[PATCH v8 0/3] MR10306: mfmediaengine: Implement looping behaviour.

[Brendan McGrath (＠redmcg)]

When `IMFMediaEngine::SetLoop(TRUE)` is called, media engine will repeatedly loop the video.

--
  v8: mfmediaengine: Keep the last presentation sample on flush.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10306