f4334277
 Hu Chunming
提交3rdparty
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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_SHUFFLE_CHANNEL_HPP
#define OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_SHUFFLE_CHANNEL_HPP
#include "../../op_cuda.hpp"
#include "../csl/stream.hpp"
#include "../csl/tensor_ops.hpp"
#include "../kernels/permute.hpp"
#include <opencv2/core.hpp>
#include <vector>
#include <utility>
namespace cv { namespace dnn { namespace cuda4dnn {
template <class T>
class ShuffleChannelOp final : public CUDABackendNode {
public:
using wrapper_type = GetCUDABackendWrapperType<T>;
ShuffleChannelOp(csl::Stream stream_, std::size_t group_)
: stream(std::move(stream_)), group{ group_ } { }
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();
if (group == 1) {
/* permute is redundant; check else branch to know why */
if (input.get() != output.get()) {
input.reshape_as(output);
csl::tensor_ops::copy(stream, output, input);
}
} else {
const std::size_t permute_input_shape[] = {
input.get_axis_size(0),
group,
input.get_axis_size(1) / group,
input.get_axis_size(2) * input.get_axis_size(3)
};
constexpr std::size_t order[] = { 0, 2, 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]],
};
input.reshape(std::begin(permute_input_shape), std::end(permute_input_shape));
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 group;
};
}}} /* namespace cv::dnn::cuda4dnn */
#endif /* OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_SHUFFLE_CHANNEL_HPP */
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