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/*
 * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
 * Copyright (c) 2016-2018 ARM Limited.
 *
 * 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      CLCastKernel.h
 * @ingroup   COM_AI_RUNTIME
 * @brief     This file defines CLCastKernel class
 */

#ifndef __ARM_COMPUTE_CLCASTKERNEL_H__
#define __ARM_COMPUTE_CLCASTKERNEL_H__

#include "arm_compute/core/CL/ICLKernel.h"

namespace arm_compute
{
class ICLTensor;

/**
 * @brief Class to define OpenCL kernel for cast operation
 */
class CLCastKernel : public ICLKernel
{
public:
  /**
   * @brief Construct CLCastKernel object
   */
  CLCastKernel();

  /**
   * @brief Prevent instances of this class from being copied (As this class contains pointers)
   */
  CLCastKernel(const CLCastKernel &) = delete;

  /**
   * @brief Prevent instances of this class from being copied (As this class contains pointers)
   */
  CLCastKernel &operator=(const CLCastKernel &) = delete;

  /**
   * @brief Construct CLCastKernel object using default move constructor
   * @param[in] CLCastKernel object to move
   */
  CLCastKernel(CLCastKernel &&) = default;

  /**
   * @brief Allow instances of this class to be moved
   * @param[in] CLCastKernel object to move
   */
  CLCastKernel &operator=(CLCastKernel &&) = default;

  /**
   * @brief Destruct this CLCastKernel object
   */
  ~CLCastKernel() = default;

  /**
   * @brief Initialise the kernel's input and output.
   * @param[in]  input  Input tensor. Data types supported: U8/QASYMM8/S16/S32/F16/F32.
   * @param[in]  output Output tensor. Data types supported: U8/QASYMM8/S16/S32/F16/F32.
   * @return N/A
   */
  void configure(const ICLTensor *input, ICLTensor *output);

  /**
   * @brief Enqueue the OpenCL kernel to process the given window on the passed OpenCL command
   *        queue.
   * @note  The queue is *not* flushed by this method, and therefore the kernel will not have
   *        been executed by the time this method returns.
   * @param[in] window      Region on which to execute the kernel. (Must be a valid region of
   *                        the window returned by window()).
   * @param[in,out] queue   Command queue on which to enqueue the kernel.@return N/A
   * @return N/A
   */
  void run(const Window &window, cl::CommandQueue &queue) override;

private:
  const ICLTensor *_input; /**< Source tensor */
  ICLTensor *_output;      /**< Destination tensor */
};
} // namespace arm_compute
#endif /* __ARM_COMPUTE_CLCASTKERNEL_H__ */