292 lines
10 KiB
Haxe
292 lines
10 KiB
Haxe
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package kha.audio2.ogg.vorbis;
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import haxe.ds.Vector;
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import haxe.io.Bytes;
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import haxe.io.Input;
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import haxe.PosInfos;
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import kha.audio2.ogg.vorbis.data.IntPoint;
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import kha.audio2.ogg.vorbis.data.ReaderError;
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import kha.audio2.ogg.tools.MathTools;
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/**
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* ...
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* @author shohei909
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*/
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class VorbisTools
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{
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static public inline var EOP = -1;
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static public var integerDivideTable:Vector<Vector<Int>>;
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static inline var M__PI = 3.14159265358979323846264;
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static inline var DIVTAB_NUMER = 32;
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static inline var DIVTAB_DENOM = 64;
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static public var INVERSE_DB_TABLE = [
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1.0649863e-07, 1.1341951e-07, 1.2079015e-07, 1.2863978e-07,
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1.3699951e-07, 1.4590251e-07, 1.5538408e-07, 1.6548181e-07,
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1.7623575e-07, 1.8768855e-07, 1.9988561e-07, 2.1287530e-07,
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2.2670913e-07, 2.4144197e-07, 2.5713223e-07, 2.7384213e-07,
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2.9163793e-07, 3.1059021e-07, 3.3077411e-07, 3.5226968e-07,
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3.7516214e-07, 3.9954229e-07, 4.2550680e-07, 4.5315863e-07,
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4.8260743e-07, 5.1396998e-07, 5.4737065e-07, 5.8294187e-07,
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6.2082472e-07, 6.6116941e-07, 7.0413592e-07, 7.4989464e-07,
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7.9862701e-07, 8.5052630e-07, 9.0579828e-07, 9.6466216e-07,
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1.0273513e-06, 1.0941144e-06, 1.1652161e-06, 1.2409384e-06,
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1.3215816e-06, 1.4074654e-06, 1.4989305e-06, 1.5963394e-06,
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1.7000785e-06, 1.8105592e-06, 1.9282195e-06, 2.0535261e-06,
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2.1869758e-06, 2.3290978e-06, 2.4804557e-06, 2.6416497e-06,
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2.8133190e-06, 2.9961443e-06, 3.1908506e-06, 3.3982101e-06,
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3.6190449e-06, 3.8542308e-06, 4.1047004e-06, 4.3714470e-06,
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4.6555282e-06, 4.9580707e-06, 5.2802740e-06, 5.6234160e-06,
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5.9888572e-06, 6.3780469e-06, 6.7925283e-06, 7.2339451e-06,
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7.7040476e-06, 8.2047000e-06, 8.7378876e-06, 9.3057248e-06,
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9.9104632e-06, 1.0554501e-05, 1.1240392e-05, 1.1970856e-05,
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1.2748789e-05, 1.3577278e-05, 1.4459606e-05, 1.5399272e-05,
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1.6400004e-05, 1.7465768e-05, 1.8600792e-05, 1.9809576e-05,
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2.1096914e-05, 2.2467911e-05, 2.3928002e-05, 2.5482978e-05,
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2.7139006e-05, 2.8902651e-05, 3.0780908e-05, 3.2781225e-05,
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3.4911534e-05, 3.7180282e-05, 3.9596466e-05, 4.2169667e-05,
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4.4910090e-05, 4.7828601e-05, 5.0936773e-05, 5.4246931e-05,
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5.7772202e-05, 6.1526565e-05, 6.5524908e-05, 6.9783085e-05,
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7.4317983e-05, 7.9147585e-05, 8.4291040e-05, 8.9768747e-05,
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9.5602426e-05, 0.00010181521, 0.00010843174, 0.00011547824,
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0.00012298267, 0.00013097477, 0.00013948625, 0.00014855085,
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0.00015820453, 0.00016848555, 0.00017943469, 0.00019109536,
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0.00020351382, 0.00021673929, 0.00023082423, 0.00024582449,
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0.00026179955, 0.00027881276, 0.00029693158, 0.00031622787,
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0.00033677814, 0.00035866388, 0.00038197188, 0.00040679456,
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0.00043323036, 0.00046138411, 0.00049136745, 0.00052329927,
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0.00055730621, 0.00059352311, 0.00063209358, 0.00067317058,
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0.00071691700, 0.00076350630, 0.00081312324, 0.00086596457,
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0.00092223983, 0.00098217216, 0.0010459992, 0.0011139742,
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0.0011863665, 0.0012634633, 0.0013455702, 0.0014330129,
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0.0015261382, 0.0016253153, 0.0017309374, 0.0018434235,
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0.0019632195, 0.0020908006, 0.0022266726, 0.0023713743,
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0.0025254795, 0.0026895994, 0.0028643847, 0.0030505286,
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0.0032487691, 0.0034598925, 0.0036847358, 0.0039241906,
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0.0041792066, 0.0044507950, 0.0047400328, 0.0050480668,
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0.0053761186, 0.0057254891, 0.0060975636, 0.0064938176,
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0.0069158225, 0.0073652516, 0.0078438871, 0.0083536271,
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0.0088964928, 0.009474637, 0.010090352, 0.010746080,
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0.011444421, 0.012188144, 0.012980198, 0.013823725,
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0.014722068, 0.015678791, 0.016697687, 0.017782797,
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0.018938423, 0.020169149, 0.021479854, 0.022875735,
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0.024362330, 0.025945531, 0.027631618, 0.029427276,
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0.031339626, 0.033376252, 0.035545228, 0.037855157,
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0.040315199, 0.042935108, 0.045725273, 0.048696758,
