#include <opencv2/core.hpp>
#include <opencv2/videoio.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/highgui.hpp>

#include <iostream>

using namespace cv;
using namespace std;

int main()
{
    const int fourcc = cv::VideoWriter::fourcc('M', 'J', 'P', 'G');
    const Size size(1600, 1200);
    VideoCapture cap;

    cv::TickMeter tm;

    {
        tm.start();
        std::vector<int> params;
        params.push_back(cv::CAP_PROP_FRAME_WIDTH);
        params.push_back(size.width);
        params.push_back(cv::CAP_PROP_FRAME_HEIGHT);
        params.push_back(size.height);
        params.push_back(cv::CAP_PROP_FOURCC);
        params.push_back(fourcc);
        cap.open(0, cv::CAP_DSHOW, params);
        bool ret = cap.isOpened();
        if (!ret)
            return -1;
        tm.stop();
        cout << "Open time: " << tm.getLastTimeMilli() << " ms" << endl;
    }

    {
        tm.start();
        const double fps = cap.get(cv::CAP_PROP_FPS);
        const int w = cap.get(cv::CAP_PROP_FRAME_WIDTH);
        const int h = cap.get(cv::CAP_PROP_FRAME_HEIGHT);
        const int actual_fourcc = cap.get(cv::CAP_PROP_FOURCC);
        tm.stop();
        std::cout << "FPS: " << fps << " w:" << w << " h:" << h << std::endl;
        printf("Actual   : 0x%x\n", actual_fourcc);
        printf("Requested: 0x%x\n", fourcc);
    }

    {
        tm.start();
        cv::Mat frame;
        cap.read(frame);
        tm.stop();
        cout << "Frame: " << frame.size() << " x " << frame.channels()
            << " in " << tm.getLastTimeMilli() << " ms" << std::endl;
    }

    cout << "Total: " << tm.getTimeMilli() << " ms" << endl;



    return 0;
}