00001 /* 00002 * Copyright (C) 2003-2011 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