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diff --git a/src/3rdparty/resonance-audio/resonance_audio/node/publisher_node.h b/src/3rdparty/resonance-audio/resonance_audio/node/publisher_node.h
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+++ b/src/3rdparty/resonance-audio/resonance_audio/node/publisher_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_PUBLISHER_NODE_H_
+#define RESONANCE_AUDIO_NODE_PUBLISHER_NODE_H_
+
+#include <memory>
+
+#include "base/logging.h"
+#include "node/node.h"
+
+namespace vraudio {
+
+// Interface for publisher nodes that declares helper methods required to
+// connect to a publisher node. All publishing nodes need to implement this
+// interface.
+//
+// @tparam OutputType Type of the output container being streamed.
+// @interface
+template <typename OutputType>
+class PublisherNode {
+ public:
+  virtual ~PublisherNode() {}
+
+  // Creates a shared pointer of the Node instance.
+  //
+  // @return Returns a shared pointer the of Node instance.
+  virtual std::shared_ptr<Node> GetSharedNodePtr() = 0;
+
+  // Get internal Node::Output instance.
+  //
+  // @return Returns a pointer to the internal Node::Output instance.
+  virtual Node::Output<OutputType>* GetOutput() = 0;
+};
+
+}  // namespace vraudio
+
+#endif  // RESONANCE_AUDIO_NODE_PUBLISHER_NODE_H_