blob: 7c295aa0e307cae0f82d0f13bb5c9808800832bf [file] [log] [blame]
/*
* Copyright (c) 2015 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/logging/rtc_event_log/rtc_event_log.h"
#include <atomic>
#include <deque>
#include <functional>
#include <limits>
#include <memory>
#include <utility>
#include <vector>
#include "webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h"
#include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/app.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/bye.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/common_header.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_jitter_report.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/psfb.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sdes.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.h"
#include "webrtc/rtc_base/checks.h"
#include "webrtc/rtc_base/constructormagic.h"
#include "webrtc/rtc_base/event.h"
#include "webrtc/rtc_base/ignore_wundef.h"
#include "webrtc/rtc_base/logging.h"
#include "webrtc/rtc_base/protobuf_utils.h"
#include "webrtc/rtc_base/ptr_util.h"
#include "webrtc/rtc_base/sequenced_task_checker.h"
#include "webrtc/rtc_base/task_queue.h"
#include "webrtc/rtc_base/thread_annotations.h"
#include "webrtc/rtc_base/timeutils.h"
#include "webrtc/system_wrappers/include/file_wrapper.h"
#include "webrtc/typedefs.h"
#ifdef ENABLE_RTC_EVENT_LOG
// *.pb.h files are generated at build-time by the protobuf compiler.
RTC_PUSH_IGNORING_WUNDEF()
#ifdef WEBRTC_ANDROID_PLATFORM_BUILD
#include "external/webrtc/webrtc/logging/rtc_event_log/rtc_event_log.pb.h"
#else
#include "webrtc/logging/rtc_event_log/rtc_event_log.pb.h"
#endif
RTC_POP_IGNORING_WUNDEF()
#endif
namespace webrtc {
#ifdef ENABLE_RTC_EVENT_LOG
namespace {
const int kEventsInHistory = 10000;
bool IsConfigEvent(const rtclog::Event& event) {
rtclog::Event_EventType event_type = event.type();
return event_type == rtclog::Event::VIDEO_RECEIVER_CONFIG_EVENT ||
event_type == rtclog::Event::VIDEO_SENDER_CONFIG_EVENT ||
event_type == rtclog::Event::AUDIO_RECEIVER_CONFIG_EVENT ||
event_type == rtclog::Event::AUDIO_SENDER_CONFIG_EVENT;
}
// TODO(eladalon): This class exists because C++11 doesn't allow transferring a
// unique_ptr to a lambda (a copy constructor is required). We should get
// rid of this when we move to C++14.
template <typename T>
class ResourceOwningTask final : public rtc::QueuedTask {
public:
ResourceOwningTask(std::unique_ptr<T> resource,
std::function<void(std::unique_ptr<T>)> handler)
: resource_(std::move(resource)), handler_(handler) {}
bool Run() override {
handler_(std::move(resource_));
return true;
}
private:
std::unique_ptr<T> resource_;
std::function<void(std::unique_ptr<T>)> handler_;
};
} // namespace
class RtcEventLogImpl final : public RtcEventLog {
friend std::unique_ptr<RtcEventLog> RtcEventLog::Create();
public:
~RtcEventLogImpl() override;
bool StartLogging(const std::string& file_name,
int64_t max_size_bytes) override;
bool StartLogging(rtc::PlatformFile platform_file,
int64_t max_size_bytes) override;
void StopLogging() override;
void LogVideoReceiveStreamConfig(const rtclog::StreamConfig& config) override;
void LogVideoSendStreamConfig(const rtclog::StreamConfig& config) override;
void LogAudioReceiveStreamConfig(const rtclog::StreamConfig& config) override;
void LogAudioSendStreamConfig(const rtclog::StreamConfig& config) override;
void LogRtpHeader(PacketDirection direction,
const uint8_t* header,
size_t packet_length) override;
void LogRtpHeader(PacketDirection direction,
const uint8_t* header,
size_t packet_length,
int probe_cluster_id) override;
void LogRtcpPacket(PacketDirection direction,
const uint8_t* packet,
size_t length) override;
void LogAudioPlayout(uint32_t ssrc) override;
void LogLossBasedBweUpdate(int32_t bitrate_bps,
uint8_t fraction_loss,
int32_t total_packets) override;
void LogDelayBasedBweUpdate(int32_t bitrate_bps,
BandwidthUsage detector_state) override;
void LogAudioNetworkAdaptation(
const AudioEncoderRuntimeConfig& config) override;
void LogProbeClusterCreated(int id,
int bitrate_bps,
int min_probes,
int min_bytes) override;
void LogProbeResultSuccess(int id, int bitrate_bps) override;
void LogProbeResultFailure(int id,
ProbeFailureReason failure_reason) override;
private:
void StartLoggingInternal(std::unique_ptr<FileWrapper> file,
int64_t max_size_bytes);
RtcEventLogImpl(); // Creation is done by RtcEventLog::Create.
