From 57999c28fd7720f5f3e9b3adf55528ddad21cc9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Thu, 10 Jul 2014 12:51:22 +0200
Subject: [PATCH] decodebin: Send sticky events to the new element after
 setting it to PAUSED

... and if this fails for whatever reason we skip the element and instead
try with the next element. This allows us to handle elements that fail
when setting caps on them by just skipping to the next alternative element.
---
 gst/playback/gstdecodebin2.c | 37 +++++++++++++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/gst/playback/gstdecodebin2.c b/gst/playback/gstdecodebin2.c
index 882ef54d7d..aa4be8a4da 100644
--- a/gst/playback/gstdecodebin2.c
+++ b/gst/playback/gstdecodebin2.c
@@ -1889,6 +1889,40 @@ remove_error_filter (GstDecodeBin * dbin, GstElement * element)
   GST_OBJECT_UNLOCK (dbin);
 }
 
+typedef struct
+{
+  gboolean ret;
+  GstPad *peer;
+} SendStickyEventsData;
+
+static gboolean
+send_sticky_event (GstPad * pad, GstEvent ** event, gpointer user_data)
+{
+  SendStickyEventsData *data = user_data;
+  gboolean ret;
+
+  ret = gst_pad_send_event (data->peer, gst_event_ref (*event));
+  if (!ret)
+    data->ret = FALSE;
+
+  return data->ret;
+}
+
+static gboolean
+send_sticky_events (GstDecodeBin * dbin, GstPad * pad)
+{
+  SendStickyEventsData data;
+
+  data.ret = TRUE;
+  data.peer = gst_pad_get_peer (pad);
+
+  gst_pad_sticky_events_foreach (pad, send_sticky_event, &data);
+
+  gst_object_unref (data.peer);
+
+  return data.ret;
+}
+
 /* connect_pad:
  *
  * Try to connect the given pad to an element created from one of the factories,
@@ -2220,7 +2254,8 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
 
     /* Bring the element to the state of the parent */
     if ((gst_element_set_state (element,
-                GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE) {
+                GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE ||
+        !send_sticky_events (dbin, pad)) {
       GstDecodeElement *dtmp = NULL;
       GstElement *tmp = NULL;