Add colorspace and videoscale elements before the videosink

Farsight only adds colorspace and videoscale automatically on the input side of
things, not on the output side. This causes things to break when the videosink
isn't xvimagesink which can do scaling and colorspace conversion in hardware.

Fixes gbz #576386

From: Sjoerd Simons <sjoerd.simons@collabora.co.uk>

svn path=/trunk/; revision=2746

1 files changed, 35 insertions, 1 deletions

diff --git a/libempathy-gtk/empathy-video-widget.c b/libempathy-gtk/empathy-video-widget.c
index 5b76257f4..4c7bee9db 100644
--- a/libempathy-gtk/empathy-video-widget.c
+++ b/libempathy-gtk/empathy-video-widget.c
@@ -103,13 +103,47 @@ static void
 empathy_video_widget_constructed (GObject *object)
 {
   EmpathyVideoWidgetPriv *priv = GET_PRIV (object);
+  GstElement *colorspace, *videoscale, *sink;
+  GstPad *pad;
+
+  priv->videosink = gst_bin_new (NULL);
 
-  priv->videosink = gst_element_factory_make ("gconfvideosink", NULL);
   gst_object_ref (priv->videosink);
   gst_object_sink (priv->videosink);
 
   priv->sink_pad = gst_element_get_static_pad (priv->videosink, "sink");
 
+  sink = gst_element_factory_make ("gconfvideosink", NULL);
+  g_assert (sink != NULL);
+
+  videoscale = gst_element_factory_make ("videoscale", NULL);
+  g_assert (videoscale != NULL);
+
+  g_object_set (videoscale, "qos", FALSE, NULL);
+
+  colorspace = gst_element_factory_make ("ffmpegcolorspace", NULL);
+  g_assert (colorspace != NULL);
+
+  g_object_set (colorspace, "qos", FALSE, NULL);
+
+  gst_bin_add_many (GST_BIN (priv->videosink), colorspace, videoscale,
+    sink, NULL);
+
+  if (!gst_element_link (colorspace, videoscale))
+    g_error ("Failed to link ffmpegcolorspace and videoscale");
+
+  if (!gst_element_link (videoscale, sink))
+    g_error ("Failed to link videoscale and gconfvideosink");
+
+  pad = gst_element_get_static_pad (colorspace, "sink");
+  g_assert (pad != NULL);
+
+  priv->sink_pad = gst_ghost_pad_new ("sink", pad);
+  if (!gst_element_add_pad  (priv->videosink, priv->sink_pad))
+    g_error ("Couldn't add sink ghostpad to the bin");
+
+  gst_object_unref (pad);
+
   fs_element_added_notifier_add (priv->notifier, GST_BIN (priv->videosink));
   gst_bus_enable_sync_message_emission (priv->bus);