[PATCH 0/4] MR40: mfplat: Consolidate stream and file IMFByteStream methods

[Nikolay Sivov (@nsivov)]

As far as I can tell disk file case works a bit differently on Windows. It's using dwBytesTransferred, and probably some of OVERLAPPED fields, e.g. EndRead()/EndWrite() will return precisely what's in dwByteTransferred. Unfortunately it's not that straightforward, and some internal bookkeeping is still happening and End* methods can't solely rely on result data. Buy let's ignore that for now, it's not clear of bringing async IO to already async MF reads is worth it.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/40#note_1048