ITS3DigitizerSpec.cxx

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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.
 
#include "ITSMFTDigitizerSpec.h"
#include "Framework/ControlService.h"
#include "Framework/ConfigParamRegistry.h"
#include "Framework/CCDBParamSpec.h"
#include "Framework/DataProcessorSpec.h"
#include "Framework/DataRefUtils.h"
#include "Framework/Lifetime.h"
#include "Framework/Task.h"
#include "Steer/HitProcessingManager.h"
#include "DataFormatsITSMFT/Digit.h"
#include "SimulationDataFormat/ConstMCTruthContainer.h"
#include "DetectorsBase/BaseDPLDigitizer.h"
#include "DetectorsCommonDataFormats/DetID.h"
#include "DetectorsCommonDataFormats/SimTraits.h"
#include "DataFormatsParameters/GRPObject.h"
#include "DataFormatsITSMFT/ROFRecord.h"
#include "ITS3Simulation/Digitizer.h"
#include "ITSMFTSimulation/DPLDigitizerParam.h"
#include "ITS3Simulation/ITS3DPLDigitizerParam.h"
#include "ITSMFTBase/DPLAlpideParam.h"
#include "ITSBase/GeometryTGeo.h"
#include "ITS3Base/ITS3Params.h"
#include "ITS3Align/MisalignmentManager.h"
 
#include <TChain.h>
#include <TStopwatch.h>
 
#include <string>
 
using namespace o2::framework;
using SubSpecificationType = o2::framework::DataAllocator::SubSpecificationType;
 
namespace
{
std::vector<OutputSpec> makeOutChannels(o2::header::DataOrigin detOrig, bool mctruth)
{
  std::vector<OutputSpec> outputs;
  outputs.emplace_back(detOrig, "DIGITS", 0, Lifetime::Timeframe);
  outputs.emplace_back(detOrig, "DIGITSROF", 0, Lifetime::Timeframe);
  if (mctruth) {
    outputs.emplace_back(detOrig, "DIGITSMC2ROF", 0, Lifetime::Timeframe);
    outputs.emplace_back(detOrig, "DIGITSMCTR", 0, Lifetime::Timeframe);
  }
  outputs.emplace_back(detOrig, "ROMode", 0, Lifetime::Timeframe);
  return outputs;
}
} // namespace
 
namespace o2::its3
{
using namespace o2::base;
class ITS3DPLDigitizerTask : BaseDPLDigitizer
{
 public:
  using BaseDPLDigitizer::init;
 
  ITS3DPLDigitizerTask(bool mctruth = true) : BaseDPLDigitizer(InitServices::FIELD | InitServices::GEOM), mWithMCTruth(mctruth) {}
 
  void initDigitizerTask(framework::InitContext& ic) override
  {
    mDisableQED = ic.options().get<bool>("disable-qed");
  }
 
  void run(framework::ProcessingContext& pc)
  {
    if (mFinished) {
      return;
    }
    updateTimeDependentParams(pc);
 
    if (ITS3Params::Instance().applyMisalignmentHits) {
      LOGP(info, "Applying misalignment to ITS3 Hits");
      o2::its3::align::MisalignmentManager::misalignHits();
    }
 
    // read collision context from input
    auto context = pc.inputs().get<o2::steer::DigitizationContext*>("collisioncontext");
    context->initSimChains(mID, mSimChains);
    const bool withQED = context->isQEDProvided() && !mDisableQED;
    auto& timesview = context->getEventRecords(withQED);
    LOG(info) << "GOT " << timesview.size() << " COLLISSION TIMES";
    LOG(info) << "SIMCHAINS " << mSimChains.size();
 
    // if there is nothing to do ... return
    if (timesview.empty()) {
      return;
    }
    TStopwatch timer;
    timer.Start();
    LOG(info) << " CALLING ITS3 DIGITIZATION ";
 
    mDigitizer.setDigits(&mDigits);
    mDigitizer.setROFRecords(&mROFRecords);
    mDigitizer.setMCLabels(&mLabels);
 
    // digits are directly put into DPL owned resource
    auto& digitsAccum = pc.outputs().make<std::vector<itsmft::Digit>>(Output{mOrigin, "DIGITS", 0});
 
    auto accumulate = [this, &digitsAccum]() {
      // accumulate result of single event processing, called after processing every event supplied
      // AND after the final flushing via digitizer::fillOutputContainer
      if (mDigits.empty()) {
        return; // no digits were flushed, nothing to accumulate
      }
      auto ndigAcc = digitsAccum.size();
      std::copy(mDigits.begin(), mDigits.end(), std::back_inserter(digitsAccum));
 
      // fix ROFrecords references on ROF entries
      auto nROFRecsOld = mROFRecordsAccum.size();
 
      for (int i = 0; i < mROFRecords.size(); i++) {
        auto& rof = mROFRecords[i];
        rof.setFirstEntry(ndigAcc + rof.getFirstEntry());
        rof.print();
 
        if (mFixMC2ROF < mMC2ROFRecordsAccum.size()) { // fix ROFRecord entry in MC2ROF records
          for (int m2rid = mFixMC2ROF; m2rid < mMC2ROFRecordsAccum.size(); m2rid++) {
            // need to register the ROFRecors entry for MC event starting from this entry
            auto& mc2rof = mMC2ROFRecordsAccum[m2rid];
            if (rof.getROFrame() == mc2rof.minROF) {
              mFixMC2ROF++;
              mc2rof.rofRecordID = nROFRecsOld + i;
              mc2rof.print();
            }
          }
        }
      }
 
      std::copy(mROFRecords.begin(), mROFRecords.end(), std::back_inserter(mROFRecordsAccum));
      if (mWithMCTruth) {
        mLabelsAccum.mergeAtBack(mLabels);
      }
      LOG(info) << "Added " << mDigits.size() << " digits ";
      // clean containers from already accumulated stuff
      mLabels.clear();
      mDigits.clear();
      mROFRecords.clear();
    }; // and accumulate lambda
 
    auto& eventParts = context->getEventParts(withQED);
    // loop over all composite collisions given from context (aka loop over all the interaction records)
    const int bcShift = mDigitizer.getParams().getROFrameBiasInBC();
    // loop over all composite collisions given from context (aka loop over all the interaction records)
    for (size_t collID = 0; collID < timesview.size(); ++collID) {
      auto irt = timesview[collID];
      if (irt.toLong() < bcShift) { // due to the ROF misalignment the collision would go to negative ROF ID, discard
        continue;
      }
      irt -= bcShift; // account for the ROF start shift
 
      mDigitizer.setEventTime(irt);
      mDigitizer.resetEventROFrames(); // to estimate min/max ROF for this collID
      // for each collision, loop over the constituents event and source IDs
      // (background signal merging is basically taking place here)
      for (auto& part : eventParts[collID]) {
 
        // get the hits for this event and this source
        mHits.clear();
        context->retrieveHits(mSimChains, o2::detectors::SimTraits::DETECTORBRANCHNAMES[mID][0].c_str(), part.sourceID, part.entryID, &mHits);
 
        if (!mHits.empty()) {
          LOG(debug) << "For collision " << collID << " eventID " << part.entryID
                     << " found " << mHits.size() << " hits ";
          mDigitizer.process(&mHits, part.entryID, part.sourceID); // call actual digitization procedure
        }
      }
      mMC2ROFRecordsAccum.emplace_back(collID, -1, mDigitizer.getEventROFrameMin(), mDigitizer.getEventROFrameMax());
      accumulate();
    }
    mDigitizer.fillOutputContainer();
    accumulate();
 
    // here we have all digits and labels and we can send them to consumer (aka snapshot it onto output)
 
    pc.outputs().snapshot(Output{mOrigin, "DIGITSROF", 0}, mROFRecordsAccum);
    if (mWithMCTruth) {
      pc.outputs().snapshot(Output{mOrigin, "DIGITSMC2ROF", 0}, mMC2ROFRecordsAccum);
      auto& sharedlabels = pc.outputs().make<o2::dataformats::ConstMCTruthContainer<o2::MCCompLabel>>(Output{mOrigin, "DIGITSMCTR", 0});
      mLabelsAccum.flatten_to(sharedlabels);
      // free space of existing label containers
      mLabels.clear_andfreememory();
      mLabelsAccum.clear_andfreememory();
    }
    LOG(info) << mID.getName() << ": Sending ROMode= " << mROMode << " to GRPUpdater";
    pc.outputs().snapshot(Output{mOrigin, "ROMode", 0}, mROMode);
 
    timer.Stop();
    LOG(info) << "Digitization took " << timer.CpuTime() << "s";
 
    // we should be only called once; tell DPL that this process is ready to exit
    pc.services().get<ControlService>().readyToQuit(QuitRequest::Me);
 
    mFinished = true;
  }
 
  void updateTimeDependentParams(ProcessingContext& pc)
  {
    static bool initOnce{false};
    if (!initOnce) {
      initOnce = true;
      auto& digipar = mDigitizer.getParams();
 
      // configure digitizer
      o2::its::GeometryTGeo* geom = o2::its::GeometryTGeo::Instance();
      geom->fillMatrixCache(o2::math_utils::bit2Mask(o2::math_utils::TransformType::L2G)); // make sure L2G matrices are loaded
      mDigitizer.setGeometry(geom);
 
      const auto& dopt = o2::itsmft::DPLDigitizerParam<o2::detectors::DetID::ITS>::Instance();
      const auto& doptIB = o2::its3::ITS3DPLDigitizerParam::Instance();
      pc.inputs().get<o2::itsmft::DPLAlpideParam<o2::detectors::DetID::ITS>*>("ITS_alppar");
      const auto& aopt = o2::itsmft::DPLAlpideParam<o2::detectors::DetID::ITS>::Instance();
      digipar.setContinuous(dopt.continuous);
      digipar.setROFrameBiasInBC(aopt.roFrameBiasInBC);
      if (dopt.continuous) {
        auto frameNS = aopt.roFrameLengthInBC * o2::constants::lhc::LHCBunchSpacingNS;
        digipar.setROFrameLengthInBC(aopt.roFrameLengthInBC);
        digipar.setROFrameLength(frameNS);                                                                       // RO frame in ns
        digipar.setStrobeDelay(aopt.strobeDelay);                                                                // Strobe delay wrt beginning of the RO frame, in ns
        digipar.setStrobeLength(aopt.strobeLengthCont > 0 ? aopt.strobeLengthCont : frameNS - aopt.strobeDelay); // Strobe length in ns
      } else {
        digipar.setROFrameLength(aopt.roFrameLengthTrig); // RO frame in ns
        digipar.setStrobeDelay(aopt.strobeDelay);         // Strobe delay wrt beginning of the RO frame, in ns
        digipar.setStrobeLength(aopt.strobeLengthTrig);   // Strobe length in ns
      }
      // parameters of signal time response: flat-top duration, max rise time and q @ which rise time is 0
      digipar.getSignalShape().setParameters(dopt.strobeFlatTop, dopt.strobeMaxRiseTime, dopt.strobeQRiseTime0);
      digipar.setChargeThreshold(dopt.chargeThreshold); // charge threshold in electrons
      digipar.setNoisePerPixel(dopt.noisePerPixel);     // noise level
      digipar.setTimeOffset(dopt.timeOffset);
      digipar.setNSimSteps(dopt.nSimSteps);
 
