webrtc/modules/video_coding/main/source/video_sender_unittest.cc - platform/external/webrtc - Git at Google

 /*
  *  Copyright (c) 2013 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 <vector>

 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common.h"
 #include "webrtc/modules/video_coding/codecs/interface/mock/mock_video_codec_interface.h"
 #include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
 #include "webrtc/modules/video_coding/codecs/vp8/include/vp8_common_types.h"
 #include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
 #include "webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h"
 #include "webrtc/modules/video_coding/main/interface/video_coding.h"
 #include "webrtc/modules/video_coding/main/source/video_coding_impl.h"
 #include "webrtc/modules/video_coding/main/test/test_util.h"
 #include "webrtc/system_wrappers/include/clock.h"
 #include "webrtc/test/frame_generator.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/test/testsupport/gtest_disable.h"

 using ::testing::_;
 using ::testing::AllOf;
 using ::testing::ElementsAre;
 using ::testing::ElementsAreArray;
 using ::testing::Field;
 using ::testing::NiceMock;
 using ::testing::Pointee;
 using ::testing::Return;
 using ::testing::FloatEq;
 using std::vector;
 using webrtc::test::FrameGenerator;

 namespace webrtc {
 namespace vcm {
 namespace {
 enum {
   kMaxNumberOfTemporalLayers = 3
 };

 struct Vp8StreamInfo {
   float framerate_fps[kMaxNumberOfTemporalLayers];
   int bitrate_kbps[kMaxNumberOfTemporalLayers];
 };

 MATCHER_P(MatchesVp8StreamInfo, expected, "") {
   bool res = true;
   for (int tl = 0; tl < kMaxNumberOfTemporalLayers; ++tl) {
     if (fabs(expected.framerate_fps[tl] - arg.framerate_fps[tl]) > 0.5) {
       *result_listener << " framerate_fps[" << tl
                        << "] = " << arg.framerate_fps[tl] << " (expected "
                        << expected.framerate_fps[tl] << ") ";
       res = false;
     }
     if (abs(expected.bitrate_kbps[tl] - arg.bitrate_kbps[tl]) > 10) {
       *result_listener << " bitrate_kbps[" << tl
                        << "] = " << arg.bitrate_kbps[tl] << " (expected "
                        << expected.bitrate_kbps[tl] << ") ";
       res = false;
     }
   }
   return res;
 }

 class EmptyFrameGenerator : public FrameGenerator {
  public:
   EmptyFrameGenerator(int width, int height) : width_(width), height_(height) {}
   VideoFrame* NextFrame() override {
     frame_.reset(new VideoFrame());
     frame_->CreateEmptyFrame(width_, height_, width_, (width_ + 1) / 2,
                              (width_ + 1) / 2);
     return frame_.get();
   }

  private:
   const int width_;
   const int height_;
   rtc::scoped_ptr<VideoFrame> frame_;
 };

 class PacketizationCallback : public VCMPacketizationCallback {
  public:
   PacketizationCallback(Clock* clock)
       : clock_(clock), start_time_ms_(clock_->TimeInMilliseconds()) {}

   virtual ~PacketizationCallback() {}

   int32_t SendData(uint8_t payload_type,
                    const EncodedImage& encoded_image,
                    const RTPFragmentationHeader& fragmentation_header,
                    const RTPVideoHeader* rtp_video_header) override {
     assert(rtp_video_header);
     frame_data_.push_back(FrameData(encoded_image._length, *rtp_video_header));
     return 0;
   }

   void Reset() {
     frame_data_.clear();
     start_time_ms_ = clock_->TimeInMilliseconds();
   }

   float FramerateFpsWithinTemporalLayer(int temporal_layer) {
     return CountFramesWithinTemporalLayer(temporal_layer) *
            (1000.0 / interval_ms());
   }

   float BitrateKbpsWithinTemporalLayer(int temporal_layer) {
     return SumPayloadBytesWithinTemporalLayer(temporal_layer) * 8.0 /
            interval_ms();
   }

