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diff --git a/src/3rdparty/resonance-audio/resonance_audio/dsp/shoe_box_room.h b/src/3rdparty/resonance-audio/resonance_audio/dsp/shoe_box_room.h
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+++ b/src/3rdparty/resonance-audio/resonance_audio/dsp/shoe_box_room.h
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+/*
+Copyright 2018 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS-IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#ifndef RESONANCE_AUDIO_DSP_SHOE_BOX_ROOM_H_
+#define RESONANCE_AUDIO_DSP_SHOE_BOX_ROOM_H_
+
+#include <vector>
+
+#include "base/misc_math.h"
+#include "dsp/reflection.h"
+
+namespace vraudio {
+
+// Computes a set of reflections from each surface of a shoe-box room model.
+// Uses a simplified calculation method which assumes that all the sources are
+// 'attached' to the listener. Also, assumes that the listener is inside the
+// shoe-box room.
+//
+// @param relative_listener_position Relative listener position to the center of
+//     the room.
+// @param room_dimensions Dimensions of the room.
+// @param reflection_coefficients Reflection coefficients.
+// @return List of computed reflections by the image source method.
+void ComputeReflections(const WorldPosition& relative_listener_position,
+                        const WorldPosition& room_dimensions,
+                        const float* reflection_coefficients,
+                        std::vector<Reflection>* reflections);
+
+}  // namespace vraudio
+
+#endif  // RESONANCE_AUDIO_DSP_SHOE_BOX_ROOM_H_