1 files changed, 207 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/nit_section.h b/lib/libucsi/dvb/nit_section.h
new file mode 100644
index 0000000..77ab1a0
--- /dev/null
+++ b/lib/libucsi/dvb/nit_section.h
@@ -0,0 +1,207 @@
+/*
+ * 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_NIT_SECTION_H
+#define _UCSI_DVB_NIT_SECTION_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/section.h>
+
+/**
+ * dvb_nit_section structure.
+ */
+struct dvb_nit_section {
+	struct section_ext head;
+
+  EBIT2(uint16_t reserved_1			: 4; ,
+	uint16_t network_descriptors_length	:12; );
+	/* struct descriptor descriptors[] */
+	/* struct dvb_nit_section_part2 part2 */
+};
+
+/**
+ * Second part of a dvb_nit_section, following the variable length descriptors field.
+ */
+struct dvb_nit_section_part2 {
+  EBIT2(uint16_t reserved_2			: 4; ,
+	uint16_t transport_stream_loop_length	:12; );
+	/* struct dvb_nit_transport transports[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the transports field of a dvb_nit_section_part2
+ */
+struct dvb_nit_transport {
+	uint16_t transport_stream_id;
+	uint16_t original_network_id;
+  EBIT2(uint16_t reserved			: 4; ,
+	uint16_t transport_descriptors_length	:12; );
+	/* struct descriptor descriptors[] */
+} __ucsi_packed;
+
+/**
+ * Process a dvb_nit_section.
+ *
+ * @param section Generic section_ext pointer.
+ * @return dvb_nit_section pointer, or NULL on error.
+ */
+struct dvb_nit_section * dvb_nit_section_codec(struct section_ext *section);
+
+/**
+ * Accessor for the network_id field of a NIT.
+ *
+ * @param nit NIT pointer.
+ * @return The network_id.
+ */
+static inline uint16_t dvb_nit_section_network_id(struct dvb_nit_section *nit)
+{
+	return nit->head.table_id_ext;
+}
+
+/**
+ * Iterator over the descriptors field in a dvb_nit_section.
+ *
+ * @param nit dvb_nit_section pointer.
+ * @param pos Variable containing a pointer to the current descriptor.
+ */
+#define dvb_nit_section_descriptors_for_each(nit, pos) \
+	for ((pos) = dvb_nit_section_descriptors_first(nit); \
+	     (pos); \
+	     (pos) = dvb_nit_section_descriptors_next(nit, pos))
+
+/**
+ * Accessor for a pointer to the dvb_nit_section_part2 structure.
+ *
+ * @param nit dvb_nit_section pointer.
+ * @return dvb_nit_section_part2 pointer.
+ */
+static inline struct dvb_nit_section_part2 *dvb_nit_section_part2(struct dvb_nit_section * nit)
+{
+	return (struct dvb_nit_section_part2 *)
+		((uint8_t*) nit + sizeof(struct dvb_nit_section) +
+		 nit->network_descriptors_length);
+}
+
+/**
+ * Iterator over the transports field in a dvb_nit_section_part2.
+ *
+ * @param nit dvb_nit_section pointer.
+ * @param part2 dvb_nit_section_part2 pointer.
+ * @param pos Pointer to the current dvb_nit_transport.
+ */
+#define dvb_nit_section_transports_for_each(nit, part2, pos) \
+	for ((pos) = dvb_nit_section_transports_first(part2); \
+	     (pos); \
+	     (pos) = dvb_nit_section_transports_next(part2, pos))
+
+/**
+ * Iterator over the descriptors field in a dvb_nit_transport.
+ *
+ * @param transport dvb_nit_transport pointer.
+ * @param pos Pointer to the current descriptor.
+ */
+#define dvb_nit_transport_descriptors_for_each(transport, pos) \
+	for ((pos) = dvb_nit_transport_descriptors_first(transport); \
+	     (pos); \
+	     (pos) = dvb_nit_transport_descriptors_next(transport, pos))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct descriptor *
+	dvb_nit_section_descriptors_first(struct dvb_nit_section * nit)
+{
+	if (nit->network_descriptors_length == 0)
+		return NULL;
+
+	return (struct descriptor *)
+		((uint8_t *) nit + sizeof(struct dvb_nit_section));
+}
+
+static inline struct descriptor *
+	dvb_nit_section_descriptors_next(struct dvb_nit_section * nit,
+					 struct descriptor* pos)
+{
+	return next_descriptor((uint8_t*) nit + sizeof(struct dvb_nit_section),
+			      nit->network_descriptors_length,
+			      pos);
+}
+
+static inline struct dvb_nit_transport *
+	dvb_nit_section_transports_first(struct dvb_nit_section_part2 *part2)
+{
+	if (part2->transport_stream_loop_length == 0)
+		return NULL;
+
+	return (struct dvb_nit_transport *)
+		((uint8_t *)part2 + sizeof(struct dvb_nit_section_part2));
+}
+
+static inline struct dvb_nit_transport *
+	dvb_nit_section_transports_next(struct dvb_nit_section_part2 *part2,
+					struct dvb_nit_transport *pos)
+{
+	uint8_t *end = (uint8_t*) part2 + sizeof(struct dvb_nit_section_part2) +
+		part2->transport_stream_loop_length;
+	uint8_t *next = (uint8_t*) pos + sizeof(struct dvb_nit_transport) +
+		pos->transport_descriptors_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_nit_transport *) next;
+}
+
+static inline struct descriptor *
+	dvb_nit_transport_descriptors_first(struct dvb_nit_transport *t)
+{
+	if (t->transport_descriptors_length == 0)
+		return NULL;
+
+	return (struct descriptor *)
+		((uint8_t*) t + sizeof(struct dvb_nit_transport));
+}
+
+static inline struct descriptor *
+	dvb_nit_transport_descriptors_next(struct dvb_nit_transport *t,
+					   struct descriptor* pos)
+{
+	return next_descriptor((uint8_t*) t + sizeof(struct dvb_nit_transport),
+			      t->transport_descriptors_length,
+			      pos);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif