RTCPeerConnection.cpp [plain text]
#include "config.h"
#include "RTCPeerConnection.h"
#if ENABLE(WEB_RTC)
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "Frame.h"
#include "MediaEndpointConfiguration.h"
#include "MediaStream.h"
#include "MediaStreamTrack.h"
#include "RTCConfiguration.h"
#include "RTCDataChannel.h"
#include "RTCIceCandidate.h"
#include "RTCIceCandidateEvent.h"
#include "RTCOfferAnswerOptions.h"
#include "RTCSessionDescription.h"
#include "RTCTrackEvent.h"
#include "UUID.h"
#include <wtf/MainThread.h>
#include <wtf/text/Base64.h>
namespace WebCore {
using namespace PeerConnection;
using namespace PeerConnectionStates;
Ref<RTCPeerConnection> RTCPeerConnection::create(ScriptExecutionContext& context)
{
Ref<RTCPeerConnection> peerConnection = adoptRef(*new RTCPeerConnection(context));
peerConnection->suspendIfNeeded();
return peerConnection;
}
RTCPeerConnection::RTCPeerConnection(ScriptExecutionContext& context)
: ActiveDOMObject(&context)
, m_backend(PeerConnectionBackend::create(*this))
{
}
RTCPeerConnection::~RTCPeerConnection()
{
stop();
}
ExceptionOr<void> RTCPeerConnection::initializeWith(Document& document, RTCConfiguration&& configuration)
{
if (!document.frame())
return Exception { NOT_SUPPORTED_ERR };
if (!m_backend)
return Exception { NOT_SUPPORTED_ERR };
return setConfiguration(WTFMove(configuration));
}
ExceptionOr<Ref<RTCRtpSender>> RTCPeerConnection::addTrack(Ref<MediaStreamTrack>&& track, const Vector<std::reference_wrapper<MediaStream>>& streams)
{
if (m_signalingState == SignalingState::Closed)
return Exception { INVALID_STATE_ERR };
if (!streams.size())
return Exception { NOT_SUPPORTED_ERR };
for (RTCRtpSender& sender : m_transceiverSet->senders()) {
if (sender.trackId() == track->id())
return Exception { INVALID_ACCESS_ERR };
}
Vector<String> mediaStreamIds;
for (auto stream : streams)
mediaStreamIds.append(stream.get().id());
RTCRtpSender* sender = nullptr;
for (auto& transceiver : m_transceiverSet->list()) {
auto& existingSender = transceiver->sender();
if (existingSender.trackKind() == track->kind() && existingSender.trackId().isNull() && !transceiver->hasSendingDirection()) {
existingSender.setTrack(WTFMove(track));
existingSender.setMediaStreamIds(WTFMove(mediaStreamIds));
transceiver->enableSendingDirection();
sender = &existingSender;
break;
}
}
if (!sender) {
String transceiverMid = RTCRtpTransceiver::getNextMid();
const String& trackKind = track->kind();
String trackId = createCanonicalUUIDString();
auto newSender = RTCRtpSender::create(WTFMove(track), WTFMove(mediaStreamIds), *this);
auto receiver = m_backend->createReceiver(transceiverMid, trackKind, trackId);
auto transceiver = RTCRtpTransceiver::create(WTFMove(newSender), WTFMove(receiver));
transceiver->setProvisionalMid(transceiverMid);
sender = &transceiver->sender();
m_transceiverSet->append(WTFMove(transceiver));
}
m_backend->markAsNeedingNegotiation();
return Ref<RTCRtpSender> { *sender };
}
ExceptionOr<void> RTCPeerConnection::removeTrack(RTCRtpSender& sender)
{
if (m_signalingState == SignalingState::Closed)
return Exception { INVALID_STATE_ERR };
bool shouldAbort = true;
for (RTCRtpSender& senderInSet : m_transceiverSet->senders()) {
if (&senderInSet == &sender) {
shouldAbort = sender.isStopped();
break;
}
}
if (shouldAbort)
return { };
sender.stop();
m_backend->markAsNeedingNegotiation();
return { };
}
ExceptionOr<Ref<RTCRtpTransceiver>> RTCPeerConnection::addTransceiver(Ref<MediaStreamTrack>&& track, const RtpTransceiverInit& init)
{
if (m_signalingState == SignalingState::Closed)
return Exception { INVALID_STATE_ERR };
String transceiverMid = RTCRtpTransceiver::getNextMid();
const String& trackKind = track->kind();
const String& trackId = track->id();
auto sender = RTCRtpSender::create(WTFMove(track), Vector<String>(), *this);
auto receiver = m_backend->createReceiver(transceiverMid, trackKind, trackId);
auto transceiver = RTCRtpTransceiver::create(WTFMove(sender), WTFMove(receiver));
transceiver->setProvisionalMid(transceiverMid);
completeAddTransceiver(transceiver, init);
return WTFMove(transceiver);
}
ExceptionOr<Ref<RTCRtpTransceiver>> RTCPeerConnection::addTransceiver(const String& kind, const RtpTransceiverInit& init)
{
if (m_signalingState == SignalingState::Closed)
return Exception { INVALID_STATE_ERR };
if (kind != "audio" && kind != "video")
return Exception { TypeError };
String transceiverMid = RTCRtpTransceiver::getNextMid();
String trackId = createCanonicalUUIDString();
auto sender = RTCRtpSender::create(kind, Vector<String>(), *this);
auto receiver = m_backend->createReceiver(transceiverMid, kind, trackId);
auto transceiver = RTCRtpTransceiver::create(WTFMove(sender), WTFMove(receiver));
transceiver->setProvisionalMid(transceiverMid);
completeAddTransceiver(transceiver, init);
return WTFMove(transceiver);
}
void RTCPeerConnection::completeAddTransceiver(RTCRtpTransceiver& transceiver, const RtpTransceiverInit& init)
{
transceiver.setDirection(static_cast<RTCRtpTransceiver::Direction>(init.direction));
m_transceiverSet->append(transceiver);
m_backend->markAsNeedingNegotiation();
}
void RTCPeerConnection::queuedCreateOffer(RTCOfferOptions&& options, SessionDescriptionPromise&& promise)
{
if (m_signalingState == SignalingState::Closed) {
promise.reject(INVALID_STATE_ERR);
return;
}
m_backend->createOffer(WTFMove(options), WTFMove(promise));
}
void RTCPeerConnection::queuedCreateAnswer(RTCAnswerOptions&& options, SessionDescriptionPromise&& promise)
{
if (m_signalingState == SignalingState::Closed) {
promise.reject(INVALID_STATE_ERR);
return;
}
m_backend->createAnswer(WTFMove(options), WTFMove(promise));
}
void RTCPeerConnection::queuedSetLocalDescription(RTCSessionDescription& description, DOMPromise<void>&& promise)
{
if (m_signalingState == SignalingState::Closed) {
promise.reject(INVALID_STATE_ERR);
return;
}
m_backend->setLocalDescription(description, WTFMove(promise));
}
RefPtr<RTCSessionDescription> RTCPeerConnection::localDescription() const
{
return m_backend->localDescription();
}
RefPtr<RTCSessionDescription> RTCPeerConnection::currentLocalDescription() const
{
return m_backend->currentLocalDescription();
}
RefPtr<RTCSessionDescription> RTCPeerConnection::pendingLocalDescription() const
{
return m_backend->pendingLocalDescription();
}
void RTCPeerConnection::queuedSetRemoteDescription(RTCSessionDescription& description, DOMPromise<void>&& promise)
{
if (m_signalingState == SignalingState::Closed) {
promise.reject(INVALID_STATE_ERR);
return;
}
m_backend->setRemoteDescription(description, WTFMove(promise));
}
RefPtr<RTCSessionDescription> RTCPeerConnection::remoteDescription() const
{
return m_backend->remoteDescription();
}
RefPtr<RTCSessionDescription> RTCPeerConnection::currentRemoteDescription() const
{
return m_backend->currentRemoteDescription();
}
RefPtr<RTCSessionDescription> RTCPeerConnection::pendingRemoteDescription() const
{
return m_backend->pendingRemoteDescription();
}
void RTCPeerConnection::queuedAddIceCandidate(RTCIceCandidate& rtcCandidate, DOMPromise<void>&& promise)
{
if (m_signalingState == SignalingState::Closed) {
promise.reject(INVALID_STATE_ERR);
return;
}
m_backend->addIceCandidate(rtcCandidate, WTFMove(promise));
}
String RTCPeerConnection::signalingState() const
{
switch (m_signalingState) {
case SignalingState::Stable:
return ASCIILiteral("stable");
case SignalingState::HaveLocalOffer:
return ASCIILiteral("have-local-offer");
case SignalingState::HaveRemoteOffer:
return ASCIILiteral("have-remote-offer");
case SignalingState::HaveLocalPrAnswer:
return ASCIILiteral("have-local-pranswer");
case SignalingState::HaveRemotePrAnswer:
return ASCIILiteral("have-remote-pranswer");
case SignalingState::Closed:
return ASCIILiteral("closed");
}
ASSERT_NOT_REACHED();
return String();
}
String RTCPeerConnection::iceGatheringState() const
{
switch (m_iceGatheringState) {
case IceGatheringState::New:
return ASCIILiteral("new");
case IceGatheringState::Gathering:
return ASCIILiteral("gathering");
case IceGatheringState::Complete:
return ASCIILiteral("complete");
}
ASSERT_NOT_REACHED();
return String();
}
String RTCPeerConnection::iceConnectionState() const
{
switch (m_iceConnectionState) {
case IceConnectionState::New:
return ASCIILiteral("new");
case IceConnectionState::Checking:
return ASCIILiteral("checking");
case IceConnectionState::Connected:
return ASCIILiteral("connected");
case IceConnectionState::Completed:
return ASCIILiteral("completed");
