118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
/*
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* Copyright (C) 2026 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS 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 3 of the License, or
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* (at your option) any later version.
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*
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* LMS 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
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <deque>
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#include <list>
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#include <vector>
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#include "audio/IAudioOutput.hpp"
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extern "C"
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{
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struct pa_context;
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struct pa_proplist;
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struct pa_stream;
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struct pa_threaded_mainloop;
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}
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namespace lms::audio::pulseaudio
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{
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struct PaPropListDeleter
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{
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void operator()(pa_proplist* proplist) const noexcept;
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};
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using PaPropListPtr = std::unique_ptr<pa_proplist, PaPropListDeleter>;
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struct PaStreamDeleter
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{
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void operator()(pa_stream* stream) const noexcept;
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};
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using PaStreamPtr = std::unique_ptr<pa_stream, PaStreamDeleter>;
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class AudioOutputStream : public IAudioOutputStream
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{
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public:
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AudioOutputStream(boost::asio::io_context& ioContext, pa_context* context, pa_threaded_mainloop* mainLoop, std::string_view name, const PcmParameters& outputParameters);
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~AudioOutputStream() override;
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AudioOutputStream(AudioOutputStream&) = delete;
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AudioOutputStream& operator=(AudioOutputStream&) = delete;
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private:
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const PcmParameters& getParameters() const override;
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void asyncWaitReady(WaitReadyCallback cb) override;
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void asyncWrite(std::span<const std::byte> buffer, WriteCompletionCallback cb) override;
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void asyncDrain(DrainCompletionCallback cb) override;
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std::chrono::microseconds getPlaybackTime() const override;
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std::chrono::microseconds getLatency() const override;
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void flush() override;
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void pause() override;
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void resume() override;
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bool isPaused() const override;
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void setVolume(float volume) override;
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float getVolume() const override;
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void connect();
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void onStateChanged();
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void onWriteRequested(std::size_t writableSize);
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void writeSome(std::size_t writableSize);
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void drain();
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void onDrainComplete(bool success);
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boost::asio::io_context& _ioContext;
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pa_context* _context;
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pa_threaded_mainloop* _mainLoop;
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const PcmParameters _outputParameters;
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PaStreamPtr _stream;
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float _currentVolume{ 1.F };
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WaitReadyCallback _waitReadyCallback;
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using WriteOperationId = std::size_t;
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struct WriteOperation
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{
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WriteOperationId id{};
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AudioOutputStream* stream{};
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std::span<const std::byte> buffer;
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WriteCompletionCallback callback;
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};
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WriteOperationId _nextWriteOperationId{};
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std::list<WriteOperation> _operations; // we want obj addresses to be stable
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std::vector<WriteOperation*> _freeOperations;
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std::deque<WriteOperation*> _pendingWriteOperations;
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std::size_t _ongoingWriteOperationCount{};
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WriteOperation* acquireWriteOperation();
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void releaseWriteOperation(WriteOperation* operation);
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void onWriteOperationComplete(WriteOperation* operation);
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void onPartialWriteOperationComplete(WriteOperation* operation);
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void onWriteOperationCancelled(WriteOperation* operation);
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bool _drainRequested{};
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bool _drainDone{};
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DrainCompletionCallback _drainCallback;
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};
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} // namespace lms::audio::pulseaudio
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