[FFmpeg-cvslog] mpeg2dec: Fix lowres 3

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun May 22 03:30:01 2011 +0200| [33adcdb53118df8f281742b75adf861cda64801a] | committer: Michael Niedermayer

mpeg2dec: Fix lowres 3

Fixes ticket212

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=33adcdb53118df8f281742b75adf861cda64801a
---

 libavcodec/mpegvideo.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 0a0a11e..d210865 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -1722,8 +1722,10 @@ static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
     if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
         uvsx= (uvsx << 2) >> lowres;
         uvsy= (uvsy << 2) >> lowres;
-        pix_op[op_index](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
-        pix_op[op_index](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
+        if(h >> s->chroma_y_shift){
+            pix_op[op_index](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
+            pix_op[op_index](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
+        }
     }
     //FIXME h261 lowres loop filter
 }