/*
 * 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_DIRECT_CONVOLUTION_KERNEL_H
#define ARM_COMPUTE_CL_DIRECT_CONVOLUTION_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  direct convolution kernel.
 */
class ClDirectConvolutionKernel : public IClKernel
{
public:
    ClDirectConvolutionKernel() = default;
    ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(ClDirectConvolutionKernel);
    /** Set the src, weights, biases and dst tensors info.
     *
     * @note: Due to set_valid_region(), thus src/weights/biases cannot be const. Need to change this once the set_valid_region() is removed.
     *
     * @note: DirectConvolution only works in the following configurations:
     *        1x1 convolution with stride_x = 1/2/3, stride_y = 1/2/3
     *        3x3 convolution with stride_x = 1/2, stride_y = 1/2
     *        5x5 convolution with stride_x = 1/2, stride_y = 1/2
     *        9x9 convolution with stride_x = 1/2, stride_y = 1/2
     *
     * @param[in]  compile_context The compile context to be used.
     * @param[in]  src             The src tensor info to convolve. 3 lower dimensions represent a single src [width, height, IFM],
     *                             while every optional dimension from 4 and above represent a batch of inputs. Data types supported: QASYMM8_SIGNED/QASYMM8/F16/F32.
     * @param[in]  weights         Weights tensor info. Weights are 4D tensor with dimensions [kernel_x, kernel_y, IFM, OFM].
     *                             The 3rd dimension must be the same as the src's volume 3rd dimension.
     *                             Data type supported:Same as @p src.
     * @param[in]  biases          Biases tensor info. Biases are 1D tensor with dimension [OFM].
     *                             Data type supported: Should match @p src data type, except for src of QASYMM8 and QASYMM8_SIGNED type where biases should be of S32 type
     * @param[out] dst             Output tensor info.
     *                             The 3rd dimensions must be equal to the 4th dimension of the @p kernels tensor. Data types supported: Same as @p src.
     * @param[in]  conv_info       Contains padding and stride information described in @ref PadStrideInfo.
     */
    void configure(const CLCompileContext &compile_context, ITensorInfo *src, ITensorInfo *weights, ITensorInfo *biases, ITensorInfo *dst, const PadStrideInfo &conv_info);
    /** Static function to check if given info will lead to a valid configuration of @ref ClDirectConvolutionKernel
     *
     * @param[in] src       The src tensor info to convolve. 3 lower dimensions represent a single src [width, height, IFM],
     *                      while every optional dimension from 4 and above represent a batch of inputs. Data types supported: QASYMM8_SIGNED/QASYMM8/F16/F32.
     * @param[in] weights   Weights tensor info. Weights are 4D tensor with dimensions [kernel_x, kernel_y, IFM, OFM].
     *                      The 3rd dimension must be the same as the src's volume 3rd dimension.
     *                      Data type supported:Same as @p src.
     * @param[in] biases    Biases tensor info. Biases are 1D tensor with dimension [OFM].
     *                      Data type supported: Should match @p src data type, except for src of QASYMM8 and QASYMM8_SIGNED type where biases should be of S32 type.
     * @param[in] dst       Output tensor info.
     *                      The 3rd dimensions must be equal to the 4th dimension of the @p kernels tensor. Data types supported: Same as @p src.
     * @param[in] conv_info Contains padding and stride information described in @ref PadStrideInfo.
     * @param[in] target    Target GPU architecture.
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *src, const ITensorInfo *weights, const ITensorInfo *biases, const ITensorInfo *dst, const PadStrideInfo &conv_info, const GPUTarget target);

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

public:
    DataLayout    _data_layout{};
    BorderSize    _border_size{};
    PadStrideInfo _conv_info{};
};
} // namespace kernels
} // namespace opencl
} // namespace arm_compute
#endif /*ARM_COMPUTE_CL_DIRECT_CONVOLUTION_KERNEL_H */