Frank Stellmacher 45b9229ceb refactor(queue): thin-state refs as canonical, full Track via resolver (#872)
* refactor(queue): wire queue UI to the track resolver (thin-state phase 3)

cucadmuh's phase-3 steps:
- Selectors (useQueueTracks) read resolver-first: getCachedTrack → queue: Track[]
  fallback (until phase 4), F4 star/rating overrides merged on read.
- QueueList rows source their track from the resolver (queue fallback); rows show
  title/artist/duration only, so no override merge there.
- pendingStarSync star/rating success → invalidateQueueResolver so the cache
  reflects the synced value.
- queueResolverBridge re-seeds on queueIndex change too — the prefetch window
  travels with the playing track.

Additive: queue: Track[] stays canonical and behaviour is unchanged (rows
resolve to the same data). Phase 4 drops queue: Track[] and the fallbacks.

* docs(changelog): queue panel reads through track cache (#860)

* fix(queue): stop a render loop that froze the UI on long queues

A long virtualized queue + a track change could lock the WebView for ~2 min:
- useVirtualizer was handed a fresh `initialRect` object literal every render, so
  it kept re-initializing in a loop. Hoisted it to a stable module constant.
- getCachedTrack did an LRU bump (Map delete+set) during render — a render-time
  side effect. Made it a pure read; recency is set at write time in cacheSet.

* perf(mobile): virtualize the mobile player queue drawer

The mobile now-playing queue drawer rendered the full queue with .map; a
multi-thousand-track queue meant thousands of DOM nodes. Virtualize it with
@tanstack/react-virtual (uniform rows, stable initialRect) so the DOM stays at
O(visible rows), matching the desktop QueuePanel. Active track is centred on open
via scrollToIndex.

* perf(mini): virtualize the mini-player queue list

The mini-player queue rendered the full MiniSyncPayload queue with .map.
Virtualize it against the OverlayScrollArea viewport (stable initialRect) so the
mini window's DOM stays at O(visible rows). Drag-reorder is preserved: rows keep
data-mq-idx alongside the virtualizer's measureElement.

* refactor(queue): add resolveQueueTrack/getQueueTracksView helper (thin-state phase 4)

Render-safe ref→Track view for the phase-4 consumer migration off queue: Track[].
Resolver cache → caller fallback (legacy queue[idx] during dual-write) →
placeholder; ref queue-only flags carried, F4 overrides merged. Pure synchronous
read, no cache mutation (the freeze landmine), so it is safe in render.

* refactor(queue): keep queueItems as the canonical in-memory mirror (thin-state phase 4)

Step 1b: dual-write the thin queueItems ref list at every queue write site
(the 11 mutations, next/radio top-up, playTrack, undo/redo restore, instant-mix,
radio, server-queue init, lucky-mix rollback, and hydrate) so it tracks
queue: Track[] in memory, not only at persist time. Identity-preserving maps
(star/rating overrides) keep the same refs and are intentionally left untouched.

Resolves the restore double-role flagged for 1b: queueItemsIndex is now the
restore-pending sentinel that gates hydrateQueueFromIndex, while queueItems
stays canonical -- rebuilt from the whole queue after a full hydrate instead of
cleared. Normal mutations never set the sentinel, so it only fires on a fresh
cold-start restore, not on later server switches.

No behaviour change; queue: Track[] stays the source consumers read until
phase 3. tsc + full vitest suite (1119 tests) green.

* refactor(queue): mobile queue drawer reads through the track resolver (thin-state phase 4)

Step 2: the mobile now-playing queue drawer resolves each row's track from the
resolver cache (→ queue: Track[] fallback until phase 4), matching the desktop
QueueList wired in the phase-3 commit. Subscribes to the resolver version so
rows re-render as the cache fills. Structure (count, order, keys, the playTrack
arg) still comes from queue: Track[] until it is dropped in the final step.

The mobile drawer was the last queue display surface still reading track
metadata straight off the fat queue. tsc + full vitest suite green.

