src/content/renderer/media/webaudiosourceprovider_impl_unittest.cc

   1 // Copyright 2013 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 "content/renderer/media/webaudiosourceprovider_impl.h"
   6 #include "media/audio/audio_parameters.h"
   7 #include "media/base/fake_audio_render_callback.h"
   8 #include "media/base/mock_audio_renderer_sink.h"
   9 #include "testing/gmock/include/gmock/gmock.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11 #include "third_party/WebKit/public/web/WebAudioSourceProviderClient.h"
  12
  13 namespace content {
  14
  15 namespace {
  16 const float kTestVolume = 0.25;
  17 }  // namespace
  18
  19 class WebAudioSourceProviderImplTest
  20     : public testing::Test,
  21       public WebKit::WebAudioSourceProviderClient {
  22  public:
  23   WebAudioSourceProviderImplTest()
  24       : params_(media::AudioParameters::AUDIO_PCM_LINEAR,
  25                 media::CHANNEL_LAYOUT_STEREO, 48000, 16, 64),
  26         fake_callback_(0.1),
  27         mock_sink_(new media::MockAudioRendererSink()),
  28         wasp_impl_(new WebAudioSourceProviderImpl(mock_sink_)) {
  29   }
  30
  31   virtual ~WebAudioSourceProviderImplTest() {}
  32
  33   void CallAllSinkMethodsAndVerify(bool verify) {
  34     testing::InSequence s;
  35
  36     EXPECT_CALL(*mock_sink_.get(), Start()).Times(verify);
  37     wasp_impl_->Start();
  38
  39     EXPECT_CALL(*mock_sink_.get(), Play()).Times(verify);
  40     wasp_impl_->Play();
  41
  42     EXPECT_CALL(*mock_sink_.get(), Pause()).Times(verify);
  43     wasp_impl_->Pause();
  44
  45     EXPECT_CALL(*mock_sink_.get(), SetVolume(kTestVolume)).Times(verify);
  46     wasp_impl_->SetVolume(kTestVolume);
  47
  48     EXPECT_CALL(*mock_sink_.get(), Stop()).Times(verify);
  49     wasp_impl_->Stop();
  50
  51     testing::Mock::VerifyAndClear(mock_sink_.get());
  52   }
  53
  54   void SetClient(WebKit::WebAudioSourceProviderClient* client) {
  55     testing::InSequence s;
  56
  57     if (client) {
  58       EXPECT_CALL(*mock_sink_.get(), Stop());
  59       EXPECT_CALL(*this, setFormat(params_.channels(), params_.sample_rate()));
  60     }
  61     wasp_impl_->setClient(client);
  62
  63     testing::Mock::VerifyAndClear(mock_sink_.get());
  64     testing::Mock::VerifyAndClear(this);
  65   }
  66
  67   bool CompareBusses(const media::AudioBus* bus1, const media::AudioBus* bus2) {
  68     EXPECT_EQ(bus1->channels(), bus2->channels());
  69     EXPECT_EQ(bus1->frames(), bus2->frames());
  70     for (int ch = 0; ch < bus1->channels(); ++ch) {
  71       if (memcmp(bus1->channel(ch), bus2->channel(ch),
  72                  sizeof(*bus1->channel(ch)) * bus1->frames()) != 0) {
  73         return false;
  74       }
  75     }
  76     return true;
  77   }
  78
  79   // WebKit::WebAudioSourceProviderClient implementation.
  80   MOCK_METHOD2(setFormat, void(size_t numberOfChannels, float sampleRate));
  81
  82  protected:
  83   media::AudioParameters params_;
  84   media::FakeAudioRenderCallback fake_callback_;
  85   scoped_refptr<media::MockAudioRendererSink> mock_sink_;
  86   scoped_refptr<WebAudioSourceProviderImpl> wasp_impl_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(WebAudioSourceProviderImplTest);
  89 };
  90
  91 TEST_F(WebAudioSourceProviderImplTest, SetClientBeforeInitialize) {
  92   // setClient() with a NULL client should do nothing if no client is set.
  93   wasp_impl_->setClient(NULL);
  94
  95   EXPECT_CALL(*mock_sink_.get(), Stop());
  96   wasp_impl_->setClient(this);
  97
  98   // When Initialize() is called after setClient(), the params should propagate
  99   // to the client via setFormat() during the call.
 100   EXPECT_CALL(*this, setFormat(params_.channels(), params_.sample_rate()));
 101   wasp_impl_->Initialize(params_, &fake_callback_);
 102
 103   // setClient() with the same client should do nothing.
 104   wasp_impl_->setClient(this);
 105 }
 106
 107 // Verify AudioRendererSink functionality w/ and w/o a client.
