InfraredTorchControl Class

Reference

Definition

Namespace:: Windows.Media.Devices

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Edit

Provides functionality for controlling the infrared torch LED settings on a capture device.

public ref class InfraredTorchControl sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 524288)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class InfraredTorchControl final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 524288)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class InfraredTorchControl

Public NotInheritable Class InfraredTorchControl

Inheritance: Object Platform::Object IInspectable InfraredTorchControl

Attributes: ContractVersionAttribute MarshalingBehaviorAttribute

Windows requirements

Device family	Windows 10, version 1903 (introduced in 10.0.18362.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v8.0)

Examples

using Windows.Media.Capture;

MediaCapture mediaCapture = new MediaCapture();

public MainPage()
{
    this.InitializeComponent();
}

protected override async void OnNavigatedTo(NavigationEventArgs e)
{
    await mediaCapture.InitializeAsync();

    // Preview is Windows.UI.Xaml.Controls.CaptureElement defined in XAML file
    // and used to render camera preview
    Preview.Source = mediaCapture;
    await mediaCapture.StartPreviewAsync();

    if (!TryIncrementInfraredPower())
    {
        Debug.WriteLine("Failed to increment InfraredTorch power");
    }
}

private bool TryIncrementInfraredPower()
{
    bool incrementSucceeded = false;

    if (mediaCapture.VideoDeviceController.InfraredTorchControl.IsSupported)
    {
        Debug.WriteLine("IR torch supported");
        InfraredTorchControl infraredTorchControl = mediaCapture.VideoDeviceController.InfraredTorchControl;
        var maxPower = infraredTorchControl.MaxPower;
        var powerStep = infraredTorchControl.PowerStep;
        var oldPower = infraredTorchControl.Power;

        if (oldPower < maxPower)
        {
            infraredTorchControl.Power = oldPower + powerStep;
            incrementSucceeded = true;
        }
        else
        {
            Debug.WriteLine("InfraredTorch is already at max power");
        }
    }

    return incrementSucceeded;
}

Remarks

The InfraredTorchControl enables apps to control the power and behavior of the Infrared LED.

You can find out if a device supports this control by checking InfraredTorchControl.IsSupported.

You can access the InfraredTorchControl for the capture device through MediaCapture.VideoDeviceController.

Properties

CurrentMode	Gets the current operation mode of the infrared LED.
IsSupported	Gets a value that indicates if the capture device supports the InfraredTorchControl.
MaxPower	Gets the maximum infrared LED power value supported by the capture device.
MinPower	Gets the minimum infrared LED power value supported by the capture device.
Power	Gets or sets the current infrared LED power value.
PowerStep	Gets the supported power step value.
SupportedModes	SupportedModes property is used to find out modes that the infrared LED supports.

Applies to

Delen via