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360 lines
8.9 KiB
360 lines
8.9 KiB
package webrtc
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"regexp"
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"strings"
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"sync"
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"time"
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"github.com/Monibuca/engine/v3"
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"github.com/Monibuca/utils/v3"
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"github.com/Monibuca/utils/v3/codec"
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"github.com/pion/rtcp"
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"github.com/pion/rtp"
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. "github.com/pion/webrtc/v3"
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"github.com/pion/webrtc/v3/pkg/media"
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)
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var config struct {
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ICEServers []string
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PublicIP []string
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PortMin uint16
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PortMax uint16
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}
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// }{[]string{
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// "stun:stun.ekiga.net",
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// "stun:stun.ideasip.com",
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// "stun:stun.schlund.de",
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// "stun:stun.stunprotocol.org:3478",
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// "stun:stun.voiparound.com",
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// "stun:stun.voipbuster.com",
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// "stun:stun.voipstunt.com",
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// "stun:stun.voxgratia.org",
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// "stun:stun.services.mozilla.com",
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// "stun:stun.xten.com",
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// "stun:stun.softjoys.com",
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// "stun:stunserver.org",
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// "stun:stun.schlund.de",
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// "stun:stun.rixtelecom.se",
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// "stun:stun.iptel.org",
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// "stun:stun.ideasip.com",
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// "stun:stun.fwdnet.net",
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// "stun:stun.ekiga.net",
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// "stun:stun01.sipphone.com",
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// }}
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// type udpConn struct {
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// conn *net.UDPConn
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// port int
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// }
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var (
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playWaitList WaitList
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reg_level = regexp.MustCompile("profile-level-id=(4.+f)")
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api *API
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)
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type WaitList struct {
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m map[string]*WebRTC
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l sync.Mutex
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}
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func (wl *WaitList) Set(k string, v *WebRTC) {
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wl.l.Lock()
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defer wl.l.Unlock()
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if wl.m == nil {
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wl.m = make(map[string]*WebRTC)
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}
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wl.m[k] = v
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}
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func (wl *WaitList) Get(k string) *WebRTC {
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wl.l.Lock()
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defer wl.l.Unlock()
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defer delete(wl.m, k)
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return wl.m[k]
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}
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func init() {
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engine.InstallPlugin(&engine.PluginConfig{
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Config: &config,
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Name: "WebRTC",
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Run: run,
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})
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}
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type WebRTC struct {
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engine.Publisher
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*PeerConnection
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}
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func (rtc *WebRTC) Publish(streamPath string) bool {
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// rtc.m.RegisterCodec(NewRTPCodec(RTPCodecTypeVideo,
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// H264,
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// 90000,
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// 0,
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// "level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f",
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// DefaultPayloadTypeH264,
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// new(codec.H264)))
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// rtc.m.RegisterCodec(RTPCodecParameters{
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// RTPCodecCapability: RTPCodecCapability{MimeType: "video/h264", ClockRate: 90000, Channels: 0, SDPFmtpLine: "", RTCPFeedback: nil},
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// PayloadType: 96,
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// }, RTPCodecTypeVideo);
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//m.RegisterCodec(NewRTPPCMUCodec(DefaultPayloadTypePCMU, 8000))
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// if !strings.HasPrefix(rtc.RemoteAddr, "127.0.0.1") && !strings.HasPrefix(rtc.RemoteAddr, "[::1]") {
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// rtc.s.SetNAT1To1IPs(config.PublicIP, ICECandidateTypeHost)
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// }
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peerConnection, err := api.NewPeerConnection(Configuration{
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// ICEServers: []ICEServer{
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// {
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// URLs: config.ICEServers,
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// },
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// },
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})
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if err != nil {
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utils.Println(err)
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return false
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}
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if _, err = peerConnection.AddTransceiverFromKind(RTPCodecTypeVideo); err != nil {
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if err != nil {
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utils.Println(err)
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return false
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}
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}
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if err != nil {
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return false
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}
