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[Runtime] EdgeTPU runtime for Coral Boards (apache#4698)
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
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| /*! | ||
| * \file edgetpu_runtime.cc | ||
| */ | ||
| #include <tvm/runtime/registry.h> | ||
| #include <tensorflow/lite/interpreter.h> | ||
| #include <tensorflow/lite/kernels/register.h> | ||
| #include <tensorflow/lite/model.h> | ||
| #include <edgetpu.h> | ||
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| #include "edgetpu_runtime.h" | ||
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| namespace tvm { | ||
| namespace runtime { | ||
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| void EdgeTPURuntime::Init(const std::string& tflite_model_bytes, | ||
| TVMContext ctx) { | ||
| const char* buffer = tflite_model_bytes.c_str(); | ||
| size_t buffer_size = tflite_model_bytes.size(); | ||
| // Load compiled model as a FlatBufferModel | ||
| std::unique_ptr<tflite::FlatBufferModel> model = | ||
| tflite::FlatBufferModel::BuildFromBuffer(buffer, buffer_size); | ||
| // Build resolver | ||
| tflite::ops::builtin::BuiltinOpResolver resolver; | ||
| // Init EdgeTPUContext object | ||
| edgetpu_context_ = edgetpu::EdgeTpuManager::GetSingleton()->OpenDevice(); | ||
| // Add custom edgetpu ops to resolver | ||
| resolver.AddCustom(edgetpu::kCustomOp, edgetpu::RegisterCustomOp()); | ||
| // Build interpreter | ||
| TfLiteStatus status = tflite::InterpreterBuilder(*model, resolver)(&interpreter_); | ||
| CHECK_TFLITE_STATUS(status) << "Failed to build interpreter."; | ||
| // Bind EdgeTPU context with interpreter. | ||
| interpreter_->SetExternalContext(kTfLiteEdgeTpuContext, edgetpu_context_.get()); | ||
| interpreter_->SetNumThreads(1); | ||
| // Allocate tensors | ||
| status = interpreter_->AllocateTensors(); | ||
| CHECK_TFLITE_STATUS(status) << "Failed to allocate tensors."; | ||
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| ctx_ = ctx; | ||
| } | ||
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| Module EdgeTPURuntimeCreate(const std::string& tflite_model_bytes, | ||
| TVMContext ctx) { | ||
| auto exec = make_object<EdgeTPURuntime>(); | ||
| exec->Init(tflite_model_bytes, ctx); | ||
| return Module(exec); | ||
| } | ||
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| TVM_REGISTER_GLOBAL("tvm.edgetpu_runtime.create") | ||
| .set_body([](TVMArgs args, TVMRetValue* rv) { | ||
| *rv = EdgeTPURuntimeCreate(args[0], args[1]); | ||
| }); | ||
| } // namespace runtime | ||
| } // namespace tvm |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,66 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
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| /*! | ||
| * \brief EdgeTPU runtime that can run tflite model compiled | ||
| * for EdgeTPU containing only tvm PackedFunc. | ||
| * \file edgetpu_runtime.h | ||
| */ | ||
| #ifndef TVM_RUNTIME_CONTRIB_EDGETPU_EDGETPU_RUNTIME_H_ | ||
| #define TVM_RUNTIME_CONTRIB_EDGETPU_EDGETPU_RUNTIME_H_ | ||
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| #include <string> | ||
| #include <memory> | ||
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| #include "../tflite/tflite_runtime.h" | ||
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| namespace tvm { | ||
| namespace runtime { | ||
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| /*! | ||
| * \brief EdgeTPU runtime. | ||
| * | ||
| * This runtime can be accessed in various languages via | ||
| * the TVM runtime PackedFunc API. | ||
| */ | ||
| class EdgeTPURuntime : public TFLiteRuntime { | ||
| public: | ||
| /*! | ||
| * \return The type key of the executor. | ||
| */ | ||
| const char* type_key() const final { | ||
| return "EdgeTPURuntime"; | ||
| } | ||
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| /*! | ||
| * \brief Initialize the edge TPU tflite runtime with tflite model and context. | ||
| * \param tflite_model_bytes The tflite model. | ||
| * \param ctx The context where the tflite model will be executed on. | ||
| */ | ||
| void Init(const std::string& tflite_model_bytes, | ||
| TVMContext ctx); | ||
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| private: | ||
| std::shared_ptr<edgetpu::EdgeTpuContext> edgetpu_context_; | ||
| }; | ||
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| } // namespace runtime | ||
| } // namespace tvm | ||
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| #endif // TVM_RUNTIME_CONTRIB_EDGETPU_EDGETPU_RUNTIME_H_ |
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