From 008f872f614e6646c5b1fc8888e40bea4796eb5f Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Sun, 24 Jan 2010 23:55:33 +0000
Subject: [PATCH] Only check frame size if the header is valid.

Originally committed as revision 21439 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/ac3dec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index ba7ae16711..8b78a0a50c 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -1237,7 +1237,7 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
     err = parse_frame_header(s);
 
     /* check that reported frame size fits in input buffer */
-    if(s->frame_size > buf_size) {
+    if(!err && s->frame_size > buf_size) {
         av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
         err = AAC_AC3_PARSE_ERROR_FRAME_SIZE;
     }