ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Tue Feb 19 19:05:10 2019 +0100| [976dae8b32f48d17cccfd6b19d2beb01770dfa7c] | committer: Michael Niedermayer
avcodec/wcmv: Avoid copying frames if they are unchanged Improves speed of the testcase by about a factor of 10 Fixes: Timeout Fixes: 13132/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5664190616829952 Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=976dae8b32f48d17cccfd6b19d2beb01770dfa7c --- libavcodec/wcmv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/wcmv.c b/libavcodec/wcmv.c index f03761b343..2988c15b23 100644 --- a/libavcodec/wcmv.c +++ b/libavcodec/wcmv.c @@ -56,11 +56,13 @@ static int decode_frame(AVCodecContext *avctx, } bytestream2_init(&gb, avpkt->data, avpkt->size); + blocks = bytestream2_get_le16(&gb); + if (!blocks) + return avpkt->size; if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) return ret; - blocks = bytestream2_get_le16(&gb); if (blocks > 5) { GetByteContext bgb; int x = 0, size; _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
