From: Colin Guthrie <gmane@colin.guthr.ie>
To: alsa-devel@alsa-project.org
Subject: Re: User-space control elements in ext PCM plugin
Date: Wed, 07 Apr 2010 12:32:59 +0100 [thread overview]
Message-ID: <hphqhb$839$1@dough.gmane.org> (raw)
In-Reply-To: <20100407100104.41190@gmx.net>
'Twas brillig, and Marcus Weigelt at 07/04/10 11:01 did gyre and gimble:
> Hi,
>
> I´m having an external PCM plugin that should do some processing on
> the audio. That part works fine. Now I´d like to have some way to
> modify the way to give some parameters to the plugin to tell it how
> the processing is done (eg. set delay time, pan, attack time, ...).
> I´ve searched the web for days and hours, but could not really find
> something. On the alsa mailing list there was a similiar question
> three years ago, and the answer was, that one could create user-space
> control elements in the plugin. How is that done? I could not find
> examples or good documentation about it. Did I miss something out?
> Can anyone give me a hint, maybe a link to some docs about it or
> source of a PCM plugin creating/using user space control elements?
> Thanks a lot.
Try looking at the PulseAudio plugin. It presents userspace sliders to
control the volume. If I've not misunderstood your request this should
do what you need.
Col
--
Colin Guthrie
gmane(at)colin.guthr.ie
http://colin.guthr.ie/
Day Job:
Tribalogic Limited [http://www.tribalogic.net/]
Open Source:
Mandriva Linux Contributor [http://www.mandriva.com/]
PulseAudio Hacker [http://www.pulseaudio.org/]
Trac Hacker [http://trac.edgewall.org/]
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
next prev parent reply other threads:[~2010-04-07 11:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-07 10:01 User-space control elements in ext PCM plugin Marcus Weigelt
2010-04-07 11:32 ` Colin Guthrie [this message]
2010-04-07 11:54 ` Marcus Weigelt
2010-04-07 11:58 ` Jaroslav Kysela
2010-04-07 12:22 ` Marcus Weigelt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='hphqhb$839$1@dough.gmane.org' \
--to=gmane@colin.guthr.ie \
--cc=alsa-devel@alsa-project.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).