73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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/*
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* Saving and loading the audio output states to/from the state file.
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*
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*/
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#include "State.hxx"
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#include "MultipleOutputs.hxx"
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#include "Domain.hxx"
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#include "Log.hxx"
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#include "io/BufferedOutputStream.hxx"
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#include "util/StringCompare.hxx"
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#include <fmt/format.h>
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#include <stdlib.h>
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#define AUDIO_DEVICE_STATE "audio_device_state:"
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unsigned audio_output_state_version;
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void
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audio_output_state_save(BufferedOutputStream &os,
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const MultipleOutputs &outputs)
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{
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for (unsigned i = 0, n = outputs.Size(); i != n; ++i) {
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const auto &ao = outputs.Get(i);
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const std::scoped_lock<Mutex> lock(ao.mutex);
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os.Fmt(FMT_STRING(AUDIO_DEVICE_STATE "{}:{}\n"),
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(unsigned)ao.IsEnabled(), ao.GetName());
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}
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}
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bool
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audio_output_state_read(const char *line, MultipleOutputs &outputs)
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{
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long value;
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char *endptr;
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const char *name;
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line = StringAfterPrefix(line, AUDIO_DEVICE_STATE);
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if (line == nullptr)
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return false;
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value = strtol(line, &endptr, 10);
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if (*endptr != ':' || (value != 0 && value != 1))
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return false;
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if (value != 0)
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/* state is "enabled": no-op */
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return true;
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name = endptr + 1;
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auto *ao = outputs.FindByName(name);
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if (ao == nullptr) {
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FmtDebug(output_domain,
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"Ignoring device state for '{}'", name);
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return true;
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}
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ao->LockSetEnabled(false);
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return true;
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}
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unsigned
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audio_output_state_get_version()
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{
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return audio_output_state_version;
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}
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