[alsa-devel] Channel mapping
tiwai at suse.de
Wed Nov 21 12:42:40 CET 2007
At Tue, 20 Nov 2007 01:51:51 +0100,
Lennart Poettering wrote:
> 5) I really dislike the fact that ALSA insists to do the channel
> reordering for me if I access the audio device via
> "surround51:". In the interest of having the shortest pipeline
> possible with no redundant steps in PA, I'd prefer if I could open
> the device as hw:0, and query the suggested channel ordering of the
> HW, instead of always having ALSA around doing the rearranging.
Yes, querying channel mapping is another missing piece with popular
The implementation would be easy, I guess. But we have to define the
way to inform this from kernel to user space: whether create a new
ioctl or extend the existing ones (if possible)...
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