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136 lines
3.7 KiB
136 lines
3.7 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_DVB_PARENTAL_RATING_DESCRIPTOR
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#define _UCSI_DVB_PARENTAL_RATING_DESCRIPTOR 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/descriptor.h>
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#include <libucsi/endianops.h>
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#include <libucsi/types.h>
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/**
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* Defined values for the rating field.
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*/
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enum {
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DVB_PARENTAL_RATING_MIN_3YEARS = 0x01,
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DVB_PARENTAL_RATING_MIN_4YEARS = 0x02,
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DVB_PARENTAL_RATING_MIN_5YEARS = 0x03,
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DVB_PARENTAL_RATING_MIN_6YEARS = 0x04,
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DVB_PARENTAL_RATING_MIN_7YEARS = 0x05,
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DVB_PARENTAL_RATING_MIN_8YEARS = 0x06,
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DVB_PARENTAL_RATING_MIN_9YEARS = 0x07,
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DVB_PARENTAL_RATING_MIN_10YEARS = 0x08,
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DVB_PARENTAL_RATING_MIN_11YEARS = 0x09,
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DVB_PARENTAL_RATING_MIN_12YEARS = 0x0a,
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DVB_PARENTAL_RATING_MIN_13YEARS = 0x0b,
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DVB_PARENTAL_RATING_MIN_14YEARS = 0x0c,
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DVB_PARENTAL_RATING_MIN_15YEARS = 0x0d,
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DVB_PARENTAL_RATING_MIN_16YEARS = 0x0e,
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DVB_PARENTAL_RATING_MIN_17YEARS = 0x0f,
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};
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/**
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* dvb_parental_rating_descriptor structure.
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*/
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struct dvb_parental_rating_descriptor {
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struct descriptor d;
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/* struct dvb_parental_rating ratings[] */
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} __ucsi_packed;
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/**
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* An entry in the ratings field of a dvb_parental_rating_descriptor.
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*/
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struct dvb_parental_rating {
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iso639country_t country_code;
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uint8_t rating;
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} __ucsi_packed;
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/**
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* Process a dvb_parental_rating_descriptor.
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*
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* @param d Generic descriptor structure pointer.
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* @return dvb_parental_rating_descriptor pointer, or NULL on error.
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*/
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static inline struct dvb_parental_rating_descriptor*
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dvb_parental_rating_descriptor_codec(struct descriptor* d)
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{
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if (d->len % sizeof(struct dvb_parental_rating))
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return NULL;
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return (struct dvb_parental_rating_descriptor*) d;
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}
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/**
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* Iterator for entries in the ratings field of a dvb_parental_rating_descriptor.
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*
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* @param d dvb_parental_rating_descriptor pointer.
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* @param pos Variable containing a pointer to the current dvb_parental_rating.
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*/
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#define dvb_parental_rating_descriptor_ratings_for_each(d, pos) \
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for ((pos) = dvb_parental_rating_descriptor_ratings_first(d); \
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(pos); \
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(pos) = dvb_parental_rating_descriptor_ratings_next(d, pos))
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/******************************** PRIVATE CODE ********************************/
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static inline struct dvb_parental_rating*
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dvb_parental_rating_descriptor_ratings_first(struct dvb_parental_rating_descriptor *d)
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{
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if (d->d.len == 0)
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return NULL;
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return (struct dvb_parental_rating *)
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((uint8_t*) d + sizeof(struct dvb_parental_rating_descriptor));
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}
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static inline struct dvb_parental_rating*
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dvb_parental_rating_descriptor_ratings_next(struct dvb_parental_rating_descriptor *d,
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struct dvb_parental_rating *pos)
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{
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uint8_t *end = (uint8_t*) d + 2 + d->d.len;
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uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_parental_rating);
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if (next >= end)
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return NULL;
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return (struct dvb_parental_rating *) next;
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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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