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Code Issues Releases Wiki Activity

Improving the get restream credentials

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DanieL 2022-05-20 16:22:54 -03:00
parent 654dda115a
commit 56cb1fd5cb
6058 changed files with 1166166 additions and 1430809 deletions
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248
node_modules/mux.js/cjs/aac/index.js generated vendored
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@ -1,125 +1,125 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* A stream-based aac to mp4 converter. This utility can be used to
* deliver mp4s to a SourceBuffer on platforms that support native
* Media Source Extensions.
*/
'use strict';
var Stream = require('../utils/stream.js');
var aacUtils = require('./utils'); // Constants
var _AacStream;
/**
* Splits an incoming stream of binary data into ADTS and ID3 Frames.
*/
_AacStream = function AacStream() {
var everything = new Uint8Array(),
timeStamp = 0;
_AacStream.prototype.init.call(this);
this.setTimestamp = function (timestamp) {
timeStamp = timestamp;
};
this.push = function (bytes) {
var frameSize = 0,
byteIndex = 0,
bytesLeft,
chunk,
packet,
tempLength; // If there are bytes remaining from the last segment, prepend them to the
// bytes that were pushed in
if (everything.length) {
tempLength = everything.length;
everything = new Uint8Array(bytes.byteLength + tempLength);
everything.set(everything.subarray(0, tempLength));
everything.set(bytes, tempLength);
} else {
everything = bytes;
}
while (everything.length - byteIndex >= 3) {
if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {
// Exit early because we don't have enough to parse
// the ID3 tag header
if (everything.length - byteIndex < 10) {
break;
} // check framesize
frameSize = aacUtils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer
// to emit a full packet
// Add to byteIndex to support multiple ID3 tags in sequence
if (byteIndex + frameSize > everything.length) {
break;
}
chunk = {
type: 'timed-metadata',
data: everything.subarray(byteIndex, byteIndex + frameSize)
};
this.trigger('data', chunk);
byteIndex += frameSize;
continue;
} else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {
// Exit early because we don't have enough to parse
// the ADTS frame header
if (everything.length - byteIndex < 7) {
break;
}
frameSize = aacUtils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer
// to emit a full packet
if (byteIndex + frameSize > everything.length) {
break;
}
packet = {
type: 'audio',
data: everything.subarray(byteIndex, byteIndex + frameSize),
pts: timeStamp,
dts: timeStamp
};
this.trigger('data', packet);
byteIndex += frameSize;
continue;
}
byteIndex++;
}
bytesLeft = everything.length - byteIndex;
if (bytesLeft > 0) {
everything = everything.subarray(byteIndex);
} else {
everything = new Uint8Array();
}
};
this.reset = function () {
everything = new Uint8Array();
this.trigger('reset');
};
this.endTimeline = function () {
everything = new Uint8Array();
this.trigger('endedtimeline');
};
};
_AacStream.prototype = new Stream();
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* A stream-based aac to mp4 converter. This utility can be used to
* deliver mp4s to a SourceBuffer on platforms that support native
* Media Source Extensions.
*/
'use strict';
var Stream = require('../utils/stream.js');
var aacUtils = require('./utils'); // Constants
var _AacStream;
/**
* Splits an incoming stream of binary data into ADTS and ID3 Frames.
*/
_AacStream = function AacStream() {
var everything = new Uint8Array(),
timeStamp = 0;
_AacStream.prototype.init.call(this);
this.setTimestamp = function (timestamp) {
timeStamp = timestamp;
};
this.push = function (bytes) {
var frameSize = 0,
byteIndex = 0,
bytesLeft,
chunk,
packet,
tempLength; // If there are bytes remaining from the last segment, prepend them to the
// bytes that were pushed in
if (everything.length) {
tempLength = everything.length;
everything = new Uint8Array(bytes.byteLength + tempLength);
everything.set(everything.subarray(0, tempLength));
everything.set(bytes, tempLength);
} else {
everything = bytes;
}
while (everything.length - byteIndex >= 3) {
if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {
// Exit early because we don't have enough to parse
// the ID3 tag header
if (everything.length - byteIndex < 10) {
break;
} // check framesize
frameSize = aacUtils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer
// to emit a full packet
// Add to byteIndex to support multiple ID3 tags in sequence
if (byteIndex + frameSize > everything.length) {
break;
}
chunk = {
type: 'timed-metadata',
data: everything.subarray(byteIndex, byteIndex + frameSize)
};
this.trigger('data', chunk);
byteIndex += frameSize;
continue;
} else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {
// Exit early because we don't have enough to parse
// the ADTS frame header
if (everything.length - byteIndex < 7) {
break;
}
frameSize = aacUtils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer
// to emit a full packet
if (byteIndex + frameSize > everything.length) {
break;
}
packet = {
type: 'audio',
data: everything.subarray(byteIndex, byteIndex + frameSize),
pts: timeStamp,
dts: timeStamp
};
this.trigger('data', packet);
byteIndex += frameSize;
continue;
}
byteIndex++;
}
bytesLeft = everything.length - byteIndex;
if (bytesLeft > 0) {
everything = everything.subarray(byteIndex);
} else {
everything = new Uint8Array();
}
};
this.reset = function () {
everything = new Uint8Array();
this.trigger('reset');
};
this.endTimeline = function () {
everything = new Uint8Array();
this.trigger('endedtimeline');
};
};
_AacStream.prototype = new Stream();
module.exports = _AacStream;

318
node_modules/mux.js/cjs/aac/utils.js generated vendored
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@ -1,160 +1,160 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Utilities to detect basic properties and metadata about Aac data.
*/
'use strict';
var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
var parseId3TagSize = function parseId3TagSize(header, byteIndex) {
var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],
flags = header[byteIndex + 5],
footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0
returnSize = returnSize >= 0 ? returnSize : 0;
if (footerPresent) {
return returnSize + 20;
}
return returnSize + 10;
};
var getId3Offset = function getId3Offset(data, offset) {
if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {
return offset;
}
offset += parseId3TagSize(data, offset);
return getId3Offset(data, offset);
}; // TODO: use vhs-utils
var isLikelyAacData = function isLikelyAacData(data) {
var offset = getId3Offset(data, 0);
return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 && // verify that the 2 layer bits are 0, aka this
// is not mp3 data but aac data.
(data[offset + 1] & 0x16) === 0x10;
};
var parseSyncSafeInteger = function parseSyncSafeInteger(data) {
return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
}; // return a percent-encoded representation of the specified byte range
// @see http://en.wikipedia.org/wiki/Percent-encoding
var percentEncode = function percentEncode(bytes, start, end) {
var i,
result = '';
for (i = start; i < end; i++) {
result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
}
return result;
}; // return the string representation of the specified byte range,
// interpreted as ISO-8859-1.
var parseIso88591 = function parseIso88591(bytes, start, end) {
return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
};
var parseAdtsSize = function parseAdtsSize(header, byteIndex) {
var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,
middle = header[byteIndex + 4] << 3,
highTwo = header[byteIndex + 3] & 0x3 << 11;
return highTwo | middle | lowThree;
};
var parseType = function parseType(header, byteIndex) {
if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {
return 'timed-metadata';
} else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {
return 'audio';
}
return null;
};
var parseSampleRate = function parseSampleRate(packet) {
var i = 0;
while (i + 5 < packet.length) {
if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {
// If a valid header was not found, jump one forward and attempt to
// find a valid ADTS header starting at the next byte
i++;
continue;
}
return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];
}
return null;
};
var parseAacTimestamp = function parseAacTimestamp(packet) {
var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag
frameStart = 10;
if (packet[5] & 0x40) {
// advance the frame start past the extended header
frameStart += 4; // header size field
frameStart += parseSyncSafeInteger(packet.subarray(10, 14));
} // parse one or more ID3 frames
// http://id3.org/id3v2.3.0#ID3v2_frame_overview
do {
// determine the number of bytes in this frame
frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));
if (frameSize < 1) {
return null;
}
frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);
if (frameHeader === 'PRIV') {
frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);
for (var i = 0; i < frame.byteLength; i++) {
if (frame[i] === 0) {
var owner = parseIso88591(frame, 0, i);
if (owner === 'com.apple.streaming.transportStreamTimestamp') {
var d = frame.subarray(i + 1);
var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
size *= 4;
size += d[7] & 0x03;
return size;
}
break;
}
}
}
frameStart += 10; // advance past the frame header
frameStart += frameSize; // advance past the frame body
} while (frameStart < packet.byteLength);
return null;
};
module.exports = {
isLikelyAacData: isLikelyAacData,
parseId3TagSize: parseId3TagSize,
parseAdtsSize: parseAdtsSize,
parseType: parseType,
parseSampleRate: parseSampleRate,
parseAacTimestamp: parseAacTimestamp
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Utilities to detect basic properties and metadata about Aac data.
*/
'use strict';
var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
var parseId3TagSize = function parseId3TagSize(header, byteIndex) {
var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],
flags = header[byteIndex + 5],
footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0
returnSize = returnSize >= 0 ? returnSize : 0;
if (footerPresent) {
return returnSize + 20;
}
return returnSize + 10;
};
var getId3Offset = function getId3Offset(data, offset) {
if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {
return offset;
}
offset += parseId3TagSize(data, offset);
return getId3Offset(data, offset);
}; // TODO: use vhs-utils
var isLikelyAacData = function isLikelyAacData(data) {
var offset = getId3Offset(data, 0);
return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 && // verify that the 2 layer bits are 0, aka this
// is not mp3 data but aac data.
(data[offset + 1] & 0x16) === 0x10;
};
var parseSyncSafeInteger = function parseSyncSafeInteger(data) {
return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
}; // return a percent-encoded representation of the specified byte range
// @see http://en.wikipedia.org/wiki/Percent-encoding
var percentEncode = function percentEncode(bytes, start, end) {
var i,
result = '';
for (i = start; i < end; i++) {
result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
}
return result;
}; // return the string representation of the specified byte range,
// interpreted as ISO-8859-1.
var parseIso88591 = function parseIso88591(bytes, start, end) {
return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
};
var parseAdtsSize = function parseAdtsSize(header, byteIndex) {
var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,
middle = header[byteIndex + 4] << 3,
highTwo = header[byteIndex + 3] & 0x3 << 11;
return highTwo | middle | lowThree;
};
var parseType = function parseType(header, byteIndex) {
if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {
return 'timed-metadata';
} else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {
return 'audio';
}
return null;
};
var parseSampleRate = function parseSampleRate(packet) {
var i = 0;
while (i + 5 < packet.length) {
if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {
// If a valid header was not found, jump one forward and attempt to
// find a valid ADTS header starting at the next byte
i++;
continue;
}
return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];
}
return null;
};
var parseAacTimestamp = function parseAacTimestamp(packet) {
var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag
frameStart = 10;
if (packet[5] & 0x40) {
// advance the frame start past the extended header
frameStart += 4; // header size field
frameStart += parseSyncSafeInteger(packet.subarray(10, 14));
} // parse one or more ID3 frames
// http://id3.org/id3v2.3.0#ID3v2_frame_overview
do {
// determine the number of bytes in this frame
frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));
if (frameSize < 1) {
return null;
}
frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);
if (frameHeader === 'PRIV') {
frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);
for (var i = 0; i < frame.byteLength; i++) {
if (frame[i] === 0) {
var owner = parseIso88591(frame, 0, i);
if (owner === 'com.apple.streaming.transportStreamTimestamp') {
var d = frame.subarray(i + 1);
var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
size *= 4;
size += d[7] & 0x03;
return size;
}
break;
}
}
}
frameStart += 10; // advance past the frame header
frameStart += frameSize; // advance past the frame body
} while (frameStart < packet.byteLength);
return null;
};
module.exports = {
isLikelyAacData: isLikelyAacData,
parseId3TagSize: parseId3TagSize,
parseAdtsSize: parseAdtsSize,
parseType: parseType,
parseSampleRate: parseSampleRate,
parseAacTimestamp: parseAacTimestamp
};

296
node_modules/mux.js/cjs/codecs/adts.js generated vendored
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@ -1,149 +1,149 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var Stream = require('../utils/stream.js');
var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
var _AdtsStream;
var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
/*
* Accepts a ElementaryStream and emits data events with parsed
* AAC Audio Frames of the individual packets. Input audio in ADTS
* format is unpacked and re-emitted as AAC frames.
*
* @see http://wiki.multimedia.cx/index.php?title=ADTS
* @see http://wiki.multimedia.cx/?title=Understanding_AAC
*/
_AdtsStream = function AdtsStream(handlePartialSegments) {
var buffer,
frameNum = 0;
_AdtsStream.prototype.init.call(this);
this.skipWarn_ = function (start, end) {
this.trigger('log', {
level: 'warn',
message: "adts skiping bytes " + start + " to " + end + " in frame " + frameNum + " outside syncword"
});
};
this.push = function (packet) {
var i = 0,
frameLength,
protectionSkipBytes,
frameEnd,
oldBuffer,
sampleCount,
adtsFrameDuration;
if (!handlePartialSegments) {
frameNum = 0;
}
if (packet.type !== 'audio') {
// ignore non-audio data
return;
} // Prepend any data in the buffer to the input data so that we can parse
// aac frames the cross a PES packet boundary
if (buffer && buffer.length) {
oldBuffer = buffer;
buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);
buffer.set(oldBuffer);
buffer.set(packet.data, oldBuffer.byteLength);
} else {
buffer = packet.data;
} // unpack any ADTS frames which have been fully received
// for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS
var skip; // We use i + 7 here because we want to be able to parse the entire header.
// If we don't have enough bytes to do that, then we definitely won't have a full frame.
while (i + 7 < buffer.length) {
// Look for the start of an ADTS header..
if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {
if (typeof skip !== 'number') {
skip = i;
} // If a valid header was not found, jump one forward and attempt to
// find a valid ADTS header starting at the next byte
i++;
continue;
}
if (typeof skip === 'number') {
this.skipWarn_(skip, i);
skip = null;
} // The protection skip bit tells us if we have 2 bytes of CRC data at the
// end of the ADTS header
protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the
// end of the sync sequence
// NOTE: frame length includes the size of the header
frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;
sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;
adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS / ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,
// then we have to wait for more data
if (buffer.byteLength - i < frameLength) {
break;
} // Otherwise, deliver the complete AAC frame
this.trigger('data', {
pts: packet.pts + frameNum * adtsFrameDuration,
dts: packet.dts + frameNum * adtsFrameDuration,
sampleCount: sampleCount,
audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,
channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,
samplerate: ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2],
samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,
// assume ISO/IEC 14496-12 AudioSampleEntry default of 16
samplesize: 16,
// data is the frame without it's header
data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)
});
frameNum++;
i += frameLength;
}
if (typeof skip === 'number') {
this.skipWarn_(skip, i);
skip = null;
} // remove processed bytes from the buffer.
buffer = buffer.subarray(i);
};
this.flush = function () {
frameNum = 0;
this.trigger('done');
};
this.reset = function () {
buffer = void 0;
this.trigger('reset');
};
this.endTimeline = function () {
buffer = void 0;
this.trigger('endedtimeline');
};
};
_AdtsStream.prototype = new Stream();
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var Stream = require('../utils/stream.js');
var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
var _AdtsStream;
var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
/*
* Accepts a ElementaryStream and emits data events with parsed
* AAC Audio Frames of the individual packets. Input audio in ADTS
* format is unpacked and re-emitted as AAC frames.
*
* @see http://wiki.multimedia.cx/index.php?title=ADTS
* @see http://wiki.multimedia.cx/?title=Understanding_AAC
*/
_AdtsStream = function AdtsStream(handlePartialSegments) {
var buffer,
frameNum = 0;
_AdtsStream.prototype.init.call(this);
this.skipWarn_ = function (start, end) {
this.trigger('log', {
level: 'warn',
message: "adts skiping bytes " + start + " to " + end + " in frame " + frameNum + " outside syncword"
});
};
this.push = function (packet) {
var i = 0,
frameLength,
protectionSkipBytes,
frameEnd,
oldBuffer,
sampleCount,
adtsFrameDuration;
if (!handlePartialSegments) {
frameNum = 0;
}
if (packet.type !== 'audio') {
// ignore non-audio data
return;
} // Prepend any data in the buffer to the input data so that we can parse
// aac frames the cross a PES packet boundary
if (buffer && buffer.length) {
oldBuffer = buffer;
buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);
buffer.set(oldBuffer);
buffer.set(packet.data, oldBuffer.byteLength);
} else {
buffer = packet.data;
} // unpack any ADTS frames which have been fully received
// for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS
var skip; // We use i + 7 here because we want to be able to parse the entire header.
// If we don't have enough bytes to do that, then we definitely won't have a full frame.
while (i + 7 < buffer.length) {
// Look for the start of an ADTS header..
if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {
if (typeof skip !== 'number') {
skip = i;
} // If a valid header was not found, jump one forward and attempt to
// find a valid ADTS header starting at the next byte
i++;
continue;
}
if (typeof skip === 'number') {
this.skipWarn_(skip, i);
skip = null;
} // The protection skip bit tells us if we have 2 bytes of CRC data at the
// end of the ADTS header
protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the
// end of the sync sequence
// NOTE: frame length includes the size of the header
frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;
sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;
adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS / ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,
// then we have to wait for more data
if (buffer.byteLength - i < frameLength) {
break;
} // Otherwise, deliver the complete AAC frame
this.trigger('data', {
pts: packet.pts + frameNum * adtsFrameDuration,
dts: packet.dts + frameNum * adtsFrameDuration,
sampleCount: sampleCount,
audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,
channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,
samplerate: ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2],
samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,
// assume ISO/IEC 14496-12 AudioSampleEntry default of 16
samplesize: 16,
// data is the frame without it's header
data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)
});
frameNum++;
i += frameLength;
}
if (typeof skip === 'number') {
this.skipWarn_(skip, i);
skip = null;
} // remove processed bytes from the buffer.
buffer = buffer.subarray(i);
};
this.flush = function () {
frameNum = 0;
this.trigger('done');
};
this.reset = function () {
buffer = void 0;
this.trigger('reset');
};
this.endTimeline = function () {
buffer = void 0;
this.trigger('endedtimeline');
};
};
_AdtsStream.prototype = new Stream();
module.exports = _AdtsStream;

1140
node_modules/mux.js/cjs/codecs/h264.js generated vendored
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22
node_modules/mux.js/cjs/codecs/index.js generated vendored
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@ -1,12 +1,12 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = {
Adts: require('./adts'),
h264: require('./h264')
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = {
Adts: require('./adts'),
h264: require('./h264')
};

8
node_modules/mux.js/cjs/constants/audio-properties.js generated vendored
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@ -1,5 +1,5 @@
"use strict";
// constants
var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];
"use strict";
// constants
var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];
module.exports = AUDIO_PROPERTIES;

6
node_modules/mux.js/cjs/constants/video-properties.js generated vendored
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@ -1,4 +1,4 @@
"use strict";
var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];
"use strict";
var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];
module.exports = VIDEO_PROPERTIES;

104
node_modules/mux.js/cjs/data/silence.js generated vendored
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@ -1,53 +1,53 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var highPrefix = [33, 16, 5, 32, 164, 27];
var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];
var zeroFill = function zeroFill(count) {
var a = [];
while (count--) {
a.push(0);
}
return a;
};
var makeTable = function makeTable(metaTable) {
return Object.keys(metaTable).reduce(function (obj, key) {
obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {
return arr.concat(part);
}, []));
return obj;
}, {});
};
var silence;
module.exports = function () {
if (!silence) {
// Frames-of-silence to use for filling in missing AAC frames
var coneOfSilence = {
96000: [highPrefix, [227, 64], zeroFill(154), [56]],
88200: [highPrefix, [231], zeroFill(170), [56]],
64000: [highPrefix, [248, 192], zeroFill(240), [56]],
48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],
44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],
32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],
24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],
16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],
12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],
11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],
8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]
};
silence = makeTable(coneOfSilence);
}
return silence;
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var highPrefix = [33, 16, 5, 32, 164, 27];
var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];
var zeroFill = function zeroFill(count) {
var a = [];
while (count--) {
a.push(0);
}
return a;
};
var makeTable = function makeTable(metaTable) {
return Object.keys(metaTable).reduce(function (obj, key) {
obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {
return arr.concat(part);
}, []));
return obj;
}, {});
};
var silence;
module.exports = function () {
if (!silence) {
// Frames-of-silence to use for filling in missing AAC frames
var coneOfSilence = {
96000: [highPrefix, [227, 64], zeroFill(154), [56]],
88200: [highPrefix, [231], zeroFill(170), [56]],
64000: [highPrefix, [248, 192], zeroFill(240), [56]],
48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],
44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],
32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],
24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],
16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],
12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],
11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],
8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]
};
silence = makeTable(coneOfSilence);
}
return silence;
};

292
node_modules/mux.js/cjs/flv/coalesce-stream.js generated vendored
View file

@ -1,147 +1,147 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var Stream = require('../utils/stream.js');
/**
* The final stage of the transmuxer that emits the flv tags
* for audio, video, and metadata. Also tranlates in time and
* outputs caption data and id3 cues.
*/
var CoalesceStream = function CoalesceStream(options) {
// Number of Tracks per output segment
// If greater than 1, we combine multiple
// tracks into a single segment
this.numberOfTracks = 0;
this.metadataStream = options.metadataStream;
this.videoTags = [];
this.audioTags = [];
this.videoTrack = null;
this.audioTrack = null;
this.pendingCaptions = [];
this.pendingMetadata = [];
this.pendingTracks = 0;
this.processedTracks = 0;
CoalesceStream.prototype.init.call(this); // Take output from multiple
this.push = function (output) {
// buffer incoming captions until the associated video segment
// finishes
if (output.text) {
return this.pendingCaptions.push(output);
} // buffer incoming id3 tags until the final flush
if (output.frames) {
return this.pendingMetadata.push(output);
}
if (output.track.type === 'video') {
this.videoTrack = output.track;
this.videoTags = output.tags;
this.pendingTracks++;
}
if (output.track.type === 'audio') {
this.audioTrack = output.track;
this.audioTags = output.tags;
this.pendingTracks++;
}
};
};
CoalesceStream.prototype = new Stream();
CoalesceStream.prototype.flush = function (flushSource) {
var id3,
caption,
i,
timelineStartPts,
event = {
tags: {},
captions: [],
captionStreams: {},
metadata: []
};
if (this.pendingTracks < this.numberOfTracks) {
if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {
// Return because we haven't received a flush from a data-generating
// portion of the segment (meaning that we have only recieved meta-data
// or captions.)
return;
} else if (this.pendingTracks === 0) {
// In the case where we receive a flush without any data having been
// received we consider it an emitted track for the purposes of coalescing
// `done` events.
// We do this for the case where there is an audio and video track in the
// segment but no audio data. (seen in several playlists with alternate
// audio tracks and no audio present in the main TS segments.)
this.processedTracks++;
if (this.processedTracks < this.numberOfTracks) {
return;
}
}
}
this.processedTracks += this.pendingTracks;
this.pendingTracks = 0;
if (this.processedTracks < this.numberOfTracks) {
return;
}
if (this.videoTrack) {
timelineStartPts = this.videoTrack.timelineStartInfo.pts;
} else if (this.audioTrack) {
timelineStartPts = this.audioTrack.timelineStartInfo.pts;
}
event.tags.videoTags = this.videoTags;
event.tags.audioTags = this.audioTags; // Translate caption PTS times into second offsets into the
// video timeline for the segment, and add track info
for (i = 0; i < this.pendingCaptions.length; i++) {
caption = this.pendingCaptions[i];
caption.startTime = caption.startPts - timelineStartPts;
caption.startTime /= 90e3;
caption.endTime = caption.endPts - timelineStartPts;
caption.endTime /= 90e3;
event.captionStreams[caption.stream] = true;
event.captions.push(caption);
} // Translate ID3 frame PTS times into second offsets into the
// video timeline for the segment
for (i = 0; i < this.pendingMetadata.length; i++) {
id3 = this.pendingMetadata[i];
id3.cueTime = id3.pts - timelineStartPts;
id3.cueTime /= 90e3;
event.metadata.push(id3);
} // We add this to every single emitted segment even though we only need
// it for the first
event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state
this.videoTrack = null;
this.audioTrack = null;
this.videoTags = [];
this.audioTags = [];
this.pendingCaptions.length = 0;
this.pendingMetadata.length = 0;
this.pendingTracks = 0;
this.processedTracks = 0; // Emit the final segment
this.trigger('data', event);
this.trigger('done');
};
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var Stream = require('../utils/stream.js');
/**
* The final stage of the transmuxer that emits the flv tags
* for audio, video, and metadata. Also tranlates in time and
* outputs caption data and id3 cues.
*/
var CoalesceStream = function CoalesceStream(options) {
// Number of Tracks per output segment
// If greater than 1, we combine multiple
// tracks into a single segment
this.numberOfTracks = 0;
this.metadataStream = options.metadataStream;
this.videoTags = [];
this.audioTags = [];
this.videoTrack = null;
this.audioTrack = null;
this.pendingCaptions = [];
this.pendingMetadata = [];
this.pendingTracks = 0;
this.processedTracks = 0;
CoalesceStream.prototype.init.call(this); // Take output from multiple
this.push = function (output) {
// buffer incoming captions until the associated video segment
// finishes
if (output.text) {
return this.pendingCaptions.push(output);
} // buffer incoming id3 tags until the final flush
if (output.frames) {
return this.pendingMetadata.push(output);
}
if (output.track.type === 'video') {
this.videoTrack = output.track;
this.videoTags = output.tags;
this.pendingTracks++;
}
if (output.track.type === 'audio') {
this.audioTrack = output.track;
this.audioTags = output.tags;
this.pendingTracks++;
}
};
};
CoalesceStream.prototype = new Stream();
CoalesceStream.prototype.flush = function (flushSource) {
var id3,
caption,
i,
timelineStartPts,
event = {
tags: {},
captions: [],
captionStreams: {},
metadata: []
};
if (this.pendingTracks < this.numberOfTracks) {
if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {
// Return because we haven't received a flush from a data-generating
// portion of the segment (meaning that we have only recieved meta-data
// or captions.)
return;
} else if (this.pendingTracks === 0) {
// In the case where we receive a flush without any data having been
// received we consider it an emitted track for the purposes of coalescing
// `done` events.
// We do this for the case where there is an audio and video track in the
// segment but no audio data. (seen in several playlists with alternate
// audio tracks and no audio present in the main TS segments.)
this.processedTracks++;
if (this.processedTracks < this.numberOfTracks) {
return;
}
}
}
this.processedTracks += this.pendingTracks;
this.pendingTracks = 0;
if (this.processedTracks < this.numberOfTracks) {
return;
}
if (this.videoTrack) {
timelineStartPts = this.videoTrack.timelineStartInfo.pts;
} else if (this.audioTrack) {
timelineStartPts = this.audioTrack.timelineStartInfo.pts;
}
event.tags.videoTags = this.videoTags;
event.tags.audioTags = this.audioTags; // Translate caption PTS times into second offsets into the
// video timeline for the segment, and add track info
for (i = 0; i < this.pendingCaptions.length; i++) {
caption = this.pendingCaptions[i];
caption.startTime = caption.startPts - timelineStartPts;
caption.startTime /= 90e3;
caption.endTime = caption.endPts - timelineStartPts;
caption.endTime /= 90e3;
event.captionStreams[caption.stream] = true;
event.captions.push(caption);
} // Translate ID3 frame PTS times into second offsets into the
// video timeline for the segment
for (i = 0; i < this.pendingMetadata.length; i++) {
id3 = this.pendingMetadata[i];
id3.cueTime = id3.pts - timelineStartPts;
id3.cueTime /= 90e3;
event.metadata.push(id3);
} // We add this to every single emitted segment even though we only need
// it for the first
event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state
this.videoTrack = null;
this.audioTrack = null;
this.videoTags = [];
this.audioTags = [];
this.pendingCaptions.length = 0;
this.pendingMetadata.length = 0;
this.pendingTracks = 0;
this.processedTracks = 0; // Emit the final segment
this.trigger('data', event);
this.trigger('done');
};
module.exports = CoalesceStream;

122
node_modules/mux.js/cjs/flv/flv-header.js generated vendored
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@ -1,62 +1,62 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var FlvTag = require('./flv-tag.js'); // For information on the FLV format, see
// http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf.
// Technically, this function returns the header and a metadata FLV tag
// if duration is greater than zero
// duration in seconds
// @return {object} the bytes of the FLV header as a Uint8Array
var getFlvHeader = function getFlvHeader(duration, audio, video) {
// :ByteArray {
var headBytes = new Uint8Array(3 + 1 + 1 + 4),
head = new DataView(headBytes.buffer),
metadata,
result,
metadataLength; // default arguments
duration = duration || 0;
audio = audio === undefined ? true : audio;
video = video === undefined ? true : video; // signature
head.setUint8(0, 0x46); // 'F'
head.setUint8(1, 0x4c); // 'L'
head.setUint8(2, 0x56); // 'V'
// version
head.setUint8(3, 0x01); // flags
head.setUint8(4, (audio ? 0x04 : 0x00) | (video ? 0x01 : 0x00)); // data offset, should be 9 for FLV v1
head.setUint32(5, headBytes.byteLength); // init the first FLV tag
if (duration <= 0) {
// no duration available so just write the first field of the first
// FLV tag
result = new Uint8Array(headBytes.byteLength + 4);
result.set(headBytes);
result.set([0, 0, 0, 0], headBytes.byteLength);
return result;
} // write out the duration metadata tag
metadata = new FlvTag(FlvTag.METADATA_TAG);
metadata.pts = metadata.dts = 0;
metadata.writeMetaDataDouble('duration', duration);
metadataLength = metadata.finalize().length;
result = new Uint8Array(headBytes.byteLength + metadataLength);
result.set(headBytes);
result.set(head.byteLength, metadataLength);
return result;
};
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var FlvTag = require('./flv-tag.js'); // For information on the FLV format, see
// http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf.
// Technically, this function returns the header and a metadata FLV tag
// if duration is greater than zero
// duration in seconds
// @return {object} the bytes of the FLV header as a Uint8Array
var getFlvHeader = function getFlvHeader(duration, audio, video) {
// :ByteArray {
var headBytes = new Uint8Array(3 + 1 + 1 + 4),
head = new DataView(headBytes.buffer),
metadata,
result,
metadataLength; // default arguments
duration = duration || 0;
audio = audio === undefined ? true : audio;
video = video === undefined ? true : video; // signature
head.setUint8(0, 0x46); // 'F'
head.setUint8(1, 0x4c); // 'L'
head.setUint8(2, 0x56); // 'V'
// version
head.setUint8(3, 0x01); // flags
head.setUint8(4, (audio ? 0x04 : 0x00) | (video ? 0x01 : 0x00)); // data offset, should be 9 for FLV v1
head.setUint32(5, headBytes.byteLength); // init the first FLV tag
if (duration <= 0) {
// no duration available so just write the first field of the first
// FLV tag
result = new Uint8Array(headBytes.byteLength + 4);
result.set(headBytes);
result.set([0, 0, 0, 0], headBytes.byteLength);
return result;
} // write out the duration metadata tag
metadata = new FlvTag(FlvTag.METADATA_TAG);
metadata.pts = metadata.dts = 0;
metadata.writeMetaDataDouble('duration', duration);
metadataLength = metadata.finalize().length;
result = new Uint8Array(headBytes.byteLength + metadataLength);
result.set(headBytes);
result.set(head.byteLength, metadataLength);
return result;
};
module.exports = getFlvHeader;

