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author | Mark Purcell <msp@debian.org> | 2008-06-22 11:00:40 +1000 |
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committer | etobi <git@e-tobi.net> | 2013-09-03 09:48:42 +0200 |
commit | 891c51ff368ed700dec6025eeb47ce4d96f76418 (patch) | |
tree | 3729664829e4faa691d403274f38eb10890b533c /lib/libucsi/atsc/eit_section.h | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-a966623153d5c69ef156542.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to 'lib/libucsi/atsc/eit_section.h')
-rw-r--r-- | lib/libucsi/atsc/eit_section.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/lib/libucsi/atsc/eit_section.h b/lib/libucsi/atsc/eit_section.h new file mode 100644 index 0000000..84bef16 --- /dev/null +++ b/lib/libucsi/atsc/eit_section.h @@ -0,0 +1,191 @@ +/* + * 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_ATSC_EIT_SECTION_H +#define _UCSI_ATSC_EIT_SECTION_H 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/atsc/section.h> +#include <libucsi/atsc/types.h> + +/** + * atsc_eit_section structure. + */ +struct atsc_eit_section { + struct atsc_section_psip head; + + uint8_t num_events_in_section; + /* struct atsc_eit_event events[] */ +} __ucsi_packed; + +struct atsc_eit_event { + EBIT2(uint16_t reserved : 2; , + uint16_t event_id :14; ); + atsctime_t start_time; + EBIT4(uint32_t reserved1 : 2; , + uint32_t ETM_location : 2; , + uint32_t length_in_seconds :20; , + uint32_t title_length : 8; ); + /* struct atsc_text title_text */ + /* struct atsc_eit_event_part2 part2 */ +} __ucsi_packed; + +struct atsc_eit_event_part2 { + EBIT2(uint16_t reserved : 4; , + uint16_t descriptors_length :12; ); + /* struct descriptor descriptors[] */ +} __ucsi_packed; + + +/** + * Process a atsc_eit_section. + * + * @param section Pointer to an atsc_section_psip structure. + * @return atsc_eit_section pointer, or NULL on error. + */ +struct atsc_eit_section *atsc_eit_section_codec(struct atsc_section_psip *section); + +/** + * Accessor for the source_id field of an EIT. + * + * @param eit EIT pointer. + * @return The source_id . + */ +static inline uint16_t atsc_eit_section_source_id(struct atsc_eit_section *eit) +{ + return eit->head.ext_head.table_id_ext; +} + +/** + * Iterator for the events field in an atsc_eit_section. + * + * @param eit atsc_eit_section pointer. + * @param pos Variable containing a pointer to the current atsc_eit_event. + * @param idx Integer used to count which event we are in. + */ +#define atsc_eit_section_events_for_each(eit, pos, idx) \ + for ((pos) = atsc_eit_section_events_first(eit), idx=0; \ + (pos); \ + (pos) = atsc_eit_section_events_next(eit, pos, ++idx)) + +/** + * Accessor for the title_text field of an atsc_eit_event. + * + * @param event atsc_eit_event pointer. + * @return struct atsc_text pointer, or NULL on error. + */ +static inline struct atsc_text *atsc_eit_event_name_title_text(struct atsc_eit_event *event) +{ + if (event->title_length == 0) + return NULL; + + return (struct atsc_text*)(((uint8_t*) event) + sizeof(struct atsc_eit_event)); +} + +/** + * Accessor for the part2 field of an atsc_eit_event. + * + * @param event atsc_eit_event pointer. + * @return struct atsc_eit_event_part2 pointer. + */ +static inline struct atsc_eit_event_part2 *atsc_eit_event_part2(struct atsc_eit_event *event) +{ + return (struct atsc_eit_event_part2 *) + (((uint8_t*) event) + sizeof(struct atsc_eit_event) + event->title_length); +} + +/** + * Iterator for the descriptors field in a atsc_eit_section structure. + * + * @param part2 atsc_eit_event_part2 pointer. + * @param pos Variable containing a pointer to the current descriptor. + */ +#define atsc_eit_event_part2_descriptors_for_each(part2, pos) \ + for ((pos) = atsc_eit_event_part2_descriptors_first(part2); \ + (pos); \ + (pos) = atsc_eit_event_part2_descriptors_next(part2, pos)) + + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct atsc_eit_event * + atsc_eit_section_events_first(struct atsc_eit_section *eit) +{ + size_t pos = sizeof(struct atsc_eit_section); + + if (eit->num_events_in_section == 0) + return NULL; + + return (struct atsc_eit_event*) (((uint8_t *) eit) + pos); +} + +static inline struct atsc_eit_event * + atsc_eit_section_events_next(struct atsc_eit_section *eit, + struct atsc_eit_event *pos, + int idx) +{ + if (idx >= eit->num_events_in_section) + return NULL; + + struct atsc_eit_event_part2 *part2 = atsc_eit_event_part2(pos); + int len = sizeof(struct atsc_eit_event_part2); + len += part2->descriptors_length; + + return (struct atsc_eit_event *) (((uint8_t*) part2) + len); +} + +static inline struct descriptor * + atsc_eit_event_part2_descriptors_first(struct atsc_eit_event_part2 *part2) +{ + size_t pos = sizeof(struct atsc_eit_event_part2); + + if (part2->descriptors_length == 0) + return NULL; + + return (struct descriptor*) (((uint8_t *) part2) + pos); +} + +static inline struct descriptor * + atsc_eit_event_part2_descriptors_next(struct atsc_eit_event_part2 *part2, + struct descriptor *pos) +{ + return next_descriptor((uint8_t*) part2 + sizeof(struct atsc_eit_event_part2), + part2->descriptors_length, + pos); +} + +#ifdef __cplusplus +} +#endif + +#endif |