reorg.hpp
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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
#ifndef OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_REORG_HPP
#define OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_REORG_HPP
#include "../../op_cuda.hpp"
#include "../csl/stream.hpp"
#include "../kernels/permute.hpp"
#include <opencv2/core.hpp>
#include <vector>
#include <utility>
namespace cv { namespace dnn { namespace cuda4dnn {
template <class T>
class ReorgOp final : public CUDABackendNode {
public:
using wrapper_type = GetCUDABackendWrapperType<T>;
ReorgOp(csl::Stream stream_, std::size_t stride_)
: stream(std::move(stream_)), stride{ stride_ } { }
void forward(
const std::vector<cv::Ptr<BackendWrapper>>& inputs,
const std::vector<cv::Ptr<BackendWrapper>>& outputs,
csl::Workspace& workspace) override
{
CV_Assert(inputs.size() == 1 && outputs.size() == 1);
auto input_wrapper = inputs[0].dynamicCast<wrapper_type>();
auto input = input_wrapper->getView();
auto output_wrapper = outputs[0].dynamicCast<wrapper_type>();
auto output = output_wrapper->getSpan();
const std::size_t permute_input_shape[] = {
input.get_axis_size(0),
input.get_axis_size(1) * input.get_axis_size(2) / (stride * stride),
stride,
input.get_axis_size(3),
stride
};
constexpr std::size_t order[] = { 0, 2, 4, 1, 3 };
const std::size_t permute_output_shape[] = {
permute_input_shape[order[0]],
permute_input_shape[order[1]],
permute_input_shape[order[2]],
permute_input_shape[order[3]],
permute_input_shape[order[4]]
};
input.unsqueeze();
input.reshape(std::begin(permute_input_shape), std::end(permute_input_shape));
output.unsqueeze();
output.reshape(std::begin(permute_output_shape), std::end(permute_output_shape));
kernels::permute(stream, output, input, { std::begin(order), std::end(order) });
}
private:
csl::Stream stream;
std::size_t stride;
};
}}} /* namespace cv::dnn::cuda4dnn */
#endif /* OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_REORG_HPP */