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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 View.h
* @ingroup COM_AI_RUNTIME
* @brief This file defines internal::nnapi::feature::View class
*/
#ifndef __INTERNAL_NNAPI_FEATURE_VIEW_H__
#define __INTERNAL_NNAPI_FEATURE_VIEW_H__
#include "internal/nnapi/feature/Utils.h"
#include "misc/feature/Reader.h"
namespace internal
{
namespace nnapi
{
namespace feature
{
/**
* @brief Class to access feature's element information using index
*/
template <typename T> class View final : public nnfw::misc::feature::Reader<T>
{
public:
/**
* @brief Construct a new View object
* @param[in] shape Shape of feature
* @param[in] ptr Pointer to feature data
* @param[in] len Size of feature (byte)
* @return
*/
// NOTE The parameter len denotes the number of bytes.
View(const ::nnfw::misc::feature::Shape &shape, T *ptr, size_t len) : _shape{shape}, _ptr{ptr}
{
assert(shape.N * shape.C * shape.H * shape.W * sizeof(T) == len);
}
public:
/**
* @brief Get shape of feature
* @return Shape of feature
*/
const nnfw::misc::feature::Shape &shape(void) const { return _shape; }
public:
/**
* @brief Get value of element in 3D feature 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
*/
T at(uint32_t ch, uint32_t row, uint32_t col) const override
{
uint32_t index = index_of(_shape, ch, row, col);
return _ptr[index];
}
/**
* @brief Get value of element in 4D feature using batch, channel, row and column index
* @param[in] batch Batch index
* @param[in] ch Channel index
* @param[in] row Row index
* @param[in] col Column index
* @return Value of element
*/
T at(uint32_t batch, uint32_t ch, uint32_t row, uint32_t col) const override
{
uint32_t index = index_of(_shape, batch, ch, row, col);
return _ptr[index];
}
/**
* @brief Get reference of element in 3D feature 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
*/
T &at(uint32_t ch, uint32_t row, uint32_t col)
{
uint32_t index = index_of(_shape, ch, row, col);
return _ptr[index];
}
/**
* @brief Get reference of element in 4D feature using batch, channel, row and column index
* @param[in] batch Batch index
* @param[in] ch Channel index
* @param[in] row Row index
* @param[in] col Column index
* @return Reference of element
*/
T &at(uint32_t batch, uint32_t ch, uint32_t row, uint32_t col)
{
uint32_t index = index_of(_shape, batch, ch, row, col);
return _ptr[index];
}
private:
nnfw::misc::feature::Shape _shape;
private:
T *_ptr;
};
} // namespace feature
} // namespace nnapi
} // namespace internal
#endif // __INTERNAL_NNAPI_FEATURE_VIEW_H__
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