开通博客赚积分
发布资源赚积分
分类

源码开发语言/平台
当前位置：首页 > 源码/资料 > Windows编程 > 多媒体编程 > 查看源码
dct64_i386.cpp
资源名称：Visual C++视频音频开发实用工程案例精选.rar　[点击查看]
上传用户：tuheem
上传日期：2007-05-01
资源大小：21889k
文件大小：9k
源码类别：

多媒体编程

开发平台：

Visual C++

dct64_i386.cpp：源码内容
  1. //DCT算法合成优化
  3. #include "mpg123.h"
  5. static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples)
  6. {
  7.  {
  8.   register real *costab = pnts[0];
  10.   b1[0x00] = samples[0x00] + samples[0x1F];
  11.   b1[0x1F] = (samples[0x00] - samples[0x1F]) * costab[0x0];
  13.   b1[0x01] = samples[0x01] + samples[0x1E];
  14.   b1[0x1E] = (samples[0x01] - samples[0x1E]) * costab[0x1];
  16.   b1[0x02] = samples[0x02] + samples[0x1D];
  17.   b1[0x1D] = (samples[0x02] - samples[0x1D]) * costab[0x2];
  19.   b1[0x03] = samples[0x03] + samples[0x1C];
  20.   b1[0x1C] = (samples[0x03] - samples[0x1C]) * costab[0x3];
  22.   b1[0x04] = samples[0x04] + samples[0x1B];
  23.   b1[0x1B] = (samples[0x04] - samples[0x1B]) * costab[0x4];
  25.   b1[0x05] = samples[0x05] + samples[0x1A];
  26.   b1[0x1A] = (samples[0x05] - samples[0x1A]) * costab[0x5];
  28.   b1[0x06] = samples[0x06] + samples[0x19];
  29.   b1[0x19] = (samples[0x06] - samples[0x19]) * costab[0x6];
  31.   b1[0x07] = samples[0x07] + samples[0x18];
  32.   b1[0x18] = (samples[0x07] - samples[0x18]) * costab[0x7];
  34.   b1[0x08] = samples[0x08] + samples[0x17];
  35.   b1[0x17] = (samples[0x08] - samples[0x17]) * costab[0x8];
  37.   b1[0x09] = samples[0x09] + samples[0x16];
  38.   b1[0x16] = (samples[0x09] - samples[0x16]) * costab[0x9];
  40.   b1[0x0A] = samples[0x0A] + samples[0x15];
  41.   b1[0x15] = (samples[0x0A] - samples[0x15]) * costab[0xA];
  43.   b1[0x0B] = samples[0x0B] + samples[0x14];
  44.   b1[0x14] = (samples[0x0B] - samples[0x14]) * costab[0xB];
  46.   b1[0x0C] = samples[0x0C] + samples[0x13];
  47.   b1[0x13] = (samples[0x0C] - samples[0x13]) * costab[0xC];
  49.   b1[0x0D] = samples[0x0D] + samples[0x12];
  50.   b1[0x12] = (samples[0x0D] - samples[0x12]) * costab[0xD];
  52.   b1[0x0E] = samples[0x0E] + samples[0x11];
  53.   b1[0x11] = (samples[0x0E] - samples[0x11]) * costab[0xE];
  55.   b1[0x0F] = samples[0x0F] + samples[0x10];
  56.   b1[0x10] = (samples[0x0F] - samples[0x10]) * costab[0xF];
  57.  }
  60.  {
  61.   register real *costab = pnts[1];
  63.   b2[0x00] = b1[0x00] + b1[0x0F]; 
  64.   b2[0x0F] = (b1[0x00] - b1[0x0F]) * costab[0];
  65.   b2[0x01] = b1[0x01] + b1[0x0E]; 
  66.   b2[0x0E] = (b1[0x01] - b1[0x0E]) * costab[1];
  67.   b2[0x02] = b1[0x02] + b1[0x0D]; 
  68.   b2[0x0D] = (b1[0x02] - b1[0x0D]) * costab[2];
  69.   b2[0x03] = b1[0x03] + b1[0x0C]; 
  70.   b2[0x0C] = (b1[0x03] - b1[0x0C]) * costab[3];
  71.   b2[0x04] = b1[0x04] + b1[0x0B]; 
  72.   b2[0x0B] = (b1[0x04] - b1[0x0B]) * costab[4];
  73.   b2[0x05] = b1[0x05] + b1[0x0A]; 
  74.   b2[0x0A] = (b1[0x05] - b1[0x0A]) * costab[5];
  75.   b2[0x06] = b1[0x06] + b1[0x09]; 
  76.   b2[0x09] = (b1[0x06] - b1[0x09]) * costab[6];
  77.   b2[0x07] = b1[0x07] + b1[0x08]; 
  78.   b2[0x08] = (b1[0x07] - b1[0x08]) * costab[7];
