| /* |
| * 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 <memory> |
| #include <vector> |
| |
| #include "webrtc/base/buffer.h" |
| #include "webrtc/base/rate_limiter.h" |
| #include "webrtc/call/mock/mock_rtc_event_log.h" |
| #include "webrtc/modules/rtp_rtcp/include/rtp_cvo.h" |
| #include "webrtc/modules/rtp_rtcp/include/rtp_header_parser.h" |
| #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_format_video_generic.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_header_extension.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_header_extensions.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_sender.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_sender_video.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_utility.h" |
| #include "webrtc/system_wrappers/include/stl_util.h" |
| #include "webrtc/test/gmock.h" |
| #include "webrtc/test/gtest.h" |
| #include "webrtc/test/mock_transport.h" |
| #include "webrtc/typedefs.h" |
| |
| namespace webrtc { |
| |
| namespace { |
| const int kTransmissionTimeOffsetExtensionId = 1; |
| const int kAbsoluteSendTimeExtensionId = 14; |
| const int kTransportSequenceNumberExtensionId = 13; |
| const int kPayload = 100; |
| const int kRtxPayload = 98; |
| const uint32_t kTimestamp = 10; |
| const uint16_t kSeqNum = 33; |
| const int kTimeOffset = 22222; |
| const int kMaxPacketLength = 1500; |
| const uint32_t kAbsoluteSendTime = 0x00aabbcc; |
| const uint8_t kAudioLevel = 0x5a; |
| const uint16_t kTransportSequenceNumber = 0xaabbu; |
| const uint8_t kAudioLevelExtensionId = 9; |
| const int kAudioPayload = 103; |
| const uint64_t kStartTime = 123456789; |
| const size_t kMaxPaddingSize = 224u; |
| const int kVideoRotationExtensionId = 5; |
| const VideoRotation kRotation = kVideoRotation_270; |
| const size_t kGenericHeaderLength = 1; |
| const uint8_t kPayloadData[] = {47, 11, 32, 93, 89}; |
| |
| using ::testing::_; |
| using ::testing::ElementsAreArray; |
| |
| const uint8_t* GetPayloadData(const RTPHeader& rtp_header, |
| const uint8_t* packet) { |
| return packet + rtp_header.headerLength; |
| } |
| |
| size_t GetPayloadDataLength(const RTPHeader& rtp_header, |
| const size_t packet_length) { |
| return packet_length - rtp_header.headerLength - rtp_header.paddingLength; |
| } |
| |
| uint64_t ConvertMsToAbsSendTime(int64_t time_ms) { |
| return (((time_ms << 18) + 500) / 1000) & 0x00ffffff; |
| } |
| |
| class LoopbackTransportTest : public webrtc::Transport { |
| public: |
| LoopbackTransportTest() |
| : packets_sent_(0), |
| last_sent_packet_len_(0), |
| total_bytes_sent_(0), |
| last_sent_packet_(nullptr), |
| last_packet_id_(-1) {} |
| |
| ~LoopbackTransportTest() { |
| STLDeleteContainerPointers(sent_packets_.begin(), sent_packets_.end()); |
| } |
| bool SendRtp(const uint8_t* data, |
| size_t len, |
| const PacketOptions& options) override { |
| packets_sent_++; |
| rtc::Buffer* buffer = |
| new rtc::Buffer(reinterpret_cast<const uint8_t*>(data), len); |
| last_sent_packet_ = buffer->data(); |
| last_sent_packet_len_ = len; |
| last_packet_id_ = options.packet_id; |
| total_bytes_sent_ += len; |
| sent_packets_.push_back(buffer); |
| return true; |
| } |
| bool SendRtcp(const uint8_t* data, size_t len) override { return false; } |
| int packets_sent_; |
| size_t last_sent_packet_len_; |
| size_t total_bytes_sent_; |
| uint8_t* last_sent_packet_; |
| int last_packet_id_; |
| std::vector<rtc::Buffer*> sent_packets_; |
| }; |
| |
| } // namespace |
| |
| class MockRtpPacketSender : public RtpPacketSender { |
| public: |
| MockRtpPacketSender() {} |
| virtual ~MockRtpPacketSender() {} |
| |
| MOCK_METHOD6(InsertPacket, |
| void(Priority priority, |
| uint32_t ssrc, |
| uint16_t sequence_number, |
| int64_t capture_time_ms, |
| size_t bytes, |
| bool retransmission)); |
| }; |
| |
| class MockTransportSequenceNumberAllocator |
| : public TransportSequenceNumberAllocator { |
| public: |
| MOCK_METHOD0(AllocateSequenceNumber, uint16_t()); |
| }; |
| |
| class MockSendPacketObserver : public SendPacketObserver { |
| public: |
| MOCK_METHOD3(OnSendPacket, void(uint16_t, int64_t, uint32_t)); |
| }; |
| |
| class MockTransportFeedbackObserver : public TransportFeedbackObserver { |
| public: |
| MOCK_METHOD3(AddPacket, void(uint16_t, size_t, int)); |
| MOCK_METHOD1(OnTransportFeedback, void(const rtcp::TransportFeedback&)); |
| MOCK_CONST_METHOD0(GetTransportFeedbackVector, std::vector<PacketInfo>()); |
| }; |
| |
| class RtpSenderTest : public ::testing::Test { |
| protected: |
| RtpSenderTest() |
| : fake_clock_(kStartTime), |
| mock_rtc_event_log_(), |
| mock_paced_sender_(), |
| retransmission_rate_limiter_(&fake_clock_, 1000), |
| rtp_sender_(), |
| payload_(kPayload), |
| transport_(), |
| kMarkerBit(true) {} |
| |
| void SetUp() override { SetUpRtpSender(true); } |
| |
| void SetUpRtpSender(bool pacer) { |
| rtp_sender_.reset(new RTPSender( |
| false, &fake_clock_, &transport_, pacer ? &mock_paced_sender_ : nullptr, |
| &seq_num_allocator_, nullptr, nullptr, nullptr, nullptr, |
| &mock_rtc_event_log_, &send_packet_observer_, |
| &retransmission_rate_limiter_)); |
| rtp_sender_->SetSequenceNumber(kSeqNum); |
| rtp_sender_->SetSendPayloadType(kPayload); |
| rtp_sender_->SetTimestampOffset(0); |
| } |
| |
| SimulatedClock fake_clock_; |
| testing::NiceMock<MockRtcEventLog> mock_rtc_event_log_; |
| MockRtpPacketSender mock_paced_sender_; |
| testing::StrictMock<MockTransportSequenceNumberAllocator> seq_num_allocator_; |
| testing::StrictMock<MockSendPacketObserver> send_packet_observer_; |
| testing::StrictMock<MockTransportFeedbackObserver> feedback_observer_; |
| RateLimiter retransmission_rate_limiter_; |
| std::unique_ptr<RTPSender> rtp_sender_; |
| int payload_; |
| LoopbackTransportTest transport_; |
| const bool kMarkerBit; |
| uint8_t packet_[kMaxPacketLength]; |
| |
| void VerifyRTPHeaderCommon(const RTPHeader& rtp_header) { |
| VerifyRTPHeaderCommon(rtp_header, kMarkerBit, 0); |
| } |
| |
| void VerifyRTPHeaderCommon(const RTPHeader& rtp_header, bool marker_bit) { |
| VerifyRTPHeaderCommon(rtp_header, marker_bit, 0); |
| } |
| |
| void VerifyRTPHeaderCommon(const RTPHeader& rtp_header, |
| bool marker_bit, |
| uint8_t number_of_csrcs) { |
| EXPECT_EQ(marker_bit, rtp_header.markerBit); |
| EXPECT_EQ(payload_, rtp_header.payloadType); |
| EXPECT_EQ(kSeqNum, rtp_header.sequenceNumber); |
| EXPECT_EQ(kTimestamp, rtp_header.timestamp); |
| EXPECT_EQ(rtp_sender_->SSRC(), rtp_header.ssrc); |
| EXPECT_EQ(number_of_csrcs, rtp_header.numCSRCs); |
| EXPECT_EQ(0U, rtp_header.paddingLength); |
| } |
| |
| void SendPacket(int64_t capture_time_ms, int payload_length) { |
| uint32_t timestamp = capture_time_ms * 90; |
| int32_t rtp_length = rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, timestamp, capture_time_ms); |
| ASSERT_GE(rtp_length, 0); |
| |
| // Packet should be stored in a send bucket. |
| EXPECT_TRUE(rtp_sender_->SendToNetwork( |
| packet_, payload_length, rtp_length, capture_time_ms, |
| kAllowRetransmission, RtpPacketSender::kNormalPriority)); |
| } |
| |
| void SendGenericPayload() { |
| const uint32_t kTimestamp = 1234; |
| const uint8_t kPayloadType = 127; |
| const int64_t kCaptureTimeMs = fake_clock_.TimeInMilliseconds(); |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "GENERIC"; |
| EXPECT_EQ(0, rtp_sender_->RegisterPayload(payload_name, kPayloadType, 90000, |
| 0, 1500)); |
| |
| EXPECT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameKey, kPayloadType, kTimestamp, kCaptureTimeMs, kPayloadData, |
| sizeof(kPayloadData), nullptr, nullptr, nullptr)); |
| } |
| }; |
| |
| // TODO(pbos): Move tests over from WithoutPacer to RtpSenderTest as this is our |
| // default code path. |
| class RtpSenderTestWithoutPacer : public RtpSenderTest { |
| public: |
| void SetUp() override { SetUpRtpSender(false); } |
| }; |
| |
| class RtpSenderVideoTest : public RtpSenderTest { |
| protected: |
| void SetUp() override { |
| // TODO(pbos): Set up to use pacer. |
| SetUpRtpSender(false); |
| rtp_sender_video_.reset( |
| new RTPSenderVideo(&fake_clock_, rtp_sender_.get())); |
| } |
| std::unique_ptr<RTPSenderVideo> rtp_sender_video_; |
| |
| void VerifyCVOPacket(uint8_t* data, |
| size_t len, |
| bool expect_cvo, |
| RtpHeaderExtensionMap* map, |
| uint16_t seq_num, |
| VideoRotation rotation) { |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(data, len); |
| |
| webrtc::RTPHeader rtp_header; |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, expect_cvo /* marker_bit */, kTimestamp, 0)); |
| if (expect_cvo) { |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), |
| length); |
| } else { |
| ASSERT_EQ(kRtpHeaderSize, length); |
| } |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header, map)); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| EXPECT_EQ(payload_, rtp_header.payloadType); |
| EXPECT_EQ(seq_num, rtp_header.sequenceNumber); |
| EXPECT_EQ(kTimestamp, rtp_header.timestamp); |
| EXPECT_EQ(rtp_sender_->SSRC(), rtp_header.ssrc); |
| EXPECT_EQ(0, rtp_header.numCSRCs); |
| EXPECT_EQ(0U, rtp_header.paddingLength); |
| EXPECT_EQ(rotation, rtp_header.extension.videoRotation); |
| } |
| }; |
| |
| TEST_F(RtpSenderTestWithoutPacer, |
| RegisterRtpTransmissionTimeOffsetHeaderExtension) { |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| EXPECT_EQ(kRtpOneByteHeaderLength + kTransmissionTimeOffsetLength, |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->DeregisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset)); |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, RegisterRtpAbsoluteSendTimeHeaderExtension) { |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| EXPECT_EQ(RtpUtility::Word32Align(kRtpOneByteHeaderLength + |
| kAbsoluteSendTimeLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->DeregisterRtpHeaderExtension( |
| kRtpExtensionAbsoluteSendTime)); |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, RegisterRtpAudioLevelHeaderExtension) { |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| EXPECT_EQ( |
| RtpUtility::Word32Align(kRtpOneByteHeaderLength + kAudioLevelLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, |
| rtp_sender_->DeregisterRtpHeaderExtension(kRtpExtensionAudioLevel)); |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, RegisterRtpHeaderExtensions) { |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| EXPECT_EQ(RtpUtility::Word32Align(kRtpOneByteHeaderLength + |
| kTransmissionTimeOffsetLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| EXPECT_EQ(RtpUtility::Word32Align(kRtpOneByteHeaderLength + |
| kTransmissionTimeOffsetLength + |
| kAbsoluteSendTimeLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| EXPECT_EQ(RtpUtility::Word32Align( |
| kRtpOneByteHeaderLength + kTransmissionTimeOffsetLength + |
| kAbsoluteSendTimeLength + kAudioLevelLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionVideoRotation, kVideoRotationExtensionId)); |
| EXPECT_TRUE(rtp_sender_->ActivateCVORtpHeaderExtension()); |
| EXPECT_EQ(RtpUtility::Word32Align(kRtpOneByteHeaderLength + |
| kTransmissionTimeOffsetLength + |
| kAbsoluteSendTimeLength + |
| kAudioLevelLength + kVideoRotationLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| |
| // Deregister starts. |
| EXPECT_EQ(0, rtp_sender_->DeregisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset)); |
| EXPECT_EQ(RtpUtility::Word32Align(kRtpOneByteHeaderLength + |
| kAbsoluteSendTimeLength + |
| kAudioLevelLength + kVideoRotationLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->DeregisterRtpHeaderExtension( |
| kRtpExtensionAbsoluteSendTime)); |
| EXPECT_EQ(RtpUtility::Word32Align(kRtpOneByteHeaderLength + |
| kAudioLevelLength + kVideoRotationLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, |
| rtp_sender_->DeregisterRtpHeaderExtension(kRtpExtensionAudioLevel)); |
| EXPECT_EQ( |
| RtpUtility::Word32Align(kRtpOneByteHeaderLength + kVideoRotationLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ( |
| 0, rtp_sender_->DeregisterRtpHeaderExtension(kRtpExtensionVideoRotation)); |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, RegisterRtpVideoRotationHeaderExtension) { |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionVideoRotation, kVideoRotationExtensionId)); |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| |
| EXPECT_TRUE(rtp_sender_->ActivateCVORtpHeaderExtension()); |
| EXPECT_EQ( |
| RtpUtility::Word32Align(kRtpOneByteHeaderLength + kVideoRotationLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| EXPECT_EQ( |
| 0, rtp_sender_->DeregisterRtpHeaderExtension(kRtpExtensionVideoRotation)); |
| EXPECT_EQ(0u, rtp_sender_->RtpHeaderExtensionLength()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, AllocatePacketSetCsrc) { |
| // Configure rtp_sender with csrc. |
| std::vector<uint32_t> csrcs; |
| csrcs.push_back(0x23456789); |
| rtp_sender_->SetCsrcs(csrcs); |
| |
| auto packet = rtp_sender_->AllocatePacket(); |
| |
| ASSERT_TRUE(packet); |
| EXPECT_EQ(rtp_sender_->SSRC(), packet->Ssrc()); |
| EXPECT_EQ(csrcs, packet->Csrcs()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, AllocatePacketReserveExtensions) { |
| // Configure rtp_sender with extensions. |
| ASSERT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| ASSERT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| ASSERT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| ASSERT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| ASSERT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionVideoRotation, kVideoRotationExtensionId)); |
| |
| auto packet = rtp_sender_->AllocatePacket(); |
| |
| ASSERT_TRUE(packet); |
| // Preallocate BWE extensions RtpSender set itself. |
| EXPECT_TRUE(packet->HasExtension<TransmissionOffset>()); |
| EXPECT_TRUE(packet->HasExtension<AbsoluteSendTime>()); |
| EXPECT_TRUE(packet->HasExtension<TransportSequenceNumber>()); |
| // Do not allocate media specific extensions. |
| EXPECT_FALSE(packet->HasExtension<AudioLevel>()); |
| EXPECT_FALSE(packet->HasExtension<VideoOrientation>()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, AssignSequenceNumberAdvanceSequenceNumber) { |
| auto packet = rtp_sender_->AllocatePacket(); |
| ASSERT_TRUE(packet); |
| const uint16_t sequence_number = rtp_sender_->SequenceNumber(); |
| |
| EXPECT_TRUE(rtp_sender_->AssignSequenceNumber(packet.get())); |
| |
| EXPECT_EQ(sequence_number, packet->SequenceNumber()); |
| EXPECT_EQ(sequence_number + 1, rtp_sender_->SequenceNumber()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, AssignSequenceNumberFailsOnNotSending) { |
| auto packet = rtp_sender_->AllocatePacket(); |
| ASSERT_TRUE(packet); |
| |
| rtp_sender_->SetSendingMediaStatus(false); |
| EXPECT_FALSE(rtp_sender_->AssignSequenceNumber(packet.get())); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, AssignSequenceNumberMayAllowPadding) { |
| constexpr size_t kPaddingSize = 100; |
| auto packet = rtp_sender_->AllocatePacket(); |
| ASSERT_TRUE(packet); |
| |
| ASSERT_FALSE(rtp_sender_->TimeToSendPadding(kPaddingSize, -1)); |
| packet->SetMarker(false); |
| ASSERT_TRUE(rtp_sender_->AssignSequenceNumber(packet.get())); |
| // Packet without marker bit doesn't allow padding. |
| EXPECT_FALSE(rtp_sender_->TimeToSendPadding(kPaddingSize, -1)); |
| |
| packet->SetMarker(true); |
| ASSERT_TRUE(rtp_sender_->AssignSequenceNumber(packet.get())); |
| // Packet with marker bit allows send padding. |
| EXPECT_TRUE(rtp_sender_->TimeToSendPadding(kPaddingSize, -1)); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, AssignSequenceNumberSetPaddingTimestamps) { |
| constexpr size_t kPaddingSize = 100; |
| auto packet = rtp_sender_->AllocatePacket(); |
| ASSERT_TRUE(packet); |
| packet->SetMarker(true); |
| packet->SetTimestamp(kTimestamp); |
| |
| ASSERT_TRUE(rtp_sender_->AssignSequenceNumber(packet.get())); |
| ASSERT_TRUE(rtp_sender_->TimeToSendPadding(kPaddingSize, -1)); |
| |
| ASSERT_EQ(1u, transport_.sent_packets_.size()); |
| // Parse the padding packet and verify its timestamp. |
| RtpPacketToSend padding_packet(nullptr); |
| ASSERT_TRUE(padding_packet.Parse(transport_.sent_packets_[0]->data(), |
| transport_.sent_packets_[0]->size())); |
| EXPECT_EQ(kTimestamp, padding_packet.Timestamp()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, BuildRTPPacket) { |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize, length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, nullptr); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_FALSE(rtp_header.extension.hasTransmissionTimeOffset); |
| EXPECT_FALSE(rtp_header.extension.hasAbsoluteSendTime); |
| EXPECT_FALSE(rtp_header.extension.hasAudioLevel); |
| EXPECT_EQ(0, rtp_header.extension.transmissionTimeOffset); |
| EXPECT_EQ(0u, rtp_header.extension.absoluteSendTime); |
| EXPECT_FALSE(rtp_header.extension.voiceActivity); |
| EXPECT_EQ(0u, rtp_header.extension.audioLevel); |
| EXPECT_EQ(0u, rtp_header.extension.videoRotation); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, |
| BuildRTPPacketWithTransmissionOffsetExtension) { |
| EXPECT_EQ(0, rtp_sender_->SetTransmissionTimeOffset(kTimeOffset)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasTransmissionTimeOffset); |
| EXPECT_EQ(kTimeOffset, rtp_header.extension.transmissionTimeOffset); |
| |
| // Parse without map extension |
| webrtc::RTPHeader rtp_header2; |
| const bool valid_rtp_header2 = rtp_parser.Parse(&rtp_header2, nullptr); |
| |
| ASSERT_TRUE(valid_rtp_header2); |
| VerifyRTPHeaderCommon(rtp_header2); |
| EXPECT_EQ(length, rtp_header2.headerLength); |
| EXPECT_FALSE(rtp_header2.extension.hasTransmissionTimeOffset); |
| EXPECT_EQ(0, rtp_header2.extension.transmissionTimeOffset); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, |
| BuildRTPPacketWithNegativeTransmissionOffsetExtension) { |
| const int kNegTimeOffset = -500; |
| EXPECT_EQ(0, rtp_sender_->SetTransmissionTimeOffset(kNegTimeOffset)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasTransmissionTimeOffset); |
| EXPECT_EQ(kNegTimeOffset, rtp_header.extension.transmissionTimeOffset); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, BuildRTPPacketWithAbsoluteSendTimeExtension) { |
| EXPECT_EQ(0, rtp_sender_->SetAbsoluteSendTime(kAbsoluteSendTime)); |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionAbsoluteSendTime, kAbsoluteSendTimeExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasAbsoluteSendTime); |
| EXPECT_EQ(kAbsoluteSendTime, rtp_header.extension.absoluteSendTime); |
| |
| // Parse without map extension |
| webrtc::RTPHeader rtp_header2; |
| const bool valid_rtp_header2 = rtp_parser.Parse(&rtp_header2, nullptr); |
| |
| ASSERT_TRUE(valid_rtp_header2); |
| VerifyRTPHeaderCommon(rtp_header2); |
| EXPECT_EQ(length, rtp_header2.headerLength); |
| EXPECT_FALSE(rtp_header2.extension.hasAbsoluteSendTime); |
| EXPECT_EQ(0u, rtp_header2.extension.absoluteSendTime); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, SendsPacketsWithTransportSequenceNumber) { |
| rtp_sender_.reset(new RTPSender( |
| false, &fake_clock_, &transport_, nullptr, |
| &seq_num_allocator_, &feedback_observer_, nullptr, nullptr, nullptr, |
| &mock_rtc_event_log_, &send_packet_observer_, |
| &retransmission_rate_limiter_)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| |
| EXPECT_CALL(seq_num_allocator_, AllocateSequenceNumber()) |
| .WillOnce(testing::Return(kTransportSequenceNumber)); |
| EXPECT_CALL(send_packet_observer_, |
| OnSendPacket(kTransportSequenceNumber, _, _)) |
| .Times(1); |
| EXPECT_CALL(feedback_observer_, |
| AddPacket(kTransportSequenceNumber, |
| sizeof(kPayloadData) + kGenericHeaderLength, |
| PacketInfo::kNotAProbe)) |
| .Times(1); |
| |
| SendGenericPayload(); |
| |
| RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_); |
| webrtc::RTPHeader rtp_header; |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId); |
| EXPECT_TRUE(rtp_parser.Parse(&rtp_header, &map)); |
| EXPECT_TRUE(rtp_header.extension.hasTransportSequenceNumber); |
| EXPECT_EQ(kTransportSequenceNumber, |
| rtp_header.extension.transportSequenceNumber); |
| EXPECT_EQ(transport_.last_packet_id_, |
| rtp_header.extension.transportSequenceNumber); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, NoAllocationIfNotRegistered) { |
| SendGenericPayload(); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, OnSendPacketUpdated) { |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| EXPECT_CALL(seq_num_allocator_, AllocateSequenceNumber()) |
| .WillOnce(testing::Return(kTransportSequenceNumber)); |
| EXPECT_CALL(send_packet_observer_, |
| OnSendPacket(kTransportSequenceNumber, _, _)) |
| .Times(1); |
| |
| SendGenericPayload(); |
| } |
| |
| // Test CVO header extension is only set when marker bit is true. |
| TEST_F(RtpSenderTestWithoutPacer, BuildRTPPacketWithVideoRotation_MarkerBit) { |
| rtp_sender_->SetVideoRotation(kRotation); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionVideoRotation, kVideoRotationExtensionId)); |
| EXPECT_TRUE(rtp_sender_->ActivateCVORtpHeaderExtension()); |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionVideoRotation, kVideoRotationExtensionId); |
| |
| size_t length = static_cast<size_t>( |
| rtp_sender_->BuildRtpHeader(packet_, kPayload, true, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header, &map)); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasVideoRotation); |
| EXPECT_EQ(kRotation, rtp_header.extension.videoRotation); |
| } |
| |
| // Test CVO header extension is not set when marker bit is false. |
| TEST_F(RtpSenderTestWithoutPacer, |
| DISABLED_BuildRTPPacketWithVideoRotation_NoMarkerBit) { |
| rtp_sender_->SetVideoRotation(kRotation); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionVideoRotation, kVideoRotationExtensionId)); |
| EXPECT_TRUE(rtp_sender_->ActivateCVORtpHeaderExtension()); |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionVideoRotation, kVideoRotationExtensionId); |
| |
| size_t length = static_cast<size_t>( |
| rtp_sender_->BuildRtpHeader(packet_, kPayload, false, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize, length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header, &map)); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header, false); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_FALSE(rtp_header.extension.hasVideoRotation); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, BuildRTPPacketWithAudioLevelExtension) { |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| // Updating audio level is done in RTPSenderAudio, so simulate it here. |
| rtp_parser.Parse(&rtp_header); |
| rtp_sender_->UpdateAudioLevel(packet_, length, rtp_header, true, kAudioLevel); |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionAudioLevel, kAudioLevelExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasAudioLevel); |
| EXPECT_TRUE(rtp_header.extension.voiceActivity); |
| EXPECT_EQ(kAudioLevel, rtp_header.extension.audioLevel); |
| |
| // Parse without map extension |
| webrtc::RTPHeader rtp_header2; |
| const bool valid_rtp_header2 = rtp_parser.Parse(&rtp_header2, nullptr); |
| |
| ASSERT_TRUE(valid_rtp_header2); |
| VerifyRTPHeaderCommon(rtp_header2); |
| EXPECT_EQ(length, rtp_header2.headerLength); |
| EXPECT_FALSE(rtp_header2.extension.hasAudioLevel); |
| EXPECT_FALSE(rtp_header2.extension.voiceActivity); |
| EXPECT_EQ(0u, rtp_header2.extension.audioLevel); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, |
| BuildRTPPacketWithCSRCAndAudioLevelExtension) { |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| std::vector<uint32_t> csrcs; |
| csrcs.push_back(0x23456789); |
| rtp_sender_->SetCsrcs(csrcs); |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| // Updating audio level is done in RTPSenderAudio, so simulate it here. |
| rtp_parser.Parse(&rtp_header); |
| EXPECT_TRUE(rtp_sender_->UpdateAudioLevel(packet_, length, rtp_header, true, |
| kAudioLevel)); |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionAudioLevel, kAudioLevelExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header, kMarkerBit, csrcs.size()); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasAudioLevel); |
| EXPECT_TRUE(rtp_header.extension.voiceActivity); |
| EXPECT_EQ(kAudioLevel, rtp_header.extension.audioLevel); |
| EXPECT_EQ(1u, rtp_header.numCSRCs); |
| EXPECT_EQ(csrcs[0], rtp_header.arrOfCSRCs[0]); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, BuildRTPPacketWithHeaderExtensions) { |
| EXPECT_EQ(0, rtp_sender_->SetTransmissionTimeOffset(kTimeOffset)); |
| EXPECT_EQ(0, rtp_sender_->SetAbsoluteSendTime(kAbsoluteSendTime)); |
| EXPECT_EQ(0, |
| rtp_sender_->SetTransportSequenceNumber(kTransportSequenceNumber)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| |
| size_t length = static_cast<size_t>(rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, 0)); |
| ASSERT_EQ(kRtpHeaderSize + rtp_sender_->RtpHeaderExtensionLength(), length); |
| |
| // Verify |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(packet_, length); |
| webrtc::RTPHeader rtp_header; |
| |
| // Updating audio level is done in RTPSenderAudio, so simulate it here. |
| rtp_parser.Parse(&rtp_header); |
| rtp_sender_->UpdateAudioLevel(packet_, length, rtp_header, true, kAudioLevel); |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| map.Register(kRtpExtensionAbsoluteSendTime, kAbsoluteSendTimeExtensionId); |
| map.Register(kRtpExtensionAudioLevel, kAudioLevelExtensionId); |
| map.Register(kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| |
| ASSERT_TRUE(valid_rtp_header); |
| ASSERT_FALSE(rtp_parser.RTCP()); |
| VerifyRTPHeaderCommon(rtp_header); |
| EXPECT_EQ(length, rtp_header.headerLength); |
| EXPECT_TRUE(rtp_header.extension.hasTransmissionTimeOffset); |
| EXPECT_TRUE(rtp_header.extension.hasAbsoluteSendTime); |
| EXPECT_TRUE(rtp_header.extension.hasAudioLevel); |
| EXPECT_TRUE(rtp_header.extension.hasTransportSequenceNumber); |
| EXPECT_EQ(kTimeOffset, rtp_header.extension.transmissionTimeOffset); |
| EXPECT_EQ(kAbsoluteSendTime, rtp_header.extension.absoluteSendTime); |
| EXPECT_TRUE(rtp_header.extension.voiceActivity); |
| EXPECT_EQ(kAudioLevel, rtp_header.extension.audioLevel); |
| EXPECT_EQ(kTransportSequenceNumber, |
| rtp_header.extension.transportSequenceNumber); |
| |
| // Parse without map extension |
| webrtc::RTPHeader rtp_header2; |
| const bool valid_rtp_header2 = rtp_parser.Parse(&rtp_header2, nullptr); |
| |
| ASSERT_TRUE(valid_rtp_header2); |
| VerifyRTPHeaderCommon(rtp_header2); |
| EXPECT_EQ(length, rtp_header2.headerLength); |
| EXPECT_FALSE(rtp_header2.extension.hasTransmissionTimeOffset); |
| EXPECT_FALSE(rtp_header2.extension.hasAbsoluteSendTime); |
| EXPECT_FALSE(rtp_header2.extension.hasAudioLevel); |
| EXPECT_FALSE(rtp_header2.extension.hasTransportSequenceNumber); |
| |
| EXPECT_EQ(0, rtp_header2.extension.transmissionTimeOffset); |
| EXPECT_EQ(0u, rtp_header2.extension.absoluteSendTime); |
| EXPECT_FALSE(rtp_header2.extension.voiceActivity); |
| EXPECT_EQ(0u, rtp_header2.extension.audioLevel); |
| EXPECT_EQ(0u, rtp_header2.extension.transportSequenceNumber); |
| } |
| |
| TEST_F(RtpSenderTest, SendsPacketsWithTransportSequenceNumber) { |
| rtp_sender_.reset(new RTPSender( |
| false, &fake_clock_, &transport_, &mock_paced_sender_, |
| &seq_num_allocator_, &feedback_observer_, nullptr, nullptr, nullptr, |
| &mock_rtc_event_log_, &send_packet_observer_, |
| &retransmission_rate_limiter_)); |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| |
| uint16_t seq_num = 0; |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(_, _, _, _, _, _)) |
| .Times(1).WillRepeatedly(testing::SaveArg<2>(&seq_num)); |
| EXPECT_CALL(seq_num_allocator_, AllocateSequenceNumber()) |
| .WillOnce(testing::Return(kTransportSequenceNumber)); |
| EXPECT_CALL(send_packet_observer_, |
| OnSendPacket(kTransportSequenceNumber, _, _)) |
| .Times(1); |
| const int kProbeClusterId = 1; |
| EXPECT_CALL( |
| feedback_observer_, |
| AddPacket(kTransportSequenceNumber, |
| sizeof(kPayloadData) + kGenericHeaderLength, kProbeClusterId)) |
| .Times(1); |
| |
| SendGenericPayload(); |
| rtp_sender_->TimeToSendPacket(seq_num, fake_clock_.TimeInMilliseconds(), |
| false, kProbeClusterId); |
| |
| RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_); |
| webrtc::RTPHeader rtp_header; |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId); |
| EXPECT_TRUE(rtp_parser.Parse(&rtp_header, &map)); |
| EXPECT_TRUE(rtp_header.extension.hasTransportSequenceNumber); |
| EXPECT_EQ(kTransportSequenceNumber, |
| rtp_header.extension.transportSequenceNumber); |
| EXPECT_EQ(transport_.last_packet_id_, |
| rtp_header.extension.transportSequenceNumber); |
| } |
| |
| TEST_F(RtpSenderTest, TrafficSmoothingWithExtensions) { |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(RtpPacketSender::kNormalPriority, |
| _, kSeqNum, _, _, _)); |
| EXPECT_CALL(mock_rtc_event_log_, |
| LogRtpHeader(PacketDirection::kOutgoingPacket, _, _, _)); |
| |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| int64_t capture_time_ms = fake_clock_.TimeInMilliseconds(); |
| int rtp_length_int = rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, capture_time_ms); |
| ASSERT_NE(-1, rtp_length_int); |
| size_t rtp_length = static_cast<size_t>(rtp_length_int); |
| |
| // Packet should be stored in a send bucket. |
| EXPECT_TRUE(rtp_sender_->SendToNetwork(packet_, 0, rtp_length, |
| capture_time_ms, kAllowRetransmission, |
| RtpPacketSender::kNormalPriority)); |
| |
| EXPECT_EQ(0, transport_.packets_sent_); |
| |
| const int kStoredTimeInMs = 100; |
| fake_clock_.AdvanceTimeMilliseconds(kStoredTimeInMs); |
| |
| rtp_sender_->TimeToSendPacket(kSeqNum, capture_time_ms, false, |
| PacketInfo::kNotAProbe); |
| |
| // Process send bucket. Packet should now be sent. |
| EXPECT_EQ(1, transport_.packets_sent_); |
| EXPECT_EQ(rtp_length, transport_.last_sent_packet_len_); |
| // Parse sent packet. |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| rtp_length); |
| webrtc::RTPHeader rtp_header; |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| map.Register(kRtpExtensionAbsoluteSendTime, kAbsoluteSendTimeExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| ASSERT_TRUE(valid_rtp_header); |
| |
| // Verify transmission time offset. |
| EXPECT_EQ(kStoredTimeInMs * 90, rtp_header.extension.transmissionTimeOffset); |
| uint64_t expected_send_time = |
| ConvertMsToAbsSendTime(fake_clock_.TimeInMilliseconds()); |
| EXPECT_EQ(expected_send_time, rtp_header.extension.absoluteSendTime); |
| } |
| |
| TEST_F(RtpSenderTest, TrafficSmoothingRetransmits) { |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(RtpPacketSender::kNormalPriority, |
| _, kSeqNum, _, _, _)); |
| EXPECT_CALL(mock_rtc_event_log_, |
| LogRtpHeader(PacketDirection::kOutgoingPacket, _, _, _)); |
| |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| int64_t capture_time_ms = fake_clock_.TimeInMilliseconds(); |
| int rtp_length_int = rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, kTimestamp, capture_time_ms); |
| ASSERT_NE(-1, rtp_length_int); |
| size_t rtp_length = static_cast<size_t>(rtp_length_int); |
| |
| // Packet should be stored in a send bucket. |
| EXPECT_TRUE(rtp_sender_->SendToNetwork(packet_, 0, rtp_length, |
| capture_time_ms, kAllowRetransmission, |
| RtpPacketSender::kNormalPriority)); |
| |
| EXPECT_EQ(0, transport_.packets_sent_); |
| |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(RtpPacketSender::kNormalPriority, |
| _, kSeqNum, _, _, _)); |
| |
| const int kStoredTimeInMs = 100; |
| fake_clock_.AdvanceTimeMilliseconds(kStoredTimeInMs); |
| |
| EXPECT_EQ(rtp_length_int, rtp_sender_->ReSendPacket(kSeqNum)); |
| EXPECT_EQ(0, transport_.packets_sent_); |
| |
| rtp_sender_->TimeToSendPacket(kSeqNum, capture_time_ms, false, |
| PacketInfo::kNotAProbe); |
| |
| // Process send bucket. Packet should now be sent. |
| EXPECT_EQ(1, transport_.packets_sent_); |
| EXPECT_EQ(rtp_length, transport_.last_sent_packet_len_); |
| |
| // Parse sent packet. |
| webrtc::RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| rtp_length); |
| webrtc::RTPHeader rtp_header; |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| map.Register(kRtpExtensionAbsoluteSendTime, kAbsoluteSendTimeExtensionId); |
| const bool valid_rtp_header = rtp_parser.Parse(&rtp_header, &map); |
| ASSERT_TRUE(valid_rtp_header); |
| |
| // Verify transmission time offset. |
| EXPECT_EQ(kStoredTimeInMs * 90, rtp_header.extension.transmissionTimeOffset); |