742
node_modules/mux.js/cjs/flv/flv-tag.js generated vendored
View file

@ -1,372 +1,372 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* An object that stores the bytes of an FLV tag and methods for
* querying and manipulating that data.
* @see http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf
*/
'use strict';
var _FlvTag; // (type:uint, extraData:Boolean = false) extends ByteArray
_FlvTag = function FlvTag(type, extraData) {
var // Counter if this is a metadata tag, nal start marker if this is a video
// tag. unused if this is an audio tag
adHoc = 0,
// :uint
// The default size is 16kb but this is not enough to hold iframe
// data and the resizing algorithm costs a bit so we create a larger
// starting buffer for video tags
bufferStartSize = 16384,
// checks whether the FLV tag has enough capacity to accept the proposed
// write and re-allocates the internal buffers if necessary
prepareWrite = function prepareWrite(flv, count) {
var bytes,
minLength = flv.position + count;
if (minLength < flv.bytes.byteLength) {
// there's enough capacity so do nothing
return;
} // allocate a new buffer and copy over the data that will not be modified
bytes = new Uint8Array(minLength * 2);
bytes.set(flv.bytes.subarray(0, flv.position), 0);
flv.bytes = bytes;
flv.view = new DataView(flv.bytes.buffer);
},
// commonly used metadata properties
widthBytes = _FlvTag.widthBytes || new Uint8Array('width'.length),
heightBytes = _FlvTag.heightBytes || new Uint8Array('height'.length),
videocodecidBytes = _FlvTag.videocodecidBytes || new Uint8Array('videocodecid'.length),
i;
if (!_FlvTag.widthBytes) {
// calculating the bytes of common metadata names ahead of time makes the
// corresponding writes faster because we don't have to loop over the
// characters
// re-test with test/perf.html if you're planning on changing this
for (i = 0; i < 'width'.length; i++) {
widthBytes[i] = 'width'.charCodeAt(i);
}
for (i = 0; i < 'height'.length; i++) {
heightBytes[i] = 'height'.charCodeAt(i);
}
for (i = 0; i < 'videocodecid'.length; i++) {
videocodecidBytes[i] = 'videocodecid'.charCodeAt(i);
}
_FlvTag.widthBytes = widthBytes;
_FlvTag.heightBytes = heightBytes;
_FlvTag.videocodecidBytes = videocodecidBytes;
}
this.keyFrame = false; // :Boolean
switch (type) {
case _FlvTag.VIDEO_TAG:
this.length = 16; // Start the buffer at 256k
bufferStartSize *= 6;
break;
case _FlvTag.AUDIO_TAG:
this.length = 13;
this.keyFrame = true;
break;
case _FlvTag.METADATA_TAG:
this.length = 29;
this.keyFrame = true;
break;
default:
throw new Error('Unknown FLV tag type');
}
this.bytes = new Uint8Array(bufferStartSize);
this.view = new DataView(this.bytes.buffer);
this.bytes[0] = type;
this.position = this.length;
this.keyFrame = extraData; // Defaults to false
// presentation timestamp
this.pts = 0; // decoder timestamp
this.dts = 0; // ByteArray#writeBytes(bytes:ByteArray, offset:uint = 0, length:uint = 0)
this.writeBytes = function (bytes, offset, length) {
var start = offset || 0,
end;
length = length || bytes.byteLength;
end = start + length;
prepareWrite(this, length);
this.bytes.set(bytes.subarray(start, end), this.position);
this.position += length;
this.length = Math.max(this.length, this.position);
}; // ByteArray#writeByte(value:int):void
this.writeByte = function (byte) {
prepareWrite(this, 1);
this.bytes[this.position] = byte;
this.position++;
this.length = Math.max(this.length, this.position);
}; // ByteArray#writeShort(value:int):void
this.writeShort = function (short) {
prepareWrite(this, 2);
this.view.setUint16(this.position, short);
this.position += 2;
this.length = Math.max(this.length, this.position);
}; // Negative index into array
// (pos:uint):int
this.negIndex = function (pos) {
return this.bytes[this.length - pos];
}; // The functions below ONLY work when this[0] == VIDEO_TAG.
// We are not going to check for that because we dont want the overhead
// (nal:ByteArray = null):int
this.nalUnitSize = function () {
if (adHoc === 0) {
return 0;
}
return this.length - (adHoc + 4);
};
this.startNalUnit = function () {
// remember position and add 4 bytes
if (adHoc > 0) {
throw new Error('Attempted to create new NAL wihout closing the old one');
} // reserve 4 bytes for nal unit size
adHoc = this.length;
this.length += 4;
this.position = this.length;
}; // (nal:ByteArray = null):void
this.endNalUnit = function (nalContainer) {
var nalStart, // :uint
nalLength; // :uint
// Rewind to the marker and write the size
if (this.length === adHoc + 4) {
// we started a nal unit, but didnt write one, so roll back the 4 byte size value
this.length -= 4;
} else if (adHoc > 0) {
nalStart = adHoc + 4;
nalLength = this.length - nalStart;
this.position = adHoc;
this.view.setUint32(this.position, nalLength);
this.position = this.length;
if (nalContainer) {
// Add the tag to the NAL unit
nalContainer.push(this.bytes.subarray(nalStart, nalStart + nalLength));
}
}
adHoc = 0;
};
/**
* Write out a 64-bit floating point valued metadata property. This method is
* called frequently during a typical parse and needs to be fast.
*/
// (key:String, val:Number):void
this.writeMetaDataDouble = function (key, val) {
var i;
prepareWrite(this, 2 + key.length + 9); // write size of property name
this.view.setUint16(this.position, key.length);
this.position += 2; // this next part looks terrible but it improves parser throughput by
// 10kB/s in my testing
// write property name
if (key === 'width') {
this.bytes.set(widthBytes, this.position);
this.position += 5;
} else if (key === 'height') {
this.bytes.set(heightBytes, this.position);
this.position += 6;
} else if (key === 'videocodecid') {
this.bytes.set(videocodecidBytes, this.position);
this.position += 12;
} else {
for (i = 0; i < key.length; i++) {
this.bytes[this.position] = key.charCodeAt(i);
this.position++;
}
} // skip null byte
this.position++; // write property value
this.view.setFloat64(this.position, val);
this.position += 8; // update flv tag length
this.length = Math.max(this.length, this.position);
++adHoc;
}; // (key:String, val:Boolean):void
this.writeMetaDataBoolean = function (key, val) {
var i;
prepareWrite(this, 2);
this.view.setUint16(this.position, key.length);
this.position += 2;
for (i = 0; i < key.length; i++) {
// if key.charCodeAt(i) >= 255, handle error
prepareWrite(this, 1);
this.bytes[this.position] = key.charCodeAt(i);
this.position++;
}
prepareWrite(this, 2);
this.view.setUint8(this.position, 0x01);
this.position++;
this.view.setUint8(this.position, val ? 0x01 : 0x00);
this.position++;
this.length = Math.max(this.length, this.position);
++adHoc;
}; // ():ByteArray
this.finalize = function () {
var dtsDelta, // :int
len; // :int
switch (this.bytes[0]) {
// Video Data
case _FlvTag.VIDEO_TAG:
// We only support AVC, 1 = key frame (for AVC, a seekable
// frame), 2 = inter frame (for AVC, a non-seekable frame)
this.bytes[11] = (this.keyFrame || extraData ? 0x10 : 0x20) | 0x07;
this.bytes[12] = extraData ? 0x00 : 0x01;
dtsDelta = this.pts - this.dts;
this.bytes[13] = (dtsDelta & 0x00FF0000) >>> 16;
this.bytes[14] = (dtsDelta & 0x0000FF00) >>> 8;
this.bytes[15] = (dtsDelta & 0x000000FF) >>> 0;
break;
case _FlvTag.AUDIO_TAG:
this.bytes[11] = 0xAF; // 44 kHz, 16-bit stereo
this.bytes[12] = extraData ? 0x00 : 0x01;
break;
case _FlvTag.METADATA_TAG:
this.position = 11;
this.view.setUint8(this.position, 0x02); // String type
this.position++;
this.view.setUint16(this.position, 0x0A); // 10 Bytes
this.position += 2; // set "onMetaData"
this.bytes.set([0x6f, 0x6e, 0x4d, 0x65, 0x74, 0x61, 0x44, 0x61, 0x74, 0x61], this.position);
this.position += 10;
this.bytes[this.position] = 0x08; // Array type
this.position++;
this.view.setUint32(this.position, adHoc);
this.position = this.length;
this.bytes.set([0, 0, 9], this.position);
this.position += 3; // End Data Tag
this.length = this.position;
break;
}
len = this.length - 11; // write the DataSize field
this.bytes[1] = (len & 0x00FF0000) >>> 16;
this.bytes[2] = (len & 0x0000FF00) >>> 8;
this.bytes[3] = (len & 0x000000FF) >>> 0; // write the Timestamp
this.bytes[4] = (this.dts & 0x00FF0000) >>> 16;
this.bytes[5] = (this.dts & 0x0000FF00) >>> 8;
this.bytes[6] = (this.dts & 0x000000FF) >>> 0;
this.bytes[7] = (this.dts & 0xFF000000) >>> 24; // write the StreamID
this.bytes[8] = 0;
this.bytes[9] = 0;
this.bytes[10] = 0; // Sometimes we're at the end of the view and have one slot to write a
// uint32, so, prepareWrite of count 4, since, view is uint8
prepareWrite(this, 4);
this.view.setUint32(this.length, this.length);
this.length += 4;
this.position += 4; // trim down the byte buffer to what is actually being used
this.bytes = this.bytes.subarray(0, this.length);
this.frameTime = _FlvTag.frameTime(this.bytes); // if bytes.bytelength isn't equal to this.length, handle error
return this;
};
};
_FlvTag.AUDIO_TAG = 0x08; // == 8, :uint
_FlvTag.VIDEO_TAG = 0x09; // == 9, :uint
_FlvTag.METADATA_TAG = 0x12; // == 18, :uint
// (tag:ByteArray):Boolean {
_FlvTag.isAudioFrame = function (tag) {
return _FlvTag.AUDIO_TAG === tag[0];
}; // (tag:ByteArray):Boolean {
_FlvTag.isVideoFrame = function (tag) {
return _FlvTag.VIDEO_TAG === tag[0];
}; // (tag:ByteArray):Boolean {
_FlvTag.isMetaData = function (tag) {
return _FlvTag.METADATA_TAG === tag[0];
}; // (tag:ByteArray):Boolean {
_FlvTag.isKeyFrame = function (tag) {
if (_FlvTag.isVideoFrame(tag)) {
return tag[11] === 0x17;
}
if (_FlvTag.isAudioFrame(tag)) {
return true;
}
if (_FlvTag.isMetaData(tag)) {
return true;
}
return false;
}; // (tag:ByteArray):uint {
_FlvTag.frameTime = function (tag) {
var pts = tag[4] << 16; // :uint
pts |= tag[5] << 8;
pts |= tag[6] << 0;
pts |= tag[7] << 24;
return pts;
};
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* An object that stores the bytes of an FLV tag and methods for
* querying and manipulating that data.
* @see http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf
*/
'use strict';
var _FlvTag; // (type:uint, extraData:Boolean = false) extends ByteArray
_FlvTag = function FlvTag(type, extraData) {
var // Counter if this is a metadata tag, nal start marker if this is a video
// tag. unused if this is an audio tag
adHoc = 0,
// :uint
// The default size is 16kb but this is not enough to hold iframe
// data and the resizing algorithm costs a bit so we create a larger
// starting buffer for video tags
bufferStartSize = 16384,
// checks whether the FLV tag has enough capacity to accept the proposed
// write and re-allocates the internal buffers if necessary
prepareWrite = function prepareWrite(flv, count) {
var bytes,
minLength = flv.position + count;
if (minLength < flv.bytes.byteLength) {
// there's enough capacity so do nothing
return;
} // allocate a new buffer and copy over the data that will not be modified
bytes = new Uint8Array(minLength * 2);
bytes.set(flv.bytes.subarray(0, flv.position), 0);
flv.bytes = bytes;
flv.view = new DataView(flv.bytes.buffer);
},
// commonly used metadata properties
widthBytes = _FlvTag.widthBytes || new Uint8Array('width'.length),
heightBytes = _FlvTag.heightBytes || new Uint8Array('height'.length),
videocodecidBytes = _FlvTag.videocodecidBytes || new Uint8Array('videocodecid'.length),
i;
if (!_FlvTag.widthBytes) {
// calculating the bytes of common metadata names ahead of time makes the
// corresponding writes faster because we don't have to loop over the
// characters
// re-test with test/perf.html if you're planning on changing this
for (i = 0; i < 'width'.length; i++) {
widthBytes[i] = 'width'.charCodeAt(i);
}
for (i = 0; i < 'height'.length; i++) {
heightBytes[i] = 'height'.charCodeAt(i);
}
for (i = 0; i < 'videocodecid'.length; i++) {
videocodecidBytes[i] = 'videocodecid'.charCodeAt(i);
}
_FlvTag.widthBytes = widthBytes;
_FlvTag.heightBytes = heightBytes;
_FlvTag.videocodecidBytes = videocodecidBytes;
}
this.keyFrame = false; // :Boolean
switch (type) {
case _FlvTag.VIDEO_TAG:
this.length = 16; // Start the buffer at 256k
bufferStartSize *= 6;
break;
case _FlvTag.AUDIO_TAG:
this.length = 13;
this.keyFrame = true;
break;
case _FlvTag.METADATA_TAG:
this.length = 29;
this.keyFrame = true;
break;
default:
throw new Error('Unknown FLV tag type');
}
this.bytes = new Uint8Array(bufferStartSize);
this.view = new DataView(this.bytes.buffer);
this.bytes[0] = type;
this.position = this.length;
this.keyFrame = extraData; // Defaults to false
// presentation timestamp
this.pts = 0; // decoder timestamp
this.dts = 0; // ByteArray#writeBytes(bytes:ByteArray, offset:uint = 0, length:uint = 0)
this.writeBytes = function (bytes, offset, length) {
var start = offset || 0,
end;
length = length || bytes.byteLength;
end = start + length;
prepareWrite(this, length);
this.bytes.set(bytes.subarray(start, end), this.position);
this.position += length;
this.length = Math.max(this.length, this.position);
}; // ByteArray#writeByte(value:int):void
this.writeByte = function (byte) {
prepareWrite(this, 1);
this.bytes[this.position] = byte;
this.position++;
this.length = Math.max(this.length, this.position);
}; // ByteArray#writeShort(value:int):void
this.writeShort = function (short) {
prepareWrite(this, 2);
this.view.setUint16(this.position, short);
this.position += 2;
this.length = Math.max(this.length, this.position);
}; // Negative index into array
// (pos:uint):int
this.negIndex = function (pos) {
return this.bytes[this.length - pos];
}; // The functions below ONLY work when this[0] == VIDEO_TAG.
// We are not going to check for that because we dont want the overhead
// (nal:ByteArray = null):int
this.nalUnitSize = function () {
if (adHoc === 0) {
return 0;
}
return this.length - (adHoc + 4);
};
this.startNalUnit = function () {
// remember position and add 4 bytes
if (adHoc > 0) {
throw new Error('Attempted to create new NAL wihout closing the old one');
} // reserve 4 bytes for nal unit size
adHoc = this.length;
this.length += 4;
this.position = this.length;
}; // (nal:ByteArray = null):void
this.endNalUnit = function (nalContainer) {
var nalStart, // :uint
nalLength; // :uint
// Rewind to the marker and write the size
if (this.length === adHoc + 4) {
// we started a nal unit, but didnt write one, so roll back the 4 byte size value
this.length -= 4;
} else if (adHoc > 0) {
nalStart = adHoc + 4;
nalLength = this.length - nalStart;
this.position = adHoc;
this.view.setUint32(this.position, nalLength);
this.position = this.length;
if (nalContainer) {
// Add the tag to the NAL unit
nalContainer.push(this.bytes.subarray(nalStart, nalStart + nalLength));
}
}
adHoc = 0;
};
/**
* Write out a 64-bit floating point valued metadata property. This method is
* called frequently during a typical parse and needs to be fast.
*/
// (key:String, val:Number):void
this.writeMetaDataDouble = function (key, val) {
var i;
prepareWrite(this, 2 + key.length + 9); // write size of property name
this.view.setUint16(this.position, key.length);
this.position += 2; // this next part looks terrible but it improves parser throughput by
// 10kB/s in my testing
// write property name
if (key === 'width') {
this.bytes.set(widthBytes, this.position);
this.position += 5;
} else if (key === 'height') {
this.bytes.set(heightBytes, this.position);
this.position += 6;
} else if (key === 'videocodecid') {
this.bytes.set(videocodecidBytes, this.position);
this.position += 12;
} else {
for (i = 0; i < key.length; i++) {
this.bytes[this.position] = key.charCodeAt(i);
this.position++;
}
} // skip null byte
this.position++; // write property value
this.view.setFloat64(this.position, val);
this.position += 8; // update flv tag length
this.length = Math.max(this.length, this.position);
++adHoc;
}; // (key:String, val:Boolean):void
this.writeMetaDataBoolean = function (key, val) {
var i;
prepareWrite(this, 2);
this.view.setUint16(this.position, key.length);
this.position += 2;
for (i = 0; i < key.length; i++) {
// if key.charCodeAt(i) >= 255, handle error
prepareWrite(this, 1);
this.bytes[this.position] = key.charCodeAt(i);
this.position++;
}
prepareWrite(this, 2);
this.view.setUint8(this.position, 0x01);
this.position++;
this.view.setUint8(this.position, val ? 0x01 : 0x00);
this.position++;
this.length = Math.max(this.length, this.position);
++adHoc;
}; // ():ByteArray
this.finalize = function () {
var dtsDelta, // :int
len; // :int
switch (this.bytes[0]) {
// Video Data
case _FlvTag.VIDEO_TAG:
// We only support AVC, 1 = key frame (for AVC, a seekable
// frame), 2 = inter frame (for AVC, a non-seekable frame)
this.bytes[11] = (this.keyFrame || extraData ? 0x10 : 0x20) | 0x07;
this.bytes[12] = extraData ? 0x00 : 0x01;
dtsDelta = this.pts - this.dts;
this.bytes[13] = (dtsDelta & 0x00FF0000) >>> 16;
this.bytes[14] = (dtsDelta & 0x0000FF00) >>> 8;
this.bytes[15] = (dtsDelta & 0x000000FF) >>> 0;
break;
case _FlvTag.AUDIO_TAG:
this.bytes[11] = 0xAF; // 44 kHz, 16-bit stereo
this.bytes[12] = extraData ? 0x00 : 0x01;
break;
case _FlvTag.METADATA_TAG:
this.position = 11;
this.view.setUint8(this.position, 0x02); // String type
this.position++;
this.view.setUint16(this.position, 0x0A); // 10 Bytes
this.position += 2; // set "onMetaData"
this.bytes.set([0x6f, 0x6e, 0x4d, 0x65, 0x74, 0x61, 0x44, 0x61, 0x74, 0x61], this.position);
this.position += 10;
this.bytes[this.position] = 0x08; // Array type
this.position++;
this.view.setUint32(this.position, adHoc);
this.position = this.length;
this.bytes.set([0, 0, 9], this.position);
this.position += 3; // End Data Tag
this.length = this.position;
break;
}
len = this.length - 11; // write the DataSize field
this.bytes[1] = (len & 0x00FF0000) >>> 16;
this.bytes[2] = (len & 0x0000FF00) >>> 8;
this.bytes[3] = (len & 0x000000FF) >>> 0; // write the Timestamp
this.bytes[4] = (this.dts & 0x00FF0000) >>> 16;
this.bytes[5] = (this.dts & 0x0000FF00) >>> 8;
this.bytes[6] = (this.dts & 0x000000FF) >>> 0;
this.bytes[7] = (this.dts & 0xFF000000) >>> 24; // write the StreamID
this.bytes[8] = 0;
this.bytes[9] = 0;
this.bytes[10] = 0; // Sometimes we're at the end of the view and have one slot to write a
// uint32, so, prepareWrite of count 4, since, view is uint8
prepareWrite(this, 4);
this.view.setUint32(this.length, this.length);
this.length += 4;
this.position += 4; // trim down the byte buffer to what is actually being used
this.bytes = this.bytes.subarray(0, this.length);
this.frameTime = _FlvTag.frameTime(this.bytes); // if bytes.bytelength isn't equal to this.length, handle error
return this;
};
};
_FlvTag.AUDIO_TAG = 0x08; // == 8, :uint
_FlvTag.VIDEO_TAG = 0x09; // == 9, :uint
_FlvTag.METADATA_TAG = 0x12; // == 18, :uint
// (tag:ByteArray):Boolean {
_FlvTag.isAudioFrame = function (tag) {
return _FlvTag.AUDIO_TAG === tag[0];
}; // (tag:ByteArray):Boolean {
_FlvTag.isVideoFrame = function (tag) {
return _FlvTag.VIDEO_TAG === tag[0];
}; // (tag:ByteArray):Boolean {
_FlvTag.isMetaData = function (tag) {
return _FlvTag.METADATA_TAG === tag[0];
}; // (tag:ByteArray):Boolean {
_FlvTag.isKeyFrame = function (tag) {
if (_FlvTag.isVideoFrame(tag)) {
return tag[11] === 0x17;
}
if (_FlvTag.isAudioFrame(tag)) {
return true;
}
if (_FlvTag.isMetaData(tag)) {
return true;
}
return false;
}; // (tag:ByteArray):uint {
_FlvTag.frameTime = function (tag) {
var pts = tag[4] << 16; // :uint
pts |= tag[5] << 8;
pts |= tag[6] << 0;
pts |= tag[7] << 24;
return pts;
};
module.exports = _FlvTag;

24
node_modules/mux.js/cjs/flv/index.js generated vendored
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@ -1,13 +1,13 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = {
tag: require('./flv-tag'),
Transmuxer: require('./transmuxer'),
getFlvHeader: require('./flv-header')
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = {
tag: require('./flv-tag'),
Transmuxer: require('./transmuxer'),
getFlvHeader: require('./flv-header')
};

58
node_modules/mux.js/cjs/flv/tag-list.js generated vendored
View file

@ -1,30 +1,30 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var TagList = function TagList() {
var self = this;
this.list = [];
this.push = function (tag) {
this.list.push({
bytes: tag.bytes,
dts: tag.dts,
pts: tag.pts,
keyFrame: tag.keyFrame,
metaDataTag: tag.metaDataTag
});
};
Object.defineProperty(this, 'length', {
get: function get() {
return self.list.length;
}
});
};
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var TagList = function TagList() {
var self = this;
this.list = [];
this.push = function (tag) {
this.list.push({
bytes: tag.bytes,
dts: tag.dts,
pts: tag.pts,
keyFrame: tag.keyFrame,
metaDataTag: tag.metaDataTag
});
};
Object.defineProperty(this, 'length', {
get: function get() {
return self.list.length;
}
});
};
module.exports = TagList;

848
node_modules/mux.js/cjs/flv/transmuxer.js generated vendored
View file

@ -1,425 +1,425 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var Stream = require('../utils/stream.js');
var FlvTag = require('./flv-tag.js');
var m2ts = require('../m2ts/m2ts.js');
var AdtsStream = require('../codecs/adts.js');
var H264Stream = require('../codecs/h264').H264Stream;
var CoalesceStream = require('./coalesce-stream.js');
var TagList = require('./tag-list.js');
var _Transmuxer, _VideoSegmentStream, _AudioSegmentStream, collectTimelineInfo, metaDataTag, extraDataTag;
/**
* Store information about the start and end of the tracka and the
* duration for each frame/sample we process in order to calculate
* the baseMediaDecodeTime
*/
collectTimelineInfo = function collectTimelineInfo(track, data) {
if (typeof data.pts === 'number') {
if (track.timelineStartInfo.pts === undefined) {
track.timelineStartInfo.pts = data.pts;
} else {
track.timelineStartInfo.pts = Math.min(track.timelineStartInfo.pts, data.pts);
}
}
if (typeof data.dts === 'number') {
if (track.timelineStartInfo.dts === undefined) {
track.timelineStartInfo.dts = data.dts;
} else {
track.timelineStartInfo.dts = Math.min(track.timelineStartInfo.dts, data.dts);
}
}
};
metaDataTag = function metaDataTag(track, pts) {
var tag = new FlvTag(FlvTag.METADATA_TAG); // :FlvTag
tag.dts = pts;
tag.pts = pts;
tag.writeMetaDataDouble('videocodecid', 7);
tag.writeMetaDataDouble('width', track.width);
tag.writeMetaDataDouble('height', track.height);
return tag;
};
extraDataTag = function extraDataTag(track, pts) {
var i,
tag = new FlvTag(FlvTag.VIDEO_TAG, true);
tag.dts = pts;
tag.pts = pts;
tag.writeByte(0x01); // version
tag.writeByte(track.profileIdc); // profile
tag.writeByte(track.profileCompatibility); // compatibility
tag.writeByte(track.levelIdc); // level
tag.writeByte(0xFC | 0x03); // reserved (6 bits), NULA length size - 1 (2 bits)
tag.writeByte(0xE0 | 0x01); // reserved (3 bits), num of SPS (5 bits)
tag.writeShort(track.sps[0].length); // data of SPS
tag.writeBytes(track.sps[0]); // SPS
tag.writeByte(track.pps.length); // num of PPS (will there ever be more that 1 PPS?)
for (i = 0; i < track.pps.length; ++i) {
tag.writeShort(track.pps[i].length); // 2 bytes for length of PPS
tag.writeBytes(track.pps[i]); // data of PPS
}
return tag;
};
/**
* Constructs a single-track, media segment from AAC data
* events. The output of this stream can be fed to flash.
*/
_AudioSegmentStream = function AudioSegmentStream(track) {
var adtsFrames = [],
videoKeyFrames = [],
oldExtraData;
_AudioSegmentStream.prototype.init.call(this);
this.push = function (data) {
collectTimelineInfo(track, data);
if (track) {
track.audioobjecttype = data.audioobjecttype;
track.channelcount = data.channelcount;
track.samplerate = data.samplerate;
track.samplingfrequencyindex = data.samplingfrequencyindex;
track.samplesize = data.samplesize;
track.extraData = track.audioobjecttype << 11 | track.samplingfrequencyindex << 7 | track.channelcount << 3;
}
data.pts = Math.round(data.pts / 90);
data.dts = Math.round(data.dts / 90); // buffer audio data until end() is called
adtsFrames.push(data);
};
this.flush = function () {
var currentFrame,
adtsFrame,
lastMetaPts,
tags = new TagList(); // return early if no audio data has been observed
if (adtsFrames.length === 0) {
this.trigger('done', 'AudioSegmentStream');
return;
}
lastMetaPts = -Infinity;
while (adtsFrames.length) {
currentFrame = adtsFrames.shift(); // write out a metadata frame at every video key frame
if (videoKeyFrames.length && currentFrame.pts >= videoKeyFrames[0]) {
lastMetaPts = videoKeyFrames.shift();
this.writeMetaDataTags(tags, lastMetaPts);
} // also write out metadata tags every 1 second so that the decoder
// is re-initialized quickly after seeking into a different
// audio configuration.
if (track.extraData !== oldExtraData || currentFrame.pts - lastMetaPts >= 1000) {
this.writeMetaDataTags(tags, currentFrame.pts);
oldExtraData = track.extraData;
lastMetaPts = currentFrame.pts;
}
adtsFrame = new FlvTag(FlvTag.AUDIO_TAG);
adtsFrame.pts = currentFrame.pts;
adtsFrame.dts = currentFrame.dts;
adtsFrame.writeBytes(currentFrame.data);
tags.push(adtsFrame.finalize());
}
videoKeyFrames.length = 0;
oldExtraData = null;
this.trigger('data', {
track: track,
tags: tags.list
});
this.trigger('done', 'AudioSegmentStream');
};
this.writeMetaDataTags = function (tags, pts) {
var adtsFrame;
adtsFrame = new FlvTag(FlvTag.METADATA_TAG); // For audio, DTS is always the same as PTS. We want to set the DTS
// however so we can compare with video DTS to determine approximate
// packet order
adtsFrame.pts = pts;
adtsFrame.dts = pts; // AAC is always 10
adtsFrame.writeMetaDataDouble('audiocodecid', 10);
adtsFrame.writeMetaDataBoolean('stereo', track.channelcount === 2);
adtsFrame.writeMetaDataDouble('audiosamplerate', track.samplerate); // Is AAC always 16 bit?
adtsFrame.writeMetaDataDouble('audiosamplesize', 16);
tags.push(adtsFrame.finalize());
adtsFrame = new FlvTag(FlvTag.AUDIO_TAG, true); // For audio, DTS is always the same as PTS. We want to set the DTS
// however so we can compare with video DTS to determine approximate
// packet order
adtsFrame.pts = pts;
adtsFrame.dts = pts;
adtsFrame.view.setUint16(adtsFrame.position, track.extraData);
adtsFrame.position += 2;
adtsFrame.length = Math.max(adtsFrame.length, adtsFrame.position);
tags.push(adtsFrame.finalize());
};
this.onVideoKeyFrame = function (pts) {
videoKeyFrames.push(pts);
};
};
_AudioSegmentStream.prototype = new Stream();
/**
* Store FlvTags for the h264 stream
* @param track {object} track metadata configuration
*/
_VideoSegmentStream = function VideoSegmentStream(track) {
var nalUnits = [],
config,
h264Frame;
_VideoSegmentStream.prototype.init.call(this);
this.finishFrame = function (tags, frame) {
if (!frame) {
return;
} // Check if keyframe and the length of tags.
// This makes sure we write metadata on the first frame of a segment.
if (config && track && track.newMetadata && (frame.keyFrame || tags.length === 0)) {
// Push extra data on every IDR frame in case we did a stream change + seek
var metaTag = metaDataTag(config, frame.dts).finalize();
var extraTag = extraDataTag(track, frame.dts).finalize();
metaTag.metaDataTag = extraTag.metaDataTag = true;
tags.push(metaTag);
tags.push(extraTag);
track.newMetadata = false;
this.trigger('keyframe', frame.dts);
}
frame.endNalUnit();
tags.push(frame.finalize());
h264Frame = null;
};
this.push = function (data) {
collectTimelineInfo(track, data);
data.pts = Math.round(data.pts / 90);
data.dts = Math.round(data.dts / 90); // buffer video until flush() is called
nalUnits.push(data);
};
this.flush = function () {
var currentNal,
tags = new TagList(); // Throw away nalUnits at the start of the byte stream until we find
// the first AUD
while (nalUnits.length) {
if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {
break;
}
nalUnits.shift();
} // return early if no video data has been observed
if (nalUnits.length === 0) {
this.trigger('done', 'VideoSegmentStream');
return;
}
while (nalUnits.length) {
currentNal = nalUnits.shift(); // record the track config
if (currentNal.nalUnitType === 'seq_parameter_set_rbsp') {
track.newMetadata = true;
config = currentNal.config;
track.width = config.width;
track.height = config.height;
track.sps = [currentNal.data];
track.profileIdc = config.profileIdc;
track.levelIdc = config.levelIdc;
track.profileCompatibility = config.profileCompatibility;
h264Frame.endNalUnit();
} else if (currentNal.nalUnitType === 'pic_parameter_set_rbsp') {
track.newMetadata = true;
track.pps = [currentNal.data];
h264Frame.endNalUnit();
} else if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {
if (h264Frame) {
this.finishFrame(tags, h264Frame);
}
h264Frame = new FlvTag(FlvTag.VIDEO_TAG);
h264Frame.pts = currentNal.pts;
h264Frame.dts = currentNal.dts;
} else {
if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {
// the current sample is a key frame
h264Frame.keyFrame = true;
}
h264Frame.endNalUnit();
}
h264Frame.startNalUnit();
h264Frame.writeBytes(currentNal.data);
}
if (h264Frame) {
this.finishFrame(tags, h264Frame);
}
this.trigger('data', {
track: track,
tags: tags.list
}); // Continue with the flush process now
this.trigger('done', 'VideoSegmentStream');
};
};
_VideoSegmentStream.prototype = new Stream();
/**
* An object that incrementally transmuxes MPEG2 Trasport Stream
* chunks into an FLV.
*/
_Transmuxer = function Transmuxer(options) {
var self = this,
packetStream,
parseStream,
elementaryStream,
videoTimestampRolloverStream,
audioTimestampRolloverStream,
timedMetadataTimestampRolloverStream,
adtsStream,
h264Stream,
videoSegmentStream,
audioSegmentStream,
captionStream,
coalesceStream;
_Transmuxer.prototype.init.call(this);
options = options || {}; // expose the metadata stream
this.metadataStream = new m2ts.MetadataStream();
options.metadataStream = this.metadataStream; // set up the parsing pipeline
packetStream = new m2ts.TransportPacketStream();
parseStream = new m2ts.TransportParseStream();
elementaryStream = new m2ts.ElementaryStream();
videoTimestampRolloverStream = new m2ts.TimestampRolloverStream('video');
audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');
timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');
adtsStream = new AdtsStream();
h264Stream = new H264Stream();
coalesceStream = new CoalesceStream(options); // disassemble MPEG2-TS packets into elementary streams
packetStream.pipe(parseStream).pipe(elementaryStream); // !!THIS ORDER IS IMPORTANT!!
// demux the streams
elementaryStream.pipe(videoTimestampRolloverStream).pipe(h264Stream);
elementaryStream.pipe(audioTimestampRolloverStream).pipe(adtsStream);
elementaryStream.pipe(timedMetadataTimestampRolloverStream).pipe(this.metadataStream).pipe(coalesceStream); // if CEA-708 parsing is available, hook up a caption stream
captionStream = new m2ts.CaptionStream(options);
h264Stream.pipe(captionStream).pipe(coalesceStream); // hook up the segment streams once track metadata is delivered
elementaryStream.on('data', function (data) {
var i, videoTrack, audioTrack;
if (data.type === 'metadata') {
i = data.tracks.length; // scan the tracks listed in the metadata
while (i--) {
if (data.tracks[i].type === 'video') {
videoTrack = data.tracks[i];
} else if (data.tracks[i].type === 'audio') {
audioTrack = data.tracks[i];
}
} // hook up the video segment stream to the first track with h264 data
if (videoTrack && !videoSegmentStream) {
coalesceStream.numberOfTracks++;
videoSegmentStream = new _VideoSegmentStream(videoTrack); // Set up the final part of the video pipeline
h264Stream.pipe(videoSegmentStream).pipe(coalesceStream);
}
if (audioTrack && !audioSegmentStream) {
// hook up the audio segment stream to the first track with aac data
coalesceStream.numberOfTracks++;
audioSegmentStream = new _AudioSegmentStream(audioTrack); // Set up the final part of the audio pipeline
adtsStream.pipe(audioSegmentStream).pipe(coalesceStream);
if (videoSegmentStream) {
videoSegmentStream.on('keyframe', audioSegmentStream.onVideoKeyFrame);
}
}
}
}); // feed incoming data to the front of the parsing pipeline
this.push = function (data) {
packetStream.push(data);
}; // flush any buffered data
this.flush = function () {
// Start at the top of the pipeline and flush all pending work
packetStream.flush();
}; // Caption data has to be reset when seeking outside buffered range
this.resetCaptions = function () {
captionStream.reset();
}; // Re-emit any data coming from the coalesce stream to the outside world
coalesceStream.on('data', function (event) {
self.trigger('data', event);
}); // Let the consumer know we have finished flushing the entire pipeline
coalesceStream.on('done', function () {
self.trigger('done');
});
};
_Transmuxer.prototype = new Stream(); // forward compatibility
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var Stream = require('../utils/stream.js');
var FlvTag = require('./flv-tag.js');
var m2ts = require('../m2ts/m2ts.js');
var AdtsStream = require('../codecs/adts.js');
var H264Stream = require('../codecs/h264').H264Stream;
var CoalesceStream = require('./coalesce-stream.js');
var TagList = require('./tag-list.js');
var _Transmuxer, _VideoSegmentStream, _AudioSegmentStream, collectTimelineInfo, metaDataTag, extraDataTag;
/**
* Store information about the start and end of the tracka and the
* duration for each frame/sample we process in order to calculate
* the baseMediaDecodeTime
*/
collectTimelineInfo = function collectTimelineInfo(track, data) {
if (typeof data.pts === 'number') {
if (track.timelineStartInfo.pts === undefined) {
track.timelineStartInfo.pts = data.pts;
} else {
track.timelineStartInfo.pts = Math.min(track.timelineStartInfo.pts, data.pts);
}
}
if (typeof data.dts === 'number') {
if (track.timelineStartInfo.dts === undefined) {
track.timelineStartInfo.dts = data.dts;
} else {
track.timelineStartInfo.dts = Math.min(track.timelineStartInfo.dts, data.dts);
}
}
};
metaDataTag = function metaDataTag(track, pts) {
var tag = new FlvTag(FlvTag.METADATA_TAG); // :FlvTag
tag.dts = pts;
tag.pts = pts;
tag.writeMetaDataDouble('videocodecid', 7);
tag.writeMetaDataDouble('width', track.width);
tag.writeMetaDataDouble('height', track.height);
return tag;
};
extraDataTag = function extraDataTag(track, pts) {
var i,
tag = new FlvTag(FlvTag.VIDEO_TAG, true);
tag.dts = pts;
tag.pts = pts;
tag.writeByte(0x01); // version
tag.writeByte(track.profileIdc); // profile
tag.writeByte(track.profileCompatibility); // compatibility
tag.writeByte(track.levelIdc); // level
tag.writeByte(0xFC | 0x03); // reserved (6 bits), NULA length size - 1 (2 bits)
tag.writeByte(0xE0 | 0x01); // reserved (3 bits), num of SPS (5 bits)
tag.writeShort(track.sps[0].length); // data of SPS
tag.writeBytes(track.sps[0]); // SPS
tag.writeByte(track.pps.length); // num of PPS (will there ever be more that 1 PPS?)
for (i = 0; i < track.pps.length; ++i) {
tag.writeShort(track.pps[i].length); // 2 bytes for length of PPS
tag.writeBytes(track.pps[i]); // data of PPS
}
return tag;
};
/**
* Constructs a single-track, media segment from AAC data
* events. The output of this stream can be fed to flash.
*/
_AudioSegmentStream = function AudioSegmentStream(track) {
var adtsFrames = [],
videoKeyFrames = [],
oldExtraData;
_AudioSegmentStream.prototype.init.call(this);
this.push = function (data) {
collectTimelineInfo(track, data);
if (track) {
track.audioobjecttype = data.audioobjecttype;
track.channelcount = data.channelcount;
track.samplerate = data.samplerate;
track.samplingfrequencyindex = data.samplingfrequencyindex;
track.samplesize = data.samplesize;
track.extraData = track.audioobjecttype << 11 | track.samplingfrequencyindex << 7 | track.channelcount << 3;
}
data.pts = Math.round(data.pts / 90);
data.dts = Math.round(data.dts / 90); // buffer audio data until end() is called
adtsFrames.push(data);
};
this.flush = function () {
var currentFrame,
adtsFrame,
lastMetaPts,
tags = new TagList(); // return early if no audio data has been observed
if (adtsFrames.length === 0) {
this.trigger('done', 'AudioSegmentStream');
return;
}
lastMetaPts = -Infinity;
while (adtsFrames.length) {
currentFrame = adtsFrames.shift(); // write out a metadata frame at every video key frame
if (videoKeyFrames.length && currentFrame.pts >= videoKeyFrames[0]) {
lastMetaPts = videoKeyFrames.shift();
this.writeMetaDataTags(tags, lastMetaPts);
} // also write out metadata tags every 1 second so that the decoder
// is re-initialized quickly after seeking into a different
// audio configuration.
if (track.extraData !== oldExtraData || currentFrame.pts - lastMetaPts >= 1000) {
this.writeMetaDataTags(tags, currentFrame.pts);
oldExtraData = track.extraData;
lastMetaPts = currentFrame.pts;
}
adtsFrame = new FlvTag(FlvTag.AUDIO_TAG);
adtsFrame.pts = currentFrame.pts;
adtsFrame.dts = currentFrame.dts;
adtsFrame.writeBytes(currentFrame.data);
tags.push(adtsFrame.finalize());
}
videoKeyFrames.length = 0;
oldExtraData = null;
this.trigger('data', {
track: track,
tags: tags.list
});
this.trigger('done', 'AudioSegmentStream');
};
this.writeMetaDataTags = function (tags, pts) {
var adtsFrame;
adtsFrame = new FlvTag(FlvTag.METADATA_TAG); // For audio, DTS is always the same as PTS. We want to set the DTS
// however so we can compare with video DTS to determine approximate
// packet order
adtsFrame.pts = pts;
adtsFrame.dts = pts; // AAC is always 10
adtsFrame.writeMetaDataDouble('audiocodecid', 10);
adtsFrame.writeMetaDataBoolean('stereo', track.channelcount === 2);
adtsFrame.writeMetaDataDouble('audiosamplerate', track.samplerate); // Is AAC always 16 bit?
adtsFrame.writeMetaDataDouble('audiosamplesize', 16);
tags.push(adtsFrame.finalize());
adtsFrame = new FlvTag(FlvTag.AUDIO_TAG, true); // For audio, DTS is always the same as PTS. We want to set the DTS
// however so we can compare with video DTS to determine approximate
// packet order
adtsFrame.pts = pts;
adtsFrame.dts = pts;
adtsFrame.view.setUint16(adtsFrame.position, track.extraData);
adtsFrame.position += 2;
adtsFrame.length = Math.max(adtsFrame.length, adtsFrame.position);
tags.push(adtsFrame.finalize());
};
this.onVideoKeyFrame = function (pts) {
videoKeyFrames.push(pts);
};
};
_AudioSegmentStream.prototype = new Stream();
/**
* Store FlvTags for the h264 stream
* @param track {object} track metadata configuration
*/
_VideoSegmentStream = function VideoSegmentStream(track) {
var nalUnits = [],
config,
h264Frame;
_VideoSegmentStream.prototype.init.call(this);
this.finishFrame = function (tags, frame) {
if (!frame) {
return;
} // Check if keyframe and the length of tags.
// This makes sure we write metadata on the first frame of a segment.
if (config && track && track.newMetadata && (frame.keyFrame || tags.length === 0)) {
// Push extra data on every IDR frame in case we did a stream change + seek
var metaTag = metaDataTag(config, frame.dts).finalize();
var extraTag = extraDataTag(track, frame.dts).finalize();
metaTag.metaDataTag = extraTag.metaDataTag = true;
tags.push(metaTag);
tags.push(extraTag);
track.newMetadata = false;
this.trigger('keyframe', frame.dts);
}
frame.endNalUnit();
tags.push(frame.finalize());
h264Frame = null;
};
this.push = function (data) {
collectTimelineInfo(track, data);
data.pts = Math.round(data.pts / 90);
data.dts = Math.round(data.dts / 90); // buffer video until flush() is called
nalUnits.push(data);
};
this.flush = function () {
var currentNal,
tags = new TagList(); // Throw away nalUnits at the start of the byte stream until we find
// the first AUD
while (nalUnits.length) {
if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {
break;
}
nalUnits.shift();
} // return early if no video data has been observed
if (nalUnits.length === 0) {
this.trigger('done', 'VideoSegmentStream');
return;
}
while (nalUnits.length) {
currentNal = nalUnits.shift(); // record the track config
if (currentNal.nalUnitType === 'seq_parameter_set_rbsp') {
track.newMetadata = true;
config = currentNal.config;
track.width = config.width;
track.height = config.height;
track.sps = [currentNal.data];
track.profileIdc = config.profileIdc;
track.levelIdc = config.levelIdc;
track.profileCompatibility = config.profileCompatibility;
h264Frame.endNalUnit();
} else if (currentNal.nalUnitType === 'pic_parameter_set_rbsp') {
track.newMetadata = true;
track.pps = [currentNal.data];
h264Frame.endNalUnit();
} else if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {
if (h264Frame) {
this.finishFrame(tags, h264Frame);
}
h264Frame = new FlvTag(FlvTag.VIDEO_TAG);
h264Frame.pts = currentNal.pts;
h264Frame.dts = currentNal.dts;
} else {
if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {
// the current sample is a key frame
h264Frame.keyFrame = true;
}
h264Frame.endNalUnit();
}
h264Frame.startNalUnit();
h264Frame.writeBytes(currentNal.data);
}
if (h264Frame) {
this.finishFrame(tags, h264Frame);
}
this.trigger('data', {
track: track,
tags: tags.list
}); // Continue with the flush process now
this.trigger('done', 'VideoSegmentStream');
};
};
_VideoSegmentStream.prototype = new Stream();
/**
* An object that incrementally transmuxes MPEG2 Trasport Stream
* chunks into an FLV.
*/
_Transmuxer = function Transmuxer(options) {
var self = this,
packetStream,
parseStream,
elementaryStream,
videoTimestampRolloverStream,
audioTimestampRolloverStream,
timedMetadataTimestampRolloverStream,
adtsStream,
h264Stream,
videoSegmentStream,
audioSegmentStream,
captionStream,
coalesceStream;
_Transmuxer.prototype.init.call(this);
options = options || {}; // expose the metadata stream
this.metadataStream = new m2ts.MetadataStream();
options.metadataStream = this.metadataStream; // set up the parsing pipeline
packetStream = new m2ts.TransportPacketStream();
parseStream = new m2ts.TransportParseStream();
elementaryStream = new m2ts.ElementaryStream();
videoTimestampRolloverStream = new m2ts.TimestampRolloverStream('video');
audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');
timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');
adtsStream = new AdtsStream();
h264Stream = new H264Stream();
coalesceStream = new CoalesceStream(options); // disassemble MPEG2-TS packets into elementary streams
packetStream.pipe(parseStream).pipe(elementaryStream); // !!THIS ORDER IS IMPORTANT!!
// demux the streams
elementaryStream.pipe(videoTimestampRolloverStream).pipe(h264Stream);
elementaryStream.pipe(audioTimestampRolloverStream).pipe(adtsStream);
elementaryStream.pipe(timedMetadataTimestampRolloverStream).pipe(this.metadataStream).pipe(coalesceStream); // if CEA-708 parsing is available, hook up a caption stream
captionStream = new m2ts.CaptionStream(options);
h264Stream.pipe(captionStream).pipe(coalesceStream); // hook up the segment streams once track metadata is delivered
elementaryStream.on('data', function (data) {
var i, videoTrack, audioTrack;
if (data.type === 'metadata') {
i = data.tracks.length; // scan the tracks listed in the metadata
while (i--) {
if (data.tracks[i].type === 'video') {
videoTrack = data.tracks[i];
} else if (data.tracks[i].type === 'audio') {
audioTrack = data.tracks[i];
}
} // hook up the video segment stream to the first track with h264 data
if (videoTrack && !videoSegmentStream) {
coalesceStream.numberOfTracks++;
videoSegmentStream = new _VideoSegmentStream(videoTrack); // Set up the final part of the video pipeline
h264Stream.pipe(videoSegmentStream).pipe(coalesceStream);
}
if (audioTrack && !audioSegmentStream) {
// hook up the audio segment stream to the first track with aac data
coalesceStream.numberOfTracks++;
audioSegmentStream = new _AudioSegmentStream(audioTrack); // Set up the final part of the audio pipeline
adtsStream.pipe(audioSegmentStream).pipe(coalesceStream);
if (videoSegmentStream) {
videoSegmentStream.on('keyframe', audioSegmentStream.onVideoKeyFrame);
}
}
}
}); // feed incoming data to the front of the parsing pipeline
this.push = function (data) {
packetStream.push(data);
}; // flush any buffered data
this.flush = function () {
// Start at the top of the pipeline and flush all pending work
packetStream.flush();
}; // Caption data has to be reset when seeking outside buffered range
this.resetCaptions = function () {
captionStream.reset();
}; // Re-emit any data coming from the coalesce stream to the outside world
coalesceStream.on('data', function (event) {
self.trigger('data', event);
}); // Let the consumer know we have finished flushing the entire pipeline
coalesceStream.on('done', function () {
self.trigger('done');
});
};
_Transmuxer.prototype = new Stream(); // forward compatibility
module.exports = _Transmuxer;

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@ -1,20 +1,20 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var muxjs = {
codecs: require('./codecs'),
mp4: require('./mp4'),
flv: require('./flv'),
mp2t: require('./m2ts'),
partial: require('./partial')
}; // include all the tools when the full library is required
muxjs.mp4.tools = require('./tools/mp4-inspector');
muxjs.flv.tools = require('./tools/flv-inspector');
muxjs.mp2t.tools = require('./tools/ts-inspector');
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var muxjs = {
codecs: require('./codecs'),
mp4: require('./mp4'),
flv: require('./flv'),
mp2t: require('./m2ts'),
partial: require('./partial')
}; // include all the tools when the full library is required
muxjs.mp4.tools = require('./tools/mp4-inspector');
muxjs.flv.tools = require('./tools/flv-inspector');
muxjs.mp2t.tools = require('./tools/ts-inspector');
module.exports = muxjs;

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node_modules/mux.js/cjs/m2ts/index.js generated vendored
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@ -1,9 +1,9 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = require('./m2ts');

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@ -1,248 +1,248 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Accepts program elementary stream (PES) data events and parses out
* ID3 metadata from them, if present.
* @see http://id3.org/id3v2.3.0
*/
'use strict';
var Stream = require('../utils/stream'),
StreamTypes = require('./stream-types'),
// return a percent-encoded representation of the specified byte range
// @see http://en.wikipedia.org/wiki/Percent-encoding
percentEncode = function percentEncode(bytes, start, end) {
var i,
result = '';
for (i = start; i < end; i++) {
result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
}
return result;
},
// return the string representation of the specified byte range,
// interpreted as UTf-8.
parseUtf8 = function parseUtf8(bytes, start, end) {
return decodeURIComponent(percentEncode(bytes, start, end));
},
// return the string representation of the specified byte range,
// interpreted as ISO-8859-1.
parseIso88591 = function parseIso88591(bytes, start, end) {
return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
},
parseSyncSafeInteger = function parseSyncSafeInteger(data) {
return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
},
tagParsers = {
TXXX: function TXXX(tag) {
var i;
if (tag.data[0] !== 3) {
// ignore frames with unrecognized character encodings
return;
}
for (i = 1; i < tag.data.length; i++) {
if (tag.data[i] === 0) {
// parse the text fields
tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value
tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\0*$/, '');
break;
}
}
tag.data = tag.value;
},
WXXX: function WXXX(tag) {
var i;
if (tag.data[0] !== 3) {
// ignore frames with unrecognized character encodings
return;
}
for (i = 1; i < tag.data.length; i++) {
if (tag.data[i] === 0) {
// parse the description and URL fields
tag.description = parseUtf8(tag.data, 1, i);
tag.url = parseUtf8(tag.data, i + 1, tag.data.length);
break;
}
}
},
PRIV: function PRIV(tag) {
var i;
for (i = 0; i < tag.data.length; i++) {
if (tag.data[i] === 0) {
// parse the description and URL fields
tag.owner = parseIso88591(tag.data, 0, i);
break;
}
}
tag.privateData = tag.data.subarray(i + 1);
tag.data = tag.privateData;
}
},
_MetadataStream;
_MetadataStream = function MetadataStream(options) {
var settings = {
// the bytes of the program-level descriptor field in MP2T
// see ISO/IEC 13818-1:2013 (E), section 2.6 "Program and
// program element descriptors"
descriptor: options && options.descriptor
},
// the total size in bytes of the ID3 tag being parsed
tagSize = 0,
// tag data that is not complete enough to be parsed
buffer = [],
// the total number of bytes currently in the buffer
bufferSize = 0,
i;
_MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type
// https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track
this.dispatchType = StreamTypes.METADATA_STREAM_TYPE.toString(16);
if (settings.descriptor) {
for (i = 0; i < settings.descriptor.length; i++) {
this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);
}
}
this.push = function (chunk) {
var tag, frameStart, frameSize, frame, i, frameHeader;
if (chunk.type !== 'timed-metadata') {
return;
} // if data_alignment_indicator is set in the PES header,
// we must have the start of a new ID3 tag. Assume anything
// remaining in the buffer was malformed and throw it out
if (chunk.dataAlignmentIndicator) {
bufferSize = 0;
buffer.length = 0;
} // ignore events that don't look like ID3 data
if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {
this.trigger('log', {
level: 'warn',
message: 'Skipping unrecognized metadata packet'
});
return;
} // add this chunk to the data we've collected so far
buffer.push(chunk);
bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header
if (buffer.length === 1) {
// the frame size is transmitted as a 28-bit integer in the
// last four bytes of the ID3 header.
// The most significant bit of each byte is dropped and the
// results concatenated to recover the actual value.
tagSize = parseSyncSafeInteger(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more
// convenient for our comparisons to include it
tagSize += 10;
} // if the entire frame has not arrived, wait for more data
if (bufferSize < tagSize) {
return;
} // collect the entire frame so it can be parsed
tag = {
data: new Uint8Array(tagSize),
frames: [],
pts: buffer[0].pts,
dts: buffer[0].dts
};
for (i = 0; i < tagSize;) {
tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);
i += buffer[0].data.byteLength;
bufferSize -= buffer[0].data.byteLength;
buffer.shift();
} // find the start of the first frame and the end of the tag
frameStart = 10;
if (tag.data[5] & 0x40) {
// advance the frame start past the extended header
frameStart += 4; // header size field
frameStart += parseSyncSafeInteger(tag.data.subarray(10, 14)); // clip any padding off the end
tagSize -= parseSyncSafeInteger(tag.data.subarray(16, 20));
} // parse one or more ID3 frames
// http://id3.org/id3v2.3.0#ID3v2_frame_overview
do {
// determine the number of bytes in this frame
frameSize = parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));
if (frameSize < 1) {
this.trigger('log', {
level: 'warn',
message: 'Malformed ID3 frame encountered. Skipping metadata parsing.'
});
return;
}
frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);
frame = {
id: frameHeader,
data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)
};
frame.key = frame.id;
if (tagParsers[frame.id]) {
tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start
// time for raw AAC data
if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {
var d = frame.data,
size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
size *= 4;
size += d[7] & 0x03;
frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based
// on the value of this frame
// we couldn't have known the appropriate pts and dts before
// parsing this ID3 tag so set those values now
if (tag.pts === undefined && tag.dts === undefined) {
tag.pts = frame.timeStamp;
tag.dts = frame.timeStamp;
}
this.trigger('timestamp', frame);
}
}
tag.frames.push(frame);
frameStart += 10; // advance past the frame header
frameStart += frameSize; // advance past the frame body
} while (frameStart < tagSize);
this.trigger('data', tag);
};
};
_MetadataStream.prototype = new Stream();
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Accepts program elementary stream (PES) data events and parses out
* ID3 metadata from them, if present.
* @see http://id3.org/id3v2.3.0
*/
'use strict';
var Stream = require('../utils/stream'),
StreamTypes = require('./stream-types'),
// return a percent-encoded representation of the specified byte range
// @see http://en.wikipedia.org/wiki/Percent-encoding
percentEncode = function percentEncode(bytes, start, end) {
var i,
result = '';
for (i = start; i < end; i++) {
result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
}
return result;
},
// return the string representation of the specified byte range,
// interpreted as UTf-8.
parseUtf8 = function parseUtf8(bytes, start, end) {
return decodeURIComponent(percentEncode(bytes, start, end));
},
// return the string representation of the specified byte range,
// interpreted as ISO-8859-1.
parseIso88591 = function parseIso88591(bytes, start, end) {
return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
},
parseSyncSafeInteger = function parseSyncSafeInteger(data) {
return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
},
tagParsers = {
TXXX: function TXXX(tag) {
var i;
if (tag.data[0] !== 3) {
// ignore frames with unrecognized character encodings
return;
}
for (i = 1; i < tag.data.length; i++) {
if (tag.data[i] === 0) {
// parse the text fields
tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value
tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\0*$/, '');
break;
}
}
tag.data = tag.value;
},
WXXX: function WXXX(tag) {
var i;
if (tag.data[0] !== 3) {
// ignore frames with unrecognized character encodings
return;
}
for (i = 1; i < tag.data.length; i++) {
if (tag.data[i] === 0) {
// parse the description and URL fields
tag.description = parseUtf8(tag.data, 1, i);
tag.url = parseUtf8(tag.data, i + 1, tag.data.length);
break;
}
}
},
PRIV: function PRIV(tag) {
var i;
for (i = 0; i < tag.data.length; i++) {
if (tag.data[i] === 0) {
// parse the description and URL fields
tag.owner = parseIso88591(tag.data, 0, i);
break;
}
}
tag.privateData = tag.data.subarray(i + 1);
tag.data = tag.privateData;
}
},
_MetadataStream;
_MetadataStream = function MetadataStream(options) {
var settings = {
// the bytes of the program-level descriptor field in MP2T
// see ISO/IEC 13818-1:2013 (E), section 2.6 "Program and
// program element descriptors"
descriptor: options && options.descriptor
},
// the total size in bytes of the ID3 tag being parsed
tagSize = 0,
// tag data that is not complete enough to be parsed
buffer = [],
// the total number of bytes currently in the buffer
bufferSize = 0,
i;
_MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type
// https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track
this.dispatchType = StreamTypes.METADATA_STREAM_TYPE.toString(16);
if (settings.descriptor) {
for (i = 0; i < settings.descriptor.length; i++) {
this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);
}
}
this.push = function (chunk) {
var tag, frameStart, frameSize, frame, i, frameHeader;
if (chunk.type !== 'timed-metadata') {
return;
} // if data_alignment_indicator is set in the PES header,
// we must have the start of a new ID3 tag. Assume anything
// remaining in the buffer was malformed and throw it out
if (chunk.dataAlignmentIndicator) {
bufferSize = 0;
buffer.length = 0;
} // ignore events that don't look like ID3 data
if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {
this.trigger('log', {
level: 'warn',
message: 'Skipping unrecognized metadata packet'
});
return;
} // add this chunk to the data we've collected so far
buffer.push(chunk);
bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header
if (buffer.length === 1) {
// the frame size is transmitted as a 28-bit integer in the
// last four bytes of the ID3 header.
// The most significant bit of each byte is dropped and the
// results concatenated to recover the actual value.
tagSize = parseSyncSafeInteger(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more
// convenient for our comparisons to include it
tagSize += 10;
} // if the entire frame has not arrived, wait for more data
if (bufferSize < tagSize) {
return;
} // collect the entire frame so it can be parsed
tag = {
data: new Uint8Array(tagSize),
frames: [],
pts: buffer[0].pts,
dts: buffer[0].dts
};
for (i = 0; i < tagSize;) {
tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);
i += buffer[0].data.byteLength;
bufferSize -= buffer[0].data.byteLength;
buffer.shift();
} // find the start of the first frame and the end of the tag
frameStart = 10;
if (tag.data[5] & 0x40) {
// advance the frame start past the extended header
frameStart += 4; // header size field
frameStart += parseSyncSafeInteger(tag.data.subarray(10, 14)); // clip any padding off the end
tagSize -= parseSyncSafeInteger(tag.data.subarray(16, 20));
} // parse one or more ID3 frames
// http://id3.org/id3v2.3.0#ID3v2_frame_overview
do {
// determine the number of bytes in this frame
frameSize = parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));
if (frameSize < 1) {
this.trigger('log', {
level: 'warn',
message: 'Malformed ID3 frame encountered. Skipping metadata parsing.'
});
return;
}
frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);
frame = {
id: frameHeader,
data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)
};
frame.key = frame.id;
if (tagParsers[frame.id]) {
tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start
// time for raw AAC data
if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {
var d = frame.data,
size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
size *= 4;
size += d[7] & 0x03;
frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based
// on the value of this frame
// we couldn't have known the appropriate pts and dts before
// parsing this ID3 tag so set those values now
if (tag.pts === undefined && tag.dts === undefined) {
tag.pts = frame.timeStamp;
tag.dts = frame.timeStamp;
}
this.trigger('timestamp', frame);
}
}
tag.frames.push(frame);
frameStart += 10; // advance past the frame header
frameStart += frameSize; // advance past the frame body
} while (frameStart < tagSize);
this.trigger('data', tag);
};
};
_MetadataStream.prototype = new Stream();
module.exports = _MetadataStream;

