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Revert "Commit updated Javascript packages"

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This reverts commit a88734348a.
This commit is contained in:
Gabe Kangas
2020-10-19 22:14:27 -07:00
parent a88734348a
commit 3f50ce9bfc
6368 changed files with 0 additions and 603959 deletions
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build/javascript/node_modules/mux.js/lib/m2ts/caption-stream.js generated vendored
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@@ -1,857 +0,0 @@
/**
* 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';
// -----------------
// Link To Transport
// -----------------
var Stream = require('../utils/stream');
var cea708Parser = require('../tools/caption-packet-parser');
var CaptionStream = function() {
CaptionStream.prototype.init.call(this);
this.captionPackets_ = [];
this.ccStreams_ = [
new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define
new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define
new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define
new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define
];
this.reset();
// forward data and done events from CCs to this CaptionStream
this.ccStreams_.forEach(function(cc) {
cc.on('data', this.trigger.bind(this, 'data'));
cc.on('partialdone', this.trigger.bind(this, 'partialdone'));
cc.on('done', this.trigger.bind(this, 'done'));
}, this);
};
CaptionStream.prototype = new Stream();
CaptionStream.prototype.push = function(event) {
var sei, userData, newCaptionPackets;
// only examine SEI NALs
if (event.nalUnitType !== 'sei_rbsp') {
return;
}
// parse the sei
sei = cea708Parser.parseSei(event.escapedRBSP);
// ignore everything but user_data_registered_itu_t_t35
if (sei.payloadType !== cea708Parser.USER_DATA_REGISTERED_ITU_T_T35) {
return;
}
// parse out the user data payload
userData = cea708Parser.parseUserData(sei);
// ignore unrecognized userData
if (!userData) {
return;
}
// Sometimes, the same segment # will be downloaded twice. To stop the
// caption data from being processed twice, we track the latest dts we've
// received and ignore everything with a dts before that. However, since
// data for a specific dts can be split across packets on either side of
// a segment boundary, we need to make sure we *don't* ignore the packets
// from the *next* segment that have dts === this.latestDts_. By constantly
// tracking the number of packets received with dts === this.latestDts_, we
// know how many should be ignored once we start receiving duplicates.
if (event.dts < this.latestDts_) {
// We've started getting older data, so set the flag.
this.ignoreNextEqualDts_ = true;
return;
} else if ((event.dts === this.latestDts_) && (this.ignoreNextEqualDts_)) {
this.numSameDts_--;
if (!this.numSameDts_) {
// We've received the last duplicate packet, time to start processing again
this.ignoreNextEqualDts_ = false;
}
return;
}
// parse out CC data packets and save them for later
newCaptionPackets = cea708Parser.parseCaptionPackets(event.pts, userData);
this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);
if (this.latestDts_ !== event.dts) {
this.numSameDts_ = 0;
}
this.numSameDts_++;
this.latestDts_ = event.dts;
};
CaptionStream.prototype.flushCCStreams = function(flushType) {
this.ccStreams_.forEach(function(cc) {
return flushType === 'flush' ? cc.flush() : cc.partialFlush();
}, this);
};
CaptionStream.prototype.flushStream = function(flushType) {
// make sure we actually parsed captions before proceeding
if (!this.captionPackets_.length) {
this.flushCCStreams(flushType);
return;
}
// In Chrome, the Array#sort function is not stable so add a
// presortIndex that we can use to ensure we get a stable-sort
this.captionPackets_.forEach(function(elem, idx) {
elem.presortIndex = idx;
});
// sort caption byte-pairs based on their PTS values
this.captionPackets_.sort(function(a, b) {
if (a.pts === b.pts) {
return a.presortIndex - b.presortIndex;
}
return a.pts - b.pts;
});
this.captionPackets_.forEach(function(packet) {
if (packet.type < 2) {
// Dispatch packet to the right Cea608Stream
this.dispatchCea608Packet(packet);
}
// this is where an 'else' would go for a dispatching packets
// to a theoretical Cea708Stream that handles SERVICEn data
}, this);
this.captionPackets_.length = 0;
this.flushCCStreams(flushType);
};
CaptionStream.prototype.flush = function() {
return this.flushStream('flush');
};
// Only called if handling partial data
CaptionStream.prototype.partialFlush = function() {
return this.flushStream('partialFlush');
};
CaptionStream.prototype.reset = function() {
this.latestDts_ = null;
this.ignoreNextEqualDts_ = false;
this.numSameDts_ = 0;
this.activeCea608Channel_ = [null, null];
this.ccStreams_.forEach(function(ccStream) {
ccStream.reset();
});
};
// From the CEA-608 spec:
/*
* When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed
* by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is
* used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair
* and subsequent data should then be processed according to the FCC rules. It may be necessary for the
* line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)
* to switch to captioning or Text.
*/
// With that in mind, we ignore any data between an XDS control code and a
// subsequent closed-captioning control code.
