CODEWITHSUNDEEP
c#wpfkinect
MyKuLLSKI
MyKuLLSKI

Reputation: 5325

Pause Kinect Camera - Possible error in SDK reguarding event handler

I'm in the process of converting my Microsoft SDK Beta code to the Microsoft SDK Official Release that was released February 2012.

I added a generic PauseKinect() to pause the Kinect. My pause will really only remove the event handler that updated the image

Pros:

Cons:

Pause Method (Color Only)

internal void PauseColorImage(bool isPaused)
{
    if (isPaused)
    {
        _Kinect.ColorFrameReady -= ColorFrameReadyEventHandler;
        //_Kinect.ColorStream.Disable();
    }

    else
    {
        _Kinect.ColorFrameReady += ColorFrameReadyEventHandler;
        //_Kinect.ColorStream.Enable(ColorImageFormat.RgbResolution640x480Fps30);
    }
}

PROBLEM:

Even though I'm removing the event why is it still getting triggered?

NOTE:

Also when I pause the color image I'm also pausing the depth and skeleton in their object.

SIDE NOTE:

If I uncomment my code it works fine, but then it'll take forever to reinitialize which is not what I want to do.

MS in Reflector

public void AddHandler(EventHandler<T> originalHandler)
{
    if (originalHandler != null)
    {
        this._actualHandlers.Add(new ContextHandlerPair<T, T>(originalHandler, SynchronizationContext.Current));
    }
}

public void RemoveHandler(EventHandler<T> originalHandler)
{
    SynchronizationContext current = SynchronizationContext.Current;
    ContextHandlerPair<T, T> item = null;
    foreach (ContextHandlerPair<T, T> pair2 in this._actualHandlers)
    {
        EventHandler<T> handler = pair2.Handler;
        SynchronizationContext context = pair2.Context;
        if ((current == context) && (handler == originalHandler))
        {
            item = pair2;
            break;
        }
    }
    if (item != null)
    {
        this._actualHandlers.Remove(item);
    }
}


public void Invoke(object sender, T e)
{
    if (this.HasHandlers)
    {
        ContextHandlerPair<T, T>[] array = new ContextHandlerPair<T, T>[this._actualHandlers.Count];
        this._actualHandlers.CopyTo(array);
        foreach (ContextHandlerPair<T, T> pair in array)
        {
            EventHandler<T> handler = pair.Handler;
            SynchronizationContext context = pair.Context;
            if (context == null)
            {
                handler(sender, e);
            }
            else if (this._method == ContextSynchronizationMethod<T>.Post)
            {
                context.Post(new SendOrPostCallback(this.SendOrPostDelegate), new ContextEventHandlerArgsWrapper<T, T>(handler, sender, e));
            }
            else if (this._method == ContextSynchronizationMethod<T>.Send)
            {
               context.Send(new SendOrPostCallback(this.SendOrPostDelegate), new ContextEventHandlerArgsWrapper<T, T>(handler, sender, e));
            }
        }
    }
}

Upvotes: 9

Views: 658

Answers (1)

MyKuLLSKI
MyKuLLSKI

Reputation: 5325

After posting an identical question on the Microsoft forum and talking to multiple Microsoft representatives they basically said the only way to do a "pause" is to enable/disable the streams (uncomment my comments). Without saying it straight forward its a bug in the SDK. They are going to talk to the people in the development team and try to fix the issue in future releases.

EDIT

In the May 2012 Release it is STILL not fixed. Thanks Microsoft!

Upvotes: 5

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