16825b1a82
Existing code was inconsistent about whether to use uint16_t, int, unsigned int, or uint32_t, and sometimes silently truncated one to another, or truncated int64_t. Because most core time-handling functions use int64_t, being consistent about using int64_t unless otherwise necessary minimizes the number of explicit or implicit casts. BUG=chromium:81439 TEST=none R=henrik.lundin@webrtc.org, holmer@google.com, tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/31349004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@8045 4adac7df-926f-26a2-2b94-8c16560cd09d
642 lines
26 KiB
C++
642 lines
26 KiB
C++
/*
|
|
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "testing/gtest/include/gtest/gtest.h"
|
|
|
|
#include <algorithm>
|
|
#include <vector>
|
|
|
|
#include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
|
|
#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
|
|
|
|
using webrtc::RtcpBandwidthObserver;
|
|
using webrtc::BitrateObserver;
|
|
using webrtc::BitrateController;
|
|
|
|
uint8_t WeightedLoss(int num_packets1, uint8_t fraction_loss1,
|
|
int num_packets2, uint8_t fraction_loss2) {
|
|
int weighted_sum = num_packets1 * fraction_loss1 +
|
|
num_packets2 * fraction_loss2;
|
|
int total_num_packets = num_packets1 + num_packets2;
|
|
return (weighted_sum + total_num_packets / 2) / total_num_packets;
|
|
}
|
|
|
|
webrtc::RTCPReportBlock CreateReportBlock(
|
|
uint32_t remote_ssrc, uint32_t source_ssrc,
|
|
uint8_t fraction_lost, uint32_t extended_high_sequence_number) {
|
|
return webrtc::RTCPReportBlock(remote_ssrc, source_ssrc, fraction_lost, 0,
|
|
extended_high_sequence_number, 0, 0, 0);
|
|
}
|
|
|
|
class TestBitrateObserver: public BitrateObserver {
|
|
public:
|
|
TestBitrateObserver()
|
|
: last_bitrate_(0),
|
|
last_fraction_loss_(0),
|
|
last_rtt_(0) {
|
|
}
|
|
|
|
virtual void OnNetworkChanged(uint32_t bitrate,
|
|
uint8_t fraction_loss,
|
|
int64_t rtt) {
|
|
last_bitrate_ = bitrate;
|
|
last_fraction_loss_ = fraction_loss;
|
|
last_rtt_ = rtt;
|
|
}
|
|
uint32_t last_bitrate_;
|
|
uint8_t last_fraction_loss_;
|
|
int64_t last_rtt_;
|
|
};
|
|
|
|
class BitrateControllerTest : public ::testing::Test {
|
|
protected:
|
|
BitrateControllerTest() : clock_(0), enforce_min_bitrate_(true) {}
|
|
~BitrateControllerTest() {}
|
|
|
|
virtual void SetUp() {
|
|
controller_ = BitrateController::CreateBitrateController(
|
|
&clock_, enforce_min_bitrate_);
|
|
bandwidth_observer_ = controller_->CreateRtcpBandwidthObserver();
|
|
}
|
|
|
|
virtual void TearDown() {
|
|
delete bandwidth_observer_;
|
|
delete controller_;
|
|
}
|
|
|
|
webrtc::SimulatedClock clock_;
|
|
bool enforce_min_bitrate_;
|
|
BitrateController* controller_;
|
|
RtcpBandwidthObserver* bandwidth_observer_;
|
|
};
|
|
|
|
TEST_F(BitrateControllerTest, Basic) {
|
|
TestBitrateObserver bitrate_observer;
|
|
controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, UpdatingBitrateObserver) {
|
|
TestBitrateObserver bitrate_observer;
|
|
controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 1500000);
|
|
clock_.AdvanceTimeMilliseconds(25);
|
|
controller_->Process();
|
|
EXPECT_EQ(200000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetBitrateObserver(&bitrate_observer, 1500000, 100000, 1500000);
|
|
clock_.AdvanceTimeMilliseconds(25);
|
|
controller_->Process();
|
|
EXPECT_EQ(1500000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetBitrateObserver(&bitrate_observer, 500000, 100000, 1500000);
|
|
clock_.AdvanceTimeMilliseconds(25);
|
|
controller_->Process();
|
|
EXPECT_EQ(1500000u, bitrate_observer.last_bitrate_);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, OneBitrateObserverOneRtcpObserver) {
|
|
TestBitrateObserver bitrate_observer;
|
|
controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
|
|
|
|
// First REMB applies immediately.
|
|
int64_t time_ms = 1001;
|
|
webrtc::ReportBlockList report_blocks;
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 1));
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
|
|
EXPECT_EQ(200000u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(0, bitrate_observer.last_rtt_);
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
report_blocks.clear();
|
|
time_ms += 2000;
|
|
|
|
// Receive a high remb, test bitrate inc.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
|
|
|
|
// Test bitrate increase 8% per second.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(217000u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(235360u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 61));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(255189u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 81));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(276604u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 801));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(299732u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
// Reach max cap.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 101));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(300000u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 141));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(300000u, bitrate_observer.last_bitrate_);
|
|
|
|
// Test that a low REMB trigger immediately.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
|
|
EXPECT_EQ(250000u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
|
|
EXPECT_EQ(100000u, bitrate_observer.last_bitrate_); // Min cap.
|
|
controller_->RemoveBitrateObserver(&bitrate_observer);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, OneBitrateObserverTwoRtcpObservers) {
|
|
TestBitrateObserver bitrate_observer;
|
|
controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
|
|
|
|
// REMBs during the first 2 seconds apply immediately.
|
|
int64_t time_ms = 1;
|
|
webrtc::ReportBlockList report_blocks;
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 1));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
report_blocks.clear();
|
|
time_ms += 500;
|
|
|
|
RtcpBandwidthObserver* second_bandwidth_observer =
|
|
controller_->CreateRtcpBandwidthObserver();
|
|
|
|
// Test start bitrate.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 100, 1);
|
|
EXPECT_EQ(217000u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(100, bitrate_observer.last_rtt_);
|
|
time_ms += 500;
|
|
|
|
// Test bitrate increase 8% per second.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
time_ms += 500;
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 100, time_ms);
|
|
EXPECT_EQ(235360u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(100, bitrate_observer.last_rtt_);
|
|
time_ms += 500;
|
|
|
|
// Extra report should not change estimate.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 31));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 100, time_ms);
|
|
EXPECT_EQ(235360u, bitrate_observer.last_bitrate_);
|
|
time_ms += 500;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(255189u, bitrate_observer.last_bitrate_);
|
|
|
|
// Second report should not change estimate.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 100, time_ms);
|
|
EXPECT_EQ(255189u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
// Reports from only one bandwidth observer is ok.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 61));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, time_ms);
|
|
EXPECT_EQ(276604u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 81));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, time_ms);
|
|
EXPECT_EQ(299732u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
// Reach max cap.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 121));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, time_ms);
|
|
EXPECT_EQ(300000u, bitrate_observer.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 141));
|
|
second_bandwidth_observer->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, time_ms);
|
|
EXPECT_EQ(300000u, bitrate_observer.last_bitrate_);
|
|
|
|
// Test that a low REMB trigger immediately.
|
|
// We don't care which bandwidth observer that delivers the REMB.
|
|
second_bandwidth_observer->OnReceivedEstimatedBitrate(250000);
|
|
EXPECT_EQ(250000u, bitrate_observer.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
|
|
// Min cap.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
|
|
EXPECT_EQ(100000u, bitrate_observer.last_bitrate_);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer);
|
|
delete second_bandwidth_observer;
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, OneBitrateObserverMultipleReportBlocks) {
|
|
TestBitrateObserver bitrate_observer;
|
|
uint32_t sequence_number[2] = {0, 0xFF00};
|
|
const uint32_t kStartBitrate = 200000;
|
|
const uint32_t kMinBitrate = 100000;
|
|
const uint32_t kMaxBitrate = 300000;
|
|
controller_->SetBitrateObserver(&bitrate_observer, kStartBitrate, kMinBitrate,
|
|
kMaxBitrate);
|
|
|
|
// REMBs during the first 2 seconds apply immediately.