      // ITS3 inner barrel specific parameters
      digipar.setIBChargeThreshold(doptIB.IBChargeThreshold);
      digipar.setIBNSimSteps(doptIB.nIBSimSteps);
      digipar.setIBNoisePerPixel(doptIB.IBNoisePerPixel);
 
      mROMode = digipar.isContinuous() ? o2::parameters::GRPObject::CONTINUOUS : o2::parameters::GRPObject::PRESENT;
      LOG(info) << mID.getName() << " simulated in "
                << ((mROMode == o2::parameters::GRPObject::CONTINUOUS) ? "CONTINUOUS" : "TRIGGERED")
                << " RO mode";
 
      if (o2::its3::ITS3Params::Instance().useDeadChannelMap) {
        pc.inputs().get<o2::itsmft::NoiseMap*>("IT3_dead"); // trigger final ccdb update
      }
 
      // init digitizer
      mDigitizer.init();
    }
    // Other time-dependent parameters can be added below
  }
 
  void finaliseCCDB(ConcreteDataMatcher& matcher, void* obj)
  {
    if (matcher == ConcreteDataMatcher(detectors::DetID::ITS, "ALPIDEPARAM", 0)) {
      LOG(info) << mID.getName() << " Alpide param updated";
      const auto& par = o2::itsmft::DPLAlpideParam<o2::detectors::DetID::ITS>::Instance();
      par.printKeyValues();
      return;
    }
    if (matcher == ConcreteDataMatcher(mOrigin, "DEADMAP", 0)) {
      LOG(info) << mID.getName() << " static dead map updated";
      mDigitizer.setDeadChannelsMap((o2::itsmft::NoiseMap*)obj);
      return;
    }
  }
 
 private:
  bool mWithMCTruth{true};
  bool mFinished{false};
  bool mDisableQED{false};
  const o2::detectors::DetID mID{o2::detectors::DetID::IT3};
  const o2::header::DataOrigin mOrigin{o2::header::gDataOriginIT3};
  o2::its3::Digitizer mDigitizer{};
  std::vector<o2::itsmft::Digit> mDigits{};
  std::vector<o2::itsmft::ROFRecord> mROFRecords{};
  std::vector<o2::itsmft::ROFRecord> mROFRecordsAccum{};
  std::vector<o2::itsmft::Hit> mHits{};
  std::vector<o2::itsmft::Hit>* mHitsP{&mHits};
  o2::dataformats::MCTruthContainer<o2::MCCompLabel> mLabels{};
  o2::dataformats::MCTruthContainer<o2::MCCompLabel> mLabelsAccum{};
  std::vector<o2::itsmft::MC2ROFRecord> mMC2ROFRecordsAccum{};
  std::vector<TChain*> mSimChains{};
 
  int mFixMC2ROF = 0;                                                             // 1st entry in mc2rofRecordsAccum to be fixed for ROFRecordID
  o2::parameters::GRPObject::ROMode mROMode = o2::parameters::GRPObject::PRESENT; // readout mode
};
 
DataProcessorSpec getITS3DigitizerSpec(int channel, bool mctruth)
{
  std::string detStr = o2::detectors::DetID::getName(o2::detectors::DetID::IT3);
  auto detOrig = o2::header::gDataOriginIT3;
  std::vector<InputSpec> inputs;
  inputs.emplace_back("collisioncontext", "SIM", "COLLISIONCONTEXT", static_cast<SubSpecificationType>(channel), Lifetime::Timeframe);
  inputs.emplace_back("ITS_alppar", "ITS", "ALPIDEPARAM", 0, Lifetime::Condition, ccdbParamSpec("ITS/Config/AlpideParam"));
  if (o2::its3::ITS3Params::Instance().useDeadChannelMap) {
    inputs.emplace_back("IT3_dead", "IT3", "DEADMAP", 0, Lifetime::Condition, ccdbParamSpec("IT3/Calib/DeadMap"));
  }
 
  return DataProcessorSpec{detStr + "Digitizer",
                           inputs, makeOutChannels(detOrig, mctruth),
                           AlgorithmSpec{adaptFromTask<ITS3DPLDigitizerTask>(mctruth)},
                           Options{{"disable-qed", o2::framework::VariantType::Bool, false, {"disable QED handling"}}}};
}
 
} // namespace o2::its3