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Audio: ENABLE the engine (relax dead AWE-card gate) + diagnose the real silence (task #50)

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User reported never hearing any audio. Root-caused: the KB "Audio: DONE" was wrong.
The OpenAL playback chain IS fully implemented (device/buffers/sources; PlayNote
really calls alSourcePlay), but three gaps kept it silent:

1. GATED OFF (the "no sound" root cause): BTL4Application::MakeAudioRenderer returned
   NULL unless the pod's AWE_FRONT/AWE_REAR AWE32-card env vars were set -- authentic
   1995 pod behavior, dead on modern hardware, so the renderer was NEVER created.
   FIXED: default audio ON (BT_NO_AUDIO=1 restores silence; AWE vars still force-on).
   Verified: the OpenAL device now opens with no env vars ([audio] device OPENED).
2. Soundbank STUB: allPresets[2][100] (btstubs.cpp) is zero-init -> PRESET_isImplemented
   false -> 0 buffers load. Sample data exists (AUDIO1/2.RES: EnginePower/LaserAFire/...)
   but the event->sample map is gone (not in the decomp). STILL OPEN.
3. No triggering: the reconstructed game never creates AudioEntities on events. STILL OPEN.

So the device opens but nothing loads/plays yet -- enabling real sound needs the
soundbank reconstructed + the game triggers wired (a proper audio wave). Added a
BT_AUDIO_LOG trace harness across L4AUDRND/L4AUDRES/L4AUDLVL. KB corrected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-15 18:02:31 -05:00
co-authored by Claude Opus 4.8
parent d624b9b783
commit 52440e13b0
6 changed files with 38 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
game/reconstructed/btl4app.cpp
+9 -1
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@@ -266,7 +266,15 @@ BTL4Application::SharedData
char *front_card = getenv(AWE_FRONT_ENV_VAR); // FUN_004dee74
char *rear_card = getenv(AWE_REAR_ENV_VAR);
if (front_card == NULL || rear_card == NULL)
// AUTHENTIC 1995 gate: the pod carried TWO AWE32 cards (front/rear) and
// audio was OFF unless both AWE_FRONT/AWE_REAR were set. Those cards don't
// exist on modern hardware, so this check silenced audio on every machine
// (root cause of "no sound" -- the renderer was never created).
// MODERNIZED (task #50, 2026-07-15): default audio ON through the WinTesla
// OpenAL renderer (the OS default output device). BT_NO_AUDIO=1 restores
// the silent/no-renderer behavior; the AWE vars still force it on too.
(void)front_card; (void)rear_card;
if (getenv("BT_NO_AUDIO"))
{
return NULL;
}