[alsa-devel] ALSA/ASOC new device and routing

[Eli Britstein]

Hi

I'm a newbie to ALSA.
I'm targeting to use ALSA or ASoC solution in order to route capture/playback streams of a USB headset (that uses ALSA) to/from my own DSP device.
I saw DPCM which is a part of ASoC manages dynamically connections between FE and BE streams.
In my product, I just need them to be connected. No need for the "dynamically" part.

My questions:
1. Can someone please recommend a step by step guide, or an example how to make my DSP "look like" a BE? Do I need to write an ALSA driver for it or a ASOC driver?
2. After I have it as a BE, how can I connect the streams? I want the transfers to be done in kernel level, without need for application interventions for each buffer.
3. I'm using kernel 2.6.10 (quite old, I know). I don't want to port my entire kernel to a new one. As my requirement is not very complex, I don't think I'd encounter too many issues. However, if someone can point the important parts I need to back port, I'd appreciate it. Alternatively, if someone sees a showstopper in this approach, I'd be grateful to be aware of it.


Thanks,
Best regards,

Eli

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