public static IBaseFilter AddFilterByDevicePath(IGraphBuilder graphBuilder, string devicePath, string name)
{
int hr = 0;
IBaseFilter filter = null;
#if USING_NET11
UCOMIBindCtx bindCtx = null;
UCOMIMoniker moniker = null;
#else
IBindCtx bindCtx = null;
IMoniker moniker = null;
#endif
int eaten;
if (graphBuilder.IsNull())
{
throw new ArgumentNullException("graphBuilder");
}
try
{
hr = NativeMethods.CreateBindCtx(0, out bindCtx);
Marshal.ThrowExceptionForHR(hr);
hr = NativeMethods.MkParseDisplayName(bindCtx, devicePath, out eaten, out moniker);
Marshal.ThrowExceptionForHR(hr);
hr = (graphBuilder as IFilterGraph2).AddSourceFilterForMoniker(moniker, bindCtx, name, out filter);
DsError.ThrowExceptionForHR(hr);
}
catch
{
// An error occur. Just returning null...
}
finally
{
if (bindCtx.NotNull())
{
Marshal.ReleaseComObject(bindCtx);
}
if (moniker.NotNull())
{
Marshal.ReleaseComObject(moniker);
}
}
return(filter);
}