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0.051861348, 0.055231591, 0.058820850, 0.062643361,
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0.066714279, 0.071049749, 0.075666962, 0.080584227,
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0.085821044, 0.091398179, 0.097337747, 0.10366330,
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0.11039993, 0.11757434, 0.12521498, 0.13335215,
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0.14201813, 0.15124727, 0.16107617, 0.17154380,
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0.18269168, 0.19456402, 0.20720788, 0.22067342,
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0.23501402, 0.25028656, 0.26655159, 0.28387361,
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0.30232132, 0.32196786, 0.34289114, 0.36517414,
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0.38890521, 0.41417847, 0.44109412, 0.46975890,
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0.50028648, 0.53279791, 0.56742212, 0.60429640,
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0.64356699, 0.68538959, 0.72993007, 0.77736504,
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0.82788260, 0.88168307, 0.9389798, 1.0
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];
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public static inline function assert(b:Bool, ?p:PosInfos) {
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#if debug
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if (!b) {
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throw new ReaderError(ReaderErrorType.OTHER, "", p);
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}
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#end
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}
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public static inline function neighbors(x:Vector<Int>, n:Int)
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{
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var low = -1;
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var high = 65536;
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var plow = 0;
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var phigh = 0;
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for (i in 0...n) {
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if (x[i] > low && x[i] < x[n]) { plow = i; low = x[i]; }
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if (x[i] < high && x[i] > x[n]) { phigh = i; high = x[i]; }
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}
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return {
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low : plow,
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high : phigh,
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}
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}
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public static inline function floatUnpack(x:UInt):Float
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{
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// from the specification
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var mantissa:Float = x & 0x1fffff;
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var sign:Int = x & 0x80000000;
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var exp:Int = (x & 0x7fe00000) >>> 21;
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var res:Float = (sign != 0) ? -mantissa : mantissa;
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return res * Math.pow(2, exp - 788);
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}
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public static inline function bitReverse(n:UInt):UInt
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{
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n = ((n & 0xAAAAAAAA) >>> 1) | ((n & 0x55555555) << 1);
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n = ((n & 0xCCCCCCCC) >>> 2) | ((n & 0x33333333) << 2);
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n = ((n & 0xF0F0F0F0) >>> 4) | ((n & 0x0F0F0F0F) << 4);
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n = ((n & 0xFF00FF00) >>> 8) | ((n & 0x00FF00FF) << 8);
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return (n >>> 16) | (n << 16);
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}
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public static inline function pointCompare(a:IntPoint, b:IntPoint) {
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return if (a.x < b.x) -1 else if (a.x > b.x) 1 else 0;
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}
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public static function uintAsc(a:UInt, b:UInt) {
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return if (a < b) {
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-1;
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} else if (a == b){
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0;
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} else {
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1;
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}
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}
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public static function lookup1Values(entries:Int, dim:Int)
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{
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var r = Std.int(Math.exp(Math.log(entries) / dim));
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if (Std.int(Math.pow(r + 1, dim)) <= entries) {
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r++;
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}
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assert(Math.pow(r+1, dim) > entries);
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assert(Std.int(Math.pow(r, dim)) <= entries); // (int),floor() as above
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return r;
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}
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public static function computeWindow(n:Int, window:Vector<Float>)
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{
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var n2 = n >> 1;
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for (i in 0...n2) {
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window[i] = Math.sin(0.5 * M__PI * square(Math.sin((i - 0 + 0.5) / n2 * 0.5 * M__PI)));
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}
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}
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public static function square(f:Float) {
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return f * f;
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}
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public static function computeBitReverse(n:Int, rev:Vector<Int>)
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{
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var ld = MathTools.ilog(n) - 1;
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var n8 = n >> 3;
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for (i in 0...n8) {
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rev[i] = (bitReverse(i) >>> (32 - ld + 3)) << 2;
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}
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}
