Make sure AudioBufferConverter uses aligned AudioBus channels.

media/base/audio_buffer_converter_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/audio_buffer.h"
 #include "media/base/audio_buffer_converter.h"
 #include "media/base/sinc_resampler.h"
 #include "media/base/test_helpers.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
+// Important: Use an odd buffer size here so SIMD issues are caught.
+const int kOutFrameSize = 441;
 const int kOutSampleRate = 44100;
 const ChannelLayout kOutChannelLayout = CHANNEL_LAYOUT_STEREO;
 
 static scoped_refptr<AudioBuffer> MakeTestBuffer(int sample_rate,
                                                  ChannelLayout channel_layout,
                                                  int frames) {
   return MakeAudioBuffer<uint8>(kSampleFormatU8,
                                 channel_layout,
                                 sample_rate,
                                 0,
                                 1,
                                 frames,
                                 base::TimeDelta::FromSeconds(0),
                                 base::TimeDelta::FromSeconds(0));
 }
 
 class AudioBufferConverterTest : public ::testing::Test {
  public:
   AudioBufferConverterTest()
       : input_frames_(0), expected_output_frames_(0.0), output_frames_(0) {
     AudioParameters output_params(AudioParameters::AUDIO_PCM_LOW_LATENCY,
                                   kOutChannelLayout,
                                   kOutSampleRate,
                                   16,
-                                  512);
+                                  kOutFrameSize);
     audio_buffer_converter_.reset(new AudioBufferConverter(output_params));
   }
 
   void Reset() {
     audio_buffer_converter_->Reset();
     output_frames_ = expected_output_frames_ = input_frames_ = 0;
   }
 
   void AddInput(const scoped_refptr<AudioBuffer>& in) {
     if (!in->end_of_stream()) {
@@ skipping 127 matching lines @@
 
 TEST_F(AudioBufferConverterTest, ResetThenConvert) {
   AddInput(MakeTestBuffer(kOutSampleRate, kOutChannelLayout, 512));
   Reset();
   // Make sure we can keep using the AudioBufferConverter after we've Reset().
   AddInput(MakeTestBuffer(kOutSampleRate, kOutChannelLayout, 512));
   ConsumeAllOutput();
 }
 
 }  // namespace media