Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | Download | RSS feed

  1. /*
  2.         dct64_i386.c: DCT64, a C variant for i386
  3.  
  4.         copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
  5.         see COPYING and AUTHORS files in distribution or http://mpg123.org
  6.         initially written by Michael Hipp
  7. */
  8.  
  9. /*
  10.  * Discrete Cosine Tansform (DCT) for subband synthesis
  11.  * optimized for machines with no auto-increment.
  12.  * The performance is highly compiler dependend. Maybe
  13.  * the dct64.c version for 'normal' processor may be faster
  14.  * even for Intel processors.
  15.  */
  16.  
  17. #include "mpg123lib_intern.h"
  18.  
  19. static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples)
  20. {
  21.  {
  22.   register real *costab = pnts[0];
  23.  
  24.   b1[0x00] = samples[0x00] + samples[0x1F];
  25.   b1[0x01] = samples[0x01] + samples[0x1E];
  26.   b1[0x1F] = REAL_MUL(samples[0x00] - samples[0x1F], costab[0x0]);
  27.   b1[0x1E] = REAL_MUL(samples[0x01] - samples[0x1E], costab[0x1]);
  28.  
  29.   b1[0x02] = samples[0x02] + samples[0x1D];
  30.   b1[0x03] = samples[0x03] + samples[0x1C];
  31.   b1[0x1D] = REAL_MUL(samples[0x02] - samples[0x1D], costab[0x2]);
  32.   b1[0x1C] = REAL_MUL(samples[0x03] - samples[0x1C], costab[0x3]);
  33.  
  34.   b1[0x04] = samples[0x04] + samples[0x1B];
  35.   b1[0x05] = samples[0x05] + samples[0x1A];
  36.   b1[0x1B] = REAL_MUL(samples[0x04] - samples[0x1B], costab[0x4]);
  37.   b1[0x1A] = REAL_MUL(samples[0x05] - samples[0x1A], costab[0x5]);
  38.  
  39.   b1[0x06] = samples[0x06] + samples[0x19];
  40.   b1[0x07] = samples[0x07] + samples[0x18];
  41.   b1[0x19] = REAL_MUL(samples[0x06] - samples[0x19], costab[0x6]);
  42.   b1[0x18] = REAL_MUL(samples[0x07] - samples[0x18], costab[0x7]);
  43.  
  44.   b1[0x08] = samples[0x08] + samples[0x17];
  45.   b1[0x09] = samples[0x09] + samples[0x16];
  46.   b1[0x17] = REAL_MUL(samples[0x08] - samples[0x17], costab[0x8]);
  47.   b1[0x16] = REAL_MUL(samples[0x09] - samples[0x16], costab[0x9]);
  48.  
  49.   b1[0x0A] = samples[0x0A] + samples[0x15];
  50.   b1[0x0B] = samples[0x0B] + samples[0x14];
  51.   b1[0x15] = REAL_MUL(samples[0x0A] - samples[0x15], costab[0xA]);
  52.   b1[0x14] = REAL_MUL(samples[0x0B] - samples[0x14], costab[0xB]);
  53.  
  54.   b1[0x0C] = samples[0x0C] + samples[0x13];
  55.   b1[0x0D] = samples[0x0D] + samples[0x12];
  56.   b1[0x13] = REAL_MUL(samples[0x0C] - samples[0x13], costab[0xC]);
  57.   b1[0x12] = REAL_MUL(samples[0x0D] - samples[0x12], costab[0xD]);
  58.  
  59.   b1[0x0E] = samples[0x0E] + samples[0x11];
  60.   b1[0x0F] = samples[0x0F] + samples[0x10];
  61.   b1[0x11] = REAL_MUL(samples[0x0E] - samples[0x11], costab[0xE]);
  62.   b1[0x10] = REAL_MUL(samples[0x0F] - samples[0x10], costab[0xF]);
  63.  
  64.  }
  65.  
  66.  
  67.  {
  68.   register real *costab = pnts[1];
  69.  
