src/content/browser/media/capture/web_contents_video_capture_device_unittest.cc

   1 // Copyright (c) 2012 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 "content/browser/media/capture/web_contents_video_capture_device.h"
   6
   7 #include "base/bind_helpers.h"
   8 #include "base/debug/debugger.h"
   9 #include "base/run_loop.h"
  10 #include "base/test/test_timeouts.h"
  11 #include "base/time/time.h"
  12 #include "base/timer/timer.h"
  13 #include "content/browser/browser_thread_impl.h"
  14 #include "content/browser/media/capture/video_capture_oracle.h"
  15 #include "content/browser/media/capture/web_contents_capture_util.h"
  16 #include "content/browser/renderer_host/media/video_capture_buffer_pool.h"
  17 #include "content/browser/renderer_host/render_view_host_factory.h"
  18 #include "content/browser/renderer_host/render_widget_host_impl.h"
  19 #include "content/public/browser/notification_service.h"
  20 #include "content/public/browser/notification_types.h"
  21 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
  22 #include "content/public/test/mock_render_process_host.h"
  23 #include "content/public/test/test_browser_context.h"
  24 #include "content/public/test/test_browser_thread_bundle.h"
  25 #include "content/public/test/test_utils.h"
  26 #include "content/test/test_render_view_host.h"
  27 #include "content/test/test_web_contents.h"
  28 #include "media/base/video_frame.h"
  29 #include "media/base/video_util.h"
  30 #include "media/base/yuv_convert.h"
  31 #include "media/video/capture/video_capture_types.h"
  32 #include "skia/ext/platform_canvas.h"
  33 #include "testing/gtest/include/gtest/gtest.h"
  34 #include "third_party/skia/include/core/SkColor.h"
  35 #include "ui/gfx/display.h"
  36 #include "ui/gfx/screen.h"
  37
  38 namespace content {
  39 namespace {
  40
  41 const int kTestWidth = 320;
  42 const int kTestHeight = 240;
  43 const int kTestFramesPerSecond = 20;
  44 const float kTestDeviceScaleFactor = 2.0f;
  45 const SkColor kNothingYet = 0xdeadbeef;
  46 const SkColor kNotInterested = ~kNothingYet;
  47
  48 void DeadlineExceeded(base::Closure quit_closure) {
  49   if (!base::debug::BeingDebugged()) {
  50     quit_closure.Run();
  51     FAIL() << "Deadline exceeded while waiting, quitting";
  52   } else {
  53     LOG(WARNING) << "Deadline exceeded; test would fail if debugger weren't "
  54                  << "attached.";
  55   }
  56 }
  57
  58 void RunCurrentLoopWithDeadline() {
  59   base::Timer deadline(false, false);
  60   deadline.Start(FROM_HERE, TestTimeouts::action_max_timeout(), base::Bind(
  61       &DeadlineExceeded, base::MessageLoop::current()->QuitClosure()));
  62   base::MessageLoop::current()->Run();
  63   deadline.Stop();
  64 }
  65
  66 SkColor ConvertRgbToYuv(SkColor rgb) {
  67   uint8 yuv[3];
  68   media::ConvertRGB32ToYUV(reinterpret_cast<uint8*>(&rgb),
  69                            yuv, yuv + 1, yuv + 2, 1, 1, 1, 1, 1);
  70   return SkColorSetRGB(yuv[0], yuv[1], yuv[2]);
  71 }
  72
  73 // Thread-safe class that controls the source pattern to be captured by the
  74 // system under test. The lifetime of this class is greater than the lifetime
  75 // of all objects that reference it, so it does not need to be reference
  76 // counted.
  77 class CaptureTestSourceController {
  78  public:
  79
  80   CaptureTestSourceController()
  81       : color_(SK_ColorMAGENTA),
  82         copy_result_size_(kTestWidth, kTestHeight),
  83         can_copy_to_video_frame_(false),
  84         use_frame_subscriber_(false) {}
  85
  86   void SetSolidColor(SkColor color) {
  87     base::AutoLock guard(lock_);
  88     color_ = color;
  89   }
  90
  91   SkColor GetSolidColor() {
  92     base::AutoLock guard(lock_);
  93     return color_;
  94   }
  95
  96   void SetCopyResultSize(int width, int height) {
  97     base::AutoLock guard(lock_);
  98     copy_result_size_ = gfx::Size(width, height);
  99   }
 100
 101   gfx::Size GetCopyResultSize() {
 102     base::AutoLock guard(lock_);
 103     return copy_result_size_;
 104   }
 105
 106   void SignalCopy() {
 107     // TODO(nick): This actually should always be happening on the UI thread.
 108     base::AutoLock guard(lock_);
 109     if (!copy_done_.is_null()) {
 110       BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, copy_done_);
 111       copy_done_.Reset();
 112     }
 113   }
 114
 115   void SetCanCopyToVideoFrame(bool value) {
 116     base::AutoLock guard(lock_);
 117     can_copy_to_video_frame_ = value;
 118   }
 119
 120   bool CanCopyToVideoFrame() {
 121     base::AutoLock guard(lock_);
 122     return can_copy_to_video_frame_;
 123   }
 124
 125   void SetUseFrameSubscriber(bool value) {
 126     base::AutoLock guard(lock_);
 127     use_frame_subscriber_ = value;
 128   }
 129
 130   bool CanUseFrameSubscriber() {
 131     base::AutoLock guard(lock_);
 132     return use_frame_subscriber_;
 133   }
 134
 135   void WaitForNextCopy() {
 136     {
 137       base::AutoLock guard(lock_);
 138       copy_done_ = base::MessageLoop::current()->QuitClosure();
 139     }
 140
 141     RunCurrentLoopWithDeadline();
 142   }
 143
 144  private:
 145   base::Lock lock_;  // Guards changes to all members.
 146   SkColor color_;
 147   gfx::Size copy_result_size_;
 148   bool can_copy_to_video_frame_;
 149   bool use_frame_subscriber_;
 150   base::Closure copy_done_;
 151
 152   DISALLOW_COPY_AND_ASSIGN(CaptureTestSourceController);
 153 };
 154
 155 // A stub implementation which returns solid-color bitmaps in calls to
 156 // CopyFromCompositingSurfaceToVideoFrame(), and which allows the video-frame
 157 // readback path to be switched on and off. The behavior is controlled by a
 158 // CaptureTestSourceController.
 159 class CaptureTestView : public TestRenderWidgetHostView {
 160  public:
 161   explicit CaptureTestView(RenderWidgetHostImpl* rwh,
 162                            CaptureTestSourceController* controller)
 163       : TestRenderWidgetHostView(rwh),
 164         controller_(controller) {}
 165
 166   ~CaptureTestView() override {}
 167
 168   // TestRenderWidgetHostView overrides.
 169   gfx::Rect GetViewBounds() const override {
 170     return gfx::Rect(100, 100, 100 + kTestWidth, 100 + kTestHeight);
 171   }
 172
 173   bool CanCopyToVideoFrame() const override {
 174     return controller_->CanCopyToVideoFrame();
 175   }
 176
 177   void CopyFromCompositingSurfaceToVideoFrame(
 178       const gfx::Rect& src_subrect,
 179       const scoped_refptr<media::VideoFrame>& target,
 180       const base::Callback<void(bool)>& callback) override {
 181     SkColor c = ConvertRgbToYuv(controller_->GetSolidColor());
 182     media::FillYUV(
 183         target.get(), SkColorGetR(c), SkColorGetG(c), SkColorGetB(c));
 184     callback.Run(true);
 185     controller_->SignalCopy();
 186   }
 187
 188   void BeginFrameSubscription(
 189       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override {
 190     subscriber_.reset(subscriber.release());
 191   }
 192
 193   void EndFrameSubscription() override { subscriber_.reset(); }
 194
 195   // Simulate a compositor paint event for our subscriber.
 196   void SimulateUpdate() {
 197     const base::TimeTicks present_time = base::TimeTicks::Now();
 198     RenderWidgetHostViewFrameSubscriber::DeliverFrameCallback callback;
 199     scoped_refptr<media::VideoFrame> target;
 200     if (subscriber_ && subscriber_->ShouldCaptureFrame(
 201             gfx::Rect(), present_time, &target, &callback)) {
 202       SkColor c = ConvertRgbToYuv(controller_->GetSolidColor());
 203       media::FillYUV(
 204           target.get(), SkColorGetR(c), SkColorGetG(c), SkColorGetB(c));
 205       BrowserThread::PostTask(BrowserThread::UI,
 206                               FROM_HERE,
 207                               base::Bind(callback, present_time, true));
 208       controller_->SignalCopy();
 209     }
 210   }
 211
 212  private:
 213   scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber_;
 214   CaptureTestSourceController* const controller_;
 215
 216   DISALLOW_IMPLICIT_CONSTRUCTORS(CaptureTestView);
 217 };
 218
 219 #if defined(COMPILER_MSVC)
 220 // MSVC warns on diamond inheritance. See comment for same warning on
 221 // RenderViewHostImpl.
 222 #pragma warning(push)
 223 #pragma warning(disable: 4250)
 224 #endif
 225
 226 // A stub implementation which returns solid-color bitmaps in calls to
 227 // CopyFromBackingStore(). The behavior is controlled by a
 228 // CaptureTestSourceController.
 229 class CaptureTestRenderViewHost : public TestRenderViewHost {
 230  public:
 231   CaptureTestRenderViewHost(SiteInstance* instance,
 232                             RenderViewHostDelegate* delegate,
 233                             RenderWidgetHostDelegate* widget_delegate,
 234                             int routing_id,
 235                             int main_frame_routing_id,
 236                             bool swapped_out,
 237                             CaptureTestSourceController* controller)
 238       : TestRenderViewHost(instance, delegate, widget_delegate, routing_id,
 239                            main_frame_routing_id, swapped_out),
 240         controller_(controller) {
 241     // Override the default view installed by TestRenderViewHost; we need
 242     // our special subclass which has mocked-out tab capture support.
 243     RenderWidgetHostView* old_view = GetView();
 244     SetView(new CaptureTestView(this, controller));
 245     delete old_view;
 246   }
 247
 248   // TestRenderViewHost overrides.
 249   void CopyFromBackingStore(
 250       const gfx::Rect& src_rect,
 251       const gfx::Size& accelerated_dst_size,
 252       const base::Callback<void(bool, const SkBitmap&)>& callback,
 253       const SkColorType color_type) override {
 254     gfx::Size size = controller_->GetCopyResultSize();
 255     SkColor color = controller_->GetSolidColor();
 256
 257     // Although it's not necessary, use a PlatformBitmap here (instead of a
 258     // regular SkBitmap) to exercise possible threading issues.
 259     skia::PlatformBitmap output;
 260     EXPECT_TRUE(output.Allocate(size.width(), size.height(), false));
 261     {
 262       SkAutoLockPixels locker(output.GetBitmap());
 263       output.GetBitmap().eraseColor(color);
 264     }
 265     callback.Run(true, output.GetBitmap());
 266     controller_->SignalCopy();
 267   }
 268
 269  private:
 270   CaptureTestSourceController* controller_;
 271
 272   DISALLOW_IMPLICIT_CONSTRUCTORS(CaptureTestRenderViewHost);
 273 };
 274
 275 #if defined(COMPILER_MSVC)
 276 // Re-enable warning 4250
 277 #pragma warning(pop)
 278 #endif
 279
 280 class CaptureTestRenderViewHostFactory : public RenderViewHostFactory {
 281  public:
 282   explicit CaptureTestRenderViewHostFactory(
 283       CaptureTestSourceController* controller) : controller_(controller) {
 284     RegisterFactory(this);
 285   }
 286
 287   ~CaptureTestRenderViewHostFactory() override { UnregisterFactory(); }
 288
 289   // RenderViewHostFactory implementation.
 290   RenderViewHost* CreateRenderViewHost(
 291       SiteInstance* instance,
 292       RenderViewHostDelegate* delegate,
 293       RenderWidgetHostDelegate* widget_delegate,
 294       int routing_id,
 295       int main_frame_routing_id,
 296       bool swapped_out) override {
 297     return new CaptureTestRenderViewHost(instance, delegate, widget_delegate,
 298                                          routing_id, main_frame_routing_id,
 299                                          swapped_out, controller_);
 300   }
 301  private:
 302   CaptureTestSourceController* controller_;
 303
 304   DISALLOW_IMPLICIT_CONSTRUCTORS(CaptureTestRenderViewHostFactory);
 305 };
 306
 307 // A stub consumer of captured video frames, which checks the output of
 308 // WebContentsVideoCaptureDevice.
