# radieo

A personal music radio: an always-on HTTP audio stream, automatically fed from
several sources and broadcast with [Liquidsoap](https://www.liquidsoap.info/).

The goal is a hassle-free stream that always has something playing, where the
next track is picked automatically. It is meant for personal use (a couple of
simultaneous listeners), not for public broadcasting.

## How it works

radieo is built as two layers, each running in its own Docker container and
sharing a cache volume:

- **`ingest`** (Python) — the brain. It decides what to play next, resolves and
  downloads tracks into a local cache, keeps a pre-filled queue, and exposes the
  next track over HTTP at `GET /next`. *(currently it only serves the cache
  directory; the download providers come in later milestones — see roadmap)*
- **`stream`** (Liquidsoap) — deliberately dumb. It pulls the next track from
  the `ingest` daemon, broadcasts the audio over HTTP, and never goes silent
  thanks to a local cache fallback.

Playback sources (planned): a [Navidrome](https://www.navidrome.org/) library
via the OpenSubsonic API, arbitrary tracks fetched with
[yt-dlp](https://github.com/yt-dlp/yt-dlp) (Bandcamp, SoundCloud, YouTube…), and
listening suggestions from a ListenBrainz RSS feed.

## Usage

Requirements: Docker with Compose v2.

```sh
# Drop some .mp3 files into the cache directory
cp /path/to/music/*.mp3 cache/

# Build and start the stream
docker compose up -d

# Listen (VLC, a browser, any audio player)
#   http://localhost:8000/radio.mp3
```

Stop it with `docker compose down`.

The stream is MP3 at 192 kbps. Multiple clients can listen at the same time.
New files dropped into `cache/` are picked up automatically (the playlist is
reloaded when the directory changes).

## Configuration

Copy `.env.example` to `.env` and fill in your Navidrome details:

```sh
cp .env.example .env
# edit .env: RADIEO_NAVIDROME_URL / USER / PASSWORD / PLAYLIST
```

If the Navidrome variables are left empty, the source is simply disabled and
the stream plays whatever is already in `cache/` (the milestone-1/2 behaviour).

## Current status

**Milestone 3 — Navidrome provider: done.**

- `ingest` pulls tracks from an OpenSubsonic playlist (Navidrome), downloading
  them into the shared cache ahead of playback (prefetch buffer).
- Play history and LRU retention are tracked in a SQLite database under
  `state/`: only the N most recently played files are kept on disk
  (`RADIEO_RETENTION_KEEP`, default 20); anti-repeat avoids replaying a track
  seen among the last plays.
- `GET /next` returns the next track as an annotated Liquidsoap URI with real
  title/artist metadata (or an empty body when nothing is ready).
- `stream` (Liquidsoap v2.4.5) pulls via `request.dynamic` and falls back to the
  local `cache/` directory; `mksafe` guarantees silence rather than a crash.
- HTTP stream served at `http://localhost:8000/radio.mp3` (MP3, 192 kbps),
  multiple simultaneous listeners supported.

The yt-dlp and ListenBrainz sources come next.

## Roadmap

1. ✅ **Broadcasting skeleton** — Liquidsoap serving the cache directory.
2. ✅ **Ingestion daemon** — Python daemon exposing `GET /next`; Liquidsoap
   switches to a `request.dynamic` source with the cache as fallback.
3. ✅ **Navidrome provider** — play from an OpenSubsonic playlist, with caching,
   LRU retention and play history.
4. **yt-dlp provider** — fetch tracks from a maintained URL/artist list; weighted
   mixing between sources.
5. **Canonicalizer** — ListenBrainz MBID lookup for source-agnostic
   de-duplication.
6. **ListenBrainz provider** — parse the RSS suggestions feed and resolve each
   one to Navidrome or yt-dlp.
7. **Polish** — crossfade, robustness, optional web player, config file.