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| 1 /* | 1 /* |
| 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #include "webrtc/test/gtest.h" | 11 #include "webrtc/test/gtest.h" |
| 12 #include "webrtc/base/constructormagic.h" | 12 #include "webrtc/base/constructormagic.h" |
| 13 #include "webrtc/modules/pacing/paced_sender.h" | 13 #include "webrtc/modules/pacing/paced_sender.h" |
| 14 #include "webrtc/modules/congestion_controller/delay_based_bwe.h" | 14 #include "webrtc/modules/congestion_controller/delay_based_bwe.h" |
| 15 #include "webrtc/modules/congestion_controller/delay_based_bwe_unittest_helper.h
" | 15 #include "webrtc/modules/congestion_controller/delay_based_bwe_unittest_helper.h
" |
| 16 #include "webrtc/system_wrappers/include/clock.h" | 16 #include "webrtc/system_wrappers/include/clock.h" |
| 17 #include "webrtc/test/field_trial.h" | 17 #include "webrtc/test/field_trial.h" |
| 18 | 18 |
| 19 namespace webrtc { | 19 namespace webrtc { |
| 20 | 20 |
| 21 namespace { | 21 namespace { |
| 22 | 22 const PacedPacketInfo kPacingInfo0(0, 5, 2000); |
| 23 const PacedPacketInfo kPacingInfo1(1, 8, 4000); |
| 23 constexpr int kNumProbes = 5; | 24 constexpr int kNumProbes = 5; |
| 24 } // namespace | 25 } // namespace |
| 25 | 26 |
| 26 TEST_F(DelayBasedBweTest, ProbeDetection) { | 27 TEST_F(DelayBasedBweTest, ProbeDetection) { |
| 27 int64_t now_ms = clock_.TimeInMilliseconds(); | 28 int64_t now_ms = clock_.TimeInMilliseconds(); |
| 28 uint16_t seq_num = 0; | 29 uint16_t seq_num = 0; |
| 29 | 30 |
| 30 // First burst sent at 8 * 1000 / 10 = 800 kbps. | 31 // First burst sent at 8 * 1000 / 10 = 800 kbps. |
| 31 for (int i = 0; i < kNumProbes; ++i) { | 32 for (int i = 0; i < kNumProbes; ++i) { |
| 32 clock_.AdvanceTimeMilliseconds(10); | 33 clock_.AdvanceTimeMilliseconds(10); |
| 33 now_ms = clock_.TimeInMilliseconds(); | 34 now_ms = clock_.TimeInMilliseconds(); |
| 34 IncomingFeedback(now_ms, now_ms, seq_num++, 1000, 0); | 35 IncomingFeedback(now_ms, now_ms, seq_num++, 1000, kPacingInfo0); |
| 35 } | 36 } |
| 36 EXPECT_TRUE(bitrate_observer_.updated()); | 37 EXPECT_TRUE(bitrate_observer_.updated()); |
| 37 | 38 |
| 38 // Second burst sent at 8 * 1000 / 5 = 1600 kbps. | 39 // Second burst sent at 8 * 1000 / 5 = 1600 kbps. |
| 39 for (int i = 0; i < kNumProbes; ++i) { | 40 for (int i = 0; i < kNumProbes; ++i) { |
| 40 clock_.AdvanceTimeMilliseconds(5); | 41 clock_.AdvanceTimeMilliseconds(5); |
| 41 now_ms = clock_.TimeInMilliseconds(); | 42 now_ms = clock_.TimeInMilliseconds(); |
| 42 IncomingFeedback(now_ms, now_ms, seq_num++, 1000, 1); | 43 IncomingFeedback(now_ms, now_ms, seq_num++, 1000, kPacingInfo1); |
| 43 } | 44 } |
| 44 | 45 |
| 45 EXPECT_TRUE(bitrate_observer_.updated()); | 46 EXPECT_TRUE(bitrate_observer_.updated()); |
| 46 EXPECT_GT(bitrate_observer_.latest_bitrate(), 1500000u); | 47 EXPECT_GT(bitrate_observer_.latest_bitrate(), 1500000u); |
| 47 } | 48 } |
| 48 | 49 |
| 49 TEST_F(DelayBasedBweTest, ProbeDetectionNonPacedPackets) { | 50 TEST_F(DelayBasedBweTest, ProbeDetectionNonPacedPackets) { |
| 50 int64_t now_ms = clock_.TimeInMilliseconds(); | 51 int64_t now_ms = clock_.TimeInMilliseconds(); |
| 51 uint16_t seq_num = 0; | 52 uint16_t seq_num = 0; |
| 52 // First burst sent at 8 * 1000 / 10 = 800 kbps, but with every other packet | 53 // First burst sent at 8 * 1000 / 10 = 800 kbps, but with every other packet |
| 53 // not being paced which could mess things up. | 54 // not being paced which could mess things up. |
| 54 for (int i = 0; i < kNumProbes; ++i) { | 55 for (int i = 0; i < kNumProbes; ++i) { |
| 55 clock_.AdvanceTimeMilliseconds(5); | 56 clock_.AdvanceTimeMilliseconds(5); |
| 56 now_ms = clock_.TimeInMilliseconds(); | 57 now_ms = clock_.TimeInMilliseconds(); |
| 57 IncomingFeedback(now_ms, now_ms, seq_num++, 1000, 0); | 58 IncomingFeedback(now_ms, now_ms, seq_num++, 1000, kPacingInfo0); |
| 58 // Non-paced packet, arriving 5 ms after. | 59 // Non-paced packet, arriving 5 ms after. |
| 59 clock_.AdvanceTimeMilliseconds(5); | 60 clock_.AdvanceTimeMilliseconds(5); |
| 60 IncomingFeedback(now_ms, now_ms, seq_num++, 100, | 61 IncomingFeedback(now_ms, now_ms, seq_num++, 100, PacedPacketInfo()); |
| 61 PacedPacketInfo::kNotAProbe); | |
| 62 } | 62 } |
| 63 | 63 |
| 64 EXPECT_TRUE(bitrate_observer_.updated()); | 64 EXPECT_TRUE(bitrate_observer_.updated()); |
| 65 EXPECT_GT(bitrate_observer_.latest_bitrate(), 800000u); | 65 EXPECT_GT(bitrate_observer_.latest_bitrate(), 800000u); |
| 66 } | 66 } |
| 67 | 67 |
| 68 TEST_F(DelayBasedBweTest, ProbeDetectionFasterArrival) { | 68 TEST_F(DelayBasedBweTest, ProbeDetectionFasterArrival) { |
| 69 int64_t now_ms = clock_.TimeInMilliseconds(); | 69 int64_t now_ms = clock_.TimeInMilliseconds(); |
| 70 uint16_t seq_num = 0; | 70 uint16_t seq_num = 0; |
| 71 // First burst sent at 8 * 1000 / 10 = 800 kbps. | 71 // First burst sent at 8 * 1000 / 10 = 800 kbps. |
| 72 // Arriving at 8 * 1000 / 5 = 1600 kbps. | 72 // Arriving at 8 * 1000 / 5 = 1600 kbps. |
| 73 int64_t send_time_ms = 0; | 73 int64_t send_time_ms = 0; |
| 74 for (int i = 0; i < kNumProbes; ++i) { | 74 for (int i = 0; i < kNumProbes; ++i) { |
| 75 clock_.AdvanceTimeMilliseconds(1); | 75 clock_.AdvanceTimeMilliseconds(1); |
| 76 send_time_ms += 10; | 76 send_time_ms += 10; |
| 77 now_ms = clock_.TimeInMilliseconds(); | 77 now_ms = clock_.TimeInMilliseconds(); |
| 78 IncomingFeedback(now_ms, send_time_ms, seq_num++, 1000, 0); | 78 IncomingFeedback(now_ms, send_time_ms, seq_num++, 1000, kPacingInfo0); |
| 79 } | 79 } |
| 80 | 80 |
| 81 EXPECT_FALSE(bitrate_observer_.updated()); | 81 EXPECT_FALSE(bitrate_observer_.updated()); |
| 82 } | 82 } |
| 83 | 83 |
| 84 TEST_F(DelayBasedBweTest, ProbeDetectionSlowerArrival) { | 84 TEST_F(DelayBasedBweTest, ProbeDetectionSlowerArrival) { |
| 85 int64_t now_ms = clock_.TimeInMilliseconds(); | 85 int64_t now_ms = clock_.TimeInMilliseconds(); |
| 86 uint16_t seq_num = 0; | 86 uint16_t seq_num = 0; |
| 87 // First burst sent at 8 * 1000 / 5 = 1600 kbps. | 87 // First burst sent at 8 * 1000 / 5 = 1600 kbps. |
| 88 // Arriving at 8 * 1000 / 7 = 1142 kbps. | 88 // Arriving at 8 * 1000 / 7 = 1142 kbps. |
| 89 int64_t send_time_ms = 0; | 89 int64_t send_time_ms = 0; |
| 90 for (int i = 0; i < kNumProbes; ++i) { | 90 for (int i = 0; i < kNumProbes; ++i) { |
| 91 clock_.AdvanceTimeMilliseconds(7); | 91 clock_.AdvanceTimeMilliseconds(7); |
