/**
* $RCSfile: ,v $
* $Revision: $
* $Date: $
*
* Copyright (C) 2004-2011 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.java.sipmack.media;
import java.io.IOException;
import java.net.ServerSocket;
import javax.media.format.AudioFormat;
import javax.media.rtp.ReceiveStreamListener;
import org.jivesoftware.spark.phone.PhoneManager;
import org.jivesoftware.sparkimpl.settings.local.SettingsManager;
/**
* This Class implements a complete JingleMediaSession.
* It sould be used to transmit and receive audio captured from the Mic.
* This Class should be automaticly controlled by JingleSession.
* But you could also use in any VOIP application.
* For better NAT Traversal support this implementation don�t support only receive or only transmit.
* To receive you MUST transmit. So the only implemented and functionally methods are startTransmit() and stopTransmit()
*
* @author Thiago Camargo
*/
public class AudioMediaSession {
private AudioChannel audioChannel;
private String locator = "javasound://";
// AudioFormat of the Session
private AudioFormat audioFormat;
// Local Transport details
private TransportCandidate local;
// Remote Transport details
private TransportCandidate remote;
/**
* Creates a AudioMediaSession with defined payload type, remote and local candidates
*
* @param audioFormat jmf AudioFormat
* @param remote The remote information. The candidate that the jmf will be sent to.
* @param local The local information. The candidate that will receive the jmf
*/
public AudioMediaSession(final AudioFormat audioFormat, final TransportCandidate remote,
final TransportCandidate local) {
this(audioFormat, remote, local, SettingsManager.getLocalPreferences().getAudioDevice());
}
/**
* Creates a AudioMediaSession with defined payload type, remote and local candidates
*
* @param audioFormat Payload of the jmf
* @param remote The remote information. The candidate that the jmf will be sent to.
* @param local The local information. The candidate that will receive the jmf
*/
public AudioMediaSession(final AudioFormat audioFormat, final TransportCandidate remote,
final TransportCandidate local, String locator) {
this.local = local;
this.remote = remote;
this.audioFormat = audioFormat;
if (locator != null && !locator.equals(""))
this.locator = locator;
initialize();
}
/**
* Returns the AudioFormat of the Media Session
*
* @return
*/
public AudioFormat getAudioFormat() {
return audioFormat;
}
/**
* Returns the Media Session local Candidate
*
* @return
*/
public TransportCandidate getLocal() {
return local;
}
/**
* Returns the Media Session remote Candidate
*
* @return
*/
public TransportCandidate getRemote() {
return remote;
}
/**
* Initialize the Audio Channel to make it able to send and receive audio
*/
public void initialize() {
String ip;
String localIp;
int localPort;
int remotePort;
if (this.getLocal().getSymmetric() != null) {
ip = this.getLocal().getIp();
localIp = this.getLocal().getLocalIp();
localPort = getFreePort();
remotePort = this.getLocal().getSymmetric().getPort();
System.out.println(this.getLocal().getConnection() + " " + ip + ": " + localPort + "->" + remotePort);
} else {
ip = this.getRemote().getIp();
localIp = this.getLocal().getLocalIp();
localPort = this.getLocal().getPort();
remotePort = this.getRemote().getPort();
}
audioChannel = new AudioChannel(PhoneManager.getMediaLocator(locator), localIp, ip, localPort, remotePort, audioFormat);
}
/**
* Add Receive Listeners. It monitors RTCP packets and signalling.
*
* @param listener listener to add
*/
public void addReceiverListener(ReceiveStreamListener listener) {
audioChannel.addReceiverListener(listener);
}
/**
* Removes Receive Listener.
*
* @param listener listener to remove
*/
public void removeReceiverListener(ReceiveStreamListener listener) {
audioChannel.removeReceiverListener(listener);
}
/**
* Starts transmission and for NAT Traversal reasons start receiving also.
*/
public void startTrasmit() {
audioChannel.start();
}
/**
* Set transmit activity. If the active is true, the instance should trasmit.
* If it is set to false, the instance should pause transmit.
*
* @param active
*/
public void setTrasmit(boolean active) {
audioChannel.setTrasmit(active);
}
/**
* For NAT Reasons this method does nothing. Use startTransmit() to start transmit and receive jmf
*/
public void startReceive() {
// Do nothing
}
/**
* Stops transmission and for NAT Traversal reasons stop receiving also.
*/
public void stopTrasmit() {
if (audioChannel != null)
audioChannel.stop();
}
/**
* For NAT Reasons this method does nothing. Use startTransmit() to start transmit and receive jmf
*/
public void stopReceive() {
// Do nothing
}
/**
* Closes and finalizes the session.
* Very important to release static MediaLocator.
*/
public void close(){
stopTrasmit();
stopReceive();
PhoneManager.setUsingMediaLocator(false);
}
/**
* Obtain a free port we can use.
*
* @return A free port number.
*/
protected int getFreePort() {
ServerSocket ss;
int freePort = 0;
for (int i = 0; i < 10; i++) {
freePort = (int) (10000 + Math.round(Math.random() * 10000));
freePort = freePort % 2 == 0 ? freePort : freePort + 1;
try {
ss = new ServerSocket(freePort);
freePort = ss.getLocalPort();
ss.close();
return freePort;
}
catch (IOException e) {
e.printStackTrace();
}
}
try {
ss = new ServerSocket(0);
freePort = ss.getLocalPort();
ss.close();
}
catch (IOException e) {
e.printStackTrace();
}
return freePort;
}
}