpacing: 0,
vSpacing: 0,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getAvcStreamInfo_(tsParser, stream, duration, reference) {
const H264 = shaka.transmuxer.H264;
const timescale = shaka.util.TsParser.Timescale;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
/** @type {?number} */
let baseMediaDecodeTime = null;
const videoData = tsParser.getVideoData();
const videoSamples = H264.getVideoSamples(videoData);
if (!videoSamples.length) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_NO_VIDEO_DATA,
reference ? reference.getUris()[0] : null);
}
for (let i = 0; i < videoSamples.length; i++) {
const videoSample = videoSamples[i];
if (baseMediaDecodeTime == null) {
baseMediaDecodeTime = videoSample.dts;
}
let duration;
if (i + 1 < videoSamples.length) {
duration = (videoSamples[i + 1].dts || 0) - (videoSample.dts || 0);
} else if (videoSamples.length > 1) {
duration = (videoSample.dts || 0) - (videoSamples[i - 1].dts || 0);
} else {
duration = (reference.endTime - reference.startTime) * timescale;
}
samples.push({
data: videoSample.data,
size: videoSample.data.byteLength,
duration: duration,
cts: Math.round((videoSample.pts || 0) - (videoSample.dts || 0)),
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: videoSample.isKeyframe ? 2 : 1,
isNonSync: videoSample.isKeyframe ? 0 : 1,
},
});
}
const nalus = [];
for (const pes of videoData) {
nalus.push(...pes.nalus);
}
const info = H264.parseInfo(nalus);
if (!info || baseMediaDecodeTime == null) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
stream.height = info.height;
stream.width = info.width;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.VIDEO,
codecs: 'avc1',
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: timescale,
duration: duration,
videoNalus: [],
audioConfig: new Uint8Array([]),
videoConfig: info.videoConfig,
hSpacing: info.hSpacing,
vSpacing: info.vSpacing,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
/**
* @param {shaka.util.TsParser} tsParser
* @param {shaka.extern.Stream} stream
* @param {number} duration
* @param {?shaka.media.SegmentReference} reference
* @return {shaka.util.Mp4Generator.StreamInfo}
* @private
*/
getHvcStreamInfo_(tsParser, stream, duration, reference) {
const H265 = shaka.transmuxer.H265;
const timescale = shaka.util.TsParser.Timescale;
/** @type {!Array<shaka.util.Mp4Generator.Mp4Sample>} */
const samples = [];
/** @type {?number} */
let baseMediaDecodeTime = null;
const nalus = [];
const videoData = tsParser.getVideoData();
if (!videoData.length) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_NO_VIDEO_DATA,
reference ? reference.getUris()[0] : null);
}
for (let i = 0; i < videoData.length; i++) {
const pes = videoData[i];
const dataNalus = pes.nalus;
nalus.push(...dataNalus);
const frame = H265.parseFrame(dataNalus);
if (!frame) {
continue;
}
if (baseMediaDecodeTime == null && pes.dts != null) {
baseMediaDecodeTime = pes.dts;
}
let duration;
if (i + 1 < videoData.length) {
duration = (videoData[i + 1].dts || 0) - (pes.dts || 0);
} else if (videoData.length > 1) {
duration = (pes.dts || 0) - (videoData[i - 1].dts || 0);
} else {
duration = (reference.endTime - reference.startTime) * timescale;
}
samples.push({
data: frame.data,
size: frame.data.byteLength,
duration: duration,
cts: Math.round((pes.pts || 0) - (pes.dts || 0)),
flags: {
isLeading: 0,
isDependedOn: 0,
hasRedundancy: 0,
degradPrio: 0,
dependsOn: frame.isKeyframe ? 2 : 1,
isNonSync: frame.isKeyframe ? 0 : 1,
},
});
}
const info = H265.parseInfo(nalus);
if (!info || baseMediaDecodeTime == null) {
throw new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.TRANSMUXING_FAILED,
reference ? reference.getUris()[0] : null);
}
stream.height = info.height;
stream.width = info.width;
return {
id: stream.id,
type: shaka.util.ManifestParserUtils.ContentType.VIDEO,
codecs: 'hvc1',
encrypted: stream.encrypted && stream.drmInfos.length > 0,
timescale: timescale,
duration: duration,
videoNalus: [],
audioConfig: new Uint8Array([]),
videoConfig: info.videoConfig,
hSpacing: info.hSpacing,
vSpacing: info.vSpacing,
data: {
sequenceNumber: this.frameIndex_,
baseMediaDecodeTime: baseMediaDecodeTime,
samples: samples,
},
stream: stream,
};
}
};
/**
* Supported audio codecs.
*
* @private
* @const {!Array<string>}
*/
shaka.transmuxer.TsTransmuxer.SUPPORTED_AUDIO_CODECS_ = [
'aac',
'ac-3',
'ec-3',
'mp3',
'opus',
];
/**
* Supported audio codecs.
*
* @private
* @const {!Array<string>}
*/
shaka.transmuxer.TsTransmuxer.SUPPORTED_VIDEO_CODECS_ = [
'avc',
'hevc',
];
shaka.transmuxer.TransmuxerEngine.registerTransmuxer(
'video/mp2t',
() => new shaka.transmuxer.TsTransmuxer('video/mp2t'),
shaka.transmuxer.TransmuxerEngine.PluginPriority.PREFERRED);