malloc padding to avoid reading past the malloc()ed area.
[libav.git] / libavcodec / dct-test.c
CommitLineData
983e3246
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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
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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
9e1586fc 15#include "i386/mmx.h"
86748dbc 16#include "simple_idct.h"
65e4c8c9 17#include "faandct.h"
9e1586fc 18
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19#ifndef MAX
20#define MAX(a, b) (((a) > (b)) ? (a) : (b))
21#endif
22
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23#undef printf
24
25void *fast_memcpy(void *a, const void *b, size_t c){return memcpy(a,b,c);};
26
9e1586fc 27/* reference fdct/idct */
de6d9b64 28extern void fdct(DCTELEM *block);
9e1586fc 29extern void idct(DCTELEM *block);
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30extern void ff_idct_xvid_mmx(DCTELEM *block);
31extern void ff_idct_xvid_mmx2(DCTELEM *block);
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32extern void init_fdct();
33
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34extern void j_rev_dct(DCTELEM *data);
35extern void ff_mmx_idct(DCTELEM *data);
36extern void ff_mmxext_idct(DCTELEM *data);
37
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38extern void odivx_idct_c (short *block);
39
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40#define AANSCALE_BITS 12
41static 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
0c1a9eda 53uint8_t cropTbl[256 + 2 * MAX_NEG_CROP];
86748dbc 54
0c1a9eda 55int64_t gettime(void)
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56{
57 struct timeval tv;
58 gettimeofday(&tv,NULL);
0c1a9eda 59 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
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60}
61
62#define NB_ITS 20000
63#define NB_ITS_SPEED 50000
64
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65static short idct_mmx_perm[64];
66
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67static 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
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78void 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);
86748dbc 85// idct_simple_mmx_perm[i] = simple_block_permute_op(i);
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86 }
87}
88
89static DCTELEM block[64] __attribute__ ((aligned (8)));
90static DCTELEM block1[64] __attribute__ ((aligned (8)));
86748dbc 91static DCTELEM block_org[64] __attribute__ ((aligned (8)));
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92
93void dct_error(const char *name, int is_idct,
94 void (*fdct_func)(DCTELEM *block),
86748dbc 95 void (*fdct_ref)(DCTELEM *block), int test)
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96{
97 int it, i, scale;
de6d9b64 98 int err_inf, v;
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99 int64_t err2, ti, ti1, it1;
100 int64_t sysErr[64], sysErrMax=0;
86748dbc 101 int maxout=0;
86748dbc 102 int blockSumErrMax=0, blockSumErr;
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103
104 srandom(0);
105
106 err_inf = 0;
107 err2 = 0;
86748dbc 108 for(i=0; i<64; i++) sysErr[i]=0;
de6d9b64 109 for(it=0;it<NB_ITS;it++) {
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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;
ad324c93 116 if (is_idct){
86748dbc 117 fdct(block1);
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118
119 for(i=0;i<64;i++)
120 block1[i]>>=3;
121 }
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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 }
9e1586fc 133
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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];
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145
146 if (fdct_func == ff_mmx_idct ||
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147 fdct_func == j_rev_dct || fdct_func == ff_mmxext_idct) {
148 for(i=0;i<64;i++)
9e1586fc 149 block[idct_mmx_perm[i]] = block1[i];
a46a3ce4 150 } else if(fdct_func == ff_simple_idct_mmx ) {
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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];
9e1586fc 157 }
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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
9e1586fc 166
de6d9b64 167 fdct_func(block);
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168 emms(); /* for ff_mmx_idct */
169
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170 if (fdct_func == fdct_ifast
171#ifndef FAAN_POSTSCALE
172 || fdct_func == ff_faandct
173#endif
174 ) {
de6d9b64 175 for(i=0; i<64; i++) {
ad324c93 176 scale = 8*(1 << (AANSCALE_BITS + 11)) / aanscales[i];
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177 block[i] = (block[i] * scale /*+ (1<<(AANSCALE_BITS-1))*/) >> AANSCALE_BITS;
178 }
179 }
180
9e1586fc 181 fdct_ref(block1);
de6d9b64 182
86748dbc 183 blockSumErr=0;
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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;
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189 sysErr[i] += block[i] - block1[i];
190 blockSumErr += v;
191 if( abs(block[i])>maxout) maxout=abs(block[i]);
de6d9b64 192 }
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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]);
de6d9b64 214 }
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215 printf("\n");
216#endif
217
218 printf("%s %s: err_inf=%d err2=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
9e1586fc 219 is_idct ? "IDCT" : "DCT",
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220 name, err_inf, (double)err2 / NB_ITS / 64.0, (double)sysErrMax / NB_ITS, maxout, blockSumErrMax);
221#if 1 //Speed test
de6d9b64 222 /* speed test */
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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;
ad324c93 229 if (is_idct){
86748dbc 230 fdct(block1);
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231
232 for(i=0;i<64;i++)
233 block1[i]>>=3;
234 }
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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 }
de6d9b64 244
9e1586fc 245 if (fdct_func == ff_mmx_idct ||
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246 fdct_func == j_rev_dct || fdct_func == ff_mmxext_idct) {
247 for(i=0;i<64;i++)
9e1586fc 248 block[idct_mmx_perm[i]] = block1[i];
a46a3ce4 249 } else if(fdct_func == ff_simple_idct_mmx ) {
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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];
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FB
255 }
256
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257 ti = gettime();
258 it1 = 0;
259 do {
260 for(it=0;it<NB_ITS_SPEED;it++) {
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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 !!!
