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SiPixelDbItem.h

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#ifndef CondFormats_SiPixelObjects_SiPixelDbItem_h
#define CondFormats_SiPixelObjects_SiPixelDbItem_h

//----------------------------------------------------------------------------
//-----------------------------------------------------------------------------

#include <boost/cstdint.hpp>

class SiPixelDbItem 
{
  typedef uint32_t PackedPixDbType;

 public:
  SiPixelDbItem() : packedVal_(0) { set(2, 0, 1.0, 0); }  // TO DO: is noise==2 in shifted rep or not???
  ~SiPixelDbItem() {}
  inline short  noise()     { return (packedVal_ >> packing_.noise_shift    ) & packing_.noise_mask   ; }
  inline short  pedestal()  { return (packedVal_ >> packing_.pedestal_shift ) & packing_.pedestal_mask; }
  inline float  gain()      { return (packedVal_ >> packing_.gain_shift     ) & packing_.gain_mask    ; }
  inline char   status()    { return (packedVal_ >> packing_.status_shift   ) & packing_.status_mask  ; }
  inline PackedPixDbType packedValue() { return packedVal_; }

  inline void   setPackedVal( PackedPixDbType p ) { packedVal_ = p; }

  // The following setters are not inline since they are more complicated:
  void   setNoise   (short n);
  void   setPedestal(short p);
  void   setGain    (float g);
  void   setStatus  (char  s);
  void   set( short noise, short pedestal, float gain, char status);


 private:
  PackedPixDbType packedVal_;


  class Packing {
  public:
    //--- Constructor: pre-computes masks and shifts from field widths
    Packing(int noise_w, int pedestal_w, int gain_w, int status_w);

    //--- Public data:
    int status_shift;
    int gain_shift;
    int noise_shift;
    int pedestal_shift;
    PackedPixDbType status_mask;
    PackedPixDbType gain_mask;
    PackedPixDbType noise_mask;
    PackedPixDbType pedestal_mask;
    int noise_width;
    int pedestal_width;
    int status_width;
  };
  static Packing packing_;

};

#endif

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