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

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.