From: Takashi Iwai <tiwai@suse.de>
To: Kasparek Tomas <xkaspa06@stud.fee.vutbr.cz>
Cc: alsa-devel@lists.sourceforge.net
Subject: Re: Meaning of "pointer" operations
Date: Fri, 22 Mar 2002 17:02:30 +0100 [thread overview]
Message-ID: <s5hhen8ioa1.wl@alsa2.suse.de> (raw)
In-Reply-To: <Pine.BSF.4.44.0203221038490.53229-100000@fest.stud.fee.vutbr.cz>
Hi,
At Fri, 22 Mar 2002 11:09:20 +0100 (CET),
Kasparek Tomas wrote:
>
> Hi all,
>
> I would like to ask you , ALSA gurus for some help.
>
> What is exact meaning if "pointer" operations.
>
> I know, that it should return offset in DMA buffer. What I'm not sure
> about is unit - should the offset be in frames or in bytes. And should
> it be offset against begin of DMA buffer (runtime->dma_addr) or
> against actual period begin?
- in frames
- position from the DMA buffer start (not period boundary).
> I'm writing ALSA driver for UDA1341 on Compaq iPAQ (H3600). It produce
> some sound yet, but it's far from beeing usable. Actually I'm forking on
> DMA part, and I got these messages from ALSA core (included in my debug
> listing). If you could give me some hint, what this should be about, I
> will be pleased :) (listing is a bit longer :(
could you put the source somewhere on net?
ciao,
Takashi
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next prev parent reply other threads:[~2002-03-22 16:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-22 10:09 Meaning of "pointer" operations Kasparek Tomas
2002-03-22 16:02 ` Takashi Iwai [this message]
2002-03-30 14:05 ` pmac.c compilation error matt yee-king
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