EFX: Autowah implementation

Add autowah effect using biquad peaking filter and envelope follower

2 files changed, 11 insertions, 1 deletions

diff --git a/OpenAL32/Include/alAuxEffectSlot.h b/OpenAL32/Include/alAuxEffectSlot.h
index c1eae443..c4d662f1 100644
--- a/OpenAL32/Include/alAuxEffectSlot.h
+++ b/OpenAL32/Include/alAuxEffectSlot.h
@@ -160,6 +160,7 @@ ALvoid ReleaseALAuxiliaryEffectSlots(ALCcontext *Context);
 
 EffectStateFactory *NullStateFactory_getFactory(void);
 EffectStateFactory *ReverbStateFactory_getFactory(void);
+EffectStateFactory *AutowahStateFactory_getFactory(void);
 EffectStateFactory *ChorusStateFactory_getFactory(void);
 EffectStateFactory *CompressorStateFactory_getFactory(void);
 EffectStateFactory *DistortionStateFactory_getFactory(void);
diff --git a/OpenAL32/Include/alEffect.h b/OpenAL32/Include/alEffect.h
index 4d28a708..7b849c0c 100644
--- a/OpenAL32/Include/alEffect.h
+++ b/OpenAL32/Include/alEffect.h
@@ -12,6 +12,7 @@ struct ALeffect;
 enum {
     EAXREVERB_EFFECT = 0,
     REVERB_EFFECT,
+    AUTOWAH_EFFECT,
     CHORUS_EFFECT,
     COMPRESSOR_EFFECT,
     DISTORTION_EFFECT,
@@ -34,7 +35,7 @@ struct EffectList {
     int type;
     ALenum val;
 };
-#define EFFECTLIST_SIZE 13
+#define EFFECTLIST_SIZE 14
 extern const struct EffectList EffectList[EFFECTLIST_SIZE];
 
 
@@ -60,6 +61,7 @@ const struct ALeffectVtable T##_vtable = {  \
 
 extern const struct ALeffectVtable ALeaxreverb_vtable;
 extern const struct ALeffectVtable ALreverb_vtable;
+extern const struct ALeffectVtable ALautowah_vtable;
 extern const struct ALeffectVtable ALchorus_vtable;
 extern const struct ALeffectVtable ALcompressor_vtable;
 extern const struct ALeffectVtable ALdistortion_vtable;
@@ -104,6 +106,13 @@ typedef union ALeffectProps {
     } Reverb;
 
     struct {
+        ALfloat AttackTime;
+        ALfloat ReleaseTime;
+        ALfloat Resonance;
+        ALfloat PeakGain;
+    } Autowah;
+
+    struct {
         ALint Waveform;
         ALint Phase;
         ALfloat Rate;