1 files changed, 224 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/odsmt_section.h b/lib/libucsi/mpeg/odsmt_section.h
new file mode 100644
index 0000000..4e01085
--- /dev/null
+++ b/lib/libucsi/mpeg/odsmt_section.h
@@ -0,0 +1,224 @@
+/*
+ * 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_MPEG_ODSMT_SECTION_H
+#define _UCSI_MPEG_ODSMT_SECTION_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/section.h>
+
+/**
+ * mpeg_odsmt_section structure.
+ */
+struct mpeg_odsmt_section {
+	struct section_ext head;
+
+	uint8_t stream_count;
+	/* stream_count==0 => struct mpeg_odsmt_stream_single streams
+	   stream_count>0  => struct mpeg_odsmt_stream_multi streams[] */
+	/* uint8_t object_descriptors[] */
+} __ucsi_packed;
+
+struct mpeg_odsmt_stream_single
+{
+	uint16_t esid;
+	uint8_t es_info_length;
+	/* struct descriptor descriptors[] */
+} __ucsi_packed;
+
+struct mpeg_odsmt_stream_multi
+{
+	uint16_t esid;
+	uint8_t fmc;
+	uint8_t es_info_length;
+	/* struct descriptor descriptors[] */
+} __ucsi_packed;
+
+/**
+ * Structure describing the stream information held in an mpeg_odsmt_section.
+ */
+struct mpeg_odsmt_stream {
+	union {
+		struct mpeg_odsmt_stream_single single;
+		struct mpeg_odsmt_stream_multi multi;
+	} u;
+} __ucsi_packed;
+
+/**
+ * Process an mpeg_odsmt_section.
+ *
+ * @param section Pointer to the generic section_ext structure.
+ * @return Pointer to a mpeg_odsmt_section structure, or NULL on error.
+ */
+extern struct mpeg_odsmt_section *mpeg_odsmt_section_codec(struct section_ext *section);
+
+/**
+ * Accessor for the PID field of an ODSMT.
+ *
+ * @param odsmt odsmt pointer.
+ * @return The pid.
+ */
+static inline uint16_t mpeg_odsmt_section_pid(struct mpeg_odsmt_section *odsmt)
+{
+	return odsmt->head.table_id_ext & 0x1fff;
+}
+
+/**
+ * Convenience iterator for the streams field of an mpeg_odsmt_section.
+ *
+ * @param osdmt Pointer to the mpeg_odsmt_section structure.
+ * @param pos Variable holding pointer to the current mpeg_odsmt_stream structure.
+ * @param index Variable holding the stream index.
+ */
+#define mpeg_odsmt_section_streams_for_each(osdmt, pos, index) \
+	for (index=0, (pos) = mpeg_odsmt_section_streams_first(odsmt); \
+	     (pos); \
+	     (pos) = mpeg_odsmt_section_streams_next(odsmt, pos, ++index))
+
+/**
+ * Convenience iterator for the descriptors field of an mpeg_odsmt_stream.
+ *
+ * @param osdmt Pointer to the mpeg_odsmt_section structure.
+ * @param stream Pointer to the mpeg_odsmt_stream structure.
+ * @param pos Variable holding pointer to the current descriptor structure.
+ */
+#define mpeg_odsmt_stream_descriptors_for_each(osdmt, stream, pos) \
+	for ((pos) = mpeg_odsmt_stream_descriptors_first(odsmt, stream); \
+	     (pos); \
+	     (pos) = mpeg_odsmt_stream_descriptors_next(odsmt, stream, pos))
+
+/**
+ * Retrieve a pointer to the object_descriptors field of an mpeg_odsmt_section.
+ *
+ * @param osdmt Pointer to the mpeg_odsmt_section structure.
+ * @param len On return, will contain the number of bytes in the object descriptors field.
+ * @return Pointer to the object_descriptors field, or NULL on error.
+ */
+static inline uint8_t*
+	mpeg_odsmt_section_object_descriptors(struct mpeg_odsmt_section * odsmt,
+					      size_t* len);
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct mpeg_odsmt_stream *
+	mpeg_odsmt_section_streams_first(struct mpeg_odsmt_section *odsmt)
+{
+	size_t pos = sizeof(struct mpeg_odsmt_section);
+
+	if (pos >= section_ext_length(&odsmt->head))
+		return NULL;
+
+	return (struct mpeg_odsmt_stream *) ((uint8_t *) odsmt + pos);
+}
+
+static inline struct mpeg_odsmt_stream *
+	mpeg_odsmt_section_streams_next(struct mpeg_odsmt_section *odsmt,
+					struct mpeg_odsmt_stream *pos,
+				        int _index)
+{
+	uint8_t *end = (uint8_t*) odsmt + section_ext_length(&odsmt->head);
+	uint8_t *next;
+
+	if (_index > odsmt->stream_count)
+		return NULL;
+
+	next = (uint8_t *) pos + sizeof(struct mpeg_odsmt_stream_multi) +
+		pos->u.multi.es_info_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct mpeg_odsmt_stream *) next;
+}
+
+static inline struct descriptor *
+	mpeg_odsmt_stream_descriptors_first(struct mpeg_odsmt_section *odsmt,
+				      	    struct mpeg_odsmt_stream *stream)
+{
+	if (odsmt->stream_count == 0) {
+		if (stream->u.single.es_info_length == 0)
+			return NULL;
+
+		return (struct descriptor *)
+			((uint8_t*) stream + sizeof(struct mpeg_odsmt_stream_single));
+	} else {
+		if (stream->u.multi.es_info_length == 0)
+			return NULL;
+
+		return (struct descriptor *)
+			((uint8_t*) stream + sizeof(struct mpeg_odsmt_stream_multi));
+	}
+}
+
+static inline struct descriptor *
+	mpeg_odsmt_stream_descriptors_next(struct mpeg_odsmt_section *odsmt,
+					   struct mpeg_odsmt_stream *stream,
+					   struct descriptor* pos)
+{
+	if (odsmt->stream_count == 0) {
+		return next_descriptor((uint8_t *) stream + sizeof(struct mpeg_odsmt_stream_single),
+				       stream->u.single.es_info_length,
+				       pos);
+	} else {
+		return next_descriptor((uint8_t *) stream + sizeof(struct mpeg_odsmt_stream_multi),
+				       stream->u.multi.es_info_length,
+				       pos);
+	}
+}
+
+static inline uint8_t*
+	mpeg_odsmt_section_object_descriptors(struct mpeg_odsmt_section * odsmt,
+					      size_t* len)
+{
+	struct mpeg_odsmt_stream* pos;
+	size_t size = sizeof(struct mpeg_odsmt_section);
+	int _index;
+
+	mpeg_odsmt_section_streams_for_each(odsmt, pos, _index) {
+		if (odsmt->stream_count == 0)
+			size += sizeof(struct mpeg_odsmt_stream_single) +
+					pos->u.single.es_info_length;
+		else
+			size += sizeof(struct mpeg_odsmt_stream_multi) +
+					pos->u.multi.es_info_length;
+	}
+
+	*len = section_ext_length(&odsmt->head) - size;
+	return (uint8_t*) odsmt + size;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif