How to port OPUS with the nRF connect sd

[jhc]

How to build Opus with the nRF connect sdk toolchain, the target chipset is NRF52840,

Is there any example reference for integration or documentation for porting?

Hope you guys can help me, thanks!

[Maria Gilje]

Hello,

I assume that it is the Opus Codec you want to port? We don't have any specific guides for this, but maybe a Zephyr module is a possible way of integrating OPUS into nRF Connect SDK?

There may be people with some advice in the community here on DevZone or over in the Zephyr project's Discord server as well.

Best regards,

Maria

[Lorenzo Amicucci]

Hi, would ADPCM be interesting instead of OPUS?

[jhc]

ADPCM is an alternative solution we are considering. we want to try OPUS first.

[Lorenzo Amicucci]

for nRF Connect SDK, we did a remote project, and we added ADPCM between thingy and a dongle. (we ported this from old SDK to new one)

thingy code :

https://github.com/Noy0908/smart_remote/tree/desktop_remote

dongle code:

https://github.com/Noy0908/smart_remote/tree/mpsl-adpcm-usb-audio

 

ADPCM library:

https://github.com/Noy0908/smart_remote/blob/desktop_remote/src/smart_remote/dvi_adpcm.c

For OPUS, I think you can find some code in the old SDK (we had it for the smart remote 3), and you can try to port it to nRF Connect SDK. (it shoudld be a library, so porting should not bee too complex)
https://www.nordicsemi.com/Products/Reference-designs/nRFready-Smart-Remote-3-for-nRF52-Series/Download?lang=en#infotabs