source: src/spectral/filterbank.h @ 7bf3dcb

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 7bf3dcb was 32d6958, checked in by Paul Brossier <piem@piem.org>, 12 years ago

src/: more moving and splitting

  • Property mode set to 100644
File size: 2.1 KB
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1/*
2   Copyright (C) 2007 Amaury Hazan <ahazan@iua.upf.edu>
3                  and Paul Brossier <piem@piem.org>
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18*/
19
20/** \file
21
22  Filterbank object
23
24  General-purpose spectral filterbank object. Comes with mel-filter initialization function.
25
26*/
27
28#ifndef FILTERBANK_H
29#define FILTERBANK_H
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35/** filterbank object */
36typedef struct aubio_filterbank_t_ aubio_filterbank_t;
37
38/** create filterbank object
39
40  \param win_s size of analysis buffer (and length the FFT transform)
41  \param n_filters number of filters to create
42
43*/
44
45aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s);
46
47/** filterbank initialization for mel filters
48
49 
50  \param n_filters number of filters
51  \param win_s window size
52  \param samplerate
53  \param freq_min lowest filter frequency
54  \param freq_max highest filter frequency
55
56*/
57aubio_filterbank_t * new_aubio_filterbank_mfcc(uint_t n_filters, uint_t win_s, uint_t samplerate, smpl_t freq_min, smpl_t freq_max);
58
59/** destroy filterbank object
60
61  \param fb filterbank, as returned by new_aubio_filterbank method
62
63*/
64void del_aubio_filterbank(aubio_filterbank_t * fb);
65
66/** compute filterbank
67
68*/
69void aubio_filterbank_do(aubio_filterbank_t * fb, cvec_t * in, fvec_t *out);
70
71/** return the vector containing the filter coefficients of one channel
72
73 */
74fvec_t * aubio_filterbank_getchannel(aubio_filterbank_t * f, uint_t channel);
75
76#ifdef __cplusplus
77}
78#endif
79
80#endif // FILTERBANK_H
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