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avcodec/ffv1dec_template: Optimize golomb run mode

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Fixes: Timeout (34sec -> 12sec)
Fixes: 13398/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFV1_fuzzer-5664106709778432

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-03-08 13:05:13 +01:00
parent d15117c996
commit efe4aef90f
1 changed files with 5 additions and 0 deletions
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5
libavcodec/ffv1dec_template.c
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@ -86,6 +86,11 @@ static av_always_inline int RENAME(decode_line)(FFV1Context *s, int w,
run_mode = 2;
}
}
while (run_count > 1 && w-x > 1) {
sample[1][x] = RENAME(predict)(sample[1] + x, sample[0] + x);
x++;
run_count--;
}
run_count--;
if (run_count < 0) {
run_mode = 0;