Audio devices as seen by javax.sound

AudioSystemInfo.java

import javax.sound.sampled.*;
import java.util.Arrays;

public class AudioSystemInfo {

    public static void main(String[] args) {

        System.out.println("Audio devices as seen by javax.sound:");
        // simpleMixerInfo();

        dumpMixers();
    }


    private static void dumpLineInfo(String indent, Line.Info[] lineInfo) {
        int numDumped = 0;

        if (lineInfo != null) {
            for (Line.Info info : lineInfo) {
                if (info instanceof DataLine.Info) {
                    System.out.println(indent + "Line: " + info.toString());
                    AudioFormat[] formats = ((DataLine.Info) info).getFormats();
                    for (AudioFormat format : formats) {
                        System.out.println(indent + "\tFormat: " + format);
                    }
                    numDumped++;
                } else if (info instanceof Port.Info) {
                    System.out.println(indent + "Port: " + info);
                    numDumped++;
                } else {
                    System.out.println(indent + "Other: " + info.toString());
                }
            }
        }

        if (numDumped == 0) {
            System.out.println(indent + "none");
        }
    }

    private static void dumpMixers() {

        Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();

        for (int i = 0; i < mixerInfo.length; i++) {
            Mixer mixer = AudioSystem.getMixer(mixerInfo[i]);
            System.out.println("\nMixer[" + i + "]:\t\""
                    + mixerInfo[i].getName() + '\"');
            System.out.println("    Description:\t"
                    + mixerInfo[i].getDescription());

            System.out.println("    SourceLineInfo (e.g. speakers):");
            dumpLineInfo("        ", mixer.getSourceLineInfo());

            System.out.println("    TargetLineInfo (e.g. microphones):");
            dumpLineInfo("        ", mixer.getTargetLineInfo());
        }
    }


    private static void simpleMixerInfo() {
        for (Mixer.Info mixer : AudioSystem.getMixerInfo()) {
            System.out.println(String.format("\nMixer:\t %s \tDescription: %s",
                    mixer.getName(),
                    mixer.getDescription()
            ));
            Mixer m = AudioSystem.getMixer(mixer);
            System.out.println("   Source lines: " + Arrays.asList(m.getSourceLineInfo()));
            System.out.println("   Target lines: " + Arrays.asList(m.getTargetLineInfo()));
        }
    }

}