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Diffstat (limited to 'runtimes/libs/tflite/include/tflite/TensorView.h')
-rw-r--r-- | runtimes/libs/tflite/include/tflite/TensorView.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/runtimes/libs/tflite/include/tflite/TensorView.h b/runtimes/libs/tflite/include/tflite/TensorView.h new file mode 100644 index 000000000..ce791a73f --- /dev/null +++ b/runtimes/libs/tflite/include/tflite/TensorView.h @@ -0,0 +1,120 @@ +/* + * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved + * + * Licensed 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. + */ + +/** + * @file TensorView.h + * @brief This file contains TensorView class + * @ingroup COM_AI_RUNTIME + */ + +#ifndef __NNFW_TFLITE_TENSOR_VIEW_H__ +#define __NNFW_TFLITE_TENSOR_VIEW_H__ + +#include "tensorflow/lite/interpreter.h" + +#include "misc/tensor/Shape.h" +#include "misc/tensor/Index.h" +#include "misc/tensor/Reader.h" +#include "misc/tensor/NonIncreasingStride.h" + +namespace nnfw +{ +namespace tflite +{ + +/** + * @brief Class to define TensorView which is inherited from nnfw::misc::tensor::Reader<T> class + */ +template <typename T> class TensorView final : public nnfw::misc::tensor::Reader<T> +{ +public: + /** + * @brief Construct a TensorView object with base and shape informations + * @param[in] shape The shape of a tensor + * @param[in] base The base address of a tensor + */ + TensorView(const nnfw::misc::tensor::Shape &shape, T *base) : _shape{shape}, _base{base} + { + // Set 'stride' + _stride.init(_shape); + } + +public: + /** + * @brief Get shape of tensor + * @return Reference of shape + */ + const nnfw::misc::tensor::Shape &shape(void) const { return _shape; } + +public: + /** + * @brief Get value of tensor index + * @param[in] index The tensor index + * @return The value at the index + */ + T at(const nnfw::misc::tensor::Index &index) const override + { + const auto offset = _stride.offset(index); + return *(_base + offset); + } + +public: + /** + * @brief Get reference value of tensor index + * @param[in] index The tensor index + * @return The reference value at the index + */ + T &at(const nnfw::misc::tensor::Index &index) + { + const auto offset = _stride.offset(index); + return *(_base + offset); + } + +private: + nnfw::misc::tensor::Shape _shape; /**< The tensor shape */ + +public: + T *_base; /**< The base address of tensor */ + nnfw::misc::tensor::NonIncreasingStride _stride; /**< The NonIncreasingStride object */ + +public: + // TODO Introduce Operand ID class + /** + * @brief Create TensorView object using given parameters + * @param[in] interp The TfLite interpreter + * @param[in] tensor_index The tensor index + * @return The new TensorView<T> object + */ + static TensorView<T> make(::tflite::Interpreter &interp, int tensor_index) + { + auto tensor_ptr = interp.tensor(tensor_index); + + // Set 'shape' + nnfw::misc::tensor::Shape shape(tensor_ptr->dims->size); + + for (uint32_t axis = 0; axis < shape.rank(); ++axis) + { + shape.dim(axis) = tensor_ptr->dims->data[axis]; + } + + return TensorView<T>(shape, interp.typed_tensor<T>(tensor_index)); + } +}; + +} // namespace tflite +} // namespace nnfw + +#endif // __NNFW_TFLITE_TENSOR_VIEW_H__ |