From e331e6b94ff10325c2569cb8f1b5469ebed46f4f Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sun, 1 May 2005 09:23:31 +0000
Subject: Prevent segfault when filter chain is empty (e.g. because all filters
 returned AF_DETACH). Fixes bugzilla bug #293.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15313 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libaf/af.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'libaf/af.c')

diff --git a/libaf/af.c b/libaf/af.c
index 5fffde13b1..33542a3c57 100644
--- a/libaf/af.c
+++ b/libaf/af.c
@@ -368,6 +368,11 @@ int af_init(af_stream_t* s, int force_output)
   if(AF_OK != af_reinit(s,s->first))
     return -1;
 
+  // make sure the chain is not empty and valid (e.g. because of AF_DETACH)
+  if (!s->first)
+    if (!af_append(s,s->first,"dummy") || AF_OK != af_reinit(s,s->first))
+      return -1;
+
   // If force_output isn't set do not compensate for output format
   if(!force_output){
     memcpy(&s->output, s->last->data, sizeof(af_data_t));
-- 
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