Moin,
could you be a bit more specific? You say that you "are writing" a software platform, so you have started the project, picked the tools and know where you're heading. The question "best way to accomplish such task" doesn't look like it makes much sense in that context.
You say that you picked MMF SDK - it comes with documentation (see
https://docs.microsoft.com/en-us/windows/win32/medfound/media-foundation-functions for example) and sample code that gets you started, including access to media stream data in memory.
If you are looking for a complete codebase that you can copy and paste into your project, GitHub probably is the best source for that. But that might mean that you have to go back on your project layout and change ingredients based on what the repository you clone from is using.
Marc Albrecht
