Boilerplate code addition in order to be able to test upcoming AEC additions

webrtc/modules/audio_processing/include/audio_processing.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 51 matching lines @@
 //   the delay difference more heavily, and back off from the difference more.
 //   Adjustments force a readaptation of the filter, so they should be avoided
 //   except when really necessary.
 struct ExtendedFilter {
   ExtendedFilter() : enabled(false) {}
   explicit ExtendedFilter(bool enabled) : enabled(enabled) {}
   static const ConfigOptionID identifier = ConfigOptionID::kExtendedFilter;
   bool enabled;
 };
 
+// Enables the next generation AEC functionality. This feature replaces the
+// standard methods for echo removal in the AEC. This configuration only applies
+// to EchoCancellation and not EchoControlMobile. It can be set in the
+// constructor or using AudioProcessing::SetExtraOptions().
+struct NextGenerationAec {
+  NextGenerationAec() : enabled(false) {}
+  explicit NextGenerationAec(bool enabled) : enabled(enabled) {}
+  static const ConfigOptionID identifier = ConfigOptionID::kNextGenerationAec;
+  bool enabled;
+};
+
 // Enables delay-agnostic echo cancellation. This feature relies on internally
 // estimated delays between the process and reverse streams, thus not relying
 // on reported system delays. This configuration only applies to
 // EchoCancellation and not EchoControlMobile. It can be set in the constructor
 // or using AudioProcessing::SetExtraOptions().
 struct DelayAgnostic {
   DelayAgnostic() : enabled(false) {}
   explicit DelayAgnostic(bool enabled) : enabled(enabled) {}
   static const ConfigOptionID identifier = ConfigOptionID::kDelayAgnostic;
   bool enabled;
@@ skipping 885 matching lines @@
   // This does not impact the size of frames passed to |ProcessStream()|.
   virtual int set_frame_size_ms(int size) = 0;
   virtual int frame_size_ms() const = 0;
 
  protected:
   virtual ~VoiceDetection() {}
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_INCLUDE_AUDIO_PROCESSING_H_