public void BuildGraph()
{
ICaptureGraphBuilder2 captureGraphBuilder2 = (ICaptureGraphBuilder2)null;
IBaseFilter ppFilter = (IBaseFilter)null;
ISampleGrabber sampleGrabber = (ISampleGrabber)null;
List <DeviceEnumerator> deviceEnumeratorList = (List <DeviceEnumerator>)null;
try
{
Logger.Info("Creating List of devices");
deviceEnumeratorList = DeviceEnumerator.ListDevices(Guids.VideoInputDeviceCategory);
}
catch (Exception ex)
{
Logger.Error("Exception in finding Video device. Err : {0}", (object)ex.ToString());
}
if (deviceEnumeratorList != null)
{
if (deviceEnumeratorList.Count != 0)
{
try
{
Logger.Info("found {0} Camera, Opening {1}", (object)deviceEnumeratorList.Count, (object)this.m_Unit);
DeviceEnumerator deviceEnumerator = this.m_Unit >= deviceEnumeratorList.Count ? deviceEnumeratorList[0] : deviceEnumeratorList[this.m_Unit];
this.m_FilterGraph = (IFilterGraph2) new FilterGraph();
this.m_mediaCtrl = this.m_FilterGraph as IMediaControl;
captureGraphBuilder2 = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
sampleGrabber = (ISampleGrabber) new SampleGrabber();
ErrorHandler errorHandler1 = (ErrorHandler)captureGraphBuilder2.SetFiltergraph((IGraphBuilder)this.m_FilterGraph);
if (errorHandler1.GetError() != 0)
{
Logger.Error("SetFiltergraph failed with {0:X}..", (object)errorHandler1.GetError());
}
ErrorHandler errorHandler2 = (ErrorHandler)this.m_FilterGraph.AddSourceFilterForMoniker(deviceEnumerator.Moniker, (IBindCtx)null, "Video input", out ppFilter);
if (errorHandler2.GetError() != 0)
{
Logger.Error("AddSourceFilterForMoniker failed with {0:X}", (object)errorHandler2.GetError());
}
AMMediaType pmt = new AMMediaType()
{
majorType = Guids.MediaTypeVideo
};
if (this.m_color == SupportedColorFormat.YUV2)
{
pmt.subType = Guids.MediaSubtypeYUY2;
}
else
{
if (this.m_color != SupportedColorFormat.RGB24)
{
throw new Exception("Unsupported color format");
}
pmt.subType = Guids.MediaSubtypeRGB24;
}
pmt.formatType = Guids.FormatTypesVideoInfo;
ErrorHandler errorHandler3 = (ErrorHandler)sampleGrabber.SetMediaType(pmt);
this.FreeAMMedia(pmt);
ErrorHandler errorHandler4 = (ErrorHandler)sampleGrabber.SetCallback((ISampleGrabberCB)this, 1);
if (errorHandler4.GetError() != 0)
{
Logger.Error("Grabber setcallback failed with {0:X}", (object)errorHandler4.GetError());
}
IBaseFilter baseFilter = (IBaseFilter)sampleGrabber;
ErrorHandler errorHandler5 = (ErrorHandler)this.m_FilterGraph.AddFilter(baseFilter, "FrameGrabber");
if (errorHandler5.GetError() != 0)
{
Logger.Error("AddFilter failed with {0:X}", (object)errorHandler5.GetError());
}
object ppint;
ErrorHandler errorHandler6 = (ErrorHandler)captureGraphBuilder2.FindInterface(Guids.PinCategoryCapture, Guids.MediaTypeVideo, ppFilter, typeof(IAMStreamConfig).GUID, out ppint);
if (errorHandler6.GetError() != 0)
{
Logger.Error("FindInterface failed with {0:X}", (object)errorHandler6.GetError());
}
if (!(ppint is IAMStreamConfig amStreamConfig))
{
throw new Exception("Stream config Error");
}
errorHandler3 = (ErrorHandler)amStreamConfig.GetFormat(out pmt);
VideoInfoHeader videoInfoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(pmt.pbFormat, (object)videoInfoHeader);
videoInfoHeader.AvgTimePerFrame = (long)(10000000 / this.m_FrameRate);
videoInfoHeader.BmiHeader.Width = this.m_Width;
videoInfoHeader.BmiHeader.Height = this.m_Height;
Marshal.StructureToPtr((object)videoInfoHeader, pmt.pbFormat, false);
ErrorHandler errorHandler7 = (ErrorHandler)amStreamConfig.SetFormat(pmt);
if (errorHandler7.GetError() != 0)
{
Logger.Error("conf.setformat failed with {0:X}", (object)errorHandler7.GetError());
}
this.FreeAMMedia(pmt);
ErrorHandler errorHandler8 = (ErrorHandler)captureGraphBuilder2.RenderStream(Guids.PinCategoryCapture, Guids.MediaTypeVideo, (object)ppFilter, (IBaseFilter)null, baseFilter);
if (errorHandler8.GetError() != 0)
{
Logger.Error("RenderStream failed with {0:X}", (object)errorHandler8.GetError());
}
AMMediaType amMediaType = new AMMediaType();
errorHandler3 = (ErrorHandler)sampleGrabber.GetConnectedMediaType(amMediaType);
if (amMediaType.formatType != Guids.FormatTypesVideoInfo)
{
throw new ColorFormatNotSupported("Not able to connect to Video Media");
}
if (amMediaType.pbFormat == IntPtr.Zero)
{
throw new Exception("Format Array is null");
}
VideoInfoHeader structure = (VideoInfoHeader)Marshal.PtrToStructure(amMediaType.pbFormat, typeof(VideoInfoHeader));
this.m_Width = structure.BmiHeader.Width;
this.m_Height = structure.BmiHeader.Height;
this.m_Stride = this.m_Width * ((int)structure.BmiHeader.BitCount / 8);
if (this.m_Buffer == IntPtr.Zero)
{
this.m_Buffer = Marshal.AllocCoTaskMem(this.m_Stride * this.m_Height);
}
this.FreeAMMedia(amMediaType);
return;
}
catch
{
throw;
}
finally
{
if (ppFilter != null)
{
Marshal.ReleaseComObject((object)ppFilter);
}
if (sampleGrabber != null)
{
Marshal.ReleaseComObject((object)sampleGrabber);
}
if (captureGraphBuilder2 != null)
{
Marshal.ReleaseComObject((object)captureGraphBuilder2);
}
}
}
}
Logger.Info("CAMERA: Could not find a camera device!");
}
public static List <DeviceEnumerator> ListDevices(Guid filterType)
{
List <DeviceEnumerator> deviceEnumeratorList = new List <DeviceEnumerator>();
IEnumMoniker ppEnumMoniker;
ErrorHandler classEnumerator = (ErrorHandler)((ICreateDevEnum) new CreateDevEnum()).CreateClassEnumerator(filterType, out ppEnumMoniker, 0);
if (ppEnumMoniker != null)
{
try
{
IMoniker[] rgelt = (IMoniker[])null;
try
{
while (true)
{
DeviceEnumerator deviceEnumerator;
string property;
do
{
rgelt = new IMoniker[1];
if (ppEnumMoniker.Next(1, rgelt, IntPtr.Zero) != 0)
{
Logger.Info("Breaking out of loop..");
goto label_11;
}
else
{
deviceEnumerator = new DeviceEnumerator()
{
m_Moniker = rgelt[0]
};
deviceEnumerator.m_FriendlyName = deviceEnumerator.getProperty("FriendlyName");
property = deviceEnumerator.getProperty("DevicePath");
}
}while (deviceEnumerator.m_FriendlyName == null || property == null || !property.Contains("\\usb#vid") && !property.Contains("\\pci#ven"));
deviceEnumeratorList.Add(deviceEnumerator);
Logger.Info("Camera device {0}", (object)deviceEnumerator.m_FriendlyName);
}
}
catch (Exception ex)
{
if (rgelt != null)
{
Marshal.ReleaseComObject((object)rgelt[0]);
}
deviceEnumeratorList = (List <DeviceEnumerator>)null;
Logger.Error("Failed to enumerate Video input devices: {0}", (object)ex.ToString());
throw;
}
}
finally
{
Marshal.ReleaseComObject((object)ppEnumMoniker);
}
}
else
{
Logger.Error("Cannot enumerate the device");
deviceEnumeratorList = (List <DeviceEnumerator>)null;
}
label_11:
return(deviceEnumeratorList);
}