gst/playback/gstqueue2.c: Fix queue negotiation. See #486758.

Original commit message from CVS:
* gst/playback/gstqueue2.c: (gst_queue_init), (gst_queue_push_one):
Fix queue negotiation. See #486758.

ChangeLog

+2007-10-15  Wim Taymans  <wim.taymans@gmail.com>
+
+	* gst/playback/gstqueue2.c: (gst_queue_init), (gst_queue_push_one):
+	Fix queue negotiation. See #486758.
+
 2007-10-12  Jan Schmidt  <Jan.Schmidt@sun.com>
 
 	* sys/xvimage/xvimagesink.c: (gst_xvimagesink_xwindow_decorate),

gst/playback/gstqueue2.c

@@ -319,7 +319,6 @@ static void gst_queue_get_property (GObject * object,
 static GstFlowReturn gst_queue_chain (GstPad * pad, GstBuffer * buffer);
 static GstFlowReturn gst_queue_bufferalloc (GstPad * pad, guint64 offset,
     guint size, GstCaps * caps, GstBuffer ** buf);
-static gboolean gst_queue_acceptcaps (GstPad * pad, GstCaps * caps);
 static GstFlowReturn gst_queue_push_one (GstQueue * queue);
 static void gst_queue_loop (GstPad * pad);
 
@@ -445,8 +444,6 @@ gst_queue_init (GstQueue * queue, GstQueueClass * g_class)
       GST_DEBUG_FUNCPTR (gst_queue_get_range));
   gst_pad_set_checkgetrange_function (queue->srcpad,
       GST_DEBUG_FUNCPTR (gst_queue_src_checkgetrange_function));
-  gst_pad_set_acceptcaps_function (queue->srcpad,
-      GST_DEBUG_FUNCPTR (gst_queue_acceptcaps));
   gst_pad_set_getcaps_function (queue->srcpad,
       GST_DEBUG_FUNCPTR (gst_queue_getcaps));
   gst_pad_set_event_function (queue->srcpad,
@@ -547,14 +544,6 @@ gst_queue_bufferalloc (GstPad * pad, guint64 offset, guint size, GstCaps * caps,
   return result;
 }
 
-static gboolean
-gst_queue_acceptcaps (GstPad * pad, GstCaps * caps)
-{
-  /* The only time our acceptcaps method should be called is on the srcpad
-   * when we push a buffer, in which case we always accepted those caps */
-  return TRUE;
-}
-
 /* calculate the diff between running time on the sink and src of the queue.
  * This is the total amount of time in the queue. */
 static void
@@ -1359,10 +1348,19 @@ gst_queue_push_one (GstQueue * queue)
 
 next:
   if (GST_IS_BUFFER (data)) {
-    GstBuffer *buffer = GST_BUFFER_CAST (data);
+    GstBuffer *buffer;
+    GstCaps *caps;
+
+    buffer = GST_BUFFER_CAST (data);
+    caps = GST_BUFFER_CAPS (buffer);
 
     GST_QUEUE_MUTEX_UNLOCK (queue);
 
+    /* set caps before pushing the buffer so that core does not try to do
+     * something fancy to check if this is possible. */
+    if (caps && caps != GST_PAD_CAPS (queue->srcpad))
+      gst_pad_set_caps (queue->srcpad, caps);
+
     result = gst_pad_push (queue->srcpad, buffer);
 
     /* need to check for srcresult here as well */