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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 Reader.h
* @ingroup COM_AI_RUNTIME
* @brief This file defines internal::nnapi::kernel::Reader class
*/
#ifndef __INTERNAL_NNAPI_KERNEL_READER_H__
#define __INTERNAL_NNAPI_KERNEL_READER_H__
#include "misc/kernel/Shape.h"
#include "misc/kernel/Reader.h"
namespace internal
{
namespace nnapi
{
namespace kernel
{
/**
* @brief Class to support reading element in kernel
*/
template <typename T> class Reader final : public nnfw::misc::kernel::Reader<T>
{
public:
/**
* @brief Construct a new Reader object
* @param[in] shape Shape of kernel
* @param[in] ptr Pointer to kernel data
* @param[in] len Size of kernel (byte)
*/
// NOTE The parameter len denotes the number of bytes.
Reader(const ::nnfw::misc::kernel::Shape &shape, const 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 kernel
* @return Shape of kernel
*/
const nnfw::misc::kernel::Shape &shape(void) const { return _shape; }
public:
/**
* @brief Get value of element for kernel
* @param[in] nth Kernel index
* @param[in] ch Channel index
* @param[in] row Row index
* @param[in] col Column index
* @return Value of element
*/
T at(uint32_t nth, uint32_t ch, uint32_t row, uint32_t col) const override
{
// NNAPI uses NHWC ordering
uint32_t index = 0;
index += nth * _shape.H * _shape.W * _shape.C;
index += row * _shape.W * _shape.C;
index += col * _shape.C;
index += ch;
return _ptr[index];
}
private:
nnfw::misc::kernel::Shape _shape;
private:
const T *_ptr;
};
} // namespace kernel
} // namespace nnapi
} // namespace internal
#endif // __INTERNAL_NNAPI_KERNEL_READER_H__
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