1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/rtp_media_utils.h b/third_party/libwebrtc/pc/rtp_media_utils.h
new file mode 100644
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+++ b/third_party/libwebrtc/pc/rtp_media_utils.h
@@ -0,0 +1,64 @@
+/*
+ *  Copyright 2017 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_RTP_MEDIA_UTILS_H_
+#define PC_RTP_MEDIA_UTILS_H_
+
+#include <ostream>  // no-presubmit-check TODO(webrtc:8982)
+
+#include "api/rtp_transceiver_direction.h"
+
+namespace webrtc {
+
+// Returns the RtpTransceiverDirection that satisfies specified send and receive
+// conditions.
+RtpTransceiverDirection RtpTransceiverDirectionFromSendRecv(bool send,
+                                                            bool recv);
+
+// Returns true only if the direction will send media.
+bool RtpTransceiverDirectionHasSend(RtpTransceiverDirection direction);
+
+// Returns true only if the direction will receive media.
+bool RtpTransceiverDirectionHasRecv(RtpTransceiverDirection direction);
+
+// Returns the RtpTransceiverDirection which is the reverse of the given
+// direction.
+RtpTransceiverDirection RtpTransceiverDirectionReversed(
+    RtpTransceiverDirection direction);
+
+// Returns the RtpTransceiverDirection with its send component set to `send`.
+RtpTransceiverDirection RtpTransceiverDirectionWithSendSet(
+    RtpTransceiverDirection direction,
+    bool send = true);
+
+// Returns the RtpTransceiverDirection with its recv component set to `recv`.
+RtpTransceiverDirection RtpTransceiverDirectionWithRecvSet(
+    RtpTransceiverDirection direction,
+    bool recv = true);
+
+// Returns an unspecified string representation of the given direction.
+const char* RtpTransceiverDirectionToString(RtpTransceiverDirection direction);
+
+// Returns the intersection of the directions of two transceivers.
+RtpTransceiverDirection RtpTransceiverDirectionIntersection(
+    RtpTransceiverDirection lhs,
+    RtpTransceiverDirection rhs);
+
+#ifdef WEBRTC_UNIT_TEST
+inline std::ostream& operator<<(  // no-presubmit-check TODO(webrtc:8982)
+    std::ostream& os,             // no-presubmit-check TODO(webrtc:8982)
+    RtpTransceiverDirection direction) {
+  return os << RtpTransceiverDirectionToString(direction);
+}
+#endif  // WEBRTC_UNIT_TEST
+
+}  // namespace webrtc
+
+#endif  // PC_RTP_MEDIA_UTILS_H_