source: src/pitch/pitchschmitt.h @ f162cf9

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since f162cf9 was f162cf9, checked in by Paul Brossier <piem@piem.org>, 14 years ago

src/pitch/pitchschmitt.c: remove unneeded samplerate parameter, update prototypes, make multichannel

  • Property mode set to 100644
File size: 1.9 KB
Line 
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/** \file
21
22   Pitch detection using a Schmitt trigger
23 
24   This pitch extraction method implements a Schmitt trigger to estimate the
25   period of a signal.
26
27   This file was derived from the tuneit project, written by Mario Lang to
28   detect the fundamental frequency of a sound.
29   
30   see http://delysid.org/tuneit.html
31
32*/
33
34#ifndef _PITCHSCHMITT_H
35#define _PITCHSCHMITT_H
36
37#ifdef __cplusplus
38extern "C" {
39#endif
40
41/** pitch detection object */
42typedef struct _aubio_pitchschmitt_t aubio_pitchschmitt_t;
43
44/** execute pitch detection on an input buffer
45 
46  \param p pitch detection object as returned by new_aubio_pitchschmitt
47  \param input input signal window (length as specified at creation time)
48  \param output pitch period estimates, in samples
49 
50*/
51void aubio_pitchschmitt_do (aubio_pitchschmitt_t *p, fvec_t * input, fvec_t * output);
52/** creation of the pitch detection object
53 
54  \param size size of the input buffer to analyse
55 
56*/
57aubio_pitchschmitt_t * new_aubio_pitchschmitt (uint_t size);
58/** deletion of the pitch detection object
59 
60  \param p pitch detection object as returned by new_aubio_pitchschmitt
61 
62*/
63void del_aubio_pitchschmitt (aubio_pitchschmitt_t *p);
64
65
66#ifdef __cplusplus
67}
68#endif
69
70#endif /* _PITCHSCHMITT_H */
71
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