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Do a simplified update for reverb when not fading

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This commit is contained in:
Chris Robinson 2022-08-29 22:32:49 -07:00
parent 42aab714a1
commit 1c49b7a1c6
1 changed files with 48 additions and 49 deletions
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97
alc/effects/reverb.cpp
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@ -894,18 +894,6 @@ void LateReverb::updateLines(const float density_mult, const float diffusion,
length = LATE_LINE_LENGTHS[i] * density_mult;
Offset[i][1] = float2uint(length*frequency + 0.5f);
if(i == 0)
{
/* Limit the modulation depth to avoid underflowing the read offset. */
if(Offset[0][1] <= MAX_UPDATE_SAMPLES)
Mod.Depth[1] = 0.0f;
else
{
const auto maxdepth = static_cast<float>(Offset[0][1] - MAX_UPDATE_SAMPLES);
if(Mod.Depth[1] > maxdepth) Mod.Depth[1] = maxdepth;
}
}
/* Approximate the absorption that the vector all-pass would exhibit
* given the current diffusion so we don't have to process a full T60
* filter for each of its four lines. Also include the average
@ -1073,30 +1061,6 @@ void ReverbState::update(const ContextBase *Context, const EffectSlot *Slot,
const DeviceBase *Device{Context->mDevice};
const auto frequency = static_cast<float>(Device->Frequency);
/* Calculate the master filters */
float hf0norm{minf(props->Reverb.HFReference/frequency, 0.49f)};
mFilter[0].Lp.setParamsFromSlope(BiquadType::HighShelf, hf0norm, props->Reverb.GainHF, 1.0f);
float lf0norm{minf(props->Reverb.LFReference/frequency, 0.49f)};
mFilter[0].Hp.setParamsFromSlope(BiquadType::LowShelf, lf0norm, props->Reverb.GainLF, 1.0f);
for(size_t i{1u};i < NUM_LINES;i++)
{
mFilter[i].Lp.copyParamsFrom(mFilter[0].Lp);
mFilter[i].Hp.copyParamsFrom(mFilter[0].Hp);
}
/* The density-based room size (delay length) multiplier. */
const float density_mult{CalcDelayLengthMult(props->Reverb.Density)};
/* Update the main effect delay and associated taps. */
updateDelayLine(props->Reverb.ReflectionsDelay, props->Reverb.LateReverbDelay,
density_mult, props->Reverb.DecayTime, frequency);
/* Update the early lines. */
mEarly.updateLines(density_mult, props->Reverb.Diffusion, props->Reverb.DecayTime, frequency);
/* Get the mixing matrix coefficients. */
CalcMatrixCoeffs(props->Reverb.Diffusion, &mMixX, &mMixY);
/* If the HF limit parameter is flagged, calculate an appropriate limit
* based on the air absorption parameter.
*/
@ -1111,19 +1075,6 @@ void ReverbState::update(const ContextBase *Context, const EffectSlot *Slot,
MinDecayTime, MaxDecayTime)};
const float hfDecayTime{clampf(props->Reverb.DecayTime*hfRatio, MinDecayTime, MaxDecayTime)};
/* Update the modulator rate and depth. */
mLate.Mod.updateModulator(props->Reverb.ModulationTime, props->Reverb.ModulationDepth,
frequency);
/* Update the late lines. */
mLate.updateLines(density_mult, props->Reverb.Diffusion, lfDecayTime,
props->Reverb.DecayTime, hfDecayTime, lf0norm, hf0norm, frequency);
/* Update early and late 3D panning. */
const float gain{props->Reverb.Gain * Slot->Gain * ReverbBoost};
update3DPanning(props->Reverb.ReflectionsPan, props->Reverb.LateReverbPan,
props->Reverb.ReflectionsGain*gain, props->Reverb.LateReverbGain*gain, target);
/* Determine if delay-line cross-fading is required. Density is essentially
* a master control for the feedback delays, so changes the offsets of many
* delay lines.
@ -1156,6 +1107,54 @@ void ReverbState::update(const ContextBase *Context, const EffectSlot *Slot,
mParams.HFReference = props->Reverb.HFReference;
mParams.LFReference = props->Reverb.LFReference;
}
/* Calculate the master filters */
float hf0norm{minf(props->Reverb.HFReference/frequency, 0.49f)};
mFilter[0].Lp.setParamsFromSlope(BiquadType::HighShelf, hf0norm, props->Reverb.GainHF, 1.0f);
float lf0norm{minf(props->Reverb.LFReference/frequency, 0.49f)};
mFilter[0].Hp.setParamsFromSlope(BiquadType::LowShelf, lf0norm, props->Reverb.GainLF, 1.0f);
for(size_t i{1u};i < NUM_LINES;i++)
{
mFilter[i].Lp.copyParamsFrom(mFilter[0].Lp);
mFilter[i].Hp.copyParamsFrom(mFilter[0].Hp);
}
/* Update early and late 3D panning. */
const float gain{props->Reverb.Gain * Slot->Gain * ReverbBoost};
update3DPanning(props->Reverb.ReflectionsPan, props->Reverb.LateReverbPan,
props->Reverb.ReflectionsGain*gain, props->Reverb.LateReverbGain*gain, target);
if(!mDoFading)
{
/* The density-based room size (delay length) multiplier. */
const float density_mult{CalcDelayLengthMult(mParams.Density)};
/* Update the main effect delay and associated taps. */
updateDelayLine(props->Reverb.ReflectionsDelay, props->Reverb.LateReverbDelay,
density_mult, mParams.DecayTime, frequency);
}
else
{
const float density_mult{CalcDelayLengthMult(props->Reverb.Density)};
updateDelayLine(props->Reverb.ReflectionsDelay, props->Reverb.LateReverbDelay,
density_mult, props->Reverb.DecayTime, frequency);
/* Update the early lines. */
mEarly.updateLines(density_mult, props->Reverb.Diffusion, props->Reverb.DecayTime,
frequency);
/* Get the mixing matrix coefficients. */
CalcMatrixCoeffs(props->Reverb.Diffusion, &mMixX, &mMixY);
/* Update the modulator rate and depth. */
mLate.Mod.updateModulator(props->Reverb.ModulationTime, props->Reverb.ModulationDepth,
frequency);
/* Update the late lines. */
mLate.updateLines(density_mult, props->Reverb.Diffusion, lfDecayTime,
props->Reverb.DecayTime, hfDecayTime, lf0norm, hf0norm, frequency);
}
}