1 files changed, 137 insertions, 0 deletions
diff --git a/lib/libucsi/atsc/caption_service_descriptor.h b/lib/libucsi/atsc/caption_service_descriptor.h
new file mode 100644
index 0000000..29d1794
--- /dev/null
+++ b/lib/libucsi/atsc/caption_service_descriptor.h
@@ -0,0 +1,137 @@
+/*
+ * 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_ATSC_CAPTION_SERVICE_DESCRIPTOR
+#define _UCSI_ATSC_CAPTION_SERVICE_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+#include <libucsi/types.h>
+
+/**
+ * atsc_caption_service_descriptor structure.
+ */
+struct atsc_caption_service_descriptor {
+	struct descriptor d;
+
+  EBIT2(uint8_t reserved		: 3; ,
+	uint8_t number_of_services	: 5; );
+	/* struct atsc_caption_service_entry entries[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the entries field of a atsc_caption_service_descriptor.
+ */
+struct atsc_caption_service_entry {
+	iso639lang_t language_code;
+  EBIT3(uint8_t digital_cc 		: 1; ,
+	uint8_t reserved		: 1; ,
+	uint8_t value			: 6; );
+  EBIT3(uint16_t easy_reader 		: 1; ,
+	uint16_t wide_aspect_ratio	: 1; ,
+	uint16_t reserved1		:14; );
+} __ucsi_packed;
+
+/**
+ * Process an atsc_caption_service_descriptor.
+ *
+ * @param d Generic descriptor pointer.
+ * @return atsc_caption_service_descriptor pointer, or NULL on error.
+ */
+static inline struct atsc_caption_service_descriptor*
+	atsc_caption_service_descriptor_codec(struct descriptor* d)
+{
+	struct atsc_caption_service_descriptor *ret =
+		(struct atsc_caption_service_descriptor *) d;
+	uint8_t *buf = (uint8_t*) d + 2;
+	int pos = 0;
+	int idx;
+
+	if (d->len < 1)
+		return NULL;
+	pos++;
+
+	for(idx = 0; idx < ret->number_of_services; idx++) {
+		if (d->len < (pos + sizeof(struct atsc_caption_service_entry)))
+			return NULL;
+
+		bswap16(buf+pos+4);
+
+		pos += sizeof(struct atsc_caption_service_entry);
+	}
+
+	return (struct atsc_caption_service_descriptor*) d;
+}
+
+/**
+ * Iterator for entries field of a atsc_caption_service_descriptor.
+ *
+ * @param d atsc_caption_service_descriptor pointer.
+ * @param pos Variable holding a pointer to the current atsc_caption_service_entry.
+ * @param idx Field iterator integer.
+ */
+#define atsc_caption_service_descriptor_entries_for_each(d, pos, idx) \
+	for ((pos) = atsc_caption_service_descriptor_entries_first(d), idx=0; \
+	     (pos); \
+	     (pos) = atsc_caption_service_descriptor_entries_next(d, pos, ++idx))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct atsc_caption_service_entry*
+	atsc_caption_service_descriptor_entries_first(struct atsc_caption_service_descriptor *d)
+{
+	if (d->number_of_services == 0)
+		return NULL;
+
+	return (struct atsc_caption_service_entry *)
+		((uint8_t*) d + sizeof(struct atsc_caption_service_descriptor));
+}
+
+static inline struct atsc_caption_service_entry*
+	atsc_caption_service_descriptor_entries_next(struct atsc_caption_service_descriptor *d,
+						     struct atsc_caption_service_entry *pos,
+						     int idx)
+{
+	if (idx >= d->number_of_services)
+		return NULL;
+
+	return (struct atsc_caption_service_entry *)
+		((uint8_t *) pos + sizeof(struct atsc_caption_service_entry));
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif