DMA sound compatability with OSS API

[Paul Mackerras]

Joshua Gargus <gargus at cs.ualberta.ca> wrote:

> I'm trying to compile an application (the virtual machine for Squeak 
> Smalltalk) that requires several ioctl() calls defined in 'soundcard.h', 
> including 'SNDCTL_DSP_GETCAPS' and 'SNDCTL_DSP_GETOSPACE'.
> These are not defined in 'drivers/sounds/dmasound.c', although the 
> comment at the top of the file declares it to be 'OSS compatable'.
> 
> I don't know too much about this stuff at all.  Is there some reason that
> the Macintosh sound hardware cannot support these calls, or have they
> just not been implemented yet?  Is adding support for these calls in the
> works, or is it an itch I'll have to scratch for myself?

Basically they just haven't been implemented yet.  I don't know if
anyone is actively working on doing them at present.  They shouldn't
be too hard to implement.

Paul.

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