Cabinet.h

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/*
        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 Plugin
{
        public:
                sample_t gain;
                static Model16 models [];
 
                int model;
                void switch_model (int m);
 
                int n, h;
                cabinet_float * a, * b;
                cabinet_float x[16], y[16];
                
                template <sample_func_t F>
                        void one_cycle (int frames);
 
        public:
                static PortInfo port_info [];
 
                void init();
 
                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 Plugin
{
        public:
                sample_t 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];
                
                template <sample_func_t F>
                        void one_cycle (int frames);
 
        public:
                static PortInfo port_info [];
 
                sample_t adding_gain;
 
                void init();
                void activate();
 
                void run (int n)
                        {
                                one_cycle<store_func> (n);
                        }
                
                void run_adding (int n)
                        {
                                one_cycle<adding_func> (n);
                        }
};
 
#endif /* _CABINET_H_ */