/// <summary>
/// Start previewing from the camera
/// </summary>
private void StartPreview()
{
Debug.WriteLine("StartPreview");
_selectedMediaFrameSource = _mediaCapture.FrameSources.FirstOrDefault(source => source.Value.Info.MediaStreamType == MediaStreamType.VideoPreview &&
source.Value.Info.SourceKind == MediaFrameSourceKind.Color).Value;
if (_selectedMediaFrameSource == null)
{
_selectedMediaFrameSource = _mediaCapture.FrameSources.FirstOrDefault(source => source.Value.Info.MediaStreamType == MediaStreamType.VideoRecord &&
source.Value.Info.SourceKind == MediaFrameSourceKind.Color).Value;
}
// if no preview stream are available, bail
if (_selectedMediaFrameSource == null)
{
return;
}
_mediaPlayer = new MediaPlayer();
_mediaPlayer.RealTimePlayback = true;
_mediaPlayer.AutoPlay = true;
_mediaPlayer.Source = MediaSource.CreateFromMediaFrameSource(_selectedMediaFrameSource);
UIMediaPlayerElement.SetMediaPlayer(_mediaPlayer);
UITxtBlockPreviewProperties.Text = string.Format("{0}x{1}@{2}, {3}",
_selectedMediaFrameSource.CurrentFormat.VideoFormat.Width,
_selectedMediaFrameSource.CurrentFormat.VideoFormat.Height,
_selectedMediaFrameSource.CurrentFormat.FrameRate.Numerator + "/" + _selectedMediaFrameSource.CurrentFormat.FrameRate.Denominator,
_selectedMediaFrameSource.CurrentFormat.Subtype);
UICameraSelectionControls.Visibility = Visibility.Visible;
UIMediaPlayerElement.Visibility = Visibility.Visible;
UIResultImage.Width = UIMediaPlayerElement.Width;
UIResultImage.Height = UIMediaPlayerElement.Height;
}
/// <summary>
/// Initialize the view of the virtual camera and configure available interactions
/// </summary>
/// <returns></returns>
public async Task InitializeAsync()
{
m_mediaCapture = new MediaCapture();
m_mediaPlayer = new MediaPlayer();
// We initialize the MediaCapture instance with the virtual camera in sharing mode
// to preview its stream without blocking other app from using it
var initSettings = new MediaCaptureInitializationSettings()
{
SharingMode = MediaCaptureSharingMode.SharedReadOnly,
VideoDeviceId = VirtualCameraProxyInst.SymbolicLink,
StreamingCaptureMode = StreamingCaptureMode.Video
};
await m_mediaCapture.InitializeAsync(initSettings);
// Retrieve the source associated with the video preview stream.
// On 1-pin camera, this may be the VideoRecord MediaStreamType as opposed to VideoPreview on multi-pin camera
var frameSource = m_mediaCapture.FrameSources.FirstOrDefault(source => source.Value.Info.MediaStreamType == MediaStreamType.VideoPreview &&
source.Value.Info.SourceKind == MediaFrameSourceKind.Color).Value;
if (frameSource == null)
{
frameSource = m_mediaCapture.FrameSources.FirstOrDefault(source => source.Value.Info.MediaStreamType == MediaStreamType.VideoRecord &&
source.Value.Info.SourceKind == MediaFrameSourceKind.Color).Value;
}
// if no preview stream is available, bail
if (frameSource == null)
{
return;
}
// Setup MediaPlayer with the preview source
m_mediaPlayer.RealTimePlayback = true;
m_mediaPlayer.AutoPlay = true;
m_mediaPlayer.Source = MediaSource.CreateFromMediaFrameSource(frameSource);
UIMediaPlayerElement.SetMediaPlayer(m_mediaPlayer);
// Query support of custom and standard KSProperty and update UI toggle buttons accordingly
bool isColorModeSupported = (null != CameraKsPropertyInquiry.GetCustomControl(CustomControlKind.ColorMode, m_mediaCapture.VideoDeviceController));
bool isEyeGazeCorrectionSupported = (null != CameraKsPropertyInquiry.GetExtendedControl(ExtendedControlKind.EyeGazeCorrection, m_mediaCapture.VideoDeviceController));
UIColorModeControlButton.IsEnabled = isColorModeSupported;
UIEyeGazeControlButton.IsEnabled = isEyeGazeCorrectionSupported;
}
