private static IPin?EnumPins(IBaseFilter filter, Func <PIN_INFO, bool> func)
{
IEnumPins?pins = null;
IPin? ipin = null;
try
{
filter.EnumPins(ref pins);
int fetched = 0;
while (pins?.Next(1, ref ipin, ref fetched) == 0)
{
if (fetched == 0)
{
break;
}
var info = new PIN_INFO();
try
{
ipin?.QueryPinInfo(info);
var rc = func(info);
if (rc)
{
return(ipin);
}
}
finally
{
if (info.pFilter != null)
{
Marshal.ReleaseComObject(info.pFilter);
}
}
}
}
catch
{
if (ipin != null)
{
Marshal.ReleaseComObject(ipin);
}
throw;
}
finally
{
if (pins != null)
{
Marshal.ReleaseComObject(pins);
}
}
return(null);
}
public static IPin FindPin(IBaseFilter filter, string name)
{
IEnumPins enumpins = null;
IPin pin = null;
try
{
filter.EnumPins(ref enumpins);
int fetched = 0;
while (enumpins.Next(1, pin, fetched) == 0)
{
if (fetched == 0) break;
var info = new PIN_INFO();
try
{
}
finally
{
if (pin != null) Marshal.ReleaseComObject(pin);
if (info.Filter != null) Marshal.ReleaseComObject(info.Filter);
}
}
}
finally
{
}
return null;
}
