source: src/io/source.h @ 7982203

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 7982203 was 7982203, checked in by Paul Brossier <piem@piem.org>, 11 years ago

add seek to src/io/source*

  • Property mode set to 100644
File size: 2.5 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  \example io/test-source.c
29
30*/
31
32#ifdef __cplusplus
33extern "C" {
34#endif
35
36/** media source object */
37typedef struct _aubio_source_t aubio_source_t;
38
39/**
40
41  create new ::aubio_source_t
42
43  \param uri the file path or uri to read from
44  \param samplerate sampling rate to view the fie at
45  \param hop_size the size of the blocks to read from
46
47  Creates a new source object. If `0` is passed as `samplerate`, the sample
48  rate of the original file is used.
49
50  The samplerate of newly created source can be obtained using
51  ::aubio_source_get_samplerate.
52
53*/
54aubio_source_t * new_aubio_source(char_t * uri, uint_t samplerate, uint_t hop_size);
55
56/**
57
58  read monophonic vector of length hop_size from source object
59
60  \param s source object, created with ::new_aubio_source
61  \param read_to ::fvec_t of data to read to
62  \param read upon returns, equals to number of frames actually read
63
64  Upon returns, `read` contains the number of frames actually read from the
65  source. `hop_size` if enough frames could be read, less otherwise.
66
67*/
68void aubio_source_do(aubio_source_t * s, fvec_t * read_to, uint_t * read);
69
70/**
71
72  get samplerate of source object
73
74  \param s source object, created with ::new_aubio_source
75  \return samplerate, in Hz
76
77*/
78uint_t aubio_source_get_samplerate(aubio_source_t * s);
79
80/**
81
82  seek source object
83
84  \param s source object, created with ::new_aubio_source
85  \param pos position to seek to, in frames
86
87  \return 0 if sucessful, non-zero on failure
88
89*/
90uint_t aubio_source_seek (aubio_source_t * s, uint_t pos);
91
92/**
93
94  close source and cleanup memory
95
96  \param s source object, created with ::new_aubio_source
97
98*/
99void del_aubio_source(aubio_source_t * s);
100
101#ifdef __cplusplus
102}
103#endif
104
105#endif /* _AUBIO_SOURCE_H */
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