source: src/spectral/mfcc.h @ 6f42c16

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 6f42c16 was 6f42c16, checked in by Paul Brossier <piem@piem.org>, 4 years ago

src/: change c header identifiers (see #35)

  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2  Copyright (C) 2007-2013 Paul Brossier <piem@aubio.org>
3                      and Amaury Hazan <ahazan@iua.upf.edu>
4
5  This file is part of aubio.
6
7  aubio is free software: you can redistribute it and/or modify
8  it under the terms of the GNU General Public License as published by
9  the Free Software Foundation, either version 3 of the License, or
10  (at your option) any later version.
11
12  aubio is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  GNU General Public License for more details.
16
17  You should have received a copy of the GNU General Public License
18  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
19
20*/
21
22/** \file
23
24  Mel-Frequency Cepstrum Coefficients object
25
26  This object computes MFCC coefficients on an input cvec_t.
27
28  The implementation follows the specifications established by Malcolm Slaney
29  in its Auditory Toolbox, available online (see file mfcc.m).
30
31  http://engineering.ecn.purdue.edu/~malcolm/interval/1998-010/
32
33  \example spectral/test-mfcc.c
34
35*/
36
37#ifndef AUBIO_MFCC_H
38#define AUBIO_MFCC_H
39
40#ifdef __cplusplus
41extern "C"
42{
43#endif
44
45/** mfcc object */
46typedef struct _aubio_mfcc_t aubio_mfcc_t;
47
48/** create mfcc object
49
50  \param buf_size size of analysis buffer (and length the FFT transform)
51  \param samplerate audio sampling rate
52  \param n_coeffs number of desired coefficients
53  \param n_filters number of desired filters
54
55*/
56aubio_mfcc_t *new_aubio_mfcc (uint_t buf_size,
57    uint_t n_filters, uint_t n_coeffs, uint_t samplerate);
58
59/** delete mfcc object
60
61  \param mf mfcc object as returned by new_aubio_mfcc
62
63*/
64void del_aubio_mfcc (aubio_mfcc_t * mf);
65
66/** mfcc object processing
67
68  \param mf mfcc object as returned by new_aubio_mfcc
69  \param in input spectrum (buf_size long)
70  \param out output mel coefficients buffer (n_coeffs long)
71
72*/
73void aubio_mfcc_do (aubio_mfcc_t * mf, const cvec_t * in, fvec_t * out);
74
75#ifdef __cplusplus
76}
77#endif
78
79#endif /* AUBIO_MFCC_H */
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