#include"ac.h"

extern "C" void filter(cv::Mat  &frame) {
    static constexpr int MAX = 4;
    static ac::MatrixCollection<MAX> collection;
    if(collection.empty()) {
        collection.shiftFrames(frame);
        srand(static_cast<unsigned int>(time(0)));
    } else if(rand()%10==0)
        collection.shiftFrames(frame);
    static bool on = false;
    static int off = 0;
    static int line_wait = 2+rand()%(frame.rows/2);
    for(int z = 0; z < frame.rows; ++z) {
        for(int i = 0; i < frame.cols; ++i) {
            if(on == false) break;
            cv::Vec3b &pixel = frame.at<cv::Vec3b>(z, i);
            cv::Mat &f = collection.frames[off];
            cv::Vec3b pix = f.at<cv::Vec3b>(z, i);
            pixel = pix;
        }
        if(((z%line_wait)==0) && ++off > MAX-1) {
            off = 0;
            static int cnt = 0;
            static int wait = rand()%60;
            ++cnt;
            if(cnt > wait) {
                on = !on;
                cnt = 0;
                wait = rand()%60;
            }
            line_wait = 2+rand()%(frame.rows/2);
        }
    }
}