Move talk/app/webrtc to webrtc/api

talk/app/webrtc/statscollector.cc

Index: talk/app/webrtc/statscollector.cc
diff --git a/talk/app/webrtc/statscollector.cc b/talk/app/webrtc/statscollector.cc
deleted file mode 100644
index 883766a36c0909d4bb764f807eb364e425481726..0000000000000000000000000000000000000000
--- a/talk/app/webrtc/statscollector.cc
+++ /dev/null
@@ -1,962 +0,0 @@
-/*
- * libjingle
- * Copyright 2012 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "talk/app/webrtc/statscollector.h"
-
-#include <utility>
-#include <vector>
-
-#include "talk/app/webrtc/peerconnection.h"
-#include "talk/session/media/channel.h"
-#include "webrtc/base/base64.h"
-#include "webrtc/base/checks.h"
-#include "webrtc/base/scoped_ptr.h"
-#include "webrtc/base/timing.h"
-
-using rtc::scoped_ptr;
-
-namespace webrtc {
-namespace {
-
-// The following is the enum RTCStatsIceCandidateType from
-// http://w3c.github.io/webrtc-stats/#rtcstatsicecandidatetype-enum such that
-// our stats report for ice candidate type could conform to that.
-const char STATSREPORT_LOCAL_PORT_TYPE[] = "host";
-const char STATSREPORT_STUN_PORT_TYPE[] = "serverreflexive";
-const char STATSREPORT_PRFLX_PORT_TYPE[] = "peerreflexive";
-const char STATSREPORT_RELAY_PORT_TYPE[] = "relayed";
-
-// Strings used by the stats collector to report adapter types. This fits the
-// general stype of http://w3c.github.io/webrtc-stats than what
-// AdapterTypeToString does.
-const char* STATSREPORT_ADAPTER_TYPE_ETHERNET = "lan";
-const char* STATSREPORT_ADAPTER_TYPE_WIFI = "wlan";
-const char* STATSREPORT_ADAPTER_TYPE_WWAN = "wwan";
-const char* STATSREPORT_ADAPTER_TYPE_VPN = "vpn";
-const char* STATSREPORT_ADAPTER_TYPE_LOOPBACK = "loopback";
-
-template<typename ValueType>
-struct TypeForAdd {
-  const StatsReport::StatsValueName name;
-  const ValueType& value;
-};
-
-typedef TypeForAdd<bool> BoolForAdd;
-typedef TypeForAdd<float> FloatForAdd;
-typedef TypeForAdd<int64_t> Int64ForAdd;
-typedef TypeForAdd<int> IntForAdd;
-
-StatsReport::Id GetTransportIdFromProxy(const ProxyTransportMap& map,
-                                        const std::string& proxy) {
-  RTC_DCHECK(!proxy.empty());
-  auto found = map.find(proxy);
-  if (found == map.end()) {
-    return StatsReport::Id();
-  }
-
-  return StatsReport::NewComponentId(
-      found->second, cricket::ICE_CANDIDATE_COMPONENT_RTP);
-}
-
-StatsReport* AddTrackReport(StatsCollection* reports,
-                            const std::string& track_id) {
-  // Adds an empty track report.
-  StatsReport::Id id(
-      StatsReport::NewTypedId(StatsReport::kStatsReportTypeTrack, track_id));
-  StatsReport* report = reports->ReplaceOrAddNew(id);
-  report->AddString(StatsReport::kStatsValueNameTrackId, track_id);
-  return report;
-}
-
-template <class TrackVector>
-void CreateTrackReports(const TrackVector& tracks, StatsCollection* reports,
-                        TrackIdMap& track_ids) {
-  for (const auto& track : tracks) {
-    const std::string& track_id = track->id();
-    StatsReport* report = AddTrackReport(reports, track_id);
-    RTC_DCHECK(report != nullptr);
-    track_ids[track_id] = report;
-  }
-}
-
-void ExtractCommonSendProperties(const cricket::MediaSenderInfo& info,
-                                 StatsReport* report) {
-  report->AddString(StatsReport::kStatsValueNameCodecName, info.codec_name);
-  report->AddInt64(StatsReport::kStatsValueNameBytesSent, info.bytes_sent);
-  report->AddInt64(StatsReport::kStatsValueNameRtt, info.rtt_ms);
-}
-
-void ExtractCommonReceiveProperties(const cricket::MediaReceiverInfo& info,
-                                    StatsReport* report) {
-  report->AddString(StatsReport::kStatsValueNameCodecName, info.codec_name);
-}
-
-void SetAudioProcessingStats(StatsReport* report,
-                             bool typing_noise_detected,
-                             int echo_return_loss,
-                             int echo_return_loss_enhancement,
-                             int echo_delay_median_ms,
-                             float aec_quality_min,
-                             int echo_delay_std_ms) {
-  report->AddBoolean(StatsReport::kStatsValueNameTypingNoiseState,
-                     typing_noise_detected);
-  report->AddFloat(StatsReport::kStatsValueNameEchoCancellationQualityMin,
-                   aec_quality_min);
-  const IntForAdd ints[] = {
-    { StatsReport::kStatsValueNameEchoReturnLoss, echo_return_loss },
-    { StatsReport::kStatsValueNameEchoReturnLossEnhancement,
-      echo_return_loss_enhancement },
