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