* refactor(queue): ref-native queue mutations + dual-write bridge (thin-state phase 4)

Step 3a: the 11 queueMutationActions now splice/filter/reorder QueueItemRef[]
(matching by trackId + the ref's queue-only flags) instead of Track[].
`bridgeQueueFromItems` rebuilds the dual-written queue: Track[] from the new
refs by id — purely structural (no resolver/override merge), so behaviour is
byte-identical and playerStore.queue.test.ts stays unchanged green. The working
ref list comes from `itemsOf(state)` (derived from queue: Track[] for now); the
final step swaps that one line to state.queueItems once the fat queue is gone.

enqueue / enqueueAt / enqueueRadio seed the resolver cache with incoming tracks
(seed-before-splice) so they resolve without a network round-trip after the fat
queue is dropped. Adds a DEV-only id-parity guardrail (queue vs queueItems);
dev-runtime only, silent in vitest and prod.

tsc + full vitest suite (1119) green; contract test unchanged.

* refactor(queue): ref-native radio/infinite top-ups (thin-state phase 4)

Step 3b: nextAction's proactive infinite-queue and radio top-ups build the new
queue as QueueItemRef[] and bridge back to queue: Track[] (same as the queue
mutations), and seed the resolver cache with the freshly fetched tracks so they
resolve without a network round-trip after the fat queue is dropped. The radio
top-up keeps its HISTORY_KEEP front-trim, now expressed on refs.

The exhausted-queue refill paths hand their new queue to playTrack, which keeps
its fat-queue handling until the final step (its no-arg case needs the resolver-
derived queue that lands with the queue: Track[] removal). tsc + full vitest
(1119) green; contract test unchanged.

* refactor(queue): undo snapshots store thin refs, not Track[] (thin-state phase 4)

Step 4: QueueUndoSnapshot.queue: Track[] becomes queueItems: QueueItemRef[],
killing the undo "hidden multiplier" — 32 snapshots of a 50k queue now cost
refs, not 32×50k full tracks. applyQueueHistorySnapshot rebuilds the display
queue from the refs via resolveQueueTrack: resolver cache → the live queue by id
(covers tracks the edit didn't remove) → placeholder. currentTrack stays a full
track in the snapshot and is restored to the engine unchanged.

The snapshot refs derive from queue: Track[] for now (so the undo/redo contract
cases, which seed only `queue`, stay green); the final step swaps that to
[...s.queueItems]. tsc + full vitest suite (1119) green.

* perf(mini): cap the mini-player queue snapshot to ±100 around the current track (thin-state phase 4)

Step 5: the mini bridge no longer serializes the full queue over IPC on every
push — a 50k Artist-Radio queue would otherwise re-encode in full on every track
advance. snapshot() sends a window of 100 tracks before/after the playing song;
queueIndex is made slice-relative. The mini component stays unchanged (slice-
relative); jump/reorder/remove control events are translated back to absolute
queue indices via the window offset captured on the last push.

tsc + full vitest suite (1119) green. Mini bridge has no unit tests — needs a
quick mini-player smoke (queue shows ±100, jump/reorder/remove land correctly).

* refactor(queue): make queueItems a required PlayerState field (thin-state phase 4)

Foundation for the final consumer migration off queue: Track[]: queueItems has
been written at every queue write site since phase 1b, so promoting it from
optional to required is a no-op at runtime (tsc confirms zero new errors) and
lets the upcoming reader migrations read state.queueItems without `?? []` noise.

* refactor(queue): migrate structural queue readers off queue: Track[] (thin-state phase 4)

First reader batch toward dropping queue: Track[]: the queue-length selectors
(usePlaybackServerId, usePlaybackCoverArt, useQueuePanelDrag, useMiniQueueDrag)
now read state.queueItems.length, and FullscreenPlayer's next-track cover prefetch
resolves through useQueueTrackAt instead of indexing the fat queue. All behaviour-
identical during dual-write (queueItems is in lockstep with queue). tsc + full
vitest suite (1119) green.

Note: getPlaybackServerId() (playbackServer.ts) deliberately stays on queue for
now — it is called from many partially-mocked test stores, so it migrates with
the final field removal where the seedQueue helper covers those tests.

* refactor(queue): QueuePanel save/share/playlist read queueItems (thin-state phase 4)

The id/length reads (save to playlist, share link, create playlist, empty-queue
guards, next-tracks divider) now read state.queueItems instead of the fat queue.
Behaviour-identical during dual-write; queue: Track[] stays for the rendered
QueueList + auto-scroll until the field is dropped. tsc + full suite (1119) green.

* refactor(queue): drop queue: Track[] — thin queueItems is the only queue (thin-state phase 4)

The store no longer holds the fat queue. `queueItems: QueueItemRef[]` is the sole
canonical queue; full `Track`s resolve on demand via the resolver (index batch →
getSong fallback, bounded LRU cache); only `currentTrack` stays a full Track. At
50k tracks the store holds ~hundreds of resolved tracks + the refs, not 50k Track
objects.

- **Persist:** partialize is refs-only (no windowed slice / PERSIST_QUEUE_HALF).
  A `merge` migrates every historical blob shape → `queueItems` (existing
  `queueItems` → legacy `queueRefs` → pre-ref windowed `queue: Track[]`) and drops
  the obsolete `queue` key, so saved queues survive the upgrade.
- **Restore (decision B):** `hydrateQueueFromIndex` eager-resolves the whole
  ref list into the cache on cold start (index → getSong, so an index-off queue
  still plays), clears the restore sentinel.
- **Resolver bridge:** keeps `[idx-50, idx+200]` warm via `resolveVisibleRange`.
- **Mutations / actions / playback:** operate on refs; the playing track is
  `currentTrack`, the next/neighbour tracks resolve from the cache. Navigation
  (next/previous/row-jump) keeps `queueItems` and only moves the index — no full
  resolve or queue rebuild per track change.
- **Persist tests** cover the three old-blob migrations; `seedQueue` test helper
  replaces the `setState({ queue })` seeds.

tsc + full vitest suite (1115) green. Behaviour-preserving by the test contract;
the gapless track change + cold-start restore + mini cap still want a live smoke
before merge.

* fix(queue): star/rating keeps the queue row resolved instead of blanking to "…" (thin-state)

Rating/starring a queue song flashed the row's title to the "…" placeholder
until the next track change. Root cause: on sync success pendingStarSync called
invalidateQueueResolver, which DROPPED the cached track — and with queue: Track[]
gone there's no fat fallback, so the row resolved to a placeholder until the
resolver bridge re-fetched the window.

Fix: add patchCachedTrack(trackId, patch) and use it on star/rating success to
update the cached entry in place (title kept, synced starred/userRating applied)
instead of dropping it. No placeholder flash, no re-fetch.

tsc + full vitest suite (1115) green.

* fix(player): quota-safe persist so a full localStorage can't kill playback

A very large queue (~50k refs) overflows the localStorage quota; the persist
write then threw QuotaExceededError from inside set(), which aborted playTrack
before audio_play — no audio output at all. Back the player persist with a
quota-safe storage wrapper so a failed write degrades to a no-op instead of
throwing. Restoring the full ref list at that ceiling (vs a windowed cap) is
left as a follow-up.

* polish(player): throttle the quota-skip persist warning to once per key

The quota-safe persist logs a skip on every failed write; on a huge queue that
floods the dev console once per mutation. Warn once per key per quota-exceeded
streak, re-armed when a write to that key next succeeds.

* fix(queue): port new cover-pipeline readers to thin-state

Main's cover pipeline (#870) reads s.queue.length and seeds the player
store with queue: [track] in its tests. Under thin-state, queue: Track[]
no longer exists — the canonical queue is queueItems: QueueItemRef[].
These four files were brought across in the merge but still spoke the
old shape; this commit aligns them with the thin-state contract.

- src/cover/usePlaybackCoverArt: queueLength = queueItems.length
- src/cover/usePlaybackCoverArt.test: seed via toQueueItemRefs
- src/api/coverCache.test: same
- src/hooks/useNowPlayingPrewarm.test: same (two test cases)

* fix(queue): canonicalize thin-state server identity for mixed-server queues

`QueueItemRef.serverId` and `PlayerState.queueServerId` are now written as
the URL-derived index key on every writer path, matching the library index
direction. Mixed-server queues with duplicate `trackId` across servers stay
unambiguous because the resolver cache, persistence, and playback bindings
all share one key shape.

- new `canonicalQueueServerKey()` helper (idempotent UUID-or-key normalizer)
- `toQueueItemRefs`, `bindQueueServerForPlayback`, `seedQueueResolver`, and
  `hydrateQueueFromIndex` emit canonical keys
- `getCachedTrack` falls back to the canonical lookup so refs persisted in
  the legacy UUID shape still resolve through the migration window
- persist `merge` rewrites `queueServerId` and every ref `serverId` on
  rehydrate, so the live store never holds mixed shapes
- `removeServer` compares against the resolved id so a profile delete still
  clears the matching queue binding
- the two `playbackServer.test.ts` asserts that hard-coded the UUID shape
  are updated to the canonical key (existing reader-tolerance is unchanged)

* fix(queue-undo): bind snapshot prepend to snapshot-canonical server identity

When `applyQueueHistorySnapshot` has to prepend the still-playing track
(the snapshot's queue does not contain it), the new ref must follow the
snapshot's playback server, not the live `queueServerId`. A server switch
racing the undo would otherwise stamp the prepended ref with the new
server, mis-resolving the playing track on the very next render.

- `QueueUndoSnapshot` now carries `queueServerId` (captured by
  `queueUndoSnapshotFromState`); older in-memory entries fall back through
  the snapshot's own refs and finally the live store value
- the prepend in `applyQueueHistorySnapshot` plus the post-restore
  `seedQueueResolver` both source the server identity from this snapshot
  context, run through `canonicalQueueServerKey` so cache bucket and ref
  shape stay in lockstep

* test(queue): regression cluster for mixed-server queues with duplicate trackId

Covers the four invariants the thin-state review called out:

- resolver correctness: same `trackId` on two servers maps to two distinct
  cache entries via canonical keys, and legacy UUID-shaped refs still read
  the same entries through the compat lookup path
- restore/hydrate: persist `merge` forward-migrates UUID-form blobs in
  three shapes (canonical `queueItems`, legacy `queueRefs`, mixed-server
  `queueItems`) to canonical keys
- undo snapshot application: prepended ref follows the snapshot's playback
  server even when the live queue has been rebound to a different one,
  with fallback to snapshot refs and live state for legacy entries
- queue sync id emission: `flushPlayQueuePosition` -> `savePlayQueue`
  passes plain track ids and the playback server out of band, no per-ref
  `serverId` ever leaks into the request body

Also asserts the write helpers (`toQueueItemRefs`,
`bindQueueServerForPlayback`) emit canonical keys directly.

* perf(queue-header): coalesce resolver burst updates and aggregate in one pass

`QueueHeader` recomputed total and remaining queue durations on every
resolver cache version bump via two separate full-queue reduces. A mass
resolve burst (queue restore, prefetch window slide) bumps the version
dozens of times in one frame, and very long queues turned that into
visible main-thread stutter.

- one pass: a single for-loop produces both total and future-tracks
  duration; a 50k-track queue costs one walk per recompute, not two
- `useDeferredValue(version)` coalesces the burst into a single
  low-priority commit so the cache version is only sampled once per
  React frame instead of once per cache write

* fix(queue): use stable artist seed for radio top-up

The proactive radio top-up in `runNext` seeded `getSimilarSongs2` and
`getTopSongs` from `resolveQueueTrack(nextRef)` metadata. When the next
ref is still cold in the resolver cache, the placeholder track has empty
artist fields, and the top-up would fire `getSimilarSongs2('')` -- silently
returning nothing and leaving the queue dry just before the radio rail
would have refilled.

- prefer the just-played `currentTrack` (always fully resolved in the
  player store) and the stored radio seed artist id
- fall back to the next-track metadata only when those are missing
- skip the top-up entirely when no stable seed is available, instead of
  emitting a non-deterministic empty request

* docs(changelog): queue mixed-server routing and quota-safe persist (#872)
2026-05-27 00:10:34 +02:00
2026-05-07 13:11:22 +02:00

Psysonic Logo

A modern desktop client for self-hosted music libraries

Fast. Native. Beautiful. Built for people who actually care about their music collection.

Psysonic is built primarily for Navidrome and also works with Gonic, Airsonic, LMS and other Subsonic-compatible servers, depending on the features supported by your server.


Latest Release GitHub Stars License GPLv3 Tauri v2

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AUR psysonic AUR psysonic-bin Cachix



Available languages: English, German, Spanish, French, Norwegian Bokmål, Dutch, Romanian, Russian and Chinese.

More translations are added over time.

No telemetry • Native performance • Navidrome-first • Community driven


Psysonic Screenshot


Warning

Psysonic is under active development. Bugs and rough edges can happen, and features may change as the project evolves.

