From: Lee Revell <rlrevell@joe-job.com>
To: Assaf Hoffman <hoffman@marvell.com>
Cc: Rita Shtern <rita@marvell.com>, alsa-devel@lists.sourceforge.net
Subject: Re: ALSA HW buffer managment
Date: Tue, 07 Nov 2006 02:08:29 -0500 [thread overview]
Message-ID: <1162883310.22849.107.camel@mindpipe> (raw)
In-Reply-To: <B9FFC3F97441D04093A504CEA31B7C41F2677C@msilexch01.marvell.com>
On Tue, 2006-11-07 at 08:48 +0200, Assaf Hoffman wrote:
> Hi,
> As I understood, ALSA buffer management uses the 'periods' notion to
> control the latency between SW stack and HW DMA.
> My HW is not capable of interrupting the SW on a period basis. The only
> interrupt HW generates is on half or quarter of the DMA buffer (for
> example, in capture, after each half of the buffer is filled with
> samples the HW will signal interrupt).
"Period" just refers to the interval between interrupts. So your
hardware supports either 2 or 4 periods per buffer.
Did you read "Writing an ALSA driver"?
Lee
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next prev parent reply other threads:[~2006-11-07 7:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-07 6:48 ALSA HW buffer managment Assaf Hoffman
2006-11-07 7:08 ` Lee Revell [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-11-07 7:15 Assaf Hoffman
2006-11-07 12:15 ` Takashi Iwai
2006-11-07 13:11 Assaf Hoffman
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