aboutsummaryrefslogtreecommitdiffstats
path: root/Alc/ALu.c
diff options
context:
space:
mode:
Diffstat (limited to 'Alc/ALu.c')
-rw-r--r--Alc/ALu.c73
1 files changed, 34 insertions, 39 deletions
diff --git a/Alc/ALu.c b/Alc/ALu.c
index b3e0ee94..0fca7a73 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -1054,12 +1054,9 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
const ALlistener *Listener = ALContext->Listener;
const ALsizei NumSends = Device->NumAuxSends;
aluVector Position, Velocity, Direction, SourceToListener;
- ALfloat Distance, ClampedDist;
- ALfloat DopplerFactor;
+ ALfloat Distance, ClampedDist, DopplerFactor;
ALfloat RoomAirAbsorption[MAX_SENDS];
ALeffectslot *SendSlots[MAX_SENDS];
- ALfloat Attenuation;
- ALfloat RoomAttenuation[MAX_SENDS];
ALfloat RoomRolloff[MAX_SENDS];
ALfloat DecayDistance[MAX_SENDS];
ALfloat DryGain, DryGainHF, DryGainLF;
@@ -1072,11 +1069,7 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
ALfloat Pitch;
ALint i;
- Pitch = 1.0f;
- aluVectorSet(&Position, props->Position[0], props->Position[1], props->Position[2], 1.0f);
- aluVectorSet(&Direction, props->Direction[0], props->Direction[1], props->Direction[2], 0.0f);
- aluVectorSet(&Velocity, props->Velocity[0], props->Velocity[1], props->Velocity[2], 0.0f);
-
+ /* Set mixing buffers and get send parameters. */
voice->Direct.Buffer = Device->Dry.Buffer;
voice->Direct.Channels = Device->Dry.NumChannels;
for(i = 0;i < NumSends;i++)
@@ -1120,6 +1113,9 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
}
/* Transform source to listener space (convert to head relative) */
+ aluVectorSet(&Position, props->Position[0], props->Position[1], props->Position[2], 1.0f);
+ aluVectorSet(&Direction, props->Direction[0], props->Direction[1], props->Direction[2], 0.0f);
+ aluVectorSet(&Velocity, props->Velocity[0], props->Velocity[1], props->Velocity[2], 0.0f);
if(props->HeadRelative == AL_FALSE)
{
const aluMatrixf *Matrix = &Listener->Params.Matrix;
@@ -1144,12 +1140,20 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
SourceToListener.v[3] = 0.0f;
Distance = aluNormalize(SourceToListener.v);
+ /* Initial source gain */
+ DryGain = props->Gain;
+ DryGainHF = 1.0f;
+ DryGainLF = 1.0f;
+ for(i = 0;i < NumSends;i++)
+ {
+ WetGain[i] = props->Gain;
+ WetGainHF[i] = 1.0f;
+ WetGainLF[i] = 1.0f;
+ }
+
/* Calculate distance attenuation */
ClampedDist = Distance;
- Attenuation = 1.0f;
- for(i = 0;i < NumSends;i++)
- RoomAttenuation[i] = 1.0f;
switch(Listener->Params.SourceDistanceModel ?
