Apply more proper air absorption to the wet path

This properly accounts for the room rolloff factor for normal air absorption
(which makes it none by default, like distance attenuation), and uses the
reverb's decay time, decay hf ratio, decay hf limit, and room air absorption
properties to calculate an initial hf decay with the WetGainAuto flag. This
mirrors the behavior of the initial distance decay.

2 files changed, 4 insertions, 0 deletions

diff --git a/OpenAL32/Include/alAuxEffectSlot.h b/OpenAL32/Include/alAuxEffectSlot.h
index 4eb340a4..7126f8f5 100644
--- a/OpenAL32/Include/alAuxEffectSlot.h
+++ b/OpenAL32/Include/alAuxEffectSlot.h
@@ -121,7 +121,9 @@ typedef struct ALeffectslot {
 
         ALfloat RoomRolloff; /* Added to the source's room rolloff, not multiplied. */
         ALfloat DecayTime;
+        ALfloat DecayHFRatio;
         ALfloat AirAbsorptionGainHF;
+        ALboolean DecayHFLimit;
     } Params;
 
     /* Self ID */
diff --git a/OpenAL32/alAuxEffectSlot.c b/OpenAL32/alAuxEffectSlot.c
index 5d110500..8a990584 100644
--- a/OpenAL32/alAuxEffectSlot.c
+++ b/OpenAL32/alAuxEffectSlot.c
@@ -615,7 +615,9 @@ ALenum InitEffectSlot(ALeffectslot *slot)
     slot->Params.EffectState = slot->Effect.State;
     slot->Params.RoomRolloff = 0.0f;
     slot->Params.DecayTime = 0.0f;
+    slot->Params.DecayHFRatio = 0.0f;
     slot->Params.AirAbsorptionGainHF = 1.0f;
+    slot->Params.DecayHFLimit = AL_FALSE;
 
     return AL_NO_ERROR;
 }