1/*
2 * libjingle
3 * Copyright 2012, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
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,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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/peerconnectionfactory.h"
35#include "talk/app/webrtc/peerconnectioninterface.h"
36#include "talk/app/webrtc/statscollector.h"
37#include "talk/app/webrtc/streamcollection.h"
38#include "talk/app/webrtc/webrtcsession.h"
39#include "webrtc/base/scoped_ptr.h"
40
41namespace webrtc {
42class MediaStreamHandlerContainer;
43
44typedef std::vector<PortAllocatorFactoryInterface::StunConfiguration>
45    StunConfigurations;
46typedef 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.
52class PeerConnection : public PeerConnectionInterface,
53                       public MediaStreamSignalingObserver,
54                       public IceObserver,
55                       public rtc::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 rtc::scoped_refptr<StreamCollectionInterface> local_streams();
67  virtual rtc::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 rtc::scoped_refptr<DtmfSenderInterface> CreateDtmfSender(
73      AudioTrackInterface* track);
74
75  virtual rtc::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 CreateOffer(CreateSessionDescriptionObserver* observer,
96                           const RTCOfferAnswerOptions& options);
97  virtual void CreateAnswer(CreateSessionDescriptionObserver* observer,
98                            const MediaConstraintsInterface* constraints);
99  virtual void SetLocalDescription(SetSessionDescriptionObserver* observer,
100                                   SessionDescriptionInterface* desc);
101  virtual void SetRemoteDescription(SetSessionDescriptionObserver* observer,
102                                    SessionDescriptionInterface* desc);
103  // TODO(mallinath) : Deprecated version, remove after all clients are updated.
104  virtual bool UpdateIce(const IceServers& configuration,
105                         const MediaConstraintsInterface* constraints);
106  virtual bool UpdateIce(
107      const PeerConnectionInterface::RTCConfiguration& config);
108  virtual bool AddIceCandidate(const IceCandidateInterface* candidate);
109
110  virtual void RegisterUMAObserver(UMAObserver* observer);
111
112  virtual void Close();
113
114 protected:
115  virtual ~PeerConnection();
116
117 private:
118  // Implements MessageHandler.
119  virtual void OnMessage(rtc::Message* msg);
120
121  // Implements MediaStreamSignalingObserver.
122  virtual void OnAddRemoteStream(MediaStreamInterface* stream) OVERRIDE;
123  virtual void OnRemoveRemoteStream(MediaStreamInterface* stream) OVERRIDE;
124  virtual void OnAddDataChannel(DataChannelInterface* data_channel) OVERRIDE;
125  virtual void OnAddRemoteAudioTrack(MediaStreamInterface* stream,
126                                     AudioTrackInterface* audio_track,
127                                     uint32 ssrc) OVERRIDE;
128  virtual void OnAddRemoteVideoTrack(MediaStreamInterface* stream,
129                                     VideoTrackInterface* video_track,
130                                     uint32 ssrc) OVERRIDE;
131  virtual void OnRemoveRemoteAudioTrack(
132      MediaStreamInterface* stream,
133      AudioTrackInterface* audio_track) OVERRIDE;
134  virtual void OnRemoveRemoteVideoTrack(
135      MediaStreamInterface* stream,
136      VideoTrackInterface* video_track) OVERRIDE;
137  virtual void OnAddLocalAudioTrack(MediaStreamInterface* stream,
138                                    AudioTrackInterface* audio_track,
139                                    uint32 ssrc) OVERRIDE;
140  virtual void OnAddLocalVideoTrack(MediaStreamInterface* stream,
141                                    VideoTrackInterface* video_track,
142                                    uint32 ssrc) OVERRIDE;
143  virtual void OnRemoveLocalAudioTrack(
144      MediaStreamInterface* stream,
145      AudioTrackInterface* audio_track,
146      uint32 ssrc) OVERRIDE;
147  virtual void OnRemoveLocalVideoTrack(
148      MediaStreamInterface* stream,
149      VideoTrackInterface* video_track) OVERRIDE;
150  virtual void OnRemoveLocalStream(MediaStreamInterface* stream);
151
152  // Implements IceObserver
153  virtual void OnIceConnectionChange(IceConnectionState new_state);
154  virtual void OnIceGatheringChange(IceGatheringState new_state);
155  virtual void OnIceCandidate(const IceCandidateInterface* candidate);
156  virtual void OnIceComplete();
157
158  // Signals from WebRtcSession.
159  void OnSessionStateChange(cricket::BaseSession* session,
160                            cricket::BaseSession::State state);
161  void ChangeSignalingState(SignalingState signaling_state);
162
163  bool DoInitialize(IceTransportsType type,
164                    const StunConfigurations& stun_config,
165                    const TurnConfigurations& turn_config,
166                    const MediaConstraintsInterface* constraints,
167                    PortAllocatorFactoryInterface* allocator_factory,
168                    DTLSIdentityServiceInterface* dtls_identity_service,
169                    PeerConnectionObserver* observer);
170
171  rtc::Thread* signaling_thread() const {
172    return factory_->signaling_thread();
173  }
174
175  void PostSetSessionDescriptionFailure(SetSessionDescriptionObserver* observer,
176                                        const std::string& error);
177
178  bool IsClosed() const {
179    return signaling_state_ == PeerConnectionInterface::kClosed;
180  }
181
182  // Storing the factory as a scoped reference pointer ensures that the memory
183  // in the PeerConnectionFactoryImpl remains available as long as the
184  // PeerConnection is running. It is passed to PeerConnection as a raw pointer.
185  // However, since the reference counting is done in the
186  // PeerConnectionFactoryInteface all instances created using the raw pointer
187  // will refer to the same reference count.
188  rtc::scoped_refptr<PeerConnectionFactory> factory_;
189  PeerConnectionObserver* observer_;
190  UMAObserver* uma_observer_;
191  SignalingState signaling_state_;
192  // TODO(bemasc): Remove ice_state_.
193  IceState ice_state_;
194  IceConnectionState ice_connection_state_;
195  IceGatheringState ice_gathering_state_;
196
197  rtc::scoped_ptr<cricket::PortAllocator> port_allocator_;
198  rtc::scoped_ptr<WebRtcSession> session_;
199  rtc::scoped_ptr<MediaStreamSignaling> mediastream_signaling_;
200  rtc::scoped_ptr<MediaStreamHandlerContainer> stream_handler_container_;
201  rtc::scoped_ptr<StatsCollector> stats_;
202};
203
204}  // namespace webrtc
205
206#endif  // TALK_APP_WEBRTC_PEERCONNECTION_H_
207