-    { StatsReport::kStatsValueNameEchoDelayMedian, echo_delay_median_ms },
-    { StatsReport::kStatsValueNameEchoDelayStdDev, echo_delay_std_ms },
-  };
-  for (const auto& i : ints)
-    report->AddInt(i.name, i.value);
-}
-
-void ExtractStats(const cricket::VoiceReceiverInfo& info, StatsReport* report) {
-  ExtractCommonReceiveProperties(info, report);
-  const FloatForAdd floats[] = {
-    { StatsReport::kStatsValueNameExpandRate, info.expand_rate },
-    { StatsReport::kStatsValueNameSecondaryDecodedRate,
-      info.secondary_decoded_rate },
-    { StatsReport::kStatsValueNameSpeechExpandRate, info.speech_expand_rate },
-    { StatsReport::kStatsValueNameAccelerateRate, info.accelerate_rate },
-    { StatsReport::kStatsValueNamePreemptiveExpandRate,
-      info.preemptive_expand_rate },
-  };
-
-  const IntForAdd ints[] = {
-    { StatsReport::kStatsValueNameAudioOutputLevel, info.audio_level },
-    { StatsReport::kStatsValueNameCurrentDelayMs, info.delay_estimate_ms },
-    { StatsReport::kStatsValueNameDecodingCNG, info.decoding_cng },
-    { StatsReport::kStatsValueNameDecodingCTN, info.decoding_calls_to_neteq },
-    { StatsReport::kStatsValueNameDecodingCTSG,
-      info.decoding_calls_to_silence_generator },
-    { StatsReport::kStatsValueNameDecodingNormal, info.decoding_normal },
-    { StatsReport::kStatsValueNameDecodingPLC, info.decoding_plc },
-    { StatsReport::kStatsValueNameDecodingPLCCNG, info.decoding_plc_cng },
-    { StatsReport::kStatsValueNameJitterBufferMs, info.jitter_buffer_ms },
-    { StatsReport::kStatsValueNameJitterReceived, info.jitter_ms },
-    { StatsReport::kStatsValueNamePacketsLost, info.packets_lost },
-    { StatsReport::kStatsValueNamePacketsReceived, info.packets_rcvd },
-    { StatsReport::kStatsValueNamePreferredJitterBufferMs,
-      info.jitter_buffer_preferred_ms },
-  };
-
-  for (const auto& f : floats)
-    report->AddFloat(f.name, f.value);
-
-  for (const auto& i : ints)
-    report->AddInt(i.name, i.value);
-
-  report->AddInt64(StatsReport::kStatsValueNameBytesReceived,
-                   info.bytes_rcvd);
-  report->AddInt64(StatsReport::kStatsValueNameCaptureStartNtpTimeMs,
-                   info.capture_start_ntp_time_ms);
-  report->AddString(StatsReport::kStatsValueNameMediaType, "audio");
-}
-
-void ExtractStats(const cricket::VoiceSenderInfo& info, StatsReport* report) {
-  ExtractCommonSendProperties(info, report);
-
-  SetAudioProcessingStats(
-      report, info.typing_noise_detected, info.echo_return_loss,
-      info.echo_return_loss_enhancement, info.echo_delay_median_ms,
-      info.aec_quality_min, info.echo_delay_std_ms);
-
-  RTC_DCHECK_GE(info.audio_level, 0);
-  const IntForAdd ints[] = {
-    { StatsReport::kStatsValueNameAudioInputLevel, info.audio_level},
-    { StatsReport::kStatsValueNameJitterReceived, info.jitter_ms },
-    { StatsReport::kStatsValueNamePacketsLost, info.packets_lost },
-    { StatsReport::kStatsValueNamePacketsSent, info.packets_sent },
-  };
-
-  for (const auto& i : ints)
-    report->AddInt(i.name, i.value);
-  report->AddString(StatsReport::kStatsValueNameMediaType, "audio");
-}
-
-void ExtractStats(const cricket::VideoReceiverInfo& info, StatsReport* report) {
-  ExtractCommonReceiveProperties(info, report);
-  report->AddString(StatsReport::kStatsValueNameCodecImplementationName,
-                    info.decoder_implementation_name);
-  report->AddInt64(StatsReport::kStatsValueNameBytesReceived,
-                   info.bytes_rcvd);
-  report->AddInt64(StatsReport::kStatsValueNameCaptureStartNtpTimeMs,
-                   info.capture_start_ntp_time_ms);
-  const IntForAdd ints[] = {
-    { StatsReport::kStatsValueNameCurrentDelayMs, info.current_delay_ms },
-    { StatsReport::kStatsValueNameDecodeMs, info.decode_ms },
-    { StatsReport::kStatsValueNameFirsSent, info.firs_sent },
-    { StatsReport::kStatsValueNameFrameHeightReceived, info.frame_height },
-    { StatsReport::kStatsValueNameFrameRateDecoded, info.framerate_decoded },
-    { StatsReport::kStatsValueNameFrameRateOutput, info.framerate_output },
-    { StatsReport::kStatsValueNameFrameRateReceived, info.framerate_rcvd },
-    { StatsReport::kStatsValueNameFrameWidthReceived, info.frame_width },
-    { StatsReport::kStatsValueNameJitterBufferMs, info.jitter_buffer_ms },
-    { StatsReport::kStatsValueNameMaxDecodeMs, info.max_decode_ms },
-    { StatsReport::kStatsValueNameMinPlayoutDelayMs,
-      info.min_playout_delay_ms },
-    { StatsReport::kStatsValueNameNacksSent, info.nacks_sent },
-    { StatsReport::kStatsValueNamePacketsLost, info.packets_lost },
-    { StatsReport::kStatsValueNamePacketsReceived, info.packets_rcvd },
-    { StatsReport::kStatsValueNamePlisSent, info.plis_sent },
-    { StatsReport::kStatsValueNameRenderDelayMs, info.render_delay_ms },
-    { StatsReport::kStatsValueNameTargetDelayMs, info.target_delay_ms },
-  };
-
-  for (const auto& i : ints)
-    report->AddInt(i.name, i.value);
-  report->AddString(StatsReport::kStatsValueNameMediaType, "video");
-}
-
-void ExtractStats(const cricket::VideoSenderInfo& info, StatsReport* report) {
-  ExtractCommonSendProperties(info, report);
-
-  report->AddString(StatsReport::kStatsValueNameCodecImplementationName,
-                    info.encoder_implementation_name);
-  report->AddBoolean(StatsReport::kStatsValueNameBandwidthLimitedResolution,
-                     (info.adapt_reason & 0x2) > 0);
-  report->AddBoolean(StatsReport::kStatsValueNameCpuLimitedResolution,
-                     (info.adapt_reason & 0x1) > 0);
-  report->AddBoolean(StatsReport::kStatsValueNameViewLimitedResolution,
-                     (info.adapt_reason & 0x4) > 0);
-
-  const IntForAdd ints[] = {
-    { StatsReport::kStatsValueNameAdaptationChanges, info.adapt_changes },
-    { StatsReport::kStatsValueNameAvgEncodeMs, info.avg_encode_ms },
-    { StatsReport::kStatsValueNameEncodeUsagePercent,
-      info.encode_usage_percent },
-    { StatsReport::kStatsValueNameFirsReceived, info.firs_rcvd },
-    { StatsReport::kStatsValueNameFrameHeightInput, info.input_frame_height },
-    { StatsReport::kStatsValueNameFrameHeightSent, info.send_frame_height },
-    { StatsReport::kStatsValueNameFrameRateInput, info.framerate_input },
-    { StatsReport::kStatsValueNameFrameRateSent, info.framerate_sent },
-    { StatsReport::kStatsValueNameFrameWidthInput, info.input_frame_width },
-    { StatsReport::kStatsValueNameFrameWidthSent, info.send_frame_width },
-    { StatsReport::kStatsValueNameNacksReceived, info.nacks_rcvd },
-    { StatsReport::kStatsValueNamePacketsLost, info.packets_lost },
-    { StatsReport::kStatsValueNamePacketsSent, info.packets_sent },
-    { StatsReport::kStatsValueNamePlisReceived, info.plis_rcvd },
-  };
-
-  for (const auto& i : ints)
-    report->AddInt(i.name, i.value);
-  report->AddString(StatsReport::kStatsValueNameMediaType, "video");
-}
-
-void ExtractStats(const cricket::BandwidthEstimationInfo& info,
-                  double stats_gathering_started,
-                  PeerConnectionInterface::StatsOutputLevel level,
-                  StatsReport* report) {
-  RTC_DCHECK(report->type() == StatsReport::kStatsReportTypeBwe);
-
-  report->set_timestamp(stats_gathering_started);
-  const IntForAdd ints[] = {
-    { StatsReport::kStatsValueNameAvailableSendBandwidth,
-      info.available_send_bandwidth },
-    { StatsReport::kStatsValueNameAvailableReceiveBandwidth,
-      info.available_recv_bandwidth },
-    { StatsReport::kStatsValueNameTargetEncBitrate, info.target_enc_bitrate },
-    { StatsReport::kStatsValueNameActualEncBitrate, info.actual_enc_bitrate },
-    { StatsReport::kStatsValueNameRetransmitBitrate, info.retransmit_bitrate },
-    { StatsReport::kStatsValueNameTransmitBitrate, info.transmit_bitrate },
-  };
-  for (const auto& i : ints)
-    report->AddInt(i.name, i.value);
-  report->AddInt64(StatsReport::kStatsValueNameBucketDelay, info.bucket_delay);
-}
-
-void ExtractRemoteStats(const cricket::MediaSenderInfo& info,
-                        StatsReport* report) {
-  report->set_timestamp(info.remote_stats[0].timestamp);
-  // TODO(hta): Extract some stats here.
-}
-
-void ExtractRemoteStats(const cricket::MediaReceiverInfo& info,
-                        StatsReport* report) {
-  report->set_timestamp(info.remote_stats[0].timestamp);
-  // TODO(hta): Extract some stats here.
-}
-
-// Template to extract stats from a data vector.
-// In order to use the template, the functions that are called from it,
-// ExtractStats and ExtractRemoteStats, must be defined and overloaded
-// for each type.
-template<typename T>
-void ExtractStatsFromList(const std::vector<T>& data,
-                          const StatsReport::Id& transport_id,
-                          StatsCollector* collector,
-                          StatsReport::Direction direction) {
-  for (const auto& d : data) {
-    uint32_t ssrc = d.ssrc();
-    // Each track can have stats for both local and remote objects.
-    // TODO(hta): Handle the case of multiple SSRCs per object.
