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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 #include <memory> | 10 #include <memory> |
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82 TEST(AimdRateControlTest, GetLastBitrateDecrease) { | 82 TEST(AimdRateControlTest, GetLastBitrateDecrease) { |
83 auto states = CreateAimdRateControlStates(); | 83 auto states = CreateAimdRateControlStates(); |
84 constexpr int kBitrate = 300000; | 84 constexpr int kBitrate = 300000; |
85 InitBitrate(states, kBitrate, states.simulated_clock->TimeInMilliseconds()); | 85 InitBitrate(states, kBitrate, states.simulated_clock->TimeInMilliseconds()); |
86 UpdateRateControl(states, kBwOverusing, kBitrate - 2000, | 86 UpdateRateControl(states, kBwOverusing, kBitrate - 2000, |
87 states.simulated_clock->TimeInMilliseconds()); | 87 states.simulated_clock->TimeInMilliseconds()); |
88 EXPECT_EQ(rtc::Optional<int>(46700), | 88 EXPECT_EQ(rtc::Optional<int>(46700), |
89 states.aimd_rate_control->GetLastBitrateDecreaseBps()); | 89 states.aimd_rate_control->GetLastBitrateDecreaseBps()); |
90 } | 90 } |
91 | 91 |
| 92 TEST(AimdRateControlTest, BweLimitedByAckedBitrate) { |
| 93 auto states = CreateAimdRateControlStates(); |
| 94 constexpr int kAckedBitrate = 10000; |
| 95 InitBitrate(states, kAckedBitrate, |
| 96 states.simulated_clock->TimeInMilliseconds()); |
| 97 while (states.simulated_clock->TimeInMilliseconds() - kClockInitialTime < |
| 98 20000) { |
| 99 UpdateRateControl(states, kBwNormal, kAckedBitrate, |
| 100 states.simulated_clock->TimeInMilliseconds()); |
| 101 states.simulated_clock->AdvanceTimeMilliseconds(100); |
| 102 } |
| 103 ASSERT_TRUE(states.aimd_rate_control->ValidEstimate()); |
| 104 EXPECT_EQ(static_cast<uint32_t>(1.5 * kAckedBitrate + 10000), |
| 105 states.aimd_rate_control->LatestEstimate()); |
| 106 } |
| 107 |
| 108 TEST(AimdRateControlTest, BweNotLimitedByDecreasingAckedBitrate) { |
| 109 auto states = CreateAimdRateControlStates(); |
| 110 constexpr int kAckedBitrate = 100000; |
| 111 InitBitrate(states, kAckedBitrate, |
| 112 states.simulated_clock->TimeInMilliseconds()); |
| 113 while (states.simulated_clock->TimeInMilliseconds() - kClockInitialTime < |
| 114 20000) { |
| 115 UpdateRateControl(states, kBwNormal, kAckedBitrate, |
| 116 states.simulated_clock->TimeInMilliseconds()); |
| 117 states.simulated_clock->AdvanceTimeMilliseconds(100); |
| 118 } |
| 119 ASSERT_TRUE(states.aimd_rate_control->ValidEstimate()); |
| 120 // If the acked bitrate decreases the BWE shouldn't be reduced to 1.5x |
| 121 // what's being acked, but also shouldn't get to increase more. |
| 122 uint32_t prev_estimate = states.aimd_rate_control->LatestEstimate(); |
| 123 UpdateRateControl(states, kBwNormal, kAckedBitrate / 2, |
| 124 states.simulated_clock->TimeInMilliseconds()); |
| 125 uint32_t new_estimate = states.aimd_rate_control->LatestEstimate(); |
| 126 EXPECT_NEAR(new_estimate, static_cast<uint32_t>(1.5 * kAckedBitrate + 10000), |
| 127 2000); |
| 128 EXPECT_EQ(new_estimate, prev_estimate); |
| 129 } |
92 } // namespace webrtc | 130 } // namespace webrtc |
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