public async void ProcessCurrentVideoFrame(ThreadPoolTimer timer)
{
if (!_frameProcessingSemaphore.Wait(0))
{
return;
}
var latestFrame = await _camera.GetLatestFrame();
SoftwareBitmap currentFrame = latestFrame as SoftwareBitmap;
// Use FaceDetector.GetSupportedBitmapPixelFormats and IsBitmapPixelFormatSupported to dynamically
// determine supported formats
const BitmapPixelFormat faceDetectionPixelFormat = BitmapPixelFormat.Nv12;
if (currentFrame == null || currentFrame.BitmapPixelFormat != faceDetectionPixelFormat)
{
_frameProcessingSemaphore.Release();
return;
}
try
{
IList <DetectedFace> detectedFaces = await _faceDetector.DetectFacesAsync(currentFrame);
if (detectedFaces.Count == 0)
{
NoFaceDetected?.Invoke(this, null);
}
else if (detectedFaces.Count != _detectedFacesInLastFrame)
{
OnPreAnalysis?.Invoke(this, null);
var bytes = await _camera.GetEncodedBytesAsync(currentFrame);
var output = await AnalysisFunction(bytes);// currentFrame.SoftwareBitmap.ToByteArray());
UsersIdentified?.Invoke(this, output);
}
_detectedFacesInLastFrame = detectedFaces.Count;
}
catch (Exception ex)
{
// Face tracking failed
Debug.WriteLine(ex);
}
finally
{
_frameProcessingSemaphore.Release();
}
currentFrame.Dispose();
}
public async void ProcessCurrentVideoFrame(Timer timer)
{
OnPreAnalysis?.Invoke(this, null);
var p = await Package.Current.InstalledLocation.GetFolderAsync(@"Assets");
var uri = p.Path + "/untitled.png";
var array = File.ReadAllBytes(uri);
var output = await AnalysisFunction(array);
UsersIdentified?.Invoke(this, output);
}