HARDWARE interfacing and software routines
Hello there,
I am interested in finding out a really basic tutorial/note which will allow me to work with the basic communication protocols like SPI , RS 232, etherner, USB, etc. I am looking for tutorial with BOTH HARDWARE interfacing and software routines.
Multiple websites will be ok for me.
I have searched wikipedia and lot of power point presentations but was not successful in landing up with a COMPLETE tutorial which explains the hardware interfacing connections and software.
If you guys can suggest an evaluation kit where i can pracice the above interfacing and software routine..... by all means do let me know.
Looking forward to your reply.
Technically you can do everything you are talking about for free provided you have the internet tool kit installed (Full Development Suite) and depending on what level of detail you plan on going into.
If you want to play with RS232 you can start with just taking the existing Labview example, "Basic Serial Write and Read.vi" under Labview Help -> Find Examples. You can find a serial cable and connect it to your Comm port. On the other end of the Comm port you can insert a small wire to short pin 2 to pin 3 (TX to RX). You will then be able to send and recieve data on the same vi. I would look at wikipedia to learn more: http://en.wikipedia.org/wiki/RS-232
If you have the internet tool kit install then you can do all kinds of stuff with just a regular internet connection. For example any place where you can Telnet you could test using the "Telnet Line Client.vi" provided by Labview. Again I would start by consulting wikipedia if you have questions: http://en.wikipedia.org/wiki/Telnet
If you are trying to do everything down to the hardware level then this is a little more involved. Again break your post into smaller pieces and repost on the Labview forum and you will have better luck getting detailed responses.
You should not have to spend much money to play around. You can build a lot of this stuff yourself or you can purchase very cheep if you shop around. For example you can implement SPI using a parallel port but you need to know what your target SPI interface will be. Regards, SS
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After running TX
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transmiter/server side code .first run TX on server
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.util.*;
import javax.media.rtp.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
public class Tx extends JFrame implements ActionListener, KeyListener,
MouseListener, WindowListener {
Vector targets;
JList list;
JButton startXmit;
JButton rtcp;
JButton update;
JButton expiration;
JButton statistics;
JButton addTarget;
JButton removeTarget;
JTextField tf_remote_address;
JTextField tf_remote_data_port;
JTextField tf_media_file;
JTextField tf_data_port;
TargetListModel listModel;
AVTransmitter avTransmitter;
RTCPViewer rtcpViewer;
JCheckBox cb_loop;
Config config;
public Tx() {
setTitle( "JMF/RTP Transmitter");
config= new Config();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
JPanel p= new JPanel();
p.setLayout( gridBagLayout);
JPanel localPanel= createLocalPanel();
gbc= new GridBagConstraints();
gbc.gridx= 0;
gbc.gridy= 0;
gbc.gridwidth= 2;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( localPanel, gbc);
p.add( localPanel);
JPanel targetPanel= createTargetPanel();
gbc= new GridBagConstraints();
gbc.gridx= 1;
gbc.gridy= 1;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( targetPanel, gbc);
p.add( targetPanel);
JPanel mediaPanel= createMediaPanel();
gbc= new GridBagConstraints();
gbc.gridx= 1;
gbc.gridy= 2;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( mediaPanel, gbc);
p.add( mediaPanel);
JPanel buttonPanel= new JPanel();
rtcp= new JButton( "RTCP Monitor");
update= new JButton( "Transmission Status");
update.setEnabled( false);
rtcp.addActionListener( this);
update.addActionListener( this);
buttonPanel.add( rtcp);
buttonPanel.add( update);
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 3;
gbc.gridwidth= 2;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( buttonPanel, gbc);
p.add( buttonPanel);
getContentPane().add( p);
list.addMouseListener( this);
addWindowListener( this);
pack();
setVisible( true);
private JPanel createMediaPanel() {
JPanel p= new JPanel();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
p.setLayout( gridBagLayout);
JLabel label= new JLabel( "Media Locator:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( label, gbc);
p.add( label);
tf_media_file= new JTextField( 35);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( tf_media_file, gbc);
p.add( tf_media_file);
tf_media_file.setText( config.media_locator);
cb_loop= new JCheckBox( "loop");
startXmit= new JButton( "Start Transmission");
startXmit.setEnabled( true);
startXmit.addActionListener( this);
gbc= new GridBagConstraints();
gbc.gridx = 2;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( cb_loop, gbc);
p.add( cb_loop);
cb_loop.setSelected( true);
cb_loop.addActionListener( this);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( startXmit, gbc);
p.add( startXmit);
TitledBorder titledBorder= new TitledBorder( new EtchedBorder(), "Source");
p.setBorder( titledBorder);
return p;
private JPanel createTargetPanel() {
JPanel p= new JPanel();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
p.setLayout( gridBagLayout);
targets= new Vector();
for( int i= 0; i < config.targets.size(); i++) {
targets.addElement( config.targets.elementAt( i));
listModel= new TargetListModel( targets);
list= new JList( listModel);
list.addKeyListener( this);
list.setPrototypeCellValue( "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
JScrollPane scrollPane= new JScrollPane( list,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
gbc= new GridBagConstraints();
gbc.gridx= 0;
gbc.gridy= 0;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( scrollPane, gbc);
p.add( scrollPane);
JPanel p1= new JPanel();
p1.setLayout( gridBagLayout);
JLabel label= new JLabel( "IP Address:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( label, gbc);
p1.add( label);
tf_remote_address= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( tf_remote_address, gbc);
p1.add( tf_remote_address);
label= new JLabel( "Data Port:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( label, gbc);
p1.add( label);
tf_remote_data_port= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( tf_remote_data_port, gbc);
p1.add( tf_remote_data_port);
JPanel p2= new JPanel();
addTarget= new JButton( "Add Target");
removeTarget= new JButton( "Remove Target");
p2.add( addTarget);
p2.add( removeTarget);
addTarget.addActionListener( this);
removeTarget.addActionListener( this);
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 2;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.gridwidth= 2;
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets( 20,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( p2, gbc);
p1.add( p2);
gbc= new GridBagConstraints();
gbc.gridx= 1;
gbc.gridy= 0;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( p1, gbc);
p.add( p1);
TitledBorder titledBorder= new TitledBorder( new EtchedBorder(), "Targets");
p.setBorder( titledBorder);
return p;
private JPanel createLocalPanel() {
JPanel p= new JPanel();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
p.setLayout( gridBagLayout);
JLabel label= new JLabel( "IP Address:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p.getLayout()).setConstraints( label, gbc);
p.add( label);
JTextField tf_local_host= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p.getLayout()).setConstraints( tf_local_host, gbc);
p.add( tf_local_host);
try {
String host= InetAddress.getLocalHost().getHostAddress();
tf_local_host.setText( host);
} catch( UnknownHostException e) {
label= new JLabel( "Data Port:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p.getLayout()).setConstraints( label, gbc);
p.add( label);
tf_data_port= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( tf_data_port, gbc);
p.add( tf_data_port);
tf_data_port.setText( config.local_data_port);
TitledBorder titledBorder= new TitledBorder( new EtchedBorder(), "Local Host");
p.setBorder( titledBorder);
return p;
public void actionPerformed( ActionEvent event) {
Object source= event.getSource();
if( source == addTarget) {
String ip= tf_remote_address.getText().trim();
String port= tf_remote_data_port.getText().trim();
String localPort= tf_data_port.getText().trim();
addTargetToList( localPort, ip, port);
if( avTransmitter != null) {
avTransmitter.addTarget( ip, port);
} else if( source == removeTarget) {
int index= list.getSelectedIndex();
if( index != -1) {
Target target= (Target) targets.elementAt( index);
if( avTransmitter != null) {
avTransmitter.removeTarget( target.ip, target.port);
targets.removeElement( target);
listModel.setData( targets);
} else if( source == startXmit) {
if( startXmit.getLabel().equals( "Start Transmission")) {
int data_port= new Integer( tf_data_port.getText()).intValue();
avTransmitter= new AVTransmitter( this, data_port);
avTransmitter.start( tf_media_file.getText().trim(), targets);
avTransmitter.setLooping( cb_loop.isSelected());
startXmit.setLabel( "Stop Transmission");
} else if( startXmit.getLabel().equals( "Stop Transmission")) {
avTransmitter.stop();
avTransmitter= null;
removeNonBaseTargets();
listModel.setData( targets);
startXmit.setLabel( "Start Transmission");
} else if( source == rtcp) {
if( rtcpViewer == null) {
rtcpViewer= new RTCPViewer();
} else {
rtcpViewer.setVisible( true);
rtcpViewer.toFront();
} else if( source == cb_loop) {
if( avTransmitter != null) {
avTransmitter.setLooping( cb_loop.isSelected());
private void removeNonBaseTargets() {
String localPort= tf_data_port.getText().trim();
for( int i= targets.size(); i > 0;) {
Target target= (Target) targets.elementAt( i - 1);
if( !target.localPort.equals( localPort)) {
targets.removeElement( target);
i--;
public void addTargetToList( String localPort,
String ip, String port) {
ListUpdater listUpdater= new ListUpdater( localPort, ip,
port, listModel, targets);
SwingUtilities.invokeLater( listUpdater);
public void rtcpReport( String report) {
if( rtcpViewer != null) {
rtcpViewer.report( report);
public void windowClosing( WindowEvent event) {
config.local_data_port= tf_data_port.getText().trim();
config.targets= new Vector();
for( int i= 0; i < targets.size(); i++) {
Target target= (Target) targets.elementAt( i);
if( target.localPort.equals( config.local_data_port)) {
config.addTarget( target.ip, target.port);
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public void windowClosed( WindowEvent event) {
public void windowDeiconified( WindowEvent event) {
public void windowIconified( WindowEvent event) {
public void windowActivated( WindowEvent event) {
public void windowDeactivated( WindowEvent event) {
public void windowOpened( WindowEvent event) {
public void keyPressed( KeyEvent event) {
public void keyReleased( KeyEvent event) {
Object source= event.getSource();
if( source == list) {
int index= list.getSelectedIndex();
public void keyTyped( KeyEvent event) {
public void mousePressed( MouseEvent e) {
public void mouseReleased( MouseEvent e) {
public void mouseEntered( MouseEvent e) {
public void mouseExited( MouseEvent e) {
public void mouseClicked( MouseEvent e) {
Object source= e.getSource();
if( source == list) {
int index= list.getSelectedIndex();
if( index != -1) {
Target target= (Target) targets.elementAt( index);
tf_remote_address.setText( target.ip);
tf_remote_data_port.setText( target.port);
int index= list.locationToIndex( e.getPoint());
public static void main( String[] args) {
new Tx();
class TargetListModel extends AbstractListModel {
private Vector options;
public TargetListModel( Vector options) {
this.options= options;
public int getSize() {
int size;
if( options == null) {
size= 0;
} else {
size= options.size();
return size;
public Object getElementAt( int index) {
String name;
if( index < getSize()) {
Target o= (Target)options.elementAt( index);
name= o.localPort + " ---> " + o.ip + ":" + o.port;
} else {
name= null;
return name;
public void setData( Vector data) {
options= data;
fireContentsChanged( this, 0, data.size());
class ListUpdater implements Runnable {
String localPort, ip, port;
TargetListModel listModel;
Vector targets;
public ListUpdater( String localPort, String ip, String port,
TargetListModel listModel, Vector targets) {
this.localPort= localPort;
this.ip= ip;
this.port= port;
this.listModel= listModel;
this.targets= targets;
public void run() {
Target target= new Target( localPort, ip, port);
if( !targetExists( localPort, ip, port)) {
targets.addElement( target);
listModel.setData( targets);
public boolean targetExists( String localPort, String ip, String port) {
boolean exists= false;
for( int i= 0; i < targets.size(); i++) {
Target target= (Target) targets.elementAt( i);
if( target.localPort.equals( localPort)
&& target.ip.equals( ip)
&& target.port.equals( port)) {
exists= true;
break;
return exists;
>>>>>>>>>>>>>>>>>
import java.awt.*;
import java.io.*;
import java.net.InetAddress;
import java.util.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.format.*;
import javax.media.control.TrackControl;
import javax.media.control.QualityControl;
import javax.media.rtp.*;
import javax.media.rtp.event.*;
import javax.media.rtp.rtcp.*;
public class AVTransmitter implements ReceiveStreamListener, RemoteListener,
ControllerListener {
// Input MediaLocator
// Can be a file or http or capture source
private MediaLocator locator;
private String ipAddress;
private int portBase;
private Processor processor = null;
private RTPManager rtpMgrs[];
private int localPorts[];
private DataSource dataOutput = null;
private int local_data_port;
private Tx tx;
public AVTransmitter( Tx tx, int data_port) {
this.tx= tx;
local_data_port= data_port;
* Starts the transmission. Returns null if transmission started ok.