   Vp8StreamInfo CalculateVp8StreamInfo() {
     Vp8StreamInfo info;
     for (int tl = 0; tl < 3; ++tl) {
       info.framerate_fps[tl] = FramerateFpsWithinTemporalLayer(tl);
       info.bitrate_kbps[tl] = BitrateKbpsWithinTemporalLayer(tl);
     }
     return info;
   }

  private:
   struct FrameData {
     FrameData() {}

     FrameData(size_t payload_size, const RTPVideoHeader& rtp_video_header)
         : payload_size(payload_size), rtp_video_header(rtp_video_header) {}

     size_t payload_size;
     RTPVideoHeader rtp_video_header;
   };

   int64_t interval_ms() {
     int64_t diff = (clock_->TimeInMilliseconds() - start_time_ms_);
     EXPECT_GT(diff, 0);
     return diff;
   }

   int CountFramesWithinTemporalLayer(int temporal_layer) {
     int frames = 0;
     for (size_t i = 0; i < frame_data_.size(); ++i) {
       EXPECT_EQ(kRtpVideoVp8, frame_data_[i].rtp_video_header.codec);
       const uint8_t temporal_idx =
           frame_data_[i].rtp_video_header.codecHeader.VP8.temporalIdx;
       if (temporal_idx <= temporal_layer || temporal_idx == kNoTemporalIdx)
         frames++;
     }
     return frames;
   }

   size_t SumPayloadBytesWithinTemporalLayer(int temporal_layer) {
     size_t payload_size = 0;
     for (size_t i = 0; i < frame_data_.size(); ++i) {
       EXPECT_EQ(kRtpVideoVp8, frame_data_[i].rtp_video_header.codec);
       const uint8_t temporal_idx =
           frame_data_[i].rtp_video_header.codecHeader.VP8.temporalIdx;
       if (temporal_idx <= temporal_layer || temporal_idx == kNoTemporalIdx)
         payload_size += frame_data_[i].payload_size;
     }
     return payload_size;
   }

   Clock* clock_;
   int64_t start_time_ms_;
   vector<FrameData> frame_data_;
 };

 class TestVideoSender : public ::testing::Test {
  protected:
   // Note: simulated clock starts at 1 seconds, since parts of webrtc use 0 as
   // a special case (e.g. frame rate in media optimization).
   TestVideoSender() : clock_(1000), packetization_callback_(&clock_) {}

   void SetUp() override {
     sender_.reset(
         new VideoSender(&clock_, &post_encode_callback_, nullptr, nullptr));
     EXPECT_EQ(0, sender_->RegisterTransportCallback(&packetization_callback_));
   }

   void AddFrame() {
     assert(generator_.get());
     sender_->AddVideoFrame(*generator_->NextFrame(), NULL, NULL);
   }

   SimulatedClock clock_;
   PacketizationCallback packetization_callback_;
   MockEncodedImageCallback post_encode_callback_;
   // Used by subclassing tests, need to outlive sender_.
   rtc::scoped_ptr<VideoEncoder> encoder_;
   rtc::scoped_ptr<VideoSender> sender_;
   rtc::scoped_ptr<FrameGenerator> generator_;
 };

 class TestVideoSenderWithMockEncoder : public TestVideoSender {
  protected:
   static const int kDefaultWidth = 1280;
   static const int kDefaultHeight = 720;
   static const int kNumberOfStreams = 3;
   static const int kNumberOfLayers = 3;
   static const int kUnusedPayloadType = 10;

   void SetUp() override {
     TestVideoSender::SetUp();
     EXPECT_EQ(
         0,
         sender_->RegisterExternalEncoder(&encoder_, kUnusedPayloadType, false));
     memset(&settings_, 0, sizeof(settings_));
     EXPECT_EQ(0, VideoCodingModule::Codec(kVideoCodecVP8, &settings_));
     settings_.numberOfSimulcastStreams = kNumberOfStreams;
     ConfigureStream(kDefaultWidth / 4,
                     kDefaultHeight / 4,
                     100,
                     &settings_.simulcastStream[0]);
     ConfigureStream(kDefaultWidth / 2,
                     kDefaultHeight / 2,
                     500,
                     &settings_.simulcastStream[1]);
     ConfigureStream(
         kDefaultWidth, kDefaultHeight, 1200, &settings_.simulcastStream[2]);
     settings_.plType = kUnusedPayloadType;  // Use the mocked encoder.
     generator_.reset(
         new EmptyFrameGenerator(settings_.width, settings_.height));
     EXPECT_EQ(0, sender_->RegisterSendCodec(&settings_, 1, 1200));
   }

   void TearDown() override { sender_.reset(); }

   void ExpectIntraRequest(int stream) {
     if (stream == -1) {
       // No intra request expected.
       EXPECT_CALL(
           encoder_,
           Encode(_, _, Pointee(ElementsAre(kVideoFrameDelta, kVideoFrameDelta,
                                            kVideoFrameDelta))))
           .Times(1)
           .WillRepeatedly(Return(0));
       return;
     }
     assert(stream >= 0);
     assert(stream < kNumberOfStreams);
     std::vector<FrameType> frame_types(kNumberOfStreams, kVideoFrameDelta);
     frame_types[stream] = kVideoFrameKey;
     EXPECT_CALL(
         encoder_,
         Encode(_,
                _,
                Pointee(ElementsAreArray(&frame_types[0], frame_types.size()))))
         .Times(1).WillRepeatedly(Return(0));
   }

   static void ConfigureStream(int width,
                               int height,
                               int max_bitrate,
                               SimulcastStream* stream) {
     assert(stream);
     stream->width = width;
     stream->height = height;
     stream->maxBitrate = max_bitrate;
     stream->numberOfTemporalLayers = kNumberOfLayers;
     stream->qpMax = 45;
   }

