static ALvoid EchoUpdate(ALeffectState *effect, ALCdevice *Device, const ALeffectslot *Slot)
{
ALechoState *state = (ALechoState*)effect;
ALuint frequency = Device->Frequency;
ALfloat lrpan, cw, g, gain;
ALfloat dirGain;
ALuint i;
state->Tap[0].delay = fastf2u(Slot->effect.Echo.Delay * frequency) + 1;
state->Tap[1].delay = fastf2u(Slot->effect.Echo.LRDelay * frequency);
state->Tap[1].delay += state->Tap[0].delay;
lrpan = Slot->effect.Echo.Spread;
state->FeedGain = Slot->effect.Echo.Feedback;
cw = aluCos(F_PI*2.0f * LOWPASSFREQREF / frequency);
g = 1.0f - Slot->effect.Echo.Damping;
state->iirFilter.coeff = lpCoeffCalc(g, cw);
gain = Slot->Gain;
for(i = 0;i < MAXCHANNELS;i++)
{
state->Gain[0][i] = 0.0f;
state->Gain[1][i] = 0.0f;
}
dirGain = aluFabs(lrpan);
/* First tap panning */
ComputeAngleGains(Device, aluAtan2(-lrpan, 0.0f), (1.0f-dirGain)*F_PI, gain, state->Gain[0]);
/* Second tap panning */
ComputeAngleGains(Device, aluAtan2(+lrpan, 0.0f), (1.0f-dirGain)*F_PI, gain, state->Gain[1]);
}
static ALvoid ALchorusState_update(ALchorusState *state, ALCdevice *Device, const ALeffectslot *Slot)
{
ALfloat frequency = (ALfloat)Device->Frequency;
ALfloat rate;
ALint phase;
switch(Slot->EffectProps.Chorus.Waveform)
{
case AL_CHORUS_WAVEFORM_TRIANGLE:
state->waveform = CWF_Triangle;
break;
case AL_CHORUS_WAVEFORM_SINUSOID:
state->waveform = CWF_Sinusoid;
break;
}
state->depth = Slot->EffectProps.Chorus.Depth;
state->feedback = Slot->EffectProps.Chorus.Feedback;
state->delay = fastf2i(Slot->EffectProps.Chorus.Delay * frequency);
/* Gains for left and right sides */
ComputeAngleGains(Device, atan2f(-1.0f, 0.0f), 0.0f, Slot->Gain, state->Gain[0]);
ComputeAngleGains(Device, atan2f(+1.0f, 0.0f), 0.0f, Slot->Gain, state->Gain[1]);
phase = Slot->EffectProps.Chorus.Phase;
rate = Slot->EffectProps.Chorus.Rate;
if(!(rate > 0.0f))
{
state->lfo_scale = 0.0f;
state->lfo_range = 1;
state->lfo_disp = 0;
}
else
{
/* Calculate LFO coefficient */
state->lfo_range = fastf2u(frequency/rate + 0.5f);
switch(state->waveform)
{
case CWF_Triangle:
state->lfo_scale = 4.0f / state->lfo_range;
break;
case CWF_Sinusoid:
state->lfo_scale = F_2PI / state->lfo_range;
break;
}
/* Calculate lfo phase displacement */
state->lfo_disp = fastf2i(state->lfo_range * (phase/360.0f));
}
}
static ALvoid ALdedicatedState_update(ALdedicatedState *state, ALCdevice *device, const ALeffectslot *Slot)
{
ALfloat Gain;
ALsizei s;
Gain = Slot->Gain * Slot->EffectProps.Dedicated.Gain;
if(Slot->EffectType == AL_EFFECT_DEDICATED_DIALOGUE)
ComputeAngleGains(device, atan2f(0.0f, 1.0f), 0.0f, Gain, state->gains);
else if(Slot->EffectType == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT)
{
for(s = 0;s < MaxChannels;s++)
state->gains[s] = 0.0f;
state->gains[LFE] = Gain;
}
}
ALvoid CalcNonAttnSourceParams(ALvoice *voice, const ALsource *ALSource, const ALCcontext *ALContext)
{
static const struct ChanMap MonoMap[1] = {
{ FrontCenter, 0.0f, 0.0f }
}, StereoMap[2] = {
{ FrontLeft, DEG2RAD(-30.0f), DEG2RAD(0.0f) },
{ FrontRight, DEG2RAD( 30.0f), DEG2RAD(0.0f) }
}, StereoWideMap[2] = {
{ FrontLeft, DEG2RAD(-90.0f), DEG2RAD(0.0f) },
