2e10b8e4a0
BUG=1662 R=tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/1787004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4349 4adac7df-926f-26a2-2b94-8c16560cd09d
261 lines
10 KiB
C++
261 lines
10 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "testing/gtest/include/gtest/gtest.h"
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#include <algorithm>
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#include <vector>
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#include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
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#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
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using webrtc::RtcpBandwidthObserver;
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using webrtc::BitrateObserver;
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using webrtc::BitrateController;
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class TestBitrateObserver: public BitrateObserver {
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public:
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TestBitrateObserver()
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: last_bitrate_(0),
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last_fraction_loss_(0),
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last_rtt_(0) {
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}
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virtual void OnNetworkChanged(const uint32_t bitrate,
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const uint8_t fraction_loss,
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const uint32_t rtt) {
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last_bitrate_ = bitrate;
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last_fraction_loss_ = fraction_loss;
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last_rtt_ = rtt;
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}
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uint32_t last_bitrate_;
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uint8_t last_fraction_loss_;
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uint32_t last_rtt_;
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};
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class BitrateControllerTest : public ::testing::Test {
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protected:
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BitrateControllerTest() {
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}
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~BitrateControllerTest() {}
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virtual void SetUp() {
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controller_ = BitrateController::CreateBitrateController();
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bandwidth_observer_ = controller_->CreateRtcpBandwidthObserver();
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}
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virtual void TearDown() {
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delete bandwidth_observer_;
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delete controller_;
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}
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BitrateController* controller_;
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RtcpBandwidthObserver* bandwidth_observer_;
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};
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TEST_F(BitrateControllerTest, Basic) {
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TestBitrateObserver bitrate_observer;
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controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
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controller_->RemoveBitrateObserver(&bitrate_observer);
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}
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TEST_F(BitrateControllerTest, OneBitrateObserverOneRtcpObserver) {
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TestBitrateObserver bitrate_observer;
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controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
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// Receive a high remb, test bitrate inc.
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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// Test start bitrate.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 1, 1);
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EXPECT_EQ(0u, bitrate_observer.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
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EXPECT_EQ(0u, bitrate_observer.last_rtt_);
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// Test bitrate increase 8% per second.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 21, 1001);
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EXPECT_EQ(217000u, bitrate_observer.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer.last_rtt_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 41, 2001);
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EXPECT_EQ(235360u, bitrate_observer.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 61, 3001);
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EXPECT_EQ(255189u, bitrate_observer.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 801, 4001);
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EXPECT_EQ(276604u, bitrate_observer.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 101, 5001);
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EXPECT_EQ(299732u, bitrate_observer.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 121, 6001);
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EXPECT_EQ(300000u, bitrate_observer.last_bitrate_); // Max cap.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 141, 7001);
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EXPECT_EQ(300000u, bitrate_observer.last_bitrate_); // Max cap.
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// Test that a low REMB trigger immediately.
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bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
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EXPECT_EQ(250000u, bitrate_observer.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer.last_rtt_);
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bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
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EXPECT_EQ(100000u, bitrate_observer.last_bitrate_); // Min cap.
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controller_->RemoveBitrateObserver(&bitrate_observer);
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}
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TEST_F(BitrateControllerTest, OneBitrateObserverTwoRtcpObservers) {
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TestBitrateObserver bitrate_observer;
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controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
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RtcpBandwidthObserver* second_bandwidth_observer =
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controller_->CreateRtcpBandwidthObserver();
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// Receive a high remb, test bitrate inc.
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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// Test start bitrate.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 1, 1);
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 100, 1, 1);
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EXPECT_EQ(0u, bitrate_observer.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
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EXPECT_EQ(0u, bitrate_observer.last_rtt_);
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// Test bitrate increase 8% per second.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 21, 501);
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 100, 21, 1001);
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EXPECT_EQ(217000u, bitrate_observer.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
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EXPECT_EQ(100u, bitrate_observer.last_rtt_);
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// Extra report should not change estimate.
