webrtc/common_video/i420_video_frame_unittest.cc - platform/external/webrtc - Git at Google

 /*
  *  Copyright (c) 2012 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.
  */

 #include <math.h>
 #include <string.h>

 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_video/interface/i420_video_frame.h"
 #include "webrtc/system_wrappers/interface/ref_count.h"
 #include "webrtc/system_wrappers/interface/scoped_refptr.h"

 namespace webrtc {

 bool EqualPlane(const uint8_t* data1,
                 const uint8_t* data2,
                 int stride,
                 int width,
                 int height);
 bool EqualFrames(const I420VideoFrame& frame1, const I420VideoFrame& frame2);
 int ExpectedSize(int plane_stride, int image_height, PlaneType type);

 TEST(TestI420VideoFrame, InitialValues) {
   I420VideoFrame frame;
   // Invalid arguments - one call for each variable.
   EXPECT_TRUE(frame.IsZeroSize());
   EXPECT_EQ(kVideoRotation_0, frame.rotation());
   EXPECT_EQ(-1, frame.CreateEmptyFrame(0, 10, 10, 14, 14));
   EXPECT_EQ(-1, frame.CreateEmptyFrame(10, -1, 10, 90, 14));
   EXPECT_EQ(-1, frame.CreateEmptyFrame(10, 10, 0, 14, 18));
   EXPECT_EQ(-1, frame.CreateEmptyFrame(10, 10, 10, -2, 13));
   EXPECT_EQ(-1, frame.CreateEmptyFrame(10, 10, 10, 14, 0));
   EXPECT_EQ(0, frame.CreateEmptyFrame(10, 10, 10, 14, 90));
   EXPECT_FALSE(frame.IsZeroSize());
 }

 TEST(TestI420VideoFrame, WidthHeightValues) {
   I420VideoFrame frame;
   const int valid_value = 10;
   EXPECT_EQ(0, frame.CreateEmptyFrame(10, 10, 10, 14, 90));
   EXPECT_EQ(valid_value, frame.width());
   EXPECT_EQ(valid_value, frame.height());
   frame.set_timestamp(123u);
   EXPECT_EQ(123u, frame.timestamp());
   frame.set_ntp_time_ms(456);
   EXPECT_EQ(456, frame.ntp_time_ms());
   frame.set_render_time_ms(789);
   EXPECT_EQ(789, frame.render_time_ms());
 }

 TEST(TestI420VideoFrame, SizeAllocation) {
   I420VideoFrame frame;
   EXPECT_EQ(0, frame. CreateEmptyFrame(10, 10, 12, 14, 220));
   int height = frame.height();
   int stride_y = frame.stride(kYPlane);
   int stride_u = frame.stride(kUPlane);
   int stride_v = frame.stride(kVPlane);
   // Verify that allocated size was computed correctly.
   EXPECT_EQ(ExpectedSize(stride_y, height, kYPlane),
             frame.allocated_size(kYPlane));
   EXPECT_EQ(ExpectedSize(stride_u, height, kUPlane),
             frame.allocated_size(kUPlane));
   EXPECT_EQ(ExpectedSize(stride_v, height, kVPlane),
             frame.allocated_size(kVPlane));
 }

 TEST(TestI420VideoFrame, CopyFrame) {
   uint32_t timestamp = 1;
   int64_t ntp_time_ms = 2;
   int64_t render_time_ms = 3;
   int stride_y = 15;
   int stride_u = 10;
   int stride_v = 10;
   int width = 15;
   int height = 15;
   // Copy frame.
   I420VideoFrame small_frame;
   EXPECT_EQ(0, small_frame.CreateEmptyFrame(width, height,
                                             stride_y, stride_u, stride_v));
   small_frame.set_timestamp(timestamp);
   small_frame.set_ntp_time_ms(ntp_time_ms);
   small_frame.set_render_time_ms(render_time_ms);
   const int kSizeY = 400;
   const int kSizeU = 100;
   const int kSizeV = 100;
   const VideoRotation kRotation = kVideoRotation_270;
   uint8_t buffer_y[kSizeY];
   uint8_t buffer_u[kSizeU];
   uint8_t buffer_v[kSizeV];
   memset(buffer_y, 16, kSizeY);
   memset(buffer_u, 8, kSizeU);
   memset(buffer_v, 4, kSizeV);
   I420VideoFrame big_frame;
   EXPECT_EQ(0,
             big_frame.CreateFrame(kSizeY, buffer_y, kSizeU, buffer_u, kSizeV,
                                   buffer_v, width + 5, height + 5, stride_y + 5,
                                   stride_u, stride_v, kRotation));
   // Frame of smaller dimensions.
   EXPECT_EQ(0, small_frame.CopyFrame(big_frame));
   EXPECT_TRUE(EqualFrames(small_frame, big_frame));
   EXPECT_EQ(kRotation, small_frame.rotation());

