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123 lines
3.3 KiB
123 lines
3.3 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_METADATA_SECTION_H
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#define _UCSI_MPEG_METADATA_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_metadata_section structure.
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*/
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struct mpeg_metadata_section {
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struct section_ext head;
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/* uint8_t data[] */
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} __ucsi_packed;
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/**
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* Process an mpeg_metadata_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_metadata_section structure, or NULL on error.
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*/
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extern struct mpeg_metadata_section *mpeg_metadata_section_codec(struct section_ext *section);
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/**
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* Accessor for the random_access_indicator field of a metadata section.
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*
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* @param metadata metadata section pointer.
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* @return The random_access_indicator.
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*/
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static inline uint8_t mpeg_metadata_section_random_access_indicator(struct mpeg_metadata_section *metadata)
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{
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return metadata->head.reserved >> 1;
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}
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/**
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* Accessor for the decoder_config_flag field of a metadata section.
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*
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* @param metadata metadata section pointer.
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* @return The decoder_config_flag.
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*/
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static inline uint8_t mpeg_metadata_section_decoder_config_flag(struct mpeg_metadata_section *metadata)
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{
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return metadata->head.reserved & 1;
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}
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/**
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* Accessor for the fragment_indicator field of a metadata section.
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*
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* @param metadata metadata section pointer.
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* @return The fragment_indicator.
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*/
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static inline uint8_t mpeg_metadata_section_fragment_indicator(struct mpeg_metadata_section *metadata)
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{
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return metadata->head.reserved1;
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}
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/**
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* Accessor for the service_id field of a metadata section.
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*
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* @param metadata metadata section pointer.
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* @return The service_id.
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*/
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static inline uint16_t mpeg_metadata_section_service_id(struct mpeg_metadata_section *metadata)
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{
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return metadata->head.table_id_ext >> 8;
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}
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/**
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* Retrieve pointer to data field of an mpeg_metadata_section.
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*
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* @param s mpeg_metadata_section pointer.
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* @return Pointer to the field.
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*/
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static inline uint8_t *
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mpeg_metadata_section_data(struct mpeg_metadata_section *s)
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{
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return (uint8_t *) s + sizeof(struct mpeg_metadata_section);
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}
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/**
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* Determine length of the data field of an mpeg_copyright_descriptor.
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*
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* @param s mpeg_metadata_section_data pointer.
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* @return Length of field in bytes.
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*/
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static inline int
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mpeg_metadata_section_data_length(struct mpeg_metadata_section *s)
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{
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return section_ext_length(&s->head) - sizeof(struct mpeg_metadata_section);
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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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