|
|
int64_t time_ms = 1001;
|
|
webrtc::ReportBlockList report_blocks;
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(kStartBitrate);
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
report_blocks.clear();
|
|
time_ms += 2000;
|
|
|
|
// Receive a high REMB, test bitrate increase.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
|
|
|
|
uint32_t last_bitrate = 0;
|
|
// Ramp up to max bitrate.
|
|
for (int i = 0; i < 6; ++i) {
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
|
|
report_blocks.push_back(CreateReportBlock(1, 3, 0, sequence_number[1]));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50,
|
|
time_ms);
|
|
EXPECT_GT(bitrate_observer.last_bitrate_, last_bitrate);
|
|
EXPECT_EQ(0, bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
last_bitrate = bitrate_observer.last_bitrate_;
|
|
time_ms += 1000;
|
|
sequence_number[0] += 20;
|
|
sequence_number[1] += 1;
|
|
report_blocks.clear();
|
|
}
|
|
|
|
EXPECT_EQ(kMaxBitrate, bitrate_observer.last_bitrate_);
|
|
|
|
// Packet loss on the first stream. Verify that bitrate decreases.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 50, sequence_number[0]));
|
|
report_blocks.push_back(CreateReportBlock(1, 3, 0, sequence_number[1]));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_LT(bitrate_observer.last_bitrate_, last_bitrate);
|
|
EXPECT_EQ(WeightedLoss(20, 50, 1, 0), bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
last_bitrate = bitrate_observer.last_bitrate_;
|
|
sequence_number[0] += 20;
|
|
sequence_number[1] += 20;
|
|
time_ms += 1000;
|
|
report_blocks.clear();
|
|
|
|
// Packet loss on the second stream. Verify that bitrate decreases.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
|
|
report_blocks.push_back(CreateReportBlock(1, 3, 75, sequence_number[1]));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_LT(bitrate_observer.last_bitrate_, last_bitrate);
|
|
EXPECT_EQ(WeightedLoss(20, 0, 20, 75), bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
last_bitrate = bitrate_observer.last_bitrate_;
|
|
sequence_number[0] += 20;
|
|
sequence_number[1] += 1;
|
|
time_ms += 1000;
|
|
report_blocks.clear();
|
|
|
|
// All packets lost on stream with few packets, no back-off.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 1, sequence_number[0]));
|
|
report_blocks.push_back(CreateReportBlock(1, 3, 255, sequence_number[1]));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(bitrate_observer.last_bitrate_, last_bitrate);
|
|
EXPECT_EQ(WeightedLoss(20, 1, 1, 255), bitrate_observer.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer.last_rtt_);
|
|
last_bitrate = bitrate_observer.last_bitrate_;
|
|
sequence_number[0] += 20;
|
|
sequence_number[1] += 1;
|
|
report_blocks.clear();
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, TwoBitrateObserversOneRtcpObserver) {
|
|
TestBitrateObserver bitrate_observer_1;
|
|
TestBitrateObserver bitrate_observer_2;
|
|
controller_->SetBitrateObserver(&bitrate_observer_2, 200000, 200000, 300000);
|
|
controller_->SetBitrateObserver(&bitrate_observer_1, 200000, 100000, 300000);
|
|
|
|
// REMBs during the first 2 seconds apply immediately.
|
|
int64_t time_ms = 1001;
|
|
webrtc::ReportBlockList report_blocks;
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 1));
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
|
|
EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer_1.last_fraction_loss_);
|
|
EXPECT_EQ(0, bitrate_observer_1.last_rtt_);
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
report_blocks.clear();
|
|
time_ms += 2000;
|
|
|
|
// Receive a high remb, test bitrate inc.
|
|
// Test too low start bitrate, hence lower than sum of min.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
|
|
|
|
// Test bitrate increase 8% per second, distributed equally.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(112500u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer_1.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer_1.last_rtt_);
|
|
time_ms += 1000;
|
|
|
|
EXPECT_EQ(212500u, bitrate_observer_2.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer_2.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer_2.last_rtt_);
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(126000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(226000u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 61));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(140580u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(240580u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
// Check that the bitrate sum honor our REMB.
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 101));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(150000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(250000u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
// Remove REMB cap, higher than sum of max.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(700000);
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 121));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(166500u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(266500u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 141));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(184320u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(284320u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 161));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(207130u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_); // Max cap.
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 181));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(248700u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 201));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(293596u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_);
|
|
time_ms += 1000;
|
|
|
|
report_blocks.clear();
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 221));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
|
|
EXPECT_EQ(300000u, bitrate_observer_1.last_bitrate_); // Max cap.
|
|
EXPECT_EQ(300000u, bitrate_observer_2.last_bitrate_);
|
|
|
|
// Test that a low REMB trigger immediately.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(350000);
|
|
EXPECT_EQ(125000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer_1.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer_1.last_rtt_);
|
|
EXPECT_EQ(225000u, bitrate_observer_2.last_bitrate_);
|
|
EXPECT_EQ(0, bitrate_observer_2.last_fraction_loss_);
|
|
EXPECT_EQ(50, bitrate_observer_2.last_rtt_);
|
|
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
|
|
EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_); // Min cap.
|
|
EXPECT_EQ(200000u, bitrate_observer_2.last_bitrate_); // Min cap.
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_1);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_2);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, SetReservedBitrate) {
|
|
TestBitrateObserver bitrate_observer;
|
|
controller_->SetBitrateObserver(&bitrate_observer, 200000, 100000, 300000);
|
|
|
|
// Receive successively lower REMBs, verify the reserved bitrate is deducted.
|
|
|
|
controller_->SetReservedBitrate(0);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
|
|
EXPECT_EQ(200000u, bitrate_observer.last_bitrate_);
|
|
controller_->SetReservedBitrate(50000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
|
|
EXPECT_EQ(150000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetReservedBitrate(0);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
|
|
EXPECT_EQ(200000u, bitrate_observer.last_bitrate_);
|
|
controller_->SetReservedBitrate(50000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
|
|
EXPECT_EQ(150000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetReservedBitrate(0);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
|
|
EXPECT_EQ(200000u, bitrate_observer.last_bitrate_);
|
|
controller_->SetReservedBitrate(30000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
|
|
EXPECT_EQ(170000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetReservedBitrate(0);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(160000);
|
|
EXPECT_EQ(160000u, bitrate_observer.last_bitrate_);
|
|
controller_->SetReservedBitrate(30000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(160000);
|
|
EXPECT_EQ(130000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetReservedBitrate(0);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
|
|
EXPECT_EQ(120000u, bitrate_observer.last_bitrate_);
|
|
controller_->SetReservedBitrate(10000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
|
|
EXPECT_EQ(110000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetReservedBitrate(0);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
|
|
EXPECT_EQ(120000u, bitrate_observer.last_bitrate_);
|
|
controller_->SetReservedBitrate(50000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
|
|
EXPECT_EQ(100000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->SetReservedBitrate(10000);
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(0);
|
|
EXPECT_EQ(100000u, bitrate_observer.last_bitrate_);
|
|
|
|
controller_->RemoveBitrateObserver(&bitrate_observer);
|
|
}
|
|
|
|
class BitrateControllerTestNoEnforceMin : public BitrateControllerTest {
|
|
protected:
|
|
BitrateControllerTestNoEnforceMin() : BitrateControllerTest() {
|
|
enforce_min_bitrate_ = false;
|
|
}
|
|
};
|
|
|
|
// The following three tests verify that the EnforceMinBitrate() method works
|
|
// as intended.
