[linux-audio-dev] OSS will be back (was Re: alsa, oss , efficiency?)

Fons Adriaensen fons.adriaensen at skynet.be
Wed Nov 8 13:09:23 UTC 2006

On Wed, Nov 08, 2006 at 12:20:42AM +0000, James Courtier-Dutton wrote:

> The current jackd skips a step in the processing of the poll events.

Looking at the code it seems already quite elaborate.

Basically what happens comes down to (ignoring error
checking and timeouts):

- The set of pollfd is poll()'ed until all are ready.
- Within each iteration of the loop the pollfd used
  are re-initialised by a call to the alsa library.
- There is one optimisation: the pollfd are divided
  into two groups, one for capture and one for playback.
  A group that is complete is not polled again.

I use similar code in libclalsadrv and in a new
jackd backend that I wrote last week.

What is misssing ?


Lascia la spina, cogli la rosa.

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