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webrtc_m130/pc/peer_connection_media_unittest.cc
Harald Alvestrand 8981a6fac3 Use two MediaChannels for 2 directions. 
This CL separates the two directions of MediaChannel into two separate objects that do not couple with each other.

The notable API change is that receiver local SSRC now has to be set explicitly - before, it was done implicitly when the send-side MediaChannel had a stream added to it.

Bug: webrtc:13931
Change-Id: I83c2e3c8e79f89872d5adda1bc2899f7049748b3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/288400
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39340}
2023-02-19 10:34:42 +00:00

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/*
* 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/call/call_factory_interface.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_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/media_session.h"
#include "pc/peer_connection_wrapper.h"
#include "pc/rtp_media_utils.h"
#include "pc/session_description.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/gunit.h"
#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::NotNull;
using ::testing::Values;
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();
factory_dependencies.media_engine = std::move(media_engine);
factory_dependencies.call_factory = CreateCallFactory();
factory_dependencies.event_log_factory =
std::make_unique<RtcEventLogFactory>(
factory_dependencies.task_queue_factory.get());
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;
}
webrtc::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_PRED_FORMAT2(AssertStartsWith, error,
"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_PRED_FORMAT2(AssertStartsWith, error,
"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_P(PeerConnectionMediaTest, 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 = caller->media_engine()->GetVoiceChannel(0);
auto* caller_voice_receive = caller->media_engine()->GetVoiceChannel(1);
EXPECT_THAT(GetIds(caller_voice_receive->recv_streams()),
ElementsAre(kCalleeAudioId));
EXPECT_THAT(GetIds(caller_voice_send->send_streams()),
ElementsAre(kCallerAudioId));
auto* caller_video_send = caller->media_engine()->GetVideoChannel(0);
auto* caller_video_receive = caller->media_engine()->GetVideoChannel(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 = callee->media_engine()->GetVoiceChannel(0);
auto* callee_voice_receive = callee->media_engine()->GetVoiceChannel(1);
EXPECT_THAT(GetIds(callee_voice_receive->recv_streams()),
ElementsAre(kCallerAudioId));
EXPECT_THAT(GetIds(callee_voice_send->send_streams()),
ElementsAre(kCalleeAudioId));
auto* callee_video_send = callee->media_engine()->GetVideoChannel(0);
auto* callee_video_receive = callee->media_engine()->GetVideoChannel(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_FALSE(callee->media_engine()->GetVoiceChannel(0));
ASSERT_FALSE(callee->media_engine()->GetVideoChannel(0));
}
// 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()));
auto callee_voice = callee->media_engine()->GetVoiceChannel(0);
auto callee_video = callee->media_engine()->GetVideoChannel(0);
EXPECT_EQ(1u, callee_voice->send_streams().size());
EXPECT_EQ(0u, callee_voice->recv_streams().size());
EXPECT_EQ(1u, callee_video->send_streams().size());
EXPECT_EQ(0u, callee_video->recv_streams().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_FALSE(callee->media_engine()->GetVoiceChannel(0));
EXPECT_FALSE(callee->media_engine()->GetVideoChannel(0));
}
// 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()));
auto callee_voice_send = callee->media_engine()->GetVoiceChannel(0);
auto callee_voice_receive = callee->media_engine()->GetVoiceChannel(1);
auto callee_video_send = callee->media_engine()->GetVideoChannel(0);
auto callee_video_receive = callee->media_engine()->GetVideoChannel(1);
EXPECT_EQ(0u, callee_voice_send->send_streams().size());
EXPECT_EQ(1u, callee_voice_receive->recv_streams().size());
EXPECT_EQ(0u, callee_video_send->send_streams().size());
EXPECT_EQ(1u, callee_video_receive->recv_streams().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()));
