JUCE example

Maximilian @ 6c3d65be

-Subproject commit 1162c2a6e89b5adaea2685b3ff2b844aa9cacff4
+Subproject commit 6c3d65be199ec74753e61ec026284fd3ebc71faa

examples/JUCE/regression_synth/LICENSE

+Copyright (c) 2016, Goldsmiths Creative Computing (UK, London)
+All rights reserved.
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+   The above copyright notice and this permission notice shall be
+   included in all copies or substantial portions of the Software.
+   Neither the name of Goldsmiths nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,	
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file

examples/JUCE/regression_synth/Source/Main.cpp

+/*
+  ==============================================================================
+
+    This file was auto-generated!
+
+    It contains the basic startup code for a Juce application.
+
+  ==============================================================================
+*/
+
+#include "../JuceLibraryCode/JuceHeader.h"
+
+Component* createMainContentComponent();
+
+//==============================================================================
+class RAPID_JUCEApplication  : public JUCEApplication
+{
+public:
+    //==============================================================================
+    RAPID_JUCEApplication() {}
+
+    const String getApplicationName() override       { return ProjectInfo::projectName; }
+    const String getApplicationVersion() override    { return ProjectInfo::versionString; }
+    bool moreThanOneInstanceAllowed() override       { return true; }
+
+    //==============================================================================
+    void initialise (const String& commandLine) override
+    {
+        // This method is where you should put your application's initialisation code..
+
+        mainWindow = new MainWindow (getApplicationName());
+    }
+
+    void shutdown() override
+    {
+        // Add your application's shutdown code here..
+
+        mainWindow = nullptr; // (deletes our window)
+    }
+
+    //==============================================================================
+    void systemRequestedQuit() override
+    {
+        // This is called when the app is being asked to quit: you can ignore this
+        // request and let the app carry on running, or call quit() to allow the app to close.
+        quit();
+    }
+
+    void anotherInstanceStarted (const String& commandLine) override
+    {
+        // When another instance of the app is launched while this one is running,
+        // this method is invoked, and the commandLine parameter tells you what
+        // the other instance's command-line arguments were.
+    }
+
+    //==============================================================================
+    /*
+        This class implements the desktop window that contains an instance of
+        our MainContentComponent class.
+    */
+    class MainWindow    : public DocumentWindow
+    {
+    public:
+        MainWindow (String name)  : DocumentWindow (name,
+                                                    Colours::lightgrey,
+                                                    DocumentWindow::allButtons)
+        {
+            setUsingNativeTitleBar (true);
+            setContentOwned (createMainContentComponent(), true);
+            setResizable (true, true);
+
+            centreWithSize (getWidth(), getHeight());
+            setVisible (true);
+        }
+
+        void closeButtonPressed() override
+        {
+            // This is called when the user tries to close this window. Here, we'll just
+            // ask the app to quit when this happens, but you can change this to do
+            // whatever you need.
+            JUCEApplication::getInstance()->systemRequestedQuit();
+        }
+
+        /* Note: Be careful if you override any DocumentWindow methods - the base
+           class uses a lot of them, so by overriding you might break its functionality.
+           It's best to do all your work in your content component instead, but if
+           you really have to override any DocumentWindow methods, make sure your
+           subclass also calls the superclass's method.
+        */
+
+    private:
+        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainWindow)
+    };
+
+private:
+    ScopedPointer<MainWindow> mainWindow;
+};
+
+//==============================================================================
+// This macro generates the main() routine that launches the app.
+START_JUCE_APPLICATION (RAPID_JUCEApplication)

examples/JUCE/regression_synth/Source/MainComponent.cpp

+/*
+  ==============================================================================
+
+    This file was auto-generated!
+
+  ==============================================================================
+*/
+
+#ifndef MAINCOMPONENT_H_INCLUDED
+#define MAINCOMPONENT_H_INCLUDED
+
+// It's important to call any headers that might
+// include apple libs / headers before Juce's
+// to prevent ambigious classes
+#include "../../../../dependencies/Maximilian/maximilian.h"
+#include "../../../../dependencies/RapidLib/src/regression.h"
+#include <random>
+#include <array>
+#include "../JuceLibraryCode/JuceHeader.h"
+
+class MainContentComponent;
+
+//==============================================================================
+class Oscilloscope : public Component,
+                     private Timer
+{
+public:
+	Oscilloscope(MainContentComponent* _p) : parent(_p),
+		                                     writePosition(0),
+	                                         bufferSize(16384),
+	                                         paintSize(256)
+	{
+		startTimer(40);
+	}
+
+	void pushBuffer(const float* _sampleData, int _numSamples)
+	{
+		for (int i = 0; i < _numSamples; ++i)
+		{
+			size_t pos = ++writePosition % buffer.size();
+			oldBuffer[pos] = buffer[pos];
+			buffer[pos] = _sampleData[i];
+		}
+	}
+
+	void paint(Graphics& _g) override
+	{
+		boundary = getLocalBounds();
+		_g.fillAll(juce::Colour(0xff000000));
+		Path path;
+		path.startNewSubPath(0, .5 * boundary.getHeight());
+		const float bufferYScale = .3f;
+		int paintPos = 2;
+
+		while (paintPos < buffer.size())
+		{
+			if (isZeroCrossing(paintPos))
+			{
+				break;
+			}
+			++paintPos;
+		}
+
+		const int posOffset = paintPos;
+		while (paintPos < buffer.size())
+		{
+			float bufferPoint = buffer[paintPos];//0.5 * std::abs(buffer[paintPos] - oldBuffer[paintPos]);
+			Point<float> point((paintPos - posOffset) * boundary.getWidth() / paintSize,
+			                   0.5 * ((bufferYScale * bufferPoint) + 1) * boundary.getHeight());
+			path.lineTo(point);
+			++paintPos;
+		}
+		_g.setColour(juce::Colour(0xff00ff00));
+		_g.strokePath(path, PathStrokeType(2.0f));
+	}
+
+	void mouseDrag(const MouseEvent& _event) override;
+
+private:
+	//==========================================================================
+	void timerCallback() override
+	{
+		repaint();
+	}
+
+	bool isZeroCrossing(int i) const noexcept
+	{
+		jassert(i > 0);
+		return buffer[i] > buffer[i - 1] && buffer[i] > 0 && buffer[i - 1] < 0;
+	}
+
+	//==========================================================================
+	juce::Rectangle<int>                      boundary;
+	std::array<float, int((float)44100 / 83)> buffer;
+	std::array<float, int((float)44100 / 83)> oldBuffer;
+	std::size_t                               writePosition;
+	const int                                 bufferSize;
+	const int                                 paintSize;
+	MainContentComponent* const               parent;
+};
+
+//==============================================================================
+class MainContentComponent : public AudioAppComponent,
+	                         public Slider::Listener,
+	                         public Button::Listener
+{
+public:
+    //==========================================================================
+    /* Setup */
+	MainContentComponent():
+		modulationFrequency(4.1),
+		modulationDepth(.2),
+		centreFrequency(512),
+		resonance(2),
+        targetModulationFrequency(4.1),
+        targetModulationDepth(.2),
+        targetCentreFrequency(512),
+        targetResonance(2),
+        trained(false),
+		oscilloscope(this)
+    {
+		header.setColour(TextButton::buttonColourId, Colours::wheat);
+		header.setColour(TextButton::textColourOffId, Colours::white);
+        header.setEnabled(false);
+		header.setButtonText("Rapid API Example");
+		addAndMakeVisible(header);
+
+		sidebar.setColour(TextButton::buttonColourId, Colours::white);
+		sidebar.setColour(TextButton::textColourOffId, Colours::white);
+        sidebar.setEnabled(false);
+		addAndMakeVisible(sidebar);
+		
+		train.setColour(TextButton::buttonColourId, Colours::wheat);
+		train.setColour(TextButton::textColourOffId, Colours::white);
+		train.setButtonText("Train");
+		train.addListener(this);
+		addAndMakeVisible(train);
+
+		randomise.setColour(TextButton::buttonColourId, Colours::wheat);
+		randomise.setColour(TextButton::textColourOffId, Colours::white);
+		randomise.setButtonText("Randomise!");
+		randomise.addListener(this);
+		addAndMakeVisible(randomise);
+
+		footer.setColour(TextButton::buttonColourId, Colours::wheat);
+		footer.setColour(TextButton::textColourOffId, Colours::white);
+        footer.setEnabled(false);
+		footer.setButtonText("Select the synth parameters you like, then move the mouse to an area and hold space to associate that space with that sound. Repeat with a few sounds");
+		addAndMakeVisible(footer);
+        
+        modulationFrequencySlider.setRange(0, 4096);
+        modulationFrequencySlider.setSkewFactorFromMidPoint (500.0);
+        modulationFrequencySlider.setValue(modulationFrequency, dontSendNotification);
+        modulationFrequencySlider.addListener(this);
+        addAndMakeVisible(modulationFrequencySlider);
+        
+        modulationFrequencyLabel.setText("Mod Frequency", dontSendNotification);
+		modulationFrequencyLabel.setColour(Label::ColourIds::textColourId, Colours::white);
+        modulationFrequencyLabel.attachToComponent(&modulationFrequencySlider, false);
+        addAndMakeVisible(modulationFrequencyLabel);
+        
+        modulationIndexSlider.setRange(0., 1.);
+        modulationIndexSlider.setValue(modulationDepth, dontSendNotification);
+        modulationIndexSlider.addListener(this);
+        addAndMakeVisible(modulationIndexSlider);
+        
+        modulationIndexLabel.setText("Mod Index", dontSendNotification);
+		modulationFrequencyLabel.setColour(Label::ColourIds::textColourId, Colours::white);
+        modulationIndexLabel.attachToComponent(&modulationIndexSlider, false);
+        addAndMakeVisible(modulationIndexLabel);
+        
+        filterFrequencySlider.setRange(0.00001, 4096);
+		filterFrequencySlider.setColour(Label::ColourIds::textColourId, Colours::white);
+        filterFrequencySlider.setSkewFactorFromMidPoint (500.0);
+        filterFrequencySlider.setValue(centreFrequency, dontSendNotification);
+        filterFrequencySlider.addListener(this);
+        addAndMakeVisible(filterFrequencySlider);
+        
+        filterFrequencyLabel.setText("Filter Frequency", dontSendNotification);
+		filterFrequencyLabel.setColour(Label::ColourIds::textColourId, Colours::white);
+        filterFrequencyLabel.attachToComponent(&filterFrequencySlider, false);
+        addAndMakeVisible(filterFrequencyLabel);
+        
+        filterResonanceSlider.setRange(0.00001, 40);
+        filterResonanceSlider.setValue(resonance, dontSendNotification);
+        filterResonanceSlider.addListener(this);
+        addAndMakeVisible(filterResonanceSlider);
+        
+        filterResonanceLabel.setText("Filter Resonance", dontSendNotification);
+		filterResonanceLabel.setColour(Label::ColourIds::textColourId, Colours::white);
+        filterResonanceLabel.attachToComponent(&filterResonanceSlider, false);
+        addAndMakeVisible(filterResonanceLabel);
+
+		addAndMakeVisible(oscilloscope);
+
+        setSize (800, 600);
+
+        // No inputs, two outputs
+        setAudioChannels (0, 2);
+    }
+    
+    ~MainContentComponent()
+    {
+        shutdownAudio();
+    }
+
+	//==========================================================================
+    /* Audio Methods */
+	void prepareToPlay (int _samplesPerBlockExpected, double _sampleRate) override
+    {
+		// Remember this is part of the audio callback so we must be careful
+		// not to do anything silly like allocating memory or dare I say wait
+		// for locks!
+		maxiSettings::setup(std::round(_sampleRate), 2, _samplesPerBlockExpected);
+    }
+
+    void getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill) override
+    {
+		int periodLength = int(maxiSettings::sampleRate / 83);
+		// Get the buffers for both output channels
+		float* const bufferL = bufferToFill.buffer->getWritePointer(0, bufferToFill.startSample);
+		float* const bufferR = bufferToFill.buffer->getWritePointer(1, bufferToFill.startSample);
+        
+        const double localTargetModulationFrequency = targetModulationFrequency;
+        const double localTargetModulationDepth = targetModulationDepth;
+        const double localTargetCentreFrequency = targetCentreFrequency;
+        const double localTargetResonance = targetResonance;
+        
+        const double modulationFrequencyDelta = (localTargetModulationFrequency != modulationFrequency) ? (targetModulationFrequency - modulationFrequency) / bufferToFill.numSamples : 0;
+		const double modulationDepthDelta     = (localTargetModulationDepth != modulationDepth)         ? (targetModulationDepth - modulationDepth) / bufferToFill.numSamples         : 0;
+        const double centreFrequencyDelta     = (localTargetCentreFrequency != centreFrequency)         ? (targetCentreFrequency - centreFrequency) / bufferToFill.numSamples         : 0;
+        const double resonanceDelta           = (localTargetResonance != resonance)                     ? (targetResonance - resonance) / bufferToFill.numSamples                     : 0;
