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/teletext_descriptor.h | 127 ++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 lib/libucsi/dvb/teletext_descriptor.h (limited to 'lib/libucsi/dvb/teletext_descriptor.h') diff --git a/lib/libucsi/dvb/teletext_descriptor.h b/lib/libucsi/dvb/teletext_descriptor.h new file mode 100644 index 0000000..424c1cb --- /dev/null +++ b/lib/libucsi/dvb/teletext_descriptor.h @@ -0,0 +1,127 @@ +/* + * 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_TELETEXT_DESCRIPTOR +#define _UCSI_DVB_TELETEXT_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include +#include + +/** + * Possible values for the type field. + */ +enum { + DVB_TELETEXT_TYPE_INITIAL = 0x01, + DVB_TELETEXT_TYPE_SUBTITLE = 0x02, + DVB_TELETEXT_TYPE_ADDITIONAL = 0x03, + DVB_TELETEXT_TYPE_SCHEDULE = 0x04, + DVB_TELETEXT_TYPE_SUBTITLE_HEARING_IMPAIRED= 0x05, +}; + +/** + * dvb_teletext_descriptor structure. + */ +struct dvb_teletext_descriptor { + struct descriptor d; + + /* struct dvb_teletext_entry entries[] */ +} __ucsi_packed; + +/** + * An entry in the entries field of a dvb_teletext_descriptor. + */ +struct dvb_teletext_entry { + iso639lang_t language_code; + EBIT2(uint8_t type : 5; , + uint8_t magazine_number: 3; ); + uint8_t page_number; +} __ucsi_packed; + +/** + * Process a dvb_teletext_descriptor. + * + * @param d Generic descriptor. + * @return dvb_teletext_descriptor pointer, or NULL on error. + */ +static inline struct dvb_teletext_descriptor* + dvb_teletext_descriptor_codec(struct descriptor* d) +{ + if (d->len % sizeof(struct dvb_teletext_entry)) + return NULL; + + return (struct dvb_teletext_descriptor*) d; +} + +/** + * Iterator for entries field of a dvb_teletext_descriptor. + * + * @param d dvb_teletext_descriptor pointer. + * @param pos Variable holding a pointer to the current dvb_teletext_entry. + */ +#define dvb_teletext_descriptor_entries_for_each(d, pos) \ + for ((pos) = dvb_teletext_descriptor_entries_first(d); \ + (pos); \ + (pos) = dvb_teletext_descriptor_entries_next(d, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_teletext_entry* + dvb_teletext_descriptor_entries_first(struct dvb_teletext_descriptor *d) +{ + if (d->d.len == 0) + return NULL; + + return (struct dvb_teletext_entry *) + ((uint8_t*) d + sizeof(struct dvb_teletext_descriptor)); +} + +static inline struct dvb_teletext_entry* + dvb_teletext_descriptor_entries_next(struct dvb_teletext_descriptor *d, + struct dvb_teletext_entry *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_teletext_entry); + + if (next >= end) + return NULL; + + return (struct dvb_teletext_entry *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3