[MSLITE] runtime convert support input buffer

include/api/types.h

@@ -39,8 +39,7 @@ enum ModelType : uint32_t {
   kAIR = 1,
   kOM = 2,
   kONNX = 3,
-  kFlatBuffer = 4,
+  kMindIR_Opt = 4,
-  kMindIR_Opt = 5,
   // insert new data type here
   kUnknownType = 0xFFFFFFFF
 };

mindspore/core/load_mindir/load_model.cc

@@ -133,6 +133,23 @@ std::vector<std::shared_ptr<FuncGraph>> MindIRLoader::LoadMindIRs(std::vector<st
   return funcgraph_vec;
 }
 
+std::shared_ptr<FuncGraph> MindIRLoader::LoadMindIR(const void *buffer, const size_t &size) {
+  /* mindir -> func_graph
+   * only support lite */
+  mind_ir::ModelProto model;
+  auto ret = model.ParseFromArray(buffer, size);
+  if (!ret) {
+    MS_LOG(ERROR) << "ParseFromArray failed.";
+    return nullptr;
+  }
+
+  MSANFModelParser model_parser;
+  model_parser.SetLite();
+  FuncGraphPtr func_graph = model_parser.Parse(model);
+
+  return func_graph;
+}
+
 std::shared_ptr<FuncGraph> MindIRLoader::LoadMindIR(const std::string &file_name) {
   if (file_name.length() > PATH_MAX) {
     MS_LOG(ERROR) << "The length of the file name exceeds the limit.";

mindspore/core/load_mindir/load_model.h

@@ -34,6 +34,7 @@ class MindIRLoader {
 
   bool get_need_renormalize() const { return need_renormalize_; }
   void set_need_renormalize(bool need_renormalize) { need_renormalize_ = need_renormalize; }
+  std::shared_ptr<FuncGraph> LoadMindIR(const void *buffer, const size_t &size);
   std::shared_ptr<FuncGraph> LoadMindIR(const std::string &file_name);
   std::vector<std::shared_ptr<FuncGraph>> LoadMindIRs(const std::vector<std::string> file_names);
 

mindspore/lite/examples/unified_api/src/net_runner.cc

@@ -228,9 +228,9 @@ int NetRunner::Main() {
 
   if (epochs_ > 0) {
     auto trained_fn = ms_file_.substr(0, ms_file_.find_last_of('.')) + "_trained.ms";
-    mindspore::Serialization::ExportModel(*model_, mindspore::kFlatBuffer, trained_fn, mindspore::kNoQuant, false);
+    mindspore::Serialization::ExportModel(*model_, mindspore::kMindIR, trained_fn, mindspore::kNoQuant, false);
     trained_fn = ms_file_.substr(0, ms_file_.find_last_of('.')) + "_infer.ms";
-    mindspore::Serialization::ExportModel(*model_, mindspore::kFlatBuffer, trained_fn, mindspore::kNoQuant, true);
+    mindspore::Serialization::ExportModel(*model_, mindspore::kMindIR, trained_fn, mindspore::kNoQuant, true);
   }
   return 0;
 }

mindspore/lite/src/cxx_api/serialization.cc

@@ -136,7 +136,7 @@ Status Serialization::ExportModel(const Model &model, ModelType model_type, cons
     MS_LOG(ERROR) << "Model is not TrainModel.";
     return kLiteError;
   }
-  if (model_type != kFlatBuffer) {
+  if (model_type != kMindIR && model_type != kMindIR_Opt) {
     MS_LOG(ERROR) << "Unsupported Export Format " << model_type;
     return kLiteParamInvalid;
   }

mindspore/lite/src/lite_session.cc

@@ -1318,67 +1318,66 @@ session::LiteSession *lite::LiteSession::CreateSession(const std::string &model_
   return session;
 }
 
