Java Player类代码示例

import javax.media.Player; //导入依赖的package包/类
public JMFrame(Player player, String title) {
super(title, true, true, true, true);
getContentPane().setLayout( new BorderLayout() );
setSize(320, 10);
setLocation(50, 50);
setVisible(true);
mplayer = player;
mplayer.addControllerListener((ControllerListener) this);
mplayer.realize();
addInternalFrameListener( new InternalFrameAdapter() {
    public void internalFrameClosing(InternalFrameEvent ife) {
	mplayer.close();
    }
} );
	    
   }
 

import javax.media.Player; //导入依赖的package包/类
public static void main(String args[]) {
Player	player;
// This is little trick simply to keep
// the application running indefinitely.
JFrame f = new JFrame();

       if( args.length != 1 ) {
           System.err.println("Usage:");
           System.err.println("java ejmf.examples.basics.JMFAudioOnly <Media>");
           return;
       }

       String media = args[0];
try {
    URL url = new URL("file:///" +  new File(media).getCanonicalPath());
    player = Manager.createPlayer(url);

           player.start();
       }
catch (Exception e) {
    e.printStackTrace();
}
   }
 

import javax.media.Player; //导入依赖的package包/类
public static void main(String args[]) {
   	Player player;

// This is little trick simply to keep
// the application running indefinitely.
JFrame f = new JFrame();

       if( args.length != 1 ) {
           System.err.println("Usage:");
           System.err.println("java ejmf.examples.basics.JMFAudioLoop <Media>");
           return;
       }

       String media = args[0];

try {
    URL url = new URL("file:///" +  new File(media).getCanonicalPath());
    player = Manager.createPlayer(url);
    player.addControllerListener(new LoopListener());
           player.start();
       }
catch (Exception e) {
    e.printStackTrace();
}
   }
 

import javax.media.Player; //导入依赖的package包/类
public static void main(String args[]) {
   	JPanel	playerPanel;
       Player 	player;


       if( args.length != 1 ) {
           System.err.println("Usage:");
           System.err.println("java ejmf.examples.basics.JMFVideoToo <Media>");
           return;
       }

       String media = args[0];

JFrame f = new JFrame(media);

f.addWindowListener(new WindowAdapter() {
    public void windowClosing(WindowEvent event) {
 	System.exit(0);
    }
});

playerPanel = new JPanel();
playerPanel.setLayout(new BorderLayout());
f.getContentPane().add(playerPanel);
f.pack();
f.setVisible(true);

try {
    URL url = new URL("file:///" +  new File(media).getCanonicalPath());
    player = Manager.createPlayer(url);
    player.addControllerListener(new VideoTooListener(playerPanel));
    player.start();
       }
catch (Exception e) {
    e.printStackTrace();
}
   }
 

import javax.media.Player; //导入依赖的package包/类
public static void main(String args[]) {
       if( args.length == 0 ) {
           System.out.println("Specify at least one media URL/file");
 	    return;
       }
      
       Vector v = new Vector();

       //  Create a Vector of Players
       for(int i = 0; i < args.length; i++) {
           try {
               Player p = Manager.createPlayer(
                   Utility.appArgToMediaLocator(args[i]) );
               new StateWaiter(p).blockingRealize();
               v.addElement(p);
           } catch(Exception e) {
               System.out.println( "Could not create Player for " + args[i]);
	e.printStackTrace();
           }
       }

       //  Choose a Master
       players = new Player[ v.size() ];
       v.copyInto(players);
new XSync(players);
   }
 

import javax.media.Player; //导入依赖的package包/类
/**
*  A wrapper around StateWaiter's <tt>blockingPrefetch<tt>
       * that stops the Player if necessary before testing state.     
       * If Controller state is less than <tt>Prefetched</tt>, then
    	* Controller is moved to this state.
       * 
       * This method performs a slight optimization by checking whether
       * Controller is already in the <tt>Prefetched</tt> state.
* If so, return is immediate.
       *
       * @param player A javax.media.Player
  	@ @see ejmf.toolkit.util.StateWaiter
     	*/
   private boolean blockingPrefetch(Player player) {

int state = player.getState();
	if (state == Controller.Prefetched) {
    return true;
}

if (state == Controller.Started) {
    player.stop();
}

if (state < Controller.Prefetched) {
    StateWaiter sw = new StateWaiter(player);
           return sw.blockingPrefetch();
}
return true;
   }
 

import javax.media.Player; //导入依赖的package包/类
/** 
    * Create a MultiPlayer from an array of media file names.
* @param mediaFiles An array of media file names		
* @param mpc A MultiPlayerControl strategy. 
    */

   public MultiPlayer(String[] mediaFiles, MultiPlayerControl mpc) {
tracks = new TrackList(mediaFiles.length);
for (int i = 0; i < mediaFiles.length; i++) {
    try {
        String path = new File(mediaFiles[i]).getCanonicalPath();
        MediaLocator ml = Utility.appArgToMediaLocator(path);
        Player player = Manager.createPlayer(ml);
        tracks.addElement(new Track(i, ml, player));
    } catch (Exception e) {
	System.err.println(
	    "Unable to create Player from " + mediaFiles[i]);
	continue;
	    }
}
nActiveTracks = addAsListener(tracks);
setControlStrategy(mpc);
   }
 

import javax.media.Player; //导入依赖的package包/类
/** Display all Player ViewScreens
    * 
    */
    public void displayPlayers() {
if (viewingPanel == null)
    return;

       for (int i = 0; i < tracks.getNumberOfTracks(); i++) {
    Track track = tracks.getTrack(i);
    if (track.isAvailable())
	continue;
    Player player = track.getPlayer();
    String path = track.getMediaLocator().toString();
    viewingPanel.addScreen(new File(path).getName(), 
			player, 
			ViewingPanel.DISPLAY_BOTH);
}
    }
 

import javax.media.Player; //导入依赖的package包/类
/**
     * A debugging hook for dumping contents of each Track
     * to the file.dbg.out.
     */
   public void query() {
for (int i = 0; i < tracks.getNumberOfTracks(); i++) {
    Track track = tracks.getTrack(i);
    Player p = track.getPlayer();

    System.out.println("++++++++++++++++++++");

    if (track.isAvailable()) {
	System.out.println("Track " + i +  " not assigned");
 	continue;
           }
    System.out.println("player = " + track.getMediaLocator().toString());
           System.out.println("state = " + Utility.stateToString(p.getState()));
           System.out.println("media time = " + p.getMediaTime().getSeconds());
           System.out.println("stop time = " + p.getStopTime().getSeconds());
           System.out.println("duration = " + p.getDuration().getSeconds());
}
   }
 

import javax.media.Player; //导入依赖的package包/类
/** In response to TrackModelEvent, add a Player.
    *  initPlayer is called to bring Player to prefetched
    *  state. If a ViewingPanel exists, the Player screen
    *  is displayed. Newly added Player adopts TimeBase
    *  of current master Player.
    *
    *  @param tm TrackModel to which Player is being added.
    *  @param index which track is getting a new Player
    *  @see javax.media.TimeBase
    *  @see ejmf.toolkit.multiplayer.TrackModelAssignEvent 
    *  @see ejmf.toolkit.multiplayer.TrackModel
    *  @see ejmf.toolkit.gui.ViewingPanel
    *  @see ejmf.toolkit.gui.ViewScreen
    *   
    */
   private void installPlayer(TrackModel tm, int index)  {
Debug.printObject("enter installPlayer : " + index);
Track	track = tracks.getTrack(index);
Player 	player = track.getPlayer();

player.addControllerListener(this);
synchronized (this) {
    nActiveTracks++;
}
if (viewingPanel != null)
    viewingPanel.addScreen(track.getMediaLocator().toString(),
			player, 
			ViewingPanel.DISPLAY_BOTH);
Debug.printObject("exit installPlayer : " + index);
   }
 

import javax.media.Player; //导入依赖的package包/类
private void forceRealized(TrackList tracks) {
for (int i = 0; i < tracks.getNumberOfTracks(); i++) {
    Track track = tracks.getTrack(i);
    if (track.isAssigned()) {
        Player player = track.getPlayer();
        int state = player.getState();
        if (state == Controller.Started) {
	    player.stop();
	}

        if (state > Controller.Realized) {
	    player.deallocate();
	}
    }
}
    }
 

import javax.media.Player; //导入依赖的package包/类
/** 
* Create an NPlayerPanel from a MultiPlayer.
* In this case, Players are already constructed.
* Players are moved to prefetch state.
*/
   public NPlayerPanel(MultiPlayer mp) {
tracks = mp.getTrackList();
Vector	v 	= new Vector();
       for (int i = 0; i < tracks.getNumberOfTracks(); i++) {
    Track track = tracks.getTrack(i);
    if (track.isAssigned()) {
	v.addElement(track.getPlayer());
    }
       }

players = new Player[v.size()];
v.copyInto(players);

setLayout(createLayout(players.length));
for (int i = 0; i < players.length; i++) {
    StateWaiter waiter = new StateWaiter(players[i]);
    waiter.blockingRealize();
    displayPlayer(players[i], tracks.getTrack(i).getMediaLocator());
    waiter.blockingPrefetch();
}
   }
 

import javax.media.Player; //导入依赖的package包/类
private void createAndDisplayPlayers(MediaLocator[] mls) 
		throws NoPlayerException, IOException {
StateWaiter	waiter;

setLayout(createLayout(mls.length));

players = new Player[mls.length];
for (int i = 0; i < mls.length; i++) {
    players[i] = Manager.createPlayer(mls[i]);
    waiter = new StateWaiter(players[i]);
    waiter.blockingRealize();

    displayPlayer(players[i], mls[i]);

    waiter.blockingPrefetch();
}
   }
 

import javax.media.Player; //导入依赖的package包/类
private void timeDragged(int x) {
if (player == null)
    return;
// Determine the requested media time based on duration of the file
// and position of the mouse in the control panel.
long dura = player.getDuration().getNanoseconds();
if (dura < 0 || dura > 3 * 3600 * 1000000000L)
    return;
long nano = (long) ((float) (x - COMPONENTS[MEDIATIME][0]) /
		    (COMPONENTS[MEDIATIME][2] -
		     COMPONENTS[MEDIATIME][0] + 1) * dura);
if (nano < 0) nano = 0;
if (nano > dura) nano = dura;
// Set the media time
player.setMediaTime(new Time(nano));
if (player.getTargetState() < Player.Started)
    player.prefetch();
repaint();
   }
 

import javax.media.Player; //导入依赖的package包/类
/**
 * ControllerListener for the Players.
 */
public synchronized void controllerUpdate(ControllerEvent ce) {

    Player p = (Player) ce.getSourceController();

    if (p == null)
        return;

    // Get this when the internal players are realized.
    if (ce instanceof RealizeCompleteEvent) {
        p.start();
    }

    if (ce instanceof ControllerErrorEvent) {
        p.removeControllerListener(this);
        LOGGER.severe("Receiver internal error: " + ce);
    }

}