private Func <Bitmap> GetBitmapFromSampleGrabberCallback(DirectShow.ISampleGrabber i_grabber, int width,
int height, int stride)
{
var sampler = new SampleGrabberCallback();
i_grabber.SetCallback(sampler, 1); // WhichMethodToCallback = BufferCB
return(() => sampler.GetBitmap(width, height, stride));
}
public void createSampleGrabber(ref string strPreviewIn, ref string strPreviewOut, ref string strDevice, ref string strPinOut, ref IBaseFilter pRen)
{
Guid CLSID_SampleGrabber = new Guid("{C1F400A0-3F08-11D3-9F0B-006008039E37}"); //qedit.dll
int hr = 0;
_class.Debug.Log("");
_class.Debug.Log("Creating SampleGrabber");
//add SampleGrabber
IBaseFilter pSampleGrabber = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_SampleGrabber));
hr = _class.Graph.CaptureGraph.AddFilter(pSampleGrabber, "SampleGrabber");
_class.Debug.Log("-> " + DsError.GetErrorText(hr));
_class.GraphPin.ListPin(pSampleGrabber);
string strSampleIn = _class.GraphPin.AssumePinIn("Input");
string strSampleOut = _class.GraphPin.AssumePinOut("Output");
_class.Debug.Log("Set samplegrabber resolution feed");
if (_class.Resolution.List.Count > 0)
{
hr = ((ISampleGrabber)pSampleGrabber).SetMediaType(_class.Resolution.Type[_class.Var.VideoResolutionIndex]);
_class.Debug.Log("-> " + DsError.GetErrorText(hr));
}
else
{
_class.Debug.Log("[ERR] failure in video resolution list");
}
_class.Debug.Log("");
_class.Debug.Log("*** Connect " + strDevice + " (" + strPinOut + ") to SampleGrabber (" + strSampleIn + ")");
//hr = CaptureGraph.ConnectDirect(_class.GraphPin.GetPin(pRen, strPinOut), _class.GraphPin.GetPin(pSampleGrabber, strPreviewIn), null);
hr = _class.Graph.CaptureGraph.ConnectDirect(_class.GraphPin.GetPin(pRen, "Capture"), _class.GraphPin.GetPin(pSampleGrabber, "Input"), null);
if (hr == 0)
{
var cb = new SampleGrabberCallback();
cb.GetForm1Handle(_class.FrmMain);
var sampleGrabber = (ISampleGrabber)pSampleGrabber;
sampleGrabber.SetCallback(cb, 1);
_class.Debug.Log("[OK] Connected " + strDevice + " to SampleGrabber");
strDevice = "Sample Grabber";
pRen = pSampleGrabber;
strPinOut = strSampleOut;
}
else
{
_class.Debug.Log("[NG] Cant connect SampleGrabber to video Capture feed. Attempting to continue.");
_class.Debug.Log("-> " + DsError.GetErrorText(hr));
}
}
private SampleGrabber BuildGrabber(string filterNamePrefix, IPin srcOutputPin,
Guid majorType, Guid subType, Guid formatType, SampleGrabberCallback.BufferCBEventHandler callback)
{
// Create Filter
SampleGrabber sampleGrabber = CreateSampleGrabber(majorType, subType, formatType, callback);
NullRenderer nullRenderer = CreateNullRenderer();
// Add Filter
GraphBuilder.AddFilter(sampleGrabber as IBaseFilter, filterNamePrefix + " Sample Grabber");
GraphBuilder.AddFilter(nullRenderer as IBaseFilter, filterNamePrefix + " Null Renderer");
// Connect srcOutput -> grabberInput, grabberOutput -> rendererInput
IPin grabberIn = Util.FindInputPin(sampleGrabber as IBaseFilter);
IPin grabberOut = Util.FindOutputPin(sampleGrabber as IBaseFilter);
IPin rendererIn = Util.FindInputPin(nullRenderer as IBaseFilter);
GraphBuilder.Connect(srcOutputPin, grabberIn);
GraphBuilder.Connect(grabberOut, rendererIn);
Util.FreePin(rendererIn);
Util.FreePin(grabberOut);
Util.FreePin(grabberIn);
Marshal.ReleaseComObject(nullRenderer);
return sampleGrabber;
}
private void CaptureVideo()
{
int retVal;
graph = (IGraphBuilder) new FilterGraph();
capture = (ICaptureGraphBuilder2) new CaptureGraphBuilder();
IMediaControl control = (IMediaControl)graph;
IMediaEventEx eventEx = (IMediaEventEx)graph;
retVal = capture.SetFiltergraph(graph);
Dictionary <string, IMoniker> devices = EnumDevices(Clsid.VideoInputDeviceCategory);
if (devices.Count == 0)
{
return;
}
IMoniker moniker = devices.First().Value;
object obj = null;
moniker.BindToObject(null, null, typeof(IBaseFilter).GUID, out obj);
IBaseFilter baseFilter = (IBaseFilter)obj;
retVal = graph.AddFilter(baseFilter, devices.First().Key);
Guid CLSID_SampleGrabber = new Guid("{C1F400A0-3F08-11D3-9F0B-006008039E37}");
IBaseFilter grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_SampleGrabber)) as IBaseFilter;
var media = new AMMediaType();
media.MajorType = MediaType.Video;
media.SubType = MediaSubType.RGB24;
media.FormatType = FormatType.VideoInfo;
retVal = ((ISampleGrabber)grabber).SetMediaType(media);
object configObj;
retVal = capture.FindInterface(PinCategory.Capture, MediaType.Video, baseFilter, typeof(IAMStreamConfig).GUID, out configObj);
IAMStreamConfig config = (IAMStreamConfig)configObj;
AMMediaType pmt;
retVal = config.GetFormat(out pmt);
var header = (VideoInfoHeader)Marshal.PtrToStructure(pmt.FormatPtr, typeof(VideoInfoHeader));
var width = header.BmiHeader.Width;
var height = header.BmiHeader.Height;
var stride = 4 * ((24 * width + 31) / 32); //width * (header.BmiHeader.BitCount / 8);
callback = new SampleGrabberCallback()
{
Width = width, Height = height, Stride = stride
};
callback.callback = Image_OnPreview;
retVal = ((ISampleGrabber)grabber).SetCallback(callback, 0);
retVal = graph.AddFilter(grabber, "SampleGrabber");
IPin output = GetPin(baseFilter, p => p.Name == "Capture");
IPin input = GetPin(grabber, p => p.Name == "Input");
IPin preview = GetPin(grabber, p => p.Name == "Output");
//retVal = graph.ConnectDirect(output, input, pmt);
//retVal = graph.Connect(output, input);
retVal = capture.RenderStream(PinCategory.Preview, MediaType.Video, baseFilter, grabber, null);
//var wih = new WindowInteropHelper(this);
var panel = FindName("PART_VideoPanel") as System.Windows.Forms.Panel;
IVideoWindow window = (IVideoWindow)graph;
retVal = window.put_Owner(panel.Handle);
retVal = window.put_WindowStyle(WindowStyles.WS_CHILD | WindowStyles.WS_CLIPCHILDREN);
retVal = window.SetWindowPosition(0, 0, (int)panel.ClientSize.Width, (int)panel.ClientSize.Height);
retVal = window.put_MessageDrain(panel.Handle);
retVal = window.put_Visible(-1); //OATRUE
retVal = control.Run();
}
public IpRuder(String preferedCaptureDevice)
{
SampleGrabberCount = 0;
PreferedCaptureDevice = preferedCaptureDevice;
WakeProcessing = new ManualResetEvent(false);
ProccessingEvents = new Thread(() =>
{
try
{
EventCode ev;
IntPtr p1, p2;
while (true)
{
WakeProcessing.WaitOne( );
while (VideoEvent.GetEvent(out ev, out p1, out p2, 0) == 0)
{
try
{
if (ev == EventCode.Complete || ev == EventCode.UserAbort)
{
StopVideo( );
break;
}
else if (ev == EventCode.ErrorAbort)
{
Console.WriteLine("An error occured: HRESULT={0:X}", p1);
StopVideo( );
break;
}
}
finally
{
VideoEvent.FreeEventParams(ev, p1, p2);
}
}
while (PhotoEvent.GetEvent(out ev, out p1, out p2, 0) == 0)
{
try
{
if (ev == EventCode.Complete || ev == EventCode.UserAbort)
{
StopPhoto( );
break;
}
else if (ev == EventCode.ErrorAbort)
{
Console.WriteLine("An error occured: HRESULT={0:X}", p1);
StopPhoto( );
break;
}
PhotoEvent.FreeEventParams(ev, p1, p2);
}
finally
{
PhotoEvent.FreeEventParams(ev, p1, p2);
}
}
Thread.Sleep(500);
}
}
catch (COMException ex)
{
Console.WriteLine("COM error: " + ex.ToString( ));
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.ToString( ));
}
});
ProccessingEvents.IsBackground = true;
ProccessingEvents.Start( );
PhotoCallBack = new SampleGrabberCallback( );
}
