Phase2TrackerFEDRawChannelUnpacker.h

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#ifndef EventFilter_Phase2TrackerRawToDigi_Phase2TrackerPhase2TrackerFEDRawChannelUnpacker_H // {
#define EventFilter_Phase2TrackerRawToDigi_Phase2TrackerPhase2TrackerFEDRawChannelUnpacker_H

#include "EventFilter/Phase2TrackerRawToDigi/interface/Phase2TrackerFEDDAQHeader.h"
#include "EventFilter/Phase2TrackerRawToDigi/interface/Phase2TrackerFEDDAQTrailer.h"
#include "EventFilter/Phase2TrackerRawToDigi/interface/Phase2TrackerFEDChannel.h"
#include <stdint.h>

namespace Phase2Tracker {

  // unpacker for RAW CBC data
  // each bit of the channel is related to one strip
  class Phase2TrackerFEDRawChannelUnpacker
  {
  public:
    Phase2TrackerFEDRawChannelUnpacker(const Phase2TrackerFEDChannel& channel);
    uint8_t stripIndex() const { return currentStrip_; }
    bool stripOn() const { return bool((currentWord_>>bitInWord_)&0x1); }
    bool hasData() const { return valuesLeft_; }
    Phase2TrackerFEDRawChannelUnpacker& operator ++ ();
    Phase2TrackerFEDRawChannelUnpacker& operator ++ (int);
  private:
    const uint8_t* data_;
    uint8_t currentOffset_;
    uint8_t currentStrip_;
    uint16_t valuesLeft_;
    uint8_t currentWord_;
    uint8_t bitInWord_;
  }; // end of Phase2TrackerFEDRawChannelUnpacker

  inline Phase2TrackerFEDRawChannelUnpacker::Phase2TrackerFEDRawChannelUnpacker(const Phase2TrackerFEDChannel& channel)
    : data_(channel.data()),
      currentOffset_(channel.offset()),
      currentStrip_(0),
      valuesLeft_((channel.length())*8 - STRIPS_PADDING),
      currentWord_(channel.data()[currentOffset_^7]),
      bitInWord_(0)
  {
  }

  inline Phase2TrackerFEDRawChannelUnpacker& Phase2TrackerFEDRawChannelUnpacker::operator ++ ()
  {
    bitInWord_++;
    currentStrip_++;
    if (bitInWord_ > 7) {
      bitInWord_ = 0;
      currentOffset_++;
      currentWord_ = data_[currentOffset_^7];
    }
    valuesLeft_--;
    return (*this);
  }
  
  inline Phase2TrackerFEDRawChannelUnpacker& Phase2TrackerFEDRawChannelUnpacker::operator ++ (int)
  {
    ++(*this); return *this;
  }

} // end of Phase2Tracker namespace

#endif // } end def EventFilter_Phase2TrackerRawToDigi_Phase2TrackerPhase2TrackerFEDRawChannelUnpacker_H