+        
+		// Create our FM Maximilian noises and send the mixed output to the channels
+		for (int sample = 0; sample < bufferToFill.numSamples; ++sample)
+		{
+            modulationFrequency += modulationFrequencyDelta;
+            modulationDepth += modulationDepthDelta;
+            centreFrequency += centreFrequencyDelta;
+            resonance += resonanceDelta;
+            
+			const double modulatorFrame = (modulator.sinewave(modulationFrequency) + 1.0) / 2.0 * modulationDepth + (1 - modulationDepth);
+			const double carrierFrame = carrier.pulse(83, modulatorFrame);
+			const double filteredFrame = filter.lores(carrierFrame, centreFrequency, resonance);
+
+			mixer.stereo(filteredFrame, outputs, .5);
+			bufferL[sample] = float(outputs[0]);
+			bufferR[sample] = float(outputs[1]);
+		}
+        
+        modulationFrequency = localTargetModulationFrequency;
+        modulationDepth = localTargetModulationDepth;
+        centreFrequency = localTargetCentreFrequency;
+        resonance = localTargetResonance;
+
+		oscilloscope.pushBuffer(bufferL, bufferToFill.numSamples);
+    }
+
+    void releaseResources() override {}
+
+	//==========================================================================
+    /* Graphics, GUI */
+	void paint (Graphics& _g) override
+    {
+        // (Our component is opaque, so we must completely fill the background with a solid colour)
+        _g.fillAll (Colour::fromRGB(40, 40, 40));
+        
+    }
+    
+    // This is called once at startup and then everytime the window is resized
+	// Essentially all the code here just subdivides the available window space
+    void resized() override
+    {
+		juce::Rectangle<int> area(getLocalBounds());
+
+		const int headerFooterHeight = 36;
+		header.setBounds(area.removeFromTop(headerFooterHeight));
+		footer.setBounds(area.removeFromBottom(headerFooterHeight));
+
+		const int sidebarWidth = jmax(100, area.getWidth() / 4);
+		juce::Rectangle<int> sidebarArea(area.removeFromLeft(sidebarWidth));
+		sidebar.setBounds(sidebarArea);
+
+		const int drawingWidth = area.getWidth();
+		drawingArea = area.removeFromRight(drawingWidth);
+
+		oscilloscope.setBounds(drawingArea.reduced(int(sidebarWidth / 4.0)));
+
+		const int sideItemHeight = 40;
+		const int sideItemMargin = 5;
+
+		train.setBounds(sidebarArea.removeFromTop(sideItemHeight).reduced(sideItemMargin));
+		randomise.setBounds(sidebarArea.removeFromBottom(sideItemHeight).reduced(sideItemMargin));
+        filterResonanceSlider.setBounds(sidebarArea.removeFromBottom(sideItemHeight).reduced(2.5*sideItemMargin));
+        filterFrequencySlider.setBounds(sidebarArea.removeFromBottom(sideItemHeight).reduced(2.5*sideItemMargin));
+        modulationIndexSlider.setBounds(sidebarArea.removeFromBottom(sideItemHeight).reduced(2.5*sideItemMargin));
+        modulationFrequencySlider.setBounds(sidebarArea.removeFromBottom(sideItemHeight).reduced(2.5*sideItemMargin));
+        
+	}
+
+	//==========================================================================
+	/* Interaction events via mouse and keyboard */
+
+	void mouseDrag(const MouseEvent& _event) override
+	{
+		if (trained)
+		{
+			std::vector<double> input = normaliseMouseSpace(_event.position.roundToInt(), drawingArea);
+			std::vector<double> output = rapidRegression.run(input);
+            
+            targetModulationFrequency = output[0];
+            targetModulationDepth     = output[1];
+            targetCentreFrequency     = output[2];
+            targetResonance           = output[3];
+            modulationFrequencySlider.setValue(targetModulationFrequency, dontSendNotification);
+            modulationIndexSlider.setValue(targetModulationDepth, dontSendNotification);
+            filterFrequencySlider.setValue(targetCentreFrequency, dontSendNotification);
+            filterResonanceSlider.setValue(targetResonance, dontSendNotification);
+		}
+		else
+		{
+            
+			AlertWindow::showMessageBoxAsync(AlertWindow::AlertIconType::WarningIcon, "Error", "Please train the model before trying to run it!", "ok");
+		}
+	}
+
+	void mouseMove(const MouseEvent& _event) override
+	{
+		if (KeyPress::isKeyCurrentlyDown(KeyPress::spaceKey))
+		{
+			std::vector<double> input = normaliseMouseSpace(_event.position.roundToInt(), drawingArea);
+            trainingExample<double> example;
+			example.input = { input[0], input[1] };
+			example.output = { modulationFrequency, modulationDepth, centreFrequency, resonance };
+			trainingSet.push_back(example);
+            
+            // only do once...
