OnShutdown        390 modules/videoio/src/cap_msmf.cpp     STDMETHODIMP OnShutdown();
OnShutdown        437 modules/videoio/src/cap_msmf.cpp     STDMETHODIMP OnShutdown() { return ImageGrabberCallback::OnShutdown(); }
OnShutdown       1300 modules/videoio/src/cap_msmf.hpp             hr = pSampleCallback->OnShutdown();