CMSSW_4_4_3_patch1/src/DQM/SiStripCommissioningAnalysis/src/FedTimingAlgorithm.cc

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#include "DQM/SiStripCommissioningAnalysis/interface/FedTimingAlgorithm.h"
#include "CondFormats/SiStripObjects/interface/FedTimingAnalysis.h" 
#include "DataFormats/SiStripCommon/interface/SiStripHistoTitle.h"
#include "DataFormats/SiStripCommon/interface/SiStripEnumsAndStrings.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "TProfile.h"
#include "TH1.h"
#include <iostream>
#include <iomanip>
#include <cmath>

using namespace sistrip;

// ----------------------------------------------------------------------------
// 
FedTimingAlgorithm::FedTimingAlgorithm( const edm::ParameterSet & pset, FedTimingAnalysis* const anal ) 
  : CommissioningAlgorithm(anal),
    histo_(0,"")
{;}

// ----------------------------------------------------------------------------
// 
void FedTimingAlgorithm::extract( const std::vector<TH1*>& histos ) { 
  
  if ( !anal() ) {
    edm::LogWarning(mlCommissioning_)
      << "[FedTimingAlgorithm::" << __func__ << "]"
      << " NULL pointer to Analysis object!";
    return; 
  }
  
  // Check number of histograms
  if ( histos.size() != 1 ) {
    anal()->addErrorCode(sistrip::numberOfHistos_);
  }
  
  // Extract FED key from histo title
  if ( !histos.empty() ) { anal()->fedKey( extractFedKey( histos.front() ) ); }
  
  // Extract histograms
  std::vector<TH1*>::const_iterator ihis = histos.begin();
  for ( ; ihis != histos.end(); ihis++ ) {
    
    // Check for NULL pointer
    if ( !(*ihis) ) { continue; }
    
    // Check name
    SiStripHistoTitle title( (*ihis)->GetName() );
    if ( title.runType() != sistrip::FED_TIMING ) {
      anal()->addErrorCode(sistrip::unexpectedTask_);
      continue;
    }
    
    // Extract timing histo
    histo_.first = *ihis;
    histo_.second = (*ihis)->GetName();
    
  }

}

// ----------------------------------------------------------------------------
// 
void FedTimingAlgorithm::analyse() { 

  if ( !anal() ) {
    edm::LogWarning(mlCommissioning_)
      << "[FedTimingAlgorithm::" << __func__ << "]"
      << " NULL pointer to base Analysis object!";
    return; 
  }

  CommissioningAnalysis* tmp = const_cast<CommissioningAnalysis*>( anal() );
  FedTimingAnalysis* anal = dynamic_cast<FedTimingAnalysis*>( tmp );
  if ( !anal ) {
    edm::LogWarning(mlCommissioning_)
      << "[FedTimingAlgorithm::" << __func__ << "]"
      << " NULL pointer to derived Analysis object!";
    return; 
  }

  if ( !histo_.first ) {
    anal->addErrorCode(sistrip::nullPtr_);
    return;
  }
  
  // Transfer histogram contents/errors/stats to containers
  uint16_t non_zero = 0;
  float max = -1.e9;
  float min =  1.e9;
  uint16_t nbins = static_cast<uint16_t>( histo_.first->GetNbinsX() );
  std::vector<float> bin_contents; 
  std::vector<float> bin_errors;
  std::vector<float> bin_entries;
  bin_contents.reserve( nbins );
  bin_errors.reserve( nbins );
  bin_entries.reserve( nbins );
  for ( uint16_t ibin = 0; ibin < nbins; ibin++ ) {
    bin_contents.push_back( histo_.first->GetBinContent(ibin+1) );
    bin_errors.push_back( histo_.first->GetBinError(ibin+1) );
    //bin_entries.push_back( histo_.first->GetBinEntries(ibin+1) );
    if ( bin_entries[ibin] ) { 
      if ( bin_contents[ibin] > max ) { max = bin_contents[ibin]; }
      if ( bin_contents[ibin] < min ) { min = bin_contents[ibin]; }
      non_zero++;
    }
  }

  //LogTrace(mlCommissioning_) << " Number of bins with non-zero entries: " << non_zero;
  if ( bin_contents.size() < 100 ) { 
    anal->addErrorCode(sistrip::numberOfBins_);
    return; 
  }
  
  // Calculate range (max-min) and threshold level (range/2)
  float range = max - min;
  float threshold = min + range / 2.;
  if ( range < 50. ) {
    anal->addErrorCode(sistrip::smallDataRange_);
    return; 
  }
  //LogTrace(mlCommissioning_) << " ADC samples: max/min/range/threshold: " 
  //<< max << "/" << min << "/" << range << "/" << threshold;
  