596
node_modules/mux.js/cjs/m2ts/probe.js generated vendored
View file

@ -1,299 +1,299 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Utilities to detect basic properties and metadata about TS Segments.
*/
'use strict';
var StreamTypes = require('./stream-types.js');
var parsePid = function parsePid(packet) {
var pid = packet[1] & 0x1f;
pid <<= 8;
pid |= packet[2];
return pid;
};
var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {
return !!(packet[1] & 0x40);
};
var parseAdaptionField = function parseAdaptionField(packet) {
var offset = 0; // if an adaption field is present, its length is specified by the
// fifth byte of the TS packet header. The adaptation field is
// used to add stuffing to PES packets that don't fill a complete
// TS packet, and to specify some forms of timing and control data
// that we do not currently use.
if ((packet[3] & 0x30) >>> 4 > 0x01) {
offset += packet[4] + 1;
}
return offset;
};
var parseType = function parseType(packet, pmtPid) {
var pid = parsePid(packet);
if (pid === 0) {
return 'pat';
} else if (pid === pmtPid) {
return 'pmt';
} else if (pmtPid) {
return 'pes';
}
return null;
};
var parsePat = function parsePat(packet) {
var pusi = parsePayloadUnitStartIndicator(packet);
var offset = 4 + parseAdaptionField(packet);
if (pusi) {
offset += packet[offset] + 1;
}
return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];
};
var parsePmt = function parsePmt(packet) {
var programMapTable = {};
var pusi = parsePayloadUnitStartIndicator(packet);
var payloadOffset = 4 + parseAdaptionField(packet);
if (pusi) {
payloadOffset += packet[payloadOffset] + 1;
} // PMTs can be sent ahead of the time when they should actually
// take effect. We don't believe this should ever be the case
// for HLS but we'll ignore "forward" PMT declarations if we see
// them. Future PMT declarations have the current_next_indicator
// set to zero.
if (!(packet[payloadOffset + 5] & 0x01)) {
return;
}
var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section
sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];
tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how
// long the program info descriptors are
programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table
var offset = 12 + programInfoLength;
while (offset < tableEnd) {
var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type
programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry
// skip past the elementary stream descriptors, if present
offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;
}
return programMapTable;
};
var parsePesType = function parsePesType(packet, programMapTable) {
var pid = parsePid(packet);
var type = programMapTable[pid];
switch (type) {
case StreamTypes.H264_STREAM_TYPE:
return 'video';
case StreamTypes.ADTS_STREAM_TYPE:
return 'audio';
case StreamTypes.METADATA_STREAM_TYPE:
return 'timed-metadata';
default:
return null;
}
};
var parsePesTime = function parsePesTime(packet) {
var pusi = parsePayloadUnitStartIndicator(packet);
if (!pusi) {
return null;
}
var offset = 4 + parseAdaptionField(packet);
if (offset >= packet.byteLength) {
// From the H 222.0 MPEG-TS spec
// "For transport stream packets carrying PES packets, stuffing is needed when there
// is insufficient PES packet data to completely fill the transport stream packet
// payload bytes. Stuffing is accomplished by defining an adaptation field longer than
// the sum of the lengths of the data elements in it, so that the payload bytes
// remaining after the adaptation field exactly accommodates the available PES packet
// data."
//
// If the offset is >= the length of the packet, then the packet contains no data
// and instead is just adaption field stuffing bytes
return null;
}
var pes = null;
var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value
// and a DTS value. Determine what combination of values is
// available to work with.
ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number. Javascript
// performs all bitwise operations on 32-bit integers but javascript
// supports a much greater range (52-bits) of integer using standard
// mathematical operations.
// We construct a 31-bit value using bitwise operators over the 31
// most significant bits and then multiply by 4 (equal to a left-shift
// of 2) before we add the final 2 least significant bits of the
// timestamp (equal to an OR.)
if (ptsDtsFlags & 0xC0) {
pes = {}; // the PTS and DTS are not written out directly. For information
// on how they are encoded, see
// http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;
pes.pts *= 4; // Left shift by 2
pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs
pes.dts = pes.pts;
if (ptsDtsFlags & 0x40) {
pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;
pes.dts *= 4; // Left shift by 2
pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs
}
}
return pes;
};
var parseNalUnitType = function parseNalUnitType(type) {
switch (type) {
case 0x05:
return 'slice_layer_without_partitioning_rbsp_idr';
case 0x06:
return 'sei_rbsp';
case 0x07:
return 'seq_parameter_set_rbsp';
case 0x08:
return 'pic_parameter_set_rbsp';
case 0x09:
return 'access_unit_delimiter_rbsp';
default:
return null;
}
};
var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {
var offset = 4 + parseAdaptionField(packet);
var frameBuffer = packet.subarray(offset);
var frameI = 0;
var frameSyncPoint = 0;
var foundKeyFrame = false;
var nalType; // advance the sync point to a NAL start, if necessary
for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {
if (frameBuffer[frameSyncPoint + 2] === 1) {
// the sync point is properly aligned
frameI = frameSyncPoint + 5;
break;
}
}
while (frameI < frameBuffer.byteLength) {
// look at the current byte to determine if we've hit the end of
// a NAL unit boundary
switch (frameBuffer[frameI]) {
case 0:
// skip past non-sync sequences
if (frameBuffer[frameI - 1] !== 0) {
frameI += 2;
break;
} else if (frameBuffer[frameI - 2] !== 0) {
frameI++;
break;
}
if (frameSyncPoint + 3 !== frameI - 2) {
nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
foundKeyFrame = true;
}
} // drop trailing zeroes
do {
frameI++;
} while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);
frameSyncPoint = frameI - 2;
frameI += 3;
break;
case 1:
// skip past non-sync sequences
if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {
frameI += 3;
break;
}
nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
foundKeyFrame = true;
}
frameSyncPoint = frameI - 2;
frameI += 3;
break;
default:
// the current byte isn't a one or zero, so it cannot be part
// of a sync sequence
frameI += 3;
break;
}
}
frameBuffer = frameBuffer.subarray(frameSyncPoint);
frameI -= frameSyncPoint;
frameSyncPoint = 0; // parse the final nal
if (frameBuffer && frameBuffer.byteLength > 3) {
nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
foundKeyFrame = true;
}
}
return foundKeyFrame;
};
module.exports = {
parseType: parseType,
parsePat: parsePat,
parsePmt: parsePmt,
parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,
parsePesType: parsePesType,
parsePesTime: parsePesTime,
videoPacketContainsKeyFrame: videoPacketContainsKeyFrame
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Utilities to detect basic properties and metadata about TS Segments.
*/
'use strict';
var StreamTypes = require('./stream-types.js');
var parsePid = function parsePid(packet) {
var pid = packet[1] & 0x1f;
pid <<= 8;
pid |= packet[2];
return pid;
};
var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {
return !!(packet[1] & 0x40);
};
var parseAdaptionField = function parseAdaptionField(packet) {
var offset = 0; // if an adaption field is present, its length is specified by the
// fifth byte of the TS packet header. The adaptation field is
// used to add stuffing to PES packets that don't fill a complete
// TS packet, and to specify some forms of timing and control data
// that we do not currently use.
if ((packet[3] & 0x30) >>> 4 > 0x01) {
offset += packet[4] + 1;
}
return offset;
};
var parseType = function parseType(packet, pmtPid) {
var pid = parsePid(packet);
if (pid === 0) {
return 'pat';
} else if (pid === pmtPid) {
return 'pmt';
} else if (pmtPid) {
return 'pes';
}
return null;
};
var parsePat = function parsePat(packet) {
var pusi = parsePayloadUnitStartIndicator(packet);
var offset = 4 + parseAdaptionField(packet);
if (pusi) {
offset += packet[offset] + 1;
}
return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];
};
var parsePmt = function parsePmt(packet) {
var programMapTable = {};
var pusi = parsePayloadUnitStartIndicator(packet);
var payloadOffset = 4 + parseAdaptionField(packet);
if (pusi) {
payloadOffset += packet[payloadOffset] + 1;
} // PMTs can be sent ahead of the time when they should actually
// take effect. We don't believe this should ever be the case
// for HLS but we'll ignore "forward" PMT declarations if we see
// them. Future PMT declarations have the current_next_indicator
// set to zero.
if (!(packet[payloadOffset + 5] & 0x01)) {
return;
}
var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section
sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];
tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how
// long the program info descriptors are
programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table
var offset = 12 + programInfoLength;
while (offset < tableEnd) {
var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type
programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry
// skip past the elementary stream descriptors, if present
offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;
}
return programMapTable;
};
var parsePesType = function parsePesType(packet, programMapTable) {
var pid = parsePid(packet);
var type = programMapTable[pid];
switch (type) {
case StreamTypes.H264_STREAM_TYPE:
return 'video';
case StreamTypes.ADTS_STREAM_TYPE:
return 'audio';
case StreamTypes.METADATA_STREAM_TYPE:
return 'timed-metadata';
default:
return null;
}
};
var parsePesTime = function parsePesTime(packet) {
var pusi = parsePayloadUnitStartIndicator(packet);
if (!pusi) {
return null;
}
var offset = 4 + parseAdaptionField(packet);
if (offset >= packet.byteLength) {
// From the H 222.0 MPEG-TS spec
// "For transport stream packets carrying PES packets, stuffing is needed when there
// is insufficient PES packet data to completely fill the transport stream packet
// payload bytes. Stuffing is accomplished by defining an adaptation field longer than
// the sum of the lengths of the data elements in it, so that the payload bytes
// remaining after the adaptation field exactly accommodates the available PES packet
// data."
//
// If the offset is >= the length of the packet, then the packet contains no data
// and instead is just adaption field stuffing bytes
return null;
}
var pes = null;
var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value
// and a DTS value. Determine what combination of values is
// available to work with.
ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number. Javascript
// performs all bitwise operations on 32-bit integers but javascript
// supports a much greater range (52-bits) of integer using standard
// mathematical operations.
// We construct a 31-bit value using bitwise operators over the 31
// most significant bits and then multiply by 4 (equal to a left-shift
// of 2) before we add the final 2 least significant bits of the
// timestamp (equal to an OR.)
if (ptsDtsFlags & 0xC0) {
pes = {}; // the PTS and DTS are not written out directly. For information
// on how they are encoded, see
// http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;
pes.pts *= 4; // Left shift by 2
pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs
pes.dts = pes.pts;
if (ptsDtsFlags & 0x40) {
pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;
pes.dts *= 4; // Left shift by 2
pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs
}
}
return pes;
};
var parseNalUnitType = function parseNalUnitType(type) {
switch (type) {
case 0x05:
return 'slice_layer_without_partitioning_rbsp_idr';
case 0x06:
return 'sei_rbsp';
case 0x07:
return 'seq_parameter_set_rbsp';
case 0x08:
return 'pic_parameter_set_rbsp';
case 0x09:
return 'access_unit_delimiter_rbsp';
default:
return null;
}
};
var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {
var offset = 4 + parseAdaptionField(packet);
var frameBuffer = packet.subarray(offset);
var frameI = 0;
var frameSyncPoint = 0;
var foundKeyFrame = false;
var nalType; // advance the sync point to a NAL start, if necessary
for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {
if (frameBuffer[frameSyncPoint + 2] === 1) {
// the sync point is properly aligned
frameI = frameSyncPoint + 5;
break;
}
}
while (frameI < frameBuffer.byteLength) {
// look at the current byte to determine if we've hit the end of
// a NAL unit boundary
switch (frameBuffer[frameI]) {
case 0:
// skip past non-sync sequences
if (frameBuffer[frameI - 1] !== 0) {
frameI += 2;
break;
} else if (frameBuffer[frameI - 2] !== 0) {
frameI++;
break;
}
if (frameSyncPoint + 3 !== frameI - 2) {
nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
foundKeyFrame = true;
}
} // drop trailing zeroes
do {
frameI++;
} while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);
frameSyncPoint = frameI - 2;
frameI += 3;
break;
case 1:
// skip past non-sync sequences
if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {
frameI += 3;
break;
}
nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
foundKeyFrame = true;
}
frameSyncPoint = frameI - 2;
frameI += 3;
break;
default:
// the current byte isn't a one or zero, so it cannot be part
// of a sync sequence
frameI += 3;
break;
}
}
frameBuffer = frameBuffer.subarray(frameSyncPoint);
frameI -= frameSyncPoint;
frameSyncPoint = 0; // parse the final nal
if (frameBuffer && frameBuffer.byteLength > 3) {
nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
foundKeyFrame = true;
}
}
return foundKeyFrame;
};
module.exports = {
parseType: parseType,
parsePat: parsePat,
parsePmt: parsePmt,
parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,
parsePesType: parsePesType,
parsePesTime: parsePesTime,
videoPacketContainsKeyFrame: videoPacketContainsKeyFrame
};

24
node_modules/mux.js/cjs/m2ts/stream-types.js generated vendored
View file

@ -1,13 +1,13 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
module.exports = {
H264_STREAM_TYPE: 0x1B,
ADTS_STREAM_TYPE: 0x0F,
METADATA_STREAM_TYPE: 0x15
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
module.exports = {
H264_STREAM_TYPE: 0x1B,
ADTS_STREAM_TYPE: 0x0F,
METADATA_STREAM_TYPE: 0x15
};

182
node_modules/mux.js/cjs/m2ts/timestamp-rollover-stream.js generated vendored
View file

@ -1,92 +1,92 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Accepts program elementary stream (PES) data events and corrects
* decode and presentation time stamps to account for a rollover
* of the 33 bit value.
*/
'use strict';
var Stream = require('../utils/stream');
var MAX_TS = 8589934592;
var RO_THRESH = 4294967296;
var TYPE_SHARED = 'shared';
var handleRollover = function handleRollover(value, reference) {
var direction = 1;
if (value > reference) {
// If the current timestamp value is greater than our reference timestamp and we detect a
// timestamp rollover, this means the roll over is happening in the opposite direction.
// Example scenario: Enter a long stream/video just after a rollover occurred. The reference
// point will be set to a small number, e.g. 1. The user then seeks backwards over the
// rollover point. In loading this segment, the timestamp values will be very large,
// e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust
// the time stamp to be `value - 2^33`.
direction = -1;
} // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will
// cause an incorrect adjustment.
while (Math.abs(reference - value) > RO_THRESH) {
value += direction * MAX_TS;
}
return value;
};
var TimestampRolloverStream = function TimestampRolloverStream(type) {
var lastDTS, referenceDTS;
TimestampRolloverStream.prototype.init.call(this); // The "shared" type is used in cases where a stream will contain muxed
// video and audio. We could use `undefined` here, but having a string
// makes debugging a little clearer.
this.type_ = type || TYPE_SHARED;
this.push = function (data) {
// Any "shared" rollover streams will accept _all_ data. Otherwise,
// streams will only accept data that matches their type.
if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {
return;
}
if (referenceDTS === undefined) {
referenceDTS = data.dts;
}
data.dts = handleRollover(data.dts, referenceDTS);
data.pts = handleRollover(data.pts, referenceDTS);
lastDTS = data.dts;
this.trigger('data', data);
};
this.flush = function () {
referenceDTS = lastDTS;
this.trigger('done');
};
this.endTimeline = function () {
this.flush();
this.trigger('endedtimeline');
};
this.discontinuity = function () {
referenceDTS = void 0;
lastDTS = void 0;
};
this.reset = function () {
this.discontinuity();
this.trigger('reset');
};
};
TimestampRolloverStream.prototype = new Stream();
module.exports = {
TimestampRolloverStream: TimestampRolloverStream,
handleRollover: handleRollover
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Accepts program elementary stream (PES) data events and corrects
* decode and presentation time stamps to account for a rollover
* of the 33 bit value.
*/
'use strict';
var Stream = require('../utils/stream');
var MAX_TS = 8589934592;
var RO_THRESH = 4294967296;
var TYPE_SHARED = 'shared';
var handleRollover = function handleRollover(value, reference) {
var direction = 1;
if (value > reference) {
// If the current timestamp value is greater than our reference timestamp and we detect a
// timestamp rollover, this means the roll over is happening in the opposite direction.
// Example scenario: Enter a long stream/video just after a rollover occurred. The reference
// point will be set to a small number, e.g. 1. The user then seeks backwards over the
// rollover point. In loading this segment, the timestamp values will be very large,
// e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust
// the time stamp to be `value - 2^33`.
direction = -1;
} // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will
// cause an incorrect adjustment.
while (Math.abs(reference - value) > RO_THRESH) {
value += direction * MAX_TS;
}
return value;
};
var TimestampRolloverStream = function TimestampRolloverStream(type) {
var lastDTS, referenceDTS;
TimestampRolloverStream.prototype.init.call(this); // The "shared" type is used in cases where a stream will contain muxed
// video and audio. We could use `undefined` here, but having a string
// makes debugging a little clearer.
this.type_ = type || TYPE_SHARED;
this.push = function (data) {
// Any "shared" rollover streams will accept _all_ data. Otherwise,
// streams will only accept data that matches their type.
if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {
return;
}
if (referenceDTS === undefined) {
referenceDTS = data.dts;
}
data.dts = handleRollover(data.dts, referenceDTS);
data.pts = handleRollover(data.pts, referenceDTS);
lastDTS = data.dts;
this.trigger('data', data);
};
this.flush = function () {
referenceDTS = lastDTS;
this.trigger('done');
};
this.endTimeline = function () {
this.flush();
this.trigger('endedtimeline');
};
this.discontinuity = function () {
referenceDTS = void 0;
lastDTS = void 0;
};
this.reset = function () {
this.discontinuity();
this.trigger('reset');
};
};
TimestampRolloverStream.prototype = new Stream();
module.exports = {
TimestampRolloverStream: TimestampRolloverStream,
handleRollover: handleRollover
};

294
node_modules/mux.js/cjs/mp4/audio-frame-utils.js generated vendored
View file

@ -1,148 +1,148 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var coneOfSilence = require('../data/silence');
var clock = require('../utils/clock');
/**
* Sum the `byteLength` properties of the data in each AAC frame
*/
var sumFrameByteLengths = function sumFrameByteLengths(array) {
var i,
currentObj,
sum = 0; // sum the byteLength's all each nal unit in the frame
for (i = 0; i < array.length; i++) {
currentObj = array[i];
sum += currentObj.data.byteLength;
}
return sum;
}; // Possibly pad (prefix) the audio track with silence if appending this track
// would lead to the introduction of a gap in the audio buffer
var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {
var baseMediaDecodeTimeTs,
frameDuration = 0,
audioGapDuration = 0,
audioFillFrameCount = 0,
audioFillDuration = 0,
silentFrame,
i,
firstFrame;
if (!frames.length) {
return;
}
baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills
frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));
if (audioAppendStartTs && videoBaseMediaDecodeTime) {
// insert the shortest possible amount (audio gap or audio to video gap)
audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap
audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);
audioFillDuration = audioFillFrameCount * frameDuration;
} // don't attempt to fill gaps smaller than a single frame or larger
// than a half second
if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {
return;
}
silentFrame = coneOfSilence()[track.samplerate];
if (!silentFrame) {
// we don't have a silent frame pregenerated for the sample rate, so use a frame
// from the content instead
silentFrame = frames[0].data;
}
for (i = 0; i < audioFillFrameCount; i++) {
firstFrame = frames[0];
frames.splice(0, 0, {
data: silentFrame,
dts: firstFrame.dts - frameDuration,
pts: firstFrame.pts - frameDuration
});
}
track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));
return audioFillDuration;
}; // If the audio segment extends before the earliest allowed dts
// value, remove AAC frames until starts at or after the earliest
// allowed DTS so that we don't end up with a negative baseMedia-
// DecodeTime for the audio track
var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {
if (track.minSegmentDts >= earliestAllowedDts) {
return adtsFrames;
} // We will need to recalculate the earliest segment Dts
track.minSegmentDts = Infinity;
return adtsFrames.filter(function (currentFrame) {
// If this is an allowed frame, keep it and record it's Dts
if (currentFrame.dts >= earliestAllowedDts) {
track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);
track.minSegmentPts = track.minSegmentDts;
return true;
} // Otherwise, discard it
return false;
});
}; // generate the track's raw mdat data from an array of frames
var generateSampleTable = function generateSampleTable(frames) {
var i,
currentFrame,
samples = [];
for (i = 0; i < frames.length; i++) {
currentFrame = frames[i];
samples.push({
size: currentFrame.data.byteLength,
duration: 1024 // For AAC audio, all samples contain 1024 samples
});
}
return samples;
}; // generate the track's sample table from an array of frames
var concatenateFrameData = function concatenateFrameData(frames) {
var i,
currentFrame,
dataOffset = 0,
data = new Uint8Array(sumFrameByteLengths(frames));
for (i = 0; i < frames.length; i++) {
currentFrame = frames[i];
data.set(currentFrame.data, dataOffset);
dataOffset += currentFrame.data.byteLength;
}
return data;
};
module.exports = {
prefixWithSilence: prefixWithSilence,
trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,
generateSampleTable: generateSampleTable,
concatenateFrameData: concatenateFrameData
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var coneOfSilence = require('../data/silence');
var clock = require('../utils/clock');
/**
* Sum the `byteLength` properties of the data in each AAC frame
*/
var sumFrameByteLengths = function sumFrameByteLengths(array) {
var i,
currentObj,
sum = 0; // sum the byteLength's all each nal unit in the frame
for (i = 0; i < array.length; i++) {
currentObj = array[i];
sum += currentObj.data.byteLength;
}
return sum;
}; // Possibly pad (prefix) the audio track with silence if appending this track
// would lead to the introduction of a gap in the audio buffer
var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {
var baseMediaDecodeTimeTs,
frameDuration = 0,
audioGapDuration = 0,
audioFillFrameCount = 0,
audioFillDuration = 0,
silentFrame,
i,
firstFrame;
if (!frames.length) {
return;
}
baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills
frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));
if (audioAppendStartTs && videoBaseMediaDecodeTime) {
// insert the shortest possible amount (audio gap or audio to video gap)
audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap
audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);
audioFillDuration = audioFillFrameCount * frameDuration;
} // don't attempt to fill gaps smaller than a single frame or larger
// than a half second
if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {
return;
}
silentFrame = coneOfSilence()[track.samplerate];
if (!silentFrame) {
// we don't have a silent frame pregenerated for the sample rate, so use a frame
// from the content instead
silentFrame = frames[0].data;
}
for (i = 0; i < audioFillFrameCount; i++) {
firstFrame = frames[0];
frames.splice(0, 0, {
data: silentFrame,
dts: firstFrame.dts - frameDuration,
pts: firstFrame.pts - frameDuration
});
}
track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));
return audioFillDuration;
}; // If the audio segment extends before the earliest allowed dts
// value, remove AAC frames until starts at or after the earliest
// allowed DTS so that we don't end up with a negative baseMedia-
// DecodeTime for the audio track
var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {
if (track.minSegmentDts >= earliestAllowedDts) {
return adtsFrames;
} // We will need to recalculate the earliest segment Dts
track.minSegmentDts = Infinity;
return adtsFrames.filter(function (currentFrame) {
// If this is an allowed frame, keep it and record it's Dts
if (currentFrame.dts >= earliestAllowedDts) {
track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);
track.minSegmentPts = track.minSegmentDts;
return true;
} // Otherwise, discard it
return false;
});
}; // generate the track's raw mdat data from an array of frames
var generateSampleTable = function generateSampleTable(frames) {
var i,
currentFrame,
samples = [];
for (i = 0; i < frames.length; i++) {
currentFrame = frames[i];
samples.push({
size: currentFrame.data.byteLength,
duration: 1024 // For AAC audio, all samples contain 1024 samples
});
}
return samples;
}; // generate the track's sample table from an array of frames
var concatenateFrameData = function concatenateFrameData(frames) {
var i,
currentFrame,
dataOffset = 0,
data = new Uint8Array(sumFrameByteLengths(frames));
for (i = 0; i < frames.length; i++) {
currentFrame = frames[i];
data.set(currentFrame.data, dataOffset);
dataOffset += currentFrame.data.byteLength;
}
return data;
};
module.exports = {
prefixWithSilence: prefixWithSilence,
trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,
generateSampleTable: generateSampleTable,
concatenateFrameData: concatenateFrameData
};

