[Freeswitch-users] Choppy sound with PCMU
erandr-junk at usa.net
Wed Dec 2 19:47:42 PST 2009
OK, I'm slow. It's music-on-hold, and it's playing non-stop like that timer
thread. Even when there are no calls. Why?
> 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 interval.
> 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
>>> 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
>>> using and we set our timer
>>> to the wrong speed.
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