THaG0HelicityReader.h

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#ifndef Podd_THaG0HelicityReader_h_
#define Podd_THaG0HelicityReader_h_
 
//
// THaG0HelicityReader
//
// Routines for decoding G0 helicity hardware
//
 
#include "Rtypes.h"
 
class THaEvData;
class TDatime;
 
class THaG0HelicityReader {
  
public:
  THaG0HelicityReader();
  virtual ~THaG0HelicityReader() = default;
  
  Bool_t GetValidTime() const { return fValidTime; }
 
  // Get ROC helicity information (for debugging)
  Int_t  GetQrt()      const { return fQrt; }
  Int_t  GetGate()     const { return fGate; }
  Int_t  GetReading()  const { return fPresentReading; }
  
protected:
 
  // Used by ReadDatabase
  enum EROC { kHel = 0, kTime, kROC2, kROC3 };
  class ROCinfo {
  public:
    ROCinfo() : roc(kMaxUInt), header(0), index(0) {}
    Bool_t  valid() const;
    UInt_t  roc;              // ROC to read out
    UInt_t  header;           // Headers to search for (0 = ignore)
    UInt_t  index;            // Index into buffer
  };
 
  virtual void  Clear( Option_t* opt="" );
  virtual Int_t ReadData( const THaEvData& evdata );
  Int_t         ReadDatabase( const char* dbfilename, const char* prefix,
                              const TDatime& date, int debug_flag = 0 );
 
  Int_t   fPresentReading;    // Current helicity reading
  Int_t   fQrt;               // Current QRT
  Int_t   fGate;              // Current gate
 
  Double_t fTimestamp;        // Event time from 105 kHz clock
  Double_t fOldT1;            // Last event's timestamps
  Double_t fOldT2;
  Double_t fOldT3;
  Bool_t   fValidTime;        // fTimestamp valid
 
  // ROC information
  // If a header is zero the index is taken to be from the start of
  // the ROC (0 = first word of ROC), otherwise it's from the header
  // (0 = first word after header).
  ROCinfo  fROCinfo[kROC3+1]; // Primary readouts and two redundant clocks
                              // helroc, timeroc, time2roc, time3roc
  Int_t    fG0Debug;          // Debug level
  Bool_t   fHaveROCs;         // Required ROCs are defined
  Bool_t   fNegGate;          // Invert polarity of gate, so that 0=active
 
private:
 
  static UInt_t FindWord( const THaEvData& evdata, const ROCinfo& info );
 
  ClassDef(THaG0HelicityReader,2) // Helper class for reading G0 helicity data
 
};
 
#endif