pc/test/fakepeerconnectionforstats.h - src - Git at Google

 /*
  *  Copyright 2018 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.
  */

 #ifndef PC_TEST_FAKEPEERCONNECTIONFORSTATS_H_
 #define PC_TEST_FAKEPEERCONNECTIONFORSTATS_H_

 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>

 #include "media/base/fakemediaengine.h"
 #include "pc/streamcollection.h"
 #include "pc/test/fakedatachannelprovider.h"
 #include "pc/test/fakepeerconnectionbase.h"

 namespace webrtc {

 // Fake VoiceMediaChannel where the result of GetStats can be configured.
 class FakeVoiceMediaChannelForStats : public cricket::FakeVoiceMediaChannel {
  public:
   FakeVoiceMediaChannelForStats()
       : cricket::FakeVoiceMediaChannel(nullptr, cricket::AudioOptions()) {}

   void SetStats(const cricket::VoiceMediaInfo& voice_info) {
     stats_ = voice_info;
   }

   // VoiceMediaChannel overrides.
   bool GetStats(cricket::VoiceMediaInfo* info) override {
     if (stats_) {
       *info = *stats_;
       return true;
     }
     return false;
   }

  private:
   absl::optional<cricket::VoiceMediaInfo> stats_;
 };

 // Fake VideoMediaChannel where the result of GetStats can be configured.
 class FakeVideoMediaChannelForStats : public cricket::FakeVideoMediaChannel {
  public:
   FakeVideoMediaChannelForStats()
       : cricket::FakeVideoMediaChannel(nullptr, cricket::VideoOptions()) {}

   void SetStats(const cricket::VideoMediaInfo& video_info) {
     stats_ = video_info;
   }

   // VideoMediaChannel overrides.
   bool GetStats(cricket::VideoMediaInfo* info) override {
     if (stats_) {
       *info = *stats_;
       return true;
     }
     return false;
   }

  private:
   absl::optional<cricket::VideoMediaInfo> stats_;
 };

 constexpr bool kDefaultRtcpMuxRequired = true;
 constexpr bool kDefaultSrtpRequired = true;

 // This class is intended to be fed into the StatsCollector and
 // RTCStatsCollector so that the stats functionality can be unit tested.
 // Individual tests can configure this fake as needed to simulate scenarios
 // under which to test the stats collectors.
 class FakePeerConnectionForStats : public FakePeerConnectionBase {
  public:
   // TODO(steveanton): Add support for specifying separate threads to test
   // multi-threading correctness.
   FakePeerConnectionForStats()
       : network_thread_(rtc::Thread::Current()),
         worker_thread_(rtc::Thread::Current()),
         signaling_thread_(rtc::Thread::Current()),
         local_streams_(StreamCollection::Create()),
         remote_streams_(StreamCollection::Create()) {}

   rtc::scoped_refptr<StreamCollection> mutable_local_streams() {
     return local_streams_;
   }

   rtc::scoped_refptr<StreamCollection> mutable_remote_streams() {
     return remote_streams_;
   }

   void AddSender(rtc::scoped_refptr<RtpSenderInternal> sender) {
     // TODO(steveanton): Switch tests to use RtpTransceivers directly.
     auto sender_proxy = RtpSenderProxyWithInternal<RtpSenderInternal>::Create(
         signaling_thread_, sender);
     GetOrCreateFirstTransceiverOfType(sender->media_type())
         ->internal()
         ->AddSender(sender_proxy);
   }

   void AddReceiver(rtc::scoped_refptr<RtpReceiverInternal> receiver) {
     // TODO(steveanton): Switch tests to use RtpTransceivers directly.
     auto receiver_proxy =
         RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create(
             signaling_thread_, receiver);
     GetOrCreateFirstTransceiverOfType(receiver->media_type())
         ->internal()
         ->AddReceiver(receiver_proxy);
   }

   FakeVoiceMediaChannelForStats* AddVoiceChannel(
       const std::string& mid,
       const std::string& transport_name) {
     RTC_DCHECK(!voice_channel_);
     auto voice_media_channel =
         absl::make_unique<FakeVoiceMediaChannelForStats>();
     auto* voice_media_channel_ptr = voice_media_channel.get();
     voice_channel_ = absl::make_unique<cricket::VoiceChannel>(
         worker_thread_, network_thread_, signaling_thread_, nullptr,
         std::move(voice_media_channel), mid, kDefaultSrtpRequired,
         webrtc::CryptoOptions());
     voice_channel_->set_transport_name_for_testing(transport_name);
     GetOrCreateFirstTransceiverOfType(cricket::MEDIA_TYPE_AUDIO)
         ->internal()
         ->SetChannel(voice_channel_.get());
     return voice_media_channel_ptr;
   }

   FakeVideoMediaChannelForStats* AddVideoChannel(
       const std::string& mid,
       const std::string& transport_name) {
     RTC_DCHECK(!video_channel_);
     auto video_media_channel =
         absl::make_unique<FakeVideoMediaChannelForStats>();
     auto video_media_channel_ptr = video_media_channel.get();
     video_channel_ = absl::make_unique<cricket::VideoChannel>(
         worker_thread_, network_thread_, signaling_thread_,
         std::move(video_media_channel), mid, kDefaultSrtpRequired,
         webrtc::CryptoOptions());
     video_channel_->set_transport_name_for_testing(transport_name);
     GetOrCreateFirstTransceiverOfType(cricket::MEDIA_TYPE_VIDEO)
         ->internal()
         ->SetChannel(video_channel_.get());
     return video_media_channel_ptr;
   }

   void AddLocalTrack(uint32_t ssrc, const std::string& track_id) {
     local_track_id_by_ssrc_[ssrc] = track_id;
   }

   void AddRemoteTrack(uint32_t ssrc, const std::string& track_id) {
     remote_track_id_by_ssrc_[ssrc] = track_id;
   }

   void AddSctpDataChannel(const std::string& label) {
     AddSctpDataChannel(label, InternalDataChannelInit());
   }

   void AddSctpDataChannel(const std::string& label,
                           const InternalDataChannelInit& init) {
     AddSctpDataChannel(DataChannel::Create(&data_channel_provider_,
                                            cricket::DCT_SCTP, label, init));
   }

   void AddSctpDataChannel(rtc::scoped_refptr<DataChannel> data_channel) {
     sctp_data_channels_.push_back(data_channel);
   }

   void SetTransportStats(const std::string& transport_name,
                          const cricket::TransportChannelStats& channel_stats) {
     SetTransportStats(
         transport_name,
         std::vector<cricket::TransportChannelStats>{channel_stats});
   }

   void SetTransportStats(
       const std::string& transport_name,
       const std::vector<cricket::TransportChannelStats>& channel_stats_list) {
     cricket::TransportStats transport_stats;
     transport_stats.transport_name = transport_name;
     transport_stats.channel_stats = channel_stats_list;
     transport_stats_by_name_[transport_name] = transport_stats;
   }

   void SetCallStats(const Call::Stats& call_stats) { call_stats_ = call_stats; }

   void SetLocalCertificate(
       const std::string& transport_name,
       rtc::scoped_refptr<rtc::RTCCertificate> certificate) {
     local_certificates_by_transport_[transport_name] = certificate;
   }

   void SetRemoteCertChain(const std::string& transport_name,
                           std::unique_ptr<rtc::SSLCertChain> chain) {
     remote_cert_chains_by_transport_[transport_name] = std::move(chain);
   }

   // PeerConnectionInterface overrides.

   rtc::scoped_refptr<StreamCollectionInterface> local_streams() override {
     return local_streams_;
   }

   rtc::scoped_refptr<StreamCollectionInterface> remote_streams() override {
     return remote_streams_;
   }

   std::vector<rtc::scoped_refptr<RtpSenderInterface>> GetSenders()
       const override {
     std::vector<rtc::scoped_refptr<RtpSenderInterface>> senders;
     for (auto transceiver : transceivers_) {
       for (auto sender : transceiver->internal()->senders()) {
         senders.push_back(sender);
       }
     }
     return senders;
   }

   std::vector<rtc::scoped_refptr<RtpReceiverInterface>> GetReceivers()
       const override {
     std::vector<rtc::scoped_refptr<RtpReceiverInterface>> receivers;
     for (auto transceiver : transceivers_) {
       for (auto receiver : transceiver->internal()->receivers()) {
         receivers.push_back(receiver);
       }
     }
     return receivers;
   }

   // PeerConnectionInternal overrides.

   rtc::Thread* network_thread() const override { return network_thread_; }

   rtc::Thread* worker_thread() const override { return worker_thread_; }

   rtc::Thread* signaling_thread() const override { return signaling_thread_; }

   std::vector<
       rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
   GetTransceiversInternal() const override {
     return transceivers_;
   }

   bool GetLocalTrackIdBySsrc(uint32_t ssrc, std::string* track_id) override {
     auto it = local_track_id_by_ssrc_.find(ssrc);
     if (it != local_track_id_by_ssrc_.end()) {
       *track_id = it->second;
       return true;
     } else {
       return false;
     }
   }

   bool GetRemoteTrackIdBySsrc(uint32_t ssrc, std::string* track_id) override {
     auto it = remote_track_id_by_ssrc_.find(ssrc);
     if (it != remote_track_id_by_ssrc_.end()) {
       *track_id = it->second;
       return true;
     } else {
       return false;
     }
   }

   std::vector<rtc::scoped_refptr<DataChannel>> sctp_data_channels()
       const override {
     return sctp_data_channels_;
   }

   cricket::CandidateStatsList GetPooledCandidateStats() const override {
     return {};
   }

   std::map<std::string, std::string> GetTransportNamesByMid() const override {
     std::map<std::string, std::string> transport_names_by_mid;
     if (voice_channel_) {
       transport_names_by_mid[voice_channel_->content_name()] =
           voice_channel_->transport_name();
     }
     if (video_channel_) {
       transport_names_by_mid[video_channel_->content_name()] =
           video_channel_->transport_name();
     }
     return transport_names_by_mid;
   }

   std::map<std::string, cricket::TransportStats> GetTransportStatsByNames(
       const std::set<std::string>& transport_names) override {
     std::map<std::string, cricket::TransportStats> transport_stats_by_name;
     for (const std::string& transport_name : transport_names) {
       transport_stats_by_name[transport_name] =
           GetTransportStatsByName(transport_name);
     }
     return transport_stats_by_name;
   }

   Call::Stats GetCallStats() override { return call_stats_; }

   bool GetLocalCertificate(
       const std::string& transport_name,
       rtc::scoped_refptr<rtc::RTCCertificate>* certificate) override {
     auto it = local_certificates_by_transport_.find(transport_name);
     if (it != local_certificates_by_transport_.end()) {
       *certificate = it->second;
       return true;
     } else {
       return false;
     }
   }

   std::unique_ptr<rtc::SSLCertChain> GetRemoteSSLCertChain(
       const std::string& transport_name) override {
     auto it = remote_cert_chains_by_transport_.find(transport_name);
     if (it != remote_cert_chains_by_transport_.end()) {
       return it->second->Clone();
     } else {
       return nullptr;
     }
   }

  private:
   cricket::TransportStats GetTransportStatsByName(
       const std::string& transport_name) {
     auto it = transport_stats_by_name_.find(transport_name);
     if (it != transport_stats_by_name_.end()) {
       // If specific transport stats have been specified, return those.
       return it->second;
     }
     // Otherwise, generate some dummy stats.
     cricket::TransportChannelStats channel_stats;
     channel_stats.component = cricket::ICE_CANDIDATE_COMPONENT_RTP;
     cricket::TransportStats transport_stats;
     transport_stats.transport_name = transport_name;
     transport_stats.channel_stats.push_back(channel_stats);
     return transport_stats;
   }

   rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
   GetOrCreateFirstTransceiverOfType(cricket::MediaType media_type) {
     for (auto transceiver : transceivers_) {
       if (transceiver->internal()->media_type() == media_type) {
         return transceiver;
       }
     }
     auto transceiver = RtpTransceiverProxyWithInternal<RtpTransceiver>::Create(
         signaling_thread_, new RtpTransceiver(media_type));
     transceivers_.push_back(transceiver);
     return transceiver;
   }

   rtc::Thread* const network_thread_;
   rtc::Thread* const worker_thread_;
   rtc::Thread* const signaling_thread_;

   rtc::scoped_refptr<StreamCollection> local_streams_;
   rtc::scoped_refptr<StreamCollection> remote_streams_;

   std::vector<
       rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
       transceivers_;

   FakeDataChannelProvider data_channel_provider_;

   std::unique_ptr<cricket::VoiceChannel> voice_channel_;
   std::unique_ptr<cricket::VideoChannel> video_channel_;
   std::map<uint32_t, std::string> local_track_id_by_ssrc_;
   std::map<uint32_t, std::string> remote_track_id_by_ssrc_;

   std::vector<rtc::scoped_refptr<DataChannel>> sctp_data_channels_;

   std::map<std::string, cricket::TransportStats> transport_stats_by_name_;

   Call::Stats call_stats_;

   std::map<std::string, rtc::scoped_refptr<rtc::RTCCertificate>>
       local_certificates_by_transport_;
   std::map<std::string, std::unique_ptr<rtc::SSLCertChain>>
       remote_cert_chains_by_transport_;
 };

 }  // namespace webrtc

 #endif  // PC_TEST_FAKEPEERCONNECTIONFORSTATS_H_
	/*
	* Copyright 2018 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.
	*/

	#ifndef PC_TEST_FAKEPEERCONNECTIONFORSTATS_H_
	#define PC_TEST_FAKEPEERCONNECTIONFORSTATS_H_

	#include <map>
	#include <memory>
	#include <set>
	#include <string>
	#include <utility>
	#include <vector>

	#include "media/base/fakemediaengine.h"
	#include "pc/streamcollection.h"
	#include "pc/test/fakedatachannelprovider.h"
	#include "pc/test/fakepeerconnectionbase.h"

	namespace webrtc {

	// Fake VoiceMediaChannel where the result of GetStats can be configured.
	class FakeVoiceMediaChannelForStats : public cricket::FakeVoiceMediaChannel {
	public:
	FakeVoiceMediaChannelForStats()
	: cricket::FakeVoiceMediaChannel(nullptr, cricket::AudioOptions()) {}

	void SetStats(const cricket::VoiceMediaInfo& voice_info) {
	stats_ = voice_info;
	}

	// VoiceMediaChannel overrides.
	bool GetStats(cricket::VoiceMediaInfo* info) override {
	if (stats_) {
	info = stats_;
	return true;
	}
	return false;
	}

	private:
	absl::optional<cricket::VoiceMediaInfo> stats_;
	};

	// Fake VideoMediaChannel where the result of GetStats can be configured.
	class FakeVideoMediaChannelForStats : public cricket::FakeVideoMediaChannel {
	public:
	FakeVideoMediaChannelForStats()
	: cricket::FakeVideoMediaChannel(nullptr, cricket::VideoOptions()) {}

	void SetStats(const cricket::VideoMediaInfo& video_info) {
	stats_ = video_info;
	}

	// VideoMediaChannel overrides.
	bool GetStats(cricket::VideoMediaInfo* info) override {
	if (stats_) {
	info = stats_;
	return true;
	}
	return false;
	}

	private:
	absl::optional<cricket::VideoMediaInfo> stats_;
	};

	constexpr bool kDefaultRtcpMuxRequired = true;
	constexpr bool kDefaultSrtpRequired = true;

	// This class is intended to be fed into the StatsCollector and
	// RTCStatsCollector so that the stats functionality can be unit tested.
	// Individual tests can configure this fake as needed to simulate scenarios
	// under which to test the stats collectors.
	class FakePeerConnectionForStats : public FakePeerConnectionBase {
	public:
	// TODO(steveanton): Add support for specifying separate threads to test
	// multi-threading correctness.
	FakePeerConnectionForStats()
	: network_thread_(rtc::Thread::Current()),
	worker_thread_(rtc::Thread::Current()),
	signaling_thread_(rtc::Thread::Current()),
	local_streams_(StreamCollection::Create()),
	remote_streams_(StreamCollection::Create()) {}

	rtc::scoped_refptr<StreamCollection> mutable_local_streams() {
	return local_streams_;
	}

	rtc::scoped_refptr<StreamCollection> mutable_remote_streams() {
	return remote_streams_;
	}

	void AddSender(rtc::scoped_refptr<RtpSenderInternal> sender) {
	// TODO(steveanton): Switch tests to use RtpTransceivers directly.
	auto sender_proxy = RtpSenderProxyWithInternal<RtpSenderInternal>::Create(
	signaling_thread_, sender);
	GetOrCreateFirstTransceiverOfType(sender->media_type())
	->internal()
	->AddSender(sender_proxy);
	}

	void AddReceiver(rtc::scoped_refptr<RtpReceiverInternal> receiver) {
	// TODO(steveanton): Switch tests to use RtpTransceivers directly.
	auto receiver_proxy =
	RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create(
	signaling_thread_, receiver);
	GetOrCreateFirstTransceiverOfType(receiver->media_type())
	->internal()
	->AddReceiver(receiver_proxy);
	}

	FakeVoiceMediaChannelForStats* AddVoiceChannel(
	const std::string& mid,
	const std::string& transport_name) {
	RTC_DCHECK(!voice_channel_);
	auto voice_media_channel =
	absl::make_unique<FakeVoiceMediaChannelForStats>();
	auto* voice_media_channel_ptr = voice_media_channel.get();
	voice_channel_ = absl::make_unique<cricket::VoiceChannel>(
	worker_thread_, network_thread_, signaling_thread_, nullptr,
	std::move(voice_media_channel), mid, kDefaultSrtpRequired,
	webrtc::CryptoOptions());
	voice_channel_->set_transport_name_for_testing(transport_name);
	GetOrCreateFirstTransceiverOfType(cricket::MEDIA_TYPE_AUDIO)
	->internal()
	->SetChannel(voice_channel_.get());
	return voice_media_channel_ptr;
	}

	FakeVideoMediaChannelForStats* AddVideoChannel(
	const std::string& mid,
	const std::string& transport_name) {
	RTC_DCHECK(!video_channel_);
	auto video_media_channel =
	absl::make_unique<FakeVideoMediaChannelForStats>();
	auto video_media_channel_ptr = video_media_channel.get();
	video_channel_ = absl::make_unique<cricket::VideoChannel>(
	worker_thread_, network_thread_, signaling_thread_,
	std::move(video_media_channel), mid, kDefaultSrtpRequired,
	webrtc::CryptoOptions());
	video_channel_->set_transport_name_for_testing(transport_name);
	GetOrCreateFirstTransceiverOfType(cricket::MEDIA_TYPE_VIDEO)
	->internal()
	->SetChannel(video_channel_.get());
	return video_media_channel_ptr;
	}

	void AddLocalTrack(uint32_t ssrc, const std::string& track_id) {
	local_track_id_by_ssrc_[ssrc] = track_id;
	}

	void AddRemoteTrack(uint32_t ssrc, const std::string& track_id) {
	remote_track_id_by_ssrc_[ssrc] = track_id;
	}

	void AddSctpDataChannel(const std::string& label) {
	AddSctpDataChannel(label, InternalDataChannelInit());
	}

	void AddSctpDataChannel(const std::string& label,
	const InternalDataChannelInit& init) {
	AddSctpDataChannel(DataChannel::Create(&data_channel_provider_,
	cricket::DCT_SCTP, label, init));
	}

	void AddSctpDataChannel(rtc::scoped_refptr<DataChannel> data_channel) {
	sctp_data_channels_.push_back(data_channel);
	}

	void SetTransportStats(const std::string& transport_name,
	const cricket::TransportChannelStats& channel_stats) {
	SetTransportStats(
	transport_name,
	std::vector<cricket::TransportChannelStats>{channel_stats});
	}

	void SetTransportStats(
	const std::string& transport_name,
	const std::vector<cricket::TransportChannelStats>& channel_stats_list) {
	cricket::TransportStats transport_stats;
	transport_stats.transport_name = transport_name;
	transport_stats.channel_stats = channel_stats_list;
	transport_stats_by_name_[transport_name] = transport_stats;
	}

	void SetCallStats(const Call::Stats& call_stats) { call_stats_ = call_stats; }

	void SetLocalCertificate(
	const std::string& transport_name,
	rtc::scoped_refptr<rtc::RTCCertificate> certificate) {
	local_certificates_by_transport_[transport_name] = certificate;
	}

	void SetRemoteCertChain(const std::string& transport_name,
	std::unique_ptr<rtc::SSLCertChain> chain) {
	remote_cert_chains_by_transport_[transport_name] = std::move(chain);
	}

	// PeerConnectionInterface overrides.

	rtc::scoped_refptr<StreamCollectionInterface> local_streams() override {
	return local_streams_;
	}

	rtc::scoped_refptr<StreamCollectionInterface> remote_streams() override {
	return remote_streams_;
	}

	std::vector<rtc::scoped_refptr<RtpSenderInterface>> GetSenders()
	const override {
	std::vector<rtc::scoped_refptr<RtpSenderInterface>> senders;
	for (auto transceiver : transceivers_) {
	for (auto sender : transceiver->internal()->senders()) {
	senders.push_back(sender);
	}
	}
	return senders;
	}

	std::vector<rtc::scoped_refptr<RtpReceiverInterface>> GetReceivers()
	const override {
	std::vector<rtc::scoped_refptr<RtpReceiverInterface>> receivers;
	for (auto transceiver : transceivers_) {
	for (auto receiver : transceiver->internal()->receivers()) {
	receivers.push_back(receiver);
	}
	}
	return receivers;
	}

	// PeerConnectionInternal overrides.

	rtc::Thread* network_thread() const override { return network_thread_; }

	rtc::Thread* worker_thread() const override { return worker_thread_; }

	rtc::Thread* signaling_thread() const override { return signaling_thread_; }

	std::vector<
	rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
	GetTransceiversInternal() const override {
	return transceivers_;
	}

	bool GetLocalTrackIdBySsrc(uint32_t ssrc, std::string* track_id) override {
	auto it = local_track_id_by_ssrc_.find(ssrc);
	if (it != local_track_id_by_ssrc_.end()) {
	*track_id = it->second;
	return true;
	} else {
	return false;
	}
	}

	bool GetRemoteTrackIdBySsrc(uint32_t ssrc, std::string* track_id) override {
	auto it = remote_track_id_by_ssrc_.find(ssrc);
	if (it != remote_track_id_by_ssrc_.end()) {
	*track_id = it->second;
	return true;
	} else {
	return false;
	}
	}

	std::vector<rtc::scoped_refptr<DataChannel>> sctp_data_channels()
	const override {
	return sctp_data_channels_;
	}

	cricket::CandidateStatsList GetPooledCandidateStats() const override {
	return {};
	}

	std::map<std::string, std::string> GetTransportNamesByMid() const override {
	std::map<std::string, std::string> transport_names_by_mid;
	if (voice_channel_) {
	transport_names_by_mid[voice_channel_->content_name()] =
	voice_channel_->transport_name();
	}
	if (video_channel_) {
	transport_names_by_mid[video_channel_->content_name()] =
	video_channel_->transport_name();
	}
	return transport_names_by_mid;
	}

	std::map<std::string, cricket::TransportStats> GetTransportStatsByNames(
	const std::set<std::string>& transport_names) override {
	std::map<std::string, cricket::TransportStats> transport_stats_by_name;
	for (const std::string& transport_name : transport_names) {
	transport_stats_by_name[transport_name] =
	GetTransportStatsByName(transport_name);
	}
	return transport_stats_by_name;
	}

	Call::Stats GetCallStats() override { return call_stats_; }

	bool GetLocalCertificate(
	const std::string& transport_name,
	rtc::scoped_refptr<rtc::RTCCertificate>* certificate) override {
	auto it = local_certificates_by_transport_.find(transport_name);
	if (it != local_certificates_by_transport_.end()) {
	*certificate = it->second;
	return true;
	} else {
	return false;
	}
	}

	std::unique_ptr<rtc::SSLCertChain> GetRemoteSSLCertChain(
	const std::string& transport_name) override {
	auto it = remote_cert_chains_by_transport_.find(transport_name);
	if (it != remote_cert_chains_by_transport_.end()) {
	return it->second->Clone();
	} else {
	return nullptr;
	}
	}

	private:
	cricket::TransportStats GetTransportStatsByName(
	const std::string& transport_name) {
	auto it = transport_stats_by_name_.find(transport_name);
	if (it != transport_stats_by_name_.end()) {
	// If specific transport stats have been specified, return those.
	return it->second;
	}
	// Otherwise, generate some dummy stats.
	cricket::TransportChannelStats channel_stats;
	channel_stats.component = cricket::ICE_CANDIDATE_COMPONENT_RTP;
	cricket::TransportStats transport_stats;
	transport_stats.transport_name = transport_name;
	transport_stats.channel_stats.push_back(channel_stats);
	return transport_stats;
	}

	rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
	GetOrCreateFirstTransceiverOfType(cricket::MediaType media_type) {
	for (auto transceiver : transceivers_) {
	if (transceiver->internal()->media_type() == media_type) {
	return transceiver;
	}
	}
	auto transceiver = RtpTransceiverProxyWithInternal<RtpTransceiver>::Create(
	signaling_thread_, new RtpTransceiver(media_type));
	transceivers_.push_back(transceiver);
	return transceiver;
	}

	rtc::Thread* const network_thread_;
	rtc::Thread* const worker_thread_;
	rtc::Thread* const signaling_thread_;

	rtc::scoped_refptr<StreamCollection> local_streams_;
	rtc::scoped_refptr<StreamCollection> remote_streams_;

	std::vector<
	rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
	transceivers_;

	FakeDataChannelProvider data_channel_provider_;

	std::unique_ptr<cricket::VoiceChannel> voice_channel_;
	std::unique_ptr<cricket::VideoChannel> video_channel_;
	std::map<uint32_t, std::string> local_track_id_by_ssrc_;
	std::map<uint32_t, std::string> remote_track_id_by_ssrc_;

	std::vector<rtc::scoped_refptr<DataChannel>> sctp_data_channels_;

	std::map<std::string, cricket::TransportStats> transport_stats_by_name_;

	Call::Stats call_stats_;

	std::map<std::string, rtc::scoped_refptr<rtc::RTCCertificate>>
	local_certificates_by_transport_;
	std::map<std::string, std::unique_ptr<rtc::SSLCertChain>>
	remote_cert_chains_by_transport_;
	};

	} // namespace webrtc

	#endif // PC_TEST_FAKEPEERCONNECTIONFORSTATS_H_