2 * This file is part of DisOrder
3 * Copyright (C) 2004, 2007 Richard Kettlewell
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 3 of the License, or
8 * (at your option) any later version.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * @brief Mixer support
25 /** @brief Definition of a mixer */
27 /** @brief API used by this mixer */
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
35 int (*get
)(int *left
, int *right
);
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
42 * @p left and @p right are updated with the actual volume set.
44 int (*set
)(int *left
, int *right
);
46 /** @brief Default device */
49 /** @brief Default channel */
53 int mixer_control(int api
, int *left
, int *right
, int set
);
54 const char *mixer_default_device(int api
);
55 const char *mixer_default_channel(int api
);
56 int mixer_supported(int api
);
58 extern const struct mixer mixer_oss
;
59 extern const struct mixer mixer_alsa
;