| /* |
| * Copyright (c) 2013 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 "webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h" |
| |
| #include <stdio.h> |
| |
| #include <sstream> |
| |
| namespace webrtc { |
| namespace testing { |
| namespace bwe { |
| |
| const int kMinBitrateKbps = 10; |
| const int kMaxBitrateKbps = 20000; |
| |
| class DelayCapHelper { |
| public: |
| DelayCapHelper() : max_delay_us_(0), delay_stats_() {} |
| |
| void SetMaxDelay(int max_delay_ms) { |
| BWE_TEST_LOGGING_ENABLE(false); |
| BWE_TEST_LOGGING_LOG1("Max Delay", "%d ms", static_cast<int>(max_delay_ms)); |
| assert(max_delay_ms >= 0); |
| max_delay_us_ = max_delay_ms * 1000; |
| } |
| |
| bool ShouldSendPacket(int64_t send_time_us, int64_t arrival_time_us) { |
| int64_t packet_delay_us = send_time_us - arrival_time_us; |
| delay_stats_.Push(std::min(packet_delay_us, max_delay_us_) / 1000); |
| return (max_delay_us_ == 0 || max_delay_us_ >= packet_delay_us); |
| } |
| |
| const Stats<double>& delay_stats() const { |
| return delay_stats_; |
| } |
| |
| private: |
| int64_t max_delay_us_; |
| Stats<double> delay_stats_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DelayCapHelper); |
| }; |
| |
| const FlowIds CreateFlowIds(const int *flow_ids_array, size_t num_flow_ids) { |
| FlowIds flow_ids(&flow_ids_array[0], flow_ids_array + num_flow_ids); |
| return flow_ids; |
| } |
| |
| class RateCounter { |
| public: |
| RateCounter() |
| : kWindowSizeUs(1000000), |
| packets_per_second_(0), |
| bytes_per_second_(0), |
| last_accumulated_us_(0), |
| window_() {} |
| |
| void UpdateRates(int64_t send_time_us, uint32_t payload_size) { |
| packets_per_second_++; |
| bytes_per_second_ += payload_size; |
| last_accumulated_us_ = send_time_us; |
| window_.push_back(std::make_pair(send_time_us, payload_size)); |
| while (!window_.empty()) { |
| const TimeSizePair& packet = window_.front(); |
| if (packet.first > (last_accumulated_us_ - kWindowSizeUs)) { |
| break; |
| } |
| assert(packets_per_second_ >= 1); |
| assert(bytes_per_second_ >= packet.second); |
| packets_per_second_--; |
| bytes_per_second_ -= packet.second; |
| window_.pop_front(); |
| } |
| } |
| |
| uint32_t bits_per_second() const { |
| return bytes_per_second_ * 8; |
| } |
| uint32_t packets_per_second() const { return packets_per_second_; } |
| |
| private: |
| typedef std::pair<int64_t, uint32_t> TimeSizePair; |
| |
| const int64_t kWindowSizeUs; |
| uint32_t packets_per_second_; |
| uint32_t bytes_per_second_; |
| int64_t last_accumulated_us_; |
| std::list<TimeSizePair> window_; |
| }; |
| |
| Random::Random(uint32_t seed) |
| : a_(0x531FDB97 ^ seed), |
| b_(0x6420ECA8 + seed) { |
| } |
| |
| float Random::Rand() { |
| const float kScale = 1.0f / 0xffffffff; |
| float result = kScale * b_; |
| a_ ^= b_; |
| b_ += a_; |
| return result; |
| } |
| |
| int Random::Gaussian(int mean, int standard_deviation) { |
| // Creating a Normal distribution variable from two independent uniform |
| // variables based on the Box-Muller transform, which is defined on the |
| // interval (0, 1], hence the mask+add below. |
| const double kPi = 3.14159265358979323846; |
| const double kScale = 1.0 / 0x80000000ul; |
| double u1 = kScale * ((a_ & 0x7ffffffful) + 1); |
| double u2 = kScale * ((b_ & 0x7ffffffful) + 1); |
| a_ ^= b_; |
| b_ += a_; |
| return static_cast<int>(mean + standard_deviation * |
| sqrt(-2 * log(u1)) * cos(2 * kPi * u2)); |
| } |
| |
| Packet::Packet() |
| : flow_id_(0), creation_time_us_(-1), send_time_us_(-1), payload_size_(0) { |
| } |
| |
| Packet::Packet(int flow_id, int64_t send_time_us, size_t payload_size) |
| : flow_id_(flow_id), |
| creation_time_us_(send_time_us), |
| send_time_us_(send_time_us), |
| payload_size_(payload_size) { |
| } |
| |
| Packet::~Packet() { |
| } |
| |
| bool Packet::operator<(const Packet& rhs) const { |
| return send_time_us_ < rhs.send_time_us_; |
| } |
| |
| void Packet::set_send_time_us(int64_t send_time_us) { |
