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Implement AL_AIR_ABSORPTION_FACTOR source property

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This commit is contained in:
Chris Robinson 2007-12-18 13:37:07 -08:00
parent 168d8e3bee
commit ebb30ec5b0
4 changed files with 21 additions and 0 deletions
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4
Alc/ALu.c
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@ -378,6 +378,10 @@ static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource,
break;
}
if(ALSource->AirAbsorptionFactor > 0.0f)
DryGainHF *= pow(ALSource->AirAbsorptionFactor * AIRABSORBGAINHF,
Distance * MetersPerUnit);
*drygainhf = DryGainHF;
*wetgainhf = WetGainHF;

1
OpenAL32/Include/alMain.h
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@ -98,6 +98,7 @@ extern char szDebug[256];
//#define OUTPUT_BUFFER_SIZE (32768*SWMIXER_OUTPUT_RATE/22050)
#define SPEEDOFSOUNDMETRESPERSEC (343.3f)
#define AIRABSORBGAINHF (0.994f)
typedef struct {
ALCboolean (*OpenPlayback)(ALCdevice*, const ALCchar*);

2
OpenAL32/Include/alSource.h
View File

@ -68,6 +68,8 @@ typedef struct ALsource_struct
ALboolean DryGainHFAuto;
ALfloat OuterGainHF;
ALfloat AirAbsorptionFactor;
// Index to itself
ALuint source;

14
OpenAL32/alSource.c
View File

@ -348,6 +348,13 @@ ALAPI ALvoid ALAPIENTRY alSourcef(ALuint source, ALenum eParam, ALfloat flValue)
alSetError(AL_INVALID_VALUE);
break;
case AL_AIR_ABSORPTION_FACTOR:
if (flValue >= 0.0f && flValue <= 10.0f)
pSource->AirAbsorptionFactor = flValue;
else
alSetError(AL_INVALID_VALUE);
break;
case AL_SEC_OFFSET:
case AL_SAMPLE_OFFSET:
case AL_BYTE_OFFSET:
@ -472,6 +479,7 @@ ALAPI ALvoid ALAPIENTRY alSourcefv(ALuint source, ALenum eParam, const ALfloat *
case AL_SEC_OFFSET:
case AL_SAMPLE_OFFSET:
case AL_BYTE_OFFSET:
case AL_AIR_ABSORPTION_FACTOR:
alSourcef(source, eParam, pflValues[0]);
break;
@ -850,6 +858,10 @@ ALAPI ALvoid ALAPIENTRY alGetSourcef(ALuint source, ALenum eParam, ALfloat *pflV
*pflValue = pSource->flRefDistance;
break;
case AL_AIR_ABSORPTION_FACTOR:
*pflValue = pSource->AirAbsorptionFactor;
break;
default:
alSetError(AL_INVALID_ENUM);
break;
@ -958,6 +970,7 @@ ALAPI ALvoid ALAPIENTRY alGetSourcefv(ALuint source, ALenum eParam, ALfloat *pfl
case AL_CONE_OUTER_ANGLE:
case AL_REFERENCE_DISTANCE:
case AL_CONE_OUTER_GAINHF:
case AL_AIR_ABSORPTION_FACTOR:
alGetSourcef(source, eParam, pflValues);
break;
@ -1879,6 +1892,7 @@ static ALvoid InitSourceParams(ALsource *pSource)
pSource->flOuterGain = 0.0f;
pSource->DryGainHFAuto = AL_TRUE;
pSource->AirAbsorptionFactor = 0.0f;
pSource->state = AL_INITIAL;
pSource->lSourceType = AL_UNDETERMINED;