void StoreEvent(std::unique_ptr<rtclog::Event> event);
void LogProbeResult(int id,
rtclog::BweProbeResult::ResultType result,
int bitrate_bps);
// Appends an event to the output protobuf string, returning true on success.
// Fails and returns false in case the limit on output size prevents the
// event from being added; in this case, the output string is left unchanged.
bool AppendEventToString(rtclog::Event* event,
ProtoString* output_string) RTC_WARN_UNUSED_RESULT;
void LogToMemory(std::unique_ptr<rtclog::Event> event);
void StartLogFile();
void LogToFile(std::unique_ptr<rtclog::Event> event);
void StopLogFile(int64_t stop_time);
// Observe a limit on the number of concurrent logs, so as not to run into
// OS-imposed limits on open files and/or threads/task-queues.
// TODO(eladalon): Known issue - there's a race over |log_count_|.
static std::atomic<int> log_count_;
// Make sure that the event log is "managed" - created/destroyed, as well
// as started/stopped - from the same thread/task-queue.
rtc::SequencedTaskChecker owner_sequence_checker_;
// History containing all past configuration events.
std::vector<std::unique_ptr<rtclog::Event>> config_history_
RTC_ACCESS_ON(task_queue_);
// History containing the most recent (non-configuration) events (~10s).
std::deque<std::unique_ptr<rtclog::Event>> history_
RTC_ACCESS_ON(task_queue_);
std::unique_ptr<FileWrapper> file_ RTC_ACCESS_ON(task_queue_);
size_t max_size_bytes_ RTC_ACCESS_ON(task_queue_);
size_t written_bytes_ RTC_ACCESS_ON(task_queue_);
// Keep this last to ensure it destructs first, or else tasks living on the
// queue might access other members after they've been torn down.
rtc::TaskQueue task_queue_;
RTC_DISALLOW_COPY_AND_ASSIGN(RtcEventLogImpl);
};
namespace {
// The functions in this namespace convert enums from the runtime format
// that the rest of the WebRtc project can use, to the corresponding
// serialized enum which is defined by the protobuf.
rtclog::VideoReceiveConfig_RtcpMode ConvertRtcpMode(RtcpMode rtcp_mode) {
switch (rtcp_mode) {
case RtcpMode::kCompound:
return rtclog::VideoReceiveConfig::RTCP_COMPOUND;
case RtcpMode::kReducedSize:
return rtclog::VideoReceiveConfig::RTCP_REDUCEDSIZE;
case RtcpMode::kOff:
RTC_NOTREACHED();
return rtclog::VideoReceiveConfig::RTCP_COMPOUND;
}
RTC_NOTREACHED();
return rtclog::VideoReceiveConfig::RTCP_COMPOUND;
}
rtclog::DelayBasedBweUpdate::DetectorState ConvertDetectorState(
BandwidthUsage state) {
switch (state) {
case BandwidthUsage::kBwNormal:
return rtclog::DelayBasedBweUpdate::BWE_NORMAL;
case BandwidthUsage::kBwUnderusing:
return rtclog::DelayBasedBweUpdate::BWE_UNDERUSING;
case BandwidthUsage::kBwOverusing:
return rtclog::DelayBasedBweUpdate::BWE_OVERUSING;
}
RTC_NOTREACHED();
return rtclog::DelayBasedBweUpdate::BWE_NORMAL;
}
rtclog::BweProbeResult::ResultType ConvertProbeResultType(
ProbeFailureReason failure_reason) {
switch (failure_reason) {
case kInvalidSendReceiveInterval:
return rtclog::BweProbeResult::INVALID_SEND_RECEIVE_INTERVAL;
case kInvalidSendReceiveRatio:
return rtclog::BweProbeResult::INVALID_SEND_RECEIVE_RATIO;
case kTimeout:
return rtclog::BweProbeResult::TIMEOUT;
}
RTC_NOTREACHED();
return rtclog::BweProbeResult::SUCCESS;
}
} // namespace
std::atomic<int> RtcEventLogImpl::log_count_(0);
RtcEventLogImpl::RtcEventLogImpl()
: file_(FileWrapper::Create()),
max_size_bytes_(std::numeric_limits<decltype(max_size_bytes_)>::max()),
written_bytes_(0),
task_queue_("rtc_event_log") {}
RtcEventLogImpl::~RtcEventLogImpl() {
RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
// If we're logging to the file, this will stop that. Blocking function.
