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avcodec/mjpegdec: Fix negative shift

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Fixes: mjpeg_left_shift.avi

Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d86d7b2486)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-01-10 15:52:09 +01:00
parent 4c6b48a08e
commit e2285e7cc8
1 changed files with 1 additions and 1 deletions
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2
libavcodec/mjpegdec.c
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@ -975,7 +975,7 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int p
return -1;
left[i] = buffer[mb_x][i] =
mask & (pred + (dc << point_transform));
mask & (pred + (dc * (1 << point_transform)));
}
if (s->restart_interval && !--s->restart_count) {