diff --git a/.gitignore b/.gitignore index a1c2a23..b87d357 100644 --- a/.gitignore +++ b/.gitignore @@ -21,3 +21,6 @@ # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml hs_err_pid* +bin/ +objs +.idea diff --git a/.vscode/launch.json b/.vscode/launch.json new file mode 100644 index 0000000..bba5b23 --- /dev/null +++ b/.vscode/launch.json @@ -0,0 +1,17 @@ +{ + // 使用 IntelliSense 了解相关属性。 + // 悬停以查看现有属性的描述。 + // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387 + "version": "0.2.0", + "configurations": [ + { + "name": "Launch Package", + "type": "go", + "request": "launch", + "mode": "auto", + "program": "${workspaceFolder}/main", + "env": {}, + "args": ["-sip-port", "5080", "-media-addr", "127.0.0.1:1985"] + } + ] +} \ No newline at end of file diff --git a/LICENSE b/LICENSE index 6db1943..bc8e0ee 100644 --- a/LICENSE +++ b/LICENSE @@ -1,6 +1,6 @@ MIT License -Copyright (c) 2022 ossrs +Copyright (c) 2024 Haibo Chen Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..4da9869 --- /dev/null +++ b/Makefile @@ -0,0 +1,22 @@ +GOCMD=go +GOBUILD=$(GOCMD) build +BINARY_NAME=bin/srs-sip +MAIN_PATH=main/main.go + +default: build + +build: + $(GOBUILD) -o $(BINARY_NAME) $(MAIN_PATH) + +clean: + rm -f $(BINARY_NAME) + +run: + $(GOBUILD) -o $(BINARY_NAME) $(MAIN_PATH) + ./$(BINARY_NAME) + +install: + $(GOBUILD) -o $(BINARY_NAME) $(MAIN_PATH) + mv $(BINARY_NAME) /usr/local/bin + +.PHONY: clean diff --git a/README.md b/README.md new file mode 100644 index 0000000..373cfe2 --- /dev/null +++ b/README.md @@ -0,0 +1,74 @@ +# SRS-SIP + +## Usage + +Pre-requisites: +- Go 1.20+ is installed +- GOPATH/bin is in your PATH + +Then run +``` +git clone https://github.com/ossrs/srs-sip +cd srs-sip +./bootstrap.sh +mage +``` + +If you are on a Unix-like system, you can also run the following command. +``` +make +``` + +Run the program: + +``` +./bin/srs-sip -sip-port 5060 -media-addr 127.0.0.1:1985 -api-port 2020 -http-server-port 8888 +``` + +- `sip-port` : the SIP port, this program listen on, for device register with gb28181 +- `media-addr` : the API address for SRS, typically on port 1985, used to send HTTP requests to "/gb/v1/publish" +- `api-port`: The API server port, used to send HTTP requests, for example "/srs-sip/v1/channels" +- `http-server-port`: The demo web server. + +Access http://localhost:8888 in web browser. + +## Sequence + +1. 注册流程 +```mermaid +sequenceDiagram + Device ->> SRS-SIP : 1. Register + SRS-SIP ->> Device : 2. 200 OK +``` + +暂时没有实现鉴权功能，敬请期待。 + +2. 播放视频流程 +Player、SRS-SIP、SRS Server和GB28181 Device的交互图如下： + +```mermaid +sequenceDiagram + Player ->> SRS-SIP : 1. Play Request(with id) + SRS-SIP ->> SRS : 2. Publish Request(with ssrc and id) + SRS ->> SRS-SIP : 3. Response(with port) + SRS-SIP ->> Device : 4. Invite(with port) + Device ->> SRS-SIP : 5. 200 OK + SRS-SIP ->> Player : 6. 200 OK(with url) + Device -->> SRS : Media Stream + Player ->> SRS : 7. Play + SRS -->> Player : Media Stream + Player ->> SRS-SIP : 8. Stop Request + SRS-SIP ->> SRS : 9. Unpublish Request + SRS-SIP ->> Device : 10. Bye +``` + +1. 通过SRS-SIP提供的API接口`/srs-sip/v1/invite`，Player主动发起播放请求，携带设备的通道ID +2. SRS-SIP向SRS发起推流请求，携带SSRC和ID，SSRC是设备推流时RTP里的字段 +3. SRS响应推流请求，并返回收流端口。目前SRS仅支持TCP单端口模式，在配置文件`stream_caster.listen`中配置 +4. SRS-SIP通过GB28181协议向设备发起`Invite`请求，携带SRS的收流端口及SSRC +5. 设备响应成功 +6. SRS-SIP响应成功，携带URL，用于播放 +7. Player通过返回的URL进行拉流播放 +8. Player停止播放 +9. SRS-SIP通知SRS停止收流 +10. SRS-SIP通过设备停止推流 diff --git a/bootstrap.sh b/bootstrap.sh new file mode 100755 index 0000000..3c0d240 --- /dev/null +++ b/bootstrap.sh @@ -0,0 +1,49 @@ +add_gopath_to_path() { + GOPATH=$(go env GOPATH) + # Check if GOPATH is set + if [ -z "$GOPATH" ]; then + echo "GOPATH is not set." + return 1 + fi + + # Check if $GOPATH/bin is already in ~/.bashrc + if grep -q "$GOPATH/bin" ~/.bashrc; then + echo "$GOPATH/bin is already in PATH." + return 0 + fi + + # Add $GOPATH/bin to PATH + echo "export PATH=\$PATH:$GOPATH/bin" >> ~/.bashrc + source ~/.bashrc + + echo "$GOPATH/bin has been added to PATH." +} + + +if ! command -v mage &> /dev/null +then + pushd /tmp + + OS_IS_LINUX=$(uname -s |grep -q Linux && echo YES) + if [ "$OS_IS_LINUX" == "YES" ]; then + add_gopath_to_path + if [ $? -eq 1 ]; then + echo "error: Failed to add $GOPATH/bin to PATH." + exit 1 + fi + fi + + git clone https://github.com/magefile/mage + cd mage + go run bootstrap.go + rm -rf /tmp/mage + popd +fi + +if ! command -v mage &> /dev/null +then + echo "error: Ensure `go env GOPATH`/bin is in your \$PATH" + exit 1 +fi + +go mod download \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..0ecff5b --- /dev/null +++ b/go.mod @@ -0,0 +1,41 @@ +module github.com/ossrs/srs-sip + +go 1.20 + +require ( + github.com/gorilla/handlers v1.5.2 + github.com/gorilla/mux v1.8.1 + github.com/magefile/mage v1.15.0 + github.com/ossrs/go-oryx-lib v0.0.9 + github.com/ossrs/srs-bench v0.0.0-20230906232735-aa029b492d0f + github.com/rs/zerolog v1.32.0 + golang.org/x/net v0.10.0 +) + +require ( + github.com/emiago/sipgo v0.22.1 // indirect + github.com/felixge/httpsnoop v1.0.3 // indirect + github.com/ghettovoice/gosip v0.0.0-20220929080231-de8ba881be83 // indirect + github.com/gobwas/httphead v0.1.0 // indirect + github.com/gobwas/pool v0.2.1 // indirect + github.com/gobwas/ws v1.3.2 // indirect + github.com/google/uuid v1.6.0 // indirect + github.com/icholy/digest v0.1.22 // indirect + github.com/kr/text v0.2.0 // indirect + github.com/mattn/go-colorable v0.1.13 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect + github.com/pion/randutil v0.1.0 // indirect + github.com/pion/rtp v1.7.13 // indirect + github.com/pion/webrtc/v3 v3.2.9 // indirect + github.com/satori/go.uuid v1.2.1-0.20181028125025-b2ce2384e17b // indirect + github.com/sirupsen/logrus v1.9.3 // indirect + github.com/tevino/abool v0.0.0-20170917061928-9b9efcf221b5 // indirect + github.com/x-cray/logrus-prefixed-formatter v0.5.2 // indirect + github.com/yapingcat/gomedia/codec v0.0.0-20220617074658-94762898dc25 // indirect + github.com/yapingcat/gomedia/mpeg2 v0.0.0-20220617074658-94762898dc25 // indirect + golang.org/x/crypto v0.9.0 // indirect + golang.org/x/sys v0.19.0 // indirect + golang.org/x/term v0.8.0 // indirect + golang.org/x/text v0.9.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 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"path/filepath" + "runtime" + + "github.com/magefile/mage/sh" +) + +var Default = Build + +func Build() error { + path := "bin" + if err := os.MkdirAll(path, 0755); err != nil { + return err + } + + name := "srs-sip" + if runtime.GOOS == "windows" { + name += ".exe" + } + name = filepath.Join(path, name) + + if err := sh.Run("go", "build", "-o", name, "main/main.go"); err != nil { + return err + } + + name = "srs-sip-tools" + if runtime.GOOS == "windows" { + name += ".exe" + } + name = filepath.Join(path, name) + + if err := sh.Run("go", "build", "-o", name, "tools/main.go"); err != nil { + return err + } + + fmt.Println("build done") + return nil +} + +func Clean() { + os.RemoveAll("bin") + fmt.Println("clean done") +} diff --git a/main/main.go b/main/main.go new file mode 100644 index 0000000..9bc5524 --- /dev/null +++ b/main/main.go @@ -0,0 +1,85 @@ +package main + +import ( + "context" + "net/http" + "os" + "os/signal" + "path" + "strconv" + "syscall" + "time" + + "github.com/ossrs/go-oryx-lib/logger" + "github.com/ossrs/srs-sip/pkg/api" + "github.com/ossrs/srs-sip/pkg/config" + "github.com/ossrs/srs-sip/pkg/service" + "github.com/ossrs/srs-sip/pkg/utils" +) + +func WaitTerminationSignal(cancel context.CancelFunc) { + sigc := make(chan os.Signal, 1) + signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM) + defer signal.Stop(sigc) + <-sigc + cancel() +} + +func main() { + ctx, cancel := context.WithCancel(context.Background()) + + conf := utils.Parse(ctx) + sipSvr, err := service.NewService(ctx, conf) + if err != nil { + logger.Ef("create service failed. err is %v", err.Error()) + return + } + + if err := sipSvr.Start(); err != nil { + logger.Ef("start sip service failed. err is %v", err.Error()) + return + } + + apiSvr, err := api.NewHttpApiServer(conf, sipSvr) + if err != nil { + logger.Ef("create http service failed. err is %v", err.Error()) + return + } + apiSvr.Start() + + var targetDir string + targetDirs := []string{"./web/html", "../web/html"} + for _, dir := range targetDirs { + if _, err := os.Stat(path.Join(dir, "index.html")); err == nil { + targetDir = dir + break + } + } + if targetDir == "" { + logger.Ef(ctx, "index.html not found in %v", targetDirs) + return + } + + go func() { + c := conf.(*config.MainConfig) + httpPort := strconv.Itoa(c.HttpServerPort) + server := &http.Server{ + Addr: ":" + httpPort, + Handler: http.FileServer(http.Dir(targetDir)), + ReadTimeout: 10 * time.Second, + WriteTimeout: 10 * time.Second, + IdleTimeout: 30 * time.Second, + ReadHeaderTimeout: 5 * time.Second, + } + logger.Tf(ctx, "http server listen on %s, home is %v", httpPort, targetDir) + if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed { + logger.Ef(ctx, "listen on %s failed", httpPort) + } + }() + + logger.Tf(ctx, "media server address is %v", conf.(*config.MainConfig).MediaAddr) + + WaitTerminationSignal(cancel) + + sipSvr.Stop() +} diff --git a/pkg/api/api-controller.go b/pkg/api/api-controller.go new file mode 100644 index 0000000..746ad10 --- /dev/null +++ b/pkg/api/api-controller.go @@ -0,0 +1,137 @@ +package api + +import ( + "encoding/json" + "net/http" + + "github.com/gorilla/mux" + "github.com/ossrs/srs-sip/pkg/service" +) + +func (h *HttpApiServer) RegisterRoutes(router *mux.Router) { + + apiV1Router := router.PathPrefix("/srs-sip/v1").Subrouter() + + // Add Auth middleware + //apiV1Router.Use(authMiddleware) + + apiV1Router.HandleFunc("/devices", h.ApiListDevices).Methods(http.MethodGet) + apiV1Router.HandleFunc("/devices/{id}/channels", h.ApiGetChannelByDeviceId).Methods(http.MethodGet) + apiV1Router.HandleFunc("/channels", h.ApiGetAllChannels).Methods(http.MethodGet) + + apiV1Router.HandleFunc("/invite", h.ApiInvite).Methods(http.MethodPost) + apiV1Router.HandleFunc("/bye", h.ApiBye).Methods(http.MethodPost) + apiV1Router.HandleFunc("/ptz", h.ApiPTZControl).Methods(http.MethodPost) + + apiV1Router.HandleFunc("", h.GetAPIRoutes(apiV1Router)).Methods(http.MethodGet) + + router.HandleFunc("/srs-sip", h.ApiGetAPIVersion).Methods(http.MethodGet) +} + +func (h *HttpApiServer) RespondWithJSON(w http.ResponseWriter, code int, data interface{}) { + w.Header().Set("Content-Type", "application/json") + wrapper := map[string]interface{}{ + "code": code, + "data": data, + } + json.NewEncoder(w).Encode(wrapper) +} + +func (h *HttpApiServer) RespondWithJSONSimple(w http.ResponseWriter, jsonStr string) { + w.Header().Set("Content-Type", "application/json") + w.Write([]byte(jsonStr)) +} + +func (h *HttpApiServer) GetAPIRoutes(router *mux.Router) http.HandlerFunc { + return func(w http.ResponseWriter, r *http.Request) { + var routes []map[string]string + + router.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error { + path, err := route.GetPathTemplate() + if err != nil { + return err + } + methods, err := route.GetMethods() + if err != nil { + return err + } + for _, method := range methods { + routes = append(routes, map[string]string{ + "method": method, + "path": path, + }) + } + return nil + }) + + h.RespondWithJSON(w, 0, routes) + } +} + +func (h *HttpApiServer) ApiGetAPIVersion(w http.ResponseWriter, r *http.Request) { + h.RespondWithJSONSimple(w, `{"version": "v1"}`) +} + +func (h *HttpApiServer) ApiListDevices(w http.ResponseWriter, r *http.Request) { + list := service.DM.GetDevices() + h.RespondWithJSON(w, 0, list) +} + +func (h *HttpApiServer) ApiGetChannelByDeviceId(w http.ResponseWriter, r *http.Request) { + vars := mux.Vars(r) + id := vars["id"] + channels := service.DM.ApiGetChannelByDeviceId(id) + h.RespondWithJSON(w, 0, channels) +} + +func (h *HttpApiServer) ApiGetAllChannels(w http.ResponseWriter, r *http.Request) { + channels := service.DM.GetAllVideoChannels() + h.RespondWithJSON(w, 0, channels) +} + +// request: {"device_id": "1", "channel_id": "1", "sub_stream": 0} +// response: {"code": 0, "data": {"channel_id": "1", "url": "webrtc://"}} +func (h *HttpApiServer) ApiInvite(w http.ResponseWriter, r *http.Request) { + // Parse request + var req map[string]string + err := json.NewDecoder(r.Body).Decode(&req) + if err != nil { + w.WriteHeader(http.StatusBadRequest) + return + } + + // Get device and channel + deviceID := req["device_id"] + channelID := req["channel_id"] + //subStream := req["sub_stream"] + + code := 0 + url := "" + + defer func() { + data := map[string]string{ + "channel_id": channelID, + "url": url, + } + h.RespondWithJSON(w, code, data) + }() + + if err := h.sipSvr.Uas.Invite(deviceID, channelID); err != nil { + code = http.StatusInternalServerError + return + } + c, ok := h.sipSvr.Uas.GetVideoChannelStatue(channelID) + if !ok { + code = http.StatusInternalServerError + return + } + url = "webrtc://" + h.conf.MediaAddr + "/live/" + c.Ssrc +} + +func (h *HttpApiServer) ApiBye(w http.ResponseWriter, r *http.Request) { + h.RespondWithJSONSimple(w, `{"msg":"Not implemented"}`) +} + +func (h *HttpApiServer) ApiPTZControl(w http.ResponseWriter, r *http.Request) { + h.RespondWithJSONSimple(w, `{"msg":"Not implemented"}`) +} diff --git a/pkg/api/api.go b/pkg/api/api.go new file mode 100644 index 0000000..483d0d9 --- /dev/null +++ b/pkg/api/api.go @@ -0,0 +1,45 @@ +package api + +import ( + "context" + "fmt" + "net/http" + + "github.com/ossrs/go-oryx-lib/logger" + + "github.com/gorilla/handlers" + "github.com/gorilla/mux" + "github.com/ossrs/srs-sip/pkg/config" + "github.com/ossrs/srs-sip/pkg/service" +) + +type HttpApiServer struct { + conf *config.MainConfig + sipSvr *service.Service +} + +func NewHttpApiServer(r0 interface{}, svr *service.Service) (*HttpApiServer, error) { + return &HttpApiServer{ + conf: r0.(*config.MainConfig), + sipSvr: svr, + }, nil +} + +func (h *HttpApiServer) Start() { + router := mux.NewRouter().StrictSlash(true) + h.RegisterRoutes(router) + + headers := handlers.AllowedHeaders([]string{"X-Requested-With", "Content-Type", "Authorization"}) + methods := handlers.AllowedMethods([]string{"GET", "POST", "PUT", "DELETE", "OPTIONS"}) + origins := handlers.AllowedOrigins([]string{"*"}) + + go func() { + ctx := context.Background() + addr := fmt.Sprintf(":%v", h.conf.APIPort) + logger.Tf(ctx, "http api listen on %s", addr) + err := http.ListenAndServe(addr, handlers.CORS(headers, methods, origins)(router)) + if err != nil { + panic(err) + } + }() +} diff --git a/pkg/config/config.go b/pkg/config/config.go new file mode 100644 index 0000000..9b6eed1 --- /dev/null +++ b/pkg/config/config.go @@ -0,0 +1,56 @@ +package config + +import ( + "fmt" + "net" +) + +type MainConfig struct { + Serial string `ymal:"serial"` + Realm string `ymal:"realm"` + SipHost string `ymal:"sip-host"` + SipPort int `ymal:"sip-port"` + MediaAddr string `ymal:"media-addr"` + HttpServerPort int `ymal:"http-server-port"` + APIPort int `ymal:"api-port"` +} + +func GetLocalIP() (string, error) { + ifaces, err := net.Interfaces() + if err != nil { + return "", nil + } + type Iface struct { + Name string + Addr net.IP + } + var candidates []Iface + for _, ifc := range ifaces { + if ifc.Flags&net.FlagUp == 0 || ifc.Flags&net.FlagUp == 0 { + continue + } + if ifc.Flags&(net.FlagPointToPoint|net.FlagLoopback) != 0 { + continue + } + addrs, err := ifc.Addrs() + if err != nil { + continue + } + for _, addr := range addrs { + ipnet, ok := addr.(*net.IPNet) + if !ok { + continue + } + if ip4 := ipnet.IP.To4(); ip4 != nil { + candidates = append(candidates, Iface{ + Name: ifc.Name, Addr: ip4, + }) + //logger.Tf("considering interface", "iface", ifc.Name, "ip", ip4) + } + } + } + if len(candidates) == 0 { + return "", fmt.Errorf("No local IP found") + } + return candidates[0].Addr.String(), nil +} diff --git a/pkg/service/cascade.go b/pkg/service/cascade.go new file mode 100644 index 0000000..e7360c6 --- /dev/null +++ b/pkg/service/cascade.go @@ -0,0 +1,17 @@ +package service + +import ( + "context" + + "github.com/emiago/sipgo" + "github.com/ossrs/srs-sip/pkg/config" +) + +type Cascade struct { + ua *sipgo.UserAgent + sipCli *sipgo.Client + sipSvr *sipgo.Server + + ctx context.Context + conf *config.MainConfig +} diff --git a/pkg/service/device.go b/pkg/service/device.go new file mode 100644 index 0000000..a635338 --- /dev/null +++ b/pkg/service/device.go @@ -0,0 +1,166 @@ +package service + +import ( + "sync" + + "github.com/ossrs/srs-sip/pkg/utils" +) + +// +// 34020000001320000002 +// 209 +// UNIVIEW +// HIC6622-IR@X33-VF +// IPC-B2202.7.11.230222 +// CivilCode +//
Address
+// 1 +// 75015310072008100002 +// 0 +// 1 +// 0 +// ON +// 0.0000000 +// 0.0000000 +// +// 1 +// 6/4/2 +// 0 +// +// + +type ChannelInfo struct { + DeviceID string `json:"device_id"` + ParentID string `json:"parent_id"` + Name string `json:"name"` + Manufacturer string `json:"manufacturer"` + Model string `json:"model"` + Owner string `json:"owner"` + CivilCode string `json:"civil_code"` + Address string `json:"address"` + Port int `json:"port"` + Parental int `json:"parental"` + SafetyWay int `json:"safety_way"` + RegisterWay int `json:"register_way"` + Secrecy int `json:"secrecy"` + IPAddress string `json:"ip_address"` + Status ChannelStatus `json:"status"` + Longitude float64 `json:"longitude"` + Latitude float64 `json:"latitude"` + Info struct { + PTZType int `json:"ptz_type"` + Resolution string `json:"resolution"` + DownloadSpeed string `json:"download_speed"` // 1/2/4/8 + } `json:"info"` + + // custom fields + Ssrc string `json:"ssrc"` +} + +type ChannelStatus string + +type DeviceInfo struct { + DeviceID string `json:"device_id"` + SourceAddr string `json:"source_addr"` + NetworkType string `json:"network_type"` + ChannelMap sync.Map `json:"-"` +} + +type deviceManager struct { + devices sync.Map +} + +var instance *deviceManager +var once sync.Once + +func GetDeviceManager() *deviceManager { + once.Do(func() { + instance = &deviceManager{ + devices: sync.Map{}, + } + }) + return instance +} + +func (dm *deviceManager) AddDevice(id string, info *DeviceInfo) { + dm.devices.Store(id, info) +} + +func (dm *deviceManager) RemoveDevice(id string) { + dm.devices.Delete(id) +} + +func (dm *deviceManager) GetDevices() []*DeviceInfo { + list := make([]*DeviceInfo, 0) + dm.devices.Range(func(key, value interface{}) bool { + list = append(list, value.(*DeviceInfo)) + return true + }) + return list +} + +func (dm *deviceManager) GetDevice(id string) (*DeviceInfo, bool) { + v, ok := dm.devices.Load(id) + if !ok { + return nil, false + } + return v.(*DeviceInfo), true +} + +func (dm *deviceManager) UpdateChannels(deviceID string, list ...ChannelInfo) { + device, ok := dm.GetDevice(deviceID) + if !ok { + return + } + + for _, channel := range list { + device.ChannelMap.Store(channel.DeviceID, channel) + } + dm.devices.Store(deviceID, device) +} + +func (dm *deviceManager) ApiGetChannelByDeviceId(deviceID string) []ChannelInfo { + device, ok := dm.GetDevice(deviceID) + if !ok { + return nil + } + + channels := make([]ChannelInfo, 0) + device.ChannelMap.Range(func(key, value interface{}) bool { + channels = append(channels, value.(ChannelInfo)) + return true + }) + return channels +} + +func (dm *deviceManager) GetAllVideoChannels() []ChannelInfo { + channels := make([]ChannelInfo, 0) + dm.devices.Range(func(key, value interface{}) bool { + device := value.(*DeviceInfo) + device.ChannelMap.Range(func(key, value interface{}) bool { + if utils.IsVideoChannel(value.(ChannelInfo).DeviceID) { + channels = append(channels, value.(ChannelInfo)) + return true + } + return true + }) + return true + }) + return channels +} + +func (dm *deviceManager) GetDeviceInfoByChannel(channelID string) (*DeviceInfo, bool) { + var device *DeviceInfo + found := false + dm.devices.Range(func(key, value interface{}) bool { + d := value.(*DeviceInfo) + _, ok := d.ChannelMap.Load(channelID) + if ok { + device = d + found = true + return false + } + return true + }) + return device, found +} diff --git a/pkg/service/inbound.go b/pkg/service/inbound.go new file mode 100644 index 0000000..e888996 --- /dev/null +++ b/pkg/service/inbound.go @@ -0,0 +1,153 @@ +package service + +import ( + "bytes" + "encoding/xml" + "net/http" + "strconv" + + "github.com/emiago/sipgo/sip" + "github.com/ossrs/go-oryx-lib/logger" + "github.com/ossrs/srs-sip/pkg/service/stack" + "golang.org/x/net/html/charset" +) + +const GB28181_ID_LENGTH = 20 + +type VideoChannelStatus struct { + ID string + ParentID string + MediaHost string + MediaPort int + Ssrc string + Status string +} + +func (s *UAS) onRegister(req *sip.Request, tx sip.ServerTransaction) { + id := req.From().Address.User + if len(id) != GB28181_ID_LENGTH { + logger.E(s.ctx, "invalid device ID") + return + } + + isUnregister := false + if exps := req.GetHeaders("Expires"); len(exps) > 0 { + exp := exps[0] + expSec, err := strconv.ParseInt(exp.Value(), 10, 32) + if err != nil { + logger.Ef(s.ctx, "parse expires header error: %s", err.Error()) + return + } + if expSec == 0 { + isUnregister = true + } + } else { + logger.E(s.ctx, "empty expires header") + return + } + + if isUnregister { + DM.RemoveDevice(id) + logger.Wf(s.ctx, "Device %s unregistered", id) + return + } else { + if d, ok := DM.GetDevice(id); !ok { + DM.AddDevice(id, &DeviceInfo{ + DeviceID: id, + SourceAddr: req.Source(), + NetworkType: req.Transport(), + }) + s.respondRegister(req, http.StatusOK, "OK", tx) + logger.Tf(s.ctx, "%s Register success, source:%s, req: %s", id, req.Source(), req.String()) + + go s.Catalog(id) + } else { + if d.SourceAddr != req.Source() { + logger.Ef(s.ctx, "Device %s[%s] already registered, %s is NOT allowed.", id, d.SourceAddr, req.Source()) + // TODO: 国标没有明确定义重复ID注册的处理方式，这里暂时返回冲突 + s.respondRegister(req, http.StatusConflict, "Conflict Device ID", tx) + } else { + // TODO: 刷新DM里面的设备信息 + s.respondRegister(req, http.StatusOK, "OK", tx) + } + } + } +} + +func (s *UAS) respondRegister(req *sip.Request, code sip.StatusCode, reason string, tx sip.ServerTransaction) { + res := stack.NewRegisterResponse(req, code, reason) + _ = tx.Respond(res) + +} + +func (s *UAS) onMessage(req *sip.Request, tx sip.ServerTransaction) { + id := req.From().Address.User + if len(id) != 20 { + logger.Ef(s.ctx, "invalid device ID %s", req.String()) + } + + //logger.Tf(s.ctx, "Received MESSAGE: %s", req.String()) + + temp := &struct { + XMLName xml.Name + CmdType string + SN int // 请求序列号，一般用于对应 request 和 response + DeviceID string + DeviceName string + Manufacturer string + Model string + Channel string + DeviceList []ChannelInfo `xml:"DeviceList>Item"` + // RecordList []*Record `xml:"RecordList>Item"` + // SumNum int + }{} + decoder := xml.NewDecoder(bytes.NewReader([]byte(req.Body()))) + decoder.CharsetReader = charset.NewReaderLabel + if err := decoder.Decode(temp); err != nil { + logger.Ef(s.ctx, "decode message error: %s\n message:%s", err.Error(), req.Body()) + } + var body string + switch temp.CmdType { + case "Keepalive": + logger.T(s.ctx, "Keepalive") + if _, ok := DM.GetDevice(temp.DeviceID); !ok { + // unregister device + tx.Respond(sip.NewResponseFromRequest(req, http.StatusBadRequest, "", nil)) + return + } + case "SensorCatalog": // 兼容宇视，非国标 + case "Catalog": + logger.T(s.ctx, "Catalog") + DM.UpdateChannels(temp.DeviceID, temp.DeviceList...) + //go s.AutoInvite(temp.DeviceID, temp.DeviceList...) + case "Alarm": + logger.T(s.ctx, "Alarm") + default: + logger.Wf(s.ctx, "Not supported CmdType: %s", temp.CmdType) + response := sip.NewResponseFromRequest(req, http.StatusBadRequest, "", nil) + tx.Respond(response) + return + } + tx.Respond(sip.NewResponseFromRequest(req, http.StatusOK, "OK", []byte(body))) +} + +func (s *UAS) onNotify(req *sip.Request, tx sip.ServerTransaction) { + logger.T(s.ctx, "Received NOTIFY request") + tx.Respond(sip.NewResponseFromRequest(req, http.StatusOK, "OK", nil)) +} + +func (s *UAS) AddVideoChannelStatue(channelID string, status VideoChannelStatus) { + s.channelsStatue.Store(channelID, status) +} + +func (s *UAS) GetVideoChannelStatue(channelID string) (VideoChannelStatus, bool) { + v, ok := s.channelsStatue.Load(channelID) + if !ok { + return VideoChannelStatus{}, false + } + return v.(VideoChannelStatus), true +} + +func (s *UAS) RemoveVideoChannelStatue(channelID string) { + s.channelsStatue.Delete(channelID) +} diff --git a/pkg/service/outbound.go b/pkg/service/outbound.go new file mode 100644 index 0000000..f3d19f1 --- /dev/null +++ b/pkg/service/outbound.go @@ -0,0 +1,169 @@ +package service + +import ( + "fmt" + "strings" + + "github.com/emiago/sipgo/sip" + "github.com/ossrs/go-oryx-lib/errors" + "github.com/ossrs/go-oryx-lib/logger" + "github.com/ossrs/srs-sip/pkg/service/stack" + "github.com/ossrs/srs-sip/pkg/utils" +) + +func (s *UAS) AutoInvite(deviceID string, list ...ChannelInfo) { + for _, c := range list { + if c.Status == "ON" && utils.IsVideoChannel(c.DeviceID) { + if err := s.Invite(deviceID, c.DeviceID); err != nil { + logger.Ef(s.ctx, "invite error: %s", err.Error()) + } + } + } +} + +func (s *UAS) Invite(deviceID, channelID string) error { + if s.isPublishing(channelID) { + return nil + } + + ssrc := utils.CreateSSRC(true) + + mediaPort, err := s.signal.Publish(ssrc, ssrc) + if err != nil { + return errors.Wrapf(err, "api gb publish request error") + } + + mediaHost := strings.Split(s.conf.MediaAddr, ":")[0] + if mediaHost == "" { + return errors.Errorf("media host is empty") + } + + sdpInfo := []string{ + "v=0", + fmt.Sprintf("o=%s 0 0 IN IP4 %s", channelID, mediaHost), + "s=" + "Play", + "u=" + channelID + ":0", + "c=IN IP4 " + mediaHost, + "t=0 0", // start time and end time + fmt.Sprintf("m=video %d TCP/RTP/AVP 96", mediaPort), + "a=recvonly", + "a=rtpmap:96 PS/90000", + "y=" + ssrc, + "\r\n", + } + if true { // support tcp only + sdpInfo = append(sdpInfo, "a=setup:passive", "a=connection:new") + } + + // TODO: 需要考虑不同设备，通道ID相同的情况 + d, ok := DM.GetDeviceInfoByChannel(channelID) + if !ok { + return errors.Errorf("device not found by %s", channelID) + } + + subject := fmt.Sprintf("%s:%s,%s:0", channelID, ssrc, s.conf.Serial) + + req, err := stack.NewInviteRequest([]byte(strings.Join(sdpInfo, "\r\n")), subject, stack.OutboundConfig{ + Via: d.SourceAddr, + To: d.DeviceID, + From: s.conf.Serial, + Transport: d.NetworkType, + }) + if err != nil { + return errors.Wrapf(err, "build invite request error") + } + tx, err := s.sipCli.TransactionRequest(s.ctx, req) + if err != nil { + return errors.Wrapf(err, "transaction request error") + } + + res, err := s.waitAnswer(tx) + if err != nil { + return errors.Wrapf(err, "wait answer error") + } + if res.StatusCode != 200 { + return errors.Errorf("invite response error: %s", res.String()) + } + + ack := sip.NewAckRequest(req, res, nil) + s.sipCli.WriteRequest(ack) + + s.AddVideoChannelStatue(channelID, VideoChannelStatus{ + ID: channelID, + ParentID: deviceID, + MediaHost: mediaHost, + MediaPort: mediaPort, + Ssrc: ssrc, + Status: "ON", + }) + + return nil +} + +func (s *UAS) isPublishing(channelID string) bool { + c, err := s.GetVideoChannelStatue(channelID) + if !err { + return false + } + + if p, err := s.signal.GetStreamStatus(c.Ssrc); err != nil || !p { + return false + } + return true +} + +func (s *UAS) Bye() error { + return nil +} + +func (s *UAS) Catalog(deviceID string) error { + var CatalogXML = ` + Catalog + %d + %s + + ` + + d, ok := DM.GetDevice(deviceID) + if !ok { + return errors.Errorf("device %s not found", deviceID) + } + + body := fmt.Sprintf(CatalogXML, s.getSN(), deviceID) + + req, err := stack.NewCatelogRequest([]byte(body), stack.OutboundConfig{ + Via: d.SourceAddr, + To: d.DeviceID, + From: s.conf.Serial, + Transport: d.NetworkType, + }) + if err != nil { + return errors.Wrapf(err, "build catalog request error") + } + + tx, err := s.sipCli.TransactionRequest(s.ctx, req) + if err != nil { + return errors.Wrapf(err, "transaction request error") + } + + res, err := s.waitAnswer(tx) + if err != nil { + return errors.Wrapf(err, "wait answer error") + } + logger.Tf(s.ctx, "catalog response: %s", res.String()) + + return nil + +} + +func (s *UAS) waitAnswer(tx sip.ClientTransaction) (*sip.Response, error) { + select { + case <-s.ctx.Done(): + return nil, errors.Errorf("context done") + case res := <-tx.Responses(): + if res.StatusCode == 100 || res.StatusCode == 101 || res.StatusCode == 180 || res.StatusCode == 183 { + return s.waitAnswer(tx) + } + return res, nil + } +} diff --git a/pkg/service/service.go b/pkg/service/service.go new file mode 100644 index 0000000..23eab31 --- /dev/null +++ b/pkg/service/service.go @@ -0,0 +1,52 @@ +package service + +import ( + "context" + + "github.com/emiago/sipgo" + "github.com/ossrs/srs-sip/pkg/config" + "github.com/rs/zerolog" +) + +type Service struct { + ctx context.Context + conf *config.MainConfig + Uac *UAC + Uas *UAS +} + +func NewService(ctx context.Context, r0 interface{}) (*Service, error) { + s := &Service{ + ctx: ctx, + conf: r0.(*config.MainConfig), + } + s.Uac = NewUac() + s.Uas = NewUas() + return s, nil +} + +func (s *Service) Start() error { + zerolog.SetGlobalLevel(zerolog.Disabled) + + ua, err := sipgo.NewUA( + sipgo.WithUserAgent(UserAgent), + ) + if err != nil { + return err + } + + if err := s.Uas.Start(ua, s.conf); err != nil { + return err + } + + // if err := s.Uac.Start(ua, s.conf); err != nil { + // return err + // } + + return nil +} + +func (s *Service) Stop() { + s.Uac.Stop() + s.Uas.Stop() +} diff --git a/pkg/service/stack/request.go b/pkg/service/stack/request.go new file mode 100644 index 0000000..49ccfe9 --- /dev/null +++ b/pkg/service/stack/request.go @@ -0,0 +1,68 @@ +package stack + +import ( + "github.com/emiago/sipgo/sip" + "github.com/ossrs/go-oryx-lib/errors" +) + +type OutboundConfig struct { + Transport string + Via string + From string + To string +} + +func newRequest(method sip.RequestMethod, body []byte, conf OutboundConfig) (*sip.Request, error) { + if len(conf.From) != 20 || len(conf.To) != 20 { + return nil, errors.Errorf("From or To length is not 20") + } + + dest := conf.Via + to := sip.Uri{User: conf.To, Host: conf.To[:10]} + from := &sip.Uri{User: conf.From, Host: conf.From[:10]} + + fromHeader := &sip.FromHeader{Address: *from, Params: sip.NewParams()} + fromHeader.Params.Add("tag", sip.GenerateTagN(16)) + + req := sip.NewRequest(method, to) + req.AppendHeader(fromHeader) + req.AppendHeader(&sip.ToHeader{Address: to}) + req.AppendHeader(&sip.ContactHeader{Address: *from}) + req.AppendHeader(sip.NewHeader("Max-Forwards", "70")) + req.SetBody(body) + req.SetDestination(dest) + req.SetTransport(conf.Transport) + + return req, nil +} + +func NewRegisterRequest(conf OutboundConfig) (*sip.Request, error) { + req, err := newRequest(sip.REGISTER, nil, conf) + if err != nil { + return nil, err + } + req.AppendHeader(sip.NewHeader("Expires", "3600")) + + return req, nil +} + +func NewInviteRequest(body []byte, subject string, conf OutboundConfig) (*sip.Request, error) { + req, err := newRequest(sip.INVITE, body, conf) + if err != nil { + return nil, err + } + req.AppendHeader(sip.NewHeader("Content-Type", "application/sdp")) + req.AppendHeader(sip.NewHeader("Subject", subject)) + + return req, nil +} + +func NewCatelogRequest(body []byte, conf OutboundConfig) (*sip.Request, error) { + req, err := newRequest(sip.MESSAGE, body, conf) + if err != nil { + return nil, err + } + req.AppendHeader(sip.NewHeader("Content-Type", "Application/MANSCDP+xml")) + + return req, nil +} diff --git a/pkg/service/stack/response.go b/pkg/service/stack/response.go new file mode 100644 index 0000000..0c5c1a4 --- /dev/null +++ b/pkg/service/stack/response.go @@ -0,0 +1,25 @@ +package stack + +import ( + "time" + + "github.com/emiago/sipgo/sip" +) + +const TIME_LAYOUT = "2024-01-01T00:00:00" +const EXPIRES_TIME = 3600 + +func NewRegisterResponse(req *sip.Request, code sip.StatusCode, reason string) *sip.Response { + resp := sip.NewResponseFromRequest(req, code, reason, nil) + + newTo := &sip.ToHeader{Address: resp.To().Address, Params: sip.NewParams()} + newTo.Params.Add("tag", sip.GenerateTagN(10)) + + resp.ReplaceHeader(newTo) + resp.RemoveHeader("Allow") + expires := sip.ExpiresHeader(EXPIRES_TIME) + resp.AppendHeader(&expires) + resp.AppendHeader(sip.NewHeader("Date", time.Now().Format(TIME_LAYOUT))) + + return resp +} diff --git a/pkg/service/uac.go b/pkg/service/uac.go new file mode 100644 index 0000000..bce532f --- /dev/null +++ b/pkg/service/uac.go @@ -0,0 +1,122 @@ +package service + +import ( + "context" + "fmt" + + "github.com/emiago/sipgo" + "github.com/emiago/sipgo/sip" + "github.com/ossrs/go-oryx-lib/errors" + "github.com/ossrs/go-oryx-lib/logger" + "github.com/ossrs/srs-sip/pkg/config" + "github.com/ossrs/srs-sip/pkg/service/stack" +) + +const ( + UserAgent = "SRS-SIP/1.0" +) + +type UAC struct { + *Cascade + + SN uint32 + LocalIP string +} + +func NewUac() *UAC { + ip, err := config.GetLocalIP() + if err != nil { + logger.E("get local ip failed") + return nil + } + + c := &UAC{ + Cascade: &Cascade{}, + LocalIP: ip, + } + return c +} + +func (c *UAC) Start(agent *sipgo.UserAgent, r0 interface{}) error { + var err error + + c.ctx = context.Background() + c.conf = r0.(*config.MainConfig) + + if agent == nil { + ua, err := sipgo.NewUA(sipgo.WithUserAgent(UserAgent)) + if err != nil { + return err + } + agent = ua + } + + c.sipCli, err = sipgo.NewClient(agent, sipgo.WithClientHostname(c.LocalIP)) + if err != nil { + return err + } + + c.sipSvr, err = sipgo.NewServer(agent) + if err != nil { + return err + } + + c.sipSvr.OnInvite(c.onInvite) + c.sipSvr.OnBye(c.onBye) + c.sipSvr.OnMessage(c.onMessage) + + go c.doRegister() + + return nil +} + +func (c *UAC) Stop() { + // TODO: 断开所有当前连接 + c.sipCli.Close() + c.sipSvr.Close() +} + +func (c *UAC) doRegister() error { + r, _ := stack.NewRegisterRequest(stack.OutboundConfig{ + From: "34020000001110000001", + To: "34020000002000000001", + Transport: "UDP", + Via: fmt.Sprintf("%s:%d", c.LocalIP, c.conf.SipPort), + }) + tx, err := c.sipCli.TransactionRequest(c.ctx, r) + if err != nil { + return errors.Wrapf(err, "transaction request error") + } + + rs, _ := c.getResponse(tx) + logger.Tf(c.ctx, "register response: %s", rs.String()) + return nil +} + +func (c *UAC) OnRequest(req *sip.Request, tx sip.ServerTransaction) { + switch req.Method { + case "INVITE": + c.onInvite(req, tx) + } +} + +func (c *UAC) onInvite(req *sip.Request, tx sip.ServerTransaction) { + logger.T(c.ctx, "onInvite") +} + +func (c *UAC) onBye(req *sip.Request, tx sip.ServerTransaction) { + logger.T(c.ctx, "onBye") +} + +func (c *UAC) onMessage(req *sip.Request, tx sip.ServerTransaction) { + logger.Tf(c.ctx, "onMessage %s", req.String()) +} + +func (c *UAC) getResponse(tx sip.ClientTransaction) (*sip.Response, error) { + select { + case <-tx.Done(): + return nil, fmt.Errorf("transaction died") + case res := <-tx.Responses(): + return res, nil + } +} diff --git a/pkg/service/uas.go b/pkg/service/uas.go new file mode 100644 index 0000000..6d41cce --- /dev/null +++ b/pkg/service/uas.go @@ -0,0 +1,137 @@ +package service + +import ( + "context" + "errors" + "fmt" + "net" + "sync" + + "github.com/emiago/sipgo" + "github.com/emiago/sipgo/sip" + "github.com/ossrs/go-oryx-lib/logger" + "github.com/ossrs/srs-sip/pkg/config" + "github.com/ossrs/srs-sip/pkg/signaling" +) + +type UAS struct { + *Cascade + + SN uint32 + channelsStatue sync.Map + signal signaling.ISignaling + + sipConnUDP *net.UDPConn + sipConnTCP *net.TCPListener +} + +var DM = GetDeviceManager() + +func NewUas() *UAS { + return &UAS{ + Cascade: &Cascade{}, + } +} + +func (s *UAS) Start(agent *sipgo.UserAgent, r0 interface{}) error { + ctx := context.Background() + conf := r0.(*config.MainConfig) + sig := &signaling.Srs{ + Ctx: ctx, + Addr: "http://" + conf.MediaAddr, + } + s.signal = sig + s.startSipServer(agent, ctx, r0) + return nil +} + +func (s *UAS) Stop() { + s.sipCli.Close() + s.sipSvr.Close() +} + +func (s *UAS) startSipServer(agent *sipgo.UserAgent, ctx context.Context, r0 interface{}) error { + conf := r0.(*config.MainConfig) + s.ctx = ctx + s.conf = conf + + if agent == nil { + ua, err := sipgo.NewUA(sipgo.WithUserAgent(UserAgent)) + if err != nil { + return err + } + agent = ua + } + + cli, err := sipgo.NewClient(agent) + if err != nil { + return err + } + s.sipCli = cli + + svr, err := sipgo.NewServer(agent) + if err != nil { + return err + } + s.sipSvr = svr + + s.sipSvr.OnRegister(s.onRegister) + s.sipSvr.OnMessage(s.onMessage) + s.sipSvr.OnNotify(s.onNotify) + + if err := s.startUDP(); err != nil { + return err + } + if err := s.startTCP(); err != nil { + return err + } + + return nil +} + +func (s *UAS) startUDP() error { + lis, err := net.ListenUDP("udp", &net.UDPAddr{ + IP: net.IPv4(0, 0, 0, 0), + Port: s.conf.SipPort, + }) + if err != nil { + return fmt.Errorf("cannot listen on the UDP signaling port %d: %w", s.conf.SipPort, err) + } + s.sipConnUDP = lis + logger.Tf(s.ctx, "sip signaling listening on UDP %s:%d", lis.LocalAddr().String(), s.conf.SipPort) + + go func() { + if err := s.sipSvr.ServeUDP(lis); err != nil { + panic(fmt.Errorf("SIP listen UDP error: %w", err)) + } + }() + return nil +} + +func (s *UAS) startTCP() error { + lis, err := net.ListenTCP("tcp", &net.TCPAddr{ + IP: net.IPv4(0, 0, 0, 0), + Port: s.conf.SipPort, + }) + if err != nil { + return fmt.Errorf("cannot listen on the TCP signaling port %d: %w", s.conf.SipPort, err) + } + s.sipConnTCP = lis + logger.Tf(s.ctx, "sip signaling listening on TCP %s:%d", lis.Addr().String(), s.conf.SipPort) + + go func() { + if err := s.sipSvr.ServeTCP(lis); err != nil && !errors.Is(err, net.ErrClosed) { + panic(fmt.Errorf("SIP listen TCP error: %w", err)) + } + }() + return nil +} + +func sipErrorResponse(tx sip.ServerTransaction, req *sip.Request) { + _ = tx.Respond(sip.NewResponseFromRequest(req, 400, "", nil)) +} + +func (s *UAS) getSN() uint32 { + s.SN++ + return s.SN +} diff --git a/pkg/signaling/signaling.go b/pkg/signaling/signaling.go new file mode 100644 index 0000000..68d66ed --- /dev/null +++ b/pkg/signaling/signaling.go @@ -0,0 +1,75 @@ +package signaling + +import ( + "bytes" + "context" + "encoding/json" + "io" + "net/http" + "time" + + "github.com/ossrs/go-oryx-lib/errors" + "github.com/ossrs/go-oryx-lib/logger" +) + +type ISignaling interface { + Publish(id, ssrc string) (int, error) + Unpublish(id string) error + GetStreamStatus(id string) (bool, error) +} + +// The r is HTTP API to request, like "http://localhost:1985/gb/v1/publish". +// The req is the HTTP request body, will be marshal to JSON object. nil is no body +// The res is the HTTP response body, already unmarshal to JSON object. +func apiRequest(ctx context.Context, r string, req interface{}, res interface{}) error { + var buf bytes.Buffer + if req != nil { + if err := json.NewEncoder(&buf).Encode(req); err != nil { + return errors.Wrapf(err, "Marshal body %v", req) + } + } + logger.Tf(ctx, "Request url api=%v with %v bytes", r, buf.Len()) + + method := "POST" + if req == nil { + method = "GET" + } + reqObj, err := http.NewRequest(method, r, &buf) + if err != nil { + return errors.Wrapf(err, "HTTP request %v", buf.String()) + } + + client := &http.Client{Timeout: 10 * time.Second} + resObj, err := client.Do(reqObj.WithContext(ctx)) + if err != nil { + return errors.Wrapf(err, "Do HTTP request %v", buf.String()) + } + defer resObj.Body.Close() + + if resObj.StatusCode != http.StatusOK { + return errors.Errorf("Server returned status code=%v", resObj.StatusCode) + } + + b2, err := io.ReadAll(resObj.Body) + if err != nil { + return errors.Wrapf(err, "Read response for %v", buf.String()) + } + logger.Tf(ctx, "Response from %v is %v bytes", r, len(b2)) + + errorCode := struct { + Code int `json:"code"` + }{} + if err := json.Unmarshal(b2, &errorCode); err != nil { + return errors.Wrapf(err, "Unmarshal %v", string(b2)) + } + if errorCode.Code != 0 { + return errors.Errorf("Server fail code=%v %v", errorCode.Code, string(b2)) + } + + if err := json.Unmarshal(b2, res); err != nil { + return errors.Wrapf(err, "Unmarshal %v", string(b2)) + } + logger.Tf(ctx, "Parse response to code=%v ok, %v", errorCode.Code, res) + + return nil +} diff --git a/pkg/signaling/srs.go b/pkg/signaling/srs.go new file mode 100644 index 0000000..93dcc25 --- /dev/null +++ b/pkg/signaling/srs.go @@ -0,0 +1,95 @@ +package signaling + +import ( + "context" + + "github.com/ossrs/go-oryx-lib/errors" +) + +type Srs struct { + Ctx context.Context + Addr string // The address of SRS, eg: http://localhost:1985 +} + +func (s *Srs) Publish(id, ssrc string) (int, error) { + req := struct { + Id string `json:"id"` + SSRC string `json:"ssrc"` + }{ + id, ssrc, + } + + res := struct { + Code int `json:"code"` + Port int `json:"port"` + }{} + + if err := apiRequest(s.Ctx, s.Addr+"/gb/v1/publish/", req, &res); err != nil { + return 0, errors.Wrapf(err, "gb/v1/publish") + } + + return res.Port, nil +} + +func (s *Srs) Unpublish(id string) error { + return nil +} + +// { +// "code": 0, +// "server": "vid-y19n6nm", +// "service": "382k456r", +// "pid": "9495", +// "streams": [{ +// "id": "vid-9y0ozy0", +// "name": "0551954854", +// "vhost": "vid-v2ws53u", +// "app": "live", +// "tcUrl": "webrtc://127.0.0.1:1985/live", +// "url": "/live/0551954854", +// "live_ms": 1720428680003, +// "clients": 1, +// "frames": 8431, +// "send_bytes": 66463941, +// "recv_bytes": 89323998, +// "kbps": { +// "recv_30s": 0, +// "send_30s": 0 +// }, +// "publish": { +// "active": false, +// "cid": "b3op069g" +// }, +// "video": null, +// "audio": null +// }] +// } +func (s *Srs) GetStreamStatus(id string) (bool, error) { + type Stream struct { + Id string `json:"id"` + Name string `json:"name"` + Publish struct { + Active bool `json:"active"` + Cid string `json:"cid"` + } `json:"publish"` + } + res := struct { + Code int `json:"code"` + Streams []Stream `json:"streams"` + }{} + + if err := apiRequest(s.Ctx, s.Addr+"/api/v1/streams?count=99", nil, &res); err != nil { + return false, errors.Wrapf(err, "api/v1/stream") + } + + if len(res.Streams) == 0 { + return false, nil + } else { + for _, v := range res.Streams { + if v.Name == id { + return v.Publish.Active, nil + } + } + } + return false, nil +} diff --git a/pkg/utils/utils.go b/pkg/utils/utils.go new file mode 100644 index 0000000..6ef376b --- /dev/null +++ b/pkg/utils/utils.go @@ -0,0 +1,66 @@ +package utils + +import ( + "context" + "crypto/rand" + "flag" + "math/big" + "os" + + "github.com/ossrs/srs-sip/pkg/config" +) + +func Parse(ctx context.Context) interface{} { + fl := flag.NewFlagSet(os.Args[0], flag.ContinueOnError) + + var conf config.MainConfig + fl.StringVar(&conf.Serial, "serial", "34020000002000000001", "The serial number") + fl.StringVar(&conf.Realm, "realm", "3402000000", "The realm") + fl.StringVar(&conf.SipHost, "sip-host", "0.0.0.0", "The SIP host") + fl.IntVar(&conf.SipPort, "sip-port", 5060, "The SIP port") + fl.StringVar(&conf.MediaAddr, "media-addr", "127.0.0.1:1985", "The api address of media server. like: 127.0.0.1:1985") + fl.IntVar(&conf.HttpServerPort, "http-server-port", 8888, "The port of http server") + fl.IntVar(&conf.APIPort, "api-port", 2020, "The port of http api server") + + fl.Usage = func() { + fl.PrintDefaults() + } + + if err := fl.Parse(os.Args[1:]); err == flag.ErrHelp { + os.Exit(0) + } + + showHelp := conf.MediaAddr == "" + if showHelp { + fl.Usage() + os.Exit(-1) + } + + return &conf +} + +func GenRandomNumber(n int) string { + var result string + for i := 0; i < n; i++ { + randomDigit, _ := rand.Int(rand.Reader, big.NewInt(10)) + result += randomDigit.String() + } + return result +} + +func CreateSSRC(isLive bool) string { + ssrc := make([]byte, 10) + if isLive { + ssrc[0] = '0' + } else { + ssrc[0] = '1' + } + copy(ssrc[1:], GenRandomNumber(9)) + return string(ssrc) +} + +// @see GB/T28181—2016 附录D 统一编码规则 +func IsVideoChannel(channelID string) bool { + deviceType := channelID[10:13] + return deviceType == "131" || deviceType == "132" +} diff --git a/tools/main.go b/tools/main.go new file mode 100644 index 0000000..fd9c08c --- /dev/null +++ b/tools/main.go @@ -0,0 +1,30 @@ +package main + +import ( + "context" + "os" + "os/signal" + "syscall" + + "github.com/ossrs/go-oryx-lib/logger" + "github.com/ossrs/srs-bench/gb28181" +) + +func main() { + ctx := context.Background() + + var conf interface{} + conf = gb28181.Parse(ctx) + + ctx, cancel := context.WithCancel(ctx) + go func() { + sigs := make(chan os.Signal, 1) + signal.Notify(sigs, syscall.SIGTERM, syscall.SIGINT) + for sig := range sigs { + logger.Wf(ctx, "Quit for signal %v", sig) + cancel() + } + }() + + gb28181.Run(ctx, conf) +} diff --git a/web/html/css/bootstrap.min.css b/web/html/css/bootstrap.min.css new file mode 100644 index 0000000..df96c86 --- /dev/null +++ b/web/html/css/bootstrap.min.css @@ -0,0 +1,9 @@ +/*! + * Bootstrap v2.3.2 + * + * Copyright 2013 Twitter, Inc + * Licensed under the Apache License v2.0 + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Designed and built with all the love in the world by @mdo and @fat. + */.clearfix{*zoom:1}.clearfix:before,.clearfix:after{display:table;line-height:0;content:""}.clearfix:after{clear:both}.hide-text{font:0/0 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25%,transparent 50%,rgba(255,255,255,0.15) 50%,rgba(255,255,255,0.15) 75%,transparent 75%,transparent);background-image:linear-gradient(45deg,rgba(255,255,255,0.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,0.15) 50%,rgba(255,255,255,0.15) 75%,transparent 75%,transparent)}.accordion{margin-bottom:20px}.accordion-group{margin-bottom:2px;border:1px solid #e5e5e5;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px}.accordion-heading{border-bottom:0}.accordion-heading .accordion-toggle{display:block;padding:8px 15px}.accordion-toggle{cursor:pointer}.accordion-inner{padding:9px 15px;border-top:1px solid #e5e5e5}.carousel{position:relative;margin-bottom:20px;line-height:1}.carousel-inner{position:relative;width:100%;overflow:hidden}.carousel-inner>.item{position:relative;display:none;-webkit-transition:.6s ease-in-out left;-moz-transition:.6s ease-in-out left;-o-transition:.6s ease-in-out left;transition:.6s ease-in-out left}.carousel-inner>.item>img,.carousel-inner>.item>a>img{display:block;line-height:1}.carousel-inner>.active,.carousel-inner>.next,.carousel-inner>.prev{display:block}.carousel-inner>.active{left:0}.carousel-inner>.next,.carousel-inner>.prev{position:absolute;top:0;width:100%}.carousel-inner>.next{left:100%}.carousel-inner>.prev{left:-100%}.carousel-inner>.next.left,.carousel-inner>.prev.right{left:0}.carousel-inner>.active.left{left:-100%}.carousel-inner>.active.right{left:100%}.carousel-control{position:absolute;top:40%;left:15px;width:40px;height:40px;margin-top:-20px;font-size:60px;font-weight:100;line-height:30px;color:#fff;text-align:center;background:#222;border:3px solid #fff;-webkit-border-radius:23px;-moz-border-radius:23px;border-radius:23px;opacity:.5;filter:alpha(opacity=50)}.carousel-control.right{right:15px;left:auto}.carousel-control:hover,.carousel-control:focus{color:#fff;text-decoration:none;opacity:.9;filter:alpha(opacity=90)}.carousel-indicators{position:absolute;top:15px;right:15px;z-index:5;margin:0;list-style:none}.carousel-indicators li{display:block;float:left;width:10px;height:10px;margin-left:5px;text-indent:-999px;background-color:#ccc;background-color:rgba(255,255,255,0.25);border-radius:5px}.carousel-indicators .active{background-color:#fff}.carousel-caption{position:absolute;right:0;bottom:0;left:0;padding:15px;background:#333;background:rgba(0,0,0,0.75)}.carousel-caption h4,.carousel-caption p{line-height:20px;color:#fff}.carousel-caption h4{margin:0 0 5px}.carousel-caption p{margin-bottom:0}.hero-unit{padding:60px;margin-bottom:30px;font-size:18px;font-weight:200;line-height:30px;color:inherit;background-color:#eee;-webkit-border-radius:6px;-moz-border-radius:6px;border-radius:6px}.hero-unit h1{margin-bottom:0;font-size:60px;line-height:1;letter-spacing:-1px;color:inherit}.hero-unit li{line-height:30px}.pull-right{float:right}.pull-left{float:left}.hide{display:none}.show{display:block}.invisible{visibility:hidden}.affix{position:fixed} diff --git a/web/html/img/tooltip.png b/web/html/img/tooltip.png new file mode 100644 index 0000000..eaee2ae Binary files /dev/null and b/web/html/img/tooltip.png differ diff --git a/web/html/index.html b/web/html/index.html new file mode 100644 index 0000000..91c381a --- /dev/null +++ b/web/html/index.html @@ -0,0 +1,865 @@ + + + + DEMO + + + + + + +
+
+
+ DEMO +
+ +
+
+
+
+
+
+
+ +

