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# src/mixer_control.h

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    00001 /*
    00002  * Copyright (C) 2003-2010 The Music Player Daemon Project
    00003  * http://www.musicpd.org
    00004  *
    00005  * This program is free software; you can redistribute it and/or modify
    00006  * it under the terms of the GNU General Public License as published by
    00007  * the Free Software Foundation; either version 2 of the License, or
    00008  * (at your option) any later version.
    00009  *
    00010  * This program is distributed in the hope that it will be useful,
    00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00013  * GNU General Public License for more details.
    00014  *
    00015  * You should have received a copy of the GNU General Public License along
    00016  * with this program; if not, write to the Free Software Foundation, Inc.,
    00017  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
    00018  */
    00019
    00025 #ifndef MPD_MIXER_CONTROL_H
    00026 #define MPD_MIXER_CONTROL_H
    00027
    00028 #include <glib.h>
    00029
    00030 #include <stdbool.h>
    00031
    00032 struct mixer;
    00033 struct mixer_plugin;
    00034 struct config_param;
    00035
    00036 struct mixer *
    00037 mixer_new(const struct mixer_plugin *plugin, void *ao,
    00038           const struct config_param *param,
    00039           GError **error_r);
    00040
    00041 void
    00042 mixer_free(struct mixer *mixer);
    00043
    00044 bool
    00045 mixer_open(struct mixer *mixer, GError **error_r);
    00046
    00047 void
    00048 mixer_close(struct mixer *mixer);
    00049
    00054 void
    00055 mixer_auto_close(struct mixer *mixer);
    00056
    00057 int
    00058 mixer_get_volume(struct mixer *mixer, GError **error_r);
    00059
    00060 bool
    00061 mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r);
    00062
    00063 #endif