v4l2_ctrl_radio_filter — Standard filter for radio controls.
bool v4l2_ctrl_radio_filter ( | const struct v4l2_ctrl * ctrl); |
This will return true for any controls that are valid for radio device nodes. Those are all of the V4L2_CID_AUDIO_* user controls and all FM transmitter class controls.
This function is to be used with v4l2_ctrl_add_handler.