| /* | 
 |  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 
 |  * | 
 |  *  Use of this source code is governed by a BSD-style license | 
 |  *  that can be found in the LICENSE file in the root of the source | 
 |  *  tree. An additional intellectual property rights grant can be found | 
 |  *  in the file PATENTS.  All contributing project authors may | 
 |  *  be found in the AUTHORS file in the root of the source tree. | 
 |  */ | 
 |  | 
 | #include "video/send_statistics_proxy.h" | 
 |  | 
 | #include <algorithm> | 
 | #include <map> | 
 | #include <memory> | 
 | #include <string> | 
 | #include <vector> | 
 |  | 
 | #include "absl/algorithm/container.h" | 
 | #include "api/units/timestamp.h" | 
 | #include "api/video/video_adaptation_reason.h" | 
 | #include "api/video/video_bitrate_allocation.h" | 
 | #include "api/video/video_codec_type.h" | 
 | #include "api/video_codecs/scalability_mode.h" | 
 | #include "api/video_codecs/video_codec.h" | 
 | #include "rtc_base/fake_clock.h" | 
 | #include "system_wrappers/include/metrics.h" | 
 | #include "test/gmock.h" | 
 | #include "test/gtest.h" | 
 | #include "test/scoped_key_value_config.h" | 
 | #include "video/config/video_encoder_config.h" | 
 | #include "video/video_stream_encoder_observer.h" | 
 |  | 
 | namespace webrtc { | 
 | namespace { | 
 |  | 
 | using ::testing::Optional; | 
 |  | 
 | const uint32_t kFirstSsrc = 17; | 
 | const uint32_t kSecondSsrc = 42; | 
 | const uint32_t kFirstRtxSsrc = 18; | 
 | const uint32_t kSecondRtxSsrc = 43; | 
 | const uint32_t kFlexFecSsrc = 55; | 
 | const int kFpsPeriodicIntervalMs = 2000; | 
 | const int kWidth = 640; | 
 | const int kHeight = 480; | 
 | const int kQpIdx0 = 21; | 
 | const int kQpIdx1 = 39; | 
 | const int kRtpClockRateHz = 90000; | 
 | const CodecSpecificInfo kDefaultCodecInfo = []() { | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP8; | 
 |   return codec_info; | 
 | }(); | 
 |  | 
 | const VideoStreamEncoderObserver::AdaptationSettings kScalingEnabled(true, | 
 |                                                                      true); | 
 | const VideoStreamEncoderObserver::AdaptationSettings kFramerateScalingDisabled( | 
 |     true, | 
 |     false); | 
 | const VideoStreamEncoderObserver::AdaptationSettings kResolutionScalingDisabled( | 
 |     false, | 
 |     true); | 
 | const VideoStreamEncoderObserver::AdaptationSettings kScalingDisabled; | 
 | }  // namespace | 
 |  | 
 | class SendStatisticsProxyTest : public ::testing::Test { | 
 |  public: | 
 |   SendStatisticsProxyTest() : SendStatisticsProxyTest("") {} | 
 |   explicit SendStatisticsProxyTest(const std::string& field_trials) | 
 |       : override_field_trials_(field_trials), | 
 |         fake_clock_(1234), | 
 |         config_(GetTestConfig()) {} | 
 |   virtual ~SendStatisticsProxyTest() {} | 
 |  | 
 |  protected: | 
 |   virtual void SetUp() { | 
 |     metrics::Reset(); | 
 |     statistics_proxy_.reset( | 
 |         new SendStatisticsProxy(&fake_clock_, GetTestConfig(), | 
 |                                 VideoEncoderConfig::ContentType::kRealtimeVideo, | 
 |                                 override_field_trials_)); | 
 |     expected_ = VideoSendStream::Stats(); | 
 |     for (const auto& ssrc : config_.rtp.ssrcs) { | 
 |       expected_.substreams[ssrc].type = | 
 |           VideoSendStream::StreamStats::StreamType::kMedia; | 
 |     } | 
 |     for (size_t i = 0; i < config_.rtp.rtx.ssrcs.size(); ++i) { | 
 |       uint32_t ssrc = config_.rtp.rtx.ssrcs[i]; | 
 |       expected_.substreams[ssrc].type = | 
 |           VideoSendStream::StreamStats::StreamType::kRtx; | 
 |       expected_.substreams[ssrc].referenced_media_ssrc = config_.rtp.ssrcs[i]; | 
 |     } | 
 |   } | 
 |  | 
 |   VideoSendStream::Config GetTestConfig() { | 
 |     VideoSendStream::Config config(nullptr); | 
 |     config.rtp.ssrcs.push_back(kFirstSsrc); | 
 |     config.rtp.ssrcs.push_back(kSecondSsrc); | 
 |     config.rtp.rtx.ssrcs.push_back(kFirstRtxSsrc); | 
 |     config.rtp.rtx.ssrcs.push_back(kSecondRtxSsrc); | 
 |     config.rtp.ulpfec.red_payload_type = 17; | 
 |     return config; | 
 |   } | 
 |  | 
 |   VideoSendStream::Config GetTestConfigWithFlexFec() { | 
 |     VideoSendStream::Config config(nullptr); | 
 |     config.rtp.ssrcs.push_back(kFirstSsrc); | 
 |     config.rtp.ssrcs.push_back(kSecondSsrc); | 
 |     config.rtp.rtx.ssrcs.push_back(kFirstRtxSsrc); | 
 |     config.rtp.rtx.ssrcs.push_back(kSecondRtxSsrc); | 
 |     config.rtp.flexfec.payload_type = 50; | 
 |     config.rtp.flexfec.ssrc = kFlexFecSsrc; | 
 |     config.rtp.flexfec.protected_media_ssrcs = {kFirstSsrc}; | 
 |     return config; | 
 |   } | 
 |  | 
 |   VideoSendStream::StreamStats GetStreamStats(uint32_t ssrc) { | 
 |     VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |     std::map<uint32_t, VideoSendStream::StreamStats>::iterator it = | 
 |         stats.substreams.find(ssrc); | 
 |     EXPECT_NE(it, stats.substreams.end()); | 
 |     return it->second; | 
 |   } | 
 |  | 
 |   void UpdateDataCounters(uint32_t ssrc) { | 
 |     StreamDataCountersCallback* proxy = | 
 |         static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |     StreamDataCounters counters; | 
 |     proxy->DataCountersUpdated(counters, ssrc); | 
 |   } | 
 |  | 
 |   void ExpectEqual(VideoSendStream::Stats one, VideoSendStream::Stats other) { | 
 |     EXPECT_EQ(one.frames, other.frames); | 
 |     EXPECT_EQ(one.input_frame_rate, other.input_frame_rate); | 
 |     EXPECT_EQ(one.encode_frame_rate, other.encode_frame_rate); | 
 |     EXPECT_EQ(one.media_bitrate_bps, other.media_bitrate_bps); | 
 |     EXPECT_EQ(one.suspended, other.suspended); | 
 |  | 
 |     EXPECT_EQ(one.substreams.size(), other.substreams.size()); | 
 |     for (std::map<uint32_t, VideoSendStream::StreamStats>::const_iterator it = | 
 |              one.substreams.begin(); | 
 |          it != one.substreams.end(); ++it) { | 
 |       std::map<uint32_t, VideoSendStream::StreamStats>::const_iterator | 
 |           corresponding_it = other.substreams.find(it->first); | 
 |       ASSERT_TRUE(corresponding_it != other.substreams.end()); | 
 |       const VideoSendStream::StreamStats& a = it->second; | 
 |       const VideoSendStream::StreamStats& b = corresponding_it->second; | 
 |  | 
 |       EXPECT_EQ(a.type, b.type); | 
 |       EXPECT_EQ(a.frame_counts.key_frames, b.frame_counts.key_frames); | 
 |       EXPECT_EQ(a.frame_counts.delta_frames, b.frame_counts.delta_frames); | 
 |       EXPECT_EQ(a.total_bitrate_bps, b.total_bitrate_bps); | 
 |       EXPECT_EQ(a.avg_delay_ms, b.avg_delay_ms); | 
 |       EXPECT_EQ(a.max_delay_ms, b.max_delay_ms); | 
 |  | 
 |       EXPECT_EQ(a.rtp_stats.transmitted.payload_bytes, | 
 |                 b.rtp_stats.transmitted.payload_bytes); | 
 |       EXPECT_EQ(a.rtp_stats.transmitted.header_bytes, | 
 |                 b.rtp_stats.transmitted.header_bytes); | 
 |       EXPECT_EQ(a.rtp_stats.transmitted.padding_bytes, | 
 |                 b.rtp_stats.transmitted.padding_bytes); | 
 |       EXPECT_EQ(a.rtp_stats.transmitted.packets, | 
 |                 b.rtp_stats.transmitted.packets); | 
 |       EXPECT_EQ(a.rtp_stats.retransmitted.packets, | 
 |                 b.rtp_stats.retransmitted.packets); | 
 |       EXPECT_EQ(a.rtp_stats.fec.packets, b.rtp_stats.fec.packets); | 
 |  | 
 |       EXPECT_EQ(a.report_block_data.has_value(), | 
 |                 b.report_block_data.has_value()); | 
 |       if (a.report_block_data.has_value()) { | 
 |         const RTCPReportBlock& a_rtcp_stats = | 
 |             a.report_block_data->report_block(); | 
 |         const RTCPReportBlock& b_rtcp_stats = | 
 |             b.report_block_data->report_block(); | 
 |         EXPECT_EQ(a_rtcp_stats.fraction_lost, b_rtcp_stats.fraction_lost); | 
 |         EXPECT_EQ(a_rtcp_stats.packets_lost, b_rtcp_stats.packets_lost); | 
 |         EXPECT_EQ(a_rtcp_stats.extended_highest_sequence_number, | 
 |                   b_rtcp_stats.extended_highest_sequence_number); | 
 |         EXPECT_EQ(a_rtcp_stats.jitter, b_rtcp_stats.jitter); | 
 |       } | 
 |     } | 
 |   } | 
 |  | 
 |   test::ScopedKeyValueConfig override_field_trials_; | 
 |   SimulatedClock fake_clock_; | 
 |   std::unique_ptr<SendStatisticsProxy> statistics_proxy_; | 
 |   VideoSendStream::Config config_; | 
 |   VideoSendStream::Stats expected_; | 
 | }; | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ReportBlockDataObserver) { | 
 |   ReportBlockDataObserver* callback = statistics_proxy_.get(); | 
 |   for (uint32_t ssrc : config_.rtp.ssrcs) { | 
 |     // Add statistics with some arbitrary, but unique, numbers. | 
 |     uint32_t offset = ssrc * 4; | 
 |     RTCPReportBlock report_block; | 
 |     report_block.source_ssrc = ssrc; | 
 |     report_block.packets_lost = offset; | 
 |     report_block.extended_highest_sequence_number = offset + 1; | 
 |     report_block.fraction_lost = offset + 2; | 
 |     report_block.jitter = offset + 3; | 
 |     ReportBlockData data; | 
 |     data.SetReportBlock(report_block, 0); | 
 |     expected_.substreams[ssrc].report_block_data = data; | 
 |  | 
 |     callback->OnReportBlockDataUpdated(data); | 
 |   } | 
 |   for (uint32_t ssrc : config_.rtp.rtx.ssrcs) { | 
 |     // Add statistics with some arbitrary, but unique, numbers. | 
 |     uint32_t offset = ssrc * 4; | 
 |     RTCPReportBlock report_block; | 
 |     report_block.source_ssrc = ssrc; | 
 |     report_block.packets_lost = offset; | 
 |     report_block.extended_highest_sequence_number = offset + 1; | 
 |     report_block.fraction_lost = offset + 2; | 
 |     report_block.jitter = offset + 3; | 
 |     ReportBlockData data; | 
 |     data.SetReportBlock(report_block, 0); | 
 |     expected_.substreams[ssrc].report_block_data = data; | 
 |  | 
 |     callback->OnReportBlockDataUpdated(data); | 
 |   } | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   ExpectEqual(expected_, stats); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, Suspended) { | 
 |   // Verify that the value is false by default. | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().suspended); | 
 |  | 
 |   // Verify that we can set it to true. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().suspended); | 
 |  | 
 |   // Verify that we can set it back to false again. | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().suspended); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, FrameCounts) { | 
 |   FrameCountObserver* observer = statistics_proxy_.get(); | 
 |   for (const auto& ssrc : config_.rtp.ssrcs) { | 
 |     // Add statistics with some arbitrary, but unique, numbers. | 
 |     VideoSendStream::StreamStats& stats = expected_.substreams[ssrc]; | 
 |     uint32_t offset = ssrc * sizeof(VideoSendStream::StreamStats); | 
 |     FrameCounts frame_counts; | 
 |     frame_counts.key_frames = offset; | 
 |     frame_counts.delta_frames = offset + 1; | 
 |     stats.frame_counts = frame_counts; | 
 |     observer->FrameCountUpdated(frame_counts, ssrc); | 
 |   } | 
 |   for (const auto& ssrc : config_.rtp.rtx.ssrcs) { | 
 |     // Add statistics with some arbitrary, but unique, numbers. | 
 |     VideoSendStream::StreamStats& stats = expected_.substreams[ssrc]; | 
 |     uint32_t offset = ssrc * sizeof(VideoSendStream::StreamStats); | 
 |     FrameCounts frame_counts; | 
 |     frame_counts.key_frames = offset; | 
 |     frame_counts.delta_frames = offset + 1; | 
 |     stats.frame_counts = frame_counts; | 
 |     observer->FrameCountUpdated(frame_counts, ssrc); | 
 |   } | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   ExpectEqual(expected_, stats); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, DataCounters) { | 
 |   StreamDataCountersCallback* callback = statistics_proxy_.get(); | 
 |   for (const auto& ssrc : config_.rtp.ssrcs) { | 
 |     StreamDataCounters& counters = expected_.substreams[ssrc].rtp_stats; | 
 |     // Add statistics with some arbitrary, but unique, numbers. | 
 |     size_t offset = ssrc * sizeof(StreamDataCounters); | 
 |     uint32_t offset_uint32 = static_cast<uint32_t>(offset); | 
 |     counters.transmitted.payload_bytes = offset; | 
 |     counters.transmitted.header_bytes = offset + 1; | 
 |     counters.fec.packets = offset_uint32 + 2; | 
 |     counters.transmitted.padding_bytes = offset + 3; | 
 |     counters.retransmitted.packets = offset_uint32 + 4; | 
 |     counters.transmitted.packets = offset_uint32 + 5; | 
 |     callback->DataCountersUpdated(counters, ssrc); | 
 |   } | 
 |   for (const auto& ssrc : config_.rtp.rtx.ssrcs) { | 
 |     StreamDataCounters& counters = expected_.substreams[ssrc].rtp_stats; | 
 |     // Add statistics with some arbitrary, but unique, numbers. | 
 |     size_t offset = ssrc * sizeof(StreamDataCounters); | 
 |     uint32_t offset_uint32 = static_cast<uint32_t>(offset); | 
 |     counters.transmitted.payload_bytes = offset; | 
 |     counters.transmitted.header_bytes = offset + 1; | 
 |     counters.fec.packets = offset_uint32 + 2; | 
 |     counters.transmitted.padding_bytes = offset + 3; | 
 |     counters.retransmitted.packets = offset_uint32 + 4; | 
 |     counters.transmitted.packets = offset_uint32 + 5; | 
 |     callback->DataCountersUpdated(counters, ssrc); | 
 |   } | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   ExpectEqual(expected_, stats); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, Bitrate) { | 
 |   BitrateStatisticsObserver* observer = statistics_proxy_.get(); | 
 |   for (const auto& ssrc : config_.rtp.ssrcs) { | 
 |     // Use ssrc as bitrate_bps to get a unique value for each stream. | 
 |     uint32_t total = ssrc; | 
 |     uint32_t retransmit = ssrc + 1; | 
 |     observer->Notify(total, retransmit, ssrc); | 
 |     expected_.substreams[ssrc].total_bitrate_bps = total; | 
 |     expected_.substreams[ssrc].retransmit_bitrate_bps = retransmit; | 
 |   } | 
 |   for (const auto& ssrc : config_.rtp.rtx.ssrcs) { | 
 |     // Use ssrc as bitrate_bps to get a unique value for each stream. | 
 |     uint32_t total = ssrc; | 
 |     uint32_t retransmit = ssrc + 1; | 
 |     observer->Notify(total, retransmit, ssrc); | 
 |     expected_.substreams[ssrc].total_bitrate_bps = total; | 
 |     expected_.substreams[ssrc].retransmit_bitrate_bps = retransmit; | 
 |   } | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   ExpectEqual(expected_, stats); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, SendSideDelay) { | 
 |   SendSideDelayObserver* observer = statistics_proxy_.get(); | 
 |   for (const auto& ssrc : config_.rtp.ssrcs) { | 
 |     // Use ssrc as avg_delay_ms and max_delay_ms to get a unique value for each | 
 |     // stream. | 
 |     int avg_delay_ms = ssrc; | 
 |     int max_delay_ms = ssrc + 1; | 
 |     observer->SendSideDelayUpdated(avg_delay_ms, max_delay_ms, ssrc); | 
 |     expected_.substreams[ssrc].avg_delay_ms = avg_delay_ms; | 
 |     expected_.substreams[ssrc].max_delay_ms = max_delay_ms; | 
 |   } | 
 |   for (const auto& ssrc : config_.rtp.rtx.ssrcs) { | 
 |     // Use ssrc as avg_delay_ms and max_delay_ms to get a unique value for each | 
 |     // stream. | 
 |     int avg_delay_ms = ssrc; | 
 |     int max_delay_ms = ssrc + 1; | 
 |     observer->SendSideDelayUpdated(avg_delay_ms, max_delay_ms, ssrc); | 
 |     expected_.substreams[ssrc].avg_delay_ms = avg_delay_ms; | 
 |     expected_.substreams[ssrc].max_delay_ms = max_delay_ms; | 
 |   } | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   ExpectEqual(expected_, stats); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, OnEncodedFrameTimeMeasured) { | 
 |   const int kEncodeTimeMs = 11; | 
 |   int encode_usage_percent = 80; | 
 |   statistics_proxy_->OnEncodedFrameTimeMeasured(kEncodeTimeMs, | 
 |                                                 encode_usage_percent); | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodeTimeMs, stats.avg_encode_time_ms); | 
 |   EXPECT_EQ(encode_usage_percent, stats.encode_usage_percent); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, TotalEncodeTimeIncreasesPerFrameMeasured) { | 
 |   const int kEncodeUsagePercent = 0;  // Don't care for this test. | 
 |   EXPECT_EQ(0u, statistics_proxy_->GetStats().total_encode_time_ms); | 
 |   statistics_proxy_->OnEncodedFrameTimeMeasured(10, kEncodeUsagePercent); | 
 |   EXPECT_EQ(10u, statistics_proxy_->GetStats().total_encode_time_ms); | 
 |   statistics_proxy_->OnEncodedFrameTimeMeasured(20, kEncodeUsagePercent); | 
 |   EXPECT_EQ(30u, statistics_proxy_->GetStats().total_encode_time_ms); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, OnSendEncodedImageIncreasesFramesEncoded) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   EXPECT_EQ(0u, statistics_proxy_->GetStats().frames_encoded); | 
 |   for (uint32_t i = 1; i <= 3; ++i) { | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     EXPECT_EQ(i, statistics_proxy_->GetStats().frames_encoded); | 
 |   } | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, OnSendEncodedImageIncreasesQpSum) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   auto ssrc = config_.rtp.ssrcs[0]; | 
 |   EXPECT_EQ(absl::nullopt, | 
 |             statistics_proxy_->GetStats().substreams[ssrc].qp_sum); | 
 |   encoded_image.qp_ = 3; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   EXPECT_EQ(3u, statistics_proxy_->GetStats().substreams[ssrc].qp_sum); | 
 |   encoded_image.qp_ = 127; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   EXPECT_EQ(130u, statistics_proxy_->GetStats().substreams[ssrc].qp_sum); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, OnSendEncodedImageWithoutQpQpSumWontExist) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   auto ssrc = config_.rtp.ssrcs[0]; | 
 |   encoded_image.qp_ = -1; | 
 |   EXPECT_EQ(absl::nullopt, | 
 |             statistics_proxy_->GetStats().substreams[ssrc].qp_sum); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   EXPECT_EQ(absl::nullopt, | 
 |             statistics_proxy_->GetStats().substreams[ssrc].qp_sum); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        OnSendEncodedImageSetsScalabilityModeOfCurrentLayer) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   ScalabilityMode layer0_mode = ScalabilityMode::kL1T1; | 
 |   ScalabilityMode layer1_mode = ScalabilityMode::kL1T3; | 
 |   auto ssrc0 = config_.rtp.ssrcs[0]; | 
 |   auto ssrc1 = config_.rtp.ssrcs[1]; | 
 |   EXPECT_EQ(absl::nullopt, | 
 |             statistics_proxy_->GetStats().substreams[ssrc0].scalability_mode); | 
 |   EXPECT_EQ(absl::nullopt, | 
 |             statistics_proxy_->GetStats().substreams[ssrc1].scalability_mode); | 
 |   encoded_image.SetSimulcastIndex(0); | 
 |   codec_info.scalability_mode = layer0_mode; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   EXPECT_THAT(statistics_proxy_->GetStats().substreams[ssrc0].scalability_mode, | 
 |               layer0_mode); | 
 |   EXPECT_EQ(absl::nullopt, | 
 |             statistics_proxy_->GetStats().substreams[ssrc1].scalability_mode); | 
 |   encoded_image.SetSimulcastIndex(1); | 
 |   codec_info.scalability_mode = layer1_mode; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   EXPECT_THAT(statistics_proxy_->GetStats().substreams[ssrc0].scalability_mode, | 
 |               layer0_mode); | 
 |   EXPECT_THAT(statistics_proxy_->GetStats().substreams[ssrc1].scalability_mode, | 
 |               layer1_mode); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, TotalEncodedBytesTargetFirstFrame) { | 
 |   const uint32_t kTargetBytesPerSecond = 100000; | 
 |   statistics_proxy_->OnSetEncoderTargetRate(kTargetBytesPerSecond * 8); | 
 |   EXPECT_EQ(0u, statistics_proxy_->GetStats().total_encoded_bytes_target); | 
 |  | 
 |   EncodedImage encoded_image; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   // On the first frame we don't know the frame rate yet, calculation yields | 
 |   // zero. Our estimate assumes at least 1 FPS, so we expect the frame size to | 
 |   // increment by a full `kTargetBytesPerSecond`. | 
 |   EXPECT_EQ(kTargetBytesPerSecond, | 
 |             statistics_proxy_->GetStats().total_encoded_bytes_target); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        TotalEncodedBytesTargetIncrementsBasedOnFrameRate) { | 
 |   const uint32_t kTargetBytesPerSecond = 100000; | 
 |   const int kInterframeDelayMs = 100; | 
 |  | 
 |   // SendStatisticsProxy uses a RateTracker internally. SendStatisticsProxy uses | 
 |   // `fake_clock_` for testing, but the RateTracker relies on a global clock. | 
 |   // This test relies on rtc::ScopedFakeClock to synchronize these two clocks. | 
 |   // TODO(https://crbug.com/webrtc/10640): When the RateTracker uses a Clock | 
 |   // this test can stop relying on rtc::ScopedFakeClock. | 
 |   rtc::ScopedFakeClock fake_global_clock; | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |  | 
 |   statistics_proxy_->OnSetEncoderTargetRate(kTargetBytesPerSecond * 8); | 
 |   EncodedImage encoded_image; | 
 |  | 
 |   // First frame | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   uint64_t first_total_encoded_bytes_target = | 
 |       statistics_proxy_->GetStats().total_encoded_bytes_target; | 
 |   // Second frame | 
 |   fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                              90 * kInterframeDelayMs); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |  | 
 |   auto stats = statistics_proxy_->GetStats(); | 
 |   // By the time the second frame arrives, one frame has previously arrived | 
 |   // during a `kInterframeDelayMs` interval. The estimated encode frame rate at | 
 |   // the second frame's arrival should be 10 FPS. | 
 |   uint64_t delta_encoded_bytes_target = | 
 |       stats.total_encoded_bytes_target - first_total_encoded_bytes_target; | 
 |   EXPECT_EQ(kTargetBytesPerSecond / 10, delta_encoded_bytes_target); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, EncodeFrameRateInSubStream) { | 
 |   const int kInterframeDelayMs = 100; | 
 |   const auto ssrc = config_.rtp.ssrcs[0]; | 
 |   rtc::ScopedFakeClock fake_global_clock; | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |  | 
 |   // First frame | 
 |   EncodedImage encoded_image; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   // Second frame | 
 |   encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                              90 * kInterframeDelayMs); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |  | 
 |   auto stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(stats.substreams[ssrc].encode_frame_rate, 10); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, EncodeFrameRateInSubStreamsVp8Simulcast) { | 
 |   const int kInterframeDelayMs = 100; | 
 |   rtc::ScopedFakeClock fake_global_clock; | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP8; | 
 |  | 
 |   for (int i = 0; i < 10; ++i) { | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                90 * kInterframeDelayMs); | 
 |     encoded_image.SetSimulcastIndex(0); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     encoded_image.SetSimulcastIndex(1); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |     fake_global_clock.SetTime( | 
 |         Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   } | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(2u, stats.substreams.size()); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[0]].encode_frame_rate, 10); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[1]].encode_frame_rate, 10); | 
 |  | 
 |   // Stop encoding second stream, expect framerate to be zero. | 
 |   for (int i = 0; i < 10; ++i) { | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                90 * kInterframeDelayMs); | 
 |     encoded_image.SetSimulcastIndex(0); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |     fake_global_clock.SetTime( | 
 |         Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   } | 
 |  | 
 |   stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(2u, stats.substreams.size()); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[0]].encode_frame_rate, 10); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[1]].encode_frame_rate, 0); | 
 |  | 
 |   // Start encoding second stream. | 
 |   for (int i = 0; i < 10; ++i) { | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                90 * kInterframeDelayMs); | 
 |     encoded_image.SetSimulcastIndex(0); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     encoded_image.SetSimulcastIndex(1); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |     fake_global_clock.SetTime( | 
 |         Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   } | 
 |  | 
 |   stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(2u, stats.substreams.size()); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[0]].encode_frame_rate, 10); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[1]].encode_frame_rate, 10); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, EncodeFrameRateInSubStreamsVp9Svc) { | 
 |   const int kInterframeDelayMs = 100; | 
 |   rtc::ScopedFakeClock fake_global_clock; | 
 |   fake_global_clock.SetTime( | 
 |       Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP9; | 
 |  | 
 |   for (int i = 0; i < 10; ++i) { | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                90 * kInterframeDelayMs); | 
 |     encoded_image.SetSpatialIndex(0); | 
 |     codec_info.end_of_picture = false; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     encoded_image.SetSpatialIndex(1); | 
 |     codec_info.end_of_picture = true; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs); | 
 |     fake_global_clock.SetTime( | 
 |         Timestamp::Millis(fake_clock_.TimeInMilliseconds())); | 
 |   } | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(1u, stats.substreams.size()); | 
 |   EXPECT_EQ(stats.substreams[config_.rtp.ssrcs[0]].encode_frame_rate, 10); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetCpuAdaptationStats) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   cpu_counts.fps_adaptations = 1; | 
 |   cpu_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   cpu_counts.fps_adaptations = 0; | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   cpu_counts.fps_adaptations = 1; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kResolutionScalingDisabled, | 
 |                                               kResolutionScalingDisabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetQualityAdaptationStats) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   quality_counts.fps_adaptations = 1; | 
 |   quality_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   quality_counts.fps_adaptations = 0; | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   quality_counts.fps_adaptations = 1; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kResolutionScalingDisabled, | 
 |                                               kResolutionScalingDisabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsCpuAdaptChanges) { | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(1, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   cpu_counts.resolution_adaptations = 2; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsQualityAdaptChanges) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |  | 
 |   quality_counts.fps_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_EQ(1, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |  | 
 |   quality_counts.fps_adaptations = 0; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, TestAdaptationStatisticsMasking) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   quality_counts.fps_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   cpu_counts.fps_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   // We have 1 fps and resolution reduction for both cpu and quality | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   // Disable quality scaling. Expect quality scaling not limited. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, | 
 |                                               kScalingDisabled); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   // Disable framerate scaling. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kFramerateScalingDisabled, | 
 |                                               kFramerateScalingDisabled); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   // Disable resolution scaling. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kResolutionScalingDisabled, | 
 |                                               kResolutionScalingDisabled); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 |  | 
 |   // Enable all | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_framerate); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().cpu_limited_resolution); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_quality_adapt_changes); | 
 |   EXPECT_EQ(2, statistics_proxy_->GetStats().number_of_cpu_adapt_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesNotReported_AdaptationNotEnabled) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Min runtime has passed. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesNotReported_MinRuntimeNotPassed) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Min runtime has not passed. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000 - 1); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ZeroAdaptChangesReported) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Min runtime has passed. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Cpu", 0)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, CpuAdaptChangesReported) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Adapt changes: 1, elapsed time: 10 sec => 6 per minute. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Cpu", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ExcludesInitialQualityAdaptDownChange) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Adapt changes: 1 (1 initial) = 0, elapsed time: 10 sec => 0 per minute. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ExcludesInitialQualityAdaptDownChanges) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Adapt changes: 3 (2 initial) = 1, elapsed time: 10 sec => 6 per minute. | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   quality_counts.resolution_adaptations = 2; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   quality_counts.resolution_adaptations = 3; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, InitialQualityAdaptChangesNotExcludedOnError) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Adapt changes: 1 (2 initial) = 1, elapsed time: 10 sec => 6 per minute. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ExcludesInitialQualityAdaptDownAndUpChanges) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   // Enable adaptation. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->ClearAdaptationStats(); | 
 |   // Adapt changes: 8 (4 initial) = 4, elapsed time: 10 sec => 24 per minute. | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   quality_counts.resolution_adaptations = 2; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnInitialQualityResolutionAdaptDown(); | 
 |   quality_counts.resolution_adaptations = 3; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   quality_counts.fps_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   quality_counts.fps_adaptations = 0; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   quality_counts.resolution_adaptations = 2;  // Initial resolution up. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   quality_counts.resolution_adaptations = 1;  // Initial resolution up. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   quality_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 24)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesStatsExcludesDisabledTime) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Disable quality adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, | 
 |                                               kScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |  | 
 |   // Enable quality adaptation. | 
 |   // Adapt changes: 2, elapsed time: 20 sec. | 
 |   quality_counts.fps_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kResolutionScalingDisabled, | 
 |                                               kResolutionScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(5000); | 
 |   statistics_proxy_->UpdateAdaptationSettings(kResolutionScalingDisabled, | 
 |                                               kResolutionScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(9000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(6000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   // Disable quality adaptation. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(30000); | 
 |  | 
 |   // Enable quality adaptation. | 
 |   // Adapt changes: 1, elapsed time: 10 sec. | 
 |   quality_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kFramerateScalingDisabled, | 
 |                                               kFramerateScalingDisabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |  | 
 |   // Disable quality adaptation. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(5000); | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(20000); | 
 |  | 
 |   // Adapt changes: 3, elapsed time: 30 sec => 6 per minute. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        AdaptChangesNotReported_ScalingNotEnabledVideoResumed) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Suspend and resume video. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |   fake_clock_.AdvanceTimeMilliseconds(5000); | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |  | 
 |   // Min runtime has passed but scaling not enabled. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, QualityAdaptChangesStatsExcludesSuspendedTime) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Enable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   // Adapt changes: 2, elapsed time: 20 sec. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(20000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   // Suspend and resume video. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |   fake_clock_.AdvanceTimeMilliseconds(30000); | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |  | 
 |   // Adapt changes: 1, elapsed time: 10 sec. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |  | 
 |   // Adapt changes: 3, elapsed time: 30 sec => 6 per minute. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, CpuAdaptChangesStatsExcludesSuspendedTime) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Video not suspended. | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |   fake_clock_.AdvanceTimeMilliseconds(30000); | 
 |  | 
 |   // Enable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   // Adapt changes: 1, elapsed time: 20 sec. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   // Video not suspended, stats time already started. | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |  | 
 |   // Disable adaptation. | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(30000); | 
 |  | 
 |   // Suspend and resume video, stats time not started when scaling not enabled. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |   fake_clock_.AdvanceTimeMilliseconds(30000); | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |   fake_clock_.AdvanceTimeMilliseconds(30000); | 
 |  | 
 |   // Enable adaptation. | 
 |   // Adapt changes: 1, elapsed time: 10 sec. | 
 |   cpu_counts.fps_adaptations = 0; | 
 |   cpu_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   // Adapt changes: 2, elapsed time: 30 sec => 4 per minute. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Cpu", 4)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesStatsNotStartedIfVideoSuspended) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Video suspended. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |  | 
 |   // Enable adaptation, stats time not started when suspended. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |  | 
 |   // Resume video, stats time started. | 
 |   // Adapt changes: 1, elapsed time: 10 sec. | 
 |   statistics_proxy_->OnSuspendChange(false); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   // Adapt changes: 1, elapsed time: 10 sec => 6 per minute. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Cpu", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesStatsRestartsOnFirstSentPacket) { | 
 |   // Send first packet, adaptation enabled. | 
 |   // Elapsed time before first packet is sent should be excluded. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Adapt changes: 1, elapsed time: 10 sec. | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Adapt changes: 1, elapsed time: 10 sec => 6 per minute. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Quality", 6)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesStatsStartedAfterFirstSentPacket) { | 
 |   // Enable and disable adaptation. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(60000); | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |  | 
 |   // Send first packet, scaling disabled. | 
 |   // Elapsed time before first packet is sent should be excluded. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   fake_clock_.AdvanceTimeMilliseconds(60000); | 
 |  | 
 |   // Enable adaptation. | 
 |   cpu_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kFramerateScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Adapt changes: 1, elapsed time: 20 sec. | 
 |   fake_clock_.AdvanceTimeMilliseconds(10000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   // Adapt changes: 1, elapsed time: 20 sec => 3 per minute. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Cpu", 3)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, AdaptChangesReportedAfterContentSwitch) { | 
 |   // First RTP packet sent, cpu adaptation enabled. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, | 
 |                                               kScalingDisabled); | 
 |  | 
 |   // Adapt changes: 2, elapsed time: 15 sec => 8 per minute. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(6000); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(9000); | 
 |  | 
 |   // Switch content type, real-time stats should be updated. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kScreen; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {}); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.AdaptChangesPerMinute.Cpu", 8)); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.AdaptChangesPerMinute.Quality")); | 
 |  | 
 |   // First RTP packet sent, scaling enabled. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, | 
 |                                               kScalingDisabled); | 
 |  | 
 |   // Adapt changes: 4, elapsed time: 120 sec => 2 per minute. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(120000); | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples( | 
 |                        "WebRTC.Video.Screenshare.AdaptChangesPerMinute.Cpu")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents( | 
 |              "WebRTC.Video.Screenshare.AdaptChangesPerMinute.Cpu", 2)); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples( | 
 |              "WebRTC.Video.Screenshare.AdaptChangesPerMinute.Quality")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationReasonIsCpuWhenCpuIsResolutionLimited) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   EXPECT_EQ(QualityLimitationReason::kCpu, | 
 |             statistics_proxy_->GetStats().quality_limitation_reason); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationReasonIsCpuWhenCpuIsFramerateLimited) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   cpu_counts.fps_adaptations = 1; | 
 |  | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   EXPECT_EQ(QualityLimitationReason::kCpu, | 
 |             statistics_proxy_->GetStats().quality_limitation_reason); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationReasonIsBandwidthWhenQualityIsResolutionLimited) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   quality_counts.resolution_adaptations = 1; | 
 |  | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   EXPECT_EQ(QualityLimitationReason::kBandwidth, | 
 |             statistics_proxy_->GetStats().quality_limitation_reason); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationReasonIsBandwidthWhenQualityIsFramerateLimited) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   quality_counts.fps_adaptations = 1; | 
 |  | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   EXPECT_EQ(QualityLimitationReason::kBandwidth, | 
