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460b9539 | 1 | /* |
2 | * This file is part of DisOrder | |
bd8895a8 | 3 | * Copyright (C) 2004, 2007 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
e7eb3a27 RK |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
b25aac59 | 18 | /** @file lib/mixer.h |
19 | * @brief Mixer support | |
20 | */ | |
460b9539 | 21 | |
22 | #ifndef MIXER_H | |
23 | #define MIXER_H | |
24 | ||
bd8895a8 | 25 | /** @brief Definition of a mixer */ |
26 | struct mixer { | |
27 | /** @brief API used by this mixer */ | |
28 | int api; | |
460b9539 | 29 | |
bd8895a8 | 30 | /** @brief Get the volume |
31 | * @param left Where to store left-channel volume | |
32 | * @param right Where to store right-channel volume | |
33 | * @return 0 on success, non-0 on error | |
34 | */ | |
35 | int (*get)(int *left, int *right); | |
36 | ||
37 | /** @brief Set the volume | |
38 | * @param left Pointer to target left-channel volume | |
39 | * @param right Pointer to target right-channel volume | |
40 | * @return 0 on success, non-0 on error | |
41 | * | |
42 | * @p left and @p right are updated with the actual volume set. | |
43 | */ | |
44 | int (*set)(int *left, int *right); | |
45 | ||
46 | /** @brief Default device */ | |
47 | const char *device; | |
48 | ||
49 | /** @brief Default channel */ | |
50 | const char *channel; | |
51 | }; | |
52 | ||
3c499fe7 | 53 | int mixer_control(int api, int *left, int *right, int set); |
bd8895a8 | 54 | const char *mixer_default_device(int api); |
55 | const char *mixer_default_channel(int api); | |
3c499fe7 | 56 | int mixer_supported(int api); |
bd8895a8 | 57 | |
58 | extern const struct mixer mixer_oss; | |
b25aac59 | 59 | extern const struct mixer mixer_alsa; |
460b9539 | 60 | |
61 | #endif /* MIXER_H */ | |
62 | ||
63 | /* | |
64 | Local Variables: | |
65 | c-basic-offset:2 | |
66 | comment-column:40 | |
67 | End: | |
68 | */ |