FZoom.h

//-*-C++-*-
/***************************************************************************
 *
 *   Copyright (C) 2015 by Matthew Kerr
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
#ifndef __FZoom_h
#define __FZoom_h
 
#include "dsp/Transformation.h"
#include "dsp/TimeSeries.h"
 
namespace dsp {
 
  class FZoom : public Transformation <TimeSeries, TimeSeries>
  {
 
  public:
 
    FZoom ();
    
    void set_centre_frequency ( double freq );
    void set_bandwidth ( double bw );
 
    double get_centre_frequency ( ) const;
    double get_bandwidth (  ) const;
 
    static void set_channel_bounds(const Observation* input,
        double centre_frequency, double bandwidth,
        unsigned* chan_lo, unsigned* chan_hi);
 
    class Engine;
 
    void set_engine (Engine*);
 
  protected:
 
    void set_bounds ();
 
    void prepare () ;
 
    void transformation ();
 
    double centre_frequency;
    double bandwidth;
 
    unsigned chan_lo,chan_hi;
    void fpt_copy(TimeSeries* dest);
    void tfp_copy(TimeSeries* dest);
 
    Reference::To<Engine> engine;
 
  };
 
  class FZoom::Engine : public OwnStream
  {
  public:
 
    enum  Direction {
 
      DeviceToHost,
 
      DeviceToDevice
 
    };
 
    virtual void fpt_copy (const dsp::TimeSeries * in, 
                         dsp::TimeSeries * out,
                         unsigned chan_lo,
                         unsigned chan_hi) = 0;
 
    void set_direction (Direction);
    Direction get_direction () {return direction;}
 
  protected:
 
    Direction direction;
 
  };
}
 
#endif // !defined(__FZoom_h)