  // Associate samples with either "tick mark" or "baseline"
  std::vector<float> tick;
  std::vector<float> base;
  for ( uint16_t ibin = 0; ibin < nbins; ibin++ ) { 
    if ( bin_entries[ibin] ) {
      if ( bin_contents[ibin] < threshold ) { 
        base.push_back( bin_contents[ibin] ); 
      } else { 
        tick.push_back( bin_contents[ibin] ); 
      }
    }
  }
  //LogTrace(mlCommissioning_) << " Number of 'tick mark' samples: " << tick.size() 
  //<< " Number of 'baseline' samples: " << base.size();
  
  // Find median level of tick mark and baseline
  float tickmark = 0.;
  float baseline = 0.;
  sort( tick.begin(), tick.end() );
  sort( base.begin(), base.end() );
  if ( !tick.empty() ) { tickmark = tick[ tick.size()%2 ? tick.size()/2 : tick.size()/2 ]; }
  if ( !base.empty() ) { baseline = base[ base.size()%2 ? base.size()/2 : base.size()/2 ]; }
  //LogTrace(mlCommissioning_) << " Tick mark level: " << tickmark << " Baseline level: " << baseline
  //<< " Range: " << (tickmark-baseline);
  if ( (tickmark-baseline) < 50. ) {
    anal->addErrorCode(sistrip::smallDataRange_);
    return; 
  }
  
  // Find rms spread in "baseline" samples
  float mean = 0.;
  float mean2 = 0.;
  for ( uint16_t ibin = 0; ibin < base.size(); ibin++ ) {
    mean += base[ibin];
    mean2 += base[ibin] * base[ibin];
  }
  if ( !base.empty() ) { 
    mean = mean / base.size();
    mean2 = mean2 / base.size();
  } else { 
    mean = 0.; 
    mean2 = 0.; 
  }
  float baseline_rms = 0.;
  if (  mean2 > mean*mean ) { baseline_rms = sqrt( mean2 - mean*mean ); }
  else { baseline_rms = 0.; }
  //LogTrace(mlCommissioning_) << " Spread in baseline samples: " << baseline_rms;
  
  // Find rising edges (derivative across two bins > range/2) 
  std::map<uint16_t,float> edges;
  for ( uint16_t ibin = 1; ibin < nbins-1; ibin++ ) {
    if ( bin_entries[ibin+1] && 
         bin_entries[ibin-1] ) {
      float derivative = bin_contents[ibin+1] - bin_contents[ibin-1];
      if ( derivative > 5.*baseline_rms ) {
        edges[ibin] = derivative;
        //LogTrace(mlCommissioning_) << " Found edge #" << edges.size() << " at bin " << ibin 
        //<< " and with derivative " << derivative;
      }
    }
  }
  
  // Iterate through "edges" std::map
  bool found = false;
  uint16_t deriv_bin = sistrip::invalid_;
  float max_deriv = -1.*sistrip::invalid_;
  std::map<uint16_t,float>::iterator iter = edges.begin();
  while ( !found && iter != edges.end() ) {

    // Iterate through 50 subsequent samples
    bool valid = true;
    for ( uint16_t ii = 0; ii < 50; ii++ ) {
      uint16_t bin = iter->first + ii;

      // Calc local derivative 
      float temp_deriv = 0;
      if ( static_cast<uint32_t>(bin)   < 1 ||
           static_cast<uint32_t>(bin+1) >= nbins ) { continue; }
      temp_deriv = bin_contents[bin+1] - bin_contents[bin-1];
      
      // Store max derivative
      if ( temp_deriv > max_deriv ) {
        max_deriv = temp_deriv;
        deriv_bin = bin;
      }

      // Check if samples following edge are all "high"
      if ( ii > 10 && ii < 40 && bin_entries[bin] &&
           bin_contents[bin] < baseline + 5*baseline_rms ) { valid = false; }

    }

    // Break from loop if tick mark found
    if ( valid ) { found = true; }
    else {
      max_deriv = -1.*sistrip::invalid_;
      deriv_bin = sistrip::invalid_;
      edges.erase(iter);
    }

    iter++;
  }
  
  // Set monitorables (but not PLL coarse and fine here)
  if ( !edges.empty() ) {
    anal->time_      = deriv_bin;
    anal->error_     = 0.;
    anal->base_      = baseline;
    anal->peak_      = tickmark;
    anal->height_    = tickmark - baseline;
  } else {
    anal->addErrorCode(sistrip::missingTickMark_);
    anal->base_   = baseline;
    anal->peak_   = tickmark;
    anal->height_ = tickmark - baseline;
  }
  
}