use a "CacheCover" folder for scaled covers

server/ctrlsubsonic/ctrl.go

@@ -25,8 +25,9 @@ const (
 
 type Controller struct {
 	*ctrlbase.Controller
-	CachePath string
-	Jukebox   *jukebox.Jukebox
+	CachePath      string
+	CoverCachePath string
+	Jukebox        *jukebox.Jukebox
 }
 
 type metaResponse struct {

server/ctrlsubsonic/handlers_raw.go

@@ -106,7 +106,7 @@ func (c *Controller) ServeGetCoverArt(w http.ResponseWriter, r *http.Request) *s
 	}
 	size := params.GetOrInt("size", coverDefaultSize)
 	cachePath := path.Join(
-		c.CachePath,
+		c.CoverCachePath,
 		fmt.Sprintf("%s-%d.%s", id.String(), size, coverCacheFormat),
 	)
 	_, err = os.Stat(cachePath)

server/server.go

@@ -21,10 +21,11 @@ import (
 )
 
 type Options struct {
-	DB          *db.DB
-	MusicPath   string
-	CachePath   string
-	ProxyPrefix string
+	DB             *db.DB
+	MusicPath      string
+	CachePath      string
+	CoverCachePath string
+	ProxyPrefix    string
 }
 
 type Server struct {
@@ -61,9 +62,10 @@ func New(opts Options) *Server {
 	//
 	ctrlAdmin := ctrladmin.New(base, sessDB)
 	ctrlSubsonic := &ctrlsubsonic.Controller{
-		Controller: base,
-		CachePath:  opts.CachePath,
-		Jukebox:    jukebox,
+		Controller:     base,
+		CachePath:      opts.CachePath,
+		CoverCachePath: opts.CoverCachePath,
+		Jukebox:        jukebox,
 	}
 	setupMisc(r, base)
 	setupAdmin(r.PathPrefix("/admin").Subrouter(), ctrlAdmin)