diff options
Diffstat (limited to 'webrtc/video/stream_synchronization_unittest.cc')
| -rw-r--r-- | webrtc/video/stream_synchronization_unittest.cc | 563 |
1 files changed, 563 insertions, 0 deletions
diff --git a/webrtc/video/stream_synchronization_unittest.cc b/webrtc/video/stream_synchronization_unittest.cc new file mode 100644 index 0000000000..2834dfe1b2 --- /dev/null +++ b/webrtc/video/stream_synchronization_unittest.cc @@ -0,0 +1,563 @@ +/* + * Copyright (c) 2012 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 <math.h> + +#include <algorithm> + +#include "testing/gtest/include/gtest/gtest.h" +#include "webrtc/video/stream_synchronization.h" + +namespace webrtc { + +// These correspond to the same constants defined in vie_sync_module.cc. +enum { kMaxVideoDiffMs = 80 }; +enum { kMaxAudioDiffMs = 80 }; +enum { kMaxDelay = 1500 }; + +// Test constants. +enum { kDefaultAudioFrequency = 8000 }; +enum { kDefaultVideoFrequency = 90000 }; +const double kNtpFracPerMs = 4.294967296E6; +static const int kSmoothingFilter = 4 * 2; + +class Time { + public: + explicit Time(int64_t offset) + : kNtpJan1970(2208988800UL), + time_now_ms_(offset) {} + + RtcpMeasurement GenerateRtcp(int frequency, uint32_t offset) const { + RtcpMeasurement rtcp; + NowNtp(&rtcp.ntp_secs, &rtcp.ntp_frac); + rtcp.rtp_timestamp = NowRtp(frequency, offset); + return rtcp; + } + + void NowNtp(uint32_t* ntp_secs, uint32_t* ntp_frac) const { + *ntp_secs = time_now_ms_ / 1000 + kNtpJan1970; + int64_t remainder_ms = time_now_ms_ % 1000; + *ntp_frac = static_cast<uint32_t>( + static_cast<double>(remainder_ms) * kNtpFracPerMs + 0.5); + } + + uint32_t NowRtp(int frequency, uint32_t offset) const { + return frequency * time_now_ms_ / 1000 + offset; + } + + void IncreaseTimeMs(int64_t inc) { + time_now_ms_ += inc; + } + + int64_t time_now_ms() const { + return time_now_ms_; + } + + private: + // January 1970, in NTP seconds. + const uint32_t kNtpJan1970; + int64_t time_now_ms_; +}; + +class StreamSynchronizationTest : public ::testing::Test { + protected: + virtual void SetUp() { + sync_ = new StreamSynchronization(0, 0); + send_time_ = new Time(kSendTimeOffsetMs); + receive_time_ = new Time(kReceiveTimeOffsetMs); + audio_clock_drift_ = 1.0; + video_clock_drift_ = 1.0; + } + + virtual void TearDown() { + delete sync_; + delete send_time_; + delete receive_time_; + } + + // Generates the necessary RTCP measurements and RTP timestamps and computes + // the audio and video delays needed to get the two streams in sync. + // |audio_delay_ms| and |video_delay_ms| are the number of milliseconds after + // capture which the frames are rendered. + // |current_audio_delay_ms| is the number of milliseconds which audio is + // currently being delayed by the receiver. + bool DelayedStreams(int audio_delay_ms, + int video_delay_ms, + int current_audio_delay_ms, + int* extra_audio_delay_ms, + int* total_video_delay_ms) { + int audio_frequency = static_cast<int>(kDefaultAudioFrequency * + audio_clock_drift_ + 0.5); + int audio_offset = 0; + int video_frequency = static_cast<int>(kDefaultVideoFrequency * + video_clock_drift_ + 0.5); + int video_offset = 0; + StreamSynchronization::Measurements audio; + StreamSynchronization::Measurements video; + // Generate NTP/RTP timestamp pair for both streams corresponding to RTCP. + audio.rtcp.push_front(send_time_->GenerateRtcp(audio_frequency, + audio_offset)); + send_time_->IncreaseTimeMs(100); + receive_time_->IncreaseTimeMs(100); + video.rtcp.push_front(send_time_->GenerateRtcp(video_frequency, + video_offset)); + send_time_->IncreaseTimeMs(900); + receive_time_->IncreaseTimeMs(900); + audio.rtcp.push_front(send_time_->GenerateRtcp(audio_frequency, + audio_offset)); + send_time_->IncreaseTimeMs(100); + receive_time_->IncreaseTimeMs(100); + video.rtcp.push_front(send_time_->GenerateRtcp(video_frequency, + video_offset)); + send_time_->IncreaseTimeMs(900); + receive_time_->IncreaseTimeMs(900); + + // Capture