/* * Copyright (C) 2003-2009 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 affect the mixers of all audio outputs. */ #ifndef MPD_MIXER_ALL_H #define MPD_MIXER_ALL_H #include <stdbool.h> /** * Returns the average volume of all available mixers (range 0..100). * Returns -1 if no mixer can be queried. */ int mixer_all_get_volume(void); /** * Sets the volume on all available mixers. * * @param volume the volume (range 0..100) * @return true on success, false on failure */ bool mixer_all_set_volume(unsigned volume); /** * Similar to mixer_all_get_volume(), but gets the volume only for * software mixers. See #software_mixer_plugin. This function fails * if no software mixer is configured. */ int mixer_all_get_software_volume(void); /** * Similar to mixer_all_set_volume(), but sets the volume only for * software mixers. See #software_mixer_plugin. This function cannot * fail, because the underlying software mixers cannot fail either. */ void mixer_all_set_software_volume(unsigned volume); #endif