1 files changed, 126 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/subtitling_descriptor.h b/lib/libucsi/dvb/subtitling_descriptor.h
new file mode 100644
index 0000000..74fc25a
--- /dev/null
+++ b/lib/libucsi/dvb/subtitling_descriptor.h
@@ -0,0 +1,126 @@
+/*
+ * 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_SUBTITLING_DESCRIPTOR
+#define _UCSI_DVB_SUBTITLING_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+#include <libucsi/types.h>
+
+/**
+ * dvb_subtitling_descriptor structure.
+ */
+struct dvb_subtitling_descriptor {
+	struct descriptor d;
+
+	/* struct dvb_subtitling_entry subtitles[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the subtitles field of the a dvb_subtitling_descriptor.
+ */
+struct dvb_subtitling_entry {
+	iso639lang_t language_code;
+	uint8_t subtitling_type;
+	uint16_t composition_page_id;
+	uint16_t ancillary_page_id;
+} __ucsi_packed;
+
+/**
+ * Process a dvb_subtitling_descriptor.
+ *
+ * @param d Generic descriptor.
+ * @return dvb_subtitling_descriptor pointer, or NULL on error.
+ */
+static inline struct dvb_subtitling_descriptor*
+	dvb_subtitling_descriptor_codec(struct descriptor* d)
+{
+	uint32_t pos = 0;
+	uint8_t* ptr = (uint8_t*) d + 2;
+	uint32_t len = d->len;
+
+	if (len % sizeof(struct dvb_subtitling_entry))
+		return NULL;
+
+	while(pos < len) {
+		bswap16(ptr+pos+4);
+		bswap16(ptr+pos+6);
+		pos += sizeof(struct dvb_subtitling_entry);
+	}
+
+	return (struct dvb_subtitling_descriptor*) d;
+}
+
+/**
+ * Iterator for subtitles field in dvb_subtitling_descriptor.
+ *
+ * @param d dvb_subtitling_descriptor pointer.
+ * @param pos Variable containing a pointer to current dvb_subtitling_entry.
+ */
+#define dvb_subtitling_descriptor_subtitles_for_each(d, pos) \
+	for ((pos) = dvb_subtitling_descriptor_subtitles_first(d); \
+	     (pos); \
+	     (pos) = dvb_subtitling_descriptor_subtitles_next(d, pos))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct dvb_subtitling_entry*
+	dvb_subtitling_descriptor_subtitles_first(struct dvb_subtitling_descriptor *d)
+{
+	if (d->d.len == 0)
+		return NULL;
+
+	return (struct dvb_subtitling_entry *)
+		((uint8_t*) d + sizeof(struct dvb_subtitling_descriptor));
+}
+
+static inline struct dvb_subtitling_entry*
+	dvb_subtitling_descriptor_subtitles_next(struct dvb_subtitling_descriptor *d,
+						 struct dvb_subtitling_entry *pos)
+{
+	uint8_t *end = (uint8_t*) d + 2 + d->d.len;
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct dvb_subtitling_entry);
+
+	if (next >= end)
+		return NULL;
+
+	return (struct dvb_subtitling_entry *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif