From a202541f9b4da3e489716198dd3547ec7f73ef1d Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Wed, 12 Dec 2012 00:11:15 +0100
Subject: [PATCH] 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>
---
libavformat/cafdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 718942bd8a7..f12226a8f53 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 {
--
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