[FFmpeg-cvslog] vc1dec: Factorize srcU/V offseting

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon Nov 12 01:34:44 2012 +0100| [19673db34aa0fb014a07cb3e72970c1c0aeeeac1] | committer: Martin Storsjö

vc1dec: Factorize srcU/V offseting

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=19673db34aa0fb014a07cb3e72970c1c0aeeeac1
---

 libavcodec/vc1dec.c |   19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index b07214a..838ebee 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -846,21 +846,24 @@ static void vc1_mc_4mv_chroma(VC1Context *v, int dir)
     if (!dir) {
         if (v->field_mode) {
             if ((v->cur_field_type != chroma_ref_type) && v->cur_field_type) {
-                srcU = s->current_picture.f.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
-                srcV = s->current_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
+                srcU = s->current_picture.f.data[1];
+                srcV = s->current_picture.f.data[2];
             } else {
-                srcU = s->last_picture.f.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
-                srcV = s->last_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
+                srcU = s->last_picture.f.data[1];
+                srcV = s->last_picture.f.data[2];
             }
         } else {
-            srcU = s->last_picture.f.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
-            srcV = s->last_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
+            srcU = s->last_picture.f.data[1];
+            srcV = s->last_picture.f.data[2];
         }
     } else {
-        srcU = s->next_picture.f.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
-        srcV = s->next_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
+        srcU = s->next_picture.f.data[1];
+        srcV = s->next_picture.f.data[2];
     }
 
+    srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
+    srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
+
     if (v->field_mode) {
         if (chroma_ref_type) {
             srcU += s->current_picture_ptr->f.linesize[1];