  70.   b2[0x00] = b1[0x00] + b1[0x0F];
  71.   b2[0x01] = b1[0x01] + b1[0x0E];
  72.   b2[0x0F] = REAL_MUL(b1[0x00] - b1[0x0F], costab[0]);
  73.   b2[0x0E] = REAL_MUL(b1[0x01] - b1[0x0E], costab[1]);
  74.  
  75.   b2[0x02] = b1[0x02] + b1[0x0D];
  76.   b2[0x03] = b1[0x03] + b1[0x0C];
  77.   b2[0x0D] = REAL_MUL(b1[0x02] - b1[0x0D], costab[2]);
  78.   b2[0x0C] = REAL_MUL(b1[0x03] - b1[0x0C], costab[3]);
  79.  
  80.   b2[0x04] = b1[0x04] + b1[0x0B];
  81.   b2[0x05] = b1[0x05] + b1[0x0A];
  82.   b2[0x0B] = REAL_MUL(b1[0x04] - b1[0x0B], costab[4]);
  83.   b2[0x0A] = REAL_MUL(b1[0x05] - b1[0x0A], costab[5]);
  84.  
  85.   b2[0x06] = b1[0x06] + b1[0x09];
  86.   b2[0x07] = b1[0x07] + b1[0x08];
  87.   b2[0x09] = REAL_MUL(b1[0x06] - b1[0x09], costab[6]);
  88.   b2[0x08] = REAL_MUL(b1[0x07] - b1[0x08], costab[7]);
  89.  
  90.   /* */
  91.  
  92.   b2[0x10] = b1[0x10] + b1[0x1F];
  93.   b2[0x11] = b1[0x11] + b1[0x1E];
  94.   b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x10], costab[0]);
  95.   b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x11], costab[1]);
  96.  
  97.   b2[0x12] = b1[0x12] + b1[0x1D];
  98.   b2[0x13] = b1[0x13] + b1[0x1C];
  99.   b2[0x1D] = REAL_MUL(b1[0x1D] - b1[0x12], costab[2]);
  100.   b2[0x1C] = REAL_MUL(b1[0x1C] - b1[0x13], costab[3]);
  101.  
  102.   b2[0x14] = b1[0x14] + b1[0x1B];
  103.   b2[0x15] = b1[0x15] + b1[0x1A];
  104.   b2[0x1B] = REAL_MUL(b1[0x1B] - b1[0x14], costab[4]);
  105.   b2[0x1A] = REAL_MUL(b1[0x1A] - b1[0x15], costab[5]);
  106.  
  107.   b2[0x16] = b1[0x16] + b1[0x19];
  108.   b2[0x17] = b1[0x17] + b1[0x18];
  109.   b2[0x19] = REAL_MUL(b1[0x19] - b1[0x16], costab[6]);
  110.   b2[0x18] = REAL_MUL(b1[0x18] - b1[0x17], costab[7]);
  111.  }
  112.  
  113.  {
  114.   register real *costab = pnts[2];
  115.  
  116.   b1[0x00] = b2[0x00] + b2[0x07];
  117.   b1[0x07] = REAL_MUL(b2[0x00] - b2[0x07], costab[0]);
  118.   b1[0x01] = b2[0x01] + b2[0x06];
  119.   b1[0x06] = REAL_MUL(b2[0x01] - b2[0x06], costab[1]);
  120.   b1[0x02] = b2[0x02] + b2[0x05];
  121.   b1[0x05] = REAL_MUL(b2[0x02] - b2[0x05], costab[2]);
  122.   b1[0x03] = b2[0x03] + b2[0x04];
  123.   b1[0x04] = REAL_MUL(b2[0x03] - b2[0x04], costab[3]);
  124.  
  125.   b1[0x08] = b2[0x08] + b2[0x0F];
  126.   b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x08], costab[0]);
  127.   b1[0x09] = b2[0x09] + b2[0x0E];
  128.   b1[0x0E] = REAL_MUL(b2[0x0E] - b2[0x09], costab[1]);
  129.   b1[0x0A] = b2[0x0A] + b2[0x0D];
  130.   b1[0x0D] = REAL_MUL(b2[0x0D] - b2[0x0A], costab[2]);
  131.   b1[0x0B] = b2[0x0B] + b2[0x0C];
  132.   b1[0x0C] = REAL_MUL(b2[0x0C] - b2[0x0B], costab[3]);
  133.  