-const char *lite::LiteSession::LoadModelByBuff(const char *model_buf, mindspore::ModelType model_type, size_t size) {
+mindspore::ModelType lite::LiteSession::LoadModelByBuff(const char *model_buf, const size_t &buf_size, char **lite_buf,
+                                                        size_t *size, mindspore::ModelType model_type) {
   if (model_type == mindspore::ModelType::kMindIR_Opt) {
+    *size = buf_size;
+    *lite_buf = const_cast<char *>(model_buf);
+    return mindspore::ModelType::kMindIR_Opt;
+  }
+
+  if (model_type != mindspore::ModelType::kMindIR) {
+    return mindspore::ModelType::kUnknownType;
+  }
+
+  flatbuffers::Verifier verify((const uint8_t *)model_buf, buf_size);
+  auto version_verify = lite::LiteModel::VersionVerify(&verify);
+  if (version_verify != SCHEMA_INVALID) {
+    MS_LOG(DEBUG) << "The kMindIR type model buffer is valid mslite model buffer";
+    *size = buf_size;
+    *lite_buf = const_cast<char *>(model_buf);
+    return mindspore::ModelType::kMindIR_Opt;
+  }
+
+#ifdef RUNTIME_CONVERT
+  *lite_buf = RuntimeConvert(model_buf, buf_size, size);
+#else
+  MS_LOG(ERROR) << "Please enable runtime convert.";
+#endif
+  return mindspore::ModelType::kMindIR;
+}
+
+const char *lite::LiteSession::LoadModelByPath(const std::string &file, mindspore::ModelType model_type, size_t *size) {
+  size_t buf_size;
+  auto model_buf = lite::ReadFile(file.c_str(), &buf_size);
+  if (model_buf == nullptr) {
+    MS_LOG(ERROR) << "The model path is invalid";
     return model_buf;
   }
 
-  if (model_type == mindspore::ModelType::kMindIR) {
+  char *lite_buf = nullptr;
-    flatbuffers::Verifier verify((const uint8_t *)model_buf, size);
+  auto buf_model_type = LoadModelByBuff(model_buf, buf_size, &lite_buf, size, model_type);
-    auto version_verify = lite::LiteModel::VersionVerify(&verify);
+  if (buf_model_type == mindspore::ModelType::kUnknownType || lite_buf == nullptr) {
-    if (version_verify != SCHEMA_INVALID) {
-      MS_LOG(DEBUG) << "The kMindIR type model buffer is valid mslite model buffer";
-      return model_buf;
-    }
-
-#ifdef RUNTIME_CONVERT
-    return RuntimeConvert(model_buf, size);
-#endif
-    MS_LOG(ERROR) << "Please enable runtime convert.";
     return nullptr;
   }
-
+  if (buf_model_type == mindspore::ModelType::kMindIR) {
-  MS_LOG(ERROR) << "Invalid Model Type";
+    free(model_buf);
-  return nullptr;
+    model_buf = nullptr;
+  }
+  return lite_buf;
 }
 
-char *lite::LiteSession::LoadModelByPath(const std::string &file, mindspore::ModelType model_type, size_t *size) {
+int lite::LiteSession::CreateSessionByBuf(const char *model_buf, mindspore::ModelType model_type,
-  if (model_type == mindspore::ModelType::kMindIR_Opt) {
+                                          const size_t &buf_size, session::LiteSession *session) {
-    return lite::ReadFile(file.c_str(), size);
+  size_t lite_buf_size = 0;
-  }
+  char *lite_buf = nullptr;
-
+  auto buf_model_type = LoadModelByBuff(model_buf, buf_size, &lite_buf, &lite_buf_size, model_type);
-  if (model_type == mindspore::ModelType::kMindIR) {
+  if (buf_model_type == mindspore::ModelType::kUnknownType || lite_buf == nullptr) {
-    size_t tmp_size;
-    auto tmp_buf = lite::ReadFile(file.c_str(), &tmp_size);
-    flatbuffers::Verifier verify((const uint8_t *)tmp_buf, tmp_size);
-    auto version_verify = lite::LiteModel::VersionVerify(&verify);
-    if (version_verify != SCHEMA_INVALID) {
-      MS_LOG(DEBUG) << "The kMindIR type model path is valid mslite model";
-      return tmp_buf;
-    }
-    free(tmp_buf);
-    tmp_buf = nullptr;
-
-#ifdef RUNTIME_CONVERT
-    return RuntimeConvert(file, size);
-#endif
-    MS_LOG(ERROR) << "Please enable runtime convert.";
-    return nullptr;
-  }
-
-  MS_LOG(ERROR) << "Invalid Model Type";
-  return nullptr;
-}
-
-int lite::LiteSession::CreateSessionByBuf(const char *model_buf, mindspore::ModelType model_type, size_t size,
-                                          session::LiteSession *session) {
-  auto lite_buf = LoadModelByBuff(model_buf, model_type, size);
-  if (lite_buf == nullptr) {
     MS_LOG(ERROR) << "Invalid model_buf";
     return RET_ERROR;
   }
 
