[pjsip] conference port buffers not flushed?

[Klaus Kuehnhammer]

hi,

i've run into the following problem (on v1.0.1, linux, audio path: 12  
ch alsa device <-> scomb <-> conf bridge; no VAD; G711/alaw):

* make a sip call from another pjsua instance, connect an audio in  
port to the call's port
* play a sine wave into the corresponding line in
* things are fine so far, the other side of the call hears the tone
* disconnect the ports in the conf bridge
* turn off the sine generator, wait a few seconds
* re-connect the conf bridge ports
* other side hears a short burst of the sine wave, and then silence

analyzing the traffic w/ethereal shows that the problem is on the  
sender side, the sine wave is there in the packets that go out after  
the ports are reconneced.

it looks like some old samples get stuck somewhere in the chain of  
buffers, and are played out once the port gets re-connected.

is this a known issue? any ideas where this most likely happens?

thanks a lot for any help,
Klaus