public/lib/modules/aurora.js/aac.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){
(function (global){
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
var tables = require('./tables');
var ADTSDemuxer = AV.Demuxer.extend(function() {
AV.Demuxer.register(this);
this.probe = function(stream) {
var offset = stream.offset;
// attempt to find ADTS syncword
while (stream.available(2)) {
if ((stream.readUInt16() & 0xfff6) === 0xfff0) {
stream.seek(offset);
return true;
}
}
stream.seek(offset);
return false;
};
this.prototype.init = function() {
this.bitstream = new AV.Bitstream(this.stream);
};
// Reads an ADTS header
// See http://wiki.multimedia.cx/index.php?title=ADTS
this.readHeader = function(stream) {
if (stream.read(12) !== 0xfff)
throw new Error('Invalid ADTS header.');
var ret = {};
stream.advance(3); // mpeg version and layer
var protectionAbsent = !!stream.read(1);
ret.profile = stream.read(2) + 1;
ret.samplingIndex = stream.read(4);
stream.advance(1); // private
ret.chanConfig = stream.read(3);
stream.advance(4); // original/copy, home, copywrite, and copywrite start
ret.frameLength = stream.read(13);
stream.advance(11); // fullness
ret.numFrames = stream.read(2) + 1;
if (!protectionAbsent)
stream.advance(16);
return ret;
};
this.prototype.readChunk = function() {
if (!this.sentHeader) {
var offset = this.stream.offset;
var header = ADTSDemuxer.readHeader(this.bitstream);
this.emit('format', {
formatID: 'aac ',
sampleRate: tables.SAMPLE_RATES[header.samplingIndex],
channelsPerFrame: header.chanConfig,
bitsPerChannel: 16
});
// generate a magic cookie from the ADTS header
var cookie = new Uint8Array(2);
cookie[0] = (header.profile << 3) | ((header.samplingIndex >> 1) & 7);
cookie[1] = ((header.samplingIndex & 1) << 7) | (header.chanConfig << 3);
this.emit('cookie', new AV.Buffer(cookie));
this.stream.seek(offset);
this.sentHeader = true;
}
while (this.stream.available(1)) {
var buffer = this.stream.readSingleBuffer(this.stream.remainingBytes());
this.emit('data', buffer);
}
};
});
module.exports = ADTSDemuxer;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./tables":11}],2:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
var ICStream = require('./ics');
var Huffman = require('./huffman');
// Channel Coupling Element
function CCEElement(config) {
this.ics = new ICStream(config);
this.channelPair = new Array(8);
this.idSelect = new Int32Array(8);
this.chSelect = new Int32Array(8);
this.gain = new Array(16);
}
CCEElement.BEFORE_TNS = 0;
CCEElement.AFTER_TNS = 1;
CCEElement.AFTER_IMDCT = 2;
const CCE_SCALE = new Float32Array([
1.09050773266525765921,
1.18920711500272106672,
1.4142135623730950488016887,
2.0
]);
CCEElement.prototype = {
decode: function(stream, config) {
var channelPair = this.channelPair,
idSelect = this.idSelect,
chSelect = this.chSelect;
this.couplingPoint = 2 * stream.read(1);
this.coupledCount = stream.read(3);
var gainCount = 0;
for (var i = 0; i <= this.coupledCount; i++) {
gainCount++;
channelPair[i] = stream.read(1);
idSelect[i] = stream.read(4);
if (channelPair[i]) {
chSelect[i] = stream.read(2);
if (chSelect[i] === 3)
gainCount++;
} else {
chSelect[i] = 2;
}
}
this.couplingPoint += stream.read(1);
this.couplingPoint |= (this.couplingPoint >>> 1);
var sign = stream.read(1),
scale = CCE_SCALE[stream.read(2)];
this.ics.decode(stream, config, false);
var groupCount = this.ics.info.groupCount,
maxSFB = this.ics.info.maxSFB,
bandTypes = this.ics.bandTypes;
for (var i = 0; i < gainCount; i++) {
var idx = 0,
cge = 1,
gain = 0,
gainCache = 1;
if (i > 0) {
cge = this.couplingPoint === CCEElement.AFTER_IMDCT ? 1 : stream.read(1);
gain = cge ? Huffman.decodeScaleFactor(stream) - 60 : 0;
gainCache = Math.pow(scale, -gain);
}
var gain_i = this.gain[i] = new Float32Array(120);
if (this.couplingPoint === CCEElement.AFTER_IMDCT) {
gain_i[0] = gainCache;
} else {
for (var g = 0; g < groupCount; g++) {
for (var sfb = 0; sfb < maxSFB; sfb++) {
if (bandTypes[idx] !== ICStream.ZERO_BT) {
if (cge === 0) {
var t = Huffman.decodeScaleFactor(stream) - 60;
if (t !== 0) {
var s = 1;
t = gain += t;
if (!sign) {
s -= 2 * (t & 0x1);
t >>>= 1;
}
gainCache = Math.pow(scale, -t) * s;
}
}
gain_i[idx++] = gainCache;
}
}
}
}
}
},
applyIndependentCoupling: function(index, data) {
var gain = this.gain[index][0],
iqData = this.ics.data;
for (var i = 0; i < data.length; i++) {
data[i] += gain * iqData[i];
}
},
applyDependentCoupling: function(index, data) {
var info = this.ics.info,
swbOffsets = info.swbOffsets,
groupCount = info.groupCount,
maxSFB = info.maxSFB,
bandTypes = this.ics.bandTypes,
iqData = this.ics.data;
var idx = 0,
offset = 0,
gains = this.gain[index];
for (var g = 0; g < groupCount; g++) {
var len = info.groupLength[g];
for (var sfb = 0; sfb < maxSFB; sfb++, idx++) {
if (bandTypes[idx] !== ICStream.ZERO_BT) {
var gain = gains[idx];
for (var group = 0; group < len; group++) {
for (var k = swbOffsets[sfb]; k < swbOffsets[swb + 1]; k++) {
data[offset + group * 128 + k] += gain * iqData[offset + group * 128 + k];
}
}
}
}
offset += len * 128;
}
}
};
module.exports = CCEElement;
},{"./huffman":7,"./ics":8}],3:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
var ICStream = require('./ics');
// Channel Pair Element
function CPEElement(config) {
this.ms_used = [];
this.left = new ICStream(config);
this.right = new ICStream(config);
}
const MAX_MS_MASK = 128;
const MASK_TYPE_ALL_0 = 0,
MASK_TYPE_USED = 1,
MASK_TYPE_ALL_1 = 2,
MASK_TYPE_RESERVED = 3;
CPEElement.prototype.decode = function(stream, config) {
var left = this.left,
right = this.right,
ms_used = this.ms_used;
if (this.commonWindow = !!stream.read(1)) {
left.info.decode(stream, config, true);
right.info = left.info;
var mask = stream.read(2);
this.maskPresent = !!mask;
switch (mask) {
case MASK_TYPE_USED:
var len = left.info.groupCount * left.info.maxSFB;
for (var i = 0; i < len; i++) {
ms_used[i] = !!stream.read(1);
}
break;
case MASK_TYPE_ALL_0:
case MASK_TYPE_ALL_1:
var val = !!mask;
for (var i = 0; i < MAX_MS_MASK; i++) {
ms_used[i] = val;
}
break;
default:
throw new Error("Reserved ms mask type: " + mask);
}
} else {
for (var i = 0; i < MAX_MS_MASK; i++)
ms_used[i] = false;
}
left.decode(stream, config, this.commonWindow);
right.decode(stream, config, this.commonWindow);
};
module.exports = CPEElement;
},{"./ics":8}],4:[function(require,module,exports){
(function (global){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
var AV = (typeof window !== "undefined" ? window['AV'] : typeof global !== "undefined" ? global['AV'] : null);
var ADTSDemuxer = require('./adts_demuxer');
var ICStream = require('./ics');
var CPEElement = require('./cpe');
var CCEElement = require('./cce');
var FilterBank = require('./filter_bank');
var tables = require('./tables');
var AACDecoder = AV.Decoder.extend(function() {
AV.Decoder.register('mp4a', this);
AV.Decoder.register('aac ', this);
// AAC profiles
const AOT_AAC_MAIN = 1, // no
AOT_AAC_LC = 2, // yes
AOT_AAC_LTP = 4, // no
AOT_ESCAPE = 31;
// Channel configurations
const CHANNEL_CONFIG_NONE = 0,
CHANNEL_CONFIG_MONO = 1,
CHANNEL_CONFIG_STEREO = 2,
CHANNEL_CONFIG_STEREO_PLUS_CENTER = 3,
CHANNEL_CONFIG_STEREO_PLUS_CENTER_PLUS_REAR_MONO = 4,
CHANNEL_CONFIG_FIVE = 5,
CHANNEL_CONFIG_FIVE_PLUS_ONE = 6,
CHANNEL_CONFIG_SEVEN_PLUS_ONE = 8;
this.prototype.init = function() {
this.format.floatingPoint = true;
}
this.prototype.setCookie = function(buffer) {
var data = AV.Stream.fromBuffer(buffer),
stream = new AV.Bitstream(data);
this.config = {};
this.config.profile = stream.read(5);
if (this.config.profile === AOT_ESCAPE)
this.config.profile = 32 + stream.read(6);
this.config.sampleIndex = stream.read(4);
if (this.config.sampleIndex === 0x0f) {
this.config.sampleRate = stream.read(24);
for (var i = 0; i < tables.SAMPLE_RATES.length; i++) {
if (tables.SAMPLE_RATES[i] === this.config.sampleRate) {
this.config.sampleIndex = i;
break;
}
}
} else {
this.config.sampleRate = tables.SAMPLE_RATES[this.config.sampleIndex];
}
this.config.chanConfig = stream.read(4);
this.format.channelsPerFrame = this.config.chanConfig; // sometimes m4a files encode this wrong
switch (this.config.profile) {
case AOT_AAC_MAIN:
case AOT_AAC_LC:
case AOT_AAC_LTP:
if (stream.read(1)) // frameLengthFlag
throw new Error('frameLengthFlag not supported');
this.config.frameLength = 1024;
if (stream.read(1)) // dependsOnCoreCoder
stream.advance(14); // coreCoderDelay
if (stream.read(1)) { // extensionFlag
if (this.config.profile > 16) { // error resiliant profile
this.config.sectionDataResilience = stream.read(1);
this.config.scalefactorResilience = stream.read(1);
this.config.spectralDataResilience = stream.read(1);
}
stream.advance(1);
}
if (this.config.chanConfig === CHANNEL_CONFIG_NONE) {
stream.advance(4) // element_instance_tag
throw new Error('PCE unimplemented');
}
break;
default:
throw new Error('AAC profile ' + this.config.profile + ' not supported.');
}
this.filter_bank = new FilterBank(false, this.config.chanConfig);
};
const SCE_ELEMENT = 0,
CPE_ELEMENT = 1,
CCE_ELEMENT = 2,
LFE_ELEMENT = 3,
DSE_ELEMENT = 4,
PCE_ELEMENT = 5,
FIL_ELEMENT = 6,
END_ELEMENT = 7;
// The main decoding function.
this.prototype.readChunk = function() {
var stream = this.bitstream;
// check if there is an ADTS header, and read it if so
if (stream.peek(12) === 0xfff)
ADTSDemuxer.readHeader(stream);
this.cces = [];
var elements = [],
config = this.config,
frameLength = config.frameLength,
elementType = null;
while ((elementType = stream.read(3)) !== END_ELEMENT) {
var id = stream.read(4);
switch (elementType) {
// single channel and low frequency elements
case SCE_ELEMENT:
case LFE_ELEMENT:
var ics = new ICStream(this.config);
ics.id = id;
elements.push(ics);
ics.decode(stream, config, false);
break;
// channel pair element
case CPE_ELEMENT:
var cpe = new CPEElement(this.config);
cpe.id = id;
elements.push(cpe);
cpe.decode(stream, config);
break;
// channel coupling element
case CCE_ELEMENT:
var cce = new CCEElement(this.config);
this.cces.push(cce);
cce.decode(stream, config);
break;
// data-stream element
case DSE_ELEMENT:
var align = stream.read(1),
count = stream.read(8);
if (count === 255)
count += stream.read(8);
if (align)
stream.align();
// skip for now...
stream.advance(count * 8);
break;
// program configuration element
case PCE_ELEMENT:
throw new Error("TODO: PCE_ELEMENT")
break;
// filler element
case FIL_ELEMENT:
if (id === 15)
id += stream.read(8) - 1;
// skip for now...
stream.advance(id * 8);
break;
default:
throw new Error('Unknown element')
}
}
stream.align();
this.process(elements);
// Interleave channels
var data = this.data,
channels = data.length,
output = new Float32Array(frameLength * channels),
j = 0;
for (var k = 0; k < frameLength; k++) {
for (var i = 0; i < channels; i++) {
output[j++] = data[i][k] / 32768;
}
}
return output;
};
this.prototype.process = function(elements) {
var channels = this.config.chanConfig;
// if (channels === 1 && psPresent)
// TODO: sbrPresent (2)
var mult = 1;
var len = mult * this.config.frameLength;
var data = this.data = [];
// Initialize channels
for (var i = 0; i < channels; i++) {
data[i] = new Float32Array(len);
}
var channel = 0;
for (var i = 0; i < elements.length && channel < channels; i++) {
var e = elements[i];
if (e instanceof ICStream) { // SCE or LFE element
channel += this.processSingle(e, channel);
} else if (e instanceof CPEElement) {
this.processPair(e, channel);
channel += 2;
} else if (e instanceof CCEElement) {
channel++;
} else {
throw new Error("Unknown element found.")
