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C/C++ Source or Header  |  2001-02-05  |  9.5 KB  |  326 lines
  1. /*
  2.  * Discrete Cosine Tansform (DCT) for subband synthesis
  3.  * optimized for machines with no auto-increment. 
  4.  * The performance is highly compiler dependend. Maybe
  5.  * the dct64.c version for 'normal' processor may be faster
  6.  * even for Intel processors.
  7.  */
  8.  
  9. /* $Id: dct64_i386.c,v 1.9 2001/01/05 15:20:34 aleidinger Exp $ */
  10.  
  11. #ifdef HAVE_CONFIG_H
  12. #include <config.h>
  13. #endif
  14.  
  15. #include "dct64_i386.h"
  16. #include "tabinit.h"
  17.  
  18. #ifdef WITH_DMALLOC
  19. #include <dmalloc.h>
  20. #endif
  21.  
  22. static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples)
  23. {
  24.  
  25.  {
  26.   register real *costab = pnts[0];
  27.  
  28.   b1[0x00] = samples[0x00] + samples[0x1F];
  29.   b1[0x1F] = (samples[0x00] - samples[0x1F]) * costab[0x0];
  30.  
  31.   b1[0x01] = samples[0x01] + samples[0x1E];
  32.   b1[0x1E] = (samples[0x01] - samples[0x1E]) * costab[0x1];
  33.  
  34.   b1[0x02] = samples[0x02] + samples[0x1D];
  35.   b1[0x1D] = (samples[0x02] - samples[0x1D]) * costab[0x2];
  36.  
  37.   b1[0x03] = samples[0x03] + samples[0x1C];
  38.   b1[0x1C] = (samples[0x03] - samples[0x1C]) * costab[0x3];
  39.  
  40.   b1[0x04] = samples[0x04] + samples[0x1B];
  41.   b1[0x1B] = (samples[0x04] - samples[0x1B]) * costab[0x4];
  42.  
  43.   b1[0x05] = samples[0x05] + samples[0x1A];
  44.   b1[0x1A] = (samples[0x05] - samples[0x1A]) * costab[0x5];
  45.  
  46.   b1[0x06] = samples[0x06] + samples[0x19];
  47.   b1[0x19] = (samples[0x06] - samples[0x19]) * costab[0x6];
  48.  
  49.   b1[0x07] = samples[0x07] + samples[0x18];
  50.   b1[0x18] = (samples[0x07] - samples[0x18]) * costab[0x7];
  51.  
  52.   b1[0x08] = samples[0x08] + samples[0x17];
  53.   b1[0x17] = (samples[0x08] - samples[0x17]) * costab[0x8];
  54.  
  55.   b1[0x09] = samples[0x09] + samples[0x16];
  56.   b1[0x16] = (samples[0x09] - samples[0x16]) * costab[0x9];
  57.  
  58.   b1[0x0A] = samples[0x0A] + samples[0x15];
  59.   b1[0x15] = (samples[0x0A] - samples[0x15]) * costab[0xA];
  60.  
  61.   b1[0x0B] = samples[0x0B] + samples[0x14];
  62.   b1[0x14] = (samples[0x0B] - samples[0x14]) * costab[0xB];
  63.  
  64.   b1[0x0C] = samples[0x0C] + samples[0x13];
  65.   b1[0x13] = (samples[0x0C] - samples[0x13]) * costab[0xC];
  66.  
  67.   b1[0x0D] = samples[0x0D] + samples[0x12];
  68.   b1[0x12] = (samples[0x0D] - samples[0x12]) * costab[0xD];
  69.  
  70.   b1[0x0E] = samples[0x0E] + samples[0x11];
  71.   b1[0x11] = (samples[0x0E] - samples[0x11]) * costab[0xE];
  72.  
  73.   b1[0x0F] = samples[0x0F] + samples[0x10];
  74.   b1[0x10] = (samples[0x0F] - samples[0x10]) * costab[0xF];
  75.  }
  76.  
  77.  
  78.  {
  79.   register real *costab = pnts[1];
  80.  
  81.   b2[0x00] = b1[0x00] + b1[0x0F]; 
  82.   b2[0x0F] = (b1[0x00] - b1[0x0F]) * costab[0];
  83.   b2[0x01] = b1[0x01] + b1[0x0E]; 
  84.   b2[0x0E] = (b1[0x01] - b1[0x0E]) * costab[1];
  85.   b2[0x02] = b1[0x02] + b1[0x0D]; 
  86.   b2[0x0D] = (b1[0x02] - b1[0x0D]) * costab[2];
  87.   b2[0x03] = b1[0x03] + b1[0x0C]; 
  88.   b2[0x0C] = (b1[0x03] - b1[0x0C]) * costab[3];
  89.   b2[0x04] = b1[0x04] + b1[0x0B]; 
  90.   b2[0x0B] = (b1[0x04] - b1[0x0B]) * costab[4];
  91.   b2[0x05] = b1[0x05] + b1[0x0A]; 
  92.   b2[0x0A] = (b1[0x05] - b1[0x0A]) * costab[5];
  93.   b2[0x06] = b1[0x06] + b1[0x09]; 
  94.   b2[0x09] = (b1[0x06] - b1[0x09]) * costab[6];
  95.   b2[0x07] = b1[0x07] + b1[0x08]; 
  96.   b2[0x08] = (b1[0x07] - b1[0x08]) * costab[7];
  97.  
  98.   b2[0x10] = b1[0x10] + b1[0x1F];
  99.   b2[0x1F] = (b1[0x1F] - b1[0x10]) * costab[0];
  100.   b2[0x11] = b1[0x11] + b1[0x1E];
  101.   b2[0x1E] = (b1[0x1E] - b1[0x11]) * costab[1];
  102.   b2[0x12] = b1[0x12] + b1[0x1D];
  103.   b2[0x1D] = (b1[0x1D] - b1[0x12]) * costab[2];
  104.   b2[0x13] = b1[0x13] + b1[0x1C];
  105.   b2[0x1C] = (b1[0x1C] - b1[0x13]) * costab[3];
  106.   b2[0x14] = b1[0x14] + b1[0x1B];
  107.   b2[0x1B] = (b1[0x1B] - b1[0x14]) * costab[4];
  108.   b2[0x15] = b1[0x15] + b1[0x1A];
  109.   b2[0x1A] = (b1[0x1A] - b1[0x15]) * costab[5];
  110.   b2[0x16] = b1[0x16] + b1[0x19];
  111.   b2[0x19] = (b1[0x19] - b1[0x16]) * costab[6];
  112.   b2[0x17] = b1[0x17] + b1[0x18];
  113.   b2[0x18] = (b1[0x18] - b1[0x17]) * costab[7];
  114.  }
  115.  
  116.  {
  117.   register real *costab = pnts[2];
  118.  
  119.   b1[0x00] = b2[0x00] + b2[0x07];
  120.   b1[0x07] = (b2[0x00] - b2[0x07]) * costab[0];
  121.   b1[0x01] = b2[0x01] + b2[0x06];
  122.   b1[0x06] = (b2[0x01] - b2[0x06]) * costab[1];
  123.   b1[0x02] = b2[0x02] + b2[0x05];
  124.   b1[0x05] = (b2[0x02] - b2[0x05]) * costab[2];
  125.   b1[0x03] = b2[0x03] + b2[0x04];
  126.   b1[0x04] = (b2[0x03] - b2[0x04]) * costab[3];
  127.  
  128.   b1[0x08] = b2[0x08] + b2[0x0F];
  129.   b1[0x0F] = (b2[0x0F] - b2[0x08]) * costab[0];
  130.   b1[0x09] = b2[0x09] + b2[0x0E];
  131.   b1[0x0E] = (b2[0x0E] - b2[0x09]) * costab[1];
  132.   b1[0x0A] = b2[0x0A] + b2[0x0D];
  133.   b1[0x0D] = (b2[0x0D] - b2[0x0A]) * costab[2];
  134.   b1[0x0B] = b2[0x0B] + b2[0x0C];
  135.   b1[0x0C] = (b2[0x0C] - b2[0x0B]) * costab[3];
  136.  
