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 "testing/gtest/include/gtest/gtest.h" 14#include "webrtc/voice_engine/network_predictor.h" 15#include "webrtc/system_wrappers/include/clock.h" 16 17namespace webrtc { 18namespace voe { 19 20class TestNetworkPredictor : public ::testing::Test { 21 protected: 22 TestNetworkPredictor() 23 : clock_(0), 24 network_predictor_(new NetworkPredictor(&clock_)) {} 25 SimulatedClock clock_; 26 rtc::scoped_ptr<NetworkPredictor> network_predictor_; 27}; 28 29TEST_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()); 41} 42} // namespace voe 43} // namespace webrtc 44