src/media/cast/audio_sender/audio_encoder_unittest.cc

   1 // Copyright 2013 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/audio_sender/audio_encoder.h"
  16 #include "media/cast/cast_config.h"
  17 #include "media/cast/cast_environment.h"
  18 #include "media/cast/test/fake_single_thread_task_runner.h"
  19 #include "media/cast/test/utility/audio_utility.h"
  20 #include "testing/gtest/include/gtest/gtest.h"
  21
  22 namespace media {
  23 namespace cast {
  24
  25 static const int64 kStartMillisecond = INT64_C(12345678900000);
  26
  27 namespace {
  28
  29 class TestEncodedAudioFrameReceiver {
  30  public:
  31   explicit TestEncodedAudioFrameReceiver(transport::AudioCodec codec)
  32       : codec_(codec), frames_received_(0), rtp_lower_bound_(0) {}
  33   virtual ~TestEncodedAudioFrameReceiver() {}
  34
  35   int frames_received() const { return frames_received_; }
  36
  37   void SetCaptureTimeBounds(const base::TimeTicks& lower_bound,
  38                             const base::TimeTicks& upper_bound) {
  39     lower_bound_ = lower_bound;
  40     upper_bound_ = upper_bound;
  41   }
  42
  43   void FrameEncoded(scoped_ptr<transport::EncodedAudioFrame> encoded_frame,
  44                     const base::TimeTicks& recorded_time) {
  45     EXPECT_EQ(codec_, encoded_frame->codec);
  46     EXPECT_EQ(static_cast<uint8>(frames_received_ & 0xff),
  47               encoded_frame->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_, recorded_time);
  58     lower_bound_ = recorded_time;
  59     EXPECT_GT(upper_bound_, recorded_time);
  60
  61     ++frames_received_;
  62   }
  63
  64  private:
  65   const transport::AudioCodec 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(
 100         base::TimeDelta::FromMilliseconds(kStartMillisecond));
 101   }
 102
 103   virtual void SetUp() {
 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(transport::AudioCodec codec) {
 115     const TestScenario& scenario = GetParam();
 116     SCOPED_TRACE(::testing::Message() << "Durations: " << scenario.ToString());
 117
 118     CreateObjectsForCodec(codec);
 119
 120     // Note: In audio_encoder.cc, 10 ms is the fixed frame duration.
 121     const base::TimeDelta frame_duration =
 122         base::TimeDelta::FromMilliseconds(10);
 123
 124     for (size_t i = 0; i < scenario.num_durations; ++i) {
 125       const bool simulate_missing_data = scenario.durations_in_ms[i] < 0;
 126       const base::TimeDelta duration =
 127           base::TimeDelta::FromMilliseconds(abs(scenario.durations_in_ms[i]));
 128       receiver_->SetCaptureTimeBounds(
 129           testing_clock_->NowTicks() - frame_duration,
 130           testing_clock_->NowTicks() + duration);
 131       if (simulate_missing_data) {
 132         task_runner_->RunTasks();
 133         testing_clock_->Advance(duration);
 134       } else {
 135         audio_encoder_->InsertAudio(audio_bus_factory_->NextAudioBus(duration),
 136                                     testing_clock_->NowTicks());
 137         task_runner_->RunTasks();
 138         testing_clock_->Advance(duration);
 139       }
 140     }
 141
 142     DVLOG(1) << "Received " << receiver_->frames_received()
 143              << " frames for this test run: " << scenario.ToString();
 144   }
 145
 146  private:
 147   void CreateObjectsForCodec(transport::AudioCodec codec) {
 148     AudioSenderConfig audio_config;
 149     audio_config.codec = codec;
 150     audio_config.use_external_encoder = false;
 151     audio_config.frequency = kDefaultAudioSamplingRate;
 152     audio_config.channels = 2;
 153     audio_config.bitrate = kDefaultAudioEncoderBitrate;
 154     audio_config.rtp_config.payload_type = 127;
 155
 156     audio_bus_factory_.reset(
 157         new TestAudioBusFactory(audio_config.channels,
 158                                 audio_config.frequency,
 159                                 TestAudioBusFactory::kMiddleANoteFreq,
 160                                 0.5f));
 161
 162     receiver_.reset(new TestEncodedAudioFrameReceiver(codec));
 163
 164     audio_encoder_.reset(new AudioEncoder(
 165         cast_environment_,
 166         audio_config,
 167         base::Bind(&TestEncodedAudioFrameReceiver::FrameEncoded,
 168                    base::Unretained(receiver_.get()))));
 169   }
 170
 171   base::SimpleTestTickClock* testing_clock_;  // Owned by CastEnvironment.
 172   scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
 173   scoped_ptr<TestAudioBusFactory> audio_bus_factory_;
 174   scoped_ptr<TestEncodedAudioFrameReceiver> receiver_;
 175   scoped_ptr<AudioEncoder> audio_encoder_;
 176   scoped_refptr<CastEnvironment> cast_environment_;
 177
 178   DISALLOW_COPY_AND_ASSIGN(AudioEncoderTest);
 179 };
 180
 181 TEST_P(AudioEncoderTest, EncodeOpus) { RunTestForCodec(transport::kOpus); }
 182
 183 TEST_P(AudioEncoderTest, EncodePcm16) { RunTestForCodec(transport::kPcm16); }
 184
 185 static const int64 kOneCall_3Millis[] = {3};
 186 static const int64 kOneCall_10Millis[] = {10};
 187 static const int64 kOneCall_13Millis[] = {13};
 188 static const int64 kOneCall_20Millis[] = {20};
 189
 190 static const int64 kTwoCalls_3Millis[] = {3, 3};
 191 static const int64 kTwoCalls_10Millis[] = {10, 10};
 192 static const int64 kTwoCalls_Mixed1[] = {3, 10};
 193 static const int64 kTwoCalls_Mixed2[] = {10, 3};
 194 static const int64 kTwoCalls_Mixed3[] = {3, 17};
 195 static const int64 kTwoCalls_Mixed4[] = {17, 3};
 196
 197 static const int64 kManyCalls_3Millis[] = {3, 3, 3, 3, 3, 3, 3, 3,
 198                                            3, 3, 3, 3, 3, 3, 3};
 199 static const int64 kManyCalls_10Millis[] = {10, 10, 10, 10, 10, 10, 10, 10,
 200                                             10, 10, 10, 10, 10, 10, 10};
 201 static const int64 kManyCalls_Mixed1[] = {3,  10, 3,  10, 3,  10, 3,  10, 3,
 202                                           10, 3,  10, 3,  10, 3,  10, 3,  10};
 203 static const int64 kManyCalls_Mixed2[] = {10, 3, 10, 3, 10, 3, 10, 3, 10, 3,
 204                                           10, 3, 10, 3, 10, 3, 10, 3, 10, 3};
 205 static const int64 kManyCalls_Mixed3[] = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 8,
 206                                           9, 7, 9, 3, 2, 3, 8, 4, 6, 2, 6, 4};
 207 static const int64 kManyCalls_Mixed4[] = {31, 4, 15, 9,  26, 53, 5,  8, 9,
 208                                           7,  9, 32, 38, 4,  62, 64, 3};
 209 static const int64 kManyCalls_Mixed5[] = {3, 14, 15, 9, 26, 53, 58, 9, 7,
 210                                           9, 3,  23, 8, 4,  6,  2,  6, 43};
 211
 212 static const int64 kOneBigUnderrun[] = {10, 10, 10, 10, -1000, 10, 10, 10};
 213 static const int64 kTwoBigUnderruns[] = {10, 10, 10, 10, -712, 10, 10, 10,
 214                                          -1311, 10, 10, 10};
 215 static const int64 kMixedUnderruns[] = {31, -64, 4, 15, 9, 26, -53, 5,  8, -9,
 216                                         7,  9, 32, 38, -4, 62, -64, 3};
 217
 218 INSTANTIATE_TEST_CASE_P(
 219     AudioEncoderTestScenarios,
 220     AudioEncoderTest,
 221     ::testing::Values(
 222         TestScenario(kOneCall_3Millis, arraysize(kOneCall_3Millis)),
 223         TestScenario(kOneCall_10Millis, arraysize(kOneCall_10Millis)),
 224         TestScenario(kOneCall_13Millis, arraysize(kOneCall_13Millis)),
 225         TestScenario(kOneCall_20Millis, arraysize(kOneCall_20Millis)),
 226         TestScenario(kTwoCalls_3Millis, arraysize(kTwoCalls_3Millis)),
 227         TestScenario(kTwoCalls_10Millis, arraysize(kTwoCalls_10Millis)),
 228         TestScenario(kTwoCalls_Mixed1, arraysize(kTwoCalls_Mixed1)),
 229         TestScenario(kTwoCalls_Mixed2, arraysize(kTwoCalls_Mixed2)),
 230         TestScenario(kTwoCalls_Mixed3, arraysize(kTwoCalls_Mixed3)),
 231         TestScenario(kTwoCalls_Mixed4, arraysize(kTwoCalls_Mixed4)),
 232         TestScenario(kManyCalls_3Millis, arraysize(kManyCalls_3Millis)),
 233         TestScenario(kManyCalls_10Millis, arraysize(kManyCalls_10Millis)),
 234         TestScenario(kManyCalls_Mixed1, arraysize(kManyCalls_Mixed1)),
 235         TestScenario(kManyCalls_Mixed2, arraysize(kManyCalls_Mixed2)),
 236         TestScenario(kManyCalls_Mixed3, arraysize(kManyCalls_Mixed3)),
 237         TestScenario(kManyCalls_Mixed4, arraysize(kManyCalls_Mixed4)),
 238         TestScenario(kManyCalls_Mixed5, arraysize(kManyCalls_Mixed5)),
 239         TestScenario(kOneBigUnderrun, arraysize(kOneBigUnderrun)),
 240         TestScenario(kTwoBigUnderruns, arraysize(kTwoBigUnderruns)),
 241         TestScenario(kMixedUnderruns, arraysize(kMixedUnderruns))));
 242
 243 }  // namespace cast
 244 }  // namespace media