pc/trackmediainfomap_unittest.cc - src/webrtc - Git at Google

 /*
  *  Copyright 2016 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/pc/trackmediainfomap.h"

 #include <initializer_list>
 #include <memory>
 #include <utility>
 #include <vector>

 #include "webrtc/api/rtpreceiverinterface.h"
 #include "webrtc/api/rtpsenderinterface.h"
 #include "webrtc/api/test/mock_rtpreceiver.h"
 #include "webrtc/api/test/mock_rtpsender.h"
 #include "webrtc/media/base/mediachannel.h"
 #include "webrtc/pc/audiotrack.h"
 #include "webrtc/pc/test/fakevideotracksource.h"
 #include "webrtc/pc/videotrack.h"
 #include "webrtc/rtc_base/refcount.h"
 #include "webrtc/test/gtest.h"

 namespace webrtc {

 namespace {

 RtpParameters CreateRtpParametersWithSsrcs(
     std::initializer_list<uint32_t> ssrcs) {
   RtpParameters params;
   for (uint32_t ssrc : ssrcs) {
     RtpEncodingParameters encoding_params;
     encoding_params.ssrc = rtc::Optional<uint32_t>(ssrc);
     params.encodings.push_back(encoding_params);
   }
   return params;
 }

 rtc::scoped_refptr<MockRtpSender> CreateMockRtpSender(
     cricket::MediaType media_type,
     std::initializer_list<uint32_t> ssrcs,
     rtc::scoped_refptr<MediaStreamTrackInterface> track) {
   uint32_t first_ssrc;
   if (ssrcs.size()) {
     first_ssrc = *ssrcs.begin();
   } else {
     first_ssrc = 0;
   }
   rtc::scoped_refptr<MockRtpSender> sender(
       new rtc::RefCountedObject<MockRtpSender>());
   EXPECT_CALL(*sender, track()).WillRepeatedly(testing::Return(track));
   EXPECT_CALL(*sender, ssrc()).WillRepeatedly(testing::Return(first_ssrc));
   EXPECT_CALL(*sender, media_type())
       .WillRepeatedly(testing::Return(media_type));
   EXPECT_CALL(*sender, GetParameters())
       .WillRepeatedly(testing::Return(CreateRtpParametersWithSsrcs(ssrcs)));
   return sender;
 }

 rtc::scoped_refptr<MockRtpReceiver> CreateMockRtpReceiver(
     cricket::MediaType media_type,
     std::initializer_list<uint32_t> ssrcs,
     rtc::scoped_refptr<MediaStreamTrackInterface> track) {
   rtc::scoped_refptr<MockRtpReceiver> receiver(
       new rtc::RefCountedObject<MockRtpReceiver>());
   EXPECT_CALL(*receiver, track()).WillRepeatedly(testing::Return(track));
   EXPECT_CALL(*receiver, media_type())
       .WillRepeatedly(testing::Return(media_type));
   EXPECT_CALL(*receiver, GetParameters())
       .WillRepeatedly(testing::Return(CreateRtpParametersWithSsrcs(ssrcs)));
   return receiver;
 }

 class TrackMediaInfoMapTest : public testing::Test {
  public:
   TrackMediaInfoMapTest()
       : voice_media_info_(new cricket::VoiceMediaInfo()),
         video_media_info_(new cricket::VideoMediaInfo()),
         local_audio_track_(AudioTrack::Create("LocalAudioTrack", nullptr)),
         remote_audio_track_(AudioTrack::Create("RemoteAudioTrack", nullptr)),
         local_video_track_(
             VideoTrack::Create("LocalVideoTrack",
                                FakeVideoTrackSource::Create(false),
                                rtc::Thread::Current())),
         remote_video_track_(
             VideoTrack::Create("RemoteVideoTrack",
                                FakeVideoTrackSource::Create(false),
                                rtc::Thread::Current())) {}

