api: match WebRTC api more closely

examples/gstreamer-send/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"os"
 
 	"bufio"
@@ -15,7 +16,7 @@ import (
 func main() {
 	reader := bufio.NewReader(os.Stdin)
 	rawSd, err := reader.ReadString('\n')
-	if err != nil {
+	if err != nil && err != io.EOF {
 		panic(err)
 	}
 
@@ -27,46 +28,62 @@ func main() {
 
 	/* Everything below is the pion-WebRTC API, thanks for using it! */
 
+	// Setup the codecs you want to use.
+	// We'll use the default ones but you can also define your own
+	webrtc.RegisterDefaultCodecs()
+
 	// Create a new RTCPeerConnection
-	peerConnection, err := webrtc.New(&webrtc.RTCConfiguration{})
+	peerConnection, err := webrtc.New(webrtc.RTCConfiguration{})
 	if err != nil {
 		panic(err)
 	}
 
-	// Create a audio track
-	opusIn, err := peerConnection.AddTrack(webrtc.Opus, 48000)
-	if err != nil {
-		panic(err)
-	}
-
-	// Create a video track
-	vp8In, err := peerConnection.AddTrack(webrtc.VP8, 90000)
-	if err != nil {
-		panic(err)
-	}
-
-	// Set the remote SessionDescription
-	if err := peerConnection.SetRemoteDescription(string(sd)); err != nil {
-		panic(err)
-	}
-
-	// Sets the LocalDescription, and starts our UDP listeners
-	if err := peerConnection.CreateAnswer(); err != nil {
-		panic(err)
-	}
-
 	// Set the handler for ICE connection state
 	// This will notify you when the peer has connected/disconnected
 	peerConnection.OnICEConnectionStateChange = func(connectionState ice.ConnectionState) {
 		fmt.Printf("Connection State has changed %s \n", connectionState.String())
 	}
 
+	// Create a audio track
+	opusTrack, err := peerConnection.NewRTCTrack(webrtc.PayloadTypeOpus, "audio", "pions1")
+	if err != nil {
+		panic(err)
+	}
+	_, err = peerConnection.AddTrack(opusTrack)
+	if err != nil {
+		panic(err)
+	}
+
+	// Create a video track
+	vp8Track, err := peerConnection.NewRTCTrack(webrtc.PayloadTypeVP8, "video", "pions2")
+	if err != nil {
+		panic(err)
+	}
+	_, err = peerConnection.AddTrack(vp8Track)
+	if err != nil {
+		panic(err)
+	}
+
+	// Set the remote SessionDescription
+	offer := webrtc.RTCSessionDescription{
+		Typ: webrtc.RTCSdpTypeOffer,
+		Sdp: string(sd),
+	}
+	if err := peerConnection.SetRemoteDescription(offer); err != nil {
+		panic(err)
+	}
+
+	// Sets the LocalDescription, and starts our UDP listeners
+	answer, err := peerConnection.CreateAnswer(nil)
+	if err != nil {
+		panic(err)
+	}
+
 	// Get the LocalDescription and take it to base64 so we can paste in browser
-	localDescriptionStr := peerConnection.LocalDescription.Marshal()
-	fmt.Println(base64.StdEncoding.EncodeToString([]byte(localDescriptionStr)))
+	fmt.Println(base64.StdEncoding.EncodeToString([]byte(answer.Sdp)))
 
 	// Start pushing buffers on these tracks
-	gst.CreatePipeline(webrtc.Opus, opusIn).Start()
-	gst.CreatePipeline(webrtc.VP8, vp8In).Start()
+	gst.CreatePipeline(webrtc.Opus, opusTrack.Samples).Start()
+	gst.CreatePipeline(webrtc.VP8, vp8Track.Samples).Start()
 	select {}
 }