48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/** \file
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*
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* Functions which affect the mixers of all audio outputs.
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*/
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#ifndef MPD_MIXER_ALL_H
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#define MPD_MIXER_ALL_H
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#include <stdbool.h>
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/**
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* Returns the average volume of all available mixers (range 0..100).
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* Returns -1 if no mixer can be queried.
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*/
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int
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mixer_all_get_volume(void);
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/**
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* Sets the volume on all available mixers.
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*
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* @param volume the volume (range 0..100 or -100..100 if #relative)
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* @param relative if true, then the #volume is added to the current value
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* @return true on success, false on failure
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*/
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bool
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mixer_all_set_volume(int volume, bool relative);
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#endif
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