/*
* (c) 2002 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/fft-test.c
+ * @file
* FFT and MDCT tests.
*/
-#include "libavutil/mathematics.h"
-#include "libavutil/lfg.h"
-#include "libavutil/log.h"
-#include "fft.h"
+#include "config.h"
+
#include <math.h>
+#if HAVE_UNISTD_H
#include <unistd.h>
-#include <sys/time.h>
+#endif
+#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#undef exit
+#include "libavutil/cpu.h"
+#include "libavutil/lfg.h"
+#include "libavutil/log.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/time.h"
-/* reference fft */
+#include "fft.h"
+#if FFT_FLOAT
+#include "dct.h"
+#include "rdft.h"
+#endif
-#define MUL16(a,b) ((a) * (b))
+/* reference fft */
-#define CMAC(pre, pim, are, aim, bre, bim) \
-{\
- pre += (MUL16(are, bre) - MUL16(aim, bim));\
- pim += (MUL16(are, bim) + MUL16(bre, aim));\
-}
+#define MUL16(a, b) ((a) * (b))
-FFTComplex *exptab;
+#define CMAC(pre, pim, are, aim, bre, bim) \
+ { \
+ pre += (MUL16(are, bre) - MUL16(aim, bim)); \
+ pim += (MUL16(are, bim) + MUL16(bre, aim)); \
+ }
-static void fft_ref_init(int nbits, int inverse)
+#if FFT_FLOAT
+#define RANGE 1.0
+#define REF_SCALE(x, bits) (x)
+#define FMT "%10.6f"
+#else
+#define RANGE 16384
+#define REF_SCALE(x, bits) ((x) / (1 << (bits)))
+#define FMT "%6d"
+#endif
+
+static struct {
+ float re, im;
+} *exptab;
+
+static int fft_ref_init(int nbits, int inverse)
{
- int n, i;
- double c1, s1, alpha;
+ int i, n = 1 << nbits;
- n = 1 << nbits;
- exptab = av_malloc((n / 2) * sizeof(FFTComplex));
+ exptab = av_malloc((n / 2) * sizeof(*exptab));
+ if (!exptab)
+ return AVERROR(ENOMEM);
- for (i = 0; i < (n/2); i++) {
- alpha = 2 * M_PI * (float)i / (float)n;
- c1 = cos(alpha);
- s1 = sin(alpha);
+ for (i = 0; i < (n / 2); i++) {
+ double alpha = 2 * M_PI * (float) i / (float) n;
+ double c1 = cos(alpha), s1 = sin(alpha);
if (!inverse)
s1 = -s1;
exptab[i].re = c1;
exptab[i].im = s1;
}
+ return 0;
}
static void fft_ref(FFTComplex *tabr, FFTComplex *tab, int nbits)
{
- int n, i, j, k, n2;
- double tmp_re, tmp_im, s, c;
- FFTComplex *q;
+ int i, j;
+ int n = 1 << nbits;
+ int n2 = n >> 1;
- n = 1 << nbits;
- n2 = n >> 1;
for (i = 0; i < n; i++) {
- tmp_re = 0;
- tmp_im = 0;
- q = tab;
+ double tmp_re = 0, tmp_im = 0;
+ FFTComplex *q = tab;
for (j = 0; j < n; j++) {
- k = (i * j) & (n - 1);
+ double s, c;
+ int k = (i * j) & (n - 1);
if (k >= n2) {
c = -exptab[k - n2].re;
s = -exptab[k - n2].im;
CMAC(tmp_re, tmp_im, c, s, q->re, q->im);
q++;
}
- tabr[i].re = tmp_re;
- tabr[i].im = tmp_im;
+ tabr[i].re = REF_SCALE(tmp_re, nbits);
+ tabr[i].im = REF_SCALE(tmp_im, nbits);
}
}
-static void imdct_ref(float *out, float *in, int nbits)
+#if CONFIG_MDCT
+static void imdct_ref(FFTSample *out, FFTSample *in, int nbits)
{
- int n = 1<<nbits;
- int k, i, a;
- double sum, f;
+ int i, k, n = 1 << nbits;
for (i = 0; i < n; i++) {
- sum = 0;
- for (k = 0; k < n/2; k++) {
- a = (2 * i + 1 + (n / 2)) * (2 * k + 1);
- f = cos(M_PI * a / (double)(2 * n));
+ double sum = 0;
+ for (k = 0; k < n / 2; k++) {
+ int a = (2 * i + 1 + (n / 2)) * (2 * k + 1);
+ double f = cos(M_PI * a / (double) (2 * n));
sum += f * in[k];
}
- out[i] = -sum;
+ out[i] = REF_SCALE(-sum, nbits - 2);
}
}
/* NOTE: no normalisation by 1 / N is done */
-static void mdct_ref(float *output, float *input, int nbits)
+static void mdct_ref(FFTSample *output, FFTSample *input, int nbits)
{
- int n = 1<<nbits;
- int k, i;
- double a, s;
+ int i, k, n = 1 << nbits;
/* do it by hand */
- for (k = 0; k < n/2; k++) {
- s = 0;
+ for (k = 0; k < n / 2; k++) {
+ double s = 0;
for (i = 0; i < n; i++) {
- a = (2*M_PI*(2*i+1+n/2)*(2*k+1) / (4 * n));
+ double a = (2 * M_PI * (2 * i + 1 + n / 2) * (2 * k + 1) / (4 * n));
s += input[i] * cos(a);
}
- output[k] = s;
+ output[k] = REF_SCALE(s, nbits - 1);
}
}
+#endif /* CONFIG_MDCT */
+#if FFT_FLOAT
+#if CONFIG_DCT
static void idct_ref(float *output, float *input, int nbits)
{
- int n = 1<<nbits;
- int k, i;
- double a, s;
+ int i, k, n = 1 << nbits;
/* do it by hand */
for (i = 0; i < n; i++) {
- s = 0.5 * input[0];
+ double s = 0.5 * input[0];
for (k = 1; k < n; k++) {
- a = M_PI*k*(i+0.5) / n;
+ double a = M_PI * k * (i + 0.5) / n;
s += input[k] * cos(a);
}
output[i] = 2 * s / n;
}
}
+
static void dct_ref(float *output, float *input, int nbits)
{
- int n = 1<<nbits;
- int k, i;
- double a, s;
+ int i, k, n = 1 << nbits;
/* do it by hand */
for (k = 0; k < n; k++) {
- s = 0;
+ double s = 0;
for (i = 0; i < n; i++) {
- a = M_PI*k*(i+0.5) / n;
+ double a = M_PI * k * (i + 0.5) / n;
s += input[i] * cos(a);
}
output[k] = s;
}
}
+#endif /* CONFIG_DCT */
+#endif /* FFT_FLOAT */
-
-static float frandom(AVLFG *prng)
-{
- return (int16_t)av_lfg_get(prng) / 32768.0;
-}
-
-static int64_t gettime(void)
+static FFTSample frandom(AVLFG *prng)
{
- struct timeval tv;
- gettimeofday(&tv,NULL);
- return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
+ return (int16_t) av_lfg_get(prng) / 32768.0 * RANGE;
}
-static void check_diff(float *tab1, float *tab2, int n, double scale)
+static int check_diff(FFTSample *tab1, FFTSample *tab2, int n, double scale)
{
- int i;
- double max= 0;
- double error= 0;
+ int i, err = 0;
+ double error = 0, max = 0;
for (i = 0; i < n; i++) {
- double e= fabsf(tab1[i] - (tab2[i] / scale));
+ double e = fabs(tab1[i] - (tab2[i] / scale)) / RANGE;
if (e >= 1e-3) {
- av_log(NULL, AV_LOG_ERROR, "ERROR %d: %f %f\n",
+ av_log(NULL, AV_LOG_ERROR, "ERROR %5d: "FMT" "FMT"\n",
i, tab1[i], tab2[i]);
+ err = 1;
}
- error+= e*e;
- if(e>max) max= e;
+ error += e * e;
+ if (e > max)
+ max = e;
}
- av_log(NULL, AV_LOG_INFO, "max:%f e:%g\n", max, sqrt(error)/n);
+ av_log(NULL, AV_LOG_INFO, "max:%f e:%g\n", max, sqrt(error) / n);
+ return err;
}
-
static void help(void)
{
- av_log(NULL, AV_LOG_INFO,"usage: fft-test [-h] [-s] [-i] [-n b]\n"
+ av_log(NULL, AV_LOG_INFO,
+ "usage: fft-test [-h] [-s] [-i] [-n b]\n"
"-h print this help\n"
"-s speed test\n"