| uint64_t expected_send_time = |
| ConvertMsToAbsSendTime(fake_clock_.TimeInMilliseconds()); |
| EXPECT_EQ(expected_send_time, rtp_header.extension.absoluteSendTime); |
| } |
| |
| // This test sends 1 regular video packet, then 4 padding packets, and then |
| // 1 more regular packet. |
| TEST_F(RtpSenderTest, SendPadding) { |
| // Make all (non-padding) packets go to send queue. |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(RtpPacketSender::kNormalPriority, |
| _, kSeqNum, _, _, _)); |
| EXPECT_CALL(mock_rtc_event_log_, |
| LogRtpHeader(PacketDirection::kOutgoingPacket, _, _, _)) |
| .Times(1 + 4 + 1); |
| |
| uint16_t seq_num = kSeqNum; |
| uint32_t timestamp = kTimestamp; |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| size_t rtp_header_len = kRtpHeaderSize; |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId)); |
| rtp_header_len += 4; // 4 bytes extension. |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| rtp_header_len += 4; // 4 bytes extension. |
| rtp_header_len += 4; // 4 extra bytes common to all extension headers. |
| |
| // Create and set up parser. |
| std::unique_ptr<webrtc::RtpHeaderParser> rtp_parser( |
| webrtc::RtpHeaderParser::Create()); |
| ASSERT_TRUE(rtp_parser.get() != nullptr); |
| rtp_parser->RegisterRtpHeaderExtension(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| rtp_parser->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId); |
| webrtc::RTPHeader rtp_header; |
| |
| int64_t capture_time_ms = fake_clock_.TimeInMilliseconds(); |
| int rtp_length_int = rtp_sender_->BuildRtpHeader( |
| packet_, kPayload, kMarkerBit, timestamp, capture_time_ms); |
| const uint32_t media_packet_timestamp = timestamp; |
| ASSERT_NE(-1, rtp_length_int); |
| size_t rtp_length = static_cast<size_t>(rtp_length_int); |
| |
| // Packet should be stored in a send bucket. |
| EXPECT_TRUE(rtp_sender_->SendToNetwork(packet_, 0, rtp_length, |
| capture_time_ms, kAllowRetransmission, |
| RtpPacketSender::kNormalPriority)); |
| |
| int total_packets_sent = 0; |
| EXPECT_EQ(total_packets_sent, transport_.packets_sent_); |
| |
| const int kStoredTimeInMs = 100; |
| fake_clock_.AdvanceTimeMilliseconds(kStoredTimeInMs); |
| rtp_sender_->TimeToSendPacket(seq_num++, capture_time_ms, false, |
| PacketInfo::kNotAProbe); |
| // Packet should now be sent. This test doesn't verify the regular video |
| // packet, since it is tested in another test. |
| EXPECT_EQ(++total_packets_sent, transport_.packets_sent_); |
| timestamp += 90 * kStoredTimeInMs; |
| |
| // Send padding 4 times, waiting 50 ms between each. |
| for (int i = 0; i < 4; ++i) { |
| const int kPaddingPeriodMs = 50; |
| const size_t kPaddingBytes = 100; |
| const size_t kMaxPaddingLength = 224; // Value taken from rtp_sender.cc. |
| // Padding will be forced to full packets. |
| EXPECT_EQ(kMaxPaddingLength, rtp_sender_->TimeToSendPadding( |
| kPaddingBytes, PacketInfo::kNotAProbe)); |
| |
| // Process send bucket. Padding should now be sent. |
| EXPECT_EQ(++total_packets_sent, transport_.packets_sent_); |
| EXPECT_EQ(kMaxPaddingLength + rtp_header_len, |
| transport_.last_sent_packet_len_); |
| // Parse sent packet. |
| ASSERT_TRUE(rtp_parser->Parse(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_, |
| &rtp_header)); |
| EXPECT_EQ(kMaxPaddingLength, rtp_header.paddingLength); |
| |
| // Verify sequence number and timestamp. The timestamp should be the same |
| // as the last media packet. |
| EXPECT_EQ(seq_num++, rtp_header.sequenceNumber); |
| EXPECT_EQ(media_packet_timestamp, rtp_header.timestamp); |
| // Verify transmission time offset. |
| int offset = timestamp - media_packet_timestamp; |
| EXPECT_EQ(offset, rtp_header.extension.transmissionTimeOffset); |
| uint64_t expected_send_time = |
| ConvertMsToAbsSendTime(fake_clock_.TimeInMilliseconds()); |
| EXPECT_EQ(expected_send_time, rtp_header.extension.absoluteSendTime); |
| fake_clock_.AdvanceTimeMilliseconds(kPaddingPeriodMs); |
| timestamp += 90 * kPaddingPeriodMs; |
| } |
| |
| // Send a regular video packet again. |
| capture_time_ms = fake_clock_.TimeInMilliseconds(); |
| rtp_length_int = rtp_sender_->BuildRtpHeader(packet_, kPayload, kMarkerBit, |
| timestamp, capture_time_ms); |
| ASSERT_NE(-1, rtp_length_int); |
| rtp_length = static_cast<size_t>(rtp_length_int); |
| |
| EXPECT_CALL(mock_paced_sender_, |
| InsertPacket(RtpPacketSender::kNormalPriority, _, _, _, _, _)); |
| |
| // Packet should be stored in a send bucket. |
| EXPECT_TRUE(rtp_sender_->SendToNetwork(packet_, 0, rtp_length, |
| capture_time_ms, kAllowRetransmission, |
| RtpPacketSender::kNormalPriority)); |
| |
| rtp_sender_->TimeToSendPacket(seq_num, capture_time_ms, false, |
| PacketInfo::kNotAProbe); |
| // Process send bucket. |
| EXPECT_EQ(++total_packets_sent, transport_.packets_sent_); |
| EXPECT_EQ(rtp_length, transport_.last_sent_packet_len_); |
| // Parse sent packet. |
| ASSERT_TRUE( |
| rtp_parser->Parse(transport_.last_sent_packet_, rtp_length, &rtp_header)); |
| |
| // Verify sequence number and timestamp. |
| EXPECT_EQ(seq_num, rtp_header.sequenceNumber); |
| EXPECT_EQ(timestamp, rtp_header.timestamp); |
| // Verify transmission time offset. This packet is sent without delay. |
| EXPECT_EQ(0, rtp_header.extension.transmissionTimeOffset); |
| uint64_t expected_send_time = |
| ConvertMsToAbsSendTime(fake_clock_.TimeInMilliseconds()); |
| EXPECT_EQ(expected_send_time, rtp_header.extension.absoluteSendTime); |
| } |
| |
| TEST_F(RtpSenderTest, OnSendPacketUpdated) { |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| |
| EXPECT_CALL(send_packet_observer_, |
| OnSendPacket(kTransportSequenceNumber, _, _)) |
| .Times(1); |
| EXPECT_CALL(seq_num_allocator_, AllocateSequenceNumber()) |
| .WillOnce(testing::Return(kTransportSequenceNumber)); |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(_, _, _, _, _, _)).Times(1); |
| |
| SendGenericPayload(); // Packet passed to pacer. |
| const bool kIsRetransmit = false; |
| rtp_sender_->TimeToSendPacket(kSeqNum, fake_clock_.TimeInMilliseconds(), |
| kIsRetransmit, PacketInfo::kNotAProbe); |
| EXPECT_EQ(1, transport_.packets_sent_); |
| } |
| |
| TEST_F(RtpSenderTest, OnSendPacketNotUpdatedForRetransmits) { |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| |
| EXPECT_CALL(send_packet_observer_, OnSendPacket(_, _, _)).Times(0); |
| EXPECT_CALL(seq_num_allocator_, AllocateSequenceNumber()) |
| .WillOnce(testing::Return(kTransportSequenceNumber)); |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(_, _, _, _, _, _)).Times(1); |
| |
| SendGenericPayload(); // Packet passed to pacer. |
| const bool kIsRetransmit = true; |
| rtp_sender_->TimeToSendPacket(kSeqNum, fake_clock_.TimeInMilliseconds(), |
| kIsRetransmit, PacketInfo::kNotAProbe); |
| EXPECT_EQ(1, transport_.packets_sent_); |
| } |
| |
| TEST_F(RtpSenderTest, OnSendPacketNotUpdatedWithoutSeqNumAllocator) { |
| rtp_sender_.reset(new RTPSender( |
| false, &fake_clock_, &transport_, &mock_paced_sender_, |
| nullptr /* TransportSequenceNumberAllocator */, nullptr, nullptr, nullptr, |
| nullptr, nullptr, &send_packet_observer_, &retransmission_rate_limiter_)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionTransportSequenceNumber, |
| kTransportSequenceNumberExtensionId)); |
| rtp_sender_->SetSequenceNumber(kSeqNum); |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| |
| EXPECT_CALL(send_packet_observer_, OnSendPacket(_, _, _)).Times(0); |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(_, _, _, _, _, _)).Times(1); |
| |
| SendGenericPayload(); // Packet passed to pacer. |
| const bool kIsRetransmit = false; |
| rtp_sender_->TimeToSendPacket(kSeqNum, fake_clock_.TimeInMilliseconds(), |
| kIsRetransmit, PacketInfo::kNotAProbe); |
| EXPECT_EQ(1, transport_.packets_sent_); |
| } |
| |
| TEST_F(RtpSenderTest, SendRedundantPayloads) { |
| MockTransport transport; |
| rtp_sender_.reset(new RTPSender( |
| false, &fake_clock_, &transport, &mock_paced_sender_, nullptr, nullptr, |
| nullptr, nullptr, nullptr, &mock_rtc_event_log_, nullptr, |
| &retransmission_rate_limiter_)); |
| |
| rtp_sender_->SetSequenceNumber(kSeqNum); |
| rtp_sender_->SetRtxPayloadType(kRtxPayload, kPayload); |
| |
| uint16_t seq_num = kSeqNum; |
| rtp_sender_->SetStorePacketsStatus(true, 10); |
| int32_t rtp_header_len = kRtpHeaderSize; |
| EXPECT_EQ( |
| 0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId)); |
| rtp_header_len += 4; // 4 bytes extension. |
| rtp_header_len += 4; // 4 extra bytes common to all extension headers. |
| |
| rtp_sender_->SetRtxStatus(kRtxRetransmitted | kRtxRedundantPayloads); |
| rtp_sender_->SetRtxSsrc(1234); |
| |
| // Create and set up parser. |
| std::unique_ptr<webrtc::RtpHeaderParser> rtp_parser( |
| webrtc::RtpHeaderParser::Create()); |
| ASSERT_TRUE(rtp_parser.get() != nullptr); |
| rtp_parser->RegisterRtpHeaderExtension(kRtpExtensionTransmissionTimeOffset, |
| kTransmissionTimeOffsetExtensionId); |
| rtp_parser->RegisterRtpHeaderExtension(kRtpExtensionAbsoluteSendTime, |
| kAbsoluteSendTimeExtensionId); |
| const size_t kNumPayloadSizes = 10; |
| const size_t kPayloadSizes[kNumPayloadSizes] = {500, 550, 600, 650, 700, |
| 750, 800, 850, 900, 950}; |
| // Expect all packets go through the pacer. |
| EXPECT_CALL(mock_paced_sender_, |
| InsertPacket(RtpPacketSender::kNormalPriority, _, _, _, _, _)) |
| .Times(kNumPayloadSizes); |
| EXPECT_CALL(mock_rtc_event_log_, |
| LogRtpHeader(PacketDirection::kOutgoingPacket, _, _, _)) |
| .Times(kNumPayloadSizes); |
| |
| // Send 10 packets of increasing size. |
| for (size_t i = 0; i < kNumPayloadSizes; ++i) { |
| int64_t capture_time_ms = fake_clock_.TimeInMilliseconds(); |
| EXPECT_CALL(transport, SendRtp(_, _, _)).WillOnce(testing::Return(true)); |
| SendPacket(capture_time_ms, kPayloadSizes[i]); |
| rtp_sender_->TimeToSendPacket(seq_num++, capture_time_ms, false, |
| PacketInfo::kNotAProbe); |
| fake_clock_.AdvanceTimeMilliseconds(33); |
| } |
| |
| EXPECT_CALL(mock_rtc_event_log_, |
| LogRtpHeader(PacketDirection::kOutgoingPacket, _, _, _)) |
| .Times(::testing::AtLeast(4)); |
| |
| // The amount of padding to send it too small to send a payload packet. |
| EXPECT_CALL(transport, SendRtp(_, kMaxPaddingSize + rtp_header_len, _)) |
| .WillOnce(testing::Return(true)); |
| EXPECT_EQ(kMaxPaddingSize, |
| rtp_sender_->TimeToSendPadding(49, PacketInfo::kNotAProbe)); |
| |
| EXPECT_CALL(transport, |
| SendRtp(_, kPayloadSizes[0] + rtp_header_len + kRtxHeaderSize, _)) |
| .WillOnce(testing::Return(true)); |
| EXPECT_EQ(kPayloadSizes[0], |
| rtp_sender_->TimeToSendPadding(500, PacketInfo::kNotAProbe)); |
| |
| EXPECT_CALL(transport, SendRtp(_, kPayloadSizes[kNumPayloadSizes - 1] + |
| rtp_header_len + kRtxHeaderSize, |
| _)) |
| .WillOnce(testing::Return(true)); |
| EXPECT_CALL(transport, SendRtp(_, kMaxPaddingSize + rtp_header_len, _)) |
| .WillOnce(testing::Return(true)); |
| EXPECT_EQ(kPayloadSizes[kNumPayloadSizes - 1] + kMaxPaddingSize, |
| rtp_sender_->TimeToSendPadding(999, PacketInfo::kNotAProbe)); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, SendGenericVideo) { |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "GENERIC"; |
| const uint8_t payload_type = 127; |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(payload_name, payload_type, 90000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| |
| // Send keyframe |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData(kVideoFrameKey, payload_type, 1234, |
| 4321, payload, sizeof(payload), |
| nullptr, nullptr, nullptr)); |
| |
| RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_); |
| webrtc::RTPHeader rtp_header; |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header)); |
| |
| const uint8_t* payload_data = |
| GetPayloadData(rtp_header, transport_.last_sent_packet_); |
| uint8_t generic_header = *payload_data++; |
| |
| ASSERT_EQ(sizeof(payload) + sizeof(generic_header), |
| GetPayloadDataLength(rtp_header, transport_.last_sent_packet_len_)); |
| |
| EXPECT_TRUE(generic_header & RtpFormatVideoGeneric::kKeyFrameBit); |
| EXPECT_TRUE(generic_header & RtpFormatVideoGeneric::kFirstPacketBit); |
| |
| EXPECT_EQ(0, memcmp(payload, payload_data, sizeof(payload))); |
| |
| // Send delta frame |
| payload[0] = 13; |
| payload[1] = 42; |
| payload[4] = 13; |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameDelta, payload_type, 1234, 4321, payload, sizeof(payload), |
| nullptr, nullptr, nullptr)); |
| |
| RtpUtility::RtpHeaderParser rtp_parser2(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_); |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header)); |
| |
| payload_data = GetPayloadData(rtp_header, transport_.last_sent_packet_); |
| generic_header = *payload_data++; |
| |
| EXPECT_FALSE(generic_header & RtpFormatVideoGeneric::kKeyFrameBit); |
| EXPECT_TRUE(generic_header & RtpFormatVideoGeneric::kFirstPacketBit); |
| |
| ASSERT_EQ(sizeof(payload) + sizeof(generic_header), |
| GetPayloadDataLength(rtp_header, transport_.last_sent_packet_len_)); |
| |
| EXPECT_EQ(0, memcmp(payload, payload_data, sizeof(payload))); |
| } |
| |
| TEST_F(RtpSenderTest, FrameCountCallbacks) { |
| class TestCallback : public FrameCountObserver { |
| public: |
| TestCallback() : FrameCountObserver(), num_calls_(0), ssrc_(0) {} |
| virtual ~TestCallback() {} |
| |
| void FrameCountUpdated(const FrameCounts& frame_counts, |
| uint32_t ssrc) override { |
| ++num_calls_; |
| ssrc_ = ssrc; |
| frame_counts_ = frame_counts; |
| } |
| |
| uint32_t num_calls_; |
| uint32_t ssrc_; |
| FrameCounts frame_counts_; |
| } callback; |
| |
| rtp_sender_.reset(new RTPSender(false, &fake_clock_, &transport_, |
| &mock_paced_sender_, nullptr, nullptr, |
| nullptr, &callback, nullptr, nullptr, nullptr, |
| &retransmission_rate_limiter_)); |
| |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "GENERIC"; |
| const uint8_t payload_type = 127; |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(payload_name, payload_type, 90000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| rtp_sender_->SetStorePacketsStatus(true, 1); |
| uint32_t ssrc = rtp_sender_->SSRC(); |
| |
| EXPECT_CALL(mock_paced_sender_, InsertPacket(_, _, _, _, _, _)) |
| .Times(::testing::AtLeast(2)); |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData(kVideoFrameKey, payload_type, 1234, |
| 4321, payload, sizeof(payload), |
| nullptr, nullptr, nullptr)); |
| |
| EXPECT_EQ(1U, callback.num_calls_); |
| EXPECT_EQ(ssrc, callback.ssrc_); |
| EXPECT_EQ(1, callback.frame_counts_.key_frames); |
| EXPECT_EQ(0, callback.frame_counts_.delta_frames); |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameDelta, payload_type, 1234, 4321, payload, sizeof(payload), |
| nullptr, nullptr, nullptr)); |
| |
| EXPECT_EQ(2U, callback.num_calls_); |
| EXPECT_EQ(ssrc, callback.ssrc_); |
| EXPECT_EQ(1, callback.frame_counts_.key_frames); |
| EXPECT_EQ(1, callback.frame_counts_.delta_frames); |
| |
| rtp_sender_.reset(); |
| } |
| |
| TEST_F(RtpSenderTest, BitrateCallbacks) { |
| class TestCallback : public BitrateStatisticsObserver { |
| public: |
| TestCallback() |
| : BitrateStatisticsObserver(), |
| num_calls_(0), |
| ssrc_(0), |
| total_bitrate_(0), |
| retransmit_bitrate_(0) {} |
| virtual ~TestCallback() {} |
| |
| void Notify(uint32_t total_bitrate, |
| uint32_t retransmit_bitrate, |
| uint32_t ssrc) override { |
| ++num_calls_; |
| ssrc_ = ssrc; |
| total_bitrate_ = total_bitrate; |
| retransmit_bitrate_ = retransmit_bitrate; |
| } |
| |
| uint32_t num_calls_; |
| uint32_t ssrc_; |
| uint32_t total_bitrate_; |
| uint32_t retransmit_bitrate_; |
| } callback; |
| rtp_sender_.reset(new RTPSender( |
| false, &fake_clock_, &transport_, nullptr, nullptr, nullptr, &callback, |
| nullptr, nullptr, nullptr, nullptr, &retransmission_rate_limiter_)); |
| |
| // Simulate kNumPackets sent with kPacketInterval ms intervals, with the |
| // number of packets selected so that we fill (but don't overflow) the one |
| // second averaging window. |
| const uint32_t kWindowSizeMs = 1000; |
| const uint32_t kPacketInterval = 20; |
| const uint32_t kNumPackets = |
| (kWindowSizeMs - kPacketInterval) / kPacketInterval; |
| // Overhead = 12 bytes RTP header + 1 byte generic header. |
| const uint32_t kPacketOverhead = 13; |
| |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "GENERIC"; |
| const uint8_t payload_type = 127; |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(payload_name, payload_type, 90000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| rtp_sender_->SetStorePacketsStatus(true, 1); |
| uint32_t ssrc = rtp_sender_->SSRC(); |
| |
| // Initial process call so we get a new time window. |
| rtp_sender_->ProcessBitrate(); |
| |
| // Send a few frames. |
| for (uint32_t i = 0; i < kNumPackets; ++i) { |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameKey, payload_type, 1234, 4321, payload, sizeof(payload), |
| nullptr, nullptr, nullptr)); |
| fake_clock_.AdvanceTimeMilliseconds(kPacketInterval); |
| } |
| |
| rtp_sender_->ProcessBitrate(); |
| |
| // We get one call for every stats updated, thus two calls since both the |
| // stream stats and the retransmit stats are updated once. |
| EXPECT_EQ(2u, callback.num_calls_); |
| EXPECT_EQ(ssrc, callback.ssrc_); |
| const uint32_t kTotalPacketSize = kPacketOverhead + sizeof(payload); |
| // Bitrate measured over delta between last and first timestamp, plus one. |
| const uint32_t kExpectedWindowMs = kNumPackets * kPacketInterval + 1; |
| const uint32_t kExpectedBitsAccumulated = kTotalPacketSize * kNumPackets * 8; |
| const uint32_t kExpectedRateBps = |
| (kExpectedBitsAccumulated * 1000 + (kExpectedWindowMs / 2)) / |
| kExpectedWindowMs; |
| EXPECT_EQ(kExpectedRateBps, callback.total_bitrate_); |
| |
| rtp_sender_.reset(); |
| } |
| |
| class RtpSenderAudioTest : public RtpSenderTest { |
| protected: |
| RtpSenderAudioTest() {} |
| |
| void SetUp() override { |
| payload_ = kAudioPayload; |
| rtp_sender_.reset(new RTPSender( |
| true, &fake_clock_, &transport_, nullptr, nullptr, nullptr, nullptr, |
| nullptr, nullptr, nullptr, nullptr, &retransmission_rate_limiter_)); |
| rtp_sender_->SetSequenceNumber(kSeqNum); |
| } |
| }; |
| |
| TEST_F(RtpSenderTestWithoutPacer, StreamDataCountersCallbacks) { |
| class TestCallback : public StreamDataCountersCallback { |
| public: |
| TestCallback() : StreamDataCountersCallback(), ssrc_(0), counters_() {} |
| virtual ~TestCallback() {} |
| |
| void DataCountersUpdated(const StreamDataCounters& counters, |
| uint32_t ssrc) override { |
| ssrc_ = ssrc; |
| counters_ = counters; |
| } |
| |
| uint32_t ssrc_; |
| StreamDataCounters counters_; |
| |
| void MatchPacketCounter(const RtpPacketCounter& expected, |
| const RtpPacketCounter& actual) { |
| EXPECT_EQ(expected.payload_bytes, actual.payload_bytes); |
| EXPECT_EQ(expected.header_bytes, actual.header_bytes); |
| EXPECT_EQ(expected.padding_bytes, actual.padding_bytes); |
| EXPECT_EQ(expected.packets, actual.packets); |
| } |
| |
| void Matches(uint32_t ssrc, const StreamDataCounters& counters) { |
| EXPECT_EQ(ssrc, ssrc_); |
| MatchPacketCounter(counters.transmitted, counters_.transmitted); |
| MatchPacketCounter(counters.retransmitted, counters_.retransmitted); |
| EXPECT_EQ(counters.fec.packets, counters_.fec.packets); |
| } |
| } callback; |
| |
| const uint8_t kRedPayloadType = 96; |
| const uint8_t kUlpfecPayloadType = 97; |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "GENERIC"; |
| const uint8_t payload_type = 127; |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(payload_name, payload_type, 90000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| rtp_sender_->SetStorePacketsStatus(true, 1); |
| uint32_t ssrc = rtp_sender_->SSRC(); |
| |
| rtp_sender_->RegisterRtpStatisticsCallback(&callback); |
| |
| // Send a frame. |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameKey, payload_type, 1234, 4321, payload, |
| sizeof(payload), nullptr, nullptr, nullptr)); |
| StreamDataCounters expected; |
| expected.transmitted.payload_bytes = 6; |
| expected.transmitted.header_bytes = 12; |
| expected.transmitted.padding_bytes = 0; |
| expected.transmitted.packets = 1; |
| expected.retransmitted.payload_bytes = 0; |
| expected.retransmitted.header_bytes = 0; |
| expected.retransmitted.padding_bytes = 0; |
| expected.retransmitted.packets = 0; |
| expected.fec.packets = 0; |
| callback.Matches(ssrc, expected); |
| |
| // Retransmit a frame. |
| uint16_t seqno = rtp_sender_->SequenceNumber() - 1; |
| rtp_sender_->ReSendPacket(seqno, 0); |
| expected.transmitted.payload_bytes = 12; |
| expected.transmitted.header_bytes = 24; |
| expected.transmitted.packets = 2; |
| expected.retransmitted.payload_bytes = 6; |
| expected.retransmitted.header_bytes = 12; |
| expected.retransmitted.padding_bytes = 0; |
| expected.retransmitted.packets = 1; |
| callback.Matches(ssrc, expected); |
| |
| // Send padding. |
| rtp_sender_->TimeToSendPadding(kMaxPaddingSize, PacketInfo::kNotAProbe); |
| expected.transmitted.payload_bytes = 12; |
| expected.transmitted.header_bytes = 36; |
| expected.transmitted.padding_bytes = kMaxPaddingSize; |
| expected.transmitted.packets = 3; |
| callback.Matches(ssrc, expected); |
| |
| // Send FEC. |
| rtp_sender_->SetGenericFECStatus(true, kRedPayloadType, kUlpfecPayloadType); |
| FecProtectionParams fec_params; |
| fec_params.fec_mask_type = kFecMaskRandom; |
| fec_params.fec_rate = 1; |
| fec_params.max_fec_frames = 1; |
| rtp_sender_->SetFecParameters(&fec_params, &fec_params); |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameDelta, payload_type, 1234, 4321, payload, |
| sizeof(payload), nullptr, nullptr, nullptr)); |
| expected.transmitted.payload_bytes = 40; |
| expected.transmitted.header_bytes = 60; |
| expected.transmitted.packets = 5; |
| expected.fec.packets = 1; |
| callback.Matches(ssrc, expected); |
| |
| rtp_sender_->RegisterRtpStatisticsCallback(nullptr); |
| } |
| |
| TEST_F(RtpSenderAudioTest, SendAudio) { |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "PAYLOAD_NAME"; |
| const uint8_t payload_type = 127; |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(payload_name, payload_type, 48000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kAudioFrameCN, payload_type, 1234, 4321, payload, |
| sizeof(payload), nullptr, nullptr, nullptr)); |
| |
| RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_); |
| webrtc::RTPHeader rtp_header; |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header)); |
| |
| const uint8_t* payload_data = |
| GetPayloadData(rtp_header, transport_.last_sent_packet_); |
| |
| ASSERT_EQ(sizeof(payload), |
| GetPayloadDataLength(rtp_header, transport_.last_sent_packet_len_)); |
| |
| EXPECT_EQ(0, memcmp(payload, payload_data, sizeof(payload))); |
| } |
| |
| TEST_F(RtpSenderAudioTest, SendAudioWithAudioLevelExtension) { |
| EXPECT_EQ(0, rtp_sender_->SetAudioLevel(kAudioLevel)); |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension(kRtpExtensionAudioLevel, |
| kAudioLevelExtensionId)); |
| |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "PAYLOAD_NAME"; |
| const uint8_t payload_type = 127; |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(payload_name, payload_type, 48000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kAudioFrameCN, payload_type, 1234, 4321, payload, |
| sizeof(payload), nullptr, nullptr, nullptr)); |
| |
| RtpUtility::RtpHeaderParser rtp_parser(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_); |
| webrtc::RTPHeader rtp_header; |
| ASSERT_TRUE(rtp_parser.Parse(&rtp_header)); |
| |
| const uint8_t* payload_data = |
| GetPayloadData(rtp_header, transport_.last_sent_packet_); |
| |
| ASSERT_EQ(sizeof(payload), |
| GetPayloadDataLength(rtp_header, transport_.last_sent_packet_len_)); |
| |
| EXPECT_EQ(0, memcmp(payload, payload_data, sizeof(payload))); |
| |
| uint8_t extension[] = { |
| 0xbe, 0xde, 0x00, 0x01, |
| (kAudioLevelExtensionId << 4) + 0, // ID + length. |
| kAudioLevel, // Data. |
| 0x00, 0x00 // Padding. |
| }; |
| |
| EXPECT_EQ(0, memcmp(extension, payload_data - sizeof(extension), |
| sizeof(extension))); |
| } |
| |
| // As RFC4733, named telephone events are carried as part of the audio stream |
| // and must use the same sequence number and timestamp base as the regular |
| // audio channel. |
| // This test checks the marker bit for the first packet and the consequent |
| // packets of the same telephone event. Since it is specifically for DTMF |
| // events, ignoring audio packets and sending kEmptyFrame instead of those. |
| TEST_F(RtpSenderAudioTest, CheckMarkerBitForTelephoneEvents) { |
| char payload_name[RTP_PAYLOAD_NAME_SIZE] = "telephone-event"; |
| uint8_t payload_type = 126; |
| ASSERT_EQ(0, |
| rtp_sender_->RegisterPayload(payload_name, payload_type, 0, 0, 0)); |
| // For Telephone events, payload is not added to the registered payload list, |
| // it will register only the payload used for audio stream. |
| // Registering the payload again for audio stream with different payload name. |
| const char kPayloadName[] = "payload_name"; |
| ASSERT_EQ( |
| 0, rtp_sender_->RegisterPayload(kPayloadName, payload_type, 8000, 1, 0)); |
| int64_t capture_time_ms = fake_clock_.TimeInMilliseconds(); |
| // DTMF event key=9, duration=500 and attenuationdB=10 |
| rtp_sender_->SendTelephoneEvent(9, 500, 10); |
| // During start, it takes the starting timestamp as last sent timestamp. |
| // The duration is calculated as the difference of current and last sent |
| // timestamp. So for first call it will skip since the duration is zero. |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData(kEmptyFrame, payload_type, |
| capture_time_ms, 0, nullptr, 0, |
| nullptr, nullptr, nullptr)); |
| // DTMF Sample Length is (Frequency/1000) * Duration. |
| // So in this case, it is (8000/1000) * 500 = 4000. |
| // Sending it as two packets. |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kEmptyFrame, payload_type, capture_time_ms + 2000, 0, |
| nullptr, 0, nullptr, nullptr, nullptr)); |
| std::unique_ptr<webrtc::RtpHeaderParser> rtp_parser( |
| webrtc::RtpHeaderParser::Create()); |
| ASSERT_TRUE(rtp_parser.get() != nullptr); |
| webrtc::RTPHeader rtp_header; |
| ASSERT_TRUE(rtp_parser->Parse(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_, &rtp_header)); |
| // Marker Bit should be set to 1 for first packet. |
| EXPECT_TRUE(rtp_header.markerBit); |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kEmptyFrame, payload_type, capture_time_ms + 4000, 0, |
| nullptr, 0, nullptr, nullptr, nullptr)); |
| ASSERT_TRUE(rtp_parser->Parse(transport_.last_sent_packet_, |
| transport_.last_sent_packet_len_, &rtp_header)); |
| // Marker Bit should be set to 0 for rest of the packets. |
| EXPECT_FALSE(rtp_header.markerBit); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, BytesReportedCorrectly) { |
| const char* kPayloadName = "GENERIC"; |
| const uint8_t kPayloadType = 127; |
| rtp_sender_->SetSSRC(1234); |
| rtp_sender_->SetRtxSsrc(4321); |
| rtp_sender_->SetRtxPayloadType(kPayloadType - 1, kPayloadType); |
| rtp_sender_->SetRtxStatus(kRtxRetransmitted | kRtxRedundantPayloads); |
| |
| ASSERT_EQ(0, rtp_sender_->RegisterPayload(kPayloadName, kPayloadType, 90000, |
| 0, 1500)); |
| uint8_t payload[] = {47, 11, 32, 93, 89}; |
| |
| ASSERT_TRUE(rtp_sender_->SendOutgoingData( |
| kVideoFrameKey, kPayloadType, 1234, 4321, payload, |
| sizeof(payload), nullptr, nullptr, nullptr)); |
| |
| // Will send 2 full-size padding packets. |
| rtp_sender_->TimeToSendPadding(1, PacketInfo::kNotAProbe); |
| rtp_sender_->TimeToSendPadding(1, PacketInfo::kNotAProbe); |
| |
| StreamDataCounters rtp_stats; |
| StreamDataCounters rtx_stats; |
| rtp_sender_->GetDataCounters(&rtp_stats, &rtx_stats); |
| |
| // Payload + 1-byte generic header. |
| EXPECT_GT(rtp_stats.first_packet_time_ms, -1); |
| EXPECT_EQ(rtp_stats.transmitted.payload_bytes, sizeof(payload) + 1); |
| EXPECT_EQ(rtp_stats.transmitted.header_bytes, 12u); |
| EXPECT_EQ(rtp_stats.transmitted.padding_bytes, 0u); |
| EXPECT_EQ(rtx_stats.transmitted.payload_bytes, 0u); |
| EXPECT_EQ(rtx_stats.transmitted.header_bytes, 24u); |
| EXPECT_EQ(rtx_stats.transmitted.padding_bytes, 2 * kMaxPaddingSize); |
| |
| EXPECT_EQ(rtp_stats.transmitted.TotalBytes(), |
| rtp_stats.transmitted.payload_bytes + |
| rtp_stats.transmitted.header_bytes + |
| rtp_stats.transmitted.padding_bytes); |
| EXPECT_EQ(rtx_stats.transmitted.TotalBytes(), |
| rtx_stats.transmitted.payload_bytes + |
| rtx_stats.transmitted.header_bytes + |
| rtx_stats.transmitted.padding_bytes); |
| |
| EXPECT_EQ( |
| transport_.total_bytes_sent_, |
| rtp_stats.transmitted.TotalBytes() + rtx_stats.transmitted.TotalBytes()); |
| } |
| |
| TEST_F(RtpSenderTestWithoutPacer, RespectsNackBitrateLimit) { |
| const int32_t kPacketSize = 1400; |
| const int32_t kNumPackets = 30; |
| |
| retransmission_rate_limiter_.SetMaxRate(kPacketSize * kNumPackets * 8); |
| |
| rtp_sender_->SetStorePacketsStatus(true, kNumPackets); |
| const uint16_t kStartSequenceNumber = rtp_sender_->SequenceNumber(); |
| std::vector<uint16_t> sequence_numbers; |
| for (int32_t i = 0; i < kNumPackets; ++i) { |
| sequence_numbers.push_back(kStartSequenceNumber + i); |
| fake_clock_.AdvanceTimeMilliseconds(1); |
| SendPacket(fake_clock_.TimeInMilliseconds(), kPacketSize); |
| } |
| EXPECT_EQ(kNumPackets, transport_.packets_sent_); |
| |
| fake_clock_.AdvanceTimeMilliseconds(1000 - kNumPackets); |
| |
| // Resending should work - brings the bandwidth up to the limit. |
| // NACK bitrate is capped to the same bitrate as the encoder, since the max |
| // protection overhead is 50% (see MediaOptimization::SetTargetRates). |
| rtp_sender_->OnReceivedNack(sequence_numbers, 0); |
| EXPECT_EQ(kNumPackets * 2, transport_.packets_sent_); |
| |
| // Must be at least 5ms in between retransmission attempts. |
| fake_clock_.AdvanceTimeMilliseconds(5); |
| |
| // Resending should not work, bandwidth exceeded. |
| rtp_sender_->OnReceivedNack(sequence_numbers, 0); |
| EXPECT_EQ(kNumPackets * 2, transport_.packets_sent_); |
| } |
| |
| // Verify that all packets of a frame have CVO byte set. |
| TEST_F(RtpSenderVideoTest, SendVideoWithCVO) { |
| RTPVideoHeader hdr = {0}; |
| hdr.rotation = kVideoRotation_90; |
| |
| EXPECT_EQ(0, rtp_sender_->RegisterRtpHeaderExtension( |
| kRtpExtensionVideoRotation, kVideoRotationExtensionId)); |
| EXPECT_TRUE(rtp_sender_->ActivateCVORtpHeaderExtension()); |
| |
| EXPECT_EQ( |
| RtpUtility::Word32Align(kRtpOneByteHeaderLength + kVideoRotationLength), |
| rtp_sender_->RtpHeaderExtensionLength()); |
| |
| rtp_sender_video_->SendVideo(kRtpVideoGeneric, kVideoFrameKey, kPayload, |
| kTimestamp, 0, packet_, sizeof(packet_), nullptr, |
| &hdr); |
| |
| RtpHeaderExtensionMap map; |
| map.Register(kRtpExtensionVideoRotation, kVideoRotationExtensionId); |
| |
| // Verify that this packet does have CVO byte. |
| VerifyCVOPacket( |
| reinterpret_cast<uint8_t*>(transport_.sent_packets_[0]->data()), |
| transport_.sent_packets_[0]->size(), true, &map, kSeqNum, hdr.rotation); |
| |
| // Verify that this packet does have CVO byte. |
| VerifyCVOPacket( |
| reinterpret_cast<uint8_t*>(transport_.sent_packets_[1]->data()), |
| transport_.sent_packets_[1]->size(), true, &map, kSeqNum + 1, |
| hdr.rotation); |
| } |
| |
| // Make sure rotation is parsed correctly when the Camera (C) and Flip (F) bits |
| // are set in the CVO byte. |
| TEST_F(RtpSenderVideoTest, SendVideoWithCameraAndFlipCVO) { |
| // Test extracting rotation when Camera (C) and Flip (F) bits are zero. |
| EXPECT_EQ(kVideoRotation_0, ConvertCVOByteToVideoRotation(0)); |
| EXPECT_EQ(kVideoRotation_90, ConvertCVOByteToVideoRotation(1)); |
| EXPECT_EQ(kVideoRotation_180, ConvertCVOByteToVideoRotation(2)); |
| EXPECT_EQ(kVideoRotation_270, ConvertCVOByteToVideoRotation(3)); |
| // Test extracting rotation when Camera (C) and Flip (F) bits are set. |
| const int flip_bit = 1 << 2; |
| const int camera_bit = 1 << 3; |
| EXPECT_EQ(kVideoRotation_0, |
| ConvertCVOByteToVideoRotation(flip_bit | camera_bit | 0)); |
| EXPECT_EQ(kVideoRotation_90, |
| ConvertCVOByteToVideoRotation(flip_bit | camera_bit | 1)); |
| EXPECT_EQ(kVideoRotation_180, |
| ConvertCVOByteToVideoRotation(flip_bit | camera_bit | 2)); |
| EXPECT_EQ(kVideoRotation_270, |
| ConvertCVOByteToVideoRotation(flip_bit | camera_bit | 3)); |
| } |
| |
| } // namespace webrtc |
