videoplayer.java

J2ME application that captures video from on-board camera of SymbianOS Series60 3rd ed. mobile devic

package example.mmademo;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.ImageItem;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.Spacer;
import javax.microedition.lcdui.StringItem;
import javax.microedition.media.Control;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.GUIControl;
import javax.microedition.media.control.RateControl;
import javax.microedition.media.control.RecordControl;
import javax.microedition.media.control.VideoControl;
import javax.microedition.media.control.VolumeControl;

/**
 * Play Video/Capture in a Form using MMAPI
 *
 */
public class VideoPlayer extends Form
    implements Runnable, CommandListener, PlayerListener {

    private static final String TITLE_TEXT = "MobileVideoIP Player (Form) ";

    private static Player player = null;
    private static boolean isCapturePlayer;

    private static Image logo = null;

    private Display parentDisplay;
    private long duration;
    private final Command backCommand = new Command("Back", Command.BACK, 1);
    private final Command playCommand = new Command("Play", Command.ITEM, 1);
    private final Command snapCommand = new Command("Snapshot", Command.ITEM, 1);
    private final Command pauseCommand = new Command("Pause", Command.ITEM, 10);
    private Item videoItem;
    private StringItem status;
    private StringItem audioStatus;
    private StringItem time;

//    private RateControl rc;

    private int currentVolume;
    private boolean muted;
    private int currentRate = 100000;
    private VideoControl vidc;

    // pause/resume support
    private boolean suspended = false;
    private boolean restartOnResume = false;
    private long restartMediaTime;

    public VideoPlayer(Display parentDisplay) {
        super(TITLE_TEXT);

        this.parentDisplay = parentDisplay;
        initialize();
    }

    void initialize() {
        addCommand(backCommand);
        addCommand(snapCommand);
        setCommandListener(this);

        try {
	    if (logo == null)
		logo = Image.createImage("/icons/logo.png");
        } catch (Exception ex) {
            logo = null;
        }
        if ( logo == null)
            System.out.println("can not load logo.png");

    }

    /*
     * Respond to commands, including back
     */
    public void commandAction(Command c, Displayable s) {
        //try {
            if (s == this) {
                if (c == backCommand) {
                    close();
                    parentDisplay.setCurrent(VideoTest.getList());
                } 
                
                else if (videoItem != null && c == snapCommand) {
                    doSnapshot();
                } 
                
                else if (videoItem == null && c == pauseCommand) {
                    removeCommand(pauseCommand);
                    addCommand(playCommand);
                    pause();
                }
                
                else if (videoItem == null && c == playCommand) {
                    startPlaying();
                    removeCommand(playCommand);
                    addCommand(pauseCommand);
                }
            }
        //} catch (Exception e) {
        //    System.out.println("DEBUG: GOT EXCEPTION in VideoPlayer.commandAction("+c.toString()+","+s.toString()+")!");
        //    e.printStackTrace();
        //}
    }

    
    /**
     * Loops to see if volume and rate have been changed.
     */
    public void run() {
    	P.rint("VideoPlayer:run()");
    	
        //try {
            while (player != null) {
            	P.rint("VideoPlayer:run():while loop");
                // sleep 200 millis. If suspended, 
                // sleep until MIDlet is restarted
                do {
                    try {
                        Thread.sleep(200);
                    } catch (InterruptedException ie) {
                    }
                } while (player != null && suspended);

                synchronized (this) {
                    if (player == null)
                        return;


                    long k = player.getMediaTime();
                    time.setText("Pos: " + (k / 1000000) + "." + ((k / 10000) % 100));
                }
                
            }//while
            
            
        //} catch (Exception e) {
        //    System.out.println("DEBUG: GOT EXCEPTION in VideoPlayer.run()!");
        //    e.printStackTrace();
        //}
            
            
    }//run   /* */

    

    
    /**
     * Called by MIDlet after instantiating this object. 
     * Creates the player.  XXX
     */
    public void open(String url) {   //capture://video        theCamera
    	P.rint("VideoPlayer:open()");
        try {
            synchronized (this) {
                if ( player == null ) {

                    player = Manager.createPlayer(url);          //creating player for the url

                    
                    
                    player.addPlayerListener(this);
        		    isCapturePlayer = url.startsWith("capture:");
                }
            }
            player.realize();      //realise
            

            
            
         
            
            //set to use_gui_primitive
            if (  (vidc = (VideoControl) player.getControl("VideoControl")) != null  ) {
                videoItem = (Item)vidc.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, null);
                //vidc.setDisplaySize(240, 140);
                
            } else if (logo != null) {
                append(new ImageItem("", logo, ImageItem.LAYOUT_CENTER,""));
            }
            
           
            
            Control [] controls = player.getControls();

            for (int i = 0; i < controls.length; i++) {
                if (controls[i] instanceof GUIControl && controls[i] != vidc) {
                    append((Item) controls[i]);
                }


            }
            status = new StringItem("Status: ","");
    	    status.setLayout(Item.LAYOUT_NEWLINE_AFTER);
            append(status);

            
            
            
            time = new StringItem("","");
            time.setLayout(Item.LAYOUT_NEWLINE_AFTER);
            append(time);


            
            
            

            
            player.prefetch();
            
            
            
            if (videoItem == null)
                addCommand(pauseCommand);
            else {
                Spacer spacer = new Spacer(3, 10);
                spacer.setLayout(Item.LAYOUT_NEWLINE_BEFORE);
                append(spacer);
                append(videoItem);         ///append the videoItem, if don't append snapShot will get blank screen
    	    }
            
            
            
            //Thread t = new Thread(this);
            //t.start();      //loops to set display of volume and rate
            
        } catch (Exception ex) {
            error(ex);
            ex.printStackTrace();
            close();
        }
        
        
    }//open   /**/
    


    /**
     * Start
     */
    //XXX
    public void startPlaying() {
    	P.rint("VideoPlayer:startPlaying()");
        if (player == null)
            return;
        try {
        	
            duration = player.getDuration();
            
        	//P.rint("VideoPlayer:start(): duration is "+duration);            
            
            

            
            player.start();  //without this will get black square
            

           
           
            
        } catch (Exception ex) {
            System.err.println(ex);
            error(ex);
            close();
        }
        
        
    }//startPlaying

    
    
//  general purpose error method, displays on screen as well to output
    public void error(Exception e) {
    	Alert alert = new Alert("Error");
    alert.setString(e.getMessage());

    parentDisplay.setCurrent(alert);
    e.printStackTrace();
    } 
    
    public void error(String s) {
    	Alert alert = new Alert("Error");
    alert.setString(s);
    alert.setTimeout(2000);

    parentDisplay.setCurrent(alert, this);

    } 
    
    
    public void close() {
        synchronized (this) {
            pause();  //stop()
            if (player != null) {
                player.close();
                player = null;
            }
        }
        VideoTest.getInstance().nullPlayer();
    }

    
    
    public void pause() {
        if ( player != null)  {
            try {
                player.stop();
            } catch (MediaException me) {
            	System.err.println(me);
            }
        }
    }

    
    /**
     * Sets the text to show playing-state and rate.
     */
    private synchronized void updateStatus() {
        if (player == null)
            return;
        status.setText(