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webrtc / src / 14b016fbf9b99c15edc8e9bb4732f7306cc3bad9 / . / pc / peer_connection_media_unittest.cc
blob: b892eacb7833ce2fb2ca0f839be6386378d29f8f [file] [log] [blame]
/*
* Copyright 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// This file contains tests that check the interaction between the
// PeerConnection and the underlying media engine, as well as tests that check
// the media-related aspects of SDP.
#include <algorithm>
#include <functional>
#include <iterator>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <tuple>
#include <type_traits>
#include <utility>
#include <vector>
#include "absl/algorithm/container.h"
#include "absl/types/optional.h"
#include "api/audio_options.h"
#include "api/jsep.h"
#include "api/media_types.h"
#include "api/peer_connection_interface.h"
#include "api/rtc_error.h"
#include "api/rtc_event_log/rtc_event_log_factory.h"
#include "api/rtc_event_log/rtc_event_log_factory_interface.h"
#include "api/rtp_parameters.h"
#include "api/rtp_sender_interface.h"
#include "api/rtp_transceiver_direction.h"
#include "api/rtp_transceiver_interface.h"
#include "api/scoped_refptr.h"
#include "api/task_queue/default_task_queue_factory.h"
#include "api/task_queue/task_queue_factory.h"
#include "media/base/codec.h"
#include "media/base/fake_media_engine.h"
#include "media/base/media_channel.h"
#include "media/base/media_constants.h"
#include "media/base/media_engine.h"
#include "media/base/stream_params.h"
#include "p2p/base/fake_port_allocator.h"
#include "p2p/base/p2p_constants.h"
#include "p2p/base/port_allocator.h"
#include "p2p/base/transport_info.h"
#include "pc/channel_interface.h"
#include "pc/media_session.h"
#include "pc/peer_connection_wrapper.h"
#include "pc/rtp_media_utils.h"
#include "pc/rtp_transceiver.h"
#include "pc/session_description.h"
#include "pc/test/enable_fake_media.h"
#include "pc/test/mock_peer_connection_observers.h"
#include "rtc_base/checks.h"
#include "rtc_base/rtc_certificate_generator.h"
#include "rtc_base/thread.h"
#include "test/gtest.h"
#include "test/scoped_key_value_config.h"
#ifdef WEBRTC_ANDROID
#include "pc/test/android_test_initializer.h"
#endif
#include "rtc_base/virtual_socket_server.h"
#include "test/gmock.h"
namespace webrtc {
using cricket::FakeMediaEngine;
using RTCConfiguration = PeerConnectionInterface::RTCConfiguration;
using RTCOfferAnswerOptions = PeerConnectionInterface::RTCOfferAnswerOptions;
using ::testing::Bool;
using ::testing::Combine;
using ::testing::ElementsAre;
using ::testing::HasSubstr;
using ::testing::NotNull;
using ::testing::Values;
cricket::MediaSendChannelInterface* SendChannelInternal(
rtc::scoped_refptr<RtpTransceiverInterface> transceiver) {
auto transceiver_with_internal = static_cast<
rtc::RefCountedObject<RtpTransceiverProxyWithInternal<RtpTransceiver>>*>(
transceiver.get());
auto transceiver_internal =
static_cast<RtpTransceiver*>(transceiver_with_internal->internal());
return transceiver_internal->channel()->media_send_channel();
}
cricket::MediaReceiveChannelInterface* ReceiveChannelInternal(
rtc::scoped_refptr<RtpTransceiverInterface> transceiver) {
auto transceiver_with_internal = static_cast<
rtc::RefCountedObject<RtpTransceiverProxyWithInternal<RtpTransceiver>>*>(
transceiver.get());
auto transceiver_internal =
static_cast<RtpTransceiver*>(transceiver_with_internal->internal());
return transceiver_internal->channel()->media_receive_channel();
}
cricket::FakeVideoMediaSendChannel* VideoMediaSendChannel(
rtc::scoped_refptr<RtpTransceiverInterface> transceiver) {
return static_cast<cricket::FakeVideoMediaSendChannel*>(
SendChannelInternal(transceiver));
}
cricket::FakeVideoMediaReceiveChannel* VideoMediaReceiveChannel(
rtc::scoped_refptr<RtpTransceiverInterface> transceiver) {
return static_cast<cricket::FakeVideoMediaReceiveChannel*>(
ReceiveChannelInternal(transceiver));
}
cricket::FakeVoiceMediaSendChannel* VoiceMediaSendChannel(
rtc::scoped_refptr<RtpTransceiverInterface> transceiver) {
return static_cast<cricket::FakeVoiceMediaSendChannel*>(
SendChannelInternal(transceiver));
}
cricket::FakeVoiceMediaReceiveChannel* VoiceMediaReceiveChannel(
rtc::scoped_refptr<RtpTransceiverInterface> transceiver) {
return static_cast<cricket::FakeVoiceMediaReceiveChannel*>(
ReceiveChannelInternal(transceiver));
}
class PeerConnectionWrapperForMediaTest : public PeerConnectionWrapper {
public:
using PeerConnectionWrapper::PeerConnectionWrapper;
FakeMediaEngine* media_engine() { return media_engine_; }
void set_media_engine(FakeMediaEngine* media_engine) {
media_engine_ = media_engine;
}
private:
FakeMediaEngine* media_engine_;
};
class PeerConnectionMediaBaseTest : public ::testing::Test {
protected:
typedef std::unique_ptr<PeerConnectionWrapperForMediaTest> WrapperPtr;
explicit PeerConnectionMediaBaseTest(SdpSemantics sdp_semantics)
: vss_(new rtc::VirtualSocketServer()),
main_(vss_.get()),
sdp_semantics_(sdp_semantics) {
#ifdef WEBRTC_ANDROID
InitializeAndroidObjects();
#endif
}
WrapperPtr CreatePeerConnection() {
return CreatePeerConnection(RTCConfiguration());
}
WrapperPtr CreatePeerConnection(const RTCConfiguration& config) {
return CreatePeerConnection(config, std::make_unique<FakeMediaEngine>());
}
WrapperPtr CreatePeerConnection(
std::unique_ptr<FakeMediaEngine> media_engine) {
return CreatePeerConnection(RTCConfiguration(), std::move(media_engine));
}
// Creates PeerConnectionFactory and PeerConnection for given configuration.
WrapperPtr CreatePeerConnection(
const RTCConfiguration& config,
std::unique_ptr<FakeMediaEngine> media_engine) {
auto* media_engine_ptr = media_engine.get();
PeerConnectionFactoryDependencies factory_dependencies;
factory_dependencies.network_thread = rtc::Thread::Current();
factory_dependencies.worker_thread = rtc::Thread::Current();
factory_dependencies.signaling_thread = rtc::Thread::Current();
factory_dependencies.task_queue_factory = CreateDefaultTaskQueueFactory();
EnableFakeMedia(factory_dependencies, std::move(media_engine));
factory_dependencies.event_log_factory =
std::make_unique<RtcEventLogFactory>();
auto pc_factory =
CreateModularPeerConnectionFactory(std::move(factory_dependencies));
auto fake_port_allocator = std::make_unique<cricket::FakePortAllocator>(
rtc::Thread::Current(),
std::make_unique<rtc::BasicPacketSocketFactory>(vss_.get()),
&field_trials_);
auto observer = std::make_unique<MockPeerConnectionObserver>();
auto modified_config = config;
modified_config.sdp_semantics = sdp_semantics_;
PeerConnectionDependencies pc_dependencies(observer.get());
pc_dependencies.allocator = std::move(fake_port_allocator);
auto result = pc_factory->CreatePeerConnectionOrError(
modified_config, std::move(pc_dependencies));
if (!result.ok()) {
return nullptr;
}
auto pc = result.MoveValue();
observer->SetPeerConnectionInterface(pc.get());
auto wrapper = std::make_unique<PeerConnectionWrapperForMediaTest>(
pc_factory, pc, std::move(observer));
wrapper->set_media_engine(media_engine_ptr);
return wrapper;
}
// Accepts the same arguments as CreatePeerConnection and adds default audio
// track (but no video).
template <typename... Args>
WrapperPtr CreatePeerConnectionWithAudio(Args&&... args) {
auto wrapper = CreatePeerConnection(std::forward<Args>(args)...);
if (!wrapper) {
return nullptr;
}
wrapper->AddAudioTrack("a");
return wrapper;
}
// Accepts the same arguments as CreatePeerConnection and adds default video
// track (but no audio).
template <typename... Args>
WrapperPtr CreatePeerConnectionWithVideo(Args&&... args) {
auto wrapper = CreatePeerConnection(std::forward<Args>(args)...);
if (!wrapper) {
return nullptr;
}
wrapper->AddVideoTrack("v");
return wrapper;
}
// Accepts the same arguments as CreatePeerConnection and adds default audio
// and video tracks.