-    StatsReport* report = collector->PrepareReport(true, ssrc, transport_id,
-                                                   direction);
-    if (report)
-      ExtractStats(d, report);
-
-    if (!d.remote_stats.empty()) {
-      report = collector->PrepareReport(false, ssrc, transport_id, direction);
-      if (report)
-        ExtractRemoteStats(d, report);
-    }
-  }
-}
-
-}  // namespace
-
-const char* IceCandidateTypeToStatsType(const std::string& candidate_type) {
-  if (candidate_type == cricket::LOCAL_PORT_TYPE) {
-    return STATSREPORT_LOCAL_PORT_TYPE;
-  }
-  if (candidate_type == cricket::STUN_PORT_TYPE) {
-    return STATSREPORT_STUN_PORT_TYPE;
-  }
-  if (candidate_type == cricket::PRFLX_PORT_TYPE) {
-    return STATSREPORT_PRFLX_PORT_TYPE;
-  }
-  if (candidate_type == cricket::RELAY_PORT_TYPE) {
-    return STATSREPORT_RELAY_PORT_TYPE;
-  }
-  RTC_DCHECK(false);
-  return "unknown";
-}
-
-const char* AdapterTypeToStatsType(rtc::AdapterType type) {
-  switch (type) {
-    case rtc::ADAPTER_TYPE_UNKNOWN:
-      return "unknown";
-    case rtc::ADAPTER_TYPE_ETHERNET:
-      return STATSREPORT_ADAPTER_TYPE_ETHERNET;
-    case rtc::ADAPTER_TYPE_WIFI:
-      return STATSREPORT_ADAPTER_TYPE_WIFI;
-    case rtc::ADAPTER_TYPE_CELLULAR:
-      return STATSREPORT_ADAPTER_TYPE_WWAN;
-    case rtc::ADAPTER_TYPE_VPN:
-      return STATSREPORT_ADAPTER_TYPE_VPN;
-    case rtc::ADAPTER_TYPE_LOOPBACK:
-      return STATSREPORT_ADAPTER_TYPE_LOOPBACK;
-    default:
-      RTC_DCHECK(false);
-      return "";
-  }
-}
-
-StatsCollector::StatsCollector(PeerConnection* pc)
-    : pc_(pc), stats_gathering_started_(0) {
-  RTC_DCHECK(pc_);
-}
-
-StatsCollector::~StatsCollector() {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-}
-
-double StatsCollector::GetTimeNow() {
-  return rtc::Timing::WallTimeNow() * rtc::kNumMillisecsPerSec;
-}
-
-// Adds a MediaStream with tracks that can be used as a |selector| in a call
-// to GetStats.
-void StatsCollector::AddStream(MediaStreamInterface* stream) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  RTC_DCHECK(stream != NULL);
-
-  CreateTrackReports<AudioTrackVector>(stream->GetAudioTracks(),
-                                       &reports_, track_ids_);
-  CreateTrackReports<VideoTrackVector>(stream->GetVideoTracks(),
-                                       &reports_, track_ids_);
-}
-
-void StatsCollector::AddLocalAudioTrack(AudioTrackInterface* audio_track,
-                                        uint32_t ssrc) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  RTC_DCHECK(audio_track != NULL);
-#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
-  for (const auto& track : local_audio_tracks_)
-    RTC_DCHECK(track.first != audio_track || track.second != ssrc);
-#endif
-
-  local_audio_tracks_.push_back(std::make_pair(audio_track, ssrc));
-
-  // Create the kStatsReportTypeTrack report for the new track if there is no
-  // report yet.
-  StatsReport::Id id(StatsReport::NewTypedId(StatsReport::kStatsReportTypeTrack,
-                                             audio_track->id()));
-  StatsReport* report = reports_.Find(id);
-  if (!report) {
-    report = reports_.InsertNew(id);
-    report->AddString(StatsReport::kStatsValueNameTrackId, audio_track->id());
-  }
-}
-
-void StatsCollector::RemoveLocalAudioTrack(AudioTrackInterface* audio_track,
-                                           uint32_t ssrc) {
-  RTC_DCHECK(audio_track != NULL);
-  local_audio_tracks_.erase(std::remove_if(local_audio_tracks_.begin(),
-      local_audio_tracks_.end(),
-      [audio_track, ssrc](const LocalAudioTrackVector::value_type& track) {
-        return track.first == audio_track && track.second == ssrc;
-      }));
-}
-
-void StatsCollector::GetStats(MediaStreamTrackInterface* track,
-                              StatsReports* reports) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  RTC_DCHECK(reports != NULL);
-  RTC_DCHECK(reports->empty());
-
-  rtc::Thread::ScopedDisallowBlockingCalls no_blocking_calls;
-
-  if (!track) {
-    reports->reserve(reports_.size());
-    for (auto* r : reports_)
-      reports->push_back(r);
-    return;
-  }
-
-  StatsReport* report = reports_.Find(StatsReport::NewTypedId(
-      StatsReport::kStatsReportTypeSession, pc_->session()->id()));
-  if (report)
-    reports->push_back(report);
-
-  report = reports_.Find(StatsReport::NewTypedId(
-      StatsReport::kStatsReportTypeTrack, track->id()));
-
-  if (!report)
-    return;
-
-  reports->push_back(report);
-
-  std::string track_id;
-  for (const auto* r : reports_) {
-    if (r->type() != StatsReport::kStatsReportTypeSsrc)
-      continue;
-
-    const StatsReport::Value* v =
-        r->FindValue(StatsReport::kStatsValueNameTrackId);
-    if (v && v->string_val() == track->id())
-      reports->push_back(r);
-  }
-}
-
-void
-StatsCollector::UpdateStats(PeerConnectionInterface::StatsOutputLevel level) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  double time_now = GetTimeNow();
-  // Calls to UpdateStats() that occur less than kMinGatherStatsPeriod number of
-  // ms apart will be ignored.
