Playback change notifications

[n1mda]

The regular Sonos controller appears to get automatic notifications on changes in playback on any sonos device. If you change the volume via any means, ie. another controller, or via some other API the regular controller updates the volume level immediately. Thus it seems likes sonos devices sends out packets on the network notifying any controllers about changes. Perhaps via broadcasting packets or whatever, I haven't looked into it.

Is this something we can implement in Play? Instead of polling the playback status every n second for example.

[nathanborror]

Yeah I've noticed these requests in Wireshark but I'm not well versed in how this actually works. It's on my list of things to eventually figure out but not sure when I'll get to it.

[n1mda]

I created some code to discover devices on a local network, available here: https://github.com/n1mda/sonos-objc
Take a look at SonosDiscover.h/m