ModelImporter.hpp

/*
 * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
 *
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 * to deal in the Software without restriction, including without limitation
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 * Software is furnished to do so, subject to the following conditions:
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 * The above copyright notice and this permission notice shall be included in
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#pragma once

#include "NvOnnxParser.h"
#include "ImporterContext.hpp"
#include "utils.hpp"
#include "builtin_op_importers.hpp"

namespace onnx2trt {

class ModelImporter final : public nvonnxparser::IParser {
  string_map<NodeImporter> _op_importers;
  ImporterContext _importer_ctx;
  std::list<::ONNX_NAMESPACE::ModelProto> _onnx_models; // Needed for ownership of weights
  int _current_node;
  std::vector<Status> _errors;

  Status importModel(::ONNX_NAMESPACE::ModelProto const& model);
  NodeImportResult importNode(::ONNX_NAMESPACE::NodeProto const& node,
                              std::vector<TensorOrWeights>& inputs);
public:
  ModelImporter(nvinfer1::INetworkDefinition* network,
                nvinfer1::ILogger* logger)
    : _op_importers(getBuiltinOpImporterMap()),
      _importer_ctx(network, logger) {}
  bool parse(void const* serialized_onnx_model,
             size_t      serialized_onnx_model_size) override;
  bool supportsOperator(const char* op_name) const override;
  void destroy() override { delete this; }
  //virtual void registerOpImporter(std::string op,
  //                                NodeImporter const &node_importer) override {
  //  // Note: This allows existing importers to be replaced
  //  _op_importers[op] = node_importer;
  //}
  //virtual Status const &setInput(const char *name,
  //                               nvinfer1::ITensor *input) override;
  //virtual Status const& setOutput(const char* name, nvinfer1::ITensor** output) override;
  int getNbErrors() const override { return _errors.size(); }
  nvonnxparser::IParserError const* getError(int index) const override {
    assert(0 <= index && index < _errors.size());
    return &_errors[index];
  }
  void clearErrors() override { _errors.clear(); }
};

} // namespace onnx2trt