mediafoundation: Remove COM thread constraints and refactor plugin implementation
mediafoundation: Refactor GstMFSourceObject implementation
* Move CoInitializeEx/CoUninitialize pair into thread function in order to
ensure MTA COM thread
* Move common code to baseclass
mediafoundation: Remove COM thread constraints from GstMFTransform object
Move CoInitializeEx/CoUninitialize pair into our dedicated thread so that
we can ensure COM thread is MTA. This will remove thread constraints
around plugin init.
Edited by Seungha Yang