Hello,
For some reason the company mail server is holding back the
patches, doing some checking or what not... I sent the
patches to the mailing list last Thursday. This happened
to me once before, but I didn't remember to take it into
account...
Anyway if they are not appearing soon to the list, I will
resend them from home.
br,
Jaska
Quoting "Flavio Ceolin" <[email protected]>:
Hi folks,
Tanu Kaskinen <[email protected]> writes:
Hi Tanu,
On Fri, 2012-07-20 at 17:32 -0300, Flavio Ceolin wrote:
Tanu Kaskinen <[email protected]> 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).
It's really good to heard it.
>> 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.
I want make possible an application associate an action with an audio
effect. For example, a dialog pops up and you want to keep that sample
pattern playing but you want to "fade it out" so its really quiet. So over
2 seconds you fade it out. Another example would be you shift balance to
the left or right according with the mobile phone (or whatever you want)
position.
Regards,
Flavio Ceolin
Trying to continue this matter, the idea of make this funcionality so
generic is facilitating for other applications. I believe several
applications (like media players) that use PA are implementing it's own
"basic" effects as crossfading or fade-in/out for pause. I think make it
easier is a goal.
Other benefit of supporting it, is make possible the ducking[1] effect on
audio streams, as we've discussed on irc, a good example for this is the
sms case (when a sms comes the others samples should fade-out).
Another point to have it is the sample cache. If the sample is already
in the cache and the application should do fade-in/out or change the
balance, the only way to do that is re-uploading the sample.
So guys, what you think about, it worth to implement ? If not, what you
think should be changed ? I'm open to discuss it.
[1] http://en.wikipedia.org/wiki/Ducking
Regards,
Flavio Ceolin
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