[alsa-devel] [PATCH v2 2/3] ASoC: topology: Add topology core

[Liam Girdwood]

On Wed, 2015-05-27 at 20:48 +0100, Mark Brown wrote:
> On Wed, May 27, 2015 at 09:23:03PM +0200, Lars-Peter Clausen wrote:
> 
> > Ideally we'd turn the dependency chain the other way around and have a
> > snd_soc_dobj_widget struct which inherits snd_soc_dapm_widget and
> > snd_soc_dobj. In the dobj callbacks you can then still use container_of to
> > get it. This comes at the expense that we have to add a free() callback to
> > snd_soc_dapm_widget. But it opens up the possibility to have other
> > specialized widgets sub-classes. snd_soc_dapm_widget is already rather large
> > given how many instance we have of it and quite a few of the fields are only
> > used by a particular type of widget. Another good candidate for example
> > would be the DAI link widget with all its params fields.
> 
> Yeah, I was thinking something along those lines might be good long term
> but it's definitely a separate thing to getting the topology stuff in
> and I started worrying about things like multiple inheritance.

Yeah this would also help in reducing memory footprint. Probably a topic
for the audio mini conf ?

Liam