public void Run(CancellationToken token)
{
if (IsRunning)
{
throw new Exception(nameof(DesktopDuplicatorReader) + " is already running!");
}
IsRunning = true;
_log.Debug("Started Desktop Duplication Reader.");
Bitmap image = null;
try
{
BitmapData bitmapData = new BitmapData();
while (!token.IsCancellationRequested)
{
var frameTime = Stopwatch.StartNew();
var newImage = GetNextFrame(image);
if (newImage == null)
{
//there was a timeout before there was the next frame, simply retry!
continue;
}
image = newImage;
_logic.ProcessNewImage(newImage);
int minFrameTimeInMs = 1; //1000/FPS
var elapsedMs = (int)frameTime.ElapsedMilliseconds;
if (elapsedMs < minFrameTimeInMs)
{
Thread.Sleep(minFrameTimeInMs - elapsedMs);
}
}
}
finally
{
image?.Dispose();
_desktopDuplicator?.Dispose();
_desktopDuplicator = null;
_log.Debug("Stopped Desktop Duplication Reader.");
IsRunning = false;
}
}
private Bitmap GetNextFrame(Bitmap reusableBitmap)
{
if (_desktopDuplicator == null)
{
_desktopDuplicator = new DesktopDuplicator(0, settings.Monitor);
}
try
{
return(_desktopDuplicator.GetLatestFrame(reusableBitmap));
}
catch (Exception ex)
{
if (ex.Message != "_outputDuplication is null")
{
_log.Error(ex, "GetNextFrame() failed.");
}
_desktopDuplicator?.Dispose();
_desktopDuplicator = null;
return(null);
}
}
