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