[pulseaudio-discuss] [PATCH] new virtual-sink and virtual-source modules

[pl bossart]

>> module-virtual-sink is a template for the addition of PCM processing.
>> It's basically based on the LADSPA module, I use it for internal
>> experiments and will enhance it in the future.
>
> This definitely makes sense, especially when we'll eventually get the
> filtering logic I have mentioined a couple of times.

Humm, I am not sure I remember having seen anything on this 'filtering
logic'. Would you mind providing a pointer to previous posts?

> I have merged both modules to master now since they look mostly good,
> and are not invasive. I'll have a closer look soon and fix what there
> is left to fix.

Cool. Thanks in advance for your feedback.
What I am now looking at is a way to handle sinks and sources in a
more optimized manner for low-latency speech calls: it doesn't make
any sense power-wise to handle uplink and downlink paths in completely
separate threads with their own timers. You use the same latency
settings,sampling frequencies and channel-map on both paths, relying
on completely independent structures results in 2x wakeups for no good
reason. Plus if you start doing processing you need inter-thread
communication for acoustic enhancements. Maybe we could handle both
threads with the same wake-up events (a single rtpoll?), or combine
sink/source threads. I know no one cares with a 50 Wh battery, things
are different in a handheld....
- Pierre