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128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#pragma once
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#ifndef __OPENCV_CUDEV_GRID_TRANSPOSE_DETAIL_HPP__
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#define __OPENCV_CUDEV_GRID_TRANSPOSE_DETAIL_HPP__
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#include "../../common.hpp"
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#include "../../util/saturate_cast.hpp"
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#include "../../ptr2d/glob.hpp"
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#include "../../ptr2d/traits.hpp"
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namespace cv { namespace cudev {
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namespace transpose_detail
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{
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template <int TILE_DIM, int BLOCK_DIM_Y, class SrcPtr, typename DstType>
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__global__ void transpose(const SrcPtr src, GlobPtr<DstType> dst, const int rows, const int cols)
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{
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typedef typename PtrTraits<SrcPtr>::value_type src_type;
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__shared__ src_type tile[TILE_DIM][TILE_DIM + 1];
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int blockIdx_x, blockIdx_y;
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// do diagonal reordering
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if (gridDim.x == gridDim.y)
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{
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blockIdx_y = blockIdx.x;
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blockIdx_x = (blockIdx.x + blockIdx.y) % gridDim.x;
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}
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else
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{
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int bid = blockIdx.x + gridDim.x * blockIdx.y;
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blockIdx_y = bid % gridDim.y;
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blockIdx_x = ((bid / gridDim.y) + blockIdx_y) % gridDim.x;
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}
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int xIndex = blockIdx_x * TILE_DIM + threadIdx.x;
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int yIndex = blockIdx_y * TILE_DIM + threadIdx.y;
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if (xIndex < cols)
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{
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for (int i = 0; i < TILE_DIM; i += BLOCK_DIM_Y)
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{
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if (yIndex + i < rows)
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{
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tile[threadIdx.y + i][threadIdx.x] = src(yIndex + i, xIndex);
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}
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}
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}
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__syncthreads();
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xIndex = blockIdx_y * TILE_DIM + threadIdx.x;
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yIndex = blockIdx_x * TILE_DIM + threadIdx.y;
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if (xIndex < rows)
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{
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for (int i = 0; i < TILE_DIM; i += BLOCK_DIM_Y)
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{
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if (yIndex + i < cols)
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{
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dst(yIndex + i, xIndex) = saturate_cast<DstType>(tile[threadIdx.x][threadIdx.y + i]);
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}
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}
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}
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}
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template <class Policy, class SrcPtr, typename DstType>
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__host__ void transpose(const SrcPtr& src, const GlobPtr<DstType>& dst, int rows, int cols, cudaStream_t stream)
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{
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const dim3 block(Policy::tile_dim, Policy::block_dim_y);
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const dim3 grid(divUp(cols, block.x), divUp(rows, block.y));
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transpose<Policy::tile_dim, Policy::block_dim_y><<<grid, block, 0, stream>>>(src, dst, rows, cols);
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CV_CUDEV_SAFE_CALL( cudaGetLastError() );
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if (stream == 0)
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CV_CUDEV_SAFE_CALL( cudaDeviceSynchronize() );
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}
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}
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}}
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#endif
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