aubio 0.4.7

spectral/test-dct.c
#include <math.h>
#include "aubio.h"
#include "utils_tests.h"
int main (void)
{
int return_code = 0;
uint_t win_s = 32; // window size
uint_t i, j, n_iters = 10; // number of iterations
// create dct object
aubio_dct_t * dct = new_aubio_dct(win_s);
fvec_t * in = new_fvec (win_s); // input buffer
fvec_t * dctout = new_fvec (win_s); // output buffer
fvec_t * out = new_fvec (win_s); // input buffer
if (!dct || !in || !dctout) {
return_code = 1;
return return_code;
}
in->data[0] = 1.;
for (i = 0; i < n_iters; i++) {
aubio_dct_do (dct, in, dctout);
aubio_dct_rdo (dct, dctout, out);
for (j = 0; j < in->length; j++) {
if (fabsf(in->data[j] - out->data[j]) > 10.e-4) {
fprintf(stderr, "dct reconstruction failed\n");
}
}
}
fvec_print(in);
fvec_print(dctout);
fvec_print(out);
del_fvec(dctout);
del_fvec(in);
del_fvec(out);
del_aubio_dct(dct);
return return_code;
}