Usage:

 +

+ 请点击下面的图标，启用Flash +

+

+ 若没有见到这个图标，Chrome浏览器请打开 + chrome://settings/content/flash 并修改为"Ask first"。 +

+
+
+
+
+ +
+ API地址与端口 + +

+ +
+ +
+
+
+ 设备列表 +
+
    +
    + + +
    +
    + + + +
    +
    + 
    
+                  
    
+               
    
+            
    
+        
    
+      
    
+      
    
+
+      
    
+        
    
+            
                 
+            
    
+            
    
+                
    
+                  URL:
+                  
    
+                    
+                    
+                  
    
+                  
    
+                    
    Message
    
+                    
    
+                  
    
+               
    
+            
    
+        
    
+      
    
+
+      
    
+        
+
+        
+
+    
    
+
+    
+
    
+
+
+
+
+
+
+
+
+
+
+
diff --git a/web/html/js/AdobeFlashPlayerInstall.swf b/web/html/js/AdobeFlashPlayerInstall.swf
new file mode 100644
index 0000000..bdc3437
Binary files /dev/null and b/web/html/js/AdobeFlashPlayerInstall.swf differ
diff --git a/web/html/js/adapter-7.4.0.js b/web/html/js/adapter-7.4.0.js
new file mode 100644
index 0000000..bd8df9d
--- /dev/null
+++ b/web/html/js/adapter-7.4.0.js
@@ -0,0 +1,5551 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.adapter = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i 0 && arguments[0] !== undefined ? arguments[0] : {},
+      window = _ref.window;
+
+  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
+    shimChrome: true,
+    shimFirefox: true,
+    shimEdge: true,
+    shimSafari: true
+  };
+
+  // Utils.
+  var logging = utils.log;
+  var browserDetails = utils.detectBrowser(window);
+
+  var adapter = {
+    browserDetails: browserDetails,
+    commonShim: commonShim,
+    extractVersion: utils.extractVersion,
+    disableLog: utils.disableLog,
+    disableWarnings: utils.disableWarnings
+  };
+
+  // Shim browser if found.
+  switch (browserDetails.browser) {
+    case 'chrome':
+      if (!chromeShim || !chromeShim.shimPeerConnection || !options.shimChrome) {
+        logging('Chrome shim is not included in this adapter release.');
+        return adapter;
+      }
+      logging('adapter.js shimming chrome.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = chromeShim;
+
+      chromeShim.shimGetUserMedia(window);
+      chromeShim.shimMediaStream(window);
+      chromeShim.shimPeerConnection(window);
+      chromeShim.shimOnTrack(window);
+      chromeShim.shimAddTrackRemoveTrack(window);
+      chromeShim.shimGetSendersWithDtmf(window);
+      chromeShim.shimGetStats(window);
+      chromeShim.shimSenderReceiverGetStats(window);
+      chromeShim.fixNegotiationNeeded(window);
+
+      commonShim.shimRTCIceCandidate(window);
+      commonShim.shimConnectionState(window);
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      commonShim.removeAllowExtmapMixed(window);
+      break;
+    case 'firefox':
+      if (!firefoxShim || !firefoxShim.shimPeerConnection || !options.shimFirefox) {
+        logging('Firefox shim is not included in this adapter release.');
+        return adapter;
+      }
+      logging('adapter.js shimming firefox.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = firefoxShim;
+
+      firefoxShim.shimGetUserMedia(window);
+      firefoxShim.shimPeerConnection(window);
+      firefoxShim.shimOnTrack(window);
+      firefoxShim.shimRemoveStream(window);
+      firefoxShim.shimSenderGetStats(window);
+      firefoxShim.shimReceiverGetStats(window);
+      firefoxShim.shimRTCDataChannel(window);
+      firefoxShim.shimAddTransceiver(window);
+      firefoxShim.shimCreateOffer(window);
+      firefoxShim.shimCreateAnswer(window);
+
+      commonShim.shimRTCIceCandidate(window);
+      commonShim.shimConnectionState(window);
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      break;
+    case 'edge':
+      if (!edgeShim || !edgeShim.shimPeerConnection || !options.shimEdge) {
+        logging('MS edge shim is not included in this adapter release.');
+        return adapter;
+      }
+      logging('adapter.js shimming edge.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = edgeShim;
+
+      edgeShim.shimGetUserMedia(window);
+      edgeShim.shimGetDisplayMedia(window);
+      edgeShim.shimPeerConnection(window);
+      edgeShim.shimReplaceTrack(window);
+
+      // the edge shim implements the full RTCIceCandidate object.
+
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      break;
+    case 'safari':
+      if (!safariShim || !options.shimSafari) {
+        logging('Safari shim is not included in this adapter release.');
+        return adapter;
+      }
+      logging('adapter.js shimming safari.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = safariShim;
+
+      safariShim.shimRTCIceServerUrls(window);
+      safariShim.shimCreateOfferLegacy(window);
+      safariShim.shimCallbacksAPI(window);
+      safariShim.shimLocalStreamsAPI(window);
+      safariShim.shimRemoteStreamsAPI(window);
+      safariShim.shimTrackEventTransceiver(window);
+      safariShim.shimGetUserMedia(window);
+
+      commonShim.shimRTCIceCandidate(window);
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      commonShim.removeAllowExtmapMixed(window);
+      break;
+    default:
+      logging('Unsupported browser!');
+      break;
+  }
+
+  return adapter;
+}
+
+// Browser shims.
+
+},{"./chrome/chrome_shim":3,"./common_shim":6,"./edge/edge_shim":7,"./firefox/firefox_shim":11,"./safari/safari_shim":14,"./utils":15}],3:[function(require,module,exports){
+
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _getusermedia = require('./getusermedia');
+
+Object.defineProperty(exports, 'shimGetUserMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+
+var _getdisplaymedia = require('./getdisplaymedia');
+
+Object.defineProperty(exports, 'shimGetDisplayMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+exports.shimMediaStream = shimMediaStream;
+exports.shimOnTrack = shimOnTrack;
+exports.shimGetSendersWithDtmf = shimGetSendersWithDtmf;
+exports.shimGetStats = shimGetStats;
+exports.shimSenderReceiverGetStats = shimSenderReceiverGetStats;
+exports.shimAddTrackRemoveTrackWithNative = shimAddTrackRemoveTrackWithNative;
+exports.shimAddTrackRemoveTrack = shimAddTrackRemoveTrack;
+exports.shimPeerConnection = shimPeerConnection;
+exports.fixNegotiationNeeded = fixNegotiationNeeded;
+
+var _utils = require('../utils.js');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function shimMediaStream(window) {
+  window.MediaStream = window.MediaStream || window.webkitMediaStream;
+}
+
+function shimOnTrack(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('ontrack' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
+      get: function get() {
+        return this._ontrack;
+      },
+      set: function set(f) {
+        if (this._ontrack) {
+          this.removeEventListener('track', this._ontrack);
+        }
+        this.addEventListener('track', this._ontrack = f);
+      },
+
+      enumerable: true,
+      configurable: true
+    });
+    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
+      var _this = this;
+
+      if (!this._ontrackpoly) {
+        this._ontrackpoly = function (e) {
+          // onaddstream does not fire when a track is added to an existing
+          // stream. But stream.onaddtrack is implemented so we use that.
+          e.stream.addEventListener('addtrack', function (te) {
+            var receiver = void 0;
+            if (window.RTCPeerConnection.prototype.getReceivers) {
+              receiver = _this.getReceivers().find(function (r) {
+                return r.track && r.track.id === te.track.id;
+              });
+            } else {
+              receiver = { track: te.track };
+            }
+
+            var event = new Event('track');
+            event.track = te.track;
+            event.receiver = receiver;
+            event.transceiver = { receiver: receiver };
+            event.streams = [e.stream];
+            _this.dispatchEvent(event);
+          });
+          e.stream.getTracks().forEach(function (track) {
+            var receiver = void 0;
+            if (window.RTCPeerConnection.prototype.getReceivers) {
+              receiver = _this.getReceivers().find(function (r) {
+                return r.track && r.track.id === track.id;
+              });
+            } else {
+              receiver = { track: track };
+            }
+            var event = new Event('track');
+            event.track = track;
+            event.receiver = receiver;
+            event.transceiver = { receiver: receiver };
+            event.streams = [e.stream];
+            _this.dispatchEvent(event);
+          });
+        };
+        this.addEventListener('addstream', this._ontrackpoly);
+      }
+      return origSetRemoteDescription.apply(this, arguments);
+    };
+  } else {
+    // even if RTCRtpTransceiver is in window, it is only used and
+    // emitted in unified-plan. Unfortunately this means we need
+    // to unconditionally wrap the event.
+    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+      if (!e.transceiver) {
+        Object.defineProperty(e, 'transceiver', { value: { receiver: e.receiver } });
+      }
+      return e;
+    });
+  }
+}
+
+function shimGetSendersWithDtmf(window) {
+  // Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('getSenders' in window.RTCPeerConnection.prototype) && 'createDTMFSender' in window.RTCPeerConnection.prototype) {
+    var shimSenderWithDtmf = function shimSenderWithDtmf(pc, track) {
+      return {
+        track: track,
+        get dtmf() {
+          if (this._dtmf === undefined) {
+            if (track.kind === 'audio') {
+              this._dtmf = pc.createDTMFSender(track);
+            } else {
+              this._dtmf = null;
+            }
+          }
+          return this._dtmf;
+        },
+        _pc: pc
+      };
+    };
+
+    // augment addTrack when getSenders is not available.
+    if (!window.RTCPeerConnection.prototype.getSenders) {
+      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+        this._senders = this._senders || [];
+        return this._senders.slice(); // return a copy of the internal state.
+      };
+      var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+      window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
+        var sender = origAddTrack.apply(this, arguments);
+        if (!sender) {
+          sender = shimSenderWithDtmf(this, track);
+          this._senders.push(sender);
+        }
+        return sender;
+      };
+
+      var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
+      window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
+        origRemoveTrack.apply(this, arguments);
+        var idx = this._senders.indexOf(sender);
+        if (idx !== -1) {
+          this._senders.splice(idx, 1);
+        }
+      };
+    }
+    var origAddStream = window.RTCPeerConnection.prototype.addStream;
+    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+      var _this2 = this;
+
+      this._senders = this._senders || [];
+      origAddStream.apply(this, [stream]);
+      stream.getTracks().forEach(function (track) {
+        _this2._senders.push(shimSenderWithDtmf(_this2, track));
+      });
+    };
+
+    var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+      var _this3 = this;
+
+      this._senders = this._senders || [];
+      origRemoveStream.apply(this, [stream]);
+
+      stream.getTracks().forEach(function (track) {
+        var sender = _this3._senders.find(function (s) {
+          return s.track === track;
+        });
+        if (sender) {
+          // remove sender
+          _this3._senders.splice(_this3._senders.indexOf(sender), 1);
+        }
+      });
+    };
+  } else if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && 'getSenders' in window.RTCPeerConnection.prototype && 'createDTMFSender' in window.RTCPeerConnection.prototype && window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
+    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+      var _this4 = this;
+
+      var senders = origGetSenders.apply(this, []);
+      senders.forEach(function (sender) {
+        return sender._pc = _this4;
+      });
+      return senders;
+    };
+
+    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
+      get: function get() {
+        if (this._dtmf === undefined) {
+          if (this.track.kind === 'audio') {
+            this._dtmf = this._pc.createDTMFSender(this.track);
+          } else {
+            this._dtmf = null;
+          }
+        }
+        return this._dtmf;
+      }
+    });
+  }
+}
+
+function shimGetStats(window) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  var origGetStats = window.RTCPeerConnection.prototype.getStats;
+  window.RTCPeerConnection.prototype.getStats = function getStats() {
+    var _this5 = this;
+
+    var _arguments = Array.prototype.slice.call(arguments),
+        selector = _arguments[0],
+        onSucc = _arguments[1],
+        onErr = _arguments[2];
+
+    // If selector is a function then we are in the old style stats so just
+    // pass back the original getStats format to avoid breaking old users.
+
+
+    if (arguments.length > 0 && typeof selector === 'function') {
+      return origGetStats.apply(this, arguments);
+    }
+
+    // When spec-style getStats is supported, return those when called with
+    // either no arguments or the selector argument is null.
+    if (origGetStats.length === 0 && (arguments.length === 0 || typeof selector !== 'function')) {
+      return origGetStats.apply(this, []);
+    }
+
+    var fixChromeStats_ = function fixChromeStats_(response) {
+      var standardReport = {};
+      var reports = response.result();
+      reports.forEach(function (report) {
+        var standardStats = {
+          id: report.id,
+          timestamp: report.timestamp,
+          type: {
+            localcandidate: 'local-candidate',
+            remotecandidate: 'remote-candidate'
+          }[report.type] || report.type
+        };
+        report.names().forEach(function (name) {
+          standardStats[name] = report.stat(name);
+        });
+        standardReport[standardStats.id] = standardStats;
+      });
+
+      return standardReport;
+    };
+
+    // shim getStats with maplike support
+    var makeMapStats = function makeMapStats(stats) {
+      return new Map(Object.keys(stats).map(function (key) {
+        return [key, stats[key]];
+      }));
+    };
+
+    if (arguments.length >= 2) {
+      var successCallbackWrapper_ = function successCallbackWrapper_(response) {
+        onSucc(makeMapStats(fixChromeStats_(response)));
+      };
+
+      return origGetStats.apply(this, [successCallbackWrapper_, selector]);
+    }
+
+    // promise-support
+    return new Promise(function (resolve, reject) {
+      origGetStats.apply(_this5, [function (response) {
+        resolve(makeMapStats(fixChromeStats_(response)));
+      }, reject]);
+    }).then(onSucc, onErr);
+  };
+}
+
+function shimSenderReceiverGetStats(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender && window.RTCRtpReceiver)) {
+    return;
+  }
+
+  // shim sender stats.
+  if (!('getStats' in window.RTCRtpSender.prototype)) {
+    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+    if (origGetSenders) {
+      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+        var _this6 = this;
+
+        var senders = origGetSenders.apply(this, []);
+        senders.forEach(function (sender) {
+          return sender._pc = _this6;
+        });
+        return senders;
+      };
+    }
+
+    var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+    if (origAddTrack) {
+      window.RTCPeerConnection.prototype.addTrack = function addTrack() {
+        var sender = origAddTrack.apply(this, arguments);
+        sender._pc = this;
+        return sender;
+      };
+    }
+    window.RTCRtpSender.prototype.getStats = function getStats() {
+      var sender = this;
+      return this._pc.getStats().then(function (result) {
+        return (
+          /* Note: this will include stats of all senders that
+           *   send a track with the same id as sender.track as
+           *   it is not possible to identify the RTCRtpSender.
+           */
+          utils.filterStats(result, sender.track, true)
+        );
+      });
+    };
+  }
+
+  // shim receiver stats.
+  if (!('getStats' in window.RTCRtpReceiver.prototype)) {
+    var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
+    if (origGetReceivers) {
+      window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
+        var _this7 = this;
+
+        var receivers = origGetReceivers.apply(this, []);
+        receivers.forEach(function (receiver) {
+          return receiver._pc = _this7;
+        });
+        return receivers;
+      };
+    }
+    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+      e.receiver._pc = e.srcElement;
+      return e;
+    });
+    window.RTCRtpReceiver.prototype.getStats = function getStats() {
+      var receiver = this;
+      return this._pc.getStats().then(function (result) {
+        return utils.filterStats(result, receiver.track, false);
+      });
+    };
+  }
+
+  if (!('getStats' in window.RTCRtpSender.prototype && 'getStats' in window.RTCRtpReceiver.prototype)) {
+    return;
+  }
+
+  // shim RTCPeerConnection.getStats(track).
+  var origGetStats = window.RTCPeerConnection.prototype.getStats;
+  window.RTCPeerConnection.prototype.getStats = function getStats() {
+    if (arguments.length > 0 && arguments[0] instanceof window.MediaStreamTrack) {
+      var track = arguments[0];
+      var sender = void 0;
+      var receiver = void 0;
+      var err = void 0;
+      this.getSenders().forEach(function (s) {
+        if (s.track === track) {
+          if (sender) {
+            err = true;
+          } else {
+            sender = s;
+          }
+        }
+      });
+      this.getReceivers().forEach(function (r) {
+        if (r.track === track) {
+          if (receiver) {
+            err = true;
+          } else {
+            receiver = r;
+          }
+        }
+        return r.track === track;
+      });
+      if (err || sender && receiver) {
+        return Promise.reject(new DOMException('There are more than one sender or receiver for the track.', 'InvalidAccessError'));
+      } else if (sender) {
+        return sender.getStats();
+      } else if (receiver) {
+        return receiver.getStats();
+      }
+      return Promise.reject(new DOMException('There is no sender or receiver for the track.', 'InvalidAccessError'));
+    }
+    return origGetStats.apply(this, arguments);
+  };
+}
+
+function shimAddTrackRemoveTrackWithNative(window) {
+  // shim addTrack/removeTrack with native variants in order to make
+  // the interactions with legacy getLocalStreams behave as in other browsers.
+  // Keeps a mapping stream.id => [stream, rtpsenders...]
+  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
+    var _this8 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    return Object.keys(this._shimmedLocalStreams).map(function (streamId) {
+      return _this8._shimmedLocalStreams[streamId][0];
+    });
+  };
+
+  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
+    if (!stream) {
+      return origAddTrack.apply(this, arguments);
+    }
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+
+    var sender = origAddTrack.apply(this, arguments);
+    if (!this._shimmedLocalStreams[stream.id]) {
+      this._shimmedLocalStreams[stream.id] = [stream, sender];
+    } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {
+      this._shimmedLocalStreams[stream.id].push(sender);
+    }
+    return sender;
+  };
+
+  var origAddStream = window.RTCPeerConnection.prototype.addStream;
+  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+    var _this9 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+
+    stream.getTracks().forEach(function (track) {
+      var alreadyExists = _this9.getSenders().find(function (s) {
+        return s.track === track;
+      });
+      if (alreadyExists) {
+        throw new DOMException('Track already exists.', 'InvalidAccessError');
+      }
+    });
+    var existingSenders = this.getSenders();
+    origAddStream.apply(this, arguments);
+    var newSenders = this.getSenders().filter(function (newSender) {
+      return existingSenders.indexOf(newSender) === -1;
+    });
+    this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);
+  };
+
+  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    delete this._shimmedLocalStreams[stream.id];
+    return origRemoveStream.apply(this, arguments);
+  };
+
+  var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
+  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
+    var _this10 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    if (sender) {
+      Object.keys(this._shimmedLocalStreams).forEach(function (streamId) {
+        var idx = _this10._shimmedLocalStreams[streamId].indexOf(sender);
+        if (idx !== -1) {
+          _this10._shimmedLocalStreams[streamId].splice(idx, 1);
+        }
+        if (_this10._shimmedLocalStreams[streamId].length === 1) {
+          delete _this10._shimmedLocalStreams[streamId];
+        }
+      });
+    }
+    return origRemoveTrack.apply(this, arguments);
+  };
+}
+
+function shimAddTrackRemoveTrack(window) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  var browserDetails = utils.detectBrowser(window);
+  // shim addTrack and removeTrack.
+  if (window.RTCPeerConnection.prototype.addTrack && browserDetails.version >= 65) {
+    return shimAddTrackRemoveTrackWithNative(window);
+  }
+
+  // also shim pc.getLocalStreams when addTrack is shimmed
+  // to return the original streams.
+  var origGetLocalStreams = window.RTCPeerConnection.prototype.getLocalStreams;
+  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
+    var _this11 = this;
+
+    var nativeStreams = origGetLocalStreams.apply(this);
+    this._reverseStreams = this._reverseStreams || {};
+    return nativeStreams.map(function (stream) {
+      return _this11._reverseStreams[stream.id];
+    });
+  };
+
+  var origAddStream = window.RTCPeerConnection.prototype.addStream;
+  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+    var _this12 = this;
+
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+
+    stream.getTracks().forEach(function (track) {
+      var alreadyExists = _this12.getSenders().find(function (s) {
+        return s.track === track;
+      });
+      if (alreadyExists) {
+        throw new DOMException('Track already exists.', 'InvalidAccessError');
+      }
+    });
+    // Add identity mapping for consistency with addTrack.
+    // Unless this is being used with a stream from addTrack.
+    if (!this._reverseStreams[stream.id]) {
+      var newStream = new window.MediaStream(stream.getTracks());
+      this._streams[stream.id] = newStream;
+      this._reverseStreams[newStream.id] = stream;
+      stream = newStream;
+    }
+    origAddStream.apply(this, [stream]);
+  };
+
+  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+
+    origRemoveStream.apply(this, [this._streams[stream.id] || stream]);
+    delete this._reverseStreams[this._streams[stream.id] ? this._streams[stream.id].id : stream.id];
+    delete this._streams[stream.id];
+  };
+
+  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
+    var _this13 = this;
+
+    if (this.signalingState === 'closed') {
+      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
+    }
+    var streams = [].slice.call(arguments, 1);
+    if (streams.length !== 1 || !streams[0].getTracks().find(function (t) {
+      return t === track;
+    })) {
+      // this is not fully correct but all we can manage without
+      // [[associated MediaStreams]] internal slot.
+      throw new DOMException('The adapter.js addTrack polyfill only supports a single ' + ' stream which is associated with the specified track.', 'NotSupportedError');
+    }
+
+    var alreadyExists = this.getSenders().find(function (s) {
+      return s.track === track;
+    });
+    if (alreadyExists) {
+      throw new DOMException('Track already exists.', 'InvalidAccessError');
+    }
+
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+    var oldStream = this._streams[stream.id];
+    if (oldStream) {
+      // this is using odd Chrome behaviour, use with caution:
+      // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815
+      // Note: we rely on the high-level addTrack/dtmf shim to
+      // create the sender with a dtmf sender.
+      oldStream.addTrack(track);
+
+      // Trigger ONN async.
+      Promise.resolve().then(function () {
+        _this13.dispatchEvent(new Event('negotiationneeded'));
+      });
+    } else {
+      var newStream = new window.MediaStream([track]);
+      this._streams[stream.id] = newStream;
+      this._reverseStreams[newStream.id] = stream;
+      this.addStream(newStream);
+    }
+    return this.getSenders().find(function (s) {
+      return s.track === track;
+    });
+  };
+
+  // replace the internal stream id with the external one and
+  // vice versa.
+  function replaceInternalStreamId(pc, description) {
+    var sdp = description.sdp;
+    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
+      var externalStream = pc._reverseStreams[internalId];
+      var internalStream = pc._streams[externalStream.id];
+      sdp = sdp.replace(new RegExp(internalStream.id, 'g'), externalStream.id);
+    });
+    return new RTCSessionDescription({
+      type: description.type,
+      sdp: sdp
+    });
+  }
+  function replaceExternalStreamId(pc, description) {
+    var sdp = description.sdp;
+    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
+      var externalStream = pc._reverseStreams[internalId];
+      var internalStream = pc._streams[externalStream.id];
+      sdp = sdp.replace(new RegExp(externalStream.id, 'g'), internalStream.id);
+    });
+    return new RTCSessionDescription({
+      type: description.type,
+      sdp: sdp
+    });
+  }
+  ['createOffer', 'createAnswer'].forEach(function (method) {
+    var nativeMethod = window.RTCPeerConnection.prototype[method];
+    var methodObj = _defineProperty({}, method, function () {
+      var _this14 = this;
+
+      var args = arguments;
+      var isLegacyCall = arguments.length && typeof arguments[0] === 'function';
+      if (isLegacyCall) {
+        return nativeMethod.apply(this, [function (description) {
+          var desc = replaceInternalStreamId(_this14, description);
+          args[0].apply(null, [desc]);
+        }, function (err) {
+          if (args[1]) {
+            args[1].apply(null, err);
+          }
+        }, arguments[2]]);
+      }
+      return nativeMethod.apply(this, arguments).then(function (description) {
+        return replaceInternalStreamId(_this14, description);
+      });
+    });
+    window.RTCPeerConnection.prototype[method] = methodObj[method];
+  });
+
+  var origSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
+  window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {
+    if (!arguments.length || !arguments[0].type) {
+      return origSetLocalDescription.apply(this, arguments);
+    }
+    arguments[0] = replaceExternalStreamId(this, arguments[0]);
+    return origSetLocalDescription.apply(this, arguments);
+  };
+
+  // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier
+
+  var origLocalDescription = Object.getOwnPropertyDescriptor(window.RTCPeerConnection.prototype, 'localDescription');