-  auto *model = lite::ImportFromBuffer(model_buf, size, true);
+  auto *model = lite::ImportFromBuffer(lite_buf, lite_buf_size, true);
   if (model == nullptr) {
     MS_LOG(ERROR) << "Import model failed";
     return RET_ERROR;

mindspore/lite/src/lite_session.h

@@ -53,7 +53,7 @@ class LiteSession : public session::LiteSession {
 
   static session::LiteSession *CreateSession(const std::string &model_path, const lite::Context *context);
 
-  static int CreateSessionByBuf(const char *model_buf, mindspore::ModelType model_type, size_t size,
+  static int CreateSessionByBuf(const char *model_buf, mindspore::ModelType model_type, const size_t &buf_size,
                                 session::LiteSession *session);
   static int CreateSessionByPath(const std::string &model_path, mindspore::ModelType model_type,
                                  session::LiteSession *session);
@@ -128,8 +128,9 @@ class LiteSession : public session::LiteSession {
 
   static void FreePackOpWeight(const std::vector<kernel::LiteKernel *> &kernels);
 
-  static const char *LoadModelByBuff(const char *model_buf, mindspore::ModelType model_type, size_t size);
+  static mindspore::ModelType LoadModelByBuff(const char *model_buf, const size_t &buf_size, char **lite_buf,
-  static char *LoadModelByPath(const std::string &file, mindspore::ModelType model_type, size_t *size);
+                                              size_t *size, mindspore::ModelType model_type);
+  static const char *LoadModelByPath(const std::string &file, mindspore::ModelType model_type, size_t *size);
 
  private:
   int PreCheck(Model *model);

mindspore/lite/src/runtime/runtime_convert.cc

@@ -16,78 +16,63 @@
 
 #ifdef RUNTIME_CONVERT
 #include "src/runtime/runtime_convert.h"
-#include "tools/common/graph_util.h"
+#include "include/version.h"
+#include "tools/converter/converter.h"
 #include "tools/converter/converter_flags.h"
-#include "tools/converter/anf_transform.h"
-#include "tools/anf_exporter/anf_exporter.h"
-#include "tools/converter/graphdef_transform.h"
-#include "tools/converter/import/mindspore_importer.h"
 
 namespace mindspore::lite {
-char *RuntimeConvert(const char *model_buf, size_t) {
+char *RuntimeConvert(const char *model_buf, const size_t &buf_size, size_t *size) {
   if (model_buf == nullptr) {
     MS_LOG(ERROR) << "Invalid input model buffer.";
     return nullptr;
   }
-  MS_LOG(ERROR) << "Invalid Now. Use model path for model build.";
+
-  return nullptr;
+  auto flag = std::make_unique<converter::Flags>();
+  flag->fmk = converter::kFmkTypeMs;
+  flag->inputDataType = kTypeUnknown;
+  flag->outputDataType = kTypeUnknown;
+  flag->saveFP16 = false;
+  flag->trainModel = false;
+
+  Converter cvt;
+  auto meta_graph = cvt.Convert(flag, model_buf, buf_size);
+  if (meta_graph == nullptr) {
+    MS_LOG(ERROR) << "Convert failed.";
+    return nullptr;
+  }
+
+  void *lite_buf = nullptr;
+  meta_graph->version = Version();
+  auto status = TransferMetaGraph(*meta_graph, &lite_buf, size);
+  if (status != RET_OK) {
+    MS_LOG(ERROR) << "Transfer model failed.";
+    delete meta_graph;
+    return nullptr;
+  }
+
+  delete meta_graph;
+  return reinterpret_cast<char *>(lite_buf);
 }
 
 char *RuntimeConvert(const std::string &file_path, size_t *size) {
-  void *model_buf = nullptr;
+  auto flag = std::make_unique<converter::Flags>();
-  converter::Flags flag;
+  flag->fmk = converter::kFmkTypeMs;
-  flag.fmk = converter::kFmkTypeMs;
+  flag->modelFile = file_path;
-  flag.modelFile = file_path;
+  flag->inputDataType = kTypeUnknown;
-  flag.inputDataType = kTypeUnknown;
+  flag->outputDataType = kTypeUnknown;
-  flag.outputDataType = kTypeUnknown;
+  flag->saveFP16 = false;
-  flag.saveFP16 = false;
+  flag->trainModel = false;
-  flag.trainModel = false;
 