   VideoCodec settings_;
   NiceMock<MockVideoEncoder> encoder_;
 };

 TEST_F(TestVideoSenderWithMockEncoder, TestIntraRequests) {
   EXPECT_EQ(0, sender_->IntraFrameRequest(0));
   ExpectIntraRequest(0);
   AddFrame();
   ExpectIntraRequest(-1);
   AddFrame();

   EXPECT_EQ(0, sender_->IntraFrameRequest(1));
   ExpectIntraRequest(1);
   AddFrame();
   ExpectIntraRequest(-1);
   AddFrame();

   EXPECT_EQ(0, sender_->IntraFrameRequest(2));
   ExpectIntraRequest(2);
   AddFrame();
   ExpectIntraRequest(-1);
   AddFrame();

   EXPECT_EQ(-1, sender_->IntraFrameRequest(3));
   ExpectIntraRequest(-1);
   AddFrame();

   EXPECT_EQ(-1, sender_->IntraFrameRequest(-1));
   ExpectIntraRequest(-1);
   AddFrame();
 }

 TEST_F(TestVideoSenderWithMockEncoder, TestIntraRequestsInternalCapture) {
   // De-register current external encoder.
   EXPECT_EQ(0,
             sender_->RegisterExternalEncoder(NULL, kUnusedPayloadType, false));
   // Register encoder with internal capture.
   EXPECT_EQ(
       0, sender_->RegisterExternalEncoder(&encoder_, kUnusedPayloadType, true));
   EXPECT_EQ(0, sender_->RegisterSendCodec(&settings_, 1, 1200));
   ExpectIntraRequest(0);
   EXPECT_EQ(0, sender_->IntraFrameRequest(0));
   ExpectIntraRequest(1);
   EXPECT_EQ(0, sender_->IntraFrameRequest(1));
   ExpectIntraRequest(2);
   EXPECT_EQ(0, sender_->IntraFrameRequest(2));
   // No requests expected since these indices are out of bounds.
   EXPECT_EQ(-1, sender_->IntraFrameRequest(3));
   EXPECT_EQ(-1, sender_->IntraFrameRequest(-1));
 }

 TEST_F(TestVideoSenderWithMockEncoder, EncoderFramerateUpdatedViaProcess) {
   sender_->SetChannelParameters(settings_.startBitrate, 0, 200);
   const int64_t kRateStatsWindowMs = 2000;
   const uint32_t kInputFps = 20;
   int64_t start_time = clock_.TimeInMilliseconds();
   while (clock_.TimeInMilliseconds() < start_time + kRateStatsWindowMs) {
     AddFrame();
     clock_.AdvanceTimeMilliseconds(1000 / kInputFps);
   }
   EXPECT_CALL(encoder_, SetRates(_, kInputFps)).Times(1).WillOnce(Return(0));
   sender_->Process();
   AddFrame();
 }

 class TestVideoSenderWithVp8 : public TestVideoSender {
  public:
   TestVideoSenderWithVp8()
       : codec_bitrate_kbps_(300), available_bitrate_kbps_(1000) {}

   void SetUp() override {
     TestVideoSender::SetUp();

     const char* input_video = "foreman_cif";
     const int width = 352;
     const int height = 288;
     generator_.reset(FrameGenerator::CreateFromYuvFile(
         std::vector<std::string>(1, test::ResourcePath(input_video, "yuv")),
         width, height, 1));

     codec_ = MakeVp8VideoCodec(width, height, 3);
     codec_.minBitrate = 10;
     codec_.startBitrate = codec_bitrate_kbps_;
     codec_.maxBitrate = codec_bitrate_kbps_;
     encoder_.reset(VP8Encoder::Create());
     ASSERT_EQ(0, sender_->RegisterExternalEncoder(encoder_.get(), codec_.plType,
                                                   false));
     EXPECT_EQ(0, sender_->RegisterSendCodec(&codec_, 1, 1200));
   }

   static VideoCodec MakeVp8VideoCodec(int width,
                                       int height,
                                       int temporal_layers) {
     VideoCodec codec;
     memset(&codec, 0, sizeof(codec));
     EXPECT_EQ(0, VideoCodingModule::Codec(kVideoCodecVP8, &codec));
     codec.width = width;
     codec.height = height;
     codec.codecSpecific.VP8.numberOfTemporalLayers = temporal_layers;
     return codec;
   }

   void InsertFrames(float framerate, float seconds) {
     for (int i = 0; i < seconds * framerate; ++i) {
       clock_.AdvanceTimeMilliseconds(1000.0f / framerate);
       EXPECT_CALL(post_encode_callback_, Encoded(_, NULL, NULL))
           .WillOnce(Return(0));
       AddFrame();
       // SetChannelParameters needs to be called frequently to propagate
       // framerate from the media optimization into the encoder.
       // Note: SetChannelParameters fails if less than 2 frames are in the
       // buffer since it will fail to calculate the framerate.
       if (i != 0) {
         EXPECT_EQ(VCM_OK, sender_->SetChannelParameters(
                               available_bitrate_kbps_ * 1000, 0, 200));
       }
     }
   }

   Vp8StreamInfo SimulateWithFramerate(float framerate) {
     const float short_simulation_interval = 5.0;
     const float long_simulation_interval = 10.0;
     // It appears that this 5 seconds simulation is needed to allow
     // bitrate and framerate to stabilize.
     InsertFrames(framerate, short_simulation_interval);
     packetization_callback_.Reset();

     InsertFrames(framerate, long_simulation_interval);
     return packetization_callback_.CalculateVp8StreamInfo();
   }

  protected:
   VideoCodec codec_;
   int codec_bitrate_kbps_;
   int available_bitrate_kbps_;
 };

 TEST_F(TestVideoSenderWithVp8,
        DISABLED_ON_IOS(DISABLED_ON_ANDROID(FixedTemporalLayersStrategy))) {
   const int low_b = codec_bitrate_kbps_ * kVp8LayerRateAlloction[2][0];
   const int mid_b = codec_bitrate_kbps_ * kVp8LayerRateAlloction[2][1];
   const int high_b = codec_bitrate_kbps_ * kVp8LayerRateAlloction[2][2];
   {
     Vp8StreamInfo expected = {{7.5, 15.0, 30.0}, {low_b, mid_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(30.0), MatchesVp8StreamInfo(expected));
   }
   {
     Vp8StreamInfo expected = {{3.75, 7.5, 15.0}, {low_b, mid_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(15.0), MatchesVp8StreamInfo(expected));
   }
 }

 TEST_F(TestVideoSenderWithVp8,
        DISABLED_ON_IOS(DISABLED_ON_ANDROID(RealTimeTemporalLayersStrategy))) {
   Config extra_options;
   extra_options.Set<TemporalLayers::Factory>(
       new RealTimeTemporalLayersFactory());
   VideoCodec codec = MakeVp8VideoCodec(352, 288, 3);
   codec.extra_options = &extra_options;
   codec.minBitrate = 10;
   codec.startBitrate = codec_bitrate_kbps_;
   codec.maxBitrate = codec_bitrate_kbps_;
   EXPECT_EQ(0, sender_->RegisterSendCodec(&codec, 1, 1200));

   const int low_b = codec_bitrate_kbps_ * 0.4;
   const int mid_b = codec_bitrate_kbps_ * 0.6;
   const int high_b = codec_bitrate_kbps_;

   {
     Vp8StreamInfo expected = {{7.5, 15.0, 30.0}, {low_b, mid_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(30.0), MatchesVp8StreamInfo(expected));
   }
   {
     Vp8StreamInfo expected = {{5.0, 10.0, 20.0}, {low_b, mid_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(20.0), MatchesVp8StreamInfo(expected));
   }
   {
     Vp8StreamInfo expected = {{7.5, 15.0, 15.0}, {mid_b, high_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(15.0), MatchesVp8StreamInfo(expected));
   }
   {
     Vp8StreamInfo expected = {{5.0, 10.0, 10.0}, {mid_b, high_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(10.0), MatchesVp8StreamInfo(expected));
   }
   {
     // TODO(andresp): Find out why this fails with framerate = 7.5
     Vp8StreamInfo expected = {{7.0, 7.0, 7.0}, {high_b, high_b, high_b}};
     EXPECT_THAT(SimulateWithFramerate(7.0), MatchesVp8StreamInfo(expected));
   }
 }
 }  // namespace
 }  // namespace vcm
 }  // namespace webrtc
	/*
	* Copyright (c) 2013 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 <vector>

	#include "testing/gtest/include/gtest/gtest.h"
	#include "webrtc/base/scoped_ptr.h"
	#include "webrtc/common.h"
	#include "webrtc/modules/video_coding/codecs/interface/mock/mock_video_codec_interface.h"
	#include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
	#include "webrtc/modules/video_coding/codecs/vp8/include/vp8_common_types.h"
	#include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
	#include "webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h"
	#include "webrtc/modules/video_coding/main/interface/video_coding.h"
	#include "webrtc/modules/video_coding/main/source/video_coding_impl.h"
	#include "webrtc/modules/video_coding/main/test/test_util.h"
	#include "webrtc/system_wrappers/include/clock.h"
	#include "webrtc/test/frame_generator.h"
	#include "webrtc/test/testsupport/fileutils.h"
	#include "webrtc/test/testsupport/gtest_disable.h"

	using ::testing::_;
	using ::testing::AllOf;
	using ::testing::ElementsAre;
	using ::testing::ElementsAreArray;
	using ::testing::Field;
	using ::testing::NiceMock;
	using ::testing::Pointee;
	using ::testing::Return;
	using ::testing::FloatEq;
	using std::vector;
	using webrtc::test::FrameGenerator;

	namespace webrtc {
	namespace vcm {
	namespace {
	enum {
	kMaxNumberOfTemporalLayers = 3
	};

	struct Vp8StreamInfo {
	float framerate_fps[kMaxNumberOfTemporalLayers];
	int bitrate_kbps[kMaxNumberOfTemporalLayers];
	};

	MATCHER_P(MatchesVp8StreamInfo, expected, "") {
	bool res = true;
	for (int tl = 0; tl < kMaxNumberOfTemporalLayers; ++tl) {
	if (fabs(expected.framerate_fps[tl] - arg.framerate_fps[tl]) > 0.5) {
	*result_listener << " framerate_fps[" << tl
	<< "] = " << arg.framerate_fps[tl] << " (expected "
	<< expected.framerate_fps[tl] << ") ";
	res = false;
	}
	if (abs(expected.bitrate_kbps[tl] - arg.bitrate_kbps[tl]) > 10) {
	*result_listener << " bitrate_kbps[" << tl
	<< "] = " << arg.bitrate_kbps[tl] << " (expected "
	<< expected.bitrate_kbps[tl] << ") ";
	res = false;
	}
	}
	return res;
	}

	class EmptyFrameGenerator : public FrameGenerator {
	public:
	EmptyFrameGenerator(int width, int height) : width_(width), height_(height) {}
	VideoFrame* NextFrame() override {
	frame_.reset(new VideoFrame());
	frame_->CreateEmptyFrame(width_, height_, width_, (width_ + 1) / 2,
	(width_ + 1) / 2);
	return frame_.get();
	}

	private:
	const int width_;
	const int height_;
	rtc::scoped_ptr<VideoFrame> frame_;
	};

	class PacketizationCallback : public VCMPacketizationCallback {
	public:
	PacketizationCallback(Clock* clock)
	: clock_(clock), start_time_ms_(clock_->TimeInMilliseconds()) {}

	virtual ~PacketizationCallback() {}

	int32_t SendData(uint8_t payload_type,
	const EncodedImage& encoded_image,
	const RTPFragmentationHeader& fragmentation_header,
	const RTPVideoHeader* rtp_video_header) override {
	assert(rtp_video_header);
	frame_data_.push_back(FrameData(encoded_image._length, *rtp_video_header));
	return 0;
	}

	void Reset() {
	frame_data_.clear();
	start_time_ms_ = clock_->TimeInMilliseconds();
	}

	float FramerateFpsWithinTemporalLayer(int temporal_layer) {
	return CountFramesWithinTemporalLayer(temporal_layer) *
	(1000.0 / interval_ms());
	}

	float BitrateKbpsWithinTemporalLayer(int temporal_layer) {
	return SumPayloadBytesWithinTemporalLayer(temporal_layer) * 8.0 /
	interval_ms();
	}

	Vp8StreamInfo CalculateVp8StreamInfo() {
	Vp8StreamInfo info;
	for (int tl = 0; tl < 3; ++tl) {
	info.framerate_fps[tl] = FramerateFpsWithinTemporalLayer(tl);
	info.bitrate_kbps[tl] = BitrateKbpsWithinTemporalLayer(tl);
	}
	return info;
	}

	private:
	struct FrameData {
	FrameData() {}

	FrameData(size_t payload_size, const RTPVideoHeader& rtp_video_header)
	: payload_size(payload_size), rtp_video_header(rtp_video_header) {}

	size_t payload_size;
	RTPVideoHeader rtp_video_header;
	};

	int64_t interval_ms() {
	int64_t diff = (clock_->TimeInMilliseconds() - start_time_ms_);
	EXPECT_GT(diff, 0);
	return diff;
	}

	int CountFramesWithinTemporalLayer(int temporal_layer) {
	int frames = 0;
	for (size_t i = 0; i < frame_data_.size(); ++i) {
	EXPECT_EQ(kRtpVideoVp8, frame_data_[i].rtp_video_header.codec);
	const uint8_t temporal_idx =
	frame_data_[i].rtp_video_header.codecHeader.VP8.temporalIdx;
	if (temporal_idx <= temporal_layer \|\| temporal_idx == kNoTemporalIdx)
	frames++;
	}
	return frames;
	}

	size_t SumPayloadBytesWithinTemporalLayer(int temporal_layer) {
	size_t payload_size = 0;
	for (size_t i = 0; i < frame_data_.size(); ++i) {
	EXPECT_EQ(kRtpVideoVp8, frame_data_[i].rtp_video_header.codec);
	const uint8_t temporal_idx =
	frame_data_[i].rtp_video_header.codecHeader.VP8.temporalIdx;
	if (temporal_idx <= temporal_layer \|\| temporal_idx == kNoTemporalIdx)
	payload_size += frame_data_[i].payload_size;
	}
	return payload_size;
	}

	Clock* clock_;
	int64_t start_time_ms_;
	vector<FrameData> frame_data_;
	};

	class TestVideoSender : public ::testing::Test {
	protected:
	// Note: simulated clock starts at 1 seconds, since parts of webrtc use 0 as
	// a special case (e.g. frame rate in media optimization).
	TestVideoSender() : clock_(1000), packetization_callback_(&clock_) {}

	void SetUp() override {
	sender_.reset(
	new VideoSender(&clock_, &post_encode_callback_, nullptr, nullptr));
	EXPECT_EQ(0, sender_->RegisterTransportCallback(&packetization_callback_));
	}

	void AddFrame() {
	assert(generator_.get());
	sender_->AddVideoFrame(*generator_->NextFrame(), NULL, NULL);
	}

	SimulatedClock clock_;
	PacketizationCallback packetization_callback_;
	MockEncodedImageCallback post_encode_callback_;
	// Used by subclassing tests, need to outlive sender_.
	rtc::scoped_ptr<VideoEncoder> encoder_;
	rtc::scoped_ptr<VideoSender> sender_;
	rtc::scoped_ptr<FrameGenerator> generator_;
	};

	class TestVideoSenderWithMockEncoder : public TestVideoSender {
	protected:
	static const int kDefaultWidth = 1280;
	static const int kDefaultHeight = 720;
	static const int kNumberOfStreams = 3;
	static const int kNumberOfLayers = 3;
	static const int kUnusedPayloadType = 10;

	void SetUp() override {
	TestVideoSender::SetUp();
	EXPECT_EQ(
	0,
	sender_->RegisterExternalEncoder(&encoder_, kUnusedPayloadType, false));
	memset(&settings_, 0, sizeof(settings_));
	EXPECT_EQ(0, VideoCodingModule::Codec(kVideoCodecVP8, &settings_));
	settings_.numberOfSimulcastStreams = kNumberOfStreams;
	ConfigureStream(kDefaultWidth / 4,
	kDefaultHeight / 4,
	100,
	&settings_.simulcastStream[0]);
	ConfigureStream(kDefaultWidth / 2,
	kDefaultHeight / 2,
	500,
	&settings_.simulcastStream[1]);
	ConfigureStream(
	kDefaultWidth, kDefaultHeight, 1200, &settings_.simulcastStream[2]);
	settings_.plType = kUnusedPayloadType; // Use the mocked encoder.
	generator_.reset(
	new EmptyFrameGenerator(settings_.width, settings_.height));
	EXPECT_EQ(0, sender_->RegisterSendCodec(&settings_, 1, 1200));
	}

	void TearDown() override { sender_.reset(); }

	void ExpectIntraRequest(int stream) {
	if (stream == -1) {
	// No intra request expected.
	EXPECT_CALL(
	encoder_,
	Encode(_, _, Pointee(ElementsAre(kVideoFrameDelta, kVideoFrameDelta,
	kVideoFrameDelta))))
	.Times(1)
	.WillRepeatedly(Return(0));
	return;
	}
	assert(stream >= 0);
	assert(stream < kNumberOfStreams);
	std::vector<FrameType> frame_types(kNumberOfStreams, kVideoFrameDelta);
	frame_types[stream] = kVideoFrameKey;
	EXPECT_CALL(
	encoder_,
	Encode(_,
	_,
	Pointee(ElementsAreArray(&frame_types[0], frame_types.size()))))
	.Times(1).WillRepeatedly(Return(0));
	}

	static void ConfigureStream(int width,
	int height,
	int max_bitrate,
	SimulcastStream* stream) {
	assert(stream);
	stream->width = width;
	stream->height = height;
	stream->maxBitrate = max_bitrate;
	stream->numberOfTemporalLayers = kNumberOfLayers;
	stream->qpMax = 45;
	}

	VideoCodec settings_;
	NiceMock<MockVideoEncoder> encoder_;
	};

	TEST_F(TestVideoSenderWithMockEncoder, TestIntraRequests) {
	EXPECT_EQ(0, sender_->IntraFrameRequest(0));
	ExpectIntraRequest(0);
	AddFrame();
	ExpectIntraRequest(-1);
	AddFrame();

	EXPECT_EQ(0, sender_->IntraFrameRequest(1));
	ExpectIntraRequest(1);
	AddFrame();
	ExpectIntraRequest(-1);
	AddFrame();

	EXPECT_EQ(0, sender_->IntraFrameRequest(2));
	ExpectIntraRequest(2);
	AddFrame();
	ExpectIntraRequest(-1);
	AddFrame();

	EXPECT_EQ(-1, sender_->IntraFrameRequest(3));
	ExpectIntraRequest(-1);
	AddFrame();

	EXPECT_EQ(-1, sender_->IntraFrameRequest(-1));
	ExpectIntraRequest(-1);
	AddFrame();
	}

	TEST_F(TestVideoSenderWithMockEncoder, TestIntraRequestsInternalCapture) {
	// De-register current external encoder.
	EXPECT_EQ(0,
	sender_->RegisterExternalEncoder(NULL, kUnusedPayloadType, false));
	// Register encoder with internal capture.
	EXPECT_EQ(
	0, sender_->RegisterExternalEncoder(&encoder_, kUnusedPayloadType, true));
	EXPECT_EQ(0, sender_->RegisterSendCodec(&settings_, 1, 1200));
	ExpectIntraRequest(0);
	EXPECT_EQ(0, sender_->IntraFrameRequest(0));
	ExpectIntraRequest(1);
	EXPECT_EQ(0, sender_->IntraFrameRequest(1));
	ExpectIntraRequest(2);
	EXPECT_EQ(0, sender_->IntraFrameRequest(2));
	// No requests expected since these indices are out of bounds.
	EXPECT_EQ(-1, sender_->IntraFrameRequest(3));
	EXPECT_EQ(-1, sender_->IntraFrameRequest(-1));
	}

	TEST_F(TestVideoSenderWithMockEncoder, EncoderFramerateUpdatedViaProcess) {
	sender_->SetChannelParameters(settings_.startBitrate, 0, 200);
	const int64_t kRateStatsWindowMs = 2000;
	const uint32_t kInputFps = 20;
	int64_t start_time = clock_.TimeInMilliseconds();
	while (clock_.TimeInMilliseconds() < start_time + kRateStatsWindowMs) {
	AddFrame();
	clock_.AdvanceTimeMilliseconds(1000 / kInputFps);
	}
	EXPECT_CALL(encoder_, SetRates(_, kInputFps)).Times(1).WillOnce(Return(0));
	sender_->Process();
	AddFrame();
	}

	class TestVideoSenderWithVp8 : public TestVideoSender {
	public:
	TestVideoSenderWithVp8()
	: codec_bitrate_kbps_(300), available_bitrate_kbps_(1000) {}

	void SetUp() override {
	TestVideoSender::SetUp();

	const char* input_video = "foreman_cif";
	const int width = 352;
	const int height = 288;
	generator_.reset(FrameGenerator::CreateFromYuvFile(
	std::vector<std::string>(1, test::ResourcePath(input_video, "yuv")),
	width, height, 1));

	codec_ = MakeVp8VideoCodec(width, height, 3);
	codec_.minBitrate = 10;
	codec_.startBitrate = codec_bitrate_kbps_;
	codec_.maxBitrate = codec_bitrate_kbps_;
	encoder_.reset(VP8Encoder::Create());
	ASSERT_EQ(0, sender_->RegisterExternalEncoder(encoder_.get(), codec_.plType,
	false));
	EXPECT_EQ(0, sender_->RegisterSendCodec(&codec_, 1, 1200));
	}

	static VideoCodec MakeVp8VideoCodec(int width,
	int height,
	int temporal_layers) {
	VideoCodec codec;
	memset(&codec, 0, sizeof(codec));
	EXPECT_EQ(0, VideoCodingModule::Codec(kVideoCodecVP8, &codec));
	codec.width = width;
	codec.height = height;
	codec.codecSpecific.VP8.numberOfTemporalLayers = temporal_layers;
	return codec;
	}

	void InsertFrames(float framerate, float seconds) {
	for (int i = 0; i < seconds * framerate; ++i) {
	clock_.AdvanceTimeMilliseconds(1000.0f / framerate);
	EXPECT_CALL(post_encode_callback_, Encoded(_, NULL, NULL))
	.WillOnce(Return(0));
	AddFrame();
	// SetChannelParameters needs to be called frequently to propagate
	// framerate from the media optimization into the encoder.
	// Note: SetChannelParameters fails if less than 2 frames are in the
	// buffer since it will fail to calculate the framerate.
	if (i != 0) {
	EXPECT_EQ(VCM_OK, sender_->SetChannelParameters(
	available_bitrate_kbps_ * 1000, 0, 200));
	}
	}
	}

	Vp8StreamInfo SimulateWithFramerate(float framerate) {
	const float short_simulation_interval = 5.0;
	const float long_simulation_interval = 10.0;
	// It appears that this 5 seconds simulation is needed to allow
	// bitrate and framerate to stabilize.
	InsertFrames(framerate, short_simulation_interval);
	packetization_callback_.Reset();

	InsertFrames(framerate, long_simulation_interval);
	return packetization_callback_.CalculateVp8StreamInfo();
	}

	protected:
	VideoCodec codec_;
	int codec_bitrate_kbps_;
	int available_bitrate_kbps_;
	};

	TEST_F(TestVideoSenderWithVp8,
	DISABLED_ON_IOS(DISABLED_ON_ANDROID(FixedTemporalLayersStrategy))) {
	const int low_b = codec_bitrate_kbps_ * kVp8LayerRateAlloction[2][0];
	const int mid_b = codec_bitrate_kbps_ * kVp8LayerRateAlloction[2][1];
	const int high_b = codec_bitrate_kbps_ * kVp8LayerRateAlloction[2][2];
	{
	Vp8StreamInfo expected = {{7.5, 15.0, 30.0}, {low_b, mid_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(30.0), MatchesVp8StreamInfo(expected));
	}
	{
	Vp8StreamInfo expected = {{3.75, 7.5, 15.0}, {low_b, mid_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(15.0), MatchesVp8StreamInfo(expected));
	}
	}

	TEST_F(TestVideoSenderWithVp8,
	DISABLED_ON_IOS(DISABLED_ON_ANDROID(RealTimeTemporalLayersStrategy))) {
	Config extra_options;
	extra_options.Set<TemporalLayers::Factory>(
	new RealTimeTemporalLayersFactory());
	VideoCodec codec = MakeVp8VideoCodec(352, 288, 3);
	codec.extra_options = &extra_options;
	codec.minBitrate = 10;
	codec.startBitrate = codec_bitrate_kbps_;
	codec.maxBitrate = codec_bitrate_kbps_;
	EXPECT_EQ(0, sender_->RegisterSendCodec(&codec, 1, 1200));

	const int low_b = codec_bitrate_kbps_ * 0.4;
	const int mid_b = codec_bitrate_kbps_ * 0.6;
	const int high_b = codec_bitrate_kbps_;

	{
	Vp8StreamInfo expected = {{7.5, 15.0, 30.0}, {low_b, mid_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(30.0), MatchesVp8StreamInfo(expected));
	}
	{
	Vp8StreamInfo expected = {{5.0, 10.0, 20.0}, {low_b, mid_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(20.0), MatchesVp8StreamInfo(expected));
	}
	{
	Vp8StreamInfo expected = {{7.5, 15.0, 15.0}, {mid_b, high_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(15.0), MatchesVp8StreamInfo(expected));
	}
	{
	Vp8StreamInfo expected = {{5.0, 10.0, 10.0}, {mid_b, high_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(10.0), MatchesVp8StreamInfo(expected));
	}
	{
	// TODO(andresp): Find out why this fails with framerate = 7.5
	Vp8StreamInfo expected = {{7.0, 7.0, 7.0}, {high_b, high_b, high_b}};
	EXPECT_THAT(SimulateWithFramerate(7.0), MatchesVp8StreamInfo(expected));
	}
	}
	} // namespace
	} // namespace vcm
	} // namespace webrtc