#include"ac.h"

extern "C" void filter(cv::Mat  &frame) {
    static constexpr int MAX = 16;
    static ac::MatrixCollection<MAX> collection;
    collection.shiftFrames(frame);
    static int off = 0;
    static int array[] = { 1, 2, 2, 3, 3, 3 };
    static int array_off = 0;
    static int dir = 0;
    for(int z = 0; z < frame.rows; ++z) {
        for(int i = 0; i < frame.cols; ++i) {
            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(dir == 0) {
                off += array[array_off];
                if(off > MAX - 1) {
                    off = MAX-1;
                    dir = 1;
                }
            } else {
                off -= array[array_off];
                if(off <= 1) {
                    off = 1;
                    dir = 0;
                }
            }
        }
    }
    static int dir1 = 0;
    if(dir1 == 0) {
        array_off++;
        if(array_off > 5) {
            array_off = 5;
            dir1 = 1;
        }
    } else {
        array_off--;
        if(array_off <= 0) {
            array_off = 0;
            dir1 = 0;
        }
    }
}