ref: fce58d9e922e2ffdc979531af4302583f16ae2b4
dir: /src/spectral/mfcc.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.
*/
/* part of this mfcc implementation were inspired from LibXtract
http://libxtract.sourceforge.net/
*/
#ifndef MFCC_H
#define MFCC_H
#ifdef __cplusplus
extern "C" {
#endif
typedef struct aubio_mfcc_t_ aubio_mfcc_t;
/** create mfcc object
\param win_s size of analysis buffer (and length the FFT transform)
\param samplerate
\param n_coefs: number of desired coefs
\param lowfreq: lowest frequency to use in filterbank
\param highfreq highest frequency to use in filterbank
\param channels number of channels
*/
aubio_mfcc_t * new_aubio_mfcc (uint_t win_s, uint_t samplerate, uint_t n_filters, uint_t n_coefs, smpl_t lowfreq, smpl_t highfreq, uint_t channels);
/** delete mfcc object
\param mf mfcc object as returned by new_aubio_mfcc
*/
void del_aubio_mfcc(aubio_mfcc_t *mf);
/** mfcc object processing
\param mf mfcc object as returned by new_aubio_mfcc
\param in input spectrum (win_s long)
\param out output mel coefficients buffer (n_filters/2 +1 long)
*/
void aubio_mfcc_do(aubio_mfcc_t * mf, cvec_t *in, fvec_t *out);
#ifdef __cplusplus
}
#endif
#endif // MFCC_H