+            if (input.size() > 0)
+            {
+                footer.setButtonText("When you have finished recorded the sounds you want, press train!");
+            }
+		}
+	}
+
+	std::vector<double> normaliseMouseSpace(const juce::Point<int>& _position, const juce::Rectangle<int>& _area)
+	{
+		juce::Point<int> pos = _area.getConstrainedPoint(_position);
+		std::vector<double> temp;
+		temp.resize(2);
+		temp[0] = double(double(pos.getX() - _area.getX()) / _area.getWidth());
+ 		temp[1] = double(double(pos.getY() - _area.getY()) / _area.getHeight());
+        return temp;
+	}
+
+	void sliderValueChanged(Slider* _slider) override
+	{
+        if (_slider == &modulationFrequencySlider)
+            targetModulationFrequency = modulationFrequencySlider.getValue();
+        else if (_slider == &modulationIndexSlider)
+            targetModulationDepth = modulationIndexSlider.getValue();
+        else if (_slider == &filterFrequencySlider)
+            targetCentreFrequency = filterFrequencySlider.getValue();
+        else if (_slider == &filterResonanceSlider)
+            targetResonance = filterResonanceSlider.getValue();
+	}
+
+	void buttonClicked(Button* _button) override
+	{
+		if (_button == &train)
+		{
+			if (trainingSet.size() > 2) 
+			{
+				trained = rapidRegression.train(trainingSet);
+                
+                footer.setButtonText("Now just drag the mouse to play!");
+			}
+			else
+			{
+				AlertWindow::showMessageBoxAsync(AlertWindow::AlertIconType::WarningIcon, "Error", "Please record more audio and mouse coordinate examples before training!\n\nYou can add examples by choosing mouse coordinates with the current sound and holding space whilst wiggling the mouse", "ok");
+			}
+		}
+		else if (_button == &randomise)
+		{
+			std::random_device random;
+			std::default_random_engine generator(random());
+			std::uniform_real_distribution<double> distribution(0.0, 1.0);
+
+			targetModulationFrequency = 4096 * distribution(generator);
+			targetModulationDepth = distribution(generator);
+			targetCentreFrequency = 4096 * distribution(generator);
+			targetResonance = 40 * distribution(generator);
+            
+            modulationFrequencySlider.setValue(targetModulationFrequency, dontSendNotification);
+            modulationIndexSlider.setValue(targetModulationDepth, dontSendNotification);
+            filterFrequencySlider.setValue(targetCentreFrequency, dontSendNotification);
+            filterResonanceSlider.setValue(targetResonance, dontSendNotification);
+
+		}
+	}
+
+
+private:
+	//==========================================================================
+	/*** AUDIO ***/
+
+    // FM Synthesis private parameters
+    double                       modulationFrequency;
+    double                       modulationDepth;
+    double                       centreFrequency;
+    double                       resonance;
+    double                       targetModulationFrequency;
+    double                       targetModulationDepth;
+    double                       targetCentreFrequency;
+    double                       targetResonance;
+    double                       outputs[2];
+
+	// Maximilian objects
+	maxiOsc                      carrier;
+	maxiOsc                      modulator;
+	maxiFilter                   filter;
+	maxiMix                      mixer;
+
+    //==========================================================================
+	/*** MACHINE LEARNING ***/
+
+	// Rapid regression
+	regression<double>                   rapidRegression;
+	std::vector<trainingExample<double> > trainingSet;
+
+	// Program state
+	bool                         trained;
+
+    //==========================================================================
+	/*** GUI ***/
+
+	// Layout
+	TextButton                   header;
+	TextButton                   sidebar;
+	TextButton                   footer;
+	juce::Rectangle<int>         drawingArea;
+	
+	// Rapidmix
+	TextButton                   train;
+
+	// Maximilian
+	Slider                       modulationFrequencySlider;
+	Label                        modulationFrequencyLabel;
+	Slider                       modulationIndexSlider;
+	Label                        modulationIndexLabel;
+	Slider                       filterFrequencySlider;
+	Label                        filterFrequencyLabel;
+	Slider                       filterResonanceSlider;
+	Label                        filterResonanceLabel;
+	TextButton                   randomise;
+    
+    //==========================================================================
+    /*** GRAPHICS ***/
+	Oscilloscope                 oscilloscope;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
+};
+
+void Oscilloscope::mouseDrag(const MouseEvent& _event)
+{
+	parent->mouseDrag(_event);
+}
+
+// (This function is called by the app startup code to create our main component)
+Component* createMainContentComponent()     { return new MainContentComponent(); }