aubio: temporal/test-biquad.c

aubio 0.4.9

temporal/test-biquad.c
#include <aubio.h>
int main (void)
{
uint_t win_s = 64; // window size
// create biquad filter with `b0`, `b1`, `b2`, `a1`, `a2`
aubio_filter_t * o = new_aubio_filter_biquad(0.3,0.2,0.1,0.2,0.3);
fvec_t * in_vec = new_fvec (win_s); // input buffer
fvec_t * tmp_vec = new_fvec (win_s); // temporary buffer
fvec_t * out_vec = new_fvec (win_s); // output buffer
uint_t times = 100;
while ( times-- ) {
// copy to out, then filter out
aubio_filter_do_outplace(o, in_vec, out_vec);
// in-place filtering
aubio_filter_do(o, in_vec);
// in-place filtering
aubio_filter_do_filtfilt(o, in_vec, out_vec);
fvec_print(in_vec);
}
// memory clean-up, one for each new
del_aubio_filter(o);
del_fvec(in_vec);
del_fvec(tmp_vec);
del_fvec(out_vec);
return 0;
}