A player's connection to a game server anywhere: the same Phoenix channel a browser uses, over a WebSocket, speaking Cauldron2D.Net.Wire.

{:ok, link} = Cauldron2D.Net.Link.Socket.start_link(url: "http://host:port", token: token, topic: "world:main", params: %{"side" => "left"}, owner: self())

The owner receives {:cauldron_link, :joined} or {:cauldron_link, :refused, reason}, then {:cauldron_link, :sheet, sheet, png} once (the PNG fetched from the server), {:cauldron_link, :audio, %{rate: hertz, channels: 1 | 2}} once (or :off, for no PCM at all, when asked for none or the server gives none), the format the PCM comes in, {:cauldron_link, :map, map} once, {:cauldron_link, :frame, frame} each tick, {:cauldron_link, :pcm, chunk} for the sound and {:cauldron_link, :closed, reason} when the connection ends. input/2, levels/3 and leave/1 are what the player does.

Options: :url, the server's base HTTP URL; :token, from the server's login; :topic; :params, the join params; :owner; :path, the socket's path (default "/socket/websocket"); :audio, the PCM format to ask for as %{rate: hertz, channels: 1 | 2} (default the server's choice).