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| 1 /* |
| 2 * Copyright (c) 2015 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 <limits> |
| 12 #include <vector> |
| 13 |
| 14 #include "testing/gmock/include/gmock/gmock.h" |
| 15 #include "testing/gtest/include/gtest/gtest.h" |
| 16 |
| 17 #include "webrtc/base/checks.h" |
| 18 #include "webrtc/base/scoped_ptr.h" |
| 19 #include "webrtc/modules/remote_bitrate_estimator/include/mock/mock_remote_bitra
te_estimator.h" |
| 20 #include "webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.h" |
| 21 #include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h" |
| 22 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h" |
| 23 #include "webrtc/modules/utility/interface/mock/mock_process_thread.h" |
| 24 #include "webrtc/system_wrappers/interface/clock.h" |
| 25 |
| 26 using ::testing::_; |
| 27 using ::testing::Invoke; |
| 28 |
| 29 namespace webrtc { |
| 30 namespace test { |
| 31 |
| 32 class TransportFeedbackAdapterTest : public ::testing::Test { |
| 33 public: |
| 34 TransportFeedbackAdapterTest() |
| 35 : clock_(0), |
| 36 bitrate_estimator_(nullptr), |
| 37 receiver_estimated_bitrate_(0) {} |
| 38 |
| 39 virtual ~TransportFeedbackAdapterTest() {} |
| 40 |
| 41 virtual void SetUp() { |
| 42 adapter_.reset(new TransportFeedbackAdapter( |
| 43 new RtcpBandwidthObserverAdapter(this), &clock_, &process_thread_)); |
| 44 |
| 45 bitrate_estimator_ = new MockRemoteBitrateEstimator(); |
| 46 EXPECT_CALL(process_thread_, RegisterModule(bitrate_estimator_)).Times(1); |
| 47 adapter_->SetBitrateEstimator(bitrate_estimator_); |
| 48 } |
| 49 |
| 50 virtual void TearDown() { |
| 51 EXPECT_CALL(process_thread_, DeRegisterModule(bitrate_estimator_)).Times(1); |
| 52 adapter_.reset(); |
| 53 } |
| 54 |
| 55 protected: |
| 56 // Proxy class used since TransportFeedbackAdapter will own the instance |
| 57 // passed at construction. |
| 58 class RtcpBandwidthObserverAdapter : public RtcpBandwidthObserver { |
| 59 public: |
| 60 explicit RtcpBandwidthObserverAdapter(TransportFeedbackAdapterTest* owner) |
| 61 : owner_(owner) {} |
| 62 |
| 63 void OnReceivedEstimatedBitrate(uint32_t bitrate) override { |
| 64 owner_->receiver_estimated_bitrate_ = bitrate; |
| 65 } |
| 66 |
| 67 void OnReceivedRtcpReceiverReport(const ReportBlockList& report_blocks, |
| 68 int64_t rtt, |
| 69 int64_t now_ms) override { |
| 70 RTC_NOTREACHED(); |
| 71 } |
| 72 |
| 73 TransportFeedbackAdapterTest* const owner_; |
| 74 }; |
| 75 |
| 76 void OnReceivedEstimatedBitrate(uint32_t bitrate) {} |
| 77 |
| 78 void OnReceivedRtcpReceiverReport(const ReportBlockList& report_blocks, |
| 79 int64_t rtt, |
| 80 int64_t now_ms) {} |
| 81 |
| 82 void ComparePacketVectors(const std::vector<PacketInfo>& truth, |
| 83 const std::vector<PacketInfo>& input) { |
| 84 ASSERT_EQ(truth.size(), input.size()); |
| 85 size_t len = truth.size(); |
| 86 // truth contains the input data for the test, and input is what will be |
| 87 // sent to the bandwidth estimator. truth.arrival_tims_ms is used to |
| 88 // populate the transport feedback messages. As these times may be changed |
| 89 // (because of resolution limits in the packets, and because of the time |
| 90 // base adjustment performed by the TransportFeedbackAdapter at the first |
| 91 // packet, the truth[x].arrival_time and input[x].arrival_time may not be |
| 92 // equal. However, the difference must be the same for all x. |
| 93 int64_t arrival_time_delta = |
| 94 truth[0].arrival_time_ms - input[0].arrival_time_ms; |
| 95 for (size_t i = 0; i < len; ++i) { |
| 96 EXPECT_EQ(truth[i].arrival_time_ms, |
| 97 input[i].arrival_time_ms + arrival_time_delta); |
| 98 EXPECT_EQ(truth[i].send_time_ms, input[i].send_time_ms); |
| 99 EXPECT_EQ(truth[i].sequence_number, input[i].sequence_number); |
| 100 EXPECT_EQ(truth[i].payload_size, input[i].payload_size); |
| 101 EXPECT_EQ(truth[i].was_paced, input[i].was_paced); |
| 102 } |
| 103 } |
| 104 |
| 105 // Utility method, to reset arrival_time_ms before adding send time. |
| 106 void OnPacketSent(PacketInfo info) { |
| 107 info.arrival_time_ms = 0; |
| 108 adapter_->OnPacketSent(info); |
| 109 } |
| 110 |
| 111 SimulatedClock clock_; |
| 112 MockProcessThread process_thread_; |
| 113 MockRemoteBitrateEstimator* bitrate_estimator_; |
| 114 rtc::scoped_ptr<TransportFeedbackAdapter> adapter_; |
| 115 |
| 116 uint32_t receiver_estimated_bitrate_; |
| 117 }; |
| 118 |
| 119 TEST_F(TransportFeedbackAdapterTest, AdaptsFeedbackAndPopulatesSendTimes) { |
| 120 std::vector<PacketInfo> packets; |
| 121 packets.push_back(PacketInfo(100, 200, 0, 1500, true)); |
| 122 packets.push_back(PacketInfo(110, 210, 1, 1500, true)); |
| 123 packets.push_back(PacketInfo(120, 220, 2, 1500, true)); |
| 124 packets.push_back(PacketInfo(130, 230, 3, 1500, true)); |
| 125 packets.push_back(PacketInfo(140, 240, 4, 1500, true)); |
| 126 |
| 127 for (const PacketInfo& packet : packets) |
| 128 OnPacketSent(packet); |
| 129 |
| 130 rtcp::TransportFeedback feedback; |
| 131 feedback.WithBase(packets[0].sequence_number, |
| 132 packets[0].arrival_time_ms * 1000); |
| 133 |
| 134 for (const PacketInfo& packet : packets) { |
| 135 EXPECT_TRUE(feedback.WithReceivedPacket(packet.sequence_number, |
| 136 packet.arrival_time_ms * 1000)); |
| 137 } |
| 138 |
| 139 feedback.Build(); |
| 140 |
| 141 EXPECT_CALL(*bitrate_estimator_, IncomingPacketFeedbackVector(_)) |
| 142 .Times(1) |
| 143 .WillOnce(Invoke( |
| 144 [packets, this](const std::vector<PacketInfo>& feedback_vector) { |
| 145 ComparePacketVectors(packets, feedback_vector); |
| 146 })); |
| 147 adapter_->OnTransportFeedback(feedback); |
| 148 } |
| 149 |
| 150 TEST_F(TransportFeedbackAdapterTest, HandlesDroppedPackets) { |
| 151 std::vector<PacketInfo> packets; |
| 152 packets.push_back(PacketInfo(100, 200, 0, 1500, true)); |
| 153 packets.push_back(PacketInfo(110, 210, 1, 1500, true)); |
| 154 packets.push_back(PacketInfo(120, 220, 2, 1500, true)); |
| 155 packets.push_back(PacketInfo(130, 230, 3, 1500, true)); |
| 156 packets.push_back(PacketInfo(140, 240, 4, 1500, true)); |
| 157 |
| 158 const uint16_t kSendSideDropBefore = 1; |
| 159 const uint16_t kReceiveSideDropAfter = 3; |
| 160 |
| 161 for (const PacketInfo& packet : packets) { |
| 162 if (packet.sequence_number >= kSendSideDropBefore) |
| 163 OnPacketSent(packet); |
| 164 } |
| 165 |
| 166 rtcp::TransportFeedback feedback; |
| 167 feedback.WithBase(packets[0].sequence_number, |
| 168 packets[0].arrival_time_ms * 1000); |
| 169 |
| 170 for (const PacketInfo& packet : packets) { |
| 171 if (packet.sequence_number <= kReceiveSideDropAfter) { |
| 172 EXPECT_TRUE(feedback.WithReceivedPacket(packet.sequence_number, |
| 173 packet.arrival_time_ms * 1000)); |
| 174 } |
| 175 } |
| 176 |
| 177 feedback.Build(); |
| 178 |
| 179 std::vector<PacketInfo> expected_packets( |
| 180 packets.begin() + kSendSideDropBefore, |
| 181 packets.begin() + kReceiveSideDropAfter + 1); |
| 182 |
| 183 EXPECT_CALL(*bitrate_estimator_, IncomingPacketFeedbackVector(_)) |
| 184 .Times(1) |
| 185 .WillOnce(Invoke([expected_packets, |
| 186 this](const std::vector<PacketInfo>& feedback_vector) { |
| 187 ComparePacketVectors(expected_packets, feedback_vector); |
| 188 })); |
| 189 adapter_->OnTransportFeedback(feedback); |
| 190 } |
| 191 |
| 192 TEST_F(TransportFeedbackAdapterTest, SendTimeWrapsBothWays) { |
| 193 int64_t kHighArrivalTimeMs = rtcp::TransportFeedback::kDeltaScaleFactor * |
| 194 static_cast<int64_t>(1 << 8) * |
| 195 static_cast<int64_t>((1 << 23) - 1) / 1000; |
| 196 std::vector<PacketInfo> packets; |
| 197 packets.push_back(PacketInfo(kHighArrivalTimeMs - 64, 200, 0, 1500, true)); |
| 198 packets.push_back(PacketInfo(kHighArrivalTimeMs + 64, 210, 1, 1500, true)); |
| 199 packets.push_back(PacketInfo(kHighArrivalTimeMs, 220, 2, 1500, true)); |
| 200 |
| 201 for (const PacketInfo& packet : packets) |
| 202 OnPacketSent(packet); |
| 203 |
| 204 for (size_t i = 0; i < packets.size(); ++i) { |
| 205 rtc::scoped_ptr<rtcp::TransportFeedback> feedback( |
| 206 new rtcp::TransportFeedback()); |
| 207 feedback->WithBase(packets[i].sequence_number, |
| 208 packets[i].arrival_time_ms * 1000); |
| 209 |
| 210 EXPECT_TRUE(feedback->WithReceivedPacket( |
| 211 packets[i].sequence_number, packets[i].arrival_time_ms * 1000)); |
| 212 |
| 213 rtc::scoped_ptr<rtcp::RawPacket> raw_packet = feedback->Build(); |
| 214 feedback = rtcp::TransportFeedback::ParseFrom(raw_packet->Buffer(), |
| 215 raw_packet->Length()); |
| 216 |
| 217 std::vector<PacketInfo> expected_packets; |
| 218 expected_packets.push_back(packets[i]); |
| 219 |
| 220 EXPECT_CALL(*bitrate_estimator_, IncomingPacketFeedbackVector(_)) |
| 221 .Times(1) |
| 222 .WillOnce(Invoke([expected_packets, this]( |
| 223 const std::vector<PacketInfo>& feedback_vector) { |
| 224 ComparePacketVectors(expected_packets, feedback_vector); |
| 225 })); |
| 226 adapter_->OnTransportFeedback(*feedback.get()); |
| 227 } |
| 228 } |
| 229 |
| 230 TEST_F(TransportFeedbackAdapterTest, TimestampDeltas) { |
| 231 std::vector<PacketInfo> sent_packets; |
| 232 const int64_t kSmallDeltaUs = |
| 233 rtcp::TransportFeedback::kDeltaScaleFactor * ((1 << 8) - 1); |
| 234 const int64_t kLargePositiveDeltaUs = |
| 235 rtcp::TransportFeedback::kDeltaScaleFactor * |
| 236 std::numeric_limits<int16_t>::max(); |
| 237 const int64_t kLargeNegativeDeltaUs = |
| 238 rtcp::TransportFeedback::kDeltaScaleFactor * |
| 239 std::numeric_limits<int16_t>::min(); |
| 240 |
| 241 PacketInfo info(100, 200, 0, 1500, true); |
| 242 sent_packets.push_back(info); |
| 243 |
| 244 info.send_time_ms += kSmallDeltaUs / 1000; |
| 245 info.arrival_time_ms += kSmallDeltaUs / 1000; |
| 246 ++info.sequence_number; |
