iir_filter.hh

// 
// YASE IIR Module Header
// 
// Copyright (C) 2022 Eric Klavins
// This file is part of YASE
// 
// YASE 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 3 of the License, or (at your option) any later
// version.
//
// YASE 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 YASE. If not, see <https://www.gnu.org/licenses/>.
// 
 
#ifndef YASE_FILTER_H
#define YASE_FILTER_H
 
#include "module.hh"
 
namespace yase {
 
    
    class IIRFilter : public Module {
 
    public:
 
      IIRFilter(int P, int Q); // size of IIR filter
      IIRFilter(vector<double> A, vector<double> B); // coeefficient list
      void init();
      void update();
      void set_coefficients(vector<double> A, vector<double> B);
 
    protected:
 
      int p, q;
      vector<double> u, y, a, b;
      int signal, offset;
 
    };
 
}
 
#endif