From 2e70e4aa570d02cc9d32a775ba9accdff3901181 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Mon, 5 Dec 2005 00:15:51 +0000
Subject: [PATCH] ogg format probe function by Ivo <ivop at euronet nl>

Originally committed as revision 4719 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/ogg2.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/libavformat/ogg2.c b/libavformat/ogg2.c
index e6da34e816..8e00946826 100644
--- a/libavformat/ogg2.c
+++ b/libavformat/ogg2.c
@@ -622,11 +622,23 @@ ogg_read_timestamp (AVFormatContext * s, int stream_index, int64_t * pos_arg,
 }
 #endif
 
+static int ogg_probe(AVProbeData *p)
+{
+    if (p->buf_size < 6)
+        return 0;
+    if (p->buf[0] == 'O' && p->buf[1] == 'g' &&
+        p->buf[2] == 'g' && p->buf[3] == 'S' &&
+        p->buf[4] == 0x0 && p->buf[5] <= 0x7 )
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
 static AVInputFormat ogg_iformat = {
     "ogg",
     "Ogg",
     sizeof (ogg_t),
-    NULL,
+    ogg_probe,
     ogg_read_header,
     ogg_read_packet,
     ogg_read_close,