Function gst_ player_ get_ current_ audio_ track 
Source pub unsafe extern "C" fn gst_player_get_current_audio_track(
    player: *mut GstPlayer,
) -> *mut GstPlayerAudioInfopub unsafe extern "C" fn gst_player_get_current_audio_track(
    player: *mut GstPlayer,
) -> *mut GstPlayerAudioInfo