92 lines
1.1 KiB
C++
92 lines
1.1 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
// Copyright The Music Player Daemon Project
|
|
|
|
#include "Mixer.hxx"
|
|
|
|
#include <cassert>
|
|
|
|
void
|
|
Mixer::LockOpen()
|
|
{
|
|
const std::scoped_lock lock{mutex};
|
|
|
|
if (open)
|
|
return;
|
|
|
|
_Open();
|
|
}
|
|
|
|
void
|
|
Mixer::_Open()
|
|
{
|
|
assert(!open);
|
|
|
|
try {
|
|
Open();
|
|
open = true;
|
|
failure = {};
|
|
} catch (...) {
|
|
failure = std::current_exception();
|
|
throw;
|
|
}
|
|
}
|
|
|
|
void
|
|
Mixer::LockClose() noexcept
|
|
{
|
|
const std::scoped_lock lock{mutex};
|
|
|
|
if (open)
|
|
_Close();
|
|
}
|
|
|
|
void
|
|
Mixer::_Close() noexcept
|
|
{
|
|
assert(open);
|
|
|
|
Close();
|
|
open = false;
|
|
failure = {};
|
|
}
|
|
|
|
int
|
|
Mixer::LockGetVolume()
|
|
{
|
|
const std::scoped_lock lock{mutex};
|
|
|
|
if (!open) {
|
|
if (IsGlobal() && !failure)
|
|
_Open();
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
try {
|
|
return GetVolume();
|
|
} catch (...) {
|
|
_Close();
|
|
failure = std::current_exception();
|
|
throw;
|
|
}
|
|
}
|
|
|
|
void
|
|
Mixer::LockSetVolume(unsigned volume)
|
|
{
|
|
assert(volume <= 100);
|
|
|
|
const std::scoped_lock lock{mutex};
|
|
|
|
if (!open) {
|
|
if (failure)
|
|
std::rethrow_exception(failure);
|
|
else if (IsGlobal())
|
|
_Open();
|
|
else
|
|
return;
|
|
}
|
|
|
|
SetVolume(volume);
|
|
}
|