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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 FeatureView.h
* @brief This file contains FeatureView class
* @ingroup COM_AI_RUNTIME
*/
#ifndef __NNFW_TFLITE_FEATURE_VIEW_H__
#define __NNFW_TFLITE_FEATURE_VIEW_H__
#include "tensorflow/lite/interpreter.h"
#include "tflite/InputIndex.h"
#include "tflite/OutputIndex.h"
#include "misc/feature/Shape.h"
#include "misc/feature/Reader.h"
namespace nnfw
{
namespace tflite
{
template <typename T> class FeatureView;
/**
* @brief Class to support reading element of float type feature
*/
template <> class FeatureView<float> : public nnfw::misc::feature::Reader<float>
{
public:
/**
* @brief Construct a new FeatureView object
* @param[in] interp Interpreter to read from
* @param[in] index InputIndex index of input
*/
FeatureView(::tflite::Interpreter &interp, const InputIndex &index);
/**
* @brief Construct a new FeatureView object
* @param[in] interp Interpreter to read from
* @param[in] index OutputIndex index of output
*/
FeatureView(::tflite::Interpreter &interp, const OutputIndex &index);
public:
/**
* @brief Get value of element using channel, row and column index
* @param[in] ch Channel index
* @param[in] row Row index
* @param[in] col Column index
* @return Value of element
*/
float at(uint32_t ch, uint32_t row, uint32_t col) const;
/**
* @brief Get reference of element using channel, row and column index
* @param[in] ch Channel index
* @param[in] row Row index
* @param[in] col Column index
* @return Reference of element
*/
float &at(uint32_t ch, uint32_t row, uint32_t col);
float at(uint32_t batch, uint32_t ch, uint32_t row, uint32_t col) const = 0;
private:
/**
* @brief Get offset of element from channel, row and column index
* @param[in] ch Channel index
* @param[in] row Row index
* @param[in] col Column index
* @return Offset of element
*/
uint32_t getElementOffset(uint32_t ch, uint32_t row, uint32_t col) const
{
uint32_t res = 0;
// TensorFlow Lite assumes that NHWC ordering for tessor
res += row * _shape.W * _shape.C;
res += col * _shape.C;
res += ch;
return res;
}
private:
nnfw::misc::feature::Shape _shape;
float *_base;
};
} // namespace tflite
} // namespace nnfw
#endif // __NNFW_TFLITE_FEATURE_VIEW_H__
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