void RunWorker()
{
try
{
graph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IGraphBuilder;
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
grabberObject = grabber as IBaseFilter;
graph.AddFilter(sourceObject, "source");
graph.AddFilter(grabberObject, "grabber");
using (AMMediaType mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
grabber.SetMediaType(mediaType);
if (graph.Connect(sourceObject.GetPin(PinDirection.Output, 0), grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (grabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
capGrabber.Width = header.BmiHeader.Width;
capGrabber.Height = header.BmiHeader.Height;
}
}
graph.Render(grabberObject.GetPin(PinDirection.Output, 0));
grabber.SetBufferSamples(false);
grabber.SetOneShot(false);
grabber.SetCallback(capGrabber, 1);
IVideoWindow wnd = (IVideoWindow)graph;
wnd.put_AutoShow(false);
wnd = null;
control = (IMediaControl)graph;
control.Run();
while (!stopSignal.WaitOne(0, true))
{
Thread.Sleep(10);
}
control.StopWhenReady();
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
finally
{
graph = null;
sourceObject = null;
grabberObject = null;
grabber = null;
capGrabber = null;
control = null;
}
}
public void Start()
{
if (worker == null)
{
capGrabber = new CapGrabber();
capGrabber.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(capGrabber_PropertyChanged);
capGrabber.NewFrameArrived += new EventHandler(capGrabber_NewFrameArrived);
stopSignal = new ManualResetEvent(false);
worker = new Thread(RunWorker);
worker.Start();
}
else
{
Stop();
Start();
}
}
