media/audio/audio_output_proxy_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <string>
   6
   7 #include "base/message_loop/message_loop.h"
   8 #include "base/run_loop.h"
   9 #include "media/audio/audio_manager.h"
  10 #include "media/audio/audio_manager_base.h"
  11 #include "media/audio/audio_output_dispatcher_impl.h"
  12 #include "media/audio/audio_output_proxy.h"
  13 #include "media/audio/audio_output_resampler.h"
  14 #include "media/audio/fake_audio_log_factory.h"
  15 #include "media/audio/fake_audio_output_stream.h"
  16 #include "testing/gmock/include/gmock/gmock.h"
  17 #include "testing/gtest/include/gtest/gtest.h"
  18
  19 using ::testing::_;
  20 using ::testing::AllOf;
  21 using ::testing::DoAll;
  22 using ::testing::Field;
  23 using ::testing::Mock;
  24 using ::testing::NotNull;
  25 using ::testing::Return;
  26 using ::testing::SetArrayArgument;
  27 using media::AudioBus;
  28 using media::AudioInputStream;
  29 using media::AudioManager;
  30 using media::AudioManagerBase;
  31 using media::AudioOutputDispatcher;
  32 using media::AudioOutputProxy;
  33 using media::AudioOutputStream;
  34 using media::AudioParameters;
  35 using media::FakeAudioOutputStream;
  36
  37 namespace {
  38
  39 static const int kTestCloseDelayMs = 10;
  40
  41 // Delay between callbacks to AudioSourceCallback::OnMoreData.
  42 static const int kOnMoreDataCallbackDelayMs = 10;
  43
  44 // Let start run long enough for many OnMoreData callbacks to occur.
  45 static const int kStartRunTimeMs = kOnMoreDataCallbackDelayMs * 10;
  46
  47 class MockAudioOutputStream : public AudioOutputStream {
  48  public:
  49   MockAudioOutputStream(AudioManagerBase* manager,
  50                         const AudioParameters& params)
  51       : start_called_(false),
  52         stop_called_(false),
  53         params_(params),
  54         fake_output_stream_(
  55             FakeAudioOutputStream::MakeFakeStream(manager, params_)) {
  56   }
  57
  58   void Start(AudioSourceCallback* callback) {
  59     start_called_ = true;
  60     fake_output_stream_->Start(callback);
  61   }
  62
  63   void Stop() {
  64     stop_called_ = true;
  65     fake_output_stream_->Stop();
  66   }
  67
  68   ~MockAudioOutputStream() {}
  69
  70   bool start_called() { return start_called_; }
  71   bool stop_called() { return stop_called_; }
  72
  73   MOCK_METHOD0(Open, bool());
  74   MOCK_METHOD1(SetVolume, void(double volume));
  75   MOCK_METHOD1(GetVolume, void(double* volume));
  76   MOCK_METHOD0(Close, void());
  77
  78  private:
  79   bool start_called_;
  80   bool stop_called_;
  81   AudioParameters params_;
  82   scoped_ptr<AudioOutputStream> fake_output_stream_;
  83 };
  84
  85 class MockAudioManager : public AudioManagerBase {
  86  public:
  87   MockAudioManager() : AudioManagerBase(&fake_audio_log_factory_) {}
  88   virtual ~MockAudioManager() {
  89     Shutdown();
  90   }
  91
  92   MOCK_METHOD0(HasAudioOutputDevices, bool());
  93   MOCK_METHOD0(HasAudioInputDevices, bool());
  94   MOCK_METHOD0(GetAudioInputDeviceModel, base::string16());
  95   MOCK_METHOD2(MakeAudioOutputStream, AudioOutputStream*(
  96       const AudioParameters& params,
  97       const std::string& device_id));
  98   MOCK_METHOD2(MakeAudioOutputStreamProxy, AudioOutputStream*(
  99       const AudioParameters& params,
 100       const std::string& device_id));
 101   MOCK_METHOD2(MakeAudioInputStream, AudioInputStream*(
 102       const AudioParameters& params, const std::string& device_id));
 103   MOCK_METHOD0(ShowAudioInputSettings, void());
