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.
37 #include "libavutil/cpu.h"
38 #include "libavutil/common.h"
39 #include "libavutil/internal.h"
40 #include "libavutil/lfg.h"
41 #include "libavutil/time.h"
43 #include "libavcodec/dct.h"
44 #include "libavcodec/idctdsp.h"
45 #include "libavcodec/simple_idct.h"
46 #include "libavcodec/xvididct.h"
47 #include "libavcodec/aandcttab.h"
48 #include "libavcodec/faandct.h"
49 #include "libavcodec/faanidct.h"
50 #include "libavcodec/dctref.h"
54 void (*func)(int16_t *block);
55 enum idct_permutation_type perm_type;
60 static const struct algo fdct_tab[] = {
61 { "REF-DBL", ff_ref_fdct, FF_IDCT_PERM_NONE },
62 { "IJG-AAN-INT", ff_fdct_ifast, FF_IDCT_PERM_NONE },
63 { "IJG-LLM-INT", ff_jpeg_fdct_islow_8, FF_IDCT_PERM_NONE },
65 { "FAAN", ff_faandct, FF_IDCT_PERM_NONE },
66 #endif /* CONFIG_FAANDCT */
69 static void ff_prores_idct_wrap(int16_t *dst){
70 LOCAL_ALIGNED(16, int16_t, qmat, [64]);
76 ff_prores_idct(dst, qmat);
82 static const struct algo idct_tab[] = {
83 { "REF-DBL", ff_ref_idct, FF_IDCT_PERM_NONE },
84 { "INT", ff_j_rev_dct, FF_IDCT_PERM_LIBMPEG2 },
85 { "SIMPLE-C", ff_simple_idct_8, FF_IDCT_PERM_NONE },
86 { "SIMPLE-C10", ff_simple_idct_10, FF_IDCT_PERM_NONE },
87 { "SIMPLE-C12", ff_simple_idct_12, FF_IDCT_PERM_NONE, 0, 1 },
88 { "PR-C", ff_prores_idct_wrap, FF_IDCT_PERM_NONE, 0, 1 },
90 { "FAANI", ff_faanidct, FF_IDCT_PERM_NONE },
91 #endif /* CONFIG_FAANIDCT */
92 #if CONFIG_MPEG4_DECODER
93 { "XVID", ff_xvid_idct, FF_IDCT_PERM_NONE, 0, 1 },
94 #endif /* CONFIG_MPEG4_DECODER */
104 static const struct algo fdct_tab_arch[] = { { 0 } };
105 static const struct algo idct_tab_arch[] = { { 0 } };
108 #define AANSCALE_BITS 12
111 #define NB_ITS_SPEED 50000
113 DECLARE_ALIGNED(16, static int16_t, block)[64];
114 DECLARE_ALIGNED(8, static int16_t, block1)[64];
116 static void init_block(int16_t block[64], int test, int is_idct, AVLFG *prng, int vals)
120 memset(block, 0, 64 * sizeof(*block));
124 for (i = 0; i < 64; i++)
125 block[i] = (av_lfg_get(prng) % (2*vals)) -vals;
128 for (i = 0; i < 64; i++)
133 j = av_lfg_get(prng) % 10 + 1;
134 for (i = 0; i < j; i++) {
135 int idx = av_lfg_get(prng) % 64;
136 block[idx] = av_lfg_get(prng) % (2*vals) -vals;
140 block[ 0] = av_lfg_get(prng) % (16*vals) - (8*vals);
141 block[63] = (block[0] & 1) ^ 1;
146 static void permute(int16_t dst[64], const int16_t src[64],
147 enum idct_permutation_type perm_type)
152 if (permute_x86(dst, src, perm_type))
157 case FF_IDCT_PERM_LIBMPEG2:
158 for (i = 0; i < 64; i++)
159 dst[(i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2)] = src[i];
161 case FF_IDCT_PERM_PARTTRANS:
162 for (i = 0; i < 64; i++)
163 dst[(i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3)] = src[i];
165 case FF_IDCT_PERM_TRANSPOSE:
166 for (i = 0; i < 64; i++)
167 dst[(i>>3) | ((i<<3)&0x38)] = src[i];
170 for (i = 0; i < 64; i++)
176 static int dct_error(const struct algo *dct, int test, int is_idct, int speed, const int bits)
178 void (*ref)(int16_t *block) = is_idct ? ff_ref_idct : ff_ref_fdct;
181 int64_t err2, ti, ti1, it1, err_sum = 0;
182 int64_t sysErr[64], sysErrMax = 0;
184 int blockSumErrMax = 0, blockSumErr;
186 const int vals=1<<bits;
190 av_lfg_init(&prng, 1);
194 for (i = 0; i < 64; i++)
196 for (it = 0; it < NB_ITS; it++) {
197 init_block(block1, test, is_idct, &prng, vals);
198 permute(block, block1, dct->perm_type);
203 if (!strcmp(dct->name, "IJG-AAN-INT")) {
204 for (i = 0; i < 64; i++) {
205 scale = 8 * (1 << (AANSCALE_BITS + 11)) / ff_aanscales[i];
206 block[i] = (block[i] * scale) >> AANSCALE_BITS;
211 if (!strcmp(dct->name, "PR-SSE2"))
212 for (i = 0; i < 64; i++)
213 block1[i] = av_clip(block1[i], 4-512, 1019-512);
216 for (i = 0; i < 64; i++) {
217 int err = block[i] - block1[i];
223 sysErr[i] += block[i] - block1[i];
225 if (abs(block[i]) > maxout)
226 maxout = abs(block[i]);
228 if (blockSumErrMax < blockSumErr)
229 blockSumErrMax = blockSumErr;
231 for (i = 0; i < 64; i++)
232 sysErrMax = FFMAX(sysErrMax, FFABS(sysErr[i]));
234 for (i = 0; i < 64; i++) {
237 printf("%7d ", (int) sysErr[i]);
241 omse = (double) err2 / NB_ITS / 64;
242 ome = (double) err_sum / NB_ITS / 64;
244 spec_err = is_idct && (err_inf > 1 || omse > 0.02 || fabs(ome) > 0.0015);
246 printf("%s %s: max_err=%d omse=%0.8f ome=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
247 is_idct ? "IDCT" : "DCT", dct->name, err_inf,
248 omse, ome, (double) sysErrMax / NB_ITS,
249 maxout, blockSumErrMax);
251 if (spec_err && !dct->nonspec) {
261 init_block(block, test, is_idct, &prng, vals);
262 permute(block1, block, dct->perm_type);
264 ti = av_gettime_relative();
267 for (it = 0; it < NB_ITS_SPEED; it++) {
268 memcpy(block, block1, sizeof(block));
273 ti1 = av_gettime_relative() - ti;
274 } while (ti1 < 1000000);
276 printf("%s %s: %0.1f kdct/s\n", is_idct ? "IDCT" : "DCT", dct->name,
277 (double) it1 * 1000.0 / (double) ti1);
282 DECLARE_ALIGNED(8, static uint8_t, img_dest)[64];
283 DECLARE_ALIGNED(8, static uint8_t, img_dest1)[64];
285 static void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
288 static double c8[8][8];
289 static double c4[4][4];
290 double block1[64], block2[64], block3[64];
297 for (i = 0; i < 8; i++) {
299 for (j = 0; j < 8; j++) {
300 s = (i == 0) ? sqrt(1.0 / 8.0) : sqrt(1.0 / 4.0);
301 c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
302 sum += c8[i][j] * c8[i][j];
306 for (i = 0; i < 4; i++) {
308 for (j = 0; j < 4; j++) {
309 s = (i == 0) ? sqrt(1.0 / 4.0) : sqrt(1.0 / 2.0);
310 c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
311 sum += c4[i][j] * c4[i][j];
318 for (i = 0; i < 4; i++) {
319 for (j = 0; j < 8; j++) {
320 block1[8 * (2 * i) + j] =
321 (block[8 * (2 * i) + j] + block[8 * (2 * i + 1) + j]) * s;
322 block1[8 * (2 * i + 1) + j] =
323 (block[8 * (2 * i) + j] - block[8 * (2 * i + 1) + j]) * s;
328 for (i = 0; i < 8; i++) {
329 for (j = 0; j < 8; j++) {
331 for (k = 0; k < 8; k++)
332 sum += c8[k][j] * block1[8 * i + k];
333 block2[8 * i + j] = sum;
338 for (i = 0; i < 8; i++) {
339 for (j = 0; j < 4; j++) {
342 for (k = 0; k < 4; k++)
343 sum += c4[k][j] * block2[8 * (2 * k) + i];
344 block3[8 * (2 * j) + i] = sum;
348 for (k = 0; k < 4; k++)
349 sum += c4[k][j] * block2[8 * (2 * k + 1) + i];
350 block3[8 * (2 * j + 1) + i] = sum;
354 /* clamp and store the result */
355 for (i = 0; i < 8; i++) {
356 for (j = 0; j < 8; j++) {
357 v = block3[8 * i + j];
359 else if (v > 255) v = 255;
360 dest[i * linesize + j] = (int) rint(v);
365 static void idct248_error(const char *name,
366 void (*idct248_put)(uint8_t *dest, int line_size,
370 int it, i, it1, ti, ti1, err_max, v;
373 av_lfg_init(&prng, 1);
375 /* just one test to see if code is correct (precision is less
378 for (it = 0; it < NB_ITS; it++) {
379 /* XXX: use forward transform to generate values */
380 for (i = 0; i < 64; i++)
381 block1[i] = av_lfg_get(&prng) % 256 - 128;
384 for (i = 0; i < 64; i++)
385 block[i] = block1[i];
386 idct248_ref(img_dest1, 8, block);
388 for (i = 0; i < 64; i++)
389 block[i] = block1[i];
390 idct248_put(img_dest, 8, block);
392 for (i = 0; i < 64; i++) {
393 v = abs((int) img_dest[i] - (int) img_dest1[i]);
395 printf("%d %d\n", img_dest[i], img_dest1[i]);
404 printf(" %3d", img_dest1[i*8+j]);
413 printf(" %3d", img_dest[i*8+j]);
419 printf("%s %s: err_inf=%d\n", 1 ? "IDCT248" : "DCT248", name, err_max);
424 ti = av_gettime_relative();
427 for (it = 0; it < NB_ITS_SPEED; it++) {
428 for (i = 0; i < 64; i++)
429 block[i] = block1[i];
430 idct248_put(img_dest, 8, block);
434 ti1 = av_gettime_relative() - ti;
435 } while (ti1 < 1000000);
437 printf("%s %s: %0.1f kdct/s\n", 1 ? "IDCT248" : "DCT248", name,
438 (double) it1 * 1000.0 / (double) ti1);
441 static void help(void)
443 printf("dct-test [-i] [<test-number>] [<bits>]\n"
444 "test-number 0 -> test with random matrixes\n"
445 " 1 -> test with random sparse matrixes\n"
446 " 2 -> do 3. test from MPEG-4 std\n"
447 "bits Number of time domain bits to use, 8 is default\n"
448 "-i test IDCT implementations\n"
449 "-4 test IDCT248 implementations\n"
454 #include "compat/getopt.c"
457 int main(int argc, char **argv)
459 int test_idct = 0, test_248_dct = 0;
469 c = getopt(argc, argv, "ih4t");
490 test = atoi(argv[optind]);
491 if(optind+1 < argc) bits= atoi(argv[optind+1]);
493 printf("ffmpeg DCT/IDCT test\n");
496 idct248_error("SIMPLE-C", ff_simple_idct248_put, speed);
498 const int cpu_flags = av_get_cpu_flags();
500 for (i = 0; i < FF_ARRAY_ELEMS(idct_tab); i++)
501 err |= dct_error(&idct_tab[i], test, test_idct, speed, bits);
503 for (i = 0; idct_tab_arch[i].name; i++)
504 if (!(~cpu_flags & idct_tab_arch[i].cpu_flag))
505 err |= dct_error(&idct_tab_arch[i], test, test_idct, speed, bits);
509 for (i = 0; i < FF_ARRAY_ELEMS(fdct_tab); i++)
510 err |= dct_error(&fdct_tab[i], test, test_idct, speed, bits);
512 for (i = 0; fdct_tab_arch[i].name; i++)
513 if (!(~cpu_flags & fdct_tab_arch[i].cpu_flag))
514 err |= dct_error(&fdct_tab_arch[i], test, test_idct, speed, bits);
516 #endif /* CONFIG_FDCTDSP */
520 printf("Error: %d.\n", err);