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authoretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
committeretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
commitab959d7b4194715870128e616b8e29d4a101e488 (patch)
tree61a746231d30817be73416a7d67763fd677a1042 /lib/libucsi/dvb/content_descriptor.h
parent6b350466c4902c5b137e0efaf1d189128a7f18f5 (diff)
downloadlinux-dvb-apps-ab959d7b4194715870128e616b8e29d4a101e488.tar.gz
Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207
Diffstat (limited to 'lib/libucsi/dvb/content_descriptor.h')
-rw-r--r--lib/libucsi/dvb/content_descriptor.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/content_descriptor.h b/lib/libucsi/dvb/content_descriptor.h
new file mode 100644
index 0000000..d2a63a0
--- /dev/null
+++ b/lib/libucsi/dvb/content_descriptor.h
@@ -0,0 +1,116 @@
+/*
+ * 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_DESCRIPTOR
+#define _UCSI_DVB_CONTENT_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+// FIXME: the nibbles
+
+/**
+ * dvb_content_descriptor structure.
+ */
+struct dvb_content_descriptor {
+ struct descriptor d;
+
+ /* struct dvb_content_nibble nibbles[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the nibbles field of a dvb_content_descriptor.
+ */
+struct dvb_content_nibble {
+ EBIT2(uint8_t content_nibble_level_1 : 4; ,
+ uint8_t content_nibble_level_2 : 4; );
+ EBIT2(uint8_t user_nibble_1 : 4; ,
+ uint8_t user_nibble_2 : 4; );
+} __ucsi_packed;
+
+/**
+ * Process a dvb_content_descriptor.
+ *
+ * @param d Generic descriptor pointer.
+ * @return dvb_content_descriptor pointer, or NULL on error.
+ */
+static inline struct dvb_content_descriptor*
+ dvb_content_descriptor_codec(struct descriptor* d)
+{
+ if (d->len % sizeof(struct dvb_content_nibble))
+ return NULL;
+
+ return (struct dvb_content_descriptor*) d;
+}
+
+/**
+ * Iterator for the nibbles field of a dvb_content_descriptor.
+ *
+ * @param d dvb_content_descriptor pointer.
+ * @param pos Variable containing a pointer to the current dvb_content_nibble.
+ */
+#define dvb_content_descriptor_nibbles_for_each(d, pos) \
+ for ((pos) = dvb_content_descriptor_nibbles_first(d); \
+ (pos); \
+ (pos) = dvb_content_descriptor_nibbles_next(d, pos))
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_content_nibble*
+ dvb_content_descriptor_nibbles_first(struct dvb_content_descriptor *d)
+{
+ if (d->d.len == 0)
+ return NULL;
+
+ return (struct dvb_content_nibble *)
+ ((uint8_t*) d + sizeof(struct dvb_content_descriptor));
+}
+
+static inline struct dvb_content_nibble*
+ dvb_content_descriptor_nibbles_next(struct dvb_content_descriptor *d,
+ struct dvb_content_nibble *pos)
+{
+ uint8_t *end = (uint8_t*) d + 2 + d->d.len;
+ uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_content_nibble);
+
+ if (next >= end)
+ return NULL;
+
+ return (struct dvb_content_nibble *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif