private void WorkerThread(object start)
{
if (BehaviorVector[(int)BehaviorVectorMask.DispatchOnWorkerThread])
{
_dispatchOnWorkerThread = true;
}
FrameInfo = ((Func <IFrameInfo>)start)();
var sampleGrabberCB = new SampleGrabberCB(FrameInfo, _dispatchOnWorkerThread);
OnEnterWorkerThread();
try
{
var graph = (Activator.CreateInstance(Type.GetTypeFromCLSID(Registry.FilterGraph)) as IGraphBuilder);
var sourceObject = FilterInfo.CreateFilter(_device.Moniker);
var sampleGrabber = (Activator.CreateInstance(Type.GetTypeFromCLSID(Registry.SampleGrabber)) as ISampleGrabber);
var grabberObject = (sampleGrabber as IBaseFilter);
graph.AddFilter(sourceObject, "source");
graph.AddFilter(grabberObject, "grabber");
// set media type for our grabber
using (var mediaType = new AMMediaType())
{
mediaType.MajorType = Registry.MediaTypes.Video;
mediaType.SubType = Registry.MediaSubTypes.RGB32;
sampleGrabber.SetMediaType(mediaType);
// and then connect device filter to out pin and grabber to in pin. then get capabilities of video received (this stuff comes from your web camera manufacturer)
if (graph.Connect(sourceObject.GetPin(PinDirection.Output, 0), grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (sampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
_frameInfo.SetProperties((VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader)));
}
}
// out pin to grabber without buffering and callback to grabber object (this one will get all images from our source).
graph.Render(grabberObject.GetPin(PinDirection.Output, 0));
sampleGrabber.SetBufferSamples(false);
sampleGrabber.SetOneShot(false);
sampleGrabber.SetCallback(sampleGrabberCB, 1);
// dump output window
var wnd = (IVideoWindow)graph;
wnd.put_AutoShow(false); wnd = null;
// and run the controller
var control = (IMediaControl)graph;
control.Run();
//
if (_dispatchOnWorkerThread)
{
Dispatcher.Run();
//while (!WaitHandle.WaitAll(new WaitHandle[] { _stopSignal }, 10, true))
while (!_stopEvent.WaitOne(10, true))
{
Dispatcher.Run();
}
Dispatcher.ExitAllFrames();
}
else
{
while (!_stopEvent.WaitOne(0, true))
{
Thread.Sleep(10);
}
}
//
control.StopWhenReady();
}
}
catch (Exception ex)
{
//Console.WriteLine(ex);
Debug.WriteLine(ex);
throw;
}
finally
{
// guaranteed exit
OnExitWorkerThread();
}
}