BogaudioModules

BogaudioModules for VCV Rack
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commit ff3b0b51f9e7b0f7f3767f73023c1d8f817deda0
parent 05a6c3114c186452c1d277fcdcf43e6d760f2be5
Author: Matt Demanett <matt@demanett.net>
Date:   Wed,  5 Sep 2018 23:45:34 -0400

PRESOR: a compressor with features. #7

Diffstat:
M.gitignore | 1+
MMakefile | 15++++++++++++++-
Mbenchmarks/signal_benchmark.cpp | 10++++++++++
Ares-src/Pressor-src.svg | 430+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ares/Pressor.svg | 0
Asrc/Pressor.cpp | 243+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Asrc/Pressor.hpp | 86+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Msrc/bogaudio.cpp | 2++
Msrc/dsp/signal.cpp | 35+++++++++++++++++++++++++++++++----
Msrc/dsp/signal.hpp | 12++++++++++--
10 files changed, 827 insertions(+), 7 deletions(-)

diff --git a/.gitignore b/.gitignore @@ -36,4 +36,5 @@ benchmark testmain *.gp releasenote.md +plot plot.* diff --git a/Makefile b/Makefile @@ -41,4 +41,17 @@ testmain: $(TESTMAIN_OBJECTS) testmain_clean: rm -f testmain $(TESTMAIN_OBJECTS) -clean: benchmark_clean testmain_clean +PLOT_SOURCES = $(wildcard test/plot.cpp src/dsp/*cpp) +PLOT_OBJECTS = $(patsubst %, build/%.o, $(PLOT_SOURCES)) +PLOT_DEPS = $(patsubst %, build/%.d, $(PLOT_SOURCES)) +-include $(PLOT_DEPS) +plot: $(PLOT_OBJECTS) + $(CXX) -o $@ $^ +plotrun: plot + ./plot +plotrungp: plot + ./plot > plot.tmp && gnuplot -e "set yrange [0:20]; plot 'plot.tmp' using 1:2 with lines" +plot_clean: + rm -f plot $(PLOT_OBJECTS) + +clean: benchmark_clean testmain_clean plot_clean diff --git a/benchmarks/signal_benchmark.cpp b/benchmarks/signal_benchmark.cpp @@ -218,3 +218,13 @@ static void BM_Saturator(benchmark::State& state) { } } BENCHMARK(BM_Saturator); + +static void BM_CompressorSoftKnee(benchmark::State& state) { + int i = 0; + Compressor c; + for (auto _ : state) { + i = ++i % 15; + benchmark::DoNotOptimize(c.compressionDb((float)(i + 5), 10.0f, 2.0f, true)); + } +} +BENCHMARK(BM_CompressorSoftKnee); diff --git a/res-src/Pressor-src.svg b/res-src/Pressor-src.svg @@ -0,0 +1,430 @@ +<svg + version="1.1" + xmlns="http://www.w3.org/2000/svg" + xmlns:xlink="http://www.w3.org/1999/xlink" + width="225" + height="380" + viewBox="0 0 225 380" +> + <style> + text { + fill: #333; + font-family: 'Roboto', sans-serif; + font-weight: bold; + } + text.title { + font-family: 'Comfortaa', sans-serif; + font-weight: normal; + } + text.brand { + font-family: 'Audiowide', sans-serif; + font-weight: bold; + } + </style> + + <defs> + <symbol id="knob" viewBox="0 0 38px 38px"> + <g transform="translate(19 19)"> + <polyline points="-5,0 5,0" stroke-width="1" stroke="#00f" /> + <polyline points="0,-5 0,5" stroke-width="1" stroke="#00f" /> + <circle cx="0" cy="0" r="18.5" stroke-width="1" stroke="#00f" fill="none" /> + </g> + 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-1)" /> + <use xlink:href="#guide-compression" transform="translate(-13 -11)" /> + </g> + + <g transform="translate(10 141)"> + <g transform="translate(-1 0)"> + <!-- <rect width="51" height="10" fill="#f003" transform="translate(8 -15)" /> --> + <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(29 -100)" /> --> + <!-- <polyline points="0,13 270,13" stroke="#0f0" stroke-width="1" fill="none" /> --> + <text font-size="8pt" letter-spacing="2px" transform="translate(8 35) rotate(270)">ATTACK</text> + <use id="ATTACK_PARAM" xlink:href="#knob-medium" transform="translate(19 0)" /> + </g> + <use xlink:href="#knobguide-attack" transform="translate(8.5 -9.5)" /> + <g transform="translate(58 0)"> + <!-- <rect width="51" height="10" fill="#f003" transform="translate(8 -15)" /> --> + <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(29 -100)" /> --> + <text font-size="8pt" letter-spacing="2px" transform="translate(8 40) rotate(270)">RELEASE</text> + <use id="RELEASE_PARAM" xlink:href="#knob-medium" transform="translate(19 0)" /> + </g> + <use xlink:href="#knobguide-release" transform="translate(67.5 -9.5)" /> + <g transform="translate(117 0)"> + <!-- <rect widtq2h="51" height="10" fill="#f003" transform="translate(8 -15)" /> --> + <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(29 -100)" /> --> + <text font-size="8pt" letter-spacing="2px" transform="translate(8 43) rotate(270)">OUT GAIN</text> + <use id="OUTPUT_GAIN_PARAM" xlink:href="#knob-medium" transform="translate(19 0)" /> + </g> + <use xlink:href="#knobguide-outputgain" transform="translate(126.5 -9.5)" /> + <g transform="translate(189 0)"> + <!-- <rect width="5" height="24" fill="#0f0" transform="translate(-14 2)" /> --> + <text font-size="5pt" letter-spacing="1.5px" transform="translate(-8 30) rotate(270)">DETECT</text> + <text font-size="5pt" letter-spacing="2px" transform="translate(-2 -1)">RMS</text> + <use id="DECTECTOR_MODE_PARAM" xlink:href="#switch" transform="translate(0 2)" /> + <text font-size="5pt" letter-spacing="2px" transform="translate(-4 34)">PEAK</text> + </g> + </g> + + <g transform="translate(10 213)"> + <g transform="translate(-1 0)"> + <!-- <rect width="51" height="10" fill="#f003" transform="translate(8 -15)" /> --> + <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(29 -100)" /> --> + <!-- <polyline points="0,13 270,13" stroke="#0f0" stroke-width="1" fill="none" /> --> + <text font-size="8pt" letter-spacing="2px" transform="translate(8 38) rotate(270)">IN GAIN</text> + <use id="INPUT_GAIN_PARAM" xlink:href="#knob-medium" transform="translate(19 0)" /> + </g> + <use xlink:href="#knobguide-inputgain" transform="translate(8.5 -9.5)" /> + <g transform="translate(58 0)"> + <!-- <rect width="51" height="10" fill="#f003" transform="translate(8 -15)" /> --> + <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(29 -100)" /> --> + <text font-size="8pt" letter-spacing="2px" transform="translate(8 37) rotate(270)">IN/SIDE</text> + <use id="DETECTOR_MIX_PARAM" xlink:href="#knob-medium" transform="translate(19 0)" /> + </g> + <use xlink:href="#knobguide-detectormix" transform="translate(67.5 -9.5)" /> + <g transform="translate(117 0)"> + <!-- <rect width="51" height="10" fill="#f003" transform="translate(8 -15)" /> --> + <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(29 -100)" /> --> + <text font-size="8pt" letter-spacing="2px" transform="translate(8 40) rotate(270)">DRY/WET</text> + <use id="OUTPUT_MIX_PARAM" xlink:href="#knob-medium" transform="translate(19 0)" /> + </g> + <use xlink:href="#knobguide-outputmix" transform="translate(126.5 -9.5)" /> + <g transform="translate(189 0)"> + <!-- <rect width="5" height="24" fill="#0f0" transform="translate(-14 2)" /> --> + <text font-size="5pt" letter-spacing="2px" transform="translate(-8 25.5) rotate(270)">KNEE</text> + <text font-size="5pt" letter-spacing="2px" transform="translate(-4 -1)">SOFT</text> + <use id="KNEE_PARAM" xlink:href="#switch" transform="translate(0 2)" /> + <text font-size="5pt" letter-spacing="2px" transform="translate(-5 34)">HARD</text> + </g> + </g> + + <g transform="translate(0 269)"> + <rect width="205" height="91" rx="5" fill="#bbb" transform="translate(10 0)" /> + <rect width="137" height="91" rx="5" fill="#fafafa" transform="translate(10 0)" /> + <rect width="171" height="47" rx="5" fill="#fafafa" transform="translate(10 44)" /> + <rect width="10" height="10" fill="#fafafa" transform="translate(137 0)" /> + <rect width="10" height="10" fill="#fafafa" transform="translate(171 81)" /> + + <g transform="translate(10 0)"> + <g transform="translate(3 0)"> + <use id="LEFT_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(13 40)">L</text> + </g> + <g transform="translate(37 0)"> + <use id="SIDECHAIN_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(3 40)">SIDE</text> + </g> + <g transform="translate(71 0)"> + <use id="THRESHOLD_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(1.5 40)">TRSH</text> + </g> + <g transform="translate(105 0)"> + <use id="RATIO_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="1px" transform="translate(1.5 40)">RATIO</text> + </g> + <g transform="translate(139 0)"> + <use id="ENVELOPE_OUTPUT" xlink:href="#output" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(5.5 40)">ENV</text> + </g> + <g transform="translate(173 0)"> + <use id="LEFT_OUTPUT" xlink:href="#output" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(13 40)">L</text> + </g> + </g> + + <g transform="translate(10 44)"> + <g transform="translate(3 0)"> + <use id="RIGHT_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(13 40)">R</text> + </g> + <g transform="translate(37 0)"> + <use id="ATTACK_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(5.5 40)">ATT</text> + </g> + <g transform="translate(71 0)"> + <use id="RELEASE_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(5.4 40)">REL</text> + </g> + <g transform="translate(105 0)"> + <use id="OUTPUT_GAIN_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="1px" transform="translate(5.3 40)">OGN</text> + </g> + <g transform="translate(139 0)"> + <use id="OUTPUT_MIX_INPUT" xlink:href="#input" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(5 40)">D/W</text> + </g> + <g transform="translate(173 0)"> + <use id="RIGHT_OUTPUT" xlink:href="#output" transform="translate(3 5)" /> + <text font-size="6pt" letter-spacing="2px" transform="translate(12 40)">R</text> + </g> + </g> + </g> +</svg> diff --git a/res/Pressor.svg b/res/Pressor.svg Binary files differ. diff --git a/src/Pressor.cpp b/src/Pressor.cpp @@ -0,0 +1,243 @@ + +#include "Pressor.hpp" + +void Pressor::onReset() { + _modulationStep = modulationSteps; +} + +void Pressor::onSampleRateChange() { + _detectorRMS.setSampleRate(engineGetSampleRate()); + _modulationStep = modulationSteps; +} + +void Pressor::step() { + if (!