[Feature] Support for FCast Protocol

[Nerokor]

Description:

I would like to propose the support for the FCast protocol in Finamp. FCast is an open-source protocol that enables wireless streaming of audio and video content between devices, supporting various stream types such as DASH, HLS, and mp4. Integrating FCast into Finamp would enhance the app's functionality and provide users with more options for streaming their media.

You can find more information about FCast here

Thank you for considering this feature request!

[Chaphasilor]

While the idea is certainly nice and the protocol seems to be relatively basic, this currently has very low priority. There is no Flutter package that supports FCast which we could easily use, and building a manual implementation from the ground up is not feasible at the moment. Until receiver support is better (e.g. Kodi, headless linux on Rasperry Pi, maybe even Snapcast or MusicAssistant) I also have little personal incentive to support this.

We are currently working on integrating with Jellyfin's Play On functionality, both as a receiver (almost done) and sender (planning), and have started working on an output picker panel as part of this. So a later integration of FCast seems possible.

If anyone is willing to work on this, I'd be more than happy to accept a PR. Some basic Dart code implementing the FCast sender-side protocol would also help immensely.