webrtc/video_engine/vie_capturer_unittest.cc - platform/external/webrtc - Git at Google

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */

 // This file includes unit tests for ViECapturer.

 #include "webrtc/video_engine/vie_capturer.h"

 #include <vector>

 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common.h"
 #include "webrtc/modules/utility/interface/mock/mock_process_thread.h"
 #include "webrtc/modules/video_capture/include/mock/mock_video_capture.h"
 #include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/interface/event_wrapper.h"
 #include "webrtc/system_wrappers/interface/ref_count.h"
 #include "webrtc/system_wrappers/interface/scoped_vector.h"
 #include "webrtc/video_engine/mock/mock_vie_frame_provider_base.h"

 using ::testing::_;
 using ::testing::Invoke;
 using ::testing::NiceMock;
 using ::testing::Return;
 using ::testing::WithArg;

 // If an output frame does not arrive in 500ms, the test will fail.
 #define FRAME_TIMEOUT_MS 500

 namespace webrtc {

 bool EqualFrames(const I420VideoFrame& frame1,
                  const I420VideoFrame& frame2);
 bool EqualTextureFrames(const I420VideoFrame& frame1,
                         const I420VideoFrame& frame2);
 bool EqualBufferFrames(const I420VideoFrame& frame1,
                        const I420VideoFrame& frame2);
 bool EqualFramesVector(const ScopedVector<I420VideoFrame>& frames1,
                        const ScopedVector<I420VideoFrame>& frames2);
 I420VideoFrame* CreateI420VideoFrame(uint8_t length);

 class ViECapturerTest : public ::testing::Test {
  protected:
   ViECapturerTest()
       : mock_capture_module_(new NiceMock<MockVideoCaptureModule>()),
         mock_process_thread_(new NiceMock<MockProcessThread>),
         mock_frame_callback_(new NiceMock<MockViEFrameCallback>),
         data_callback_(NULL),
         output_frame_event_(EventWrapper::Create()) {
   }

   virtual void SetUp() {
     EXPECT_CALL(*mock_capture_module_, RegisterCaptureDataCallback(_))
         .WillRepeatedly(Invoke(this, &ViECapturerTest::SetCaptureDataCallback));
     EXPECT_CALL(*mock_frame_callback_, DeliverFrame(_, _, _))
         .WillRepeatedly(
             WithArg<1>(Invoke(this, &ViECapturerTest::AddOutputFrame)));

     Config config;
     vie_capturer_.reset(
         ViECapturer::CreateViECapture(
             0, 0, config, mock_capture_module_.get(), *mock_process_thread_));
     vie_capturer_->RegisterFrameCallback(0, mock_frame_callback_.get());
   }

   virtual void TearDown() {
     vie_capturer_->DeregisterFrameCallback(mock_frame_callback_.get());
     // ViECapturer accesses |mock_process_thread_| in destructor and should
     // be deleted first.
     vie_capturer_.reset();
   }

   void SetCaptureDataCallback(VideoCaptureDataCallback& data_callback) {
     data_callback_ = &data_callback;
   }

   void AddInputFrame(I420VideoFrame* frame) {
     data_callback_->OnIncomingCapturedFrame(0, *frame);
   }

   void AddOutputFrame(const I420VideoFrame& frame) {
     if (frame.native_handle() == NULL)
       output_frame_ybuffers_.push_back(frame.buffer(kYPlane));
     output_frames_.push_back(new I420VideoFrame(frame));
     output_frame_event_->Set();
   }

   void WaitOutputFrame() {
     EXPECT_EQ(kEventSignaled, output_frame_event_->Wait(FRAME_TIMEOUT_MS));
   }

   rtc::scoped_ptr<MockVideoCaptureModule> mock_capture_module_;
   rtc::scoped_ptr<MockProcessThread> mock_process_thread_;
   rtc::scoped_ptr<MockViEFrameCallback> mock_frame_callback_;

   // Used to send input capture frames to ViECapturer.
   VideoCaptureDataCallback* data_callback_;

   rtc::scoped_ptr<ViECapturer> vie_capturer_;

   // Input capture frames of ViECapturer.
   ScopedVector<I420VideoFrame> input_frames_;

   // Indicate an output frame has arrived.
   rtc::scoped_ptr<EventWrapper> output_frame_event_;

   // Output delivered frames of ViECaptuer.
   ScopedVector<I420VideoFrame> output_frames_;

   // The pointers of Y plane buffers of output frames. This is used to verify
   // the frame are swapped and not copied.
   std::vector<const uint8_t*> output_frame_ybuffers_;
 };

 TEST_F(ViECapturerTest, DoesNotRetainHandleNorCopyBuffer) {
   // Indicate an output frame has arrived.
   rtc::scoped_ptr<EventWrapper> frame_destroyed_event(EventWrapper::Create());
   class TestBuffer : public webrtc::I420Buffer {
    public:
     TestBuffer(EventWrapper* event) : I420Buffer(5, 5), event_(event) {}

    private:
     friend class rtc::RefCountedObject<TestBuffer>;
     ~TestBuffer() override { event_->Set(); }
     EventWrapper* event_;
   };

   I420VideoFrame frame(
       new rtc::RefCountedObject<TestBuffer>(frame_destroyed_event.get()), 1, 1,
       kVideoRotation_0);

   AddInputFrame(&frame);
   WaitOutputFrame();

   EXPECT_EQ(output_frames_[0]->video_frame_buffer().get(),
             frame.video_frame_buffer().get());
   output_frames_.clear();
   frame.Reset();
   EXPECT_EQ(kEventSignaled, frame_destroyed_event->Wait(FRAME_TIMEOUT_MS));
 }

 TEST_F(ViECapturerTest, TestNtpTimeStampSetIfRenderTimeSet) {
   input_frames_.push_back(CreateI420VideoFrame(static_cast<uint8_t>(0)));
   input_frames_[0]->set_render_time_ms(5);
   input_frames_[0]->set_ntp_time_ms(0);

   AddInputFrame(input_frames_[0]);
   WaitOutputFrame();
   EXPECT_GT(output_frames_[0]->ntp_time_ms(),
             input_frames_[0]->render_time_ms());
 }

 TEST_F(ViECapturerTest, TestRtpTimeStampSet) {
   input_frames_.push_back(CreateI420VideoFrame(static_cast<uint8_t>(0)));
   input_frames_[0]->set_render_time_ms(0);
   input_frames_[0]->set_ntp_time_ms(1);
   input_frames_[0]->set_timestamp(0);

   AddInputFrame(input_frames_[0]);
   WaitOutputFrame();
   EXPECT_EQ(output_frames_[0]->timestamp(),
             input_frames_[0]->ntp_time_ms() * 90);
 }

 TEST_F(ViECapturerTest, TestTextureFrames) {
   const int kNumFrame = 3;
   for (int i = 0 ; i < kNumFrame; ++i) {
     void* dummy_handle = reinterpret_cast<void*>(i+1);
     // Add one to |i| so that width/height > 0.
     input_frames_.push_back(
         new I420VideoFrame(dummy_handle, i + 1, i + 1, i + 1, i + 1,
                            webrtc::kVideoRotation_0, rtc::Callback0<void>()));
     AddInputFrame(input_frames_[i]);
     WaitOutputFrame();
     EXPECT_EQ(dummy_handle, output_frames_[i]->native_handle());
   }

   EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
 }

 TEST_F(ViECapturerTest, TestI420Frames) {
   const int kNumFrame = 4;
   std::vector<const uint8_t*> ybuffer_pointers;
   for (int i = 0; i < kNumFrame; ++i) {
     input_frames_.push_back(CreateI420VideoFrame(static_cast<uint8_t>(i + 1)));
     const I420VideoFrame* const_input_frame = input_frames_[i];
     ybuffer_pointers.push_back(const_input_frame->buffer(kYPlane));
     AddInputFrame(input_frames_[i]);
     WaitOutputFrame();
   }

   EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
   // Make sure the buffer is not copied.
   for (int i = 0; i < kNumFrame; ++i)
     EXPECT_EQ(ybuffer_pointers[i], output_frame_ybuffers_[i]);
 }

