WebRTC native, ICE callbaks not triggered.

[chen chen]

Hi,

    I'm developing a WebRTC native demo client, using the master brach of WebRTC (I pulled webrtc yesterday), but I am suffering that the ICE callbacks are not triggered.

    By referening to the example in the WebRTC strunk, my code is roughly like this (I hope it is not too long), I got the offer sdp but no ICE candidate:

class MockClient: public webrtc::PeerConnectionObserver,

public webrtc::CreateSessionDescriptionObserver,

public rtc::Runnable {

MockClient(): mServer(), mSignalingThread(&mServer)

{

mSignalingThread.SetName("SignalingThread", nullptr);

mSignalingThread.Start(this);

}

void Run(rtc::Thread* thread) override

{

mPcf = webrtc::CreatePeerConnectionFactory(

nullptr /* network_thread */, nullptr /* worker_thread */,

nullptr /* signaling_thread */, nullptr /* default_adm */,

webrtc::CreateBuiltinAudioEncoderFactory(),

webrtc::CreateBuiltinAudioDecoderFactory(),

webrtc::CreateBuiltinVideoEncoderFactory(),

webrtc::CreateBuiltinVideoDecoderFactory(), nullptr /* audio_mixer */,

nullptr /* audio_processing */);

assert(mPcf != nullptr);

webrtc::PeerConnectionInterface::RTCConfiguration config;

config.sdp_semantics = webrtc::SdpSemantics::kUnifiedPlan;

config.enable_dtls_srtp = true;

webrtc::PeerConnectionInterface::IceServer server;

server.uri = "stun:address.of.my.stun.server";

config.servers.push_back(server);

mPc = mPcf->CreatePeerConnection(

config, nullptr, nullptr, this);

assert(mPc != nullptr);

std::unique_ptr<cricket::VideoCapturer> videoDevice = OpenVideoCaptureDevice();

rtc::scoped_refptr<webrtc::VideoTrackInterface> videoTrack(

mPc->CreateVideoTrack(

kVideoLabel,

mPcf->CreateVideoSource(std::move(videoDevice), nullptr)

)

);

auto res = mPc->AddTrack(videoTrack, { "videoStreamId-123" });

assert(res.ok());

mPc->CreateOffer(this, webrtc::PeerConnectionInterface::RTCOfferAnswerOptions());

thread->Run();

}

// other interface callbacks

private:

rtc::scoped_refptr<webrtc::PeerConnectionFactoryInterface> mPcf;

rtc::scoped_refptr<webrtc::PeerConnectionInterface> mPc;

rtc::PhysicalSocketServer mServer;

rtc::Thread mSignalingThread;

}

int main()

{

rtc::InitializeSSL();

MockClient client;

sleep(10000000);

rtc::CleanupSSL();

return 0;

}

Regards.

[chen chen]

After I modified the example, I finally find out, the ice procedure will not start until the local sdp is set.