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Side by Side Diff: talk/app/webrtc/videosource_unittest.cc

Issue 1610243002: Move talk/app/webrtc to webrtc/api (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Updated location for peerconnection_unittests.isolate Created 4 years, 11 months ago
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1 /*
2 * libjingle
3 * Copyright 2012 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <string>
29 #include <vector>
30
31 #include "talk/app/webrtc/remotevideocapturer.h"
32 #include "talk/app/webrtc/test/fakeconstraints.h"
33 #include "talk/app/webrtc/videosource.h"
34 #include "talk/media/base/fakemediaengine.h"
35 #include "talk/media/base/fakevideocapturer.h"
36 #include "talk/media/base/fakevideorenderer.h"
37 #include "talk/media/webrtc/webrtcvideoframe.h"
38 #include "talk/session/media/channelmanager.h"
39 #include "webrtc/base/gunit.h"
40
41 using webrtc::FakeConstraints;
42 using webrtc::VideoSource;
43 using webrtc::MediaConstraintsInterface;
44 using webrtc::MediaSourceInterface;
45 using webrtc::ObserverInterface;
46 using webrtc::VideoSourceInterface;
47
48 namespace {
49
50 // Max wait time for a test.
51 const int kMaxWaitMs = 100;
52
53 } // anonymous namespace
54
55
56 // TestVideoCapturer extends cricket::FakeVideoCapturer so it can be used for
57 // testing without known camera formats.
58 // It keeps its own lists of cricket::VideoFormats for the unit tests in this
59 // file.
60 class TestVideoCapturer : public cricket::FakeVideoCapturer {
61 public:
62 TestVideoCapturer() : test_without_formats_(false) {
63 std::vector<cricket::VideoFormat> formats;
64 formats.push_back(cricket::VideoFormat(1280, 720,
65 cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
66 formats.push_back(cricket::VideoFormat(640, 480,
67 cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
68 formats.push_back(cricket::VideoFormat(640, 400,
69 cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
70 formats.push_back(cricket::VideoFormat(320, 240,
71 cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
72 formats.push_back(cricket::VideoFormat(352, 288,
73 cricket::VideoFormat::FpsToInterval(30), cricket::FOURCC_I420));
74 ResetSupportedFormats(formats);
75 }
76
77 // This function is used for resetting the supported capture formats and
78 // simulating a cricket::VideoCapturer implementation that don't support
79 // capture format enumeration. This is used to simulate the current
80 // Chrome implementation.
81 void TestWithoutCameraFormats() {
82 test_without_formats_ = true;
83 std::vector<cricket::VideoFormat> formats;
84 ResetSupportedFormats(formats);
85 }
86
87 virtual cricket::CaptureState Start(
88 const cricket::VideoFormat& capture_format) {
89 if (test_without_formats_) {
90 std::vector<cricket::VideoFormat> formats;
91 formats.push_back(capture_format);
92 ResetSupportedFormats(formats);
93 }
94 return FakeVideoCapturer::Start(capture_format);
95 }
96
97 virtual bool GetBestCaptureFormat(const cricket::VideoFormat& desired,
98 cricket::VideoFormat* best_format) {
99 if (test_without_formats_) {
100 *best_format = desired;
101 return true;
102 }
103 return FakeVideoCapturer::GetBestCaptureFormat(desired,
104 best_format);
105 }
106
107 private:
108 bool test_without_formats_;
109 };
110
111 class StateObserver : public ObserverInterface {
112 public:
113 explicit StateObserver(VideoSourceInterface* source)
114 : state_(source->state()),
115 source_(source) {
116 }
117 virtual void OnChanged() {
118 state_ = source_->state();
119 }
120 MediaSourceInterface::SourceState state() const { return state_; }
121
122 private:
123 MediaSourceInterface::SourceState state_;
124 rtc::scoped_refptr<VideoSourceInterface> source_;
125 };
126
127 class VideoSourceTest : public testing::Test {
128 protected:
129 VideoSourceTest()
130 : capturer_cleanup_(new TestVideoCapturer()),
131 capturer_(capturer_cleanup_.get()),
132 channel_manager_(new cricket::ChannelManager(
133 new cricket::FakeMediaEngine(), rtc::Thread::Current())) {
134 }
135
136 void SetUp() {
137 ASSERT_TRUE(channel_manager_->Init());
138 }
139
140 void CreateVideoSource() {
141 CreateVideoSource(NULL);
142 }
143
144 void CreateVideoSource(
145 const webrtc::MediaConstraintsInterface* constraints) {
146 // VideoSource take ownership of |capturer_|
147 source_ =
148 VideoSource::Create(channel_manager_.get(), capturer_cleanup_.release(),
149 constraints, false);
150
151 ASSERT_TRUE(source_.get() != NULL);
152 EXPECT_EQ(capturer_, source_->GetVideoCapturer());
153
154 state_observer_.reset(new StateObserver(source_));
155 source_->RegisterObserver(state_observer_.get());
156 source_->AddSink(&renderer_);
157 }
158
159 rtc::scoped_ptr<TestVideoCapturer> capturer_cleanup_;
160 TestVideoCapturer* capturer_;
161 cricket::FakeVideoRenderer renderer_;
162 rtc::scoped_ptr<cricket::ChannelManager> channel_manager_;
163 rtc::scoped_ptr<StateObserver> state_observer_;
164 rtc::scoped_refptr<VideoSource> source_;
165 };
166
167
168 // Test that a VideoSource transition to kLive state when the capture
169 // device have started and kEnded if it is stopped.
170 // It also test that an output can receive video frames.
171 TEST_F(VideoSourceTest, CapturerStartStop) {
172 // Initialize without constraints.
173 CreateVideoSource();
174 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
175 kMaxWaitMs);
176
177 ASSERT_TRUE(capturer_->CaptureFrame());
178 EXPECT_EQ(1, renderer_.num_rendered_frames());
179
180 capturer_->Stop();
181 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
182 kMaxWaitMs);
183 }
184
185 // Test that a VideoSource can be stopped and restarted.
186 TEST_F(VideoSourceTest, StopRestart) {
187 // Initialize without constraints.
188 CreateVideoSource();
189 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
190 kMaxWaitMs);
191
192 ASSERT_TRUE(capturer_->CaptureFrame());
193 EXPECT_EQ(1, renderer_.num_rendered_frames());
194
195 source_->Stop();
196 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
197 kMaxWaitMs);
198
199 source_->Restart();
200 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
201 kMaxWaitMs);
202
203 ASSERT_TRUE(capturer_->CaptureFrame());
204 EXPECT_EQ(2, renderer_.num_rendered_frames());
205
206 source_->Stop();
207 }
208
209 // Test start stop with a remote VideoSource - the video source that has a
210 // RemoteVideoCapturer and takes video frames from FrameInput.
211 TEST_F(VideoSourceTest, StartStopRemote) {
212 source_ = VideoSource::Create(channel_manager_.get(),
213 new webrtc::RemoteVideoCapturer(), NULL, true);
214
215 ASSERT_TRUE(source_.get() != NULL);
216 EXPECT_TRUE(NULL != source_->GetVideoCapturer());
217
218 state_observer_.reset(new StateObserver(source_));
219 source_->RegisterObserver(state_observer_.get());
220 source_->AddSink(&renderer_);
221
222 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
223 kMaxWaitMs);
224
225 cricket::VideoRenderer* frameinput = source_->FrameInput();
226 cricket::WebRtcVideoFrame test_frame;
227 frameinput->RenderFrame(&test_frame);
228 EXPECT_EQ(1, renderer_.num_rendered_frames());
229
230 source_->GetVideoCapturer()->Stop();
231 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
232 kMaxWaitMs);
233 }
234
235 // Test that a VideoSource transition to kEnded if the capture device
236 // fails.
237 TEST_F(VideoSourceTest, CameraFailed) {
238 CreateVideoSource();
239 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
240 kMaxWaitMs);
241
242 capturer_->SignalStateChange(capturer_, cricket::CS_FAILED);
243 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
244 kMaxWaitMs);
245 }
246
247 // Test that the capture output is CIF if we set max constraints to CIF.
248 // and the capture device support CIF.
249 TEST_F(VideoSourceTest, MandatoryConstraintCif5Fps) {
250 FakeConstraints constraints;
251 constraints.AddMandatory(MediaConstraintsInterface::kMaxWidth, 352);
252 constraints.AddMandatory(MediaConstraintsInterface::kMaxHeight, 288);
253 constraints.AddMandatory(MediaConstraintsInterface::kMaxFrameRate, 5);
254
255 CreateVideoSource(&constraints);
256 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
257 kMaxWaitMs);
258 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
259 ASSERT_TRUE(format != NULL);
260 EXPECT_EQ(352, format->width);
261 EXPECT_EQ(288, format->height);
262 EXPECT_EQ(30, format->framerate());
263 }
264
265 // Test that the capture output is 720P if the camera support it and the
266 // optional constraint is set to 720P.
267 TEST_F(VideoSourceTest, MandatoryMinVgaOptional720P) {
268 FakeConstraints constraints;
269 constraints.AddMandatory(MediaConstraintsInterface::kMinWidth, 640);
270 constraints.AddMandatory(MediaConstraintsInterface::kMinHeight, 480);
271 constraints.AddOptional(MediaConstraintsInterface::kMinWidth, 1280);
272 constraints.AddOptional(MediaConstraintsInterface::kMinAspectRatio,
273 1280.0 / 720);
274
275 CreateVideoSource(&constraints);
276 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
277 kMaxWaitMs);
278 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
279 ASSERT_TRUE(format != NULL);
280 EXPECT_EQ(1280, format->width);
281 EXPECT_EQ(720, format->height);
282 EXPECT_EQ(30, format->framerate());
283 }
284
285 // Test that the capture output have aspect ratio 4:3 if a mandatory constraint
286 // require it even if an optional constraint request a higher resolution
287 // that don't have this aspect ratio.
288 TEST_F(VideoSourceTest, MandatoryAspectRatio4To3) {
289 FakeConstraints constraints;
290 constraints.AddMandatory(MediaConstraintsInterface::kMinWidth, 640);
291 constraints.AddMandatory(MediaConstraintsInterface::kMinHeight, 480);
292 constraints.AddMandatory(MediaConstraintsInterface::kMaxAspectRatio,
293 640.0 / 480);
294 constraints.AddOptional(MediaConstraintsInterface::kMinWidth, 1280);
295
296 CreateVideoSource(&constraints);
297 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
298 kMaxWaitMs);
299 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
300 ASSERT_TRUE(format != NULL);
301 EXPECT_EQ(640, format->width);
302 EXPECT_EQ(480, format->height);
303 EXPECT_EQ(30, format->framerate());
304 }
305
306
307 // Test that the source state transition to kEnded if the mandatory aspect ratio
308 // is set higher than supported.
309 TEST_F(VideoSourceTest, MandatoryAspectRatioTooHigh) {
310 FakeConstraints constraints;
311 constraints.AddMandatory(MediaConstraintsInterface::kMinAspectRatio, 2);
312 CreateVideoSource(&constraints);
313 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
314 kMaxWaitMs);
315 }
316
317 // Test that the source ignores an optional aspect ratio that is higher than
318 // supported.
319 TEST_F(VideoSourceTest, OptionalAspectRatioTooHigh) {
320 FakeConstraints constraints;
321 constraints.AddOptional(MediaConstraintsInterface::kMinAspectRatio, 2);
322 CreateVideoSource(&constraints);
323 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
324 kMaxWaitMs);
325 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
326 ASSERT_TRUE(format != NULL);
327 double aspect_ratio = static_cast<double>(format->width) / format->height;
328 EXPECT_LT(aspect_ratio, 2);
329 }
330
331 // Test that the source starts video with the default resolution if the
332 // camera doesn't support capability enumeration and there are no constraints.
333 TEST_F(VideoSourceTest, NoCameraCapability) {
334 capturer_->TestWithoutCameraFormats();
335
336 CreateVideoSource();
337 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
338 kMaxWaitMs);
339 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
340 ASSERT_TRUE(format != NULL);
341 EXPECT_EQ(640, format->width);
342 EXPECT_EQ(480, format->height);
343 EXPECT_EQ(30, format->framerate());
344 }
345
346 // Test that the source can start the video and get the requested aspect ratio
347 // if the camera doesn't support capability enumeration and the aspect ratio is
348 // set.
349 TEST_F(VideoSourceTest, NoCameraCapability16To9Ratio) {
350 capturer_->TestWithoutCameraFormats();
351
352 FakeConstraints constraints;
353 double requested_aspect_ratio = 640.0 / 360;
354 constraints.AddMandatory(MediaConstraintsInterface::kMinWidth, 640);
355 constraints.AddMandatory(MediaConstraintsInterface::kMinAspectRatio,
356 requested_aspect_ratio);
357
358 CreateVideoSource(&constraints);
359 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
360 kMaxWaitMs);
361 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
362 double aspect_ratio = static_cast<double>(format->width) / format->height;
363 EXPECT_LE(requested_aspect_ratio, aspect_ratio);
364 }
365
366 // Test that the source state transitions to kEnded if an unknown mandatory
367 // constraint is found.
368 TEST_F(VideoSourceTest, InvalidMandatoryConstraint) {
369 FakeConstraints constraints;
370 constraints.AddMandatory("weird key", 640);
371
372 CreateVideoSource(&constraints);
373 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
374 kMaxWaitMs);
375 }
376
377 // Test that the source ignores an unknown optional constraint.
378 TEST_F(VideoSourceTest, InvalidOptionalConstraint) {
379 FakeConstraints constraints;
380 constraints.AddOptional("weird key", 640);
381
382 CreateVideoSource(&constraints);
383 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
384 kMaxWaitMs);
385 }
386
387 TEST_F(VideoSourceTest, SetValidOptionValues) {
388 FakeConstraints constraints;
389 constraints.AddMandatory(MediaConstraintsInterface::kNoiseReduction, "false");
390
391 CreateVideoSource(&constraints);
392
393 EXPECT_EQ(rtc::Optional<bool>(false),
394 source_->options()->video_noise_reduction);
395 }
396
397 TEST_F(VideoSourceTest, OptionNotSet) {
398 FakeConstraints constraints;
399 CreateVideoSource(&constraints);
400 EXPECT_EQ(rtc::Optional<bool>(), source_->options()->video_noise_reduction);
401 }
402
403 TEST_F(VideoSourceTest, MandatoryOptionOverridesOptional) {
404 FakeConstraints constraints;
405 constraints.AddMandatory(
406 MediaConstraintsInterface::kNoiseReduction, true);
407 constraints.AddOptional(
408 MediaConstraintsInterface::kNoiseReduction, false);
409
410 CreateVideoSource(&constraints);
411
412 EXPECT_EQ(rtc::Optional<bool>(true),
413 source_->options()->video_noise_reduction);
414 }
415
416 TEST_F(VideoSourceTest, InvalidOptionKeyOptional) {
417 FakeConstraints constraints;
418 constraints.AddOptional(
419 MediaConstraintsInterface::kNoiseReduction, false);
420 constraints.AddOptional("invalidKey", false);
421
422 CreateVideoSource(&constraints);
423
424 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
425 kMaxWaitMs);
426 EXPECT_EQ(rtc::Optional<bool>(false),
427 source_->options()->video_noise_reduction);
428 }
429
430 TEST_F(VideoSourceTest, InvalidOptionKeyMandatory) {
431 FakeConstraints constraints;
432 constraints.AddMandatory(
433 MediaConstraintsInterface::kNoiseReduction, false);
434 constraints.AddMandatory("invalidKey", false);
435
436 CreateVideoSource(&constraints);
437
438 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
439 kMaxWaitMs);
440 EXPECT_EQ(rtc::Optional<bool>(), source_->options()->video_noise_reduction);
441 }
442
443 TEST_F(VideoSourceTest, InvalidOptionValueOptional) {
444 FakeConstraints constraints;
445 constraints.AddOptional(
446 MediaConstraintsInterface::kNoiseReduction, "not a boolean");
447
448 CreateVideoSource(&constraints);
449
450 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
451 kMaxWaitMs);
452 EXPECT_EQ(rtc::Optional<bool>(), source_->options()->video_noise_reduction);
453 }
454
455 TEST_F(VideoSourceTest, InvalidOptionValueMandatory) {
456 FakeConstraints constraints;
457 // Optional constraints should be ignored if the mandatory constraints fail.
458 constraints.AddOptional(
459 MediaConstraintsInterface::kNoiseReduction, "false");
460 // Values are case-sensitive and must be all lower-case.
461 constraints.AddMandatory(
462 MediaConstraintsInterface::kNoiseReduction, "True");
463
464 CreateVideoSource(&constraints);
465
466 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
467 kMaxWaitMs);
468 EXPECT_EQ(rtc::Optional<bool>(), source_->options()->video_noise_reduction);
469 }
470
471 TEST_F(VideoSourceTest, MixedOptionsAndConstraints) {
472 FakeConstraints constraints;
473 constraints.AddMandatory(MediaConstraintsInterface::kMaxWidth, 352);
474 constraints.AddMandatory(MediaConstraintsInterface::kMaxHeight, 288);
475 constraints.AddOptional(MediaConstraintsInterface::kMaxFrameRate, 5);
476
477 constraints.AddMandatory(
478 MediaConstraintsInterface::kNoiseReduction, false);
479 constraints.AddOptional(
480 MediaConstraintsInterface::kNoiseReduction, true);
481
482 CreateVideoSource(&constraints);
483 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
484 kMaxWaitMs);
485 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
486 ASSERT_TRUE(format != NULL);
487 EXPECT_EQ(352, format->width);
488 EXPECT_EQ(288, format->height);
489 EXPECT_EQ(30, format->framerate());
490
491 EXPECT_EQ(rtc::Optional<bool>(false),
492 source_->options()->video_noise_reduction);
493 }
494
495 // Tests that the source starts video with the default resolution for
496 // screencast if no constraint is set.
497 TEST_F(VideoSourceTest, ScreencastResolutionNoConstraint) {
498 capturer_->TestWithoutCameraFormats();
499 capturer_->SetScreencast(true);
500
501 CreateVideoSource();
502 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
503 kMaxWaitMs);
504 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
505 ASSERT_TRUE(format != NULL);
506 EXPECT_EQ(640, format->width);
507 EXPECT_EQ(480, format->height);
508 EXPECT_EQ(30, format->framerate());
509 }
510
511 // Tests that the source starts video with the max width and height set by
512 // constraints for screencast.
513 TEST_F(VideoSourceTest, ScreencastResolutionWithConstraint) {
514 FakeConstraints constraints;
515 constraints.AddMandatory(MediaConstraintsInterface::kMaxWidth, 480);
516 constraints.AddMandatory(MediaConstraintsInterface::kMaxHeight, 270);
517
518 capturer_->TestWithoutCameraFormats();
519 capturer_->SetScreencast(true);
520
521 CreateVideoSource(&constraints);
522 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
523 kMaxWaitMs);
524 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
525 ASSERT_TRUE(format != NULL);
526 EXPECT_EQ(480, format->width);
527 EXPECT_EQ(270, format->height);
528 EXPECT_EQ(30, format->framerate());
529 }
530
531 TEST_F(VideoSourceTest, MandatorySubOneFpsConstraints) {
532 FakeConstraints constraints;
533 constraints.AddMandatory(MediaConstraintsInterface::kMaxFrameRate, 0.5);
534
535 CreateVideoSource(&constraints);
536 EXPECT_EQ_WAIT(MediaSourceInterface::kEnded, state_observer_->state(),
537 kMaxWaitMs);
538 ASSERT_TRUE(capturer_->GetCaptureFormat() == NULL);
539 }
540
541 TEST_F(VideoSourceTest, OptionalSubOneFpsConstraints) {
542 FakeConstraints constraints;
543 constraints.AddOptional(MediaConstraintsInterface::kMaxFrameRate, 0.5);
544
545 CreateVideoSource(&constraints);
546 EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
547 kMaxWaitMs);
548 const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
549 ASSERT_TRUE(format != NULL);
550 EXPECT_EQ(30, format->framerate());
551 }
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