* Otherwise it returns a string with the reason why the setup failed.
public synchronized String start( String filename, Vector targets) {
String result;
locator= new MediaLocator( filename);
// Create a processor for the specified media locator
// and program it to output JPEG/RTP
result = createProcessor();
if (result != null) {
return result;
// Create an RTP session to transmit the output of the
// processor to the specified IP address and port no.
result = createTransmitter( targets);
if (result != null) {
processor.close();
processor = null;
return result;
// Start the transmission
processor.start();
return null;
* Use the RTPManager API to create sessions for each media
* track of the processor.
private String createTransmitter( Vector targets) {
// Cheated. Should have checked the type.
PushBufferDataSource pbds = (PushBufferDataSource)dataOutput;
PushBufferStream pbss[] = pbds.getStreams();
rtpMgrs = new RTPManager[pbss.length];
localPorts = new int[ pbss.length];
SessionAddress localAddr, destAddr;
InetAddress ipAddr;
SendStream sendStream;
int port;
SourceDescription srcDesList[];
for (int i = 0; i < pbss.length; i++) {
// for (int i = 0; i < 1; i++) {
try {
rtpMgrs[i] = RTPManager.newInstance();
port = local_data_port + 2*i;
localPorts[ i]= port;
localAddr = new SessionAddress( InetAddress.getLocalHost(),
port);
rtpMgrs.initialize( localAddr);
rtpMgrs[i].addReceiveStreamListener(this);
rtpMgrs[i].addRemoteListener(this);
for( int k= 0; k < targets.size(); k++) {
Target target= (Target) targets.elementAt( k);
int targetPort= new Integer( target.port).intValue();
addTarget( localPorts[ i], rtpMgrs[ i], target.ip, targetPort + 2*i);
sendStream = rtpMgrs[i].createSendStream(dataOutput, i);
sendStream.start();
} catch (Exception e) {
e.printStackTrace();
return e.getMessage();
return null;
public void addTarget( String ip, String port) {
for (int i= 0; i < rtpMgrs.length; i++) {
int targetPort= new Integer( port).intValue();
addTarget( localPorts[ i], rtpMgrs[ i], ip, targetPort + 2*i);
public void addTarget( int localPort, RTPManager mgr, String ip, int port) {
try {
SessionAddress addr= new SessionAddress( InetAddress.getByName( ip),
new Integer( port).intValue());
mgr.addTarget( addr);
tx.addTargetToList( localPort + "", ip, port + "");
} catch( Exception e) {
e.printStackTrace();
public void removeTarget( String ip, String port) {
try {
SessionAddress addr= new SessionAddress( InetAddress.getByName( ip),
new Integer( port).intValue());
for (int i= 0; i < rtpMgrs.length; i++) {
rtpMgrs[ i].removeTarget( addr, "target removed from transmitter.");
} catch( Exception e) {
e.printStackTrace();
boolean looping= true;
public void controllerUpdate( ControllerEvent ce) {
System.out.println( ce);
if( ce instanceof DurationUpdateEvent) {
Time duration= ((DurationUpdateEvent) ce).getDuration();
System.out.println( "duration: " + duration.getSeconds());
} else if( ce instanceof EndOfMediaEvent) {
System.out.println( "END OF MEDIA - looping=" + looping);
if( looping) {
processor.setMediaTime( new Time( 0));
processor.start();
public void setLooping( boolean flag) {
looping= flag;
public void update( ReceiveStreamEvent event) {
String timestamp= getTimestamp();
StringBuffer sb= new StringBuffer();
if( event instanceof InactiveReceiveStreamEvent) {
sb.append( timestamp + " Inactive Receive Stream");
} else if( event instanceof ByeEvent) {
sb.append( timestamp + " Bye");
} else {
System.out.println( "ReceiveStreamEvent: "+ event);
tx.rtcpReport( sb.toString());
public void update( RemoteEvent event) {
String timestamp= getTimestamp();
if( event instanceof ReceiverReportEvent) {
ReceiverReport rr= ((ReceiverReportEvent) event).getReport();
StringBuffer sb= new StringBuffer();
sb.append( timestamp + " RR");
if( rr != null) {
Participant participant= rr.getParticipant();
if( participant != null) {
sb.append( " from " + participant.getCNAME());
sb.append( " ssrc=" + rr.getSSRC());
} else {
sb.append( " ssrc=" + rr.getSSRC());
tx.rtcpReport( sb.toString());
} else {
System.out.println( "RemoteEvent: " + event);
private String getTimestamp() {
String timestamp;
Calendar calendar= Calendar.getInstance();
int hour= calendar.get( Calendar.HOUR_OF_DAY);
String hourStr= formatTime( hour);
int minute= calendar.get( Calendar.MINUTE);
String minuteStr= formatTime( minute);
