From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/dvb/extended_event_descriptor.h | 232 ++++++++++++++++++++++++++++ 1 file changed, 232 insertions(+) create mode 100644 lib/libucsi/dvb/extended_event_descriptor.h (limited to 'lib/libucsi/dvb/extended_event_descriptor.h') diff --git a/lib/libucsi/dvb/extended_event_descriptor.h b/lib/libucsi/dvb/extended_event_descriptor.h new file mode 100644 index 0000000..bba04b0 --- /dev/null +++ b/lib/libucsi/dvb/extended_event_descriptor.h @@ -0,0 +1,232 @@ +/* + * 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_DVB_EXTENDED_EVENT_DESCRIPTOR +#define _UCSI_DVB_EXTENDED_EVENT_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include +#include + +/** + * dvb_extended_event_descriptor structure. + */ +struct dvb_extended_event_descriptor { + struct descriptor d; + + EBIT2(uint8_t descriptor_number : 4; , + uint8_t last_descriptor_number : 4; ); + iso639lang_t language_code; + uint8_t length_of_items; + /* struct dvb_extended_event_item items[] */ + /* struct dvb_extended_event_descriptor_part2 part2 */ +} __ucsi_packed; + +/** + * An entry in the items field of a dvb_extended_event_descriptor. + */ +struct dvb_extended_event_item { + uint8_t item_description_length; + /* uint8_t item_description[] */ + /* struct dvb_extended_event_item_part2 part2 */ +} __ucsi_packed; + +/** + * The second part of a dvb_extended_event_item, following the variable length + * description field. + */ +struct dvb_extended_event_item_part2 { + uint8_t item_length; + /* uint8_t item[] */ +} __ucsi_packed; + +/** + * The second part of a dvb_extended_event_descriptor, following the variable + * length items field. + */ +struct dvb_extended_event_descriptor_part2 { + uint8_t text_length; + /* uint8_t text[] */ +} __ucsi_packed; + +/** + * Process a dvb_extended_event_descriptor. + * + * @param d Generic descriptor structure. + * @return dvb_extended_event_descriptor pointer, or NULL on error. + */ +static inline struct dvb_extended_event_descriptor* + dvb_extended_event_descriptor_codec(struct descriptor* d) +{ + uint8_t* buf = (uint8_t*) d + 2; + uint32_t pos = 0; + uint32_t len = d->len; + struct dvb_extended_event_descriptor * p = + (struct dvb_extended_event_descriptor *) d; + struct dvb_extended_event_descriptor_part2 *p2; + + pos += sizeof(struct dvb_extended_event_descriptor) - 2; + + if (pos > len) + return NULL; + + pos += p->length_of_items; + + if (pos > len) + return NULL; + + p2 = (struct dvb_extended_event_descriptor_part2*) (buf+pos); + + pos += sizeof(struct dvb_extended_event_descriptor_part2); + + if (pos > len) + return NULL; + + pos += p2->text_length; + + if (pos != len) + return NULL; + + return p; +} + +/** + * Iterator for the items field of a dvb_extended_event_descriptor. + * + * @param d dvb_extended_event_descriptor pointer. + * @param pos Variable containing a pointer to the current dvb_extended_event_item. + */ +#define dvb_extended_event_descriptor_items_for_each(d, pos) \ + for ((pos) = dvb_extended_event_descriptor_items_first(d); \ + (pos); \ + (pos) = dvb_extended_event_descriptor_items_next(d, pos)) + +/** + * Accessor for the description field of a dvb_extended_event_item. + * + * @param d dvb_extended_event_item pointer. + * @return Pointer to the field. + */ +static inline uint8_t* + dvb_extended_event_item_description(struct dvb_extended_event_item *d) +{ + return (uint8_t*) d + sizeof(struct dvb_extended_event_item); +} + +/** + * Accessor for the second part of a dvb_extended_event_item. + * + * @param dvb_extended_event_item pointer. + * @return dvb_extended_event_item_part2 pointer. + */ +static inline struct dvb_extended_event_item_part2* + dvb_extended_event_item_part2(struct dvb_extended_event_item *d) +{ + return (struct dvb_extended_event_item_part2*) + ((uint8_t*) d + sizeof(struct dvb_extended_event_item) + + d->item_description_length); +} + +/** + * Accessor for the item field of a dvb_extended_event_item_part2. + * + * @param d dvb_extended_event_item_part2 pointer. + * @return Pointer to the item field. + */ +static inline uint8_t* + dvb_extended_event_item_part2_item(struct dvb_extended_event_item_part2 *d) +{ + return (uint8_t*) d + sizeof(struct dvb_extended_event_item_part2); +} + +/** + * Accessor for the second part of a dvb_extended_event_descriptor. + * + * @param d dvb_extended_event_descriptor pointer. + * @return dvb_extended_event_descriptor_part2 pointer. + */ +static inline struct dvb_extended_event_descriptor_part2* + dvb_extended_event_descriptor_part2(struct dvb_extended_event_descriptor *d) +{ + return (struct dvb_extended_event_descriptor_part2*) + ((uint8_t*) d + sizeof(struct dvb_extended_event_descriptor) + + d->length_of_items); +} + +/** + * Accessor for the text field of an dvb_extended_event_descriptor_part2. + * + * @param d dvb_extended_event_descriptor_part2 pointer. + * @return Pointer to the text field. + */ +static inline uint8_t* + dvb_extended_event_descriptor_part2_text(struct dvb_extended_event_descriptor_part2 *d) +{ + return (uint8_t*) + ((uint8_t*) d + sizeof(struct dvb_extended_event_descriptor_part2)); +} + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_extended_event_item* + dvb_extended_event_descriptor_items_first(struct dvb_extended_event_descriptor *d) +{ + if (d->length_of_items == 0) + return NULL; + + return (struct dvb_extended_event_item *) + ((uint8_t*) d + sizeof(struct dvb_extended_event_descriptor)); +} + +static inline struct dvb_extended_event_item* + dvb_extended_event_descriptor_items_next(struct dvb_extended_event_descriptor *d, + struct dvb_extended_event_item *pos) +{ + struct dvb_extended_event_item_part2* part2 = + dvb_extended_event_item_part2(pos); + uint8_t *end = (uint8_t*) d + sizeof(struct dvb_extended_event_descriptor) + d->length_of_items; + uint8_t *next = (uint8_t *) part2 + + sizeof(struct dvb_extended_event_item_part2) + + part2->item_length; + + if (next >= end) + return NULL; + + return (struct dvb_extended_event_item *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3