[client/idd] audio: support multiple playback clients

Replace the single-owner PCM queues with one shared LGMP SPMC stream.
Give each admitted client reliable state and an independent playback
cursor, while clients without clock authority resample locally.

Extend the audio protocol with per-client epochs and barriers.
Keep capture exclusive and bound authority backpressure so slow
secondary readers cannot affect the disciplined low-latency path.
This commit is contained in:
Geoffrey McRae
2026-09-05 21:38:50 +10:00
parent 95234cea86
commit 36e170d93a
14 changed files with 3485 additions and 1833 deletions