( + outputs[LEFT_OUTPUT].active || + outputs[RIGHT_OUTPUT].active || + outputs[ENVELOPE_OUTPUT].active || + outputs[LEFT_INPUT].active || + outputs[RIGHT_INPUT].active || + outputs[SIDECHAIN_INPUT].active + )) { + return; + } + + ++_modulationStep; + if (_modulationStep >= modulationSteps) { + _modulationStep = 0; + + _thresholdDb = params[THRESHOLD_PARAM].value; + if (inputs[THRESHOLD_INPUT].active) { + _thresholdDb *= clamp(inputs[THRESHOLD_INPUT].value / 10.0f, 0.0f, 1.0f); + } + _thresholdDb *= 30.0f; + _thresholdDb -= 24.0f; + + float ratio = params[RATIO_PARAM].value; + if (inputs[RATIO_INPUT].active) { + ratio *= clamp(inputs[RATIO_INPUT].value / 10.0f, 0.0f, 1.0f); + } + if (_ratioKnob != ratio) { + _ratioKnob = ratio; + _ratio = powf(_ratioKnob, 1.5f); + _ratio = 1.0f - _ratio; + _ratio *= M_PI; + _ratio *= 0.25f; + _ratio = tanf(_ratio); + _ratio = 1.0f / _ratio; + } + + float sampleRate = engineGetSampleRate(); + float attack = params[ATTACK_PARAM].value; + if (inputs[ATTACK_INPUT].active) { + attack *= clamp(inputs[ATTACK_INPUT].value / 10.0f, 0.0f, 1.0f); + } + attack *= attack; + _attackSL.setParams(sampleRate, attack * 500.0f); + + float release = params[RELEASE_PARAM].value; + if (inputs[RELEASE_INPUT].active) { + release *= clamp(inputs[RELEASE_INPUT].value / 10.0f, 0.0f, 1.0f); + } + release *= release; + _releaseSL.setParams(sampleRate, release * 2000.0f); + + float inGain = params[INPUT_GAIN_PARAM].value * 12.0f; + if (_inGain != inGain) { + _inGain = inGain; + _inLevel = decibelsToAmplitude(_inGain); + } + + float outGain = params[OUTPUT_GAIN_PARAM].value; + if (inputs[OUTPUT_GAIN_INPUT].active) { + outGain = clamp(outGain + inputs[OUTPUT_GAIN_INPUT].value / 5.0f, 0.0f, 1.0f); + } + outGain *= 24.0f; + if (_outGain != outGain) { + _outGain = outGain; + _outLevel = decibelsToAmplitude(_outGain); + } + + _detectorMix.setParams(params[DETECTOR_MIX_PARAM].value, 0.0f, true); + + float outputMix = params[OUTPUT_MIX_PARAM].value; + if (inputs[OUTPUT_MIX_INPUT].active) { + outputMix *= clamp(inputs[OUTPUT_MIX_INPUT].value / 5.0f, -1.0f, 1.0f); + } + _outputMix.setParams(outputMix, 0.0f, true); + + _rmsDetector = params[DECTECTOR_MODE_PARAM].value > 0.5f; + + _softKnee = params[KNEE_PARAM].value > 0.5f; + } + + float leftInput = inputs[LEFT_INPUT].value * _inLevel; + float rightInput = inputs[RIGHT_INPUT].value * _inLevel; + float env = leftInput + rightInput; + if (inputs[SIDECHAIN_INPUT].active) { + env = _detectorMix.next(env, inputs[SIDECHAIN_INPUT].value); + } + if (_rmsDetector) { + env = _detectorRMS.next(env); + } + else { + env = abs(env); + } + if (env > _lastEnv) { + env = _attackSL.next(env, _lastEnv); + } + else { + env = _releaseSL.next(env, _lastEnv); + } + _lastEnv = env; + + float detectorDb = amplitudeToDecibels(env / 5.0f); + _compressionDb = _compressor.compressionDb(detectorDb, _thresholdDb, _ratio, _softKnee); + float compression = decibelsToAmplitude(-_compressionDb); + outputs[ENVELOPE_OUTPUT].value = env; + if (outputs[LEFT_OUTPUT].active) { + outputs[LEFT_OUTPUT].value = _saturator.next(_outputMix.next(leftInput, leftInput * compression * _outLevel)); + } + if (outputs[RIGHT_OUTPUT].active) { + outputs[RIGHT_OUTPUT].value = _saturator.next(_outputMix.next(rightInput, rightInput * compression * _outLevel)); + } +} + +struct CompressionDisplay : OpaqueWidget { + struct Level { + float db; + NVGcolor color; + Level(float db, const NVGcolor& color) : db(db), color(color) {} + }; + + const NVGcolor bgColor = nvgRGBA(0xaa, 0xaa, 0xaa, 0xff); + Pressor* _module; + std::vector<Level> _levels; + + CompressionDisplay(Pressor* module) : _module(module) { + auto color = nvgRGBA(0xff, 0xaa, 0x00, 0xff); + _levels.push_back(Level(30.0f, color)); + for (int i = 1; i <= 15; ++i) { + float db = 30.0f - i*2.0f; + _levels.push_back(Level(db, color)); // decibelsToColor(db - 15.0f))); + } + } + + void draw(NVGcontext* vg) override { + nvgSave(vg); + for (int i = 0; i < 80; i += 5) { + const Level& l = _levels.at(i / 5); + + nvgBeginPath(vg); + nvgRect(vg, 3, i + 1, 5, 4); + nvgFillColor(vg, bgColor); + nvgFill(vg); + if (_module->_compressionDb > l.db) { + nvgFillColor(vg, l.color); + nvgFill(vg); + } + } + nvgRestore(vg); + } +}; + +struct PressorWidget : ModuleWidget { + static constexpr int hp = 15; + + PressorWidget(Pressor* module) : ModuleWidget(module) { + box.size = Vec(RACK_GRID_WIDTH * hp, RACK_GRID_HEIGHT); + + { + SVGPanel *panel = new SVGPanel(); + panel->box.size = box.size; + panel->setBackground(SVG::load(assetPlugin(plugin, "res/Pressor.svg"))); + addChild(panel); + } + + { + auto display = new CompressionDisplay(module); + display->box.pos = Vec(208.0, 30.0 - 0.5); + display->box.size = Vec(18, 180); + addChild(display); + } + + addChild(Widget::create<ScrewSilver>(Vec(15, 0))); + addChild(Widget::create<ScrewSilver>(Vec(box.size.x - 30, 0))); + addChild(Widget::create<ScrewSilver>(Vec(15, 365))); + addChild(Widget::create<ScrewSilver>(Vec(box.size.x - 30, 365))); + + // generated by svg_widgets.rb + auto thresholdParamPosition = Vec(36.0, 53.0); + auto ratioParamPosition = Vec(125.0, 53.0); + auto attackParamPosition = Vec(28.0, 141.0); + auto releaseParamPosition = Vec(87.0, 141.0); + auto outputGainParamPosition = Vec(146.0, 141.0); + auto dectectorModeParamPosition = Vec(198.5, 142.5); + auto inputGainParamPosition = Vec(28.0, 213.0); + auto detectorMixParamPosition = Vec(87.0, 213.0); + auto outputMixParamPosition = Vec(146.0, 213.0); + auto kneeParamPosition = Vec(198.5, 214.5); + + auto leftInputPosition = Vec(16.0, 274.0); + auto sidechainInputPosition = Vec(50.0, 274.0); + auto thresholdInputPosition = Vec(84.0, 274.0); + auto ratioInputPosition = Vec(118.0, 274.0); + auto rightInputPosition = Vec(16.0, 318.0); + auto attackInputPosition = Vec(50.0, 318.0); + auto releaseInputPosition = Vec(84.0, 318.0); + auto outputGainInputPosition = Vec(118.0, 318.0); + auto outputMixInputPosition = Vec(152.0, 318.0); + + auto envelopeOutputPosition = Vec(152.0, 274.0); + auto leftOutputPosition = Vec(186.0, 274.0); + auto rightOutputPosition = Vec(186.0, 318.0); + // end generated by svg_widgets.rb + + addParam(ParamWidget::create<Knob38>(thresholdParamPosition, module, Pressor::THRESHOLD_PARAM, 0.0, 1.0, 0.8)); + addParam(ParamWidget::create<Knob38>(ratioParamPosition, module, Pressor::RATIO_PARAM, 0.0, 1.0, 0.552)); + addParam(ParamWidget::create<Knob26>(attackParamPosition, module, Pressor::ATTACK_PARAM, 