FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/tests/dct.c
Date: 2024-07-16 12:46:59
Exec Total Coverage
Lines: 209 252 82.9%
Functions: 7 8 87.5%
Branches: 150 178 84.3%

Line Branch Exec Source
1 /*
2 * (c) 2001 Fabrice Bellard
3 * 2007 Marc Hoffman <marc.hoffman@analog.com>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * @file
24 * DCT test (c) 2001 Fabrice Bellard
25 * Started from sample code by Juan J. Sierralta P.
26 */
27
28 #include "config.h"
29 #include "config_components.h"
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <string.h>
33 #if HAVE_UNISTD_H
34 #include <unistd.h>
35 #endif
36 #include <math.h>
37
38 #include "libavutil/cpu.h"
39 #include "libavutil/common.h"
40 #include "libavutil/emms.h"
41 #include "libavutil/internal.h"
42 #include "libavutil/lfg.h"
43 #include "libavutil/mem_internal.h"
44 #include "libavutil/time.h"
45
46 #include "libavcodec/dct.h"
47 #include "libavcodec/fdctdsp.h"
48 #include "libavcodec/idctdsp.h"
49 #include "libavcodec/simple_idct.h"
50 #include "libavcodec/xvididct.h"
51 #include "libavcodec/aandcttab.h"
52 #include "libavcodec/faandct.h"
53 #include "libavcodec/faanidct.h"
54 #include "libavcodec/dctref.h"
55
56 struct algo {
57 const char *name;
58 void (*func)(int16_t *block);
59 enum idct_permutation_type perm_type;
60 int cpu_flag;
61 int nonspec;
62 };
63
64 static const struct algo fdct_tab[] = {
65 { "REF-DBL", ff_ref_fdct, FF_IDCT_PERM_NONE },
66 { "IJG-AAN-INT", ff_fdct_ifast, FF_IDCT_PERM_NONE },
67 { "IJG-LLM-INT", ff_jpeg_fdct_islow_8, FF_IDCT_PERM_NONE },
68 #if CONFIG_FAANDCT
69 { "FAAN", ff_faandct, FF_IDCT_PERM_NONE },
70 #endif /* CONFIG_FAANDCT */
71 };
72
73 60000 static void ff_prores_idct_wrap(int16_t *dst){
74 60000 LOCAL_ALIGNED(16, int16_t, qmat, [64]);
75 int i;
76
77
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78 3840000 qmat[i]=4;
79 }
80 60000 ff_prores_idct_10(dst, qmat);
81
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3900000 for(i=0; i<64; i++) {
82 3840000 dst[i] -= 512;
83 }
84 60000 }
85
86 static const struct algo idct_tab[] = {
87 { "REF-DBL", ff_ref_idct, FF_IDCT_PERM_NONE },
88 { "INT", ff_j_rev_dct, FF_IDCT_PERM_LIBMPEG2 },
89 { "SIMPLE-C", ff_simple_idct_int16_8bit, FF_IDCT_PERM_NONE },
90 { "SIMPLE-C10", ff_simple_idct_int16_10bit, FF_IDCT_PERM_NONE },
91 { "SIMPLE-C12", ff_simple_idct_int16_12bit, FF_IDCT_PERM_NONE, 0, 1 },
92 { "PR-C", ff_prores_idct_wrap, FF_IDCT_PERM_NONE, 0, 1 },
93 #if CONFIG_FAANIDCT
94 { "FAANI", ff_faanidct, FF_IDCT_PERM_NONE },
95 #endif /* CONFIG_FAANIDCT */
96 #if CONFIG_MPEG4_DECODER
97 { "XVID", ff_xvid_idct, FF_IDCT_PERM_NONE, 0, 1 },
98 #endif /* CONFIG_MPEG4_DECODER */
99 };
100
101 #if ARCH_AARCH64
102 #include "aarch64/dct.c"
103 #elif ARCH_ARM
104 #include "arm/dct.c"
105 #elif ARCH_PPC
106 #include "ppc/dct.c"
107 #elif ARCH_X86
108 #include "x86/dct.c"
109 #else
110 static const struct algo fdct_tab_arch[] = { { 0 } };
111 static const struct algo idct_tab_arch[] = { { 0 } };
112 #endif
113
114 #define AANSCALE_BITS 12
115
116 #define NB_ITS 20000
117 #define NB_ITS_SPEED 50000
118
119 DECLARE_ALIGNED(16, static int16_t, block)[64];
120 DECLARE_ALIGNED(8, static int16_t, block1)[64];
121
122 1120000 static void init_block(int16_t block[64], int test, int is_idct, AVLFG *prng, int vals)
123 {
124 int i, j;
125
126 1120000 memset(block, 0, 64 * sizeof(*block));
127
128
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1120000 switch (test) {
129 340000 case 0:
130
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22100000 for (i = 0; i < 64; i++)
131 21760000 block[i] = (av_lfg_get(prng) % (2*vals)) -vals;
132
