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avcodec/proresenc_kostya: use unsigned alpha for rotation

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Fixes: left shift of negative value -208
Fixes: 69073/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PRORES_KS_fuzzer-4745020002336768

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2024-06-18 15:48:26 +02:00
parent f13ae63259
commit 93e0265e27
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1 changed files with 1 additions and 1 deletions
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libavcodec/proresenc_kostya.c
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@ -343,7 +343,7 @@ static void get_slice_data(ProresContext *ctx, const uint16_t *src,
static void get_alpha_data(ProresContext *ctx, const uint16_t *src, static void get_alpha_data(ProresContext *ctx, const uint16_t *src,
ptrdiff_t linesize, int x, int y, int w, int h, ptrdiff_t linesize, int x, int y, int w, int h,
int16_t *blocks, int mbs_per_slice, int abits) uint16_t *blocks, int mbs_per_slice, int abits)
{ {
const int slice_width = 16 * mbs_per_slice; const int slice_width = 16 * mbs_per_slice;
int i, j, copy_w, copy_h; int i, j, copy_w, copy_h;