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little better, faster

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This commit is contained in:
Mark Borgerding 2003-12-09 01:19:08 +00:00
parent 09dbf36e97
commit db56a8b1e2
1 changed files with 28 additions and 1 deletions
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29
test/test_real.c
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@ -1,5 +1,12 @@
#include "kiss_fft.h"
#include <sys/time.h>
static double timesnap()
{
struct timeval tv;
gettimeofday(&tv,NULL);
return (double)tv.tv_sec + (double)tv.tv_usec/1000000;
}
void * kiss_fftr_alloc(int nfft,int inverse_fft);
void kiss_fftr(const void * cfg,const kiss_fft_scalar *fin,kiss_fft_cpx *fout);
@ -32,7 +39,11 @@ double snr_compare( kiss_fft_cpx * vec1,kiss_fft_cpx * vec2, int n)
#ifndef RANDOM
#define NFFT 8
#else
#define NFFT 120
#define NFFT 1800
#endif
#ifndef NUMFFTS
#define NUMFFTS 1000
#endif
void pcpx(const char * msg, kiss_fft_cpx * c)
@ -42,6 +53,7 @@ void pcpx(const char * msg, kiss_fft_cpx * c)
int main()
{
double ts,tfft,trfft;
int i;
kiss_fft_cpx cin[NFFT];
kiss_fft_scalar sin[NFFT] = {0.309655,0.815653,0.768570,0.591841,0.404767,0.637617,0.007803,0.012665};
@ -69,6 +81,21 @@ int main()
printf( "nfft=%d, inverse=%d, snr=%g\n",
NFFT,inverse, snr_compare(cout,sout,NFFT/2) );
ts = timesnap();
for (i=0;i<NUMFFTS;++i) {
kiss_fft(kiss_fft_state,cin,cout);
}
tfft = timesnap() - ts;
ts = timesnap();
for (i=0;i<NUMFFTS;++i) {
kiss_fftr(kiss_fftr_state,sin,cout);
}
trfft = timesnap() - ts;
printf("%d complex ffts took %gs, real took %gs\n",NUMFFTS,tfft,trfft);
return 0;
}