[alsa-devel] Required/preferred multichannel order for ALSA

[Takashi Iwai]

At Fri, 27 Apr 2012 10:57:34 +0100,
Mark Brown wrote:
> 
> On Fri, Apr 27, 2012 at 10:21:37AM +0100, Liam Girdwood wrote:
> 
> > A lot of hardware now can remap channels to suit the use case so it
> > would probably be good to have an ALSA API to get/set the mappings.
> 
> As well as being able to reorder things there's also the cases where a
> multi-channel link can be assigned to send several independant streams
> rather than actually be a multi-channel link.

True.  OTOH, separating to different streams can be done mostly
without extra configuration.  The driver may neeed to handle the
open/close race, but basically splitting can be done uniquely just by
the number of channels.  Of course, there might be other excpetions
and corner cases, though.


Takashi