[Freeswitch-users] Replace One Session with Another

[Colin Morelli]

Hey Stanislav,

Thanks for the reply.

mod_conference is actually what I'm using now to accomplish this. I drop C
into the conference with A + B, along with an api_on_answer=uuid_kill
${a_uuid}. It works great, and actually doesn't notable impact CPU usage. I
assume this is because of FS' default behavior of only mixing audio for
members that are actively talking (maybe?) - so a good chunk of the time in
a 2 person conference it's only "mixing" one person's audio. In any case,
CPU usage is *very* similar in my configuration with either bridge or
conference, and any potentially small additional CPU usage is worth it for
the features conferencing provides in my opinion.

Anyway, the problem is that none of this works when there's no bridged
call. For example, I may have a channel that's currently listening to an
audio file being played by playback in a dialplan. There is no B channel at
all to bridge to, but I still want to be able to replace A with C (and
start sending the playback to session C instead). This is where my current
approach falls apart.

Best,
Colin

On Mon, Aug 8, 2016 at 10:53 AM Stanislav Sinyagin <ssinyagin at gmail.com>
wrote:

> I think it's doable via ESL, but needs testing.
>
> For example, the B's leg goes to park(), and then you hangup A and
> bridge the C's session to B. Then you can also copy important
> variables between channels via uuid_getvar and uuid_setvar.
>
> Also mod_conference might be of help, although it would put extra load
> on the CPU.
>
>
>
>
> On Mon, Aug 8, 2016 at 4:35 PM, Colin Morelli <colin.morelli at gmail.com>
> wrote:
> > Hey all,
> >
> > I asked this question a little while back and didn't get a response but I
> > worked around the issue for a while so I had never followed up. Now I'm
> > facing some other issues and would like to see if there's an answer to
> this
> > out there (or if it needs to be built).
> >
> > I'm looking to get behavior like the "pickup" channel, but at any point
> > during a call. Say I have channel A on a call with channel B. Channel C
> > calls, and I want it to take the place of A such that C is now talking
> to B.
> > In this particular case, intercept could work, but I have two issues with
> > that:
> >
> > 1. I would like to copy all channel vars from A to C
> > 2. I would like to be able to do the same thing at any point during a
> call.
> > Even if A is not currently bridged to another endpoint. As I understand,
> > intercept connects you with an existing call, it doesn't replace
> anything.
> > So logically it would only work when there's another endpoint to bridge
> you
> > to.
> >
> > Essentially, I want to swap sessions. Have everything that A is doing
> > replaced with C, and drop A. This actually appears to be what the pickup
> > channel does (I have noticed all channel vars are copied), but pickup
> only
> > works during bridging.
> >
> > Is this possible to do?
> >
> > Best,
> > Colin
> >
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