ECAT966ListmodeInputFileFormat.h

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#ifndef __stir_IO_ECAT966ListmodeInputFileFormat_h__
#define __stir_IO_ECAT966ListmodeInputFileFormat_h__
/*
    Copyright (C) 2011, Hammersmith Imanet Ltd
    Copyright (C) 2013-2014, University College London
    This file is part of STIR.
    SPDX-License-Identifier: Apache-2.0
 
    See STIR/LICENSE.txt for details
*/
#include "stir/IO/InputFileFormat.h"
#include "stir/listmode/CListModeDataECAT.h"
#include "stir/listmode/CListRecordECAT966.h"
 
#include "stir/utilities.h"
#include "stir/info.h"
#include "stir/error.h"
#include <string>
#include "stir/format.h"
 
#ifndef HAVE_LLN_MATRIX
#  error HAVE_LLN_MATRIX not define: you need the lln ecat library.
#endif
 
#include "stir/IO/stir_ecat7.h"
START_NAMESPACE_STIR
START_NAMESPACE_ECAT
START_NAMESPACE_ECAT7


class ECAT966ListmodeInputFileFormat : public InputFileFormat<ListModeData>
{
public:
  virtual const std::string get_name() const { return "ECAT966"; }

  virtual bool can_read(const FileSignature& signature, std::istream& input) const
  {
    return this->actual_can_read(signature, input);
  }

  virtual bool can_read(const FileSignature& signature, const std::string& singles_filename) const
  {
    if (strncmp(signature.get_signature(), "MATRIX", 6) != 0)
      return false;
 
    // const string singles_filename = listmode_filename_prefix + "_1.sgl";
    std::ifstream singles_file(singles_filename.c_str(), std::ios::binary);
    char buffer[sizeof(Main_header)];
    Main_header singles_main_header;
    singles_file.read(buffer, sizeof(singles_main_header));
    if (!singles_file)
      return false;
    unmap_main_header(buffer, &singles_main_header);
    shared_ptr<Scanner> scanner_sptr;
    ecat::ecat7::find_scanner(scanner_sptr, singles_main_header);
    if (scanner_sptr->get_type() == Scanner::E966)
      return true;
 
    return false;
  }
 
protected:
  virtual bool actual_can_read(const FileSignature& signature, std::istream& input) const
  {
    warning("can_read for ECAT966 listmode data with istream not implemented %s:%d. Sorry", __FILE__, __LINE__);
    return false;
 
    if (strncmp(signature.get_signature(), "MATRIX", 6) != 0)
      return false;
 
    // TODO
    // return (is_ECAT7_image_file(filename))
    return true;
  }
 
public:
  virtual unique_ptr<data_type> read_from_file(std::istream& input) const
  {
    // cannot do this as need both .sgl and .lm
    error("read_from_file for ECAT966 listmode data with istream not implemented %s:%d. Sorry", __FILE__, __LINE__);
    return unique_ptr<data_type>();
  }


  virtual unique_ptr<data_type> read_from_file(const std::string& filename) const
  {
    // filename points to the .sgl file, but we need the prefix
    std::string::size_type pos = find_pos_of_extension(filename);
    // also remove _1 at the end (if present)
    if (pos != std::string::npos && pos > 2 && filename.substr(pos - 2, 2) == "_1")
      {
        pos -= 2;
      }
    const std::string filename_prefix = filename.substr(0, pos);
    info("Reading ECAT listmode file with prefix " + filename_prefix);
 
    return unique_ptr<data_type>(new ecat::ecat7::CListModeDataECAT<ecat::ecat7::CListRecordECAT966>(filename_prefix));
  }
};
 
END_NAMESPACE_ECAT
END_NAMESPACE_ECAT7
END_NAMESPACE_STIR
 
#endif