int second= calendar.get( Calendar.SECOND);
String secondStr= formatTime( second);
timestamp= hourStr + ":" + minuteStr + ":" + secondStr;
return timestamp;
private String formatTime( int time) {
String timeStr;
if( time < 10) {
timeStr= "0" + time;
} else {
timeStr= "" + time;
return timeStr;
* Stops the transmission if already started
public void stop() {
synchronized (this) {
if (processor != null) {
processor.stop();
processor.close();
processor = null;
for (int i= 0; i < rtpMgrs.length; i++) {
rtpMgrs[ i].removeTargets( "Session ended.");
rtpMgrs[ i].dispose();
public String createProcessor() {
if (locator == null) {
return "Locator is null";
DataSource ds;
DataSource clone;
try {
ds = javax.media.Manager.createDataSource(locator);
} catch (Exception e) {
return "Couldn't create DataSource";
// Try to create a processor to handle the input media locator
try {
processor = javax.media.Manager.createProcessor(ds);
processor.addControllerListener( this);
} catch (NoProcessorException npe) {
return "Couldn't create processor";
} catch (IOException ioe) {
return "IOException creating processor";
// Wait for it to configure
boolean result = waitForState(processor, Processor.Configured);
if (result == false)
return "Couldn't configure processor";
// Get the tracks from the processor
TrackControl [] tracks = processor.getTrackControls();
// Do we have atleast one track?
if (tracks == null || tracks.length < 1)
return "Couldn't find tracks in processor";
// Set the output content descriptor to RAW_RTP
// This will limit the supported formats reported from
// Track.getSupportedFormats to only valid RTP formats.
ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP);
processor.setContentDescriptor(cd);
Format supported[];
Format chosen;
boolean atLeastOneTrack = false;
// Program the tracks.
for (int i = 0; i < tracks.length; i++) {
Format format = tracks[i].getFormat();
if (tracks[i].isEnabled()) {
supported = tracks[i].getSupportedFormats();
// We've set the output content to the RAW_RTP.
// So all the supported formats should work with RTP.
// We'll just pick the first one.
if (supported.length > 0) {
if (supported[0] instanceof VideoFormat) {
// For video formats, we should double check the
// sizes since not all formats work in all sizes.
chosen = checkForVideoSizes(tracks[i].getFormat(),
supported[0]);
} else
chosen = supported[0];
tracks[i].setFormat(chosen);
System.err.println("Track " + i + " is set to transmit as:");
System.err.println(" " + chosen);
atLeastOneTrack = true;
} else
tracks[i].setEnabled(false);
} else
tracks[i].setEnabled(false);
if (!atLeastOneTrack)
return "Couldn't set any of the tracks to a valid RTP format";
// Realize the processor. This will internally create a flow
// graph and attempt to create an output datasource for JPEG/RTP
// audio frames.
result = waitForState(processor, Controller.Realized);
if (result == false)
return "Couldn't realize processor";
// Set the JPEG quality to .5.
setJPEGQuality(processor, 0.5f);
// Get the output data source of the processor
dataOutput = processor.getDataOutput();
return null;
static SessionAddress destAddr1, destAddr2;
* For JPEG and H263, we know that they only work for particular
* sizes. So we'll perform extra checking here to make sure they
* are of the right sizes.
Format checkForVideoSizes(Format original, Format supported) {
int width, height;
Dimension size = ((VideoFormat)original).getSize();
Format jpegFmt = new Format(VideoFormat.JPEG_RTP);
Format h263Fmt = new Format(VideoFormat.H263_RTP);
if (supported.matches(jpegFmt)) {
// For JPEG, make sure width and height are divisible by 8.
width = (size.width % 8 == 0 ? size.width :
(int)(size.width / 8) * 8);
height = (size.height % 8 == 0 ? size.height :
(int)(size.height / 8) * 8);
} else if (supported.matches(h263Fmt)) {
// For H.263, we only support some specific sizes.
if (size.width < 128) {
width = 128;
height = 96;
} else if (size.width < 176) {
width = 176;
height = 144;
} else {
width = 352;
height = 288;
} else {
// We don't know this particular format. We'll just
// leave it alone then.
return supported;
return (new VideoFormat(null,
new Dimension(width, height),
Format.NOT_SPECIFIED,
null,
Format.NOT_SPECIFIED)).intersects(supported);
* Setting the encoding quality to the specified value on the JPEG encoder.
