mpeglayer2.cpp

来自「This code is based on mpeg_play, availab」· C++ 代码 · 共 767 行 · 第 1/3 页

CPP
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/* MPEG/WAVE Sound library   (C) 1997 by Jung woo-jae */// Mpeglayer2.cc// It's for MPEG Layer 2#ifdef HAVE_CONFIG_H#include "config.h"#endif#if defined(_WIN32) && defined(_MSC_VER)// disable warnings about double to float conversions#pragma warning(disable: 4244 4305)#endif#include "MPEGaudio.h"#define MAXTABLE 2// Tables for layer 2static const int bitalloclengthtable[MAXTABLE][MAXSUBBAND]={{4,4,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3}, {4,4,4,4,4,4,4,4,4,4,4,3,3,3,3,3, 3,3,3,3,3,3,3,2,2,2,2,2,2,2,2,2}};static const REAL group5bits[27*3]={  -2.0/3.0, -2.0/3.0, -2.0/3.0,       0.0, -2.0/3.0, -2.0/3.0,   2.0/3.0, -2.0/3.0, -2.0/3.0,  -2.0/3.0,      0.0, -2.0/3.0,       0.0,      0.0, -2.0/3.0,   2.0/3.0,      0.0, -2.0/3.0,  -2.0/3.0,  2.0/3.0, -2.0/3.0,       0.0,  2.0/3.0, -2.0/3.0,   2.0/3.0,  2.0/3.0, -2.0/3.0,  -2.0/3.0, -2.0/3.0,      0.0,       0.0, -2.0/3.0,      0.0,   2.0/3.0, -2.0/3.0,      0.0,  -2.0/3.0,      0.0,      0.0,       0.0,      0.0,      0.0,   2.0/3.0,      0.0,      0.0,  -2.0/3.0,  2.0/3.0,      0.0,       0.0,  2.0/3.0,      0.0,   2.0/3.0,  2.0/3.0,      0.0,  -2.0/3.0, -2.0/3.0,  2.0/3.0,       0.0, -2.0/3.0,  2.0/3.0,   2.0/3.0, -2.0/3.0,  2.0/3.0,  -2.0/3.0,      0.0,  2.0/3.0,       0.0,      0.0,  2.0/3.0,   2.0/3.0,      0.0,  2.0/3.0,  -2.0/3.0,  2.0/3.0,  2.0/3.0,       0.0,  2.0/3.0,  2.0/3.0,   2.0/3.0,  2.0/3.0,  2.0/3.0};static const REAL group7bits[125*3]={ -0.8,-0.8,-0.8, -0.4,-0.8,-0.8, 0.0,-0.8,-0.8, 0.4,-0.8,-0.8, 0.8,-0.8,-0.8, -0.8,-0.4,-0.8, -0.4,-0.4,-0.8, 0.0,-0.4,-0.8, 0.4,-0.4,-0.8, 0.8,-0.4,-0.8, -0.8, 0.0,-0.8, -0.4, 0.0,-0.8, 0.0, 0.0,-0.8, 0.4, 0.0,-0.8, 0.8, 