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diff --git a/third_party/libwebrtc/modules/audio_coding/test/TwoWayCommunication.h b/third_party/libwebrtc/modules/audio_coding/test/TwoWayCommunication.h
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+++ b/third_party/libwebrtc/modules/audio_coding/test/TwoWayCommunication.h
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+/*
+ *  Copyright (c) 2012 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 MODULES_AUDIO_CODING_TEST_TWOWAYCOMMUNICATION_H_
+#define MODULES_AUDIO_CODING_TEST_TWOWAYCOMMUNICATION_H_
+
+#include <memory>
+
+#include "api/audio_codecs/audio_encoder_factory.h"
+#include "api/audio_codecs/audio_format.h"
+#include "modules/audio_coding/include/audio_coding_module.h"
+#include "modules/audio_coding/test/Channel.h"
+#include "modules/audio_coding/test/PCMFile.h"
+
+namespace webrtc {
+
+class TwoWayCommunication {
+ public:
+  TwoWayCommunication();
+  ~TwoWayCommunication();
+
+  void Perform();
+
+ private:
+  void SetUpAutotest(AudioEncoderFactory* const encoder_factory,
+                     const SdpAudioFormat& format1,
+                     int payload_type1,
+                     const SdpAudioFormat& format2,
+                     int payload_type2);
+
+  std::unique_ptr<AudioCodingModule> _acmA;
+  std::unique_ptr<AudioCodingModule> _acmB;
+
+  std::unique_ptr<AudioCodingModule> _acmRefA;
+  std::unique_ptr<AudioCodingModule> _acmRefB;
+
+  Channel* _channel_A2B;
+  Channel* _channel_B2A;
+
+  Channel* _channelRef_A2B;
+  Channel* _channelRef_B2A;
+
+  PCMFile _inFileA;
+  PCMFile _inFileB;
+
+  PCMFile _outFileA;
+  PCMFile _outFileB;
+
+  PCMFile _outFileRefA;
+  PCMFile _outFileRefB;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_CODING_TEST_TWOWAYCOMMUNICATION_H_