1 files changed, 77 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/usage_pattern.h b/third_party/libwebrtc/pc/usage_pattern.h
new file mode 100644
index 0000000000..14373303ed
--- /dev/null
+++ b/third_party/libwebrtc/pc/usage_pattern.h
@@ -0,0 +1,77 @@
+/*
+ *  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_USAGE_PATTERN_H_
+#define PC_USAGE_PATTERN_H_
+
+#include "api/peer_connection_interface.h"
+
+namespace webrtc {
+
+class PeerConnectionObserver;
+
+// A bit in the usage pattern is registered when its defining event occurs
+// at least once.
+enum class UsageEvent : int {
+  TURN_SERVER_ADDED = 0x01,
+  STUN_SERVER_ADDED = 0x02,
+  DATA_ADDED = 0x04,
+  AUDIO_ADDED = 0x08,
+  VIDEO_ADDED = 0x10,
+  // `SetLocalDescription` returns successfully.
+  SET_LOCAL_DESCRIPTION_SUCCEEDED = 0x20,
+  // `SetRemoteDescription` returns successfully.
+  SET_REMOTE_DESCRIPTION_SUCCEEDED = 0x40,
+  // A local candidate (with type host, server-reflexive, or relay) is
+  // collected.
+  CANDIDATE_COLLECTED = 0x80,
+  // A remote candidate is successfully added via `AddIceCandidate`.
+  ADD_ICE_CANDIDATE_SUCCEEDED = 0x100,
+  ICE_STATE_CONNECTED = 0x200,
+  CLOSE_CALLED = 0x400,
+  // A local candidate with private IP is collected.
+  PRIVATE_CANDIDATE_COLLECTED = 0x800,
+  // A remote candidate with private IP is added, either via AddiceCandidate
+  // or from the remote description.
+  REMOTE_PRIVATE_CANDIDATE_ADDED = 0x1000,
+  // A local mDNS candidate is collected.
+  MDNS_CANDIDATE_COLLECTED = 0x2000,
+  // A remote mDNS candidate is added, either via AddIceCandidate or from the
+  // remote description.
+  REMOTE_MDNS_CANDIDATE_ADDED = 0x4000,
+  // A local candidate with IPv6 address is collected.
+  IPV6_CANDIDATE_COLLECTED = 0x8000,
+  // A remote candidate with IPv6 address is added, either via AddIceCandidate
+  // or from the remote description.
+  REMOTE_IPV6_CANDIDATE_ADDED = 0x10000,
+  // A remote candidate (with type host, server-reflexive, or relay) is
+  // successfully added, either via AddIceCandidate or from the remote
+  // description.
+  REMOTE_CANDIDATE_ADDED = 0x20000,
+  // An explicit host-host candidate pair is selected, i.e. both the local and
+  // the remote candidates have the host type. This does not include candidate
+  // pairs formed with equivalent prflx remote candidates, e.g. a host-prflx
+  // pair where the prflx candidate has the same base as a host candidate of
+  // the remote peer.
+  DIRECT_CONNECTION_SELECTED = 0x40000,
+  MAX_VALUE = 0x80000,
+};
+
+class UsagePattern {
+ public:
+  void NoteUsageEvent(UsageEvent event);
+  void ReportUsagePattern(PeerConnectionObserver* observer) const;
+
+ private:
+  int usage_event_accumulator_ = 0;
+};
+
+}  // namespace webrtc
+#endif  // PC_USAGE_PATTERN_H_