/home/marsyas/marsyas/src/marsyas/Biquad.h

/*
** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
**  
** 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.
*/

#ifndef MARSYAS_Biquad_H
#define MARSYAS_Biquad_H

#include "MarSystem.h"
#include "Filter.h"

namespace Marsyas
{
class Biquad: public MarSystem
{
private:
    mrs_real q_;
    mrs_real freq_;
            
    mrs_real fs_;
    mrs_real alpha_;
    mrs_real w0_;

    realvec b;
    realvec a;

    Filter* filter;

    void addControls();
    void myUpdate(MarControlPtr sender);

public:
    Biquad(std::string name);
    Biquad(const Biquad& orig);
    ~Biquad();
    
    MarSystem* clone() const;

    void myProcess(realvec& in, realvec& out);
};

}//namespace Marsyas

    
#endif

---