   ~TrackMediaInfoMapTest() {
     // If we have a map the ownership has been passed to the map, only delete if
     // |CreateMap| has not been called.
     if (!map_) {
       delete voice_media_info_;
       delete video_media_info_;
     }
   }

   void AddRtpSenderWithSsrcs(std::initializer_list<uint32_t> ssrcs,
                              MediaStreamTrackInterface* local_track) {
     rtc::scoped_refptr<MockRtpSender> rtp_sender = CreateMockRtpSender(
         local_track->kind() == MediaStreamTrackInterface::kAudioKind
             ? cricket::MEDIA_TYPE_AUDIO
             : cricket::MEDIA_TYPE_VIDEO,
         ssrcs, local_track);
     rtp_senders_.push_back(rtp_sender);

     if (local_track->kind() == MediaStreamTrackInterface::kAudioKind) {
       cricket::VoiceSenderInfo voice_sender_info;
       size_t i = 0;
       for (uint32_t ssrc : ssrcs) {
         voice_sender_info.local_stats.push_back(cricket::SsrcSenderInfo());
         voice_sender_info.local_stats[i++].ssrc = ssrc;
       }
       voice_media_info_->senders.push_back(voice_sender_info);
     } else {
       cricket::VideoSenderInfo video_sender_info;
       size_t i = 0;
       for (uint32_t ssrc : ssrcs) {
         video_sender_info.local_stats.push_back(cricket::SsrcSenderInfo());
         video_sender_info.local_stats[i++].ssrc = ssrc;
       }
       video_media_info_->senders.push_back(video_sender_info);
     }
   }

   void AddRtpReceiverWithSsrcs(std::initializer_list<uint32_t> ssrcs,
                                MediaStreamTrackInterface* remote_track) {
     rtc::scoped_refptr<MockRtpReceiver> rtp_receiver = CreateMockRtpReceiver(
         remote_track->kind() == MediaStreamTrackInterface::kAudioKind
             ? cricket::MEDIA_TYPE_AUDIO
             : cricket::MEDIA_TYPE_VIDEO,
         ssrcs, remote_track);
     rtp_receivers_.push_back(rtp_receiver);

     if (remote_track->kind() == MediaStreamTrackInterface::kAudioKind) {
       cricket::VoiceReceiverInfo voice_receiver_info;
       size_t i = 0;
       for (uint32_t ssrc : ssrcs) {
         voice_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
         voice_receiver_info.local_stats[i++].ssrc = ssrc;
       }
       voice_media_info_->receivers.push_back(voice_receiver_info);
     } else {
       cricket::VideoReceiverInfo video_receiver_info;
       size_t i = 0;
       for (uint32_t ssrc : ssrcs) {
         video_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
         video_receiver_info.local_stats[i++].ssrc = ssrc;
       }
       video_media_info_->receivers.push_back(video_receiver_info);
     }
   }

   void CreateMap() {
     RTC_DCHECK(!map_);
     map_.reset(new TrackMediaInfoMap(
         std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info_),
         std::unique_ptr<cricket::VideoMediaInfo>(video_media_info_),
         rtp_senders_, rtp_receivers_));
   }

  protected:
   cricket::VoiceMediaInfo* voice_media_info_;
   cricket::VideoMediaInfo* video_media_info_;
   std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders_;
   std::vector<rtc::scoped_refptr<RtpReceiverInterface>> rtp_receivers_;
   std::unique_ptr<TrackMediaInfoMap> map_;
   rtc::scoped_refptr<AudioTrack> local_audio_track_;
   rtc::scoped_refptr<AudioTrack> remote_audio_track_;
   rtc::scoped_refptr<VideoTrack> local_video_track_;
   rtc::scoped_refptr<VideoTrack> remote_video_track_;
 };

 }  // namespace

 TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithOneSsrc) {
   AddRtpSenderWithSsrcs({1}, local_audio_track_);
   AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
   AddRtpSenderWithSsrcs({3}, local_video_track_);
   AddRtpReceiverWithSsrcs({4}, remote_video_track_);
   CreateMap();

   // Local audio track <-> RTP audio sender
   ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_EQ(
       *map_->GetVoiceSenderInfos(*local_audio_track_),
       std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
             local_audio_track_.get());

   // Remote audio track <-> RTP audio receiver
   EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
             &voice_media_info_->receivers[0]);
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
             remote_audio_track_.get());

   // Local video track <-> RTP video sender
   ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_EQ(
       *map_->GetVideoSenderInfos(*local_video_track_),
       std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
             local_video_track_.get());

   // Remote video track <-> RTP video receiver
   EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
             &video_media_info_->receivers[0]);
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
             remote_video_track_.get());
 }

 TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithMissingSsrc) {
   AddRtpSenderWithSsrcs({}, local_audio_track_);
   AddRtpSenderWithSsrcs({}, local_video_track_);
   AddRtpReceiverWithSsrcs({}, remote_audio_track_);
   AddRtpReceiverWithSsrcs({}, remote_video_track_);
   CreateMap();

