82 lines
1.7 KiB
C++
82 lines
1.7 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 "Memento.hxx"
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#include "output/MultipleOutputs.hxx"
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#include "Idle.hxx"
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#include "util/StringCompare.hxx"
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#include "io/BufferedOutputStream.hxx"
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#include <fmt/format.h>
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#include <cassert>
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#include <stdlib.h>
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#define SW_VOLUME_STATE "sw_volume: "
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int
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MixerMemento::GetVolume(const MultipleOutputs &outputs) noexcept
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{
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if (last_hardware_volume >= 0 &&
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!hardware_volume_clock.CheckUpdate(std::chrono::seconds(1)))
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/* throttle access to hardware mixers */
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return last_hardware_volume;
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last_hardware_volume = outputs.GetVolume();
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return last_hardware_volume;
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}
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inline bool
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MixerMemento::SetSoftwareVolume(MultipleOutputs &outputs, unsigned volume)
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{
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assert(volume <= 100);
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volume_software_set = volume;
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outputs.SetSoftwareVolume(volume);
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return true;
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}
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inline void
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MixerMemento::SetHardwareVolume(MultipleOutputs &outputs, unsigned volume)
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{
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/* reset the cache */
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last_hardware_volume = -1;
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outputs.SetVolume(volume);
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}
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void
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MixerMemento::SetVolume(MultipleOutputs &outputs, unsigned volume)
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{
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assert(volume <= 100);
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volume_software_set = volume;
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SetHardwareVolume(outputs, volume);
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}
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bool
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MixerMemento::LoadSoftwareVolumeState(const char *line, MultipleOutputs &outputs)
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{
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char *end = nullptr;
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long int sv;
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line = StringAfterPrefix(line, SW_VOLUME_STATE);
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if (line == nullptr)
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return false;
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sv = strtol(line, &end, 10);
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if (*end == 0 && sv >= 0 && sv <= 100)
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SetSoftwareVolume(outputs, sv);
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return true;
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}
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void
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MixerMemento::SaveSoftwareVolumeState(BufferedOutputStream &os) const
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{
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os.Fmt(FMT_STRING(SW_VOLUME_STATE "{}\n"), volume_software_set);
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}
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