#include"ac.h"

extern "C" void filter(cv::Mat  &frame) {
    static constexpr int MAX = 8;
    static ac::MatrixCollection<MAX> collection;
    if(collection.empty()) {
        srand(static_cast<unsigned int>(time(0)));
        collection.shiftFrames(frame);
    }
    else
        collection.shiftFrames(frame);
    
    static int wait = rand()%15;
    static int count = 0;
    static int size_x = 8;
    static int num = 2;
    if(++count > wait) {
        
        count = 0;
        wait = rand()%15;
        
        
        for(int z = 0; z < frame.rows; z += size_x) {
            for(int i = 0; i < frame.cols; i += size_x) {
                cv::Vec3b &pix = collection.frames[6].at<cv::Vec3b>(z, i);
                if(rand()%num == 0) {
                    for(int x = 0; x < size_x && x+i < frame.cols; ++x) {
                        for(int y = 0; y < size_x && y+z < frame.rows; ++y) {
                            cv::Vec3b &pixel = ac::pixelAt(frame, z+y, i+x);
                            for(int q = 0; q < 3; ++q) {
                                pixel[q] = ac::wrap_cast((0.5 * pixel[q]) + (0.5 * pix[q]));
                            }
                        }
                    }
                }
            }
        }
        
    }
    
    static int dir = 1;
    if(dir == 1) {
        if(++size_x >= 32) {
            dir = 0;
        }
    } else {
        if(--size_x <= 8) {
            dir = 1;
        }
    }
}