[pulseaudio-discuss] [PATCH v2 1/6] core: add ARM NEON optimized mono-to-stereo/stereo-to-mono remapping code

[Arun Raghavan]

On Fri, 2012-07-06 at 11:29 +0200, Peter Meerwald wrote:
> Hello,
> 
> > Can you give a status update: what remains to be done before these
> > patches can be merged?
> 
> I am glad you asked; I am working on a v3 these days to address the 
> following issues:

Awesome! Looking forward to this.

> - performance degradation on Cortex-A9 / pandaboard for remap: NEON is 
> fast on Cortex-A8 but slow on A9; need to distinguish

Is this some sort of known A8 vs. A9 issue?

> - reimplement using gcc inline assemlby instead of intrinsics (similar to 
> the SBC neon code)

Whichever is easies to maintain would be best. :)

> - fix issues in test code

Hopefully we'll be able to move this to a standalone test based on
Deng's work that you might've seen.

> remap and sconv is complete, working on svolume now;
> you'll see something really-soon-now (early next week probably)
> 
> I do not plan to work on the configuration system now: an open issue is 
> runtime configuration, i.e. compile with NEON support and decide at 
> runtime if NEON is available or not -- I hope this can be addressed 
> later-on

++, makes sense.

-- Arun