From 4c01b868de80e94a5619370e02f8d45dde4007b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Schieli?= <cschieli@gmail.com>
Date: Tue, 17 Mar 2009 19:51:52 +0000
Subject: [PATCH] Don't write outside of the picture buffer in planarCopy in
 the gray case

Originally committed as revision 28985 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
---
 libswscale/swscale.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index c6012c15b7..8728e2bb6c 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -1934,8 +1934,14 @@ static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSli
 
         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)
         {
-            if (!isGray(c->dstFormat))
-                memset(dst[plane], 128, dstStride[plane]*height);
+            if (!isGray(c->dstFormat)){
+                int i;
+                uint8_t *ptr = dst[plane] + dstStride[plane]*y;
+                for (i=0; i<height; i++){
+                    memset(ptr, 128, length);
+                    ptr += dstStride[plane];
+                }
+            }
         }
         else
         {