extern/ffmpeg/libavcodec/dct-test.c

   1 /**
   2  * @file dct-test.c
   3  * DCT test. (c) 2001 Fabrice Bellard.
   4  * Started from sample code by Juan J. Sierralta P.
   5  */
   6
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <sys/time.h>
  11 #include <unistd.h>
  12
  13 #include "dsputil.h"
  14
  15 #include "i386/mmx.h"
  16 #include "simple_idct.h"
  17 #include "faandct.h"
  18
  19 #ifndef MAX
  20 #define MAX(a, b)  (((a) > (b)) ? (a) : (b))
  21 #endif
  22
  23 #undef printf
  24
  25 void *fast_memcpy(void *a, const void *b, size_t c){return memcpy(a,b,c);};
  26
  27 /* reference fdct/idct */
  28 extern void fdct(DCTELEM *block);
  29 extern void idct(DCTELEM *block);
  30 extern void ff_idct_xvid_mmx(DCTELEM *block);
  31 extern void ff_idct_xvid_mmx2(DCTELEM *block);
  32 extern void init_fdct();
  33
  34 extern void j_rev_dct(DCTELEM *data);
  35 extern void ff_mmx_idct(DCTELEM *data);
  36 extern void ff_mmxext_idct(DCTELEM *data);
  37
  38 extern void odivx_idct_c (short *block);
  39
  40 #define AANSCALE_BITS 12
  41 static const unsigned short aanscales[64] = {
  42     /* precomputed values scaled up by 14 bits */
  43     16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
  44     22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,
  45     21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,
  46     19266, 26722, 25172, 22654, 19266, 15137, 10426,  5315,
  47     16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
  48     12873, 17855, 16819, 15137, 12873, 10114,  6967,  3552,
  49     8867, 12299, 11585, 10426,  8867,  6967,  4799,  2446,
  50     4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247
  51 };
  52
  53 uint8_t cropTbl[256 + 2 * MAX_NEG_CROP];
  54
  55 int64_t gettime(void)
  56 {
  57     struct timeval tv;
  58     gettimeofday(&tv,NULL);
  59     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
  60 }
  61
  62 #define NB_ITS 20000
  63 #define NB_ITS_SPEED 50000
  64
  65 static short idct_mmx_perm[64];
  66
  67 static short idct_simple_mmx_perm[64]={
  68         0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
  69         0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
  70         0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
  71         0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
  72         0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
  73         0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
  74         0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
  75         0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
  76 };
  77
  78 void idct_mmx_init(void)
  79 {
  80     int i;
  81
  82     /* the mmx/mmxext idct uses a reordered input, so we patch scan tables */
  83     for (i = 0; i < 64; i++) {
  84         idct_mmx_perm[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
  85 //        idct_simple_mmx_perm[i] = simple_block_permute_op(i);
  86     }
  87 }
  88
  89 static DCTELEM block[64] __attribute__ ((aligned (8)));
  90 static DCTELEM block1[64] __attribute__ ((aligned (8)));
  91 static DCTELEM block_org[64] __attribute__ ((aligned (8)));
  92
  93 void dct_error(const char *name, int is_idct,
  94                void (*fdct_func)(DCTELEM *block),
  95                void (*fdct_ref)(DCTELEM *block), int test)
  96 {
  97     int it, i, scale;
  98     int err_inf, v;
  99     int64_t err2, ti, ti1, it1;
