Allow audio system to handle synchronized low-latency audio I/O

media/audio/mac/audio_output_mac_unittest.cc

 // Copyright (c) 2012 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/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/simple_sources.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::AnyNumber;
 using ::testing::DoAll;
 using ::testing::Field;
 using ::testing::InSequence;
 using ::testing::Invoke;
 using ::testing::NiceMock;
 using ::testing::NotNull;
 using ::testing::Return;
 
 namespace media {
 
 class MockAudioSource : public AudioOutputStream::AudioSourceCallback {
  public:
   MOCK_METHOD2(OnMoreData, int(AudioBus* audio_bus,
                                AudioBuffersState buffers_state));
+  MOCK_METHOD3(OnMoreIOData, int(AudioBus* source,
+                                 AudioBus* dest,
+                                 AudioBuffersState buffers_state));
   MOCK_METHOD2(OnError, void(AudioOutputStream* stream, int code));
 };
 
 // ===========================================================================
 // Validation of AudioParameters::AUDIO_PCM_LINEAR
 //
 
 // Test that can it be created and closed.
 TEST(MacAudioTest, PCMWaveStreamGetAndClose) {
   scoped_ptr<AudioManager> audio_man(AudioManager::Create());
@@ skipping 114 matching lines @@
       .Times(AnyNumber())
       .WillRepeatedly(Return(0));
 
   oas->Start(&source);
   usleep(500000);
   oas->Stop();
   oas->Close();
 }
 
 }  // namespace media