internal async Task <ExampleMediaFrameReader> CreateFrameReaderAsync_Impl()
{
MediaFrameReader faceDetectionFrameReader = null;
if (InitializationSettings.FaceDetectionAffinity == ExampleMediaCaptureFaceDetectionAffinity.FrameReader)
{
faceDetectionFrameReader = await PreviewMediaCapture.CreateFrameReaderAsync(PreviewMediaCapture.FrameSources[ExclusiveRgbSourceInfo.Id]);
}
var frameReader = new ExampleMediaFrameReader(
new Dictionary <MediaFrameSourceKind, MediaFrameReader> {
#if USE_INFRARED
{ MediaFrameSourceKind.Infrared, await ExclusiveMediaCapture.CreateFrameReaderAsync(FrameSources[ExclusiveIrSourceInfo.Id]) },
#else
{ MediaFrameSourceKind.Infrared, await PreviewMediaCapture.CreateFrameReaderAsync(PreviewMediaCapture.FrameSources[ExclusiveRgbSourceInfo.Id]) },
#endif
{ MediaFrameSourceKind.Color, await PreviewMediaCapture.CreateFrameReaderAsync(PreviewMediaCapture.FrameSources[ExclusiveRgbSourceInfo.Id]) },
},
faceDetectionFrameReader,
PreviewFaceDetectionEffect,
InitializationSettings.FrameCorrelationTimeSpan);
frameReader.FaceDetected += FrameReader_FaceDetected;
return(frameReader);
}
/// <summary>
/// Handles frame arrive event and sets latest color and infrared frame.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
public void FrameReader_FrameArrived(ExampleMediaFrameReader sender, ExampleMediaFrameArrivedEventArgs args)
{
try
{
using (var mediaFrameReference = sender.TryAcquireLatestFrameBySourceKind(args.SourceKind))
{
{
if (mediaFrameReference != null)
{
if (mediaFrameReference.SourceKind == MediaFrameSourceKind.Color)
{
colorFrame = mediaFrameReference.VideoMediaFrame.SoftwareBitmap;
}
if (mediaFrameReference.SourceKind == MediaFrameSourceKind.Infrared)
{
if (mediaFrameReference.VideoMediaFrame.InfraredMediaFrame.IsIlluminated)
{
irFrame = mediaFrameReference.VideoMediaFrame.SoftwareBitmap;
}
}
}
}
}
}
catch (ObjectDisposedException) { }
finally
{
}
}
/// <summary>
/// Initializes ExampleMediaCapture and FrameReader.
/// Turns camera on and sets camera preview.
/// </summary>
/// <returns></returns>
public async Task InitializeAsync()
{
MediaCapture = new ExampleMediaCapture();
await MediaCapture.InitializeAsync();
CaptureElement.Source = MediaCapture.PreviewMediaCapture;
CaptureElement.FlowDirection = MediaCapture.PreviewFlowDirection;
await MediaCapture.StartPreviewAsync();
FrameReader = await MediaCapture.CreateFrameReaderAsync();
FrameReader.AcquisitionMode = MediaFrameReaderAcquisitionMode.Buffered;
FrameReader.FrameArrived += FrameArrivedEvent;
await FrameReader.StartAsync();
}
private void FrameReader_FrameArrived(ExampleMediaFrameReader sender, ExampleMediaFrameArrivedEventArgs args)
{
try
{
// Access the latest frame
// More information:
// https://docs.microsoft.com/en-us/windows/uwp/audio-video-camera/process-media-frames-with-mediaframereader#handle-the-frame-arrived-event
// ExampleMediaFrameReference interface is based on Windows.Media.Core.FaceDetectionEffect.FaceDetected
// https://docs.microsoft.com/en-us/uwp/api/windows.media.capture.frames.multisourcemediaframereference
using (var mediaFrameReference = sender.TryAcquireLatestFrameBySourceKind(args.SourceKind))
{
FrameCollection.Add(mediaFrameReference);
}
}
catch (ObjectDisposedException) { }
finally { }
}
private void FrameReader_FaceDetected(ExampleMediaFrameReader sender, FaceAnalysis.FaceDetectedEventArgs args)
{
FaceDetected?.Invoke(this, args);
}
