add TrackPCMA

track.go

@@ -66,6 +66,9 @@ func newTrackFromMediaDescription(md *psdp.MediaDescription) (Track, error) {
 		case len(md.MediaName.Formats) == 1 && md.MediaName.Formats[0] == "0":
 			return newTrackPCMUFromMediaDescription(control, rtpmapPart1, md)
 
+		case len(md.MediaName.Formats) == 1 && md.MediaName.Formats[0] == "8":
+			return newTrackPCMAFromMediaDescription(control, rtpmapPart1, md)
+
 		case strings.HasPrefix(strings.ToLower(rtpmapPart1), "mpeg4-generic/"):
 			return newTrackAACFromMediaDescription(control, payloadType, md)
 

track_pcma.go

@@ -0,0 +1,67 @@
+package gortsplib //nolint:dupl
+
+import (
+	"fmt"
+	"strings"
+
+	psdp "github.com/pion/sdp/v3"
+)
+
+// TrackPCMA is a PCMA track.
+type TrackPCMA struct {
+	trackBase
+}
+
+// NewTrackPCMA allocates a TrackPCMA.
+func NewTrackPCMA() *TrackPCMA {
+	return &TrackPCMA{}
+}
+
+func newTrackPCMAFromMediaDescription(
+	control string,
+	rtpmapPart1 string,
+	md *psdp.MediaDescription) (*TrackPCMA, error,
+) {
+	tmp := strings.Split(rtpmapPart1, "/")
+	if len(tmp) >= 3 && tmp[2] != "1" {
+		return nil, fmt.Errorf("PCMA tracks must have only one channel")
+	}
+
+	return &TrackPCMA{
+		trackBase: trackBase{
+			control: control,
+		},
+	}, nil
+}
+
+// ClockRate returns the track clock rate.
+func (t *TrackPCMA) ClockRate() int {
+	return 8000
+}
+
+func (t *TrackPCMA) clone() Track {
+	return &TrackPCMA{
+		trackBase: t.trackBase,
+	}
+}
+
+// MediaDescription returns the track media description in SDP format.
+func (t *TrackPCMA) MediaDescription() *psdp.MediaDescription {
+	return &psdp.MediaDescription{
+		MediaName: psdp.MediaName{
+			Media:   "audio",
+			Protos:  []string{"RTP", "AVP"},
+			Formats: []string{"8"},
+		},
+		Attributes: []psdp.Attribute{
+			{
+				Key:   "rtpmap",
+				Value: "8 PCMA/8000",
+			},
+			{
+				Key:   "control",
+				Value: t.control,
+			},
+		},
+	}
+}

track_pcmu.go

@@ -1,4 +1,4 @@
-package gortsplib
+package gortsplib //nolint:dupl
 
 import (
 	"fmt"

track_test.go

@@ -24,11 +24,7 @@ func TestTrackNewFromMediaDescription(t *testing.T) {
 					Formats: []string{"8"},
 				},
 			},
-			&TrackGeneric{
+			&TrackPCMA{},
-				clockRate: 8000,
-				media:     "audio",
-				formats:   []string{"8"},
-			},
 		},
 		{
 			"pcmu",