extend/modify PresentationInfo to make searching for routes via Session::get_remote_n...

[ardour.git] / libs / ardour / ardour / latent.h

diff --git a/libs/ardour/ardour/latent.h b/libs/ardour/ardour/latent.h
index 11bdf11370ebb09438c1085ab598124554508b61..bd639a865135c1e05fabe91f7c0f6cc21749dbcf 100644 (file)
--- a/libs/ardour/ardour/latent.h
+++ b/libs/ardour/ardour/latent.h
@@ -1,24 +1,50 @@
+/*
+    Copyright (C) 1999-2009 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
 #ifndef __ardour_latent_h__
 #define __ardour_latent_h__
 
-#include <ardour/types.h>
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
 
 namespace ARDOUR {
 
-class Latent {
+class LIBARDOUR_API Latent {
   public:
-       Latent() : _own_latency (0), _user_latency (0) {}
+       Latent() : _user_latency (0) {}
        virtual ~Latent() {}
 
-       virtual nframes_t signal_latency() const = 0;
-       nframes_t user_latency () const { return _user_latency; }
+       virtual framecnt_t signal_latency() const = 0;
+       framecnt_t user_latency () const { return _user_latency; }
+
+       framecnt_t effective_latency() const {
+               if (_user_latency) {
+                       return _user_latency;
+               } else {
+                       return signal_latency ();
+               }
+       }
 
-       virtual void set_latency_delay (nframes_t val) { _own_latency = val; }
-       virtual void set_user_latency (nframes_t val) { _user_latency = val; }
+       virtual void set_user_latency (framecnt_t val) { _user_latency = val; }
 
   protected:
-       nframes_t           _own_latency;
-       nframes_t           _user_latency;
+       framecnt_t           _user_latency;
 };
 
 }