[Asterisk-Dev] SIP - how does * decide codec order of preference

[Kevin Walsh]

Rob Gagnon [rob at networkip.net] wrote:
> They are sent out based on which Codec bits are on or off.
> 
> Each codec is assigned one bit of a 32-bit integer.  That integer is
> parsed in order to produce the list in the SIP message.  Of course, doing
> it that way leaves no method for setting the order.
> 
> This is a constant topic in the list.  Maybe someone would want to recode
> that to use an ordered list?  :-)
> 
See sip_codec_choose() and ast_best_codec() in "channels/chan_sip.c".

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