SampleGrabberCallback  409 modules/videoio/src/cap_dshow.cpp class SampleGrabberCallback;
SampleGrabberCallback  453 modules/videoio/src/cap_dshow.cpp         SampleGrabberCallback * sgCallback;
SampleGrabberCallback  765 modules/videoio/src/cap_dshow.cpp      sgCallback           = new SampleGrabberCallback();