StopLogging();
int count = std::atomic_fetch_sub(&RtcEventLogImpl::log_count_, 1) - 1;
RTC_DCHECK_GE(count, 0);
}
bool RtcEventLogImpl::StartLogging(const std::string& file_name,
int64_t max_size_bytes) {
RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
auto file = rtc::WrapUnique<FileWrapper>(FileWrapper::Create());
if (!file->OpenFile(file_name.c_str(), false)) {
LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
return false;
}
StartLoggingInternal(std::move(file), max_size_bytes);
return true;
}
bool RtcEventLogImpl::StartLogging(rtc::PlatformFile platform_file,
int64_t max_size_bytes) {
RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
auto file = rtc::WrapUnique<FileWrapper>(FileWrapper::Create());
FILE* file_handle = rtc::FdopenPlatformFileForWriting(platform_file);
if (!file_handle) {
LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
// Even though we failed to open a FILE*, the platform_file is still open
// and needs to be closed.
if (!rtc::ClosePlatformFile(platform_file)) {
LOG(LS_ERROR) << "Can't close file.";
}
return false;
}
if (!file->OpenFromFileHandle(file_handle)) {
LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
return false;
}
StartLoggingInternal(std::move(file), max_size_bytes);
return true;
}
void RtcEventLogImpl::StopLogging() {
RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
LOG(LS_INFO) << "Stopping WebRTC event log.";
const int64_t stop_time = rtc::TimeMicros();
rtc::Event file_finished(true, false);
task_queue_.PostTask([this, stop_time, &file_finished]() {
RTC_DCHECK_RUN_ON(&task_queue_);
if (file_->is_open()) {
StopLogFile(stop_time);
}
file_finished.Set();
});
file_finished.Wait(rtc::Event::kForever);
LOG(LS_INFO) << "WebRTC event log successfully stopped.";
}
void RtcEventLogImpl::LogVideoReceiveStreamConfig(
const rtclog::StreamConfig& config) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::VIDEO_RECEIVER_CONFIG_EVENT);
rtclog::VideoReceiveConfig* receiver_config =
event->mutable_video_receiver_config();
receiver_config->set_remote_ssrc(config.remote_ssrc);
receiver_config->set_local_ssrc(config.local_ssrc);
// TODO(perkj): Add field for rsid.
receiver_config->set_rtcp_mode(ConvertRtcpMode(config.rtcp_mode));
receiver_config->set_remb(config.remb);
for (const auto& e : config.rtp_extensions) {
rtclog::RtpHeaderExtension* extension =
receiver_config->add_header_extensions();
extension->set_name(e.uri);
extension->set_id(e.id);
}
for (const auto& d : config.codecs) {
rtclog::DecoderConfig* decoder = receiver_config->add_decoders();
decoder->set_name(d.payload_name);
decoder->set_payload_type(d.payload_type);
if (d.rtx_payload_type != 0) {
rtclog::RtxMap* rtx = receiver_config->add_rtx_map();
rtx->set_payload_type(d.payload_type);
rtx->mutable_config()->set_rtx_ssrc(config.rtx_ssrc);
rtx->mutable_config()->set_rtx_payload_type(d.rtx_payload_type);
}
}
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogVideoSendStreamConfig(
const rtclog::StreamConfig& config) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::VIDEO_SENDER_CONFIG_EVENT);
rtclog::VideoSendConfig* sender_config = event->mutable_video_sender_config();
// TODO(perkj): rtclog::VideoSendConfig should only contain one SSRC.
