third_party/libwebrtc/pc/sdp_state_provider.h

   1 /*
   2  *  Copyright 2020 The WebRTC project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #ifndef PC_SDP_STATE_PROVIDER_H_
  12 #define PC_SDP_STATE_PROVIDER_H_
  13
  14 #include <string>
  15
  16 #include "api/jsep.h"
  17 #include "api/peer_connection_interface.h"
  18
  19 namespace webrtc {
  20
  21 // This interface provides access to the state of an SDP offer/answer
  22 // negotiation.
  23 //
  24 // All the functions are const, so using this interface serves as
  25 // assurance that the user is not modifying the state.
  26 class SdpStateProvider {
  27  public:
  28   virtual ~SdpStateProvider() {}
  29
  30   virtual PeerConnectionInterface::SignalingState signaling_state() const = 0;
  31
  32   virtual const SessionDescriptionInterface* local_description() const = 0;
  33   virtual const SessionDescriptionInterface* remote_description() const = 0;
  34   virtual const SessionDescriptionInterface* current_local_description()
  35       const = 0;
  36   virtual const SessionDescriptionInterface* current_remote_description()
  37       const = 0;
  38   virtual const SessionDescriptionInterface* pending_local_description()
  39       const = 0;
  40   virtual const SessionDescriptionInterface* pending_remote_description()
  41       const = 0;
  42
  43   // Whether an ICE restart has been asked for. Used in CreateOffer.
  44   virtual bool NeedsIceRestart(const std::string& content_name) const = 0;
  45   // Whether an ICE restart was indicated in the remote offer.
  46   // Used in CreateAnswer.
  47   virtual bool IceRestartPending(const std::string& content_name) const = 0;
  48   virtual absl::optional<rtc::SSLRole> GetDtlsRole(
  49       const std::string& mid) const = 0;
  50 };
  51
  52 }  // namespace webrtc
  53
  54 #endif  // PC_SDP_STATE_PROVIDER_H_