auto a1 = callee->media_engine()->GetVoiceChannel(1);
auto a2 = callee->media_engine()->GetVoiceChannel(3);
auto v1 = callee->media_engine()->GetVideoChannel(1);
auto v2 = callee->media_engine()->GetVideoChannel(3);
if (IsUnifiedPlan()) {
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 {
ASSERT_TRUE(a1);
EXPECT_EQ(2u, a1->recv_streams().size());
ASSERT_FALSE(a2);
ASSERT_TRUE(v1);
EXPECT_EQ(2u, v1->recv_streams().size());
ASSERT_FALSE(v2);
}
}
// 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));
auto callee_voice = callee->media_engine()->GetVoiceChannel(0);
ASSERT_TRUE(callee_voice);
auto callee_video = callee->media_engine()->GetVideoChannel(0);
ASSERT_TRUE(callee_video);
if (IsUnifiedPlan()) {
EXPECT_EQ(1u, callee_voice->send_streams().size());
EXPECT_EQ(1u, callee_video->send_streams().size());
} else {
EXPECT_EQ(2u, callee_voice->send_streams().size());
EXPECT_EQ(2u, callee_video->send_streams().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::VideoCodec(111, cricket::kVp8CodecName));
fake_codecs.push_back(cricket::VideoCodec(112, cricket::kRtxCodecName));
fake_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "111";
fake_codecs.push_back(cricket::VideoCodec(113, cricket::kVp9CodecName));
fake_codecs.push_back(cricket::VideoCodec(114, cricket::kH264CodecName));
fake_codecs.push_back(cricket::VideoCodec(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::VideoCodec(111, cricket::kVp8CodecName));
fake_codecs.push_back(cricket::VideoCodec(112, cricket::kRtxCodecName));
fake_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "111";
fake_codecs.push_back(cricket::VideoCodec(113, cricket::kVp9CodecName));
fake_codecs.push_back(cricket::VideoCodec(114, cricket::kH264CodecName));
fake_codecs.push_back(cricket::VideoCodec(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.GetCodecType() == cricket::VideoCodec::CODEC_VIDEO) {
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.GetCodecType() == cricket::VideoCodec::CODEC_VIDEO) {
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::VideoCodec(111, cricket::kVp8CodecName));
fake_codecs.push_back(cricket::VideoCodec(112, cricket::kRtxCodecName));
fake_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "111";
fake_codecs.push_back(cricket::VideoCodec(113, cricket::kVp9CodecName));
fake_codecs.push_back(cricket::VideoCodec(114, cricket::kH264CodecName));
fake_codecs.push_back(cricket::VideoCodec(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(102, cricket::kCnCodecName,
8000, 0, 1);
const cricket::AudioCodec kComfortNoiseCodec16k(103, cricket::kCnCodecName,
16000, 0, 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 RemoveVideoContent(cricket::SessionDescription* desc) {
auto content_name = cricket::GetFirstVideoContent(desc)->name;
desc->RemoveContentByName(content_name);
desc->RemoveTransportInfoByName(content_name);
}
void RenameVideoContent(cricket::SessionDescription* desc) {
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",
RemoveVideoContent,
kMLinesOutOfOrder),
std::make_tuple("rename video",
RenameVideoContent,
kMLinesOutOfOrder),
std::make_tuple("reverse media sections",
ReverseMediaContent,
kMLinesOutOfOrder),
std::make_tuple("change audio type to video type",
ChangeMediaTypeAudioToVideo,
kMLinesOutOfOrder))));
// Test that the correct media engine send/recv streams are created when doing
// a series of offer/answers where audio/video are both sent, then audio is
// rejected, then both audio/video sent again.
TEST_P(PeerConnectionMediaTest, TestAVOfferWithAudioOnlyAnswer) {
if (IsUnifiedPlan()) {
// offer_to_receive_ is not implemented when creating answers with Unified
// Plan semantics specified.
return;
}
RTCOfferAnswerOptions options_reject_video;
options_reject_video.offer_to_receive_audio =
RTCOfferAnswerOptions::kOfferToReceiveMediaTrue;
options_reject_video.offer_to_receive_video = 0;
auto caller = CreatePeerConnection();
caller->AddAudioTrack("a");
caller->AddVideoTrack("v");
auto callee = CreatePeerConnection();
// Caller initially offers to send/recv audio and video.
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
// Callee accepts the audio as recv only but rejects the video.
