/* * Copyright (C) 2003-2011 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /** \file * * Functions which manipulate a #mixer object. */ #ifndef MPD_MIXER_CONTROL_H #define MPD_MIXER_CONTROL_H #include "gerror.h" #include <stdbool.h> struct mixer; struct mixer_plugin; struct config_param; #ifdef __cplusplus extern "C" { #endif struct mixer * mixer_new(const struct mixer_plugin *plugin, void *ao, const struct config_param *param, GError **error_r); void mixer_free(struct mixer *mixer); bool mixer_open(struct mixer *mixer, GError **error_r); void mixer_close(struct mixer *mixer); /** * Close the mixer unless the plugin's "global" flag is set. This is * called when the #audio_output is closed. */ void mixer_auto_close(struct mixer *mixer); int mixer_get_volume(struct mixer *mixer, GError **error_r); bool mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r); #ifdef __cplusplus } #endif #endif