flacx

High-performance WAV/FLAC conversion for Rust.

flacx is the publishable library crate in the workspace. It provides the shared encode/decode pipeline used by both Rust callers and the sibling CLI crate.

Add to your project

[dependencies]
flacx = "0.3.0"

Quick start

use flacx::{Encoder, EncoderConfig, level::Level};

let config = EncoderConfig::default()
    .with_level(Level::Level8)
    .with_threads(4);

Encoder::new(config)
    .encode_file("input.wav", "output.flac")
    .unwrap();

use flacx::Decoder;

Decoder::new()
    .decode_file("input.flac", "output.wav")
    .unwrap();

Primary API surface

• EncoderConfig
• Encoder
• Decoder
• encode_file
• encode_bytes
• decode_file
• decode_bytes

Optional progress feature

Progress support is behind the optional progress Cargo feature and is disabled by default.

[dependencies]
flacx = { version = "0.3.0", features = ["progress"] }

When enabled, the additional progress-specific API surface includes:

• EncodeProgress
• Encoder::encode_with_progress
• Encoder::encode_file_with_progress

Current scope

• WAV-to-FLAC encoding
• FLAC-to-WAV decoding
• seekable input/output API
• current supported narrow encode/decode subset

Out of scope

• metadata editing
• non-seekable output
• broader transcoding beyond WAV <-> FLAC
• broader format support beyond the current engine envelope

Workspace note

The CLI lives in a separate workspace crate, flacx-cli, and is not bundled into the publishable library package.

Progress note

Encoder can optionally report real encode progress while keeping the existing fast encode path intact. The sibling CLI crate explicitly enables this feature and uses that signal to render a TTY-only progress bar by default.

Stability note

The package layout and documentation may change independently from the encode engine. This crate documents the current workspace behavior without relying on internal milestone labels.