Re: [RFC] Zero-conf ALSA

[Lee Revell <rlrevell@joe-job.com>]

On Thu, 2005-12-15 at 11:52 +0100, Takashi Iwai wrote:
> At Wed, 14 Dec 2005 17:27:01 -0500,
> Lee Revell wrote:
> > 
> > On Thu, 2005-11-24 at 11:28 +0100, Takashi Iwai wrote:
> > > > Can #2 be solved by having dmix prefer power of two period/buffer
> > > sizes
> > > > for the slave hw PCM by default?  AFAICT this should work unless an
> > > ALSA
> > > > app has opened the device first and set an incompatible buffer size.
> > > 
> > > It's not so easy, unfortunately.  We'll need to fix to allow dmix the
> > > arbitrary period/buffer sizes.  As long as the constraints of slave
> > > PCM perido size exists, power-of-2 cannot be applied. 
> > 
> > Is the power of 2 period size restriction imposed by OSS, or dmix?
> 
> It's OSS.

Then why can't the OSS emulation open the slave PCM with a power of 2
period size by default?  AFAICT this would only fail if someone else has
already opened the slave PCM with a non power of 2 period/buffer.

Lee



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