Implemented AudioOutputProxy.

AudioOutputProxy implements AudioOutputStream interface, but opens
audio device only when audio is playing.

BUG=39825
TEST=Unittests.

Review URL: http://codereview.chromium.org/5158003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@67327 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 353 insertions, 0 deletions

diff --git a/media/audio/audio_output_proxy_unittest.cc b/media/audio/audio_output_proxy_unittest.cc
new file mode 100644
index 0000000..efc164c
--- /dev/null
+++ b/media/audio/audio_output_proxy_unittest.cc
@@ -0,0 +1,353 @@
+// Copyright (c) 2010 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/message_loop.h"
+#include "base/platform_thread.h"
+#include "media/audio/audio_output_dispatcher.h"
+#include "media/audio/audio_output_proxy.h"
+#include "media/audio/audio_manager.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::_;
+using ::testing::Mock;
+using ::testing::Return;
+
+namespace {
+const int kTestCloseDelayMs = 100;
+
+// Used in the test where we don't want a stream to be closed unexpectedly.
+const int kTestBigCloseDelayMs = 1000 * 1000;
+}  // namespace
+
+class MockAudioOutputStream : public AudioOutputStream {
+ public:
+  MockAudioOutputStream() {}
+
+  MOCK_METHOD0(Open, bool());
+  MOCK_METHOD1(Start, void(AudioSourceCallback* callback));
+  MOCK_METHOD0(Stop, void());
+  MOCK_METHOD1(SetVolume, void(double volume));
+  MOCK_METHOD1(GetVolume, void(double* volume));
+  MOCK_METHOD0(Close, void());
+};
+
+class MockAudioManager : public AudioManager {
+ public:
+  MockAudioManager() { };
+
+  MOCK_METHOD0(Init, void());
+  MOCK_METHOD0(HasAudioOutputDevices, bool());
+  MOCK_METHOD0(HasAudioInputDevices, bool());
+  MOCK_METHOD0(GetAudioInputDeviceModel, string16());
+  MOCK_METHOD1(MakeAudioOutputStream, AudioOutputStream*(
+      AudioParameters params));
+  MOCK_METHOD1(MakeAudioOutputStreamProxy, AudioOutputStream*(
+      const AudioParameters& params));
+  MOCK_METHOD1(MakeAudioInputStream, AudioInputStream*(
+      AudioParameters params));
+  MOCK_METHOD0(MuteAll, void());
+  MOCK_METHOD0(UnMuteAll, void());
+  MOCK_METHOD0(GetMessageLoop, MessageLoop*());
+};
+
+class MockAudioSourceCallback : public AudioOutputStream::AudioSourceCallback {
+ public:
+  MOCK_METHOD4(OnMoreData, uint32(AudioOutputStream* stream,
+                                  uint8* dest, uint32 max_size,
+                                  AudioBuffersState buffers_state));
+  MOCK_METHOD2(OnError, void(AudioOutputStream* stream, int code));
+};
+
+class AudioOutputProxyTest : public testing::Test {
+ protected:
+  virtual void SetUp() {
+    EXPECT_CALL(manager_, GetMessageLoop())
+        .WillRepeatedly(Return(&message_loop_));
+    InitDispatcher(kTestCloseDelayMs);
+  }
+
+  virtual void TearDown() {
+    // All paused proxies should have been closed at this point.
+    EXPECT_EQ(0u, dispatcher_->paused_proxies_);
+
+    // This is necessary to free all proxy objects that have been
+    // closed by the test.
+    message_loop_.RunAllPending();
+  }
+
+  void InitDispatcher(int close_delay_ms) {
+    AudioParameters params(AudioParameters::AUDIO_PCM_LINEAR, 2, 44100,
+                           16, 1024);
+    dispatcher_ = new AudioOutputDispatcher(&manager_, params, close_delay_ms);
+  }
+
+  MessageLoop message_loop_;
+  scoped_refptr<AudioOutputDispatcher> dispatcher_;
+  MockAudioManager manager_;
+  MockAudioSourceCallback callback_;
+};
+
+TEST_F(AudioOutputProxyTest, CreateAndClose) {
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  proxy->Close();
+}
+
+TEST_F(AudioOutputProxyTest, OpenAndClose) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy->Open());
+  proxy->Close();
+}
+
+// Create a stream, and verify that it is closed after kTestCloseDelayMs.
+// if it doesn't start playing.
+TEST_F(AudioOutputProxyTest, CreateAndWait) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy->Open());
+
+  // Simulate a delay.
+  PlatformThread::Sleep(kTestCloseDelayMs * 2);
+  message_loop_.RunAllPending();
+
+  // Verify expectation before calling Close().
+  Mock::VerifyAndClear(&stream);
+
+  proxy->Close();
+}
+
+// Create a stream, and then calls Start() and Stop().
+TEST_F(AudioOutputProxyTest, StartAndStop) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream, Start(_))
+      .Times(1);
+  EXPECT_CALL(stream, SetVolume(_))
+      .Times(1);
+  EXPECT_CALL(stream, Stop())
+      .Times(1);
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy->Open());
+
+  proxy->Start(&callback_);
