61 lines
2.0 KiB
C++
61 lines
2.0 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 "audio/IPcmDecoder.hpp"
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#include "FFmpegTypes.hpp"
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namespace lms::audio::ffmpeg
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{
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class PcmDecoder : public IPcmDecoder
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{
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public:
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PcmDecoder(const std::filesystem::path& filePath, std::chrono::microseconds offset, const PcmParameters& parameters);
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~PcmDecoder() override;
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PcmDecoder(const PcmDecoder&) = delete;
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PcmDecoder& operator=(const PcmDecoder&) = delete;
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private:
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const PcmParameters& getParameters() const override;
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std::size_t readSamples(std::span<WritableBuffer> outputChannelBuffers) override;
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bool finished() const override;
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std::size_t computeSampleCountPerChannel(std::span<WritableBuffer> outputChannelBuffers) const;
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void feedDecoder();
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std::size_t drainResampler(std::span<WritableBuffer> outputChannelBuffers, std::size_t maxSamplesPerChannel);
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std::size_t getEstimatedResamplerAvailableSamples() const;
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const PcmParameters _parameters;
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bool _finished{};
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bool _eof{};
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bool _draining{};
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AVFormatContextPtr _context;
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int _inputStreamIndex{};
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AVCodecContextPtr _decoderContext;
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AVFramePtr _decodedFrame;
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AVPacketPtr _inputPacket;
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SwrContextPtr _resampleContext;
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};
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} // namespace lms::audio::ffmpeg
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