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NextDAAD Authoring Kit v0.2.0

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@absent42 absent42 released this 24 Jul 10:43
· 1336 commits to main since this release
v0.2.0
4266e1e

v0.2.0 - 2026-07-23

Cutscene video playback, hardware-measured performance work,
and a self-contained authoring pipeline.

Video cutscenes

  • New native NXV video format. One parameterized
    container: self-describing header, 512-byte-block-aligned sections,
    per-frame adaptive palettes, full-rate audio (stereo 15625 Hz or
    mono 23325 Hz), play-once and loop.
  • Five encoding profiles, all verified inside their frame budgets on
    real hardware: N0 cinema 320x256@12.5, N1 classic 256x192@20,
    N2 widescreen 256x144@25, N3 widescreen XL 320x192@16.67,
    N4 epic 320x120@20.
  • Video player: raw SD streaming (persistent CMD18 window, no esxDOS
    in the hot path), double-buffered per-frame palette apply (palette
    sparkle eliminated), presentation isolation (tilemap hidden and
    fallback black around the video), cheap loop restart (no file
    reopen, header read skipped on rewind).
  • AY music is parked cleanly during video playback and resumes after.
  • videnc.py encoder: NXV output with profile auto-selection,
    center-crop, clipping, mono and no-palette options.

Performance

  • Codebase-wide optimization: engine dispatch (MUL-based, ~96T saved per condact on hot paths), overlay routine slimming, alternate-register-set residency
    in the video gap path, unrolled transfer runs with computed entry.
  • Silicon-measured throughout: the SD SPI sustained floor
    (~22T/byte effective) was established by emulator-vs-hardware
    differential measurement and every profile budget derives from it.

Fixes

  • Keyboard symbol-shift map off-by-one (comma read as period, and
    every symbol from F onward shifted) - an escaped backslash
    assembled as two bytes.
  • CAPS+2 caps-lock now toggles instead of typing a literal 2.
  • Font glyphs: proper ampersand at $26 and pound sterling at $60
    (genuine 48K ROM shapes; the inherited Spanish-lineage DAAD font
    carried a euro sign and apostrophe there).
  • Layer 2 exit state after 256x192 video in a 320x256 game left to
    the game redraw convention (see SETUP.md - PICTURE/DISPLAY or
    CLS+RESTART after a cutscene).

Authoring kit

  • mp4-to-NXV cutscene pipeline in BUILD.BAT: drop VIDEO\NNN.mp4 in
    and the build encodes it (cached beside the source, re-encoded only
    when the source changes; VIDPROFILE knob, auto by default).
  • videnc.exe shipped with the kit - no Python needed;
    ffmpeg is the only extra download for video authoring.
  • Starter template demonstrates both post-video restore conventions.
  • Stale-clean fix: removed audio sources no longer leave their old
    WAV staged in RELEASE.
  • Kit interpreter republished (plays NXV).
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