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3rdparty/opencv-4.5.4/modules/dnn/src/graph_simplifier.hpp 3.6 KB
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.
  
  // Copyright (C) 2020, Intel Corporation, all rights reserved.
  // Third party copyrights are property of their respective owners.
  
  #ifndef __OPENCV_DNN_GRAPH_SIMPLIFIER_HPP__
  #define __OPENCV_DNN_GRAPH_SIMPLIFIER_HPP__
  
  #include <string>
  
  #include <opencv2/core.hpp>
  
  namespace cv { namespace dnn {
  
  class ImportNodeWrapper
  {
  public:
      virtual ~ImportNodeWrapper() {};
  
      virtual int getNumInputs() const = 0;
  
      virtual std::string getInputName(int idx) const = 0;
  
      virtual std::string getType() const = 0;
  
      virtual void setType(const std::string& type) = 0;
  
      virtual void setInputNames(const std::vector<std::string>& inputs) = 0;
  };
  
  class ImportGraphWrapper
  {
  public:
      virtual ~ImportGraphWrapper() {};
  
      virtual Ptr<ImportNodeWrapper> getNode(int idx) const = 0;
  
      virtual int getNumNodes() const = 0;
  
      virtual int getNumOutputs(int nodeId) const = 0;
  
      virtual std::string getOutputName(int nodeId, int outId) const = 0;
  
      virtual void removeNode(int idx) = 0;
  };
  
  class Subgraph  // Interface to match and replace subgraphs.
  {
  public:
      virtual ~Subgraph();
  
      // Add a node to be matched in the origin graph. Specify ids of nodes that
      // are expected to be inputs. Returns id of a newly added node.
      // TODO: Replace inputs to std::vector<int> in C++11
      int addNodeToMatch(const std::string& op, int input_0 = -1, int input_1 = -1,
                         int input_2 = -1, int input_3 = -1);
  
      int addNodeToMatch(const std::string& op, const std::vector<int>& inputs_);
  
      // Specify resulting node. All the matched nodes in subgraph excluding
      // input nodes will be fused into this single node.
      // TODO: Replace inputs to std::vector<int> in C++11
      void setFusedNode(const std::string& op, int input_0 = -1, int input_1 = -1,
                        int input_2 = -1, int input_3 = -1, int input_4 = -1,
                        int input_5 = -1);
  
      void setFusedNode(const std::string& op, const std::vector<int>& inputs_);
  
      static int getInputNodeId(const Ptr<ImportGraphWrapper>& net,
                                const Ptr<ImportNodeWrapper>& node,
                                int inpId);
  
      // Match TensorFlow subgraph starting from <nodeId> with a set of nodes to be fused.
      // Const nodes are skipped during matching. Returns true if nodes are matched and can be fused.
      virtual bool match(const Ptr<ImportGraphWrapper>& net, int nodeId,
                         std::vector<int>& matchedNodesIds,
                         std::vector<int>& targetNodesIds);
  
      // Fuse matched subgraph.
      void replace(const Ptr<ImportGraphWrapper>& net, const std::vector<int>& matchedNodesIds,
                   const std::vector<int>& targetNodesIds);
  
      virtual void finalize(const Ptr<ImportGraphWrapper>& net,
                            const Ptr<ImportNodeWrapper>& fusedNode,
                            std::vector<Ptr<ImportNodeWrapper> >& inputs);
  
  private:
      std::vector<std::string> nodes;         // Nodes to be matched in the origin graph.
      std::vector<std::vector<int> > inputs;  // Connections of an every node to it's inputs.
  
      std::string fusedNodeOp;           // Operation name of resulting fused node.
      std::vector<int> fusedNodeInputs;  // Inputs of fused node.
  };
  
  void simplifySubgraphs(const Ptr<ImportGraphWrapper>& net,
                         const std::vector<Ptr<Subgraph> >& patterns);
  
  }}  // namespace dnn, namespace cv
  
  #endif  // __OPENCV_DNN_GRAPH_SIMPLIFIER_HPP__