1 files changed, 44 insertions, 0 deletions
diff --git a/src/3rdparty/resonance-audio/resonance_audio/graph/mono_from_soundfield_node.h b/src/3rdparty/resonance-audio/resonance_audio/graph/mono_from_soundfield_node.h
new file mode 100644
index 000000000..6e8525e17
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+++ b/src/3rdparty/resonance-audio/resonance_audio/graph/mono_from_soundfield_node.h
@@ -0,0 +1,44 @@
+/*
+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_GRAPH_MONO_FROM_SOUNDFIELD_NODE_H_
+#define RESONANCE_AUDIO_GRAPH_MONO_FROM_SOUNDFIELD_NODE_H_
+
+#include "base/audio_buffer.h"
+#include "graph/system_settings.h"
+#include "node/processing_node.h"
+
+namespace vraudio {
+
+// Node that accepts an ambisonic buffer as input and extracts its W channel
+// onto a mono output buffer.
+class MonoFromSoundfieldNode : public ProcessingNode {
+ public:
+  MonoFromSoundfieldNode(SourceId source_id,
+                         const SystemSettings& system_settings);
+
+ protected:
+  // Implements |ProcessingNode|.
+  const AudioBuffer* AudioProcess(const NodeInput& input) override;
+
+ private:
+  // Mono audio buffer to store output data.
+  AudioBuffer output_buffer_;
+};
+
+}  // namespace vraudio
+
+#endif  // RESONANCE_AUDIO_GRAPH_MONO_FROM_SOUNDFIELD_NODE_H_