  134.   b1[0x10] = b2[0x10] + b2[0x17];
  135.   b1[0x17] = REAL_MUL(b2[0x10] - b2[0x17], costab[0]);
  136.   b1[0x11] = b2[0x11] + b2[0x16];
  137.   b1[0x16] = REAL_MUL(b2[0x11] - b2[0x16], costab[1]);
  138.   b1[0x12] = b2[0x12] + b2[0x15];
  139.   b1[0x15] = REAL_MUL(b2[0x12] - b2[0x15], costab[2]);
  140.   b1[0x13] = b2[0x13] + b2[0x14];
  141.   b1[0x14] = REAL_MUL(b2[0x13] - b2[0x14], costab[3]);
  142.  
  143.   b1[0x18] = b2[0x18] + b2[0x1F];
  144.   b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x18], costab[0]);
  145.   b1[0x19] = b2[0x19] + b2[0x1E];
  146.   b1[0x1E] = REAL_MUL(b2[0x1E] - b2[0x19], costab[1]);
  147.   b1[0x1A] = b2[0x1A] + b2[0x1D];
  148.   b1[0x1D] = REAL_MUL(b2[0x1D] - b2[0x1A], costab[2]);
  149.   b1[0x1B] = b2[0x1B] + b2[0x1C];
  150.   b1[0x1C] = REAL_MUL(b2[0x1C] - b2[0x1B], costab[3]);
  151.  }
  152.  
  153.  {
  154.   register real const cos0 = pnts[3][0];
  155.   register real const cos1 = pnts[3][1];
  156.  
  157.   b2[0x00] = b1[0x00] + b1[0x03];
  158.   b2[0x03] = REAL_MUL(b1[0x00] - b1[0x03], cos0);
  159.   b2[0x01] = b1[0x01] + b1[0x02];
  160.   b2[0x02] = REAL_MUL(b1[0x01] - b1[0x02], cos1);
  161.  
  162.   b2[0x04] = b1[0x04] + b1[0x07];
  163.   b2[0x07] = REAL_MUL(b1[0x07] - b1[0x04], cos0);
  164.   b2[0x05] = b1[0x05] + b1[0x06];
  165.   b2[0x06] = REAL_MUL(b1[0x06] - b1[0x05], cos1);
  166.  
  167.   b2[0x08] = b1[0x08] + b1[0x0B];
  168.   b2[0x0B] = REAL_MUL(b1[0x08] - b1[0x0B], cos0);
  169.   b2[0x09] = b1[0x09] + b1[0x0A];
  170.   b2[0x0A] = REAL_MUL(b1[0x09] - b1[0x0A], cos1);
  171.  
  172.   b2[0x0C] = b1[0x0C] + b1[0x0F];
  173.   b2[0x0F] = REAL_MUL(b1[0x0F] - b1[0x0C], cos0);
  174.   b2[0x0D] = b1[0x0D] + b1[0x0E];
  175.   b2[0x0E] = REAL_MUL(b1[0x0E] - b1[0x0D], cos1);
  176.  
  177.   b2[0x10] = b1[0x10] + b1[0x13];
  178.   b2[0x13] = REAL_MUL(b1[0x10] - b1[0x13], cos0);
  179.   b2[0x11] = b1[0x11] + b1[0x12];
  180.   b2[0x12] = REAL_MUL(b1[0x11] - b1[0x12], cos1);
  181.  
  182.   b2[0x14] = b1[0x14] + b1[0x17];
  183.   b2[0x17] = REAL_MUL(b1[0x17] - b1[0x14], cos0);
  184.   b2[0x15] = b1[0x15] + b1[0x16];
  185.   b2[0x16] = REAL_MUL(b1[0x16] - b1[0x15], cos1);
  186.  
