[Freeswitch-dev] Usage of some core channel functions

[cmrienzo at gmail.com]

Channel variables are strings that can be set/get just about everywhere in FreeSWITCH.  Often used in the dialplan to tweak behavior of a dialplan app. 

Private channel data is used by the module C code to store a pointer to some data that is referenced by a name.  This data would exist in the scope of the channel that it is set on.   One typical example is to store a media bug as private data so that it can be later removed from a session.




On Apr 17, 2012, at 12:14, "Mariusz Czulada" <manieq at wp.eu> wrote:

> Hi all,
> 
> While trying to add some features to mod_conference I found two functions for access channel data:
> 
> * switch_channel_get_variable(channel, "conference_controls");
> 
> This one is clear, but also
> 
> * switch_channel_get_private(channel, "_conference_autocall_list_");
> 
> Can somebody clarify to me (and maybe to others) what is the purpose of this mechanism? What kind of channel data are generally manipulated this way? Are there useable/settable from application level (dialplan or scripts)?
> 
> Regards,
> 
> Mariusz
> 
> 
> 
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