 104   MOCK_METHOD0(GetTaskRunner, scoped_refptr<base::SingleThreadTaskRunner>());
 105   MOCK_METHOD0(GetWorkerTaskRunner,
 106                scoped_refptr<base::SingleThreadTaskRunner>());
 107   MOCK_METHOD1(GetAudioInputDeviceNames, void(
 108       media::AudioDeviceNames* device_name));
 109
 110   MOCK_METHOD1(MakeLinearOutputStream, AudioOutputStream*(
 111       const AudioParameters& params));
 112   MOCK_METHOD2(MakeLowLatencyOutputStream, AudioOutputStream*(
 113       const AudioParameters& params, const std::string& device_id));
 114   MOCK_METHOD2(MakeLinearInputStream, AudioInputStream*(
 115       const AudioParameters& params, const std::string& device_id));
 116   MOCK_METHOD2(MakeLowLatencyInputStream, AudioInputStream*(
 117       const AudioParameters& params, const std::string& device_id));
 118   MOCK_METHOD2(GetPreferredOutputStreamParameters, AudioParameters(
 119       const std::string& device_id, const AudioParameters& params));
 120
 121  private:
 122   media::FakeAudioLogFactory fake_audio_log_factory_;
 123 };
 124
 125 class MockAudioSourceCallback : public AudioOutputStream::AudioSourceCallback {
 126  public:
 127   int OnMoreData(AudioBus* audio_bus, uint32 total_bytes_delay) {
 128     audio_bus->Zero();
 129     return audio_bus->frames();
 130   }
 131   MOCK_METHOD1(OnError, void(AudioOutputStream* stream));
 132 };
 133
 134 }  // namespace
 135
 136 namespace media {
 137
 138 class AudioOutputProxyTest : public testing::Test {
 139  protected:
 140   void SetUp() override {
 141     EXPECT_CALL(manager_, GetTaskRunner())
 142         .WillRepeatedly(Return(message_loop_.message_loop_proxy()));
 143     EXPECT_CALL(manager_, GetWorkerTaskRunner())
 144         .WillRepeatedly(Return(message_loop_.message_loop_proxy()));
 145     // Use a low sample rate and large buffer size when testing otherwise the
 146     // FakeAudioOutputStream will keep the message loop busy indefinitely; i.e.,
 147     // RunUntilIdle() will never terminate.
 148     params_ = AudioParameters(AudioParameters::AUDIO_PCM_LINEAR,
 149                               CHANNEL_LAYOUT_STEREO, 8000, 16, 2048);
 150     InitDispatcher(base::TimeDelta::FromMilliseconds(kTestCloseDelayMs));
 151   }
 152
 153   void TearDown() override {
 154     // This is necessary to free all proxy objects that have been
 155     // closed by the test.
 156     message_loop_.RunUntilIdle();
 157   }
 158
 159   virtual void InitDispatcher(base::TimeDelta close_delay) {
 160     dispatcher_impl_ = new AudioOutputDispatcherImpl(&manager(),
 161                                                      params_,
 162                                                      std::string(),
 163                                                      close_delay);
 164   }
 165
 166   virtual void OnStart() {}
 167
 168   MockAudioManager& manager() {
 169     return manager_;
 170   }
 171
 172   void WaitForCloseTimer(MockAudioOutputStream* stream) {
 173     base::RunLoop run_loop;
 174     EXPECT_CALL(*stream, Close())
 175         .WillOnce(testing::InvokeWithoutArgs(&run_loop, &base::RunLoop::Quit));
 176     run_loop.Run();
 177   }
 178
 179   void CloseAndWaitForCloseTimer(AudioOutputProxy* proxy,
 180                                  MockAudioOutputStream* stream) {
 181     // Close the stream and verify it doesn't happen immediately.
 182     proxy->Close();
 183     Mock::VerifyAndClear(stream);
 184
 185     // Wait for the actual close event to come from the close timer.
 186     WaitForCloseTimer(stream);
 187   }
 188
 189   // Basic Open() and Close() test.
