protected virtual void onBlackScreen(BlackScreenEventArgs e)
{
if (frameBuffer[0] == null)
{
return;
}
BlackScreen?.Invoke(this, e);
for (int i = 0; i < frameBuffer.Length; i++)
{
frameBuffer[i]?.Dispose();
frameBuffer[i] = null;
}
}
/// <summary>
/// Main video processing loop
/// </summary>
public void processingLoop()
{
while (true)
{
try
{
initializeCaptureDevice(deviceId, resolution);
//Initalize the currentFrame mat with a byte[] pointer so we can access its data directly without a conversion to Image<>
byte[] data = new byte[frameSize.Width * frameSize.Height * 3];
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
Mat currentFrame = new Mat(frameSize, DepthType.Cv8U, 3, dataHandle.AddrOfPinnedObject(), frameSize.Width * 3);
WasBlack = false;
bool WasClear = false;
bool WaitForClearStats = false;
int skip = frameSize.Width / 50;
DateTime blackStart = DateTime.Now;
while (true)
{
if (shouldStop)
{
return;
}
cap.Retrieve(currentFrame);
Dictionary <int, int> hues = getHues(data, frameSize, skip);
if (WasBlack)
{
WasBlack = isBlackFrame(hues);
if (!WasBlack)
{
BlackScreenEventArgs args = new BlackScreenEventArgs();
args.frameBuffer = copyFrameBuffer();
args.currentFrame = getLevelScreenImageFromBuffer(args.frameBuffer);
args.seconds = DateTime.Now.Subtract(blackStart).TotalMilliseconds / 1000;
onBlackScreen(args);
}
}
else if (WasClear)
{
WasClear = isClearFrame(hues);
if (!WasClear)
{
WaitForClearStats = true;
}
}
else if (WaitForClearStats && isClearWithStatsScreen(hues))
{
// HACK: Apart from taking up more CPU to do a comparision like the Level Select screen this is the best solution imo
// Match happens during transition, so 500ms is long enough to get to the screen, but not long enough to exit and miss it.
Thread.Sleep(593);
cap.Retrieve(currentFrame);
ClearScreenEventArgs args = new ClearScreenEventArgs();
args.currentFrame = currentFrame.Clone().ToImage <Bgr, Byte>();
// Check to see if this is the clear screen with comments on - things are positioned differently.
// Top of screen is yellow if comments are on
Size topOfScreen = new Size(frameSize.Width, frameSize.Height / 6);
Dictionary <int, int> topHues = getHues(data, topOfScreen, skip);
if (isMostlyYellow(topHues))
{
args.commentsEnabled = true;
}
onClearScreen(args);
}
else if (isBlackFrame(hues))
{
WasBlack = true;
WaitForClearStats = false; // XXX: If we get a black screen and this is true, something weird is going on
blackStart = DateTime.Now;
}
else if (isClearFrame(hues))
{
WasClear = true;
}
}
}
catch (Exception ex)
{
log.Debug("Exception in main procesisng loop");
log.Error(ex);
Thread.Sleep(5000);
}
}
}