+  Object.defineProperty(window.RTCPeerConnection.prototype, 'localDescription', {
+    get: function get() {
+      var description = origLocalDescription.get.apply(this);
+      if (description.type === '') {
+        return description;
+      }
+      return replaceInternalStreamId(this, description);
+    }
+  });
+
+  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
+    var _this15 = this;
+
+    if (this.signalingState === 'closed') {
+      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
+    }
+    // We can not yet check for sender instanceof RTCRtpSender
+    // since we shim RTPSender. So we check if sender._pc is set.
+    if (!sender._pc) {
+      throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.', 'TypeError');
+    }
+    var isLocal = sender._pc === this;
+    if (!isLocal) {
+      throw new DOMException('Sender was not created by this connection.', 'InvalidAccessError');
+    }
+
+    // Search for the native stream the senders track belongs to.
+    this._streams = this._streams || {};
+    var stream = void 0;
+    Object.keys(this._streams).forEach(function (streamid) {
+      var hasTrack = _this15._streams[streamid].getTracks().find(function (track) {
+        return sender.track === track;
+      });
+      if (hasTrack) {
+        stream = _this15._streams[streamid];
+      }
+    });
+
+    if (stream) {
+      if (stream.getTracks().length === 1) {
+        // if this is the last track of the stream, remove the stream. This
+        // takes care of any shimmed _senders.
+        this.removeStream(this._reverseStreams[stream.id]);
+      } else {
+        // relying on the same odd chrome behaviour as above.
+        stream.removeTrack(sender.track);
+      }
+      this.dispatchEvent(new Event('negotiationneeded'));
+    }
+  };
+}
+
+function shimPeerConnection(window) {
+  var browserDetails = utils.detectBrowser(window);
+
+  if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
+    // very basic support for old versions.
+    window.RTCPeerConnection = window.webkitRTCPeerConnection;
+  }
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  // shim implicit creation of RTCSessionDescription/RTCIceCandidate
+  if (browserDetails.version < 53) {
+    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
+      var nativeMethod = window.RTCPeerConnection.prototype[method];
+      var methodObj = _defineProperty({}, method, function () {
+        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
+        return nativeMethod.apply(this, arguments);
+      });
+      window.RTCPeerConnection.prototype[method] = methodObj[method];
+    });
+  }
+
+  // support for addIceCandidate(null or undefined)
+  var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
+  window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {
+    if (!arguments[0]) {
+      if (arguments[1]) {
+        arguments[1].apply(null);
+      }
+      return Promise.resolve();
+    }
+    // Firefox 68+ emits and processes {candidate: "", ...}, ignore
+    // in older versions. Native support planned for Chrome M77.
+    if (browserDetails.version < 78 && arguments[0] && arguments[0].candidate === '') {
+      return Promise.resolve();
+    }
+    return nativeAddIceCandidate.apply(this, arguments);
+  };
+}
+
+function fixNegotiationNeeded(window) {
+  utils.wrapPeerConnectionEvent(window, 'negotiationneeded', function (e) {
+    var pc = e.target;
+    if (pc.signalingState !== 'stable') {
+      return;
+    }
+    return e;
+  });
+}
+
+},{"../utils.js":15,"./getdisplaymedia":4,"./getusermedia":5}],4:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+function shimGetDisplayMedia(window, getSourceId) {
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+  // getSourceId is a function that returns a promise resolving with
+  // the sourceId of the screen/window/tab to be shared.
+  if (typeof getSourceId !== 'function') {
+    console.error('shimGetDisplayMedia: getSourceId argument is not ' + 'a function');
+    return;
+  }
+  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
+    return getSourceId(constraints).then(function (sourceId) {
+      var widthSpecified = constraints.video && constraints.video.width;
+      var heightSpecified = constraints.video && constraints.video.height;
+      var frameRateSpecified = constraints.video && constraints.video.frameRate;
+      constraints.video = {
+        mandatory: {
+          chromeMediaSource: 'desktop',
+          chromeMediaSourceId: sourceId,
+          maxFrameRate: frameRateSpecified || 3
+        }
+      };
+      if (widthSpecified) {
+        constraints.video.mandatory.maxWidth = widthSpecified;
+      }
+      if (heightSpecified) {
+        constraints.video.mandatory.maxHeight = heightSpecified;
+      }
+      return window.navigator.mediaDevices.getUserMedia(constraints);
+    });
+  };
+}
+
+},{}],5:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimGetUserMedia = shimGetUserMedia;
+
+var _utils = require('../utils.js');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+var logging = utils.log;
+
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  if (!navigator.mediaDevices) {
+    return;
+  }
+
+  var browserDetails = utils.detectBrowser(window);
+
+  var constraintsToChrome_ = function constraintsToChrome_(c) {
+    if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) !== 'object' || c.mandatory || c.optional) {
+      return c;
+    }
+    var cc = {};
+    Object.keys(c).forEach(function (key) {
+      if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
+        return;
+      }
+      var r = _typeof(c[key]) === 'object' ? c[key] : { ideal: c[key] };
+      if (r.exact !== undefined && typeof r.exact === 'number') {
+        r.min = r.max = r.exact;
+      }
+      var oldname_ = function oldname_(prefix, name) {
+        if (prefix) {
+          return prefix + name.charAt(0).toUpperCase() + name.slice(1);
+        }
+        return name === 'deviceId' ? 'sourceId' : name;
+      };
+      if (r.ideal !== undefined) {
+        cc.optional = cc.optional || [];
+        var oc = {};
+        if (typeof r.ideal === 'number') {
+          oc[oldname_('min', key)] = r.ideal;
+          cc.optional.push(oc);
+          oc = {};
+          oc[oldname_('max', key)] = r.ideal;
+          cc.optional.push(oc);
+        } else {
+          oc[oldname_('', key)] = r.ideal;
+          cc.optional.push(oc);
+        }
+      }
+      if (r.exact !== undefined && typeof r.exact !== 'number') {
+        cc.mandatory = cc.mandatory || {};
+        cc.mandatory[oldname_('', key)] = r.exact;
+      } else {
+        ['min', 'max'].forEach(function (mix) {
+          if (r[mix] !== undefined) {
+            cc.mandatory = cc.mandatory || {};
+            cc.mandatory[oldname_(mix, key)] = r[mix];
+          }
+        });
+      }
+    });
+    if (c.advanced) {
+      cc.optional = (cc.optional || []).concat(c.advanced);
+    }
+    return cc;
+  };
+
+  var shimConstraints_ = function shimConstraints_(constraints, func) {
+    if (browserDetails.version >= 61) {
+      return func(constraints);
+    }
+    constraints = JSON.parse(JSON.stringify(constraints));
+    if (constraints && _typeof(constraints.audio) === 'object') {
+      var remap = function remap(obj, a, b) {
+        if (a in obj && !(b in obj)) {
+          obj[b] = obj[a];
+          delete obj[a];
+        }
+      };
+      constraints = JSON.parse(JSON.stringify(constraints));
+      remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');
+      remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');
+      constraints.audio = constraintsToChrome_(constraints.audio);
+    }
+    if (constraints && _typeof(constraints.video) === 'object') {
+      // Shim facingMode for mobile & surface pro.
+      var face = constraints.video.facingMode;
+      face = face && ((typeof face === 'undefined' ? 'undefined' : _typeof(face)) === 'object' ? face : { ideal: face });
+      var getSupportedFacingModeLies = browserDetails.version < 66;
+
+      if (face && (face.exact === 'user' || face.exact === 'environment' || face.ideal === 'user' || face.ideal === 'environment') && !(navigator.mediaDevices.getSupportedConstraints && navigator.mediaDevices.getSupportedConstraints().facingMode && !getSupportedFacingModeLies)) {
+        delete constraints.video.facingMode;
+        var matches = void 0;
+        if (face.exact === 'environment' || face.ideal === 'environment') {
+          matches = ['back', 'rear'];
+        } else if (face.exact === 'user' || face.ideal === 'user') {
+          matches = ['front'];
+        }
+        if (matches) {
+          // Look for matches in label, or use last cam for back (typical).
+          return navigator.mediaDevices.enumerateDevices().then(function (devices) {
+            devices = devices.filter(function (d) {
+              return d.kind === 'videoinput';
+            });
+            var dev = devices.find(function (d) {
+              return matches.some(function (match) {
+                return d.label.toLowerCase().includes(match);
+              });
+            });
+            if (!dev && devices.length && matches.includes('back')) {
+              dev = devices[devices.length - 1]; // more likely the back cam
+            }
+            if (dev) {
+              constraints.video.deviceId = face.exact ? { exact: dev.deviceId } : { ideal: dev.deviceId };
+            }
+            constraints.video = constraintsToChrome_(constraints.video);
+            logging('chrome: ' + JSON.stringify(constraints));
+            return func(constraints);
+          });
+        }
+      }
+      constraints.video = constraintsToChrome_(constraints.video);
+    }
+    logging('chrome: ' + JSON.stringify(constraints));
+    return func(constraints);
+  };
+
+  var shimError_ = function shimError_(e) {
+    if (browserDetails.version >= 64) {
+      return e;
+    }
+    return {
+      name: {
+        PermissionDeniedError: 'NotAllowedError',
+        PermissionDismissedError: 'NotAllowedError',
+        InvalidStateError: 'NotAllowedError',
+        DevicesNotFoundError: 'NotFoundError',
+        ConstraintNotSatisfiedError: 'OverconstrainedError',
+        TrackStartError: 'NotReadableError',
+        MediaDeviceFailedDueToShutdown: 'NotAllowedError',
+        MediaDeviceKillSwitchOn: 'NotAllowedError',
+        TabCaptureError: 'AbortError',
+        ScreenCaptureError: 'AbortError',
+        DeviceCaptureError: 'AbortError'
+      }[e.name] || e.name,
+      message: e.message,
+      constraint: e.constraint || e.constraintName,
+      toString: function toString() {
+        return this.name + (this.message && ': ') + this.message;
+      }
+    };
+  };
+
+  var getUserMedia_ = function getUserMedia_(constraints, onSuccess, onError) {
+    shimConstraints_(constraints, function (c) {
+      navigator.webkitGetUserMedia(c, onSuccess, function (e) {
+        if (onError) {
+          onError(shimError_(e));
+        }
+      });
+    });
+  };
+  navigator.getUserMedia = getUserMedia_.bind(navigator);
+
+  // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
+  // function which returns a Promise, it does not accept spec-style
+  // constraints.
+  if (navigator.mediaDevices.getUserMedia) {
+    var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+    navigator.mediaDevices.getUserMedia = function (cs) {
+      return shimConstraints_(cs, function (c) {
+        return origGetUserMedia(c).then(function (stream) {
+          if (c.audio && !stream.getAudioTracks().length || c.video && !stream.getVideoTracks().length) {
+            stream.getTracks().forEach(function (track) {
+              track.stop();
+            });
+            throw new DOMException('', 'NotFoundError');
+          }
+          return stream;
+        }, function (e) {
+          return Promise.reject(shimError_(e));
+        });
+      });
+    };
+  }
+}
+
+},{"../utils.js":15}],6:[function(require,module,exports){
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimRTCIceCandidate = shimRTCIceCandidate;
+exports.shimMaxMessageSize = shimMaxMessageSize;
+exports.shimSendThrowTypeError = shimSendThrowTypeError;
+exports.shimConnectionState = shimConnectionState;
+exports.removeAllowExtmapMixed = removeAllowExtmapMixed;
+
+var _sdp = require('sdp');
+
+var _sdp2 = _interopRequireDefault(_sdp);
+
+var _utils = require('./utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function shimRTCIceCandidate(window) {
+  // foundation is arbitrarily chosen as an indicator for full support for
+  // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
+  if (!window.RTCIceCandidate || window.RTCIceCandidate && 'foundation' in window.RTCIceCandidate.prototype) {
+    return;
+  }
+
+  var NativeRTCIceCandidate = window.RTCIceCandidate;
+  window.RTCIceCandidate = function RTCIceCandidate(args) {
+    // Remove the a= which shouldn't be part of the candidate string.
+    if ((typeof args === 'undefined' ? 'undefined' : _typeof(args)) === 'object' && args.candidate && args.candidate.indexOf('a=') === 0) {
+      args = JSON.parse(JSON.stringify(args));
+      args.candidate = args.candidate.substr(2);
+    }
+
+    if (args.candidate && args.candidate.length) {
+      // Augment the native candidate with the parsed fields.
+      var nativeCandidate = new NativeRTCIceCandidate(args);
+      var parsedCandidate = _sdp2.default.parseCandidate(args.candidate);
+      var augmentedCandidate = Object.assign(nativeCandidate, parsedCandidate);
+
+      // Add a serializer that does not serialize the extra attributes.
+      augmentedCandidate.toJSON = function toJSON() {
+        return {
+          candidate: augmentedCandidate.candidate,
+          sdpMid: augmentedCandidate.sdpMid,
+          sdpMLineIndex: augmentedCandidate.sdpMLineIndex,
+          usernameFragment: augmentedCandidate.usernameFragment
+        };
+      };
+      return augmentedCandidate;
+    }
+    return new NativeRTCIceCandidate(args);
+  };
+  window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;
+
+  // Hook up the augmented candidate in onicecandidate and
+  // addEventListener('icecandidate', ...)
+  utils.wrapPeerConnectionEvent(window, 'icecandidate', function (e) {
+    if (e.candidate) {
+      Object.defineProperty(e, 'candidate', {
+        value: new window.RTCIceCandidate(e.candidate),
+        writable: 'false'
+      });
+    }
+    return e;
+  });
+}
+
+function shimMaxMessageSize(window) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  var browserDetails = utils.detectBrowser(window);
+
+  if (!('sctp' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {
+      get: function get() {
+        return typeof this._sctp === 'undefined' ? null : this._sctp;
+      }
+    });
+  }
+
+  var sctpInDescription = function sctpInDescription(description) {
+    if (!description || !description.sdp) {
+      return false;
+    }
+    var sections = _sdp2.default.splitSections(description.sdp);
+    sections.shift();
+    return sections.some(function (mediaSection) {
+      var mLine = _sdp2.default.parseMLine(mediaSection);
+      return mLine && mLine.kind === 'application' && mLine.protocol.indexOf('SCTP') !== -1;
+    });
+  };
+
+  var getRemoteFirefoxVersion = function getRemoteFirefoxVersion(description) {
+    // TODO: Is there a better solution for detecting Firefox?
+    var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);
+    if (match === null || match.length < 2) {
+      return -1;
+    }
+    var version = parseInt(match[1], 10);
+    // Test for NaN (yes, this is ugly)
+    return version !== version ? -1 : version;
+  };
+
+  var getCanSendMaxMessageSize = function getCanSendMaxMessageSize(remoteIsFirefox) {
+    // Every implementation we know can send at least 64 KiB.
+    // Note: Although Chrome is technically able to send up to 256 KiB, the
+    //       data does not reach the other peer reliably.
+    //       See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419
+    var canSendMaxMessageSize = 65536;
+    if (browserDetails.browser === 'firefox') {
+      if (browserDetails.version < 57) {
+        if (remoteIsFirefox === -1) {
+          // FF < 57 will send in 16 KiB chunks using the deprecated PPID
+          // fragmentation.
+          canSendMaxMessageSize = 16384;
+        } else {
+          // However, other FF (and RAWRTC) can reassemble PPID-fragmented
+          // messages. Thus, supporting ~2 GiB when sending.
+          canSendMaxMessageSize = 2147483637;
+        }
+      } else if (browserDetails.version < 60) {
+        // Currently, all FF >= 57 will reset the remote maximum message size
+        // to the default value when a data channel is created at a later
+        // stage. :(
+        // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
+        canSendMaxMessageSize = browserDetails.version === 57 ? 65535 : 65536;
+      } else {
+        // FF >= 60 supports sending ~2 GiB
+        canSendMaxMessageSize = 2147483637;
+      }
+    }
+    return canSendMaxMessageSize;
+  };
+
+  var getMaxMessageSize = function getMaxMessageSize(description, remoteIsFirefox) {
+    // Note: 65536 bytes is the default value from the SDP spec. Also,
+    //       every implementation we know supports receiving 65536 bytes.
+    var maxMessageSize = 65536;
+
+    // FF 57 has a slightly incorrect default remote max message size, so
+    // we need to adjust it here to avoid a failure when sending.
+    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697
+    if (browserDetails.browser === 'firefox' && browserDetails.version === 57) {
+      maxMessageSize = 65535;
+    }
+
+    var match = _sdp2.default.matchPrefix(description.sdp, 'a=max-message-size:');
+    if (match.length > 0) {
+      maxMessageSize = parseInt(match[0].substr(19), 10);
+    } else if (browserDetails.browser === 'firefox' && remoteIsFirefox !== -1) {
+      // If the maximum message size is not present in the remote SDP and
+      // both local and remote are Firefox, the remote peer can receive
+      // ~2 GiB.
+      maxMessageSize = 2147483637;
+    }
+    return maxMessageSize;
+  };
+
+  var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
+    this._sctp = null;
+    // Chrome decided to not expose .sctp in plan-b mode.
+    // As usual, adapter.js has to do an 'ugly worakaround'
+    // to cover up the mess.
+    if (browserDetails.browser === 'chrome' && browserDetails.version >= 76) {
+      var _getConfiguration = this.getConfiguration(),
+          sdpSemantics = _getConfiguration.sdpSemantics;
+
+      if (sdpSemantics === 'plan-b') {
+        Object.defineProperty(this, 'sctp', {
+          get: function get() {
+            return typeof this._sctp === 'undefined' ? null : this._sctp;
+          },
+
+          enumerable: true,
+          configurable: true
+        });
+      }
+    }
+
+    if (sctpInDescription(arguments[0])) {
+      // Check if the remote is FF.
+      var isFirefox = getRemoteFirefoxVersion(arguments[0]);
+
+      // Get the maximum message size the local peer is capable of sending
+      var canSendMMS = getCanSendMaxMessageSize(isFirefox);
+
+      // Get the maximum message size of the remote peer.
+      var remoteMMS = getMaxMessageSize(arguments[0], isFirefox);
+
+      // Determine final maximum message size
+      var maxMessageSize = void 0;
+      if (canSendMMS === 0 && remoteMMS === 0) {
+        maxMessageSize = Number.POSITIVE_INFINITY;
+      } else if (canSendMMS === 0 || remoteMMS === 0) {
+        maxMessageSize = Math.max(canSendMMS, remoteMMS);
+      } else {
+        maxMessageSize = Math.min(canSendMMS, remoteMMS);
+      }
+
+      // Create a dummy RTCSctpTransport object and the 'maxMessageSize'
+      // attribute.
+      var sctp = {};
+      Object.defineProperty(sctp, 'maxMessageSize', {
+        get: function get() {
+          return maxMessageSize;
+        }
+      });
+      this._sctp = sctp;
+    }
+
+    return origSetRemoteDescription.apply(this, arguments);
+  };
+}
+
+function shimSendThrowTypeError(window) {
+  if (!(window.RTCPeerConnection && 'createDataChannel' in window.RTCPeerConnection.prototype)) {
+    return;
+  }
+
+  // Note: Although Firefox >= 57 has a native implementation, the maximum
+  //       message size can be reset for all data channels at a later stage.
+  //       See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
+
+  function wrapDcSend(dc, pc) {
+    var origDataChannelSend = dc.send;
+    dc.send = function send() {
+      var data = arguments[0];
+      var length = data.length || data.size || data.byteLength;
+      if (dc.readyState === 'open' && pc.sctp && length > pc.sctp.maxMessageSize) {
+        throw new TypeError('Message too large (can send a maximum of ' + pc.sctp.maxMessageSize + ' bytes)');
+      }
+      return origDataChannelSend.apply(dc, arguments);
+    };
+  }
+  var origCreateDataChannel = window.RTCPeerConnection.prototype.createDataChannel;
+  window.RTCPeerConnection.prototype.createDataChannel = function createDataChannel() {
+    var dataChannel = origCreateDataChannel.apply(this, arguments);
+    wrapDcSend(dataChannel, this);
+    return dataChannel;
+  };
+  utils.wrapPeerConnectionEvent(window, 'datachannel', function (e) {
+    wrapDcSend(e.channel, e.target);
+    return e;
+  });
+}
+
+/* shims RTCConnectionState by pretending it is the same as iceConnectionState.
+ * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12
+ * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect
+ * since DTLS failures would be hidden. See
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827
+ * for the Firefox tracking bug.
+ */
+function shimConnectionState(window) {
+  if (!window.RTCPeerConnection || 'connectionState' in window.RTCPeerConnection.prototype) {
+    return;
+  }
+  var proto = window.RTCPeerConnection.prototype;
+  Object.defineProperty(proto, 'connectionState', {
+    get: function get() {
+      return {
+        completed: 'connected',
+        checking: 'connecting'
+      }[this.iceConnectionState] || this.iceConnectionState;
+    },
+
+    enumerable: true,
+    configurable: true
+  });
+  Object.defineProperty(proto, 'onconnectionstatechange', {
+    get: function get() {
+      return this._onconnectionstatechange || null;
+    },
+    set: function set(cb) {
+      if (this._onconnectionstatechange) {
+        this.removeEventListener('connectionstatechange', this._onconnectionstatechange);
+        delete this._onconnectionstatechange;
+      }
+      if (cb) {
+        this.addEventListener('connectionstatechange', this._onconnectionstatechange = cb);
+      }
+    },
+
+    enumerable: true,
+    configurable: true
+  });
+
+  ['setLocalDescription', 'setRemoteDescription'].forEach(function (method) {
+    var origMethod = proto[method];
+    proto[method] = function () {
+      if (!this._connectionstatechangepoly) {
+        this._connectionstatechangepoly = function (e) {
+          var pc = e.target;
+          if (pc._lastConnectionState !== pc.connectionState) {
+            pc._lastConnectionState = pc.connectionState;
+            var newEvent = new Event('connectionstatechange', e);
+            pc.dispatchEvent(newEvent);
+          }
+          return e;
+        };
+        this.addEventListener('iceconnectionstatechange', this._connectionstatechangepoly);
+      }
+      return origMethod.apply(this, arguments);
+    };
+  });
+}
+
+function removeAllowExtmapMixed(window) {
+  /* remove a=extmap-allow-mixed for Chrome < M71 */
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  var browserDetails = utils.detectBrowser(window);
+  if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {
+    return;
+  }
+  var nativeSRD = window.RTCPeerConnection.prototype.setRemoteDescription;
+  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription(desc) {
+    if (desc && desc.sdp && desc.sdp.indexOf('\na=extmap-allow-mixed') !== -1) {
+      desc.sdp = desc.sdp.split('\n').filter(function (line) {
+        return line.trim() !== 'a=extmap-allow-mixed';
+      }).join('\n');
+    }
+    return nativeSRD.apply(this, arguments);
+  };
+}
+
+},{"./utils":15,"sdp":17}],7:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;
+
+var _getusermedia = require('./getusermedia');
+
+Object.defineProperty(exports, 'shimGetUserMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+
+var _getdisplaymedia = require('./getdisplaymedia');
+
+Object.defineProperty(exports, 'shimGetDisplayMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+exports.shimPeerConnection = shimPeerConnection;
+exports.shimReplaceTrack = shimReplaceTrack;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+var _filtericeservers = require('./filtericeservers');
+
+var _rtcpeerconnectionShim = require('rtcpeerconnection-shim');
+
+var _rtcpeerconnectionShim2 = _interopRequireDefault(_rtcpeerconnectionShim);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function shimPeerConnection(window) {
+  var browserDetails = utils.detectBrowser(window);
+
+  if (window.RTCIceGatherer) {
+    if (!window.RTCIceCandidate) {
+      window.RTCIceCandidate = function RTCIceCandidate(args) {
+        return args;
+      };
+    }
+    if (!window.RTCSessionDescription) {
+      window.RTCSessionDescription = function RTCSessionDescription(args) {
+        return args;
+      };
+    }
+    // this adds an additional event listener to MediaStrackTrack that signals
+    // when a tracks enabled property was changed. Workaround for a bug in
+    // addStream, see below. No longer required in 15025+
+    if (browserDetails.version < 15025) {
+      var origMSTEnabled = Object.getOwnPropertyDescriptor(window.MediaStreamTrack.prototype, 'enabled');
+      Object.defineProperty(window.MediaStreamTrack.prototype, 'enabled', {
+        set: function set(value) {
+          origMSTEnabled.set.call(this, value);
+          var ev = new Event('enabled');
+          ev.enabled = value;
+          this.dispatchEvent(ev);
+        }
+      });
+    }
+  }
+
+  // ORTC defines the DTMF sender a bit different.
+  // https://github.com/w3c/ortc/issues/714
+  if (window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
+    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
+      get: function get() {
+        if (this._dtmf === undefined) {
+          if (this.track.kind === 'audio') {
+            this._dtmf = new window.RTCDtmfSender(this);
+          } else if (this.track.kind === 'video') {
+            this._dtmf = null;
+          }
+        }
+        return this._dtmf;
+      }
+    });
+  }
+  // Edge currently only implements the RTCDtmfSender, not the
+  // RTCDTMFSender alias. See http://draft.ortc.org/#rtcdtmfsender2*
+  if (window.RTCDtmfSender && !window.RTCDTMFSender) {
+    window.RTCDTMFSender = window.RTCDtmfSender;
+  }
+
+  var RTCPeerConnectionShim = (0, _rtcpeerconnectionShim2.default)(window, browserDetails.version);
+  window.RTCPeerConnection = function RTCPeerConnection(config) {
+    if (config && config.iceServers) {
+      config.iceServers = (0, _filtericeservers.filterIceServers)(config.iceServers, browserDetails.version);
+      utils.log('ICE servers after filtering:', config.iceServers);
+    }
+    return new RTCPeerConnectionShim(config);
+  };
+  window.RTCPeerConnection.prototype = RTCPeerConnectionShim.prototype;
+}
+
+function shimReplaceTrack(window) {
+  // ORTC has replaceTrack -- https://github.com/w3c/ortc/issues/614
+  if (window.RTCRtpSender && !('replaceTrack' in window.RTCRtpSender.prototype)) {
+    window.RTCRtpSender.prototype.replaceTrack = window.RTCRtpSender.prototype.setTrack;
+  }
+}
+
+},{"../utils":15,"./filtericeservers":8,"./getdisplaymedia":9,"./getusermedia":10,"rtcpeerconnection-shim":16}],8:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.filterIceServers = filterIceServers;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+// Edge does not like
+// 1) stun: filtered after 14393 unless ?transport=udp is present
+// 2) turn: that does not have all of turn:host:port?transport=udp
+// 3) turn: with ipv6 addresses
+// 4) turn: occurring muliple times
+function filterIceServers(iceServers, edgeVersion) {
+  var hasTurn = false;
+  iceServers = JSON.parse(JSON.stringify(iceServers));
+  return iceServers.filter(function (server) {
+    if (server && (server.urls || server.url)) {
+      var urls = server.urls || server.url;
+      if (server.url && !server.urls) {
+        utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
+      }
+      var isString = typeof urls === 'string';
+      if (isString) {
+        urls = [urls];
+      }
+      urls = urls.filter(function (url) {
+        // filter STUN unconditionally.
+        if (url.indexOf('stun:') === 0) {
+          return false;
+        }
+
+        var validTurn = url.startsWith('turn') && !url.startsWith('turn:[') && url.includes('transport=udp');
+        if (validTurn && !hasTurn) {
+          hasTurn = true;
+          return true;
+        }
+        return validTurn && !hasTurn;
+      });
+
+      delete server.url;
+      server.urls = isString ? urls[0] : urls;
+      return !!urls.length;
+    }
+  });
+}
+
+},{"../utils":15}],9:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+function shimGetDisplayMedia(window) {
+  if (!('getDisplayMedia' in window.navigator)) {
+    return;
+  }
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+  window.navigator.mediaDevices.getDisplayMedia = window.navigator.getDisplayMedia.bind(window.navigator);
+}
+
+},{}],10:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetUserMedia = shimGetUserMedia;
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  var shimError_ = function shimError_(e) {
+    return {
+      name: { PermissionDeniedError: 'NotAllowedError' }[e.name] || e.name,
+      message: e.message,
+      constraint: e.constraint,
+      toString: function toString() {
+        return this.name;
+      }
+    };
+  };
+
+  // getUserMedia error shim.
+  var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+  navigator.mediaDevices.getUserMedia = function (c) {
+    return origGetUserMedia(c).catch(function (e) {
+      return Promise.reject(shimError_(e));
+    });
+  };
+}
+
+},{}],11:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _getusermedia = require('./getusermedia');
+
+Object.defineProperty(exports, 'shimGetUserMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+
+var _getdisplaymedia = require('./getdisplaymedia');
+
+Object.defineProperty(exports, 'shimGetDisplayMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+exports.shimOnTrack = shimOnTrack;
+exports.shimPeerConnection = shimPeerConnection;
+exports.shimSenderGetStats = shimSenderGetStats;
+exports.shimReceiverGetStats = shimReceiverGetStats;
+exports.shimRemoveStream = shimRemoveStream;
+exports.shimRTCDataChannel = shimRTCDataChannel;
+exports.shimAddTransceiver = shimAddTransceiver;
+exports.shimCreateOffer = shimCreateOffer;
+exports.shimCreateAnswer = shimCreateAnswer;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function shimOnTrack(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
+    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
+      get: function get() {
+        return { receiver: this.receiver };
+      }
+    });
+  }
+}
+
+function shimPeerConnection(window) {
+  var browserDetails = utils.detectBrowser(window);
+
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {
+    return; // probably media.peerconnection.enabled=false in about:config
+  }
+  if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {
+    // very basic support for old versions.
+    window.RTCPeerConnection = window.mozRTCPeerConnection;
+  }
+
+  if (browserDetails.version < 53) {
+    // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
+    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
+      var nativeMethod = window.RTCPeerConnection.prototype[method];
+      var methodObj = _defineProperty({}, method, function () {
+        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
+        return nativeMethod.apply(this, arguments);
+      });
+      window.RTCPeerConnection.prototype[method] = methodObj[method];
+    });
+  }
+
+  // support for addIceCandidate(null or undefined)
+  // as well as ignoring {sdpMid, candidate: ""}
+  if (browserDetails.version < 68) {
+    var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
+    window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {
+      if (!arguments[0]) {
+        if (arguments[1]) {
+          arguments[1].apply(null);
+        }
+        return Promise.resolve();
+      }
+      // Firefox 68+ emits and processes {candidate: "", ...}, ignore
+      // in older versions.
+      if (arguments[0] && arguments[0].candidate === '') {
+        return Promise.resolve();
+      }
+      return nativeAddIceCandidate.apply(this, arguments);
+    };
+  }
+
+  var modernStatsTypes = {
+    inboundrtp: 'inbound-rtp',
+    outboundrtp: 'outbound-rtp',
+    candidatepair: 'candidate-pair',
+    localcandidate: 'local-candidate',
+    remotecandidate: 'remote-candidate'
+  };
+
+  var nativeGetStats = window.RTCPeerConnection.prototype.getStats;
+  window.RTCPeerConnection.prototype.getStats = function getStats() {
+    var _arguments = Array.prototype.slice.call(arguments),
+        selector = _arguments[0],
+        onSucc = _arguments[1],
+        onErr = _arguments[2];
+
+    return nativeGetStats.apply(this, [selector || null]).then(function (stats) {
+      if (browserDetails.version < 53 && !onSucc) {
+        // Shim only promise getStats with spec-hyphens in type names
+        // Leave callback version alone; misc old uses of forEach before Map
+        try {
+          stats.forEach(function (stat) {
+            stat.type = modernStatsTypes[stat.type] || stat.type;
+          });
+        } catch (e) {
+          if (e.name !== 'TypeError') {
+            throw e;
+          }
+          // Avoid TypeError: "type" is read-only, in old versions. 34-43ish
+          stats.forEach(function (stat, i) {
+            stats.set(i, Object.assign({}, stat, {
+              type: modernStatsTypes[stat.type] || stat.type
+            }));
+          });
+        }
+      }
+      return stats;
+    }).then(onSucc, onErr);
+  };
+}
+
+function shimSenderGetStats(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
+    return;
+  }
+  if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {
+    return;
+  }
+  var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+  if (origGetSenders) {
+    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+      var _this = this;
+
+      var senders = origGetSenders.apply(this, []);
+      senders.forEach(function (sender) {
+        return sender._pc = _this;
+      });
+      return senders;
+    };
+  }
+
+  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+  if (origAddTrack) {
+    window.RTCPeerConnection.prototype.addTrack = function addTrack() {
+      var sender = origAddTrack.apply(this, arguments);
+      sender._pc = this;
+      return sender;
+    };
+  }
+  window.RTCRtpSender.prototype.getStats = function getStats() {
+    return this.track ? this._pc.getStats(this.track) : Promise.resolve(new Map());
+  };
+}
+
+function shimReceiverGetStats(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
+    return;
+  }
+  if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {
+    return;
+  }
+  var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
+  if (origGetReceivers) {
+    window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
+      var _this2 = this;
+
+      var receivers = origGetReceivers.apply(this, []);
+      receivers.forEach(function (receiver) {
+        return receiver._pc = _this2;
+      });
+      return receivers;
+    };
+  }
+  utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+    e.receiver._pc = e.srcElement;
+    return e;
+  });
+  window.RTCRtpReceiver.prototype.getStats = function getStats() {
+    return this._pc.getStats(this.track);
+  };
+}
+
+function shimRemoveStream(window) {
+  if (!window.RTCPeerConnection || 'removeStream' in window.RTCPeerConnection.prototype) {
+    return;
+  }
+  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+    var _this3 = this;
+
+    utils.deprecated('removeStream', 'removeTrack');
+    this.getSenders().forEach(function (sender) {
+      if (sender.track && stream.getTracks().includes(sender.track)) {
+        _this3.removeTrack(sender);
+      }
+    });
+  };
+}
+
+function shimRTCDataChannel(window) {
+  // rename DataChannel to RTCDataChannel (native fix in FF60):
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851
+  if (window.DataChannel && !window.RTCDataChannel) {
+    window.RTCDataChannel = window.DataChannel;
+  }
+}
+
+function shimAddTransceiver(window) {
+  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
+  // Firefox ignores the init sendEncodings options passed to addTransceiver
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
+    return;
+  }
+  var origAddTransceiver = window.RTCPeerConnection.prototype.addTransceiver;
+  if (origAddTransceiver) {
+    window.RTCPeerConnection.prototype.addTransceiver = function addTransceiver() {
+      this.setParametersPromises = [];
+      var initParameters = arguments[1];
+      var shouldPerformCheck = initParameters && 'sendEncodings' in initParameters;
+      if (shouldPerformCheck) {
+        // If sendEncodings params are provided, validate grammar
+        initParameters.sendEncodings.forEach(function (encodingParam) {
+          if ('rid' in encodingParam) {
+            var ridRegex = /^[a-z0-9]{0,16}$/i;
+            if (!ridRegex.test(encodingParam.rid)) {
+              throw new TypeError('Invalid RID value provided.');
+            }
+          }
+          if ('scaleResolutionDownBy' in encodingParam) {
+            if (!(parseFloat(encodingParam.scaleResolutionDownBy) >= 1.0)) {
+              throw new RangeError('scale_resolution_down_by must be >= 1.0');
+            }
+          }
+          if ('maxFramerate' in encodingParam) {
+            if (!(parseFloat(encodingParam.maxFramerate) >= 0)) {
+              throw new RangeError('max_framerate must be >= 0.0');
+            }
+          }
+        });
+      }
+      var transceiver = origAddTransceiver.apply(this, arguments);
+      if (shouldPerformCheck) {
+        // Check if the init options were applied. If not we do this in an
+        // asynchronous way and save the promise reference in a global object.
+        // This is an ugly hack, but at the same time is way more robust than
+        // checking the sender parameters before and after the createOffer
+        // Also note that after the createoffer we are not 100% sure that
+        // the params were asynchronously applied so we might miss the
+        // opportunity to recreate offer.
+        var sender = transceiver.sender;
+
+        var params = sender.getParameters();
+        if (!('encodings' in params)) {
+          params.encodings = initParameters.sendEncodings;
+          this.setParametersPromises.push(sender.setParameters(params).catch(function () {}));
+        }
+      }
+      return transceiver;
+    };
+  }
+}
+
+function shimCreateOffer(window) {
+  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
+  // Firefox ignores the init sendEncodings options passed to addTransceiver
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
+    return;
+  }
+  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
+  window.RTCPeerConnection.prototype.createOffer = function createOffer() {
+    var _this4 = this,
+        _arguments2 = arguments;
+
+    if (this.setParametersPromises && this.setParametersPromises.length) {
+      return Promise.all(this.setParametersPromises).then(function () {
+        return origCreateOffer.apply(_this4, _arguments2);
+      }).finally(function () {
+        _this4.setParametersPromises = [];
+      });
+    }
+    return origCreateOffer.apply(this, arguments);
+  };
+}
+
+function shimCreateAnswer(window) {
+  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
+  // Firefox ignores the init sendEncodings options passed to addTransceiver
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
+    return;
+  }
+  var origCreateAnswer = window.RTCPeerConnection.prototype.createAnswer;
+  window.RTCPeerConnection.prototype.createAnswer = function createAnswer() {
+    var _this5 = this,
+        _arguments3 = arguments;
+
+    if (this.setParametersPromises && this.setParametersPromises.length) {
+      return Promise.all(this.setParametersPromises).then(function () {
+        return origCreateAnswer.apply(_this5, _arguments3);
+      }).finally(function () {
+        _this5.setParametersPromises = [];
+      });
+    }
+    return origCreateAnswer.apply(this, arguments);
+  };
+}
+
+},{"../utils":15,"./getdisplaymedia":12,"./getusermedia":13}],12:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+function shimGetDisplayMedia(window, preferredMediaSource) {
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
+    if (!(constraints && constraints.video)) {
+      var err = new DOMException('getDisplayMedia without video ' + 'constraints is undefined');
+      err.name = 'NotFoundError';
+      // from https://heycam.github.io/webidl/#idl-DOMException-error-names
+      err.code = 8;
+      return Promise.reject(err);
+    }
+    if (constraints.video === true) {
+      constraints.video = { mediaSource: preferredMediaSource };
+    } else {
+      constraints.video.mediaSource = preferredMediaSource;
+    }
+    return window.navigator.mediaDevices.getUserMedia(constraints);
+  };
+}
+
+},{}],13:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimGetUserMedia = shimGetUserMedia;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function shimGetUserMedia(window) {
+  var browserDetails = utils.detectBrowser(window);
+  var navigator = window && window.navigator;
+  var MediaStreamTrack = window && window.MediaStreamTrack;
+
+  navigator.getUserMedia = function (constraints, onSuccess, onError) {
+    // Replace Firefox 44+'s deprecation warning with unprefixed version.
+    utils.deprecated('navigator.getUserMedia', 'navigator.mediaDevices.getUserMedia');
+    navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
+  };
+
+  if (!(browserDetails.version > 55 && 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {
+    var remap = function remap(obj, a, b) {
+      if (a in obj && !(b in obj)) {
+        obj[b] = obj[a];
+        delete obj[a];
+      }
+    };
+
+    var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+    navigator.mediaDevices.getUserMedia = function (c) {
+      if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object' && _typeof(c.audio) === 'object') {
+        c = JSON.parse(JSON.stringify(c));
+        remap(c.audio, 'autoGainControl', 'mozAutoGainControl');
+        remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');
+      }
+      return nativeGetUserMedia(c);
+    };
+
+    if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {
+      var nativeGetSettings = MediaStreamTrack.prototype.getSettings;
+      MediaStreamTrack.prototype.getSettings = function () {
+        var obj = nativeGetSettings.apply(this, arguments);
+        remap(obj, 'mozAutoGainControl', 'autoGainControl');
+        remap(obj, 'mozNoiseSuppression', 'noiseSuppression');
+        return obj;
+      };
+    }
+
+    if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {
+      var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;
+      MediaStreamTrack.prototype.applyConstraints = function (c) {
+        if (this.kind === 'audio' && (typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object') {
+          c = JSON.parse(JSON.stringify(c));
+          remap(c, 'autoGainControl', 'mozAutoGainControl');
+          remap(c, 'noiseSuppression', 'mozNoiseSuppression');
+        }
+        return nativeApplyConstraints.apply(this, [c]);
+      };
+    }
+  }
+}
+
+},{"../utils":15}],14:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimLocalStreamsAPI = shimLocalStreamsAPI;
+exports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;
+exports.shimCallbacksAPI = shimCallbacksAPI;
+exports.shimGetUserMedia = shimGetUserMedia;
+exports.shimConstraints = shimConstraints;
+exports.shimRTCIceServerUrls = shimRTCIceServerUrls;
+exports.shimTrackEventTransceiver = shimTrackEventTransceiver;
+exports.shimCreateOfferLegacy = shimCreateOfferLegacy;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function shimLocalStreamsAPI(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+  if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+      return this._localStreams;
+    };
+  }
+  if (!('addStream' in window.RTCPeerConnection.prototype)) {
+    var _addTrack = window.RTCPeerConnection.prototype.addTrack;
+    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+      var _this = this;
+
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+      if (!this._localStreams.includes(stream)) {
+        this._localStreams.push(stream);
+      }
+      // Try to emulate Chrome's behaviour of adding in audio-video order.
+      // Safari orders by track id.
+      stream.getAudioTracks().forEach(function (track) {
+        return _addTrack.call(_this, track, stream);
+      });
+      stream.getVideoTracks().forEach(function (track) {
+        return _addTrack.call(_this, track, stream);
+      });
+    };
+
+    window.RTCPeerConnection.prototype.addTrack = function addTrack(track) {
+      var stream = arguments[1];
+      if (stream) {
+        if (!this._localStreams) {
+          this._localStreams = [stream];
+        } else if (!this._localStreams.includes(stream)) {
+          this._localStreams.push(stream);
+        }
+      }
+      return _addTrack.apply(this, arguments);
+    };
+  }
+  if (!('removeStream' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+      var _this2 = this;
+
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+      var index = this._localStreams.indexOf(stream);
+      if (index === -1) {
+        return;
+      }
+      this._localStreams.splice(index, 1);
+      var tracks = stream.getTracks();
+      this.getSenders().forEach(function (sender) {
+        if (tracks.includes(sender.track)) {
+          _this2.removeTrack(sender);
+        }
+      });
+    };
+  }
+}
+
+function shimRemoteStreamsAPI(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+  if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.getRemoteStreams = function getRemoteStreams() {
+      return this._remoteStreams ? this._remoteStreams : [];
+    };
+  }
+  if (!('onaddstream' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {
+      get: function get() {
+        return this._onaddstream;
+      },
+      set: function set(f) {
+        var _this3 = this;
+
+        if (this._onaddstream) {
+          this.removeEventListener('addstream', this._onaddstream);
+          this.removeEventListener('track', this._onaddstreampoly);
+        }
+        this.addEventListener('addstream', this._onaddstream = f);
+        this.addEventListener('track', this._onaddstreampoly = function (e) {
+          e.streams.forEach(function (stream) {
+            if (!_this3._remoteStreams) {
+              _this3._remoteStreams = [];
+            }
+            if (_this3._remoteStreams.includes(stream)) {
+              return;
+            }
+            _this3._remoteStreams.push(stream);
+            var event = new Event('addstream');
+            event.stream = stream;
+            _this3.dispatchEvent(event);
+          });
+        });
+      }
+    });
+    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
+      var pc = this;
+      if (!this._onaddstreampoly) {
+        this.addEventListener('track', this._onaddstreampoly = function (e) {
+          e.streams.forEach(function (stream) {
+            if (!pc._remoteStreams) {
+              pc._remoteStreams = [];
+            }
+            if (pc._remoteStreams.indexOf(stream) >= 0) {
+              return;
+            }
+            pc._remoteStreams.push(stream);
+            var event = new Event('addstream');
+            event.stream = stream;
+            pc.dispatchEvent(event);
+          });
+        });
+      }
+      return origSetRemoteDescription.apply(pc, arguments);
+    };
+  }
+}
+
+function shimCallbacksAPI(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+  var prototype = window.RTCPeerConnection.prototype;
+  var origCreateOffer = prototype.createOffer;
+  var origCreateAnswer = prototype.createAnswer;
+  var setLocalDescription = prototype.setLocalDescription;
+  var setRemoteDescription = prototype.setRemoteDescription;
+  var addIceCandidate = prototype.addIceCandidate;
+
+  prototype.createOffer = function createOffer(successCallback, failureCallback) {
+    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
+    var promise = origCreateOffer.apply(this, [options]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  prototype.createAnswer = function createAnswer(successCallback, failureCallback) {
+    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
+    var promise = origCreateAnswer.apply(this, [options]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  var withCallback = function withCallback(description, successCallback, failureCallback) {
+    var promise = setLocalDescription.apply(this, [description]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+  prototype.setLocalDescription = withCallback;
+
+  withCallback = function withCallback(description, successCallback, failureCallback) {
+    var promise = setRemoteDescription.apply(this, [description]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+  prototype.setRemoteDescription = withCallback;
+
+  withCallback = function withCallback(candidate, successCallback, failureCallback) {
+    var promise = addIceCandidate.apply(this, [candidate]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+  prototype.addIceCandidate = withCallback;
+}
+
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
+    // shim not needed in Safari 12.1
+    var mediaDevices = navigator.mediaDevices;
+    var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
+    navigator.mediaDevices.getUserMedia = function (constraints) {
+      return _getUserMedia(shimConstraints(constraints));
+    };
+  }
+
+  if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
+    navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {
+      navigator.mediaDevices.getUserMedia(constraints).then(cb, errcb);
+    }.bind(navigator);
+  }
+}
+
+function shimConstraints(constraints) {
+  if (constraints && constraints.video !== undefined) {
+    return Object.assign({}, constraints, { video: utils.compactObject(constraints.video) });
+  }
+
+  return constraints;
+}
+
+function shimRTCIceServerUrls(window) {
+  // migrate from non-spec RTCIceServer.url to RTCIceServer.urls
+  var OrigPeerConnection = window.RTCPeerConnection;
+  window.RTCPeerConnection = function RTCPeerConnection(pcConfig, pcConstraints) {
+    if (pcConfig && pcConfig.iceServers) {
+      var newIceServers = [];
+      for (var i = 0; i < pcConfig.iceServers.length; i++) {
+        var server = pcConfig.iceServers[i];
+        if (!server.hasOwnProperty('urls') && server.hasOwnProperty('url')) {
+          utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
+          server = JSON.parse(JSON.stringify(server));
+          server.urls = server.url;
+          delete server.url;
+          newIceServers.push(server);
+        } else {
+          newIceServers.push(pcConfig.iceServers[i]);
+        }
+      }
+      pcConfig.iceServers = newIceServers;
+    }
+    return new OrigPeerConnection(pcConfig, pcConstraints);
+  };
+  window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;
+  // wrap static methods. Currently just generateCertificate.
+  if ('generateCertificate' in window.RTCPeerConnection) {
+    Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
+      get: function get() {
+        return OrigPeerConnection.generateCertificate;
+      }
+    });
+  }
+}
+
+function shimTrackEventTransceiver(window) {
+  // Add event.transceiver member over deprecated event.receiver
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
+    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
+      get: function get() {
+        return { receiver: this.receiver };
+      }
+    });
+  }
+}
+
+function shimCreateOfferLegacy(window) {
+  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
+  window.RTCPeerConnection.prototype.createOffer = function createOffer(offerOptions) {
+    if (offerOptions) {
+      if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {
+        // support bit values
+        offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;
+      }
+      var audioTransceiver = this.getTransceivers().find(function (transceiver) {
+        return transceiver.receiver.track.kind === 'audio';
+      });
+      if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {
+        if (audioTransceiver.direction === 'sendrecv') {
+          if (audioTransceiver.setDirection) {
+            audioTransceiver.setDirection('sendonly');
+          } else {
+            audioTransceiver.direction = 'sendonly';
+          }
+        } else if (audioTransceiver.direction === 'recvonly') {
+          if (audioTransceiver.setDirection) {
+            audioTransceiver.setDirection('inactive');
+          } else {
+            audioTransceiver.direction = 'inactive';
+          }
+        }
+      } else if (offerOptions.offerToReceiveAudio === true && !audioTransceiver) {
+        this.addTransceiver('audio');
+      }
+
+      if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
+        // support bit values
+        offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
+      }
+      var videoTransceiver = this.getTransceivers().find(function (transceiver) {
+        return transceiver.receiver.track.kind === 'video';
+      });
+      if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
+        if (videoTransceiver.direction === 'sendrecv') {
+          if (videoTransceiver.setDirection) {
+            videoTransceiver.setDirection('sendonly');
+          } else {
+            videoTransceiver.direction = 'sendonly';
+          }
+        } else if (videoTransceiver.direction === 'recvonly') {
+          if (videoTransceiver.setDirection) {
+            videoTransceiver.setDirection('inactive');
+          } else {
+            videoTransceiver.direction = 'inactive';
+          }
+        }
+      } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {
+        this.addTransceiver('video');
+      }
+    }
+    return origCreateOffer.apply(this, arguments);
+  };
+}
+
+},{"../utils":15}],15:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.extractVersion = extractVersion;
+exports.wrapPeerConnectionEvent = wrapPeerConnectionEvent;
+exports.disableLog = disableLog;
+exports.disableWarnings = disableWarnings;
+exports.log = log;
+exports.deprecated = deprecated;
+exports.detectBrowser = detectBrowser;
+exports.compactObject = compactObject;
+exports.walkStats = walkStats;
+exports.filterStats = filterStats;
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+var logDisabled_ = true;
+var deprecationWarnings_ = true;
+
+/**
+ * Extract browser version out of the provided user agent string.
+ *
+ * @param {!string} uastring userAgent string.
+ * @param {!string} expr Regular expression used as match criteria.
+ * @param {!number} pos position in the version string to be returned.
+ * @return {!number} browser version.
+ */
+function extractVersion(uastring, expr, pos) {
+  var match = uastring.match(expr);
+  return match && match.length >= pos && parseInt(match[pos], 10);
+}
+
+// Wraps the peerconnection event eventNameToWrap in a function
+// which returns the modified event object (or false to prevent
+// the event).
+function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  var proto = window.RTCPeerConnection.prototype;
+  var nativeAddEventListener = proto.addEventListener;
+  proto.addEventListener = function (nativeEventName, cb) {
+    if (nativeEventName !== eventNameToWrap) {
+      return nativeAddEventListener.apply(this, arguments);
+    }
+    var wrappedCallback = function wrappedCallback(e) {
+      var modifiedEvent = wrapper(e);
+      if (modifiedEvent) {
+        cb(modifiedEvent);
+      }
+    };
+    this._eventMap = this._eventMap || {};
+    this._eventMap[cb] = wrappedCallback;
+    return nativeAddEventListener.apply(this, [nativeEventName, wrappedCallback]);
+  };
+
+  var nativeRemoveEventListener = proto.removeEventListener;
+  proto.removeEventListener = function (nativeEventName, cb) {
+    if (nativeEventName !== eventNameToWrap || !this._eventMap || !this._eventMap[cb]) {
+      return nativeRemoveEventListener.apply(this, arguments);
+    }
+    var unwrappedCb = this._eventMap[cb];
+    delete this._eventMap[cb];
+    return nativeRemoveEventListener.apply(this, [nativeEventName, unwrappedCb]);
+  };
+
+  Object.defineProperty(proto, 'on' + eventNameToWrap, {
+    get: function get() {
+      return this['_on' + eventNameToWrap];
+    },
+    set: function set(cb) {
+      if (this['_on' + eventNameToWrap]) {
+        this.removeEventListener(eventNameToWrap, this['_on' + eventNameToWrap]);
+        delete this['_on' + eventNameToWrap];
+      }
+      if (cb) {
+        this.addEventListener(eventNameToWrap, this['_on' + eventNameToWrap] = cb);
+      }
+    },
+
+    enumerable: true,
+    configurable: true
+  });
+}
+
+function disableLog(bool) {
+  if (typeof bool !== 'boolean') {
+    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
+  }
+  logDisabled_ = bool;
+  return bool ? 'adapter.js logging disabled' : 'adapter.js logging enabled';
+}
+
+/**
+ * Disable or enable deprecation warnings
+ * @param {!boolean} bool set to true to disable warnings.
+ */
+function disableWarnings(bool) {
+  if (typeof bool !== 'boolean') {
+    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
+  }
+  deprecationWarnings_ = !bool;
+  return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');
+}
+
+function log() {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object') {
+    if (logDisabled_) {
+      return;
+    }
+    if (typeof console !== 'undefined' && typeof console.log === 'function') {
+      console.log.apply(console, arguments);
+    }
+  }
+}
+
+/**
+ * Shows a deprecation warning suggesting the modern and spec-compatible API.
+ */
+function deprecated(oldMethod, newMethod) {
+  if (!deprecationWarnings_) {
+    return;
+  }
+  console.warn(oldMethod + ' is deprecated, please use ' + newMethod + ' instead.');
+}
+
+/**
+ * Browser detector.
+ *
+ * @return {object} result containing browser and version
+ *     properties.
+ */
+function detectBrowser(window) {
+  var navigator = window.navigator;
+
+  // Returned result object.
+
+  var result = { browser: null, version: null };
+
+  // Fail early if it's not a browser
+  if (typeof window === 'undefined' || !window.navigator) {
+    result.browser = 'Not a browser.';
+    return result;
+  }
+
+  if (navigator.mozGetUserMedia) {
+    // Firefox.
+    result.browser = 'firefox';
+    result.version = extractVersion(navigator.userAgent, /Firefox\/(\d+)\./, 1);
+  } else if (navigator.webkitGetUserMedia || window.isSecureContext === false && window.webkitRTCPeerConnection && !window.RTCIceGatherer) {
+    // Chrome, Chromium, Webview, Opera.
+    // Version matches Chrome/WebRTC version.
+    // Chrome 74 removed webkitGetUserMedia on http as well so we need the
+    // more complicated fallback to webkitRTCPeerConnection.
+    result.browser = 'chrome';
+    result.version = extractVersion(navigator.userAgent, /Chrom(e|ium)\/(\d+)\./, 2);
+  } else if (navigator.mediaDevices && navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
+    // Edge.
+    result.browser = 'edge';
+    result.version = extractVersion(navigator.userAgent, /Edge\/(\d+).(\d+)$/, 2);
+  } else if (window.RTCPeerConnection && navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) {
+    // Safari.
+    result.browser = 'safari';
+    result.version = extractVersion(navigator.userAgent, /AppleWebKit\/(\d+)\./, 1);
+    result.supportsUnifiedPlan = window.RTCRtpTransceiver && 'currentDirection' in window.RTCRtpTransceiver.prototype;
+  } else {
+    // Default fallthrough: not supported.
+    result.browser = 'Not a supported browser.';
+    return result;
+  }
+
+  return result;
+}
+
+/**
+ * Checks if something is an object.
+ *
+ * @param {*} val The something you want to check.
+ * @return true if val is an object, false otherwise.
+ */
+function isObject(val) {
+  return Object.prototype.toString.call(val) === '[object Object]';
+}
+
+/**
+ * Remove all empty objects and undefined values
+ * from a nested object -- an enhanced and vanilla version
+ * of Lodash's `compact`.
+ */
+function compactObject(data) {
+  if (!isObject(data)) {
+    return data;
+  }
+
+  return Object.keys(data).reduce(function (accumulator, key) {
+    var isObj = isObject(data[key]);
+    var value = isObj ? compactObject(data[key]) : data[key];
+    var isEmptyObject = isObj && !Object.keys(value).length;
+    if (value === undefined || isEmptyObject) {
+      return accumulator;
+    }
+    return Object.assign(accumulator, _defineProperty({}, key, value));
+  }, {});
+}
+
+/* iterates the stats graph recursively. */
+function walkStats(stats, base, resultSet) {
+  if (!base || resultSet.has(base.id)) {
+    return;
+  }
+  resultSet.set(base.id, base);
+  Object.keys(base).forEach(function (name) {
+    if (name.endsWith('Id')) {
+      walkStats(stats, stats.get(base[name]), resultSet);
+    } else if (name.endsWith('Ids')) {
+      base[name].forEach(function (id) {
+        walkStats(stats, stats.get(id), resultSet);
+      });
+    }
+  });
+}
+
+/* filter getStats for a sender/receiver track. */
+function filterStats(result, track, outbound) {
+  var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';
+  var filteredResult = new Map();
+  if (track === null) {
+    return filteredResult;
+  }
+  var trackStats = [];
+  result.forEach(function (value) {
+    if (value.type === 'track' && value.trackIdentifier === track.id) {
+      trackStats.push(value);
+    }
+  });
+  trackStats.forEach(function (trackStat) {
+    result.forEach(function (stats) {
+      if (stats.type === streamStatsType && stats.trackId === trackStat.id) {
+        walkStats(result, stats, filteredResult);
+      }
+    });
+  });
+  return filteredResult;
+}
+
+},{}],16:[function(require,module,exports){
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+ /* eslint-env node */
+'use strict';
+
+var SDPUtils = require('sdp');
+
+function fixStatsType(stat) {
+  return {
+    inboundrtp: 'inbound-rtp',
+    outboundrtp: 'outbound-rtp',
+    candidatepair: 'candidate-pair',
+    localcandidate: 'local-candidate',
+    remotecandidate: 'remote-candidate'
+  }[stat.type] || stat.type;
+}
+
+function writeMediaSection(transceiver, caps, type, stream, dtlsRole) {
+  var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);
+
+  // Map ICE parameters (ufrag, pwd) to SDP.
+  sdp += SDPUtils.writeIceParameters(
+      transceiver.iceGatherer.getLocalParameters());
+
+  // Map DTLS parameters to SDP.
+  sdp += SDPUtils.writeDtlsParameters(
+      transceiver.dtlsTransport.getLocalParameters(),
+      type === 'offer' ? 'actpass' : dtlsRole || 'active');
+
+  sdp += 'a=mid:' + transceiver.mid + '\r\n';
+
+  if (transceiver.rtpSender && transceiver.rtpReceiver) {
+    sdp += 'a=sendrecv\r\n';
+  } else if (transceiver.rtpSender) {
+    sdp += 'a=sendonly\r\n';
+  } else if (transceiver.rtpReceiver) {
+    sdp += 'a=recvonly\r\n';
+  } else {
+    sdp += 'a=inactive\r\n';
+  }
+
+  if (transceiver.rtpSender) {
+    var trackId = transceiver.rtpSender._initialTrackId ||
+        transceiver.rtpSender.track.id;
+    transceiver.rtpSender._initialTrackId = trackId;
+    // spec.
+    var msid = 'msid:' + (stream ? stream.id : '-') + ' ' +
+        trackId + '\r\n';
+    sdp += 'a=' + msid;
+    // for Chrome. Legacy should no longer be required.
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
+        ' ' + msid;
+
+    // RTX
+    if (transceiver.sendEncodingParameters[0].rtx) {
+      sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
+          ' ' + msid;
+      sdp += 'a=ssrc-group:FID ' +
+          transceiver.sendEncodingParameters[0].ssrc + ' ' +
+          transceiver.sendEncodingParameters[0].rtx.ssrc +
+          '\r\n';
+    }
+  }
+  // FIXME: this should be written by writeRtpDescription.
+  sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
+      ' cname:' + SDPUtils.localCName + '\r\n';
+  if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
+        ' cname:' + SDPUtils.localCName + '\r\n';
+  }
+  return sdp;
+}
+
+// Edge does not like
+// 1) stun: filtered after 14393 unless ?transport=udp is present
+// 2) turn: that does not have all of turn:host:port?transport=udp
+// 3) turn: with ipv6 addresses
+// 4) turn: occurring muliple times
+function filterIceServers(iceServers, edgeVersion) {
+  var hasTurn = false;
+  iceServers = JSON.parse(JSON.stringify(iceServers));
+  return iceServers.filter(function(server) {
+    if (server && (server.urls || server.url)) {
+      var urls = server.urls || server.url;
+      if (server.url && !server.urls) {
+        console.warn('RTCIceServer.url is deprecated! Use urls instead.');
+      }
+      var isString = typeof urls === 'string';
+      if (isString) {
+        urls = [urls];
+      }
+      urls = urls.filter(function(url) {
+        var validTurn = url.indexOf('turn:') === 0 &&
+            url.indexOf('transport=udp') !== -1 &&
+            url.indexOf('turn:[') === -1 &&
+            !hasTurn;
+
+        if (validTurn) {
+          hasTurn = true;
+          return true;
+        }
+        return url.indexOf('stun:') === 0 && edgeVersion >= 14393 &&
+            url.indexOf('?transport=udp') === -1;
+      });
+
+      delete server.url;
+      server.urls = isString ? urls[0] : urls;
+      return !!urls.length;
+    }
+  });
+}
+
+// Determines the intersection of local and remote capabilities.
+function getCommonCapabilities(localCapabilities, remoteCapabilities) {
+  var commonCapabilities = {
+    codecs: [],
+    headerExtensions: [],
+    fecMechanisms: []
+  };
+
+  var findCodecByPayloadType = function(pt, codecs) {
+    pt = parseInt(pt, 10);
+    for (var i = 0; i < codecs.length; i++) {
+      if (codecs[i].payloadType === pt ||
+          codecs[i].preferredPayloadType === pt) {
+        return codecs[i];
+      }
+    }
+  };
+
+  var rtxCapabilityMatches = function(lRtx, rRtx, lCodecs, rCodecs) {
+    var lCodec = findCodecByPayloadType(lRtx.parameters.apt, lCodecs);
+    var rCodec = findCodecByPayloadType(rRtx.parameters.apt, rCodecs);
+    return lCodec && rCodec &&
+        lCodec.name.toLowerCase() === rCodec.name.toLowerCase();
+  };
+
+  localCapabilities.codecs.forEach(function(lCodec) {
+    for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
+      var rCodec = remoteCapabilities.codecs[i];
+      if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() &&
+          lCodec.clockRate === rCodec.clockRate) {
+        if (lCodec.name.toLowerCase() === 'rtx' &&
+            lCodec.parameters && rCodec.parameters.apt) {
+          // for RTX we need to find the local rtx that has a apt
+          // which points to the same local codec as the remote one.
+          if (!rtxCapabilityMatches(lCodec, rCodec,
+              localCapabilities.codecs, remoteCapabilities.codecs)) {
+            continue;
+          }
+        }
+        rCodec = JSON.parse(JSON.stringify(rCodec)); // deepcopy
+        // number of channels is the highest common number of channels
+        rCodec.numChannels = Math.min(lCodec.numChannels,
+            rCodec.numChannels);
+        // push rCodec so we reply with offerer payload type
+        commonCapabilities.codecs.push(rCodec);
+
+        // determine common feedback mechanisms
+        rCodec.rtcpFeedback = rCodec.rtcpFeedback.filter(function(fb) {
+          for (var j = 0; j < lCodec.rtcpFeedback.length; j++) {
+            if (lCodec.rtcpFeedback[j].type === fb.type &&
+                lCodec.rtcpFeedback[j].parameter === fb.parameter) {
+              return true;
+            }
+          }
+          return false;
+        });
+        // FIXME: also need to determine .parameters
+        //  see https://github.com/openpeer/ortc/issues/569
+        break;
+      }
+    }
+  });
+
+  localCapabilities.headerExtensions.forEach(function(lHeaderExtension) {
+    for (var i = 0; i < remoteCapabilities.headerExtensions.length;
+         i++) {
+      var rHeaderExtension = remoteCapabilities.headerExtensions[i];
+      if (lHeaderExtension.uri === rHeaderExtension.uri) {
+        commonCapabilities.headerExtensions.push(rHeaderExtension);
+        break;
+      }
+    }
+  });
+
+  // FIXME: fecMechanisms
+  return commonCapabilities;
+}
+
+// is action=setLocalDescription with type allowed in signalingState
+function isActionAllowedInSignalingState(action, type, signalingState) {
+  return {
+    offer: {
+      setLocalDescription: ['stable', 'have-local-offer'],
+      setRemoteDescription: ['stable', 'have-remote-offer']
+    },
+    answer: {
+      setLocalDescription: ['have-remote-offer', 'have-local-pranswer'],
+      setRemoteDescription: ['have-local-offer', 'have-remote-pranswer']
+    }
+  }[type][action].indexOf(signalingState) !== -1;
+}
+
+function maybeAddCandidate(iceTransport, candidate) {
+  // Edge's internal representation adds some fields therefore
+  // not all fieldѕ are taken into account.
+  var alreadyAdded = iceTransport.getRemoteCandidates()
+      .find(function(remoteCandidate) {
+        return candidate.foundation === remoteCandidate.foundation &&
+            candidate.ip === remoteCandidate.ip &&
+            candidate.port === remoteCandidate.port &&
+            candidate.priority === remoteCandidate.priority &&
+            candidate.protocol === remoteCandidate.protocol &&
+            candidate.type === remoteCandidate.type;
+      });
+  if (!alreadyAdded) {
+    iceTransport.addRemoteCandidate(candidate);
+  }
+  return !alreadyAdded;
+}
+
+
+function makeError(name, description) {
+  var e = new Error(description);
+  e.name = name;
+  // legacy error codes from https://heycam.github.io/webidl/#idl-DOMException-error-names
+  e.code = {
+    NotSupportedError: 9,
+    InvalidStateError: 11,
+    InvalidAccessError: 15,
+    TypeError: undefined,
+    OperationError: undefined
+  }[name];
+  return e;
+}
+
+module.exports = function(window, edgeVersion) {
+  // https://w3c.github.io/mediacapture-main/#mediastream
+  // Helper function to add the track to the stream and
+  // dispatch the event ourselves.
+  function addTrackToStreamAndFireEvent(track, stream) {
+    stream.addTrack(track);
+    stream.dispatchEvent(new window.MediaStreamTrackEvent('addtrack',
+        {track: track}));
+  }
+
+  function removeTrackFromStreamAndFireEvent(track, stream) {
+    stream.removeTrack(track);
+    stream.dispatchEvent(new window.MediaStreamTrackEvent('removetrack',
+        {track: track}));
+  }
+
+  function fireAddTrack(pc, track, receiver, streams) {
+    var trackEvent = new Event('track');
+    trackEvent.track = track;
+    trackEvent.receiver = receiver;
+    trackEvent.transceiver = {receiver: receiver};
+    trackEvent.streams = streams;
+    window.setTimeout(function() {
+      pc._dispatchEvent('track', trackEvent);
+    });
+  }
+
+  var RTCPeerConnection = function(config) {
+    var pc = this;
+
+    var _eventTarget = document.createDocumentFragment();
+    ['addEventListener', 'removeEventListener', 'dispatchEvent']
+        .forEach(function(method) {
+          pc[method] = _eventTarget[method].bind(_eventTarget);
+        });
+
+    this.canTrickleIceCandidates = null;
+
+    this.needNegotiation = false;
+
+    this.localStreams = [];
+    this.remoteStreams = [];
+
+    this._localDescription = null;
+    this._remoteDescription = null;
+
+    this.signalingState = 'stable';
+    this.iceConnectionState = 'new';
+    this.connectionState = 'new';
+    this.iceGatheringState = 'new';
+
+    config = JSON.parse(JSON.stringify(config || {}));
+
+    this.usingBundle = config.bundlePolicy === 'max-bundle';
+    if (config.rtcpMuxPolicy === 'negotiate') {
+      throw(makeError('NotSupportedError',
+          'rtcpMuxPolicy \'negotiate\' is not supported'));
+    } else if (!config.rtcpMuxPolicy) {
+      config.rtcpMuxPolicy = 'require';
+    }
+
+    switch (config.iceTransportPolicy) {
+      case 'all':
+      case 'relay':
+        break;
+      default:
+        config.iceTransportPolicy = 'all';
+        break;
+    }
+
+    switch (config.bundlePolicy) {
+      case 'balanced':
+      case 'max-compat':
+      case 'max-bundle':
+        break;
+      default:
+        config.bundlePolicy = 'balanced';
+        break;
+    }
+
+    config.iceServers = filterIceServers(config.iceServers || [], edgeVersion);
+
+    this._iceGatherers = [];
+    if (config.iceCandidatePoolSize) {
+      for (var i = config.iceCandidatePoolSize; i > 0; i--) {
+        this._iceGatherers.push(new window.RTCIceGatherer({
+          iceServers: config.iceServers,
+          gatherPolicy: config.iceTransportPolicy
+        }));
+      }
+    } else {
+      config.iceCandidatePoolSize = 0;
+    }
+
+    this._config = config;
+
+    // per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
+    // everything that is needed to describe a SDP m-line.
+    this.transceivers = [];
+
+    this._sdpSessionId = SDPUtils.generateSessionId();
+    this._sdpSessionVersion = 0;
+
+    this._dtlsRole = undefined; // role for a=setup to use in answers.
+
+    this._isClosed = false;
+  };
+
+  Object.defineProperty(RTCPeerConnection.prototype, 'localDescription', {
+    configurable: true,
+    get: function() {
+      return this._localDescription;
+    }
+  });
+  Object.defineProperty(RTCPeerConnection.prototype, 'remoteDescription', {
+    configurable: true,
+    get: function() {
+      return this._remoteDescription;
+    }
+  });
+
+  // set up event handlers on prototype
+  RTCPeerConnection.prototype.onicecandidate = null;
+  RTCPeerConnection.prototype.onaddstream = null;
+  RTCPeerConnection.prototype.ontrack = null;
+  RTCPeerConnection.prototype.onremovestream = null;
+  RTCPeerConnection.prototype.onsignalingstatechange = null;
+  RTCPeerConnection.prototype.oniceconnectionstatechange = null;
+  RTCPeerConnection.prototype.onconnectionstatechange = null;
+  RTCPeerConnection.prototype.onicegatheringstatechange = null;
+  RTCPeerConnection.prototype.onnegotiationneeded = null;
+  RTCPeerConnection.prototype.ondatachannel = null;
+
+  RTCPeerConnection.prototype._dispatchEvent = function(name, event) {
+    if (this._isClosed) {
+      return;
+    }
+    this.dispatchEvent(event);
+    if (typeof this['on' + name] === 'function') {
+      this['on' + name](event);
+    }
+  };
+
+  RTCPeerConnection.prototype._emitGatheringStateChange = function() {
+    var event = new Event('icegatheringstatechange');
+    this._dispatchEvent('icegatheringstatechange', event);
+  };
+
+  RTCPeerConnection.prototype.getConfiguration = function() {
+    return this._config;
+  };
+
+  RTCPeerConnection.prototype.getLocalStreams = function() {
+    return this.localStreams;
+  };
+
+  RTCPeerConnection.prototype.getRemoteStreams = function() {
+    return this.remoteStreams;
+  };
+
+  // internal helper to create a transceiver object.
+  // (which is not yet the same as the WebRTC 1.0 transceiver)
+  RTCPeerConnection.prototype._createTransceiver = function(kind, doNotAdd) {
+    var hasBundleTransport = this.transceivers.length > 0;
+    var transceiver = {
+      track: null,
+      iceGatherer: null,
+      iceTransport: null,
+      dtlsTransport: null,
+      localCapabilities: null,
+      remoteCapabilities: null,
+      rtpSender: null,
+      rtpReceiver: null,
+      kind: kind,
+      mid: null,
+      sendEncodingParameters: null,
+      recvEncodingParameters: null,
+      stream: null,
+      associatedRemoteMediaStreams: [],
+      wantReceive: true
+    };
+    if (this.usingBundle && hasBundleTransport) {
+      transceiver.iceTransport = this.transceivers[0].iceTransport;
+      transceiver.dtlsTransport = this.transceivers[0].dtlsTransport;
+    } else {
+      var transports = this._createIceAndDtlsTransports();
+      transceiver.iceTransport = transports.iceTransport;
+      transceiver.dtlsTransport = transports.dtlsTransport;
+    }
+    if (!doNotAdd) {
+      this.transceivers.push(transceiver);
+    }
+    return transceiver;
+  };
+
+  RTCPeerConnection.prototype.addTrack = function(track, stream) {
+    if (this._isClosed) {
+      throw makeError('InvalidStateError',
+          'Attempted to call addTrack on a closed peerconnection.');
+    }
+
+    var alreadyExists = this.transceivers.find(function(s) {
+      return s.track === track;
+    });
+
+    if (alreadyExists) {
+      throw makeError('InvalidAccessError', 'Track already exists.');
+    }
+
+    var transceiver;
+    for (var i = 0; i < this.transceivers.length; i++) {
+      if (!this.transceivers[i].track &&
+          this.transceivers[i].kind === track.kind) {
+        transceiver = this.transceivers[i];
+      }
+    }
+    if (!transceiver) {
+      transceiver = this._createTransceiver(track.kind);
+    }
+
+    this._maybeFireNegotiationNeeded();
+
+    if (this.localStreams.indexOf(stream) === -1) {
+      this.localStreams.push(stream);
+    }
+
+    transceiver.track = track;
+    transceiver.stream = stream;
+    transceiver.rtpSender = new window.RTCRtpSender(track,
+        transceiver.dtlsTransport);
+    return transceiver.rtpSender;
+  };
+
+  RTCPeerConnection.prototype.addStream = function(stream) {
+    var pc = this;
+    if (edgeVersion >= 15025) {
+      stream.getTracks().forEach(function(track) {
+        pc.addTrack(track, stream);
+      });
+    } else {
+      // Clone is necessary for local demos mostly, attaching directly
+      // to two different senders does not work (build 10547).
+      // Fixed in 15025 (or earlier)
+      var clonedStream = stream.clone();
+      stream.getTracks().forEach(function(track, idx) {
+        var clonedTrack = clonedStream.getTracks()[idx];
+        track.addEventListener('enabled', function(event) {
+          clonedTrack.enabled = event.enabled;
+        });
+      });
+      clonedStream.getTracks().forEach(function(track) {
+        pc.addTrack(track, clonedStream);
+      });
+    }
+  };
+
+  RTCPeerConnection.prototype.removeTrack = function(sender) {
+    if (this._isClosed) {
+      throw makeError('InvalidStateError',
+          'Attempted to call removeTrack on a closed peerconnection.');
+    }
+
+    if (!(sender instanceof window.RTCRtpSender)) {
+      throw new TypeError('Argument 1 of RTCPeerConnection.removeTrack ' +
+          'does not implement interface RTCRtpSender.');
+    }
+
+    var transceiver = this.transceivers.find(function(t) {
+      return t.rtpSender === sender;
+    });
+
+    if (!transceiver) {
+      throw makeError('InvalidAccessError',
+          'Sender was not created by this connection.');
+    }
+    var stream = transceiver.stream;
+
+    transceiver.rtpSender.stop();
+    transceiver.rtpSender = null;
+    transceiver.track = null;
+    transceiver.stream = null;
+
+    // remove the stream from the set of local streams
+    var localStreams = this.transceivers.map(function(t) {
+      return t.stream;
+    });
+    if (localStreams.indexOf(stream) === -1 &&
+        this.localStreams.indexOf(stream) > -1) {
+      this.localStreams.splice(this.localStreams.indexOf(stream), 1);
+    }
+
+    this._maybeFireNegotiationNeeded();
+  };
+
+  RTCPeerConnection.prototype.removeStream = function(stream) {
+    var pc = this;
+    stream.getTracks().forEach(function(track) {
+      var sender = pc.getSenders().find(function(s) {
+        return s.track === track;
+      });
+      if (sender) {
+        pc.removeTrack(sender);
+      }
+    });
+  };
+
+  RTCPeerConnection.prototype.getSenders = function() {
+    return this.transceivers.filter(function(transceiver) {
+      return !!transceiver.rtpSender;
+    })
+    .map(function(transceiver) {
+      return transceiver.rtpSender;
+    });
+  };
+
+  RTCPeerConnection.prototype.getReceivers = function() {
+    return this.transceivers.filter(function(transceiver) {
+      return !!transceiver.rtpReceiver;
+    })
+    .map(function(transceiver) {
+      return transceiver.rtpReceiver;
+    });
+  };
+
+
+  RTCPeerConnection.prototype._createIceGatherer = function(sdpMLineIndex,
+      usingBundle) {
+    var pc = this;
+    if (usingBundle && sdpMLineIndex > 0) {
+      return this.transceivers[0].iceGatherer;
+    } else if (this._iceGatherers.length) {
+      return this._iceGatherers.shift();
+    }
+    var iceGatherer = new window.RTCIceGatherer({
+      iceServers: this._config.iceServers,
+      gatherPolicy: this._config.iceTransportPolicy
+    });
+    Object.defineProperty(iceGatherer, 'state',
+        {value: 'new', writable: true}
+    );
+
+    this.transceivers[sdpMLineIndex].bufferedCandidateEvents = [];
+    this.transceivers[sdpMLineIndex].bufferCandidates = function(event) {
+      var end = !event.candidate || Object.keys(event.candidate).length === 0;
+      // polyfill since RTCIceGatherer.state is not implemented in
+      // Edge 10547 yet.
+      iceGatherer.state = end ? 'completed' : 'gathering';
+      if (pc.transceivers[sdpMLineIndex].bufferedCandidateEvents !== null) {
+        pc.transceivers[sdpMLineIndex].bufferedCandidateEvents.push(event);
+      }
+    };
+    iceGatherer.addEventListener('localcandidate',
+      this.transceivers[sdpMLineIndex].bufferCandidates);
+    return iceGatherer;
+  };
+
+  // start gathering from an RTCIceGatherer.
+  RTCPeerConnection.prototype._gather = function(mid, sdpMLineIndex) {
+    var pc = this;
+    var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
+    if (iceGatherer.onlocalcandidate) {
+      return;
+    }
+    var bufferedCandidateEvents =
+      this.transceivers[sdpMLineIndex].bufferedCandidateEvents;
+    this.transceivers[sdpMLineIndex].bufferedCandidateEvents = null;
+    iceGatherer.removeEventListener('localcandidate',
+      this.transceivers[sdpMLineIndex].bufferCandidates);
+    iceGatherer.onlocalcandidate = function(evt) {
+      if (pc.usingBundle && sdpMLineIndex > 0) {
+        // if we know that we use bundle we can drop candidates with
+        // ѕdpMLineIndex > 0. If we don't do this then our state gets
+        // confused since we dispose the extra ice gatherer.
+        return;
+      }
+      var event = new Event('icecandidate');
+      event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};
+
+      var cand = evt.candidate;
+      // Edge emits an empty object for RTCIceCandidateComplete‥
+      var end = !cand || Object.keys(cand).length === 0;
+      if (end) {
+        // polyfill since RTCIceGatherer.state is not implemented in
+        // Edge 10547 yet.
+        if (iceGatherer.state === 'new' || iceGatherer.state === 'gathering') {
+          iceGatherer.state = 'completed';
+        }
+      } else {
+        if (iceGatherer.state === 'new') {
+          iceGatherer.state = 'gathering';
+        }
+        // RTCIceCandidate doesn't have a component, needs to be added
+        cand.component = 1;
+        // also the usernameFragment. TODO: update SDP to take both variants.
+        cand.ufrag = iceGatherer.getLocalParameters().usernameFragment;
+
+        var serializedCandidate = SDPUtils.writeCandidate(cand);
+        event.candidate = Object.assign(event.candidate,
+            SDPUtils.parseCandidate(serializedCandidate));
+
+        event.candidate.candidate = serializedCandidate;
+        event.candidate.toJSON = function() {
+          return {
+            candidate: event.candidate.candidate,
+            sdpMid: event.candidate.sdpMid,
+            sdpMLineIndex: event.candidate.sdpMLineIndex,
+            usernameFragment: event.candidate.usernameFragment
+          };
+        };
+      }
+
+      // update local description.
+      var sections = SDPUtils.getMediaSections(pc._localDescription.sdp);
+      if (!end) {
+        sections[event.candidate.sdpMLineIndex] +=
+            'a=' + event.candidate.candidate + '\r\n';
+      } else {
+        sections[event.candidate.sdpMLineIndex] +=
+            'a=end-of-candidates\r\n';
+      }
+      pc._localDescription.sdp =
+          SDPUtils.getDescription(pc._localDescription.sdp) +
+          sections.join('');
+      var complete = pc.transceivers.every(function(transceiver) {
+        return transceiver.iceGatherer &&
+            transceiver.iceGatherer.state === 'completed';
+      });
+
+      if (pc.iceGatheringState !== 'gathering') {
+        pc.iceGatheringState = 'gathering';
+        pc._emitGatheringStateChange();
+      }
+
+      // Emit candidate. Also emit null candidate when all gatherers are
+      // complete.
+      if (!end) {
+        pc._dispatchEvent('icecandidate', event);
+      }
+      if (complete) {
+        pc._dispatchEvent('icecandidate', new Event('icecandidate'));
+        pc.iceGatheringState = 'complete';
+        pc._emitGatheringStateChange();
+      }
+    };
+
+    // emit already gathered candidates.
+    window.setTimeout(function() {
+      bufferedCandidateEvents.forEach(function(e) {
+        iceGatherer.onlocalcandidate(e);
+      });
+    }, 0);
+  };
+
+  // Create ICE transport and DTLS transport.
+  RTCPeerConnection.prototype._createIceAndDtlsTransports = function() {
+    var pc = this;
+    var iceTransport = new window.RTCIceTransport(null);
+    iceTransport.onicestatechange = function() {
+      pc._updateIceConnectionState();
+      pc._updateConnectionState();
+    };
+
+    var dtlsTransport = new window.RTCDtlsTransport(iceTransport);
+    dtlsTransport.ondtlsstatechange = function() {
+      pc._updateConnectionState();
+    };
+    dtlsTransport.onerror = function() {
+      // onerror does not set state to failed by itself.
+      Object.defineProperty(dtlsTransport, 'state',
+          {value: 'failed', writable: true});
+      pc._updateConnectionState();
+    };
+
+    return {
+      iceTransport: iceTransport,
+      dtlsTransport: dtlsTransport
+    };
+  };
+
+  // Destroy ICE gatherer, ICE transport and DTLS transport.
+  // Without triggering the callbacks.
+  RTCPeerConnection.prototype._disposeIceAndDtlsTransports = function(
+      sdpMLineIndex) {
+    var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
+    if (iceGatherer) {
+      delete iceGatherer.onlocalcandidate;
+      delete this.transceivers[sdpMLineIndex].iceGatherer;
+    }
+    var iceTransport = this.transceivers[sdpMLineIndex].iceTransport;
+    if (iceTransport) {
+      delete iceTransport.onicestatechange;
+      delete this.transceivers[sdpMLineIndex].iceTransport;
+    }
+    var dtlsTransport = this.transceivers[sdpMLineIndex].dtlsTransport;
+    if (dtlsTransport) {
+      delete dtlsTransport.ondtlsstatechange;
+      delete dtlsTransport.onerror;
+      delete this.transceivers[sdpMLineIndex].dtlsTransport;
+    }
+  };
+
+  // Start the RTP Sender and Receiver for a transceiver.
+  RTCPeerConnection.prototype._transceive = function(transceiver,
+      send, recv) {
+    var params = getCommonCapabilities(transceiver.localCapabilities,
+        transceiver.remoteCapabilities);
+    if (send && transceiver.rtpSender) {
+      params.encodings = transceiver.sendEncodingParameters;
+      params.rtcp = {
+        cname: SDPUtils.localCName,
+        compound: transceiver.rtcpParameters.compound
+      };
+      if (transceiver.recvEncodingParameters.length) {
+        params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
+      }
+      transceiver.rtpSender.send(params);
+    }
+    if (recv && transceiver.rtpReceiver && params.codecs.length > 0) {
+      // remove RTX field in Edge 14942
+      if (transceiver.kind === 'video'
+          && transceiver.recvEncodingParameters
+          && edgeVersion < 15019) {
+        transceiver.recvEncodingParameters.forEach(function(p) {
+          delete p.rtx;
+        });
+      }
+      if (transceiver.recvEncodingParameters.length) {
+        params.encodings = transceiver.recvEncodingParameters;
+      } else {
+        params.encodings = [{}];
+      }
+      params.rtcp = {
+        compound: transceiver.rtcpParameters.compound
+      };
+      if (transceiver.rtcpParameters.cname) {
+        params.rtcp.cname = transceiver.rtcpParameters.cname;
+      }
+      if (transceiver.sendEncodingParameters.length) {
+        params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
+      }
+      transceiver.rtpReceiver.receive(params);
+    }
+  };
+
+  RTCPeerConnection.prototype.setLocalDescription = function(description) {
+    var pc = this;
+
+    // Note: pranswer is not supported.
+    if (['offer', 'answer'].indexOf(description.type) === -1) {
+      return Promise.reject(makeError('TypeError',
+          'Unsupported type "' + description.type + '"'));
+    }
+
+    if (!isActionAllowedInSignalingState('setLocalDescription',
+        description.type, pc.signalingState) || pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError',
+          'Can not set local ' + description.type +
+          ' in state ' + pc.signalingState));
+    }
+
+    var sections;
+    var sessionpart;
+    if (description.type === 'offer') {
+      // VERY limited support for SDP munging. Limited to:
+      // * changing the order of codecs
+      sections = SDPUtils.splitSections(description.sdp);
+      sessionpart = sections.shift();
+      sections.forEach(function(mediaSection, sdpMLineIndex) {
+        var caps = SDPUtils.parseRtpParameters(mediaSection);
+        pc.transceivers[sdpMLineIndex].localCapabilities = caps;
+      });
+
+      pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
+        pc._gather(transceiver.mid, sdpMLineIndex);
+      });
+    } else if (description.type === 'answer') {
+      sections = SDPUtils.splitSections(pc._remoteDescription.sdp);
+      sessionpart = sections.shift();
+      var isIceLite = SDPUtils.matchPrefix(sessionpart,
+          'a=ice-lite').length > 0;
+      sections.forEach(function(mediaSection, sdpMLineIndex) {
+        var transceiver = pc.transceivers[sdpMLineIndex];
+        var iceGatherer = transceiver.iceGatherer;
+        var iceTransport = transceiver.iceTransport;
+        var dtlsTransport = transceiver.dtlsTransport;
+        var localCapabilities = transceiver.localCapabilities;
+        var remoteCapabilities = transceiver.remoteCapabilities;
+
+        // treat bundle-only as not-rejected.
+        var rejected = SDPUtils.isRejected(mediaSection) &&
+            SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
+
+        if (!rejected && !transceiver.rejected) {
+          var remoteIceParameters = SDPUtils.getIceParameters(
+              mediaSection, sessionpart);
+          var remoteDtlsParameters = SDPUtils.getDtlsParameters(
+              mediaSection, sessionpart);
+          if (isIceLite) {
+            remoteDtlsParameters.role = 'server';
+          }
+
+          if (!pc.usingBundle || sdpMLineIndex === 0) {
+            pc._gather(transceiver.mid, sdpMLineIndex);
+            if (iceTransport.state === 'new') {
+              iceTransport.start(iceGatherer, remoteIceParameters,
+                  isIceLite ? 'controlling' : 'controlled');
+            }
+            if (dtlsTransport.state === 'new') {
+              dtlsTransport.start(remoteDtlsParameters);
+            }
+          }
+
+          // Calculate intersection of capabilities.
+          var params = getCommonCapabilities(localCapabilities,
+              remoteCapabilities);
+
+          // Start the RTCRtpSender. The RTCRtpReceiver for this
+          // transceiver has already been started in setRemoteDescription.
+          pc._transceive(transceiver,
+              params.codecs.length > 0,
+              false);
+        }
+      });
+    }
+
+    pc._localDescription = {
+      type: description.type,
+      sdp: description.sdp
+    };
+    if (description.type === 'offer') {
+      pc._updateSignalingState('have-local-offer');
+    } else {
+      pc._updateSignalingState('stable');
+    }
+
+    return Promise.resolve();
+  };
+
+  RTCPeerConnection.prototype.setRemoteDescription = function(description) {
+    var pc = this;
+
+    // Note: pranswer is not supported.
+    if (['offer', 'answer'].indexOf(description.type) === -1) {
+      return Promise.reject(makeError('TypeError',
+          'Unsupported type "' + description.type + '"'));
+    }
+
+    if (!isActionAllowedInSignalingState('setRemoteDescription',
+        description.type, pc.signalingState) || pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError',
+          'Can not set remote ' + description.type +
+          ' in state ' + pc.signalingState));
+    }
+
+    var streams = {};
+    pc.remoteStreams.forEach(function(stream) {
+      streams[stream.id] = stream;
+    });
+    var receiverList = [];
+    var sections = SDPUtils.splitSections(description.sdp);
+    var sessionpart = sections.shift();
+    var isIceLite = SDPUtils.matchPrefix(sessionpart,
+        'a=ice-lite').length > 0;
+    var usingBundle = SDPUtils.matchPrefix(sessionpart,
+        'a=group:BUNDLE ').length > 0;
+    pc.usingBundle = usingBundle;
+    var iceOptions = SDPUtils.matchPrefix(sessionpart,
+        'a=ice-options:')[0];
+    if (iceOptions) {
+      pc.canTrickleIceCandidates = iceOptions.substr(14).split(' ')
+          .indexOf('trickle') >= 0;
+    } else {
+      pc.canTrickleIceCandidates = false;
+    }
+
+    sections.forEach(function(mediaSection, sdpMLineIndex) {
+      var lines = SDPUtils.splitLines(mediaSection);
+      var kind = SDPUtils.getKind(mediaSection);
+      // treat bundle-only as not-rejected.
+      var rejected = SDPUtils.isRejected(mediaSection) &&
+          SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
+      var protocol = lines[0].substr(2).split(' ')[2];
+
+      var direction = SDPUtils.getDirection(mediaSection, sessionpart);
+      var remoteMsid = SDPUtils.parseMsid(mediaSection);
+
+      var mid = SDPUtils.getMid(mediaSection) || SDPUtils.generateIdentifier();
+
+      // Reject datachannels which are not implemented yet.
+      if (rejected || (kind === 'application' && (protocol === 'DTLS/SCTP' ||
+          protocol === 'UDP/DTLS/SCTP'))) {
+        // TODO: this is dangerous in the case where a non-rejected m-line
+        //     becomes rejected.
+        pc.transceivers[sdpMLineIndex] = {
+          mid: mid,
+          kind: kind,
+          protocol: protocol,
+          rejected: true
+        };
+        return;
+      }
+
+      if (!rejected && pc.transceivers[sdpMLineIndex] &&
+          pc.transceivers[sdpMLineIndex].rejected) {
+        // recycle a rejected transceiver.
+        pc.transceivers[sdpMLineIndex] = pc._createTransceiver(kind, true);
+      }
+
+      var transceiver;
+      var iceGatherer;
+      var iceTransport;
+      var dtlsTransport;
+      var rtpReceiver;
+      var sendEncodingParameters;
+      var recvEncodingParameters;
+      var localCapabilities;
+
+      var track;
+      // FIXME: ensure the mediaSection has rtcp-mux set.
+      var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
+      var remoteIceParameters;
+      var remoteDtlsParameters;
+      if (!rejected) {
+        remoteIceParameters = SDPUtils.getIceParameters(mediaSection,
+            sessionpart);
+        remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection,
+            sessionpart);
+        remoteDtlsParameters.role = 'client';
+      }
+      recvEncodingParameters =
+          SDPUtils.parseRtpEncodingParameters(mediaSection);
+
+      var rtcpParameters = SDPUtils.parseRtcpParameters(mediaSection);
+
+      var isComplete = SDPUtils.matchPrefix(mediaSection,
+          'a=end-of-candidates', sessionpart).length > 0;
+      var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
+          .map(function(cand) {
+            return SDPUtils.parseCandidate(cand);
+          })
+          .filter(function(cand) {
+            return cand.component === 1;
+          });
+
+      // Check if we can use BUNDLE and dispose transports.
+      if ((description.type === 'offer' || description.type === 'answer') &&
+          !rejected && usingBundle && sdpMLineIndex > 0 &&
+          pc.transceivers[sdpMLineIndex]) {
+        pc._disposeIceAndDtlsTransports(sdpMLineIndex);
+        pc.transceivers[sdpMLineIndex].iceGatherer =
+            pc.transceivers[0].iceGatherer;
+        pc.transceivers[sdpMLineIndex].iceTransport =
+            pc.transceivers[0].iceTransport;
+        pc.transceivers[sdpMLineIndex].dtlsTransport =
+            pc.transceivers[0].dtlsTransport;
+        if (pc.transceivers[sdpMLineIndex].rtpSender) {
+          pc.transceivers[sdpMLineIndex].rtpSender.setTransport(
+              pc.transceivers[0].dtlsTransport);
+        }
+        if (pc.transceivers[sdpMLineIndex].rtpReceiver) {
+          pc.transceivers[sdpMLineIndex].rtpReceiver.setTransport(
+              pc.transceivers[0].dtlsTransport);
+        }
+      }
+      if (description.type === 'offer' && !rejected) {
+        transceiver = pc.transceivers[sdpMLineIndex] ||
+            pc._createTransceiver(kind);
+        transceiver.mid = mid;
+
+        if (!transceiver.iceGatherer) {
+          transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex,
+              usingBundle);
+        }
+
+        if (cands.length && transceiver.iceTransport.state === 'new') {
+          if (isComplete && (!usingBundle || sdpMLineIndex === 0)) {
+            transceiver.iceTransport.setRemoteCandidates(cands);
+          } else {
+            cands.forEach(function(candidate) {
+              maybeAddCandidate(transceiver.iceTransport, candidate);
+            });
+          }
+        }
+
+        localCapabilities = window.RTCRtpReceiver.getCapabilities(kind);
+
+        // filter RTX until additional stuff needed for RTX is implemented
+        // in adapter.js
+        if (edgeVersion < 15019) {
+          localCapabilities.codecs = localCapabilities.codecs.filter(
+              function(codec) {
+                return codec.name !== 'rtx';
+              });
+        }
+
+        sendEncodingParameters = transceiver.sendEncodingParameters || [{
+          ssrc: (2 * sdpMLineIndex + 2) * 1001
+        }];
+
+        // TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
+        var isNewTrack = false;
+        if (direction === 'sendrecv' || direction === 'sendonly') {
+          isNewTrack = !transceiver.rtpReceiver;
+          rtpReceiver = transceiver.rtpReceiver ||
+              new window.RTCRtpReceiver(transceiver.dtlsTransport, kind);
+
+          if (isNewTrack) {
+            var stream;
+            track = rtpReceiver.track;
+            // FIXME: does not work with Plan B.
+            if (remoteMsid && remoteMsid.stream === '-') {
+              // no-op. a stream id of '-' means: no associated stream.
+            } else if (remoteMsid) {
+              if (!streams[remoteMsid.stream]) {
+                streams[remoteMsid.stream] = new window.MediaStream();
+                Object.defineProperty(streams[remoteMsid.stream], 'id', {
+                  get: function() {
+                    return remoteMsid.stream;
+                  }
+                });
+              }
+              Object.defineProperty(track, 'id', {
+                get: function() {
+                  return remoteMsid.track;
+                }
+              });
+              stream = streams[remoteMsid.stream];
+            } else {
+              if (!streams.default) {
+                streams.default = new window.MediaStream();
+              }
+              stream = streams.default;
+            }
+            if (stream) {
+              addTrackToStreamAndFireEvent(track, stream);
+              transceiver.associatedRemoteMediaStreams.push(stream);
+            }
+            receiverList.push([track, rtpReceiver, stream]);
+          }
+        } else if (transceiver.rtpReceiver && transceiver.rtpReceiver.track) {
+          transceiver.associatedRemoteMediaStreams.forEach(function(s) {
+            var nativeTrack = s.getTracks().find(function(t) {
+              return t.id === transceiver.rtpReceiver.track.id;
+            });
+            if (nativeTrack) {
+              removeTrackFromStreamAndFireEvent(nativeTrack, s);
+            }
+          });
+          transceiver.associatedRemoteMediaStreams = [];
+        }
+
+        transceiver.localCapabilities = localCapabilities;
+        transceiver.remoteCapabilities = remoteCapabilities;
+        transceiver.rtpReceiver = rtpReceiver;
+        transceiver.rtcpParameters = rtcpParameters;
+        transceiver.sendEncodingParameters = sendEncodingParameters;
+        transceiver.recvEncodingParameters = recvEncodingParameters;
+
+        // Start the RTCRtpReceiver now. The RTPSender is started in
+        // setLocalDescription.
+        pc._transceive(pc.transceivers[sdpMLineIndex],
+            false,
+            isNewTrack);
+      } else if (description.type === 'answer' && !rejected) {
+        transceiver = pc.transceivers[sdpMLineIndex];
+        iceGatherer = transceiver.iceGatherer;
+        iceTransport = transceiver.iceTransport;
+        dtlsTransport = transceiver.dtlsTransport;
+        rtpReceiver = transceiver.rtpReceiver;
+        sendEncodingParameters = transceiver.sendEncodingParameters;
+        localCapabilities = transceiver.localCapabilities;
+
+        pc.transceivers[sdpMLineIndex].recvEncodingParameters =
+            recvEncodingParameters;
+        pc.transceivers[sdpMLineIndex].remoteCapabilities =
+            remoteCapabilities;
+        pc.transceivers[sdpMLineIndex].rtcpParameters = rtcpParameters;
+
+        if (cands.length && iceTransport.state === 'new') {
+          if ((isIceLite || isComplete) &&
+              (!usingBundle || sdpMLineIndex === 0)) {
+            iceTransport.setRemoteCandidates(cands);
+          } else {
+            cands.forEach(function(candidate) {
+              maybeAddCandidate(transceiver.iceTransport, candidate);
+            });
+          }
+        }
+
+        if (!usingBundle || sdpMLineIndex === 0) {
+          if (iceTransport.state === 'new') {
+            iceTransport.start(iceGatherer, remoteIceParameters,
+                'controlling');
+          }
+          if (dtlsTransport.state === 'new') {
+            dtlsTransport.start(remoteDtlsParameters);
+          }
+        }
+
+        // If the offer contained RTX but the answer did not,
+        // remove RTX from sendEncodingParameters.
+        var commonCapabilities = getCommonCapabilities(
+          transceiver.localCapabilities,
+          transceiver.remoteCapabilities);
+
+        var hasRtx = commonCapabilities.codecs.filter(function(c) {
+          return c.name.toLowerCase() === 'rtx';
+        }).length;
+        if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
+          delete transceiver.sendEncodingParameters[0].rtx;
+        }
+
+        pc._transceive(transceiver,
+            direction === 'sendrecv' || direction === 'recvonly',
+            direction === 'sendrecv' || direction === 'sendonly');
+
+        // TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
+        if (rtpReceiver &&
+            (direction === 'sendrecv' || direction === 'sendonly')) {
+          track = rtpReceiver.track;
+          if (remoteMsid) {
+            if (!streams[remoteMsid.stream]) {
+              streams[remoteMsid.stream] = new window.MediaStream();
+            }
+            addTrackToStreamAndFireEvent(track, streams[remoteMsid.stream]);
+            receiverList.push([track, rtpReceiver, streams[remoteMsid.stream]]);
+          } else {
+            if (!streams.default) {
+              streams.default = new window.MediaStream();
+            }
+            addTrackToStreamAndFireEvent(track, streams.default);
+            receiverList.push([track, rtpReceiver, streams.default]);
+          }
+        } else {
+          // FIXME: actually the receiver should be created later.
+          delete transceiver.rtpReceiver;
+        }
+      }
+    });
+
+    if (pc._dtlsRole === undefined) {
+      pc._dtlsRole = description.type === 'offer' ? 'active' : 'passive';
+    }
+
+    pc._remoteDescription = {
+      type: description.type,
+      sdp: description.sdp
+    };
+    if (description.type === 'offer') {
+      pc._updateSignalingState('have-remote-offer');
+    } else {
+      pc._updateSignalingState('stable');
+    }
+    Object.keys(streams).forEach(function(sid) {
+      var stream = streams[sid];
+      if (stream.getTracks().length) {
+        if (pc.remoteStreams.indexOf(stream) === -1) {
+          pc.remoteStreams.push(stream);
+          var event = new Event('addstream');
+          event.stream = stream;
+          window.setTimeout(function() {
+            pc._dispatchEvent('addstream', event);
+          });
+        }
+
+        receiverList.forEach(function(item) {
+          var track = item[0];
+          var receiver = item[1];
+          if (stream.id !== item[2].id) {
+            return;
+          }
+          fireAddTrack(pc, track, receiver, [stream]);
+        });
+      }
+    });
+    receiverList.forEach(function(item) {
+      if (item[2]) {
+        return;
+      }
+      fireAddTrack(pc, item[0], item[1], []);
+    });
+
+    // check whether addIceCandidate({}) was called within four seconds after
+    // setRemoteDescription.
+    window.setTimeout(function() {
+      if (!(pc && pc.transceivers)) {
+        return;
+      }
+      pc.transceivers.forEach(function(transceiver) {
+        if (transceiver.iceTransport &&
+            transceiver.iceTransport.state === 'new' &&
+            transceiver.iceTransport.getRemoteCandidates().length > 0) {
+          console.warn('Timeout for addRemoteCandidate. Consider sending ' +
+              'an end-of-candidates notification');
+          transceiver.iceTransport.addRemoteCandidate({});
+        }
+      });
+    }, 4000);
+
+    return Promise.resolve();
+  };
+
+  RTCPeerConnection.prototype.close = function() {
+    this.transceivers.forEach(function(transceiver) {
+      /* not yet
+      if (transceiver.iceGatherer) {
+        transceiver.iceGatherer.close();
+      }
+      */
+      if (transceiver.iceTransport) {
+        transceiver.iceTransport.stop();
+      }
+      if (transceiver.dtlsTransport) {
+        transceiver.dtlsTransport.stop();
+      }
+      if (transceiver.rtpSender) {
+        transceiver.rtpSender.stop();
+      }
+      if (transceiver.rtpReceiver) {
+        transceiver.rtpReceiver.stop();
+      }
+    });
+    // FIXME: clean up tracks, local streams, remote streams, etc
+    this._isClosed = true;
+    this._updateSignalingState('closed');
+  };
+
+  // Update the signaling state.
+  RTCPeerConnection.prototype._updateSignalingState = function(newState) {
+    this.signalingState = newState;
+    var event = new Event('signalingstatechange');
+    this._dispatchEvent('signalingstatechange', event);
+  };
+
+  // Determine whether to fire the negotiationneeded event.
+  RTCPeerConnection.prototype._maybeFireNegotiationNeeded = function() {
+    var pc = this;
+    if (this.signalingState !== 'stable' || this.needNegotiation === true) {
+      return;
+    }
+    this.needNegotiation = true;
+    window.setTimeout(function() {
+      if (pc.needNegotiation) {
+        pc.needNegotiation = false;
+        var event = new Event('negotiationneeded');
+        pc._dispatchEvent('negotiationneeded', event);
+      }
+    }, 0);
+  };
+
+  // Update the ice connection state.
+  RTCPeerConnection.prototype._updateIceConnectionState = function() {
+    var newState;
+    var states = {
+      'new': 0,
+      closed: 0,
+      checking: 0,
+      connected: 0,
+      completed: 0,
+      disconnected: 0,
+      failed: 0
+    };
+    this.transceivers.forEach(function(transceiver) {
+      if (transceiver.iceTransport && !transceiver.rejected) {
+        states[transceiver.iceTransport.state]++;
+      }
+    });
+
+    newState = 'new';
+    if (states.failed > 0) {
+      newState = 'failed';
+    } else if (states.checking > 0) {
+      newState = 'checking';
+    } else if (states.disconnected > 0) {
+      newState = 'disconnected';
+    } else if (states.new > 0) {
+      newState = 'new';
+    } else if (states.connected > 0) {
+      newState = 'connected';
+    } else if (states.completed > 0) {
+      newState = 'completed';
+    }
+
+    if (newState !== this.iceConnectionState) {
+      this.iceConnectionState = newState;
+      var event = new Event('iceconnectionstatechange');
+      this._dispatchEvent('iceconnectionstatechange', event);
+    }
+  };
+
+  // Update the connection state.
+  RTCPeerConnection.prototype._updateConnectionState = function() {
+    var newState;
+    var states = {
+      'new': 0,
+      closed: 0,
+      connecting: 0,
+      connected: 0,
+      completed: 0,
+      disconnected: 0,
+      failed: 0
+    };
+    this.transceivers.forEach(function(transceiver) {
+      if (transceiver.iceTransport && transceiver.dtlsTransport &&
+          !transceiver.rejected) {
+        states[transceiver.iceTransport.state]++;
+        states[transceiver.dtlsTransport.state]++;
+      }
+    });
+    // ICETransport.completed and connected are the same for this purpose.
+    states.connected += states.completed;
+
+    newState = 'new';
+    if (states.failed > 0) {
+      newState = 'failed';
+    } else if (states.connecting > 0) {
+      newState = 'connecting';
+    } else if (states.disconnected > 0) {
+      newState = 'disconnected';
+    } else if (states.new > 0) {
+      newState = 'new';
+    } else if (states.connected > 0) {
+      newState = 'connected';
+    }
+
+    if (newState !== this.connectionState) {
