ArrayFilter1DUsingConvolution.h

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//
//
/*
    Copyright (C) 2000- 2010, Hammersmith Imanet Ltd
    This file is part of STIR.

    SPDX-License-Identifier: Apache-2.0

    See STIR/LICENSE.txt for details
*/

#ifndef __stir_ArrayFilter1DUsingConvolution_H__
#define __stir_ArrayFilter1DUsingConvolution_H__

#include "stir/ArrayFunctionObject_2ArgumentImplementation.h"
#include "stir/BoundaryConditions.h"

START_NAMESPACE_STIR

template <typename elemT>
class VectorWithOffset;

template <typename elemT>
class ArrayFilter1DUsingConvolution : public ArrayFunctionObject_2ArgumentImplementation<1, elemT>
{
public:
  ArrayFilter1DUsingConvolution();


  ArrayFilter1DUsingConvolution(const VectorWithOffset<elemT>& filter_kernel,
                                const BoundaryConditions::BC bc = BoundaryConditions::zero);

  bool is_trivial() const override;

  Succeeded get_influencing_indices(IndexRange<1>& influencing_indices, const IndexRange<1>& output_indices) const override;

  Succeeded get_influenced_indices(IndexRange<1>& influenced_indices, const IndexRange<1>& input_indices) const override;

private:
  VectorWithOffset<elemT> filter_coefficients;
  BoundaryConditions::BC _bc;
  void do_it(Array<1, elemT>& out_array, const Array<1, elemT>& in_array) const override;
};

END_NAMESPACE_STIR

#endif // ArrayFilter1DUsingConvolution