public static async Task ConfigureMedia(CaptureElement captureElement, LookupItemDTO cameraDevice, bool useHighRes)
{
if (cameraDevice != null)
{
if (captureElement.Source != null)
{
await captureElement.Source.StopPreviewAsync();
captureElement.Source = null;
}
var mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings { VideoDeviceId = cameraDevice.ValueLong });
try
{
var resolutions = mediaCapture.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.Photo).Select(x => x as VideoEncodingProperties);
double ratio = 480.00 / 640.00;
VideoEncodingProperties imageResolution = null;
//If using High Resolution, pick the largest resolution with the same aspect ratio as the default photo size,
// if not pick the resolution with the same aspect ratio and where the width is greater than or equal to the default photo size
if (!useHighRes)
{
imageResolution = resolutions.Where(x => x.Width >= 640.00 && ratio == ((double)x.Height / (double)x.Width)).OrderBy(x => x.Height * x.Width).FirstOrDefault();
}
if (imageResolution == null || useHighRes)
{
imageResolution = resolutions.Where(x => ratio == ((double)x.Height / (double)x.Width)).OrderByDescending(x => x.Height * x.Width).FirstOrDefault();
}
if (imageResolution != null)
{
await mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.Photo, imageResolution);
}
}
catch
{
//TODO: Swallow the error for now, some devices don't support MediaStreamType.Photo and i haven't found a good solution to handle this yet
}
mediaCapture.VideoDeviceController.PrimaryUse = CaptureUse.Photo;
captureElement.Source = mediaCapture;
captureElement.Stretch = Windows.UI.Xaml.Media.Stretch.UniformToFill;
await mediaCapture.StartPreviewAsync();
}
}
public static LookupItemDTO GetNextCamera(IEnumerable <LookupItemDTO> availableCameras, string currentCamera, bool saveAsDefault)
{
LookupItemDTO nextCamera = null;
if (availableCameras != null && availableCameras.Any())
{
nextCamera = availableCameras.First(x => x.ValueLong.Contains("VID_19AB&PID_2000"));
if (nextCamera == null)
{
nextCamera = availableCameras.First();
}
}
return(nextCamera);
}
