fix effect chain memory issues

src/FAudioGMS.c

@@ -220,9 +220,9 @@ typedef union FAudioGMS_EffectParameters
 typedef struct FAudioGMS_EffectChain
 {
     uint32_t id;
-    FAudioEffectChain fAudioEffectChain;
+    uint32_t effectCount;
-    FAudioGMS_EffectType *effectTypes; /* size equal to effect chain size */
+    FAudioGMS_EffectType *effectTypes; /* length equal to effectCount */
-    union FAudioGMS_EffectParameters *effectParameters; /* size equal to effect chain size */
+    union FAudioGMS_EffectParameters *effectParameters; /* length equal to effectCount */
 } FAudioGMS_EffectChain;
 
 static const float SPEED_OF_SOUND = 343.5f;
@@ -1268,7 +1268,15 @@ static void FAudioGMS_INTERNAL_SoundInstance_Destroy(FAudioGMS_SoundInstance* in
         device->soundInstances[instance->id] = NULL;
         IdStack_Push(&device->soundInstanceIndexStack, instance->id);
         FAudioGMS_INTERNAL_SoundInstance_Stop(instance);
+
+        if (instance->effectChainAttached)
+        {
+            FAudioVoice_DestroyVoice(instance->effectVoice);
+            SDL_free(instance->effectSends.pSends);
+        }
+
         FAudioVoice_DestroyVoice(instance->handle);
+
         if (!instance->isStatic)
         {
             SDL_free(instance->soundData.streamingSound.streamBuffer);
@@ -1329,8 +1337,7 @@ double FAudioGMS_EffectChain_Create()
     RETURN_ON_NULL_DEVICE(-1.0)
     FAudioGMS_EffectChain* effectChain = SDL_malloc(sizeof(FAudioGMS_EffectChain));
 
-    effectChain->fAudioEffectChain.EffectCount = 0;
+    effectChain->effectCount = 0;
-    effectChain->fAudioEffectChain.pEffectDescriptors = NULL;
     effectChain->effectTypes = NULL;
     effectChain->effectParameters = NULL;
 
@@ -1353,23 +1360,13 @@ double FAudioGMS_EffectChain_Create()
 
 static void FAudioGMS_INTERNAL_EffectChain_AddReverb(FAudioGMS_EffectChain* effectChain, FAudioFXReverbParameters *reverbParameters)
 {
-    FAPO* reverb;
+    effectChain->effectCount += 1;
-    FAudioCreateReverb(&reverb, 0);
 
-    effectChain->fAudioEffectChain.EffectCount += 1;
+    effectChain->effectTypes = SDL_realloc(effectChain->effectTypes, effectChain->effectCount * sizeof(FAudioGMS_EffectType));
-    effectChain->fAudioEffectChain.pEffectDescriptors = SDL_realloc(effectChain->fAudioEffectChain.pEffectDescriptors, effectChain->fAudioEffectChain.EffectCount * sizeof(FAudioEffectDescriptor));
+    effectChain->effectTypes[effectChain->effectCount - 1] = EffectType_Reverb;
 
-    FAudioEffectDescriptor* reverbDescriptor = &effectChain->fAudioEffectChain.pEffectDescriptors[effectChain->fAudioEffectChain.EffectCount - 1];
+    effectChain->effectParameters = SDL_realloc(effectChain->effectParameters, effectChain->effectCount * sizeof(FAudioGMS_EffectParameters));
-
+    SDL_memcpy(&effectChain->effectParameters[effectChain->effectCount - 1], reverbParameters, sizeof(FAudioFXReverbParameters));
-    reverbDescriptor->InitialState = 1;
-    reverbDescriptor->OutputChannels = device->deviceDetails.OutputFormat.Format.nChannels == 6 ? 6 : 1;
-    reverbDescriptor->pEffect = reverb;
-
-    effectChain->effectTypes = SDL_realloc(effectChain->effectTypes, effectChain->fAudioEffectChain.EffectCount * sizeof(FAudioGMS_EffectType));
-    effectChain->effectTypes[effectChain->fAudioEffectChain.EffectCount - 1] = EffectType_Reverb;
-
-    effectChain->effectParameters = SDL_realloc(effectChain->effectParameters, effectChain->fAudioEffectChain.EffectCount * sizeof(FAudioGMS_EffectParameters));
-    SDL_memcpy(&effectChain->effectParameters[effectChain->fAudioEffectChain.EffectCount - 1], reverbParameters, sizeof(FAudioFXReverbParameters));
 }
 
 void FAudioGMS_EffectChain_AddDefaultReverb(double effectChainID)
@@ -1460,6 +1457,70 @@ void FAudioGMS_EffectChain_AddReverb(
     }
 }
 
+static void FAudioGMS_INTERNAL_SoundInstance_SetEffectGain(FAudioGMS_SoundInstance *instance, float effectGain)
+{
+    float* outputMatrix = instance->dspSettings.pMatrixCoefficients;
+
+    outputMatrix[0] = effectGain;
+    if (instance->dspSettings.SrcChannelCount == 2)
+    {
+        outputMatrix[1] = effectGain;
+    }
+
+    FAudioVoice_SetOutputMatrix(
+        instance->handle,
+        instance->effectVoice,
+        instance->dspSettings.SrcChannelCount,
+        1,
+        outputMatrix,
+        0);
+
+    instance->effectGain = effectGain;
+}
+
+void FAudioGMS_SoundInstance_SetEffectGain(double soundInstanceID, double effectGain)
+{
+    RETURN_ON_NULL_DEVICE()
+    FAudioGMS_SoundInstance *instance = FAudioGMS_INTERNAL_LookupSoundInstance((uint32_t)soundInstanceID);
+    
+    if (instance != NULL)
+    {
+        FAudioGMS_INTERNAL_SoundInstance_SetEffectGain(instance, effectGain);
+    }
+}
+
+static FAudioEffectChain* FAudioGMS_INTERNAL_CreateFAudioEffectChain(FAudioGMS_EffectChain* effectChain)
+{
+    FAudioEffectChain* fAudioEffectChain = SDL_malloc(sizeof(FAudioEffectChain));
+    uint32_t i;
+
+    fAudioEffectChain->EffectCount = effectChain->effectCount;
+    fAudioEffectChain->pEffectDescriptors = SDL_malloc(fAudioEffectChain->EffectCount * sizeof(FAudioEffectDescriptor));
+
+    FAPO* reverb;
+
+    for (i = 0; i < effectChain->effectCount; i += 1)
+    {
+        switch (effectChain->effectTypes[i])
+        {
+        case EffectType_Reverb:
+            FAudioCreateReverb(&reverb, 0);
+
+            FAudioEffectDescriptor* reverbDescriptor = &fAudioEffectChain->pEffectDescriptors[i];
+            reverbDescriptor->InitialState = 1;
+            reverbDescriptor->OutputChannels = device->deviceDetails.OutputFormat.Format.nChannels == 6 ? 6 : 1;
+            reverbDescriptor->pEffect = reverb;
+            break;
+
+        default:
+            Log("Unknown effect type! Something is very wrong!");
+            return;
+        }
+    }
+
+    return fAudioEffectChain;
+}
+
 void FAudioGMS_SoundInstance_SetEffectChain(double soundInstanceID, double effectChainID, double effectGain)
 {
     RETURN_ON_NULL_DEVICE()
@@ -1469,8 +1530,13 @@ void FAudioGMS_SoundInstance_SetEffectChain(double soundInstanceID, double effec
 
     if (instance != NULL && effectChain != NULL)
     {
-        if (!instance->effectChainAttached)
+        if (instance->effectChainAttached)
         {
+            /* This frees the effect chain on the voice */
+            FAudioVoice_SetEffectChain(instance->handle, NULL);
+        }
+
+        FAudioEffectChain* fAudioEffectChain = FAudioGMS_INTERNAL_CreateFAudioEffectChain(effectChain);
         FAudio_CreateSubmixVoice(
             device->handle,
             &instance->effectVoice,
@@ -1479,7 +1545,7 @@ void FAudioGMS_SoundInstance_SetEffectChain(double soundInstanceID, double effec
             0,
             0,
             NULL,
-                &effectChain->fAudioEffectChain);
+            fAudioEffectChain);
 
