MPD 0.17~git
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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 00027 #ifndef MPD_MIXER_PLUGIN_H 00028 #define MPD_MIXER_PLUGIN_H 00029 00030 #include <glib.h> 00031 00032 #include <stdbool.h> 00033 00034 struct config_param; 00035 struct mixer; 00036 00037 struct mixer_plugin { 00048 struct mixer *(*init)(void *ao, const struct config_param *param, 00049 GError **error_r); 00050 00054 void (*finish)(struct mixer *data); 00055 00063 bool (*open)(struct mixer *data, GError **error_r); 00064 00068 void (*close)(struct mixer *data); 00069 00078 int (*get_volume)(struct mixer *mixer, GError **error_r); 00079 00088 bool (*set_volume)(struct mixer *mixer, unsigned volume, 00089 GError **error_r); 00090 00096 bool global; 00097 }; 00098 00099 #endif