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(); } }