1 /*
2  * Copyright (C) 2011-2012 Carl Hetherington <carl@carlh.net>
3  * Copyright (C) 2011-2017 Paul Davis <paul@linuxaudiosystems.com>
4  * Copyright (C) 2013 John Emmas <john@creativepost.co.uk>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with this program; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #ifndef __ardour_panner_1in2out_h__
22 #define __ardour_panner_1in2out_h__
23 
24 #include <cassert>
25 #include <cmath>
26 #include <iostream>
27 #include <string>
28 #include <vector>
29 
30 #include "pbd/cartesian.h"
31 #include "pbd/controllable.h"
32 #include "pbd/stateful.h"
33 
34 #include "ardour/panner.h"
35 #include "ardour/types.h"
36 
37 namespace ARDOUR
38 {
39 
40 class Panner1in2out : public Panner
41 {
42 public:
43 	Panner1in2out (boost::shared_ptr<Pannable>);
44 	~Panner1in2out ();
45 
46 	void                      set_position (double);
47 	bool                      clamp_position (double&);
48 	std::pair<double, double> position_range () const;
49 
50 	double position () const;
51 
in()52 	ChanCount in () const
53 	{
54 		return ChanCount (DataType::AUDIO, 1);
55 	}
56 
out()57 	ChanCount out () const
58 	{
59 		return ChanCount (DataType::AUDIO, 2);
60 	}
61 
62 	static Panner* factory (boost::shared_ptr<Pannable>, boost::shared_ptr<Speakers>);
63 
64 	std::string value_as_string (boost::shared_ptr<const AutomationControl>) const;
65 
66 	XMLNode& get_state ();
67 
68 	void reset ();
69 
70 protected:
71 	float left;
72 	float right;
73 	float desired_left;
74 	float desired_right;
75 	float left_interp;
76 	float right_interp;
77 
78 	void distribute_one (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, pframes_t nframes, uint32_t which);
79 	void distribute_one_automated (AudioBuffer& srcbuf, BufferSet& obufs,
80 	                               samplepos_t start, samplepos_t end, pframes_t nframes,
81 	                               pan_t** buffers, uint32_t which);
82 
83 	void update ();
84 };
85 
86 } // namespace ARDOUR
87 
88 #endif /* __ardour_panner_1in2out_h__ */
89