[asterisk-dev] ChanSpy / ConfBridge limitation

[Mark Murawski]

Howdy -dev,

Looking for a starting point to investigate this issue:

Using the following AEL (and Running straight-dialplan results in the 
same issue)

context services {
   2802 => {
     Answer();
     Set(GLOBAL(foo)=${CHANNEL});
     ConfBridge(Agent-PJSIP/2802);
   }

   9000 => {
     Answer();
     ChanSpy(${foo},qoSE);
   }
}

PJSIP/2802-00003b18 -> ConfBridge("Agent-PJSIP/2802")
<CBAnn/Agent-PJSIP/2802-00000075;2> joined 'softmix' base-bridge <56974564-b175-4b6a-93fc-fe4753082213>
<PJSIP/2802-00003b18> joined 'softmix' base-bridge <56974564-b175-4b6a-93fc-fe4753082213>

PJSIP/trunk-bob-00003b19 -> ChanSpy("PJSIP/2802-00003b18,qoSE")
Spying on channel PJSIP/2802-00003b18
Attaching spy channel PJSIP/trunk-bob-00003b19 to PJSIP/2802-00003b18


Issue:
   No audio is flowing from Spied-on PJSIP/2802-00003b18 to the spy-er PJSIP/trunk-bob-00003b19


If for example, you change 2802 to the following:

   2802 => {
     Answer();
     Set(GLOBAL(foo)=${CHANNEL});
     Dial(PJSIP/2803);
   }


Wait for the call to connect/answer
   PJSIP/2802-00003b20 -> PJSIP/2803-00003b5d (callee answered)

And then run the same ChanSpy with options qoSE, resulting in:
   PJSIP/trunk-bob-00003b97 -> ChanSpy("PJSIP/2802-00003b20,qoSE")
   Attaching spy channel PJSIP/trunk-bob-00003b97 to PJSIP/2802-00003b20


Result:
   Audio IS flowing from spied-on PJSIP/2802-00003b20 to the spy-er on PJSIP/trunk-bob-00003b97



One might say: Well, ChanSpy/ConfBridge don't mix... but then if you do the following... this DOES work:
   
context services {
   2802 => {
     Answer();
     Set(GLOBAL(foo)=${CHANNEL});
     ConfBridge(Agent-PJSIP/2802);
   }

   9000 => {
     Answer();
     ChanSpy(${foo},qwSE);
   }
}

Changing the option from 'o' to 'w', allows you to whisper to PJSIP/2802

----


Goal:
   Extract out an individual speaker's audio that's going into a ConfBridge
   (Cannot join the bridge as a member, because then you're getting all participants audio)


Summary:
   1) You can whisper to a channel that joined a ConfBridge
   2) You cannot listen to the audio from a channel that joined a ConfBridge


Also:
   I tried ChanSpy()'ing into both CBAnn/...;1  and CBAnn/...;2 and I could not get audio from here either


Is this a bug or a limitation/missing-feature?


What would be a good place to look into for resolving #2 ?


Thanks!


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