[FFmpeg-cvslog] audemux: Check channels isnt 0

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Apr 22 15:32:58 2012 +0200| [8aa57b7b5e06c1cd9dbb2e84e48caa0ef840c5dc] | committer: Michael Niedermayer

audemux: Check channels isnt 0

Fixes a division by 0

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8aa57b7b5e06c1cd9dbb2e84e48caa0ef840c5dc
---

 libavformat/au.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/libavformat/au.c b/libavformat/au.c
index 67e6cab..bec0d76 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);