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From: Pavel Hofman <pavel.hofman@ivitera.com>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: ALSA development <alsa-devel@alsa-project.org>
Subject: Re: Direct use of the DMA buffer?
Date: Mon, 20 Feb 2012 09:38:44 +0100	[thread overview]
Message-ID: <4F420694.6040902@ivitera.com> (raw)
In-Reply-To: <4F420017.70508@ladisch.de>


Dne 20.2.2012 09:11, Clemens Ladisch napsal(a):
> Pavel Hofman wrote:
>> Please excuse my ignorance, but is it possible for an application to
>> directly use/output to the DMA buffer allocated by the kernel in
>> hw_params?
> 
> Set one of the SND_PCM_ACCESS_MMAP_* access types and then use
> snd_pcm_mmap_begin/commit.
> 

Clemens, thanks a lot for the information. How does it work when the
alsa-lib chain contains plugins, such as plug, rate, etc.? I would
assume the application circumvents these.

Thanks a lot.

Pavel.

  reply	other threads:[~2012-02-20  8:38 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-19 23:11 Direct use of the DMA buffer? Pavel Hofman
2012-02-20  8:11 ` Clemens Ladisch
2012-02-20  8:38   ` Pavel Hofman [this message]
     [not found]     ` <4F4210A6.8010902@perex.cz>
2012-02-20  9:22       ` Jaroslav Kysela
2012-02-20  9:25       ` Pavel Hofman

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