2009/12/23 Paul Chitescu paulc@voip.null.ro:
Changelog: qedit: Implement partially the Sample Grabber filter
The IMediaPosition, IMediaSeeking and IQualityControl interfaces are currently not implemented at all. No programs I've tested tried to query them though.
Buffering of samples is also not implemented yet, applications usually install an ISampleGrabberCB callback.
Thread-safety is non-existent in your newly written code. DirectShow uses multiple threads so I would say thread-safety is a requirement, not a nice-to-have.