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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_CAT_SECTION_H
#define _UCSI_MPEG_CAT_SECTION_H 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/section.h>
/**
* mpeg_cat_section structure.
*/
struct mpeg_cat_section {
struct section_ext head;
/* struct descriptor descriptors[] */
} __ucsi_packed;
/**
* Process an mpeg_cat_section.
*
* @param section The generic section_ext structure.
* @return Pointer to an mpeg_cat_section structure, or NULL on error.
*/
extern struct mpeg_cat_section *mpeg_cat_section_codec(struct section_ext *section);
/**
* Convenience iterator for descriptors field of an mpeg_cat_section.
*
* @param cat The mpeg_cat_section pointer.
* @param pos Variable holding a pointer to the current descriptor.
*/
#define mpeg_cat_section_descriptors_for_each(cat, pos) \
for ((pos) = mpeg_cat_section_descriptors_first(cat); \
(pos); \
(pos) = mpeg_cat_section_descriptors_next(cat, pos))
/******************************** PRIVATE CODE ********************************/
static inline struct descriptor *
mpeg_cat_section_descriptors_first(struct mpeg_cat_section *cat)
{
size_t pos = sizeof(struct mpeg_cat_section);
if (pos >= section_ext_length(&cat->head))
return NULL;
return (struct descriptor*)((uint8_t *) cat + pos);
}
static inline struct descriptor *
mpeg_cat_section_descriptors_next(struct mpeg_cat_section *cat,
struct descriptor* pos)
{
return next_descriptor((uint8_t *) cat + sizeof(struct mpeg_cat_section),
section_ext_length(&cat->head) - sizeof(struct mpeg_cat_section),
pos);
}
#ifdef __cplusplus
}
#endif
#endif
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