[alsa-devel] dsp after dmix

[Michael Trimarchi]

Hi

On Mon, Oct 14, 2013 at 2:15 PM, Clemens Ladisch <clemens at ladisch.de> wrote:
> Michael Trimarchi wrote:
>> On Mon, Oct 14, 2013 at 9:08 AM, Clemens Ladisch <clemens at ladisch.de> wrote:
>>> Michael Trimarchi wrote:
>>>> My problem is to apply filtering after dmix plugin.
>>>
>>> The dmix plugin works only on top of a "hw" device.
>>
>> Yes I have seen the code. Is there anyway to work with dps without passing
>> thought pulseaudio?
>
> 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?

Michael



>
> Regards,
> Clemens