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Re: ProcessedMediaStream demos

From: Jussi Kalliokoski <jussi.kalliokoski@gmail.com>
Date: Thu, 19 Jan 2012 18:27:16 +0200
Message-ID: <CAJhzemXB8-SjsV0jmnZ03_Ef14726vLuw3hEhLvjmWjCO_B_UQ@mail.gmail.com>
To: Alistair MacDonald <al@signedon.com>
Cc: robert@ocallahan.org, public-audio@w3.org
Hey Al!

Yeah, I gave it a quick shot! Looks really promising, although as Roc
mentioned in the blog post, the resampler needs to be rewritten, I'm
getting really nasty glitches (don't sound like underruns) quite often. I
made a small demo to test it out (
http://audiolibjs.org/examples/tranquilion/ [based on an older demo] ), and
the performance is quite awesome. I'm doing heaps of stuff, basically
playing multiple tracks of generated sound, FFT for a visualizer, and user
controllable parameters, but it's still relatively low CPU usage and the UI
is very responsive (as opposed to the old Audio Data API, because we are
doing audio in a different thread, and also because the latency seems much

Great job, Roc!


On Wed, Jan 18, 2012 at 6:13 PM, Alistair MacDonald <al@signedon.com> wrote:

> Hey Jussi,
> I did not get a chance to check out the builds yet, things have been
> extremely busy at the office here.
> Did you get a chance to try them out yet?
> al
> On Tue, Jan 17, 2012 at 6:13 AM, Jussi Kalliokoski <
> jussi.kalliokoski@gmail.com> wrote:
>> Great job, Roc!
>> I'll have to take a try at the builds later today, to see if I can come
>> up with something cool there. Too bad there's no Linux build, yet. ;)
>> Jussi
>> On Tue, Jan 17, 2012 at 2:18 AM, Robert O'Callahan <robert@ocallahan.org>wrote:
>>> Hi!
>>> At the linux.conf.au browser miniconf yesterday I talked about the
>>> MediaStreams Processing proposal and, more importantly, gave some live
>>> demos! (Much furious hacking was required to get the implementation into
>>> shape at the last minute :-) ) I've made available the demos, and some
>>> experimental Firefox builds that can play the demos, via this blog post:
>>> http://robert.ocallahan.org/2012/01/mediastreams-processing-demos.html
>>> Thanks,
>>> Rob
>>> --
>>> "If we claim to be without sin, we deceive ourselves and the truth is
>>> not in us. If we confess our sins, he is faithful and just and will forgive
>>> us our sins and purify us from all unrighteousness. If we claim we have not
>>> sinned, we make him out to be a liar and his word is not in us." [1 John
>>> 1:8-10]
> --
> Alistair MacDonald
> SignedOn, Inc - W3C Audio WG
> Boston, MA, (707) 701-3730
> al@signedon.com - http://signedon.com
Received on Thursday, 19 January 2012 16:27:52 UTC

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