aboutsummaryrefslogtreecommitdiffstats
path: root/Alc/ALu.c
diff options
context:
space:
mode:
Diffstat (limited to 'Alc/ALu.c')
-rw-r--r--Alc/ALu.c198
1 files changed, 112 insertions, 86 deletions
diff --git a/Alc/ALu.c b/Alc/ALu.c
index 059c4afd..adb1da67 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -184,7 +184,6 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
DryGain = __min(DryGain,MaxVolume);
DryGain = __max(DryGain,MinVolume);
DryGainHF = 1.0f;
-
switch(ALSource->DirectFilter.type)
{
case AL_FILTER_LOWPASS:
@@ -192,6 +191,20 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
DryGainHF *= ALSource->DirectFilter.GainHF;
break;
}
+ for(i = 0;i < NumSends;i++)
+ {
+ WetGain[i] = SourceVolume;
+ WetGain[i] = __min(WetGain[i],MaxVolume);
+ WetGain[i] = __max(WetGain[i],MinVolume);
+ WetGainHF[i] = 1.0f;
+ switch(ALSource->Send[i].WetFilter.type)
+ {
+ case AL_FILTER_LOWPASS:
+ WetGain[i] *= ALSource->Send[i].WetFilter.Gain;
+ WetGainHF[i] *= ALSource->Send[i].WetFilter.GainHF;
+ break;
+ }
+ }
SrcMatrix = ALSource->Params.DryGains;
for(i = 0;i < MAXCHANNELS;i++)
@@ -309,24 +322,8 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
}
}
}
-
for(i = 0;i < NumSends;i++)
- {
- WetGain[i] = SourceVolume;
- WetGain[i] = __min(WetGain[i],MaxVolume);
- WetGain[i] = __max(WetGain[i],MinVolume);
- WetGainHF[i] = 1.0f;
-
- switch(ALSource->Send[i].WetFilter.type)
- {
- case AL_FILTER_LOWPASS:
- WetGain[i] *= ALSource->Send[i].WetFilter.Gain;
- WetGainHF[i] *= ALSource->Send[i].WetFilter.GainHF;
- break;
- }
-
ALSource->Params.Send[i].WetGain = WetGain[i] * ListenerGain;
- }
/* Update filter coefficients. Calculations based on the I3DL2
* spec. */
@@ -336,7 +333,6 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
* square root of the squared gain, which is the same as the base
* gain. */
ALSource->Params.iirFilter.coeff = lpCoeffCalc(DryGainHF, cw);
-
for(i = 0;i < NumSends;i++)
{
/* We use a one-pole filter, so we need to take the squared gain */
@@ -355,13 +351,17 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
ALfloat ConeVolume,ConeHF,SourceVolume,ListenerGain;
ALfloat DopplerFactor, DopplerVelocity, SpeedOfSound;
ALfloat AirAbsorptionFactor;
+ ALfloat RoomAirAbsorption[MAX_SENDS];
ALbufferlistitem *BufferListItem;
ALfloat Attenuation, EffectiveDist;
ALfloat RoomAttenuation[MAX_SENDS];
ALfloat MetersPerUnit;
+ ALfloat RoomRolloffBase;
ALfloat RoomRolloff[MAX_SENDS];
+ ALfloat DecayDistance[MAX_SENDS];
ALfloat DryGain;
ALfloat DryGainHF;
+ ALboolean DryGainHFAuto;
ALfloat WetGain[MAX_SENDS];
ALfloat WetGainHF[MAX_SENDS];
ALboolean WetGainAuto;
@@ -395,21 +395,55 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
memcpy(Position, ALSource->vPosition, sizeof(ALSource->vPosition));
memcpy(Direction, ALSource->vOrientation, sizeof(ALSource->vOrientation));
memcpy(Velocity, ALSource->vVelocity, sizeof(ALSource->vVelocity));
+ MinDist = ALSource->flRefDistance;
+ MaxDist = ALSource->flMaxDistance;
+ Rolloff = ALSource->flRollOffFactor;
InnerAngle = ALSource->flInnerAngle * ConeScale;
OuterAngle = ALSource->flOuterAngle * ConeScale;
+ AirAbsorptionFactor = ALSource->AirAbsorptionFactor;
+ DryGainHFAuto = ALSource->DryGainHFAuto;
WetGainAuto = ALSource->WetGainAuto;
WetGainHFAuto = ALSource->WetGainHFAuto;
- AirAbsorptionFactor = ALSource->AirAbsorptionFactor;
- Rolloff = ALSource->RoomRolloffFactor;
+ RoomRolloffBase = ALSource->RoomRolloffFactor;
for(i = 0;i < NumSends;i++)
{
- RoomRolloff[i] = Rolloff;
- if(ALSource->Send[i].Slot && IsReverbEffect(ALSource->Send[i].Slot->effect.type))
- RoomRolloff[i] += ALSource->Send[i].Slot->effect.Params.Reverb.RoomRolloffFactor;
+ ALeffectslot *Slot = ALSource->Send[i].Slot;
+
+ if(!Slot || Slot->effect.type == AL_EFFECT_NULL)
+ {
+ RoomRolloff[i] = 0.0f;
+ DecayDistance[i] = 0.0f;
+ RoomAirAbsorption[i] = 0.0f;
+ WetGainAuto = AL_FALSE;
+ WetGainHFAuto = AL_FALSE;
+ }
+ else if(Slot->AuxSendAuto)
+ {
+ RoomRolloff[i] = RoomRolloffBase;
+ if(IsReverbEffect(Slot->effect.type))
+ {
+ RoomRolloff[i] += Slot->effect.Params.Reverb.RoomRolloffFactor;
+ DecayDistance[i] = Slot->effect.Params.Reverb.DecayTime *
+ SPEEDOFSOUNDMETRESPERSEC;
+ RoomAirAbsorption[i] = Slot->effect.Params.Reverb.AirAbsorptionGainHF;
+ }
+ else
+ {
+ DecayDistance[i] = 0.0f;
+ RoomAirAbsorption[i] = 0.0f;
+ }
+ }
+ else
+ {
+ /* If the slot's auxiliary send auto is off, the data sent to the
+ * effect slot is the same as the dry path, sans filter effects */
+ RoomRolloff[i] = Rolloff;
+ DecayDistance[i] = 0.0f;
+ RoomAirAbsorption[i] = AIRABSORBGAINHF;
+ WetGainAuto = AL_TRUE;
+ WetGainHFAuto = DryGainHFAuto;
+ }
}
- MinDist = ALSource->flRefDistance;
- MaxDist = ALSource->flMaxDistance;
- Rolloff = ALSource->flRollOffFactor;
//1. Translate Listener to origin (convert to head relative)
if(ALSource->bHeadRelative == AL_FALSE)
@@ -517,16 +551,22 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
break;
}
- EffectiveDist = 0.0f;
- if(MinDist > 0.0f && Attenuation < 1.0f)
- EffectiveDist = (MinDist/Attenuation - MinDist)*MetersPerUnit;
-
// Source Gain + Attenuation
DryGain = SourceVolume * Attenuation;
+ for(i = 0;i < NumSends;i++)
+ WetGain[i] = SourceVolume * RoomAttenuation[i];
// Distance-based air absorption
+ EffectiveDist = 0.0f;
+ if(MinDist > 0.0f && Attenuation < 1.0f)
+ EffectiveDist = (MinDist/Attenuation - MinDist)*MetersPerUnit;
if(AirAbsorptionFactor > 0.0f && EffectiveDist > 0.0f)
+ {
DryGainHF *= aluPow(AIRABSORBGAINHF, AirAbsorptionFactor*EffectiveDist);
+ for(i = 0;i < NumSends;i++)
+ WetGainHF[i] *= aluPow(RoomAirAbsorption[i],
+ AirAbsorptionFactor*EffectiveDist);
+ }
//3. Apply directional soundcones
Angle = aluAcos(aluDotproduct(Direction,SourceToListener)) * (180.0/M_PI);
@@ -548,62 +588,39 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
}
DryGain *= ConeVolume;
- if(ALSource->DryGainHFAuto)
+ if(WetGainAuto)
+ {
+ for(i = 0;i < NumSends;i++)
+ WetGain[i] *= ConeVolume;
+ }
+ if(DryGainHFAuto)
DryGainHF *= ConeHF;
+ if(WetGainHFAuto)
+ {
+ for(i = 0;i < NumSends;i++)
+ WetGain[i] *= ConeHF;
+ }
// Clamp to Min/Max Gain
DryGain = __min(DryGain,MaxVolume);
DryGain = __max(DryGain,MinVolume);
-
for(i = 0;i < NumSends;i++)
{
- ALeffectslot *Slot = ALSource->Send[i].Slot;
-
- if(!Slot || Slot->effect.type == AL_EFFECT_NULL)
- {
- ALSource->Params.Send[i].WetGain = 0.0f;
- WetGainHF[i] = 1.0f;
- continue;
- }
-
- if(Slot->AuxSendAuto)
- {
- WetGain[i] = SourceVolume * RoomAttenuation[i];
- if(WetGainAuto)
- WetGain[i] *= ConeVolume;
- if(WetGainHFAuto)
- WetGainHF[i] *= ConeHF;
-
- // Clamp to Min/Max Gain
- WetGain[i] = __min(WetGain[i],MaxVolume);
- WetGain[i] = __max(WetGain[i],MinVolume);
-
- if(IsReverbEffect(Slot->effect.type))
- {
- /* Apply a decay-time transformation to the wet path, based on
- * the attenuation of the dry path.
