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/*
* Copyright 2019 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 "test/network/feedback_generator.h"
#include <cstddef>
#include <memory>
#include <utility>
#include <vector>
#include "absl/memory/memory.h"
#include "api/environment/environment.h"
#include "api/environment/environment_factory.h"
#include "api/rtc_event_log/rtc_event_log.h"
#include "api/rtc_event_log/rtc_event_log_factory.h"
#include "api/rtp_parameters.h"
#include "api/test/create_network_emulation_manager.h"
#include "api/test/network_emulation_manager.h"
#include "api/test/simulated_network.h"
#include "api/transport/network_types.h"
#include "api/transport/test/feedback_generator_interface.h"
#include "api/units/data_rate.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "logging/rtc_event_log/events/rtc_event_rtcp_packet_incoming.h"
#include "logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.h"
#include "modules/rtp_rtcp/include/rtp_header_extension_map.h"
#include "modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h"
#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
#include "modules/rtp_rtcp/source/rtp_packet_to_send.h"
#include "rtc_base/checks.h"
#include "test/network/network_emulation.h"
#include "test/network/simulated_network.h"
namespace webrtc {
namespace {
Environment GetEnvironment(NetworkEmulationManager& net) {
EnvironmentFactory factory;
factory.Set(net.time_controller()->GetClock());
factory.Set(net.time_controller()->GetTaskQueueFactory());
return factory.Create();
}
EmulatedRoute* CreateRoute(NetworkEmulationManager& net,
std::vector<EmulatedNetworkNode*> link) {
if (!link.empty()) {
return net.CreateRoute(link);
} else {
return net.CreateRoute({net.CreateUnconstrainedEmulatedNode()});
}
}
} // namespace
FeedbackGeneratorWithoutNetworkImpl::FeedbackGeneratorWithoutNetworkImpl(
Config config,
NetworkEmulationManager& net)
: net_(net),
feedback_interval_(config.feedback_interval),
feedback_packet_size_(config.feedback_packet_size),
event_log_(RtcEventLogFactory().Create(GetEnvironment(net))),
route_(this,
CreateRoute(net, std::move(config.sent_via_nodes)),
CreateRoute(net, std::move(config.received_via_nodes))) {
RtpExtension transport_sequence_number_extension;
transport_sequence_number_extension.uri =
RtpExtension::kTransportSequenceNumberUri;
transport_sequence_number_extension.id = 1;
transport_sequence_number_extension.encrypt = false;
rtp_extensions_.RegisterByUri(transport_sequence_number_extension.id,
transport_sequence_number_extension.uri);
}
void FeedbackGeneratorWithoutNetworkImpl::SendPacket(size_t total_size,
size_t overhead) {
SentPacket sent;
sent.send_time = Now();
sent.size = DataSize::Bytes(total_size);
sent.sequence_number = sequence_number_++;
sent_packets_.push(sent);
RtpPacketToSend packet_to_send(&rtp_extensions_);
packet_to_send.set_transport_sequence_number(sent.sequence_number);
packet_to_send.SetExtension<TransportSequenceNumber>(sent.sequence_number);
RTC_DCHECK(total_size > packet_to_send.headers_size() + overhead);
if (total_size > packet_to_send.headers_size() + overhead) {
packet_to_send.SetPayloadSize(total_size - packet_to_send.headers_size() -
overhead);
RTC_DCHECK_EQ(packet_to_send.size(), total_size - overhead);
}
event_log_->Log(std::make_unique<RtcEventRtpPacketOutgoing>(
packet_to_send, /*probe_cluster_id*/ 0));
route_.SendRequest(total_size, sent);
}
std::vector<TransportPacketsFeedback>
FeedbackGeneratorWithoutNetworkImpl::PopFeedback() {
std::vector<TransportPacketsFeedback> ret;
ret.swap(feedback_);
return ret;
}
Timestamp FeedbackGeneratorWithoutNetworkImpl::Now() {
return net_.time_controller()->GetClock()->CurrentTime();
}
void FeedbackGeneratorWithoutNetworkImpl::OnRequest(SentPacket packet,
Timestamp arrival_time) {
PacketResult result;
result.sent_packet = packet;
result.receive_time = arrival_time;
received_packets_.push_back(result);
Timestamp first_recv = received_packets_.front().receive_time;
if (Now() - first_recv > feedback_interval_) {
route_.SendResponse(feedback_packet_size_.bytes<size_t>(),
std::move(received_packets_));
received_packets_ = {};
}
}
void FeedbackGeneratorWithoutNetworkImpl::OnResponse(
std::vector<PacketResult> packet_results,
Timestamp arrival_time) {
TransportPacketsFeedback feedback;
feedback.feedback_time = arrival_time;
std::vector<PacketResult>::const_iterator received_packet_iterator =
packet_results.begin();
while (received_packet_iterator != packet_results.end()) {
RTC_DCHECK(!sent_packets_.empty() &&
sent_packets_.front().sequence_number <=
received_packet_iterator->sent_packet.sequence_number)
<< "reordering not implemented";
if (sent_packets_.front().sequence_number <
received_packet_iterator->sent_packet.sequence_number) {
// Packet lost.
