com.laserscorpion.rttapp.sip

Class SDPBuilder

java.lang.Object

com.laserscorpion.rttapp.sip.SDPBuilder

public class SDPBuilder
extends java.lang.Object

A collection of static helper methods to read and create SDP data, for the purpose of setting up RTT T140 calls

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SDPBuilder.mediaType

Constructor Summary

Constructors

Constructor and Description
SDPBuilder()

Method Summary

Modifier and Type	Method and Description
static android.javax.sip.message.Message	addSDPContentAndHeader(android.javax.sip.message.Message message, int preferredT140Map, int preferredRedMap, int port) Creates a copy of message and adds SDP content and header for RTT, according to the other params.
static java.lang.String	getRemoteIP(android.javax.sip.message.Message otherPartySDP) Get the remote IP address where the other party expects to receive text RTP
static int	getT140MapNum(android.javax.sip.message.Message incomingRequestResponse, SDPBuilder.mediaType mediaType) Get the mediatype from the other party's SDP, to know which stream is the primary T.140 and which is the redundant stream
static int	getT140PortNum(android.javax.sip.message.Message otherPartySDP) Get the remote port number where the other party expects to receive text RTP

Methods inherited from class java.lang.Object

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

Constructor Detail

SDPBuilder

public SDPBuilder()

Method Detail

addSDPContentAndHeader

public static android.javax.sip.message.Message addSDPContentAndHeader(android.javax.sip.message.Message message,
                                                                       int preferredT140Map,
                                                                       int preferredRedMap,
                                                                       int port)

Creates a copy of message and adds SDP content and header for RTT, according to the other params.

Parameters:

message - the message-in-progress that needs the SDP added. This message MUST already contain a Contact header that specifies the SIP user and local IP sending this message. It will likely throw a NPE if not present.

preferredT140Map - if this is a response to a request that proposed a T140 rtpmap, use that. Otherwise, use 0 for the default rtpmap num

preferredRedMap - if this is a response to a request that proposed a T140red rtpmap, use that. Otherwise: -Use 0 for the default T140red rtpmap num -Use -1 to not use redundancy at all

port - the local UDP port where the other party should send RTT

Returns:

a new copy of the message with the SDP added

getT140MapNum

public static int getT140MapNum(android.javax.sip.message.Message incomingRequestResponse,
                                SDPBuilder.mediaType mediaType)

Get the mediatype from the other party's SDP, to know which stream is the primary T.140 and which is the redundant stream

Parameters:

incomingRequestResponse - the incoming message containing the other party's SDP

mediaType - either T140 or T140red, for the redundant stream

Returns:

the t140 payload map number from the incoming SDP, or -1 if none

getT140PortNum

public static int getT140PortNum(android.javax.sip.message.Message otherPartySDP)

Get the remote port number where the other party expects to receive text RTP

Parameters:

otherPartySDP - the message containing the other party's preferred session description

Returns:

the port number

getRemoteIP

public static java.lang.String getRemoteIP(android.javax.sip.message.Message otherPartySDP)

Get the remote IP address where the other party expects to receive text RTP

Parameters:

otherPartySDP - the message containing the other party's preferred session description

Returns:

the IP address