1 files changed, 480 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/linkage_descriptor.h b/lib/libucsi/dvb/linkage_descriptor.h
new file mode 100644
index 0000000..d2be789
--- /dev/null
+++ b/lib/libucsi/dvb/linkage_descriptor.h
@@ -0,0 +1,480 @@
+/*
+ * 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_LINKAGE_DESCRIPTOR
+#define _UCSI_DVB_LINKAGE_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+#include <libucsi/types.h>
+
+/**
+ * Possible values for linkage_type.
+ */
+enum {
+	DVB_LINKAGE_TYPE_INFORMATION			= 0x01,
+	DVB_LINKAGE_TYPE_EPG				= 0x02,
+	DVB_LINKAGE_TYPE_CA_REPLACEMENT			= 0x03,
+	DVB_LINKAGE_TYPE_TS_WITH_BAT_NIT		= 0x04,
+	DVB_LINKAGE_TYPE_SERVICE_REPLACMENT		= 0x05,
+	DVB_LINKAGE_TYPE_DATA_BCAST			= 0x06,
+	DVB_LINKAGE_TYPE_RCS_MAP			= 0x07,
+	DVB_LINKAGE_TYPE_MOBILE_HANDOVER		= 0x08,
+	DVB_LINKAGE_TYPE_SOFTWARE_UPDATE		= 0x09,
+	DVB_LINKAGE_TYPE_TS_WITH_SSU_BAT_NIT		= 0x0a,
+	DVB_LINKAGE_TYPE_IP_MAC_NOTIFICATION		= 0x0b,
+	DVB_LINKAGE_TYPE_TS_WITH_INT_BAT_NIT		= 0x0c,
+};
+
+/**
+ * Possible values for hand_over_type.
+ */
+enum {
+	DVB_HAND_OVER_TYPE_IDENTICAL_NEIGHBOURING_COUNTRY	= 0x01,
+	DVB_HAND_OVER_TYPE_LOCAL_VARIATION			= 0x02,
+	DVB_HAND_OVER_TYPE_ASSOCIATED_SERVICE			= 0x03,
+};
+
+/**
+ * Possible values for origin_type.
+ */
+enum {
+	DVB_ORIGIN_TYPE_NIT				= 0x00,
+	DVB_ORIGIN_TYPE_SDT				= 0x01,
+};
+
+/**
+ * dvb_linkage_descriptor structure.
+ */
+struct dvb_linkage_descriptor {
+	struct descriptor d;
+
+	uint16_t transport_stream_id;
+	uint16_t original_network_id;
+	uint16_t service_id;
+	uint8_t linkage_type;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * Data for a linkage_type of 0x08.
+ */
+struct dvb_linkage_data_08 {
+  EBIT3(uint8_t hand_over_type		: 4;  ,
+	uint8_t reserved		: 3;  ,
+	uint8_t origin_type		: 1;  );
+	/* uint16_t network_id if hand_over_type == 1,2,3 */
+	/* uint16_t initial_service_id if origin_type = 0 */
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * Data for an linkage_type of 0x0b (IP/MAC Notification Table).
+ */
+struct dvb_linkage_data_0b {
+	uint8_t platform_id_data_length;
+	/* struct platform_id ids[] */
+} __ucsi_packed;
+
+/**
+ * Entries in the ids field of a dvb_linkage_data_0b.
+ */
+struct dvb_platform_id {
+  EBIT2(uint32_t platform_id			: 24; ,
+	uint8_t platform_name_loop_length	: 8;  );
+	/* struct platform_name names[] */
+} __ucsi_packed;
+
+/**
+ * Entries in the names field of a dvb_platform_id.
+ */
+struct dvb_platform_name {
+	iso639lang_t language_code;
+	uint8_t platform_name_length;
+	/* uint8_t text[] */
+} __ucsi_packed;
+
+/**
+ * Data for a linkage_type of 0x0c (IP/MAC Notification Table).
+ */
+struct dvb_linkage_data_0c {
+	uint8_t table_type;
+	/* uint16_t bouquet_id if table_type == 0x02 */
+} __ucsi_packed;
+
+
+/**
+ * Process a dvb_linkage_descriptor.
+ *
+ * @param d Generic descriptor pointer.
+ * @return dvb_linkage_descriptor pointer, or NULL on error.
+ */
+static inline struct dvb_linkage_descriptor*
+	dvb_linkage_descriptor_codec(struct descriptor* d)
+{
+	uint32_t pos = 0;
+	uint8_t* buf = (uint8_t*) d + 2;
+	uint32_t len = d->len;
+	struct dvb_linkage_descriptor *p =
+		(struct dvb_linkage_descriptor*) d;
+
+	if (len < (sizeof(struct dvb_linkage_descriptor) - 2))
+		return NULL;
+
+	bswap16(buf);
+	bswap16(buf+2);
+	bswap16(buf+4);
+
+	pos += sizeof(struct dvb_linkage_descriptor) - 2;
+
+	if (p->linkage_type == 0x08) {
+		struct dvb_linkage_data_08 *d08;
+
+		if ((len - pos) < sizeof(struct dvb_linkage_data_08))
+			return NULL;
+		d08 = (struct dvb_linkage_data_08 *) (buf+pos);
+		pos += sizeof(struct dvb_linkage_data_08);
+
+		switch(d08->hand_over_type) {
+		case 1:
+		case 2:
+		case 3:
+			if ((len - pos) < 2)
+				return NULL;
+			bswap16(buf+pos);
+			pos += 2;
+			break;
+		}
+		if (d08->origin_type == 0) {
+			if ((len - pos) < 2)
+				return NULL;
+			bswap16(buf+pos);
+			pos+=2;
+		}
+
+	} else if (p->linkage_type == 0x0b) {
+		uint32_t pos2=0;
+		struct dvb_linkage_data_0b *l_0b = (struct dvb_linkage_data_0b *) (buf + pos);
+
+		if ((len - pos) < sizeof(struct dvb_linkage_data_0b))
+			return NULL;
+
+		pos += sizeof(struct dvb_linkage_data_0b);
+		if ((len - pos) < l_0b->platform_id_data_length)
+			return NULL;
+
+		while (pos2 < l_0b->platform_id_data_length) {
+			bswap32(buf + pos + pos2);
+
+			struct dvb_platform_id *p_id = (struct dvb_platform_id *) (buf + pos + pos2);
+			if ((len - pos - pos2) < p_id->platform_name_loop_length)
+				return NULL;
+
+			pos2 += sizeof(struct dvb_platform_id) + p_id->platform_name_loop_length;
+		}
+
+		pos += pos2;
+	} else if (p->linkage_type == 0x0c) {
+		struct dvb_linkage_data_0c *l_0c = (struct dvb_linkage_data_0c *) (buf + pos);
+
+		if ((len - pos) < sizeof(struct dvb_linkage_data_0c))
+			return NULL;
+		pos += sizeof(struct dvb_linkage_data_0c);
+
+		if (l_0c->table_type == 0x02) {
+			if ((len - pos) < 2)
+				return NULL;
+			bswap16(buf+pos);
+		}
+	}
+
+	return (struct dvb_linkage_descriptor*) d;
+}
+
+/**
+ * Accessor for the data field of a dvb_linkage_descriptor.
+ *
+ * @param d dvb_linkage_descriptor pointer.
+ * @return Pointer to the data field.
+ */
+static inline uint8_t *
+	dvb_linkage_descriptor_data(struct dvb_linkage_descriptor *d)
+{
+	return (uint8_t *) d + sizeof(struct dvb_linkage_descriptor);
+}
+
+/**
+ * Determine the length of the data field of a dvb_linkage_descriptor.
+ *
+ * @param d dvb_linkage_descriptor pointer.
+ * @return Length of the field in bytes.
+ */
+static inline int
+	dvb_linkage_descriptor_data_length(struct dvb_linkage_descriptor *d)
+{
+	return d->d.len - 7;
+}
+
+/**
+ * Accessor for a dvb_linkage_data_08 pointer.
+ *
+ * @param d dvb_linkage_descriptor pointer.
+ * @return Pointer to the data field.
+ */
+static inline struct dvb_linkage_data_08 *
+	dvb_linkage_data_08(struct dvb_linkage_descriptor *d)
+{
+	if (d->linkage_type != 0x08)
+		return NULL;
+	return (struct dvb_linkage_data_08 *) dvb_linkage_descriptor_data(d);
+}
+
+/**
+ * Accessor for the network_id field of a dvb_linkage_data_08.
+ *
+ * @param d dvb_linkage_descriptor pointer
+ * @param d08 dvb_linkage_data_08 pointer.
+ * @return network_id, or -1 if not present
+ */
+static inline int
+	dvb_linkage_data_08_network_id(struct dvb_linkage_descriptor *d, struct dvb_linkage_data_08 *d08)
+{
+	if (d->linkage_type != 0x08)
+		return -1;
+
+	switch(d08->hand_over_type) {
+	case 1:
+	case 2:
+	case 3:
+		return *((uint16_t*) ((uint8_t*) d08 + sizeof(struct dvb_linkage_data_08)));
+	}
+
+	return -1;
+}
+
+/**
+ * Accessor for the initial_service_id field of a dvb_linkage_data_08.
+ *
+ * @param d dvb_linkage_descriptor pointer
+ * @param d08 dvb_linkage_data_08 pointer.
+ * @return initial_service_id, or -1 if not present
+ */
+static inline int
+	dvb_linkage_data_08_initial_service_id(struct dvb_linkage_descriptor *d, struct dvb_linkage_data_08 *d08)
+{
+	uint8_t *pos;
+
+	if (d->linkage_type != 0x08)
+		return -1;
+	if (d08->origin_type != 0)
+		return -1;
+
+	pos = ((uint8_t*) d08) + sizeof(struct dvb_linkage_data_08);
+	switch(d08->hand_over_type) {
+	case 1:
+	case 2:
+	case 3:
+		pos +=2;
+		break;
+	}
+
+	return *((uint16_t*) pos);
+}
+
+/**
+ * Accessor for the data field of a dvb_linkage_data_08.
+ *
+ * @param d dvb_linkage_descriptor pointer
+ * @param d08 dvb_linkage_data_08 pointer.
+ * @param length Pointer to int destination for data length.
+ * @return Pointer to the data field, or NULL if invalid
+ */
+static inline uint8_t *
+	dvb_linkage_data_08_data(struct dvb_linkage_descriptor *d, struct dvb_linkage_data_08 *d08, int *length)
+{
+	uint8_t *pos;
+	int used = 0;
+
+	if (d->linkage_type != 0x08) {
+		*length = 0;
+		return NULL;
+	}
+
+	pos = ((uint8_t*) d08) + sizeof(struct dvb_linkage_data_08);
+	switch(d08->hand_over_type) {
+	case 1:
+	case 2:
+	case 3:
+		pos += 2;
+		used += 2;
+		break;
+	}
+	if (d08->origin_type == 0) {
+		pos+=2;
+		used+=2;
+	}
+
+	*length = dvb_linkage_descriptor_data_length(d) - (sizeof(struct dvb_linkage_data_08) + used);
+	return pos;
+}
+
+/**
+ * Accessor for a dvb_linkage_data_0b pointer.
+ *
+ * @param d dvb_linkage_descriptor pointer.
+ * @return Pointer to the data field.
+ */
+static inline struct dvb_linkage_data_0b *
+	dvb_linkage_data_0b(struct dvb_linkage_descriptor *d)
+{
+	if (d->linkage_type != 0x0b)
+		return NULL;
+	return (struct dvb_linkage_data_0b *) dvb_linkage_descriptor_data(d);
+}
+
+/**
+ * Iterator for the platform_id field of a dvb_linkage_data_0b.
