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-rw-r--r--lib/libucsi/dvb/mosaic_descriptor.h324
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