wtay gstreamer: gstreamer/ gstreamer/libs/gst/base/

CVS Root:       /cvs/gstreamer
Module:         gstreamer
Changes by:     wtay
Date:           Mon Dec 08 2008  18:35:59 UTC

Log message:
* libs/gst/base/gstbasetransform.c:
(gst_base_transform_prepare_output_buffer),
(gst_base_transform_getrange), (gst_base_transform_chain):
* libs/gst/base/gstbasetransform.h:
Add vmethod that is called before we start the transform and which can
be used to configure the transform, such as dynamic properties.

Modified files:
    .               : ChangeLog
    libs/gst/base   : gstbasetransform.c gstbasetransform.h

Links:
http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gstreamer/ChangeLog.diff?r1=1.4182&r2=1.4183
http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gstreamer/libs/gst/base/gstbasetransform.c.diff?r1=1.132&r2=1.133
http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gstreamer/libs/gst/base/gstbasetransform.h.diff?r1=1.40&r2=1.41

====Begin Diffs====
Index: ChangeLog
===================================================================
RCS file: /cvs/gstreamer/gstreamer/ChangeLog,v
retrieving revision 1.4182
retrieving revision 1.4183
diff -u -d -r1.4182 -r1.4183
--- ChangeLog	5 Dec 2008 20:32:01 -0000	1.4182
+++ ChangeLog	8 Dec 2008 18:35:42 -0000	1.4183
@@ -1,3 +1,12 @@
+2008-12-08  Wim Taymans  <[email protected]>
+
+	* libs/gst/base/gstbasetransform.c:
+	(gst_base_transform_prepare_output_buffer),
+	(gst_base_transform_getrange), (gst_base_transform_chain):
+	* libs/gst/base/gstbasetransform.h:
+	Add vmethod that is called before we start the transform and which can
+	be used to configure the transform, such as dynamic properties.
 2008-12-05  David Schleef  <[email protected]>
 
 	* gst/gst.c:
Index: gstbasetransform.c
RCS file: /cvs/gstreamer/gstreamer/libs/gst/base/gstbasetransform.c,v
retrieving revision 1.132
retrieving revision 1.133
diff -u -d -r1.132 -r1.133
--- gstbasetransform.c	24 Nov 2008 15:27:55 -0000	1.132
+++ gstbasetransform.c	8 Dec 2008 18:35:44 -0000	1.133
@@ -1185,6 +1185,7 @@
       /* only discard it when the input was not writable, otherwise, we reuse
        * the input buffer. */
       discard = gst_buffer_is_writable (in_buf);
+      GST_DEBUG_OBJECT (trans, "discard: %d", discard);
     } else {
       GST_DEBUG_OBJECT (trans, "getting output size for copy transform");
       /* copy transform, figure out the output size */
@@ -1948,6 +1949,7 @@
     guint length, GstBuffer ** buffer)
 {
   GstBaseTransform *trans;
+  GstBaseTransformClass *klass;
   GstFlowReturn ret;
   GstBuffer *inbuf;
@@ -1957,6 +1959,10 @@
   if (G_UNLIKELY (ret != GST_FLOW_OK))
     goto pull_error;
+  klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+  if (klass->before_transform)
+    klass->before_transform (trans, inbuf);
   GST_BASE_TRANSFORM_LOCK (trans);
   ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
   GST_BASE_TRANSFORM_UNLOCK (trans);
@@ -1979,6 +1985,7 @@
 gst_base_transform_chain (GstPad * pad, GstBuffer * buffer)
   GstClockTime last_stop = GST_CLOCK_TIME_NONE;
   GstBuffer *outbuf = NULL;
@@ -1993,6 +2000,10 @@
       last_stop = GST_BUFFER_TIMESTAMP (buffer);
   }
+    klass->before_transform (trans, buffer);
   /* protect transform method and concurrent buffer alloc */
   ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
Index: gstbasetransform.h
RCS file: /cvs/gstreamer/gstreamer/libs/gst/base/gstbasetransform.h,v
retrieving revision 1.40
retrieving revision 1.41
diff -u -d -r1.40 -r1.41
--- gstbasetransform.h	20 Aug 2008 10:52:09 -0000	1.40
+++ gstbasetransform.h	8 Dec 2008 18:35:44 -0000	1.41
@@ -182,6 +182,10 @@
  *                         analysis can return a subbuffer or even just
  *                         increment the reference to the input buffer (if in
  *                         passthrough mode)
+ * @before_transform: Optional. Since 0.10.22
+ *                    This method is called right before the base class will
+ *                    start processing. Dynamic properties or other delayed
+ *                    configuration could be performed in this method.
  *
  * Subclasses can override any of the available virtual methods or not, as
  * needed. At minimum either @transform or @transform_ip need to be overridden.
@@ -231,8 +235,10 @@
   /* src event */
   gboolean      (*src_event)      (GstBaseTransform *trans, GstEvent *event);
+  void          (*before_transform)  (GstBaseTransform *trans, GstBuffer *buffer);
   /*< private >*/
-  gpointer       _gst_reserved[GST_PADDING_LARGE - 1];
+  gpointer       _gst_reserved[GST_PADDING_LARGE - 2];
 };
 GType           gst_base_transform_get_type         (void);

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