-  MindsporeImporter ms_import;
+  Converter cvt;
-  FuncGraphPtr func_graph = ms_import.ImportMindIR(flag);
+  auto meta_graph = cvt.Convert(flag);
-  if (func_graph == nullptr) {
+  MS_LOG(ERROR) << "Convert failed.";
-    return nullptr;
-  }
-
-  if (UpdateFuncGraphInputsAndOutputsDtype(func_graph) != RET_OK) {
-    MS_LOG(ERROR) << "Update graph inputs and outputs dtype failed.";
-    return nullptr;
-  }
-
-  // funcgraph compile
-  AnfTransform funcgraph_transform;
-  func_graph = funcgraph_transform.Transform(func_graph, &flag);
-  if (func_graph == nullptr) {
-    MS_LOG(ERROR) << "Transform anf graph return nullptr";
-    return nullptr;
-  }
-
-  // protobuf -> flatbuffer
-  auto meta_graph = Export(func_graph, false, false, false);
   if (meta_graph == nullptr) {
-    MS_LOG(ERROR) << "Export to meta graph return nullptr";
-    return nullptr;
-  }
-
-  // metagraph compile
-  GraphDefTransform metagraph_transform;
-  metagraph_transform.SetGraphDef(meta_graph);
-  auto status = metagraph_transform.Transform(flag);
-  if (status != RET_OK) {
-    MS_LOG(ERROR) << "Transform meta graph failed " << status;
-    delete meta_graph;
-    return nullptr;
-  }
-
-  status = UpdateGraphOutputName(meta_graph);
-  if (status != RET_OK) {
-    MS_LOG(ERROR) << "UpdateGraphOutputName failed.";
-    delete meta_graph;
     return nullptr;
   }
 
+  void *model_buf = nullptr;
   meta_graph->version = Version();
-  status = TransferMetaGraph(*meta_graph, &model_buf, size);
+  auto status = TransferMetaGraph(*meta_graph, &model_buf, size);
   if (status != RET_OK) {
     MS_LOG(ERROR) << "Transfer model failed.";
     delete meta_graph;

mindspore/lite/src/runtime/runtime_convert.h

@@ -20,9 +20,10 @@
 #ifdef RUNTIME_CONVERT
 #include <stdio.h>
 #include <string>
+#include <memory>
 
 namespace mindspore::lite {
-char *RuntimeConvert(const char *model_buf, size_t size);
+char *RuntimeConvert(const char *model_buf, const size_t &buf_size, size_t *size);
 char *RuntimeConvert(const std::string &file_path, size_t *size);
 }  // namespace mindspore::lite
 #endif  // RUNTIME_CONVERT

mindspore/lite/test/CMakeLists.txt

@@ -24,7 +24,6 @@ file(GLOB_RECURSE TEST_UT_SRC
         ${TEST_DIR}/ut/src/scheduler_test.cc
         ${TEST_DIR}/ut/src/registry/registry_test.cc
         ${TEST_DIR}/ut/src/registry/registry_custom_op_test.cc
-        ${TEST_DIR}/ut/src/runtime/runtime_pass_tests.cc
         ${TEST_DIR}/st/multiple_device_test.cc
         ${TEST_DIR}/st/mindrt_parallel_runtime_test.cc
         ${TEST_DIR}/st/mix_data_type_test.cc
@@ -40,6 +39,10 @@ if(MSLITE_ENABLE_RUNTIME_CONVERT)
     list(APPEND TEST_UT_SRC ${TEST_DIR}/ut/src/runtime/runtime_convert_tests.cc)
 endif()
 