What is Psysonic?

Psysonic is a desktop music client for self-hosted music libraries. It is designed for people who want the freedom of their own server without giving up the comfort, polish and speed of a modern music app.

It is built with Rust, Tauri v2 and React, with a strong focus on responsiveness, customization, practical music-library workflows and a user interface that does not require a manual before you can press play.

Psysonic is optimized first and foremost for Navidrome. Other Subsonic-compatible servers can work well too, but advanced features may depend on server-side support.


Highlights

Playback & Queue

  • Gapless playback
  • Crossfade
  • ReplayGain support
  • LUFS-based Smart Loudness Normalization
  • AudioMuse-AI support
  • Infinite Queue
  • Smart Radio sessions
  • Fast and responsive playback handling
  • Low memory usage compared to heavy web-first clients

Audio Tools

  • 10-band Equalizer
  • Equalizer presets
  • AutoEQ headphone correction
  • Per-device optimization
  • Loudness-aware playback options

Library Management

  • Fast search across large libraries
  • Albums, artists, tracks and genres
  • Ratings support
  • Multi-select bulk actions
  • Drag & drop playlist management
  • Smart Playlists
  • Built for large self-hosted collections

Lyrics & Discovery

  • Synced lyrics with seek support
  • Lyrics provider support: YouLy+, LRCLIB and NetEase
  • Auto-scrolling sidebar lyrics
  • Fullscreen lyric mode
  • Last.fm scrobbling
  • Similar artists
  • Loved tracks and listening stats

Sharing & Social Listening

  • Magic Strings sharing:

    • share albums, artists and queues
    • Navidrome user management helpers
    • fast account sharing
  • Orbit shared listening sessions:

    • host-controlled synchronized playback
    • session invites via link
    • guest song suggestions
    • real-time queue interaction

Personalization & Accessibility

  • Large theme collection
  • Catppuccin and Nord inspired styles
  • Glassmorphism effects
  • Font customization
  • Zoom controls
  • Keybind remapping
  • Theme Scheduler for automatic day/night switching
  • Colorblind-friendly theme options
  • Keyboard-friendly navigation

Power User Extras

  • CLI controls
  • USB / portable sync
  • Backup and restore settings
  • In-app auto updater
  • LAN / remote auto switching

Shared listening feature banner

Orbit brings synchronized shared listening sessions directly into Psysonic.

Start a session, invite others with a link and listen together with host-controlled playback, shared queue interaction and guest song suggestions. It is built for real-world music sharing without turning your self-hosted setup into a social-media circus.


Platforms

OS Support
Windows Native installer
macOS Signed DMG
Linux AppImage / DEB / RPM / AUR (psysonic, psysonic-bin) / NixOS

Install

Linux

curl -fsSL https://raw.githubusercontent.com/Psychotoxical/psysonic/main/scripts/install.sh | sudo bash

Linux builds are also available through GitHub Releases, AUR and Cachix/Nix.

Windows

Download the latest installer from the GitHub Releases.

macOS

Download the signed DMG from the GitHub Releases.


Development

Contributor expectations (PRs, CI, Tauri boundary, UI): CONTRIBUTING.md.

git clone https://github.com/Psychotoxical/psysonic.git
cd psysonic
npm install
npm run tauri:dev

Build release:

npm run tauri:build

Privacy

Psysonic is built for self-hosted music collections. Your library is yours.

  • No telemetry
  • No spyware nonsense
  • No analytics harvesting
  • No hidden tracking

See TELEMETRY.md for the telemetry stance and PRIVACY.md for how each opt-in integration handles data.


Community & Support

Join the community, report bugs, suggest features, share themes and help shape the future of Psysonic.


License

Psysonic is licensed under the GNU GPL v3.0.


Forks and Attribution

Psysonic is free and open-source software under the GPLv3. You are welcome to fork it, modify it and build upon it under the terms of the license.

If you publish a modified or rebranded version, please make it clear that your project is based on Psysonic and preserve proper attribution to the original project.

That is not about preventing forks. Forks are part of open source. It is about being honest with users and contributors about where the work comes from.

Features, design work and implementation ideas developed in Psysonic should not be presented as unrelated original work in downstream projects.


Own your music. Enjoy the client too.

Psysonic brings a modern desktop experience to self-hosted music libraries.

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