 TEST_F(ViECapturerTest, TestI420FrameAfterTextureFrame) {
   void* dummy_handle = &input_frames_;
   input_frames_.push_back(new I420VideoFrame(dummy_handle, 1, 1, 1, 1,
                                              webrtc::kVideoRotation_0,
                                              rtc::Callback0<void>()));
   AddInputFrame(input_frames_[0]);
   WaitOutputFrame();
   EXPECT_EQ(dummy_handle, output_frames_[0]->native_handle());

   input_frames_.push_back(CreateI420VideoFrame(2));
   AddInputFrame(input_frames_[1]);
   WaitOutputFrame();

   EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
 }

 TEST_F(ViECapturerTest, TestTextureFrameAfterI420Frame) {
   input_frames_.push_back(CreateI420VideoFrame(1));
   AddInputFrame(input_frames_[0]);
   WaitOutputFrame();

   void* dummy_handle = &input_frames_;
   input_frames_.push_back(new I420VideoFrame(dummy_handle, 1, 1, 2, 2,
                                              webrtc::kVideoRotation_0,
                                              rtc::Callback0<void>()));
   AddInputFrame(input_frames_[1]);
   WaitOutputFrame();

   EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
 }

 bool EqualFrames(const I420VideoFrame& frame1,
                  const I420VideoFrame& frame2) {
   if (frame1.native_handle() != NULL || frame2.native_handle() != NULL)
     return EqualTextureFrames(frame1, frame2);
   return EqualBufferFrames(frame1, frame2);
 }

 bool EqualTextureFrames(const I420VideoFrame& frame1,
                         const I420VideoFrame& frame2) {
   return ((frame1.native_handle() == frame2.native_handle()) &&
           (frame1.width() == frame2.width()) &&
           (frame1.height() == frame2.height()) &&
           (frame1.render_time_ms() == frame2.render_time_ms()));
 }

 bool EqualBufferFrames(const I420VideoFrame& frame1,
                        const I420VideoFrame& frame2) {
   return ((frame1.width() == frame2.width()) &&
           (frame1.height() == frame2.height()) &&
           (frame1.stride(kYPlane) == frame2.stride(kYPlane)) &&
           (frame1.stride(kUPlane) == frame2.stride(kUPlane)) &&
           (frame1.stride(kVPlane) == frame2.stride(kVPlane)) &&
           (frame1.render_time_ms() == frame2.render_time_ms()) &&
           (frame1.allocated_size(kYPlane) == frame2.allocated_size(kYPlane)) &&
           (frame1.allocated_size(kUPlane) == frame2.allocated_size(kUPlane)) &&
           (frame1.allocated_size(kVPlane) == frame2.allocated_size(kVPlane)) &&
           (memcmp(frame1.buffer(kYPlane), frame2.buffer(kYPlane),
                   frame1.allocated_size(kYPlane)) == 0) &&
           (memcmp(frame1.buffer(kUPlane), frame2.buffer(kUPlane),
                   frame1.allocated_size(kUPlane)) == 0) &&
           (memcmp(frame1.buffer(kVPlane), frame2.buffer(kVPlane),
                   frame1.allocated_size(kVPlane)) == 0));
 }

 bool EqualFramesVector(const ScopedVector<I420VideoFrame>& frames1,
                        const ScopedVector<I420VideoFrame>& frames2) {
   if (frames1.size() != frames2.size())
     return false;
   for (size_t i = 0; i < frames1.size(); ++i) {
     if (!EqualFrames(*frames1[i], *frames2[i]))
       return false;
   }
   return true;
 }

 I420VideoFrame* CreateI420VideoFrame(uint8_t data) {
   I420VideoFrame* frame = new I420VideoFrame();
   const int width = 36;
   const int height = 24;
   const int kSizeY = width * height * 2;
   uint8_t buffer[kSizeY];
   memset(buffer, data, kSizeY);
   frame->CreateFrame(
       buffer, buffer, buffer, width, height, width,
       width / 2, width / 2);
   frame->set_render_time_ms(data);
   return frame;
 }

 }  // namespace webrtc
	/*
	* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
	*
	* Use of this source code is governed by a BSD-style license
	* that can be found in the LICENSE file in the root of the source
	* tree. An additional intellectual property rights grant can be found
	* in the file PATENTS. All contributing project authors may
	* be found in the AUTHORS file in the root of the source tree.
	*/

	// This file includes unit tests for ViECapturer.