template <typename... Args>
WrapperPtr CreatePeerConnectionWithAudioVideo(Args&&... args) {
auto wrapper = CreatePeerConnection(std::forward<Args>(args)...);
if (!wrapper) {
return nullptr;
}
wrapper->AddAudioTrack("a");
wrapper->AddVideoTrack("v");
return wrapper;
}
RtpTransceiverDirection GetMediaContentDirection(
const SessionDescriptionInterface* sdesc,
cricket::MediaType media_type) {
auto* content =
cricket::GetFirstMediaContent(sdesc->description(), media_type);
RTC_DCHECK(content);
return content->media_description()->direction();
}
bool IsUnifiedPlan() const {
return sdp_semantics_ == SdpSemantics::kUnifiedPlan;
}
test::ScopedKeyValueConfig field_trials_;
std::unique_ptr<rtc::VirtualSocketServer> vss_;
rtc::AutoSocketServerThread main_;
const SdpSemantics sdp_semantics_;
};
class PeerConnectionMediaTest
: public PeerConnectionMediaBaseTest,
public ::testing::WithParamInterface<SdpSemantics> {
protected:
PeerConnectionMediaTest() : PeerConnectionMediaBaseTest(GetParam()) {}
};
class PeerConnectionMediaTestUnifiedPlan : public PeerConnectionMediaBaseTest {
protected:
PeerConnectionMediaTestUnifiedPlan()
: PeerConnectionMediaBaseTest(SdpSemantics::kUnifiedPlan) {}
};
class PeerConnectionMediaTestPlanB : public PeerConnectionMediaBaseTest {
protected:
PeerConnectionMediaTestPlanB()
: PeerConnectionMediaBaseTest(SdpSemantics::kPlanB_DEPRECATED) {}
};
TEST_P(PeerConnectionMediaTest,
FailToSetRemoteDescriptionIfCreateMediaChannelFails) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
callee->media_engine()->set_fail_create_channel(true);
std::string error;
ASSERT_FALSE(callee->SetRemoteDescription(caller->CreateOffer(), &error));
EXPECT_THAT(error,
HasSubstr("Failed to set remote offer sdp: Failed to create"));
}
TEST_P(PeerConnectionMediaTest,
FailToSetLocalDescriptionIfCreateMediaChannelFails) {
auto caller = CreatePeerConnectionWithAudioVideo();
caller->media_engine()->set_fail_create_channel(true);
std::string error;
ASSERT_FALSE(caller->SetLocalDescription(caller->CreateOffer(), &error));
EXPECT_THAT(error,
HasSubstr("Failed to set local offer sdp: Failed to create"));
}
std::vector<std::string> GetIds(
const std::vector<cricket::StreamParams>& streams) {
std::vector<std::string> ids;
ids.reserve(streams.size());
for (const auto& stream : streams) {
ids.push_back(stream.id);
}
return ids;
}
// Test that exchanging an offer and answer with each side having an audio and
// video stream creates the appropriate send/recv streams in the underlying
// media engine on both sides.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
AudioVideoOfferAnswerCreateSendRecvStreams) {
const std::string kCallerAudioId = "caller_a";
const std::string kCallerVideoId = "caller_v";
const std::string kCalleeAudioId = "callee_a";
const std::string kCalleeVideoId = "callee_v";
auto caller = CreatePeerConnection();
caller->AddAudioTrack(kCallerAudioId);
caller->AddVideoTrack(kCallerVideoId);
auto callee = CreatePeerConnection();
callee->AddAudioTrack(kCalleeAudioId);
callee->AddVideoTrack(kCalleeVideoId);
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
ASSERT_TRUE(
caller->SetRemoteDescription(callee->CreateAnswerAndSetAsLocal()));
auto* caller_voice_send =
VoiceMediaSendChannel(caller->pc()->GetTransceivers()[0]);
auto* caller_voice_receive =
VoiceMediaReceiveChannel(caller->pc()->GetTransceivers()[0]);
EXPECT_THAT(GetIds(caller_voice_receive->recv_streams()),
ElementsAre(kCalleeAudioId));
EXPECT_THAT(GetIds(caller_voice_send->send_streams()),
ElementsAre(kCallerAudioId));
auto* caller_video_send =
VideoMediaSendChannel(caller->pc()->GetTransceivers()[1]);
auto* caller_video_receive =
VideoMediaReceiveChannel(caller->pc()->GetTransceivers()[1]);
EXPECT_THAT(GetIds(caller_video_receive->recv_streams()),
ElementsAre(kCalleeVideoId));
EXPECT_THAT(GetIds(caller_video_send->send_streams()),
ElementsAre(kCallerVideoId));
auto* callee_voice_send =
VoiceMediaSendChannel(callee->pc()->GetTransceivers()[0]);
auto* callee_voice_receive =
VoiceMediaReceiveChannel(callee->pc()->GetTransceivers()[0]);
EXPECT_THAT(GetIds(callee_voice_receive->recv_streams()),
ElementsAre(kCallerAudioId));
EXPECT_THAT(GetIds(callee_voice_send->send_streams()),
ElementsAre(kCalleeAudioId));
auto* callee_video_send =
VideoMediaSendChannel(callee->pc()->GetTransceivers()[1]);
auto* callee_video_receive =
VideoMediaReceiveChannel(callee->pc()->GetTransceivers()[1]);
EXPECT_THAT(GetIds(callee_video_receive->recv_streams()),
ElementsAre(kCallerVideoId));
EXPECT_THAT(GetIds(callee_video_send->send_streams()),
ElementsAre(kCalleeVideoId));
}
// Test that stopping the caller transceivers causes the media channels on the
// callee to be destroyed after calling SetRemoteDescription on the generated
// offer.
// See next test for equivalent behavior with Plan B semantics.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
StoppedRemoteTransceiversRemovesMediaChannels) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Stop both audio and video transceivers on the caller.
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
transceivers[0]->StopInternal();
transceivers[1]->StopInternal();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
ASSERT_TRUE(callee->pc()->GetTransceivers().empty());
}
// Test that removing streams from a subsequent offer causes the receive streams
// on the callee to be removed.
// See previous test for equivalent behavior with Unified Plan semantics.
TEST_F(PeerConnectionMediaTestPlanB, EmptyRemoteOfferRemovesRecvStreams) {
auto caller = CreatePeerConnection();
auto caller_audio_track = caller->AddAudioTrack("a");
auto caller_video_track = caller->AddVideoTrack("v");
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Remove both tracks from caller.
caller->pc()->RemoveTrackOrError(caller_audio_track);
caller->pc()->RemoveTrackOrError(caller_video_track);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_TRUE(callee->pc()->GetReceivers().empty());
EXPECT_EQ(2u, callee->pc()->GetSenders().size());
}
// Test enabling of simulcast with Plan B semantics.
// This test creating an offer.
TEST_F(PeerConnectionMediaTestPlanB, SimulcastOffer) {
auto caller = CreatePeerConnection();
auto caller_video_track = caller->AddVideoTrack("v");
RTCOfferAnswerOptions options;
options.num_simulcast_layers = 3;
auto offer = caller->CreateOffer(options);
auto* description = cricket::GetFirstMediaContent(offer->description(),
cricket::MEDIA_TYPE_VIDEO)
->media_description();
ASSERT_EQ(1u, description->streams().size());
ASSERT_TRUE(description->streams()[0].get_ssrc_group("SIM"));
EXPECT_EQ(3u, description->streams()[0].get_ssrc_group("SIM")->ssrcs.size());
// Check that it actually creates simulcast aswell.
caller->SetLocalDescription(std::move(offer));
auto senders = caller->pc()->GetSenders();
ASSERT_EQ(1u, senders.size());
EXPECT_EQ(cricket::MediaType::MEDIA_TYPE_VIDEO, senders[0]->media_type());
EXPECT_EQ(3u, senders[0]->GetParameters().encodings.size());
}
// Test enabling of simulcast with Plan B semantics.
// This test creating an answer.
TEST_F(PeerConnectionMediaTestPlanB, SimulcastAnswer) {
auto caller = CreatePeerConnection();
caller->AddVideoTrack("v0");
auto offer = caller->CreateOffer();
auto callee = CreatePeerConnection();
auto callee_video_track = callee->AddVideoTrack("v1");
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
RTCOfferAnswerOptions options;
options.num_simulcast_layers = 3;
auto answer = callee->CreateAnswer(options);
auto* description = cricket::GetFirstMediaContent(answer->description(),
cricket::MEDIA_TYPE_VIDEO)
->media_description();
ASSERT_EQ(1u, description->streams().size());
ASSERT_TRUE(description->streams()[0].get_ssrc_group("SIM"));
EXPECT_EQ(3u, description->streams()[0].get_ssrc_group("SIM")->ssrcs.size());
// Check that it actually creates simulcast aswell.
callee->SetLocalDescription(std::move(answer));
auto senders = callee->pc()->GetSenders();
ASSERT_EQ(1u, senders.size());
EXPECT_EQ(cricket::MediaType::MEDIA_TYPE_VIDEO, senders[0]->media_type());
EXPECT_EQ(3u, senders[0]->GetParameters().encodings.size());
}
// Test that stopping the callee transceivers causes the media channels to be
// destroyed on the callee after calling SetLocalDescription on the local
// answer.
// See next test for equivalent behavior with Plan B semantics.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
StoppedLocalTransceiversRemovesMediaChannels) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Stop both audio and video transceivers on the callee.
auto transceivers = callee->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
transceivers[0]->StopInternal();
transceivers[1]->StopInternal();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_TRUE(callee->pc()->GetTransceivers().empty());
}
// Test that removing streams from a subsequent answer causes the send streams
// on the callee to be removed when applied locally.
// See previous test for equivalent behavior with Unified Plan semantics.
TEST_F(PeerConnectionMediaTestPlanB, EmptyLocalAnswerRemovesSendStreams) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
auto callee_audio_track = callee->AddAudioTrack("a");
auto callee_video_track = callee->AddVideoTrack("v");
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Remove both tracks from callee.
callee->pc()->RemoveTrackOrError(callee_audio_track);
callee->pc()->RemoveTrackOrError(callee_video_track);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_TRUE(callee->pc()->GetSenders().empty());
EXPECT_EQ(2u, callee->pc()->GetReceivers().size());
}
// Test that a new stream in a subsequent offer causes a new receive stream to
// be created on the callee.
TEST_P(PeerConnectionMediaTest, NewStreamInRemoteOfferAddsRecvStreams) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Add second set of tracks to the caller.
caller->AddAudioTrack("a2");
caller->AddVideoTrack("v2");
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
if (IsUnifiedPlan()) {
auto a1 = VoiceMediaReceiveChannel(callee->pc()->GetTransceivers()[0]);
auto a2 = VoiceMediaReceiveChannel(callee->pc()->GetTransceivers()[2]);
auto v1 = VideoMediaReceiveChannel(callee->pc()->GetTransceivers()[1]);
auto v2 = VideoMediaReceiveChannel(callee->pc()->GetTransceivers()[3]);
ASSERT_TRUE(a1);
EXPECT_EQ(1u, a1->recv_streams().size());
ASSERT_TRUE(a2);
EXPECT_EQ(1u, a2->recv_streams().size());
ASSERT_TRUE(v1);
EXPECT_EQ(1u, v1->recv_streams().size());
ASSERT_TRUE(v2);
EXPECT_EQ(1u, v2->recv_streams().size());
} else {
EXPECT_EQ(4u, callee->pc()->GetReceivers().size());
}
}
// Test that a new stream in a subsequent answer causes a new send stream to be
// created on the callee when added locally.
TEST_P(PeerConnectionMediaTest, NewStreamInLocalAnswerAddsSendStreams) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnectionWithAudioVideo();
RTCOfferAnswerOptions offer_options;
offer_options.offer_to_receive_audio =
RTCOfferAnswerOptions::kOfferToReceiveMediaTrue;
offer_options.offer_to_receive_video =
RTCOfferAnswerOptions::kOfferToReceiveMediaTrue;
RTCOfferAnswerOptions answer_options;
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get(), offer_options,
answer_options));
// Add second set of tracks to the callee.
callee->AddAudioTrack("a2");
callee->AddVideoTrack("v2");
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get(), offer_options,
answer_options));
if (IsUnifiedPlan()) {
auto callee_voice =
VoiceMediaSendChannel(callee->pc()->GetTransceivers()[0]);
ASSERT_TRUE(callee_voice);
auto callee_video =
VideoMediaSendChannel(callee->pc()->GetTransceivers()[1]);
ASSERT_TRUE(callee_video);
EXPECT_EQ(1u, callee_voice->send_streams().size());
EXPECT_EQ(1u, callee_video->send_streams().size());
} else {
EXPECT_EQ(4u, callee->pc()->GetSenders().size());
}
}
// A PeerConnection with no local streams and no explicit answer constraints
// should not reject any offered media sections.
TEST_P(PeerConnectionMediaTest,
CreateAnswerWithNoStreamsAndDefaultOptionsDoesNotReject) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto answer = callee->CreateAnswer();
const auto* audio_content =
cricket::GetFirstAudioContent(answer->description());
ASSERT_TRUE(audio_content);
EXPECT_FALSE(audio_content->rejected);
const auto* video_content =
cricket::GetFirstVideoContent(answer->description());
ASSERT_TRUE(video_content);
EXPECT_FALSE(video_content->rejected);
}
// Test that raw packetization is not set in the offer by default.
TEST_P(PeerConnectionMediaTest, RawPacketizationNotSetInOffer) {
std::vector<cricket::VideoCodec> fake_codecs;
fake_codecs.push_back(cricket::CreateVideoCodec(111, cricket::kVp8CodecName));
fake_codecs.push_back(cricket::CreateVideoRtxCodec(112, 111));
fake_codecs.push_back(cricket::CreateVideoCodec(113, cricket::kVp9CodecName));
fake_codecs.push_back(
cricket::CreateVideoCodec(114, cricket::kH264CodecName));
fake_codecs.push_back(cricket::CreateVideoCodec(115, "HEVC"));
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetVideoCodecs(fake_codecs);
auto caller = CreatePeerConnectionWithVideo(std::move(caller_fake_engine));
auto offer = caller->CreateOfferAndSetAsLocal();
auto* offer_description =
cricket::GetFirstVideoContentDescription(offer->description());
for (const auto& codec : offer_description->codecs()) {
EXPECT_EQ(codec.packetization, absl::nullopt);
}
}
// Test that raw packetization is set in the offer and answer for all
// video payload when raw_packetization_for_video is true.
TEST_P(PeerConnectionMediaTest, RawPacketizationSetInOfferAndAnswer) {
std::vector<cricket::VideoCodec> fake_codecs;
fake_codecs.push_back(cricket::CreateVideoCodec(111, cricket::kVp8CodecName));
fake_codecs.push_back(cricket::CreateVideoRtxCodec(112, 111));
fake_codecs.push_back(cricket::CreateVideoCodec(113, cricket::kVp9CodecName));
fake_codecs.push_back(
cricket::CreateVideoCodec(114, cricket::kH264CodecName));
fake_codecs.push_back(cricket::CreateVideoCodec(115, "HEVC"));
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetVideoCodecs(fake_codecs);
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetVideoCodecs(fake_codecs);
RTCOfferAnswerOptions options;
options.raw_packetization_for_video = true;
auto caller = CreatePeerConnectionWithVideo(std::move(caller_fake_engine));
auto offer = caller->CreateOfferAndSetAsLocal(options);
auto* offer_description =
cricket::GetFirstVideoContentDescription(offer->description());
for (const auto& codec : offer_description->codecs()) {
if (codec.IsMediaCodec()) {
EXPECT_EQ(codec.packetization, cricket::kPacketizationParamRaw);
}
}
auto callee = CreatePeerConnectionWithVideo(std::move(callee_fake_engine));
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
auto answer = callee->CreateAnswerAndSetAsLocal(options);
auto* answer_description =
cricket::GetFirstVideoContentDescription(answer->description());
for (const auto& codec : answer_description->codecs()) {
if (codec.IsMediaCodec()) {
EXPECT_EQ(codec.packetization, cricket::kPacketizationParamRaw);
}
}
ASSERT_TRUE(caller->SetRemoteDescription(std::move(answer)));
}
// Test that raw packetization is not set in the answer when
// raw_packetization_for_video is true if it was not set in the offer.
TEST_P(PeerConnectionMediaTest,
RawPacketizationNotSetInAnswerWhenNotSetInOffer) {
std::vector<cricket::VideoCodec> fake_codecs;
fake_codecs.push_back(cricket::CreateVideoCodec(111, cricket::kVp8CodecName));
fake_codecs.push_back(cricket::CreateVideoRtxCodec(112, 111));
fake_codecs.push_back(cricket::CreateVideoCodec(113, cricket::kVp9CodecName));
fake_codecs.push_back(
cricket::CreateVideoCodec(114, cricket::kH264CodecName));
fake_codecs.push_back(cricket::CreateVideoCodec(115, "HEVC"));
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetVideoCodecs(fake_codecs);
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetVideoCodecs(fake_codecs);
RTCOfferAnswerOptions caller_options;
caller_options.raw_packetization_for_video = false;
RTCOfferAnswerOptions callee_options;
callee_options.raw_packetization_for_video = true;
auto caller = CreatePeerConnectionWithVideo(std::move(caller_fake_engine));
auto offer = caller->CreateOfferAndSetAsLocal(caller_options);
auto callee = CreatePeerConnectionWithVideo(std::move(callee_fake_engine));
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
auto answer = callee->CreateAnswerAndSetAsLocal(callee_options);
auto* answer_description =
cricket::GetFirstVideoContentDescription(answer->description());
for (const auto& codec : answer_description->codecs()) {
EXPECT_EQ(codec.packetization, absl::nullopt);
}
ASSERT_TRUE(caller->SetRemoteDescription(std::move(answer)));
}
class PeerConnectionMediaOfferDirectionTest
: public PeerConnectionMediaBaseTest,
public ::testing::WithParamInterface<
std::tuple<SdpSemantics,
std::tuple<bool, int, RtpTransceiverDirection>>> {
protected:
PeerConnectionMediaOfferDirectionTest()
: PeerConnectionMediaBaseTest(std::get<0>(GetParam())) {
auto param = std::get<1>(GetParam());
send_media_ = std::get<0>(param);
offer_to_receive_ = std::get<1>(param);
expected_direction_ = std::get<2>(param);
}
bool send_media_;
int offer_to_receive_;
RtpTransceiverDirection expected_direction_;
};
// Tests that the correct direction is set on the media description according
// to the presence of a local media track and the offer_to_receive setting.
TEST_P(PeerConnectionMediaOfferDirectionTest, VerifyDirection) {
auto caller = CreatePeerConnection();
if (send_media_) {
caller->AddAudioTrack("a");
}
RTCOfferAnswerOptions options;
options.offer_to_receive_audio = offer_to_receive_;
auto offer = caller->CreateOffer(options);
auto* content = cricket::GetFirstMediaContent(offer->description(),
cricket::MEDIA_TYPE_AUDIO);
if (expected_direction_ == RtpTransceiverDirection::kInactive) {
EXPECT_FALSE(content);
} else {
EXPECT_EQ(expected_direction_, content->media_description()->direction());
}
}
// Note that in these tests, MD_INACTIVE indicates that no media section is
// included in the offer, not that the media direction is inactive.
INSTANTIATE_TEST_SUITE_P(
PeerConnectionMediaTest,
PeerConnectionMediaOfferDirectionTest,
Combine(
Values(SdpSemantics::kPlanB_DEPRECATED, SdpSemantics::kUnifiedPlan),
Values(std::make_tuple(false, -1, RtpTransceiverDirection::kInactive),
std::make_tuple(false, 0, RtpTransceiverDirection::kInactive),
std::make_tuple(false, 1, RtpTransceiverDirection::kRecvOnly),
std::make_tuple(true, -1, RtpTransceiverDirection::kSendRecv),
std::make_tuple(true, 0, RtpTransceiverDirection::kSendOnly),
std::make_tuple(true, 1, RtpTransceiverDirection::kSendRecv))));
class PeerConnectionMediaAnswerDirectionTest
: public PeerConnectionMediaBaseTest,
public ::testing::WithParamInterface<
std::tuple<SdpSemantics, RtpTransceiverDirection, bool, int>> {
protected:
PeerConnectionMediaAnswerDirectionTest()
: PeerConnectionMediaBaseTest(std::get<0>(GetParam())) {
offer_direction_ = std::get<1>(GetParam());
send_media_ = std::get<2>(GetParam());
offer_to_receive_ = std::get<3>(GetParam());
}
RtpTransceiverDirection offer_direction_;
bool send_media_;
int offer_to_receive_;
};
// Tests that the direction in an answer is correct according to direction sent
// in the offer, the presence of a local media track on the receive side and the
// offer_to_receive setting.
TEST_P(PeerConnectionMediaAnswerDirectionTest, VerifyDirection) {
if (IsUnifiedPlan() &&
offer_to_receive_ != RTCOfferAnswerOptions::kUndefined) {
// offer_to_receive_ is not implemented when creating answers with Unified
// Plan semantics specified.
return;
}
auto caller = CreatePeerConnection();
caller->AddAudioTrack("a");
// Create the offer with an audio section and set its direction.
auto offer = caller->CreateOffer();
cricket::GetFirstAudioContentDescription(offer->description())
->set_direction(offer_direction_);
auto callee = CreatePeerConnection();
if (send_media_) {
callee->AddAudioTrack("a");
}
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
// Create the answer according to the test parameters.
