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Cabinet.h

/*
      Cabinet.h
      
      Copyright 2002-5 Tim Goetze <tim@quitte.de>
      
      http://quitte.de/dsp/

      CabinetI - 16th order IIR filters modeled after various impulse responses 
      from Steve Harris' 'imp' plugin. Limited to 44.1 kHz sample rate.

      CabinetII - 32nd order IIR filters modeled after the same impulse responses
      using a different algorithm. Versions for 44.1 / 48 / 88.2 / 96 kHz sample
      rates, switched at runtime.
*/
/*
      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 _CABINET_H_
#define _CABINET_H_

#include "dsp/util.h"

/* cabinet_float sets the data type used for the IIR history and thus the 
 * computing precision. doubles tend to make the sound more vivid and lively.
 * You can squeeze out a few extra cycles by making this 'float' if needed. 
 * Be warned though that CabinetII has not been tested with 32-bit floats and
 * might become unstable due to the lower computing precision. */
typedef double cabinet_float;

typedef struct {
      int n;
      cabinet_float a[16], b[16];
      float gain;
} Model16;

typedef struct {
      int n;
      cabinet_float a[32], b[32];
      float gain;
} Model32;

class CabinetI
{
      public:
            d_sample gain;
            static Model16 models [];

            int model;
            void switch_model (int m);

            int n, h;
            cabinet_float * a, * b;
            cabinet_float x[16], y[16];
            
            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();

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

/* Second version with 32nd order filters precalculated for
 * 44.1 / 48 / 88.2 / 96 kHz sample rates */

class CabinetII
{
      public:
            d_sample gain;

            static Model32 models44100 [];
            static Model32 models48000 [];
            static Model32 models88200 [];
            static Model32 models96000 [];

            Model32 * models;
            int model;
            void switch_model (int m);

            int n, h;
            cabinet_float * a, * b;
            cabinet_float x[32], y[32];
            
            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();

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

#endif /* _CABINET_H_ */

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