 190   void OpenAndClose(AudioOutputDispatcher* dispatcher) {
 191     MockAudioOutputStream stream(&manager_, params_);
 192
 193     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 194         .WillOnce(Return(&stream));
 195     EXPECT_CALL(stream, Open())
 196         .WillOnce(Return(true));
 197
 198     AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher);
 199     EXPECT_TRUE(proxy->Open());
 200     CloseAndWaitForCloseTimer(proxy, &stream);
 201   }
 202
 203   // Creates a stream, and then calls Start() and Stop().
 204   void StartAndStop(AudioOutputDispatcher* dispatcher) {
 205     MockAudioOutputStream stream(&manager_, params_);
 206
 207     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 208         .WillOnce(Return(&stream));
 209     EXPECT_CALL(stream, Open())
 210         .WillOnce(Return(true));
 211     EXPECT_CALL(stream, SetVolume(_))
 212         .Times(1);
 213
 214     AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher);
 215     EXPECT_TRUE(proxy->Open());
 216
 217     proxy->Start(&callback_);
 218     OnStart();
 219     proxy->Stop();
 220
 221     CloseAndWaitForCloseTimer(proxy, &stream);
 222     EXPECT_TRUE(stream.stop_called());
 223     EXPECT_TRUE(stream.start_called());
 224   }
 225
 226   // Verify that the stream is closed after Stop() is called.
 227   void CloseAfterStop(AudioOutputDispatcher* dispatcher) {
 228     MockAudioOutputStream stream(&manager_, params_);
 229
 230     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 231         .WillOnce(Return(&stream));
 232     EXPECT_CALL(stream, Open())
 233         .WillOnce(Return(true));
 234     EXPECT_CALL(stream, SetVolume(_))
 235         .Times(1);
 236
 237     AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher);
 238     EXPECT_TRUE(proxy->Open());
 239
 240     proxy->Start(&callback_);
 241     OnStart();
 242     proxy->Stop();
 243
 244     // Wait for the close timer to fire after StopStream().
 245     WaitForCloseTimer(&stream);
 246     proxy->Close();
 247     EXPECT_TRUE(stream.stop_called());
 248     EXPECT_TRUE(stream.start_called());
 249   }
 250
 251   // Create two streams, but don't start them.  Only one device must be opened.
 252   void TwoStreams(AudioOutputDispatcher* dispatcher) {
 253     MockAudioOutputStream stream(&manager_, params_);
 254
 255     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 256         .WillOnce(Return(&stream));
 257     EXPECT_CALL(stream, Open())
 258         .WillOnce(Return(true));
 259
 260     AudioOutputProxy* proxy1 = new AudioOutputProxy(dispatcher);
 261     AudioOutputProxy* proxy2 = new AudioOutputProxy(dispatcher);
 262     EXPECT_TRUE(proxy1->Open());
 263     EXPECT_TRUE(proxy2->Open());
 264     proxy1->Close();
 265     CloseAndWaitForCloseTimer(proxy2, &stream);
 266     EXPECT_FALSE(stream.stop_called());
 267     EXPECT_FALSE(stream.start_called());
 268   }
 269
 270   // Open() method failed.
