#include <windows.h>
#include <vector>
#include <chrono>
#include <numeric>
#include <vfw.h>
#include "avi_utils.h"

#pragma comment(lib, "Vfw32")

int main()
{
    BITMAPINFO bmi;
    std::vector<unsigned long long> times(100);
    HAVI avi = CreateAvi("test.avi", 50, nullptr); // 50ms is the period between frames
    HDC hdcScreen = ::GetDC(HWND_DESKTOP);
    HDC hdcShot = ::CreateCompatibleDC(hdcScreen);
    int cx = GetDeviceCaps(hdcScreen, HORZRES);
    int cy = GetDeviceCaps(hdcScreen, VERTRES);
    void *pBits = nullptr;
    memset(&bmi, 0, sizeof(BITMAPINFO));
    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth = cx;
    bmi.bmiHeader.biHeight = cy;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = 32;
    bmi.bmiHeader.biCompression = BI_RGB;
    HGDIOBJ hbmpShot = CreateDIBSection(hdcScreen, &bmi, DIB_RGB_COLORS, (void**)&pBits, nullptr, 0);
    HGDIOBJ hbmpSys = SelectObject(hdcShot, hbmpShot);
    for( size_t i = times.size(); i--; ) {
        auto start = std::chrono::high_resolution_clock::now();
        ::BitBlt(hdcShot, 0, 0, cx, cy, hdcScreen, 0, 0, SRCCOPY);
        AddAviFrame(avi, (HBITMAP)hbmpShot);
        auto finish = std::chrono::high_resolution_clock::now();
        times[i] = std::chrono::duration_cast<std::chrono::milliseconds>(finish - start).count();
    }
    ::ReleaseDC(HWND_DESKTOP, hdcScreen);
    SelectObject(hdcShot, hbmpSys);
    ::DeleteObject(hbmpShot);
    ::DeleteDC(hdcShot);
    CloseAvi(avi);
    printf("Time: %f\n", double(std::accumulate(times.begin(), times.end(), (unsigned long long)0)) / times.size());
    return 0;
}