Re: Newbie questions about web audio working group specs

Welcome!

On Tue, Jan 31, 2012 at 7:04 AM, Samuel Goldszmidt <
samuel.goldszmidt@ircam.fr> wrote:

>  First, you talk about *continuous real-time* media. At Ircam, we work on
> these questions, and, may be the *real time* word, is to restrictive, or
> may be we don't talk about the same thing. Sometimes, audio
> processing/treatments can't be done in real time:
>

I just meant that there's a time-varying signal that (in the steady state)
we want to process at the same rate as real time; e.g. we want to process
one second of data every second. And we want to be able to keep doing that
reliably (no dropouts), and with low latency (when possible). But I was
just using the phrase "continuous real-time" descriptively; I didn't intend
to refer to any formal definition of the term.

My demos include an example where the effect requires a very long delay ---
although not indefinitely long, as in your example.
http://people.mozilla.org/~roc/stream-demos/video-with-extra-track-and-effect.html
(get a browser build from here:
http://robert.ocallahan.org/2012/01/mediastreams-processing-demos.html)

(One last question: for mediastream extensions, as for effects that would
> be in level 2 specification, wouldn't it be better to have an overall
> createProcessor method for both workers and non-workers processor ?)
>

I suppose we could rename createWorkerProcessor to createProcessor and use
overloading to resolve them. It probably doesn't matter much.

Finally, correct me if I'm wrong, the main difference I have seen between
> Web Audio API by Chris Rogers and MediaStream Procession API by Robert
> O'Callahan is that in the second, all media processing are more linked with
> DOM objects (media elements in this case) than in the first one (although
> the graph of the first API seems to me much more easy to understand at
> first time), which make sense in my point of view.
>

There are a number of other differences. I mentioned some of them here:
http://robert.ocallahan.org/2012/01/mediastreams-processing-demos.html

Rob
-- 
"If we claim to be without sin, we deceive ourselves and the truth is not
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sinned, we make him out to be a liar and his word is not in us." [1 John
1:8-10]