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Changed every_n_samples in fft_fc to be based on actual input samples

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Tatu Peltola 2016-10-31 19:14:16 +02:00
parent 1446b62959
commit b6f50cbf06
1 changed files with 4 additions and 7 deletions
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11
csdr.c
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@ -1366,13 +1366,11 @@ int main(int argc, char *argv[])
if(!strcmp(argv[1],"fft_fc")) if(!strcmp(argv[1],"fft_fc"))
{ {
/* For real FFT, the parameter is the number of output complex bins /*
For real FFT, the parameter is the number of output complex bins
instead of the actual FFT size. instead of the actual FFT size.
Thus, the number of input samples used for each FFT is twice the given parameter Number of input samples used for each FFT is twice the given parameter.
and for this reason, out_of_every_n_samples is also doubled This makes it easier to replace fft_cc by fft_fc in some applications. */
to get correct amount of overlap.
This is not very neat but makes it easier to replace fft_cc by fft_fc
in some applications. */
if(argc<=3) return badsyntax("need required parameters (fft_out_size, out_of_every_n_samples)"); if(argc<=3) return badsyntax("need required parameters (fft_out_size, out_of_every_n_samples)");
int fft_in_size=0, fft_out_size=0; int fft_in_size=0, fft_out_size=0;
sscanf(argv[2],"%d",&fft_out_size); sscanf(argv[2],"%d",&fft_out_size);
@ -1380,7 +1378,6 @@ int main(int argc, char *argv[])
fft_in_size = 2*fft_out_size; fft_in_size = 2*fft_out_size;
int every_n_samples; int every_n_samples;
sscanf(argv[3],"%d",&every_n_samples); sscanf(argv[3],"%d",&every_n_samples);
every_n_samples *= 2;
int benchmark=0; int benchmark=0;
int octave=0; int octave=0;
window_t window = WINDOW_DEFAULT; window_t window = WINDOW_DEFAULT;