#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>                 /* exit() */
#include <sys/ioctl.h>              /* ioctl() */
#include <libv4lconvert.h>
#include <iostream>
#include "WebcamTracker.h"
using namespace std;

int main(int argc, char * argv[])
{
    WebcamTracker("/dev/video0");
}

WebcamTracker::WebcamTracker(const char * device)
{
    m_open = false;
    m_fd = open(device, O_RDWR);
    if (m_fd >= 0)
    {
        m_open = true;

        struct v4l2_capability cap;
        ioctl(m_fd, VIDIOC_QUERYCAP, &cap);
#define check_cap(x) do { \
    if (cap.capabilities & (x)) \
        cout << " cap: " << #x << endl; \
    } while (0)
        check_cap(V4L2_CAP_VIDEO_CAPTURE);
        check_cap(V4L2_CAP_VIDEO_OUTPUT);
        check_cap(V4L2_CAP_VIDEO_OVERLAY);
        check_cap(V4L2_CAP_VBI_CAPTURE);
        check_cap(V4L2_CAP_VBI_OUTPUT);
        check_cap(V4L2_CAP_SLICED_VBI_CAPTURE);
        check_cap(V4L2_CAP_SLICED_VBI_OUTPUT);
        check_cap(V4L2_CAP_RDS_CAPTURE);
        check_cap(V4L2_CAP_VIDEO_OUTPUT_OVERLAY);
        check_cap(V4L2_CAP_TUNER);
        check_cap(V4L2_CAP_AUDIO);
        check_cap(V4L2_CAP_RADIO);
        check_cap(V4L2_CAP_READWRITE);
        check_cap(V4L2_CAP_ASYNCIO);
        check_cap(V4L2_CAP_STREAMING);
    }
    else
    {
        cerr << "Could not open device '" << device << "'" << endl;
    }
}

WebcamTracker::~WebcamTracker()
{
    if (m_open)
    {
        close(m_fd);
    }
}