ASSERT_TRUE(caller->SetRemoteDescription(
callee->CreateAnswerAndSetAsLocal(options_reject_video)));
auto caller_voice_send = caller->media_engine()->GetVoiceChannel(0);
auto caller_voice_receive = caller->media_engine()->GetVoiceChannel(1);
ASSERT_TRUE(caller_voice_send && caller_voice_receive);
EXPECT_EQ(0u, caller_voice_receive->recv_streams().size());
EXPECT_EQ(1u, caller_voice_send->send_streams().size());
auto caller_video = caller->media_engine()->GetVideoChannel(0);
EXPECT_FALSE(caller_video);
// Callee adds its own audio/video stream and offers to receive audio/video
// too.
callee->AddAudioTrack("a");
auto callee_video_track = callee->AddVideoTrack("v");
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
ASSERT_TRUE(
caller->SetRemoteDescription(callee->CreateAnswerAndSetAsLocal()));
auto callee_voice_send = callee->media_engine()->GetVoiceChannel(0);
auto callee_voice_receive = callee->media_engine()->GetVoiceChannel(1);
ASSERT_TRUE(callee_voice_send && callee_voice_receive);
EXPECT_EQ(1u, callee_voice_receive->recv_streams().size());
EXPECT_EQ(1u, callee_voice_send->send_streams().size());
auto callee_video_send = callee->media_engine()->GetVideoChannel(0);
auto callee_video_receive = callee->media_engine()->GetVideoChannel(1);
ASSERT_TRUE(callee_video_send && callee_video_receive);
EXPECT_EQ(1u, callee_video_receive->recv_streams().size());
EXPECT_EQ(1u, callee_video_send->send_streams().size());
// Callee removes video but keeps audio and rejects the video once again.
callee->pc()->RemoveTrackOrError(callee_video_track);
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
ASSERT_TRUE(
callee->SetLocalDescription(callee->CreateAnswer(options_reject_video)));
callee_voice_send = callee->media_engine()->GetVoiceChannel(0);
callee_voice_receive = callee->media_engine()->GetVoiceChannel(1);
ASSERT_TRUE(callee_voice_send && callee_voice_receive);
EXPECT_EQ(1u, callee_voice_receive->recv_streams().size());
EXPECT_EQ(1u, callee_voice_send->send_streams().size());
auto callee_video = callee->media_engine()->GetVideoChannel(0);
EXPECT_FALSE(callee_video);
}
// Test that the correct media engine send/recv streams are created when doing
// a series of offer/answers where audio/video are both sent, then video is
// rejected, then both audio/video sent again.
TEST_P(PeerConnectionMediaTest, TestAVOfferWithVideoOnlyAnswer) {
if (IsUnifiedPlan()) {
// offer_to_receive_ is not implemented when creating answers with Unified
// Plan semantics specified.
return;
}
// Disable the bundling here. If the media is bundled on audio
// transport, then we can't reject the audio because switching the bundled
// transport is not currently supported.
// (https://bugs.chromium.org/p/webrtc/issues/detail?id=6704)
RTCOfferAnswerOptions options_no_bundle;
options_no_bundle.use_rtp_mux = false;
RTCOfferAnswerOptions options_reject_audio = options_no_bundle;
options_reject_audio.offer_to_receive_audio = 0;
options_reject_audio.offer_to_receive_video =
RTCOfferAnswerOptions::kMaxOfferToReceiveMedia;
auto caller = CreatePeerConnection();
caller->AddAudioTrack("a");
caller->AddVideoTrack("v");
auto callee = CreatePeerConnection();
// Caller initially offers to send/recv audio and video.
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
// Callee accepts the video as recv only but rejects the audio.
ASSERT_TRUE(caller->SetRemoteDescription(
callee->CreateAnswerAndSetAsLocal(options_reject_audio)));
auto caller_voice = caller->media_engine()->GetVoiceChannel(0);
EXPECT_FALSE(caller_voice);
auto caller_video = caller->media_engine()->GetVideoChannel(0);
ASSERT_TRUE(caller_video);
EXPECT_EQ(0u, caller_video->recv_streams().size());
EXPECT_EQ(1u, caller_video->send_streams().size());
// Callee adds its own audio/video stream and offers to receive audio/video
// too.
auto callee_audio_track = callee->AddAudioTrack("a");
callee->AddVideoTrack("v");
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
ASSERT_TRUE(caller->SetRemoteDescription(
callee->CreateAnswerAndSetAsLocal(options_no_bundle)));
auto callee_voice_send = callee->media_engine()->GetVoiceChannel(0);
auto callee_voice_receive = callee->media_engine()->GetVoiceChannel(1);
ASSERT_TRUE(callee_voice_send && callee_voice_receive);
EXPECT_EQ(1u, callee_voice_receive->recv_streams().size());
EXPECT_EQ(1u, callee_voice_send->send_streams().size());
auto callee_video_send = callee->media_engine()->GetVideoChannel(0);
auto callee_video_receive = callee->media_engine()->GetVideoChannel(1);
ASSERT_TRUE(callee_video_send && callee_video_receive);
EXPECT_EQ(1u, callee_video_receive->recv_streams().size());
EXPECT_EQ(1u, callee_video_send->send_streams().size());
// Callee removes audio but keeps video and rejects the audio once again.
