From 95e3fdb846847dd91d3a04bebbdefcab48813d83 Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Wed, 16 Jan 2008 17:07:34 +0000
Subject: [PATCH] pqindex=0 is forbidden

Originally committed as revision 11540 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/vc1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 46987c8b48..86ca7b978b 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -1065,6 +1065,7 @@ static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
 
     /* Quantizer stuff */
     pqindex = get_bits(gb, 5);
+    if(!pqindex) return -1;
     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
         v->pq = ff_vc1_pquant_table[0][pqindex];
     else
@@ -1301,6 +1302,7 @@ static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
         }
     }
     pqindex = get_bits(gb, 5);
+    if(!pqindex) return -1;
     v->pqindex = pqindex;
     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
         v->pq = ff_vc1_pquant_table[0][pqindex];