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/*
* Copyright 2018 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "examples/objcnativeapi/objc/objc_call_client.h"
#include <memory>
#include <utility>
#import "sdk/objc/base/RTCVideoRenderer.h"
#import "sdk/objc/components/video_codec/RTCDefaultVideoDecoderFactory.h"
#import "sdk/objc/components/video_codec/RTCDefaultVideoEncoderFactory.h"
#import "sdk/objc/helpers/RTCCameraPreviewView.h"
#include "api/audio_codecs/builtin_audio_decoder_factory.h"
#include "api/audio_codecs/builtin_audio_encoder_factory.h"
#include "api/peer_connection_interface.h"
#include "api/rtc_event_log/rtc_event_log_factory.h"
#include "api/task_queue/default_task_queue_factory.h"
#include "media/engine/webrtc_media_engine.h"
#include "modules/audio_processing/include/audio_processing.h"
#include "sdk/objc/native/api/video_capturer.h"
#include "sdk/objc/native/api/video_decoder_factory.h"
#include "sdk/objc/native/api/video_encoder_factory.h"
#include "sdk/objc/native/api/video_renderer.h"
namespace webrtc_examples {
namespace {
class CreateOfferObserver : public webrtc::CreateSessionDescriptionObserver {
public:
explicit CreateOfferObserver(rtc::scoped_refptr<webrtc::PeerConnectionInterface> pc);
void OnSuccess(webrtc::SessionDescriptionInterface* desc) override;
void OnFailure(webrtc::RTCError error) override;
private:
const rtc::scoped_refptr<webrtc::PeerConnectionInterface> pc_;
};
class SetRemoteSessionDescriptionObserver : public webrtc::SetRemoteDescriptionObserverInterface {
public:
void OnSetRemoteDescriptionComplete(webrtc::RTCError error) override;
};
class SetLocalSessionDescriptionObserver : public webrtc::SetSessionDescriptionObserver {
public:
void OnSuccess() override;
void OnFailure(webrtc::RTCError error) override;
};
} // namespace
ObjCCallClient::ObjCCallClient()
: call_started_(false), pc_observer_(std::make_unique<PCObserver>(this)) {
thread_checker_.Detach();
CreatePeerConnectionFactory();
}
void ObjCCallClient::Call(RTC_OBJC_TYPE(RTCVideoCapturer) * capturer,
id<RTC_OBJC_TYPE(RTCVideoRenderer)> remote_renderer) {
RTC_DCHECK_RUN_ON(&thread_checker_);
webrtc::MutexLock lock(&pc_mutex_);
if (call_started_) {
RTC_LOG(LS_WARNING) << "Call already started.";
return;
}
call_started_ = true;
remote_sink_ = webrtc::ObjCToNativeVideoRenderer(remote_renderer);
video_source_ =
webrtc::ObjCToNativeVideoCapturer(capturer, signaling_thread_.get(), worker_thread_.get());
CreatePeerConnection();
Connect();
}
void ObjCCallClient::Hangup() {
RTC_DCHECK_RUN_ON(&thread_checker_);
call_started_ = false;
{
webrtc::MutexLock lock(&pc_mutex_);
if (pc_ != nullptr) {
pc_->Close();
pc_ = nullptr;
}
}
remote_sink_ = nullptr;
video_source_ = nullptr;
}
void ObjCCallClient::CreatePeerConnectionFactory() {
network_thread_ = rtc::Thread::CreateWithSocketServer();
network_thread_->SetName("network_thread", nullptr);
RTC_CHECK(network_thread_->Start()) << "Failed to start thread";
worker_thread_ = rtc::Thread::Create();
worker_thread_->SetName("worker_thread", nullptr);
RTC_CHECK(worker_thread_->Start()) << "Failed to start thread";
signaling_thread_ = rtc::Thread::Create();
signaling_thread_->SetName("signaling_thread", nullptr);
RTC_CHECK(signaling_thread_->Start()) << "Failed to start thread";
webrtc::PeerConnectionFactoryDependencies dependencies;
dependencies.network_thread = network_thread_.get();
dependencies.worker_thread = worker_thread_.get();
dependencies.signaling_thread = signaling_thread_.get();
dependencies.task_queue_factory = webrtc::CreateDefaultTaskQueueFactory();
cricket::MediaEngineDependencies media_deps;
media_deps.task_queue_factory = dependencies.task_queue_factory.get();
media_deps.audio_encoder_factory = webrtc::CreateBuiltinAudioEncoderFactory();
media_deps.audio_decoder_factory = webrtc::CreateBuiltinAudioDecoderFactory();
media_deps.video_encoder_factory = webrtc::ObjCToNativeVideoEncoderFactory(
[[RTC_OBJC_TYPE(RTCDefaultVideoEncoderFactory) alloc] init]);
media_deps.video_decoder_factory = webrtc::ObjCToNativeVideoDecoderFactory(
[[RTC_OBJC_TYPE(RTCDefaultVideoDecoderFactory) alloc] init]);
media_deps.audio_processing = webrtc::AudioProcessingBuilder().Create();
dependencies.media_engine = cricket::CreateMediaEngine(std::move(media_deps));
RTC_LOG(LS_INFO) << "Media engine created: " << dependencies.media_engine.get();
dependencies.call_factory = webrtc::CreateCallFactory();
dependencies.event_log_factory =
std::make_unique<webrtc::RtcEventLogFactory>(dependencies.task_queue_factory.get());
pcf_ = webrtc::CreateModularPeerConnectionFactory(std::move(dependencies));
RTC_LOG(LS_INFO) << "PeerConnectionFactory created: " << pcf_;
}
void ObjCCallClient::CreatePeerConnection() {
webrtc::MutexLock lock(&pc_mutex_);
webrtc::PeerConnectionInterface::RTCConfiguration config;
config.sdp_semantics = webrtc::SdpSemantics::kUnifiedPlan;
// DTLS SRTP has to be disabled for loopback to work.
