AuroraMiddleware/AuroraOpenALSoft
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Use fast float-to-int conversions for some mixer-related code

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This commit is contained in:
Chris Robinson 2011-09-29 06:55:00 -07:00
parent 3c27c24dec
commit 9e2600cac4
3 changed files with 20 additions and 20 deletions
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8
Alc/alcEcho.c
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@ -73,8 +73,8 @@ static ALboolean EchoDeviceUpdate(ALeffectState *effect, ALCdevice *Device)
// Use the next power of 2 for the buffer length, so the tap offsets can be
// wrapped using a mask instead of a modulo
maxlen = (ALuint)(AL_ECHO_MAX_DELAY * Device->Frequency) + 1;
maxlen += (ALuint)(AL_ECHO_MAX_LRDELAY * Device->Frequency) + 1;
maxlen = fastf2u(AL_ECHO_MAX_DELAY * Device->Frequency) + 1;
maxlen += fastf2u(AL_ECHO_MAX_LRDELAY * Device->Frequency) + 1;
maxlen = NextPowerOf2(maxlen);
if(maxlen != state->BufferLength)
@ -101,8 +101,8 @@ static ALvoid EchoUpdate(ALeffectState *effect, ALCcontext *Context, const ALeff
ALfloat lrpan, cw, g, gain;
ALuint i;
state->Tap[0].delay = (ALuint)(Slot->effect.Echo.Delay * frequency) + 1;
state->Tap[1].delay = (ALuint)(Slot->effect.Echo.LRDelay * frequency);
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*0.5f + 0.5f;

4
Alc/alcModulator.c
View File

@ -147,8 +147,8 @@ static ALvoid ModulatorUpdate(ALeffectState *effect, ALCcontext *Context, const
else if(Slot->effect.Modulator.Waveform == AL_RING_MODULATOR_SQUARE)
state->Waveform = SQUARE;
state->step = (ALuint)(Slot->effect.Modulator.Frequency*WAVEFORM_FRACONE /
Device->Frequency);
state->step = fastf2u(Slot->effect.Modulator.Frequency*WAVEFORM_FRACONE /
Device->Frequency);
if(state->step == 0) state->step = 1;
cw = aluCos(F_PI*2.0f * Slot->effect.Modulator.HighPassCutoff /

28
Alc/alcReverb.c
View File

@ -247,7 +247,7 @@ static __inline ALfloat EAXModulation(ALverbState *State, ALfloat in)
// Calculate the read offset and fraction between it and the next sample.
frac = (1.0f + (State->Mod.Filter * sinus));
offset = (ALuint)frac;
offset = fastf2u(frac);
frac -= offset;
// Get the two samples crossed by the offset, and feed the delay line
@ -610,7 +610,7 @@ static ALuint CalcLineLength(ALfloat length, ALintptrEXT offset, ALuint frequenc
// All line lengths are powers of 2, calculated from their lengths, with
// an additional sample in case of rounding errors.
samples = NextPowerOf2((ALuint)(length * frequency) + 1);
samples = NextPowerOf2(fastf2u(length * frequency) + 1);
// All lines share a single sample buffer.
Delay->Mask = samples - 1;
Delay->Line = (ALfloat*)offset;
@ -733,15 +733,15 @@ static ALboolean ReverbDeviceUpdate(ALeffectState *effect, ALCdevice *Device)
// so their offsets only need to be calculated once.
for(index = 0;index < 4;index++)
{
State->Early.Offset[index] = (ALuint)(EARLY_LINE_LENGTH[index] *
State->Early.Offset[index] = fastf2u(EARLY_LINE_LENGTH[index] *
frequency);
State->Late.ApOffset[index] = fastf2u(ALLPASS_LINE_LENGTH[index] *
frequency);
State->Late.ApOffset[index] = (ALuint)(ALLPASS_LINE_LENGTH[index] *
frequency);
}
// The echo all-pass filter line length is static, so its offset only
// needs to be calculated once.
State->Echo.ApOffset = (ALuint)(ECHO_ALLPASS_LENGTH * frequency);
State->Echo.ApOffset = fastf2u(ECHO_ALLPASS_LENGTH * frequency);
return AL_TRUE;
}
@ -864,9 +864,9 @@ static ALvoid UpdateModulator(ALfloat modTime, ALfloat modDepth, ALuint frequenc
*/
length = modTime * frequency;
if (length >= 1.0f) {
State->Mod.Index = (ALuint)(State->Mod.Index * length /
State->Mod.Range);
State->Mod.Range = (ALuint)length;
State->Mod.Index = fastf2u(State->Mod.Index * length /
State->Mod.Range);
State->Mod.Range = fastf2u(length);
} else {
State->Mod.Index = 0;
State->Mod.Range = 1;
@ -888,8 +888,8 @@ static ALvoid UpdateModulator(ALfloat modTime, ALfloat modDepth, ALuint frequenc
static ALvoid UpdateDelayLine(ALfloat earlyDelay, ALfloat lateDelay, ALuint frequency, ALverbState *State)
{
// Calculate the initial delay taps.
State->DelayTap[0] = (ALuint)(earlyDelay * frequency);
State->DelayTap[1] = (ALuint)((earlyDelay + lateDelay) * frequency);
State->DelayTap[0] = fastf2u(earlyDelay * frequency);
State->DelayTap[1] = fastf2u((earlyDelay + lateDelay) * frequency);
}
// Update the early reflections gain and line coefficients.
@ -926,7 +926,7 @@ static ALvoid UpdateDecorrelator(ALfloat density, ALuint frequency, ALverbState
{
length = (DECO_FRACTION * aluPow(DECO_MULTIPLIER, (ALfloat)index)) *
LATE_LINE_LENGTH[0] * (1.0f + (density * LATE_LINE_MULTIPLIER));
State->DecoTap[index] = (ALuint)(length * frequency);
State->DecoTap[index] = fastf2u(length * frequency);
}
}
@ -971,7 +971,7 @@ static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix
LATE_LINE_MULTIPLIER));
// Calculate the delay offset for each cyclical delay line.
State->Late.Offset[index] = (ALuint)(length * frequency);
State->Late.Offset[index] = fastf2u(length * frequency);
// Calculate the gain (coefficient) for each cyclical line.
State->Late.Coeff[index] = CalcDecayCoeff(length, decayTime);
@ -992,7 +992,7 @@ static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix
static ALvoid UpdateEchoLine(ALfloat reverbGain, ALfloat lateGain, ALfloat echoTime, ALfloat decayTime, ALfloat diffusion, ALfloat echoDepth, ALfloat hfRatio, ALfloat cw, ALuint frequency, ALverbState *State)
{
// Update the offset and coefficient for the echo delay line.
State->Echo.Offset = (ALuint)(echoTime * frequency);
State->Echo.Offset = fastf2u(echoTime * frequency);
// Calculate the decay coefficient for the echo line.
State->Echo.Coeff = CalcDecayCoeff(echoTime, decayTime);