-  const double kMinGatherStatsPeriod = 50;
-  if (stats_gathering_started_ != 0 &&
-      stats_gathering_started_ + kMinGatherStatsPeriod > time_now) {
-    return;
-  }
-  stats_gathering_started_ = time_now;
-
-  if (pc_->session()) {
-    // TODO(tommi): All of these hop over to the worker thread to fetch
-    // information.  We could use an AsyncInvoker to run all of these and post
-    // the information back to the signaling thread where we can create and
-    // update stats reports.  That would also clean up the threading story a bit
-    // since we'd be creating/updating the stats report objects consistently on
-    // the same thread (this class has no locks right now).
-    ExtractSessionInfo();
-    ExtractVoiceInfo();
-    ExtractVideoInfo(level);
-    ExtractDataInfo();
-    UpdateTrackReports();
-  }
-}
-
-StatsReport* StatsCollector::PrepareReport(
-    bool local,
-    uint32_t ssrc,
-    const StatsReport::Id& transport_id,
-    StatsReport::Direction direction) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  StatsReport::Id id(StatsReport::NewIdWithDirection(
-      local ? StatsReport::kStatsReportTypeSsrc
-            : StatsReport::kStatsReportTypeRemoteSsrc,
-      rtc::ToString<uint32_t>(ssrc), direction));
-  StatsReport* report = reports_.Find(id);
-
-  // Use the ID of the track that is currently mapped to the SSRC, if any.
-  std::string track_id;
-  if (!GetTrackIdBySsrc(ssrc, &track_id, direction)) {
-    if (!report) {
-      // The ssrc is not used by any track or existing report, return NULL
-      // in such case to indicate no report is prepared for the ssrc.
-      return NULL;
-    }
-
-    // The ssrc is not used by any existing track. Keeps the old track id
-    // since we want to report the stats for inactive ssrc.
-    const StatsReport::Value* v =
-        report->FindValue(StatsReport::kStatsValueNameTrackId);
-    if (v)
-      track_id = v->string_val();
-  }
-
-  if (!report)
-    report = reports_.InsertNew(id);
-
-  // FYI - for remote reports, the timestamp will be overwritten later.
-  report->set_timestamp(stats_gathering_started_);
-
-  report->AddInt64(StatsReport::kStatsValueNameSsrc, ssrc);
-  report->AddString(StatsReport::kStatsValueNameTrackId, track_id);
-  // Add the mapping of SSRC to transport.
-  report->AddId(StatsReport::kStatsValueNameTransportId, transport_id);
-  return report;
-}
-
-StatsReport* StatsCollector::AddOneCertificateReport(
-    const rtc::SSLCertificate* cert, const StatsReport* issuer) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-
-  // TODO(bemasc): Move this computation to a helper class that caches these
-  // values to reduce CPU use in GetStats.  This will require adding a fast
-  // SSLCertificate::Equals() method to detect certificate changes.
-
-  std::string digest_algorithm;
-  if (!cert->GetSignatureDigestAlgorithm(&digest_algorithm))
-    return nullptr;
-
-  rtc::scoped_ptr<rtc::SSLFingerprint> ssl_fingerprint(
-      rtc::SSLFingerprint::Create(digest_algorithm, cert));
-
-  // SSLFingerprint::Create can fail if the algorithm returned by
-  // SSLCertificate::GetSignatureDigestAlgorithm is not supported by the
-  // implementation of SSLCertificate::ComputeDigest.  This currently happens
-  // with MD5- and SHA-224-signed certificates when linked to libNSS.
-  if (!ssl_fingerprint)
-    return nullptr;
-
-  std::string fingerprint = ssl_fingerprint->GetRfc4572Fingerprint();
-
-  rtc::Buffer der_buffer;
-  cert->ToDER(&der_buffer);
-  std::string der_base64;
-  rtc::Base64::EncodeFromArray(der_buffer.data(), der_buffer.size(),
-                               &der_base64);
-
-  StatsReport::Id id(StatsReport::NewTypedId(
-      StatsReport::kStatsReportTypeCertificate, fingerprint));
-  StatsReport* report = reports_.ReplaceOrAddNew(id);
-  report->set_timestamp(stats_gathering_started_);
-  report->AddString(StatsReport::kStatsValueNameFingerprint, fingerprint);
-  report->AddString(StatsReport::kStatsValueNameFingerprintAlgorithm,
-                    digest_algorithm);
-  report->AddString(StatsReport::kStatsValueNameDer, der_base64);
-  if (issuer)
-    report->AddId(StatsReport::kStatsValueNameIssuerId, issuer->id());
-  return report;
-}
-
-StatsReport* StatsCollector::AddCertificateReports(
-    const rtc::SSLCertificate* cert) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  // Produces a chain of StatsReports representing this certificate and the rest
-  // of its chain, and adds those reports to |reports_|.  The return value is
-  // the id of the leaf report.  The provided cert must be non-null, so at least
-  // one report will always be provided and the returned string will never be
-  // empty.
-  RTC_DCHECK(cert != NULL);
-
-  StatsReport* issuer = nullptr;
-  rtc::scoped_ptr<rtc::SSLCertChain> chain;
-  if (cert->GetChain(chain.accept())) {
-    // This loop runs in reverse, i.e. from root to leaf, so that each
-    // certificate's issuer's report ID is known before the child certificate's
-    // report is generated.  The root certificate does not have an issuer ID
-    // value.
-    for (ptrdiff_t i = chain->GetSize() - 1; i >= 0; --i) {
-      const rtc::SSLCertificate& cert_i = chain->Get(i);
-      issuer = AddOneCertificateReport(&cert_i, issuer);
-    }
-  }
-  // Add the leaf certificate.
-  return AddOneCertificateReport(cert, issuer);
-}
-
-StatsReport* StatsCollector::AddConnectionInfoReport(
-    const std::string& content_name, int component, int connection_id,
-    const StatsReport::Id& channel_report_id,
-    const cricket::ConnectionInfo& info) {
-  StatsReport::Id id(StatsReport::NewCandidatePairId(content_name, component,
-                                                     connection_id));
-  StatsReport* report = reports_.ReplaceOrAddNew(id);
-  report->set_timestamp(stats_gathering_started_);
-
-  const BoolForAdd bools[] = {
-    {StatsReport::kStatsValueNameActiveConnection, info.best_connection},
-    {StatsReport::kStatsValueNameReceiving, info.receiving},
-    {StatsReport::kStatsValueNameWritable, info.writable},
-  };
-  for (const auto& b : bools)
-    report->AddBoolean(b.name, b.value);
-
-  report->AddId(StatsReport::kStatsValueNameChannelId, channel_report_id);
-  report->AddId(StatsReport::kStatsValueNameLocalCandidateId,
-                AddCandidateReport(info.local_candidate, true)->id());
-  report->AddId(StatsReport::kStatsValueNameRemoteCandidateId,
-                AddCandidateReport(info.remote_candidate, false)->id());
-
-  const Int64ForAdd int64s[] = {
-    { StatsReport::kStatsValueNameBytesReceived, info.recv_total_bytes },
-    { StatsReport::kStatsValueNameBytesSent, info.sent_total_bytes },
-    { StatsReport::kStatsValueNamePacketsSent, info.sent_total_packets },
-    { StatsReport::kStatsValueNameRtt, info.rtt },
-    { StatsReport::kStatsValueNameSendPacketsDiscarded,
-      info.sent_discarded_packets },
-  };
-  for (const auto& i : int64s)
-    report->AddInt64(i.name, i.value);
-
-  report->AddString(StatsReport::kStatsValueNameLocalAddress,
-                    info.local_candidate.address().ToString());
-  report->AddString(StatsReport::kStatsValueNameLocalCandidateType,
-                    info.local_candidate.type());
-  report->AddString(StatsReport::kStatsValueNameRemoteAddress,
-                    info.remote_candidate.address().ToString());
-  report->AddString(StatsReport::kStatsValueNameRemoteCandidateType,
-                    info.remote_candidate.type());
-  report->AddString(StatsReport::kStatsValueNameTransportType,
-                    info.local_candidate.protocol());
-
-  return report;
-}
-
-StatsReport* StatsCollector::AddCandidateReport(
-    const cricket::Candidate& candidate,
-    bool local) {
-  StatsReport::Id id(StatsReport::NewCandidateId(local, candidate.id()));
-  StatsReport* report = reports_.Find(id);
-  if (!report) {
-    report = reports_.InsertNew(id);
-    report->set_timestamp(stats_gathering_started_);
-    if (local) {
-      report->AddString(StatsReport::kStatsValueNameCandidateNetworkType,
-                        AdapterTypeToStatsType(candidate.network_type()));
-    }
-    report->AddString(StatsReport::kStatsValueNameCandidateIPAddress,
-                      candidate.address().ipaddr().ToString());
-    report->AddString(StatsReport::kStatsValueNameCandidatePortNumber,
-                      candidate.address().PortAsString());
-    report->AddInt(StatsReport::kStatsValueNameCandidatePriority,
-                   candidate.priority());
-    report->AddString(StatsReport::kStatsValueNameCandidateType,
-                      IceCandidateTypeToStatsType(candidate.type()));
-    report->AddString(StatsReport::kStatsValueNameCandidateTransportType,
-                      candidate.protocol());
-  }
-
-  return report;
-}
-
-void StatsCollector::ExtractSessionInfo() {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-
-  // Extract information from the base session.
-  StatsReport::Id id(StatsReport::NewTypedId(
-      StatsReport::kStatsReportTypeSession, pc_->session()->id()));
-  StatsReport* report = reports_.ReplaceOrAddNew(id);
-  report->set_timestamp(stats_gathering_started_);
-  report->AddBoolean(StatsReport::kStatsValueNameInitiator,
-                     pc_->session()->initial_offerer());
-
-  SessionStats stats;
-  if (!pc_->session()->GetTransportStats(&stats)) {
-    return;
-  }
-
-  // Store the proxy map away for use in SSRC reporting.
-  // TODO(tommi): This shouldn't be necessary if we post the stats back to the
-  // signaling thread after fetching them on the worker thread, then just use
-  // the proxy map directly from the session stats.
-  // As is, if GetStats() failed, we could be using old (incorrect?) proxy
-  // data.
-  proxy_to_transport_ = stats.proxy_to_transport;
-
-  for (const auto& transport_iter : stats.transport_stats) {
-    // Attempt to get a copy of the certificates from the transport and
-    // expose them in stats reports.  All channels in a transport share the
-    // same local and remote certificates.
-    //
-    StatsReport::Id local_cert_report_id, remote_cert_report_id;
-    rtc::scoped_refptr<rtc::RTCCertificate> certificate;
-    if (pc_->session()->GetLocalCertificate(
-            transport_iter.second.transport_name, &certificate)) {
-      StatsReport* r = AddCertificateReports(&(certificate->ssl_certificate()));
-      if (r)
-        local_cert_report_id = r->id();
-    }
-
-    rtc::scoped_ptr<rtc::SSLCertificate> cert;
-    if (pc_->session()->GetRemoteSSLCertificate(
-            transport_iter.second.transport_name, cert.accept())) {
-      StatsReport* r = AddCertificateReports(cert.get());
-      if (r)
-        remote_cert_report_id = r->id();
-    }
-
-    for (const auto& channel_iter : transport_iter.second.channel_stats) {
-      StatsReport::Id id(StatsReport::NewComponentId(
-          transport_iter.second.transport_name, channel_iter.component));
-      StatsReport* channel_report = reports_.ReplaceOrAddNew(id);
-      channel_report->set_timestamp(stats_gathering_started_);
-      channel_report->AddInt(StatsReport::kStatsValueNameComponent,
-                             channel_iter.component);
-      if (local_cert_report_id.get()) {
-        channel_report->AddId(StatsReport::kStatsValueNameLocalCertificateId,
-                              local_cert_report_id);
-      }
-      if (remote_cert_report_id.get()) {
-        channel_report->AddId(StatsReport::kStatsValueNameRemoteCertificateId,
-                              remote_cert_report_id);
-      }
-      int srtp_crypto_suite = channel_iter.srtp_crypto_suite;
-      if (srtp_crypto_suite != rtc::SRTP_INVALID_CRYPTO_SUITE &&
-          rtc::SrtpCryptoSuiteToName(srtp_crypto_suite).length()) {
-        channel_report->AddString(
-            StatsReport::kStatsValueNameSrtpCipher,
-            rtc::SrtpCryptoSuiteToName(srtp_crypto_suite));
-      }
-      int ssl_cipher_suite = channel_iter.ssl_cipher_suite;
-      if (ssl_cipher_suite != rtc::TLS_NULL_WITH_NULL_NULL &&
-          rtc::SSLStreamAdapter::SslCipherSuiteToName(ssl_cipher_suite)
-              .length()) {
-        channel_report->AddString(
-            StatsReport::kStatsValueNameDtlsCipher,
-            rtc::SSLStreamAdapter::SslCipherSuiteToName(ssl_cipher_suite));
-      }
-
-      int connection_id = 0;
-      for (const cricket::ConnectionInfo& info :
-               channel_iter.connection_infos) {
-        StatsReport* connection_report = AddConnectionInfoReport(
-            transport_iter.first, channel_iter.component, connection_id++,
-            channel_report->id(), info);
-        if (info.best_connection) {
-          channel_report->AddId(
-              StatsReport::kStatsValueNameSelectedCandidatePairId,
-              connection_report->id());
-        }
-      }
-    }
-  }
-}
-
-void StatsCollector::ExtractVoiceInfo() {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-
-  if (!pc_->session()->voice_channel()) {
-    return;
-  }
-  cricket::VoiceMediaInfo voice_info;
-  if (!pc_->session()->voice_channel()->GetStats(&voice_info)) {
-    LOG(LS_ERROR) << "Failed to get voice channel stats.";
-    return;
-  }
-
-  // TODO(tommi): The above code should run on the worker thread and post the
-  // results back to the signaling thread, where we can add data to the reports.
-  rtc::Thread::ScopedDisallowBlockingCalls no_blocking_calls;
-
-  StatsReport::Id transport_id(GetTransportIdFromProxy(
-      proxy_to_transport_, pc_->session()->voice_channel()->content_name()));
-  if (!transport_id.get()) {
-    LOG(LS_ERROR) << "Failed to get transport name for proxy "
-                  << pc_->session()->voice_channel()->content_name();
-    return;
-  }
-
-  ExtractStatsFromList(voice_info.receivers, transport_id, this,
-      StatsReport::kReceive);
-  ExtractStatsFromList(voice_info.senders, transport_id, this,
-      StatsReport::kSend);
-
-  UpdateStatsFromExistingLocalAudioTracks();
-}
-
-void StatsCollector::ExtractVideoInfo(
-    PeerConnectionInterface::StatsOutputLevel level) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-
-  if (!pc_->session()->video_channel())
-    return;
-
-  cricket::VideoMediaInfo video_info;
-  if (!pc_->session()->video_channel()->GetStats(&video_info)) {
-    LOG(LS_ERROR) << "Failed to get video channel stats.";
-    return;
-  }
-
-  // TODO(tommi): The above code should run on the worker thread and post the
-  // results back to the signaling thread, where we can add data to the reports.
-  rtc::Thread::ScopedDisallowBlockingCalls no_blocking_calls;
-
-  StatsReport::Id transport_id(GetTransportIdFromProxy(
-      proxy_to_transport_, pc_->session()->video_channel()->content_name()));
-  if (!transport_id.get()) {
-    LOG(LS_ERROR) << "Failed to get transport name for proxy "
-                  << pc_->session()->video_channel()->content_name();
-    return;
-  }
-  ExtractStatsFromList(video_info.receivers, transport_id, this,
-      StatsReport::kReceive);
-  ExtractStatsFromList(video_info.senders, transport_id, this,
-      StatsReport::kSend);
-  if (video_info.bw_estimations.size() != 1) {
-    LOG(LS_ERROR) << "BWEs count: " << video_info.bw_estimations.size();
-  } else {
-    StatsReport::Id report_id(StatsReport::NewBandwidthEstimationId());
-    StatsReport* report = reports_.FindOrAddNew(report_id);
-    ExtractStats(
-        video_info.bw_estimations[0], stats_gathering_started_, level, report);
-  }
-}
-
-void StatsCollector::ExtractDataInfo() {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-
-  rtc::Thread::ScopedDisallowBlockingCalls no_blocking_calls;
-
-  for (const auto& dc : pc_->sctp_data_channels()) {
-    StatsReport::Id id(StatsReport::NewTypedIntId(
-        StatsReport::kStatsReportTypeDataChannel, dc->id()));
-    StatsReport* report = reports_.ReplaceOrAddNew(id);
-    report->set_timestamp(stats_gathering_started_);
-    report->AddString(StatsReport::kStatsValueNameLabel, dc->label());
-    report->AddInt(StatsReport::kStatsValueNameDataChannelId, dc->id());
-    report->AddString(StatsReport::kStatsValueNameProtocol, dc->protocol());
-    report->AddString(StatsReport::kStatsValueNameState,
-                      DataChannelInterface::DataStateString(dc->state()));
-  }
-}
-
-StatsReport* StatsCollector::GetReport(const StatsReport::StatsType& type,
-                                       const std::string& id,
-                                       StatsReport::Direction direction) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  RTC_DCHECK(type == StatsReport::kStatsReportTypeSsrc ||
-             type == StatsReport::kStatsReportTypeRemoteSsrc);
-  return reports_.Find(StatsReport::NewIdWithDirection(type, id, direction));
-}
-
-void StatsCollector::UpdateStatsFromExistingLocalAudioTracks() {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  // Loop through the existing local audio tracks.
-  for (const auto& it : local_audio_tracks_) {
-    AudioTrackInterface* track = it.first;
-    uint32_t ssrc = it.second;
-    StatsReport* report =
-        GetReport(StatsReport::kStatsReportTypeSsrc,
-                  rtc::ToString<uint32_t>(ssrc), StatsReport::kSend);
-    if (report == NULL) {
-      // This can happen if a local audio track is added to a stream on the
-      // fly and the report has not been set up yet. Do nothing in this case.
-      LOG(LS_ERROR) << "Stats report does not exist for ssrc " << ssrc;
-      continue;
-    }
-
-    // The same ssrc can be used by both local and remote audio tracks.
-    const StatsReport::Value* v =
-        report->FindValue(StatsReport::kStatsValueNameTrackId);
-    if (!v || v->string_val() != track->id())
-      continue;
-
-    report->set_timestamp(stats_gathering_started_);
-    UpdateReportFromAudioTrack(track, report);
-  }
-}
-
-void StatsCollector::UpdateReportFromAudioTrack(AudioTrackInterface* track,
-                                                StatsReport* report) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  RTC_DCHECK(track != NULL);
-
-  // Don't overwrite report values if they're not available.
-  int signal_level;
-  if (track->GetSignalLevel(&signal_level)) {
-    RTC_DCHECK_GE(signal_level, 0);
-    report->AddInt(StatsReport::kStatsValueNameAudioInputLevel, signal_level);
-  }
-
-  auto audio_processor(track->GetAudioProcessor());
-
-  if (audio_processor.get()) {
-    AudioProcessorInterface::AudioProcessorStats stats;
-    audio_processor->GetStats(&stats);
-
-    SetAudioProcessingStats(
-        report, stats.typing_noise_detected, stats.echo_return_loss,
-        stats.echo_return_loss_enhancement, stats.echo_delay_median_ms,
-        stats.aec_quality_min, stats.echo_delay_std_ms);
-  }
-}
-
-bool StatsCollector::GetTrackIdBySsrc(uint32_t ssrc,
-                                      std::string* track_id,
-                                      StatsReport::Direction direction) {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-  if (direction == StatsReport::kSend) {
-    if (!pc_->session()->GetLocalTrackIdBySsrc(ssrc, track_id)) {
-      LOG(LS_WARNING) << "The SSRC " << ssrc
-                      << " is not associated with a sending track";
-      return false;
-    }
-  } else {
-    RTC_DCHECK(direction == StatsReport::kReceive);
-    if (!pc_->session()->GetRemoteTrackIdBySsrc(ssrc, track_id)) {
-      LOG(LS_WARNING) << "The SSRC " << ssrc
-                      << " is not associated with a receiving track";
-      return false;
-    }
-  }
-
-  return true;
-}
-
-void StatsCollector::UpdateTrackReports() {
-  RTC_DCHECK(pc_->session()->signaling_thread()->IsCurrent());
-
-  rtc::Thread::ScopedDisallowBlockingCalls no_blocking_calls;
-
-  for (const auto& entry : track_ids_) {
-    StatsReport* report = entry.second;
-    report->set_timestamp(stats_gathering_started_);
-  }
-}
-
-void StatsCollector::ClearUpdateStatsCacheForTest() {
-  stats_gathering_started_ = 0;
-}
-
-}  // namespace webrtc