"Buttery Smooth" Tab Capture.

content/browser/renderer_host/media/video_capture_controller_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Unit test for VideoCaptureController.
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 94 matching lines @@
   VideoCaptureController* controller_;
 };
 
 // Test class.
 class VideoCaptureControllerTest : public testing::Test {
  public:
   VideoCaptureControllerTest() {}
   virtual ~VideoCaptureControllerTest() {}
 
  protected:
-  static const int kPoolSize = 3;
+  static const int kPoolSize = 5;
 
   virtual void SetUp() OVERRIDE {
     controller_.reset(new VideoCaptureController());
     device_ = controller_->NewDeviceClient().Pass();
     client_a_.reset(new MockVideoCaptureControllerEventHandler(
         controller_.get()));
     client_b_.reset(new MockVideoCaptureControllerEventHandler(
         controller_.get()));
   }
 
@@ skipping 261 matching lines @@
   Mock::VerifyAndClearExpectations(client_b_.get());
 
   // Add a fourth client now that some buffers have come through.
   controller_->AddClient(client_b_route_2,
                          client_b_.get(),
                          base::kNullProcessHandle,
                          1,
                          session_1);
   Mock::VerifyAndClearExpectations(client_b_.get());
 
-  // Third, fourth, and fifth buffers. Pretend they all arrive at the same time.
+  // Third through seventh buffers. Pretend they all arrive at the same time.
   for (int i = 0; i < kPoolSize; i++) {
     buffer = device_->ReserveOutputBuffer(media::VideoFrame::I420,
                                           capture_resolution);
     ASSERT_TRUE(buffer);
     memset(buffer->data(), buffer_no++, buffer->size());
     device_->OnIncomingCapturedVideoFrame(
         buffer,
         media::VideoCaptureFormat(capture_resolution,
                                   device_format.frame_rate,
                                   media::PIXEL_FORMAT_I420),
         WrapI420Buffer(buffer, capture_resolution),
         base::TimeTicks());
     buffer = NULL;
   }
   // ReserveOutputBuffer ought to fail now, because the pool is depleted.
   ASSERT_FALSE(device_->ReserveOutputBuffer(media::VideoFrame::I420,
                                             capture_resolution));
 
-  // The new client needs to be told of 3 buffers; the old clients only 2.
+  // The new client needs to be told of 5 buffers; the old clients only 4.
   EXPECT_CALL(*client_b_, DoBufferCreated(client_b_route_2)).Times(kPoolSize);
   EXPECT_CALL(*client_b_, DoBufferReady(client_b_route_2)).Times(kPoolSize);
   EXPECT_CALL(*client_a_, DoBufferCreated(client_a_route_1))
       .Times(kPoolSize - 1);
   EXPECT_CALL(*client_a_, DoBufferReady(client_a_route_1)).Times(kPoolSize);
   EXPECT_CALL(*client_a_, DoBufferCreated(client_a_route_2))
       .Times(kPoolSize - 1);
   EXPECT_CALL(*client_a_, DoBufferReady(client_a_route_2)).Times(kPoolSize);
   EXPECT_CALL(*client_b_, DoBufferCreated(client_b_route_1))
       .Times(kPoolSize - 1);
@@ skipping 207 matching lines @@
 
   // Second client connects after the error state. It also should get told of
   // the error.
   EXPECT_CALL(*client_b_, DoError(route_id)).Times(1);
   controller_->AddClient(
       route_id, client_b_.get(), base::kNullProcessHandle, 200, session_200);
   Mock::VerifyAndClearExpectations(client_b_.get());
 }
 
 }  // namespace content