frms6_reader.cpp

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// Copyright (C) 2011 Lutz Foucar

/**
 * @file frms6_reader.cpp contains class to read frms6 files
 *                        created by Xonline
 *
 * @author Lutz Foucar
 */

#include <iterator>

#include "frms6_reader.h"

#include "cass_event.h"
#include "cass.h"
#include "pixeldetector.hpp"

using namespace cass;
using namespace pixeldetector;
using namespace std;
using Streaming::operator >>;

Frms6Reader::Frms6Reader()
  : FileReader("frms6")
{}

void Frms6Reader::loadSettings()
{
}

void Frms6Reader::readHeaderInfo(std::ifstream &file)
{
  file >> _fileHead;
}

bool Frms6Reader::operator ()(ifstream &file, CASSEvent& evt)
{
  /** read frame header and calculate the frame data size from the contained
   *  info. Set the eventid according to the id in the info Then read the frame
   *  from the stream into the frame buffer.
   */
  file >> _frameHead;
  evt.id() = _frameHead.external_id;
  const size_t framesize(_fileHead.the_width * _frameHead.the_height);
  const size_t framesizeBytes(framesize * sizeof(hllDataTypes::pixel));
  _hllFrameBuffer.resize(framesize);
  file.read(reinterpret_cast<char*>(&_hllFrameBuffer.front()), framesizeBytes);

  /** get the detector associated with the frame info id from the event */
  CASSEvent::devices_t &devices(evt.devices());
  CASSEvent::devices_t::iterator devIt(devices.find(CASSEvent::PixelDetectors));
  if(devIt == devices.end())
    throw runtime_error("Frms6Reader: There is no pixeldetector device within the CASSEvent");
  Device &dev(dynamic_cast<Device&>(*(devIt->second)));
  Detector &det(dev.dets()[_frameHead.id]);
  det.id() = evt.id();

  /** set the information of the frame to the detector */
  det.columns() = _fileHead.the_width/2;
  det.rows()    = _frameHead.the_height*2;
  det.frame().resize(_hllFrameBuffer.size());

  /** convert hll frame format to cass frame format */
  size_t quadrantColumns = _frameHead.the_height;
  size_t quadrantRows = quadrantColumns; /** @todo: read out somehow? */
  size_t HLLColumns = _fileHead.the_width;
  hllDataTypes::HLL2CASS(_hllFrameBuffer,det.frame(),quadrantColumns,quadrantRows,HLLColumns);

  return (evt.id());
}