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      1 /*
      2  * libjingle
      3  * Copyright 2004 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_SESSION_MEDIA_MEDIASESSIONCLIENT_H_
     29 #define TALK_SESSION_MEDIA_MEDIASESSIONCLIENT_H_
     30 
     31 #include <algorithm>
     32 #include <map>
     33 #include <string>
     34 #include <vector>
     35 #include "talk/media/base/cryptoparams.h"
     36 #include "talk/p2p/base/session.h"
     37 #include "talk/p2p/base/sessionclient.h"
     38 #include "talk/p2p/base/sessiondescription.h"
     39 #include "talk/p2p/base/sessionmanager.h"
     40 #include "talk/session/media/call.h"
     41 #include "talk/session/media/channelmanager.h"
     42 #include "talk/session/media/mediasession.h"
     43 #include "webrtc/base/messagequeue.h"
     44 #include "webrtc/base/sigslot.h"
     45 #include "webrtc/base/sigslotrepeater.h"
     46 #include "webrtc/base/thread.h"
     47 
     48 namespace cricket {
     49 
     50 class Call;
     51 
     52 class MediaSessionClient : public SessionClient, public sigslot::has_slots<> {
     53  public:
     54 #if !defined(DISABLE_MEDIA_ENGINE_FACTORY)
     55   MediaSessionClient(const buzz::Jid& jid, SessionManager *manager);
     56 #endif
     57   // Alternative constructor, allowing injection of media_engine
     58   // and device_manager.
     59   MediaSessionClient(const buzz::Jid& jid, SessionManager *manager,
     60                      MediaEngineInterface* media_engine,
     61                      DataEngineInterface* data_media_engine,
     62                      DeviceManagerInterface* device_manager);
     63   ~MediaSessionClient();
     64 
     65   const buzz::Jid &jid() const { return jid_; }
     66   SessionManager* session_manager() const { return session_manager_; }
     67   ChannelManager* channel_manager() const { return channel_manager_; }
     68 
     69   // Return mapping of call ids to Calls.
     70   const std::map<uint32, Call *>& calls() const { return calls_; }
     71 
     72   // The settings below combine with the settings on SessionManager to choose
     73 
     74   // whether SDES-SRTP, DTLS-SRTP, or no security should be used. The possible
     75   // combinations are shown in the following table. Note that where either DTLS
     76   // or SDES is possible, DTLS is preferred. Thus to require either SDES or
     77   // DTLS, but not mandate DTLS, set SDES to require and DTLS to enable.
     78   //
     79   //              | SDES:Disable   | SDES:Enable    | SDES:Require   |
     80   // ----------------------------------------------------------------|
     81   // DTLS:Disable | No SRTP        | SDES Optional  | SDES Mandatory |
     82   // DTLS:Enable  | DTLS Optional  | DTLS/SDES Opt  | DTLS/SDES Mand |
     83   // DTLS:Require | DTLS Mandatory | DTLS Mandatory | DTLS Mandatory |
     84 
     85   // Control use of SDES-SRTP.
     86   SecurePolicy secure() const { return desc_factory_.secure(); }
     87   void set_secure(SecurePolicy s) { desc_factory_.set_secure(s); }
     88 
     89   // Control use of multiple sessions in a call.
     90   void set_multisession_enabled(bool multisession_enabled) {
     91     multisession_enabled_ = multisession_enabled;
     92   }
     93 
     94   int GetCapabilities() { return channel_manager_->GetCapabilities(); }
     95 
     96   Call *CreateCall();
     97   void DestroyCall(Call *call);
     98 
     99   Call *GetFocus();
    100   void SetFocus(Call *call);
    101 
    102   void JoinCalls(Call *call_to_join, Call *call);
    103 
    104   bool GetAudioInputDevices(std::vector<std::string>* names) {
    105     return channel_manager_->GetAudioInputDevices(names);
    106   }
    107   bool GetAudioOutputDevices(std::vector<std::string>* names) {
    108     return channel_manager_->GetAudioOutputDevices(names);
    109   }
    110   bool GetVideoCaptureDevices(std::vector<std::string>* names) {
    111     return channel_manager_->GetVideoCaptureDevices(names);
    112   }
    113 
    114   bool SetAudioOptions(const std::string& in_name, const std::string& out_name,
    115                        const AudioOptions& options) {
    116     return channel_manager_->SetAudioOptions(in_name, out_name, options);
    117   }
    118   bool SetOutputVolume(int level) {
    119     return channel_manager_->SetOutputVolume(level);
    120   }
    121   bool SetCaptureDevice(const std::string& cam_device) {
    122     return channel_manager_->SetCaptureDevice(cam_device);
    123   }
    124 
    125   SessionDescription* CreateOffer(const CallOptions& options) {
    126     return desc_factory_.CreateOffer(options, NULL);
    127   }
    128   SessionDescription* CreateAnswer(const SessionDescription* offer,
    129                                    const CallOptions& options) {
    130     return desc_factory_.CreateAnswer(offer, options, NULL);
    131   }
    132 
    133   sigslot::signal2<Call *, Call *> SignalFocus;
    134   sigslot::signal1<Call *> SignalCallCreate;
    135   sigslot::signal1<Call *> SignalCallDestroy;
    136   sigslot::repeater0<> SignalDevicesChange;
    137 
    138   virtual bool ParseContent(SignalingProtocol protocol,
    139                             const buzz::XmlElement* elem,
    140                             ContentDescription** content,
    141                             ParseError* error);
    142   virtual bool IsWritable(SignalingProtocol protocol,
    143                           const ContentDescription* content);
    144   virtual bool WriteContent(SignalingProtocol protocol,
    145                             const ContentDescription* content,
    146                             buzz::XmlElement** elem,
    147                             WriteError* error);
    148 
    149  private:
    150   void Construct();
    151   void OnSessionCreate(Session *session, bool received_initiate);
    152   void OnSessionState(BaseSession *session, BaseSession::State state);
    153   void OnSessionDestroy(Session *session);
    154   Session *CreateSession(Call *call);
    155   Session *CreateSession(const std::string& id, Call* call);
    156   Call *FindCallByRemoteName(const std::string &remote_name);
    157 
    158   buzz::Jid jid_;
    159   SessionManager* session_manager_;
    160   Call *focus_call_;
    161   ChannelManager *channel_manager_;
    162   MediaSessionDescriptionFactory desc_factory_;
    163   bool multisession_enabled_;
    164   std::map<uint32, Call *> calls_;
    165 
    166   // Maintain a mapping of session id to call.
    167   typedef std::map<std::string, Call *> SessionMap;
    168   SessionMap session_map_;
    169 
    170   friend class Call;
    171 };
    172 
    173 }  // namespace cricket
    174 
    175 #endif  // TALK_SESSION_MEDIA_MEDIASESSIONCLIENT_H_
    176