[alsa-devel] dsp after dmix

Mark Brown broonie at kernel.org
Mon Oct 14 22:33:09 CEST 2013

On Mon, Oct 14, 2013 at 02:18:27PM +0200, Michael Trimarchi wrote:

> > You would have to write an ALSA kernel driver for the DSP device.

> This is not a good approach of the general problem because a lot of
> dsp has userspace
> support and firmware and initialization is done by userspace library.
> Can I change
> the writei and readi of the dmix plugin and let use my dsp function?

I'm not sure that's generally common - memory to memory DSPs are a bit
unusual for audio since the latency requirements tend to be fairly
tight.  I can't think of many examples that don't need some exposure to
the kernel...
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