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diff --git a/third_party/libwebrtc/modules/audio_processing/test/conversational_speech/mock_wavreader_factory.h b/third_party/libwebrtc/modules/audio_processing/test/conversational_speech/mock_wavreader_factory.h
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+++ b/third_party/libwebrtc/modules/audio_processing/test/conversational_speech/mock_wavreader_factory.h
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+/*
+ *  Copyright (c) 2017 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_PROCESSING_TEST_CONVERSATIONAL_SPEECH_MOCK_WAVREADER_FACTORY_H_
+#define MODULES_AUDIO_PROCESSING_TEST_CONVERSATIONAL_SPEECH_MOCK_WAVREADER_FACTORY_H_
+
+#include <map>
+#include <memory>
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "modules/audio_processing/test/conversational_speech/wavreader_abstract_factory.h"
+#include "modules/audio_processing/test/conversational_speech/wavreader_interface.h"
+#include "test/gmock.h"
+
+namespace webrtc {
+namespace test {
+namespace conversational_speech {
+
+class MockWavReaderFactory : public WavReaderAbstractFactory {
+ public:
+  struct Params {
+    int sample_rate;
+    size_t num_channels;
+    size_t num_samples;
+  };
+
+  MockWavReaderFactory(const Params& default_params,
+                       const std::map<std::string, const Params>& params);
+  explicit MockWavReaderFactory(const Params& default_params);
+  ~MockWavReaderFactory();
+
+  MOCK_METHOD(std::unique_ptr<WavReaderInterface>,
+              Create,
+              (absl::string_view),
+              (const, override));
+
+ private:
+  // Creates a MockWavReader instance using the parameters in
+  // audiotrack_names_params_ if the entry corresponding to filepath exists,
+  // otherwise creates a MockWavReader instance using the default parameters.
+  std::unique_ptr<WavReaderInterface> CreateMock(absl::string_view filepath);
+
+  const Params& default_params_;
+  std::map<std::string, const Params> audiotrack_names_params_;
+};
+
+}  // namespace conversational_speech
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_PROCESSING_TEST_CONVERSATIONAL_SPEECH_MOCK_WAVREADER_FACTORY_H_