82 lines
2.6 KiB
C++
82 lines
2.6 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 <cstddef>
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#include <span>
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#include <vector>
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#include <boost/asio/io_context.hpp>
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#include <boost/asio/io_context_strand.hpp>
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#include "audio/utils/IPcmDecodeStreamer.hpp"
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namespace lms::audio
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{
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class IAudioOutputStream;
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class IPcmDecoder;
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} // namespace lms::audio
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namespace lms::audio::utils
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{
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class PcmDecodeStreamer : public IPcmDecodeStreamer
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{
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public:
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PcmDecodeStreamer(boost::asio::io_context& ioContext, const PcmDecodeStreamerParameters& parameters);
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~PcmDecodeStreamer() override;
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PcmDecodeStreamer(const PcmDecodeStreamer&) = delete;
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PcmDecodeStreamer& operator=(const PcmDecodeStreamer&) = delete;
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private:
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void start(const std::filesystem::path& path, std::chrono::microseconds offset, DecodeCompleteCallback cb) override;
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void abort() override;
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bool isComplete() const override;
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const audio::PcmParameters& getPcmParameters() const;
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void prepareBuffers(std::size_t bufferCount, std::chrono::microseconds bufferDuration);
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bool isWritePending() const;
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void decodeSome();
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std::size_t readSamples(std::span<std::byte> buffer);
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void onBufferWriteComplete(std::size_t bufferIndex);
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void notifyDecodeComplete();
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std::size_t sampleCountToByteCount(std::size_t sampleCount) const;
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struct BufferDesc
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{
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using Buffer = std::vector<std::byte>;
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Buffer buffer;
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bool isWritePending{};
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};
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boost::asio::io_context& _ioContext;
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boost::asio::io_context::strand _strand;
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audio::IAudioOutputStream& _outputStream;
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std::unique_ptr<audio::IPcmDecoder> _pcmDecoder;
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std::vector<BufferDesc> _buffers;
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std::size_t _nextBufferIndex{};
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bool _eofReached{};
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bool _aborted{};
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DecodeCompleteCallback _decodeCompleteCallback;
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};
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} // namespace lms::audio::utils
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