0.0, 1.0, 0.316)); + addParam(ParamWidget::create<Knob26>(releaseParamPosition, module, Pressor::RELEASE_PARAM, 0.0, 1.0, 0.316)); + addParam(ParamWidget::create<Knob26>(outputGainParamPosition, module, Pressor::OUTPUT_GAIN_PARAM, 0.0, 1.0, 0.0)); + addParam(ParamWidget::create<Knob26>(outputMixParamPosition, module, Pressor::OUTPUT_MIX_PARAM, -1.0, 1.0, 1.0)); + addParam(ParamWidget::create<Knob26>(inputGainParamPosition, module, Pressor::INPUT_GAIN_PARAM, -1.0, 1.0, 0.0)); + addParam(ParamWidget::create<Knob26>(detectorMixParamPosition, module, Pressor::DETECTOR_MIX_PARAM, -1.0, 1.0, 0.0)); + addParam(ParamWidget::create<SliderSwitch2State14>(dectectorModeParamPosition, module, Pressor::DECTECTOR_MODE_PARAM, 0.0, 1.0, 1.0)); + addParam(ParamWidget::create<SliderSwitch2State14>(kneeParamPosition, module, Pressor::KNEE_PARAM, 0.0, 1.0, 1.0)); + + addInput(Port::create<Port24>(leftInputPosition, Port::INPUT, module, Pressor::LEFT_INPUT)); + addInput(Port::create<Port24>(sidechainInputPosition, Port::INPUT, module, Pressor::SIDECHAIN_INPUT)); + addInput(Port::create<Port24>(thresholdInputPosition, Port::INPUT, module, Pressor::THRESHOLD_INPUT)); + addInput(Port::create<Port24>(ratioInputPosition, Port::INPUT, module, Pressor::RATIO_INPUT)); + addInput(Port::create<Port24>(rightInputPosition, Port::INPUT, module, Pressor::RIGHT_INPUT)); + addInput(Port::create<Port24>(attackInputPosition, Port::INPUT, module, Pressor::ATTACK_INPUT)); + addInput(Port::create<Port24>(releaseInputPosition, Port::INPUT, module, Pressor::RELEASE_INPUT)); + addInput(Port::create<Port24>(outputGainInputPosition, Port::INPUT, module, Pressor::OUTPUT_GAIN_INPUT)); + addInput(Port::create<Port24>(outputMixInputPosition, Port::INPUT, module, Pressor::OUTPUT_MIX_INPUT)); + + addOutput(Port::create<Port24>(envelopeOutputPosition, Port::OUTPUT, module, Pressor::ENVELOPE_OUTPUT)); + addOutput(Port::create<Port24>(leftOutputPosition, Port::OUTPUT, module, Pressor::LEFT_OUTPUT)); + addOutput(Port::create<Port24>(rightOutputPosition, Port::OUTPUT, module, Pressor::RIGHT_OUTPUT)); + } +}; + +Model* modelPressor = createModel<Pressor, PressorWidget>("Bogaudio-Pressor", "Pressor", "stereo compressor", COMPRESSOR_TAG, DYNAMICS_TAG, EFFECT_TAG); diff --git a/src/Pressor.hpp b/src/Pressor.hpp @@ -0,0 +1,86 @@ +#pragma once + +#include "bogaudio.hpp" +#include "dsp/signal.hpp" + +using namespace bogaudio::dsp; + +extern Model* modelPressor; + +namespace bogaudio { + +struct Pressor : Module { + enum ParamsIds { + THRESHOLD_PARAM, + RATIO_PARAM, + ATTACK_PARAM, + RELEASE_PARAM, + OUTPUT_GAIN_PARAM, + OUTPUT_MIX_PARAM, + INPUT_GAIN_PARAM, + DETECTOR_MIX_PARAM, + DECTECTOR_MODE_PARAM, + KNEE_PARAM, + NUM_PARAMS + }; + + enum InputsIds { + LEFT_INPUT, + SIDECHAIN_INPUT, + THRESHOLD_INPUT, + RATIO_INPUT, + RIGHT_INPUT, + ATTACK_INPUT, + RELEASE_INPUT, + OUTPUT_GAIN_INPUT, + OUTPUT_MIX_INPUT, + NUM_INPUTS + }; + + enum OutputsIds { + ENVELOPE_OUTPUT, + LEFT_OUTPUT, + RIGHT_OUTPUT, + NUM_OUTPUTS + }; + + enum LightsIds { + NUM_LIGHTS + }; + + const int modulationSteps = 100; + int _modulationStep = 0; + float _thresholdDb = 0.0f; + float _ratio = 0.0f; + float _ratioKnob = -1.0f; + float _inGain = -1.0f; + float _inLevel = 0.0f; + float _outGain = -1.0f; + float _outLevel = 0.0f; + bool _rmsDetector = true; + bool _softKnee = true; + float _lastEnv = 0.0f; + float _compressionDb = 0.0f; + + SlewLimiter _attackSL; + SlewLimiter _releaseSL; + CrossFader _detectorMix; + CrossFader _outputMix; + RootMeanSquare _detectorRMS; + Compressor _compressor; + Saturator _saturator; + + Pressor() + : Module(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS) + , _detectorRMS(1000.0f, 1.0f, 50.0f) + { + onReset(); + onSampleRateChange(); + } + + void onReset() override; + void onSampleRateChange() override; + void step() override; +}; + +} // namespace bogaudio diff --git a/src/bogaudio.cpp b/src/bogaudio.cpp @@ -27,6 +27,7 @@ #include "Noise.hpp" #include "Offset.hpp" #include "Pan.hpp" +#include "Pressor.hpp" #include "Reftone.hpp" #include "SampleHold.hpp" #include "Shaper.hpp" @@ -103,6 +104,7 @@ void init(rack::Plugin *p) { p->addModel(modelBool); #ifdef EXPERIMENTAL p->addModel(modelCmp); + p->addModel(modelPressor); #endif p->addModel(modelCVD); p->addModel(modelFlipFlop); diff --git a/src/dsp/signal.cpp b/src/dsp/signal.cpp @@ -184,11 +184,11 @@ void SlewLimiter::setParams(float sampleRate, float milliseconds, float range) { _delta = range / ((milliseconds / 1000.0f) * sampleRate); } -float SlewLimiter::next(float sample) { - if (sample > _last) { - return _last = std::min(_last + _delta, sample); +float SlewLimiter::next(float sample, float last) { + if (sample > last) { + return std::min(last + _delta, sample); } - return _last = std::max(_last - _delta, sample); + return std::max(last - _delta, sample); } @@ -429,3 +429,30 @@ float Saturator::next(float sample) { } return saturation(x); } + + +float Compressor::compressionDb(float detectorDb, float thresholdDb, float ratio, bool softKnee) { + if (softKnee) { + float sDb = thresholdDb - softKneeDb; + if (detectorDb <= sDb) { + return 0.0f; + } + + float ix = softKneeDb * std::min(ratio, 1000.0f) + thresholdDb; + float iy = softKneeDb + thresholdDb; + float t = (detectorDb - sDb) / (ix - thresholdDb); + float px = t * (ix - thresholdDb) + thresholdDb; + float py = t * (iy - thresholdDb) + thresholdDb; + float s = (py - sDb) / (px - sDb); + float compressionDb = detectorDb - sDb; + compressionDb -= s * (detectorDb - sDb); + return compressionDb; + } + + if (detectorDb <= thresholdDb) { + return 0.0f; + } + float compressionDb = detectorDb - thresholdDb; + compressionDb -= compressionDb / ratio; + return compressionDb; +} diff --git a/src/dsp/signal.hpp b/src/dsp/signal.hpp @@ -123,8 +123,11 @@ struct SlewLimiter { setParams(sampleRate, milliseconds, range); } - void setParams(float sampleRate, float milliseconds = 1.0f, float range = 10.0f); - float next(float sample); + void setParams(float sampleRate = 1000.0f, float milliseconds = 1.0f, float range = 10.0f); + inline float next(float sample) { + return _last = next(sample, _last); + } + float next(float sample, float last); }; struct ShapedSlewLimiter { @@ -225,5 +228,10 @@ struct Saturator { float next(float sample); }; +struct Compressor { + const float softKneeDb = 3.0f; + float compressionDb(float detectorDb, float thresholdDb, float ratio, bool softKnee); +}; + } // namespace dsp } // namespace bogaudio