MPD  0.20.15
Volume.hxx
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1 /*
2  * Copyright 2003-2017 The Music Player Daemon Project
3  * http://www.musicpd.org
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19 
20 #ifndef MPD_VOLUME_HXX
21 #define MPD_VOLUME_HXX
22 
23 #include "Compiler.h"
24 
25 class MultipleOutputs;
27 
28 void
29 InvalidateHardwareVolume() noexcept;
30 
32 int
33 volume_level_get(const MultipleOutputs &outputs) noexcept;
34 
35 bool
36 volume_level_change(MultipleOutputs &outputs, unsigned volume);
37 
38 bool
39 read_sw_volume_state(const char *line, MultipleOutputs &outputs);
40 
41 void
43 
51 unsigned
52 sw_volume_state_get_hash() noexcept;
53 
54 #endif
bool volume_level_change(MultipleOutputs &outputs, unsigned volume)
bool read_sw_volume_state(const char *line, MultipleOutputs &outputs)
gcc_pure unsigned sw_volume_state_get_hash() noexcept
Generates a hash number for the current state of the software volume control.
gcc_pure int volume_level_get(const MultipleOutputs &outputs) noexcept
An OutputStream wrapper that buffers its output to reduce the number of OutputStream::Write() calls...
void save_sw_volume_state(BufferedOutputStream &os)
#define gcc_pure
Definition: Compiler.h:116
void InvalidateHardwareVolume() noexcept