[pulseaudio-discuss] PulseAudio for Embedded System
lennart at poettering.net
Mon May 28 15:42:11 PDT 2007
On Mon, 14.05.07 09:47, keith preston (keithpre at gmail.com) wrote:
> libspeex resampling patch. I have this working in certain cases. Most
> notably the embedded case, which is S16_LE audio in 1 or 2 channels. I
> haven't really followed up with the libspeex guys, but I was going to wait
> for the resampling code API to stabilize in libspeex and be released, before
> I added a patch with a dependency to it.
Awesome! This has been on my TODO list as well.
> software volume/mixing (sample-utils.c) I've been looking and thinking
> about how to rewrite this for efficiency. I found on my embedded device CPU
> Utilization for from 5% to 100% whenever I have two streams with software
> volumes. As a temporary measure for myself, my embedded platform has some
> proprietary audio mixing code I am using, but this code should be cleaned up
> a bit.
Any chance for better liboil usage?
> Audio Class Policy, this is really the big one and I'm sure you'll be
> interested in with the gsmartmix stuff. I've added the concept of audio
> class to all the internal streams in pulseaudio and have a module that
> arbitrates between streams actively preempting streams, changing volume and
> such. It is working pretty well right now. I can have my music turn down
> when sound events happen that need my attention, I can block all audio when
> a VOIP call comes in, etc...
This sounds very good. As soon has you have something useful or maybe
even mergable, please ping me. This kind of overlaps with what I have
on my TODO list. I am very happy to see that someone else is doing
this work for me ;-).
Lennart Poettering Red Hat, Inc.
lennart [at] poettering [dot] net ICQ# 11060553
http://0pointer.net/lennart/ GnuPG 0x1A015CC4
More information about the pulseaudio-discuss