psysonic

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Psychotoxical 7a61d50c42 refactor(audio): extract source selection from audio_play

Pull the ~300 LOC URL → PlayInput dispatch out of audio_play into a
new audio/play_input.rs:
- PlayInput enum (Bytes / SeekableMedia / Streaming)
- PlayInputContext struct holding the precomputed inputs (url, gen,
  duration_hint, format/cache hints, optional reused chained bytes)
- select_play_input() async — handles all four branches: reused
  chained bytes, psysonic-local://, ranged HTTP with format sniff,
  and the legacy non-seekable streaming fallback
- url_format_hint() — the conservative URL→extension allowlist
  helper, used to be inline in audio_play

audio_play is now focused on the orchestration above the source layer:
ghost-command guard, gapless pre-chain detection, bumping generation,
loudness/replay-gain math, fade-in setup, building the actual rodio
Source pipeline, sink swap with crossfade, spawning progress task.

audio/commands.rs: 980 → 676 LOC. play_input.rs: 385 LOC. Behaviour
preservation hinges on identical analysis-seed spawning, format-hint
fallback chain, range-detection logic, and gen-cancel checks — all
moved verbatim. Smoke test focus: psysonic-local playback, manual skip
during ranged HTTP, format-hint-less servers (legacy fallback path),
preload cache hit replay, manual skip onto pre-chained track.

2026-05-08 15:15:30 +02:00