TScrunch.h

//-*-C++-*-
/***************************************************************************
 *
 *   Copyright (C) 2008 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
#ifndef __TScrunch_h
#define __TScrunch_h
 
#include "dsp/Transformation.h"
#include "dsp/TimeSeries.h"
 
namespace dsp {
 
 
  class TScrunch : public Transformation <TimeSeries, TimeSeries>
  {
 
  public:
 
    TScrunch (Behaviour place=anyplace);
 
    void set_factor ( unsigned samples );
    unsigned get_factor () const;
 
    void set_time_resolution ( double microseconds );
    double get_time_resolution () const;
 
    class Engine;
 
    void set_engine (Engine*);
 
  protected:
 
    void prepare ();
 
    void reserve ();
 
    void prepare_output ();
 
    void transformation ();
    void tfp_tscrunch ();
    void fpt_tscrunch ();
 
    mutable unsigned factor;
    mutable double time_resolution;
 
    // If true, use the tres parameter, if false use the factor parameter
    mutable bool use_tres;
 
    unsigned sfactor;
    uint64_t output_ndat;
    bool prepared;
 
    Reference::To<Engine> engine;
  };
 
  class TScrunch::Engine : public OwnStream
  {
  public:
 
    virtual void fpt_tscrunch (const dsp::TimeSeries * in,
                         dsp::TimeSeries * out,
                         unsigned sfactor) = 0;
 
  };
}
 
#endif // !defined(__TScrunch_h)