1 files changed, 324 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/mosaic_descriptor.h b/lib/libucsi/dvb/mosaic_descriptor.h
new file mode 100644
index 0000000..6da1e95
--- /dev/null
+++ b/lib/libucsi/dvb/mosaic_descriptor.h
@@ -0,0 +1,324 @@
+/*
+ * 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_MOSAIC_DESCRIPTOR
+#define _UCSI_DVB_MOSAIC_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+/**
+ * dvb_mosaic_descriptor structure.
+ */
+struct dvb_mosaic_descriptor {
+	struct descriptor d;
+
+  EBIT4(uint8_t mosaic_entry_point		: 1; ,
+	uint8_t number_of_horiz_elementary_cells: 3; ,
+	uint8_t reserved			: 1; ,
+	uint8_t number_of_vert_elementary_cells	: 3; );
+	/* struct dvb_mosaic_info infos[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the infos field of a dvb_mosaic_descriptor.
+ */
+struct dvb_mosaic_info {
+  EBIT3(uint16_t logical_cell_id		: 6; ,
+	uint16_t reserved			: 7; ,
+	uint16_t logical_cell_presentation_info	: 3; );
+	uint8_t elementary_cell_field_length;
+	/* struct dvb_mosaic_elementary_cell_field fields[] */
+	/* struct dvb_mosaic_info_part2 part2 */
+	/* struct dvb_mosaic_linkage linkage */
+} __ucsi_packed;
+
+/**
+ * An entry in the fields field of a dvb_mosaic_info.
+ */
+struct dvb_mosaic_elementary_cell_field {
+  EBIT2(uint8_t reserved		: 2; ,
+	uint8_t elementary_cell_id	: 6; );
+} __ucsi_packed;
+
+/**
+ * Part2 of dvb_mosaic_info, following the variable length fields field.
+ */
+struct dvb_mosaic_info_part2 {
+	uint8_t cell_linkage_info;
+} __ucsi_packed;
+
+struct dvb_mosaic_linkage_01 {
+	uint16_t bouquet_id;
+} __ucsi_packed;
+
+struct dvb_mosaic_linkage_02 {
+	uint16_t original_network_id;
+	uint16_t transport_stream_id;
+	uint16_t service_id;
+} __ucsi_packed;
+
+struct dvb_mosaic_linkage_03 {
+	uint16_t original_network_id;
+	uint16_t transport_stream_id;
+	uint16_t service_id;
+} __ucsi_packed;
+
+struct dvb_mosaic_linkage_04 {
+	uint16_t original_network_id;
+	uint16_t transport_stream_id;
+	uint16_t service_id;
+	uint16_t event_id;
+} __ucsi_packed;
+
+/**
+ * Structure describing the linkage field of a dvb_mosaic_info
+ */
+struct dvb_mosaic_linkage {
+	union {
+		struct dvb_mosaic_linkage_01 linkage_01;
+		struct dvb_mosaic_linkage_02 linkage_02;
+		struct dvb_mosaic_linkage_03 linkage_03;
+		struct dvb_mosaic_linkage_04 linkage_04;
+	} u;
+} __ucsi_packed;
+
+/**
+ * Process a dvb_mosaic_descriptor.
+ *
+ * @param d Pointer to a generic descriptor structure.
+ */
+static inline struct dvb_mosaic_descriptor*
+	dvb_mosaic_descriptor_codec(struct descriptor* d)
+{
+	uint8_t* buf = (uint8_t*) d + 2;
+	uint32_t pos = 0;
+	uint32_t len = d->len;
+	struct dvb_mosaic_descriptor * p =
+		(struct dvb_mosaic_descriptor *) d;
+
+	pos += (sizeof(struct dvb_mosaic_descriptor) - 2);
+
+	if (pos > len)
+		return NULL;
+
+	while(pos < len) {
+		struct dvb_mosaic_info *e =
+			(struct dvb_mosaic_info*) (buf+pos);
+		struct dvb_mosaic_info_part2 *e2;
+		struct dvb_mosaic_linkage *linkage;
+
+		if ((pos + sizeof(struct dvb_mosaic_info)) > len)
+			return NULL;
+
+		bswap16(buf + pos);
+
+		pos += sizeof(struct dvb_mosaic_info) +
+			e->elementary_cell_field_length;
+
+		if (pos > len)
+			return NULL;
+
+		e2 = (struct dvb_mosaic_info_part2*) (buf+pos);
+
+		pos += sizeof(struct dvb_mosaic_info_part2);
+
+		if (pos > len)
+			return NULL;
+
+		linkage = (struct dvb_mosaic_linkage*) (buf+pos);
+
+		switch(e2->cell_linkage_info) {
+		case 0x01:
+			if ((pos + sizeof(struct dvb_mosaic_linkage_01)) > len)
+				return NULL;
+			bswap16(buf+pos);
+			pos += sizeof(struct dvb_mosaic_linkage_01);
+			break;
+
+		case 0x02:
+			if ((pos + sizeof(struct dvb_mosaic_linkage_02)) > len)
+				return NULL;
+			bswap16(buf+pos);
+			bswap16(buf+pos+2);
+			bswap16(buf+pos+4);
+			pos += sizeof(struct dvb_mosaic_linkage_02);
+			break;
+
+		case 0x03:
+			if ((pos + sizeof(struct dvb_mosaic_linkage_03)) > len)
+				return NULL;
+			bswap16(buf+pos);
+			bswap16(buf+pos+2);
+			bswap16(buf+pos+4);
+			pos += sizeof(struct dvb_mosaic_linkage_03);
+			break;
+
+		case 0x04:
+			if ((pos + sizeof(struct dvb_mosaic_linkage_04)) > len)
+				return NULL;
+			bswap16(buf+pos);
+			bswap16(buf+pos+2);
+			bswap16(buf+pos+4);
+			bswap16(buf+pos+6);
+			pos += sizeof(struct dvb_mosaic_linkage_04);
+			break;
+		}
+	}
+
+	return p;
+}
+
+/**
+ * Iterator over the infos field of a dvb_mosaic_descriptor.
+ *
+ * @param d dvb_mosaic_descriptor pointer.
+ * @param pos Variable containing a pointer to the current dvb_mosaic_info.
+ */
+#define dvb_mosaic_descriptor_infos_for_each(d, pos) \
+	for ((pos) = dvb_mosaic_descriptor_infos_first(d); \
+	     (pos); \
+	     (pos) = dvb_mosaic_descriptor_infos_next(d, pos))
+
+/**
+ * Iterator over the fields field of a dvb_mosaic_info.
+ *
+ * @param info dvb_mosaic_info pointer.
+ * @param pos Variable containing a pointer to the current dvb_mosaic_elementary_cell_field.
+ */
+#define dvb_mosaic_info_fields_for_each(info, pos) \
+	for ((pos) = dvb_mosaic_info_fields_first(info); \
+	     (pos); \
+	     (pos) = dvb_mosaic_info_fields_next(info, pos))
+
+/**
+ * Accessor for the second part of the dvb_mosaic_info structure.
+ *
+ * @param entry dvb_mosaic_info pointer.
+ * @return dvb_mosaic_info_part2 pointer.
+ */
+static inline struct dvb_mosaic_info_part2*
+	dvb_mosaic_info_part2(struct dvb_mosaic_info* entry)
+{
+	return (struct dvb_mosaic_info_part2*)
+		((uint8_t*) entry + sizeof(struct dvb_mosaic_info) +
+		 entry->elementary_cell_field_length);
+}
+
+/**
+ * Accessor for the linkage field a dvb_mosaic_info structure.
+ *
+ * @param entry dvb_mosaic_info_part2 pointer.
+ * @return dvb_mosaic_linkage pointer, or NULL on error.
+ */
+static inline struct dvb_mosaic_linkage*
+	dvb_mosaic_linkage(struct dvb_mosaic_info_part2* entry)
+{
+	if ((entry->cell_linkage_info != 0x01) &&
+	    (entry->cell_linkage_info != 0x02) &&
+	    (entry->cell_linkage_info != 0x03) &&
+	    (entry->cell_linkage_info != 0x04))
+		return NULL;
+
+	return (struct dvb_mosaic_linkage*)
+		((uint8_t*) entry + sizeof(struct dvb_mosaic_info_part2));
+}
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_mosaic_info*
+	dvb_mosaic_descriptor_infos_first(struct dvb_mosaic_descriptor *d)
+{
+	if (d->d.len == 1)
+		return NULL;
+
+	return (struct dvb_mosaic_info *)
+		((uint8_t*) d + sizeof(struct dvb_mosaic_descriptor));
+}
+
+static inline struct dvb_mosaic_info*
+	dvb_mosaic_descriptor_infos_next(struct dvb_mosaic_descriptor *d,
+					 struct dvb_mosaic_info *pos)
+{
+	struct dvb_mosaic_info_part2* part2 = dvb_mosaic_info_part2(pos);
+	uint8_t *end = (uint8_t*) d + 2 + d->d.len;
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct dvb_mosaic_info) +
+			pos->elementary_cell_field_length +
+			sizeof(struct dvb_mosaic_info_part2);
+
+	if (part2->cell_linkage_info == 0x01)
+		next += sizeof(struct dvb_mosaic_linkage_01);
+	else if (part2->cell_linkage_info == 0x02)
+		next += sizeof(struct dvb_mosaic_linkage_02);
+	else if (part2->cell_linkage_info == 0x03)
+		next += sizeof(struct dvb_mosaic_linkage_03);
+	else if (part2->cell_linkage_info == 0x04)
+		next += sizeof(struct dvb_mosaic_linkage_04);
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_mosaic_info *) next;
+}
+
+static inline struct dvb_mosaic_elementary_cell_field*
+	dvb_mosaic_info_fields_first(struct dvb_mosaic_info *d)
+{
+	if (d->elementary_cell_field_length == 0)
+		return NULL;
+
+	return (struct dvb_mosaic_elementary_cell_field*)
+		((uint8_t*) d + sizeof(struct dvb_mosaic_info));
+}
+
+static inline struct dvb_mosaic_elementary_cell_field*
+	dvb_mosaic_info_fields_next(struct dvb_mosaic_info *d,
+				    struct dvb_mosaic_elementary_cell_field* pos)
+{
+	uint8_t *end = (uint8_t*) d + sizeof(struct dvb_mosaic_info) +
+			d->elementary_cell_field_length;
+	uint8_t *next =	(uint8_t *) pos +
+			sizeof(struct dvb_mosaic_elementary_cell_field);
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_mosaic_elementary_cell_field *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif