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61 lines
1.7 KiB
61 lines
1.7 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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#include <libucsi/dvb/sdt_section.h>
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struct dvb_sdt_section * dvb_sdt_section_codec(struct section_ext * ext)
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{
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uint8_t * buf = (uint8_t *) ext;
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size_t pos = sizeof(struct section_ext);
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size_t len = section_ext_length(ext);
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if (len < sizeof(struct dvb_sdt_section))
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return NULL;
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bswap16(buf + pos);
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pos += 3;
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while (pos < len) {
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struct dvb_sdt_service * service =
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(struct dvb_sdt_service *)(buf + pos);
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if ((pos + sizeof(struct dvb_sdt_service)) > len)
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return NULL;
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bswap16(buf + pos);
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bswap16(buf + pos + 3);
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pos += sizeof(struct dvb_sdt_service);
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if ((pos + service->descriptors_loop_length) > len)
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return NULL;
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if (verify_descriptors(buf + pos, service->descriptors_loop_length))
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return NULL;
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pos += service->descriptors_loop_length;
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}
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if (pos != len)
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return NULL;
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return (struct dvb_sdt_section *) ext;
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}
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