/// <summary>
/// Initialize access to the camera hardware
/// </summary>
public Cam()
{
// Event used to wait for completion of camera tasks
_finished = new EventWaitHandle(false, EventResetMode.ManualReset);
// Find the integrated camera device
var coll = new FilterInfoCollection(FilterCategory.VideoInputDevice);
if (!coll.Any(fi => fi.MonikerString.StartsWith(@"@device:pnp:\\?\usb#vid_5986&pid_2115")))
{
throw new Exception("Integrated Camera device not found");
}
_vdev = new VideoCaptureDevice(coll.First(fi => fi.MonikerString.StartsWith(@"@device:pnp:\\?\usb#vid_5986&pid_2115")).MonikerString);
// Initial settings and hook handlers
_vdev.VideoResolution = _vdev.VideoCapabilities.First(sn => sn.FrameSize == new System.Drawing.Size(320, 240));
_vdev.PlayingFinished += (sender, e) => _finished.Set();
_vdev.NewFrame += (sender, e) =>
{
int o_exp = -3;
CameraControlFlags o_flag = CameraControlFlags.Auto;
if (_cnt == 0)
{
// 1st frame, camera is open and working. Change settings to fixed constants.
_vdev.GetCameraProperty(CameraControlProperty.Exposure, out o_exp, out o_flag);
_vdev.SetCameraProperty(CameraControlProperty.Exposure, -3, CameraControlFlags.Manual);
}
if (_cnt == 4)
{
// 5th frame, keep this frame. Revert camera settings. Signal to stop querying for frames.
_img = e.Frame.Clone(new System.Drawing.Rectangle(0, 0, e.Frame.Width, e.Frame.Height), System.Drawing.Imaging.PixelFormat.DontCare);
_vdev.SetCameraProperty(CameraControlProperty.Exposure, o_exp, o_flag);
_vdev.SignalToStop();
}
_cnt++;
};
}