  80.   b2[0x10] = b1[0x10] + b1[0x1F];
  81.   b2[0x1F] = (b1[0x1F] - b1[0x10]) * costab[0];
  82.   b2[0x11] = b1[0x11] + b1[0x1E];
  83.   b2[0x1E] = (b1[0x1E] - b1[0x11]) * costab[1];
  84.   b2[0x12] = b1[0x12] + b1[0x1D];
  85.   b2[0x1D] = (b1[0x1D] - b1[0x12]) * costab[2];
  86.   b2[0x13] = b1[0x13] + b1[0x1C];
  87.   b2[0x1C] = (b1[0x1C] - b1[0x13]) * costab[3];
  88.   b2[0x14] = b1[0x14] + b1[0x1B];
  89.   b2[0x1B] = (b1[0x1B] - b1[0x14]) * costab[4];
  90.   b2[0x15] = b1[0x15] + b1[0x1A];
  91.   b2[0x1A] = (b1[0x1A] - b1[0x15]) * costab[5];
  92.   b2[0x16] = b1[0x16] + b1[0x19];
  93.   b2[0x19] = (b1[0x19] - b1[0x16]) * costab[6];
  94.   b2[0x17] = b1[0x17] + b1[0x18];
  95.   b2[0x18] = (b1[0x18] - b1[0x17]) * costab[7];
  96.  }
  98.  {
  99.   register real *costab = pnts[2];
  101.   b1[0x00] = b2[0x00] + b2[0x07];
  102.   b1[0x07] = (b2[0x00] - b2[0x07]) * costab[0];
  103.   b1[0x01] = b2[0x01] + b2[0x06];
  104.   b1[0x06] = (b2[0x01] - b2[0x06]) * costab[1];
  105.   b1[0x02] = b2[0x02] + b2[0x05];
  106.   b1[0x05] = (b2[0x02] - b2[0x05]) * costab[2];
  107.   b1[0x03] = b2[0x03] + b2[0x04];
  108.   b1[0x04] = (b2[0x03] - b2[0x04]) * costab[3];
  110.   b1[0x08] = b2[0x08] + b2[0x0F];
  111.   b1[0x0F] = (b2[0x0F] - b2[0x08]) * costab[0];
  112.   b1[0x09] = b2[0x09] + b2[0x0E];
  113.   b1[0x0E] = (b2[0x0E] - b2[0x09]) * costab[1];
  114.   b1[0x0A] = b2[0x0A] + b2[0x0D];
  115.   b1[0x0D] = (b2[0x0D] - b2[0x0A]) * costab[2];
  116.   b1[0x0B] = b2[0x0B] + b2[0x0C];
  117.   b1[0x0C] = (b2[0x0C] - b2[0x0B]) * costab[3];
  119.   b1[0x10] = b2[0x10] + b2[0x17];
  120.   b1[0x17] = (b2[0x10] - b2[0x17]) * costab[0];
  121.   b1[0x11] = b2[0x11] + b2[0x16];
  122.   b1[0x16] = (b2[0x11] - b2[0x16]) * costab[1];
  123.   b1[0x12] = b2[0x12] + b2[0x15];
  124.   b1[0x15] = (b2[0x12] - b2[0x15]) * costab[2];
  125.   b1[0x13] = b2[0x13] + b2[0x14];
  126.   b1[0x14] = (b2[0x13] - b2[0x14]) * costab[3];
  128.   b1[0x18] = b2[0x18] + b2[0x1F];
  129.   b1[0x1F] = (b2[0x1F] - b2[0x18]) * costab[0];
  130.   b1[0x19] = b2[0x19] + b2[0x1E];
  131.   b1[0x1E] = (b2[0x1E] - b2[0x19]) * costab[1];
  132.   b1[0x1A] = b2[0x1A] + b2[0x1D];
  133.   b1[0x1D] = (b2[0x1D] - b2[0x1A]) * costab[2];
  134.   b1[0x1B] = b2[0x1B] + b2[0x1C];
  135.   b1[0x1C] = (b2[0x1C] - b2[0x1B]) * costab[3];
  136.  }
  138.  {
  139.   register real const cos0 = pnts[3][0];
  140.   register real const cos1 = pnts[3][1];
  142.   b2[0x00] = b1[0x00] + b1[0x03];
  143.   b2[0x03] = (b1[0x00] - b1[0x03]) * cos0;
  144.   b2[0x01] = b1[0x01] + b1[0x02];
  145.   b2[0x02] = (b1[0x01] - b1[0x02]) * cos1;
  147.   b2[0x04] = b1[0x04] + b1[0x07];
  148.   b2[0x07] = (b1[0x07] - b1[0x04]) * cos0;
  149.   b2[0x05] = b1[0x05] + b1[0x06];
  150.   b2[0x06] = (b1[0x06] - b1[0x05]) * cos1;
  152.   b2[0x08] = b1[0x08] + b1[0x0B];
  153.   b2[0x0B] = (b1[0x08] - b1[0x0B]) * cos0;
  154.   b2[0x09] = b1[0x09] + b1[0x0A];
  155.   b2[0x0A] = (b1[0x09] - b1[0x0A]) * cos1;
  156.   
  157.   b2[0x0C] = b1[0x0C] + b1[0x0F];
  158.   b2[0x0F] = (b1[0x0F] - b1[0x0C]) * cos0;
  159.   b2[0x0D] = b1[0x0D] + b1[0x0E];
  160.   b2[0x0E] = (b1[0x0E] - b1[0x0D]) * cos1;
  162.   b2[0x10] = b1[0x10] + b1[0x13];
  163.   b2[0x13] = (b1[0x10] - b1[0x13]) * cos0;
  164.   b2[0x11] = b1[0x11] + b1[0x12];
  165.   b2[0x12] = (b1[0x11] - b1[0x12]) * cos1;
  167.   b2[0x14] = b1[0x14] + b1[0x17];
  168.   b2[0x17] = (b1[0x17] - b1[0x14]) * cos0;
  169.   b2[0x15] = b1[0x15] + b1[0x16];
  170.   b2[0x16] = (b1[0x16] - b1[0x15]) * cos1;
  172.   b2[0x18] = b1[0x18] + b1[0x1B];
  173.   b2[0x1B] = (b1[0x18] - b1[0x1B]) * cos0;
  174.   b2[0x19] = b1[0x19] + b1[0x1A];
  175.   b2[0x1A] = (b1[0x19] - b1[0x1A]) * cos1;
  177.   b2[0x1C] = b1[0x1C] + b1[0x1F];
  178.   b2[0x1F] = (b1[0x1F] - b1[0x1C]) * cos0;
  179.   b2[0x1D] = b1[0x1D] + b1[0x1E];
  180.   b2[0x1E] = (b1[0x1E] - b1[0x1D]) * cos1;
  181.  }
  183.  {
  184.   register real const cos0 = pnts[4][0];
  186.   b1[0x00] = b2[0x00] + b2[0x01];
  187.   b1[0x01] = (b2[0x00] - b2[0x01]) * cos0;
  188.   b1[0x02] = b2[0x02] + b2[0x03];
  189.   b1[0x03] = (b2[0x03] - b2[0x02]) * cos0;
  190.   b1[0x02] += b1[0x03];
  192.   b1[0x04] = b2[0x04] + b2[0x05];
  193.   b1[0x05] = (b2[0x04] - b2[0x05]) * cos0;
  194.   b1[0x06] = b2[0x06] + b2[0x07];
  195.   b1[0x07] = (b2[0x07] - b2[0x06]) * cos0;
  196.   b1[0x06] += b1[0x07];
  197.   b1[0x04] += b1[0x06];
  198.   b1[0x06] += b1[0x05];
  199.   b1[0x05] += b1[0x07];
  201.   b1[0x08] = b2[0x08] + b2[0x09];
  202.   b1[0x09] = (b2[0x08] - b2[0x09]) * cos0;
  203.   b1[0x0A] = b2[0x0A] + b2[0x0B];
  204.   b1[0x0B] = (b2[0x0B] - b2[0x0A]) * cos0;
  205.   b1[0x0A] += b1[0x0B];
  207.   b1[0x0C] = b2[0x0C] + b2[0x0D];
  208.   b1[0x0D] = (b2[0x0C] - b2[0x0D]) * cos0;
  209.   b1[0x0E] = b2[0x0E] + b2[0x0F];
  210.   b1[0x0F] = (b2[0x0F] - b2[0x0E]) * cos0;
  211.   b1[0x0E] += b1[0x0F];
  212.   b1[0x0C] += b1[0x0E];
  213.   b1[0x0E] += b1[0x0D];
  214.   b1[0x0D] += b1[0x0F];
  216.   b1[0x10] = b2[0x10] + b2[0x11];
  217.   b1[0x11] = (b2[0x10] - b2[0x11]) * cos0;
  218.   b1[0x12] = b2[0x12] + b2[0x13];
  219.   b1[0x13] = (b2[0x13] - b2[0x12]) * cos0;
  220.   b1[0x12] += b1[0x13];
  222.   b1[0x14] = b2[0x14] + b2[0x15];
  223.   b1[0x15] = (b2[0x14] - b2[0x15]) * cos0;
  224.   b1[0x16] = b2[0x16] + b2[0x17];
  225.   b1[0x17] = (b2[0x17] - b2[0x16]) * cos0;
  226.   b1[0x16] += b1[0x17];
