#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);
    
    int width = frame.cols+(rand()%2);
    int skip = 0;
    static int offset = 0;
    
    
    
    for(int z = 0; z < frame.rows; ++z) {
        for(int i = 0; i < frame.cols; ++i) {
            cv::Vec3b &pixel = ac::pixelAt(frame, z, i);
            
            int offx = AC_GetFX(frame.cols-1, i, width);
            if(offx >= 0 && offx < frame.cols) {
                cv::Vec3b &cpix = collection.frames[offset].at<cv::Vec3b>(z, offx);
                for(int q = 0; q < 3; ++q) {
                    pixel[q] = ac::wrap_cast((0.5 * pixel[q]) + (0.5 * cpix[q]));
                }
            }
            
        }
        
        if(++skip > 5) {
            skip = 0;
            width = frame.cols+rand()%2;
            if(++offset > (MAX-1)) {
                offset = 0;
            }
        }
    }
    
 
}