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ADSR.cpp
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ADSR.cpp
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#include "plugin.hpp"
using namespace simd;
const float MIN_TIME = 1e-3f;
const float MAX_TIME = 10.f;
const float LAMBDA_BASE = MAX_TIME / MIN_TIME;
struct ADSR : Module {
enum ParamIds {
ATTACK_PARAM,
DECAY_PARAM,
SUSTAIN_PARAM,
RELEASE_PARAM,
NUM_PARAMS
};
enum InputIds {
ATTACK_INPUT,
DECAY_INPUT,
SUSTAIN_INPUT,
RELEASE_INPUT,
GATE_INPUT,
TRIG_INPUT,
NUM_INPUTS
};
enum OutputIds {
ENVELOPE_OUTPUT,
NUM_OUTPUTS
};
enum LightIds {
ATTACK_LIGHT,
DECAY_LIGHT,
SUSTAIN_LIGHT,
RELEASE_LIGHT,
NUM_LIGHTS
};
float_4 attacking[4] = {float_4::zero()};
float_4 env[4] = {0.f};
dsp::TSchmittTrigger<float_4> trigger[4];
dsp::ClockDivider cvDivider;
float_4 attackLambda[4] = {0.f};
float_4 decayLambda[4] = {0.f};
float_4 releaseLambda[4] = {0.f};
float_4 sustain[4] = {0.f};
dsp::ClockDivider lightDivider;
ADSR() {
config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS);
configParam(ATTACK_PARAM, 0.f, 1.f, 0.5f, "Attack", " ms", LAMBDA_BASE, MIN_TIME * 1000);
configParam(DECAY_PARAM, 0.f, 1.f, 0.5f, "Decay", " ms", LAMBDA_BASE, MIN_TIME * 1000);
configParam(SUSTAIN_PARAM, 0.f, 1.f, 0.5f, "Sustain", "%", 0, 100);
configParam(RELEASE_PARAM, 0.f, 1.f, 0.5f, "Release", " ms", LAMBDA_BASE, MIN_TIME * 1000);
cvDivider.setDivision(16);
lightDivider.setDivision(128);
}
void process(const ProcessArgs& args) override {
// 0.16-0.19 us serial
// 0.23 us serial with all lambdas computed
// 0.15-0.18 us serial with all lambdas computed with SSE
int channels = inputs[GATE_INPUT].getChannels();
// Compute lambdas
if (cvDivider.process()) {
float attackParam = params[ATTACK_PARAM].getValue();
float decayParam = params[DECAY_PARAM].getValue();
float sustainParam = params[SUSTAIN_PARAM].getValue();
float releaseParam = params[RELEASE_PARAM].getValue();
for (int c = 0; c < channels; c += 4) {
// CV
float_4 attack = attackParam + inputs[ATTACK_INPUT].getPolyVoltageSimd<float_4>(c) / 10.f;
float_4 decay = decayParam + inputs[DECAY_INPUT].getPolyVoltageSimd<float_4>(c) / 10.f;
float_4 sustain = sustainParam + inputs[SUSTAIN_INPUT].getPolyVoltageSimd<float_4>(c) / 10.f;
float_4 release = releaseParam + inputs[RELEASE_INPUT].getPolyVoltageSimd<float_4>(c) / 10.f;
attack = simd::clamp(attack, 0.f, 1.f);
decay = simd::clamp(decay, 0.f, 1.f);
sustain = simd::clamp(sustain, 0.f, 1.f);
release = simd::clamp(release, 0.f, 1.f);
attackLambda[c / 4] = simd::pow(LAMBDA_BASE, -attack) / MIN_TIME;
decayLambda[c / 4] = simd::pow(LAMBDA_BASE, -decay) / MIN_TIME;
releaseLambda[c / 4] = simd::pow(LAMBDA_BASE, -release) / MIN_TIME;
this->sustain[c / 4] = sustain;
}
}
float_4 gate[4];
for (int c = 0; c < channels; c += 4) {
// Gate
gate[c / 4] = inputs[GATE_INPUT].getVoltageSimd<float_4>(c) >= 1.f;
// Retrigger
float_4 triggered = trigger[c / 4].process(inputs[TRIG_INPUT].getPolyVoltageSimd<float_4>(c));
attacking[c / 4] = simd::ifelse(triggered, float_4::mask(), attacking[c / 4]);
// Get target and lambda for exponential decay
const float attackTarget = 1.2f;
float_4 target = simd::ifelse(gate[c / 4], simd::ifelse(attacking[c / 4], attackTarget, sustain[c / 4]), 0.f);
float_4 lambda = simd::ifelse(gate[c / 4], simd::ifelse(attacking[c / 4], attackLambda[c / 4], decayLambda[c / 4]), releaseLambda[c / 4]);
// Adjust env
env[c / 4] += (target - env[c / 4]) * lambda * args.sampleTime;
// Turn off attacking state if envelope is HIGH
attacking[c / 4] = simd::ifelse(env[c / 4] >= 1.f, float_4::zero(), attacking[c / 4]);
// Turn on attacking state if gate is LOW
attacking[c / 4] = simd::ifelse(gate[c / 4], attacking[c / 4], float_4::mask());
// Set output
outputs[ENVELOPE_OUTPUT].setVoltageSimd(10.f * env[c / 4], c);
}
outputs[ENVELOPE_OUTPUT].setChannels(channels);
// Lights
if (lightDivider.process()) {
lights[ATTACK_LIGHT].setBrightness(0);
lights[DECAY_LIGHT].setBrightness(0);
lights[SUSTAIN_LIGHT].setBrightness(0);
lights[RELEASE_LIGHT].setBrightness(0);
for (int c = 0; c < channels; c += 4) {
const float epsilon = 0.01f;
float_4 sustaining = (sustain[c / 4] <= env[c / 4]) & (env[c / 4] < sustain[c / 4] + epsilon);
float_4 resting = (env[c / 4] < epsilon);
if (simd::movemask(gate[c / 4] & attacking[c / 4]))
lights[ATTACK_LIGHT].setBrightness(1);
if (simd::movemask(gate[c / 4] & ~attacking[c / 4] & ~sustaining))
lights[DECAY_LIGHT].setBrightness(1);
if (simd::movemask(gate[c / 4] & ~attacking[c / 4] & sustaining))
lights[SUSTAIN_LIGHT].setBrightness(1);
if (simd::movemask(~gate[c / 4] & ~resting))
lights[RELEASE_LIGHT].setBrightness(1);
}
}
}
};
struct ADSRWidget : ModuleWidget {
ADSRWidget(ADSR* module) {
setModule(module);
setPanel(APP->window->loadSvg(asset::plugin(pluginInstance, "res/ADSR.svg")));
addChild(createWidget<ScrewSilver>(Vec(15, 0)));
addChild(createWidget<ScrewSilver>(Vec(box.size.x - 30, 0)));
addChild(createWidget<ScrewSilver>(Vec(15, 365)));
addChild(createWidget<ScrewSilver>(Vec(box.size.x - 30, 365)));
addParam(createParam<RoundLargeBlackKnob>(Vec(62, 57), module, ADSR::ATTACK_PARAM));
addParam(createParam<RoundLargeBlackKnob>(Vec(62, 124), module, ADSR::DECAY_PARAM));
addParam(createParam<RoundLargeBlackKnob>(Vec(62, 191), module, ADSR::SUSTAIN_PARAM));
addParam(createParam<RoundLargeBlackKnob>(Vec(62, 257), module, ADSR::RELEASE_PARAM));
addInput(createInput<PJ301MPort>(Vec(9, 63), module, ADSR::ATTACK_INPUT));
addInput(createInput<PJ301MPort>(Vec(9, 129), module, ADSR::DECAY_INPUT));
addInput(createInput<PJ301MPort>(Vec(9, 196), module, ADSR::SUSTAIN_INPUT));
addInput(createInput<PJ301MPort>(Vec(9, 263), module, ADSR::RELEASE_INPUT));
addInput(createInput<PJ301MPort>(Vec(9, 320), module, ADSR::GATE_INPUT));
addInput(createInput<PJ301MPort>(Vec(48, 320), module, ADSR::TRIG_INPUT));
addOutput(createOutput<PJ301MPort>(Vec(87, 320), module, ADSR::ENVELOPE_OUTPUT));
addChild(createLight<SmallLight<RedLight>>(Vec(94, 41), module, ADSR::ATTACK_LIGHT));
addChild(createLight<SmallLight<RedLight>>(Vec(94, 109), module, ADSR::DECAY_LIGHT));
addChild(createLight<SmallLight<RedLight>>(Vec(94, 175), module, ADSR::SUSTAIN_LIGHT));
addChild(createLight<SmallLight<RedLight>>(Vec(94, 242), module, ADSR::RELEASE_LIGHT));
}
};
Model* modelADSR = createModel<ADSR, ADSRWidget>("ADSR");