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Public Member Functions | Protected Attributes
H323_T120Channel Class Reference

`#include <h323t120.h>`

Inheritance diagram for H323_T120Channel:

## Public Member Functions

virtual void | HandleChannel ()
Construction
| H323_T120Channel (H323Connection &connection, const H323Capability &capability, Directions direction, unsigned sessionID)
Overrides from class H323Channel
virtual void | Receive ()
virtual void | Transmit ()
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)
Public Member Functions inherited from H323DataChannel
| H323DataChannel (H323Connection &connection, const H323Capability &capability, Directions direction, unsigned sessionID)
| ~H323DataChannel ()
virtual unsigned | GetSessionID () const
virtual PBoolean | CreateListener ()
virtual PBoolean | CreateTransport ()
Public Member Functions inherited from H323UnidirectionalChannel
| H323UnidirectionalChannel (H323Connection &connection, const H323Capability &capability, Directions direction)
| ~H323UnidirectionalChannel ()
virtual Directions | GetDirection () const
virtual PBoolean | SetInitialBandwidth ()
virtual PBoolean | Open ()
virtual PBoolean | Start ()
virtual OpalMediaStreamPtr | GetMediaStream () const
Public Member Functions inherited from H323Channel
virtual bool | OnMediaCommand (const OpalMediaCommand &)
| 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)
unsigned | GetBandwidthUsed () const
PBoolean | SetBandwidthUsed (unsigned bandwidth)
const H323Capability & | GetCapability () const
PBoolean | IsPaused () const
void | SetPause (PBoolean pause)
virtual bool | SetSessionID (unsigned sessionID)
virtual PBoolean | GetMediaTransportAddress (OpalTransportAddress &data, OpalTransportAddress &control) const
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 Attributes

OpalT120Protocol * | t120handler
Protected Attributes inherited from H323DataChannel
unsigned | sessionID
H323Listener * | listener
PBoolean | autoDeleteListener
H323Transport * | transport
PBoolean | autoDeleteTransport
PBoolean | separateReverseChannel
Protected Attributes inherited from H323UnidirectionalChannel
bool | receiver
OpalMediaStreamPtr | mediaStream
Protected Attributes inherited from H323Channel
H323EndPoint & | endpoint
H323Connection & | connection
H323Capability * | capability
H323ChannelNumber | number
H323ChannelNumber | reverseChannel
bool | opened
bool | paused
PAtomicInteger | m_terminating

## Additional Inherited Members

Protected Member Functions inherited from H323DataChannel
virtual void | InternalClose ()

## Detailed Description

This class describes the T.120 logical channel.

## Constructor & Destructor Documentation

H323_T120Channel::H323_T120Channel | ( | H323Connection & | connection,
|  | const H323Capability & | capability,
|  | Directions | direction,
|  | unsigned | sessionID
| ) |  |

Create a new channel.

Parameters:

  connection | Connection to endpoint for channel
  capability | Capability channel is using
  direction | Direction of channel
  sessionID | Session ID for channel

## Member Function Documentation

virtual void H323_T120Channel::HandleChannel | ( |  | ) |

virtual

virtual PBoolean H323_T120Channel::OnReceivedAckPDU | ( | const H245_OpenLogicalChannelAck & | pdu | ) |

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 makes sure the parameters are compatible and passes on the PDU to the rtp session.

Parameters:

  pdu | Acknowledgement PDU

Reimplemented from H323DataChannel.

virtual PBoolean H323_T120Channel::OnReceivedPDU | ( | const H245_OpenLogicalChannel & | pdu,
|  | 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 makes sure the parameters are compatible and passes on the PDU to the rtp session.

Parameters:

  pdu | Open PDU
  errorCode | Error code on failure

Reimplemented from H323DataChannel.

virtual PBoolean H323_T120Channel::OnSendingPDU | ( | H245_OpenLogicalChannel & | openPDU | ) | const

virtual

Fill out the OpenLogicalChannel PDU for the particular channel type.

Parameters:

  openPDU | Open PDU to send.

Reimplemented from H323DataChannel.

virtual void H323_T120Channel::OnSendOpenAck | ( | const H245_OpenLogicalChannel & | open,
|  | H245_OpenLogicalChannelAck & | ack
| ) |  | const

virtual

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

Parameters:

  open | Open PDU
  ack | Acknowledgement PDU

Reimplemented from H323DataChannel.

virtual void H323_T120Channel::Receive | ( |  | ) |

virtual

Handle channel data reception.

       This is called by the thread started by the Start() function and is
       typically a loop reading  from the transport and handling PDU's.

       The default behaviour here is to call HandleChannel()

virtual void H323_T120Channel::Transmit | ( |  | ) |

virtual

Handle channel data transmission.

       This is called by the thread started by the Start() function and is
       typically a loop reading from the codec and writing to the transport
       (eg an RTP_session).

       The default behaviour here is to call HandleChannel()

## Field Documentation

OpalT120Protocol* H323_T120Channel::t120handler

protected

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

- h323t120.h