feat: Waku v2 bridge

Issue #12610

vendor/github.com/pion/rtp/codecs/opus_packet.go

@@ -0,0 +1,37 @@
+package codecs
+
+// OpusPayloader payloads Opus packets
+type OpusPayloader struct{}
+
+// Payload fragments an Opus packet across one or more byte arrays
+func (p *OpusPayloader) Payload(mtu uint16, payload []byte) [][]byte {
+	if payload == nil {
+		return [][]byte{}
+	}
+
+	out := make([]byte, len(payload))
+	copy(out, payload)
+	return [][]byte{out}
+}
+
+// OpusPacket represents the Opus header that is stored in the payload of an RTP Packet
+type OpusPacket struct {
+	Payload []byte
+
+	audioDepacketizer
+}
+
+// Unmarshal parses the passed byte slice and stores the result in the OpusPacket this method is called upon
+func (p *OpusPacket) Unmarshal(packet []byte) ([]byte, error) {
+	if packet == nil {
+		return nil, errNilPacket
+	} else if len(packet) == 0 {
+		return nil, errShortPacket
+	}
+
+	p.Payload = packet
+	return packet, nil
+}
+
+// OpusPartitionHeadChecker is obsolete
+type OpusPartitionHeadChecker struct{}