H323_RTPChannel Class Reference

#include <h323rtp.h>

Inheritance diagram for H323_RTPChannel:

Collaboration diagram for H323_RTPChannel:

Public Member Functions
Construction
	H323_RTPChannel (H323Connection &connection, const H323Capability &capability, Directions direction, OpalMediaSession &session)
	~H323_RTPChannel ()
	Destroy the channel. More...
Overrides from class H323Channel
virtual unsigned	GetSessionID () const
virtual bool	SetSessionID (unsigned sessionID)
virtual PBoolean	GetMediaTransportAddress (OpalTransportAddress &data, OpalTransportAddress &control) const
Overrides from class H323_RealTimeChannel
virtual PBoolean	OnSendingPDU (H245_H2250LogicalChannelParameters &param) const
virtual PBoolean	OnSendingAltPDU (H245_ArrayOf_GenericInformation &alternate) const
virtual void	OnSendOpenAck (H245_H2250LogicalChannelAckParameters &param) const
virtual PBoolean	OnReceivedPDU (const H245_H2250LogicalChannelParameters &param, unsigned &errorCode)
virtual PBoolean	OnReceivedAckPDU (const H245_H2250LogicalChannelAckParameters &param)
Operations
virtual void	OnSendRasInfo (H225_RTPSession &info)
Public Member Functions inherited from H323_RealTimeChannel
	H323_RealTimeChannel (H323Connection &connection, const H323Capability &capability, Directions direction)
virtual PBoolean	OnSendingPDU (H245_OpenLogicalChannel &openPDU) const
virtual void	OnSendOpenAck (const H245_OpenLogicalChannel &open, H245_OpenLogicalChannelAck &ack) const
virtual PBoolean	OnReceivedPDU (const H245_OpenLogicalChannel &pdu, unsigned &errorCode)
virtual PBoolean	OnReceivedAckPDU (const H245_OpenLogicalChannelAck &pdu)
RTP_DataFrame::PayloadTypes	GetDynamicRTPPayloadType () const
Public Member Functions inherited from H323UnidirectionalChannel
	H323UnidirectionalChannel (H323Connection &connection, const H323Capability &capability, Directions direction)
	~H323UnidirectionalChannel ()
virtual Directions	GetDirection () const
virtual PBoolean	SetInitialBandwidth ()
virtual bool	PreOpen ()
virtual PBoolean	Open ()
virtual bool	UpdateMediaFormat (const OpalMediaFormat &mediaFormat)
	Update media format options. More...
virtual OpalMediaStreamPtr	GetMediaStream () const
virtual void	SetMediaStream (OpalMediaStreamPtr mediaStream)
Public Member Functions inherited from H323Channel
	H323Channel (H323Connection &connection, const H323Capability &capability)
	~H323Channel ()
virtual void	PrintOn (ostream &strm) const
const H323ChannelNumber &	GetNumber () const
void	SetNumber (const H323ChannelNumber &num)
const H323ChannelNumber &	GetReverseChannel () const
void	SetReverseChannel (const H323ChannelNumber &num)
OpalBandwidth	GetBandwidthUsed () const
bool	SetBandwidthUsed (OpalBandwidth bandwidth)
const H323Capability &	GetCapability () const
OpalMediaFormat	GetMediaFormat () const
	Get the media format (from capability) More...
virtual void	Close ()
PBoolean	IsOpen () const
virtual void	OnFlowControl (long bitRateRestriction)
virtual void	OnMiscellaneousCommand (const H245_MiscellaneousCommand_type &type)
virtual void	OnMiscellaneousIndication (const H245_MiscellaneousIndication_type &type)
virtual void	OnJitterIndication (DWORD jitter, int skippedFrameCount, int additionalBuffer)

Protected Member Functions
virtual bool	ExtractTransport (const H245_TransportAddress &pdu, bool isDataPort, unsigned &errorCode)
Protected Member Functions inherited from H323UnidirectionalChannel
virtual void	InternalClose ()

Protected Attributes
OpalMediaSession *	m_session
Protected Attributes inherited from H323UnidirectionalChannel
bool	receiver
OpalMediaStreamPtr	m_mediaStream
Protected Attributes inherited from H323Channel
H323EndPoint &	endpoint
H323Connection &	connection
H323Capability *	capability
H323ChannelNumber	number
H323ChannelNumber	reverseChannel
bool	opened
atomic< bool >	m_terminating

Detailed Description

This class is for encpsulating the IETF Real Time Protocol interface.

