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]));
315 #if 1 // dump systematic errors
317 if(i%8==0) printf("\n");
318 printf("%7d ", (int)sysErr[i]);
323 printf("%s %s: err_inf=%d err2=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
324 is_idct ? "IDCT" : "DCT",
325 name, err_inf, (double)err2 / NB_ITS / 64.0, (double)sysErrMax / NB_ITS, maxout, blockSumErrMax);
333 block1[i] = av_lfg_get(&prng) % 512 -256;
343 block1[0] = av_lfg_get(&prng) % 512 -256;
344 block1[1] = av_lfg_get(&prng) % 512 -256;
345 block1[2] = av_lfg_get(&prng) % 512 -256;
346 block1[3] = av_lfg_get(&prng) % 512 -256;
350 if (form == MMX_PERM) {
352 block[idct_mmx_perm[i]] = block1[i];
353 } else if(form == MMX_SIMPLE_PERM) {
355 block[idct_simple_mmx_perm[i]] = block1[i];
364 for(it=0;it<NB_ITS_SPEED;it++) {
367 // memcpy(block, block1, sizeof(DCTELEM) * 64);
368 // do not memcpy especially not fastmemcpy because it does movntq !!!
372 ti1 = gettime() - ti;
373 } while (ti1 < 1000000);
376 printf("%s %s: %0.1f kdct/s\n",
377 is_idct ? "IDCT" : "DCT",
378 name, (double)it1 * 1000.0 / (double)ti1);
382 DECLARE_ALIGNED(8, static uint8_t, img_dest)[64];
383 DECLARE_ALIGNED(8, static uint8_t, img_dest1)[64];
385 static void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
388 static double c8[8][8];
389 static double c4[4][4];
390 double block1[64], block2[64], block3[64];
400 s = (i==0) ? sqrt(1.0/8.0) : sqrt(1.0/4.0);
401 c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
402 sum += c8[i][j] * c8[i][j];
409 s = (i==0) ? sqrt(1.0/4.0) : sqrt(1.0/2.0);
410 c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
411 sum += c4[i][j] * c4[i][j];
420 block1[8*(2*i)+j] = (block[8*(2*i)+j] + block[8*(2*i+1)+j]) * s;
421 block1[8*(2*i+1)+j] = (block[8*(2*i)+j] - block[8*(2*i+1)+j]) * s;
430 sum += c8[k][j] * block1[8*i+k];
441 sum += c4[k][j] * block2[8*(2*k)+i];
442 block3[8*(2*j)+i] = sum;
447 sum += c4[k][j] * block2[8*(2*k+1)+i];
448 block3[8*(2*j+1)+i] = sum;
452 /* clamp and store the result */
460 dest[i * linesize + j] = (int)rint(v);
465 static void idct248_error(const char *name,
466 void (*idct248_put)(uint8_t *dest, int line_size, int16_t *block))
468 int it, i, it1, ti, ti1, err_max, v;
472 av_lfg_init(&prng, 1);
474 /* just one test to see if code is correct (precision is less
477 for(it=0;it<NB_ITS;it++) {
479 /* XXX: use forward transform to generate values */
481 block1[i] = av_lfg_get(&prng) % 256 - 128;
486 idct248_ref(img_dest1, 8, block);
490 idct248_put(img_dest, 8, block);
493 v = abs((int)img_dest[i] - (int)img_dest1[i]);
495 printf("%d %d\n", img_dest[i], img_dest1[i]);
504 printf(" %3d", img_dest1[i*8+j]);
513 printf(" %3d", img_dest[i*8+j]);
519 printf("%s %s: err_inf=%d\n",
520 1 ? "IDCT248" : "DCT248",
526 for(it=0;it<NB_ITS_SPEED;it++) {
529 // memcpy(block, block1, sizeof(DCTELEM) * 64);
530 // do not memcpy especially not fastmemcpy because it does movntq !!!
531 idct248_put(img_dest, 8, block);
534 ti1 = gettime() - ti;
535 } while (ti1 < 1000000);
538 printf("%s %s: %0.1f kdct/s\n",
539 1 ? "IDCT248" : "DCT248",
540 name, (double)it1 * 1000.0 / (double)ti1);
543 static void help(void)
545 printf("dct-test [-i] [<test-number>]\n"
546 "test-number 0 -> test with random matrixes\n"
547 " 1 -> test with random sparse matrixes\n"
548 " 2 -> do 3. test from mpeg4 std\n"
549 "-i test IDCT implementations\n"
550 "-4 test IDCT248 implementations\n");
553 int main(int argc, char **argv)
555 int test_idct = 0, test_248_dct = 0;
558 cpu_flags = av_get_cpu_flags();
563 for(i=0;i<256;i++) cropTbl[i + MAX_NEG_CROP] = i;
564 for(i=0;i<MAX_NEG_CROP;i++) {
566 cropTbl[i + MAX_NEG_CROP + 256] = 255;
570 c = getopt(argc, argv, "ih4");
587 if(optind <argc) test= atoi(argv[optind]);
589 printf("ffmpeg DCT/IDCT test\n");
592 idct248_error("SIMPLE-C", ff_simple_idct248_put);
594 for (i=0;algos[i].name;i++)
595 if (algos[i].is_idct == test_idct && !(~cpu_flags & algos[i].mm_support)) {
596 dct_error (algos[i].name, algos[i].is_idct, algos[i].func, algos[i].ref, algos[i].format, test);