class HTrb2Unpacker: public HldUnpack

_HADES_CLASS_DESCRIPTION

                     HTrb2Unpacker
            Base class for TRB data unpacking.
  Any detector connected to TRB board should use this class to decode the subevent.
  Decode() method fills the arrays with information about:
  channel number (0-127),
  measured time,
  measured width.

  The goal is to provide data which can be directly used by subsystems
  (tof, start, hodo, wall) in order to directly fill raw categories.

  The most important information is stored in:
  trbLeadingTime[ TrbChanNb ][ hitNb ],
  trbADC[ TrbChanNb ][ hitNb ].
  trbLeadingMult[ TrbChanNb ]

  In case of Leading and Trailing mode the leading time and trailing time
  are delivered in separate data words. In this mode it can happen that
  a trailing time is missing. In such case trailing time is set to -1000000
  and width is set to -1.

  The information in Arrays is ordered in following way:
  1. Leading Time has to exist -> fill trbLeadingTime[ TrbChanNb ][ hitNb ];
  2. If Trailing time is found we try to marge it with last Leading Time.
     If Trailing time does not exist trbLeadingTime[ TrbChanNb ][ hitNb ] = -1000000
     If more than 1 Trailing time exist for one Leading Time the last one is used.
  3. Width is calculated only if Trailing time exist.

  Max. number of hits per channel is currently set to 10.

  Decode:
  The decode function returns dfferent values for different cases:
    100  - end of subevent, stop decoding by purpose
     10  - CTS information -> go to next subsubevt
      0  - error, decoding failed
      1  - data  decode


  Special :

  Try recover wrong blocksize information ( like corrupted data beam apr12, day 116)
  To fixes are implemented and active by default.
  The fixes (tryRecover_1,tryRecover_2, see decode())
  can be enabled/disabled by  :   void tryRecover(Bool_t case1=kTRUE,Bool_t case2=kTRUE);


  In addition this class should perform basic data corrections and error handling.
  (in preparation)