config.enable_dtls_srtp = false;
webrtc::PeerConnectionDependencies pc_dependencies(pc_observer_.get());
pc_ = pcf_->CreatePeerConnectionOrError(config, std::move(pc_dependencies)).MoveValue();
RTC_LOG(LS_INFO) << "PeerConnection created: " << pc_;
rtc::scoped_refptr<webrtc::VideoTrackInterface> local_video_track =
pcf_->CreateVideoTrack("video", video_source_);
pc_->AddTransceiver(local_video_track);
RTC_LOG(LS_INFO) << "Local video sink set up: " << local_video_track;
for (const rtc::scoped_refptr<webrtc::RtpTransceiverInterface>& tranceiver :
pc_->GetTransceivers()) {
rtc::scoped_refptr<webrtc::MediaStreamTrackInterface> track = tranceiver->receiver()->track();
if (track && track->kind() == webrtc::MediaStreamTrackInterface::kVideoKind) {
static_cast<webrtc::VideoTrackInterface*>(track.get())
->AddOrUpdateSink(remote_sink_.get(), rtc::VideoSinkWants());
RTC_LOG(LS_INFO) << "Remote video sink set up: " << track;
break;
}
}
}
void ObjCCallClient::Connect() {
webrtc::MutexLock lock(&pc_mutex_);
pc_->CreateOffer(new rtc::RefCountedObject<CreateOfferObserver>(pc_),
webrtc::PeerConnectionInterface::RTCOfferAnswerOptions());
}
ObjCCallClient::PCObserver::PCObserver(ObjCCallClient* client) : client_(client) {}
void ObjCCallClient::PCObserver::OnSignalingChange(
webrtc::PeerConnectionInterface::SignalingState new_state) {
RTC_LOG(LS_INFO) << "OnSignalingChange: " << new_state;
}
void ObjCCallClient::PCObserver::OnDataChannel(
rtc::scoped_refptr<webrtc::DataChannelInterface> data_channel) {
RTC_LOG(LS_INFO) << "OnDataChannel";
}
void ObjCCallClient::PCObserver::OnRenegotiationNeeded() {
RTC_LOG(LS_INFO) << "OnRenegotiationNeeded";
}
void ObjCCallClient::PCObserver::OnIceConnectionChange(
webrtc::PeerConnectionInterface::IceConnectionState new_state) {
RTC_LOG(LS_INFO) << "OnIceConnectionChange: " << new_state;
}
void ObjCCallClient::PCObserver::OnIceGatheringChange(
webrtc::PeerConnectionInterface::IceGatheringState new_state) {
RTC_LOG(LS_INFO) << "OnIceGatheringChange: " << new_state;
}
void ObjCCallClient::PCObserver::OnIceCandidate(const webrtc::IceCandidateInterface* candidate) {
RTC_LOG(LS_INFO) << "OnIceCandidate: " << candidate->server_url();
webrtc::MutexLock lock(&client_->pc_mutex_);
RTC_DCHECK(client_->pc_ != nullptr);
client_->pc_->AddIceCandidate(candidate);
}
CreateOfferObserver::CreateOfferObserver(rtc::scoped_refptr<webrtc::PeerConnectionInterface> pc)
: pc_(pc) {}
void CreateOfferObserver::OnSuccess(webrtc::SessionDescriptionInterface* desc) {
std::string sdp;
desc->ToString(&sdp);
RTC_LOG(LS_INFO) << "Created offer: " << sdp;
// Ownership of desc was transferred to us, now we transfer it forward.
pc_->SetLocalDescription(new rtc::RefCountedObject<SetLocalSessionDescriptionObserver>(), desc);
// Generate a fake answer.
std::unique_ptr<webrtc::SessionDescriptionInterface> answer(
webrtc::CreateSessionDescription(webrtc::SdpType::kAnswer, sdp));
pc_->SetRemoteDescription(std::move(answer),
new rtc::RefCountedObject<SetRemoteSessionDescriptionObserver>());
}
void CreateOfferObserver::OnFailure(webrtc::RTCError error) {
RTC_LOG(LS_INFO) << "Failed to create offer: " << error.message();
}
void SetRemoteSessionDescriptionObserver::OnSetRemoteDescriptionComplete(webrtc::RTCError error) {
RTC_LOG(LS_INFO) << "Set remote description: " << error.message();
}
void SetLocalSessionDescriptionObserver::OnSuccess() {
RTC_LOG(LS_INFO) << "Set local description success!";
}
void SetLocalSessionDescriptionObserver::OnFailure(webrtc::RTCError error) {
RTC_LOG(LS_INFO) << "Set local description failure: " << error.message();
}
} // namespace webrtc_examples
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