Messages in this thread | | | Date | Mon, 3 Jul 2023 13:53:51 +0100 | From | Mark Brown <> | Subject | Re: [PATCH 1/6] media: v4l2: Add audio capture and output support |
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On Mon, Jul 03, 2023 at 02:07:10PM +0200, Takashi Iwai wrote: > Shengjiu Wang wrote:
> > There is no such memory to memory interface defined in ALSA. Seems > > ALSA is not designed for M2M cases.
> There is no restriction to implement memory-to-memory capture in ALSA > framework. It'd be a matter of the setup of PCM capture source, and > you can create a corresponding kcontrol element to switch the mode or > assign a dedicated PCM substream, for example. It's just that there > was little demand for that.
Yeah, it's not a terrible idea. We might use it more if we ever get better support for DSP audio, routing between the DSP and external devices if driven from the CPU would be a memory to memory thing.
> I'm not much against adding the audio capture feature to V4L2, > though, if it really makes sense. But creating a crafted /dev/audio* > doesn't look like a great idea to me, at least.
I've still not looked at the code at all. [unhandled content-type:application/pgp-signature] | |