Use std::shared_ptrfor AlbumCoverLoaderResult

Reduces memory fragmentation with Qt 6

src/covermanager/albumcoverimageresult.h

@@ -22,21 +22,24 @@
 
 #include "config.h"
 
+#include <memory>
+
 #include <QMetaType>
 #include <QByteArray>
 #include <QString>
 #include <QUrl>
 #include <QImage>
 
-struct AlbumCoverImageResult {
+class AlbumCoverImageResult {
+ public:
   explicit AlbumCoverImageResult(const QUrl &_cover_url = QUrl(),
                                  const QString &_mime_type = QString(),
                                  const QByteArray &_image_data = QByteArray(),
-                                 const QImage &_image = QImage()) :
-                                 cover_url(_cover_url),
-                                 mime_type(_mime_type),
-                                 image_data(_image_data), image(_image) {}
-
+                                 const QImage &_image = QImage())
+    : cover_url(_cover_url),
+      mime_type(_mime_type),
+      image_data(_image_data),
+      image(_image) {}
   explicit AlbumCoverImageResult(const QImage &_image) : image(_image) {}
 
   QUrl cover_url;
@@ -48,6 +51,10 @@ struct AlbumCoverImageResult {
   bool is_jpeg() const { return mime_type == "image/jpeg" && !image_data.isEmpty(); }
 
 };
+
+using AlbumCoverImageResultPtr = std::shared_ptr<AlbumCoverImageResult>;
+
 Q_DECLARE_METATYPE(AlbumCoverImageResult)
+Q_DECLARE_METATYPE(AlbumCoverImageResultPtr)
 
 #endif  // ALBUMCOVERIMAGERESULT_H