| Index: webrtc/video/vie_encoder_unittest.cc | 
| diff --git a/webrtc/video/vie_encoder_unittest.cc b/webrtc/video/vie_encoder_unittest.cc | 
| index 7a54fbe925f2fe75fe277b1d0cf4d6781ca29532..4d72a826f2241b22ff4d919877c2ef28bcbc0797 100644 | 
| --- a/webrtc/video/vie_encoder_unittest.cc | 
| +++ b/webrtc/video/vie_encoder_unittest.cc | 
| @@ -218,6 +218,7 @@ class ViEEncoderTest : public ::testing::Test { | 
| : video_send_config_(VideoSendStream::Config(nullptr)), | 
| codec_width_(320), | 
| codec_height_(240), | 
| +        max_framerate_(30), | 
| fake_encoder_(), | 
| stats_proxy_(new MockableSendStatisticsProxy( | 
| Clock::GetRealTimeClock(), | 
| @@ -234,7 +235,17 @@ class ViEEncoderTest : public ::testing::Test { | 
|  | 
| VideoEncoderConfig video_encoder_config; | 
| test::FillEncoderConfiguration(1, &video_encoder_config); | 
| +    video_encoder_config.video_stream_factory = | 
| +        new rtc::RefCountedObject<VideoStreamFactory>(1); | 
| video_encoder_config_ = video_encoder_config.Copy(); | 
| + | 
| +    // Framerate limit is specified by the VideoStreamFactory. | 
| +    std::vector<VideoStream> streams = | 
| +        video_encoder_config.video_stream_factory->CreateEncoderStreams( | 
| +            codec_width_, codec_height_, video_encoder_config); | 
| +    max_framerate_ = streams[0].max_framerate; | 
| +    fake_clock_.SetTimeMicros(1234); | 
| + | 
| ConfigureEncoder(std::move(video_encoder_config), true /* nack_enabled */); | 
| } | 
|  | 
| @@ -257,7 +268,8 @@ class ViEEncoderTest : public ::testing::Test { | 
| void ResetEncoder(const std::string& payload_name, | 
| size_t num_streams, | 
| size_t num_temporal_layers, | 
| -                    bool nack_enabled) { | 
| +                    bool nack_enabled, | 
| +                    bool screenshare) { | 
| video_send_config_.encoder_settings.payload_name = payload_name; | 
|  | 
| VideoEncoderConfig video_encoder_config; | 
| @@ -265,6 +277,9 @@ class ViEEncoderTest : public ::testing::Test { | 
| video_encoder_config.max_bitrate_bps = kTargetBitrateBps; | 
| video_encoder_config.video_stream_factory = | 
| new rtc::RefCountedObject<VideoStreamFactory>(num_temporal_layers); | 
| +    video_encoder_config.content_type = | 
| +        screenshare ? VideoEncoderConfig::ContentType::kScreen | 
| +                    : VideoEncoderConfig::ContentType::kRealtimeVideo; | 
| ConfigureEncoder(std::move(video_encoder_config), nack_enabled); | 
| } | 
|  | 
| @@ -324,6 +339,33 @@ class ViEEncoderTest : public ::testing::Test { | 
| EXPECT_FALSE(wants.target_pixel_count); | 
| } | 
|  | 
| +  void WaitForEncodedFrame(int64_t expected_ntp_time) { | 
| +    sink_.WaitForEncodedFrame(expected_ntp_time); | 
| +    fake_clock_.AdvanceTimeMicros(rtc::kNumMicrosecsPerSec / max_framerate_); | 
| +  } | 
| + | 
| +  bool TimedWaitForEncodedFrame(int64_t expected_ntp_time, int64_t timeout_ms) { | 
| +    bool ok = sink_.TimedWaitForEncodedFrame(expected_ntp_time, timeout_ms); | 
| +    fake_clock_.AdvanceTimeMicros(rtc::kNumMicrosecsPerSec / max_framerate_); | 
| +    return ok; | 
| +  } | 
| + | 
| +  void WaitForEncodedFrame(uint32_t expected_width, uint32_t expected_height) { | 
| +    sink_.WaitForEncodedFrame(expected_width, expected_height); | 
| +    fake_clock_.AdvanceTimeMicros(rtc::kNumMicrosecsPerSec / max_framerate_); | 
| +  } | 
| + | 
| +  void ExpectDroppedFrame() { | 
| +    sink_.ExpectDroppedFrame(); | 
| +    fake_clock_.AdvanceTimeMicros(rtc::kNumMicrosecsPerSec / max_framerate_); | 
| +  } | 
| + | 
| +  bool WaitForFrame(int64_t timeout_ms) { | 
| +    bool ok = sink_.WaitForFrame(timeout_ms); | 
| +    fake_clock_.AdvanceTimeMicros(rtc::kNumMicrosecsPerSec / max_framerate_); | 
| +    return ok; | 
| +  } | 
| + | 
| class TestEncoder : public test::FakeEncoder { | 
| public: | 
| TestEncoder() | 
| @@ -432,13 +474,21 @@ class ViEEncoderTest : public ::testing::Test { | 
| : test_encoder_(test_encoder), encoded_frame_event_(false, false) {} | 
|  | 
| void WaitForEncodedFrame(int64_t expected_ntp_time) { | 
| +      EXPECT_TRUE( | 
| +          TimedWaitForEncodedFrame(expected_ntp_time, kDefaultTimeoutMs)); | 
| +    } | 
| + | 
| +    bool TimedWaitForEncodedFrame(int64_t expected_ntp_time, | 
| +                                  int64_t timeout_ms) { | 
| uint32_t timestamp = 0; | 
| -      EXPECT_TRUE(encoded_frame_event_.Wait(kDefaultTimeoutMs)); | 
| +      if (!encoded_frame_event_.Wait(timeout_ms)) | 
| +        return false; | 
| { | 
| rtc::CritScope lock(&crit_); | 
| timestamp = last_timestamp_; | 
| } | 
| test_encoder_->CheckLastTimeStampsMatch(expected_ntp_time, timestamp); | 
| +      return true; | 
| } | 
|  | 
| void WaitForEncodedFrame(uint32_t expected_width, | 
| @@ -517,18 +567,20 @@ class ViEEncoderTest : public ::testing::Test { | 
| VideoEncoderConfig video_encoder_config_; | 
| int codec_width_; | 
| int codec_height_; | 
| +  int max_framerate_; | 
| TestEncoder fake_encoder_; | 
| std::unique_ptr<MockableSendStatisticsProxy> stats_proxy_; | 
| TestSink sink_; | 
| AdaptingFrameForwarder video_source_; | 
| std::unique_ptr<ViEEncoderUnderTest> vie_encoder_; | 
| +  rtc::ScopedFakeClock fake_clock_; | 
| }; | 
|  | 
| TEST_F(ViEEncoderTest, EncodeOneFrame) { | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| rtc::Event frame_destroyed_event(false, false); | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, &frame_destroyed_event)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| EXPECT_TRUE(frame_destroyed_event.Wait(kDefaultTimeoutMs)); | 
| vie_encoder_->Stop(); | 
| } | 
| @@ -542,14 +594,14 @@ TEST_F(ViEEncoderTest, DropsFramesBeforeFirstOnBitrateUpdated) { | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, nullptr)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| vie_encoder_->Stop(); | 
| } | 
|  | 
| TEST_F(ViEEncoderTest, DropsFramesWhenRateSetToZero) { | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| vie_encoder_->OnBitrateUpdated(0, 0, 0); | 
| // Dropped since bitrate is zero. | 
| @@ -557,20 +609,20 @@ TEST_F(ViEEncoderTest, DropsFramesWhenRateSetToZero) { | 
|  | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| video_source_.IncomingCapturedFrame(CreateFrame(3, nullptr)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
| vie_encoder_->Stop(); | 
| } | 
|  | 
| TEST_F(ViEEncoderTest, DropsFramesWithSameOrOldNtpTimestamp) { | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| // This frame will be dropped since it has the same ntp timestamp. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, nullptr)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| vie_encoder_->Stop(); | 
| } | 
|  | 
| @@ -578,7 +630,7 @@ TEST_F(ViEEncoderTest, DropsFrameAfterStop) { | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| vie_encoder_->Stop(); | 
| sink_.SetExpectNoFrames(); | 
| @@ -592,13 +644,13 @@ TEST_F(ViEEncoderTest, DropsPendingFramesOnSlowEncode) { | 
|  | 
| fake_encoder_.BlockNextEncode(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // Here, the encoder thread will be blocked in the TestEncoder waiting for a | 
| // call to ContinueEncode. | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, nullptr)); | 
| video_source_.IncomingCapturedFrame(CreateFrame(3, nullptr)); | 
| fake_encoder_.ContinueEncode(); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
|  | 
| vie_encoder_->Stop(); | 
| } | 
| @@ -609,7 +661,7 @@ TEST_F(ViEEncoderTest, ConfigureEncoderTriggersOnEncoderConfigurationChanged) { | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // The encoder will have been configured once when the first frame is | 
| // received. | 
| EXPECT_EQ(1, sink_.number_of_reconfigurations()); | 
| @@ -622,7 +674,7 @@ TEST_F(ViEEncoderTest, ConfigureEncoderTriggersOnEncoderConfigurationChanged) { | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, nullptr)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| EXPECT_EQ(2, sink_.number_of_reconfigurations()); | 
| EXPECT_EQ(9999, sink_.last_min_transmit_bitrate()); | 
|  | 
| @@ -634,7 +686,7 @@ TEST_F(ViEEncoderTest, FrameResolutionChangeReconfigureEncoder) { | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // The encoder will have been configured once. | 
| EXPECT_EQ(1, sink_.number_of_reconfigurations()); | 
| EXPECT_EQ(codec_width_, fake_encoder_.codec_config().width); | 
| @@ -645,7 +697,7 @@ TEST_F(ViEEncoderTest, FrameResolutionChangeReconfigureEncoder) { | 
| // Capture a frame with a higher resolution and wait for it to synchronize | 
| // with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, nullptr)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| EXPECT_EQ(codec_width_, fake_encoder_.codec_config().width); | 
| EXPECT_EQ(codec_height_, fake_encoder_.codec_config().height); | 
| EXPECT_EQ(2, sink_.number_of_reconfigurations()); | 
| @@ -657,12 +709,12 @@ TEST_F(ViEEncoderTest, Vp8ResilienceIsOffFor1S1TLWithNackEnabled) { | 
| const bool kNackEnabled = true; | 
| const size_t kNumStreams = 1; | 
| const size_t kNumTl = 1; | 
| -  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled); | 
| +  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled, false); | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // The encoder have been configured once when the first frame is received. | 
| EXPECT_EQ(1, sink_.number_of_reconfigurations()); | 
| EXPECT_EQ(kVideoCodecVP8, fake_encoder_.codec_config().codecType); | 
| @@ -677,12 +729,12 @@ TEST_F(ViEEncoderTest, Vp8ResilienceIsOffFor2S1TlWithNackEnabled) { | 
| const bool kNackEnabled = true; | 
| const size_t kNumStreams = 2; | 
| const size_t kNumTl = 1; | 
| -  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled); | 
| +  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled, false); | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // The encoder have been configured once when the first frame is received. | 
| EXPECT_EQ(1, sink_.number_of_reconfigurations()); | 
| EXPECT_EQ(kVideoCodecVP8, fake_encoder_.codec_config().codecType); | 
| @@ -697,12 +749,12 @@ TEST_F(ViEEncoderTest, Vp8ResilienceIsOnFor1S1TLWithNackDisabled) { | 
| const bool kNackEnabled = false; | 
| const size_t kNumStreams = 1; | 
| const size_t kNumTl = 1; | 
| -  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled); | 
| +  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled, false); | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // The encoder have been configured once when the first frame is received. | 
| EXPECT_EQ(1, sink_.number_of_reconfigurations()); | 
| EXPECT_EQ(kVideoCodecVP8, fake_encoder_.codec_config().codecType); | 
| @@ -717,12 +769,12 @@ TEST_F(ViEEncoderTest, Vp8ResilienceIsOnFor1S2TlWithNackEnabled) { | 
| const bool kNackEnabled = true; | 
| const size_t kNumStreams = 1; | 
| const size_t kNumTl = 2; | 
| -  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled); | 
| +  ResetEncoder("VP8", kNumStreams, kNumTl, kNackEnabled, false); | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
|  | 
| // Capture a frame and wait for it to synchronize with the encoder thread. | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, nullptr)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| // The encoder have been configured once when the first frame is received. | 
| EXPECT_EQ(1, sink_.number_of_reconfigurations()); | 
| EXPECT_EQ(kVideoCodecVP8, fake_encoder_.codec_config().codecType); | 
| @@ -766,7 +818,7 @@ TEST_F(ViEEncoderTest, SinkWantsFromOveruseDetector) { | 
| for (int i = 1; i <= kMaxDowngrades; ++i) { | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(i, frame_width, frame_height)); | 
| -    sink_.WaitForEncodedFrame(i); | 
| +    WaitForEncodedFrame(i); | 
|  | 
| vie_encoder_->TriggerCpuOveruse(); | 
|  | 
| @@ -785,7 +837,7 @@ TEST_F(ViEEncoderTest, SinkWantsFromOveruseDetector) { | 