 108 TEST_F(WebAudioSourceProviderImplTest, SinkMethods) {
 109   wasp_impl_->Initialize(params_, &fake_callback_);
 110   ASSERT_EQ(mock_sink_->callback(), &fake_callback_);
 111
 112   // Without a client all WASP calls should fall through to the underlying sink.
 113   CallAllSinkMethodsAndVerify(true);
 114
 115   // With a client no calls should reach the Stop()'d sink.  Also, setClient()
 116   // should propagate the params provided during Initialize() at call time.
 117   SetClient(this);
 118   CallAllSinkMethodsAndVerify(false);
 119
 120   // Removing the client should cause WASP to revert to the underlying sink.
 121   EXPECT_CALL(*mock_sink_.get(), SetVolume(kTestVolume));
 122   SetClient(NULL);
 123   CallAllSinkMethodsAndVerify(true);
 124 }
 125
 126 // Verify underlying sink state is restored after client removal.
 127 TEST_F(WebAudioSourceProviderImplTest, SinkStateRestored) {
 128   wasp_impl_->Initialize(params_, &fake_callback_);
 129
 130   // Verify state set before the client is set propagates back afterward.
 131   EXPECT_CALL(*mock_sink_.get(), Start());
 132   wasp_impl_->Start();
 133   SetClient(this);
 134
 135   EXPECT_CALL(*mock_sink_.get(), SetVolume(1.0));
 136   EXPECT_CALL(*mock_sink_.get(), Start());
 137   SetClient(NULL);
 138
 139   // Verify state set while the client was attached propagates back afterward.
 140   SetClient(this);
 141   wasp_impl_->Play();
 142   wasp_impl_->SetVolume(kTestVolume);
 143
 144   EXPECT_CALL(*mock_sink_.get(), SetVolume(kTestVolume));
 145   EXPECT_CALL(*mock_sink_.get(), Start());
 146   EXPECT_CALL(*mock_sink_.get(), Play());
 147   SetClient(NULL);
 148 }
 149
 150 // Test the AudioRendererSink state machine and its effects on provideInput().
 151 TEST_F(WebAudioSourceProviderImplTest, ProvideInput) {
 152   scoped_ptr<media::AudioBus> bus1 = media::AudioBus::Create(params_);
 153   scoped_ptr<media::AudioBus> bus2 = media::AudioBus::Create(params_);
 154
 155   // Point the WebVector into memory owned by |bus1|.
 156   WebKit::WebVector<float*> audio_data(static_cast<size_t>(bus1->channels()));
 157   for (size_t i = 0; i < audio_data.size(); ++i)
 158     audio_data[i] = bus1->channel(i);
 159
 160   // Verify provideInput() works before Initialize() and returns silence.
 161   bus1->channel(0)[0] = 1;
 162   bus2->Zero();
 163   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 164   ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
 165
 166   wasp_impl_->Initialize(params_, &fake_callback_);
 167   SetClient(this);
 168
 169   // Verify provideInput() is muted prior to Start() and no calls to the render
 170   // callback have occurred.
 171   bus1->channel(0)[0] = 1;
 172   bus2->Zero();
 173   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 174   ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
 175   ASSERT_EQ(fake_callback_.last_audio_delay_milliseconds(), -1);
 176
 177   wasp_impl_->Start();
 178
 179   // Ditto for Play().
 180   bus1->channel(0)[0] = 1;
 181   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 182   ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
 183   ASSERT_EQ(fake_callback_.last_audio_delay_milliseconds(), -1);
 184
 185   wasp_impl_->Play();
 186
 187   // Now we should get real audio data.
 188   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 189   ASSERT_FALSE(CompareBusses(bus1.get(), bus2.get()));
 190
 191   // Ensure volume adjustment is working.
 192   fake_callback_.reset();
 193   fake_callback_.Render(bus2.get(), 0);
 194   bus2->Scale(kTestVolume);
 195
 196   fake_callback_.reset();
 197   wasp_impl_->SetVolume(kTestVolume);
 198   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 199   ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
 200
 201   // Pause should return to silence.
 202   wasp_impl_->Pause();
 203   bus1->channel(0)[0] = 1;
 204   bus2->Zero();
 205   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 206   ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
 207
 208   wasp_impl_->Play();
 209
 210   // Play should return real audio data again...
 211   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 212   ASSERT_FALSE(CompareBusses(bus1.get(), bus2.get()));
 213
 214   // Stop() should return silence.
 215   wasp_impl_->Stop();
 216   bus1->channel(0)[0] = 1;
 217   wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
 218   ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
 219 }
 220
 221 }  // namespace content