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/bind.h"
6#include "base/bind_helpers.h"
7#include "media/base/audio_renderer_mixer.h"
8#include "media/base/audio_renderer_mixer_input.h"
9#include "media/base/fake_audio_render_callback.h"
10#include "media/base/mock_audio_renderer_sink.h"
11#include "testing/gmock/include/gmock/gmock.h"
12#include "testing/gtest/include/gtest/gtest.h"
13
14namespace media {
15
16static const int kBitsPerChannel = 16;
17static const int kSampleRate = 48000;
18static const int kBufferSize = 8192;
19static const ChannelLayout kChannelLayout = CHANNEL_LAYOUT_STEREO;
20
21class AudioRendererMixerInputTest : public testing::Test {
22 public:
23  AudioRendererMixerInputTest() {
24    audio_parameters_ = AudioParameters(
25        AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout, kSampleRate,
26        kBitsPerChannel, kBufferSize);
27
28    CreateMixerInput();
29    fake_callback_.reset(new FakeAudioRenderCallback(0));
30    mixer_input_->Initialize(audio_parameters_, fake_callback_.get());
31    audio_bus_ = AudioBus::Create(audio_parameters_);
32  }
33
34  void CreateMixerInput() {
35    mixer_input_ = new AudioRendererMixerInput(
36        base::Bind(
37            &AudioRendererMixerInputTest::GetMixer, base::Unretained(this)),
38        base::Bind(
39            &AudioRendererMixerInputTest::RemoveMixer, base::Unretained(this)));
40  }
41
42  AudioRendererMixer* GetMixer(const AudioParameters& params) {
43    if (!mixer_) {
44      scoped_refptr<MockAudioRendererSink> sink = new MockAudioRendererSink();
45      EXPECT_CALL(*sink.get(), Start());
46      EXPECT_CALL(*sink.get(), Stop());
47
48      mixer_.reset(new AudioRendererMixer(
49          audio_parameters_, audio_parameters_, sink));
50    }
51    EXPECT_CALL(*this, RemoveMixer(testing::_));
52    return mixer_.get();
53  }
54
55  double ProvideInput() {
56    return mixer_input_->ProvideInput(audio_bus_.get(), base::TimeDelta());
57  }
58
59  MOCK_METHOD1(RemoveMixer, void(const AudioParameters&));
60
61 protected:
62  virtual ~AudioRendererMixerInputTest() {}
63
64  AudioParameters audio_parameters_;
65  scoped_ptr<AudioRendererMixer> mixer_;
66  scoped_refptr<AudioRendererMixerInput> mixer_input_;
67  scoped_ptr<FakeAudioRenderCallback> fake_callback_;
68  scoped_ptr<AudioBus> audio_bus_;
69
70  DISALLOW_COPY_AND_ASSIGN(AudioRendererMixerInputTest);
71};
72
73// Test that getting and setting the volume work as expected.  The volume is
74// returned from ProvideInput() only when playing.
75TEST_F(AudioRendererMixerInputTest, GetSetVolume) {
76  mixer_input_->Start();
77  mixer_input_->Play();
78
79  // Starting volume should be 1.0.
80  EXPECT_DOUBLE_EQ(ProvideInput(), 1);
81
82  const double kVolume = 0.5;
83  EXPECT_TRUE(mixer_input_->SetVolume(kVolume));
84  EXPECT_DOUBLE_EQ(ProvideInput(), kVolume);
85
86  mixer_input_->Stop();
87}
88
89// Test Start()/Play()/Pause()/Stop()/playing() all work as expected.  Also
90// implicitly tests that AddMixerInput() and RemoveMixerInput() work without
91// crashing; functional tests for these methods are in AudioRendererMixerTest.
92TEST_F(AudioRendererMixerInputTest, StartPlayPauseStopPlaying) {
93  mixer_input_->Start();
94  mixer_input_->Play();
95  EXPECT_DOUBLE_EQ(ProvideInput(), 1);
96  mixer_input_->Pause();
97  mixer_input_->Play();
98  EXPECT_DOUBLE_EQ(ProvideInput(), 1);
99  mixer_input_->Stop();
100}
101
102// Test that Stop() can be called before Initialize() and Start().
103TEST_F(AudioRendererMixerInputTest, StopBeforeInitializeOrStart) {
104  // |mixer_input_| was initialized during construction.
105  mixer_input_->Stop();
106
107  // Verify Stop() works without Initialize() or Start().
108  CreateMixerInput();
109  mixer_input_->Stop();
110}
111
112// Test that Start() can be called after Stop().
113// TODO(dalecurtis): We shouldn't allow this.  See http://crbug.com/151051
114TEST_F(AudioRendererMixerInputTest, StartAfterStop) {
115  mixer_input_->Stop();
116  mixer_input_->Start();
117  mixer_input_->Stop();
118}
119
120}  // namespace media
121