EVOLUTION-MANAGER

Edit File: spacetodepth_op.h

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==============================================================================*/

#ifndef TENSORFLOW_CORE_KERNELS_SPACETODEPTH_OP_H_
#define TENSORFLOW_CORE_KERNELS_SPACETODEPTH_OP_H_
// Functor definition for XentOp, must be compilable by nvcc.

#include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
#include "tensorflow/core/framework/tensor_types.h"
#include "tensorflow/core/util/tensor_format.h"

namespace tensorflow {
namespace functor {

// Functor used by SpaceToDepthOp to do the computations.
// Implements a family of Space to Depth transforms for a 4D 'input' tensor
// to a 4D 'output' tensor, both tensors use type 'T' and layout 'data_format'.
// These transforms divide the vertical and horizontal image sizes by
// 'block_size', and multiply the depth dimension size by
// (block_size * block_size). The offset within each block_size * block_size
// patch within the image is combined with the input channel index to form
// the output channel index, with the Y, X coordinates within each block of
// the input image used as the high order component of the output channel.
// e.g. for data_format = NHWC:
//      Each element in the input tensor can be specified via 6 coordinates,
//      ordered by decreasing memory layout significance as:
//      n,oY,bY,oX,bX,iC  (where n=batch index, oX, oY means X or Y coordinates
//                         within the output image, bX, bY means coordinates
//                         within the input block, iC means input channels).
//      The output would be a transpose to the following layout:
//      n,oY,oX,bY,bX,iC
template <typename Device, typename T, TensorFormat data_format>
struct SpaceToDepthOpFunctor {
  void operator()(const Device& d, typename TTypes<T, 4>::ConstTensor input,
                  int block_size, typename TTypes<T, 4>::Tensor output);

// This 5-D version is to support NCHW_VECT_C.
  void operator()(const Device& d, typename TTypes<T, 5>::ConstTensor input,
                  int block_size, typename TTypes<T, 5>::Tensor output);
};

}  // namespace functor
}  // namespace tensorflow

#endif  // TENSORFLOW_CORE_KERNELS_SPACETODEPTH_OP_H_