simplesounds.java

JAVA编程百例书中各章节的所有例子的源代码,包括套接字编程

package ch06.section09;

import java.applet.Applet;
import java.net.URL;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
import java.io.File;
import java.security.*;
import javax.media.j3d.*;
import javax.vecmath.*;

/*
 * This Java3D program:
 *    Creates an instance of the JavaSoundMixer AudioDevice, initializing it
 *         and attaching it to the PhysicalEnvironment by using
 *         SimpleUniverse.
 *    Creates one uncached Background and two cached Point sound sources.
 *    Creates and executes a custom behavior (SimpleSoundsBehavior) that
 *         starts the sound playing and transforms the PointSound source
 *         by modifying the TransformGroup that contains the Sound nodes.
 *
 * Usage:
 *    java SimpleSounds [URLpath [name1 [name2 [name2]]]]
 *
 * The first optional command line parameter is the URL path to directory
 *       containing "file:" or "http:" and then directory path string.
 *    If you are using the suppled default sound files in the same directory
 *       as this test program then only the URLpath need be supplied on the
 *       command line.
 *    If this parameter is not included then the current path to the directory
 *       this program is running in is used for an application
 *       and the codebase is used for an applet.
 * The second thru fourth optional command line parameters are sound file names
 *    If not given, the default file names are:
 *       techno_machine.au
 *       hello_universe.au
 *       roar.au
 *    that correspond to the 3 'voice' quality, 8-bit, u-law, 8-kHz samples
 *    included in the same directory as this test program.
 *
 *    Java Sound engine has been advertised to support the following 8- and 16-
 *    bit, linear and u-law, mono and stereo sound sample file formats: AU,
 *    AIFF, WAV, and PCM.  Non-cached MIDI and RMF files are also supported.
 *    Neither compressed formats (DVI, GSM, MOD) nor A-law formated files are
 *    supported at this time.
 */

public class SimpleSounds
    extends Applet {

  // File name of sound sample
  private static int filenamesGiven = 0;
  private static URL[] url = new URL[3];
  private static String[] filename = new String[3];
  private static String path = "file:";
  private static boolean filenamesSet = false;

  private SimpleUniverse u = null;

  public BranchGroup createSceneGraph() {
    // 创建根节点
    BranchGroup objRoot = new BranchGroup();

    // 创建一个场景节点，设置Capability属性使参数可以在运行期被改变。
    //并将此节点添加到根节点上。
    TransformGroup objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objRoot.addChild(objTrans);

    //创建一个简单物体并将此添加到场景节点.
    objTrans.addChild(new ColorCube(0.4));

    // 建立一个转换节点，并添加行为对象，并添加到场景中
    Transform3D yAxis = new Transform3D();
    Alpha rotation = new Alpha( -1, Alpha.INCREASING_ENABLE,
                               0, 0,
                               20000, 0, 0,
                               0, 0, 0);
    RotationInterpolator rotator =
        new RotationInterpolator(rotation,
                                 objTrans, yAxis,
                                 0.0f, (float) Math.PI * 2.0f);
    BoundingSphere bounds =
        new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
    rotator.setSchedulingBounds(bounds);
    objTrans.addChild(rotator);
    /*
     *建立声音节点并添加到场景中
     */
    BackgroundSound sound1 = new BackgroundSound();
    PointSound sound2 = new PointSound();
    PointSound sound3 = new PointSound();
    sound1.setCapability(PointSound.ALLOW_ENABLE_WRITE);
    sound1.setCapability(PointSound.ALLOW_INITIAL_GAIN_WRITE);
    sound1.setCapability(PointSound.ALLOW_SOUND_DATA_WRITE);
    sound1.setCapability(PointSound.ALLOW_SCHEDULING_BOUNDS_WRITE);
    sound1.setCapability(PointSound.ALLOW_CONT_PLAY_WRITE);
    sound1.setCapability(PointSound.ALLOW_RELEASE_WRITE);
    sound1.setCapability(PointSound.ALLOW_DURATION_READ);
    sound1.setCapability(PointSound.ALLOW_IS_PLAYING_READ);
    sound1.setCapability(PointSound.ALLOW_LOOP_WRITE);
    sound2.setCapability(PointSound.ALLOW_ENABLE_WRITE);
    sound2.setCapability(PointSound.ALLOW_INITIAL_GAIN_WRITE);
    sound2.setCapability(PointSound.ALLOW_SOUND_DATA_WRITE);
    sound2.setCapability(PointSound.ALLOW_SCHEDULING_BOUNDS_WRITE);
    sound2.setCapability(PointSound.ALLOW_CONT_PLAY_WRITE);
    sound2.setCapability(PointSound.ALLOW_RELEASE_WRITE);
    sound2.setCapability(PointSound.ALLOW_DURATION_READ);
    sound2.setCapability(PointSound.ALLOW_IS_PLAYING_READ);
    sound2.setCapability(PointSound.ALLOW_POSITION_WRITE);
    sound2.setCapability(PointSound.ALLOW_LOOP_WRITE);
    sound3.setCapability(PointSound.ALLOW_ENABLE_WRITE);
    sound3.setCapability(PointSound.ALLOW_INITIAL_GAIN_WRITE);
    sound3.setCapability(PointSound.ALLOW_SOUND_DATA_WRITE);
    sound3.setCapability(PointSound.ALLOW_SCHEDULING_BOUNDS_WRITE);
    sound3.setCapability(PointSound.ALLOW_CONT_PLAY_WRITE);
    sound3.setCapability(PointSound.ALLOW_RELEASE_WRITE);
    sound3.setCapability(PointSound.ALLOW_DURATION_READ);
    sound3.setCapability(PointSound.ALLOW_IS_PLAYING_READ);
    sound3.setCapability(PointSound.ALLOW_POSITION_WRITE);

    BoundingSphere soundBounds =
        new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
    sound1.setSchedulingBounds(soundBounds);
    sound2.setSchedulingBounds(soundBounds);
    sound3.setSchedulingBounds(soundBounds);
    objTrans.addChild(sound1);
    objTrans.addChild(sound2);
    objTrans.addChild(sound3);

    /*
     * 创建用于播放声音的 Behavior对象
     */
    SimpleSoundsBehavior player = new SimpleSoundsBehavior(
        sound1, sound2, sound3,
        url[0], url[1], url[2], soundBounds);
    player.setSchedulingBounds(soundBounds);
    objTrans.addChild(player);

    objRoot.compile();

    return objRoot;
  }

  public SimpleSounds() {
  }

  public void init() {
    if (!filenamesSet) {

      int j;
      for (j = 0; j < filenamesGiven; j++) {
        filename[j] = new String(path + "/" + filename[j]);
      }
      for (int i = j; i < 3; i++) {
        if (i == 0) {
          filename[0] = new String(path + "c:/techno_machine.au");
        }
        if (i == 1) {
          filename[1] = new String(path + "c:/hello_universe.au");
        }
        if (i == 2) {
          filename[2] = new String(path + "c:/roar.au");
        }
      }
      filenamesSet = true;
    }

    setLayout(new BorderLayout());
    GraphicsConfiguration config =
        SimpleUniverse.getPreferredConfiguration();

    Canvas3D c = new Canvas3D(config);
    add("Center", c);

    for (int i = 0; i < 3; i++) {
      try {
        url[i] = new URL(filename[i]);
      }
      catch (Exception e) {
        System.out.println(e.getMessage());
        return;
      }
    }

    u = new SimpleUniverse(c);
    AudioDevice audioDev = u.getViewer().createAudioDevice();
    BranchGroup scene = createSceneGraph();

    u.getViewingPlatform().setNominalViewingTransform();

    u.addBranchGraph(scene);
  }

  public void destroy() {
    u.removeAllLocales();
  }

  public static void main(String[] args) {

    new MainFrame(new SimpleSounds(), 256, 256);
  }
}