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public static function computeTwiddleFactors(n:Int, af:Vector<Float>, bf:Vector<Float>, cf:Vector<Float>)
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{
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var n4 = n >> 2;
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var n8 = n >> 3;
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var k2 = 0;
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for (k in 0...n4) {
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af[k2] = Math.cos(4*k*M__PI/n);
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af[k2 + 1] = -Math.sin(4*k*M__PI/n);
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bf[k2] = Math.cos((k2+1)*M__PI/n/2) * 0.5;
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bf[k2 + 1] = Math.sin((k2 + 1) * M__PI / n / 2) * 0.5;
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k2 += 2;
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}
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var k2 = 0;
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for (k in 0...n8) {
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cf[k2 ] = Math.cos(2*(k2+1) * M__PI/n);
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cf[k2+1] = -Math.sin(2*(k2+1) * M__PI/n);
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k2 += 2;
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}
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}
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public static function drawLine(output:Vector<Float>, x0:Int, y0:Int, x1:Int, y1:Int, n:Int)
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{
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if (integerDivideTable == null) {
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integerDivideTable = new Vector(DIVTAB_NUMER);
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for (i in 0...DIVTAB_NUMER) {
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integerDivideTable[i] = new Vector(DIVTAB_DENOM);
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for (j in 1...DIVTAB_DENOM) {
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integerDivideTable[i][j] = Std.int(i / j);
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}
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}
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}
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var dy = y1 - y0;
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var adx = x1 - x0;
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var ady = dy < 0 ? -dy : dy;
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var base:Int;
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var x = x0;
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var y = y0;
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var err = 0;
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var sy = if (adx < DIVTAB_DENOM && ady < DIVTAB_NUMER) {
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if (dy < 0) {
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base = -integerDivideTable[ady][adx];
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base - 1;
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} else {
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base = integerDivideTable[ady][adx];
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base + 1;
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}
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} else {
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base = Std.int(dy / adx);
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if (dy < 0) {
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base - 1;
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} else {
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base + 1;
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}
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}
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ady -= (base < 0 ? -base : base) * adx;
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if (x1 > n) {
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x1 = n;
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}
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output[x] *= INVERSE_DB_TABLE[y];
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for (i in (x + 1)...x1) {
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err += ady;
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if (err >= adx) {
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err -= adx;
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y += sy;
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} else {
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y += base;
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}
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output[i] *= INVERSE_DB_TABLE[y];
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}
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}
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public macro static inline function stbProf(i:Int)
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{
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return macro null;// macro trace($v { i }, channelBuffers[0][0], channelBuffers[0][1]);
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}
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public static inline function predictPoint(x:Int, x0:Int, x1:Int, y0:Int, y1:Int):Int
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{
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var dy = y1 - y0;
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var adx = x1 - x0;
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// @OPTIMIZE: force int division to round in the right direction... is this necessary on x86?
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var err = Math.abs(dy) * (x - x0);
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var off = Std.int(err / adx);
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return dy < 0 ? (y0 - off) : (y0 + off);
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}
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public static inline function emptyFloatVector(len:Int) {
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var vec = new Vector<Float>(len);
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#if neko
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for (i in 0...len) {
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vec[i] = 0;
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}
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#end
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return vec;
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}
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static public function copyVector(source:Vector<Float>):Vector<Float> {
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var dest:Vector<Float> = new Vector<Float>(source.length);
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for (i in 0...source.length) {
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dest[i] = source[i];
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}
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return dest;
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}
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}
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