OpenJOC v0.4.2

[0.4.2] — 2026-08-16

OpenJOC 0.4.2 is a focused patch release for JOC reconstruction diagnostics
and safer render-joc output handling. It preserves the 0.4.x feature freeze
and does not change JOC decoding or rendering semantics.

Improved

• JOC QMF reconstruction caches invariant phase and prototype tables while
  retaining identical reconstruction output checksums.
• Versioned performance reports include opt-in JOC reconstruction-stage timing
  diagnostics, including QMF analysis/synthesis and matrix reconstruction.
• render-joc preflights WAV/report collisions and input/output aliases,
  prompts interactively with [y/N], and supports --overwrite for scripts
  and non-interactive use.
• Authorized output replacement remains transactional: a failed render keeps
  the previous final output and performance report intact.

Known limitations

• The QMF and speaker/WAV measurements are synthetic engineering diagnostics;
  representative real E-AC-3/JOC media still requires a real-media performance
  retest. These measurements do not establish realtime readiness.
• JocSpatialBridge remains Experimental and SemanticBindingState remains
  Unresolved; no renderer-fidelity equivalence with Dolby is claimed.

Verification

• GitHub Actions verified the exact version tag, source tree, and release artifact checksums.
• The published binary targets are macOS arm64, Windows x86_64, and GNU/Linux x86_64.
• Per-platform manifests remain internal verification artifacts; the public asset set contains one unified SHA256SUMS file.