| assert(send_time_us >= 0); |
| send_time_us_ = send_time_us; |
| } |
| |
| MediaPacket::MediaPacket() { |
| memset(&header_, 0, sizeof(header_)); |
| } |
| |
| MediaPacket::MediaPacket(int flow_id, |
| int64_t send_time_us, |
| size_t payload_size, |
| const RTPHeader& header) |
| : Packet(flow_id, send_time_us, payload_size), header_(header) { |
| } |
| |
| MediaPacket::MediaPacket(int64_t send_time_us, uint32_t sequence_number) |
| : Packet(0, send_time_us, 0) { |
| memset(&header_, 0, sizeof(header_)); |
| header_.sequenceNumber = sequence_number; |
| } |
| |
| int64_t MediaPacket::GetAbsSendTimeInMs() const { |
| const int kInterArrivalShift = 26; |
| const int kAbsSendTimeInterArrivalUpshift = 8; |
| const double kTimestampToMs = |
| 1000.0 / static_cast<double>(1 << kInterArrivalShift); |
| uint32_t timestamp = header_.extension.absoluteSendTime |
| << kAbsSendTimeInterArrivalUpshift; |
| return static_cast<int64_t>(timestamp) * kTimestampToMs; |
| } |
| |
| void MediaPacket::SetAbsSendTimeMs(int64_t abs_send_time_ms) { |
| header_.extension.hasAbsoluteSendTime = true; |
| header_.extension.absoluteSendTime = ((static_cast<int64_t>(abs_send_time_ms * |
| (1 << 18)) + 500) / 1000) & 0x00fffffful; |
| } |
| |
| RembFeedback::RembFeedback(int flow_id, |
| int64_t send_time_us, |
| uint32_t estimated_bps, |
| RTCPReportBlock report_block) |
| : FeedbackPacket(flow_id, send_time_us), |
| estimated_bps_(estimated_bps), |
| report_block_(report_block) { |
| } |
| |
| SendSideBweFeedback::SendSideBweFeedback( |
| int flow_id, |
| int64_t send_time_us, |
| const std::vector<PacketInfo>& packet_feedback_vector) |
| : FeedbackPacket(flow_id, send_time_us), |
| packet_feedback_vector_(packet_feedback_vector) { |
| } |
| |
| bool IsTimeSorted(const Packets& packets) { |
| PacketsConstIt last_it = packets.begin(); |
| for (PacketsConstIt it = last_it; it != packets.end(); ++it) { |
| if (it != last_it && **it < **last_it) { |
| return false; |
| } |
| last_it = it; |
| } |
| return true; |
| } |
| |
| PacketProcessor::PacketProcessor(PacketProcessorListener* listener, |
| bool is_sender) |
| : listener_(listener) { |
| flow_ids_.insert(0); |
| if (listener_) { |
| listener_->AddPacketProcessor(this, is_sender); |
| } |
| } |
| |
| PacketProcessor::PacketProcessor(PacketProcessorListener* listener, |
| int flow_id, |
| bool is_sender) |
| : listener_(listener) { |
| flow_ids_.insert(flow_id); |
| if (listener_) { |
| listener_->AddPacketProcessor(this, is_sender); |
| } |
| } |
| |
| PacketProcessor::PacketProcessor(PacketProcessorListener* listener, |
| const FlowIds& flow_ids, |
| bool is_sender) |
| : listener_(listener), flow_ids_(flow_ids) { |
| if (listener_) { |
| listener_->AddPacketProcessor(this, is_sender); |
| } |
| } |
| |
| PacketProcessor::~PacketProcessor() { |
| if (listener_) { |
| listener_->RemovePacketProcessor(this); |
| } |
| } |
| |
| RateCounterFilter::RateCounterFilter(PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| rate_counter_(new RateCounter()), |
| packets_per_second_stats_(), |
| kbps_stats_(), |
| name_("") {} |
| |
| RateCounterFilter::RateCounterFilter(PacketProcessorListener* listener, |
| const std::string& name) |
| : PacketProcessor(listener, false), |
| rate_counter_(new RateCounter()), |
| packets_per_second_stats_(), |
| kbps_stats_(), |
| name_(name) {} |
| |
| RateCounterFilter::RateCounterFilter(PacketProcessorListener* listener, |
| const FlowIds& flow_ids, |
| const std::string& name) |
| : PacketProcessor(listener, flow_ids, false), |
| rate_counter_(new RateCounter()), |
| packets_per_second_stats_(), |
| kbps_stats_(), |
| name_(name) { |
| std::stringstream ss; |
| ss << name_ << "_"; |
| for (int flow_id : flow_ids) { |
| ss << flow_id << ","; |
| } |
| name_ = ss.str(); |
| } |
| |
| RateCounterFilter::~RateCounterFilter() { |
| LogStats(); |
| } |
| |
| uint32_t RateCounterFilter::packets_per_second() const { |
| return rate_counter_->packets_per_second(); |
| } |
| |
