CalWireT962_module.cc

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//
// CalWireT962 class
//
// brebel@fnal.gov
//

// Framework includes
#include "art/Framework/Core/EDProducer.h"
#include "art/Framework/Core/ModuleMacros.h"
#include "art/Framework/Principal/Event.h"
#include "art/Framework/Principal/Handle.h"
#include "art/Framework/Services/Registry/ServiceHandle.h"
#include "canvas/Persistency/Common/Assns.h"
#include "canvas/Persistency/Common/Ptr.h"
#include "cetlib/search_path.h"
#include "cetlib_except/exception.h"
#include "fhiclcpp/ParameterSet.h"
#include "messagefacility/MessageLogger/MessageLogger.h"

// LArSoft includes
#include "larcore/Geometry/Geometry.h"
#include "larcoreobj/SimpleTypesAndConstants/RawTypes.h" // raw::ChannelID_t
#include "lardata/ArtDataHelper/WireCreator.h"
#include "lardata/Utilities/AssociationUtil.h"
#include "lardata/Utilities/LArFFT.h"
#include "lardataobj/RawData/RawDigit.h"
#include "lardataobj/RawData/raw.h" // raw::Uncompress()
#include "lardataobj/RecoBase/Wire.h"
#include "larevt/CalibrationDBI/Interface/ChannelStatusProvider.h"
#include "larevt/CalibrationDBI/Interface/ChannelStatusService.h"

// ROOT includes
#include <TComplex.h>
#include <TF1.h>
#include <TFile.h>
#include <TH2D.h>

namespace caldata {

  class CalWireT962 : public art::EDProducer {

  public:
    // create calibrated signals on wires. this class runs
    // an fft to remove the electronics shaping.
    explicit CalWireT962(fhicl::ParameterSet const& pset);

    void produce(art::Event& evt);
    void beginJob();

  private:
    std::string fResponseFile; 
    // for c2: fDataSize is not used
    // int          fDataSize;          ///< size of raw data on one wire
    int fExpEndBins;               
    int fPostsample;               
    std::string fDigitModuleLabel; 

    std::vector<std::vector<TComplex>> fKernelR; 
    std::vector<std::vector<TComplex>> fKernelS; 
    std::vector<double> fDecayConstsR;           
    std::vector<double> fDecayConstsS;           
    std::vector<int> fKernMapR;                  
    std::vector<int> fKernMapS;                  
  protected:
  }; // class CalWireT962
}

namespace caldata {

  //-------------------------------------------------
  CalWireT962::CalWireT962(fhicl::ParameterSet const& pset) : EDProducer{pset}
  {
    fDigitModuleLabel = pset.get<std::string>("DigitModuleLabel", "daq");
    fExpEndBins = pset.get<int>("ExponentialEndBins");
    fPostsample = pset.get<int>("PostsampleBins");

    cet::search_path sp("FW_SEARCH_PATH");
    sp.find_file(pset.get<std::string>("ResponseFile"), fResponseFile);

    produces<std::vector<recob::Wire>>();
    produces<art::Assns<raw::RawDigit, recob::Wire>>();
  }

  //-------------------------------------------------
  void CalWireT962::beginJob()
  {

    MF_LOG_DEBUG("CalWireT962") << "CalWireT962_module: Opening  Electronics Response File: "
                                << fResponseFile.c_str();

    TFile f(fResponseFile.c_str());
    if (f.IsZombie())
      mf::LogWarning("CalWireT962") << "Cannot open response file " << fResponseFile.c_str();

    TH2D* respRe = dynamic_cast<TH2D*>(f.Get("real/RespRe"));
    TH2D* respIm = dynamic_cast<TH2D*>(f.Get("real/RespIm"));
    TH1D* decayHist = dynamic_cast<TH1D*>(f.Get("real/decayHist"));
    unsigned int wires = decayHist->GetNbinsX();
    unsigned int bins = respRe->GetYaxis()->GetNbins();
    unsigned int bin = 0;
    unsigned int wire = 0;
    fDecayConstsR.resize(wires);
    fKernMapR.resize(wires);
    fKernelR.resize(respRe->GetXaxis()->GetNbins());
    const TArrayD* edges = respRe->GetXaxis()->GetXbins();
    for (int i = 0; i < respRe->GetXaxis()->GetNbins(); ++i) {
      fKernelR[i].resize(bins);
      for (bin = 0; bin < bins; ++bin) {

        const TComplex a(respRe->GetBinContent(i + 1, bin + 1),
                         respIm->GetBinContent(i + 1, bin + 1));
        fKernelR[i][bin] = a;
      }
      for (; wire < (*edges)[i + 1]; ++wire) {
        fKernMapR[wire] = i;
        fDecayConstsR[wire] = decayHist->GetBinContent(wire + 1);
      }
    }
    respRe = dynamic_cast<TH2D*>(f.Get("sim/RespRe"));
    respIm = dynamic_cast<TH2D*>(f.Get("sim/RespIm"));
    decayHist = dynamic_cast<TH1D*>(f.Get("sim/decayHist"));
    wires = decayHist->GetNbinsX();
    bins = respRe->GetYaxis()->GetNbins();
    fDecayConstsS.resize(wires);
    fKernMapS.resize(wires);
    fKernelS.resize(respRe->GetXaxis()->GetNbins());
    const TArrayD* edges1 = respRe->GetXaxis()->GetXbins();
    wire = 0;
    for (int i = 0; i < respRe->GetXaxis()->GetNbins(); ++i) {
      fKernelS[i].resize(bins);
      for (bin = 0; bin < bins; ++bin) {
        const TComplex b(respRe->GetBinContent(i + 1, bin + 1),
                         respIm->GetBinContent(i + 1, bin + 1));
        fKernelS[i][bin] = b;
      }
      for (; wire < (*edges1)[i + 1]; ++wire) {
        fKernMapS[wire] = i;
        fDecayConstsS[wire] = decayHist->GetBinContent(wire + 1);
      }
    }

    f.Close();
  }

  void CalWireT962::produce(art::Event& evt)
  {

    // get the geometry
    art::ServiceHandle<geo::Geometry const> geom;

    std::vector<double> decayConsts;
    std::vector<int> kernMap;
    std::vector<std::vector<TComplex>> kernel;
    //Put correct response functions and decay constants in place
    if (evt.isRealData()) {
      decayConsts = fDecayConstsR;
      kernMap = fKernMapR;
      kernel = fKernelR;
    }
    else {
      decayConsts = fDecayConstsS;
      kernMap = fKernMapS;
      kernel = fKernelS;
    }

    // get the FFT service to have access to the FFT size
    art::ServiceHandle<util::LArFFT> fFFT;

    // make a collection of Wires
    std::unique_ptr<std::vector<recob::Wire>> wirecol(new std::vector<recob::Wire>);
    // ... and an association set
    std::unique_ptr<art::Assns<raw::RawDigit, recob::Wire>> WireDigitAssn(
      new art::Assns<raw::RawDigit, recob::Wire>);

    // Read in the digit List object(s).
    art::Handle<std::vector<raw::RawDigit>> digitVecHandle;
    evt.getByLabel(fDigitModuleLabel, digitVecHandle);

    if (!digitVecHandle->size()) return;
    mf::LogInfo("CalWireT962") << "CalWireT962:: digitVecHandle size is " << digitVecHandle->size();

    // Use the handle to get a particular (0th) element of collection.
    art::Ptr<raw::RawDigit> digitVec0(digitVecHandle, 0);

    unsigned int dataSize = digitVec0->Samples(); //size of raw data vectors

    int transformSize = fFFT->FFTSize();
    raw::ChannelID_t channel = raw::InvalidChannelID; // channel number
    unsigned int bin(0);                              // time bin loop variable

    lariov::ChannelStatusProvider const& channelStatus =
      art::ServiceHandle<lariov::ChannelStatusService const>()->GetProvider();

    double decayConst = 0.;   // exponential decay constant of electronics shaping
    double fitAmplitude = 0.; //This is the seed value for the amplitude in the exponential tail fit
    std::vector<float> holder;                           // holds signal data
    std::vector<TComplex> freqHolder(transformSize + 1); // temporary frequency data

