From 190c074cc1508c0aa429452ea920f8f94ef0d0f2 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 4 Apr 2013 00:13:27 +0100
Subject: More various bits.

---
 src/lib/video_source.cc | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'src/lib/video_source.cc')

diff --git a/src/lib/video_source.cc b/src/lib/video_source.cc
index 56742e2b4..8101a6d36 100644
--- a/src/lib/video_source.cc
+++ b/src/lib/video_source.cc
@@ -21,10 +21,23 @@
 #include "video_sink.h"
 
 using boost::shared_ptr;
+using boost::weak_ptr;
 using boost::bind;
 
+static void
+process_video_proxy (weak_ptr<VideoSink> sink, shared_ptr<Image> i, bool same, shared_ptr<Subtitle> s)
+{
+	boost::shared_ptr<VideoSink> p = sink.lock ();
+	if (p) {
+		p->process_video (i, same, s);
+	}
+}
+
 void
 VideoSource::connect_video (shared_ptr<VideoSink> s)
 {
-	Video.connect (bind (&VideoSink::process_video, s, _1, _2, _3));
+	/* If we bind, say, a Playlist (as the VideoSink) to a Decoder (which is owned
+	   by the Playlist) we create a cycle.  Use a weak_ptr to break it.
+	*/
+	Video.connect (bind (process_video_proxy, boost::weak_ptr<VideoSink> (s), _1, _2, _3));
 }
-- 
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