Implement the new OpenSubsonic API transcoding extension fixes #787

src/libs/core/impl/media/CodecType.cpp

@@ -71,4 +71,38 @@ namespace lms::core::media
 
         return "Unknown";
     }
-} // namespace lms::core::media
+
+    bool isCodecLossless(CodecType type)
+    {
+        switch (type)
+        {
+        case CodecType::ALAC:
+        case CodecType::APE:
+        case CodecType::DSD:
+
+        case CodecType::FLAC:
+        case CodecType::MP4ALS:
+        case CodecType::PCM:
+        case CodecType::Shorten:
+        case CodecType::TrueAudio:
+        case CodecType::WavPack:
+        case CodecType::WMA9Lossless:
+            return true;
+
+        case CodecType::AAC:
+        case CodecType::AC3:
+        case CodecType::EAC3:
+        case CodecType::MP3:
+        case CodecType::MPC7:
+        case CodecType::MPC8:
+        case CodecType::Opus:
+        case CodecType::Vorbis:
+        case CodecType::WMA1:
+        case CodecType::WMA2:
+        case CodecType::WMA9Pro:
+            return false;
+        }
+
+        return false;
+    }
+} // namespace lms::core::media

src/libs/core/include/core/UUID.hpp

@@ -19,6 +19,7 @@
 
 #pragma once
 
+#include <functional>
 #include <optional>
 #include <string>
 #include <string_view>
@@ -49,3 +50,15 @@ namespace lms::core::stringUtils
     std::optional<UUID>
     readAs(std::string_view str);
 }
+
+namespace std
+{
+    template<>
+    struct hash<lms::core::UUID>
+    {
+        size_t operator()(const lms::core::UUID& str) const
+        {
+            return hash<std::string_view>{}(str.getAsString());
+        }
+    };
+} // namespace std

src/libs/core/include/core/media/CodecType.hpp

@@ -49,4 +49,6 @@ namespace lms::core::media
     };
 
     core::LiteralString codecTypeToString(CodecType type);
-} // namespace lms::core::media
+
+    bool isCodecLossless(CodecType type);
+} // namespace lms::core::media