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Use dual-biquad processing for the equalizer effect

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This commit is contained in:
Chris Robinson 2020-05-26 18:08:57 -07:00
parent 9b63e2460c
commit f1612ce228
1 changed files with 6 additions and 8 deletions
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14
alc/effects/equalizer.cpp
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@ -155,17 +155,15 @@ void EqualizerState::update(const ALCcontext *context, const ALeffectslot *slot,
void EqualizerState::process(const size_t samplesToDo, const al::span<const FloatBufferLine> samplesIn, const al::span<FloatBufferLine> samplesOut)
{
const al::span<float> buffer{mSampleBuffer.data(), samplesToDo};
auto chandata = std::addressof(mChans[0]);
auto chan = std::addressof(mChans[0]);
for(const auto &input : samplesIn)
{
chandata->filter[0].process({input.data(), samplesToDo}, buffer.begin());
chandata->filter[1].process(buffer, buffer.begin());
chandata->filter[2].process(buffer, buffer.begin());
chandata->filter[3].process(buffer, buffer.begin());
const al::span<const float> inbuf{input.data(), samplesToDo};
DualBiquad{chan->filter[0], chan->filter[1]}.process(inbuf, buffer.begin());
DualBiquad{chan->filter[2], chan->filter[3]}.process(buffer, buffer.begin());
MixSamples(buffer, samplesOut, chandata->CurrentGains, chandata->TargetGains, samplesToDo,
0u);
++chandata;
MixSamples(buffer, samplesOut, chan->CurrentGains, chan->TargetGains, samplesToDo, 0u);
++chan;
}
}