MPD
mixer_control.h
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1 /*
2  * Copyright (C) 2003-2010 The Music Player Daemon Project
3  * http://www.musicpd.org
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,
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  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19 
25 #ifndef MPD_MIXER_CONTROL_H
26 #define MPD_MIXER_CONTROL_H
27 
28 #include <glib.h>
29 
30 #include <stdbool.h>
31 
32 struct mixer;
33 struct mixer_plugin;
34 struct config_param;
35 
36 struct mixer *
37 mixer_new(const struct mixer_plugin *plugin, void *ao,
38  const struct config_param *param,
39  GError **error_r);
40 
41 void
42 mixer_free(struct mixer *mixer);
43 
44 bool
45 mixer_open(struct mixer *mixer, GError **error_r);
46 
47 void
48 mixer_close(struct mixer *mixer);
49 
54 void
56 
57 int
58 mixer_get_volume(struct mixer *mixer, GError **error_r);
59 
60 bool
61 mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r);
62 
63 #endif