source: src/io/source.h @ 985a5d1

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 985a5d1 was 86cfdfa, checked in by Paul Brossier <piem@piem.org>, 12 years ago

src/io/source.h: add source_multi example
  • Property mode set to 100644
File size: 3.2 KB
Line 
1/*
2  Copyright (C) 2012-2013 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#ifndef _AUBIO_SOURCE_H
22#define _AUBIO_SOURCE_H
23
24/** \file
25
26  Media source to read blocks of consecutive audio samples from file
27
28  To write to file, use ::aubio_sink_t.
29
30  \example io/test-source.c
31  \example io/test-source_multi.c
32
33*/
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39/** media source object */
40typedef struct _aubio_source_t aubio_source_t;
41
42/**
43
44  create new ::aubio_source_t
45
46  \param uri the file path or uri to read from
47  \param samplerate sampling rate to view the fie at
48  \param hop_size the size of the blocks to read from
49
50  Creates a new source object. If `0` is passed as `samplerate`, the sample
51  rate of the original file is used.
52
53  The samplerate of newly created source can be obtained using
54  ::aubio_source_get_samplerate.
55
56*/
57aubio_source_t * new_aubio_source(char_t * uri, uint_t samplerate, uint_t hop_size);
58
59/**
60
61  read monophonic vector of length hop_size from source object
62
63  \param s source object, created with ::new_aubio_source
64  \param read_to ::fvec_t of data to read to
65  \param read upon returns, equals to number of frames actually read
66
67  Upon returns, `read` contains the number of frames actually read from the
68  source. `hop_size` if enough frames could be read, less otherwise.
69
70*/
71void aubio_source_do(aubio_source_t * s, fvec_t * read_to, uint_t * read);
72
73/**
74
75  read polyphonic vector of length hop_size from source object
76
77  \param s source object, created with ::new_aubio_source
78  \param read_to ::fmat_t of data to read to
79  \param read upon returns, equals to number of frames actually read
80
81  Upon returns, `read` contains the number of frames actually read from the
82  source. `hop_size` if enough frames could be read, less otherwise.
83
84*/
85void aubio_source_do_multi(aubio_source_t * s, fmat_t * read_to, uint_t * read);
86
87/**
88
89  get samplerate of source object
90
91  \param s source object, created with ::new_aubio_source
92  \return samplerate, in Hz
93
94*/
95uint_t aubio_source_get_samplerate(aubio_source_t * s);
96
97/**
98
99  get channels of source object
100
101  \param s source object, created with ::new_aubio_source
102  \return channels
103
104*/
105uint_t aubio_source_get_channels (aubio_source_t * s);
106
107/**
108
109  seek source object
110
111  \param s source object, created with ::new_aubio_source
112  \param pos position to seek to, in frames
113
114  \return 0 if sucessful, non-zero on failure
115
116*/
117uint_t aubio_source_seek (aubio_source_t * s, uint_t pos);
118
119/**
120
121  close source and cleanup memory
122
123  \param s source object, created with ::new_aubio_source
124
125*/
126void del_aubio_source(aubio_source_t * s);
127
128#ifdef __cplusplus
129}
130#endif
131
132#endif /* _AUBIO_SOURCE_H */
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