From 5be5daf1e5929192650dc17eab02c26447df13d1 Mon Sep 17 00:00:00 2001
From: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Date: Sun, 5 Jul 2009 12:14:05 +0000
Subject: Check that palctrl is available on init instead of crashing when
 trying to use it on decode. Fixes mpeg2/smclockmpeg2.avi.2.1 from issue 1240.

Originally committed as revision 19347 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/qpeg.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'libavcodec/qpeg.c')

diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c
index 20f166329d..6b5d8732d9 100644
--- a/libavcodec/qpeg.c
+++ b/libavcodec/qpeg.c
@@ -289,6 +289,10 @@ static int decode_frame(AVCodecContext *avctx,
 static av_cold int decode_init(AVCodecContext *avctx){
     QpegContext * const a = avctx->priv_data;
 
+    if (!avctx->palctrl) {
+        av_log(avctx, AV_LOG_FATAL, "Missing required palette via palctrl\n");
+        return -1;
+    }
     a->avctx = avctx;
     avctx->pix_fmt= PIX_FMT_PAL8;
     a->refdata = av_malloc(avctx->width * avctx->height);
-- 
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