CaloCellPacker_400_500 Class Reference

Calo cell packer/unpacker v400/500. More...

#include <CaloCellPacker_400_500.h>

Collaboration diagram for CaloCellPacker_400_500:

Classes
struct	header400
	Packing parameters header (v400). More...
struct	header500
	Packing parameters header (v500). More...
struct	header501
	Packing parameters header (v501). More...
struct	pars500
	Derived packing parmeters. More...

Public Member Functions
void	pack (const CaloCellContainer &cells, CaloCompactCellContainer &packed, const SG::ThinningDecisionBase *dec, int version) const
	Pack cells.
void	unpack (const CaloCompactCellContainer &packed, const std::vector< CaloCompactCellContainer::value_type > &vheader, CaloCellContainer &cells, DataPool< LArCell > &larpool, DataPool< TileCell > &tilepool) const
	Unpack cells.

Private Member Functions
Packing.
void	pack_time (float time, CaloCompactCellContainer::compact_output_iterator &it, const pars500 &pars) const
	Pack a time value.
void	pack_lar (const CaloCell *cell, CaloCell_ID::SUBCALO subcalo, CaloCompactCellContainer::compact_output_iterator &it, const pars500 &pars) const
	Pack one LAr cell.
void	pack_tile (const TileCell *cell, CaloCompactCellContainer::compact_output_iterator &it, const pars500 &pars) const
	Pack one tile cell.
void	finish_seq (unsigned int hash, unsigned int nseq, CaloCompactCellContainer::compact_output_iterator &it, CaloCell_ID::SUBCALO subcalo, pars500 &pars) const
	Finish up one cell sequence.
void	write_header (const header &header, CaloCompactCellContainer &packed) const
	Write the header to the output container.

Header and parameter definitions.
typedef header501	header
	The most recent header version.
void	init_header (header &header, int version) const
	Initialize header with the current version of the packing parameters.
void	clear_header (header &header) const
	Clear the counters in the event header.
void	init_derived (pars500 &pars) const
	Initialize the derived packing parameters from the constants in the header.

Unpacking.
class	CaloCellPacker_400_500_test
double	unpack_time (CaloCompactCellContainer::compact_input_iterator &it, const pars500 &pars) const
	Unpack the time word.
CaloCell *	unpack_lar (CaloCompactCellContainer::compact_input_iterator &it, CaloCell_ID::SUBCALO subcalo, LArCell *cell, const pars500 &pars, uint16_t provenance) const
	Unpack a LAr cell.
TileCell	unpack_tile (CaloCompactCellContainer::compact_input_iterator &it, const CaloDetDescrElement *dde, const pars500 &pars, uint16_t provenance) const
	Unpack a tile cell.

Detailed Description

Calo cell packer/unpacker v400/500.

This class handles packing and unpacking of calorimeter cells into a CaloCompactCellContainer. This holds data as a vector of integers, but for our purposes, we treat it as an array of 16-bit values. We use the special iterator-like objects that that class defines for access.

A summary of the format is given here. Most constants and bit assignments are specified within the method init_header(). Though some of them are spelled out here, the possibility is left open that they can change. The constants are stored in a header along with the data; for reading, those stored constants are the ones used to interpret the data.

The difference between versions 400 and 500 is the inclusion of quality and provenance data. Quality is like a chi**2 comparing the observed pulse shape (with 5 samples) to the expected one. It is different cell by cell, event by event (it is like energy and time from this point of view)

The idea to store provenance is to know when reading back the ESD how the energy was estimated. For instance, when doing the OFC iteration method on the cosmics on high energy cell there is one bit which tells if the iteration converges or not and this is useful when analyzing back the event (and this bit can vary from event to event for the same cell).

The packed data start with an instance of either header400 or header500, containing the packing constants as well as cell/sequence counts. Note that the first word is the length of the header, in units of int.

Following the header is a set of sequences, each containing a range of cells with consecutive hash IDs. The cells are stored in hash order, which implies that the subcalorimeters are strictly in the order LAREM, LARHEC, LARFCAL, TILE. A single sequence contains cells from only a single subcalorimeter.

Each sequence starts with a 32-bit value; where the high word is stored first, and the low word second. (Note that this is opposite from the order in which the x86 would naturally store the data.) The lower 18 bits of this give the hash value of the first cell in the sequence (others follow sequentially), and the upper 14 bits give the number of cells in the sequence. (Note: if the number of cells in a sequence is more than can be represented in 14 bits, the sequence is simply split into several.) Following this is the information for the cells themselves.

For LAr cells, there is a 16-bit word, containing, starting from the low bit, 12 bits of energy, one sign bit for energy, two bits for the gain, and one bit for the quality. The quality bit is 1 for good quality and 0 for bad quality. The gain bits are one of: 0 ENLOW for LARLOWGAIN 1 ENMED for LARMEDIUMGAIN, unless cell is in the HEC with e < e1_high 2 ENHIG for LARHIGHGAIN, unless cell is not in the HEC with e< e1_high 3 EHHIG for LARMEDIUMGAIN if cell is in the HEC with e < e1_high or for LARHIGHGAIN if cell is not in the HEC with e < e1_high

The maximum energy is taken to be 50 GeV (e1_high) for EHHIG and 3.2 TeV otherwise. We take the cube root of the absolute value of the energy, convert it into a fraction of fullscale (as a cube root), and store that fraction as a fixed-point number.

If the quality is good, this is followed by two additional 16-bit words. The first gives the time information. This has 15 bits of time information and one sign bit. We take the natural log of the time, and then encode this as a fraction of the range from 0.001ns to 1250ns. This is then followed by the quality word.

For tile cells, information for each of the two PMTs is stored separately. First is a 16-bit word containing 13 bits of energy information, one sign bit, one gain bit, and one quality bit. The quality bit is 1 for good quality and 0 for bad. The gain bit is 0 for low gain and 1 for high gain. The energy is again stored as a scaled cube root, where the upper limit is 50 GeV for high gain and 3.2 TeV for low gain. If the quality is good, this is followed by 16 bits of time information, encoded as before. Following both cells is a 16-bit quality word; the lower 8 bits are for the first PMT, and the upper eight bits are for the second PMT. If the quality flags for both PMTs are bad, then this word is omitted.

Following the cell information is the provenance information. Each provenance entry consists of a cell hash code (19 bits) plus a provenance word (13 bits) packed into two 16-bit words. The high 13 bits of the first word are the provenance; the low three bits of the first word plus the second word give the hash code. Each provenance entry says that cells starting at the given hash code have the given provenance value (until the hash code of the next provenance entry). Cells with a hash code less than that of the first provenance entry have a provenance word of 0.

Version 501 adds a status bitmask to the header, with the flag STATUS_UNORDERED. This is set if the packer finds that the cells are not in subcalo order. (This is the case for cell collections produced by the HLT, which are concatenations of per-ROI cell collections.)

Version 502 adds quality words and provenance for tile.

Version 503 reduces slightly the range for negative energies, to avoid confusion with error flags.

Version 504 introduces a flag for SuperCell

Definition at line 144 of file CaloCellPacker_400_500.h.

Member Typedef Documentation

header

typedef header501 CaloCellPacker_400_500::header

private

The most recent header version.

Definition at line 284 of file CaloCellPacker_400_500.h.

Member Function Documentation

clear_header()

void CaloCellPacker_400_500::clear_header ( header & header ) const

private

Clear the counters in the event header.

Parameters

header

The header to clear.

Definition at line 103 of file CaloCellPacker_400_500.cxx.

{
  header.m_ncells_larem = 0;
  header.m_ncells_larhec = 0;
  header.m_ncells_larfcal = 0;
  header.m_ncells_tile  = 0;
  header.m_seq_larem = 0;
  header.m_seq_larhec = 0;
  header.m_seq_larfcal = 0;
  header.m_seq_tile = 0;
  header.m_lengthProvenance = 0;
  header.m_status = 0;
}

finish_seq()

void CaloCellPacker_400_500::finish_seq ( unsigned int hash, unsigned int nseq, CaloCompactCellContainer::compact_output_iterator & it, CaloCell_ID::SUBCALO subcalo, pars500 & pars ) const

inlineprivate

Finish up one cell sequence.

Parameters

hash	The hash of the first cell in the sequence.
nseq	The number of cells in the sequence.
it	Iterator pointing at the beginning of the sequence.
subcalo	Subcalorimeter code for the sequence.
pars	The packing parameters.

Definition at line 423 of file CaloCellPacker_400_500.cxx.

{
  // Pack the hash code and number of cells into a bitfield.
  CaloCompactCellContainer::value_type data =
    pars.m_hash_field.in(hash) | pars.m_nseq_field.in(nseq);
 
  // Write it into the output container.
  it.set ((data>>16) & 0xffff);
  it.set (data & 0xffff);
 
  // Update counters.
  switch (subcalo) {
  case CaloCell_ID::LAREM:
    pars.m_ncells_larem += nseq;
    ++pars.m_seq_larem;
    break;
  case CaloCell_ID::LARHEC:
    pars.m_ncells_larhec += nseq;
    ++pars.m_seq_larhec;
    break;
  case CaloCell_ID::LARFCAL:
    pars.m_ncells_larfcal += nseq;
    ++pars.m_seq_larfcal;
    break;
  case CaloCell_ID::TILE:
    pars.m_ncells_tile += nseq;
    ++pars.m_seq_tile;
    break;
  default:
    std::abort();
  }
}

init_derived()

void CaloCellPacker_400_500::init_derived ( pars500 & pars ) const

private

Initialize the derived packing parameters from the constants in the header.

Parameters

pars	The packing parameters.

Definition at line 123 of file CaloCellPacker_400_500.cxx.

{
  // Good quality flag.
  pars.m_qgood = 1;
 
  // Set up parameters for packing/unpacking the sequence header.
  pars.m_hash_field = CaloCellPackerUtils::Bitfield (0x0003ffff);
  pars.m_nseq_field = CaloCellPackerUtils::Bitfield (0xfffc0000);
  pars.m_nseq_max = 0x3fff;
 
  // Set up parameters for packing/unpacking the provenance list.
  pars.m_prov_field     = CaloCellPackerUtils::Bitfield (0xfff80000);
  pars.m_prov_max = 0x1fff;
  pars.m_prov_max_tile = 0x1f1f;
 
  // Cube roots of energy ranges.
  pars.m_cbrt_e1_norm_res = cbrt(static_cast<double>(pars.m_e1_norm_res));
  pars.m_cbrt_e1_high_res = cbrt(static_cast<double>(pars.m_e1_high_res));
  pars.m_cbrt_low_tile = cbrt(static_cast<double>(pars.m_low_tile));
  pars.m_cbrt_high_tile = cbrt(static_cast<double>(pars.m_high_tile));
 
  // Logarithms of time ranges.
  pars.m_log_t0 = log(static_cast<double>(pars.m_t0));
  pars.m_log_t1 = log(static_cast<double>(pars.m_t1));
 
  // Fill in remaining bit fields.
  pars.m_qualy_field = CaloCellPackerUtils::Bitfield (pars.m_qualy_mask);
  pars.m_egain_field = CaloCellPackerUtils::Bitfield (pars.m_egain_mask);
  pars.m_crtae_norm_field =
    CaloCellPackerUtils::Floatfield2 (pars.m_crtae_mask,
                                      pars.m_cbrt_e1_norm_res);
  pars.m_crtae_high_field =
    CaloCellPackerUtils::Floatfield2 (pars.m_crtae_mask,
                                      pars.m_cbrt_e1_high_res);
  pars.m_logat_field =
    CaloCellPackerUtils::Floatfield (pars.m_logat_mask,
                                     pars.m_log_t0, pars.m_log_t1);
  pars.m_egain_tile_field =
    CaloCellPackerUtils::Bitfield (pars.m_egain_tile_mask);
  pars.m_crtae_tile_high_field =
    CaloCellPackerUtils::Floatfield2 (pars.m_crtae_tile_mask,
                                      pars.m_cbrt_high_tile);
  pars.m_crtae_tile_low_field =
    CaloCellPackerUtils::Floatfield2 (pars.m_crtae_tile_mask,
                                      pars.m_cbrt_low_tile);
 
  pars.m_tile_qual1_field   = CaloCellPackerUtils::Bitfield (0x00ff);
  pars.m_tile_qual2_field   = CaloCellPackerUtils::Bitfield (0xff00);
 