| uint32_t RateCounterFilter::bits_per_second() const { |
| return rate_counter_->bits_per_second(); |
| } |
| |
| void RateCounterFilter::LogStats() { |
| BWE_TEST_LOGGING_CONTEXT("RateCounterFilter"); |
| packets_per_second_stats_.Log("pps"); |
| kbps_stats_.Log("kbps"); |
| } |
| |
| Stats<double> RateCounterFilter::GetBitrateStats() const { |
| return kbps_stats_; |
| } |
| |
| void RateCounterFilter::Plot(int64_t timestamp_ms) { |
| BWE_TEST_LOGGING_CONTEXT(name_.c_str()); |
| BWE_TEST_LOGGING_PLOT("Throughput_#1", timestamp_ms, |
| rate_counter_->bits_per_second() / 1000.0); |
| } |
| |
| void RateCounterFilter::RunFor(int64_t /*time_ms*/, Packets* in_out) { |
| assert(in_out); |
| for (const Packet* packet : *in_out) { |
| rate_counter_->UpdateRates(packet->send_time_us(), packet->payload_size()); |
| } |
| packets_per_second_stats_.Push(rate_counter_->packets_per_second()); |
| kbps_stats_.Push(rate_counter_->bits_per_second() / 1000.0); |
| } |
| |
| LossFilter::LossFilter(PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| random_(0x12345678), |
| loss_fraction_(0.0f) { |
| } |
| |
| void LossFilter::SetLoss(float loss_percent) { |
| BWE_TEST_LOGGING_ENABLE(false); |
| BWE_TEST_LOGGING_LOG1("Loss", "%f%%", loss_percent); |
| assert(loss_percent >= 0.0f); |
| assert(loss_percent <= 100.0f); |
| loss_fraction_ = loss_percent * 0.01f; |
| } |
| |
| void LossFilter::RunFor(int64_t /*time_ms*/, Packets* in_out) { |
| assert(in_out); |
| for (PacketsIt it = in_out->begin(); it != in_out->end(); ) { |
| if (random_.Rand() < loss_fraction_) { |
| delete *it; |
| it = in_out->erase(it); |
| } else { |
| ++it; |
| } |
| } |
| } |
| |
| DelayFilter::DelayFilter(PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| delay_us_(0), |
| last_send_time_us_(0) { |
| } |
| |
| void DelayFilter::SetDelay(int64_t delay_ms) { |
| BWE_TEST_LOGGING_ENABLE(false); |
| BWE_TEST_LOGGING_LOG1("Delay", "%d ms", static_cast<int>(delay_ms)); |
| assert(delay_ms >= 0); |
| delay_us_ = delay_ms * 1000; |
| } |
| |
| void DelayFilter::RunFor(int64_t /*time_ms*/, Packets* in_out) { |
| assert(in_out); |
| for (Packet* packet : *in_out) { |
| int64_t new_send_time_us = packet->send_time_us() + delay_us_; |
| last_send_time_us_ = std::max(last_send_time_us_, new_send_time_us); |
| packet->set_send_time_us(last_send_time_us_); |
| } |
| } |
| |
| JitterFilter::JitterFilter(PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| random_(0x89674523), |
| stddev_jitter_us_(0), |
| last_send_time_us_(0) { |
| } |
| |
| void JitterFilter::SetJitter(int64_t stddev_jitter_ms) { |
| BWE_TEST_LOGGING_ENABLE(false); |
| BWE_TEST_LOGGING_LOG1("Jitter", "%d ms", |
| static_cast<int>(stddev_jitter_ms)); |
| assert(stddev_jitter_ms >= 0); |
| stddev_jitter_us_ = stddev_jitter_ms * 1000; |
| } |
| |
| void JitterFilter::RunFor(int64_t /*time_ms*/, Packets* in_out) { |
| assert(in_out); |
| for (Packet* packet : *in_out) { |
| int64_t new_send_time_us = packet->send_time_us(); |
| new_send_time_us += random_.Gaussian(0, stddev_jitter_us_); |
| last_send_time_us_ = std::max(last_send_time_us_, new_send_time_us); |
| packet->set_send_time_us(last_send_time_us_); |
| } |
| } |
| |
| ReorderFilter::ReorderFilter(PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| random_(0x27452389), |
| reorder_fraction_(0.0f) { |
| } |
| |
| void ReorderFilter::SetReorder(float reorder_percent) { |
| BWE_TEST_LOGGING_ENABLE(false); |
| BWE_TEST_LOGGING_LOG1("Reordering", "%f%%", reorder_percent); |
| assert(reorder_percent >= 0.0f); |
| assert(reorder_percent <= 100.0f); |
| reorder_fraction_ = reorder_percent * 0.01f; |
| } |
| |
| void ReorderFilter::RunFor(int64_t /*time_ms*/, Packets* in_out) { |
| assert(in_out); |
| if (in_out->size() >= 2) { |
| PacketsIt last_it = in_out->begin(); |
| PacketsIt it = last_it; |
| while (++it != in_out->end()) { |
| if (random_.Rand() < reorder_fraction_) { |
| int64_t t1 = (*last_it)->send_time_us(); |
| int64_t t2 = (*it)->send_time_us(); |
| std::swap(*last_it, *it); |
| (*last_it)->set_send_time_us(t1); |
| (*it)->set_send_time_us(t2); |
| } |
| last_it = it; |
| } |
| } |
| } |
| |
| ChokeFilter::ChokeFilter(PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| kbps_(1200), |
| last_send_time_us_(0), |
| delay_cap_helper_(new DelayCapHelper()) { |
| } |
| |
| ChokeFilter::ChokeFilter(PacketProcessorListener* listener, |
| const FlowIds& flow_ids) |
| : PacketProcessor(listener, flow_ids, false), |
| kbps_(1200), |
| last_send_time_us_(0), |
| delay_cap_helper_(new DelayCapHelper()) { |
| } |
| |
| ChokeFilter::~ChokeFilter() {} |
| |
| void ChokeFilter::SetCapacity(uint32_t kbps) { |
| BWE_TEST_LOGGING_ENABLE(false); |
| BWE_TEST_LOGGING_LOG1("BitrateChoke", "%d kbps", kbps); |
| kbps_ = kbps; |
| } |
| |
| void ChokeFilter::RunFor(int64_t /*time_ms*/, Packets* in_out) { |
| assert(in_out); |
| for (PacketsIt it = in_out->begin(); it != in_out->end(); ) { |
| int64_t earliest_send_time_us = |
| last_send_time_us_ + |
| ((*it)->payload_size() * 8 * 1000 + kbps_ / 2) / kbps_; |
| int64_t new_send_time_us = |
| std::max((*it)->send_time_us(), earliest_send_time_us); |
| if (delay_cap_helper_->ShouldSendPacket(new_send_time_us, |
| (*it)->send_time_us())) { |
| (*it)->set_send_time_us(new_send_time_us); |
| last_send_time_us_ = new_send_time_us; |
| ++it; |
| } else { |
| delete *it; |
| it = in_out->erase(it); |
| } |
| } |
| } |
| |
| void ChokeFilter::SetMaxDelay(int max_delay_ms) { |
| delay_cap_helper_->SetMaxDelay(max_delay_ms); |
| } |
| |
| Stats<double> ChokeFilter::GetDelayStats() const { |
| return delay_cap_helper_->delay_stats(); |
| } |
| |
| TraceBasedDeliveryFilter::TraceBasedDeliveryFilter( |
| PacketProcessorListener* listener) |
| : PacketProcessor(listener, false), |
| current_offset_us_(0), |
| delivery_times_us_(), |
| next_delivery_it_(), |
| local_time_us_(-1), |
| rate_counter_(new RateCounter), |
| name_(""), |
| delay_cap_helper_(new DelayCapHelper()), |
| packets_per_second_stats_(), |
| kbps_stats_() {} |
| |
| TraceBasedDeliveryFilter::TraceBasedDeliveryFilter( |
| PacketProcessorListener* listener, |
| const std::string& name) |
| : PacketProcessor(listener, false), |
| current_offset_us_(0), |
| delivery_times_us_(), |
| next_delivery_it_(), |
| local_time_us_(-1), |
| rate_counter_(new RateCounter), |
| name_(name), |
| delay_cap_helper_(new DelayCapHelper()), |
| packets_per_second_stats_(), |
| kbps_stats_() {} |
| |
| TraceBasedDeliveryFilter::~TraceBasedDeliveryFilter() { |
| } |
| |
| bool TraceBasedDeliveryFilter::Init(const std::string& filename) { |
| FILE* trace_file = fopen(filename.c_str(), "r"); |
| if (!trace_file) { |
| return false; |
| } |
| int64_t first_timestamp = -1; |
| while(!feof(trace_file)) { |
| const size_t kMaxLineLength = 100; |
| char line[kMaxLineLength]; |
| if (fgets(line, kMaxLineLength, trace_file)) { |
| std::string line_string(line); |
| std::istringstream buffer(line_string); |
| int64_t timestamp; |
| buffer >> timestamp; |
| timestamp /= 1000; // Convert to microseconds. |
| if (first_timestamp == -1) |
| first_timestamp = timestamp; |
| assert(delivery_times_us_.empty() || |
| timestamp - first_timestamp - delivery_times_us_.back() >= 0); |
| delivery_times_us_.push_back(timestamp - first_timestamp); |
| } |
| } |
| assert(!delivery_times_us_.empty()); |
| next_delivery_it_ = delivery_times_us_.begin(); |
| fclose(trace_file); |
| return true; |
| } |
| |
| void TraceBasedDeliveryFilter::Plot(int64_t timestamp_ms) { |
| BWE_TEST_LOGGING_CONTEXT(name_.c_str()); |
| // This plots the max possible throughput of the trace-based delivery filter, |
| // which will be reached if a packet sent on every packet slot of the trace. |
| BWE_TEST_LOGGING_PLOT("MaxThroughput_#1", timestamp_ms, |
| rate_counter_->bits_per_second() / 1000.0); |
| } |
| |
| void TraceBasedDeliveryFilter::RunFor(int64_t time_ms, Packets* in_out) { |
| assert(in_out); |
| for (PacketsIt it = in_out->begin(); it != in_out->end();) { |
| while (local_time_us_ < (*it)->send_time_us()) { |
| ProceedToNextSlot(); |
| } |
| // Drop any packets that have been queued for too long. |
| while (!delay_cap_helper_->ShouldSendPacket(local_time_us_, |
| (*it)->send_time_us())) { |
| delete *it; |
| it = in_out->erase(it); |
| if (it == in_out->end()) { |
| return; |
| } |
| } |
| if (local_time_us_ >= (*it)->send_time_us()) { |
| (*it)->set_send_time_us(local_time_us_); |
| ProceedToNextSlot(); |
| } |
| ++it; |
| } |
| packets_per_second_stats_.Push(rate_counter_->packets_per_second()); |
| kbps_stats_.Push(rate_counter_->bits_per_second() / 1000.0); |
| } |
| |
| void TraceBasedDeliveryFilter::SetMaxDelay(int max_delay_ms) { |
| delay_cap_helper_->SetMaxDelay(max_delay_ms); |
| } |
| |
| Stats<double> TraceBasedDeliveryFilter::GetDelayStats() const { |
| return delay_cap_helper_->delay_stats(); |
| } |
| |
| Stats<double> TraceBasedDeliveryFilter::GetBitrateStats() const { |
| return kbps_stats_; |
| } |
| |
| void TraceBasedDeliveryFilter::ProceedToNextSlot() { |
| if (*next_delivery_it_ <= local_time_us_) { |
| ++next_delivery_it_; |
| if (next_delivery_it_ == delivery_times_us_.end()) { |
| // When the trace wraps we allow two packets to be sent back-to-back. |
| for (int64_t& delivery_time_us : delivery_times_us_) { |
| delivery_time_us += local_time_us_ - current_offset_us_; |
| } |
| current_offset_us_ += local_time_us_ - current_offset_us_; |
| next_delivery_it_ = delivery_times_us_.begin(); |
| } |
| } |
| local_time_us_ = *next_delivery_it_; |
| const int kPayloadSize = 1200; |
| rate_counter_->UpdateRates(local_time_us_, kPayloadSize); |
| } |
| |
| VideoSource::VideoSource(int flow_id, |
| float fps, |
| uint32_t kbps, |
| uint32_t ssrc, |
| int64_t first_frame_offset_ms) |
| : kMaxPayloadSizeBytes(1200), |
| kTimestampBase(0xff80ff00ul), |
| flow_id_(flow_id), |
| frame_period_ms_(1000.0 / fps), |
| bytes_per_second_((1000 * kbps) / 8), |
| frame_size_bytes_(bytes_per_second_ / fps), |
| next_frame_ms_(first_frame_offset_ms), |
| now_ms_(0.0), |
| prototype_header_() { |
| memset(&prototype_header_, 0, sizeof(prototype_header_)); |
| prototype_header_.ssrc = ssrc; |
| prototype_header_.sequenceNumber = 0xf000u; |
| } |
| |
| uint32_t VideoSource::NextFrameSize() { |
| return frame_size_bytes_; |
| } |
| |
| uint32_t VideoSource::NextPacketSize(uint32_t frame_size, |
| uint32_t remaining_payload) { |
| return std::min(kMaxPayloadSizeBytes, remaining_payload); |
| } |
| |
| void VideoSource::RunFor(int64_t time_ms, Packets* in_out) { |
| assert(in_out); |
| now_ms_ += time_ms; |
| Packets new_packets; |
| while (now_ms_ >= next_frame_ms_) { |
| prototype_header_.timestamp = kTimestampBase + |
| static_cast<uint32_t>(next_frame_ms_ * 90.0); |
| prototype_header_.extension.transmissionTimeOffset = 0; |
| |
| // Generate new packets for this frame, all with the same timestamp, |
| // but the payload size is capped, so if the whole frame doesn't fit in |
| // one packet, we will see a number of equally sized packets followed by |
| // one smaller at the tail. |
| int64_t send_time_us = next_frame_ms_ * 1000.0; |
| uint32_t frame_size = NextFrameSize(); |
| uint32_t payload_size = frame_size; |
| |
| while (payload_size > 0) { |
| ++prototype_header_.sequenceNumber; |
| uint32_t size = NextPacketSize(frame_size, payload_size); |
| MediaPacket* new_packet = |
| new MediaPacket(flow_id_, send_time_us, size, prototype_header_); |
| new_packets.push_back(new_packet); |
| new_packet->SetAbsSendTimeMs(next_frame_ms_); |
| payload_size -= size; |
| } |
| |
| next_frame_ms_ += frame_period_ms_; |
| } |
| in_out->merge(new_packets, DereferencingComparator<Packet>); |
| } |
| |
| AdaptiveVideoSource::AdaptiveVideoSource(int flow_id, |
| float fps, |
| uint32_t kbps, |
| uint32_t ssrc, |
| int64_t first_frame_offset_ms) |
| : VideoSource(flow_id, fps, kbps, ssrc, first_frame_offset_ms) { |
| } |
| |
| void AdaptiveVideoSource::SetBitrateBps(int bitrate_bps) { |
