Added a size event to optimize buffer sizes make filesrc update its blocksize when it receives a size event

Original commit message from CVS:
Added a size event to optimize buffer sizes
make filesrc update its blocksize when it receives a size event

gst/elements/gstfilesrc.c

@@ -727,6 +727,13 @@ gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
       src->seek_happened = TRUE;
       src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
       break;
+    case GST_EVENT_SIZE:
+      if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
+	return FALSE;
+      }
+      src->block_size = GST_EVENT_SIZE_VALUE (event);
+      g_object_notify (G_OBJECT (src), "blocksize");  
+      break;
     case GST_EVENT_FLUSH:
       src->need_flush = TRUE;
       break;

gst/gstevent.c

@@ -235,5 +235,17 @@ gst_event_discont_get_value (GstEvent *event, GstFormat format, gint64 *value)
 }
 
 
+GstEvent*
+gst_event_new_size (GstFormat format, gint64 value)
+{
+  GstEvent *event;
+
+  event = gst_event_new (GST_EVENT_SIZE);
+  GST_EVENT_SIZE_FORMAT (event) = format;
+  GST_EVENT_SIZE_VALUE (event) = value;
+  
+  return event;
+}
+
 
 

gst/gstevent.h

@@ -41,6 +41,7 @@ typedef enum {
   GST_EVENT_QOS,
   GST_EVENT_SEEK,
   GST_EVENT_FILLER,
+  GST_EVENT_SIZE,
 } GstEventType;
 
 extern GType _gst_event_type;
@@ -93,6 +94,9 @@ typedef struct
 #define GST_EVENT_DISCONT_OFFSET(event,i)	(GST_EVENT(event)->event_data.discont.offsets[i])
 #define GST_EVENT_DISCONT_OFFSET_LEN(event)	(GST_EVENT(event)->event_data.discont.noffsets)
 
+#define GST_EVENT_SIZE_FORMAT(event)		(GST_EVENT(event)->event_data.size.format)
+#define GST_EVENT_SIZE_VALUE(event)		(GST_EVENT(event)->event_data.size.value)
+
 struct _GstEvent {
   GstData data;
 
@@ -111,6 +115,10 @@ struct _GstEvent {
       gint      	noffsets;
       gboolean		new_media;
     } discont;
+    struct {
+      GstFormat 	format;
+      gint64      	value;
+    } size;
   } event_data;
 };
 
@@ -123,6 +131,9 @@ void		gst_event_free 			(GstEvent *event);
 /* seek event */
 GstEvent*	gst_event_new_seek		(GstSeekType type, gint64 offset);
 
+/* size events */
+GstEvent*	gst_event_new_size		(GstFormat format, gint64 value);
+
 /* discontinous event */
 GstEvent*	gst_event_new_discontinuous	(gboolean new_media,
 						 GstFormat format1, ...);

plugins/elements/gstfilesrc.c

@@ -727,6 +727,13 @@ gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
       src->seek_happened = TRUE;
       src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
       break;
+    case GST_EVENT_SIZE:
+      if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
+	return FALSE;
+      }
+      src->block_size = GST_EVENT_SIZE_VALUE (event);
+      g_object_notify (G_OBJECT (src), "blocksize");  
+      break;
     case GST_EVENT_FLUSH:
       src->need_flush = TRUE;
       break;