Livt packages

Livt.Signal

Version 0.1.1

Q1.15 sample streams, filters, windows, rate conversion, FFTs, oscillators, and mixers for Livt.

CHANGELOG.md

Changelog

All notable changes to this package are documented here.

0.1.1 - 2026-11-08

Added

  • Publish package discovery metadata, the README, the changelog, and the MIT license with this version.

Changed

  • Update dependencies to Livt.Base 1.2.1, Livt.Math 1.7.2, and Livt.Collections 1.4.2. Existing component APIs remain unchanged from 0.1.0.

0.1.0 - 2026-11-04

Added

  • CordicNcoQ15 with configurable 16- through 32-bit modulo phase, backpressure-coherent advancement, and Q1.15 sine/cosine output.
  • One-stage RealMixerQ15 and ComplexMixerQ15 pipelines with atomic paired inputs, nearest-even Q1.15 quantization, saturation, and aligned framing.
  • Scalar and compile-time-vector complex stream contracts for FFT/IFFT composition, including explicit direction, ordering, fixed-schedule scaling, and block-floating frame exponents.
  • SequentialFftQ15, an in-place radix-2 FFT/IFFT for power-of-two sizes 8 through 4096 with one shared butterfly, fixed Q1.15 twiddles, configurable per-stage scaling, natural or bit-reversed boundaries, and retained backpressure-safe output.
  • Q1.15-sample FIR numeric, streaming, reset, resource, and pipeline contract, including configurable coefficient formats and an explicit symmetric architecture.
  • Full-throughput FirQ15 with fixed elaboration-time coefficients and multiplier-reduced SymmetricFirQ15 for mirrored coefficient sets.
  • ReloadableFirQ15 and IFirQ15CoefficientControl with double-buffered, complete-bank loading and atomic activation.
  • BiquadQ15, a fixed-coefficient direct-form-I second-order IIR section with Q2.14 defaults, exact accumulation, quantized stability checks, nearest-even rounding, saturation, and stall-safe recursive state.
  • WindowQ15 and symmetric or periodic Hann, Hamming, and Blackman Q1.15 windows for power-of-two lengths 8 through 4096, using fixed folded coefficient tables and one multiplier.
  • CicDecimatorQ15 and CicInterpolatorQ15 for multiplier-free compile-time integer rate changes, with full-width registered state, automatic or explicit Q1.15 output scaling, deterministic framing, and stall-safe pipelines.
  • Unscaled signed-16 and signed/unsigned 32-bit sample-stream interfaces.
  • Exact full-window moving sum, nearest-even mean, floored RMS, and floor population variance components for signed-16 sample streams.
  • One-sample-per-clock rolling state and globally stallable arithmetic pipelines with stable markers and outputs under backpressure.
  • IQ15SampleStream, the consumer-oriented signed Q1.15 valid/ready contract with aligned first and last frame markers.
  • Q15SampleEncoding helpers for exact stream decoding and saturating encoding.
  • Q15SampleDelay<STAGES>, a registered stall-safe sample alignment pipeline.
  • Q15SampleFifo<CAPACITY>, a bounded FIFO that preserves samples and frame markers under backpressure.
  • Usage documentation covering composition, numeric representation, backpressure, latency, framing, reset, and CDC boundaries.

Compatibility

  • This is the first experimental release. Stream API compatibility is not guaranteed before Livt.Signal 1.0.0.