import paulscode.sound.ICodec; //导入依赖的package包/类
private static void registerCodec(Class<? extends ICodec> cls, String ext, String... mimeTypes) {
    try {
        SoundSystemConfig.setCodec(ext, cls);
        for (String type : mimeTypes)
            NotEnoughCodecs.KNOWN_MIME_TYPES.put(type, ext);
    } catch (Throwable t) {
        Log.warn(t, "Can't register codec %s for extension %s", cls.getName(), ext);
    }
}
 

import paulscode.sound.ICodec; //导入依赖的package包/类
/**
* Pre-loads a sound into memory.
* @param filenameURL Filename/URL of a sound file to load.
* @return True if the sound loaded properly.
*/
   @Override
   public boolean loadSound( FilenameURL filenameURL )
   {
       // Make sure the buffer map exists:
       if( bufferMap == null )
       {
           bufferMap = new HashMap<String, SoundBuffer>();
           importantMessage( "Buffer Map was null in method 'loadSound'" );
       }
       
       // make sure they gave us a filename:
       if( errorCheck( filenameURL == null,
                         "Filename/URL not specified in method 'loadSound'" ) )
           return false;
       
       // check if it is already loaded:        
       if( bufferMap.get( filenameURL.getFilename() ) != null )
           return true;
       
       ICodec codec = SoundSystemConfig.getCodec( filenameURL.getFilename() );
       if( errorCheck( codec == null, "No codec found for file '" +
                                      filenameURL.getFilename() +
                                      "' in method 'loadSound'" ) )
           return false;
       URL url = filenameURL.getURL();

       if( errorCheck( url == null, "Unable to open file '" +
                                    filenameURL.getFilename() +
                                    "' in method 'loadSound'" ) )
           return false;

       codec.initialize( url );
       SoundBuffer buffer = codec.readAll();
       codec.cleanup();
       codec = null;
       if( buffer != null )
           bufferMap.put( filenameURL.getFilename(), buffer );
       else
           errorMessage( "Sound buffer null in method 'loadSound'" );
       
       return true;
   }