CaptionStream.prototype.dispatchCea608Packet = function(packet) {
// NOTE: packet.type is the CEA608 field
if (this.setsTextOrXDSActive(packet)) {
this.activeCea608Channel_[packet.type] = null;
} else if (this.setsChannel1Active(packet)) {
this.activeCea608Channel_[packet.type] = 0;
} else if (this.setsChannel2Active(packet)) {
this.activeCea608Channel_[packet.type] = 1;
}
if (this.activeCea608Channel_[packet.type] === null) {
// If we haven't received anything to set the active channel, or the
// packets are Text/XDS data, discard the data; we don't want jumbled
// captions
return;
}
this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);
};
CaptionStream.prototype.setsChannel1Active = function(packet) {
return ((packet.ccData & 0x7800) === 0x1000);
};
CaptionStream.prototype.setsChannel2Active = function(packet) {
return ((packet.ccData & 0x7800) === 0x1800);
};
CaptionStream.prototype.setsTextOrXDSActive = function(packet) {
return ((packet.ccData & 0x7100) === 0x0100) ||
((packet.ccData & 0x78fe) === 0x102a) ||
((packet.ccData & 0x78fe) === 0x182a);
};
// ----------------------
// Session to Application
// ----------------------
// This hash maps non-ASCII, special, and extended character codes to their
// proper Unicode equivalent. The first keys that are only a single byte
// are the non-standard ASCII characters, which simply map the CEA608 byte
// to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608
// character codes, but have their MSB bitmasked with 0x03 so that a lookup
// can be performed regardless of the field and data channel on which the
// character code was received.
var CHARACTER_TRANSLATION = {
0x2a: 0xe1, // á
0x5c: 0xe9, // é
0x5e: 0xed, // í
0x5f: 0xf3, // ó
0x60: 0xfa, // ú
0x7b: 0xe7, // ç
0x7c: 0xf7, // ÷
0x7d: 0xd1, // Ñ
0x7e: 0xf1, // ñ
0x7f: 0x2588, // █
0x0130: 0xae, // ®
0x0131: 0xb0, // °
0x0132: 0xbd, // ½
0x0133: 0xbf, // ¿
0x0134: 0x2122, // ™
0x0135: 0xa2, // ¢
0x0136: 0xa3, // £
0x0137: 0x266a, // ♪
0x0138: 0xe0, // à
0x0139: 0xa0, //
0x013a: 0xe8, // è
0x013b: 0xe2, // â
0x013c: 0xea, // ê
0x013d: 0xee, // î
0x013e: 0xf4, // ô
0x013f: 0xfb, // û
0x0220: 0xc1, // Á
0x0221: 0xc9, // É
0x0222: 0xd3, // Ó
0x0223: 0xda, // Ú
0x0224: 0xdc, // Ü
0x0225: 0xfc, // ü
0x0226: 0x2018, // ‘
0x0227: 0xa1, // ¡
0x0228: 0x2a, // *
0x0229: 0x27, // '
0x022a: 0x2014, // —
0x022b: 0xa9, // ©
0x022c: 0x2120, // ℠
0x022d: 0x2022, // •
0x022e: 0x201c, // “
0x022f: 0x201d, // ”
0x0230: 0xc0, // À
0x0231: 0xc2, // Â
0x0232: 0xc7, // Ç
0x0233: 0xc8, // È
0x0234: 0xca, // Ê
0x0235: 0xcb, // Ë
0x0236: 0xeb, // ë
0x0237: 0xce, // Î
0x0238: 0xcf, // Ï
0x0239: 0xef, // ï
0x023a: 0xd4, // Ô
0x023b: 0xd9, // Ù
0x023c: 0xf9, // ù
0x023d: 0xdb, // Û
0x023e: 0xab, // «
0x023f: 0xbb, // »
0x0320: 0xc3, // Ã
0x0321: 0xe3, // ã
0x0322: 0xcd, // Í
0x0323: 0xcc, // Ì
0x0324: 0xec, // ì
0x0325: 0xd2, // Ò
0x0326: 0xf2, // ò
0x0327: 0xd5, // Õ
0x0328: 0xf5, // õ
0x0329: 0x7b, // {
0x032a: 0x7d, // }
0x032b: 0x5c, // \
0x032c: 0x5e, // ^
0x032d: 0x5f, // _
0x032e: 0x7c, // |
0x032f: 0x7e, // ~
0x0330: 0xc4, // Ä
0x0331: 0xe4, // ä
0x0332: 0xd6, // Ö
0x0333: 0xf6, // ö
0x0334: 0xdf, // ß
0x0335: 0xa5, // ¥
0x0336: 0xa4, // ¤
0x0337: 0x2502, // │
0x0338: 0xc5, // Å
0x0339: 0xe5, // å
0x033a: 0xd8, // Ø
0x033b: 0xf8, // ø
0x033c: 0x250c, // ┌
0x033d: 0x2510, // ┐
0x033e: 0x2514, // └
0x033f: 0x2518 // ┘
};
var getCharFromCode = function(code) {
if (code === null) {
return '';
}
code = CHARACTER_TRANSLATION[code] || code;
return String.fromCharCode(code);
};
// the index of the last row in a CEA-608 display buffer
var BOTTOM_ROW = 14;
// This array is used for mapping PACs -> row #, since there's no way of
// getting it through bit logic.
var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620,
0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420];
// CEA-608 captions are rendered onto a 34x15 matrix of character
// cells. The "bottom" row is the last element in the outer array.
var createDisplayBuffer = function() {
var result = [], i = BOTTOM_ROW + 1;
while (i--) {
result.push('');
}
return result;
};
var Cea608Stream = function(field, dataChannel) {
Cea608Stream.prototype.init.call(this);
this.field_ = field || 0;
this.dataChannel_ = dataChannel || 0;
this.name_ = 'CC' + (((this.field_ << 1) | this.dataChannel_) + 1);
this.setConstants();
this.reset();
this.push = function(packet) {
var data, swap, char0, char1, text;
// remove the parity bits
data = packet.ccData & 0x7f7f;
// ignore duplicate control codes; the spec demands they're sent twice
if (data === this.lastControlCode_) {
this.lastControlCode_ = null;
return;
}
// Store control codes
if ((data & 0xf000) === 0x1000) {
this.lastControlCode_ = data;
} else if (data !== this.PADDING_) {
this.lastControlCode_ = null;
}
char0 = data >>> 8;
char1 = data & 0xff;
if (data === this.PADDING_) {
return;
} else if (data === this.RESUME_CAPTION_LOADING_) {
this.mode_ = 'popOn';
} else if (data === this.END_OF_CAPTION_) {
// If an EOC is received while in paint-on mode, the displayed caption
// text should be swapped to non-displayed memory as if it was a pop-on
// caption. Because of that, we should explicitly switch back to pop-on
// mode
this.mode_ = 'popOn';
this.clearFormatting(packet.pts);
// if a caption was being displayed, it's gone now
this.flushDisplayed(packet.pts);
// flip memory
swap = this.displayed_;
this.displayed_ = this.nonDisplayed_;
this.nonDisplayed_ = swap;
// start measuring the time to display the caption
this.startPts_ = packet.pts;
} else if (data === this.ROLL_UP_2_ROWS_) {
this.rollUpRows_ = 2;
this.setRollUp(packet.pts);
} else if (data === this.ROLL_UP_3_ROWS_) {
this.rollUpRows_ = 3;
this.setRollUp(packet.pts);
} else if (data === this.ROLL_UP_4_ROWS_) {
this.rollUpRows_ = 4;
this.setRollUp(packet.pts);
} else if (data === this.CARRIAGE_RETURN_) {
this.clearFormatting(packet.pts);
this.flushDisplayed(packet.pts);
this.shiftRowsUp_();
this.startPts_ = packet.pts;
} else if (data === this.BACKSPACE_) {
if (this.mode_ === 'popOn') {
this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);
} else {
this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);
}
} else if (data === this.ERASE_DISPLAYED_MEMORY_) {
this.flushDisplayed(packet.pts);
this.displayed_ = createDisplayBuffer();
} else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {
this.nonDisplayed_ = createDisplayBuffer();
} else if (data === this.RESUME_DIRECT_CAPTIONING_) {
if (this.mode_ !== 'paintOn') {
// NOTE: This should be removed when proper caption positioning is
// implemented
this.flushDisplayed(packet.pts);
this.displayed_ = createDisplayBuffer();
}
this.mode_ = 'paintOn';
this.startPts_ = packet.pts;
// Append special characters to caption text
} else if (this.isSpecialCharacter(char0, char1)) {
// Bitmask char0 so that we can apply character transformations
// regardless of field and data channel.
// Then byte-shift to the left and OR with char1 so we can pass the
// entire character code to `getCharFromCode`.
char0 = (char0 & 0x03) << 8;
text = getCharFromCode(char0 | char1);
this[this.mode_](packet.pts, text);
this.column_++;
// Append extended characters to caption text
} else if (this.isExtCharacter(char0, char1)) {
// Extended characters always follow their "non-extended" equivalents.
// IE if a "è" is desired, you'll always receive "eè"; non-compliant
// decoders are supposed to drop the "è", while compliant decoders
// backspace the "e" and insert "è".
// Delete the previous character
if (this.mode_ === 'popOn') {
this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);
} else {
this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);
}
// Bitmask char0 so that we can apply character transformations
// regardless of field and data channel.
// Then byte-shift to the left and OR with char1 so we can pass the
// entire character code to `getCharFromCode`.
char0 = (char0 & 0x03) << 8;
text = getCharFromCode(char0 | char1);
this[this.mode_](packet.pts, text);
this.column_++;
// Process mid-row codes
} else if (this.isMidRowCode(char0, char1)) {
// Attributes are not additive, so clear all formatting
this.clearFormatting(packet.pts);
// According to the standard, mid-row codes
// should be replaced with spaces, so add one now
this[this.mode_](packet.pts, ' ');
this.column_++;
if ((char1 & 0xe) === 0xe) {
this.addFormatting(packet.pts, ['i']);
}
if ((char1 & 0x1) === 0x1) {
this.addFormatting(packet.pts, ['u']);
}
// Detect offset control codes and adjust cursor
} else if (this.isOffsetControlCode(char0, char1)) {
// Cursor position is set by indent PAC (see below) in 4-column
// increments, with an additional offset code of 1-3 to reach any
// of the 32 columns specified by CEA-608. So all we need to do
// here is increment the column cursor by the given offset.
this.column_ += (char1 & 0x03);
// Detect PACs (Preamble Address Codes)
} else if (this.isPAC(char0, char1)) {
// There's no logic for PAC -> row mapping, so we have to just
// find the row code in an array and use its index :(
var row = ROWS.indexOf(data & 0x1f20);
// Configure the caption window if we're in roll-up mode
if (this.mode_ === 'rollUp') {
// This implies that the base row is incorrectly set.
// As per the recommendation in CEA-608(Base Row Implementation), defer to the number
// of roll-up rows set.
if (row - this.rollUpRows_ + 1 < 0) {
row = this.rollUpRows_ - 1;
}
this.setRollUp(packet.pts, row);
}
if (row !== this.row_) {
// formatting is only persistent for current row
this.clearFormatting(packet.pts);
this.row_ = row;
}
// All PACs can apply underline, so detect and apply
// (All odd-numbered second bytes set underline)
if ((char1 & 0x1) && (this.formatting_.indexOf('u') === -1)) {
this.addFormatting(packet.pts, ['u']);
}
if ((data & 0x10) === 0x10) {
// We've got an indent level code. Each successive even number
// increments the column cursor by 4, so we can get the desired
// column position by bit-shifting to the right (to get n/2)
// and multiplying by 4.
this.column_ = ((data & 0xe) >> 1) * 4;
}
if (this.isColorPAC(char1)) {
// it's a color code, though we only support white, which
// can be either normal or italicized. white italics can be
// either 0x4e or 0x6e depending on the row, so we just
// bitwise-and with 0xe to see if italics should be turned on
if ((char1 & 0xe) === 0xe) {
this.addFormatting(packet.pts, ['i']);
}
}
// We have a normal character in char0, and possibly one in char1
} else if (this.isNormalChar(char0)) {
if (char1 === 0x00) {
char1 = null;
}
text = getCharFromCode(char0);
text += getCharFromCode(char1);
this[this.mode_](packet.pts, text);
this.column_ += text.length;
} // finish data processing
};
};
Cea608Stream.prototype = new Stream();
// Trigger a cue point that captures the current state of the
// display buffer
Cea608Stream.prototype.flushDisplayed = function(pts) {
var content = this.displayed_
// remove spaces from the start and end of the string
.map(function(row) {
try {
return row.trim();
} catch (e) {
// Ordinarily, this shouldn't happen. However, caption
// parsing errors should not throw exceptions and
// break playback.
// eslint-disable-next-line no-console
console.error('Skipping malformed caption.');
return '';
}
})
// combine all text rows to display in one cue
.join('\n')
// and remove blank rows from the start and end, but not the middle
.replace(/^\n+|\n+$/g, '');
if (content.length) {
this.trigger('data', {
startPts: this.startPts_,
endPts: pts,
text: content,
stream: this.name_
});
}
};
/**
* Zero out the data, used for startup and on seek
*/
Cea608Stream.prototype.reset = function() {
this.mode_ = 'popOn';
// When in roll-up mode, the index of the last row that will
// actually display captions. If a caption is shifted to a row
// with a lower index than this, it is cleared from the display
// buffer
this.topRow_ = 0;
this.startPts_ = 0;
this.displayed_ = createDisplayBuffer();
this.nonDisplayed_ = createDisplayBuffer();
this.lastControlCode_ = null;
// Track row and column for proper line-breaking and spacing
this.column_ = 0;
this.row_ = BOTTOM_ROW;
this.rollUpRows_ = 2;
// This variable holds currently-applied formatting
this.formatting_ = [];
};
/**
* Sets up control code and related constants for this instance
*/
Cea608Stream.prototype.setConstants = function() {
// The following attributes have these uses:
// ext_ : char0 for mid-row codes, and the base for extended
// chars (ext_+0, ext_+1, and ext_+2 are char0s for
// extended codes)
// control_: char0 for control codes, except byte-shifted to the
// left so that we can do this.control_ | CONTROL_CODE
// offset_: char0 for tab offset codes
//
// It's also worth noting that control codes, and _only_ control codes,
// differ between field 1 and field2. Field 2 control codes are always
// their field 1 value plus 1. That's why there's the "| field" on the
// control value.
if (this.dataChannel_ === 0) {
this.BASE_ = 0x10;
this.EXT_ = 0x11;
this.CONTROL_ = (0x14 | this.field_) << 8;
this.OFFSET_ = 0x17;
} else if (this.dataChannel_ === 1) {
this.BASE_ = 0x18;
this.EXT_ = 0x19;
this.CONTROL_ = (0x1c | this.field_) << 8;
this.OFFSET_ = 0x1f;
}
// Constants for the LSByte command codes recognized by Cea608Stream. This
// list is not exhaustive. For a more comprehensive listing and semantics see
// http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf
// Padding
this.PADDING_ = 0x0000;
// Pop-on Mode
this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;
this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f;
// Roll-up Mode
this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;
this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;
this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;
this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d;
// paint-on mode
this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29;
// Erasure
this.BACKSPACE_ = this.CONTROL_ | 0x21;
this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;
this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;
};
/**
* Detects if the 2-byte packet data is a special character
*
* Special characters have a second byte in the range 0x30 to 0x3f,
* with the first byte being 0x11 (for data channel 1) or 0x19 (for
* data channel 2).
*
* @param {Integer} char0 The first byte
* @param {Integer} char1 The second byte
* @return {Boolean} Whether the 2 bytes are an special character
*/
Cea608Stream.prototype.isSpecialCharacter = function(char0, char1) {
return (char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f);
};
/**
* Detects if the 2-byte packet data is an extended character
*
* Extended characters have a second byte in the range 0x20 to 0x3f,
* with the first byte being 0x12 or 0x13 (for data channel 1) or
* 0x1a or 0x1b (for data channel 2).
