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diff --git a/src/3rdparty/resonance-audio/resonance_audio/node/sink_node.h b/src/3rdparty/resonance-audio/resonance_audio/node/sink_node.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_NODE_SINK_NODE_H_
+#define RESONANCE_AUDIO_NODE_SINK_NODE_H_
+
+#include <memory>
+#include <vector>
+
+#include "base/audio_buffer.h"
+#include "node/publisher_node.h"
+#include "node/subscriber_node.h"
+
+namespace vraudio {
+
+// Audio sink node that reads from multiple inputs.
+class SinkNode : public Node, public SubscriberNode<const AudioBuffer*> {
+ public:
+  typedef PublisherNode<const AudioBuffer*> PublisherNodeType;
+
+  SinkNode();
+
+  // Polls for data on all inputs of the sink node.
+  //
+  // @return A vector of input data.
+  const std::vector<const AudioBuffer*>& ReadInputs();
+
+  // SubscriberNode<AudioBuffer> implementation.
+  void Connect(
+      const std::shared_ptr<PublisherNodeType>& publisher_node) override;
+
+  // Node implementation.
+  void Process() final;
+  bool CleanUp() final;
+
+  // Disable copy constructor.
+  SinkNode(const SinkNode& that) = delete;
+
+ private:
+  // Input stream to poll for incoming data.
+  Node::Input<const AudioBuffer*> input_stream_;
+};
+
+}  // namespace vraudio
+
+#endif  // RESONANCE_AUDIO_NODE_SINK_NODE_H_