965
node_modules/mux.js/cjs/mp4/caption-parser.js generated vendored
View file

@ -1,480 +1,487 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Reads in-band CEA-708 captions out of FMP4 segments.
* @see https://en.wikipedia.org/wiki/CEA-708
*/
'use strict';
var discardEmulationPreventionBytes = require('../tools/caption-packet-parser').discardEmulationPreventionBytes;
var CaptionStream = require('../m2ts/caption-stream').CaptionStream;
var findBox = require('../mp4/find-box.js');
var parseTfdt = require('../tools/parse-tfdt.js');
var parseTrun = require('../tools/parse-trun.js');
var parseTfhd = require('../tools/parse-tfhd.js');
/**
* Maps an offset in the mdat to a sample based on the the size of the samples.
* Assumes that `parseSamples` has been called first.
*
* @param {Number} offset - The offset into the mdat
* @param {Object[]} samples - An array of samples, parsed using `parseSamples`
* @return {?Object} The matching sample, or null if no match was found.
*
* @see ISO-BMFF-12/2015, Section 8.8.8
**/
var mapToSample = function mapToSample(offset, samples) {
var approximateOffset = offset;
for (var i = 0; i < samples.length; i++) {
var sample = samples[i];
if (approximateOffset < sample.size) {
return sample;
}
approximateOffset -= sample.size;
}
return null;
};
/**
* Finds SEI nal units contained in a Media Data Box.
* Assumes that `parseSamples` has been called first.
*
* @param {Uint8Array} avcStream - The bytes of the mdat
* @param {Object[]} samples - The samples parsed out by `parseSamples`
* @param {Number} trackId - The trackId of this video track
* @return {Object[]} seiNals - the parsed SEI NALUs found.
* The contents of the seiNal should match what is expected by
* CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)
*
* @see ISO-BMFF-12/2015, Section 8.1.1
* @see Rec. ITU-T H.264, 7.3.2.3.1
**/
var findSeiNals = function findSeiNals(avcStream, samples, trackId) {
var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),
result = {
logs: [],
seiNals: []
},
seiNal,
i,
length,
lastMatchedSample;
for (i = 0; i + 4 < avcStream.length; i += length) {
length = avcView.getUint32(i);
i += 4; // Bail if this doesn't appear to be an H264 stream
if (length <= 0) {
continue;
}
switch (avcStream[i] & 0x1F) {
case 0x06:
var data = avcStream.subarray(i + 1, i + 1 + length);
var matchingSample = mapToSample(i, samples);
seiNal = {
nalUnitType: 'sei_rbsp',
size: length,
data: data,
escapedRBSP: discardEmulationPreventionBytes(data),
trackId: trackId
};
if (matchingSample) {
seiNal.pts = matchingSample.pts;
seiNal.dts = matchingSample.dts;
lastMatchedSample = matchingSample;
} else if (lastMatchedSample) {
// If a matching sample cannot be found, use the last
// sample's values as they should be as close as possible
seiNal.pts = lastMatchedSample.pts;
seiNal.dts = lastMatchedSample.dts;
} else {
result.logs.push({
level: 'warn',
message: 'We\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'
});
break;
}
result.seiNals.push(seiNal);
break;
default:
break;
}
}
return result;
};
/**
* Parses sample information out of Track Run Boxes and calculates
* the absolute presentation and decode timestamps of each sample.
*
* @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed
* @param {Number} baseMediaDecodeTime - base media decode time from tfdt
@see ISO-BMFF-12/2015, Section 8.8.12
* @param {Object} tfhd - The parsed Track Fragment Header
* @see inspect.parseTfhd
* @return {Object[]} the parsed samples
*
* @see ISO-BMFF-12/2015, Section 8.8.8
**/
var parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {
var currentDts = baseMediaDecodeTime;
var defaultSampleDuration = tfhd.defaultSampleDuration || 0;
var defaultSampleSize = tfhd.defaultSampleSize || 0;
var trackId = tfhd.trackId;
var allSamples = [];
truns.forEach(function (trun) {
// Note: We currently do not parse the sample table as well
// as the trun. It's possible some sources will require this.
// moov > trak > mdia > minf > stbl
var trackRun = parseTrun(trun);
var samples = trackRun.samples;
samples.forEach(function (sample) {
if (sample.duration === undefined) {
sample.duration = defaultSampleDuration;
}
if (sample.size === undefined) {
sample.size = defaultSampleSize;
}
sample.trackId = trackId;
sample.dts = currentDts;
if (sample.compositionTimeOffset === undefined) {
sample.compositionTimeOffset = 0;
}
sample.pts = currentDts + sample.compositionTimeOffset;
currentDts += sample.duration;
});
allSamples = allSamples.concat(samples);
});
return allSamples;
};
/**
* Parses out caption nals from an FMP4 segment's video tracks.
*
* @param {Uint8Array} segment - The bytes of a single segment
* @param {Number} videoTrackId - The trackId of a video track in the segment
* @return {Object.<Number, Object[]>} A mapping of video trackId to
* a list of seiNals found in that track
**/
var parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {
// To get the samples
var trafs = findBox(segment, ['moof', 'traf']); // To get SEI NAL units
var mdats = findBox(segment, ['mdat']);
var captionNals = {};
var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs
mdats.forEach(function (mdat, index) {
var matchingTraf = trafs[index];
mdatTrafPairs.push({
mdat: mdat,
traf: matchingTraf
});
});
mdatTrafPairs.forEach(function (pair) {
var mdat = pair.mdat;
var traf = pair.traf;
var tfhd = findBox(traf, ['tfhd']); // Exactly 1 tfhd per traf
var headerInfo = parseTfhd(tfhd[0]);
var trackId = headerInfo.trackId;
var tfdt = findBox(traf, ['tfdt']); // Either 0 or 1 tfdt per traf
var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;
var truns = findBox(traf, ['trun']);
var samples;
var result; // Only parse video data for the chosen video track
if (videoTrackId === trackId && truns.length > 0) {
samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);
result = findSeiNals(mdat, samples, trackId);
if (!captionNals[trackId]) {
captionNals[trackId] = {
seiNals: [],
logs: []
};
}
captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);
captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);
}
});
return captionNals;
};
/**
* Parses out inband captions from an MP4 container and returns
* caption objects that can be used by WebVTT and the TextTrack API.
* @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue
* @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack
* Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first
*
* @param {Uint8Array} segment - The fmp4 segment containing embedded captions
* @param {Number} trackId - The id of the video track to parse
* @param {Number} timescale - The timescale for the video track from the init segment
*
* @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks
* @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds
* @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds
* @return {String} parsedCaptions[].text - The visible content of the caption
**/
var parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {
var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there
if (trackId === null) {
return null;
}
captionNals = parseCaptionNals(segment, trackId);
var trackNals = captionNals[trackId] || {};
return {
seiNals: trackNals.seiNals,
logs: trackNals.logs,
timescale: timescale
};
};
/**
* Converts SEI NALUs into captions that can be used by video.js
**/
var CaptionParser = function CaptionParser() {
var isInitialized = false;
var captionStream; // Stores segments seen before trackId and timescale are set
var segmentCache; // Stores video track ID of the track being parsed
var trackId; // Stores the timescale of the track being parsed
var timescale; // Stores captions parsed so far
var parsedCaptions; // Stores whether we are receiving partial data or not
var parsingPartial;
/**
* A method to indicate whether a CaptionParser has been initalized
* @returns {Boolean}
**/
this.isInitialized = function () {
return isInitialized;
};
/**
* Initializes the underlying CaptionStream, SEI NAL parsing
* and management, and caption collection
**/
this.init = function (options) {
captionStream = new CaptionStream();
isInitialized = true;
parsingPartial = options ? options.isPartial : false; // Collect dispatched captions
captionStream.on('data', function (event) {
// Convert to seconds in the source's timescale
event.startTime = event.startPts / timescale;
event.endTime = event.endPts / timescale;
parsedCaptions.captions.push(event);
parsedCaptions.captionStreams[event.stream] = true;
});
captionStream.on('log', function (log) {
parsedCaptions.logs.push(log);
});
};
/**
* Determines if a new video track will be selected
* or if the timescale changed
* @return {Boolean}
**/
this.isNewInit = function (videoTrackIds, timescales) {
if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {
return false;
}
return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];
};
/**
* Parses out SEI captions and interacts with underlying
* CaptionStream to return dispatched captions
*
* @param {Uint8Array} segment - The fmp4 segment containing embedded captions
* @param {Number[]} videoTrackIds - A list of video tracks found in the init segment
* @param {Object.<Number, Number>} timescales - The timescales found in the init segment
* @see parseEmbeddedCaptions
* @see m2ts/caption-stream.js
**/
this.parse = function (segment, videoTrackIds, timescales) {
var parsedData;
if (!this.isInitialized()) {
return null; // This is not likely to be a video segment
} else if (!videoTrackIds || !timescales) {
return null;
} else if (this.isNewInit(videoTrackIds, timescales)) {
// Use the first video track only as there is no
// mechanism to switch to other video tracks
trackId = videoTrackIds[0];
timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment
// data until we have one.
// the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there
} else if (trackId === null || !timescale) {
segmentCache.push(segment);
return null;
} // Now that a timescale and trackId is set, parse cached segments
while (segmentCache.length > 0) {
var cachedSegment = segmentCache.shift();
this.parse(cachedSegment, videoTrackIds, timescales);
}
parsedData = parseEmbeddedCaptions(segment, trackId, timescale);
if (parsedData && parsedData.logs) {
parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);
}
if (parsedData === null || !parsedData.seiNals) {
if (parsedCaptions.logs.length) {
return {
logs: parsedCaptions.logs,
captions: [],
captionStreams: []
};
}
return null;
}
this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched
this.flushStream();
return parsedCaptions;
};
/**
* Pushes SEI NALUs onto CaptionStream
* @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`
* Assumes that `parseCaptionNals` has been called first
* @see m2ts/caption-stream.js
**/
this.pushNals = function (nals) {
if (!this.isInitialized() || !nals || nals.length === 0) {
return null;
}
nals.forEach(function (nal) {
captionStream.push(nal);
});
};
/**
* Flushes underlying CaptionStream to dispatch processed, displayable captions
* @see m2ts/caption-stream.js
**/
this.flushStream = function () {
if (!this.isInitialized()) {
return null;
}
if (!parsingPartial) {
captionStream.flush();
} else {
captionStream.partialFlush();
}
};
/**
* Reset caption buckets for new data
**/
this.clearParsedCaptions = function () {
parsedCaptions.captions = [];
parsedCaptions.captionStreams = {};
parsedCaptions.logs = [];
};
/**
* Resets underlying CaptionStream
* @see m2ts/caption-stream.js
**/
this.resetCaptionStream = function () {
if (!this.isInitialized()) {
return null;
}
captionStream.reset();
};
/**
* Convenience method to clear all captions flushed from the
* CaptionStream and still being parsed
* @see m2ts/caption-stream.js
**/
this.clearAllCaptions = function () {
this.clearParsedCaptions();
this.resetCaptionStream();
};
/**
* Reset caption parser
**/
this.reset = function () {
segmentCache = [];
trackId = null;
timescale = null;
if (!parsedCaptions) {
parsedCaptions = {
captions: [],
// CC1, CC2, CC3, CC4
captionStreams: {},
logs: []
};
} else {
this.clearParsedCaptions();
}
this.resetCaptionStream();
};
this.reset();
};
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Reads in-band CEA-708 captions out of FMP4 segments.
* @see https://en.wikipedia.org/wiki/CEA-708
*/
'use strict';
var discardEmulationPreventionBytes = require('../tools/caption-packet-parser').discardEmulationPreventionBytes;
var CaptionStream = require('../m2ts/caption-stream').CaptionStream;
var findBox = require('../mp4/find-box.js');
var parseTfdt = require('../tools/parse-tfdt.js');
var parseTrun = require('../tools/parse-trun.js');
var parseTfhd = require('../tools/parse-tfhd.js');
var window = require('global/window');
/**
* Maps an offset in the mdat to a sample based on the the size of the samples.
* Assumes that `parseSamples` has been called first.
*
* @param {Number} offset - The offset into the mdat
* @param {Object[]} samples - An array of samples, parsed using `parseSamples`
* @return {?Object} The matching sample, or null if no match was found.
*
* @see ISO-BMFF-12/2015, Section 8.8.8
**/
var mapToSample = function mapToSample(offset, samples) {
var approximateOffset = offset;
for (var i = 0; i < samples.length; i++) {
var sample = samples[i];
if (approximateOffset < sample.size) {
return sample;
}
approximateOffset -= sample.size;
}
return null;
};
/**
* Finds SEI nal units contained in a Media Data Box.
* Assumes that `parseSamples` has been called first.
*
* @param {Uint8Array} avcStream - The bytes of the mdat
* @param {Object[]} samples - The samples parsed out by `parseSamples`
* @param {Number} trackId - The trackId of this video track
* @return {Object[]} seiNals - the parsed SEI NALUs found.
* The contents of the seiNal should match what is expected by
* CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)
*
* @see ISO-BMFF-12/2015, Section 8.1.1
* @see Rec. ITU-T H.264, 7.3.2.3.1
**/
var findSeiNals = function findSeiNals(avcStream, samples, trackId) {
var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),
result = {
logs: [],
seiNals: []
},
seiNal,
i,
length,
lastMatchedSample;
for (i = 0; i + 4 < avcStream.length; i += length) {
length = avcView.getUint32(i);
i += 4; // Bail if this doesn't appear to be an H264 stream
if (length <= 0) {
continue;
}
switch (avcStream[i] & 0x1F) {
case 0x06:
var data = avcStream.subarray(i + 1, i + 1 + length);
var matchingSample = mapToSample(i, samples);
seiNal = {
nalUnitType: 'sei_rbsp',
size: length,
data: data,
escapedRBSP: discardEmulationPreventionBytes(data),
trackId: trackId
};
if (matchingSample) {
seiNal.pts = matchingSample.pts;
seiNal.dts = matchingSample.dts;
lastMatchedSample = matchingSample;
} else if (lastMatchedSample) {
// If a matching sample cannot be found, use the last
// sample's values as they should be as close as possible
seiNal.pts = lastMatchedSample.pts;
seiNal.dts = lastMatchedSample.dts;
} else {
result.logs.push({
level: 'warn',
message: 'We\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'
});
break;
}
result.seiNals.push(seiNal);
break;
default:
break;
}
}
return result;
};
/**
* Parses sample information out of Track Run Boxes and calculates
* the absolute presentation and decode timestamps of each sample.
*
* @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed
* @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt
@see ISO-BMFF-12/2015, Section 8.8.12
* @param {Object} tfhd - The parsed Track Fragment Header
* @see inspect.parseTfhd
* @return {Object[]} the parsed samples
*
* @see ISO-BMFF-12/2015, Section 8.8.8
**/
var parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {
var currentDts = baseMediaDecodeTime;
var defaultSampleDuration = tfhd.defaultSampleDuration || 0;
var defaultSampleSize = tfhd.defaultSampleSize || 0;
var trackId = tfhd.trackId;
var allSamples = [];
truns.forEach(function (trun) {
// Note: We currently do not parse the sample table as well
// as the trun. It's possible some sources will require this.
// moov > trak > mdia > minf > stbl
var trackRun = parseTrun(trun);
var samples = trackRun.samples;
samples.forEach(function (sample) {
if (sample.duration === undefined) {
sample.duration = defaultSampleDuration;
}
if (sample.size === undefined) {
sample.size = defaultSampleSize;
}
sample.trackId = trackId;
sample.dts = currentDts;
if (sample.compositionTimeOffset === undefined) {
sample.compositionTimeOffset = 0;
}
if (typeof currentDts === 'bigint') {
sample.pts = currentDts + window.BigInt(sample.compositionTimeOffset);
currentDts += window.BigInt(sample.duration);
} else {
sample.pts = currentDts + sample.compositionTimeOffset;
currentDts += sample.duration;
}
});
allSamples = allSamples.concat(samples);
});
return allSamples;
};
/**
* Parses out caption nals from an FMP4 segment's video tracks.
*
* @param {Uint8Array} segment - The bytes of a single segment
* @param {Number} videoTrackId - The trackId of a video track in the segment
* @return {Object.<Number, Object[]>} A mapping of video trackId to
* a list of seiNals found in that track
**/
var parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {
// To get the samples
var trafs = findBox(segment, ['moof', 'traf']); // To get SEI NAL units
var mdats = findBox(segment, ['mdat']);
var captionNals = {};
var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs
mdats.forEach(function (mdat, index) {
var matchingTraf = trafs[index];
mdatTrafPairs.push({
mdat: mdat,
traf: matchingTraf
});
});
mdatTrafPairs.forEach(function (pair) {
var mdat = pair.mdat;
var traf = pair.traf;
var tfhd = findBox(traf, ['tfhd']); // Exactly 1 tfhd per traf
var headerInfo = parseTfhd(tfhd[0]);
var trackId = headerInfo.trackId;
var tfdt = findBox(traf, ['tfdt']); // Either 0 or 1 tfdt per traf
var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;
var truns = findBox(traf, ['trun']);
var samples;
var result; // Only parse video data for the chosen video track
if (videoTrackId === trackId && truns.length > 0) {
samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);
result = findSeiNals(mdat, samples, trackId);
if (!captionNals[trackId]) {
captionNals[trackId] = {
seiNals: [],
logs: []
};
}
captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);
captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);
}
});
return captionNals;
};
/**
* Parses out inband captions from an MP4 container and returns
* caption objects that can be used by WebVTT and the TextTrack API.
* @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue
* @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack
* Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first
*
* @param {Uint8Array} segment - The fmp4 segment containing embedded captions
* @param {Number} trackId - The id of the video track to parse
* @param {Number} timescale - The timescale for the video track from the init segment
*
* @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks
* @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds
* @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds
* @return {String} parsedCaptions[].text - The visible content of the caption
**/
var parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {
var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there
if (trackId === null) {
return null;
}
captionNals = parseCaptionNals(segment, trackId);
var trackNals = captionNals[trackId] || {};
return {
seiNals: trackNals.seiNals,
logs: trackNals.logs,
timescale: timescale
};
};
/**
* Converts SEI NALUs into captions that can be used by video.js
**/
var CaptionParser = function CaptionParser() {
var isInitialized = false;
var captionStream; // Stores segments seen before trackId and timescale are set
var segmentCache; // Stores video track ID of the track being parsed
var trackId; // Stores the timescale of the track being parsed
var timescale; // Stores captions parsed so far
var parsedCaptions; // Stores whether we are receiving partial data or not
var parsingPartial;
/**
* A method to indicate whether a CaptionParser has been initalized
* @returns {Boolean}
**/
this.isInitialized = function () {
return isInitialized;
};
/**
* Initializes the underlying CaptionStream, SEI NAL parsing
* and management, and caption collection
**/
this.init = function (options) {
captionStream = new CaptionStream();
isInitialized = true;
parsingPartial = options ? options.isPartial : false; // Collect dispatched captions
captionStream.on('data', function (event) {
// Convert to seconds in the source's timescale
event.startTime = event.startPts / timescale;
event.endTime = event.endPts / timescale;
parsedCaptions.captions.push(event);
parsedCaptions.captionStreams[event.stream] = true;
});
captionStream.on('log', function (log) {
parsedCaptions.logs.push(log);
});
};
/**
* Determines if a new video track will be selected
* or if the timescale changed
* @return {Boolean}
**/
this.isNewInit = function (videoTrackIds, timescales) {
if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {
return false;
}
return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];
};
/**
* Parses out SEI captions and interacts with underlying
* CaptionStream to return dispatched captions
*
* @param {Uint8Array} segment - The fmp4 segment containing embedded captions
* @param {Number[]} videoTrackIds - A list of video tracks found in the init segment
* @param {Object.<Number, Number>} timescales - The timescales found in the init segment
* @see parseEmbeddedCaptions
* @see m2ts/caption-stream.js
**/
this.parse = function (segment, videoTrackIds, timescales) {
var parsedData;
if (!this.isInitialized()) {
return null; // This is not likely to be a video segment
} else if (!videoTrackIds || !timescales) {
return null;
} else if (this.isNewInit(videoTrackIds, timescales)) {
// Use the first video track only as there is no
// mechanism to switch to other video tracks
trackId = videoTrackIds[0];
timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment
// data until we have one.
// the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there
} else if (trackId === null || !timescale) {
segmentCache.push(segment);
return null;
} // Now that a timescale and trackId is set, parse cached segments
while (segmentCache.length > 0) {
var cachedSegment = segmentCache.shift();
this.parse(cachedSegment, videoTrackIds, timescales);
}
parsedData = parseEmbeddedCaptions(segment, trackId, timescale);
if (parsedData && parsedData.logs) {
parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);
}
if (parsedData === null || !parsedData.seiNals) {
if (parsedCaptions.logs.length) {
return {
logs: parsedCaptions.logs,
captions: [],
captionStreams: []
};
}
return null;
}
this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched
this.flushStream();
return parsedCaptions;
};
/**
* Pushes SEI NALUs onto CaptionStream
* @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`
* Assumes that `parseCaptionNals` has been called first
* @see m2ts/caption-stream.js
**/
this.pushNals = function (nals) {
if (!this.isInitialized() || !nals || nals.length === 0) {
return null;
}
nals.forEach(function (nal) {
captionStream.push(nal);
});
};
/**
* Flushes underlying CaptionStream to dispatch processed, displayable captions
* @see m2ts/caption-stream.js
**/
this.flushStream = function () {
if (!this.isInitialized()) {
return null;
}
if (!parsingPartial) {
captionStream.flush();
} else {
captionStream.partialFlush();
}
};
/**
* Reset caption buckets for new data
**/
this.clearParsedCaptions = function () {
parsedCaptions.captions = [];
parsedCaptions.captionStreams = {};
parsedCaptions.logs = [];
};
/**
* Resets underlying CaptionStream
* @see m2ts/caption-stream.js
**/
this.resetCaptionStream = function () {
if (!this.isInitialized()) {
return null;
}
captionStream.reset();
};
/**
* Convenience method to clear all captions flushed from the
* CaptionStream and still being parsed
* @see m2ts/caption-stream.js
**/
this.clearAllCaptions = function () {
this.clearParsedCaptions();
this.resetCaptionStream();
};
/**
* Reset caption parser
**/
this.reset = function () {
segmentCache = [];
trackId = null;
timescale = null;
if (!parsedCaptions) {
parsedCaptions = {
captions: [],
// CC1, CC2, CC3, CC4
captionStreams: {},
logs: []
};
} else {
this.clearParsedCaptions();
}
this.resetCaptionStream();
};
this.reset();
};
module.exports = CaptionParser;

92
node_modules/mux.js/cjs/mp4/find-box.js generated vendored
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@ -1,47 +1,47 @@
"use strict";
var toUnsigned = require('../utils/bin').toUnsigned;
var parseType = require('./parse-type.js');
var findBox = function findBox(data, path) {
var results = [],
i,
size,
type,
end,
subresults;
if (!path.length) {
// short-circuit the search for empty paths
return null;
}
for (i = 0; i < data.byteLength;) {
size = toUnsigned(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);
type = parseType(data.subarray(i + 4, i + 8));
end = size > 1 ? i + size : data.byteLength;
if (type === path[0]) {
if (path.length === 1) {
// this is the end of the path and we've found the box we were
// looking for
results.push(data.subarray(i + 8, end));
} else {
// recursively search for the next box along the path
subresults = findBox(data.subarray(i + 8, end), path.slice(1));
if (subresults.length) {
results = results.concat(subresults);
}
}
}
i = end;
} // we've finished searching all of data
return results;
};
"use strict";
var toUnsigned = require('../utils/bin').toUnsigned;
var parseType = require('./parse-type.js');
var findBox = function findBox(data, path) {
var results = [],
i,
size,
type,
end,
subresults;
if (!path.length) {
// short-circuit the search for empty paths
return null;
}
for (i = 0; i < data.byteLength;) {
size = toUnsigned(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);
type = parseType(data.subarray(i + 4, i + 8));
end = size > 1 ? i + size : data.byteLength;
if (type === path[0]) {
if (path.length === 1) {
// this is the end of the path and we've found the box we were
// looking for
results.push(data.subarray(i + 8, end));
} else {
// recursively search for the next box along the path
subresults = findBox(data.subarray(i + 8, end), path.slice(1));
if (subresults.length) {
results = results.concat(subresults);
}
}
}
i = end;
} // we've finished searching all of data
return results;
};
module.exports = findBox;

606
node_modules/mux.js/cjs/mp4/frame-utils.js generated vendored
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@ -1,304 +1,304 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
// Convert an array of nal units into an array of frames with each frame being
// composed of the nal units that make up that frame
// Also keep track of cummulative data about the frame from the nal units such
// as the frame duration, starting pts, etc.
var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {
var i,
currentNal,
currentFrame = [],
frames = []; // TODO added for LHLS, make sure this is OK
frames.byteLength = 0;
frames.nalCount = 0;
frames.duration = 0;
currentFrame.byteLength = 0;
for (i = 0; i < nalUnits.length; i++) {
currentNal = nalUnits[i]; // Split on 'aud'-type nal units
if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {
// Since the very first nal unit is expected to be an AUD
// only push to the frames array when currentFrame is not empty
if (currentFrame.length) {
currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK
frames.byteLength += currentFrame.byteLength;
frames.nalCount += currentFrame.length;
frames.duration += currentFrame.duration;
frames.push(currentFrame);
}
currentFrame = [currentNal];
currentFrame.byteLength = currentNal.data.byteLength;
currentFrame.pts = currentNal.pts;
currentFrame.dts = currentNal.dts;
} else {
// Specifically flag key frames for ease of use later
if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {
currentFrame.keyFrame = true;
}
currentFrame.duration = currentNal.dts - currentFrame.dts;
currentFrame.byteLength += currentNal.data.byteLength;
currentFrame.push(currentNal);
}
} // For the last frame, use the duration of the previous frame if we
// have nothing better to go on
if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {
currentFrame.duration = frames[frames.length - 1].duration;
} // Push the final frame
// TODO added for LHLS, make sure this is OK
frames.byteLength += currentFrame.byteLength;
frames.nalCount += currentFrame.length;
frames.duration += currentFrame.duration;
frames.push(currentFrame);
return frames;
}; // Convert an array of frames into an array of Gop with each Gop being composed
// of the frames that make up that Gop
// Also keep track of cummulative data about the Gop from the frames such as the
// Gop duration, starting pts, etc.
var groupFramesIntoGops = function groupFramesIntoGops(frames) {
var i,
currentFrame,
currentGop = [],
gops = []; // We must pre-set some of the values on the Gop since we
// keep running totals of these values
currentGop.byteLength = 0;
currentGop.nalCount = 0;
currentGop.duration = 0;
currentGop.pts = frames[0].pts;
currentGop.dts = frames[0].dts; // store some metadata about all the Gops
gops.byteLength = 0;
gops.nalCount = 0;
gops.duration = 0;
gops.pts = frames[0].pts;
gops.dts = frames[0].dts;
for (i = 0; i < frames.length; i++) {
currentFrame = frames[i];
if (currentFrame.keyFrame) {
// Since the very first frame is expected to be an keyframe
// only push to the gops array when currentGop is not empty
if (currentGop.length) {
gops.push(currentGop);
gops.byteLength += currentGop.byteLength;
gops.nalCount += currentGop.nalCount;
gops.duration += currentGop.duration;
}
currentGop = [currentFrame];
currentGop.nalCount = currentFrame.length;
currentGop.byteLength = currentFrame.byteLength;
currentGop.pts = currentFrame.pts;
currentGop.dts = currentFrame.dts;
currentGop.duration = currentFrame.duration;
} else {
currentGop.duration += currentFrame.duration;
currentGop.nalCount += currentFrame.length;
currentGop.byteLength += currentFrame.byteLength;
currentGop.push(currentFrame);
}
}
if (gops.length && currentGop.duration <= 0) {
currentGop.duration = gops[gops.length - 1].duration;
}
gops.byteLength += currentGop.byteLength;
gops.nalCount += currentGop.nalCount;
gops.duration += currentGop.duration; // push the final Gop
gops.push(currentGop);
return gops;
};
/*
* Search for the first keyframe in the GOPs and throw away all frames
* until that keyframe. Then extend the duration of the pulled keyframe
* and pull the PTS and DTS of the keyframe so that it covers the time
* range of the frames that were disposed.
*
* @param {Array} gops video GOPs
* @returns {Array} modified video GOPs
*/
var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {
var currentGop;
if (!gops[0][0].keyFrame && gops.length > 1) {
// Remove the first GOP
currentGop = gops.shift();
gops.byteLength -= currentGop.byteLength;
gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the
// first gop to cover the time period of the
// frames we just removed
gops[0][0].dts = currentGop.dts;
gops[0][0].pts = currentGop.pts;
gops[0][0].duration += currentGop.duration;
}
return gops;
};
/**
* Default sample object
* see ISO/IEC 14496-12:2012, section 8.6.4.3
*/
var createDefaultSample = function createDefaultSample() {
return {
size: 0,
flags: {
isLeading: 0,
dependsOn: 1,
isDependedOn: 0,
hasRedundancy: 0,
degradationPriority: 0,
isNonSyncSample: 1
}
};
};
/*
* Collates information from a video frame into an object for eventual
* entry into an MP4 sample table.
*
* @param {Object} frame the video frame
* @param {Number} dataOffset the byte offset to position the sample
* @return {Object} object containing sample table info for a frame
*/
var sampleForFrame = function sampleForFrame(frame, dataOffset) {
var sample = createDefaultSample();
sample.dataOffset = dataOffset;
sample.compositionTimeOffset = frame.pts - frame.dts;
sample.duration = frame.duration;
sample.size = 4 * frame.length; // Space for nal unit size
sample.size += frame.byteLength;
if (frame.keyFrame) {
sample.flags.dependsOn = 2;
sample.flags.isNonSyncSample = 0;
}
return sample;
}; // generate the track's sample table from an array of gops
var generateSampleTable = function generateSampleTable(gops, baseDataOffset) {
var h,
i,
sample,
currentGop,
currentFrame,
dataOffset = baseDataOffset || 0,
samples = [];
for (h = 0; h < gops.length; h++) {
currentGop = gops[h];
for (i = 0; i < currentGop.length; i++) {
currentFrame = currentGop[i];
sample = sampleForFrame(currentFrame, dataOffset);
dataOffset += sample.size;
samples.push(sample);
}
}
return samples;
}; // generate the track's raw mdat data from an array of gops
var concatenateNalData = function concatenateNalData(gops) {
var h,
i,
j,
currentGop,
currentFrame,
currentNal,
dataOffset = 0,
nalsByteLength = gops.byteLength,
numberOfNals = gops.nalCount,
totalByteLength = nalsByteLength + 4 * numberOfNals,
data = new Uint8Array(totalByteLength),
view = new DataView(data.buffer); // For each Gop..
for (h = 0; h < gops.length; h++) {
currentGop = gops[h]; // For each Frame..
for (i = 0; i < currentGop.length; i++) {
currentFrame = currentGop[i]; // For each NAL..
for (j = 0; j < currentFrame.length; j++) {
currentNal = currentFrame[j];
view.setUint32(dataOffset, currentNal.data.byteLength);
dataOffset += 4;
data.set(currentNal.data, dataOffset);
dataOffset += currentNal.data.byteLength;
}
}
}
return data;
}; // generate the track's sample table from a frame
var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {
var sample,
dataOffset = baseDataOffset || 0,
samples = [];
sample = sampleForFrame(frame, dataOffset);
samples.push(sample);
return samples;
}; // generate the track's raw mdat data from a frame
var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {
var i,
currentNal,
dataOffset = 0,
nalsByteLength = frame.byteLength,
numberOfNals = frame.length,
totalByteLength = nalsByteLength + 4 * numberOfNals,
data = new Uint8Array(totalByteLength),
view = new DataView(data.buffer); // For each NAL..
for (i = 0; i < frame.length; i++) {
currentNal = frame[i];
view.setUint32(dataOffset, currentNal.data.byteLength);
dataOffset += 4;
data.set(currentNal.data, dataOffset);
dataOffset += currentNal.data.byteLength;
}
return data;
};
module.exports = {
groupNalsIntoFrames: groupNalsIntoFrames,
groupFramesIntoGops: groupFramesIntoGops,
extendFirstKeyFrame: extendFirstKeyFrame,
generateSampleTable: generateSampleTable,
concatenateNalData: concatenateNalData,
generateSampleTableForFrame: generateSampleTableForFrame,
concatenateNalDataForFrame: concatenateNalDataForFrame
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
// Convert an array of nal units into an array of frames with each frame being
// composed of the nal units that make up that frame
// Also keep track of cummulative data about the frame from the nal units such
// as the frame duration, starting pts, etc.
var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {
var i,
currentNal,
currentFrame = [],
frames = []; // TODO added for LHLS, make sure this is OK
frames.byteLength = 0;
frames.nalCount = 0;
frames.duration = 0;
currentFrame.byteLength = 0;
for (i = 0; i < nalUnits.length; i++) {
currentNal = nalUnits[i]; // Split on 'aud'-type nal units
if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {
// Since the very first nal unit is expected to be an AUD
// only push to the frames array when currentFrame is not empty
if (currentFrame.length) {
currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK
frames.byteLength += currentFrame.byteLength;
frames.nalCount += currentFrame.length;
frames.duration += currentFrame.duration;
frames.push(currentFrame);
}
currentFrame = [currentNal];
currentFrame.byteLength = currentNal.data.byteLength;
currentFrame.pts = currentNal.pts;
currentFrame.dts = currentNal.dts;
} else {
// Specifically flag key frames for ease of use later
if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {
currentFrame.keyFrame = true;
}
currentFrame.duration = currentNal.dts - currentFrame.dts;
currentFrame.byteLength += currentNal.data.byteLength;
currentFrame.push(currentNal);
}
} // For the last frame, use the duration of the previous frame if we
// have nothing better to go on
if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {
currentFrame.duration = frames[frames.length - 1].duration;
} // Push the final frame
// TODO added for LHLS, make sure this is OK
frames.byteLength += currentFrame.byteLength;
frames.nalCount += currentFrame.length;
frames.duration += currentFrame.duration;
frames.push(currentFrame);
return frames;
}; // Convert an array of frames into an array of Gop with each Gop being composed
// of the frames that make up that Gop
// Also keep track of cummulative data about the Gop from the frames such as the
// Gop duration, starting pts, etc.
var groupFramesIntoGops = function groupFramesIntoGops(frames) {
var i,
currentFrame,
currentGop = [],
gops = []; // We must pre-set some of the values on the Gop since we
// keep running totals of these values
currentGop.byteLength = 0;
currentGop.nalCount = 0;
currentGop.duration = 0;
currentGop.pts = frames[0].pts;
currentGop.dts = frames[0].dts; // store some metadata about all the Gops
gops.byteLength = 0;
gops.nalCount = 0;
gops.duration = 0;
gops.pts = frames[0].pts;
gops.dts = frames[0].dts;
for (i = 0; i < frames.length; i++) {
currentFrame = frames[i];
if (currentFrame.keyFrame) {
// Since the very first frame is expected to be an keyframe
// only push to the gops array when currentGop is not empty
if (currentGop.length) {
gops.push(currentGop);
gops.byteLength += currentGop.byteLength;
gops.nalCount += currentGop.nalCount;
gops.duration += currentGop.duration;
}
currentGop = [currentFrame];
currentGop.nalCount = currentFrame.length;
currentGop.byteLength = currentFrame.byteLength;
currentGop.pts = currentFrame.pts;
currentGop.dts = currentFrame.dts;
currentGop.duration = currentFrame.duration;
} else {
currentGop.duration += currentFrame.duration;
currentGop.nalCount += currentFrame.length;
currentGop.byteLength += currentFrame.byteLength;
currentGop.push(currentFrame);
}
}
if (gops.length && currentGop.duration <= 0) {
currentGop.duration = gops[gops.length - 1].duration;
}
gops.byteLength += currentGop.byteLength;
gops.nalCount += currentGop.nalCount;
gops.duration += currentGop.duration; // push the final Gop
gops.push(currentGop);
return gops;
};
/*
* Search for the first keyframe in the GOPs and throw away all frames
* until that keyframe. Then extend the duration of the pulled keyframe
* and pull the PTS and DTS of the keyframe so that it covers the time
* range of the frames that were disposed.
*
* @param {Array} gops video GOPs
* @returns {Array} modified video GOPs
*/
var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {
var currentGop;
if (!gops[0][0].keyFrame && gops.length > 1) {
// Remove the first GOP
currentGop = gops.shift();
gops.byteLength -= currentGop.byteLength;
gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the
// first gop to cover the time period of the
// frames we just removed
gops[0][0].dts = currentGop.dts;
gops[0][0].pts = currentGop.pts;
gops[0][0].duration += currentGop.duration;
}
return gops;
};
/**
* Default sample object
* see ISO/IEC 14496-12:2012, section 8.6.4.3
*/
var createDefaultSample = function createDefaultSample() {
return {
size: 0,
flags: {
isLeading: 0,
dependsOn: 1,
isDependedOn: 0,
hasRedundancy: 0,
degradationPriority: 0,
isNonSyncSample: 1
}
};
};
/*
* Collates information from a video frame into an object for eventual
* entry into an MP4 sample table.
*
* @param {Object} frame the video frame
* @param {Number} dataOffset the byte offset to position the sample
* @return {Object} object containing sample table info for a frame
*/
var sampleForFrame = function sampleForFrame(frame, dataOffset) {
var sample = createDefaultSample();
sample.dataOffset = dataOffset;
sample.compositionTimeOffset = frame.pts - frame.dts;
sample.duration = frame.duration;
sample.size = 4 * frame.length; // Space for nal unit size
sample.size += frame.byteLength;
if (frame.keyFrame) {
sample.flags.dependsOn = 2;
sample.flags.isNonSyncSample = 0;
}
return sample;
}; // generate the track's sample table from an array of gops
var generateSampleTable = function generateSampleTable(gops, baseDataOffset) {
var h,
i,
sample,
currentGop,
currentFrame,
dataOffset = baseDataOffset || 0,
samples = [];
for (h = 0; h < gops.length; h++) {
currentGop = gops[h];
for (i = 0; i < currentGop.length; i++) {
currentFrame = currentGop[i];
sample = sampleForFrame(currentFrame, dataOffset);
dataOffset += sample.size;
samples.push(sample);
}
}
return samples;
}; // generate the track's raw mdat data from an array of gops
var concatenateNalData = function concatenateNalData(gops) {
var h,
i,
j,
currentGop,
currentFrame,
currentNal,
dataOffset = 0,
nalsByteLength = gops.byteLength,
numberOfNals = gops.nalCount,
totalByteLength = nalsByteLength + 4 * numberOfNals,
data = new Uint8Array(totalByteLength),
view = new DataView(data.buffer); // For each Gop..
for (h = 0; h < gops.length; h++) {
currentGop = gops[h]; // For each Frame..
for (i = 0; i < currentGop.length; i++) {
currentFrame = currentGop[i]; // For each NAL..
for (j = 0; j < currentFrame.length; j++) {
currentNal = currentFrame[j];
view.setUint32(dataOffset, currentNal.data.byteLength);
dataOffset += 4;
data.set(currentNal.data, dataOffset);
dataOffset += currentNal.data.byteLength;
}
}
}
return data;
}; // generate the track's sample table from a frame
var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {
var sample,
dataOffset = baseDataOffset || 0,
samples = [];
sample = sampleForFrame(frame, dataOffset);
samples.push(sample);
return samples;
}; // generate the track's raw mdat data from a frame
var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {
var i,
currentNal,
dataOffset = 0,
nalsByteLength = frame.byteLength,
numberOfNals = frame.length,
totalByteLength = nalsByteLength + 4 * numberOfNals,
data = new Uint8Array(totalByteLength),
view = new DataView(data.buffer); // For each NAL..
for (i = 0; i < frame.length; i++) {
currentNal = frame[i];
view.setUint32(dataOffset, currentNal.data.byteLength);
dataOffset += 4;
data.set(currentNal.data, dataOffset);
dataOffset += currentNal.data.byteLength;
}
return data;
};
module.exports = {
groupNalsIntoFrames: groupNalsIntoFrames,
groupFramesIntoGops: groupFramesIntoGops,
extendFirstKeyFrame: extendFirstKeyFrame,
generateSampleTable: generateSampleTable,
concatenateNalData: concatenateNalData,
generateSampleTableForFrame: generateSampleTableForFrame,
concatenateNalDataForFrame: concatenateNalDataForFrame
};

30
node_modules/mux.js/cjs/mp4/index.js generated vendored
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@ -1,16 +1,16 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = {
generator: require('./mp4-generator'),
probe: require('./probe'),
Transmuxer: require('./transmuxer').Transmuxer,
AudioSegmentStream: require('./transmuxer').AudioSegmentStream,
VideoSegmentStream: require('./transmuxer').VideoSegmentStream,
CaptionParser: require('./caption-parser')
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = {
generator: require('./mp4-generator'),
probe: require('./probe'),
Transmuxer: require('./transmuxer').Transmuxer,
AudioSegmentStream: require('./transmuxer').AudioSegmentStream,
VideoSegmentStream: require('./transmuxer').VideoSegmentStream,
CaptionParser: require('./caption-parser')
};

