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avcodec/h264_direct: Fix runtime error: left shift of negative value -14 

Fixes: 682/clusterfuzz-testcase-4799120021651456

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-02-28 03:13:24 +01:00
parent 2c00b37302
commit 4bd3f1ce3e
1 changed files with 1 additions and 1 deletions
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2
libavcodec/h264_direct.c
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@ -614,7 +614,7 @@ single_col:
{
const int16_t *mv_col = l1mv[x8 * 3 + y8 * b4_stride];
int my_col = (mv_col[1] << y_shift) / 2;
int my_col = (mv_col[1] * (1 << y_shift)) / 2;
int mx = (scale * mv_col[0] + 128) >> 8;
int my = (scale * my_col + 128) >> 8;
fill_rectangle(&sl->mv_cache[0][scan8[i8 * 4]], 2, 2, 8,