/*******************************************/
/*
   One Pole Filter Class,
   by Perry R. Cook, 1995-96.
   Added methods by Julius Smith, 2000.

   The parameter gain is an additional
   gain parameter applied to the filter
   on top of the normalization that takes
   place automatically.  So the net max
   gain through the system equals the
   value of gain.  sgain is the combina-
   tion of gain and the normalization
   parameter, so if you set the poleCoeff
   to alpha, sgain is always set to
   gain * (1.0 - fabs(alpha)).
*/
/*******************************************/

#if !defined(__OnePole_h)
#define __OnePole_h

#include "Filter.h"

class OnePole : public Filter
{
protected:  
  MY_FLOAT poleCoeff;
  MY_FLOAT sgain;
public:
  OnePole();
  OnePole(MY_FLOAT thePole);
  ~OnePole();
  void clear();
  void setB0(MY_FLOAT aValue);   /* set numerator b0 in b0/(1+a1/z) */
  void setNum(MY_FLOAT *values);
  void setA1(MY_FLOAT aValue);   /* set denominator a1 in b0/(1+a1/z) */
  void setDen(MY_FLOAT *values);
  void setPole(MY_FLOAT aValue);
  void setGain(MY_FLOAT aValue);
  MY_FLOAT tick(MY_FLOAT sample);
};

#endif