[asterisk-dev] Manager event for early media

[Olle E. Johansson]

16 apr 2011 kl. 14.41 skrev Russell Bryant:

> 
> ----- Original Message -----
>> 15 apr 2011 kl. 16.37 skrev Russell Bryant:
>> 
>>> Early media is a generic enough telephony concept that I do believe
>>> that it makes sense to capture it on ast_channel. I can't think of a
>>> better place for it than channel state.
> 
>> Before making a decision here, I want to check how ISDN handles this -
>> if it's a call state or just an attribute. In SIP it's not a call
>> state and would mess stuff up. It is more of a media state. Do we have
>> any media in the early states of the call or not? The same goes for
>> MUTE, HOLD. They all indicate the state of the media stream. Maybe we
>> should implement a media state in the channel structure.
> 
> That's an interesting idea.  Would it have to be a state per media stream (audio, video, text)?  We have a documented design proposal [1] for handling multiple media streams of each type, as well.  We could have that to deal with in the next year.  This is getting more and more complicated.
> 
> I think it's worth re-asking ourselves, could this just be a new manager event?  That would be so easy to add if it's sufficient.  Add a Progress event (or some other name...) for AST_CONTROL_PROGRESS in ast_read(). 
> 
> [1] https://wiki.asterisk.org/wiki/display/AST/Media+Architecture+Proposal

I think I'll just go ahead and fake one without adding media states. When we have a new media architecture, we just need to make sure we have some media states that could be used for this.

/O