?? camstatehelper.java
字號:
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(); } }
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