[PATCH v2 0/6] MR3528: winegstreamer: Implement windows api frontend for file media sink.

[Ziqing Hui (＠zhui)]

There is a working in progress winegstreamer muxer backend: !3303 
This patch set is the windows api side(frontend) of the muxer stuff.

It will make the patch set too large to submit the backend and frontend together, so I decide to submit the frontend first.

--
  v2: winegstreamer: Add async command handling to media sink.
      winegstreamer: Add IMFClockStateSink stubs to media sink.
      winegstreamer: Implement IMFMediaEventGenerator for media sink.
      winegstreamer: Add IMFMediaTypeHandler stubs to stream sink.
      winegstreamer: Add stubs for stream sink.
      winegstreamer: Add stubs for media sink.

https://gitlab.winehq.org/wine/wine/-/merge_requests/3528