 |             statistics_proxy_->GetStats().quality_limitation_reason); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationReasonIsBandwidthWhenBothCpuAndQualityIsLimited) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |  | 
 |   // Even if the last adaptation reason is kCpu, if the counters indicate being | 
 |   // both CPU and quality (=bandwidth) limited, kBandwidth takes precedence. | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   EXPECT_EQ(QualityLimitationReason::kBandwidth, | 
 |             statistics_proxy_->GetStats().quality_limitation_reason); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, QualityLimitationReasonIsNoneWhenNotLimited) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   // Observe a limitation due to CPU. This makes sure the test doesn't pass | 
 |   // due to "none" being the default value. | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   // Go back to not being limited. | 
 |   cpu_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   EXPECT_EQ(QualityLimitationReason::kNone, | 
 |             statistics_proxy_->GetStats().quality_limitation_reason); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, QualityLimitationDurationIncreasesWithTime) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |  | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   // Not limited for 3000 ms | 
 |   fake_clock_.AdvanceTimeMilliseconds(3000); | 
 |   // CPU limited for 2000 ms | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(2000); | 
 |   // Bandwidth limited for 1000 ms | 
 |   cpu_counts.resolution_adaptations = 0; | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(1000); | 
 |   // CPU limited for another 2000 ms | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   quality_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |   fake_clock_.AdvanceTimeMilliseconds(2000); | 
 |  | 
 |   auto quality_limitation_durations_ms = | 
 |       statistics_proxy_->GetStats().quality_limitation_durations_ms; | 
 |  | 
 |   EXPECT_EQ(3000, | 
 |             quality_limitation_durations_ms[QualityLimitationReason::kNone]); | 
 |   EXPECT_EQ(4000, | 
 |             quality_limitation_durations_ms[QualityLimitationReason::kCpu]); | 
 |   EXPECT_EQ( | 
 |       1000, | 
 |       quality_limitation_durations_ms[QualityLimitationReason::kBandwidth]); | 
 |   EXPECT_EQ(0, | 
 |             quality_limitation_durations_ms[QualityLimitationReason::kOther]); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, QualityLimitationResolutionChangesDefaultZero) { | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionChangesNotChangesWithOnlyDefaultAllocation) { | 
 |   VideoCodec codec; | 
 |   VideoBitrateAllocation allocation; | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionChangesDoesNotIncreaseOnFirstAllocation) { | 
 |   VideoCodec codec; | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.simulcastStream[1].active = true; | 
 |   codec.simulcastStream[2].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   allocation.SetBitrate(0, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionChangesWhenNewLayerGetsBandwidth) { | 
 |   VideoCodec codec; | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.simulcastStream[1].active = true; | 
 |   codec.simulcastStream[2].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   allocation.SetBitrate(0, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   allocation.SetBitrate(1, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       1u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionDoesNotChangeWhenLayerSame) { | 
 |   VideoCodec codec; | 
 |   codec.simulcastStream[0].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   allocation.SetBitrate(0, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   // Layer 0 got more bandwidth, but still only one layer on | 
 |   allocation.SetBitrate(0, 0, 200); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionChangesWithTogglingLayers) { | 
 |   VideoCodec codec; | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.simulcastStream[1].active = true; | 
 |   codec.simulcastStream[2].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   allocation.SetBitrate(0, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |   allocation.SetBitrate(1, 0, 300); | 
 |   allocation.SetBitrate(2, 0, 500); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       1u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |   // Layer 2 off | 
 |   allocation.SetBitrate(2, 0, 0); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       2u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |   // Layer 2 back on | 
 |   allocation.SetBitrate(2, 0, 500); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       3u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |   allocation.SetBitrate(0, 0, 0); | 
 |   allocation.SetBitrate(1, 0, 0); | 
 |   allocation.SetBitrate(2, 0, 0); | 
 |   // All layers off | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       4u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionDoesNotUpdateOnCodecSimulcastStreamChanges) { | 
 |   VideoCodec codec; | 
 |   // 3 layers | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.simulcastStream[1].active = true; | 
 |   codec.simulcastStream[2].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   allocation.SetBitrate(0, 0, 500); | 
 |   allocation.SetBitrate(1, 0, 500); | 
 |   allocation.SetBitrate(2, 0, 500); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |  | 
 |   // Down to one layer now, triggered by a config change | 
 |   codec.numberOfSimulcastStreams = 1; | 
 |   codec.simulcastStream[1].active = false; | 
 |   codec.simulcastStream[2].active = false; | 
 |   allocation.SetBitrate(0, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |  | 
 |   // Up to 3 layers again. | 
 |   codec.numberOfSimulcastStreams = 3; | 
 |   codec.simulcastStream[1].active = true; | 
 |   codec.simulcastStream[2].active = true; | 
 |   allocation.SetBitrate(0, 0, 500); | 
 |   allocation.SetBitrate(1, 0, 500); | 
 |   allocation.SetBitrate(2, 0, 500); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationResolutionDoesNotUpdateForSpatialLayerChanges) { | 
 |   VideoCodec codec; | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.spatialLayers[0].active = true; | 
 |   codec.spatialLayers[1].active = true; | 
 |   codec.spatialLayers[2].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   allocation.SetBitrate(0, 0, 500); | 
 |   allocation.SetBitrate(1, 0, 500); | 
 |   allocation.SetBitrate(2, 0, 500); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |  | 
 |   // Down to one layer now, triggered by a config change | 
 |   codec.spatialLayers[1].active = false; | 
 |   codec.spatialLayers[2].active = false; | 
 |   allocation.SetBitrate(0, 0, 100); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 |  | 
 |   // Up to 3 layers again. | 
 |   codec.spatialLayers[1].active = true; | 
 |   codec.spatialLayers[2].active = true; | 
 |   allocation.SetBitrate(0, 0, 500); | 
 |   allocation.SetBitrate(1, 0, 500); | 
 |   allocation.SetBitrate(2, 0, 500); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_EQ( | 
 |       0u, statistics_proxy_->GetStats().quality_limitation_resolution_changes); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitationReasonsAreCorrectForContentType) { | 
 |   // Realtime case. | 
 |   // Configure two streams. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kRealtimeVideo; | 
 |   config.number_of_streams = 2; | 
 |   VideoStream stream1; | 
 |   stream1.width = kWidth / 2; | 
 |   stream1.height = kHeight / 2; | 
 |   VideoStream stream2; | 
 |   stream2.width = kWidth; | 
 |   stream2.height = kHeight; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {stream1, stream2}); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_EQ(statistics_proxy_->GetStats().quality_limitation_reason, | 
 |             QualityLimitationReason::kNone); | 
 |   // Bw disabled one layer. | 
 |   VideoCodec codec; | 
 |   codec.numberOfSimulcastStreams = 2; | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.simulcastStream[1].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   // Some positive bitrate only on the first stream. | 
 |   allocation.SetBitrate(0, 0, 10000); | 
 |   allocation.SetBitrate(1, 0, 0); | 
 |   allocation.set_bw_limited(true); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_EQ(statistics_proxy_->GetStats().quality_limitation_reason, | 
 |             QualityLimitationReason::kBandwidth); | 
 |   // Bw enabled all layers. | 
 |   allocation.SetBitrate(1, 0, 10000); | 
 |   allocation.set_bw_limited(false); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_EQ(statistics_proxy_->GetStats().quality_limitation_reason, | 
 |             QualityLimitationReason::kNone); | 
 |  | 
 |   // Screencast case | 
 |   // Configure two streams. | 
 |   config.content_type = VideoEncoderConfig::ContentType::kScreen; | 
 |   config.number_of_streams = 2; | 
 |   stream1.width = kWidth; | 
 |   stream1.height = kHeight; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {stream1, stream2}); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_EQ(statistics_proxy_->GetStats().quality_limitation_reason, | 
 |             QualityLimitationReason::kNone); | 
 |   // Bw disabled one layer. | 
 |   // Some positive bitrate only on the second stream. | 
 |   allocation.SetBitrate(0, 0, 10000); | 
 |   allocation.SetBitrate(1, 0, 0); | 
 |   allocation.set_bw_limited(true); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_framerate); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_EQ(statistics_proxy_->GetStats().quality_limitation_reason, | 
 |             QualityLimitationReason::kBandwidth); | 
 |   // Bw enabled all layers. | 
 |   allocation.SetBitrate(1, 0, 10000); | 
 |   allocation.set_bw_limited(false); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |   EXPECT_EQ(statistics_proxy_->GetStats().quality_limitation_reason, | 
 |             QualityLimitationReason::kNone); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, SwitchContentTypeUpdatesHistograms) { | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |  | 
 |   // No switch, stats should not be updated. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kRealtimeVideo; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {}); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.InputWidthInPixels")); | 
 |  | 
 |   // Switch to screenshare, real-time stats should be updated. | 
 |   config.content_type = VideoEncoderConfig::ContentType::kScreen; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {}); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.InputWidthInPixels")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, InputResolutionHistogramsAreUpdated) { | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.InputWidthInPixels")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.InputWidthInPixels", kWidth)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.InputHeightInPixels")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.InputHeightInPixels", kHeight)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, SentResolutionHistogramsAreUpdated) { | 
 |   const int64_t kMaxEncodedFrameWindowMs = 800; | 
 |   const int kFps = 5; | 
 |   const int kNumFramesPerWindow = kFps * kMaxEncodedFrameWindowMs / 1000; | 
 |   const int kMinSamples =  // Sample added when removed from EncodedFrameMap. | 
 |       SendStatisticsProxy::kMinRequiredMetricsSamples + kNumFramesPerWindow; | 
 |   EncodedImage encoded_image; | 
 |  | 
 |   // Not enough samples, stats should not be updated. | 
 |   for (int i = 0; i < kMinSamples - 1; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + 90 * 1000 / kFps); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |   SetUp();  // Reset stats proxy also causes histograms to be reported. | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.SentWidthInPixels")); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.SentHeightInPixels")); | 
 |  | 
 |   // Enough samples, max resolution per frame should be reported. | 
 |   encoded_image.SetTimestamp(0xffff0000);  // Will wrap. | 
 |   for (int i = 0; i < kMinSamples; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + 90 * 1000 / kFps); | 
 |     encoded_image._encodedWidth = kWidth; | 
 |     encoded_image._encodedHeight = kHeight; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |     encoded_image._encodedWidth = kWidth / 2; | 
 |     encoded_image._encodedHeight = kHeight / 2; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.SentWidthInPixels")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.SentWidthInPixels", kWidth)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.SentHeightInPixels")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.SentHeightInPixels", kHeight)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, InputFpsHistogramIsUpdated) { | 
 |   const int kFps = 20; | 
 |   const int kMinPeriodicSamples = 6; | 
 |   int frames = kMinPeriodicSamples * kFpsPeriodicIntervalMs * kFps / 1000; | 
 |   for (int i = 0; i <= frames; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.InputFramesPerSecond")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.InputFramesPerSecond", kFps)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, SentFpsHistogramIsUpdated) { | 
 |   EncodedImage encoded_image; | 
 |   const int kFps = 20; | 
 |   const int kMinPeriodicSamples = 6; | 
 |   int frames = kMinPeriodicSamples * kFpsPeriodicIntervalMs * kFps / 1000 + 1; | 
 |   for (int i = 0; i < frames; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + 1); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |     // Frame with same timestamp should not be counted. | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.SentFramesPerSecond")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.SentFramesPerSecond", kFps)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, InputFpsHistogramExcludesSuspendedTime) { | 
 |   const int kFps = 20; | 
 |   const int kSuspendTimeMs = 10000; | 
 |   const int kMinPeriodicSamples = 6; | 
 |   int frames = kMinPeriodicSamples * kFpsPeriodicIntervalMs * kFps / 1000; | 
 |   for (int i = 0; i < frames; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |   } | 
 |   // Suspend. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |   fake_clock_.AdvanceTimeMilliseconds(kSuspendTimeMs); | 
 |  | 
 |   for (int i = 0; i < frames; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |   } | 
 |   // Suspended time interval should not affect the framerate. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.InputFramesPerSecond")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.InputFramesPerSecond", kFps)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, SentFpsHistogramExcludesSuspendedTime) { | 
 |   EncodedImage encoded_image; | 
 |   const int kFps = 20; | 
 |   const int kSuspendTimeMs = 10000; | 
 |   const int kMinPeriodicSamples = 6; | 
 |   int frames = kMinPeriodicSamples * kFpsPeriodicIntervalMs * kFps / 1000; | 
 |   for (int i = 0; i < frames; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(i + 1); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |   // Suspend. | 
 |   statistics_proxy_->OnSuspendChange(true); | 
 |   fake_clock_.AdvanceTimeMilliseconds(kSuspendTimeMs); | 
 |  | 
 |   for (int i = 0; i < frames; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(i + 1); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |   // Suspended time interval should not affect the framerate. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.SentFramesPerSecond")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.SentFramesPerSecond", kFps)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, CpuLimitedHistogramNotUpdatedWhenDisabled) { | 
 |   statistics_proxy_->UpdateAdaptationSettings(kResolutionScalingDisabled, | 
 |                                               kResolutionScalingDisabled); | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.CpuLimitedResolutionInPercent")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, CpuLimitedHistogramUpdated) { | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   cpu_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |  | 
 |   cpu_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kCpu, | 
 |                                          cpu_counts, quality_counts); | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnIncomingFrame(kWidth, kHeight); | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.CpuLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.CpuLimitedResolutionInPercent", 50)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, LifetimeHistogramIsUpdated) { | 
 |   const int64_t kTimeSec = 3; | 
 |   fake_clock_.AdvanceTimeMilliseconds(kTimeSec * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.SendStreamLifetimeInSeconds")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, | 
 |       metrics::NumEvents("WebRTC.Video.SendStreamLifetimeInSeconds", kTimeSec)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, CodecTypeHistogramIsUpdated) { | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoder.CodecType")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, PauseEventHistogramIsUpdated) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Min runtime has passed. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.NumberOfPauseEvents")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.NumberOfPauseEvents", 0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        PauseEventHistogramIsNotUpdatedIfMinRuntimeHasNotPassed) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Min runtime has not passed. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000 - 1); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.NumberOfPauseEvents")); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.PausedTimeInPercent")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        PauseEventHistogramIsNotUpdatedIfNoMediaIsSent) { | 
 |   // First RTP packet not sent. | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.NumberOfPauseEvents")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, NoPauseEvent) { | 
 |   // First RTP packet sent and min runtime passed. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // No change. Video: 10000 ms, paused: 0 ms (0%). | 
 |   statistics_proxy_->OnSetEncoderTargetRate(50000); | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0);  // VideoSendStream::Stop | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.NumberOfPauseEvents")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.NumberOfPauseEvents", 0)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.PausedTimeInPercent")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.PausedTimeInPercent", 0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, OnePauseEvent) { | 
 |   // First RTP packet sent and min runtime passed. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // One change. Video: 7000 ms, paused: 3000 ms (30%). | 
 |   statistics_proxy_->OnSetEncoderTargetRate(50000); | 
 |   fake_clock_.AdvanceTimeMilliseconds(7000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0); | 
 |   fake_clock_.AdvanceTimeMilliseconds(3000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0);  // VideoSendStream::Stop | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.NumberOfPauseEvents")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.NumberOfPauseEvents", 1)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.PausedTimeInPercent")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.PausedTimeInPercent", 30)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, TwoPauseEvents) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |  | 
 |   // Two changes. Video: 19000 ms, paused: 1000 ms (5%). | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0); | 
 |   fake_clock_.AdvanceTimeMilliseconds(1000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(50000);  // Starts on bitrate > 0. | 
 |   fake_clock_.AdvanceTimeMilliseconds(7000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(60000); | 
 |   fake_clock_.AdvanceTimeMilliseconds(3000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0); | 
 |   fake_clock_.AdvanceTimeMilliseconds(250); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0); | 
 |   fake_clock_.AdvanceTimeMilliseconds(750); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(60000); | 
 |   fake_clock_.AdvanceTimeMilliseconds(5000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(50000); | 
 |   fake_clock_.AdvanceTimeMilliseconds(4000); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0);  // VideoSendStream::Stop | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.NumberOfPauseEvents")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.NumberOfPauseEvents", 2)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.PausedTimeInPercent")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.PausedTimeInPercent", 5)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        PausedTimeHistogramIsNotUpdatedIfMinRuntimeHasNotPassed) { | 
 |   // First RTP packet sent. | 
 |   UpdateDataCounters(kFirstSsrc); | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000); | 
 |  | 
 |   // Min runtime has not passed. | 
 |   statistics_proxy_->OnSetEncoderTargetRate(50000); | 
 |   fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000 - 1); | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0);  // VideoSendStream::Stop | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.PausedTimeInPercent")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_Vp8) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP8; | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
 |     encoded_image.SetSimulcastIndex(0); | 
 |     encoded_image.qp_ = kQpIdx0; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     encoded_image.SetSimulcastIndex(1); | 
 |     encoded_image.qp_ = kQpIdx1; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.Vp8.S0")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Encoded.Qp.Vp8.S0", kQpIdx0)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.Vp8.S1")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Encoded.Qp.Vp8.S1", kQpIdx1)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_Vp8OneSsrc) { | 
 |   test::ScopedKeyValueConfig field_trials; | 
 |   VideoSendStream::Config config(nullptr); | 
 |   config.rtp.ssrcs.push_back(kFirstSsrc); | 
 |   statistics_proxy_.reset(new SendStatisticsProxy( | 
 |       &fake_clock_, config, VideoEncoderConfig::ContentType::kRealtimeVideo, | 
 |       field_trials)); | 
 |  | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP8; | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
 |     encoded_image.SetSimulcastIndex(0); | 
 |     encoded_image.qp_ = kQpIdx0; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.Vp8")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.Encoded.Qp.Vp8", kQpIdx0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_Vp9Svc) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP9; | 
 |   codec_info.codecSpecific.VP9.num_spatial_layers = 2; | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
 |     encoded_image.qp_ = kQpIdx0; | 
 |     encoded_image.SetSpatialIndex(0); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     encoded_image.qp_ = kQpIdx1; | 
 |     encoded_image.SetSpatialIndex(1); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.Vp9.S0")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Encoded.Qp.Vp9.S0", kQpIdx0)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.Vp9.S1")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Encoded.Qp.Vp9.S1", kQpIdx1)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_Vp9OneSpatialLayer) { | 
 |   test::ScopedKeyValueConfig field_trials; | 
 |   VideoSendStream::Config config(nullptr); | 
 |   config.rtp.ssrcs.push_back(kFirstSsrc); | 
 |   statistics_proxy_.reset(new SendStatisticsProxy( | 
 |       &fake_clock_, config, VideoEncoderConfig::ContentType::kRealtimeVideo, | 
 |       field_trials)); | 
 |  | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP9; | 
 |   codec_info.codecSpecific.VP9.num_spatial_layers = 1; | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
 |     encoded_image.qp_ = kQpIdx0; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.Vp9")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.Encoded.Qp.Vp9", kQpIdx0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_H264) { | 
 |   EncodedImage encoded_image; | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecH264; | 
 |  | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) { | 
 |     encoded_image.SetSimulcastIndex(0); | 
 |     encoded_image.qp_ = kQpIdx0; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |     encoded_image.SetSimulcastIndex(1); | 
 |     encoded_image.qp_ = kQpIdx1; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   } | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.H264.S0")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Encoded.Qp.H264.S0", kQpIdx0)); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.Encoded.Qp.H264.S1")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Encoded.Qp.H264.S1", kQpIdx1)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        BandwidthLimitedHistogramsNotUpdatedForOneStream) { | 
 |   // Configure one stream. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kRealtimeVideo; | 
 |   VideoStream stream1; | 
 |   stream1.width = kWidth; | 
 |   stream1.height = kHeight; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {stream1}); | 
 |  | 
 |   const int64_t kMaxEncodedFrameWindowMs = 800; | 
 |   const int kFps = 20; | 
 |   const int kNumFramesPerWindow = kFps * kMaxEncodedFrameWindowMs / 1000; | 
 |   const int kMinSamples =  // Sample added when removed from EncodedFrameMap. | 
 |       SendStatisticsProxy::kMinRequiredMetricsSamples + kNumFramesPerWindow; | 
 |  | 
 |   // Stream encoded. | 
 |   EncodedImage encoded_image; | 
 |   encoded_image._encodedWidth = kWidth; | 
 |   encoded_image._encodedHeight = kHeight; | 
 |   for (int i = 0; i < kMinSamples; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                (kRtpClockRateHz / kFps)); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |  | 
 |   // Histograms are updated when the statistics_proxy_ is deleted. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples( | 
 |                           "WebRTC.Video.BandwidthLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples( | 
 |                           "WebRTC.Video.BandwidthLimitedResolutionsDisabled")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        BandwidthLimitedHistogramsUpdatedForTwoStreams_NoResolutionDisabled) { | 
 |   // Configure two streams. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kRealtimeVideo; | 
 |   VideoStream stream1; | 
 |   stream1.width = kWidth / 2; | 
 |   stream1.height = kHeight / 2; | 
 |   VideoStream stream2; | 
 |   stream2.width = kWidth; | 
 |   stream2.height = kHeight; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {stream1, stream2}); | 
 |  | 
 |   const int64_t kMaxEncodedFrameWindowMs = 800; | 
 |   const int kFps = 20; | 
 |   const int kNumFramesPerWindow = kFps * kMaxEncodedFrameWindowMs / 1000; | 
 |   const int kMinSamples =  // Sample added when removed from EncodedFrameMap. | 
 |       SendStatisticsProxy::kMinRequiredMetricsSamples + kNumFramesPerWindow; | 
 |  | 
 |   // Two streams encoded. | 
 |   EncodedImage encoded_image; | 
 |   for (int i = 0; i < kMinSamples; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                (kRtpClockRateHz / kFps)); | 
 |     encoded_image._encodedWidth = kWidth; | 
 |     encoded_image._encodedHeight = kHeight; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |     encoded_image._encodedWidth = kWidth / 2; | 
 |     encoded_image._encodedHeight = kHeight / 2; | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |  | 
 |   // Histograms are updated when the statistics_proxy_ is deleted. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.BandwidthLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.BandwidthLimitedResolutionInPercent", | 
 |                             0)); | 
 |   // No resolution disabled. | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples( | 
 |                           "WebRTC.Video.BandwidthLimitedResolutionsDisabled")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        BandwidthLimitedHistogramsUpdatedForTwoStreams_OneResolutionDisabled) { | 
 |   // Configure two streams. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kRealtimeVideo; | 
 |   VideoStream stream1; | 
 |   stream1.width = kWidth / 2; | 
 |   stream1.height = kHeight / 2; | 
 |   VideoStream stream2; | 
 |   stream2.width = kWidth; | 
 |   stream2.height = kHeight; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {stream1, stream2}); | 
 |  | 
 |   const int64_t kMaxEncodedFrameWindowMs = 800; | 
 |   const int kFps = 20; | 
 |   const int kNumFramesPerWindow = kFps * kMaxEncodedFrameWindowMs / 1000; | 
 |   const int kMinSamples =  // Sample added when removed from EncodedFrameMap. | 
 |       SendStatisticsProxy::kMinRequiredMetricsSamples + kNumFramesPerWindow; | 
 |  | 
 |   // One stream encoded. | 
 |   EncodedImage encoded_image; | 
 |   encoded_image._encodedWidth = kWidth / 2; | 
 |   encoded_image._encodedHeight = kHeight / 2; | 
 |   for (int i = 0; i < kMinSamples; ++i) { | 
 |     fake_clock_.AdvanceTimeMilliseconds(1000 / kFps); | 
 |     encoded_image.SetTimestamp(encoded_image.Timestamp() + | 
 |                                (kRtpClockRateHz / kFps)); | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   } | 
 |  | 
 |   // Histograms are updated when the statistics_proxy_ is deleted. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.BandwidthLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.BandwidthLimitedResolutionInPercent", | 
 |                             100)); | 
 |   // One resolution disabled. | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.BandwidthLimitedResolutionsDisabled")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.BandwidthLimitedResolutionsDisabled", | 
 |                             1)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitedHistogramsNotUpdatedWhenDisabled) { | 
 |   statistics_proxy_->UpdateAdaptationSettings(kFramerateScalingDisabled, | 
 |                                               kScalingDisabled); | 
 |   EncodedImage encoded_image; | 
 |   encoded_image.SetSimulcastIndex(0); | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &kDefaultCodecInfo); | 
 |  | 
 |   // Histograms are updated when the statistics_proxy_ is deleted. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples("WebRTC.Video.QualityLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples( | 
 |                           "WebRTC.Video.QualityLimitedResolutionDownscales")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitedHistogramsUpdatedWhenEnabled_NoResolutionDownscale) { | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   EncodedImage encoded_image; | 
 |   encoded_image.SetSimulcastIndex(0); | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &kDefaultCodecInfo); | 
 |  | 
 |   // Histograms are updated when the statistics_proxy_ is deleted. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.QualityLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumEvents( | 
 |                           "WebRTC.Video.QualityLimitedResolutionInPercent", 0)); | 
 |   // No resolution downscale. | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples( | 
 |                           "WebRTC.Video.QualityLimitedResolutionDownscales")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, | 
 |        QualityLimitedHistogramsUpdatedWhenEnabled_TwoResolutionDownscales) { | 
 |   const int kDownscales = 2; | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   quality_counts.resolution_adaptations = kDownscales; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kScalingEnabled, kScalingEnabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   EncodedImage encoded_image; | 
 |   encoded_image.SetSimulcastIndex(0); | 
 |   for (int i = 0; i < SendStatisticsProxy::kMinRequiredMetricsSamples; ++i) | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image, &kDefaultCodecInfo); | 
 |   // Histograms are updated when the statistics_proxy_ is deleted. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.QualityLimitedResolutionInPercent")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.QualityLimitedResolutionInPercent", | 
 |                             100)); | 
 |   // Resolution downscales. | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.QualityLimitedResolutionDownscales")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.QualityLimitedResolutionDownscales", | 
 |                             kDownscales)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsBandwidthLimitedResolution) { | 
 |   // Initially false. | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |  | 
 |   // Configure two streams. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kRealtimeVideo; | 
 |   config.number_of_streams = 2; | 
 |   VideoStream stream1; | 
 |   stream1.width = kWidth / 2; | 
 |   stream1.height = kHeight / 2; | 
 |   VideoStream stream2; | 
 |   stream2.width = kWidth; | 
 |   stream2.height = kHeight; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {stream1, stream2}); | 
 |  | 
 |   // One stream encoded. | 
 |   EncodedImage encoded_image; | 
 |   encoded_image._encodedWidth = kWidth / 2; | 
 |   encoded_image._encodedHeight = kHeight / 2; | 
 |  | 
 |   // Resolution scaled due to quality. | 
 |   VideoAdaptationCounters cpu_counts; | 
 |   VideoAdaptationCounters quality_counts; | 
 |   quality_counts.resolution_adaptations = 1; | 
 |   statistics_proxy_->UpdateAdaptationSettings(kFramerateScalingDisabled, | 
 |                                               kFramerateScalingDisabled); | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |  | 
 |   // Adapt up. | 
 |   quality_counts.resolution_adaptations = 0; | 
 |   statistics_proxy_->OnAdaptationChanged(VideoAdaptationReason::kQuality, | 
 |                                          cpu_counts, quality_counts); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, nullptr); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |  | 
 |   // Bw disabled one layer. | 
 |   VideoCodec codec; | 
 |   codec.numberOfSimulcastStreams = 2; | 
 |   codec.simulcastStream[0].active = true; | 
 |   codec.simulcastStream[1].active = true; | 
 |   VideoBitrateAllocation allocation; | 
 |   // Some positive bitrate only on the second stream. | 
 |   allocation.SetBitrate(1, 0, 10000); | 
 |   allocation.set_bw_limited(true); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |  | 
 |   // Revert for the next test. | 
 |   allocation.set_bw_limited(false); | 
 |   statistics_proxy_->OnBitrateAllocationUpdated(codec, allocation); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 |  | 
 |   // Internal encoder scaler reduced resolution. | 
 |   statistics_proxy_->OnEncoderInternalScalerUpdate(/*scaled=*/true); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().bw_limited_resolution); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsTargetMediaBitrate) { | 
 |   // Initially zero. | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().target_media_bitrate_bps); | 
 |  | 
 |   const int kBitrate = 100000; | 
 |   statistics_proxy_->OnSetEncoderTargetRate(kBitrate); | 
 |   EXPECT_EQ(kBitrate, statistics_proxy_->GetStats().target_media_bitrate_bps); | 
 |  | 
 |   statistics_proxy_->OnSetEncoderTargetRate(0); | 
 |   EXPECT_EQ(0, statistics_proxy_->GetStats().target_media_bitrate_bps); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, NoSubstreams) { | 
 |   uint32_t excluded_ssrc = | 
 |       std::max(*absl::c_max_element(config_.rtp.ssrcs), | 
 |                *absl::c_max_element(config_.rtp.rtx.ssrcs)) + | 
 |       1; | 
 |   // From ReportBlockDataObserver. | 
 |   ReportBlockDataObserver* rtcp_callback = statistics_proxy_.get(); | 
 |   RTCPReportBlock report_block; | 
 |   report_block.source_ssrc = excluded_ssrc; | 
 |   ReportBlockData data; | 
 |   data.SetReportBlock(report_block, 0); | 
 |   rtcp_callback->OnReportBlockDataUpdated(data); | 
 |  | 
 |   // From BitrateStatisticsObserver. | 
 |   uint32_t total = 0; | 
 |   uint32_t retransmit = 0; | 
 |   BitrateStatisticsObserver* bitrate_observer = statistics_proxy_.get(); | 
 |   bitrate_observer->Notify(total, retransmit, excluded_ssrc); | 
 |  | 
 |   // From FrameCountObserver. | 
 |   FrameCountObserver* fps_observer = statistics_proxy_.get(); | 
 |   FrameCounts frame_counts; | 
 |   frame_counts.key_frames = 1; | 
 |   fps_observer->FrameCountUpdated(frame_counts, excluded_ssrc); | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_TRUE(stats.substreams.empty()); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, EncodedResolutionTimesOut) { | 
 |   static const int kEncodedWidth = 123; | 
 |   static const int kEncodedHeight = 81; | 
 |   EncodedImage encoded_image; | 
 |   encoded_image._encodedWidth = kEncodedWidth; | 
 |   encoded_image._encodedHeight = kEncodedHeight; | 
 |   encoded_image.SetSimulcastIndex(0); | 
 |  | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP8; | 
 |  | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   encoded_image.SetSimulcastIndex(1); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodedWidth, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(kEncodedHeight, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 |   EXPECT_EQ(kEncodedWidth, stats.substreams[config_.rtp.ssrcs[1]].width); | 
 |   EXPECT_EQ(kEncodedHeight, stats.substreams[config_.rtp.ssrcs[1]].height); | 
 |  | 
 |   // Forward almost to timeout, this should not have removed stats. | 
 |   fake_clock_.AdvanceTimeMilliseconds(SendStatisticsProxy::kStatsTimeoutMs - 1); | 
 |   stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodedWidth, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(kEncodedHeight, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 |  | 
 |   // Update the first SSRC with bogus RTCP stats to make sure that encoded | 
 |   // resolution still times out (no global timeout for all stats). | 
 |   ReportBlockDataObserver* rtcp_callback = statistics_proxy_.get(); | 
 |   RTCPReportBlock report_block; | 
 |   report_block.source_ssrc = config_.rtp.ssrcs[0]; | 
 |   ReportBlockData data; | 
 |   data.SetReportBlock(report_block, 0); | 
 |   rtcp_callback->OnReportBlockDataUpdated(data); | 
 |  | 
 |   // Report stats for second SSRC to make sure it's not outdated along with the | 
 |   // first SSRC. | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |  | 
 |   // Forward 1 ms, reach timeout, substream 0 should have no resolution | 
 |   // reported, but substream 1 should. | 
 |   fake_clock_.AdvanceTimeMilliseconds(1); | 
 |   stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(0, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(0, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 |   EXPECT_EQ(kEncodedWidth, stats.substreams[config_.rtp.ssrcs[1]].width); | 
 |   EXPECT_EQ(kEncodedHeight, stats.substreams[config_.rtp.ssrcs[1]].height); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ClearsResolutionFromInactiveSsrcs) { | 
 |   static const int kEncodedWidth = 123; | 
 |   static const int kEncodedHeight = 81; | 
 |   EncodedImage encoded_image; | 
 |   encoded_image._encodedWidth = kEncodedWidth; | 
 |   encoded_image._encodedHeight = kEncodedHeight; | 
 |   encoded_image.SetSimulcastIndex(0); | 
 |  | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP8; | 
 |  | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   encoded_image.SetSimulcastIndex(1); | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |  | 
 |   statistics_proxy_->OnInactiveSsrc(config_.rtp.ssrcs[1]); | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodedWidth, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(kEncodedHeight, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 |   EXPECT_EQ(0, stats.substreams[config_.rtp.ssrcs[1]].width); | 
 |   EXPECT_EQ(0, stats.substreams[config_.rtp.ssrcs[1]].height); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ClearsBitratesFromInactiveSsrcs) { | 
 |   uint32_t bitrate = 42; | 
 |   BitrateStatisticsObserver* observer = statistics_proxy_.get(); | 
 |   observer->Notify(bitrate, bitrate, config_.rtp.ssrcs[0]); | 
 |   observer->Notify(bitrate, bitrate, config_.rtp.ssrcs[1]); | 
 |  | 
 |   statistics_proxy_->OnInactiveSsrc(config_.rtp.ssrcs[1]); | 
 |  | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(static_cast<int>(bitrate), | 
 |             stats.substreams[config_.rtp.ssrcs[0]].total_bitrate_bps); | 
 |   EXPECT_EQ(static_cast<int>(bitrate), | 
 |             stats.substreams[config_.rtp.ssrcs[0]].retransmit_bitrate_bps); | 
 |   EXPECT_EQ(0, stats.substreams[config_.rtp.ssrcs[1]].total_bitrate_bps); | 
 |   EXPECT_EQ(0, stats.substreams[config_.rtp.ssrcs[1]].retransmit_bitrate_bps); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ResetsRtcpCountersOnContentChange) { | 
 |   RtcpPacketTypeCounterObserver* proxy = | 
 |       static_cast<RtcpPacketTypeCounterObserver*>(statistics_proxy_.get()); | 
 |   RtcpPacketTypeCounter counters; | 
 |   proxy->RtcpPacketTypesCounterUpdated(kFirstSsrc, counters); | 
 |   proxy->RtcpPacketTypesCounterUpdated(kSecondSsrc, counters); | 
 |  | 
 |   fake_clock_.AdvanceTimeMilliseconds(1000 * metrics::kMinRunTimeInSeconds); | 
 |  | 
 |   counters.nack_packets += 1 * metrics::kMinRunTimeInSeconds; | 
 |   counters.fir_packets += 2 * metrics::kMinRunTimeInSeconds; | 
 |   counters.pli_packets += 3 * metrics::kMinRunTimeInSeconds; | 
 |   counters.unique_nack_requests += 4 * metrics::kMinRunTimeInSeconds; | 
 |   counters.nack_requests += 5 * metrics::kMinRunTimeInSeconds; | 
 |  | 
 |   proxy->RtcpPacketTypesCounterUpdated(kFirstSsrc, counters); | 
 |   proxy->RtcpPacketTypesCounterUpdated(kSecondSsrc, counters); | 
 |  | 
 |   // Changing content type causes histograms to be reported. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kScreen; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {}); | 
 |  | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.NackPacketsReceivedPerMinute")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.FirPacketsReceivedPerMinute")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.PliPacketsReceivedPerMinute")); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.UniqueNackRequestsReceivedInPercent")); | 
 |  | 
 |   const int kRate = 60 * 2;  // Packets per minute with two streams. | 
 |  | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.NackPacketsReceivedPerMinute", | 
 |                             1 * kRate)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.FirPacketsReceivedPerMinute", | 
 |                             2 * kRate)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.PliPacketsReceivedPerMinute", | 
 |                             3 * kRate)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.UniqueNackRequestsReceivedInPercent", | 
 |                             4 * 100 / 5)); | 
 |  | 
 |   // New start time but same counter values. | 
 |   proxy->RtcpPacketTypesCounterUpdated(kFirstSsrc, counters); | 
 |   proxy->RtcpPacketTypesCounterUpdated(kSecondSsrc, counters); | 
 |  | 
 |   fake_clock_.AdvanceTimeMilliseconds(1000 * metrics::kMinRunTimeInSeconds); | 
 |  | 
 |   counters.nack_packets += 1 * metrics::kMinRunTimeInSeconds; | 
 |   counters.fir_packets += 2 * metrics::kMinRunTimeInSeconds; | 
 |   counters.pli_packets += 3 * metrics::kMinRunTimeInSeconds; | 
 |   counters.unique_nack_requests += 4 * metrics::kMinRunTimeInSeconds; | 
 |   counters.nack_requests += 5 * metrics::kMinRunTimeInSeconds; | 
 |  | 
 |   proxy->RtcpPacketTypesCounterUpdated(kFirstSsrc, counters); | 
 |   proxy->RtcpPacketTypesCounterUpdated(kSecondSsrc, counters); | 
 |  | 
 |   SetUp();  // Reset stats proxy also causes histograms to be reported. | 
 |  | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples( | 
 |              "WebRTC.Video.Screenshare.NackPacketsReceivedPerMinute")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples( | 
 |                        "WebRTC.Video.Screenshare.FirPacketsReceivedPerMinute")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples( | 
 |                        "WebRTC.Video.Screenshare.PliPacketsReceivedPerMinute")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples( | 
 |              "WebRTC.Video.Screenshare.UniqueNackRequestsReceivedInPercent")); | 
 |  | 
 |   EXPECT_METRIC_EQ( | 
 |       1, | 
 |       metrics::NumEvents( | 
 |           "WebRTC.Video.Screenshare.NackPacketsReceivedPerMinute", 1 * kRate)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, | 
 |       metrics::NumEvents("WebRTC.Video.Screenshare.FirPacketsReceivedPerMinute", | 
 |                          2 * kRate)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, | 
 |       metrics::NumEvents("WebRTC.Video.Screenshare.PliPacketsReceivedPerMinute", | 
 |                          3 * kRate)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents( | 
 |              "WebRTC.Video.Screenshare.UniqueNackRequestsReceivedInPercent", | 
 |              4 * 100 / 5)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsIsRtx) { | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |   proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |   proxy->DataCountersUpdated(counters, kFirstRtxSsrc); | 
 |  | 
 |   EXPECT_NE(GetStreamStats(kFirstSsrc).type, | 
 |             VideoSendStream::StreamStats::StreamType::kRtx); | 
 |   EXPECT_EQ(GetStreamStats(kFirstSsrc).referenced_media_ssrc, absl::nullopt); | 
 |   EXPECT_EQ(GetStreamStats(kFirstRtxSsrc).type, | 
 |             VideoSendStream::StreamStats::StreamType::kRtx); | 
 |   EXPECT_EQ(GetStreamStats(kFirstRtxSsrc).referenced_media_ssrc, kFirstSsrc); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsIsFlexFec) { | 
 |   test::ScopedKeyValueConfig field_trials; | 
 |   statistics_proxy_.reset(new SendStatisticsProxy( | 
 |       &fake_clock_, GetTestConfigWithFlexFec(), | 
 |       VideoEncoderConfig::ContentType::kRealtimeVideo, field_trials)); | 
 |  | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |   proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |   proxy->DataCountersUpdated(counters, kFlexFecSsrc); | 
 |  | 
 |   EXPECT_NE(GetStreamStats(kFirstSsrc).type, | 
 |             VideoSendStream::StreamStats::StreamType::kFlexfec); | 
 |   EXPECT_EQ(GetStreamStats(kFirstSsrc).referenced_media_ssrc, absl::nullopt); | 
 |   EXPECT_EQ(GetStreamStats(kFlexFecSsrc).type, | 
 |             VideoSendStream::StreamStats::StreamType::kFlexfec); | 
 |   EXPECT_EQ(GetStreamStats(kFlexFecSsrc).referenced_media_ssrc, kFirstSsrc); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, SendBitratesAreReportedWithFlexFecEnabled) { | 
 |   test::ScopedKeyValueConfig field_trials; | 
 |   statistics_proxy_.reset(new SendStatisticsProxy( | 
 |       &fake_clock_, GetTestConfigWithFlexFec(), | 
 |       VideoEncoderConfig::ContentType::kRealtimeVideo, field_trials)); | 
 |  | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |   StreamDataCounters rtx_counters; | 
 |  | 
 |   const int kMinRequiredPeriodSamples = 8; | 
 |   const int kPeriodIntervalMs = 2000; | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.padding_bytes += 1000; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     counters.retransmitted.packets += 2; | 
 |     counters.retransmitted.header_bytes += 25; | 
 |     counters.retransmitted.padding_bytes += 100; | 
 |     counters.retransmitted.payload_bytes += 250; | 
 |     counters.fec = counters.retransmitted; | 
 |     rtx_counters.transmitted = counters.transmitted; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |     proxy->DataCountersUpdated(counters, kSecondSsrc); | 
 |     proxy->DataCountersUpdated(rtx_counters, kFirstRtxSsrc); | 
 |     proxy->DataCountersUpdated(rtx_counters, kSecondRtxSsrc); | 
 |     proxy->DataCountersUpdated(counters, kFlexFecSsrc); | 
 |   } | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   // Interval: 3500 bytes * 4 / 2 sec = 7000 bytes / sec  = 56 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.BitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumEvents("WebRTC.Video.BitrateSentInKbps", 56)); | 
 |   // Interval: 3500 bytes * 2 / 2 sec = 3500 bytes / sec  = 28 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.RtxBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.RtxBitrateSentInKbps", 28)); | 
 |   // Interval: (2000 - 2 * 250) bytes / 2 sec = 1500 bytes / sec  = 12 kbps | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples("WebRTC.Video.MediaBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.MediaBitrateSentInKbps", 12)); | 
 |   // Interval: 1000 bytes * 4 / 2 sec = 2000 bytes / sec = 16 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.PaddingBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.PaddingBitrateSentInKbps", 16)); | 
 |   // Interval: 375 bytes * 2 / 2 sec = 375 bytes / sec = 3 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.FecBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.FecBitrateSentInKbps", 3)); | 
 |   // Interval: 375 bytes * 2 / 2 sec = 375 bytes / sec = 3 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.RetransmittedBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.RetransmittedBitrateSentInKbps", 3)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, ResetsRtpCountersOnContentChange) { | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |   StreamDataCounters rtx_counters; | 
 |   counters.first_packet_time_ms = fake_clock_.TimeInMilliseconds(); | 
 |  | 
 |   const int kMinRequiredPeriodSamples = 8; | 
 |   const int kPeriodIntervalMs = 2000; | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.padding_bytes += 1000; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     counters.retransmitted.packets += 2; | 
 |     counters.retransmitted.header_bytes += 25; | 
 |     counters.retransmitted.padding_bytes += 100; | 
 |     counters.retransmitted.payload_bytes += 250; | 
 |     counters.fec = counters.retransmitted; | 
 |     rtx_counters.transmitted = counters.transmitted; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |     proxy->DataCountersUpdated(counters, kSecondSsrc); | 
 |     proxy->DataCountersUpdated(rtx_counters, kFirstRtxSsrc); | 
 |     proxy->DataCountersUpdated(rtx_counters, kSecondRtxSsrc); | 
 |   } | 
 |  | 
 |   // Changing content type causes histograms to be reported. | 
 |   VideoEncoderConfig config; | 
 |   config.content_type = VideoEncoderConfig::ContentType::kScreen; | 
 |   statistics_proxy_->OnEncoderReconfigured(config, {}); | 
 |  | 
 |   // Interval: 3500 bytes * 4 / 2 sec = 7000 bytes / sec  = 56 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.BitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumEvents("WebRTC.Video.BitrateSentInKbps", 56)); | 
 |   // Interval: 3500 bytes * 2 / 2 sec = 3500 bytes / sec  = 28 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.RtxBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.RtxBitrateSentInKbps", 28)); | 
 |   // Interval: (2000 - 2 * 250) bytes / 2 sec = 1500 bytes / sec  = 12 kbps | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples("WebRTC.Video.MediaBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.MediaBitrateSentInKbps", 12)); | 
 |   // Interval: 1000 bytes * 4 / 2 sec = 2000 bytes / sec = 16 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.PaddingBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.PaddingBitrateSentInKbps", 16)); | 
 |   // Interval: 375 bytes * 2 / 2 sec = 375 bytes / sec = 3 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.FecBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.FecBitrateSentInKbps", 3)); | 
 |   // Interval: 375 bytes * 2 / 2 sec = 375 bytes / sec = 3 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.RetransmittedBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.RetransmittedBitrateSentInKbps", 3)); | 
 |  | 
 |   // New metric counters but same data counters. | 
 |   // Double counter values, this should result in the same counts as before but | 
 |   // with new histogram names. | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.padding_bytes += 1000; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     counters.retransmitted.packets += 2; | 
 |     counters.retransmitted.header_bytes += 25; | 
 |     counters.retransmitted.padding_bytes += 100; | 
 |     counters.retransmitted.payload_bytes += 250; | 
 |     counters.fec = counters.retransmitted; | 
 |     rtx_counters.transmitted = counters.transmitted; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |     proxy->DataCountersUpdated(counters, kSecondSsrc); | 
 |     proxy->DataCountersUpdated(rtx_counters, kFirstRtxSsrc); | 
 |     proxy->DataCountersUpdated(rtx_counters, kSecondRtxSsrc); | 
 |   } | 
 |  | 
 |   // Reset stats proxy also causes histograms to be reported. | 
 |   statistics_proxy_.reset(); | 
 |  | 
 |   // Interval: 3500 bytes * 4 / 2 sec = 7000 bytes / sec  = 56 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.Screenshare.BitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Screenshare.BitrateSentInKbps", 56)); | 
 |   // Interval: 3500 bytes * 2 / 2 sec = 3500 bytes / sec  = 28 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.Screenshare.RtxBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumEvents( | 
 |                           "WebRTC.Video.Screenshare.RtxBitrateSentInKbps", 28)); | 
 |   // Interval: (2000 - 2 * 250) bytes / 2 sec = 1500 bytes / sec  = 12 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.Screenshare.MediaBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Screenshare.MediaBitrateSentInKbps", | 
 |                             12)); | 
 |   // Interval: 1000 bytes * 4 / 2 sec = 2000 bytes / sec = 16 kbps | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples( | 
 |                           "WebRTC.Video.Screenshare.PaddingBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents("WebRTC.Video.Screenshare.PaddingBitrateSentInKbps", | 
 |                             16)); | 
 |   // Interval: 375 bytes * 2 / 2 sec = 375 bytes / sec = 3 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples("WebRTC.Video.Screenshare.FecBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumEvents( | 
 |                           "WebRTC.Video.Screenshare.FecBitrateSentInKbps", 3)); | 
 |   // Interval: 375 bytes * 2 / 2 sec = 375 bytes / sec = 3 kbps | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples( | 
 |              "WebRTC.Video.Screenshare.RetransmittedBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents( | 
 |              "WebRTC.Video.Screenshare.RetransmittedBitrateSentInKbps", 3)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, RtxBitrateIsZeroWhenEnabledAndNoRtxDataIsSent) { | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |   StreamDataCounters rtx_counters; | 
 |  | 
 |   const int kMinRequiredPeriodSamples = 8; | 
 |   const int kPeriodIntervalMs = 2000; | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     counters.fec = counters.retransmitted; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |   } | 
 |  | 
 |   // RTX enabled. No data sent over RTX. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.RtxBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.RtxBitrateSentInKbps", 0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, RtxBitrateNotReportedWhenNotEnabled) { | 
 |   test::ScopedKeyValueConfig field_trials; | 
 |   VideoSendStream::Config config(nullptr); | 
 |   config.rtp.ssrcs.push_back(kFirstSsrc);  // RTX not configured. | 
 |   statistics_proxy_.reset(new SendStatisticsProxy( | 
 |       &fake_clock_, config, VideoEncoderConfig::ContentType::kRealtimeVideo, | 
 |       field_trials)); | 
 |  | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |  | 
 |   const int kMinRequiredPeriodSamples = 8; | 
 |   const int kPeriodIntervalMs = 2000; | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     counters.fec = counters.retransmitted; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |   } | 
 |  | 
 |   // RTX not enabled. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.RtxBitrateSentInKbps")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, FecBitrateIsZeroWhenEnabledAndNoFecDataIsSent) { | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |   StreamDataCounters rtx_counters; | 
 |  | 
 |   const int kMinRequiredPeriodSamples = 8; | 
 |   const int kPeriodIntervalMs = 2000; | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |   } | 
 |  | 
 |   // FEC enabled. No FEC data sent. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, metrics::NumSamples("WebRTC.Video.FecBitrateSentInKbps")); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumEvents("WebRTC.Video.FecBitrateSentInKbps", 0)); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, FecBitrateNotReportedWhenNotEnabled) { | 
 |   test::ScopedKeyValueConfig field_trials; | 
 |   VideoSendStream::Config config(nullptr); | 
 |   config.rtp.ssrcs.push_back(kFirstSsrc);  // FEC not configured. | 
 |   statistics_proxy_.reset(new SendStatisticsProxy( | 
 |       &fake_clock_, config, VideoEncoderConfig::ContentType::kRealtimeVideo, | 
 |       field_trials)); | 
 |  | 
 |   StreamDataCountersCallback* proxy = | 
 |       static_cast<StreamDataCountersCallback*>(statistics_proxy_.get()); | 
 |   StreamDataCounters counters; | 
 |  | 
 |   const int kMinRequiredPeriodSamples = 8; | 
 |   const int kPeriodIntervalMs = 2000; | 
 |   for (int i = 0; i < kMinRequiredPeriodSamples; ++i) { | 
 |     counters.transmitted.packets += 20; | 
 |     counters.transmitted.header_bytes += 500; | 
 |     counters.transmitted.payload_bytes += 2000; | 
 |     counters.fec = counters.retransmitted; | 
 |     // Advance one interval and update counters. | 
 |     fake_clock_.AdvanceTimeMilliseconds(kPeriodIntervalMs); | 
 |     proxy->DataCountersUpdated(counters, kFirstSsrc); | 
 |   } | 
 |  | 
 |   // FEC not enabled. | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, metrics::NumSamples("WebRTC.Video.FecBitrateSentInKbps")); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, GetStatsReportsEncoderImplementationName) { | 
 |   const std::string kName = "encoderName"; | 
 |   statistics_proxy_->OnEncoderImplementationChanged(EncoderImplementation{ | 
 |       .name = kName, | 
 |       .is_hardware_accelerated = true, | 
 |   }); | 
 |   EXPECT_EQ(kName, statistics_proxy_->GetStats().encoder_implementation_name); | 
 |   EXPECT_THAT(statistics_proxy_->GetStats().power_efficient_encoder, | 
 |               ::testing::IsTrue()); | 
 | } | 
 |  | 
 | TEST_F(SendStatisticsProxyTest, Vp9SvcLowSpatialLayerDoesNotUpdateResolution) { | 
 |   static const int kEncodedWidth = 123; | 
 |   static const int kEncodedHeight = 81; | 
 |   EncodedImage encoded_image; | 
 |   encoded_image._encodedWidth = kEncodedWidth; | 
 |   encoded_image._encodedHeight = kEncodedHeight; | 
 |   encoded_image.SetSpatialIndex(0); | 
 |  | 
 |   CodecSpecificInfo codec_info; | 
 |   codec_info.codecType = kVideoCodecVP9; | 
 |  | 
 |   // For first picture, it is expected that low layer updates resolution. | 
 |   codec_info.end_of_picture = false; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   VideoSendStream::Stats stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodedWidth, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(kEncodedHeight, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 |  | 
 |   // Top layer updates resolution. | 
 |   encoded_image._encodedWidth = kEncodedWidth * 2; | 
 |   encoded_image._encodedHeight = kEncodedHeight * 2; | 
 |   codec_info.end_of_picture = true; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodedWidth * 2, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(kEncodedHeight * 2, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 |  | 
 |   // Low layer of next frame doesn't update resolution. | 
 |   encoded_image._encodedWidth = kEncodedWidth; | 
 |   encoded_image._encodedHeight = kEncodedHeight; | 
 |   codec_info.end_of_picture = false; | 
 |   statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info); | 
 |   stats = statistics_proxy_->GetStats(); | 
 |   EXPECT_EQ(kEncodedWidth * 2, stats.substreams[config_.rtp.ssrcs[0]].width); | 
 |   EXPECT_EQ(kEncodedHeight * 2, stats.substreams[config_.rtp.ssrcs[0]].height); | 
 | } | 
 |  | 
 | class ForcedFallbackTest : public SendStatisticsProxyTest { | 
 |  public: | 
 |   explicit ForcedFallbackTest(const std::string& field_trials) | 
 |       : SendStatisticsProxyTest(field_trials) { | 
 |     codec_info_.codecType = kVideoCodecVP8; | 
 |     codec_info_.codecSpecific.VP8.temporalIdx = 0; | 
 |     encoded_image_._encodedWidth = kWidth; | 
 |     encoded_image_._encodedHeight = kHeight; | 
 |     encoded_image_.SetSimulcastIndex(0); | 
 |   } | 
 |  | 
 |   ~ForcedFallbackTest() override {} | 
 |  | 
 |  protected: | 
 |   void InsertEncodedFrames(int num_frames, int interval_ms) { | 
 |     statistics_proxy_->OnEncoderImplementationChanged( | 
 |         {.name = codec_name_, .is_hardware_accelerated = false}); | 
 |  | 
 |     // First frame is not updating stats, insert initial frame. | 
 |     if (statistics_proxy_->GetStats().frames_encoded == 0) { | 
 |       statistics_proxy_->OnSendEncodedImage(encoded_image_, &codec_info_); | 
 |     } | 
 |     for (int i = 0; i < num_frames; ++i) { | 
 |       statistics_proxy_->OnSendEncodedImage(encoded_image_, &codec_info_); | 
 |       fake_clock_.AdvanceTimeMilliseconds(interval_ms); | 
 |     } | 
 |     // Add frame to include last time interval. | 
 |     statistics_proxy_->OnSendEncodedImage(encoded_image_, &codec_info_); | 
 |   } | 
 |  | 
 |   EncodedImage encoded_image_; | 
 |   CodecSpecificInfo codec_info_; | 
 |   std::string codec_name_; | 
 |   const std::string kPrefix = "WebRTC.Video.Encoder.ForcedSw"; | 
 |   const int kFrameIntervalMs = 1000; | 
 |   const int kMinFrames = 20;  // Min run time 20 sec. | 
 | }; | 
 |  | 
 | class ForcedFallbackDisabled : public ForcedFallbackTest { | 
 |  public: | 
 |   ForcedFallbackDisabled() | 
 |       : ForcedFallbackTest("WebRTC-VP8-Forced-Fallback-Encoder-v2/Disabled-1," + | 
 |                            std::to_string(kWidth * kHeight) + ",3/") {} | 
 | }; | 
 |  | 
 | class ForcedFallbackEnabled : public ForcedFallbackTest { | 
 |  public: | 
 |   ForcedFallbackEnabled() | 
 |       : ForcedFallbackTest("WebRTC-VP8-Forced-Fallback-Encoder-v2/Enabled-1," + | 
 |                            std::to_string(kWidth * kHeight) + ",3/") {} | 
 | }; | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, StatsNotUpdatedIfMinRunTimeHasNotPassed) { | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs - 1); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, StatsUpdated) { | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents(kPrefix + "FallbackTimeInPercent.Vp8", 0)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents(kPrefix + "FallbackChangesPerMinute.Vp8", 0)); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, StatsNotUpdatedIfNotVp8) { | 
 |   codec_info_.codecType = kVideoCodecVP9; | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, StatsNotUpdatedForTemporalLayers) { | 
 |   codec_info_.codecSpecific.VP8.temporalIdx = 1; | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, StatsNotUpdatedForSimulcast) { | 
 |   encoded_image_.SetSimulcastIndex(1); | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackDisabled, StatsNotUpdatedIfNoFieldTrial) { | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackDisabled, EnteredLowResolutionSetIfAtMaxPixels) { | 
 |   InsertEncodedFrames(1, kFrameIntervalMs); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, EnteredLowResolutionNotSetIfNotLibvpx) { | 
 |   InsertEncodedFrames(1, kFrameIntervalMs); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, EnteredLowResolutionSetIfLibvpx) { | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(1, kFrameIntervalMs); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackDisabled, EnteredLowResolutionNotSetIfAboveMaxPixels) { | 
 |   encoded_image_._encodedWidth = kWidth + 1; | 
 |   InsertEncodedFrames(1, kFrameIntervalMs); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackDisabled, EnteredLowResolutionNotSetIfLibvpx) { | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(1, kFrameIntervalMs); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackDisabled, | 
 |        EnteredLowResolutionSetIfOnMinPixelLimitReached) { | 
 |   encoded_image_._encodedWidth = kWidth + 1; | 
 |   statistics_proxy_->OnMinPixelLimitReached(); | 
 |   InsertEncodedFrames(1, kFrameIntervalMs); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, OneFallbackEvent) { | 
 |   // One change. Video: 20000 ms, fallback: 5000 ms (25%). | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   InsertEncodedFrames(15, 1000); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(5, 1000); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents(kPrefix + "FallbackTimeInPercent.Vp8", 25)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents(kPrefix + "FallbackChangesPerMinute.Vp8", 3)); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, ThreeFallbackEvents) { | 
 |   codec_info_.codecSpecific.VP8.temporalIdx = kNoTemporalIdx;  // Should work. | 
 |   const int kMaxFrameDiffMs = 2000; | 
 |  | 
 |   // Three changes. Video: 60000 ms, fallback: 15000 ms (25%). | 
 |   InsertEncodedFrames(10, 1000); | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(15, 500); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   codec_name_ = "notlibvpx"; | 
 |   InsertEncodedFrames(20, 1000); | 
 |   InsertEncodedFrames(3, kMaxFrameDiffMs);  // Should not be included. | 
 |   InsertEncodedFrames(10, 1000); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   codec_name_ = "notlibvpx2"; | 
 |   InsertEncodedFrames(10, 500); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(15, 500); | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |  | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents(kPrefix + "FallbackTimeInPercent.Vp8", 25)); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumEvents(kPrefix + "FallbackChangesPerMinute.Vp8", 3)); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, NoFallbackIfAboveMaxPixels) { | 
 |   encoded_image_._encodedWidth = kWidth + 1; | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |  | 
 |   EXPECT_FALSE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(0, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       0, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | TEST_F(ForcedFallbackEnabled, FallbackIfAtMaxPixels) { | 
 |   encoded_image_._encodedWidth = kWidth; | 
 |   codec_name_ = "libvpx"; | 
 |   InsertEncodedFrames(kMinFrames, kFrameIntervalMs); | 
 |  | 
 |   EXPECT_TRUE(statistics_proxy_->GetStats().has_entered_low_resolution); | 
 |   statistics_proxy_.reset(); | 
 |   EXPECT_METRIC_EQ(1, | 
 |                    metrics::NumSamples(kPrefix + "FallbackTimeInPercent.Vp8")); | 
 |   EXPECT_METRIC_EQ( | 
 |       1, metrics::NumSamples(kPrefix + "FallbackChangesPerMinute.Vp8")); | 
 | } | 
 |  | 
 | }  // namespace webrtc |