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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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// 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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#include "precomp.hpp"
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#if !defined HAVE_CUDA || defined(CUDA_DISABLER)
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cv::gpu::VIBE_GPU::VIBE_GPU(unsigned long) { throw_nogpu(); }
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void cv::gpu::VIBE_GPU::initialize(const GpuMat&, Stream&) { throw_nogpu(); }
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void cv::gpu::VIBE_GPU::operator()(const GpuMat&, GpuMat&, Stream&) { throw_nogpu(); }
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void cv::gpu::VIBE_GPU::release() {}
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#else
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namespace cv { namespace gpu { namespace device
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{
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namespace vibe
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{
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void loadConstants(int nbSamples, int reqMatches, int radius, int subsamplingFactor);
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void init_gpu(PtrStepSzb frame, int cn, PtrStepSzb samples, PtrStepSz<unsigned int> randStates, cudaStream_t stream);
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void update_gpu(PtrStepSzb frame, int cn, PtrStepSzb fgmask, PtrStepSzb samples, PtrStepSz<unsigned int> randStates, cudaStream_t stream);
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}
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}}}
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namespace
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{
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const int defaultNbSamples = 20;
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const int defaultReqMatches = 2;
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const int defaultRadius = 20;
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const int defaultSubsamplingFactor = 16;
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}
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cv::gpu::VIBE_GPU::VIBE_GPU(unsigned long rngSeed) :
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frameSize_(0, 0), rngSeed_(rngSeed)
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{
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nbSamples = defaultNbSamples;
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reqMatches = defaultReqMatches;
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radius = defaultRadius;
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subsamplingFactor = defaultSubsamplingFactor;
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}
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void cv::gpu::VIBE_GPU::initialize(const GpuMat& firstFrame, Stream& s)
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{
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using namespace cv::gpu::device::vibe;
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CV_Assert(firstFrame.type() == CV_8UC1 || firstFrame.type() == CV_8UC3 || firstFrame.type() == CV_8UC4);
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cudaStream_t stream = StreamAccessor::getStream(s);
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loadConstants(nbSamples, reqMatches, radius, subsamplingFactor);
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frameSize_ = firstFrame.size();
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if (randStates_.size() != frameSize_)
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{
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cv::RNG rng(rngSeed_);
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cv::Mat h_randStates(frameSize_, CV_8UC4);
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rng.fill(h_randStates, cv::RNG::UNIFORM, 0, 255);
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randStates_.upload(h_randStates);
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}
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int ch = firstFrame.channels();
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int sample_ch = ch == 1 ? 1 : 4;
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samples_.create(nbSamples * frameSize_.height, frameSize_.width, CV_8UC(sample_ch));
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init_gpu(firstFrame, ch, samples_, randStates_, stream);
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}
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void cv::gpu::VIBE_GPU::operator()(const GpuMat& frame, GpuMat& fgmask, Stream& s)
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{
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using namespace cv::gpu::device::vibe;
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CV_Assert(frame.depth() == CV_8U);
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int ch = frame.channels();
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int sample_ch = ch == 1 ? 1 : 4;
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if (frame.size() != frameSize_ || sample_ch != samples_.channels())
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initialize(frame);
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fgmask.create(frameSize_, CV_8UC1);
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update_gpu(frame, ch, fgmask, samples_, randStates_, StreamAccessor::getStream(s));
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}
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void cv::gpu::VIBE_GPU::release()
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{
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frameSize_ = Size(0, 0);
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randStates_.release();
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samples_.release();
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}
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#endif
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