  227.   b1[0x14] += b1[0x16];
  228.   b1[0x16] += b1[0x15];
  229.   b1[0x15] += b1[0x17];
  231.   b1[0x18] = b2[0x18] + b2[0x19];
  232.   b1[0x19] = (b2[0x18] - b2[0x19]) * cos0;
  233.   b1[0x1A] = b2[0x1A] + b2[0x1B];
  234.   b1[0x1B] = (b2[0x1B] - b2[0x1A]) * cos0;
  235.   b1[0x1A] += b1[0x1B];
  237.   b1[0x1C] = b2[0x1C] + b2[0x1D];
  238.   b1[0x1D] = (b2[0x1C] - b2[0x1D]) * cos0;
  239.   b1[0x1E] = b2[0x1E] + b2[0x1F];
  240.   b1[0x1F] = (b2[0x1F] - b2[0x1E]) * cos0;
  241.   b1[0x1E] += b1[0x1F];
  242.   b1[0x1C] += b1[0x1E];
  243.   b1[0x1E] += b1[0x1D];
  244.   b1[0x1D] += b1[0x1F];
  245.  }
  247.  out0[0x10*16] = b1[0x00];
  248.  out0[0x10*12] = b1[0x04];
  249.  out0[0x10* 8] = b1[0x02];
  250.  out0[0x10* 4] = b1[0x06];
  251.  out0[0x10* 0] = b1[0x01];
  252.  out1[0x10* 0] = b1[0x01];
  253.  out1[0x10* 4] = b1[0x05];
  254.  out1[0x10* 8] = b1[0x03];
  255.  out1[0x10*12] = b1[0x07];
  257.  b1[0x08] += b1[0x0C];
  258.  out0[0x10*14] = b1[0x08];
  259.  b1[0x0C] += b1[0x0a];
  260.  out0[0x10*10] = b1[0x0C];
  261.  b1[0x0A] += b1[0x0E];
  262.  out0[0x10* 6] = b1[0x0A];
  263.  b1[0x0E] += b1[0x09];
  264.  out0[0x10* 2] = b1[0x0E];
  265.  b1[0x09] += b1[0x0D];
  266.  out1[0x10* 2] = b1[0x09];
  267.  b1[0x0D] += b1[0x0B];
  268.  out1[0x10* 6] = b1[0x0D];
  269.  b1[0x0B] += b1[0x0F];
  270.  out1[0x10*10] = b1[0x0B];
  271.  out1[0x10*14] = b1[0x0F];
  273.  b1[0x18] += b1[0x1C];
  274.  out0[0x10*15] = b1[0x10] + b1[0x18];
  275.  out0[0x10*13] = b1[0x18] + b1[0x14];
  276.  b1[0x1C] += b1[0x1a];
  277.  out0[0x10*11] = b1[0x14] + b1[0x1C];
  278.  out0[0x10* 9] = b1[0x1C] + b1[0x12];
  279.  b1[0x1A] += b1[0x1E];
  280.  out0[0x10* 7] = b1[0x12] + b1[0x1A];
  281.  out0[0x10* 5] = b1[0x1A] + b1[0x16];
  282.  b1[0x1E] += b1[0x19];
  283.  out0[0x10* 3] = b1[0x16] + b1[0x1E];
  284.  out0[0x10* 1] = b1[0x1E] + b1[0x11];
  285.  b1[0x19] += b1[0x1D];
  286.  out1[0x10* 1] = b1[0x11] + b1[0x19];
  287.  out1[0x10* 3] = b1[0x19] + b1[0x15];
  288.  b1[0x1D] += b1[0x1B];
  289.  out1[0x10* 5] = b1[0x15] + b1[0x1D];
  290.  out1[0x10* 7] = b1[0x1D] + b1[0x13];
  291.  b1[0x1B] += b1[0x1F];
  292.  out1[0x10* 9] = b1[0x13] + b1[0x1B];
  293.  out1[0x10*11] = b1[0x1B] + b1[0x17];
  294.  out1[0x10*13] = b1[0x17] + b1[0x1F];
  295.  out1[0x10*15] = b1[0x1F];
  296. }
  299. void dct64(real *a,real *b,real *c)
  300. {
  301.   real bufs[0x40];
  302.   dct64_1(a,b,bufs,bufs+0x20,c);
  303. }