diff -r 9b2c3c7a1a9c -r 567bb019e3e3 gstreamer_core/gst/gstelement.c
--- a/gstreamer_core/gst/gstelement.c	Wed Mar 31 22:03:18 2010 +0300
+++ b/gstreamer_core/gst/gstelement.c	Tue Aug 31 15:30:33 2010 +0300
@@ -73,7 +73,7 @@
  * toplevel #GstPipeline so the clock functions are only to be used in very
  * specific situations.
  *
- * Last reviewed on 2006-03-12 (0.10.5)
+ * Last reviewed on 2009-05-29 (0.10.24)
  */
 
 #include "gst_private.h"
@@ -89,6 +89,7 @@
 #include "gstevent.h"
 #include "gstutils.h"
 #include "gstinfo.h"
+#include "gstvalue.h"
 #include "gst-i18n-lib.h"
 
 #ifdef __SYMBIAN32__
@@ -111,8 +112,9 @@
       /* FILL ME */
 };
 
-extern void __gst_element_details_clear (GstElementDetails * dp);
-extern void __gst_element_details_copy (GstElementDetails * dest,
+IMPORT_C extern void __gst_element_details_clear (GstElementDetails * dp);
+
+IMPORT_C extern void __gst_element_details_copy (GstElementDetails * dest,
     const GstElementDetails * src);
 
 static void gst_element_class_init (GstElementClass * klass);
@@ -148,6 +150,9 @@
 
 static GstObjectClass *parent_class = NULL;
 static guint gst_element_signals[LAST_SIGNAL] = { 0 };
+
+/* this is used in gstelementfactory.c:gst_element_register() */
+GQuark _gst_elementclass_factory = 0;
 #ifdef __SYMBIAN32__
 EXPORT_C
 #endif
@@ -156,9 +161,10 @@
 GType
 gst_element_get_type (void)
 {
-  static GType gst_element_type = 0;
-
-  if (G_UNLIKELY (gst_element_type == 0)) {
+  static volatile gsize gst_element_type = 0;
+
+  if (g_once_init_enter (&gst_element_type)) {
+    GType _type;
     static const GTypeInfo element_info = {
       sizeof (GstElementClass),
       gst_element_base_class_init,
@@ -172,8 +178,12 @@
       NULL
     };
 
-    gst_element_type = g_type_register_static (GST_TYPE_OBJECT, "GstElement",
+    _type = g_type_register_static (GST_TYPE_OBJECT, "GstElement",
         &element_info, G_TYPE_FLAG_ABSTRACT);
+
+    _gst_elementclass_factory =
+        g_quark_from_static_string ("GST_ELEMENTCLASS_FACTORY");
+    g_once_init_leave (&gst_element_type, _type);
   }
   return gst_element_type;
 }
@@ -258,6 +268,13 @@
    */
   memset (&element_class->details, 0, sizeof (GstElementDetails));
   element_class->padtemplates = NULL;
+
+  /* set the factory, see gst_element_register() */
+  element_class->elementfactory =
+      g_type_get_qdata (G_TYPE_FROM_CLASS (element_class),
+      _gst_elementclass_factory);
+  GST_DEBUG ("type %s : factory %p", G_OBJECT_CLASS_NAME (element_class),
+      element_class->elementfactory);
 }
 
 static void
@@ -323,6 +340,10 @@
  * Makes the element free the previously requested pad as obtained
  * with gst_element_get_request_pad().
  *
+ * This does not unref the pad. If the pad was created by using 
+ * gst_element_get_request_pad(), gst_element_release_request_pad() needs to be
+ * followed by gst_object_unref() to free the @pad.
+ *
  * MT safe.
  */
 #ifdef __SYMBIAN32__
@@ -548,7 +569,7 @@
  * Returns the base time of the element. The base time is the
  * absolute time of the clock when this element was last put to
  * PLAYING. Subtracting the base time from the clock time gives
- * the stream time of the element.
+ * the running time of the element.
  *
  * Returns: the base time of the element.
  *
@@ -572,7 +593,81 @@
   return result;
 }
 
-#ifndef GST_DISABLE_INDEX
+/**
+ * gst_element_set_start_time:
+ * @element: a #GstElement.
+ * @time: the base time to set.
+ *
+ * Set the start time of an element. The start time of the element is the
+ * running time of the element when it last went to the PAUSED state. In READY
+ * or after a flushing seek, it is set to 0.
+ *
+ * Toplevel elements like #GstPipeline will manage the start_time and
+ * base_time on its children. Setting the start_time to #GST_CLOCK_TIME_NONE
+ * on such a toplevel element will disable the distribution of the base_time to
+ * the children and can be useful if the application manages the base_time
+ * itself, for example if you want to synchronize capture from multiple
+ * pipelines, and you can also ensure that the pipelines have the same clock.
+ *
+ * MT safe.
+ *
+ * Since: 0.10.24
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_element_set_start_time (GstElement * element, GstClockTime time)
+{
+  GstClockTime old;
+
+  g_return_if_fail (GST_IS_ELEMENT (element));
+
+  GST_OBJECT_LOCK (element);
+  old = GST_ELEMENT_START_TIME (element);
+  GST_ELEMENT_START_TIME (element) = time;
+  GST_OBJECT_UNLOCK (element);
+
+  GST_CAT_DEBUG_OBJECT (GST_CAT_CLOCK, element,
+      "set start_time=%" GST_TIME_FORMAT ", old %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (time), GST_TIME_ARGS (old));
+}
+
+/**
+ * gst_element_get_start_time:
+ * @element: a #GstElement.
+ *
+ * Returns the start time of the element. The start time is the
+ * running time of the clock when this element was last put to PAUSED. 
+ *
+ * Usually the start_time is managed by a toplevel element such as
+ * #GstPipeline. 
+ *
+ * MT safe.
+ *
+ * Returns: the start time of the element.
+ *
+ * Since: 0.10.24
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstClockTime
+gst_element_get_start_time (GstElement * element)
+{
+  GstClockTime result;
+
+  g_return_val_if_fail (GST_IS_ELEMENT (element), GST_CLOCK_TIME_NONE);
+
+  GST_OBJECT_LOCK (element);
+  result = GST_ELEMENT_START_TIME (element);
+  GST_OBJECT_UNLOCK (element);
+
+  return result;
+}
+
 /**
  * gst_element_is_indexable:
  * @element: a #GstElement.
@@ -657,7 +752,6 @@
 
   return result;
 }
-#endif
 
 /**
  * gst_element_add_pad:
@@ -1083,17 +1177,18 @@
  * Retrieves a pad from @element by name. Tries gst_element_get_static_pad()
  * first, then gst_element_get_request_pad().
  *
- * <note>Usage of this function is not recommended as it is unclear if the reference
+ * Deprecated: This function is deprecated as it's unclear if the reference
  * to the result pad should be released with gst_object_unref() in case of a static pad
- * or gst_element_release_request_pad() in case of a request pad.</note>
+ * or gst_element_release_request_pad() in case of a request pad.
+ * Use gst_element_get_static_pad() or gst_element_get_request_pad() instead.
  *
  * Returns: the #GstPad if found, otherwise %NULL. Unref or Release after usage,
  * depending on the type of the pad.
  */
+#ifndef GST_REMOVE_DEPRECATED
 #ifdef __SYMBIAN32__
 EXPORT_C
 #endif
-
 GstPad *
 gst_element_get_pad (GstElement * element, const gchar * name)
 {
@@ -1108,6 +1203,7 @@
 
   return pad;
 }
+#endif /* GST_REMOVE_DEPRECATED */
 
 static GstIteratorItem
 iterate_pad (GstIterator * it, GstPad * pad)
@@ -1793,7 +1889,7 @@
   GstMessage *message = NULL;
 
   /* checks */
-  GST_DEBUG_OBJECT (element, "start");
+  GST_CAT_DEBUG_OBJECT (GST_CAT_MESSAGE, element, "start");
   g_return_if_fail (GST_IS_ELEMENT (element));
   g_return_if_fail ((type == GST_MESSAGE_ERROR) ||
       (type == GST_MESSAGE_WARNING) || (type == GST_MESSAGE_INFO));
@@ -1932,7 +2028,7 @@
 
 was_ok:
   {
-    GST_CAT_DEBUG (GST_CAT_STATES, "elements %s was in locked state %d",
+    GST_CAT_DEBUG (GST_CAT_STATES, "elements %s was already in locked state %d",
         GST_ELEMENT_NAME (element), old);
     GST_OBJECT_UNLOCK (element);
 
