itkStreamingImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkStreamingImageFilter_h
#define itkStreamingImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImageRegionSplitterBase.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT StreamingImageFilter:public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(StreamingImageFilter);

  using Self = StreamingImageFilter;
  using Superclass = ImageToImageFilter< TInputImage, TOutputImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(StreamingImageFilter, ImageToImageFilter);

  using InputImageType = TInputImage;
  using InputImagePointer = typename InputImageType::Pointer;
  using InputImageRegionType = typename InputImageType::RegionType;
  using InputImagePixelType = typename InputImageType::PixelType;

  using OutputImageType = TOutputImage;
  using OutputImagePointer = typename OutputImageType::Pointer;
  using OutputImageRegionType = typename OutputImageType::RegionType;
  using OutputImagePixelType = typename OutputImageType::PixelType;
  using DataObjectPointer = typename Superclass::DataObjectPointer;

  static constexpr unsigned int InputImageDimension = InputImageType::ImageDimension;
  static constexpr unsigned int OutputImageDimension = OutputImageType::ImageDimension;

  using SplitterType = ImageRegionSplitterBase;
  using RegionSplitterPointer = typename SplitterType::Pointer;

  itkSetMacro(NumberOfStreamDivisions, unsigned int);

  itkGetConstReferenceMacro(NumberOfStreamDivisions, unsigned int);

  itkSetObjectMacro(RegionSplitter, SplitterType);
  itkGetModifiableObjectMacro(RegionSplitter, SplitterType);

  void UpdateOutputData(DataObject *output) override;

  void PropagateRequestedRegion(DataObject *output) override;

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( SameDimensionCheck,
                   ( Concept::SameDimension< InputImageDimension, OutputImageDimension > ) );
  itkConceptMacro( InputConvertibleToOutputCheck,
                   ( Concept::Convertible< InputImagePixelType, OutputImagePixelType > ) );
  // End concept checking
#endif

protected:
  StreamingImageFilter();
  ~StreamingImageFilter() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

private:
  unsigned int          m_NumberOfStreamDivisions;
  RegionSplitterPointer m_RegionSplitter;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkStreamingImageFilter.hxx"
#endif

#endif