From 7824b129a048c8cfb944fe1e6ffefddf1c16eaf4 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 12 Apr 2009 13:58:03 +0000
Subject: [PATCH] Assert that the first list1 entry is a reference frame.

Originally committed as revision 18471 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/h264.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index ff6ff567bd..ce5c71b18a 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -993,6 +993,8 @@ static inline void pred_direct_motion(H264Context * const h, int *mb_type){
     unsigned int sub_mb_type;
     int i8, i4;
 
+    assert(h->ref_list[1][0].reference&3);
+
 #define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
 
     if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL