[FFmpeg-cvslog] svq1dec: use sign_extend()

[Mans Rullgard]

ffmpeg | branch: master | Mans Rullgard <mans at mansr.com> | Sat Nov 26 15:16:29 2011 +0000| [e4faa31a0a68dbff320b419a3a73d6b028d770d5] | committer: Mans Rullgard

svq1dec: use sign_extend()

Signed-off-by: Mans Rullgard <mans at mansr.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e4faa31a0a68dbff320b419a3a73d6b028d770d5
---

 libavcodec/svq1dec.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/svq1dec.c b/libavcodec/svq1dec.c
index a604f1d..8569615 100644
--- a/libavcodec/svq1dec.c
+++ b/libavcodec/svq1dec.c
@@ -317,9 +317,9 @@ static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv *mv, svq1_
 
     /* add median of motion vector predictors and clip result */
     if (i == 1)
-      mv->y = ((diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26;
+      mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6);
     else
-      mv->x = ((diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26;
+      mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6);
   }
 
   return 0;