an audio and a video frame at the same time. + audio.latest_timestamp = send_time_->NowRtp(audio_frequency, + audio_offset); + video.latest_timestamp = send_time_->NowRtp(video_frequency, + video_offset); + + if (audio_delay_ms > video_delay_ms) { + // Audio later than video. + receive_time_->IncreaseTimeMs(video_delay_ms); + video.latest_receive_time_ms = receive_time_->time_now_ms(); + receive_time_->IncreaseTimeMs(audio_delay_ms - video_delay_ms); + audio.latest_receive_time_ms = receive_time_->time_now_ms(); + } else { + // Video later than audio. + receive_time_->IncreaseTimeMs(audio_delay_ms); + audio.latest_receive_time_ms = receive_time_->time_now_ms(); + receive_time_->IncreaseTimeMs(video_delay_ms - audio_delay_ms); + video.latest_receive_time_ms = receive_time_->time_now_ms(); + } + int relative_delay_ms; + StreamSynchronization::ComputeRelativeDelay(audio, video, + &relative_delay_ms); + EXPECT_EQ(video_delay_ms - audio_delay_ms, relative_delay_ms); + return sync_->ComputeDelays(relative_delay_ms, + current_audio_delay_ms, + extra_audio_delay_ms, + total_video_delay_ms); + } + + // Simulate audio playback 300 ms after capture and video rendering 100 ms + // after capture. Verify that the correct extra delays are calculated for + // audio and video, and that they change correctly when we simulate that + // NetEQ or the VCM adds more delay to the streams. + // TODO(holmer): This is currently wrong! We should simply change + // audio_delay_ms or video_delay_ms since those now include VCM and NetEQ + // delays. + void BothDelayedAudioLaterTest(int base_target_delay) { + int current_audio_delay_ms = base_target_delay; + int audio_delay_ms = base_target_delay + 300; + int video_delay_ms = base_target_delay + 100; + int extra_audio_delay_ms = 0; + int total_video_delay_ms = base_target_delay; + int filtered_move = (audio_delay_ms - video_delay_ms) / kSmoothingFilter; + const int kNeteqDelayIncrease = 50; + const int kNeteqDelayDecrease = 10; + + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay + filtered_move, total_video_delay_ms); + EXPECT_EQ(base_target_delay, extra_audio_delay_ms); + current_audio_delay_ms = extra_audio_delay_ms; + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, + video_delay_ms)); + // Simulate base_target_delay minimum delay in the VCM. + total_video_delay_ms = base_target_delay; + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay + 2 * filtered_move, total_video_delay_ms); + EXPECT_EQ(base_target_delay, extra_audio_delay_ms); + current_audio_delay_ms = extra_audio_delay_ms; + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, + video_delay_ms)); + // Simulate base_target_delay minimum delay in the VCM. + total_video_delay_ms = base_target_delay; + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay + 3 * filtered_move, total_video_delay_ms); + EXPECT_EQ(base_target_delay, extra_audio_delay_ms); + + // Simulate that NetEQ introduces some audio delay. + current_audio_delay_ms = base_target_delay + kNeteqDelayIncrease; + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, + video_delay_ms)); + // Simulate base_target_delay minimum delay in the VCM. + total_video_delay_ms = base_target_delay; + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + filtered_move = 3 * filtered_move + + (kNeteqDelayIncrease + audio_delay_ms - video_delay_ms) / + kSmoothingFilter; + EXPECT_EQ(base_target_delay + filtered_move, total_video_delay_ms); + EXPECT_EQ(base_target_delay, extra_audio_delay_ms); + + // Simulate that NetEQ reduces its delay. + current_audio_delay_ms = base_target_delay + kNeteqDelayDecrease; + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, + video_delay_ms)); + // Simulate base_target_delay minimum delay in the VCM. + total_video_delay_ms = base_target_delay; + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + + filtered_move = filtered_move + + (kNeteqDelayDecrease + audio_delay_ms - video_delay_ms) / + kSmoothingFilter; + + EXPECT_EQ(base_target_delay + filtered_move, total_video_delay_ms); + EXPECT_EQ(base_target_delay, extra_audio_delay_ms); + } + + void BothDelayedVideoLaterTest(int base_target_delay) { + int current_audio_delay_ms = base_target_delay; + int audio_delay_ms = base_target_delay + 100; + int video_delay_ms = base_target_delay + 300; + int extra_audio_delay_ms = 0; + int total_video_delay_ms = base_target_delay; + + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay, total_video_delay_ms); + // The audio delay is not allowed to change more than this in 1 second. + EXPECT_GE(base_target_delay + kMaxAudioDiffMs, extra_audio_delay_ms); + current_audio_delay_ms = extra_audio_delay_ms; + int current_extra_delay_ms = extra_audio_delay_ms; + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay, total_video_delay_ms); + // The audio delay is not allowed to change more than the half of the + // required change in delay. + EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( + current_audio_delay_ms, + base_target_delay + video_delay_ms - audio_delay_ms), + extra_audio_delay_ms); + current_audio_delay_ms = extra_audio_delay_ms; + current_extra_delay_ms = extra_audio_delay_ms; + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay, total_video_delay_ms); + // The audio delay is not allowed to change more than the half of the + // required change in delay. + EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( + current_audio_delay_ms, + base_target_delay + video_delay_ms - audio_delay_ms), + extra_audio_delay_ms); + current_extra_delay_ms = extra_audio_delay_ms; + + // Simulate that NetEQ for some reason reduced the delay. + current_audio_delay_ms = base_target_delay + 10; + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay, total_video_delay_ms); + // Since we only can ask NetEQ for a certain amount of extra delay, and + // we only measure the total NetEQ delay, we will ask for additional delay + // here to try to stay in sync. + EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( + current_audio_delay_ms, + base_target_delay + video_delay_ms - audio_delay_ms), + extra_audio_delay_ms); + current_extra_delay_ms = extra_audio_delay_ms; + + // Simulate that NetEQ for some reason significantly increased the delay. + current_audio_delay_ms = base_target_delay + 350; + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(audio_delay_ms, + video_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, + &total_video_delay_ms)); + EXPECT_EQ(base_target_delay, total_video_delay_ms); + // The audio delay is not allowed to change more than the half of the + // required change in delay. + EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( + current_audio_delay_ms, + base_target_delay + video_delay_ms - audio_delay_ms), + extra_audio_delay_ms); + } + + int MaxAudioDelayIncrease(int current_audio_delay_ms, int delay_ms) { + return std::min((delay_ms - current_audio_delay_ms) / kSmoothingFilter, + static_cast<int>(kMaxAudioDiffMs)); + } + + int MaxAudioDelayDecrease(int current_audio_delay_ms, int delay_ms) { + return std::max((delay_ms - current_audio_delay_ms) / kSmoothingFilter, + -kMaxAudioDiffMs); + } + + enum { kSendTimeOffsetMs = 98765 }; + enum { kReceiveTimeOffsetMs = 43210 }; + + StreamSynchronization* sync_; + Time* send_time_; // The simulated clock at the sender. + Time* receive_time_; // The simulated clock at the receiver. + double audio_clock_drift_; + double video_clock_drift_; +}; + +TEST_F(StreamSynchronizationTest, NoDelay) { + uint32_t current_audio_delay_ms = 0; + int extra_audio_delay_ms = 0; + int total_video_delay_ms = 0; + + EXPECT_FALSE(DelayedStreams(0, 0, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, extra_audio_delay_ms); + EXPECT_EQ(0, total_video_delay_ms); +} + +TEST_F(StreamSynchronizationTest, VideoDelay) { + uint32_t current_audio_delay_ms = 0; + int delay_ms = 200; + int extra_audio_delay_ms = 0; + int total_video_delay_ms = 0; + + EXPECT_TRUE(DelayedStreams(delay_ms, 0, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, extra_audio_delay_ms); + // The video delay is not allowed to change more than this in 1 second. + EXPECT_EQ(delay_ms / kSmoothingFilter, total_video_delay_ms); + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + // Simulate 0 minimum delay in the VCM. + total_video_delay_ms = 0; + EXPECT_TRUE(DelayedStreams(delay_ms, 0, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, extra_audio_delay_ms); + // The video delay is not allowed to change more than this in 1 second. + EXPECT_EQ(2 * delay_ms / kSmoothingFilter, total_video_delay_ms); + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + // Simulate 0 minimum delay in the VCM. + total_video_delay_ms = 0; + EXPECT_TRUE(DelayedStreams(delay_ms, 0, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, extra_audio_delay_ms); + EXPECT_EQ(3 * delay_ms / kSmoothingFilter, total_video_delay_ms); +} + +TEST_F(StreamSynchronizationTest, AudioDelay) { + int current_audio_delay_ms = 0; + int delay_ms = 200; + int extra_audio_delay_ms = 0; + int total_video_delay_ms = 0; + + EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, total_video_delay_ms); + // The audio delay is not allowed to change more than this in 1 second. + EXPECT_EQ(delay_ms / kSmoothingFilter, extra_audio_delay_ms); + current_audio_delay_ms = extra_audio_delay_ms; + int current_extra_delay_ms = extra_audio_delay_ms; + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, total_video_delay_ms); + // The audio delay is not allowed to change more than the half of the required + // change in delay. + EXPECT_EQ(current_extra_delay_ms + + MaxAudioDelayIncrease(current_audio_delay_ms, delay_ms), + extra_audio_delay_ms); + current_audio_delay_ms = extra_audio_delay_ms; + current_extra_delay_ms = extra_audio_delay_ms; + + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, total_video_delay_ms); + // The audio delay is not allowed to change more than the half of the required + // change in delay. + EXPECT_EQ(current_extra_delay_ms + + MaxAudioDelayIncrease(current_audio_delay_ms, delay_ms), + extra_audio_delay_ms); + current_extra_delay_ms = extra_audio_delay_ms; + + // Simulate that NetEQ for some reason reduced the delay. + current_audio_delay_ms = 10; + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, total_video_delay_ms); + // Since we only can ask NetEQ for a certain amount of extra delay, and + // we only measure the total NetEQ delay, we will ask for additional delay + // here to try to + EXPECT_EQ(current_extra_delay_ms + + MaxAudioDelayIncrease(current_audio_delay_ms, delay_ms), + extra_audio_delay_ms); + current_extra_delay_ms = extra_audio_delay_ms; + + // Simulate that NetEQ for some reason significantly increased the delay. + current_audio_delay_ms = 350; + send_time_->IncreaseTimeMs(1000); + receive_time_->IncreaseTimeMs(800); + EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + EXPECT_EQ(0, total_video_delay_ms); + // The audio delay is not