sine: added project

sine/Source/Main.cpp

@@ -0,0 +1,102 @@
+/*
+  ==============================================================================
+
+    This file was auto-generated!
+
+    It contains the basic startup code for a Juce application.
+
+  ==============================================================================
+*/
+
+#include "../JuceLibraryCode/JuceHeader.h"
+
+Component* createMainContentComponent();
+
+//==============================================================================
+class sineApplication  : public JUCEApplication
+{
+public:
+    //==============================================================================
+    sineApplication() {}
+
+    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,
+                                                    Desktop::getInstance().getDefaultLookAndFeel()
+                                                                          .findColour (ResizableWindow::backgroundColourId),
+                                                    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 (sineApplication)

sine/Source/MainComponent.cpp

@@ -0,0 +1,86 @@
+#include "../JuceLibraryCode/JuceHeader.h"
+
+class MainContentComponent : public AudioAppComponent,
+                             public Slider::Listener {
+public:
+    MainContentComponent() : samplerate(0.0),
+                             angle(0.0),
+                             delta(0.0),
+                             current(500.0),
+                             target(current) {
+        addAndMakeVisible(freqslider);
+        freqslider.setRange(50.0, 5000.0);
+        freqslider.setSkewFactorFromMidPoint(500.0);
+        freqslider.setValue(current, dontSendNotification);
+        freqslider.addListener(this);
+        
+        setSize(800, 600);
+
+        setAudioChannels(0, 1);
+    }
+
+    ~MainContentComponent() {
+        shutdownAudio();
+    }
+
+    void prepareToPlay (int, double sampleRate) override {
+        samplerate = sampleRate;
+        updateDelta();
+    }
+    
+    void getNextAudioBlock(const AudioSourceChannelInfo& buf) override {
+        const float level = 0.125f;
+        float* const buffer = buf.buffer->getWritePointer(0, buf.startSample);
+        const double lt = target;
+        
+        if (lt != current) {
+            const double i = (lt - current) / buf.numSamples;
+            
+            for (int s = 0; s < buf.numSamples; ++s) {
+                const float c = (float) std::sin (angle);
+                current += i;
+                updateDelta();
+                angle += delta;
+                buffer[s] = c * level;
+            }
+            
+            current = lt;
+        } else {
+            for (int s = 0; s < buf.numSamples; ++s) {
+                const float c = (float) std::sin (angle);
+                angle += delta;
+                buffer[s] = c* level;
+            }
+        }
+    }
+    
+    void updateDelta() {
+        const double c = freqslider.getValue() / samplerate;
+        delta = c * 2.0 * double_Pi;
+    }
+                                 
+    void sliderValueChanged(Slider* s) override {
+        if (s == &freqslider) target = freqslider.getValue();
+    }
+
+    void releaseResources() override {}
+
+    void paint (Graphics& g) override {
+        g.fillAll (getLookAndFeel().findColour(ResizableWindow::backgroundColourId));
+    }
+
+    void resized() override{
+        freqslider.setBounds(10, 10, getWidth() - 10, 20);
+    }
+
+
+private:
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
+    
+    double samplerate, angle, delta;
+    double current, target;
+    
+    Slider freqslider;
+};
+
+Component* createMainContentComponent() { return new MainContentComponent(); }