source: src/biquad.h @ 96fb8ad

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 96fb8ad was 96fb8ad, checked in by Paul Brossier <piem@altern.org>, 19 years ago

import 0.1.7.1

  • Property mode set to 100644
File size: 1.2 KB
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1/*
2         Copyright (C) 2003 Paul Brossier
3
4         This program is free software; you can redistribute it and/or modify
5         it under the terms of the GNU General Public License as published by
6         the Free Software Foundation; either version 2 of the License, or
7         (at your option) any later version.
8
9         This program is distributed in the hope that it will be useful,
10         but WITHOUT ANY WARRANTY; without even the implied warranty of
11         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12         GNU General Public License for more details.
13
14         You should have received a copy of the GNU General Public License
15         along with this program; if not, write to the Free Software
16         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18*/
19
20#ifndef BIQUAD_H
21#define BIQUAD_H
22
23/** \file
24 * biquad filter
25 *
26 * \f$ y[n] = b_1 x[n] + b_2 x[n-1] + b_3 x[n-2] -
27 *      a_2 y[n-1] - a_3 y[n-2] \f$
28 */
29
30#ifdef __cplusplus
31extern "C" {
32#endif
33
34typedef struct _aubio_biquad_t aubio_biquad_t;
35
36void aubio_biquad_do(aubio_biquad_t * b, fvec_t * in);
37void aubio_biquad_do_filtfilt(aubio_biquad_t * b, fvec_t * in, fvec_t * tmp);
38aubio_biquad_t * new_aubio_biquad(lsmp_t b1, lsmp_t b2, lsmp_t b3, lsmp_t a2, lsmp_t a3);
39
40#ifdef __cplusplus
41}
42#endif
43
44#endif /*BIQUAD_H*/
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