avcodec/hevc_filter: Fix invalid shift

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>
8 years ago · d7b3d5c3f2
parent fdfbcbdd14
commit d7b3d5c3f2
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/hevc_filter.c
+++ b/libavcodec/hevc_filter.c
@ -470,7 +470,7 @@ 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)