Geoffrey McRae 0f3c1db261 [client] usb audio: add asynchronous clock feedback ...

Advertise an asynchronous UAC2 OUT endpoint with explicit feedback so
Windows paces USB audio from the host playback clock.

Drive feedback from measured backend consumption plus the existing
buffer phase controller. Preserve the local and backend resampler paths
for providers without active feedback.

Keep audio diagnostics in the correct clock domains, report ring and
backend latency separately, and avoid hot-path feedback wakeups.

2026-08-10 04:44:55 +10:00

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