  // Dummy flags.
  pars.m_lar_dummy =
    pars.m_egain_field.in (pars.m_enhig) |
    pars.m_qualy_field.in (pars.m_qabad) |
    pars.m_crtae_norm_field.in (cbrt (pars.m_e1_norm_res)) |
    pars.m_esign_mask;
 
  pars.m_tile_dummy =
        pars.m_egain_tile_field.in (pars.m_glow) |
        pars.m_qualy_field.in (pars.m_qabad) |
        pars.m_crtae_tile_high_field.in (pars.m_cbrt_high_tile) |
        pars.m_esign_tile_mask;
 
  
  {
    CaloCellPackerUtils::Bitfield& elar = pars.m_crtae_norm_field;
    pars.m_lar_dummy_subst = (pars.m_lar_dummy & ~pars.m_crtae_mask) |
      elar.in (elar.out (pars.m_lar_dummy)-1);
 
    CaloCellPackerUtils::Bitfield& etile = pars.m_crtae_tile_high_field;
    pars.m_tile_dummy_subst = (pars.m_tile_dummy & ~pars.m_crtae_tile_mask) |
      etile.in (etile.out (pars.m_tile_dummy)-1);
  }    
}

init_header()

void CaloCellPacker_400_500::init_header ( header & header, int version ) const

private

Initialize header with the current version of the packing parameters.

(Almost) all the constants are defined here.

Parameters

header	The header to initialize.
version	The version of the header to initialize.

Definition at line 40 of file CaloCellPacker_400_500.cxx.

{
  header.m_version = version;
  switch (version) {
  case CaloCompactCellTool::VERSION_501:
  case CaloCompactCellTool::VERSION_502:
  case CaloCompactCellTool::VERSION_503:
  case CaloCompactCellTool::VERSION_504:
    header.m_length = sizeof(header501)/sizeof(int);
    break;
 
  case CaloCompactCellTool::VERSION_500:
    header.m_length = sizeof(header500)/sizeof(int);
    break;
  case CaloCompactCellTool::VERSION_400:
    header.m_length = sizeof(header400)/sizeof(int);
    break;
  default:
    std::abort();
  }
 
  header.m_qualy_mask = 0x8000;
  header.m_egain_mask = 0x6000;
  header.m_esign_mask = 0x1000;
  // 12 bits for cbrt(|E|) and 2 ranges, one normal
  // resolution range with upper limit 3.2 TeV and precision loss
  // sigma_E'/E < 1.4%/sqrt(E/GeV) and one high-resolution range used
  // whenever E < 50 GeV and the hardware gain is HIGH (HEC: MEDIUM)
  // resulting in a precision loss of sigma_E'/E < 0.15%/sqrt(E/GeV)
  header.m_crtae_mask = 0x0fff;
  header.m_egain_tile_mask = 0x4000;
  header.m_esign_tile_mask = 0x2000;
  // 13 bits cbrt(|E|) and 2 ranges
  // upper limit for low gain is 3.2 TeV,
  // upper limit for high gain is 50 GeV (safety factor of ~3)
  header.m_crtae_tile_mask = 0x1fff;
  header.m_tsign_mask = 0x8000;
  header.m_logat_mask = 0x7fff;
 
  header.m_qabad = 0;
  header.m_enlow = 0; // normal resolution LOW gain
  header.m_enmed = 1; // normal resolution MEDIUM gain
  header.m_enhig = 2; // normal resolution HIGH gain
  header.m_ehhig = 3; // high resolution HIGH (HEC: MEDIUM) gain
  header.m_glow  =  TileID::LOWGAIN;
  header.m_ghigh = TileID::HIGHGAIN;
 
  header.m_e1_norm_res  = 3.2*Gaudi::Units::TeV;
  header.m_e1_high_res  = 50*Gaudi::Units::GeV;
  header.m_high_tile = 50*Gaudi::Units::GeV;
  header.m_low_tile  = 3.2*Gaudi::Units::TeV;
  header.m_t0    = 0.001*Gaudi::Units::ns;
  header.m_t1    = 1250.0*Gaudi::Units::ns;
 
  clear_header(header);
}

pack()

void CaloCellPacker_400_500::pack	(	const CaloCellContainer &	cells,
		CaloCompactCellContainer &	packed,
		const SG::ThinningDecisionBase *	dec,
		int	version ) const

Pack cells.

Parameters

cells	The input cell container.
packed	The output packed cell container.
dec	If non-null, specification of elements to be thinned.
version	The version of the header to initialize.

Definition at line 469 of file CaloCellPacker_400_500.cxx.

{
  // Set up the header and derived parameters.
  pars500 pars;
  init_header (pars, version);
  init_derived (pars);
 
  std::vector<short unsigned int> vProvenance;
 
  // Figure out an upper limit for the container size.
  // Header, plus one word/cell for sequence, two words/cell for data,
  // and another word/cell for provenance.
  // Tile cells have two additional words/cell - energy and time for second PMT.
  // Add one more to account for possible padding before the provenance info.
  // We'll resize this down correctly when we're done.
  unsigned int maxsize =
    pars.m_length + 4 * cells.size() + 2 * cells.nCellsCalo (CaloCell_ID::TILE)+1;
  packed.resize (maxsize);
 
  // Set up for loop over cells.
 
