52200d0b7f
This includes if RTCP is received, but the number of packets received by the other end hasn't increased. Further, if no RTCP is received for more than 3 feedback intervals (3 seconds) we start reducing the estimate by 20%. This is put under an experiment. BUG=webrtc:6238 R=terelius@webrtc.org Review URL: https://codereview.webrtc.org/2262213002 . Cr-Commit-Position: refs/heads/master@{#14306}
515 lines
20 KiB
C++
515 lines
20 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 <algorithm>
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#include <vector>
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#include "testing/gtest/include/gtest/gtest.h"
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#include "webrtc/call/mock/mock_rtc_event_log.h"
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#include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
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#include "webrtc/modules/pacing/mock/mock_paced_sender.h"
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#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "webrtc/test/field_trial.h"
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using ::testing::Exactly;
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using ::testing::Return;
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using webrtc::BitrateController;
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using webrtc::BitrateObserver;
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using webrtc::PacedSender;
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using webrtc::RtcpBandwidthObserver;
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uint8_t WeightedLoss(int num_packets1, uint8_t fraction_loss1,
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int num_packets2, uint8_t fraction_loss2) {
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int weighted_sum = num_packets1 * fraction_loss1 +
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num_packets2 * fraction_loss2;
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int total_num_packets = num_packets1 + num_packets2;
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return (weighted_sum + total_num_packets / 2) / total_num_packets;
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}
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webrtc::RTCPReportBlock CreateReportBlock(
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uint32_t remote_ssrc, uint32_t source_ssrc,
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uint8_t fraction_lost, uint32_t extended_high_sequence_number) {
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return webrtc::RTCPReportBlock(remote_ssrc, source_ssrc, fraction_lost, 0,
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extended_high_sequence_number, 0, 0, 0);
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}
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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(uint32_t bitrate,
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uint8_t fraction_loss,
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int64_t rtt) {
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last_bitrate_ = static_cast<int>(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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int last_bitrate_;
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uint8_t last_fraction_loss_;
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int64_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() : clock_(0) {}
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~BitrateControllerTest() {}
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virtual void SetUp() {
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controller_.reset(BitrateController::CreateBitrateController(
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&clock_, &bitrate_observer_, &event_log_));
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controller_->SetStartBitrate(kStartBitrateBps);
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EXPECT_EQ(kStartBitrateBps, bitrate_observer_.last_bitrate_);
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controller_->SetMinMaxBitrate(kMinBitrateBps, kMaxBitrateBps);
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EXPECT_EQ(kStartBitrateBps, bitrate_observer_.last_bitrate_);
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bandwidth_observer_.reset(controller_->CreateRtcpBandwidthObserver());
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}
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virtual void TearDown() {
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}
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const int kMinBitrateBps = 100000;
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const int kStartBitrateBps = 200000;
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const int kMaxBitrateBps = 300000;
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const int kDefaultMinBitrateBps = 10000;
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const int kDefaultMaxBitrateBps = 1000000000;
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webrtc::SimulatedClock clock_;
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TestBitrateObserver bitrate_observer_;
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std::unique_ptr<BitrateController> controller_;
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std::unique_ptr<RtcpBandwidthObserver> bandwidth_observer_;
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testing::NiceMock<webrtc::MockRtcEventLog> event_log_;
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};
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TEST_F(BitrateControllerTest, DefaultMinMaxBitrate) {
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// Receive successively lower REMBs, verify the reserved bitrate is deducted.
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controller_->SetMinMaxBitrate(0, 0);
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EXPECT_EQ(kStartBitrateBps, bitrate_observer_.last_bitrate_);
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bandwidth_observer_->OnReceivedEstimatedBitrate(kDefaultMinBitrateBps / 2);
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EXPECT_EQ(kDefaultMinBitrateBps, bitrate_observer_.last_bitrate_);
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bandwidth_observer_->OnReceivedEstimatedBitrate(2 * kDefaultMaxBitrateBps);
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clock_.AdvanceTimeMilliseconds(1000);
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controller_->Process();
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EXPECT_EQ(kDefaultMaxBitrateBps, bitrate_observer_.last_bitrate_);
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}
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TEST_F(BitrateControllerTest, OneBitrateObserverOneRtcpObserver) {
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// First REMB applies immediately.
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int64_t time_ms = 1001;
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webrtc::ReportBlockList report_blocks;
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 1));
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bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
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EXPECT_EQ(200000, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(0, bitrate_observer_.last_rtt_);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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report_blocks.clear();
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time_ms += 2000;
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// Receive a high remb, test bitrate inc.
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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// Test bitrate increase 8% per second.
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(217000, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(235360, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 61));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(255189, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 81));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(276604, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 101));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(299732, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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// Reach max cap.
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 121));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(300000, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 141));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(300000, bitrate_observer_.last_bitrate_);
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// Test that a low delay-based estimate limits the combined estimate.
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controller_->OnReceiveBitrateChanged({0}, 280000);
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EXPECT_EQ(280000, bitrate_observer_.last_bitrate_);
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// Test that a low REMB limits the combined estimate.
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bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
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EXPECT_EQ(250000, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
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EXPECT_EQ(100000, bitrate_observer_.last_bitrate_);
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}
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TEST_F(BitrateControllerTest, OneBitrateObserverTwoRtcpObservers) {
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const uint32_t kSsrc1 = 1;
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const uint32_t kSsrc2 = 2;
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// REMBs during the first 2 seconds apply immediately.
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int64_t time_ms = 1;
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webrtc::ReportBlockList report_blocks;
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report_blocks.push_back(CreateReportBlock(kSsrc1, 2, 0, 1));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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report_blocks.clear();
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time_ms += 500;
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RtcpBandwidthObserver* second_bandwidth_observer =
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controller_->CreateRtcpBandwidthObserver();
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// Test start bitrate.
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report_blocks.push_back(CreateReportBlock(2, 2, 0, 21));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 100, 1);
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EXPECT_EQ(200000, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(100, bitrate_observer_.last_rtt_);
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time_ms += 500;
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// Test bitrate increase 8% per second.
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc1, 2, 0, 21));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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time_ms += 500;
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report_blocks.front().remoteSSRC = kSsrc2;
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 100, time_ms);
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EXPECT_EQ(217000, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(100, bitrate_observer_.last_rtt_);
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time_ms += 500;
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// Extra report should not change estimate.
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc2, 2, 0, 31));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 100, time_ms);
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EXPECT_EQ(217000, bitrate_observer_.last_bitrate_);
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time_ms += 500;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc1, 2, 0, 41));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(235360, bitrate_observer_.last_bitrate_);
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// Second report should not change estimate.
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc2, 2, 0, 41));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 100, time_ms);
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EXPECT_EQ(235360, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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// Reports from only one bandwidth observer is ok.
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc2, 2, 0, 61));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 50, time_ms);
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EXPECT_EQ(255189, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc2, 2, 0, 81));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 50, time_ms);
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EXPECT_EQ(276604, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc2, 2, 0, 121));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 50, time_ms);
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EXPECT_EQ(299732, bitrate_observer_.last_bitrate_);
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time_ms += 1000;
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// Reach max cap.
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report_blocks.clear();
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report_blocks.push_back(CreateReportBlock(kSsrc2, 2, 0, 141));
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second_bandwidth_observer->OnReceivedRtcpReceiverReport(
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report_blocks, 50, time_ms);
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EXPECT_EQ(300000, bitrate_observer_.last_bitrate_);
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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(250000, bitrate_observer_.last_bitrate_);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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// Min cap.
