Custom data source allows to stream audio!
Hi all, I'm just trying to play some raw bytes of audio from a file any. The problem is that if I put some ContentLength for SourceStream and after he reached this value without audio plays furter:
package mypackage;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
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.protocol.ContentDescriptor;
import javax.microedition.media.protocol.DataSource;
import javax.microedition.media.protocol.SourceStream;
import net.rim.device.api.io.IOUtilities;
import net.rim.device.api.media.control.AudioPathControl;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
/**
* A class extending the MainScreen class, which provides default standard
* behavior for BlackBerry GUI applications.
*/
public final class MyScreen extends MainScreen implements FieldChangeListener,
PlayerListener {
private ButtonField playAudio;
private ButtonField stopAudio;
private LabelField status;
private byte[] dencoded = null;
private Player player = null;
private int len = 0;
private int curPos = 0;
/**
* Creates a new MyScreen object
*/
private SourceStream gogiStream = new SourceStream() {
ContentDescriptor mContentDescriptor = new ContentDescriptor(
"audio/x-pcm");
private static final int defSize = 320;
public int read(byte[] b, int offset, int length) throws IOException {
if(length <= defSize || offset >= (getContentLength() - defSize))
{
offset = 0;
length = (int) getContentLength();
// try {
// player = null;
// start();
// } catch (MediaException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// return (-1)*(offset);
}
int cur = 0;
while(cur
Y at - it an idea, how to play together audio without grouing the value of 64000, becuse I have has no need. If it will be successful I'll use for audio playback in real time.
OK, I SOLVED IT.
HERE IS THE CODE:
package mypackage;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
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.protocol.ContentDescriptor;
import javax.microedition.media.protocol.DataSource;
import javax.microedition.media.protocol.SourceStream;
import net.rim.device.api.io.IOUtilities;
import net.rim.device.api.media.control.AudioPathControl;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
/**
* A class extending the MainScreen class, which provides default standard
* behavior for BlackBerry GUI applications.
*/
public final class MyScreen extends MainScreen implements FieldChangeListener,
PlayerListener {
private ButtonField playAudio;
private ButtonField stopAudio;
private LabelField status;
private byte[] dencoded = null;
private Player player = null;
private int available = 0;
private int curPos = 0;
private long startTime;
private int totalLen;
private static final String content = "audio/x-pcm";
private boolean stopFlag = false;
/**
* Creates a new MyScreen object
*/
private SourceStream gogiStream = new SourceStream() {
private ContentDescriptor mContentDescriptor = new ContentDescriptor(
content);
private static final int defSize = 320;
public int read(byte[] b, int offset, int length) throws IOException {
if (startTime == 0) {
startTime = System.currentTimeMillis();
}
if (available <= 0) {
endStream();
}
int writtenLength = 0;
for (int i = 0; i < length; i++, curPos++) {
if (curPos < totalLen) {
b[offset + i] = dencoded[curPos];
--available;
++writtenLength;
} else {
endStream();
}
}
return writtenLength;
}
private void endStream() {
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
status.setText("THE END");
invalidate();
}
});
try {
stopFlag = true;
player.stop();
} catch (MediaException e) {
e.printStackTrace();
}
}
public ContentDescriptor getContentDescriptor() {
return mContentDescriptor;
}
public long getContentLength() {
return 64000;
}
public int getSeekType() {
return SourceStream.SEEKABLE_TO_START;
}
public int getTransferSize() {
return defSize * 1000;
}
public long seek(long where) throws IOException {
return where;
// throw new IOException("not seekable");
}
public long tell() {
return startTime == 0 ? 0
: (System.currentTimeMillis() - startTime);
// return 0;
}
public Control getControl(String controlType) {
return null;
}
public Control[] getControls() {
return null;
}
};
public MyScreen() {
// Set the displayed title of the screen
setTitle("AudioTest");
playAudio = new ButtonField("Play Audio");
playAudio.setChangeListener(this);
stopAudio = new ButtonField("Stop Audio");
stopAudio.setChangeListener(this);
HorizontalFieldManager hm = new HorizontalFieldManager();
hm.add(playAudio);
hm.add(stopAudio);
add(hm);
status = new LabelField();
add(status);
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
byte[] encoded = null;
encoded = readTextFile("file:///SDCard/BlackBerry/documents/soundTest.txt");
if (null != encoded) {
available = totalLen = dencoded.length;
} else {
UiApplication.getUiApplication().invokeLater(
new Runnable() {
public void run() {
Dialog.alert("File not read!");
}
});
}
}
});
}
private byte[] readTextFile(String fName) {
FileConnection fconn = null;
DataInputStream is = null;
byte[] data = null;
try {
fconn = (FileConnection) Connector.open(fName, Connector.READ);
is = fconn.openDataInputStream();
data = IOUtilities.streamToBytes(is);
} catch (IOException e) {
System.out.println(e.getMessage());
} finally {
try {
if (null != is)
is.close();
if (null != fconn)
fconn.close();
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
return data;
}
public void fieldChanged(Field field, int context) {
if (field == playAudio) {
try {
start();
} catch (Exception e) {
Dialog.alert(e.getMessage());
}
} else if (field == stopAudio) {
stop();
}
}
private void start() throws IOException, MediaException {
if (null == player) {
// //////////////////////// DataSource /////////////
player = Manager.createPlayer(new DataSource(null) {
SourceStream[] mStream = { gogiStream };
public void connect() throws IOException {
}
public void disconnect() {
}
public String getContentType() {
return content;
}
public SourceStream[] getStreams() {
return mStream;
}
public void start() throws IOException {
}
public void stop() throws IOException {
}
public Control getControl(String controlType) {
return null;
}
public Control[] getControls() {
return null;
}
});
// ///////////////////// DataSource ///////////////
// ///////////////ByteArrayInputStream/////////////////////////////
// ByteArrayInputStream theInput = new
// ByteArrayInputStream(dencoded);
// player = Manager.createPlayer(theInput, "audio/x-pcm");
// ///////////////ByteArrayInputStream/////////////////////////////
stopFlag = false;
curPos = 0;
status.setText("Playing...");
invalidate();
player.addPlayerListener(this);
player.realize();
AudioPathControl lPathCtr = (AudioPathControl) player
.getControl("net.rim.device.api.media.control.AudioPathControl");
lPathCtr.setAudioPath(AudioPathControl.AUDIO_PATH_HANDSET);
player.prefetch();
player.start();
}
}
private void restartPlayer() {
if (player != null) {
try {
if (player.getState() != player.CLOSED) {
player.stop();
player.start();
}
} catch (MediaException e) {
}
}
}
private void stop() {
if (player == null)
return;// nothing to stop
try {
if (player.getState() == Player.STARTED) {
player.stop();
}
if (player.getState() != Player.CLOSED) {
player.close();
}
player = null;
status.setText("Stopped!");
invalidate();
} catch (MediaException e) {
}
}
public void playerUpdate(Player player, String event, Object eventData) {
if (event.equals(PlayerListener.STOPPED)
|| event.equals(PlayerListener.END_OF_MEDIA)) {
if (!stopFlag) {
restartPlayer();
}
}
}
}
Heres the number 64000 is not fixed, then you can put any audio length.
For fair use to get some raw audio data files for example, you can save the microphone.
Tags: BlackBerry Developers
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