+  proxy->Stop();
+
+  proxy->Close();
+}
+
+// Verify that the stream is closed after Stop is called.
+TEST_F(AudioOutputProxyTest, CloseAfterStop) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream, Start(_))
+      .Times(1);
+  EXPECT_CALL(stream, SetVolume(_))
+      .Times(1);
+  EXPECT_CALL(stream, Stop())
+      .Times(1);
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy->Open());
+
+  proxy->Start(&callback_);
+  proxy->Stop();
+
+  // Simulate a delay.
+  message_loop_.RunAllPending();
+  PlatformThread::Sleep(kTestCloseDelayMs * 10);
+  message_loop_.RunAllPending();
+
+  // Verify expectation before calling Close().
+  Mock::VerifyAndClear(&stream);
+
+  proxy->Close();
+}
+
+// Create two streams, but don't start them. Only one device must be open.
+TEST_F(AudioOutputProxyTest, TwoStreams) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy1 = new AudioOutputProxy(dispatcher_);
+  AudioOutputProxy* proxy2 = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy1->Open());
+  EXPECT_TRUE(proxy2->Open());
+  proxy1->Close();
+  proxy2->Close();
+}
+
+// Two streams: verify that second stream is allocated when the first
+// starts playing.
+TEST_F(AudioOutputProxyTest, TwoStreams_OnePlaying) {
+  MockAudioOutputStream stream1;
+  MockAudioOutputStream stream2;
+
+  InitDispatcher(kTestBigCloseDelayMs);
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream1))
+      .WillOnce(Return(&stream2));
+
+  EXPECT_CALL(stream1, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream1, Start(_))
+      .Times(1);
+  EXPECT_CALL(stream1, SetVolume(_))
+      .Times(1);
+  EXPECT_CALL(stream1, Stop())
+      .Times(1);
+  EXPECT_CALL(stream1, Close())
+      .Times(1);
+
+  EXPECT_CALL(stream2, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream2, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy1 = new AudioOutputProxy(dispatcher_);
+  AudioOutputProxy* proxy2 = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy1->Open());
+  EXPECT_TRUE(proxy2->Open());
+
+  proxy1->Start(&callback_);
+  message_loop_.RunAllPending();
+  proxy1->Stop();
+
+  proxy1->Close();
+  proxy2->Close();
+}
+
+// Two streams, both are playing. Dispatcher should not open a third stream.
+TEST_F(AudioOutputProxyTest, TwoStreams_BothPlaying) {
+  MockAudioOutputStream stream1;
+  MockAudioOutputStream stream2;
+
+  InitDispatcher(kTestBigCloseDelayMs);
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream1))
+      .WillOnce(Return(&stream2));
+
+  EXPECT_CALL(stream1, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream1, Start(_))
+      .Times(1);
+  EXPECT_CALL(stream1, SetVolume(_))
+      .Times(1);
+  EXPECT_CALL(stream1, Stop())
+      .Times(1);
+  EXPECT_CALL(stream1, Close())
+      .Times(1);
+
+  EXPECT_CALL(stream2, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream2, Start(_))
+      .Times(1);
+  EXPECT_CALL(stream2, SetVolume(_))
+      .Times(1);
+  EXPECT_CALL(stream2, Stop())
+      .Times(1);
+  EXPECT_CALL(stream2, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy1 = new AudioOutputProxy(dispatcher_);
+  AudioOutputProxy* proxy2 = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy1->Open());
+  EXPECT_TRUE(proxy2->Open());
+
+  proxy1->Start(&callback_);
+  proxy2->Start(&callback_);
+  proxy1->Stop();
+  proxy2->Stop();
+
+  proxy1->Close();
+  proxy2->Close();
+}
+
+// Open() method failed.
+TEST_F(AudioOutputProxyTest, OpenFailed) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(false));
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  EXPECT_FALSE(proxy->Open());
+  proxy->Close();
+}
+
+// Start() method failed.
+TEST_F(AudioOutputProxyTest, StartFailed) {
+  MockAudioOutputStream stream;
+
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(&stream));
+  EXPECT_CALL(stream, Open())
+      .WillOnce(Return(true));
+  EXPECT_CALL(stream, Close())
+      .Times(1);
+
+  AudioOutputProxy* proxy = new AudioOutputProxy(dispatcher_);
+  EXPECT_TRUE(proxy->Open());
+
+  // Simulate a delay.
+  PlatformThread::Sleep(kTestCloseDelayMs);
+  message_loop_.RunAllPending();
+
+  // Verify expectation before calling Close().
+  Mock::VerifyAndClear(&stream);
+
+  // |stream| is closed at this point. Start() should reopen it again.
+  EXPECT_CALL(manager_, MakeAudioOutputStream(_))
+      .WillOnce(Return(reinterpret_cast<AudioOutputStream*>(NULL)));
+
+  EXPECT_CALL(callback_, OnError(_, _))
+      .Times(1);
+
+  proxy->Start(&callback_);
+
+  Mock::VerifyAndClear(&callback_);
+
+  proxy->Close();
+}