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

media/audio/audio_output_proxy_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 <string>
 
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/simple_thread.h"
@@ skipping 73 matching lines @@
       media::AudioDeviceNames* device_name));
   MOCK_METHOD0(IsRecordingInProcess, bool());
 };
 
 class MockAudioSourceCallback : public AudioOutputStream::AudioSourceCallback {
  public:
   int OnMoreData(AudioBus* audio_bus, AudioBuffersState buffers_state) {
     audio_bus->Zero();
     return audio_bus->frames();
   }
+  MOCK_METHOD3(OnMoreIOData, int(AudioBus* source,
+                                 AudioBus* dest,
+                                 AudioBuffersState buffers_state));
   MOCK_METHOD2(OnError, void(AudioOutputStream* stream, int code));
 };
 
 // Simple class for repeatedly calling OnMoreData() to expose shutdown issues
 // with AudioSourceCallback users.
 class AudioThreadRunner : public base::DelegateSimpleThread::Delegate {
  public:
   AudioThreadRunner(AudioOutputStream::AudioSourceCallback* callback,
                    base::TimeDelta delay, const AudioParameters& params)
       : delay_(delay),
@@ skipping 673 matching lines @@
   proxy2->Close();
   WaitForCloseTimer(kTestCloseDelayMs);
 }
 #endif
 
 TEST_F(AudioOutputResamplerTest, StartFailed) {
   StartFailed(resampler_);
 }
 
 }  // namespace media