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340000 if (is_idct) {
133 340000 ff_ref_fdct(block);
134
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22100000 for (i = 0; i < 64; i++)
135 21760000 block[i] >>= 3;
136 }
137 340000 break;
138 440000 case 1:
139 440000 j = av_lfg_get(prng) % 10 + 1;
140
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2853686 for (i = 0; i < j; i++) {
141 2413686 int idx = av_lfg_get(prng) % 64;
142 2413686 block[idx] = av_lfg_get(prng) % (2*vals) -vals;
143 }
144 440000 break;
145 340000 case 2:
146 340000 block[ 0] = av_lfg_get(prng) % (16*vals) - (8*vals);
147 340000 block[63] = (block[0] & 1) ^ 1;
148 340000 break;
149 }
150 1120000 }
151
152 1120000 static void permute(int16_t dst[64], const int16_t src[64],
153 enum idct_permutation_type perm_type)
154 {
155 int i;
156
157 #if ARCH_X86
158
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1120000 if (permute_x86(dst, src, perm_type))
159 60000 return;
160 #endif
161
162
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1060000 switch (perm_type) {
163 60000 case FF_IDCT_PERM_LIBMPEG2:
164
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3900000 for (i = 0; i < 64; i++)
165 3840000 dst[(i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2)] = src[i];
166 60000 break;
167 case FF_IDCT_PERM_PARTTRANS:
168 for (i = 0; i < 64; i++)
169 dst[(i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3)] = src[i];
170 break;
171 480000 case FF_IDCT_PERM_TRANSPOSE:
172
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31200000 for (i = 0; i < 64; i++)
173 30720000 dst[(i>>3) | ((i<<3)&0x38)] = src[i];
174 480000 break;
175 520000 default:
176
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33800000 for (i = 0; i < 64; i++)
177 33280000 dst[i] = src[i];
178 520000 break;
179 }
180 }
181
182 56 static int dct_error(const struct algo *dct, int test, int is_idct, int speed, const int bits)
183 {
184
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56 void (*ref)(int16_t *block) = is_idct ? ff_ref_idct : ff_ref_fdct;
185 int it, i, scale;
186 int err_inf, v;
187 56 int64_t err2, ti, ti1, it1, err_sum = 0;
188 56 int64_t sysErr[64], sysErrMax = 0;
189 56 int64_t err2_matrix[64], err2_max = 0;
190 56 int maxout = 0;
191 56 int blockSumErrMax = 0, blockSumErr;
192 AVLFG prng;
193 56 const int vals=1<<bits;
194 double omse, ome;
195 int spec_err;
196
197 56 av_lfg_init(&prng, 1);
198
199 56 err_inf = 0;
200 56 err2 = 0;
201
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3640 for (i = 0; i < 64; i++)
202 3584 err2_matrix[i] = sysErr[i] = 0;
203
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1120056 for (it = 0; it < NB_ITS; it++) {
204 1120000 init_block(block1, test, is_idct, &prng, vals);
205 1120000 permute(block, block1, dct->perm_type);
206
207 1120000 dct->func(block);
208 1120000 emms_c();
209
210
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1120000 if (!strcmp(dct->name, "IJG-AAN-INT")) {
211
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1300000 for (i = 0; i < 64; i++) {
212 1280000 scale = 8 * (1 << (AANSCALE_BITS + 11)) / ff_aanscales[i];
213 1280000 block[i] = (block[i] * scale) >> AANSCALE_BITS;
214 }
215 }
216
217 1120000 ref(block1);
218
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1120000 if (!strcmp(dct->name, "PR-SSE2"))
219
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3900000 for (i = 0; i < 64; i++)
220 3840000 block1[i] = av_clip(block1[i], 4-512, 1019-512);
221
222 1120000 blockSumErr = 0;
223
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72800000 for (i = 0; i < 64; i++) {
224 71680000 int err = block[i] - block1[i];
225 71680000 err_sum += err;
226 71680000 v = abs(err);
