ALSA pcmv2

[Miller Puckette]

Sorry if this is a duplicate... I tried to reply but I believe my reply
got eaten by the great postaman in the sky.

I'm about to release Pd 0.30, in a day or so I hope, just to warn everyone...

I don't think OSS's interleaving scheme is necessarily advantageous over
any other scheme that you could propose.  Perhaps there's a much better
one...?  Perhaps ALSA will even find one and incorporate it for their
multichannel support.
cheers
Miller

On Sat, Mar 04, 2000 at 05:43:10PM -0500, Karl MacMillan wrote:
> After about a week of staring at perfectly good code for writing to the
> ALSA sound drivers from PD and wondering why it didn't work I finally
> realized that I was giving the read/write commands the size parameter in
> number of samples instead of bytes!  It is always the easy things that
> are hard to debug.  Regardless, full duplex now works.  I need to do
> some more testing and get the buffering nice, add the extra command line
> parameters to choose between the different modes, and everything will be
> through (well, no raw midi support and probably nothing beyond two
> channels in four out until the ALSA people decide how best to support
> multi-channel cards like the Hammerfall).  
> 
> One question about the OSS code - what is the advantage to the
> interleaving scheme used?  It is not the most obvious way to me (though
> that doesn't mean much after this week), so I thought there must be a
> reason to go to that trouble.
> 
> Karl
> 
> -- 
> _____________________________________________________
> | Karl W. MacMillan                                 |
> | Peabody Institute of the Johns Hopkins University |
> | Network and Telecommunications Services           |
> | karlmac at peabody.jhu.edu                           |
> | 410/659-8297                                      |
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