add TrackPCMU

track_pcmu.go

@@ -0,0 +1,79 @@
+package gortsplib
+
+import (
+	"fmt"
+	"strings"
+
+	psdp "github.com/pion/sdp/v3"
+
+	"github.com/aler9/gortsplib/pkg/base"
+)
+
+// TrackPCMU is a PCMU track.
+type TrackPCMU struct {
+	control string
+}
+
+// NewTrackPCMU allocates a TrackPCMU.
+func NewTrackPCMU() *TrackPCMU {
+	return &TrackPCMU{}
+}
+
+func newTrackPCMUFromMediaDescription(rtpmapPart1 string,
+	md *psdp.MediaDescription) (*TrackPCMU, error,
+) {
+	control := trackFindControl(md)
+
+	tmp := strings.Split(rtpmapPart1, "/")
+	if len(tmp) >= 3 && tmp[2] != "1" {
+		return nil, fmt.Errorf("PCMU tracks must have only one channel")
+	}
+
+	return &TrackPCMU{
+		control: control,
+	}, nil
+}
+
+// ClockRate returns the track clock rate.
+func (t *TrackPCMU) ClockRate() int {
+	return 8000
+}
+
+func (t *TrackPCMU) clone() Track {
+	return &TrackPCMU{}
+}
+
+// GetControl returns the track control.
+func (t *TrackPCMU) GetControl() string {
+	return t.control
+}
+
+// SetControl sets the track control.
+func (t *TrackPCMU) SetControl(c string) {
+	t.control = c
+}
+
+func (t *TrackPCMU) url(contentBase *base.URL) (*base.URL, error) {
+	return trackURL(t, contentBase)
+}
+
+// MediaDescription returns the media description in SDP format.
+func (t *TrackPCMU) MediaDescription() *psdp.MediaDescription {
+	return &psdp.MediaDescription{
+		MediaName: psdp.MediaName{
+			Media:   "audio",
+			Protos:  []string{"RTP", "AVP"},
+			Formats: []string{"0"},
+		},
+		Attributes: []psdp.Attribute{
+			{
+				Key:   "rtpmap",
+				Value: "0 PCMU/8000",
+			},
+			{
+				Key:   "control",
+				Value: t.control,
+			},
+		},
+	}
+}