[Freeswitch-users] Choppy sound with PCMU

eaf erandr-junk at usa.net
Wed Dec 2 19:35:39 PST 2009

Oh, looks like the timers are also used for streaming local data in
read_stream_thread(). Due to this there is always one timer active with 20ms

But wait a sec, why is freeswitch periodically trying to stream
/opt/freeswitch/sounds/music/8000/ponce-preludio-in-e-major.wav somewhere?
Every minute or so? Did I misconfigure it?

eaf wrote:
> Say, what if that thread is made to suspend on a condition variable in
> case if there are no timers registered in TIMER_MATRIX? Then, if some
> other thread comes up and adds its timer into the matrix, it could wake up
> the timer thread and enjoy accurate timing as needed, on demand? And
> in-between the calls, when there is no RTP or IVR, it will all go silent?
> I mean, sitting on a wait queue in the kernel is way better than go back
> and forth incrementing counters that nobody even needs at the moment?
> Anthony Minessale-2 wrote:
>> idle is a 4 letter word to a realtime application.
>> The core keeps a single high-priority thread to keep 1ms timing and
>> expands
>> that broadcasting
>> to hundreds or thousand of threads who need accurate timing.
>> Your choppy audio is caused by linksys lying about the packet len that
>> it's
>> using and we set our timer
>> to the wrong speed.

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