Implement tail processing for AudioNodes

third_party/WebKit/Source/modules/webaudio/WaveShaperDSPKernel.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 33 matching lines @@
  public:
   explicit WaveShaperDSPKernel(WaveShaperProcessor*);
 
   // AudioDSPKernel
   void Process(const float* source,
                float* dest,
                size_t frames_to_process) override;
   void Reset() override;
   double TailTime() const override { return 0; }
   double LatencyTime() const override;
+  bool RequiresTailProcessing() const override;
 
   // Oversampling requires more resources, so let's only allocate them if
   // needed.
   void LazyInitializeOversampling();
 
  protected:
   // Apply the shaping curve.
   void ProcessCurve(const float* source, float* dest, size_t frames_to_process);
 
   // Use up-sampling, process at the higher sample-rate, then down-sample.
@@ skipping 13 matching lines @@
   std::unique_ptr<AudioFloatArray> temp_buffer2_;
   std::unique_ptr<UpSampler> up_sampler_;
   std::unique_ptr<DownSampler> down_sampler_;
   std::unique_ptr<UpSampler> up_sampler2_;
   std::unique_ptr<DownSampler> down_sampler2_;
 };
 
 }  // namespace blink
 
 #endif  // WaveShaperDSPKernel_h