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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include "mdct.h"
#define CELT_C
#include "../libcelt/stack_alloc.h"
#include "../libcelt/kiss_fft.c"
#include "../libcelt/mdct.c"
#ifndef M_PI
#define M_PI 3.141592653
#endif
#ifdef FIXED_DEBUG
long long celt_mips=0;
#endif
int ret = 0;
void check(kiss_fft_scalar * in,kiss_fft_scalar * out,int nfft,int isinverse)
{
int bin,k;
double errpow=0,sigpow=0;
double snr;
for (bin=0;bin<nfft/2;++bin) {
double ansr = 0;
double difr;
for (k=0;k<nfft;++k) {
double phase = 2*M_PI*(k+.5+.25*nfft)*(bin+.5)/nfft;
double re = cos(phase);
re /= nfft/4;
ansr += in[k] * re;
}
/*printf ("%f %f\n", ansr, out[bin]);*/
difr = ansr - out[bin];
errpow += difr*difr;
sigpow += ansr*ansr;
}
snr = 10*log10(sigpow/errpow);
printf("nfft=%d inverse=%d,snr = %f\n",nfft,isinverse,snr );
if (snr<60) {
printf( "** poor snr: %f **\n", snr);
ret = 1;
}
}
void check_inv(kiss_fft_scalar * in,kiss_fft_scalar * out,int nfft,int isinverse)
{
int bin,k;
double errpow=0,sigpow=0;
double snr;
for (bin=0;bin<nfft;++bin) {
double ansr = 0;
double difr;
for (k=0;k<nfft/2;++k) {
double phase = 2*M_PI*(bin+.5+.25*nfft)*(k+.5)/nfft;
double re = cos(phase);
//re *= 2;
ansr += in[k] * re;
}
/*printf ("%f %f\n", ansr, out[bin]);*/
difr = ansr - out[bin];
errpow += difr*difr;
sigpow += ansr*ansr;
}
snr = 10*log10(sigpow/errpow);
printf("nfft=%d inverse=%d,snr = %f\n",nfft,isinverse,snr );
if (snr<60) {
printf( "** poor snr: %f **\n", snr);
ret = 1;
}
}
void test1d(int nfft,int isinverse)
{
mdct_lookup cfg;
size_t buflen = sizeof(kiss_fft_scalar)*nfft;
kiss_fft_scalar * in = (kiss_fft_scalar*)malloc(buflen);
kiss_fft_scalar * out= (kiss_fft_scalar*)malloc(buflen);
celt_word16 * window= (celt_word16*)malloc(sizeof(celt_word16)*nfft/2);
int k;
clt_mdct_init(&cfg, nfft);
for (k=0;k<nfft;++k) {
in[k] = (rand() % 32768) - 16384;
}
for (k=0;k<nfft/2;++k) {
window[k] = Q15ONE;
}
#ifdef DOUBLE_PRECISION
for (k=0;k<nfft;++k) {
in[k] *= 32768;
}
#endif
if (isinverse)
{
for (k=0;k<nfft;++k) {
in[k] /= nfft;
}
}
/*for (k=0;k<nfft;++k) printf("%d %d ", in[k].r, in[k].i);printf("\n");*/
if (isinverse)
{
for (k=0;k<nfft;++k)
out[k] = 0;
clt_mdct_backward(&cfg,in,out, window, nfft/2);
check_inv(in,out,nfft,isinverse);
} else {
clt_mdct_forward(&cfg,in,out,window, nfft/2);
check(in,out,nfft,isinverse);
}
/*for (k=0;k<nfft;++k) printf("%d %d ", out[k].r, out[k].i);printf("\n");*/
free(in);
free(out);
clt_mdct_clear(&cfg);
}
int main(int argc,char ** argv)
{
ALLOC_STACK;
if (argc>1) {
int k;
for (k=1;k<argc;++k) {
test1d(atoi(argv[k]),0);
test1d(atoi(argv[k]),1);
}
}else{
test1d(32,0);
test1d(32,1);
test1d(256,0);
test1d(256,1);
test1d(512,0);
test1d(512,1);
#ifndef RADIX_TWO_ONLY
test1d(40,0);
test1d(40,1);
test1d(56,0);
test1d(56,1);
test1d(120,0);
test1d(120,1);
test1d(240,0);
test1d(240,1);
test1d(480,0);
test1d(480,1);
#endif
}
return ret;
}
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