io: added io project

io/Source/MainComponent.cpp

@@ -0,0 +1,70 @@
+#include "../JuceLibraryCode/JuceHeader.h"
+
+class MainContentComponent : public AudioAppComponent{
+public:
+    MainContentComponent() : random(Random()) {
+        
+        addAndMakeVisible(levelslider);
+        addAndMakeVisible(levellabel);
+        levelslider.setRange(0.0, 1.0);
+        levelslider.setValue(0.5);
+        levelslider.setTextBoxStyle(Slider::TextBoxRight, false, 100, 20);
+        levellabel.setText("Level", dontSendNotification);
+        
+        setSize(800, 600);
+        setAudioChannels(2, 2);
+    }
+
+    ~MainContentComponent() {
+        shutdownAudio();
+    }
+
+    void prepareToPlay(int, double) override {}
+
+    void getNextAudioBlock(const AudioSourceChannelInfo& buf) override {
+        AudioIODevice* device = deviceManager.getCurrentAudioDevice();
+        const BigInteger ic = device->getActiveInputChannels();
+        const BigInteger oc = device->getActiveOutputChannels();
+        
+        const int mic = ic.getHighestBit() + 1;
+        const int moc = oc.getHighestBit() + 1;
+        
+        const float l = (float) levelslider.getValue();
+        
+        for (int c = 0; c < moc; ++c) {
+            if (!oc[c] || !moc) buf.buffer->clear (c, buf.startSample, buf.numSamples);
+            else {
+                const int ac = c % mic;
+                    
+                if (!ic[c]) buf.buffer->clear(c, buf.startSample, buf.numSamples);
+                else {
+                    const float* ib = buf.buffer->getReadPointer(ac, buf.startSample);
+                    float* ob = buf.buffer->getWritePointer(c, buf.startSample);
+                        
+                    for (int s = 0; s < buf.numSamples; ++s) ob[s] = ib[s] * random.nextFloat() * l;
+                }
+            }
+        }
+    }
+
+    void releaseResources() override {}
+
+    void paint(Graphics& g) override {
+        g.fillAll(getLookAndFeel().findColour (ResizableWindow::backgroundColourId));
+    }
+
+    void resized() override {
+        levellabel.setBounds(10, 10, 90, 20);
+        levelslider.setBounds(100, 10, getWidth() - 110, 20);
+    }
+
+
+private:
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
+    Random random;
+    Slider levelslider;
+    Label levellabel;
+    
+};
+
+Component* createMainContentComponent() { return new MainContentComponent(); }