STDMETHODIMP CStreamSwitcherOutputPin::Notify(IBaseFilter* pSender, Quality q) { CStreamSwitcherInputPin* pIn = (static_cast<CStreamSwitcherFilter*>(m_pFilter))->GetInputPin(); if (!pIn || !pIn->IsConnected()) { return VFW_E_NOT_CONNECTED; } return pIn->PassNotify(q); }