  137.   b1[0x10] = b2[0x10] + b2[0x17];
  138.   b1[0x17] = (b2[0x10] - b2[0x17]) * costab[0];
  139.   b1[0x11] = b2[0x11] + b2[0x16];
  140.   b1[0x16] = (b2[0x11] - b2[0x16]) * costab[1];
  141.   b1[0x12] = b2[0x12] + b2[0x15];
  142.   b1[0x15] = (b2[0x12] - b2[0x15]) * costab[2];
  143.   b1[0x13] = b2[0x13] + b2[0x14];
  144.   b1[0x14] = (b2[0x13] - b2[0x14]) * costab[3];
  145.  
  146.   b1[0x18] = b2[0x18] + b2[0x1F];
  147.   b1[0x1F] = (b2[0x1F] - b2[0x18]) * costab[0];
  148.   b1[0x19] = b2[0x19] + b2[0x1E];
  149.   b1[0x1E] = (b2[0x1E] - b2[0x19]) * costab[1];
  150.   b1[0x1A] = b2[0x1A] + b2[0x1D];
  151.   b1[0x1D] = (b2[0x1D] - b2[0x1A]) * costab[2];
  152.   b1[0x1B] = b2[0x1B] + b2[0x1C];
  153.   b1[0x1C] = (b2[0x1C] - b2[0x1B]) * costab[3];
  154.  }
  155.  
  156.  {
  157.   register real const cos0 = pnts[3][0];
  158.   register real const cos1 = pnts[3][1];
  159.  
  160.   b2[0x00] = b1[0x00] + b1[0x03];
  161.   b2[0x03] = (b1[0x00] - b1[0x03]) * cos0;
  162.   b2[0x01] = b1[0x01] + b1[0x02];
  163.   b2[0x02] = (b1[0x01] - b1[0x02]) * cos1;
  164.  
  165.   b2[0x04] = b1[0x04] + b1[0x07];
  166.   b2[0x07] = (b1[0x07] - b1[0x04]) * cos0;
  167.   b2[0x05] = b1[0x05] + b1[0x06];
  168.   b2[0x06] = (b1[0x06] - b1[0x05]) * cos1;
  169.  
  170.   b2[0x08] = b1[0x08] + b1[0x0B];
  171.   b2[0x0B] = (b1[0x08] - b1[0x0B]) * cos0;
  172.   b2[0x09] = b1[0x09] + b1[0x0A];
  173.   b2[0x0A] = (b1[0x09] - b1[0x0A]) * cos1;
  174.   
  175.   b2[0x0C] = b1[0x0C] + b1[0x0F];
  176.   b2[0x0F] = (b1[0x0F] - b1[0x0C]) * cos0;
  177.   b2[0x0D] = b1[0x0D] + b1[0x0E];
  178.   b2[0x0E] = (b1[0x0E] - b1[0x0D]) * cos1;
  179.  
  180.   b2[0x10] = b1[0x10] + b1[0x13];
  181.   b2[0x13] = (b1[0x10] - b1[0x13]) * cos0;
  182.   b2[0x11] = b1[0x11] + b1[0x12];
  183.   b2[0x12] = (b1[0x11] - b1[0x12]) * cos1;
  184.  
  185.   b2[0x14] = b1[0x14] + b1[0x17];
  186.   b2[0x17] = (b1[0x17] - b1[0x14]) * cos0;
  187.   b2[0x15] = b1[0x15] + b1[0x16];
  188.   b2[0x16] = (b1[0x16] - b1[0x15]) * cos1;
  189.  
  190.   b2[0x18] = b1[0x18] + b1[0x1B];
  191.   b2[0x1B] = (b1[0x18] - b1[0x1B]) * cos0;
  192.   b2[0x19] = b1[0x19] + b1[0x1A];
  193.   b2[0x1A] = (b1[0x19] - b1[0x1A]) * cos1;
  194.  
  195.   b2[0x1C] = b1[0x1C] + b1[0x1F];
  196.   b2[0x1F] = (b1[0x1F] - b1[0x1C]) * cos0;
  197.   b2[0x1D] = b1[0x1D] + b1[0x1E];
  198.   b2[0x1E] = (b1[0x1E] - b1[0x1D]) * cos1;
  199.  }
  200.  
  201.  {
  202.   register real const cos0 = pnts[4][0];
  203.  
  204.   b1[0x00] = b2[0x00] + b2[0x01];
  205.   b1[0x01] = (b2[0x00] - b2[0x01]) * cos0;
  206.   b1[0x02] = b2[0x02] + b2[0x03];
  207.   b1[0x03] = (b2[0x03] - b2[0x02]) * cos0;
  208.   b1[0x02] += b1[0x03];
  209.  
  210.   b1[0x04] = b2[0x04] + b2[0x05];
  211.   b1[0x05] = (b2[0x04] - b2[0x05]) * cos0;
  212.   b1[0x06] = b2[0x06] + b2[0x07];
  213.   b1[0x07] = (b2[0x07] - b2[0x06]) * cos0;
  214.   b1[0x06] += b1[0x07];
  215.   b1[0x04] += b1[0x06];
  216.   b1[0x06] += b1[0x05];
  217.   b1[0x05] += b1[0x07];
  218.  
  219.   b1[0x08] = b2[0x08] + b2[0x09];
  220.   b1[0x09] = (b2[0x08] - b2[0x09]) * cos0;
  221.   b1[0x0A] = b2[0x0A] + b2[0x0B];
  222.   b1[0x0B] = (b2[0x0B] - b2[0x0A]) * cos0;
  223.   b1[0x0A] += b1[0x0B];
  224.  
  225.   b1[0x0C] = b2[0x0C] + b2[0x0D];
  226.   b1[0x0D] = (b2[0x0C] - b2[0x0D]) * cos0;
  227.   b1[0x0E] = b2[0x0E] + b2[0x0F];
  228.   b1[0x0F] = (b2[0x0F] - b2[0x0E]) * cos0;
  229.   b1[0x0E] += b1[0x0F];
  230.   b1[0x0C] += b1[0x0E];
  231.   b1[0x0E] += b1[0x0D];
  232.   b1[0x0D] += b1[0x0F];
  233.  
  234.   b1[0x10] = b2[0x10] + b2[0x11];
  235.   b1[0x11] = (b2[0x10] - b2[0x11]) * cos0;
  236.   b1[0x12] = b2[0x12] + b2[0x13];
  237.   b1[0x13] = (b2[0x13] - b2[0x12]) * cos0;
  238.   b1[0x12] += b1[0x13];
  239.  
  240.   b1[0x14] = b2[0x14] + b2[0x15];
  241.   b1[0x15] = (b2[0x14] - b2[0x15]) * cos0;
  242.   b1[0x16] = b2[0x16] + b2[0x17];
  243.   b1[0x17] = (b2[0x17] - b2[0x16]) * cos0;
  244.   b1[0x16] += b1[0x17];
  245.   b1[0x14] += b1[0x16];
  246.   b1[0x16] += b1[0x15];
  247.   b1[0x15] += b1[0x17];
  248.  
  249.   b1[0x18] = b2[0x18] + b2[0x19];
  250.   b1[0x19] = (b2[0x18] - b2[0x19]) * cos0;
  251.   b1[0x1A] = b2[0x1A] + b2[0x1B];
  252.   b1[0x1B] = (b2[0x1B] - b2[0x1A]) * cos0;
  253.   b1[0x1A] += b1[0x1B];
  254.  
