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| 1 /* | |
| 2 * Copyright (c) 2014 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 | |
| 13 #include <memory> | |
| 14 | |
| 15 #include "webrtc/system_wrappers/include/clock.h" | |
| 16 #include "webrtc/test/gtest.h" | |
| 17 #include "webrtc/voice_engine/network_predictor.h" | |
| 18 | |
| 19 namespace webrtc { | |
| 20 namespace voe { | |
| 21 | |
| 22 class TestNetworkPredictor : public ::testing::Test { | |
| 23 protected: | |
| 24 TestNetworkPredictor() | |
| 25 : clock_(0), | |
| 26 network_predictor_(new NetworkPredictor(&clock_)) {} | |
| 27 SimulatedClock clock_; | |
| 28 std::unique_ptr<NetworkPredictor> network_predictor_; | |
| 29 }; | |
| 30 | |
| 31 TEST_F(TestNetworkPredictor, TestPacketLossRateFilter) { | |
| 32 // Test initial packet loss rate estimate is 0. | |
| 33 EXPECT_EQ(0, network_predictor_->GetLossRate()); | |
| 34 network_predictor_->UpdatePacketLossRate(32); | |
| 35 // First time, no filtering. | |
| 36 EXPECT_EQ(32, network_predictor_->GetLossRate()); | |
| 37 clock_.AdvanceTimeMilliseconds(1000); | |
| 38 network_predictor_->UpdatePacketLossRate(40); | |
| 39 float exp = pow(0.9999f, 1000); | |
| 40 float value = 32.0f * exp + (1 - exp) * 40.0f; | |
| 41 EXPECT_EQ(static_cast<uint8_t>(value + 0.5f), | |
| 42 network_predictor_->GetLossRate()); | |
| 43 } | |
| 44 } // namespace voe | |
| 45 } // namespace webrtc | |
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