 100     int64_t sysErr[64], sysErrMax=0;
 101     int maxout=0;
 102     int blockSumErrMax=0, blockSumErr;
 103
 104     srandom(0);
 105
 106     err_inf = 0;
 107     err2 = 0;
 108     for(i=0; i<64; i++) sysErr[i]=0;
 109     for(it=0;it<NB_ITS;it++) {
 110         for(i=0;i<64;i++)
 111             block1[i] = 0;
 112         switch(test){
 113         case 0:
 114             for(i=0;i<64;i++)
 115                 block1[i] = (random() % 512) -256;
 116             if (is_idct){
 117                 fdct(block1);
 118
 119                 for(i=0;i<64;i++)
 120                     block1[i]>>=3;
 121             }
 122         break;
 123         case 1:{
 124             int num= (random()%10)+1;
 125             for(i=0;i<num;i++)
 126                 block1[random()%64] = (random() % 512) -256;
 127         }break;
 128         case 2:
 129             block1[0]= (random()%4096)-2048;
 130             block1[63]= (block1[0]&1)^1;
 131         break;
 132         }
 133
 134 #if 0 // simulate mismatch control
 135 { int sum=0;
 136         for(i=0;i<64;i++)
 137            sum+=block1[i];
 138
 139         if((sum&1)==0) block1[63]^=1;
 140 }
 141 #endif
 142
 143         for(i=0; i<64; i++)
 144             block_org[i]= block1[i];
 145
 146         if (fdct_func == ff_mmx_idct ||
 147             fdct_func == j_rev_dct || fdct_func == ff_mmxext_idct) {
 148             for(i=0;i<64;i++)
 149                 block[idct_mmx_perm[i]] = block1[i];
 150         } else if(fdct_func == ff_simple_idct_mmx ) {
 151             for(i=0;i<64;i++)
 152                 block[idct_simple_mmx_perm[i]] = block1[i];
 153
 154         } else {
 155             for(i=0; i<64; i++)
 156                 block[i]= block1[i];
 157         }
 158 #if 0 // simulate mismatch control for tested IDCT but not the ref
 159 { int sum=0;
 160         for(i=0;i<64;i++)
 161            sum+=block[i];
 162
 163         if((sum&1)==0) block[63]^=1;
 164 }
 165 #endif
 166
 167         fdct_func(block);
 168         emms(); /* for ff_mmx_idct */
 169
 170         if (fdct_func == fdct_ifast
 171 #ifndef FAAN_POSTSCALE
 172             || fdct_func == ff_faandct
 173 #endif
 174             ) {
 175             for(i=0; i<64; i++) {
 176                 scale = 8*(1 << (AANSCALE_BITS + 11)) / aanscales[i];
 177                 block[i] = (block[i] * scale /*+ (1<<(AANSCALE_BITS-1))*/) >> AANSCALE_BITS;
 178             }
 179         }
 180
 181         fdct_ref(block1);
 182
 183         blockSumErr=0;
 184         for(i=0;i<64;i++) {
 185             v = abs(block[i] - block1[i]);
 186             if (v > err_inf)
 187                 err_inf = v;
 188             err2 += v * v;
 189             sysErr[i] += block[i] - block1[i];
 190             blockSumErr += v;
 191             if( abs(block[i])>maxout) maxout=abs(block[i]);
 192         }
 193         if(blockSumErrMax < blockSumErr) blockSumErrMax= blockSumErr;
 194 #if 0 // print different matrix pairs
 195         if(blockSumErr){
 196             printf("\n");
 197             for(i=0; i<64; i++){
 198                 if((i&7)==0) printf("\n");
 199                 printf("%4d ", block_org[i]);
 200             }
 201             for(i=0; i<64; i++){
 202                 if((i&7)==0) printf("\n");
 203                 printf("%4d ", block[i] - block1[i]);
 204             }
 205         }
 206 #endif
 207     }
 208     for(i=0; i<64; i++) sysErrMax= MAX(sysErrMax, ABS(sysErr[i]));
 209
 210 #if 1 // dump systematic errors
 211     for(i=0; i<64; i++){
 212         if(i%8==0) printf("\n");
 213         printf("%5d ", (int)sysErr[i]);
 214     }
 215     printf("\n");
 216 #endif
 217
 218     printf("%s %s: err_inf=%d err2=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
 219            is_idct ? "IDCT" : "DCT",
 220            name, err_inf, (double)err2 / NB_ITS / 64.0, (double)sysErrMax / NB_ITS, maxout, blockSumErrMax);
 221 #if 1 //Speed test
 222     /* speed test */
 223     for(i=0;i<64;i++)
 224         block1[i] = 0;
 225     switch(test){
 226     case 0:
 227         for(i=0;i<64;i++)
 228             block1[i] = (random() % 512) -256;
 229         if (is_idct){
 230             fdct(block1);
 231
 232             for(i=0;i<64;i++)
 233                 block1[i]>>=3;
 234         }
 235     break;
 236     case 1:{
 237     case 2:
 238         block1[0] = (random() % 512) -256;
 239         block1[1] = (random() % 512) -256;
 240         block1[2] = (random() % 512) -256;
 241         block1[3] = (random() % 512) -256;
 242     }break;
 243     }
 244
 245     if (fdct_func == ff_mmx_idct ||
 246         fdct_func == j_rev_dct || fdct_func == ff_mmxext_idct) {
 247         for(i=0;i<64;i++)
 248             block[idct_mmx_perm[i]] = block1[i];
 249     } else if(fdct_func == ff_simple_idct_mmx ) {
 250         for(i=0;i<64;i++)
 251             block[idct_simple_mmx_perm[i]] = block1[i];
 252     } else {
 253         for(i=0; i<64; i++)
 254             block[i]= block1[i];
 255     }
 256
 257     ti = gettime();
 258     it1 = 0;
 259     do {
 260         for(it=0;it<NB_ITS_SPEED;it++) {
 261             for(i=0; i<64; i++)
 262                 block[i]= block1[i];
 263 //            memcpy(block, block1, sizeof(DCTELEM) * 64);
 264 // dont memcpy especially not fastmemcpy because it does movntq !!!
 265             fdct_func(block);
 266         }
 267         it1 += NB_ITS_SPEED;
 268         ti1 = gettime() - ti;
 269     } while (ti1 < 1000000);
 270     emms();
 271
 272     printf("%s %s: %0.1f kdct/s\n",
 273            is_idct ? "IDCT" : "DCT",
 274            name, (double)it1 * 1000.0 / (double)ti1);
 275 #endif
 276 }
 277
 278 static uint8_t img_dest[64] __attribute__ ((aligned (8)));
 279 static uint8_t img_dest1[64] __attribute__ ((aligned (8)));
 280
 281 void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
 282 {
 283     static int init;
 284     static double c8[8][8];
 285     static double c4[4][4];
 286     double block1[64], block2[64], block3[64];
 287     double s, sum, v;
 288     int i, j, k;
 289
 290     if (!init) {
 291         init = 1;
 292
 293         for(i=0;i<8;i++) {
 294             sum = 0;
 295             for(j=0;j<8;j++) {
 296                 s = (i==0) ? sqrt(1.0/8.0) : sqrt(1.0/4.0);
 297                 c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
 298                 sum += c8[i][j] * c8[i][j];
 299             }
 300         }
 301
 302         for(i=0;i<4;i++) {
 303             sum = 0;
 304             for(j=0;j<4;j++) {
 305                 s = (i==0) ? sqrt(1.0/4.0) : sqrt(1.0/2.0);
 306                 c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
 307                 sum += c4[i][j] * c4[i][j];
 308             }
 309         }
 310     }
 311
 312     /* butterfly */
 313     s = 0.5 * sqrt(2.0);
