components/audio_modem/audio_player_unittest.cc

   1 // Copyright 2015 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 "components/audio_modem/audio_player.h"
   6
   7 #include "base/bind.h"
   8 #include "base/memory/weak_ptr.h"
   9 #include "components/audio_modem/audio_player_impl.h"
  10 #include "components/audio_modem/public/audio_modem_types.h"
  11 #include "components/audio_modem/test/random_samples.h"
  12 #include "media/audio/audio_manager.h"
  13 #include "media/audio/audio_manager_base.h"
  14 #include "media/base/audio_bus.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 namespace {
  18
  19 class TestAudioOutputStream : public media::AudioOutputStream {
  20  public:
  21   using GatherSamplesCallback =
  22       base::Callback<void(scoped_ptr<media::AudioBus>, int frames)>;
  23   TestAudioOutputStream(int default_frame_count,
  24                         int max_frame_count,
  25                         GatherSamplesCallback gather_callback)
  26       : default_frame_count_(default_frame_count),
  27         max_frame_count_(max_frame_count),
  28         gather_callback_(gather_callback),
  29         callback_(nullptr) {
  30     caller_loop_ = base::MessageLoop::current();
  31   }
  32
  33   ~TestAudioOutputStream() override {}
  34
  35   bool Open() override { return true; }
  36   void Start(AudioSourceCallback* callback) override {
  37     callback_ = callback;
  38     GatherPlayedSamples();
  39   }
  40   void Stop() override {}
  41   void SetVolume(double volume) override {}
  42   void GetVolume(double* volume) override {}
  43   void Close() override {}
  44
  45  private:
  46   void GatherPlayedSamples() {
  47     int frames = 0, total_frames = 0;
  48     do {
  49       // Call back into the player to get samples that it wants us to play.
  50       scoped_ptr<media::AudioBus> dest =
  51           media::AudioBus::Create(1, default_frame_count_);
  52       frames = callback_->OnMoreData(dest.get(), 0);
  53       total_frames += frames;
  54       // Send the samples given to us by the player to the gather callback.
  55       caller_loop_->PostTask(
  56           FROM_HERE, base::Bind(gather_callback_, base::Passed(&dest), frames));
  57     } while (frames && total_frames < max_frame_count_);
  58   }
  59
  60   int default_frame_count_;
  61   int max_frame_count_;
  62   GatherSamplesCallback gather_callback_;
  63   AudioSourceCallback* callback_;
  64   base::MessageLoop* caller_loop_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(TestAudioOutputStream);
  67 };
  68
  69 }  // namespace
  70
  71 namespace audio_modem {
  72
  73 class AudioPlayerTest : public testing::Test,
  74                         public base::SupportsWeakPtr<AudioPlayerTest> {
  75  public:
  76   AudioPlayerTest() : buffer_index_(0), player_(nullptr) {
  77     if (!media::AudioManager::Get())
  78       media::AudioManager::CreateForTesting();
  79   }
  80
  81   ~AudioPlayerTest() override { DeletePlayer(); }
  82
  83   void CreatePlayer() {
  84     DeletePlayer();
  85     player_ = new AudioPlayerImpl();
  86     player_->set_output_stream_for_testing(new TestAudioOutputStream(
  87         kDefaultFrameCount,
  88         kMaxFrameCount,
  89         base::Bind(&AudioPlayerTest::GatherSamples, AsWeakPtr())));
  90     player_->Initialize();
  91   }
  92
  93   void DeletePlayer() {
