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1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include <stdint.h> | |
6 | |
7 #include <vector> | |
8 | |
9 #include "base/bind.h" | |
10 #include "base/memory/scoped_ptr.h" | |
11 #include "base/test/simple_test_tick_clock.h" | |
12 #include "media/base/video_frame.h" | |
13 #include "media/cast/cast_environment.h" | |
14 #include "media/cast/logging/simple_event_subscriber.h" | |
15 #include "media/cast/test/fake_single_thread_task_runner.h" | |
16 #include "media/cast/test/fake_video_encode_accelerator.h" | |
17 #include "media/cast/test/utility/default_config.h" | |
18 #include "media/cast/test/utility/video_utility.h" | |
19 #include "media/cast/transport/cast_transport_config.h" | |
20 #include "media/cast/transport/cast_transport_sender_impl.h" | |
21 #include "media/cast/transport/pacing/paced_sender.h" | |
22 #include "media/cast/video_sender/video_sender.h" | |
23 #include "testing/gmock/include/gmock/gmock.h" | |
24 #include "testing/gtest/include/gtest/gtest.h" | |
25 | |
26 namespace media { | |
27 namespace cast { | |
28 | |
29 namespace { | |
30 static const uint8 kPixelValue = 123; | |
31 static const int kWidth = 320; | |
32 static const int kHeight = 240; | |
33 | |
34 using testing::_; | |
35 using testing::AtLeast; | |
36 | |
37 void CreateVideoEncodeAccelerator( | |
38 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, | |
39 scoped_ptr<VideoEncodeAccelerator> fake_vea, | |
40 const ReceiveVideoEncodeAcceleratorCallback& callback) { | |
41 callback.Run(task_runner, fake_vea.Pass()); | |
42 } | |
43 | |
44 void CreateSharedMemory( | |
45 size_t size, const ReceiveVideoEncodeMemoryCallback& callback) { | |
46 scoped_ptr<base::SharedMemory> shm(new base::SharedMemory()); | |
47 if (!shm->CreateAndMapAnonymous(size)) { | |
48 NOTREACHED(); | |
49 return; | |
50 } | |
51 callback.Run(shm.Pass()); | |
52 } | |
53 | |
54 class TestPacketSender : public transport::PacketSender { | |
55 public: | |
56 TestPacketSender() | |
57 : number_of_rtp_packets_(0), | |
58 number_of_rtcp_packets_(0), | |
59 paused_(false) {} | |
60 | |
61 // A singular packet implies a RTCP packet. | |
62 virtual bool SendPacket(transport::PacketRef packet, | |
63 const base::Closure& cb) OVERRIDE { | |
64 if (paused_) { | |
65 stored_packet_ = packet; | |
66 callback_ = cb; | |
67 return false; | |
68 } | |
69 if (Rtcp::IsRtcpPacket(&packet->data[0], packet->data.size())) { | |
70 ++number_of_rtcp_packets_; | |
71 } else { | |
72 // Check that at least one RTCP packet was sent before the first RTP | |
73 // packet. This confirms that the receiver will have the necessary lip | |
74 // sync info before it has to calculate the playout time of the first | |
75 // frame. | |
76 if (number_of_rtp_packets_ == 0) | |
77 EXPECT_LE(1, number_of_rtcp_packets_); | |
78 ++number_of_rtp_packets_; | |
79 } | |
80 return true; | |
81 } | |
82 | |
83 int number_of_rtp_packets() const { return number_of_rtp_packets_; } | |
84 | |
85 int number_of_rtcp_packets() const { return number_of_rtcp_packets_; } | |
86 | |
87 void SetPause(bool paused) { | |
88 paused_ = paused; | |
89 if (!paused && stored_packet_) { | |
90 SendPacket(stored_packet_, callback_); | |
91 callback_.Run(); | |
92 } | |
93 } | |
94 | |
95 private: | |
96 int number_of_rtp_packets_; | |
97 int number_of_rtcp_packets_; | |
98 bool paused_; | |
99 base::Closure callback_; | |
100 transport::PacketRef stored_packet_; | |
101 | |
102 DISALLOW_COPY_AND_ASSIGN(TestPacketSender); | |
103 }; | |
104 | |
105 class PeerVideoSender : public VideoSender { | |
106 public: | |
107 PeerVideoSender( | |
108 scoped_refptr<CastEnvironment> cast_environment, | |
109 const VideoSenderConfig& video_config, | |
110 const CreateVideoEncodeAcceleratorCallback& create_vea_cb, | |
111 const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb, | |
112 transport::CastTransportSender* const transport_sender) | |
113 : VideoSender(cast_environment, | |
114 video_config, | |
115 create_vea_cb, | |
116 create_video_encode_mem_cb, | |
117 transport_sender) {} | |
118 using VideoSender::OnReceivedCastFeedback; | |
119 }; | |
120 } // namespace | |
121 | |
122 class VideoSenderTest : public ::testing::Test { | |
123 protected: | |
124 VideoSenderTest() { | |
125 testing_clock_ = new base::SimpleTestTickClock(); | |
126 testing_clock_->Advance(base::TimeTicks::Now() - base::TimeTicks()); | |
127 task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_); | |
128 cast_environment_ = | |
129 new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_).Pass(), | |
130 task_runner_, | |
131 task_runner_, | |
132 task_runner_); | |
133 last_pixel_value_ = kPixelValue; | |
134 net::IPEndPoint dummy_endpoint; | |
135 transport_sender_.reset(new transport::CastTransportSenderImpl( | |
136 NULL, | |
137 testing_clock_, | |
138 dummy_endpoint, | |
139 base::Bind(&UpdateCastTransportStatus), | |
140 transport::BulkRawEventsCallback(), | |
141 base::TimeDelta(), | |
142 task_runner_, | |
143 &transport_)); | |
144 } | |
145 | |
146 virtual ~VideoSenderTest() {} | |
147 | |
148 virtual void TearDown() OVERRIDE { | |
149 video_sender_.reset(); | |
150 task_runner_->RunTasks(); | |
151 } | |
152 | |
153 static void UpdateCastTransportStatus(transport::CastTransportStatus status) { | |
154 EXPECT_EQ(transport::TRANSPORT_VIDEO_INITIALIZED, status); | |
155 } | |
156 | |
157 void InitEncoder(bool external) { | |
158 VideoSenderConfig video_config; | |
159 video_config.ssrc = 1; | |
160 video_config.incoming_feedback_ssrc = 2; | |
161 video_config.rtcp_c_name = "video_test@10.1.1.1"; | |
162 video_config.rtp_payload_type = 127; | |
163 video_config.use_external_encoder = external; | |
164 video_config.width = kWidth; | |
165 video_config.height = kHeight; | |
166 video_config.max_bitrate = 5000000; | |
167 video_config.min_bitrate = 1000000; | |
168 video_config.start_bitrate = 1000000; | |
169 video_config.max_qp = 56; | |
170 video_config.min_qp = 0; | |
171 video_config.max_frame_rate = 30; | |
172 video_config.max_number_of_video_buffers_used = 1; | |
173 video_config.codec = transport::CODEC_VIDEO_VP8; | |
174 | |
175 if (external) { | |
176 scoped_ptr<VideoEncodeAccelerator> fake_vea( | |
177 new test::FakeVideoEncodeAccelerator(task_runner_)); | |
178 video_sender_.reset( | |
179 new PeerVideoSender(cast_environment_, | |
180 video_config, | |
181 base::Bind(&CreateVideoEncodeAccelerator, | |
182 task_runner_, | |
183 base::Passed(&fake_vea)), | |
184 base::Bind(&CreateSharedMemory), | |
185 transport_sender_.get())); | |
186 } else { | |
187 video_sender_.reset( | |
188 new PeerVideoSender(cast_environment_, | |
189 video_config, | |
190 CreateDefaultVideoEncodeAcceleratorCallback(), | |
191 CreateDefaultVideoEncodeMemoryCallback(), | |
192 transport_sender_.get())); | |
193 } | |
194 ASSERT_EQ(STATUS_VIDEO_INITIALIZED, video_sender_->InitializationResult()); | |
195 } | |
196 | |
197 scoped_refptr<media::VideoFrame> GetNewVideoFrame() { | |
198 gfx::Size size(kWidth, kHeight); | |
199 scoped_refptr<media::VideoFrame> video_frame = | |
200 media::VideoFrame::CreateFrame( | |
201 VideoFrame::I420, size, gfx::Rect(size), size, base::TimeDelta()); | |
202 PopulateVideoFrame(video_frame, last_pixel_value_++); | |
203 return video_frame; | |
204 } | |
205 | |
206 scoped_refptr<media::VideoFrame> GetLargeNewVideoFrame() { | |
207 gfx::Size size(kWidth, kHeight); | |
208 scoped_refptr<media::VideoFrame> video_frame = | |
209 media::VideoFrame::CreateFrame( | |
210 VideoFrame::I420, size, gfx::Rect(size), size, base::TimeDelta()); | |
211 PopulateVideoFrameWithNoise(video_frame); | |
212 return video_frame; | |
213 } | |
214 | |
215 void RunTasks(int during_ms) { | |
216 task_runner_->Sleep(base::TimeDelta::FromMilliseconds(during_ms)); | |
217 } | |
218 | |
219 base::SimpleTestTickClock* testing_clock_; // Owned by CastEnvironment. | |
220 TestPacketSender transport_; | |
221 scoped_ptr<transport::CastTransportSenderImpl> transport_sender_; | |
222 scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_; | |
223 scoped_ptr<PeerVideoSender> video_sender_; | |
224 scoped_refptr<CastEnvironment> cast_environment_; | |
225 int last_pixel_value_; | |
226 | |
227 DISALLOW_COPY_AND_ASSIGN(VideoSenderTest); | |
228 }; | |
229 | |
230 TEST_F(VideoSenderTest, BuiltInEncoder) { | |
231 InitEncoder(false); | |
232 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
233 | |
234 const base::TimeTicks capture_time = testing_clock_->NowTicks(); | |
235 video_sender_->InsertRawVideoFrame(video_frame, capture_time); | |
236 | |
237 task_runner_->RunTasks(); | |
238 EXPECT_LE(1, transport_.number_of_rtp_packets()); | |
239 EXPECT_LE(1, transport_.number_of_rtcp_packets()); | |
240 } | |
241 | |
242 TEST_F(VideoSenderTest, ExternalEncoder) { | |
243 InitEncoder(true); | |
244 task_runner_->RunTasks(); | |
245 | |
246 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
247 | |
248 const base::TimeTicks capture_time = testing_clock_->NowTicks(); | |
249 video_sender_->InsertRawVideoFrame(video_frame, capture_time); | |
250 | |
251 task_runner_->RunTasks(); | |
252 | |
253 // We need to run the task to cleanup the GPU instance. | |
254 video_sender_.reset(NULL); | |
255 task_runner_->RunTasks(); | |
256 } | |
257 | |
258 TEST_F(VideoSenderTest, RtcpTimer) { | |
259 InitEncoder(false); | |
260 | |
261 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
262 | |
263 const base::TimeTicks capture_time = testing_clock_->NowTicks(); | |
264 video_sender_->InsertRawVideoFrame(video_frame, capture_time); | |
265 | |
266 // Make sure that we send at least one RTCP packet. | |
267 base::TimeDelta max_rtcp_timeout = | |
268 base::TimeDelta::FromMilliseconds(1 + kDefaultRtcpIntervalMs * 3 / 2); | |
269 | |
270 RunTasks(max_rtcp_timeout.InMilliseconds()); | |
271 EXPECT_LE(1, transport_.number_of_rtp_packets()); | |
272 EXPECT_LE(1, transport_.number_of_rtcp_packets()); | |
273 // Build Cast msg and expect RTCP packet. | |
274 RtcpCastMessage cast_feedback(1); | |
275 cast_feedback.media_ssrc_ = 2; | |
276 cast_feedback.ack_frame_id_ = 0; | |
277 video_sender_->OnReceivedCastFeedback(cast_feedback); | |
278 RunTasks(max_rtcp_timeout.InMilliseconds()); | |
279 EXPECT_LE(1, transport_.number_of_rtcp_packets()); | |
280 } | |
281 | |
282 TEST_F(VideoSenderTest, ResendTimer) { | |
283 InitEncoder(false); | |
284 | |
285 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
286 | |
287 const base::TimeTicks capture_time = testing_clock_->NowTicks(); | |
288 video_sender_->InsertRawVideoFrame(video_frame, capture_time); | |
289 | |
290 // ACK the key frame. | |
291 RtcpCastMessage cast_feedback(1); | |
292 cast_feedback.media_ssrc_ = 2; | |
293 cast_feedback.ack_frame_id_ = 0; | |
294 video_sender_->OnReceivedCastFeedback(cast_feedback); | |
295 | |
296 video_frame = GetNewVideoFrame(); | |
297 video_sender_->InsertRawVideoFrame(video_frame, capture_time); | |
298 | |
299 base::TimeDelta max_resend_timeout = | |
300 base::TimeDelta::FromMilliseconds(1 + kDefaultRtpMaxDelayMs); | |
301 | |
302 // Make sure that we do a re-send. | |
303 RunTasks(max_resend_timeout.InMilliseconds()); | |
304 // Should have sent at least 3 packets. | |
305 EXPECT_LE( | |
306 3, | |
307 transport_.number_of_rtp_packets() + transport_.number_of_rtcp_packets()); | |
308 } | |
309 | |
310 TEST_F(VideoSenderTest, LogAckReceivedEvent) { | |
311 InitEncoder(false); | |
312 SimpleEventSubscriber event_subscriber; | |
313 cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber); | |
314 | |
315 int num_frames = 10; | |
316 for (int i = 0; i < num_frames; i++) { | |
317 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
318 | |
319 const base::TimeTicks capture_time = testing_clock_->NowTicks(); | |
320 video_sender_->InsertRawVideoFrame(video_frame, capture_time); | |
321 RunTasks(33); | |
322 } | |
323 | |
324 task_runner_->RunTasks(); | |
325 | |
326 RtcpCastMessage cast_feedback(1); | |
327 cast_feedback.ack_frame_id_ = num_frames - 1; | |
328 | |
329 video_sender_->OnReceivedCastFeedback(cast_feedback); | |
330 | |
331 std::vector<FrameEvent> frame_events; | |
332 event_subscriber.GetFrameEventsAndReset(&frame_events); | |
333 | |
334 ASSERT_TRUE(!frame_events.empty()); | |
335 EXPECT_EQ(FRAME_ACK_RECEIVED, frame_events.rbegin()->type); | |
336 EXPECT_EQ(VIDEO_EVENT, frame_events.rbegin()->media_type); | |
337 EXPECT_EQ(num_frames - 1u, frame_events.rbegin()->frame_id); | |
338 | |
339 cast_environment_->Logging()->RemoveRawEventSubscriber(&event_subscriber); | |
340 } | |
341 | |
342 TEST_F(VideoSenderTest, StopSendingInTheAbsenceOfAck) { | |
343 InitEncoder(false); | |
344 // Send a stream of frames and don't ACK; by default we shouldn't have more | |
345 // than 4 frames in flight. | |
346 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
347 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
348 RunTasks(33); | |
349 | |
350 // Send 3 more frames and record the number of packets sent. | |
351 for (int i = 0; i < 3; ++i) { | |
352 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
353 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
354 RunTasks(33); | |
355 } | |
356 const int number_of_packets_sent = transport_.number_of_rtp_packets(); | |
357 | |
358 // Send 3 more frames - they should not be encoded, as we have not received | |
359 // any acks. | |
360 for (int i = 0; i < 3; ++i) { | |
361 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
362 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
363 RunTasks(33); | |
364 } | |
365 | |
366 // We expect a frame to be retransmitted because of duplicated ACKs. | |
367 // Only one packet of the frame is re-transmitted. | |
368 EXPECT_EQ(number_of_packets_sent + 1, | |
369 transport_.number_of_rtp_packets()); | |
370 | |
371 // Start acking and make sure we're back to steady-state. | |
372 RtcpCastMessage cast_feedback(1); | |
373 cast_feedback.media_ssrc_ = 2; | |
374 cast_feedback.ack_frame_id_ = 0; | |
375 video_sender_->OnReceivedCastFeedback(cast_feedback); | |
376 EXPECT_LE( | |
377 4, | |
378 transport_.number_of_rtp_packets() + transport_.number_of_rtcp_packets()); | |
379 | |
380 // Empty the pipeline. | |
381 RunTasks(100); | |
382 // Should have sent at least 7 packets. | |
383 EXPECT_LE( | |
384 7, | |
385 transport_.number_of_rtp_packets() + transport_.number_of_rtcp_packets()); | |
386 } | |
387 | |
388 TEST_F(VideoSenderTest, DuplicateAckRetransmit) { | |
389 InitEncoder(false); | |
390 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
391 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
392 RunTasks(33); | |
393 RtcpCastMessage cast_feedback(1); | |
394 cast_feedback.media_ssrc_ = 2; | |
395 cast_feedback.ack_frame_id_ = 0; | |
396 | |
397 // Send 3 more frames but don't ACK. | |
398 for (int i = 0; i < 3; ++i) { | |
399 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
400 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
401 RunTasks(33); | |
402 } | |
403 const int number_of_packets_sent = transport_.number_of_rtp_packets(); | |
404 | |
405 // Send duplicated ACKs and mix some invalid NACKs. | |
406 for (int i = 0; i < 10; ++i) { | |
407 RtcpCastMessage ack_feedback(1); | |
408 ack_feedback.media_ssrc_ = 2; | |
409 ack_feedback.ack_frame_id_ = 0; | |
410 RtcpCastMessage nack_feedback(1); | |
411 nack_feedback.media_ssrc_ = 2; | |
412 nack_feedback.missing_frames_and_packets_[255] = PacketIdSet(); | |
413 video_sender_->OnReceivedCastFeedback(ack_feedback); | |
414 video_sender_->OnReceivedCastFeedback(nack_feedback); | |
415 } | |
416 EXPECT_EQ(number_of_packets_sent, transport_.number_of_rtp_packets()); | |
417 | |
418 // Re-transmit one packet because of duplicated ACKs. | |
419 for (int i = 0; i < 3; ++i) { | |
420 RtcpCastMessage ack_feedback(1); | |
421 ack_feedback.media_ssrc_ = 2; | |
422 ack_feedback.ack_frame_id_ = 0; | |
423 video_sender_->OnReceivedCastFeedback(ack_feedback); | |
424 } | |
425 EXPECT_EQ(number_of_packets_sent + 1, transport_.number_of_rtp_packets()); | |
426 } | |
427 | |
428 TEST_F(VideoSenderTest, DuplicateAckRetransmitDoesNotCancelRetransmits) { | |
429 InitEncoder(false); | |
430 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
431 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
432 RunTasks(33); | |
433 RtcpCastMessage cast_feedback(1); | |
434 cast_feedback.media_ssrc_ = 2; | |
435 cast_feedback.ack_frame_id_ = 0; | |
436 | |
437 // Send 2 more frames but don't ACK. | |
438 for (int i = 0; i < 2; ++i) { | |
439 scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame(); | |
440 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
441 RunTasks(33); | |
442 } | |
443 // Pause the transport | |
444 transport_.SetPause(true); | |
445 | |
446 // Insert one more video frame. | |
447 video_frame = GetLargeNewVideoFrame(); | |
448 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
449 RunTasks(33); | |
450 | |
451 const int number_of_packets_sent = transport_.number_of_rtp_packets(); | |
452 | |
453 // Send duplicated ACKs and mix some invalid NACKs. | |
454 for (int i = 0; i < 10; ++i) { | |
455 RtcpCastMessage ack_feedback(1); | |
456 ack_feedback.media_ssrc_ = 2; | |
457 ack_feedback.ack_frame_id_ = 0; | |
458 RtcpCastMessage nack_feedback(1); | |
459 nack_feedback.media_ssrc_ = 2; | |
460 nack_feedback.missing_frames_and_packets_[255] = PacketIdSet(); | |
461 video_sender_->OnReceivedCastFeedback(ack_feedback); | |
462 video_sender_->OnReceivedCastFeedback(nack_feedback); | |
463 } | |
464 EXPECT_EQ(number_of_packets_sent, transport_.number_of_rtp_packets()); | |
465 | |
466 // Re-transmit one packet because of duplicated ACKs. | |
467 for (int i = 0; i < 3; ++i) { | |
468 RtcpCastMessage ack_feedback(1); | |
469 ack_feedback.media_ssrc_ = 2; | |
470 ack_feedback.ack_frame_id_ = 0; | |
471 video_sender_->OnReceivedCastFeedback(ack_feedback); | |
472 } | |
473 | |
474 transport_.SetPause(false); | |
475 RunTasks(100); | |
476 EXPECT_LT(number_of_packets_sent + 1, transport_.number_of_rtp_packets()); | |
477 } | |
478 | |
479 TEST_F(VideoSenderTest, AcksCancelRetransmits) { | |
480 InitEncoder(false); | |
481 transport_.SetPause(true); | |
482 scoped_refptr<media::VideoFrame> video_frame = GetLargeNewVideoFrame(); | |
483 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
484 RunTasks(33); | |
485 | |
486 // Frame should be in buffer, waiting. Now let's ack it. | |
487 RtcpCastMessage cast_feedback(1); | |
488 cast_feedback.media_ssrc_ = 2; | |
489 cast_feedback.ack_frame_id_ = 0; | |
490 video_sender_->OnReceivedCastFeedback(cast_feedback); | |
491 | |
492 transport_.SetPause(false); | |
493 RunTasks(33); | |
494 EXPECT_EQ(0, transport_.number_of_rtp_packets()); | |
495 } | |
496 | |
497 TEST_F(VideoSenderTest, NAcksCancelRetransmits) { | |
498 InitEncoder(false); | |
499 transport_.SetPause(true); | |
500 // Send two video frames. | |
501 scoped_refptr<media::VideoFrame> video_frame = GetLargeNewVideoFrame(); | |
502 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
503 RunTasks(33); | |
504 video_frame = GetLargeNewVideoFrame(); | |
505 video_sender_->InsertRawVideoFrame(video_frame, testing_clock_->NowTicks()); | |
506 RunTasks(33); | |
507 | |
508 // Frames should be in buffer, waiting. Now let's ack the first one and nack | |
509 // one packet in the second one. | |
510 RtcpCastMessage cast_feedback(1); | |
511 cast_feedback.media_ssrc_ = 2; | |
512 cast_feedback.ack_frame_id_ = 0; | |
513 PacketIdSet missing_packets; | |
514 missing_packets.insert(0); | |
515 cast_feedback.missing_frames_and_packets_[1] = missing_packets; | |
516 video_sender_->OnReceivedCastFeedback(cast_feedback); | |
517 | |
518 transport_.SetPause(false); | |
519 RunTasks(33); | |
520 // Only one packet should be retransmitted. | |
521 EXPECT_EQ(1, transport_.number_of_rtp_packets()); | |
522 } | |
523 | |
524 } // namespace cast | |
525 } // namespace media | |
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