[pitivi] Add a workaround for some deadlocks involving PictureFileSource and ghostpads.

[Edward Hervey <edwardrv src gnome org>]

commit 021a0cd5bc0076691dd6ad6d35dd95fdf4df958c
Author: Alessandro Decina <alessandro d gmail com>
Date:   Tue Aug 4 15:58:22 2009 +0200

    Add a workaround for some deadlocks involving PictureFileSource and ghostpads.

 pitivi/factories/file.py |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/factories/file.py b/pitivi/factories/file.py
index 8cc4f0a..741b01b 100644
--- a/pitivi/factories/file.py
+++ b/pitivi/factories/file.py
@@ -114,9 +114,14 @@ class PictureFileSourceFactory(FileSourceFactory):
 
     def _dbinPadRemovedCb(self, unused_dbin, pad, scale, freeze, container):
         ghost = container.get_pad("src")
-        target = ghost.get_target()
-        peer = target.get_peer()
-        target.unlink(peer)
+        # FIXME: what we want to do here is ghost.set_target(None). Since that
+        # isn't possible as of pygst 0.10.15
+        # (http://bugzilla.gnome.org/show_bug.cgi?id=590735) we create a
+        # throw away srcpad and retarget the ghostpad we are removing to it.
+        # This hopefully fixes deadlocks, abort() and other weird stuff we're
+        # having with freeze.
+        die = gst.Pad("die", gst.PAD_SRC)
+        ghost.set_target(die)
         container.remove_pad(ghost)
         pad.unlink(scale.get_pad("sink"))