227
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71680000 if (v > err_inf)
228 61 err_inf = v;
229 71680000 err2_matrix[i] += v * (int64_t)v;
230 71680000 err2 += v * (int64_t)v;
231 71680000 sysErr[i] += block[i] - block1[i];
232 71680000 blockSumErr += v;
233
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71680000 if (abs(block[i]) > maxout)
234 756 maxout = abs(block[i]);
235 }
236
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1120000 if (blockSumErrMax < blockSumErr)
237 246 blockSumErrMax = blockSumErr;
238 }
239
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3640 for (i = 0; i < 64; i++) {
240 3584 sysErrMax = FFMAX(sysErrMax, FFABS(sysErr[i]));
241 3584 err2_max = FFMAX(err2_max , FFABS(err2_matrix[i]));
242 }
243
244
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3640 for (i = 0; i < 64; i++) {
245
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3584 if (i % 8 == 0)
246 448 printf("\n");
247 3584 printf("%7d ", (int) sysErr[i]);
248 }
249 56 printf("\n");
250
251 56 omse = (double) err2 / NB_ITS / 64;
252 56 ome = (double) err_sum / NB_ITS / 64;
253
254
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56 spec_err = is_idct && (err_inf > 1 || omse > 0.02 || fabs(ome) > 0.0015);
255
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56 if (test < 2)
256
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39 spec_err = is_idct && ((double) err2_max / NB_ITS > 0.06 || (double) sysErrMax / NB_ITS > 0.015);
257
258 56 printf("%s %s: max_err=%d omse=%0.8f ome=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
259 56 is_idct ? "IDCT" : "DCT", dct->name, err_inf,
260
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56 omse, ome, (double) sysErrMax / NB_ITS,
261 maxout, blockSumErrMax);
262
263
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56 if (spec_err && !dct->nonspec) {
264 printf("Failed!\n");
265 return 1;
266 }
267
268
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56 if (!speed)
269 56 return 0;
270
271 /* speed test */
272
273 init_block(block, test, is_idct, &prng, vals);
274 permute(block1, block, dct->perm_type);
275
276 ti = av_gettime_relative();
277 it1 = 0;
278 do {
279 for (it = 0; it < NB_ITS_SPEED; it++) {
280 memcpy(block, block1, sizeof(block));
281 dct->func(block);
282 }
283 emms_c();
284 it1 += NB_ITS_SPEED;
285 ti1 = av_gettime_relative() - ti;
286 } while (ti1 < 1000000);
287
288 printf("%s %s: %0.1f kdct/s\n", is_idct ? "IDCT" : "DCT", dct->name,
289 (double) it1 * 1000.0 / (double) ti1);
290
291 return 0;
292 }
293
294 DECLARE_ALIGNED(8, static uint8_t, img_dest)[64];
295 DECLARE_ALIGNED(8, static uint8_t, img_dest1)[64];
296
297 20000 static void idct248_ref(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
298 {
299 static int init;
300 static double c8[8][8];
301 static double c4[4][4];
302 double block1[64], block2[64], block3[64];
303 double s, sum, v;
304 int i, j, k;
305
306
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20000 if (!init) {
307 1 init = 1;
308
309
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9 for (i = 0; i < 8; i++) {
310 8 sum = 0;
311
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72 for (j = 0; j < 8; j++) {
312
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64 s = (i == 0) ? sqrt(1.0 / 8.0) : sqrt(1.0 / 4.0);
313 64 c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
314 64 sum += c8[i][j] * c8[i][j];
315 }
316 }
317
318
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5 for (i = 0; i < 4; i++) {
319 4 sum = 0;
320
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20 for (j = 0; j < 4; j++) {
321
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16 s = (i == 0) ? sqrt(1.0 / 4.0) : sqrt(1.0 / 2.0);
322 16 c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
323 16 sum += c4[i][j] * c4[i][j];
324 }
325 }
326 }
327
328 /* butterfly */
329 20000 s = 0.5 * sqrt(2.0);
330
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100000 for (i = 0; i < 4; i++) {
331
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720000 for (j = 0; j < 8; j++) {
332 640000 block1[8 * (2 * i) + j] =
333 640000 (block[8 * (2 * i) + j] + block[8 * (2 * i + 1) + j]) * s;
334 640000 block1[8 * (2 * i + 1) + j] =
335 640000 (block[8 * (2 * i) + j] - block[8 * (2 * i + 1) + j]) * s;
336 }
337 }
338
339 /* idct8 on lines */
340
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180000 for (i = 0; i < 8; i++) {
341
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1440000 for (j = 0; j < 8; j++) {
342 1280000 sum = 0;
343
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11520000 for (k = 0; k < 8; k++)
344 10240000 sum += c8[k][j] * block1[8 * i + k];
345 1280000 block2[8 * i + j] = sum;
346 }
347 }
348
349 /* idct4 */
350
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180000 for (i = 0; i < 8; i++) {
351
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800000 for (j = 0; j < 4; j++) {
352 /* top */
353 640000 sum = 0;
354
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3200000 for (k = 0; k < 4; k++)
355 2560000 sum += c4[k][j] * block2[8 * (2 * k) + i];
356 640000 block3[8 * (2 * j) + i] = sum;
357
358 /* bottom */
359 640000 sum = 0;
360
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3200000 for (k = 0; k < 4; k++)
361 2560000 sum += c4[k][j] * block2[8 * (2 * k + 1) + i];
362 640000 block3[8 * (2 * j + 1) + i] = sum;
363 }
364 }
365
366 /* clamp and store the result */
367
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180000 for (i = 0; i < 8; i++) {
368
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1440000 for (j = 0; j < 8; j++) {
369 1280000 v = block3[8 * i + j];
370
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1280000 if (v < 0) v = 0;
371
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1226527 else if (v > 255) v = 255;
372 1280000 dest[i * linesize + j] = (int) rint(v);
373 }
374 }
375 20000 }
376
377 1 static void idct248_error(const char *name,
378 void (*idct248_put)(uint8_t *dest,
379 ptrdiff_t line_size,
380 int16_t *block),
381 int speed)
382 {
383 int it, i, it1, ti, ti1, err_max, v;
384 AVLFG prng;
385
386 1 av_lfg_init(&prng, 1);
387
388 /* just one test to see if code is correct (precision is less
389 important here) */
390 1 err_max = 0;
391
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20001 for (it = 0; it < NB_ITS; it++) {
392 /* XXX: use forward transform to generate values */
393
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1300000 for (i = 0; i < 64; i++)
394 1280000 block1[i] = av_lfg_get(&prng) % 256 - 128;
395 20000 block1[0] += 1024;
396
397
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1300000 for (i = 0; i < 64; i++)
398 1280000 block[i] = block1[i];
399 20000 idct248_ref(img_dest1, 8, block);
400
401
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1300000 for (i = 0; i < 64; i++)
402 1280000 block[i] = block1[i];
403 20000 idct248_put(img_dest, 8, block);
404
405
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1300000 for (i = 0; i < 64; i++) {
406 1280000 v = abs((int) img_dest[i] - (int) img_dest1[i]);
407
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1280000 if (v == 255)
408 printf("%d %d\n", img_dest[i], img_dest1[i]);
409
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1280000 if (v > err_max)
410 1 err_max = v;
411 }
412 #if 0
413 printf("ref=\n");
414 for(i=0;i<8;i++) {
415 int j;
416 for(j=0;j<8;j++) {
417 printf(" %3d", img_dest1[i*8+j]);
418 }
419 printf("\n");
420 }
421
422 printf("out=\n");
423 for(i=0;i<8;i++) {
424 int j;
425 for(j=0;j<8;j++) {
426 printf(" %3d", img_dest[i*8+j]);
427 }
428 printf("\n");
429 }
430 #endif
431 }
432 1 printf("%s %s: err_inf=%d\n", 1 ? "IDCT248" : "DCT248", name, err_max);
433
434
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1 if (!speed)
435 1 return;
436
437 ti = av_gettime_relative();
438 it1 = 0;
439 do {
440 for (it = 0; it < NB_ITS_SPEED; it++) {
441 for (i = 0; i < 64; i++)
442 block[i] = block1[i];
443 idct248_put(img_dest, 8, block);
444 }
445 emms_c();
446 it1 += NB_ITS_SPEED;
447 ti1 = av_gettime_relative() - ti;
448 } while (ti1 < 1000000);
449
450 printf("%s %s: %0.1f kdct/s\n", 1 ? "IDCT248" : "DCT248", name,
451 (double) it1 * 1000.0 / (double) ti1);
452 }
453
454 static void help(void)
455 {
456 printf("dct-test [-i] [<test-number>] [<bits>]\n"
457 "test-number 0 -> test with random matrixes\n"
458 " 1 -> test with random sparse matrixes\n"
459 " 2 -> do 3. test from MPEG-4 std\n"
460 "bits Number of time domain bits to use, 8 is default\n"
461 "-i test IDCT implementations\n"
462 "-4 test IDCT248 implementations\n"
463 "-t speed test\n");
464 }
465
466 #if !HAVE_GETOPT
467 #include "compat/getopt.c"
468 #endif
469
470 5 int main(int argc, char **argv)
471 {
472 5 int test_idct = 0, test_248_dct = 0;
473 int c, i;
474 5 int test = 1;
475 5 int speed = 0;
476 5 int err = 0;
477 5 int bits=8;
478
479 5 ff_ref_dct_init();
480
481 for (;;) {
482 9 c = getopt(argc, argv, "ih4t");
483
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9 if (c == -1)
484 5 break;
485
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4 switch (c) {
486 3 case 'i':
487 3 test_idct = 1;
488 3 break;
489 1 case '4':
490 1 test_248_dct = 1;
491 1 break;
492 case 't':
493 speed = 1;
494 break;
495 default:
496 case 'h':
497 help();
498 return 0;
499 }
500 }
501
502
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5 if (optind < argc)
503 3 test = atoi(argv[optind]);
504
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5 if(optind+1 < argc) bits= atoi(argv[optind+1]);
505
506 5 printf("ffmpeg DCT/IDCT test\n");
507
508
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5 if (test_248_dct) {
509 1 idct248_error("SIMPLE-C", ff_simple_idct248_put, speed);
510 } else {
511 4 const int cpu_flags = av_get_cpu_flags();
512
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4 if (test_idct) {
513
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27 for (i = 0; i < FF_ARRAY_ELEMS(idct_tab); i++)
514 24 err |= dct_error(&idct_tab[i], test, test_idct, speed, bits);
515
516
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30 for (i = 0; idct_tab_arch[i].name; i++)
517
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27 if (!(~cpu_flags & idct_tab_arch[i].cpu_flag))
518 27 err |= dct_error(&idct_tab_arch[i], test, test_idct, speed, bits);
519 }
520 #if CONFIG_FDCTDSP
521 else {
522
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5 for (i = 0; i < FF_ARRAY_ELEMS(fdct_tab); i++)
523 4 err |= dct_error(&fdct_tab[i], test, test_idct, speed, bits);
524
525
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2 for (i = 0; fdct_tab_arch[i].name; i++)
526
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1 if (!(~cpu_flags & fdct_tab_arch[i].cpu_flag))
527 1 err |= dct_error(&fdct_tab_arch[i], test, test_idct, speed, bits);
528 }
529 #endif /* CONFIG_FDCTDSP */
530 }
531
532
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5 if (err)
533 printf("Error: %d.\n", err);
534
535 5 return !!err;
536 }
537