0.0,-0.8, -0.8, 0.4,-0.8, -0.4, 0.4,-0.8, 0.0, 0.4,-0.8, 0.4, 0.4,-0.8, 0.8, 0.4,-0.8, -0.8, 0.8,-0.8, -0.4, 0.8,-0.8, 0.0, 0.8,-0.8, 0.4, 0.8,-0.8, 0.8, 0.8,-0.8, -0.8,-0.8,-0.4, -0.4,-0.8,-0.4, 0.0,-0.8,-0.4, 0.4,-0.8,-0.4, 0.8,-0.8,-0.4, -0.8,-0.4,-0.4, -0.4,-0.4,-0.4, 0.0,-0.4,-0.4, 0.4,-0.4,-0.4, 0.8,-0.4,-0.4, -0.8, 0.0,-0.4, -0.4, 0.0,-0.4, 0.0, 0.0,-0.4, 0.4, 0.0,-0.4, 0.8, 0.0,-0.4, -0.8, 0.4,-0.4, -0.4, 0.4,-0.4, 0.0, 0.4,-0.4, 0.4, 0.4,-0.4, 0.8, 0.4,-0.4, -0.8, 0.8,-0.4, -0.4, 0.8,-0.4, 0.0, 0.8,-0.4, 0.4, 0.8,-0.4, 0.8, 0.8,-0.4, -0.8,-0.8, 0.0, -0.4,-0.8, 0.0, 0.0,-0.8, 0.0, 0.4,-0.8, 0.0, 0.8,-0.8, 0.0, -0.8,-0.4, 0.0, -0.4,-0.4, 0.0, 0.0,-0.4, 0.0, 0.4,-0.4, 0.0, 0.8,-0.4, 0.0, -0.8, 0.0, 0.0, -0.4, 0.0, 0.0, 0.0, 0.0, 0.0, 0.4, 0.0, 0.0, 0.8, 0.0, 0.0, -0.8, 0.4, 0.0, -0.4, 0.4, 0.0, 0.0, 0.4, 0.0, 0.4, 0.4, 0.0, 0.8, 0.4, 0.0, -0.8, 0.8, 0.0, -0.4, 0.8, 0.0, 0.0, 0.8, 0.0, 0.4, 0.8, 0.0, 0.8, 0.8, 0.0, -0.8,-0.8, 0.4, -0.4,-0.8, 0.4, 0.0,-0.8, 0.4, 0.4,-0.8, 0.4, 0.8,-0.8, 0.4, -0.8,-0.4, 0.4, -0.4,-0.4, 0.4, 0.0,-0.4, 0.4, 0.4,-0.4, 0.4, 0.8,-0.4, 0.4, -0.8, 0.0, 0.4, -0.4, 0.0, 0.4, 0.0, 0.0, 0.4, 0.4, 0.0, 0.4, 0.8, 0.0, 0.4, -0.8, 0.4, 0.4, -0.4, 0.4, 0.4, 0.0, 0.4, 0.4, 0.4, 0.4, 0.4, 0.8, 0.4, 0.4, -0.8, 0.8, 0.4, -0.4, 0.8, 0.4, 0.0, 0.8, 0.4, 0.4, 0.8, 0.4, 0.8, 0.8, 0.4, -0.8,-0.8, 0.8, -0.4,-0.8, 0.8, 0.0,-0.8, 0.8, 0.4,-0.8, 0.8, 0.8,-0.8, 0.8, -0.8,-0.4, 0.8, -0.4,-0.4, 0.8, 0.0,-0.4, 0.8, 0.4,-0.4, 0.8, 0.8,-0.4, 0.8, -0.8, 0.0, 0.8, -0.4, 0.0, 0.8, 0.0, 0.0, 0.8, 0.4, 0.0, 0.8, 0.8, 0.0, 0.8, -0.8, 0.4, 0.8, -0.4, 0.4, 0.8, 0.0, 0.4, 0.8, 0.4, 0.4, 0.8, 0.8, 0.4, 0.8, -0.8, 0.8, 0.8, -0.4, 0.8, 0.8, 0.0, 0.8, 0.8, 0.4, 0.8, 0.8, 0.8, 0.8, 0.8};static const REAL group10bits[729*3]={ -8.0/9.0,-8.0/9.0,-8.0/9.0, -6.0/9.0,-8.0/9.0,-8.0/9.0, -4.0/9.0,-8.0/9.0,-8.0/9.0, -2.0/9.0,-8.0/9.0,-8.0/9.0,      