Implement the new OpenSubsonic API transcoding extension fixes #787

2025-12-03 20:53:11 +01:00
parent 954b873f2b
commit 7feecb2027
30 changed files with 2855 additions and 163 deletions
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2025 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 <string_view>
+#include <vector>
+
+#include "core/LiteralString.hpp"
+
+#include "audio/AudioProperties.hpp"
+#include "audio/TranscodeTypes.hpp"
+
+#include "payloads/StreamDetails.hpp"
+
+namespace lms::api::subsonic
+{
+    struct ClientInfo;
+
+    namespace details
+    {
+        enum class TranscodeReason
+        {
+            AudioCodecNotSupported,
+            AudioBitrateNotSupported,
+            AudioChannelsNotSupported,
+            AudioSampleRateNotSupported,
+            AudioBitdepthNotSupported,
+            ContainerNotSupported,
+            ProtocolNotSupported
+        };
+
+        core::LiteralString transcodeReasonToString(TranscodeReason reason);
+
+        struct DirectPlayResult
+        {
+            bool operator==(const DirectPlayResult&) const = default;
+        };
+
+        struct TranscodeResult
+        {
+            std::vector<TranscodeReason> reasons;
+            StreamDetails targetStreamInfo;
+
+            bool operator==(const TranscodeResult&) const = default;
+        };
+
+        struct FailureResult
+        {
+            std::string reason;
+
+            bool operator==(const FailureResult&) const = default;
+        };
+
+        using TranscodeDecisionResult = std::variant<DirectPlayResult, TranscodeResult, FailureResult>;
+        TranscodeDecisionResult computeTranscodeDecision(const ClientInfo& clientInfo, const audio::AudioProperties& source);
+
+        const audio::TranscodeOutputFormat* selectTranscodeOutputFormat(std::string_view containerName, std::string_view codecName);
+    } // namespace details
+} // namespace lms::api::subsonic