TPCVDriftTglCalibration.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#ifndef TPC_VDrifITSTPCCalibration_H_
#define TPC_VDrifITSTPCCalibration_H_
 
#include "DetectorsCalibration/TimeSlotCalibration.h"
#include "DetectorsCalibration/TimeSlot.h"
#include "CommonDataFormat/FlatHisto2D.h"
#include "DataFormatsTPC/VDriftCorrFact.h"
#include "CommonDataFormat/Triplet.h"
#include "CCDB/CcdbObjectInfo.h"
 
namespace o2::tpc
{
struct TPCVDTglContainer {
  std::unique_ptr<o2::dataformats::FlatHisto2D_f> histo;
  size_t entries = 0;
  size_t nTFProc = 0;
  double driftVFullMean = 0.;
  static float tOffsetRef;
  static float driftVRef;
 
  TPCVDTglContainer(int ntgl, float tglMax, int ndtgl, float dtglMax)
  {
    histo = std::make_unique<o2::dataformats::FlatHisto2D_f>(ntgl, -tglMax, tglMax, ndtgl, -dtglMax, dtglMax);
  }
 
  TPCVDTglContainer(const TPCVDTglContainer& src)
  {
    histo = std::make_unique<o2::dataformats::FlatHisto2D_f>(*(src.histo.get()));
    entries = src.entries;
  }
 
  void fill(const gsl::span<const o2::dataformats::Triplet<float, float, float>> data)
  {
    if (data.size() < 3) { // first 2 entres always contains the {full and reference VDrift} and {full and reference DriftTimeOffset} used for the TF
      return;
    }
    for (size_t i = 2; i < data.size(); i++) {
      auto& p = data[i];
      auto bin = histo->fill(p.first, p.first - p.second);
      LOGP(debug, "fill #{} : {} for {} {}", i - 1, bin, p.first, p.first - p.second);
      if (bin > -1) {
        entries++;
      }
    }
    //
    float vfull = data[0].first, vref = data[0].second;
    if (driftVRef == 0.f) {
      driftVRef = vref;
    } else if (driftVRef != vref) {
      LOGP(warn, "data with VDriftRef={} were received while initially was set to {}, keep old one", vref, driftVRef);
    }
    driftVFullMean = (driftVFullMean * nTFProc + vfull) / (nTFProc + 1);
    if (tOffsetRef == 0.f) {
      tOffsetRef = data[1].first; // assign 1st full toffset as a reference
    }
    nTFProc++;
  }
 
  void merge(const TPCVDTglContainer* other)
  {
    entries += other->entries;
    histo->add(*(other->histo));
    LOGP(debug, "Old entries:{} New entries:{} oldSum: {} newSum: {}", other->entries, entries, other->histo->getSum(), histo->getSum());
  }
 
  void print() const
  {
    LOG(info) << "Nentries = " << entries;
  }
  ClassDefNV(TPCVDTglContainer, 1);
};
 
class TPCVDriftTglCalibration : public o2::calibration::TimeSlotCalibration<TPCVDTglContainer>
{
  using Slot = o2::calibration::TimeSlot<TPCVDTglContainer>;
 
 public:
  TPCVDriftTglCalibration() = default;
  TPCVDriftTglCalibration(int ntgl, float tglMax, int ndtgl, float dtglMax, uint32_t slotL, float offsetFrac, float maxDelay, size_t minEnt, float offset = 0.f)
    : mNBinsTgl(ntgl), mMaxTgl(tglMax), mNBinsDTgl(ndtgl), mMaxDTgl(dtglMax), mMineEntriesPerSlot(minEnt)
  {
    setSlotLengthInSeconds(slotL);
    setMaxSlotsDelay(maxDelay);
    setStartOffsetFrac(offsetFrac);
  }
 
  ~TPCVDriftTglCalibration() final = default;
 
  bool hasEnoughData(const Slot& slot) const final { return slot.getContainer()->entries >= mMineEntriesPerSlot; }
  void initOutput() final;
  void finalizeSlot(Slot& slot) final;
  Slot& emplaceNewSlot(bool front, TFType tstart, TFType tend) final;
 
  const std::vector<o2::tpc::VDriftCorrFact>& getVDPerSlot() const { return mVDPerSlot; }
  const std::vector<o2::ccdb::CcdbObjectInfo>& getCCDBInfoPerSlot() const { return mCCDBInfoPerSlot; }
  std::vector<o2::tpc::VDriftCorrFact>& getVDPerSlot() { return mVDPerSlot; }
  std::vector<o2::ccdb::CcdbObjectInfo>& getCCDBInfoPerSlot() { return mCCDBInfoPerSlot; }
 
  void setSaveHistosFile(const std::string& f) { mSaveHistosFile = f; }
 
 private:
  size_t mMineEntriesPerSlot = 10000;
  int mNBinsTgl = 10;
  int mNBinsDTgl = 100;
  float mMaxTgl = 1.;
  float mMaxDTgl = 0.2;
  std::string mSaveHistosFile{};
  std::vector<o2::tpc::VDriftCorrFact> mVDPerSlot;
  std::vector<o2::ccdb::CcdbObjectInfo> mCCDBInfoPerSlot;
 
  ClassDefNV(TPCVDriftTglCalibration, 1);
};
 
} // namespace o2::tpc
#endif