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Further lib/ testing.
[disorder] / lib / mixer.h
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460b9539 1/*
2 * This file is part of DisOrder
bd8895a8 3 * Copyright (C) 2004, 2007 Richard Kettlewell
460b9539 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 */
b25aac59 20/** @file lib/mixer.h
21 * @brief Mixer support
22 */
460b9539 23
24#ifndef MIXER_H
25#define MIXER_H
26
bd8895a8 27/** @brief Definition of a mixer */
28struct mixer {
29 /** @brief API used by this mixer */
30 int api;
460b9539 31
bd8895a8 32 /** @brief Get the volume
33 * @param left Where to store left-channel volume
34 * @param right Where to store right-channel volume
35 * @return 0 on success, non-0 on error
36 */
37 int (*get)(int *left, int *right);
38
39 /** @brief Set the volume
40 * @param left Pointer to target left-channel volume
41 * @param right Pointer to target right-channel volume
42 * @return 0 on success, non-0 on error
43 *
44 * @p left and @p right are updated with the actual volume set.
45 */
46 int (*set)(int *left, int *right);
47
48 /** @brief Default device */
49 const char *device;
50
51 /** @brief Default channel */
52 const char *channel;
53};
54
460b9539 55int mixer_control(int *left, int *right, int set);
bd8895a8 56const char *mixer_default_device(int api);
57const char *mixer_default_channel(int api);
58
59extern const struct mixer mixer_oss;
b25aac59 60extern const struct mixer mixer_alsa;
460b9539 61
62#endif /* MIXER_H */
63
64/*
65Local Variables:
66c-basic-offset:2
67comment-column:40
68End:
69*/