source: trunk/src/Utils/Hanning.hh @ 221

#ifndef HANNING_H
#define HANNING_H

/**
 *  Define a Hanning filter.
 *
 *  A simple class to define a Hanning filter. 
 *  It is characterised by a full width \f$2a-1\f$ (this is the number of coefficients
 *   and a set of coefficients that follow the functional form of 
 *   \f$c(x) = 0.5 + 0.5\cos(\pi x / a)\f$.
 */

class Hanning
{
public:
  Hanning();          ///< basic constructor -- no filter width set
  virtual ~Hanning(); ///< destructor
  Hanning(int size);  ///< specific constructor that sets width and coefficients

  float *smooth(float *array, int npts);  ///< Smooth an array with the Hanning filter.
    
private:
  int hanningSize; ///< The full width of the filter (number of coefficients)
  float *coeffs;   ///< The coefficients of the filter
  bool allocated;  ///< Have the coefficients been allocated in memory?

};

#endif  // HANNING_H