From: Takashi Iwai <tiwai@suse.de>
To: Norbert van Bolhuis <nvbolhuis@aimvalley.nl>
Cc: alsa-devel@alsa-project.org
Subject: Re: sw parameter boundary
Date: Wed, 25 Jun 2008 17:45:45 +0200 [thread overview]
Message-ID: <s5h3an18qmu.wl%tiwai@suse.de> (raw)
In-Reply-To: <48620563.3050207@aimvalley.nl>
At Wed, 25 Jun 2008 10:44:19 +0200,
Norbert van Bolhuis wrote:
>
>
> is the boundary sw parameter still used ?
Yes.
> where is it for ?
It defines the wrap point to the position 0.
> in the PCM kernel core (e.g. snd_pcm_playback_avail) it clearly serves
> as a pointers wrap point, but which one ?
It's for the absolute position handled internally. This isn't
exported outside, so you don't care much about it, normally.
> The one at the end of the DMA buffer or the one at the end of a process
> (virtual) address range (4 GB) ?
No.
Takashi
next prev parent reply other threads:[~2008-06-25 15:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-25 8:44 sw parameter boundary Norbert van Bolhuis
2008-06-25 15:45 ` Takashi Iwai [this message]
2008-06-26 8:43 ` Norbert van Bolhuis
2008-06-26 10:19 ` Takashi Iwai
2008-06-26 14:36 ` Norbert van Bolhuis
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