RTCOfferAnswerOptions options;
options.offer_to_receive_audio = offer_to_receive_;
auto answer = callee->CreateAnswer(options);
// The expected direction in the answer is the intersection of each side's
// capability to send/recv media.
// For the offerer, the direction is given in the offer (offer_direction_).
// For the answerer, the direction has two components:
// 1. Send if the answerer has a local track to send.
// 2. Receive if the answerer has explicitly set the offer_to_receive to 1 or
// if it has been left as default.
bool offer_send = RtpTransceiverDirectionHasSend(offer_direction_);
bool offer_recv = RtpTransceiverDirectionHasRecv(offer_direction_);
// The negotiated components determine the direction set in the answer.
bool negotiate_send = (send_media_ && offer_recv);
bool negotiate_recv = ((offer_to_receive_ != 0) && offer_send);
auto expected_direction =
RtpTransceiverDirectionFromSendRecv(negotiate_send, negotiate_recv);
EXPECT_EQ(expected_direction,
GetMediaContentDirection(answer.get(), cricket::MEDIA_TYPE_AUDIO));
}
// Tests that the media section is rejected if and only if the callee has no
// local media track and has set offer_to_receive to 0, no matter which
// direction the caller indicated in the offer.
TEST_P(PeerConnectionMediaAnswerDirectionTest, VerifyRejected) {
if (IsUnifiedPlan() &&
offer_to_receive_ != RTCOfferAnswerOptions::kUndefined) {
// offer_to_receive_ is not implemented when creating answers with Unified
// Plan semantics specified.
return;
}
auto caller = CreatePeerConnection();
caller->AddAudioTrack("a");
// Create the offer with an audio section and set its direction.
auto offer = caller->CreateOffer();
cricket::GetFirstAudioContentDescription(offer->description())
->set_direction(offer_direction_);
auto callee = CreatePeerConnection();
if (send_media_) {
callee->AddAudioTrack("a");
}
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
// Create the answer according to the test parameters.
RTCOfferAnswerOptions options;
options.offer_to_receive_audio = offer_to_receive_;
auto answer = callee->CreateAnswer(options);
// The media section is rejected if and only if offer_to_receive is explicitly
// set to 0 and there is no media to send.
auto* audio_content = cricket::GetFirstAudioContent(answer->description());
ASSERT_TRUE(audio_content);
EXPECT_EQ((offer_to_receive_ == 0 && !send_media_), audio_content->rejected);
}
INSTANTIATE_TEST_SUITE_P(PeerConnectionMediaTest,
PeerConnectionMediaAnswerDirectionTest,
Combine(Values(SdpSemantics::kPlanB_DEPRECATED,
SdpSemantics::kUnifiedPlan),
Values(RtpTransceiverDirection::kInactive,
RtpTransceiverDirection::kSendOnly,
RtpTransceiverDirection::kRecvOnly,
RtpTransceiverDirection::kSendRecv),
Bool(),
Values(-1, 0, 1)));
TEST_P(PeerConnectionMediaTest, OfferHasDifferentDirectionForAudioVideo) {
auto caller = CreatePeerConnection();
caller->AddVideoTrack("v");
RTCOfferAnswerOptions options;
options.offer_to_receive_audio = 1;
options.offer_to_receive_video = 0;
auto offer = caller->CreateOffer(options);
EXPECT_EQ(RtpTransceiverDirection::kRecvOnly,
GetMediaContentDirection(offer.get(), cricket::MEDIA_TYPE_AUDIO));
EXPECT_EQ(RtpTransceiverDirection::kSendOnly,
GetMediaContentDirection(offer.get(), cricket::MEDIA_TYPE_VIDEO));
}
TEST_P(PeerConnectionMediaTest, AnswerHasDifferentDirectionsForAudioVideo) {
if (IsUnifiedPlan()) {
// offer_to_receive_ is not implemented when creating answers with Unified
// Plan semantics specified.
return;
}
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
callee->AddVideoTrack("v");
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
RTCOfferAnswerOptions options;
options.offer_to_receive_audio = 1;
options.offer_to_receive_video = 0;
auto answer = callee->CreateAnswer(options);
EXPECT_EQ(RtpTransceiverDirection::kRecvOnly,
GetMediaContentDirection(answer.get(), cricket::MEDIA_TYPE_AUDIO));
EXPECT_EQ(RtpTransceiverDirection::kSendOnly,
GetMediaContentDirection(answer.get(), cricket::MEDIA_TYPE_VIDEO));
}
void AddComfortNoiseCodecsToSend(cricket::FakeMediaEngine* media_engine) {
const cricket::AudioCodec kComfortNoiseCodec8k =
cricket::CreateAudioCodec(102, cricket::kCnCodecName, 8000, 1);
const cricket::AudioCodec kComfortNoiseCodec16k =
cricket::CreateAudioCodec(103, cricket::kCnCodecName, 16000, 1);
auto codecs = media_engine->voice().send_codecs();
codecs.push_back(kComfortNoiseCodec8k);
codecs.push_back(kComfortNoiseCodec16k);
media_engine->SetAudioCodecs(codecs);
}
bool HasAnyComfortNoiseCodecs(const cricket::SessionDescription* desc) {
const auto* audio_desc = cricket::GetFirstAudioContentDescription(desc);
for (const auto& codec : audio_desc->codecs()) {
if (codec.name == cricket::kCnCodecName) {
return true;
}
}
return false;
}
bool HasPayloadTypeConflict(const cricket::SessionDescription* desc) {
std::set<int> payload_types;
const auto* audio_desc = cricket::GetFirstAudioContentDescription(desc);
if (audio_desc) {
for (const auto& codec : audio_desc->codecs()) {
if (payload_types.count(codec.id) > 0) {
return true;
}
payload_types.insert(codec.id);
}
}
const auto* video_desc = cricket::GetFirstVideoContentDescription(desc);
if (video_desc) {
for (const auto& codec : video_desc->codecs()) {
if (payload_types.count(codec.id) > 0) {
return true;
}
payload_types.insert(codec.id);
}
}
return false;
}
TEST_P(PeerConnectionMediaTest,
CreateOfferWithNoVoiceActivityDetectionIncludesNoComfortNoiseCodecs) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
AddComfortNoiseCodecsToSend(fake_engine.get());
auto caller = CreatePeerConnectionWithAudioVideo(std::move(fake_engine));
RTCOfferAnswerOptions options;
options.voice_activity_detection = false;
auto offer = caller->CreateOffer(options);
EXPECT_FALSE(HasAnyComfortNoiseCodecs(offer->description()));
}
TEST_P(PeerConnectionMediaTest,
CreateOfferWithVoiceActivityDetectionIncludesComfortNoiseCodecs) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
AddComfortNoiseCodecsToSend(fake_engine.get());
auto caller = CreatePeerConnectionWithAudioVideo(std::move(fake_engine));
RTCOfferAnswerOptions options;
options.voice_activity_detection = true;
auto offer = caller->CreateOffer(options);
EXPECT_TRUE(HasAnyComfortNoiseCodecs(offer->description()));
}
TEST_P(PeerConnectionMediaTest,
CreateAnswerWithVoiceActivityDetectionIncludesNoComfortNoiseCodecs) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
AddComfortNoiseCodecsToSend(callee_fake_engine.get());
auto callee =
CreatePeerConnectionWithAudioVideo(std::move(callee_fake_engine));
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
RTCOfferAnswerOptions options;
options.voice_activity_detection = true;
auto answer = callee->CreateAnswer(options);
EXPECT_FALSE(HasAnyComfortNoiseCodecs(answer->description()));
}
TEST_P(PeerConnectionMediaTest,
CreateAnswerWithNoVoiceActivityDetectionIncludesNoComfortNoiseCodecs) {
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
AddComfortNoiseCodecsToSend(caller_fake_engine.get());
auto caller =
CreatePeerConnectionWithAudioVideo(std::move(caller_fake_engine));
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
AddComfortNoiseCodecsToSend(callee_fake_engine.get());
auto callee =
CreatePeerConnectionWithAudioVideo(std::move(callee_fake_engine));
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
RTCOfferAnswerOptions options;
options.voice_activity_detection = false;
auto answer = callee->CreateAnswer(options);
EXPECT_FALSE(HasAnyComfortNoiseCodecs(answer->description()));
}
// The following test group verifies that we reject answers with invalid media
// sections as per RFC 3264.
class PeerConnectionMediaInvalidMediaTest
: public PeerConnectionMediaBaseTest,
public ::testing::WithParamInterface<std::tuple<
SdpSemantics,
std::tuple<std::string,
std::function<void(cricket::SessionDescription*)>,
std::string>>> {
protected:
PeerConnectionMediaInvalidMediaTest()
: PeerConnectionMediaBaseTest(std::get<0>(GetParam())) {
auto param = std::get<1>(GetParam());
mutator_ = std::get<1>(param);
expected_error_ = std::get<2>(param);
}
std::function<void(cricket::SessionDescription*)> mutator_;
std::string expected_error_;
};
TEST_P(PeerConnectionMediaInvalidMediaTest, FailToSetRemoteAnswer) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto answer = callee->CreateAnswer();
mutator_(answer->description());
std::string error;
ASSERT_FALSE(caller->SetRemoteDescription(std::move(answer), &error));
EXPECT_EQ("Failed to set remote answer sdp: " + expected_error_, error);
}
TEST_P(PeerConnectionMediaInvalidMediaTest, FailToSetLocalAnswer) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto answer = callee->CreateAnswer();
mutator_(answer->description());
std::string error;
ASSERT_FALSE(callee->SetLocalDescription(std::move(answer), &error));
EXPECT_EQ("Failed to set local answer sdp: " + expected_error_, error);
}
void RemoveVideoContentAndUnbundle(cricket::SessionDescription* desc) {
// Removing BUNDLE is easier than removing the content in there.
desc->RemoveGroupByName("BUNDLE");
auto content_name = cricket::GetFirstVideoContent(desc)->name;
desc->RemoveContentByName(content_name);
desc->RemoveTransportInfoByName(content_name);
}
void RenameVideoContentAndUnbundle(cricket::SessionDescription* desc) {
// Removing BUNDLE is easier than renaming the content in there.
desc->RemoveGroupByName("BUNDLE");
auto* video_content = cricket::GetFirstVideoContent(desc);
auto* transport_info = desc->GetTransportInfoByName(video_content->name);
video_content->name = "video_renamed";
transport_info->content_name = video_content->name;
}
void ReverseMediaContent(cricket::SessionDescription* desc) {
absl::c_reverse(desc->contents());
absl::c_reverse(desc->transport_infos());
}
void ChangeMediaTypeAudioToVideo(cricket::SessionDescription* desc) {
std::string audio_mid = cricket::GetFirstAudioContent(desc)->name;
desc->RemoveContentByName(audio_mid);
auto* video_content = cricket::GetFirstVideoContent(desc);
desc->AddContent(audio_mid, video_content->type,
video_content->media_description()->Clone());
}
constexpr char kMLinesOutOfOrder[] =
"The order of m-lines in answer doesn't match order in offer. Rejecting "
"answer.";
INSTANTIATE_TEST_SUITE_P(
PeerConnectionMediaTest,
PeerConnectionMediaInvalidMediaTest,
Combine(Values(SdpSemantics::kPlanB_DEPRECATED, SdpSemantics::kUnifiedPlan),
Values(std::make_tuple("remove video",
RemoveVideoContentAndUnbundle,
kMLinesOutOfOrder),
std::make_tuple("rename video",
RenameVideoContentAndUnbundle,
kMLinesOutOfOrder),
std::make_tuple("reverse media sections",
ReverseMediaContent,
kMLinesOutOfOrder),
std::make_tuple("change audio type to video type",
ChangeMediaTypeAudioToVideo,
kMLinesOutOfOrder))));
// Tests that if the underlying video encoder fails to be initialized (signaled
// by failing to set send codecs), the PeerConnection signals the error to the
// client.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
MediaEngineErrorPropagatedToClients) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto video_channel =
VideoMediaSendChannel(caller->pc()->GetTransceivers()[1]);
video_channel->set_fail_set_send_codecs(true);
std::string error;
ASSERT_FALSE(caller->SetRemoteDescription(callee->CreateAnswerAndSetAsLocal(),
&error));
EXPECT_EQ(std::string("Failed to set remote answer sdp: Failed to set remote "
"video description "
"send parameters for m-section with mid='") +
(IsUnifiedPlan() ? "1" : "video") + "'.",
error);
}
// Tests that if the underlying video encoder fails once then subsequent
// attempts at setting the local/remote description will also fail, even if
// SetSendCodecs no longer fails.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
FailToApplyDescriptionIfVideoEncoderHasEverFailed) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto video_channel =
VideoMediaSendChannel(caller->pc()->GetTransceivers()[1]);
video_channel->set_fail_set_send_codecs(true);
EXPECT_FALSE(
caller->SetRemoteDescription(callee->CreateAnswerAndSetAsLocal()));
video_channel->set_fail_set_send_codecs(false);
EXPECT_FALSE(caller->SetRemoteDescription(callee->CreateAnswer()));
EXPECT_FALSE(caller->SetLocalDescription(caller->CreateOffer()));
}
void RenameContent(cricket::SessionDescription* desc,
cricket::MediaType media_type,
const std::string& new_name) {
auto* content = cricket::GetFirstMediaContent(desc, media_type);
RTC_DCHECK(content);
std::string old_name = content->name;
content->name = new_name;
auto* transport = desc->GetTransportInfoByName(old_name);
RTC_DCHECK(transport);
transport->content_name = new_name;
// Rename the content name in the BUNDLE group.
cricket::ContentGroup new_bundle_group =
*desc->GetGroupByName(cricket::GROUP_TYPE_BUNDLE);
new_bundle_group.RemoveContentName(old_name);
new_bundle_group.AddContentName(new_name);
desc->RemoveGroupByName(cricket::GROUP_TYPE_BUNDLE);
desc->AddGroup(new_bundle_group);
}
// Tests that an answer responds with the same MIDs as the offer.
TEST_P(PeerConnectionMediaTest, AnswerHasSameMidsAsOffer) {
const std::string kAudioMid = "notdefault1";
const std::string kVideoMid = "notdefault2";
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
auto offer = caller->CreateOffer();
RenameContent(offer->description(), cricket::MEDIA_TYPE_AUDIO, kAudioMid);
RenameContent(offer->description(), cricket::MEDIA_TYPE_VIDEO, kVideoMid);
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
auto answer = callee->CreateAnswer();
EXPECT_EQ(kAudioMid,
cricket::GetFirstAudioContent(answer->description())->name);
EXPECT_EQ(kVideoMid,
cricket::GetFirstVideoContent(answer->description())->name);
}
// Test that if the callee creates a re-offer, the MIDs are the same as the
// original offer.
TEST_P(PeerConnectionMediaTest, ReOfferHasSameMidsAsFirstOffer) {
const std::string kAudioMid = "notdefault1";
const std::string kVideoMid = "notdefault2";
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
auto offer = caller->CreateOffer();
RenameContent(offer->description(), cricket::MEDIA_TYPE_AUDIO, kAudioMid);
RenameContent(offer->description(), cricket::MEDIA_TYPE_VIDEO, kVideoMid);
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
ASSERT_TRUE(callee->SetLocalDescription(callee->CreateAnswer()));
auto reoffer = callee->CreateOffer();
EXPECT_EQ(kAudioMid,
cricket::GetFirstAudioContent(reoffer->description())->name);
EXPECT_EQ(kVideoMid,
cricket::GetFirstVideoContent(reoffer->description())->name);
}
// Test that SetRemoteDescription returns an error if there are two m= sections
// with the same MID value.
TEST_P(PeerConnectionMediaTest, SetRemoteDescriptionFailsWithDuplicateMids) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
auto offer = caller->CreateOffer();
RenameContent(offer->description(), cricket::MEDIA_TYPE_AUDIO, "same");
RenameContent(offer->description(), cricket::MEDIA_TYPE_VIDEO, "same");
std::string error;
EXPECT_FALSE(callee->SetRemoteDescription(std::move(offer), &error));
EXPECT_EQ(error,
"Failed to set remote offer sdp: Duplicate a=mid value 'same'.");
}
// Test that if a RED codec refers to another codec in its fmtp line, but that
// codec's payload type was reassigned for some reason (either the remote
// endpoint selected a different payload type or there was a conflict), the RED
// fmtp line is modified to refer to the correct payload type.
TEST_P(PeerConnectionMediaTest, RedFmtpPayloadTypeReassigned) {
std::vector<cricket::AudioCodec> caller_fake_codecs;
caller_fake_codecs.push_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetAudioCodecs(caller_fake_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(caller_fake_engine));
std::vector<cricket::AudioCodec> callee_fake_codecs;
callee_fake_codecs.push_back(cricket::CreateAudioCodec(120, "foo", 0, 1));
callee_fake_codecs.push_back(
cricket::CreateAudioCodec(121, cricket::kRedCodecName, 0, 1));
callee_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"120/120");
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetAudioCodecs(callee_fake_codecs);
auto callee = CreatePeerConnectionWithAudio(std::move(callee_fake_engine));
// Offer from the caller establishes 100 as the "foo" payload type.
auto offer = caller->CreateOfferAndSetAsLocal();
callee->SetRemoteDescription(std::move(offer));
auto answer = callee->CreateAnswerAndSetAsLocal();
auto answer_description =
cricket::GetFirstAudioContentDescription(answer->description());
ASSERT_EQ(1u, answer_description->codecs().size());
// Offer from the callee should respect the established payload type, and
// attempt to add RED, which should refer to the correct payload type.
offer = callee->CreateOfferAndSetAsLocal();
auto* offer_description =
cricket::GetFirstAudioContentDescription(offer->description());
ASSERT_EQ(2u, offer_description->codecs().size());
for (const auto& codec : offer_description->codecs()) {
if (codec.name == "foo") {
ASSERT_EQ(100, codec.id);
} else if (codec.name == cricket::kRedCodecName) {
std::string fmtp;
ASSERT_TRUE(codec.GetParam("", &fmtp));
EXPECT_EQ("100/100", fmtp);
}
}
}
// Test that RED without fmtp does match RED without fmtp.
TEST_P(PeerConnectionMediaTest, RedFmtpPayloadTypeNoFmtpMatchNoFmtp) {
std::vector<cricket::AudioCodec> caller_fake_codecs;
caller_fake_codecs.push_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
caller_fake_codecs.push_back(
cricket::CreateAudioCodec(101, cricket::kRedCodecName, 0, 1));
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetAudioCodecs(caller_fake_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(caller_fake_engine));
std::vector<cricket::AudioCodec> callee_fake_codecs;
callee_fake_codecs.push_back(cricket::CreateAudioCodec(120, "foo", 0, 1));
callee_fake_codecs.push_back(
cricket::CreateAudioCodec(121, cricket::kRedCodecName, 0, 1));
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetAudioCodecs(callee_fake_codecs);
auto callee = CreatePeerConnectionWithAudio(std::move(callee_fake_engine));
// Offer from the caller establishes 100 as the "foo" payload type.
// Red (without fmtp) is negotiated.
auto offer = caller->CreateOfferAndSetAsLocal();
callee->SetRemoteDescription(std::move(offer));
auto answer = callee->CreateAnswerAndSetAsLocal();
auto answer_description =
cricket::GetFirstAudioContentDescription(answer->description());
ASSERT_EQ(2u, answer_description->codecs().size());
// Offer from the callee should respect the established payload type, and
// attempt to add RED.
offer = callee->CreateOfferAndSetAsLocal();
auto* offer_description =
cricket::GetFirstAudioContentDescription(offer->description());
ASSERT_EQ(2u, offer_description->codecs().size());
for (const auto& codec : offer_description->codecs()) {
if (codec.name == "foo") {
ASSERT_EQ(100, codec.id);
} else if (codec.name == cricket::kRedCodecName) {
ASSERT_EQ(101, codec.id);
}
}
}
// Test that RED without fmtp does not match RED with fmtp.
TEST_P(PeerConnectionMediaTest, RedFmtpPayloadTypeNoFmtpNoMatchFmtp) {
std::vector<cricket::AudioCodec> caller_fake_codecs;
caller_fake_codecs.push_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
caller_fake_codecs.push_back(
cricket::CreateAudioCodec(101, cricket::kRedCodecName, 0, 1));
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetAudioCodecs(caller_fake_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(caller_fake_engine));
std::vector<cricket::AudioCodec> callee_fake_codecs;
callee_fake_codecs.push_back(cricket::CreateAudioCodec(120, "foo", 0, 1));
callee_fake_codecs.push_back(
cricket::CreateAudioCodec(121, cricket::kRedCodecName, 0, 1));
callee_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"120/120");
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetAudioCodecs(callee_fake_codecs);
auto callee = CreatePeerConnectionWithAudio(std::move(callee_fake_engine));
// Offer from the caller establishes 100 as the "foo" payload type.
// It should not negotiate RED.
auto offer = caller->CreateOfferAndSetAsLocal();
callee->SetRemoteDescription(std::move(offer));
auto answer = callee->CreateAnswerAndSetAsLocal();
auto answer_description =
cricket::GetFirstAudioContentDescription(answer->description());
ASSERT_EQ(1u, answer_description->codecs().size());
// Offer from the callee should respect the established payload type, and
// attempt to add RED, which should refer to the correct payload type.
offer = callee->CreateOfferAndSetAsLocal();
auto* offer_description =
cricket::GetFirstAudioContentDescription(offer->description());
ASSERT_EQ(2u, offer_description->codecs().size());
for (const auto& codec : offer_description->codecs()) {
if (codec.name == "foo") {
ASSERT_EQ(100, codec.id);
} else if (codec.name == cricket::kRedCodecName) {
std::string fmtp;
ASSERT_TRUE(
codec.GetParam(cricket::kCodecParamNotInNameValueFormat, &fmtp));
EXPECT_EQ("100/100", fmtp);
}
}
}
// Test that RED with fmtp must match base codecs.
TEST_P(PeerConnectionMediaTest, RedFmtpPayloadTypeMustMatchBaseCodecs) {
std::vector<cricket::AudioCodec> caller_fake_codecs;
caller_fake_codecs.push_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
caller_fake_codecs.push_back(
cricket::CreateAudioCodec(101, cricket::kRedCodecName, 0, 1));
caller_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"100/100");
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetAudioCodecs(caller_fake_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(caller_fake_engine));
std::vector<cricket::AudioCodec> callee_fake_codecs;
callee_fake_codecs.push_back(cricket::CreateAudioCodec(120, "foo", 0, 1));
callee_fake_codecs.push_back(
cricket::CreateAudioCodec(121, cricket::kRedCodecName, 0, 1));
callee_fake_codecs.push_back(cricket::CreateAudioCodec(122, "bar", 0, 1));
callee_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"122/122");
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetAudioCodecs(callee_fake_codecs);
auto callee = CreatePeerConnectionWithAudio(std::move(callee_fake_engine));
// Offer from the caller establishes 100 as the "foo" payload type.
// It should not negotiate RED since RED is associated with foo, not bar.
auto offer = caller->CreateOfferAndSetAsLocal();
callee->SetRemoteDescription(std::move(offer));
auto answer = callee->CreateAnswerAndSetAsLocal();
auto answer_description =
cricket::GetFirstAudioContentDescription(answer->description());
ASSERT_EQ(1u, answer_description->codecs().size());
}
// Test behaviour when the RED fmtp attempts to specify different codecs
// which is not supported.
TEST_P(PeerConnectionMediaTest, RedFmtpPayloadMixed) {
std::vector<cricket::AudioCodec> caller_fake_codecs;
caller_fake_codecs.push_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
caller_fake_codecs.push_back(cricket::CreateAudioCodec(102, "bar", 0, 1));
caller_fake_codecs.push_back(
cricket::CreateAudioCodec(101, cricket::kRedCodecName, 0, 1));
caller_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"100/102");
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetAudioCodecs(caller_fake_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(caller_fake_engine));
std::vector<cricket::AudioCodec> callee_fake_codecs;
callee_fake_codecs.push_back(cricket::CreateAudioCodec(120, "foo", 0, 1));
callee_fake_codecs.push_back(
cricket::CreateAudioCodec(121, cricket::kRedCodecName, 0, 1));
callee_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"120/120");
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetAudioCodecs(callee_fake_codecs);
auto callee = CreatePeerConnectionWithAudio(std::move(callee_fake_engine));
// Offer from the caller establishes 100 as the "foo" payload type.
auto offer = caller->CreateOfferAndSetAsLocal();
callee->SetRemoteDescription(std::move(offer));
auto answer = callee->CreateAnswerAndSetAsLocal();
auto answer_description =
cricket::GetFirstAudioContentDescription(answer->description());
// RED is not negotiated.
ASSERT_EQ(1u, answer_description->codecs().size());
}
// Test behaviour when the RED fmtp attempts to negotiate different levels of
// redundancy.
TEST_P(PeerConnectionMediaTest, RedFmtpPayloadDifferentRedundancy) {
std::vector<cricket::AudioCodec> caller_fake_codecs;
caller_fake_codecs.push_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
caller_fake_codecs.push_back(
cricket::CreateAudioCodec(101, cricket::kRedCodecName, 0, 1));
caller_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"100/100");
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
caller_fake_engine->SetAudioCodecs(caller_fake_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(caller_fake_engine));
std::vector<cricket::AudioCodec> callee_fake_codecs;
callee_fake_codecs.push_back(cricket::CreateAudioCodec(120, "foo", 0, 1));
callee_fake_codecs.push_back(
cricket::CreateAudioCodec(121, cricket::kRedCodecName, 0, 1));
callee_fake_codecs.back().SetParam(cricket::kCodecParamNotInNameValueFormat,
"120/120/120");
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetAudioCodecs(callee_fake_codecs);
auto callee = CreatePeerConnectionWithAudio(std::move(callee_fake_engine));
// Offer from the caller establishes 100 as the "foo" payload type.
auto offer = caller->CreateOfferAndSetAsLocal();
callee->SetRemoteDescription(std::move(offer));
auto answer = callee->CreateAnswerAndSetAsLocal();
auto answer_description =
cricket::GetFirstAudioContentDescription(answer->description());
// RED is negotiated.
ASSERT_EQ(2u, answer_description->codecs().size());
// Offer from the callee should respect the established payload type, and
// attempt to add RED, which should refer to the correct payload type.
offer = callee->CreateOfferAndSetAsLocal();
auto* offer_description =
cricket::GetFirstAudioContentDescription(offer->description());
ASSERT_EQ(2u, offer_description->codecs().size());
for (const auto& codec : offer_description->codecs()) {
if (codec.name == "foo") {
ASSERT_EQ(100, codec.id);
} else if (codec.name == cricket::kRedCodecName) {
std::string fmtp;
ASSERT_TRUE(
codec.GetParam(cricket::kCodecParamNotInNameValueFormat, &fmtp));
EXPECT_EQ("100/100", fmtp);
}
}
}
template <typename C>
bool CompareCodecs(const std::vector<RtpCodecCapability>& capabilities,
const std::vector<C>& codecs) {
bool capability_has_rtx =
absl::c_any_of(capabilities, [](const RtpCodecCapability& codec) {
return codec.name == cricket::kRtxCodecName;
});
bool codecs_has_rtx = absl::c_any_of(codecs, [](const C& codec) {
return codec.name == cricket::kRtxCodecName;
});
std::vector<C> codecs_no_rtx;
absl::c_copy_if(
codecs, std::back_inserter(codecs_no_rtx),
[](const C& codec) { return codec.name != cricket::kRtxCodecName; });
std::vector<RtpCodecCapability> capabilities_no_rtx;
absl::c_copy_if(capabilities, std::back_inserter(capabilities_no_rtx),
[](const RtpCodecCapability& codec) {
return codec.name != cricket::kRtxCodecName;
});
return capability_has_rtx == codecs_has_rtx &&
absl::c_equal(
capabilities_no_rtx, codecs_no_rtx,
[](const RtpCodecCapability& capability, const C& codec) {
return codec.MatchesRtpCodec(capability);
});
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAudioMissingRecvCodec) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
auto send_codecs = fake_engine->voice().send_codecs();
send_codecs.push_back(cricket::CreateAudioCodec(send_codecs.back().id + 1,
"send_only_codec", 0, 1));
fake_engine->SetAudioSendCodecs(send_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(fake_engine));
auto transceiver = caller->pc()->GetTransceivers().front();
auto capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_AUDIO);
std::vector<RtpCodecCapability> codecs;
absl::c_copy_if(capabilities.codecs, std::back_inserter(codecs),
[](const RtpCodecCapability& codec) {
return codec.name.find("_only_") != std::string::npos;
});
auto result = transceiver->SetCodecPreferences(codecs);
EXPECT_EQ(RTCErrorType::INVALID_MODIFICATION, result.type());
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAudioMissingSendCodec) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
auto recv_codecs = fake_engine->voice().recv_codecs();
recv_codecs.push_back(cricket::CreateAudioCodec(recv_codecs.back().id + 1,
"recv_only_codec", 0, 1));
fake_engine->SetAudioRecvCodecs(recv_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(fake_engine));
auto transceiver = caller->pc()->GetTransceivers().front();
auto capabilities = caller->pc_factory()->GetRtpReceiverCapabilities(
cricket::MediaType::MEDIA_TYPE_AUDIO);
std::vector<RtpCodecCapability> codecs;
absl::c_copy_if(capabilities.codecs, std::back_inserter(codecs),
[](const RtpCodecCapability& codec) {
return codec.name.find("_only_") != std::string::npos;
});
auto result = transceiver->SetCodecPreferences(codecs);
EXPECT_EQ(RTCErrorType::INVALID_MODIFICATION, result.type());
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAudioRejectsVideoCodec) {
auto caller = CreatePeerConnectionWithAudio();
auto transceiver = caller->pc()->GetTransceivers().front();
auto video_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MediaType::MEDIA_TYPE_VIDEO)
.codecs;
auto codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MediaType::MEDIA_TYPE_AUDIO)
.codecs;
codecs.insert(codecs.end(), video_codecs.begin(), video_codecs.end());
auto result = transceiver->SetCodecPreferences(codecs);
EXPECT_EQ(RTCErrorType::INVALID_MODIFICATION, result.type());
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAudioRejectsOnlyRtxRedFec) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
auto audio_codecs = fake_engine->voice().send_codecs();
audio_codecs.push_back(cricket::CreateAudioRtxCodec(
audio_codecs.back().id + 1, audio_codecs.back().id));
audio_codecs.push_back(cricket::CreateAudioCodec(
audio_codecs.back().id + 1, cricket::kRedCodecName, 0, 1));
audio_codecs.push_back(cricket::CreateAudioCodec(
audio_codecs.back().id + 1, cricket::kUlpfecCodecName, 0, 1));
fake_engine->SetAudioCodecs(audio_codecs);
auto caller = CreatePeerConnectionWithAudio(std::move(fake_engine));
auto transceiver = caller->pc()->GetTransceivers().front();
auto codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MediaType::MEDIA_TYPE_AUDIO)
.codecs;
auto codecs_only_rtx_red_fec = codecs;
auto it = std::remove_if(codecs_only_rtx_red_fec.begin(),
codecs_only_rtx_red_fec.end(),
[](const RtpCodecCapability& codec) {
return !(codec.name == cricket::kRtxCodecName ||
codec.name == cricket::kRedCodecName ||
codec.name == cricket::kUlpfecCodecName);
});
codecs_only_rtx_red_fec.erase(it, codecs_only_rtx_red_fec.end());
auto result = transceiver->SetCodecPreferences(codecs_only_rtx_red_fec);
EXPECT_EQ(RTCErrorType::INVALID_MODIFICATION, result.type());
}
TEST_F(PeerConnectionMediaTestUnifiedPlan, SetCodecPreferencesAllAudioCodecs) {
auto caller = CreatePeerConnectionWithAudio();
auto sender_audio_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_AUDIO)
.codecs;
auto audio_transceiver = caller->pc()->GetTransceivers().front();
// Normal case, set all capabilities as preferences
EXPECT_TRUE(audio_transceiver->SetCodecPreferences(sender_audio_codecs).ok());
auto offer = caller->CreateOffer();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(sender_audio_codecs, codecs));
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesResetAudioCodecs) {
auto caller = CreatePeerConnectionWithAudio();
auto sender_audio_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_AUDIO)
.codecs;
std::vector<RtpCodecCapability> empty_codecs = {};
auto audio_transceiver = caller->pc()->GetTransceivers().front();
// Normal case, reset codec preferences
EXPECT_TRUE(audio_transceiver->SetCodecPreferences(empty_codecs).ok());
auto offer = caller->CreateOffer();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(sender_audio_codecs, codecs));
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesVideoRejectsAudioCodec) {
auto caller = CreatePeerConnectionWithVideo();
auto transceiver = caller->pc()->GetTransceivers().front();
auto audio_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MediaType::MEDIA_TYPE_AUDIO)
.codecs;
auto codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MediaType::MEDIA_TYPE_VIDEO)
.codecs;
codecs.insert(codecs.end(), audio_codecs.begin(), audio_codecs.end());
auto result = transceiver->SetCodecPreferences(codecs);
EXPECT_EQ(RTCErrorType::INVALID_MODIFICATION, result.type());
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesVideoRejectsOnlyRtxRedFec) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
auto video_codecs = fake_engine->video().send_codecs();
video_codecs.push_back(cricket::CreateVideoRtxCodec(
video_codecs.back().id + 1, video_codecs.back().id));
video_codecs.push_back(cricket::CreateVideoCodec(video_codecs.back().id + 1,
cricket::kRedCodecName));
video_codecs.push_back(cricket::CreateVideoCodec(video_codecs.back().id + 1,
cricket::kUlpfecCodecName));
fake_engine->SetVideoCodecs(video_codecs);
auto caller = CreatePeerConnectionWithVideo(std::move(fake_engine));
auto transceiver = caller->pc()->GetTransceivers().front();
auto codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MediaType::MEDIA_TYPE_VIDEO)
.codecs;
auto codecs_only_rtx_red_fec = codecs;
auto it = std::remove_if(codecs_only_rtx_red_fec.begin(),
codecs_only_rtx_red_fec.end(),
[](const RtpCodecCapability& codec) {
return !(codec.name == cricket::kRtxCodecName ||
codec.name == cricket::kRedCodecName ||
codec.name == cricket::kUlpfecCodecName);
});
codecs_only_rtx_red_fec.erase(it, codecs_only_rtx_red_fec.end());
auto result = transceiver->SetCodecPreferences(codecs_only_rtx_red_fec);
EXPECT_EQ(RTCErrorType::INVALID_MODIFICATION, result.type());
}
TEST_F(PeerConnectionMediaTestUnifiedPlan, SetCodecPreferencesAllVideoCodecs) {
auto caller = CreatePeerConnectionWithVideo();
auto sender_video_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_VIDEO)
.codecs;
auto video_transceiver = caller->pc()->GetTransceivers().front();
// Normal case, setting preferences to normal capabilities
EXPECT_TRUE(video_transceiver->SetCodecPreferences(sender_video_codecs).ok());
auto offer = caller->CreateOffer();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(sender_video_codecs, codecs));
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesResetVideoCodecs) {
auto caller = CreatePeerConnectionWithVideo();
auto sender_video_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_VIDEO)
.codecs;
std::vector<RtpCodecCapability> empty_codecs = {};
auto video_transceiver = caller->pc()->GetTransceivers().front();
// Normal case, resetting preferences with empty list of codecs
EXPECT_TRUE(video_transceiver->SetCodecPreferences(empty_codecs).ok());
auto offer = caller->CreateOffer();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(sender_video_codecs, codecs));
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesVideoCodecDuplicatesRemoved) {
auto caller = CreatePeerConnectionWithVideo();
auto sender_video_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_VIDEO)
.codecs;
auto video_transceiver = caller->pc()->GetTransceivers().front();
// Check duplicates are removed
auto single_codec = sender_video_codecs;
single_codec.resize(1);
auto duplicate_codec = single_codec;
duplicate_codec.push_back(duplicate_codec.front());
duplicate_codec.push_back(duplicate_codec.front());
duplicate_codec.push_back(duplicate_codec.front());
EXPECT_TRUE(video_transceiver->SetCodecPreferences(duplicate_codec).ok());
auto offer = caller->CreateOffer();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(single_codec, codecs));
}
TEST_F(PeerConnectionMediaTestUnifiedPlan, SetCodecPreferencesVideoWithRtx) {
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
auto caller_video_codecs = caller_fake_engine->video().send_codecs();
caller_video_codecs.push_back(cricket::CreateVideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp8CodecName));
caller_video_codecs.push_back(cricket::CreateVideoRtxCodec(
caller_video_codecs.back().id + 1, caller_video_codecs.back().id));
caller_video_codecs.push_back(cricket::CreateVideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp9CodecName));
caller_video_codecs.push_back(cricket::CreateVideoRtxCodec(
caller_video_codecs.back().id + 1, caller_video_codecs.back().id));
caller_fake_engine->SetVideoCodecs(caller_video_codecs);
auto caller = CreatePeerConnectionWithVideo(std::move(caller_fake_engine));
auto sender_video_codecs =
caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_VIDEO)
.codecs;
auto video_transceiver = caller->pc()->GetTransceivers().front();
// Check that RTX codec is properly added
auto video_codecs_vpx_rtx = sender_video_codecs;
auto it =
std::remove_if(video_codecs_vpx_rtx.begin(), video_codecs_vpx_rtx.end(),
[](const RtpCodecCapability& codec) {
return codec.name != cricket::kRtxCodecName &&
codec.name != cricket::kVp8CodecName &&
codec.name != cricket::kVp9CodecName;
});
video_codecs_vpx_rtx.erase(it, video_codecs_vpx_rtx.end());
absl::c_reverse(video_codecs_vpx_rtx);
EXPECT_EQ(video_codecs_vpx_rtx.size(), 3u); // VP8, VP9, RTX
EXPECT_TRUE(
video_transceiver->SetCodecPreferences(video_codecs_vpx_rtx).ok());
auto offer = caller->CreateOffer();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(video_codecs_vpx_rtx, codecs));
EXPECT_EQ(codecs.size(), 4u);
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesVideoCodecsNegotiation) {
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
auto caller_video_codecs = caller_fake_engine->video().send_codecs();
caller_video_codecs.push_back(cricket::CreateVideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp8CodecName));
caller_video_codecs.push_back(cricket::CreateVideoRtxCodec(
caller_video_codecs.back().id + 1, caller_video_codecs.back().id));
caller_video_codecs.push_back(cricket::CreateVideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp9CodecName));
caller_video_codecs.push_back(cricket::CreateVideoRtxCodec(
caller_video_codecs.back().id + 1, caller_video_codecs.back().id));
caller_fake_engine->SetVideoCodecs(caller_video_codecs);
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetVideoCodecs(caller_video_codecs);
auto caller = CreatePeerConnectionWithVideo(std::move(caller_fake_engine));
auto callee = CreatePeerConnection(std::move(callee_fake_engine));
auto video_codecs = caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_VIDEO)
.codecs;
auto send_transceiver = caller->pc()->GetTransceivers().front();
auto video_codecs_vpx = video_codecs;
auto it = std::remove_if(video_codecs_vpx.begin(), video_codecs_vpx.end(),
[](const RtpCodecCapability& codec) {
return codec.name != cricket::kVp8CodecName &&
codec.name != cricket::kVp9CodecName;
});
video_codecs_vpx.erase(it, video_codecs_vpx.end());
EXPECT_EQ(video_codecs_vpx.size(), 2u); // VP8, VP9
EXPECT_TRUE(send_transceiver->SetCodecPreferences(video_codecs_vpx).ok());
auto offer = caller->CreateOfferAndSetAsLocal();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_EQ(codecs.size(), 2u); // VP8, VP9
EXPECT_TRUE(CompareCodecs(video_codecs_vpx, codecs));
callee->SetRemoteDescription(std::move(offer));
auto recv_transceiver = callee->pc()->GetTransceivers().front();
auto video_codecs_vp8_rtx = video_codecs;
it = std::remove_if(video_codecs_vp8_rtx.begin(), video_codecs_vp8_rtx.end(),
[](const RtpCodecCapability& codec) {
bool r = codec.name != cricket::kVp8CodecName &&
codec.name != cricket::kRtxCodecName;
return r;
});
video_codecs_vp8_rtx.erase(it, video_codecs_vp8_rtx.end());
EXPECT_EQ(video_codecs_vp8_rtx.size(), 2u); // VP8, RTX
recv_transceiver->SetCodecPreferences(video_codecs_vp8_rtx);
auto answer = callee->CreateAnswerAndSetAsLocal();
auto recv_codecs = answer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_EQ(recv_codecs.size(), 1u); // VP8
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesVideoCodecsNegotiationReverseOrder) {
auto caller_fake_engine = std::make_unique<FakeMediaEngine>();
auto caller_video_codecs = caller_fake_engine->video().send_codecs();
caller_video_codecs.push_back(cricket::CreateVideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp8CodecName));
caller_video_codecs.push_back(cricket::CreateVideoRtxCodec(
caller_video_codecs.back().id + 1, caller_video_codecs.back().id));
caller_video_codecs.push_back(cricket::CreateVideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp9CodecName));
caller_video_codecs.push_back(cricket::CreateVideoRtxCodec(
caller_video_codecs.back().id + 1, caller_video_codecs.back().id));
caller_fake_engine->SetVideoCodecs(caller_video_codecs);
auto callee_fake_engine = std::make_unique<FakeMediaEngine>();
callee_fake_engine->SetVideoCodecs(caller_video_codecs);
auto caller = CreatePeerConnectionWithVideo(std::move(caller_fake_engine));
auto callee = CreatePeerConnection(std::move(callee_fake_engine));
auto video_codecs = caller->pc_factory()
->GetRtpSenderCapabilities(cricket::MEDIA_TYPE_VIDEO)
.codecs;
auto send_transceiver = caller->pc()->GetTransceivers().front();
auto video_codecs_vpx = video_codecs;
auto it = std::remove_if(video_codecs_vpx.begin(), video_codecs_vpx.end(),
[](const RtpCodecCapability& codec) {
return codec.name != cricket::kVp8CodecName &&
codec.name != cricket::kVp9CodecName;
});
video_codecs_vpx.erase(it, video_codecs_vpx.end());
EXPECT_EQ(video_codecs_vpx.size(), 2u); // VP8, VP9
EXPECT_TRUE(send_transceiver->SetCodecPreferences(video_codecs_vpx).ok());
auto video_codecs_vpx_reverse = video_codecs_vpx;
absl::c_reverse(video_codecs_vpx_reverse);
auto offer = caller->CreateOfferAndSetAsLocal();
auto codecs = offer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_EQ(codecs.size(), 2u); // VP9, VP8
EXPECT_TRUE(CompareCodecs(video_codecs_vpx, codecs));
callee->SetRemoteDescription(std::move(offer));
auto recv_transceiver = callee->pc()->GetTransceivers().front();
recv_transceiver->SetCodecPreferences(video_codecs_vpx_reverse);
auto answer = callee->CreateAnswerAndSetAsLocal();
auto recv_codecs = answer->description()
->contents()[0]
.media_description()
->codecs();
EXPECT_TRUE(CompareCodecs(video_codecs_vpx_reverse, recv_codecs));
}
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesVoiceActivityDetection) {
auto fake_engine = std::make_unique<FakeMediaEngine>();
AddComfortNoiseCodecsToSend(fake_engine.get());
auto caller = CreatePeerConnectionWithAudio(std::move(fake_engine));
RTCOfferAnswerOptions options;
auto offer = caller->CreateOffer(options);
EXPECT_TRUE(HasAnyComfortNoiseCodecs(offer->description()));
auto transceiver = caller->pc()->GetTransceivers().front();
auto capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_AUDIO);
EXPECT_TRUE(transceiver->SetCodecPreferences(capabilities.codecs).ok());
options.voice_activity_detection = false;
offer = caller->CreateOffer(options);
EXPECT_FALSE(HasAnyComfortNoiseCodecs(offer->description()));
}
// If the "default" payload types of audio/video codecs are the same, and
// audio/video are bundled (as is the default), payload types should be
// remapped to avoid conflict, as normally happens without using
// SetCodecPreferences.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAvoidsPayloadTypeConflictInOffer) {
auto fake_engine = std::make_unique<cricket::FakeMediaEngine>();
std::vector<cricket::AudioCodec> audio_codecs;
audio_codecs.emplace_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
audio_codecs.emplace_back(cricket::CreateAudioRtxCodec(101, 100));
fake_engine->SetAudioCodecs(audio_codecs);
std::vector<cricket::VideoCodec> video_codecs;
video_codecs.emplace_back(cricket::CreateVideoCodec(100, "bar"));
video_codecs.emplace_back(cricket::CreateVideoRtxCodec(101, 100));
fake_engine->SetVideoCodecs(video_codecs);
auto caller = CreatePeerConnectionWithAudioVideo(std::move(fake_engine));
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
auto audio_transceiver = caller->pc()->GetTransceivers()[0];
auto capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_AUDIO);
EXPECT_TRUE(audio_transceiver->SetCodecPreferences(capabilities.codecs).ok());
auto video_transceiver = caller->pc()->GetTransceivers()[1];
capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_VIDEO);
EXPECT_TRUE(video_transceiver->SetCodecPreferences(capabilities.codecs).ok());
RTCOfferAnswerOptions options;
auto offer = caller->CreateOffer(options);
EXPECT_FALSE(HasPayloadTypeConflict(offer->description()));
// Sanity check that we got the primary codec and RTX.
EXPECT_EQ(2u, cricket::GetFirstAudioContentDescription(offer->description())
->codecs()
.size());
EXPECT_EQ(2u, cricket::GetFirstVideoContentDescription(offer->description())
->codecs()
.size());
}
// Same as above, but preferences set for the answer.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAvoidsPayloadTypeConflictInAnswer) {
auto fake_engine = std::make_unique<cricket::FakeMediaEngine>();
std::vector<cricket::AudioCodec> audio_codecs;
audio_codecs.emplace_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
audio_codecs.emplace_back(cricket::CreateAudioRtxCodec(101, 100));
fake_engine->SetAudioCodecs(audio_codecs);
std::vector<cricket::VideoCodec> video_codecs;
video_codecs.emplace_back(cricket::CreateVideoCodec(100, "bar"));
video_codecs.emplace_back(cricket::CreateVideoRtxCodec(101, 100));
fake_engine->SetVideoCodecs(video_codecs);
auto caller = CreatePeerConnectionWithAudioVideo(std::move(fake_engine));
RTCOfferAnswerOptions options;
caller->SetRemoteDescription(caller->CreateOffer(options));
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
auto audio_transceiver = caller->pc()->GetTransceivers()[0];
auto capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_AUDIO);
EXPECT_TRUE(audio_transceiver->SetCodecPreferences(capabilities.codecs).ok());
auto video_transceiver = caller->pc()->GetTransceivers()[1];
capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_VIDEO);
EXPECT_TRUE(video_transceiver->SetCodecPreferences(capabilities.codecs).ok());
auto answer = caller->CreateAnswer(options);
EXPECT_FALSE(HasPayloadTypeConflict(answer->description()));
// Sanity check that we got the primary codec and RTX.
EXPECT_EQ(2u, cricket::GetFirstAudioContentDescription(answer->description())
->codecs()
.size());
EXPECT_EQ(2u, cricket::GetFirstVideoContentDescription(answer->description())
->codecs()
.size());
}
// Same as above, but preferences set for a subsequent offer.
TEST_F(PeerConnectionMediaTestUnifiedPlan,
SetCodecPreferencesAvoidsPayloadTypeConflictInSubsequentOffer) {
auto fake_engine = std::make_unique<cricket::FakeMediaEngine>();
std::vector<cricket::AudioCodec> audio_codecs;
audio_codecs.emplace_back(cricket::CreateAudioCodec(100, "foo", 0, 1));
audio_codecs.emplace_back(cricket::CreateAudioRtxCodec(101, 100));
fake_engine->SetAudioCodecs(audio_codecs);
std::vector<cricket::VideoCodec> video_codecs;
video_codecs.emplace_back(cricket::CreateVideoCodec(100, "bar"));
video_codecs.emplace_back(cricket::CreateVideoRtxCodec(101, 100));
fake_engine->SetVideoCodecs(video_codecs);
auto caller = CreatePeerConnectionWithAudioVideo(std::move(fake_engine));
RTCOfferAnswerOptions options;
caller->SetRemoteDescription(caller->CreateOffer(options));
caller->SetLocalDescription(caller->CreateAnswer(options));
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
auto audio_transceiver = caller->pc()->GetTransceivers()[0];
auto capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_AUDIO);
EXPECT_TRUE(audio_transceiver->SetCodecPreferences(capabilities.codecs).ok());
auto video_transceiver = caller->pc()->GetTransceivers()[1];
capabilities = caller->pc_factory()->GetRtpSenderCapabilities(
cricket::MediaType::MEDIA_TYPE_VIDEO);
EXPECT_TRUE(video_transceiver->SetCodecPreferences(capabilities.codecs).ok());
auto reoffer = caller->CreateOffer(options);
ASSERT_THAT(reoffer, NotNull());
EXPECT_FALSE(HasPayloadTypeConflict(reoffer->description()));
// Sanity check that we got the primary codec and RTX.
EXPECT_EQ(2u, cricket::GetFirstAudioContentDescription(reoffer->description())
->codecs()
.size());
EXPECT_EQ(2u, cricket::GetFirstVideoContentDescription(reoffer->description())
->codecs()
.size());
}
INSTANTIATE_TEST_SUITE_P(PeerConnectionMediaTest,
PeerConnectionMediaTest,
Values(SdpSemantics::kPlanB_DEPRECATED,
SdpSemantics::kUnifiedPlan));
} // namespace webrtc