00001 /* 00002 * Copyright (C) 2003-2009 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 00027 #ifndef MPD_MIXER_PLUGIN_H 00028 #define MPD_MIXER_PLUGIN_H 00029 00030 #include <stdbool.h> 00031 00032 struct config_param; 00033 struct mixer; 00034 00035 struct mixer_plugin { 00039 struct mixer *(*init)(const struct config_param *param); 00040 00044 void (*finish)(struct mixer *data); 00045 00049 bool (*open)(struct mixer *data); 00050 00054 void (*close)(struct mixer *data); 00055 00062 int (*get_volume)(struct mixer *mixer); 00063 00070 bool (*set_volume)(struct mixer *mixer, unsigned volume); 00071 00077 bool global; 00078 }; 00079 00080 #endif