package jp.sourceforge.qrcode.example.jmf;   import javax.media.*;   public class camStateHelper implements javax.media.ControllerListener {              Player player = null;       boolean configured = false;       boolean realized = false;       boolean prefetched = false;       boolean eom = false;       boolean failed = false;       boolean closed = false;              public camStateHelper(Player p) {           player = p;           p.addControllerListener(this);       }              public boolean configure(int timeOutMillis) {                      long startTime = System.currentTimeMillis();           synchronized (this) {               if (player instanceof Processor)                   ((Processor)player).configure();               else                   return false;               while (!configured && !failed) {                   try {                       wait(timeOutMillis);                   } catch (InterruptedException ie) {                   }                   if (System.currentTimeMillis() - startTime > timeOutMillis)                       break;               }           }           return configured;       }              public boolean realize(int timeOutMillis) {           long startTime = System.currentTimeMillis();           synchronized (this) {               player.realize();               while (!realized && !failed) {                   try {                       wait(timeOutMillis);                   }catch (InterruptedException ie) {                   }                   if (System.currentTimeMillis() - startTime > timeOutMillis)                       break;               }           }           return realized;       }              public boolean prefetch(int timeOutMillis) {           long startTime = System.currentTimeMillis();           synchronized (this) {               player.prefetch();               while (!prefetched && !failed) {                   try {                       wait(timeOutMillis);                   }catch (InterruptedException ie) {                   }                   if (System.currentTimeMillis() - startTime > timeOutMillis)                       break;               }           }           return prefetched && !failed;       }       public boolean playToEndOfMedia(int timeOutMillis) {           long startTime = System.currentTimeMillis();           eom = false;           synchronized (this) {               player.start();               while (!eom && !failed) {                   try {                       wait(timeOutMillis);                   }catch (InterruptedException ie) {                   }                   if (System.currentTimeMillis() - startTime > timeOutMillis)                       break;               }           }           return eom && !failed;       }              public void close() {           synchronized (this) {               player.close();               while (!closed) {                   try {                       wait(100);                   } catch (InterruptedException ie) {                   }               }           }           player.removeControllerListener(this);       }              public synchronized void controllerUpdate(ControllerEvent ce) {           if (ce instanceof RealizeCompleteEvent) {               realized = true;           }else if (ce instanceof ConfigureCompleteEvent) {               configured = true;           } else if (ce instanceof PrefetchCompleteEvent) {               prefetched = true;           } else if (ce instanceof EndOfMediaEvent) {               eom = true;           } else if (ce instanceof ControllerErrorEvent) {               failed = true;           } else if (ce instanceof ControllerClosedEvent) {               closed = true;           } else {               return;           }           notifyAll();       }   }