[rygel] gst-launch: Fix video items

[Jens Georg <jensgeorg src gnome org>]

commit 5894fdf98122bc4ab6bf601477169429a91a153c
Author: Jens Georg <mail jensge org>
Date:   Mon Aug 31 20:40:06 2015 +0200

    gst-launch: Fix video items
    
    Signed-off-by: Jens Georg <mail jensge org>

 .../gst-launch/rygel-gst-launch-video-item.vala    |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gst-launch/rygel-gst-launch-video-item.vala 
b/src/plugins/gst-launch/rygel-gst-launch-video-item.vala
index a2a4f75..a6057ec 100644
--- a/src/plugins/gst-launch/rygel-gst-launch-video-item.vala
+++ b/src/plugins/gst-launch/rygel-gst-launch-video-item.vala
@@ -39,5 +39,20 @@ public class Rygel.GstLaunch.VideoItem : Rygel.VideoItem {
 
         this.mime_type = mime_type;
         this.add_uri ("gst-launch://" + launch_line);
+
+        // Call the MediaEngine to determine which item representations it can support
+        var media_engine = MediaEngine.get_default ( );
+        media_engine.get_resources_for_item.begin ( this,
+                                                    (obj, res) => {
+            var added_resources = media_engine
+                                  .get_resources_for_item.end (res);
+            debug ("Adding %d resources to item source %s",
+                   added_resources.size, this.get_primary_uri ());
+            foreach (var resrc in added_resources) {
+               debug ("Media-export item media resource %s",
+                      resrc.get_name ());
+            }
+            this.get_resource_list ().add_all (added_resources);
+          });
     }
 }