1 files changed, 81 insertions, 0 deletions
diff --git a/lib/libucsi/atsc/tvct_section.c b/lib/libucsi/atsc/tvct_section.c
new file mode 100644
index 0000000..d187414
--- /dev/null
+++ b/lib/libucsi/atsc/tvct_section.c
@@ -0,0 +1,81 @@
+/*
+ * 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 <libucsi/atsc/tvct_section.h>
+
+struct atsc_tvct_section *atsc_tvct_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));
+	int idx;
+	struct atsc_tvct_section *tvct = (struct atsc_tvct_section *) psip;
+
+	if (len < sizeof(struct atsc_tvct_section))
+		return NULL;
+
+	pos++;
+
+	for(idx =0; idx < tvct->num_channels_in_section; idx++) {
+
+		if ((pos + sizeof(struct atsc_tvct_channel)) > len)
+			return NULL;
+		struct atsc_tvct_channel *channel = (struct atsc_tvct_channel *) (buf+pos);
+
+		pos += 7*2;
+
+		bswap32(buf+pos);
+		bswap32(buf+pos+4);
+		bswap16(buf+pos+8);
+		bswap16(buf+pos+10);
+		bswap16(buf+pos+12);
+		bswap16(buf+pos+14);
+		bswap16(buf+pos+16);
+		pos+=18;
+
+		if ((pos + channel->descriptors_length) > len)
+			return NULL;
+		if (verify_descriptors(buf + pos, channel->descriptors_length))
+			return NULL;
+
+		pos += channel->descriptors_length;
+	}
+
+	if ((pos + sizeof(struct atsc_tvct_section_part2)) > len)
+		return NULL;
+	struct atsc_tvct_section_part2 *part2 = (struct atsc_tvct_section_part2 *) (buf+pos);
+
+	bswap16(buf+pos);
+	pos+=2;
+
+	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_tvct_section *) psip;
+}