private int getDeviceID(IBaseFilter tunerFilter)
{
IKsPin pKsPin = DsFindPin.ByDirection(tunerFilter, PinDirection.Output, 0) as IKsPin;
if (pKsPin != null)
{
IntPtr raw;
reply = pKsPin.KsQueryMediums(out raw);
DsError.ThrowExceptionForHR(reply);
try
{
RegPinMedium rpm;
IntPtr addr = new IntPtr(raw.ToInt32() + 8);
rpm = (RegPinMedium)Marshal.PtrToStructure(addr, typeof(RegPinMedium));
return((int)rpm.dw1);
}
finally
{
if (IntPtr.Zero != raw)
{
Marshal.FreeCoTaskMem(raw);
}
}
}
return(-1);
}
private void DumpPinMediumTest()
{
int hr;
IntPtr ip = IntPtr.Zero;
IKsPin pKsPin = m_IPinOut as IKsPin;
KSMultipleItem pmi = new KSMultipleItem();
// KsQueryMediums returns a KSMultipleItem immediately followed by
// KSMultipleItem.Count instances of PinMedium
hr = pKsPin.KsQueryMediums(out ip);
Marshal.ThrowExceptionForHR(hr);
try
{
// Read the KSMultipleItem
Marshal.PtrToStructure(ip, pmi);
Debug.Assert(pmi.Count > 0, "Medium count");
if (pmi.Count > 0)
{
RegPinMedium pTemp = new RegPinMedium();
ip = (IntPtr)(ip.ToInt32() + Marshal.SizeOf(typeof(KSMultipleItem)));
for (int i = 0; i < pmi.Count; i++)
{
// Read the PinMedium
Marshal.PtrToStructure(ip, pTemp);
Debug.WriteLine(string.Format("{0} ({1}) ({2})", pTemp.clsMedium, pTemp.dw1, pTemp.dw2));
}
}
}
finally
{
Marshal.FreeCoTaskMem(ip);
}
}