1 files changed, 233 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/content_identifier_descriptor.h b/lib/libucsi/dvb/content_identifier_descriptor.h
new file mode 100644
index 0000000..c2cf9ea
--- /dev/null
+++ b/lib/libucsi/dvb/content_identifier_descriptor.h
@@ -0,0 +1,233 @@
+/*
+ * 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_CONTENT_IDENTIFIER_DESCRIPTOR
+#define _UCSI_DVB_CONTENT_IDENTIFIER_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+#include <libucsi/types.h>
+
+
+/**
+ * Possible values for the crid_type.
+ */
+enum {
+	DVB_CRID_TYPE_NONE		= 0x00,
+	DVB_CRID_TYPE_ITEM		= 0x01,
+	DVB_CRID_TYPE_SERIES		= 0x02,
+	DVB_CRID_TYPE_RECOMMENDATION	= 0x03,
+};
+
+/**
+ * Possible values for the crid_location.
+ */
+enum {
+	DVB_CRID_LOCATION_THIS_DESCRIPTOR	= 0x00,
+	DVB_CRID_LOCATION_CIT			= 0x01,
+};
+
+/**
+ * dvb_content_identifier_descriptor structure.
+ */
+struct dvb_content_identifier_descriptor {
+	struct descriptor d;
+
+	/* struct dvb_content_identifier_entry entries[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the entries field of a dvb_content_identifier_descriptor.
+ */
+struct dvb_content_identifier_entry {
+  EBIT2(uint8_t crid_type		: 6; ,
+	uint8_t crid_location		: 2; );
+	/* struct dvb_content_identifier_data_00 data0 */
+	/* struct dvb_content_identifier_data_01 data1 */
+} __ucsi_packed;
+
+/**
+ * The data if crid_location == 0
+ */
+struct dvb_content_identifier_entry_data_0 {
+	uint8_t crid_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * The data if crid_location == 1
+ */
+struct dvb_content_identifier_entry_data_1 {
+	uint16_t crid_ref;
+} __ucsi_packed;
+
+
+/**
+ * Process a dvb_content_identifier_descriptor.
+ *
+ * @param d Generic descriptor.
+ * @return dvb_content_identifier_descriptor pointer, or NULL on error.
+ */
+static inline struct dvb_content_identifier_descriptor*
+	dvb_content_identifier_descriptor_codec(struct descriptor* d)
+{
+	uint32_t len = d->len + 2;
+	uint32_t pos = 2;
+	uint8_t *buf = (uint8_t*) d;
+
+	while(pos < len) {
+		struct dvb_content_identifier_entry *e =
+			(struct dvb_content_identifier_entry*) (buf + pos);
+
+		if (len < (pos+1))
+			return NULL;
+		pos++;
+
+		switch(e->crid_location) {
+		case 0:
+			if (len < (pos + 1))
+				return NULL;
+			if (len < (pos + 1 + buf[pos]))
+				return NULL;
+			pos += 1 + buf[pos];
+			break;
+
+		case 1:
+			if (len < (pos+2))
+				return NULL;
+			bswap16(buf+pos);
+			break;
+		}
+	}
+
+	if (pos != len)
+		return NULL;
+
+	return (struct dvb_content_identifier_descriptor*) d;
+}
+
+/**
+ * Iterator for entries field of a dvb_content_identifier_descriptor.
+ *
+ * @param d dvb_content_identifier_descriptor pointer.
+ * @param pos Variable holding a pointer to the current dvb_content_identifier_entry.
+ */
+#define dvb_content_identifier_descriptor_entries_for_each(d, pos) \
+	for ((pos) = dvb_content_identifier_descriptor_entries_first(d); \
+	     (pos); \
+	     (pos) = dvb_content_identifier_descriptor_entries_next(d, pos))
+
+/**
+ * Accessor for the data0 field of a dvb_content_identifier_entry.
+ *
+ * @param d dvb_content_identifier_entry pointer.
+ * @return Pointer, or NULL on error.
+ */
+static inline struct dvb_content_identifier_entry_data_0*
+	dvb_content_identifier_entry_data_0(struct dvb_content_identifier_entry *d)
+{
+	if (d->crid_location != 0)
+		return NULL;
+	return (struct dvb_content_identifier_entry_data_0*)
+		((uint8_t*) d + sizeof(struct dvb_content_identifier_entry));
+}
+/**
+ * Accessor for the data field of a dvb_content_identifier_entry_data_0.
+ *
+ * @param d dvb_content_identifier_entry_data_0 pointer.
+ * @return Pointer, or NULL on error.
+ */
+static inline uint8_t*
+	dvb_content_identifier_entry_data_0_data(struct dvb_content_identifier_entry_data_0 *d)
+{
+	return ((uint8_t*) d + sizeof(struct dvb_content_identifier_entry_data_0));
+}
+
+/**
+ * Accessor for the data1 field of a dvb_content_identifier_entry.
+ *
+ * @param d dvb_content_identifier_entry pointer.
+ * @return Pointer, or NULL on error.
+ */
+static inline struct dvb_content_identifier_entry_data_1*
+	dvb_content_identifier_entry_data_1(struct dvb_content_identifier_entry *d)
+{
+	if (d->crid_location != 1)
+		return NULL;
+	return (struct dvb_content_identifier_entry_data_1*)
+		((uint8_t*) d + sizeof(struct dvb_content_identifier_entry));
+}
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_content_identifier_entry*
+	dvb_content_identifier_descriptor_entries_first(struct dvb_content_identifier_descriptor *d)
+{
+	if (d->d.len == 0)
+		return NULL;
+
+	return (struct dvb_content_identifier_entry *)
+		((uint8_t*) d + sizeof(struct dvb_content_identifier_descriptor));
+}
+
+static inline struct dvb_content_identifier_entry*
+	dvb_content_identifier_descriptor_entries_next(struct dvb_content_identifier_descriptor *d,
+					     struct dvb_content_identifier_entry *pos)
+{
+	uint8_t *end = (uint8_t*) d + 2 + d->d.len;
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct dvb_content_identifier_entry);
+
+	if (next >= end)
+		return NULL;
+
+	switch(pos->crid_location) {
+	case 0:
+		if ((next+2) >= end)
+			return NULL;
+		if ((next+2+next[1]) >= end)
+			return NULL;
+		break;
+
+	case 1:
+		if ((next+3) >= end)
+			return NULL;
+		break;
+	}
+
+	return (struct dvb_content_identifier_entry*) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif