utils/torch_utils/ops/upfirdn2d.h

/*
 * SPDX-FileCopyrightText: Copyright (c) 2021-2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: LicenseRef-NvidiaProprietary
 *
 * NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
 * property and proprietary rights in and to this material, related
 * documentation and any modifications thereto. Any use, reproduction,
 * disclosure or distribution of this material and related documentation
 * without an express license agreement from NVIDIA CORPORATION or
 * its affiliates is strictly prohibited.
 */

#include <cuda_runtime.h>

//------------------------------------------------------------------------
// CUDA kernel parameters.

struct upfirdn2d_kernel_params
{
    const void*     x;
    const float*    f;
    void*           y;

    int2            up;
    int2            down;
    int2            pad0;
    int             flip;
    float           gain;

    int4            inSize;         // [width, height, channel, batch]
    int4            inStride;
    int2            filterSize;     // [width, height]
    int2            filterStride;
    int4            outSize;        // [width, height, channel, batch]
    int4            outStride;
    int             sizeMinor;
    int             sizeMajor;

    int             loopMinor;
    int             loopMajor;
    int             loopX;
    int             launchMinor;
    int             launchMajor;
};

//------------------------------------------------------------------------
// CUDA kernel specialization.

struct upfirdn2d_kernel_spec
{
    void*   kernel;
    int     tileOutW;
    int     tileOutH;
    int     loopMinor;
    int     loopX;
};

//------------------------------------------------------------------------
// CUDA kernel selection.

template <class T> upfirdn2d_kernel_spec choose_upfirdn2d_kernel(const upfirdn2d_kernel_params& p);

//------------------------------------------------------------------------