On Tue, 2006-03-28 at 16:06 +0200, Takashi Iwai wrote:

> A relatively easy workaround is to create two PCM instances, each of
> which is dedicated for only a single direction.  Then you can define
> appropriate configuration in alsa-lib to choose the right PCM number.
> The drawbacks are about the kernel OSS emulator, as usual.

Ok I guess that would work. But my current workaround with just defining
both directions and refusing access to those that don't work seems to do
fine too.

> Alternatively, we can create a new function,
> e.g. snd_pcm_register_stream(), for doing what snd_pcm_dev_register()
> does for a single stream.  It's an exception only for PCM which may
> have multiple device files.

Yes, that'd be good to have, indeed it would essentially be a code move
and the old code would call the new function.

> I have a rough design of new PCM middle layer in my head to reduce
> snd_pcm struct, and it would work fine in your case.  Nevertheless,
> it's still a vaporware :)

Heh :) Make sure to include some compressed content stuff, it could just
be a different format or something...

If you post a braindump I'll take a look and comment on it :)

johannes