Implement tail processing for AudioNodes

third_party/WebKit/Source/platform/audio/DynamicsCompressorKernel.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 56 matching lines @@
                float release_zone4);
 
   void Reset();
 
   unsigned LatencyFrames() const { return last_pre_delay_frames_; }
 
   float SampleRate() const { return sample_rate_; }
 
   float MeteringGain() const { return metering_gain_; }
 
+  double TailTime() const;
+
  protected:
   float sample_rate_;
 
   float detector_average_;
   float compressor_gain_;
 
   // Metering
   float metering_release_k_;
   float metering_gain_;
 
@@ skipping 43 matching lines @@
   float knee_threshold_db_;
   float yknee_threshold_db_;
 
   // Internal parameter for the knee portion of the curve.
   float knee_;
 };
 
 }  // namespace blink
 
 #endif  // DynamicsCompressorKernel_h