+/*
+ * (c) 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
/**
- * @file fft-test.c
+ * @file libavcodec/fft-test.c
* FFT and MDCT tests.
*/
+#include "libavutil/lfg.h"
#include "dsputil.h"
#include <math.h>
#include <unistd.h>
#include <sys/time.h>
+#include <stdlib.h>
+#include <string.h>
-int mm_flags;
+#undef exit
/* reference fft */
FFTComplex *exptab;
-void fft_ref_init(int nbits, int inverse)
+static void fft_ref_init(int nbits, int inverse)
{
int n, i;
- float c1, s1, alpha;
+ double c1, s1, alpha;
n = 1 << nbits;
exptab = av_malloc((n / 2) * sizeof(FFTComplex));
}
}
-void fft_ref(FFTComplex *tabr, FFTComplex *tab, int nbits)
+static void fft_ref(FFTComplex *tabr, FFTComplex *tab, int nbits)
{
int n, i, j, k, n2;
- float tmp_re, tmp_im, s, c;
+ double tmp_re, tmp_im, s, c;
FFTComplex *q;
n = 1 << nbits;
}
}
-void imdct_ref(float *out, float *in, int n)
+static void imdct_ref(float *out, float *in, int nbits)
{
+ int n = 1<<nbits;
int k, i, a;
- float sum, f;
+ double sum, f;
for(i=0;i<n;i++) {
sum = 0;
}
/* NOTE: no normalisation by 1 / N is done */
-void mdct_ref(float *output, float *input, int n)
+static void mdct_ref(float *output, float *input, int nbits)
{
+ int n = 1<<nbits;
int k, i;
- float a, s;
+ double a, s;
/* do it by hand */
for(k=0;k<n/2;k++) {
}
-float frandom(void)
+static float frandom(void)
{
- return (float)((random() & 0xffff) - 32768) / 32768.0;
+ AVLFG prng;
+ av_lfg_init(&prng, 1);
+ return (float)((av_lfg_get(&prng) & 0xffff) - 32768) / 32768.0;
}
-int64_t gettime(void)
+static int64_t gettime(void)
{
struct timeval tv;
gettimeofday(&tv,NULL);
return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
}
-void check_diff(float *tab1, float *tab2, int n)
+static void check_diff(float *tab1, float *tab2, int n)
{
int i;
+ double max= 0;
+ double error= 0;
for(i=0;i<n;i++) {
- if (fabsf(tab1[i] - tab2[i]) >= 1e-3) {
- printf("ERROR %d: %f %f\n",
+ double e= fabsf(tab1[i] - tab2[i]);
+ if (e >= 1e-3) {
+ av_log(NULL, AV_LOG_ERROR, "ERROR %d: %f %f\n",
i, tab1[i], tab2[i]);
}
+ error+= e*e;
+ if(e>max) max= e;
}
+ av_log(NULL, AV_LOG_INFO, "max:%f e:%g\n", max, sqrt(error)/n);
}
-void help(void)
+static void help(void)
{
- printf("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"
int main(int argc, char **argv)
{
FFTComplex *tab, *tab1, *tab_ref;
- FFTSample *tabtmp, *tab2;
+ FFTSample *tab2;
int it, i, c;
int do_speed = 0;
int do_mdct = 0;
MDCTContext m1, *m = &m1;
int fft_nbits, fft_size;
- mm_flags = 0;
fft_nbits = 9;
for(;;) {
c = getopt(argc, argv, "hsimn:");
tab = av_malloc(fft_size * sizeof(FFTComplex));
tab1 = av_malloc(fft_size * sizeof(FFTComplex));
tab_ref = av_malloc(fft_size * sizeof(FFTComplex));
- tabtmp = av_malloc(fft_size / 2 * sizeof(FFTSample));
tab2 = av_malloc(fft_size * sizeof(FFTSample));
if (do_mdct) {
if (do_inverse)
- printf("IMDCT");
+ av_log(NULL, AV_LOG_INFO,"IMDCT");
else
- printf("MDCT");
+ av_log(NULL, AV_LOG_INFO,"MDCT");
ff_mdct_init(m, fft_nbits, do_inverse);
} else {
if (do_inverse)
- printf("IFFT");
+ av_log(NULL, AV_LOG_INFO,"IFFT");
else
- printf("FFT");
- fft_init(s, fft_nbits, do_inverse);
+ av_log(NULL, AV_LOG_INFO,"FFT");
+ ff_fft_init(s, fft_nbits, do_inverse);
fft_ref_init(fft_nbits, do_inverse);
}
- printf(" %d test\n", fft_size);
+ av_log(NULL, AV_LOG_INFO," %d test\n", fft_size);
/* generate random data */
}
/* checking result */
- printf("Checking...\n");
+ av_log(NULL, AV_LOG_INFO,"Checking...\n");
if (do_mdct) {
if (do_inverse) {
- imdct_ref((float *)tab_ref, (float *)tab1, fft_size);
- ff_imdct_calc(m, tab2, (float *)tab1, tabtmp);
+ imdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);
+ ff_imdct_calc(m, tab2, (float *)tab1);
check_diff((float *)tab_ref, tab2, fft_size);
} else {
- mdct_ref((float *)tab_ref, (float *)tab1, fft_size);
-
- ff_mdct_calc(m, tab2, (float *)tab1, tabtmp);
+ 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);
}
} else {
memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
- fft_permute(s, tab);
- fft_calc(s, tab);
-
+ ff_fft_permute(s, tab);
+ ff_fft_calc(s, tab);
+
fft_ref(tab_ref, tab1, fft_nbits);
check_diff((float *)tab_ref, (float *)tab, fft_size * 2);
}
int64_t time_start, duration;
int nb_its;
- printf("Speed test...\n");
+ av_log(NULL, AV_LOG_INFO,"Speed test...\n");
/* we measure during about 1 seconds */
nb_its = 1;
for(;;) {
for(it=0;it<nb_its;it++) {
if (do_mdct) {
if (do_inverse) {
- ff_imdct_calc(m, (float *)tab, (float *)tab1, tabtmp);
+ ff_imdct_calc(m, (float *)tab, (float *)tab1);
} else {
- ff_mdct_calc(m, (float *)tab, (float *)tab1, tabtmp);
+ ff_mdct_calc(m, (float *)tab, (float *)tab1);
}
} else {
memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
- fft_calc(s, tab);
+ ff_fft_calc(s, tab);
}
}
duration = gettime() - time_start;
break;
nb_its *= 2;
}
- printf("time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
- (double)duration / nb_its,
+ 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);
}
-
+
if (do_mdct) {
ff_mdct_end(m);
} else {
- fft_end(s);
+ ff_fft_end(s);
}
return 0;
}
projects / frescor / ffmpeg.git / blobdiff