This will never appear in Rust code as all forwarding of buffers will
happen at the C/Rust binding layer.

https://github.com/sdroege/rsplugin/issues/7

Keeps the miniobject specific code local and provides a more similar API
to Rc/Arc. Also makes it impossible to accidentially try writing to an
unwritable miniobject.

These are always going to be valid UTF-8 or things are very wrong.

To be used in the demuxer for tracking streams and their related
information.

... and arrays of values in caps while at the same time refactoring the
Value code a bit.

IntoIterator did not work as expected anyway and would require usage of
AsRef, which then breaks type inference for empty slices for example.

stop should only really fail if everything is broken, but we can always
recover somehow here.

Only Speex, AAC and H264 are missing now, which require a little bit
more work.