ExpSmoothingFilter.h

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#ifndef EXP_SMOOTHING_FILTER_H
#define EXP_SMOOTHING_FILTER_H
 
#include "Filter.h"
 
template<typename T>
class ExpSmoothingFilter: public Filter<T> {
  public:
    ExpSmoothingFilter(int a, int b) {
        this->a = a;
        this->b = b;
        previous = 0;
    }
 
    T filter(T value) {
        return previous = (value*a + previous*(b-a))/b;
    }
    
  private:
    T previous;
    int a, b;
};
 
#endif