Read/Write RTP/RTCP packets with context

Control cancel/timeout by context.

examples/save-to-disk/main.go

@@ -3,6 +3,7 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"time"
@@ -23,7 +24,7 @@ func saveToDisk(i media.Writer, track *webrtc.TrackRemote) {
 	}()
 
 	for {
-		rtpPacket, err := track.ReadRTP()
+		rtpPacket, err := track.ReadRTP(context.TODO())
 		if err != nil {
 			panic(err)
 		}
@@ -96,7 +97,9 @@ func main() {
 		go func() {
 			ticker := time.NewTicker(time.Second * 3)
 			for range ticker.C {
-				errSend := peerConnection.WriteRTCP([]rtcp.Packet{&rtcp.PictureLossIndication{MediaSSRC: uint32(track.SSRC())}})
+				errSend := peerConnection.WriteRTCP(
+					context.TODO(), []rtcp.Packet{&rtcp.PictureLossIndication{MediaSSRC: uint32(track.SSRC())}},
+				)
 				if errSend != nil {
 					fmt.Println(errSend)
 				}