ref: 986131d13a247a071d4450fd0411aa43a9e67141
dir: /src/spectral/mfcc.h/
/*
Copyright (C) 2007-2013 Paul Brossier <piem@aubio.org>
and Amaury Hazan <ahazan@iua.upf.edu>
This file is part of aubio.
aubio 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 3 of the License, or
(at your option) any later version.
aubio 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 aubio. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
Mel-Frequency Cepstrum Coefficients object
This object computes MFCC coefficients on an input cvec_t.
The implementation follows the specifications established by Malcolm Slaney
in its Auditory Toolbox, available online (see file mfcc.m).
http://engineering.ecn.purdue.edu/~malcolm/interval/1998-010/
\example spectral/test-mfcc.c
*/
#ifndef AUBIO_MFCC_H
#define AUBIO_MFCC_H
#ifdef __cplusplus
extern "C"
{
#endif
/** mfcc object */
typedef struct _aubio_mfcc_t aubio_mfcc_t;
/** create mfcc object
\param buf_size size of analysis buffer (and length the FFT transform)
\param samplerate audio sampling rate
\param n_coeffs number of desired coefficients
\param n_filters number of desired filters
*/
aubio_mfcc_t *new_aubio_mfcc (uint_t buf_size,
uint_t n_filters, uint_t n_coeffs, uint_t samplerate);
/** 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 (buf_size long)
\param out output mel coefficients buffer (n_coeffs long)
*/
void aubio_mfcc_do (aubio_mfcc_t * mf, const cvec_t * in, fvec_t * out);
#ifdef __cplusplus
}
#endif
#endif /* AUBIO_MFCC_H */