465     IMFMediaSession *ig_pSession;  member in __anon2599bf920111::ImageGrabber
1215     ig_pSession(NULL),  in ImageGrabber()
1221     if (ig_pSession)  in ~ImageGrabber()
1223         ig_pSession->Shutdown();  in ~ImageGrabber()
1234     SafeRelease(&ig_pSession);  in ~ImageGrabber()
1400     if (ig_pSession)  in initImageGrabber()
1402         ig_pSession->Shutdown();  in initImageGrabber()
1404     SafeRelease(&ig_pSession);  in initImageGrabber()
1450     CHECK_HR(hr = MFCreateMediaSession(NULL, &ig_pSession));  in initImageGrabber()
1457         if (ig_pSession)  in initImageGrabber()
1459             ig_pSession->Shutdown();  in initImageGrabber()
1461         SafeRelease(&ig_pSession);  in initImageGrabber()
1469     if(ig_pSession)  in stopGrabbing()
1470         ig_pSession->Stop();  in stopGrabbing()
1478     HRESULT hr = ig_pSession->SetTopology(0, ig_pTopology);  in startGrabbing()
1480     hr = ig_pSession->Start(&GUID_NULL, &var);  in startGrabbing()
1486         if(!ig_pSession) break;  in startGrabbing()
1487         hr = ig_pSession->GetEvent(0, &pEvent);  in startGrabbing()
1508             ig_pSession->Stop();  in startGrabbing()