[alsa-devel] Can we add optional parameters in snd_pcm_hw_params

Raul Xiong raulxiong at gmail.com
Wed Jan 20 10:07:52 CET 2010

Thanks Mark.

That's a good idea. But consider below scenario,
Assuming I'm implementing a external PCM plug-in. Inside this plug-in there
are two working mode. How can the plug-in get the mode parameter?

2010/1/19 Mark Brown <broonie at opensource.wolfsonmicro.com>

> On Tue, Jan 19, 2010 at 09:35:10PM +0800, Raul Xiong wrote:
> > Basically, my requirment is: There are two modes: ModeA and ModeB. I'd
> like
> > application to set this mode before it begin playing. If you have other
> > better methods to reach this requirment, it's also welcome. Thanks.
> Why not just expose a regular control for this and store the value in
> your private data?

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