private void ConfigCameraDevice(CameraDeviceSettings newSettings, bool creating)
    {
        if (!creating && (newSettings.cameraId != cameraDeviceSettings.cameraId ||
                          newSettings.videoImageSize != cameraDeviceSettings.videoImageSize))
        {
            cameraDeviceSettings = newSettings;
            if (enabled_)
            {
                DoDisable();
                DoEnable();
            }
        }
        else
        {
            if (creating || newSettings.focusMode != cameraDeviceSettings.focusMode)
            {
                var modes    = new smartar.FocusMode[32];
                var numModes = cameraDevice_.GetSupportedFocusMode(modes);
                modes = new ArraySegment <smartar.FocusMode>(modes, 0, numModes).Array;
                if (((System.Collections.Generic.IList <smartar.FocusMode>)modes).Contains(newSettings.focusMode))
                {
                    cameraDevice_.SetFocusMode(newSettings.focusMode);
                }
            }

            cameraDeviceSettings = newSettings;
        }
    }