/usr/include/aubio/spectral/mfcc.h is in libaubio-dev 0.4.1-2build4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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
\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, cvec_t * in, fvec_t * out);
#ifdef __cplusplus
}
#endif
#endif /* _AUBIO_MFCC_H */
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