/// <summary>
/// Adds the new skeletal drawing object to the queue to be processed
/// </summary>
/// <param name="skeletalData">new object with the data</param>
/// <returns>number tasks outstanding in the queue</returns>
public int AddToQueue(SkeletalData skeletalData)
{
//Decrement the semaphore to make sure the spot is available
this.requestSkeletalData.WaitOne();
lock (_threadLock)
{
dataQueue.Enqueue(skeletalData);
}
//Increament the semaphore to indicate there is work to do
int previousCount = handleRequests.Release();
return previousCount;
}
/// <summary>
/// Processes the new skeleton data by passing the new object to the respective thread and checks the
/// conditions if the gesture recognition has not stopped or started again or the first time
/// </summary>
/// <param name="skeletalData">the new skeleton information object</param>
/// <returns>Processing result (success or failure)</returns>
private int ProcessNewSkeletalData(SkeletalData skeletalData)
{
int processingResult = (int)ResultCodes.Success;
do
{
if (skeletalData == null)
{
processingResult = (int)ResultCodes.OutOfMemory;
break;
}
if (!this.stopVisualThreads)
{
SkeletalDrawing.SkeletalDrawingData newDrawingData = new SkeletalDrawing.SkeletalDrawingData();
newDrawingData.SetSkeletalFrame(skeletalData.SkeletonFrame);
this.skeletalDrawingObject.AddToQueue(newDrawingData);
}
if (!this.trackedState && CheckIntialCondition(skeletalData) == (int)ResultCodes.GestureDetected)
{
skeletalDataLogger.Debug("this.trackedstate is true");
this.trackedState = true;
}
this.stopGestureRecognition = StopGestureRecognition(skeletalData);
if (this.trackedState)
{
if (!this.stopGestureRecognition)
{
GestureDispatcher.GestureData newGestureData = new GestureDispatcher.GestureData();
newGestureData.SetSkeletalFrame(skeletalData.SkeletonFrame);
skeletalDataLogger.Debug("traked state is true drawing data added into processor queue");
this.gestureDispatch.StopVisualThread = this.stopVisualThreads;
this.gestureDispatch.ProcessNewGestureData(newGestureData);
}
else
{
this.trackedState = false;
}
}
} while (false);
return processingResult;
}
/// <summary>
/// Checks the condition if the Gesure recognition need to be stopped
/// </summary>
/// <param name="skeletalData">the new skeleton information object</param>
/// <returns>true/false based on the conditions matched</returns>
private bool StopGestureRecognition(SkeletalData skeletalData)
{
bool stopResult = false;
SkeletonFrame currentFrame = skeletalData.SkeletonFrame;
foreach (SkeletonData data in currentFrame.Skeletons)
{
if (SkeletonTrackingState.Tracked == data.TrackingState)
{
Joint headJoint = data.Joints[JointID.Head];
Joint rightHandJoint = data.Joints[JointID.HandRight];
Joint leftHandJoint = data.Joints[JointID.HandLeft];
if (rightHandJoint.Position.Y > headJoint.Position.Y && leftHandJoint.Position.Y > headJoint.Position.Y)
{
stopResult = true;
break;
}
}
}
return stopResult;
}
/// <summary>
/// Checks the intial condition if the gesture recognition need to be started
/// </summary>
/// <param name="skeletalData">the new skeleton information object</param>
/// <returns>condition detected - different code values</returns>
private int CheckIntialCondition(SkeletalData skeletalData)
{
int conditionCheck = -1;
SkeletonFrame currentFrame = skeletalData.SkeletonFrame;
foreach (SkeletonData data in currentFrame.Skeletons)
{
if (SkeletonTrackingState.Tracked == data.TrackingState)
{
Joint headJoint = data.Joints[JointID.Head];
Joint rightHandJoint = data.Joints[JointID.HandRight];
Joint leftHandJoint = data.Joints[JointID.HandLeft];
if (this.stopGestureRecognition)
{
conditionCheck = (int)ResultCodes.GestureDetectionFailed;
break;
}
if (rightHandJoint.Position.Y > headJoint.Position.Y && leftHandJoint.Position.Y > headJoint.Position.Y)
{
conditionCheck = (int)ResultCodes.GestureDetectionFailed;
break;
}
if (rightHandJoint.Position.Y > headJoint.Position.Y && leftHandJoint.Position.Y < headJoint.Position.Y)
{
conditionCheck = (int)ResultCodes.GestureDetected;
break;
}
}
}
return conditionCheck;
}