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 100, 31, 1501);
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EXPECT_EQ(217000u, bitrate_observer.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 41, 2001);
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EXPECT_EQ(235360u, bitrate_observer.last_bitrate_);
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// Second report should not change estimate.
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 100, 41, 2001);
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EXPECT_EQ(235360u, bitrate_observer.last_bitrate_);
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// Reports from only one bandwidth observer is ok.
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 50, 61, 3001);
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EXPECT_EQ(255189u, bitrate_observer.last_bitrate_);
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 50, 81, 4001);
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EXPECT_EQ(276604u, bitrate_observer.last_bitrate_);
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 50, 101, 5001);
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EXPECT_EQ(299732u, bitrate_observer.last_bitrate_);
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 50, 121, 6001);
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EXPECT_EQ(300000u, bitrate_observer.last_bitrate_); // Max cap.
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(1, 0, 50, 141, 7001);
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EXPECT_EQ(300000u, bitrate_observer.last_bitrate_); // Max cap.
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// Test that a low REMB trigger immediately.
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// We don't care which bandwidth observer that delivers the REMB.
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second_bandwidth_observer->OnReceivedEstimatedBitrate(250000);
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EXPECT_EQ(250000u, bitrate_observer.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer.last_rtt_);
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bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
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EXPECT_EQ(100000u, bitrate_observer.last_bitrate_); // Min cap.
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controller_->RemoveBitrateObserver(&bitrate_observer);
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delete second_bandwidth_observer;
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}
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TEST_F(BitrateControllerTest, TwoBitrateObserversOneRtcpObserver) {
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TestBitrateObserver bitrate_observer_1;
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TestBitrateObserver bitrate_observer_2;
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controller_->SetBitrateObserver(&bitrate_observer_2, 200000, 200000, 300000);
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controller_->SetBitrateObserver(&bitrate_observer_1, 200000, 100000, 300000);
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// Receive a high remb, test bitrate inc.
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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// Test too low start bitrate, hence lower than sum of min.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 1, 1);
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// Test bitrate increase 8% per second, distributed equally.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 21, 1001);
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EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_1.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer_1.last_rtt_);
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EXPECT_EQ(200000u, bitrate_observer_2.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_2.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer_2.last_rtt_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 41, 2001);
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EXPECT_EQ(112500u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(212500u, bitrate_observer_2.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 61, 3001);
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EXPECT_EQ(126000u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(226000u, bitrate_observer_2.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 81, 4001);
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EXPECT_EQ(140580u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(240580u, bitrate_observer_2.last_bitrate_);
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// Check that the bitrate sum honor our REMB.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 101, 5001);
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EXPECT_EQ(150000u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(250000u, bitrate_observer_2.last_bitrate_);
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// Remove REMB cap, higher than sum of max.
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bandwidth_observer_->OnReceivedEstimatedBitrate(700000);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 121, 6001);
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EXPECT_EQ(166500u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(266500u, bitrate_observer_2.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 141, 7001);
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EXPECT_EQ(184320u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(284320u, bitrate_observer_2.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 161, 8001);
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EXPECT_EQ(207130u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_); // Max cap.
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 181, 9001);
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EXPECT_EQ(248700u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 201, 10001);
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EXPECT_EQ(293596u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(1, 0, 50, 221, 11001);
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EXPECT_EQ(300000u, bitrate_observer_1.last_bitrate_); // Max cap.
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EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_);
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// Test that a low REMB trigger immediately.
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bandwidth_observer_->OnReceivedEstimatedBitrate(350000);
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EXPECT_EQ(125000u, bitrate_observer_1.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_1.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer_1.last_rtt_);
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EXPECT_EQ(225000u, bitrate_observer_2.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_2.last_fraction_loss_);
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EXPECT_EQ(50u, bitrate_observer_2.last_rtt_);
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bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
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EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_); // Min cap.
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EXPECT_EQ(200000u, bitrate_observer_2.last_bitrate_); // Min cap.
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controller_->RemoveBitrateObserver(&bitrate_observer_1);
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controller_->RemoveBitrateObserver(&bitrate_observer_2);
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}
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