From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/dvb/sit_section.h | 173 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 lib/libucsi/dvb/sit_section.h (limited to 'lib/libucsi/dvb/sit_section.h') diff --git a/lib/libucsi/dvb/sit_section.h b/lib/libucsi/dvb/sit_section.h new file mode 100644 index 0000000..e06d596 --- /dev/null +++ b/lib/libucsi/dvb/sit_section.h @@ -0,0 +1,173 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#ifndef _UCSI_DVB_SIT_SECTION_H +#define _UCSI_DVB_SIT_SECTION_H 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include + +/** + * dvb_sit_section structure. + */ +struct dvb_sit_section { + struct section_ext head; + + EBIT2(uint16_t reserved : 4; , + uint16_t transmission_info_loop_length :12; ); + /* struct descriptor descriptors[] */ + /* struct dvb_sit_service services[] */ +}; + +/** + * An entry in the services field of a dvb_sit_section. + */ +struct dvb_sit_service { + uint16_t service_id; + EBIT3(uint16_t reserved : 1; , + uint16_t running_status : 3; , + uint16_t service_loop_length :12; ); + /* struct descriptor descriptors[] */ +}; + +/** + * Process a dvb_sit_section. + * + * @param section Generic section_ext structure. + * @return dvb_sit_section pointer, or NULL on error. + */ +struct dvb_sit_section * dvb_sit_section_codec(struct section_ext *section); + +/** + * Iterator for descriptors field in a dvb_sit_section. + * + * @param sit dvb_sit_section Pointer. + * @param pos Variable holding pointer to current descriptor. + */ +#define dvb_sit_section_descriptors_for_each(sit, pos) \ + for ((pos) = dvb_sit_section_descriptors_first(sit); \ + (pos); \ + (pos) = dvb_sit_section_descriptors_first(sit)) + +/** + * Iterator for services field in a dvb_sit_section. + * + * @param sit dvb_sit_section Pointer. + * @param pos Variable holding pointer to current dvb_sit_service. + */ +#define dvb_sit_section_services_for_each(sit, pos) \ + for ((pos) = dvb_sit_section_services_first(sit); \ + (pos); \ + (pos) = dvb_sit_section_services_next(sit, pos)) + +/** + * Iterator for descriptors field in a dvb_sit_service. + * + * @param service dvb_sit_service Pointer. + * @param pos Variable holding pointer to current descriptor. + */ +#define dvb_sit_service_descriptors_for_each(service, pos) \ + for ((pos) = dvb_sit_service_descriptors_first(service); \ + (pos); \ + (pos) = dvb_sit_service_descriptors_next(service, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct descriptor * + dvb_sit_section_descriptors_first(struct dvb_sit_section *sit) +{ + if (sit->transmission_info_loop_length == 0) + return NULL; + + return (struct descriptor *) + ((uint8_t *) sit + sizeof(struct dvb_sit_section)); +} + +static inline struct descriptor * + dvb_sit_section_descriptors_next(struct dvb_sit_section *sit, + struct descriptor* pos) +{ + return next_descriptor((uint8_t*) sit + sizeof(struct dvb_sit_section), + sit->transmission_info_loop_length, + pos); +} + +static inline struct dvb_sit_service * + dvb_sit_section_services_first(struct dvb_sit_section *sit) +{ + size_t pos = sizeof(struct dvb_sit_section) + sit->transmission_info_loop_length; + + if (pos >= section_ext_length(&sit->head)) + return NULL; + + return (struct dvb_sit_service*) ((uint8_t *) sit + pos); +} + +static inline struct dvb_sit_service * + dvb_sit_section_services_next(struct dvb_sit_section *sit, + struct dvb_sit_service *pos) +{ + uint8_t *end = (uint8_t*) sit + section_ext_length(&sit->head); + uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_sit_service) + + pos->service_loop_length; + + if (next >= end) + return NULL; + + return (struct dvb_sit_service *) next; +} + +static inline struct descriptor * + dvb_sit_service_descriptors_first(struct dvb_sit_service * t) +{ + if (t->service_loop_length == 0) + return NULL; + + return (struct descriptor *) + ((uint8_t *) t + sizeof(struct dvb_sit_service)); +} + +static inline struct descriptor * + dvb_sit_service_descriptors_next(struct dvb_sit_service *t, + struct descriptor* pos) +{ + return next_descriptor((uint8_t*) t + sizeof(struct dvb_sit_service), + t->service_loop_length, + pos); +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3