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Mark Borgerding 2003-08-09 13:12:56 +00:00
parent ccbc48dc63
commit db556661ed
2 changed files with 8 additions and 10 deletions
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2
Makefile
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@ -1,5 +1,5 @@
all: kiss_fft_s kiss_fft_f kiss_fft_d freqpeak tones all: kiss_fft_s kiss_fft_f kiss_fft_d freqpeak tones testsig
kiss_fft_s: kiss_fft.h kiss_fft.c kiss_fft_s: kiss_fft.h kiss_fft.c
gcc -Wall -O3 -o kiss_fft_s -DFIXED_POINT -DFFT_UTIL kiss_fft.c -lm gcc -Wall -O3 -o kiss_fft_s -DFIXED_POINT -DFFT_UTIL kiss_fft.c -lm

8
freqpeak.c
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@ -28,15 +28,11 @@ int main(int argc, char ** argv)
memset( rmag2 , 0 , sizeof(rmag2) ); memset( rmag2 , 0 , sizeof(rmag2) );
while ( fread( sampsin , sizeof(short) * 2*NFFT, 1 , stdin ) == 1 ) { while ( fread( sampsin , sizeof(short) * 2*NFFT, 1 , stdin ) == 1 ) {
//perform two ffts in parallel by packing the channels into the real and imaginary
//
//perform two ffts in parallel by packing the left&right channels into the real and imaginary
for (k=0;k<NFFT;++k) { for (k=0;k<NFFT;++k) {
//cbuf[k].r = 0;
//cbuf[k].i = 0;
cbuf[k].r = sampsin[2*k]; cbuf[k].r = sampsin[2*k];
cbuf[k].i = sampsin[2*k+1]; cbuf[k].i = sampsin[2*k+1];
//cbuf[k].i = sampsin[2*k+1];
} }
if (removedc) { if (removedc) {
@ -54,8 +50,10 @@ int main(int argc, char ** argv)
} }
} }
// perform the fft on the L+R packed buffer
kiss_fft( st , cbuf ); kiss_fft( st , cbuf );
// get the half-symmetric FFTs for the Left and Right Channels
for (k=0;k<NFFT/2;++k) { for (k=0;k<NFFT/2;++k) {
int k2 = (NFFT-k)%NFFT; int k2 = (NFFT-k)%NFFT;
kiss_fft_cpx r,l; kiss_fft_cpx r,l;