props->DistanceModel : Listener->Params.DistanceModel)
{
@@ -1162,11 +1166,11 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
if(props->RefDistance > 0.0f)
{
ALfloat dist = lerp(props->RefDistance, ClampedDist, props->RolloffFactor);
- if(dist > 0.0f) Attenuation = props->RefDistance / dist;
+ if(dist > 0.0f) DryGain *= props->RefDistance / dist;
for(i = 0;i < NumSends;i++)
{
dist = lerp(props->RefDistance, ClampedDist, RoomRolloff[i]);
- if(dist > 0.0f) RoomAttenuation[i] = props->RefDistance / dist;
+ if(dist > 0.0f) WetGain[i] *= props->RefDistance / dist;
}
}
break;
@@ -1179,14 +1183,14 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
case LinearDistance:
if(props->MaxDistance != props->RefDistance)
{
- Attenuation = props->RolloffFactor * (ClampedDist-props->RefDistance) /
+ ALfloat attn = props->RolloffFactor * (ClampedDist-props->RefDistance) /
(props->MaxDistance-props->RefDistance);
- Attenuation = maxf(1.0f - Attenuation, 0.0f);
+ DryGain *= maxf(1.0f - attn, 0.0f);
for(i = 0;i < NumSends;i++)
{
- RoomAttenuation[i] = RoomRolloff[i] * (ClampedDist-props->RefDistance) /
- (props->MaxDistance-props->RefDistance);
- RoomAttenuation[i] = maxf(1.0f - RoomAttenuation[i], 0.0f);
+ attn = RoomRolloff[i] * (ClampedDist-props->RefDistance) /
+ (props->MaxDistance-props->RefDistance);
+ WetGain[i] *= maxf(1.0f - attn, 0.0f);
}
}
break;
@@ -1199,9 +1203,9 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
case ExponentDistance:
if(ClampedDist > 0.0f && props->RefDistance > 0.0f)
{
- Attenuation = powf(ClampedDist/props->RefDistance, -props->RolloffFactor);
+ DryGain *= powf(ClampedDist/props->RefDistance, -props->RolloffFactor);
for(i = 0;i < NumSends;i++)
- RoomAttenuation[i] = powf(ClampedDist/props->RefDistance, -RoomRolloff[i]);
+ WetGain[i] *= powf(ClampedDist/props->RefDistance, -RoomRolloff[i]);
}
break;
@@ -1210,17 +1214,6 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
break;
}
- /* Source Gain + Attenuation */
- DryGain = props->Gain * Attenuation;
- DryGainHF = 1.0f;
- DryGainLF = 1.0f;
- for(i = 0;i < NumSends;i++)
- {
- WetGain[i] = props->Gain * RoomAttenuation[i];
- WetGainHF[i] = 1.0f;
- WetGainLF[i] = 1.0f;
- }
-
/* Distance-based air absorption */
meters = (ClampedDist-props->RefDistance) * props->RolloffFactor *
Listener->Params.MetersPerUnit;
@@ -1294,19 +1287,21 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
/* Apply gain and frequency filters */
DryGain = clampf(DryGain, props->MinGain, props->MaxGain);
- DryGain *= props->Direct.Gain * Listener->Params.Gain;
- DryGain = minf(DryGain, GAIN_MIX_MAX);
+ DryGain = minf(DryGain*props->Direct.Gain*Listener->Params.Gain, GAIN_MIX_MAX);
DryGainHF *= props->Direct.GainHF;
DryGainLF *= props->Direct.GainLF;
for(i = 0;i < NumSends;i++)
{
WetGain[i] = clampf(WetGain[i], props->MinGain, props->MaxGain);
- WetGain[i] *= props->Send[i].Gain * Listener->Params.Gain;
- WetGain[i] = minf(WetGain[i], GAIN_MIX_MAX);
+ WetGain[i] = minf(WetGain[i]*props->Send[i].Gain*Listener->Params.Gain, GAIN_MIX_MAX);
WetGainHF[i] *= props->Send[i].GainHF;
WetGainLF[i] *= props->Send[i].GainLF;
}
+
+ /* Initial source pitch */
+ Pitch = props->Pitch;
+
/* Calculate velocity-based doppler effect */
DopplerFactor = props->DopplerFactor * Listener->Params.DopplerFactor;
if(DopplerFactor > 0.0f)
@@ -1328,10 +1323,10 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop
clampf(SpeedOfSound-VSS, 1.0f, SpeedOfSound*2.0f - 1.0f);
}
- /* Calculate fixed-point stepping value, based on the pitch, buffer
- * frequency, and output frequency.
+ /* Adjust pitch based on the buffer and output frequencies, and calculate
+ * fixed-point stepping value.
*/
- Pitch *= (ALfloat)ALBuffer->Frequency/(ALfloat)Device->Frequency * props->Pitch;
+ Pitch *= (ALfloat)ALBuffer->Frequency/(ALfloat)Device->Frequency;
if(Pitch > (ALfloat)MAX_PITCH)
voice->Step = MAX_PITCH<<FRACTIONBITS;
else
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 18:48:47 +0000