ForwardProjectorByBinParallelproj.h

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//
//

#ifndef __stir_gpu_ForwardProjectorByBinParallelproj_h__
#define __stir_gpu_ForwardProjectorByBinParallelproj_h__

/*
    Copyright (C) 2019, 2021 University College London
    This file is part of STIR.

    SPDX-License-Identifier: Apache-2.0

    See STIR/LICENSE.txt for details
*/

#include "stir/RegisteredParsingObject.h"
#include "stir/recon_buildblock/ForwardProjectorByBin.h"

START_NAMESPACE_STIR

class ProjDataInMemory;
class DataSymmetriesForViewSegmentNumbers;
namespace detail
{
class ParallelprojHelper;
}

class ForwardProjectorByBinParallelproj : public RegisteredParsingObject<ForwardProjectorByBinParallelproj, ForwardProjectorByBin>
{
public:
  static const char* const registered_name;

  // inline
  ForwardProjectorByBinParallelproj();

  ~ForwardProjectorByBinParallelproj() override;

  void initialise_keymap() override;


  void set_up(const shared_ptr<const ProjDataInfo>& proj_data_info_ptr,
              const shared_ptr<const DiscretisedDensity<3, float>>& density_info_sptr // TODO should be Info only
              ) override;

  const DataSymmetriesForViewSegmentNumbers* get_symmetries_used() const override;

  void set_input(const DiscretisedDensity<3, float>&) override;

  void set_defaults() override;

  void set_verbosity(const bool verbosity) { _cuda_verbosity = verbosity; }

  void set_use_truncation(const bool use_truncation) { _use_truncation = use_truncation; }

  // set/get number of gpu chunks to use
  void set_num_gpu_chunks(int num_gpu_chunks) { _num_gpu_chunks = num_gpu_chunks; }
  int get_num_gpu_chunks() { return _num_gpu_chunks; }

protected:
  void actual_forward_project(RelatedViewgrams<float>& viewgrams,
                              const int min_axial_pos_num,
                              const int max_axial_pos_num,
                              const int min_tangential_pos_num,
                              const int max_tangential_pos_num) override;

private:
  shared_ptr<DataSymmetriesForViewSegmentNumbers> _symmetries_sptr;
  shared_ptr<ProjDataInMemory> _projected_data_sptr;
  shared_ptr<detail::ParallelprojHelper> _helper;
  bool _do_not_setup_helper;
  friend class ProjectorByBinPairUsingParallelproj;
  void set_helper(shared_ptr<detail::ParallelprojHelper>);
  bool _cuda_verbosity;
  bool _use_truncation;
  int _num_gpu_chunks;
};

END_NAMESPACE_STIR

#endif // __stir_gpu_ForwardProjectorByBinParallelproj_h__