135 lines
3.2 KiB
Go
135 lines
3.2 KiB
Go
package webrtcconnection
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import (
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"git.sense-t.eu.org/ACE/ace/servers/qemuserver"
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"github.com/pion/mediadevices"
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"github.com/pion/mediadevices/pkg/codec/opus"
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"github.com/pion/mediadevices/pkg/codec/x264"
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"github.com/pion/mediadevices/pkg/driver"
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"github.com/pion/webrtc/v3"
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"github.com/sirupsen/logrus"
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)
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const DefaultStreamID = "ace-server"
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type Connection struct {
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option *Options
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api *webrtc.API
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stream mediadevices.MediaStream
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QEMU *qemuserver.Server
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}
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func New(o *Options) (*Connection, error) {
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connection := &Connection{
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option: o,
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}
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codecSelector, err := setupCodec(o.VideoBPS)
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if err != nil {
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return nil, err
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}
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me := &webrtc.MediaEngine{}
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codecSelector.Populate(me)
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connection.api = webrtc.NewAPI(webrtc.WithMediaEngine(me))
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logrus.Debug("list devices:")
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devices := driver.GetManager().Query(func(d driver.Driver) bool { return true })
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for _, device := range devices {
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logrus.Debug("\t", device.ID())
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logrus.Debug("\t", device.Info())
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logrus.Debug("\t", device.Properties())
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logrus.Debug("\t", device.Status())
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logrus.Debug("\t------")
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}
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s, err := mediadevices.GetUserMedia(mediadevices.MediaStreamConstraints{
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Video: func(mtc *mediadevices.MediaTrackConstraints) {},
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Audio: func(mtc *mediadevices.MediaTrackConstraints) {},
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Codec: codecSelector,
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})
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if err != nil {
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return nil, err
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}
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connection.stream = s
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return connection, nil
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}
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func (c *Connection) Regist(offer *webrtc.SessionDescription) (*webrtc.SessionDescription, error) {
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logrus.Debug("received offer ")
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rtc, err := c.api.NewPeerConnection(webrtc.Configuration{
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ICEServers: []webrtc.ICEServer{
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{
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URLs: c.option.STUNServers,
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},
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},
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})
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if err != nil {
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return nil, err
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}
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rtc.OnICEConnectionStateChange(func(connectionState webrtc.ICEConnectionState) {
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logrus.Debug("connection state has changed: ", connectionState.String())
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})
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rtc.OnICECandidate(func(i *webrtc.ICECandidate) {
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logrus.Debug("cadidate: ", i)
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})
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for _, track := range c.stream.GetTracks() {
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track.OnEnded(func(err error) {
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logrus.Errorf("Track (ID: %s, kind: %s) ended with error: %v", track.ID(), track.Kind().String(), err)
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})
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_, err := rtc.AddTransceiverFromTrack(track, webrtc.RTPTransceiverInit{
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Direction: webrtc.RTPTransceiverDirectionSendonly,
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})
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if err != nil {
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logrus.Error(err)
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}
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}
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rtc.OnDataChannel(c.dataChannel)
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if err := rtc.SetRemoteDescription(*offer); err != nil {
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return nil, err
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}
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logrus.Debug("offer set")
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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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if err := rtc.SetLocalDescription(answer); err != nil {
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return nil, err
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}
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logrus.Debug("answer set")
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<-webrtc.GatheringCompletePromise(rtc)
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defer logrus.Debug("regist complete")
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return rtc.LocalDescription(), nil
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}
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func setupCodec(videoBPS int) (*mediadevices.CodecSelector, error) {
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x264Prarm, err := x264.NewParams()
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if err != nil {
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return nil, err
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}
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x264Prarm.BitRate = videoBPS
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x264Prarm.Preset = x264.PresetMedium
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opusParam, err := opus.NewParams()
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if err != nil {
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return nil, err
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}
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codecSelector := mediadevices.NewCodecSelector(
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mediadevices.WithAudioEncoders(&opusParam),
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mediadevices.WithVideoEncoders(&x264Prarm),
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)
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return codecSelector, nil
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}
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