Module: libav
Branch: release/10
Commit: 5df52b0131d3d4d804ad6e221bc9a2cd8b201ef2
Author: Keiji Costantini <stri...@gmail.com>
Committer: Reinhard Tartler <siret...@tauware.de>
Date: Sat Mar 1 18:17:04 2014 +0000
ituh263: reject b-frame with pp_time = 0
Avoid a division by 0 in ff_mpeg4_set_one_direct_mv.
Sample-Id: 00000168-google
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Vittorio Giovara <vittorio.giov...@gmail.com>
(cherry picked from commit 9514440337875e0c63b409abcd616b68c518283f)
---
libavcodec/ituh263dec.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index e365210..98c8cfc 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -750,6 +750,8 @@ int ff_h263_decode_mb(MpegEncContext *s,
}
if(IS_DIRECT(mb_type)){
+ if (!s->pp_time)
+ return AVERROR_INVALIDDATA;
s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
mb_type |= ff_mpeg4_set_direct_mv(s, 0, 0);
}else{
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