1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/sdp_state_provider.h b/third_party/libwebrtc/pc/sdp_state_provider.h
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+++ b/third_party/libwebrtc/pc/sdp_state_provider.h
@@ -0,0 +1,54 @@
+/*
+ *  Copyright 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef PC_SDP_STATE_PROVIDER_H_
+#define PC_SDP_STATE_PROVIDER_H_
+
+#include <string>
+
+#include "api/jsep.h"
+#include "api/peer_connection_interface.h"
+
+namespace webrtc {
+
+// This interface provides access to the state of an SDP offer/answer
+// negotiation.
+//
+// All the functions are const, so using this interface serves as
+// assurance that the user is not modifying the state.
+class SdpStateProvider {
+ public:
+  virtual ~SdpStateProvider() {}
+
+  virtual PeerConnectionInterface::SignalingState signaling_state() const = 0;
+
+  virtual const SessionDescriptionInterface* local_description() const = 0;
+  virtual const SessionDescriptionInterface* remote_description() const = 0;
+  virtual const SessionDescriptionInterface* current_local_description()
+      const = 0;
+  virtual const SessionDescriptionInterface* current_remote_description()
+      const = 0;
+  virtual const SessionDescriptionInterface* pending_local_description()
+      const = 0;
+  virtual const SessionDescriptionInterface* pending_remote_description()
+      const = 0;
+
+  // Whether an ICE restart has been asked for. Used in CreateOffer.
+  virtual bool NeedsIceRestart(const std::string& content_name) const = 0;
+  // Whether an ICE restart was indicated in the remote offer.
+  // Used in CreateAnswer.
+  virtual bool IceRestartPending(const std::string& content_name) const = 0;
+  virtual absl::optional<rtc::SSLRole> GetDtlsRole(
+      const std::string& mid) const = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // PC_SDP_STATE_PROVIDER_H_