   // Frame of larger dimensions.
   EXPECT_EQ(0, small_frame.CreateEmptyFrame(width, height,
                                             stride_y, stride_u, stride_v));
   memset(small_frame.buffer(kYPlane), 1, small_frame.allocated_size(kYPlane));
   memset(small_frame.buffer(kUPlane), 2, small_frame.allocated_size(kUPlane));
   memset(small_frame.buffer(kVPlane), 3, small_frame.allocated_size(kVPlane));
   EXPECT_EQ(0, big_frame.CopyFrame(small_frame));
   EXPECT_TRUE(EqualFrames(small_frame, big_frame));
 }

 TEST(TestI420VideoFrame, CloneFrame) {
   I420VideoFrame frame1;
   rtc::scoped_ptr<I420VideoFrame> frame2;
   const int kSizeY = 400;
   const int kSizeU = 100;
   const int kSizeV = 100;
   uint8_t buffer_y[kSizeY];
   uint8_t buffer_u[kSizeU];
   uint8_t buffer_v[kSizeV];
   memset(buffer_y, 16, kSizeY);
   memset(buffer_u, 8, kSizeU);
   memset(buffer_v, 4, kSizeV);
   frame1.CreateFrame(
       kSizeY, buffer_y, kSizeU, buffer_u, kSizeV, buffer_v, 20, 20, 20, 10, 10);
   frame1.set_timestamp(1);
   frame1.set_ntp_time_ms(2);
   frame1.set_render_time_ms(3);

   frame2.reset(frame1.CloneFrame());
   EXPECT_TRUE(frame2.get() != NULL);
   EXPECT_TRUE(EqualFrames(frame1, *frame2));
 }

 TEST(TestI420VideoFrame, CopyBuffer) {
   I420VideoFrame frame1, frame2;
   int width = 15;
   int height = 15;
   int stride_y = 15;
   int stride_uv = 10;
   const int kSizeY = 225;
   const int kSizeUv = 80;
   EXPECT_EQ(0, frame2.CreateEmptyFrame(width, height,
                                        stride_y, stride_uv, stride_uv));
   uint8_t buffer_y[kSizeY];
   uint8_t buffer_u[kSizeUv];
   uint8_t buffer_v[kSizeUv];
   memset(buffer_y, 16, kSizeY);
   memset(buffer_u, 8, kSizeUv);
   memset(buffer_v, 4, kSizeUv);
   frame2.CreateFrame(kSizeY, buffer_y,
                      kSizeUv, buffer_u,
                      kSizeUv, buffer_v,
                      width, height, stride_y, stride_uv, stride_uv);
   // Expect exactly the same pixel data.
   EXPECT_TRUE(EqualPlane(buffer_y, frame2.buffer(kYPlane), stride_y, 15, 15));
   EXPECT_TRUE(EqualPlane(buffer_u, frame2.buffer(kUPlane), stride_uv, 8, 8));
   EXPECT_TRUE(EqualPlane(buffer_v, frame2.buffer(kVPlane), stride_uv, 8, 8));

   // Compare size.
   EXPECT_LE(kSizeY, frame2.allocated_size(kYPlane));
   EXPECT_LE(kSizeUv, frame2.allocated_size(kUPlane));
   EXPECT_LE(kSizeUv, frame2.allocated_size(kVPlane));
 }

 TEST(TestI420VideoFrame, FrameSwap) {
   I420VideoFrame frame1, frame2;
   uint32_t timestamp1 = 1;
   int64_t ntp_time_ms1 = 2;
   int64_t render_time_ms1 = 3;
   int stride_y1 = 15;
   int stride_u1 = 10;
   int stride_v1 = 10;
   int width1 = 15;
   int height1 = 15;
   const int kSizeY1 = 225;
   const int kSizeU1 = 80;
   const int kSizeV1 = 80;
   uint32_t timestamp2 = 4;
   int64_t ntp_time_ms2 = 5;
   int64_t render_time_ms2 = 6;
   int stride_y2 = 30;
   int stride_u2 = 20;
   int stride_v2 = 20;
   int width2 = 30;
   int height2 = 30;
   const int kSizeY2 = 900;
   const int kSizeU2 = 300;
   const int kSizeV2 = 300;
   // Initialize frame1 values.
   EXPECT_EQ(0, frame1.CreateEmptyFrame(width1, height1,
                                        stride_y1, stride_u1, stride_v1));
   frame1.set_timestamp(timestamp1);
   frame1.set_ntp_time_ms(ntp_time_ms1);
   frame1.set_render_time_ms(render_time_ms1);
   // Set memory for frame1.
   uint8_t buffer_y1[kSizeY1];
   uint8_t buffer_u1[kSizeU1];
   uint8_t buffer_v1[kSizeV1];
   memset(buffer_y1, 2, kSizeY1);
   memset(buffer_u1, 4, kSizeU1);
   memset(buffer_v1, 8, kSizeV1);
   frame1.CreateFrame(kSizeY1, buffer_y1,
                      kSizeU1, buffer_u1,
                      kSizeV1, buffer_v1,
                      width1, height1, stride_y1, stride_u1, stride_v1);
   // Initialize frame2 values.
   EXPECT_EQ(0, frame2.CreateEmptyFrame(width2, height2,
                                        stride_y2, stride_u2, stride_v2));
   frame2.set_timestamp(timestamp2);
   frame1.set_ntp_time_ms(ntp_time_ms2);
   frame2.set_render_time_ms(render_time_ms2);
   // Set memory for frame2.
   uint8_t buffer_y2[kSizeY2];
   uint8_t buffer_u2[kSizeU2];
   uint8_t buffer_v2[kSizeV2];
   memset(buffer_y2, 0, kSizeY2);
   memset(buffer_u2, 1, kSizeU2);
   memset(buffer_v2, 2, kSizeV2);
   frame2.CreateFrame(kSizeY2, buffer_y2,
                      kSizeU2, buffer_u2,
                      kSizeV2, buffer_v2,
                      width2, height2, stride_y2, stride_u2, stride_v2);
   // Copy frames for subsequent comparison.
   I420VideoFrame frame1_copy, frame2_copy;
   frame1_copy.CopyFrame(frame1);
   frame2_copy.CopyFrame(frame2);
   // Swap frames.
   frame1.SwapFrame(&frame2);
   // Verify swap.
   EXPECT_TRUE(EqualFrames(frame1_copy, frame2));
   EXPECT_TRUE(EqualFrames(frame2_copy, frame1));
 }

 TEST(TestI420VideoFrame, RefCountedInstantiation) {
   // Refcounted instantiation - ref_count should correspond to the number of
   // instances.
   scoped_refptr<I420VideoFrame> ref_count_frame(
       new RefCountImpl<I420VideoFrame>());
   EXPECT_EQ(2, ref_count_frame->AddRef());
   EXPECT_EQ(3, ref_count_frame->AddRef());
   EXPECT_EQ(2, ref_count_frame->Release());
   EXPECT_EQ(1, ref_count_frame->Release());
 }

 bool EqualPlane(const uint8_t* data1,
                 const uint8_t* data2,
                 int stride,
                 int width,
                 int height) {
   for (int y = 0; y < height; ++y) {
     if (memcmp(data1, data2, width) != 0)
       return false;
     data1 += stride;
     data2 += stride;
   }
   return true;
 }

 bool EqualFrames(const I420VideoFrame& frame1, const I420VideoFrame& frame2) {
   if ((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.timestamp() != frame2.timestamp()) ||
       (frame1.ntp_time_ms() != frame2.ntp_time_ms()) ||
       (frame1.render_time_ms() != frame2.render_time_ms())) {
     return false;
   }
   const int half_width = (frame1.width() + 1) / 2;
   const int half_height = (frame1.height() + 1) / 2;
   return EqualPlane(frame1.buffer(kYPlane), frame2.buffer(kYPlane),
                     frame1.stride(kYPlane), frame1.width(), frame1.height()) &&
          EqualPlane(frame1.buffer(kUPlane), frame2.buffer(kUPlane),
                     frame1.stride(kUPlane), half_width, half_height) &&
          EqualPlane(frame1.buffer(kVPlane), frame2.buffer(kVPlane),
                     frame1.stride(kVPlane), half_width, half_height);
 }

 int ExpectedSize(int plane_stride, int image_height, PlaneType type) {
   if (type == kYPlane) {
     return (plane_stride * image_height);
   } else {
     int half_height = (image_height + 1) / 2;
     return (plane_stride * half_height);
   }
 }

 }  // namespace webrtc
	/*
	* Copyright (c) 2012 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.
	*/

	#include <math.h>
	#include <string.h>

	#include "testing/gtest/include/gtest/gtest.h"
	#include "webrtc/base/scoped_ptr.h"
	#include "webrtc/common_video/interface/i420_video_frame.h"
	#include "webrtc/system_wrappers/interface/ref_count.h"
	#include "webrtc/system_wrappers/interface/scoped_refptr.h"

	namespace webrtc {

	bool EqualPlane(const uint8_t* data1,
	const uint8_t* data2,
	int stride,
	int width,
	int height);
	bool EqualFrames(const I420VideoFrame& frame1, const I420VideoFrame& frame2);
	int ExpectedSize(int plane_stride, int image_height, PlaneType type);

	TEST(TestI420VideoFrame, InitialValues) {
	I420VideoFrame frame;
	// Invalid arguments - one call for each variable.
	EXPECT_TRUE(frame.IsZeroSize());
	EXPECT_EQ(kVideoRotation_0, frame.rotation());
	EXPECT_EQ(-1, frame.CreateEmptyFrame(0, 10, 10, 14, 14));
	EXPECT_EQ(-1, frame.CreateEmptyFrame(10, -1, 10, 90, 14));
	EXPECT_EQ(-1, frame.CreateEmptyFrame(10, 10, 0, 14, 18));
	EXPECT_EQ(-1, frame.CreateEmptyFrame(10, 10, 10, -2, 13));
	EXPECT_EQ(-1, frame.CreateEmptyFrame(10, 10, 10, 14, 0));
	EXPECT_EQ(0, frame.CreateEmptyFrame(10, 10, 10, 14, 90));
	EXPECT_FALSE(frame.IsZeroSize());
	}

	TEST(TestI420VideoFrame, WidthHeightValues) {
	I420VideoFrame frame;
	const int valid_value = 10;
	EXPECT_EQ(0, frame.CreateEmptyFrame(10, 10, 10, 14, 90));
	EXPECT_EQ(valid_value, frame.width());
	EXPECT_EQ(valid_value, frame.height());
	frame.set_timestamp(123u);
	EXPECT_EQ(123u, frame.timestamp());
	frame.set_ntp_time_ms(456);
	EXPECT_EQ(456, frame.ntp_time_ms());
	frame.set_render_time_ms(789);
	EXPECT_EQ(789, frame.render_time_ms());
	}

	TEST(TestI420VideoFrame, SizeAllocation) {
	I420VideoFrame frame;
	EXPECT_EQ(0, frame. CreateEmptyFrame(10, 10, 12, 14, 220));
	int height = frame.height();
	int stride_y = frame.stride(kYPlane);
	int stride_u = frame.stride(kUPlane);
	int stride_v = frame.stride(kVPlane);
	// Verify that allocated size was computed correctly.
	EXPECT_EQ(ExpectedSize(stride_y, height, kYPlane),
	frame.allocated_size(kYPlane));
	EXPECT_EQ(ExpectedSize(stride_u, height, kUPlane),
	frame.allocated_size(kUPlane));
	EXPECT_EQ(ExpectedSize(stride_v, height, kVPlane),
	frame.allocated_size(kVPlane));
	}

	TEST(TestI420VideoFrame, CopyFrame) {
	uint32_t timestamp = 1;
	int64_t ntp_time_ms = 2;
	int64_t render_time_ms = 3;
	int stride_y = 15;
	int stride_u = 10;
	int stride_v = 10;
	int width = 15;
	int height = 15;
	// Copy frame.
	I420VideoFrame small_frame;
	EXPECT_EQ(0, small_frame.CreateEmptyFrame(width, height,
	stride_y, stride_u, stride_v));
	small_frame.set_timestamp(timestamp);
	small_frame.set_ntp_time_ms(ntp_time_ms);
	small_frame.set_render_time_ms(render_time_ms);
	const int kSizeY = 400;
	const int kSizeU = 100;
	const int kSizeV = 100;
	const VideoRotation kRotation = kVideoRotation_270;
	uint8_t buffer_y[kSizeY];
	uint8_t buffer_u[kSizeU];
	uint8_t buffer_v[kSizeV];
	memset(buffer_y, 16, kSizeY);
	memset(buffer_u, 8, kSizeU);
	memset(buffer_v, 4, kSizeV);
	I420VideoFrame big_frame;
	EXPECT_EQ(0,
	big_frame.CreateFrame(kSizeY, buffer_y, kSizeU, buffer_u, kSizeV,
	buffer_v, width + 5, height + 5, stride_y + 5,
	stride_u, stride_v, kRotation));
	// Frame of smaller dimensions.
	EXPECT_EQ(0, small_frame.CopyFrame(big_frame));
	EXPECT_TRUE(EqualFrames(small_frame, big_frame));
	EXPECT_EQ(kRotation, small_frame.rotation());

