From ec0965be36b55624a03d20c3b24e6a7aa61d6cd2 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 30 Mar 2012 19:18:42 +0200
Subject: [PATCH] cavsdec: ensure the tables have been allocated before using
 them

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/cavsdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/cavsdec.c b/libavcodec/cavsdec.c
index 8f87d5abcd..77b7abf5ba 100644
--- a/libavcodec/cavsdec.c
+++ b/libavcodec/cavsdec.c
@@ -697,6 +697,8 @@ static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size,
             *data_size = 0;
             if(!h->got_keyframe)
                 break;
+            if(!h->top_qp)
+                break;
             init_get_bits(&s->gb, buf_ptr, input_size);
             h->stc = stc;
             if(decode_pic(h))