Re: [ALSA - lib 0000154]: Master volume only controls front output (emu10k1)

Re: [ALSA - lib 0000154]: Master volume only controls front output (emu10k1)

[Adam K Kirchhoff]

bugtrack@alsa-project.org wrote:

>
>----------------------------------------------------------------------
> rlrevell - 05-20-05 22:05 
>----------------------------------------------------------------------
>Sorry, I don't have time to work on this.  Please bug the ALSA developers
>to get the abstract mixer layer finished.
>
>  
>

Hey developers, what's up with the abstract mixer layer? :-)

Adam



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Re: [ALSA - lib 0000154]: Master volume only controls front output (emu10k1)

[Adam K Kirchhoff]

Adam K Kirchhoff wrote:

> bugtrack@alsa-project.org wrote:
>
>>
>> ----------------------------------------------------------------------
>> rlrevell - 05-20-05 22:05 
>> ----------------------------------------------------------------------
>> Sorry, I don't have time to work on this.  Please bug the ALSA 
>> developers
>> to get the abstract mixer layer finished.
>>
>>  
>>
>
> Hey developers, what's up with the abstract mixer layer? :-)
>
> Adam
>
>

Anyone?

Adam



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Re: Re: [ALSA - lib 0000154]: Master volume only controls front output (emu10k1)

[Jaroslav Kysela]

On Fri, 27 May 2005, Adam K Kirchhoff wrote:

> Adam K Kirchhoff wrote:
> 
> > bugtrack@alsa-project.org wrote:
> >
> >>
> >> ----------------------------------------------------------------------
> >> rlrevell - 05-20-05 22:05 
> >> ----------------------------------------------------------------------
> >> Sorry, I don't have time to work on this.  Please bug the ALSA 
> >> developers
> >> to get the abstract mixer layer finished.
> >>
> >>  
> >>
> >
> > Hey developers, what's up with the abstract mixer layer? :-)
> >
> > Adam
> >
> >
> 
> Anyone?

I am working on it, but also doing zillions of other things. The actual 
status is that the virtual mixer can be created inside the lisp 
interpreter. I am looking for a clever code design to map the hardware 
controls with minimal lisp code to abstract ones.... I need something like 
an object model inside lisp (object == mixer element).

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SUSE Labs


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Re: Re: [ALSA - lib 0000154]: Master volume only controls front output (emu10k1)

[Giuliano Pochini]

On Fri, 27 May 2005, Jaroslav Kysela wrote:

> > > Hey developers, what's up with the abstract mixer layer? :-)
> > >
> >
> > Anyone?
>
> I am working on it, but also doing zillions of other things. The actual
> status is that the virtual mixer can be created inside the lisp
> interpreter. I am looking for a clever code design to map the hardware
> controls with minimal lisp code to abstract ones.... I need something like
> an object model inside lisp (object == mixer element).

I was thinking about it, too. I'm not sure the lisp thing is the right
way. If we want it to be generic enough we have to make a quite big part
of the API available to the lisp interpreter. It would make the interface
quite difficult to use and lisp doesn't make things simpler.
I wonder if, maybe, it is simpler to write a loadable plugin interface and
write the plugins in C as usual. A plugin is fast (no need to be
interpreted), it's about as complex as a lisp program (same API) and it
can be added without recompiling libasound (just like a lisp script) and
no need to learn lisp :)


--
Giuliano.


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Re: Re: [ALSA - lib 0000154]: Master volume only controls front output (emu10k1)

[Takashi Iwai]

At Fri, 27 May 2005 16:43:18 +0200 (CEST),
Giuliano Pochini wrote:
> 
> On Fri, 27 May 2005, Jaroslav Kysela wrote:
> 
> > > > Hey developers, what's up with the abstract mixer layer? :-)
> > > >
> > >
> > > Anyone?
> >
> > I am working on it, but also doing zillions of other things. The actual
> > status is that the virtual mixer can be created inside the lisp
> > interpreter. I am looking for a clever code design to map the hardware
> > controls with minimal lisp code to abstract ones.... I need something like
> > an object model inside lisp (object == mixer element).
> 
> I was thinking about it, too. I'm not sure the lisp thing is the right
> way. If we want it to be generic enough we have to make a quite big part
> of the API available to the lisp interpreter. It would make the interface
> quite difficult to use and lisp doesn't make things simpler.
> I wonder if, maybe, it is simpler to write a loadable plugin interface and
> write the plugins in C as usual. A plugin is fast (no need to be
> interpreted), it's about as complex as a lisp program (same API) and it
> can be added without recompiling libasound (just like a lisp script) and
> no need to learn lisp :)

Ah, that's what I thought of, too.  In most cases, what we need are:

- create a new user-defined control
- bind several controls to a single one
- convert/correct the different volume ranges

and they can be implemented relatively easily.  We have already the
config-tree parser code, so if the static configuration suffices, the
plugin would work enough.

The only problem of alsa-lib plugin is, again, the OSS emulation in
kernel...


Takashi


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