{ FrontRight, DEG2RAD( 90.0f), DEG2RAD(0.0f) }
}, RearMap[2] = {
{ BackLeft, DEG2RAD(-150.0f), DEG2RAD(0.0f) },
{ BackRight, DEG2RAD( 150.0f), DEG2RAD(0.0f) }
}, QuadMap[4] = {
{ FrontLeft, DEG2RAD( -45.0f), DEG2RAD(0.0f) },
{ FrontRight, DEG2RAD( 45.0f), DEG2RAD(0.0f) },
{ BackLeft, DEG2RAD(-135.0f), DEG2RAD(0.0f) },
{ BackRight, DEG2RAD( 135.0f), DEG2RAD(0.0f) }
}, X51Map[6] = {
{ FrontLeft, DEG2RAD( -30.0f), DEG2RAD(0.0f) },
{ FrontRight, DEG2RAD( 30.0f), DEG2RAD(0.0f) },
{ FrontCenter, DEG2RAD( 0.0f), DEG2RAD(0.0f) },
{ LFE, 0.0f, 0.0f },
{ SideLeft, DEG2RAD(-110.0f), DEG2RAD(0.0f) },
{ SideRight, DEG2RAD( 110.0f), DEG2RAD(0.0f) }
}, X61Map[7] = {
{ FrontLeft, DEG2RAD(-30.0f), DEG2RAD(0.0f) },
{ FrontRight, DEG2RAD( 30.0f), DEG2RAD(0.0f) },
{ FrontCenter, DEG2RAD( 0.0f), DEG2RAD(0.0f) },
{ LFE, 0.0f, 0.0f },
{ BackCenter, DEG2RAD(180.0f), DEG2RAD(0.0f) },
{ SideLeft, DEG2RAD(-90.0f), DEG2RAD(0.0f) },
{ SideRight, DEG2RAD( 90.0f), DEG2RAD(0.0f) }
}, X71Map[8] = {
{ FrontLeft, DEG2RAD( -30.0f), DEG2RAD(0.0f) },
{ FrontRight, DEG2RAD( 30.0f), DEG2RAD(0.0f) },
{ FrontCenter, DEG2RAD( 0.0f), DEG2RAD(0.0f) },
{ LFE, 0.0f, 0.0f },
{ BackLeft, DEG2RAD(-150.0f), DEG2RAD(0.0f) },
{ BackRight, DEG2RAD( 150.0f), DEG2RAD(0.0f) },
{ SideLeft, DEG2RAD( -90.0f), DEG2RAD(0.0f) },
{ SideRight, DEG2RAD( 90.0f), DEG2RAD(0.0f) }
};
ALCdevice *Device = ALContext->Device;
ALfloat SourceVolume,ListenerGain,MinVolume,MaxVolume;
ALbufferlistitem *BufferListItem;
enum FmtChannels Channels;
ALfloat DryGain, DryGainHF, DryGainLF;
ALfloat WetGain[MAX_SENDS];
ALfloat WetGainHF[MAX_SENDS];
ALfloat WetGainLF[MAX_SENDS];
ALuint NumSends, Frequency;
ALboolean Relative;
const struct ChanMap *chans = NULL;
ALuint num_channels = 0;
ALboolean DirectChannels;
ALboolean isbformat = AL_FALSE;
ALfloat Pitch;
ALuint i, j, c;
/* Get device properties */
NumSends = Device->NumAuxSends;
Frequency = Device->Frequency;
/* Get listener properties */
ListenerGain = ALContext->Listener->Gain;
/* Get source properties */
SourceVolume = ALSource->Gain;
MinVolume = ALSource->MinGain;
MaxVolume = ALSource->MaxGain;
Pitch = ALSource->Pitch;
Relative = ALSource->HeadRelative;
DirectChannels = ALSource->DirectChannels;
voice->Direct.OutBuffer = Device->DryBuffer;
voice->Direct.OutChannels = Device->NumChannels;
for(i = 0;i < NumSends;i++)
{
ALeffectslot *Slot = ALSource->Send[i].Slot;
if(!Slot && i == 0)
Slot = Device->DefaultSlot;
if(!Slot || Slot->EffectType == AL_EFFECT_NULL)
voice->Send[i].OutBuffer = NULL;
else
voice->Send[i].OutBuffer = Slot->WetBuffer;
}
/* Calculate the stepping value */
Channels = FmtMono;
BufferListItem = ATOMIC_LOAD(&ALSource->queue);
while(BufferListItem != NULL)
{
ALbuffer *ALBuffer;
if((ALBuffer=BufferListItem->buffer) != NULL)
{
Pitch = Pitch * ALBuffer->Frequency / Frequency;
if(Pitch > (ALfloat)MAX_PITCH)
voice->Step = MAX_PITCH<<FRACTIONBITS;
else
{
voice->Step = fastf2i(Pitch*FRACTIONONE);
if(voice->Step == 0)
voice->Step = 1;
}
Channels = ALBuffer->FmtChannels;
break;
}
BufferListItem = BufferListItem->next;
}
/* Calculate gains */
DryGain = clampf(SourceVolume, MinVolume, MaxVolume);
DryGain *= ALSource->Direct.Gain * ListenerGain;
DryGainHF = ALSource->Direct.GainHF;
DryGainLF = ALSource->Direct.GainLF;
for(i = 0;i < NumSends;i++)
{
WetGain[i] = clampf(SourceVolume, MinVolume, MaxVolume);
WetGain[i] *= ALSource->Send[i].Gain * ListenerGain;
WetGainHF[i] = ALSource->Send[i].GainHF;
WetGainLF[i] = ALSource->Send[i].GainLF;
}
switch(Channels)
{
case FmtMono:
chans = MonoMap;
num_channels = 1;
break;
case FmtStereo:
/* HACK: Place the stereo channels at +/-90 degrees when using non-
* HRTF stereo output. This helps reduce the "monoization" caused
* by them panning towards the center. */
if(Device->FmtChans == DevFmtStereo && !Device->Hrtf)
chans = StereoWideMap;
else
chans = StereoMap;
num_channels = 2;
break;
case FmtRear:
chans = RearMap;
num_channels = 2;
break;
case FmtQuad:
chans = QuadMap;
num_channels = 4;
break;
case FmtX51:
chans = X51Map;
num_channels = 6;
break;
case FmtX61:
chans = X61Map;
num_channels = 7;
break;
case FmtX71:
chans = X71Map;
num_channels = 8;
break;
case FmtBFormat2D:
num_channels = 3;
isbformat = AL_TRUE;
DirectChannels = AL_FALSE;
break;
case FmtBFormat3D:
num_channels = 4;
isbformat = AL_TRUE;
DirectChannels = AL_FALSE;
break;
}
if(isbformat)
{
ALfloat N[3], V[3], U[3];
aluMatrix matrix;
/* AT then UP */
N[0] = ALSource->Orientation[0][0];
N[1] = ALSource->Orientation[0][1];
N[2] = ALSource->Orientation[0][2];
aluNormalize(N);
V[0] = ALSource->Orientation[1][0];
V[1] = ALSource->Orientation[1][1];
V[2] = ALSource->Orientation[1][2];
aluNormalize(V);
if(!Relative)
{
const aluMatrix *lmatrix = &ALContext->Listener->Params.Matrix;
aluVector at, up;
aluVectorSet(&at, N[0], N[1], N[2], 0.0f);
aluVectorSet(&up, V[0], V[1], V[2], 0.0f);
aluMatrixVector(&at, lmatrix);
aluMatrixVector(&up, lmatrix);
N[0] = at.v[0]; N[1] = at.v[1]; N[2] = at.v[2];
V[0] = up.v[0]; V[1] = up.v[1]; V[2] = up.v[2];
}
/* Build and normalize right-vector */
aluCrossproduct(N, V, U);
aluNormalize(U);
aluMatrixSet(&matrix,
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, -N[2], -N[0], N[1],
0.0f, U[2], U[0], -U[1],
0.0f, -V[2], -V[0], V[1]
);
for(c = 0;c < num_channels;c++)
{
MixGains *gains = voice->Direct.Gains[c];
ALfloat Target[MAX_OUTPUT_CHANNELS];
ComputeBFormatGains(Device, matrix.m[c], DryGain, Target);
for(i = 0;i < MAX_OUTPUT_CHANNELS;i++)
gains[i].Target = Target[i];
}
UpdateDryStepping(&voice->Direct, num_channels, (voice->Direct.Moving ? 64 : 0));
voice->Direct.Moving = AL_TRUE;
voice->IsHrtf = AL_FALSE;
for(i = 0;i < NumSends;i++)
WetGain[i] *= 1.4142f;
}
else if(DirectChannels != AL_FALSE)
{
if(Device->Hrtf)
{
voice->Direct.OutBuffer += voice->Direct.OutChannels;
voice->Direct.OutChannels = 2;
for(c = 0;c < num_channels;c++)
{
MixGains *gains = voice->Direct.Gains[c];
for(j = 0;j < MAX_OUTPUT_CHANNELS;j++)
gains[j].Target = 0.0f;
if(chans[c].channel == FrontLeft)
gains[0].Target = DryGain;
else if(chans[c].channel == FrontRight)
gains[1].Target = DryGain;
}
}
else for(c = 0;c < num_channels;c++)
{
MixGains *gains = voice->Direct.Gains[c];
int idx;
for(j = 0;j < MAX_OUTPUT_CHANNELS;j++)
gains[j].Target = 0.0f;
