179 lines
4.7 KiB
C
179 lines
4.7 KiB
C
/* Copyright (c) 2008 Xiph.Org Foundation
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Written by Jean-Marc Valin */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include "stack_alloc.h"
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#include "kiss_fft.h"
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#include "mathops.h"
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#include "modes.h"
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#ifndef M_PI
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#define M_PI 3.141592653
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#endif
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int ret = 0;
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void check(kiss_fft_cpx * in,kiss_fft_cpx * out,int nfft,int isinverse)
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{
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int bin,k;
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double errpow=0,sigpow=0, snr;
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for (bin=0;bin<nfft;++bin) {
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double ansr = 0;
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double ansi = 0;
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double difr;
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double difi;
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for (k=0;k<nfft;++k) {
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double phase = -2*M_PI*bin*k/nfft;
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double re = cos(phase);
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double im = sin(phase);
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if (isinverse)
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im = -im;
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if (!isinverse)
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{
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re /= nfft;
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im /= nfft;
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}
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ansr += in[k].r * re - in[k].i * im;
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ansi += in[k].r * im + in[k].i * re;
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}
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/*printf ("%d %d ", (int)ansr, (int)ansi);*/
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difr = ansr - out[bin].r;
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difi = ansi - out[bin].i;
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errpow += difr*difr + difi*difi;
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sigpow += ansr*ansr+ansi*ansi;
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}
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snr = 10*log10(sigpow/errpow);
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printf("nfft=%d inverse=%d,snr = %f\n",nfft,isinverse,snr );
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if (snr<60) {
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printf( "** poor snr: %f ** \n", snr);
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ret = 1;
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}
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}
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void test1d(int nfft,int isinverse,int arch)
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{
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size_t buflen = sizeof(kiss_fft_cpx)*nfft;
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kiss_fft_cpx *in;
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kiss_fft_cpx *out;
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int k;
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#ifdef CUSTOM_MODES
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kiss_fft_state *cfg = opus_fft_alloc(nfft,0,0,arch);
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#else
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int id;
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const kiss_fft_state *cfg;
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CELTMode *mode = opus_custom_mode_create(48000, 960, NULL);
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if (nfft == 480) id = 0;
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else if (nfft == 240) id = 1;
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else if (nfft == 120) id = 2;
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else if (nfft == 60) id = 3;
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else return;
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cfg = mode->mdct.kfft[id];
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#endif
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in = (kiss_fft_cpx*)malloc(buflen);
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out = (kiss_fft_cpx*)malloc(buflen);
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for (k=0;k<nfft;++k) {
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in[k].r = (rand() % 32767) - 16384;
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in[k].i = (rand() % 32767) - 16384;
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}
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for (k=0;k<nfft;++k) {
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in[k].r *= 32768;
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in[k].i *= 32768;
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}
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if (isinverse)
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{
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for (k=0;k<nfft;++k) {
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in[k].r /= nfft;
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in[k].i /= nfft;
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}
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}
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/*for (k=0;k<nfft;++k) printf("%d %d ", in[k].r, in[k].i);printf("\n");*/
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if (isinverse)
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opus_ifft(cfg,in,out, arch);
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else
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opus_fft(cfg,in,out, arch);
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/*for (k=0;k<nfft;++k) printf("%d %d ", out[k].r, out[k].i);printf("\n");*/
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check(in,out,nfft,isinverse);
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free(in);
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free(out);
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#ifdef CUSTOM_MODES
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opus_fft_free(cfg, arch);
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#endif
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}
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int main(int argc,char ** argv)
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{
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ALLOC_STACK;
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int arch = opus_select_arch();
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if (argc>1) {
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int k;
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for (k=1;k<argc;++k) {
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test1d(atoi(argv[k]),0,arch);
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test1d(atoi(argv[k]),1,arch);
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}
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}else{
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test1d(32,0,arch);
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test1d(32,1,arch);
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test1d(128,0,arch);
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test1d(128,1,arch);
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test1d(256,0,arch);
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test1d(256,1,arch);
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#ifndef RADIX_TWO_ONLY
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test1d(36,0,arch);
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test1d(36,1,arch);
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test1d(50,0,arch);
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test1d(50,1,arch);
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test1d(60,0,arch);
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test1d(60,1,arch);
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test1d(120,0,arch);
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test1d(120,1,arch);
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test1d(240,0,arch);
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test1d(240,1,arch);
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test1d(480,0,arch);
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test1d(480,1,arch);
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#endif
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}
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return ret;
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}
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