 314     for(i=0;i<4;i++) {
 315         for(j=0;j<8;j++) {
 316             block1[8*(2*i)+j] = (block[8*(2*i)+j] + block[8*(2*i+1)+j]) * s;
 317             block1[8*(2*i+1)+j] = (block[8*(2*i)+j] - block[8*(2*i+1)+j]) * s;
 318         }
 319     }
 320
 321     /* idct8 on lines */
 322     for(i=0;i<8;i++) {
 323         for(j=0;j<8;j++) {
 324             sum = 0;
 325             for(k=0;k<8;k++)
 326                 sum += c8[k][j] * block1[8*i+k];
 327             block2[8*i+j] = sum;
 328         }
 329     }
 330
 331     /* idct4 */
 332     for(i=0;i<8;i++) {
 333         for(j=0;j<4;j++) {
 334             /* top */
 335             sum = 0;
 336             for(k=0;k<4;k++)
 337                 sum += c4[k][j] * block2[8*(2*k)+i];
 338             block3[8*(2*j)+i] = sum;
 339
 340             /* bottom */
 341             sum = 0;
 342             for(k=0;k<4;k++)
 343                 sum += c4[k][j] * block2[8*(2*k+1)+i];
 344             block3[8*(2*j+1)+i] = sum;
 345         }
 346     }
 347
 348     /* clamp and store the result */
 349     for(i=0;i<8;i++) {
 350         for(j=0;j<8;j++) {
 351             v = block3[8*i+j];
 352             if (v < 0)
 353                 v = 0;
 354             else if (v > 255)
 355                 v = 255;
 356             dest[i * linesize + j] = (int)rint(v);
 357         }
 358     }
 359 }
 360
 361 void idct248_error(const char *name,
 362                     void (*idct248_put)(uint8_t *dest, int line_size, int16_t *block))
 363 {
 364     int it, i, it1, ti, ti1, err_max, v;
 365
 366     srandom(0);
 367
 368     /* just one test to see if code is correct (precision is less
 369        important here) */
 370     err_max = 0;
 371     for(it=0;it<NB_ITS;it++) {
 372
 373         /* XXX: use forward transform to generate values */
 374         for(i=0;i<64;i++)
 375             block1[i] = (random() % 256) - 128;
 376         block1[0] += 1024;
 377
 378         for(i=0; i<64; i++)
 379             block[i]= block1[i];
 380         idct248_ref(img_dest1, 8, block);
 381
 382         for(i=0; i<64; i++)
 383             block[i]= block1[i];
 384         idct248_put(img_dest, 8, block);
 385
 386         for(i=0;i<64;i++) {
 387             v = abs((int)img_dest[i] - (int)img_dest1[i]);
 388             if (v == 255)
 389                 printf("%d %d\n", img_dest[i], img_dest1[i]);
 390             if (v > err_max)
 391                 err_max = v;
 392         }
 393 #if 0
 394         printf("ref=\n");
 395         for(i=0;i<8;i++) {
 396             int j;
 397             for(j=0;j<8;j++) {
 398                 printf(" %3d", img_dest1[i*8+j]);
 399             }
 400             printf("\n");
 401         }
 402
 403         printf("out=\n");
 404         for(i=0;i<8;i++) {
 405             int j;
 406             for(j=0;j<8;j++) {
 407                 printf(" %3d", img_dest[i*8+j]);
 408             }
 409             printf("\n");
 410         }
 411 #endif
 412     }
 413     printf("%s %s: err_inf=%d\n",
 414            1 ? "IDCT248" : "DCT248",
 415            name, err_max);
 416
 417     ti = gettime();
 418     it1 = 0;
 419     do {
 420         for(it=0;it<NB_ITS_SPEED;it++) {
 421             for(i=0; i<64; i++)
 422                 block[i]= block1[i];
 423 //            memcpy(block, block1, sizeof(DCTELEM) * 64);
 424 // dont memcpy especially not fastmemcpy because it does movntq !!!
