+ int subtitling_type; /* see ETSI EN 300 468 table 26 component_type
+ when stream_content is 0x03
+ 0x10..0x13, 0x20..0x23 is used for dvb subtitles
+ 0x01 is used for teletext subtitles */
+ union
+ {
+ int composition_page_id; // used for dvb subtitles
+ int teletext_page_number; // used for teletext subtitles
+ };
+ union
+ {
+ int ancillary_page_id; // used for dvb subtitles
+ int teletext_magazine_number; // used for teletext subtitles
+ };