public/lib/modules/aurora.js/mp3.js
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
exports.MP3Demuxer = require('./src/demuxer');
exports.MP3Decoder = require('./src/decoder');
},{"./src/decoder":2,"./src/demuxer":3}],2:[function(require,module,exports){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
var MP3FrameHeader = require('./header');
var MP3Stream = require('./stream');
var MP3Frame = require('./frame');
var MP3Synth = require('./synth');
var Layer1 = require('./layer1');
var Layer2 = require('./layer2');
var Layer3 = require('./layer3');
var MP3Decoder = AV.Decoder.extend(function() {
AV.Decoder.register('mp3', this);
this.prototype.init = function() {
this.mp3_stream = new MP3Stream(this.bitstream);
this.frame = new MP3Frame();
this.synth = new MP3Synth();
this.seeking = false;
};
this.prototype.readChunk = function() {
var stream = this.mp3_stream;
var frame = this.frame;
var synth = this.synth;
// if we just seeked, we may start getting errors involving the frame reservoir,
// so keep going until we successfully decode a frame
if (this.seeking) {
while (true) {
try {
frame.decode(stream);
break;
} catch (err) {
if (err instanceof AV.UnderflowError)
throw err;
}
}
this.seeking = false;
} else {
frame.decode(stream);
}
synth.frame(frame);
// interleave samples
var data = synth.pcm.samples,
channels = synth.pcm.channels,
len = synth.pcm.length,
output = new Float32Array(len * channels),
j = 0;
for (var k = 0; k < len; k++) {
for (var i = 0; i < channels; i++) {
output[j++] = data[i][k];
}
}
return output;
};
this.prototype.seek = function(timestamp) {
var offset;
// if there was a Xing or VBRI tag with a seek table, use that
// otherwise guesstimate based on CBR bitrate
if (this.demuxer.seekPoints.length > 0) {
timestamp = this._super(timestamp);
offset = this.stream.offset;
} else {
offset = timestamp * this.format.bitrate / 8 / this.format.sampleRate;
}
this.mp3_stream.reset(offset);
// try to find 3 consecutive valid frame headers in a row
for (var i = 0; i < 4096; i++) {
var pos = offset + i;
for (var j = 0; j < 3; j++) {
this.mp3_stream.reset(pos);
try {
var header = MP3FrameHeader.decode(this.mp3_stream);
} catch (e) {
break;
}
// skip the rest of the frame
var size = header.framesize();
if (size == null)
break;
pos += size;
}
// check if we're done
if (j === 3)
break;
}
// if we didn't find 3 frames, just try the first one and hope for the best
if (j !== 3)
i = 0;
this.mp3_stream.reset(offset + i);
// if we guesstimated, update the timestamp to another estimate of where we actually seeked to
if (this.demuxer.seekPoints.length === 0)
timestamp = this.stream.offset / (this.format.bitrate / 8) * this.format.sampleRate;
this.seeking = true;
return timestamp;
};
});
module.exports = MP3Decoder;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./frame":4,"./header":5,"./layer1":9,"./layer2":10,"./layer3":11,"./stream":12,"./synth":13}],3:[function(require,module,exports){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
var ID3v23Stream = require('./id3').ID3v23Stream;
var ID3v22Stream = require('./id3').ID3v22Stream;
var MP3FrameHeader = require('./header');
var MP3Stream = require('./stream');
var MP3Demuxer = AV.Demuxer.extend(function() {
AV.Demuxer.register(this);
this.probe = function(stream) {
var off = stream.offset;
// skip id3 metadata if it exists
var id3header = MP3Demuxer.getID3v2Header(stream);
if (id3header)
stream.advance(10 + id3header.length);
// attempt to read the header of the first audio frame
var s = new MP3Stream(new AV.Bitstream(stream));
var header = null;
try {
header = MP3FrameHeader.decode(s);
} catch (e) {};
// go back to the beginning, for other probes
stream.seek(off);
return !!header;
};
this.getID3v2Header = function(stream) {
if (stream.peekString(0, 3) == 'ID3') {
stream = AV.Stream.fromBuffer(stream.peekBuffer(0, 10));
stream.advance(3); // 'ID3'
var major = stream.readUInt8();
var minor = stream.readUInt8();
var flags = stream.readUInt8();
var bytes = stream.readBuffer(4).data;
var length = (bytes[0] << 21) | (bytes[1] << 14) | (bytes[2] << 7) | bytes[3];
return {
version: '2.' + major + '.' + minor,
major: major,
minor: minor,
flags: flags,
length: length
};
}
return null;
};
const XING_OFFSETS = [[32, 17], [17, 9]];
this.prototype.parseDuration = function(header, off) {
var stream = this.stream;
var frames;
if (this.metadata) {
var mllt = this.metadata.MPEGLocationLookupTable;
if (mllt) {
var bitstream = new AV.Bitstream(AV.Stream.fromBuffer(mllt.data));
var refSize = mllt.bitsForBytesDeviation + mllt.bitsForMillisecondsDev;
var samples = 0;
var bytes = 0;
while (bitstream.available(refSize)) {
this.addSeekPoint(bytes, samples);
var bytesDev = bitstream.read(mllt.bitsForBytesDeviation);
bitstream.advance(mllt.bitsForMillisecondsDev); // skip millisecond deviation
bytes += mllt.bytesBetweenReference + bytesDev;
samples += mllt.framesBetweenReference * header.nbsamples() * 32;
}
this.addSeekPoint(bytes, samples);
}
if (this.metadata.length) {
this.emit('duration', parseInt(this.metadata.length, 10));
return true;
}
}
var offset = stream.offset;
if (!header || header.layer !== 3)
return false;
// Check for Xing/Info tag
stream.advance(XING_OFFSETS[header.flags & MP3FrameHeader.FLAGS.LSF_EXT ? 1 : 0][header.nchannels() === 1 ? 1 : 0]);
var tag = stream.readString(4);
if (tag === 'Xing' || tag === 'Info') {
var flags = stream.readUInt32();
if (flags & 1)
frames = stream.readUInt32();
if (flags & 2)
var size = stream.readUInt32();
if (flags & 4 && frames && size && this.seekPoints.length === 0) {
for (var i = 0; i < 100; i++) {
var b = stream.readUInt8();
var pos = b / 256 * size | 0;
var time = i / 100 * (frames * header.nbsamples() * 32) | 0;
this.addSeekPoint(pos, time);
}
}
if (flags & 8)
stream.advance(4);
} else {
// Check for VBRI tag (always 32 bytes after end of mpegaudio header)
stream.seek(off + 4 + 32);
tag = stream.readString(4);
if (tag == 'VBRI' && stream.readUInt16() === 1) { // Check tag version
stream.advance(4); // skip delay and quality
stream.advance(4); // skip size
frames = stream.readUInt32();
if (this.seekPoints.length === 0) {
var entries = stream.readUInt16();
var scale = stream.readUInt16();
var bytesPerEntry = stream.readUInt16();
var framesPerEntry = stream.readUInt16();
var fn = 'readUInt' + (bytesPerEntry * 8);
var pos = 0;
for (var i = 0; i < entries; i++) {
this.addSeekPoint(pos, i * framesPerEntry * header.nbsamples() * 32 | 0);
pos += stream[fn]() * scale;
}
}
}
}
if (!frames)
return false;
this.emit('duration', (frames * header.nbsamples() * 32) / header.samplerate * 1000 | 0);
return true;
};
this.prototype.readChunk = function() {
var stream = this.stream;
if (!this.sentInfo) {
// read id3 metadata if it exists
var id3header = MP3Demuxer.getID3v2Header(stream);
if (id3header && !this.metadata) {
stream.advance(10);
if (id3header.major > 2) {
var id3 = new ID3v23Stream(id3header, stream);
} else {
var id3 = new ID3v22Stream(id3header, stream);
}
this.metadata = id3.read();
this.emit('metadata', this.metadata);
stream.seek(10 + id3header.length);
}
// read the header of the first audio frame
var off = stream.offset;
var s = new MP3Stream(new AV.Bitstream(stream));
var header = MP3FrameHeader.decode(s);
if (!header)
return this.emit('error', 'Could not find first frame.');
this.emit('format', {
formatID: 'mp3',
sampleRate: header.samplerate,
channelsPerFrame: header.nchannels(),
bitrate: header.bitrate,
floatingPoint: true,
layer: header.layer,
flags: header.flags
});
var sentDuration = this.parseDuration(header, off);
stream.advance(off - stream.offset);
// if there were no Xing/VBRI tags, guesstimate the duration based on data size and bitrate
this.dataSize = 0;
if (!sentDuration) {
this.on('end', function() {
this.emit('duration', this.dataSize * 8 / header.bitrate * 1000 | 0);
});
}
this.sentInfo = true;
}
while (stream.available(1)) {
var buffer = stream.readSingleBuffer(stream.remainingBytes());
this.dataSize += buffer.length;
this.emit('data', buffer);
}
};
});
module.exports = MP3Demuxer;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./header":5,"./id3":7,"./stream":12}],4:[function(require,module,exports){
var MP3FrameHeader = require('./header');
var utils = require('./utils');
function MP3Frame() {
this.header = null; // MPEG audio header
this.options = 0; // decoding options (from stream)
this.sbsample = utils.makeArray([2, 36, 32]); // synthesis subband filter samples
this.overlap = utils.makeArray([2, 32, 18]); // Layer III block overlap data
this.decoders = [];
}
// included layer decoders are registered here
MP3Frame.layers = [];
MP3Frame.prototype.decode = function(stream) {
if (!this.header || !(this.header.flags & MP3FrameHeader.FLAGS.INCOMPLETE))
this.header = MP3FrameHeader.decode(stream);
this.header.flags &= ~MP3FrameHeader.FLAGS.INCOMPLETE;
// make an instance of the decoder for this layer if needed
var decoder = this.decoders[this.header.layer - 1];
if (!decoder) {
var Layer = MP3Frame.layers[this.header.layer];
if (!Layer)
throw new Error("Layer " + this.header.layer + " is not supported.");
decoder = this.decoders[this.header.layer - 1] = new Layer();
}
decoder.decode(stream, this);
};
module.exports = MP3Frame;
},{"./header":5,"./utils":15}],5:[function(require,module,exports){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
function MP3FrameHeader() {
this.layer = 0; // audio layer (1, 2, or 3)
this.mode = 0; // channel mode (see above)
this.mode_extension = 0; // additional mode info
this.emphasis = 0; // de-emphasis to use (see above)
this.bitrate = 0; // stream bitrate (bps)
this.samplerate = 0; // sampling frequency (Hz)
this.crc_check = 0; // frame CRC accumulator
this.crc_target = 0; // final target CRC checksum
this.flags = 0; // flags (see above)
this.private_bits = 0; // private bits
}
const BITRATES = [
// MPEG-1
[ 0, 32000, 64000, 96000, 128000, 160000, 192000, 224000, // Layer I
256000, 288000, 320000, 352000, 384000, 416000, 448000 ],
[ 0, 32000, 48000, 56000, 64000, 80000, 96000, 112000, // Layer II
128000, 160000, 192000, 224000, 256000, 320000, 384000 ],
[ 0, 32000, 40000, 48000, 56000, 64000, 80000, 96000, // Layer III
112000, 128000, 160000, 192000, 224000, 256000, 320000 ],
// MPEG-2 LSF
[ 0, 32000, 48000, 56000, 64000, 80000, 96000, 112000, // Layer I
128000, 144000, 160000, 176000, 192000, 224000, 256000 ],
[ 0, 8000, 16000, 24000, 32000, 40000, 48000, 56000, // Layers
64000, 80000, 96000, 112000, 128000, 144000, 160000 ] // II & III
];
const SAMPLERATES = [
44100, 48000, 32000
];
MP3FrameHeader.FLAGS = {
NPRIVATE_III: 0x0007, // number of Layer III private bits
INCOMPLETE : 0x0008, // header but not data is decoded
PROTECTION : 0x0010, // frame has CRC protection
COPYRIGHT : 0x0020, // frame is copyright
ORIGINAL : 0x0040, // frame is original (else copy)
PADDING : 0x0080, // frame has additional slot
I_STEREO : 0x0100, // uses intensity joint stereo
MS_STEREO : 0x0200, // uses middle/side joint stereo
FREEFORMAT : 0x0400, // uses free format bitrate
LSF_EXT : 0x1000, // lower sampling freq. extension
MC_EXT : 0x2000, // multichannel audio extension
MPEG_2_5_EXT: 0x4000 // MPEG 2.5 (unofficial) extension
};
const PRIVATE = {
HEADER : 0x0100, // header private bit
III : 0x001f // Layer III private bits (up to 5)
};
MP3FrameHeader.MODE = {
SINGLE_CHANNEL: 0, // single channel
DUAL_CHANNEL : 1, // dual channel
JOINT_STEREO : 2, // joint (MS/intensity) stereo
STEREO : 3 // normal LR stereo
};
const EMPHASIS = {
NONE : 0, // no emphasis
_50_15_US : 1, // 50/15 microseconds emphasis
CCITT_J_17: 3, // CCITT J.17 emphasis
RESERVED : 2 // unknown emphasis
};
MP3FrameHeader.BUFFER_GUARD = 8;
MP3FrameHeader.BUFFER_MDLEN = (511 + 2048 + MP3FrameHeader.BUFFER_GUARD);
MP3FrameHeader.prototype.copy = function() {
var clone = new MP3FrameHeader();
var keys = Object.keys(this);
for (var key in keys) {
clone[key] = this[key];
}
return clone;
}
MP3FrameHeader.prototype.nchannels = function () {
return this.mode === 0 ? 1 : 2;
};
MP3FrameHeader.prototype.nbsamples = function() {
return (this.layer === 1 ? 12 : ((this.layer === 3 && (this.flags & MP3FrameHeader.FLAGS.LSF_EXT)) ? 18 : 36));
};
MP3FrameHeader.prototype.framesize = function() {
if (this.bitrate === 0)
return null;
var padding = (this.flags & MP3FrameHeader.FLAGS.PADDING ? 1 : 0);
switch (this.layer) {
case 1:
var size = (this.bitrate * 12) / this.samplerate | 0;
return (size + padding) * 4;
case 2:
var size = (this.bitrate * 144) / this.samplerate | 0;
return size + padding;
case 3:
default:
var lsf = this.flags & MP3FrameHeader.FLAGS.LSF_EXT ? 1 : 0;
var size = (this.bitrate * 144) / (this.samplerate << lsf) | 0;
return size + padding;
}
};
MP3FrameHeader.prototype.decode = function(stream) {
this.flags = 0;
this.private_bits = 0;
// syncword
stream.advance(11);
// MPEG 2.5 indicator (really part of syncword)
if (stream.read(1) === 0)
this.flags |= MP3FrameHeader.FLAGS.MPEG_2_5_EXT;
// ID
if (stream.read(1) === 0) {
this.flags |= MP3FrameHeader.FLAGS.LSF_EXT;
} else if (this.flags & MP3FrameHeader.FLAGS.MPEG_2_5_EXT) {
throw new AV.UnderflowError(); // LOSTSYNC
}
// layer
this.layer = 4 - stream.read(2);
if (this.layer === 4)
throw new Error('Invalid layer');
// protection_bit
if (stream.read(1) === 0)
this.flags |= MP3FrameHeader.FLAGS.PROTECTION;
// bitrate_index
var index = stream.read(4);
if (index === 15)
throw new Error('Invalid bitrate');
if (this.flags & MP3FrameHeader.FLAGS.LSF_EXT) {
this.bitrate = BITRATES[3 + (this.layer >> 1)][index];
} else {
this.bitrate = BITRATES[this.layer - 1][index];
}
// sampling_frequency
index = stream.read(2);
if (index === 3)
throw new Error('Invalid sampling frequency');
this.samplerate = SAMPLERATES[index];
if (this.flags & MP3FrameHeader.FLAGS.LSF_EXT) {
this.samplerate /= 2;
if (this.flags & MP3FrameHeader.FLAGS.MPEG_2_5_EXT)
this.samplerate /= 2;
}
// padding_bit
if (stream.read(1))
this.flags |= MP3FrameHeader.FLAGS.PADDING;
// private_bit
if (stream.read(1))
this.private_bits |= PRIVATE.HEADER;
// mode
this.mode = 3 - stream.read(2);
// mode_extension
this.mode_extension = stream.read(2);
// copyright
if (stream.read(1))
this.flags |= MP3FrameHeader.FLAGS.COPYRIGHT;
// original/copy
if (stream.read(1))
this.flags |= MP3FrameHeader.FLAGS.ORIGINAL;
// emphasis
this.emphasis = stream.read(2);
// crc_check
if (this.flags & MP3FrameHeader.FLAGS.PROTECTION)
this.crc_target = stream.read(16);
};
MP3FrameHeader.decode = function(stream) {
// synchronize
var ptr = stream.next_frame;
var syncing = true;
var header = null;
while (syncing) {
syncing = false;
if (stream.sync) {
if (!stream.available(MP3FrameHeader.BUFFER_GUARD)) {
stream.next_frame = ptr;
throw new AV.UnderflowError();
} else if (!(stream.getU8(ptr) === 0xff && (stream.getU8(ptr + 1) & 0xe0) === 0xe0)) {
// mark point where frame sync word was expected
stream.this_frame = ptr;
stream.next_frame = ptr + 1;
throw new AV.UnderflowError(); // LOSTSYNC
}
} else {
stream.seek(ptr * 8);
if (!stream.doSync())
throw new AV.UnderflowError();
ptr = stream.nextByte();
}
// begin processing
stream.this_frame = ptr;
stream.next_frame = ptr + 1; // possibly bogus sync word
stream.seek(stream.this_frame * 8);
header = new MP3FrameHeader();
header.decode(stream);
if (header.bitrate === 0) {
if (stream.freerate === 0 || !stream.sync || (header.layer === 3 && stream.freerate > 640000))
MP3FrameHeader.free_bitrate(stream, header);
header.bitrate = stream.freerate;
header.flags |= MP3FrameHeader.FLAGS.FREEFORMAT;
}
// calculate beginning of next frame
var pad_slot = (header.flags & MP3FrameHeader.FLAGS.PADDING) ? 1 : 0;
if (header.layer === 1) {
var N = (((12 * header.bitrate / header.samplerate) << 0) + pad_slot) * 4;
} else {
var slots_per_frame = (header.layer === 3 && (header.flags & MP3FrameHeader.FLAGS.LSF_EXT)) ? 72 : 144;
var N = ((slots_per_frame * header.bitrate / header.samplerate) << 0) + pad_slot;
}
// verify there is enough data left in buffer to decode this frame
if (!stream.available(N + MP3FrameHeader.BUFFER_GUARD)) {
stream.next_frame = stream.this_frame;
throw new AV.UnderflowError();
}
stream.next_frame = stream.this_frame + N;
if (!stream.sync) {
// check that a valid frame header follows this frame
ptr = stream.next_frame;
if (!(stream.getU8(ptr) === 0xff && (stream.getU8(ptr + 1) & 0xe0) === 0xe0)) {
ptr = stream.next_frame = stream.this_frame + 1;
// emulating 'goto sync'
syncing = true;
continue;
}
stream.sync = true;
}
}
header.flags |= MP3FrameHeader.FLAGS.INCOMPLETE;
return header;
};
MP3FrameHeader.free_bitrate = function(stream, header) {
var pad_slot = header.flags & MP3FrameHeader.FLAGS.PADDING ? 1 : 0,
slots_per_frame = header.layer === 3 && header.flags & MP3FrameHeader.FLAGS.LSF_EXT ? 72 : 144;
var start = stream.offset();
var rate = 0;
while (stream.doSync()) {
var peek_header = header.copy();
var peek_stream = stream.copy();
if (peek_header.decode(peek_stream) && peek_header.layer === header.layer && peek_header.samplerate === header.samplerate) {
var N = stream.nextByte() - stream.this_frame;
if (header.layer === 1) {
rate = header.samplerate * (N - 4 * pad_slot + 4) / 48 / 1000 | 0;
} else {
rate = header.samplerate * (N - pad_slot + 1) / slots_per_frame / 1000 | 0;
}
if (rate >= 8)
break;
}
stream.advance(8);
}
stream.seek(start);
if (rate < 8 || (header.layer === 3 && rate > 640))
throw new AV.UnderflowError(); // LOSTSYNC
stream.freerate = rate * 1000;
};
module.exports = MP3FrameHeader;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],6:[function(require,module,exports){
/*
* These are the Huffman code words for Layer III.
* The data for these tables are derived from Table B.7 of ISO/IEC 11172-3.
*
* These tables support decoding up to 4 Huffman code bits at a time.
*/
var PTR = function(offs, bits) {
return {
final: 0,
ptr: {
bits: bits,
offset: offs
}
};
};
var huffquad_V = function (v, w, x, y, hlen) {
return {
final: 1,
value: {
v: v,
w: w,
x: x,
y: y,
hlen: hlen
}
};
};
const hufftabA = [
/* 0000 */ PTR(16, 2),
/* 0001 */ PTR(20, 2),
/* 0010 */ PTR(24, 1),
/* 0011 */ PTR(26, 1),
/* 0100 */ huffquad_V(0, 0, 1, 0, 4),
/* 0101 */ huffquad_V(0, 0, 0, 1, 4),
/* 0110 */ huffquad_V(0, 1, 0, 0, 4),
/* 0111 */ huffquad_V(1, 0, 0, 0, 4),
/* 1000 */ huffquad_V(0, 0, 0, 0, 1),
/* 1001 */ huffquad_V(0, 0, 0, 0, 1),
/* 1010 */ huffquad_V(0, 0, 0, 0, 1),
/* 1011 */ huffquad_V(0, 0, 0, 0, 1),
/* 1100 */ huffquad_V(0, 0, 0, 0, 1),
/* 1101 */ huffquad_V(0, 0, 0, 0, 1),
/* 1110 */ huffquad_V(0, 0, 0, 0, 1),
/* 1111 */ huffquad_V(0, 0, 0, 0, 1),
/* 0000 ... */
/* 00 */ huffquad_V(1, 0, 1, 1, 2), /* 16 */
/* 01 */ huffquad_V(1, 1, 1, 1, 2),
/* 10 */ huffquad_V(1, 1, 0, 1, 2),
/* 11 */ huffquad_V(1, 1, 1, 0, 2),
/* 0001 ... */
/* 00 */ huffquad_V(0, 1, 1, 1, 2), /* 20 */
/* 01 */ huffquad_V(0, 1, 0, 1, 2),
/* 10 */ huffquad_V(1, 0, 0, 1, 1),
/* 11 */ huffquad_V(1, 0, 0, 1, 1),
/* 0010 ... */
/* 0 */ huffquad_V(0, 1, 1, 0, 1), /* 24 */
/* 1 */ huffquad_V(0, 0, 1, 1, 1),
/* 0011 ... */
/* 0 */ huffquad_V(1, 0, 1, 0, 1), /* 26 */
/* 1 */ huffquad_V(1, 1, 0, 0, 1)
];
const hufftabB = [
/* 0000 */ huffquad_V(1, 1, 1, 1, 4),
/* 0001 */ huffquad_V(1, 1, 1, 0, 4),
/* 0010 */ huffquad_V(1, 1, 0, 1, 4),
/* 0011 */ huffquad_V(1, 1, 0, 0, 4),
/* 0100 */ huffquad_V(1, 0, 1, 1, 4),
/* 0101 */ huffquad_V(1, 0, 1, 0, 4),
/* 0110 */ huffquad_V(1, 0, 0, 1, 4),
/* 0111 */ huffquad_V(1, 0, 0, 0, 4),
/* 1000 */ huffquad_V(0, 1, 1, 1, 4),
/* 1001 */ huffquad_V(0, 1, 1, 0, 4),
/* 1010 */ huffquad_V(0, 1, 0, 1, 4),
/* 1011 */ huffquad_V(0, 1, 0, 0, 4),
/* 1100 */ huffquad_V(0, 0, 1, 1, 4),
/* 1101 */ huffquad_V(0, 0, 1, 0, 4),
/* 1110 */ huffquad_V(0, 0, 0, 1, 4),
/* 1111 */ huffquad_V(0, 0, 0, 0, 4)
];
var V = function (x, y, hlen) {
return {
final: 1,
value: {
x: x,
y: y,
hlen: hlen
}
};
};
const hufftab0 = [
/* */ V(0, 0, 0)
];
const hufftab1 = [
/* 000 */ V(1, 1, 3),
/* 001 */ V(0, 1, 3),
/* 010 */ V(1, 0, 2),
/* 011 */ V(1, 0, 2),
/* 100 */ V(0, 0, 1),