         instance->effectSends.SendCount = 2;
         instance->effectSends.pSends = SDL_malloc(2 * sizeof(FAudioSendDescriptor));
@@ -1490,15 +1556,8 @@ void FAudioGMS_SoundInstance_SetEffectChain(double soundInstanceID, double effec
         instance->effectSends.pSends[1].pOutputVoice = instance->effectVoice;
 
         instance->effectChainAttached = 1;
-        }
-        else
-        {
-            FAudioVoice_SetEffectChain(
-                instance->effectVoice,
-                &effectChain->fAudioEffectChain);
-        }
 
-        for (i = 0; i < effectChain->fAudioEffectChain.EffectCount; i += 1)
+        for (i = 0; i < effectChain->effectCount; i += 1)
         {
             uint32_t parametersSize;
             void *parameters;
@@ -1526,24 +1585,15 @@ void FAudioGMS_SoundInstance_SetEffectChain(double soundInstanceID, double effec
             instance->handle,
             &instance->effectSends);
 
-        /* TODO: move this to a different API call */
+        FAudioGMS_INTERNAL_SoundInstance_SetEffectGain(instance, effectGain);
-        float *outputMatrix = instance->dspSettings.pMatrixCoefficients;
 
-        outputMatrix[0] = effectGain;
+        /* all the effect parameters are copied to the voice so we free here */
-        if (instance->dspSettings.SrcChannelCount == 2)
+        for (i = 0; i < effectChain->effectCount; i += 1)
         {
-            outputMatrix[1] = effectGain;
+            FAPOBase_Release((FAPOBase*)fAudioEffectChain->pEffectDescriptors[i].pEffect);
         }
-
+        SDL_free(fAudioEffectChain->pEffectDescriptors);
-        FAudioVoice_SetOutputMatrix(
+        SDL_free(fAudioEffectChain); 
-            instance->handle,
-            instance->effectVoice,
-            instance->dspSettings.SrcChannelCount,
-            1,
-            outputMatrix,
-            0);
-
-        instance->effectGain = effectGain;
     }
 }
 
@@ -1555,14 +1605,8 @@ static void FAudioGMS_INTERNAL_EffectChain_Destroy(FAudioGMS_EffectChain *effect
         device->effectChains[effectChain->id] = NULL;
         IdStack_Push(&device->effectChainIndexStack, effectChain->id);
 
-        for (i = 0; i < effectChain->fAudioEffectChain.EffectCount; i += 1)
-        {
-            FAPOBase_Release((FAPOBase*)effectChain->fAudioEffectChain.pEffectDescriptors[i].pEffect);
-        }
-
         SDL_free(effectChain->effectParameters);
         SDL_free(effectChain->effectTypes);
-        SDL_free(effectChain->fAudioEffectChain.pEffectDescriptors);
         SDL_free(effectChain);
     }
 }

src/FAudioGMS.h

@@ -93,7 +93,12 @@ FAUDIOGMSAPI void FAudioGMS_EffectChain_AddReverb(
 );
 FAUDIOGMSAPI void FAudioGMS_EffectChain_Destroy(double effectChainID);
 
+/*
+ * NOTE: Any changes to the effect chain will NOT apply after this is set!
+ * You MUST call SetEffectChain again if you make changes to the effect chain parameters!
+ */
 FAUDIOGMSAPI void FAudioGMS_SoundInstance_SetEffectChain(double soundInstanceID, double effectChainID, double effectGain);
+FAUDIOGMSAPI void FAudioGMS_SoundInstance_SetEffectGain(double soundInstanceID, double effectGain);
 
 FAUDIOGMSAPI void FAudioGMS_SetListenerPosition(double x, double y, double z);