RTX attribute constants should be public

Author: adriancable

constants.go

@@ -39,10 +39,12 @@ const (
 
 	sdesRepairRTPStreamIDURI = "urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id"
 
-	// Attributes returned when Read() returns an RTX packet from a separate RTX stream (distinct SSRC)
-	attributeRtxPayloadType    = "rtx_payload_type"
-	attributeRtxSsrc           = "rtx_ssrc"
-	attributeRtxSequenceNumber = "rtx_sequence_number"
+	// AttributeRtxPayloadType is the interceptor attribute added when Read() returns an RTX packet containing the RTX stream payload type
+	AttributeRtxPayloadType = "rtx_payload_type"
+	// AttributeRtxSsrc is the interceptor attribute added when Read() returns an RTX packet containing the RTX stream SSRC
+	AttributeRtxSsrc = "rtx_ssrc"
+	// AttributeRtxSequenceNumber is the interceptor attribute added when Read() returns an RTX packet containing the RTX stream sequence number
+	AttributeRtxSequenceNumber = "rtx_sequence_number"
 )
 
 func defaultSrtpProtectionProfiles() []dtls.SRTPProtectionProfile {

rtpreceiver.go

@@ -454,9 +454,9 @@ func (r *RTPReceiver) receiveForRtx(ssrc SSRC, rsid string, streamInfo *intercep
 				continue
 			}
 
-			attributes.Set(attributeRtxPayloadType, b[1]&0x7F)
-			attributes.Set(attributeRtxSequenceNumber, binary.BigEndian.Uint16(b[2:4]))
-			attributes.Set(attributeRtxSsrc, binary.BigEndian.Uint32(b[8:12]))
+			attributes.Set(AttributeRtxPayloadType, b[1]&0x7F)
+			attributes.Set(AttributeRtxSequenceNumber, binary.BigEndian.Uint16(b[2:4]))
+			attributes.Set(AttributeRtxSsrc, binary.BigEndian.Uint32(b[8:12]))
 
 			b[1] = (b[1] & 0x80) | uint8(track.track.PayloadType())
 			b[2] = b[headerLength]