1 files changed, 98 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/rtp_media_utils.cc b/third_party/libwebrtc/pc/rtp_media_utils.cc
new file mode 100644
index 0000000000..52c5bb0eac
--- /dev/null
+++ b/third_party/libwebrtc/pc/rtp_media_utils.cc
@@ -0,0 +1,98 @@
+/*
+ *  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.
+ */
+
+#include "pc/rtp_media_utils.h"
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+RtpTransceiverDirection RtpTransceiverDirectionFromSendRecv(bool send,
+                                                            bool recv) {
+  if (send && recv) {
+    return RtpTransceiverDirection::kSendRecv;
+  } else if (send && !recv) {
+    return RtpTransceiverDirection::kSendOnly;
+  } else if (!send && recv) {
+    return RtpTransceiverDirection::kRecvOnly;
+  } else {
+    return RtpTransceiverDirection::kInactive;
+  }
+}
+
+bool RtpTransceiverDirectionHasSend(RtpTransceiverDirection direction) {
+  return direction == RtpTransceiverDirection::kSendRecv ||
+         direction == RtpTransceiverDirection::kSendOnly;
+}
+
+bool RtpTransceiverDirectionHasRecv(RtpTransceiverDirection direction) {
+  return direction == RtpTransceiverDirection::kSendRecv ||
+         direction == RtpTransceiverDirection::kRecvOnly;
+}
+
+RtpTransceiverDirection RtpTransceiverDirectionReversed(
+    RtpTransceiverDirection direction) {
+  switch (direction) {
+    case RtpTransceiverDirection::kSendRecv:
+    case RtpTransceiverDirection::kInactive:
+    case RtpTransceiverDirection::kStopped:
+      return direction;
+    case RtpTransceiverDirection::kSendOnly:
+      return RtpTransceiverDirection::kRecvOnly;
+    case RtpTransceiverDirection::kRecvOnly:
+      return RtpTransceiverDirection::kSendOnly;
+    default:
+      RTC_DCHECK_NOTREACHED();
+      return direction;
+  }
+}
+
+RtpTransceiverDirection RtpTransceiverDirectionWithSendSet(
+    RtpTransceiverDirection direction,
+    bool send) {
+  return RtpTransceiverDirectionFromSendRecv(
+      send, RtpTransceiverDirectionHasRecv(direction));
+}
+
+RtpTransceiverDirection RtpTransceiverDirectionWithRecvSet(
+    RtpTransceiverDirection direction,
+    bool recv) {
+  return RtpTransceiverDirectionFromSendRecv(
+      RtpTransceiverDirectionHasSend(direction), recv);
+}
+
+const char* RtpTransceiverDirectionToString(RtpTransceiverDirection direction) {
+  switch (direction) {
+    case RtpTransceiverDirection::kSendRecv:
+      return "kSendRecv";
+    case RtpTransceiverDirection::kSendOnly:
+      return "kSendOnly";
+    case RtpTransceiverDirection::kRecvOnly:
+      return "kRecvOnly";
+    case RtpTransceiverDirection::kInactive:
+      return "kInactive";
+    case RtpTransceiverDirection::kStopped:
+      return "kStopped";
+  }
+  RTC_DCHECK_NOTREACHED();
+  return "";
+}
+
+RtpTransceiverDirection RtpTransceiverDirectionIntersection(
+    RtpTransceiverDirection lhs,
+    RtpTransceiverDirection rhs) {
+  return RtpTransceiverDirectionFromSendRecv(
+      RtpTransceiverDirectionHasSend(lhs) &&
+          RtpTransceiverDirectionHasSend(rhs),
+      RtpTransceiverDirectionHasRecv(lhs) &&
+          RtpTransceiverDirectionHasRecv(rhs));
+}
+
+}  // namespace webrtc