}
}
};
this.prototype.processSingle = function(element, channel) {
var profile = this.config.profile,
info = element.info,
data = element.data;
if (profile === AOT_AAC_MAIN)
throw new Error("Main prediction unimplemented");
if (profile === AOT_AAC_LTP)
throw new Error("LTP prediction unimplemented");
this.applyChannelCoupling(element, CCEElement.BEFORE_TNS, data, null);
if (element.tnsPresent)
element.tns.process(element, data, false);
this.applyChannelCoupling(element, CCEElement.AFTER_TNS, data, null);
// filterbank
this.filter_bank.process(info, data, this.data[channel], channel);
if (profile === AOT_AAC_LTP)
throw new Error("LTP prediction unimplemented");
this.applyChannelCoupling(element, CCEElement.AFTER_IMDCT, this.data[channel], null);
if (element.gainPresent)
throw new Error("Gain control not implemented");
if (this.sbrPresent)
throw new Error("SBR not implemented");
return 1;
};
this.prototype.processPair = function(element, channel) {
var profile = this.config.profile,
left = element.left,
right = element.right,
l_info = left.info,
r_info = right.info,
l_data = left.data,
r_data = right.data;
// Mid-side stereo
if (element.commonWindow && element.maskPresent)
this.processMS(element, l_data, r_data);
if (profile === AOT_AAC_MAIN)
throw new Error("Main prediction unimplemented");
// Intensity stereo
this.processIS(element, l_data, r_data);
if (profile === AOT_AAC_LTP)
throw new Error("LTP prediction unimplemented");
this.applyChannelCoupling(element, CCEElement.BEFORE_TNS, l_data, r_data);
if (left.tnsPresent)
left.tns.process(left, l_data, false);
if (right.tnsPresent)
right.tns.process(right, r_data, false);
this.applyChannelCoupling(element, CCEElement.AFTER_TNS, l_data, r_data);
// filterbank
this.filter_bank.process(l_info, l_data, this.data[channel], channel);
this.filter_bank.process(r_info, r_data, this.data[channel + 1], channel + 1);
if (profile === AOT_AAC_LTP)
throw new Error("LTP prediction unimplemented");
this.applyChannelCoupling(element, CCEElement.AFTER_IMDCT, this.data[channel], this.data[channel + 1]);
if (left.gainPresent)
throw new Error("Gain control not implemented");
if (right.gainPresent)
throw new Error("Gain control not implemented");
if (this.sbrPresent)
throw new Error("SBR not implemented");
};
// Intensity stereo
this.prototype.processIS = function(element, left, right) {
var ics = element.right,
info = ics.info,
offsets = info.swbOffsets,
windowGroups = info.groupCount,
maxSFB = info.maxSFB,
bandTypes = ics.bandTypes,
sectEnd = ics.sectEnd,
scaleFactors = ics.scaleFactors;
var idx = 0, groupOff = 0;
for (var g = 0; g < windowGroups; g++) {
for (var i = 0; i < maxSFB;) {
var end = sectEnd[idx];
if (bandTypes[idx] === ICStream.INTENSITY_BT || bandTypes[idx] === ICStream.INTENSITY_BT2) {
for (; i < end; i++, idx++) {
var c = bandTypes[idx] === ICStream.INTENSITY_BT ? 1 : -1;
if (element.maskPresent)
c *= element.ms_used[idx] ? -1 : 1;
var scale = c * scaleFactors[idx];
for (var w = 0; w < info.groupLength[g]; w++) {
var off = groupOff + w * 128 + offsets[i],
len = offsets[i + 1] - offsets[i];
for (var j = 0; j < len; j++) {
right[off + j] = left[off + j] * scale;
}
}
}
} else {
idx += end - i;
i = end;
}
}
groupOff += info.groupLength[g] * 128;
}
};
// Mid-side stereo
this.prototype.processMS = function(element, left, right) {
var ics = element.left,
info = ics.info,
offsets = info.swbOffsets,
windowGroups = info.groupCount,
maxSFB = info.maxSFB,
sfbCBl = ics.bandTypes,
sfbCBr = element.right.bandTypes;
var groupOff = 0, idx = 0;
for (var g = 0; g < windowGroups; g++) {
for (var i = 0; i < maxSFB; i++, idx++) {
if (element.ms_used[idx] && sfbCBl[idx] < ICStream.NOISE_BT && sfbCBr[idx] < ICStream.NOISE_BT) {
for (var w = 0; w < info.groupLength[g]; w++) {
var off = groupOff + w * 128 + offsets[i];
for (var j = 0; j < offsets[i + 1] - offsets[i]; j++) {
var t = left[off + j] - right[off + j];
left[off + j] += right[off + j];
right[off + j] = t;
}
}
}
}
groupOff += info.groupLength[g] * 128;
}
};
this.prototype.applyChannelCoupling = function(element, couplingPoint, data1, data2) {
var cces = this.cces,
isChannelPair = element instanceof CPEElement,
applyCoupling = couplingPoint === CCEElement.AFTER_IMDCT ? 'applyIndependentCoupling' : 'applyDependentCoupling';
for (var i = 0; i < cces.length; i++) {
var cce = cces[i],
index = 0;
if (cce.couplingPoint === couplingPoint) {
for (var c = 0; c < cce.coupledCount; c++) {
var chSelect = cce.chSelect[c];
if (cce.channelPair[c] === isChannelPair && cce.idSelect[c] === element.id) {
if (chSelect !== 1) {
cce[applyCoupling](index, data1);
if (chSelect) index++;
}
if (chSelect !== 2)
cce[applyCoupling](index++, data2);
} else {
index += 1 + (chSelect === 3 ? 1 : 0);
}
}
}
}
};
});
module.exports = AACDecoder;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./adts_demuxer":1,"./cce":2,"./cpe":3,"./filter_bank":6,"./ics":8,"./tables":11}],5:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
function FFT(length) {
this.length = length;
switch (length) {
case 64:
this.roots = generateFFTTableShort(64);
break;
case 512:
this.roots = generateFFTTableLong(512);
break;
case 60:
this.roots = generateFFTTableShort(60);
break;
case 480:
this.roots = generateFFTTableLong(480);
break;
default:
throw new Error("unexpected FFT length: " + length);
}
// processing buffers
this.rev = new Array(length);
for (var i = 0; i < length; i++) {
this.rev[i] = new Float32Array(2);
}
this.a = new Float32Array(2);
this.b = new Float32Array(2);
this.c = new Float32Array(2);
this.d = new Float32Array(2);
this.e1 = new Float32Array(2);
this.e2 = new Float32Array(2);
}
function generateFFTTableShort(len) {
var t = 2 * Math.PI / len,
cosT = Math.cos(t),
sinT = Math.sin(t),
f = new Array(len);
for (var i = 0; i < len; i++) {
f[i] = new Float32Array(2);
}
f[0][0] = 1;
f[0][1] = 0;
var lastImag = 0;
for (var i = 1; i < len; i++) {
f[i][0] = f[i - 1][0] * cosT + lastImag * sinT;
lastImag = lastImag * cosT - f[i - 1][0] * sinT;
f[i][1] = -lastImag;
}
return f;
}
function generateFFTTableLong(len) {
var t = 2 * Math.PI / len,
cosT = Math.cos(t),
sinT = Math.sin(t),
f = new Array(len);
for (var i = 0; i < len; i++) {
f[i] = new Float32Array(3);
}
f[0][0] = 1;
f[0][1] = 0;
f[0][2] = 0;
for (var i = 1; i < len; i++) {
f[i][0] = f[i - 1][0] * cosT + f[i - 1][2] * sinT;
f[i][2] = f[i - 1][2] * cosT - f[i - 1][0] * sinT;
f[i][1] = -f[i][2];
}
return f;
}
FFT.prototype.process = function(input, forward) {
var length = this.length,
imOffset = (forward ? 2 : 1),
scale = (forward ? length : 1),
rev = this.rev,
roots = this.roots;
// bit-reversal
var ii = 0;
for (var i = 0; i < length; i++) {
rev[i][0] = input[ii][0];
rev[i][1] = input[ii][1];
var k = length >>> 1;
while (ii >= k && k > 0) {
ii -= k;
k >>= 1;
}
ii += k;
}
var a = this.a,
b = this.b,
c = this.c,
d = this.d,
e1 = this.e1,
e2 = this.e2;
for (var i = 0; i < length; i++) {
input[i][0] = rev[i][0];
input[i][1] = rev[i][1];
}
// bottom base-4 round
for (var i = 0; i < length; i += 4) {
a[0] = input[i][0] + input[i + 1][0];
a[1] = input[i][1] + input[i + 1][1];
b[0] = input[i + 2][0] + input[i + 3][0];
b[1] = input[i + 2][1] + input[i + 3][1];
c[0] = input[i][0] - input[i + 1][0];
c[1] = input[i][1] - input[i + 1][1];
d[0] = input[i + 2][0] - input[i + 3][0];
d[1] = input[i + 2][1] - input[i + 3][1];
input[i][0] = a[0] + b[0];
input[i][1] = a[1] + b[1];
input[i + 2][0] = a[0] - b[0];
input[i + 2][1] = a[1] - b[1];
e1[0] = c[0] - d[1];
e1[1] = c[1] + d[0];
e2[0] = c[0] + d[1];
e2[1] = c[1] - d[0];
if (forward) {
input[i + 1][0] = e2[0];
input[i + 1][1] = e2[1];
input[i + 3][0] = e1[0];
input[i + 3][1] = e1[1];
} else {
input[i + 1][0] = e1[0];
input[i + 1][1] = e1[1];
input[i + 3][0] = e2[0];
input[i + 3][1] = e2[1];
}
}
// iterations from bottom to top
for (var i = 4; i < length; i <<= 1) {
var shift = i << 1,
m = length / shift;
for(var j = 0; j < length; j += shift) {
for(var k = 0; k < i; k++) {
var km = k * m,
rootRe = roots[km][0],
rootIm = roots[km][imOffset],
zRe = input[i + j + k][0] * rootRe - input[i + j + k][1] * rootIm,
zIm = input[i + j + k][0] * rootIm + input[i + j + k][1] * rootRe;
input[i + j + k][0] = (input[j + k][0] - zRe) * scale;
input[i + j + k][1] = (input[j + k][1] - zIm) * scale;
input[j + k][0] = (input[j + k][0] + zRe) * scale;
input[j + k][1] = (input[j + k][1] + zIm) * scale;
}
}
}
};
module.exports = FFT;
},{}],6:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
var ICStream = require('./ics');
var MDCT = require('./mdct');
function FilterBank(smallFrames, channels) {
if (smallFrames) {
throw new Error("WHA?? No small frames allowed.");
}
this.length = 1024;
this.shortLength = 128;
this.mid = (this.length - this.shortLength) / 2;
this.trans = this.shortLength / 2;
this.mdctShort = new MDCT(this.shortLength * 2);
this.mdctLong = new MDCT(this.length * 2);
this.overlaps = new Array(channels);
for (var i = 0; i < channels; i++) {
this.overlaps[i] = new Float32Array(this.length);
}
this.buf = new Float32Array(2 * this.length);
}
function generateSineWindow(len) {
var d = new Float32Array(len);
for (var i = 0; i < len; i++) {
d[i] = Math.sin((i + 0.5) * (Math.PI / (2.0 * len)))
}
return d;
}
function generateKBDWindow(alpha, len) {
var PIN = Math.PI / len,
out = new Float32Array(len),
sum = 0,
f = new Float32Array(len),
alpha2 = (alpha * PIN) * (alpha * PIN);
for (var n = 0; n < len; n++) {
var tmp = n * (len - n) * alpha2,
bessel = 1;
for (var j = 50; j > 0; j--) {
bessel = bessel * tmp / (j * j) + 1;
}
sum += bessel;
f[n] = sum;
}
sum++;
for (var n = 0; n < len; n++) {
out[n] = Math.sqrt(f[n] / sum);
}
return out;
}
const SINE_1024 = generateSineWindow(1024),
SINE_128 = generateSineWindow(128),
KBD_1024 = generateKBDWindow(4, 1024),
KBD_128 = generateKBDWindow(6, 128),
LONG_WINDOWS = [SINE_1024, KBD_1024],
SHORT_WINDOWS = [SINE_128, KBD_128];
FilterBank.prototype.process = function(info, input, output, channel) {
var overlap = this.overlaps[channel],
windowShape = info.windowShape[1],
windowShapePrev = info.windowShape[0],
longWindows = LONG_WINDOWS[windowShape],
shortWindows = SHORT_WINDOWS[windowShape],
longWindowsPrev = LONG_WINDOWS[windowShapePrev],
shortWindowsPrev = SHORT_WINDOWS[windowShapePrev],
length = this.length,
shortLen = this.shortLength,
mid = this.mid,
trans = this.trans,
buf = this.buf,
mdctLong = this.mdctLong,
mdctShort = this.mdctShort;
switch (info.windowSequence) {
case ICStream.ONLY_LONG_SEQUENCE:
mdctLong.process(input, 0, buf, 0);
// add second half output of previous frame to windowed output of current frame
for (var i = 0; i < length; i++) {
output[i] = overlap[i] + (buf[i] * longWindowsPrev[i]);
}
// window the second half and save as overlap for next frame
for (var i = 0; i < length; i++) {
overlap[i] = buf[length + i] * longWindows[length - 1 - i];
}
break;
case ICStream.LONG_START_SEQUENCE:
mdctLong.process(input, 0, buf, 0);
// add second half output of previous frame to windowed output of current frame
for (var i = 0; i < length; i++) {
output[i] = overlap[i] + (buf[i] * longWindowsPrev[i]);
}
// window the second half and save as overlap for next frame
for (var i = 0; i < mid; i++) {
overlap[i] = buf[length + i];
}
for (var i = 0; i < shortLen; i++) {
overlap[mid + i] = buf[length + mid + i] * shortWindows[shortLen - i - 1];
}
for (var i = 0; i < mid; i++) {
overlap[mid + shortLen + i] = 0;
}
break;
case ICStream.EIGHT_SHORT_SEQUENCE:
for (var i = 0; i < 8; i++) {
mdctShort.process(input, i * shortLen, buf, 2 * i * shortLen);
}
// add second half output of previous frame to windowed output of current frame
for (var i = 0; i < mid; i++) {
output[i] = overlap[i];
}
for (var i = 0; i < shortLen; i++) {
output[mid + i] = overlap[mid + i] + buf[i] * shortWindowsPrev[i];
output[mid + 1 * shortLen + i] = overlap[mid + shortLen * 1 + i] + (buf[shortLen * 1 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 2 + i] * shortWindows[i]);
output[mid + 2 * shortLen + i] = overlap[mid + shortLen * 2 + i] + (buf[shortLen * 3 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 4 + i] * shortWindows[i]);
output[mid + 3 * shortLen + i] = overlap[mid + shortLen * 3 + i] + (buf[shortLen * 5 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 6 + i] * shortWindows[i]);
if (i < trans)
output[mid + 4 * shortLen + i] = overlap[mid + shortLen * 4 + i] + (buf[shortLen * 7 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 8 + i] * shortWindows[i]);
}
// window the second half and save as overlap for next frame
for (var i = 0; i < shortLen; i++) {
if(i >= trans)
overlap[mid + 4 * shortLen + i - length] = (buf[shortLen * 7 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 8 + i] * shortWindows[i]);
overlap[mid + 5 * shortLen + i - length] = (buf[shortLen * 9 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 10 + i] * shortWindows[i]);
overlap[mid + 6 * shortLen + i - length] = (buf[shortLen * 11 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 12 + i]*shortWindows[i]);
overlap[mid + 7 * shortLen + i - length] = (buf[shortLen * 13 + i] * shortWindows[shortLen - 1 - i]) + (buf[shortLen * 14 + i]*shortWindows[i]);
overlap[mid + 8 * shortLen + i - length] = (buf[shortLen * 15 + i] * shortWindows[shortLen - 1 - i]);
}
for (var i = 0; i < mid; i++) {
overlap[mid + shortLen + i] = 0;
}
break;
case ICStream.LONG_STOP_SEQUENCE:
mdctLong.process(input, 0, buf, 0);
// add second half output of previous frame to windowed output of current frame
// construct first half window using padding with 1's and 0's
for (var i = 0; i < mid; i++) {
output[i] = overlap[i];
}
for (var i = 0; i < shortLen; i++) {
output[mid + i] = overlap[mid + i] + (buf[mid + i] * shortWindowsPrev[i]);
}
for (var i = 0; i < mid; i++) {
output[mid + shortLen + i] = overlap[mid + shortLen + i] + buf[mid + shortLen + i];
}
// window the second half and save as overlap for next frame
for (var i = 0; i < length; i++) {
overlap[i] = buf[length + i] * longWindows[length - 1 - i];
}
break;
}
};
module.exports = FilterBank;
},{"./ics":8,"./mdct":9}],7:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
// [bit length, codeword, values...]
const HCB1 = [
[1, 0, 0, 0, 0, 0],
[5, 16, 1, 0, 0, 0],
[5, 17, -1, 0, 0, 0],
[5, 18, 0, 0, 0, -1],
[5, 19, 0, 1, 0, 0],
[5, 20, 0, 0, 0, 1],
[5, 21, 0, 0, -1, 0],
[5, 22, 0, 0, 1, 0],
[5, 23, 0, -1, 0, 0],
[7, 96, 1, -1, 0, 0],
[7, 97, -1, 1, 0, 0],
[7, 98, 0, 0, -1, 1],
[7, 99, 0, 1, -1, 0],
[7, 100, 0, -1, 1, 0],
[7, 101, 0, 0, 1, -1],
[7, 102, 1, 1, 0, 0],
[7, 103, 0, 0, -1, -1],
[7, 104, -1, -1, 0, 0],
[7, 105, 0, -1, -1, 0],
[7, 106, 1, 0, -1, 0],
[7, 107, 0, 1, 0, -1],
[7, 108, -1, 0, 1, 0],
[7, 109, 0, 0, 1, 1],
[7, 110, 1, 0, 1, 0],
[7, 111, 0, -1, 0, 1],
[7, 112, 0, 1, 1, 0],
[7, 113, 0, 1, 0, 1],
[7, 114, -1, 0, -1, 0],
[7, 115, 1, 0, 0, 1],
[7, 116, -1, 0, 0, -1],
[7, 117, 1, 0, 0, -1],
[7, 118, -1, 0, 0, 1],
[7, 119, 0, -1, 0, -1],
[9, 480, 1, 1, -1, 0],
[9, 481, -1, 1, -1, 0],
[9, 482, 1, -1, 1, 0],
[9, 483, 0, 1, 1, -1],
[9, 484, 0, 1, -1, 1],
[9, 485, 0, -1, 1, 1],
[9, 486, 0, -1, 1, -1],
[9, 487, 1, -1, -1, 0],
[9, 488, 1, 0, -1, 1],
[9, 489, 0, 1, -1, -1],
[9, 490, -1, 1, 1, 0],
[9, 491, -1, 0, 1, -1],
[9, 492, -1, -1, 1, 0],
[9, 493, 0, -1, -1, 1],
[9, 494, 1, -1, 0, 1],
[9, 495, 1, -1, 0, -1],
[9, 496, -1, 1, 0, -1],
[9, 497, -1, -1, -1, 0],
[9, 498, 0, -1, -1, -1],
[9, 499, 0, 1, 1, 1],
[9, 500, 1, 0, 1, -1],
[9, 501, 1, 1, 0, 1],
[9, 502, -1, 1, 0, 1],
[9, 503, 1, 1, 1, 0],
[10, 1008, -1, -1, 0, 1],
[10, 1009, -1, 0, -1, -1],
[10, 1010, 1, 1, 0, -1],
[10, 1011, 1, 0, -1, -1],
[10, 1012, -1, 0, -1, 1],
[10, 1013, -1, -1, 0, -1],
[10, 1014, -1, 0, 1, 1],
[10, 1015, 1, 0, 1, 1],
[11, 2032, 1, -1, 1, -1],
[11, 2033, -1, 1, -1, 1],
[11, 2034, -1, 1, 1, -1],
[11, 2035, 1, -1, -1, 1],
[11, 2036, 1, 1, 1, 1],
[11, 2037, -1, -1, 1, 1],
[11, 2038, 1, 1, -1, -1],
[11, 2039, -1, -1, 1, -1],
[11, 2040, -1, -1, -1, -1],
[11, 2041, 1, 1, -1, 1],
[11, 2042, 1, -1, 1, 1],
[11, 2043, -1, 1, 1, 1],
[11, 2044, -1, 1, -1, -1],
[11, 2045, -1, -1, -1, 1],
[11, 2046, 1, -1, -1, -1],
[11, 2047, 1, 1, 1, -1]
];
const HCB2 = [
[3, 0, 0, 0, 0, 0],
[4, 2, 1, 0, 0, 0],
[5, 6, -1, 0, 0, 0],
[5, 7, 0, 0, 0, 1],
[5, 8, 0, 0, -1, 0],
[5, 9, 0, 0, 0, -1],
[5, 10, 0, -1, 0, 0],
[5, 11, 0, 0, 1, 0],
[5, 12, 0, 1, 0, 0],
[6, 26, 0, -1, 1, 0],
[6, 27, -1, 1, 0, 0],
[6, 28, 0, 1, -1, 0],
[6, 29, 0, 0, 1, -1],
[6, 30, 0, 1, 0, -1],
[6, 31, 0, 0, -1, 1],
[6, 32, -1, 0, 0, -1],
[6, 33, 1, -1, 0, 0],
[6, 34, 1, 0, -1, 0],
[6, 35, -1, -1, 0, 0],
[6, 36, 0, 0, -1, -1],
[6, 37, 1, 0, 1, 0],
[6, 38, 1, 0, 0, 1],
[6, 39, 0, -1, 0, 1],
[6, 40, -1, 0, 1, 0],
[6, 41, 0, 1, 0, 1],
[6, 42, 0, -1, -1, 0],
[6, 43, -1, 0, 0, 1],
[6, 44, 0, -1, 0, -1],
[6, 45, -1, 0, -1, 0],
[6, 46, 1, 1, 0, 0],
[6, 47, 0, 1, 1, 0],
[6, 48, 0, 0, 1, 1],
[6, 49, 1, 0, 0, -1],
[7, 100, 0, 1, -1, 1],
[7, 101, 1, 0, -1, 1],
[7, 102, -1, 1, -1, 0],
[7, 103, 0, -1, 1, -1],
[7, 104, 1, -1, 1, 0],
[7, 105, 1, 1, 0, -1],
[7, 106, 1, 0, 1, 1],
[7, 107, -1, 1, 1, 0],
[7, 108, 0, -1, -1, 1],
[7, 109, 1, 1, 1, 0],
[7, 110, -1, 0, 1, -1],
[7, 111, -1, -1, -1, 0],
[7, 112, -1, 0, -1, 1],
[7, 113, 1, -1, -1, 0],
[7, 114, 1, 1, -1, 0],
[8, 230, 1, -1, 0, 1],
[8, 231, -1, 1, 0, -1],
[8, 232, -1, -1, 1, 0],
[8, 233, -1, 0, 1, 1],
[8, 234, -1, -1, 0, 1],
[8, 235, -1, -1, 0, -1],
[8, 236, 0, -1, -1, -1],
[8, 237, 1, 0, 1, -1],
[8, 238, 1, 0, -1, -1],
[8, 239, 0, 1, -1, -1],
[8, 240, 0, 1, 1, 1],
[8, 241, -1, 1, 0, 1],
[8, 242, -1, 0, -1, -1],
[8, 243, 0, 1, 1, -1],
[8, 244, 1, -1, 0, -1],
[8, 245, 0, -1, 1, 1],
[8, 246, 1, 1, 0, 1],
[8, 247, 1, -1, 1, -1],
[8, 248, -1, 1, -1, 1],
[9, 498, 1, -1, -1, 1],
[9, 499, -1, -1, -1, -1],
[9, 500, -1, 1, 1, -1],
[9, 501, -1, 1, 1, 1],
[9, 502, 1, 1, 1, 1],
[9, 503, -1, -1, 1, -1],
[9, 504, 1, -1, 1, 1],
[9, 505, -1, 1, -1, -1],
[9, 506, -1, -1, 1, 1],
[9, 507, 1, 1, -1, -1],
[9, 508, 1, -1, -1, -1],
[9, 509, -1, -1, -1, 1],
[9, 510, 1, 1, -1, 1],
[9, 511, 1, 1, 1, -1]
];
const HCB3 = [
[1, 0, 0, 0, 0, 0],
[4, 8, 1, 0, 0, 0],
[4, 9, 0, 0, 0, 1],
[4, 10, 0, 1, 0, 0],
[4, 11, 0, 0, 1, 0],
[5, 24, 1, 1, 0, 0],
[5, 25, 0, 0, 1, 1],
[6, 52, 0, 1, 1, 0],
[6, 53, 0, 1, 0, 1],
[6, 54, 1, 0, 1, 0],
[6, 55, 0, 1, 1, 1],
[6, 56, 1, 0, 0, 1],
[6, 57, 1, 1, 1, 0],
[7, 116, 1, 1, 1, 1],
[7, 117, 1, 0, 1, 1],
[7, 118, 1, 1, 0, 1],
[8, 238, 2, 0, 0, 0],
[8, 239, 0, 0, 0, 2],
[8, 240, 0, 0, 1, 2],
[8, 241, 2, 1, 0, 0],
[8, 242, 1, 2, 1, 0],
[9, 486, 0, 0, 2, 1],
[9, 487, 0, 1, 2, 1],
[9, 488, 1, 2, 0, 0],
[9, 489, 0, 1, 1, 2],
[9, 490, 2, 1, 1, 0],
[9, 491, 0, 0, 2, 0],
[9, 492, 0, 2, 1, 0],
[9, 493, 0, 1, 2, 0],
[9, 494, 0, 2, 0, 0],
[9, 495, 0, 1, 0, 2],
[9, 496, 2, 0, 1, 0],
[9, 497, 1, 2, 1, 1],
[9, 498, 0, 2, 1, 1],
[9, 499, 1, 1, 2, 0],
[9, 500, 1, 1, 2, 1],
[10, 1002, 1, 2, 0, 1],
[10, 1003, 1, 0, 2, 0],
[10, 1004, 1, 0, 2, 1],
[10, 1005, 0, 2, 0, 1],
[10, 1006, 2, 1, 1, 1],
[10, 1007, 1, 1, 1, 2],
[10, 1008, 2, 1, 0, 1],
[10, 1009, 1, 0, 1, 2],
[10, 1010, 0, 0, 2, 2],
[10, 1011, 0, 1, 2, 2],
[10, 1012, 2, 2, 1, 0],
[10, 1013, 1, 2, 2, 0],
[10, 1014, 1, 0, 0, 2],
[10, 1015, 2, 0, 0, 1],
[10, 1016, 0, 2, 2, 1],
[11, 2034, 2, 2, 0, 0],
[11, 2035, 1, 2, 2, 1],
[11, 2036, 1, 1, 0, 2],
[11, 2037, 2, 0, 1, 1],
[11, 2038, 1, 1, 2, 2],
[11, 2039, 2, 2, 1, 1],
[11, 2040, 0, 2, 2, 0],
[11, 2041, 0, 2, 1, 2],
[12, 4084, 1, 0, 2, 2],
[12, 4085, 2, 2, 0, 1],
[12, 4086, 2, 1, 2, 0],
[12, 4087, 2, 2, 2, 0],
[12, 4088, 0, 2, 2, 2],
[12, 4089, 2, 2, 2, 1],
[12, 4090, 2, 1, 2, 1],
[12, 4091, 1, 2, 1, 2],
[12, 4092, 1, 2, 2, 2],
[13, 8186, 0, 2, 0, 2],
[13, 8187, 2, 0, 2, 0],
[13, 8188, 1, 2, 0, 2],
[14, 16378, 2, 0, 2, 1],
[14, 16379, 2, 1, 1, 2],
[14, 16380, 2, 1, 0, 2],
[15, 32762, 2, 2, 2, 2],
[15, 32763, 2, 2, 1, 2],
[15, 32764, 2, 1, 2, 2],
[15, 32765, 2, 0, 1, 2],
[15, 32766, 2, 0, 0, 2],
[16, 65534, 2, 2, 0, 2],
[16, 65535, 2, 0, 2, 2]
];
const HCB4 = [
[4, 0, 1, 1, 1, 1],
[4, 1, 0, 1, 1, 1],
[4, 2, 1, 1, 0, 1],
[4, 3, 1, 1, 1, 0],
[4, 4, 1, 0, 1, 1],
[4, 5, 1, 0, 0, 0],
[4, 6, 1, 1, 0, 0],
[4, 7, 0, 0, 0, 0],
[4, 8, 0, 0, 1, 1],
[4, 9, 1, 0, 1, 0],
[5, 20, 1, 0, 0, 1],
[5, 21, 0, 1, 1, 0],
[5, 22, 0, 0, 0, 1],
[5, 23, 0, 1, 0, 1],
[5, 24, 0, 0, 1, 0],
[5, 25, 0, 1, 0, 0],
[7, 104, 2, 1, 1, 1],
[7, 105, 1, 1, 2, 1],
[7, 106, 1, 2, 1, 1],
[7, 107, 1, 1, 1, 2],
[7, 108, 2, 1, 1, 0],
[7, 109, 2, 1, 0, 1],
[7, 110, 1, 2, 1, 0],
[7, 111, 2, 0, 1, 1],
[7, 112, 0, 1, 2, 1],
[8, 226, 0, 1, 1, 2],
[8, 227, 1, 1, 2, 0],
[8, 228, 0, 2, 1, 1],
[8, 229, 1, 0, 1, 2],
[8, 230, 1, 2, 0, 1],
[8, 231, 1, 1, 0, 2],
[8, 232, 1, 0, 2, 1],
[8, 233, 2, 1, 0, 0],
[8, 234, 2, 0, 1, 0],
[8, 235, 1, 2, 0, 0],
[8, 236, 2, 0, 0, 1],
[8, 237, 0, 1, 0, 2],
[8, 238, 0, 2, 1, 0],
[8, 239, 0, 0, 1, 2],
[8, 240, 0, 1, 2, 0],
[8, 241, 0, 2, 0, 1],
[8, 242, 1, 0, 0, 2],
[8, 243, 0, 0, 2, 1],
[8, 244, 1, 0, 2, 0],
[8, 245, 2, 0, 0, 0],
[8, 246, 0, 0, 0, 2],
[9, 494, 0, 2, 0, 0],
[9, 495, 0, 0, 2, 0],
[9, 496, 1, 2, 2, 1],
[9, 497, 2, 2, 1, 1],
[9, 498, 2, 1, 2, 1],
[9, 499, 1, 1, 2, 2],
[9, 500, 1, 2, 1, 2],
[9, 501, 2, 1, 1, 2],
[10, 1004, 1, 2, 2, 0],
[10, 1005, 2, 2, 1, 0],
[10, 1006, 2, 1, 2, 0],
[10, 1007, 0, 2, 2, 1],
[10, 1008, 0, 1, 2, 2],
[10, 1009, 2, 2, 0, 1],
[10, 1010, 0, 2, 1, 2],
[10, 1011, 2, 0, 2, 1],
[10, 1012, 1, 0, 2, 2],
[10, 1013, 2, 2, 2, 1],
[10, 1014, 1, 2, 0, 2],
[10, 1015, 2, 0, 1, 2],
[10, 1016, 2, 1, 0, 2],
[10, 1017, 1, 2, 2, 2],
[11, 2036, 2, 1, 2, 2],
[11, 2037, 2, 2, 1, 2],
[11, 2038, 0, 2, 2, 0],
[11, 2039, 2, 2, 0, 0],
[11, 2040, 0, 0, 2, 2],
[11, 2041, 2, 0, 2, 0],
[11, 2042, 0, 2, 0, 2],
[11, 2043, 2, 0, 0, 2],
[11, 2044, 2, 2, 2, 2],
[11, 2045, 0, 2, 2, 2],
[11, 2046, 2, 2, 2, 0],
[12, 4094, 2, 2, 0, 2],
[12, 4095, 2, 0, 2, 2]
];
const HCB5 = [
[1, 0, 0, 0],
[4, 8, -1, 0],
[4, 9, 1, 0],
[4, 10, 0, 1],
[4, 11, 0, -1],
[5, 24, 1, -1],
[5, 25, -1, 1],
[5, 26, -1, -1],
[5, 27, 1, 1],
[7, 112, -2, 0],
[7, 113, 0, 2],
[7, 114, 2, 0],
[7, 115, 0, -2],
[8, 232, -2, -1],
[8, 233, 2, 1],
[8, 234, -1, -2],
[8, 235, 1, 2],
[8, 236, -2, 1],
[8, 237, 2, -1],
[8, 238, -1, 2],
[8, 239, 1, -2],
[8, 240, -3, 0],
[8, 241, 3, 0],
[8, 242, 0, -3],
[8, 243, 0, 3],
[9, 488, -3, -1],
[9, 489, 1, 3],
[9, 490, 3, 1],
[9, 491, -1, -3],
[9, 492, -3, 1],
[9, 493, 3, -1],
[9, 494, 1, -3],
[9, 495, -1, 3],
[9, 496, -2, 2],
[9, 497, 2, 2],
[9, 498, -2, -2],
[9, 499, 2, -2],
[10, 1000, -3, -2],
[10, 1001, 3, -2],
[10, 1002, -2, 3],
[10, 1003, 2, -3],
[10, 1004, 3, 2],
[10, 1005, 2, 3],
[10, 1006, -3, 2],
[10, 1007, -2, -3],
[10, 1008, 0, -4],
[10, 1009, -4, 0],
[10, 1010, 4, 1],
[10, 1011, 4, 0],
[11, 2024, -4, -1],
[11, 2025, 0, 4],
[11, 2026, 4, -1],
[11, 2027, -1, -4],
[11, 2028, 1, 4],
[11, 2029, -1, 4],
[11, 2030, -4, 1],
[11, 2031, 1, -4],
[11, 2032, 3, -3],
[11, 2033, -3, -3],
[11, 2034, -3, 3],
[11, 2035, -2, 4],
[11, 2036, -4, -2],
[11, 2037, 4, 2],
[11, 2038, 2, -4],
[11, 2039, 2, 4],
[11, 2040, 3, 3],
[11, 2041, -4, 2],
[12, 4084, -2, -4],
[12, 4085, 4, -2],
[12, 4086, 3, -4],
[12, 4087, -4, -3],
[12, 4088, -4, 3],
[12, 4089, 3, 4],
[12, 4090, -3, 4],
[12, 4091, 4, 3],
[12, 4092, 4, -3],
[12, 4093, -3, -4],
[13, 8188, 4, -4],
[13, 8189, -4, 4],
[13, 8190, 4, 4],
[13, 8191, -4, -4]
];
const HCB6 = [
[4, 0, 0, 0],
[4, 1, 1, 0],
[4, 2, 0, -1],
[4, 3, 0, 1],
[4, 4, -1, 0],
[4, 5, 1, 1],
[4, 6, -1, 1],
[4, 7, 1, -1],
[4, 8, -1, -1],
[6, 36, 2, -1],
[6, 37, 2, 1],
[6, 38, -2, 1],
[6, 39, -2, -1],
[6, 40, -2, 0],
[6, 41, -1, 2],
[6, 42, 2, 0],
[6, 43, 1, -2],
[6, 44, 1, 2],
[6, 45, 0, -2],
[6, 46, -1, -2],
[6, 47, 0, 2],
[6, 48, 2, -2],
[6, 49, -2, 2],
[6, 50, -2, -2],
[6, 51, 2, 2],
[7, 104, -3, 1],
[7, 105, 3, 1],
[7, 106, 3, -1],
[7, 107, -1, 3],
[7, 108, -3, -1],
[7, 109, 1, 3],
[7, 110, 1, -3],
[7, 111, -1, -3],
[7, 112, 3, 0],
[7, 113, -3, 0],
[7, 114, 0, -3],
[7, 115, 0, 3],
[7, 116, 3, 2],
[8, 234, -3, -2],
[8, 235, -2, 3],
[8, 236, 2, 3],
[8, 237, 3, -2],
[8, 238, 2, -3],
[8, 239, -2, -3],
[8, 240, -3, 2],
[8, 241, 3, 3],
[9, 484, 3, -3],
[9, 485, -3, -3],
[9, 486, -3, 3],
[9, 487, 1, -4],
[9, 488, -1, -4],
[9, 489, 4, 1],
[9, 490, -4, 1],
[9, 491, -4, -1],
[9, 492, 1, 4],
[9, 493, 4, -1],
[9, 494, -1, 4],
[9, 495, 0, -4],
[9, 496, -4, 2],
[9, 497, -4, -2],
[9, 498, 2, 4],
[9, 499, -2, -4],
[9, 500, -4, 0],
[9, 501, 4, 2],
[9, 502, 4, -2],
[9, 503, -2, 4],
[9, 504, 4, 0],
[9, 505, 2, -4],
[9, 506, 0, 4],
[10, 1014, -3, -4],
[10, 1015, -3, 4],
[10, 1016, 3, -4],
[10, 1017, 4, -3],
[10, 1018, 3, 4],
[10, 1019, 4, 3],
[10, 1020, -4, 3],
[10, 1021, -4, -3],
[11, 2044, 4, 4],
[11, 2045, -4, 4],
[11, 2046, -4, -4],
[11, 2047, 4, -4]
];
const HCB7 = [
[1, 0, 0, 0],
[3, 4, 1, 0],
[3, 5, 0, 1],
[4, 12, 1, 1],
[6, 52, 2, 1],
[6, 53, 1, 2],
[6, 54, 2, 0],
[6, 55, 0, 2],
[7, 112, 3, 1],
[7, 113, 1, 3],
[7, 114, 2, 2],
[7, 115, 3, 0],
[7, 116, 0, 3],
[8, 234, 2, 3],
[8, 235, 3, 2],
[8, 236, 1, 4],
[8, 237, 4, 1],
[8, 238, 1, 5],
[8, 239, 5, 1],
[8, 240, 3, 3],
[8, 241, 2, 4],
[8, 242, 0, 4],
[8, 243, 4, 0],
[9, 488, 4, 2],
[9, 489, 2, 5],
[9, 490, 5, 2],
[9, 491, 0, 5],
[9, 492, 6, 1],
[9, 493, 5, 0],
[9, 494, 1, 6],
[9, 495, 4, 3],
[9, 496, 3, 5],
[9, 497, 3, 4],
[9, 498, 5, 3],
[9, 499, 2, 6],
[9, 500, 6, 2],
[9, 501, 1, 7],
[10, 1004, 3, 6],
[10, 1005, 0, 6],
[10, 1006, 6, 0],
[10, 1007, 4, 4],
[10, 1008, 7, 1],
[10, 1009, 4, 5],
[10, 1010, 7, 2],
[10, 1011, 5, 4],
[10, 1012, 6, 3],
[10, 1013, 2, 7],
[10, 1014, 7, 3],
[10, 1015, 6, 4],
[10, 1016, 5, 5],
[10, 1017, 4, 6],
[10, 1018, 3, 7],
[11, 2038, 7, 0],
[11, 2039, 0, 7],
[11, 2040, 6, 5],
[11, 2041, 5, 6],
[11, 2042, 7, 4],
[11, 2043, 4, 7],
[11, 2044, 5, 7],
[11, 2045, 7, 5],
[12, 4092, 7, 6],
[12, 4093, 6, 6],
[12, 4094, 6, 7],
[12, 4095, 7, 7]
];
const HCB8 = [
[3, 0, 1, 1],
[4, 2, 2, 1],
[4, 3, 1, 0],
[4, 4, 1, 2],
[4, 5, 0, 1],
[4, 6, 2, 2],
[5, 14, 0, 0],
[5, 15, 2, 0],
[5, 16, 0, 2],
[5, 17, 3, 1],
[5, 18, 1, 3],
[5, 19, 3, 2],
[5, 20, 2, 3],
[6, 42, 3, 3],
[6, 43, 4, 1],
[6, 44, 1, 4],
[6, 45, 4, 2],
[6, 46, 2, 4],
[6, 47, 3, 0],
[6, 48, 0, 3],
[6, 49, 4, 3],
[6, 50, 3, 4],
[6, 51, 5, 2],
[7, 104, 5, 1],
[7, 105, 2, 5],
[7, 106, 1, 5],
[7, 107, 5, 3],
[7, 108, 3, 5],
[7, 109, 4, 4],
[7, 110, 5, 4],
[7, 111, 0, 4],
[7, 112, 4, 5],
[7, 113, 4, 0],
[7, 114, 2, 6],
[7, 115, 6, 2],
[7, 116, 6, 1],
[7, 117, 1, 6],
[8, 236, 3, 6],
[8, 237, 6, 3],
[8, 238, 5, 5],
[8, 239, 5, 0],
[8, 240, 6, 4],
[8, 241, 0, 5],
[8, 242, 4, 6],
[8, 243, 7, 1],
[8, 244, 7, 2],
[8, 245, 2, 7],
[8, 246, 6, 5],
[8, 247, 7, 3],
[8, 248, 1, 7],
[8, 249, 5, 6],
[8, 250, 3, 7],
[9, 502, 6, 6],
[9, 503, 7, 4],
[9, 504, 6, 0],
[9, 505, 4, 7],
[9, 506, 0, 6],
[9, 507, 7, 5],
[9, 508, 7, 6],
[9, 509, 6, 7],
[10, 1020, 5, 7],
[10, 1021, 7, 0],
[10, 1022, 0, 7],
[10, 1023, 7, 7]
];
const HCB9 = [
[1, 0, 0, 0],
[3, 4, 1, 0],
[3, 5, 0, 1],
[4, 12, 1, 1],
[6, 52, 2, 1],
[6, 53, 1, 2],
[6, 54, 2, 0],
[6, 55, 0, 2],
[7, 112, 3, 1],
[7, 113, 2, 2],
[7, 114, 1, 3],
[8, 230, 3, 0],
[8, 231, 0, 3],
[8, 232, 2, 3],
[8, 233, 3, 2],
[8, 234, 1, 4],
[8, 235, 4, 1],
[8, 236, 2, 4],
[8, 237, 1, 5],
[9, 476, 4, 2],
[9, 477, 3, 3],
[9, 478, 0, 4],
[9, 479, 4, 0],
[9, 480, 5, 1],
[9, 481, 2, 5],
[9, 482, 1, 6],
[9, 483, 3, 4],
[9, 484, 5, 2],
[9, 485, 6, 1],
[9, 486, 4, 3],
[10, 974, 0, 5],
[10, 975, 2, 6],
[10, 976, 5, 0],
[10, 977, 1, 7],
[10, 978, 3, 5],
[10, 979, 1, 8],
[10, 980, 8, 1],
[10, 981, 4, 4],
[10, 982, 5, 3],
[10, 983, 6, 2],
[10, 984, 7, 1],
[10, 985, 0, 6],
[10, 986, 8, 2],
[10, 987, 2, 8],
[10, 988, 3, 6],
[10, 989, 2, 7],
[10, 990, 4, 5],
[10, 991, 9, 1],
[10, 992, 1, 9],
[10, 993, 7, 2],
[11, 1988, 6, 0],
[11, 1989, 5, 4],
[11, 1990, 6, 3],
[11, 1991, 8, 3],
[11, 1992, 0, 7],
[11, 1993, 9, 2],
[11, 1994, 3, 8],
[11, 1995, 4, 6],
[11, 1996, 3, 7],
[11, 1997, 0, 8],
[11, 1998, 10, 1],
[11, 1999, 6, 4],
[11, 2000, 2, 9],
[11, 2001, 5, 5],
[11, 2002, 8, 0],
[11, 2003, 7, 0],
[11, 2004, 7, 3],
[11, 2005, 10, 2],
[11, 2006, 9, 3],
[11, 2007, 8, 4],
[11, 2008, 1, 10],
[11, 2009, 7, 4],
[11, 2010, 6, 5],
[11, 2011, 5, 6],
[11, 2012, 4, 8],
[11, 2013, 4, 7],
[11, 2014, 3, 9],
[11, 2015, 11, 1],
[11, 2016, 5, 8],
[11, 2017, 9, 0],
[11, 2018, 8, 5],
[12, 4038, 10, 3],
[12, 4039, 2, 10],
[12, 4040, 0, 9],
[12, 4041, 11, 2],
[12, 4042, 9, 4],
[12, 4043, 6, 6],
[12, 4044, 12, 1],
[12, 4045, 4, 9],
[12, 4046, 8, 6],
[12, 4047, 1, 11],
[12, 4048, 9, 5],
[12, 4049, 10, 4],
[12, 4050, 5, 7],
[12, 4051, 7, 5],
[12, 4052, 2, 11],
[12, 4053, 1, 12],
[12, 4054, 12, 2],
[12, 4055, 11, 3],
[12, 4056, 3, 10],
[12, 4057, 5, 9],
[12, 4058, 6, 7],
[12, 4059, 8, 7],
[12, 4060, 11, 4],
[12, 4061, 0, 10],
[12, 4062, 7, 6],
[12, 4063, 12, 3],
[12, 4064, 10, 0],
[12, 4065, 10, 5],
[12, 4066, 4, 10],
[12, 4067, 6, 8],
[12, 4068, 2, 12],
[12, 4069, 9, 6],
[12, 4070, 9, 7],
[12, 4071, 4, 11],
[12, 4072, 11, 0],
[12, 4073, 6, 9],
[12, 4074, 3, 11],
[12, 4075, 5, 10],
[13, 8152, 8, 8],
[13, 8153, 7, 8],
[13, 8154, 12, 5],
[13, 8155, 3, 12],
[13, 8156, 11, 5],
[13, 8157, 7, 7],
[13, 8158, 12, 4],
[13, 8159, 11, 6],
[13, 8160, 10, 6],
[13, 8161, 4, 12],
[13, 8162, 7, 9],
[13, 8163, 5, 11],
[13, 8164, 0, 11],
[13, 8165, 12, 6],
[13, 8166, 6, 10],
[13, 8167, 12, 0],
[13, 8168, 10, 7],
[13, 8169, 5, 12],
[13, 8170, 7, 10],
[13, 8171, 9, 8],
[13, 8172, 0, 12],
[13, 8173, 11, 7],
[13, 8174, 8, 9],
[13, 8175, 9, 9],
[13, 8176, 10, 8],
[13, 8177, 7, 11],
[13, 8178, 12, 7],
[13, 8179, 6, 11],
[13, 8180, 8, 11],
[13, 8181, 11, 8],
[13, 8182, 7, 12],
[13, 8183, 6, 12],
[14, 16368, 8, 10],
[14, 16369, 10, 9],
[14, 16370, 8, 12],
[14, 16371, 9, 10],
[14, 16372, 9, 11],
[14, 16373, 9, 12],
[14, 16374, 10, 11],
[14, 16375, 12, 9],
[14, 16376, 10, 10],
[14, 16377, 11, 9],
[14, 16378, 12, 8],
[14, 16379, 11, 10],
[14, 16380, 12, 10],
[14, 16381, 12, 11],
[15, 32764, 10, 12],
[15, 32765, 11, 11],
[15, 32766, 11, 12],
[15, 32767, 12, 12]
];
const HCB10 = [
[4, 0, 1, 1],
[4, 1, 1, 2],
[4, 2, 2, 1],
[5, 6, 2, 2],
[5, 7, 1, 0],
[5, 8, 0, 1],
[5, 9, 1, 3],
[5, 10, 3, 2],
[5, 11, 3, 1],
[5, 12, 2, 3],
[5, 13, 3, 3],
[6, 28, 2, 0],
[6, 29, 0, 2],
[6, 30, 2, 4],
[6, 31, 4, 2],
[6, 32, 1, 4],
[6, 33, 4, 1],
[6, 34, 0, 0],
[6, 35, 4, 3],
[6, 36, 3, 4],
[6, 37, 3, 0],
[6, 38, 0, 3],
[6, 39, 4, 4],
[6, 40, 2, 5],
[6, 41, 5, 2],
[7, 84, 1, 5],
[7, 85, 5, 1],
[7, 86, 5, 3],
[7, 87, 3, 5],
[7, 88, 5, 4],
[7, 89, 4, 5],
[7, 90, 6, 2],
[7, 91, 2, 6],
[7, 92, 6, 3],
[7, 93, 4, 0],
[7, 94, 6, 1],
[7, 95, 0, 4],
[7, 96, 1, 6],
[7, 97, 3, 6],
[7, 98, 5, 5],
[7, 99, 6, 4],
[7, 100, 4, 6],
[8, 202, 6, 5],
[8, 203, 7, 2],
[8, 204, 3, 7],
[8, 205, 2, 7],
[8, 206, 5, 6],
[8, 207, 8, 2],
[8, 208, 7, 3],
[8, 209, 5, 0],
[8, 210, 7, 1],
[8, 211, 0, 5],
[8, 212, 8, 1],
[8, 213, 1, 7],
[8, 214, 8, 3],
[8, 215, 7, 4],
[8, 216, 4, 7],
[8, 217, 2, 8],
[8, 218, 6, 6],
[8, 219, 7, 5],
[8, 220, 1, 8],
[8, 221, 3, 8],
[8, 222, 8, 4],
[8, 223, 4, 8],
[8, 224, 5, 7],
[8, 225, 8, 5],
[8, 226, 5, 8],
[9, 454, 7, 6],
[9, 455, 6, 7],
[9, 456, 9, 2],
[9, 457, 6, 0],
[9, 458, 6, 8],
[9, 459, 9, 3],
[9, 460, 3, 9],
[9, 461, 9, 1],
[9, 462, 2, 9],
[9, 463, 0, 6],
[9, 464, 8, 6],
[9, 465, 9, 4],
[9, 466, 4, 9],
[9, 467, 10, 2],
[9, 468, 1, 9],
[9, 469, 7, 7],
[9, 470, 8, 7],
[9, 471, 9, 5],
[9, 472, 7, 8],
[9, 473, 10, 3],
[9, 474, 5, 9],
[9, 475, 10, 4],
[9, 476, 2, 10],
[9, 477, 10, 1],
[9, 478, 3, 10],
[9, 479, 9, 6],
[9, 480, 6, 9],
[9, 481, 8, 0],
[9, 482, 4, 10],
[9, 483, 7, 0],
[9, 484, 11, 2],
[10, 970, 7, 9],
[10, 971, 11, 3],
[10, 972, 10, 6],
[10, 973, 1, 10],
[10, 974, 11, 1],
[10, 975, 9, 7],
[10, 976, 0, 7],
[10, 977, 8, 8],
[10, 978, 10, 5],
[10, 979, 3, 11],
[10, 980, 5, 10],
[10, 981, 8, 9],
[10, 982, 11, 5],
[10, 983, 0, 8],
[10, 984, 11, 4],
[10, 985, 2, 11],
[10, 986, 7, 10],
[10, 987, 6, 10],
[10, 988, 10, 7],
[10, 989, 4, 11],
[10, 990, 1, 11],
[10, 991, 12, 2],
[10, 992, 9, 8],
[10, 993, 12, 3],
[10, 994, 11, 6],
[10, 995, 5, 11],
[10, 996, 12, 4],
[10, 997, 11, 7],
[10, 998, 12, 5],
[10, 999, 3, 12],
[10, 1000, 6, 11],
[10, 1001, 9, 0],
[10, 1002, 10, 8],
[10, 1003, 10, 0],
[10, 1004, 12, 1],
[10, 1005, 0, 9],
[10, 1006, 4, 12],
[10, 1007, 9, 9],
[10, 1008, 12, 6],
[10, 1009, 2, 12],
[10, 1010, 8, 10],
[11, 2022, 9, 10],
[11, 2023, 1, 12],
[11, 2024, 11, 8],
[11, 2025, 12, 7],
[11, 2026, 7, 11],
[11, 2027, 5, 12],
[11, 2028, 6, 12],
[11, 2029, 10, 9],
[11, 2030, 8, 11],
[11, 2031, 12, 8],
[11, 2032, 0, 10],
[11, 2033, 7, 12],
[11, 2034, 11, 0],
[11, 2035, 10, 10],
[11, 2036, 11, 9],
[11, 2037, 11, 10],
[11, 2038, 0, 11],
[11, 2039, 11, 11],
[11, 2040, 9, 11],
[11, 2041, 10, 11],
[11, 2042, 12, 0],
[11, 2043, 8, 12],
[12, 4088, 12, 9],
[12, 4089, 10, 12],
[12, 4090, 9, 12],
[12, 4091, 11, 12],
[12, 4092, 12, 11],
[12, 4093, 0, 12],
[12, 4094, 12, 10],
[12, 4095, 12, 12]
];
const HCB11 = [
[4, 0, 0, 0],
[4, 1, 1, 1],
[5, 4, 16, 16],
[5, 5, 1, 0],
[5, 6, 0, 1],
[5, 7, 2, 1],
[5, 8, 1, 2],
[5, 9, 2, 2],
[6, 20, 1, 3],
[6, 21, 3, 1],
[6, 22, 3, 2],
[6, 23, 2, 0],
[6, 24, 2, 3],
[6, 25, 0, 2],
[6, 26, 3, 3],
[7, 54, 4, 1],
[7, 55, 1, 4],
[7, 56, 4, 2],
[7, 57, 2, 4],
[7, 58, 4, 3],
[7, 59, 3, 4],
[7, 60, 3, 0],
[7, 61, 0, 3],
[7, 62, 5, 1],
[7, 63, 5, 2],
[7, 64, 2, 5],
[7, 65, 4, 4],
[7, 66, 1, 5],
[7, 67, 5, 3],
[7, 68, 3, 5],
[7, 69, 5, 4],
[8, 140, 4, 5],
[8, 141, 6, 2],
[8, 142, 2, 6],
[8, 143, 6, 1],
[8, 144, 6, 3],
[8, 145, 3, 6],
[8, 146, 1, 6],
[8, 147, 4, 16],
[8, 148, 3, 16],
[8, 149, 16, 5],
[8, 150, 16, 3],
[8, 151, 16, 4],
[8, 152, 6, 4],
[8, 153, 16, 6],
[8, 154, 4, 0],
[8, 155, 4, 6],
[8, 156, 0, 4],
[8, 157, 2, 16],
[8, 158, 5, 5],
[8, 159, 5, 16],
[8, 160, 16, 7],
[8, 161, 16, 2],
[8, 162, 16, 8],
[8, 163, 2, 7],
[8, 164, 7, 2],
[8, 165, 3, 7],
[8, 166, 6, 5],
[8, 167, 5, 6],
[8, 168, 6, 16],
[8, 169, 16, 10],
[8, 170, 7, 3],
[8, 171, 7, 1],
[8, 172, 16, 9],
[8, 173, 7, 16],
[8, 174, 1, 16],
[8, 175, 1, 7],
[8, 176, 4, 7],
[8, 177, 16, 11],
[8, 178, 7, 4],
[8, 179, 16, 12],
[8, 180, 8, 16],
[8, 181, 16, 1],
[8, 182, 6, 6],
[8, 183, 9, 16],
[8, 184, 2, 8],
[8, 185, 5, 7],
[8, 186, 10, 16],
[8, 187, 16, 13],
[8, 188, 8, 3],
[8, 189, 8, 2],
[8, 190, 3, 8],
[8, 191, 5, 0],
[8, 192, 16, 14],
[8, 193, 11, 16],
[8, 194, 7, 5],
[8, 195, 4, 8],
[8, 196, 6, 7],
[8, 197, 7, 6],
[8, 198, 0, 5],
[9, 398, 8, 4],
[9, 399, 16, 15],
[9, 400, 12, 16],
[9, 401, 1, 8],
[9, 402, 8, 1],
[9, 403, 14, 16],
[9, 404, 5, 8],
[9, 405, 13, 16],
[9, 406, 3, 9],
[9, 407, 8, 5],
[9, 408, 7, 7],
[9, 409, 2, 9],
[9, 410, 8, 6],
[9, 411, 9, 2],
[9, 412, 9, 3],
[9, 413, 15, 16],
[9, 414, 4, 9],
[9, 415, 6, 8],
[9, 416, 6, 0],
[9, 417, 9, 4],
[9, 418, 5, 9],
[9, 419, 8, 7],
[9, 420, 7, 8],
[9, 421, 1, 9],
[9, 422, 10, 3],
[9, 423, 0, 6],
[9, 424, 10, 2],
[9, 425, 9, 1],
[9, 426, 9, 5],
[9, 427, 4, 10],
[9, 428, 2, 10],
[9, 429, 9, 6],
[9, 430, 3, 10],
[9, 431, 6, 9],
[9, 432, 10, 4],
[9, 433, 8, 8],
[9, 434, 10, 5],
[9, 435, 9, 7],
[9, 436, 11, 3],
[9, 437, 1, 10],
[9, 438, 7, 0],
[9, 439, 10, 6],
[9, 440, 7, 9],
[9, 441, 3, 11],
[9, 442, 5, 10],
[9, 443, 10, 1],
[9, 444, 4, 11],
[9, 445, 11, 2],
[9, 446, 13, 2],
[9, 447, 6, 10],
[9, 448, 13, 3],
[9, 449, 2, 11],
[9, 450, 16, 0],
[9, 451, 5, 11],
[9, 452, 11, 5],
[10, 906, 11, 4],
[10, 907, 9, 8],
[10, 908, 7, 10],
[10, 909, 8, 9],
[10, 910, 0, 16],
[10, 911, 4, 13],
[10, 912, 0, 7],
[10, 913, 3, 13],
[10, 914, 11, 6],
[10, 915, 13, 1],
[10, 916, 13, 4],
[10, 917, 12, 3],
[10, 918, 2, 13],
[10, 919, 13, 5],
[10, 920, 8, 10],
[10, 921, 6, 11],
[10, 922, 10, 8],
[10, 923, 10, 7],
[10, 924, 14, 2],
[10, 925, 12, 4],
[10, 926, 1, 11],
[10, 927, 4, 12],
[10, 928, 11, 1],
[10, 929, 3, 12],
[10, 930, 1, 13],
[10, 931, 12, 2],
[10, 932, 7, 11],
[10, 933, 3, 14],
[10, 934, 5, 12],
[10, 935, 5, 13],
[10, 936, 14, 4],
[10, 937, 4, 14],
[10, 938, 11, 7],
[10, 939, 14, 3],
[10, 940, 12, 5],
[10, 941, 13, 6],
[10, 942, 12, 6],
[10, 943, 8, 0],
[10, 944, 11, 8],
[10, 945, 2, 12],
[10, 946, 9, 9],
[10, 947, 14, 5],
[10, 948, 6, 13],
[10, 949, 10, 10],
[10, 950, 15, 2],
[10, 951, 8, 11],
[10, 952, 9, 10],
[10, 953, 14, 6],
[10, 954, 10, 9],
[10, 955, 5, 14],
[10, 956, 11, 9],
[10, 957, 14, 1],
[10, 958, 2, 14],
[10, 959, 6, 12],
[10, 960, 1, 12],
[10, 961, 13, 8],
[10, 962, 0, 8],
[10, 963, 13, 7],
[10, 964, 7, 12],
[10, 965, 12, 7],
[10, 966, 7, 13],
[10, 967, 15, 3],
[10, 968, 12, 1],
[10, 969, 6, 14],
[10, 970, 2, 15],
[10, 971, 15, 5],
[10, 972, 15, 4],
[10, 973, 1, 14],
[10, 974, 9, 11],
[10, 975, 4, 15],
[10, 976, 14, 7],
[10, 977, 8, 13],
[10, 978, 13, 9],
[10, 979, 8, 12],
[10, 980, 5, 15],
[10, 981, 3, 15],
[10, 982, 10, 11],
[10, 983, 11, 10],
[10, 984, 12, 8],
[10, 985, 15, 6],
[10, 986, 15, 7],
[10, 987, 8, 14],
[10, 988, 15, 1],
[10, 989, 7, 14],
[10, 990, 9, 0],
[10, 991, 0, 9],
[10, 992, 9, 13],
[10, 993, 9, 12],
[10, 994, 12, 9],
[10, 995, 14, 8],
[10, 996, 10, 13],
[10, 997, 14, 9],
[10, 998, 12, 10],
[10, 999, 6, 15],
[10, 1000, 7, 15],
[11, 2002, 9, 14],
[11, 2003, 15, 8],
[11, 2004, 11, 11],
[11, 2005, 11, 14],
[11, 2006, 1, 15],
[11, 2007, 10, 12],
[11, 2008, 10, 14],
[11, 2009, 13, 11],
[11, 2010, 13, 10],
[11, 2011, 11, 13],
[11, 2012, 11, 12],
[11, 2013, 8, 15],
[11, 2014, 14, 11],
[11, 2015, 13, 12],
[11, 2016, 12, 13],
[11, 2017, 15, 9],
[11, 2018, 14, 10],
[11, 2019, 10, 0],
[11, 2020, 12, 11],
[11, 2021, 9, 15],
[11, 2022, 0, 10],
[11, 2023, 12, 12],
[11, 2024, 11, 0],
[11, 2025, 12, 14],
[11, 2026, 10, 15],
[11, 2027, 13, 13],
[11, 2028, 0, 13],
[11, 2029, 14, 12],
[11, 2030, 15, 10],
[11, 2031, 15, 11],
[11, 2032, 11, 15],
[11, 2033, 14, 13],
[11, 2034, 13, 0],
[11, 2035, 0, 11],
[11, 2036, 13, 14],
[11, 2037, 15, 12],
[11, 2038, 15, 13],
[11, 2039, 12, 15],
[11, 2040, 14, 0],
[11, 2041, 14, 14],
[11, 2042, 13, 15],
[11, 2043, 12, 0],
[11, 2044, 14, 15],
[12, 4090, 0, 14],
[12, 4091, 0, 12],
[12, 4092, 15, 14],
[12, 4093, 15, 0],
[12, 4094, 0, 15],
[12, 4095, 15, 15]
];
const HCB_SF = [
[1, 0, 60],
[3, 4, 59],
[4, 10, 61],
[4, 11, 58],
[4, 12, 62],
[5, 26, 57],
[5, 27, 63],
[6, 56, 56],
[6, 57, 64],
[6, 58, 55],
[6, 59, 65],
[7, 120, 66],
[7, 121, 54],
[7, 122, 67],
[8, 246, 53],
[8, 247, 68],
[8, 248, 52],
[8, 249, 69],
[8, 250, 51],
[9, 502, 70],
[9, 503, 50],
[9, 504, 49],
[9, 505, 71],
[10, 1012, 72],
[10, 1013, 48],
[10, 1014, 73],
[10, 1015, 47],
[10, 1016, 74],
[10, 1017, 46],
[11, 2036, 76],
[11, 2037, 75],
[11, 2038, 77],
[11, 2039, 78],
[11, 2040, 45],
[11, 2041, 43],
[12, 4084, 44],
[12, 4085, 79],
[12, 4086, 42],
[12, 4087, 41],
[12, 4088, 80],
[12, 4089, 40],
[13, 8180, 81],
[13, 8181, 39],
[13, 8182, 82],
[13, 8183, 38],
[13, 8184, 83],
[14, 16370, 37],
[14, 16371, 35],
[14, 16372, 85],
[14, 16373, 33],
[14, 16374, 36],
[14, 16375, 34],
[14, 16376, 84],
[14, 16377, 32],
[15, 32756, 87],
[15, 32757, 89],
[15, 32758, 30],
[15, 32759, 31],
[16, 65520, 86],
[16, 65521, 29],
[16, 65522, 26],
[16, 65523, 27],
[16, 65524, 28],
[16, 65525, 24],
[16, 65526, 88],
[17, 131054, 25],
[17, 131055, 22],
[17, 131056, 23],
[18, 262114, 90],
[18, 262115, 21],
[18, 262116, 19],
[18, 262117, 3],
[18, 262118, 1],
[18, 262119, 2],
[18, 262120, 0],
[19, 524242, 98],
[19, 524243, 99],
[19, 524244, 100],
[19, 524245, 101],
[19, 524246, 102],
[19, 524247, 117],
[19, 524248, 97],
[19, 524249, 91],
[19, 524250, 92],
[19, 524251, 93],
[19, 524252, 94],
[19, 524253, 95],
[19, 524254, 96],
[19, 524255, 104],
[19, 524256, 111],
[19, 524257, 112],
[19, 524258, 113],
[19, 524259, 114],
[19, 524260, 115],
[19, 524261, 116],
[19, 524262, 110],
[19, 524263, 105],
[19, 524264, 106],
[19, 524265, 107],
[19, 524266, 108],
[19, 524267, 109],
[19, 524268, 118],
[19, 524269, 6],
[19, 524270, 8],
[19, 524271, 9],
[19, 524272, 10],
[19, 524273, 5],
[19, 524274, 103],
[19, 524275, 120],
[19, 524276, 119],
[19, 524277, 4],
[19, 524278, 7],
[19, 524279, 15],
[19, 524280, 16],
[19, 524281, 18],
[19, 524282, 20],
[19, 524283, 17],
[19, 524284, 11],
[19, 524285, 12],
[19, 524286, 14],
[19, 524287, 13]
];
const CODEBOOKS = [HCB1, HCB2, HCB3, HCB4, HCB5, HCB6, HCB7, HCB8, HCB9, HCB10, HCB11];
const UNSIGNED = [false, false, true, true, false, false, true, true, true, true, true],
QUAD_LEN = 4,
PAIR_LEN = 2;
var Huffman = {
findOffset: function(stream, table) {
var off = 0,
len = table[off][0],
cw = stream.read(len);
while (cw !== table[off][1]) {
var j = table[++off][0] - len;
len = table[off][0];
cw <<= j;
cw |= stream.read(j);
}
return off;
},
signValues: function(stream, data, off, len) {
for (var i = off; i < off + len; i++) {
if (data[i] && stream.read(1))
data[i] = -data[i];
}
},
getEscape: function(stream, s) {
var i = 4;
while (stream.read(1))
i++;
var j = stream.read(i) | (1 << i);
return s < 0 ? -j : j;
},
decodeScaleFactor: function(stream) {
var offset = this.findOffset(stream, HCB_SF);
return HCB_SF[offset][2];
},
decodeSpectralData: function(stream, cb, data, off) {
var HCB = CODEBOOKS[cb - 1],
offset = this.findOffset(stream, HCB);
data[off] = HCB[offset][2];
data[off + 1] = HCB[offset][3];
if (cb < 5) {
data[off + 2] = HCB[offset][4];
data[off + 3] = HCB[offset][5];
}
// sign and escape
if (cb < 11) {
if (UNSIGNED[cb - 1])
this.signValues(stream, data, off, cb < 5 ? QUAD_LEN : PAIR_LEN);
} else if (cb === 11 || cb > 15) {
this.signValues(stream, data, off, cb < 5 ? QUAD_LEN : PAIR_LEN);
if (Math.abs(data[off]) === 16)
data[off] = this.getEscape(stream, data[off]);
if (Math.abs(data[off + 1]) === 16)
data[off + 1] = this.getEscape(stream, data[off + 1]);
} else {
throw new Error("Huffman: unknown spectral codebook: " + cb);
}
}
};
module.exports = Huffman;
},{}],8:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
var tables = require('./tables');
var Huffman = require('./huffman');
var TNS = require('./tns');
// Individual Channel Stream
function ICStream(config) {
this.info = new ICSInfo();
this.bandTypes = new Int32Array(MAX_SECTIONS);
this.sectEnd = new Int32Array(MAX_SECTIONS);
this.data = new Float32Array(config.frameLength);
this.scaleFactors = new Float32Array(MAX_SECTIONS);
this.randomState = 0x1F2E3D4C;
this.tns = new TNS(config);
this.specBuf = new Int32Array(4);
}
ICStream.ZERO_BT = 0; // Scalefactors and spectral data are all zero.
ICStream.FIRST_PAIR_BT = 5; // This and later band types encode two values (rather than four) with one code word.
ICStream.ESC_BT = 11; // Spectral data are coded with an escape sequence.
ICStream.NOISE_BT = 13; // Spectral data are scaled white noise not coded in the bitstream.
ICStream.INTENSITY_BT2 = 14; // Scalefactor data are intensity stereo positions.
ICStream.INTENSITY_BT = 15; // Scalefactor data are intensity stereo positions.
ICStream.ONLY_LONG_SEQUENCE = 0;
ICStream.LONG_START_SEQUENCE = 1;
ICStream.EIGHT_SHORT_SEQUENCE = 2;
ICStream.LONG_STOP_SEQUENCE = 3;
const MAX_SECTIONS = 120,
MAX_WINDOW_GROUP_COUNT = 8;
const SF_DELTA = 60,
SF_OFFSET = 200;
ICStream.prototype = {
decode: function(stream, config, commonWindow) {
this.globalGain = stream.read(8);
if (!commonWindow)
this.info.decode(stream, config, commonWindow);
this.decodeBandTypes(stream, config);
this.decodeScaleFactors(stream);
if (this.pulsePresent = stream.read(1)) {
if (this.info.windowSequence === ICStream.EIGHT_SHORT_SEQUENCE)
throw new Error("Pulse tool not allowed in eight short sequence.");
this.decodePulseData(stream);
}
if (this.tnsPresent = stream.read(1)) {
this.tns.decode(stream, this.info);
}
if (this.gainPresent = stream.read(1)) {
throw new Error("TODO: decode gain control/SSR");
}
this.decodeSpectralData(stream);
},
decodeBandTypes: function(stream, config) {
var bits = this.info.windowSequence === ICStream.EIGHT_SHORT_SEQUENCE ? 3 : 5,
groupCount = this.info.groupCount,
maxSFB = this.info.maxSFB,
bandTypes = this.bandTypes,
sectEnd = this.sectEnd,
idx = 0,
escape = (1 << bits) - 1;
for (var g = 0; g < groupCount; g++) {
var k = 0;
while (k < maxSFB) {
var end = k,
bandType = stream.read(4);
if (bandType === 12)
throw new Error("Invalid band type: 12");
var incr;
while ((incr = stream.read(bits)) === escape)
end += incr;
end += incr;
if (end > maxSFB)
throw new Error("Too many bands (" + end + " > " + maxSFB + ")");
for (; k < end; k++) {
bandTypes[idx] = bandType;
sectEnd[idx++] = end;
}
}
}
},
decodeScaleFactors: function(stream) {
var groupCount = this.info.groupCount,
maxSFB = this.info.maxSFB,
offset = [this.globalGain, this.globalGain - 90, 0], // spectrum, noise, intensity
idx = 0,
noiseFlag = true,
scaleFactors = this.scaleFactors,
sectEnd = this.sectEnd,
bandTypes = this.bandTypes;
for (var g = 0; g < groupCount; g++) {
for (var i = 0; i < maxSFB;) {
var runEnd = sectEnd[idx];
switch (bandTypes[idx]) {
case ICStream.ZERO_BT:
for (; i < runEnd; i++, idx++) {
scaleFactors[idx] = 0;
}
break;
case ICStream.INTENSITY_BT:
case ICStream.INTENSITY_BT2:
for(; i < runEnd; i++, idx++) {
offset[2] += Huffman.decodeScaleFactor(stream) - SF_DELTA;
var tmp = Math.min(Math.max(offset[2], -155), 100);
scaleFactors[idx] = tables.SCALEFACTOR_TABLE[-tmp + SF_OFFSET];
}
break;
case ICStream.NOISE_BT:
for(; i < runEnd; i++, idx++) {
if (noiseFlag) {
offset[1] += stream.read(9) - 256;
noiseFlag = false;
} else {
offset[1] += Huffman.decodeScaleFactor(stream) - SF_DELTA;
}
var tmp = Math.min(Math.max(offset[1], -100), 155);
scaleFactors[idx] = -tables.SCALEFACTOR_TABLE[tmp + SF_OFFSET];
}
break;
default:
for(; i < runEnd; i++, idx++) {
offset[0] += Huffman.decodeScaleFactor(stream) - SF_DELTA;
if(offset[0] > 255)
throw new Error("Scalefactor out of range: " + offset[0]);
scaleFactors[idx] = tables.SCALEFACTOR_TABLE[offset[0] - 100 + SF_OFFSET];
}
break;
}
}
}
},
decodePulseData: function(stream) {
var pulseCount = stream.read(2) + 1,
pulseSWB = stream.read(6);
if (pulseSWB >= this.info.swbCount)
throw new Error("Pulse SWB out of range: " + pulseSWB);
if (!this.pulseOffset || this.pulseOffset.length !== pulseCount) {
// only reallocate if needed
this.pulseOffset = new Int32Array(pulseCount);
this.pulseAmp = new Int32Array(pulseCount);
}
this.pulseOffset[0] = this.info.swbOffsets[pulseSWB] + stream.read(5);
this.pulseAmp[0] = stream.read(4);
if (this.pulseOffset[0] > 1023)
throw new Error("Pulse offset out of range: " + this.pulseOffset[0]);
for (var i = 1; i < pulseCount; i++) {
this.pulseOffset[i] = stream.read(5) + this.pulseOffset[i - 1];
if (this.pulseOffset[i] > 1023)
throw new Error("Pulse offset out of range: " + this.pulseOffset[i]);
this.pulseAmp[i] = stream.read(4);
}
},
decodeSpectralData: function(stream) {
var data = this.data,
info = this.info,
maxSFB = info.maxSFB,
windowGroups = info.groupCount,
offsets = info.swbOffsets,
bandTypes = this.bandTypes,
scaleFactors = this.scaleFactors,
buf = this.specBuf;
var groupOff = 0, idx = 0;
for (var g = 0; g < windowGroups; g++) {
var groupLen = info.groupLength[g];
for (var sfb = 0; sfb < maxSFB; sfb++, idx++) {
var hcb = bandTypes[idx],
off = groupOff + offsets[sfb],
width = offsets[sfb + 1] - offsets[sfb];
if (hcb === ICStream.ZERO_BT || hcb === ICStream.INTENSITY_BT || hcb === ICStream.INTENSITY_BT2) {
for (var group = 0; group < groupLen; group++, off += 128) {
for (var i = off; i < off + width; i++) {
data[i] = 0;
}
}
} else if (hcb === ICStream.NOISE_BT) {
// fill with random values
for (var group = 0; group < groupLen; group++, off += 128) {
var energy = 0;
for (var k = 0; k < width; k++) {
this.randomState = (this.randomState * (1664525 + 1013904223))|0;
data[off + k] = this.randomState;
energy += data[off + k] * data[off + k];
}
var scale = scaleFactors[idx] / Math.sqrt(energy);
for (var k = 0; k < width; k++) {
data[off + k] *= scale;
}
}
} else {
for (var group = 0; group < groupLen; group++, off += 128) {
var num = (hcb >= ICStream.FIRST_PAIR_BT) ? 2 : 4;
for (var k = 0; k < width; k += num) {
Huffman.decodeSpectralData(stream, hcb, buf, 0);
// inverse quantization & scaling
for (var j = 0; j < num; j++) {
data[off + k + j] = (buf[j] > 0) ? tables.IQ_TABLE[buf[j]] : -tables.IQ_TABLE[-buf[j]];
data[off + k + j] *= scaleFactors[idx];
}
}
}
}
}
groupOff += groupLen << 7;
}
// add pulse data, if present
if (this.pulsePresent) {
throw new Error('TODO: add pulse data');
}
}
}
// Individual Channel Stream Info
function ICSInfo() {
this.windowShape = new Int32Array(2);
this.windowSequence = ICStream.ONLY_LONG_SEQUENCE;
this.groupLength = new Int32Array(MAX_WINDOW_GROUP_COUNT);
this.ltpData1Present = false;
this.ltpData2Present = false;
}
ICSInfo.prototype = {
decode: function(stream, config, commonWindow) {
stream.advance(1); // reserved
this.windowSequence = stream.read(2);
this.windowShape[0] = this.windowShape[1];
this.windowShape[1] = stream.read(1);
this.groupCount = 1;
this.groupLength[0] = 1;
if (this.windowSequence === ICStream.EIGHT_SHORT_SEQUENCE) {
this.maxSFB = stream.read(4);
for (var i = 0; i < 7; i++) {
if (stream.read(1)) {
this.groupLength[this.groupCount - 1]++;
} else {
this.groupCount++;
this.groupLength[this.groupCount - 1] = 1;
}
}
this.windowCount = 8;
this.swbOffsets = tables.SWB_OFFSET_128[config.sampleIndex];
this.swbCount = tables.SWB_SHORT_WINDOW_COUNT[config.sampleIndex];
this.predictorPresent = false;
} else {
this.maxSFB = stream.read(6);
this.windowCount = 1;
this.swbOffsets = tables.SWB_OFFSET_1024[config.sampleIndex];
this.swbCount = tables.SWB_LONG_WINDOW_COUNT[config.sampleIndex];
this.predictorPresent = !!stream.read(1);
if (this.predictorPresent)
this.decodePrediction(stream, config, commonWindow);
}
},
decodePrediction: function(stream, config, commonWindow) {
throw new Error('Prediction not implemented.');
switch (config.profile) {
case AOT_AAC_MAIN:
throw new Error('Prediction not implemented.');
break;
case AOT_AAC_LTP:
throw new Error('LTP prediction not implemented.');
break;
default:
throw new Error('Unsupported profile for prediction ' + config.profile);
}
}
};
module.exports = ICStream;
},{"./huffman":7,"./tables":11,"./tns":12}],9:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
var tables = require('./mdct_tables');
var FFT = require('./fft');
// Modified Discrete Cosine Transform
function MDCT(length) {
this.N = length;
this.N2 = length >>> 1;
this.N4 = length >>> 2;
this.N8 = length >>> 3;
switch (length) {
case 2048:
this.sincos = tables.MDCT_TABLE_2048;
break;
case 256:
this.sincos = tables.MDCT_TABLE_256;
break;
case 1920:
this.sincos = tables.MDCT_TABLE_1920;
break;
case 240:
this.sincos = tables.MDCT_TABLE_240;
break;
default:
throw new Error("unsupported MDCT length: " + length);
}
this.fft = new FFT(this.N4);
this.buf = new Array(this.N4);
for (var i = 0; i < this.N4; i++) {
this.buf[i] = new Float32Array(2);
}
this.tmp = new Float32Array(2);
}
MDCT.prototype.process = function(input, inOffset, output, outOffset) {
// local access
var N2 = this.N2,
N4 = this.N4,
N8 = this.N8,
buf = this.buf,
tmp = this.tmp,
sincos = this.sincos,
fft = this.fft;
// pre-IFFT complex multiplication
for (var k = 0; k < N4; k++) {
buf[k][1] = (input[inOffset + 2 * k] * sincos[k][0]) + (input[inOffset + N2 - 1 - 2 * k] * sincos[k][1]);
buf[k][0] = (input[inOffset + N2 - 1 - 2 * k] * sincos[k][0]) - (input[inOffset + 2 * k] * sincos[k][1]);
}
// complex IFFT, non-scaling
fft.process(buf, false);
// post-IFFT complex multiplication
for (var k = 0; k < N4; k++) {
tmp[0] = buf[k][0];
tmp[1] = buf[k][1];
buf[k][1] = (tmp[1] * sincos[k][0]) + (tmp[0] * sincos[k][1]);
buf[k][0] = (tmp[0] * sincos[k][0]) - (tmp[1] * sincos[k][1]);
}
// reordering
for (var k = 0; k < N8; k += 2) {
output[outOffset + 2 * k] = buf[N8 + k][1];
output[outOffset + 2 + 2 * k] = buf[N8 + 1 + k][1];
output[outOffset + 1 + 2 * k] = -buf[N8 - 1 - k][0];
output[outOffset + 3 + 2 * k] = -buf[N8 - 2 - k][0];
output[outOffset + N4 + 2 * k] = buf[k][0];
output[outOffset + N4 + 2 + 2 * k] = buf[1 + k][0];
output[outOffset + N4 + 1 + 2 * k] = -buf[N4 - 1 - k][1];
output[outOffset + N4 + 3 + 2 * k] = -buf[N4 - 2 - k][1];
output[outOffset + N2 + 2 * k] = buf[N8 + k][0];
output[outOffset + N2 + 2 + 2 * k] = buf[N8 + 1 + k][0];
output[outOffset + N2 + 1 + 2 * k] = -buf[N8 - 1 - k][1];
output[outOffset + N2 + 3 + 2 * k] = -buf[N8 - 2 - k][1];
output[outOffset + N2 + N4 + 2 * k] = -buf[k][1];
output[outOffset + N2 + N4 + 2 + 2 * k] = -buf[1 + k][1];
output[outOffset + N2 + N4 + 1 + 2 * k] = buf[N4 - 1 - k][0];
output[outOffset + N2 + N4 + 3 + 2 * k] = buf[N4 - 2 - k][0];
}
};
module.exports = MDCT;
},{"./fft":5,"./mdct_tables":10}],10:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
exports.MDCT_TABLE_2048 = [
[0.031249997702054, 0.000011984224612],
[0.031249813866531, 0.000107857810004],
[0.031249335895858, 0.000203730380198],
[0.031248563794535, 0.000299601032804],
[0.031247497569829, 0.000395468865451],
[0.031246137231775, 0.000491332975794],
[0.031244482793177, 0.000587192461525],
[0.031242534269608, 0.000683046420376],
[0.031240291679407, 0.000778893950134],
[0.031237755043684, 0.000874734148645],
[0.031234924386313, 0.000970566113826],
[0.031231799733938, 0.001066388943669],
[0.031228381115970, 0.001162201736253],
[0.031224668564585, 0.001258003589751],
[0.031220662114728, 0.001353793602441],
[0.031216361804108, 0.001449570872710],
[0.031211767673203, 0.001545334499065],
[0.031206879765253, 0.001641083580144],
[0.031201698126266, 0.001736817214719],
[0.031196222805014, 0.001832534501709],
[0.031190453853031, 0.001928234540186],
[0.031184391324617, 0.002023916429386],
[0.031178035276836, 0.002119579268713],
[0.031171385769513, 0.002215222157753],
[0.031164442865236, 0.002310844196278],
[0.031157206629353, 0.002406444484258],
[0.031149677129975, 0.002502022121865],
[0.031141854437973, 0.002597576209488],
[0.031133738626977, 0.002693105847734],
[0.031125329773375, 0.002788610137442],
[0.031116627956316, 0.002884088179689],
[0.031107633257703, 0.002979539075801],
[0.031098345762200, 0.003074961927355],
[0.031088765557222, 0.003170355836197],
[0.031078892732942, 0.003265719904442],
[0.031068727382288, 0.003361053234488],
[0.031058269600939, 0.003456354929021],
[0.031047519487329, 0.003551624091024],
[0.031036477142640, 0.003646859823790],
[0.031025142670809, 0.003742061230921],
[0.031013516178519, 0.003837227416347],
[0.031001597775203, 0.003932357484328],
[0.030989387573042, 0.004027450539462],
[0.030976885686963, 0.004122505686697],
[0.030964092234638, 0.004217522031340],
[0.030951007336485, 0.004312498679058],
[0.030937631115663, 0.004407434735897],
[0.030923963698074, 0.004502329308281],
[0.030910005212362, 0.004597181503027],
[0.030895755789908, 0.004691990427350],
[0.030881215564835, 0.004786755188872],
[0.030866384674000, 0.004881474895632],
[0.030851263256996, 0.004976148656090],
[0.030835851456154, 0.005070775579142],
[0.030820149416533, 0.005165354774124],
[0.030804157285929, 0.005259885350819],
[0.030787875214864, 0.005354366419469],
[0.030771303356593, 0.005448797090784],
[0.030754441867095, 0.005543176475946],
[0.030737290905077, 0.005637503686619],
[0.030719850631972, 0.005731777834961],
[0.030702121211932, 0.005825998033626],
[0.030684102811835, 0.005920163395780],
[0.030665795601276, 0.006014273035101],
[0.030647199752570, 0.006108326065793],
[0.030628315440748, 0.006202321602594],
[0.030609142843557, 0.006296258760782],
[0.030589682141455, 0.006390136656185],
[0.030569933517616, 0.006483954405188],
[0.030549897157919, 0.006577711124743],
[0.030529573250956, 0.006671405932375],
[0.030508961988022, 0.006765037946194],
[0.030488063563118, 0.006858606284900],
[0.030466878172949, 0.006952110067791],
[0.030445406016919, 0.007045548414774],
[0.030423647297133, 0.007138920446372],
[0.030401602218392, 0.007232225283733],
[0.030379270988192, 0.007325462048634],
[0.030356653816724, 0.007418629863497],
[0.030333750916869, 0.007511727851390],
[0.030310562504198, 0.007604755136040],
[0.030287088796968, 0.007697710841838],
[0.030263330016124, 0.007790594093851],
[0.030239286385293, 0.007883404017824],
[0.030214958130781, 0.007976139740197],
[0.030190345481576, 0.008068800388104],
[0.030165448669342, 0.008161385089390],
[0.030140267928416, 0.008253892972610],
[0.030114803495809, 0.008346323167047],
[0.030089055611203, 0.008438674802711],
[0.030063024516947, 0.008530947010354],
[0.030036710458054, 0.008623138921475],
[0.030010113682202, 0.008715249668328],
[0.029983234439732, 0.008807278383932],
[0.029956072983640, 0.008899224202078],
[0.029928629569580, 0.008991086257336],
[0.029900904455860, 0.009082863685067],
[0.029872897903441, 0.009174555621425],
[0.029844610175929, 0.009266161203371],
[0.029816041539579, 0.009357679568679],
[0.029787192263292, 0.009449109855944],
[0.029758062618606, 0.009540451204587],
[0.029728652879702, 0.009631702754871],
[0.029698963323395, 0.009722863647900],
[0.029668994229134, 0.009813933025633],
[0.029638745879000, 0.009904910030891],
[0.029608218557702, 0.009995793807363],
[0.029577412552575, 0.010086583499618],
[0.029546328153577, 0.010177278253107],
[0.029514965653285, 0.010267877214177],
[0.029483325346896, 0.010358379530076],
[0.029451407532220, 0.010448784348962],
[0.029419212509679, 0.010539090819911],
[0.029386740582307, 0.010629298092923],
[0.029353992055740, 0.010719405318933],
[0.029320967238220, 0.010809411649818],
[0.029287666440590, 0.010899316238403],
[0.029254089976290, 0.010989118238474],
[0.029220238161353, 0.011078816804778],
[0.029186111314406, 0.011168411093039],
[0.029151709756664, 0.011257900259961],
[0.029117033811927, 0.011347283463239],
[0.029082083806579, 0.011436559861563],
[0.029046860069582, 0.011525728614630],
[0.029011362932476, 0.011614788883150],
[0.028975592729373, 0.011703739828853],
[0.028939549796957, 0.011792580614500],
[0.028903234474475, 0.011881310403886],
[0.028866647103744, 0.011969928361855],
[0.028829788029135, 0.012058433654299],
[0.028792657597583, 0.012146825448172],
[0.028755256158571, 0.012235102911499],
[0.028717584064137, 0.012323265213377],
[0.028679641668864, 0.012411311523990],
[0.028641429329882, 0.012499241014612],
[0.028602947406859, 0.012587052857618],
[0.028564196262001, 0.012674746226488],
[0.028525176260050, 0.012762320295819],
[0.028485887768276, 0.012849774241331],
[0.028446331156478, 0.012937107239875],
[0.028406506796976, 0.013024318469437],
[0.028366415064615, 0.013111407109155],
[0.028326056336751, 0.013198372339315],
[0.028285430993258, 0.013285213341368],
[0.028244539416515, 0.013371929297933],
[0.028203381991411, 0.013458519392807],
[0.028161959105334, 0.013544982810971],
[0.028120271148172, 0.013631318738598],
[0.028078318512309, 0.013717526363062],
[0.028036101592619, 0.013803604872943],
[0.027993620786463, 0.013889553458039],
[0.027950876493687, 0.013975371309367],
[0.027907869116616, 0.014061057619178],
[0.027864599060052, 0.014146611580959],
[0.027821066731270, 0.014232032389445],
[0.027777272540012, 0.014317319240622],
[0.027733216898487, 0.014402471331737],
[0.027688900221361, 0.014487487861307],
[0.027644322925762, 0.014572368029123],
[0.027599485431266, 0.014657111036262],
[0.027554388159903, 0.014741716085090],
[0.027509031536144, 0.014826182379271],
[0.027463415986904, 0.014910509123778],
[0.027417541941533, 0.014994695524894],
[0.027371409831816, 0.015078740790225],
[0.027325020091965, 0.015162644128704],
[0.027278373158618, 0.015246404750603],
[0.027231469470833, 0.015330021867534],
[0.027184309470088, 0.015413494692460],
[0.027136893600268, 0.015496822439704],
[0.027089222307671, 0.015580004324954],
[0.027041296040997, 0.015663039565269],
[0.026993115251345, 0.015745927379091],
[0.026944680392213, 0.015828666986247],
[0.026895991919487, 0.015911257607961],
[0.026847050291442, 0.015993698466859],
[0.026797855968734, 0.016075988786976],
[0.026748409414401, 0.016158127793763],
[0.026698711093851, 0.016240114714099],
[0.026648761474864, 0.016321948776289],
[0.026598561027585, 0.016403629210082],
[0.026548110224519, 0.016485155246669],
[0.026497409540530, 0.016566526118696],
[0.026446459452830, 0.016647741060271],
[0.026395260440982, 0.016728799306966],
[0.026343812986890, 0.016809700095831],
[0.026292117574797, 0.016890442665397],
[0.026240174691280, 0.016971026255683],
[0.026187984825246, 0.017051450108208],
[0.026135548467924, 0.017131713465990],
[0.026082866112867, 0.017211815573560],
[0.026029938255941, 0.017291755676967],
[0.025976765395322, 0.017371533023784],
[0.025923348031494, 0.017451146863116],
[0.025869686667242, 0.017530596445607],
[0.025815781807646, 0.017609881023449],
[0.025761633960080, 0.017688999850383],
[0.025707243634204, 0.017767952181715],
[0.025652611341960, 0.017846737274313],
[0.025597737597568, 0.017925354386623],
[0.025542622917522, 0.018003802778671],
[0.025487267820581, 0.018082081712071],
[0.025431672827768, 0.018160190450031],
[0.025375838462365, 0.018238128257362],
[0.025319765249906, 0.018315894400484],
[0.025263453718173, 0.018393488147432],
[0.025206904397193, 0.018470908767865],
[0.025150117819228, 0.018548155533070],
[0.025093094518776, 0.018625227715971],
[0.025035835032562, 0.018702124591135],
[0.024978339899534, 0.018778845434780],
[0.024920609660858, 0.018855389524780],
[0.024862644859912, 0.018931756140672],
[0.024804446042284, 0.019007944563666],
[0.024746013755764, 0.019083954076646],
[0.024687348550337, 0.019159783964183],
[0.024628450978184, 0.019235433512536],
[0.024569321593670, 0.019310902009663],
[0.024509960953345, 0.019386188745225],
[0.024450369615932, 0.019461293010596],
[0.024390548142329, 0.019536214098866],
[0.024330497095598, 0.019610951304848],
[0.024270217040961, 0.019685503925087],
[0.024209708545799, 0.019759871257867],
[0.024148972179639, 0.019834052603212],
[0.024088008514157, 0.019908047262901],
[0.024026818123164, 0.019981854540467],
[0.023965401582609, 0.020055473741208],
[0.023903759470567, 0.020128904172192],
[0.023841892367236, 0.020202145142264],
[0.023779800854935, 0.020275195962052],
[0.023717485518092, 0.020348055943974],
[0.023654946943242, 0.020420724402244],
[0.023592185719023, 0.020493200652878],
[0.023529202436167, 0.020565484013703],
[0.023465997687496, 0.020637573804361],
[0.023402572067918, 0.020709469346314],
[0.023338926174419, 0.020781169962854],
[0.023275060606058, 0.020852674979108],
[0.023210975963963, 0.020923983722044],
[0.023146672851322, 0.020995095520475],
[0.023082151873380, 0.021066009705072],
[0.023017413637435, 0.021136725608363],
[0.022952458752826, 0.021207242564742],
[0.022887287830934, 0.021277559910478],
[0.022821901485173, 0.021347676983716],
[0.022756300330983, 0.021417593124488],
[0.022690484985827, 0.021487307674717],
[0.022624456069185, 0.021556819978223],
[0.022558214202547, 0.021626129380729],
[0.022491760009405, 0.021695235229869],
[0.022425094115252, 0.021764136875192],
[0.022358217147572, 0.021832833668171],
[0.022291129735838, 0.021901324962204],
[0.022223832511501, 0.021969610112625],
[0.022156326107988, 0.022037688476709],
[0.022088611160696, 0.022105559413676],
[0.022020688306983, 0.022173222284699],
[0.021952558186166, 0.022240676452909],
[0.021884221439510, 0.022307921283403],
[0.021815678710228, 0.022374956143245],
[0.021746930643469, 0.022441780401478],
[0.021677977886316, 0.022508393429127],
[0.021608821087780, 0.022574794599206],
[0.021539460898790, 0.022640983286719],
[0.021469897972190, 0.022706958868676],
[0.021400132962735, 0.022772720724087],
[0.021330166527077, 0.022838268233979],
[0.021259999323769, 0.022903600781391],
[0.021189632013250, 0.022968717751391],
[0.021119065257845, 0.023033618531071],
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[0.000083889473581, 0.031249887400697]
];
exports.MDCT_TABLE_256 = [
[0.088387931675923, 0.000271171628935],
[0.088354655998507, 0.002440238387037],
[0.088268158780110, 0.004607835236780],
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[0.006231782743558, 0.088168389368510],
[0.004066145255116, 0.088294770302461],
[0.001898058472816, 0.088367965768336]
];
exports.MDCT_TABLE_1920 = [
[0.032274858518097, 0.000013202404176],
[0.032274642494505, 0.000118821372483],
[0.032274080835421, 0.000224439068308],
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[0.003570528107494, 0.032076751638847],
[0.003465538251839, 0.032088264385780],
[0.003360511283053, 0.032099433493181],
[0.003255448325892, 0.032110258841438],
[0.003150350505494, 0.032120740314619],
[0.003045218947373, 0.032130877800478],
[0.002940054777404, 0.032140671190449],
[0.002834859121810, 0.032150120379653],
[0.002729633107153, 0.032159225266897],
[0.002624377860318, 0.032167985754674],
[0.002519094508504, 0.032176401749168],
[0.002413784179212, 0.032184473160250],
[0.002308448000231, 0.032192199901481],
[0.002203087099626, 0.032199581890114],
[0.002097702605728, 0.032206619047093],
[0.001992295647121, 0.032213311297057],
[0.001886867352628, 0.032219658568338],
[0.001781418851302, 0.032225660792960],
[0.001675951272410, 0.032231317906644],
[0.001570465745428, 0.032236629848809],
[0.001464963400018, 0.032241596562566],
[0.001359445366028, 0.032246217994727],
[0.001253912773470, 0.032250494095799],
[0.001148366752513, 0.032254424819990],
[0.001042808433471, 0.032258010125204],
[0.000937238946789, 0.032261249973045],
[0.000831659423030, 0.032264144328817],
[0.000726070992868, 0.032266693161525],
[0.000620474787068, 0.032268896443871],
[0.000514871936481, 0.032270754152261],
[0.000409263572030, 0.032272266266801],
[0.000303650824695, 0.032273432771295],
[0.000198034825504, 0.032274253653254],
[0.000092416705518, 0.032274728903884]
];
exports.MDCT_TABLE_240 = [
[0.091286604111815, 0.000298735779793],
[0.091247502481454, 0.002688238127538],
[0.091145864370807, 0.005075898091152],
[0.090981759437558, 0.007460079287760],
[0.090755300151030, 0.009839147718664],
[0.090466641715108, 0.012211472889198],
[0.090115981961863, 0.014575428926191],
[0.089703561215976, 0.016929395692256],
[0.089229662130024, 0.019271759896156],
[0.088694609490769, 0.021600916198470],
[0.088098769996564, 0.023915268311810],
[0.087442552006035, 0.026213230094844],
[0.086726405258214, 0.028493226639351],
[0.085950820564309, 0.030753695349588],
[0.085116329471329, 0.032993087013213],
[0.084223503897785, 0.035209866863042],
[0.083272955741727, 0.037402515628894],
[0.082265336461381, 0.039569530578832],
[0.081201336628670, 0.041709426549053],
[0.080081685455930, 0.043820736961749],
[0.078907150296148, 0.045902014830227],
[0.077678536117054, 0.047951833750597],
[0.076396684949434, 0.049968788879362],
[0.075062475310050, 0.051951497896226],
[0.073676821599542, 0.053898601951466],
[0.072240673475749, 0.055808766597225],
[0.070755015202858, 0.057680682702068],
[0.069220864976840, 0.059513067348201],
[0.067639274227625, 0.061304664710718],
[0.066011326898512, 0.063054246918278],
[0.064338138703282, 0.064760614894630],
[0.062620856361546, 0.066422599180399],
[0.060860656812842, 0.068039060734572],
[0.059058746410016, 0.069608891715145],
[0.057216360092450, 0.071131016238378],
[0.055334760539699, 0.072604391116154],
[0.053415237306106, 0.074028006570930],
[0.051459105937014, 0.075400886927784],
[0.049467707067153, 0.076722091283096],
[0.047442405501835, 0.077990714149396],
[0.045384589281588, 0.079205886075941],
[0.043295668730857, 0.080366774244592],
[0.041177075491445, 0.081472583040586],
[0.039030261541332, 0.082522554597810],
[0.036856698199564, 0.083515969318206],
[0.034657875117883, 0.084452146364948],
[0.032435299259796, 0.085330444129049],
[0.030190493867775, 0.086150260669096],
[0.027924997419306, 0.086911034123781],
[0.025640362572491, 0.087612243096981],
[0.023338155101933, 0.088253407015092],
[0.021019952825636, 0.088834086456390],
[0.018687344523641, 0.089353883452193],
[0.016341928849164, 0.089812441759604],
[0.013985313232951, 0.090209447105664],
[0.011619112781631, 0.090544627402740],
[0.009244949170797, 0.090817752935000],
[0.006864449533597, 0.091028636515846],
[0.004479245345574, 0.091177133616206],
[0.002090971306534, 0.091263142463585]
];
},{}],11:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
/********************************************************************************
* Sample offset into the window indicating the beginning of a scalefactor
* window band
*
* scalefactor window band - term for scalefactor bands within a window,
* given in Table 4.110 to Table 4.128.
*
* scalefactor band - a set of spectral coefficients which are scaled by one
* scalefactor. In case of EIGHT_SHORT_SEQUENCE and grouping a scalefactor band
* may contain several scalefactor window bands of corresponding frequency. For
* all other window_sequences scalefactor bands and scalefactor window bands are
* identical.
*******************************************************************************/
const SWB_OFFSET_1024_96 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
32, 36, 40, 44, 48, 52, 56, 64,
72, 80, 88, 96, 108, 120, 132, 144,
156, 172, 188, 212, 240, 276, 320, 384,
448, 512, 576, 640, 704, 768, 832, 896,
960, 1024
]);
const SWB_OFFSET_128_96 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
]);
const SWB_OFFSET_1024_64 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
32, 36, 40, 44, 48, 52, 56, 64,
72, 80, 88, 100, 112, 124, 140, 156,
172, 192, 216, 240, 268, 304, 344, 384,
424, 464, 504, 544, 584, 624, 664, 704,
744, 784, 824, 864, 904, 944, 984, 1024
]);
const SWB_OFFSET_128_64 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
]);
const SWB_OFFSET_1024_48 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
32, 36, 40, 48, 56, 64, 72, 80,
88, 96, 108, 120, 132, 144, 160, 176,
196, 216, 240, 264, 292, 320, 352, 384,
416, 448, 480, 512, 544, 576, 608, 640,
672, 704, 736, 768, 800, 832, 864, 896,
928, 1024
]);
const SWB_OFFSET_128_48 = new Uint16Array([
0, 4, 8, 12, 16, 20, 28, 36,
44, 56, 68, 80, 96, 112, 128
]);
const SWB_OFFSET_1024_32 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
32, 36, 40, 48, 56, 64, 72, 80,
88, 96, 108, 120, 132, 144, 160, 176,
196, 216, 240, 264, 292, 320, 352, 384,
416, 448, 480, 512, 544, 576, 608, 640,
672, 704, 736, 768, 800, 832, 864, 896,
928, 960, 992, 1024
]);
const SWB_OFFSET_1024_24 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
32, 36, 40, 44, 52, 60, 68, 76,
84, 92, 100, 108, 116, 124, 136, 148,
160, 172, 188, 204, 220, 240, 260, 284,
308, 336, 364, 396, 432, 468, 508, 552,
600, 652, 704, 768, 832, 896, 960, 1024
]);
const SWB_OFFSET_128_24 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
36, 44, 52, 64, 76, 92, 108, 128
]);
const SWB_OFFSET_1024_16 = new Uint16Array([
0, 8, 16, 24, 32, 40, 48, 56,
64, 72, 80, 88, 100, 112, 124, 136,
148, 160, 172, 184, 196, 212, 228, 244,
260, 280, 300, 320, 344, 368, 396, 424,
456, 492, 532, 572, 616, 664, 716, 772,
832, 896, 960, 1024
]);
const SWB_OFFSET_128_16 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
32, 40, 48, 60, 72, 88, 108, 128
]);
const SWB_OFFSET_1024_8 = new Uint16Array([
0, 12, 24, 36, 48, 60, 72, 84,
96, 108, 120, 132, 144, 156, 172, 188,
204, 220, 236, 252, 268, 288, 308, 328,
348, 372, 396, 420, 448, 476, 508, 544,
580, 620, 664, 712, 764, 820, 880, 944,
1024
]);
const SWB_OFFSET_128_8 = new Uint16Array([
0, 4, 8, 12, 16, 20, 24, 28,
36, 44, 52, 60, 72, 88, 108, 128
]);
exports.SWB_OFFSET_1024 = [
SWB_OFFSET_1024_96,
SWB_OFFSET_1024_96,
SWB_OFFSET_1024_64,
SWB_OFFSET_1024_48,
SWB_OFFSET_1024_48,
SWB_OFFSET_1024_32,
SWB_OFFSET_1024_24,
SWB_OFFSET_1024_24,
SWB_OFFSET_1024_16,
SWB_OFFSET_1024_16,
SWB_OFFSET_1024_16,
SWB_OFFSET_1024_8
];
exports.SWB_OFFSET_128 = [
SWB_OFFSET_128_96,
SWB_OFFSET_128_96,
SWB_OFFSET_128_64,
SWB_OFFSET_128_48,
SWB_OFFSET_128_48,
SWB_OFFSET_128_48,
SWB_OFFSET_128_24,
SWB_OFFSET_128_24,
SWB_OFFSET_128_16,
SWB_OFFSET_128_16,
SWB_OFFSET_128_16,
SWB_OFFSET_128_8
];
exports.SWB_SHORT_WINDOW_COUNT = new Uint8Array([
12, 12, 12, 14, 14, 14, 15, 15, 15, 15, 15, 15
]);
exports.SWB_LONG_WINDOW_COUNT = new Uint8Array([
41, 41, 47, 49, 49, 51, 47, 47, 43, 43, 43, 40
]);
/*
* Scalefactor lookup table
*/
exports.SCALEFACTOR_TABLE = (function() {
var table = new Float32Array(428);
for (var i = 0; i < 428; i++) {
table[i] = Math.pow(2, (i - 200) / 4);
}
return table;
})();
/**
* Inverse quantization lookup table
*/
exports.IQ_TABLE = (function() {
var table = new Float32Array(8191),
four_thirds = 4/3;
for (var i = 0; i < 8191; i++) {
table[i] = Math.pow(i, four_thirds);
}
return table;
})();
exports.SAMPLE_RATES = new Int32Array([
96000, 88200, 64000, 48000, 44100, 32000,
24000, 22050, 16000, 12000, 11025, 8000, 7350
]);
},{}],12:[function(require,module,exports){
/*
* AAC.js - Advanced Audio Coding decoder in JavaScript
* Created by Devon Govett
* Copyright (c) 2012, Official.fm Labs
*
* AAC.js is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* AAC.js is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
* If not, see <http://www.gnu.org/licenses/>.
*/
// Temporal Noise Shaping
function TNS(config) {
this.maxBands = TNS_MAX_BANDS_1024[config.sampleIndex]
this.nFilt = new Int32Array(8);
this.length = new Array(8);
this.direction = new Array(8);
this.order = new Array(8);
this.coef = new Array(8);
// Probably could allocate these as needed
for (var w = 0; w < 8; w++) {
this.length[w] = new Int32Array(4);
this.direction[w] = new Array(4);
this.order[w] = new Int32Array(4);
this.coef[w] = new Array(4);
for (var filt = 0; filt < 4; filt++) {
this.coef[w][filt] = new Float32Array(TNS_MAX_ORDER);
}
}
this.lpc = new Float32Array(TNS_MAX_ORDER);
this.tmp = new Float32Array(TNS_MAX_ORDER);
}
const TNS_MAX_ORDER = 20,
SHORT_BITS = [1, 4, 3],
LONG_BITS = [2, 6, 5];
const TNS_COEF_1_3 = [0.00000000, -0.43388373, 0.64278758, 0.34202015],
TNS_COEF_0_3 = [0.00000000, -0.43388373, -0.78183150, -0.97492790,
0.98480773, 0.86602539, 0.64278758, 0.34202015],
TNS_COEF_1_4 = [0.00000000, -0.20791170, -0.40673664, -0.58778524,
0.67369562, 0.52643216, 0.36124167, 0.18374951],
TNS_COEF_0_4 = [0.00000000, -0.20791170, -0.40673664, -0.58778524,
-0.74314481, -0.86602539, -0.95105654, -0.99452192,
0.99573416, 0.96182561, 0.89516330, 0.79801720,
0.67369562, 0.52643216, 0.36124167, 0.18374951],
TNS_TABLES = [TNS_COEF_0_3, TNS_COEF_0_4, TNS_COEF_1_3, TNS_COEF_1_4];
const TNS_MAX_BANDS_1024 = [31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39, 39],
TNS_MAX_BANDS_128 = [9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14];
TNS.prototype.decode = function(stream, info) {
var windowCount = info.windowCount,
bits = info.windowSequence === 2 ? SHORT_BITS : LONG_BITS;
for (var w = 0; w < windowCount; w++) {
if (this.nFilt[w] = stream.read(bits[0])) {
var coefRes = stream.read(1),
nFilt_w = this.nFilt[w],
length_w = this.length[w],
order_w = this.order[w],
direction_w = this.direction[w],
coef_w = this.coef[w];
for (var filt = 0; filt < nFilt_w; filt++) {
length_w[filt] = stream.read(bits[1]);
if ((order_w[filt] = stream.read(bits[2])) > 20)
throw new Error("TNS filter out of range: " + order_w[filt]);
if (order_w[filt]) {
direction_w[filt] = !!stream.read(1);
var coefCompress = stream.read(1),
coefLen = coefRes + 3 - coefCompress,
tmp = 2 * coefCompress + coefRes,
table = TNS_TABLES[tmp],
order_w_filt = order_w[filt],
coef_w_filt = coef_w[filt];
for (var i = 0; i < order_w_filt; i++)
coef_w_filt[i] = table[stream.read(coefLen)];
}
}
}
}
};
TNS.prototype.process = function(ics, data, decode) {
var mmm = Math.min(this.maxBands, ics.maxSFB),
lpc = this.lpc,
tmp = this.tmp,
info = ics.info,
windowCount = info.windowCount;
for (var w = 0; w < windowCount; w++) {
var bottom = info.swbCount,
nFilt_w = this.nFilt[w],
length_w = this.length[w],
order_w = this.order[w],
coef_w = this.coef[w],
direction_w = this.direction[w];
for (var filt = 0; filt < nFilt_w; filt++) {
var top = bottom,
bottom = Math.max(0, tmp - length_w[filt]),
order = order_w[filt];
if (order === 0) continue;
// calculate lpc coefficients
var autoc = coef_w[filt];
for (var i = 0; i < order; i++) {
var r = -autoc[i];
lpc[i] = r;
for (var j = 0, len = (i + 1) >> 1; j < len; j++) {
var f = lpc[j],
b = lpc[i - 1 - j];
lpc[j] = f + r * b;
lpc[i - 1 - j] = b + r * f;
}
}
var start = info.swbOffsets[Math.min(bottom, mmm)],
end = info.swbOffsets[Math.min(top, mmm)],
size,
inc = 1;
if ((size = end - start) <= 0) continue;
if (direction_w[filt]) {
inc = -1;
start = end - 1;
}
start += w * 128;
if (decode) {
// ar filter
for (var m = 0; m < size; m++, start += inc) {
for (var i = 1; i <= Math.min(m, order); i++) {
data[start] -= data[start - i * inc] * lpc[i - 1];
}
}
} else {
// ma filter
for (var m = 0; m < size; m++, start += inc) {
tmp[0] = data[start];
for (var i = 1; i <= Math.min(m, order); i++)
data[start] += tmp[i] * lpc[i - 1];
for (var i = order; i > 0; i--)
tmp[i] = tmp[i - 1];
}
}
}
}
};
module.exports = TNS;
},{}]},{},[4])
//# sourceMappingURL=aac.js.map