test/jdk/javax/sound/sampled/DirectAudio/TickAtEndOfPlay.java

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import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;

/**
 * @test
 * @bug 5001959
 * @summary Short tick sound after finished playing with SourceDataLine
 * @run main/manual TickAtEndOfPlay
 */
public class TickAtEndOfPlay {

    static boolean WorkAround1 = false;
    static boolean WorkAround2 = false;

    public static void main(String[] args) throws Exception {
        System.out.println("This test should only be run on Windows.");
        System.out.println("Make sure that the speakers are connected and the volume is up.");
        System.out.println("Close all other programs that may use the soundcard.");

        System.out.println("You'll hear a 2-second tone. when the tone finishes,");
        System.out.println("  there should be no noise. If you hear a short tick/noise,");
        System.out.println("  the bug still applies.");

        System.out.println("Press ENTER to continue.");
        System.in.read();

        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("1")) WorkAround1 = true;
            if (args[i].equals("2")) WorkAround2 = true;
        }
        if (WorkAround1) System.out.println("Using work around1: appending silence");
        if (WorkAround2) System.out.println("Using work around2: waiting before close");

        int zerolen = 0; // how many 0-bytes will be appended to playback
        if (WorkAround1) zerolen = 1000;
        int seconds = 2;
        int sampleRate = 8000;
        double frequency = 1000.0;
        double RAD = 2.0 * Math.PI;
        AudioFormat af = new AudioFormat((float)sampleRate,8,1,true,true);
        System.out.println("Format: "+af);
        DataLine.Info info = new DataLine.Info(SourceDataLine.class,af);
        SourceDataLine source = (SourceDataLine)AudioSystem.getLine(info);
        System.out.println("Line: "+source);
        if (source.toString().indexOf("MixerSourceLine")>=0) {
            System.out.println("This test only applies to non-Java Sound Audio Engine!");
            return;
        }
        System.out.println("Opening...");
        source.open(af);
        System.out.println("Starting...");
        source.start();
        int datalen = sampleRate * seconds;
        byte[] buf = new byte[datalen+zerolen];
        for (int i=0; i<datalen; i++) {
            buf[i] = (byte)(Math.sin(RAD*frequency/sampleRate*i)*127.0);
        }
        System.out.println("Writing...");
        source.write(buf,0,buf.length);
        System.out.println("Draining...");
        source.drain();
        System.out.println("Stopping...");
        source.stop();
        if (WorkAround2) {
            System.out.println("Waiting 200 millis...");
            Thread.sleep(200);
        }
        System.out.println("Closing...");
        source.close();
        System.out.println("Done.");
    }
}