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peerConnection.OnICEConnectionStateChange(func(connectionState ICEConnectionState) {
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utils.Printf("%s Connection State has changed %s ", streamPath, connectionState.String())
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switch connectionState {
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case ICEConnectionStateDisconnected, ICEConnectionStateFailed:
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if rtc.Stream != nil {
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rtc.Stream.Close()
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}
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}
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})
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rtc.PeerConnection = peerConnection
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if rtc.Publish(streamPath) {
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//f, _ := os.OpenFile("resource/live/rtc.h264", os.O_TRUNC|os.O_WRONLY, 0666)
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rtc.Stream.Type = "WebRTC"
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peerConnection.OnTrack(func(track *TrackRemote, receiver *RTPReceiver) {
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defer rtc.Stream.Close()
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go func() {
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ticker := time.NewTicker(time.Second * 2)
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select {
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case <-ticker.C:
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if rtcpErr := peerConnection.WriteRTCP([]rtcp.Packet{&rtcp.PictureLossIndication{MediaSSRC: uint32(track.SSRC())}}); rtcpErr != nil {
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fmt.Println(rtcpErr)
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}
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case <-rtc.Done():
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return
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}
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}()
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var etrack engine.Track
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if track.Kind() == RTPCodecTypeAudio {
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//TODO: 判断音频格式
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etrack = rtc.AudioTracks["pcma"]
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} else {
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etrack = rtc.VideoTracks["h264"]
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}
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var pack rtp.Packet
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b := make([]byte, 1460)
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for {
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i, _, err := track.Read(b)
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if err != nil {
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return
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}
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if err = pack.Unmarshal(b[:i]); err != nil {
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return
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}
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etrack.Push(pack.Timestamp, pack.Payload)
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}
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})
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} else {
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return false
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}
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return true
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}
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func (rtc *WebRTC) GetAnswer() ([]byte, error) {
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// Sets the LocalDescription, and starts our UDP listeners
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answer, err := rtc.CreateAnswer(nil)
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if err != nil {
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return nil, err
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}
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gatherComplete := GatheringCompletePromise(rtc.PeerConnection)
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if err := rtc.SetLocalDescription(answer); err != nil {
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utils.Println(err)
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return nil, err
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}
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<-gatherComplete
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if bytes, err := json.Marshal(rtc.LocalDescription()); err != nil {
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utils.Println(err)
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return bytes, err
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} else {
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return bytes, nil
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}
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}
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func run() {
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var m MediaEngine
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var s SettingEngine
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if config.PortMin > 0 && config.PortMax > 0 {
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s.SetEphemeralUDPPortRange(config.PortMin, config.PortMax)
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}
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m.RegisterDefaultCodecs()
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api = NewAPI(WithMediaEngine(&m), WithSettingEngine(s))
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http.HandleFunc("/webrtc/play", func(w http.ResponseWriter, r *http.Request) {
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utils.CORS(w, r)
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w.Header().Set("Content-Type", "application/json")
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streamPath := r.URL.Query().Get("streamPath")
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var offer SessionDescription
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var rtc WebRTC
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sub := engine.Subscriber{
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ID: r.RemoteAddr,
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Type: "WebRTC",
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}
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bytes, err := ioutil.ReadAll(r.Body)
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defer func() {
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if err != nil {
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utils.Println(err)
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fmt.Fprintf(w, `{"errmsg":"%s"}`, err)
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return
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}
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}()
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if err != nil {
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return
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}
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if err = json.Unmarshal(bytes, &offer); err != nil {
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return
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}
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if err = sub.Subscribe(streamPath); err != nil {
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return
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}
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if rtc.PeerConnection, err = api.NewPeerConnection(Configuration{}); err != nil {
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return
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}
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rtc.OnICECandidate(func(ice *ICECandidate) {
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if ice != nil {
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utils.Println(ice.ToJSON().Candidate)
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}
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})
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if err = rtc.SetRemoteDescription(offer); err != nil {
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return
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}
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vt := sub.GetVideoTrack("h264")
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if vt != nil {
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pli := "42001f"
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pli = fmt.Sprintf("%x", vt.SPS[1:4])
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if !strings.Contains(offer.SDP, pli) {
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pli = reg_level.FindAllStringSubmatch(offer.SDP, -1)[0][1]
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}
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var videoTrack *TrackLocalStaticSample
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if videoTrack, err = NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeH264, SDPFmtpLine: "level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=" + pli}, "video", "m7s"); err != nil {
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return
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}
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if _, err = rtc.AddTrack(videoTrack); err != nil {
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return
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}
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var lastTimeStampV uint32
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sub.OnVideo = func(pack engine.VideoPack) {
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var s uint32
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if lastTimeStampV > 0 {
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s = pack.Timestamp - lastTimeStampV
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}
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lastTimeStampV = pack.Timestamp
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if pack.NalType == codec.NALU_IDR_Picture {
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videoTrack.WriteSample(media.Sample{
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Data: vt.SPS,
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})
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videoTrack.WriteSample(media.Sample{
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Data: vt.PPS,
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})
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}
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videoTrack.WriteSample(media.Sample{
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Data: pack.Payload,
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Duration: time.Millisecond * time.Duration(s),
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})
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}
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}
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at := sub.GetAudioTrack("pcma", "pcmu")
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if at != nil {
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var audioTrack *TrackLocalStaticSample
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audioMimeType := MimeTypePCMA
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if at.SoundFormat == 8 {
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audioMimeType = MimeTypePCMU
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}
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if audioTrack, err = NewTrackLocalStaticSample(RTPCodecCapability{audioMimeType, 8000, 0, "", nil}, "audio", "m7s"); err != nil {
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return
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}
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if _, err = rtc.AddTrack(audioTrack); err != nil {
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return
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}
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var lastTimeStampA uint32
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sub.OnAudio = func(pack engine.AudioPack) {
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var s uint32
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if lastTimeStampA > 0 {
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s = pack.Timestamp - lastTimeStampA
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}
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lastTimeStampA = pack.Timestamp
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audioTrack.WriteSample(media.Sample{
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Data: pack.Payload, Duration: time.Millisecond * time.Duration(s),
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})
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}
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}
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if bytes, err := rtc.GetAnswer(); err == nil {
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w.Write(bytes)
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rtc.OnICEConnectionStateChange(func(connectionState ICEConnectionState) {
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utils.Printf("%s Connection State has changed %s ", streamPath, connectionState.String())
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switch connectionState {
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case ICEConnectionStateDisconnected, ICEConnectionStateFailed:
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sub.Close()
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rtc.PeerConnection.Close()
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case ICEConnectionStateConnected:
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if at != nil {
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go sub.PlayAudio(sub.Context, at)
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}
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if vt != nil {
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go sub.PlayVideo(sub.Context, vt)
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}
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}
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})
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} else {
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return
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}
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})
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http.HandleFunc("/webrtc/publish", func(w http.ResponseWriter, r *http.Request) {
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streamPath := r.URL.Query().Get("streamPath")
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offer := SessionDescription{}
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bytes, err := ioutil.ReadAll(r.Body)
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err = json.Unmarshal(bytes, &offer)
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if err != nil {
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utils.Println(err)
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return
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}
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rtc := new(WebRTC)
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if rtc.Publish(streamPath) {
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if err := rtc.SetRemoteDescription(offer); err != nil {
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utils.Println(err)
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return
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}
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if bytes, err = rtc.GetAnswer(); err == nil {
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w.Write(bytes)
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} else {
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utils.Println(err)
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w.Write([]byte(err.Error()))
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return
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}
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} else {
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w.Write([]byte("bad name"))
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}
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})
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}
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