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95 lines
2.5 KiB
95 lines
2.5 KiB
/*
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* section and descriptor parser
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*
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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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*
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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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*
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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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*
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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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*/
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#ifndef _UCSI_MPEG_TSDT_SECTION_H
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#define _UCSI_MPEG_TSDT_SECTION_H 1
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <libucsi/section.h>
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/**
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* mpeg_tsdt_section structure.
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*/
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struct mpeg_tsdt_section {
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struct section_ext head;
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/* struct descriptor descriptors[] */
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} __ucsi_packed;
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/**
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* Process an mpeg_tsdt_section structure.
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*
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* @param section Pointer to the section_ext structure.
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* @return Pointer to the mpeg_tsdt_section structure, or NULL on error.
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*/
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extern struct mpeg_tsdt_section *mpeg_tsdt_section_codec(struct section_ext *section);
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/**
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* Convenience iterator for descriptors field.
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*
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* @param tsdt Pointer to the mpeg_tsdt_section structure.
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* @param pos Variable holding a pointer to the current descriptor.
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*/
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#define mpeg_tsdt_section_descriptors_for_each(tsdt, pos) \
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for ((pos) = mpeg_tsdt_section_descriptors_first(tsdt); \
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(pos); \
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(pos) = mpeg_tsdt_section_descriptors_next(tsdt, pos))
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/******************************** PRIVATE CODE ********************************/
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static inline struct descriptor *
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mpeg_tsdt_section_descriptors_first(struct mpeg_tsdt_section * tsdt)
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{
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size_t pos = sizeof(struct mpeg_tsdt_section);
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if (pos >= section_ext_length(&tsdt->head))
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return NULL;
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return (struct descriptor*)((uint8_t *) tsdt + pos);
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}
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static inline struct descriptor *
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mpeg_tsdt_section_descriptors_next(struct mpeg_tsdt_section *tsdt,
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struct descriptor* pos)
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{
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return next_descriptor((uint8_t *) tsdt + sizeof(struct mpeg_tsdt_section),
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section_ext_length(&tsdt->head) - sizeof(struct mpeg_tsdt_section),
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pos);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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