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HRTF.h

/*
      HRTF.h
      
      Copyright 2002-4 Tim Goetze <tim@quitte.de>
      
      http://quitte.de/dsp/

      IIR filtering based on HRTF data sets

*/
/*
      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., 59 Temple Place - Suite 330, Boston, MA
      02111-1307, USA or point your web browser to http://www.gnu.org.
*/

#ifndef _HRTF_H_
#define _HRTF_H_

#include "dsp/util.h"

class HRTF
{
      public:
            int pan;
            int n, h;

            double x[32];
            
            struct {
                  double * a, * b;
                  double y[32];
            } left, right;
            
            void set_pan (int p);

            d_sample normal;

            template <sample_func_t F>
            void one_cycle (int frames);

      public:
            static PortInfo port_info [];
            d_sample * ports [4];

            d_sample adding_gain;

            void init (double _fs);

            void activate()
                  {
                        set_pan ((int) *ports[1]);
                  }

            void run (int n)
                  {
                        one_cycle<store_func> (n);
                  }
            
            void run_adding (int n)
                  {
                        one_cycle<adding_func> (n);
                  }
};

#endif /* _HRTF_H_ */

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