Constructor & Destructor Documentation

H323_RTPChannel::H323_RTPChannel	(	H323Connection &	connection,
		const H323Capability &	capability,
		Directions	direction,
		OpalMediaSession &	session
	)

Create a new channel.

Parameters

connection	Connection to endpoint for channel
capability	Capability channel is using
direction	Direction of channel
session	Session for channel

H323_RTPChannel::~H323_RTPChannel

(

)

Destroy the channel.

Member Function Documentation

virtual bool H323_RTPChannel::ExtractTransport ( const H245_TransportAddress &  pdu, bool  isDataPort, unsigned &  errorCode  )

protectedvirtual

virtual PBoolean H323_RTPChannel::GetMediaTransportAddress ( OpalTransportAddress &  data, OpalTransportAddress &  control  ) const

virtual

Get the media transport address for the connection. This is primarily used to determine if media bypass is possible for the call between two connections.

The default behaviour returns false.

Parameters

data	Data channel address
control	Control channel address

Reimplemented from H323Channel.

virtual unsigned H323_RTPChannel::GetSessionID ( ) const

virtual

Indicate the session number of the channel. Return session for channel. This returns the session ID of the H323RTPSession member variable.

Reimplemented from H323Channel.

virtual PBoolean H323_RTPChannel::OnReceivedAckPDU ( const H245_H2250LogicalChannelAckParameters &  param )

virtual

This is called after a request to create a channel occurs from the local machine via the H245LogicalChannelDict::Open() function, and the request has been acknowledged by the remote endpoint.

The default behaviour sets the remote ports to send UDP packets to.

Parameters

param

Acknowledgement PDU

Reimplemented from H323_RealTimeChannel.

virtual PBoolean H323_RTPChannel::OnReceivedPDU ( const H245_H2250LogicalChannelParameters &  param, unsigned &  errorCode  )

virtual

This is called after a request to create a channel occurs from the local machine via the H245LogicalChannelDict::Open() function, and the request has been acknowledged by the remote endpoint.

The default behaviour sets the remote ports to send UDP packets to.

Parameters

param	Acknowledgement PDU
errorCode	Error on failure

Reimplemented from H323_RealTimeChannel.

virtual PBoolean H323_RTPChannel::OnSendingAltPDU ( H245_ArrayOf_GenericInformation &  alternate ) const

virtual

Alternate RTP port information for Same NAT

Parameters

alternate

Alternate RTP ports

Implements H323_RealTimeChannel.

virtual PBoolean H323_RTPChannel::OnSendingPDU ( H245_H2250LogicalChannelParameters &  param ) const

virtual

Fill out the OpenLogicalChannel PDU for the particular channel type.

Parameters

param

Open PDU to send.

Reimplemented from H323_RealTimeChannel.

virtual void H323_RTPChannel::OnSendOpenAck ( H245_H2250LogicalChannelAckParameters &  param ) const

virtual

This is called when request to create a channel is received from a remote machine and is about to be acknowledged.

Parameters

param

Acknowledgement PDU

Reimplemented from H323_RealTimeChannel.

virtual void H323_RTPChannel::OnSendRasInfo ( H225_RTPSession &  info )

virtual

This is called when a gatekeeper wants to get status information from the endpoint.

The default behaviour calls the ancestor functon and then fills in the transport fields.

Parameters

info	RTP session info PDU

virtual bool H323_RTPChannel::SetSessionID ( unsigned  sessionID )

virtual

Set the session number of the channel. During OLC negotations teh master may change the session number being used for the logical channel.

Returns false if the session could not be renumbered.

Parameters

sessionID

New session ID

Reimplemented from H323Channel.

Field Documentation

OpalMediaSession* H323_RTPChannel::m_session

protected

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The documentation for this class was generated from the following file:

• h323rtp.h