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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  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(const PeerConnectionInterface::IceServers& configuration,
  61                   const MediaConstraintsInterface* constraints,
  62                   PortAllocatorFactoryInterface* allocator_factory,
  63                   DTLSIdentityServiceInterface* dtls_identity_service,
  64                   PeerConnectionObserver* observer);
  65   virtual talk_base::scoped_refptr<StreamCollectionInterface> local_streams();
  66   virtual talk_base::scoped_refptr<StreamCollectionInterface> remote_streams();
  67   virtual bool AddStream(MediaStreamInterface* local_stream,
  68                          const MediaConstraintsInterface* constraints);
  69   virtual void RemoveStream(MediaStreamInterface* local_stream);
  70
  71   virtual talk_base::scoped_refptr<DtmfSenderInterface> CreateDtmfSender(
  72       AudioTrackInterface* track);
  73
  74   virtual talk_base::scoped_refptr<DataChannelInterface> CreateDataChannel(
  75       const std::string& label,
  76       const DataChannelInit* config);
  77   virtual bool GetStats(StatsObserver* observer,
  78                         webrtc::MediaStreamTrackInterface* track);
  79   virtual bool GetStats(StatsObserver* observer,
  80                         webrtc::MediaStreamTrackInterface* track,
  81                         StatsOutputLevel level);
  82
  83   virtual SignalingState signaling_state();
  84
  85   // TODO(bemasc): Remove ice_state() when callers are removed.
  86   virtual IceState ice_state();
  87   virtual IceConnectionState ice_connection_state();
  88   virtual IceGatheringState ice_gathering_state();
  89
  90   virtual const SessionDescriptionInterface* local_description() const;
  91   virtual const SessionDescriptionInterface* remote_description() const;
  92
  93   // JSEP01
  94   virtual void CreateOffer(CreateSessionDescriptionObserver* observer,
  95                            const MediaConstraintsInterface* constraints);
  96   virtual void CreateAnswer(CreateSessionDescriptionObserver* observer,
  97                             const MediaConstraintsInterface* constraints);
  98   virtual void SetLocalDescription(SetSessionDescriptionObserver* observer,
  99                                    SessionDescriptionInterface* desc);
 100   virtual void SetRemoteDescription(SetSessionDescriptionObserver* observer,
 101                                     SessionDescriptionInterface* desc);
 102   virtual bool UpdateIce(const IceServers& configuration,
 103                          const MediaConstraintsInterface* constraints);
 104   virtual bool AddIceCandidate(const IceCandidateInterface* candidate);
 105
 106   virtual void Close();
 107
 108  protected:
 109   virtual ~PeerConnection();
 110
 111  private:
 112   // Implements MessageHandler.
 113   virtual void OnMessage(talk_base::Message* msg);
 114
 115   // Implements MediaStreamSignalingObserver.
 116   virtual void OnAddRemoteStream(MediaStreamInterface* stream) OVERRIDE;
 117   virtual void OnRemoveRemoteStream(MediaStreamInterface* stream) OVERRIDE;
 118   virtual void OnAddDataChannel(DataChannelInterface* data_channel) OVERRIDE;
 119   virtual void OnAddRemoteAudioTrack(MediaStreamInterface* stream,
 120                                      AudioTrackInterface* audio_track,
 121                                      uint32 ssrc) OVERRIDE;
 122   virtual void OnAddRemoteVideoTrack(MediaStreamInterface* stream,
 123                                      VideoTrackInterface* video_track,
 124                                      uint32 ssrc) OVERRIDE;
 125   virtual void OnRemoveRemoteAudioTrack(
 126       MediaStreamInterface* stream,
 127       AudioTrackInterface* audio_track) OVERRIDE;
 128   virtual void OnRemoveRemoteVideoTrack(
 129       MediaStreamInterface* stream,
 130       VideoTrackInterface* video_track) OVERRIDE;
 131   virtual void OnAddLocalAudioTrack(MediaStreamInterface* stream,
 132                                     AudioTrackInterface* audio_track,
 133                                     uint32 ssrc) OVERRIDE;
 134   virtual void OnAddLocalVideoTrack(MediaStreamInterface* stream,
 135                                     VideoTrackInterface* video_track,
 136                                     uint32 ssrc) OVERRIDE;
 137   virtual void OnRemoveLocalAudioTrack(
 138       MediaStreamInterface* stream,
 139       AudioTrackInterface* audio_track) OVERRIDE;
 140   virtual void OnRemoveLocalVideoTrack(
 141       MediaStreamInterface* stream,
 142       VideoTrackInterface* video_track) OVERRIDE;
 143   virtual void OnRemoveLocalStream(MediaStreamInterface* stream);
 144
 145   // Implements IceObserver
 146   virtual void OnIceConnectionChange(IceConnectionState new_state);
 147   virtual void OnIceGatheringChange(IceGatheringState new_state);
 148   virtual void OnIceCandidate(const IceCandidateInterface* candidate);
 149   virtual void OnIceComplete();
 150
 151   // Signals from WebRtcSession.
 152   void OnSessionStateChange(cricket::BaseSession* session,
 153                             cricket::BaseSession::State state);
 154   void ChangeSignalingState(SignalingState signaling_state);
 155
 156   bool DoInitialize(const StunConfigurations& stun_config,
 157                     const TurnConfigurations& turn_config,
 158                     const MediaConstraintsInterface* constraints,
 159                     PortAllocatorFactoryInterface* allocator_factory,
 160                     DTLSIdentityServiceInterface* dtls_identity_service,
 161                     PeerConnectionObserver* observer);
 162
 163   talk_base::Thread* signaling_thread() const {
 164     return factory_->signaling_thread();
 165   }
 166
 167   void PostSetSessionDescriptionFailure(SetSessionDescriptionObserver* observer,
 168                                         const std::string& error);
 169
 170   bool IsClosed() const {
 171     return signaling_state_ == PeerConnectionInterface::kClosed;
 172   }
 173
 174   // Storing the factory as a scoped reference pointer ensures that the memory
 175   // in the PeerConnectionFactoryImpl remains available as long as the
 176   // PeerConnection is running. It is passed to PeerConnection as a raw pointer.
 177   // However, since the reference counting is done in the
 178   // PeerConnectionFactoryInteface all instances created using the raw pointer
 179   // will refer to the same reference count.
 180   talk_base::scoped_refptr<PeerConnectionFactory> factory_;
 181   PeerConnectionObserver* observer_;
 182   SignalingState signaling_state_;
 183   // TODO(bemasc): Remove ice_state_.
 184   IceState ice_state_;
 185   IceConnectionState ice_connection_state_;
 186   IceGatheringState ice_gathering_state_;
 187
 188   talk_base::scoped_ptr<cricket::PortAllocator> port_allocator_;
 189   talk_base::scoped_ptr<WebRtcSession> session_;
 190   talk_base::scoped_ptr<MediaStreamSignaling> mediastream_signaling_;
 191   talk_base::scoped_ptr<MediaStreamHandlerContainer> stream_handler_container_;
 192   StatsCollector stats_;
 193 };
 194
 195 }  // namespace webrtc
 196
 197 #endif  // TALK_APP_WEBRTC_PEERCONNECTION_H_