From 9514440337875e0c63b409abcd616b68c518283f Mon Sep 17 00:00:00 2001
From: Keiji Costantini <strites@gmail.com>
Date: Sat, 1 Mar 2014 18:17:04 +0000
Subject: 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.giovara@gmail.com>
---
 libavcodec/ituh263dec.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'libavcodec/ituh263dec.c')

diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index e36521062f..98c8cfc137 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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