CL-libheif generally repeats the names of functions in libheif with the following modifications:

• heif- prefix is removed.
• The word get is omitted.
• When a function has any user-observable side effects, e.g. it changes some internal state, creates files in a file system etc., it ends with an exclamation point (!).
• If a function is a predicate, -p suffix is added to the name.

Also cl-libheif does not export any functions which create resources which must be explicitly freed later. Instead it exports with- macros with the same functionality which guarantee correct memory management.