Auralis 2.0.0: UPnP/DLNA media server, OpenHome/UPnP AV renderer zones, playback + UI fixes

[QrowZK]

Auralis goes 2.0: full network audio in both directions, plus the round of playback and UI fixes from rig testing. Supersedes #8 (same content, now versioned 2.0.0).

Network audio — serve

(Settings → Media Server)

• UPnP/DLNA media server with real SSDP presence (NOTIFY heartbeats + M-SEARCH responder, persistent device UUID). Any streamer on the LAN sees "Auralis" as a browsable library.
• ContentDirectory tree: Albums / Artists / Genres / All Tracks / Playlists — smart playlists included, snapshots pushed from the UI so the rules engine stays in one place.
• Audiophile-grade serving: DIDL-Lite with sampleFrequency, bitsPerSample, duration, album art; Range-capable streaming with DLNA contentFeatures/transferMode headers; files go out bit-for-bit untouched — no transcoding, ever.
• Configurable name + port; auto-resumes on app start.

Network audio — drive

(Settings → Output Engine → Network Renderer)

• Discover UPnP AV and OpenHome renderers (WiiM, Linn, Lumin, Cambridge, Volumio, …) and use one as Auralis's output zone: transport, seek, volume, queue, shuffle, smart playlists — the whole UI drives the streamer.
• Gapless via SetNextAVTransportURI (UPnP AV) or playlist Insert (OpenHome), with track-advance detection (TrackURI match / position-wrap with a seek-to-zero guard).
• Signal path honesty: source → HTTP serve (bit-perfect) → renderer; DSP controls no-op past the network boundary.
• Offline renderer at boot falls back to standard output with a toast; engine switches fully release the departing device.

Playback & UI fixes

• Queue auto-advance stall (native engine): the decoder's final sub-frame tail blocked the advance check forever — the native path never moved to the next queue entry. Tail is now flushed as a zero-padded final frame (PCM + DSD). Verified by drain simulation.
• Bit-perfect toggle static / broken volume / frozen meters (carried from post-Auralis 1.5.0: signal path, SoX resampling + dither, IR convolution, WASAPI exclusive + DoP, smart playlists + ratings #6 rig testing): stream reopens when the processing mode changes even if the wire format matches; meters blank instead of freezing.
• Sticky glow ring on transport buttons: buttons blur after real mouse clicks; keyboard focus keeps its ring.
• Lyrics sync drift: auto-scroll geometry fixed (position: relative on the scroll container so offsetTop resolves correctly); LRC [offset:±ms] honored; stale highlight cleared on back-seek; auto-scroll yields for 3.5 s after manual scrolling.

Verification

• Mock-renderer suite, 24 assertions: AV + OpenHome command ordering, gapless advance, natural end, seek-wrap guard, pause/resume/volume.
• Full-stack Xvfb run: a mock streamer with real SSDP presence was discovered in the settings UI and pulled FLAC from the media server (HTTP 206, audio/flac, DLNA headers) while the player bar tracked its reported position.
• Auto-advance drain simulation (7 assertions) and a live lyrics screenshot with the correctly-stamped line highlighted.
• Remaining test only you can run: a real streamer on your network.

🤖 Generated with Claude Code

https://claude.ai/code/session_0125mBkda6C4Yv2CiekXA6uW

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Generated by Claude Code