tentative commit of new panners subtree

git-svn-id: svn://localhost/ardour2/branches/3.0@8521 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 85 insertions, 0 deletions

diff --git a/libs/panners/2in2out/panner_2in2out.h b/libs/panners/2in2out/panner_2in2out.h
new file mode 100644
index 0000000000..8d8d57d709
--- /dev/null
+++ b/libs/panners/2in2out/panner_2in2out.h
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+/*
+    Copyright (C) 2004-2011 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_panner_2in2out_h__
+#define __ardour_panner_2in2out_h__
+
+#include <cmath>
+#include <cassert>
+#include <vector>
+#include <string>
+#include <iostream>
+
+#include "pbd/stateful.h"
+#include "pbd/controllable.h"
+#include "pbd/cartesian.h"
+
+#include "ardour/automation_control.h"
+#include "ardour/automatable.h"
+#include "ardour/panner.h"
+#include "ardour/types.h"
+
+namespace ARDOUR {
+
+class Panner2in2out : public Panner
+{
+  public:
+	Panner2in2out (boost::shared_ptr<Pannable>);
+	~Panner2in2out ();
+
+        ChanCount in() const { return ChanCount (DataType::AUDIO, 2); }
+        ChanCount out() const { return ChanCount (DataType::AUDIO, 2); }
+
+        bool clamp_position (double&);
+        bool clamp_width (double&);
+
+        void set_position (double);
+        void set_width (double);
+
+        double position () const;
+        double width () const;
+
+	static Panner* factory (boost::shared_ptr<Pannable>, Speakers&);
+
+	XMLNode& state (bool full_state); 
+	XMLNode& get_state (void); 
+	int      set_state (const XMLNode&, int version);
+
+        void update ();
+
+  protected:
+	float left[2];
+	float right[2];
+	float desired_left[2];
+	float desired_right[2];
+	float left_interp[2];
+	float right_interp[2];
+
+  private:
+        bool clamp_stereo_pan (double& direction_as_lr_fract, double& width);
+        
+        void distribute_one (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, pframes_t nframes, uint32_t which);
+        void distribute_one_automated (AudioBuffer& srcbuf, BufferSet& obufs,
+                                       framepos_t start, framepos_t end, pframes_t nframes,
+                                       pan_t** buffers, uint32_t which);
+};
+
+} // namespace
+
+#endif /* __ardour_panner_2in2out_h__ */