public static async Task<ContinuousAutoFocus> StartAsync(FocusControl control)
{
var autoFocus = new ContinuousAutoFocus(control);
AutoFocusRange range;
if (control.SupportedFocusRanges.Contains(AutoFocusRange.FullRange))
{
range = AutoFocusRange.FullRange;
}
else if (control.SupportedFocusRanges.Contains(AutoFocusRange.Normal))
{
range = AutoFocusRange.Normal;
}
else
{
// Auto-focus disabled
return autoFocus;
}
FocusMode mode;
if (control.SupportedFocusModes.Contains(FocusMode.Continuous))
{
mode = FocusMode.Continuous;
}
else if (control.SupportedFocusModes.Contains(FocusMode.Single))
{
mode = FocusMode.Single;
}
else
{
// Auto-focus disabled
return autoFocus;
}
if (mode == FocusMode.Continuous)
{
// True continuous auto-focus
var settings = new FocusSettings()
{
AutoFocusRange = range,
Mode = mode,
WaitForFocus = false,
DisableDriverFallback = false
};
control.Configure(settings);
await control.FocusAsync();
}
else
{
// Simulated continuous auto-focus
var settings = new FocusSettings()
{
AutoFocusRange = range,
Mode = mode,
WaitForFocus = true,
DisableDriverFallback = false
};
control.Configure(settings);
var ignore = Task.Run(async () => { await autoFocus.DriveAutoFocusAsync(); });
}
return autoFocus;
}
public static async Task <ContinuousAutoFocus> StartAsync(FocusControl control)
{
var autoFocus = new ContinuousAutoFocus(control);
AutoFocusRange range;
if (control.SupportedFocusRanges.Contains(AutoFocusRange.FullRange))
{
range = AutoFocusRange.FullRange;
}
else if (control.SupportedFocusRanges.Contains(AutoFocusRange.Normal))
{
range = AutoFocusRange.Normal;
}
else
{
// Auto-focus disabled
return(autoFocus);
}
FocusMode mode;
if (control.SupportedFocusModes.Contains(FocusMode.Continuous))
{
mode = FocusMode.Continuous;
}
else if (control.SupportedFocusModes.Contains(FocusMode.Single))
{
mode = FocusMode.Single;
}
else
{
// Auto-focus disabled
return(autoFocus);
}
if (mode == FocusMode.Continuous)
{
// True continuous auto-focus
var settings = new FocusSettings()
{
AutoFocusRange = range,
Mode = mode,
WaitForFocus = false,
DisableDriverFallback = false
};
control.Configure(settings);
await control.FocusAsync();
}
else
{
// Simulated continuous auto-focus
var settings = new FocusSettings()
{
AutoFocusRange = range,
Mode = mode,
WaitForFocus = true,
DisableDriverFallback = false
};
control.Configure(settings);
var ignore = Task.Run(async() => { await autoFocus.DriveAutoFocusAsync(); });
}
return(autoFocus);
}
async void createCamera()
{
CaptureUse primaryUse = CaptureUse.Video;
mediaCapture = new MediaCapture();
DeviceInformationCollection webcamList = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
DeviceInformation backWebcam = (from webcam in webcamList
where webcam.EnclosureLocation != null &&
webcam.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Back
select webcam).FirstOrDefault();
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings
{
VideoDeviceId = backWebcam.Id,
AudioDeviceId = "",
StreamingCaptureMode = StreamingCaptureMode.Video,
PhotoCaptureSource = PhotoCaptureSource.VideoPreview
});
mediaCapture.VideoDeviceController.PrimaryUse = primaryUse;
mediaCapture.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
mediaCapture.VideoDeviceController.FlashControl.Enabled = false;
setEffects();
reader = new BarcodeReader
{
Options = new DecodingOptions
{
PossibleFormats = new BarcodeFormat[] { BarcodeFormat.QR_CODE },
TryHarder = true
}
};
captureElement.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
focusControl = mediaCapture.VideoDeviceController.FocusControl;
if (focusControl.Supported == true)
{
FocusSettings focusSetting = new FocusSettings()
{
AutoFocusRange = AutoFocusRange.FullRange,
Mode = FocusMode.Auto,
WaitForFocus = false,
DisableDriverFallback = false
};
focusControl.Configure(focusSetting);
await mediaCapture.VideoDeviceController.ExposureControl.SetAutoAsync(true);
//await focusControl.FocusAsync();
}
// zoom
if (this.mediaCapture.VideoDeviceController.ZoomControl.Supported)
{
sliderZoom.Minimum = this.mediaCapture.VideoDeviceController.ZoomControl.Min;
sliderZoom.Maximum = this.mediaCapture.VideoDeviceController.ZoomControl.Max;
sliderZoom.StepFrequency = this.mediaCapture.VideoDeviceController.ZoomControl.Step;
}
}
