Prosody RTP processing: API: sm_vmptx_config_codec_g722_1

Prototype Definition

int sm_vmptx_config_codec_g722_1(struct sm_vmptx_codec_g722_1_parms *codecp)

Parameters

*codecp
a structure of the following type: 
typedef struct sm_vmptx_codec_g722_1_parms {
	tSMVMPtxId vmptx;					/* in */
	tSM_INT payload_type;					/* in */
	tSM_INT bitrate;					/* in */
	tSM_INT frames_per_packet;				/* in */
} SM_VMPTX_CODEC_G722_1_PARMS;

Description

Configures a VMP[tx] to use G.722.1, licensed from Polycom®, wideband codec for encoding data, as defined in IETF RFC 3047.

This requires the module g722-1 to have been downloaded.

Fields

vmptx
The VMP[tx] to which to add this codec
payload_type
The payload type identifer to use with this codec (see IETF RFC 3550 section 13). Supplying a value of -1 will remove any payload type configuration from the codec preventing its use.
bitrate
Bitrate of the encoded data. Must be 24000 or 32000 (the ultrawideband bit rates specified in G.722.1 Annex C are not supported).
frames_per_packet
The number of frames to send per packet. This value is normally one, which encodes 20 milliseconds per packet, but larger values could be used, to reduce the packet overhead at the expense of extra delay.

Returns

0 if call completed successfully, otherwise a standard error such as:

This function is part of the Prosody RTP processing API.