case IceConnectionState::Failed:
return ASCIILiteral("failed");
case IceConnectionState::Disconnected:
return ASCIILiteral("disconnected");
case IceConnectionState::Closed:
return ASCIILiteral("closed");
}
ASSERT_NOT_REACHED();
return String();
}
ExceptionOr<void> RTCPeerConnection::setConfiguration(RTCConfiguration&& configuration)
{
if (m_signalingState == SignalingState::Closed)
return Exception { INVALID_STATE_ERR };
Vector<MediaEndpointConfiguration::IceServerInfo> servers;
if (configuration.iceServers) {
servers.reserveInitialCapacity(configuration.iceServers->size());
for (auto& server : configuration.iceServers.value()) {
Vector<URL> serverURLs;
WTF::switchOn(server.urls,
[&serverURLs] (const String& string) {
serverURLs.reserveInitialCapacity(1);
serverURLs.uncheckedAppend(URL { URL { }, string });
},
[&serverURLs] (const Vector<String>& vector) {
serverURLs.reserveInitialCapacity(vector.size());
for (auto& string : vector)
serverURLs.uncheckedAppend(URL { URL { }, string });
}
);
for (auto& serverURL : serverURLs) {
if (!(serverURL.protocolIs("turn") || serverURL.protocolIs("turns") || serverURL.protocolIs("stun")))
return Exception { INVALID_ACCESS_ERR };
}
servers.uncheckedAppend({ WTFMove(serverURLs), server.credential, server.username });
}
}
m_backend->setConfiguration({ WTFMove(servers), configuration.iceTransportPolicy, configuration.bundlePolicy });
m_configuration = WTFMove(configuration);
return { };
}
void RTCPeerConnection::privateGetStats(MediaStreamTrack* selector, PeerConnection::StatsPromise&& promise)
{
m_backend->getStats(selector, WTFMove(promise));
}
ExceptionOr<Ref<RTCDataChannel>> RTCPeerConnection::createDataChannel(ScriptExecutionContext& context, String&& label, RTCDataChannelInit&& options)
{
if (m_signalingState == SignalingState::Closed)
return Exception { INVALID_STATE_ERR };
auto channelHandler = m_backend->createDataChannelHandler(label, options);
if (!channelHandler)
return Exception { NOT_SUPPORTED_ERR };
return RTCDataChannel::create(context, WTFMove(channelHandler), WTFMove(label), WTFMove(options));
}
void RTCPeerConnection::close()
{
if (m_signalingState == SignalingState::Closed)
return;
m_backend->stop();
m_iceConnectionState = IceConnectionState::Closed;
m_signalingState = SignalingState::Closed;
for (RTCRtpSender& sender : m_transceiverSet->senders())
sender.stop();
}
void RTCPeerConnection::emulatePlatformEvent(const String& action)
{
m_backend->emulatePlatformEvent(action);
}
void RTCPeerConnection::stop()
{
close();
}
const char* RTCPeerConnection::activeDOMObjectName() const
{
return "RTCPeerConnection";
}
bool RTCPeerConnection::canSuspendForDocumentSuspension() const
{
return false;
}
void RTCPeerConnection::addTransceiver(Ref<RTCRtpTransceiver>&& transceiver)
{
m_transceiverSet->append(WTFMove(transceiver));
}
void RTCPeerConnection::setSignalingState(SignalingState newState)
{
m_signalingState = newState;
}
void RTCPeerConnection::updateIceGatheringState(IceGatheringState newState)
{
scriptExecutionContext()->postTask([=](ScriptExecutionContext&) {
if (m_signalingState == SignalingState::Closed || m_iceGatheringState == newState)
return;
m_iceGatheringState = newState;
dispatchEvent(Event::create(eventNames().icegatheringstatechangeEvent, false, false));
});
}
void RTCPeerConnection::updateIceConnectionState(IceConnectionState newState)
{
scriptExecutionContext()->postTask([=](ScriptExecutionContext&) {
if (m_signalingState == SignalingState::Closed || m_iceConnectionState == newState)
return;
m_iceConnectionState = newState;
dispatchEvent(Event::create(eventNames().iceconnectionstatechangeEvent, false, false));
});
}
void RTCPeerConnection::scheduleNegotiationNeededEvent()
{
scriptExecutionContext()->postTask([=](ScriptExecutionContext&) {
if (m_backend->isNegotiationNeeded()) {
m_backend->clearNegotiationNeededState();
dispatchEvent(Event::create(eventNames().negotiationneededEvent, false, false));
}
});
}
void RTCPeerConnection::fireEvent(Event& event)
{
dispatchEvent(event);
}
void RTCPeerConnection::replaceTrack(RTCRtpSender& sender, RefPtr<MediaStreamTrack>&& withTrack, DOMPromise<void>&& promise)
{
m_backend->replaceTrack(sender, WTFMove(withTrack), WTFMove(promise));
}
}
#endif // ENABLE(WEB_RTC)