/*
 * Copyright (c) 2017-2021 Arm Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef ARM_COMPUTE_CL_POOLING_KERNEL_H
#define ARM_COMPUTE_CL_POOLING_KERNEL_H

#include "src/core/common/Macros.h"
#include "src/core/gpu/cl/ClCompileContext.h"
#include "src/core/gpu/cl/IClKernel.h"

namespace arm_compute
{
namespace opencl
{
namespace kernels
{
/** Interface for the pooling layer kernel */
class ClPoolingKernel : public IClKernel
{
public:
    /** Default constructor */
    ClPoolingKernel();
    ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(ClPoolingKernel);

    /** Configure kernel for a given list of arguments
     *
     *
     * @param[in]  compile_context The compile context to be used.
     * @param[in]  src             Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
     * @param[out] dst             Destination tensor info. Data types supported: same as @p src.
     * @param[in]  pool_info       Contains pooling operation information described in @ref PoolingLayerInfo.
     * @param[out] indices         (optional) The indices of the maximal values. Data type supported: U32.
     */
    void configure(const ClCompileContext &compile_context, ITensorInfo *src, ITensorInfo *dst, const PoolingLayerInfo &pool_info, ITensorInfo *indices = nullptr);
    /** Static function to check if given info will lead to a valid configuration of @ref ClPoolingKernel
     *
     * @param[in] src       Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
     * @param[in] dst       Destination tensor info. Data types supported: same as @p src.
     * @param[in] pool_info Contains pooling operation information described in @ref PoolingLayerInfo.
     * @param[in] indices   (optional) The indices of the maximal values. Data type supported: U32.
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *src, const ITensorInfo *dst, const PoolingLayerInfo &pool_info, const ITensorInfo *indices = nullptr);

    // Inherited methods overridden:
    void run_op(ITensorPack &tensors, const Window &window, cl::CommandQueue &queue) override;
    BorderSize border_size() const override;

public:
    PoolingLayerInfo _pool_info;
    DataLayout       _data_layout;
    BorderSize       _border_size;
    unsigned int     _num_elems_processed_per_iteration;
};
} // namespace kernels
} // namespace opencl
} // namespace arm_compute
#endif /*ARM_COMPUTE_CL_POOLING_KERNEL_H */