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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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