ALSA - 3D api interaction (OpenAL?)

ALSA - 3D api interaction (OpenAL?)

[Manuel Jander]

Hi,

This may sound crazy, but i'm reverse engineering the A3d engine of the
Aureal Vortex Cards. The hardware interface is pretty simple, and i
guess that at least some filtering and reflection rendering can be done
in hardware with the information i was able to gather until now.

The hardest part in my opinion is the userland API. I looked at some A3D
examples, and i really liked that API a lot. Its just like OpenGL, but
its audio instead of light what you get. Is there any effort to
integrate 3D capabilities into the ALSA scheme ? any extended feature
IOCTL, or somewhat like that ? I only know about the creative labs
OpenAL implementation, but AFAIK, thats just a tweaked OSS driver, aand
its not designed to be used with other soundcards that are not made by
Crippled Labs. Any comments ?

Best Regards

Manuel Jander



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Re: ALSA - 3D api interaction (OpenAL?)

[Takashi Iwai]

At Mon, 01 Sep 2003 14:19:22 -0400,
Manuel Jander wrote:
> 
> Hi,
> 
> This may sound crazy, but i'm reverse engineering the A3d engine of the
> Aureal Vortex Cards. The hardware interface is pretty simple, and i
> guess that at least some filtering and reflection rendering can be done
> in hardware with the information i was able to gather until now.
> 
> The hardest part in my opinion is the userland API. I looked at some A3D
> examples, and i really liked that API a lot. Its just like OpenGL, but
> its audio instead of light what you get. Is there any effort to
> integrate 3D capabilities into the ALSA scheme ? any extended feature
> IOCTL, or somewhat like that ?

no.

> I only know about the creative labs
> OpenAL implementation, but AFAIK, thats just a tweaked OSS driver, aand
> its not designed to be used with other soundcards that are not made by
> Crippled Labs. Any comments ?

the linux version of open-al supports only two-speaker mode.
EAX on sb live is supported only on windows.
but i think the API itself of open-al is enough generic.


the implementation of 3d things on alsa-lib would be too much, IMO.
if a hardware supports 3d effects, they can be likely implemented on
the ALSA control API, so that the upper-library can treat them
generally.


Takashi


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