Simple RTP reader/writer.

This is an implementation of simple RTP reader and writer. It still lacks proper support of VP8 payload header. Will implement it in another CL.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3829007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@63294 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 40 insertions, 0 deletions

diff --git a/remoting/protocol/rtp_utils.h b/remoting/protocol/rtp_utils.h
new file mode 100644
index 0000000..43f6c66
--- /dev/null
+++ b/remoting/protocol/rtp_utils.h
@@ -0,0 +1,40 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef REMOTING_PROTOCOL_RTP_UTILS_H_
+#define REMOTING_PROTOCOL_RTP_UTILS_H_
+
+#include "base/basictypes.h"
+
+namespace remoting {
+
+struct RtpHeader {
+  // RTP version is always set to 2.
+  // version = 2
+  bool padding;
+  bool extension;
+  uint8 sources;
+  bool marker;
+  uint8 payload_type;
+  uint16 sequence_number;
+  uint32 timestamp;
+  uint32 sync_source_id;
+  uint32 source_id[15];
+};
+
+// Returns size of RTP header for the specified number of sources.
+int GetRtpHeaderSize(int sources);
+
+// Packs RTP header into the buffer.
+void PackRtpHeader(uint8* buffer, int buffer_size,
+                   const RtpHeader& header);
+
+// Unpacks RTP header and stores unpacked values in |header|. If the header
+// is not valid returns -1, otherwise returns size of the header.
+int UnpackRtpHeader(const uint8* buffer, int buffer_size,
+                    RtpHeader* header);
+
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_RTP_UTILS_H_