1219
node_modules/mux.js/cjs/mp4/mp4-generator.js generated vendored
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22
node_modules/mux.js/cjs/mp4/parse-type.js generated vendored
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@ -1,12 +1,12 @@
"use strict";
var parseType = function parseType(buffer) {
var result = '';
result += String.fromCharCode(buffer[0]);
result += String.fromCharCode(buffer[1]);
result += String.fromCharCode(buffer[2]);
result += String.fromCharCode(buffer[3]);
return result;
};
"use strict";
var parseType = function parseType(buffer) {
var result = '';
result += String.fromCharCode(buffer[0]);
result += String.fromCharCode(buffer[1]);
result += String.fromCharCode(buffer[2]);
result += String.fromCharCode(buffer[3]);
return result;
};
module.exports = parseType;

693
node_modules/mux.js/cjs/mp4/probe.js generated vendored
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@ -1,335 +1,360 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Utilities to detect basic properties and metadata about MP4s.
*/
'use strict';
var toUnsigned = require('../utils/bin').toUnsigned;
var toHexString = require('../utils/bin').toHexString;
var findBox = require('../mp4/find-box.js');
var parseType = require('../mp4/parse-type.js');
var parseTfhd = require('../tools/parse-tfhd.js');
var parseTrun = require('../tools/parse-trun.js');
var parseTfdt = require('../tools/parse-tfdt.js');
var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader;
/**
* Parses an MP4 initialization segment and extracts the timescale
* values for any declared tracks. Timescale values indicate the
* number of clock ticks per second to assume for time-based values
* elsewhere in the MP4.
*
* To determine the start time of an MP4, you need two pieces of
* information: the timescale unit and the earliest base media decode
* time. Multiple timescales can be specified within an MP4 but the
* base media decode time is always expressed in the timescale from
* the media header box for the track:
* ```
* moov > trak > mdia > mdhd.timescale
* ```
* @param init {Uint8Array} the bytes of the init segment
* @return {object} a hash of track ids to timescale values or null if
* the init segment is malformed.
*/
timescale = function timescale(init) {
var result = {},
traks = findBox(init, ['moov', 'trak']); // mdhd timescale
return traks.reduce(function (result, trak) {
var tkhd, version, index, id, mdhd;
tkhd = findBox(trak, ['tkhd'])[0];
if (!tkhd) {
return null;
}
version = tkhd[0];
index = version === 0 ? 12 : 20;
id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);
mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
if (!mdhd) {
return null;
}
version = mdhd[0];
index = version === 0 ? 12 : 20;
result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
return result;
}, result);
};
/**
* Determine the base media decode start time, in seconds, for an MP4
* fragment. If multiple fragments are specified, the earliest time is
* returned.
*
* The base media decode time can be parsed from track fragment
* metadata:
* ```
* moof > traf > tfdt.baseMediaDecodeTime
* ```
* It requires the timescale value from the mdhd to interpret.
*
* @param timescale {object} a hash of track ids to timescale values.
* @return {number} the earliest base media decode start time for the
* fragment, in seconds
*/
startTime = function startTime(timescale, fragment) {
var trafs, baseTimes, result; // we need info from two childrend of each track fragment box
trafs = findBox(fragment, ['moof', 'traf']); // determine the start times for each track
baseTimes = [].concat.apply([], trafs.map(function (traf) {
return findBox(traf, ['tfhd']).map(function (tfhd) {
var id, scale, baseTime; // get the track id from the tfhd
id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified
scale = timescale[id] || 90e3; // get the base media decode time from the tfdt
baseTime = findBox(traf, ['tfdt']).map(function (tfdt) {
var version, result;
version = tfdt[0];
result = toUnsigned(tfdt[4] << 24 | tfdt[5] << 16 | tfdt[6] << 8 | tfdt[7]);
if (version === 1) {
result *= Math.pow(2, 32);
result += toUnsigned(tfdt[8] << 24 | tfdt[9] << 16 | tfdt[10] << 8 | tfdt[11]);
}
return result;
})[0];
baseTime = typeof baseTime === 'number' && !isNaN(baseTime) ? baseTime : Infinity; // convert base time to seconds
return baseTime / scale;
});
})); // return the minimum
result = Math.min.apply(null, baseTimes);
return isFinite(result) ? result : 0;
};
/**
* Determine the composition start, in seconds, for an MP4
* fragment.
*
* The composition start time of a fragment can be calculated using the base
* media decode time, composition time offset, and timescale, as follows:
*
* compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale
*
* All of the aforementioned information is contained within a media fragment's
* `traf` box, except for timescale info, which comes from the initialization
* segment, so a track id (also contained within a `traf`) is also necessary to
* associate it with a timescale
*
*
* @param timescales {object} - a hash of track ids to timescale values.
* @param fragment {Unit8Array} - the bytes of a media segment
* @return {number} the composition start time for the fragment, in seconds
**/
compositionStartTime = function compositionStartTime(timescales, fragment) {
var trafBoxes = findBox(fragment, ['moof', 'traf']);
var baseMediaDecodeTime = 0;
var compositionTimeOffset = 0;
var trackId;
if (trafBoxes && trafBoxes.length) {
// The spec states that track run samples contained within a `traf` box are contiguous, but
// it does not explicitly state whether the `traf` boxes themselves are contiguous.
// We will assume that they are, so we only need the first to calculate start time.
var tfhd = findBox(trafBoxes[0], ['tfhd'])[0];
var trun = findBox(trafBoxes[0], ['trun'])[0];
var tfdt = findBox(trafBoxes[0], ['tfdt'])[0];
if (tfhd) {
var parsedTfhd = parseTfhd(tfhd);
trackId = parsedTfhd.trackId;
}
if (tfdt) {
var parsedTfdt = parseTfdt(tfdt);
baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;
}
if (trun) {
var parsedTrun = parseTrun(trun);
if (parsedTrun.samples && parsedTrun.samples.length) {
compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;
}
}
} // Get timescale for this specific track. Assume a 90kHz clock if no timescale was
// specified.
var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds
return (baseMediaDecodeTime + compositionTimeOffset) / timescale;
};
/**
* Find the trackIds of the video tracks in this source.
* Found by parsing the Handler Reference and Track Header Boxes:
* moov > trak > mdia > hdlr
* moov > trak > tkhd
*
* @param {Uint8Array} init - The bytes of the init segment for this source
* @return {Number[]} A list of trackIds
*
* @see ISO-BMFF-12/2015, Section 8.4.3
**/
getVideoTrackIds = function getVideoTrackIds(init) {
var traks = findBox(init, ['moov', 'trak']);
var videoTrackIds = [];
traks.forEach(function (trak) {
var hdlrs = findBox(trak, ['mdia', 'hdlr']);
var tkhds = findBox(trak, ['tkhd']);
hdlrs.forEach(function (hdlr, index) {
var handlerType = parseType(hdlr.subarray(8, 12));
var tkhd = tkhds[index];
var view;
var version;
var trackId;
if (handlerType === 'vide') {
view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);
version = view.getUint8(0);
trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);
videoTrackIds.push(trackId);
}
});
});
return videoTrackIds;
};
getTimescaleFromMediaHeader = function getTimescaleFromMediaHeader(mdhd) {
// mdhd is a FullBox, meaning it will have its own version as the first byte
var version = mdhd[0];
var index = version === 0 ? 12 : 20;
return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
};
/**
* Get all the video, audio, and hint tracks from a non fragmented
* mp4 segment
*/
getTracks = function getTracks(init) {
var traks = findBox(init, ['moov', 'trak']);
var tracks = [];
traks.forEach(function (trak) {
var track = {};
var tkhd = findBox(trak, ['tkhd'])[0];
var view, tkhdVersion; // id
if (tkhd) {
view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);
tkhdVersion = view.getUint8(0);
track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);
}
var hdlr = findBox(trak, ['mdia', 'hdlr'])[0]; // type
if (hdlr) {
var type = parseType(hdlr.subarray(8, 12));
if (type === 'vide') {
track.type = 'video';
} else if (type === 'soun') {
track.type = 'audio';
} else {
track.type = type;
}
} // codec
var stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];
if (stsd) {
var sampleDescriptions = stsd.subarray(8); // gives the codec type string
track.codec = parseType(sampleDescriptions.subarray(4, 8));
var codecBox = findBox(sampleDescriptions, [track.codec])[0];
var codecConfig, codecConfigType;
if (codecBox) {
// https://tools.ietf.org/html/rfc6381#section-3.3
if (/^[a-z]vc[1-9]$/i.test(track.codec)) {
// we don't need anything but the "config" parameter of the
// avc1 codecBox
codecConfig = codecBox.subarray(78);
codecConfigType = parseType(codecConfig.subarray(4, 8));
if (codecConfigType === 'avcC' && codecConfig.length > 11) {
track.codec += '.'; // left padded with zeroes for single digit hex
// profile idc
track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags
track.codec += toHexString(codecConfig[10]); // level idc
track.codec += toHexString(codecConfig[11]);
} else {
// TODO: show a warning that we couldn't parse the codec
// and are using the default
track.codec = 'avc1.4d400d';
}
} else if (/^mp4[a,v]$/i.test(track.codec)) {
// we do not need anything but the streamDescriptor of the mp4a codecBox
codecConfig = codecBox.subarray(28);
codecConfigType = parseType(codecConfig.subarray(4, 8));
if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {
track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit
track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');
} else {
// TODO: show a warning that we couldn't parse the codec
// and are using the default
track.codec = 'mp4a.40.2';
}
} else {
// flac, opus, etc
track.codec = track.codec.toLowerCase();
}
}
}
var mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
if (mdhd) {
track.timescale = getTimescaleFromMediaHeader(mdhd);
}
tracks.push(track);
});
return tracks;
};
module.exports = {
// export mp4 inspector's findBox and parseType for backwards compatibility
findBox: findBox,
parseType: parseType,
timescale: timescale,
startTime: startTime,
compositionStartTime: compositionStartTime,
videoTrackIds: getVideoTrackIds,
tracks: getTracks,
getTimescaleFromMediaHeader: getTimescaleFromMediaHeader
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Utilities to detect basic properties and metadata about MP4s.
*/
'use strict';
var toUnsigned = require('../utils/bin').toUnsigned;
var toHexString = require('../utils/bin').toHexString;
var findBox = require('../mp4/find-box.js');
var parseType = require('../mp4/parse-type.js');
var parseTfhd = require('../tools/parse-tfhd.js');
var parseTrun = require('../tools/parse-trun.js');
var parseTfdt = require('../tools/parse-tfdt.js');
var getUint64 = require('../utils/numbers.js').getUint64;
var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader;
var window = require('global/window');
/**
* Parses an MP4 initialization segment and extracts the timescale
* values for any declared tracks. Timescale values indicate the
* number of clock ticks per second to assume for time-based values
* elsewhere in the MP4.
*
* To determine the start time of an MP4, you need two pieces of
* information: the timescale unit and the earliest base media decode
* time. Multiple timescales can be specified within an MP4 but the
* base media decode time is always expressed in the timescale from
* the media header box for the track:
* ```
* moov > trak > mdia > mdhd.timescale
* ```
* @param init {Uint8Array} the bytes of the init segment
* @return {object} a hash of track ids to timescale values or null if
* the init segment is malformed.
*/
timescale = function timescale(init) {
var result = {},
traks = findBox(init, ['moov', 'trak']); // mdhd timescale
return traks.reduce(function (result, trak) {
var tkhd, version, index, id, mdhd;
tkhd = findBox(trak, ['tkhd'])[0];
if (!tkhd) {
return null;
}
version = tkhd[0];
index = version === 0 ? 12 : 20;
id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);
mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
if (!mdhd) {
return null;
}
version = mdhd[0];
index = version === 0 ? 12 : 20;
result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
return result;
}, result);
};
/**
* Determine the base media decode start time, in seconds, for an MP4
* fragment. If multiple fragments are specified, the earliest time is
* returned.
*
* The base media decode time can be parsed from track fragment
* metadata:
* ```
* moof > traf > tfdt.baseMediaDecodeTime
* ```
* It requires the timescale value from the mdhd to interpret.
*
* @param timescale {object} a hash of track ids to timescale values.
* @return {number} the earliest base media decode start time for the
* fragment, in seconds
*/
startTime = function startTime(timescale, fragment) {
var trafs, result; // we need info from two childrend of each track fragment box
trafs = findBox(fragment, ['moof', 'traf']); // determine the start times for each track
var lowestTime = trafs.reduce(function (acc, traf) {
var tfhd = findBox(traf, ['tfhd'])[0]; // get the track id from the tfhd
var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified
var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt
var tfdt = findBox(traf, ['tfdt'])[0];
var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);
var baseTime; // version 1 is 64 bit
if (tfdt[0] === 1) {
baseTime = getUint64(tfdt.subarray(4, 12));
} else {
baseTime = dv.getUint32(4);
} // convert base time to seconds if it is a valid number.
var seconds;
if (typeof baseTime === 'bigint') {
seconds = baseTime / window.BigInt(scale);
} else if (typeof baseTime === 'number' && !isNaN(baseTime)) {
seconds = baseTime / scale;
}
if (seconds < Number.MAX_SAFE_INTEGER) {
seconds = Number(seconds);
}
if (seconds < acc) {
acc = seconds;
}
return acc;
}, Infinity);
return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;
};
/**
* Determine the composition start, in seconds, for an MP4
* fragment.
*
* The composition start time of a fragment can be calculated using the base
* media decode time, composition time offset, and timescale, as follows:
*
* compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale
*
* All of the aforementioned information is contained within a media fragment's
* `traf` box, except for timescale info, which comes from the initialization
* segment, so a track id (also contained within a `traf`) is also necessary to
* associate it with a timescale
*
*
* @param timescales {object} - a hash of track ids to timescale values.
* @param fragment {Unit8Array} - the bytes of a media segment
* @return {number} the composition start time for the fragment, in seconds
**/
compositionStartTime = function compositionStartTime(timescales, fragment) {
var trafBoxes = findBox(fragment, ['moof', 'traf']);
var baseMediaDecodeTime = 0;
var compositionTimeOffset = 0;
var trackId;
if (trafBoxes && trafBoxes.length) {
// The spec states that track run samples contained within a `traf` box are contiguous, but
// it does not explicitly state whether the `traf` boxes themselves are contiguous.
// We will assume that they are, so we only need the first to calculate start time.
var tfhd = findBox(trafBoxes[0], ['tfhd'])[0];
var trun = findBox(trafBoxes[0], ['trun'])[0];
var tfdt = findBox(trafBoxes[0], ['tfdt'])[0];
if (tfhd) {
var parsedTfhd = parseTfhd(tfhd);
trackId = parsedTfhd.trackId;
}
if (tfdt) {
var parsedTfdt = parseTfdt(tfdt);
baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;
}
if (trun) {
var parsedTrun = parseTrun(trun);
if (parsedTrun.samples && parsedTrun.samples.length) {
compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;
}
}
} // Get timescale for this specific track. Assume a 90kHz clock if no timescale was
// specified.
var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds
if (typeof baseMediaDecodeTime === 'bigint') {
compositionTimeOffset = window.BigInt(compositionTimeOffset);
timescale = window.BigInt(timescale);
}
var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;
if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {
result = Number(result);
}
return result;
};
/**
* Find the trackIds of the video tracks in this source.
* Found by parsing the Handler Reference and Track Header Boxes:
* moov > trak > mdia > hdlr
* moov > trak > tkhd
*
* @param {Uint8Array} init - The bytes of the init segment for this source
* @return {Number[]} A list of trackIds
*
* @see ISO-BMFF-12/2015, Section 8.4.3
**/
getVideoTrackIds = function getVideoTrackIds(init) {
var traks = findBox(init, ['moov', 'trak']);
var videoTrackIds = [];
traks.forEach(function (trak) {
var hdlrs = findBox(trak, ['mdia', 'hdlr']);
var tkhds = findBox(trak, ['tkhd']);
hdlrs.forEach(function (hdlr, index) {
var handlerType = parseType(hdlr.subarray(8, 12));
var tkhd = tkhds[index];
var view;
var version;
var trackId;
if (handlerType === 'vide') {
view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);
version = view.getUint8(0);
trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);
videoTrackIds.push(trackId);
}
});
});
return videoTrackIds;
};
getTimescaleFromMediaHeader = function getTimescaleFromMediaHeader(mdhd) {
// mdhd is a FullBox, meaning it will have its own version as the first byte
var version = mdhd[0];
var index = version === 0 ? 12 : 20;
return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
};
/**
* Get all the video, audio, and hint tracks from a non fragmented
* mp4 segment
*/
getTracks = function getTracks(init) {
var traks = findBox(init, ['moov', 'trak']);
var tracks = [];
traks.forEach(function (trak) {
var track = {};
var tkhd = findBox(trak, ['tkhd'])[0];
var view, tkhdVersion; // id
if (tkhd) {
view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);
tkhdVersion = view.getUint8(0);
track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);
}
var hdlr = findBox(trak, ['mdia', 'hdlr'])[0]; // type
if (hdlr) {
var type = parseType(hdlr.subarray(8, 12));
if (type === 'vide') {
track.type = 'video';
} else if (type === 'soun') {
track.type = 'audio';
} else {
track.type = type;
}
} // codec
var stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];
if (stsd) {
var sampleDescriptions = stsd.subarray(8); // gives the codec type string
track.codec = parseType(sampleDescriptions.subarray(4, 8));
var codecBox = findBox(sampleDescriptions, [track.codec])[0];
var codecConfig, codecConfigType;
if (codecBox) {
// https://tools.ietf.org/html/rfc6381#section-3.3
if (/^[asm]vc[1-9]$/i.test(track.codec)) {
// we don't need anything but the "config" parameter of the
// avc1 codecBox
codecConfig = codecBox.subarray(78);
codecConfigType = parseType(codecConfig.subarray(4, 8));
if (codecConfigType === 'avcC' && codecConfig.length > 11) {
track.codec += '.'; // left padded with zeroes for single digit hex
// profile idc
track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags
track.codec += toHexString(codecConfig[10]); // level idc
track.codec += toHexString(codecConfig[11]);
} else {
// TODO: show a warning that we couldn't parse the codec
// and are using the default
track.codec = 'avc1.4d400d';
}
} else if (/^mp4[a,v]$/i.test(track.codec)) {
// we do not need anything but the streamDescriptor of the mp4a codecBox
codecConfig = codecBox.subarray(28);
codecConfigType = parseType(codecConfig.subarray(4, 8));
if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {
track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit
track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');
} else {
// TODO: show a warning that we couldn't parse the codec
// and are using the default
track.codec = 'mp4a.40.2';
}
} else {
// flac, opus, etc
track.codec = track.codec.toLowerCase();
}
}
}
var mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
if (mdhd) {
track.timescale = getTimescaleFromMediaHeader(mdhd);
}
tracks.push(track);
});
return tracks;
};
module.exports = {
// export mp4 inspector's findBox and parseType for backwards compatibility
findBox: findBox,
parseType: parseType,
timescale: timescale,
startTime: startTime,
compositionStartTime: compositionStartTime,
videoTrackIds: getVideoTrackIds,
tracks: getTracks,
getTimescaleFromMediaHeader: getTimescaleFromMediaHeader
};

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node_modules/mux.js/cjs/mp4/track-decode-info.js generated vendored
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@ -1,108 +1,108 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
/**
* Store information about the start and end of the track and the
* duration for each frame/sample we process in order to calculate
* the baseMediaDecodeTime
*/
var collectDtsInfo = function collectDtsInfo(track, data) {
if (typeof data.pts === 'number') {
if (track.timelineStartInfo.pts === undefined) {
track.timelineStartInfo.pts = data.pts;
}
if (track.minSegmentPts === undefined) {
track.minSegmentPts = data.pts;
} else {
track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);
}
if (track.maxSegmentPts === undefined) {
track.maxSegmentPts = data.pts;
} else {
track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);
}
}
if (typeof data.dts === 'number') {
if (track.timelineStartInfo.dts === undefined) {
track.timelineStartInfo.dts = data.dts;
}
if (track.minSegmentDts === undefined) {
track.minSegmentDts = data.dts;
} else {
track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);
}
if (track.maxSegmentDts === undefined) {
track.maxSegmentDts = data.dts;
} else {
track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);
}
}
};
/**
* Clear values used to calculate the baseMediaDecodeTime between
* tracks
*/
var clearDtsInfo = function clearDtsInfo(track) {
delete track.minSegmentDts;
delete track.maxSegmentDts;
delete track.minSegmentPts;
delete track.maxSegmentPts;
};
/**
* Calculate the track's baseMediaDecodeTime based on the earliest
* DTS the transmuxer has ever seen and the minimum DTS for the
* current track
* @param track {object} track metadata configuration
* @param keepOriginalTimestamps {boolean} If true, keep the timestamps
* in the source; false to adjust the first segment to start at 0.
*/
var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {
var baseMediaDecodeTime,
scale,
minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.
if (!keepOriginalTimestamps) {
minSegmentDts -= track.timelineStartInfo.dts;
} // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where
// we want the start of the first segment to be placed
baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first
baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative
baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);
if (track.type === 'audio') {
// Audio has a different clock equal to the sampling_rate so we need to
// scale the PTS values into the clock rate of the track
scale = track.samplerate / ONE_SECOND_IN_TS;
baseMediaDecodeTime *= scale;
baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);
}
return baseMediaDecodeTime;
};
module.exports = {
clearDtsInfo: clearDtsInfo,
calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,
collectDtsInfo: collectDtsInfo
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
/**
* Store information about the start and end of the track and the
* duration for each frame/sample we process in order to calculate
* the baseMediaDecodeTime
*/
var collectDtsInfo = function collectDtsInfo(track, data) {
if (typeof data.pts === 'number') {
if (track.timelineStartInfo.pts === undefined) {
track.timelineStartInfo.pts = data.pts;
}
if (track.minSegmentPts === undefined) {
track.minSegmentPts = data.pts;
} else {
track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);
}
if (track.maxSegmentPts === undefined) {
track.maxSegmentPts = data.pts;
} else {
track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);
}
}
if (typeof data.dts === 'number') {
if (track.timelineStartInfo.dts === undefined) {
track.timelineStartInfo.dts = data.dts;
}
if (track.minSegmentDts === undefined) {
track.minSegmentDts = data.dts;
} else {
track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);
}
if (track.maxSegmentDts === undefined) {
track.maxSegmentDts = data.dts;
} else {
track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);
}
}
};
/**
* Clear values used to calculate the baseMediaDecodeTime between
* tracks
*/
var clearDtsInfo = function clearDtsInfo(track) {
delete track.minSegmentDts;
delete track.maxSegmentDts;
delete track.minSegmentPts;
delete track.maxSegmentPts;
};
/**
* Calculate the track's baseMediaDecodeTime based on the earliest
* DTS the transmuxer has ever seen and the minimum DTS for the
* current track
* @param track {object} track metadata configuration
* @param keepOriginalTimestamps {boolean} If true, keep the timestamps
* in the source; false to adjust the first segment to start at 0.
*/
var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {
var baseMediaDecodeTime,
scale,
minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.
if (!keepOriginalTimestamps) {
minSegmentDts -= track.timelineStartInfo.dts;
} // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where
// we want the start of the first segment to be placed
baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first
baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative
baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);
if (track.type === 'audio') {
// Audio has a different clock equal to the sampling_rate so we need to
// scale the PTS values into the clock rate of the track
scale = track.samplerate / ONE_SECOND_IN_TS;
baseMediaDecodeTime *= scale;
baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);
}
return baseMediaDecodeTime;
};
module.exports = {
clearDtsInfo: clearDtsInfo,
calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,
collectDtsInfo: collectDtsInfo
};

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node_modules/mux.js/cjs/mp4/transmuxer.js generated vendored
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280
node_modules/mux.js/cjs/partial/audio-segment-stream.js generated vendored
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@ -1,141 +1,141 @@
'use strict';
var Stream = require('../utils/stream.js');
var mp4 = require('../mp4/mp4-generator.js');
var audioFrameUtils = require('../mp4/audio-frame-utils');
var trackInfo = require('../mp4/track-decode-info.js');
var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
var AUDIO_PROPERTIES = require('../constants/audio-properties.js');
/**
* Constructs a single-track, ISO BMFF media segment from AAC data
* events. The output of this stream can be fed to a SourceBuffer
* configured with a suitable initialization segment.
*/
var AudioSegmentStream = function AudioSegmentStream(track, options) {
var adtsFrames = [],
sequenceNumber = 0,
earliestAllowedDts = 0,
audioAppendStartTs = 0,
videoBaseMediaDecodeTime = Infinity,
segmentStartPts = null,
segmentEndPts = null;
options = options || {};
AudioSegmentStream.prototype.init.call(this);
this.push = function (data) {
trackInfo.collectDtsInfo(track, data);
if (track) {
AUDIO_PROPERTIES.forEach(function (prop) {
track[prop] = data[prop];
});
} // buffer audio data until end() is called
adtsFrames.push(data);
};
this.setEarliestDts = function (earliestDts) {
earliestAllowedDts = earliestDts;
};
this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {
videoBaseMediaDecodeTime = baseMediaDecodeTime;
};
this.setAudioAppendStart = function (timestamp) {
audioAppendStartTs = timestamp;
};
this.processFrames_ = function () {
var frames, moof, mdat, boxes, timingInfo; // return early if no audio data has been observed
if (adtsFrames.length === 0) {
return;
}
frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);
if (frames.length === 0) {
// return early if the frames are all after the earliest allowed DTS
// TODO should we clear the adtsFrames?
return;
}
track.baseMediaDecodeTime = trackInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to
// samples (that is, adts frames) in the audio data
track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat
mdat = mp4.mdat(audioFrameUtils.concatenateFrameData(frames));
adtsFrames = [];
moof = mp4.moof(sequenceNumber, [track]); // bump the sequence number for next time
sequenceNumber++;
track.initSegment = mp4.initSegment([track]); // it would be great to allocate this array up front instead of
// throwing away hundreds of media segment fragments
boxes = new Uint8Array(moof.byteLength + mdat.byteLength);
boxes.set(moof);
boxes.set(mdat, moof.byteLength);
trackInfo.clearDtsInfo(track);
if (segmentStartPts === null) {
segmentEndPts = segmentStartPts = frames[0].pts;
}
segmentEndPts += frames.length * (ONE_SECOND_IN_TS * 1024 / track.samplerate);
timingInfo = {
start: segmentStartPts
};
this.trigger('timingInfo', timingInfo);
this.trigger('data', {
track: track,
boxes: boxes
});
};
this.flush = function () {
this.processFrames_(); // trigger final timing info
this.trigger('timingInfo', {
start: segmentStartPts,
end: segmentEndPts
});
this.resetTiming_();
this.trigger('done', 'AudioSegmentStream');
};
this.partialFlush = function () {
this.processFrames_();
this.trigger('partialdone', 'AudioSegmentStream');
};
this.endTimeline = function () {
this.flush();
this.trigger('endedtimeline', 'AudioSegmentStream');
};
this.resetTiming_ = function () {
trackInfo.clearDtsInfo(track);
segmentStartPts = null;
segmentEndPts = null;
};
this.reset = function () {
this.resetTiming_();
adtsFrames = [];
this.trigger('reset');
};
};
AudioSegmentStream.prototype = new Stream();
'use strict';
var Stream = require('../utils/stream.js');
var mp4 = require('../mp4/mp4-generator.js');
var audioFrameUtils = require('../mp4/audio-frame-utils');
var trackInfo = require('../mp4/track-decode-info.js');
var ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;
var AUDIO_PROPERTIES = require('../constants/audio-properties.js');
/**
* Constructs a single-track, ISO BMFF media segment from AAC data
* events. The output of this stream can be fed to a SourceBuffer
* configured with a suitable initialization segment.
*/
var AudioSegmentStream = function AudioSegmentStream(track, options) {
var adtsFrames = [],
sequenceNumber = 0,
earliestAllowedDts = 0,
audioAppendStartTs = 0,
videoBaseMediaDecodeTime = Infinity,
segmentStartPts = null,
segmentEndPts = null;
options = options || {};
AudioSegmentStream.prototype.init.call(this);
this.push = function (data) {
trackInfo.collectDtsInfo(track, data);
if (track) {
AUDIO_PROPERTIES.forEach(function (prop) {
track[prop] = data[prop];
});
} // buffer audio data until end() is called
adtsFrames.push(data);
};
this.setEarliestDts = function (earliestDts) {
earliestAllowedDts = earliestDts;
};
this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {
videoBaseMediaDecodeTime = baseMediaDecodeTime;
};
this.setAudioAppendStart = function (timestamp) {
audioAppendStartTs = timestamp;
};
this.processFrames_ = function () {
var frames, moof, mdat, boxes, timingInfo; // return early if no audio data has been observed
if (adtsFrames.length === 0) {
return;
}
frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);
if (frames.length === 0) {
// return early if the frames are all after the earliest allowed DTS
// TODO should we clear the adtsFrames?
return;
}
track.baseMediaDecodeTime = trackInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to
// samples (that is, adts frames) in the audio data
track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat
mdat = mp4.mdat(audioFrameUtils.concatenateFrameData(frames));
adtsFrames = [];
moof = mp4.moof(sequenceNumber, [track]); // bump the sequence number for next time
sequenceNumber++;
track.initSegment = mp4.initSegment([track]); // it would be great to allocate this array up front instead of
// throwing away hundreds of media segment fragments
boxes = new Uint8Array(moof.byteLength + mdat.byteLength);
boxes.set(moof);
boxes.set(mdat, moof.byteLength);
trackInfo.clearDtsInfo(track);
if (segmentStartPts === null) {
segmentEndPts = segmentStartPts = frames[0].pts;
}
segmentEndPts += frames.length * (ONE_SECOND_IN_TS * 1024 / track.samplerate);
timingInfo = {
start: segmentStartPts
};
this.trigger('timingInfo', timingInfo);
this.trigger('data', {
track: track,
boxes: boxes
});
};
this.flush = function () {
this.processFrames_(); // trigger final timing info
this.trigger('timingInfo', {
start: segmentStartPts,
end: segmentEndPts
});
this.resetTiming_();
this.trigger('done', 'AudioSegmentStream');
};
this.partialFlush = function () {
this.processFrames_();
this.trigger('partialdone', 'AudioSegmentStream');
};
this.endTimeline = function () {
this.flush();
this.trigger('endedtimeline', 'AudioSegmentStream');
};
this.resetTiming_ = function () {
trackInfo.clearDtsInfo(track);
segmentStartPts = null;
segmentEndPts = null;
};
this.reset = function () {
this.resetTiming_();
adtsFrames = [];
this.trigger('reset');
};
};
AudioSegmentStream.prototype = new Stream();
module.exports = AudioSegmentStream;

8
node_modules/mux.js/cjs/partial/index.js generated vendored
View file

@ -1,5 +1,5 @@
"use strict";
module.exports = {
Transmuxer: require('./transmuxer')
"use strict";
module.exports = {
Transmuxer: require('./transmuxer')
};