*
* @param {Integer} char0 The first byte
* @param {Integer} char1 The second byte
* @return {Boolean} Whether the 2 bytes are an extended character
*/
Cea608Stream.prototype.isExtCharacter = function(char0, char1) {
return ((char0 === (this.EXT_ + 1) || char0 === (this.EXT_ + 2)) &&
(char1 >= 0x20 && char1 <= 0x3f));
};
/**
* Detects if the 2-byte packet is a mid-row code
*
* Mid-row codes have a second byte in the range 0x20 to 0x2f, with
* the first byte being 0x11 (for data channel 1) or 0x19 (for data
* channel 2).
*
* @param {Integer} char0 The first byte
* @param {Integer} char1 The second byte
* @return {Boolean} Whether the 2 bytes are a mid-row code
*/
Cea608Stream.prototype.isMidRowCode = function(char0, char1) {
return (char0 === this.EXT_ && (char1 >= 0x20 && char1 <= 0x2f));
};
/**
* Detects if the 2-byte packet is an offset control code
*
* Offset control codes have a second byte in the range 0x21 to 0x23,
* with the first byte being 0x17 (for data channel 1) or 0x1f (for
* data channel 2).
*
* @param {Integer} char0 The first byte
* @param {Integer} char1 The second byte
* @return {Boolean} Whether the 2 bytes are an offset control code
*/
Cea608Stream.prototype.isOffsetControlCode = function(char0, char1) {
return (char0 === this.OFFSET_ && (char1 >= 0x21 && char1 <= 0x23));
};
/**
* Detects if the 2-byte packet is a Preamble Address Code
*
* PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)
* or 0x18 to 0x1f (for data channel 2), with the second byte in the
* range 0x40 to 0x7f.
*
* @param {Integer} char0 The first byte
* @param {Integer} char1 The second byte
* @return {Boolean} Whether the 2 bytes are a PAC
*/
Cea608Stream.prototype.isPAC = function(char0, char1) {
return (char0 >= this.BASE_ && char0 < (this.BASE_ + 8) &&
(char1 >= 0x40 && char1 <= 0x7f));
};
/**
* Detects if a packet's second byte is in the range of a PAC color code
*
* PAC color codes have the second byte be in the range 0x40 to 0x4f, or
* 0x60 to 0x6f.
*
* @param {Integer} char1 The second byte
* @return {Boolean} Whether the byte is a color PAC
*/
Cea608Stream.prototype.isColorPAC = function(char1) {
return ((char1 >= 0x40 && char1 <= 0x4f) || (char1 >= 0x60 && char1 <= 0x7f));
};
/**
* Detects if a single byte is in the range of a normal character
*
* Normal text bytes are in the range 0x20 to 0x7f.
*
* @param {Integer} char The byte
* @return {Boolean} Whether the byte is a normal character
*/
Cea608Stream.prototype.isNormalChar = function(char) {
return (char >= 0x20 && char <= 0x7f);
};
/**
* Configures roll-up
*
* @param {Integer} pts Current PTS
* @param {Integer} newBaseRow Used by PACs to slide the current window to
* a new position
*/
Cea608Stream.prototype.setRollUp = function(pts, newBaseRow) {
// Reset the base row to the bottom row when switching modes
if (this.mode_ !== 'rollUp') {
this.row_ = BOTTOM_ROW;
this.mode_ = 'rollUp';
// Spec says to wipe memories when switching to roll-up
this.flushDisplayed(pts);
this.nonDisplayed_ = createDisplayBuffer();
this.displayed_ = createDisplayBuffer();
}
if (newBaseRow !== undefined && newBaseRow !== this.row_) {
// move currently displayed captions (up or down) to the new base row
for (var i = 0; i < this.rollUpRows_; i++) {
this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];
this.displayed_[this.row_ - i] = '';
}
}
if (newBaseRow === undefined) {
newBaseRow = this.row_;
}
this.topRow_ = newBaseRow - this.rollUpRows_ + 1;
};
// Adds the opening HTML tag for the passed character to the caption text,
// and keeps track of it for later closing
Cea608Stream.prototype.addFormatting = function(pts, format) {
this.formatting_ = this.formatting_.concat(format);
var text = format.reduce(function(text, format) {
return text + '<' + format + '>';
}, '');
this[this.mode_](pts, text);
};
// Adds HTML closing tags for current formatting to caption text and
// clears remembered formatting
Cea608Stream.prototype.clearFormatting = function(pts) {
if (!this.formatting_.length) {
return;
}
var text = this.formatting_.reverse().reduce(function(text, format) {
return text + '</' + format + '>';
}, '');
this.formatting_ = [];
this[this.mode_](pts, text);
};
// Mode Implementations
Cea608Stream.prototype.popOn = function(pts, text) {
var baseRow = this.nonDisplayed_[this.row_];
// buffer characters
baseRow += text;
this.nonDisplayed_[this.row_] = baseRow;
};
Cea608Stream.prototype.rollUp = function(pts, text) {
var baseRow = this.displayed_[this.row_];
baseRow += text;
this.displayed_[this.row_] = baseRow;
};
Cea608Stream.prototype.shiftRowsUp_ = function() {
var i;
// clear out inactive rows
for (i = 0; i < this.topRow_; i++) {
this.displayed_[i] = '';
}
for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {
this.displayed_[i] = '';
}
// shift displayed rows up
for (i = this.topRow_; i < this.row_; i++) {
this.displayed_[i] = this.displayed_[i + 1];
}
// clear out the bottom row
this.displayed_[this.row_] = '';
};
Cea608Stream.prototype.paintOn = function(pts, text) {
var baseRow = this.displayed_[this.row_];
baseRow += text;
this.displayed_[this.row_] = baseRow;
};
// exports
module.exports = {
CaptionStream: CaptionStream,
Cea608Stream: Cea608Stream
};

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build/javascript/node_modules/mux.js/lib/m2ts/index.js generated vendored
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/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*/
module.exports = require('./m2ts');

538
build/javascript/node_modules/mux.js/lib/m2ts/m2ts.js generated vendored
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@@ -1,538 +0,0 @@
/**
* mux.js
*
* Copyright (c) Brightcove
* Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE
*
* A stream-based mp2t 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'),
CaptionStream = require('./caption-stream'),
StreamTypes = require('./stream-types'),
TimestampRolloverStream = require('./timestamp-rollover-stream').TimestampRolloverStream;
// object types
var TransportPacketStream, TransportParseStream, ElementaryStream;
// constants
var
MP2T_PACKET_LENGTH = 188, // bytes
SYNC_BYTE = 0x47;
/**
* Splits an incoming stream of binary data into MPEG-2 Transport
* Stream packets.
*/
TransportPacketStream = function() {
var
buffer = new Uint8Array(MP2T_PACKET_LENGTH),
bytesInBuffer = 0;
TransportPacketStream.prototype.init.call(this);
// Deliver new bytes to the stream.
/**
* Split a stream of data into M2TS packets
**/
this.push = function(bytes) {
var
startIndex = 0,
endIndex = MP2T_PACKET_LENGTH,
everything;
// If there are bytes remaining from the last segment, prepend them to the
// bytes that were pushed in
if (bytesInBuffer) {
everything = new Uint8Array(bytes.byteLength + bytesInBuffer);
everything.set(buffer.subarray(0, bytesInBuffer));
everything.set(bytes, bytesInBuffer);
bytesInBuffer = 0;
} else {
everything = bytes;
}
// While we have enough data for a packet
while (endIndex < everything.byteLength) {
// Look for a pair of start and end sync bytes in the data..
if (everything[startIndex] === SYNC_BYTE && everything[endIndex] === SYNC_BYTE) {
// We found a packet so emit it and jump one whole packet forward in
// the stream
this.trigger('data', everything.subarray(startIndex, endIndex));
startIndex += MP2T_PACKET_LENGTH;
endIndex += MP2T_PACKET_LENGTH;
continue;
}
// If we get here, we have somehow become de-synchronized and we need to step
// forward one byte at a time until we find a pair of sync bytes that denote
// a packet
startIndex++;
endIndex++;
}
// If there was some data left over at the end of the segment that couldn't
// possibly be a whole packet, keep it because it might be the start of a packet
// that continues in the next segment
if (startIndex < everything.byteLength) {
buffer.set(everything.subarray(startIndex), 0);
bytesInBuffer = everything.byteLength - startIndex;
}
};
/**
* Passes identified M2TS packets to the TransportParseStream to be parsed
**/
this.flush = function() {
// If the buffer contains a whole packet when we are being flushed, emit it
// and empty the buffer. Otherwise hold onto the data because it may be
// important for decoding the next segment
if (bytesInBuffer === MP2T_PACKET_LENGTH && buffer[0] === SYNC_BYTE) {
this.trigger('data', buffer);
bytesInBuffer = 0;
}
this.trigger('done');
};
this.endTimeline = function() {
this.flush();
this.trigger('endedtimeline');
};
this.reset = function() {
bytesInBuffer = 0;
this.trigger('reset');
};
};
TransportPacketStream.prototype = new Stream();
/**
* Accepts an MP2T TransportPacketStream and emits data events with parsed
* forms of the individual transport stream packets.
*/
TransportParseStream = function() {
var parsePsi, parsePat, parsePmt, self;
TransportParseStream.prototype.init.call(this);
self = this;
this.packetsWaitingForPmt = [];
this.programMapTable = undefined;
parsePsi = function(payload, psi) {
var offset = 0;
// PSI packets may be split into multiple sections and those
// sections may be split into multiple packets. If a PSI
// section starts in this packet, the payload_unit_start_indicator
// will be true and the first byte of the payload will indicate
// the offset from the current position to the start of the
// section.
if (psi.payloadUnitStartIndicator) {
offset += payload[offset] + 1;
}
if (psi.type === 'pat') {
parsePat(payload.subarray(offset), psi);
} else {
parsePmt(payload.subarray(offset), psi);
}
};
parsePat = function(payload, pat) {
pat.section_number = payload[7]; // eslint-disable-line camelcase
pat.last_section_number = payload[8]; // eslint-disable-line camelcase
// skip the PSI header and parse the first PMT entry
self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];
pat.pmtPid = self.pmtPid;
};
/**
* Parse out the relevant fields of a Program Map Table (PMT).
* @param payload {Uint8Array} the PMT-specific portion of an MP2T
* packet. The first byte in this array should be the table_id
* field.
* @param pmt {object} the object that should be decorated with
* fields parsed from the PMT.
*/
parsePmt = function(payload, pmt) {
var sectionLength, tableEnd, programInfoLength, offset;
// 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 (!(payload[5] & 0x01)) {
return;
}
// overwrite any existing program map table
self.programMapTable = {
video: null,
audio: null,
'timed-metadata': {}
};
// the mapping table ends at the end of the current section
sectionLength = (payload[1] & 0x0f) << 8 | payload[2];
tableEnd = 3 + sectionLength - 4;
// to determine where the table is, we have to figure out how
// long the program info descriptors are
programInfoLength = (payload[10] & 0x0f) << 8 | payload[11];
// advance the offset to the first entry in the mapping table
offset = 12 + programInfoLength;
while (offset < tableEnd) {
var streamType = payload[offset];
var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2];
// only map a single elementary_pid for audio and video stream types
// TODO: should this be done for metadata too? for now maintain behavior of
// multiple metadata streams
if (streamType === StreamTypes.H264_STREAM_TYPE &&
self.programMapTable.video === null) {
self.programMapTable.video = pid;
} else if (streamType === StreamTypes.ADTS_STREAM_TYPE &&
self.programMapTable.audio === null) {
self.programMapTable.audio = pid;
} else if (streamType === StreamTypes.METADATA_STREAM_TYPE) {
// map pid to stream type for metadata streams
self.programMapTable['timed-metadata'][pid] = streamType;
}
// move to the next table entry
// skip past the elementary stream descriptors, if present
offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;
}
// record the map on the packet as well
pmt.programMapTable = self.programMapTable;
};
/**
* Deliver a new MP2T packet to the next stream in the pipeline.
*/
this.push = function(packet) {
var
result = {},
offset = 4;
result.payloadUnitStartIndicator = !!(packet[1] & 0x40);
// pid is a 13-bit field starting at the last bit of packet[1]
result.pid = packet[1] & 0x1f;
result.pid <<= 8;
result.pid |= packet[2];
// 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[offset] + 1;
}
// parse the rest of the packet based on the type
if (result.pid === 0) {
result.type = 'pat';
parsePsi(packet.subarray(offset), result);
this.trigger('data', result);
} else if (result.pid === this.pmtPid) {
result.type = 'pmt';
parsePsi(packet.subarray(offset), result);
this.trigger('data', result);
// if there are any packets waiting for a PMT to be found, process them now
while (this.packetsWaitingForPmt.length) {
this.processPes_.apply(this, this.packetsWaitingForPmt.shift());
}
} else if (this.programMapTable === undefined) {
// When we have not seen a PMT yet, defer further processing of
// PES packets until one has been parsed
this.packetsWaitingForPmt.push([packet, offset, result]);
} else {
this.processPes_(packet, offset, result);
}
};
this.processPes_ = function(packet, offset, result) {
// set the appropriate stream type
if (result.pid === this.programMapTable.video) {
result.streamType = StreamTypes.H264_STREAM_TYPE;
} else if (result.pid === this.programMapTable.audio) {
result.streamType = StreamTypes.ADTS_STREAM_TYPE;
} else {
// if not video or audio, it is timed-metadata or unknown
// if unknown, streamType will be undefined
result.streamType = this.programMapTable['timed-metadata'][result.pid];
}
result.type = 'pes';
result.data = packet.subarray(offset);
this.trigger('data', result);
};
};
TransportParseStream.prototype = new Stream();
TransportParseStream.STREAM_TYPES = {
h264: 0x1b,
adts: 0x0f
};
/**
* Reconsistutes program elementary stream (PES) packets from parsed
* transport stream packets. That is, if you pipe an
* mp2t.TransportParseStream into a mp2t.ElementaryStream, the output
* events will be events which capture the bytes for individual PES
* packets plus relevant metadata that has been extracted from the
* container.
*/
ElementaryStream = function() {
var
self = this,
// PES packet fragments
video = {
data: [],
size: 0
},
audio = {
data: [],
size: 0
},
timedMetadata = {
data: [],
size: 0
},
programMapTable,
parsePes = function(payload, pes) {
var ptsDtsFlags;
// get the packet length, this will be 0 for video
pes.packetLength = 6 + ((payload[4] << 8) | payload[5]);
// find out if this packets starts a new keyframe
pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0;
// 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 = payload[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) {
// 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 = (payload[9] & 0x0E) << 27 |
(payload[10] & 0xFF) << 20 |
(payload[11] & 0xFE) << 12 |
(payload[12] & 0xFF) << 5 |
(payload[13] & 0xFE) >>> 3;
pes.pts *= 4; // Left shift by 2
pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs
pes.dts = pes.pts;
if (ptsDtsFlags & 0x40) {
pes.dts = (payload[14] & 0x0E) << 27 |
(payload[15] & 0xFF) << 20 |
(payload[16] & 0xFE) << 12 |
(payload[17] & 0xFF) << 5 |
(payload[18] & 0xFE) >>> 3;
pes.dts *= 4; // Left shift by 2
pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs
}
}
// the data section starts immediately after the PES header.
// pes_header_data_length specifies the number of header bytes
// that follow the last byte of the field.
pes.data = payload.subarray(9 + payload[8]);
},
/**
* Pass completely parsed PES packets to the next stream in the pipeline
**/
flushStream = function(stream, type, forceFlush) {
var
packetData = new Uint8Array(stream.size),
event = {
type: type
},
i = 0,
offset = 0,
packetFlushable = false,
fragment;
// do nothing if there is not enough buffered data for a complete
// PES header
if (!stream.data.length || stream.size < 9) {
return;
}
event.trackId = stream.data[0].pid;
// reassemble the packet
for (i = 0; i < stream.data.length; i++) {
fragment = stream.data[i];
packetData.set(fragment.data, offset);
offset += fragment.data.byteLength;
}
// parse assembled packet's PES header
parsePes(packetData, event);
// non-video PES packets MUST have a non-zero PES_packet_length
// check that there is enough stream data to fill the packet
packetFlushable = type === 'video' || event.packetLength <= stream.size;
// flush pending packets if the conditions are right
if (forceFlush || packetFlushable) {
stream.size = 0;
stream.data.length = 0;
}
// only emit packets that are complete. this is to avoid assembling
// incomplete PES packets due to poor segmentation
if (packetFlushable) {
self.trigger('data', event);
}
};
ElementaryStream.prototype.init.call(this);
/**
* Identifies M2TS packet types and parses PES packets using metadata
* parsed from the PMT
**/
this.push = function(data) {
({
pat: function() {
// we have to wait for the PMT to arrive as well before we
// have any meaningful metadata
},
pes: function() {
var stream, streamType;
switch (data.streamType) {
case StreamTypes.H264_STREAM_TYPE:
stream = video;
streamType = 'video';
break;
case StreamTypes.ADTS_STREAM_TYPE:
stream = audio;
streamType = 'audio';
break;
case StreamTypes.METADATA_STREAM_TYPE:
stream = timedMetadata;
streamType = 'timed-metadata';
break;
default:
// ignore unknown stream types
return;
}
// if a new packet is starting, we can flush the completed
// packet
if (data.payloadUnitStartIndicator) {
flushStream(stream, streamType, true);
}
// buffer this fragment until we are sure we've received the
// complete payload
stream.data.push(data);
stream.size += data.data.byteLength;
},
pmt: function() {
var
event = {
type: 'metadata',
tracks: []
};
programMapTable = data.programMapTable;
// translate audio and video streams to tracks
if (programMapTable.video !== null) {
event.tracks.push({
timelineStartInfo: {
baseMediaDecodeTime: 0
},
id: +programMapTable.video,
codec: 'avc',
type: 'video'
});
}
if (programMapTable.audio !== null) {
event.tracks.push({
timelineStartInfo: {
baseMediaDecodeTime: 0
},
id: +programMapTable.audio,
codec: 'adts',
type: 'audio'
});
}
self.trigger('data', event);
}
})[data.type]();
};
this.reset = function() {
video.size = 0;
video.data.length = 0;
audio.size = 0;
audio.data.length = 0;
this.trigger('reset');
};
/**
* Flush any remaining input. Video PES packets may be of variable
* length. Normally, the start of a new video packet can trigger the
* finalization of the previous packet. That is not possible if no
* more video is forthcoming, however. In that case, some other
* mechanism (like the end of the file) has to be employed. When it is
* clear that no additional data is forthcoming, calling this method
* will flush the buffered packets.
*/
this.flushStreams_ = function() {
// !!THIS ORDER IS IMPORTANT!!
// video first then audio
flushStream(video, 'video');
flushStream(audio, 'audio');
flushStream(timedMetadata, 'timed-metadata');
};
this.flush = function() {
this.flushStreams_();
this.trigger('done');
};
};
ElementaryStream.prototype = new Stream();
var m2ts = {
PAT_PID: 0x0000,
MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH,
TransportPacketStream: TransportPacketStream,
TransportParseStream: TransportParseStream,
ElementaryStream: ElementaryStream,
TimestampRolloverStream: TimestampRolloverStream,
CaptionStream: CaptionStream.CaptionStream,
Cea608Stream: CaptionStream.Cea608Stream,
MetadataStream: require('./metadata-stream')
};
for (var type in StreamTypes) {
if (StreamTypes.hasOwnProperty(type)) {
m2ts[type] = StreamTypes[type];
}
}
module.exports = m2ts;

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build/javascript/node_modules/mux.js/lib/m2ts/metadata-stream.js generated vendored
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/**
* 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(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(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(bytes, start, end) {
return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
},
parseSyncSafeInteger = function(data) {
return (data[0] << 21) |
(data[1] << 14) |
(data[2] << 7) |
(data[3]);
},
tagParsers = {
TXXX: function(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(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(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(options) {
var
settings = {
debug: !!(options && options.debug),
// 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))) {
if (settings.debug) {
// eslint-disable-next-line no-console
console.log('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) {
// eslint-disable-next-line no-console
return console.log('Malformed ID3 frame encountered. Skipping metadata parsing.');
}
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;

287
build/javascript/node_modules/mux.js/lib/m2ts/probe.js generated vendored
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@@ -1,287 +0,0 @@
/**
* 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(packet) {
var pid = packet[1] & 0x1f;
pid <<= 8;
pid |= packet[2];
return pid;
};
var parsePayloadUnitStartIndicator = function(packet) {
return !!(packet[1] & 0x40);
};
var parseAdaptionField = function(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(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(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(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(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(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(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(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
};

13
build/javascript/node_modules/mux.js/lib/m2ts/stream-types.js generated vendored
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/**
* 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
};

101
build/javascript/node_modules/mux.js/lib/m2ts/timestamp-rollover-stream.js generated vendored
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/**
* 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(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(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
};