Event or flag to see if Kinect is plugged in

Question

I want my program to alert if no kinect is found and then non-blockingly tell me when the user plugs in the kinect to the pc. What's the easiest way to do this. If it matters, i'm using the Beta 2 sdk rather than the newest version. Thanks!

Answer 1

Hey,

I'm using the actual SDK but it should also works with older SDK's. The HRESULT of NuiCreateSensorByIndex can be used:

hr = NuiCreateSensorByIndex(0, &m_pNuiSensor);

if (FAILED(hr))
    cout << "no kinect";

You can run this code in a loop until a Kinect is found.

Answer 2

The following answer applies to v1.0 of the SDK, not Beta 2:

You didn't indicate whether you're using native code or managed code. If you are using native code, setup a callback function as follows:

void CALLBACK OnSensorStatusChanged( HRESULT hrStatus, const OLECHAR* instanceName, const OLECHAR* uniqueDeviceName, void* pUserData )
{
    if (hrStatus == S_OK)
    {
        INuiSensor* pSensor = nullptr;
        if (SUCCEEDED(NuiCreateSensorById(instanceName, &pSensor)))
        {
            // pSensor represents a newly-connected sensor

            // ...

            // Done with sensor
            pSensor->Release();
        }
    }
}

When your application starts up, register your callback as follows:

NuiSetDeviceStatusCallback(OnSensorStatusChanged, nullptr);

If you need some kind of context in your callback function, pass a different value in place of nullptr; it will be passed to your callback function via the pUserData parameter.

John
K4W Dev

Answer 3

For managed code, your callback should be:

void OnSensorStatusChanged(object sender, StatusChangedEventArgs e)
{
    if (e.Status == KinectStatus.Connected)
    {
        // e.Sensor represents a newly-connected sensor

        // ...
    }
}

To register the callback at startup:

KinectSensor.KinecSensors.StatusChanged += OnSensorStatusChanged;

John
K4W Dev