Dialogic Global Call IP Benutzerhandbuch

543

Dialogic Corporation

basic capability information

typedef struct
{
    int                     capability;
    int                     type;
    int                     direction;
    int                     payload_type;
    IP_CAPABILITY_UNION     extra;
    char                    rfu[0x10];
} IP_CAPABILITY;

„ Description

The IP_CAPABILITY data structure provides basic media capability information, including the 
capability or codec identification and the direction. The IP_CAPABILITY structure is used as the 
value of one or more parameter element in a GC_PARM_BLK structure when communicating 
coder capabilities between endpoints. 

The IP_CAPABILITY data structure is not intended to provide all the flexibility of the H.245 
terminal capability structure or SDP, but provides a first level of useful information in addition to 
the capability or codec identifier.

„ Field Descriptions

The fields of the IP_CAPABILITY data structure are described as follows:

capability 

The IP Media capability for this structure. Possible values are:

GCCAP_AUDIO_g711Alaw64k

GCCAP_AUDIO_g711Ulaw64k

GCCAP_AUDIO_g7231_5_3k

GCCAP_AUDIO_g7231_6_3k

GCCAP_AUDIO_g726_16k

GCCAP_AUDIO_g726_24k

GCCAP_AUDIO_g726_32k

GCCAP_AUDIO_g726_40k 

GCCAP_AUDIO_g729AnnexA

GCCAP_AUDIO_g729AnnexAwAnnexB

GCCAP_AUDIO_NO_AUDIO

GCCAP_DATA_t38UDPFax

GCCAP_dontCare

type 

The category of capability specified in this structure. Indicates which member of the 
IP_CAPABILITY_UNION union is being used in the extra field. Possible values are:

GCCAPTYPE_AUDIO – Audio

GCCAPTYPE_RDATA – Data

Note: Video is not supported in this data structure because video requires the use of the 

3PCC operating mode, which does not support this structure.