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/types.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 lib/libucsi/atsc/types.c (limited to 'lib/libucsi/atsc/types.c') diff --git a/lib/libucsi/atsc/types.c b/lib/libucsi/atsc/types.c new file mode 100644 index 0000000..8f4b7ea --- /dev/null +++ b/lib/libucsi/atsc/types.c @@ -0,0 +1,71 @@ +/* + * section and descriptor parser + * + * 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 +#include "libucsi/atsc/types.h" + +/* GPS epoch == unix time_t at 06/Jan/1980 */ +#define GPS_EPOCH 315964800 + + +int atsc_text_validate(uint8_t *buf, int len) +{ + int i; + int j; + int number_strings; + int number_segments; + int number_bytes; + int pos = 0; + + if (len == 0) + return 0; + number_strings = buf[pos]; + pos++; + + for(i=0; i< number_strings; i++) { + if (len < (pos+4)) + return -1; + number_segments = buf[pos+3]; + pos+=4; + + for(j=0; j < number_segments; j++) { + if (len < (pos+3)) + return -1; + number_bytes = buf[pos+2]; + pos+=3; + + if (len < (pos + number_bytes)) + return -1; + pos += number_bytes; + } + } + + return 0; +} + +time_t atsctime_to_unixtime(atsctime_t atsc) +{ + return atsc + GPS_EPOCH; +} + +atsctime_t unixtime_to_atsctime(time_t t) +{ + return t - GPS_EPOCH; +} -- cgit v1.2.3