class H323NonStandardAudioCapability

This class describes the interface to a non-standard audio codec used to transfer data via the logical channels opened and managed by the H323 control channel.

Inheritance:


Public Methods

[more] Construction
[more] Overrides from class PObject
[more] Identification functions
[more] Protocol manipulation


Inherited from H323AudioCapability:

Public Methods

Operations


Inherited from H323RealTimeCapability:


Inherited from H323Capability:

Public Methods

Member variable access

Protected Fields

oCapabilityDirection capabilityDirection


Inherited from H323NonStandardCapabilityInfo:

Public Methods

ovirtual BOOL OnSendingPDU( PBYTEArray & data ) const
ovirtual BOOL OnReceivedPDU( const PBYTEArray & data )


Documentation

This class describes the interface to a non-standard audio codec used to transfer data via the logical channels opened and managed by the H323 control channel.

An application may create a descendent off this class and override functions as required for descibing the codec.

o Construction

o H323NonStandardAudioCapability( unsigned maxPacketSize, unsigned desiredPacketSize, H323EndPoint & endpoint, const BYTE* dataBlock = NULL, PINDEX dataSize = 0, PINDEX comparisonOffset = 0, PINDEX comparisonLength = P_MAX_INDEX )
Create a new set of information about a non-standard codec.
Parameters:
maxPacketSize - Maximum size of an audio packet in frames
desiredPacketSize - Desired transmit size of an audio packet in frames
endpoint - Endpoint to get t35 information
dataBlock - Non-Standard data for codec type
dataSize - Size of dataBlock. If 0 and dataBlock != NULL use strlen(dataBlock)
comparisonOffset - Offset into dataBlock to compare
comparisonLength - Length of bytes to compare

o H323NonStandardAudioCapability( unsigned maxPacketSize, unsigned desiredPacketSize, const PString & oid, const BYTE* dataBlock = NULL, PINDEX dataSize = 0, PINDEX comparisonOffset = 0, PINDEX comparisonLength = P_MAX_INDEX )
Create a new set of information about a non-standard codec.
Parameters:
maxPacketSize - Maximum size of an audio packet in frames
desiredPacketSize - Desired transmit size of an audio packet in frames
oid - OID for indentification of codec
dataBlock - Non-Standard data for codec type
dataSize - Size of dataBlock. If 0 and dataBlock != NULL use strlen(dataBlock)
comparisonOffset - Offset into dataBlock to compare
comparisonLength - Length of bytes to compare

o H323NonStandardAudioCapability( unsigned maxPacketSize, unsigned desiredPacketSize, BYTE country, BYTE extension, WORD maufacturer, const BYTE* dataBlock = NULL, PINDEX dataSize = 0, PINDEX comparisonOffset = 0, PINDEX comparisonLength = P_MAX_INDEX )
Create a new set of information about a non-standard codec.
Parameters:
maxPacketSize - Maximum size of an audio packet in frames
desiredPacketSize - Desired transmit size of an audio packet in frames
country - t35 information
extension - t35 information
maufacturer - t35 information
dataBlock - Non-Standard data for codec type
dataSize - Size of dataBlock. If 0 and dataBlock != NULL use strlen(dataBlock)
comparisonOffset - Offset into dataBlock to compare
comparisonLength - Length of bytes to compare

o Overrides from class PObject

oComparison Compare(const PObject & obj) const
Compare two capability instances. This compares the main and sub-types of the capability.

o Identification functions

ovirtual unsigned GetSubType() const
Get the sub-type of the capability. This is a code dependent on the main type of the capability.

This returns H245_AudioCapability::e_nonStandard.

o Protocol manipulation

ovirtual BOOL OnSendingPDU( H245_AudioCapability & pdu, unsigned packetSize ) const
This function is called whenever and outgoing TerminalCapabilitySet or OpenLogicalChannel PDU is being constructed for the control channel. It allows the capability to set the PDU fields from information in members specific to the class.

The default behaviour calls H323NonStandardCapabilityinfo::OnSendingPDU() to handle the PDU.

Parameters:
pdu - PDU to set information on
packetSize - Packet size to use in capability

ovirtual BOOL OnSendingPDU( H245_AudioMode & pdu ) const
This function is called whenever and outgoing RequestMode PDU is being constructed for the control channel. It allows the capability to set the PDU fields from information in members specific to the class.

The default behaviour calls H323NonStandardCapabilityinfo::OnSendingPDU() to handle the PDU.

Parameters:
pdu - PDU to set information on

ovirtual BOOL OnReceivedPDU( const H245_AudioCapability & pdu, unsigned & packetSize )
This function is called whenever and incoming TerminalCapabilitySet or OpenLogicalChannel PDU has been used to construct the control channel. It allows the capability to set from the PDU fields, information in members specific to the class.

The default behaviour calls H323NonStandardCapabilityinfo::OnReceivedPDU() to handle the provided PDU.

Parameters:
pdu - PDU to get information from
packetSize - Packet size to use in capability

ovirtual BOOL IsNonStandardMatch( const H245_NonStandardParameter & param ) const
Compare the nonStandardData part of the capability, if applicable.
Parameters:
param - Non standard field in PDU received


Direct child classes:
MicrosoftNonStandardAudioCapability
H323_LPC10Capability
H323_CiscoG7231aLIDCapability

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