  // This is the output iterator, to which we write.
  CaloCompactCellContainer::compact_output_iterator outit
    (packed.compact_begin_output (pars.m_length));
 
  // Here we save the output iterator at the beginning of each sequence.
  // We'll use that to go back and plug in the count when we're done.
  CaloCompactCellContainer::compact_output_iterator seqit
    (packed.compact_begin_output (pars.m_length));
 
  // The hash of the first cell in the current sequence.
  unsigned int seqhash = static_cast<unsigned int> (-1);
 
  // Number of cells so far in the current sequence.
  // 0 if not in a sequence.
  unsigned int nseq = 0;
 
  // The subcalorimeter code of the previous cell we looked at.
  CaloCell_ID::SUBCALO prevcalo = CaloCell_ID::NOT_VALID;
 
  // If all the cells have provenance 0, there is nothing in the vector.
  short unsigned int prevCellProvenance=0;
 
  // check if it is a SuperCell
  bool is_SC=false; 
  if (cells.size()>0){
    // assuming no mixed SC and Cells. 
    const CaloDetDescrElement* dde = cells[0]->caloDDE();
    const CaloCell_Base_ID* idhelper =
      dde->descriptor()->get_calo_helper();
    is_SC = idhelper->is_supercell(cells[0]->ID());
  }
 
  if (is_SC)
    pars.m_status |= header::STATUS_IS_SUPERCELL;
 
  // Loop over input cells.
  for (size_t icell = 0; const CaloCell* cell : cells)
  {
    // Check for thinning.
    if (dec && dec->thinned (icell++)) {
      continue;
    }
 
    // Pick up values from the cell.
    const CaloDetDescrElement* dde = cell->caloDDE();
    unsigned int hash = dde->calo_hash();
    CaloCell_ID::SUBCALO subcalo = dde->getSubCalo();
 
    // Test to see if we need to start a new sequence.
    if (// Not in a sequence now?
        nseq == 0 ||
        // We're at the maximum sequence length?
        nseq >= pars.m_nseq_max ||
        // A skip in the cell hash codes?
        seqhash + nseq != hash ||
        // Moving to a new subcalorimeter?
        subcalo != prevcalo)
    {
      // Mark if cells aren't ordered.
      if (prevcalo != CaloCell_ID::NOT_VALID &&
          subcalo < prevcalo)
        pars.m_status |= header::STATUS_UNORDERED;
 
      // If we're already in a sequence, need to finish it.
      if (nseq > 0)
        finish_seq (seqhash, nseq, seqit, prevcalo, pars);
 
      // Start a new sequence.
      nseq = 0;
      seqhash = hash;
      prevcalo = subcalo;
      // Leave space to fill in the hash/count later.
      seqit = outit;
      ++outit;
      ++outit;
    }
 
    // Add the current cell on to sequence.
    if (!is_SC && subcalo == CaloCell_ID::TILE) {
      pack_tile (static_cast<const TileCell*>(cell), outit, pars);
 
      // Check to see if the provenance changed.
      if (version >= 502 &&
          (cell->provenance() & pars.m_prov_max_tile) != prevCellProvenance)
      {
        prevCellProvenance = cell->provenance() & pars.m_prov_max_tile;
        CaloCompactCellContainer::value_type data =
          pars.m_hash_field.in(hash) |
          pars.m_prov_field.in(prevCellProvenance);
        vProvenance.push_back ((data>>16) & 0xffff);
        vProvenance.push_back (data & 0xffff);
      }
    }
    else {
      pack_lar (cell, subcalo, outit, pars);
 
      // Check to see if the provenance changed.
      if (version >= 500 &&
          (cell->provenance() & pars.m_prov_max) != prevCellProvenance)
      {
        prevCellProvenance = cell->provenance() & pars.m_prov_max;
        CaloCompactCellContainer::value_type data =
          pars.m_hash_field.in(hash) |
          pars.m_prov_field.in(prevCellProvenance);
        vProvenance.push_back ((data>>16) & 0xffff);
        vProvenance.push_back (data & 0xffff);
      }
    }
    ++nseq;
  }
 
  // Finish the last sequence.
  if (nseq != 0)
    finish_seq (seqhash, nseq, seqit, prevcalo, pars);
 
  pars.m_lengthProvenance = vProvenance.size();
 
  assert (outit.used() + pars.m_length + vProvenance.size()/2 + 1 <= maxsize);
 
  if (pars.m_lengthProvenance > 0) {
    // this part is making existing vector to have full number of 32 bit words.
    int x=outit.used();
    // dummy value of 0 is inserted
    outit.set(0);
    int y=outit.used();
    // if size changed it means that vector was flat at the end and that we spoiled it.
    // so we have to fix it.
    if (x!=y) outit.set(0);
    // now its surely flat.
 
    // add provenance stuff at the end.
    for (unsigned short & iter : vProvenance)
    {
      outit.set (iter);
    }
  }
 
  // Now resize the container to the final size.
  packed.resize (outit.used() + pars.m_length);
 
  // And copy the header to the front.
  write_header (pars, packed);
}

pack_lar()

void CaloCellPacker_400_500::pack_lar ( const CaloCell * cell, CaloCell_ID::SUBCALO subcalo, CaloCompactCellContainer::compact_output_iterator & it, const pars500 & pars ) const

inlineprivate

Pack one LAr cell.

Parameters

cell	The cell to pack.
subcalo	The cell's subcalorimeter code.
it	The iterator into which to pack.
pars	The packing parameters.

Definition at line 244 of file CaloCellPacker_400_500.cxx.

{
  // Get values from the cell.
  double energy  = cell->energy();
  double time    = cell->time();
  int qualflag;
  if( (cell->provenance() & 0x2000) == 0x2000 )
    qualflag=pars.m_qgood;
  else
    qualflag=pars.m_qabad;
 
  int gain       = cell->gain();
 
  // Figure out which gain to use.
  // cbrt_flag is set to 1 for the high gain range (50 GeV) and 0 for
  // the low gain range (3.2 TeV).
  int gainflag = -999;
  int cbrt_flag = 0;
  switch ( gain ) {
  case CaloGain::LARLOWGAIN:
    gainflag = pars.m_enlow;
    break;
  case CaloGain::LARMEDIUMGAIN:
    if ( subcalo == CaloCell_ID::LARHEC &&
         fabs(energy) < pars.m_e1_high_res )
    {
      gainflag = pars.m_ehhig;
      cbrt_flag = 1;
    }
    else
      gainflag = pars.m_enmed;
    break;
  case CaloGain::LARHIGHGAIN:
    if ( fabs(energy) < pars.m_e1_high_res &&
         subcalo != CaloCell_ID::LARHEC )
    {
      gainflag = pars.m_ehhig;
      cbrt_flag = 1;
    }
    else
      gainflag = pars.m_enhig;
    break;
 
  default:
    // Some invalid gain.  Mark as an error.
    gainflag = -999;
  }
 
  if (gainflag == -999) {
    it.set (pars.m_lar_dummy);
   }
  else {
    // Pack the energy, gain, and quality into the output word.
    double crtae = cbrt(fabs(energy));
    CaloCompactCell::value_type data =
      (cbrt_flag ? pars.m_crtae_high_field.in (crtae)
       : pars.m_crtae_norm_field.in (crtae));
 
    // Set the sign bit.
    // Only set the sign bit if saved value is non-zero.
    // Otherwise, it'll be read as zero regardless, and if we write
    // again, the sign bit'll be different.
    if (energy < 0 && data != 0)
      data |= pars.m_esign_mask;
 
    data |= pars.m_egain_field.in (gainflag) |
            pars.m_qualy_field.in (qualflag);
 
    if (data == pars.m_lar_dummy)
      data = pars.m_lar_dummy_subst;
 
    // Fill the output container.
    it.set (data);
 
    // If quality is not bad there are time and quality (chi^2) measurements.
    if ( qualflag != pars.m_qabad){
      pack_time (time, it, pars);
      if (pars.m_version >= 500)
        it.set(cell->quality());
    }
  }
}

pack_tile()

void CaloCellPacker_400_500::pack_tile ( const TileCell * cell, CaloCompactCellContainer::compact_output_iterator & it, const pars500 & pars ) const

inlineprivate

Pack one tile cell.

Parameters

cell	The cell to pack.
it	The iterator into which to pack.
pars	The packing parameters.

Definition at line 339 of file CaloCellPacker_400_500.cxx.

{
  // Tile cells have two separate measurements to pack.
  // Retrieve them both:
  double ene[2] = {cell->ene1(), cell->ene2()};
  double time[2] = {cell->time1(), cell->time2()};
  int qbit[2] = {cell->qbit1(), cell->qbit2()};
  int gain[2] = {cell->gain1(), cell->gain2()};
 
  // Loop over the two measurements (PMTs).
  // If no cell both gains are bad;
  // if only one pmt per cell, second gain is bad.
  bool write_qual = false;
  for (int ipmt=0; ipmt<2; ++ipmt) {
    // We'll set this to true if we want to write time information.
    bool write_time = false;
 
    // The data word we're building.
    CaloCompactCell::value_type data;
 
    // Does this measurement exist?
    if (gain[ipmt] == CaloGain::INVALIDGAIN) {
      // No --- make a dummy.
      data = pars.m_tile_dummy;
    }
    else {
      // Yes --- we have a measurement.  See if the quality's good.
      // If so, then we'll want to write the time too.
      int qualflag = pars.m_qabad;
      if (qbit[ipmt] >= TileCell::KEEP_TIME) {
        qualflag = pars.m_qgood;
        write_time = true;
        write_qual = true;
      }
 
      // Pack the energy, with the proper range, depending on the gain.
      double crtae = cbrt(fabs(ene[ipmt]));
      if (gain[ipmt] != pars.m_glow)
        data = pars.m_crtae_tile_high_field.in (crtae);
      else
        data = pars.m_crtae_tile_low_field.in (crtae);
 
      // Add the sign bit.
      // Only set the sign bit if saved value is non-zero.
      // Otherwise, it'll be read as zero regardless, and if we write
      // again, the sign bit'll be different.
      if (ene[ipmt] < 0 && data != 0)
        data |= pars.m_esign_tile_mask;
 
      // Add in the gain and quality.
      data |=
        pars.m_egain_tile_field.in (gain[ipmt]) |
        pars.m_qualy_field.in (qualflag);
 
      if (data == pars.m_tile_dummy)
        data = pars.m_tile_dummy_subst;
    }
 
    // Fill to the output container.
    it.set (data);
 
    // Fill the time and quality, if needed.
    if (write_time)
      pack_time (time[ipmt], it, pars);
  }
 
  if (pars.m_version >= 502 && write_qual) {
    it.set (cell->quality());
  }
}

pack_time()

void CaloCellPacker_400_500::pack_time ( float time, CaloCompactCellContainer::compact_output_iterator & it, const pars500 & pars ) const

inlineprivate

Pack a time value.

Parameters

time	The time to pack.
it	The iterator into which to pack.
pars	The packing parameters.

Definition at line 211 of file CaloCellPacker_400_500.cxx.

{
  // We want to pack log(abs(time)).
  float ltime = pars.m_log_t0;
  if (time != 0)
    ltime = log(fabs(time));
 
  // Pack it into the bitfield.
  CaloCompactCell::value_type data = pars.m_logat_field.in (ltime);
 
  // Set the sign bit.
  // Only set the sign bit if saved value is non-zero.
  // Otherwise, it'll be read as zero regardless, and if we write
  // again, the sign bit'll be different.
  if ( time < 0 && data != 0 )
    data |= pars.m_tsign_mask;
 
  // Fill output.
  it.set (data);
}

unpack()

void CaloCellPacker_400_500::unpack	(	const CaloCompactCellContainer &	packed,
		const std::vector< CaloCompactCellContainer::value_type > &	vheader,
		CaloCellContainer &	cells,
		DataPool< LArCell > &	larpool,
		DataPool< TileCell > &	tilepool ) const

Unpack cells.

Parameters

packed	The input packed cell container.
vheader	The header part of the packed data.
cells	The output cell container.
larpool	Pool for allocating LAr cells.
tilepool	Pool for allocating Tile cells.

Note that allocations will be done from the provided pools, and the pools retain ownership of the cells. The cells container will be changed to a view container.

Definition at line 877 of file CaloCellPacker_400_500.cxx.

{
  // Convert the header.
  pars500 pars;
  pars.m_status = 0;
  pars.m_seq_tile = 0;
  pars.m_seq_larem = 0;
  pars.m_seq_larhec = 0;
  pars.m_seq_larfcal = 0;
  pars.m_lengthProvenance = 0;
  pars.m_ncells_tile = 0;
  pars.m_ncells_larhec = 0;
  pars.m_ncells_larfcal = 0;
  pars.m_ncells_larem = 0;
 
  {
    const int* headerbeg = &*vheader.begin();
    const int* headerend = headerbeg + vheader.size();
    size_t nheader = headerend - headerbeg;
    size_t parsize = sizeof(header) / sizeof(int);
    size_t ncopy = std::min (nheader, parsize);
    int* parsbeg = reinterpret_cast<int*>(&pars);
    std::copy (headerbeg, headerbeg+ncopy, parsbeg);
    if (nheader > parsize) {
      // Header was longer than we expected --- there's something
      // wrong with the data.  Issue a warning.
      REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                  "CaloCellPacker_400_500 ")
        << "Corrupted data: Compact cell header is "
        << nheader << " words long, longer than the largest expected value of "
        << parsize << ".";
    }
    else if (ncopy < parsize) {
      // Header was shorter than we expected.
      // It may be a previous version --- clear out the remainder of pars.
      // TODO: Cross-check the size we got with what we expect based
      // on the version number in the header.
      std::fill (parsbeg + ncopy, parsbeg + parsize, 0);
    }
  }
 
  // Initialize derived parameters from the header.
  init_derived (pars);
 
  // Bounds check on size of provenance.
  unsigned nprov = pars.m_lengthProvenance/2;
  if (nprov + vheader.size() > packed.getData().size()) {
    REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                "CaloCellPacker_400_500 ")
      << "Corrupted data: Provenance count too large "
      << pars.m_lengthProvenance << ".";
    pars.m_lengthProvenance = 0;
    nprov = 0;
  }
 
  // need to make a new iterator and use it for provenance.
  CaloCompactCellContainer::compact_input_iterator provIt =
    packed.compact_begin_input_from(pars.m_lengthProvenance/2);
  unsigned iprov=0;
 
  // getting starting values
  short unsigned int currProvValue=0;
  int nextProvHash=-1;
  short unsigned int nextProvValue=0;
  if (pars.m_lengthProvenance) {
    unsigned int provhash = provIt.next();
    provhash = (provhash<<16) | provIt.next();
    nextProvValue = pars.m_prov_field.out (provhash);
    nextProvHash  = pars.m_hash_field.out (provhash);
    iprov++;
  }
 
  bool is_SC = (pars.m_status & header::STATUS_IS_SUPERCELL);
 
  // We need the detector description.
  const CaloDetDescrManager_Base *ddmgr = nullptr;
  if (is_SC){
    SG::ReadCondHandleKey<CaloSuperCellDetDescrManager> caloSuperCellMgrKey {"CaloSuperCellDetDescrManager"};
    StatusCode sc = caloSuperCellMgrKey.initialize();
    if(sc.isFailure()) {
      throw std::runtime_error("Failed to initialize ReadCondHandleKey for CaloSuperCellDetDescrManager");
    }
    SG::ReadCondHandle<CaloSuperCellDetDescrManager> caloSuperCellMgrHandle{caloSuperCellMgrKey};
    ddmgr = *caloSuperCellMgrHandle;
  }
  else {
    SG::ReadCondHandleKey<CaloDetDescrManager> caloMgrKey {"CaloDetDescrManager"};
    StatusCode sc = caloMgrKey.initialize();
    if(sc.isFailure()) {
      throw std::runtime_error("Failed to initialize ReadCondHandleKey for CaloDetDescrManager");
    }
    SG::ReadCondHandle<CaloDetDescrManager> caloMgrHandle{caloMgrKey};
    ddmgr = *caloMgrHandle;
  }
  const CaloCell_Base_ID *calo_id = ddmgr->getCaloCell_ID();
 
  // Clear the output container and reserve the right number of elements.
  cells.clear(SG::VIEW_ELEMENTS);
  CaloCell_ID::size_type totcells =
    pars.m_ncells_larem   + pars.m_ncells_larhec + 
    pars.m_ncells_larfcal + pars.m_ncells_tile;
  if (totcells > calo_id->calo_cell_hash_max()) {
    REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                "CaloCellPacker_400_500 ")
      << "Corrupted data: Too many cells " << totcells << ".";
    totcells = calo_id->calo_cell_hash_max();
  }
  cells.reserve (totcells);
 
  // Iterator for scanning the input.
  CaloCompactCellContainer::compact_input_iterator it =
    packed.compact_begin_input();
 
  // To test for falling off the end.
  std::vector<CaloCompactCellContainer::value_type>::const_iterator pend =
    packed.getData().end() - (pars.m_lengthProvenance+1)/2;
 
  // Sum up the total number of cells/sequences over all subcalos.
  unsigned int ncells =
    pars.m_ncells_larem +
    pars.m_ncells_larhec +
    pars.m_ncells_larfcal +
    pars.m_ncells_tile;
  unsigned int nseqs = 
    pars.m_seq_larem +
    pars.m_seq_larhec +
    pars.m_seq_larfcal +
    pars.m_seq_tile;
 
  // Note: In the first version of the v400 packer, the sequence counts
  // would be left uninitialized if ncells==0.
  if (ncells == 0)
    nseqs = 0;
 
  // Warn if there are too many cells/sequences.
  IdentifierHash hashmax = calo_id->calo_cell_hash_max();
  if (ncells > hashmax || nseqs > hashmax || nseqs > ncells) {
    REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                "CaloCellPacker_400_500 ")
      << "Corrupted data: Bad counts"
      << ": ncells " << ncells << " nseqs " << nseqs << " hashmax " << hashmax;
  }
 
  CaloCell_ID::SUBCALO prevcalo = CaloCell_ID::NOT_VALID;
 
  // Loop over sequences.
  for (; nseqs > 0; --nseqs) {
    
    // Check for overrun.
    if (it.base() >= pend) {
      REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                  "CaloCellPacker_400_500 ")
        << "Corrupted data: cell vector overrun.";
      break;
    }
 
    // Get the starting hash code and count.
    CaloCompactCell::value_type data = it.next();
    unsigned int hashlength = data << 16;
    hashlength |= it.next();
 
    unsigned int hash = pars.m_hash_field.out (hashlength);
    unsigned int nseq = pars.m_nseq_field.out (hashlength);
 
    if (nseq > ncells || hash+nseq > hashmax)
    {
      REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                  "CaloCellPacker_400_500 ")
        << "Corrupted data: bad sequence.  "
        << "nseq " << nseq << " hash " << hash << " ncells " << ncells
        << " hashmax " << hashmax;
      break;
    }
 
