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pmomusic/INSTALL_NOTES.md

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feat: Add PlaylistSource and ResamplingNode for playlist playback This commit implements a new audio source that reads from pmoplaylist and streams tracks continuously, along with a resampling node to normalize sample rates. ## New Components ### PlaylistSource (pmoaudio-ext) - New source in pmoaudio-ext/src/sources/playlist_source.rs - Reads from pmoplaylist ReadHandle - Decodes tracks from audio cache (pmoaudiocache) - Emits PCM with heterogeneous sample_rate and bit_depth - Polls playlist when empty (configurable interval, default 100ms) - Emits TrackBoundary markers between tracks - Graceful shutdown with EndOfStream on stop - Gated behind 'playlist' feature flag **Design Philosophy:** - Keeps each node simple (single responsibility) - Emits raw PCM without format normalization - Pipeline designer chooses how to handle heterogeneity - Ideal for Radio Paradise (homogeneous streams) - Requires ResamplingNode + ToI24Node for mixed playlists ### ResamplingNode (pmoaudio) - Generic resampling node in pmoaudio/src/nodes/resampling_node.rs - Normalizes variable sample rates to a target rate - Uses libsoxr for high-quality resampling - Automatically detects sample rate changes - Recreates resampler as needed - Preserves chunk type (I16/I24/I32/F32/F64) - Quality adapts to bit depth (Medium/High/Very High) ## Architecture PlaylistSource is placed in pmoaudio-ext to avoid circular dependencies: - pmoaudio-ext depends on: pmoaudio, pmoplaylist, pmoaudiocache - No reverse dependencies = clean dependency graph ## Configuration ### pmoaudio-ext/Cargo.toml - Updated 'playlist' feature to include pmoaudiocache, pmocache, pmoflac - Added sources module export ### pmoaudio - Added resampling_node module - Public export: ResamplingNode ## System Requirements ⚠️ **IMPORTANT**: libsoxr-dev must be installed for compilation See INSTALL_NOTES.md for installation instructions per platform. ## Usage Example ```rust // Radio Paradise (homogeneous 44.1kHz/16bit) let mut source = PlaylistSource::new(playlist, cache); let to_i24 = ToI24Node::new(); source.register(Box::new(to_i24)); // Mixed playlist (needs normalization) let mut source = PlaylistSource::new(playlist, cache); let mut resampler = ResamplingNode::new(48000); // Force 48kHz let to_i24 = ToI24Node::new(); source.register(Box::new(resampler)); resampler.register(Box::new(to_i24)); ``` ## Files Changed - pmoaudio-ext/Cargo.toml: Update playlist feature - pmoaudio-ext/src/lib.rs: Add sources module - pmoaudio-ext/src/sources/mod.rs: New sources module - pmoaudio-ext/src/sources/playlist_source.rs: New PlaylistSource (580 lines) - pmoaudio/src/nodes/resampling_node.rs: New ResamplingNode (350 lines) - pmoaudio/src/nodes/mod.rs: Register resampling_node - pmoaudio/src/lib.rs: Export ResamplingNode - INSTALL_NOTES.md: System requirements documentation ## Future Work - GapInsertionNode (inserts silence between tracks) - CrossfadeNode (fade-in/fade-out mixing) - Examples (deferred until implementation validated)
2025-11-05 13:44:24 +00:00
# Notes d'installation pour PMOMusic
## Prérequis système
### libsoxr (obligatoire pour pmoaudio)
La bibliothèque `libsoxr` est requise pour le resampling audio dans `pmoaudio`.
**Installation** :
```bash
# Debian/Ubuntu
sudo apt-get install libsoxr-dev
# Fedora/RHEL
sudo dnf install libsoxr-devel
# Arch Linux
sudo pacman -S libsoxr
# macOS (Homebrew)
brew install libsoxr
# Alpine Linux
apk add soxr-dev
```
**Sans privilèges root** : Si vous n'avez pas les droits sudo, demandez à l'administrateur système d'installer `libsoxr-dev`.
---
## Nouveaux composants
### PlaylistSource (pmoaudio-ext)
Source audio qui lit une playlist `pmoplaylist` et diffuse les pistes en continu.
**Feature** : `playlist`
```bash
# Compiler avec la feature playlist
cargo build --package pmoaudio-ext --features playlist
```
**⚠️ Important** : Cette source émet du PCM avec sample_rate et bit_depth **variables**. Pour un flux homogène, ajoutez dans le pipeline :
- `ResamplingNode` (normalise le sample_rate)
- `ToI24Node` / `ToI16Node` (normalise la profondeur de bits)
### ResamplingNode (pmoaudio)
Nœud générique qui normalise le sample_rate vers une valeur cible fixe.
**Usage** :
```rust
let mut resampler = ResamplingNode::new(48000); // Force 48kHz
```
---
## Compilation
```bash
# Compiler tout le workspace (nécessite libsoxr)
cargo build
# Compiler sans pmoaudio (si libsoxr manque)
cargo build --package pmoplaylist
cargo build --package pmoaudiocache
# etc.
```