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svq1dec: use sign_extend()

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Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-11-26 15:16:29 +00:00
parent 171ec81223
commit e4faa31a0a
1 changed files with 2 additions and 2 deletions
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4
libavcodec/svq1dec.c
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@ -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;