Subsonic API: getCoverArt: serve raw image if size is not provided

src/libs/services/artwork/impl/ImageCache.hpp

@@ -20,6 +20,7 @@
 #pragma once
 
 #include <atomic>
+#include <optional>
 #include <shared_mutex>
 #include <unordered_map>
 #include <variant>
@@ -40,7 +41,7 @@ namespace lms::cover
         {
             using VariantType = std::variant<db::ArtistId, db::ReleaseId, db::TrackId>;
             VariantType id;
-            std::size_t size;
+            std::optional<std::size_t> size;
 
             bool operator==(const EntryDesc& other) const = default;
         };
@@ -60,7 +61,8 @@ namespace lms::cover
         {
             std::size_t operator()(const EntryDesc& entry) const
             {
-                return std::hash<EntryDesc::VariantType>{}(entry.id) ^ std::hash<std::size_t>{}(entry.size);
+                assert(entry.size); // should not cache unresized images
+                return std::hash<EntryDesc::VariantType>{}(entry.id) ^ std::hash<std::size_t>{}(*entry.size);
             }
         };