1 files changed, 173 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/sit_section.h b/lib/libucsi/dvb/sit_section.h
new file mode 100644
index 0000000..e06d596
--- /dev/null
+++ b/lib/libucsi/dvb/sit_section.h
@@ -0,0 +1,173 @@
+/*
+ * 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_SIT_SECTION_H
+#define _UCSI_DVB_SIT_SECTION_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/section.h>
+
+/**
+ * dvb_sit_section structure.
+ */
+struct dvb_sit_section {
+	struct section_ext head;
+
+  EBIT2(uint16_t reserved			: 4; ,
+	uint16_t transmission_info_loop_length  :12; );
+	/* struct descriptor descriptors[] */
+	/* struct dvb_sit_service services[] */
+};
+
+/**
+ * An entry in the services field of a dvb_sit_section.
+ */
+struct dvb_sit_service {
+	uint16_t service_id;
+  EBIT3(uint16_t reserved		: 1; ,
+	uint16_t running_status		: 3; ,
+	uint16_t service_loop_length    :12; );
+	/* struct descriptor descriptors[] */
+};
+
+/**
+ * Process a dvb_sit_section.
+ *
+ * @param section Generic section_ext structure.
+ * @return dvb_sit_section pointer, or NULL on error.
+ */
+struct dvb_sit_section * dvb_sit_section_codec(struct section_ext *section);
+
+/**
+ * Iterator for descriptors field in a dvb_sit_section.
+ *
+ * @param sit dvb_sit_section Pointer.
+ * @param pos Variable holding pointer to current descriptor.
+ */
+#define dvb_sit_section_descriptors_for_each(sit, pos) \
+	for ((pos) = dvb_sit_section_descriptors_first(sit); \
+	     (pos); \
+	     (pos) = dvb_sit_section_descriptors_first(sit))
+
+/**
+ * Iterator for services field in a dvb_sit_section.
+ *
+ * @param sit dvb_sit_section Pointer.
+ * @param pos Variable holding pointer to current dvb_sit_service.
+ */
+#define dvb_sit_section_services_for_each(sit, pos) \
+	for ((pos) = dvb_sit_section_services_first(sit); \
+	     (pos); \
+	     (pos) = dvb_sit_section_services_next(sit, pos))
+
+/**
+ * Iterator for descriptors field in a dvb_sit_service.
+ *
+ * @param service dvb_sit_service Pointer.
+ * @param pos Variable holding pointer to current descriptor.
+ */
+#define dvb_sit_service_descriptors_for_each(service, pos) \
+	for ((pos) = dvb_sit_service_descriptors_first(service); \
+	     (pos); \
+	     (pos) = dvb_sit_service_descriptors_next(service, pos))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct descriptor *
+	dvb_sit_section_descriptors_first(struct dvb_sit_section *sit)
+{
+	if (sit->transmission_info_loop_length == 0)
+		return NULL;
+
+	return (struct descriptor *)
+			((uint8_t *) sit + sizeof(struct dvb_sit_section));
+}
+
+static inline struct descriptor *
+	dvb_sit_section_descriptors_next(struct dvb_sit_section *sit,
+					 struct descriptor* pos)
+{
+	return next_descriptor((uint8_t*) sit + sizeof(struct dvb_sit_section),
+			       sit->transmission_info_loop_length,
+			       pos);
+}
+
+static inline struct dvb_sit_service *
+	dvb_sit_section_services_first(struct dvb_sit_section *sit)
+{
+	size_t pos = sizeof(struct dvb_sit_section) + sit->transmission_info_loop_length;
+
+	if (pos >= section_ext_length(&sit->head))
+		return NULL;
+
+	return (struct dvb_sit_service*) ((uint8_t *) sit + pos);
+}
+
+static inline struct dvb_sit_service *
+	dvb_sit_section_services_next(struct dvb_sit_section *sit,
+				      struct dvb_sit_service *pos)
+{
+	uint8_t *end = (uint8_t*) sit + section_ext_length(&sit->head);
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct dvb_sit_service) +
+			pos->service_loop_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_sit_service *) next;
+}
+
+static inline struct descriptor *
+	dvb_sit_service_descriptors_first(struct dvb_sit_service * t)
+{
+	if (t->service_loop_length == 0)
+		return NULL;
+
+	return (struct descriptor *)
+			((uint8_t *) t + sizeof(struct dvb_sit_service));
+}
+
+static inline struct descriptor *
+	dvb_sit_service_descriptors_next(struct dvb_sit_service *t,
+					 struct descriptor* pos)
+{
+	return next_descriptor((uint8_t*) t + sizeof(struct dvb_sit_service),
+			       t->service_loop_length,
+			       pos);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif