md - Model Name (e.g. "Chromecast");id - UUID without hyphens of the particular device (e.g. xx12x3x456xx789xx01xx234x56789x0);fn - Friendly Name of the device (e.g. "Living Room"); rs - Unknown (recent share???) (e.g. "Youtube TV");bs - Uknonwn (e.g. "XX1XXX2X3456");st - Unknown (e.g. "1");ca - Unknown (e.g. "1234");ic - Icon path (e.g. "/setup/icon.png");ve - Version (e.g. "04").Chromecast - Regular chromecast, supports video/audio;Chromecast Audio - Chromecast Audio device, supports only audio.Proto files are taken from Chromium GitHub mirror.