/*
 * Copyright (c) 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_H
#define ARM_COMPUTE_CL_POOLING_H

#include "src/core/gpu/cl/ClCompileContext.h"
#include "src/runtime/gpu/cl/IClOperator.h"

#include <memory>

namespace arm_compute
{
namespace opencl
{
/** Basic function to simulate a pooling layer with the specified pooling operation. This function calls the following OpenCL kernels:
 *
 * -# @ref CLFillBorderKernel (executed if padding size is different from zero)
 * -# @ref opencl::ClPooling
 */
class ClPooling : public IClOperator
{
public:
    /** Constructor */
    ClPooling() = default;
    /** Configure operator 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 type supported: same as @p src
     * @param[in]  info            Pooling layer parameters.
     * @param[out] indices         (optional) The indices info of the maximal values. Data type supported: U32.
     */
    void configure(const ClCompileContext &compile_context, ITensorInfo *src, ITensorInfo *dst, const PoolingLayerInfo &info, ITensorInfo *indices = nullptr);
    /** Static function to check if given info will lead to a valid configuration of @ref ClPooling
     *
     * @param[in]  src     Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
     * @param[out] dst     Destination tensor info. Data type supported: same as @p src
     * @param[in]  info    Pooling layer parameters.
     * @param[out] indices (optional) The indices info of the maximal values. Data type supported: U32.
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *src, const ITensorInfo *dst, const PoolingLayerInfo &info, const ITensorInfo *indices = nullptr);

    // Inherited method overridden
    void run(ITensorPack &tensors) override;

private:
    std::unique_ptr<ICLKernel> _pooling{ nullptr };
    std::unique_ptr<ICLKernel> _border_handler{ nullptr };
};
} // namespace opencl
} // namespace arm_compute
#endif /* ARM_COMPUTE_CL_POOLING_H */