itkVnlRealToHalfHermitianForwardFFTImageFilter.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
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 *         http://www.apache.org/licenses/LICENSE-2.0.txt
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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#include "itkRealToHalfHermitianForwardFFTImageFilter.h"

#ifndef itkVnlRealToHalfHermitianForwardFFTImageFilter_h
#define itkVnlRealToHalfHermitianForwardFFTImageFilter_h

#include "itkVnlFFTCommon.h"
#include "vnl/algo/vnl_fft_base.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage=Image< std::complex<typename TInputImage::PixelType>, TInputImage::ImageDimension> >
class ITK_TEMPLATE_EXPORT VnlRealToHalfHermitianForwardFFTImageFilter:
  public RealToHalfHermitianForwardFFTImageFilter< TInputImage, TOutputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(VnlRealToHalfHermitianForwardFFTImageFilter);

  using InputImageType = TInputImage;
  using InputPixelType = typename InputImageType::PixelType;
  using InputSizeType = typename InputImageType::SizeType;
  using InputSizeValueType = typename InputImageType::SizeValueType;
  using OutputImageType = TOutputImage;
  using OutputPixelType = typename OutputImageType::PixelType;
  using OutputSizeType = typename OutputImageType::SizeType;

  using Self = VnlRealToHalfHermitianForwardFFTImageFilter;
  using Superclass = RealToHalfHermitianForwardFFTImageFilter<  TInputImage, TOutputImage>;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(VnlRealToHalfHermitianForwardFFTImageFilter,
               RealToHalfHermitianForwardFFTImageFilter);

  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;
  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;

  SizeValueType GetSizeGreatestPrimeFactor() const override;

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( ImageDimensionsMatchCheck,
                   ( Concept::SameDimension< InputImageDimension, OutputImageDimension > ) );
  // End concept checking
#endif

protected:
  VnlRealToHalfHermitianForwardFFTImageFilter() = default;
  ~VnlRealToHalfHermitianForwardFFTImageFilter() override = default;

  void GenerateData() override;

private:
  using SignalVectorType = vnl_vector< std::complex< InputPixelType > >;
};
}

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

#endif