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bandwidth_observer_->OnReceivedEstimatedBitrate(1000);
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EXPECT_EQ(100000, bitrate_observer_.last_bitrate_);
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delete second_bandwidth_observer;
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}
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TEST_F(BitrateControllerTest, OneBitrateObserverMultipleReportBlocks) {
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uint32_t sequence_number[2] = {0, 0xFF00};
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const int kStartBitrate = 200000;
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const int kMinBitrate = 100000;
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const int kMaxBitrate = 300000;
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controller_->SetStartBitrate(kStartBitrate);
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controller_->SetMinMaxBitrate(kMinBitrate, kMaxBitrate);
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// REMBs during the first 2 seconds apply immediately.
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int64_t time_ms = 1001;
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webrtc::ReportBlockList report_blocks;
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report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
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bandwidth_observer_->OnReceivedEstimatedBitrate(kStartBitrate);
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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report_blocks.clear();
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time_ms += 2000;
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// Receive a high REMB, test bitrate increase.
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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int last_bitrate = 0;
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// Ramp up to max bitrate.
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for (int i = 0; i < 7; ++i) {
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report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
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report_blocks.push_back(CreateReportBlock(1, 3, 0, sequence_number[1]));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50,
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time_ms);
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EXPECT_GT(bitrate_observer_.last_bitrate_, last_bitrate);
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EXPECT_EQ(0, bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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last_bitrate = bitrate_observer_.last_bitrate_;
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time_ms += 1000;
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sequence_number[0] += 20;
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sequence_number[1] += 1;
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report_blocks.clear();
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}
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EXPECT_EQ(kMaxBitrate, bitrate_observer_.last_bitrate_);
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// Packet loss on the first stream. Verify that bitrate decreases.
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report_blocks.push_back(CreateReportBlock(1, 2, 50, sequence_number[0]));
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report_blocks.push_back(CreateReportBlock(1, 3, 0, sequence_number[1]));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_LT(bitrate_observer_.last_bitrate_, last_bitrate);
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EXPECT_EQ(WeightedLoss(20, 50, 1, 0), bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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last_bitrate = bitrate_observer_.last_bitrate_;
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sequence_number[0] += 20;
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sequence_number[1] += 20;
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time_ms += 1000;
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report_blocks.clear();
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// Packet loss on the second stream. Verify that bitrate decreases.
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report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
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report_blocks.push_back(CreateReportBlock(1, 3, 75, sequence_number[1]));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_LT(bitrate_observer_.last_bitrate_, last_bitrate);
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EXPECT_EQ(WeightedLoss(20, 0, 20, 75), bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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last_bitrate = bitrate_observer_.last_bitrate_;
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sequence_number[0] += 20;
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sequence_number[1] += 1;
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time_ms += 1000;
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report_blocks.clear();
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// All packets lost on stream with few packets, no back-off.
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report_blocks.push_back(CreateReportBlock(1, 2, 1, sequence_number[0]));
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report_blocks.push_back(CreateReportBlock(1, 3, 255, sequence_number[1]));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
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EXPECT_EQ(bitrate_observer_.last_bitrate_, last_bitrate);
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EXPECT_EQ(WeightedLoss(20, 1, 1, 255), bitrate_observer_.last_fraction_loss_);
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EXPECT_EQ(50, bitrate_observer_.last_rtt_);
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last_bitrate = bitrate_observer_.last_bitrate_;
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sequence_number[0] += 20;
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sequence_number[1] += 1;
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report_blocks.clear();
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}
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TEST_F(BitrateControllerTest, SetReservedBitrate) {
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// Receive successively lower REMBs, verify the reserved bitrate is deducted.
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controller_->SetReservedBitrate(0);
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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EXPECT_EQ(200000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(50000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(400000);
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EXPECT_EQ(150000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(0);
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bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
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EXPECT_EQ(200000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(50000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(250000);
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EXPECT_EQ(150000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(0);
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bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
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EXPECT_EQ(200000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(30000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(200000);
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EXPECT_EQ(170000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(0);
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bandwidth_observer_->OnReceivedEstimatedBitrate(160000);
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EXPECT_EQ(160000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(30000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(160000);
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EXPECT_EQ(130000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(0);
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bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
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EXPECT_EQ(120000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(10000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
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EXPECT_EQ(110000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(0);
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bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
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EXPECT_EQ(120000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(50000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(120000);
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// Limited by min bitrate.
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EXPECT_EQ(100000, bitrate_observer_.last_bitrate_);
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controller_->SetReservedBitrate(10000);
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bandwidth_observer_->OnReceivedEstimatedBitrate(1);
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EXPECT_EQ(100000, bitrate_observer_.last_bitrate_);
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}
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TEST_F(BitrateControllerTest, TimeoutsWithoutFeedback) {
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{
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webrtc::test::ScopedFieldTrials override_field_trials(
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"WebRTC-SendSideBwe/Enabled/");
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SetUp();
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int expected_bitrate_bps = 300000;
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controller_->SetBitrates(300000, kDefaultMinBitrateBps,
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kDefaultMaxBitrateBps);
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|
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webrtc::ReportBlockList report_blocks;
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 1));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(
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report_blocks, 50, clock_.TimeInMilliseconds());
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EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
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clock_.AdvanceTimeMilliseconds(500);
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|
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report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(
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report_blocks, 50, clock_.TimeInMilliseconds());
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|
report_blocks.clear();
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|
expected_bitrate_bps = expected_bitrate_bps * 1.08 + 1000;
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EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
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clock_.AdvanceTimeMilliseconds(1500);
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|
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
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bandwidth_observer_->OnReceivedRtcpReceiverReport(
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|
report_blocks, 50, clock_.TimeInMilliseconds());
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|
expected_bitrate_bps = expected_bitrate_bps * 1.08 + 1000;
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|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
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|
clock_.AdvanceTimeMilliseconds(1000);
|
|
|
|
// 1 seconds since feedback, expect increase.
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|
controller_->Process();
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|
expected_bitrate_bps = expected_bitrate_bps * 1.08 + 1000;
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(800);
|
|
|
|
// 1.8 seconds since feedback, expect no increase.
|
|
controller_->Process();
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|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
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|
clock_.AdvanceTimeMilliseconds(3701);
|
|
|
|
// More than 4.5 seconds since feedback, expect decrease.
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|
controller_->Process();
|
|
expected_bitrate_bps *= 0.8;
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(500);
|
|
|
|
// Only one timeout every second.
|
|
controller_->Process();
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(501);
|
|
|
|
// New timeout allowed.
|
|
controller_->Process();
|
|
expected_bitrate_bps *= 0.8;
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
}
|
|
}
|
|
|
|
TEST_F(BitrateControllerTest, StopIncreaseWithoutPacketReports) {
|
|
int expected_bitrate_bps = 300000;
|
|
controller_->SetBitrates(300000, kDefaultMinBitrateBps,
|
|
kDefaultMaxBitrateBps);
|
|
|
|
webrtc::ReportBlockList report_blocks;
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 1));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, clock_.TimeInMilliseconds());
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(500);
|
|
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, clock_.TimeInMilliseconds());
|
|
report_blocks.clear();
|
|
expected_bitrate_bps = expected_bitrate_bps * 1.08 + 1000;
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(1500);
|
|
|
|
// 1.2 seconds without packets reported as received, no increase.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 21));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, clock_.TimeInMilliseconds());
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(1000);
|
|
|
|
// 5 packets reported as received since last, too few, no increase.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 26));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, clock_.TimeInMilliseconds());
|
|
report_blocks.clear();
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(100);
|
|
|
|
// 15 packets reported as received since last, enough to increase.
|
|
report_blocks.push_back(CreateReportBlock(1, 2, 0, 41));
|
|
bandwidth_observer_->OnReceivedRtcpReceiverReport(
|
|
report_blocks, 50, clock_.TimeInMilliseconds());
|
|
expected_bitrate_bps = expected_bitrate_bps * 1.08 + 1000;
|
|
EXPECT_EQ(expected_bitrate_bps, bitrate_observer_.last_bitrate_);
|
|
clock_.AdvanceTimeMilliseconds(1000);
|
|
}
|