get Audio Mixer Hierarchy Info - Java javax.sound.sampled

Java examples for javax.sound.sampled:Audio

  1. HOME
  2. Java
  3. javax.sound.sampled
  4. Audio

Description

get Audio Mixer Hierarchy Info

Demo Code

/*/*www  .  j  a v a 2s  .c o m*/
 * Copyright 2011 Witoslaw Koczewsi <wi@koczewski.de>
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero
 * General Public License as published by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public
 * License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program. If not,
 * see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.util.ArrayList;
import java.util.List;
import javax.sound.sampled.AudioSystem;

import javax.sound.sampled.CompoundControl;
import javax.sound.sampled.Control;

import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.Mixer.Info;

public class Main {
    public static void main(String[] argv) throws Exception {
        System.out.println(getHierarchyInfo());
    }

    public static String getHierarchyInfo() {
        StringBuilder sb = new StringBuilder();
        for (Mixer mixer : getMixers()) {
            sb.append("Mixer: ").append(toString(mixer)).append("\n");

            for (Line line : getAvailableOutputLines(mixer)) {
                sb.append("  OUT: ").append(toString(line)).append("\n");
                boolean opened = open(line);
                for (Control control : line.getControls()) {
                    sb.append("    Control: ").append(toString(control))
                            .append("\n");
                    if (control instanceof CompoundControl) {
                        CompoundControl compoundControl = (CompoundControl) control;
                        for (Control subControl : compoundControl
                                .getMemberControls()) {
                            sb.append("      Sub-Control: ")
                                    .append(toString(subControl))
                                    .append("\n");
                        }
                    }
                }
                if (opened)
                    line.close();
            }

            for (Line line : getAvailableOutputLines(mixer)) {
                sb.append("  IN: ").append(toString(line)).append("\n");
                boolean opened = open(line);
                for (Control control : line.getControls()) {
                    sb.append("    Control: ").append(toString(control))
                            .append("\n");
                    if (control instanceof CompoundControl) {
                        CompoundControl compoundControl = (CompoundControl) control;
                        for (Control subControl : compoundControl
                                .getMemberControls()) {
                            sb.append("      Sub-Control: ")
                                    .append(toString(subControl))
                                    .append("\n");
                        }
                    }
                }
                if (opened)
                    line.close();
            }

            sb.append("\n");
        }
        return sb.toString();
    }

    public static List<Mixer> getMixers() {
        Info[] infos = AudioSystem.getMixerInfo();
        List<Mixer> mixers = new ArrayList<Mixer>(infos.length);
        for (Info info : infos) {
            Mixer mixer = AudioSystem.getMixer(info);
            mixers.add(mixer);
        }
        return mixers;
    }

    public static String toString(Control control) {
        if (control == null)
            return null;
        return control.toString() + " (" + control.getType().toString()
                + ")";
    }

    public static String toString(Line line) {
        if (line == null)
            return null;
        Line.Info info = line.getLineInfo();
        return info.toString();// + " (" + line.getClass().getSimpleName() + ")";
    }

    public static String toString(Mixer mixer) {
        if (mixer == null)
            return null;
        StringBuilder sb = new StringBuilder();
        Info info = mixer.getMixerInfo();
        sb.append(info.getName());
        sb.append(" (").append(info.getDescription()).append(")");
        sb.append(mixer.isOpen() ? " [open]" : " [closed]");
        return sb.toString();
    }

    public static List<Line> getAvailableOutputLines(Mixer mixer) {
        return getAvailableLines(mixer, mixer.getTargetLineInfo());
    }

    public static boolean open(Line line) {
        if (line.isOpen())
            return false;
        try {
            line.open();
        } catch (LineUnavailableException ex) {
            return false;
        }
        return true;
    }

    private static List<Line> getAvailableLines(Mixer mixer,
            Line.Info[] lineInfos) {
        List<Line> lines = new ArrayList<Line>(lineInfos.length);
        for (Line.Info lineInfo : lineInfos) {
            Line line;
            line = getLineIfAvailable(mixer, lineInfo);
            if (line != null)
                lines.add(line);
        }
        return lines;
    }

    public static Line getLineIfAvailable(Mixer mixer, Line.Info lineInfo) {
        try {
            return mixer.getLine(lineInfo);
        } catch (LineUnavailableException ex) {
            return null;
        }
    }
}

Related Tutorials