Propagate an effectslot target property

Alc/alu.cpp

@@ -371,6 +371,7 @@ bool CalcEffectSlotParams(ALeffectslot *slot, ALCcontext *context, bool force)
     {
         slot->Params.Gain = props->Gain;
         slot->Params.AuxSendAuto = props->AuxSendAuto;
+        slot->Params.Target = props->Target;
         slot->Params.EffectType = props->Type;
         slot->Params.EffectProps = props->Props;
         if(IsReverbEffect(props->Type))

OpenAL32/Include/alAuxEffectSlot.h

@@ -53,6 +53,7 @@ struct ALeffectslotArray {
 struct ALeffectslotProps {
     ALfloat   Gain;
     ALboolean AuxSendAuto;
+    ALeffectslot *Target;
 
     ALenum Type;
     ALeffectProps Props;
@@ -66,6 +67,7 @@ struct ALeffectslotProps {
 struct ALeffectslot {
     ALfloat   Gain{1.0f};
     ALboolean AuxSendAuto{AL_TRUE};
+    ALeffectslot *Target{nullptr};
 
     struct {
         ALenum Type{AL_EFFECT_NULL};

OpenAL32/alAuxEffectSlot.cpp

@@ -589,6 +589,10 @@ ALenum InitEffectSlot(ALeffectslot *slot)
 
 ALeffectslot::~ALeffectslot()
 {
+    if(Target)
+        DecrementRef(&Target->ref);
+    Target = nullptr;
+
     struct ALeffectslotProps *props{Update.load()};
     if(props)
     {
@@ -621,6 +625,7 @@ void UpdateEffectSlotProps(ALeffectslot *slot, ALCcontext *context)
     /* Copy in current property values. */
     props->Gain = slot->Gain;
     props->AuxSendAuto = slot->AuxSendAuto;
+    props->Target = slot->Target;
 
     props->Type = slot->Effect.Type;
     props->Props = slot->Effect.Props;