* 0.5 is a good default.
void setJPEGQuality(Player p, float val) {
Control cs[] = p.getControls();
QualityControl qc = null;
VideoFormat jpegFmt = new VideoFormat(VideoFormat.JPEG);
// Loop through the controls to find the Quality control for
// the JPEG encoder.
for (int i = 0; i < cs.length; i++) {
if (cs[i] instanceof QualityControl &&
cs[i] instanceof Owned) {
Object owner = ((Owned)cs[i]).getOwner();
// Check to see if the owner is a Codec.
// Then check for the output format.
if (owner instanceof Codec) {
Format fmts[] = ((Codec)owner).getSupportedOutputFormats(null);
for (int j = 0; j < fmts.length; j++) {
if (fmts[j].matches(jpegFmt)) {
qc = (QualityControl)cs[i];
qc.setQuality(val);
System.err.println("- Setting quality to " +
val + " on " + qc);
break;
if (qc != null)
break;
* Convenience methods to handle processor's state changes.
private Integer stateLock = new Integer(0);
private boolean failed = false;
Integer getStateLock() {
return stateLock;
void setFailed() {
failed = true;
private synchronized boolean waitForState(Processor p, int state) {
p.addControllerListener(new StateListener());
failed = false;
// Call the required method on the processor
if (state == Processor.Configured) {
p.configure();
} else if (state == Processor.Realized) {
p.realize();
// Wait until we get an event that confirms the
// success of the method, or a failure event.
// See StateListener inner class
while (p.getState() < state && !failed) {
synchronized (getStateLock()) {
try {
getStateLock().wait();
} catch (InterruptedException ie) {
return false;
if (failed)
return false;
else
return true;
* Inner Classes
class StateListener implements ControllerListener {
public void controllerUpdate(ControllerEvent ce) {
// If there was an error during configure or
// realizI do this all the time, I put my MBP to a 60 inch Sharp. If you have the video working do the simple thing first. Check to make sure your sound is on your TV and Mac. Then if that doesn't work go to System Prefrences and under sound go to a tab called Output and see if your TV is listed and if it is change it to that setting
Hope It Works -
Remote Desktop Services - VDI / Hardware and Software requiremnts
I am going to plan to do POC for 50 user on customer end for Microsoft VDI installation. For this i required hardware and software requirement.
Hi Pratik,
Thank you for posting in Windows Server Forum.
It all depends on how you want to configure your VDI environment. In Server 2012\R2 there are 2 flavors: Pooled & Personal and further can deploy both that as Managed\UnManaged deployment. You can check following article for further details.
RDS Hardware Sizing and Capacity Planning Guidance
http://blogs.technet.com/b/iftekhar/archive/2010/02/10/rds-hardware-sizing-and-capacity-planning-guidance.aspx
Choose a VDI Deployment Scenario
http://technet.microsoft.com/en-us/library/dn645525.aspx
Deploying VDI for RDS 2012 / 2012R2 – Part I
http://thewolfblog.com/2014/03/26/deploying-vdi-for-rds-2012-2012r2-part-i/
Hope it helps!
Thanks.
Dharmesh Solanki
TechNet Community Support -
no i'm using iPhone 4 16GB. i want to know how long does it take for "Erase All Content and Settings"?does it affects to iPhone's hardware? and if i want to restore my software in iPhone back, how i can do it?
it takes hours
it does not damage or wear out hardware
and you can restore any backup afterwards as yo see fit -
I recently bought a dbx hardware compressor and am not quite sure how to use it in logic express 9. I hav a focusrite saffire 6 usb audio interface and am not dont how to use it in logic. Please help???
MUYconfundido wrote:
Pancenter,
Thanks for the response, but I do not have a midi interface. I am using a midi to usb connector cable, thus bypassing the need for a Midi interface.
The Mac reads the USB cable as a midi device, but not the keyboard that I am trying to use as a controller. I have tried it with my korg sp 300 and with my Nord Electro 2.
Thoughts?
Thanks,
Tristan
Tristan...
This is what you have, correct?
http://www.alesis.com/usbmidicable
This from Alesis..
"The AudioLink Series USB cable receives and outputs MIDI signal thanks to its internal interface. The USB-MIDI Cable connects plug-and-play to your Mac or PC for an all-in-one USB-MIDI solution."
Notice, -internal interface-. What you have is a simple USB MIDI Interface. Most MIDI interfaces are USB.
My point is (was), MIDI OUT of the Korg goes to the connector marked MIDI IN on the Alesis, those new to MIDI often get this wrong.
pancenter- -
I am putting together a proposal for a Final Cut Pro Workstation to use with a tapeless HD camera. Can anyone suggest the best camera (in the 5-10,000 dollar range) ? What hardware and software should I include in the package?
This is quite an open suggestion, but here are some ideas which might get you started. There are good HD cameras in your price range from Sony, Panasonic and Canon (and maybe other manufacturers). Tapeless formats vary. I have only worked with Sony XDCAM which seems pretty good to me. File sizes for material shot at 35MBS are not too huge and, with the free Sony transfer and conversion programme, are easy to bring into the computer via USB direct from the camera or from a fairly inexpensive converter. The Sony XDCAM EX3 can produce results well up to broadcast quality.
As to hardware, you'll need a powerful MAC - iMac, Macbook Pro or MacPro with 4GB or more of RAM and a good video card. Softwarewise, FCPX is quite a bit cheaper than FC Studio 3 and of course it's 64bit and can make better use of multi-core machines than FCP7. It's also designed to handle HD formats with less hassle than FCP7 and is matched to the latest versions of Motion and Compressor. But you'd probably be wise to search reviews of FCPX before you make your choice - it has some issues.
A good HD monitor will be essential and, for colour correction etc, you may want to consider a second monitor or HD TV foe editing. ( A MacPro is generally the best machine to connect a second monitor to).
This should give you a good editing system, but there are many other things you could add (Photoshop, professional sound monitors, etc)
Hope this helps a bit.
Jonathan -
Update hardware and software Qosmio G30-198 for hight performance
Good morning,
I have a Qosmio G30-198.
I Have to use Autodesk Civil 3D program in the laptop.
It is a CAD program that requires a lot of ram and a high speed data transmission with the HDD's.
For this, it is absolutely necessary to update hardware and software for to use Civil with good performance.
I need to buy and install SSD HDD, install more RAM (what is the maximum allowed in this computer?) and I need to install Win 7 Professional 64 bit.
Please,
if someone can tell me how I can further improve performance of the laptop, please tell me.
I do not know what steps I have to keep.
Can you help me?
Thank you so much.>.. what a disappointment
Why? How old is your notebook? At this time 4GB was the same when you use 8GB today.
We have mobile machines with limited upgrade possibilities.
> It is better to install hardware or soft ware? (Win 7 Proffesional)
To be honest I dont understand this question. You should upgrade RAM to the maximum level and install Win7. Im pretty sure it will work well on this old Qosmio.
If you need your notebook for some specific operations like usage of Autodesk Civil 3D program you dont even need all drivers or specific Toshiba stuff. the main thing is you have most important drivers, tools and utilities.
> I read in a post that it is necessary to change the video driver and install a diferent that the original one.
Fact is that Toshiba recommends usage of own drivers only. Toshiba offers tested and adapted drivers for usage on mobile machines. These different drivers can help notebook owner to have better graphic performance and this new driver will force graphic card to offer more power but at the same time you must understand that more performance results with more heat. Due to specific design it is very risky for notebooks.
Have you ever cleaned up your notebook? I can imagine it is pretty much dust inside.
> Do you think if I install G50 driver it will work in my G30?
Unfortunately I cannot comment this. Just be careful with this. -
What hardware and software is needed to use share point 2010
Please if enyone could help!
I want to become familiar with the advantages of using excel for example simultaneusly with other users, shere point does it best for us yes??? What do I need to install or what hardware is needed to do that?
Thanks,Here are the hardware and software requirements for SharePoint
http://technet.microsoft.com/en-us/library/cc262485(v=office.14).aspx
Paul Stork SharePoint Server MVP
Principal Architect: Blue Chip Consulting Group
Blog: http://dontpapanic.com/blog
Twitter: Follow @pstork
Please remember to mark your question as "answered" if this solves your problem.
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