/*
    Copyright (C) 2001 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_redirect_h__
#define __ardour_redirect_h__

#include <string>
#include <boost/shared_ptr.hpp>

#include <glibmm/threads.h>

#include "pbd/undo.h"

#include "ardour/ardour.h"
#include "ardour/processor.h"

class XMLNode;

namespace ARDOUR {

class Session;
class IO;
class Route;

/** A mixer strip element (Processor) with 1 or 2 IO elements.
 */
class LIBARDOUR_API IOProcessor : public Processor
{
  public:
	IOProcessor (Session&, bool with_input, bool with_output,
		     const std::string& proc_name, const std::string io_name="",
  		     ARDOUR::DataType default_type = DataType::AUDIO, bool sendish=false);
        IOProcessor (Session&, boost::shared_ptr<IO> input, boost::shared_ptr<IO> output,
		     const std::string& proc_name, ARDOUR::DataType default_type = DataType::AUDIO);
	virtual ~IOProcessor ();

	bool set_name (const std::string& str);

	bool does_routing() const { return true; }

	virtual ChanCount natural_output_streams() const;
	virtual ChanCount natural_input_streams () const;

	boost::shared_ptr<IO>       input()       { return _input; }
	boost::shared_ptr<const IO> input() const { return _input; }
	boost::shared_ptr<IO>       output()       { return _output; }
	boost::shared_ptr<const IO> output() const { return _output; }
	void set_input (boost::shared_ptr<IO>);
	void set_output (boost::shared_ptr<IO>);

	void silence (samplecnt_t nframes, samplepos_t start_sample);
	void disconnect ();

	virtual bool feeds (boost::shared_ptr<Route> other) const;

	PBD::Signal2<void,IOProcessor*,bool>     AutomationPlaybackChanged;
	PBD::Signal2<void,IOProcessor*,uint32_t> AutomationChanged;

	XMLNode& state ();
	int set_state (const XMLNode&, int version);

	static void prepare_for_reset (XMLNode& state, const std::string& name);

  protected:
	boost::shared_ptr<IO> _input;
	boost::shared_ptr<IO> _output;

  private:
	/* disallow copy construction */
	IOProcessor (const IOProcessor&);

	virtual int set_state_2X (const XMLNode &, int);

	bool _own_input;
	bool _own_output;

};

} // namespace ARDOUR

#endif /* __ardour_redirect_h__ */