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265 fdct_func(block);
266 }
267 it1 += NB_ITS_SPEED;
268 ti1 = gettime() - ti;
269 } while (ti1 < 1000000);
9e1586fc 270 emms();
de6d9b64 271
86748dbc 272 printf("%s %s: %0.1f kdct/s\n",
9e1586fc 273 is_idct ? "IDCT" : "DCT",
de6d9b64 274 name, (double)it1 * 1000.0 / (double)ti1);
86748dbc 275#endif
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FB
276}
277
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278static uint8_t img_dest[64] __attribute__ ((aligned (8)));
279static uint8_t img_dest1[64] __attribute__ ((aligned (8)));
a46a3ce4 280
0c1a9eda 281void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
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FB
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 */
652f0197 313 s = 0.5 * sqrt(2.0);
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314 for(i=0;i<4;i++) {
315 for(j=0;j<8;j++) {
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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;
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FB
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++) {
652f0197 351 v = block3[8*i+j];
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FB
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
361void idct248_error(const char *name,
0c1a9eda 362 void (*idct248_put)(uint8_t *dest, int line_size, int16_t *block))
a46a3ce4
FB
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++) {
a46a3ce4 372
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FB
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
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FB
378 for(i=0; i<64; i++)
379 block[i]= block1[i];
380 idct248_ref(img_dest1, 8, block);
381
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FB
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 }
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FB
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 }
a46a3ce4 402
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FB
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
a46a3ce4
FB
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
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437void help(void)
438{
86748dbc
MN
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"
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443 "-i test IDCT implementations\n"
444 "-4 test IDCT248 implementations\n");
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445 exit(1);
446}
447
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448int main(int argc, char **argv)
449{
a46a3ce4 450 int test_idct = 0, test_248_dct = 0;
86748dbc
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451 int c,i;
452 int test=1;
9e1586fc 453
de6d9b64 454 init_fdct();
9e1586fc 455 idct_mmx_init();
de6d9b64 456
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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
9e1586fc 463 for(;;) {
a46a3ce4 464 c = getopt(argc, argv, "ih4");
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465 if (c == -1)
466 break;
467 switch(c) {
468 case 'i':
469 test_idct = 1;
470 break;
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471 case '4':
472 test_248_dct = 1;
473 break;
86748dbc 474 default :
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475 case 'h':
476 help();
477 break;
478 }
479 }
86748dbc
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480
481 if(optind <argc) test= atoi(argv[optind]);
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482
483 printf("ffmpeg DCT/IDCT test\n");
484
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485 if (test_248_dct) {
486 idct248_error("SIMPLE-C", simple_idct248_put);
9e1586fc 487 } else {
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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);
94789b9e 493 dct_error("MMX2", 0, ff_fdct_mmx2, fdct, test);
65e4c8c9 494 dct_error("FAAN", 0, ff_faandct, fdct, test);
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FB
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);
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502 dct_error("XVID-MMX", 1, ff_idct_xvid_mmx, idct, test);
503 dct_error("XVID-MMX2", 1, ff_idct_xvid_mmx2, idct, test);
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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 }
9e1586fc 514 }
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FB
515 return 0;
516}