ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Mon Nov 5 22:46:43 2018 +0100| [07bc603757caa5d2054c56629bb93d7a177e8e88] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=07bc603757caa5d2054c56629bb93d7a177e8e88 --- libavcodec/qpeg.c | 6 ++++++ 1 file changed, 6 insertions(+) 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; } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
