1 files changed, 101 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/video_stream_descriptor.h b/lib/libucsi/mpeg/video_stream_descriptor.h
new file mode 100644
index 0000000..14e9196
--- /dev/null
+++ b/lib/libucsi/mpeg/video_stream_descriptor.h
@@ -0,0 +1,101 @@
+/*
+ * 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_VIDEO_STREAM_DESCRIPTOR
+#define _UCSI_MPEG_VIDEO_STREAM_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+/**
+ * The mpeg_video_stream_descriptor structure
+ */
+struct mpeg_video_stream_descriptor {
+	struct descriptor d;
+
+  EBIT5(uint8_t multiple_frame_rate_flag	: 1; ,
+	uint8_t frame_rate_code			: 4; ,
+	uint8_t mpeg_1_only_flag		: 1; ,
+	uint8_t constrained_parameter_flag	: 1; ,
+	uint8_t still_picture_flag		: 1; );
+	/* if (mpeg_1_only_flag == 0) struct mpeg_video_stream_extra extra */
+} __ucsi_packed;
+
+/**
+ * The mpeg_video_stream_extra - only present in non-MPEG1-only streams.
+ */
+struct mpeg_video_stream_extra {
+	uint8_t profile_and_level_indication;
+  EBIT3(uint8_t chroma_format			: 2; ,
+	uint8_t frame_rate_extension		: 1; ,
+	uint8_t reserved			: 5; );
+} __ucsi_packed;
+
+/**
+ * Process an mpeg_video_stream_descriptor structure.
+ *
+ * @param d Pointer to the generic descriptor structure.
+ * @return Pointer to the mpeg_video_stream_descriptor, or NULL on error.
+ */
+static inline struct mpeg_video_stream_descriptor*
+	mpeg_video_stream_descriptor_codec(struct descriptor* d)
+{
+	struct mpeg_video_stream_descriptor* vsd =
+			(struct mpeg_video_stream_descriptor*) d;
+
+	if (d->len < (sizeof(struct mpeg_video_stream_descriptor) - 2))
+		return NULL;
+
+	if (!vsd->mpeg_1_only_flag) {
+		if (d->len != (sizeof(struct mpeg_video_stream_descriptor) +
+				  sizeof(struct mpeg_video_stream_extra) - 2))
+			return NULL;
+	}
+
+	return (struct mpeg_video_stream_descriptor*) d;
+}
+
+/**
+ * Get a pointer to the mpeg_video_stream_extra structure.
+ *
+ * @param d Pointer to the mpeg_video_stream_descriptor structure.
+ * @return Pointer to the mpeg_video_stream_extra structure, or NULL on error.
+ */
+static inline struct mpeg_video_stream_extra*
+	mpeg_video_stream_descriptor_extra(struct mpeg_video_stream_descriptor* d)
+{
+	if (d->mpeg_1_only_flag != 0)
+		return NULL;
+
+	return (struct mpeg_video_stream_extra*)
+		((uint8_t*) d + sizeof(struct mpeg_video_stream_descriptor));
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif