EFX:Pitch Shifter implementation

Add pitch shifter effect using standard phase vocoder, based on work of Stephan Bernsee. Only mono signal processing by now.

4 files changed, 16 insertions, 1 deletions

diff --git a/OpenAL32/Include/alAuxEffectSlot.h b/OpenAL32/Include/alAuxEffectSlot.h
index 61c72153..bb9aef59 100644
--- a/OpenAL32/Include/alAuxEffectSlot.h
+++ b/OpenAL32/Include/alAuxEffectSlot.h
@@ -167,6 +167,7 @@ EffectStateFactory *EchoStateFactory_getFactory(void);
 EffectStateFactory *EqualizerStateFactory_getFactory(void);
 EffectStateFactory *FlangerStateFactory_getFactory(void);
 EffectStateFactory *ModulatorStateFactory_getFactory(void);
+EffectStateFactory *PshifterStateFactory_getFactory(void);
 
 EffectStateFactory *DedicatedStateFactory_getFactory(void);
 
diff --git a/OpenAL32/Include/alEffect.h b/OpenAL32/Include/alEffect.h
index 95fa035e..50b64ee1 100644
--- a/OpenAL32/Include/alEffect.h
+++ b/OpenAL32/Include/alEffect.h
@@ -19,6 +19,7 @@ enum {
     EQUALIZER_EFFECT,
     FLANGER_EFFECT,
     MODULATOR_EFFECT,
+    PSHIFTER_EFFECT,
     DEDICATED_EFFECT,
 
     MAX_EFFECTS
@@ -32,7 +33,7 @@ struct EffectList {
     int type;
     ALenum val;
 };
-#define EFFECTLIST_SIZE 11
+#define EFFECTLIST_SIZE 12
 extern const struct EffectList EffectList[EFFECTLIST_SIZE];
 
 
@@ -66,6 +67,7 @@ extern const struct ALeffectVtable ALequalizer_vtable;
 extern const struct ALeffectVtable ALflanger_vtable;
 extern const struct ALeffectVtable ALmodulator_vtable;
 extern const struct ALeffectVtable ALnull_vtable;
+extern const struct ALeffectVtable ALpshifter_vtable;
 extern const struct ALeffectVtable ALdedicated_vtable;
 
 
@@ -150,6 +152,11 @@ typedef union ALeffectProps {
     } Modulator;
 
     struct {
+        ALint CoarseTune;
+        ALint FineTune;
+    } Pshifter;
+
+    struct {
         ALfloat Gain;
     } Dedicated;
 } ALeffectProps;
diff --git a/OpenAL32/alAuxEffectSlot.c b/OpenAL32/alAuxEffectSlot.c
index 301244a0..d04fc4a7 100644
--- a/OpenAL32/alAuxEffectSlot.c
+++ b/OpenAL32/alAuxEffectSlot.c
@@ -55,6 +55,7 @@ static const struct {
     { AL_EFFECT_EQUALIZER, EqualizerStateFactory_getFactory },
     { AL_EFFECT_FLANGER, FlangerStateFactory_getFactory },
     { AL_EFFECT_RING_MODULATOR, ModulatorStateFactory_getFactory },
+    { AL_EFFECT_PITCH_SHIFTER, PshifterStateFactory_getFactory},
     { AL_EFFECT_DEDICATED_DIALOGUE, DedicatedStateFactory_getFactory },
     { AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT, DedicatedStateFactory_getFactory }
 };
diff --git a/OpenAL32/alEffect.c b/OpenAL32/alEffect.c
index 6b16fc56..e7dc6ace 100644
--- a/OpenAL32/alEffect.c
+++ b/OpenAL32/alEffect.c
@@ -45,6 +45,7 @@ const struct EffectList EffectList[EFFECTLIST_SIZE] = {
     { "equalizer",  EQUALIZER_EFFECT,  AL_EFFECT_EQUALIZER },
     { "flanger",    FLANGER_EFFECT,    AL_EFFECT_FLANGER },
     { "modulator",  MODULATOR_EFFECT,  AL_EFFECT_RING_MODULATOR },
+    { "pshifter",   PSHIFTER_EFFECT,   AL_EFFECT_PITCH_SHIFTER },
     { "dedicated",  DEDICATED_EFFECT,  AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT },
     { "dedicated",  DEDICATED_EFFECT,  AL_EFFECT_DEDICATED_DIALOGUE },
 };
@@ -589,6 +590,11 @@ static void InitEffectParams(ALeffect *effect, ALenum type)
         effect->Props.Modulator.Waveform       = AL_RING_MODULATOR_DEFAULT_WAVEFORM;
         effect->vtab = &ALmodulator_vtable;
         break;
+    case AL_EFFECT_PITCH_SHIFTER:
+        effect->Props.Pshifter.CoarseTune      = AL_PITCH_SHIFTER_DEFAULT_COARSE_TUNE;
+        effect->Props.Pshifter.FineTune        = AL_PITCH_SHIFTER_DEFAULT_FINE_TUNE;
+        effect->vtab = &ALpshifter_vtable;
+        break;
     case AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT:
     case AL_EFFECT_DEDICATED_DIALOGUE:
         effect->Props.Dedicated.Gain = 1.0f;