Ynt: 4A Configuration for Custom Audio Structure

Hi Thierry,

Thank you for your answer,

We reviwed the unicens plugin and actually we couldn't understand how to modify it for our needs.

Our hardware supports hardware mixing features, so we want to use them without using the 4a-softmixer. How can we do this? Should we develop our own mixer binding for this? And can you explain the details of the hal configurations about this?

Best regards.

Gönderen: Thierry Bultel <thierry.bultel@xxxxxxx> adına automotive-discussions-bounces@xxxxxxxxxxxxxxxxxxxxxxxxx <automotive-discussions-bounces@xxxxxxxxxxxxxxxxxxxxxxxxx>
Gönderildi: 20 Mart 2019 Çarşamba 14:36:47
Kime: automotive-discussions@xxxxxxxxxxxxxxxxxxxxxxxxx
Konu: Re: 4A Configuration for Custom Audio Structure

Hi Yiğit,

sorry, but such a configuration has not been tested, this is the reason why there are no relevant examples in the available config files.
Therefore, I am not optimistic for having this working out of the box, without changes in 4a.

Some thoughts, however:
- This should be possible from userland, to create software controls attached to the card that has playback. You will have to write a piece of software for that.
- In 4a, to have a plugin that catches theses control events and re-routes them to the card4 (see the Unicens plugin, as an example)

Best regards
Thierry

Hello,

We trying to adapt 4a-framework to our custom board. We have a specific card(card 4) for control audio functions(equalizer settings, volume change etc.) and this card doesn't support playback or capture. You can find some card control commands, card list and HAL configuration in the attachments. 

I didn't find sample configuration for similar audio structure. Where can we define that card's commands and how can we assign the commands to different roles? For exaple, we want to send Source sai1dac command to the card, when the role changes to multimedia.

Best Regards.

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