   EXPECT_FALSE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_FALSE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_FALSE(map_->GetVoiceReceiverInfo(*remote_audio_track_));
   EXPECT_FALSE(map_->GetVideoReceiverInfo(*remote_video_track_));
 }

 TEST_F(TrackMediaInfoMapTest,
        SingleSenderReceiverPerTrackWithAudioAndVideoUseSameSsrc) {
   AddRtpSenderWithSsrcs({1}, local_audio_track_);
   AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
   AddRtpSenderWithSsrcs({1}, local_video_track_);
   AddRtpReceiverWithSsrcs({2}, remote_video_track_);
   CreateMap();

   // Local audio track <-> RTP audio sender
   ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_EQ(
       *map_->GetVoiceSenderInfos(*local_audio_track_),
       std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
             local_audio_track_.get());

   // Remote audio track <-> RTP audio receiver
   EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
             &voice_media_info_->receivers[0]);
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
             remote_audio_track_.get());

   // Local video track <-> RTP video sender
   ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_EQ(
       *map_->GetVideoSenderInfos(*local_video_track_),
       std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
             local_video_track_.get());

   // Remote video track <-> RTP video receiver
   EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
             &video_media_info_->receivers[0]);
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
             remote_video_track_.get());
 }

 TEST_F(TrackMediaInfoMapTest, SingleMultiSsrcSenderPerTrack) {
   AddRtpSenderWithSsrcs({1, 2}, local_audio_track_);
   AddRtpSenderWithSsrcs({3, 4}, local_video_track_);
   CreateMap();

   // Local audio track <-> RTP audio senders
   ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_EQ(
       *map_->GetVoiceSenderInfos(*local_audio_track_),
       std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
             local_audio_track_.get());

   // Local video track <-> RTP video senders
   ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_EQ(
       *map_->GetVideoSenderInfos(*local_video_track_),
       std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
             local_video_track_.get());
 }

 TEST_F(TrackMediaInfoMapTest, MultipleOneSsrcSendersPerTrack) {
   AddRtpSenderWithSsrcs({1}, local_audio_track_);
   AddRtpSenderWithSsrcs({2}, local_audio_track_);
   AddRtpSenderWithSsrcs({3}, local_video_track_);
   AddRtpSenderWithSsrcs({4}, local_video_track_);
   CreateMap();

   // Local audio track <-> RTP audio senders
   ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_EQ(
       *map_->GetVoiceSenderInfos(*local_audio_track_),
       std::vector<cricket::VoiceSenderInfo*>(
           {&voice_media_info_->senders[0], &voice_media_info_->senders[1]}));
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
             local_audio_track_.get());
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[1]),
             local_audio_track_.get());

   // Local video track <-> RTP video senders
   ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_EQ(
       *map_->GetVideoSenderInfos(*local_video_track_),
       std::vector<cricket::VideoSenderInfo*>(
           {&video_media_info_->senders[0], &video_media_info_->senders[1]}));
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
             local_video_track_.get());
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[1]),
             local_video_track_.get());
 }

 TEST_F(TrackMediaInfoMapTest, MultipleMultiSsrcSendersPerTrack) {
   AddRtpSenderWithSsrcs({1, 2}, local_audio_track_);
   AddRtpSenderWithSsrcs({3, 4}, local_audio_track_);
   AddRtpSenderWithSsrcs({5, 6}, local_video_track_);
   AddRtpSenderWithSsrcs({7, 8}, local_video_track_);
   CreateMap();

   // Local audio track <-> RTP audio senders
   ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_EQ(
       *map_->GetVoiceSenderInfos(*local_audio_track_),
       std::vector<cricket::VoiceSenderInfo*>(
           {&voice_media_info_->senders[0], &voice_media_info_->senders[1]}));
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
             local_audio_track_.get());
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[1]),
             local_audio_track_.get());

   // Local video track <-> RTP video senders
   ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_EQ(
       *map_->GetVideoSenderInfos(*local_video_track_),
       std::vector<cricket::VideoSenderInfo*>(
           {&video_media_info_->senders[0], &video_media_info_->senders[1]}));
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
             local_video_track_.get());
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[1]),
             local_video_track_.get());
 }

 // SSRCs can be reused for send and receive in loopback.
 TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithSsrcNotUnique) {
   AddRtpSenderWithSsrcs({1}, local_audio_track_);
   AddRtpReceiverWithSsrcs({1}, remote_audio_track_);
   AddRtpSenderWithSsrcs({2}, local_video_track_);
   AddRtpReceiverWithSsrcs({2}, remote_video_track_);
   CreateMap();

   // Local audio track <-> RTP audio senders
   ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
   EXPECT_EQ(
       *map_->GetVoiceSenderInfos(*local_audio_track_),
       std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
             local_audio_track_.get());

   // Remote audio track <-> RTP audio receiver
   EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
             &voice_media_info_->receivers[0]);
   EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
             remote_audio_track_.get());

   // Local video track <-> RTP video senders
   ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
   EXPECT_EQ(
       *map_->GetVideoSenderInfos(*local_video_track_),
       std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
             local_video_track_.get());

   // Remote video track <-> RTP video receiver
   EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
             &video_media_info_->receivers[0]);
   EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
             remote_video_track_.get());
 }

 // Death tests.
 // Disabled on Android because death tests misbehave on Android, see
 // base/test/gtest_util.h.
 #if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)

 class TrackMediaInfoMapDeathTest : public TrackMediaInfoMapTest {};

 TEST_F(TrackMediaInfoMapDeathTest, MultipleOneSsrcReceiversPerTrack) {
   AddRtpReceiverWithSsrcs({1}, remote_audio_track_);
   AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
   AddRtpReceiverWithSsrcs({3}, remote_video_track_);
   AddRtpReceiverWithSsrcs({4}, remote_video_track_);
   EXPECT_DEATH(CreateMap(), "");
 }

 TEST_F(TrackMediaInfoMapDeathTest, MultipleMultiSsrcReceiversPerTrack) {
   AddRtpReceiverWithSsrcs({1, 2}, remote_audio_track_);
   AddRtpReceiverWithSsrcs({3, 4}, remote_audio_track_);
   AddRtpReceiverWithSsrcs({5, 6}, remote_video_track_);
   AddRtpReceiverWithSsrcs({7, 8}, remote_video_track_);
   EXPECT_DEATH(CreateMap(), "");
 }

 #endif  // RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)

 }  // namespace webrtc
	/*
	* Copyright 2016 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/pc/trackmediainfomap.h"

	#include <initializer_list>
	#include <memory>
	#include <utility>
	#include <vector>

	#include "webrtc/api/rtpreceiverinterface.h"
	#include "webrtc/api/rtpsenderinterface.h"
	#include "webrtc/api/test/mock_rtpreceiver.h"
	#include "webrtc/api/test/mock_rtpsender.h"
	#include "webrtc/media/base/mediachannel.h"
	#include "webrtc/pc/audiotrack.h"
	#include "webrtc/pc/test/fakevideotracksource.h"
	#include "webrtc/pc/videotrack.h"
	#include "webrtc/rtc_base/refcount.h"
	#include "webrtc/test/gtest.h"

	namespace webrtc {

	namespace {

	RtpParameters CreateRtpParametersWithSsrcs(
	std::initializer_list<uint32_t> ssrcs) {
	RtpParameters params;
	for (uint32_t ssrc : ssrcs) {
	RtpEncodingParameters encoding_params;
	encoding_params.ssrc = rtc::Optional<uint32_t>(ssrc);
	params.encodings.push_back(encoding_params);
	}
	return params;
	}

	rtc::scoped_refptr<MockRtpSender> CreateMockRtpSender(
	cricket::MediaType media_type,
	std::initializer_list<uint32_t> ssrcs,
	rtc::scoped_refptr<MediaStreamTrackInterface> track) {
	uint32_t first_ssrc;
	if (ssrcs.size()) {
	first_ssrc = *ssrcs.begin();
	} else {
	first_ssrc = 0;
	}
	rtc::scoped_refptr<MockRtpSender> sender(
	new rtc::RefCountedObject<MockRtpSender>());
	EXPECT_CALL(*sender, track()).WillRepeatedly(testing::Return(track));
	EXPECT_CALL(*sender, ssrc()).WillRepeatedly(testing::Return(first_ssrc));
	EXPECT_CALL(*sender, media_type())
	.WillRepeatedly(testing::Return(media_type));
	EXPECT_CALL(*sender, GetParameters())
	.WillRepeatedly(testing::Return(CreateRtpParametersWithSsrcs(ssrcs)));
	return sender;
	}

	rtc::scoped_refptr<MockRtpReceiver> CreateMockRtpReceiver(
	cricket::MediaType media_type,
	std::initializer_list<uint32_t> ssrcs,
	rtc::scoped_refptr<MediaStreamTrackInterface> track) {
	rtc::scoped_refptr<MockRtpReceiver> receiver(
	new rtc::RefCountedObject<MockRtpReceiver>());
	EXPECT_CALL(*receiver, track()).WillRepeatedly(testing::Return(track));
	EXPECT_CALL(*receiver, media_type())
	.WillRepeatedly(testing::Return(media_type));
	EXPECT_CALL(*receiver, GetParameters())
	.WillRepeatedly(testing::Return(CreateRtpParametersWithSsrcs(ssrcs)));
	return receiver;
	}

	class TrackMediaInfoMapTest : public testing::Test {
	public:
	TrackMediaInfoMapTest()
	: voice_media_info_(new cricket::VoiceMediaInfo()),
	video_media_info_(new cricket::VideoMediaInfo()),
	local_audio_track_(AudioTrack::Create("LocalAudioTrack", nullptr)),
	remote_audio_track_(AudioTrack::Create("RemoteAudioTrack", nullptr)),
	local_video_track_(
	VideoTrack::Create("LocalVideoTrack",
	FakeVideoTrackSource::Create(false),
	rtc::Thread::Current())),
	remote_video_track_(
	VideoTrack::Create("RemoteVideoTrack",
	FakeVideoTrackSource::Create(false),
	rtc::Thread::Current())) {}

	~TrackMediaInfoMapTest() {
	// If we have a map the ownership has been passed to the map, only delete if
	// \|CreateMap\| has not been called.
	if (!map_) {
	delete voice_media_info_;
	delete video_media_info_;
	}
	}

	void AddRtpSenderWithSsrcs(std::initializer_list<uint32_t> ssrcs,
	MediaStreamTrackInterface* local_track) {
	rtc::scoped_refptr<MockRtpSender> rtp_sender = CreateMockRtpSender(
	local_track->kind() == MediaStreamTrackInterface::kAudioKind
	? cricket::MEDIA_TYPE_AUDIO
	: cricket::MEDIA_TYPE_VIDEO,
	ssrcs, local_track);
	rtp_senders_.push_back(rtp_sender);

	if (local_track->kind() == MediaStreamTrackInterface::kAudioKind) {
	cricket::VoiceSenderInfo voice_sender_info;
	size_t i = 0;
	for (uint32_t ssrc : ssrcs) {
	voice_sender_info.local_stats.push_back(cricket::SsrcSenderInfo());
	voice_sender_info.local_stats[i++].ssrc = ssrc;
	}
	voice_media_info_->senders.push_back(voice_sender_info);
	} else {
	cricket::VideoSenderInfo video_sender_info;
	size_t i = 0;
	for (uint32_t ssrc : ssrcs) {
	video_sender_info.local_stats.push_back(cricket::SsrcSenderInfo());
	video_sender_info.local_stats[i++].ssrc = ssrc;
	}
	video_media_info_->senders.push_back(video_sender_info);
	}
	}

	void AddRtpReceiverWithSsrcs(std::initializer_list<uint32_t> ssrcs,
	MediaStreamTrackInterface* remote_track) {
	rtc::scoped_refptr<MockRtpReceiver> rtp_receiver = CreateMockRtpReceiver(
	remote_track->kind() == MediaStreamTrackInterface::kAudioKind
	? cricket::MEDIA_TYPE_AUDIO
	: cricket::MEDIA_TYPE_VIDEO,
	ssrcs, remote_track);
	rtp_receivers_.push_back(rtp_receiver);

	if (remote_track->kind() == MediaStreamTrackInterface::kAudioKind) {
	cricket::VoiceReceiverInfo voice_receiver_info;
	size_t i = 0;
	for (uint32_t ssrc : ssrcs) {
	voice_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
	voice_receiver_info.local_stats[i++].ssrc = ssrc;
	}
	voice_media_info_->receivers.push_back(voice_receiver_info);
	} else {
	cricket::VideoReceiverInfo video_receiver_info;
	size_t i = 0;
	for (uint32_t ssrc : ssrcs) {
	video_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
	video_receiver_info.local_stats[i++].ssrc = ssrc;
	}
	video_media_info_->receivers.push_back(video_receiver_info);
	}
	}

	void CreateMap() {
	RTC_DCHECK(!map_);
	map_.reset(new TrackMediaInfoMap(
	std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info_),
	std::unique_ptr<cricket::VideoMediaInfo>(video_media_info_),
	rtp_senders_, rtp_receivers_));
	}

	protected:
	cricket::VoiceMediaInfo* voice_media_info_;
	cricket::VideoMediaInfo* video_media_info_;
	std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders_;
	std::vector<rtc::scoped_refptr<RtpReceiverInterface>> rtp_receivers_;
	std::unique_ptr<TrackMediaInfoMap> map_;
	rtc::scoped_refptr<AudioTrack> local_audio_track_;
	rtc::scoped_refptr<AudioTrack> remote_audio_track_;
	rtc::scoped_refptr<VideoTrack> local_video_track_;
	rtc::scoped_refptr<VideoTrack> remote_video_track_;
	};

	} // namespace

	TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithOneSsrc) {
	AddRtpSenderWithSsrcs({1}, local_audio_track_);
	AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
	AddRtpSenderWithSsrcs({3}, local_video_track_);
	AddRtpReceiverWithSsrcs({4}, remote_video_track_);
	CreateMap();

	// Local audio track <-> RTP audio sender
	ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_EQ(
	map_->GetVoiceSenderInfos(local_audio_track_),
	std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
	local_audio_track_.get());

	// Remote audio track <-> RTP audio receiver
	EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
	&voice_media_info_->receivers[0]);
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
	remote_audio_track_.get());

	// Local video track <-> RTP video sender
	ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_EQ(
	map_->GetVideoSenderInfos(local_video_track_),
	std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
	local_video_track_.get());

	// Remote video track <-> RTP video receiver
	EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
	&video_media_info_->receivers[0]);
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
	remote_video_track_.get());
	}

	TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithMissingSsrc) {
	AddRtpSenderWithSsrcs({}, local_audio_track_);
	AddRtpSenderWithSsrcs({}, local_video_track_);
	AddRtpReceiverWithSsrcs({}, remote_audio_track_);
	AddRtpReceiverWithSsrcs({}, remote_video_track_);
	CreateMap();

	EXPECT_FALSE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_FALSE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_FALSE(map_->GetVoiceReceiverInfo(*remote_audio_track_));
	EXPECT_FALSE(map_->GetVideoReceiverInfo(*remote_video_track_));
	}

	TEST_F(TrackMediaInfoMapTest,
	SingleSenderReceiverPerTrackWithAudioAndVideoUseSameSsrc) {
	AddRtpSenderWithSsrcs({1}, local_audio_track_);
	AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
	AddRtpSenderWithSsrcs({1}, local_video_track_);
	AddRtpReceiverWithSsrcs({2}, remote_video_track_);
	CreateMap();

	// Local audio track <-> RTP audio sender
	ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_EQ(
	map_->GetVoiceSenderInfos(local_audio_track_),
	std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
	local_audio_track_.get());

	// Remote audio track <-> RTP audio receiver
	EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
	&voice_media_info_->receivers[0]);
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
	remote_audio_track_.get());

	// Local video track <-> RTP video sender
	ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_EQ(
	map_->GetVideoSenderInfos(local_video_track_),
	std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
	local_video_track_.get());

	// Remote video track <-> RTP video receiver
	EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
	&video_media_info_->receivers[0]);
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
	remote_video_track_.get());
	}

	TEST_F(TrackMediaInfoMapTest, SingleMultiSsrcSenderPerTrack) {
	AddRtpSenderWithSsrcs({1, 2}, local_audio_track_);
	AddRtpSenderWithSsrcs({3, 4}, local_video_track_);
	CreateMap();

	// Local audio track <-> RTP audio senders
	ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_EQ(
	map_->GetVoiceSenderInfos(local_audio_track_),
	std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
	local_audio_track_.get());

	// Local video track <-> RTP video senders
	ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_EQ(
	map_->GetVideoSenderInfos(local_video_track_),
	std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
	local_video_track_.get());
	}

	TEST_F(TrackMediaInfoMapTest, MultipleOneSsrcSendersPerTrack) {
	AddRtpSenderWithSsrcs({1}, local_audio_track_);
	AddRtpSenderWithSsrcs({2}, local_audio_track_);
	AddRtpSenderWithSsrcs({3}, local_video_track_);
	AddRtpSenderWithSsrcs({4}, local_video_track_);
	CreateMap();

	// Local audio track <-> RTP audio senders
	ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_EQ(
	map_->GetVoiceSenderInfos(local_audio_track_),
	std::vector<cricket::VoiceSenderInfo*>(
	{&voice_media_info_->senders[0], &voice_media_info_->senders[1]}));
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
	local_audio_track_.get());
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[1]),
	local_audio_track_.get());

	// Local video track <-> RTP video senders
	ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_EQ(
	map_->GetVideoSenderInfos(local_video_track_),
	std::vector<cricket::VideoSenderInfo*>(
	{&video_media_info_->senders[0], &video_media_info_->senders[1]}));
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
	local_video_track_.get());
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[1]),
	local_video_track_.get());
	}

	TEST_F(TrackMediaInfoMapTest, MultipleMultiSsrcSendersPerTrack) {
	AddRtpSenderWithSsrcs({1, 2}, local_audio_track_);
	AddRtpSenderWithSsrcs({3, 4}, local_audio_track_);
	AddRtpSenderWithSsrcs({5, 6}, local_video_track_);
	AddRtpSenderWithSsrcs({7, 8}, local_video_track_);
	CreateMap();

	// Local audio track <-> RTP audio senders
	ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_EQ(
	map_->GetVoiceSenderInfos(local_audio_track_),
	std::vector<cricket::VoiceSenderInfo*>(
	{&voice_media_info_->senders[0], &voice_media_info_->senders[1]}));
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
	local_audio_track_.get());
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[1]),
	local_audio_track_.get());

	// Local video track <-> RTP video senders
	ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_EQ(
	map_->GetVideoSenderInfos(local_video_track_),
	std::vector<cricket::VideoSenderInfo*>(
	{&video_media_info_->senders[0], &video_media_info_->senders[1]}));
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
	local_video_track_.get());
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[1]),
	local_video_track_.get());
	}

	// SSRCs can be reused for send and receive in loopback.
	TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithSsrcNotUnique) {
	AddRtpSenderWithSsrcs({1}, local_audio_track_);
	AddRtpReceiverWithSsrcs({1}, remote_audio_track_);
	AddRtpSenderWithSsrcs({2}, local_video_track_);
	AddRtpReceiverWithSsrcs({2}, remote_video_track_);
	CreateMap();

	// Local audio track <-> RTP audio senders
	ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
	EXPECT_EQ(
	map_->GetVoiceSenderInfos(local_audio_track_),
	std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
	local_audio_track_.get());

	// Remote audio track <-> RTP audio receiver
	EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
	&voice_media_info_->receivers[0]);
	EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
	remote_audio_track_.get());

	// Local video track <-> RTP video senders
	ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
	EXPECT_EQ(
	map_->GetVideoSenderInfos(local_video_track_),
	std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
	local_video_track_.get());

	// Remote video track <-> RTP video receiver
	EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
	&video_media_info_->receivers[0]);
	EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
	remote_video_track_.get());
	}

	// Death tests.
	// Disabled on Android because death tests misbehave on Android, see
	// base/test/gtest_util.h.
	#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)

	class TrackMediaInfoMapDeathTest : public TrackMediaInfoMapTest {};

	TEST_F(TrackMediaInfoMapDeathTest, MultipleOneSsrcReceiversPerTrack) {
	AddRtpReceiverWithSsrcs({1}, remote_audio_track_);
	AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
	AddRtpReceiverWithSsrcs({3}, remote_video_track_);
	AddRtpReceiverWithSsrcs({4}, remote_video_track_);
	EXPECT_DEATH(CreateMap(), "");
	}

	TEST_F(TrackMediaInfoMapDeathTest, MultipleMultiSsrcReceiversPerTrack) {
	AddRtpReceiverWithSsrcs({1, 2}, remote_audio_track_);
	AddRtpReceiverWithSsrcs({3, 4}, remote_audio_track_);
	AddRtpReceiverWithSsrcs({5, 6}, remote_video_track_);
	AddRtpReceiverWithSsrcs({7, 8}, remote_video_track_);
	EXPECT_DEATH(CreateMap(), "");
	}

	#endif // RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)

	} // namespace webrtc