| bytes_per_second_ = std::min(bitrate_bps / 8, 2500000 / 8); |
| frame_size_bytes_ = (bytes_per_second_ * frame_period_ms_ + 500) / 1000; |
| } |
| |
| PeriodicKeyFrameSource::PeriodicKeyFrameSource(int flow_id, |
| float fps, |
| uint32_t kbps, |
| uint32_t ssrc, |
| int64_t first_frame_offset_ms, |
| int key_frame_interval) |
| : AdaptiveVideoSource(flow_id, fps, kbps, ssrc, first_frame_offset_ms), |
| key_frame_interval_(key_frame_interval), |
| frame_counter_(0), |
| compensation_bytes_(0), |
| compensation_per_frame_(0) { |
| } |
| |
| uint32_t PeriodicKeyFrameSource::NextFrameSize() { |
| uint32_t payload_size = frame_size_bytes_; |
| if (frame_counter_ == 0) { |
| payload_size = kMaxPayloadSizeBytes * 12; |
| compensation_bytes_ = 4 * frame_size_bytes_; |
| compensation_per_frame_ = compensation_bytes_ / 30; |
| } else if (key_frame_interval_ > 0 && |
| (frame_counter_ % key_frame_interval_ == 0)) { |
| payload_size *= 5; |
| compensation_bytes_ = payload_size - frame_size_bytes_; |
| compensation_per_frame_ = compensation_bytes_ / 30; |
| } else if (compensation_bytes_ > 0) { |
| if (compensation_per_frame_ > static_cast<int>(payload_size)) { |
| // Skip this frame. |
| compensation_bytes_ -= payload_size; |
| payload_size = 0; |
| } else { |
| payload_size -= compensation_per_frame_; |
| compensation_bytes_ -= compensation_per_frame_; |
| } |
| } |
| if (compensation_bytes_ < 0) |
| compensation_bytes_ = 0; |
| ++frame_counter_; |
| return payload_size; |
| } |
| |
| uint32_t PeriodicKeyFrameSource::NextPacketSize(uint32_t frame_size, |
| uint32_t remaining_payload) { |
| uint32_t fragments = |
| (frame_size + (kMaxPayloadSizeBytes - 1)) / kMaxPayloadSizeBytes; |
| uint32_t avg_size = (frame_size + fragments - 1) / fragments; |
| return std::min(avg_size, remaining_payload); |
| } |
| |
| RembSendSideBwe::RembSendSideBwe(int kbps, |
| BitrateObserver* observer, |
| Clock* clock) |
| : bitrate_controller_( |
| BitrateController::CreateBitrateController(clock, false)), |
| feedback_observer_(bitrate_controller_->CreateRtcpBandwidthObserver()), |
| clock_(clock) { |
| assert(kbps >= kMinBitrateKbps); |
| assert(kbps <= kMaxBitrateKbps); |
| bitrate_controller_->SetBitrateObserver( |
| observer, 1000 * kbps, 1000 * kMinBitrateKbps, 1000 * kMaxBitrateKbps); |
| } |
| |
| RembSendSideBwe::~RembSendSideBwe() { |
| } |
| |
| void RembSendSideBwe::GiveFeedback(const FeedbackPacket& feedback) { |
| const RembFeedback& remb_feedback = |
| static_cast<const RembFeedback&>(feedback); |
| feedback_observer_->OnReceivedEstimatedBitrate(remb_feedback.estimated_bps()); |
| ReportBlockList report_blocks; |
| report_blocks.push_back(remb_feedback.report_block()); |
| feedback_observer_->OnReceivedRtcpReceiverReport( |
| report_blocks, 0, clock_->TimeInMilliseconds()); |
| bitrate_controller_->Process(); |
| } |
| |
| int64_t RembSendSideBwe::TimeUntilNextProcess() { |
| return bitrate_controller_->TimeUntilNextProcess(); |
| } |
| |
| int RembSendSideBwe::Process() { |
| return bitrate_controller_->Process(); |
| } |
| |
| FullSendSideBwe::FullSendSideBwe(int kbps, |
| BitrateObserver* observer, |
| Clock* clock) |
| : bitrate_controller_( |
| BitrateController::CreateBitrateController(clock, false)), |
| rbe_(AbsoluteSendTimeRemoteBitrateEstimatorFactory() |
| .Create(this, clock, kAimdControl, 1000 * kMinBitrateKbps)), |
| feedback_observer_(bitrate_controller_->CreateRtcpBandwidthObserver()), |
| clock_(clock) { |
| assert(kbps >= kMinBitrateKbps); |
| assert(kbps <= kMaxBitrateKbps); |
| bitrate_controller_->SetBitrateObserver( |
| observer, 1000 * kbps, 1000 * kMinBitrateKbps, 1000 * kMaxBitrateKbps); |
| } |
| |
| FullSendSideBwe::~FullSendSideBwe() { |
| } |
| |
| void FullSendSideBwe::GiveFeedback(const FeedbackPacket& feedback) { |
| const SendSideBweFeedback& fb = |
| static_cast<const SendSideBweFeedback&>(feedback); |
| if (fb.packet_feedback_vector().empty()) |
| return; |
| rbe_->IncomingPacketFeedbackVector(fb.packet_feedback_vector()); |
| if (rbe_->TimeUntilNextProcess() <= 0) |
| rbe_->Process(); |
| // TODO(holmer): Handle losses in between feedback packets. |
| int expected_packets = fb.packet_feedback_vector().back().sequence_number - |
| fb.packet_feedback_vector().front().sequence_number + |
| 1; |
| int lost_packets = expected_packets - fb.packet_feedback_vector().size(); |
| report_block_.fractionLost = (lost_packets << 8) / expected_packets; |
| report_block_.cumulativeLost += lost_packets; |
| ReportBlockList report_blocks; |
| report_blocks.push_back(report_block_); |
| feedback_observer_->OnReceivedRtcpReceiverReport( |
| report_blocks, 0, clock_->TimeInMilliseconds()); |
| bitrate_controller_->Process(); |
| } |
| |
| void FullSendSideBwe::OnReceiveBitrateChanged( |
| const std::vector<unsigned int>& ssrcs, |
| unsigned int bitrate) { |
| feedback_observer_->OnReceivedEstimatedBitrate(bitrate); |
| } |
| |
| int64_t FullSendSideBwe::TimeUntilNextProcess() { |
| return bitrate_controller_->TimeUntilNextProcess(); |
| } |
| |
| int FullSendSideBwe::Process() { |
| rbe_->Process(); |
| return bitrate_controller_->Process(); |
| } |
| |
| SendSideBwe* CreateEstimator(BandwidthEstimatorType estimator, |
| int kbps, |
| BitrateObserver* observer, |
| Clock* clock) { |
| switch (estimator) { |
| case kRembEstimator: |
| return new RembSendSideBwe(kbps, observer, clock); |
| case kFullSendSideEstimator: |
| return new FullSendSideBwe(kbps, observer, clock); |
| case kNullEstimator: |
| return new NullSendSideBwe(); |
| } |
| assert(false); |
| return NULL; |
| } |
| |
| PacketSender::PacketSender(PacketProcessorListener* listener, |
| VideoSource* source, |
| BandwidthEstimatorType estimator) |
| : PacketProcessor(listener, source->flow_id(), true), |
| // For Packet::send_time_us() to be comparable with timestamps from |
| // clock_, the clock of the PacketSender and the Source must be aligned. |
| // We assume that both start at time 0. |
| clock_(0), |
| source_(source), |
| bwe_(CreateEstimator(estimator, |
| 8 * source_->bytes_per_second() / 1000, |
| this, |
| &clock_)) { |
| modules_.push_back(bwe_.get()); |
| } |
| |
| PacketSender::~PacketSender() { |
| } |
| |
| void PacketSender::RunFor(int64_t time_ms, Packets* in_out) { |
| start_of_run_ms_ = clock_.TimeInMilliseconds(); |
| while (time_ms > 0) { |
| int64_t time_to_run_ms = std::min(time_ms, static_cast<int64_t>(100)); |
| source_->RunFor(time_to_run_ms, in_out); |
| clock_.AdvanceTimeMilliseconds(time_to_run_ms); |
| bwe_->Process(); |
| time_ms -= time_to_run_ms; |
| } |
| } |
| |
| int PacketSender::GetFeedbackIntervalMs() const { |
| return bwe_->GetFeedbackIntervalMs(); |
| } |
| |
| void PacketSender::GiveFeedback(const FeedbackPacket& feedback) { |
| bwe_->GiveFeedback(feedback); |
| } |
| |
| void PacketSender::OnNetworkChanged(uint32_t target_bitrate_bps, |
| uint8_t fraction_lost, |
| int64_t rtt) { |
| source_->SetBitrateBps(target_bitrate_bps); |
| std::stringstream ss; |
| ss << "SendEstimate_" << source_->flow_id() << "#1"; |
| BWE_TEST_LOGGING_PLOT(ss.str(), clock_.TimeInMilliseconds(), |
| target_bitrate_bps / 1000); |
| } |
| |
| PacedVideoSender::PacedVideoSender(PacketProcessorListener* listener, |
| VideoSource* source, |
| BandwidthEstimatorType estimator) |
| : PacketSender(listener, source, estimator), |
| pacer_(&clock_, |
| this, |
| 8 * source->bytes_per_second() / 1000, |
| PacedSender::kDefaultPaceMultiplier * 8 * |
| source->bytes_per_second() / |
| 1000, |
| 0) { |
| modules_.push_back(&pacer_); |
| } |
| |
| PacedVideoSender::~PacedVideoSender() { |
| for (Packet* packet : pacer_queue_) |
| delete packet; |
| for (Packet* packet : queue_) |
| delete packet; |
| } |
| |
| void PacedVideoSender::RunFor(int64_t time_ms, Packets* in_out) { |
| start_of_run_ms_ = clock_.TimeInMilliseconds(); |
| Packets generated_packets; |
| source_->RunFor(time_ms, &generated_packets); |
| // Run process periodically to allow the packets to be paced out. |
| int64_t end_time_ms = clock_.TimeInMilliseconds() + time_ms; |
| Packets::iterator it = generated_packets.begin(); |
| while (clock_.TimeInMilliseconds() <= end_time_ms) { |
| int64_t time_until_process_ms = TimeUntilNextProcess(modules_); |
| |
| int time_until_packet_ms = time_ms; |
| if (it != generated_packets.end()) |
| time_until_packet_ms = |
| ((*it)->send_time_us() + 500) / 1000 - clock_.TimeInMilliseconds(); |
| assert(time_until_packet_ms >= 0); |
| |
| int time_until_next_event_ms = time_until_packet_ms; |
| if (time_until_process_ms < time_until_packet_ms) { |
| time_until_next_event_ms = time_until_process_ms; |
| } |
| |
| if (clock_.TimeInMilliseconds() + time_until_next_event_ms > end_time_ms) { |
| clock_.AdvanceTimeMilliseconds(end_time_ms - clock_.TimeInMilliseconds()); |
| break; |
| } |
| clock_.AdvanceTimeMilliseconds(time_until_next_event_ms); |
| if (time_until_process_ms < time_until_packet_ms) { |
| // Time to process. |
| CallProcess(modules_); |
| } else { |
| // Time to send next packet to pacer. |
| MediaPacket* media_packet = static_cast<MediaPacket*>(*it); |
| pacer_.SendPacket(PacedSender::kNormalPriority, |
| media_packet->header().ssrc, |
| media_packet->header().sequenceNumber, |
| (media_packet->send_time_us() + 500) / 1000, |
| media_packet->payload_size(), false); |
| pacer_queue_.push_back(media_packet); |
| assert(pacer_queue_.size() < 10000); |
| ++it; |
| } |
| } |
| QueuePackets(in_out, end_time_ms * 1000); |
| } |
| |
| int64_t PacedVideoSender::TimeUntilNextProcess( |
| const std::list<Module*>& modules) { |
| int64_t time_until_next_process_ms = 10; |
| for (Module* module : modules) { |
| int64_t next_process_ms = module->TimeUntilNextProcess(); |
| if (next_process_ms < time_until_next_process_ms) |
| time_until_next_process_ms = next_process_ms; |
| } |
| if (time_until_next_process_ms < 0) |
| time_until_next_process_ms = 0; |
| return time_until_next_process_ms; |
| } |
| |
| void PacedVideoSender::CallProcess(const std::list<Module*>& modules) { |
| for (Module* module : modules) { |
| if (module->TimeUntilNextProcess() <= 0) { |
| module->Process(); |
| } |
| } |
| } |
| |
| void PacedVideoSender::QueuePackets(Packets* batch, |
| int64_t end_of_batch_time_us) { |
| queue_.merge(*batch, DereferencingComparator<Packet>); |
| if (queue_.empty()) { |
| return; |
| } |
| Packets::iterator it = queue_.begin(); |
| for (; it != queue_.end(); ++it) { |
| if ((*it)->send_time_us() > end_of_batch_time_us) { |
| break; |
| } |
| } |
| Packets to_transfer; |
| to_transfer.splice(to_transfer.begin(), queue_, queue_.begin(), it); |
| batch->merge(to_transfer, DereferencingComparator<Packet>); |
| } |
| |
| bool PacedVideoSender::TimeToSendPacket(uint32_t ssrc, |
| uint16_t sequence_number, |
| int64_t capture_time_ms, |
| bool retransmission) { |
| for (Packets::iterator it = pacer_queue_.begin(); it != pacer_queue_.end(); |
| ++it) { |
| MediaPacket* media_packet = static_cast<MediaPacket*>(*it); |
| if (media_packet->header().sequenceNumber == sequence_number) { |
| int64_t pace_out_time_ms = clock_.TimeInMilliseconds(); |
| // Make sure a packet is never paced out earlier than when it was put into |
| // the pacer. |
| assert(pace_out_time_ms >= (media_packet->send_time_us() + 500) / 1000); |
| media_packet->SetAbsSendTimeMs(pace_out_time_ms); |
| media_packet->set_send_time_us(1000 * pace_out_time_ms); |
| queue_.push_back(media_packet); |
| pacer_queue_.erase(it); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| size_t PacedVideoSender::TimeToSendPadding(size_t bytes) { |
| return 0; |
| } |
| |
| void PacedVideoSender::OnNetworkChanged(uint32_t target_bitrate_bps, |
| uint8_t fraction_lost, |
| int64_t rtt) { |
| PacketSender::OnNetworkChanged(target_bitrate_bps, fraction_lost, rtt); |
| pacer_.UpdateBitrate( |
| target_bitrate_bps / 1000, |
| PacedSender::kDefaultPaceMultiplier * target_bitrate_bps / 1000, 0); |
| } |
| } // namespace bwe |
| } // namespace testing |
| } // namespace webrtc |