# headroom-dsp

DSP kernels for Headroom. Pure Rust, no dependencies.

- `Limiter` — feed-forward true-peak brickwall with configurable
  oversampling (1/2/4/8×), lookahead, hold, and release.
- `Compressor` — log-domain feed-forward with peak or RMS detector,
  soft knee, attack/release, and optional auto-makeup.
- `AttackRelease` — exponential envelope follower (peak / inverse-gain
  modes).
- `DelayLine`, `SlidingMaxBuffer`, `PolyphaseUpsampler`,
  `PolyphaseDownsampler` — supporting building blocks.

All processors are allocation-free in their `process_*` methods.
Construction allocates; do not construct in the audio thread.

## License

MPL-2.0.