5 files changed, 23 insertions, 11 deletions

diff --git a/alc/alc.cpp b/alc/alc.cpp
index 224ebce1..b98cc520 100644
--- a/alc/alc.cpp
+++ b/alc/alc.cpp
@@ -2113,7 +2113,7 @@ static ALCenum UpdateDeviceParams(ALCdevice *device, const int *attrList)
 
         if(ALeffectslot *slot{context->mDefaultSlot.get()})
         {
-            aluInitEffectPanning(slot, context);
+            aluInitEffectPanning(&slot->mSlot, context);
 
             EffectState *state{slot->Effect.State.get()};
             state->mOutTarget = device->Dry.Buffer;
@@ -2132,7 +2132,7 @@ static ALCenum UpdateDeviceParams(ALCdevice *device, const int *attrList)
                 ALeffectslot *slot{sublist.EffectSlots + idx};
                 usemask &= ~(1_u64 << idx);
 
-                aluInitEffectPanning(slot, context);
+                aluInitEffectPanning(&slot->mSlot, context);
 
                 EffectState *state{slot->Effect.State.get()};
                 state->mOutTarget = device->Dry.Buffer;
@@ -2441,7 +2441,7 @@ void ALCcontext::init()
     {
         mDefaultSlot = std::unique_ptr<ALeffectslot>{new ALeffectslot{}};
         if(mDefaultSlot->init() == AL_NO_ERROR)
-            aluInitEffectPanning(mDefaultSlot.get(), this);
+            aluInitEffectPanning(&mDefaultSlot->mSlot, this);
         else
         {
             mDefaultSlot = nullptr;
diff --git a/alc/alu.h b/alc/alu.h
index b1f48045..2aa1a652 100644
--- a/alc/alu.h
+++ b/alc/alu.h
@@ -13,7 +13,7 @@
 
 struct ALCcontext;
 struct ALCdevice;
-struct ALeffectslot;
+struct EffectSlot;
 struct MixParams;
 
 
@@ -54,7 +54,7 @@ void aluInitMixer(void);
 void aluInitRenderer(ALCdevice *device, int hrtf_id, HrtfRequestMode hrtf_appreq,
     HrtfRequestMode hrtf_userreq);
 
-void aluInitEffectPanning(ALeffectslot *slot, ALCcontext *context);
+void aluInitEffectPanning(EffectSlot *slot, ALCcontext *context);
 
 /**
  * Calculates ambisonic encoder coefficients using the X, Y, and Z direction
diff --git a/alc/effectslot.cpp b/alc/effectslot.cpp
index f3324858..8abac248 100644
--- a/alc/effectslot.cpp
+++ b/alc/effectslot.cpp
@@ -5,6 +5,7 @@
 
 #include <stddef.h>
 
+#include "alcontext.h"
 #include "almalloc.h"
 
 
@@ -16,3 +17,9 @@ EffectSlotArray *EffectSlot::CreatePtrArray(size_t count) noexcept
     void *ptr{al_calloc(alignof(EffectSlotArray), EffectSlotArray::Sizeof(count*2))};
     return new(ptr) EffectSlotArray{count};
 }
+
+EffectSlot::~EffectSlot()
+{
+    if(mWetBuffer)
+        mWetBuffer->mInUse = false;
+}
diff --git a/alc/effectslot.h b/alc/effectslot.h
index be84fcab..c1eb1cc3 100644
--- a/alc/effectslot.h
+++ b/alc/effectslot.h
@@ -10,6 +10,7 @@
 
 
 struct EffectSlot;
+struct WetBuffer;
 
 using EffectSlotArray = al::FlexArray<EffectSlot*>;
 
@@ -75,6 +76,11 @@ struct EffectSlot {
     bool DecayHFLimit{false};
     float AirAbsorptionGainHF{1.0f};
 
+    /* Mixing buffer used by the Wet mix. */
+    WetBuffer *mWetBuffer{nullptr};
+
+    ~EffectSlot();
+
     static EffectSlotArray *CreatePtrArray(size_t count) noexcept;
 
     DISABLE_ALLOC()
diff --git a/alc/panning.cpp b/alc/panning.cpp
index 0dc77621..37f016fa 100644
--- a/alc/panning.cpp
+++ b/alc/panning.cpp
@@ -1042,7 +1042,7 @@ no_hrtf:
 }
 
 
-void aluInitEffectPanning(ALeffectslot *slot, ALCcontext *context)
+void aluInitEffectPanning(EffectSlot *slot, ALCcontext *context)
 {
     ALCdevice *device{context->mDevice.get()};
     const size_t count{AmbiChannelsFromOrder(device->mAmbiOrder)};
@@ -1059,7 +1059,7 @@ void aluInitEffectPanning(ALeffectslot *slot, ALCcontext *context)
             if(wetbuffer_iter->get() == slot->mWetBuffer)
             {
                 slot->mWetBuffer = nullptr;
-                slot->mSlot.Wet.Buffer = {};
+                slot->Wet.Buffer = {};
 
                 *wetbuffer_iter = WetBufferPtr{new(FamCount(count)) WetBuffer{count}};
 
@@ -1087,12 +1087,11 @@ void aluInitEffectPanning(ALeffectslot *slot, ALCcontext *context)
     wetbuffer->mInUse = true;
 
     auto acnmap_end = AmbiIndex::FromACN.begin() + count;
-    auto iter = std::transform(AmbiIndex::FromACN.begin(), acnmap_end,
-        slot->mSlot.Wet.AmbiMap.begin(),
+    auto iter = std::transform(AmbiIndex::FromACN.begin(), acnmap_end, slot->Wet.AmbiMap.begin(),
         [](const uint8_t &acn) noexcept -> BFChannelConfig
         { return BFChannelConfig{1.0f, acn}; });
-    std::fill(iter, slot->mSlot.Wet.AmbiMap.end(), BFChannelConfig{});
-    slot->mSlot.Wet.Buffer = wetbuffer->mBuffer;
+    std::fill(iter, slot->Wet.AmbiMap.end(), BFChannelConfig{});
+    slot->Wet.Buffer = wetbuffer->mBuffer;
 }