From 8aa57b7b5e06c1cd9dbb2e84e48caa0ef840c5dc Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 22 Apr 2012 15:32:58 +0200
Subject: [PATCH] audemux: Check channels isnt 0

Fixes a division by 0

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavformat/au.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/au.c b/libavformat/au.c
index 67e6cab181..bec0d7641b 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -150,6 +150,11 @@ static int au_read_header(AVFormatContext *s)
         return AVERROR_INVALIDDATA;
     }
 
+    if (channels <= 0) {
+        av_log(s, AV_LOG_ERROR, "Invalid number of channels %d\n", channels);
+        return AVERROR_INVALIDDATA;
+    }
+
     if (size >= 24) {
         /* skip unused data */
         avio_skip(pb, size - 24);