/*
 * Copyright (c) 2019-2020 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_CLBATCHCONCATENATEKERNEL_H
#define ARM_COMPUTE_CLBATCHCONCATENATEKERNEL_H

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

namespace arm_compute
{
class ICLTensor;

/** Interface for the batch concatenate kernel.
 *  The input tensor will be concatenated into the output tensor.
 */
class CLBatchConcatenateLayerKernel : public ICLKernel
{
public:
    /** Default constructor */
    CLBatchConcatenateLayerKernel();
    /** Prevent instances of this class from being copied (As this class contains pointers) */
    CLBatchConcatenateLayerKernel(const CLBatchConcatenateLayerKernel &) = delete;
    /** Prevent instances of this class from being copied (As this class contains pointers) */
    CLBatchConcatenateLayerKernel &operator=(const CLBatchConcatenateLayerKernel &) = delete;
    /** Allow instances of this class to be moved */
    CLBatchConcatenateLayerKernel(CLBatchConcatenateLayerKernel &&) = default;
    /** Allow instances of this class to be moved */
    CLBatchConcatenateLayerKernel &operator=(CLBatchConcatenateLayerKernel &&) = default;
    /** Default destructor */
    ~CLBatchConcatenateLayerKernel() = default;
    /** Initialise the kernel's inputs and output
     *
     * @param[in]     input        Input tensor. Data types supported: All.
     * @param[in]     batch_offset The offset on axis # 3.
     * @param[in,out] output       Output tensor. Data types supported: Same as @p input.
     *
     * @note: The output tensor's low two dimensions can't be smaller than the input one's.
     * @note: The gaps between the two lowest dimensions of input and output need to be divisible by 2.
     *
     */
    void configure(const ICLTensor *input, unsigned int batch_offset, ICLTensor *output);
    /**  Static function to check if given info will lead to a valid configuration of @ref CLBatchConcatenateLayerKernel
     *
     * @param[in] input        Input tensor info. Data types supported: All.
     * @param[in] batch_offset The offset on axis # 3.
     * @param[in] output       Output tensor info. Data types supported: Same as @p input.
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *input, unsigned int batch_offset, const ITensorInfo *output);

    // Inherited methods overridden:
    void run(const Window &window, cl::CommandQueue &queue) override;

private:
    const ICLTensor *_input;
    ICLTensor       *_output;
    unsigned int     _batch_offset;
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_CLBATCHCONCATENATEKERNEL_H */