-- 0068_leveled_stream_cache.up.sql — the size cap of the leveled-stream render
-- cache (Scribe milestone #464, #5001).
--
-- Sonos and other UPnP renderers fetch a track's URL themselves, so the phone
-- cannot level what they play. The server renders a gain-applied FLAC for them
-- instead and keeps it on disk, oldest-used first out once the cache is over
-- this size. An operator setting (rule 25), on the loudness settings row it
-- belongs with.
ALTER TABLE loudness_settings
    ADD COLUMN leveled_cache_mb integer NOT NULL DEFAULT 2048,
    ADD CONSTRAINT loudness_settings_leveled_cache_range
        CHECK (leveled_cache_mb >= 256 AND leveled_cache_mb <= 65536);