  187.   b2[0x18] = b1[0x18] + b1[0x1B];
  188.   b2[0x1B] = REAL_MUL(b1[0x18] - b1[0x1B], cos0);
  189.   b2[0x19] = b1[0x19] + b1[0x1A];
  190.   b2[0x1A] = REAL_MUL(b1[0x19] - b1[0x1A], cos1);
  191.  
  192.   b2[0x1C] = b1[0x1C] + b1[0x1F];
  193.   b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x1C], cos0);
  194.   b2[0x1D] = b1[0x1D] + b1[0x1E];
  195.   b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x1D], cos1);
  196.  }
  197.  
  198.  {
  199.   register real const cos0 = pnts[4][0];
  200.  
  201.   b1[0x00] = b2[0x00] + b2[0x01];
  202.   b1[0x01] = REAL_MUL(b2[0x00] - b2[0x01], cos0);
  203.   b1[0x02] = b2[0x02] + b2[0x03];
  204.   b1[0x03] = REAL_MUL(b2[0x03] - b2[0x02], cos0);
  205.   b1[0x02] += b1[0x03];
  206.  
  207.   b1[0x04] = b2[0x04] + b2[0x05];
  208.   b1[0x05] = REAL_MUL(b2[0x04] - b2[0x05], cos0);
  209.   b1[0x06] = b2[0x06] + b2[0x07];
  210.   b1[0x07] = REAL_MUL(b2[0x07] - b2[0x06], cos0);
  211.   b1[0x06] += b1[0x07];
  212.   b1[0x04] += b1[0x06];
  213.   b1[0x06] += b1[0x05];
  214.   b1[0x05] += b1[0x07];
  215.  
  216.   b1[0x08] = b2[0x08] + b2[0x09];
  217.   b1[0x09] = REAL_MUL(b2[0x08] - b2[0x09], cos0);
  218.   b1[0x0A] = b2[0x0A] + b2[0x0B];
  219.   b1[0x0B] = REAL_MUL(b2[0x0B] - b2[0x0A], cos0);
  220.   b1[0x0A] += b1[0x0B];
  221.  
  222.   b1[0x0C] = b2[0x0C] + b2[0x0D];
  223.   b1[0x0D] = REAL_MUL(b2[0x0C] - b2[0x0D], cos0);
  224.   b1[0x0E] = b2[0x0E] + b2[0x0F];
  225.   b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x0E], cos0);
  226.   b1[0x0E] += b1[0x0F];
  227.   b1[0x0C] += b1[0x0E];
  228.   b1[0x0E] += b1[0x0D];
  229.   b1[0x0D] += b1[0x0F];
  230.  
  231.   b1[0x10] = b2[0x10] + b2[0x11];
  232.   b1[0x11] = REAL_MUL(b2[0x10] - b2[0x11], cos0);
  233.   b1[0x12] = b2[0x12] + b2[0x13];
  234.   b1[0x13] = REAL_MUL(b2[0x13] - b2[0x12], cos0);
  235.   b1[0x12] += b1[0x13];
  236.  
  237.   b1[0x14] = b2[0x14] + b2[0x15];
  238.   b1[0x15] = REAL_MUL(b2[0x14] - b2[0x15], cos0);
  239.   b1[0x16] = b2[0x16] + b2[0x17];
  240.   b1[0x17] = REAL_MUL(b2[0x17] - b2[0x16], cos0);
  241.   b1[0x16] += b1[0x17];
  242.   b1[0x14] += b1[0x16];
  243.   b1[0x16] += b1[0x15];
  244.   b1[0x15] += b1[0x17];
  245.  
  246.   b1[0x18] = b2[0x18] + b2[0x19];
  247.   b1[0x19] = REAL_MUL(b2[0x18] - b2[0x19], cos0);
  248.   b1[0x1A] = b2[0x1A] + b2[0x1B];
  249.   b1[0x1B] = REAL_MUL(b2[0x1B] - b2[0x1A], cos0);
  250.   b1[0x1A] += b1[0x1B];
  251.  
