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/*
* 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/contrib/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__
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