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Diffstat (limited to 'src/audio/oal/oal_utils.cpp')
| -rw-r--r-- | src/audio/oal/oal_utils.cpp | 169 |
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
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