79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "NullOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "../Timer.hxx"
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class NullOutput final : AudioOutput {
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const bool sync;
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Timer *timer;
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public:
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NullOutput(const ConfigBlock &block)
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:AudioOutput(0),
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sync(block.GetBlockValue("sync", true)) {}
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static AudioOutput *Create(EventLoop &,
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const ConfigBlock &block) {
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return new NullOutput(block);
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}
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private:
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void Open(AudioFormat &audio_format) override {
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if (sync)
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timer = new Timer(audio_format);
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}
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void Close() noexcept override {
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if (sync)
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delete timer;
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}
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std::chrono::steady_clock::duration Delay() const noexcept override {
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return sync && timer->IsStarted()
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? timer->GetDelay()
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: std::chrono::steady_clock::duration::zero();
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}
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size_t Play(gcc_unused const void *chunk, size_t size) override {
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if (sync) {
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if (!timer->IsStarted())
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timer->Start();
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timer->Add(size);
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}
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return size;
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}
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void Cancel() noexcept override {
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if (sync)
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timer->Reset();
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}
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};
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const struct AudioOutputPlugin null_output_plugin = {
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"null",
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nullptr,
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&NullOutput::Create,
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nullptr,
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};
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