+if(MSLITE_ENABLE_RUNTIME_PASS)
+    list(APPEND TEST_UT_SRC ${TEST_DIR}/ut/src/runtime/runtime_pass_tests.cc)
+endif()
+
 if(MSLITE_ENABLE_TRAIN)
     file(GLOB_RECURSE TEST_TRAIN_UT_SRC
             ${TEST_DIR}/ut/src/runtime/kernel/arm/fp32_grad/*.cc
@@ -160,13 +163,14 @@ if(MSLITE_ENABLE_MINDRT)
 endif()
 
 if(MSLITE_ENABLE_CONVERTER)
+    target_link_libraries(lite-test tflite_parser_mid caffe_parser_mid
+                                    onnx_parser_mid tf_parser_mid)
+endif()
+
+if(MSLITE_ENABLE_CONVERTER AND (NOT MSLITE_ENABLE_RUNTIME_CONVERT))
     target_link_libraries(lite-test
             anf_exporter_mid
             mslite_converter_plugin
-            tflite_parser_mid
-            caffe_parser_mid
-            onnx_parser_mid
-            tf_parser_mid
             graph_pass_mid
             fusion_mid
             quantizer_mid

mindspore/lite/test/ut/src/runtime/kernel/arm/cxx_api/serialization_test.cc

@@ -37,13 +37,13 @@ TEST_F(TestCxxApiLiteSerialization, test_load_file_not_exist_FAILED) {
 TEST_F(TestCxxApiLiteSerialization, test_load_file_not_exist_x2_FAILED) {
   std::vector<Graph> graphs;
   auto status =
-    Serialization::Load(std::vector<std::string>(2, "./nets/file_not_exist.mindir"), ModelType::kFlatBuffer, &graphs);
+    Serialization::Load(std::vector<std::string>(2, "./nets/file_not_exist.mindir"), ModelType::kMindIR, &graphs);
   ASSERT_TRUE(status != kSuccess);
 }
 
 TEST_F(TestCxxApiLiteSerialization, test_export_uninitialized_FAILED) {
   Model model;
-  ASSERT_TRUE(Serialization::ExportModel(model, ModelType::kFlatBuffer, "./nets/export.ms") != kSuccess);
+  ASSERT_TRUE(Serialization::ExportModel(model, ModelType::kMindIR, "./nets/export.ms") != kSuccess);
 }
 
 }  // namespace mindspore

mindspore/lite/tools/converter/converter.cc

@@ -77,13 +77,41 @@ FuncGraphPtr Converter::BuildFuncGraph(const converter::Flags &flag) {
   return func_graph;
 }
 
+FuncGraphPtr Converter::BuildFuncGraph(const converter::Flags &flag, const void *buf, const size_t &size) {
+  MindsporeImporter ms_import;
+  FuncGraphPtr func_graph = ms_import.ImportMindIR(flag, buf, size);
+  if (func_graph == nullptr) {
+    MS_LOG(ERROR) << "Get funcGraph failed.";
+    return nullptr;
+  }
+
+  if (UpdateFuncGraphInputsAndOutputsDtype(func_graph) != RET_OK) {
+    MS_LOG(ERROR) << "Update graph inputs and outputs dtype failed.";
+    return nullptr;
+  }
+
+  return func_graph;
+}
+
+schema::MetaGraphT *Converter::Convert(const std::unique_ptr<converter::Flags> &flag, const void *buf,
+                                       const size_t &size) {
+  if (flag == nullptr || buf == nullptr) {
+    MS_LOG(ERROR) << "Input flag is nullptr";
+    return nullptr;
+  }
+  auto graph = BuildFuncGraph(*flag, buf, size);
+  if (graph == nullptr) {
+    MS_LOG(ERROR) << "Parser/Import model return nullptr";
+    return nullptr;
+  }
+  return TransferFuncGraph(flag, graph);
+}
+
 schema::MetaGraphT *Converter::Convert(const std::unique_ptr<converter::Flags> &flag) {
   if (flag == nullptr) {
     MS_LOG(ERROR) << "Input flag is nullptr";
     return nullptr;
   }
-  MS_CHECK_TRUE_MSG(funcgraph_transform_ != nullptr, nullptr, "funcgraph_transform init failed");
-  MS_CHECK_TRUE_MSG(metagraph_transform_ != nullptr, nullptr, "metagraph_transform_ init failed");
 
   // load plugin
   static std::vector<std::shared_ptr<DynamicLibraryLoader>> dl_loaders;
@@ -106,15 +134,23 @@ schema::MetaGraphT *Converter::Convert(const std::unique_ptr<converter::Flags> &
     return nullptr;
   }
 
