SweepVF.h

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/*
        SweepVF.h
        
        Copyright 2004-7 Tim Goetze <tim@quitte.de>
        
        http://quitte.de/dsp/
 
        SweepVFI, a lorenz fractal modulating the cutoff frequency of a 
        state-variable (ladder) filter.
 
        SweepVFII, the same with Q being modulated by a second fractal.
 
        AutoWah, SVF being modulated by 'instant' amplitude (envelope).
 
*/
/*
        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 _SWEEP_VF_H_
#define _SWEEP_VF_H_
 
#include "dsp/SVF.h"
 
#include "dsp/Lorenz.h"
#include "dsp/Roessler.h"
 
#include "dsp/RMS.h"
#include "dsp/BiQuad.h"
#include "dsp/OnePole.h"
 
class SweepVFI
: public Plugin
{
        public:
                double fs;
 
                /* svf parameters */
                sample_t f, Q;
 
                /* needs to be a power of two */
                enum {
                        BLOCK_SIZE = 32
                };
 
                DSP::StackedSVF<1,2> svf;
                DSP::Lorenz lorenz;
 
                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);
                        }
};
 
class SweepVFII
: public Plugin
{
        public:
                /* svf parameters */
                sample_t f, Q;
 
                /* needs to be a power of two */
                enum {
                        BLOCK_SIZE = 32
                };
 
                DSP::StackedSVF<1,2> svf;
                DSP::Lorenz lorenz1;
                DSP::Lorenz lorenz2;
 
                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);
                        }
};
 
/* //////////////////////////////////////////////////////////////////////// */
 
class AutoWah
: public Plugin
{
        public:
                double fs;
 
                /* svf parameters */
                sample_t f, Q;
 
                /* needs to be a power of two */
                enum {
                        BLOCK_SIZE = 32
                };
 
                DSP::StackedSVF<1,2> svf;
                DSP::RMS rms;
 
                DSP::BiQuad filter;
                DSP::OnePoleHP hp;
 
                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);
                        }
};
 
#endif /* _SWEEP_VF_H_ */