pad: refuse events in flushing

when we are flushing, don't store the event on the pad but simply return FALSE.
Don't deactivate the srcpad, we need it to be active in order to push the
caps. Downstream can change the scheduling mode of an active pad.

gst/gstpad.c

@@ -4302,6 +4302,9 @@ gst_pad_push_event (GstPad * pad, GstEvent * event)
       break;
     default:
     {
+      if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
+        goto flushed;
+
       /* store the event on the pad, but only on srcpads */
       if (GST_PAD_IS_SRC (pad) && GST_EVENT_IS_STICKY (event)) {
         guint idx;
@@ -4357,9 +4360,6 @@ gst_pad_push_event (GstPad * pad, GstEvent * event)
           break;
       }
 
-      if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
-        goto flushed;
-
       PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH |
           GST_PAD_PROBE_TYPE_BLOCK, event, probe_stopped);
 

plugins/elements/gsttypefindelement.c

@@ -965,6 +965,8 @@ gst_type_find_element_activate (GstPad * pad)
           (guint64) size, ext, &probability);
       g_free (ext);
 
+      GST_DEBUG ("Found caps %" GST_PTR_FORMAT, found_caps);
+
       gst_object_unref (peer);
     }
   }
@@ -983,13 +985,18 @@ gst_type_find_element_activate (GstPad * pad)
   }
 
   /* 3 */
+  GST_DEBUG ("Deactivate pull mode");
   gst_pad_activate_pull (pad, FALSE);
 
+#if 0
   /* 4 */
+  GST_DEBUG ("Deactivate push mode mode");
   gst_pad_activate_push (typefind->src, FALSE);
+#endif
 
   /* 5 */
   if (!found_caps || probability < typefind->min_probability) {
+    GST_DEBUG ("Trying to guess using extension");
     found_caps = gst_type_find_guess_by_extension (typefind, pad, &probability);
   }
 
@@ -1002,9 +1009,11 @@ gst_type_find_element_activate (GstPad * pad)
 
 done:
   /* 7 */
+  GST_DEBUG ("Emiting found caps %" GST_PTR_FORMAT, found_caps);
   g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE],
       0, probability, found_caps);
   typefind->mode = MODE_NORMAL;
+
 really_done:
   gst_caps_unref (found_caps);
 
@@ -1014,6 +1023,7 @@ really_done:
   else {
     gboolean ret;
 
+    GST_DEBUG ("Activating in push mode");
     ret = gst_pad_activate_push (typefind->src, TRUE);
     ret &= gst_pad_activate_push (pad, TRUE);
     return ret;