How to play & record audio byte arrays with j2me on nokia

[mmbabele]

- How do i play a series of audio byte arrays with j2me?
- How do i take the micro phone audio input and extra the audio as a series of byte arrays?
been working to sort that out for a week now!
thanks...

[aj4mobile]

See the code below, ( in this the mobile application get sound files from the server and runs one by one). This will be helpful for your requirement.
import java.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.media.Player;
import javax.microedition.media.Manager;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.*;
import javax.microedition.rms.*;
import javax.microedition.io.*;


public class LoadCanvas extends Canvas implements CommandListener,PlayerListener,Runnable
{
Player[] music;
Player currentPlayer;
private RecordStore rs;
private DataInputStream din;
private ContentConnection connection;
private Command play;
private Command exit;
private LoadRosary midlet;
private Thread thread;

private int incPlay; // To increment the player..
private static final int VOLUME_LEVEL=50; // Initial sound level
private int volumeSetting = VOLUME_LEVEL; // Tracks the sound level
private boolean volumeMuted=false; // Tracks whether muted or not.
private Image rosaryImg;
private int songArray[] = new int[88];
private int recid;

private final static String[] musicUrl ={
"http://202.63.115.10/ob/rosary/INTRODUCTION.amr", //0
"http://202.63.115.10/ob/rosary/FIRST_SORROWFUL.amr", //1
"http://202.63.115.10/ob/rosary/SECOND_SORROWFUL.amr", //2
"http://202.63.115.10/ob/rosary/THIRD_SORROWFUL.amr", //3
"http://202.63.115.10/ob/rosary/FOURTH_SORROWFUL.amr", //4
"http://202.63.115.10/ob/rosary/FIFTH_SORROWFUL.amr", //5
"http://202.63.115.10/ob/rosary/MYSTERY_SONG.amr", //6

"http://202.63.115.10/ob/rosary/1_IN_THE_NAME_OF.amr", //7
"http://202.63.115.10/ob/rosary/2_I_BELIEVE_IN_GOD.amr", //8
"http://202.63.115.10/ob/rosary/3_OUR_FATHER.amr", //9
"http://202.63.115.10/ob/rosary/4_HAIL_MARY.amr", //10
"http://202.63.115.10/ob/rosary/5_GLORY_BE.amr", //11
"http://202.63.115.10/ob/rosary/6_O_MY_JESUS.amr", //12
"http://202.63.115.10/ob/rosary/7_HAIL_HOLY_QUEEN.amr", //13
"http://202.63.115.10/ob/rosary/8_O_GOD_WHOSE.amr" //14
};

public LoadCanvas(LoadRosary midlet)
{
this.midlet = midlet;
play = new Command("Play",Command.SCREEN,1);
exit = new Command("Exit",Command.EXIT,2);
addCommand(play);
addCommand(exit);
setCommandListener(this);
incPlay =0;
try{
rosaryImg = Image.createImage("/rosary.png");
rs = RecordStore.openRecordStore("Ros",true);

if(rs.getNumRecords()==0)
{
loadViaHttp();
System.out.println(" Num Records ;"+rs.getNumRecords());
}

} catch(Exception ex){}
thread = new Thread(this);
thread.start();
}

public void run()
{
try{
if(rs.getNumRecords() > 0)
{
playFromRms();
}
}catch(Exception e) {}
}


public void paint(Graphics g)
{
g.drawImage(rosaryImg,0,0,20);
g.setColor(255,128,0);
g.drawString("Sorrowful Mystery",(getWidth())/2,2, g.TOP|g.HCENTER);
}

// To load from the server...............//
public void loadViaHttp()
{
try{
byte [] byteAudio;
for(int i=0;i<musicUrl.length;i++){
connection = (ContentConnection)Connector.open(musicUrl[i]);
din = connection.openDataInputStream();
int length = -1; // (int)connection.getLength();
if(length != -1)
{
byteAudio = new byte[length];
din.readFully(byteAudio);
recid=rs.addRecord(byteAudio,0,byteAudio.length);
}
else // If length not available.......
{
ByteArrayOutputStream bstr = new ByteArrayOutputStream();
int ch;
while(( ch=din.read())!=-1)
bstr.write(ch);
byteAudio = bstr.toByteArray();
recid =rs.addRecord(byteAudio,0,byteAudio.length);
}
din.close();
connection.close();

}
System.out.println(" Total records; " +rs.getNumRecords());
}catch(Exception e) {
e.printStackTrace();
System.out.println("Exception in Loading.."+e);
}
}

