/*
 * Copyright (c) 2017-2018 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_NEDEPTHWISECONVOLUTION_H__
#define __ARM_COMPUTE_NEDEPTHWISECONVOLUTION_H__

#include "arm_compute/core/NEON/kernels/NEDepthwiseConvolutionLayer3x3Kernel.h"
#include "arm_compute/core/NEON/kernels/NEDepthwiseIm2ColKernel.h"
#include "arm_compute/core/NEON/kernels/NEDepthwiseVectorToTensorKernel.h"
#include "arm_compute/core/NEON/kernels/NEDepthwiseWeightsReshapeKernel.h"
#include "arm_compute/core/NEON/kernels/NEDirectConvolutionLayerOutputStageKernel.h"
#include "arm_compute/core/NEON/kernels/NEFillBorderKernel.h"
#include "arm_compute/core/NEON/kernels/NEGEMMMatrixVectorMultiplyKernel.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/runtime/IFunction.h"
#include "arm_compute/runtime/IMemoryManager.h"
#include "arm_compute/runtime/MemoryGroup.h"
#include "arm_compute/runtime/NEON/functions/NEPermute.h"
#include "arm_compute/runtime/Tensor.h"

namespace arm_compute
{
class ITensor;

/** Basic function to execute a depthwise convolution for kernel size 3x3xC. This function calls the following NEON kernels:
 *
 * -# @ref NEDepthwiseConvolutionLayer3x3
 * -# @ref NEFillBorderKernel (if pad_x or pad_y > 0)
 *
 */
class NEDepthwiseConvolutionLayer3x3 : public IFunction
{
public:
    /** Default constructor */
    NEDepthwiseConvolutionLayer3x3();
    /** Initialize the function's source, destination, kernels and border_size.
     *
     * @param[in, out] input            Source tensor. Data type supported: QASYMM8/F32. (Written to only for border filling).
     * @param[in]      weights          Weights tensor. These are 3D tensors with shape [3, 3, IFM]. Data type supported: Same as @p input.
     * @param[in]      biases           (Optional) Biases tensor. A 1D tensor with shape [IFM]. Must be nullptr if not needed.
     *                                  Data type supported: Same as @p input.
     * @param[out]     output           Destination tensor. Data type supported: same as @p input.
     * @param[in]      conv_info        Padding and stride information to use for the convolution.
     * @param[in]      depth_multiplier (Optional) Multiplier to apply to the input's depth in order to retrieve the output's depth. Defaults to 1.
     */
    void configure(ITensor *input, const ITensor *weights, const ITensor *biases, ITensor *output, const PadStrideInfo &conv_info, unsigned int depth_multiplier = 1);

    /** Static function to check if given info will lead to a valid configuration of @ref NEDepthwiseConvolutionLayer3x3
     *
     * @param[in] input            Source tensor. Data type supported: QASYMM8/F32. (Written to only for border filling).
     * @param[in] weights          Weights tensor. These are 3D tensors with shape [3, 3, IFM]. Data type supported: Same as @p input.
     * @param[in] biases           (Optional) Biases tensor. A 1D tensor with shape [IFM]. Must be nullptr if not needed.
     *                             Data type supported: Same as @p input.
     * @param[in] output           Destination tensor. Data type supported: same as @p input.
     * @param[in] conv_info        Padding and stride information to use for the convolution.
     * @param[in] depth_multiplier (Optional) Multiplier to apply to the input's depth in order to retrieve the output's depth. Defaults to 1.
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *input, const ITensorInfo *weights, const ITensorInfo *biases, const ITensorInfo *output, const PadStrideInfo &conv_info, unsigned int depth_multiplier = 1);

    // Inherited methods overriden:
    void run() override;

private:
    NEDepthwiseConvolutionLayer3x3Kernel      _dwc_kernel;
    NEDirectConvolutionLayerOutputStageKernel _output_stage_kernel;
    NEFillBorderKernel                        _border_handler;
    NEPermute                                 _permute_input;
    NEPermute                                 _permute_weights;
    NEPermute                                 _permute_output;
    Tensor                                    _accumulator;
    Tensor                                    _input_nhwc;
    Tensor                                    _weights_hwio;
    Tensor                                    _output_nhwc;
    bool                                      _has_bias;
    bool                                      _is_quantized;
    bool                                      _is_optimized;
    bool                                      _are_weights_reshaped;
    bool                                      _is_nchw;
    bool                                      _is_first_run;
};

/** Basic function to execute a generic depthwise convolution. This function calls the following NEON kernels:
 *
 * -# @ref NEDepthwiseIm2ColKernel
 * -# @ref NEDepthwiseWeightsReshapeKernel
 * -# @ref NEGEMMMatrixVectorMultiplyKernel
 * -# @ref NEFillBorderKernel (if pad_x or pad_y > 0)
 *
 */
class NEDepthwiseConvolutionLayer : public IFunction
{
public:
    /** Default constructor */
    NEDepthwiseConvolutionLayer();
    /** Prevent instances of this class from being copied (As this class contains pointers) */
    NEDepthwiseConvolutionLayer(const NEDepthwiseConvolutionLayer &) = delete;
    /** Default move constructor */
    NEDepthwiseConvolutionLayer(NEDepthwiseConvolutionLayer &&) = default;
    /** Prevent instances of this class from being copied (As this class contains pointers) */
    NEDepthwiseConvolutionLayer &operator=(const NEDepthwiseConvolutionLayer &) = delete;
    /** Default move assignment operator */
    NEDepthwiseConvolutionLayer &operator=(NEDepthwiseConvolutionLayer &&) = default;
    /** Initialize the function's source, destination, weights and convolution information.
     *
     * @param[in, out] input            Source tensor. Data type supported: QASYMM8/F32. (Written to only for border filling).
     * @param[out]     output           Destination tensor. Data type supported: same as @p input.
     * @param[in]      weights          Weights tensor. These are 3D tensors with shape [kernel_x, kernel_y, IFM]. Data type supported: Same as @p input.
     * @param[in]      biases           (Optional) Biases tensor. A 1D tensor with shape [IFM]. Must be nullptr if not needed.
     *                                  Data type supported: Same as @p input, S32 when input is QASYMM8.
     * @param[in]      conv_info        Padding and stride information to use for the convolution.
     * @param[in]      depth_multiplier (Optional) Multiplier to apply to the input's depth in order to retrieve the output's depth. Defaults to 1.
     */
    void configure(ITensor *input, const ITensor *weights, const ITensor *biases, ITensor *output, const PadStrideInfo &conv_info, unsigned int depth_multiplier = 1);

    /** Static function to check if given info will lead to a valid configuration of @ref NEDepthwiseConvolutionLayer
     *
     * @param[in] input            Source tensor. Data type supported: QASYMM8/F32. (Written to only for border filling).
     * @param[in] output           Destination tensor. Data type supported: same as @p input.
     * @param[in] weights          Weights tensor. These are 3D tensors with shape [kernel_x, kernel_y, IFM]. Data type supported: Same as @p input.
     * @param[in] biases           (Optional) Biases tensor. A 1D tensor with shape [IFM]. Must be nullptr if not needed.
     *                             Data type supported: Same as @p input, S32 when input is QASYMM8.
     * @param[in] conv_info        Padding and stride information to use for the convolution.
     * @param[in] depth_multiplier (Optional) Multiplier to apply to the input's depth in order to retrieve the output's depth. Defaults to 1.
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *input, const ITensorInfo *weights, const ITensorInfo *biases, const ITensorInfo *output, const PadStrideInfo &conv_info, unsigned int depth_multiplier = 1);

    // Inherited methods overriden:
    void run() override;
    void prepare() override;

private:
    NEDepthwiseIm2ColKernel                   _im2col_kernel;
    NEDepthwiseWeightsReshapeKernel           _weights_reshape_kernel;
    NEGEMMMatrixVectorMultiplyKernel          _v2mm_kernel;
    NEDepthwiseVectorToTensorKernel           _vector_to_tensor_kernel;
    NEDirectConvolutionLayerOutputStageKernel _output_stage_kernel;
    NEFillBorderKernel                        _v2mm_input_fill_border;
    NEFillBorderKernel                        _v2mm_weights_fill_border;
    Tensor                                    _input_reshaped;
    Tensor                                    _weights_reshaped;
    Tensor                                    _v2mm_output;
    Tensor                                    _output_reshaped;
    bool                                      _is_prepared;
    bool                                      _is_quantized;
    const ITensor                            *_original_weights;
};
}
#endif /* __ARM_COMPUTE_NEDEPTHWISECONVOLUTION_H__ */