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-rw-r--r--src/audio/oal/oal_utils.cpp169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/audio/oal/oal_utils.cpp b/src/audio/oal/oal_utils.cpp
new file mode 100644
index 00000000..4119672f
--- /dev/null
+++ b/src/audio/oal/oal_utils.cpp
@@ -0,0 +1,169 @@
+#include "oal_utils.h"
+
+#ifdef AUDIO_OAL
+
+LPALGENEFFECTS alGenEffects;
+LPALDELETEEFFECTS alDeleteEffects;
+LPALISEFFECT alIsEffect;
+LPALEFFECTI alEffecti;
+LPALEFFECTIV alEffectiv;
+LPALEFFECTF alEffectf;
+LPALEFFECTFV alEffectfv;
+LPALGETEFFECTI alGetEffecti;
+LPALGETEFFECTIV alGetEffectiv;
+LPALGETEFFECTF alGetEffectf;
+LPALGETEFFECTFV alGetEffectfv;
+LPALGENAUXILIARYEFFECTSLOTS alGenAuxiliaryEffectSlots;
+LPALDELETEAUXILIARYEFFECTSLOTS alDeleteAuxiliaryEffectSlots;
+LPALISAUXILIARYEFFECTSLOT alIsAuxiliaryEffectSlot;
+LPALAUXILIARYEFFECTSLOTI alAuxiliaryEffectSloti;
+LPALAUXILIARYEFFECTSLOTIV alAuxiliaryEffectSlotiv;
+LPALAUXILIARYEFFECTSLOTF alAuxiliaryEffectSlotf;
+LPALAUXILIARYEFFECTSLOTFV alAuxiliaryEffectSlotfv;
+LPALGETAUXILIARYEFFECTSLOTI alGetAuxiliaryEffectSloti;
+LPALGETAUXILIARYEFFECTSLOTIV alGetAuxiliaryEffectSlotiv;
+LPALGETAUXILIARYEFFECTSLOTF alGetAuxiliaryEffectSlotf;
+LPALGETAUXILIARYEFFECTSLOTFV alGetAuxiliaryEffectSlotfv;
+LPALGENFILTERS alGenFilters;
+LPALDELETEFILTERS alDeleteFilters;
+LPALISFILTER alIsFilter;
+LPALFILTERI alFilteri;
+LPALFILTERIV alFilteriv;
+LPALFILTERF alFilterf;
+LPALFILTERFV alFilterfv;
+LPALGETFILTERI alGetFilteri;
+LPALGETFILTERIV alGetFilteriv;
+LPALGETFILTERF alGetFilterf;
+LPALGETFILTERFV alGetFilterfv;
+
+
+void EFXInit()
+{
+ /* Define a macro to help load the function pointers. */
+#define LOAD_PROC(T, x) ((x) = (T)alGetProcAddress(#x))
+ LOAD_PROC(LPALGENEFFECTS, alGenEffects);
+ LOAD_PROC(LPALDELETEEFFECTS, alDeleteEffects);
+ LOAD_PROC(LPALISEFFECT, alIsEffect);
+ LOAD_PROC(LPALEFFECTI, alEffecti);
+ LOAD_PROC(LPALEFFECTIV, alEffectiv);
+ LOAD_PROC(LPALEFFECTF, alEffectf);
+ LOAD_PROC(LPALEFFECTFV, alEffectfv);
+ LOAD_PROC(LPALGETEFFECTI, alGetEffecti);
+ LOAD_PROC(LPALGETEFFECTIV, alGetEffectiv);
+ LOAD_PROC(LPALGETEFFECTF, alGetEffectf);
+ LOAD_PROC(LPALGETEFFECTFV, alGetEffectfv);
+
+ LOAD_PROC(LPALGENFILTERS, alGenFilters);
+ LOAD_PROC(LPALDELETEFILTERS, alDeleteFilters);
+ LOAD_PROC(LPALISFILTER, alIsFilter);
+ LOAD_PROC(LPALFILTERI, alFilteri);
+ LOAD_PROC(LPALFILTERIV, alFilteriv);
+ LOAD_PROC(LPALFILTERF, alFilterf);
+ LOAD_PROC(LPALFILTERFV, alFilterfv);
+ LOAD_PROC(LPALGETFILTERI, alGetFilteri);
+ LOAD_PROC(LPALGETFILTERIV, alGetFilteriv);
+ LOAD_PROC(LPALGETFILTERF, alGetFilterf);
+ LOAD_PROC(LPALGETFILTERFV, alGetFilterfv);
+
+ LOAD_PROC(LPALGENAUXILIARYEFFECTSLOTS, alGenAuxiliaryEffectSlots);
+ LOAD_PROC(LPALDELETEAUXILIARYEFFECTSLOTS, alDeleteAuxiliaryEffectSlots);
+ LOAD_PROC(LPALISAUXILIARYEFFECTSLOT, alIsAuxiliaryEffectSlot);
+ LOAD_PROC(LPALAUXILIARYEFFECTSLOTI, alAuxiliaryEffectSloti);
+ LOAD_PROC(LPALAUXILIARYEFFECTSLOTIV, alAuxiliaryEffectSlotiv);
+ LOAD_PROC(LPALAUXILIARYEFFECTSLOTF, alAuxiliaryEffectSlotf);
+ LOAD_PROC(LPALAUXILIARYEFFECTSLOTFV, alAuxiliaryEffectSlotfv);
+ LOAD_PROC(LPALGETAUXILIARYEFFECTSLOTI, alGetAuxiliaryEffectSloti);
+ LOAD_PROC(LPALGETAUXILIARYEFFECTSLOTIV, alGetAuxiliaryEffectSlotiv);
+ LOAD_PROC(LPALGETAUXILIARYEFFECTSLOTF, alGetAuxiliaryEffectSlotf);
+ LOAD_PROC(LPALGETAUXILIARYEFFECTSLOTFV, alGetAuxiliaryEffectSlotfv);
+#undef LOAD_PROC
+}
+
+void SetEffectsLevel(ALuint uiFilter, float level)
+{
+ alFilteri(uiFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
+ alFilterf(uiFilter, AL_LOWPASS_GAIN, 1.0f);
+ alFilterf(uiFilter, AL_LOWPASS_GAINHF, level);
+}
+
+static inline float gain_to_mB(float gain)
+{
+ return (gain > 1e-5f) ? (float)(log10f(gain) * 2000.0f) : -10000l;
+}
+
+static inline float mB_to_gain(float millibels)
+{
+ return (millibels > -10000.0f) ? powf(10.0f, millibels/2000.0f) : 0.0f;
+}
+
+static inline float clampF(float val, float minval, float maxval)
+{
+ if(val >= maxval) return maxval;
+ if(val <= minval) return minval;
+ return val;
+}
+
+void EAX3_Set(ALuint effect, const EAXLISTENERPROPERTIES *props)
+{
+ alEffecti (effect, AL_EFFECT_TYPE, AL_EFFECT_EAXREVERB);
+ alEffectf (effect, AL_EAXREVERB_DENSITY, clampF(powf(props->flEnvironmentSize, 3.0f) / 16.0f, 0.0f, 1.0f));
+ alEffectf (effect, AL_EAXREVERB_DIFFUSION, props->flEnvironmentDiffusion);
+ alEffectf (effect, AL_EAXREVERB_GAIN, mB_to_gain((float)props->lRoom));
+ alEffectf (effect, AL_EAXREVERB_GAINHF, mB_to_gain((float)props->lRoomHF));
+ alEffectf (effect, AL_EAXREVERB_GAINLF, mB_to_gain((float)props->lRoomLF));
+ alEffectf (effect, AL_EAXREVERB_DECAY_TIME, props->flDecayTime);
+ alEffectf (effect, AL_EAXREVERB_DECAY_HFRATIO, props->flDecayHFRatio);
+ alEffectf (effect, AL_EAXREVERB_DECAY_LFRATIO, props->flDecayLFRatio);
+ alEffectf (effect, AL_EAXREVERB_REFLECTIONS_GAIN, clampF(mB_to_gain((float)props->lReflections), AL_EAXREVERB_MIN_REFLECTIONS_GAIN, AL_EAXREVERB_MAX_REFLECTIONS_GAIN));
+ alEffectf (effect, AL_EAXREVERB_REFLECTIONS_DELAY, props->flReflectionsDelay);
+ alEffectfv(effect, AL_EAXREVERB_REFLECTIONS_PAN, &props->vReflectionsPan.x);
+ alEffectf (effect, AL_EAXREVERB_LATE_REVERB_GAIN, clampF(mB_to_gain((float)props->lReverb), AL_EAXREVERB_MIN_LATE_REVERB_GAIN, AL_EAXREVERB_MAX_LATE_REVERB_GAIN));
+ alEffectf (effect, AL_EAXREVERB_LATE_REVERB_DELAY, props->flReverbDelay);
+ alEffectfv(effect, AL_EAXREVERB_LATE_REVERB_PAN, &props->vReverbPan.x);
