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Audio Phase 1 (AUDIO_FIDELITY F3/F4/F10/F15/F18/F20 + KB): the quick wins

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F3 distance: alDistanceModel(AL_NONE); restored the commented authored
  distance multiply in Dynamic3D::CalculateSourceVolumeScale, added the same
  override to Static3D, dropped the (now inert) AL_MAX_DISTANCE writes.  Far
  battle audio follows the authored knee/rolloff curve again, and the volume
  cull / voice steal / ducking chains are distance-aware.
F4 volume law: AL_GAIN = volume_scale^2 at all 3 per-frame sites (Direct/
  Dyn3D/Static3D) -- the GM CC7 squared curve; linear was ~+6 dB at mids.
F10 doppler: alDopplerFactor(0) (AL's model ran wrong constants + sign-
  inverted velocity: approaching sources pitched DOWN); the AUTHORED
  dopplerCents (AUDIO.INI range/speed-of-sound model, decomp-proven consumer
  part_008.c:7466) now adds into the Dynamic3D pitch chain.
F15 ConfigureActivePress: published at the MechSubsystem BASE (binary id 2,
  descriptor @0x50de5c -> +0x110); renamed the misnamed vitalSubsystemIndex
  member (the weapon ConfigureMappables handler already drives it 0/-1).
  Removed the invented Sensor/Myomers duplicates and RESTORED their byte-
  exact layouts (0x328/0x358 allocs + asserts).  MechWeapon's pinned-id pad
  absorbed the +1 chain shift -- which matches the binary's own numbering.
F18 cook-off warning: AmmoBin FireCountdownStarted -> the existing
  cookOffArmed @0x18C (binary table @0x512600); the countdown klaxon can fire.
F20 zoom blip: L4MechControlsMapper publishes TargetRangeExponent -> the live
  @0x1a4 zoom member (own table chained to MechControlsMapper).
KB: replaced the bogus divisionParameters+0x10 rate read with
  SystemClock::GetTicksPerSecond() (FUN_0044e19c is GetFrameRate -- original
  audio frames were CLOCK TICKS).

Regression (35s drive+fire): stable; ConfigureActivePress binds real on all 9
subsystems (idle -1, zero pad redirects); FireCountdownStarted +
TargetRangeExponent bind live members; attrnull 53 -> 41; chirp still dead;
footfalls still fire (gain now correctly squared).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-16 10:43:38 -05:00
co-authored by Claude Opus 4.8
parent 05cb3f5549
commit fc7f311771
16 changed files with 162 additions and 81 deletions
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engine/MUNGA/AUDIO.cpp
+9 -2
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@@ -95,8 +95,15 @@ void
}
headEntitySocket.Add(entity);
alDistanceModel(AL_LINEAR_DISTANCE);
alDopplerFactor(0.3f);
// FIDELITY (AUDIO_FIDELITY.md F3/F10): the engine computes the AUTHORED
// distance-attenuation curve (AUDIO.INI amplitude_rolloff knee/exponent ->
// AudioLocation::distanceVolumeScale) and the authored doppler-cents model.
// Disable OpenAL's own models so they can't double-apply / fight them:
// AL_LINEAR_DISTANCE made far battle audio fade to zero on a straight line
// (-6 dB vs authored at 300u), and AL doppler ran with the wrong constants
// AND a sign-inverted velocity feed (approaching sources pitched DOWN).
alDistanceModel(AL_NONE);
alDopplerFactor(0.0f);
#if 0
//