  255.   b1[0x1C] = b2[0x1C] + b2[0x1D];
  256.   b1[0x1D] = (b2[0x1C] - b2[0x1D]) * cos0;
  257.   b1[0x1E] = b2[0x1E] + b2[0x1F];
  258.   b1[0x1F] = (b2[0x1F] - b2[0x1E]) * cos0;
  259.   b1[0x1E] += b1[0x1F];
  260.   b1[0x1C] += b1[0x1E];
  261.   b1[0x1E] += b1[0x1D];
  262.   b1[0x1D] += b1[0x1F];
  263.  }
  264.  
  265.  out0[0x10*16] = b1[0x00];
  266.  out0[0x10*12] = b1[0x04];
  267.  out0[0x10* 8] = b1[0x02];
  268.  out0[0x10* 4] = b1[0x06];
  269.  out0[0x10* 0] = b1[0x01];
  270.  out1[0x10* 0] = b1[0x01];
  271.  out1[0x10* 4] = b1[0x05];
  272.  out1[0x10* 8] = b1[0x03];
  273.  out1[0x10*12] = b1[0x07];
  274.  
  275.  b1[0x08] += b1[0x0C];
  276.  out0[0x10*14] = b1[0x08];
  277.  b1[0x0C] += b1[0x0a];
  278.  out0[0x10*10] = b1[0x0C];
  279.  b1[0x0A] += b1[0x0E];
  280.  out0[0x10* 6] = b1[0x0A];
  281.  b1[0x0E] += b1[0x09];
  282.  out0[0x10* 2] = b1[0x0E];
  283.  b1[0x09] += b1[0x0D];
  284.  out1[0x10* 2] = b1[0x09];
  285.  b1[0x0D] += b1[0x0B];
  286.  out1[0x10* 6] = b1[0x0D];
  287.  b1[0x0B] += b1[0x0F];
  288.  out1[0x10*10] = b1[0x0B];
  289.  out1[0x10*14] = b1[0x0F];
  290.  
  291.  b1[0x18] += b1[0x1C];
  292.  out0[0x10*15] = b1[0x10] + b1[0x18];
  293.  out0[0x10*13] = b1[0x18] + b1[0x14];
  294.  b1[0x1C] += b1[0x1a];
  295.  out0[0x10*11] = b1[0x14] + b1[0x1C];
  296.  out0[0x10* 9] = b1[0x1C] + b1[0x12];
  297.  b1[0x1A] += b1[0x1E];
  298.  out0[0x10* 7] = b1[0x12] + b1[0x1A];
  299.  out0[0x10* 5] = b1[0x1A] + b1[0x16];
  300.  b1[0x1E] += b1[0x19];
  301.  out0[0x10* 3] = b1[0x16] + b1[0x1E];
  302.  out0[0x10* 1] = b1[0x1E] + b1[0x11];
  303.  b1[0x19] += b1[0x1D];
  304.  out1[0x10* 1] = b1[0x11] + b1[0x19];
  305.  out1[0x10* 3] = b1[0x19] + b1[0x15];
  306.  b1[0x1D] += b1[0x1B];
  307.  out1[0x10* 5] = b1[0x15] + b1[0x1D];
  308.  out1[0x10* 7] = b1[0x1D] + b1[0x13];
  309.  b1[0x1B] += b1[0x1F];
  310.  out1[0x10* 9] = b1[0x13] + b1[0x1B];
  311.  out1[0x10*11] = b1[0x1B] + b1[0x17];
  312.  out1[0x10*13] = b1[0x17] + b1[0x1F];
  313.  out1[0x10*15] = b1[0x1F];
  314. }
  315.  
  316. /*
  317.  * the call via dct64 is a trick to force GCC to use
  318.  * (new) registers for the b1,b2 pointer to the bufs[xx] field
  319.  */
  320. void dct64( real *a,real *b,real *c)
  321. {
  322.   real bufs[0x40];
  323.   dct64_1(a,b,bufs,bufs+0x20,c);
  324. }
  325.  
  326.