Added vmethod for when an element changes scheduling behaviour (like switching from...

Original commit message from CVS:
Added vmethod for when an element changes scheduling behaviour (like
switching from chain based to loop based etc)

diff --git a/gst/gstscheduler.c b/gst/gstscheduler.c
index ef9ed97..24b2d6f 100644 (file)
--- a/gst/gstscheduler.c
+++ b/gst/gstscheduler.c
@@ -203,8 +203,11 @@ gst_scheduler_add_element (GstScheduler *sched, GstElement *element)
   g_return_if_fail (GST_IS_ELEMENT (element));
 
   /* if it's already in this scheduler, don't bother doing anything */
-  if (GST_ELEMENT_SCHED (element) == sched)
+  if (GST_ELEMENT_SCHED (element) == sched) {
+    GST_DEBUG (GST_CAT_SCHEDULING, "element %s already in scheduler %p", 
+                   GST_ELEMENT_NAME (element), sched);
     return;
+  }
 
   /* if it's not inside this scheduler, it has to be NULL */
   g_assert (GST_ELEMENT_SCHED (element) == NULL);
@@ -313,6 +316,27 @@ gst_scheduler_state_transition (GstScheduler *sched, GstElement *element, gint t
 }
 
 /**
+ * gst_scheduler_state_transition:
+ * @sched: the scheduler
+ * @element: the element with the state transition
+ * @transition: the state transition
+ *
+ * Tell the scheduler that an element changed its state.
+ *
+ * Returns: a GstElementStateReturn indicating success or failure
+ * of the state transition.
+ */
+void
+gst_scheduler_scheduling_change (GstScheduler *sched, GstElement *element)
+{
+  g_return_if_fail (GST_IS_SCHEDULER (sched));
+  g_return_if_fail (GST_IS_ELEMENT (element));
+
+  if (CLASS (sched)->scheduling_change)
+    CLASS (sched)->scheduling_change (sched, element);
+}
+
+/**
  * gst_scheduler_add_scheduler:
  * @sched: a  #GstScheduler to add to
  * @sched2: the #GstScheduler to add

diff --git a/gst/gstscheduler.h b/gst/gstscheduler.h
index d800074..e9eedad 100644 (file)
--- a/gst/gstscheduler.h
+++ b/gst/gstscheduler.h
@@ -89,6 +89,7 @@ struct _GstSchedulerClass {
   void                         (*add_scheduler)        (GstScheduler *sched, GstScheduler *sched2);
   void                         (*remove_scheduler)     (GstScheduler *sched, GstScheduler *sched2);
   GstElementStateReturn (*state_transition)    (GstScheduler *sched, GstElement *element, gint transition);
+  void                 (*scheduling_change)    (GstScheduler *sched, GstElement *element);
   void                         (*lock_element)         (GstScheduler *sched, GstElement *element);
   void                         (*unlock_element)       (GstScheduler *sched, GstElement *element);
   void                         (*yield)                (GstScheduler *sched, GstElement *element);
@@ -119,6 +120,7 @@ void                        gst_scheduler_remove_element    (GstScheduler *sched, GstElement *element);
 void                   gst_scheduler_add_scheduler     (GstScheduler *sched, GstScheduler *sched2);
 void                   gst_scheduler_remove_scheduler  (GstScheduler *sched, GstScheduler *sched2);
 GstElementStateReturn  gst_scheduler_state_transition  (GstScheduler *sched, GstElement *element, gint transition);
+void                   gst_scheduler_scheduling_change (GstScheduler *sched, GstElement *element);
 void                   gst_scheduler_lock_element      (GstScheduler *sched, GstElement *element);
 void                   gst_scheduler_unlock_element    (GstScheduler *sched, GstElement *element);
 void                   gst_scheduler_yield             (GstScheduler *sched, GstElement *element);