Support for AudioContextOptions latencyHint.

third_party/WebKit/Source/modules/webaudio/AudioNode.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 154 matching lines @@
   unsigned numberOfOutputs() const { return m_outputs.size(); }
 
   // Number of output channels.  This only matters for ScriptProcessorNodes.
   virtual unsigned numberOfOutputChannels() const;
 
   // The argument must be less than numberOfInputs().
   AudioNodeInput& input(unsigned);
   // The argument must be less than numberOfOutputs().
   AudioNodeOutput& output(unsigned);
 
-  virtual float sampleRate() const { return m_sampleRate; }
-
   // processIfNecessary() is called by our output(s) when the rendering graph
   // needs this AudioNode to process.  This method ensures that the AudioNode
   // will only process once per rendering time quantum even if it's called
   // repeatedly.  This handles the case of "fanout" where an output is connected
   // to multiple AudioNode inputs.  Called from context's audio thread.
   void processIfNecessary(size_t framesToProcess);
 
   // Called when a new connection has been made to one of our inputs or the
   // connection number of channels has changed.  This potentially gives us
   // enough information to perform a lazy initialization or, if necessary, a
@@ skipping 78 matching lines @@
   // m_node directly, use node() instead.
   // See http://crbug.com/404527 for the detail.
   UntracedMember<AudioNode> m_node;
 
   // This untraced member is safe because this is cleared for all of live
   // AudioHandlers when the BaseAudioContext dies.  Do not access m_context
   // directly, use context() instead.
   // See http://crbug.com/404527 for the detail.
   UntracedMember<BaseAudioContext> m_context;
 
-  float m_sampleRate;
   Vector<std::unique_ptr<AudioNodeInput>> m_inputs;
   Vector<std::unique_ptr<AudioNodeOutput>> m_outputs;
 
   double m_lastProcessingTime;
   double m_lastNonSilentTime;
 
   volatile int m_connectionRefCount;
 
   bool m_isDisabled;
 
@@ skipping 89 matching lines @@
   HeapVector<Member<HeapHashSet<Member<AudioNode>>>> m_connectedNodes;
   // Represents audio node graph with Oilpan references. N-th HeapHashSet
   // represents a set of AudioParam objects connected to this AudioNode's N-th
   // output.
   HeapVector<Member<HeapHashSet<Member<AudioParam>>>> m_connectedParams;
 };
 
 }  // namespace blink
 
 #endif  // AudioNode_h