From 06be075cda0a6ba8bab8f543571b380884f562ac Mon Sep 17 00:00:00 2001
From: Laurent Aimar <fenrir@videolan.org>
Date: Tue, 27 Sep 2011 22:15:32 +0000
Subject: [PATCH] xan: Prevent NULL dereferences with missing reference frame
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
---
libavcodec/xan.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index f21075c3bfb..9e58a77f193 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -224,6 +224,8 @@ static inline void xan_wc3_copy_pixel_run(XanContext *s,
palette_plane = s->current_frame.data[0];
prev_palette_plane = s->last_frame.data[0];
+ if (!prev_palette_plane)
+ prev_palette_plane = palette_plane;
stride = s->current_frame.linesize[0];
line_inc = stride - width;
curframe_index = y * stride + x;
--
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