From 6cfe51d9dab860515bf1bb6fb703dd5bddeeb4e7 Mon Sep 17 00:00:00 2001
From: Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
Date: Fri, 16 Jul 2004 18:36:39 +0000
Subject: [PATCH] Avoid segfault on ffmpeg "buffer flush" in mpeg12.c patch by
 (Wolfram Gloger <wmglo at dent dot med dot uni-muenchen dot de>)

Originally committed as revision 3324 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mpeg12.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 9acdd2ee4e..5a2df29343 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -2769,12 +2769,14 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
     MpegEncContext *s2 = &s->mpeg_enc_ctx;
     dprintf("fill_buffer\n");
 
-    /* special case for last picture */
-    if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
-        *picture= *(AVFrame*)s2->next_picture_ptr;
-        s2->next_picture_ptr= NULL;
+    if (buf_size == 0) {
+	/* special case for last picture */
+	if (s2->low_delay==0 && s2->next_picture_ptr) {
+	    *picture= *(AVFrame*)s2->next_picture_ptr;
+	    s2->next_picture_ptr= NULL;
 
-        *data_size = sizeof(AVFrame);
+	    *data_size = sizeof(AVFrame);
+	}
         return 0;
     }