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List:       linux-audio-dev
Subject:    Re: [linux-audio-dev] OSS will be back (was  Re: alsa, oss ,
From:       Fons Adriaensen <fons.adriaensen () skynet ! be>
Date:       2006-11-08 13:09:23
Message-ID: 20061108130923.GB6006 () linux-1 ! site
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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 ?

-- 
FA

Lascia la spina, cogli la rosa.

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