Implement tail processing for AudioNodes

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

 /*
  * 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 162 matching lines @@
 
 void WaveShaperDSPKernel::Reset() {
   if (up_sampler_) {
     up_sampler_->Reset();
     down_sampler_->Reset();
     up_sampler2_->Reset();
     down_sampler2_->Reset();
   }
 }
 
+bool WaveShaperDSPKernel::RequiresTailProcessing() const {
+  // Always return true even if the tail time and latency might both
+  // be zero.
+  return true;
+}
+
 double WaveShaperDSPKernel::LatencyTime() const {
   size_t latency_frames = 0;
   WaveShaperDSPKernel* kernel = const_cast<WaveShaperDSPKernel*>(this);
 
   switch (kernel->GetWaveShaperProcessor()->Oversample()) {
     case WaveShaperProcessor::kOverSampleNone:
       break;
     case WaveShaperProcessor::kOverSample2x:
       latency_frames += up_sampler_->LatencyFrames();
       latency_frames += down_sampler_->LatencyFrames();
@@ skipping 11 matching lines @@
       break;
     }
     default:
       NOTREACHED();
   }
 
   return static_cast<double>(latency_frames) / SampleRate();
 }
 
 }  // namespace blink