public async System.Threading.Tasks.Task StartCapturePreviewAsync()
{
try
{
Windows.Devices.Enumeration.Panel devicePanel = Windows.Devices.Enumeration.Panel.Back;
var obj = Global.Current.LocalSettings.LoadData(conCameraPanel);
if (obj != null && obj.ToString() == conCameraFront)
{
devicePanel = Windows.Devices.Enumeration.Panel.Front;
this.captureElement.FlowDirection = Windows.UI.Xaml.FlowDirection.RightToLeft;
}
else
{
this.captureElement.FlowDirection = Windows.UI.Xaml.FlowDirection.LeftToRight;
}
if ((App.Current as App).mediaCapture == null)
{
await(App.Current as App).InitializeCapture(devicePanel);
}
if ((App.Current as App).isExternalCamera)
{
this.captureElement.FlowDirection = Windows.UI.Xaml.FlowDirection.RightToLeft;
}
Global.Current.LocalSettings.SaveData(conCameraPanel, devicePanel.ToString());
this.mediaCapture = (App.Current as App).mediaCapture;
this.zoomControl = this.mediaCapture.VideoDeviceController.Zoom;
if (this.zoomControl != null && this.zoomControl.Capabilities.Supported)
{
this.zoomSlider.Visibility = Windows.UI.Xaml.Visibility.Visible;
this.zoomSlider.IsEnabled = true;
this.zoomSlider.Maximum = this.zoomControl.Capabilities.Max;
this.zoomSlider.Minimum = this.zoomControl.Capabilities.Min;
this.zoomSlider.StepFrequency = this.zoomControl.Capabilities.Step;
double value;
var rev = this.zoomControl.TryGetValue(out value);
if (rev)
{
this.zoomSlider.Value = value;
}
}
else
{
this.zoomSlider.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
this.AppbarSwitchCamera.Visibility = (App.Current as App).isSupportFront?Visibility.Visible:Visibility.Collapsed;
this.AppbarFlashAuto.Visibility = this.mediaCapture.VideoDeviceController.FlashControl.Supported ? Visibility.Visible : Visibility.Collapsed;
this.captureElement.Source = this.mediaCapture;
await this.mediaCapture.StartPreviewAsync();
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
private void SetDefaults(MediaDeviceControl control, bool useAuto = false)
{
if (control.Capabilities.Supported)
{
if (useAuto)
{
control.TrySetAuto(useAuto);
}
else
{
control.TrySetAuto(useAuto);
control.TrySetValue(control.Capabilities.Default);
}
}
}