- *
- * Using the approximate (effective) source to listener
- * distance, the initial decay of the reverb effect is
- * calculated and applied to the wet path.
- */
- if(WetGainAuto)
- WetGain[i] *= aluPow(0.001f, /* -60dB */
- (1.0f/SPEEDOFSOUNDMETRESPERSEC)*EffectiveDist /
- Slot->effect.Params.Reverb.DecayTime);
-
- WetGainHF[i] *= aluPow(Slot->effect.Params.Reverb.AirAbsorptionGainHF,
- AirAbsorptionFactor * EffectiveDist);
- }
- }
- else
- {
- /* If the slot's auxiliary send auto is off, the data sent to the
- * effect slot is the same as the dry path, sans filter effects */
- WetGain[i] = DryGain;
- WetGainHF[i] = DryGainHF;
- }
+ WetGain[i] = __min(WetGain[i],MaxVolume);
+ WetGain[i] = __max(WetGain[i],MinVolume);
+ }
+ // Apply filter gains and filters
+ switch(ALSource->DirectFilter.type)
+ {
+ case AL_FILTER_LOWPASS:
+ DryGain *= ALSource->DirectFilter.Gain;
+ DryGainHF *= ALSource->DirectFilter.GainHF;
+ break;
+ }
+ DryGain *= ListenerGain;
+ for(i = 0;i < NumSends;i++)
+ {
switch(ALSource->Send[i].WetFilter.type)
{
case AL_FILTER_LOWPASS:
@@ -611,18 +628,25 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
WetGainHF[i] *= ALSource->Send[i].WetFilter.GainHF;
break;
}
- ALSource->Params.Send[i].WetGain = WetGain[i] * ListenerGain;
+ WetGain[i] *= ListenerGain;
}
- // Apply filter gains and filters
- switch(ALSource->DirectFilter.type)
+ if(WetGainAuto)
{
- case AL_FILTER_LOWPASS:
- DryGain *= ALSource->DirectFilter.Gain;
- DryGainHF *= ALSource->DirectFilter.GainHF;
- break;
+ /* Apply a decay-time transformation to the wet path, based on the
+ * attenuation of the dry path.
+ *
+ * Using the approximate (effective) source to listener distance, the
+ * initial decay of the reverb effect is calculated and applied to the
+ * wet path.
+ */
+ for(i = 0;i < NumSends;i++)
+ {
+ if(DecayDistance[i] > 0.0f)
+ WetGain[i] *= aluPow(0.001f /* -60dB */,
+ EffectiveDist / DecayDistance[i]);
+ }
}
- DryGain *= ListenerGain;
// Calculate Velocity
Pitch = ALSource->flPitch;
@@ -740,6 +764,8 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
ALSource->Params.DryGains[0][chan] = DryGain * gain;
}
}
+ for(i = 0;i < NumSends;i++)
+ ALSource->Params.Send[i].WetGain = WetGain[i];
/* Update filter coefficients. */
cw = cos(2.0*M_PI * LOWPASSFREQCUTOFF / Frequency);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 21:39:32 +0000