1 files changed, 193 insertions, 0 deletions
diff --git a/alc/effects/base.h b/alc/effects/base.h
new file mode 100644
index 00000000..6889308d
--- /dev/null
+++ b/alc/effects/base.h
@@ -0,0 +1,193 @@
+#ifndef EFFECTS_BASE_H
+#define EFFECTS_BASE_H
+
+#include <cstddef>
+
+#include "alcmain.h"
+#include "almalloc.h"
+#include "alspan.h"
+#include "atomic.h"
+#include "intrusive_ptr.h"
+
+struct ALeffectslot;
+
+
+union EffectProps {
+    struct {
+        // Shared Reverb Properties
+        ALfloat Density;
+        ALfloat Diffusion;
+        ALfloat Gain;
+        ALfloat GainHF;
+        ALfloat DecayTime;
+        ALfloat DecayHFRatio;
+        ALfloat ReflectionsGain;
+        ALfloat ReflectionsDelay;
+        ALfloat LateReverbGain;
+        ALfloat LateReverbDelay;
+        ALfloat AirAbsorptionGainHF;
+        ALfloat RoomRolloffFactor;
+        bool DecayHFLimit;
+
+        // Additional EAX Reverb Properties
+        ALfloat GainLF;
+        ALfloat DecayLFRatio;
+        ALfloat ReflectionsPan[3];
+        ALfloat LateReverbPan[3];
+        ALfloat EchoTime;
+        ALfloat EchoDepth;
+        ALfloat ModulationTime;
+        ALfloat ModulationDepth;
+        ALfloat HFReference;
+        ALfloat LFReference;
+    } Reverb;
+
+    struct {
+        ALfloat AttackTime;
+        ALfloat ReleaseTime;
+        ALfloat Resonance;
+        ALfloat PeakGain;
+    } Autowah;
+
+    struct {
+        ALint Waveform;
+        ALint Phase;
+        ALfloat Rate;
+        ALfloat Depth;
+        ALfloat Feedback;
+        ALfloat Delay;
+    } Chorus; /* Also Flanger */
+
+    struct {
+        bool OnOff;
+    } Compressor;
+
+    struct {
+        ALfloat Edge;
+        ALfloat Gain;
+        ALfloat LowpassCutoff;
+        ALfloat EQCenter;
+        ALfloat EQBandwidth;
+    } Distortion;
+
+    struct {
+        ALfloat Delay;
+        ALfloat LRDelay;
+
+        ALfloat Damping;
+        ALfloat Feedback;
+
+        ALfloat Spread;
+    } Echo;
+
+    struct {
+        ALfloat LowCutoff;
+        ALfloat LowGain;
+        ALfloat Mid1Center;
+        ALfloat Mid1Gain;
+        ALfloat Mid1Width;
+        ALfloat Mid2Center;
+        ALfloat Mid2Gain;
+        ALfloat Mid2Width;
+        ALfloat HighCutoff;
+        ALfloat HighGain;
+    } Equalizer;
+
+    struct {
+        ALfloat Frequency;
+        ALint LeftDirection;
+        ALint RightDirection;
+    } Fshifter;
+
+    struct {
+        ALfloat Frequency;
+        ALfloat HighPassCutoff;
+        ALint Waveform;
+    } Modulator;
+
+    struct {
+        ALint CoarseTune;
+        ALint FineTune;
+    } Pshifter;
+
+    struct {
+        ALfloat Rate;
+        ALint PhonemeA;
+        ALint PhonemeB;
+        ALint PhonemeACoarseTuning;
+        ALint PhonemeBCoarseTuning;
+        ALint Waveform;
+    } Vmorpher;
+
+    struct {
+        ALfloat Gain;
+    } Dedicated;
+};
+
+
+struct EffectVtable {
+    void (*const setParami)(EffectProps *props, ALCcontext *context, ALenum param, ALint val);
+    void (*const setParamiv)(EffectProps *props, ALCcontext *context, ALenum param, const ALint *vals);
+    void (*const setParamf)(EffectProps *props, ALCcontext *context, ALenum param, ALfloat val);
+    void (*const setParamfv)(EffectProps *props, ALCcontext *context, ALenum param, const ALfloat *vals);
+
+    void (*const getParami)(const EffectProps *props, ALCcontext *context, ALenum param, ALint *val);
+    void (*const getParamiv)(const EffectProps *props, ALCcontext *context, ALenum param, ALint *vals);
+    void (*const getParamf)(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *val);
+    void (*const getParamfv)(const EffectProps *props, ALCcontext *context, ALenum param, ALfloat *vals);
+};
+
+#define DEFINE_ALEFFECT_VTABLE(T)           \
+const EffectVtable T##_vtable = {           \
+    T##_setParami, T##_setParamiv,          \
+    T##_setParamf, T##_setParamfv,          \
+    T##_getParami, T##_getParamiv,          \
+    T##_getParamf, T##_getParamfv,          \
+}
+
+
+struct EffectTarget {
+    MixParams *Main;
+    RealMixParams *RealOut;
+};
+
+struct EffectState : public al::intrusive_ref<EffectState> {
+    al::span<FloatBufferLine> mOutTarget;
+
+
+    virtual ~EffectState() = default;
+
+    virtual ALboolean deviceUpdate(const ALCdevice *device) = 0;
+    virtual void update(const ALCcontext *context, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target) = 0;
+    virtual void process(const size_t samplesToDo, const al::span<const FloatBufferLine> samplesIn, const al::span<FloatBufferLine> samplesOut) = 0;
+};
+
+
+struct EffectStateFactory {
+    virtual ~EffectStateFactory() { }
+
+    virtual EffectState *create() = 0;
+    virtual EffectProps getDefaultProps() const noexcept = 0;
+    virtual const EffectVtable *getEffectVtable() const noexcept = 0;
+};
+
+
+EffectStateFactory *NullStateFactory_getFactory(void);
+EffectStateFactory *ReverbStateFactory_getFactory(void);
+EffectStateFactory *StdReverbStateFactory_getFactory(void);
+EffectStateFactory *AutowahStateFactory_getFactory(void);
+EffectStateFactory *ChorusStateFactory_getFactory(void);
+EffectStateFactory *CompressorStateFactory_getFactory(void);
+EffectStateFactory *DistortionStateFactory_getFactory(void);
+EffectStateFactory *EchoStateFactory_getFactory(void);
+EffectStateFactory *EqualizerStateFactory_getFactory(void);
+EffectStateFactory *FlangerStateFactory_getFactory(void);
+EffectStateFactory *FshifterStateFactory_getFactory(void);
+EffectStateFactory *ModulatorStateFactory_getFactory(void);
+EffectStateFactory *PshifterStateFactory_getFactory(void);
+EffectStateFactory* VmorpherStateFactory_getFactory(void);
+
+EffectStateFactory *DedicatedStateFactory_getFactory(void);
+
+
+#endif /* EFFECTS_BASE_H */