2 * (c) 2001 Fabrice Bellard
3 * 2007 Marc Hoffman <marc.hoffman@analog.com>
5 * This file is part of FFmpeg.
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.
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.
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
24 * DCT test (c) 2001 Fabrice Bellard
25 * Started from sample code by Juan J. Sierralta P.
35 #include "libavutil/cpu.h"
36 #include "libavutil/common.h"
37 #include "libavutil/lfg.h"
39 #include "simple_idct.h"
40 #include "aandcttab.h"
43 #include "x86/idct_xvid.h"
48 void ff_mmx_idct(DCTELEM *data);
49 void ff_mmxext_idct(DCTELEM *data);
51 void odivx_idct_c(short *block);
54 void ff_bfin_idct(DCTELEM *block);
55 void ff_bfin_fdct(DCTELEM *block);
58 void fdct_altivec(DCTELEM *block);
59 //void idct_altivec(DCTELEM *block);?? no routine
62 void ff_j_rev_dct_arm(DCTELEM *data);
63 void ff_simple_idct_arm(DCTELEM *data);
64 void ff_simple_idct_armv5te(DCTELEM *data);
65 void ff_simple_idct_armv6(DCTELEM *data);
66 void ff_simple_idct_neon(DCTELEM *data);
68 void ff_simple_idct_axp(DCTELEM *data);
72 enum { FDCT, IDCT } is_idct;
73 void (* func) (DCTELEM *block);
74 void (* ref) (DCTELEM *block);
75 enum formattag { NO_PERM,MMX_PERM, MMX_SIMPLE_PERM, SCALE_PERM, SSE2_PERM, PARTTRANS_PERM } format;
79 #ifndef FAAN_POSTSCALE
80 #define FAAN_SCALE SCALE_PERM
82 #define FAAN_SCALE NO_PERM
87 struct algo algos[] = {
88 {"REF-DBL", 0, ff_ref_fdct, ff_ref_fdct, NO_PERM},
89 {"FAAN", 0, ff_faandct, ff_ref_fdct, FAAN_SCALE},
90 {"FAANI", 1, ff_faanidct, ff_ref_idct, NO_PERM},
91 {"IJG-AAN-INT", 0, fdct_ifast, ff_ref_fdct, SCALE_PERM},
92 {"IJG-LLM-INT", 0, ff_jpeg_fdct_islow, ff_ref_fdct, NO_PERM},
93 {"REF-DBL", 1, ff_ref_idct, ff_ref_idct, NO_PERM},
94 {"INT", 1, j_rev_dct, ff_ref_idct, MMX_PERM},
95 {"SIMPLE-C", 1, ff_simple_idct, ff_ref_idct, NO_PERM},
98 {"MMX", 0, ff_fdct_mmx, ff_ref_fdct, NO_PERM, AV_CPU_FLAG_MMX},
100 {"MMX2", 0, ff_fdct_mmx2, ff_ref_fdct, NO_PERM, AV_CPU_FLAG_MMX2},
101 {"SSE2", 0, ff_fdct_sse2, ff_ref_fdct, NO_PERM, AV_CPU_FLAG_SSE2},
105 {"LIBMPEG2-MMX", 1, ff_mmx_idct, ff_ref_idct, MMX_PERM, AV_CPU_FLAG_MMX},
106 {"LIBMPEG2-MMX2", 1, ff_mmxext_idct, ff_ref_idct, MMX_PERM, AV_CPU_FLAG_MMX2},
108 {"SIMPLE-MMX", 1, ff_simple_idct_mmx, ff_ref_idct, MMX_SIMPLE_PERM, AV_CPU_FLAG_MMX},
109 {"XVID-MMX", 1, ff_idct_xvid_mmx, ff_ref_idct, NO_PERM, AV_CPU_FLAG_MMX},
110 {"XVID-MMX2", 1, ff_idct_xvid_mmx2, ff_ref_idct, NO_PERM, AV_CPU_FLAG_MMX2},
111 {"XVID-SSE2", 1, ff_idct_xvid_sse2, ff_ref_idct, SSE2_PERM, AV_CPU_FLAG_SSE2},
115 {"altivecfdct", 0, fdct_altivec, ff_ref_fdct, NO_PERM, AV_CPU_FLAG_ALTIVEC},
119 {"BFINfdct", 0, ff_bfin_fdct, ff_ref_fdct, NO_PERM},
120 {"BFINidct", 1, ff_bfin_idct, ff_ref_idct, NO_PERM},
124 {"SIMPLE-ARM", 1, ff_simple_idct_arm, ff_ref_idct, NO_PERM },
125 {"INT-ARM", 1, ff_j_rev_dct_arm, ff_ref_idct, MMX_PERM },
127 {"SIMPLE-ARMV5TE", 1, ff_simple_idct_armv5te, ff_ref_idct, NO_PERM },
130 {"SIMPLE-ARMV6", 1, ff_simple_idct_armv6, ff_ref_idct, MMX_PERM },
133 {"SIMPLE-NEON", 1, ff_simple_idct_neon, ff_ref_idct, PARTTRANS_PERM },
135 #endif /* ARCH_ARM */
138 {"SIMPLE-ALPHA", 1, ff_simple_idct_axp, ff_ref_idct, NO_PERM },
144 #define AANSCALE_BITS 12
146 uint8_t cropTbl[256 + 2 * MAX_NEG_CROP];
148 static int64_t gettime(void)
151 gettimeofday(&tv,NULL);
152 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
156 #define NB_ITS_SPEED 50000
158 static short idct_mmx_perm[64];
160 static short idct_simple_mmx_perm[64]={
161 0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
162 0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
