From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 11 Dec 2012 23:11:15 +0000 (+0100)
Subject: cafdec: Check duration before use.
X-Git-Tag: android-x86-4.4-r1~7289
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a202541f9b4da3e489716198dd3547ec7f73ef1d;p=android-x86%2Fexternal-ffmpeg.git

cafdec: Check duration before use.

Fix division by 0

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---

diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 718942bd8a..f12226a8f5 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -312,7 +312,7 @@ static int read_header(AVFormatContext *s)
     if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
         if (caf->data_size > 0)
             st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;
-    } else if (st->nb_index_entries) {
+    } else if (st->nb_index_entries && st->duration > 0) {
         st->codec->bit_rate = st->codec->sample_rate * caf->data_size * 8 /
                               st->duration;
     } else {