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ffmpeg/libavcodec/tests/dct.c

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/*
* (c) 2001 Fabrice Bellard
* 2007 Marc Hoffman <marc.hoffman@analog.com>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* DCT test (c) 2001 Fabrice Bellard
* Started from sample code by Juan J. Sierralta P.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
#include "libavutil/cpu.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/lfg.h"
#include "libavutil/time.h"
#include "libavcodec/aandcttab.h"
#include "libavcodec/dct.h"
#include "libavcodec/dctref.h"
#include "libavcodec/faandct.h"
#include "libavcodec/faanidct.h"
#include "libavcodec/idctdsp.h"
#include "libavcodec/simple_idct.h"
#include "libavcodec/xvididct.h"
struct algo {
const char *name;
void (*func)(int16_t *block);
enum idct_permutation_type perm_type;
int cpu_flag;
int nonspec;
};
static const struct algo fdct_tab[] = {
{ "REF-DBL", ff_ref_fdct, FF_IDCT_PERM_NONE },
{ "IJG-AAN-INT", ff_fdct_ifast, FF_IDCT_PERM_NONE },
{ "IJG-LLM-INT", ff_jpeg_fdct_islow_8, FF_IDCT_PERM_NONE },
#if CONFIG_FAANDCT
{ "FAAN", ff_faandct, FF_IDCT_PERM_NONE },
#endif /* CONFIG_FAANDCT */
};
static const struct algo idct_tab[] = {
{ "REF-DBL", ff_ref_idct, FF_IDCT_PERM_NONE },
{ "INT", ff_j_rev_dct, FF_IDCT_PERM_LIBMPEG2 },
{ "SIMPLE-C", ff_simple_idct_8, FF_IDCT_PERM_NONE },
#if CONFIG_FAANIDCT
{ "FAANI", ff_faanidct, FF_IDCT_PERM_NONE },
#endif /* CONFIG_FAANIDCT */
#if CONFIG_MPEG4_DECODER
{ "XVID", ff_xvid_idct, FF_IDCT_PERM_NONE, 0, 1 },
#endif /* CONFIG_MPEG4_DECODER */
};
#if ARCH_ARM
#include "arm/dct.c"
#elif ARCH_PPC
#include "ppc/dct.c"
#elif ARCH_X86
#include "x86/dct.c"
#else
static const struct algo fdct_tab_arch[] = { { 0 } };
static const struct algo idct_tab_arch[] = { { 0 } };
#endif
#define AANSCALE_BITS 12
#define NB_ITS 20000
#define NB_ITS_SPEED 50000
DECLARE_ALIGNED(16, static int16_t, block)[64];
DECLARE_ALIGNED(8, static int16_t, block1)[64];
static void init_block(int16_t block[64], int test, int is_idct, AVLFG *prng)
{
int i, j;
memset(block, 0, 64 * sizeof(*block));
switch (test) {
case 0:
for (i = 0; i < 64; i++)
block[i] = (av_lfg_get(prng) % 512) - 256;
if (is_idct) {
ff_ref_fdct(block);
for (i = 0; i < 64; i++)
block[i] >>= 3;
}
break;
case 1:
j = av_lfg_get(prng) % 10 + 1;
for (i = 0; i < j; i++)
block[av_lfg_get(prng) % 64] = av_lfg_get(prng) % 512 - 256;
break;
case 2:
block[ 0] = av_lfg_get(prng) % 4096 - 2048;
block[63] = (block[0] & 1) ^ 1;
break;
}
}
static void permute(int16_t dst[64], const int16_t src[64],
enum idct_permutation_type perm_type)
{
int i;
#if ARCH_X86
if (permute_x86(dst, src, perm_type))
return;
#endif
switch (perm_type) {
case FF_IDCT_PERM_LIBMPEG2:
for (i = 0; i < 64; i++)
dst[(i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2)] = src[i];
break;
case FF_IDCT_PERM_PARTTRANS:
for (i = 0; i < 64; i++)
dst[(i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3)] = src[i];
break;
default:
for (i = 0; i < 64; i++)
dst[i] = src[i];
break;
}
}
static int dct_error(const struct algo *dct, int test, int is_idct, int speed)
{
void (*ref)(int16_t *block) = is_idct ? ff_ref_idct : ff_ref_fdct;
int it, i, scale;
int err_inf, v;
int64_t err2, ti, ti1, it1, err_sum = 0;
int64_t sysErr[64], sysErrMax = 0;
int maxout = 0;
int blockSumErrMax = 0, blockSumErr;
AVLFG prng;
double omse, ome;
int spec_err;
av_lfg_init(&prng, 1);
err_inf = 0;
err2 = 0;
for (i = 0; i < 64; i++)
sysErr[i] = 0;
for (it = 0; it < NB_ITS; it++) {
init_block(block1, test, is_idct, &prng);
permute(block, block1, dct->perm_type);
dct->func(block);
emms_c();
if (!strcmp(dct->name, "IJG-AAN-INT")) {
for (i = 0; i < 64; i++) {
scale = 8 * (1 << (AANSCALE_BITS + 11)) / ff_aanscales[i];
block[i] = (block[i] * scale) >> AANSCALE_BITS;
}
}
ref(block1);
blockSumErr = 0;
for (i = 0; i < 64; i++) {
int err = block[i] - block1[i];
err_sum += err;
v = abs(err);
if (v > err_inf)
err_inf = v;
err2 += v * v;
sysErr[i] += block[i] - block1[i];
blockSumErr += v;
if (abs(block[i]) > maxout)
maxout = abs(block[i]);
}
if (blockSumErrMax < blockSumErr)
blockSumErrMax = blockSumErr;
}
for (i = 0; i < 64; i++)
sysErrMax = FFMAX(sysErrMax, FFABS(sysErr[i]));
for (i = 0; i < 64; i++) {
if (i % 8 == 0)
printf("\n");
printf("%7d ", (int) sysErr[i]);
}
printf("\n");
omse = (double) err2 / NB_ITS / 64;
ome = (double) err_sum / NB_ITS / 64;
spec_err = is_idct && (err_inf > 1 || omse > 0.02 || fabs(ome) > 0.0015);
printf("%s %s: ppe=%d omse=%0.8f ome=%0.8f syserr=%0.8f maxout=%d blockSumErr=%d\n",
is_idct ? "IDCT" : "DCT", dct->name, err_inf,
omse, ome, (double) sysErrMax / NB_ITS,
maxout, blockSumErrMax);
if (spec_err && !dct->nonspec)
return 1;
if (!speed)
return 0;
/* speed test */
init_block(block, test, is_idct, &prng);
permute(block1, block, dct->perm_type);
ti = av_gettime_relative();
it1 = 0;
do {
for (it = 0; it < NB_ITS_SPEED; it++) {
memcpy(block, block1, sizeof(block));
dct->func(block);
}
it1 += NB_ITS_SPEED;
ti1 = av_gettime_relative() - ti;
} while (ti1 < 1000000);
emms_c();
printf("%s %s: %0.1f kdct/s\n", is_idct ? "IDCT" : "DCT", dct->name,
(double) it1 * 1000.0 / (double) ti1);
return 0;
}
DECLARE_ALIGNED(8, static uint8_t, img_dest)[64];
DECLARE_ALIGNED(8, static uint8_t, img_dest1)[64];
static void idct248_ref(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
{
static int init;
static double c8[8][8];
static double c4[4][4];
double block1[64], block2[64], block3[64];
double s, sum, v;
int i, j, k;
if (!init) {
init = 1;
for (i = 0; i < 8; i++) {
sum = 0;
for (j = 0; j < 8; j++) {
s = (i == 0) ? sqrt(1.0 / 8.0) : sqrt(1.0 / 4.0);
c8[i][j] = s * cos(M_PI * i * (j + 0.5) / 8.0);
sum += c8[i][j] * c8[i][j];
}
}
for (i = 0; i < 4; i++) {
sum = 0;
for (j = 0; j < 4; j++) {
s = (i == 0) ? sqrt(1.0 / 4.0) : sqrt(1.0 / 2.0);
c4[i][j] = s * cos(M_PI * i * (j + 0.5) / 4.0);
sum += c4[i][j] * c4[i][j];
}
}
}
/* butterfly */
s = 0.5 * sqrt(2.0);
for (i = 0; i < 4; i++) {
for (j = 0; j < 8; j++) {
block1[8 * (2 * i) + j] =
(block[8 * (2 * i) + j] + block[8 * (2 * i + 1) + j]) * s;
block1[8 * (2 * i + 1) + j] =
(block[8 * (2 * i) + j] - block[8 * (2 * i + 1) + j]) * s;
}
}
/* idct8 on lines */
for (i = 0; i < 8; i++) {
for (j = 0; j < 8; j++) {
sum = 0;
for (k = 0; k < 8; k++)
sum += c8[k][j] * block1[8 * i + k];
block2[8 * i + j] = sum;
}
}
/* idct4 */
for (i = 0; i < 8; i++) {
for (j = 0; j < 4; j++) {
/* top */
sum = 0;
for (k = 0; k < 4; k++)
