299 lines
12 KiB
Haxe
299 lines
12 KiB
Haxe
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package kha.audio2.ogg.vorbis.data;
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import haxe.ds.Vector;
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import haxe.io.Input;
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import kha.audio2.ogg.vorbis.VorbisDecodeState;
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/**
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* ...
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* @author shohei909
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*/
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class Residue
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{
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public var begin(default, null):UInt; // uint32
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public var end(default, null):UInt; // uint32
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public var partSize(default, null):UInt; // uint32
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public var classifications(default, null):Int; // uint8
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public var classbook(default, null):Int; // uint8
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public var classdata(default, null):Vector<Vector<Int>>; //uint8 **
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public var residueBooks(default, null):Vector<Vector<Int>>; //int16 (*)[8]
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public var type(default, null):Int;
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public function new() {
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}
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public static function read(decodeState:VorbisDecodeState, codebooks:Vector<Codebook>):Residue
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{
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var r = new Residue();
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r.type = decodeState.readBits(16);
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if (r.type > 2) {
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throw new ReaderError(INVALID_SETUP);
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}
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var residueCascade = new Vector<Int>(64);
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r.begin = decodeState.readBits(24);
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r.end = decodeState.readBits(24);
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r.partSize = decodeState.readBits(24)+1;
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var classifications = r.classifications = decodeState.readBits(6)+1;
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r.classbook = decodeState.readBits(8);
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for (j in 0...r.classifications) {
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var highBits = 0;
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var lowBits = decodeState.readBits(3);
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if (decodeState.readBits(1) != 0){
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highBits = decodeState.readBits(5);
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}
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residueCascade[j] = highBits * 8 + lowBits;
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}
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r.residueBooks = new Vector(r.classifications);
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for (j in 0...r.classifications) {
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r.residueBooks[j] = new Vector(8);
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for (k in 0...8) {
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if (residueCascade[j] & (1 << k) != 0) {
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r.residueBooks[j][k] = decodeState.readBits(8);
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if (r.residueBooks[j][k] >= codebooks.length) {
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throw new ReaderError(INVALID_SETUP);
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}
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} else {
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r.residueBooks[j][k] = -1;
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}
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}
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}
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// precompute the classifications[] array to avoid inner-loop mod/divide
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// call it 'classdata' since we already have classifications
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var el = codebooks[r.classbook].entries;
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var classwords = codebooks[r.classbook].dimensions;
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r.classdata = new Vector(el);
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for (j in 0...el) {
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var temp = j;
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var k = classwords;
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var cd = r.classdata[j] = new Vector(classwords);
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while (--k >= 0) {
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cd[k] = temp % classifications;
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temp = Std.int(temp / classifications);
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}
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}
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return r;
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}
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public function decode(decodeState:VorbisDecodeState, header:Header, residueBuffers:Vector<Vector<Float>>, ch:Int, n:Int, doNotDecode:Vector<Bool>, channelBuffers:Vector<Vector<Float>>)
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{
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// STB_VORBIS_DIVIDES_IN_RESIDUE = true
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var codebooks = header.codebooks;
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var classwords = codebooks[classbook].dimensions;
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var nRead = end - begin;
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var partSize = this.partSize;
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var partRead = Std.int(nRead / partSize);
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var classifications = new Vector<Int>(header.channel * partRead + 1); // + 1 is a hack for a possible crash in line 268 with some ogg files
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VorbisTools.stbProf(2);
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for (i in 0...ch) {
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if (!doNotDecode[i]) {
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var buffer = residueBuffers[i];
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for (j in 0...buffer.length) {
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buffer[j] = 0;
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}
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}
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}
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if (type == 2 && ch != 1) {
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for (j in 0...ch) {
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if (!doNotDecode[j]) {
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break;
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} else if (j == ch - 1) {
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return;
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}
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}
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VorbisTools.stbProf(3);
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for (pass in 0...8) {
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var pcount = 0, classSet = 0;
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if (ch == 2) {
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VorbisTools.stbProf(13);
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while (pcount < partRead) {
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var z = begin + pcount * partSize;
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var cInter = (z & 1);
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var pInter = z >> 1;
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if (pass == 0) {
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var c:Codebook = codebooks[classbook];
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var q = decodeState.decode(c);
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if (q == VorbisTools.EOP) {
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return;
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}
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var i = classwords;
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while (--i >= 0) {
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classifications[i + pcount] = q % this.classifications;
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q = Std.int(q / this.classifications);
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}
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}
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VorbisTools.stbProf(5);
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for (i in 0...classwords) {
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if (pcount >= partRead) {
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break;
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}
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var z = begin + pcount*partSize;
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var c = classifications[pcount];
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var b = residueBooks[c][pass];
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if (b >= 0) {
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var book = codebooks[b];
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VorbisTools.stbProf(20); // accounts for X time
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var result = book.decodeDeinterleaveRepeat(decodeState, residueBuffers, ch, cInter, pInter, n, partSize);