PacketResult lost;
lost.sent_packet = sent_packets_.front();
feedback.packet_feedbacks.push_back(lost);
}
if (sent_packets_.front().sequence_number ==
received_packet_iterator->sent_packet.sequence_number) {
feedback.packet_feedbacks.push_back(*received_packet_iterator);
++received_packet_iterator;
}
sent_packets_.pop();
}
rtcp::TransportFeedback transport_feedback;
transport_feedback.SetBase(
feedback.ReceivedWithSendInfo()[0].sent_packet.sequence_number,
feedback.ReceivedWithSendInfo()[0].receive_time);
for (const auto& received_packet : feedback.ReceivedWithSendInfo()) {
transport_feedback.AddReceivedPacket(
received_packet.sent_packet.sequence_number,
received_packet.receive_time);
}
event_log_->Log(
std::make_unique<RtcEventRtcpPacketIncoming>(transport_feedback.Build()));
feedback_.push_back(feedback);
}
FeedbackGeneratorImpl::FeedbackGeneratorImpl(
FeedbackGeneratorImpl::Config config)
: conf_(config),
net_(CreateNetworkEmulationManager({.time_mode = TimeMode::kSimulated})),
send_link_{new SimulatedNetwork(conf_.send_link)},
ret_link_{new SimulatedNetwork(conf_.return_link)},
delegate_({.sent_via_nodes = {net_->CreateEmulatedNode(
absl::WrapUnique(send_link_))},
.received_via_nodes = {net_->CreateEmulatedNode(
absl::WrapUnique(ret_link_))},
.feedback_interval = config.feedback_interval,
.feedback_packet_size = config.feedback_packet_size},
*net_) {}
Timestamp FeedbackGeneratorImpl::Now() {
return delegate_.Now();
}
void FeedbackGeneratorImpl::Sleep(TimeDelta duration) {
net_->time_controller()->AdvanceTime(duration);
}
void FeedbackGeneratorImpl::SendPacket(size_t size) {
delegate_.SendPacket(size, /*overhead=*/0);
}
std::vector<TransportPacketsFeedback> FeedbackGeneratorImpl::PopFeedback() {
return delegate_.PopFeedback();
}
void FeedbackGeneratorImpl::SetSendConfig(BuiltInNetworkBehaviorConfig config) {
conf_.send_link = config;
send_link_->SetConfig(conf_.send_link);
}
void FeedbackGeneratorImpl::SetReturnConfig(
BuiltInNetworkBehaviorConfig config) {
conf_.return_link = config;
ret_link_->SetConfig(conf_.return_link);
}
void FeedbackGeneratorImpl::SetSendLinkCapacity(DataRate capacity) {
conf_.send_link.link_capacity = capacity;
send_link_->SetConfig(conf_.send_link);
}
} // namespace webrtc
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