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* section and descriptor parser
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* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
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* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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#ifndef _UCSI_DVB_SDT_SECTION_H
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#define _UCSI_DVB_SDT_SECTION_H 1
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#include <libucsi/section.h>
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* dvb_sdt_section structure.
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struct dvb_sdt_section {
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struct section_ext head;
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uint16_t original_network_id;
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/* struct dvb_sdt_service services[] */
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* An entry in the services field of a dvb_sdt_section.
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struct dvb_sdt_service {
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EBIT3(uint8_t reserved : 6; ,
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uint8_t eit_schedule_flag : 1; ,
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uint8_t eit_present_following_flag : 1; );
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EBIT3(uint16_t running_status : 3; ,
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uint16_t free_ca_mode : 1; ,
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uint16_t descriptors_loop_length :12; );
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/* struct descriptor descriptors[] */
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* Process a dvb_sdt_section.
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* @param section Pointer to a generic section_ext structure.
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* @return dvb_sdt_section pointer, or NULL on error.
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struct dvb_sdt_section * dvb_sdt_section_codec(struct section_ext *section);
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* Accessor for the transport_stream_id field of an SDT.
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* @param sdt SDT pointer.
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* @return The transport_stream_id.
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static inline uint16_t dvb_sdt_section_transport_stream_id(struct dvb_sdt_section *sdt)
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return sdt->head.table_id_ext;
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* Iterator for the services field in a dvb_sdt_section.
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* @param sdt dvb_sdt_section pointer.
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* @param pos Variable containing a pointer to the current dvb_sdt_service.
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#define dvb_sdt_section_services_for_each(sdt, pos) \
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for ((pos) = dvb_sdt_section_services_first(sdt); \
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(pos) = dvb_sdt_section_services_next(sdt, pos))
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* Iterator for the descriptors field in a dvb_sdt_service.
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* @param service dvb_sdt_service pointer.
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* @param pos Variable containing a pointer to the current descriptor.
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#define dvb_sdt_service_descriptors_for_each(service, pos) \
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for ((pos) = dvb_sdt_service_descriptors_first(service); \
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(pos) = dvb_sdt_service_descriptors_next(service, pos))
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/******************************** PRIVATE CODE ********************************/
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static inline struct dvb_sdt_service *
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dvb_sdt_section_services_first(struct dvb_sdt_section * sdt)
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size_t pos = sizeof(struct dvb_sdt_section);
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if (pos >= section_ext_length(&sdt->head))
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return (struct dvb_sdt_service*) ((uint8_t *) sdt + pos);
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static inline struct dvb_sdt_service *
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dvb_sdt_section_services_next(struct dvb_sdt_section * sdt,
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struct dvb_sdt_service * pos)
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uint8_t *end = (uint8_t*) sdt + section_ext_length(&sdt->head);
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uint8_t *next = (uint8_t*) pos + sizeof(struct dvb_sdt_service) +
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pos->descriptors_loop_length;
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return (struct dvb_sdt_service *) next;
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static inline struct descriptor *
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dvb_sdt_service_descriptors_first(struct dvb_sdt_service *svc)
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if (svc->descriptors_loop_length == 0)
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return (struct descriptor *)
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((uint8_t*) svc + sizeof(struct dvb_sdt_service));
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static inline struct descriptor *
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dvb_sdt_service_descriptors_next(struct dvb_sdt_service *svc,
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struct descriptor* pos)
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return next_descriptor((uint8_t*) svc + sizeof(struct dvb_sdt_service),
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svc->descriptors_loop_length,
added
removed
src/libucsi/dvb/sdt_section.h
