Returns (i.e. sidechains).

And lo, upon the revision of our hoarde 5061, was the last Big Feature
committed to Three Poino, who, now more than ever, lurks imposingly on
the sidelines, heir to the throne, and eventual ruler of the realm.
His eventual succession all but guaranteed, only time and the number
of heads that must roll remain mysteries.


git-svn-id: svn://localhost/ardour2/branches/3.0@5061 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 71 insertions, 0 deletions

diff --git a/libs/ardour/ardour/return.h b/libs/ardour/ardour/return.h
new file mode 100644
index 0000000000..af55df59ed
--- /dev/null
+++ b/libs/ardour/ardour/return.h
@@ -0,0 +1,71 @@
+/*
+    Copyright (C) 2009 Paul Davis 
+    Author: Dave Robillard
+
+    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_return_h__
+#define __ardour_return_h__
+
+#include <sigc++/signal.h>
+#include <string>
+
+
+#include "pbd/stateful.h" 
+#include "ardour/ardour.h"
+#include "ardour/audioengine.h"
+#include "ardour/io_processor.h"
+
+namespace ARDOUR {
+
+class Return : public IOProcessor 
+{
+public:	
+	Return (Session&);
+	Return (Session&, const XMLNode&);
+	virtual ~Return ();
+	
+	uint32_t bit_slot() const { return _bitslot; }
+
+	void run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes);
+	
+	void activate() {}
+	void deactivate () {}
+
+	XMLNode& state(bool full);
+	XMLNode& get_state(void);
+	int      set_state(const XMLNode& node);
+
+	uint32_t pans_required() const { return _configured_input.n_audio(); }
+
+	bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const;
+	bool configure_io (ChanCount in, ChanCount out);
+
+	static uint32_t how_many_sends();
+	static void make_unique (XMLNode &, Session &);
+
+private:
+	/* disallow copy construction */
+	Return (const Return&);
+	
+	uint32_t  _bitslot;
+};
+
+} // namespace ARDOUR
+
+#endif /* __ardour_return_h__ */
+