Showing the source name from media_player.select_source

Hi. i’m trying to make a remote control card using card-button addon from HACS.
i have a problem with source name from source_list.
what i need.
Аннотация 2020-11-01 205913
the channel name should be displayed in the uppermost rectangle when the TV is in livetv mode. when the source (media_player.select_source) hdmi1, then the source name would be displayed (hdmi1).