if((idx=GetChannelIdxByName(Device, chans[c].channel)) != -1)
gains[idx].Target = DryGain;
}
UpdateDryStepping(&voice->Direct, num_channels, (voice->Direct.Moving ? 64 : 0));
voice->Direct.Moving = AL_TRUE;
voice->IsHrtf = AL_FALSE;
}
else if(Device->Hrtf_Mode == FullHrtf)
{
voice->Direct.OutBuffer += voice->Direct.OutChannels;
voice->Direct.OutChannels = 2;
for(c = 0;c < num_channels;c++)
{
if(chans[c].channel == LFE)
{
/* Skip LFE */
voice->Direct.Hrtf[c].Params.Delay[0] = 0;
voice->Direct.Hrtf[c].Params.Delay[1] = 0;
for(i = 0;i < HRIR_LENGTH;i++)
{
voice->Direct.Hrtf[c].Params.Coeffs[i][0] = 0.0f;
voice->Direct.Hrtf[c].Params.Coeffs[i][1] = 0.0f;
}
}
else
{
/* Get the static HRIR coefficients and delays for this
* channel. */
GetLerpedHrtfCoeffs(Device->Hrtf,
chans[c].elevation, chans[c].angle, 1.0f, DryGain,
voice->Direct.Hrtf[c].Params.Coeffs,
voice->Direct.Hrtf[c].Params.Delay);
}
}
voice->Direct.Counter = 0;
voice->Direct.Moving = AL_TRUE;
voice->IsHrtf = AL_TRUE;
}
else
{
for(c = 0;c < num_channels;c++)
{
MixGains *gains = voice->Direct.Gains[c];
ALfloat Target[MAX_OUTPUT_CHANNELS];
/* Special-case LFE */
if(chans[c].channel == LFE)
{
int idx;
for(i = 0;i < MAX_OUTPUT_CHANNELS;i++)
gains[i].Target = 0.0f;
if((idx=GetChannelIdxByName(Device, chans[c].channel)) != -1)
gains[idx].Target = DryGain;
continue;
}
ComputeAngleGains(Device, chans[c].angle, chans[c].elevation, DryGain, Target);
for(i = 0;i < MAX_OUTPUT_CHANNELS;i++)
gains[i].Target = Target[i];
}
UpdateDryStepping(&voice->Direct, num_channels, (voice->Direct.Moving ? 64 : 0));
voice->Direct.Moving = AL_TRUE;
voice->IsHrtf = AL_FALSE;
}
for(i = 0;i < NumSends;i++)
{
voice->Send[i].Gain.Target = WetGain[i];
UpdateWetStepping(&voice->Send[i], (voice->Send[i].Moving ? 64 : 0));
voice->Send[i].Moving = AL_TRUE;
}
{
ALfloat gainhf = maxf(0.01f, DryGainHF);
ALfloat gainlf = maxf(0.01f, DryGainLF);
ALfloat hfscale = ALSource->Direct.HFReference / Frequency;
ALfloat lfscale = ALSource->Direct.LFReference / Frequency;
for(c = 0;c < num_channels;c++)
{
voice->Direct.Filters[c].ActiveType = AF_None;
if(gainhf != 1.0f) voice->Direct.Filters[c].ActiveType |= AF_LowPass;
if(gainlf != 1.0f) voice->Direct.Filters[c].ActiveType |= AF_HighPass;
ALfilterState_setParams(
&voice->Direct.Filters[c].LowPass, ALfilterType_HighShelf, gainhf,
hfscale, 0.0f
);
ALfilterState_setParams(
&voice->Direct.Filters[c].HighPass, ALfilterType_LowShelf, gainlf,
lfscale, 0.0f
);
}
}
for(i = 0;i < NumSends;i++)
{
ALfloat gainhf = maxf(0.01f, WetGainHF[i]);
ALfloat gainlf = maxf(0.01f, WetGainLF[i]);
ALfloat hfscale = ALSource->Send[i].HFReference / Frequency;
ALfloat lfscale = ALSource->Send[i].LFReference / Frequency;
for(c = 0;c < num_channels;c++)
{
voice->Send[i].Filters[c].ActiveType = AF_None;
if(gainhf != 1.0f) voice->Send[i].Filters[c].ActiveType |= AF_LowPass;
if(gainlf != 1.0f) voice->Send[i].Filters[c].ActiveType |= AF_HighPass;
ALfilterState_setParams(
&voice->Send[i].Filters[c].LowPass, ALfilterType_HighShelf, gainhf,
hfscale, 0.0f
);
ALfilterState_setParams(
&voice->Send[i].Filters[c].HighPass, ALfilterType_LowShelf, gainlf,
lfscale, 0.0f
);
}
}
}
