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diff --git a/test/testsupport/packet_reader.h b/test/testsupport/packet_reader.h
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+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_TEST_TESTSUPPORT_PACKET_READER_H_
+#define WEBRTC_TEST_TESTSUPPORT_PACKET_READER_H_
+
+#include "typedefs.h"
+
+namespace webrtc {
+namespace test {
+
+// Reads chunks of data to simulate network packets from a byte array.
+class PacketReader {
+ public:
+  PacketReader();
+  virtual ~PacketReader();
+
+  // Inizializes a new reading operation. Must be done before invoking the
+  // NextPacket method.
+  // * data_length_in_bytes is the length of the data byte array. Must be >= 0.
+  //   0 length will result in no packets are read.
+  // * packet_size_in_bytes is the number of bytes to read in each NextPacket
+  //   method call. Must be > 0
+  virtual void InitializeReading(WebRtc_UWord8* data, int data_length_in_bytes,
+                                 int packet_size_in_bytes);
+
+  // Moves the supplied pointer to the beginning of the next packet.
+  // Returns:
+  // *  The size of the packet ready to read (lower than the packet size for
+  //    the last packet)
+  // *  0 if there are no more packets to read
+  // * -1 if InitializeReading has not been called (also prints to stderr).
+  virtual int NextPacket(WebRtc_UWord8** packet_pointer);
+
+ private:
+  WebRtc_UWord8* data_;
+  int data_length_;
+  int packet_size_;
+  int currentIndex_;
+  bool initialized_;
+};
+
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // WEBRTC_TEST_TESTSUPPORT_PACKET_READER_H_