[alsa-devel] Specifying the default buffer-size for snd-hda-intel

[Takashi Iwai]

At Thu, 14 Jul 2011 14:13:48 +0800,
Raymond Yau wrote:
> 
> > +config SND_HDA_PREALLOC_SIZE
> > +	int "Pre-allocated buffer size for HD-audio driver"
> > +	range 0 32768
> > +	default 64
> > +	help
> > +	  Speficies the default pre-allocated buffer-size in kB for
> > +	  HD-audio driver.  A larger buffer (e.g. 2048) is preferred
> > +	  for systems with PulseAudio.  The default 64 is chosen just
> > +	  from the compatibility reason.
> > +
> 
> +	range 0 32768
> -      range 64 32768
> 
> It seem that the minimum range cannot be zero

Zero is a valid value.  Then the buffer isn't pre-allocated but
allocated at each time PCM is opened (more exactly hw_params is
called).

> Does current PA server still work with sound drivers with  64K buffer  ?

Yes.


Takashi