	// Frame of larger dimensions.
	EXPECT_EQ(0, small_frame.CreateEmptyFrame(width, height,
	stride_y, stride_u, stride_v));
	memset(small_frame.buffer(kYPlane), 1, small_frame.allocated_size(kYPlane));
	memset(small_frame.buffer(kUPlane), 2, small_frame.allocated_size(kUPlane));
	memset(small_frame.buffer(kVPlane), 3, small_frame.allocated_size(kVPlane));
	EXPECT_EQ(0, big_frame.CopyFrame(small_frame));
	EXPECT_TRUE(EqualFrames(small_frame, big_frame));
	}

	TEST(TestI420VideoFrame, CloneFrame) {
	I420VideoFrame frame1;
	rtc::scoped_ptr<I420VideoFrame> frame2;
	const int kSizeY = 400;
	const int kSizeU = 100;
	const int kSizeV = 100;
	uint8_t buffer_y[kSizeY];
	uint8_t buffer_u[kSizeU];
	uint8_t buffer_v[kSizeV];
	memset(buffer_y, 16, kSizeY);
	memset(buffer_u, 8, kSizeU);
	memset(buffer_v, 4, kSizeV);
	frame1.CreateFrame(
	kSizeY, buffer_y, kSizeU, buffer_u, kSizeV, buffer_v, 20, 20, 20, 10, 10);
	frame1.set_timestamp(1);
	frame1.set_ntp_time_ms(2);
	frame1.set_render_time_ms(3);

	frame2.reset(frame1.CloneFrame());
	EXPECT_TRUE(frame2.get() != NULL);
	EXPECT_TRUE(EqualFrames(frame1, *frame2));
	}

	TEST(TestI420VideoFrame, CopyBuffer) {
	I420VideoFrame frame1, frame2;
	int width = 15;
	int height = 15;
	int stride_y = 15;
	int stride_uv = 10;
	const int kSizeY = 225;
	const int kSizeUv = 80;
	EXPECT_EQ(0, frame2.CreateEmptyFrame(width, height,
	stride_y, stride_uv, stride_uv));
	uint8_t buffer_y[kSizeY];
	uint8_t buffer_u[kSizeUv];
	uint8_t buffer_v[kSizeUv];
	memset(buffer_y, 16, kSizeY);
	memset(buffer_u, 8, kSizeUv);
	memset(buffer_v, 4, kSizeUv);
	frame2.CreateFrame(kSizeY, buffer_y,
	kSizeUv, buffer_u,
	kSizeUv, buffer_v,
	width, height, stride_y, stride_uv, stride_uv);
	// Expect exactly the same pixel data.
	EXPECT_TRUE(EqualPlane(buffer_y, frame2.buffer(kYPlane), stride_y, 15, 15));
	EXPECT_TRUE(EqualPlane(buffer_u, frame2.buffer(kUPlane), stride_uv, 8, 8));
	EXPECT_TRUE(EqualPlane(buffer_v, frame2.buffer(kVPlane), stride_uv, 8, 8));

	// Compare size.
	EXPECT_LE(kSizeY, frame2.allocated_size(kYPlane));
	EXPECT_LE(kSizeUv, frame2.allocated_size(kUPlane));
	EXPECT_LE(kSizeUv, frame2.allocated_size(kVPlane));
	}

	TEST(TestI420VideoFrame, FrameSwap) {
	I420VideoFrame frame1, frame2;
	uint32_t timestamp1 = 1;
	int64_t ntp_time_ms1 = 2;
	int64_t render_time_ms1 = 3;
	int stride_y1 = 15;
	int stride_u1 = 10;
	int stride_v1 = 10;
	int width1 = 15;
	int height1 = 15;
	const int kSizeY1 = 225;
	const int kSizeU1 = 80;
	const int kSizeV1 = 80;
	uint32_t timestamp2 = 4;
	int64_t ntp_time_ms2 = 5;
	int64_t render_time_ms2 = 6;
	int stride_y2 = 30;
	int stride_u2 = 20;
	int stride_v2 = 20;
	int width2 = 30;
	int height2 = 30;
	const int kSizeY2 = 900;
	const int kSizeU2 = 300;
	const int kSizeV2 = 300;
	// Initialize frame1 values.
	EXPECT_EQ(0, frame1.CreateEmptyFrame(width1, height1,
	stride_y1, stride_u1, stride_v1));
	frame1.set_timestamp(timestamp1);
	frame1.set_ntp_time_ms(ntp_time_ms1);
	frame1.set_render_time_ms(render_time_ms1);
	// Set memory for frame1.
	uint8_t buffer_y1[kSizeY1];
	uint8_t buffer_u1[kSizeU1];
	uint8_t buffer_v1[kSizeV1];
	memset(buffer_y1, 2, kSizeY1);
	memset(buffer_u1, 4, kSizeU1);
	memset(buffer_v1, 8, kSizeV1);
	frame1.CreateFrame(kSizeY1, buffer_y1,
	kSizeU1, buffer_u1,
	kSizeV1, buffer_v1,
	width1, height1, stride_y1, stride_u1, stride_v1);
	// Initialize frame2 values.
	EXPECT_EQ(0, frame2.CreateEmptyFrame(width2, height2,
	stride_y2, stride_u2, stride_v2));
	frame2.set_timestamp(timestamp2);
	frame1.set_ntp_time_ms(ntp_time_ms2);
	frame2.set_render_time_ms(render_time_ms2);
	// Set memory for frame2.
	uint8_t buffer_y2[kSizeY2];
	uint8_t buffer_u2[kSizeU2];
	uint8_t buffer_v2[kSizeV2];
	memset(buffer_y2, 0, kSizeY2);
	memset(buffer_u2, 1, kSizeU2);
	memset(buffer_v2, 2, kSizeV2);
	frame2.CreateFrame(kSizeY2, buffer_y2,
	kSizeU2, buffer_u2,
	kSizeV2, buffer_v2,
	width2, height2, stride_y2, stride_u2, stride_v2);
	// Copy frames for subsequent comparison.
	I420VideoFrame frame1_copy, frame2_copy;
	frame1_copy.CopyFrame(frame1);
	frame2_copy.CopyFrame(frame2);
	// Swap frames.
	frame1.SwapFrame(&frame2);
	// Verify swap.
	EXPECT_TRUE(EqualFrames(frame1_copy, frame2));
	EXPECT_TRUE(EqualFrames(frame2_copy, frame1));
	}

	TEST(TestI420VideoFrame, RefCountedInstantiation) {
	// Refcounted instantiation - ref_count should correspond to the number of
	// instances.
	scoped_refptr<I420VideoFrame> ref_count_frame(
	new RefCountImpl<I420VideoFrame>());
	EXPECT_EQ(2, ref_count_frame->AddRef());
	EXPECT_EQ(3, ref_count_frame->AddRef());
	EXPECT_EQ(2, ref_count_frame->Release());
	EXPECT_EQ(1, ref_count_frame->Release());
	}

	bool EqualPlane(const uint8_t* data1,
	const uint8_t* data2,
	int stride,
	int width,
	int height) {
	for (int y = 0; y < height; ++y) {
	if (memcmp(data1, data2, width) != 0)
	return false;
	data1 += stride;
	data2 += stride;
	}
	return true;
	}

	bool EqualFrames(const I420VideoFrame& frame1, const I420VideoFrame& frame2) {
	if ((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.timestamp() != frame2.timestamp()) \|\|
	(frame1.ntp_time_ms() != frame2.ntp_time_ms()) \|\|
	(frame1.render_time_ms() != frame2.render_time_ms())) {
	return false;
	}
	const int half_width = (frame1.width() + 1) / 2;
	const int half_height = (frame1.height() + 1) / 2;
	return EqualPlane(frame1.buffer(kYPlane), frame2.buffer(kYPlane),
	frame1.stride(kYPlane), frame1.width(), frame1.height()) &&
	EqualPlane(frame1.buffer(kUPlane), frame2.buffer(kUPlane),
	frame1.stride(kUPlane), half_width, half_height) &&
	EqualPlane(frame1.buffer(kVPlane), frame2.buffer(kVPlane),
	frame1.stride(kVPlane), half_width, half_height);
	}

	int ExpectedSize(int plane_stride, int image_height, PlaneType type) {
	if (type == kYPlane) {
	return (plane_stride * image_height);
	} else {
	int half_height = (image_height + 1) / 2;
	return (plane_stride * half_height);
	}
	}

	} // namespace webrtc