asset: Fix asset cache for CLips and TrackElement with same ID

We clearly uniquely identify assets by both their IDs and their
extractable type, and we should make sure that you can have a
TrackElement and a Clip with the same ID.

There is one exception in our implementation which is GESFormatter
because we treat their subclasses as 1 type with different IDs.

diff --git a/ges/ges-asset.c b/ges/ges-asset.c
index 5cb77fe..5971b48 100644 (file)
--- a/ges/ges-asset.c
+++ b/ges/ges-asset.c
@@ -458,16 +458,14 @@ ges_asset_init (GESAsset * self)
 
 /* Internal methods */
 
-/* Find the type that implemented the GESExtractable interface */
 static inline const gchar *
 _extractable_type_name (GType type)
 {
-  while (1) {
-    if (g_type_is_a (g_type_parent (type), GES_TYPE_EXTRACTABLE))
-      type = g_type_parent (type);
-    else
-      return g_type_name (type);
-  }
+  /* We can use `ges_asset_request (GES_TYPE_FORMATTER);` */
+  if (g_type_is_a (type, GES_TYPE_FORMATTER))
+    return g_type_name (GES_TYPE_FORMATTER);
+
+  return g_type_name (type);
 }
 
 static void