private async void ProcessAsync()
{
if (Monitor.TryEnter(ProcessingSyncRoot, TimeSpan.FromMilliseconds(100)))
{
try
{
while (Frames.TryDequeue(out var frame))
{
ProcessingFrames.Add(frame);
}
while (DetectedFaceEpochs.TryDequeue(out var epoch))
{
ProcessingDetectedFaceEpochs.Add(epoch);
}
if (!ProcessingFrames.Any() ||
!ProcessingDetectedFaceEpochs.Any())
{
return;
}
var expiredFaceDetectionEpochs = new List <TimeSpan>();
foreach (var epoch in ProcessingDetectedFaceEpochs)
{
if (MostRecentObservedSystemRelativeTime - epoch > FaceDetectionLatency)
{
expiredFaceDetectionEpochs.Add(epoch);
continue;
}
var framesByCorrelation = ProcessingFrames.GroupBy(frame => (frame.SystemRelativeTime.Value - epoch).Duration() < FrameCorrelationTimeSpan);
ProcessingFrames = framesByCorrelation.Where(g => g.Key == false).SelectMany(g => g).ToList();
var correlatedFrames = framesByCorrelation.Where(g => g.Key == true).SelectMany(g => g);
foreach (var correlatedFrame in correlatedFrames)
{
CollectionProgressed?.Invoke(this, new ExampleMediaFrameCollectionProgressedEventArgs(correlatedFrame));
}
}
foreach (var epoch in expiredFaceDetectionEpochs)
{
ProcessingDetectedFaceEpochs.Remove(epoch);
}
}
finally
{
ProcessingFrames = ProcessingFrames.Where(frame => (frame.SystemRelativeTime.Value - MostRecentObservedSystemRelativeTime).Duration() < FaceDetectionLatency).ToList();
Monitor.Exit(ProcessingSyncRoot);
}
}
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
public void Dispose()
{
DelayedProcessingTrigger.Dispose();
while (Frames.TryDequeue(out var frame))
{
frame.Dispose();
}
while (DetectedFaceEpochs.TryDequeue(out var epoch))
{
}
while (FailureReasons.TryDequeue(out var epoch))
{
}
ProcessingFrames.Clear();
ProcessingDetectedFaceEpochs.Clear();
}