@spec listen(port(), binary(), String.t(), integer()) :: [{integer(), binary()}]

Receives count voice packets from the UDP socket.

Returns a list of {ssrc, opus_data} tuples.

@spec open_udp_and_discover(String.t(), integer(), integer()) ::
  {:ok, port(), String.t(), integer()} | {:error, term()}

Opens a UDP socket and performs IP discovery against the voice server.

Returns {:ok, socket, our_ip, our_port} or {:error, reason}.

@spec play(String.t(), String.t() | Enumerable.t(), atom(), map(), keyword()) :: pid()

Starts playing audio from the given input. Runs as a linked process.

Types:

• :url - URL or file path passed to ffmpeg
• :raw - Raw opus frames (binary stream)

Returns the pid of the player process.