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diff --git a/call/adaptation/degradation_preference_provider.h b/call/adaptation/degradation_preference_provider.h
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+++ b/call/adaptation/degradation_preference_provider.h
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+/*
+ *  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_DEGRADATION_PREFERENCE_PROVIDER_H_
+#define CALL_ADAPTATION_DEGRADATION_PREFERENCE_PROVIDER_H_
+
+#include "api/rtp_parameters.h"
+
+namespace webrtc {
+
+// Thread-safe retrieval of degradation preferences.
+class DegradationPreferenceProvider {
+ public:
+  virtual ~DegradationPreferenceProvider();
+
+  virtual DegradationPreference degradation_preference() const = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // CALL_ADAPTATION_DEGRADATION_PREFERENCE_PROVIDER_H_