mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2025-02-04 02:56:24 +00:00
Fixed-point support in fft-test
Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
29a290439b
commit
6efe6028ed
@ -656,7 +656,7 @@ SKIPHEADERS += mpegaudio3.h
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EXAMPLES = api
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TESTPROGS = cabac dct eval fft h264 iirfilter rangecoder snow
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TESTPROGS = cabac dct eval fft fft-fixed h264 iirfilter rangecoder snow
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TESTPROGS-$(HAVE_MMX) += motion
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TESTOBJS = dctref.o
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20
libavcodec/fft-fixed-test.c
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20
libavcodec/fft-fixed-test.c
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@ -0,0 +1,20 @@
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/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define CONFIG_FFT_FLOAT 0
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#include "fft-test.c"
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@ -27,8 +27,10 @@
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#include "libavutil/lfg.h"
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#include "libavutil/log.h"
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#include "fft.h"
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#if CONFIG_FFT_FLOAT
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#include "dct.h"
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#include "rdft.h"
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#endif
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#include <math.h>
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#include <unistd.h>
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#include <sys/time.h>
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@ -47,7 +49,19 @@
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pim += (MUL16(are, bim) + MUL16(bre, aim));\
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}
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FFTComplex *exptab;
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#if CONFIG_FFT_FLOAT
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# define RANGE 1.0
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# define REF_SCALE(x, bits) (x)
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# define FMT "%10.6f"
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#else
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# define RANGE 16384
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# define REF_SCALE(x, bits) ((x) / (1<<(bits)))
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# define FMT "%6d"
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#endif
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struct {
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float re, im;
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} *exptab;
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static void fft_ref_init(int nbits, int inverse)
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{
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@ -55,7 +69,7 @@ static void fft_ref_init(int nbits, int inverse)
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double c1, s1, alpha;
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n = 1 << nbits;
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exptab = av_malloc((n / 2) * sizeof(FFTComplex));
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exptab = av_malloc((n / 2) * sizeof(*exptab));
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for (i = 0; i < (n/2); i++) {
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alpha = 2 * M_PI * (float)i / (float)n;
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@ -92,12 +106,12 @@ static void fft_ref(FFTComplex *tabr, FFTComplex *tab, int nbits)
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CMAC(tmp_re, tmp_im, c, s, q->re, q->im);
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q++;
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}
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tabr[i].re = tmp_re;
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tabr[i].im = tmp_im;
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tabr[i].re = REF_SCALE(tmp_re, nbits);
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tabr[i].im = REF_SCALE(tmp_im, nbits);
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}
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}
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static void imdct_ref(float *out, float *in, int nbits)
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static void imdct_ref(FFTSample *out, FFTSample *in, int nbits)
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{
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int n = 1<<nbits;
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int k, i, a;
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@ -110,12 +124,12 @@ static void imdct_ref(float *out, float *in, int nbits)
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f = cos(M_PI * a / (double)(2 * n));
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sum += f * in[k];
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}
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out[i] = -sum;
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out[i] = REF_SCALE(-sum, nbits - 2);
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}
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}
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/* NOTE: no normalisation by 1 / N is done */
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static void mdct_ref(float *output, float *input, int nbits)
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static void mdct_ref(FFTSample *output, FFTSample *input, int nbits)
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{
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int n = 1<<nbits;
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int k, i;
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@ -128,10 +142,11 @@ static void mdct_ref(float *output, float *input, int nbits)
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a = (2*M_PI*(2*i+1+n/2)*(2*k+1) / (4 * n));
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s += input[i] * cos(a);
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}
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output[k] = s;
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output[k] = REF_SCALE(s, nbits - 1);
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}
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}
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#if CONFIG_FFT_FLOAT
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static void idct_ref(float *output, float *input, int nbits)
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{
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int n = 1<<nbits;
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@ -164,11 +179,12 @@ static void dct_ref(float *output, float *input, int nbits)
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output[k] = s;
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}
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}
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#endif
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static float frandom(AVLFG *prng)
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static FFTSample frandom(AVLFG *prng)
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{
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return (int16_t)av_lfg_get(prng) / 32768.0;
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return (int16_t)av_lfg_get(prng) / 32768.0 * RANGE;
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}
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static int64_t gettime(void)
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@ -178,7 +194,7 @@ static int64_t gettime(void)
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return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
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}
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static int check_diff(float *tab1, float *tab2, int n, double scale)
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static int check_diff(FFTSample *tab1, FFTSample *tab2, int n, double scale)
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{
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int i;
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double max= 0;
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@ -186,9 +202,9 @@ static int check_diff(float *tab1, float *tab2, int n, double scale)
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int err = 0;
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for (i = 0; i < n; i++) {
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double e= fabsf(tab1[i] - (tab2[i] / scale));
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double e = fabsf(tab1[i] - (tab2[i] / scale)) / RANGE;
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if (e >= 1e-3) {
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av_log(NULL, AV_LOG_ERROR, "ERROR %5d: %10.6f %10.6f\n",
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av_log(NULL, AV_LOG_ERROR, "ERROR %5d: "FMT" "FMT"\n",
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i, tab1[i], tab2[i]);
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err = 1;
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}
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@ -233,8 +249,10 @@ int main(int argc, char **argv)
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int do_inverse = 0;
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FFTContext s1, *s = &s1;
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FFTContext m1, *m = &m1;
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#if CONFIG_FFT_FLOAT
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RDFTContext r1, *r = &r1;
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DCTContext d1, *d = &d1;
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#endif
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int fft_nbits, fft_size, fft_size_2;
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double scale = 1.0;
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AVLFG prng;
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@ -297,6 +315,7 @@ int main(int argc, char **argv)
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ff_fft_init(s, fft_nbits, do_inverse);
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fft_ref_init(fft_nbits, do_inverse);
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break;
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#if CONFIG_FFT_FLOAT
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case TRANSFORM_RDFT:
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if (do_inverse)
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av_log(NULL, AV_LOG_INFO,"IDFT_C2R");
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@ -312,6 +331,10 @@ int main(int argc, char **argv)
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av_log(NULL, AV_LOG_INFO,"DCT_II");
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ff_dct_init(d, fft_nbits, do_inverse ? DCT_III : DCT_II);
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break;
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#endif
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default:
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av_log(NULL, AV_LOG_ERROR, "Requested transform not supported\n");
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return 1;
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}
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av_log(NULL, AV_LOG_INFO," %d test\n", fft_size);
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@ -328,15 +351,15 @@ int main(int argc, char **argv)
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switch (transform) {
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case TRANSFORM_MDCT:
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if (do_inverse) {
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imdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);
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m->imdct_calc(m, tab2, (float *)tab1);
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err = check_diff((float *)tab_ref, tab2, fft_size, scale);
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imdct_ref((FFTSample *)tab_ref, (FFTSample *)tab1, fft_nbits);
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m->imdct_calc(m, tab2, (FFTSample *)tab1);
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err = check_diff((FFTSample *)tab_ref, tab2, fft_size, scale);
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} else {
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mdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);
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mdct_ref((FFTSample *)tab_ref, (FFTSample *)tab1, fft_nbits);
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m->mdct_calc(m, tab2, (float *)tab1);
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m->mdct_calc(m, tab2, (FFTSample *)tab1);
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err = check_diff((float *)tab_ref, tab2, fft_size / 2, scale);
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err = check_diff((FFTSample *)tab_ref, tab2, fft_size / 2, scale);
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}
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break;
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case TRANSFORM_FFT:
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@ -345,8 +368,9 @@ int main(int argc, char **argv)
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s->fft_calc(s, tab);
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fft_ref(tab_ref, tab1, fft_nbits);
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err = check_diff((float *)tab_ref, (float *)tab, fft_size * 2, 1.0);
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err = check_diff((FFTSample *)tab_ref, (FFTSample *)tab, fft_size * 2, 1.0);
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break;
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#if CONFIG_FFT_FLOAT
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case TRANSFORM_RDFT:
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if (do_inverse) {
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tab1[ 0].im = 0;
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@ -387,6 +411,7 @@ int main(int argc, char **argv)
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}
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err = check_diff((float *)tab_ref, (float *)tab, fft_size, 1.0);
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break;
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#endif
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}
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/* do a speed test */
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@ -404,15 +429,16 @@ int main(int argc, char **argv)
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switch (transform) {
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case TRANSFORM_MDCT:
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if (do_inverse) {
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m->imdct_calc(m, (float *)tab, (float *)tab1);
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m->imdct_calc(m, (FFTSample *)tab, (FFTSample *)tab1);
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} else {
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m->mdct_calc(m, (float *)tab, (float *)tab1);
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m->mdct_calc(m, (FFTSample *)tab, (FFTSample *)tab1);
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}
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break;
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case TRANSFORM_FFT:
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memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
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s->fft_calc(s, tab);
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break;
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#if CONFIG_FFT_FLOAT
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case TRANSFORM_RDFT:
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memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
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r->rdft_calc(r, tab2);
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@ -421,6 +447,7 @@ int main(int argc, char **argv)
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memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
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d->dct_calc(d, tab2);
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break;
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#endif
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}
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}
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duration = gettime() - time_start;
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@ -441,12 +468,14 @@ int main(int argc, char **argv)
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case TRANSFORM_FFT:
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ff_fft_end(s);
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break;
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#if CONFIG_FFT_FLOAT
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case TRANSFORM_RDFT:
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ff_rdft_end(r);
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break;
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case TRANSFORM_DCT:
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ff_dct_end(d);
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break;
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#endif
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}
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av_free(tab);
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