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