163 0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
164 0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
165 0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
166 0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
167 0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
168 0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
171 static const uint8_t idct_sse2_row_perm[8] = {0, 4, 1, 5, 2, 6, 3, 7};
173 static void idct_mmx_init(void)
177 /* the mmx/mmxext idct uses a reordered input, so we patch scan tables */
178 for (i = 0; i < 64; i++) {
179 idct_mmx_perm[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
180 // idct_simple_mmx_perm[i] = simple_block_permute_op(i);
184 DECLARE_ALIGNED(16, static DCTELEM, block)[64];
185 DECLARE_ALIGNED(8, static DCTELEM, block1)[64];
186 DECLARE_ALIGNED(8, static DCTELEM, block_org)[64];
188 static inline void mmx_emms(void)
191 if (cpu_flags & AV_CPU_FLAG_MMX)
192 __asm__ volatile ("emms\n\t");
196 static void dct_error(const char *name, int is_idct,
197 void (*fdct_func)(DCTELEM *block),
198 void (*fdct_ref)(DCTELEM *block), int form, int test)
202 int64_t err2, ti, ti1, it1;
203 int64_t sysErr[64], sysErrMax=0;
205 int blockSumErrMax=0, blockSumErr;
208 av_lfg_init(&prng, 1);
212 for(i=0; i<64; i++) sysErr[i]=0;
213 for(it=0;it<NB_ITS;it++) {
219 block1[i] = (av_lfg_get(&prng) % 512) -256;
228 int num = av_lfg_get(&prng) % 10 + 1;
230 block1[av_lfg_get(&prng) % 64] = av_lfg_get(&prng) % 512 -256;
233 block1[0] = av_lfg_get(&prng) % 4096 - 2048;
234 block1[63]= (block1[0]&1)^1;
238 #if 0 // simulate mismatch control
243 if((sum&1)==0) block1[63]^=1;
248 block_org[i]= block1[i];
250 if (form == MMX_PERM) {
252 block[idct_mmx_perm[i]] = block1[i];
253 } else if (form == MMX_SIMPLE_PERM) {
255 block[idct_simple_mmx_perm[i]] = block1[i];
257 } else if (form == SSE2_PERM) {
259 block[(i&0x38) | idct_sse2_row_perm[i&7]] = block1[i];
260 } else if (form == PARTTRANS_PERM) {
262 block[(i&0x24) | ((i&3)<<3) | ((i>>3)&3)] = block1[i];
267 #if 0 // simulate mismatch control for tested IDCT but not the ref
272 if((sum&1)==0) block[63]^=1;
279 if (form == SCALE_PERM) {
280 for(i=0; i<64; i++) {
281 scale = 8*(1 << (AANSCALE_BITS + 11)) / ff_aanscales[i];
282 block[i] = (block[i] * scale /*+ (1<<(AANSCALE_BITS-1))*/) >> AANSCALE_BITS;
290 v = abs(block[i] - block1[i]);
294 sysErr[i] += block[i] - block1[i];
296 if( abs(block[i])>maxout) maxout=abs(block[i]);
298 if(blockSumErrMax < blockSumErr) blockSumErrMax= blockSumErr;
299 #if 0 // print different matrix pairs
303 if((i&7)==0) printf("\n");
304 printf("%4d ", block_org[i]);
307 if((i&7)==0) printf("\n");
308 printf("%4d ", block[i] - block1[i]);
313 for(i=0; i<64; i++) sysErrMax= FFMAX(sysErrMax, FFABS(sysErr[i]));
316 if(i%8==0) printf("\n");
317 printf("%7d ", (int)sysErr[i]);
321 printf("%s %s: err_inf=%d err2=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
322 is_idct ? "IDCT" : "DCT",
323 name, err_inf, (double)err2 / NB_ITS / 64.0, (double)sysErrMax / NB_ITS, maxout, blockSumErrMax);
331 block1[i] = av_lfg_get(&prng) % 512 -256;
341 block1[0] = av_lfg_get(&prng) % 512 -256;
342 block1[1] = av_lfg_get(&prng) % 512 -256;
343 block1[2] = av_lfg_get(&prng) % 512 -256;
344 block1[3] = av_lfg_get(&prng) % 512 -256;
348 if (form == MMX_PERM) {
350 block[idct_mmx_perm[i]] = block1[i];
351 } else if(form == MMX_SIMPLE_PERM) {
353 block[idct_simple_mmx_perm[i]] = block1[i];
362 for(it=0;it<NB_ITS_SPEED;it++) {
365 // memcpy(block, block1, sizeof(DCTELEM) * 64);
366 // do not memcpy especially not fastmemcpy because it does movntq !!!
370 ti1 = gettime() - ti;
371 } while (ti1 < 1000000);
374 printf("%s %s: %0.1f kdct/s\n",
375 is_idct ? "IDCT" : "DCT",
376 name, (double)it1 * 1000.0 / (double)ti1);
379 DECLARE_ALIGNED(8, static uint8_t, img_dest)[64];
380 DECLARE_ALIGNED(8, static uint8_t, img_dest1)[64];
382 static void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
385 static double c8[8][8];
386 static double c4[4][4];
387 double block1[64], block2[64], block3[64];
397 s = (i==0) ? sqrt(1.0/8.0) : sqrt(1.0/4.0);
398 c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
399 sum += c8[i][j] * c8[i][j];
406 s = (i==0) ? sqrt(1.0/4.0) : sqrt(1.0/2.0);
407 c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
408 sum += c4[i][j] * c4[i][j];
417 block1[8*(2*i)+j] = (block[8*(2*i)+j] + block[8*(2*i+1)+j]) * s;
418 block1[8*(2*i+1)+j] = (block[8*(2*i)+j] - block[8*(2*i+1)+j]) * s;
427 sum += c8[k][j] * block1[8*i+k];
438 sum += c4[k][j] * block2[8*(2*k)+i];
439 block3[8*(2*j)+i] = sum;
444 sum += c4[k][j] * block2[8*(2*k+1)+i];
445 block3[8*(2*j+1)+i] = sum;
449 /* clamp and store the result */
457 dest[i * linesize + j] = (int)rint(v);
462 static void idct248_error(const char *name,
463 void (*idct248_put)(uint8_t *dest, int line_size, int16_t *block))
465 int it, i, it1, ti, ti1, err_max, v;
469 av_lfg_init(&prng, 1);
471 /* just one test to see if code is correct (precision is less
474 for(it=0;it<NB_ITS;it++) {
476 /* XXX: use forward transform to generate values */
478 block1[i] = av_lfg_get(&prng) % 256 - 128;
483 idct248_ref(img_dest1, 8, block);
487 idct248_put(img_dest, 8, block);
490 v = abs((int)img_dest[i] - (int)img_dest1[i]);
492 printf("%d %d\n", img_dest[i], img_dest1[i]);
501 printf(" %3d", img_dest1[i*8+j]);
510 printf(" %3d", img_dest[i*8+j]);
516 printf("%s %s: err_inf=%d\n",
517 1 ? "IDCT248" : "DCT248",
523 for(it=0;it<NB_ITS_SPEED;it++) {
526 // memcpy(block, block1, sizeof(DCTELEM) * 64);
527 // do not memcpy especially not fastmemcpy because it does movntq !!!
528 idct248_put(img_dest, 8, block);
531 ti1 = gettime() - ti;
532 } while (ti1 < 1000000);
535 printf("%s %s: %0.1f kdct/s\n",
536 1 ? "IDCT248" : "DCT248",
537 name, (double)it1 * 1000.0 / (double)ti1);
540 static void help(void)
542 printf("dct-test [-i] [<test-number>]\n"
543 "test-number 0 -> test with random matrixes\n"
544 " 1 -> test with random sparse matrixes\n"
545 " 2 -> do 3. test from mpeg4 std\n"
546 "-i test IDCT implementations\n"
547 "-4 test IDCT248 implementations\n");
550 int main(int argc, char **argv)
552 int test_idct = 0, test_248_dct = 0;
555 cpu_flags = av_get_cpu_flags();
560 for(i=0;i<256;i++) cropTbl[i + MAX_NEG_CROP] = i;
561 for(i=0;i<MAX_NEG_CROP;i++) {
563 cropTbl[i + MAX_NEG_CROP + 256] = 255;
567 c = getopt(argc, argv, "ih4");
584 if(optind <argc) test= atoi(argv[optind]);
586 printf("ffmpeg DCT/IDCT test\n");
589 idct248_error("SIMPLE-C", ff_simple_idct248_put);
591 for (i=0;algos[i].name;i++)
592 if (algos[i].is_idct == test_idct && !(~cpu_flags & algos[i].mm_support)) {
593 dct_error (algos[i].name, algos[i].is_idct, algos[i].func, algos[i].ref, algos[i].format, test);