cut up checker

liveCamKit.cpp

void liveCamKit::setup()
{
	flag_checkCutUp = true;
	lastFrame = 0;
}

void liveCamKit::update()
{
	if (source && source->isFrameNew())
	{
		lastFrame = source->getCurrentFrame();
		ofxCv::copy(*source.get(), img_raw);
		ofxCv::resize(img_raw, img_diff_small);
		ofxCv::absdiff(img_prev_small, img_diff_small, img_diff_small);

		ofxCv::copy(img_raw, img_prev);
		ofxCv::resize(img_prev, img_prev_small);
		
		img_prev.update();
		img_diff_small.update();

		if (flag_checkCutUp) checkCutLastFrame = checkCutUp();//カットされたかどうかのbool
	}
}

bool liveCamKit::checkCutUp()
{
	if (source)
	{
		cv::Mat mt = ofxCv::meanCols(img_diff_small).clone();
		
		means_total = 0.0;

		for (int i = 0;i < mt.rows;i++)
		{
			for (int j = 0;j < 3;j++)
				means_total += mt.at<cv::Vec3b>(i)[j];
		}
		means_total /= float(mt.rows);
		means_diff = abs(means_total - means_prev);
		means_prev = means_total;
		
		return means_diff > 70;
	}
	else
	{
		return false;
	}
}

void liveCamKit::setVideoSource(ofPtr<ofVideoPlayer> video)
{
	source = video;
	
	ofVec2f scale = ofVec2f(source->getWidth(), source->getHeight());
	ofVec2f small = scale / 3.0;
	
	img_raw.allocate(scale.x, scale.y, OF_IMAGE_COLOR);
	img_prev.allocate(scale.x, scale.y, OF_IMAGE_COLOR);
	
	img_prev_small.allocate(small.x, small.y, OF_IMAGE_COLOR);
	img_diff_small.allocate(small.x, small.y, OF_IMAGE_COLOR);
}

liveCamKit.h

class liveCamKit{
public:
	
	void setup();
	void update();
	
	void setVideoSource(ofPtr<ofVideoPlayer> video);
	bool checkCutUp();
	
	ofPtr<ofVideoPlayer> source;
	
	bool CutLastFrame;
	
	float means_total;
	float means_prev;
	float means_diff;
	
	ofImage img_raw;
	ofImage	img_prev;
	
	ofImage img_prev_small;
	ofImage img_diff_small;
};