public async Task <ImageAnalyzer> CaptureFrameAsync()
{
try
{
if (!(await this.frameProcessingSemaphore.WaitAsync(250)))
{
return(null);
}
// Capture a frame from the preview stream
var videoFrame = new VideoFrame(BitmapPixelFormat.Bgra8, CameraResolutionWidth, CameraResolutionHeight);
using (var currentFrame = await captureManager.GetPreviewFrameAsync(videoFrame))
{
using (SoftwareBitmap previewFrame = currentFrame.SoftwareBitmap)
{
ImageAnalyzer imageWithFace = new ImageAnalyzer(await CoreUtil.GetPixelBytesFromSoftwareBitmapAsync(previewFrame));
imageWithFace.ShowDialogOnFaceApiErrors = this.ShowDialogOnApiErrors;
imageWithFace.FilterOutSmallFaces = this.FilterOutSmallFaces;
imageWithFace.UpdateDecodedImageSize(this.CameraResolutionHeight, this.CameraResolutionWidth);
imageWithFace.CameraIPAdres = CameraIPAdres;
imageWithFace.imageWidth = 1280;
imageWithFace.imageHeight = 720;
imageWithFace.CaptureTime = DateTime.Now;
imageWithFace.ListDetectedFaceJson = JsonConvert.SerializeObject(faces.Select(r => r.FaceBox).ToList());
return(imageWithFace);
}
}
}
catch (Exception ex)
{
if (this.ShowDialogOnApiErrors)
{
// await Util.GenericApiCallExceptionHandler(ex, "Lỗi chụp ảnh.");
}
}
finally
{
this.frameProcessingSemaphore.Release();
}
return(null);
}