Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207

1 files changed, 188 insertions, 0 deletions

diff --git a/lib/libucsi/mpeg/pmt_section.h b/lib/libucsi/mpeg/pmt_section.h
new file mode 100644
index 0000000..03dea1b
--- /dev/null
+++ b/lib/libucsi/mpeg/pmt_section.h
@@ -0,0 +1,188 @@
+/*
+ * 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_PMT_SECTION_H
+#define _UCSI_MPEG_PMT_SECTION_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/section.h>
+
+/**
+ * mpeg_pmt_section structure.
+ */
+struct mpeg_pmt_section {
+	struct section_ext head;
+
+  EBIT2(uint16_t reserved_1		: 3; ,
+	uint16_t pcr_pid		:13; );
+  EBIT2(uint16_t reserved_2		: 4; ,
+	uint16_t program_info_length	:12; );
+	/* struct descriptor descriptors[] */
+	/* struct mpeg_pmt_stream streams[] */
+} __ucsi_packed;
+
+/**
+ * A stream within an mpeg_pmt_section.
+ */
+struct mpeg_pmt_stream {
+	uint8_t stream_type;
+  EBIT2(uint16_t reserved_1		: 3; ,
+	uint16_t pid			:13; );
+  EBIT2(uint16_t reserved_2		: 4; ,
+	uint16_t es_info_length		:12; );
+
+	/* struct descriptor descriptors[] */
+} __ucsi_packed;
+
+/**
+ * Process an mpeg_pmt_section section.
+ *
+ * @param section Pointer to the generic section header.
+ * @return Pointer to the mpeg_pmt_section structure, or NULL on error.
+ */
+extern struct mpeg_pmt_section *mpeg_pmt_section_codec(struct section_ext *section);
+
+/**
+ * Accessor for program_number field of a PMT.
+ *
+ * @param pmt PMT pointer.
+ * @return The program_number.
+ */
+static inline uint16_t mpeg_pmt_section_program_number(struct mpeg_pmt_section *pmt)
+{
+	return pmt->head.table_id_ext;
+}
+
+/**
+ * Convenience iterator for the descriptors field of the mpeg_pmt_section structure.
+ *
+ * @param pmt Pointer to the mpeg_pmt_section structure.
+ * @param pos Variable holding a pointer to the current descriptor.
+ */
+#define mpeg_pmt_section_descriptors_for_each(pmt, pos) \
+	for ((pos) = mpeg_pmt_section_descriptors_first(pmt); \
+	     (pos); \
+	     (pos) = mpeg_pmt_section_descriptors_next(pmt, pos))
+
+/**
+ * Convenience iterator for the streams field of the mpeg_pmt_section structure.
+ *
+ * @param pmt Pointer to the mpeg_pmt_section structure.
+ * @param pos Variable holding a pointer to the current mpeg_pmt_stream.
+ */
+#define mpeg_pmt_section_streams_for_each(pmt, pos) \
+	for ((pos) = mpeg_pmt_section_streams_first(pmt); \
+	     (pos); \
+	     (pos) = mpeg_pmt_section_streams_next(pmt, pos))
+
+/**
+ * Convenience iterator for the descriptors field of an mpeg_pmt_stream structure.
+ *
+ * @param stream Pointer to the mpeg_pmt_stream structure.
+ * @param pos Variable holding a pointer to the current descriptor.
+ */
+#define mpeg_pmt_stream_descriptors_for_each(stream, pos) \
+	for ((pos) = mpeg_pmt_stream_descriptors_first(stream); \
+	     (pos); \
+	     (pos) = mpeg_pmt_stream_descriptors_next(stream, pos))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct descriptor *
+	mpeg_pmt_section_descriptors_first(struct mpeg_pmt_section * pmt)
+{
+	if (pmt->program_info_length == 0)
+		return NULL;
+
+	return (struct descriptor *)
+		((uint8_t *) pmt + sizeof(struct mpeg_pmt_section));
+}
+
+static inline struct descriptor *
+	mpeg_pmt_section_descriptors_next(struct mpeg_pmt_section *pmt,
+					  struct descriptor* pos)
+{
+	return next_descriptor((uint8_t *) pmt + sizeof(struct mpeg_pmt_section),
+			       pmt->program_info_length,
+			       pos);
+}
+
+static inline struct mpeg_pmt_stream *
+	mpeg_pmt_section_streams_first(struct mpeg_pmt_section * pmt)
+{
+	size_t pos = sizeof(struct mpeg_pmt_section) + pmt->program_info_length;
+
+	if (pos >= section_ext_length(&pmt->head))
+		return NULL;
+
+	return (struct mpeg_pmt_stream *)((uint8_t *)pmt + pos);
+}
+
+static inline struct mpeg_pmt_stream *
+	mpeg_pmt_section_streams_next(struct mpeg_pmt_section * pmt,
+				      struct mpeg_pmt_stream * pos)
+{
+	uint8_t *end = (uint8_t*) pmt + section_ext_length(&pmt->head);
+	uint8_t *next =	(uint8_t *) pos + sizeof(struct mpeg_pmt_stream) +
+			pos->es_info_length;
+
+	if (next >= end)
+		return NULL;
+
+	return (struct mpeg_pmt_stream *) next;
+}
+
+static inline struct descriptor *
+	mpeg_pmt_stream_descriptors_first(struct mpeg_pmt_stream *stream)
+{
+	if (stream->es_info_length == 0)
+		return NULL;
+
+	return (struct descriptor *)
+		((uint8_t*) stream + sizeof(struct mpeg_pmt_stream));
+}
+
+static inline struct descriptor *
+	mpeg_pmt_stream_descriptors_next(struct mpeg_pmt_stream *stream,
+					 struct descriptor* pos)
+{
+	return next_descriptor((uint8_t *) stream + sizeof(struct mpeg_pmt_stream),
+			       stream->es_info_length,
+			       pos);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif