|
| 1 | +package simulation |
| 2 | + |
| 3 | +import ( |
| 4 | + "github.com/pion/interceptor" |
| 5 | + "github.com/pion/interceptor/pkg/packetdump" |
| 6 | + "github.com/pion/interceptor/pkg/rfc8888" |
| 7 | + "github.com/pion/interceptor/pkg/rtpfb" |
| 8 | + "github.com/pion/interceptor/pkg/twcc" |
| 9 | + "github.com/pion/logging" |
| 10 | + "github.com/pion/transport/v3/vnet" |
| 11 | + "github.com/pion/webrtc/v4" |
| 12 | +) |
| 13 | + |
| 14 | +type option func(*peer) error |
| 15 | + |
| 16 | +func setVNet(vnet *vnet.Net, publicIPs []string) option { |
| 17 | + return func(p *peer) error { |
| 18 | + p.settingEngine.SetNet(vnet) |
| 19 | + p.settingEngine.SetNAT1To1IPs(publicIPs, webrtc.ICECandidateTypeHost) |
| 20 | + return nil |
| 21 | + } |
| 22 | +} |
| 23 | + |
| 24 | +func onRemoteTrack(handler func(*webrtc.TrackRemote)) option { |
| 25 | + return func(p *peer) error { |
| 26 | + p.onRemoteTrack = handler |
| 27 | + return nil |
| 28 | + } |
| 29 | +} |
| 30 | + |
| 31 | +func onConnected(handler func()) option { |
| 32 | + return func(p *peer) error { |
| 33 | + p.onConnected = handler |
| 34 | + return nil |
| 35 | + } |
| 36 | +} |
| 37 | + |
| 38 | +func registerDefaultCodecs() option { |
| 39 | + return func(p *peer) error { |
| 40 | + return p.mediaEngine.RegisterDefaultCodecs() |
| 41 | + } |
| 42 | +} |
| 43 | + |
| 44 | +func registerPacketLogger(vantagePoint string) option { |
| 45 | + return func(p *peer) error { |
| 46 | + ipl := &packetLogger{vantagePoint: vantagePoint, direction: "in"} |
| 47 | + rd, err := packetdump.NewReceiverInterceptor(packetdump.PacketLog(ipl)) |
| 48 | + if err != nil { |
| 49 | + return err |
| 50 | + } |
| 51 | + opl := &packetLogger{vantagePoint: vantagePoint, direction: "out"} |
| 52 | + sd, err := packetdump.NewSenderInterceptor(packetdump.PacketLog(opl)) |
| 53 | + if err != nil { |
| 54 | + return err |
| 55 | + } |
| 56 | + p.interceptorRegistry.Add(rd) |
| 57 | + p.interceptorRegistry.Add(sd) |
| 58 | + return nil |
| 59 | + } |
| 60 | +} |
| 61 | + |
| 62 | +func registerRTPFB() option { |
| 63 | + return func(p *peer) error { |
| 64 | + rtpfb, err := rtpfb.NewInterceptor() |
| 65 | + if err != nil { |
| 66 | + return err |
| 67 | + } |
| 68 | + p.interceptorRegistry.Add(rtpfb) |
| 69 | + return nil |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +func registerTWCC() option { |
| 74 | + return func(p *peer) error { |
| 75 | + twcc, err := twcc.NewSenderInterceptor() |
| 76 | + if err != nil { |
| 77 | + return err |
| 78 | + } |
| 79 | + p.interceptorRegistry.Add(twcc) |
| 80 | + return nil |
| 81 | + } |
| 82 | +} |
| 83 | + |
| 84 | +func registerTWCCHeaderExtension() option { |
| 85 | + return func(p *peer) error { |
| 86 | + twccHdrExt, err := twcc.NewHeaderExtensionInterceptor() |
| 87 | + if err != nil { |
| 88 | + return err |
| 89 | + } |
| 90 | + p.interceptorRegistry.Add(twccHdrExt) |
| 91 | + return nil |
| 92 | + } |
| 93 | +} |
| 94 | + |
| 95 | +func registerCCFB() option { |
| 96 | + return func(p *peer) error { |
| 97 | + ccfb, err := rfc8888.NewSenderInterceptor() |
| 98 | + if err != nil { |
| 99 | + return err |
| 100 | + } |
| 101 | + p.interceptorRegistry.Add(ccfb) |
| 102 | + return nil |
| 103 | + } |
| 104 | +} |
| 105 | + |
| 106 | +type peer struct { |
| 107 | + logger logging.LeveledLogger |
| 108 | + pc *webrtc.PeerConnection |
| 109 | + |
| 110 | + settingEngine *webrtc.SettingEngine |
| 111 | + mediaEngine *webrtc.MediaEngine |
| 112 | + interceptorRegistry *interceptor.Registry |
| 113 | + |
| 114 | + onRemoteTrack func(*webrtc.TrackRemote) |
| 115 | + onConnected func() |
| 116 | +} |
| 117 | + |
| 118 | +func newPeer(opts ...option) (*peer, error) { |
| 119 | + p := &peer{ |
| 120 | + logger: logging.NewDefaultLoggerFactory().NewLogger("bwe_test_peer"), |
| 121 | + pc: nil, |
| 122 | + settingEngine: &webrtc.SettingEngine{}, |
| 123 | + mediaEngine: &webrtc.MediaEngine{}, |
| 124 | + interceptorRegistry: &interceptor.Registry{}, |
| 125 | + onRemoteTrack: nil, |
| 126 | + onConnected: nil, |
| 127 | + } |
| 128 | + for _, opt := range opts { |
| 129 | + if err := opt(p); err != nil { |
| 130 | + return nil, err |
| 131 | + } |
| 132 | + } |
| 133 | + pc, err := webrtc.NewAPI( |
| 134 | + webrtc.WithMediaEngine(p.mediaEngine), |
| 135 | + webrtc.WithSettingEngine(*p.settingEngine), |
| 136 | + webrtc.WithInterceptorRegistry(p.interceptorRegistry), |
| 137 | + ).NewPeerConnection(webrtc.Configuration{ |
| 138 | + ICEServers: []webrtc.ICEServer{ |
| 139 | + { |
| 140 | + URLs: []string{"stun:stun.l.google.com:19302"}, |
| 141 | + }, |
| 142 | + }, |
| 143 | + }) |
| 144 | + if err != nil { |
| 145 | + return nil, err |
| 146 | + } |
| 147 | + |
| 148 | + pc.OnNegotiationNeeded(p.onNegotiationNeeded) |
| 149 | + pc.OnSignalingStateChange(p.onSignalingStateChange) |
| 150 | + pc.OnICECandidate(p.onICECandidate) |
| 151 | + pc.OnICEGatheringStateChange(p.onICEGatheringStateChange) |
| 152 | + pc.OnICEConnectionStateChange(p.onICEConnectionStateChange) |
| 153 | + pc.OnConnectionStateChange(p.onConnectionStateChange) |
| 154 | + pc.OnDataChannel(p.onDataChannel) |
| 155 | + pc.OnTrack(p.onTrack) |
| 156 | + |
| 157 | + p.pc = pc |
| 158 | + return p, nil |
| 159 | +} |
| 160 | + |
| 161 | +// Callbacks |
| 162 | + |
| 163 | +func (p *peer) onNegotiationNeeded() { |
| 164 | + p.logger.Infof("negotiation needed") |
| 165 | +} |
| 166 | + |
| 167 | +func (p *peer) onSignalingStateChange(s webrtc.SignalingState) { |
| 168 | + p.logger.Infof("new signaling state: %v", s) |
| 169 | +} |
| 170 | + |
| 171 | +func (p *peer) onICECandidate(c *webrtc.ICECandidate) { |
| 172 | + p.logger.Infof("got new ICE candidate: %v", c) |
| 173 | +} |
| 174 | + |
| 175 | +func (p *peer) onICEGatheringStateChange(s webrtc.ICEGatheringState) { |
| 176 | + p.logger.Infof("new ICE gathering state: %v", s) |
| 177 | +} |
| 178 | + |
| 179 | +func (p *peer) onICEConnectionStateChange(s webrtc.ICEConnectionState) { |
| 180 | + p.logger.Infof("new ICE connection state: %v", s) |
| 181 | +} |
| 182 | + |
| 183 | +func (p *peer) onConnectionStateChange(s webrtc.PeerConnectionState) { |
| 184 | + p.logger.Infof("new connection state: %v", s) |
| 185 | + if s == webrtc.PeerConnectionStateConnected && p.onConnected != nil { |
| 186 | + p.onConnected() |
| 187 | + } |
| 188 | +} |
| 189 | + |
| 190 | +func (p *peer) onDataChannel(dc *webrtc.DataChannel) { |
| 191 | + p.logger.Infof("got new data channel: id=%v, label=%v", dc.ID(), dc.Label()) |
| 192 | +} |
| 193 | + |
| 194 | +func (p *peer) onTrack(track *webrtc.TrackRemote, _ *webrtc.RTPReceiver) { |
| 195 | + if p.onRemoteTrack != nil { |
| 196 | + p.onRemoteTrack(track) |
| 197 | + } |
| 198 | +} |
| 199 | + |
| 200 | +// Signaling helpers |
| 201 | + |
| 202 | +func (p *peer) createOffer() (*webrtc.SessionDescription, error) { |
| 203 | + offer, err := p.pc.CreateOffer(nil) |
| 204 | + if err != nil { |
| 205 | + return nil, err |
| 206 | + } |
| 207 | + gc := webrtc.GatheringCompletePromise(p.pc) |
| 208 | + if err = p.pc.SetLocalDescription(offer); err != nil { |
| 209 | + return nil, err |
| 210 | + } |
| 211 | + <-gc |
| 212 | + return p.pc.LocalDescription(), nil |
| 213 | +} |
| 214 | + |
| 215 | +func (p *peer) createAnswer() (*webrtc.SessionDescription, error) { |
| 216 | + answer, err := p.pc.CreateAnswer(nil) |
| 217 | + if err != nil { |
| 218 | + return nil, err |
| 219 | + } |
| 220 | + gc := webrtc.GatheringCompletePromise(p.pc) |
| 221 | + if err = p.pc.SetLocalDescription(answer); err != nil { |
| 222 | + return nil, err |
| 223 | + } |
| 224 | + <-gc |
| 225 | + return p.pc.LocalDescription(), nil |
| 226 | +} |
| 227 | + |
| 228 | +func (p *peer) setRemoteDescription(description *webrtc.SessionDescription) error { |
| 229 | + return p.pc.SetRemoteDescription(*description) |
| 230 | +} |
| 231 | + |
| 232 | +// Track management |
| 233 | + |
| 234 | +func (p *peer) addLocalTrack() (*webrtc.TrackLocalStaticSample, error) { |
| 235 | + track, err := webrtc.NewTrackLocalStaticSample(webrtc.RTPCodecCapability{ |
| 236 | + MimeType: webrtc.MimeTypeH264, |
| 237 | + ClockRate: 0, |
| 238 | + Channels: 0, |
| 239 | + SDPFmtpLine: "", |
| 240 | + RTCPFeedback: []webrtc.RTCPFeedback{}, |
| 241 | + }, "video", "pion") |
| 242 | + if err != nil { |
| 243 | + return nil, err |
| 244 | + } |
| 245 | + s, err := p.pc.AddTrack(track) |
| 246 | + if err != nil { |
| 247 | + return nil, err |
| 248 | + } |
| 249 | + go p.readRTCP(s) |
| 250 | + return track, err |
| 251 | +} |
| 252 | + |
| 253 | +func (p *peer) addRemoteTrack() error { |
| 254 | + _, err := p.pc.AddTransceiverFromKind(webrtc.RTPCodecTypeVideo) |
| 255 | + return err |
| 256 | +} |
| 257 | + |
| 258 | +func (p *peer) readRTCP(r *webrtc.RTPSender) { |
| 259 | + for { |
| 260 | + _, _, err := r.ReadRTCP() |
| 261 | + if err != nil { |
| 262 | + return |
| 263 | + } |
| 264 | + } |
| 265 | +} |
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