src/third_party/libjingle/source/talk/app/webrtc/peerconnection.h

   1 /*
   2  * libjingle
   3  * Copyright 2012, Google Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
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   7  *
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  11  *     this list of conditions and the following disclaimer in the documentation
  12  *     and/or other materials provided with the distribution.
  13  *  3. The name of the author may not be used to endorse or promote products
  14  *     derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef TALK_APP_WEBRTC_PEERCONNECTION_H_
  29 #define TALK_APP_WEBRTC_PEERCONNECTION_H_
  30
  31 #include <string>
  32
  33 #include "talk/app/webrtc/mediastreamsignaling.h"
  34 #include "talk/app/webrtc/peerconnectioninterface.h"
  35 #include "talk/app/webrtc/peerconnectionfactory.h"
  36 #include "talk/app/webrtc/statscollector.h"
  37 #include "talk/app/webrtc/streamcollection.h"
  38 #include "talk/app/webrtc/webrtcsession.h"
  39 #include "talk/base/scoped_ptr.h"
  40
  41 namespace webrtc {
  42 class MediaStreamHandlerContainer;
  43
  44 typedef std::vector<PortAllocatorFactoryInterface::StunConfiguration>
  45     StunConfigurations;
  46 typedef std::vector<PortAllocatorFactoryInterface::TurnConfiguration>
  47     TurnConfigurations;
  48
  49 // PeerConnectionImpl implements the PeerConnection interface.
  50 // It uses MediaStreamSignaling and WebRtcSession to implement
  51 // the PeerConnection functionality.
  52 class PeerConnection : public PeerConnectionInterface,
  53                        public MediaStreamSignalingObserver,
  54                        public IceObserver,
  55                        public talk_base::MessageHandler,
  56                        public sigslot::has_slots<> {
  57  public:
  58   explicit PeerConnection(PeerConnectionFactory* factory);
  59
  60   bool Initialize(
  61       const PeerConnectionInterface::RTCConfiguration& configuration,
  62       const MediaConstraintsInterface* constraints,
  63       PortAllocatorFactoryInterface* allocator_factory,
  64       DTLSIdentityServiceInterface* dtls_identity_service,
  65       PeerConnectionObserver* observer);
  66   virtual talk_base::scoped_refptr<StreamCollectionInterface> local_streams();
  67   virtual talk_base::scoped_refptr<StreamCollectionInterface> remote_streams();
  68   virtual bool AddStream(MediaStreamInterface* local_stream,
  69                          const MediaConstraintsInterface* constraints);
  70   virtual void RemoveStream(MediaStreamInterface* local_stream);
  71
  72   virtual talk_base::scoped_refptr<DtmfSenderInterface> CreateDtmfSender(
  73       AudioTrackInterface* track);
  74
  75   virtual talk_base::scoped_refptr<DataChannelInterface> CreateDataChannel(
  76       const std::string& label,
  77       const DataChannelInit* config);
  78   virtual bool GetStats(StatsObserver* observer,
  79                         webrtc::MediaStreamTrackInterface* track,
  80                         StatsOutputLevel level);
  81
  82   virtual SignalingState signaling_state();
  83
  84   // TODO(bemasc): Remove ice_state() when callers are removed.
  85   virtual IceState ice_state();
  86   virtual IceConnectionState ice_connection_state();
  87   virtual IceGatheringState ice_gathering_state();
  88
  89   virtual const SessionDescriptionInterface* local_description() const;
  90   virtual const SessionDescriptionInterface* remote_description() const;
  91
  92   // JSEP01
  93   virtual void CreateOffer(CreateSessionDescriptionObserver* observer,
  94                            const MediaConstraintsInterface* constraints);
  95   virtual void CreateAnswer(CreateSessionDescriptionObserver* observer,
  96                             const MediaConstraintsInterface* constraints);
  97   virtual void SetLocalDescription(SetSessionDescriptionObserver* observer,
  98                                    SessionDescriptionInterface* desc);
  99   virtual void SetRemoteDescription(SetSessionDescriptionObserver* observer,
 100                                     SessionDescriptionInterface* desc);
 101   // TODO(mallinath) : Deprecated version, remove after all clients are updated.
 102   virtual bool UpdateIce(const IceServers& configuration,
 103                          const MediaConstraintsInterface* constraints);
 104   virtual bool UpdateIce(
 105       const PeerConnectionInterface::RTCConfiguration& config);
 106   virtual bool AddIceCandidate(const IceCandidateInterface* candidate);
 107
 108   virtual void RegisterUMAObserver(UMAObserver* observer);
 109
 110   virtual void Close();
 111
 112  protected:
 113   virtual ~PeerConnection();
 114
 115  private:
 116   // Implements MessageHandler.
