Thank you!
I actually don't know the embedded world at all. My background is WebRTC/userland programming. My answers aren't going to be great, but this is where my learning is at today :)
> What systems are target of the SDK besides embedded linux
I had a few conversations with embedded devs and they said if I wrote this in Pure C (and avoided GCC-isms) it would work well for. Most of the people I have worked with so far are doing embedded Linux, a few are doing non-Linux but I just get bug reports from them. They tell me their C compiler chokes on this etc...
> I looked for some kind of platform abstraction layer
We have a library called PiC[0] that does some of that. I don't think it is as low level as you are thinking though! It has portable atomics, and allows people to provide their own allocators stuff like that.
> not sure whether it would be worthwhile at all to run something like WebRTC on a MCU with a RTOS
Yea I think it would be pretty hard. Getting usrsctp and OpenSSL on those devices seem pretty insane. I have looked at OpenSSL alternatives, but for usrsctp I think we will need to solve it ourselves. I want to explore bringing down the footprint more, but the project is really driven by customer demands and no one has explicitly asked yet.
[0] https://github.com/awslabs/amazon-kinesis-video-streams-prod...