  94     if (!player_)
  95       return;
  96     player_->Finalize();
  97     player_ = nullptr;
  98   }
  99
 100   void PlayAndVerifySamples(
 101       const scoped_refptr<media::AudioBusRefCounted>& samples) {
 102     DCHECK_LT(samples->frames(), kMaxFrameCount);
 103
 104     buffer_ = media::AudioBus::Create(1, kMaxFrameCount);
 105     buffer_index_ = 0;
 106     player_->Play(samples);
 107     player_->FlushAudioLoopForTesting();
 108     player_->Stop();
 109
 110     int differences = 0;
 111     for (int i = 0; i < kMaxFrameCount; ++i) {
 112       differences += (buffer_->channel(0)[i] !=
 113                       samples->channel(0)[i % samples->frames()]);
 114     }
 115     ASSERT_EQ(0, differences);
 116
 117     buffer_.reset();
 118   }
 119
 120   void GatherSamples(scoped_ptr<media::AudioBus> bus, int frames) {
 121     if (!buffer_.get())
 122       return;
 123     bus->CopyPartialFramesTo(0, frames, buffer_index_, buffer_.get());
 124     buffer_index_ += frames;
 125   }
 126
 127  protected:
 128   bool IsPlaying() {
 129     player_->FlushAudioLoopForTesting();
 130     return player_->is_playing_;
 131   }
 132
 133   static const int kDefaultFrameCount = 1024;
 134   static const int kMaxFrameCount = 1024 * 100;
 135
 136   scoped_ptr<media::AudioBus> buffer_;
 137   int buffer_index_;
 138
 139   // Deleted by calling Finalize() on the object.
 140   AudioPlayerImpl* player_;
 141   base::MessageLoop message_loop_;
 142 };
 143
 144 TEST_F(AudioPlayerTest, BasicPlayAndStop) {
 145   CreatePlayer();
 146   scoped_refptr<media::AudioBusRefCounted> samples =
 147       media::AudioBusRefCounted::Create(1, 7331);
 148
 149   player_->Play(samples);
 150   EXPECT_TRUE(IsPlaying());
 151   player_->Stop();
 152   EXPECT_FALSE(IsPlaying());
 153   player_->Play(samples);
 154
 155   EXPECT_TRUE(IsPlaying());
 156   player_->Stop();
 157   EXPECT_FALSE(IsPlaying());
 158   player_->Play(samples);
 159
 160   EXPECT_TRUE(IsPlaying());
 161   player_->Stop();
 162   EXPECT_FALSE(IsPlaying());
 163
 164   DeletePlayer();
 165 }
 166
 167 TEST_F(AudioPlayerTest, OutOfOrderPlayAndStopMultiple) {
 168   CreatePlayer();
 169   scoped_refptr<media::AudioBusRefCounted> samples =
 170       media::AudioBusRefCounted::Create(1, 1337);
 171
 172   player_->Stop();
 173   player_->Stop();
 174   player_->Stop();
 175   EXPECT_FALSE(IsPlaying());
 176
 177   player_->Play(samples);
 178   player_->Play(samples);
 179   EXPECT_TRUE(IsPlaying());
 180
 181   player_->Stop();
 182   player_->Stop();
 183   EXPECT_FALSE(IsPlaying());
 184
 185   DeletePlayer();
 186 }
 187
 188 TEST_F(AudioPlayerTest, PlayingEndToEnd) {
 189   const int kNumSamples = kDefaultFrameCount * 7 + 321;
 190   CreatePlayer();
 191
 192   PlayAndVerifySamples(CreateRandomAudioRefCounted(0x1337, 1, kNumSamples));
 193
 194   DeletePlayer();
 195 }
 196
 197 TEST_F(AudioPlayerTest, PlayingEndToEndRepeated) {
 198   const int kNumSamples = kDefaultFrameCount * 7 + 537;
 199   CreatePlayer();
 200
 201   PlayAndVerifySamples(CreateRandomAudioRefCounted(0x1337, 1, kNumSamples));
 202
 203   PlayAndVerifySamples(
 204       CreateRandomAudioRefCounted(0x7331, 1, kNumSamples - 3123));
 205
 206   PlayAndVerifySamples(CreateRandomAudioRefCounted(0xf00d, 1, kNumSamples * 2));
 207
 208   DeletePlayer();
 209 }
 210
 211 }  // namespace audio_modem