SeeGoogleWave.java

package com.jsyn.examples;

import java.awt.BorderLayout;
import java.awt.GridLayout;

import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.JPanel;

import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.scope.AudioScope;
import com.jsyn.swing.JAppletFrame;
import com.jsyn.swing.PortControllerFactory;
import com.jsyn.unitgen.LineOut;

/**
 * Generate the waveform shown on the Google home page on 2/22/12.
 * 
 * @author Phil Burk (C) 2010 Mobileer Inc
 * 
 */
public class SeeGoogleWave extends JApplet
{
	private static final long serialVersionUID = -831590388347137926L;
	private Synthesizer synth;
	private GoogleWaveOscillator googleWaveUnit;
	private LineOut lineOut;
	private AudioScope scope;

	/* Can be run as either an application or as an applet. */
	public static void main( String args[] )
	{
		SeeGoogleWave applet = new SeeGoogleWave();
		JAppletFrame frame = new JAppletFrame( "Google Wave", applet );
		frame.setSize( 640, 500 );
		frame.setVisible( true );
		frame.test();
		frame.validate();
	}

	private void setupGUI()
	{
		setLayout( new BorderLayout() );

		add( BorderLayout.NORTH, new JLabel(
				"GoogleWave - elliptical segments" ) );

		scope = new AudioScope( synth );
		scope.addProbe( googleWaveUnit.output );
		scope.setTriggerMode( AudioScope.TriggerMode.NORMAL );
		scope.getView().setShowControls( false );
		scope.start();
		add( BorderLayout.CENTER, scope.getView() );

		JPanel southPanel = new JPanel();
		southPanel.setLayout( new GridLayout( 0, 1 ) );
		add( BorderLayout.SOUTH, southPanel );

		southPanel.add( PortControllerFactory
				.createExponentialPortSlider( googleWaveUnit.frequency ) );
		southPanel.add( PortControllerFactory
				.createExponentialPortSlider( googleWaveUnit.variance ) );
		southPanel.add( PortControllerFactory
				.createExponentialPortSlider( googleWaveUnit.amplitude ) );

		validate();
	}

	public void start()
	{
		synth = JSyn.createSynthesizer();
		synth.add( googleWaveUnit = new GoogleWaveOscillator() );
		googleWaveUnit.amplitude.setup( 0.02, 0.5, 1.0 );
		googleWaveUnit.variance.setup( 0.0, 0.0, 1.0 );
		googleWaveUnit.frequency.setup( 40.0, 200.0, 1000.0 );

		// Add an output so we can hear it.
		synth.add( lineOut = new LineOut() );

		googleWaveUnit.output.connect( 0, lineOut.input, 0 );
		googleWaveUnit.output.connect( 0, lineOut.input, 1 );

		setupGUI();

		// Start synthesizer using default stereo output at 44100 Hz.
		synth.start();
		// Start lineOut so it can pull data from other units.
		lineOut.start();

		// We only need to start the LineOut. It will pull data from the
		// oscillator.
		lineOut.start();

	}

	public void stop()
	{
		scope.stop();
		synth.stop();
	}

}