"-m (I)MDCT test\n"
"-d (I)DCT test\n"
+ "-r (I)RDFT test\n"
"-i inverse transform test\n"
"-n b set the transform size to 2^b\n"
- "-f x set scale factor for output data of (I)MDCT to x\n"
- );
- exit(1);
+ "-f x set scale factor for output data of (I)MDCT to x\n");
}
enum tf_transform {
TRANSFORM_DCT,
};
+#if !HAVE_GETOPT
+#include "compat/getopt.c"
+#endif
+
int main(int argc, char **argv)
{
FFTComplex *tab, *tab1, *tab_ref;
FFTSample *tab2;
- int it, i, c;
- int do_speed = 0;
enum tf_transform transform = TRANSFORM_FFT;
- int do_inverse = 0;
- FFTContext s1, *s = &s1;
- FFTContext m1, *m = &m1;
- RDFTContext r1, *r = &r1;
- DCTContext d1, *d = &d1;
- int fft_nbits, fft_size, fft_size_2;
+ FFTContext m, s;
+#if FFT_FLOAT
+ RDFTContext r;
+ DCTContext d;
+#endif /* FFT_FLOAT */
+ int it, i, err = 1;
+ int do_speed = 0, do_inverse = 0;
+ int fft_nbits = 9, fft_size;
double scale = 1.0;
AVLFG prng;
+
av_lfg_init(&prng, 1);
- fft_nbits = 9;
- for(;;) {
- c = getopt(argc, argv, "hsimrdn:f:");
+ for (;;) {
+ int c = getopt(argc, argv, "hsimrdn:f:c:");
if (c == -1)
break;
- switch(c) {
+ switch (c) {
case 'h':
help();
- break;
+ return 1;
case 's':
do_speed = 1;
break;
case 'f':
scale = atof(optarg);
break;
+ case 'c':
+ {
+ int cpuflags = av_parse_cpu_flags(optarg);
+ if (cpuflags < 0)
+ return 1;
+ av_set_cpu_flags_mask(cpuflags);
+ break;
+ }
}
}
fft_size = 1 << fft_nbits;
- fft_size_2 = fft_size >> 1;
- tab = av_malloc(fft_size * sizeof(FFTComplex));
- tab1 = av_malloc(fft_size * sizeof(FFTComplex));
- tab_ref = av_malloc(fft_size * sizeof(FFTComplex));
- tab2 = av_malloc(fft_size * sizeof(FFTSample));
+ tab = av_malloc(fft_size * sizeof(FFTComplex));
+ tab1 = av_malloc(fft_size * sizeof(FFTComplex));
+ tab_ref = av_malloc(fft_size * sizeof(FFTComplex));
+ tab2 = av_malloc(fft_size * sizeof(FFTSample));
+
+ if (!(tab && tab1 && tab_ref && tab2))
+ goto cleanup;
switch (transform) {
+#if CONFIG_MDCT
case TRANSFORM_MDCT:
- av_log(NULL, AV_LOG_INFO,"Scale factor is set to %f\n", scale);
+ av_log(NULL, AV_LOG_INFO, "Scale factor is set to %f\n", scale);
if (do_inverse)
- av_log(NULL, AV_LOG_INFO,"IMDCT");
+ av_log(NULL, AV_LOG_INFO, "IMDCT");
else
- av_log(NULL, AV_LOG_INFO,"MDCT");
- ff_mdct_init(m, fft_nbits, do_inverse, scale);
+ av_log(NULL, AV_LOG_INFO, "MDCT");
+ ff_mdct_init(&m, fft_nbits, do_inverse, scale);
break;
+#endif /* CONFIG_MDCT */
case TRANSFORM_FFT:
if (do_inverse)
- av_log(NULL, AV_LOG_INFO,"IFFT");
+ av_log(NULL, AV_LOG_INFO, "IFFT");
else
- av_log(NULL, AV_LOG_INFO,"FFT");
- ff_fft_init(s, fft_nbits, do_inverse);
- fft_ref_init(fft_nbits, do_inverse);
+ av_log(NULL, AV_LOG_INFO, "FFT");
+ ff_fft_init(&s, fft_nbits, do_inverse);
+ if (err = fft_ref_init(fft_nbits, do_inverse) < 0)
+ goto cleanup;
break;
+#if FFT_FLOAT
+#if CONFIG_RDFT
case TRANSFORM_RDFT:
if (do_inverse)
- av_log(NULL, AV_LOG_INFO,"IRDFT");
+ av_log(NULL, AV_LOG_INFO, "IDFT_C2R");
else
- av_log(NULL, AV_LOG_INFO,"RDFT");
- ff_rdft_init(r, fft_nbits, do_inverse ? IRDFT : RDFT);
- fft_ref_init(fft_nbits, do_inverse);
+ av_log(NULL, AV_LOG_INFO, "DFT_R2C");
+ ff_rdft_init(&r, fft_nbits, do_inverse ? IDFT_C2R : DFT_R2C);
+ if (err = fft_ref_init(fft_nbits, do_inverse) < 0)
+ goto cleanup;
break;
+#endif /* CONFIG_RDFT */
+#if CONFIG_DCT
case TRANSFORM_DCT:
if (do_inverse)
- av_log(NULL, AV_LOG_INFO,"IDCT");
+ av_log(NULL, AV_LOG_INFO, "DCT_III");
else
- av_log(NULL, AV_LOG_INFO,"DCT");
- ff_dct_init(d, fft_nbits, do_inverse);
+ av_log(NULL, AV_LOG_INFO, "DCT_II");
+ ff_dct_init(&d, fft_nbits, do_inverse ? DCT_III : DCT_II);
break;
+#endif /* CONFIG_DCT */
+#endif /* FFT_FLOAT */
+ default:
+ av_log(NULL, AV_LOG_ERROR, "Requested transform not supported\n");
+ goto cleanup;
}
- av_log(NULL, AV_LOG_INFO," %d test\n", fft_size);
+ av_log(NULL, AV_LOG_INFO, " %d test\n", fft_size);
/* generate random data */
}
/* checking result */
- av_log(NULL, AV_LOG_INFO,"Checking...\n");
+ av_log(NULL, AV_LOG_INFO, "Checking...\n");
switch (transform) {
+#if CONFIG_MDCT
case TRANSFORM_MDCT:
if (do_inverse) {
- imdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);
- ff_imdct_calc(m, tab2, (float *)tab1);
- check_diff((float *)tab_ref, tab2, fft_size, scale);
+ imdct_ref(&tab_ref->re, &tab1->re, fft_nbits);
+ m.imdct_calc(&m, tab2, &tab1->re);
+ err = check_diff(&tab_ref->re, tab2, fft_size, scale);
} else {
- mdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);
-
- ff_mdct_calc(m, tab2, (float *)tab1);
-
- check_diff((float *)tab_ref, tab2, fft_size / 2, scale);
+ mdct_ref(&tab_ref->re, &tab1->re, fft_nbits);
+ m.mdct_calc(&m, tab2, &tab1->re);
+ err = check_diff(&tab_ref->re, tab2, fft_size / 2, scale);
}
break;
+#endif /* CONFIG_MDCT */
case TRANSFORM_FFT:
memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
- ff_fft_permute(s, tab);
- ff_fft_calc(s, tab);
+ s.fft_permute(&s, tab);
+ s.fft_calc(&s, tab);
fft_ref(tab_ref, tab1, fft_nbits);
- check_diff((float *)tab_ref, (float *)tab, fft_size * 2, 1.0);
+ err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 1.0);
break;
+#if FFT_FLOAT
+#if CONFIG_RDFT
case TRANSFORM_RDFT:
+ {
+ int fft_size_2 = fft_size >> 1;
if (do_inverse) {
- tab1[ 0].im = 0;
+ tab1[0].im = 0;
tab1[fft_size_2].im = 0;
for (i = 1; i < fft_size_2; i++) {
- tab1[fft_size_2+i].re = tab1[fft_size_2-i].re;
- tab1[fft_size_2+i].im = -tab1[fft_size_2-i].im;
+ tab1[fft_size_2 + i].re = tab1[fft_size_2 - i].re;
+ tab1[fft_size_2 + i].im = -tab1[fft_size_2 - i].im;
}
memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
tab2[1] = tab1[fft_size_2].re;
- ff_rdft_calc(r, tab2);
+ r.rdft_calc(&r, tab2);
fft_ref(tab_ref, tab1, fft_nbits);
for (i = 0; i < fft_size; i++) {
tab[i].re = tab2[i];
tab[i].im = 0;
}
- check_diff((float *)tab_ref, (float *)tab, fft_size * 2, 0.5);
+ err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 0.5);
} else {
for (i = 0; i < fft_size; i++) {
tab2[i] = tab1[i].re;
tab1[i].im = 0;
}
- ff_rdft_calc(r, tab2);