+ alEffectf (effect, AL_EAXREVERB_ECHO_TIME, props->flEchoTime);
+ alEffectf (effect, AL_EAXREVERB_ECHO_DEPTH, props->flEchoDepth);
+ alEffectf (effect, AL_EAXREVERB_MODULATION_TIME, props->flModulationTime);
+ alEffectf (effect, AL_EAXREVERB_MODULATION_DEPTH, props->flModulationDepth);
+ alEffectf (effect, AL_EAXREVERB_AIR_ABSORPTION_GAINHF, clampF(mB_to_gain(props->flAirAbsorptionHF), AL_EAXREVERB_MIN_AIR_ABSORPTION_GAINHF, AL_EAXREVERB_MAX_AIR_ABSORPTION_GAINHF));
+ alEffectf (effect, AL_EAXREVERB_HFREFERENCE, props->flHFReference);
+ alEffectf (effect, AL_EAXREVERB_LFREFERENCE, props->flLFReference);
+ alEffectf (effect, AL_EAXREVERB_ROOM_ROLLOFF_FACTOR, props->flRoomRolloffFactor);
+ alEffecti (effect, AL_EAXREVERB_DECAY_HFLIMIT, (props->ulFlags&EAXLISTENERFLAGS_DECAYHFLIMIT) ? AL_TRUE : AL_FALSE);
+}
+
+void EFX_Set(ALuint effect, const EAXLISTENERPROPERTIES *props)
+{
+ alEffecti(effect, AL_EFFECT_TYPE, AL_EFFECT_REVERB);
+
+ alEffectf(effect, AL_REVERB_DENSITY, clampF(powf(props->flEnvironmentSize, 3.0f) / 16.0f, 0.0f, 1.0f));
+ alEffectf(effect, AL_REVERB_DIFFUSION, props->flEnvironmentDiffusion);
+ alEffectf(effect, AL_REVERB_GAIN, mB_to_gain((float)props->lRoom));
+ alEffectf(effect, AL_REVERB_GAINHF, mB_to_gain((float)props->lRoomHF));
+ alEffectf(effect, AL_REVERB_DECAY_TIME, props->flDecayTime);
+ alEffectf(effect, AL_REVERB_DECAY_HFRATIO, props->flDecayHFRatio);
+ alEffectf(effect, AL_REVERB_REFLECTIONS_GAIN, clampF(mB_to_gain((float)props->lReflections), AL_EAXREVERB_MIN_REFLECTIONS_GAIN, AL_EAXREVERB_MAX_REFLECTIONS_GAIN));
+ alEffectf(effect, AL_REVERB_REFLECTIONS_DELAY, props->flReflectionsDelay);
+ alEffectf(effect, AL_REVERB_LATE_REVERB_GAIN, clampF(mB_to_gain((float)props->lReverb), AL_EAXREVERB_MIN_LATE_REVERB_GAIN, AL_EAXREVERB_MAX_LATE_REVERB_GAIN));
+ alEffectf(effect, AL_REVERB_LATE_REVERB_DELAY, props->flReverbDelay);
+ alEffectf(effect, AL_REVERB_AIR_ABSORPTION_GAINHF, clampF(mB_to_gain(props->flAirAbsorptionHF), AL_EAXREVERB_MIN_AIR_ABSORPTION_GAINHF, AL_EAXREVERB_MAX_AIR_ABSORPTION_GAINHF));
+ alEffectf(effect, AL_REVERB_ROOM_ROLLOFF_FACTOR, props->flRoomRolloffFactor);
+ alEffecti(effect, AL_REVERB_DECAY_HFLIMIT, (props->ulFlags&EAXLISTENERFLAGS_DECAYHFLIMIT) ? AL_TRUE : AL_FALSE);
+}
+
+void EAX3_SetReverbMix(ALuint filter, float mix)
+{
+ //long vol=(long)linear_to_dB(mix);
+ //DSPROPERTY_EAXBUFFER_ROOMHF,
+ //DSPROPERTY_EAXBUFFER_ROOM,
+ //DSPROPERTY_EAXBUFFER_REVERBMIX,
+
+ long mbvol = gain_to_mB(mix);
+ float mb = mbvol;
+ float mbhf = mbvol;
+
+ alFilteri(filter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
+ alFilterf(filter, AL_LOWPASS_GAIN, mB_to_gain(Min(mb, 0.0f)));
+ alFilterf(filter, AL_LOWPASS_GAINHF, mB_to_gain(mbhf));
+}
+
+#endif \ No newline at end of file