From 8162a583a4dd68582bf186e2e47a8f0d68fa1980 Mon Sep 17 00:00:00 2001
From: Wim Taymans <wtaymans@redhat.com>
Date: Thu, 21 Nov 2013 14:13:16 +0100
Subject: [PATCH] ghostpad: copy sticky events to SRC ghostpads

Update the sticky events on SRC ghostpads when retargeting. This ensures
that the ghostpad has the exect same sticky events as the target pad. We
don't want to do this for SINK ghostpads, they got the events from
downstream and we don't want to overwrite them with the target pad
events.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=707621
---
 gst/gstghostpad.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/gst/gstghostpad.c b/gst/gstghostpad.c
index 98712d8aa6..fc59af12c1 100644
--- a/gst/gstghostpad.c
+++ b/gst/gstghostpad.c
@@ -804,6 +804,26 @@ gst_ghost_pad_get_target (GstGhostPad * gpad)
   return ret;
 }
 
+static gboolean
+clear_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
+{
+  GST_DEBUG_OBJECT (pad, "clearing sticky event %" GST_PTR_FORMAT, *event);
+  gst_event_unref (*event);
+  *event = NULL;
+  return TRUE;
+}
+
+static gboolean
+copy_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
+{
+  GstPad *internal = GST_PAD_CAST (user_data);
+
+  GST_DEBUG_OBJECT (internal, "store sticky event %" GST_PTR_FORMAT, *event);
+  gst_pad_store_sticky_event (internal, *event);
+
+  return TRUE;
+}
+
 /**
  * gst_ghost_pad_set_target:
  * @gpad: the #GstGhostPad
@@ -844,6 +864,14 @@ gst_ghost_pad_set_target (GstGhostPad * gpad, GstPad * newtarget)
       gst_pad_unlink (internal, oldtarget);
     else
       gst_pad_unlink (oldtarget, internal);
+
+    if (GST_PAD_IS_SRC (gpad)) {
+      /* only clear the events on the SRC ghostpad. We don't clear sink
+       * ghostpads, they got their events from downstream and we want to
+       * set the same events on the target later. */
+      gst_pad_sticky_events_foreach (GST_PAD_CAST (gpad), clear_sticky_events,
+          NULL);
+    }
   } else {
     GST_OBJECT_UNLOCK (gpad);
   }
@@ -862,6 +890,13 @@ gst_ghost_pad_set_target (GstGhostPad * gpad, GstPad * newtarget)
 
     if (lret != GST_PAD_LINK_OK)
       goto link_failed;
+
+    if (GST_PAD_IS_SRC (gpad)) {
+      /* only copy the events to the SRC ghostpad. We don't copy to sink
+       * ghostpads, they got their events from downstream and we don't want
+       * to overwrite those with events from this new target. */
+      gst_pad_sticky_events_foreach (newtarget, copy_sticky_events, gpad);
+    }
   }
 
   return TRUE;