 309 class StubClient : public media::VideoCaptureDevice::Client {
 310  public:
 311   StubClient(const base::Callback<void(SkColor)>& color_callback,
 312              const base::Closure& error_callback)
 313       : color_callback_(color_callback),
 314         error_callback_(error_callback) {
 315     buffer_pool_ = new VideoCaptureBufferPool(2);
 316   }
 317   ~StubClient() override {}
 318
 319   scoped_refptr<media::VideoCaptureDevice::Client::Buffer> ReserveOutputBuffer(
 320       media::VideoFrame::Format format,
 321       const gfx::Size& dimensions) override {
 322     CHECK_EQ(format, media::VideoFrame::I420);
 323     const size_t frame_bytes =
 324         media::VideoFrame::AllocationSize(media::VideoFrame::I420, dimensions);
 325     int buffer_id_to_drop = VideoCaptureBufferPool::kInvalidId;  // Ignored.
 326     int buffer_id =
 327         buffer_pool_->ReserveForProducer(frame_bytes, &buffer_id_to_drop);
 328     if (buffer_id == VideoCaptureBufferPool::kInvalidId)
 329       return NULL;
 330     void* data;
 331     size_t size;
 332     buffer_pool_->GetBufferInfo(buffer_id, &data, &size);
 333     return scoped_refptr<media::VideoCaptureDevice::Client::Buffer>(
 334         new PoolBuffer(buffer_pool_, buffer_id, data, size));
 335   }
 336
 337   void OnIncomingCapturedData(const uint8* data,
 338                               int length,
 339                               const media::VideoCaptureFormat& frame_format,
 340                               int rotation,
 341                               base::TimeTicks timestamp) override {
 342     FAIL();
 343   }
 344
 345   void OnIncomingCapturedVideoFrame(
 346       const scoped_refptr<Buffer>& buffer,
 347       const media::VideoCaptureFormat& buffer_format,
 348       const scoped_refptr<media::VideoFrame>& frame,
 349       base::TimeTicks timestamp) override {
 350     EXPECT_EQ(gfx::Size(kTestWidth, kTestHeight), buffer_format.frame_size);
 351     EXPECT_EQ(media::PIXEL_FORMAT_I420, buffer_format.pixel_format);
 352     EXPECT_EQ(media::VideoFrame::I420, frame->format());
 353     uint8 yuv[3];
 354     for (int plane = 0; plane < 3; ++plane)
 355       yuv[plane] = frame->data(plane)[0];
 356     // TODO(nick): We just look at the first pixel presently, because if
 357     // the analysis is too slow, the backlog of frames will grow without bound
 358     // and trouble erupts. http://crbug.com/174519
 359     color_callback_.Run((SkColorSetRGB(yuv[0], yuv[1], yuv[2])));
 360   }
 361
 362   void OnError(const std::string& reason) override { error_callback_.Run(); }
 363
 364  private:
 365   class PoolBuffer : public media::VideoCaptureDevice::Client::Buffer {
 366    public:
 367     PoolBuffer(const scoped_refptr<VideoCaptureBufferPool>& pool,
 368                int buffer_id,
 369                void* data,
 370                size_t size)
 371         : Buffer(buffer_id, data, size), pool_(pool) {}
 372
 373    private:
 374     ~PoolBuffer() override { pool_->RelinquishProducerReservation(id()); }
 375     const scoped_refptr<VideoCaptureBufferPool> pool_;
 376   };
 377
 378   scoped_refptr<VideoCaptureBufferPool> buffer_pool_;
 379   base::Callback<void(SkColor)> color_callback_;
 380   base::Closure error_callback_;
 381
 382   DISALLOW_COPY_AND_ASSIGN(StubClient);
 383 };
 384
 385 class StubClientObserver {
 386  public:
 387   StubClientObserver()
 388       : error_encountered_(false),
 389         wait_color_yuv_(0xcafe1950) {
 390     client_.reset(new StubClient(
 391         base::Bind(&StubClientObserver::OnColor, base::Unretained(this)),
 392         base::Bind(&StubClientObserver::OnError, base::Unretained(this))));
 393   }
 394
 395   virtual ~StubClientObserver() {}
 396
 397   scoped_ptr<media::VideoCaptureDevice::Client> PassClient() {
 398     return client_.Pass();
 399   }
 400
 401   void QuitIfConditionMet(SkColor color) {
 402     base::AutoLock guard(lock_);
 403     if (wait_color_yuv_ == color || error_encountered_)
 404       base::MessageLoop::current()->Quit();
 405   }
 406
 407   void WaitForNextColor(SkColor expected_color) {
 408     {
 409       base::AutoLock guard(lock_);
 410       wait_color_yuv_ = ConvertRgbToYuv(expected_color);
 411       error_encountered_ = false;
 412     }
 413     RunCurrentLoopWithDeadline();