  252.   b1[0x1C] = b2[0x1C] + b2[0x1D];
  253.   b1[0x1D] = REAL_MUL(b2[0x1C] - b2[0x1D], cos0);
  254.   b1[0x1E] = b2[0x1E] + b2[0x1F];
  255.   b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x1E], cos0);
  256.   b1[0x1E] += b1[0x1F];
  257.   b1[0x1C] += b1[0x1E];
  258.   b1[0x1E] += b1[0x1D];
  259.   b1[0x1D] += b1[0x1F];
  260.  }
  261.  
  262.  out0[0x10*16] = REAL_SCALE_DCT64(b1[0x00]);
  263.  out0[0x10*12] = REAL_SCALE_DCT64(b1[0x04]);
  264.  out0[0x10* 8] = REAL_SCALE_DCT64(b1[0x02]);
  265.  out0[0x10* 4] = REAL_SCALE_DCT64(b1[0x06]);
  266.  out0[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]);
  267.  out1[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]);
  268.  out1[0x10* 4] = REAL_SCALE_DCT64(b1[0x05]);
  269.  out1[0x10* 8] = REAL_SCALE_DCT64(b1[0x03]);
  270.  out1[0x10*12] = REAL_SCALE_DCT64(b1[0x07]);
  271.  
  272. #if 1
  273.  out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08] + b1[0x0C]);
  274.  out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C] + b1[0x0a]);
  275.  out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A] + b1[0x0E]);
  276.  out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E] + b1[0x09]);
  277.  out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09] + b1[0x0D]);
  278.  out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D] + b1[0x0B]);
  279.  out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B] + b1[0x0F]);
  280.  out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]);
  281. #else
  282.  b1[0x08] += b1[0x0C];
  283.  out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08]);
  284.  b1[0x0C] += b1[0x0a];
  285.  out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C]);
  286.  b1[0x0A] += b1[0x0E];
  287.  out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A]);
  288.  b1[0x0E] += b1[0x09];
  289.  out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E]);
  290.  b1[0x09] += b1[0x0D];
  291.  out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09]);
  292.  b1[0x0D] += b1[0x0B];
  293.  out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D]);
  294.  b1[0x0B] += b1[0x0F];
  295.  out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B]);
  296.  out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]);
  297. #endif
  298.  
  299.  {
  300.  real tmp;
  301.  tmp = b1[0x18] + b1[0x1C];
  302.  out0[0x10*15] = REAL_SCALE_DCT64(tmp + b1[0x10]);
  303.  out0[0x10*13] = REAL_SCALE_DCT64(tmp + b1[0x14]);
  304.  tmp = b1[0x1C] + b1[0x1A];
  305.  out0[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x14]);
  306.  out0[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x12]);
  307.  tmp = b1[0x1A] + b1[0x1E];
  308.  out0[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x12]);
  309.  out0[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x16]);
  310.  tmp = b1[0x1E] + b1[0x19];
  311.  out0[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x16]);
  312.  out0[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]);
  313.  tmp = b1[0x19] + b1[0x1D];
  314.  out1[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]);
  315.  out1[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x15]);
  316.  tmp = b1[0x1D] + b1[0x1B];
  317.  out1[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x15]);
  318.  out1[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x13]);
  319.  tmp = b1[0x1B] + b1[0x1F];
  320.  out1[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x13]);
  321.  out1[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x17]);
  322.  out1[0x10*13] = REAL_SCALE_DCT64(b1[0x17] + b1[0x1F]);
  323.  out1[0x10*15] = REAL_SCALE_DCT64(b1[0x1F]);
  324.  }
  325. }
  326.  
  327. /*
  328.  * the call via dct64 is a trick to force GCC to use
  329.  * (new) registers for the b1,b2 pointer to the bufs[xx] field
  330.  */
  331. void dct64_i386(real *a,real *b,real *c)
  332. {
  333.   real bufs[0x40];
  334.   dct64_1(a,b,bufs,bufs+0x20,c);
  335. }
  336.  
  337.