// disconnect all connected audio out pins and remove unused filters
private void StripSplitter(IGraphBuilder pGraphBuilder)
{
if (_splitterFilter != null)
{
IPin pPin = null;
int nSkip = 0;
while ((pPin = DsUtils.GetPin(_splitterFilter, PinDirection.Output, true, nSkip)) != null)
{
if (DsUtils.IsMediaTypeSupported(pPin, MediaType.Audio) == 0 ||
DsUtils.IsMediaTypeSupported(pPin, MediaType.Subtitle) == 0)
{
// this connected pin supports audio or subpicture type!
DsUtils.Disconnect(pGraphBuilder, pPin);
}
else
{
nSkip++;
}
Marshal.ReleaseComObject(pPin);
} // end of while
DsUtils.RemoveRedundantFilters(_sourceFilter, pGraphBuilder);
}
}
public IPin GetInputPin()
{
IPin pPin = null;
if (BaseFilter != null)
{
// try unconnected pins first
pPin = DsUtils.GetPin(BaseFilter, PinDirection.Input);
if (pPin == null)
{
// let's try connected pins
if ((pPin = DsUtils.GetPin(BaseFilter, PinDirection.Input, true)) != null)
{
DsUtils.Disconnect(GraphBuilder, pPin);
}
}
}
return(pPin);
}
private bool GetPins(out IPin rendererInputPin, out IPin decoderOutPin)
{
bool bRet = false;
rendererInputPin = decoderOutPin = null;
if (BaseFilter != null && (rendererInputPin = DsUtils.GetPin(BaseFilter, PinDirection.Input, true)) != null)
{
int hr = rendererInputPin.ConnectedTo(out decoderOutPin);
if (hr == DsHlp.S_OK)
{
DsUtils.Disconnect(GraphBuilder, rendererInputPin);
bRet = true;
}
else
{
Marshal.ReleaseComObject(rendererInputPin);
rendererInputPin = null;
}
}
return(bRet);
}
