ref: 651cac88d6cebcebc86b18cbec1efeb397190ade
dir: /src/spectral/filterbank.h/
/*
Copyright (C) 2007 Amaury Hazan <ahazan@iua.upf.edu>
and Paul Brossier <piem@piem.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** \file
Filterbank object
General-purpose spectral filterbank object. Comes with mel-filter initialization function.
*/
#ifndef FILTERBANK_H
#define FILTERBANK_H
#ifdef __cplusplus
extern "C" {
#endif
/** filterbank object */
typedef struct aubio_filterbank_t_ aubio_filterbank_t;
/** create filterbank object
\param win_s size of analysis buffer (and length the FFT transform)
\param n_filters number of filters to create
*/
aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s);
/** filterbank initialization for mel filters
\param n_filters number of filters
\param win_s window size
\param samplerate
\param freq_min lowest filter frequency
\param freq_max highest filter frequency
*/
aubio_filterbank_t * new_aubio_filterbank_mfcc(uint_t n_filters, uint_t win_s, uint_t samplerate, smpl_t freq_min, smpl_t freq_max);
/** destroy filterbank object
\param fb filterbank, as returned by new_aubio_filterbank method
*/
void del_aubio_filterbank(aubio_filterbank_t * fb);
/** compute filterbank
*/
void aubio_filterbank_do(aubio_filterbank_t * fb, cvec_t * in, fvec_t *out);
/** return the vector containing the filter coefficients of one channel
*/
fvec_t * aubio_filterbank_getchannel(aubio_filterbank_t * f, uint_t channel);
#ifdef __cplusplus
}
#endif
#endif // FILTERBANK_H