callee->pc()->RemoveTrackOrError(callee_audio_track);
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
ASSERT_TRUE(
callee->SetLocalDescription(callee->CreateAnswer(options_reject_audio)));
auto callee_voice = callee->media_engine()->GetVoiceChannel(0);
EXPECT_FALSE(callee_voice);
callee_video_send = callee->media_engine()->GetVideoChannel(0);
callee_video_receive = callee->media_engine()->GetVideoChannel(1);
ASSERT_TRUE(callee_video_send && callee_video_receive);
EXPECT_EQ(1u, callee_video_receive->recv_streams().size());
EXPECT_EQ(1u, callee_video_send->send_streams().size());
}
// 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_P(PeerConnectionMediaTest, MediaEngineErrorPropagatedToClients) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto video_channel = caller->media_engine()->GetVideoChannel(0);
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_P(PeerConnectionMediaTest,
FailToApplyDescriptionIfVideoEncoderHasEverFailed) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto video_channel = caller->media_engine()->GetVideoChannel(0);
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_P(PeerConnectionMediaTest,
CombinedAudioVideoBweConfigPropagatedToMediaEngine) {
RTCConfiguration config;
config.combined_audio_video_bwe.emplace(true);
auto caller = CreatePeerConnectionWithAudioVideo(config);
ASSERT_TRUE(caller->SetLocalDescription(caller->CreateOffer()));
auto caller_voice = caller->media_engine()->GetVoiceChannel(0);
ASSERT_TRUE(caller_voice);
const cricket::AudioOptions& audio_options = caller_voice->options();
EXPECT_EQ(config.combined_audio_video_bwe,
audio_options.combined_audio_video_bwe);
}
// 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::AudioCodec(100, "foo", 0, 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::AudioCodec(120, "foo", 0, 0, 1));
callee_fake_codecs.push_back(
cricket::AudioCodec(121, cricket::kRedCodecName, 0, 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::AudioCodec(100, "foo", 0, 0, 1));
caller_fake_codecs.push_back(
cricket::AudioCodec(101, cricket::kRedCodecName, 0, 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::AudioCodec(120, "foo", 0, 0, 1));
callee_fake_codecs.push_back(
cricket::AudioCodec(121, cricket::kRedCodecName, 0, 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::AudioCodec(100, "foo", 0, 0, 1));
caller_fake_codecs.push_back(
cricket::AudioCodec(101, cricket::kRedCodecName, 0, 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::AudioCodec(120, "foo", 0, 0, 1));
callee_fake_codecs.push_back(
cricket::AudioCodec(121, cricket::kRedCodecName, 0, 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::AudioCodec(100, "foo", 0, 0, 1));
caller_fake_codecs.push_back(
cricket::AudioCodec(101, cricket::kRedCodecName, 0, 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::AudioCodec(120, "foo", 0, 0, 1));
callee_fake_codecs.push_back(
cricket::AudioCodec(121, cricket::kRedCodecName, 0, 0, 1));
callee_fake_codecs.push_back(cricket::AudioCodec(122, "bar", 0, 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::AudioCodec(100, "foo", 0, 0, 1));
caller_fake_codecs.push_back(cricket::AudioCodec(102, "bar", 0, 0, 1));
caller_fake_codecs.push_back(
cricket::AudioCodec(101, cricket::kRedCodecName, 0, 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::AudioCodec(120, "foo", 0, 0, 1));
callee_fake_codecs.push_back(
cricket::AudioCodec(121, cricket::kRedCodecName, 0, 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::AudioCodec(100, "foo", 0, 0, 1));
caller_fake_codecs.push_back(
cricket::AudioCodec(101, cricket::kRedCodecName, 0, 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::AudioCodec(120, "foo", 0, 0, 1));
callee_fake_codecs.push_back(
cricket::AudioCodec(121, cricket::kRedCodecName, 0, 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<webrtc::RtpCodecCapability>& capabilities,
const std::vector<C>& codecs) {
bool capability_has_rtx =
absl::c_any_of(capabilities, [](const webrtc::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<webrtc::RtpCodecCapability> capabilities_no_rtx;
absl::c_copy_if(capabilities, std::back_inserter(capabilities_no_rtx),
[](const webrtc::RtpCodecCapability& codec) {
return codec.name != cricket::kRtxCodecName;
});
return capability_has_rtx == codecs_has_rtx &&
absl::c_equal(
capabilities_no_rtx, codecs_no_rtx,
[](const webrtc::RtpCodecCapability& capability, const C& codec) {
return codec.MatchesCapability(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::AudioCodec(send_codecs.back().id + 1,
"send_only_codec", 0, 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<webrtc::RtpCodecCapability> codecs;
absl::c_copy_if(capabilities.codecs, std::back_inserter(codecs),
[](const webrtc::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::AudioCodec(recv_codecs.back().id + 1,
"recv_only_codec", 0, 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<webrtc::RtpCodecCapability> codecs;
absl::c_copy_if(capabilities.codecs, std::back_inserter(codecs),
[](const webrtc::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::AudioCodec(audio_codecs.back().id + 1,
cricket::kRtxCodecName, 0, 0, 1));
audio_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(audio_codecs.back().id - 1);
audio_codecs.push_back(cricket::AudioCodec(audio_codecs.back().id + 1,
cricket::kRedCodecName, 0, 0, 1));
audio_codecs.push_back(cricket::AudioCodec(
audio_codecs.back().id + 1, cricket::kUlpfecCodecName, 0, 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 webrtc::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()
->as_audio()
->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<webrtc::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()
->as_audio()
->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::VideoCodec(video_codecs.back().id + 1, cricket::kRtxCodecName));
video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(video_codecs.back().id - 1);
video_codecs.push_back(
cricket::VideoCodec(video_codecs.back().id + 1, cricket::kRedCodecName));
video_codecs.push_back(cricket::VideoCodec(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 webrtc::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()
->as_video()
->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<webrtc::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()
->as_video()
->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()
->as_video()
->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::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp8CodecName));
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kRtxCodecName));
caller_video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(caller_video_codecs.back().id - 1);
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp9CodecName));
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kRtxCodecName));
caller_video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(caller_video_codecs.back().id - 1);
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 webrtc::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()
->as_video()
->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::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp8CodecName));
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kRtxCodecName));
caller_video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(caller_video_codecs.back().id - 1);
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp9CodecName));
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kRtxCodecName));
caller_video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(caller_video_codecs.back().id - 1);
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 webrtc::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()
->as_video()
->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 webrtc::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()
->as_video()
->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::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp8CodecName));
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kRtxCodecName));
caller_video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(caller_video_codecs.back().id - 1);
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kVp9CodecName));
caller_video_codecs.push_back(cricket::VideoCodec(
caller_video_codecs.back().id + 1, cricket::kRtxCodecName));
caller_video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] =
std::to_string(caller_video_codecs.back().id - 1);
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 webrtc::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()
->as_video()
->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()
->as_video()
->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(100, "foo", 0, 0, 1);
audio_codecs.emplace_back(101, cricket::kRtxCodecName, 0, 0, 1);
audio_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "100";
fake_engine->SetAudioCodecs(audio_codecs);
std::vector<cricket::VideoCodec> video_codecs;
video_codecs.emplace_back(100, "bar");
video_codecs.emplace_back(101, cricket::kRtxCodecName);
video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "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(100, "foo", 0, 0, 1);
audio_codecs.emplace_back(101, cricket::kRtxCodecName, 0, 0, 1);
audio_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "100";
fake_engine->SetAudioCodecs(audio_codecs);
std::vector<cricket::VideoCodec> video_codecs;
video_codecs.emplace_back(100, "bar");
video_codecs.emplace_back(101, cricket::kRtxCodecName);
video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "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(100, "foo", 0, 0, 1);
audio_codecs.emplace_back(101, cricket::kRtxCodecName, 0, 0, 1);
audio_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "100";
fake_engine->SetAudioCodecs(audio_codecs);
std::vector<cricket::VideoCodec> video_codecs;
video_codecs.emplace_back(100, "bar");
video_codecs.emplace_back(101, cricket::kRtxCodecName);
video_codecs.back().params[cricket::kCodecParamAssociatedPayloadType] = "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
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