First working jukebox using Subsonic API

2026-02-17 23:16:52 +01:00
parent c338521843
commit 3963969cec
39 changed files with 1464 additions and 277 deletions
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2026 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <filesystem>
+#include <memory>
+#include <vector>
+
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/io_context_strand.hpp>
+
+#include "audio/PcmTypes.hpp"
+#include "audio/utils/IPcmDecodeStreamer.hpp"
+
+namespace lms::audio
+{
+    class IAudioOutputStream;
+    class IPcmDecoder;
+} // namespace lms::audio
+
+namespace lms::audio::utils
+{
+    class PcmDecodeStreamer : public IPcmDecodeStreamer, public std::enable_shared_from_this<PcmDecodeStreamer>
+    {
+    public:
+        PcmDecodeStreamer(boost::asio::io_context& ioContext, const PcmDecodeStreamerParameters& parameters);
+        ~PcmDecodeStreamer() override;
+
+        PcmDecodeStreamer(const PcmDecodeStreamer&) = delete;
+        PcmDecodeStreamer& operator=(const PcmDecodeStreamer&) = delete;
+
+    private:
+        void start(DecodeCompleteCallback cb) override;
+        void abort() override; // will call DecodeCompleteCallback once done
+
+        const audio::PcmParameters& getPcmParameters() const;
+
+        void prepareBuffers();
+        bool isWritePending() const;
+        void decodeSome();
+        std::size_t readSamples(std::span<std::byte> buffer);
+        void onBufferWriteComplete(std::size_t bufferIndex);
+        void notifyDecodeComplete();
+        std::size_t sampleCountToByteCount(std::size_t sampleCount) const;
+
+        struct BufferDesc
+        {
+            using Buffer = std::vector<std::byte>;
+            Buffer buffer;
+            bool isWritePending{};
+        };
+
+        boost::asio::io_context& _ioContext;
+        boost::asio::io_context::strand _strand;
+        audio::IAudioOutputStream& _outputStream;
+        std::unique_ptr<audio::IPcmDecoder> _pcmDecoder;
+
+        static constexpr std::size_t bufferCount{ 4 };
+        std::vector<BufferDesc> _buffers;
+        std::size_t _nextBufferIndex{};
+        bool _eofReached{};
+        bool _aborted{};
+
+        DecodeCompleteCallback _decodeCompleteCallback;
+    };
+} // namespace lms::audio::utils