From: Andreas Öman <andreas@lonelycoder.com>
Date: Sun, 7 Nov 2010 22:43:24 +0000 (+0000)
Subject: Avoid division by zero if h264 width and/or height is 0. (Happens on corrupt data)
X-Git-Tag: 2.12~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0cd90a86100db1871a83073ebf9c08f218173e3d;p=thirdparty%2Ftvheadend.git

Avoid division by zero if h264 width and/or height is 0. (Happens on corrupt data)
---

diff --git a/src/parser_h264.c b/src/parser_h264.c
index 383304900..7f31f2362 100644
--- a/src/parser_h264.c
+++ b/src/parser_h264.c
@@ -412,10 +412,12 @@ h264_decode_slice_header(th_stream_t *st, bitstream_t *bs, int *pkttype,
 
     int w = p->sps[sps_id].aspect_num * st->st_width;
     int h = p->sps[sps_id].aspect_den * st->st_height;
-    int d = gcd(w, h);
 
-    st->st_aspect_num = w / d;
-    st->st_aspect_den = h / d;
+    if(w & h) { 
+      int d = gcd(w, h);
+      st->st_aspect_num = w / d;
+      st->st_aspect_den = h / d;
+    }
 
   } else {
     st->st_aspect_num = 0;