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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_HISTOGRAM_DETAIL_HPP
- #define OPENCV_CUDEV_GRID_HISTOGRAM_DETAIL_HPP
- #include "../../common.hpp"
- #include "../../util/atomic.hpp"
- namespace cv { namespace cudev {
- namespace grid_histogram_detail
- {
- template <int BIN_COUNT, int BLOCK_SIZE, class SrcPtr, typename ResType, class MaskPtr>
- __global__ void histogram(const SrcPtr src, ResType* hist, const MaskPtr mask, const int rows, const int cols)
- {
- #if CV_CUDEV_ARCH >= 120
- __shared__ ResType smem[BIN_COUNT];
- const int y = blockIdx.x * blockDim.y + threadIdx.y;
- const int tid = threadIdx.y * blockDim.x + threadIdx.x;
- for (int i = tid; i < BIN_COUNT; i += BLOCK_SIZE)
- smem[i] = 0;
- __syncthreads();
- if (y < rows)
- {
- for (int x = threadIdx.x; x < cols; x += blockDim.x)
- {
- if (mask(y, x))
- {
- const uint data = src(y, x);
- atomicAdd(&smem[data % BIN_COUNT], 1);
- }
- }
- }
- __syncthreads();
- for (int i = tid; i < BIN_COUNT; i += BLOCK_SIZE)
- {
- const ResType histVal = smem[i];
- if (histVal > 0)
- atomicAdd(hist + i, histVal);
- }
- #endif
- }
- template <int BIN_COUNT, class Policy, class SrcPtr, typename ResType, class MaskPtr>
- __host__ void histogram(const SrcPtr& src, ResType* hist, const MaskPtr& mask, int rows, int cols, cudaStream_t stream)
- {
- const dim3 block(Policy::block_size_x, Policy::block_size_y);
- const dim3 grid(divUp(rows, block.y));
- const int BLOCK_SIZE = Policy::block_size_x * Policy::block_size_y;
- histogram<BIN_COUNT, BLOCK_SIZE><<<grid, block, 0, stream>>>(src, hist, mask, rows, cols);
- CV_CUDEV_SAFE_CALL( cudaGetLastError() );
- if (stream == 0)
- CV_CUDEV_SAFE_CALL( cudaDeviceSynchronize() );
- }
- }
- }}
- #endif
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