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