646
node_modules/mux.js/cjs/partial/transmuxer.js generated vendored
View file

@ -1,324 +1,324 @@
"use strict";
var Stream = require('../utils/stream.js');
var m2ts = require('../m2ts/m2ts.js');
var codecs = require('../codecs/index.js');
var AudioSegmentStream = require('./audio-segment-stream.js');
var VideoSegmentStream = require('./video-segment-stream.js');
var trackInfo = require('../mp4/track-decode-info.js');
var isLikelyAacData = require('../aac/utils').isLikelyAacData;
var AdtsStream = require('../codecs/adts');
var AacStream = require('../aac/index');
var clock = require('../utils/clock');
var createPipeline = function createPipeline(object) {
object.prototype = new Stream();
object.prototype.init.call(object);
return object;
};
var tsPipeline = function tsPipeline(options) {
var pipeline = {
type: 'ts',
tracks: {
audio: null,
video: null
},
packet: new m2ts.TransportPacketStream(),
parse: new m2ts.TransportParseStream(),
elementary: new m2ts.ElementaryStream(),
timestampRollover: new m2ts.TimestampRolloverStream(),
adts: new codecs.Adts(),
h264: new codecs.h264.H264Stream(),
captionStream: new m2ts.CaptionStream(options),
metadataStream: new m2ts.MetadataStream()
};
pipeline.headOfPipeline = pipeline.packet; // Transport Stream
pipeline.packet.pipe(pipeline.parse).pipe(pipeline.elementary).pipe(pipeline.timestampRollover); // H264
pipeline.timestampRollover.pipe(pipeline.h264); // Hook up CEA-608/708 caption stream
pipeline.h264.pipe(pipeline.captionStream);
pipeline.timestampRollover.pipe(pipeline.metadataStream); // ADTS
pipeline.timestampRollover.pipe(pipeline.adts);
pipeline.elementary.on('data', function (data) {
if (data.type !== 'metadata') {
return;
}
for (var i = 0; i < data.tracks.length; i++) {
if (!pipeline.tracks[data.tracks[i].type]) {
pipeline.tracks[data.tracks[i].type] = data.tracks[i];
pipeline.tracks[data.tracks[i].type].timelineStartInfo.baseMediaDecodeTime = options.baseMediaDecodeTime;
}
}
if (pipeline.tracks.video && !pipeline.videoSegmentStream) {
pipeline.videoSegmentStream = new VideoSegmentStream(pipeline.tracks.video, options);
pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {
if (pipeline.tracks.audio && !options.keepOriginalTimestamps) {
pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - options.baseMediaDecodeTime);
}
});
pipeline.videoSegmentStream.on('timingInfo', pipeline.trigger.bind(pipeline, 'videoTimingInfo'));
pipeline.videoSegmentStream.on('data', function (data) {
pipeline.trigger('data', {
type: 'video',
data: data
});
});
pipeline.videoSegmentStream.on('done', pipeline.trigger.bind(pipeline, 'done'));
pipeline.videoSegmentStream.on('partialdone', pipeline.trigger.bind(pipeline, 'partialdone'));
pipeline.videoSegmentStream.on('endedtimeline', pipeline.trigger.bind(pipeline, 'endedtimeline'));
pipeline.h264.pipe(pipeline.videoSegmentStream);
}
if (pipeline.tracks.audio && !pipeline.audioSegmentStream) {
pipeline.audioSegmentStream = new AudioSegmentStream(pipeline.tracks.audio, options);
pipeline.audioSegmentStream.on('data', function (data) {
pipeline.trigger('data', {
type: 'audio',
data: data
});
});
pipeline.audioSegmentStream.on('done', pipeline.trigger.bind(pipeline, 'done'));
pipeline.audioSegmentStream.on('partialdone', pipeline.trigger.bind(pipeline, 'partialdone'));
pipeline.audioSegmentStream.on('endedtimeline', pipeline.trigger.bind(pipeline, 'endedtimeline'));
pipeline.audioSegmentStream.on('timingInfo', pipeline.trigger.bind(pipeline, 'audioTimingInfo'));
pipeline.adts.pipe(pipeline.audioSegmentStream);
} // emit pmt info
pipeline.trigger('trackinfo', {
hasAudio: !!pipeline.tracks.audio,
hasVideo: !!pipeline.tracks.video
});
});
pipeline.captionStream.on('data', function (caption) {
var timelineStartPts;
if (pipeline.tracks.video) {
timelineStartPts = pipeline.tracks.video.timelineStartInfo.pts || 0;
} else {
// This will only happen if we encounter caption packets before
// video data in a segment. This is an unusual/unlikely scenario,
// so we assume the timeline starts at zero for now.
timelineStartPts = 0;
} // Translate caption PTS times into second offsets into the
// video timeline for the segment
caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, options.keepOriginalTimestamps);
caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, options.keepOriginalTimestamps);
pipeline.trigger('caption', caption);
});
pipeline = createPipeline(pipeline);
pipeline.metadataStream.on('data', pipeline.trigger.bind(pipeline, 'id3Frame'));
return pipeline;
};
var aacPipeline = function aacPipeline(options) {
var pipeline = {
type: 'aac',
tracks: {
audio: null
},
metadataStream: new m2ts.MetadataStream(),
aacStream: new AacStream(),
audioRollover: new m2ts.TimestampRolloverStream('audio'),
timedMetadataRollover: new m2ts.TimestampRolloverStream('timed-metadata'),
adtsStream: new AdtsStream(true)
}; // set up the parsing pipeline
pipeline.headOfPipeline = pipeline.aacStream;
pipeline.aacStream.pipe(pipeline.audioRollover).pipe(pipeline.adtsStream);
pipeline.aacStream.pipe(pipeline.timedMetadataRollover).pipe(pipeline.metadataStream);
pipeline.metadataStream.on('timestamp', function (frame) {
pipeline.aacStream.setTimestamp(frame.timeStamp);
});
pipeline.aacStream.on('data', function (data) {
if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {
return;
}
pipeline.tracks.audio = pipeline.tracks.audio || {
timelineStartInfo: {
baseMediaDecodeTime: options.baseMediaDecodeTime
},
codec: 'adts',
type: 'audio'
}; // hook up the audio segment stream to the first track with aac data
pipeline.audioSegmentStream = new AudioSegmentStream(pipeline.tracks.audio, options);
pipeline.audioSegmentStream.on('data', function (data) {
pipeline.trigger('data', {
type: 'audio',
data: data
});
});
pipeline.audioSegmentStream.on('partialdone', pipeline.trigger.bind(pipeline, 'partialdone'));
pipeline.audioSegmentStream.on('done', pipeline.trigger.bind(pipeline, 'done'));
pipeline.audioSegmentStream.on('endedtimeline', pipeline.trigger.bind(pipeline, 'endedtimeline'));
pipeline.audioSegmentStream.on('timingInfo', pipeline.trigger.bind(pipeline, 'audioTimingInfo')); // Set up the final part of the audio pipeline
pipeline.adtsStream.pipe(pipeline.audioSegmentStream);
pipeline.trigger('trackinfo', {
hasAudio: !!pipeline.tracks.audio,
hasVideo: !!pipeline.tracks.video
});
}); // set the pipeline up as a stream before binding to get access to the trigger function
pipeline = createPipeline(pipeline);
pipeline.metadataStream.on('data', pipeline.trigger.bind(pipeline, 'id3Frame'));
return pipeline;
};
var setupPipelineListeners = function setupPipelineListeners(pipeline, transmuxer) {
pipeline.on('data', transmuxer.trigger.bind(transmuxer, 'data'));
pipeline.on('done', transmuxer.trigger.bind(transmuxer, 'done'));
pipeline.on('partialdone', transmuxer.trigger.bind(transmuxer, 'partialdone'));
pipeline.on('endedtimeline', transmuxer.trigger.bind(transmuxer, 'endedtimeline'));
pipeline.on('audioTimingInfo', transmuxer.trigger.bind(transmuxer, 'audioTimingInfo'));
pipeline.on('videoTimingInfo', transmuxer.trigger.bind(transmuxer, 'videoTimingInfo'));
pipeline.on('trackinfo', transmuxer.trigger.bind(transmuxer, 'trackinfo'));
pipeline.on('id3Frame', function (event) {
// add this to every single emitted segment even though it's only needed for the first
event.dispatchType = pipeline.metadataStream.dispatchType; // keep original time, can be adjusted if needed at a higher level
event.cueTime = clock.videoTsToSeconds(event.pts);
transmuxer.trigger('id3Frame', event);
});
pipeline.on('caption', function (event) {
transmuxer.trigger('caption', event);
});
};
var Transmuxer = function Transmuxer(options) {
var pipeline = null,
hasFlushed = true;
options = options || {};
Transmuxer.prototype.init.call(this);
options.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;
this.push = function (bytes) {
if (hasFlushed) {
var isAac = isLikelyAacData(bytes);
if (isAac && (!pipeline || pipeline.type !== 'aac')) {
pipeline = aacPipeline(options);
setupPipelineListeners(pipeline, this);
} else if (!isAac && (!pipeline || pipeline.type !== 'ts')) {
pipeline = tsPipeline(options);
setupPipelineListeners(pipeline, this);
}
hasFlushed = false;
}
pipeline.headOfPipeline.push(bytes);
};
this.flush = function () {
if (!pipeline) {
return;
}
hasFlushed = true;
pipeline.headOfPipeline.flush();
};
this.partialFlush = function () {
if (!pipeline) {
return;
}
pipeline.headOfPipeline.partialFlush();
};
this.endTimeline = function () {
if (!pipeline) {
return;
}
pipeline.headOfPipeline.endTimeline();
};
this.reset = function () {
if (!pipeline) {
return;
}
pipeline.headOfPipeline.reset();
};
this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {
if (!options.keepOriginalTimestamps) {
options.baseMediaDecodeTime = baseMediaDecodeTime;
}
if (!pipeline) {
return;
}
if (pipeline.tracks.audio) {
pipeline.tracks.audio.timelineStartInfo.dts = undefined;
pipeline.tracks.audio.timelineStartInfo.pts = undefined;
trackInfo.clearDtsInfo(pipeline.tracks.audio);
if (pipeline.audioRollover) {
pipeline.audioRollover.discontinuity();
}
}
if (pipeline.tracks.video) {
if (pipeline.videoSegmentStream) {
pipeline.videoSegmentStream.gopCache_ = [];
}
pipeline.tracks.video.timelineStartInfo.dts = undefined;
pipeline.tracks.video.timelineStartInfo.pts = undefined;
trackInfo.clearDtsInfo(pipeline.tracks.video); // pipeline.captionStream.reset();
}
if (pipeline.timestampRollover) {
pipeline.timestampRollover.discontinuity();
}
};
this.setRemux = function (val) {
options.remux = val;
if (pipeline && pipeline.coalesceStream) {
pipeline.coalesceStream.setRemux(val);
}
};
this.setAudioAppendStart = function (audioAppendStart) {
if (!pipeline || !pipeline.tracks.audio || !pipeline.audioSegmentStream) {
return;
}
pipeline.audioSegmentStream.setAudioAppendStart(audioAppendStart);
}; // TODO GOP alignment support
// Support may be a bit trickier than with full segment appends, as GOPs may be split
// and processed in a more granular fashion
this.alignGopsWith = function (gopsToAlignWith) {
return;
};
};
Transmuxer.prototype = new Stream();
"use strict";
var Stream = require('../utils/stream.js');
var m2ts = require('../m2ts/m2ts.js');
var codecs = require('../codecs/index.js');
var AudioSegmentStream = require('./audio-segment-stream.js');
var VideoSegmentStream = require('./video-segment-stream.js');
var trackInfo = require('../mp4/track-decode-info.js');
var isLikelyAacData = require('../aac/utils').isLikelyAacData;
var AdtsStream = require('../codecs/adts');
var AacStream = require('../aac/index');
var clock = require('../utils/clock');
var createPipeline = function createPipeline(object) {
object.prototype = new Stream();
object.prototype.init.call(object);
return object;
};
var tsPipeline = function tsPipeline(options) {
var pipeline = {
type: 'ts',
tracks: {
audio: null,
video: null
},
packet: new m2ts.TransportPacketStream(),
parse: new m2ts.TransportParseStream(),
elementary: new m2ts.ElementaryStream(),
timestampRollover: new m2ts.TimestampRolloverStream(),
adts: new codecs.Adts(),
h264: new codecs.h264.H264Stream(),
captionStream: new m2ts.CaptionStream(options),
metadataStream: new m2ts.MetadataStream()
};
pipeline.headOfPipeline = pipeline.packet; // Transport Stream
pipeline.packet.pipe(pipeline.parse).pipe(pipeline.elementary).pipe(pipeline.timestampRollover); // H264
pipeline.timestampRollover.pipe(pipeline.h264); // Hook up CEA-608/708 caption stream
pipeline.h264.pipe(pipeline.captionStream);
pipeline.timestampRollover.pipe(pipeline.metadataStream); // ADTS
pipeline.timestampRollover.pipe(pipeline.adts);
pipeline.elementary.on('data', function (data) {
if (data.type !== 'metadata') {
return;
}
for (var i = 0; i < data.tracks.length; i++) {
if (!pipeline.tracks[data.tracks[i].type]) {
pipeline.tracks[data.tracks[i].type] = data.tracks[i];
pipeline.tracks[data.tracks[i].type].timelineStartInfo.baseMediaDecodeTime = options.baseMediaDecodeTime;
}
}
if (pipeline.tracks.video && !pipeline.videoSegmentStream) {
pipeline.videoSegmentStream = new VideoSegmentStream(pipeline.tracks.video, options);
pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {
if (pipeline.tracks.audio && !options.keepOriginalTimestamps) {
pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - options.baseMediaDecodeTime);
}
});
pipeline.videoSegmentStream.on('timingInfo', pipeline.trigger.bind(pipeline, 'videoTimingInfo'));
pipeline.videoSegmentStream.on('data', function (data) {
pipeline.trigger('data', {
type: 'video',
data: data
});
});
pipeline.videoSegmentStream.on('done', pipeline.trigger.bind(pipeline, 'done'));
pipeline.videoSegmentStream.on('partialdone', pipeline.trigger.bind(pipeline, 'partialdone'));
pipeline.videoSegmentStream.on('endedtimeline', pipeline.trigger.bind(pipeline, 'endedtimeline'));
pipeline.h264.pipe(pipeline.videoSegmentStream);
}
if (pipeline.tracks.audio && !pipeline.audioSegmentStream) {
pipeline.audioSegmentStream = new AudioSegmentStream(pipeline.tracks.audio, options);
pipeline.audioSegmentStream.on('data', function (data) {
pipeline.trigger('data', {
type: 'audio',
data: data
});
});
pipeline.audioSegmentStream.on('done', pipeline.trigger.bind(pipeline, 'done'));
pipeline.audioSegmentStream.on('partialdone', pipeline.trigger.bind(pipeline, 'partialdone'));
pipeline.audioSegmentStream.on('endedtimeline', pipeline.trigger.bind(pipeline, 'endedtimeline'));
pipeline.audioSegmentStream.on('timingInfo', pipeline.trigger.bind(pipeline, 'audioTimingInfo'));
pipeline.adts.pipe(pipeline.audioSegmentStream);
} // emit pmt info
pipeline.trigger('trackinfo', {
hasAudio: !!pipeline.tracks.audio,
hasVideo: !!pipeline.tracks.video
});
});
pipeline.captionStream.on('data', function (caption) {
var timelineStartPts;
if (pipeline.tracks.video) {
timelineStartPts = pipeline.tracks.video.timelineStartInfo.pts || 0;
} else {
// This will only happen if we encounter caption packets before
// video data in a segment. This is an unusual/unlikely scenario,
// so we assume the timeline starts at zero for now.
timelineStartPts = 0;
} // Translate caption PTS times into second offsets into the
// video timeline for the segment
caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, options.keepOriginalTimestamps);
caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, options.keepOriginalTimestamps);
pipeline.trigger('caption', caption);
});
pipeline = createPipeline(pipeline);
pipeline.metadataStream.on('data', pipeline.trigger.bind(pipeline, 'id3Frame'));
return pipeline;
};
var aacPipeline = function aacPipeline(options) {
var pipeline = {
type: 'aac',
tracks: {
audio: null
},
metadataStream: new m2ts.MetadataStream(),
aacStream: new AacStream(),
audioRollover: new m2ts.TimestampRolloverStream('audio'),
timedMetadataRollover: new m2ts.TimestampRolloverStream('timed-metadata'),
adtsStream: new AdtsStream(true)
}; // set up the parsing pipeline
pipeline.headOfPipeline = pipeline.aacStream;
pipeline.aacStream.pipe(pipeline.audioRollover).pipe(pipeline.adtsStream);
pipeline.aacStream.pipe(pipeline.timedMetadataRollover).pipe(pipeline.metadataStream);
pipeline.metadataStream.on('timestamp', function (frame) {
pipeline.aacStream.setTimestamp(frame.timeStamp);
});
pipeline.aacStream.on('data', function (data) {
if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {
return;
}
pipeline.tracks.audio = pipeline.tracks.audio || {
timelineStartInfo: {
baseMediaDecodeTime: options.baseMediaDecodeTime
},
codec: 'adts',
type: 'audio'
}; // hook up the audio segment stream to the first track with aac data
pipeline.audioSegmentStream = new AudioSegmentStream(pipeline.tracks.audio, options);
pipeline.audioSegmentStream.on('data', function (data) {
pipeline.trigger('data', {
type: 'audio',
data: data
});
});
pipeline.audioSegmentStream.on('partialdone', pipeline.trigger.bind(pipeline, 'partialdone'));
pipeline.audioSegmentStream.on('done', pipeline.trigger.bind(pipeline, 'done'));
pipeline.audioSegmentStream.on('endedtimeline', pipeline.trigger.bind(pipeline, 'endedtimeline'));
pipeline.audioSegmentStream.on('timingInfo', pipeline.trigger.bind(pipeline, 'audioTimingInfo')); // Set up the final part of the audio pipeline
pipeline.adtsStream.pipe(pipeline.audioSegmentStream);
pipeline.trigger('trackinfo', {
hasAudio: !!pipeline.tracks.audio,
hasVideo: !!pipeline.tracks.video
});
}); // set the pipeline up as a stream before binding to get access to the trigger function
pipeline = createPipeline(pipeline);
pipeline.metadataStream.on('data', pipeline.trigger.bind(pipeline, 'id3Frame'));
return pipeline;
};
var setupPipelineListeners = function setupPipelineListeners(pipeline, transmuxer) {
pipeline.on('data', transmuxer.trigger.bind(transmuxer, 'data'));
pipeline.on('done', transmuxer.trigger.bind(transmuxer, 'done'));
pipeline.on('partialdone', transmuxer.trigger.bind(transmuxer, 'partialdone'));
pipeline.on('endedtimeline', transmuxer.trigger.bind(transmuxer, 'endedtimeline'));
pipeline.on('audioTimingInfo', transmuxer.trigger.bind(transmuxer, 'audioTimingInfo'));
pipeline.on('videoTimingInfo', transmuxer.trigger.bind(transmuxer, 'videoTimingInfo'));
pipeline.on('trackinfo', transmuxer.trigger.bind(transmuxer, 'trackinfo'));
pipeline.on('id3Frame', function (event) {
// add this to every single emitted segment even though it's only needed for the first
event.dispatchType = pipeline.metadataStream.dispatchType; // keep original time, can be adjusted if needed at a higher level
event.cueTime = clock.videoTsToSeconds(event.pts);
transmuxer.trigger('id3Frame', event);
});
pipeline.on('caption', function (event) {
transmuxer.trigger('caption', event);
});
};
var Transmuxer = function Transmuxer(options) {
var pipeline = null,
hasFlushed = true;
options = options || {};
Transmuxer.prototype.init.call(this);
options.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;
this.push = function (bytes) {
if (hasFlushed) {
var isAac = isLikelyAacData(bytes);
if (isAac && (!pipeline || pipeline.type !== 'aac')) {
pipeline = aacPipeline(options);
setupPipelineListeners(pipeline, this);
} else if (!isAac && (!pipeline || pipeline.type !== 'ts')) {
pipeline = tsPipeline(options);
setupPipelineListeners(pipeline, this);
}
hasFlushed = false;
}
pipeline.headOfPipeline.push(bytes);
};
this.flush = function () {
if (!pipeline) {
return;
}
hasFlushed = true;
pipeline.headOfPipeline.flush();
};
this.partialFlush = function () {
if (!pipeline) {
return;
}
pipeline.headOfPipeline.partialFlush();
};
this.endTimeline = function () {
if (!pipeline) {
return;
}
pipeline.headOfPipeline.endTimeline();
};
this.reset = function () {
if (!pipeline) {
return;
}
pipeline.headOfPipeline.reset();
};
this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {
if (!options.keepOriginalTimestamps) {
options.baseMediaDecodeTime = baseMediaDecodeTime;
}
if (!pipeline) {
return;
}
if (pipeline.tracks.audio) {
pipeline.tracks.audio.timelineStartInfo.dts = undefined;
pipeline.tracks.audio.timelineStartInfo.pts = undefined;
trackInfo.clearDtsInfo(pipeline.tracks.audio);
if (pipeline.audioRollover) {
pipeline.audioRollover.discontinuity();
}
}
if (pipeline.tracks.video) {
if (pipeline.videoSegmentStream) {
pipeline.videoSegmentStream.gopCache_ = [];
}
pipeline.tracks.video.timelineStartInfo.dts = undefined;
pipeline.tracks.video.timelineStartInfo.pts = undefined;
trackInfo.clearDtsInfo(pipeline.tracks.video); // pipeline.captionStream.reset();
}
if (pipeline.timestampRollover) {
pipeline.timestampRollover.discontinuity();
}
};
this.setRemux = function (val) {
options.remux = val;
if (pipeline && pipeline.coalesceStream) {
pipeline.coalesceStream.setRemux(val);
}
};
this.setAudioAppendStart = function (audioAppendStart) {
if (!pipeline || !pipeline.tracks.audio || !pipeline.audioSegmentStream) {
return;
}
pipeline.audioSegmentStream.setAudioAppendStart(audioAppendStart);
}; // TODO GOP alignment support
// Support may be a bit trickier than with full segment appends, as GOPs may be split
// and processed in a more granular fashion
this.alignGopsWith = function (gopsToAlignWith) {
return;
};
};
Transmuxer.prototype = new Stream();
module.exports = Transmuxer;

388
node_modules/mux.js/cjs/partial/video-segment-stream.js generated vendored
View file

@ -1,195 +1,195 @@
/**
* Constructs a single-track, ISO BMFF media segment from H264 data
* events. The output of this stream can be fed to a SourceBuffer
* configured with a suitable initialization segment.
* @param track {object} track metadata configuration
* @param options {object} transmuxer options object
* @param options.alignGopsAtEnd {boolean} If true, start from the end of the
* gopsToAlignWith list when attempting to align gop pts
*/
'use strict';
var Stream = require('../utils/stream.js');
var mp4 = require('../mp4/mp4-generator.js');
var trackInfo = require('../mp4/track-decode-info.js');
var frameUtils = require('../mp4/frame-utils');
var VIDEO_PROPERTIES = require('../constants/video-properties.js');
var VideoSegmentStream = function VideoSegmentStream(track, options) {
var sequenceNumber = 0,
nalUnits = [],
frameCache = [],
// gopsToAlignWith = [],
config,
pps,
segmentStartPts = null,
segmentEndPts = null,
gops,
ensureNextFrameIsKeyFrame = true;
options = options || {};
VideoSegmentStream.prototype.init.call(this);
this.push = function (nalUnit) {
trackInfo.collectDtsInfo(track, nalUnit);
if (typeof track.timelineStartInfo.dts === 'undefined') {
track.timelineStartInfo.dts = nalUnit.dts;
} // record the track config
if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {
config = nalUnit.config;
track.sps = [nalUnit.data];
VIDEO_PROPERTIES.forEach(function (prop) {
track[prop] = config[prop];
}, this);
}
if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {
pps = nalUnit.data;
track.pps = [nalUnit.data];
} // buffer video until flush() is called
nalUnits.push(nalUnit);
};
this.processNals_ = function (cacheLastFrame) {
var i;
nalUnits = frameCache.concat(nalUnits); // Throw away nalUnits at the start of the byte stream until
// we find the first AUD
while (nalUnits.length) {
if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {
break;
}
nalUnits.shift();
} // Return early if no video data has been observed
if (nalUnits.length === 0) {
return;
}
var frames = frameUtils.groupNalsIntoFrames(nalUnits);
if (!frames.length) {
return;
} // note that the frame cache may also protect us from cases where we haven't
// pushed data for the entire first or last frame yet
frameCache = frames[frames.length - 1];
if (cacheLastFrame) {
frames.pop();
frames.duration -= frameCache.duration;
frames.nalCount -= frameCache.length;
frames.byteLength -= frameCache.byteLength;
}
if (!frames.length) {
nalUnits = [];
return;
}
this.trigger('timelineStartInfo', track.timelineStartInfo);
if (ensureNextFrameIsKeyFrame) {
gops = frameUtils.groupFramesIntoGops(frames);
if (!gops[0][0].keyFrame) {
gops = frameUtils.extendFirstKeyFrame(gops);
if (!gops[0][0].keyFrame) {
// we haven't yet gotten a key frame, so reset nal units to wait for more nal
// units
nalUnits = [].concat.apply([], frames).concat(frameCache);
frameCache = [];
return;
}
frames = [].concat.apply([], gops);
frames.duration = gops.duration;
}
ensureNextFrameIsKeyFrame = false;
}
if (segmentStartPts === null) {
segmentStartPts = frames[0].pts;
segmentEndPts = segmentStartPts;
}
segmentEndPts += frames.duration;
this.trigger('timingInfo', {
start: segmentStartPts,
end: segmentEndPts
});
for (i = 0; i < frames.length; i++) {
var frame = frames[i];
track.samples = frameUtils.generateSampleTableForFrame(frame);
var mdat = mp4.mdat(frameUtils.concatenateNalDataForFrame(frame));
trackInfo.clearDtsInfo(track);
trackInfo.collectDtsInfo(track, frame);
track.baseMediaDecodeTime = trackInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
var moof = mp4.moof(sequenceNumber, [track]);
sequenceNumber++;
track.initSegment = mp4.initSegment([track]);
var boxes = new Uint8Array(moof.byteLength + mdat.byteLength);
boxes.set(moof);
boxes.set(mdat, moof.byteLength);
this.trigger('data', {
track: track,
boxes: boxes,
sequence: sequenceNumber,
videoFrameDts: frame.dts,
videoFramePts: frame.pts
});
}
nalUnits = [];
};
this.resetTimingAndConfig_ = function () {
config = undefined;
pps = undefined;
segmentStartPts = null;
segmentEndPts = null;
};
this.partialFlush = function () {
this.processNals_(true);
this.trigger('partialdone', 'VideoSegmentStream');
};
this.flush = function () {
this.processNals_(false); // reset config and pps because they may differ across segments
// for instance, when we are rendition switching
this.resetTimingAndConfig_();
this.trigger('done', 'VideoSegmentStream');
};
this.endTimeline = function () {
this.flush();
this.trigger('endedtimeline', 'VideoSegmentStream');
};
this.reset = function () {
this.resetTimingAndConfig_();
frameCache = [];
nalUnits = [];
ensureNextFrameIsKeyFrame = true;
this.trigger('reset');
};
};
VideoSegmentStream.prototype = new Stream();
/**
* Constructs a single-track, ISO BMFF media segment from H264 data
* events. The output of this stream can be fed to a SourceBuffer
* configured with a suitable initialization segment.
* @param track {object} track metadata configuration
* @param options {object} transmuxer options object
* @param options.alignGopsAtEnd {boolean} If true, start from the end of the
* gopsToAlignWith list when attempting to align gop pts
*/
'use strict';
var Stream = require('../utils/stream.js');
var mp4 = require('../mp4/mp4-generator.js');
var trackInfo = require('../mp4/track-decode-info.js');
var frameUtils = require('../mp4/frame-utils');
var VIDEO_PROPERTIES = require('../constants/video-properties.js');
var VideoSegmentStream = function VideoSegmentStream(track, options) {
var sequenceNumber = 0,
nalUnits = [],
frameCache = [],
// gopsToAlignWith = [],
config,
pps,
segmentStartPts = null,
segmentEndPts = null,
gops,
ensureNextFrameIsKeyFrame = true;
options = options || {};
VideoSegmentStream.prototype.init.call(this);
this.push = function (nalUnit) {
trackInfo.collectDtsInfo(track, nalUnit);
if (typeof track.timelineStartInfo.dts === 'undefined') {
track.timelineStartInfo.dts = nalUnit.dts;
} // record the track config
if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {
config = nalUnit.config;
track.sps = [nalUnit.data];
VIDEO_PROPERTIES.forEach(function (prop) {
track[prop] = config[prop];
}, this);
}
if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {
pps = nalUnit.data;
track.pps = [nalUnit.data];
} // buffer video until flush() is called
nalUnits.push(nalUnit);
};
this.processNals_ = function (cacheLastFrame) {
var i;
nalUnits = frameCache.concat(nalUnits); // Throw away nalUnits at the start of the byte stream until
// we find the first AUD
while (nalUnits.length) {
if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {
break;
}
nalUnits.shift();
} // Return early if no video data has been observed
if (nalUnits.length === 0) {
return;
}
var frames = frameUtils.groupNalsIntoFrames(nalUnits);
if (!frames.length) {
return;
} // note that the frame cache may also protect us from cases where we haven't
// pushed data for the entire first or last frame yet
frameCache = frames[frames.length - 1];
if (cacheLastFrame) {
frames.pop();
frames.duration -= frameCache.duration;
frames.nalCount -= frameCache.length;
frames.byteLength -= frameCache.byteLength;
}
if (!frames.length) {
nalUnits = [];
return;
}
this.trigger('timelineStartInfo', track.timelineStartInfo);
if (ensureNextFrameIsKeyFrame) {
gops = frameUtils.groupFramesIntoGops(frames);
if (!gops[0][0].keyFrame) {
gops = frameUtils.extendFirstKeyFrame(gops);
if (!gops[0][0].keyFrame) {
// we haven't yet gotten a key frame, so reset nal units to wait for more nal
// units
nalUnits = [].concat.apply([], frames).concat(frameCache);
frameCache = [];
return;
}
frames = [].concat.apply([], gops);
frames.duration = gops.duration;
}
ensureNextFrameIsKeyFrame = false;
}
if (segmentStartPts === null) {
segmentStartPts = frames[0].pts;
segmentEndPts = segmentStartPts;
}
segmentEndPts += frames.duration;
this.trigger('timingInfo', {
start: segmentStartPts,
end: segmentEndPts
});
for (i = 0; i < frames.length; i++) {
var frame = frames[i];
track.samples = frameUtils.generateSampleTableForFrame(frame);
var mdat = mp4.mdat(frameUtils.concatenateNalDataForFrame(frame));
trackInfo.clearDtsInfo(track);
trackInfo.collectDtsInfo(track, frame);
track.baseMediaDecodeTime = trackInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);
var moof = mp4.moof(sequenceNumber, [track]);
sequenceNumber++;
track.initSegment = mp4.initSegment([track]);
var boxes = new Uint8Array(moof.byteLength + mdat.byteLength);
boxes.set(moof);
boxes.set(mdat, moof.byteLength);
this.trigger('data', {
track: track,
boxes: boxes,
sequence: sequenceNumber,
videoFrameDts: frame.dts,
videoFramePts: frame.pts
});
}
nalUnits = [];
};
this.resetTimingAndConfig_ = function () {
config = undefined;
pps = undefined;
segmentStartPts = null;
segmentEndPts = null;
};
this.partialFlush = function () {
this.processNals_(true);
this.trigger('partialdone', 'VideoSegmentStream');
};
this.flush = function () {
this.processNals_(false); // reset config and pps because they may differ across segments
// for instance, when we are rendition switching
this.resetTimingAndConfig_();
this.trigger('done', 'VideoSegmentStream');
};
this.endTimeline = function () {
this.flush();
this.trigger('endedtimeline', 'VideoSegmentStream');
};
this.reset = function () {
this.resetTimingAndConfig_();
frameCache = [];
nalUnits = [];
ensureNextFrameIsKeyFrame = true;
this.trigger('reset');
};
};
VideoSegmentStream.prototype = new Stream();
module.exports = VideoSegmentStream;

