Scan for audio properties, metadata, and embedded images in one single pass. Removed now useless lmsmetadata library + reworked code accordingly

2025-11-02 16:23:10 +01:00
parent 8e554b258c
commit b25e3b9b1e
112 changed files with 4005 additions and 3379 deletions
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2020 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 <chrono>
+#include <filesystem>
+#include <functional>
+#include <optional>
+#include <span>
+#include <string>
+#include <vector>
+
+#include "audio/AudioTypes.hpp"
+
+extern "C"
+{
+    struct AVFormatContext;
+}
+
+namespace lms::audio::ffmpeg
+{
+    struct Picture
+    {
+        std::string mimeType;
+        std::span<const std::byte> data; // valid as long as IAudioFile exists
+    };
+
+    struct ContainerInfo
+    {
+        std::optional<ContainerType> container;
+        std::string containerName;
+
+        std::size_t bitrate{};
+        std::chrono::milliseconds duration{};
+    };
+
+    struct StreamInfo
+    {
+        size_t index{};
+        std::optional<CodecType> codec;
+        std::string codecName;
+
+        std::optional<size_t> bitrate;
+        std::optional<std::size_t> bitsPerSample;
+        std::optional<std::size_t> channelCount;
+        std::optional<std::size_t> sampleRate;
+    };
+
+    class AudioFile
+    {
+    public:
+        AudioFile(const std::filesystem::path& p);
+        ~AudioFile();
+        AudioFile(const AudioFile&) = delete;
+        AudioFile& operator=(const AudioFile&) = delete;
+
+        using MetadataMap = std::unordered_map<std::string, std::string>;
+
+        const std::filesystem::path& getPath() const;
+        ContainerInfo getContainerInfo() const;
+        MetadataMap getMetaData() const;
+        std::vector<StreamInfo> getStreamInfo() const;
+        std::optional<StreamInfo> getBestStreamInfo() const;
+        std::optional<std::size_t> getBestStreamIndex() const;
+        bool hasAttachedPictures() const;
+        void visitAttachedPictures(std::function<void(const Picture&, const MetadataMap&)> func) const;
+
+    private:
+        std::optional<StreamInfo> getStreamInfo(std::size_t streamIndex) const;
+
+        const std::filesystem::path _p;
+        AVFormatContext* _context{};
+    };
+} // namespace lms::audio::ffmpeg