// To play files from RMS........
public void playFromRms()
{
music=new Player[musicUrl.length+1];
try {
for(int i=1;i<=musicUrl.length;i++)
{
InputStream is = new ByteArrayInputStream(rs.getRecord(i));
music[i-1] = Manager.createPlayer(is,"audio/amr");
}
System.out.println(" Total records;in playfrom rms " +rs.getNumRecords());
soundInitialise();
music[0].realize();
music[0].prefetch();
startPlayer(0);
music[7].realize();
}catch(Exception e) {System.out.println("Excepion in Play rms"+e);}
}


private void startPlayer(int numAmr)
{
if(numAmr<musicUrl.length)
{
try{
// music[numAmr].realize();
music[songArray[numAmr]].prefetch();
if(incPlay <87)music[songArray[numAmr]].start();
currentPlayer = music[songArray[numAmr]];
currentPlayer.addPlayerListener(this);
if(numAmr+1<songArray.length)music[songArray[numAmr+1]].realize();
System.out.println(" playing..: " +numAmr + " Song: "+musicUrl[numAmr].substring(30,43));
// To control the volume...
VolumeControl vc = (VolumeControl)currentPlayer.getControl("VolumeControl");
vc.setLevel(VOLUME_LEVEL);
}catch(Exception e){e.printStackTrace();
System.out.println("Exception in Start player"+e);}
}
}

private void soundInitialise()
{
arrayInit(0,0,7); // In the name of
arrayInit(1,1,8); // I believe in
arrayInit(2,2,9); // our father .
arrayInit(3,5,10); //.Hail mary.
arrayInit(6,6,11); // glory be .
arrayInit(7,7,12); // Oh my jesus..

arrayInit(8,8,6); // Mystery song....
arrayInit(9,9,1); // first decade announce;
arrayInit(10,10,9); // our father.
arrayInit(11,20,10); // Hail mary..
arrayInit(21,21,11); // Glory be.
arrayInit(22,22,12); // Oh my jesus..

arrayInit(23,23,6); // Mystery song..
arrayInit(24,24,2); // Second decade..
arrayInit(25,25,9); // our father.
arrayInit(26,35,10); // hail mary.
arrayInit(36,36,11); // Glory be.
arrayInit(37,37,12); // Oh my jesus.

arrayInit(38,38,6); // mystey song..
arrayInit(39,39,3); // Third decade announce.
arrayInit(40,40,9); // our father ..
arrayInit(41,50,10); // Hail mary..
arrayInit(51,51,11); // Glory be.
arrayInit(52,52,12); // Oh my jesus.

arrayInit(53,53,6); // Mystery song......
arrayInit(54,54,4); // Fourth decade announce..
arrayInit(55,55,9); // our father
arrayInit(56,65,10); // hail mary;
arrayInit(66,66,11); // Glory be
arrayInit(67,67,12); // oh my jesus.

arrayInit(68,68,6); // Mystery song..
arrayInit(69,69,5); // Fifth decade announce..
arrayInit(70,70,9); // our father.
arrayInit(71,80,10); // Hail mary
arrayInit(81,81,11); // Glory be..
arrayInit(82,82,12); // Oh my jesus.

arrayInit(83,83,6); // Mystery song..
arrayInit(84,84,13); // Concl: Hail Holy queen
arrayInit(85,85,14); // Oh god whose..
arrayInit(86,86,7); // In the name ..
}

private void arrayInit(int start,int end,int songId)
{
int i=start;
do{
songArray[start]=songId;
start+=1;
}while(start<=end);
}

public void playerUpdate(Player player, String event, Object data)
{
if(event.equals(PlayerListener.END_OF_MEDIA))
{
startPlayer(incPlay);//songArray[incPlay]
incPlay +=1;
// System.out.println(" Inc Play :"+incPlay);


}
}


protected void keyPressed(int keyCode)
{
switch(getGameAction(keyCode))
{
case LEFT:
adjustVolume(-5,false);
break;
case RIGHT:
adjustVolume(+5,false);
break;
case FIRE:
adjustVolume(0,true);
break;
}
}

public void commandAction(Command c, Displayable d)
{
if(c == exit)
midlet.exitMidlet();
else if(c ==play)
{
try{
if(rs.getNumRecords() >0)
playFromRms();
}catch(Exception e) { System.out.println("Exception."+e);}

}
}

// Adjust the Volume.........//
private void adjustVolume(int incr, boolean isMute)
{
VolumeControl vc= (VolumeControl)currentPlayer.getControl("VolumeControl");
if(vc!=null)
{
volumeSetting = vc.getLevel();
if(isMute !=true)
{
volumeSetting += incr;
volumeSetting = vc.setLevel(volumeSetting);
System.out.println("Volume.."+volumeSetting);
}
else
{
vc.setMute(!vc.isMuted());
volumeMuted = vc.isMuted();
}
}
}

}