andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include <math.h> |
| 12 | #include <algorithm> |
| 13 | |
| 14 | #include "gtest/gtest.h" |
| 15 | #include "video_engine/stream_synchronization.h" |
| 16 | |
| 17 | namespace webrtc { |
| 18 | |
| 19 | // These correspond to the same constants defined in vie_sync_module.cc. |
| 20 | enum { kMaxVideoDiffMs = 80 }; |
| 21 | enum { kMaxAudioDiffMs = 80 }; |
| 22 | enum { kMaxDelay = 1500 }; |
| 23 | |
| 24 | // Test constants. |
| 25 | enum { kDefaultAudioFrequency = 8000 }; |
| 26 | enum { kDefaultVideoFrequency = 90000 }; |
| 27 | const double kNtpFracPerMs = 4.294967296E6; |
| 28 | |
| 29 | class Time { |
| 30 | public: |
| 31 | explicit Time(int64_t offset) |
| 32 | : kNtpJan1970(2208988800UL), |
| 33 | time_now_ms_(offset) {} |
| 34 | |
| 35 | synchronization::RtcpMeasurement GenerateRtcp(int frequency, |
| 36 | uint32_t offset) const { |
| 37 | synchronization::RtcpMeasurement rtcp; |
| 38 | NowNtp(&rtcp.ntp_secs, &rtcp.ntp_frac); |
| 39 | rtcp.rtp_timestamp = NowRtp(frequency, offset); |
| 40 | return rtcp; |
| 41 | } |
| 42 | |
| 43 | void NowNtp(uint32_t* ntp_secs, uint32_t* ntp_frac) const { |
| 44 | *ntp_secs = time_now_ms_ / 1000 + kNtpJan1970; |
| 45 | int64_t remainder_ms = time_now_ms_ % 1000; |
| 46 | *ntp_frac = static_cast<uint32_t>( |
| 47 | static_cast<double>(remainder_ms) * kNtpFracPerMs + 0.5); |
| 48 | } |
| 49 | |
| 50 | uint32_t NowRtp(int frequency, uint32_t offset) const { |
| 51 | return frequency * time_now_ms_ / 1000 + offset; |
| 52 | } |
| 53 | |
| 54 | void IncreaseTimeMs(int64_t inc) { |
| 55 | time_now_ms_ += inc; |
| 56 | } |
| 57 | |
| 58 | int64_t time_now_ms() const { |
| 59 | return time_now_ms_; |
| 60 | } |
| 61 | |
| 62 | private: |
| 63 | // January 1970, in NTP seconds. |
| 64 | const uint32_t kNtpJan1970; |
| 65 | int64_t time_now_ms_; |
| 66 | }; |
| 67 | |
| 68 | class StreamSynchronizationTest : public ::testing::Test { |
| 69 | protected: |
| 70 | virtual void SetUp() { |
| 71 | sync_ = new StreamSynchronization(0, 0); |
| 72 | send_time_ = new Time(kSendTimeOffsetMs); |
| 73 | receive_time_ = new Time(kReceiveTimeOffsetMs); |
| 74 | audio_clock_drift_ = 1.0; |
| 75 | video_clock_drift_ = 1.0; |
| 76 | } |
| 77 | |
| 78 | virtual void TearDown() { |
| 79 | delete sync_; |
| 80 | delete send_time_; |
| 81 | delete receive_time_; |
| 82 | } |
| 83 | |
| 84 | // Generates the necessary RTCP measurements and RTP timestamps and computes |
| 85 | // the audio and video delays needed to get the two streams in sync. |
| 86 | // |audio_delay_ms| and |video_delay_ms| are the number of milliseconds after |
| 87 | // capture which the frames are rendered. |
| 88 | // |current_audio_delay_ms| is the number of milliseconds which audio is |
| 89 | // currently being delayed by the receiver. |
| 90 | bool DelayedStreams(int audio_delay_ms, |
| 91 | int video_delay_ms, |
| 92 | int current_audio_delay_ms, |
| 93 | int* extra_audio_delay_ms, |
| 94 | int* total_video_delay_ms) { |
| 95 | int audio_frequency = static_cast<int>(kDefaultAudioFrequency * |
| 96 | audio_clock_drift_ + 0.5); |
| 97 | int audio_offset = 0; |
| 98 | int video_frequency = static_cast<int>(kDefaultVideoFrequency * |
| 99 | video_clock_drift_ + 0.5); |
| 100 | int video_offset = 0; |
| 101 | StreamSynchronization::Measurements audio; |
| 102 | StreamSynchronization::Measurements video; |
| 103 | // Generate NTP/RTP timestamp pair for both streams corresponding to RTCP. |
| 104 | audio.rtcp.push_front(send_time_->GenerateRtcp(audio_frequency, |
| 105 | audio_offset)); |
| 106 | send_time_->IncreaseTimeMs(100); |
| 107 | receive_time_->IncreaseTimeMs(100); |
| 108 | video.rtcp.push_front(send_time_->GenerateRtcp(video_frequency, |
| 109 | video_offset)); |
| 110 | send_time_->IncreaseTimeMs(900); |
| 111 | receive_time_->IncreaseTimeMs(900); |
| 112 | audio.rtcp.push_front(send_time_->GenerateRtcp(audio_frequency, |
| 113 | audio_offset)); |
| 114 | send_time_->IncreaseTimeMs(100); |
| 115 | receive_time_->IncreaseTimeMs(100); |
| 116 | video.rtcp.push_front(send_time_->GenerateRtcp(video_frequency, |
| 117 | video_offset)); |
| 118 | send_time_->IncreaseTimeMs(900); |
| 119 | receive_time_->IncreaseTimeMs(900); |
| 120 | |
| 121 | // Capture an audio and a video frame at the same time. |
| 122 | audio.latest_timestamp = send_time_->NowRtp(audio_frequency, |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 123 | audio_offset); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 124 | video.latest_timestamp = send_time_->NowRtp(video_frequency, |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 125 | video_offset); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 126 | |
| 127 | if (audio_delay_ms > video_delay_ms) { |
| 128 | // Audio later than video. |
| 129 | receive_time_->IncreaseTimeMs(video_delay_ms); |
| 130 | video.latest_receive_time_ms = receive_time_->time_now_ms(); |
| 131 | receive_time_->IncreaseTimeMs(audio_delay_ms - video_delay_ms); |
| 132 | audio.latest_receive_time_ms = receive_time_->time_now_ms(); |
| 133 | } else { |
| 134 | // Video later than audio. |
| 135 | receive_time_->IncreaseTimeMs(audio_delay_ms); |
| 136 | audio.latest_receive_time_ms = receive_time_->time_now_ms(); |
| 137 | receive_time_->IncreaseTimeMs(video_delay_ms - audio_delay_ms); |
| 138 | video.latest_receive_time_ms = receive_time_->time_now_ms(); |
| 139 | } |
| 140 | int relative_delay_ms; |
| 141 | StreamSynchronization::ComputeRelativeDelay(audio, video, |
| 142 | &relative_delay_ms); |
| 143 | EXPECT_EQ(video_delay_ms - audio_delay_ms, relative_delay_ms); |
| 144 | return sync_->ComputeDelays(relative_delay_ms, |
| 145 | current_audio_delay_ms, |
| 146 | extra_audio_delay_ms, |
| 147 | total_video_delay_ms); |
| 148 | } |
| 149 | |
| 150 | // Simulate audio playback 300 ms after capture and video rendering 100 ms |
| 151 | // after capture. Verify that the correct extra delays are calculated for |
| 152 | // audio and video, and that they change correctly when we simulate that |
| 153 | // NetEQ or the VCM adds more delay to the streams. |
| 154 | // TODO(holmer): This is currently wrong! We should simply change |
| 155 | // audio_delay_ms or video_delay_ms since those now include VCM and NetEQ |
| 156 | // delays. |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 157 | void BothDelayedAudioLaterTest(int base_target_delay) { |
| 158 | int current_audio_delay_ms = base_target_delay; |
| 159 | int audio_delay_ms = base_target_delay + 300; |
| 160 | int video_delay_ms = base_target_delay + 100; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 161 | int extra_audio_delay_ms = 0; |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 162 | int total_video_delay_ms = base_target_delay; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 163 | |
| 164 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 165 | video_delay_ms, |
| 166 | current_audio_delay_ms, |
| 167 | &extra_audio_delay_ms, |
| 168 | &total_video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 169 | EXPECT_EQ(base_target_delay + kMaxVideoDiffMs, total_video_delay_ms); |
| 170 | EXPECT_EQ(base_target_delay, extra_audio_delay_ms); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 171 | current_audio_delay_ms = extra_audio_delay_ms; |
| 172 | |
| 173 | send_time_->IncreaseTimeMs(1000); |
| 174 | receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, |
| 175 | video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 176 | // Simulate base_target_delay minimum delay in the VCM. |
| 177 | total_video_delay_ms = base_target_delay; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 178 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 179 | video_delay_ms, |
| 180 | current_audio_delay_ms, |
| 181 | &extra_audio_delay_ms, |
| 182 | &total_video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 183 | EXPECT_EQ(base_target_delay + 2 * kMaxVideoDiffMs, total_video_delay_ms); |
| 184 | EXPECT_EQ(base_target_delay, extra_audio_delay_ms); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 185 | current_audio_delay_ms = extra_audio_delay_ms; |
| 186 | |
| 187 | send_time_->IncreaseTimeMs(1000); |
| 188 | receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, |
| 189 | video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 190 | // Simulate base_target_delay minimum delay in the VCM. |
| 191 | total_video_delay_ms = base_target_delay; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 192 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 193 | video_delay_ms, |
| 194 | current_audio_delay_ms, |
| 195 | &extra_audio_delay_ms, |
| 196 | &total_video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 197 | EXPECT_EQ(base_target_delay + audio_delay_ms - video_delay_ms, |
| 198 | total_video_delay_ms); |
| 199 | EXPECT_EQ(base_target_delay, extra_audio_delay_ms); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 200 | |
| 201 | // Simulate that NetEQ introduces some audio delay. |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 202 | current_audio_delay_ms = base_target_delay + 50; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 203 | send_time_->IncreaseTimeMs(1000); |
| 204 | receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, |
| 205 | video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 206 | // Simulate base_target_delay minimum delay in the VCM. |
| 207 | total_video_delay_ms = base_target_delay; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 208 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 209 | video_delay_ms, |
| 210 | current_audio_delay_ms, |
| 211 | &extra_audio_delay_ms, |
| 212 | &total_video_delay_ms)); |
| 213 | EXPECT_EQ(audio_delay_ms - video_delay_ms + current_audio_delay_ms, |
| 214 | total_video_delay_ms); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 215 | EXPECT_EQ(base_target_delay, extra_audio_delay_ms); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 216 | |
| 217 | // Simulate that NetEQ reduces its delay. |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 218 | current_audio_delay_ms = base_target_delay + 10; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 219 | send_time_->IncreaseTimeMs(1000); |
| 220 | receive_time_->IncreaseTimeMs(1000 - std::max(audio_delay_ms, |
| 221 | video_delay_ms)); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 222 | // Simulate base_target_delay minimum delay in the VCM. |
| 223 | total_video_delay_ms = base_target_delay; |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 224 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 225 | video_delay_ms, |
| 226 | current_audio_delay_ms, |
| 227 | &extra_audio_delay_ms, |
| 228 | &total_video_delay_ms)); |
| 229 | EXPECT_EQ(audio_delay_ms - video_delay_ms + current_audio_delay_ms, |
| 230 | total_video_delay_ms); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 231 | EXPECT_EQ(base_target_delay, extra_audio_delay_ms); |
| 232 | } |
| 233 | |
| 234 | void BothDelayedVideoLaterTest(int base_target_delay) { |
| 235 | int current_audio_delay_ms = base_target_delay; |
| 236 | int audio_delay_ms = base_target_delay + 100; |
| 237 | int video_delay_ms = base_target_delay + 300; |
| 238 | int extra_audio_delay_ms = 0; |
| 239 | int total_video_delay_ms = base_target_delay; |
| 240 | |
| 241 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 242 | video_delay_ms, |
| 243 | current_audio_delay_ms, |
| 244 | &extra_audio_delay_ms, |
| 245 | &total_video_delay_ms)); |