+ *
+ * @param linkage dvb_linkage_data_0b pointer.
+ * @param pos Variable containing a pointer to the current dvb_platform_id.
+ */
+#define dvb_linkage_data_0b_platform_id_for_each(linkage, pos) \
+	for ((pos) = dvb_platform_id_first(linkage); \
+	     (pos); \
+	     (pos) = dvb_platform_id_next(linkage, pos))
+
+/**
+ * Iterator for the platform_name field of a dvb_platform_id.
+ *
+ * @param platid dvb_platform_id pointer.
+ * @param pos Variable containing a pointer to the current dvb_platform_name.
+ */
+#define dvb_platform_id_platform_name_for_each(platid, pos) \
+	for ((pos) = dvb_platform_name_first(platid); \
+	     (pos); \
+	     (pos) = dvb_platform_name_next(platid, pos))
+
+/**
+ * Accessor for the text field of a dvb_platform_name.
+ *
+ * @param p dvb_platform_name pointer.
+ * @return Pointer to the field.
+ */
+static inline uint8_t *
+	dvb_platform_name_text(struct dvb_platform_name *p)
+{
+	return (uint8_t *) p + sizeof(struct dvb_platform_name);
+}
+
+/**
+ * Accessor for a dvb_linkage_data_0c pointer.
+ *
+ * @param d dvb_linkage_descriptor pointer.
+ * @return Pointer to the data field.
+ */
+static inline struct dvb_linkage_data_0c *
+		dvb_linkage_data_0c(struct dvb_linkage_descriptor *d)
+{
+	if (d->linkage_type != 0x0c)
+		return NULL;
+	return (struct dvb_linkage_data_0c *) dvb_linkage_descriptor_data(d);
+}
+
+/**
+ * Accessor for the bouquet_id field of a dvb_linkage_data_0c if table_id == 0x02.
+ *
+ * @param l_0c dvb_linkage_data_0c pointer.
+ * @return The bouquet field, or -1 on error.
+ */
+static inline int
+	dvb_linkage_data_0c_bouquet_id(struct dvb_linkage_data_0c *l_0c)
+{
+	if (l_0c->table_type != 0x02)
+		return -1;
+
+	return *((uint16_t *) ((uint8_t*) l_0c + 1));
+}
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_platform_id *
+	dvb_platform_id_first(struct dvb_linkage_data_0b *d)
+{
+	if (d->platform_id_data_length == 0)
+		return NULL;
+
+	return (struct dvb_platform_id *) ((uint8_t *) d + sizeof(struct dvb_linkage_data_0b));
+}
+
+static inline struct dvb_platform_id *
+	dvb_platform_id_next(struct dvb_linkage_data_0b *d,
+				    struct dvb_platform_id *pos)
+{
+	uint8_t *end = (uint8_t *) d + d->platform_id_data_length;
+	uint8_t *next =	(uint8_t *) pos +
+			sizeof(struct dvb_platform_id) +
+			pos->platform_name_loop_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_platform_id *) next;
+}
+
+static inline struct dvb_platform_name *
+	dvb_platform_name_first(struct dvb_platform_id *p)
+{
+	if (p->platform_name_loop_length == 0)
+		return NULL;
+
+	return (struct dvb_platform_name *) ((uint8_t *) p + sizeof(struct dvb_platform_id));
+}
+
+static inline struct dvb_platform_name *
+	dvb_platform_name_next(struct dvb_platform_id *p,
+				    struct dvb_platform_name *pos)
+{
+	uint8_t *end = (uint8_t *) p + p->platform_name_loop_length;
+	uint8_t *next =	(uint8_t *) pos +
+			sizeof(struct dvb_platform_name) +
+			pos->platform_name_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_platform_name *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif