1 files changed, 127 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/teletext_descriptor.h b/lib/libucsi/dvb/teletext_descriptor.h
new file mode 100644
index 0000000..424c1cb
--- /dev/null
+++ b/lib/libucsi/dvb/teletext_descriptor.h
@@ -0,0 +1,127 @@
+/*
+ * 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_TELETEXT_DESCRIPTOR
+#define _UCSI_DVB_TELETEXT_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+#include <libucsi/types.h>
+
+/**
+ * Possible values for the type field.
+ */
+enum {
+	DVB_TELETEXT_TYPE_INITIAL		= 0x01,
+	DVB_TELETEXT_TYPE_SUBTITLE		= 0x02,
+	DVB_TELETEXT_TYPE_ADDITIONAL		= 0x03,
+	DVB_TELETEXT_TYPE_SCHEDULE		= 0x04,
+	DVB_TELETEXT_TYPE_SUBTITLE_HEARING_IMPAIRED= 0x05,
+};
+
+/**
+ * dvb_teletext_descriptor structure.
+ */
+struct dvb_teletext_descriptor {
+	struct descriptor d;
+
+	/* struct dvb_teletext_entry entries[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the entries field of a dvb_teletext_descriptor.
+ */
+struct dvb_teletext_entry {
+	iso639lang_t language_code;
+  EBIT2(uint8_t type		: 5; ,
+	uint8_t magazine_number: 3; );
+	uint8_t page_number;
+} __ucsi_packed;
+
+/**
+ * Process a dvb_teletext_descriptor.
+ *
+ * @param d Generic descriptor.
+ * @return dvb_teletext_descriptor pointer, or NULL on error.
+ */
+static inline struct dvb_teletext_descriptor*
+	dvb_teletext_descriptor_codec(struct descriptor* d)
+{
+	if (d->len % sizeof(struct dvb_teletext_entry))
+		return NULL;
+
+	return (struct dvb_teletext_descriptor*) d;
+}
+
+/**
+ * Iterator for entries field of a dvb_teletext_descriptor.
+ *
+ * @param d dvb_teletext_descriptor pointer.
+ * @param pos Variable holding a pointer to the current dvb_teletext_entry.
+ */
+#define dvb_teletext_descriptor_entries_for_each(d, pos) \
+	for ((pos) = dvb_teletext_descriptor_entries_first(d); \
+	     (pos); \
+	     (pos) = dvb_teletext_descriptor_entries_next(d, pos))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_teletext_entry*
+	dvb_teletext_descriptor_entries_first(struct dvb_teletext_descriptor *d)
+{
+	if (d->d.len == 0)
+		return NULL;
+
+	return (struct dvb_teletext_entry *)
+		((uint8_t*) d + sizeof(struct dvb_teletext_descriptor));
+}
+
+static inline struct dvb_teletext_entry*
+	dvb_teletext_descriptor_entries_next(struct dvb_teletext_descriptor *d,
+					     struct dvb_teletext_entry *pos)
+{
+	uint8_t *end = (uint8_t*) d + 2 + d->d.len;
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct dvb_teletext_entry);
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_teletext_entry *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif