[pulseaudio-discuss] Progress since PulseConf

[Jaska Uimonen]

Hello All,

...and sorry for late response.

Me and Janos have been very busy with other
stuff, but we are now dedicating next couple of
weeks to get something done on the routing front.

We'll continue from where Janos stopped last time
and try to get something feasible out of that.

br,
Jaska


Quoting David Henningsson <david.henningsson at canonical.com>:

> Hi everyone,
>
> It's been a few months since some of us met in Copenhagen, and since  
> then we've got a new version of PulseAudio out the door. So I think  
> it's time to look back and see if there's any progress on any of  
> these issues, and if not, how we can refuel and get started again :-)
>
> Based on Arun's PulseConf notes [1]:
>
> === Patch review capacity ===
>
>  * So far, I haven't seen one brought up yet. It looks like we're  
> doing well right now with Tanu doing the bulk of the review work,  
> but it wouldn't hurt if we could share the load a bit better. Colin,  
> as you agreed to setting up the first one, what do you think?
>
> === Routing infrastructure ===
>
>  * It looks like there was some progress, but then work seems to  
> have stalled with the last commit being three months ago [2].  
> Janos/Jaska, how are things going right now, is there something  
> digestible that we can merge into the main tree at this point?
>
> === Low latency ===
>
>  * I feel work has been a bit sporadic here.
>
>    - I once tried to track down a 10 ms+ delay in the kernel which I  
> think was in the i915 driver, and asked for help on LKML but didn't  
> get much. Maybe just doing another try here would be the right thing?
>
>    - Arun worked a little on changing the buffering refill values to  
> better suit low latency scenarios, but I don't think anything was  
> sufficiently tested and merged. What is your experience?
>
>    - I suggested to test the maxlength parameter better, and I  
> should probably do that, but haven't got to it yet. Also, I think  
> this is somewhat related to the buffer parameters Arun was working  
> with, so maybe wait until that is merged?
>
> === Improving (laptop) surround sound ===
>
>  * No progress, and nobody who signed up for anything AFAIK?
>
> === Unified cross-distribution ALSA configuration ===
>
>  * No progress, and nobody who signed up for anything AFAIK?
>
> === Base volumes ===
>
>  * No progress, and nobody who signed up for anything AFAIK?
>
> === Devices with dynamic capabilities (HDMI) ===
>
>  * I've written some patches that read the HDMI ELD info and that  
> recently have been merged. It also required some kernel patches  
> which will be merged for kernel 3.9 (to support hotplug better).  
> This would at least enable UIs to show the monitor name, which is  
> nice. I'm hoping that Arun will write something that would take the  
> ELD formats and turn into PulseAudio's native format.
>
>  The question is whether or when to proceed with the dynamic card  
> thing. I somewhat fear regressions since Pierre's email [3]. The  
> question is if the kernel is ready to give us correct information.  
> One strategy could be to wait for GNOME et al to see if we get many  
> bugs in terms of "When I plug in my fancy monitor, GNOME says its  
> name is '!%&#&&#!#'", and perhaps proceed only if there are (almost)  
> no such bugs. What do you think?
>
> === Splitting of configuration ===
>
>  * I think we're currently waiting for Tanu to do some work on this  
> issue and come up with a more concrete proposal, is that correct?
>
> === Better drain/underrun reporting ===
>
>  * No work so far; and I can reiterate that it feels like it's quite  
> far down on the priority list. Do you agree or should I try to start  
> working on this (compared to other stuff)?
>
> === User experience ===
>
>  * No progress AFAIK. Did anybody sign up for anything in this area?
>
>
> -- 
> David Henningsson, Canonical Ltd.
> https://launchpad.net/~diwic
>
> [1] http://arunraghavan.net/2012/11/pulseconf-2012-report/
>
> [2] https://github.com/otcshare/pulseaudio/tree/routing
>
> [3]  
> http://lists.freedesktop.org/archives/pulseaudio-discuss/2013-January/015943.html