0.0,-8.0/9.0,-8.0/9.0,  2.0/9.0,-8.0/9.0,-8.0/9.0,  4.0/9.0,-8.0/9.0,-8.0/9.0,  6.0/9.0,-8.0/9.0,-8.0/9.0,  8.0/9.0,-8.0/9.0,-8.0/9.0, -8.0/9.0,-6.0/9.0,-8.0/9.0, -6.0/9.0,-6.0/9.0,-8.0/9.0, -4.0/9.0,-6.0/9.0,-8.0/9.0, -2.0/9.0,-6.0/9.0,-8.0/9.0,      0.0,-6.0/9.0,-8.0/9.0,  2.0/9.0,-6.0/9.0,-8.0/9.0,  4.0/9.0,-6.0/9.0,-8.0/9.0,  6.0/9.0,-6.0/9.0,-8.0/9.0,  8.0/9.0,-6.0/9.0,-8.0/9.0, -8.0/9.0,-4.0/9.0,-8.0/9.0, -6.0/9.0,-4.0/9.0,-8.0/9.0, -4.0/9.0,-4.0/9.0,-8.0/9.0, -2.0/9.0,-4.0/9.0,-8.0/9.0,      0.0,-4.0/9.0,-8.0/9.0,  2.0/9.0,-4.0/9.0,-8.0/9.0,  4.0/9.0,-4.0/9.0,-8.0/9.0,  6.0/9.0,-4.0/9.0,-8.0/9.0,  8.0/9.0,-4.0/9.0,-8.0/9.0, -8.0/9.0,-2.0/9.0,-8.0/9.0, -6.0/9.0,-2.0/9.0,-8.0/9.0, -4.0/9.0,-2.0/9.0,-8.0/9.0, -2.0/9.0,-2.0/9.0,-8.0/9.0,      0.0,-2.0/9.0,-8.0/9.0,  2.0/9.0,-2.0/9.0,-8.0/9.0,  4.0/9.0,-2.0/9.0,-8.0/9.0,  6.0/9.0,-2.0/9.0,-8.0/9.0,  8.0/9.0,-2.0/9.0,-8.0/9.0, -8.0/9.0,     0.0,-8.0/9.0, -6.0/9.0,     0.0,-8.0/9.0, -4.0/9.0,     0.0,-8.0/9.0, -2.0/9.0,     0.0,-8.0/9.0,      0.0,     0.0,-8.0/9.0,  2.0/9.0,     0.0,-8.0/9.0,  4.0/9.0,     0.0,-8.0/9.0,  6.0/9.0,     0.0,-8.0/9.0,  8.0/9.0,     0.0,-8.0/9.0, -8.0/9.0, 2.0/9.0,-8.0/9.0, -6.0/9.0, 2.0/9.0,-8.0/9.0, -4.0/9.0, 2.0/9.0,-8.0/9.0, -2.0/9.0, 2.0/9.0,-8.0/9.0,      0.0, 2.0/9.0,-8.0/9.0,  2.0/9.0, 2.0/9.0,-8.0/9.0,  4.0/9.0, 2.0/9.0,-8.0/9.0,  6.0/9.0, 2.0/9.0,-8.0/9.0,  8.0/9.0, 2.0/9.0,-8.0/9.0, -8.0/9.0, 4.0/9.0,-8.0/9.0, -6.0/9.0, 4.0/9.0,-8.0/9.0, -4.0/9.0, 4.0/9.0,-8.0/9.0, -2.0/9.0, 4.0/9.0,-8.0/9.0,      0.0, 4.0/9.0,-8.0/9.0,  2.0/9.0, 4.0/9.0,-8.0/9.0,  4.0/9.0, 4.0/9.0,-8.0/9.0,  6.0/9.0, 4.0/9.0,-8.0/9.0,  8.0/9.0, 4.0/9.0,-8.0/9.0, -8.0/9.0, 6.0/9.0,-8.0/9.0, -6.0/9.0, 6.0/9.0,-8.0/9.0, -4.0/9.0, 6.0/9.0,-8.0/9.0, -2.0/9.0, 6.0/9.0,-8.0/9.0,      0.0, 