media/cast/sender/audio_encoder_unittest.cc

   1 // Copyright 2014 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 <stdint.h>
   6
   7 #include <sstream>
   8 #include <string>
   9
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "media/base/audio_bus.h"
  14 #include "media/base/media.h"
  15 #include "media/cast/cast_environment.h"
  16 #include "media/cast/sender/audio_encoder.h"
  17 #include "media/cast/test/fake_single_thread_task_runner.h"
  18 #include "media/cast/test/utility/audio_utility.h"
  19 #include "testing/gtest/include/gtest/gtest.h"
  20
  21 namespace media {
  22 namespace cast {
  23
  24 static const int kNumChannels = 2;
  25
  26 namespace {
  27
  28 class TestEncodedAudioFrameReceiver {
  29  public:
  30   TestEncodedAudioFrameReceiver() : frames_received_(0), rtp_lower_bound_(0) {}
  31   virtual ~TestEncodedAudioFrameReceiver() {}
  32
  33   int frames_received() const { return frames_received_; }
  34
  35   void SetCaptureTimeBounds(const base::TimeTicks& lower_bound,
  36                             const base::TimeTicks& upper_bound) {
  37     lower_bound_ = lower_bound;
  38     upper_bound_ = upper_bound;
  39   }
  40
  41   void SetSamplesPerFrame(int samples_per_frame) {
  42     samples_per_frame_ = samples_per_frame;
  43   }
  44
  45   void FrameEncoded(scoped_ptr<EncodedFrame> encoded_frame,
  46                     int samples_skipped) {
  47     EXPECT_EQ(encoded_frame->dependency, EncodedFrame::KEY);
  48     EXPECT_EQ(static_cast<uint8>(frames_received_ & 0xff),
  49               encoded_frame->frame_id);
  50     EXPECT_EQ(encoded_frame->frame_id, encoded_frame->referenced_frame_id);
  51     // RTP timestamps should be monotonically increasing and integer multiples
  52     // of the fixed frame size.
  53     EXPECT_LE(rtp_lower_bound_, encoded_frame->rtp_timestamp);
  54     rtp_lower_bound_ = encoded_frame->rtp_timestamp;
  55     EXPECT_EQ(0u, encoded_frame->rtp_timestamp % samples_per_frame_);
  56     EXPECT_TRUE(!encoded_frame->data.empty());
  57
  58     EXPECT_LE(lower_bound_, encoded_frame->reference_time);
  59     lower_bound_ = encoded_frame->reference_time;
  60     EXPECT_GT(upper_bound_, encoded_frame->reference_time);
  61
  62     ++frames_received_;
  63   }
  64
  65  private:
  66   int frames_received_;
  67   uint32 rtp_lower_bound_;
  68   int samples_per_frame_;
  69   base::TimeTicks lower_bound_;
  70   base::TimeTicks upper_bound_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(TestEncodedAudioFrameReceiver);
  73 };
  74
  75 struct TestScenario {
  76   const int64* durations_in_ms;
  77   size_t num_durations;
  78
  79   TestScenario(const int64* d, size_t n)
  80       : durations_in_ms(d), num_durations(n) {}
  81
  82   std::string ToString() const {
  83     std::ostringstream out;
  84     for (size_t i = 0; i < num_durations; ++i) {
  85       if (i > 0)
  86         out << ", ";
  87       out << durations_in_ms[i];
  88     }
  89     return out.str();
  90   }
  91 };
  92
  93 }  // namespace
  94
  95 class AudioEncoderTest : public ::testing::TestWithParam<TestScenario> {
  96  public:
  97   AudioEncoderTest() {
  98     InitializeMediaLibraryForTesting();
  99     testing_clock_ = new base::SimpleTestTickClock();
 100     testing_clock_->Advance(base::TimeTicks::Now() - base::TimeTicks());
 101   }
 102
 103   void SetUp() override {
 104     task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_);
 105     cast_environment_ =
 106         new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_).Pass(),
 107                             task_runner_,
 108                             task_runner_,
 109                             task_runner_);
 110   }
 111
 112   virtual ~AudioEncoderTest() {}
 113
 114   void RunTestForCodec(Codec codec) {
 115     const TestScenario& scenario = GetParam();
 116     SCOPED_TRACE(::testing::Message() << "Durations: " << scenario.ToString());
 117
 118     CreateObjectsForCodec(codec);
 119
 120     const base::TimeDelta frame_duration = audio_encoder_->GetFrameDuration();
 121
 122     for (size_t i = 0; i < scenario.num_durations; ++i) {
 123       const bool simulate_missing_data = scenario.durations_in_ms[i] < 0;
 124       const base::TimeDelta duration = base::TimeDelta::FromMilliseconds(
 125           std::abs(scenario.durations_in_ms[i]));
 126       receiver_->SetCaptureTimeBounds(
 127           testing_clock_->NowTicks() - frame_duration,
 128           testing_clock_->NowTicks() + duration);
 129       if (simulate_missing_data) {
 130         task_runner_->RunTasks();
 131         testing_clock_->Advance(duration);
 132       } else {
 133         audio_encoder_->InsertAudio(audio_bus_factory_->NextAudioBus(duration),
 134                                     testing_clock_->NowTicks());
 135         task_runner_->RunTasks();
 136         testing_clock_->Advance(duration);
 137       }
 138     }
 139
 140     DVLOG(1) << "Received " << receiver_->frames_received()
 141              << " frames for this test run: " << scenario.ToString();
 142   }
 143
 144  private:
 145   void CreateObjectsForCodec(Codec codec) {
 146     audio_bus_factory_.reset(
 147         new TestAudioBusFactory(kNumChannels,
 148                                 kDefaultAudioSamplingRate,
 149                                 TestAudioBusFactory::kMiddleANoteFreq,
 150                                 0.5f));
 151
 152     receiver_.reset(new TestEncodedAudioFrameReceiver());
 153
 154     audio_encoder_.reset(new AudioEncoder(
 155         cast_environment_,
 156         kNumChannels,
 157         kDefaultAudioSamplingRate,
 158         kDefaultAudioEncoderBitrate,
 159         codec,
 160         base::Bind(&TestEncodedAudioFrameReceiver::FrameEncoded,
 161                    base::Unretained(receiver_.get()))));
 162
 163     receiver_->SetSamplesPerFrame(audio_encoder_->GetSamplesPerFrame());
 164   }
 165
 166   base::SimpleTestTickClock* testing_clock_;  // Owned by CastEnvironment.
 167   scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
 168   scoped_ptr<TestAudioBusFactory> audio_bus_factory_;
 169   scoped_ptr<TestEncodedAudioFrameReceiver> receiver_;
 170   scoped_ptr<AudioEncoder> audio_encoder_;
 171   scoped_refptr<CastEnvironment> cast_environment_;
 172
 173   DISALLOW_COPY_AND_ASSIGN(AudioEncoderTest);
 174 };
 175
 176 TEST_P(AudioEncoderTest, EncodeOpus) {
 177   RunTestForCodec(CODEC_AUDIO_OPUS);
 178 }
 179
 180 TEST_P(AudioEncoderTest, EncodePcm16) {
 181   RunTestForCodec(CODEC_AUDIO_PCM16);
 182 }
 183
 184 #if defined(OS_MACOSX)
 185 TEST_P(AudioEncoderTest, EncodeAac) {
 186   RunTestForCodec(CODEC_AUDIO_AAC);
 187 }
 188 #endif
 189
 190 static const int64 kOneCall_3Millis[] = {3};
 191 static const int64 kOneCall_10Millis[] = {10};
 192 static const int64 kOneCall_13Millis[] = {13};
 193 static const int64 kOneCall_20Millis[] = {20};
 194
 195 static const int64 kTwoCalls_3Millis[] = {3, 3};
 196 static const int64 kTwoCalls_10Millis[] = {10, 10};
 197 static const int64 kTwoCalls_Mixed1[] = {3, 10};
 198 static const int64 kTwoCalls_Mixed2[] = {10, 3};
 199 static const int64 kTwoCalls_Mixed3[] = {3, 17};
 200 static const int64 kTwoCalls_Mixed4[] = {17, 3};
 201
 202 static const int64 kManyCalls_3Millis[] = {3, 3, 3, 3, 3, 3, 3, 3,
 203                                            3, 3, 3, 3, 3, 3, 3};
 204 static const int64 kManyCalls_10Millis[] = {10, 10, 10, 10, 10, 10, 10, 10,
 205                                             10, 10, 10, 10, 10, 10, 10};
 206 static const int64 kManyCalls_Mixed1[] = {3,  10, 3,  10, 3,  10, 3,  10, 3,
 207                                           10, 3,  10, 3,  10, 3,  10, 3,  10};
 208 static const int64 kManyCalls_Mixed2[] = {10, 3, 10, 3, 10, 3, 10, 3, 10, 3,
 209                                           10, 3, 10, 3, 10, 3, 10, 3, 10, 3};
 210 static const int64 kManyCalls_Mixed3[] = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 8,
 211                                           9, 7, 9, 3, 2, 3, 8, 4, 6, 2, 6, 4};
 212 static const int64 kManyCalls_Mixed4[] = {31, 4, 15, 9,  26, 53, 5,  8, 9,
 213                                           7,  9, 32, 38, 4,  62, 64, 3};
 214 static const int64 kManyCalls_Mixed5[] = {3, 14, 15, 9, 26, 53, 58, 9, 7,
 215                                           9, 3,  23, 8, 4,  6,  2,  6, 43};
 216
 217 static const int64 kOneBigUnderrun[] = {10, 10, 10, 10, -1000, 10, 10, 10};
 218 static const int64 kTwoBigUnderruns[] = {10, 10, 10, 10, -712, 10, 10, 10,
 219                                          -1311, 10, 10, 10};
 220 static const int64 kMixedUnderruns[] = {31, -64, 4, 15, 9, 26, -53, 5,  8, -9,
 221                                         7,  9, 32, 38, -4, 62, -64, 3};
 222
 223 INSTANTIATE_TEST_CASE_P(
 224     AudioEncoderTestScenarios,
 225     AudioEncoderTest,
 226     ::testing::Values(
 227         TestScenario(kOneCall_3Millis, arraysize(kOneCall_3Millis)),
 228         TestScenario(kOneCall_10Millis, arraysize(kOneCall_10Millis)),
 229         TestScenario(kOneCall_13Millis, arraysize(kOneCall_13Millis)),
 230         TestScenario(kOneCall_20Millis, arraysize(kOneCall_20Millis)),
 231         TestScenario(kTwoCalls_3Millis, arraysize(kTwoCalls_3Millis)),
 232         TestScenario(kTwoCalls_10Millis, arraysize(kTwoCalls_10Millis)),
 233         TestScenario(kTwoCalls_Mixed1, arraysize(kTwoCalls_Mixed1)),
 234         TestScenario(kTwoCalls_Mixed2, arraysize(kTwoCalls_Mixed2)),
 235         TestScenario(kTwoCalls_Mixed3, arraysize(kTwoCalls_Mixed3)),
 236         TestScenario(kTwoCalls_Mixed4, arraysize(kTwoCalls_Mixed4)),
 237         TestScenario(kManyCalls_3Millis, arraysize(kManyCalls_3Millis)),
 238         TestScenario(kManyCalls_10Millis, arraysize(kManyCalls_10Millis)),
 239         TestScenario(kManyCalls_Mixed1, arraysize(kManyCalls_Mixed1)),
 240         TestScenario(kManyCalls_Mixed2, arraysize(kManyCalls_Mixed2)),
 241         TestScenario(kManyCalls_Mixed3, arraysize(kManyCalls_Mixed3)),
 242         TestScenario(kManyCalls_Mixed4, arraysize(kManyCalls_Mixed4)),
 243         TestScenario(kManyCalls_Mixed5, arraysize(kManyCalls_Mixed5)),
 244         TestScenario(kOneBigUnderrun, arraysize(kOneBigUnderrun)),
 245         TestScenario(kTwoBigUnderruns, arraysize(kTwoBigUnderruns)),
 246         TestScenario(kMixedUnderruns, arraysize(kMixedUnderruns))));
 247
 248 }  // namespace cast
 249 }  // namespace media