Re: [alsa-devel] How does ALSALIB commuciates with low level kernel API

Chemsi Mehdi wrote:

I want to underatnd how ALSA userspace API calls kernel space code ? for example when I call snd_pcm_open() which code is called in kernel sound code ?

The generic PCM code in alsa-lib/src/pcm/pcm.c calls some plugin. The "hw" plugin (in pcm_hw.c) handles communication with the kernel.

The kernel code is in sound/core/.

and how the link is made ? via IOCTL/write ?

Yes.

Regards, Clemens