public static async Task <IEnumerable <Guid?> > DetectFaceAsync(IFaceStream input)
{
await SimulateLowQoSNetworkAsync();
var random = Random.NextDouble();
if (random < .98)
{
return(Enumerable.Range(0, 1).Select(_ => (Guid?)Guid.NewGuid()));
}
else if (random < .99)
{
return(Enumerable.Range(0, 2).Select(_ => (Guid?)Guid.NewGuid()));
}
else
{
return(new Guid?[] { });
}
}
public static async Task <IEnumerable <bool> > DetermineAccessAsync(IFaceStream input)
{
try
{
return(await DetectFaceAsync(input)
.ContinueWith(
task => task.Result
.Where(faceId => faceId.HasValue)
.Select(faceId => RecognizeFaceAsync(faceId.Value)))
.ContinueWith(
task => task.Result.AsCompleted()
.Where(personId => personId.HasValue)
.Select(personId => DetermineAccessAsync(personId.Value)))
.ContinueWith(
task => task.Result.AsCompleted()));
}
finally
{
input.FaceStream.Dispose();
}
}
public void Post(IFaceStream stream)
{
ProcessingBlock.Post(stream);
}
