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VCO.h

/*
      VCO.h
      
      Copyright 2004-5 Tim Goetze <tim@quitte.de>
      
      http://quitte.de/dsp/

      an oversampled triangle/saw/square oscillator, and a combination of two
      such oscillators with hard sync.

*/
/*
      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 _VCO_H_
#define _VCO_H_

#include "dsp/util.h"
#include "dsp/VCO.h"

#include "dsp/FIR.h"
#include "dsp/sinc.h"
#include "dsp/windows.h"

class VCOs
{
      public:
            double fs;
            d_sample f, gain;

            /* ok to just change these as you please, 4/32 works ok, sortof. */
            enum {
                  OVERSAMPLE = 8,
                  FIR_SIZE = 64, 
            };

            DSP::TriSawSquare vco;

            /* downsampling filter */
            DSP::FIR down;

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

      public:
            static PortInfo port_info[];
            d_sample * ports [6];

            d_sample adding_gain;

            VCOs()
                  : down (FIR_SIZE)
                  { }

            void init (double _fs);

            void activate()
                  {
                        gain = *ports[3];
                        down.reset();
                        vco.reset();
                        /* latency */
                        *ports[5] = OVERSAMPLE;
                  }

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

/* //////////////////////////////////////////////////////////////////////// */

class VCOd
{
      public:
            double fs;
            d_sample f, gain;

            /* ok to just change these as you please, 4/32 works ok, sortof. */
            enum {
                  OVERSAMPLE = 8,
                  FIR_SIZE = 64, 
            };

            DSP::VCO2 vco;

            /* downsampling filter */
            DSP::FIR down;

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

      public:
            static PortInfo port_info[];
            d_sample * ports [11];

            d_sample adding_gain;

            VCOd()
                  : down (FIR_SIZE)
                  { }

            void init (double _fs);

            void activate()
                  {
                        gain = *ports[8];
                        down.reset();
                        vco.reset();
                        /* latency */
                        *ports[10] = OVERSAMPLE;
                  }

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

#endif /* _VCO_H_ */

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