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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-29 19:20:29 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-30 18:47:21 +0100 |
| commit | 20916f9bc4534678a87684994377c181d8aa16bc (patch) | |
| tree | 9953bdc0fd187bafc504a33c9cbc602e24d94be4 | |
| parent | 6e8e8431e15a58aa44cfdd8c11f9ea096837c0fa (diff) | |
| download | ffmpeg-20916f9bc4534678a87684994377c181d8aa16bc.tar.gz | |
avcodec/screenpresso: Optimize sum_delta_flipped()
553 -> 332 sec
Testcase: 20280/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCREENPRESSO_fuzzer-6238663432470528
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/screenpresso.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/screenpresso.c b/libavcodec/screenpresso.c index 5fac100897..d73c24df83 100644 --- a/libavcodec/screenpresso.c +++ b/libavcodec/screenpresso.c @@ -94,8 +94,9 @@ static void sum_delta_flipped(uint8_t *dst, int dst_linesize, { int i; for (; height > 0; height--) { + const uint8_t *src1 = &src[(height - 1) * src_linesize]; for (i = 0; i < bytewidth; i++) - dst[i] += src[(height - 1) * src_linesize + i]; + dst[i] += src1[i]; dst += dst_linesize; } } |