 414     {
 415       base::AutoLock guard(lock_);
 416       ASSERT_FALSE(error_encountered_);
 417     }
 418   }
 419
 420   void WaitForError() {
 421     {
 422       base::AutoLock guard(lock_);
 423       wait_color_yuv_ = kNotInterested;
 424       error_encountered_ = false;
 425     }
 426     RunCurrentLoopWithDeadline();
 427     {
 428       base::AutoLock guard(lock_);
 429       ASSERT_TRUE(error_encountered_);
 430     }
 431   }
 432
 433   bool HasError() {
 434     base::AutoLock guard(lock_);
 435     return error_encountered_;
 436   }
 437
 438   void OnError() {
 439     {
 440       base::AutoLock guard(lock_);
 441       error_encountered_ = true;
 442     }
 443     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
 444         &StubClientObserver::QuitIfConditionMet,
 445         base::Unretained(this),
 446         kNothingYet));
 447   }
 448
 449   void OnColor(SkColor color) {
 450     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
 451         &StubClientObserver::QuitIfConditionMet,
 452         base::Unretained(this),
 453         color));
 454   }
 455
 456  private:
 457   base::Lock lock_;
 458   bool error_encountered_;
 459   SkColor wait_color_yuv_;
 460   scoped_ptr<StubClient> client_;
 461
 462   DISALLOW_COPY_AND_ASSIGN(StubClientObserver);
 463 };
 464
 465 // A dummy implementation of gfx::Screen, since WebContentsVideoCaptureDevice
 466 // needs access to a gfx::Display's device scale factor.
 467 class FakeScreen : public gfx::Screen {
 468  public:
 469   FakeScreen() : the_one_display_(0x1337, gfx::Rect(0, 0, 2560, 1440)) {
 470     the_one_display_.set_device_scale_factor(kTestDeviceScaleFactor);
 471   }
 472   ~FakeScreen() override {}
 473
 474   // gfx::Screen implementation (only what's needed for testing).
 475   gfx::Point GetCursorScreenPoint() override { return gfx::Point(); }
 476   gfx::NativeWindow GetWindowUnderCursor() override { return NULL; }
 477   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override {
 478     return NULL;
 479   }
 480   int GetNumDisplays() const override { return 1; }
 481   std::vector<gfx::Display> GetAllDisplays() const override {
 482     return std::vector<gfx::Display>(1, the_one_display_);
 483   }
 484   gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override {
 485     return the_one_display_;
 486   }
 487   gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override {
 488     return the_one_display_;
 489   }
 490   gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override {
 491     return the_one_display_;
 492   }
 493   gfx::Display GetPrimaryDisplay() const override { return the_one_display_; }
 494   void AddObserver(gfx::DisplayObserver* observer) override {}
 495   void RemoveObserver(gfx::DisplayObserver* observer) override {}
 496
 497  private:
 498   gfx::Display the_one_display_;
 499
 500   DISALLOW_COPY_AND_ASSIGN(FakeScreen);
 501 };
 502
 503 // Test harness that sets up a minimal environment with necessary stubs.
 504 class WebContentsVideoCaptureDeviceTest : public testing::Test {
 505  public:
 506   // This is public because C++ method pointer scoping rules are silly and make
 507   // this hard to use with Bind().
 508   void ResetWebContents() {
 509     web_contents_.reset();
 510   }
 511
 512  protected:
 513   void SetUp() override {
 514     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, &fake_screen_);
 515     ASSERT_EQ(&fake_screen_, gfx::Screen::GetNativeScreen());
 516
 517     // TODO(nick): Sadness and woe! Much "mock-the-world" boilerplate could be
 518     // eliminated here, if only we could use RenderViewHostTestHarness. The
 519     // catch is that we need our TestRenderViewHost to support a
 520     // CopyFromBackingStore operation that we control. To accomplish that,
 521     // either RenderViewHostTestHarness would have to support installing a
 522     // custom RenderViewHostFactory, or else we implant some kind of delegated
 523     // CopyFromBackingStore functionality into TestRenderViewHost itself.
 524
 525     render_process_host_factory_.reset(new MockRenderProcessHostFactory());
 526     // Create our (self-registering) RVH factory, so that when we create a
 527     // WebContents, it in turn creates CaptureTestRenderViewHosts.
 528     render_view_host_factory_.reset(
 529         new CaptureTestRenderViewHostFactory(&controller_));
 530
 531     browser_context_.reset(new TestBrowserContext());
 532
 533     scoped_refptr<SiteInstance> site_instance =
 534         SiteInstance::Create(browser_context_.get());
 535     SiteInstanceImpl::set_render_process_host_factory(
 536         render_process_host_factory_.get());
 537     web_contents_.reset(
 538         TestWebContents::Create(browser_context_.get(), site_instance.get()));
 539     RenderFrameHost* const main_frame = web_contents_->GetMainFrame();
 540     device_.reset(WebContentsVideoCaptureDevice::Create(
 541         base::StringPrintf("web-contents-media-stream://%d:%d",
 542                            main_frame->GetProcess()->GetID(),
 543                            main_frame->GetRoutingID())));
 544
 545     base::RunLoop().RunUntilIdle();
 546   }
 547
 548   void TearDown() override {
 549     // Tear down in opposite order of set-up.
 550
 551     // The device is destroyed asynchronously, and will notify the
 552     // CaptureTestSourceController when it finishes destruction.
 553     // Trigger this, and wait.
 554     if (device_) {
 555       device_->StopAndDeAllocate();
 556       device_.reset();
 557     }
 558
 559     base::RunLoop().RunUntilIdle();
 560
 561     // Destroy the browser objects.
 562     web_contents_.reset();
 563     browser_context_.reset();
 564
 565     base::RunLoop().RunUntilIdle();
 566
 567     SiteInstanceImpl::set_render_process_host_factory(NULL);
 568     render_view_host_factory_.reset();
 569     render_process_host_factory_.reset();
 570
 571     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, NULL);
 572   }
 573
 574   // Accessors.
 575   CaptureTestSourceController* source() { return &controller_; }
 576   WebContents* web_contents() const { return web_contents_.get(); }
 577   media::VideoCaptureDevice* device() { return device_.get(); }
 578
 579   void SimulateDrawEvent() {
 580     if (source()->CanUseFrameSubscriber()) {
 581       // Print
 582       CaptureTestView* test_view = static_cast<CaptureTestView*>(
 583           web_contents_->GetRenderViewHost()->GetView());
 584       test_view->SimulateUpdate();
 585     } else {
 586       // Simulate a non-accelerated paint.
 587       NotificationService::current()->Notify(
 588           NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
 589           Source<RenderWidgetHost>(web_contents_->GetRenderViewHost()),
 590           NotificationService::NoDetails());
 591     }
 592   }
 593
 594   void DestroyVideoCaptureDevice() { device_.reset(); }
 595
 596   StubClientObserver* client_observer() {
 597     return &client_observer_;
 598   }
 599
 600  private:
 601   FakeScreen fake_screen_;
 602
 603   StubClientObserver client_observer_;
 604
 605   // The controller controls which pixel patterns to produce.
 606   CaptureTestSourceController controller_;
 607
 608   // Self-registering RenderProcessHostFactory.
 609   scoped_ptr<MockRenderProcessHostFactory> render_process_host_factory_;
 610
 611   // Creates capture-capable RenderViewHosts whose pixel content production is
 612   // under the control of |controller_|.
 613   scoped_ptr<CaptureTestRenderViewHostFactory> render_view_host_factory_;
 614
 615   // A mocked-out browser and tab.
 616   scoped_ptr<TestBrowserContext> browser_context_;
 617   scoped_ptr<WebContents> web_contents_;
 618
 619   // Finally, the WebContentsVideoCaptureDevice under test.
 620   scoped_ptr<media::VideoCaptureDevice> device_;
 621
 622   TestBrowserThreadBundle thread_bundle_;
 623 };
 624
 625 TEST_F(WebContentsVideoCaptureDeviceTest, InvalidInitialWebContentsError) {
 626   // Before the installs itself on the UI thread up to start capturing, we'll
 627   // delete the web contents. This should trigger an error which can happen in
 628   // practice; we should be able to recover gracefully.
 629   ResetWebContents();
 630
 631   media::VideoCaptureParams capture_params;
 632   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 633   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 634   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 635   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 636   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForError());
 637   device()->StopAndDeAllocate();
 638 }
 639
 640 TEST_F(WebContentsVideoCaptureDeviceTest, WebContentsDestroyed) {
 641   const gfx::Size capture_preferred_size(
 642       static_cast<int>(kTestWidth / kTestDeviceScaleFactor),
 643       static_cast<int>(kTestHeight / kTestDeviceScaleFactor));
 644   ASSERT_NE(capture_preferred_size, web_contents()->GetPreferredSize());
 645
 646   // We'll simulate the tab being closed after the capture pipeline is up and
 647   // running.
 648   media::VideoCaptureParams capture_params;
 649   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 650   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 651   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 652   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 653   // Do one capture to prove
 654   source()->SetSolidColor(SK_ColorRED);
 655   SimulateDrawEvent();
 656   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorRED));
 657
 658   base::RunLoop().RunUntilIdle();
 659
 660   // Check that the preferred size of the WebContents matches the one provided
 661   // by WebContentsVideoCaptureDevice.
 662   EXPECT_EQ(capture_preferred_size, web_contents()->GetPreferredSize());
 663
 664   // Post a task to close the tab. We should see an error reported to the
 665   // consumer.
 666   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 667       base::Bind(&WebContentsVideoCaptureDeviceTest::ResetWebContents,
 668                  base::Unretained(this)));
 669   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForError());
 670   device()->StopAndDeAllocate();
 671 }
 672
 673 TEST_F(WebContentsVideoCaptureDeviceTest,
 674        StopDeviceBeforeCaptureMachineCreation) {
 675   media::VideoCaptureParams capture_params;
 676   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 677   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 678   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 679   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 680
 681   // Make a point of not running the UI messageloop here.
 682   device()->StopAndDeAllocate();
 683   DestroyVideoCaptureDevice();
 684
 685   // Currently, there should be CreateCaptureMachineOnUIThread() and
 686   // DestroyCaptureMachineOnUIThread() tasks pending on the current (UI) message
 687   // loop. These should both succeed without crashing, and the machine should
 688   // wind up in the idle state.
 689   base::RunLoop().RunUntilIdle();
 690 }
 691
 692 TEST_F(WebContentsVideoCaptureDeviceTest, StopWithRendererWorkToDo) {
 693   // Set up the test to use RGB copies and an normal
 694   source()->SetCanCopyToVideoFrame(false);
 695   source()->SetUseFrameSubscriber(false);
 696   media::VideoCaptureParams capture_params;
 697   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 698   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 699   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 700   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 701
 702   base::RunLoop().RunUntilIdle();
 703
 704   for (int i = 0; i < 10; ++i)
 705     SimulateDrawEvent();
 706
 707   ASSERT_FALSE(client_observer()->HasError());
 708   device()->StopAndDeAllocate();
 709   ASSERT_FALSE(client_observer()->HasError());
 710   base::RunLoop().RunUntilIdle();
 711   ASSERT_FALSE(client_observer()->HasError());
 712 }
 713
 714 TEST_F(WebContentsVideoCaptureDeviceTest, DeviceRestart) {
 715   media::VideoCaptureParams capture_params;
 716   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 717   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 718   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 719   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 720   base::RunLoop().RunUntilIdle();
 721   source()->SetSolidColor(SK_ColorRED);
 722   SimulateDrawEvent();
 723   SimulateDrawEvent();
 724   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorRED));
 725   SimulateDrawEvent();
 726   SimulateDrawEvent();
 727   source()->SetSolidColor(SK_ColorGREEN);
 728   SimulateDrawEvent();
 729   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorGREEN));
 730   device()->StopAndDeAllocate();
 731
 732   // Device is stopped, but content can still be animating.
 733   SimulateDrawEvent();
 734   SimulateDrawEvent();
 735   base::RunLoop().RunUntilIdle();
 736
 737   StubClientObserver observer2;
 738   device()->AllocateAndStart(capture_params, observer2.PassClient());
 739   source()->SetSolidColor(SK_ColorBLUE);
 740   SimulateDrawEvent();
 741   ASSERT_NO_FATAL_FAILURE(observer2.WaitForNextColor(SK_ColorBLUE));
 742   source()->SetSolidColor(SK_ColorYELLOW);
 743   SimulateDrawEvent();
 744   ASSERT_NO_FATAL_FAILURE(observer2.WaitForNextColor(SK_ColorYELLOW));
 745   device()->StopAndDeAllocate();
 746 }
 747
 748 // The "happy case" test.  No scaling is needed, so we should be able to change
 749 // the picture emitted from the source and expect to see each delivered to the
 750 // consumer. The test will alternate between the three capture paths, simulating
 751 // falling in and out of accelerated compositing.
 752 TEST_F(WebContentsVideoCaptureDeviceTest, GoesThroughAllTheMotions) {
 753   media::VideoCaptureParams capture_params;
 754   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 755   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 756   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 757   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 758
 759   for (int i = 0; i < 6; i++) {
 760     const char* name = NULL;
 761     switch (i % 3) {
 762       case 0:
 763         source()->SetCanCopyToVideoFrame(true);
 764         source()->SetUseFrameSubscriber(false);
 765         name = "VideoFrame";
 766         break;
 767       case 1:
 768         source()->SetCanCopyToVideoFrame(false);
 769         source()->SetUseFrameSubscriber(true);
 770         name = "Subscriber";
 771         break;
 772       case 2:
 773         source()->SetCanCopyToVideoFrame(false);
 774         source()->SetUseFrameSubscriber(false);
 775         name = "SkBitmap";
 776         break;
 777       default:
 778         FAIL();
 779     }
 780
 781     SCOPED_TRACE(base::StringPrintf("Using %s path, iteration #%d", name, i));
 782
 783     source()->SetSolidColor(SK_ColorRED);
 784     SimulateDrawEvent();
 785     ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorRED));
 786
 787     source()->SetSolidColor(SK_ColorGREEN);
 788     SimulateDrawEvent();
 789     ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorGREEN));
 790
 791     source()->SetSolidColor(SK_ColorBLUE);
 792     SimulateDrawEvent();
 793     ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorBLUE));
 794
 795     source()->SetSolidColor(SK_ColorBLACK);
 796     SimulateDrawEvent();
 797     ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorBLACK));
 798   }
 799   device()->StopAndDeAllocate();
 800 }
 801
 802 TEST_F(WebContentsVideoCaptureDeviceTest, RejectsInvalidAllocateParams) {
 803   media::VideoCaptureParams capture_params;
 804   capture_params.requested_format.frame_size.SetSize(1280, 720);
 805   capture_params.requested_format.frame_rate = -2;
 806   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 807   BrowserThread::PostTask(
 808       BrowserThread::UI,
 809       FROM_HERE,
 810       base::Bind(&media::VideoCaptureDevice::AllocateAndStart,
 811                  base::Unretained(device()),
 812                  capture_params,
 813                  base::Passed(client_observer()->PassClient())));
 814   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForError());
 815   BrowserThread::PostTask(
 816       BrowserThread::UI,
 817       FROM_HERE,
 818       base::Bind(&media::VideoCaptureDevice::StopAndDeAllocate,
 819                  base::Unretained(device())));
 820   base::RunLoop().RunUntilIdle();
 821 }
 822
 823 TEST_F(WebContentsVideoCaptureDeviceTest, BadFramesGoodFrames) {
 824   media::VideoCaptureParams capture_params;
 825   capture_params.requested_format.frame_size.SetSize(kTestWidth, kTestHeight);
 826   capture_params.requested_format.frame_rate = kTestFramesPerSecond;
 827   capture_params.requested_format.pixel_format = media::PIXEL_FORMAT_I420;
 828   // 1x1 is too small to process; we intend for this to result in an error.
 829   source()->SetCopyResultSize(1, 1);
 830   source()->SetSolidColor(SK_ColorRED);
 831   device()->AllocateAndStart(capture_params, client_observer()->PassClient());
 832
 833   // These frames ought to be dropped during the Render stage. Let
 834   // several captures to happen.
 835   ASSERT_NO_FATAL_FAILURE(source()->WaitForNextCopy());
 836   ASSERT_NO_FATAL_FAILURE(source()->WaitForNextCopy());
 837   ASSERT_NO_FATAL_FAILURE(source()->WaitForNextCopy());
 838   ASSERT_NO_FATAL_FAILURE(source()->WaitForNextCopy());
 839   ASSERT_NO_FATAL_FAILURE(source()->WaitForNextCopy());
 840
 841   // Now push some good frames through; they should be processed normally.
 842   source()->SetCopyResultSize(kTestWidth, kTestHeight);
 843   source()->SetSolidColor(SK_ColorGREEN);
 844   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorGREEN));
 845   source()->SetSolidColor(SK_ColorRED);
 846   ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorRED));
 847
 848   device()->StopAndDeAllocate();
 849 }
 850
 851 }  // namespace
 852 }  // namespace content