2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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.
13 #include "testing/gtest/include/gtest/gtest.h"
14 #include "webrtc/voice_engine/network_predictor.h"
15 #include "webrtc/system_wrappers/interface/clock.h"
20 class TestNetworkPredictor : public ::testing::Test {
22 TestNetworkPredictor()
24 network_predictor_(new NetworkPredictor(&clock_)) {}
25 SimulatedClock clock_;
26 scoped_ptr<NetworkPredictor> network_predictor_;
29 TEST_F(TestNetworkPredictor, TestPacketLossRateFilter) {
30 // Test initial packet loss rate estimate is 0.
31 EXPECT_EQ(0, network_predictor_->GetLossRate());
32 network_predictor_->UpdatePacketLossRate(32);
33 // First time, no filtering.
34 EXPECT_EQ(32, network_predictor_->GetLossRate());
35 clock_.AdvanceTimeMilliseconds(1000);
36 network_predictor_->UpdatePacketLossRate(40);
37 float exp = pow(0.9999f, 1000);
38 float value = 32.0f * exp + (1 - exp) * 40.0f;
39 EXPECT_EQ(static_cast<uint8_t>(value + 0.5f),
40 network_predictor_->GetLossRate());