# Changelog

All notable changes to JellyTau are documented here.

Entries are grouped by the capability they change, not by commit. Requirement
IDs in parentheses point at [docs/requirements.md](docs/requirements.md); the
generated trace matrix lives in [docs/traceability.md](docs/traceability.md).

## v0.5.0

### ✨ Features

- **Android video can render on the device's own video surface.** Settings →
  Video Playback → **Native Video** (experimental, off by default) hands
  decoding to ExoPlayer, which draws into a surface composited *behind* a
  transparent WebView, with the player controls layered on top of it.

  The backend had reported "this platform has a native video surface" on Android
  all along, but the frontend threw that answer away in two separate places, so
  the path had never actually run. Both are lifted. The setting can only ever
  *suppress* the backend's choice, never override it upward: turning it off
  forces the web player even where native is available, and turning it on does
  nothing on platforms whose backend never offered it — Linux cannot composite
  behind its webview, so it stays on the web player either way.

  Verified playing on a physical device. Still unverified: the mini-player
  transition, audio-track switching on the native path, and whether hardware
  decoding measurably improves battery or CPU — so the toggle stays off by
  default. (UR-003, UR-004 → DR-150)

### 🐛 Fixes

- **The video surface now reaches the screen at all.** The player built its
  video surface, handed it to ExoPlayer, and then never added it to the view
  hierarchy, because the Activity reference it needed was never supplied — so
  native video would have decoded to a surface nobody could see, whatever else
  was fixed. This also silently disabled picture-in-picture for video, which
  gated on that same never-attached surface. (UR-003, UR-041 → DR-151)

- **Platform playback support is no longer guessed from the browser user
  agent.** The frontend re-derived "does this platform decode audio natively" by
  string-matching `navigator.userAgent` — a second copy of a decision the
  backend already makes, free to drift out of step with the backends it was
  describing. The backend now reports its own capabilities and the frontend
  consumes them. (UR-003, UR-005 → DR-152)

### 🔧 Internal

- **The git tag is now the single source of truth for a release version.** The
  version lived in four files that had to be edited in lockstep, and the release
  workflow rewrote exactly one of them — so a tagged build produced an installer
  named for the tag wrapped around package metadata naming the *previous*
  release, and the Linux job, which had no version step at all, shipped whatever
  happened to be committed. `scripts/set-version.sh` now writes all four from
  one argument and every release job calls it with the tag. The Android
  `versionCode` is derived in the same place, guarded by tests for the property
  that actually matters: it must increase monotonically and stay above the value
  already installed in the field, or Android silently refuses the update.
  (DR-153)

## v0.4.8

### 🐛 Fixes

- **Video with an undecodable soundtrack now transcodes instead of playing
  silent.** Advertising a webview-shaped profile (v0.4.7) turned out not to be
  enough: Jellyfin 10.11.5 enforces a direct-play profile's container and video
  codec but ignores its audio codec, offering an E-AC-3 track for direct play
  against a profile listing only AAC — and no `CodecProfile` or channel limit
  changes that. The client now checks the track it would actually be served
  against what its renderer can decode and forces the h264/AAC HLS transcode
  when it cannot, rather than trusting the negotiation.
  (UR-004 → DR-149)

## v0.4.7

### 🐛 Fixes

- **Video plays with sound on devices that ship a Dolby decoder.** The audio
  codec list sent to Jellyfin came from `MediaCodecList`, which describes
  ExoPlayer — but video does not play through ExoPlayer: it renders in the
  webview `<video>` element, which decodes far less. A phone whose vendor
  licenses Dolby therefore advertised `ac3`/`eac3`, got a direct play, and
  showed full picture with no audio, while a leaner device claimed neither
  codec, received an AAC transcode, and played the same file correctly. The
  video direct-play profile is now narrowed to what the webview can decode;
  audio-only playback is genuinely the native player's and keeps the full list,
  so music is not transcoded needlessly.
  (UR-004 → DR-148)

## v0.4.1

### 🐛 Fixes

- **The lockscreen pause works while a video's audio plays in the background.**
  The handoff starts native audio and only then tears the WebView `<video>`
  down — and that teardown fires a DOM `pause` the frontend reports like any
  other, which left the controller believing webview media was still the
  player. Transport stayed aimed at it: pressing pause on the lockscreen sent a
  control command to a `<video>` that no longer existed while the native player
  carried on, and the element's parting position report dragged the displayed
  time backwards. A handoff is now tracked explicitly, so it hands transport to
  the native backend and ignores what the dying element still reports. A pause
  made from the lockscreen also survives the return to the app, instead of being
  undone by the play state captured when the handoff began.
  (UR-040, UR-005 → DR-052, DR-097)

## v0.4.0

### ✨ Features

- **Favourites, across libraries.** A `/library/favorites` page renders
  favourites from every library with All / Movies / Shows / Music scope tabs,
  reusing the standard grid so card shape still follows the media — a mixed All
  tab reads as posters, squares and thumbnails side by side. Home carries
  favourite rows below Recently Added, and a row with no items does not render
  at all, so a fresh install shows no empty rows. Server favourite state is
  mirrored into the local database as results are cached, so offline browsing
  sees the same favourites as the server; a toggle made offline is never
  overwritten by a stale server value before it has been pushed.
  (UR-067, UR-069 → DR-113, DR-114, DR-115, DR-117, DR-118)

- **Search answers from the local index.** The instant leg read only downloaded
  items, so with no downloads it returned nothing and every keystroke fell
  through to a full `Recursive=true` server query. It now reads the whole synced
  catalog through the same availability CTE `get_items` uses, gated on the same
  `include_catalog_browse` flag, so search and browse cannot diverge. The index
  also gained MusicArtist, Playlist and People — the very groups search sorts
  results into. Re-indexing moved from a frontend startup call to a Rust
  background task with a 6h TTL, so a long session no longer searches a stale
  catalog. (UR-065 → DR-108, DR-110, DR-111)

### 🐛 Fixes

- **Playback no longer restarts an episode at random on a flaky connection.**
  Background audio-only playback of a video streams a progressive mp3 transcode
  over plain HTTP, which is chunked and so declares no length: when the
  connection dropped mid-episode, ExoPlayer saw end-of-input and reported
  `STATE_ENDED`, indistinguishable from the real end. The app ran its
  end-of-episode logic mid-episode and playback parked in `STATE_ENDED`, where
  the next play intent from the lockscreen, notification or a Bluetooth
  reconnect seeks an ended player to position 0 — surfacing as "the episode
  randomly restarted". The item's runtime is now what decides: an end reported
  well short of it re-opens the stream where it stopped. (UR-040 → DR-129)

- **A network hiccup no longer kills playback outright.** Music and video
  declare a length, so a cut connection reaches them as an *error* rather than a
  phantom end — and every error stopped the player. A recoverable error now gets
  one bounded attempt at re-opening the stream where it stopped, with a growing
  backoff, leaving the rest of the queue intact. On Linux, MPV additionally
  reconnects inside the demuxer so ordinary blips never surface at all, and
  `EndFile(ERROR)` — previously a bare log line that left playback halted while
  the UI still showed "playing" — is now reported and recovered.
  (UR-004, UR-040 → DR-129, DR-130)

- **The player no longer reads 0:00 as a track ends on Linux.** MPV exposes
  `time-pos` and `duration` as properties of the *loaded* file, so at EOF it
  unloads and both stop resolving — reporting zero at exactly the moment
  end-of-file handling asks where playback reached. The last reading seen while
  media was loaded is now kept and used as the fallback. (UR-005 → DR-130)

- **Server-side deletions propagate to the local catalog.** `DELETE FROM items`
  existed nowhere, so items removed on the server lingered locally forever. A
  post-crawl mark-and-sweep now removes them, scoped to crawled types, skipping
  downloaded items, and refusing to run after a partial crawl. Separately,
  `items_fts` grew a full duplicate index on every catalog pass; it is now a
  real upsert, with a migration rebuilding existing indexes. (DR-110)

- **Android system bars and display cutout are handled correctly.** (UR-066)

## v0.2.0

### ✨ Features

- **Audio settings now work on Android.** The equalizer, volume normalization
  and gapless playback controls in Settings › Audio previously rendered on
  Android and did nothing — `ExoPlayerBackend` was the only backend that never
  implemented `set_audio_settings`, and the trait's default silently reported
  success while applying nothing. All three now take effect:
  - **Equalizer** — the canonical 10-band ISO curve is resampled onto whatever
    bands the device's equalizer actually exposes (commonly 5), by nearest
    centre frequency.
  - **Volume normalization** — via `LoudnessEnhancer`. Note this is a gain
    stage, not a true EBU R128 normalizer like the Linux `dynaudnorm` path, so
    it approximates rather than matches Linux behaviour.
  - **Gapless playback** — honours the setting via `pauseAtEndOfMediaItems`
    (ExoPlayer is gapless by default, so this disables it when you turn it off).

  The effects re-attach automatically when ExoPlayer rebuilds its audio sink on
  a format change, so the equalizer no longer stops applying part-way through a
  queue. (UR-027, UR-032, UR-033 → DR-030, DR-035, DR-036, IR-004)

  ⚠️ **Not yet verified on a physical device.** `AudioEffect` availability and
  band layouts vary by device and OEM ROM; where an effect is unavailable it is
  logged and skipped rather than crashing playback.

### 📋 Documentation

- **Playback backend unification investigation.** Six new specs in
  [docs/specs/](docs/specs/) record why the playback backends cannot be unified
  onto a single engine: every candidate (mpv, GStreamer, libVLC) fails the same
  webview-compositing constraint, because WebKitGTK/WebView2/Android WebView each
  own their compositor surface and native video cannot interleave with HTML.
  Audio *can* unify; video cannot. Also specifies the Android native-video spike,
  a Windows native audio backend, and the `libmpv2` migration.

### 🐛 Corrected requirement statuses

These were documented as working and were not. No behaviour changed — the docs
were wrong.

- **Crossfade (UR-031, DR-034) was marked "Done (Linux only)". It is implemented
  nowhere**, and is architecturally blocked on mpv: its audio chain is
  single-stream, and FFmpeg's `acrossfade` requires two inputs. Real crossfade
  would need two libmpv instances.
- The platform parity matrix listed crossfade as a Linux/Android gap (it is
  neither) and omitted the equalizer (which was a genuine gap, now closed).
- `nativeAdapter.ts` cited tauri#10152 as blocking native Android video. That
  issue is a stale feature request; the capability shipped in September 2024.
  What remains unproven is SurfaceView-behind-WebView compositing, now tracked
  by a spec rather than asserted as an upstream blocker.

<!--
  Note: v0.1.3–v0.1.5 have no entries here. Their changes are in the git log
  and docs/traceability.md.
-->

## v0.1.2

### ✨ Features

- **Search results are ordered by how well they match.** A name that *starts*
  with the query now outranks one matching mid-word — typing "parks" finds
  "Parks and Recreation" before "Sparks of Love" — and at equal match quality a
  container outranks its contents, so a series lands above its own episodes.
  Ranking is applied to the instant cached results and to the merged
  cache+server list alike, so the list no longer reshuffles when server results
  arrive. (UR-060, DR-090)
- **Separate Shows, Episodes and People result groups.** The combined "TV Shows"
  group splits into Shows and Episodes so a show never competes with its own
  episodes for a slot, and a new People group means searching an actor's name
  reaches their bio page. Default order is Shows → Episodes → Movies → Songs →
  Albums → Artists → People; a group order saved before the split keeps the
  position it was dragged to. (UR-060, DR-091)

### 🐛 Bug Fixes

- **The library header search bar works on every library page.** It previously
  searched in place and depended on `/library` rendering results inline, so on
  any other `/library/**` route the results were fetched and never shown.
  `/search` is now the single surface that renders results, and the header bar
  hands its query and scope over via the URL. (UR-049, DR-063)
- **Video smaller than the window is scaled up to fit.** Sizing only ever shrank
  oversized media, so a 480p source on a 1080p display played as a small picture
  in the middle of a black frame. The picture now fits whichever axis constrains
  it, in both directions, preserving aspect ratio. (UR-005)

### 📋 Requirements

**Linux:** 64-bit, GLIBC 2.29+
**Android:** 8.0+

## v0.1.1 and earlier

Released before this file existed — see the git history and the release notes on
each tag.
