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-rw-r--r--lib/libucsi/mpeg/odsmt_section.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/odsmt_section.c b/lib/libucsi/mpeg/odsmt_section.c
new file mode 100644
index 0000000..07407f2
--- /dev/null
+++ b/lib/libucsi/mpeg/odsmt_section.c
@@ -0,0 +1,80 @@
+/*
+ * 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
+ */
+
+#include <libucsi/mpeg/odsmt_section.h>
+
+struct mpeg_odsmt_section *mpeg_odsmt_section_codec(struct section_ext * ext)
+{
+ struct mpeg_odsmt_section * odsmt = (struct mpeg_odsmt_section *)ext;
+ uint8_t * buf = (uint8_t *)ext;
+ size_t pos = sizeof(struct section_ext);
+ size_t len = section_ext_length(ext);
+ int i;
+
+ if (len < sizeof(struct mpeg_odsmt_section))
+ return NULL;
+
+ pos++;
+
+ if (odsmt->stream_count == 0) {
+ struct mpeg_odsmt_stream * stream =
+ (struct mpeg_odsmt_stream *) (buf + pos);
+
+ if ((pos + sizeof(struct mpeg_odsmt_stream_single)) > len)
+ return NULL;
+
+ bswap16(buf+pos);
+ pos+=3;
+
+ if ((pos + stream->u.single.es_info_length) >= len)
+ return NULL;
+
+ if (verify_descriptors(buf + pos, stream->u.single.es_info_length))
+ return NULL;
+
+ pos += stream->u.single.es_info_length;
+ } else {
+ for (i=0; i< odsmt->stream_count; i++) {
+ struct mpeg_odsmt_stream * stream =
+ (struct mpeg_odsmt_stream *)(buf + pos);
+
+ if ((pos + sizeof(struct mpeg_odsmt_stream_multi)) > len)
+ return NULL;
+
+ bswap16(buf+pos);
+ pos += sizeof(struct mpeg_odsmt_stream_multi);
+
+ if ((pos + stream->u.multi.es_info_length) > len)
+ return NULL;
+
+ if (verify_descriptors(buf + pos,
+ stream->u.multi.es_info_length))
+ return NULL;
+
+ pos += stream->u.multi.es_info_length;
+ }
+ }
+
+ if (pos != len)
+ return NULL;
+
+ return (struct mpeg_odsmt_section *) ext;
+}