From d037d797a4e1b5518839a03c004b65df860b9ebe Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier.adi@gmail.com>
Date: Thu, 28 Dec 2006 00:32:06 +0000
Subject: [PATCH] fall back mmap() call using MAP_PRIVATE for working on no-mmu
 systems patch by Mike Frysinger   vapier.adi _at_ gmail.com

Originally committed as revision 7380 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/grab.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libavformat/grab.c b/libavformat/grab.c
index 2b7c5502c6..99cbe2fefa 100644
--- a/libavformat/grab.c
+++ b/libavformat/grab.c
@@ -219,8 +219,11 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
     } else {
         s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);
         if ((unsigned char*)-1 == s->video_buf) {
-            perror("mmap");
-            goto fail;
+            s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_PRIVATE,video_fd,0);
+            if ((unsigned char*)-1 == s->video_buf) {
+                perror("mmap");
+                goto fail;
+            }
         }
         s->gb_frame = 0;
         s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;