 271   void OpenFailed(AudioOutputDispatcher* dispatcher) {
 272     MockAudioOutputStream stream(&manager_, params_);
 273
 274     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 275         .WillOnce(Return(&stream));
 276     EXPECT_CALL(stream, Open())
 277         .WillOnce(Return(false));
 278     EXPECT_CALL(stream, Close())
 279         .Times(1);
 280
 281     AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher);
 282     EXPECT_FALSE(proxy->Open());
 283     proxy->Close();
 284     EXPECT_FALSE(stream.stop_called());
 285     EXPECT_FALSE(stream.start_called());
 286   }
 287
 288   void CreateAndWait(AudioOutputDispatcher* dispatcher) {
 289     MockAudioOutputStream stream(&manager_, params_);
 290
 291     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 292         .WillOnce(Return(&stream));
 293     EXPECT_CALL(stream, Open())
 294         .WillOnce(Return(true));
 295
 296     AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher);
 297     EXPECT_TRUE(proxy->Open());
 298
 299     WaitForCloseTimer(&stream);
 300     proxy->Close();
 301     EXPECT_FALSE(stream.stop_called());
 302     EXPECT_FALSE(stream.start_called());
 303   }
 304
 305   void OneStream_TwoPlays(AudioOutputDispatcher* dispatcher) {
 306     MockAudioOutputStream stream(&manager_, params_);
 307
 308     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 309         .WillOnce(Return(&stream));
 310
 311     EXPECT_CALL(stream, Open())
 312         .WillOnce(Return(true));
 313     EXPECT_CALL(stream, SetVolume(_))
 314         .Times(2);
 315
 316     AudioOutputProxy* proxy1 = new AudioOutputProxy(dispatcher);
 317     EXPECT_TRUE(proxy1->Open());
 318
 319     proxy1->Start(&callback_);
 320     OnStart();
 321     proxy1->Stop();
 322
 323     // The stream should now be idle and get reused by |proxy2|.
 324     AudioOutputProxy* proxy2 = new AudioOutputProxy(dispatcher);
 325     EXPECT_TRUE(proxy2->Open());
 326     proxy2->Start(&callback_);
 327     OnStart();
 328     proxy2->Stop();
 329
 330     proxy1->Close();
 331     CloseAndWaitForCloseTimer(proxy2, &stream);
 332     EXPECT_TRUE(stream.stop_called());
 333     EXPECT_TRUE(stream.start_called());
 334   }
 335
 336   void TwoStreams_BothPlaying(AudioOutputDispatcher* dispatcher) {
 337     MockAudioOutputStream stream1(&manager_, params_);
 338     MockAudioOutputStream stream2(&manager_, params_);
 339
 340     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 341         .WillOnce(Return(&stream1))
 342         .WillOnce(Return(&stream2));
 343
 344     EXPECT_CALL(stream1, Open())
 345         .WillOnce(Return(true));
 346     EXPECT_CALL(stream1, SetVolume(_))
 347         .Times(1);
 348
 349     EXPECT_CALL(stream2, Open())
 350         .WillOnce(Return(true));
 351     EXPECT_CALL(stream2, SetVolume(_))
 352         .Times(1);
 353
 354     AudioOutputProxy* proxy1 = new AudioOutputProxy(dispatcher);
 355     AudioOutputProxy* proxy2 = new AudioOutputProxy(dispatcher);
 356     EXPECT_TRUE(proxy1->Open());
 357     EXPECT_TRUE(proxy2->Open());
 358
 359     proxy1->Start(&callback_);
 360     proxy2->Start(&callback_);
 361     OnStart();
 362     proxy1->Stop();
 363     CloseAndWaitForCloseTimer(proxy1, &stream1);
 364
 365     proxy2->Stop();
 366     CloseAndWaitForCloseTimer(proxy2, &stream2);
 367
 368     EXPECT_TRUE(stream1.stop_called());
 369     EXPECT_TRUE(stream1.start_called());
 370     EXPECT_TRUE(stream2.stop_called());
 371     EXPECT_TRUE(stream2.start_called());
 372   }
 373
 374   void StartFailed(AudioOutputDispatcher* dispatcher) {
 375     MockAudioOutputStream stream(&manager_, params_);
 376
 377     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 378         .WillOnce(Return(&stream));
 379     EXPECT_CALL(stream, Open())
 380         .WillOnce(Return(true));
 381
 382     AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher);
 383     EXPECT_TRUE(proxy->Open());
 384
 385     WaitForCloseTimer(&stream);
 386
 387     // |stream| is closed at this point. Start() should reopen it again.
 388     EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 389         .Times(2)
 390         .WillRepeatedly(Return(reinterpret_cast<AudioOutputStream*>(NULL)));
 391
 392     EXPECT_CALL(callback_, OnError(_))
 393         .Times(2);
 394
 395     proxy->Start(&callback_);
 396
 397     // Double Start() in the error case should be allowed since it's possible a
 398     // callback may not have had time to process the OnError() in between.
 399     proxy->Stop();
 400     proxy->Start(&callback_);
 401
 402     Mock::VerifyAndClear(&callback_);
 403
 404     proxy->Close();
 405   }
 406
 407   base::MessageLoop message_loop_;
 408   scoped_refptr<AudioOutputDispatcherImpl> dispatcher_impl_;
 409   MockAudioManager manager_;
 410   MockAudioSourceCallback callback_;
 411   AudioParameters params_;
 412 };
 413
 414 class AudioOutputResamplerTest : public AudioOutputProxyTest {
 415  public:
 416   void TearDown() override { AudioOutputProxyTest::TearDown(); }
 417
 418   void InitDispatcher(base::TimeDelta close_delay) override {
 419     // Use a low sample rate and large buffer size when testing otherwise the
 420     // FakeAudioOutputStream will keep the message loop busy indefinitely; i.e.,
 421     // RunUntilIdle() will never terminate.
 422     resampler_params_ = AudioParameters(
 423         AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
 424         16000, 16, 1024);
 425     resampler_ = new AudioOutputResampler(
 426         &manager(), params_, resampler_params_, std::string(), close_delay);
 427   }
 428
 429   void OnStart() override {
 430     // Let Start() run for a bit.
 431     base::RunLoop run_loop;
 432     message_loop_.PostDelayedTask(
 433         FROM_HERE,
 434         run_loop.QuitClosure(),
 435         base::TimeDelta::FromMilliseconds(kStartRunTimeMs));
 436     run_loop.Run();
 437   }
 438
 439  protected:
 440   AudioParameters resampler_params_;
 441   scoped_refptr<AudioOutputResampler> resampler_;
 442 };
 443
 444 TEST_F(AudioOutputProxyTest, CreateAndClose) {
 445   AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_impl_.get());
 446   proxy->Close();
 447 }
 448
 449 TEST_F(AudioOutputResamplerTest, CreateAndClose) {
 450   AudioOutputProxy* proxy = new AudioOutputProxy(resampler_.get());
 451   proxy->Close();
 452 }
 453
 454 TEST_F(AudioOutputProxyTest, OpenAndClose) {
 455   OpenAndClose(dispatcher_impl_.get());
 456 }
 457
 458 TEST_F(AudioOutputResamplerTest, OpenAndClose) {
 459   OpenAndClose(resampler_.get());
 460 }
 461
 462 // Create a stream, and verify that it is closed after kTestCloseDelayMs.
 463 // if it doesn't start playing.
 464 TEST_F(AudioOutputProxyTest, CreateAndWait) {
 465   CreateAndWait(dispatcher_impl_.get());
 466 }
 467
 468 // Create a stream, and verify that it is closed after kTestCloseDelayMs.
 469 // if it doesn't start playing.
 470 TEST_F(AudioOutputResamplerTest, CreateAndWait) {
 471   CreateAndWait(resampler_.get());
 472 }
 473
 474 TEST_F(AudioOutputProxyTest, StartAndStop) {
 475   StartAndStop(dispatcher_impl_.get());
 476 }
 477
 478 TEST_F(AudioOutputResamplerTest, StartAndStop) {
 479   StartAndStop(resampler_.get());
 480 }
 481
 482 TEST_F(AudioOutputProxyTest, CloseAfterStop) {
 483   CloseAfterStop(dispatcher_impl_.get());
 484 }
 485
 486 TEST_F(AudioOutputResamplerTest, CloseAfterStop) {
 487   CloseAfterStop(resampler_.get());
 488 }
 489
 490 TEST_F(AudioOutputProxyTest, TwoStreams) {
 491   TwoStreams(dispatcher_impl_.get());
 492 }
 493
 494 TEST_F(AudioOutputResamplerTest, TwoStreams) {
 495   TwoStreams(resampler_.get());
 496 }
 497
 498 // Two streams: verify that second stream is allocated when the first
 499 // starts playing.
 500 TEST_F(AudioOutputProxyTest, OneStream_TwoPlays) {
 501   OneStream_TwoPlays(dispatcher_impl_.get());
 502 }
 503
 504 TEST_F(AudioOutputResamplerTest, OneStream_TwoPlays) {
 505   OneStream_TwoPlays(resampler_.get());
 506 }
 507
 508 // Two streams, both are playing. Dispatcher should not open a third stream.
