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v2.6.1 — chained Ogg-Opus + transcoder flap survival

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@DatanoiseTV DatanoiseTV released this 12 May 21:02
· 26 commits to main since this release
v2.6.1
88f782e

Three-layer fix for the long-running auto-transcoder failure on robodj-style sources that rotate their Ogg logical stream between tracks. Pure Go end-to-end (no CGO introduced).

Fixed

  • Chained Ogg-Opus decoder. Replaced kazzmir/opus-go's PacketReader (which pins the bitstream serial on first page and errors out on every new BOS) with a small pure-Go Ogg page reader that handles RFC 3533 §3 chained logical streams transparently. Each BOS resets the per-stream state (channels, preskip) and re-initialises the decoder; audio decoding is continuous across track-boundary rotations.
  • Codec swap to libopus-transpiled, lenient with real-world packets. Initial cut used pion/opus for the codec. Strict RFC 6716 validation rejected several real-world packets per minute (code-1 even-payload, ≤120 ms duration, VBR overrun, CBR divisibility) — each reject was a silent ~20 ms gap audible as a skip. Switched to kazzmir/opus-go's codec, which is libopus transpiled to pure Go via ccgo (no cgo) and matches reference-C tolerance. pion/opus dropped from go.mod.
  • Transcoded outputs survive source flaps. HealthMonitor.check skips auto-remove for streams flagged IsTranscoded. A brief upstream disconnect (8-36 s is routine for robodj) no longer turns into an end-to-end outage with the player hitting 404 and giving up.
  • No stale audio burst on source-resume. New Stream.FlushAtHead bumps a per-stream flush generation, wakes every listener, and snaps MinListenerOffset to the current buffer head. Listeners (existing and any auto-reconnecting subscribers) skip the stale buffered MP3 from before the gap and pick up at the live edge.
  • Stalled-pump watchdog kept as a safety net (extended 8 s → 30 s) — chain rotation no longer triggers it, so it only fires on a genuine decoder hang.

Upgrade notes

Drop-in. No config changes, no public API changes.

Full changelog: https://github.com/DatanoiseTV/tinyice/blob/v2.6.1/CHANGELOG.md

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