private void OnRequestFrame(object sender, Communication.MessageHandler.MessageEventArgs EventArgs)
{
if (System.Threading.Monitor.TryEnter(connectionLock))
{
try
{
if (com != null)
{
byte count = EventArgs.data[0];
byte[] data = null;
if (nextFrame == null)
{
data = BuildNextFrame(count);
}
else
{
data = nextFrame;
}
com.SendMessage((byte)Commands.FRM_RESP, data);
long now = frameTimer.ElapsedTicks;
if (frameTimings.Count > 0)
{
long difference = now - frameTimings.Peek();
long ticksPerFrame = difference / frameTimings.Count;
double secondsPerFrame = ((double)ticksPerFrame / Stopwatch.Frequency);
double fps = 1 / secondsPerFrame;
difference = now - lastTimestamp;
secondsPerFrame = ((double)difference / Stopwatch.Frequency);
double fpslast = 1 / secondsPerFrame;
lock (fpsLock)
{
framesPerSecond = fps;
if (fpslast < fps * 0.75)
{
framesDroppedBelow75.Push(fpslast);
}
}
}
lastTimestamp = now;
frameTimings.Enqueue(now);
while (frameTimings.Count > frameTimingsMax)
{
frameTimings.Dequeue();
}
nextFrame = BuildNextFrame(count);
}
}
finally
{
System.Threading.Monitor.Exit(connectionLock);
}
}
this.labelFPS.InvokeIfRequired(UpdateFramesPerSecond);
}
