videoscale: Use passthrough mode if width and height are not changed

It doesn't matter if the PAR changes or not, processing of every pixel
is only necessary when the width or height changes.

diff --git a/gst/videoscale/gstvideoscale.c b/gst/videoscale/gstvideoscale.c
index 06ea8b1..5ae058d 100644 (file)
--- a/gst/videoscale/gstvideoscale.c
+++ b/gst/videoscale/gstvideoscale.c
@@ -264,8 +264,6 @@ gst_video_scale_class_init (GstVideoScaleClass * klass)
   trans_class->transform = GST_DEBUG_FUNCPTR (gst_video_scale_transform);
   trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_scale_fixate_caps);
   trans_class->src_event = GST_DEBUG_FUNCPTR (gst_video_scale_src_event);
-
-  trans_class->passthrough_on_same_caps = TRUE;
 }
 
 static void
@@ -545,6 +543,10 @@ gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
   if (to_dar_n != from_dar_n || to_dar_d != from_dar_d)
     GST_WARNING_OBJECT (videoscale, "Can't keep DAR!");
 
+  gst_base_transform_set_passthrough (trans,
+      (videoscale->from_width == videoscale->to_width
+          && videoscale->from_height == videoscale->to_height));
+
   GST_DEBUG_OBJECT (videoscale, "from=%dx%d (par=%d/%d dar=%d/%d), size %d "
       "-> to=%dx%d (par=%d/%d dar=%d/%d), size %d",
       videoscale->from_width, videoscale->from_height, from_par_n, from_par_d,