/* 101 */ V(0, 0, 1),
/* 110 */ V(0, 0, 1),
/* 111 */ V(0, 0, 1)
];
const hufftab2 = [
/* 000 */ PTR(8, 3),
/* 001 */ V(1, 1, 3),
/* 010 */ V(0, 1, 3),
/* 011 */ V(1, 0, 3),
/* 100 */ V(0, 0, 1),
/* 101 */ V(0, 0, 1),
/* 110 */ V(0, 0, 1),
/* 111 */ V(0, 0, 1),
/* 000 ... */
/* 000 */ V(2, 2, 3), /* 8 */
/* 001 */ V(0, 2, 3),
/* 010 */ V(1, 2, 2),
/* 011 */ V(1, 2, 2),
/* 100 */ V(2, 1, 2),
/* 101 */ V(2, 1, 2),
/* 110 */ V(2, 0, 2),
/* 111 */ V(2, 0, 2)
];
const hufftab3 = [
/* 000 */ PTR(8, 3),
/* 001 */ V(1, 0, 3),
/* 010 */ V(1, 1, 2),
/* 011 */ V(1, 1, 2),
/* 100 */ V(0, 1, 2),
/* 101 */ V(0, 1, 2),
/* 110 */ V(0, 0, 2),
/* 111 */ V(0, 0, 2),
/* 000 ... */
/* 000 */ V(2, 2, 3), /* 8 */
/* 001 */ V(0, 2, 3),
/* 010 */ V(1, 2, 2),
/* 011 */ V(1, 2, 2),
/* 100 */ V(2, 1, 2),
/* 101 */ V(2, 1, 2),
/* 110 */ V(2, 0, 2),
/* 111 */ V(2, 0, 2)
];
const hufftab5 = [
/* 000 */ PTR(8, 4),
/* 001 */ V(1, 1, 3),
/* 010 */ V(0, 1, 3),
/* 011 */ V(1, 0, 3),
/* 100 */ V(0, 0, 1),
/* 101 */ V(0, 0, 1),
/* 110 */ V(0, 0, 1),
/* 111 */ V(0, 0, 1),
/* 000 ... */
/* 0000 */ PTR(24, 1), /* 8 */
/* 0001 */ V(3, 2, 4),
/* 0010 */ V(3, 1, 3),
/* 0011 */ V(3, 1, 3),
/* 0100 */ V(1, 3, 4),
/* 0101 */ V(0, 3, 4),
/* 0110 */ V(3, 0, 4),
/* 0111 */ V(2, 2, 4),
/* 1000 */ V(1, 2, 3),
/* 1001 */ V(1, 2, 3),
/* 1010 */ V(2, 1, 3),
/* 1011 */ V(2, 1, 3),
/* 1100 */ V(0, 2, 3),
/* 1101 */ V(0, 2, 3),
/* 1110 */ V(2, 0, 3),
/* 1111 */ V(2, 0, 3),
/* 000 0000 ... */
/* 0 */ V(3, 3, 1), /* 24 */
/* 1 */ V(2, 3, 1)
];
const hufftab6 = [
/* 0000 */ PTR(16, 3),
/* 0001 */ PTR(24, 1),
/* 0010 */ PTR(26, 1),
/* 0011 */ V(1, 2, 4),
/* 0100 */ V(2, 1, 4),
/* 0101 */ V(2, 0, 4),
/* 0110 */ V(0, 1, 3),
/* 0111 */ V(0, 1, 3),
/* 1000 */ V(1, 1, 2),
/* 1001 */ V(1, 1, 2),
/* 1010 */ V(1, 1, 2),
/* 1011 */ V(1, 1, 2),
/* 1100 */ V(1, 0, 3),
/* 1101 */ V(1, 0, 3),
/* 1110 */ V(0, 0, 3),
/* 1111 */ V(0, 0, 3),
/* 0000 ... */
/* 000 */ V(3, 3, 3), /* 16 */
/* 001 */ V(0, 3, 3),
/* 010 */ V(2, 3, 2),
/* 011 */ V(2, 3, 2),
/* 100 */ V(3, 2, 2),
/* 101 */ V(3, 2, 2),
/* 110 */ V(3, 0, 2),
/* 111 */ V(3, 0, 2),
/* 0001 ... */
/* 0 */ V(1, 3, 1), /* 24 */
/* 1 */ V(3, 1, 1),
/* 0010 ... */
/* 0 */ V(2, 2, 1), /* 26 */
/* 1 */ V(0, 2, 1)
];
const hufftab7 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 2),
/* 0011 */ V(1, 1, 4),
/* 0100 */ V(0, 1, 3),
/* 0101 */ V(0, 1, 3),
/* 0110 */ V(1, 0, 3),
/* 0111 */ V(1, 0, 3),
/* 1000 */ V(0, 0, 1),
/* 1001 */ V(0, 0, 1),
/* 1010 */ V(0, 0, 1),
/* 1011 */ V(0, 0, 1),
/* 1100 */ V(0, 0, 1),
/* 1101 */ V(0, 0, 1),
/* 1110 */ V(0, 0, 1),
/* 1111 */ V(0, 0, 1),
/* 0000 ... */
/* 0000 */ PTR(52, 2), /* 16 */
/* 0001 */ PTR(56, 1),
/* 0010 */ PTR(58, 1),
/* 0011 */ V(1, 5, 4),
/* 0100 */ V(5, 1, 4),
/* 0101 */ PTR(60, 1),
/* 0110 */ V(5, 0, 4),
/* 0111 */ PTR(62, 1),
/* 1000 */ V(2, 4, 4),
/* 1001 */ V(4, 2, 4),
/* 1010 */ V(1, 4, 3),
/* 1011 */ V(1, 4, 3),
/* 1100 */ V(4, 1, 3),
/* 1101 */ V(4, 1, 3),
/* 1110 */ V(4, 0, 3),
/* 1111 */ V(4, 0, 3),
/* 0001 ... */
/* 0000 */ V(0, 4, 4), /* 32 */
/* 0001 */ V(2, 3, 4),
/* 0010 */ V(3, 2, 4),
/* 0011 */ V(0, 3, 4),
/* 0100 */ V(1, 3, 3),
/* 0101 */ V(1, 3, 3),
/* 0110 */ V(3, 1, 3),
/* 0111 */ V(3, 1, 3),
/* 1000 */ V(3, 0, 3),
/* 1001 */ V(3, 0, 3),
/* 1010 */ V(2, 2, 3),
/* 1011 */ V(2, 2, 3),
/* 1100 */ V(1, 2, 2),
/* 1101 */ V(1, 2, 2),
/* 1110 */ V(1, 2, 2),
/* 1111 */ V(1, 2, 2),
/* 0010 ... */
/* 00 */ V(2, 1, 1), /* 48 */
/* 01 */ V(2, 1, 1),
/* 10 */ V(0, 2, 2),
/* 11 */ V(2, 0, 2),
/* 0000 0000 ... */
/* 00 */ V(5, 5, 2), /* 52 */
/* 01 */ V(4, 5, 2),
/* 10 */ V(5, 4, 2),
/* 11 */ V(5, 3, 2),
/* 0000 0001 ... */
/* 0 */ V(3, 5, 1), /* 56 */
/* 1 */ V(4, 4, 1),
/* 0000 0010 ... */
/* 0 */ V(2, 5, 1), /* 58 */
/* 1 */ V(5, 2, 1),
/* 0000 0101 ... */
/* 0 */ V(0, 5, 1), /* 60 */
/* 1 */ V(3, 4, 1),
/* 0000 0111 ... */
/* 0 */ V(4, 3, 1), /* 62 */
/* 1 */ V(3, 3, 1)
];
const hufftab8 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ V(1, 2, 4),
/* 0011 */ V(2, 1, 4),
/* 0100 */ V(1, 1, 2),
/* 0101 */ V(1, 1, 2),
/* 0110 */ V(1, 1, 2),
/* 0111 */ V(1, 1, 2),
/* 1000 */ V(0, 1, 3),
/* 1001 */ V(0, 1, 3),
/* 1010 */ V(1, 0, 3),
/* 1011 */ V(1, 0, 3),
/* 1100 */ V(0, 0, 2),
/* 1101 */ V(0, 0, 2),
/* 1110 */ V(0, 0, 2),
/* 1111 */ V(0, 0, 2),
/* 0000 ... */
/* 0000 */ PTR(48, 3), /* 16 */
/* 0001 */ PTR(56, 2),
/* 0010 */ PTR(60, 1),
/* 0011 */ V(1, 5, 4),
/* 0100 */ V(5, 1, 4),
/* 0101 */ PTR(62, 1),
/* 0110 */ PTR(64, 1),
/* 0111 */ V(2, 4, 4),
/* 1000 */ V(4, 2, 4),
/* 1001 */ V(1, 4, 4),
/* 1010 */ V(4, 1, 3),
/* 1011 */ V(4, 1, 3),
/* 1100 */ V(0, 4, 4),
/* 1101 */ V(4, 0, 4),
/* 1110 */ V(2, 3, 4),
/* 1111 */ V(3, 2, 4),
/* 0001 ... */
/* 0000 */ V(1, 3, 4), /* 32 */
/* 0001 */ V(3, 1, 4),
/* 0010 */ V(0, 3, 4),
/* 0011 */ V(3, 0, 4),
/* 0100 */ V(2, 2, 2),
/* 0101 */ V(2, 2, 2),
/* 0110 */ V(2, 2, 2),
/* 0111 */ V(2, 2, 2),
/* 1000 */ V(0, 2, 2),
/* 1001 */ V(0, 2, 2),
/* 1010 */ V(0, 2, 2),
/* 1011 */ V(0, 2, 2),
/* 1100 */ V(2, 0, 2),
/* 1101 */ V(2, 0, 2),
/* 1110 */ V(2, 0, 2),
/* 1111 */ V(2, 0, 2),
/* 0000 0000 ... */
/* 000 */ V(5, 5, 3), /* 48 */
/* 001 */ V(5, 4, 3),
/* 010 */ V(4, 5, 2),
/* 011 */ V(4, 5, 2),
/* 100 */ V(5, 3, 1),
/* 101 */ V(5, 3, 1),
/* 110 */ V(5, 3, 1),
/* 111 */ V(5, 3, 1),
/* 0000 0001 ... */
/* 00 */ V(3, 5, 2), /* 56 */
/* 01 */ V(4, 4, 2),
/* 10 */ V(2, 5, 1),
/* 11 */ V(2, 5, 1),
/* 0000 0010 ... */
/* 0 */ V(5, 2, 1), /* 60 */
/* 1 */ V(0, 5, 1),
/* 0000 0101 ... */
/* 0 */ V(3, 4, 1), /* 62 */
/* 1 */ V(4, 3, 1),
/* 0000 0110 ... */
/* 0 */ V(5, 0, 1), /* 64 */
/* 1 */ V(3, 3, 1)
];
const hufftab9 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 3),
/* 0010 */ PTR(40, 2),
/* 0011 */ PTR(44, 2),
/* 0100 */ PTR(48, 1),
/* 0101 */ V(1, 2, 4),
/* 0110 */ V(2, 1, 4),
/* 0111 */ V(2, 0, 4),
/* 1000 */ V(1, 1, 3),
/* 1001 */ V(1, 1, 3),
/* 1010 */ V(0, 1, 3),
/* 1011 */ V(0, 1, 3),
/* 1100 */ V(1, 0, 3),
/* 1101 */ V(1, 0, 3),
/* 1110 */ V(0, 0, 3),
/* 1111 */ V(0, 0, 3),
/* 0000 ... */
/* 0000 */ PTR(50, 1), /* 16 */
/* 0001 */ V(3, 5, 4),
/* 0010 */ V(5, 3, 4),
/* 0011 */ PTR(52, 1),
/* 0100 */ V(4, 4, 4),
/* 0101 */ V(2, 5, 4),
/* 0110 */ V(5, 2, 4),
/* 0111 */ V(1, 5, 4),
/* 1000 */ V(5, 1, 3),
/* 1001 */ V(5, 1, 3),
/* 1010 */ V(3, 4, 3),
/* 1011 */ V(3, 4, 3),
/* 1100 */ V(4, 3, 3),
/* 1101 */ V(4, 3, 3),
/* 1110 */ V(5, 0, 4),
/* 1111 */ V(0, 4, 4),
/* 0001 ... */
/* 000 */ V(2, 4, 3), /* 32 */
/* 001 */ V(4, 2, 3),
/* 010 */ V(3, 3, 3),
/* 011 */ V(4, 0, 3),
/* 100 */ V(1, 4, 2),
/* 101 */ V(1, 4, 2),
/* 110 */ V(4, 1, 2),
/* 111 */ V(4, 1, 2),
/* 0010 ... */
/* 00 */ V(2, 3, 2), /* 40 */
/* 01 */ V(3, 2, 2),
/* 10 */ V(1, 3, 1),
/* 11 */ V(1, 3, 1),
/* 0011 ... */
/* 00 */ V(3, 1, 1), /* 44 */
/* 01 */ V(3, 1, 1),
/* 10 */ V(0, 3, 2),
/* 11 */ V(3, 0, 2),
/* 0100 ... */
/* 0 */ V(2, 2, 1), /* 48 */
/* 1 */ V(0, 2, 1),
/* 0000 0000 ... */
/* 0 */ V(5, 5, 1), /* 50 */
/* 1 */ V(4, 5, 1),
/* 0000 0011 ... */
/* 0 */ V(5, 4, 1), /* 52 */
/* 1 */ V(0, 5, 1)
];
const hufftab10 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 2),
/* 0011 */ V(1, 1, 4),
/* 0100 */ V(0, 1, 3),
/* 0101 */ V(0, 1, 3),
/* 0110 */ V(1, 0, 3),
/* 0111 */ V(1, 0, 3),
/* 1000 */ V(0, 0, 1),
/* 1001 */ V(0, 0, 1),
/* 1010 */ V(0, 0, 1),
/* 1011 */ V(0, 0, 1),
/* 1100 */ V(0, 0, 1),
/* 1101 */ V(0, 0, 1),
/* 1110 */ V(0, 0, 1),
/* 1111 */ V(0, 0, 1),
/* 0000 ... */
/* 0000 */ PTR(52, 3), /* 16 */
/* 0001 */ PTR(60, 2),
/* 0010 */ PTR(64, 3),
/* 0011 */ PTR(72, 1),
/* 0100 */ PTR(74, 2),
/* 0101 */ PTR(78, 2),
/* 0110 */ PTR(82, 2),
/* 0111 */ V(1, 7, 4),
/* 1000 */ V(7, 1, 4),
/* 1001 */ PTR(86, 1),
/* 1010 */ PTR(88, 2),
/* 1011 */ PTR(92, 2),
/* 1100 */ V(1, 6, 4),
/* 1101 */ V(6, 1, 4),
/* 1110 */ V(6, 0, 4),
/* 1111 */ PTR(96, 1),
/* 0001 ... */
/* 0000 */ PTR(98, 1), /* 32 */
/* 0001 */ PTR(100, 1),
/* 0010 */ V(1, 4, 4),
/* 0011 */ V(4, 1, 4),
/* 0100 */ V(4, 0, 4),
/* 0101 */ V(2, 3, 4),
/* 0110 */ V(3, 2, 4),
/* 0111 */ V(0, 3, 4),
/* 1000 */ V(1, 3, 3),
/* 1001 */ V(1, 3, 3),
/* 1010 */ V(3, 1, 3),
/* 1011 */ V(3, 1, 3),
/* 1100 */ V(3, 0, 3),
/* 1101 */ V(3, 0, 3),
/* 1110 */ V(2, 2, 3),
/* 1111 */ V(2, 2, 3),
/* 0010 ... */
/* 00 */ V(1, 2, 2), /* 48 */
/* 01 */ V(2, 1, 2),
/* 10 */ V(0, 2, 2),
/* 11 */ V(2, 0, 2),
/* 0000 0000 ... */
/* 000 */ V(7, 7, 3), /* 52 */
/* 001 */ V(6, 7, 3),
/* 010 */ V(7, 6, 3),
/* 011 */ V(5, 7, 3),
/* 100 */ V(7, 5, 3),
/* 101 */ V(6, 6, 3),
/* 110 */ V(4, 7, 2),
/* 111 */ V(4, 7, 2),
/* 0000 0001 ... */
/* 00 */ V(7, 4, 2), /* 60 */
/* 01 */ V(5, 6, 2),
/* 10 */ V(6, 5, 2),
/* 11 */ V(3, 7, 2),
/* 0000 0010 ... */
/* 000 */ V(7, 3, 2), /* 64 */
/* 001 */ V(7, 3, 2),
/* 010 */ V(4, 6, 2),
/* 011 */ V(4, 6, 2),
/* 100 */ V(5, 5, 3),
/* 101 */ V(5, 4, 3),
/* 110 */ V(6, 3, 2),
/* 111 */ V(6, 3, 2),
/* 0000 0011 ... */
/* 0 */ V(2, 7, 1), /* 72 */
/* 1 */ V(7, 2, 1),
/* 0000 0100 ... */
/* 00 */ V(6, 4, 2), /* 74 */
/* 01 */ V(0, 7, 2),
/* 10 */ V(7, 0, 1),
/* 11 */ V(7, 0, 1),
/* 0000 0101 ... */
/* 00 */ V(6, 2, 1), /* 78 */
/* 01 */ V(6, 2, 1),
/* 10 */ V(4, 5, 2),
/* 11 */ V(3, 5, 2),
/* 0000 0110 ... */
/* 00 */ V(0, 6, 1), /* 82 */
/* 01 */ V(0, 6, 1),
/* 10 */ V(5, 3, 2),
/* 11 */ V(4, 4, 2),
/* 0000 1001 ... */
/* 0 */ V(3, 6, 1), /* 86 */
/* 1 */ V(2, 6, 1),
/* 0000 1010 ... */
/* 00 */ V(2, 5, 2), /* 88 */
/* 01 */ V(5, 2, 2),
/* 10 */ V(1, 5, 1),
/* 11 */ V(1, 5, 1),
/* 0000 1011 ... */
/* 00 */ V(5, 1, 1), /* 92 */
/* 01 */ V(5, 1, 1),
/* 10 */ V(3, 4, 2),
/* 11 */ V(4, 3, 2),
/* 0000 1111 ... */
/* 0 */ V(0, 5, 1), /* 96 */
/* 1 */ V(5, 0, 1),
/* 0001 0000 ... */
/* 0 */ V(2, 4, 1), /* 98 */
/* 1 */ V(4, 2, 1),
/* 0001 0001 ... */
/* 0 */ V(3, 3, 1), /* 100 */
/* 1 */ V(0, 4, 1)
];
const hufftab11 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 4),
/* 0011 */ PTR(64, 3),
/* 0100 */ V(1, 2, 4),
/* 0101 */ PTR(72, 1),
/* 0110 */ V(1, 1, 3),
/* 0111 */ V(1, 1, 3),
/* 1000 */ V(0, 1, 3),
/* 1001 */ V(0, 1, 3),
/* 1010 */ V(1, 0, 3),
/* 1011 */ V(1, 0, 3),
/* 1100 */ V(0, 0, 2),
/* 1101 */ V(0, 0, 2),
/* 1110 */ V(0, 0, 2),
/* 1111 */ V(0, 0, 2),
/* 0000 ... */
/* 0000 */ PTR(74, 2), /* 16 */
/* 0001 */ PTR(78, 3),
/* 0010 */ PTR(86, 2),
/* 0011 */ PTR(90, 1),
/* 0100 */ PTR(92, 2),
/* 0101 */ V(2, 7, 4),
/* 0110 */ V(7, 2, 4),
/* 0111 */ PTR(96, 1),
/* 1000 */ V(7, 1, 3),
/* 1001 */ V(7, 1, 3),
/* 1010 */ V(1, 7, 4),
/* 1011 */ V(7, 0, 4),
/* 1100 */ V(3, 6, 4),
/* 1101 */ V(6, 3, 4),
/* 1110 */ V(6, 0, 4),
/* 1111 */ PTR(98, 1),
/* 0001 ... */
/* 0000 */ PTR(100, 1), /* 32 */
/* 0001 */ V(1, 5, 4),
/* 0010 */ V(6, 2, 3),
/* 0011 */ V(6, 2, 3),
/* 0100 */ V(2, 6, 4),
/* 0101 */ V(0, 6, 4),
/* 0110 */ V(1, 6, 3),
/* 0111 */ V(1, 6, 3),
/* 1000 */ V(6, 1, 3),
/* 1001 */ V(6, 1, 3),
/* 1010 */ V(5, 1, 4),
/* 1011 */ V(3, 4, 4),
/* 1100 */ V(5, 0, 4),
/* 1101 */ PTR(102, 1),
/* 1110 */ V(2, 4, 4),
/* 1111 */ V(4, 2, 4),
/* 0010 ... */
/* 0000 */ V(1, 4, 4), /* 48 */
/* 0001 */ V(4, 1, 4),
/* 0010 */ V(0, 4, 4),
/* 0011 */ V(4, 0, 4),
/* 0100 */ V(2, 3, 3),
/* 0101 */ V(2, 3, 3),
/* 0110 */ V(3, 2, 3),
/* 0111 */ V(3, 2, 3),
/* 1000 */ V(1, 3, 2),
/* 1001 */ V(1, 3, 2),
/* 1010 */ V(1, 3, 2),
/* 1011 */ V(1, 3, 2),
/* 1100 */ V(3, 1, 2),
/* 1101 */ V(3, 1, 2),
/* 1110 */ V(3, 1, 2),
/* 1111 */ V(3, 1, 2),
/* 0011 ... */
/* 000 */ V(0, 3, 3), /* 64 */
/* 001 */ V(3, 0, 3),
/* 010 */ V(2, 2, 2),
/* 011 */ V(2, 2, 2),
/* 100 */ V(2, 1, 1),
/* 101 */ V(2, 1, 1),
/* 110 */ V(2, 1, 1),
/* 111 */ V(2, 1, 1),
/* 0101 ... */
/* 0 */ V(0, 2, 1), /* 72 */
/* 1 */ V(2, 0, 1),
/* 0000 0000 ... */
/* 00 */ V(7, 7, 2), /* 74 */
/* 01 */ V(6, 7, 2),
/* 10 */ V(7, 6, 2),
/* 11 */ V(7, 5, 2),
/* 0000 0001 ... */
/* 000 */ V(6, 6, 2), /* 78 */
/* 001 */ V(6, 6, 2),
/* 010 */ V(4, 7, 2),
/* 011 */ V(4, 7, 2),
/* 100 */ V(7, 4, 2),
/* 101 */ V(7, 4, 2),
/* 110 */ V(5, 7, 3),
/* 111 */ V(5, 5, 3),
/* 0000 0010 ... */
/* 00 */ V(5, 6, 2), /* 86 */
/* 01 */ V(6, 5, 2),
/* 10 */ V(3, 7, 1),
/* 11 */ V(3, 7, 1),
/* 0000 0011 ... */
/* 0 */ V(7, 3, 1), /* 90 */
/* 1 */ V(4, 6, 1),
/* 0000 0100 ... */
/* 00 */ V(4, 5, 2), /* 92 */
/* 01 */ V(5, 4, 2),
/* 10 */ V(3, 5, 2),
/* 11 */ V(5, 3, 2),
/* 0000 0111 ... */
/* 0 */ V(6, 4, 1), /* 96 */
/* 1 */ V(0, 7, 1),
/* 0000 1111 ... */
/* 0 */ V(4, 4, 1), /* 98 */
/* 1 */ V(2, 5, 1),
/* 0001 0000 ... */
/* 0 */ V(5, 2, 1), /* 100 */
/* 1 */ V(0, 5, 1),
/* 0001 1101 ... */
/* 0 */ V(4, 3, 1), /* 102 */
/* 1 */ V(3, 3, 1)
];
const hufftab12 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 4),
/* 0011 */ PTR(64, 2),
/* 0100 */ PTR(68, 3),
/* 0101 */ PTR(76, 1),
/* 0110 */ V(1, 2, 4),
/* 0111 */ V(2, 1, 4),
/* 1000 */ PTR(78, 1),
/* 1001 */ V(0, 0, 4),
/* 1010 */ V(1, 1, 3),
/* 1011 */ V(1, 1, 3),
/* 1100 */ V(0, 1, 3),
/* 1101 */ V(0, 1, 3),
/* 1110 */ V(1, 0, 3),
/* 1111 */ V(1, 0, 3),
/* 0000 ... */
/* 0000 */ PTR(80, 2), /* 16 */
/* 0001 */ PTR(84, 1),
/* 0010 */ PTR(86, 1),
/* 0011 */ PTR(88, 1),
/* 0100 */ V(5, 6, 4),
/* 0101 */ V(3, 7, 4),
/* 0110 */ PTR(90, 1),
/* 0111 */ V(2, 7, 4),
/* 1000 */ V(7, 2, 4),
/* 1001 */ V(4, 6, 4),
/* 1010 */ V(6, 4, 4),
/* 1011 */ V(1, 7, 4),
/* 1100 */ V(7, 1, 4),
/* 1101 */ PTR(92, 1),
/* 1110 */ V(3, 6, 4),
/* 1111 */ V(6, 3, 4),
/* 0001 ... */
/* 0000 */ V(4, 5, 4), /* 32 */
/* 0001 */ V(5, 4, 4),
/* 0010 */ V(4, 4, 4),
/* 0011 */ PTR(94, 1),
/* 0100 */ V(2, 6, 3),
/* 0101 */ V(2, 6, 3),
/* 0110 */ V(6, 2, 3),
/* 0111 */ V(6, 2, 3),
/* 1000 */ V(6, 1, 3),
/* 1001 */ V(6, 1, 3),
/* 1010 */ V(1, 6, 4),
/* 1011 */ V(6, 0, 4),
/* 1100 */ V(3, 5, 4),
/* 1101 */ V(5, 3, 4),
/* 1110 */ V(2, 5, 4),
/* 1111 */ V(5, 2, 4),
/* 0010 ... */
/* 0000 */ V(1, 5, 3), /* 48 */
/* 0001 */ V(1, 5, 3),
/* 0010 */ V(5, 1, 3),
/* 0011 */ V(5, 1, 3),
/* 0100 */ V(3, 4, 3),
/* 0101 */ V(3, 4, 3),
/* 0110 */ V(4, 3, 3),
/* 0111 */ V(4, 3, 3),
/* 1000 */ V(5, 0, 4),
/* 1001 */ V(0, 4, 4),
/* 1010 */ V(2, 4, 3),
/* 1011 */ V(2, 4, 3),
/* 1100 */ V(4, 2, 3),
/* 1101 */ V(4, 2, 3),
/* 1110 */ V(1, 4, 3),
/* 1111 */ V(1, 4, 3),
/* 0011 ... */
/* 00 */ V(3, 3, 2), /* 64 */
/* 01 */ V(4, 1, 2),
/* 10 */ V(2, 3, 2),
/* 11 */ V(3, 2, 2),
/* 0100 ... */
/* 000 */ V(4, 0, 3), /* 68 */
/* 001 */ V(0, 3, 3),
/* 010 */ V(3, 0, 2),
/* 011 */ V(3, 0, 2),
/* 100 */ V(1, 3, 1),
/* 101 */ V(1, 3, 1),
/* 110 */ V(1, 3, 1),
/* 111 */ V(1, 3, 1),
/* 0101 ... */
/* 0 */ V(3, 1, 1), /* 76 */
/* 1 */ V(2, 2, 1),
/* 1000 ... */
/* 0 */ V(0, 2, 1), /* 78 */
/* 1 */ V(2, 0, 1),
/* 0000 0000 ... */
/* 00 */ V(7, 7, 2), /* 80 */
/* 01 */ V(6, 7, 2),
/* 10 */ V(7, 6, 1),
/* 11 */ V(7, 6, 1),
/* 0000 0001 ... */
/* 0 */ V(5, 7, 1), /* 84 */
/* 1 */ V(7, 5, 1),
/* 0000 0010 ... */
/* 0 */ V(6, 6, 1), /* 86 */
/* 1 */ V(4, 7, 1),
/* 0000 0011 ... */
/* 0 */ V(7, 4, 1), /* 88 */
/* 1 */ V(6, 5, 1),
/* 0000 0110 ... */
/* 0 */ V(7, 3, 1), /* 90 */
/* 1 */ V(5, 5, 1),
/* 0000 1101 ... */
/* 0 */ V(0, 7, 1), /* 92 */
/* 1 */ V(7, 0, 1),
/* 0001 0011 ... */
/* 0 */ V(0, 6, 1), /* 94 */
/* 1 */ V(0, 5, 1)
];
const hufftab13 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 4),
/* 0011 */ PTR(64, 2),
/* 0100 */ V(1, 1, 4),
/* 0101 */ V(0, 1, 4),
/* 0110 */ V(1, 0, 3),
/* 0111 */ V(1, 0, 3),
/* 1000 */ V(0, 0, 1),
/* 1001 */ V(0, 0, 1),
/* 1010 */ V(0, 0, 1),
/* 1011 */ V(0, 0, 1),
/* 1100 */ V(0, 0, 1),
/* 1101 */ V(0, 0, 1),
/* 1110 */ V(0, 0, 1),
/* 1111 */ V(0, 0, 1),
/* 0000 ... */
/* 0000 */ PTR(68, 4), /* 16 */
/* 0001 */ PTR(84, 4),
/* 0010 */ PTR(100, 4),
/* 0011 */ PTR(116, 4),
/* 0100 */ PTR(132, 4),
/* 0101 */ PTR(148, 4),
/* 0110 */ PTR(164, 3),
/* 0111 */ PTR(172, 3),
/* 1000 */ PTR(180, 3),
/* 1001 */ PTR(188, 3),
/* 1010 */ PTR(196, 3),
/* 1011 */ PTR(204, 3),
/* 1100 */ PTR(212, 1),
/* 1101 */ PTR(214, 2),
/* 1110 */ PTR(218, 3),
/* 1111 */ PTR(226, 1),
/* 0001 ... */
/* 0000 */ PTR(228, 2), /* 32 */
/* 0001 */ PTR(232, 2),
/* 0010 */ PTR(236, 2),
/* 0011 */ PTR(240, 2),
/* 0100 */ V(8, 1, 4),
/* 0101 */ PTR(244, 1),
/* 0110 */ PTR(246, 1),
/* 0111 */ PTR(248, 1),
/* 1000 */ PTR(250, 2),
/* 1001 */ PTR(254, 1),
/* 1010 */ V(1, 5, 4),
/* 1011 */ V(5, 1, 4),
/* 1100 */ PTR(256, 1),
/* 1101 */ PTR(258, 1),
/* 1110 */ PTR(260, 1),
/* 1111 */ V(1, 4, 4),
/* 0010 ... */
/* 0000 */ V(4, 1, 3), /* 48 */
/* 0001 */ V(4, 1, 3),
/* 0010 */ V(0, 4, 4),
/* 0011 */ V(4, 0, 4),
/* 0100 */ V(2, 3, 4),
/* 0101 */ V(3, 2, 4),
/* 0110 */ V(1, 3, 3),
/* 0111 */ V(1, 3, 3),
/* 1000 */ V(3, 1, 3),
/* 1001 */ V(3, 1, 3),
/* 1010 */ V(0, 3, 3),
/* 1011 */ V(0, 3, 3),
/* 1100 */ V(3, 0, 3),
/* 1101 */ V(3, 0, 3),
/* 1110 */ V(2, 2, 3),
/* 1111 */ V(2, 2, 3),
/* 0011 ... */
/* 00 */ V(1, 2, 2), /* 64 */
/* 01 */ V(2, 1, 2),
/* 10 */ V(0, 2, 2),
/* 11 */ V(2, 0, 2),
/* 0000 0000 ... */
/* 0000 */ PTR(262, 4), /* 68 */
/* 0001 */ PTR(278, 4),
/* 0010 */ PTR(294, 4),
/* 0011 */ PTR(310, 3),
/* 0100 */ PTR(318, 2),
/* 0101 */ PTR(322, 2),
/* 0110 */ PTR(326, 3),
/* 0111 */ PTR(334, 2),
/* 1000 */ PTR(338, 1),
/* 1001 */ PTR(340, 2),
/* 1010 */ PTR(344, 2),
/* 1011 */ PTR(348, 2),
/* 1100 */ PTR(352, 2),
/* 1101 */ PTR(356, 2),
/* 1110 */ V(1, 15, 4),
/* 1111 */ V(15, 1, 4),
/* 0000 0001 ... */
/* 0000 */ V(15, 0, 4), /* 84 */
/* 0001 */ PTR(360, 1),
/* 0010 */ PTR(362, 1),
/* 0011 */ PTR(364, 1),
/* 0100 */ V(14, 2, 4),
/* 0101 */ PTR(366, 1),
/* 0110 */ V(1, 14, 4),
/* 0111 */ V(14, 1, 4),
/* 1000 */ PTR(368, 1),
/* 1001 */ PTR(370, 1),
/* 1010 */ PTR(372, 1),
/* 1011 */ PTR(374, 1),
/* 1100 */ PTR(376, 1),
/* 1101 */ PTR(378, 1),
/* 1110 */ V(12, 6, 4),
/* 1111 */ V(3, 13, 4),
/* 0000 0010 ... */
/* 0000 */ PTR(380, 1), /* 100 */
/* 0001 */ V(2, 13, 4),
/* 0010 */ V(13, 2, 4),
/* 0011 */ V(1, 13, 4),
/* 0100 */ V(11, 7, 4),
/* 0101 */ PTR(382, 1),
/* 0110 */ PTR(384, 1),
/* 0111 */ V(12, 3, 4),
/* 1000 */ PTR(386, 1),
/* 1001 */ V(4, 11, 4),
/* 1010 */ V(13, 1, 3),
/* 1011 */ V(13, 1, 3),
/* 1100 */ V(0, 13, 4),
/* 1101 */ V(13, 0, 4),
/* 1110 */ V(8, 10, 4),
/* 1111 */ V(10, 8, 4),
/* 0000 0011 ... */
/* 0000 */ V(4, 12, 4), /* 116 */
/* 0001 */ V(12, 4, 4),
/* 0010 */ V(6, 11, 4),
/* 0011 */ V(11, 6, 4),
/* 0100 */ V(3, 12, 3),
/* 0101 */ V(3, 12, 3),
/* 0110 */ V(2, 12, 3),
/* 0111 */ V(2, 12, 3),
/* 1000 */ V(12, 2, 3),
/* 1001 */ V(12, 2, 3),
/* 1010 */ V(5, 11, 3),
/* 1011 */ V(5, 11, 3),
/* 1100 */ V(11, 5, 4),
/* 1101 */ V(8, 9, 4),
/* 1110 */ V(1, 12, 3),
/* 1111 */ V(1, 12, 3),
/* 0000 0100 ... */
/* 0000 */ V(12, 1, 3), /* 132 */
/* 0001 */ V(12, 1, 3),
/* 0010 */ V(9, 8, 4),
/* 0011 */ V(0, 12, 4),
/* 0100 */ V(12, 0, 3),
/* 0101 */ V(12, 0, 3),
/* 0110 */ V(11, 4, 4),
/* 0111 */ V(6, 10, 4),
/* 1000 */ V(10, 6, 4),
/* 1001 */ V(7, 9, 4),
/* 1010 */ V(3, 11, 3),
/* 1011 */ V(3, 11, 3),
/* 1100 */ V(11, 3, 3),
/* 1101 */ V(11, 3, 3),
/* 1110 */ V(8, 8, 4),
/* 1111 */ V(5, 10, 4),
/* 0000 0101 ... */
/* 0000 */ V(2, 11, 3), /* 148 */
/* 0001 */ V(2, 11, 3),
/* 0010 */ V(10, 5, 4),
/* 0011 */ V(6, 9, 4),
/* 0100 */ V(10, 4, 3),
/* 0101 */ V(10, 4, 3),
/* 0110 */ V(7, 8, 4),
/* 0111 */ V(8, 7, 4),
/* 1000 */ V(9, 4, 3),
/* 1001 */ V(9, 4, 3),
/* 1010 */ V(7, 7, 4),
/* 1011 */ V(7, 6, 4),
/* 1100 */ V(11, 2, 2),
/* 1101 */ V(11, 2, 2),
/* 1110 */ V(11, 2, 2),
/* 1111 */ V(11, 2, 2),
/* 0000 0110 ... */
/* 000 */ V(1, 11, 2), /* 164 */
/* 001 */ V(1, 11, 2),
/* 010 */ V(11, 1, 2),
/* 011 */ V(11, 1, 2),
/* 100 */ V(0, 11, 3),
/* 101 */ V(11, 0, 3),
/* 110 */ V(9, 6, 3),
/* 111 */ V(4, 10, 3),
/* 0000 0111 ... */
/* 000 */ V(3, 10, 3), /* 172 */
/* 001 */ V(10, 3, 3),
/* 010 */ V(5, 9, 3),
/* 011 */ V(9, 5, 3),
/* 100 */ V(2, 10, 2),
/* 101 */ V(2, 10, 2),
/* 110 */ V(10, 2, 2),
/* 111 */ V(10, 2, 2),
/* 0000 1000 ... */
/* 000 */ V(1, 10, 2), /* 180 */
/* 001 */ V(1, 10, 2),
/* 010 */ V(10, 1, 2),
/* 011 */ V(10, 1, 2),
/* 100 */ V(0, 10, 3),
/* 101 */ V(6, 8, 3),
/* 110 */ V(10, 0, 2),
/* 111 */ V(10, 0, 2),
/* 0000 1001 ... */
/* 000 */ V(8, 6, 3), /* 188 */
/* 001 */ V(4, 9, 3),
/* 010 */ V(9, 3, 2),
/* 011 */ V(9, 3, 2),
/* 100 */ V(3, 9, 3),
/* 101 */ V(5, 8, 3),
/* 110 */ V(8, 5, 3),
/* 111 */ V(6, 7, 3),
/* 0000 1010 ... */
/* 000 */ V(2, 9, 2), /* 196 */
/* 001 */ V(2, 9, 2),
/* 010 */ V(9, 2, 2),
/* 011 */ V(9, 2, 2),
/* 100 */ V(5, 7, 3),
/* 101 */ V(7, 5, 3),
/* 110 */ V(3, 8, 2),
/* 111 */ V(3, 8, 2),
/* 0000 1011 ... */
/* 000 */ V(8, 3, 2), /* 204 */
/* 001 */ V(8, 3, 2),
/* 010 */ V(6, 6, 3),
/* 011 */ V(4, 7, 3),
/* 100 */ V(7, 4, 3),
/* 101 */ V(5, 6, 3),
/* 110 */ V(6, 5, 3),
/* 111 */ V(7, 3, 3),
/* 0000 1100 ... */
/* 0 */ V(1, 9, 1), /* 212 */
/* 1 */ V(9, 1, 1),
/* 0000 1101 ... */
/* 00 */ V(0, 9, 2), /* 214 */
/* 01 */ V(9, 0, 2),
/* 10 */ V(4, 8, 2),
/* 11 */ V(8, 4, 2),
/* 0000 1110 ... */
/* 000 */ V(7, 2, 2), /* 218 */
/* 001 */ V(7, 2, 2),
/* 010 */ V(4, 6, 3),
/* 011 */ V(6, 4, 3),
/* 100 */ V(2, 8, 1),
/* 101 */ V(2, 8, 1),
/* 110 */ V(2, 8, 1),
/* 111 */ V(2, 8, 1),
/* 0000 1111 ... */
/* 0 */ V(8, 2, 1), /* 226 */
/* 1 */ V(1, 8, 1),
/* 0001 0000 ... */
/* 00 */ V(3, 7, 2), /* 228 */
/* 01 */ V(2, 7, 2),
/* 10 */ V(1, 7, 1),
/* 11 */ V(1, 7, 1),
/* 0001 0001 ... */
/* 00 */ V(7, 1, 1), /* 232 */
/* 01 */ V(7, 1, 1),
/* 10 */ V(5, 5, 2),
/* 11 */ V(0, 7, 2),
/* 0001 0010 ... */
/* 00 */ V(7, 0, 2), /* 236 */
/* 01 */ V(3, 6, 2),
/* 10 */ V(6, 3, 2),
/* 11 */ V(4, 5, 2),
/* 0001 0011 ... */
/* 00 */ V(5, 4, 2), /* 240 */
/* 01 */ V(2, 6, 2),
/* 10 */ V(6, 2, 2),
/* 11 */ V(3, 5, 2),
/* 0001 0101 ... */
/* 0 */ V(0, 8, 1), /* 244 */
/* 1 */ V(8, 0, 1),
/* 0001 0110 ... */
/* 0 */ V(1, 6, 1), /* 246 */
/* 1 */ V(6, 1, 1),
/* 0001 0111 ... */
/* 0 */ V(0, 6, 1), /* 248 */
/* 1 */ V(6, 0, 1),
/* 0001 1000 ... */
/* 00 */ V(5, 3, 2), /* 250 */
/* 01 */ V(4, 4, 2),
/* 10 */ V(2, 5, 1),
/* 11 */ V(2, 5, 1),
/* 0001 1001 ... */
/* 0 */ V(5, 2, 1), /* 254 */
/* 1 */ V(0, 5, 1),
/* 0001 1100 ... */
/* 0 */ V(3, 4, 1), /* 256 */
/* 1 */ V(4, 3, 1),
/* 0001 1101 ... */
/* 0 */ V(5, 0, 1), /* 258 */
/* 1 */ V(2, 4, 1),
/* 0001 1110 ... */
/* 0 */ V(4, 2, 1), /* 260 */
/* 1 */ V(3, 3, 1),
/* 0000 0000 0000 ... */
/* 0000 */ PTR(388, 3), /* 262 */
/* 0001 */ V(15, 15, 4),
/* 0010 */ V(14, 15, 4),
/* 0011 */ V(13, 15, 4),
/* 0100 */ V(14, 14, 4),
/* 0101 */ V(12, 15, 4),
/* 0110 */ V(13, 14, 4),
/* 0111 */ V(11, 15, 4),
/* 1000 */ V(15, 11, 4),
/* 1001 */ V(12, 14, 4),
/* 1010 */ V(13, 12, 4),
/* 1011 */ PTR(396, 1),
/* 1100 */ V(14, 12, 3),
/* 1101 */ V(14, 12, 3),
/* 1110 */ V(13, 13, 3),
/* 1111 */ V(13, 13, 3),
/* 0000 0000 0001 ... */
/* 0000 */ V(15, 10, 4), /* 278 */
/* 0001 */ V(12, 13, 4),
/* 0010 */ V(11, 14, 3),
/* 0011 */ V(11, 14, 3),
/* 0100 */ V(14, 11, 3),
/* 0101 */ V(14, 11, 3),
/* 0110 */ V(9, 15, 3),
/* 0111 */ V(9, 15, 3),
/* 1000 */ V(15, 9, 3),
/* 1001 */ V(15, 9, 3),
/* 1010 */ V(14, 10, 3),
/* 1011 */ V(14, 10, 3),
/* 1100 */ V(11, 13, 3),
/* 1101 */ V(11, 13, 3),
/* 1110 */ V(13, 11, 3),
/* 1111 */ V(13, 11, 3),
/* 0000 0000 0010 ... */
/* 0000 */ V(8, 15, 3), /* 294 */
/* 0001 */ V(8, 15, 3),
/* 0010 */ V(15, 8, 3),
/* 0011 */ V(15, 8, 3),
/* 0100 */ V(12, 12, 3),
/* 0101 */ V(12, 12, 3),
/* 0110 */ V(10, 14, 4),
/* 0111 */ V(9, 14, 4),
/* 1000 */ V(8, 14, 3),
/* 1001 */ V(8, 14, 3),
/* 1010 */ V(7, 15, 4),
/* 1011 */ V(7, 14, 4),
/* 1100 */ V(15, 7, 2),
/* 1101 */ V(15, 7, 2),
/* 1110 */ V(15, 7, 2),
/* 1111 */ V(15, 7, 2),
/* 0000 0000 0011 ... */
/* 000 */ V(13, 10, 2), /* 310 */
/* 001 */ V(13, 10, 2),
/* 010 */ V(10, 13, 3),
/* 011 */ V(11, 12, 3),
/* 100 */ V(12, 11, 3),
/* 101 */ V(15, 6, 3),
/* 110 */ V(6, 15, 2),
/* 111 */ V(6, 15, 2),
/* 0000 0000 0100 ... */
/* 00 */ V(14, 8, 2), /* 318 */
/* 01 */ V(5, 15, 2),
/* 10 */ V(9, 13, 2),
/* 11 */ V(13, 9, 2),
/* 0000 0000 0101 ... */
/* 00 */ V(15, 5, 2), /* 322 */
/* 01 */ V(14, 7, 2),
/* 10 */ V(10, 12, 2),
/* 11 */ V(11, 11, 2),
/* 0000 0000 0110 ... */
/* 000 */ V(4, 15, 2), /* 326 */
/* 001 */ V(4, 15, 2),
/* 010 */ V(15, 4, 2),
/* 011 */ V(15, 4, 2),
/* 100 */ V(12, 10, 3),
/* 101 */ V(14, 6, 3),
/* 110 */ V(15, 3, 2),
/* 111 */ V(15, 3, 2),
/* 0000 0000 0111 ... */
/* 00 */ V(3, 15, 1), /* 334 */
/* 01 */ V(3, 15, 1),
/* 10 */ V(8, 13, 2),
/* 11 */ V(13, 8, 2),
/* 0000 0000 1000 ... */
/* 0 */ V(2, 15, 1), /* 338 */
/* 1 */ V(15, 2, 1),
/* 0000 0000 1001 ... */
/* 00 */ V(6, 14, 2), /* 340 */
/* 01 */ V(9, 12, 2),
/* 10 */ V(0, 15, 1),
/* 11 */ V(0, 15, 1),
/* 0000 0000 1010 ... */
/* 00 */ V(12, 9, 2), /* 344 */
/* 01 */ V(5, 14, 2),
/* 10 */ V(10, 11, 1),
/* 11 */ V(10, 11, 1),
/* 0000 0000 1011 ... */
/* 00 */ V(7, 13, 2), /* 348 */
/* 01 */ V(13, 7, 2),
/* 10 */ V(4, 14, 1),
/* 11 */ V(4, 14, 1),
/* 0000 0000 1100 ... */
/* 00 */ V(12, 8, 2), /* 352 */
/* 01 */ V(13, 6, 2),
/* 10 */ V(3, 14, 1),
/* 11 */ V(3, 14, 1),
/* 0000 0000 1101 ... */
/* 00 */ V(11, 9, 1), /* 356 */
/* 01 */ V(11, 9, 1),
/* 10 */ V(9, 11, 2),
/* 11 */ V(10, 10, 2),
/* 0000 0001 0001 ... */
/* 0 */ V(11, 10, 1), /* 360 */
/* 1 */ V(14, 5, 1),
/* 0000 0001 0010 ... */
/* 0 */ V(14, 4, 1), /* 362 */
/* 1 */ V(8, 12, 1),
/* 0000 0001 0011 ... */
/* 0 */ V(6, 13, 1), /* 364 */
/* 1 */ V(14, 3, 1),
/* 0000 0001 0101 ... */
/* 0 */ V(2, 14, 1), /* 366 */
/* 1 */ V(0, 14, 1),
/* 0000 0001 1000 ... */
/* 0 */ V(14, 0, 1), /* 368 */
/* 1 */ V(5, 13, 1),
/* 0000 0001 1001 ... */
/* 0 */ V(13, 5, 1), /* 370 */
/* 1 */ V(7, 12, 1),
/* 0000 0001 1010 ... */
/* 0 */ V(12, 7, 1), /* 372 */
/* 1 */ V(4, 13, 1),
/* 0000 0001 1011 ... */
/* 0 */ V(8, 11, 1), /* 374 */
/* 1 */ V(11, 8, 1),
/* 0000 0001 1100 ... */
/* 0 */ V(13, 4, 1), /* 376 */
/* 1 */ V(9, 10, 1),
/* 0000 0001 1101 ... */
/* 0 */ V(10, 9, 1), /* 378 */
/* 1 */ V(6, 12, 1),
/* 0000 0010 0000 ... */
/* 0 */ V(13, 3, 1), /* 380 */
/* 1 */ V(7, 11, 1),
/* 0000 0010 0101 ... */
/* 0 */ V(5, 12, 1), /* 382 */
/* 1 */ V(12, 5, 1),
/* 0000 0010 0110 ... */
/* 0 */ V(9, 9, 1), /* 384 */
/* 1 */ V(7, 10, 1),
/* 0000 0010 1000 ... */
/* 0 */ V(10, 7, 1), /* 386 */
/* 1 */ V(9, 7, 1),
/* 0000 0000 0000 0000 ... */
/* 000 */ V(15, 14, 3), /* 388 */
/* 001 */ V(15, 12, 3),
/* 010 */ V(15, 13, 2),
/* 011 */ V(15, 13, 2),
/* 100 */ V(14, 13, 1),
/* 101 */ V(14, 13, 1),
/* 110 */ V(14, 13, 1),
/* 111 */ V(14, 13, 1),
/* 0000 0000 0000 1011 ... */
/* 0 */ V(10, 15, 1), /* 396 */
/* 1 */ V(14, 9, 1)
];
const hufftab15 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 4),
/* 0011 */ PTR(64, 4),
/* 0100 */ PTR(80, 4),
/* 0101 */ PTR(96, 3),
/* 0110 */ PTR(104, 3),
/* 0111 */ PTR(112, 2),
/* 1000 */ PTR(116, 1),
/* 1001 */ PTR(118, 1),
/* 1010 */ V(1, 1, 3),
/* 1011 */ V(1, 1, 3),
/* 1100 */ V(0, 1, 4),
/* 1101 */ V(1, 0, 4),
/* 1110 */ V(0, 0, 3),
/* 1111 */ V(0, 0, 3),
/* 0000 ... */
/* 0000 */ PTR(120, 4), /* 16 */
/* 0001 */ PTR(136, 4),
/* 0010 */ PTR(152, 4),
/* 0011 */ PTR(168, 4),
/* 0100 */ PTR(184, 4),
/* 0101 */ PTR(200, 3),
/* 0110 */ PTR(208, 3),
/* 0111 */ PTR(216, 4),
/* 1000 */ PTR(232, 3),
/* 1001 */ PTR(240, 3),
/* 1010 */ PTR(248, 3),
/* 1011 */ PTR(256, 3),
/* 1100 */ PTR(264, 2),
/* 1101 */ PTR(268, 3),
/* 1110 */ PTR(276, 3),
/* 1111 */ PTR(284, 2),
/* 0001 ... */
/* 0000 */ PTR(288, 2), /* 32 */
/* 0001 */ PTR(292, 2),
/* 0010 */ PTR(296, 2),
/* 0011 */ PTR(300, 2),
/* 0100 */ PTR(304, 2),
/* 0101 */ PTR(308, 2),
/* 0110 */ PTR(312, 2),
/* 0111 */ PTR(316, 2),
/* 1000 */ PTR(320, 1),
/* 1001 */ PTR(322, 1),
/* 1010 */ PTR(324, 1),
/* 1011 */ PTR(326, 2),
/* 1100 */ PTR(330, 1),
/* 1101 */ PTR(332, 1),
/* 1110 */ PTR(334, 2),
/* 1111 */ PTR(338, 1),
/* 0010 ... */
/* 0000 */ PTR(340, 1), /* 48 */
/* 0001 */ PTR(342, 1),
/* 0010 */ V(9, 1, 4),
/* 0011 */ PTR(344, 1),
/* 0100 */ PTR(346, 1),
/* 0101 */ PTR(348, 1),
/* 0110 */ PTR(350, 1),
/* 0111 */ PTR(352, 1),
/* 1000 */ V(2, 8, 4),
/* 1001 */ V(8, 2, 4),
/* 1010 */ V(1, 8, 4),
/* 1011 */ V(8, 1, 4),
/* 1100 */ PTR(354, 1),
/* 1101 */ PTR(356, 1),
/* 1110 */ PTR(358, 1),
/* 1111 */ PTR(360, 1),
/* 0011 ... */
/* 0000 */ V(2, 7, 4), /* 64 */
/* 0001 */ V(7, 2, 4),
/* 0010 */ V(6, 4, 4),
/* 0011 */ V(1, 7, 4),
/* 0100 */ V(5, 5, 4),
/* 0101 */ V(7, 1, 4),
/* 0110 */ PTR(362, 1),
/* 0111 */ V(3, 6, 4),
/* 1000 */ V(6, 3, 4),
/* 1001 */ V(4, 5, 4),
/* 1010 */ V(5, 4, 4),
/* 1011 */ V(2, 6, 4),
/* 1100 */ V(6, 2, 4),
/* 1101 */ V(1, 6, 4),
/* 1110 */ PTR(364, 1),
/* 1111 */ V(3, 5, 4),
/* 0100 ... */
/* 0000 */ V(6, 1, 3), /* 80 */
/* 0001 */ V(6, 1, 3),
/* 0010 */ V(5, 3, 4),
/* 0011 */ V(4, 4, 4),
/* 0100 */ V(2, 5, 3),
/* 0101 */ V(2, 5, 3),
/* 0110 */ V(5, 2, 3),
/* 0111 */ V(5, 2, 3),
/* 1000 */ V(1, 5, 3),
/* 1001 */ V(1, 5, 3),
/* 1010 */ V(5, 1, 3),
/* 1011 */ V(5, 1, 3),
/* 1100 */ V(0, 5, 4),
/* 1101 */ V(5, 0, 4),
/* 1110 */ V(3, 4, 3),
/* 1111 */ V(3, 4, 3),
/* 0101 ... */
/* 000 */ V(4, 3, 3), /* 96 */
/* 001 */ V(2, 4, 3),
/* 010 */ V(4, 2, 3),
/* 011 */ V(3, 3, 3),
/* 100 */ V(4, 1, 2),
/* 101 */ V(4, 1, 2),
/* 110 */ V(1, 4, 3),
/* 111 */ V(0, 4, 3),
/* 0110 ... */
/* 000 */ V(2, 3, 2), /* 104 */
/* 001 */ V(2, 3, 2),
/* 010 */ V(3, 2, 2),
/* 011 */ V(3, 2, 2),
/* 100 */ V(4, 0, 3),
/* 101 */ V(0, 3, 3),
/* 110 */ V(1, 3, 2),
/* 111 */ V(1, 3, 2),
/* 0111 ... */
/* 00 */ V(3, 1, 2), /* 112 */
/* 01 */ V(3, 0, 2),
/* 10 */ V(2, 2, 1),
/* 11 */ V(2, 2, 1),
/* 1000 ... */
/* 0 */ V(1, 2, 1), /* 116 */
/* 1 */ V(2, 1, 1),
/* 1001 ... */
/* 0 */ V(0, 2, 1), /* 118 */
/* 1 */ V(2, 0, 1),
/* 0000 0000 ... */
/* 0000 */ PTR(366, 1), /* 120 */
/* 0001 */ PTR(368, 1),
/* 0010 */ V(14, 14, 4),
/* 0011 */ PTR(370, 1),
/* 0100 */ PTR(372, 1),
/* 0101 */ PTR(374, 1),
/* 0110 */ V(15, 11, 4),
/* 0111 */ PTR(376, 1),
/* 1000 */ V(13, 13, 4),
/* 1001 */ V(10, 15, 4),
/* 1010 */ V(15, 10, 4),
/* 1011 */ V(11, 14, 4),
/* 1100 */ V(14, 11, 4),
/* 1101 */ V(12, 13, 4),
/* 1110 */ V(13, 12, 4),
/* 1111 */ V(9, 15, 4),
/* 0000 0001 ... */
/* 0000 */ V(15, 9, 4), /* 136 */
/* 0001 */ V(14, 10, 4),
/* 0010 */ V(11, 13, 4),
/* 0011 */ V(13, 11, 4),
/* 0100 */ V(8, 15, 4),
/* 0101 */ V(15, 8, 4),
/* 0110 */ V(12, 12, 4),
/* 0111 */ V(9, 14, 4),
/* 1000 */ V(14, 9, 4),
/* 1001 */ V(7, 15, 4),
/* 1010 */ V(15, 7, 4),
/* 1011 */ V(10, 13, 4),
/* 1100 */ V(13, 10, 4),
/* 1101 */ V(11, 12, 4),
/* 1110 */ V(6, 15, 4),
/* 1111 */ PTR(378, 1),
/* 0000 0010 ... */
/* 0000 */ V(12, 11, 3), /* 152 */
/* 0001 */ V(12, 11, 3),
/* 0010 */ V(15, 6, 3),
/* 0011 */ V(15, 6, 3),
/* 0100 */ V(8, 14, 4),
/* 0101 */ V(14, 8, 4),
/* 0110 */ V(5, 15, 4),
/* 0111 */ V(9, 13, 4),
/* 1000 */ V(15, 5, 3),
/* 1001 */ V(15, 5, 3),
/* 1010 */ V(7, 14, 3),
/* 1011 */ V(7, 14, 3),
/* 1100 */ V(14, 7, 3),
/* 1101 */ V(14, 7, 3),
/* 1110 */ V(10, 12, 3),
/* 1111 */ V(10, 12, 3),
/* 0000 0011 ... */
/* 0000 */ V(12, 10, 3), /* 168 */
/* 0001 */ V(12, 10, 3),
/* 0010 */ V(11, 11, 3),
/* 0011 */ V(11, 11, 3),
/* 0100 */ V(13, 9, 4),
/* 0101 */ V(8, 13, 4),
/* 0110 */ V(4, 15, 3),
/* 0111 */ V(4, 15, 3),
/* 1000 */ V(15, 4, 3),
/* 1001 */ V(15, 4, 3),
/* 1010 */ V(3, 15, 3),
/* 1011 */ V(3, 15, 3),
/* 1100 */ V(15, 3, 3),
/* 1101 */ V(15, 3, 3),
/* 1110 */ V(13, 8, 3),
/* 1111 */ V(13, 8, 3),
/* 0000 0100 ... */
/* 0000 */ V(14, 6, 3), /* 184 */
/* 0001 */ V(14, 6, 3),
/* 0010 */ V(2, 15, 3),
/* 0011 */ V(2, 15, 3),
/* 0100 */ V(15, 2, 3),
/* 0101 */ V(15, 2, 3),
/* 0110 */ V(6, 14, 4),
/* 0111 */ V(15, 0, 4),
/* 1000 */ V(1, 15, 3),
/* 1001 */ V(1, 15, 3),
/* 1010 */ V(15, 1, 3),
/* 1011 */ V(15, 1, 3),
/* 1100 */ V(9, 12, 3),
/* 1101 */ V(9, 12, 3),
/* 1110 */ V(12, 9, 3),
/* 1111 */ V(12, 9, 3),
/* 0000 0101 ... */
/* 000 */ V(5, 14, 3), /* 200 */
/* 001 */ V(10, 11, 3),
/* 010 */ V(11, 10, 3),
/* 011 */ V(14, 5, 3),
/* 100 */ V(7, 13, 3),
/* 101 */ V(13, 7, 3),
/* 110 */ V(4, 14, 3),
/* 111 */ V(14, 4, 3),
/* 0000 0110 ... */
/* 000 */ V(8, 12, 3), /* 208 */
/* 001 */ V(12, 8, 3),
/* 010 */ V(3, 14, 3),
/* 011 */ V(6, 13, 3),
/* 100 */ V(13, 6, 3),
/* 101 */ V(14, 3, 3),
/* 110 */ V(9, 11, 3),
/* 111 */ V(11, 9, 3),
/* 0000 0111 ... */
/* 0000 */ V(2, 14, 3), /* 216 */
/* 0001 */ V(2, 14, 3),
/* 0010 */ V(10, 10, 3),
/* 0011 */ V(10, 10, 3),
/* 0100 */ V(14, 2, 3),
/* 0101 */ V(14, 2, 3),
/* 0110 */ V(1, 14, 3),
/* 0111 */ V(1, 14, 3),
/* 1000 */ V(14, 1, 3),
/* 1001 */ V(14, 1, 3),
/* 1010 */ V(0, 14, 4),
/* 1011 */ V(14, 0, 4),
/* 1100 */ V(5, 13, 3),
/* 1101 */ V(5, 13, 3),
/* 1110 */ V(13, 5, 3),
/* 1111 */ V(13, 5, 3),
/* 0000 1000 ... */
/* 000 */ V(7, 12, 3), /* 232 */
/* 001 */ V(12, 7, 3),
/* 010 */ V(4, 13, 3),
/* 011 */ V(8, 11, 3),
/* 100 */ V(13, 4, 2),
/* 101 */ V(13, 4, 2),
/* 110 */ V(11, 8, 3),
/* 111 */ V(9, 10, 3),
/* 0000 1001 ... */
/* 000 */ V(10, 9, 3), /* 240 */
/* 001 */ V(6, 12, 3),
/* 010 */ V(12, 6, 3),
/* 011 */ V(3, 13, 3),
/* 100 */ V(13, 3, 2),
/* 101 */ V(13, 3, 2),
/* 110 */ V(13, 2, 2),
/* 111 */ V(13, 2, 2),
/* 0000 1010 ... */
/* 000 */ V(2, 13, 3), /* 248 */
/* 001 */ V(0, 13, 3),
/* 010 */ V(1, 13, 2),
/* 011 */ V(1, 13, 2),
/* 100 */ V(7, 11, 2),
/* 101 */ V(7, 11, 2),
/* 110 */ V(11, 7, 2),
/* 111 */ V(11, 7, 2),
/* 0000 1011 ... */
/* 000 */ V(13, 1, 2), /* 256 */
/* 001 */ V(13, 1, 2),
/* 010 */ V(5, 12, 3),
/* 011 */ V(13, 0, 3),
/* 100 */ V(12, 5, 2),
/* 101 */ V(12, 5, 2),
/* 110 */ V(8, 10, 2),
/* 111 */ V(8, 10, 2),
/* 0000 1100 ... */
/* 00 */ V(10, 8, 2), /* 264 */
/* 01 */ V(4, 12, 2),
/* 10 */ V(12, 4, 2),
/* 11 */ V(6, 11, 2),
/* 0000 1101 ... */
/* 000 */ V(11, 6, 2), /* 268 */
/* 001 */ V(11, 6, 2),
/* 010 */ V(9, 9, 3),
/* 011 */ V(0, 12, 3),
/* 100 */ V(3, 12, 2),
/* 101 */ V(3, 12, 2),
/* 110 */ V(12, 3, 2),
/* 111 */ V(12, 3, 2),
/* 0000 1110 ... */
/* 000 */ V(7, 10, 2), /* 276 */
/* 001 */ V(7, 10, 2),
/* 010 */ V(10, 7, 2),
/* 011 */ V(10, 7, 2),
/* 100 */ V(10, 6, 2),
/* 101 */ V(10, 6, 2),
/* 110 */ V(12, 0, 3),
/* 111 */ V(0, 11, 3),
/* 0000 1111 ... */
/* 00 */ V(12, 2, 1), /* 284 */
/* 01 */ V(12, 2, 1),
/* 10 */ V(2, 12, 2),
/* 11 */ V(5, 11, 2),
/* 0001 0000 ... */
/* 00 */ V(11, 5, 2), /* 288 */
/* 01 */ V(1, 12, 2),
/* 10 */ V(8, 9, 2),
/* 11 */ V(9, 8, 2),
/* 0001 0001 ... */
/* 00 */ V(12, 1, 2), /* 292 */
/* 01 */ V(4, 11, 2),
/* 10 */ V(11, 4, 2),
/* 11 */ V(6, 10, 2),
/* 0001 0010 ... */
/* 00 */ V(3, 11, 2), /* 296 */
/* 01 */ V(7, 9, 2),
/* 10 */ V(11, 3, 1),
/* 11 */ V(11, 3, 1),
/* 0001 0011 ... */
/* 00 */ V(9, 7, 2), /* 300 */
/* 01 */ V(8, 8, 2),
/* 10 */ V(2, 11, 2),
/* 11 */ V(5, 10, 2),
/* 0001 0100 ... */
/* 00 */ V(11, 2, 1), /* 304 */
/* 01 */ V(11, 2, 1),
/* 10 */ V(10, 5, 2),
/* 11 */ V(1, 11, 2),
/* 0001 0101 ... */
/* 00 */ V(11, 1, 1), /* 308 */
/* 01 */ V(11, 1, 1),
/* 10 */ V(11, 0, 2),
/* 11 */ V(6, 9, 2),
/* 0001 0110 ... */
/* 00 */ V(9, 6, 2), /* 312 */
/* 01 */ V(4, 10, 2),
/* 10 */ V(10, 4, 2),
/* 11 */ V(7, 8, 2),
/* 0001 0111 ... */
/* 00 */ V(8, 7, 2), /* 316 */
/* 01 */ V(3, 10, 2),
/* 10 */ V(10, 3, 1),
/* 11 */ V(10, 3, 1),
/* 0001 1000 ... */
/* 0 */ V(5, 9, 1), /* 320 */
/* 1 */ V(9, 5, 1),
/* 0001 1001 ... */
/* 0 */ V(2, 10, 1), /* 322 */
/* 1 */ V(10, 2, 1),
/* 0001 1010 ... */
/* 0 */ V(1, 10, 1), /* 324 */
/* 1 */ V(10, 1, 1),
/* 0001 1011 ... */
/* 00 */ V(0, 10, 2), /* 326 */
/* 01 */ V(10, 0, 2),
/* 10 */ V(6, 8, 1),
/* 11 */ V(6, 8, 1),
/* 0001 1100 ... */
/* 0 */ V(8, 6, 1), /* 330 */
/* 1 */ V(4, 9, 1),
/* 0001 1101 ... */
/* 0 */ V(9, 4, 1), /* 332 */
/* 1 */ V(3, 9, 1),
/* 0001 1110 ... */
/* 00 */ V(9, 3, 1), /* 334 */
/* 01 */ V(9, 3, 1),
/* 10 */ V(7, 7, 2),
/* 11 */ V(0, 9, 2),
/* 0001 1111 ... */
/* 0 */ V(5, 8, 1), /* 338 */
/* 1 */ V(8, 5, 1),
/* 0010 0000 ... */
/* 0 */ V(2, 9, 1), /* 340 */
/* 1 */ V(6, 7, 1),
/* 0010 0001 ... */
/* 0 */ V(7, 6, 1), /* 342 */
/* 1 */ V(9, 2, 1),
/* 0010 0011 ... */
/* 0 */ V(1, 9, 1), /* 344 */
/* 1 */ V(9, 0, 1),
/* 0010 0100 ... */
/* 0 */ V(4, 8, 1), /* 346 */
/* 1 */ V(8, 4, 1),
/* 0010 0101 ... */
/* 0 */ V(5, 7, 1), /* 348 */
/* 1 */ V(7, 5, 1),
/* 0010 0110 ... */
/* 0 */ V(3, 8, 1), /* 350 */
/* 1 */ V(8, 3, 1),
/* 0010 0111 ... */
/* 0 */ V(6, 6, 1), /* 352 */
/* 1 */ V(4, 7, 1),
/* 0010 1100 ... */
/* 0 */ V(7, 4, 1), /* 354 */
/* 1 */ V(0, 8, 1),
/* 0010 1101 ... */
/* 0 */ V(8, 0, 1), /* 356 */
/* 1 */ V(5, 6, 1),
/* 0010 1110 ... */
/* 0 */ V(6, 5, 1), /* 358 */
/* 1 */ V(3, 7, 1),
/* 0010 1111 ... */
/* 0 */ V(7, 3, 1), /* 360 */
/* 1 */ V(4, 6, 1),
/* 0011 0110 ... */
/* 0 */ V(0, 7, 1), /* 362 */
/* 1 */ V(7, 0, 1),
/* 0011 1110 ... */
/* 0 */ V(0, 6, 1), /* 364 */
/* 1 */ V(6, 0, 1),
/* 0000 0000 0000 ... */
/* 0 */ V(15, 15, 1), /* 366 */
/* 1 */ V(14, 15, 1),
/* 0000 0000 0001 ... */
/* 0 */ V(15, 14, 1), /* 368 */
/* 1 */ V(13, 15, 1),
/* 0000 0000 0011 ... */
/* 0 */ V(15, 13, 1), /* 370 */
/* 1 */ V(12, 15, 1),
/* 0000 0000 0100 ... */
/* 0 */ V(15, 12, 1), /* 372 */
/* 1 */ V(13, 14, 1),
/* 0000 0000 0101 ... */
/* 0 */ V(14, 13, 1), /* 374 */
/* 1 */ V(11, 15, 1),
/* 0000 0000 0111 ... */
/* 0 */ V(12, 14, 1), /* 376 */
/* 1 */ V(14, 12, 1),
/* 0000 0001 1111 ... */
/* 0 */ V(10, 14, 1), /* 378 */
/* 1 */ V(0, 15, 1)
];
const hufftab16 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 4),
/* 0011 */ PTR(64, 2),
/* 0100 */ V(1, 1, 4),
/* 0101 */ V(0, 1, 4),
/* 0110 */ V(1, 0, 3),
/* 0111 */ V(1, 0, 3),
/* 1000 */ V(0, 0, 1),
/* 1001 */ V(0, 0, 1),
/* 1010 */ V(0, 0, 1),
/* 1011 */ V(0, 0, 1),
/* 1100 */ V(0, 0, 1),
/* 1101 */ V(0, 0, 1),
/* 1110 */ V(0, 0, 1),
/* 1111 */ V(0, 0, 1),
/* 0000 ... */
/* 0000 */ PTR(68, 3), /* 16 */
/* 0001 */ PTR(76, 3),
/* 0010 */ PTR(84, 2),
/* 0011 */ V(15, 15, 4),
/* 0100 */ PTR(88, 2),
/* 0101 */ PTR(92, 1),
/* 0110 */ PTR(94, 4),
/* 0111 */ V(15, 2, 4),
/* 1000 */ PTR(110, 1),
/* 1001 */ V(1, 15, 4),
/* 1010 */ V(15, 1, 4),
/* 1011 */ PTR(112, 4),
/* 1100 */ PTR(128, 4),
/* 1101 */ PTR(144, 4),
/* 1110 */ PTR(160, 4),
/* 1111 */ PTR(176, 4),
/* 0001 ... */
/* 0000 */ PTR(192, 4), /* 32 */
/* 0001 */ PTR(208, 3),
/* 0010 */ PTR(216, 3),
/* 0011 */ PTR(224, 3),
/* 0100 */ PTR(232, 3),
/* 0101 */ PTR(240, 3),
/* 0110 */ PTR(248, 3),
/* 0111 */ PTR(256, 3),
/* 1000 */ PTR(264, 2),
/* 1001 */ PTR(268, 2),
/* 1010 */ PTR(272, 1),
/* 1011 */ PTR(274, 2),
/* 1100 */ PTR(278, 2),
/* 1101 */ PTR(282, 1),
/* 1110 */ V(5, 1, 4),
/* 1111 */ PTR(284, 1),
/* 0010 ... */
/* 0000 */ PTR(286, 1), /* 48 */
/* 0001 */ PTR(288, 1),
/* 0010 */ PTR(290, 1),
/* 0011 */ V(1, 4, 4),
/* 0100 */ V(4, 1, 4),
/* 0101 */ PTR(292, 1),
/* 0110 */ V(2, 3, 4),
/* 0111 */ V(3, 2, 4),
/* 1000 */ V(1, 3, 3),
/* 1001 */ V(1, 3, 3),
/* 1010 */ V(3, 1, 3),
/* 1011 */ V(3, 1, 3),
/* 1100 */ V(0, 3, 4),
/* 1101 */ V(3, 0, 4),
/* 1110 */ V(2, 2, 3),
/* 1111 */ V(2, 2, 3),
/* 0011 ... */
/* 00 */ V(1, 2, 2), /* 64 */
/* 01 */ V(2, 1, 2),
/* 10 */ V(0, 2, 2),
/* 11 */ V(2, 0, 2),
/* 0000 0000 ... */
/* 000 */ V(14, 15, 3), /* 68 */
/* 001 */ V(15, 14, 3),
/* 010 */ V(13, 15, 3),
/* 011 */ V(15, 13, 3),
/* 100 */ V(12, 15, 3),
/* 101 */ V(15, 12, 3),
/* 110 */ V(11, 15, 3),
/* 111 */ V(15, 11, 3),
/* 0000 0001 ... */
/* 000 */ V(10, 15, 2), /* 76 */
/* 001 */ V(10, 15, 2),
/* 010 */ V(15, 10, 3),
/* 011 */ V(9, 15, 3),
/* 100 */ V(15, 9, 3),
/* 101 */ V(15, 8, 3),
/* 110 */ V(8, 15, 2),
/* 111 */ V(8, 15, 2),
/* 0000 0010 ... */
/* 00 */ V(7, 15, 2), /* 84 */
/* 01 */ V(15, 7, 2),
/* 10 */ V(6, 15, 2),
/* 11 */ V(15, 6, 2),
/* 0000 0100 ... */
/* 00 */ V(5, 15, 2), /* 88 */
/* 01 */ V(15, 5, 2),
/* 10 */ V(4, 15, 1),
/* 11 */ V(4, 15, 1),
/* 0000 0101 ... */
/* 0 */ V(15, 4, 1), /* 92 */
/* 1 */ V(15, 3, 1),
/* 0000 0110 ... */
/* 0000 */ V(15, 0, 1), /* 94 */
/* 0001 */ V(15, 0, 1),
/* 0010 */ V(15, 0, 1),
/* 0011 */ V(15, 0, 1),
/* 0100 */ V(15, 0, 1),
/* 0101 */ V(15, 0, 1),
/* 0110 */ V(15, 0, 1),
/* 0111 */ V(15, 0, 1),
/* 1000 */ V(3, 15, 2),
/* 1001 */ V(3, 15, 2),
/* 1010 */ V(3, 15, 2),
/* 1011 */ V(3, 15, 2),
/* 1100 */ PTR(294, 4),
/* 1101 */ PTR(310, 3),
/* 1110 */ PTR(318, 3),
/* 1111 */ PTR(326, 3),
/* 0000 1000 ... */
/* 0 */ V(2, 15, 1), /* 110 */
/* 1 */ V(0, 15, 1),
/* 0000 1011 ... */
/* 0000 */ PTR(334, 2), /* 112 */
/* 0001 */ PTR(338, 2),
/* 0010 */ PTR(342, 2),
/* 0011 */ PTR(346, 1),
/* 0100 */ PTR(348, 2),
/* 0101 */ PTR(352, 2),
/* 0110 */ PTR(356, 1),
/* 0111 */ PTR(358, 2),
/* 1000 */ PTR(362, 2),
/* 1001 */ PTR(366, 2),
/* 1010 */ PTR(370, 2),
/* 1011 */ V(14, 3, 4),
/* 1100 */ PTR(374, 1),
/* 1101 */ PTR(376, 1),
/* 1110 */ PTR(378, 1),
