From: Clemens Ladisch <clemens@ladisch.de>
To: l9jj@163.com
Cc: alsa-devel@alsa-project.org
Subject: Re: what is period_size, buffer_size and boundary size, i confuse them
Date: Mon, 10 Dec 2012 09:24:37 +0100 [thread overview]
Message-ID: <50C59C45.7040109@ladisch.de> (raw)
In-Reply-To: <5ec59db3.354.13b83dc3158.Coremail.l9jj@163.com>
l9jj@163.com wrote:
> does the variable buffer_size equal to DMA size?
Yes.
> (2)how the pos>buffer_size will happen in the interface snd_pcm_update_hw_ptr0()?
It happens when your driver has a bug. The .pointer callback always must
return value that is inside the DMA buffer.
Regards,
Clemens
next prev parent reply other threads:[~2012-12-10 8:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 8:09 what is period_size, buffer_size and boundary size, i confuse them l9jj
2012-12-10 8:24 ` Clemens Ladisch [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-12-10 9:19 l9jj
2012-12-09 14:37 l9jj
2012-12-09 16:22 ` Clemens Ladisch
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