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FFmpeg/libavcodec/dct-test.c

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  1. /*

  2.  * (c) 2001 Fabrice Bellard

  3.  *     2007 Marc Hoffman <marc.hoffman@analog.com>

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file dct-test.c

  24.  * DCT test. (c) 2001 Fabrice Bellard.

  25.  * Started from sample code by Juan J. Sierralta P.

  26.  */

  27. 

  28. #include <stdlib.h>

  29. #include <stdio.h>

  30. #include <string.h>

  31. #include <sys/time.h>

  32. #include <unistd.h>

  33. #include <math.h>

  34. 

  35. #include "libavutil/common.h"

  36. #include "dsputil.h"

  37. 

  38. #include "simple_idct.h"

  39. #include "faandct.h"

  40. #include "faanidct.h"

  41. #include "i386/idct_xvid.h"

  42. 

  43. #undef printf

  44. #undef random

  45. 

  46. void *fast_memcpy(void *a, const void *b, size_t c){return memcpy(a,b,c);};

  47. 

  48. /* reference fdct/idct */

  49. extern void fdct(DCTELEM *block);

  50. extern void idct(DCTELEM *block);

  51. extern void init_fdct();

  52. 

  53. extern void ff_mmx_idct(DCTELEM *data);

  54. extern void ff_mmxext_idct(DCTELEM *data);

  55. 

  56. extern void odivx_idct_c (short *block);

  57. 

  58. // BFIN

  59. extern void ff_bfin_idct (DCTELEM *block)  ;

  60. extern void ff_bfin_fdct (DCTELEM *block) ;

  61. 

  62. // ALTIVEC

  63. extern void fdct_altivec (DCTELEM *block);

  64. //extern void idct_altivec (DCTELEM *block);?? no routine

  65. 

  66. 

  67. struct algo {

  68.   const char *name;

  69.   enum { FDCT, IDCT } is_idct;

  70.   void (* func) (DCTELEM *block);

  71.   void (* ref)  (DCTELEM *block);

  72.   enum formattag { NO_PERM,MMX_PERM, MMX_SIMPLE_PERM, SCALE_PERM, SSE2_PERM, LIBMPEG2_PERM } format;

  73.   int  mm_support;

  74. };

  75. 

  76. #ifndef FAAN_POSTSCALE

  77. #define FAAN_SCALE SCALE_PERM

  78. #else

  79. #define FAAN_SCALE NO_PERM

  80. #endif

  81. 

  82. struct algo algos[] = {

  83.   {"REF-DBL",         0, fdct,               fdct, NO_PERM},

  84.   {"FAAN",            0, ff_faandct,         fdct, FAAN_SCALE},

  85.   {"FAANI",           1, ff_faanidct,        idct, NO_PERM},

  86.   {"IJG-AAN-INT",     0, fdct_ifast,         fdct, SCALE_PERM},

  87.   {"IJG-LLM-INT",     0, ff_jpeg_fdct_islow, fdct, NO_PERM},

  88.   {"REF-DBL",         1, idct,               idct, NO_PERM},

  89.   {"INT",             1, j_rev_dct,          idct, MMX_PERM},

  90.   {"SIMPLE-C",        1, ff_simple_idct,     idct, NO_PERM},

  91. 

  92. #ifdef HAVE_MMX

  93.   {"MMX",             0, ff_fdct_mmx,        fdct, NO_PERM, MM_MMX},

  94. #ifdef HAVE_MMX2

  95.   {"MMX2",            0, ff_fdct_mmx2,       fdct, NO_PERM, MM_MMXEXT},

  96. #endif

  97. 

  98. #ifdef CONFIG_GPL

  99.   {"LIBMPEG2-MMX",    1, ff_mmx_idct,        idct, MMX_PERM, MM_MMX},

  100.   {"LIBMPEG2-MMXEXT", 1, ff_mmxext_idct,     idct, MMX_PERM, MM_MMXEXT},

  101. #endif

  102.   {"SIMPLE-MMX",      1, ff_simple_idct_mmx, idct, MMX_SIMPLE_PERM, MM_MMX},

  103.   {"XVID-MMX",        1, ff_idct_xvid_mmx,   idct, NO_PERM, MM_MMX},

  104.   {"XVID-MMX2",       1, ff_idct_xvid_mmx2,  idct, NO_PERM, MM_MMXEXT},

  105.   {"XVID-SSE2",       1, ff_idct_xvid_sse2,  idct, SSE2_PERM, MM_SSE2},

  106. #endif

  107. 

  108. #ifdef HAVE_ALTIVEC

  109.   {"altivecfdct",     0, fdct_altivec,       fdct, NO_PERM, MM_ALTIVEC},

  110. #endif

  111. 

  112. #ifdef ARCH_BFIN

  113.   {"BFINfdct",        0, ff_bfin_fdct,       fdct, NO_PERM},

  114.   {"BFINidct",        1, ff_bfin_idct,       idct, NO_PERM},

  115. #endif

  116. 

  117.   { 0 }

  118. };

  119. 

  120. #define AANSCALE_BITS 12

  121. static const unsigned short aanscales[64] = {

  122.     /* precomputed values scaled up by 14 bits */

  123.     16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,

  124.     22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,

  125.     21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,

  126.     19266, 26722, 25172, 22654, 19266, 15137, 10426,  5315,

  127.     16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,

  128.     12873, 17855, 16819, 15137, 12873, 10114,  6967,  3552,

  129.     8867, 12299, 11585, 10426,  8867,  6967,  4799,  2446,

  130.     4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247

  131. };

  132. 

  133. uint8_t cropTbl[256 + 2 * MAX_NEG_CROP];

  134. 

  135. int64_t gettime(void)

  136. {

  137.     struct timeval tv;

  138.     gettimeofday(&tv,NULL);

  139.     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;

  140. }

  141. 

  142. #define NB_ITS 20000

  143. #define NB_ITS_SPEED 50000

  144. 

  145. static short idct_mmx_perm[64];

  146. 

  147. static short idct_simple_mmx_perm[64]={

  148.         0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,

  149.         0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,

  150.         0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,

  151.         0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,

  152.         0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,

  153.         0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,

  154.         0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,

  155.         0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,

  156. };

  157. 

  158. static const uint8_t idct_sse2_row_perm[8] = {0, 4, 1, 5, 2, 6, 3, 7};

  159. 

  160. void idct_mmx_init(void)

  161. {

  162.     int i;

  163. 

  164.     /* the mmx/mmxext idct uses a reordered input, so we patch scan tables */

  165.     for (i = 0; i < 64; i++) {

  166.         idct_mmx_perm[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);

  167. //        idct_simple_mmx_perm[i] = simple_block_permute_op(i);

  168.     }

  169. }

  170. 

  171. static DCTELEM block[64] __attribute__ ((aligned (16)));

  172. static DCTELEM block1[64] __attribute__ ((aligned (8)));

  173. static DCTELEM block_org[64] __attribute__ ((aligned (8)));

  174. 

  175. void dct_error(const char *name, int is_idct,

  176.                void (*fdct_func)(DCTELEM *block),

  177.                void (*fdct_ref)(DCTELEM *block), int form, int test)

  178. {

  179.     int it, i, scale;

  180.     int err_inf, v;

  181.     int64_t err2, ti, ti1, it1;

  182.     int64_t sysErr[64], sysErrMax=0;

  183.     int maxout=0;

  184.     int blockSumErrMax=0, blockSumErr;

  185. 

  186.     srandom(0);

  187. 

  188.     err_inf = 0;

  189.     err2 = 0;

  190.     for(i=0; i<64; i++) sysErr[i]=0;

  191.     for(it=0;it<NB_ITS;it++) {

  192.         for(i=0;i<64;i++)

  193.             block1[i] = 0;

  194.         switch(test){

  195.         case 0:

  196.             for(i=0;i<64;i++)

  197.                 block1[i] = (random() % 512) -256;

  198.             if (is_idct){

  199.                 fdct(block1);

  200. 

  201.                 for(i=0;i<64;i++)

  202.                     block1[i]>>=3;

  203.             }

  204.         break;

  205.         case 1:{

  206.             int num= (random()%10)+1;

  207.             for(i=0;i<num;i++)

  208.                 block1[random()%64] = (random() % 512) -256;

  209.         }break;

  210.         case 2:

  211.             block1[0]= (random()%4096)-2048;

  212.             block1[63]= (block1[0]&1)^1;

  213.         break;

  214.         }

  215. 

  216. #if 0 // simulate mismatch control

  217. { int sum=0;

  218.         for(i=0;i<64;i++)

  219.            sum+=block1[i];

  220. 

  221.         if((sum&1)==0) block1[63]^=1;

  222. }

  223. #endif

  224. 

  225.         for(i=0; i<64; i++)

  226.             block_org[i]= block1[i];

  227. 

  228.         if (form == MMX_PERM) {

  229.             for(i=0;i<64;i++)

  230.                 block[idct_mmx_perm[i]] = block1[i];

  231.             } else if (form == MMX_SIMPLE_PERM) {

  232.             for(i=0;i<64;i++)

  233.                 block[idct_simple_mmx_perm[i]] = block1[i];

  234. 

  235.         } else if (form == SSE2_PERM) {

  236.             for(i=0; i<64; i++)

  237.                 block[(i&0x38) | idct_sse2_row_perm[i&7]] = block1[i];

  238.         } else if (form == LIBMPEG2_PERM) {

  239.             for(i=0; i<64; i++)

  240.                 block[(i&0x38) | ((i&6) >> 1) | ((i&1) << 2)] = block1[i];

  241.         } else {

  242.             for(i=0; i<64; i++)

  243.                 block[i]= block1[i];

  244.         }

  245. #if 0 // simulate mismatch control for tested IDCT but not the ref

  246. { int sum=0;

  247.         for(i=0;i<64;i++)

  248.            sum+=block[i];

  249. 

  250.         if((sum&1)==0) block[63]^=1;

  251. }

  252. #endif

  253. 

  254.         fdct_func(block);

  255.         emms_c(); /* for ff_mmx_idct */

  256. 

  257.         if (form == SCALE_PERM) {

  258.             for(i=0; i<64; i++) {

  259.                 scale = 8*(1 << (AANSCALE_BITS + 11)) / aanscales[i];

  260.                 block[i] = (block[i] * scale /*+ (1<<(AANSCALE_BITS-1))*/) >> AANSCALE_BITS;

  261.             }

  262.         }

  263. 

  264.         fdct_ref(block1);

  265. 

  266.         blockSumErr=0;

  267.         for(i=0;i<64;i++) {

  268.             v = abs(block[i] - block1[i]);

  269.             if (v > err_inf)

  270.                 err_inf = v;

  271.             err2 += v * v;

  272.             sysErr[i] += block[i] - block1[i];

  273.             blockSumErr += v;

  274.             if( abs(block[i])>maxout) maxout=abs(block[i]);

  275.         }

  276.         if(blockSumErrMax < blockSumErr) blockSumErrMax= blockSumErr;

  277. #if 0 // print different matrix pairs

  278.         if(blockSumErr){

  279.             printf("\n");

  280.             for(i=0; i<64; i++){

  281.                 if((i&7)==0) printf("\n");

  282.                 printf("%4d ", block_org[i]);

  283.             }

  284.             for(i=0; i<64; i++){

  285.                 if((i&7)==0) printf("\n");

  286.                 printf("%4d ", block[i] - block1[i]);

  287.             }

  288.         }

  289. #endif

  290.     }

  291.     for(i=0; i<64; i++) sysErrMax= FFMAX(sysErrMax, FFABS(sysErr[i]));

  292. 

  293. #if 1 // dump systematic errors

  294.     for(i=0; i<64; i++){

  295.         if(i%8==0) printf("\n");

  296.         printf("%5d ", (int)sysErr[i]);

  297.     }

  298.     printf("\n");

  299. #endif

  300. 

  301.     printf("%s %s: err_inf=%d err2=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",

  302.            is_idct ? "IDCT" : "DCT",

  303.            name, err_inf, (double)err2 / NB_ITS / 64.0, (double)sysErrMax / NB_ITS, maxout, blockSumErrMax);

  304. #if 1 //Speed test

  305.     /* speed test */

  306.     for(i=0;i<64;i++)

  307.         block1[i] = 0;

  308.     switch(test){

  309.     case 0:

  310.         for(i=0;i<64;i++)

  311.             block1[i] = (random() % 512) -256;

  312.         if (is_idct){

  313.             fdct(block1);

  314. 

  315.             for(i=0;i<64;i++)

  316.                 block1[i]>>=3;

  317.         }

  318.     break;

  319.     case 1:{

  320.     case 2:

  321.         block1[0] = (random() % 512) -256;

  322.         block1[1] = (random() % 512) -256;

  323.         block1[2] = (random() % 512) -256;

  324.         block1[3] = (random() % 512) -256;

  325.     }break;

  326.     }

  327. 

  328.     if (form == MMX_PERM) {

  329.         for(i=0;i<64;i++)

  330.             block[idct_mmx_perm[i]] = block1[i];

  331.     } else if(form == MMX_SIMPLE_PERM) {

  332.         for(i=0;i<64;i++)

  333.             block[idct_simple_mmx_perm[i]] = block1[i];

  334.     } else {

  335.         for(i=0; i<64; i++)

  336.             block[i]= block1[i];

  337.     }

  338. 

