119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
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/*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_REDUCE_TO_ROW_DETAIL_HPP
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#define OPENCV_CUDEV_GRID_REDUCE_TO_ROW_DETAIL_HPP
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#include "../../common.hpp"
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#include "../../util/saturate_cast.hpp"
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#include "../../block/reduce.hpp"
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namespace cv { namespace cudev {
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namespace grid_reduce_to_vec_detail
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{
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template <class Reductor, int BLOCK_SIZE_X, int BLOCK_SIZE_Y, class SrcPtr, typename ResType, class MaskPtr>
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__global__ void reduceToRow(const SrcPtr src, ResType* dst, const MaskPtr mask, const int rows, const int cols)
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{
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typedef typename Reductor::work_type work_type;
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__shared__ work_type smem[BLOCK_SIZE_X * BLOCK_SIZE_Y];
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const int x = blockIdx.x * BLOCK_SIZE_X + threadIdx.x;
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work_type myVal = Reductor::initialValue();
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Reductor op;
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if (x < cols)
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{
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for (int y = threadIdx.y; y < rows; y += BLOCK_SIZE_Y)
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{
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if (mask(y, x))
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{
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myVal = op(myVal, saturate_cast<work_type>(src(y, x)));
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}
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}
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}
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smem[threadIdx.x * BLOCK_SIZE_Y + threadIdx.y] = myVal;
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__syncthreads();
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volatile work_type* srow = smem + threadIdx.y * BLOCK_SIZE_X;
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myVal = srow[threadIdx.x];
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blockReduce<BLOCK_SIZE_X>(srow, myVal, threadIdx.x, op);
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if (threadIdx.x == 0)
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srow[0] = myVal;
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__syncthreads();
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if (threadIdx.y == 0 && x < cols)
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dst[x] = saturate_cast<ResType>(Reductor::result(smem[threadIdx.x * BLOCK_SIZE_X], rows));
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}
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template <class Reductor, class SrcPtr, typename ResType, class MaskPtr>
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__host__ void reduceToRow(const SrcPtr& src, ResType* dst, const MaskPtr& mask, int rows, int cols, cudaStream_t stream)
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{
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const int BLOCK_SIZE_X = 16;
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const int BLOCK_SIZE_Y = 16;
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const dim3 block(BLOCK_SIZE_X, BLOCK_SIZE_Y);
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const dim3 grid(divUp(cols, block.x));
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reduceToRow<Reductor, BLOCK_SIZE_X, BLOCK_SIZE_Y><<<grid, block, 0, stream>>>(src, dst, mask, 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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