|
|
TEST_F(BitrateControllerTestNoEnforceMin, OneBitrateObserver) {
|
|
TestBitrateObserver bitrate_observer_1;
|
|
controller_->SetBitrateObserver(&bitrate_observer_1, 200000, 100000, 400000);
|
|
|
|
// High REMB.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(150000);
|
|
EXPECT_EQ(150000u, bitrate_observer_1.last_bitrate_);
|
|
|
|
// Low REMB.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(10000);
|
|
EXPECT_EQ(10000u, bitrate_observer_1.last_bitrate_);
|
|
|
|
// Keeps at least 10 kbps.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(9000);
|
|
EXPECT_EQ(10000u, bitrate_observer_1.last_bitrate_);
|
|
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_1);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTestNoEnforceMin, SetReservedBitrate) {
|
|
TestBitrateObserver bitrate_observer_1;
|
|
controller_->SetBitrateObserver(&bitrate_observer_1, 200000, 100000, 400000);
|
|
controller_->SetReservedBitrate(10000);
|
|
|
|
// High REMB.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(150000);
|
|
EXPECT_EQ(140000u, bitrate_observer_1.last_bitrate_);
|
|
|
|
// Low REMB.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(15000);
|
|
EXPECT_EQ(5000u, bitrate_observer_1.last_bitrate_);
|
|
|
|
// Keeps at least 10 kbps.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(9000);
|
|
EXPECT_EQ(0u, bitrate_observer_1.last_bitrate_);
|
|
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_1);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTestNoEnforceMin, ThreeBitrateObservers) {
|
|
TestBitrateObserver bitrate_observer_1;
|
|
TestBitrateObserver bitrate_observer_2;
|
|
TestBitrateObserver bitrate_observer_3;
|
|
// Set up the observers with min bitrates at 100000, 200000, and 300000.
|
|
// Note: The start bitrate of bitrate_observer_1 (700000) is used as the
|
|
// overall start bitrate.
|
|
controller_->SetBitrateObserver(&bitrate_observer_1, 700000, 100000, 400000);
|
|
controller_->SetBitrateObserver(&bitrate_observer_2, 200000, 200000, 400000);
|
|
controller_->SetBitrateObserver(&bitrate_observer_3, 200000, 300000, 400000);
|
|
|
|
// High REMB. Make sure the controllers get a fair share of the surplus
|
|
// (i.e., what is left after each controller gets its min rate).
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(690000);
|
|
// Verify that each observer gets its min rate (sum of min rates is 600000),
|
|
// and that the remaining 90000 is divided equally among the three.
|
|
EXPECT_EQ(130000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(230000u, bitrate_observer_2.last_bitrate_);
|
|
EXPECT_EQ(330000u, bitrate_observer_3.last_bitrate_);
|
|
|
|
// High REMB, but below the sum of min bitrates.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(500000);
|
|
// Verify that the first and second observers get their min bitrates, and the
|
|
// third gets the remainder.
|
|
EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_); // Min bitrate.
|
|
EXPECT_EQ(200000u, bitrate_observer_2.last_bitrate_); // Min bitrate.
|
|
EXPECT_EQ(200000u, bitrate_observer_3.last_bitrate_); // Remainder.
|
|
|
|
// Low REMB.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(10000);
|
|
// Verify that the first observer gets all the rate, and the rest get zero.
|
|
EXPECT_EQ(10000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(0u, bitrate_observer_2.last_bitrate_);
|
|
EXPECT_EQ(0u, bitrate_observer_3.last_bitrate_);
|
|
|
|
// Verify it keeps an estimate of at least 10kbps.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(9000);
|
|
EXPECT_EQ(10000u, bitrate_observer_1.last_bitrate_);
|
|
EXPECT_EQ(0u, bitrate_observer_2.last_bitrate_);
|
|
EXPECT_EQ(0u, bitrate_observer_3.last_bitrate_);
|
|
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_1);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_2);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_3);
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, ThreeBitrateObserversLowRembEnforceMin) {
|
|
TestBitrateObserver bitrate_observer_1;
|
|
TestBitrateObserver bitrate_observer_2;
|
|
TestBitrateObserver bitrate_observer_3;
|
|
controller_->SetBitrateObserver(&bitrate_observer_1, 200000, 100000, 300000);
|
|
controller_->SetBitrateObserver(&bitrate_observer_2, 200000, 200000, 300000);
|
|
controller_->SetBitrateObserver(&bitrate_observer_3, 200000, 300000, 300000);
|
|
|
|
// Low REMB. Verify that all observers still get their respective min bitrate.
|
|
bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
|
|
EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_); // Min cap.
|
|
EXPECT_EQ(200000u, bitrate_observer_2.last_bitrate_); // Min cap.
|
|
EXPECT_EQ(300000u, bitrate_observer_3.last_bitrate_); // Min cap.
|
|
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_1);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_2);
|
|
controller_->RemoveBitrateObserver(&bitrate_observer_3);
|
|
}
|