| 246 | EXPECT_EQ(base_target_delay, total_video_delay_ms); |
| 247 | // The audio delay is not allowed to change more than this in 1 second. |
| 248 | EXPECT_EQ(base_target_delay + kMaxAudioDiffMs, extra_audio_delay_ms); |
| 249 | current_audio_delay_ms = extra_audio_delay_ms; |
| 250 | int current_extra_delay_ms = extra_audio_delay_ms; |
| 251 | |
| 252 | send_time_->IncreaseTimeMs(1000); |
| 253 | receive_time_->IncreaseTimeMs(800); |
| 254 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 255 | video_delay_ms, |
| 256 | current_audio_delay_ms, |
| 257 | &extra_audio_delay_ms, |
| 258 | &total_video_delay_ms)); |
| 259 | EXPECT_EQ(base_target_delay, total_video_delay_ms); |
| 260 | // The audio delay is not allowed to change more than the half of the |
| 261 | // required change in delay. |
| 262 | EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( |
| 263 | current_audio_delay_ms, |
| 264 | base_target_delay + video_delay_ms - audio_delay_ms), |
| 265 | extra_audio_delay_ms); |
| 266 | current_audio_delay_ms = extra_audio_delay_ms; |
| 267 | current_extra_delay_ms = extra_audio_delay_ms; |
| 268 | |
| 269 | send_time_->IncreaseTimeMs(1000); |
| 270 | receive_time_->IncreaseTimeMs(800); |
| 271 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 272 | video_delay_ms, |
| 273 | current_audio_delay_ms, |
| 274 | &extra_audio_delay_ms, |
| 275 | &total_video_delay_ms)); |
| 276 | EXPECT_EQ(base_target_delay, total_video_delay_ms); |
| 277 | // The audio delay is not allowed to change more than the half of the |
| 278 | // required change in delay. |
| 279 | EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( |
| 280 | current_audio_delay_ms, |
| 281 | base_target_delay + video_delay_ms - audio_delay_ms), |
| 282 | extra_audio_delay_ms); |
| 283 | current_extra_delay_ms = extra_audio_delay_ms; |
| 284 | |
| 285 | // Simulate that NetEQ for some reason reduced the delay. |
| 286 | current_audio_delay_ms = base_target_delay + 170; |
| 287 | send_time_->IncreaseTimeMs(1000); |
| 288 | receive_time_->IncreaseTimeMs(800); |
| 289 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 290 | video_delay_ms, |
| 291 | current_audio_delay_ms, |
| 292 | &extra_audio_delay_ms, |
| 293 | &total_video_delay_ms)); |
| 294 | EXPECT_EQ(base_target_delay, total_video_delay_ms); |
| 295 | // Since we only can ask NetEQ for a certain amount of extra delay, and |
| 296 | // we only measure the total NetEQ delay, we will ask for additional delay |
| 297 | // here to try to stay in sync. |
| 298 | EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( |
| 299 | current_audio_delay_ms, |
| 300 | base_target_delay + video_delay_ms - audio_delay_ms), |
| 301 | extra_audio_delay_ms); |
| 302 | current_extra_delay_ms = extra_audio_delay_ms; |
| 303 | |
| 304 | // Simulate that NetEQ for some reason significantly increased the delay. |
| 305 | current_audio_delay_ms = base_target_delay + 250; |
| 306 | send_time_->IncreaseTimeMs(1000); |
| 307 | receive_time_->IncreaseTimeMs(800); |
| 308 | EXPECT_TRUE(DelayedStreams(audio_delay_ms, |
| 309 | video_delay_ms, |
| 310 | current_audio_delay_ms, |
| 311 | &extra_audio_delay_ms, |
| 312 | &total_video_delay_ms)); |
| 313 | EXPECT_EQ(base_target_delay, total_video_delay_ms); |
| 314 | // The audio delay is not allowed to change more than the half of the |
| 315 | // required change in delay. |
| 316 | EXPECT_EQ(current_extra_delay_ms + MaxAudioDelayIncrease( |
| 317 | current_audio_delay_ms, |
| 318 | base_target_delay + video_delay_ms - audio_delay_ms), |
| 319 | extra_audio_delay_ms); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | int MaxAudioDelayIncrease(int current_audio_delay_ms, int delay_ms) { |
| 323 | return std::min((delay_ms - current_audio_delay_ms) / 2, |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 324 | static_cast<int>(kMaxAudioDiffMs)); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | int MaxAudioDelayDecrease(int current_audio_delay_ms, int delay_ms) { |
| 328 | return std::max((delay_ms - current_audio_delay_ms) / 2, -kMaxAudioDiffMs); |
| 329 | } |
| 330 | |
| 331 | enum { kSendTimeOffsetMs = 98765 }; |
| 332 | enum { kReceiveTimeOffsetMs = 43210 }; |
| 333 | |
| 334 | StreamSynchronization* sync_; |
| 335 | Time* send_time_; // The simulated clock at the sender. |
| 336 | Time* receive_time_; // The simulated clock at the receiver. |
| 337 | double audio_clock_drift_; |
| 338 | double video_clock_drift_; |
| 339 | }; |
| 340 | |
| 341 | TEST_F(StreamSynchronizationTest, NoDelay) { |
| 342 | uint32_t current_audio_delay_ms = 0; |
| 343 | int extra_audio_delay_ms = 0; |
| 344 | int total_video_delay_ms = 0; |
| 345 | |
| 346 | EXPECT_TRUE(DelayedStreams(0, 0, current_audio_delay_ms, |
| 347 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 348 | EXPECT_EQ(0, extra_audio_delay_ms); |
| 349 | EXPECT_EQ(0, total_video_delay_ms); |
| 350 | } |
| 351 | |
| 352 | TEST_F(StreamSynchronizationTest, VideoDelay) { |
| 353 | uint32_t current_audio_delay_ms = 0; |
| 354 | int delay_ms = 200; |
| 355 | int extra_audio_delay_ms = 0; |
| 356 | int total_video_delay_ms = 0; |
| 357 | |
| 358 | EXPECT_TRUE(DelayedStreams(delay_ms, 0, current_audio_delay_ms, |
| 359 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 360 | EXPECT_EQ(0, extra_audio_delay_ms); |
| 361 | // The video delay is not allowed to change more than this in 1 second. |
| 362 | EXPECT_EQ(kMaxVideoDiffMs, total_video_delay_ms); |
| 363 | |
| 364 | send_time_->IncreaseTimeMs(1000); |
| 365 | receive_time_->IncreaseTimeMs(800); |
| 366 | // Simulate 0 minimum delay in the VCM. |
| 367 | total_video_delay_ms = 0; |
| 368 | EXPECT_TRUE(DelayedStreams(delay_ms, 0, current_audio_delay_ms, |
| 369 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 370 | EXPECT_EQ(0, extra_audio_delay_ms); |
| 371 | // The video delay is not allowed to change more than this in 1 second. |
| 372 | EXPECT_EQ(2*kMaxVideoDiffMs, total_video_delay_ms); |
| 373 | |
| 374 | send_time_->IncreaseTimeMs(1000); |
| 375 | receive_time_->IncreaseTimeMs(800); |
| 376 | // Simulate 0 minimum delay in the VCM. |
| 377 | total_video_delay_ms = 0; |
| 378 | EXPECT_TRUE(DelayedStreams(delay_ms, 0, current_audio_delay_ms, |
| 379 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 380 | EXPECT_EQ(0, extra_audio_delay_ms); |
| 381 | // Enough time should have elapsed for the requested total video delay to be |
| 382 | // equal to the relative delay between audio and video, i.e., we are in sync. |
| 383 | EXPECT_EQ(delay_ms, total_video_delay_ms); |
| 384 | } |
| 385 | |
| 386 | TEST_F(StreamSynchronizationTest, AudioDelay) { |
| 387 | int current_audio_delay_ms = 0; |
| 388 | int delay_ms = 200; |
| 389 | int extra_audio_delay_ms = 0; |
| 390 | int total_video_delay_ms = 0; |
| 391 | |
| 392 | EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, |
| 393 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 394 | EXPECT_EQ(0, total_video_delay_ms); |
| 395 | // The audio delay is not allowed to change more than this in 1 second. |
| 396 | EXPECT_EQ(kMaxAudioDiffMs, extra_audio_delay_ms); |
| 397 | current_audio_delay_ms = extra_audio_delay_ms; |
| 398 | int current_extra_delay_ms = extra_audio_delay_ms; |
| 399 | |
| 400 | send_time_->IncreaseTimeMs(1000); |
| 401 | receive_time_->IncreaseTimeMs(800); |
| 402 | EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, |
| 403 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 404 | EXPECT_EQ(0, total_video_delay_ms); |
| 405 | // The audio delay is not allowed to change more than the half of the required |
| 406 | // change in delay. |
| 407 | EXPECT_EQ(current_extra_delay_ms + |
| 408 | MaxAudioDelayIncrease(current_audio_delay_ms, delay_ms), |
| 409 | extra_audio_delay_ms); |
| 410 | current_audio_delay_ms = extra_audio_delay_ms; |
| 411 | current_extra_delay_ms = extra_audio_delay_ms; |
| 412 | |
| 413 | send_time_->IncreaseTimeMs(1000); |
| 414 | receive_time_->IncreaseTimeMs(800); |
| 415 | EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, |
| 416 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 417 | EXPECT_EQ(0, total_video_delay_ms); |
| 418 | // The audio delay is not allowed to change more than the half of the required |
| 419 | // change in delay. |
| 420 | EXPECT_EQ(current_extra_delay_ms + |
| 421 | MaxAudioDelayIncrease(current_audio_delay_ms, delay_ms), |
| 422 | extra_audio_delay_ms); |
| 423 | current_extra_delay_ms = extra_audio_delay_ms; |
| 424 | |
| 425 | // Simulate that NetEQ for some reason reduced the delay. |
| 426 | current_audio_delay_ms = 170; |
| 427 | send_time_->IncreaseTimeMs(1000); |
| 428 | receive_time_->IncreaseTimeMs(800); |
| 429 | EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, |
| 430 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 431 | EXPECT_EQ(0, total_video_delay_ms); |
| 432 | // Since we only can ask NetEQ for a certain amount of extra delay, and |
| 433 | // we only measure the total NetEQ delay, we will ask for additional delay |
| 434 | // here to try to |
| 435 | EXPECT_EQ(current_extra_delay_ms + |
| 436 | MaxAudioDelayIncrease(current_audio_delay_ms, delay_ms), |
| 437 | extra_audio_delay_ms); |
| 438 | current_extra_delay_ms = extra_audio_delay_ms; |
| 439 | |
| 440 | // Simulate that NetEQ for some reason significantly increased the delay. |
| 441 | current_audio_delay_ms = 250; |
| 442 | send_time_->IncreaseTimeMs(1000); |
| 443 | receive_time_->IncreaseTimeMs(800); |
| 444 | EXPECT_TRUE(DelayedStreams(0, delay_ms, current_audio_delay_ms, |
| 445 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 446 | EXPECT_EQ(0, total_video_delay_ms); |
| 447 | // The audio delay is not allowed to change more than the half of the required |
| 448 | // change in delay. |
| 449 | EXPECT_EQ(current_extra_delay_ms + |
| 450 | MaxAudioDelayDecrease(current_audio_delay_ms, delay_ms), |
| 451 | extra_audio_delay_ms); |
| 452 | } |
| 453 | |
| 454 | TEST_F(StreamSynchronizationTest, BothDelayedVideoLater) { |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 455 | BothDelayedVideoLaterTest(0); |
| 456 | } |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 457 | |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 458 | TEST_F(StreamSynchronizationTest, BothDelayedVideoLaterAudioClockDrift) { |
| 459 | audio_clock_drift_ = 1.05; |
| 460 | BothDelayedVideoLaterTest(0); |
| 461 | } |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 462 | |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 463 | TEST_F(StreamSynchronizationTest, BothDelayedVideoLaterVideoClockDrift) { |
| 464 | video_clock_drift_ = 1.05; |
| 465 | BothDelayedVideoLaterTest(0); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | TEST_F(StreamSynchronizationTest, BothDelayedAudioLater) { |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 469 | BothDelayedAudioLaterTest(0); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | TEST_F(StreamSynchronizationTest, BothDelayedAudioClockDrift) { |
| 473 | audio_clock_drift_ = 1.05; |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 474 | BothDelayedAudioLaterTest(0); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | TEST_F(StreamSynchronizationTest, BothDelayedVideoClockDrift) { |
| 478 | video_clock_drift_ = 1.05; |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 479 | BothDelayedAudioLaterTest(0); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 480 | } |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 481 | |
| 482 | TEST_F(StreamSynchronizationTest, BaseDelay) { |
| 483 | int base_target_delay_ms = 2000; |
| 484 | int current_audio_delay_ms = 2000; |
| 485 | int extra_audio_delay_ms = 0; |
| 486 | int total_video_delay_ms = base_target_delay_ms; |
| 487 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 488 | EXPECT_TRUE(DelayedStreams(base_target_delay_ms, base_target_delay_ms, |
| 489 | current_audio_delay_ms, |
| 490 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 491 | EXPECT_EQ(base_target_delay_ms, extra_audio_delay_ms); |
| 492 | EXPECT_EQ(base_target_delay_ms, total_video_delay_ms); |
mikhal@webrtc.org | ca65c51 | 2013-02-22 19:30:44 +0000 | [diff] [blame] | 493 | // Triggering another call with the same values. Delay should not be modified. |
| 494 | base_target_delay_ms = 2000; |
| 495 | current_audio_delay_ms = base_target_delay_ms; |
| 496 | total_video_delay_ms = base_target_delay_ms; |
| 497 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 498 | EXPECT_TRUE(DelayedStreams(base_target_delay_ms, base_target_delay_ms, |
| 499 | current_audio_delay_ms, |
| 500 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 501 | EXPECT_EQ(base_target_delay_ms, extra_audio_delay_ms); |
| 502 | EXPECT_EQ(base_target_delay_ms, total_video_delay_ms); |
| 503 | // Changing delay value - intended to test this module only. In practice it |
| 504 | // would take VoE time to adapt. |
| 505 | base_target_delay_ms = 5000; |
| 506 | current_audio_delay_ms = base_target_delay_ms; |
| 507 | total_video_delay_ms = base_target_delay_ms; |
| 508 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 509 | EXPECT_TRUE(DelayedStreams(base_target_delay_ms, base_target_delay_ms, |
| 510 | current_audio_delay_ms, |
| 511 | &extra_audio_delay_ms, &total_video_delay_ms)); |
| 512 | EXPECT_EQ(base_target_delay_ms, extra_audio_delay_ms); |
| 513 | EXPECT_EQ(base_target_delay_ms, total_video_delay_ms); |
mikhal@webrtc.org | 4db69af | 2013-02-15 23:22:18 +0000 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | TEST_F(StreamSynchronizationTest, BothDelayedAudioLaterWithBaseDelay) { |
| 517 | int base_target_delay_ms = 3000; |
| 518 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 519 | BothDelayedAudioLaterTest(base_target_delay_ms); |
| 520 | } |
| 521 | |
| 522 | TEST_F(StreamSynchronizationTest, BothDelayedAudioClockDriftWithBaseDelay) { |
| 523 | int base_target_delay_ms = 3000; |
| 524 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 525 | audio_clock_drift_ = 1.05; |
| 526 | BothDelayedAudioLaterTest(base_target_delay_ms); |
| 527 | } |
| 528 | |
| 529 | TEST_F(StreamSynchronizationTest, BothDelayedVideoClockDriftWithBaseDelay) { |
| 530 | int base_target_delay_ms = 3000; |
| 531 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 532 | video_clock_drift_ = 1.05; |
| 533 | BothDelayedAudioLaterTest(base_target_delay_ms); |
| 534 | } |
| 535 | |
| 536 | TEST_F(StreamSynchronizationTest, BothDelayedVideoLaterWithBaseDelay) { |
| 537 | int base_target_delay_ms = 2000; |
| 538 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 539 | BothDelayedVideoLaterTest(base_target_delay_ms); |
| 540 | } |
| 541 | |
| 542 | TEST_F(StreamSynchronizationTest, |
| 543 | BothDelayedVideoLaterAudioClockDriftWithBaseDelay) { |
| 544 | int base_target_delay_ms = 2000; |
| 545 | audio_clock_drift_ = 1.05; |
| 546 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 547 | BothDelayedVideoLaterTest(base_target_delay_ms); |
| 548 | } |
| 549 | |
| 550 | TEST_F(StreamSynchronizationTest, |
| 551 | BothDelayedVideoLaterVideoClockDriftWithBaseDelay) { |
| 552 | int base_target_delay_ms = 2000; |
| 553 | video_clock_drift_ = 1.05; |
| 554 | sync_->SetTargetBufferingDelay(base_target_delay_ms); |
| 555 | BothDelayedVideoLaterTest(base_target_delay_ms); |
| 556 | } |
| 557 | |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 558 | } // namespace webrtc |