I think it's both. libplayback sounds like an internal API to me. It's not documented, and the official response is essentially "go reverse engineer it".

When Windows had APIs that only MS products knew how to use, MS got sued for abusing its monopoly. This is bad corporate behavior. If Nokia is selling a device with an open source OS and if it wants to create a community effort around this product, this kind of action is ... counterproductive.

Whitelisting of community applications is a short-term kludgeThe "pretend you're FMRadio" hack means the community has succeeded in spite of Nokia, but the price of that success is littering the codebase.

I realize I'm being very demanding of Nokia here - it's already open-sourced lots of things, and it's supporting the very forum where I'm writing this message. What I'm saying is that it's falling short of the high standard it's set for itself.