Hi Colin, thanks for your answer. In general the pulse plugin does more or less what I want - present controls in userspace, right. But the PulsePlugin actually consists of two plugins, a PCM plugin (pcm_pulse.c) and control plugin (ctl_pulse.c). As far as I understand, the control events/messages from the user space sliders are directed to the pulse audio server via the ctl_plugin. My question is actually, how to make use of them directly in the pcm plugin? As I told, a similiar request was done three years ago: http://article.gmane.org/gmane.linux.alsa.devel/50181 That´s where I got the idea of creating the user-space control elements directly inside of the PCM plugin, or did I get it wrong? Marcus -------- Original-Nachricht -------- > Datum: Wed, 07 Apr 2010 12:32:59 +0100 > Von: Colin Guthrie <gmane@xxxxxxxxxxxxxx> > An: alsa-devel@xxxxxxxxxxxxxxxx > Betreff: Re: User-space control elements in ext PCM plugin > '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@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
