Implement tail processing for AudioNodes

third_party/WebKit/Source/modules/webaudio/ChannelMergerNode.h

 /*
  * Copyright (C) 2010 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 29 matching lines @@
 class ChannelMergerHandler final : public AudioHandler {
  public:
   static PassRefPtr<ChannelMergerHandler> Create(AudioNode&,
                                                  float sample_rate,
                                                  unsigned number_of_inputs);
 
   void Process(size_t frames_to_process) override;
   void SetChannelCount(unsigned long, ExceptionState&) final;
   void SetChannelCountMode(const String&, ExceptionState&) final;
 
-  // AudioNode
   double TailTime() const override { return 0; }
   double LatencyTime() const override { return 0; }
+  bool RequiresTailProcessing() const override { return false; }
 
  private:
   ChannelMergerHandler(AudioNode&,
                        float sample_rate,
                        unsigned number_of_inputs);
 };
 
 class ChannelMergerNode final : public AudioNode {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static ChannelMergerNode* Create(BaseAudioContext&, ExceptionState&);
   static ChannelMergerNode* Create(BaseAudioContext&,
                                    unsigned number_of_inputs,
                                    ExceptionState&);
   static ChannelMergerNode* Create(BaseAudioContext*,
                                    const ChannelMergerOptions&,
                                    ExceptionState&);
 
  private:
   ChannelMergerNode(BaseAudioContext&, unsigned number_of_inputs);
 };
 
 }  // namespace blink
 
 #endif  // ChannelMergerNode_h