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diff --git a/third_party/libwebrtc/test/encoder_settings.h b/third_party/libwebrtc/test/encoder_settings.h
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+/*
+ *  Copyright (c) 2014 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 TEST_ENCODER_SETTINGS_H_
+#define TEST_ENCODER_SETTINGS_H_
+
+#include <stddef.h>
+
+#include <string>
+#include <vector>
+
+#include "call/video_receive_stream.h"
+#include "call/video_send_stream.h"
+#include "video/config/video_encoder_config.h"
+
+namespace webrtc {
+namespace test {
+
+class DefaultVideoStreamFactory
+    : public VideoEncoderConfig::VideoStreamFactoryInterface {
+ public:
+  DefaultVideoStreamFactory();
+
+  static const size_t kMaxNumberOfStreams = 3;
+  // Defined as {150000, 450000, 1500000};
+  static const int kMaxBitratePerStream[];
+  // Defined as {50000, 200000, 700000};
+  static const int kDefaultMinBitratePerStream[];
+
+ private:
+  std::vector<VideoStream> CreateEncoderStreams(
+      int frame_width,
+      int frame_height,
+      const webrtc::VideoEncoderConfig& encoder_config) override;
+};
+
+// Creates `encoder_config.number_of_streams` VideoStreams where index
+// `encoder_config.number_of_streams -1` have width = `width`, height =
+// `height`. The total max bitrate of all VideoStreams is
+// `encoder_config.max_bitrate_bps`.
+std::vector<VideoStream> CreateVideoStreams(
+    int width,
+    int height,
+    const webrtc::VideoEncoderConfig& encoder_config);
+
+void FillEncoderConfiguration(VideoCodecType codec_type,
+                              size_t num_streams,
+                              VideoEncoderConfig* configuration);
+
+VideoReceiveStreamInterface::Decoder CreateMatchingDecoder(
+    int payload_type,
+    const std::string& payload_name);
+
+VideoReceiveStreamInterface::Decoder CreateMatchingDecoder(
+    const VideoSendStream::Config& config);
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // TEST_ENCODER_SETTINGS_H_