alexander | 3c79893 | 2021-03-26 21:42:19 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2021 Arm Limited. All rights reserved. |
| 3 | * SPDX-License-Identifier: Apache-2.0 |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | #ifndef MODEL_HPP |
| 18 | #define MODEL_HPP |
| 19 | |
| 20 | #include "TensorFlowLiteMicro.hpp" |
| 21 | #include "BufAttributes.hpp" |
| 22 | |
| 23 | #include <cstdint> |
| 24 | |
| 25 | namespace arm { |
| 26 | namespace app { |
| 27 | |
| 28 | /** |
| 29 | * @brief NN model class wrapping the underlying TensorFlow-Lite-Micro API. |
| 30 | */ |
| 31 | class Model { |
| 32 | public: |
| 33 | /** @brief Constructor. */ |
| 34 | Model(); |
| 35 | |
| 36 | /** @brief Destructor. */ |
| 37 | ~Model(); |
| 38 | |
| 39 | /** @brief Gets the pointer to the model's input tensor at given input index. */ |
| 40 | TfLiteTensor* GetInputTensor(size_t index) const; |
| 41 | |
| 42 | /** @brief Gets the pointer to the model's output tensor at given output index. */ |
| 43 | TfLiteTensor* GetOutputTensor(size_t index) const; |
| 44 | |
| 45 | /** @brief Gets the model's data type. */ |
| 46 | TfLiteType GetType() const; |
| 47 | |
| 48 | /** @brief Gets the pointer to the model's input shape. */ |
| 49 | TfLiteIntArray* GetInputShape(size_t index) const; |
| 50 | |
| 51 | /** @brief Gets the pointer to the model's output shape at given output index. */ |
| 52 | TfLiteIntArray* GetOutputShape(size_t index) const; |
| 53 | |
| 54 | /** @brief Gets the number of input tensors the model has. */ |
| 55 | size_t GetNumInputs() const; |
| 56 | |
| 57 | /** @brief Gets the number of output tensors the model has. */ |
| 58 | size_t GetNumOutputs() const; |
| 59 | |
| 60 | /** @brief Logs the tensor information to stdout. */ |
| 61 | void LogTensorInfo(TfLiteTensor* tensor); |
| 62 | |
| 63 | /** @brief Logs the interpreter information to stdout. */ |
| 64 | void LogInterpreterInfo(); |
| 65 | |
| 66 | /** @brief Initialise the model class object. |
| 67 | * @param[in] allocator Optional: a pre-initialised micro allocator pointer, |
| 68 | * if available. If supplied, this allocator will be used |
| 69 | * to create the interpreter instance. |
| 70 | * @return true if initialisation succeeds, false otherwise. |
| 71 | **/ |
| 72 | bool Init(tflite::MicroAllocator* allocator = nullptr); |
| 73 | |
| 74 | /** |
| 75 | * @brief Gets the allocator pointer for this instance. |
| 76 | * @return Pointer to a tflite::MicroAllocator object, if |
| 77 | * available; nullptr otherwise. |
| 78 | **/ |
| 79 | tflite::MicroAllocator* GetAllocator(); |
| 80 | |
| 81 | /** @brief Checks if this object has been initialised. */ |
| 82 | bool IsInited() const; |
| 83 | |
| 84 | /** @brief Checks if the model uses signed data. */ |
| 85 | bool IsDataSigned() const; |
| 86 | |
alexander | c7050f8 | 2021-05-19 21:48:01 +0100 | [diff] [blame] | 87 | /** @brief Runs the inference (invokes the interpreter). */ |
| 88 | virtual bool RunInference(); |
alexander | 3c79893 | 2021-03-26 21:42:19 +0000 | [diff] [blame] | 89 | |
| 90 | /** @brief Model information handler common to all models. |
| 91 | * @return true or false based on execution success. |
| 92 | **/ |
| 93 | bool ShowModelInfoHandler(); |
| 94 | |
| 95 | /** @brief Gets a pointer to the tensor arena. */ |
| 96 | uint8_t* GetTensorArena(); |
| 97 | |
| 98 | protected: |
| 99 | /** @brief Gets the pointer to the NN model data array. |
| 100 | * @return Pointer of uint8_t type. |
| 101 | **/ |
| 102 | virtual const uint8_t* ModelPointer() = 0; |
| 103 | |
| 104 | /** @brief Gets the model size. |
| 105 | * @return size_t, size in bytes. |
| 106 | **/ |
| 107 | virtual size_t ModelSize() = 0; |
| 108 | |
| 109 | /** |
| 110 | * @brief Gets the op resolver for the model instance. |
| 111 | * @return const reference to a tflite::MicroOpResolver object. |
| 112 | **/ |
| 113 | virtual const tflite::MicroOpResolver& GetOpResolver() = 0; |
| 114 | |
| 115 | /** |
| 116 | * @brief Add all the operators required for the given model. |
| 117 | * Implementation of this should come from the use case. |
| 118 | * @return true is ops are successfully added, false otherwise. |
| 119 | **/ |
| 120 | virtual bool EnlistOperations() = 0; |
| 121 | |
| 122 | /** @brief Gets the total size of tensor arena available for use. */ |
| 123 | size_t GetActivationBufferSize(); |
| 124 | |
| 125 | private: |
Isabella Gottardi | 56ee620 | 2021-05-12 08:27:15 +0100 | [diff] [blame] | 126 | tflite::MicroErrorReporter m_uErrorReporter; /* Error reporter object. */ |
| 127 | tflite::ErrorReporter* m_pErrorReporter = nullptr; /* Pointer to the error reporter. */ |
| 128 | const tflite::Model* m_pModel = nullptr; /* Tflite model pointer. */ |
| 129 | tflite::MicroInterpreter* m_pInterpreter = nullptr; /* Tflite interpreter. */ |
| 130 | tflite::MicroAllocator* m_pAllocator = nullptr; /* Tflite micro allocator. */ |
| 131 | bool m_inited = false; /* Indicates whether this object has been initialised. */ |
alexander | 3c79893 | 2021-03-26 21:42:19 +0000 | [diff] [blame] | 132 | |
Isabella Gottardi | 56ee620 | 2021-05-12 08:27:15 +0100 | [diff] [blame] | 133 | std::vector<TfLiteTensor*> m_input = {}; /* Model's input tensor pointers. */ |
| 134 | std::vector<TfLiteTensor*> m_output = {}; /* Model's output tensor pointers. */ |
| 135 | TfLiteType m_type = kTfLiteNoType;/* Model's data type. */ |
alexander | 3c79893 | 2021-03-26 21:42:19 +0000 | [diff] [blame] | 136 | |
| 137 | }; |
| 138 | |
| 139 | } /* namespace app */ |
| 140 | } /* namespace arm */ |
| 141 | |
| 142 | #endif /* MODEL_HPP */ |