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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-11-05 22:46:43 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-11-08 22:40:46 +0100 |
| commit | 07bc603757caa5d2054c56629bb93d7a177e8e88 (patch) | |
| tree | d7cdeee34aaa995ce8746fcd5881f66009a70f5d /libavcodec/qpeg.c | |
| parent | ff3b4f91cd56896366a044f8e45a88956dd66d39 (diff) | |
| download | ffmpeg-07bc603757caa5d2054c56629bb93d7a177e8e88.tar.gz | |
avcodec/qpeg: Optimize full width runs in qpeg_decode_intra()
This improves the speed of decoding large patches of constant color
Fixes: Timeout
Fixes: 10967/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QPEG_fuzzer-5630803793936384
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/qpeg.c')
| -rw-r--r-- | libavcodec/qpeg.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c index e1210c1972..cb452621e7 100644 --- a/libavcodec/qpeg.c +++ b/libavcodec/qpeg.c @@ -85,6 +85,12 @@ static void qpeg_decode_intra(QpegContext *qctx, uint8_t *dst, filled = 0; dst -= stride; rows_to_go--; + while (run - i > width && rows_to_go > 0) { + memset(dst, p, width); + dst -= stride; + rows_to_go--; + i += width; + } if(rows_to_go <= 0) break; } |