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avcodec/hevcdsp_template: Fix Invalid shifts in put_hevc_qpel_bi_w_h() and put_hevc_qpel_bi_w_w() 

Fixes: left shift of negative value -1
Fixes: 4690/clusterfuzz-testcase-minimized-6117482428366848

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 d135f3c514)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-12-26 23:24:45 +01:00
parent 5d18394d08
commit c745358efe
1 changed files with 2 additions and 2 deletions
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4
libavcodec/hevcdsp_template.c
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@ -965,7 +965,7 @@ static void FUNC(put_hevc_qpel_bi_w_h)(uint8_t *_dst, ptrdiff_t _dststride, uint
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
dst[x] = av_clip_pixel(((QPEL_FILTER(src, 1) >> (BIT_DEPTH - 8)) * wx1 + src2[x] * wx0 +
((ox0 + ox1 + 1) << log2Wd)) >> (log2Wd + 1));
((ox0 + ox1 + 1) * (1 << log2Wd))) >> (log2Wd + 1));
src += srcstride;
dst += dststride;
src2 += MAX_PB_SIZE;
@ -1020,7 +1020,7 @@ static void FUNC(put_hevc_qpel_bi_w_v)(uint8_t *_dst, ptrdiff_t _dststride, uint
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
dst[x] = av_clip_pixel(((QPEL_FILTER(src, srcstride) >> (BIT_DEPTH - 8)) * wx1 + src2[x] * wx0 +
((ox0 + ox1 + 1) << log2Wd)) >> (log2Wd + 1));
((ox0 + ox1 + 1) * (1 << log2Wd))) >> (log2Wd + 1));
src += srcstride;
dst += dststride;
src2 += MAX_PB_SIZE;