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avcodec/hevc_filter: Fix invalid shift

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Fixes: runtime error: left shift of negative value -1

Fixes: 2299/clusterfuzz-testcase-minimized-4843509351710720

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d7b3d5c3f2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-20 14:38:34 +02:00
parent 6dca67f3a6
commit eb7ad56075
1 changed files with 1 additions and 1 deletions
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libavcodec/hevc_filter.c
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@ -471,7 +471,7 @@ static int get_pcm(HEVCContext *s, int x, int y)
#define TC_CALC(qp, bs) \
tctable[av_clip((qp) + DEFAULT_INTRA_TC_OFFSET * ((bs) - 1) + \
(tc_offset >> 1 << 1), \
(tc_offset & -2), \
0, MAX_QP + DEFAULT_INTRA_TC_OFFSET)]
static void deblocking_filter_CTB(HEVCContext *s, int x0, int y0)