Re: [PATCH v2 0/2] MR8402: mf/session: Use a dedicated state when source is shutdown.

[Rémi Bernon]

> And we should get rid of IMFMediaShutdownNotify, I think I missed when it was added. We should not need any custom interfaces to handle this.

IIRC it was required because shutting down the source also shuts down its event queue, it's then not possible for the session to be reliably notified of the shutdown without a dedicated callback. I believe @cmccarthy checked that it's also using a direct callback on Windows.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/8402#note_107607