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【实例简介】
   
我停止这个项目有三个原因:
   
1. 我必须将精力集中在我的主要项目上。这个项目只是一个有趣的副业。
   
2. 我不愿意为非个人用途滥用受版权保护的材料，你也不应该。
   
这次参赛的比赛已经结束了。
   
我发布了这个项目的源代码，因为我收到了大量的诚恳建议
   
但是我发现自己没有时间去执行这些建议。
   
该代码(/src/)已经发布到公共域，因此你可以随心所欲地使用它。
   
关于艺术资源
   
(/res/)仍然受任天堂的版权保护。因此，我可以确信我们不能对其进行任何使用，建议你直接向任天堂咨询。
   
此外，如果你想开发一个更大的项目，请考虑使用法律允许的艺术代替传统的艺术创作。
   
【核心代码】
   
public class SonarSoundEngine implements Runnable{
   
    
    
   
    private SonarSample silentSample;
   
    private SourceDataLine sdl;
   
    private int rate = 44100;
   
    private ListenerMixer listenerMixer;
   
    private int bufferSize = rate / 100; // 10 ms
   
    private ByteBuffer soundBuffer = ByteBuffer.allocate(bufferSize * 4);
   
    private float[] leftBuf, rightBuf;
   
    private float amplitude = 1;
   
    private float targetAmplitude = 1;
   
    private boolean alive = true;
   
   
protected SonarSoundEngine(){} public SonarSoundEngine(int maxChannels) throws LineUnavailableException{
   
    silentSample = new SonarSample(new float[] {0}, 44100);
   
    Mixer mixer = AudioSystem.getMixer(null);
   
    sdl = (SourceDataLine) mixer.getLine(new Line.Info(SourceDataLine.class));
   
    sdl.open(new AudioFormat(rate, 16, 2, true, false), bufferSize * 2 * 2 * 2 * 2 * 2);
   
    soundBuffer.order(ByteOrder.LITTLE_ENDIAN);
   
    sdl.start();
   
try{
   
   
   
   
   
    
    
    System.out.println("Failed to set the sound volume");
    
}
    
    
    
listenerMixer = new ListenerMixer(maxChannels);
    
    
leftBuf = new float[bufferSize];
    
    
rightBuf = new float[bufferSize];
    
    
Thread thread = new Thread(this);
    
    
thread.setDaemon(true);
    
    
thread.setPriority(10);
    
    
thread.start();}
    
    
public void setListener(SoundListener soundListener){
    
    
    listenerMixer.setSoundListener(soundListener);
    
}
    
    
    
public void shutDown(){
    
    
    alive = false;
    
}
    
    
    
public SonarSample loadSample(String resourceName){
    
    
    try{
    
    
        return SampleLoader.loadSample(resourceName);
    
    
    } catch (Exception e){
    
    
        System.out.println("Failed to load sample " + resourceName + ". Using silent sample");
    
    
        e.printStackTrace();
    
    
        return silentSample;
    
}
    
    
    
public void play(SonarSample sample, SoundSource soundSource, float volume, float priority, float rate){
    
    
    synchronized (listenerMixer) {
    
    
        listenerMixer.addSoundProducer(new SamplePlayer((SonarSample) sample, rate), soundSource, volume, priority);
    
}
    
    
    
public void clientTick(float alpha){
    
    
    synchronized (listenerMixer) {
    
    
        listenerMixer.update(alpha);
    
}
    
    
    
public void tick(){
    
    
    soundBuffer.clear();
    
    
    //        targetAmplitude = (targetAmplitude - 1) * 0.9f   1;
    
    
    //        targetAmplitude = (targetAmplitude - 1) * 0.9f   1;
    
    
    synchronized (listenerMixer) {
    
    
        float maxAmplitude = listenerMixer.read(leftBuf, rightBuf, rate);
    
    
        //            if (maxAmplitude > targetAmplitude) targetAmplitude = maxAmplitude;
    
}
    
    
    
    soundBuffer.clear();
    
    
    float gain = 32000;
    
    
    for (int i = 0; i < bufferSize; i ) {
    
    
        //            amplitude  = (targetAmplitude - amplitude) / rate;
    
    
        //          amplitude = 1;
    
    
        //              float gain = 30000;
    
    
        int l = (int) (leftBuf[i] * gain);
    
    
        int r = (int) (rightBuf[i] * gain);
    
    
        if (l > 32767) l = 32767;
    
    
        if (r > 32767) r = 32767;
    
    
        if (l < -32767) l = -32767;
    
    
        if (r < -32767) r = -32767;
    
    
        soundBuffer.putShort((short)l);
    
    
        soundBuffer.putShort((short)r);
    
    
    
    
    sdl.write(soundBuffer.array(), 0, bufferSize * 2 * 2);
    
    
   

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