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 "base/logging.h" 6 #include "base/memory/ref_counted.h" 7 #include "base/memory/scoped_ptr.h" 8 #include "content/renderer/media/audio_renderer_mixer_manager.h" 9 #include "media/audio/audio_parameters.h" 10 #include "media/base/audio_hardware_config.h" 11 #include "media/base/audio_renderer_mixer.h" 12 #include "media/base/audio_renderer_mixer_input.h" 13 #include "media/base/fake_audio_render_callback.h" 14 #include "media/base/mock_audio_renderer_sink.h" 15 #include "testing/gmock/include/gmock/gmock.h" 16 #include "testing/gtest/include/gtest/gtest.h" 17 18 namespace content { 19 20 static const int kBitsPerChannel = 16; 21 static const int kSampleRate = 48000; 22 static const int kBufferSize = 8192; 23 static const media::ChannelLayout kChannelLayout = media::CHANNEL_LAYOUT_STEREO; 24 25 static const int kRenderViewId = 123; 26 static const int kAnotherRenderViewId = 456; 27 28 using media::AudioParameters; 29 30 class AudioRendererMixerManagerTest : public testing::Test { 31 public: 32 AudioRendererMixerManagerTest() 33 : fake_config_(AudioParameters(), AudioParameters()) { 34 AudioParameters output_params( 35 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, 36 media::CHANNEL_LAYOUT_STEREO, 37 kSampleRate, 38 16, 39 kBufferSize); 40 fake_config_.UpdateOutputConfig(output_params); 41 42 manager_.reset(new AudioRendererMixerManager(&fake_config_)); 43 44 // We don't want to deal with instantiating a real AudioOutputDevice since 45 // it's not important to our testing, so we inject a mock. 46 mock_sink_ = new media::MockAudioRendererSink(); 47 manager_->SetAudioRendererSinkForTesting(mock_sink_.get()); 48 } 49 50 media::AudioRendererMixer* GetMixer(int source_render_view_id, 51 const media::AudioParameters& params) { 52 return manager_->GetMixer(source_render_view_id, params); 53 } 54 55 void RemoveMixer(int source_render_view_id, 56 const media::AudioParameters& params) { 57 return manager_->RemoveMixer(source_render_view_id, params); 58 } 59 60 // Number of instantiated mixers. 61 int mixer_count() { 62 return manager_->mixers_.size(); 63 } 64 65 protected: 66 media::AudioHardwareConfig fake_config_; 67 scoped_ptr<AudioRendererMixerManager> manager_; 68 scoped_refptr<media::MockAudioRendererSink> mock_sink_; 69 70 DISALLOW_COPY_AND_ASSIGN(AudioRendererMixerManagerTest); 71 }; 72 73 // Verify GetMixer() and RemoveMixer() both work as expected; particularly with 74 // respect to the explicit ref counting done. 75 TEST_F(AudioRendererMixerManagerTest, GetRemoveMixer) { 76 // Since we're testing two different sets of parameters, we expect 77 // AudioRendererMixerManager to call Start and Stop on our mock twice. 78 EXPECT_CALL(*mock_sink_.get(), Start()).Times(2); 79 EXPECT_CALL(*mock_sink_.get(), Stop()).Times(2); 80 81 // There should be no mixers outstanding to start with. 82 EXPECT_EQ(mixer_count(), 0); 83 84 media::AudioParameters params1( 85 media::AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout, kSampleRate, 86 kBitsPerChannel, kBufferSize); 87 88 media::AudioRendererMixer* mixer1 = GetMixer(kRenderViewId, params1); 89 ASSERT_TRUE(mixer1); 90 EXPECT_EQ(mixer_count(), 1); 91 92 // The same parameters should return the same mixer1. 93 EXPECT_EQ(mixer1, GetMixer(kRenderViewId, params1)); 94 EXPECT_EQ(mixer_count(), 1); 95 96 // Remove the extra mixer we just acquired. 97 RemoveMixer(kRenderViewId, params1); 98 EXPECT_EQ(mixer_count(), 1); 99 100 media::AudioParameters params2( 101 media::AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout, kSampleRate * 2, 102 kBitsPerChannel, kBufferSize * 2); 103 media::AudioRendererMixer* mixer2 = GetMixer(kRenderViewId, params2); 104 ASSERT_TRUE(mixer2); 105 EXPECT_EQ(mixer_count(), 2); 106 107 // Different parameters should result in a different mixer1. 108 EXPECT_NE(mixer1, mixer2); 109 110 // Remove both outstanding mixers. 111 RemoveMixer(kRenderViewId, params1); 112 EXPECT_EQ(mixer_count(), 1); 113 RemoveMixer(kRenderViewId, params2); 114 EXPECT_EQ(mixer_count(), 0); 115 } 116 117 // Verify CreateInput() provides AudioRendererMixerInput with the appropriate 118 // callbacks and they are working as expected. Also, verify that separate 119 // mixers are created for separate render views, even though the AudioParameters 120 // are the same. 121 TEST_F(AudioRendererMixerManagerTest, CreateInput) { 122 // Expect AudioRendererMixerManager to call Start and Stop on our mock twice 123 // each. Note: Under normal conditions, each mixer would get its own sink! 124 EXPECT_CALL(*mock_sink_.get(), Start()).Times(2); 125 EXPECT_CALL(*mock_sink_.get(), Stop()).Times(2); 126 127 media::AudioParameters params( 128 media::AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout, kSampleRate, 129 kBitsPerChannel, kBufferSize); 130 131 // Create two mixer inputs and ensure this doesn't instantiate any mixers yet. 132 EXPECT_EQ(mixer_count(), 0); 133 scoped_refptr<media::AudioRendererMixerInput> input( 134 manager_->CreateInput(kRenderViewId)); 135 EXPECT_EQ(mixer_count(), 0); 136 scoped_refptr<media::AudioRendererMixerInput> another_input( 137 manager_->CreateInput(kAnotherRenderViewId)); 138 EXPECT_EQ(mixer_count(), 0); 139 140 // Implicitly test that AudioRendererMixerInput was provided with the expected 141 // callbacks needed to acquire an AudioRendererMixer and remove it. 142 media::FakeAudioRenderCallback callback(0); 143 input->Initialize(params, &callback); 144 EXPECT_EQ(mixer_count(), 1); 145 media::FakeAudioRenderCallback another_callback(1); 146 another_input->Initialize(params, &another_callback); 147 EXPECT_EQ(mixer_count(), 2); 148 149 // Destroying the inputs should destroy the mixers. 150 input = NULL; 151 EXPECT_EQ(mixer_count(), 1); 152 another_input = NULL; 153 EXPECT_EQ(mixer_count(), 0); 154 } 155 156 } // namespace content 157
