OpenAL Sound在Java中无法正常播放

Question

我编写使用OpenAL并运行的程序。但是，声音不能正常播放。

声音以惊人的速度播放。此外，如果您改变声音的音高，声音会变得嘈杂。 那是什么？

代码。我查阅了较低URL中存在的源代码。

http://wiki.lwjgl.org/wiki/OpenAL_Tutorial_1_-_Single_Static_Source

package Other;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;

import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException; 
import org.lwjgl.openal.AL;
import org.lwjgl.openal.AL10;
import org.lwjgl.openal.AL11;
import org.lwjgl.util.WaveData;

public class Music {
/** Position of the source sound. */
FloatBuffer sourcePos;

/** Velocity of the source sound. */
FloatBuffer sourceVel;

/** Position of the listener. */
FloatBuffer listenerPos;

/** Velocity of the listener. */
FloatBuffer listenerVel;

/** Orientation of the listener. (first 3 elements are "at", second 3 are "up") */
FloatBuffer listenerOri;

/** Buffers hold sound data. */
IntBuffer buffer;

/** Sources are points emitting sound. */
IntBuffer source;

public Music()
{
  /** Buffers hold sound data. */
  buffer = BufferUtils.createIntBuffer(1);

  /** Sources are points emitting sound. */
  source = BufferUtils.createIntBuffer(1);

  /** Position of the source sound. */
  sourcePos = BufferUtils.createFloatBuffer(3).put(new float[] { 0.0f, 0.0f, 0.0f});

  /** Velocity of the source sound. */
  sourceVel = BufferUtils.createFloatBuffer(3).put(new float[] {0.0f, 0.0f, 0.0f });

  /** Position of the listener. */
  listenerPos = BufferUtils.createFloatBuffer(3).put(new float[] {0.0f, 0.0f, 0.0f });

  /** Velocity of the listener. */
  listenerVel = BufferUtils.createFloatBuffer(3).put(new float[] {0.0f, 0.0f, 0.0f });

  /** Orientation of the listener. (first 3 elements are "at", second 3 are "up") */
  listenerOri = BufferUtils.createFloatBuffer(6).put(new float[] { 0.0f, 0.0f, -1.0f,  0.0f, 1.0f, 0.0f }); 
}
int loadALData() 
{
    sourcePos.rewind(); 
    sourceVel.rewind();

    // Load wav data into a buffer.
    AL10.alGenBuffers(buffer);

    if(AL10.alGetError() != AL10.AL_NO_ERROR)
    {
      return AL10.AL_FALSE;
    }

    WaveData waveFile;
    try {
        //FileInputStream fin=new FileInputStream("18am01.wav");
        FileInputStream fin=new FileInputStream("awaken.wav");
        BufferedInputStream bin = new BufferedInputStream(fin);
        waveFile = WaveData.create(bin);
        AL10.alBufferData(buffer.get(0), waveFile.format, waveFile.data, waveFile.samplerate);
        waveFile.dispose();
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    // Bind the buffer with the source.
    AL10.alGenSources(source);

    if (AL10.alGetError() != AL10.AL_NO_ERROR)
    {
      return AL10.AL_FALSE;
    }

    AL11.alSource(source.get(0), AL10.AL_BUFFER,   buffer);
    AL10.alSourcef(source.get(0), AL10.AL_PITCH,    1.0f        );
    AL10.alSourcef(source.get(0), AL10.AL_GAIN,     1.0f        );
    AL10.alSource (source.get(0), AL10.AL_POSITION, sourcePos   );
    AL10.alSource (source.get(0), AL10.AL_VELOCITY, sourceVel   );
    //AL10.alSourcef(source.get(0), AL11.AL_SPEED_OF_SOUND,100.5f);
    // Do another error check and return.
    if (AL10.alGetError() == AL10.AL_NO_ERROR)
    {
      return AL10.AL_TRUE;
    } 
    return AL10.AL_FALSE;
}
/**
 * void setListenerValues()
 *
 *  We already defined certain values for the Listener, but we need
 *  to tell OpenAL to use that data. This function does just that.
 */
void setListenerValues() {

  listenerPos.rewind();
  listenerVel.rewind();
  listenerOri.rewind();

  AL10.alListener(AL10.AL_POSITION,    listenerPos);
  AL10.alListener(AL10.AL_VELOCITY,    listenerVel);
  AL10.alListener(AL10.AL_ORIENTATION, listenerOri);
}

/**
 * void killALData()
 *
 *  We have allocated memory for our buffers and sources which needs
 *  to be returned to the system. This function frees that memory.
 */
void killALData() {
  AL10.alDeleteSources(source);
  AL10.alDeleteBuffers(buffer);
}

public void execute() {
      // Initialize OpenAL and clear the error bit.
      try{
        AL.create();
      } catch (LWJGLException le) {
        le.printStackTrace();
        return;
      }
      AL10.alGetError();

      // Load the wav data.
      if(loadALData() == AL10.AL_FALSE) {
        System.out.println("Error loading data.");
        return;
      }  
      setListenerValues();
      // Loop.
      char c = ' ';
      while(c != 'q') {
        try {
         c = (char) System.in.read();
        } catch (IOException ioe) {
          c = 'q';
      }
      switch(c) {
        // Pressing 'p' will begin playing the sample.
        case 'p': 
            AL10.alSourcePlay(source.get(0));
            break;
    // Pressing 's' will stop the sample from playing.
        case's': AL10.alSourceStop(source.get(0)); break;

        // Pressing 'h' will pause the sample.
        case 'h': AL10.alSourcePause(source.get(0)); break;
      };
      }
    killALData();
 }
public static void main(String[] args) {
    Music music= new Music();
    music.execute();
}

}