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/*
* Copyright (C) 2003-2013 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_HXX
#define MPD_MIXER_ALL_HXX
/**
* 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
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