allowed to change more than the half of the required + // change in delay. + EXPECT_EQ(current_extra_delay_ms + + MaxAudioDelayDecrease(current_audio_delay_ms, delay_ms), + extra_audio_delay_ms); +} + +TEST_F(StreamSynchronizationTest, BothDelayedVideoLater) { + BothDelayedVideoLaterTest(0); +} + +TEST_F(StreamSynchronizationTest, BothDelayedVideoLaterAudioClockDrift) { + audio_clock_drift_ = 1.05; + BothDelayedVideoLaterTest(0); +} + +TEST_F(StreamSynchronizationTest, BothDelayedVideoLaterVideoClockDrift) { + video_clock_drift_ = 1.05; + BothDelayedVideoLaterTest(0); +} + +TEST_F(StreamSynchronizationTest, BothDelayedAudioLater) { + BothDelayedAudioLaterTest(0); +} + +TEST_F(StreamSynchronizationTest, BothDelayedAudioClockDrift) { + audio_clock_drift_ = 1.05; + BothDelayedAudioLaterTest(0); +} + +TEST_F(StreamSynchronizationTest, BothDelayedVideoClockDrift) { + video_clock_drift_ = 1.05; + BothDelayedAudioLaterTest(0); +} + +TEST_F(StreamSynchronizationTest, BaseDelay) { + int base_target_delay_ms = 2000; + int current_audio_delay_ms = 2000; + int extra_audio_delay_ms = 0; + int total_video_delay_ms = base_target_delay_ms; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + // We are in sync don't change. + EXPECT_FALSE(DelayedStreams(base_target_delay_ms, base_target_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + // Triggering another call with the same values. Delay should not be modified. + base_target_delay_ms = 2000; + current_audio_delay_ms = base_target_delay_ms; + total_video_delay_ms = base_target_delay_ms; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + // We are in sync don't change. + EXPECT_FALSE(DelayedStreams(base_target_delay_ms, base_target_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); + // Changing delay value - intended to test this module only. In practice it + // would take VoE time to adapt. + base_target_delay_ms = 5000; + current_audio_delay_ms = base_target_delay_ms; + total_video_delay_ms = base_target_delay_ms; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + // We are in sync don't change. + EXPECT_FALSE(DelayedStreams(base_target_delay_ms, base_target_delay_ms, + current_audio_delay_ms, + &extra_audio_delay_ms, &total_video_delay_ms)); +} + +TEST_F(StreamSynchronizationTest, BothDelayedAudioLaterWithBaseDelay) { + int base_target_delay_ms = 3000; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + BothDelayedAudioLaterTest(base_target_delay_ms); +} + +TEST_F(StreamSynchronizationTest, BothDelayedAudioClockDriftWithBaseDelay) { + int base_target_delay_ms = 3000; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + audio_clock_drift_ = 1.05; + BothDelayedAudioLaterTest(base_target_delay_ms); +} + +TEST_F(StreamSynchronizationTest, BothDelayedVideoClockDriftWithBaseDelay) { + int base_target_delay_ms = 3000; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + video_clock_drift_ = 1.05; + BothDelayedAudioLaterTest(base_target_delay_ms); +} + +TEST_F(StreamSynchronizationTest, BothDelayedVideoLaterWithBaseDelay) { + int base_target_delay_ms = 2000; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + BothDelayedVideoLaterTest(base_target_delay_ms); +} + +TEST_F(StreamSynchronizationTest, + BothDelayedVideoLaterAudioClockDriftWithBaseDelay) { + int base_target_delay_ms = 2000; + audio_clock_drift_ = 1.05; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + BothDelayedVideoLaterTest(base_target_delay_ms); +} + +TEST_F(StreamSynchronizationTest, + BothDelayedVideoLaterVideoClockDriftWithBaseDelay) { + int base_target_delay_ms = 2000; + video_clock_drift_ = 1.05; + sync_->SetTargetBufferingDelay(base_target_delay_ms); + BothDelayedVideoLaterTest(base_target_delay_ms); +} + +} // namespace webrtc |