ref: e2337ba9e22eb91fb1f49344f4e07f4c725837c1
dir: /src/filterbank.c/
/*
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.
*/
/* part of this mfcc implementation were inspired from LibXtract
http://libxtract.sourceforge.net/
*/
#include "aubio_priv.h"
#include "filterbank.h"
/** \brief A structure to store a set of n_filters filters of lenghts win_s */
struct aubio_filterbank_t_ {
uint_t win_s;
uint_t n_filters;
fvec_t *filters;
};
aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s){
/** allocating space for filterbank object */
aubio_filterbank_t * fb = AUBIO_NEW(aubio_filterbank_t);
uint_t filter_cnt;
fb->win_s=win_s;
fb->n_filters=n_filters;
/** allocating filter tables */
fb->filters=AUBIO_ARRAY(n_filters,fvec_t);
for (filter_cnt=0; filter_cnt<n_filters; filter_cnt++)
/* considering one-channel filters */
filters[filter_cnt]=new_fvec(win_s, 1);
}
void del_aubio_filterbank(aubio_filterbank_t * fb){
int filter_cnt;
/** deleting filter tables first */
for (filter_cnt=0; filter_cnt<fb->n_filters; filter_cnt++)
del_fvec(fb->filters[filter_cnt]);
AUBIO_FREE(fb->filters);
AUBIO_FREE(fb);
}