    // Subcalo code for this cell.
    CaloCell_ID::SUBCALO subcalo = 
      static_cast<CaloCell_ID::SUBCALO> (calo_id->sub_calo (hash));
 
    // Maintain the cell container's pointers --- only if cells were ordered!
    if (subcalo != prevcalo) {
      if ((pars.m_status & header::STATUS_UNORDERED) == 0) {
        if (prevcalo != CaloCell_ID::NOT_VALID) {
          cells.updateCaloEndIterators (prevcalo, cells.size());
          if (subcalo < prevcalo) {
            REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                        "CaloCellPacker_400_500 ")
              << "Cells not in subcalo order; iterators will be wrong.";
          }
        }
        cells.updateCaloBeginIterators (subcalo, cells.size());
      }
      cells.setHasCalo (subcalo);
      prevcalo = subcalo;
    }
 
    // Loop over cells in the sequence.
    while (nseq--) {
      // Find the descriptor element for this cell.
      const CaloDetDescrElement *dde = ddmgr->get_element(hash);
 
      if (dde == nullptr) {
        REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                    "CaloCellPacker_400_500 ")
          << "Corrupted data: can't find DDE for cell with hash " << hash;
      }
 
      // Unpack the cell.
      //
      // One point here that needs explaining.
      // The pack_tile method returns a TileCell by value.
      // Normally, this would involve a copy; however, we're careful
      // to allow the compiler to use the `return value optimization'
      // to avoid this copy.  That way, we can use the TileCell constructor
      // directly, without having to add extra set methods (or violate
      // encapsulation, as the previous version of this code did).
      // We get a pointer to a TileCell from the data pool and
      // use this in a placement new to initialize a TileCell
      // using the value returned from unpack_tile.  Due to the RVO,
      // the copy is avoided, and the constructor in unpack_tile
      // will run its constructor directly on the pointer gotten
      // from the pool.  For this to work correctly, we rely
      // on the fact that TileCell has only a trivial destructor ---
      // thus it's safe to rerun the constructor on an object that
      // has already been constructed.
      //
      // You'll notice, however, that CaloCell is done differently.
      // CaloCell is not a simple class; it has a complicated inheritance
      // structure.  It was found that setting up all the vtable pointers
      // in CaloCell was taking a considerable amount of time
      // (comparable to filling in the cell data).  So, for CaloCell,
      // we instead add a couple new (inlined) set methods to fill
      // in the data directly, without having to redo the vtable pointers.
      // We split it in two, one for dde/id and the other for the cell data,
      // to reduce the amount of data we need to pass to unpack_lar.
      //
      // Why wasn't the same thing done for TileCell, then?
      //   - I don't have TC rights for TileEvent, so changing that
      //     is more of a hassle.
      //   - There are many fewer tile cells than LAr cells.
      //   - The TileCell constructor we use is significantly
      //     more complicated than LArCell.  We'd have to duplicate
      //     this code.  Further, this, together with the previous
      //     point, implies that the performance implications
      //     of rebuilding the vtable pointers is much less
      //     for tile cells than for LAr cells.
 
      // New provenance?
      if (hash==static_cast<unsigned int>(nextProvHash)){
        currProvValue = nextProvValue;
        if (iprov<nprov) {
          unsigned int provhash = provIt.next();
          provhash = (provhash<<16) | provIt.next();
          nextProvValue = pars.m_prov_field.out (provhash);
          nextProvHash  = pars.m_hash_field.out (provhash);
          iprov++;
        } else {
          nextProvHash = -1;
        }
      }
 
      CaloCell* cell;
      if (!is_SC && subcalo == CaloCell_ID::TILE)
        cell = new (tilepool.nextElementPtr())
          TileCell (unpack_tile (it,
                                 dde,
                                 pars, currProvValue));
      else {
        cell = unpack_lar (it,
                           subcalo,
                           larpool.nextElementPtr(),
                           pars,
                           currProvValue);
        cell->set (dde, calo_id->cell_id(hash));
      }
 
      // Add the cell to the container.
      if (dde)
        cells.push_back (cell);
 
      // Move to next cell.
      ++hash;
    }
  }
 
  // Finish off the last iterator.
  if (prevcalo != CaloCell_ID::NOT_VALID)
    cells.updateCaloEndIterators (prevcalo, cells.size());
 
  // Check that we've consumed all the data.
  // Note that there may be a padding word before the provenance word.
  if (it.base() < pend-2) {
    REPORT_MESSAGE_WITH_CONTEXT(MSG::WARNING, 
                                "CaloCellPacker_400_500 ")
      << "Corrupted data: didn't consume all packed data.";
  }
}

unpack_lar()

CaloCell * CaloCellPacker_400_500::unpack_lar ( CaloCompactCellContainer::compact_input_iterator & it, CaloCell_ID::SUBCALO subcalo, LArCell * cell, const pars500 & pars, uint16_t provenance ) const

inlineprivate

Unpack a LAr cell.

Parameters

it	Input iterator.
subcalo	Subcalorimeter code for the cell.
cell	Pointer to the cell in which to write.
pars	Unpacking parameters.
provenance	The provenance word for this cell.

Returns

cell, as a CaloCell*.

The DDE and ID will be set in the cell separately; here, we need only fill in the cell data.

Definition at line 705 of file CaloCellPacker_400_500.cxx.