 509 TEST_F(AudioOutputProxyTest, TwoStreams_BothPlaying) {
 510   TwoStreams_BothPlaying(dispatcher_impl_.get());
 511 }
 512
 513 TEST_F(AudioOutputResamplerTest, TwoStreams_BothPlaying) {
 514   TwoStreams_BothPlaying(resampler_.get());
 515 }
 516
 517 TEST_F(AudioOutputProxyTest, OpenFailed) {
 518   OpenFailed(dispatcher_impl_.get());
 519 }
 520
 521 // Start() method failed.
 522 TEST_F(AudioOutputProxyTest, StartFailed) {
 523   StartFailed(dispatcher_impl_.get());
 524 }
 525
 526 TEST_F(AudioOutputResamplerTest, StartFailed) {
 527   StartFailed(resampler_.get());
 528 }
 529
 530 // Simulate AudioOutputStream::Create() failure with a low latency stream and
 531 // ensure AudioOutputResampler falls back to the high latency path.
 532 TEST_F(AudioOutputResamplerTest, LowLatencyCreateFailedFallback) {
 533   MockAudioOutputStream stream(&manager_, params_);
 534   EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 535       .Times(2)
 536       .WillOnce(Return(static_cast<AudioOutputStream*>(NULL)))
 537       .WillRepeatedly(Return(&stream));
 538   EXPECT_CALL(stream, Open())
 539       .WillOnce(Return(true));
 540
 541   AudioOutputProxy* proxy = new AudioOutputProxy(resampler_.get());
 542   EXPECT_TRUE(proxy->Open());
 543   CloseAndWaitForCloseTimer(proxy, &stream);
 544 }
 545
 546 // Simulate AudioOutputStream::Open() failure with a low latency stream and
 547 // ensure AudioOutputResampler falls back to the high latency path.
 548 TEST_F(AudioOutputResamplerTest, LowLatencyOpenFailedFallback) {
 549   MockAudioOutputStream failed_stream(&manager_, params_);
 550   MockAudioOutputStream okay_stream(&manager_, params_);
 551   EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 552       .Times(2)
 553       .WillOnce(Return(&failed_stream))
 554       .WillRepeatedly(Return(&okay_stream));
 555   EXPECT_CALL(failed_stream, Open())
 556       .WillOnce(Return(false));
 557   EXPECT_CALL(failed_stream, Close())
 558       .Times(1);
 559   EXPECT_CALL(okay_stream, Open())
 560       .WillOnce(Return(true));
 561
 562   AudioOutputProxy* proxy = new AudioOutputProxy(resampler_.get());
 563   EXPECT_TRUE(proxy->Open());
 564   CloseAndWaitForCloseTimer(proxy, &okay_stream);
 565 }
 566
 567 // Simulate failures to open both the low latency and the fallback high latency
 568 // stream and ensure AudioOutputResampler falls back to a fake stream.
 569 TEST_F(AudioOutputResamplerTest, HighLatencyFallbackFailed) {
 570   MockAudioOutputStream okay_stream(&manager_, params_);
 571
 572 // Only Windows has a high latency output driver that is not the same as the low
 573 // latency path.
 574 #if defined(OS_WIN)
 575   static const int kFallbackCount = 2;
 576 #else
 577   static const int kFallbackCount = 1;
 578 #endif
 579   EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 580       .Times(kFallbackCount)
 581       .WillRepeatedly(Return(static_cast<AudioOutputStream*>(NULL)));
 582
 583   // To prevent shared memory issues the sample rate and buffer size should
 584   // match the input stream parameters.
