1 files changed, 141 insertions, 0 deletions
diff --git a/lib/libucsi/atsc/service_location_descriptor.h b/lib/libucsi/atsc/service_location_descriptor.h
new file mode 100644
index 0000000..aad5b4a
--- /dev/null
+++ b/lib/libucsi/atsc/service_location_descriptor.h
@@ -0,0 +1,141 @@
+/*
+ * 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_SERVICE_LOCATION_DESCRIPTOR
+#define _UCSI_ATSC_SERVICE_LOCATION_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+#include <libucsi/types.h>
+
+enum atsc_stream_types {
+	ATSC_STREAM_TYPE_VIDEO			= 0x02,
+	ATSC_STREAM_TYPE_AUDIO 			= 0x81,
+};
+
+/**
+ * atsc_service_location_descriptor structure.
+ */
+struct atsc_service_location_descriptor {
+	struct descriptor d;
+
+  EBIT2(uint16_t reserved		: 3; ,
+	uint16_t PCR_PID		:13; );
+	uint8_t number_elements;
+	/* struct atsc_service_location_element elements[] */
+} __ucsi_packed;
+
+/**
+ * An entry in the elements field of an atsc_service_location_descriptor.
+ */
+struct atsc_caption_service_location_element {
+	uint8_t stream_type;
+  EBIT2(uint16_t reserved 		: 3; ,
+	uint16_t elementary_PID		:13; );
+	iso639lang_t language_code;
+} __ucsi_packed;
+
+/**
+ * Process an atsc_service_location_descriptor.
+ *
+ * @param d Generic descriptor pointer.
+ * @return atsc_service_location_descriptor pointer, or NULL on error.
+ */
+static inline struct atsc_service_location_descriptor*
+	atsc_service_location_descriptor_codec(struct descriptor* d)
+{
+	struct atsc_service_location_descriptor *ret =
+		(struct atsc_service_location_descriptor *) d;
+	uint8_t *buf = (uint8_t*) d + 2;
+	int pos = 0;
+	int idx;
+
+	if (d->len < 3)
+		return NULL;
+	bswap16(buf + pos);
+	pos+=3;
+
+	for(idx = 0; idx < ret->number_elements; idx++) {
+		if (d->len < (pos + sizeof(struct atsc_caption_service_entry)))
+			return NULL;
+
+		bswap16(buf+pos+1);
+
+		pos += sizeof(struct atsc_caption_service_entry);
+	}
+
+	return (struct atsc_service_location_descriptor*) d;
+}
+
+/**
+ * Iterator for elements field of a atsc_service_location_descriptor.
+ *
+ * @param d atsc_service_location_descriptor pointer.
+ * @param pos Variable holding a pointer to the current atsc_service_location_element.
+ * @param idx Integer used to count which dimension we are in.
+ */
+#define atsc_service_location_descriptor_elements_for_each(d, pos, idx) \
+	for ((pos) = atsc_service_location_descriptor_elements_first(d), idx=0; \
+	     (pos); \
+	     (pos) = atsc_service_location_descriptor_elements_next(d, pos, ++idx))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct atsc_caption_service_location_element*
+	atsc_service_location_descriptor_elements_first(struct atsc_service_location_descriptor *d)
+{
+	if (d->number_elements == 0)
+		return NULL;
+
+	return (struct atsc_caption_service_location_element *)
+		((uint8_t*) d + sizeof(struct atsc_service_location_descriptor));
+}
+
+static inline struct atsc_caption_service_location_element*
+ 	atsc_service_location_descriptor_elements_next(struct atsc_service_location_descriptor *d,
+						       struct atsc_caption_service_location_element *pos,
+ 						       int idx)
+{
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct atsc_caption_service_location_element);
+
+	if (idx >= d->number_elements)
+		return NULL;
+	return (struct atsc_caption_service_location_element *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif