Runtime loader for the prebuilt librockbox_ffi shared library, built on the
Java Foreign Function & Memory API (JEP 454, stable since JDK 22).

Nothing is linked at build time: the library is located at runtime and every
function is bound to a MethodHandle downcall. This mirrors
include/rockbox_ffi.h — keep the descriptors in sync with the C ABI.

The DSP pipeline: EQ, tone, surround, compressor, ReplayGain, resampler.

The underlying dsp_config is a process-wide singleton, so only one DSP handle
may exist at a time and it must be used from one thread. A handle is an opaque
MemorySegment; every function takes it as the first argument. Free it with
`free` (or use `with-dsp`).

Symbolic names for the small-integer enums in the C ABI. Pass either the
keyword (resolved here) or the raw int to the dsp/player functions.

Audio file metadata parsing.

Play an audio file through the real output device.

Run: mise exec -- clojure -M:play [/path/to/audio]

Queue-based player with native ReplayGain and Rockbox crossfade.

A player owns a live audio output device and a background engine thread —
construct it only where an output device exists. A handle is an opaque
MemorySegment; every function takes it as the first argument. Free it with
`free` (or use `with-player`).

ReplayGain `mode` here uses the *player* values (rockbox.ffi.enums/replaygain-mode:
:off :track :album) — distinct from the DSP encoding.

End-to-end smoke test for the Clojure bindings.

Run: mise exec -- clojure -M:smoke