aubio  0.4.0
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src/spectral/test-fft.c
#include <aubio.h>
int main ()
{
uint_t win_s = 8; // window size
fvec_t * in = new_fvec (win_s); // input buffer
cvec_t * fftgrain = new_cvec (win_s); // fft norm and phase
fvec_t * out = new_fvec (win_s); // output buffer
// create fft object
aubio_fft_t * fft = new_aubio_fft(win_s);
// fill input with some data
in->data[0] = 1;
in->data[1] = 2;
in->data[2] = 3;
in->data[3] = 4;
in->data[4] = 5;
in->data[5] = 6;
in->data[6] = 5;
in->data[7] = 6;
// execute stft
aubio_fft_do (fft,in,fftgrain);
cvec_print(fftgrain);
// execute inverse fourier transform
aubio_fft_rdo(fft,fftgrain,out);
// cleam up
fvec_print(out);
del_fvec(in);
del_cvec(fftgrain);
del_fvec(out);
return 0;
}