| rtc::VideoSinkWants current_wants = video_source_.sink_wants(); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(kMaxDowngrades + 1, frame_width, frame_height)); | 
| -  sink_.WaitForEncodedFrame(kMaxDowngrades + 1); | 
| +  WaitForEncodedFrame(kMaxDowngrades + 1); | 
| vie_encoder_->TriggerCpuOveruse(); | 
| EXPECT_EQ(video_source_.sink_wants().target_pixel_count, | 
| current_wants.target_pixel_count); | 
| @@ -820,14 +872,14 @@ TEST_F(ViEEncoderTest, SinkWantsStoredByDegradationPreference) { | 
|  | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(frame_timestamp, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(frame_timestamp); | 
| +  WaitForEncodedFrame(frame_timestamp); | 
| frame_timestamp += kFrameIntervalMs; | 
|  | 
| // Trigger CPU overuse. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(frame_timestamp, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(frame_timestamp); | 
| +  WaitForEncodedFrame(frame_timestamp); | 
| frame_timestamp += kFrameIntervalMs; | 
|  | 
| // Default degradation preference is maintain-framerate, so will lower max | 
| @@ -857,7 +909,7 @@ TEST_F(ViEEncoderTest, SinkWantsStoredByDegradationPreference) { | 
| vie_encoder_->TriggerCpuOveruse(); | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(frame_timestamp, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(frame_timestamp); | 
| +  WaitForEncodedFrame(frame_timestamp); | 
| frame_timestamp += kFrameIntervalMs; | 
|  | 
| // Some framerate constraint should be set. | 
| @@ -875,7 +927,7 @@ TEST_F(ViEEncoderTest, SinkWantsStoredByDegradationPreference) { | 
| vie_encoder_->TriggerCpuOveruse(); | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(frame_timestamp, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(frame_timestamp); | 
| +  WaitForEncodedFrame(frame_timestamp); | 
| frame_timestamp += kFrameIntervalMs; | 
|  | 
| // Still no degradation. | 
| @@ -909,7 +961,7 @@ TEST_F(ViEEncoderTest, StatsTracksQualityAdaptationStats) { | 
| const int kWidth = 1280; | 
| const int kHeight = 720; | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| VideoSendStream::Stats stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_EQ(0, stats.number_of_quality_adapt_changes); | 
| @@ -917,7 +969,7 @@ TEST_F(ViEEncoderTest, StatsTracksQualityAdaptationStats) { | 
| // Trigger adapt down. | 
| vie_encoder_->TriggerQualityLow(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
|  | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.bw_limited_resolution); | 
| @@ -926,7 +978,7 @@ TEST_F(ViEEncoderTest, StatsTracksQualityAdaptationStats) { | 
| // Trigger adapt up. | 
| vie_encoder_->TriggerQualityHigh(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
|  | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| @@ -942,7 +994,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStats) { | 
| const int kWidth = 1280; | 
| const int kHeight = 720; | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| VideoSendStream::Stats stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| EXPECT_EQ(0, stats.number_of_cpu_adapt_changes); | 
| @@ -950,7 +1002,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStats) { | 
| // Trigger CPU overuse. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
|  | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| @@ -959,7 +1011,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStats) { | 
| // Trigger CPU normal use. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
|  | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -975,7 +1027,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsCpuAdaptation) { | 
| const int kWidth = 1280; | 
| const int kHeight = 720; | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| VideoSendStream::Stats stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -984,7 +1036,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsCpuAdaptation) { | 
| // Trigger CPU overuse. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| @@ -997,7 +1049,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsCpuAdaptation) { | 
| VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| new_video_source.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| @@ -1009,7 +1061,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsCpuAdaptation) { | 
| VideoSendStream::DegradationPreference::kDegradationDisabled); | 
|  | 
| new_video_source.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(4); | 
| +  WaitForEncodedFrame(4); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -1021,7 +1073,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsCpuAdaptation) { | 
| VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| new_video_source.IncomingCapturedFrame(CreateFrame(5, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(5); | 
| +  WaitForEncodedFrame(5); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| @@ -1030,7 +1082,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsCpuAdaptation) { | 
| // Trigger CPU normal use. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| new_video_source.IncomingCapturedFrame(CreateFrame(6, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(6); | 
| +  WaitForEncodedFrame(6); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -1046,7 +1098,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsQualityAdaptation) { | 
| const int kWidth = 1280; | 
| const int kHeight = 720; | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| VideoSendStream::Stats stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.bw_limited_framerate); | 
| @@ -1058,7 +1110,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsQualityAdaptation) { | 
| VideoSendStream::DegradationPreference::kBalanced); | 
|  | 
| new_video_source.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.bw_limited_framerate); | 
| @@ -1067,7 +1119,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsQualityAdaptation) { | 
| // Trigger adapt down. | 
| vie_encoder_->TriggerQualityLow(); | 
| new_video_source.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.bw_limited_framerate); | 
| @@ -1078,7 +1130,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsQualityAdaptation) { | 
| VideoSendStream::DegradationPreference::kBalanced); | 
|  | 
| new_video_source.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(4); | 
| +  WaitForEncodedFrame(4); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.bw_limited_framerate); | 
| @@ -1090,7 +1142,7 @@ TEST_F(ViEEncoderTest, SwitchingSourceKeepsQualityAdaptation) { | 
| VideoSendStream::DegradationPreference::kMaintainResolution); | 
|  | 
| new_video_source.IncomingCapturedFrame(CreateFrame(5, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(5); | 
| +  WaitForEncodedFrame(5); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.bw_limited_resolution); | 
| EXPECT_FALSE(stats.bw_limited_framerate); | 
| @@ -1107,7 +1159,7 @@ TEST_F(ViEEncoderTest, QualityAdaptationStatsAreResetWhenScalerIsDisabled) { | 
| const int kHeight = 720; | 
| video_source_.set_adaptation_enabled(true); | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1115,7 +1167,7 @@ TEST_F(ViEEncoderTest, QualityAdaptationStatsAreResetWhenScalerIsDisabled) { | 
| // Trigger adapt down. | 
| vie_encoder_->TriggerQualityLow(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1123,7 +1175,7 @@ TEST_F(ViEEncoderTest, QualityAdaptationStatsAreResetWhenScalerIsDisabled) { | 
| // Trigger overuse. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution); | 
| EXPECT_EQ(1, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1135,7 +1187,7 @@ TEST_F(ViEEncoderTest, QualityAdaptationStatsAreResetWhenScalerIsDisabled) { | 
| VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(4); | 
| +  WaitForEncodedFrame(4); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution); | 
| EXPECT_EQ(1, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1151,7 +1203,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| int sequence = 1; | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| VideoSendStream::Stats stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_framerate); | 
| @@ -1160,7 +1212,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| // Trigger CPU overuse, should now adapt down. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_framerate); | 
| @@ -1174,7 +1226,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
|  | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_framerate); | 
| @@ -1186,7 +1238,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| VideoSendStream::DegradationPreference::kMaintainResolution); | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| // Not adapted at first. | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -1203,7 +1255,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
|  | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
|  | 
| // Framerate now adapted. | 
| stats = stats_proxy_->GetStats(); | 
| @@ -1217,7 +1269,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| VideoSendStream::DegradationPreference::kDegradationDisabled); | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
|  | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -1239,7 +1291,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| &video_source_, | 
| VideoSendStream::DegradationPreference::kMaintainFramerate); | 
| video_source_.IncomingCapturedFrame(CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_TRUE(stats.cpu_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_framerate); | 
| @@ -1248,7 +1300,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| // Trigger CPU normal usage. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| video_source_.IncomingCapturedFrame(CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_framerate); | 
| @@ -1260,7 +1312,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| VideoSendStream::DegradationPreference::kMaintainResolution); | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| // Disabled, since we previously switched the source to disabled. | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| @@ -1271,7 +1323,7 @@ TEST_F(ViEEncoderTest, StatsTracksCpuAdaptationStatsWhenSwitchingSource) { | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| new_video_source.IncomingCapturedFrame( | 
| CreateFrame(sequence, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(sequence++); | 
| +  WaitForEncodedFrame(sequence++); | 
| stats = stats_proxy_->GetStats(); | 
| EXPECT_FALSE(stats.cpu_limited_resolution); | 
| EXPECT_FALSE(stats.cpu_limited_framerate); | 
| @@ -1287,7 +1339,7 @@ TEST_F(ViEEncoderTest, StatsTracksPreferredBitrate) { | 
| const int kWidth = 1280; | 
| const int kHeight = 720; | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| VideoSendStream::Stats stats = stats_proxy_->GetStats(); | 
| EXPECT_EQ(video_encoder_config_.max_bitrate_bps, | 
| @@ -1305,13 +1357,13 @@ TEST_F(ViEEncoderTest, ScalingUpAndDownDoesNothingWithMaintainResolution) { | 
| VerifyNoLimitation(video_source_.sink_wants()); | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| // Trigger scale down. | 
| vie_encoder_->TriggerQualityLow(); | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
|  | 
| // Expect a scale down. | 
| EXPECT_TRUE(video_source_.sink_wants().max_pixel_count); | 
| @@ -1326,7 +1378,7 @@ TEST_F(ViEEncoderTest, ScalingUpAndDownDoesNothingWithMaintainResolution) { | 
| // Trigger scale down. | 
| vie_encoder_->TriggerQualityLow(); | 
| new_video_source.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
|  | 
| // Expect no scaling. | 
| EXPECT_EQ(std::numeric_limits<int>::max(), | 
| @@ -1335,7 +1387,7 @@ TEST_F(ViEEncoderTest, ScalingUpAndDownDoesNothingWithMaintainResolution) { | 
| // Trigger scale up. | 
| vie_encoder_->TriggerQualityHigh(); | 
| new_video_source.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(4); | 
| +  WaitForEncodedFrame(4); | 
|  | 
| // Expect nothing to change, still no scaling. | 
| EXPECT_EQ(std::numeric_limits<int>::max(), | 
| @@ -1355,7 +1407,7 @@ TEST_F(ViEEncoderTest, SkipsSameAdaptDownRequest_MaintainFramerateMode) { | 
| &source, VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| source.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1387,7 +1439,7 @@ TEST_F(ViEEncoderTest, NoChangeForInitialNormalUsage_MaintainFramerateMode) { | 
| &source, VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| source.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(kWidth, kHeight); | 
| +  WaitForEncodedFrame(kWidth, kHeight); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1412,7 +1464,7 @@ TEST_F(ViEEncoderTest, NoChangeForInitialNormalUsage_MaintainResolutionMode) { | 
| &source, VideoSendStream::DegradationPreference::kMaintainResolution); | 
|  | 
| source.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(kWidth, kHeight); | 
| +  WaitForEncodedFrame(kWidth, kHeight); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_framerate); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1465,7 +1517,7 @@ TEST_F(ViEEncoderTest, AdaptsResolutionForLowQuality_MaintainFramerateMode) { | 
| &source, VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| source.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_quality_adapt_changes); | 
| @@ -1473,7 +1525,7 @@ TEST_F(ViEEncoderTest, AdaptsResolutionForLowQuality_MaintainFramerateMode) { | 
| // Trigger adapt down, expect scaled down resolution. | 
| vie_encoder_->TriggerQualityLow(); | 
| source.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| VerifyFpsMaxResolutionLt(source.sink_wants(), kWidth * kHeight); | 
| EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution); | 
| EXPECT_EQ(1, stats_proxy_->GetStats().number_of_quality_adapt_changes); | 
| @@ -1546,7 +1598,7 @@ TEST_F(ViEEncoderTest, DoesNotScaleBelowSetResolutionLimit) { | 
| int downscales = 0; | 
| for (size_t i = 1; i <= kNumFrames; i++) { | 
| video_source_.IncomingCapturedFrame(CreateFrame(i, kWidth, kHeight)); | 
| -    sink_.WaitForEncodedFrame(i); | 
| +    WaitForEncodedFrame(i); | 
|  | 
| // Trigger scale down. | 
| rtc::VideoSinkWants last_wants = video_source_.sink_wants(); | 
| @@ -1577,7 +1629,7 @@ TEST_F(ViEEncoderTest, | 
| &source, VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| source.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(kWidth, kHeight); | 
| +  WaitForEncodedFrame(kWidth, kHeight); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1585,7 +1637,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger adapt down, expect scaled down resolution. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| source.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| VerifyFpsMaxResolutionLt(source.sink_wants(), kWidth * kHeight); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_EQ(1, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1593,7 +1645,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger adapt up, expect no restriction. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| source.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(kWidth, kHeight); | 
| +  WaitForEncodedFrame(kWidth, kHeight); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_EQ(2, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1601,7 +1653,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger adapt down, expect scaled down resolution. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| source.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(4); | 
| +  WaitForEncodedFrame(4); | 
| VerifyFpsMaxResolutionLt(source.sink_wants(), kWidth * kHeight); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_EQ(3, stats_proxy_->GetStats().number_of_cpu_adapt_changes); | 
| @@ -1630,7 +1682,7 @@ TEST_F(ViEEncoderTest, | 
| &source, VideoSendStream::DegradationPreference::kMaintainFramerate); | 
|  | 
| source.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(kWidth, kHeight); | 
| +  WaitForEncodedFrame(kWidth, kHeight); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution); | 
| @@ -1640,7 +1692,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger cpu adapt down, expect scaled down resolution (960x540). | 
| vie_encoder_->TriggerCpuOveruse(); | 
| source.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(2); | 
| +  WaitForEncodedFrame(2); | 
| VerifyFpsMaxResolutionLt(source.sink_wants(), kWidth * kHeight); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution); | 
| @@ -1650,7 +1702,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger cpu adapt down, expect scaled down resolution (640x360). | 
| vie_encoder_->TriggerCpuOveruse(); | 
| source.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(3); | 
| +  WaitForEncodedFrame(3); | 
| VerifyFpsMaxResolutionLt(source.sink_wants(), source.last_wants()); | 
| rtc::VideoSinkWants last_wants = source.sink_wants(); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| @@ -1661,7 +1713,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger cpu adapt down, max cpu downgrades reached, expect no change. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| source.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(4); | 
| +  WaitForEncodedFrame(4); | 
| VerifyFpsEqResolutionEq(source.sink_wants(), last_wants); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution); | 
| @@ -1671,7 +1723,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger quality adapt down, expect scaled down resolution (480x270). | 
| vie_encoder_->TriggerQualityLow(); | 
| source.IncomingCapturedFrame(CreateFrame(5, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(5); | 
| +  WaitForEncodedFrame(5); | 
| VerifyFpsMaxResolutionLt(source.sink_wants(), source.last_wants()); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution); | 
| @@ -1681,7 +1733,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger cpu adapt up, expect upscaled resolution (640x360). | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| source.IncomingCapturedFrame(CreateFrame(6, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(6); | 
| +  WaitForEncodedFrame(6); | 
| VerifyFpsMaxResolutionGt(source.sink_wants(), source.last_wants()); | 
| EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution); | 
| @@ -1691,7 +1743,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger cpu adapt up, expect upscaled resolution (960x540). | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| source.IncomingCapturedFrame(CreateFrame(7, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(7); | 
| +  WaitForEncodedFrame(7); | 
| VerifyFpsMaxResolutionGt(source.sink_wants(), source.last_wants()); | 
| last_wants = source.sink_wants(); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| @@ -1702,7 +1754,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger cpu adapt up, no cpu downgrades, expect no change (960x540). | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| source.IncomingCapturedFrame(CreateFrame(8, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(8); | 
| +  WaitForEncodedFrame(8); | 
| VerifyFpsEqResolutionEq(source.sink_wants(), last_wants); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution); | 
| @@ -1712,7 +1764,7 @@ TEST_F(ViEEncoderTest, | 
| // Trigger quality adapt up, expect no restriction (1280x720). | 
| vie_encoder_->TriggerQualityHigh(); | 
| source.IncomingCapturedFrame(CreateFrame(9, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(kWidth, kHeight); | 
| +  WaitForEncodedFrame(kWidth, kHeight); | 
| VerifyFpsMaxResolutionGt(source.sink_wants(), source.last_wants()); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| @@ -1724,21 +1776,21 @@ TEST_F(ViEEncoderTest, | 
| } | 
|  | 
| TEST_F(ViEEncoderTest, CpuLimitedHistogramIsReported) { | 
| -  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| const int kWidth = 640; | 
| const int kHeight = 360; | 
|  | 
| +  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| + | 
| for (int i = 1; i <= SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
| video_source_.IncomingCapturedFrame(CreateFrame(i, kWidth, kHeight)); | 
| -    sink_.WaitForEncodedFrame(i); | 
| +    WaitForEncodedFrame(i); | 
| } | 
|  | 
| vie_encoder_->TriggerCpuOveruse(); | 
| for (int i = 1; i <= SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
| video_source_.IncomingCapturedFrame(CreateFrame( | 
| SendStatisticsProxy::kMinRequiredMetricsSamples + i, kWidth, kHeight)); | 
| -    sink_.WaitForEncodedFrame(SendStatisticsProxy::kMinRequiredMetricsSamples + | 
| -                              i); | 
| +    WaitForEncodedFrame(SendStatisticsProxy::kMinRequiredMetricsSamples + i); | 
| } | 
|  | 
| vie_encoder_->Stop(); | 
| @@ -1762,7 +1814,7 @@ TEST_F(ViEEncoderTest, CpuLimitedHistogramIsNotReportedForDisabledDegradation) { | 
|  | 
| for (int i = 1; i <= SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
| video_source_.IncomingCapturedFrame(CreateFrame(i, kWidth, kHeight)); | 
| -    sink_.WaitForEncodedFrame(i); | 
| +    WaitForEncodedFrame(i); | 
| } | 
|  | 
| vie_encoder_->Stop(); | 
| @@ -1793,26 +1845,25 @@ TEST_F(ViEEncoderTest, CallsBitrateObserver) { | 
| const int64_t kStartTimeMs = 1; | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(kStartTimeMs, codec_width_, codec_height_)); | 
| -  sink_.WaitForEncodedFrame(kStartTimeMs); | 
| +  WaitForEncodedFrame(kStartTimeMs); | 
|  | 
| // Not called on second frame. | 
| EXPECT_CALL(bitrate_observer, OnBitrateAllocationUpdated(expected_bitrate)) | 
| .Times(0); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(kStartTimeMs + 1, codec_width_, codec_height_)); | 
| -  sink_.WaitForEncodedFrame(kStartTimeMs + 1); | 
| +  WaitForEncodedFrame(kStartTimeMs + 1); | 
|  | 
| // Called after a process interval. | 
| const int64_t kProcessIntervalMs = | 
| vcm::VCMProcessTimer::kDefaultProcessIntervalMs; | 
| -  // TODO(sprang): ViEEncoder should die and/or get injectable clock. | 
| -  // Sleep for one processing interval plus one frame to avoid flakiness. | 
| -  SleepMs(kProcessIntervalMs + 1000 / kDefaultFps); | 
| +  fake_clock_.AdvanceTimeMicros(rtc::kNumMicrosecsPerMillisec * | 
| +                                (kProcessIntervalMs + (1000 / kDefaultFps))); | 
| EXPECT_CALL(bitrate_observer, OnBitrateAllocationUpdated(expected_bitrate)) | 
| .Times(1); | 
| video_source_.IncomingCapturedFrame(CreateFrame( | 
| kStartTimeMs + kProcessIntervalMs, codec_width_, codec_height_)); | 
| -  sink_.WaitForEncodedFrame(kStartTimeMs + kProcessIntervalMs); | 
| +  WaitForEncodedFrame(kStartTimeMs + kProcessIntervalMs); | 
|  | 
| vie_encoder_->Stop(); | 
| } | 
| @@ -1826,7 +1877,7 @@ TEST_F(ViEEncoderTest, DropsFramesAndScalesWhenBitrateIsTooLow) { | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
|  | 
| // Expect to drop this frame, the wait should time out. | 
| -  sink_.ExpectDroppedFrame(); | 
| +  ExpectDroppedFrame(); | 
|  | 
| // Expect the sink_wants to specify a scaled frame. | 
| EXPECT_LT(video_source_.sink_wants().max_pixel_count, kWidth * kHeight); | 
| @@ -1838,7 +1889,7 @@ TEST_F(ViEEncoderTest, DropsFramesAndScalesWhenBitrateIsTooLow) { | 
| CreateFrame(2, kWidth * 3 / 4, kHeight * 3 / 4)); | 
|  | 
| // Expect to drop this frame, the wait should time out. | 
| -  sink_.ExpectDroppedFrame(); | 
| +  ExpectDroppedFrame(); | 
|  | 
| EXPECT_LT(video_source_.sink_wants().max_pixel_count, last_pixel_count); | 
|  | 
| @@ -1855,11 +1906,11 @@ TEST_F(ViEEncoderTest, NumberOfDroppedFramesLimitedWhenBitrateIsTooLow) { | 
| int i; | 
| for (i = 1; i <= kMaxInitialFramedrop; ++i) { | 
| video_source_.IncomingCapturedFrame(CreateFrame(i, kWidth, kHeight)); | 
| -    sink_.ExpectDroppedFrame(); | 
| +    ExpectDroppedFrame(); | 
| } | 
| // The n+1th frame should not be dropped, even though it's size is too large. | 
| video_source_.IncomingCapturedFrame(CreateFrame(i, kWidth, kHeight)); | 
| -  sink_.WaitForEncodedFrame(i); | 
| +  WaitForEncodedFrame(i); | 
|  | 
| // Expect the sink_wants to specify a scaled frame. | 
| EXPECT_LT(video_source_.sink_wants().max_pixel_count, kWidth * kHeight); | 
| @@ -1879,7 +1930,7 @@ TEST_F(ViEEncoderTest, InitialFrameDropOffWithMaintainResolutionPreference) { | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| // Frame should not be dropped, even if it's too large. | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| vie_encoder_->Stop(); | 
| } | 
| @@ -1896,7 +1947,7 @@ TEST_F(ViEEncoderTest, InitialFrameDropOffWhenEncoderDisabledScaling) { | 
|  | 
| video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight)); | 
| // Frame should not be dropped, even if it's too large. | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
|  | 
| vie_encoder_->Stop(); | 
| fake_encoder_.SetQualityScaling(true); | 
| @@ -1917,7 +1968,7 @@ TEST_F(ViEEncoderTest, | 
|  | 
| // Trigger adapt down, too small frame, expect no change. | 
| source.IncomingCapturedFrame(CreateFrame(1, kTooSmallWidth, kTooSmallHeight)); | 
| -  sink_.WaitForEncodedFrame(1); | 
| +  WaitForEncodedFrame(1); | 
| vie_encoder_->TriggerCpuOveruse(); | 
| VerifyNoLimitation(source.sink_wants()); | 
| EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution); | 
| @@ -1929,12 +1980,12 @@ TEST_F(ViEEncoderTest, | 
| TEST_F(ViEEncoderTest, FailingInitEncodeDoesntCauseCrash) { | 
| fake_encoder_.ForceInitEncodeFailure(true); | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| -  ResetEncoder("VP8", 2, 1, true); | 
| +  ResetEncoder("VP8", 2, 1, true, false); | 
| const int kFrameWidth = 1280; | 
| const int kFrameHeight = 720; | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(1, kFrameWidth, kFrameHeight)); | 
| -  sink_.ExpectDroppedFrame(); | 
| +  ExpectDroppedFrame(); | 
| vie_encoder_->Stop(); | 
| } | 
|  | 
| @@ -1950,29 +2001,28 @@ TEST_F(ViEEncoderTest, AdaptsResolutionOnOveruse_MaintainFramerateMode) { | 
|  | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(1, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(kFrameWidth, kFrameHeight); | 
| +  WaitForEncodedFrame(kFrameWidth, kFrameHeight); | 
|  | 
| // Trigger CPU overuse, downscale by 3/4. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(2, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame((kFrameWidth * 3) / 4, (kFrameHeight * 3) / 4); | 
| +  WaitForEncodedFrame((kFrameWidth * 3) / 4, (kFrameHeight * 3) / 4); | 
|  | 
| // Trigger CPU normal use, return to original resolution. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(3, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(kFrameWidth, kFrameHeight); | 
| +  WaitForEncodedFrame(kFrameWidth, kFrameHeight); | 
|  | 
| vie_encoder_->Stop(); | 
| } | 
|  | 
| TEST_F(ViEEncoderTest, AdaptsFramerateOnOveruse_MaintainResolutionMode) { | 
| -  const int kDefaultFramerateFps = 30; | 
| -  const int kFrameIntervalMs = rtc::kNumMillisecsPerSec / kDefaultFramerateFps; | 
| +  // const int kDefaultFramerateFps = 30; | 
| const int kFrameWidth = 1280; | 
| const int kFrameHeight = 720; | 
| -  rtc::ScopedFakeClock fake_clock; | 
| +  int kFrameIntervalMs = rtc::kNumMillisecsPerSec / max_framerate_; | 
|  | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| vie_encoder_->SetSource( | 
| @@ -1980,93 +2030,82 @@ TEST_F(ViEEncoderTest, AdaptsFramerateOnOveruse_MaintainResolutionMode) { | 
| VideoSendStream::DegradationPreference::kMaintainResolution); | 
| video_source_.set_adaptation_enabled(true); | 
|  | 
| -  fake_clock.SetTimeMicros(kFrameIntervalMs * 1000); | 
| -  int64_t timestamp_ms = kFrameIntervalMs; | 
| +  int64_t timestamp_ms = fake_clock_.TimeNanos() / rtc::kNumNanosecsPerMillisec; | 
|  | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -  sink_.WaitForEncodedFrame(timestamp_ms); | 
| +  WaitForEncodedFrame(timestamp_ms); | 
|  | 
| // Try to trigger overuse. No fps estimate available => no effect. | 
| vie_encoder_->TriggerCpuOveruse(); | 
|  | 
| // Insert frames for one second to get a stable estimate. | 
| -  for (int i = 0; i < kDefaultFramerateFps; ++i) { | 
| +  for (int i = 0; i < max_framerate_; ++i) { | 
| timestamp_ms += kFrameIntervalMs; | 
| -    fake_clock.AdvanceTimeMicros(kFrameIntervalMs * 1000); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -    sink_.WaitForEncodedFrame(timestamp_ms); | 
| +    WaitForEncodedFrame(timestamp_ms); | 
| } | 
|  | 
| // Trigger CPU overuse, reduce framerate by 2/3. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| int num_frames_dropped = 0; | 
| -  for (int i = 0; i < kDefaultFramerateFps; ++i) { | 
| +  for (int i = 0; i < max_framerate_; ++i) { | 
| timestamp_ms += kFrameIntervalMs; | 
| -    fake_clock.AdvanceTimeMicros(kFrameIntervalMs * 1000); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -    if (!sink_.WaitForFrame(kFrameTimeoutMs)) { | 
| +    if (!WaitForFrame(kFrameTimeoutMs)) { | 
| ++num_frames_dropped; | 
| } else { | 
| sink_.CheckLastFrameSizeMathces(kFrameWidth, kFrameHeight); | 
| } | 
| } | 
|  | 
| -  // TODO(sprang): Find where there's rounding errors or stuff causing the | 
| -  // margin here to be a little larger than we'd like (input fps estimate is | 
| -  // off) and the frame dropping is a little too aggressive. | 
| -  const int kErrorMargin = 5; | 
| -  EXPECT_NEAR(num_frames_dropped, | 
| -              kDefaultFramerateFps - (kDefaultFramerateFps * 2 / 3), | 
| +  // Add some slack to account for frames dropped by the frame dropper. | 
| +  const int kErrorMargin = 1; | 
| +  EXPECT_NEAR(num_frames_dropped, max_framerate_ - (max_framerate_ * 2 / 3), | 
| kErrorMargin); | 
|  | 
| // Trigger CPU overuse, reduce framerate by 2/3 again. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| num_frames_dropped = 0; | 
| -  for (int i = 0; i < kDefaultFramerateFps; ++i) { | 
| +  for (int i = 0; i < max_framerate_; ++i) { | 
| timestamp_ms += kFrameIntervalMs; | 
| -    fake_clock.AdvanceTimeMicros(kFrameIntervalMs * 1000); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -    if (!sink_.WaitForFrame(kFrameTimeoutMs)) { | 
| +    if (!WaitForFrame(kFrameTimeoutMs)) { | 
| ++num_frames_dropped; | 
| } else { | 
| sink_.CheckLastFrameSizeMathces(kFrameWidth, kFrameHeight); | 
| } | 
| } | 
| -  EXPECT_NEAR(num_frames_dropped, | 
| -              kDefaultFramerateFps - (kDefaultFramerateFps * 4 / 9), | 
| +  EXPECT_NEAR(num_frames_dropped, max_framerate_ - (max_framerate_ * 4 / 9), | 
| kErrorMargin); | 
|  | 
| // Go back up one step. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| num_frames_dropped = 0; | 
| -  for (int i = 0; i < kDefaultFramerateFps; ++i) { | 
| +  for (int i = 0; i < max_framerate_; ++i) { | 
| timestamp_ms += kFrameIntervalMs; | 
| -    fake_clock.AdvanceTimeMicros(kFrameIntervalMs * 1000); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -    if (!sink_.WaitForFrame(kFrameTimeoutMs)) { | 
| +    if (!WaitForFrame(kFrameTimeoutMs)) { | 
| ++num_frames_dropped; | 
| } else { | 
| sink_.CheckLastFrameSizeMathces(kFrameWidth, kFrameHeight); | 
| } | 
| } | 
| -  EXPECT_NEAR(num_frames_dropped, | 
| -              kDefaultFramerateFps - (kDefaultFramerateFps * 2 / 3), | 
| +  EXPECT_NEAR(num_frames_dropped, max_framerate_ - (max_framerate_ * 2 / 3), | 
| kErrorMargin); | 
|  | 
| // Go back up to original mode. | 
| vie_encoder_->TriggerCpuNormalUsage(); | 
| num_frames_dropped = 0; | 
| -  for (int i = 0; i < kDefaultFramerateFps; ++i) { | 
| +  for (int i = 0; i < max_framerate_; ++i) { | 
| timestamp_ms += kFrameIntervalMs; | 
| -    fake_clock.AdvanceTimeMicros(kFrameIntervalMs * 1000); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -    if (!sink_.WaitForFrame(kFrameTimeoutMs)) { | 
| +    if (!WaitForFrame(kFrameTimeoutMs)) { | 
| ++num_frames_dropped; | 
| } else { | 
| sink_.CheckLastFrameSizeMathces(kFrameWidth, kFrameHeight); | 
| @@ -2084,15 +2123,17 @@ TEST_F(ViEEncoderTest, DoesntAdaptDownPastMinFramerate) { | 
| const int kFrameWidth = 1280; | 
| const int kFrameHeight = 720; | 
|  | 
| -  rtc::ScopedFakeClock fake_clock; | 
| +  // Reconfigure encoder with two temporal layers and screensharing, which will | 
| +  // disable frame dropping and make testing easier. | 
| +  ResetEncoder("VP8", 1, 2, true, true); | 
| + | 
| vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| vie_encoder_->SetSource( | 
| &video_source_, | 
| VideoSendStream::DegradationPreference::kMaintainResolution); | 
| video_source_.set_adaptation_enabled(true); | 
|  | 
| -  fake_clock.SetTimeMicros(kFrameIntervalMs * 1000); | 
| -  int64_t timestamp_ms = kFrameIntervalMs; | 
| +  int64_t timestamp_ms = fake_clock_.TimeNanos() / rtc::kNumNanosecsPerMillisec; | 
|  | 
| // Trigger overuse as much as we can. | 
| for (int i = 0; i < ViEEncoder::kMaxCpuResolutionDowngrades; ++i) { | 
| @@ -2101,23 +2142,72 @@ TEST_F(ViEEncoderTest, DoesntAdaptDownPastMinFramerate) { | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| timestamp_ms += kFrameIntervalMs; | 
| -      fake_clock.AdvanceTimeMicros(kFrameIntervalMs * 1000); | 
| } | 
| // ...and then try to adapt again. | 
| vie_encoder_->TriggerCpuOveruse(); | 
| } | 
|  | 
| // Drain any frame in the pipeline. | 
| -  sink_.WaitForFrame(kDefaultTimeoutMs); | 
| +  WaitForFrame(kDefaultTimeoutMs); | 
|  | 
| // Insert frames at min fps, all should go through. | 
| for (int i = 0; i < 10; ++i) { | 
| timestamp_ms += kMinFpsFrameInterval; | 
| -    fake_clock.AdvanceTimeMicros(kMinFpsFrameInterval * 1000); | 
| video_source_.IncomingCapturedFrame( | 
| CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| -    sink_.WaitForEncodedFrame(timestamp_ms); | 
| +    WaitForEncodedFrame(timestamp_ms); | 
| } | 
| vie_encoder_->Stop(); | 
| } | 
| + | 
| +TEST_F(ViEEncoderTest, PriodicallyUpdatesChannelParameters) { | 
| +  const int kFrameWidth = 1280; | 
| +  const int kFrameHeight = 720; | 
| +  const int kLowFps = 2; | 
| +  const int kHighFps = 30; | 
| + | 
| +  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| + | 
| +  int64_t timestamp_ms = fake_clock_.TimeNanos() / rtc::kNumNanosecsPerMillisec; | 
| +  max_framerate_ = kLowFps; | 
| + | 
| +  // Insert 2 seconds of 2fps video. | 
| +  for (int i = 0; i < kLowFps * 2; ++i) { | 
| +    video_source_.IncomingCapturedFrame( | 
| +        CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| +    WaitForEncodedFrame(timestamp_ms); | 
| +    timestamp_ms += 1000 / kLowFps; | 
| +  } | 
| + | 
| +  // Make sure encoder is updated with new target. | 
| +  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0); | 
| +  video_source_.IncomingCapturedFrame( | 
| +      CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| +  WaitForEncodedFrame(timestamp_ms); | 
| +  timestamp_ms += 1000 / kLowFps; | 
| + | 
| +  EXPECT_EQ(kLowFps, fake_encoder_.GetConfiguredInputFramerate()); | 
| + | 
| +  // Insert 30fps frames for just a little more than the forced update period. | 
| +  const int kVcmTimerIntervalFrames = | 
| +      (vcm::VCMProcessTimer::kDefaultProcessIntervalMs * kHighFps) / 1000; | 
| +  const int kFrameIntervalMs = 1000 / kHighFps; | 
| +  max_framerate_ = kHighFps; | 
| +  for (int i = 0; i < kVcmTimerIntervalFrames + 2; ++i) { | 
| +    video_source_.IncomingCapturedFrame( | 
| +        CreateFrame(timestamp_ms, kFrameWidth, kFrameHeight)); | 
| +    // Wait for encoded frame, but skip ahead if it doesn't arrive as it might | 
| +    // be dropped if the encoder hans't been updated with the new higher target | 
| +    // framerate yet, causing it to overshoot the target bitrate and then | 
| +    // suffering the wrath of the media optimizer. | 
| +    TimedWaitForEncodedFrame(timestamp_ms, 2 * kFrameIntervalMs); | 
| +    timestamp_ms += kFrameIntervalMs; | 
| +  } | 
| + | 
| +  // Don expect correct measurement just yet, but it should be higher than | 
| +  // before. | 
| +  EXPECT_GT(fake_encoder_.GetConfiguredInputFramerate(), kLowFps); | 
| + | 
| +  vie_encoder_->Stop(); | 
| +} | 
| }  // namespace webrtc | 
|  |