@@ -2004,6 +2100,7 @@
     GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, element,
         "syncing state failed (%s)",
         gst_element_state_change_return_get_name (ret));
+    gst_object_unref (parent);
     return FALSE;
   }
 }
@@ -2054,7 +2151,7 @@
     } else {
       timeval = NULL;
     }
-    /* get cookie to dected state change during waiting */
+    /* get cookie to detect state changes during waiting */
     cookie = element->state_cookie;
 
     GST_CAT_INFO_OBJECT (GST_CAT_STATES, element,
@@ -2292,10 +2389,10 @@
   GST_OBJECT_UNLOCK (element);
 
   GST_CAT_INFO_OBJECT (GST_CAT_STATES, element,
-      "committing state from %s to %s, pending %s",
+      "committing state from %s to %s, pending %s, next %s",
       gst_element_state_get_name (old_state),
       gst_element_state_get_name (old_next),
-      gst_element_state_get_name (pending));
+      gst_element_state_get_name (pending), gst_element_state_get_name (next));
 
   message = gst_message_new_state_changed (GST_OBJECT_CAST (element),
       old_state, old_next, pending);
@@ -2349,15 +2446,16 @@
 }
 
 /**
- * gst_element_lost_state:
+ * gst_element_lost_state_full:
  * @element: a #GstElement the state is lost of
+ * @new_base_time: if a new base time should be distributed
  *
  * Brings the element to the lost state. The current state of the
  * element is copied to the pending state so that any call to
  * gst_element_get_state() will return %GST_STATE_CHANGE_ASYNC.
  *
- * An ASYNC_START message is posted with an indication to distribute a new
- * base_time to the element.
+ * An ASYNC_START message is posted with indication to distribute a new
+ * base_time to the element when @new_base_time is %TRUE.
  * If the element was PLAYING, it will go to PAUSED. The element
  * will be restored to its PLAYING state by the parent pipeline when it
  * prerolls again.
@@ -2372,13 +2470,15 @@
  * plugins or applications.
  *
  * MT safe.
+ *
+ * Since: 0.10.24
  */
 #ifdef __SYMBIAN32__
 EXPORT_C
 #endif
 
 void
-gst_element_lost_state (GstElement * element)
+gst_element_lost_state_full (GstElement * element, gboolean new_base_time)
 {
   GstState old_state, new_state;
   GstMessage *message;
@@ -2386,10 +2486,12 @@
   g_return_if_fail (GST_IS_ELEMENT (element));
 
   GST_OBJECT_LOCK (element);
-  if (GST_STATE_PENDING (element) != GST_STATE_VOID_PENDING ||
-      GST_STATE_RETURN (element) == GST_STATE_CHANGE_FAILURE)
+  if (GST_STATE_RETURN (element) == GST_STATE_CHANGE_FAILURE)
     goto nothing_lost;
 
+  if (GST_STATE_PENDING (element) != GST_STATE_VOID_PENDING)
+    goto only_async_start;
+
   old_state = GST_STATE (element);
 
   /* when we were PLAYING, the new state is PAUSED. We will also not
@@ -2408,13 +2510,16 @@
   GST_STATE_NEXT (element) = new_state;
   GST_STATE_PENDING (element) = new_state;
   GST_STATE_RETURN (element) = GST_STATE_CHANGE_ASYNC;
+  if (new_base_time)
+    GST_ELEMENT_START_TIME (element) = 0;
   GST_OBJECT_UNLOCK (element);
 
   message = gst_message_new_state_changed (GST_OBJECT_CAST (element),
       new_state, new_state, new_state);
   gst_element_post_message (element, message);
 
-  message = gst_message_new_async_start (GST_OBJECT_CAST (element), TRUE);
+  message =
+      gst_message_new_async_start (GST_OBJECT_CAST (element), new_base_time);
   gst_element_post_message (element, message);
 
   return;
@@ -2424,6 +2529,36 @@
     GST_OBJECT_UNLOCK (element);
     return;
   }
+only_async_start:
+  {
+    GST_OBJECT_UNLOCK (element);
+
+    message = gst_message_new_async_start (GST_OBJECT_CAST (element), TRUE);
+    gst_element_post_message (element, message);
+    return;
+  }
+}
+
+/**
+ * gst_element_lost_state:
+ * @element: a #GstElement the state is lost of
+ *
+ * Brings the element to the lost state. This function calls
+ * gst_element_lost_state_full() with the new_base_time set to %TRUE.
+ *
+ * This function is used internally and should normally not be called from
+ * plugins or applications.
+ *
+ * MT safe.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+void
+gst_element_lost_state (GstElement * element)
+{
+  gst_element_lost_state_full (element, TRUE);
 }
 
 /**
@@ -2441,6 +2576,9 @@
  * An application can use gst_element_get_state() to wait for the completion
  * of the state change or it can wait for a state change message on the bus.
  *
+ * State changes to %GST_STATE_READY or %GST_STATE_NULL never return
+ * #GST_STATE_CHANGE_ASYNC.
+ *
  * Returns: Result of the state change using #GstStateChangeReturn.
  *
  * MT safe.
@@ -2504,6 +2642,8 @@
   /* this is the (new) state we should go to. TARGET is the last state we set on
    * the element. */
   if (state != GST_STATE_TARGET (element)) {
+    GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, element,
+        "setting target state to %s", gst_element_state_get_name (state));
     GST_STATE_TARGET (element) = state;
     /* increment state cookie so that we can track each state change. We only do
      * this if this is actually a new state change. */
@@ -2600,15 +2740,9 @@
 {
   GstElementClass *oclass;
   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
-  GstState current;
-  GstState next;
 
   oclass = GST_ELEMENT_GET_CLASS (element);
 
-  /* start with the current state. */
-  current = (GstState) GST_STATE_TRANSITION_CURRENT (transition);
-  next = GST_STATE_TRANSITION_NEXT (transition);
-
   /* call the state change function so it can set the state */
   if (oclass->change_state)
     ret = (oclass->change_state) (element, transition);
@@ -2797,17 +2931,20 @@
   /* ERRORS */
 src_failed:
   {
-    GST_DEBUG_OBJECT (element, "source pads_activate failed");
+    GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
+        "source pads_activate failed");
     return FALSE;
   }
 sink_failed:
   {
-    GST_DEBUG_OBJECT (element, "sink pads_activate failed");
+    GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
+        "sink pads_activate failed");
     return FALSE;
   }
 caps_failed:
   {
-    GST_DEBUG_OBJECT (element, "failed to clear caps on pads");
+    GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
+        "failed to clear caps on pads");
     return FALSE;
   }
 }
@@ -2818,6 +2955,7 @@
 {
   GstState state, next;
   GstStateChangeReturn result = GST_STATE_CHANGE_SUCCESS;
+  GstClock **clock_p;
 
   g_return_val_if_fail (GST_IS_ELEMENT (element), GST_STATE_CHANGE_FAILURE);
 
@@ -2854,6 +2992,12 @@
       } else {
         gst_element_set_base_time (element, 0);
       }
+
+      /* In null state release the reference to the clock */
+      GST_OBJECT_LOCK (element);
+      clock_p = &element->clock;
+      gst_object_replace ((GstObject **) clock_p, NULL);
+      GST_OBJECT_UNLOCK (element);
       break;
     default:
       /* this will catch real but unhandled state changes;
@@ -3031,7 +3175,13 @@
       else if (G_IS_PARAM_SPEC_INT64 (spec))
         contents = g_strdup_printf ("%" G_GINT64_FORMAT,
             g_value_get_int64 (&value));
-      else
+      else if (GST_VALUE_HOLDS_STRUCTURE (&value)) {
+        if (g_value_get_boxed (&value) != NULL) {
+          contents = g_strdup_value_contents (&value);
+        } else {
+          contents = g_strdup ("NULL");
+        }
+      } else
         contents = g_strdup_value_contents (&value);
 
       xmlNewChild (param, NULL, (xmlChar *) "value", (xmlChar *) contents);
@@ -3043,7 +3193,7 @@
 
   g_free (specs);
 
-  pads = GST_ELEMENT_PADS (element);
+  pads = g_list_last (GST_ELEMENT_PADS (element));
 
   while (pads) {
     GstPad *pad = GST_PAD_CAST (pads->data);
@@ -3054,7 +3204,7 @@
 
       gst_object_save_thyself (GST_OBJECT_CAST (pad), padtag);
     }
-    pads = g_list_next (pads);
+    pads = g_list_previous (pads);
   }
 
   return parent;