53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/*
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* Copyright 2003-2021 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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#ifndef MPD_VOLUME_HXX
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#define MPD_VOLUME_HXX
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class MultipleOutputs;
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class BufferedOutputStream;
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void
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InvalidateHardwareVolume() noexcept;
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[[gnu::pure]]
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int
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volume_level_get(const MultipleOutputs &outputs) noexcept;
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bool
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volume_level_change(MultipleOutputs &outputs, unsigned volume);
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bool
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read_sw_volume_state(const char *line, MultipleOutputs &outputs);
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void
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save_sw_volume_state(BufferedOutputStream &os);
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/**
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* Generates a hash number for the current state of the software
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* volume control. This is used by timer_save_state_file() to
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* determine whether the state has changed and the state file should
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* be saved.
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*/
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[[gnu::pure]]
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unsigned
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sw_volume_state_get_hash() noexcept;
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#endif
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