 585   EXPECT_CALL(manager(), MakeAudioOutputStream(AllOf(
 586       testing::Property(&AudioParameters::format, AudioParameters::AUDIO_FAKE),
 587       testing::Property(&AudioParameters::sample_rate, params_.sample_rate()),
 588       testing::Property(
 589           &AudioParameters::frames_per_buffer, params_.frames_per_buffer())),
 590                          _))
 591       .Times(1)
 592       .WillOnce(Return(&okay_stream));
 593   EXPECT_CALL(okay_stream, Open())
 594       .WillOnce(Return(true));
 595
 596   AudioOutputProxy* proxy = new AudioOutputProxy(resampler_.get());
 597   EXPECT_TRUE(proxy->Open());
 598   CloseAndWaitForCloseTimer(proxy, &okay_stream);
 599 }
 600
 601 // Simulate failures to open both the low latency, the fallback high latency
 602 // stream, and the fake audio output stream and ensure AudioOutputResampler
 603 // terminates normally.
 604 TEST_F(AudioOutputResamplerTest, AllFallbackFailed) {
 605 // Only Windows has a high latency output driver that is not the same as the low
 606 // latency path.
 607 #if defined(OS_WIN)
 608   static const int kFallbackCount = 3;
 609 #else
 610   static const int kFallbackCount = 2;
 611 #endif
 612   EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 613       .Times(kFallbackCount)
 614       .WillRepeatedly(Return(static_cast<AudioOutputStream*>(NULL)));
 615
 616   AudioOutputProxy* proxy = new AudioOutputProxy(resampler_.get());
 617   EXPECT_FALSE(proxy->Open());
 618   proxy->Close();
 619 }
 620
 621 // Simulate an eventual OpenStream() failure; i.e. successful OpenStream() calls
 622 // eventually followed by one which fails; root cause of http://crbug.com/150619
 623 TEST_F(AudioOutputResamplerTest, LowLatencyOpenEventuallyFails) {
 624   MockAudioOutputStream stream1(&manager_, params_);
 625   MockAudioOutputStream stream2(&manager_, params_);
 626
 627   // Setup the mock such that all three streams are successfully created.
 628   EXPECT_CALL(manager(), MakeAudioOutputStream(_, _))
 629       .WillOnce(Return(&stream1))
 630       .WillOnce(Return(&stream2))
 631       .WillRepeatedly(Return(static_cast<AudioOutputStream*>(NULL)));
 632
 633   // Stream1 should be able to successfully open and start.
 634   EXPECT_CALL(stream1, Open())
 635       .WillOnce(Return(true));
 636   EXPECT_CALL(stream1, SetVolume(_))
 637       .Times(1);
 638
 639   // Stream2 should also be able to successfully open and start.
 640   EXPECT_CALL(stream2, Open())
 641       .WillOnce(Return(true));
 642   EXPECT_CALL(stream2, SetVolume(_))
 643       .Times(1);
 644
 645   // Open and start the first proxy and stream.
 646   AudioOutputProxy* proxy1 = new AudioOutputProxy(resampler_.get());
 647   EXPECT_TRUE(proxy1->Open());
 648   proxy1->Start(&callback_);
 649   OnStart();
 650
 651   // Open and start the second proxy and stream.
 652   AudioOutputProxy* proxy2 = new AudioOutputProxy(resampler_.get());
 653   EXPECT_TRUE(proxy2->Open());
 654   proxy2->Start(&callback_);
 655   OnStart();
 656
 657   // Attempt to open the third stream which should fail.
 658   AudioOutputProxy* proxy3 = new AudioOutputProxy(resampler_.get());
 659   EXPECT_FALSE(proxy3->Open());
 660   proxy3->Close();
 661
 662   // Perform the required Stop()/Close() shutdown dance for each proxy.  Under
 663   // the hood each proxy should correctly call CloseStream() if OpenStream()
 664   // succeeded or not.
 665   proxy2->Stop();
 666   CloseAndWaitForCloseTimer(proxy2, &stream2);
 667
 668   proxy1->Stop();
 669   CloseAndWaitForCloseTimer(proxy1, &stream1);
 670
 671   EXPECT_TRUE(stream1.stop_called());
 672   EXPECT_TRUE(stream1.start_called());
 673   EXPECT_TRUE(stream2.stop_called());
 674   EXPECT_TRUE(stream2.start_called());
 675 }
 676
 677 }  // namespace media