1 /*
2 * Copyright 2016 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "pc/track_media_info_map.h"
12
13 #include <initializer_list>
14 #include <memory>
15 #include <string>
16 #include <utility>
17 #include <vector>
18
19 #include "api/rtp_sender_interface.h"
20 #include "api/transport/rtp/rtp_source.h"
21 #include "media/base/media_channel.h"
22 #include "pc/audio_track.h"
23 #include "pc/test/fake_video_track_source.h"
24 #include "pc/test/mock_rtp_receiver_internal.h"
25 #include "pc/test/mock_rtp_sender_internal.h"
26 #include "pc/video_track.h"
27 #include "rtc_base/ref_count.h"
28 #include "test/gtest.h"
29
30 namespace webrtc {
31
32 namespace {
33
CreateRtpParametersWithSsrcs(std::initializer_list<uint32_t> ssrcs)34 RtpParameters CreateRtpParametersWithSsrcs(
35 std::initializer_list<uint32_t> ssrcs) {
36 RtpParameters params;
37 for (uint32_t ssrc : ssrcs) {
38 RtpEncodingParameters encoding_params;
39 encoding_params.ssrc = ssrc;
40 params.encodings.push_back(encoding_params);
41 }
42 return params;
43 }
44
CreateMockRtpSender(cricket::MediaType media_type,std::initializer_list<uint32_t> ssrcs,rtc::scoped_refptr<MediaStreamTrackInterface> track)45 rtc::scoped_refptr<MockRtpSenderInternal> CreateMockRtpSender(
46 cricket::MediaType media_type,
47 std::initializer_list<uint32_t> ssrcs,
48 rtc::scoped_refptr<MediaStreamTrackInterface> track) {
49 uint32_t first_ssrc;
50 if (ssrcs.size()) {
51 first_ssrc = *ssrcs.begin();
52 } else {
53 first_ssrc = 0;
54 }
55 rtc::scoped_refptr<MockRtpSenderInternal> sender(
56 new rtc::RefCountedObject<MockRtpSenderInternal>());
57 EXPECT_CALL(*sender, track())
58 .WillRepeatedly(::testing::Return(std::move(track)));
59 EXPECT_CALL(*sender, ssrc()).WillRepeatedly(::testing::Return(first_ssrc));
60 EXPECT_CALL(*sender, media_type())
61 .WillRepeatedly(::testing::Return(media_type));
62 EXPECT_CALL(*sender, GetParameters())
63 .WillRepeatedly(::testing::Return(CreateRtpParametersWithSsrcs(ssrcs)));
64 EXPECT_CALL(*sender, AttachmentId()).WillRepeatedly(::testing::Return(1));
65 return sender;
66 }
67
CreateMockRtpReceiver(cricket::MediaType media_type,std::initializer_list<uint32_t> ssrcs,rtc::scoped_refptr<MediaStreamTrackInterface> track)68 rtc::scoped_refptr<MockRtpReceiverInternal> CreateMockRtpReceiver(
69 cricket::MediaType media_type,
70 std::initializer_list<uint32_t> ssrcs,
71 rtc::scoped_refptr<MediaStreamTrackInterface> track) {
72 rtc::scoped_refptr<MockRtpReceiverInternal> receiver(
73 new rtc::RefCountedObject<MockRtpReceiverInternal>());
74 EXPECT_CALL(*receiver, track())
75 .WillRepeatedly(::testing::Return(std::move(track)));
76 EXPECT_CALL(*receiver, media_type())
77 .WillRepeatedly(::testing::Return(media_type));
78 EXPECT_CALL(*receiver, GetParameters())
79 .WillRepeatedly(::testing::Return(CreateRtpParametersWithSsrcs(ssrcs)));
80 EXPECT_CALL(*receiver, AttachmentId()).WillRepeatedly(::testing::Return(1));
81 return receiver;
82 }
83
84 class TrackMediaInfoMapTest : public ::testing::Test {
85 public:
TrackMediaInfoMapTest()86 TrackMediaInfoMapTest() : TrackMediaInfoMapTest(true) {}
87
TrackMediaInfoMapTest(bool use_current_thread)88 explicit TrackMediaInfoMapTest(bool use_current_thread)
89 : voice_media_info_(new cricket::VoiceMediaInfo()),
90 video_media_info_(new cricket::VideoMediaInfo()),
91 local_audio_track_(AudioTrack::Create("LocalAudioTrack", nullptr)),
92 remote_audio_track_(AudioTrack::Create("RemoteAudioTrack", nullptr)),
93 local_video_track_(VideoTrack::Create(
94 "LocalVideoTrack",
95 FakeVideoTrackSource::Create(false),
96 use_current_thread ? rtc::Thread::Current() : nullptr)),
97 remote_video_track_(VideoTrack::Create(
98 "RemoteVideoTrack",
99 FakeVideoTrackSource::Create(false),
100 use_current_thread ? rtc::Thread::Current() : nullptr)) {}
101
~TrackMediaInfoMapTest()102 ~TrackMediaInfoMapTest() {
103 // If we have a map the ownership has been passed to the map, only delete if
104 // |CreateMap| has not been called.
