async private void RequestCapability()
{
Windows.Security.Authorization.AppCapabilityAccess.AppCapability cap = Windows.Security.Authorization.AppCapabilityAccess.AppCapability.Create("webcam");
accessStatus = await cap.RequestAccessAsync();
capabilityInitialized = true;
}
private async void StartTracking()
{
Windows.Security.Authorization.AppCapabilityAccess.AppCapability cap = Windows.Security.Authorization.AppCapabilityAccess.AppCapability.Create("webcam");
var accessStatus = await cap.RequestAccessAsync();
var result = _qrCodesManager.StartQRTracking();
Debug.Log("Started qr tracker: " + result.ToString());
}
private async Task <QRTrackerStartResult> StartQRTrackingAsyncImpl(CancellationToken token)
{
#if WINDOWS_UWP
DebugLog("Requesting webcam capability");
Windows.Security.Authorization.AppCapabilityAccess.AppCapability cap = Windows.Security.Authorization.AppCapabilityAccess.AppCapability.Create("webcam");
var accessTask = cap.RequestAccessAsync().AsTask();
var completedTask = await Task.WhenAny(accessTask, Task.Delay(-1, token));
var accessStatus = (accessTask == completedTask) ? accessTask.Result : Windows.Security.Authorization.AppCapabilityAccess.AppCapabilityAccessStatus.DeniedBySystem;
if (accessStatus != Windows.Security.Authorization.AppCapabilityAccess.AppCapabilityAccessStatus.Allowed)
{
DebugLog("Failed to obtain webcam capability for qr code tracking");
}
else
{
DebugLog("Webcam capability granted.");
}
#endif
// Note: If the QRTracker is created prior to obtaining the webcam capability, initialization will fail.
if (qrTracker == null)
{
DebugLog("Creating qr tracker");
qrTracker = new QRTracker();
qrTracker.Added += QrTracker_Added;
qrTracker.Updated += QrTracker_Updated;
qrTracker.Removed += QrTracker_Removed;
}
if (!token.IsCancellationRequested &&
!IsTrackerRunning)
{
StartResult = qrTracker.Start();
if (StartResult == QRTrackerStartResult.Success)
{
DebugLog("Successfully started qr tracker");
IsTrackerRunning = true;
}
else
{
Debug.LogWarning("Failed to start qr tracker: " + StartResult.ToString());
}
}
return(await Task.FromResult(StartResult));
}
