1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*
Copyright (C) 2003-2013 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
aubio is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
Pitch detection using multiple-comb filter
This fundamental frequency estimation algorithm implements spectral
flattening, multi-comb filtering and peak histogramming.
This method was designed by Juan P. Bello and described in:
Juan-Pablo Bello. ``Towards the Automated Analysis of Simple Polyphonic
Music''. PhD thesis, Centre for Digital Music, Queen Mary University of
London, London, UK, 2003.
\example pitch/test-pitchmcomb.c
*/
#ifndef AUBIO_PITCHMCOMB_H
#define AUBIO_PITCHMCOMB_H
#ifdef __cplusplus
extern "C" {
#endif
/** pitch detection object */
typedef struct _aubio_pitchmcomb_t aubio_pitchmcomb_t;
/** execute pitch detection on an input spectral frame
\param p pitch detection object as returned by new_aubio_pitchmcomb
\param in_fftgrain input signal spectrum as computed by aubio_pvoc_do
\param out_cands pitch candidate frequenciess, in bins
*/
void aubio_pitchmcomb_do (aubio_pitchmcomb_t * p, const cvec_t * in_fftgrain,
fvec_t * out_cands);
/** creation of the pitch detection object
\param buf_size size of the input buffer to analyse
\param hop_size step size between two consecutive analysis instant
*/
aubio_pitchmcomb_t *new_aubio_pitchmcomb (uint_t buf_size, uint_t hop_size);
/** deletion of the pitch detection object
\param p pitch detection object as returned by new_aubio_pitchfcomb
*/
void del_aubio_pitchmcomb (aubio_pitchmcomb_t * p);
#ifdef __cplusplus
}
#endif
#endif /* AUBIO_PITCHMCOMB_H */
|