6.0/9.0,-8.0/9.0,  2.0/9.0, 6.0/9.0,-8.0/9.0,  4.0/9.0, 6.0/9.0,-8.0/9.0,  6.0/9.0, 6.0/9.0,-8.0/9.0,  8.0/9.0, 6.0/9.0,-8.0/9.0, -8.0/9.0, 8.0/9.0,-8.0/9.0, -6.0/9.0, 8.0/9.0,-8.0/9.0, -4.0/9.0, 8.0/9.0,-8.0/9.0, -2.0/9.0, 8.0/9.0,-8.0/9.0,      0.0, 8.0/9.0,-8.0/9.0,  2.0/9.0, 8.0/9.0,-8.0/9.0,  4.0/9.0, 8.0/9.0,-8.0/9.0,  6.0/9.0, 8.0/9.0,-8.0/9.0,  8.0/9.0, 8.0/9.0,-8.0/9.0, -8.0/9.0,-8.0/9.0,-6.0/9.0, -6.0/9.0,-8.0/9.0,-6.0/9.0, -4.0/9.0,-8.0/9.0,-6.0/9.0, -2.0/9.0,-8.0/9.0,-6.0/9.0,      0.0,-8.0/9.0,-6.0/9.0,  2.0/9.0,-8.0/9.0,-6.0/9.0,  4.0/9.0,-8.0/9.0,-6.0/9.0,  6.0/9.0,-8.0/9.0,-6.0/9.0,  8.0/9.0,-8.0/9.0,-6.0/9.0, -8.0/9.0,-6.0/9.0,-6.0/9.0, -6.0/9.0,-6.0/9.0,-6.0/9.0, -4.0/9.0,-6.0/9.0,-6.0/9.0, -2.0/9.0,-6.0/9.0,-6.0/9.0,      0.0,-6.0/9.0,-6.0/9.0,  2.0/9.0,-6.0/9.0,-6.0/9.0,  4.0/9.0,-6.0/9.0,-6.0/9.0,  6.0/9.0,-6.0/9.0,-6.0/9.0,  8.0/9.0,-6.0/9.0,-6.0/9.0, -8.0/9.0,-4.0/9.0,-6.0/9.0, -6.0/9.0,-4.0/9.0,-6.0/9.0, -4.0/9.0,-4.0/9.0,-6.0/9.0, -2.0/9.0,-4.0/9.0,-6.0/9.0,      0.0,-4.0/9.0,-6.0/9.0,  2.0/9.0,-4.0/9.0,-6.0/9.0,  4.0/9.0,-4.0/9.0,-6.0/9.0,  6.0/9.0,-4.0/9.0,-6.0/9.0,  8.0/9.0,-4.0/9.0,-6.0/9.0, -8.0/9.0,-2.0/9.0,-6.0/9.0, -6.0/9.0,-2.0/9.0,-6.0/9.0, -4.0/9.0,-2.0/9.0,-6.0/9.0, -2.0/9.0,-2.0/9.0,-6.0/9.0,      0.0,-2.0/9.0,-6.0/9.0,  2.0/9.0,-2.0/9.0,-6.0/9.0,  4.0/9.0,-2.0/9.0,-6.0/9.0,  6.0/9.0,-2.0/9.0,-6.0/9.0,  8.0/9.0,-2.0/9.0,-6.0/9.0, -8.0/9.0,     0.0,-6.0/9.0, -6.0/9.0,     0.0,-6.0/9.0, -4.0/9.0,     0.0,-6.0/9.0, -2.0/9.0,     0.0,-6.0/9.0,      0.0,     0.0,-6.0/9.0,  2.0/9.0,     0.0,-6.0/9.0,  4.0/9.0,     0.0,-6.0/9.0,  6.0/9.0,     0.0,-6.0/9.0,  8.0/9.0,     0.0,-6.0/9.0, -8.0/9.0, 2.0/9.0,-6.0/9.0, -6.0/9.0, 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mpeglayer2.cpp - 源码说明

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