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/atsc/mgt_section.c | 76 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 lib/libucsi/atsc/mgt_section.c (limited to 'lib/libucsi/atsc/mgt_section.c') diff --git a/lib/libucsi/atsc/mgt_section.c b/lib/libucsi/atsc/mgt_section.c new file mode 100644 index 0000000..bc6b3f2 --- /dev/null +++ b/lib/libucsi/atsc/mgt_section.c @@ -0,0 +1,76 @@ +/* + * 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 + */ + +#include + +struct atsc_mgt_section *atsc_mgt_section_codec(struct atsc_section_psip *psip) +{ + uint8_t * buf = (uint8_t *) psip; + size_t pos = sizeof(struct atsc_section_psip); + size_t len = section_ext_length(&(psip->ext_head)); + struct atsc_mgt_section *mgt = (struct atsc_mgt_section *) psip; + int i; + + if (len < sizeof(struct atsc_mgt_section)) + return NULL; + + bswap16(buf + pos); + pos += 2; + + // we cannot use the tables_defined value here because of the braindead ATSC spec! + for(i=0; i < mgt->tables_defined; i++) { + // we think we're still in the tables - process as normal + if ((pos + sizeof(struct atsc_mgt_table)) > len) + return NULL; + struct atsc_mgt_table *table = (struct atsc_mgt_table *) (buf+pos); + + bswap16(buf+pos); + bswap16(buf+pos+2); + bswap32(buf+pos+5); + bswap16(buf+pos+9); + + pos += sizeof(struct atsc_mgt_table); + if ((pos + table->table_type_descriptors_length) > len) + return NULL; + if (verify_descriptors(buf + pos, table->table_type_descriptors_length)) + return NULL; + + pos += table->table_type_descriptors_length; + } + + if ((pos + sizeof(struct atsc_mgt_section_part2)) > len) + return NULL; + struct atsc_mgt_section_part2 *part2 = (struct atsc_mgt_section_part2 *) (buf+pos); + + bswap16(buf+pos); + + pos += sizeof(struct atsc_mgt_section_part2); + if ((pos + part2->descriptors_length) > len) + return NULL; + if (verify_descriptors(buf + pos, part2->descriptors_length)) + return NULL; + pos += part2->descriptors_length; + + if (pos != len) + return NULL; + + return (struct atsc_mgt_section *) psip; +} -- cgit v1.2.3