| 92 send_time_ms += 5; | 92 send_time_ms += 5; |
| 93 now_ms = clock_.TimeInMilliseconds(); | 93 now_ms = clock_.TimeInMilliseconds(); |
| 94 IncomingFeedback(now_ms, send_time_ms, seq_num++, 1000, 1); | 94 IncomingFeedback(now_ms, send_time_ms, seq_num++, 1000, kPacingInfo1); |
| 95 } | 95 } |
| 96 | 96 |
| 97 EXPECT_TRUE(bitrate_observer_.updated()); | 97 EXPECT_TRUE(bitrate_observer_.updated()); |
| 98 EXPECT_NEAR(bitrate_observer_.latest_bitrate(), 1140000u, 10000u); | 98 EXPECT_NEAR(bitrate_observer_.latest_bitrate(), 1140000u, 10000u); |
| 99 } | 99 } |
| 100 | 100 |
| 101 TEST_F(DelayBasedBweTest, ProbeDetectionSlowerArrivalHighBitrate) { | 101 TEST_F(DelayBasedBweTest, ProbeDetectionSlowerArrivalHighBitrate) { |
| 102 int64_t now_ms = clock_.TimeInMilliseconds(); | 102 int64_t now_ms = clock_.TimeInMilliseconds(); |
| 103 uint16_t seq_num = 0; | 103 uint16_t seq_num = 0; |
| 104 // Burst sent at 8 * 1000 / 1 = 8000 kbps. | 104 // Burst sent at 8 * 1000 / 1 = 8000 kbps. |
| 105 // Arriving at 8 * 1000 / 2 = 4000 kbps. | 105 // Arriving at 8 * 1000 / 2 = 4000 kbps. |
| 106 int64_t send_time_ms = 0; | 106 int64_t send_time_ms = 0; |
| 107 for (int i = 0; i < kNumProbes; ++i) { | 107 for (int i = 0; i < kNumProbes; ++i) { |
| 108 clock_.AdvanceTimeMilliseconds(2); | 108 clock_.AdvanceTimeMilliseconds(2); |
| 109 send_time_ms += 1; | 109 send_time_ms += 1; |
| 110 now_ms = clock_.TimeInMilliseconds(); | 110 now_ms = clock_.TimeInMilliseconds(); |
| 111 IncomingFeedback(now_ms, send_time_ms, seq_num++, 1000, 1); | 111 IncomingFeedback(now_ms, send_time_ms, seq_num++, 1000, kPacingInfo1); |
| 112 } | 112 } |
| 113 | 113 |
| 114 EXPECT_TRUE(bitrate_observer_.updated()); | 114 EXPECT_TRUE(bitrate_observer_.updated()); |
| 115 EXPECT_NEAR(bitrate_observer_.latest_bitrate(), 4000000u, 10000u); | 115 EXPECT_NEAR(bitrate_observer_.latest_bitrate(), 4000000u, 10000u); |
| 116 } | 116 } |
| 117 | 117 |
| 118 TEST_F(DelayBasedBweTest, GetProbingInterval) { | 118 TEST_F(DelayBasedBweTest, GetProbingInterval) { |
| 119 int64_t default_interval_ms = bitrate_estimator_->GetProbingIntervalMs(); | 119 int64_t default_interval_ms = bitrate_estimator_->GetProbingIntervalMs(); |
| 120 EXPECT_GT(default_interval_ms, 0); | 120 EXPECT_GT(default_interval_ms, 0); |
| 121 CapacityDropTestHelper(1, true, 567, 0); | 121 CapacityDropTestHelper(1, true, 567, 0); |
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| 258 | 258 |
| 259 TEST_F(DelayBasedBweMedianSlopeExperimentTest, CapacityDropNegOffsetChange) { | 259 TEST_F(DelayBasedBweMedianSlopeExperimentTest, CapacityDropNegOffsetChange) { |
| 260 CapacityDropTestHelper(1, false, 1267, -30000); | 260 CapacityDropTestHelper(1, false, 1267, -30000); |
| 261 } | 261 } |
| 262 | 262 |
| 263 TEST_F(DelayBasedBweMedianSlopeExperimentTest, CapacityDropOneStreamWrap) { | 263 TEST_F(DelayBasedBweMedianSlopeExperimentTest, CapacityDropOneStreamWrap) { |
| 264 CapacityDropTestHelper(1, true, 600, 0); | 264 CapacityDropTestHelper(1, true, 600, 0); |
| 265 } | 265 } |
| 266 | 266 |
| 267 } // namespace webrtc | 267 } // namespace webrtc |
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