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Main • Chanattach

chan.attach

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.

Resource identifier parameters (each is optional):

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

Optional parameters:

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

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