    // loop over all wires
    for (unsigned int rdIter = 0; rdIter < digitVecHandle->size(); ++rdIter) { // ++ move
      holder.clear();

      art::Ptr<raw::RawDigit> digitVec(digitVecHandle, rdIter);
      raw::RawDigit::ADCvector_t rawadc(
        digitVec->Samples()); // vector holding uncompressed adc values
      raw::Uncompress(digitVec->ADCs(), rawadc, digitVec->Compression());
      channel = digitVec->Channel();

      // skip bad channels
      if (!channelStatus.IsBad(channel)) {
        holder.resize(transformSize);

        for (bin = 0; bin < dataSize; ++bin)
          holder[bin] = (rawadc[bin] - digitVec->GetPedestal());
        // fExpEndBins only nonzero for detectors needing exponential tail fitting
        if (fExpEndBins && std::abs(decayConsts[channel]) > 0.0) {

          TH1D expTailData(
            "expTailData", "Tail data for fit", fExpEndBins, dataSize - fExpEndBins, dataSize);
          TF1 expFit("expFit", "[0]*exp([1]*x)");

          for (bin = 0; bin < (unsigned int)fExpEndBins; ++bin)
            expTailData.Fill(dataSize - fExpEndBins + bin, holder[dataSize - fExpEndBins + bin]);
          decayConst = decayConsts[channel];
          fitAmplitude =
            holder[dataSize - fExpEndBins] / exp(decayConst * (dataSize - fExpEndBins));
          expFit.FixParameter(1, decayConst);
          expFit.SetParameter(0, fitAmplitude);
          expTailData.Fit(&expFit, "QWN", "", dataSize - fExpEndBins, dataSize);
          expFit.SetRange(dataSize, transformSize);
          for (bin = 0; bin < dataSize; ++bin)
            holder[dataSize + bin] = expFit.Eval(bin + dataSize);
        }
        // This is actually deconvolution, by way of convolution with the inverted
        // kernel.  This code assumes the response function has already been
        // been transformed and inverted.  This way a complex multiplication, rather
        // than a complex division is performed saving 2 multiplications and
        // 2 divsions

        fFFT->Convolute(holder, kernel[kernMap[channel]]);
      } // end if channel is a good channel

      holder.resize(dataSize, 1e-5);
      //This restores the DC component to signal removed by the deconvolution.
      if (fPostsample) {
        double average = 0.0;
        for (bin = 0; bin < (unsigned int)fPostsample; ++bin)
          average += holder[holder.size() - 1 - bin] / (double)fPostsample;
        for (bin = 0; bin < holder.size(); ++bin)
          holder[bin] -= average;
      }

      // Make a single ROI that spans the entire data size
      wirecol->push_back(recob::WireCreator(holder, *digitVec).move());

      // add an association between the last object in wirecol
      // (that we just inserted) and digitVec
      if (!util::CreateAssn(evt, *wirecol, digitVec, *WireDigitAssn)) {
        throw art::Exception(art::errors::ProductRegistrationFailure)
          << "Can't associate wire #" << (wirecol->size() - 1) << " with raw digit #"
          << digitVec.key();
      } // if failed to add association
    }

    if (wirecol->size() == 0) mf::LogWarning("CalWireT962") << "No wires made for this event.";

    evt.put(std::move(wirecol));
    evt.put(std::move(WireDigitAssn));

    return;
  }

} // end namespace caldata

namespace caldata {

  DEFINE_ART_MODULE(CalWireT962)

} // end namespace caldata