105 if (!map_) {
106 delete voice_media_info_;
107 delete video_media_info_;
108 }
109 }
110
AddRtpSenderWithSsrcs(std::initializer_list<uint32_t> ssrcs,MediaStreamTrackInterface * local_track)111 void AddRtpSenderWithSsrcs(std::initializer_list<uint32_t> ssrcs,
112 MediaStreamTrackInterface* local_track) {
113 rtc::scoped_refptr<MockRtpSenderInternal> rtp_sender = CreateMockRtpSender(
114 local_track->kind() == MediaStreamTrackInterface::kAudioKind
115 ? cricket::MEDIA_TYPE_AUDIO
116 : cricket::MEDIA_TYPE_VIDEO,
117 ssrcs, local_track);
118 rtp_senders_.push_back(rtp_sender);
119
120 if (local_track->kind() == MediaStreamTrackInterface::kAudioKind) {
121 cricket::VoiceSenderInfo voice_sender_info;
122 size_t i = 0;
123 for (uint32_t ssrc : ssrcs) {
124 voice_sender_info.local_stats.push_back(cricket::SsrcSenderInfo());
125 voice_sender_info.local_stats[i++].ssrc = ssrc;
126 }
127 voice_media_info_->senders.push_back(voice_sender_info);
128 } else {
129 cricket::VideoSenderInfo video_sender_info;
130 size_t i = 0;
131 for (uint32_t ssrc : ssrcs) {
132 video_sender_info.local_stats.push_back(cricket::SsrcSenderInfo());
133 video_sender_info.local_stats[i++].ssrc = ssrc;
134 }
135 video_media_info_->senders.push_back(video_sender_info);
136 video_media_info_->aggregated_senders.push_back(video_sender_info);
137 }
138 }
139
AddRtpReceiverWithSsrcs(std::initializer_list<uint32_t> ssrcs,MediaStreamTrackInterface * remote_track)140 void AddRtpReceiverWithSsrcs(std::initializer_list<uint32_t> ssrcs,
141 MediaStreamTrackInterface* remote_track) {
142 auto rtp_receiver = CreateMockRtpReceiver(
143 remote_track->kind() == MediaStreamTrackInterface::kAudioKind
144 ? cricket::MEDIA_TYPE_AUDIO
145 : cricket::MEDIA_TYPE_VIDEO,
146 ssrcs, remote_track);
147 rtp_receivers_.push_back(rtp_receiver);
148
149 if (remote_track->kind() == MediaStreamTrackInterface::kAudioKind) {
150 cricket::VoiceReceiverInfo voice_receiver_info;
151 size_t i = 0;
152 for (uint32_t ssrc : ssrcs) {
153 voice_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
154 voice_receiver_info.local_stats[i++].ssrc = ssrc;
155 }
156 voice_media_info_->receivers.push_back(voice_receiver_info);
157 } else {
158 cricket::VideoReceiverInfo video_receiver_info;
159 size_t i = 0;
160 for (uint32_t ssrc : ssrcs) {
161 video_receiver_info.local_stats.push_back(cricket::SsrcReceiverInfo());
162 video_receiver_info.local_stats[i++].ssrc = ssrc;
163 }
164 video_media_info_->receivers.push_back(video_receiver_info);
165 }
166 }
167
CreateMap()168 void CreateMap() {
169 RTC_DCHECK(!map_);
170 map_.reset(new TrackMediaInfoMap(
171 std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info_),
172 std::unique_ptr<cricket::VideoMediaInfo>(video_media_info_),
173 rtp_senders_, rtp_receivers_));
174 }
175
176 protected:
177 cricket::VoiceMediaInfo* voice_media_info_;
178 cricket::VideoMediaInfo* video_media_info_;
179 std::vector<rtc::scoped_refptr<RtpSenderInternal>> rtp_senders_;
180 std::vector<rtc::scoped_refptr<RtpReceiverInternal>> rtp_receivers_;
181 std::unique_ptr<TrackMediaInfoMap> map_;
182 rtc::scoped_refptr<AudioTrack> local_audio_track_;
183 rtc::scoped_refptr<AudioTrack> remote_audio_track_;
184 rtc::scoped_refptr<VideoTrack> local_video_track_;
185 rtc::scoped_refptr<VideoTrack> remote_video_track_;
186 };
187
188 } // namespace
189
TEST_F(TrackMediaInfoMapTest,SingleSenderReceiverPerTrackWithOneSsrc)190 TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithOneSsrc) {
191 AddRtpSenderWithSsrcs({1}, local_audio_track_);
192 AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
193 AddRtpSenderWithSsrcs({3}, local_video_track_);
194 AddRtpReceiverWithSsrcs({4}, remote_video_track_);
195 CreateMap();
196
197 // Local audio track <-> RTP audio sender
198 ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
199 EXPECT_EQ(
200 *map_->GetVoiceSenderInfos(*local_audio_track_),
201 std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
202 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
203 local_audio_track_.get());
204
205 // Remote audio track <-> RTP audio receiver
206 EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
207 &voice_media_info_->receivers[0]);
208 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
209 remote_audio_track_.get());
210
211 // Local video track <-> RTP video sender
212 ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
213 EXPECT_EQ(
214 *map_->GetVideoSenderInfos(*local_video_track_),
215 std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
216 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
217 local_video_track_.get());
218
219 // Remote video track <-> RTP video receiver
220 EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
221 &video_media_info_->receivers[0]);
222 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
223 remote_video_track_.get());
224 }
225
TEST_F(TrackMediaInfoMapTest,SingleSenderReceiverPerTrackWithMissingSsrc)226 TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithMissingSsrc) {
227 AddRtpSenderWithSsrcs({}, local_audio_track_);
228 AddRtpSenderWithSsrcs({}, local_video_track_);
229 AddRtpReceiverWithSsrcs({}, remote_audio_track_);
230 AddRtpReceiverWithSsrcs({}, remote_video_track_);
231 CreateMap();
232
233 EXPECT_FALSE(map_->GetVoiceSenderInfos(*local_audio_track_));
234 EXPECT_FALSE(map_->GetVideoSenderInfos(*local_video_track_));
235 EXPECT_FALSE(map_->GetVoiceReceiverInfo(*remote_audio_track_));
236 EXPECT_FALSE(map_->GetVideoReceiverInfo(*remote_video_track_));
237 }
238
TEST_F(TrackMediaInfoMapTest,SingleSenderReceiverPerTrackWithAudioAndVideoUseSameSsrc)239 TEST_F(TrackMediaInfoMapTest,
240 SingleSenderReceiverPerTrackWithAudioAndVideoUseSameSsrc) {
241 AddRtpSenderWithSsrcs({1}, local_audio_track_);
242 AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
243 AddRtpSenderWithSsrcs({1}, local_video_track_);
244 AddRtpReceiverWithSsrcs({2}, remote_video_track_);
245 CreateMap();
246
247 // Local audio track <-> RTP audio sender
248 ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
249 EXPECT_EQ(
250 *map_->GetVoiceSenderInfos(*local_audio_track_),
251 std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
252 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
253 local_audio_track_.get());
254
255 // Remote audio track <-> RTP audio receiver
256 EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
257 &voice_media_info_->receivers[0]);
258 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
259 remote_audio_track_.get());
260
261 // Local video track <-> RTP video sender
262 ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
263 EXPECT_EQ(
264 *map_->GetVideoSenderInfos(*local_video_track_),
265 std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
266 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
267 local_video_track_.get());
268
269 // Remote video track <-> RTP video receiver
270 EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
271 &video_media_info_->receivers[0]);
272 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
273 remote_video_track_.get());
274 }
275
TEST_F(TrackMediaInfoMapTest,SingleMultiSsrcSenderPerTrack)276 TEST_F(TrackMediaInfoMapTest, SingleMultiSsrcSenderPerTrack) {
277 AddRtpSenderWithSsrcs({1, 2}, local_audio_track_);
278 AddRtpSenderWithSsrcs({3, 4}, local_video_track_);
279 CreateMap();
280
281 // Local audio track <-> RTP audio senders
282 ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
283 EXPECT_EQ(
284 *map_->GetVoiceSenderInfos(*local_audio_track_),
285 std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
286 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
287 local_audio_track_.get());
288
289 // Local video track <-> RTP video senders
290 ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
291 EXPECT_EQ(
292 *map_->GetVideoSenderInfos(*local_video_track_),
293 std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
294 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
295 local_video_track_.get());
296 }
297
TEST_F(TrackMediaInfoMapTest,MultipleOneSsrcSendersPerTrack)298 TEST_F(TrackMediaInfoMapTest, MultipleOneSsrcSendersPerTrack) {
299 AddRtpSenderWithSsrcs({1}, local_audio_track_);
300 AddRtpSenderWithSsrcs({2}, local_audio_track_);
301 AddRtpSenderWithSsrcs({3}, local_video_track_);
302 AddRtpSenderWithSsrcs({4}, local_video_track_);
303 CreateMap();
304
305 // Local audio track <-> RTP audio senders
306 ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
307 EXPECT_EQ(
308 *map_->GetVoiceSenderInfos(*local_audio_track_),
309 std::vector<cricket::VoiceSenderInfo*>(
310 {&voice_media_info_->senders[0], &voice_media_info_->senders[1]}));
311 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
312 local_audio_track_.get());
313 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[1]),
314 local_audio_track_.get());
315
316 // Local video track <-> RTP video senders
317 ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
318 EXPECT_EQ(
319 *map_->GetVideoSenderInfos(*local_video_track_),
320 std::vector<cricket::VideoSenderInfo*>(
321 {&video_media_info_->senders[0], &video_media_info_->senders[1]}));
322 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
323 local_video_track_.get());
324 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[1]),
325 local_video_track_.get());
326 }
327
TEST_F(TrackMediaInfoMapTest,MultipleMultiSsrcSendersPerTrack)328 TEST_F(TrackMediaInfoMapTest, MultipleMultiSsrcSendersPerTrack) {
329 AddRtpSenderWithSsrcs({1, 2}, local_audio_track_);
330 AddRtpSenderWithSsrcs({3, 4}, local_audio_track_);
331 AddRtpSenderWithSsrcs({5, 6}, local_video_track_);
332 AddRtpSenderWithSsrcs({7, 8}, local_video_track_);
333 CreateMap();
334
335 // Local audio track <-> RTP audio senders
336 ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
337 EXPECT_EQ(
338 *map_->GetVoiceSenderInfos(*local_audio_track_),
339 std::vector<cricket::VoiceSenderInfo*>(
340 {&voice_media_info_->senders[0], &voice_media_info_->senders[1]}));
341 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
342 local_audio_track_.get());
343 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[1]),
344 local_audio_track_.get());
345
346 // Local video track <-> RTP video senders
347 ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
348 EXPECT_EQ(
349 *map_->GetVideoSenderInfos(*local_video_track_),
350 std::vector<cricket::VideoSenderInfo*>(
351 {&video_media_info_->senders[0], &video_media_info_->senders[1]}));
352 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
353 local_video_track_.get());
354 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[1]),
355 local_video_track_.get());
356 }
357
358 // SSRCs can be reused for send and receive in loopback.
TEST_F(TrackMediaInfoMapTest,SingleSenderReceiverPerTrackWithSsrcNotUnique)359 TEST_F(TrackMediaInfoMapTest, SingleSenderReceiverPerTrackWithSsrcNotUnique) {
360 AddRtpSenderWithSsrcs({1}, local_audio_track_);
361 AddRtpReceiverWithSsrcs({1}, remote_audio_track_);
362 AddRtpSenderWithSsrcs({2}, local_video_track_);
363 AddRtpReceiverWithSsrcs({2}, remote_video_track_);
364 CreateMap();
365
366 // Local audio track <-> RTP audio senders
367 ASSERT_TRUE(map_->GetVoiceSenderInfos(*local_audio_track_));
368 EXPECT_EQ(
369 *map_->GetVoiceSenderInfos(*local_audio_track_),
370 std::vector<cricket::VoiceSenderInfo*>({&voice_media_info_->senders[0]}));
371 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->senders[0]),
372 local_audio_track_.get());
373
374 // Remote audio track <-> RTP audio receiver
375 EXPECT_EQ(map_->GetVoiceReceiverInfo(*remote_audio_track_),
376 &voice_media_info_->receivers[0]);
377 EXPECT_EQ(map_->GetAudioTrack(voice_media_info_->receivers[0]),
378 remote_audio_track_.get());
379
380 // Local video track <-> RTP video senders
381 ASSERT_TRUE(map_->GetVideoSenderInfos(*local_video_track_));
382 EXPECT_EQ(
383 *map_->GetVideoSenderInfos(*local_video_track_),
384 std::vector<cricket::VideoSenderInfo*>({&video_media_info_->senders[0]}));
385 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->senders[0]),
386 local_video_track_.get());
387
388 // Remote video track <-> RTP video receiver
389 EXPECT_EQ(map_->GetVideoReceiverInfo(*remote_video_track_),
390 &video_media_info_->receivers[0]);
391 EXPECT_EQ(map_->GetVideoTrack(video_media_info_->receivers[0]),
392 remote_video_track_.get());
393 }
394
TEST_F(TrackMediaInfoMapTest,SsrcLookupFunction)395 TEST_F(TrackMediaInfoMapTest, SsrcLookupFunction) {
396 AddRtpSenderWithSsrcs({1}, local_audio_track_);
397 AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
398 AddRtpSenderWithSsrcs({3}, local_video_track_);
399 AddRtpReceiverWithSsrcs({4}, remote_video_track_);
400 CreateMap();
401 EXPECT_TRUE(map_->GetVoiceSenderInfoBySsrc(1));
402 EXPECT_TRUE(map_->GetVoiceReceiverInfoBySsrc(2));
403 EXPECT_TRUE(map_->GetVideoSenderInfoBySsrc(3));
404 EXPECT_TRUE(map_->GetVideoReceiverInfoBySsrc(4));
405 EXPECT_FALSE(map_->GetVoiceSenderInfoBySsrc(2));
406 EXPECT_FALSE(map_->GetVoiceSenderInfoBySsrc(1024));
407 }
408
TEST_F(TrackMediaInfoMapTest,GetAttachmentIdByTrack)409 TEST_F(TrackMediaInfoMapTest, GetAttachmentIdByTrack) {
410 AddRtpSenderWithSsrcs({1}, local_audio_track_);
411 CreateMap();
412 EXPECT_EQ(rtp_senders_[0]->AttachmentId(),
413 map_->GetAttachmentIdByTrack(local_audio_track_));
414 EXPECT_EQ(absl::nullopt, map_->GetAttachmentIdByTrack(local_video_track_));
415 }
416
417 // Death tests.
418 // Disabled on Android because death tests misbehave on Android, see
419 // base/test/gtest_util.h.
420 #if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
421
422 class TrackMediaInfoMapDeathTest : public TrackMediaInfoMapTest {
423 public:
TrackMediaInfoMapDeathTest()424 TrackMediaInfoMapDeathTest() : TrackMediaInfoMapTest(false) {}
425 };
426
TEST_F(TrackMediaInfoMapDeathTest,MultipleOneSsrcReceiversPerTrack)427 TEST_F(TrackMediaInfoMapDeathTest, MultipleOneSsrcReceiversPerTrack) {
428 AddRtpReceiverWithSsrcs({1}, remote_audio_track_);
429 AddRtpReceiverWithSsrcs({2}, remote_audio_track_);
430 AddRtpReceiverWithSsrcs({3}, remote_video_track_);
431 AddRtpReceiverWithSsrcs({4}, remote_video_track_);
432 EXPECT_DEATH(CreateMap(), "");
433 }
434
TEST_F(TrackMediaInfoMapDeathTest,MultipleMultiSsrcReceiversPerTrack)435 TEST_F(TrackMediaInfoMapDeathTest, MultipleMultiSsrcReceiversPerTrack) {
436 AddRtpReceiverWithSsrcs({1, 2}, remote_audio_track_);
437 AddRtpReceiverWithSsrcs({3, 4}, remote_audio_track_);
438 AddRtpReceiverWithSsrcs({5, 6}, remote_video_track_);
439 AddRtpReceiverWithSsrcs({7, 8}, remote_video_track_);
440 EXPECT_DEATH(CreateMap(), "");
441 }
442
443 #endif // RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
444
445 } // namespace webrtc
446