snapshot of https://github.com/pion/webrtc.git (main, 2026-09-15; blobs > 131072B omitted)

rtptransceiverdirection.go

@@ -0,0 +1,95 @@
+// SPDX-FileCopyrightText: 2026 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package webrtc
+
+import "slices"
+
+// RTPTransceiverDirection indicates the direction of the RTPTransceiver.
+type RTPTransceiverDirection int
+
+const (
+	// RTPTransceiverDirectionUnknown is the enum's zero-value.
+	RTPTransceiverDirectionUnknown RTPTransceiverDirection = iota
+
+	// RTPTransceiverDirectionSendrecv indicates the RTPSender will offer
+	// to send RTP and the RTPReceiver will offer to receive RTP.
+	RTPTransceiverDirectionSendrecv
+
+	// RTPTransceiverDirectionSendonly indicates the RTPSender will offer
+	// to send RTP.
+	RTPTransceiverDirectionSendonly
+
+	// RTPTransceiverDirectionRecvonly indicates the RTPReceiver will
+	// offer to receive RTP.
+	RTPTransceiverDirectionRecvonly
+
+	// RTPTransceiverDirectionInactive indicates the RTPSender won't offer
+	// to send RTP and the RTPReceiver won't offer to receive RTP.
+	RTPTransceiverDirectionInactive
+)
+
+// This is done this way because of a linter.
+const (
+	rtpTransceiverDirectionSendrecvStr = "sendrecv"
+	rtpTransceiverDirectionSendonlyStr = "sendonly"
+	rtpTransceiverDirectionRecvonlyStr = "recvonly"
+	rtpTransceiverDirectionInactiveStr = "inactive"
+)
+
+// NewRTPTransceiverDirection defines a procedure for creating a new
+// RTPTransceiverDirection from a raw string naming the transceiver direction.
+func NewRTPTransceiverDirection(raw string) RTPTransceiverDirection {
+	switch raw {
+	case rtpTransceiverDirectionSendrecvStr:
+		return RTPTransceiverDirectionSendrecv
+	case rtpTransceiverDirectionSendonlyStr:
+		return RTPTransceiverDirectionSendonly
+	case rtpTransceiverDirectionRecvonlyStr:
+		return RTPTransceiverDirectionRecvonly
+	case rtpTransceiverDirectionInactiveStr:
+		return RTPTransceiverDirectionInactive
+	default:
+		return RTPTransceiverDirectionUnknown
+	}
+}
+
+func (t RTPTransceiverDirection) String() string {
+	switch t {
+	case RTPTransceiverDirectionSendrecv:
+		return rtpTransceiverDirectionSendrecvStr
+	case RTPTransceiverDirectionSendonly:
+		return rtpTransceiverDirectionSendonlyStr
+	case RTPTransceiverDirectionRecvonly:
+		return rtpTransceiverDirectionRecvonlyStr
+	case RTPTransceiverDirectionInactive:
+		return rtpTransceiverDirectionInactiveStr
+	default:
+		return ErrUnknownType.Error()
+	}
+}
+
+// Revers indicate the opposite direction.
+func (t RTPTransceiverDirection) Revers() RTPTransceiverDirection {
+	switch t {
+	case RTPTransceiverDirectionSendonly:
+		return RTPTransceiverDirectionRecvonly
+	case RTPTransceiverDirectionRecvonly:
+		return RTPTransceiverDirectionSendonly
+	default:
+		return t
+	}
+}
+
+func haveRTPTransceiverDirectionIntersection(
+	haystack []RTPTransceiverDirection,
+	needle []RTPTransceiverDirection,
+) bool {
+	for _, n := range needle {
+		if slices.Contains(haystack, n) {
+			return true
+		}
+	}
+
+	return false
+}