 117   virtual void OnMessage(talk_base::Message* msg);
 118
 119   // Implements MediaStreamSignalingObserver.
 120   virtual void OnAddRemoteStream(MediaStreamInterface* stream) OVERRIDE;
 121   virtual void OnRemoveRemoteStream(MediaStreamInterface* stream) OVERRIDE;
 122   virtual void OnAddDataChannel(DataChannelInterface* data_channel) OVERRIDE;
 123   virtual void OnAddRemoteAudioTrack(MediaStreamInterface* stream,
 124                                      AudioTrackInterface* audio_track,
 125                                      uint32 ssrc) OVERRIDE;
 126   virtual void OnAddRemoteVideoTrack(MediaStreamInterface* stream,
 127                                      VideoTrackInterface* video_track,
 128                                      uint32 ssrc) OVERRIDE;
 129   virtual void OnRemoveRemoteAudioTrack(
 130       MediaStreamInterface* stream,
 131       AudioTrackInterface* audio_track) OVERRIDE;
 132   virtual void OnRemoveRemoteVideoTrack(
 133       MediaStreamInterface* stream,
 134       VideoTrackInterface* video_track) OVERRIDE;
 135   virtual void OnAddLocalAudioTrack(MediaStreamInterface* stream,
 136                                     AudioTrackInterface* audio_track,
 137                                     uint32 ssrc) OVERRIDE;
 138   virtual void OnAddLocalVideoTrack(MediaStreamInterface* stream,
 139                                     VideoTrackInterface* video_track,
 140                                     uint32 ssrc) OVERRIDE;
 141   virtual void OnRemoveLocalAudioTrack(
 142       MediaStreamInterface* stream,
 143       AudioTrackInterface* audio_track,
 144       uint32 ssrc) OVERRIDE;
 145   virtual void OnRemoveLocalVideoTrack(
 146       MediaStreamInterface* stream,
 147       VideoTrackInterface* video_track) OVERRIDE;
 148   virtual void OnRemoveLocalStream(MediaStreamInterface* stream);
 149
 150   // Implements IceObserver
 151   virtual void OnIceConnectionChange(IceConnectionState new_state);
 152   virtual void OnIceGatheringChange(IceGatheringState new_state);
 153   virtual void OnIceCandidate(const IceCandidateInterface* candidate);
 154   virtual void OnIceComplete();
 155
 156   // Signals from WebRtcSession.
 157   void OnSessionStateChange(cricket::BaseSession* session,
 158                             cricket::BaseSession::State state);
 159   void ChangeSignalingState(SignalingState signaling_state);
 160
 161   bool DoInitialize(IceTransportsType type,
 162                     const StunConfigurations& stun_config,
 163                     const TurnConfigurations& turn_config,
 164                     const MediaConstraintsInterface* constraints,
 165                     PortAllocatorFactoryInterface* allocator_factory,
 166                     DTLSIdentityServiceInterface* dtls_identity_service,
 167                     PeerConnectionObserver* observer);
 168
 169   talk_base::Thread* signaling_thread() const {
 170     return factory_->signaling_thread();
 171   }
 172
 173   void PostSetSessionDescriptionFailure(SetSessionDescriptionObserver* observer,
 174                                         const std::string& error);
 175
 176   bool IsClosed() const {
 177     return signaling_state_ == PeerConnectionInterface::kClosed;
 178   }
 179
 180   // Storing the factory as a scoped reference pointer ensures that the memory
 181   // in the PeerConnectionFactoryImpl remains available as long as the
 182   // PeerConnection is running. It is passed to PeerConnection as a raw pointer.
 183   // However, since the reference counting is done in the
 184   // PeerConnectionFactoryInteface all instances created using the raw pointer
 185   // will refer to the same reference count.
 186   talk_base::scoped_refptr<PeerConnectionFactory> factory_;
 187   PeerConnectionObserver* observer_;
 188   UMAObserver* uma_observer_;
 189   SignalingState signaling_state_;
 190   // TODO(bemasc): Remove ice_state_.
 191   IceState ice_state_;
 192   IceConnectionState ice_connection_state_;
 193   IceGatheringState ice_gathering_state_;
 194
 195   talk_base::scoped_ptr<cricket::PortAllocator> port_allocator_;
 196   talk_base::scoped_ptr<WebRtcSession> session_;
 197   talk_base::scoped_ptr<MediaStreamSignaling> mediastream_signaling_;
 198   talk_base::scoped_ptr<MediaStreamHandlerContainer> stream_handler_container_;
 199   StatsCollector stats_;
 200 };
 201
 202 }  // namespace webrtc
 203
 204 #endif  // TALK_APP_WEBRTC_PEERCONNECTION_H_