ce6c36be |
1 | /* |
2 | * This file is part of DisOrder |
3 | * Copyright (C) 2007 Richard Kettlewell |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
18 | * USA |
19 | */ |
20 | /** @file lib/wav.h |
21 | * @brief WAV file support |
22 | */ |
23 | |
24 | #ifndef WAV_H |
25 | #define WAV_H |
26 | |
27 | /** @brief WAV file access structure */ |
28 | struct wavfile { |
29 | /** @brief File descriptor onto file */ |
30 | int fd; |
31 | |
32 | /** @brief File length */ |
33 | off_t length; |
34 | |
35 | /** @brief Offset of data chunk */ |
36 | off_t data; |
37 | |
38 | /** @brief Sample rate (Hz) */ |
39 | int rate; |
40 | |
41 | /** @brief Number of channels (usually 1 or 2) */ |
42 | int channels; |
43 | |
44 | /** @brief Bits per sample */ |
45 | int bits; |
46 | |
47 | /** @brief Size of data chunk in bytes */ |
48 | off_t datasize; |
49 | }; |
50 | |
51 | /** @brief Sample data callback from wav_data() |
52 | * @param f WAV file being read |
53 | * @param data Pointer to sample data |
54 | * @param nbytes Number of bytes of data |
55 | * @param u As passed to wav_data() |
56 | * @return 0 on success or an errno value on error |
57 | * |
58 | * @p nbytes is always a multiple of the frame size and never 0. |
59 | */ |
60 | typedef int wav_data_callback(struct wavfile *f, |
61 | const char *data, |
62 | size_t nbytes, |
63 | void *u); |
64 | |
65 | int wav_init(struct wavfile *f, const char *path); |
66 | void wav_destroy(struct wavfile *f); |
67 | int wav_data(struct wavfile *f, |
68 | wav_data_callback *callback, |
69 | void *u); |
70 | |
71 | #endif /* WAV_H */ |
72 | |
73 | /* |
74 | Local Variables: |
75 | c-basic-offset:2 |
76 | comment-column:40 |
77 | fill-column:79 |
78 | indent-tabs-mode:nil |
79 | End: |
80 | */ |