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if (result == null) {
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return;
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} else {
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cInter = result.cInter;
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pInter = result.pInter;
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}
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VorbisTools.stbProf(7);
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} else {
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z += partSize;
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cInter = z & 1;
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pInter = z >> 1;
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}
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++pcount;
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}
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VorbisTools.stbProf(8);
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}
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} else if (ch == 1) {
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while (pcount < partRead) {
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var z = begin + pcount*partSize;
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var cInter = 0;
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var pInter = z;
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if (pass == 0) {
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var c:Codebook = codebooks[classbook];
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var q = decodeState.decode(c);
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if (q == VorbisTools.EOP) return;
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var i = classwords;
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while (--i >= 0) {
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classifications[i + pcount] = q % this.classifications;
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q = Std.int(q / this.classifications);
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}
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}
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for (i in 0...classwords) {
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if (pcount >= partRead) {
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break;
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}
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var z = begin + pcount * partSize;
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var b = residueBooks[classifications[pcount]][pass];
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if (b >= 0) {
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var book:Codebook = codebooks[b];
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VorbisTools.stbProf(22);
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var result = book.decodeDeinterleaveRepeat(decodeState, residueBuffers, ch, cInter, pInter, n, partSize);
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if (result == null) {
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return;
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} else {
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cInter = result.cInter;
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pInter = result.pInter;
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}
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VorbisTools.stbProf(3);
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} else {
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z += partSize;
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cInter = 0;
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pInter = z;
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}
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++pcount;
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}
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}
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} else {
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while (pcount < partRead) {
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var z = begin + pcount * partSize;
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var cInter = z % ch;
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var pInter = Std.int(z / ch);
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if (pass == 0) {
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var c:Codebook = codebooks[classbook];
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var q = decodeState.decode(c);
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if (q == VorbisTools.EOP) {
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return;
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}
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var i = classwords;
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while (--i >= 0) {
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classifications[i+pcount] = q % this.classifications;
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q = Std.int(q / this.classifications);
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}
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}
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for (i in 0...classwords) {
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if (pcount >= partRead) {
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break;
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}
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var z = begin + pcount * partSize;
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var b = residueBooks[classifications[pcount]][pass];
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if (b >= 0) {
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var book = codebooks[b];
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VorbisTools.stbProf(22);
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var result = book.decodeDeinterleaveRepeat(decodeState, residueBuffers, ch, cInter, pInter, n, partSize);
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if (result == null) {
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return;
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} else {
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cInter = result.cInter;
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pInter = result.pInter;
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}
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VorbisTools.stbProf(3);
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} else {
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z += partSize;
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cInter = z % ch;
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pInter = Std.int(z / ch);
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}
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++pcount;
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}
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}
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}
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}
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return;
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}
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VorbisTools.stbProf(9);
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for (pass in 0...8) {
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var pcount = 0;
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var classSet = 0;
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while (pcount < partRead) {
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if (pass == 0) {
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for (j in 0...ch) {
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if (!doNotDecode[j]) {
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var c:Codebook = codebooks[classbook];
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var temp = decodeState.decode(c);
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if (temp == VorbisTools.EOP) {
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return;
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}
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var i = classwords;
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while (--i >= 0) {
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classifications[j * partRead + i + pcount] = temp % this.classifications;
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temp = Std.int(temp / this.classifications);
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}
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}
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}
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}
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for (i in 0...classwords) {
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if (pcount >= partRead) {
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break;
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}
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for (j in 0...ch) {
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if (!doNotDecode[j]) {
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var c = classifications[j * partRead + pcount];
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var b = residueBooks[c][pass];
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if (b >= 0) {
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var target = residueBuffers[j];
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var offset = begin + pcount * partSize;
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var n = partSize;
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var book = codebooks[b];
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if (!book.residueDecode(decodeState, target, offset, n, type)) {
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return;
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}
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}
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}
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}
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++pcount;
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}
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}
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}
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}
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}
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