1 files changed, 118 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/pat_section.h b/lib/libucsi/mpeg/pat_section.h
new file mode 100644
index 0000000..eadfe28
--- /dev/null
+++ b/lib/libucsi/mpeg/pat_section.h
@@ -0,0 +1,118 @@
+/*
+ * 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_PAT_SECTION_H
+#define _UCSI_MPEG_PAT_SECTION_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/section.h>
+
+/**
+ * mpeg_pat_section structure.
+ */
+struct mpeg_pat_section {
+	struct section_ext head; /* table_id_ext == transport_stream_id */
+
+	/* struct mpeg_pat_program programs[] */
+} __ucsi_packed;
+
+/**
+ * A program within an mpeg_pat_section.
+ */
+struct mpeg_pat_program {
+	uint16_t program_number;
+  EBIT2(uint16_t reserved	: 3; ,
+	uint16_t pid		:13; );
+} __ucsi_packed;
+
+/**
+ * Process an mpeg_pat_section.
+ *
+ * @param section Pointer to the generic section_ext structure.
+ * @return Pointer to the mpeg_pat_section structure, or NULL on error.
+ */
+extern struct mpeg_pat_section *mpeg_pat_section_codec(struct section_ext *section);
+
+/**
+ * Accessor for the transport_stream_id field of a PAT.
+ *
+ * @param pat PAT pointer.
+ * @return The transport_stream_id.
+ */
+static inline uint16_t mpeg_pat_section_transport_stream_id(struct mpeg_pat_section *pat)
+{
+	return pat->head.table_id_ext;
+}
+
+/**
+ * Conveience iterator for the programs field of an mpeg_pat_section.
+ *
+ * @param pat Pointer to the mpeg_pat_section structure.
+ * @param pos Variable holding a pointer to the current mpeg_pat_program structure.
+ */
+#define mpeg_pat_section_programs_for_each(pat, pos) \
+	for ((pos) = mpeg_pat_section_programs_first(pat); \
+	     (pos); \
+	     (pos) = mpeg_pat_section_programs_next(pat, pos))
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline struct mpeg_pat_program *
+	mpeg_pat_section_programs_first(struct mpeg_pat_section * pat)
+{
+	size_t pos = sizeof(struct mpeg_pat_section);
+
+	if (pos >= section_ext_length(&pat->head))
+		return NULL;
+
+	return (struct mpeg_pat_program*)((uint8_t *) pat + pos);
+}
+
+static inline
+	struct mpeg_pat_program *mpeg_pat_section_programs_next(struct mpeg_pat_section * pat,
+								struct mpeg_pat_program * pos)
+{
+	uint8_t *end = (uint8_t*) pat + section_ext_length(&pat->head);
+	uint8_t *next= (uint8_t *) pos + sizeof(struct mpeg_pat_program);
+
+	if (next >= end)
+		return NULL;
+
+	return (struct mpeg_pat_program *) next;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif