[moved] multiple players on N95

[jdesmedt]

Does the N95 phone suppport multiple players?
I have an application with two players (one is playing while the other is initialised)
When I realize the second player, I get an error:
Symbian OS Error: -45

And the first player stops playing...

The same program runned on a Nokia 6500c gives no problems.

[wizard_hu_]

Negative numbers are here: http://wiki.forum.nokia.com/index.php/Error_codes
Exactly what kind of players do you mean?

[jdesmedt]

private void prefetchNextVideo() {
        int prefetchIndex;
        if (firstChunk) {
            prefetchIndex = playingIndex;
        } else {
            prefetchIndex = playingIndex + 1 % player.length;
        }
        boolean hasNext = provider.hasNext();
        if (hasNext) {
            while (!provider.nextReady()) {
                try {
                    Thread.sleep(200);
                } catch (InterruptedException ex) {
                    ex.printStackTrace();
                }
            }
            try {
                player[prefetchIndex] = Manager.createPlayer(provider.nextVideoUrl());
                if (player[prefetchIndex] == null) {
                    throw new MediaException("Could not create a player");
                }
                //PlayerListener that tries to play the next part of the video if present
                player[prefetchIndex].addPlayerListener(new ChunkPlayerListener());
            realize(prefetchIndex);
            } catch (MediaException e) {
            } catch (IOException ie) {
            }
        } else {
            nextReady = false;
        }
    }



    /**
     * Is called to start playing and when END_OF_MEDIA has occurred
     */
    private void nextVideo() throws MediaException, IOException {
        playingIndex = playingIndex + 1 % player.length;
        try {
            if (firstChunk) {
                loadControl.startLoading();
                prefetchNextVideo(); //Only for the first part
            }
            while (player[playingIndex] == null) {
                LOGGER.info("nullplayer");
            }
            //Create the display component and add it to the videoContainer
            mc = new MediaComponent(player[playingIndex]);
            videoContainer.removeAll();
            videoContainer.addComponent(mc);
            //Display the video
            videoControl[playingIndex].setVisible(true);
            mc.setVisible(true);
            if (firstChunk) {
                firstChunk = false;
                loadControl.reportReadyToPlay();
            } else {
                mc.start();
            }
            prefetchNextVideo();
        } catch (IllegalStateException ie) {
        } catch (Exception e) {
        } finally {
            loadControl.stopLoading();
        }
    }

The ChunkPlayerListener calls nextVideo() when an END_OF_MEDIA event occurs

[jdesmedt]

I have written a testform that reproduces the error:
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.vodtec.mobile.lwuit;

import com.sun.lwuit.Command;
import com.sun.lwuit.Form;
import com.sun.lwuit.MediaComponent;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.layouts.BorderLayout;
import com.vodtec.mobile.media.LoggingPlayerListener;
import java.io.IOException;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VideoControl;
import javax.microedition.media.control.VolumeControl;

/**
 *
 * @author jdesmedt
 */
public class MultiplePlayerForm extends Form {

    
MediaComponent mc0;
MediaComponent mc1;
Player[] players;
    public MultiplePlayerForm(String url1, String url2, final Form parent) {
        super("VideoTest");
        Command back = new Command("Back") {

            public void actionPerformed(ActionEvent arg0) {
                parent.show();
                players[0].close();
                players[1].close();
                mc0.stop();
                mc1.stop();
            }
        };
        addCommand(back);
        setBackCommand(back);
        try {
            players = new Player[2];
            players[0] = Manager.createPlayer(url1);
            players[1] = Manager.createPlayer(url2);
            players[0].realize();
            players[0].prefetch();
            players[1].realize();
            players[1].prefetch();
            
            players[0].addPlayerListener(new LoggingPlayerListener("player 1"));
            players[1].addPlayerListener(new LoggingPlayerListener("player 2"));
            
            mc0 = new MediaComponent(players[0]);
            mc1 = new MediaComponent(players[1]);

            setLayout(new BorderLayout());
            addComponent(BorderLayout.WEST,mc0);
            addComponent(BorderLayout.EAST,mc1);


            mc0.setVisible(true);
            mc1.setVisible(true);
            
            VolumeControl voc = (VolumeControl) players[0].getControl("VolumeControl");
            voc.setMute(true);
            voc =  (VolumeControl) players[1].getControl("VolumeControl");
            voc.setMute(true);
            
            VideoControl vic = (VideoControl) players[0].getControl("VideoControl");
            vic.setDisplayLocation(0, 0);
            vic = (VideoControl) players[1].getControl("VideoControl");
            vic.setDisplayLocation(0, 100);

            mc0.start();
            mc1.start();

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

    }
}

The LoggingPlayerListener logs the events that occur.

When I execute this code on a Nokia N95 I get: Symbian OS error: -45 (What does this mean?)
When I execute this code on a Nokia 6500c I get: deviceUnavailable on the first player

[raj_J2ME]

Hi,
Just read the codes given by the wizard_hu_,
the same code you are asking is stand for -

The completion status when an outstanding client/server message is completed because a shared session has been closed.

[jdesmedt]

I have read the code, but I don't know what it means: the player plays local files and therefore does not connect to a server... How can there be a client/server problem??

[raj_J2ME]

Hi,
I guess it is due to expiring the session has been closed or expired,
just google it

[jdesmedt]

I have read on several forums and sites that Nokia supports multiple players.
Can anybody explain why my simple MultiplePlayerForm doesn't work??

Thanks

[jdesmedt]

Nobody ???

[shaii]

Hi,
i can confirm to you that N95 does support multiple players being initialized and even prefetch for some.
the thing u are describing can be a result of a network operator enforcing types of restrictios on phones.

for instance ALL sprint phones can only have 1 player in open state (doesnt matter if its in realize state or prefetch or started) if a second player is created the first player goes to close state at once....

so... which operator do u use? is the phone branded to that operator?


BR
shai

[jdesmedt]

The phone is not branded. It's a phone for test-purposes and doesn't even have a SIM-card inserted.
Is progressive download supported on the N95? (If this is supported I don't need to have multiple players.)

Thanks