| 247 sent_packets.push_back(info); |
| 248 |
| 249 info.send_time_ms += kLargePositiveDeltaUs / 1000; |
| 250 info.arrival_time_ms += kLargePositiveDeltaUs / 1000; |
| 251 ++info.sequence_number; |
| 252 sent_packets.push_back(info); |
| 253 |
| 254 info.send_time_ms += kLargeNegativeDeltaUs / 1000; |
| 255 info.arrival_time_ms += kLargeNegativeDeltaUs / 1000; |
| 256 ++info.sequence_number; |
| 257 sent_packets.push_back(info); |
| 258 |
| 259 // Too large, delta - will need two feedback messages. |
| 260 info.send_time_ms += (kLargePositiveDeltaUs + 1000) / 1000; |
| 261 info.arrival_time_ms += (kLargePositiveDeltaUs + 1000) / 1000; |
| 262 ++info.sequence_number; |
| 263 |
| 264 // Packets will be added to send history. |
| 265 for (const PacketInfo& packet : sent_packets) |
| 266 OnPacketSent(packet); |
| 267 OnPacketSent(info); |
| 268 |
| 269 // Create expected feedback and send into adapter. |
| 270 rtc::scoped_ptr<rtcp::TransportFeedback> feedback( |
| 271 new rtcp::TransportFeedback()); |
| 272 feedback->WithBase(sent_packets[0].sequence_number, |
| 273 sent_packets[0].arrival_time_ms * 1000); |
| 274 |
| 275 for (const PacketInfo& packet : sent_packets) { |
| 276 EXPECT_TRUE(feedback->WithReceivedPacket(packet.sequence_number, |
| 277 packet.arrival_time_ms * 1000)); |
| 278 } |
| 279 EXPECT_FALSE(feedback->WithReceivedPacket(info.sequence_number, |
| 280 info.arrival_time_ms * 1000)); |
| 281 |
| 282 rtc::scoped_ptr<rtcp::RawPacket> raw_packet = feedback->Build(); |
| 283 feedback = rtcp::TransportFeedback::ParseFrom(raw_packet->Buffer(), |
| 284 raw_packet->Length()); |
| 285 |
| 286 std::vector<PacketInfo> received_feedback; |
| 287 |
| 288 EXPECT_TRUE(feedback.get() != nullptr); |
| 289 EXPECT_CALL(*bitrate_estimator_, IncomingPacketFeedbackVector(_)) |
| 290 .Times(1) |
| 291 .WillOnce(Invoke([sent_packets, &received_feedback]( |
| 292 const std::vector<PacketInfo>& feedback_vector) { |
| 293 EXPECT_EQ(sent_packets.size(), feedback_vector.size()); |
| 294 received_feedback = feedback_vector; |
| 295 })); |
| 296 adapter_->OnTransportFeedback(*feedback.get()); |
| 297 |
| 298 // Create a new feedback message and add the trailing item. |
| 299 feedback.reset(new rtcp::TransportFeedback()); |
| 300 feedback->WithBase(info.sequence_number, info.arrival_time_ms * 1000); |
| 301 EXPECT_TRUE(feedback->WithReceivedPacket(info.sequence_number, |
| 302 info.arrival_time_ms * 1000)); |
| 303 raw_packet = feedback->Build(); |
| 304 feedback = rtcp::TransportFeedback::ParseFrom(raw_packet->Buffer(), |
| 305 raw_packet->Length()); |
| 306 |
| 307 EXPECT_TRUE(feedback.get() != nullptr); |
| 308 EXPECT_CALL(*bitrate_estimator_, IncomingPacketFeedbackVector(_)) |
| 309 .Times(1) |
| 310 .WillOnce(Invoke( |
| 311 [&received_feedback](const std::vector<PacketInfo>& feedback_vector) { |
| 312 EXPECT_EQ(1u, feedback_vector.size()); |
| 313 received_feedback.push_back(feedback_vector[0]); |
| 314 })); |
| 315 adapter_->OnTransportFeedback(*feedback.get()); |
| 316 |
| 317 sent_packets.push_back(info); |
| 318 |
| 319 ComparePacketVectors(sent_packets, received_feedback); |
| 320 } |
| 321 |
| 322 } // namespace test |
| 323 } // namespace webrtc |
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