sender_config->add_ssrcs(config.local_ssrc);
if (config.rtx_ssrc != 0) {
sender_config->add_rtx_ssrcs(config.rtx_ssrc);
}
for (const auto& e : config.rtp_extensions) {
rtclog::RtpHeaderExtension* extension =
sender_config->add_header_extensions();
extension->set_name(e.uri);
extension->set_id(e.id);
}
// TODO(perkj): rtclog::VideoSendConfig should contain many possible codec
// configurations.
for (const auto& codec : config.codecs) {
sender_config->set_rtx_payload_type(codec.rtx_payload_type);
rtclog::EncoderConfig* encoder = sender_config->mutable_encoder();
encoder->set_name(codec.payload_name);
encoder->set_payload_type(codec.payload_type);
if (config.codecs.size() > 1) {
LOG(WARNING) << "LogVideoSendStreamConfig currently only supports one "
<< "codec. Logging codec :" << codec.payload_name;
break;
}
}
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogAudioReceiveStreamConfig(
const rtclog::StreamConfig& config) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::AUDIO_RECEIVER_CONFIG_EVENT);
rtclog::AudioReceiveConfig* receiver_config =
event->mutable_audio_receiver_config();
receiver_config->set_remote_ssrc(config.remote_ssrc);
receiver_config->set_local_ssrc(config.local_ssrc);
for (const auto& e : config.rtp_extensions) {
rtclog::RtpHeaderExtension* extension =
receiver_config->add_header_extensions();
extension->set_name(e.uri);
extension->set_id(e.id);
}
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogAudioSendStreamConfig(
const rtclog::StreamConfig& config) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::AUDIO_SENDER_CONFIG_EVENT);
rtclog::AudioSendConfig* sender_config = event->mutable_audio_sender_config();
sender_config->set_ssrc(config.local_ssrc);
for (const auto& e : config.rtp_extensions) {
rtclog::RtpHeaderExtension* extension =
sender_config->add_header_extensions();
extension->set_name(e.uri);
extension->set_id(e.id);
}
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogRtpHeader(PacketDirection direction,
const uint8_t* header,
size_t packet_length) {
LogRtpHeader(direction, header, packet_length, PacedPacketInfo::kNotAProbe);
}
void RtcEventLogImpl::LogRtpHeader(PacketDirection direction,
const uint8_t* header,
size_t packet_length,
int probe_cluster_id) {
// Read header length (in bytes) from packet data.
if (packet_length < 12u) {
return; // Don't read outside the packet.
}
const bool x = (header[0] & 0x10) != 0;
const uint8_t cc = header[0] & 0x0f;
size_t header_length = 12u + cc * 4u;
if (x) {
if (packet_length < 12u + cc * 4u + 4u) {
return; // Don't read outside the packet.
}
size_t x_len = ByteReader<uint16_t>::ReadBigEndian(header + 14 + cc * 4);
header_length += (x_len + 1) * 4;
}
std::unique_ptr<rtclog::Event> rtp_event(new rtclog::Event());
rtp_event->set_timestamp_us(rtc::TimeMicros());
rtp_event->set_type(rtclog::Event::RTP_EVENT);
rtp_event->mutable_rtp_packet()->set_incoming(direction == kIncomingPacket);
rtp_event->mutable_rtp_packet()->set_packet_length(packet_length);
rtp_event->mutable_rtp_packet()->set_header(header, header_length);
if (probe_cluster_id != PacedPacketInfo::kNotAProbe)
rtp_event->mutable_rtp_packet()->set_probe_cluster_id(probe_cluster_id);
StoreEvent(std::move(rtp_event));
}
void RtcEventLogImpl::LogRtcpPacket(PacketDirection direction,
const uint8_t* packet,
size_t length) {
std::unique_ptr<rtclog::Event> rtcp_event(new rtclog::Event());
rtcp_event->set_timestamp_us(rtc::TimeMicros());
rtcp_event->set_type(rtclog::Event::RTCP_EVENT);
rtcp_event->mutable_rtcp_packet()->set_incoming(direction == kIncomingPacket);
rtcp::CommonHeader header;
const uint8_t* block_begin = packet;
const uint8_t* packet_end = packet + length;
RTC_DCHECK(length <= IP_PACKET_SIZE);
uint8_t buffer[IP_PACKET_SIZE];
uint32_t buffer_length = 0;
while (block_begin < packet_end) {
if (!header.Parse(block_begin, packet_end - block_begin)) {
break; // Incorrect message header.
}
const uint8_t* next_block = header.NextPacket();
uint32_t block_size = next_block - block_begin;
switch (header.type()) {
case rtcp::SenderReport::kPacketType:
case rtcp::ReceiverReport::kPacketType:
case rtcp::Bye::kPacketType:
case rtcp::ExtendedJitterReport::kPacketType:
case rtcp::Rtpfb::kPacketType:
case rtcp::Psfb::kPacketType:
case rtcp::ExtendedReports::kPacketType:
// We log sender reports, receiver reports, bye messages
// inter-arrival jitter, third-party loss reports, payload-specific
// feedback and extended reports.
memcpy(buffer + buffer_length, block_begin, block_size);
buffer_length += block_size;
break;
case rtcp::Sdes::kPacketType:
case rtcp::App::kPacketType:
default:
// We don't log sender descriptions, application defined messages
// or message blocks of unknown type.
break;
}
block_begin += block_size;
}
rtcp_event->mutable_rtcp_packet()->set_packet_data(buffer, buffer_length);
StoreEvent(std::move(rtcp_event));
}
void RtcEventLogImpl::LogAudioPlayout(uint32_t ssrc) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::AUDIO_PLAYOUT_EVENT);
auto playout_event = event->mutable_audio_playout_event();
playout_event->set_local_ssrc(ssrc);
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogLossBasedBweUpdate(int32_t bitrate_bps,
uint8_t fraction_loss,
int32_t total_packets) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::LOSS_BASED_BWE_UPDATE);
auto bwe_event = event->mutable_loss_based_bwe_update();
bwe_event->set_bitrate_bps(bitrate_bps);
bwe_event->set_fraction_loss(fraction_loss);
bwe_event->set_total_packets(total_packets);
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogDelayBasedBweUpdate(int32_t bitrate_bps,
BandwidthUsage detector_state) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::DELAY_BASED_BWE_UPDATE);
auto bwe_event = event->mutable_delay_based_bwe_update();
bwe_event->set_bitrate_bps(bitrate_bps);
bwe_event->set_detector_state(ConvertDetectorState(detector_state));
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogAudioNetworkAdaptation(
const AudioEncoderRuntimeConfig& config) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::AUDIO_NETWORK_ADAPTATION_EVENT);
auto audio_network_adaptation = event->mutable_audio_network_adaptation();
if (config.bitrate_bps)
audio_network_adaptation->set_bitrate_bps(*config.bitrate_bps);
if (config.frame_length_ms)
audio_network_adaptation->set_frame_length_ms(*config.frame_length_ms);
if (config.uplink_packet_loss_fraction) {
audio_network_adaptation->set_uplink_packet_loss_fraction(
*config.uplink_packet_loss_fraction);
}
if (config.enable_fec)
audio_network_adaptation->set_enable_fec(*config.enable_fec);
if (config.enable_dtx)
audio_network_adaptation->set_enable_dtx(*config.enable_dtx);
if (config.num_channels)
audio_network_adaptation->set_num_channels(*config.num_channels);
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogProbeClusterCreated(int id,
int bitrate_bps,
int min_probes,
int min_bytes) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::BWE_PROBE_CLUSTER_CREATED_EVENT);
auto probe_cluster = event->mutable_probe_cluster();
probe_cluster->set_id(id);
probe_cluster->set_bitrate_bps(bitrate_bps);
probe_cluster->set_min_packets(min_probes);
probe_cluster->set_min_bytes(min_bytes);
StoreEvent(std::move(event));
}
void RtcEventLogImpl::LogProbeResultSuccess(int id, int bitrate_bps) {
LogProbeResult(id, rtclog::BweProbeResult::SUCCESS, bitrate_bps);
}
void RtcEventLogImpl::LogProbeResultFailure(int id,
ProbeFailureReason failure_reason) {
rtclog::BweProbeResult::ResultType result =
ConvertProbeResultType(failure_reason);
LogProbeResult(id, result, -1);
}
void RtcEventLogImpl::LogProbeResult(int id,
rtclog::BweProbeResult::ResultType result,
int bitrate_bps) {
std::unique_ptr<rtclog::Event> event(new rtclog::Event());
event->set_timestamp_us(rtc::TimeMicros());
event->set_type(rtclog::Event::BWE_PROBE_RESULT_EVENT);
auto probe_result = event->mutable_probe_result();
probe_result->set_id(id);
probe_result->set_result(result);
if (result == rtclog::BweProbeResult::SUCCESS)
probe_result->set_bitrate_bps(bitrate_bps);
StoreEvent(std::move(event));
}
void RtcEventLogImpl::StartLoggingInternal(std::unique_ptr<FileWrapper> file,
int64_t max_size_bytes) {
LOG(LS_INFO) << "Starting WebRTC event log.";
max_size_bytes = (max_size_bytes <= 0)
? std::numeric_limits<decltype(max_size_bytes)>::max()
: max_size_bytes;
auto file_handler = [this,
max_size_bytes](std::unique_ptr<FileWrapper> file) {
RTC_DCHECK_RUN_ON(&task_queue_);
if (!file_->is_open()) {
max_size_bytes_ = max_size_bytes;
file_ = std::move(file);
StartLogFile();
} else {
// Already started. Ignore message and close file handle.
file->CloseFile();
}
};
task_queue_.PostTask(rtc::MakeUnique<ResourceOwningTask<FileWrapper>>(
std::move(file), file_handler));
}
void RtcEventLogImpl::StoreEvent(std::unique_ptr<rtclog::Event> event) {
RTC_DCHECK(event);
auto event_handler = [this](std::unique_ptr<rtclog::Event> rtclog_event) {
RTC_DCHECK_RUN_ON(&task_queue_);
if (file_->is_open()) {
LogToFile(std::move(rtclog_event));
} else {
LogToMemory(std::move(rtclog_event));
}
};
task_queue_.PostTask(rtc::MakeUnique<ResourceOwningTask<rtclog::Event>>(
std::move(event), event_handler));
}
bool RtcEventLogImpl::AppendEventToString(rtclog::Event* event,
ProtoString* output_string) {
RTC_DCHECK_RUN_ON(&task_queue_);
// Even though we're only serializing a single event during this call, what
// we intend to get is a list of events, with a tag and length preceding
// each actual event. To produce that, we serialize a list of a single event.
// If we later serialize additional events, the resulting ProtoString will
// be a proper concatenation of all those events.
rtclog::EventStream event_stream;
event_stream.add_stream();
// As a tweak, we swap the new event into the event-stream, write that to
// file, then swap back. This saves on some copying.
rtclog::Event* output_event = event_stream.mutable_stream(0);
output_event->Swap(event);
bool appended;
size_t potential_new_size =
written_bytes_ + output_string->size() + event_stream.ByteSize();
if (potential_new_size <= max_size_bytes_) {
event_stream.AppendToString(output_string);
appended = true;
} else {
appended = false;
}
// When the function returns, the original Event will be unchanged.
output_event->Swap(event);
return appended;
}
void RtcEventLogImpl::LogToMemory(std::unique_ptr<rtclog::Event> event) {
RTC_DCHECK_RUN_ON(&task_queue_);
RTC_DCHECK(!file_->is_open());
if (IsConfigEvent(*event.get())) {
config_history_.push_back(std::move(event));
} else {
history_.push_back(std::move(event));
if (history_.size() > kEventsInHistory) {
history_.pop_front();
}
}
}
void RtcEventLogImpl::StartLogFile() {
RTC_DCHECK_RUN_ON(&task_queue_);
RTC_DCHECK(file_->is_open());
ProtoString output_string;
// Create and serialize the LOG_START event.
