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diff --git a/third_party/libwebrtc/call/adaptation/video_stream_input_state.h b/third_party/libwebrtc/call/adaptation/video_stream_input_state.h
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+++ b/third_party/libwebrtc/call/adaptation/video_stream_input_state.h
@@ -0,0 +1,53 @@
+/*
+ *  Copyright 2020 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 CALL_ADAPTATION_VIDEO_STREAM_INPUT_STATE_H_
+#define CALL_ADAPTATION_VIDEO_STREAM_INPUT_STATE_H_
+
+#include "absl/types/optional.h"
+#include "api/video/video_codec_type.h"
+
+namespace webrtc {
+
+// The source resolution, frame rate and other properties of a
+// VideoStreamEncoder.
+class VideoStreamInputState {
+ public:
+  VideoStreamInputState();
+
+  void set_has_input(bool has_input);
+  void set_frame_size_pixels(absl::optional<int> frame_size_pixels);
+  void set_frames_per_second(int frames_per_second);
+  void set_video_codec_type(VideoCodecType video_codec_type);
+  void set_min_pixels_per_frame(int min_pixels_per_frame);
+  void set_single_active_stream_pixels(
+      absl::optional<int> single_active_stream_pixels);
+
+  bool has_input() const;
+  absl::optional<int> frame_size_pixels() const;
+  int frames_per_second() const;
+  VideoCodecType video_codec_type() const;
+  int min_pixels_per_frame() const;
+  absl::optional<int> single_active_stream_pixels() const;
+
+  bool HasInputFrameSizeAndFramesPerSecond() const;
+
+ private:
+  bool has_input_;
+  absl::optional<int> frame_size_pixels_;
+  int frames_per_second_;
+  VideoCodecType video_codec_type_;
+  int min_pixels_per_frame_;
+  absl::optional<int> single_active_stream_pixels_;
+};
+
+}  // namespace webrtc
+
+#endif  // CALL_ADAPTATION_VIDEO_STREAM_INPUT_STATE_H_