/* 1111 */ PTR(380, 1),
/* 0000 1100 ... */
/* 0000 */ PTR(382, 1), /* 128 */
/* 0001 */ PTR(384, 1),
/* 0010 */ PTR(386, 1),
/* 0011 */ V(0, 13, 4),
/* 0100 */ PTR(388, 1),
/* 0101 */ PTR(390, 1),
/* 0110 */ PTR(392, 1),
/* 0111 */ V(3, 12, 4),
/* 1000 */ PTR(394, 1),
/* 1001 */ V(1, 12, 4),
/* 1010 */ V(12, 0, 4),
/* 1011 */ PTR(396, 1),
/* 1100 */ V(14, 2, 3),
/* 1101 */ V(14, 2, 3),
/* 1110 */ V(2, 14, 4),
/* 1111 */ V(1, 14, 4),
/* 0000 1101 ... */
/* 0000 */ V(13, 3, 4), /* 144 */
/* 0001 */ V(2, 13, 4),
/* 0010 */ V(13, 2, 4),
/* 0011 */ V(13, 1, 4),
/* 0100 */ V(3, 11, 4),
/* 0101 */ PTR(398, 1),
/* 0110 */ V(1, 13, 3),
/* 0111 */ V(1, 13, 3),
/* 1000 */ V(12, 4, 4),
/* 1001 */ V(6, 11, 4),
/* 1010 */ V(12, 3, 4),
/* 1011 */ V(10, 7, 4),
/* 1100 */ V(2, 12, 3),
/* 1101 */ V(2, 12, 3),
/* 1110 */ V(12, 2, 4),
/* 1111 */ V(11, 5, 4),
/* 0000 1110 ... */
/* 0000 */ V(12, 1, 4), /* 160 */
/* 0001 */ V(0, 12, 4),
/* 0010 */ V(4, 11, 4),
/* 0011 */ V(11, 4, 4),
/* 0100 */ V(6, 10, 4),
/* 0101 */ V(10, 6, 4),
/* 0110 */ V(11, 3, 3),
/* 0111 */ V(11, 3, 3),
/* 1000 */ V(5, 10, 4),
/* 1001 */ V(10, 5, 4),
/* 1010 */ V(2, 11, 3),
/* 1011 */ V(2, 11, 3),
/* 1100 */ V(11, 2, 3),
/* 1101 */ V(11, 2, 3),
/* 1110 */ V(1, 11, 3),
/* 1111 */ V(1, 11, 3),
/* 0000 1111 ... */
/* 0000 */ V(11, 1, 3), /* 176 */
/* 0001 */ V(11, 1, 3),
/* 0010 */ V(0, 11, 4),
/* 0011 */ V(11, 0, 4),
/* 0100 */ V(6, 9, 4),
/* 0101 */ V(9, 6, 4),
/* 0110 */ V(4, 10, 4),
/* 0111 */ V(10, 4, 4),
/* 1000 */ V(7, 8, 4),
/* 1001 */ V(8, 7, 4),
/* 1010 */ V(10, 3, 3),
/* 1011 */ V(10, 3, 3),
/* 1100 */ V(3, 10, 4),
/* 1101 */ V(5, 9, 4),
/* 1110 */ V(2, 10, 3),
/* 1111 */ V(2, 10, 3),
/* 0001 0000 ... */
/* 0000 */ V(9, 5, 4), /* 192 */
/* 0001 */ V(6, 8, 4),
/* 0010 */ V(10, 1, 3),
/* 0011 */ V(10, 1, 3),
/* 0100 */ V(8, 6, 4),
/* 0101 */ V(7, 7, 4),
/* 0110 */ V(9, 4, 3),
/* 0111 */ V(9, 4, 3),
/* 1000 */ V(4, 9, 4),
/* 1001 */ V(5, 7, 4),
/* 1010 */ V(6, 7, 3),
/* 1011 */ V(6, 7, 3),
/* 1100 */ V(10, 2, 2),
/* 1101 */ V(10, 2, 2),
/* 1110 */ V(10, 2, 2),
/* 1111 */ V(10, 2, 2),
/* 0001 0001 ... */
/* 000 */ V(1, 10, 2), /* 208 */
/* 001 */ V(1, 10, 2),
/* 010 */ V(0, 10, 3),
/* 011 */ V(10, 0, 3),
/* 100 */ V(3, 9, 3),
/* 101 */ V(9, 3, 3),
/* 110 */ V(5, 8, 3),
/* 111 */ V(8, 5, 3),
/* 0001 0010 ... */
/* 000 */ V(2, 9, 2), /* 216 */
/* 001 */ V(2, 9, 2),
/* 010 */ V(9, 2, 2),
/* 011 */ V(9, 2, 2),
/* 100 */ V(7, 6, 3),
/* 101 */ V(0, 9, 3),
/* 110 */ V(1, 9, 2),
/* 111 */ V(1, 9, 2),
/* 0001 0011 ... */
/* 000 */ V(9, 1, 2), /* 224 */
/* 001 */ V(9, 1, 2),
/* 010 */ V(9, 0, 3),
/* 011 */ V(4, 8, 3),
/* 100 */ V(8, 4, 3),
/* 101 */ V(7, 5, 3),
/* 110 */ V(3, 8, 3),
/* 111 */ V(8, 3, 3),
/* 0001 0100 ... */
/* 000 */ V(6, 6, 3), /* 232 */
/* 001 */ V(2, 8, 3),
/* 010 */ V(8, 2, 2),
/* 011 */ V(8, 2, 2),
/* 100 */ V(4, 7, 3),
/* 101 */ V(7, 4, 3),
/* 110 */ V(1, 8, 2),
/* 111 */ V(1, 8, 2),
/* 0001 0101 ... */
/* 000 */ V(8, 1, 2), /* 240 */
/* 001 */ V(8, 1, 2),
/* 010 */ V(8, 0, 2),
/* 011 */ V(8, 0, 2),
/* 100 */ V(0, 8, 3),
/* 101 */ V(5, 6, 3),
/* 110 */ V(3, 7, 2),
/* 111 */ V(3, 7, 2),
/* 0001 0110 ... */
/* 000 */ V(7, 3, 2), /* 248 */
/* 001 */ V(7, 3, 2),
/* 010 */ V(6, 5, 3),
/* 011 */ V(4, 6, 3),
/* 100 */ V(2, 7, 2),
/* 101 */ V(2, 7, 2),
/* 110 */ V(7, 2, 2),
/* 111 */ V(7, 2, 2),
/* 0001 0111 ... */
/* 000 */ V(6, 4, 3), /* 256 */
/* 001 */ V(5, 5, 3),
/* 010 */ V(0, 7, 2),
/* 011 */ V(0, 7, 2),
/* 100 */ V(1, 7, 1),
/* 101 */ V(1, 7, 1),
/* 110 */ V(1, 7, 1),
/* 111 */ V(1, 7, 1),
/* 0001 1000 ... */
/* 00 */ V(7, 1, 1), /* 264 */
/* 01 */ V(7, 1, 1),
/* 10 */ V(7, 0, 2),
/* 11 */ V(3, 6, 2),
/* 0001 1001 ... */
/* 00 */ V(6, 3, 2), /* 268 */
/* 01 */ V(4, 5, 2),
/* 10 */ V(5, 4, 2),
/* 11 */ V(2, 6, 2),
/* 0001 1010 ... */
/* 0 */ V(6, 2, 1), /* 272 */
/* 1 */ V(1, 6, 1),
/* 0001 1011 ... */
/* 00 */ V(6, 1, 1), /* 274 */
/* 01 */ V(6, 1, 1),
/* 10 */ V(0, 6, 2),
/* 11 */ V(6, 0, 2),
/* 0001 1100 ... */
/* 00 */ V(5, 3, 1), /* 278 */
/* 01 */ V(5, 3, 1),
/* 10 */ V(3, 5, 2),
/* 11 */ V(4, 4, 2),
/* 0001 1101 ... */
/* 0 */ V(2, 5, 1), /* 282 */
/* 1 */ V(5, 2, 1),
/* 0001 1111 ... */
/* 0 */ V(1, 5, 1), /* 284 */
/* 1 */ V(0, 5, 1),
/* 0010 0000 ... */
/* 0 */ V(3, 4, 1), /* 286 */
/* 1 */ V(4, 3, 1),
/* 0010 0001 ... */
/* 0 */ V(5, 0, 1), /* 288 */
/* 1 */ V(2, 4, 1),
/* 0010 0010 ... */
/* 0 */ V(4, 2, 1), /* 290 */
/* 1 */ V(3, 3, 1),
/* 0010 0101 ... */
/* 0 */ V(0, 4, 1), /* 292 */
/* 1 */ V(4, 0, 1),
/* 0000 0110 1100 ... */
/* 0000 */ V(12, 14, 4), /* 294 */
/* 0001 */ PTR(400, 1),
/* 0010 */ V(13, 14, 3),
/* 0011 */ V(13, 14, 3),
/* 0100 */ V(14, 9, 3),
/* 0101 */ V(14, 9, 3),
/* 0110 */ V(14, 10, 4),
/* 0111 */ V(13, 9, 4),
/* 1000 */ V(14, 14, 2),
/* 1001 */ V(14, 14, 2),
/* 1010 */ V(14, 14, 2),
/* 1011 */ V(14, 14, 2),
/* 1100 */ V(14, 13, 3),
/* 1101 */ V(14, 13, 3),
/* 1110 */ V(14, 11, 3),
/* 1111 */ V(14, 11, 3),
/* 0000 0110 1101 ... */
/* 000 */ V(11, 14, 2), /* 310 */
/* 001 */ V(11, 14, 2),
/* 010 */ V(12, 13, 2),
/* 011 */ V(12, 13, 2),
/* 100 */ V(13, 12, 3),
/* 101 */ V(13, 11, 3),
/* 110 */ V(10, 14, 2),
/* 111 */ V(10, 14, 2),
/* 0000 0110 1110 ... */
/* 000 */ V(12, 12, 2), /* 318 */
/* 001 */ V(12, 12, 2),
/* 010 */ V(10, 13, 3),
/* 011 */ V(13, 10, 3),
/* 100 */ V(7, 14, 3),
/* 101 */ V(10, 12, 3),
/* 110 */ V(12, 10, 2),
/* 111 */ V(12, 10, 2),
/* 0000 0110 1111 ... */
/* 000 */ V(12, 9, 3), /* 326 */
/* 001 */ V(7, 13, 3),
/* 010 */ V(5, 14, 2),
/* 011 */ V(5, 14, 2),
/* 100 */ V(11, 13, 1),
/* 101 */ V(11, 13, 1),
/* 110 */ V(11, 13, 1),
/* 111 */ V(11, 13, 1),
/* 0000 1011 0000 ... */
/* 00 */ V(9, 14, 1), /* 334 */
/* 01 */ V(9, 14, 1),
/* 10 */ V(11, 12, 2),
/* 11 */ V(12, 11, 2),
/* 0000 1011 0001 ... */
/* 00 */ V(8, 14, 2), /* 338 */
/* 01 */ V(14, 8, 2),
/* 10 */ V(9, 13, 2),
/* 11 */ V(14, 7, 2),
/* 0000 1011 0010 ... */
/* 00 */ V(11, 11, 2), /* 342 */
/* 01 */ V(8, 13, 2),
/* 10 */ V(13, 8, 2),
/* 11 */ V(6, 14, 2),
/* 0000 1011 0011 ... */
/* 0 */ V(14, 6, 1), /* 346 */
/* 1 */ V(9, 12, 1),
/* 0000 1011 0100 ... */
/* 00 */ V(10, 11, 2), /* 348 */
/* 01 */ V(11, 10, 2),
/* 10 */ V(14, 5, 2),
/* 11 */ V(13, 7, 2),
/* 0000 1011 0101 ... */
/* 00 */ V(4, 14, 1), /* 352 */
/* 01 */ V(4, 14, 1),
/* 10 */ V(14, 4, 2),
/* 11 */ V(8, 12, 2),
/* 0000 1011 0110 ... */
/* 0 */ V(12, 8, 1), /* 356 */
/* 1 */ V(3, 14, 1),
/* 0000 1011 0111 ... */
/* 00 */ V(6, 13, 1), /* 358 */
/* 01 */ V(6, 13, 1),
/* 10 */ V(13, 6, 2),
/* 11 */ V(9, 11, 2),
/* 0000 1011 1000 ... */
/* 00 */ V(11, 9, 2), /* 362 */
/* 01 */ V(10, 10, 2),
/* 10 */ V(14, 1, 1),
/* 11 */ V(14, 1, 1),
/* 0000 1011 1001 ... */
/* 00 */ V(13, 4, 1), /* 366 */
/* 01 */ V(13, 4, 1),
/* 10 */ V(11, 8, 2),
/* 11 */ V(10, 9, 2),
/* 0000 1011 1010 ... */
/* 00 */ V(7, 11, 1), /* 370 */
/* 01 */ V(7, 11, 1),
/* 10 */ V(11, 7, 2),
/* 11 */ V(13, 0, 2),
/* 0000 1011 1100 ... */
/* 0 */ V(0, 14, 1), /* 374 */
/* 1 */ V(14, 0, 1),
/* 0000 1011 1101 ... */
/* 0 */ V(5, 13, 1), /* 376 */
/* 1 */ V(13, 5, 1),
/* 0000 1011 1110 ... */
/* 0 */ V(7, 12, 1), /* 378 */
/* 1 */ V(12, 7, 1),
/* 0000 1011 1111 ... */
/* 0 */ V(4, 13, 1), /* 380 */
/* 1 */ V(8, 11, 1),
/* 0000 1100 0000 ... */
/* 0 */ V(9, 10, 1), /* 382 */
/* 1 */ V(6, 12, 1),
/* 0000 1100 0001 ... */
/* 0 */ V(12, 6, 1), /* 384 */
/* 1 */ V(3, 13, 1),
/* 0000 1100 0010 ... */
/* 0 */ V(5, 12, 1), /* 386 */
/* 1 */ V(12, 5, 1),
/* 0000 1100 0100 ... */
/* 0 */ V(8, 10, 1), /* 388 */
/* 1 */ V(10, 8, 1),
/* 0000 1100 0101 ... */
/* 0 */ V(9, 9, 1), /* 390 */
/* 1 */ V(4, 12, 1),
/* 0000 1100 0110 ... */
/* 0 */ V(11, 6, 1), /* 392 */
/* 1 */ V(7, 10, 1),
/* 0000 1100 1000 ... */
/* 0 */ V(5, 11, 1), /* 394 */
/* 1 */ V(8, 9, 1),
/* 0000 1100 1011 ... */
/* 0 */ V(9, 8, 1), /* 396 */
/* 1 */ V(7, 9, 1),
/* 0000 1101 0101 ... */
/* 0 */ V(9, 7, 1), /* 398 */
/* 1 */ V(8, 8, 1),
/* 0000 0110 1100 0001 ... */
/* 0 */ V(14, 12, 1), /* 400 */
/* 1 */ V(13, 13, 1)
];
const hufftab24 = [
/* 0000 */ PTR(16, 4),
/* 0001 */ PTR(32, 4),
/* 0010 */ PTR(48, 4),
/* 0011 */ V(15, 15, 4),
/* 0100 */ PTR(64, 4),
/* 0101 */ PTR(80, 4),
/* 0110 */ PTR(96, 4),
/* 0111 */ PTR(112, 4),
/* 1000 */ PTR(128, 4),
/* 1001 */ PTR(144, 4),
/* 1010 */ PTR(160, 3),
/* 1011 */ PTR(168, 2),
/* 1100 */ V(1, 1, 4),
/* 1101 */ V(0, 1, 4),
/* 1110 */ V(1, 0, 4),
/* 1111 */ V(0, 0, 4),
/* 0000 ... */
/* 0000 */ V(14, 15, 4), /* 16 */
/* 0001 */ V(15, 14, 4),
/* 0010 */ V(13, 15, 4),
/* 0011 */ V(15, 13, 4),
/* 0100 */ V(12, 15, 4),
/* 0101 */ V(15, 12, 4),
/* 0110 */ V(11, 15, 4),
/* 0111 */ V(15, 11, 4),
/* 1000 */ V(15, 10, 3),
/* 1001 */ V(15, 10, 3),
/* 1010 */ V(10, 15, 4),
/* 1011 */ V(9, 15, 4),
/* 1100 */ V(15, 9, 3),
/* 1101 */ V(15, 9, 3),
/* 1110 */ V(15, 8, 3),
/* 1111 */ V(15, 8, 3),
/* 0001 ... */
/* 0000 */ V(8, 15, 4), /* 32 */
/* 0001 */ V(7, 15, 4),
/* 0010 */ V(15, 7, 3),
/* 0011 */ V(15, 7, 3),
/* 0100 */ V(6, 15, 3),
/* 0101 */ V(6, 15, 3),
/* 0110 */ V(15, 6, 3),
/* 0111 */ V(15, 6, 3),
/* 1000 */ V(5, 15, 3),
/* 1001 */ V(5, 15, 3),
/* 1010 */ V(15, 5, 3),
/* 1011 */ V(15, 5, 3),
/* 1100 */ V(4, 15, 3),
/* 1101 */ V(4, 15, 3),
/* 1110 */ V(15, 4, 3),
/* 1111 */ V(15, 4, 3),
/* 0010 ... */
/* 0000 */ V(3, 15, 3), /* 48 */
/* 0001 */ V(3, 15, 3),
/* 0010 */ V(15, 3, 3),
/* 0011 */ V(15, 3, 3),
/* 0100 */ V(2, 15, 3),
/* 0101 */ V(2, 15, 3),
/* 0110 */ V(15, 2, 3),
/* 0111 */ V(15, 2, 3),
/* 1000 */ V(15, 1, 3),
/* 1001 */ V(15, 1, 3),
/* 1010 */ V(1, 15, 4),
/* 1011 */ V(15, 0, 4),
/* 1100 */ PTR(172, 3),
/* 1101 */ PTR(180, 3),
/* 1110 */ PTR(188, 3),
/* 1111 */ PTR(196, 3),
/* 0100 ... */
/* 0000 */ PTR(204, 4), /* 64 */
/* 0001 */ PTR(220, 3),
/* 0010 */ PTR(228, 3),
/* 0011 */ PTR(236, 3),
/* 0100 */ PTR(244, 2),
/* 0101 */ PTR(248, 2),
/* 0110 */ PTR(252, 2),
/* 0111 */ PTR(256, 2),
/* 1000 */ PTR(260, 2),
/* 1001 */ PTR(264, 2),
/* 1010 */ PTR(268, 2),
/* 1011 */ PTR(272, 2),
/* 1100 */ PTR(276, 2),
/* 1101 */ PTR(280, 3),
/* 1110 */ PTR(288, 2),
/* 1111 */ PTR(292, 2),
/* 0101 ... */
/* 0000 */ PTR(296, 2), /* 80 */
/* 0001 */ PTR(300, 3),
/* 0010 */ PTR(308, 2),
/* 0011 */ PTR(312, 3),
/* 0100 */ PTR(320, 1),
/* 0101 */ PTR(322, 2),
/* 0110 */ PTR(326, 2),
/* 0111 */ PTR(330, 1),
/* 1000 */ PTR(332, 2),
/* 1001 */ PTR(336, 1),
/* 1010 */ PTR(338, 1),
/* 1011 */ PTR(340, 1),
/* 1100 */ PTR(342, 1),
/* 1101 */ PTR(344, 1),
/* 1110 */ PTR(346, 1),
/* 1111 */ PTR(348, 1),
/* 0110 ... */
/* 0000 */ PTR(350, 1), /* 96 */
/* 0001 */ PTR(352, 1),
/* 0010 */ PTR(354, 1),
/* 0011 */ PTR(356, 1),
/* 0100 */ PTR(358, 1),
/* 0101 */ PTR(360, 1),
/* 0110 */ PTR(362, 1),
/* 0111 */ PTR(364, 1),
/* 1000 */ PTR(366, 1),
/* 1001 */ PTR(368, 1),
/* 1010 */ PTR(370, 2),
/* 1011 */ PTR(374, 1),
/* 1100 */ PTR(376, 2),
/* 1101 */ V(7, 3, 4),
/* 1110 */ PTR(380, 1),
/* 1111 */ V(7, 2, 4),
/* 0111 ... */
/* 0000 */ V(4, 6, 4), /* 112 */
/* 0001 */ V(6, 4, 4),
/* 0010 */ V(5, 5, 4),
/* 0011 */ V(7, 1, 4),
/* 0100 */ V(3, 6, 4),
/* 0101 */ V(6, 3, 4),
/* 0110 */ V(4, 5, 4),
/* 0111 */ V(5, 4, 4),
/* 1000 */ V(2, 6, 4),
/* 1001 */ V(6, 2, 4),
/* 1010 */ V(1, 6, 4),
/* 1011 */ V(6, 1, 4),
/* 1100 */ PTR(382, 1),
/* 1101 */ V(3, 5, 4),
/* 1110 */ V(5, 3, 4),
/* 1111 */ V(4, 4, 4),
/* 1000 ... */
/* 0000 */ V(2, 5, 4), /* 128 */
/* 0001 */ V(5, 2, 4),
/* 0010 */ V(1, 5, 4),
/* 0011 */ PTR(384, 1),
/* 0100 */ V(5, 1, 3),
/* 0101 */ V(5, 1, 3),
/* 0110 */ V(3, 4, 4),
/* 0111 */ V(4, 3, 4),
/* 1000 */ V(2, 4, 3),
/* 1001 */ V(2, 4, 3),
/* 1010 */ V(4, 2, 3),
/* 1011 */ V(4, 2, 3),
/* 1100 */ V(3, 3, 3),
/* 1101 */ V(3, 3, 3),
/* 1110 */ V(1, 4, 3),
/* 1111 */ V(1, 4, 3),
/* 1001 ... */
/* 0000 */ V(4, 1, 3), /* 144 */
/* 0001 */ V(4, 1, 3),
/* 0010 */ V(0, 4, 4),
/* 0011 */ V(4, 0, 4),
/* 0100 */ V(2, 3, 3),
/* 0101 */ V(2, 3, 3),
/* 0110 */ V(3, 2, 3),
/* 0111 */ V(3, 2, 3),
/* 1000 */ V(1, 3, 2),
/* 1001 */ V(1, 3, 2),
/* 1010 */ V(1, 3, 2),
/* 1011 */ V(1, 3, 2),
/* 1100 */ V(3, 1, 2),
/* 1101 */ V(3, 1, 2),
/* 1110 */ V(3, 1, 2),
/* 1111 */ V(3, 1, 2),
/* 1010 ... */
/* 000 */ V(0, 3, 3), /* 160 */
/* 001 */ V(3, 0, 3),
/* 010 */ V(2, 2, 2),
/* 011 */ V(2, 2, 2),
/* 100 */ V(1, 2, 1),
/* 101 */ V(1, 2, 1),
/* 110 */ V(1, 2, 1),
/* 111 */ V(1, 2, 1),
/* 1011 ... */
/* 00 */ V(2, 1, 1), /* 168 */
/* 01 */ V(2, 1, 1),
/* 10 */ V(0, 2, 2),
/* 11 */ V(2, 0, 2),
/* 0010 1100 ... */
/* 000 */ V(0, 15, 1), /* 172 */
/* 001 */ V(0, 15, 1),
/* 010 */ V(0, 15, 1),
/* 011 */ V(0, 15, 1),
/* 100 */ V(14, 14, 3),
/* 101 */ V(13, 14, 3),
/* 110 */ V(14, 13, 3),
/* 111 */ V(12, 14, 3),
/* 0010 1101 ... */
/* 000 */ V(14, 12, 3), /* 180 */
/* 001 */ V(13, 13, 3),
/* 010 */ V(11, 14, 3),
/* 011 */ V(14, 11, 3),
/* 100 */ V(12, 13, 3),
/* 101 */ V(13, 12, 3),
/* 110 */ V(10, 14, 3),
/* 111 */ V(14, 10, 3),
/* 0010 1110 ... */
/* 000 */ V(11, 13, 3), /* 188 */
/* 001 */ V(13, 11, 3),
/* 010 */ V(12, 12, 3),
/* 011 */ V(9, 14, 3),
/* 100 */ V(14, 9, 3),
/* 101 */ V(10, 13, 3),
/* 110 */ V(13, 10, 3),
/* 111 */ V(11, 12, 3),
/* 0010 1111 ... */
/* 000 */ V(12, 11, 3), /* 196 */
/* 001 */ V(8, 14, 3),
/* 010 */ V(14, 8, 3),
/* 011 */ V(9, 13, 3),
/* 100 */ V(13, 9, 3),
/* 101 */ V(7, 14, 3),
/* 110 */ V(14, 7, 3),
/* 111 */ V(10, 12, 3),
/* 0100 0000 ... */
/* 0000 */ V(12, 10, 3), /* 204 */
/* 0001 */ V(12, 10, 3),
/* 0010 */ V(11, 11, 3),
/* 0011 */ V(11, 11, 3),
/* 0100 */ V(8, 13, 3),
/* 0101 */ V(8, 13, 3),
/* 0110 */ V(13, 8, 3),
/* 0111 */ V(13, 8, 3),
/* 1000 */ V(0, 14, 4),
/* 1001 */ V(14, 0, 4),
/* 1010 */ V(0, 13, 3),
/* 1011 */ V(0, 13, 3),
/* 1100 */ V(14, 6, 2),
/* 1101 */ V(14, 6, 2),
/* 1110 */ V(14, 6, 2),
/* 1111 */ V(14, 6, 2),
/* 0100 0001 ... */
/* 000 */ V(6, 14, 3), /* 220 */
/* 001 */ V(9, 12, 3),
/* 010 */ V(12, 9, 2),
/* 011 */ V(12, 9, 2),
/* 100 */ V(5, 14, 2),
/* 101 */ V(5, 14, 2),
/* 110 */ V(11, 10, 2),
/* 111 */ V(11, 10, 2),
/* 0100 0010 ... */
/* 000 */ V(14, 5, 2), /* 228 */
/* 001 */ V(14, 5, 2),
/* 010 */ V(10, 11, 3),
/* 011 */ V(7, 13, 3),
/* 100 */ V(13, 7, 2),
/* 101 */ V(13, 7, 2),
/* 110 */ V(14, 4, 2),
/* 111 */ V(14, 4, 2),
/* 0100 0011 ... */
/* 000 */ V(8, 12, 2), /* 236 */
/* 001 */ V(8, 12, 2),
/* 010 */ V(12, 8, 2),
/* 011 */ V(12, 8, 2),
/* 100 */ V(4, 14, 3),
/* 101 */ V(2, 14, 3),
/* 110 */ V(3, 14, 2),
/* 111 */ V(3, 14, 2),
/* 0100 0100 ... */
/* 00 */ V(6, 13, 2), /* 244 */
/* 01 */ V(13, 6, 2),
/* 10 */ V(14, 3, 2),
/* 11 */ V(9, 11, 2),
/* 0100 0101 ... */
/* 00 */ V(11, 9, 2), /* 248 */
/* 01 */ V(10, 10, 2),
/* 10 */ V(14, 2, 2),
/* 11 */ V(1, 14, 2),
/* 0100 0110 ... */
/* 00 */ V(14, 1, 2), /* 252 */
/* 01 */ V(5, 13, 2),
/* 10 */ V(13, 5, 2),
/* 11 */ V(7, 12, 2),
/* 0100 0111 ... */
/* 00 */ V(12, 7, 2), /* 256 */
/* 01 */ V(4, 13, 2),
/* 10 */ V(8, 11, 2),
/* 11 */ V(11, 8, 2),
/* 0100 1000 ... */
/* 00 */ V(13, 4, 2), /* 260 */
/* 01 */ V(9, 10, 2),
/* 10 */ V(10, 9, 2),
/* 11 */ V(6, 12, 2),
/* 0100 1001 ... */
/* 00 */ V(12, 6, 2), /* 264 */
/* 01 */ V(3, 13, 2),
/* 10 */ V(13, 3, 2),
/* 11 */ V(2, 13, 2),
/* 0100 1010 ... */
/* 00 */ V(13, 2, 2), /* 268 */
/* 01 */ V(1, 13, 2),
/* 10 */ V(7, 11, 2),
/* 11 */ V(11, 7, 2),
/* 0100 1011 ... */
/* 00 */ V(13, 1, 2), /* 272 */
/* 01 */ V(5, 12, 2),
/* 10 */ V(12, 5, 2),
/* 11 */ V(8, 10, 2),
/* 0100 1100 ... */
/* 00 */ V(10, 8, 2), /* 276 */
/* 01 */ V(9, 9, 2),
/* 10 */ V(4, 12, 2),
/* 11 */ V(12, 4, 2),
/* 0100 1101 ... */
/* 000 */ V(6, 11, 2), /* 280 */
/* 001 */ V(6, 11, 2),
/* 010 */ V(11, 6, 2),
/* 011 */ V(11, 6, 2),
/* 100 */ V(13, 0, 3),
/* 101 */ V(0, 12, 3),
/* 110 */ V(3, 12, 2),
/* 111 */ V(3, 12, 2),
/* 0100 1110 ... */
/* 00 */ V(12, 3, 2), /* 288 */
/* 01 */ V(7, 10, 2),
/* 10 */ V(10, 7, 2),
/* 11 */ V(2, 12, 2),
/* 0100 1111 ... */
/* 00 */ V(12, 2, 2), /* 292 */
/* 01 */ V(5, 11, 2),
/* 10 */ V(11, 5, 2),
/* 11 */ V(1, 12, 2),
/* 0101 0000 ... */
/* 00 */ V(8, 9, 2), /* 296 */
/* 01 */ V(9, 8, 2),
/* 10 */ V(12, 1, 2),
/* 11 */ V(4, 11, 2),
/* 0101 0001 ... */
/* 000 */ V(12, 0, 3), /* 300 */
/* 001 */ V(0, 11, 3),
/* 010 */ V(3, 11, 2),
/* 011 */ V(3, 11, 2),
/* 100 */ V(11, 0, 3),
/* 101 */ V(0, 10, 3),
/* 110 */ V(1, 10, 2),
/* 111 */ V(1, 10, 2),
/* 0101 0010 ... */
/* 00 */ V(11, 4, 1), /* 308 */
/* 01 */ V(11, 4, 1),
/* 10 */ V(6, 10, 2),
/* 11 */ V(10, 6, 2),
/* 0101 0011 ... */
/* 000 */ V(7, 9, 2), /* 312 */
/* 001 */ V(7, 9, 2),
/* 010 */ V(9, 7, 2),
/* 011 */ V(9, 7, 2),
/* 100 */ V(10, 0, 3),
/* 101 */ V(0, 9, 3),
/* 110 */ V(9, 0, 2),
/* 111 */ V(9, 0, 2),
/* 0101 0100 ... */
/* 0 */ V(11, 3, 1), /* 320 */
/* 1 */ V(8, 8, 1),
/* 0101 0101 ... */
/* 00 */ V(2, 11, 2), /* 322 */
/* 01 */ V(5, 10, 2),
/* 10 */ V(11, 2, 1),
/* 11 */ V(11, 2, 1),
/* 0101 0110 ... */
/* 00 */ V(10, 5, 2), /* 326 */
/* 01 */ V(1, 11, 2),
/* 10 */ V(11, 1, 2),
/* 11 */ V(6, 9, 2),
/* 0101 0111 ... */
/* 0 */ V(9, 6, 1), /* 330 */
/* 1 */ V(10, 4, 1),
/* 0101 1000 ... */
/* 00 */ V(4, 10, 2), /* 332 */
/* 01 */ V(7, 8, 2),
/* 10 */ V(8, 7, 1),
/* 11 */ V(8, 7, 1),
/* 0101 1001 ... */
/* 0 */ V(3, 10, 1), /* 336 */
/* 1 */ V(10, 3, 1),
/* 0101 1010 ... */
/* 0 */ V(5, 9, 1), /* 338 */
/* 1 */ V(9, 5, 1),
/* 0101 1011 ... */
/* 0 */ V(2, 10, 1), /* 340 */
/* 1 */ V(10, 2, 1),
/* 0101 1100 ... */
/* 0 */ V(10, 1, 1), /* 342 */
/* 1 */ V(6, 8, 1),
/* 0101 1101 ... */
/* 0 */ V(8, 6, 1), /* 344 */
/* 1 */ V(7, 7, 1),
/* 0101 1110 ... */
/* 0 */ V(4, 9, 1), /* 346 */
/* 1 */ V(9, 4, 1),
/* 0101 1111 ... */
/* 0 */ V(3, 9, 1), /* 348 */
/* 1 */ V(9, 3, 1),
/* 0110 0000 ... */
/* 0 */ V(5, 8, 1), /* 350 */
/* 1 */ V(8, 5, 1),
/* 0110 0001 ... */
/* 0 */ V(2, 9, 1), /* 352 */
/* 1 */ V(6, 7, 1),
/* 0110 0010 ... */
/* 0 */ V(7, 6, 1), /* 354 */
/* 1 */ V(9, 2, 1),
/* 0110 0011 ... */
/* 0 */ V(1, 9, 1), /* 356 */
/* 1 */ V(9, 1, 1),
/* 0110 0100 ... */
/* 0 */ V(4, 8, 1), /* 358 */
/* 1 */ V(8, 4, 1),
/* 0110 0101 ... */
/* 0 */ V(5, 7, 1), /* 360 */
/* 1 */ V(7, 5, 1),
/* 0110 0110 ... */
/* 0 */ V(3, 8, 1), /* 362 */
/* 1 */ V(8, 3, 1),
/* 0110 0111 ... */
/* 0 */ V(6, 6, 1), /* 364 */
/* 1 */ V(2, 8, 1),
/* 0110 1000 ... */
/* 0 */ V(8, 2, 1), /* 366 */
/* 1 */ V(1, 8, 1),
/* 0110 1001 ... */
/* 0 */ V(4, 7, 1), /* 368 */
/* 1 */ V(7, 4, 1),
/* 0110 1010 ... */
/* 00 */ V(8, 1, 1), /* 370 */
/* 01 */ V(8, 1, 1),
/* 10 */ V(0, 8, 2),
/* 11 */ V(8, 0, 2),
/* 0110 1011 ... */
/* 0 */ V(5, 6, 1), /* 374 */
/* 1 */ V(6, 5, 1),
/* 0110 1100 ... */
/* 00 */ V(1, 7, 1), /* 376 */
/* 01 */ V(1, 7, 1),
/* 10 */ V(0, 7, 2),
/* 11 */ V(7, 0, 2),
/* 0110 1110 ... */
/* 0 */ V(3, 7, 1), /* 380 */
/* 1 */ V(2, 7, 1),
/* 0111 1100 ... */
/* 0 */ V(0, 6, 1), /* 382 */
/* 1 */ V(6, 0, 1),
/* 1000 0011 ... */
/* 0 */ V(0, 5, 1), /* 384 */
/* 1 */ V(5, 0, 1)
];
/* hufftable constructor */
function MP3Hufftable(table, linbits, startbits) {
this.table = table;
this.linbits = linbits;
this.startbits = startbits;
};
/* external tables */
exports.huff_quad_table = [ hufftabA, hufftabB ];
exports.huff_pair_table = [
/* 0 */ new MP3Hufftable(hufftab0, 0, 0),
/* 1 */ new MP3Hufftable(hufftab1, 0, 3),
/* 2 */ new MP3Hufftable(hufftab2, 0, 3),
/* 3 */ new MP3Hufftable(hufftab3, 0, 3),
/* 4 */ null, //new MP3Hufftable(0 /* not used */),
/* 5 */ new MP3Hufftable(hufftab5, 0, 3),
/* 6 */ new MP3Hufftable(hufftab6, 0, 4),
/* 7 */ new MP3Hufftable(hufftab7, 0, 4),
/* 8 */ new MP3Hufftable(hufftab8, 0, 4),
/* 9 */ new MP3Hufftable(hufftab9, 0, 4),
/* 10 */ new MP3Hufftable(hufftab10, 0, 4),
/* 11 */ new MP3Hufftable(hufftab11, 0, 4),
/* 12 */ new MP3Hufftable(hufftab12, 0, 4),
/* 13 */ new MP3Hufftable(hufftab13, 0, 4),
/* 14 */ null, //new MP3Hufftable(0 /* not used */),
/* 15 */ new MP3Hufftable(hufftab15, 0, 4),
/* 16 */ new MP3Hufftable(hufftab16, 1, 4),
/* 17 */ new MP3Hufftable(hufftab16, 2, 4),
/* 18 */ new MP3Hufftable(hufftab16, 3, 4),
/* 19 */ new MP3Hufftable(hufftab16, 4, 4),
/* 20 */ new MP3Hufftable(hufftab16, 6, 4),
/* 21 */ new MP3Hufftable(hufftab16, 8, 4),
/* 22 */ new MP3Hufftable(hufftab16, 10, 4),
/* 23 */ new MP3Hufftable(hufftab16, 13, 4),
/* 24 */ new MP3Hufftable(hufftab24, 4, 4),
/* 25 */ new MP3Hufftable(hufftab24, 5, 4),
/* 26 */ new MP3Hufftable(hufftab24, 6, 4),
/* 27 */ new MP3Hufftable(hufftab24, 7, 4),
/* 28 */ new MP3Hufftable(hufftab24, 8, 4),
/* 29 */ new MP3Hufftable(hufftab24, 9, 4),
/* 30 */ new MP3Hufftable(hufftab24, 11, 4),
/* 31 */ new MP3Hufftable(hufftab24, 13, 4)
];
},{}],7:[function(require,module,exports){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
const ENCODINGS = ['latin1', 'utf16-bom', 'utf16-be', 'utf8'];
var ID3Stream = AV.Base.extend({
constructor: function(header, stream) {
this.header = header;
this.stream = stream;
this.offset = 0;
},
read: function() {
if (!this.data) {
this.data = {};
// read all frames
var frame;
while (frame = this.readFrame()) {
// if we already have an instance of this key, add it to an array
if (frame.key in this.data) {
if (!Array.isArray(this.data[frame.key]))
this.data[frame.key] = [this.data[frame.key]];
this.data[frame.key].push(frame.value);
} else {
this.data[frame.key] = frame.value;
}
}
}
return this.data;
},
readFrame: function() {
if (this.offset >= this.header.length)
return null;
// get the header
var header = this.readHeader();
var decoder = header.identifier;
if (header.identifier.charCodeAt(0) === 0) {
this.offset += this.header.length + 1;
return null;
}
// map common frame names to a single type
if (!this.frameTypes[decoder]) {
for (var key in this.map) {
if (this.map[key].indexOf(decoder) !== -1) {
decoder = key;
break;
}
}
}
if (this.frameTypes[decoder]) {
// decode the frame
var frame = this.decodeFrame(header, this.frameTypes[decoder]),
keys = Object.keys(frame);
// if it only returned one key, use that as the value
if (keys.length === 1)
frame = frame[keys[0]];
var result = {
value: frame
};
} else {
// No frame type found, treat it as binary
var result = {
value: this.stream.readBuffer(Math.min(header.length, this.header.length - this.offset))
};
}
result.key = this.names[header.identifier] ? this.names[header.identifier] : header.identifier;
// special sauce for cover art, which should just be a buffer
if (result.key === 'coverArt')
result.value = result.value.data;
this.offset += 10 + header.length;
return result;
},
decodeFrame: function(header, fields) {
var stream = this.stream,
start = stream.offset;
var encoding = 0, ret = {};
var len = Object.keys(fields).length, i = 0;
for (var key in fields) {
var type = fields[key];
var rest = header.length - (stream.offset - start);
i++;
// check for special field names
switch (key) {
case 'encoding':
encoding = stream.readUInt8();
continue;
case 'language':
ret.language = stream.readString(3);
continue;
}
// check types
switch (type) {
case 'latin1':
ret[key] = stream.readString(i === len ? rest : null, 'latin1');
break;
case 'string':
ret[key] = stream.readString(i === len ? rest : null, ENCODINGS[encoding]);
break;
case 'binary':
ret[key] = stream.readBuffer(rest)
break;
case 'int16':
ret[key] = stream.readInt16();
break;
case 'int8':
ret[key] = stream.readInt8();
break;
case 'int24':
ret[key] = stream.readInt24();
break;
case 'int32':
ret[key] = stream.readInt32();
break;
case 'int32+':
ret[key] = stream.readInt32();
if (rest > 4)
throw new Error('Seriously dude? Stop playing this song and get a life!');
break;
case 'date':
var val = stream.readString(8);
ret[key] = new Date(val.slice(0, 4), val.slice(4, 6) - 1, val.slice(6, 8));
break;
case 'frame_id':
ret[key] = stream.readString(4);
break;
default:
throw new Error('Unknown key type ' + type);
}
}
// Just in case something went wrong...
var rest = header.length - (stream.offset - start);
if (rest > 0)
stream.advance(rest);
return ret;
}
});
// ID3 v2.3 and v2.4 support
exports.ID3v23Stream = ID3Stream.extend({
readHeader: function() {
var identifier = this.stream.readString(4);
var length = 0;
if (this.header.major === 4) {
for (var i = 0; i < 4; i++)
length = (length << 7) + (this.stream.readUInt8() & 0x7f);
} else {
length = this.stream.readUInt32();
}
return {
identifier: identifier,
length: length,
flags: this.stream.readUInt16()
};
},
map: {
text: [
// Identification Frames
'TIT1', 'TIT2', 'TIT3', 'TALB', 'TOAL', 'TRCK', 'TPOS', 'TSST', 'TSRC',
// Involved Persons Frames
'TPE1', 'TPE2', 'TPE3', 'TPE4', 'TOPE', 'TEXT', 'TOLY', 'TCOM', 'TMCL', 'TIPL', 'TENC',
// Derived and Subjective Properties Frames
'TBPM', 'TLEN', 'TKEY', 'TLAN', 'TCON', 'TFLT', 'TMED', 'TMOO',
// Rights and Licence Frames
'TCOP', 'TPRO', 'TPUB', 'TOWN', 'TRSN', 'TRSO',
// Other Text Frames
'TOFN', 'TDLY', 'TDEN', 'TDOR', 'TDRC', 'TDRL', 'TDTG', 'TSSE', 'TSOA', 'TSOP', 'TSOT',
// Deprecated Text Frames
'TDAT', 'TIME', 'TORY', 'TRDA', 'TSIZ', 'TYER',
// Non-standard iTunes Frames
'TCMP', 'TSO2', 'TSOC'
],
url: [
'WCOM', 'WCOP', 'WOAF', 'WOAR', 'WOAS', 'WORS', 'WPAY', 'WPUB'
]
},
frameTypes: {
text: {
encoding: 1,
value: 'string'
},
url: {
value: 'latin1'
},
TXXX: {
encoding: 1,
description: 'string',
value: 'string'
},
WXXX: {
encoding: 1,
description: 'string',
value: 'latin1',
},
USLT: {
encoding: 1,
language: 1,
description: 'string',
value: 'string'
},
COMM: {
encoding: 1,
language: 1,
description: 'string',
value: 'string'
},
APIC: {
encoding: 1,
mime: 'latin1',
type: 'int8',
description: 'string',
data: 'binary'
},
UFID: {
owner: 'latin1',
identifier: 'binary'
},
MCDI: {
value: 'binary'
},
PRIV: {
owner: 'latin1',
value: 'binary'
},
GEOB: {
encoding: 1,
mime: 'latin1',
filename: 'string',
description: 'string',
data: 'binary'
},
PCNT: {
value: 'int32+'
},
POPM: {
email: 'latin1',
rating: 'int8',
counter: 'int32+'
},
AENC: {
owner: 'latin1',
previewStart: 'int16',
previewLength: 'int16',
encryptionInfo: 'binary'
},
ETCO: {
format: 'int8',
data: 'binary' // TODO
},
MLLT: {
framesBetweenReference: 'int16',
bytesBetweenReference: 'int24',
millisecondsBetweenReference: 'int24',
bitsForBytesDeviation: 'int8',
bitsForMillisecondsDev: 'int8',
data: 'binary' // TODO
},
SYTC: {
format: 'int8',
tempoData: 'binary' // TODO
},
SYLT: {
encoding: 1,
language: 1,
format: 'int8',
contentType: 'int8',
description: 'string',
data: 'binary' // TODO
},
RVA2: {
identification: 'latin1',
data: 'binary' // TODO
},
EQU2: {
interpolationMethod: 'int8',
identification: 'latin1',
data: 'binary' // TODO
},
RVRB: {
left: 'int16',
right: 'int16',
bouncesLeft: 'int8',
bouncesRight: 'int8',
feedbackLL: 'int8',
feedbackLR: 'int8',
feedbackRR: 'int8',
feedbackRL: 'int8',
premixLR: 'int8',
premixRL: 'int8'
},
RBUF: {
size: 'int24',
flag: 'int8',
offset: 'int32'
},
LINK: {
identifier: 'frame_id',
url: 'latin1',
data: 'binary' // TODO stringlist?
},
POSS: {
format: 'int8',
position: 'binary' // TODO
},
USER: {
encoding: 1,
language: 1,
value: 'string'
},
OWNE: {
encoding: 1,
price: 'latin1',
purchaseDate: 'date',
seller: 'string'
},
COMR: {
encoding: 1,
price: 'latin1',
validUntil: 'date',
contactURL: 'latin1',
receivedAs: 'int8',
seller: 'string',
description: 'string',
logoMime: 'latin1',
logo: 'binary'
},
ENCR: {
owner: 'latin1',
methodSymbol: 'int8',
data: 'binary'
},
GRID: {
owner: 'latin1',
groupSymbol: 'int8',
data: 'binary'
},
SIGN: {
groupSymbol: 'int8',
signature: 'binary'
},
SEEK: {
value: 'int32'
},
ASPI: {
dataStart: 'int32',
dataLength: 'int32',
numPoints: 'int16',
bitsPerPoint: 'int8',
data: 'binary' // TODO
},
// Deprecated ID3 v2.3 frames
IPLS: {
encoding: 1,
value: 'string' // list?
},
RVAD: {
adjustment: 'int8',
bits: 'int8',
data: 'binary' // TODO
},
EQUA: {
adjustmentBits: 'int8',
data: 'binary' // TODO
}
},
names: {
// Identification Frames
'TIT1': 'grouping',
'TIT2': 'title',
'TIT3': 'subtitle',
'TALB': 'album',
'TOAL': 'originalAlbumTitle',
'TRCK': 'trackNumber',
'TPOS': 'diskNumber',
'TSST': 'setSubtitle',
'TSRC': 'ISRC',
// Involved Persons Frames
'TPE1': 'artist',
'TPE2': 'albumArtist',
'TPE3': 'conductor',
'TPE4': 'modifiedBy',
'TOPE': 'originalArtist',
'TEXT': 'lyricist',
'TOLY': 'originalLyricist',
'TCOM': 'composer',
'TMCL': 'musicianCreditsList',
'TIPL': 'involvedPeopleList',
'TENC': 'encodedBy',
// Derived and Subjective Properties Frames
'TBPM': 'tempo',
'TLEN': 'length',
'TKEY': 'initialKey',
'TLAN': 'language',
'TCON': 'genre',
'TFLT': 'fileType',
'TMED': 'mediaType',
'TMOO': 'mood',
// Rights and Licence Frames
'TCOP': 'copyright',
'TPRO': 'producedNotice',
'TPUB': 'publisher',
'TOWN': 'fileOwner',
'TRSN': 'internetRadioStationName',
'TRSO': 'internetRadioStationOwner',
// Other Text Frames
'TOFN': 'originalFilename',
'TDLY': 'playlistDelay',
'TDEN': 'encodingTime',
'TDOR': 'originalReleaseTime',
'TDRC': 'recordingTime',
'TDRL': 'releaseTime',
'TDTG': 'taggingTime',
'TSSE': 'encodedWith',
'TSOA': 'albumSortOrder',
'TSOP': 'performerSortOrder',
'TSOT': 'titleSortOrder',
// User defined text information
'TXXX': 'userText',
// Unsynchronised lyrics/text transcription
'USLT': 'lyrics',
// Attached Picture Frame
'APIC': 'coverArt',
// Unique Identifier Frame
'UFID': 'uniqueIdentifier',
// Music CD Identifier Frame
'MCDI': 'CDIdentifier',
// Comment Frame
'COMM': 'comments',
// URL link frames
'WCOM': 'commercialInformation',
'WCOP': 'copyrightInformation',
'WOAF': 'officialAudioFileWebpage',
'WOAR': 'officialArtistWebpage',
'WOAS': 'officialAudioSourceWebpage',
'WORS': 'officialInternetRadioStationHomepage',
'WPAY': 'payment',
'WPUB': 'officialPublisherWebpage',
// User Defined URL Link Frame
'WXXX': 'url',
'PRIV': 'private',
'GEOB': 'generalEncapsulatedObject',
'PCNT': 'playCount',
'POPM': 'rating',
'AENC': 'audioEncryption',
'ETCO': 'eventTimingCodes',
'MLLT': 'MPEGLocationLookupTable',
'SYTC': 'synchronisedTempoCodes',
'SYLT': 'synchronisedLyrics',
'RVA2': 'volumeAdjustment',
'EQU2': 'equalization',
'RVRB': 'reverb',
'RBUF': 'recommendedBufferSize',
'LINK': 'link',
'POSS': 'positionSynchronisation',
'USER': 'termsOfUse',
'OWNE': 'ownership',
'COMR': 'commercial',
'ENCR': 'encryption',
'GRID': 'groupIdentifier',
'SIGN': 'signature',
'SEEK': 'seek',
'ASPI': 'audioSeekPointIndex',
// Deprecated ID3 v2.3 frames
'TDAT': 'date',
'TIME': 'time',
'TORY': 'originalReleaseYear',
'TRDA': 'recordingDates',
'TSIZ': 'size',
'TYER': 'year',
'IPLS': 'involvedPeopleList',
'RVAD': 'volumeAdjustment',
'EQUA': 'equalization',
// Non-standard iTunes frames
'TCMP': 'compilation',
'TSO2': 'albumArtistSortOrder',
'TSOC': 'composerSortOrder'
}
});
// ID3 v2.2 support
exports.ID3v22Stream = exports.ID3v23Stream.extend({
readHeader: function() {
var id = this.stream.readString(3);
if (this.frameReplacements[id] && !this.frameTypes[id])
this.frameTypes[id] = this.frameReplacements[id];
return {
identifier: this.replacements[id] || id,
length: this.stream.readUInt24()
};
},
// map 3 char ID3 v2.2 names to 4 char ID3 v2.3/4 names
replacements: {
'UFI': 'UFID',
'TT1': 'TIT1',
'TT2': 'TIT2',
'TT3': 'TIT3',
'TP1': 'TPE1',
'TP2': 'TPE2',
'TP3': 'TPE3',
'TP4': 'TPE4',
'TCM': 'TCOM',
'TXT': 'TEXT',
'TLA': 'TLAN',
'TCO': 'TCON',
'TAL': 'TALB',
'TPA': 'TPOS',
'TRK': 'TRCK',
'TRC': 'TSRC',
'TYE': 'TYER',
'TDA': 'TDAT',
'TIM': 'TIME',
'TRD': 'TRDA',
'TMT': 'TMED',
'TFT': 'TFLT',
'TBP': 'TBPM',
'TCR': 'TCOP',
'TPB': 'TPUB',
'TEN': 'TENC',
'TSS': 'TSSE',
'TOF': 'TOFN',
'TLE': 'TLEN',
'TSI': 'TSIZ',
'TDY': 'TDLY',
'TKE': 'TKEY',
'TOT': 'TOAL',
'TOA': 'TOPE',
'TOL': 'TOLY',
'TOR': 'TORY',
'TXX': 'TXXX',
'WAF': 'WOAF',
'WAR': 'WOAR',
'WAS': 'WOAS',
'WCM': 'WCOM',
'WCP': 'WCOP',
'WPB': 'WPUB',
'WXX': 'WXXX',
'IPL': 'IPLS',
'MCI': 'MCDI',
'ETC': 'ETCO',
'MLL': 'MLLT',
'STC': 'SYTC',
'ULT': 'USLT',
'SLT': 'SYLT',
'COM': 'COMM',
'RVA': 'RVAD',
'EQU': 'EQUA',
'REV': 'RVRB',
'GEO': 'GEOB',
'CNT': 'PCNT',
'POP': 'POPM',
'BUF': 'RBUF',
'CRA': 'AENC',
'LNK': 'LINK',
// iTunes stuff
'TST': 'TSOT',
'TSP': 'TSOP',
'TSA': 'TSOA',
'TCP': 'TCMP',
'TS2': 'TSO2',
'TSC': 'TSOC'
},
// replacements for ID3 v2.3/4 frames
frameReplacements: {
PIC: {
encoding: 1,
format: 'int24',
type: 'int8',
description: 'string',
data: 'binary'
},
CRM: {
owner: 'latin1',
description: 'latin1',
data: 'binary'
}
}
});
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],8:[function(require,module,exports){
function IMDCT() {
this.tmp_imdct36 = new Float64Array(18);
this.tmp_dctIV = new Float64Array(18);
this.tmp_sdctII = new Float64Array(9);
}
// perform X[18]->x[36] IMDCT using Szu-Wei Lee's fast algorithm
IMDCT.prototype.imdct36 = function(x, y) {
var tmp = this.tmp_imdct36;
/* DCT-IV */
this.dctIV(x, tmp);
// convert 18-point DCT-IV to 36-point IMDCT
for (var i = 0; i < 9; ++i) {
y[i] = tmp[9 + i];
}
for (var i = 9; i < 27; ++i) {
y[i] = -tmp[36 - (9 + i) - 1];
}
for (var i = 27; i < 36; ++i) {
y[i] = -tmp[i - 27];
}
};
var dctIV_scale = [];
for(i = 0; i < 18; i++) {
dctIV_scale[i] = 2 * Math.cos(Math.PI * (2 * i + 1) / (4 * 18));
}
IMDCT.prototype.dctIV = function(y, X) {
var tmp = this.tmp_dctIV;
// scaling
for (var i = 0; i < 18; ++i) {
tmp[i] = y[i] * dctIV_scale[i];
}
// SDCT-II
this.sdctII(tmp, X);
// scale reduction and output accumulation
X[0] /= 2;
for (var i = 1; i < 18; ++i) {
X[i] = X[i] / 2 - X[i - 1];
}
};
var sdctII_scale = [];
for (var i = 0; i < 9; ++i) {
sdctII_scale[i] = 2 * Math.cos(Math.PI * (2 * i + 1) / (2 * 18));
}
IMDCT.prototype.sdctII = function(x, X) {
// divide the 18-point SDCT-II into two 9-point SDCT-IIs
var tmp = this.tmp_sdctII;
// even input butterfly
for (var i = 0; i < 9; ++i) {
tmp[i] = x[i] + x[18 - i - 1];
}
fastsdct(tmp, X, 0);
// odd input butterfly and scaling
for (var i = 0; i < 9; ++i) {
tmp[i] = (x[i] - x[18 - i - 1]) * sdctII_scale[i];
}
fastsdct(tmp, X, 1);
// output accumulation
for (var i = 3; i < 18; i += 2) {
X[i] -= X[i - 2];
}
};
var c0 = 2 * Math.cos( 1 * Math.PI / 18);
var c1 = 2 * Math.cos( 3 * Math.PI / 18);
var c2 = 2 * Math.cos( 4 * Math.PI / 18);
var c3 = 2 * Math.cos( 5 * Math.PI / 18);
var c4 = 2 * Math.cos( 7 * Math.PI / 18);
var c5 = 2 * Math.cos( 8 * Math.PI / 18);
var c6 = 2 * Math.cos(16 * Math.PI / 18);
function fastsdct(x, y, offset) {
var a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12;
var a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25;
var m0, m1, m2, m3, m4, m5, m6, m7;
a0 = x[3] + x[5];
a1 = x[3] - x[5];
a2 = x[6] + x[2];
a3 = x[6] - x[2];
a4 = x[1] + x[7];
a5 = x[1] - x[7];
a6 = x[8] + x[0];
a7 = x[8] - x[0];
a8 = a0 + a2;
a9 = a0 - a2;
a10 = a0 - a6;
a11 = a2 - a6;
a12 = a8 + a6;
a13 = a1 - a3;
a14 = a13 + a7;
a15 = a3 + a7;
a16 = a1 - a7;
a17 = a1 + a3;
m0 = a17 * -c3;
m1 = a16 * -c0;
m2 = a15 * -c4;
m3 = a14 * -c1;
m4 = a5 * -c1;
m5 = a11 * -c6;
m6 = a10 * -c5;
m7 = a9 * -c2;
a18 = x[4] + a4;
a19 = 2 * x[4] - a4;
a20 = a19 + m5;
a21 = a19 - m5;
a22 = a19 + m6;
a23 = m4 + m2;
a24 = m4 - m2;
a25 = m4 + m1;
// output to every other slot for convenience
y[offset + 0] = a18 + a12;
y[offset + 2] = m0 - a25;
y[offset + 4] = m7 - a20;
y[offset + 6] = m3;
y[offset + 8] = a21 - m6;
y[offset + 10] = a24 - m1;
y[offset + 12] = a12 - 2 * a18;
y[offset + 14] = a23 + m0;
y[offset + 16] = a22 + m7;
}
IMDCT.S = [
/* 0 */ [ 0.608761429,
-0.923879533,
-0.130526192,
0.991444861,
-0.382683432,
-0.793353340 ],
/* 6 */ [ -0.793353340,
0.382683432,
0.991444861,
0.130526192,
-0.923879533,
-0.608761429 ],
/* 1 */ [ 0.382683432,
-0.923879533,
0.923879533,
-0.382683432,
-0.382683432,
0.923879533 ],
/* 7 */ [ -0.923879533,
-0.382683432,
0.382683432,
0.923879533,
0.923879533,
0.382683432 ],
/* 2 */ [ 0.130526192,
-0.382683432,
0.608761429,
-0.793353340,
0.923879533,
-0.991444861 ],
/* 8 */ [ -0.991444861,
-0.923879533,
-0.793353340,
-0.608761429,
-0.382683432,
-0.130526192 ]
];
module.exports = IMDCT;
},{}],9:[function(require,module,exports){
var tables = require('./tables');
var MP3FrameHeader = require('./header');
var MP3Frame = require('./frame');
var utils = require('./utils');
function Layer1() {
this.allocation = utils.makeArray([2, 32], Uint8Array);
this.scalefactor = utils.makeArray([2, 32], Uint8Array);
}
MP3Frame.layers[1] = Layer1;
// linear scaling table
const LINEAR_TABLE = new Float32Array([
1.33333333333333, 1.14285714285714, 1.06666666666667,
1.03225806451613, 1.01587301587302, 1.00787401574803,
1.00392156862745, 1.00195694716243, 1.00097751710655,
1.00048851978505, 1.00024420024420, 1.00012208521548,
1.00006103888177, 1.00003051850948
]);
Layer1.prototype.decode = function(stream, frame) {
var header = frame.header;
var nch = header.nchannels();
var bound = 32;
if (header.mode === MP3FrameHeader.MODE.JOINT_STEREO) {
header.flags |= MP3FrameHeader.FLAGS.I_STEREO;
bound = 4 + header.mode_extension * 4;
}
if (header.flags & MP3FrameHeader.FLAGS.PROTECTION) {
// TODO: crc check
}
// decode bit allocations
var allocation = this.allocation;
for (var sb = 0; sb < bound; sb++) {
for (var ch = 0; ch < nch; ch++) {
var nb = stream.read(4);
if (nb === 15)
throw new Error("forbidden bit allocation value");
allocation[ch][sb] = nb ? nb + 1 : 0;
}
}
for (var sb = bound; sb < 32; sb++) {
var nb = stream.read(4);
if (nb === 15)
throw new Error("forbidden bit allocation value");
allocation[0][sb] =
allocation[1][sb] = nb ? nb + 1 : 0;
}
// decode scalefactors
var scalefactor = this.scalefactor;
for (var sb = 0; sb < 32; sb++) {
for (var ch = 0; ch < nch; ch++) {
if (allocation[ch][sb]) {
scalefactor[ch][sb] = stream.read(6);
/*
* Scalefactor index 63 does not appear in Table B.1 of
* ISO/IEC 11172-3. Nonetheless, other implementations accept it,
* so we do as well
*/
}
}
}
// decode samples
for (var s = 0; s < 12; s++) {
for (var sb = 0; sb < bound; sb++) {
for (var ch = 0; ch < nch; ch++) {
var nb = allocation[ch][sb];
frame.sbsample[ch][s][sb] = nb ? this.sample(stream, nb) * tables.SF_TABLE[scalefactor[ch][sb]] : 0;
}
}
for (var sb = bound; sb < 32; sb++) {
var nb = allocation[0][sb];
if (nb) {
var sample = this.sample(stream, nb);
for (var ch = 0; ch < nch; ch++) {
frame.sbsample[ch][s][sb] = sample * tables.SF_TABLE[scalefactor[ch][sb]];
}
} else {
for (var ch = 0; ch < nch; ch++) {
frame.sbsample[ch][s][sb] = 0;
}
}
}
}
};
Layer1.prototype.sample = function(stream, nb) {
var sample = stream.read(nb);
// invert most significant bit, and form a 2's complement sample
sample ^= 1 << (nb - 1);
sample |= -(sample & (1 << (nb - 1)));
sample /= (1 << (nb - 1));
// requantize the sample
// s'' = (2^nb / (2^nb - 1)) * (s''' + 2^(-nb + 1))
sample += 1 >> (nb - 1);
return sample * LINEAR_TABLE[nb - 2];
};
module.exports = Layer1;
},{"./frame":4,"./header":5,"./tables":14,"./utils":15}],10:[function(require,module,exports){
var tables = require('./tables');
var MP3FrameHeader = require('./header');
var MP3Frame = require('./frame');
var utils = require('./utils');
function Layer2() {
this.samples = new Float64Array(3);
this.allocation = utils.makeArray([2, 32], Uint8Array);
this.scfsi = utils.makeArray([2, 32], Uint8Array);
this.scalefactor = utils.makeArray([2, 32, 3], Uint8Array);
}
MP3Frame.layers[2] = Layer2;
// possible quantization per subband table
const SBQUANT = [
// ISO/IEC 11172-3 Table B.2a
{ sblimit: 27, offsets:
[ 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0 ] },
// ISO/IEC 11172-3 Table B.2b
{ sblimit: 30, offsets:
[ 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0 ] },
// ISO/IEC 11172-3 Table B.2c
{ sblimit: 8, offsets:
[ 5, 5, 2, 2, 2, 2, 2, 2 ] },
// ISO/IEC 11172-3 Table B.2d
{ sblimit: 12, offsets:
[ 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 ] },
// ISO/IEC 13818-3 Table B.1
{ sblimit: 30, offsets:
[ 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ] }
];
// bit allocation table
const BITALLOC = [
{ nbal: 2, offset: 0 }, // 0
{ nbal: 2, offset: 3 }, // 1
{ nbal: 3, offset: 3 }, // 2
{ nbal: 3, offset: 1 }, // 3
{ nbal: 4, offset: 2 }, // 4
{ nbal: 4, offset: 3 }, // 5
{ nbal: 4, offset: 4 }, // 6
{ nbal: 4, offset: 5 } // 7
];
// offsets into quantization class table
const OFFSETS = [
[ 0, 1, 16 ], // 0
[ 0, 1, 2, 3, 4, 5, 16 ], // 1
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 ], // 2
[ 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ], // 3
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16 ], // 4
[ 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ] // 5
];
/*
* These are the Layer II classes of quantization.
* The table is derived from Table B.4 of ISO/IEC 11172-3.
*/
const QC_TABLE = [
{ nlevels: 3, group: 2, bits: 5, C: 1.33333333333, D: 0.50000000000 },
{ nlevels: 5, group: 3, bits: 7, C: 1.60000000000, D: 0.50000000000 },
{ nlevels: 7, group: 0, bits: 3, C: 1.14285714286, D: 0.25000000000 },
{ nlevels: 9, group: 4, bits: 10, C: 1.77777777777, D: 0.50000000000 },
{ nlevels: 15, group: 0, bits: 4, C: 1.06666666666, D: 0.12500000000 },
{ nlevels: 31, group: 0, bits: 5, C: 1.03225806452, D: 0.06250000000 },
{ nlevels: 63, group: 0, bits: 6, C: 1.01587301587, D: 0.03125000000 },
{ nlevels: 127, group: 0, bits: 7, C: 1.00787401575, D: 0.01562500000 },
{ nlevels: 255, group: 0, bits: 8, C: 1.00392156863, D: 0.00781250000 },
{ nlevels: 511, group: 0, bits: 9, C: 1.00195694716, D: 0.00390625000 },
{ nlevels: 1023, group: 0, bits: 10, C: 1.00097751711, D: 0.00195312500 },
{ nlevels: 2047, group: 0, bits: 11, C: 1.00048851979, D: 0.00097656250 },
{ nlevels: 4095, group: 0, bits: 12, C: 1.00024420024, D: 0.00048828125 },
{ nlevels: 8191, group: 0, bits: 13, C: 1.00012208522, D: 0.00024414063 },
{ nlevels: 16383, group: 0, bits: 14, C: 1.00006103888, D: 0.00012207031 },
{ nlevels: 32767, group: 0, bits: 15, C: 1.00003051851, D: 0.00006103516 },
{ nlevels: 65535, group: 0, bits: 16, C: 1.00001525902, D: 0.00003051758 }
];
Layer2.prototype.decode = function(stream, frame) {
var header = frame.header;
var nch = header.nchannels();
var index;
if (header.flags & MP3FrameHeader.FLAGS.LSF_EXT) {
index = 4;
} else if (header.flags & MP3FrameHeader.FLAGS.FREEFORMAT) {
index = header.samplerate === 48000 ? 0 : 1;
} else {
var bitrate_per_channel = header.bitrate;
if (nch === 2) {
bitrate_per_channel /= 2;
/*
* ISO/IEC 11172-3 allows only single channel mode for 32, 48, 56, and
* 80 kbps bitrates in Layer II, but some encoders ignore this
* restriction, so we ignore it as well.
*/
} else {
/*
* ISO/IEC 11172-3 does not allow single channel mode for 224, 256,
* 320, or 384 kbps bitrates in Layer II.
*/
if (bitrate_per_channel > 192000)
throw new Error('bad bitrate/mode combination');
}
if (bitrate_per_channel <= 48000)
index = header.samplerate === 32000 ? 3 : 2;
else if (bitrate_per_channel <= 80000)
index = 0;
else
index = header.samplerate === 48000 ? 0 : 1;
}
var sblimit = SBQUANT[index].sblimit;
var offsets = SBQUANT[index].offsets;
var bound = 32;
if (header.mode === MP3FrameHeader.MODE.JOINT_STEREO) {
header.flags |= MP3FrameHeader.FLAGS.I_STEREO;
bound = 4 + header.mode_extension * 4;
}
if (bound > sblimit)
bound = sblimit;
// decode bit allocations
var allocation = this.allocation;
for (var sb = 0; sb < bound; sb++) {
var nbal = BITALLOC[offsets[sb]].nbal;
for (var ch = 0; ch < nch; ch++)
allocation[ch][sb] = stream.read(nbal);
}
for (var sb = bound; sb < sblimit; sb++) {
var nbal = BITALLOC[offsets[sb]].nbal;
allocation[0][sb] =
allocation[1][sb] = stream.read(nbal);
}
// decode scalefactor selection info
var scfsi = this.scfsi;
for (var sb = 0; sb < sblimit; sb++) {
for (var ch = 0; ch < nch; ch++) {
if (allocation[ch][sb])
scfsi[ch][sb] = stream.read(2);
}
}
if (header.flags & MP3FrameHeader.FLAGS.PROTECTION) {
// TODO: crc check
}
// decode scalefactors
var scalefactor = this.scalefactor;
for (var sb = 0; sb < sblimit; sb++) {
for (var ch = 0; ch < nch; ch++) {
if (allocation[ch][sb]) {
scalefactor[ch][sb][0] = stream.read(6);
switch (scfsi[ch][sb]) {
case 2:
scalefactor[ch][sb][2] =
scalefactor[ch][sb][1] = scalefactor[ch][sb][0];
break;
case 0:
scalefactor[ch][sb][1] = stream.read(6);
// fall through
case 1:
case 3:
scalefactor[ch][sb][2] = stream.read(6);
}
if (scfsi[ch][sb] & 1)
scalefactor[ch][sb][1] = scalefactor[ch][sb][scfsi[ch][sb] - 1];
/*
* Scalefactor index 63 does not appear in Table B.1 of
* ISO/IEC 11172-3. Nonetheless, other implementations accept it,
* so we do as well.
*/
}
}
}
// decode samples
for (var gr = 0; gr < 12; gr++) {
// normal
for (var sb = 0; sb < bound; sb++) {
for (var ch = 0; ch < nch; ch++) {
if (index = allocation[ch][sb]) {
index = OFFSETS[BITALLOC[offsets[sb]].offset][index - 1];
this.decodeSamples(stream, QC_TABLE[index]);
var scale = tables.SF_TABLE[scalefactor[ch][sb][gr >> 2]];
for (var s = 0; s < 3; s++) {
frame.sbsample[ch][3 * gr + s][sb] = this.samples[s] * scale;
}
} else {
for (var s = 0; s < 3; s++) {
frame.sbsample[ch][3 * gr + s][sb] = 0;
}
}
}
}
// joint stereo
for (var sb = bound; sb < sblimit; sb++) {
if (index = allocation[0][sb]) {
index = OFFSETS[BITALLOC[offsets[sb]].offset][index - 1];
this.decodeSamples(stream, QC_TABLE[index]);
for (var ch = 0; ch < nch; ch++) {
var scale = tables.SF_TABLE[scalefactor[ch][sb][gr >> 2]];
for (var s = 0; s < 3; s++) {
frame.sbsample[ch][3 * gr + s][sb] = this.samples[s] * scale;
}
}
} else {
for (var ch = 0; ch < nch; ch++) {
for (var s = 0; s < 3; s++) {
frame.sbsample[ch][3 * gr + s][sb] = 0;
}
}
}
}
// the rest
for (var ch = 0; ch < nch; ch++) {
for (var s = 0; s < 3; s++) {
for (var sb = sblimit; sb < 32; sb++) {
frame.sbsample[ch][3 * gr + s][sb] = 0;
}
}
}
}
};
Layer2.prototype.decodeSamples = function(stream, quantclass) {
var sample = this.samples;
var nb = quantclass.group;
if (nb) {
// degrouping
var c = stream.read(quantclass.bits);
var nlevels = quantclass.nlevels;
for (var s = 0; s < 3; s++) {
sample[s] = c % nlevels;
c = c / nlevels | 0;
}
} else {
nb = quantclass.bits;
for (var s = 0; s < 3; s++) {
sample[s] = stream.read(nb);
}
}
for (var s = 0; s < 3; s++) {
// invert most significant bit, and form a 2's complement sample
var requantized = sample[s] ^ (1 << (nb - 1));
requantized |= -(requantized & (1 << (nb - 1)));
requantized /= (1 << (nb - 1));
// requantize the sample
sample[s] = (requantized + quantclass.D) * quantclass.C;
}
};
module.exports = Layer2;
},{"./frame":4,"./header":5,"./tables":14,"./utils":15}],11:[function(require,module,exports){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
var tables = require('./tables');
var MP3FrameHeader = require('./header');
var MP3Frame = require('./frame');
var huffman = require('./huffman');
var IMDCT = require('./imdct');
var utils = require('./utils');
function MP3SideInfo() {
this.main_data_begin = null;
this.private_bits = null;
this.gr = [new MP3Granule(), new MP3Granule()];
this.scfsi = new Uint8Array(2);
}
function MP3Granule() {
this.ch = [new MP3Channel(), new MP3Channel()];
}
function MP3Channel() {
// from side info
this.part2_3_length = null;
this.big_values = null;
this.global_gain = null;
this.scalefac_compress = null;
this.flags = null;
this.block_type = null;
this.table_select = new Uint8Array(3);
this.subblock_gain = new Uint8Array(3);
this.region0_count = null;
this.region1_count = null;
// from main_data
this.scalefac = new Uint8Array(39);
}
function Layer3() {
this.imdct = new IMDCT();
this.si = new MP3SideInfo();
// preallocate reusable typed arrays for performance
this.xr = [new Float64Array(576), new Float64Array(576)];
this._exponents = new Int32Array(39);
this.reqcache = new Float64Array(16);
this.modes = new Int16Array(39);
this.output = new Float64Array(36);
this.tmp = utils.makeArray([32, 3, 6]);
this.tmp2 = new Float64Array(32 * 3 * 6);
}
MP3Frame.layers[3] = Layer3;
Layer3.prototype.decode = function(stream, frame) {
var header = frame.header;
var next_md_begin = 0;
var md_len = 0;
var nch = header.nchannels();
var si_len = (header.flags & MP3FrameHeader.FLAGS.LSF_EXT) ? (nch === 1 ? 9 : 17) : (nch === 1 ? 17 : 32);
// check frame sanity
if (stream.next_frame - stream.nextByte() < si_len) {
stream.md_len = 0;
throw new Error('Bad frame length');
}
// check CRC word
if (header.flags & MP3FrameHeader.FLAGS.PROTECTION) {
// TODO: crc check
}
// decode frame side information
var sideInfo = this.sideInfo(stream, nch, header.flags & MP3FrameHeader.FLAGS.LSF_EXT);
var si = sideInfo.si;
var data_bitlen = sideInfo.data_bitlen;
var priv_bitlen = sideInfo.priv_bitlen;
header.flags |= priv_bitlen;
header.private_bits |= si.private_bits;
// find main_data of next frame
var peek = stream.copy();
peek.seek(stream.next_frame * 8);
var nextHeader = peek.read(16);
if ((nextHeader & 0xffe6) === 0xffe2) { // syncword | layer
if ((nextHeader & 1) === 0) // protection bit
peek.advance(16); // crc check
peek.advance(16); // skip the rest of the header
next_md_begin = peek.read((nextHeader & 8) ? 9 : 8);
}
// find main_data of this frame
var frame_space = stream.next_frame - stream.nextByte();
if (next_md_begin > si.main_data_begin + frame_space)
next_md_begin = 0;
var md_len = si.main_data_begin + frame_space - next_md_begin;
var frame_used = 0;
var ptr;
if (si.main_data_begin === 0) {
ptr = stream.stream;
stream.md_len = 0;
frame_used = md_len;
} else {
if (si.main_data_begin > stream.md_len) {
throw new Error('bad main_data_begin pointer');
} else {
var old_md_len = stream.md_len;
if (md_len > si.main_data_begin) {
if (stream.md_len + md_len - si.main_data_begin > MP3FrameHeader.BUFFER_MDLEN) {
throw new Error("Assertion failed: (stream.md_len + md_len - si.main_data_begin <= MAD_MP3FrameHeader.BUFFER_MDLEN)");
}
frame_used = md_len - si.main_data_begin;
this.memcpy(stream.main_data, stream.md_len, stream.stream.stream, stream.nextByte(), frame_used);
stream.md_len += frame_used;
}
ptr = new AV.Bitstream(AV.Stream.fromBuffer(new AV.Buffer(stream.main_data)));
ptr.advance((old_md_len - si.main_data_begin) * 8);
}
}
var frame_free = frame_space - frame_used;
// decode main_data
this.decodeMainData(ptr, frame, si, nch);
// preload main_data buffer with up to 511 bytes for next frame(s)
if (frame_free >= next_md_begin) {
this.memcpy(stream.main_data, 0, stream.stream.stream, stream.next_frame - next_md_begin, next_md_begin);
stream.md_len = next_md_begin;
} else {
if (md_len < si.main_data_begin) {
var extra = si.main_data_begin - md_len;
if (extra + frame_free > next_md_begin)
extra = next_md_begin - frame_free;
if (extra < stream.md_len) {
this.memcpy(stream.main_data, 0, stream.main_data, stream.md_len - extra, extra);
stream.md_len = extra;
}
} else {
stream.md_len = 0;
}
this.memcpy(stream.main_data, stream.md_len, stream.stream.stream, stream.next_frame - frame_free, frame_free);
stream.md_len += frame_free;
}
};
Layer3.prototype.memcpy = function(dst, dstOffset, pSrc, srcOffset, length) {
var subarr;
if (pSrc.subarray)
subarr = pSrc.subarray(srcOffset, srcOffset + length);
else
subarr = pSrc.peekBuffer(srcOffset - pSrc.offset, length).data;
// oh my, memcpy actually exists in JavaScript?
dst.set(subarr, dstOffset);
return dst;
};
Layer3.prototype.sideInfo = function(stream, nch, lsf) {
var si = this.si;
var data_bitlen = 0;
var priv_bitlen = lsf ? ((nch === 1) ? 1 : 2) : ((nch === 1) ? 5 : 3);
si.main_data_begin = stream.read(lsf ? 8 : 9);
si.private_bits = stream.read(priv_bitlen);
var ngr = 1;
if (!lsf) {
ngr = 2;
for (var ch = 0; ch < nch; ++ch)
si.scfsi[ch] = stream.read(4);
}
for (var gr = 0; gr < ngr; gr++) {
var granule = si.gr[gr];
for (var ch = 0; ch < nch; ch++) {
var channel = granule.ch[ch];
channel.part2_3_length = stream.read(12);
channel.big_values = stream.read(9);
channel.global_gain = stream.read(8);
channel.scalefac_compress = stream.read(lsf ? 9 : 4);
data_bitlen += channel.part2_3_length;
if (channel.big_values > 288)
throw new Error('bad big_values count');
channel.flags = 0;
// window_switching_flag
if (stream.read(1)) {
channel.block_type = stream.read(2);
if (channel.block_type === 0)
throw new Error('reserved block_type');
if (!lsf && channel.block_type === 2 && si.scfsi[ch])
throw new Error('bad scalefactor selection info');
channel.region0_count = 7;
channel.region1_count = 36;
if (stream.read(1))
channel.flags |= tables.MIXED_BLOCK_FLAG;
else if (channel.block_type === 2)
channel.region0_count = 8;
for (var i = 0; i < 2; i++)
channel.table_select[i] = stream.read(5);
for (var i = 0; i < 3; i++)
channel.subblock_gain[i] = stream.read(3);
} else {
channel.block_type = 0;
for (var i = 0; i < 3; i++)
channel.table_select[i] = stream.read(5);
channel.region0_count = stream.read(4);
channel.region1_count = stream.read(3);
}
// [preflag,] scalefac_scale, count1table_select
channel.flags |= stream.read(lsf ? 2 : 3);
}
}
return {
si: si,
data_bitlen: data_bitlen,
priv_bitlen: priv_bitlen
};
};
Layer3.prototype.decodeMainData = function(stream, frame, si, nch) {
var header = frame.header;
var sfreq = header.samplerate;
if (header.flags & MP3FrameHeader.FLAGS.MPEG_2_5_EXT)
sfreq *= 2;
// 48000 => 0, 44100 => 1, 32000 => 2,
// 24000 => 3, 22050 => 4, 16000 => 5
var sfreqi = ((sfreq >> 7) & 0x000f) + ((sfreq >> 15) & 0x0001) - 8;
if (header.flags & MP3FrameHeader.FLAGS.MPEG_2_5_EXT)
sfreqi += 3;
// scalefactors, Huffman decoding, requantization
var ngr = (header.flags & MP3FrameHeader.FLAGS.LSF_EXT) ? 1 : 2;
var xr = this.xr;
for (var gr = 0; gr < ngr; ++gr) {
var granule = si.gr[gr];
var sfbwidth = [];
var l = 0;
for (var ch = 0; ch < nch; ++ch) {
var channel = granule.ch[ch];
var part2_length;
sfbwidth[ch] = tables.SFBWIDTH_TABLE[sfreqi].l;
if (channel.block_type === 2) {
sfbwidth[ch] = (channel.flags & tables.MIXED_BLOCK_FLAG) ? tables.SFBWIDTH_TABLE[sfreqi].m : tables.SFBWIDTH_TABLE[sfreqi].s;
}
if (header.flags & MP3FrameHeader.FLAGS.LSF_EXT) {
part2_length = this.scalefactors_lsf(stream, channel, ch === 0 ? 0 : si.gr[1].ch[1], header.mode_extension);
} else {
part2_length = this.scalefactors(stream, channel, si.gr[0].ch[ch], gr === 0 ? 0 : si.scfsi[ch]);
}
this.huffmanDecode(stream, xr[ch], channel, sfbwidth[ch], part2_length);
}
// joint stereo processing
if (header.mode === MP3FrameHeader.MODE.JOINT_STEREO && header.mode_extension !== 0)
this.stereo(xr, si.gr, gr, header, sfbwidth[0]);
// reordering, alias reduction, IMDCT, overlap-add, frequency inversion
for (var ch = 0; ch < nch; ch++) {
var channel = granule.ch[ch];
var sample = frame.sbsample[ch].slice(18 * gr);
var sb, l = 0, i, sblimit;
var output = this.output;
if (channel.block_type === 2) {
this.reorder(xr[ch], channel, sfbwidth[ch]);
/*
* According to ISO/IEC 11172-3, "Alias reduction is not applied for
* granules with block_type === 2 (short block)." However, other
* sources suggest alias reduction should indeed be performed on the
* lower two subbands of mixed blocks. Most other implementations do
* this, so by default we will too.
*/
if (channel.flags & tables.MIXED_BLOCK_FLAG)
this.aliasreduce(xr[ch], 36);
} else {
this.aliasreduce(xr[ch], 576);
}
// subbands 0-1
if (channel.block_type !== 2 || (channel.flags & tables.MIXED_BLOCK_FLAG)) {
var block_type = channel.block_type;
if (channel.flags & tables.MIXED_BLOCK_FLAG)
block_type = 0;
// long blocks
for (var sb = 0; sb < 2; ++sb, l += 18) {
this.imdct_l(xr[ch].subarray(l, l + 18), output, block_type);
this.overlap(output, frame.overlap[ch][sb], sample, sb);
}
} else {
// short blocks
for (var sb = 0; sb < 2; ++sb, l += 18) {
this.imdct_s(xr[ch].subarray(l, l + 18), output);
this.overlap(output, frame.overlap[ch][sb], sample, sb);
}
}
this.freqinver(sample, 1);
// (nonzero) subbands 2-31
var i = 576;
while (i > 36 && xr[ch][i - 1] === 0) {
--i;
}
sblimit = 32 - (((576 - i) / 18) << 0);
if (channel.block_type !== 2) {
// long blocks
for (var sb = 2; sb < sblimit; ++sb, l += 18) {
this.imdct_l(xr[ch].subarray(l, l + 18), output, channel.block_type);
this.overlap(output, frame.overlap[ch][sb], sample, sb);
if (sb & 1)
this.freqinver(sample, sb);
}
} else {
// short blocks
for (var sb = 2; sb < sblimit; ++sb, l += 18) {
this.imdct_s(xr[ch].subarray(l, l + 18), output);
this.overlap(output, frame.overlap[ch][sb], sample, sb);
if (sb & 1)
this.freqinver(sample, sb);
}
}
// remaining (zero) subbands
for (var sb = sblimit; sb < 32; ++sb) {
this.overlap_z(frame.overlap[ch][sb], sample, sb);
if (sb & 1)
this.freqinver(sample, sb);
}
}
}
};
Layer3.prototype.scalefactors = function(stream, channel, gr0ch, scfsi) {
var start = stream.offset();
var slen1 = tables.SFLEN_TABLE[channel.scalefac_compress].slen1;
var slen2 = tables.SFLEN_TABLE[channel.scalefac_compress].slen2;
var sfbi;
if (channel.block_type === 2) {
sfbi = 0;
var nsfb = (channel.flags & tables.MIXED_BLOCK_FLAG) ? 8 + 3 * 3 : 6 * 3;
while (nsfb--)
channel.scalefac[sfbi++] = stream.read(slen1);
nsfb = 6 * 3;
while (nsfb--)
channel.scalefac[sfbi++] = stream.read(slen2);
nsfb = 1 * 3;
while (nsfb--)
channel.scalefac[sfbi++] = 0;
} else {
if (scfsi & 0x8) {
for (var sfbi = 0; sfbi < 6; ++sfbi)
channel.scalefac[sfbi] = gr0ch.scalefac[sfbi];
} else {
for (var sfbi = 0; sfbi < 6; ++sfbi)
channel.scalefac[sfbi] = stream.read(slen1);
}
if (scfsi & 0x4) {
for (var sfbi = 6; sfbi < 11; ++sfbi)
channel.scalefac[sfbi] = gr0ch.scalefac[sfbi];
} else {
for (var sfbi = 6; sfbi < 11; ++sfbi)
channel.scalefac[sfbi] = stream.read(slen1);
}
if (scfsi & 0x2) {
for (var sfbi = 11; sfbi < 16; ++sfbi)
channel.scalefac[sfbi] = gr0ch.scalefac[sfbi];
} else {
for (var sfbi = 11; sfbi < 16; ++sfbi)
channel.scalefac[sfbi] = stream.read(slen2);
}
if (scfsi & 0x1) {
for (var sfbi = 16; sfbi < 21; ++sfbi)
channel.scalefac[sfbi] = gr0ch.scalefac[sfbi];
} else {
for (var sfbi = 16; sfbi < 21; ++sfbi)
channel.scalefac[sfbi] = stream.read(slen2);
}
channel.scalefac[21] = 0;
}
return stream.offset() - start;
};
Layer3.prototype.scalefactors_lsf = function(stream, channel, gr1ch, mode_extension) {
var start = stream.offset();
var scalefac_compress = channel.scalefac_compress;
var index = channel.block_type === 2 ? (channel.flags & tables.MIXED_BLOCK_FLAG ? 2 : 1) : 0;
var slen = new Int32Array(4);
var nsfb;
if (!((mode_extension & tables.I_STEREO) && gr1ch)) {
if (scalefac_compress < 400) {
slen[0] = (scalefac_compress >>> 4) / 5;
slen[1] = (scalefac_compress >>> 4) % 5;
slen[2] = (scalefac_compress % 16) >>> 2;
slen[3] = scalefac_compress % 4;
nsfb = tables.NSFB_TABLE[0][index];
} else if (scalefac_compress < 500) {
scalefac_compress -= 400;
slen[0] = (scalefac_compress >>> 2) / 5;
slen[1] = (scalefac_compress >>> 2) % 5;
slen[2] = scalefac_compress % 4;
slen[3] = 0;
nsfb = tables.NSFB_TABLE[1][index];
} else {
scalefac_compress -= 500;
slen[0] = scalefac_compress / 3;
slen[1] = scalefac_compress % 3;
slen[2] = 0;
slen[3] = 0;
channel.flags |= tables.PREFLAG;
nsfb = tables.NSFB_TABLE[2][index];
}
var n = 0;
for (var part = 0; part < 4; part++) {
for (var i = 0; i < nsfb[part]; i++) {
channel.scalefac[n++] = stream.read(slen[part]);
}
}
while (n < 39) {
channel.scalefac[n++] = 0;
}
} else { // (mode_extension & tables.I_STEREO) && gr1ch (i.e. ch == 1)
scalefac_compress >>>= 1;
if (scalefac_compress < 180) {
slen[0] = scalefac_compress / 36;
slen[1] = (scalefac_compress % 36) / 6;
slen[2] = (scalefac_compress % 36) % 6;
slen[3] = 0;
nsfb = tables.NSFB_TABLE[3][index];
} else if (scalefac_compress < 244) {
scalefac_compress -= 180;
slen[0] = (scalefac_compress % 64) >>> 4;
slen[1] = (scalefac_compress % 16) >>> 2;
slen[2] = scalefac_compress % 4;
slen[3] = 0;
nsfb = tables.NSFB_TABLE[4][index];
} else {
scalefac_compress -= 244;
slen[0] = scalefac_compress / 3;
slen[1] = scalefac_compress % 3;
slen[2] = 0;
slen[3] = 0;
nsfb = tables.NSFB_TABLE[5][index];
}
var n = 0;
for (var part = 0; part < 4; ++part) {
var max = (1 << slen[part]) - 1;
for (var i = 0; i < nsfb[part]; ++i) {
var is_pos = stream.read(slen[part]);
channel.scalefac[n] = is_pos;
gr1ch.scalefac[n++] = is_pos === max ? 1 : 0;
}
}
while (n < 39) {
channel.scalefac[n] = 0;
gr1ch.scalefac[n++] = 0; // apparently not illegal
}
}
return stream.offset() - start;
};
Layer3.prototype.huffmanDecode = function(stream, xr, channel, sfbwidth, part2_length) {
var exponents = this._exponents;
var sfbwidthptr = 0;
var bits_left = channel.part2_3_length - part2_length;
if (bits_left < 0)
throw new Error('bad audio data length');
this.exponents(channel, sfbwidth, exponents);
var peek = stream.copy();
stream.advance(bits_left);
/* align bit reads to byte boundaries */
var cachesz = 8 - peek.bitPosition;
cachesz += ((32 - 1 - 24) + (24 - cachesz)) & ~7;
var bitcache = peek.read(cachesz);
bits_left -= cachesz;
var xrptr = 0;
// big_values
var region = 0;
var reqcache = this.reqcache;
var sfbound = xrptr + sfbwidth[sfbwidthptr++];
var rcount = channel.region0_count + 1;
var entry = huffman.huff_pair_table[channel.table_select[region]];
var table = entry.table;
var linbits = entry.linbits;
var startbits = entry.startbits;
if (typeof table === 'undefined')
throw new Error('bad Huffman table select');
var expptr = 0;
var exp = exponents[expptr++];
var reqhits = 0;
var big_values = channel.big_values;
while (big_values-- && cachesz + bits_left > 0) {
if (xrptr === sfbound) {
sfbound += sfbwidth[sfbwidthptr++];
// change table if region boundary
if (--rcount === 0) {
if (region === 0)
rcount = channel.region1_count + 1;
else
rcount = 0; // all remaining
entry = huffman.huff_pair_table[channel.table_select[++region]];
table = entry.table;
linbits = entry.linbits;
startbits = entry.startbits;
if (typeof table === 'undefined')
throw new Error('bad Huffman table select');
}
if (exp !== exponents[expptr]) {
exp = exponents[expptr];
reqhits = 0;
}
++expptr;
}
if (cachesz < 21) {
var bits = ((32 - 1 - 21) + (21 - cachesz)) & ~7;
bitcache = (bitcache << bits) | peek.read(bits);
cachesz += bits;
bits_left -= bits;
}
var clumpsz = startbits;
var pair = table[ (((bitcache) >> ((cachesz) - (clumpsz))) & ((1 << (clumpsz)) - 1))];
while (!pair.final) {
cachesz -= clumpsz;
clumpsz = pair.ptr.bits;
pair = table[pair.ptr.offset + (((bitcache) >> ((cachesz) - (clumpsz))) & ((1 << (clumpsz)) - 1))];
}
cachesz -= pair.value.hlen;
if (linbits) {
var value = pair.value.x;
var x_final = false;
switch (value) {
case 0:
xr[xrptr] = 0;
break;
case 15:
if (cachesz < linbits + 2) {
bitcache = (bitcache << 16) | peek.read(16);
cachesz += 16;
bits_left -= 16;
}
value += (((bitcache) >> ((cachesz) - (linbits))) & ((1 << (linbits)) - 1));
cachesz -= linbits;
requantized = this.requantize(value, exp);
x_final = true; // simulating goto, yay
break;
default:
if (reqhits & (1 << value)) {
requantized = reqcache[value];
} else {
reqhits |= (1 << value);
requantized = reqcache[value] = this.requantize(value, exp);
}
x_final = true;
}
if(x_final) {
xr[xrptr] = ((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized;
}
value = pair.value.y;
var y_final = false;
switch (value) {
case 0:
xr[xrptr + 1] = 0;
break;
case 15:
if (cachesz < linbits + 1) {
bitcache = (bitcache << 16) | peek.read(16);
cachesz += 16;
bits_left -= 16;
}
value += (((bitcache) >> ((cachesz) - (linbits))) & ((1 << (linbits)) - 1));
cachesz -= linbits;
requantized = this.requantize(value, exp);
y_final = true;
break; // simulating goto, yayzor
default:
if (reqhits & (1 << value)) {
requantized = reqcache[value];
} else {
reqhits |= (1 << value);
reqcache[value] = this.requantize(value, exp);
requantized = reqcache[value];
}
y_final = true;
}
if(y_final) {
xr[xrptr + 1] = ((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized;
}
} else {
var value = pair.value.x;
if (value === 0) {
xr[xrptr] = 0;
} else {
if (reqhits & (1 << value))
requantized = reqcache[value];
else {
reqhits |= (1 << value);
requantized = reqcache[value] = this.requantize(value, exp);
}
xr[xrptr] = ((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized;
}
value = pair.value.y;
if (value === 0) {
xr[xrptr + 1] = 0;
} else {
if (reqhits & (1 << value))
requantized = reqcache[value];
else {
reqhits |= (1 << value);
requantized = reqcache[value] = this.requantize(value, exp);
}
xr[xrptr + 1] = ((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized;
}
}
xrptr += 2;
}
if (cachesz + bits_left < 0)
throw new Error('Huffman data overrun');
// count1
var table = huffman.huff_quad_table[channel.flags & tables.COUNT1TABLE_SELECT];
var requantized = this.requantize(1, exp);
while (cachesz + bits_left > 0 && xrptr <= 572) {
if (cachesz < 10) {
bitcache = (bitcache << 16) | peek.read(16);
cachesz += 16;
bits_left -= 16;
}
var quad = table[(((bitcache) >> ((cachesz) - (4))) & ((1 << (4)) - 1))];
// quad tables guaranteed to have at most one extra lookup
if (!quad.final) {
cachesz -= 4;
quad = table[quad.ptr.offset + (((bitcache) >> ((cachesz) - (quad.ptr.bits))) & ((1 << (quad.ptr.bits)) - 1))];
}
cachesz -= quad.value.hlen;
if (xrptr === sfbound) {
sfbound += sfbwidth[sfbwidthptr++];
if (exp !== exponents[expptr]) {
exp = exponents[expptr];
requantized = this.requantize(1, exp);
}
++expptr;
}
// v (0..1)
xr[xrptr] = quad.value.v ? (((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized) : 0;
// w (0..1)
xr[xrptr + 1] = quad.value.w ? (((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized) : 0;
xrptr += 2;
if (xrptr === sfbound) {
sfbound += sfbwidth[sfbwidthptr++];
if (exp !== exponents[expptr]) {
exp = exponents[expptr];
requantized = this.requantize(1, exp);
}
++expptr;
}
// x (0..1)
xr[xrptr] = quad.value.x ? (((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized) : 0;
// y (0..1)
xr[xrptr + 1] = quad.value.y ? (((bitcache) & (1 << ((cachesz--) - 1))) ? -requantized : requantized) : 0;
xrptr += 2;
if (cachesz + bits_left < 0) {
// technically the bitstream is misformatted, but apparently
// some encoders are just a bit sloppy with stuffing bits
xrptr -= 4;
}
}
if (-bits_left > MP3FrameHeader.BUFFER_GUARD * 8) {
throw new Error("assertion failed: (-bits_left <= MP3FrameHeader.BUFFER_GUARD * CHAR_BIT)");
}
// rzero
while (xrptr < 576) {
xr[xrptr] = 0;
xr[xrptr + 1] = 0;
xrptr += 2;
}
};
Layer3.prototype.requantize = function(value, exp) {
// usual (x >> 0) tricks to make sure frac and exp stay integers
var frac = (exp % 4) >> 0; // assumes sign(frac) === sign(exp)
exp = (exp / 4) >> 0;
var requantized = Math.pow(value, 4.0 / 3.0);
requantized *= Math.pow(2.0, (exp / 4.0));
if (frac) {
requantized *= Math.pow(2.0, (frac / 4.0));
}
if (exp < 0) {
requantized /= Math.pow(2.0, -exp * (3.0 / 4.0));
}
return requantized;
};
Layer3.prototype.exponents = function(channel, sfbwidth, exponents) {
var gain = channel.global_gain - 210;
var scalefac_multiplier = (channel.flags & tables.SCALEFAC_SCALE) ? 2 : 1;
if (channel.block_type === 2) {
var sfbi = 0, l = 0;
if (channel.flags & tables.MIXED_BLOCK_FLAG) {
var premask = (channel.flags & tables.PREFLAG) ? ~0 : 0;
// long block subbands 0-1
while (l < 36) {
exponents[sfbi] = gain - ((channel.scalefac[sfbi] + (tables.PRETAB[sfbi] & premask)) << scalefac_multiplier);
l += sfbwidth[sfbi++];
}
}
// this is probably wrong for 8000 Hz short/mixed blocks
var gain0 = gain - 8 * channel.subblock_gain[0];
var gain1 = gain - 8 * channel.subblock_gain[1];
var gain2 = gain - 8 * channel.subblock_gain[2];
while (l < 576) {
exponents[sfbi + 0] = gain0 - (channel.scalefac[sfbi + 0] << scalefac_multiplier);
exponents[sfbi + 1] = gain1 - (channel.scalefac[sfbi + 1] << scalefac_multiplier);
exponents[sfbi + 2] = gain2 - (channel.scalefac[sfbi + 2] << scalefac_multiplier);
l += 3 * sfbwidth[sfbi];
sfbi += 3;
}
} else {
if (channel.flags & tables.PREFLAG) {
for (var sfbi = 0; sfbi < 22; sfbi++) {
exponents[sfbi] = gain - ((channel.scalefac[sfbi] + tables.PRETAB[sfbi]) << scalefac_multiplier);
}
} else {
for (var sfbi = 0; sfbi < 22; sfbi++) {
exponents[sfbi] = gain - (channel.scalefac[sfbi] << scalefac_multiplier);
}
}
}
};
Layer3.prototype.stereo = function(xr, granules, gr, header, sfbwidth) {
var granule = granules[gr];
var modes = this.modes;
var sfbi, l, n, i;
if (granule.ch[0].block_type !== granule.ch[1].block_type || (granule.ch[0].flags & tables.MIXED_BLOCK_FLAG) !== (granule.ch[1].flags & tables.MIXED_BLOCK_FLAG))
throw new Error('incompatible stereo block_type');
for (var i = 0; i < 39; i++)
modes[i] = header.mode_extension;
// intensity stereo
if (header.mode_extension & tables.I_STEREO) {
var right_ch = granule.ch[1];
var right_xr = xr[1];
header.flags |= MP3FrameHeader.FLAGS.I_STEREO;
// first determine which scalefactor bands are to be processed
if (right_ch.block_type === 2) {
var lower, start, max, bound = new Uint32Array(3), w;
lower = start = max = bound[0] = bound[1] = bound[2] = 0;
sfbi = l = 0;
if (right_ch.flags & tables.MIXED_BLOCK_FLAG) {
while (l < 36) {
n = sfbwidth[sfbi++];
for (var i = 0; i < n; ++i) {
if (right_xr[i]) {
lower = sfbi;
break;
}
}
right_xr += n;
l += n;
}
start = sfbi;
}
var w = 0;
while (l < 576) {
n = sfbwidth[sfbi++];
for (i = 0; i < n; ++i) {
if (right_xr[i]) {
max = bound[w] = sfbi;
break;
}
}
right_xr += n;
l += n;
w = (w + 1) % 3;
}
if (max)
lower = start;
// long blocks
for (i = 0; i < lower; ++i)
modes[i] = header.mode_extension & ~tables.I_STEREO;
// short blocks
w = 0;
for (i = start; i < max; ++i) {
if (i < bound[w])
modes[i] = header.mode_extension & ~tables.I_STEREO;
w = (w + 1) % 3;
}
} else {
var bound = 0;
for (sfbi = l = 0; l < 576; l += n) {
n = sfbwidth[sfbi++];
for (i = 0; i < n; ++i) {
if (right_xr[i]) {
bound = sfbi;
break;
}
}
right_xr += n;
}
for (i = 0; i < bound; ++i)
modes[i] = header.mode_extension & ~tables.I_STEREO;
}
// now do the actual processing
if (header.flags & MP3FrameHeader.FLAGS.LSF_EXT) {
var illegal_pos = granules[gr + 1].ch[1].scalefac;
// intensity_scale
var lsf_scale = IS_Ltables.SF_TABLE[right_ch.scalefac_compress & 0x1];
for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
n = sfbwidth[sfbi];
if (!(modes[sfbi] & tables.I_STEREO))
continue;
if (illegal_pos[sfbi]) {
modes[sfbi] &= ~tables.I_STEREO;
continue;
}
is_pos = right_ch.scalefac[sfbi];
for (i = 0; i < n; ++i) {
var left = xr[0][l + i];
if (is_pos === 0) {
xr[1][l + i] = left;
} else {
var opposite = left * lsf_scale[(is_pos - 1) / 2];
if (is_pos & 1) {
xr[0][l + i] = opposite;
xr[1][l + i] = left;
}
else {
xr[1][l + i] = opposite;
}
}
}
}
} else {
for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
n = sfbwidth[sfbi];
if (!(modes[sfbi] & tables.I_STEREO))
continue;
is_pos = right_ch.scalefac[sfbi];
if (is_pos >= 7) { // illegal intensity position
modes[sfbi] &= ~tables.I_STEREO;
continue;
}
for (i = 0; i < n; ++i) {
var left = xr[0][l + i];
xr[0][l + i] = left * tables.IS_TABLE[is_pos];
xr[1][l + i] = left * tables.IS_TABLE[6 - is_pos];
}
}
}
}
// middle/side stereo
if (header.mode_extension & tables.MS_STEREO) {
header.flags |= tables.MS_STEREO;
var invsqrt2 = tables.ROOT_TABLE[3 + -2];
for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
n = sfbwidth[sfbi];
if (modes[sfbi] !== tables.MS_STEREO)
continue;
for (i = 0; i < n; ++i) {
var m = xr[0][l + i];
var s = xr[1][l + i];
xr[0][l + i] = (m + s) * invsqrt2; // l = (m + s) / sqrt(2)
xr[1][l + i] = (m - s) * invsqrt2; // r = (m - s) / sqrt(2)
}
}
}
};
Layer3.prototype.aliasreduce = function(xr, lines) {
for (var xrPointer = 18; xrPointer < lines; xrPointer += 18) {
for (var i = 0; i < 8; ++i) {
var a = xr[xrPointer - i - 1];
var b = xr[xrPointer + i];
xr[xrPointer - i - 1] = a * tables.CS[i] - b * tables.CA[i];
xr[xrPointer + i] = b * tables.CS[i] + a * tables.CA[i];
}
}
};
// perform IMDCT and windowing for long blocks
Layer3.prototype.imdct_l = function (X, z, block_type) {
// IMDCT
this.imdct.imdct36(X, z);
// windowing
switch (block_type) {
case 0: // normal window
for (var i = 0; i < 36; ++i) z[i] = z[i] * tables.WINDOW_L[i];
break;
case 1: // start block
for (var i = 0; i < 18; ++i) z[i] = z[i] * tables.WINDOW_L[i];
for (var i = 24; i < 30; ++i) z[i] = z[i] * tables.WINDOW_S[i - 18];
for (var i = 30; i < 36; ++i) z[i] = 0;
break;
case 3: // stop block
for (var i = 0; i < 6; ++i) z[i] = 0;
for (var i = 6; i < 12; ++i) z[i] = z[i] * tables.WINDOW_S[i - 6];
for (var i = 18; i < 36; ++i) z[i] = z[i] * tables.WINDOW_L[i];
break;
}
};
/*
* perform IMDCT and windowing for short blocks
*/
Layer3.prototype.imdct_s = function (X, z) {
var yptr = 0;
var wptr;
var Xptr = 0;
var y = new Float64Array(36);
var hi, lo;
// IMDCT
for (var w = 0; w < 3; ++w) {
var sptr = 0;
for (var i = 0; i < 3; ++i) {
lo = X[Xptr + 0] * IMDCT.S[sptr][0] +
X[Xptr + 1] * IMDCT.S[sptr][1] +
X[Xptr + 2] * IMDCT.S[sptr][2] +
X[Xptr + 3] * IMDCT.S[sptr][3] +
X[Xptr + 4] * IMDCT.S[sptr][4] +
X[Xptr + 5] * IMDCT.S[sptr][5];
y[yptr + i + 0] = lo;
y[yptr + 5 - i] = -y[yptr + i + 0];
++sptr;
lo = X[Xptr + 0] * IMDCT.S[sptr][0] +
X[Xptr + 1] * IMDCT.S[sptr][1] +
X[Xptr + 2] * IMDCT.S[sptr][2] +
X[Xptr + 3] * IMDCT.S[sptr][3] +
X[Xptr + 4] * IMDCT.S[sptr][4] +
X[Xptr + 5] * IMDCT.S[sptr][5];
y[yptr + i + 6] = lo;
y[yptr + 11 - i] = y[yptr + i + 6];
++sptr;
}
yptr += 12;
Xptr += 6;
}
// windowing, overlapping and concatenation
yptr = 0;
var wptr = 0;
for (var i = 0; i < 6; ++i) {
z[i + 0] = 0;
z[i + 6] = y[yptr + 0 + 0] * tables.WINDOW_S[wptr + 0];
lo = y[yptr + 0 + 6] * tables.WINDOW_S[wptr + 6] +
y[yptr + 12 + 0] * tables.WINDOW_S[wptr + 0];
z[i + 12] = lo;
lo = y[yptr + 12 + 6] * tables.WINDOW_S[wptr + 6] +
y[yptr + 24 + 0] * tables.WINDOW_S[wptr + 0];
z[i + 18] = lo;
z[i + 24] = y[yptr + 24 + 6] * tables.WINDOW_S[wptr + 6];
z[i + 30] = 0;
++yptr;
++wptr;
}
};
Layer3.prototype.overlap = function (output, overlap, sample, sb) {
for (var i = 0; i < 18; ++i) {
sample[i][sb] = output[i] + overlap[i];
overlap[i] = output[i + 18];
}
};
Layer3.prototype.freqinver = function (sample, sb) {
for (var i = 1; i < 18; i += 2)
sample[i][sb] = -sample[i][sb];
};
Layer3.prototype.overlap_z = function (overlap, sample, sb) {
for (var i = 0; i < 18; ++i) {
sample[i][sb] = overlap[i];
overlap[i] = 0;
}
};
Layer3.prototype.reorder = function (xr, channel, sfbwidth) {
var sfbwidthPointer = 0;
var tmp = this.tmp;
var sbw = new Uint32Array(3);
var sw = new Uint32Array(3);
// this is probably wrong for 8000 Hz mixed blocks
var sb = 0;
if (channel.flags & tables.MIXED_BLOCK_FLAG) {
var sb = 2;
var l = 0;
while (l < 36)
l += sfbwidth[sfbwidthPointer++];
}
for (var w = 0; w < 3; ++w) {
sbw[w] = sb;
sw[w] = 0;
}
f = sfbwidth[sfbwidthPointer++];
w = 0;
for (var l = 18 * sb; l < 576; ++l) {
if (f-- === 0) {
f = sfbwidth[sfbwidthPointer++] - 1;
w = (w + 1) % 3;
}
tmp[sbw[w]][w][sw[w]++] = xr[l];
if (sw[w] === 6) {
sw[w] = 0;
++sbw[w];
}
}
var tmp2 = this.tmp2;
var ptr = 0;
for (var i = 0; i < 32; i++) {
for (var j = 0; j < 3; j++) {
for (var k = 0; k < 6; k++) {
tmp2[ptr++] = tmp[i][j][k];
}
}
}
var len = (576 - 18 * sb);
for (var i = 0; i < len; i++) {
xr[18 * sb + i] = tmp2[sb + i];
}
};
module.exports = Layer3;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./frame":4,"./header":5,"./huffman":6,"./imdct":8,"./tables":14,"./utils":15}],12:[function(require,module,exports){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
var MP3FrameHeader = require('./header');
function MP3Stream(stream) {
this.stream = stream; // actual bitstream
this.sync = false; // stream sync found
this.freerate = 0; // free bitrate (fixed)
this.this_frame = stream.stream.offset; // start of current frame
this.next_frame = stream.stream.offset; // start of next frame
this.main_data = new Uint8Array(MP3FrameHeader.BUFFER_MDLEN); // actual audio data
this.md_len = 0; // length of main data
// copy methods from actual stream
for (var key in stream) {
if (typeof stream[key] === 'function')
this[key] = stream[key].bind(stream);
}
}
MP3Stream.prototype.getU8 = function(offset) {
var stream = this.stream.stream;
return stream.peekUInt8(offset - stream.offset);
};
MP3Stream.prototype.nextByte = function() {
var stream = this.stream;
return stream.bitPosition === 0 ? stream.stream.offset : stream.stream.offset + 1;
};
MP3Stream.prototype.doSync = function() {
var stream = this.stream.stream;
this.align();
while (this.available(16) && !(stream.peekUInt8(0) === 0xff && (stream.peekUInt8(1) & 0xe0) === 0xe0)) {
this.advance(8);
}
if (!this.available(MP3FrameHeader.BUFFER_GUARD))
return false;
return true;
};
MP3Stream.prototype.reset = function(byteOffset) {
this.seek(byteOffset * 8);
this.next_frame = byteOffset;
this.sync = true;
};
module.exports = MP3Stream;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./header":5}],13:[function(require,module,exports){
var utils = require('./utils');
function MP3Synth() {
this.filter = utils.makeArray([2, 2, 2, 16, 8]); // polyphase filterbank outputs
this.phase = 0;
this.pcm = {
samplerate: 0,
channels: 0,
length: 0,
samples: [new Float64Array(1152), new Float64Array(1152)]
};
}
/* costab[i] = cos(PI / (2 * 32) * i) */
const costab1 = 0.998795456;
const costab2 = 0.995184727;
const costab3 = 0.989176510;
const costab4 = 0.980785280;
const costab5 = 0.970031253;
const costab6 = 0.956940336;
const costab7 = 0.941544065;
const costab8 = 0.923879533;
const costab9 = 0.903989293;
const costab10 = 0.881921264;
const costab11 = 0.857728610;
const costab12 = 0.831469612;
const costab13 = 0.803207531;
const costab14 = 0.773010453;
const costab15 = 0.740951125;
const costab16 = 0.707106781;
const costab17 = 0.671558955;
const costab18 = 0.634393284;
const costab19 = 0.595699304;
const costab20 = 0.555570233;
const costab21 = 0.514102744;
const costab22 = 0.471396737;
const costab23 = 0.427555093;
const costab24 = 0.382683432;
const costab25 = 0.336889853;
const costab26 = 0.290284677;
const costab27 = 0.242980180;
const costab28 = 0.195090322;
const costab29 = 0.146730474;
const costab30 = 0.098017140;
const costab31 = 0.049067674;
/*
* NAME: dct32()
* DESCRIPTION: perform fast in[32].out[32] DCT
*/
MP3Synth.dct32 = function (_in, slot, lo, hi) {
var t0, t1, t2, t3, t4, t5, t6, t7;
var t8, t9, t10, t11, t12, t13, t14, t15;
var t16, t17, t18, t19, t20, t21, t22, t23;
var t24, t25, t26, t27, t28, t29, t30, t31;
var t32, t33, t34, t35, t36, t37, t38, t39;
var t40, t41, t42, t43, t44, t45, t46, t47;
var t48, t49, t50, t51, t52, t53, t54, t55;
var t56, t57, t58, t59, t60, t61, t62, t63;
var t64, t65, t66, t67, t68, t69, t70, t71;
var t72, t73, t74, t75, t76, t77, t78, t79;
var t80, t81, t82, t83, t84, t85, t86, t87;
var t88, t89, t90, t91, t92, t93, t94, t95;
var t96, t97, t98, t99, t100, t101, t102, t103;
var t104, t105, t106, t107, t108, t109, t110, t111;
var t112, t113, t114, t115, t116, t117, t118, t119;
var t120, t121, t122, t123, t124, t125, t126, t127;
var t128, t129, t130, t131, t132, t133, t134, t135;
var t136, t137, t138, t139, t140, t141, t142, t143;
var t144, t145, t146, t147, t148, t149, t150, t151;
var t152, t153, t154, t155, t156, t157, t158, t159;
var t160, t161, t162, t163, t164, t165, t166, t167;
var t168, t169, t170, t171, t172, t173, t174, t175;
var t176;
t0 = _in[0] + _in[31]; t16 = ((_in[0] - _in[31]) * (costab1));
t1 = _in[15] + _in[16]; t17 = ((_in[15] - _in[16]) * (costab31));
t41 = t16 + t17;
t59 = ((t16 - t17) * (costab2));
t33 = t0 + t1;
t50 = ((t0 - t1) * ( costab2));
t2 = _in[7] + _in[24]; t18 = ((_in[7] - _in[24]) * (costab15));
t3 = _in[8] + _in[23]; t19 = ((_in[8] - _in[23]) * (costab17));
t42 = t18 + t19;
t60 = ((t18 - t19) * (costab30));
t34 = t2 + t3;
t51 = ((t2 - t3) * ( costab30));
t4 = _in[3] + _in[28]; t20 = ((_in[3] - _in[28]) * (costab7));
t5 = _in[12] + _in[19]; t21 = ((_in[12] - _in[19]) * (costab25));
t43 = t20 + t21;
t61 = ((t20 - t21) * (costab14));
t35 = t4 + t5;
t52 = ((t4 - t5) * ( costab14));
t6 = _in[4] + _in[27]; t22 = ((_in[4] - _in[27]) * (costab9));
t7 = _in[11] + _in[20]; t23 = ((_in[11] - _in[20]) * (costab23));
t44 = t22 + t23;
t62 = ((t22 - t23) * (costab18));
t36 = t6 + t7;
t53 = ((t6 - t7) * ( costab18));
t8 = _in[1] + _in[30]; t24 = ((_in[1] - _in[30]) * (costab3));
t9 = _in[14] + _in[17]; t25 = ((_in[14] - _in[17]) * (costab29));
t45 = t24 + t25;
t63 = ((t24 - t25) * (costab6));
t37 = t8 + t9;
t54 = ((t8 - t9) * ( costab6));
t10 = _in[6] + _in[25]; t26 = ((_in[6] - _in[25]) * (costab13));
t11 = _in[9] + _in[22]; t27 = ((_in[9] - _in[22]) * (costab19));
t46 = t26 + t27;
t64 = ((t26 - t27) * (costab26));
t38 = t10 + t11;
t55 = ((t10 - t11) * (costab26));
t12 = _in[2] + _in[29]; t28 = ((_in[2] - _in[29]) * (costab5));
t13 = _in[13] + _in[18]; t29 = ((_in[13] - _in[18]) * (costab27));
t47 = t28 + t29;
t65 = ((t28 - t29) * (costab10));
t39 = t12 + t13;
t56 = ((t12 - t13) * (costab10));
t14 = _in[5] + _in[26]; t30 = ((_in[5] - _in[26]) * (costab11));
t15 = _in[10] + _in[21]; t31 = ((_in[10] - _in[21]) * (costab21));
t48 = t30 + t31;
t66 = ((t30 - t31) * (costab22));
t40 = t14 + t15;
t57 = ((t14 - t15) * (costab22));
t69 = t33 + t34; t89 = ((t33 - t34) * (costab4));
t70 = t35 + t36; t90 = ((t35 - t36) * (costab28));
t71 = t37 + t38; t91 = ((t37 - t38) * (costab12));
t72 = t39 + t40; t92 = ((t39 - t40) * (costab20));
t73 = t41 + t42; t94 = ((t41 - t42) * (costab4));
t74 = t43 + t44; t95 = ((t43 - t44) * (costab28));
t75 = t45 + t46; t96 = ((t45 - t46) * (costab12));
t76 = t47 + t48; t97 = ((t47 - t48) * (costab20));
t78 = t50 + t51; t100 = ((t50 - t51) * (costab4));
t79 = t52 + t53; t101 = ((t52 - t53) * (costab28));
t80 = t54 + t55; t102 = ((t54 - t55) * (costab12));
t81 = t56 + t57; t103 = ((t56 - t57) * (costab20));
t83 = t59 + t60; t106 = ((t59 - t60) * (costab4));
t84 = t61 + t62; t107 = ((t61 - t62) * (costab28));
t85 = t63 + t64; t108 = ((t63 - t64) * (costab12));
t86 = t65 + t66; t109 = ((t65 - t66) * (costab20));
t113 = t69 + t70;
t114 = t71 + t72;
/* 0 */ hi[15][slot] = t113 + t114;
/* 16 */ lo[ 0][slot] = ((t113 - t114) * (costab16));
t115 = t73 + t74;
t116 = t75 + t76;
t32 = t115 + t116;
/* 1 */ hi[14][slot] = t32;
t118 = t78 + t79;
t119 = t80 + t81;
t58 = t118 + t119;
/* 2 */ hi[13][slot] = t58;
t121 = t83 + t84;
t122 = t85 + t86;
t67 = t121 + t122;
t49 = (t67 * 2) - t32;
/* 3 */ hi[12][slot] = t49;
t125 = t89 + t90;
t126 = t91 + t92;
t93 = t125 + t126;
/* 4 */ hi[11][slot] = t93;
t128 = t94 + t95;
t129 = t96 + t97;
t98 = t128 + t129;
t68 = (t98 * 2) - t49;
/* 5 */ hi[10][slot] = t68;
t132 = t100 + t101;
t133 = t102 + t103;
t104 = t132 + t133;
t82 = (t104 * 2) - t58;
/* 6 */ hi[ 9][slot] = t82;
t136 = t106 + t107;
t137 = t108 + t109;
t110 = t136 + t137;
t87 = (t110 * 2) - t67;
t77 = (t87 * 2) - t68;
/* 7 */ hi[ 8][slot] = t77;
t141 = ((t69 - t70) * (costab8));
t142 = ((t71 - t72) * (costab24));
t143 = t141 + t142;
/* 8 */ hi[ 7][slot] = t143;
/* 24 */ lo[ 8][slot] =
(((t141 - t142) * (costab16) * 2)) - t143;
t144 = ((t73 - t74) * (costab8));
t145 = ((t75 - t76) * (costab24));
t146 = t144 + t145;
t88 = (t146 * 2) - t77;
/* 9 */ hi[ 6][slot] = t88;
t148 = ((t78 - t79) * (costab8));
t149 = ((t80 - t81) * (costab24));
t150 = t148 + t149;
t105 = (t150 * 2) - t82;
/* 10 */ hi[ 5][slot] = t105;
t152 = ((t83 - t84) * (costab8));
t153 = ((t85 - t86) * (costab24));
t154 = t152 + t153;
t111 = (t154 * 2) - t87;
t99 = (t111 * 2) - t88;
/* 11 */ hi[ 4][slot] = t99;
t157 = ((t89 - t90) * (costab8));
t158 = ((t91 - t92) * (costab24));
t159 = t157 + t158;
t127 = (t159 * 2) - t93;
/* 12 */ hi[ 3][slot] = t127;
t160 = (((t125 - t126) * (costab16) * 2)) - t127;
/* 20 */ lo[ 4][slot] = t160;
/* 28 */ lo[12][slot] =
(((((t157 - t158) * (costab16) * 2) - t159) * 2)) - t160;
t161 = ((t94 - t95) * (costab8));
t162 = ((t96 - t97) * (costab24));
t163 = t161 + t162;
t130 = (t163 * 2) - t98;
t112 = (t130 * 2) - t99;
/* 13 */ hi[ 2][slot] = t112;
t164 = (((t128 - t129) * (costab16) * 2)) - t130;
t166 = ((t100 - t101) * (costab8));
t167 = ((t102 - t103) * (costab24));
t168 = t166 + t167;
t134 = (t168 * 2) - t104;
t120 = (t134 * 2) - t105;
/* 14 */ hi[ 1][slot] = t120;
t135 = (((t118 - t119) * (costab16) * 2)) - t120;
/* 18 */ lo[ 2][slot] = t135;
t169 = (((t132 - t133) * (costab16) * 2)) - t134;
t151 = (t169 * 2) - t135;
/* 22 */ lo[ 6][slot] = t151;
t170 = (((((t148 - t149) * (costab16) * 2) - t150) * 2)) - t151;
/* 26 */ lo[10][slot] = t170;
/* 30 */ lo[14][slot] =
(((((((t166 - t167) * (costab16)) * 2 -
t168) * 2) - t169) * 2) - t170);
t171 = ((t106 - t107) * (costab8));
t172 = ((t108 - t109) * (costab24));
t173 = t171 + t172;
t138 = (t173 * 2) - t110;
t123 = (t138 * 2) - t111;
t139 = (((t121 - t122) * (costab16) * 2)) - t123;
t117 = (t123 * 2) - t112;
/* 15 */ hi[ 0][slot] = t117;
t124 = (((t115 - t116) * (costab16) * 2)) - t117;
/* 17 */ lo[ 1][slot] = t124;
t131 = (t139 * 2) - t124;
/* 19 */ lo[ 3][slot] = t131;
t140 = (t164 * 2) - t131;
/* 21 */ lo[ 5][slot] = t140;
t174 = (((t136 - t137) * (costab16) * 2)) - t138;
t155 = (t174 * 2) - t139;
t147 = (t155 * 2) - t140;
/* 23 */ lo[ 7][slot] = t147;
t156 = (((((t144 - t145) * (costab16) * 2) - t146) * 2)) - t147;
/* 25 */ lo[ 9][slot] = t156;
t175 = (((((t152 - t153) * (costab16) * 2) - t154) * 2)) - t155;
t165 = (t175 * 2) - t156;
/* 27 */ lo[11][slot] = t165;
t176 = (((((((t161 - t162) * (costab16) * 2)) -
t163) * 2) - t164) * 2) - t165;
/* 29 */ lo[13][slot] = t176;
/* 31 */ lo[15][slot] =
(((((((((t171 - t172) * (costab16)) * 2 -
t173) * 2) - t174) * 2) - t175) * 2) - t176);
/*
* Totals:
* 80 multiplies
* 80 additions
* 119 subtractions
* 49 shifts (not counting SSO)
*/
};
/*
* These are the coefficients for the subband synthesis window. This is a
* reordered version of Table B.3 from ISO/IEC 11172-3.
*/
const D = [
[ 0.000000000, /* 0 */
-0.000442505,
0.003250122,
-0.007003784,
0.031082153,
-0.078628540,
0.100311279,
-0.572036743,
1.144989014,
0.572036743,
0.100311279,
0.078628540,
0.031082153,
0.007003784,
0.003250122,
0.000442505,
0.000000000,
-0.000442505,
0.003250122,
-0.007003784,
0.031082153,
-0.078628540,
0.100311279,
-0.572036743,
1.144989014,
0.572036743,
0.100311279,
0.078628540,
0.031082153,
0.007003784,
0.003250122,
0.000442505 ],
[ -0.000015259, /* 1 */
-0.000473022,
0.003326416,
-0.007919312,
0.030517578,
-0.084182739,
0.090927124,
-0.600219727,
1.144287109,
0.543823242,
0.108856201,
0.073059082,
0.031478882,
0.006118774,
0.003173828,
0.000396729,
-0.000015259,
-0.000473022,
0.003326416,
-0.007919312,
0.030517578,
-0.084182739,
0.090927124,
-0.600219727,
1.144287109,
0.543823242,
0.108856201,
0.073059082,
0.031478882,
0.006118774,
0.003173828,
0.000396729 ],
[ -0.000015259, /* 2 */
-0.000534058,
0.003387451,
-0.008865356,
0.029785156,
-0.089706421,
0.080688477,
-0.628295898,
1.142211914,
0.515609741,
0.116577148,
0.067520142,
0.031738281,
0.005294800,
0.003082275,
0.000366211,
-0.000015259,
-0.000534058,
0.003387451,
-0.008865356,
0.029785156,
-0.089706421,
0.080688477,
-0.628295898,
1.142211914,
0.515609741,
0.116577148,
0.067520142,
0.031738281,
0.005294800,
0.003082275,
0.000366211 ],
[ -0.000015259, /* 3 */
-0.000579834,
0.003433228,
-0.009841919,
0.028884888,
-0.095169067,
0.069595337,
-0.656219482,
1.138763428,
0.487472534,
0.123474121,
0.061996460,
0.031845093,
0.004486084,
0.002990723,
0.000320435,
-0.000015259,
-0.000579834,
0.003433228,
-0.009841919,
0.028884888,
-0.095169067,
0.069595337,
-0.656219482,
1.138763428,
0.487472534,
0.123474121,
0.061996460,
0.031845093,
0.004486084,
0.002990723,
0.000320435 ],
[ -0.000015259, /* 4 */
-0.000625610,
0.003463745,
-0.010848999,
0.027801514,
-0.100540161,
0.057617187,
-0.683914185,
1.133926392,
0.459472656,
0.129577637,
0.056533813,
0.031814575,
0.003723145,
0.002899170,
0.000289917,
-0.000015259,
-0.000625610,
0.003463745,
-0.010848999,
0.027801514,
-0.100540161,
0.057617187,
-0.683914185,
1.133926392,
0.459472656,
0.129577637,
0.056533813,
0.031814575,
0.003723145,
0.002899170,
0.000289917 ],
[ -0.000015259, /* 5 */
-0.000686646,
0.003479004,
-0.011886597,
0.026535034,
-0.105819702,
0.044784546,
-0.711318970,
1.127746582,
0.431655884,
0.134887695,
0.051132202,
0.031661987,
0.003005981,
0.002792358,
0.000259399,
-0.000015259,
-0.000686646,
0.003479004,
-0.011886597,
0.026535034,
-0.105819702,
0.044784546,
-0.711318970,
1.127746582,
0.431655884,
0.134887695,
0.051132202,
0.031661987,
0.003005981,
0.002792358,
0.000259399 ],
[ -0.000015259, /* 6 */
-0.000747681,
0.003479004,
-0.012939453,
0.025085449,
-0.110946655,
0.031082153,
-0.738372803,
1.120223999,
0.404083252,
0.139450073,
0.045837402,
0.031387329,
0.002334595,
0.002685547,
0.000244141,
-0.000015259,
-0.000747681,
0.003479004,
-0.012939453,
0.025085449,
-0.110946655,
0.031082153,
-0.738372803,
1.120223999,
0.404083252,
0.139450073,
0.045837402,
0.031387329,
0.002334595,
0.002685547,
0.000244141 ],
[ -0.000030518, /* 7 */
-0.000808716,
0.003463745,
-0.014022827,
0.023422241,
-0.115921021,
0.016510010,
-0.765029907,
1.111373901,
0.376800537,
0.143264771,
0.040634155,
0.031005859,
0.001693726,
0.002578735,
0.000213623,
-0.000030518,
-0.000808716,
0.003463745,
-0.014022827,
0.023422241,
-0.115921021,
0.016510010,
-0.765029907,
1.111373901,
0.376800537,
0.143264771,
0.040634155,
0.031005859,
0.001693726,
0.002578735,
0.000213623 ],
[ -0.000030518, /* 8 */
-0.000885010,
0.003417969,
-0.015121460,
0.021575928,
-0.120697021,
0.001068115,
-0.791213989,
1.101211548,
0.349868774,
0.146362305,
0.035552979,
0.030532837,
0.001098633,
0.002456665,
0.000198364,
-0.000030518,
-0.000885010,
0.003417969,
-0.015121460,
0.021575928,
-0.120697021,
0.001068115,
-0.791213989,
1.101211548,
0.349868774,
0.146362305,
0.035552979,
0.030532837,
0.001098633,
0.002456665,
0.000198364 ],
[ -0.000030518, /* 9 */
-0.000961304,
0.003372192,
-0.016235352,
0.019531250,
-0.125259399,
-0.015228271,
-0.816864014,
1.089782715,
0.323318481,
0.148773193,
0.030609131,
0.029937744,
0.000549316,
0.002349854,
0.000167847,
-0.000030518,
-0.000961304,
0.003372192,
-0.016235352,
0.019531250,
-0.125259399,
-0.015228271,
-0.816864014,
1.089782715,
0.323318481,
0.148773193,
0.030609131,
0.029937744,
0.000549316,
0.002349854,
0.000167847 ],
[ -0.000030518, /* 10 */
-0.001037598,
0.003280640,
-0.017349243,
0.017257690,
-0.129562378,
-0.032379150,
-0.841949463,
1.077117920,
0.297210693,
0.150497437,
0.025817871,
0.029281616,
0.000030518,
0.002243042,
0.000152588,
-0.000030518,
-0.001037598,
0.003280640,
-0.017349243,
0.017257690,
-0.129562378,
-0.032379150,
-0.841949463,
1.077117920,
0.297210693,
0.150497437,
0.025817871,
0.029281616,
0.000030518,
0.002243042,
0.000152588 ],
[ -0.000045776, /* 11 */
-0.001113892,
0.003173828,
-0.018463135,
0.014801025,
-0.133590698,
-0.050354004,
-0.866363525,
1.063217163,
0.271591187,
0.151596069,
0.021179199,
0.028533936,
-0.000442505,
0.002120972,
0.000137329,
-0.000045776,
-0.001113892,
0.003173828,
-0.018463135,
0.014801025,
-0.133590698,
-0.050354004,
-0.866363525,
1.063217163,
0.271591187,
0.151596069,
0.021179199,
0.028533936,
-0.000442505,
0.002120972,
0.000137329 ],
[ -0.000045776, /* 12 */
-0.001205444,
0.003051758,
-0.019577026,
0.012115479,
-0.137298584,
-0.069168091,
-0.890090942,
1.048156738,
0.246505737,
0.152069092,
0.016708374,
0.027725220,
-0.000869751,
0.002014160,
0.000122070,
-0.000045776,
-0.001205444,
0.003051758,
-0.019577026,
0.012115479,
-0.137298584,
-0.069168091,
-0.890090942,
1.048156738,
0.246505737,
0.152069092,
0.016708374,
0.027725220,
-0.000869751,
0.002014160,
0.000122070 ],
[ -0.000061035, /* 13 */
-0.001296997,
0.002883911,
-0.020690918,
0.009231567,
-0.140670776,
-0.088775635,
-0.913055420,
1.031936646,
0.221984863,
0.151962280,
0.012420654,
0.026840210,
-0.001266479,
0.001907349,
0.000106812,
-0.000061035,
-0.001296997,
0.002883911,
-0.020690918,
0.009231567,
-0.140670776,
-0.088775635,
-0.913055420,
1.031936646,
0.221984863,
0.151962280,
0.012420654,
0.026840210,
-0.001266479,
0.001907349,
0.000106812 ],
[ -0.000061035, /* 14 */
-0.001388550,
0.002700806,
-0.021789551,
0.006134033,
-0.143676758,
-0.109161377,
-0.935195923,
1.014617920,
0.198059082,
0.151306152,
0.008316040,
0.025909424,
-0.001617432,
0.001785278,
0.000106812,
-0.000061035,
-0.001388550,
0.002700806,
-0.021789551,
0.006134033,
-0.143676758,
-0.109161377,
-0.935195923,
1.014617920,
0.198059082,
0.151306152,
0.008316040,
0.025909424,
-0.001617432,
0.001785278,
0.000106812 ],
[ -0.000076294, /* 15 */
-0.001480103,
0.002487183,
-0.022857666,
0.002822876,
-0.146255493,
-0.130310059,
-0.956481934,
0.996246338,
0.174789429,
0.150115967,
0.004394531,
0.024932861,
-0.001937866,
0.001693726,
0.000091553,
-0.000076294,
-0.001480103,
0.002487183,
-0.022857666,
0.002822876,
-0.146255493,
-0.130310059,
-0.956481934,
0.996246338,
0.174789429,
0.150115967,
0.004394531,
0.024932861,
-0.001937866,
0.001693726,
0.000091553 ],
[ -0.000076294, /* 16 */
-0.001586914,
0.002227783,
-0.023910522,
-0.000686646,
-0.148422241,
-0.152206421,
-0.976852417,
0.976852417,
0.152206421,
0.148422241,
0.000686646,
0.023910522,
-0.002227783,
0.001586914,
0.000076294,
-0.000076294,
-0.001586914,
0.002227783,
-0.023910522,
-0.000686646,
-0.148422241,
-0.152206421,
-0.976852417,
0.976852417,
0.152206421,
0.148422241,
0.000686646,
0.023910522,
-0.002227783,
0.001586914,
0.000076294 ]
];
/*
* perform full frequency PCM synthesis
*/
MP3Synth.prototype.full = function(frame, nch, ns) {
var Dptr, hi, lo, ptr;
for (var ch = 0; ch < nch; ++ch) {
var sbsample = frame.sbsample[ch];
var filter = this.filter[ch];
var phase = this.phase;
var pcm = this.pcm.samples[ch];
var pcm1Ptr = 0;
var pcm2Ptr = 0;
for (var s = 0; s < ns; ++s) {
MP3Synth.dct32(sbsample[s], phase >> 1, filter[0][phase & 1], filter[1][phase & 1]);
var pe = phase & ~1;
var po = ((phase - 1) & 0xf) | 1;
/* calculate 32 samples */
var fe = filter[0][ phase & 1];
var fx = filter[0][~phase & 1];
var fo = filter[1][~phase & 1];
var fePtr = 0;
var fxPtr = 0;
var foPtr = 0;
Dptr = 0;
ptr = D[Dptr];
_fx = fx[fxPtr];
_fe = fe[fePtr];
lo = _fx[0] * ptr[po + 0];
lo += _fx[1] * ptr[po + 14];
lo += _fx[2] * ptr[po + 12];
lo += _fx[3] * ptr[po + 10];
lo += _fx[4] * ptr[po + 8];
lo += _fx[5] * ptr[po + 6];
lo += _fx[6] * ptr[po + 4];
lo += _fx[7] * ptr[po + 2];
lo = -lo;
lo += _fe[0] * ptr[pe + 0];
lo += _fe[1] * ptr[pe + 14];
lo += _fe[2] * ptr[pe + 12];
lo += _fe[3] * ptr[pe + 10];
lo += _fe[4] * ptr[pe + 8];
lo += _fe[5] * ptr[pe + 6];
lo += _fe[6] * ptr[pe + 4];
lo += _fe[7] * ptr[pe + 2];
pcm[pcm1Ptr++] = lo;
pcm2Ptr = pcm1Ptr + 30;
for (var sb = 1; sb < 16; ++sb) {
++fePtr;
++Dptr;
/* D[32 - sb][i] === -D[sb][31 - i] */
ptr = D[Dptr];
_fo = fo[foPtr];
_fe = fe[fePtr];
lo = _fo[0] * ptr[po + 0];
lo += _fo[1] * ptr[po + 14];
lo += _fo[2] * ptr[po + 12];
lo += _fo[3] * ptr[po + 10];
lo += _fo[4] * ptr[po + 8];
lo += _fo[5] * ptr[po + 6];
lo += _fo[6] * ptr[po + 4];
lo += _fo[7] * ptr[po + 2];
lo = -lo;
lo += _fe[7] * ptr[pe + 2];
lo += _fe[6] * ptr[pe + 4];
lo += _fe[5] * ptr[pe + 6];
lo += _fe[4] * ptr[pe + 8];
lo += _fe[3] * ptr[pe + 10];
lo += _fe[2] * ptr[pe + 12];
lo += _fe[1] * ptr[pe + 14];
lo += _fe[0] * ptr[pe + 0];
pcm[pcm1Ptr++] = lo;
lo = _fe[0] * ptr[-pe + 31 - 16];
lo += _fe[1] * ptr[-pe + 31 - 14];
lo += _fe[2] * ptr[-pe + 31 - 12];
lo += _fe[3] * ptr[-pe + 31 - 10];
lo += _fe[4] * ptr[-pe + 31 - 8];
lo += _fe[5] * ptr[-pe + 31 - 6];
lo += _fe[6] * ptr[-pe + 31 - 4];
lo += _fe[7] * ptr[-pe + 31 - 2];
lo += _fo[7] * ptr[-po + 31 - 2];
lo += _fo[6] * ptr[-po + 31 - 4];
lo += _fo[5] * ptr[-po + 31 - 6];
lo += _fo[4] * ptr[-po + 31 - 8];
lo += _fo[3] * ptr[-po + 31 - 10];
lo += _fo[2] * ptr[-po + 31 - 12];
lo += _fo[1] * ptr[-po + 31 - 14];
lo += _fo[0] * ptr[-po + 31 - 16];
pcm[pcm2Ptr--] = lo;
++foPtr;
}
++Dptr;
ptr = D[Dptr];
_fo = fo[foPtr];
lo = _fo[0] * ptr[po + 0];
lo += _fo[1] * ptr[po + 14];
lo += _fo[2] * ptr[po + 12];
lo += _fo[3] * ptr[po + 10];
lo += _fo[4] * ptr[po + 8];
lo += _fo[5] * ptr[po + 6];
lo += _fo[6] * ptr[po + 4];
lo += _fo[7] * ptr[po + 2];
pcm[pcm1Ptr] = -lo;
pcm1Ptr += 16;
phase = (phase + 1) % 16;
}
}
};
// TODO: synth.half()
/*
* NAME: synth.frame()
* DESCRIPTION: perform PCM synthesis of frame subband samples
*/
MP3Synth.prototype.frame = function (frame) {
var nch = frame.header.nchannels();
var ns = frame.header.nbsamples();
this.pcm.samplerate = frame.header.samplerate;
this.pcm.channels = nch;
this.pcm.length = 32 * ns;
/*
if (frame.options & Mad.Option.HALFSAMPLERATE) {
this.pcm.samplerate /= 2;
this.pcm.length /= 2;
throw new Error("HALFSAMPLERATE is not supported. What do you think? As if I have the time for this");
}
*/
this.full(frame, nch, ns);
this.phase = (this.phase + ns) % 16;
};
module.exports = MP3Synth;
},{"./utils":15}],14:[function(require,module,exports){
/*
* These are the scalefactor values for Layer I and Layer II.
* The values are from Table B.1 of ISO/IEC 11172-3.
*
* Strictly speaking, Table B.1 has only 63 entries (0-62), thus a strict
* interpretation of ISO/IEC 11172-3 would suggest that a scalefactor index of
* 63 is invalid. However, for better compatibility with current practices, we
* add a 64th entry.
*/
exports.SF_TABLE = new Float32Array([
2.000000000000, 1.587401051968, 1.259921049895, 1.000000000000,
0.793700525984, 0.629960524947, 0.500000000000, 0.396850262992,
0.314980262474, 0.250000000000, 0.198425131496, 0.157490131237,
0.125000000000, 0.099212565748, 0.078745065618, 0.062500000000,
0.049606282874, 0.039372532809, 0.031250000000, 0.024803141437,
0.019686266405, 0.015625000000, 0.012401570719, 0.009843133202,
0.007812500000, 0.006200785359, 0.004921566601, 0.003906250000,
0.003100392680, 0.002460783301, 0.001953125000, 0.001550196340,
0.001230391650, 0.000976562500, 0.000775098170, 0.000615195825,
0.000488281250, 0.000387549085, 0.000307597913, 0.000244140625,
0.000193774542, 0.000153798956, 0.000122070313, 0.000096887271,
0.000076899478, 0.000061035156, 0.000048443636, 0.000038449739,
0.000030517578, 0.000024221818, 0.000019224870, 0.000015258789,
0.000012110909, 0.000009612435, 0.000007629395, 0.000006055454,
0.000004806217, 0.000003814697, 0.000003027727, 0.000002403109,
0.000001907349, 0.000001513864, 0.000001201554, 0.000000000000
]);
/*
* MPEG-1 scalefactor band widths
* derived from Table B.8 of ISO/IEC 11172-3
*/
const SFB_48000_LONG = new Uint8Array([
4, 4, 4, 4, 4, 4, 6, 6, 6, 8, 10,
12, 16, 18, 22, 28, 34, 40, 46, 54, 54, 192
]);
const SFB_44100_LONG = new Uint8Array([
4, 4, 4, 4, 4, 4, 6, 6, 8, 8, 10,
12, 16, 20, 24, 28, 34, 42, 50, 54, 76, 158
]);
const SFB_32000_LONG = new Uint8Array([
4, 4, 4, 4, 4, 4, 6, 6, 8, 10, 12,
16, 20, 24, 30, 38, 46, 56, 68, 84, 102, 26
]);
const SFB_48000_SHORT = new Uint8Array([
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6,
6, 6, 6, 6, 6, 10, 10, 10, 12, 12, 12, 14, 14,
14, 16, 16, 16, 20, 20, 20, 26, 26, 26, 66, 66, 66
]);
const SFB_44100_SHORT = new Uint8Array([
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6,
6, 6, 8, 8, 8, 10, 10, 10, 12, 12, 12, 14, 14,
14, 18, 18, 18, 22, 22, 22, 30, 30, 30, 56, 56, 56
]);
const SFB_32000_SHORT = new Uint8Array([
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6,
6, 6, 8, 8, 8, 12, 12, 12, 16, 16, 16, 20, 20,
20, 26, 26, 26, 34, 34, 34, 42, 42, 42, 12, 12, 12
]);
const SFB_48000_MIXED = new Uint8Array([
/* long */ 4, 4, 4, 4, 4, 4, 6, 6,
/* short */ 4, 4, 4, 6, 6, 6, 6, 6, 6, 10,
10, 10, 12, 12, 12, 14, 14, 14, 16, 16,
16, 20, 20, 20, 26, 26, 26, 66, 66, 66
]);
const SFB_44100_MIXED = new Uint8Array([
/* long */ 4, 4, 4, 4, 4, 4, 6, 6,
/* short */ 4, 4, 4, 6, 6, 6, 8, 8, 8, 10,
10, 10, 12, 12, 12, 14, 14, 14, 18, 18,
18, 22, 22, 22, 30, 30, 30, 56, 56, 56
]);
const SFB_32000_MIXED = new Uint8Array([
/* long */ 4, 4, 4, 4, 4, 4, 6, 6,
/* short */ 4, 4, 4, 6, 6, 6, 8, 8, 8, 12,
12, 12, 16, 16, 16, 20, 20, 20, 26, 26,
26, 34, 34, 34, 42, 42, 42, 12, 12, 12
]);
/*
* MPEG-2 scalefactor band widths
* derived from Table B.2 of ISO/IEC 13818-3
*/
const SFB_24000_LONG = new Uint8Array([
6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
18, 22, 26, 32, 38, 46, 54, 62, 70, 76, 36
]);
const SFB_22050_LONG = new Uint8Array([
6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54
]);
const SFB_16000_LONG = SFB_22050_LONG;
const SFB_24000_SHORT = new Uint8Array([
4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 8,
8, 8, 10, 10, 10, 12, 12, 12, 14, 14, 14, 18, 18,
18, 24, 24, 24, 32, 32, 32, 44, 44, 44, 12, 12, 12
]);
const SFB_22050_SHORT = new Uint8Array([
4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 6,
6, 6, 8, 8, 8, 10, 10, 10, 14, 14, 14, 18, 18,
18, 26, 26, 26, 32, 32, 32, 42, 42, 42, 18, 18, 18
]);
const SFB_16000_SHORT = new Uint8Array([
4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 8,
8, 8, 10, 10, 10, 12, 12, 12, 14, 14, 14, 18, 18,
18, 24, 24, 24, 30, 30, 30, 40, 40, 40, 18, 18, 18
]);
const SFB_24000_MIXED = new Uint8Array([
/* long */ 6, 6, 6, 6, 6, 6,
/* short */ 6, 6, 6, 8, 8, 8, 10, 10, 10, 12,
12, 12, 14, 14, 14, 18, 18, 18, 24, 24,
24, 32, 32, 32, 44, 44, 44, 12, 12, 12
]);
const SFB_22050_MIXED = new Uint8Array([
/* long */ 6, 6, 6, 6, 6, 6,
/* short */ 6, 6, 6, 6, 6, 6, 8, 8, 8, 10,
10, 10, 14, 14, 14, 18, 18, 18, 26, 26,
26, 32, 32, 32, 42, 42, 42, 18, 18, 18
]);
const SFB_16000_MIXED = new Uint8Array([
/* long */ 6, 6, 6, 6, 6, 6,
/* short */ 6, 6, 6, 8, 8, 8, 10, 10, 10, 12,
12, 12, 14, 14, 14, 18, 18, 18, 24, 24,
24, 30, 30, 30, 40, 40, 40, 18, 18, 18
]);
/*
* MPEG 2.5 scalefactor band widths
* derived from public sources
*/
const SFB_12000_LONG = SFB_16000_LONG;
const SFB_11025_LONG = SFB_12000_LONG;
const SFB_8000_LONG = new Uint8Array([
12, 12, 12, 12, 12, 12, 16, 20, 24, 28, 32,
40, 48, 56, 64, 76, 90, 2, 2, 2, 2, 2
]);
const SFB_12000_SHORT = SFB_16000_SHORT;
const SFB_11025_SHORT = SFB_12000_SHORT;
const SFB_8000_SHORT = new Uint8Array([
8, 8, 8, 8, 8, 8, 8, 8, 8, 12, 12, 12, 16,
16, 16, 20, 20, 20, 24, 24, 24, 28, 28, 28, 36, 36,
36, 2, 2, 2, 2, 2, 2, 2, 2, 2, 26, 26, 26
]);
const SFB_12000_MIXED = SFB_16000_MIXED;
const SFB_11025_MIXED = SFB_12000_MIXED;
/* the 8000 Hz short block scalefactor bands do not break after
the first 36 frequency lines, so this is probably wrong */
const SFB_8000_MIXED = new Uint8Array([
/* long */ 12, 12, 12,
/* short */ 4, 4, 4, 8, 8, 8, 12, 12, 12, 16, 16, 16,
20, 20, 20, 24, 24, 24, 28, 28, 28, 36, 36, 36,
2, 2, 2, 2, 2, 2, 2, 2, 2, 26, 26, 26
]);
exports.SFBWIDTH_TABLE = [
{ l: SFB_48000_LONG, s: SFB_48000_SHORT, m: SFB_48000_MIXED },
{ l: SFB_44100_LONG, s: SFB_44100_SHORT, m: SFB_44100_MIXED },
{ l: SFB_32000_LONG, s: SFB_32000_SHORT, m: SFB_32000_MIXED },
{ l: SFB_24000_LONG, s: SFB_24000_SHORT, m: SFB_24000_MIXED },
{ l: SFB_22050_LONG, s: SFB_22050_SHORT, m: SFB_22050_MIXED },
{ l: SFB_16000_LONG, s: SFB_16000_SHORT, m: SFB_16000_MIXED },
{ l: SFB_12000_LONG, s: SFB_12000_SHORT, m: SFB_12000_MIXED },
{ l: SFB_11025_LONG, s: SFB_11025_SHORT, m: SFB_11025_MIXED },
{ l: SFB_8000_LONG, s: SFB_8000_SHORT, m: SFB_8000_MIXED }
];
exports.PRETAB = new Uint8Array([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 2, 0
]);
/*
* fractional powers of two
* used for requantization and joint stereo decoding
*
* ROOT_TABLE[3 + x] = 2^(x/4)
*/
exports.ROOT_TABLE = new Float32Array([
/* 2^(-3/4) */ 0.59460355750136,
/* 2^(-2/4) */ 0.70710678118655,
/* 2^(-1/4) */ 0.84089641525371,
/* 2^( 0/4) */ 1.00000000000000,
/* 2^(+1/4) */ 1.18920711500272,
/* 2^(+2/4) */ 1.41421356237310,
/* 2^(+3/4) */ 1.68179283050743
]);
exports.CS = new Float32Array([
+0.857492926 , +0.881741997,
+0.949628649 , +0.983314592,
+0.995517816 , +0.999160558,
+0.999899195 , +0.999993155
]);
exports.CA = new Float32Array([
-0.514495755, -0.471731969,
-0.313377454, -0.181913200,
-0.094574193, -0.040965583,
-0.014198569, -0.003699975
]);
exports.COUNT1TABLE_SELECT = 0x01;
exports.SCALEFAC_SCALE = 0x02;
exports.PREFLAG = 0x04;
exports.MIXED_BLOCK_FLAG = 0x08;
exports.I_STEREO = 0x1;
exports.MS_STEREO = 0x2;
/*
* windowing coefficients for long blocks
* derived from section 2.4.3.4.10.3 of ISO/IEC 11172-3
*
* WINDOW_L[i] = sin((PI / 36) * (i + 1/2))
*/
exports.WINDOW_L = new Float32Array([
0.043619387, 0.130526192,
0.216439614, 0.300705800,
0.382683432, 0.461748613,
0.537299608, 0.608761429,
0.675590208, 0.737277337,
0.793353340, 0.843391446,
0.887010833, 0.923879533,
0.953716951, 0.976296007,
0.991444861, 0.999048222,
0.999048222, 0.991444861,
0.976296007, 0.953716951,
0.923879533, 0.887010833,
0.843391446, 0.793353340,
0.737277337, 0.675590208,
0.608761429, 0.537299608,
0.461748613, 0.382683432,
0.300705800, 0.216439614,
0.130526192, 0.043619387
]);
/*
* windowing coefficients for short blocks
* derived from section 2.4.3.4.10.3 of ISO/IEC 11172-3
*
* WINDOW_S[i] = sin((PI / 12) * (i + 1/2))
*/
exports.WINDOW_S = new Float32Array([
0.130526192, 0.382683432,
0.608761429, 0.793353340,
0.923879533, 0.991444861,
0.991444861, 0.923879533,
0.793353340, 0.608761429,
0.382683432, 0.130526192
]);
/*
* coefficients for intensity stereo processing
* derived from section 2.4.3.4.9.3 of ISO/IEC 11172-3
*
* is_ratio[i] = tan(i * (PI / 12))
* IS_TABLE[i] = is_ratio[i] / (1 + is_ratio[i])
*/
exports.IS_TABLE = new Float32Array([
0.000000000,
0.211324865,
0.366025404,
0.500000000,
0.633974596,
0.788675135,
1.000000000
]);
/*
* coefficients for LSF intensity stereo processing
* derived from section 2.4.3.2 of ISO/IEC 13818-3
*
* IS_LSF_TABLE[0][i] = (1 / sqrt(sqrt(2)))^(i + 1)
* IS_LSF_TABLE[1][i] = (1 / sqrt(2)) ^(i + 1)
*/
exports.IS_LSF_TABLE = [
new Float32Array([
0.840896415,
0.707106781,
0.594603558,
0.500000000,
0.420448208,
0.353553391,
0.297301779,
0.250000000,
0.210224104,
0.176776695,
0.148650889,
0.125000000,
0.105112052,
0.088388348,
0.074325445
]),
new Float32Array([
0.707106781,
0.500000000,
0.353553391,
0.250000000,
0.176776695,
0.125000000,
0.088388348,
0.062500000,
0.044194174,
0.031250000,
0.022097087,
0.015625000,
0.011048543,
0.007812500,
0.005524272
])
];
/*
* scalefactor bit lengths
* derived from section 2.4.2.7 of ISO/IEC 11172-3
*/
exports.SFLEN_TABLE = [
{ slen1: 0, slen2: 0 }, { slen1: 0, slen2: 1 }, { slen1: 0, slen2: 2 }, { slen1: 0, slen2: 3 },
{ slen1: 3, slen2: 0 }, { slen1: 1, slen2: 1 }, { slen1: 1, slen2: 2 }, { slen1: 1, slen2: 3 },
{ slen1: 2, slen2: 1 }, { slen1: 2, slen2: 2 }, { slen1: 2, slen2: 3 }, { slen1: 3, slen2: 1 },
{ slen1: 3, slen2: 2 }, { slen1: 3, slen2: 3 }, { slen1: 4, slen2: 2 }, { slen1: 4, slen2: 3 }
];
/*
* number of LSF scalefactor band values
* derived from section 2.4.3.2 of ISO/IEC 13818-3
*/
exports.NSFB_TABLE = [
[ [ 6, 5, 5, 5 ],
[ 9, 9, 9, 9 ],
[ 6, 9, 9, 9 ] ],
[ [ 6, 5, 7, 3 ],
[ 9, 9, 12, 6 ],
[ 6, 9, 12, 6 ] ],
[ [ 11, 10, 0, 0 ],
[ 18, 18, 0, 0 ],
[ 15, 18, 0, 0 ] ],
[ [ 7, 7, 7, 0 ],
[ 12, 12, 12, 0 ],
[ 6, 15, 12, 0 ] ],
[ [ 6, 6, 6, 3 ],
[ 12, 9, 9, 6 ],
[ 6, 12, 9, 6 ] ],
[ [ 8, 8, 5, 0 ],
[ 15, 12, 9, 0 ],
[ 6, 18, 9, 0 ] ]
];
},{}],15:[function(require,module,exports){
/**
* Makes a multidimensional array
*/
exports.makeArray = function(lengths, Type) {
if (!Type) Type = Float64Array;
if (lengths.length === 1) {
return new Type(lengths[0]);
}
var ret = [],
len = lengths[0];
for (var j = 0; j < len; j++) {
ret[j] = exports.makeArray(lengths.slice(1), Type);
}
return ret;
};
},{}]},{},[1])
//# sourceMappingURL=mp3.js.map