I don't know which part you're most interested in, but in a nutshell: the events are fetched from the same API as the Apple TV Events app (found that using a proxy), the Chromecast streaming uses Bonjour to find Chromecast devices on the network and the CASTV2 protocol over TCP to send commands to them.
> This framework implements the Google Cast APIs so they can be used in macOS apps. Google provides an official SDK but it is only for iOS and closed source.
VLC has Chromecast support in the development version, and has had it for over a year now. They had to reverse-engineer the protocol. I think the UI is a bit cludgey but it works.
The Chromecast protocol specification (CASTV2) itself is sort of open. To implement it on macOS I did a little bit of reverse engineering and used a description of the protocol I found here: https://github.com/thibauts/node-castv2
Yes, I went to the link quite happy because I thought it was related to AppleEvents and maybe Apple Scripts. Your app is definitely cool, congratulations on your work but the name got me fooled.
PS: Maybe the HN people haven't used MacOS 9 and AppleScript a lot and will not do the association I did.
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[ 3.0 ms ] story [ 43.6 ms ] threadSo this means other applications like Firefox, VLC etc... would have to reverse engineer the protocol.
edit: but is it really open source as said by previous comment or is it just an SDK ?
> This framework implements the Google Cast APIs so they can be used in macOS apps. Google provides an official SDK but it is only for iOS and closed source.
PS: Maybe the HN people haven't used MacOS 9 and AppleScript a lot and will not do the association I did.