modules/dnn/src/cuda4dnn/primitives/const.hpp

   1 // This file is part of OpenCV project.
   2 // It is subject to the license terms in the LICENSE file found in the top-level directory
   3 // of this distribution and at http://opencv.org/license.html.
   4
   5 #ifndef OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_CONST_HPP
   6 #define OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_CONST_HPP
   7
   8 #include "../../op_cuda.hpp"
   9
  10 #include "../csl/stream.hpp"
  11 #include "../csl/tensor.hpp"
  12 #include "../csl/tensor_ops.hpp"
  13
  14 #include <opencv2/core.hpp>
  15
  16 #include <utility>
  17
  18 namespace cv { namespace dnn { namespace cuda4dnn {
  19
  20     template <class T>
  21     class ConstOp final : public CUDABackendNode {
  22     public:
  23         using wrapper_type = GetCUDABackendWrapperType<T>;
  24
  25         ConstOp(csl::Stream stream_, const cv::Mat& data)
  26             : stream(std::move(stream_))
  27         {
  28             constTensor = csl::makeTensorHeader<T>(data);
  29             csl::copyMatToTensor<T>(data, constTensor, stream);
  30         }
  31
  32         void forward(
  33             const std::vector<cv::Ptr<BackendWrapper>>& inputs,
  34             const std::vector<cv::Ptr<BackendWrapper>>& outputs,
  35             csl::Workspace& workspace) override
  36         {
  37             CV_Assert(outputs.size() == 1 && inputs.size() == 0);
  38
  39             auto output_wrapper = outputs[0].dynamicCast<wrapper_type>();
  40             auto output = output_wrapper->getSpan();
  41             csl::tensor_ops::copy<T>(stream, output, constTensor);
  42         }
  43
  44     private:
  45         csl::Stream stream;
  46         csl::Tensor<T> constTensor;
  47     };
  48
  49 }}} /* namespace cv::dnn::cuda4dnn */
  50
  51 #endif /* OPENCV_DNN_SRC_CUDA4DNN_PRIMITIVES_CONST_HPP */