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ACN: res_pjsip endpoint options

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This commit adds the endpoint options required to control
Advanced Codec Negotiation.

incoming_offer_codec_prefs
outgoing_offer_codec_prefs
incoming_answer_codec_prefs
outgoing_answer_codec_prefs

The documentation may need tweaking and some additional edits
added, especially for the "answer" prefs.  That'll be handled
when things finalize.

This commit is safe to merge as it doens't alter any existing
functionality nor does it alter the previous codec negotiation
work which may now be obsolete.

Change-Id: I920ba925d7dd36430dfd2ebd9d82d23f123d0e11
This commit is contained in:
George Joseph
2020-07-06 08:56:44 -06:00
parent 81b5e4a73f
commit 2d22e34206
5 changed files with 434 additions and 0 deletions
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48
configs/samples/pjsip.conf.sample
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@@ -839,6 +839,54 @@
; at the end of the joint list.
; remote_first - Include only the first codec in
; the remote list.
;incoming_offer_codec_prefs=; This is a string that describes how the codecs
; specified on an incoming SDP offer (pending) are
; reconciled with the codecs specified on an endpoint
; (configured) before being sent to the Asterisk core.
; The string actually specifies 4 name:value pair
; parameters separated by commas. Whitespace is
; ignored and they may be specified in any order.
; prefer: <pending | configured>,
; operation: <intersect | only_preferred
; | only_nonpreferred>,
; keep: <first | all>,
; transcode: <allow | prevent>
;outgoing_offer_codec_prefs=; This is a string that describes how the codecs
; specified in the topology that comes from the
; Asterisk core (pending) are reconciled with the
; codecs specified on an endpoint (configured)
; when sending an SDP offer.
; The string actually specifies 4 name:value pair
; parameters separated by commas. Whitespace is
; ignored and they may be specified in any order.
; prefer: <pending | configured>,
; operation: <intersect | union
; | only_preferred | only_nonpreferred>,
; keep: <first | all>,
; transcode: <allow | prevent>
;incoming_answer_codec_prefs=; This is a string that describes how the codecs
; specified in an incoming SDP answer (pending)
; are reconciled with the codecs specified on an
; endpoint (configured) when receiving an SDP
; answer.
; The string actually specifies 4 name:value pair
; parameters separated by commas. Whitespace is
; ignored and they may be specified in any order.
; prefer: <pending | configured>,
; operation: <intersect | union
; | only_preferred | only_nonpreferred>,
; keep: <first | all>
;outgoing_answer_codec_prefs=; This is a string that describes how the codecs
; that come from the core (pending) are reconciled
; with the codecs specified on an endpoint
; (configured) when sending an SDP answer.
; The string actually specifies 4 name:value pair
; parameters separated by commas. Whitespace is
; ignored and they may be specified in any order.
; prefer: <pending | configured>,
; operation: <intersect | union
; | only_preferred | only_nonpreferred>,
; keep: <first | all>
;preferred_codec_only=no ; Respond to a SIP invite with the single most
; preferred codec rather than advertising all joint
; codec capabilities. This limits the other side's