reflow comments in platform/audio

third_party/WebKit/Source/platform/audio/HRTFKernel.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
@@ skipping 18 matching lines @@
 #include "platform/audio/HRTFKernel.h"
 
 #include "platform/audio/AudioChannel.h"
 #include "wtf/MathExtras.h"
 #include "wtf/PtrUtil.h"
 #include <algorithm>
 #include <memory>
 
 namespace blink {
 
-// Takes the input AudioChannel as an input impulse response and calculates the average group delay.
-// This represents the initial delay before the most energetic part of the impulse response.
-// The sample-frame delay is removed from the impulseP impulse response, and this value  is returned.
-// the length of the passed in AudioChannel must be a power of 2.
+// Takes the input AudioChannel as an input impulse response and calculates the
+// average group delay.  This represents the initial delay before the most
+// energetic part of the impulse response.  The sample-frame delay is removed
+// from the impulseP impulse response, and this value  is returned.  The length
+// of the passed in AudioChannel must be a power of 2.
 static float extractAverageGroupDelay(AudioChannel* channel,
                                       size_t analysisFFTSize) {
   ASSERT(channel);
 
   float* impulseP = channel->mutableData();
 
   bool isSizeGood = channel->length() >= analysisFFTSize;
   ASSERT(isSizeGood);
   if (!isSizeGood)
     return 0;
@@ skipping 14 matching lines @@
 HRTFKernel::HRTFKernel(AudioChannel* channel, size_t fftSize, float sampleRate)
     : m_frameDelay(0), m_sampleRate(sampleRate) {
   ASSERT(channel);
 
   // Determine the leading delay (average group delay) for the response.
   m_frameDelay = extractAverageGroupDelay(channel, fftSize / 2);
 
   float* impulseResponse = channel->mutableData();
   size_t responseLength = channel->length();
 
-  // We need to truncate to fit into 1/2 the FFT size (with zero padding) in order to do proper convolution.
-  size_t truncatedResponseLength = std::min(
-      responseLength,
-      fftSize /
-          2);  // truncate if necessary to max impulse response length allowed by FFT
+  // We need to truncate to fit into 1/2 the FFT size (with zero padding) in
+  // order to do proper convolution.
+  // Truncate if necessary to max impulse response length allowed by FFT.
+  size_t truncatedResponseLength = std::min(responseLength, fftSize / 2);
 
   // Quick fade-out (apply window) at truncation point
   unsigned numberOfFadeOutFrames = static_cast<unsigned>(
       sampleRate / 4410);  // 10 sample-frames @44.1KHz sample-rate
   ASSERT(numberOfFadeOutFrames < truncatedResponseLength);
   if (numberOfFadeOutFrames < truncatedResponseLength) {
     for (unsigned i = truncatedResponseLength - numberOfFadeOutFrames;
          i < truncatedResponseLength; ++i) {
       float x = 1.0f -
                 static_cast<float>(
@@ skipping 41 matching lines @@
       (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay();
 
   std::unique_ptr<FFTFrame> interpolatedFrame =
       FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(),
                                         *kernel2->fftFrame(), x);
   return HRTFKernel::create(std::move(interpolatedFrame), frameDelay,
                             sampleRate1);
 }
 
 }  // namespace blink