Chan.attach

Revision as of 11:12, 8 October 2012

This special message is used by a channel to request to insert a data source or consumer (or both) provided by another module.

Typically the Tone Generator, Wave File and RTP modules can provide data nodes to other modules.

This message must be sent synchronously.

source

the data source the sender module wants to attach

consumer

the consumer the sender module wants to attach; this can be used at the same time with source

override

the data source that is to be temporarily connected to the sender's consumer; the intended usage is for local announcements and inband tone injection

sniffer

a data consumer to be attached as sniffer (supplementary consumer) instead of replacing the consumer

replace

a data source to temporarily replace the sender's source

notify

the id of the target that should recieve the chan.notify message that is send when the source or consumer reach end of data

maxlen

the maximum number of octets that should be transferred; this parameter is currently used only by the wave consumer

autorepeat

set to true to indicate the desire for data sources to repeat indefinitely; this parameter is currently used only by the wave source

single

boolean indication that the message contains a single resource identifier so the first matching handler can stop the message flow

rate

desired sample rate of the attached data node(s), default 8000Hz; not all modules support sample rate setting