+  return TransferFuncGraph(flag, graph);
+}
+
+schema::MetaGraphT *Converter::TransferFuncGraph(const std::unique_ptr<converter::Flags> &flag,
+                                                 FuncGraphPtr func_graph) {
+  MS_CHECK_TRUE_MSG(funcgraph_transform_ != nullptr, nullptr, "funcgraph_transform init failed");
+  MS_CHECK_TRUE_MSG(metagraph_transform_ != nullptr, nullptr, "metagraph_transform_ init failed");
+
   // funcgraph compile
-  graph = funcgraph_transform_->Transform(graph, flag.get());
+  func_graph = funcgraph_transform_->Transform(func_graph, flag.get());
-  if (graph == nullptr) {
+  if (func_graph == nullptr) {
     MS_LOG(ERROR) << "Transform anf graph return nullptr";
     return nullptr;
   }
 
   // protobuf -> flatbuffer
-  auto meta_graph = Export(graph, false, false, flag->trainModel);
+  auto meta_graph = Export(func_graph, false, false, flag->trainModel);
   if (meta_graph == nullptr) {
     MS_LOG(ERROR) << "Export to meta graph return nullptr";
     return nullptr;

mindspore/lite/tools/converter/converter.h

@@ -39,7 +39,12 @@ class Converter {
     this->model_parser_ = nullptr;
   }
   schema::MetaGraphT *Convert(const std::unique_ptr<converter::Flags> &flag);
+  schema::MetaGraphT *Convert(const std::unique_ptr<converter::Flags> &flag, const void *buf, const size_t &size);
+
+ private:
   FuncGraphPtr BuildFuncGraph(const converter::Flags &flag);
+  FuncGraphPtr BuildFuncGraph(const converter::Flags &flag, const void *buf, const size_t &size);
+  schema::MetaGraphT *TransferFuncGraph(const std::unique_ptr<converter::Flags> &flag, FuncGraphPtr func_graph);
 
  protected:
   converter::ModelParser *model_parser_ = nullptr;

mindspore/lite/tools/converter/import/mindspore_importer.cc

@@ -246,6 +246,12 @@ void MindsporeImporter::RemoveUnusedGraphInput(const FuncGraphPtr &func_graph) {
   }
 }
 
+FuncGraphPtr MindsporeImporter::ImportMindIR(const converter::Flags &flag, const void *buff, const size_t &size) {
+  MindIRLoader mindir_loader;
+  auto func_graph = mindir_loader.LoadMindIR(buff, size);
+  return CheckAndUpdateFuncGraph(flag, func_graph);
+}
+
 FuncGraphPtr MindsporeImporter::ImportMindIR(const converter::Flags &flag) {
   FuncGraphPtr func_graph;
   if (!flag.dec_key.empty()) {
@@ -264,6 +270,11 @@ FuncGraphPtr MindsporeImporter::ImportMindIR(const converter::Flags &flag) {
     MindIRLoader mindir_loader;
     func_graph = mindir_loader.LoadMindIR(flag.modelFile);
   }
+
+  return CheckAndUpdateFuncGraph(flag, func_graph);
+}
+
+FuncGraphPtr MindsporeImporter::CheckAndUpdateFuncGraph(const converter::Flags &flag, FuncGraphPtr func_graph) {
   if (func_graph == nullptr) {
     MS_LOG(ERROR) << "get funcGraph failed for fmk:MINDIR";
     MS_LOG(ERROR)

mindspore/lite/tools/converter/import/mindspore_importer.h

@@ -29,11 +29,13 @@ class MindsporeImporter {
   MindsporeImporter() = default;
   ~MindsporeImporter() = default;
   FuncGraphPtr ImportMindIR(const converter::Flags &flag);
+  FuncGraphPtr ImportMindIR(const converter::Flags &flag, const void *buff, const size_t &size);
 
  private:
   static void RemoveUnusedGraphInput(const FuncGraphPtr &func_graph);
   STATUS ProcessDependCnode(const CNodePtr &cnode);
   STATUS GetFuncGraphOutputName(const CNodePtr &cnode);
+  FuncGraphPtr CheckAndUpdateFuncGraph(const converter::Flags &flag, FuncGraphPtr func_graph);
   STATUS Mindir2AnfAdjust(const FuncGraphPtr &func_graph, const converter::Flags &flag);
   size_t Hex2ByteArray(const std::string &hex_str, unsigned char *byte_array, size_t max_len);
   std::vector<std::string> output_tensor_name_;