[alsa-devel] Multiple channels mapping
tiwai at suse.de
Wed Feb 8 10:23:45 CET 2012
At Wed, 08 Feb 2012 10:18:29 +0100,
Clemens Ladisch wrote:
> Takashi Iwai wrote:
> > Currently the channel-mapping information is a missing piece in ALSA
> > framework, and it's a very long-standing item on my TODO list.
> > The implementation itself should be easy, but the only question is the
> > API design. If you have a good proposal, please speak up.
> TLVs on media controller entities.
Well, my concern is that it might be too far from the other PCM
stuff. How the implementation would look like?
BTW, the channel-mapping info can be useful for the automatic plug
layer, too. It would re-route the channels when not following
ALSA-standard maps automatically, for example. (Remember some old
More question is whether this information should be available before
or after hw_params setup.
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