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

[Pavel Hofman]

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.