376
node_modules/mux.js/cjs/tools/caption-packet-parser.js generated vendored
View file

@ -1,189 +1,189 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Reads in-band caption information from a video elementary
* stream. Captions must follow the CEA-708 standard for injection
* into an MPEG-2 transport streams.
* @see https://en.wikipedia.org/wiki/CEA-708
* @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf
*/
'use strict'; // Supplemental enhancement information (SEI) NAL units have a
// payload type field to indicate how they are to be
// interpreted. CEAS-708 caption content is always transmitted with
// payload type 0x04.
var USER_DATA_REGISTERED_ITU_T_T35 = 4,
RBSP_TRAILING_BITS = 128;
/**
* Parse a supplemental enhancement information (SEI) NAL unit.
* Stops parsing once a message of type ITU T T35 has been found.
*
* @param bytes {Uint8Array} the bytes of a SEI NAL unit
* @return {object} the parsed SEI payload
* @see Rec. ITU-T H.264, 7.3.2.3.1
*/
var parseSei = function parseSei(bytes) {
var i = 0,
result = {
payloadType: -1,
payloadSize: 0
},
payloadType = 0,
payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message
while (i < bytes.byteLength) {
// stop once we have hit the end of the sei_rbsp
if (bytes[i] === RBSP_TRAILING_BITS) {
break;
} // Parse payload type
while (bytes[i] === 0xFF) {
payloadType += 255;
i++;
}
payloadType += bytes[i++]; // Parse payload size
while (bytes[i] === 0xFF) {
payloadSize += 255;
i++;
}
payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break
// there can only ever be one caption message in a frame's sei
if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {
var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);
if (userIdentifier === 'GA94') {
result.payloadType = payloadType;
result.payloadSize = payloadSize;
result.payload = bytes.subarray(i, i + payloadSize);
break;
} else {
result.payload = void 0;
}
} // skip the payload and parse the next message
i += payloadSize;
payloadType = 0;
payloadSize = 0;
}
return result;
}; // see ANSI/SCTE 128-1 (2013), section 8.1
var parseUserData = function parseUserData(sei) {
// itu_t_t35_contry_code must be 181 (United States) for
// captions
if (sei.payload[0] !== 181) {
return null;
} // itu_t_t35_provider_code should be 49 (ATSC) for captions
if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {
return null;
} // the user_identifier should be "GA94" to indicate ATSC1 data
if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {
return null;
} // finally, user_data_type_code should be 0x03 for caption data
if (sei.payload[7] !== 0x03) {
return null;
} // return the user_data_type_structure and strip the trailing
// marker bits
return sei.payload.subarray(8, sei.payload.length - 1);
}; // see CEA-708-D, section 4.4
var parseCaptionPackets = function parseCaptionPackets(pts, userData) {
var results = [],
i,
count,
offset,
data; // if this is just filler, return immediately
if (!(userData[0] & 0x40)) {
return results;
} // parse out the cc_data_1 and cc_data_2 fields
count = userData[0] & 0x1f;
for (i = 0; i < count; i++) {
offset = i * 3;
data = {
type: userData[offset + 2] & 0x03,
pts: pts
}; // capture cc data when cc_valid is 1
if (userData[offset + 2] & 0x04) {
data.ccData = userData[offset + 3] << 8 | userData[offset + 4];
results.push(data);
}
}
return results;
};
var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {
var length = data.byteLength,
emulationPreventionBytesPositions = [],
i = 1,
newLength,
newData; // Find all `Emulation Prevention Bytes`
while (i < length - 2) {
if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
emulationPreventionBytesPositions.push(i + 2);
i += 2;
} else {
i++;
}
} // If no Emulation Prevention Bytes were found just return the original
// array
if (emulationPreventionBytesPositions.length === 0) {
return data;
} // Create a new array to hold the NAL unit data
newLength = length - emulationPreventionBytesPositions.length;
newData = new Uint8Array(newLength);
var sourceIndex = 0;
for (i = 0; i < newLength; sourceIndex++, i++) {
if (sourceIndex === emulationPreventionBytesPositions[0]) {
// Skip this byte
sourceIndex++; // Remove this position index
emulationPreventionBytesPositions.shift();
}
newData[i] = data[sourceIndex];
}
return newData;
}; // exports
module.exports = {
parseSei: parseSei,
parseUserData: parseUserData,
parseCaptionPackets: parseCaptionPackets,
discardEmulationPreventionBytes: discardEmulationPreventionBytes,
USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* Reads in-band caption information from a video elementary
* stream. Captions must follow the CEA-708 standard for injection
* into an MPEG-2 transport streams.
* @see https://en.wikipedia.org/wiki/CEA-708
* @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf
*/
'use strict'; // Supplemental enhancement information (SEI) NAL units have a
// payload type field to indicate how they are to be
// interpreted. CEAS-708 caption content is always transmitted with
// payload type 0x04.
var USER_DATA_REGISTERED_ITU_T_T35 = 4,
RBSP_TRAILING_BITS = 128;
/**
* Parse a supplemental enhancement information (SEI) NAL unit.
* Stops parsing once a message of type ITU T T35 has been found.
*
* @param bytes {Uint8Array} the bytes of a SEI NAL unit
* @return {object} the parsed SEI payload
* @see Rec. ITU-T H.264, 7.3.2.3.1
*/
var parseSei = function parseSei(bytes) {
var i = 0,
result = {
payloadType: -1,
payloadSize: 0
},
payloadType = 0,
payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message
while (i < bytes.byteLength) {
// stop once we have hit the end of the sei_rbsp
if (bytes[i] === RBSP_TRAILING_BITS) {
break;
} // Parse payload type
while (bytes[i] === 0xFF) {
payloadType += 255;
i++;
}
payloadType += bytes[i++]; // Parse payload size
while (bytes[i] === 0xFF) {
payloadSize += 255;
i++;
}
payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break
// there can only ever be one caption message in a frame's sei
if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {
var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);
if (userIdentifier === 'GA94') {
result.payloadType = payloadType;
result.payloadSize = payloadSize;
result.payload = bytes.subarray(i, i + payloadSize);
break;
} else {
result.payload = void 0;
}
} // skip the payload and parse the next message
i += payloadSize;
payloadType = 0;
payloadSize = 0;
}
return result;
}; // see ANSI/SCTE 128-1 (2013), section 8.1
var parseUserData = function parseUserData(sei) {
// itu_t_t35_contry_code must be 181 (United States) for
// captions
if (sei.payload[0] !== 181) {
return null;
} // itu_t_t35_provider_code should be 49 (ATSC) for captions
if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {
return null;
} // the user_identifier should be "GA94" to indicate ATSC1 data
if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {
return null;
} // finally, user_data_type_code should be 0x03 for caption data
if (sei.payload[7] !== 0x03) {
return null;
} // return the user_data_type_structure and strip the trailing
// marker bits
return sei.payload.subarray(8, sei.payload.length - 1);
}; // see CEA-708-D, section 4.4
var parseCaptionPackets = function parseCaptionPackets(pts, userData) {
var results = [],
i,
count,
offset,
data; // if this is just filler, return immediately
if (!(userData[0] & 0x40)) {
return results;
} // parse out the cc_data_1 and cc_data_2 fields
count = userData[0] & 0x1f;
for (i = 0; i < count; i++) {
offset = i * 3;
data = {
type: userData[offset + 2] & 0x03,
pts: pts
}; // capture cc data when cc_valid is 1
if (userData[offset + 2] & 0x04) {
data.ccData = userData[offset + 3] << 8 | userData[offset + 4];
results.push(data);
}
}
return results;
};
var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {
var length = data.byteLength,
emulationPreventionBytesPositions = [],
i = 1,
newLength,
newData; // Find all `Emulation Prevention Bytes`
while (i < length - 2) {
if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
emulationPreventionBytesPositions.push(i + 2);
i += 2;
} else {
i++;
}
} // If no Emulation Prevention Bytes were found just return the original
// array
if (emulationPreventionBytesPositions.length === 0) {
return data;
} // Create a new array to hold the NAL unit data
newLength = length - emulationPreventionBytesPositions.length;
newData = new Uint8Array(newLength);
var sourceIndex = 0;
for (i = 0; i < newLength; sourceIndex++, i++) {
if (sourceIndex === emulationPreventionBytesPositions[0]) {
// Skip this byte
sourceIndex++; // Remove this position index
emulationPreventionBytesPositions.shift();
}
newData[i] = data[sourceIndex];
}
return newData;
}; // exports
module.exports = {
parseSei: parseSei,
parseUserData: parseUserData,
parseCaptionPackets: parseCaptionPackets,
discardEmulationPreventionBytes: discardEmulationPreventionBytes,
USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35
};

266
node_modules/mux.js/cjs/tools/flv-inspector.js generated vendored
View file

@ -1,134 +1,134 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var tagTypes = {
0x08: 'audio',
0x09: 'video',
0x12: 'metadata'
},
hex = function hex(val) {
return '0x' + ('00' + val.toString(16)).slice(-2).toUpperCase();
},
hexStringList = function hexStringList(data) {
var arr = [],
i;
while (data.byteLength > 0) {
i = 0;
arr.push(hex(data[i++]));
data = data.subarray(i);
}
return arr.join(' ');
},
parseAVCTag = function parseAVCTag(tag, obj) {
var avcPacketTypes = ['AVC Sequence Header', 'AVC NALU', 'AVC End-of-Sequence'],
compositionTime = tag[1] & parseInt('01111111', 2) << 16 | tag[2] << 8 | tag[3];
obj = obj || {};
obj.avcPacketType = avcPacketTypes[tag[0]];
obj.CompositionTime = tag[1] & parseInt('10000000', 2) ? -compositionTime : compositionTime;
if (tag[0] === 1) {
obj.nalUnitTypeRaw = hexStringList(tag.subarray(4, 100));
} else {
obj.data = hexStringList(tag.subarray(4));
}
return obj;
},
parseVideoTag = function parseVideoTag(tag, obj) {
var frameTypes = ['Unknown', 'Keyframe (for AVC, a seekable frame)', 'Inter frame (for AVC, a nonseekable frame)', 'Disposable inter frame (H.263 only)', 'Generated keyframe (reserved for server use only)', 'Video info/command frame'],
codecID = tag[0] & parseInt('00001111', 2);
obj = obj || {};
obj.frameType = frameTypes[(tag[0] & parseInt('11110000', 2)) >>> 4];
obj.codecID = codecID;
if (codecID === 7) {
return parseAVCTag(tag.subarray(1), obj);
}
return obj;
},
parseAACTag = function parseAACTag(tag, obj) {
var packetTypes = ['AAC Sequence Header', 'AAC Raw'];
obj = obj || {};
obj.aacPacketType = packetTypes[tag[0]];
obj.data = hexStringList(tag.subarray(1));
return obj;
},
parseAudioTag = function parseAudioTag(tag, obj) {
var formatTable = ['Linear PCM, platform endian', 'ADPCM', 'MP3', 'Linear PCM, little endian', 'Nellymoser 16-kHz mono', 'Nellymoser 8-kHz mono', 'Nellymoser', 'G.711 A-law logarithmic PCM', 'G.711 mu-law logarithmic PCM', 'reserved', 'AAC', 'Speex', 'MP3 8-Khz', 'Device-specific sound'],
samplingRateTable = ['5.5-kHz', '11-kHz', '22-kHz', '44-kHz'],
soundFormat = (tag[0] & parseInt('11110000', 2)) >>> 4;
obj = obj || {};
obj.soundFormat = formatTable[soundFormat];
obj.soundRate = samplingRateTable[(tag[0] & parseInt('00001100', 2)) >>> 2];
obj.soundSize = (tag[0] & parseInt('00000010', 2)) >>> 1 ? '16-bit' : '8-bit';
obj.soundType = tag[0] & parseInt('00000001', 2) ? 'Stereo' : 'Mono';
if (soundFormat === 10) {
return parseAACTag(tag.subarray(1), obj);
}
return obj;
},
parseGenericTag = function parseGenericTag(tag) {
return {
tagType: tagTypes[tag[0]],
dataSize: tag[1] << 16 | tag[2] << 8 | tag[3],
timestamp: tag[7] << 24 | tag[4] << 16 | tag[5] << 8 | tag[6],
streamID: tag[8] << 16 | tag[9] << 8 | tag[10]
};
},
inspectFlvTag = function inspectFlvTag(tag) {
var header = parseGenericTag(tag);
switch (tag[0]) {
case 0x08:
parseAudioTag(tag.subarray(11), header);
break;
case 0x09:
parseVideoTag(tag.subarray(11), header);
break;
case 0x12:
}
return header;
},
inspectFlv = function inspectFlv(bytes) {
var i = 9,
// header
dataSize,
parsedResults = [],
tag; // traverse the tags
i += 4; // skip previous tag size
while (i < bytes.byteLength) {
dataSize = bytes[i + 1] << 16;
dataSize |= bytes[i + 2] << 8;
dataSize |= bytes[i + 3];
dataSize += 11;
tag = bytes.subarray(i, i + dataSize);
parsedResults.push(inspectFlvTag(tag));
i += dataSize + 4;
}
return parsedResults;
},
textifyFlv = function textifyFlv(flvTagArray) {
return JSON.stringify(flvTagArray, null, 2);
};
module.exports = {
inspectTag: inspectFlvTag,
inspect: inspectFlv,
textify: textifyFlv
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
'use strict';
var tagTypes = {
0x08: 'audio',
0x09: 'video',
0x12: 'metadata'
},
hex = function hex(val) {
return '0x' + ('00' + val.toString(16)).slice(-2).toUpperCase();
},
hexStringList = function hexStringList(data) {
var arr = [],
i;
while (data.byteLength > 0) {
i = 0;
arr.push(hex(data[i++]));
data = data.subarray(i);
}
return arr.join(' ');
},
parseAVCTag = function parseAVCTag(tag, obj) {
var avcPacketTypes = ['AVC Sequence Header', 'AVC NALU', 'AVC End-of-Sequence'],
compositionTime = tag[1] & parseInt('01111111', 2) << 16 | tag[2] << 8 | tag[3];
obj = obj || {};
obj.avcPacketType = avcPacketTypes[tag[0]];
obj.CompositionTime = tag[1] & parseInt('10000000', 2) ? -compositionTime : compositionTime;
if (tag[0] === 1) {
obj.nalUnitTypeRaw = hexStringList(tag.subarray(4, 100));
} else {
obj.data = hexStringList(tag.subarray(4));
}
return obj;
},
parseVideoTag = function parseVideoTag(tag, obj) {
var frameTypes = ['Unknown', 'Keyframe (for AVC, a seekable frame)', 'Inter frame (for AVC, a nonseekable frame)', 'Disposable inter frame (H.263 only)', 'Generated keyframe (reserved for server use only)', 'Video info/command frame'],
codecID = tag[0] & parseInt('00001111', 2);
obj = obj || {};
obj.frameType = frameTypes[(tag[0] & parseInt('11110000', 2)) >>> 4];
obj.codecID = codecID;
if (codecID === 7) {
return parseAVCTag(tag.subarray(1), obj);
}
return obj;
},
parseAACTag = function parseAACTag(tag, obj) {
var packetTypes = ['AAC Sequence Header', 'AAC Raw'];
obj = obj || {};
obj.aacPacketType = packetTypes[tag[0]];
obj.data = hexStringList(tag.subarray(1));
return obj;
},
parseAudioTag = function parseAudioTag(tag, obj) {
var formatTable = ['Linear PCM, platform endian', 'ADPCM', 'MP3', 'Linear PCM, little endian', 'Nellymoser 16-kHz mono', 'Nellymoser 8-kHz mono', 'Nellymoser', 'G.711 A-law logarithmic PCM', 'G.711 mu-law logarithmic PCM', 'reserved', 'AAC', 'Speex', 'MP3 8-Khz', 'Device-specific sound'],
samplingRateTable = ['5.5-kHz', '11-kHz', '22-kHz', '44-kHz'],
soundFormat = (tag[0] & parseInt('11110000', 2)) >>> 4;
obj = obj || {};
obj.soundFormat = formatTable[soundFormat];
obj.soundRate = samplingRateTable[(tag[0] & parseInt('00001100', 2)) >>> 2];
obj.soundSize = (tag[0] & parseInt('00000010', 2)) >>> 1 ? '16-bit' : '8-bit';
obj.soundType = tag[0] & parseInt('00000001', 2) ? 'Stereo' : 'Mono';
if (soundFormat === 10) {
return parseAACTag(tag.subarray(1), obj);
}
return obj;
},
parseGenericTag = function parseGenericTag(tag) {
return {
tagType: tagTypes[tag[0]],
dataSize: tag[1] << 16 | tag[2] << 8 | tag[3],
timestamp: tag[7] << 24 | tag[4] << 16 | tag[5] << 8 | tag[6],
streamID: tag[8] << 16 | tag[9] << 8 | tag[10]
};
},
inspectFlvTag = function inspectFlvTag(tag) {
var header = parseGenericTag(tag);
switch (tag[0]) {
case 0x08:
parseAudioTag(tag.subarray(11), header);
break;
case 0x09:
parseVideoTag(tag.subarray(11), header);
break;
case 0x12:
}
return header;
},
inspectFlv = function inspectFlv(bytes) {
var i = 9,
// header
dataSize,
parsedResults = [],
tag; // traverse the tags
i += 4; // skip previous tag size
while (i < bytes.byteLength) {
dataSize = bytes[i + 1] << 16;
dataSize |= bytes[i + 2] << 8;
dataSize |= bytes[i + 3];
dataSize += 11;
tag = bytes.subarray(i, i + dataSize);
parsedResults.push(inspectFlvTag(tag));
i += dataSize + 4;
}
return parsedResults;
},
textifyFlv = function textifyFlv(flvTagArray) {
return JSON.stringify(flvTagArray, null, 2);
};
module.exports = {
inspectTag: inspectFlvTag,
inspect: inspectFlv,
textify: textifyFlv
};

1507
node_modules/mux.js/cjs/tools/mp4-inspector.js generated vendored
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28
node_modules/mux.js/cjs/tools/parse-sample-flags.js generated vendored
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@ -1,15 +1,15 @@
"use strict";
var parseSampleFlags = function parseSampleFlags(flags) {
return {
isLeading: (flags[0] & 0x0c) >>> 2,
dependsOn: flags[0] & 0x03,
isDependedOn: (flags[1] & 0xc0) >>> 6,
hasRedundancy: (flags[1] & 0x30) >>> 4,
paddingValue: (flags[1] & 0x0e) >>> 1,
isNonSyncSample: flags[1] & 0x01,
degradationPriority: flags[2] << 8 | flags[3]
};
};
"use strict";
var parseSampleFlags = function parseSampleFlags(flags) {
return {
isLeading: (flags[0] & 0x0c) >>> 2,
dependsOn: flags[0] & 0x03,
isDependedOn: (flags[1] & 0xc0) >>> 6,
hasRedundancy: (flags[1] & 0x30) >>> 4,
paddingValue: (flags[1] & 0x0e) >>> 1,
isNonSyncSample: flags[1] & 0x01,
degradationPriority: flags[2] << 8 | flags[3]
};
};
module.exports = parseSampleFlags;

90
node_modules/mux.js/cjs/tools/parse-sidx.js generated vendored
View file

@ -1,46 +1,46 @@
"use strict";
var MAX_UINT32 = Math.pow(2, 32);
var parseSidx = function parseSidx(data) {
var view = new DataView(data.buffer, data.byteOffset, data.byteLength),
result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
references: [],
referenceId: view.getUint32(4),
timescale: view.getUint32(8)
},
i = 12;
if (result.version === 0) {
result.earliestPresentationTime = view.getUint32(i);
result.firstOffset = view.getUint32(i + 4);
i += 8;
} else {
// read 64 bits
result.earliestPresentationTime = view.getUint32(i) * MAX_UINT32 + view.getUint32(i + 4);
result.firstOffset = view.getUint32(i + 8) * MAX_UINT32 + view.getUint32(i + 12);
i += 16;
}
i += 2; // reserved
var referenceCount = view.getUint16(i);
i += 2; // start of references
for (; referenceCount > 0; i += 12, referenceCount--) {
result.references.push({
referenceType: (data[i] & 0x80) >>> 7,
referencedSize: view.getUint32(i) & 0x7FFFFFFF,
subsegmentDuration: view.getUint32(i + 4),
startsWithSap: !!(data[i + 8] & 0x80),
sapType: (data[i + 8] & 0x70) >>> 4,
sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF
});
}
return result;
};
"use strict";
var getUint64 = require('../utils/numbers.js').getUint64;
var parseSidx = function parseSidx(data) {
var view = new DataView(data.buffer, data.byteOffset, data.byteLength),
result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
references: [],
referenceId: view.getUint32(4),
timescale: view.getUint32(8)
},
i = 12;
if (result.version === 0) {
result.earliestPresentationTime = view.getUint32(i);
result.firstOffset = view.getUint32(i + 4);
i += 8;
} else {
// read 64 bits
result.earliestPresentationTime = getUint64(data.subarray(i));
result.firstOffset = getUint64(data.subarray(i + 8));
i += 16;
}
i += 2; // reserved
var referenceCount = view.getUint16(i);
i += 2; // start of references
for (; referenceCount > 0; i += 12, referenceCount--) {
result.references.push({
referenceType: (data[i] & 0x80) >>> 7,
referencedSize: view.getUint32(i) & 0x7FFFFFFF,
subsegmentDuration: view.getUint32(i + 4),
startsWithSap: !!(data[i + 8] & 0x80),
sapType: (data[i + 8] & 0x70) >>> 4,
sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF
});
}
return result;
};
module.exports = parseSidx;

40
node_modules/mux.js/cjs/tools/parse-tfdt.js generated vendored
View file

@ -1,20 +1,22 @@
"use strict";
var toUnsigned = require('../utils/bin').toUnsigned;
var tfdt = function tfdt(data) {
var result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
baseMediaDecodeTime: toUnsigned(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7])
};
if (result.version === 1) {
result.baseMediaDecodeTime *= Math.pow(2, 32);
result.baseMediaDecodeTime += toUnsigned(data[8] << 24 | data[9] << 16 | data[10] << 8 | data[11]);
}
return result;
};
"use strict";
var toUnsigned = require('../utils/bin').toUnsigned;
var getUint64 = require('../utils/numbers.js').getUint64;
var tfdt = function tfdt(data) {
var result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4))
};
if (result.version === 1) {
result.baseMediaDecodeTime = getUint64(data.subarray(4));
} else {
result.baseMediaDecodeTime = toUnsigned(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);
}
return result;
};
module.exports = tfdt;

114
node_modules/mux.js/cjs/tools/parse-tfhd.js generated vendored
View file

@ -1,58 +1,58 @@
"use strict";
var tfhd = function tfhd(data) {
var view = new DataView(data.buffer, data.byteOffset, data.byteLength),
result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
trackId: view.getUint32(4)
},
baseDataOffsetPresent = result.flags[2] & 0x01,
sampleDescriptionIndexPresent = result.flags[2] & 0x02,
defaultSampleDurationPresent = result.flags[2] & 0x08,
defaultSampleSizePresent = result.flags[2] & 0x10,
defaultSampleFlagsPresent = result.flags[2] & 0x20,
durationIsEmpty = result.flags[0] & 0x010000,
defaultBaseIsMoof = result.flags[0] & 0x020000,
i;
i = 8;
if (baseDataOffsetPresent) {
i += 4; // truncate top 4 bytes
// FIXME: should we read the full 64 bits?
result.baseDataOffset = view.getUint32(12);
i += 4;
}
if (sampleDescriptionIndexPresent) {
result.sampleDescriptionIndex = view.getUint32(i);
i += 4;
}
if (defaultSampleDurationPresent) {
result.defaultSampleDuration = view.getUint32(i);
i += 4;
}
if (defaultSampleSizePresent) {
result.defaultSampleSize = view.getUint32(i);
i += 4;
}
if (defaultSampleFlagsPresent) {
result.defaultSampleFlags = view.getUint32(i);
}
if (durationIsEmpty) {
result.durationIsEmpty = true;
}
if (!baseDataOffsetPresent && defaultBaseIsMoof) {
result.baseDataOffsetIsMoof = true;
}
return result;
};
"use strict";
var tfhd = function tfhd(data) {
var view = new DataView(data.buffer, data.byteOffset, data.byteLength),
result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
trackId: view.getUint32(4)
},
baseDataOffsetPresent = result.flags[2] & 0x01,
sampleDescriptionIndexPresent = result.flags[2] & 0x02,
defaultSampleDurationPresent = result.flags[2] & 0x08,
defaultSampleSizePresent = result.flags[2] & 0x10,
defaultSampleFlagsPresent = result.flags[2] & 0x20,
durationIsEmpty = result.flags[0] & 0x010000,
defaultBaseIsMoof = result.flags[0] & 0x020000,
i;
i = 8;
if (baseDataOffsetPresent) {
i += 4; // truncate top 4 bytes
// FIXME: should we read the full 64 bits?
result.baseDataOffset = view.getUint32(12);
i += 4;
}
if (sampleDescriptionIndexPresent) {
result.sampleDescriptionIndex = view.getUint32(i);
i += 4;
}
if (defaultSampleDurationPresent) {
result.defaultSampleDuration = view.getUint32(i);
i += 4;
}
if (defaultSampleSizePresent) {
result.defaultSampleSize = view.getUint32(i);
i += 4;
}
if (defaultSampleFlagsPresent) {
result.defaultSampleFlags = view.getUint32(i);
}
if (durationIsEmpty) {
result.durationIsEmpty = true;
}
if (!baseDataOffsetPresent && defaultBaseIsMoof) {
result.baseDataOffsetIsMoof = true;
}
return result;
};
module.exports = tfhd;

200
node_modules/mux.js/cjs/tools/parse-trun.js generated vendored
View file

@ -1,101 +1,101 @@
"use strict";
var parseSampleFlags = require('./parse-sample-flags.js');
var trun = function trun(data) {
var result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
samples: []
},
view = new DataView(data.buffer, data.byteOffset, data.byteLength),
// Flag interpretation
dataOffsetPresent = result.flags[2] & 0x01,
// compare with 2nd byte of 0x1
firstSampleFlagsPresent = result.flags[2] & 0x04,
// compare with 2nd byte of 0x4
sampleDurationPresent = result.flags[1] & 0x01,
// compare with 2nd byte of 0x100
sampleSizePresent = result.flags[1] & 0x02,
// compare with 2nd byte of 0x200
sampleFlagsPresent = result.flags[1] & 0x04,
// compare with 2nd byte of 0x400
sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,
// compare with 2nd byte of 0x800
sampleCount = view.getUint32(4),
offset = 8,
sample;
if (dataOffsetPresent) {
// 32 bit signed integer
result.dataOffset = view.getInt32(offset);
offset += 4;
} // Overrides the flags for the first sample only. The order of
// optional values will be: duration, size, compositionTimeOffset
if (firstSampleFlagsPresent && sampleCount) {
sample = {
flags: parseSampleFlags(data.subarray(offset, offset + 4))
};
offset += 4;
if (sampleDurationPresent) {
sample.duration = view.getUint32(offset);
offset += 4;
}
if (sampleSizePresent) {
sample.size = view.getUint32(offset);
offset += 4;
}
if (sampleCompositionTimeOffsetPresent) {
if (result.version === 1) {
sample.compositionTimeOffset = view.getInt32(offset);
} else {
sample.compositionTimeOffset = view.getUint32(offset);
}
offset += 4;
}
result.samples.push(sample);
sampleCount--;
}
while (sampleCount--) {
sample = {};
if (sampleDurationPresent) {
sample.duration = view.getUint32(offset);
offset += 4;
}
if (sampleSizePresent) {
sample.size = view.getUint32(offset);
offset += 4;
}
if (sampleFlagsPresent) {
sample.flags = parseSampleFlags(data.subarray(offset, offset + 4));
offset += 4;
}
if (sampleCompositionTimeOffsetPresent) {
if (result.version === 1) {
sample.compositionTimeOffset = view.getInt32(offset);
} else {
sample.compositionTimeOffset = view.getUint32(offset);
}
offset += 4;
}
result.samples.push(sample);
}
return result;
};
"use strict";
var parseSampleFlags = require('./parse-sample-flags.js');
var trun = function trun(data) {
var result = {
version: data[0],
flags: new Uint8Array(data.subarray(1, 4)),
samples: []
},
view = new DataView(data.buffer, data.byteOffset, data.byteLength),
// Flag interpretation
dataOffsetPresent = result.flags[2] & 0x01,
// compare with 2nd byte of 0x1
firstSampleFlagsPresent = result.flags[2] & 0x04,
// compare with 2nd byte of 0x4
sampleDurationPresent = result.flags[1] & 0x01,
// compare with 2nd byte of 0x100
sampleSizePresent = result.flags[1] & 0x02,
// compare with 2nd byte of 0x200
sampleFlagsPresent = result.flags[1] & 0x04,
// compare with 2nd byte of 0x400
sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,
// compare with 2nd byte of 0x800
sampleCount = view.getUint32(4),
offset = 8,
sample;
if (dataOffsetPresent) {
// 32 bit signed integer
result.dataOffset = view.getInt32(offset);
offset += 4;
} // Overrides the flags for the first sample only. The order of
// optional values will be: duration, size, compositionTimeOffset
if (firstSampleFlagsPresent && sampleCount) {
sample = {
flags: parseSampleFlags(data.subarray(offset, offset + 4))
};
offset += 4;
if (sampleDurationPresent) {
sample.duration = view.getUint32(offset);
offset += 4;
}
if (sampleSizePresent) {
sample.size = view.getUint32(offset);
offset += 4;
}
if (sampleCompositionTimeOffsetPresent) {
if (result.version === 1) {
sample.compositionTimeOffset = view.getInt32(offset);
} else {
sample.compositionTimeOffset = view.getUint32(offset);
}
offset += 4;
}
result.samples.push(sample);
sampleCount--;
}
while (sampleCount--) {
sample = {};
if (sampleDurationPresent) {
sample.duration = view.getUint32(offset);
offset += 4;
}
if (sampleSizePresent) {
sample.size = view.getUint32(offset);
offset += 4;
}
if (sampleFlagsPresent) {
sample.flags = parseSampleFlags(data.subarray(offset, offset + 4));
offset += 4;
}
if (sampleCompositionTimeOffsetPresent) {
if (result.version === 1) {
sample.compositionTimeOffset = view.getInt32(offset);
} else {
sample.compositionTimeOffset = view.getUint32(offset);
}
offset += 4;
}
result.samples.push(sample);
}
return result;
};
module.exports = trun;

1108
node_modules/mux.js/cjs/tools/ts-inspector.js generated vendored
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38
node_modules/mux.js/cjs/utils/bin.js generated vendored
View file

@ -1,20 +1,20 @@
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var toUnsigned = function toUnsigned(value) {
return value >>> 0;
};
var toHexString = function toHexString(value) {
return ('00' + value.toString(16)).slice(-2);
};
module.exports = {
toUnsigned: toUnsigned,
toHexString: toHexString
"use strict";
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
var toUnsigned = function toUnsigned(value) {
return value >>> 0;
};
var toHexString = function toHexString(value) {
return ('00' + value.toString(16)).slice(-2);
};
module.exports = {
toUnsigned: toUnsigned,
toHexString: toHexString
};