1 files changed, 186 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/vbi_data_descriptor.h b/lib/libucsi/dvb/vbi_data_descriptor.h
new file mode 100644
index 0000000..b1d8703
--- /dev/null
+++ b/lib/libucsi/dvb/vbi_data_descriptor.h
@@ -0,0 +1,186 @@
+/*
+ * 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_VBI_DATA_DESCRIPTOR
+#define _UCSI_DVB_VBI_DATA_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+/**
+ * Possible values for the data_service_id field.
+ */
+enum {
+	DVB_VBI_DATA_SERVICE_ID_EBU		= 0x01,
+	DVB_VBI_DATA_SERVICE_ID_INVERTED	= 0x02,
+	DVB_VBI_DATA_SERVICE_ID_VPS		= 0x04,
+	DVB_VBI_DATA_SERVICE_ID_WSS		= 0x05,
+	DVB_VBI_DATA_SERVICE_ID_CC		= 0x06,
+	DVB_VBI_DATA_SERVICE_ID_MONO_422	= 0x07,
+};
+
+/**
+ * dvb_vbi_data_descriptor structure
+ */
+struct dvb_vbi_data_descriptor {
+	struct descriptor d;
+
+	/* struct dvb_vbi_data_entry entries[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the dvb_vbi_data_descriptor entries field.
+ */
+struct dvb_vbi_data_entry {
+	uint8_t data_service_id;
+	uint8_t data_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * Format of the dvb_vbi_data_entry data field, if data_service_id == 1,2,4,5,6,7.
+ */
+struct dvb_vbi_data_x {
+  EBIT3(uint8_t reserved 	: 2; ,
+	uint8_t field_parity 	: 1; ,
+	uint8_t line_offset	: 5; );
+} __ucsi_packed;
+
+/**
+ * Process a dvb_vbi_data_descriptor.
+ *
+ * @param d Generic descriptor structure.
+ * @return dvb_vbi_data_descriptor pointer, or NULL on error.
+ */
+static inline struct dvb_vbi_data_descriptor*
+	dvb_vbi_data_descriptor_codec(struct descriptor* d)
+{
+	uint8_t* p = (uint8_t*) d + 2;
+	uint32_t pos = 0;
+	uint32_t len = d->len;
+
+	while(pos < len) {
+		struct dvb_vbi_data_entry *e =
+			(struct dvb_vbi_data_entry*) (p+pos);
+
+		pos += sizeof(struct dvb_vbi_data_entry);
+
+		if (pos > len)
+			return NULL;
+
+		pos += e->data_length;
+
+		if (pos > len)
+			return NULL;
+	}
+
+	return (struct dvb_vbi_data_descriptor*) d;
+}
+
+/**
+ * Iterator for entries field in a dvb_vbi_data_descriptor structure.
+ *
+ * @param d Pointer to dvb_vbi_data_descriptor structure.
+ * @param pos Variable holding pointer to the current dvb_vbi_data_entry structure.
+ */
+#define dvb_vbi_data_descriptor_entries_for_each(d, pos) \
+	for ((pos) = dvb_vbi_data_descriptor_entries_first(d); \
+	     (pos); \
+	     (pos) = dvb_vbi_data_descriptor_entries_next(d, pos))
+
+/**
+ * Get a pointer to the data field of a dvb_vbi_data_entry.
+ *
+ * @param d dvb_vbi_data_entry structure.
+ * @return Pointer to the data field.
+ */
+static inline uint8_t *
+	dvb_vbi_data_entry_data(struct dvb_vbi_data_entry *d)
+{
+	return (uint8_t *) d + sizeof(struct dvb_vbi_data_entry);
+}
+
+/**
+ * Get a pointer to the data field of a dvb_vbi_data_x for id 1,2,4,5,6,7.
+ *
+ * @param d dvb_vbi_data_entry structure.
+ * @return Pointer to the data field, or NULL if invalid
+ */
+static inline struct dvb_vbi_data_x*
+	dvb_vbi_data_entry_data_x(struct dvb_vbi_data_entry *d)
+{
+	switch(d->data_service_id) {
+	case 1:
+	case 2:
+	case 4:
+	case 5:
+	case 6:
+	case 7:
+		return (struct dvb_vbi_data_x*) ((uint8_t *) d + sizeof(struct dvb_vbi_data_entry));
+	}
+
+	return NULL;
+}
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_vbi_data_entry*
+	dvb_vbi_data_descriptor_entries_first(struct dvb_vbi_data_descriptor *d)
+{
+	if (d->d.len == 0)
+		return NULL;
+
+	return (struct dvb_vbi_data_entry *)
+		((uint8_t*) d + sizeof(struct dvb_vbi_data_descriptor));
+}
+
+static inline struct dvb_vbi_data_entry*
+	dvb_vbi_data_descriptor_entries_next(struct dvb_vbi_data_descriptor *d,
+					     struct dvb_vbi_data_entry *pos)
+{
+	uint8_t *end = (uint8_t*) d + 2 + d->d.len;
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct dvb_vbi_data_entry) +
+			pos->data_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_vbi_data_entry *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif