Add rtp-send example

examples/rtp-send/README.md

@@ -0,0 +1,23 @@
+## Instructions
+
+### Download rtp-send example
+
+```
+go get github.com/pion/mediadevices/examples/rtp-send
+```
+
+### Listen RTP
+
+Install GStreamer and run:
+```
+gst-launch-1.0 udpsrc port=5000 ! rtpvp8depay ! vp8dec ! videoconvert ! autovideosink
+```
+
+### Run rtp-send
+
+Run `rtp-send localhost:5000`
+
+A video should start playing in your GStreamer window.
+It's not WebRTC, but pure RTP.
+
+Congrats, you have used pion-MediaDevices! Now start building something cool

examples/rtp-send/main.go

@@ -0,0 +1,114 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+
+	"github.com/pion/mediadevices"
+	_ "github.com/pion/mediadevices/pkg/codec/openh264" // This is required to register h264 video encoder
+	_ "github.com/pion/mediadevices/pkg/codec/vpx"      // This is required to register VP8/VP9 video encoder
+	"github.com/pion/mediadevices/pkg/frame"
+	"github.com/pion/rtp"
+	"github.com/pion/webrtc/v2"
+	"github.com/pion/webrtc/v2/pkg/media"
+)
+
+const (
+	videoCodecName = webrtc.VP8
+	mtu            = 1000
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Printf("usage: %s host:port\n", os.Args[0])
+		return
+	}
+
+	md := mediadevices.NewMediaDevicesFromCodecs(
+		map[webrtc.RTPCodecType][]*webrtc.RTPCodec{
+			webrtc.RTPCodecTypeVideo: []*webrtc.RTPCodec{
+				webrtc.NewRTPVP8Codec(100, 90000),
+			},
+		},
+		mediadevices.WithTrackGenerator(
+			func(_ uint8, _ uint32, id, _ string, codec *webrtc.RTPCodec) (
+				mediadevices.LocalTrack, error,
+			) {
+				return newTrack(codec, id, os.Args[1]), nil
+			},
+		),
+	)
+
+	_, err := md.GetUserMedia(mediadevices.MediaStreamConstraints{
+		Video: func(c *mediadevices.MediaTrackConstraints) {
+			c.CodecName = videoCodecName
+			c.FrameFormat = frame.FormatYUY2
+			c.Enabled = true
+			c.Width = 640
+			c.Height = 480
+			c.BitRate = 100000 // 100kbps
+		},
+	})
+	if err != nil {
+		panic(err)
+	}
+
+	select {}
+}
+
+type track struct {
+	codec      *webrtc.RTPCodec
+	packetizer rtp.Packetizer
+	id         string
+	conn       net.Conn
+}
+
+func newTrack(codec *webrtc.RTPCodec, id, dest string) *track {
+	addr, err := net.ResolveUDPAddr("udp", dest)
+	if err != nil {
+		panic(err)
+	}
+	conn, err := net.DialUDP("udp", nil, addr)
+	if err != nil {
+		panic(err)
+	}
+	return &track{
+		codec: codec,
+		packetizer: rtp.NewPacketizer(
+			mtu,
+			codec.PayloadType,
+			1,
+			codec.Payloader,
+			rtp.NewRandomSequencer(),
+			codec.ClockRate,
+		),
+		id:   id,
+		conn: conn,
+	}
+}
+
+func (t *track) WriteSample(s media.Sample) error {
+	buf := make([]byte, mtu)
+	pkts := t.packetizer.Packetize(s.Data, s.Samples)
+	for _, p := range pkts {
+		n, err := p.MarshalTo(buf)
+		if err != nil {
+			panic(err)
+		}
+		_, _ = t.conn.Write(buf[:n])
+	}
+	return nil
+}
+
+func (t *track) Codec() *webrtc.RTPCodec {
+	return t.codec
+}
+
+func (t *track) ID() string {
+	return t.id
+}
+
+func (t *track) Kind() webrtc.RTPCodecType {
+	return t.codec.Type
+}

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/blackjack/webcam v0.0.0-20191123110216-08fa32efcb67
 	github.com/faiface/beep v1.0.2
 	github.com/jfreymuth/pulse v0.0.0-20200118113426-7cf5f487291e
+	github.com/pion/rtp v1.2.0
 	github.com/pion/webrtc/v2 v2.1.19-0.20200106051345-726a16faa60d
 	github.com/satori/go.uuid v1.2.0
 	gopkg.in/hraban/opus.v2 v2.0.0-20191117073431-57179dff69a6