MP3Viewer.java

/**********************************************************************************
 * 
 *  Compilation:  javac -cp .:stdplayer.jar MP3Viewer.java
 *  Execution:    java  -cp .:stdplayer.jar MP3Viewer audio
 *  Dependencies: Wave.java
 *
 *  Visualizes the audio file.
 *
 *  Note:  under Windows, replace the : with a ; when specifying the classpath.
 *  Note:  stdplayer.jar must be located in the current directory.
 *
 **********************************************************************************/
import javazoom.jl.player.StdPlayer;
import java.lang.Math;

public class MP3Viewer {
	public static void main(String[] args) {
		double yscale = 300;
		String filename = args[0];
                StdPlayer.open(filename);
		StdDraw.setCanvasSize(576, 512);
		StdDraw.enableDoubleBuffering();
		StdDraw.setPenColor(StdDraw.BLUE);
		StdDraw.setXscale(-30, 1182);
		StdDraw.setYscale(-yscale, yscale);
		int i = 1;
                while (!StdPlayer.isEmpty()) {
		    Wave w = new Wave(StdPlayer.getLeftChannel(), StdPlayer.getRightChannel());
				w.play();
				// Every other wave.
				if (i % 2 == 0) {
					w.draw(i / 2);
				}
				StdDraw.pause(10);
				i++;
		}
		StdPlayer.close();
		System.exit(0);
    }
}