	#include "webrtc/video_engine/vie_capturer.h"

	#include <vector>

	#include "testing/gmock/include/gmock/gmock.h"
	#include "testing/gtest/include/gtest/gtest.h"
	#include "webrtc/base/scoped_ptr.h"
	#include "webrtc/common.h"
	#include "webrtc/modules/utility/interface/mock/mock_process_thread.h"
	#include "webrtc/modules/video_capture/include/mock/mock_video_capture.h"
	#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
	#include "webrtc/system_wrappers/interface/event_wrapper.h"
	#include "webrtc/system_wrappers/interface/ref_count.h"
	#include "webrtc/system_wrappers/interface/scoped_vector.h"
	#include "webrtc/video_engine/mock/mock_vie_frame_provider_base.h"

	using ::testing::_;
	using ::testing::Invoke;
	using ::testing::NiceMock;
	using ::testing::Return;
	using ::testing::WithArg;

	// If an output frame does not arrive in 500ms, the test will fail.
	#define FRAME_TIMEOUT_MS 500

	namespace webrtc {

	bool EqualFrames(const I420VideoFrame& frame1,
	const I420VideoFrame& frame2);
	bool EqualTextureFrames(const I420VideoFrame& frame1,
	const I420VideoFrame& frame2);
	bool EqualBufferFrames(const I420VideoFrame& frame1,
	const I420VideoFrame& frame2);
	bool EqualFramesVector(const ScopedVector<I420VideoFrame>& frames1,
	const ScopedVector<I420VideoFrame>& frames2);
	I420VideoFrame* CreateI420VideoFrame(uint8_t length);

	class ViECapturerTest : public ::testing::Test {
	protected:
	ViECapturerTest()
	: mock_capture_module_(new NiceMock<MockVideoCaptureModule>()),
	mock_process_thread_(new NiceMock<MockProcessThread>),
	mock_frame_callback_(new NiceMock<MockViEFrameCallback>),
	data_callback_(NULL),
	output_frame_event_(EventWrapper::Create()) {
	}

	virtual void SetUp() {
	EXPECT_CALL(*mock_capture_module_, RegisterCaptureDataCallback(_))
	.WillRepeatedly(Invoke(this, &ViECapturerTest::SetCaptureDataCallback));
	EXPECT_CALL(*mock_frame_callback_, DeliverFrame(_, _, _))
	.WillRepeatedly(
	WithArg<1>(Invoke(this, &ViECapturerTest::AddOutputFrame)));

	Config config;
	vie_capturer_.reset(
	ViECapturer::CreateViECapture(
	0, 0, config, mock_capture_module_.get(), *mock_process_thread_));
	vie_capturer_->RegisterFrameCallback(0, mock_frame_callback_.get());
	}

	virtual void TearDown() {
	vie_capturer_->DeregisterFrameCallback(mock_frame_callback_.get());
	// ViECapturer accesses \|mock_process_thread_\| in destructor and should
	// be deleted first.
	vie_capturer_.reset();
	}

	void SetCaptureDataCallback(VideoCaptureDataCallback& data_callback) {
	data_callback_ = &data_callback;
	}

	void AddInputFrame(I420VideoFrame* frame) {
	data_callback_->OnIncomingCapturedFrame(0, *frame);
	}

	void AddOutputFrame(const I420VideoFrame& frame) {
	if (frame.native_handle() == NULL)
	output_frame_ybuffers_.push_back(frame.buffer(kYPlane));
	output_frames_.push_back(new I420VideoFrame(frame));
	output_frame_event_->Set();
	}

	void WaitOutputFrame() {
	EXPECT_EQ(kEventSignaled, output_frame_event_->Wait(FRAME_TIMEOUT_MS));
	}

	rtc::scoped_ptr<MockVideoCaptureModule> mock_capture_module_;
	rtc::scoped_ptr<MockProcessThread> mock_process_thread_;
	rtc::scoped_ptr<MockViEFrameCallback> mock_frame_callback_;

	// Used to send input capture frames to ViECapturer.
	VideoCaptureDataCallback* data_callback_;

	rtc::scoped_ptr<ViECapturer> vie_capturer_;

	// Input capture frames of ViECapturer.
	ScopedVector<I420VideoFrame> input_frames_;

	// Indicate an output frame has arrived.
	rtc::scoped_ptr<EventWrapper> output_frame_event_;

	// Output delivered frames of ViECaptuer.
	ScopedVector<I420VideoFrame> output_frames_;

	// The pointers of Y plane buffers of output frames. This is used to verify
	// the frame are swapped and not copied.
	std::vector<const uint8_t*> output_frame_ybuffers_;
	};

	TEST_F(ViECapturerTest, DoesNotRetainHandleNorCopyBuffer) {
	// Indicate an output frame has arrived.
	rtc::scoped_ptr<EventWrapper> frame_destroyed_event(EventWrapper::Create());
	class TestBuffer : public webrtc::I420Buffer {
	public:
	TestBuffer(EventWrapper* event) : I420Buffer(5, 5), event_(event) {}

	private:
	friend class rtc::RefCountedObject<TestBuffer>;
	~TestBuffer() override { event_->Set(); }
	EventWrapper* event_;
	};

	I420VideoFrame frame(
	new rtc::RefCountedObject<TestBuffer>(frame_destroyed_event.get()), 1, 1,
	kVideoRotation_0);

	AddInputFrame(&frame);
	WaitOutputFrame();

	EXPECT_EQ(output_frames_[0]->video_frame_buffer().get(),
	frame.video_frame_buffer().get());
	output_frames_.clear();
	frame.Reset();
	EXPECT_EQ(kEventSignaled, frame_destroyed_event->Wait(FRAME_TIMEOUT_MS));
	}

	TEST_F(ViECapturerTest, TestNtpTimeStampSetIfRenderTimeSet) {
	input_frames_.push_back(CreateI420VideoFrame(static_cast<uint8_t>(0)));
	input_frames_[0]->set_render_time_ms(5);
	input_frames_[0]->set_ntp_time_ms(0);

	AddInputFrame(input_frames_[0]);
	WaitOutputFrame();
	EXPECT_GT(output_frames_[0]->ntp_time_ms(),
	input_frames_[0]->render_time_ms());
	}

	TEST_F(ViECapturerTest, TestRtpTimeStampSet) {
	input_frames_.push_back(CreateI420VideoFrame(static_cast<uint8_t>(0)));
	input_frames_[0]->set_render_time_ms(0);
	input_frames_[0]->set_ntp_time_ms(1);
	input_frames_[0]->set_timestamp(0);

	AddInputFrame(input_frames_[0]);
	WaitOutputFrame();
	EXPECT_EQ(output_frames_[0]->timestamp(),
	input_frames_[0]->ntp_time_ms() * 90);
	}

	TEST_F(ViECapturerTest, TestTextureFrames) {
	const int kNumFrame = 3;
	for (int i = 0 ; i < kNumFrame; ++i) {
	void* dummy_handle = reinterpret_cast<void*>(i+1);
	// Add one to \|i\| so that width/height > 0.
	input_frames_.push_back(
	new I420VideoFrame(dummy_handle, i + 1, i + 1, i + 1, i + 1,
	webrtc::kVideoRotation_0, rtc::Callback0<void>()));
	AddInputFrame(input_frames_[i]);
	WaitOutputFrame();
	EXPECT_EQ(dummy_handle, output_frames_[i]->native_handle());
	}

	EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
	}

	TEST_F(ViECapturerTest, TestI420Frames) {
	const int kNumFrame = 4;
	std::vector<const uint8_t*> ybuffer_pointers;
	for (int i = 0; i < kNumFrame; ++i) {
	input_frames_.push_back(CreateI420VideoFrame(static_cast<uint8_t>(i + 1)));
	const I420VideoFrame* const_input_frame = input_frames_[i];
	ybuffer_pointers.push_back(const_input_frame->buffer(kYPlane));
	AddInputFrame(input_frames_[i]);
	WaitOutputFrame();
	}

	EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
	// Make sure the buffer is not copied.
	for (int i = 0; i < kNumFrame; ++i)
	EXPECT_EQ(ybuffer_pointers[i], output_frame_ybuffers_[i]);
	}

	TEST_F(ViECapturerTest, TestI420FrameAfterTextureFrame) {
	void* dummy_handle = &input_frames_;
	input_frames_.push_back(new I420VideoFrame(dummy_handle, 1, 1, 1, 1,
	webrtc::kVideoRotation_0,
	rtc::Callback0<void>()));
	AddInputFrame(input_frames_[0]);
	WaitOutputFrame();
	EXPECT_EQ(dummy_handle, output_frames_[0]->native_handle());

	input_frames_.push_back(CreateI420VideoFrame(2));
	AddInputFrame(input_frames_[1]);
	WaitOutputFrame();

	EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
	}

	TEST_F(ViECapturerTest, TestTextureFrameAfterI420Frame) {
	input_frames_.push_back(CreateI420VideoFrame(1));
	AddInputFrame(input_frames_[0]);
	WaitOutputFrame();

	void* dummy_handle = &input_frames_;
	input_frames_.push_back(new I420VideoFrame(dummy_handle, 1, 1, 2, 2,
	webrtc::kVideoRotation_0,
	rtc::Callback0<void>()));
	AddInputFrame(input_frames_[1]);
	WaitOutputFrame();

	EXPECT_TRUE(EqualFramesVector(input_frames_, output_frames_));
	}

	bool EqualFrames(const I420VideoFrame& frame1,
	const I420VideoFrame& frame2) {
	if (frame1.native_handle() != NULL \|\| frame2.native_handle() != NULL)
	return EqualTextureFrames(frame1, frame2);
	return EqualBufferFrames(frame1, frame2);
	}

	bool EqualTextureFrames(const I420VideoFrame& frame1,
	const I420VideoFrame& frame2) {
	return ((frame1.native_handle() == frame2.native_handle()) &&
	(frame1.width() == frame2.width()) &&
	(frame1.height() == frame2.height()) &&
	(frame1.render_time_ms() == frame2.render_time_ms()));
	}

	bool EqualBufferFrames(const I420VideoFrame& frame1,
	const I420VideoFrame& frame2) {
	return ((frame1.width() == frame2.width()) &&
	(frame1.height() == frame2.height()) &&
	(frame1.stride(kYPlane) == frame2.stride(kYPlane)) &&
	(frame1.stride(kUPlane) == frame2.stride(kUPlane)) &&
	(frame1.stride(kVPlane) == frame2.stride(kVPlane)) &&
	(frame1.render_time_ms() == frame2.render_time_ms()) &&
	(frame1.allocated_size(kYPlane) == frame2.allocated_size(kYPlane)) &&
	(frame1.allocated_size(kUPlane) == frame2.allocated_size(kUPlane)) &&
	(frame1.allocated_size(kVPlane) == frame2.allocated_size(kVPlane)) &&
	(memcmp(frame1.buffer(kYPlane), frame2.buffer(kYPlane),
	frame1.allocated_size(kYPlane)) == 0) &&
	(memcmp(frame1.buffer(kUPlane), frame2.buffer(kUPlane),
	frame1.allocated_size(kUPlane)) == 0) &&
	(memcmp(frame1.buffer(kVPlane), frame2.buffer(kVPlane),
	frame1.allocated_size(kVPlane)) == 0));
	}

	bool EqualFramesVector(const ScopedVector<I420VideoFrame>& frames1,
	const ScopedVector<I420VideoFrame>& frames2) {
	if (frames1.size() != frames2.size())
	return false;
	for (size_t i = 0; i < frames1.size(); ++i) {
	if (!EqualFrames(frames1[i], frames2[i]))
	return false;
	}
	return true;
	}

	I420VideoFrame* CreateI420VideoFrame(uint8_t data) {
	I420VideoFrame* frame = new I420VideoFrame();
	const int width = 36;
	const int height = 24;
	const int kSizeY = width * height * 2;
	uint8_t buffer[kSizeY];
	memset(buffer, data, kSizeY);
	frame->CreateFrame(
	buffer, buffer, buffer, width, height, width,
	width / 2, width / 2);
	frame->set_render_time_ms(data);
	return frame;
	}

	} // namespace webrtc