public override void OnProcessing(Frame current)
{
if (buffer == null || !current.SameSizeAs(buffer.First))
{
buffer = new FrameBuffer(framesNeeded, current.Width, current.Height);
}
var result = new MotionProcessorResult();
//Check for duplicate frames, and assume previous result for them
if (buffer.Count > 0 && !current.IsDifferentFrom(buffer.First))
{
current.ProcessorResult = (MotionProcessorResult)buffer.First.ProcessorResult;
current.IsReadyForRender = true;
return;
}
if (buffer.Count == framesNeeded)
{
buffer.RemoveFirst();
}
buffer.Enqueue(current);
if (buffer.Count == framesNeeded)
{
var prev = buffer.First;
var roi = new System.Windows.Rect
(
new Point(current.Width * LeftBoundPCT, current.Height * TopBoundPCT),
new Point(current.Width * RightBoundPCT, current.Height * BottomBoundPCT)
);
var changedPixels = current.ChangeExtentPoints(prev, Threshold, roi);
result.Threshold = Threshold;
result.ChangedPixels = changedPixels;
result.ChangedPixelsCount = changedPixels.Count;
result.Frame = current;
result.FrameIndex = current.FrameIndex;
result.FrameTime = current.FrameTime;
}
current.ProcessorResult = result;
current.IsReadyForRender = true;
}
private void EnqueueStandardHeadClip()
{
var isDuplicate =
queue.Count > 0 &&
!currentFrame.IsDifferentFrom(queue.Last);
//Don't add duplicates to frame history
if (isDuplicate)
{
return;
}
//Subclip head
subclippedHead.DrawFrame(currentFrame, 0, 0, 1, 0,
Space.HeadOffset.X, Space.HeadOffset.Y);
//Resize to standard into stdHeadClip
subclippedHead.ScaleHQ(Space.StandardWidth, Space.StandardHeight, stdHeadClip.Bitmap);
//We're computing T-1 frame's antenna positions
//T-2 frame should be the last frame part of the background
if (queue.Count >= FastMotionHistLength - 1)
{
//Because T has not been added yet, T-2 is still T-1
var forBackground = queue.GetNthBeforeLast(1);
//BG update takes a while, do it in parallel
backgroundUpdater = new Thread(() =>
{
//Add to background queue
background.Append(forBackground);
});
backgroundUpdater.Start();
}
//Enque into the buffer
//Remove oldest frame
if (queue.Count >= FastMotionHistLength)
{
queue.RemoveFirst();
}
//Add new one
queue.Enqueue(stdHeadClip);
}