sum += c4[k][j] * block2[8 * (2 * k) + i];
block3[8 * (2 * j) + i] = sum;
/* bottom */
sum = 0;
for (k = 0; k < 4; k++)
sum += c4[k][j] * block2[8 * (2 * k + 1) + i];
block3[8 * (2 * j + 1) + i] = sum;
}
}
/* clamp and store the result */
for (i = 0; i < 8; i++) {
for (j = 0; j < 8; j++) {
v = block3[8 * i + j];
if (v < 0) v = 0;
else if (v > 255) v = 255;
dest[i * linesize + j] = (int) rint(v);
}
}
}
static void idct248_error(const char *name,
void (*idct248_put)(uint8_t *dest,
ptrdiff_t line_size,
int16_t *block),
int speed)
{
int it, i, it1, ti, ti1, err_max, v;
AVLFG prng;
av_lfg_init(&prng, 1);
/* just one test to see if code is correct (precision is less
important here) */
err_max = 0;
for (it = 0; it < NB_ITS; it++) {
/* XXX: use forward transform to generate values */
for (i = 0; i < 64; i++)
block1[i] = av_lfg_get(&prng) % 256 - 128;
block1[0] += 1024;
for (i = 0; i < 64; i++)
block[i] = block1[i];
idct248_ref(img_dest1, 8, block);
for (i = 0; i < 64; i++)
block[i] = block1[i];
idct248_put(img_dest, 8, block);
for (i = 0; i < 64; i++) {
v = abs((int) img_dest[i] - (int) img_dest1[i]);
if (v == 255)
printf("%d %d\n", img_dest[i], img_dest1[i]);
if (v > err_max)
err_max = v;
}
}
printf("%s %s: err_inf=%d\n", 1 ? "IDCT248" : "DCT248", name, err_max);
if (!speed)
return;
ti = av_gettime_relative();
it1 = 0;
do {
for (it = 0; it < NB_ITS_SPEED; it++) {
for (i = 0; i < 64; i++)
block[i] = block1[i];
idct248_put(img_dest, 8, block);
}
it1 += NB_ITS_SPEED;
ti1 = av_gettime_relative() - ti;
} while (ti1 < 1000000);
emms_c();
printf("%s %s: %0.1f kdct/s\n", 1 ? "IDCT248" : "DCT248", name,
(double) it1 * 1000.0 / (double) ti1);
}
static void help(void)
{
printf("dct-test [-i] [<test-number>]\n"
"test-number 0 -> test with random matrixes\n"
" 1 -> test with random sparse matrixes\n"
" 2 -> do 3. test from MPEG-4 std\n"
"-i test IDCT implementations\n"
"-4 test IDCT248 implementations\n"
"-t speed test\n");
}
#if !HAVE_GETOPT
#include "compat/getopt.c"
#endif
int main(int argc, char **argv)
{
int test_idct = 0, test_248_dct = 0;
int c, i;
int test = 1;
int speed = 0;
int err = 0;
ff_ref_dct_init();
for (;;) {
c = getopt(argc, argv, "ih4t");
if (c == -1)
break;
switch (c) {
case 'i':
test_idct = 1;
break;
case '4':
test_248_dct = 1;
break;
case 't':
speed = 1;
break;
default:
case 'h':
help();
return 0;
}
}
if (optind < argc)
test = atoi(argv[optind]);
printf("Libav DCT/IDCT test\n");
if (test_248_dct) {
idct248_error("SIMPLE-C", ff_simple_idct248_put, speed);
} else {
const int cpu_flags = av_get_cpu_flags();
if (test_idct) {
for (i = 0; i < FF_ARRAY_ELEMS(idct_tab); i++)
err |= dct_error(&idct_tab[i], test, test_idct, speed);
for (i = 0; idct_tab_arch[i].name; i++)
if (!(~cpu_flags & idct_tab_arch[i].cpu_flag))
err |= dct_error(&idct_tab_arch[i], test, test_idct, speed);
}
#if CONFIG_FDCTDSP
else {
for (i = 0; i < FF_ARRAY_ELEMS(fdct_tab); i++)
err |= dct_error(&fdct_tab[i], test, test_idct, speed);
for (i = 0; fdct_tab_arch[i].name; i++)
if (!(~cpu_flags & fdct_tab_arch[i].cpu_flag))
err |= dct_error(&fdct_tab_arch[i], test, test_idct, speed);
}
#endif /* CONFIG_FDCTDSP */
}
if (err)
printf("Error: %d.\n", err);
return !!err;
}
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