As of this commit, this does not work in my testing environment. More
testing is needed for this one.

This is not yet fully implemented.

This commit is intended to just experiment with the idea and only
supports f32 -> s16 conversions.

The rationale behind this commit is to ensure the size of each data
structure remains consistent regardless of which backends are enabled
and disabled. This is important for mini_al because it publicly exposes
every struct.