  339.     ti = gettime();

  340.     it1 = 0;

  341.     do {

  342.         for(it=0;it<NB_ITS_SPEED;it++) {

  343.             for(i=0; i<64; i++)

  344.                 block[i]= block1[i];

  345. //            memcpy(block, block1, sizeof(DCTELEM) * 64);

  346. // do not memcpy especially not fastmemcpy because it does movntq !!!

  347.             fdct_func(block);

  348.         }

  349.         it1 += NB_ITS_SPEED;

  350.         ti1 = gettime() - ti;

  351.     } while (ti1 < 1000000);

  352.     emms_c();

  353. 

  354.     printf("%s %s: %0.1f kdct/s\n",

  355.            is_idct ? "IDCT" : "DCT",

  356.            name, (double)it1 * 1000.0 / (double)ti1);

  357. #endif

  358. }

  359. 

  360. static uint8_t img_dest[64] __attribute__ ((aligned (8)));

  361. static uint8_t img_dest1[64] __attribute__ ((aligned (8)));

  362. 

  363. void idct248_ref(uint8_t *dest, int linesize, int16_t *block)

  364. {

  365.     static int init;

  366.     static double c8[8][8];

  367.     static double c4[4][4];

  368.     double block1[64], block2[64], block3[64];

  369.     double s, sum, v;

  370.     int i, j, k;

  371. 

  372.     if (!init) {

  373.         init = 1;

  374. 

  375.         for(i=0;i<8;i++) {

  376.             sum = 0;

  377.             for(j=0;j<8;j++) {

  378.                 s = (i==0) ? sqrt(1.0/8.0) : sqrt(1.0/4.0);

  379.                 c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);

  380.                 sum += c8[i][j] * c8[i][j];

  381.             }

  382.         }

  383. 

  384.         for(i=0;i<4;i++) {

  385.             sum = 0;

  386.             for(j=0;j<4;j++) {

  387.                 s = (i==0) ? sqrt(1.0/4.0) : sqrt(1.0/2.0);

  388.                 c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);

  389.                 sum += c4[i][j] * c4[i][j];

  390.             }

  391.         }

  392.     }

  393. 

  394.     /* butterfly */

  395.     s = 0.5 * sqrt(2.0);

  396.     for(i=0;i<4;i++) {

  397.         for(j=0;j<8;j++) {

  398.             block1[8*(2*i)+j] = (block[8*(2*i)+j] + block[8*(2*i+1)+j]) * s;

  399.             block1[8*(2*i+1)+j] = (block[8*(2*i)+j] - block[8*(2*i+1)+j]) * s;

  400.         }

  401.     }

  402. 

  403.     /* idct8 on lines */

  404.     for(i=0;i<8;i++) {

  405.         for(j=0;j<8;j++) {

  406.             sum = 0;

  407.             for(k=0;k<8;k++)

  408.                 sum += c8[k][j] * block1[8*i+k];

  409.             block2[8*i+j] = sum;

  410.         }

  411.     }

  412. 

  413.     /* idct4 */

  414.     for(i=0;i<8;i++) {

  415.         for(j=0;j<4;j++) {

  416.             /* top */

  417.             sum = 0;

  418.             for(k=0;k<4;k++)

  419.                 sum += c4[k][j] * block2[8*(2*k)+i];

  420.             block3[8*(2*j)+i] = sum;

  421. 

  422.             /* bottom */

  423.             sum = 0;

  424.             for(k=0;k<4;k++)

  425.                 sum += c4[k][j] * block2[8*(2*k+1)+i];

  426.             block3[8*(2*j+1)+i] = sum;

  427.         }

  428.     }

  429. 

  430.     /* clamp and store the result */

  431.     for(i=0;i<8;i++) {

  432.         for(j=0;j<8;j++) {

  433.             v = block3[8*i+j];

  434.             if (v < 0)

  435.                 v = 0;

  436.             else if (v > 255)

  437.                 v = 255;

  438.             dest[i * linesize + j] = (int)rint(v);

  439.         }

  440.     }

  441. }

  442. 

  443. void idct248_error(const char *name,

  444.                     void (*idct248_put)(uint8_t *dest, int line_size, int16_t *block))

  445. {

  446.     int it, i, it1, ti, ti1, err_max, v;

  447. 

  448.     srandom(0);

  449. 

  450.     /* just one test to see if code is correct (precision is less

  451.        important here) */

  452.     err_max = 0;

  453.     for(it=0;it<NB_ITS;it++) {

  454. 

  455.         /* XXX: use forward transform to generate values */

  456.         for(i=0;i<64;i++)

  457.             block1[i] = (random() % 256) - 128;

  458.         block1[0] += 1024;

  459. 

  460.         for(i=0; i<64; i++)

  461.             block[i]= block1[i];

  462.         idct248_ref(img_dest1, 8, block);

  463. 

  464.         for(i=0; i<64; i++)

  465.             block[i]= block1[i];

  466.         idct248_put(img_dest, 8, block);

  467. 

  468.         for(i=0;i<64;i++) {

  469.             v = abs((int)img_dest[i] - (int)img_dest1[i]);

  470.             if (v == 255)

  471.                 printf("%d %d\n", img_dest[i], img_dest1[i]);

  472.             if (v > err_max)

  473.                 err_max = v;

  474.         }

  475. #if 0

  476.         printf("ref=\n");

  477.         for(i=0;i<8;i++) {

  478.             int j;

  479.             for(j=0;j<8;j++) {

  480.                 printf(" %3d", img_dest1[i*8+j]);

  481.             }

  482.             printf("\n");

  483.         }

  484. 

  485.         printf("out=\n");

  486.         for(i=0;i<8;i++) {

  487.             int j;

  488.             for(j=0;j<8;j++) {

  489.                 printf(" %3d", img_dest[i*8+j]);

  490.             }

  491.             printf("\n");

  492.         }

  493. #endif

  494.     }

  495.     printf("%s %s: err_inf=%d\n",

  496.            1 ? "IDCT248" : "DCT248",

  497.            name, err_max);

  498. 

  499.     ti = gettime();

  500.     it1 = 0;

  501.     do {

  502.         for(it=0;it<NB_ITS_SPEED;it++) {

  503.             for(i=0; i<64; i++)

  504.                 block[i]= block1[i];

  505. //            memcpy(block, block1, sizeof(DCTELEM) * 64);

  506. // do not memcpy especially not fastmemcpy because it does movntq !!!

  507.             idct248_put(img_dest, 8, block);

  508.         }

  509.         it1 += NB_ITS_SPEED;

  510.         ti1 = gettime() - ti;

  511.     } while (ti1 < 1000000);

  512.     emms_c();

  513. 

  514.     printf("%s %s: %0.1f kdct/s\n",

  515.            1 ? "IDCT248" : "DCT248",

  516.            name, (double)it1 * 1000.0 / (double)ti1);

  517. }

  518. 

  519. void help(void)

  520. {

  521.     printf("dct-test [-i] [<test-number>]\n"

  522.            "test-number 0 -> test with random matrixes\n"

  523.            "            1 -> test with random sparse matrixes\n"

  524.            "            2 -> do 3. test from mpeg4 std\n"

  525.            "-i          test IDCT implementations\n"

  526.            "-4          test IDCT248 implementations\n");

  527. }

  528. 

  529. int main(int argc, char **argv)

  530. {

  531.     int test_idct = 0, test_248_dct = 0;

  532.     int c,i;

  533.     int test=1;

  534.     int cpu_flags = mm_support();

  535. 

  536.     init_fdct();

  537.     idct_mmx_init();

  538. 

  539.     for(i=0;i<256;i++) cropTbl[i + MAX_NEG_CROP] = i;

  540.     for(i=0;i<MAX_NEG_CROP;i++) {

  541.         cropTbl[i] = 0;

  542.         cropTbl[i + MAX_NEG_CROP + 256] = 255;

  543.     }

  544. 

  545.     for(;;) {

  546.         c = getopt(argc, argv, "ih4");

  547.         if (c == -1)

  548.             break;

  549.         switch(c) {

  550.         case 'i':

  551.             test_idct = 1;

  552.             break;

  553.         case '4':

  554.             test_248_dct = 1;

  555.             break;

  556.         default :

  557.         case 'h':

  558.             help();

  559.             return 0;

  560.         }

  561.     }

  562. 

  563.     if(optind <argc) test= atoi(argv[optind]);

  564. 

  565.     printf("ffmpeg DCT/IDCT test\n");

  566. 

  567.     if (test_248_dct) {

  568.         idct248_error("SIMPLE-C", ff_simple_idct248_put);

  569.     } else {

  570.       for (i=0;algos[i].name;i++)

  571.         if (algos[i].is_idct == test_idct && !(~cpu_flags & algos[i].mm_support)) {

  572.           dct_error (algos[i].name, algos[i].is_idct, algos[i].func, algos[i].ref, algos[i].format, test);

  573.         }

  574.     }

  575.     return 0;

  576. }