private void SetupGraph(DsDevice dev, int iFrameRate, int iWidth, int iHeight)
{
ISampleGrabber sampGrabber = null;
IBaseFilter capFilter = null;
ICaptureGraphBuilder2 capGraph = null;
graphBuilder = (IFilterGraph2)new FilterGraph();
mediaCtrl = graphBuilder as IMediaControl;
try
{
capGraph = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
sampGrabber = (ISampleGrabber)new SampleGrabber();
var hr = capGraph.SetFiltergraph(graphBuilder);
DsError.ThrowExceptionForHR(hr);
hr = graphBuilder.AddSourceFilterForMoniker(dev.Moniker, null, "Video Capture Device", out capFilter);
DsError.ThrowExceptionForHR(hr);
var baseGrabFlt = (IBaseFilter)sampGrabber;
ConfigureSampleGrabber(sampGrabber);
hr = graphBuilder.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (iFrameRate + iHeight + iWidth > 0)
SetConfigParms(capGraph, capFilter, iFrameRate, iWidth, iHeight);
hr = capGraph.RenderStream(PinCategory.Capture, MediaType.Video, capFilter, null, baseGrabFlt);
DsError.ThrowExceptionForHR(hr);
SaveSizeInfo(sampGrabber);
}
finally
{
if (capFilter != null)
Marshal.ReleaseComObject(capFilter);
if (sampGrabber != null)
Marshal.ReleaseComObject(sampGrabber);
if (capGraph != null)
Marshal.ReleaseComObject(capGraph);
}
}
public static DsDevice[] GetDevicesOfCat(Guid FilterCategory)
{
DsDevice[] devret;
var devs = new ArrayList();
IEnumMoniker enumMon;
var enumDev = (ICreateDevEnum)new CreateDevEnum();
var hr = enumDev.CreateClassEnumerator(FilterCategory, out enumMon, 0);
DsError.ThrowExceptionForHR(hr);
if (hr != 1)
{
try
{
try
{
var mon = new IMoniker[1];
while ((enumMon.Next(1, mon, IntPtr.Zero) == 0))
{
try
{
devs.Add(new DsDevice(mon[0]));
}
catch
{
Marshal.ReleaseComObject(mon[0]);
throw;
}
}
}
finally
{
Marshal.ReleaseComObject(enumMon);
}
devret = new DsDevice[devs.Count];
devs.CopyTo(devret);
}
catch
{
foreach (DsDevice d in devs)
{
d.Dispose();
}
throw;
}
}
else
{
devret = new DsDevice[0];
}
return devret;
}
