IT. Expert System.

public class SimpleSessionDescription
extends Object

 SimpleSessionDescription description = new SimpleSessionDescription(
     System.currentTimeMillis(), "1.2.3.4");
 Media media = description.newMedia("audio", 56789, 1, "RTP/AVP");
 media.setRtpPayload(0, "PCMU/8000", null);
 media.setRtpPayload(8, "PCMA/8000", null);
 media.setRtpPayload(127, "telephone-event/8000", "0-15");
 media.setAttribute("sendrecv", "");
 

 v=0
 o=- 1284970442706 1284970442709 IN IP4 1.2.3.4
 s=-
 c=IN IP4 1.2.3.4
 t=0 0
 m=audio 56789 RTP/AVP 0 8 127
 a=rtpmap:0 PCMU/8000
 a=rtpmap:8 PCMA/8000
 a=rtpmap:127 telephone-event/8000
 a=fmtp:127 0-15
 a=sendrecv
 

• Nested Class Summary

  Nested Classes

  Modifier and Type	Class and Description
  static class	SimpleSessionDescription.Media This class represents a media description of a session description.

• Constructor Summary

  Constructors

  Constructor and Description
  SimpleSessionDescription(long sessionId, String address) Creates a minimal session description from the given session ID and unicast address.
  SimpleSessionDescription(String message) Creates a session description from the given message.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  String	encode() Encodes the session description and all its media descriptions in a string.
  String	getAddress() Returns the connection address or null if it is not present.
  String	getAttribute(String name) Returns the attribute of the given name or null if it is not present.
  String[]	getAttributeNames() Returns the names of all the attributes.
  int	getBandwidth(String type) Returns the bandwidth limit of the given type or -1 if it is not present.
  String[]	getBandwidthTypes() Returns the types of the bandwidth limits.
  String	getEncryptionKey() Returns the encryption key or null if it is not present.
  String	getEncryptionMethod() Returns the encryption method or null if it is not present.
  SimpleSessionDescription.Media[]	getMedia() Returns all the media descriptions in this session description.
  SimpleSessionDescription.Media	newMedia(String type, int port, int portCount, String protocol) Creates a new media description in this session description.
  void	setAddress(String address) Sets the connection address.
  void	setAttribute(String name, String value) Sets the attribute for the given name.
  void	setBandwidth(String type, int value) Sets the bandwith limit for the given type.
  void	setEncryption(String method, String key) Sets the encryption method and the encryption key.

  • Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Constructor Detail

  • SimpleSessionDescription

    public SimpleSessionDescription(long sessionId,
                            String address)

    Creates a minimal session description from the given session ID and unicast address. The address is used in the origin field ("o=") and the connection field ("c="). See SimpleSessionDescription for an example of its usage.

  • SimpleSessionDescription

    public SimpleSessionDescription(String message)

    Creates a session description from the given message.

    Throws:

    IllegalArgumentException - if message is invalid.

• Method Detail

  • newMedia

    public SimpleSessionDescription.Media newMedia(String type,
                                          int port,
                                          int portCount,
                                          String protocol)

    Creates a new media description in this session description.

    Parameters:

    type - The media type, e.g. "audio".

    port - The first transport port used by this media.

    portCount - The number of contiguous ports used by this media.

    protocol - The transport protocol, e.g. "RTP/AVP".

  • getMedia

    public SimpleSessionDescription.Media[] getMedia()

    Returns all the media descriptions in this session description.

  • encode

    public String encode()

    Encodes the session description and all its media descriptions in a string. Note that the result might be incomplete if a required field has never been added before.

  • getAddress

    public String getAddress()

    Returns the connection address or null if it is not present.

  • setAddress

    public void setAddress(String address)

    Sets the connection address. The field will be removed if the address is null.

  • getEncryptionMethod

    public String getEncryptionMethod()

    Returns the encryption method or null if it is not present.

  • getEncryptionKey

    public String getEncryptionKey()

    Returns the encryption key or null if it is not present.

  • setEncryption

    public void setEncryption(String method,
                     String key)

    Sets the encryption method and the encryption key. The field will be removed if the method is null.

  • getBandwidthTypes

    public String[] getBandwidthTypes()

    Returns the types of the bandwidth limits.

  • getBandwidth

    public int getBandwidth(String type)

    Returns the bandwidth limit of the given type or -1 if it is not present.

  • setBandwidth

    public void setBandwidth(String type,
                    int value)

    Sets the bandwith limit for the given type. The field will be removed if the value is negative.

  • getAttributeNames

    public String[] getAttributeNames()

    Returns the names of all the attributes.

  • getAttribute

    public String getAttribute(String name)

    Returns the attribute of the given name or null if it is not present.

  • setAttribute

    public void setAttribute(String name,
                    String value)

    Sets the attribute for the given name. The field will be removed if the value is null. To set a binary attribute, use an empty string as the value.