 425             idct248_put(img_dest, 8, block);
 426         }
 427         it1 += NB_ITS_SPEED;
 428         ti1 = gettime() - ti;
 429     } while (ti1 < 1000000);
 430     emms();
 431
 432     printf("%s %s: %0.1f kdct/s\n",
 433            1 ? "IDCT248" : "DCT248",
 434            name, (double)it1 * 1000.0 / (double)ti1);
 435 }
 436
 437 void help(void)
 438 {
 439     printf("dct-test [-i] [<test-number>]\n"
 440            "test-number 0 -> test with random matrixes\n"
 441            "            1 -> test with random sparse matrixes\n"
 442            "            2 -> do 3. test from mpeg4 std\n"
 443            "-i          test IDCT implementations\n"
 444            "-4          test IDCT248 implementations\n");
 445     exit(1);
 446 }
 447
 448 int main(int argc, char **argv)
 449 {
 450     int test_idct = 0, test_248_dct = 0;
 451     int c,i;
 452     int test=1;
 453
 454     init_fdct();
 455     idct_mmx_init();
 456
 457     for(i=0;i<256;i++) cropTbl[i + MAX_NEG_CROP] = i;
 458     for(i=0;i<MAX_NEG_CROP;i++) {
 459         cropTbl[i] = 0;
 460         cropTbl[i + MAX_NEG_CROP + 256] = 255;
 461     }
 462
 463     for(;;) {
 464         c = getopt(argc, argv, "ih4");
 465         if (c == -1)
 466             break;
 467         switch(c) {
 468         case 'i':
 469             test_idct = 1;
 470             break;
 471         case '4':
 472             test_248_dct = 1;
 473             break;
 474         default :
 475         case 'h':
 476             help();
 477             break;
 478         }
 479     }
 480
 481     if(optind <argc) test= atoi(argv[optind]);
 482
 483     printf("ffmpeg DCT/IDCT test\n");
 484
 485     if (test_248_dct) {
 486         idct248_error("SIMPLE-C", simple_idct248_put);
 487     } else {
 488         if (!test_idct) {
 489             dct_error("REF-DBL", 0, fdct, fdct, test); /* only to verify code ! */
 490             dct_error("IJG-AAN-INT", 0, fdct_ifast, fdct, test);
 491             dct_error("IJG-LLM-INT", 0, ff_jpeg_fdct_islow, fdct, test);
 492             dct_error("MMX", 0, ff_fdct_mmx, fdct, test);
 493             dct_error("MMX2", 0, ff_fdct_mmx2, fdct, test);
 494             dct_error("FAAN", 0, ff_faandct, fdct, test);
 495         } else {
 496             dct_error("REF-DBL", 1, idct, idct, test);
 497             dct_error("INT", 1, j_rev_dct, idct, test);
 498             dct_error("LIBMPEG2-MMX", 1, ff_mmx_idct, idct, test);
 499             dct_error("LIBMPEG2-MMXEXT", 1, ff_mmxext_idct, idct, test);
 500             dct_error("SIMPLE-C", 1, simple_idct, idct, test);
 501             dct_error("SIMPLE-MMX", 1, ff_simple_idct_mmx, idct, test);
 502             dct_error("XVID-MMX", 1, ff_idct_xvid_mmx, idct, test);
 503             dct_error("XVID-MMX2", 1, ff_idct_xvid_mmx2, idct, test);
 504             //        dct_error("ODIVX-C", 1, odivx_idct_c, idct);
 505             //printf(" test against odivx idct\n");
 506             //        dct_error("REF", 1, idct, odivx_idct_c);
 507             //        dct_error("INT", 1, j_rev_dct, odivx_idct_c);
 508             //        dct_error("MMX", 1, ff_mmx_idct, odivx_idct_c);
 509             //        dct_error("MMXEXT", 1, ff_mmxext_idct, odivx_idct_c);
 510             //        dct_error("SIMPLE-C", 1, simple_idct, odivx_idct_c);
 511             //        dct_error("SIMPLE-MMX", 1, ff_simple_idct_mmx, odivx_idct_c);
 512             //        dct_error("ODIVX-C", 1, odivx_idct_c, odivx_idct_c);
 513         }
 514     }
 515     return 0;
 516 }