Implement tail processing for AudioNodes

third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.cpp

 /*
  * 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 289 matching lines @@
     // is locked by the waitable event.
     double playback_time = (Context()->CurrentSampleFrame() + buffer_size_) /
                            static_cast<double>(Context()->sampleRate());
     GetNode()->DispatchEvent(AudioProcessingEvent::Create(
         input_buffer, output_buffer, playback_time));
   }
 
   waitable_event->Signal();
 }
 
+bool ScriptProcessorHandler::RequiresTailProcessing() const {
+  // Always return true since the tail and latency are never zero.
+  return true;
+}
+
 double ScriptProcessorHandler::TailTime() const {
   return std::numeric_limits<double>::infinity();
 }
 
 double ScriptProcessorHandler::LatencyTime() const {
   return std::numeric_limits<double>::infinity();
 }
 
 void ScriptProcessorHandler::SetChannelCount(unsigned long channel_count,
                                              ExceptionState& exception_state) {
@@ skipping 172 matching lines @@
 
   // If |onaudioprocess| event handler is defined, the node should not be
   // GCed even if it is out of scope.
   if (HasEventListeners(EventTypeNames::audioprocess))
     return true;
 
   return false;
 }
 
 }  // namespace blink