{
  // Get the data word from the input.
  CaloCompactCell::value_type data = it.next();
 
  // Recognize cells filled with dummy values.
  if (data == pars.m_lar_dummy)
  {
    cell->set (0, 0, 0, provenance, CaloGain::INVALIDGAIN);
    return cell;
  }
 
  // Unpack the gain flag.
  int gainflag = pars.m_egain_field.out (data);
  int qualflag = pars.m_qualy_field.out (data);
 
  CaloGain::CaloGain gain = CaloGain::UNKNOWNGAIN;
 
  // Convert to the CaloCell gain, and convert the energy back to a float
  // using the proper range.
  double energy;
  if ( gainflag == pars.m_ehhig ) {
    if ( subcalo == CaloCell_ID::LARHEC )
      gain = CaloGain::LARMEDIUMGAIN;
    else
      gain = CaloGain::LARHIGHGAIN;
    energy = pars.m_crtae_high_field.out (data);
  }
  else {
    if ( gainflag == pars.m_enhig ) {
      gain = CaloGain::LARHIGHGAIN;
    }
    else if ( gainflag == pars.m_enmed ) {
      gain = CaloGain::LARMEDIUMGAIN;
    }
    else if ( gainflag == pars.m_enlow) {
      gain = CaloGain::LARLOWGAIN;
    }
    energy = pars.m_crtae_norm_field.out (data);
  }
 
  // Now undo the cube root and apply the sign bit.
  energy = energy*energy*energy;
  if (data & pars.m_esign_mask)
    energy = -energy;
 
  // If the quality's good, then we need to unpack the time/chi2 too.
  double time = 0;
  uint16_t quality=0;
  if ( qualflag != pars.m_qabad ) {
    time = unpack_time (it, pars);
    if (pars.m_version >= 500)
      quality=it.next();
    provenance = provenance | 0x2000;
  }
 
  // Fill the data into the cell.
  cell->set (energy, time, quality, provenance, gain);
 
  // Return it.
  return cell;
}

unpack_tile()

TileCell CaloCellPacker_400_500::unpack_tile ( CaloCompactCellContainer::compact_input_iterator & it, const CaloDetDescrElement * dde, const pars500 & pars, uint16_t provenance ) const

inlineprivate

Unpack a tile cell.

Parameters

it	Input iterator.
dde	Descriptor element for the cell.
pars	Unpacking parameters.
provenance	The provenance word for this cell.

Returns

The new cell.

Parameters

it	Input iterator.
dde	Descriptor element for the cell.
pars	Unpacking parameters.

Returns

The new cell.

Definition at line 782 of file CaloCellPacker_400_500.cxx.

{
  // Loop over the two elements for the cell.
  double ene[2];
  double time[2];
  int gain[2];
  int qbit[2];
 
  bool read_qual = false;
 
  for (int ipmt = 0; ipmt < 2; ++ipmt) {
    // Unpack the data word.
    CaloCompactCell::value_type data = it.next();
 
    // Is this measurement a dummy?
    if (data == pars.m_tile_dummy)
    {
      // Yeah --- fill in dummy values and skip the rest.
      ene[ipmt] = 0;
      gain[ipmt] = CaloGain::INVALIDGAIN;
      qbit[ipmt] = 0;
      if (ipmt == 1)
        time[ipmt] = time[0];
      else
        time[ipmt] = 0;
      continue;
    }
 
    // Get the quality and gain.
    int qualflag = pars.m_qualy_field.out (data);
    int gainflag = pars.m_egain_tile_field.out (data);
 
    gain[ipmt] = gainflag;
 
    // Unpack the energy, using the range appropriate to the gain.
    double e;
    if (gainflag != pars.m_glow)
      e = pars.m_crtae_tile_high_field.out (data);
    else
      e = pars.m_crtae_tile_low_field.out (data);
    ene[ipmt] = e*e*e;
    if (data & pars.m_esign_tile_mask)
      ene[ipmt] = -ene[ipmt];
 
    // If the quality is good, we need to unpack the time too.
    if (qualflag != pars.m_qabad) {
      read_qual = true;
      time[ipmt] = unpack_time (it, pars);
      qbit[ipmt] = TileCell::MASK_CMPC | TileCell::MASK_TIME;
    }
    else {
      time[ipmt] = 0;
      qbit[ipmt] = TileCell::MASK_CMPC;
    }
  }
 
  uint8_t qual[2];
  if (pars.m_version >= 502) {
    qbit[0] |= pars.m_tile_qual1_field.out (provenance);
    qbit[1] |= pars.m_tile_qual2_field.out (provenance);
    if (read_qual) {
      uint16_t qualp = it.next();
      qual[0] = pars.m_tile_qual1_field.out (qualp);
      qual[1] = pars.m_tile_qual2_field.out (qualp);
    } else {
      qual[0] = ((qbit[0] & TileCell::MASK_BADCH) != 0) ? 255 : 0;
      qual[1] = ((qbit[1] & TileCell::MASK_BADCH) != 0) ? 255 : 0;
    }
  }
  else {
    qual[0] = qual[1] = 0;
  }
 
  // Make the cell.
  return TileCell (dde, ene[0], ene[1], time[0], time[1],
                   qual[0], qual[1], qbit[0], qbit[1], gain[0], gain[1]);
}

unpack_time()

double CaloCellPacker_400_500::unpack_time ( CaloCompactCellContainer::compact_input_iterator & it, const pars500 & pars ) const

inlineprivate

Unpack the time word.

Parameters

it	Input iterator.
pars	Unpacking parameters.

Returns

The unpacked time.

Definition at line 668 of file CaloCellPacker_400_500.cxx.

{
  // Get the word from the input container.
  CaloCompactCell::value_type data = it.next();
 
  // Unpack to a float.
  int underflow;
  double time = pars.m_logat_field.out (data, underflow);
  if (ATH_UNLIKELY(underflow))
    return 0;
 
  // Exponentiate, and restore the sign.
  // (nb. introducing `ee' helps the gcc optimizer avoid a redundant
  // test on the underflow flag.)
  double ee = std::exp (time);
  if (data & pars.m_tsign_mask)
    return -ee;
  return ee;
}

write_header()

void CaloCellPacker_400_500::write_header ( const header & header, CaloCompactCellContainer & packed ) const

private

Write the header to the output container.

Parameters

header	The header to write.
packed	The container to which to write.

Definition at line 644 of file CaloCellPacker_400_500.cxx.

{
  const int * phead = &(header.m_length);
  std::vector<CaloCompactCellContainer::value_type> 
    vhead (phead, phead + header.m_length);
  packed.setHeader(vhead);
}

Friends And Related Symbol Documentation

CaloCellPacker_400_500_test

friend class CaloCellPacker_400_500_test

friend

Definition at line 483 of file CaloCellPacker_400_500.h.

---

The documentation for this class was generated from the following files:

• CaloCellPacker_400_500.h
• CaloCellPacker_400_500.cxx