1V4L2_TUNER_SUB_MONO 2V4L2_TUNER_SUB_STEREO 3V4L2_TUNER_SUB_LANG2 4V4L2_TUNER_SUB_SAP 5V4L2_TUNER_SUB_LANG1 6V4L2_TUNER_SUB_RDS 7