git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce

subrepo:
  subdir:   "deps/juce"
  merged:   "b13f9084e"
upstream:
  origin:   "https://github.com/essej/JUCE.git"
  branch:   "sono6good"
  commit:   "b13f9084e"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

deps/juce/examples/Plugins/NoiseGatePluginDemo.h

@@ -0,0 +1,151 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE examples.
+   Copyright (c) 2020 - Raw Material Software Limited
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   THE SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
+   WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
+   PURPOSE, ARE DISCLAIMED.
+
+  ==============================================================================
+*/
+
+/*******************************************************************************
+ The block below describes the properties of this PIP. A PIP is a short snippet
+ of code that can be read by the Projucer and used to generate a JUCE project.
+
+ BEGIN_JUCE_PIP_METADATA
+
+ name:             NoiseGatePlugin
+ version:          1.0.0
+ vendor:           JUCE
+ website:          http://juce.com
+ description:      Noise gate audio plugin.
+
+ dependencies:     juce_audio_basics, juce_audio_devices, juce_audio_formats,
+                   juce_audio_plugin_client, juce_audio_processors,
+                   juce_audio_utils, juce_core, juce_data_structures,
+                   juce_events, juce_graphics, juce_gui_basics, juce_gui_extra
+ exporters:        xcode_mac, vs2019
+
+ moduleFlags:      JUCE_STRICT_REFCOUNTEDPOINTER=1
+
+ type:             AudioProcessor
+ mainClass:        NoiseGate
+
+ useLocalCopy:     1
+
+ END_JUCE_PIP_METADATA
+
+*******************************************************************************/
+
+#pragma once
+
+
+//==============================================================================
+class NoiseGate  : public AudioProcessor
+{
+public:
+    //==============================================================================
+    NoiseGate()
+        : AudioProcessor (BusesProperties().withInput  ("Input",     AudioChannelSet::stereo())
+                                           .withOutput ("Output",    AudioChannelSet::stereo())
+                                           .withInput  ("Sidechain", AudioChannelSet::stereo()))
+    {
+        addParameter (threshold = new AudioParameterFloat ("threshold", "Threshold", 0.0f, 1.0f, 0.5f));
+        addParameter (alpha     = new AudioParameterFloat ("alpha",     "Alpha",     0.0f, 1.0f, 0.8f));
+    }
+
+    //==============================================================================
+    bool isBusesLayoutSupported (const BusesLayout& layouts) const override
+    {
+        // the sidechain can take any layout, the main bus needs to be the same on the input and output
+        return layouts.getMainInputChannelSet() == layouts.getMainOutputChannelSet()
+                 && ! layouts.getMainInputChannelSet().isDisabled();
+    }
+
+    //==============================================================================
+    void prepareToPlay (double, int) override { lowPassCoeff = 0.0f; sampleCountDown = 0; }
+    void releaseResources() override {}
+
+    void processBlock (AudioBuffer<float>& buffer, MidiBuffer&) override
+    {
+        auto mainInputOutput = getBusBuffer (buffer, true, 0);
+        auto sideChainInput  = getBusBuffer (buffer, true, 1);
+
+        auto alphaCopy     = alpha->get();
+        auto thresholdCopy = threshold->get();
+
+        for (int j = 0; j < buffer.getNumSamples(); ++j)
+        {
+            auto mixedSamples = 0.0f;
+
+            for (int i = 0; i < sideChainInput.getNumChannels(); ++i)
+                mixedSamples += sideChainInput.getReadPointer (i)[j];
+
+            mixedSamples /= static_cast<float> (sideChainInput.getNumChannels());
+            lowPassCoeff = (alphaCopy * lowPassCoeff) + ((1.0f - alphaCopy) * mixedSamples);
+
+            if (lowPassCoeff >= thresholdCopy)
+                sampleCountDown = (int) getSampleRate();
+
+            // very in-effective way of doing this
+            for (int i = 0; i < mainInputOutput.getNumChannels(); ++i)
+                *mainInputOutput.getWritePointer (i, j) = sampleCountDown > 0 ? *mainInputOutput.getReadPointer (i, j) : 0.0f;
+
+            if (sampleCountDown > 0)
+                --sampleCountDown;
+        }
+    }
+
+    using AudioProcessor::processBlock;
+
+    //==============================================================================
+    AudioProcessorEditor* createEditor() override            { return new GenericAudioProcessorEditor (*this); }
+    bool hasEditor() const override                          { return true; }
+    const String getName() const override                    { return "NoiseGate"; }
+    bool acceptsMidi() const override                        { return false; }
+    bool producesMidi() const override                       { return false; }
+    double getTailLengthSeconds() const override             { return 0.0; }
+    int getNumPrograms() override                            { return 1; }
+    int getCurrentProgram() override                         { return 0; }
+    void setCurrentProgram (int) override                    {}
+    const String getProgramName (int) override               { return "None"; }
+    void changeProgramName (int, const String&) override     {}
+    bool isVST2() const noexcept                             { return (wrapperType == wrapperType_VST); }
+
+    //==============================================================================
+    void getStateInformation (MemoryBlock& destData) override
+    {
+        MemoryOutputStream stream (destData, true);
+
+        stream.writeFloat (*threshold);
+        stream.writeFloat (*alpha);
+    }
+
+    void setStateInformation (const void* data, int sizeInBytes) override
+    {
+        MemoryInputStream stream (data, static_cast<size_t> (sizeInBytes), false);
+
+        threshold->setValueNotifyingHost (stream.readFloat());
+        alpha->setValueNotifyingHost     (stream.readFloat());
+    }
+
+private:
+    //==============================================================================
+    AudioParameterFloat* threshold;
+    AudioParameterFloat* alpha;
+    int sampleCountDown;
+
+    float lowPassCoeff;
+
+    //==============================================================================
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NoiseGate)
+};