[pulseaudio-discuss] Support for audio envelopes

[Tanu Kaskinen]

On Fri, 2012-07-20 at 17:32 -0300, Flavio Ceolin wrote:
> Tanu Kaskinen <tanuk at iki.fi> writes:
> > There were problems with the code. I don't remember what exactly was
> > broken, though. But at least I didn't like the concurrency handling: I
> > really dislike doing inter-thread communication by using shared
> > variables. Instead, message passing should be used, in my opinion.
> 
> I'll investigate how to solve it. Btw, do you think it's better start
> from the scratch or it's ok start from this code ?

I really don't know. I'm not familiar enough with the code to know how
much of it needs rewriting.

I know that Jaska Uimonen has been working with volume envelopes too,
and asked him yesterday about the status. He said he will post the code
to the mailing list on Monday. I haven't seen the code, but if it's
good, then it might be a good starting point too (Jaska said that it's
lacking multichannel support, so work will be needed).

> >> 2) How an application should use this code, AFAIK this code is not being
> >>    exported.
> >
> > What's your use case? If we are talking about sink volume ramping, I
> > don't see the need for a client interface at all, because it should be
> > done automatically by the server.
> 
> Basically I want to set an envelope which apply a filter changing the
> sound balance and/or the volume, it's easier demonstrating an idea of an
> envelope:

But what's the use case (user-visible feature) that you're interested
in? My answer to the "how an application should use this code" depends
on the use case.

-- 
Tanu