// The timestamp used will correspond to when logging has started. The log
// may contain events earlier than the LOG_START event. (In general, the
// timestamps in the log are not monotonic.)
rtclog::Event start_event;
start_event.set_timestamp_us(rtc::TimeMicros());
start_event.set_type(rtclog::Event::LOG_START);
bool appended = AppendEventToString(&start_event, &output_string);
// Serialize the config information for all old streams, including streams
// which were already logged to previous files.
for (auto& event : config_history_) {
if (!appended) {
break;
}
appended = AppendEventToString(event.get(), &output_string);
}
// Serialize the events in the event queue.
while (appended && !history_.empty()) {
appended = AppendEventToString(history_.front().get(), &output_string);
if (appended) {
// Known issue - if writing to the file fails, these events will have
// been lost. If we try to open a new file, these events will be missing
// from it.
history_.pop_front();
}
}
// Write to file.
if (!file_->Write(output_string.data(), output_string.size())) {
LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
// The current FileWrapper implementation closes the file on error.
RTC_DCHECK(!file_->is_open());
return;
}
written_bytes_ += output_string.size();
if (!appended) {
RTC_DCHECK(file_->is_open());
StopLogFile(rtc::TimeMicros());
}
}
void RtcEventLogImpl::LogToFile(std::unique_ptr<rtclog::Event> event) {
RTC_DCHECK_RUN_ON(&task_queue_);
RTC_DCHECK(file_->is_open());
ProtoString output_string;
bool appended = AppendEventToString(event.get(), &output_string);
if (IsConfigEvent(*event.get())) {
config_history_.push_back(std::move(event));
}
if (!appended) {
RTC_DCHECK(file_->is_open());
history_.push_back(std::move(event));
StopLogFile(rtc::TimeMicros());
return;
}
// Write string to file.
if (file_->Write(output_string.data(), output_string.size())) {
written_bytes_ += output_string.size();
} else {
LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
// The current FileWrapper implementation closes the file on error.
RTC_DCHECK(!file_->is_open());
}
}
void RtcEventLogImpl::StopLogFile(int64_t stop_time) {
RTC_DCHECK_RUN_ON(&task_queue_);
RTC_DCHECK(file_->is_open());
ProtoString output_string;
rtclog::Event end_event;
end_event.set_timestamp_us(stop_time);
end_event.set_type(rtclog::Event::LOG_END);
bool appended = AppendEventToString(&end_event, &output_string);
if (appended) {
if (!file_->Write(output_string.data(), output_string.size())) {
LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
// The current FileWrapper implementation closes the file on error.
RTC_DCHECK(!file_->is_open());
}
written_bytes_ += output_string.size();
}
max_size_bytes_ = std::numeric_limits<decltype(max_size_bytes_)>::max();
written_bytes_ = 0;
file_->CloseFile();
RTC_DCHECK(!file_->is_open());
}
bool RtcEventLog::ParseRtcEventLog(const std::string& file_name,
rtclog::EventStream* result) {
char tmp_buffer[1024];
int bytes_read = 0;
std::unique_ptr<FileWrapper> dump_file(FileWrapper::Create());
if (!dump_file->OpenFile(file_name.c_str(), true)) {
return false;
}
ProtoString dump_buffer;
while ((bytes_read = dump_file->Read(tmp_buffer, sizeof(tmp_buffer))) > 0) {
dump_buffer.append(tmp_buffer, bytes_read);
}
dump_file->CloseFile();
return result->ParseFromString(dump_buffer);
}
#endif // ENABLE_RTC_EVENT_LOG
// RtcEventLog member functions.
std::unique_ptr<RtcEventLog> RtcEventLog::Create() {
#ifdef ENABLE_RTC_EVENT_LOG
// TODO(eladalon): Known issue - there's a race over |log_count_| here.
constexpr int kMaxLogCount = 5;
int count = 1 + std::atomic_fetch_add(&RtcEventLogImpl::log_count_, 1);
if (count > kMaxLogCount) {
LOG(LS_WARNING) << "Denied creation of additional WebRTC event logs. "
<< count - 1 << " logs open already.";
std::atomic_fetch_sub(&RtcEventLogImpl::log_count_, 1);
return std::unique_ptr<RtcEventLog>(new RtcEventLogNullImpl());
}
return std::unique_ptr<RtcEventLog>(new RtcEventLogImpl());
#else
return CreateNull();
#endif // ENABLE_RTC_EVENT_LOG
}
std::unique_ptr<RtcEventLog> RtcEventLog::CreateNull() {
return std::unique_ptr<RtcEventLog>(new RtcEventLogNullImpl());
}
} // namespace webrtc