adjust sound Master Volume - Java javax.sound.sampled

Java examples for javax.sound.sampled:Control

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Description

adjust sound Master Volume

Demo Code

/*/*  w ww.j  a va 2s.  c  o m*/
 * Copyright 2013 Daniel Baumann
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
//package com.java2s;
import java.util.ArrayList;
import java.util.List;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.CompoundControl;
import javax.sound.sampled.Control;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;

public class Main {
    public static void main(String[] argv) throws Exception {
        float f = 2.45678f;
        adjustMasterVolume(f);
    }

    public static void adjustMasterVolume(float f) {
        Mixer.Info[] mixers = AudioSystem.getMixerInfo();
        for (Mixer.Info mixerInfo : mixers) {
            Mixer mixer = AudioSystem.getMixer(mixerInfo);
            Line.Info[] lineInfos = mixer.getTargetLineInfo();
            for (Line.Info lineInfo : lineInfos) {
                if (lineInfo.toString().toLowerCase().contains("pcm")) {
                    Line line = null;
                    boolean opened = true;
                    try {
                        line = mixer.getLine(lineInfo);
                        opened = line.isOpen() || line instanceof Clip;
                        if (!opened) {
                            line.open();
                        }

                        List<FloatControl> volumeControls = getVolumeControls(line);
                        for (FloatControl floatControl : volumeControls) {
                            float newVolume = floatControl.getValue() + f;
                            if (newVolume > 1.0) {
                                newVolume = 1.0F;
                            }
                            if (newVolume < 0.0) {
                                newVolume = 0.0F;
                            }
                            floatControl.setValue(newVolume);
                        }
                    } catch (LineUnavailableException e) {
                        e.printStackTrace();
                    } catch (IllegalArgumentException iaEx) {
                        System.out.println("    " + iaEx);
                    } finally {
                        if (line != null && !opened) {
                            line.close();
                        }
                    }
                }
            }
        }
    }

    public static List<FloatControl> getVolumeControls(Line line) {
        List<FloatControl> result = new ArrayList<FloatControl>();
        for (Control c : line.getControls()) {
            result.addAll(getVolumeControls(c));
        }
        return result;
    }

    private static List<FloatControl> getVolumeControls(Control control) {
        List<FloatControl> result = new ArrayList<FloatControl>();
        if (control instanceof CompoundControl) {
            Control[] controls = ((CompoundControl) control)
                    .getMemberControls();
            for (Control c : controls) {
                result.addAll(getVolumeControls(c));
            }
        } else if (control instanceof FloatControl) {
            FloatControl fc = (FloatControl) control;
            if (fc.getType() == FloatControl.Type.VOLUME) {
                result.add(fc);
            }
        }
        return result;
    }
}

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