pcm hw parameters?

[Johannes Berg <johannes@sipsolutions.net>]

[-- Attachment #1: Type: text/plain, Size: 816 bytes --]

Hi,

Quick question: When are the pcm hardware parameters surfaced to
userspace? Are those the ones I register in snd_pcm_new?

Thing is -- I have the problem that in theory, my codec can support
anything from 8KHz to 96KHz but when turning on digital output, it needs
to be restricted to the ones the digital output is ok with.

Of course I can trivially forbid turning on the digital out when a wrong
stream is open, but what about the other way around? When digital out is
turned on, and I forbid opening the stream when say 8KHz is selected,
does it screw over userspace and fail, or can I tell it what else to
use?

Similar things happen when you have digital input and it clocks both out
and in -- then you have to output the same bitrate as the input is
coming in at...

Thanks,
johannes

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 793 bytes --]