Chris@69: /* Copyright (c) 2008 Xiph.Org Foundation
Chris@69:    Written by Jean-Marc Valin */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #ifdef HAVE_CONFIG_H
Chris@69: #include "config.h"
Chris@69: #endif
Chris@69: 
Chris@69: #include <stdio.h>
Chris@69: 
Chris@69: #include "stack_alloc.h"
Chris@69: #include "kiss_fft.h"
Chris@69: #include "mathops.h"
Chris@69: #include "modes.h"
Chris@69: 
Chris@69: #ifndef M_PI
Chris@69: #define M_PI 3.141592653
Chris@69: #endif
Chris@69: 
Chris@69: int ret = 0;
Chris@69: 
Chris@69: void check(kiss_fft_cpx  * in,kiss_fft_cpx  * out,int nfft,int isinverse)
Chris@69: {
Chris@69:     int bin,k;
Chris@69:     double errpow=0,sigpow=0, snr;
Chris@69: 
Chris@69:     for (bin=0;bin<nfft;++bin) {
Chris@69:         double ansr = 0;
Chris@69:         double ansi = 0;
Chris@69:         double difr;
Chris@69:         double difi;
Chris@69: 
Chris@69:         for (k=0;k<nfft;++k) {
Chris@69:             double phase = -2*M_PI*bin*k/nfft;
Chris@69:             double re = cos(phase);
Chris@69:             double im = sin(phase);
Chris@69:             if (isinverse)
Chris@69:                 im = -im;
Chris@69: 
Chris@69:             if (!isinverse)
Chris@69:             {
Chris@69:                re /= nfft;
Chris@69:                im /= nfft;
Chris@69:             }
Chris@69: 
Chris@69:             ansr += in[k].r * re - in[k].i * im;
Chris@69:             ansi += in[k].r * im + in[k].i * re;
Chris@69:         }
Chris@69:         /*printf ("%d %d ", (int)ansr, (int)ansi);*/
Chris@69:         difr = ansr - out[bin].r;
Chris@69:         difi = ansi - out[bin].i;
Chris@69:         errpow += difr*difr + difi*difi;
Chris@69:         sigpow += ansr*ansr+ansi*ansi;
Chris@69:     }
Chris@69:     snr = 10*log10(sigpow/errpow);
Chris@69:     printf("nfft=%d inverse=%d,snr = %f\n",nfft,isinverse,snr );
Chris@69:     if (snr<60) {
Chris@69:        printf( "** poor snr: %f ** \n", snr);
Chris@69:        ret = 1;
Chris@69:     }
Chris@69: }
Chris@69: 
Chris@69: void test1d(int nfft,int isinverse,int arch)
Chris@69: {
Chris@69:     size_t buflen = sizeof(kiss_fft_cpx)*nfft;
Chris@69:     kiss_fft_cpx *in;
Chris@69:     kiss_fft_cpx *out;
Chris@69:     int k;
Chris@69: #ifdef CUSTOM_MODES
Chris@69:     kiss_fft_state *cfg = opus_fft_alloc(nfft,0,0,arch);
Chris@69: #else
Chris@69:     int id;
Chris@69:     const kiss_fft_state *cfg;
Chris@69:     CELTMode *mode = opus_custom_mode_create(48000, 960, NULL);
Chris@69:     if (nfft == 480) id = 0;
Chris@69:     else if (nfft == 240) id = 1;
Chris@69:     else if (nfft == 120) id = 2;
Chris@69:     else if (nfft == 60) id = 3;
Chris@69:     else return;
Chris@69:     cfg = mode->mdct.kfft[id];
Chris@69: #endif
Chris@69: 
Chris@69:     in = (kiss_fft_cpx*)malloc(buflen);
Chris@69:     out = (kiss_fft_cpx*)malloc(buflen);
Chris@69: 
Chris@69:     for (k=0;k<nfft;++k) {
Chris@69:         in[k].r = (rand() % 32767) - 16384;
Chris@69:         in[k].i = (rand() % 32767) - 16384;
Chris@69:     }
Chris@69: 
Chris@69:     for (k=0;k<nfft;++k) {
Chris@69:        in[k].r *= 32768;
Chris@69:        in[k].i *= 32768;
Chris@69:     }
Chris@69: 
Chris@69:     if (isinverse)
Chris@69:     {
Chris@69:        for (k=0;k<nfft;++k) {
Chris@69:           in[k].r /= nfft;
Chris@69:           in[k].i /= nfft;
Chris@69:        }
Chris@69:     }
Chris@69: 
Chris@69:     /*for (k=0;k<nfft;++k) printf("%d %d ", in[k].r, in[k].i);printf("\n");*/
Chris@69: 
Chris@69:     if (isinverse)
Chris@69:        opus_ifft(cfg,in,out, arch);
Chris@69:     else
Chris@69:        opus_fft(cfg,in,out, arch);
Chris@69: 
Chris@69:     /*for (k=0;k<nfft;++k) printf("%d %d ", out[k].r, out[k].i);printf("\n");*/
Chris@69: 
Chris@69:     check(in,out,nfft,isinverse);
Chris@69: 
Chris@69:     free(in);
Chris@69:     free(out);
Chris@69: #ifdef CUSTOM_MODES
Chris@69:     opus_fft_free(cfg, arch);
Chris@69: #endif
Chris@69: }
Chris@69: 
Chris@69: int main(int argc,char ** argv)
Chris@69: {
Chris@69:     ALLOC_STACK;
Chris@69:     int arch = opus_select_arch();
Chris@69: 
Chris@69:     if (argc>1) {
Chris@69:         int k;
Chris@69:         for (k=1;k<argc;++k) {
Chris@69:             test1d(atoi(argv[k]),0,arch);
Chris@69:             test1d(atoi(argv[k]),1,arch);
Chris@69:         }
Chris@69:     }else{
Chris@69:         test1d(32,0,arch);
Chris@69:         test1d(32,1,arch);
Chris@69:         test1d(128,0,arch);
Chris@69:         test1d(128,1,arch);
Chris@69:         test1d(256,0,arch);
Chris@69:         test1d(256,1,arch);
Chris@69: #ifndef RADIX_TWO_ONLY
Chris@69:         test1d(36,0,arch);
Chris@69:         test1d(36,1,arch);
Chris@69:         test1d(50,0,arch);
Chris@69:         test1d(50,1,arch);
Chris@69:         test1d(60,0,arch);
Chris@69:         test1d(60,1,arch);
Chris@69:         test1d(120,0,arch);
Chris@69:         test1d(120,1,arch);
Chris@69:         test1d(240,0,arch);
Chris@69:         test1d(240,1,arch);
Chris@69:         test1d(480,0,arch);
Chris@69:         test1d(480,1,arch);
Chris@69: #endif
Chris@69:     }
Chris@69:     return ret;
Chris@69: }