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-rw-r--r--lib/libucsi/dvb/content_identifier_descriptor.h233
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diff --git a/lib/libucsi/dvb/content_identifier_descriptor.h b/lib/libucsi/dvb/content_identifier_descriptor.h
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+++ b/lib/libucsi/dvb/content_identifier_descriptor.h
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+/*
+ * 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