source: src/spectral/filterbank.h @ 06cae6c

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 06cae6c was 06cae6c, checked in by Paul Brossier <piem@piem.org>, 11 years ago

src/spectral/filterbank.c: refactorise filter bank, split mel frequency coefficients to src/spectral/filterbank_mel.c, start bumping license to GPLv3

  • Property mode set to 100644
File size: 1.9 KB
RevLine 
[88199ce]1/*
[06cae6c]2  Copyright (C) 2007-2009 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
[88199ce]20*/
21
[8708556]22/** \file
23
24  Filterbank object
25
[06cae6c]26  General-purpose spectral filterbank object.
[8708556]27
28*/
29
[73eaa2e]30#ifndef FILTERBANK_H
31#define FILTERBANK_H
[88199ce]32
[7c6c806]33#ifdef __cplusplus
34extern "C" {
35#endif
36
[2d8cffa]37/** filterbank object */
[8708556]38typedef struct aubio_filterbank_t_ aubio_filterbank_t;
39
40/** create filterbank object
41
42  \param win_s size of analysis buffer (and length the FFT transform)
43  \param n_filters number of filters to create
44
45*/
46
47aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s);
48
[b276dee]49/** destroy filterbank object
50
51  \param fb filterbank, as returned by new_aubio_filterbank method
52
53*/
54void del_aubio_filterbank(aubio_filterbank_t * fb);
55
56/** compute filterbank
57
[06cae6c]58  \param fb filterbank containing     nfilt x win_s filter coefficients
59  \param in input spectrum containing chans x win_s spectrum
60  \param out output vector containing chans x nfilt output values
61
[b276dee]62*/
63void aubio_filterbank_do(aubio_filterbank_t * fb, cvec_t * in, fvec_t *out);
[7c6c806]64
[06cae6c]65/** return a pointer to the fvec object containing all filter coefficients
66
67  \param f filterbank object to get coefficients from
[17961b0]68
69 */
[06cae6c]70fvec_t * aubio_filterbank_get_coeffs(aubio_filterbank_t * f);
[17961b0]71
[7c6c806]72#ifdef __cplusplus
73}
74#endif
[88199ce]75
[73eaa2e]76#endif // FILTERBANK_H
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