+ r.rdft_calc(&r, tab2);
fft_ref(tab_ref, tab1, fft_nbits);
tab_ref[0].im = tab_ref[fft_size_2].re;
- check_diff((float *)tab_ref, (float *)tab2, fft_size, 1.0);
+ err = check_diff(&tab_ref->re, tab2, fft_size, 1.0);
}
break;
+ }
+#endif /* CONFIG_RDFT */
+#if CONFIG_DCT
case TRANSFORM_DCT:
memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
- ff_dct_calc(d, tab);
- if (do_inverse) {
- idct_ref(tab_ref, tab1, fft_nbits);
- } else {
- dct_ref(tab_ref, tab1, fft_nbits);
- }
- check_diff((float *)tab_ref, (float *)tab, fft_size, 1.0);
+ d.dct_calc(&d, &tab->re);
+ if (do_inverse)
+ idct_ref(&tab_ref->re, &tab1->re, fft_nbits);
+ else
+ dct_ref(&tab_ref->re, &tab1->re, fft_nbits);
+ err = check_diff(&tab_ref->re, &tab->re, fft_size, 1.0);
break;
+#endif /* CONFIG_DCT */
+#endif /* FFT_FLOAT */
}
/* do a speed test */
int64_t time_start, duration;
int nb_its;
- av_log(NULL, AV_LOG_INFO,"Speed test...\n");
+ av_log(NULL, AV_LOG_INFO, "Speed test...\n");
/* we measure during about 1 seconds */
nb_its = 1;
- for(;;) {
- time_start = gettime();
+ for (;;) {
+ time_start = av_gettime_relative();
for (it = 0; it < nb_its; it++) {
switch (transform) {
case TRANSFORM_MDCT:
- if (do_inverse) {
- ff_imdct_calc(m, (float *)tab, (float *)tab1);
- } else {
- ff_mdct_calc(m, (float *)tab, (float *)tab1);
- }
+ if (do_inverse)
+ m.imdct_calc(&m, &tab->re, &tab1->re);
+ else
+ m.mdct_calc(&m, &tab->re, &tab1->re);
break;
case TRANSFORM_FFT:
memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
- ff_fft_calc(s, tab);
+ s.fft_calc(&s, tab);
break;
+#if FFT_FLOAT
case TRANSFORM_RDFT:
memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
- ff_rdft_calc(r, tab2);
+ r.rdft_calc(&r, tab2);
break;
case TRANSFORM_DCT:
memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
- ff_dct_calc(d, tab2);
+ d.dct_calc(&d, tab2);
break;
+#endif /* FFT_FLOAT */
}
}
- duration = gettime() - time_start;
+ duration = av_gettime_relative() - time_start;
if (duration >= 1000000)
break;
nb_its *= 2;
}
- av_log(NULL, AV_LOG_INFO,"time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
- (double)duration / nb_its,
- (double)duration / 1000000.0,
+ av_log(NULL, AV_LOG_INFO,
+ "time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
+ (double) duration / nb_its,
+ (double) duration / 1000000.0,
nb_its);
}
switch (transform) {
+#if CONFIG_MDCT
case TRANSFORM_MDCT:
- ff_mdct_end(m);
+ ff_mdct_end(&m);
break;
+#endif /* CONFIG_MDCT */
case TRANSFORM_FFT:
- ff_fft_end(s);
+ ff_fft_end(&s);
break;
+#if FFT_FLOAT
+#if CONFIG_RDFT
case TRANSFORM_RDFT:
- ff_rdft_end(r);
+ ff_rdft_end(&r);
break;
+#endif /* CONFIG_RDFT */
+#if CONFIG_DCT
case TRANSFORM_DCT:
- ff_dct_end(d);
+ ff_dct_end(&d);
break;
+#endif /* CONFIG_DCT */
+#endif /* FFT_FLOAT */
}
- return 0;
+
+cleanup:
+ av_free(tab);
+ av_free(tab1);
+ av_free(tab2);
+ av_free(tab_ref);
+ av_free(exptab);
+
+ if (err)
+ printf("Error: %d.\n", err);
+
+ return !!err;
}
projects / ffmpeg / blobdiff