[alsa-devel] Direct use of the DMA buffer?

Pavel Hofman pavel.hofman at ivitera.com
Mon Feb 20 09:38:44 CET 2012

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.


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