+      this.connectionState = newState;
+      var event = new Event('connectionstatechange');
+      this._dispatchEvent('connectionstatechange', event);
+    }
+  };
+
+  RTCPeerConnection.prototype.createOffer = function() {
+    var pc = this;
+
+    if (pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError',
+          'Can not call createOffer after close'));
+    }
+
+    var numAudioTracks = pc.transceivers.filter(function(t) {
+      return t.kind === 'audio';
+    }).length;
+    var numVideoTracks = pc.transceivers.filter(function(t) {
+      return t.kind === 'video';
+    }).length;
+
+    // Determine number of audio and video tracks we need to send/recv.
+    var offerOptions = arguments[0];
+    if (offerOptions) {
+      // Reject Chrome legacy constraints.
+      if (offerOptions.mandatory || offerOptions.optional) {
+        throw new TypeError(
+            'Legacy mandatory/optional constraints not supported.');
+      }
+      if (offerOptions.offerToReceiveAudio !== undefined) {
+        if (offerOptions.offerToReceiveAudio === true) {
+          numAudioTracks = 1;
+        } else if (offerOptions.offerToReceiveAudio === false) {
+          numAudioTracks = 0;
+        } else {
+          numAudioTracks = offerOptions.offerToReceiveAudio;
+        }
+      }
+      if (offerOptions.offerToReceiveVideo !== undefined) {
+        if (offerOptions.offerToReceiveVideo === true) {
+          numVideoTracks = 1;
+        } else if (offerOptions.offerToReceiveVideo === false) {
+          numVideoTracks = 0;
+        } else {
+          numVideoTracks = offerOptions.offerToReceiveVideo;
+        }
+      }
+    }
+
+    pc.transceivers.forEach(function(transceiver) {
+      if (transceiver.kind === 'audio') {
+        numAudioTracks--;
+        if (numAudioTracks < 0) {
+          transceiver.wantReceive = false;
+        }
+      } else if (transceiver.kind === 'video') {
+        numVideoTracks--;
+        if (numVideoTracks < 0) {
+          transceiver.wantReceive = false;
+        }
+      }
+    });
+
+    // Create M-lines for recvonly streams.
+    while (numAudioTracks > 0 || numVideoTracks > 0) {
+      if (numAudioTracks > 0) {
+        pc._createTransceiver('audio');
+        numAudioTracks--;
+      }
+      if (numVideoTracks > 0) {
+        pc._createTransceiver('video');
+        numVideoTracks--;
+      }
+    }
+
+    var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId,
+        pc._sdpSessionVersion++);
+    pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
+      // For each track, create an ice gatherer, ice transport,
+      // dtls transport, potentially rtpsender and rtpreceiver.
+      var track = transceiver.track;
+      var kind = transceiver.kind;
+      var mid = transceiver.mid || SDPUtils.generateIdentifier();
+      transceiver.mid = mid;
+
+      if (!transceiver.iceGatherer) {
+        transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex,
+            pc.usingBundle);
+      }
+
+      var localCapabilities = window.RTCRtpSender.getCapabilities(kind);
+      // filter RTX until additional stuff needed for RTX is implemented
+      // in adapter.js
+      if (edgeVersion < 15019) {
+        localCapabilities.codecs = localCapabilities.codecs.filter(
+            function(codec) {
+              return codec.name !== 'rtx';
+            });
+      }
+      localCapabilities.codecs.forEach(function(codec) {
+        // work around https://bugs.chromium.org/p/webrtc/issues/detail?id=6552
+        // by adding level-asymmetry-allowed=1
+        if (codec.name === 'H264' &&
+            codec.parameters['level-asymmetry-allowed'] === undefined) {
+          codec.parameters['level-asymmetry-allowed'] = '1';
+        }
+
+        // for subsequent offers, we might have to re-use the payload
+        // type of the last offer.
+        if (transceiver.remoteCapabilities &&
+            transceiver.remoteCapabilities.codecs) {
+          transceiver.remoteCapabilities.codecs.forEach(function(remoteCodec) {
+            if (codec.name.toLowerCase() === remoteCodec.name.toLowerCase() &&
+                codec.clockRate === remoteCodec.clockRate) {
+              codec.preferredPayloadType = remoteCodec.payloadType;
+            }
+          });
+        }
+      });
+      localCapabilities.headerExtensions.forEach(function(hdrExt) {
+        var remoteExtensions = transceiver.remoteCapabilities &&
+            transceiver.remoteCapabilities.headerExtensions || [];
+        remoteExtensions.forEach(function(rHdrExt) {
+          if (hdrExt.uri === rHdrExt.uri) {
+            hdrExt.id = rHdrExt.id;
+          }
+        });
+      });
+
+      // generate an ssrc now, to be used later in rtpSender.send
+      var sendEncodingParameters = transceiver.sendEncodingParameters || [{
+        ssrc: (2 * sdpMLineIndex + 1) * 1001
+      }];
+      if (track) {
+        // add RTX
+        if (edgeVersion >= 15019 && kind === 'video' &&
+            !sendEncodingParameters[0].rtx) {
+          sendEncodingParameters[0].rtx = {
+            ssrc: sendEncodingParameters[0].ssrc + 1
+          };
+        }
+      }
+
+      if (transceiver.wantReceive) {
+        transceiver.rtpReceiver = new window.RTCRtpReceiver(
+            transceiver.dtlsTransport, kind);
+      }
+
+      transceiver.localCapabilities = localCapabilities;
+      transceiver.sendEncodingParameters = sendEncodingParameters;
+    });
+
+    // always offer BUNDLE and dispose on return if not supported.
+    if (pc._config.bundlePolicy !== 'max-compat') {
+      sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function(t) {
+        return t.mid;
+      }).join(' ') + '\r\n';
+    }
+    sdp += 'a=ice-options:trickle\r\n';
+
+    pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
+      sdp += writeMediaSection(transceiver, transceiver.localCapabilities,
+          'offer', transceiver.stream, pc._dtlsRole);
+      sdp += 'a=rtcp-rsize\r\n';
+
+      if (transceiver.iceGatherer && pc.iceGatheringState !== 'new' &&
+          (sdpMLineIndex === 0 || !pc.usingBundle)) {
+        transceiver.iceGatherer.getLocalCandidates().forEach(function(cand) {
+          cand.component = 1;
+          sdp += 'a=' + SDPUtils.writeCandidate(cand) + '\r\n';
+        });
+
+        if (transceiver.iceGatherer.state === 'completed') {
+          sdp += 'a=end-of-candidates\r\n';
+        }
+      }
+    });
+
+    var desc = new window.RTCSessionDescription({
+      type: 'offer',
+      sdp: sdp
+    });
+    return Promise.resolve(desc);
+  };
+
+  RTCPeerConnection.prototype.createAnswer = function() {
+    var pc = this;
+
+    if (pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError',
+          'Can not call createAnswer after close'));
+    }
+
+    if (!(pc.signalingState === 'have-remote-offer' ||
+        pc.signalingState === 'have-local-pranswer')) {
+      return Promise.reject(makeError('InvalidStateError',
+          'Can not call createAnswer in signalingState ' + pc.signalingState));
+    }
+
+    var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId,
+        pc._sdpSessionVersion++);
+    if (pc.usingBundle) {
+      sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function(t) {
+        return t.mid;
+      }).join(' ') + '\r\n';
+    }
+    sdp += 'a=ice-options:trickle\r\n';
+
+    var mediaSectionsInOffer = SDPUtils.getMediaSections(
+        pc._remoteDescription.sdp).length;
+    pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
+      if (sdpMLineIndex + 1 > mediaSectionsInOffer) {
+        return;
+      }
+      if (transceiver.rejected) {
+        if (transceiver.kind === 'application') {
+          if (transceiver.protocol === 'DTLS/SCTP') { // legacy fmt
+            sdp += 'm=application 0 DTLS/SCTP 5000\r\n';
+          } else {
+            sdp += 'm=application 0 ' + transceiver.protocol +
+                ' webrtc-datachannel\r\n';
+          }
+        } else if (transceiver.kind === 'audio') {
+          sdp += 'm=audio 0 UDP/TLS/RTP/SAVPF 0\r\n' +
+              'a=rtpmap:0 PCMU/8000\r\n';
+        } else if (transceiver.kind === 'video') {
+          sdp += 'm=video 0 UDP/TLS/RTP/SAVPF 120\r\n' +
+              'a=rtpmap:120 VP8/90000\r\n';
+        }
+        sdp += 'c=IN IP4 0.0.0.0\r\n' +
+            'a=inactive\r\n' +
+            'a=mid:' + transceiver.mid + '\r\n';
+        return;
+      }
+
+      // FIXME: look at direction.
+      if (transceiver.stream) {
+        var localTrack;
+        if (transceiver.kind === 'audio') {
+          localTrack = transceiver.stream.getAudioTracks()[0];
+        } else if (transceiver.kind === 'video') {
+          localTrack = transceiver.stream.getVideoTracks()[0];
+        }
+        if (localTrack) {
+          // add RTX
+          if (edgeVersion >= 15019 && transceiver.kind === 'video' &&
+              !transceiver.sendEncodingParameters[0].rtx) {
+            transceiver.sendEncodingParameters[0].rtx = {
+              ssrc: transceiver.sendEncodingParameters[0].ssrc + 1
+            };
+          }
+        }
+      }
+
+      // Calculate intersection of capabilities.
+      var commonCapabilities = getCommonCapabilities(
+          transceiver.localCapabilities,
+          transceiver.remoteCapabilities);
+
+      var hasRtx = commonCapabilities.codecs.filter(function(c) {
+        return c.name.toLowerCase() === 'rtx';
+      }).length;
+      if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
+        delete transceiver.sendEncodingParameters[0].rtx;
+      }
+
+      sdp += writeMediaSection(transceiver, commonCapabilities,
+          'answer', transceiver.stream, pc._dtlsRole);
+      if (transceiver.rtcpParameters &&
+          transceiver.rtcpParameters.reducedSize) {
+        sdp += 'a=rtcp-rsize\r\n';
+      }
+    });
+
+    var desc = new window.RTCSessionDescription({
+      type: 'answer',
+      sdp: sdp
+    });
+    return Promise.resolve(desc);
+  };
+
+  RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
+    var pc = this;
+    var sections;
+    if (candidate && !(candidate.sdpMLineIndex !== undefined ||
+        candidate.sdpMid)) {
+      return Promise.reject(new TypeError('sdpMLineIndex or sdpMid required'));
+    }
+
+    // TODO: needs to go into ops queue.
+    return new Promise(function(resolve, reject) {
+      if (!pc._remoteDescription) {
+        return reject(makeError('InvalidStateError',
+            'Can not add ICE candidate without a remote description'));
+      } else if (!candidate || candidate.candidate === '') {
+        for (var j = 0; j < pc.transceivers.length; j++) {
+          if (pc.transceivers[j].rejected) {
+            continue;
+          }
+          pc.transceivers[j].iceTransport.addRemoteCandidate({});
+          sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
+          sections[j] += 'a=end-of-candidates\r\n';
+          pc._remoteDescription.sdp =
+              SDPUtils.getDescription(pc._remoteDescription.sdp) +
+              sections.join('');
+          if (pc.usingBundle) {
+            break;
+          }
+        }
+      } else {
+        var sdpMLineIndex = candidate.sdpMLineIndex;
+        if (candidate.sdpMid) {
+          for (var i = 0; i < pc.transceivers.length; i++) {
+            if (pc.transceivers[i].mid === candidate.sdpMid) {
+              sdpMLineIndex = i;
+              break;
+            }
+          }
+        }
+        var transceiver = pc.transceivers[sdpMLineIndex];
+        if (transceiver) {
+          if (transceiver.rejected) {
+            return resolve();
+          }
+          var cand = Object.keys(candidate.candidate).length > 0 ?
+              SDPUtils.parseCandidate(candidate.candidate) : {};
+          // Ignore Chrome's invalid candidates since Edge does not like them.
+          if (cand.protocol === 'tcp' && (cand.port === 0 || cand.port === 9)) {
+            return resolve();
+          }
+          // Ignore RTCP candidates, we assume RTCP-MUX.
+          if (cand.component && cand.component !== 1) {
+            return resolve();
+          }
+          // when using bundle, avoid adding candidates to the wrong
+          // ice transport. And avoid adding candidates added in the SDP.
+          if (sdpMLineIndex === 0 || (sdpMLineIndex > 0 &&
+              transceiver.iceTransport !== pc.transceivers[0].iceTransport)) {
+            if (!maybeAddCandidate(transceiver.iceTransport, cand)) {
+              return reject(makeError('OperationError',
+                  'Can not add ICE candidate'));
+            }
+          }
+
+          // update the remoteDescription.
+          var candidateString = candidate.candidate.trim();
+          if (candidateString.indexOf('a=') === 0) {
+            candidateString = candidateString.substr(2);
+          }
+          sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
+          sections[sdpMLineIndex] += 'a=' +
+              (cand.type ? candidateString : 'end-of-candidates')
+              + '\r\n';
+          pc._remoteDescription.sdp =
+              SDPUtils.getDescription(pc._remoteDescription.sdp) +
+              sections.join('');
+        } else {
+          return reject(makeError('OperationError',
+              'Can not add ICE candidate'));
+        }
+      }
+      resolve();
+    });
+  };
+
+  RTCPeerConnection.prototype.getStats = function(selector) {
+    if (selector && selector instanceof window.MediaStreamTrack) {
+      var senderOrReceiver = null;
+      this.transceivers.forEach(function(transceiver) {
+        if (transceiver.rtpSender &&
+            transceiver.rtpSender.track === selector) {
+          senderOrReceiver = transceiver.rtpSender;
+        } else if (transceiver.rtpReceiver &&
+            transceiver.rtpReceiver.track === selector) {
+          senderOrReceiver = transceiver.rtpReceiver;
+        }
+      });
+      if (!senderOrReceiver) {
+        throw makeError('InvalidAccessError', 'Invalid selector.');
+      }
+      return senderOrReceiver.getStats();
+    }
+
+    var promises = [];
+    this.transceivers.forEach(function(transceiver) {
+      ['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport',
+          'dtlsTransport'].forEach(function(method) {
+            if (transceiver[method]) {
+              promises.push(transceiver[method].getStats());
+            }
+          });
+    });
+    return Promise.all(promises).then(function(allStats) {
+      var results = new Map();
+      allStats.forEach(function(stats) {
+        stats.forEach(function(stat) {
+          results.set(stat.id, stat);
+        });
+      });
+      return results;
+    });
+  };
+
+  // fix low-level stat names and return Map instead of object.
+  var ortcObjects = ['RTCRtpSender', 'RTCRtpReceiver', 'RTCIceGatherer',
+    'RTCIceTransport', 'RTCDtlsTransport'];
+  ortcObjects.forEach(function(ortcObjectName) {
+    var obj = window[ortcObjectName];
+    if (obj && obj.prototype && obj.prototype.getStats) {
+      var nativeGetstats = obj.prototype.getStats;
+      obj.prototype.getStats = function() {
+        return nativeGetstats.apply(this)
+        .then(function(nativeStats) {
+          var mapStats = new Map();
+          Object.keys(nativeStats).forEach(function(id) {
+            nativeStats[id].type = fixStatsType(nativeStats[id]);
+            mapStats.set(id, nativeStats[id]);
+          });
+          return mapStats;
+        });
+      };
+    }
+  });
+
+  // legacy callback shims. Should be moved to adapter.js some days.
+  var methods = ['createOffer', 'createAnswer'];
+  methods.forEach(function(method) {
+    var nativeMethod = RTCPeerConnection.prototype[method];
+    RTCPeerConnection.prototype[method] = function() {
+      var args = arguments;
+      if (typeof args[0] === 'function' ||
+          typeof args[1] === 'function') { // legacy
+        return nativeMethod.apply(this, [arguments[2]])
+        .then(function(description) {
+          if (typeof args[0] === 'function') {
+            args[0].apply(null, [description]);
+          }
+        }, function(error) {
+          if (typeof args[1] === 'function') {
+            args[1].apply(null, [error]);
+          }
+        });
+      }
+      return nativeMethod.apply(this, arguments);
+    };
+  });
+
+  methods = ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'];
+  methods.forEach(function(method) {
+    var nativeMethod = RTCPeerConnection.prototype[method];
+    RTCPeerConnection.prototype[method] = function() {
+      var args = arguments;
+      if (typeof args[1] === 'function' ||
+          typeof args[2] === 'function') { // legacy
+        return nativeMethod.apply(this, arguments)
+        .then(function() {
+          if (typeof args[1] === 'function') {
+            args[1].apply(null);
+          }
+        }, function(error) {
+          if (typeof args[2] === 'function') {
+            args[2].apply(null, [error]);
+          }
+        });
+      }
+      return nativeMethod.apply(this, arguments);
+    };
+  });
+
+  // getStats is special. It doesn't have a spec legacy method yet we support
+  // getStats(something, cb) without error callbacks.
+  ['getStats'].forEach(function(method) {
+    var nativeMethod = RTCPeerConnection.prototype[method];
+    RTCPeerConnection.prototype[method] = function() {
+      var args = arguments;
+      if (typeof args[1] === 'function') {
+        return nativeMethod.apply(this, arguments)
+        .then(function() {
+          if (typeof args[1] === 'function') {
+            args[1].apply(null);
+          }
+        });
+      }
+      return nativeMethod.apply(this, arguments);
+    };
+  });
+
+  return RTCPeerConnection;
+};
+
+},{"sdp":17}],17:[function(require,module,exports){
+/* eslint-env node */
+'use strict';
+
+// SDP helpers.
+var SDPUtils = {};
+
+// Generate an alphanumeric identifier for cname or mids.
+// TODO: use UUIDs instead? https://gist.github.com/jed/982883
+SDPUtils.generateIdentifier = function() {
+  return Math.random().toString(36).substr(2, 10);
+};
+
+// The RTCP CNAME used by all peerconnections from the same JS.
+SDPUtils.localCName = SDPUtils.generateIdentifier();
+
+// Splits SDP into lines, dealing with both CRLF and LF.
+SDPUtils.splitLines = function(blob) {
+  return blob.trim().split('\n').map(function(line) {
+    return line.trim();
+  });
+};
+// Splits SDP into sessionpart and mediasections. Ensures CRLF.
+SDPUtils.splitSections = function(blob) {
+  var parts = blob.split('\nm=');
+  return parts.map(function(part, index) {
+    return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
+  });
+};
+
+// returns the session description.
+SDPUtils.getDescription = function(blob) {
+  var sections = SDPUtils.splitSections(blob);
+  return sections && sections[0];
+};
+
+// returns the individual media sections.
+SDPUtils.getMediaSections = function(blob) {
+  var sections = SDPUtils.splitSections(blob);
+  sections.shift();
+  return sections;
+};
+
+// Returns lines that start with a certain prefix.
+SDPUtils.matchPrefix = function(blob, prefix) {
+  return SDPUtils.splitLines(blob).filter(function(line) {
+    return line.indexOf(prefix) === 0;
+  });
+};
+
+// Parses an ICE candidate line. Sample input:
+// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
+// rport 55996"
+SDPUtils.parseCandidate = function(line) {
+  var parts;
+  // Parse both variants.
+  if (line.indexOf('a=candidate:') === 0) {
+    parts = line.substring(12).split(' ');
+  } else {
+    parts = line.substring(10).split(' ');
+  }
+
+  var candidate = {
+    foundation: parts[0],
+    component: parseInt(parts[1], 10),
+    protocol: parts[2].toLowerCase(),
+    priority: parseInt(parts[3], 10),
+    ip: parts[4],
+    address: parts[4], // address is an alias for ip.
+    port: parseInt(parts[5], 10),
+    // skip parts[6] == 'typ'
+    type: parts[7]
+  };
+
+  for (var i = 8; i < parts.length; i += 2) {
+    switch (parts[i]) {
+      case 'raddr':
+        candidate.relatedAddress = parts[i + 1];
+        break;
+      case 'rport':
+        candidate.relatedPort = parseInt(parts[i + 1], 10);
+        break;
+      case 'tcptype':
+        candidate.tcpType = parts[i + 1];
+        break;
+      case 'ufrag':
+        candidate.ufrag = parts[i + 1]; // for backward compability.
+        candidate.usernameFragment = parts[i + 1];
+        break;
+      default: // extension handling, in particular ufrag
+        candidate[parts[i]] = parts[i + 1];
+        break;
+    }
+  }
+  return candidate;
+};
+
+// Translates a candidate object into SDP candidate attribute.
+SDPUtils.writeCandidate = function(candidate) {
+  var sdp = [];
+  sdp.push(candidate.foundation);
+  sdp.push(candidate.component);
+  sdp.push(candidate.protocol.toUpperCase());
+  sdp.push(candidate.priority);
+  sdp.push(candidate.address || candidate.ip);
+  sdp.push(candidate.port);
+
+  var type = candidate.type;
+  sdp.push('typ');
+  sdp.push(type);
+  if (type !== 'host' && candidate.relatedAddress &&
+      candidate.relatedPort) {
+    sdp.push('raddr');
+    sdp.push(candidate.relatedAddress);
+    sdp.push('rport');
+    sdp.push(candidate.relatedPort);
+  }
+  if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
+    sdp.push('tcptype');
+    sdp.push(candidate.tcpType);
+  }
+  if (candidate.usernameFragment || candidate.ufrag) {
+    sdp.push('ufrag');
+    sdp.push(candidate.usernameFragment || candidate.ufrag);
+  }
+  return 'candidate:' + sdp.join(' ');
+};
+
+// Parses an ice-options line, returns an array of option tags.
+// a=ice-options:foo bar
+SDPUtils.parseIceOptions = function(line) {
+  return line.substr(14).split(' ');
+};
+
+// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
+// a=rtpmap:111 opus/48000/2
+SDPUtils.parseRtpMap = function(line) {
+  var parts = line.substr(9).split(' ');
+  var parsed = {
+    payloadType: parseInt(parts.shift(), 10) // was: id
+  };
+
+  parts = parts[0].split('/');
+
+  parsed.name = parts[0];
+  parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
+  parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
+  // legacy alias, got renamed back to channels in ORTC.
+  parsed.numChannels = parsed.channels;
+  return parsed;
+};
+
+// Generate an a=rtpmap line from RTCRtpCodecCapability or
+// RTCRtpCodecParameters.
+SDPUtils.writeRtpMap = function(codec) {
+  var pt = codec.payloadType;
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+  var channels = codec.channels || codec.numChannels || 1;
+  return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +
+      (channels !== 1 ? '/' + channels : '') + '\r\n';
+};
+
+// Parses an a=extmap line (headerextension from RFC 5285). Sample input:
+// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
+// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
+SDPUtils.parseExtmap = function(line) {
+  var parts = line.substr(9).split(' ');
+  return {
+    id: parseInt(parts[0], 10),
+    direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
+    uri: parts[1]
+  };
+};
+
+// Generates a=extmap line from RTCRtpHeaderExtensionParameters or
+// RTCRtpHeaderExtension.
+SDPUtils.writeExtmap = function(headerExtension) {
+  return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
+      (headerExtension.direction && headerExtension.direction !== 'sendrecv'
+        ? '/' + headerExtension.direction
+        : '') +
+      ' ' + headerExtension.uri + '\r\n';
+};
+
+// Parses an ftmp line, returns dictionary. Sample input:
+// a=fmtp:96 vbr=on;cng=on
+// Also deals with vbr=on; cng=on
+SDPUtils.parseFmtp = function(line) {
+  var parsed = {};
+  var kv;
+  var parts = line.substr(line.indexOf(' ') + 1).split(';');
+  for (var j = 0; j < parts.length; j++) {
+    kv = parts[j].trim().split('=');
+    parsed[kv[0].trim()] = kv[1];
+  }
+  return parsed;
+};
+
+// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
+SDPUtils.writeFmtp = function(codec) {
+  var line = '';
+  var pt = codec.payloadType;
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+  if (codec.parameters && Object.keys(codec.parameters).length) {
+    var params = [];
+    Object.keys(codec.parameters).forEach(function(param) {
+      if (codec.parameters[param]) {
+        params.push(param + '=' + codec.parameters[param]);
+      } else {
+        params.push(param);
+      }
+    });
+    line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
+  }
+  return line;
+};
+
+// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
+// a=rtcp-fb:98 nack rpsi
+SDPUtils.parseRtcpFb = function(line) {
+  var parts = line.substr(line.indexOf(' ') + 1).split(' ');
+  return {
+    type: parts.shift(),
+    parameter: parts.join(' ')
+  };
+};
+// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
+SDPUtils.writeRtcpFb = function(codec) {
+  var lines = '';
+  var pt = codec.payloadType;
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+  if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
+    // FIXME: special handling for trr-int?
+    codec.rtcpFeedback.forEach(function(fb) {
+      lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +
+      (fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +
+          '\r\n';
+    });
+  }
+  return lines;
+};
+
+// Parses an RFC 5576 ssrc media attribute. Sample input:
+// a=ssrc:3735928559 cname:something
+SDPUtils.parseSsrcMedia = function(line) {
+  var sp = line.indexOf(' ');
+  var parts = {
+    ssrc: parseInt(line.substr(7, sp - 7), 10)
+  };
+  var colon = line.indexOf(':', sp);
+  if (colon > -1) {
+    parts.attribute = line.substr(sp + 1, colon - sp - 1);
+    parts.value = line.substr(colon + 1);
+  } else {
+    parts.attribute = line.substr(sp + 1);
+  }
+  return parts;
+};
+
+SDPUtils.parseSsrcGroup = function(line) {
+  var parts = line.substr(13).split(' ');
+  return {
+    semantics: parts.shift(),
+    ssrcs: parts.map(function(ssrc) {
+      return parseInt(ssrc, 10);
+    })
+  };
+};
+
+// Extracts the MID (RFC 5888) from a media section.
+// returns the MID or undefined if no mid line was found.
+SDPUtils.getMid = function(mediaSection) {
+  var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
+  if (mid) {
+    return mid.substr(6);
+  }
+};
+
+SDPUtils.parseFingerprint = function(line) {
+  var parts = line.substr(14).split(' ');
+  return {
+    algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.
+    value: parts[1]
+  };
+};
+
+// Extracts DTLS parameters from SDP media section or sessionpart.
+// FIXME: for consistency with other functions this should only
+//   get the fingerprint line as input. See also getIceParameters.
+SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
+  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
+    'a=fingerprint:');
+  // Note: a=setup line is ignored since we use the 'auto' role.
+  // Note2: 'algorithm' is not case sensitive except in Edge.
+  return {
+    role: 'auto',
+    fingerprints: lines.map(SDPUtils.parseFingerprint)
+  };
+};
+
+// Serializes DTLS parameters to SDP.
+SDPUtils.writeDtlsParameters = function(params, setupType) {
+  var sdp = 'a=setup:' + setupType + '\r\n';
+  params.fingerprints.forEach(function(fp) {
+    sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
+  });
+  return sdp;
+};
+
+// Parses a=crypto lines into
+//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#dictionary-rtcsrtpsdesparameters-members
+SDPUtils.parseCryptoLine = function(line) {
+  var parts = line.substr(9).split(' ');
+  return {
+    tag: parseInt(parts[0], 10),
+    cryptoSuite: parts[1],
+    keyParams: parts[2],
+    sessionParams: parts.slice(3),
+  };
+};
+
+SDPUtils.writeCryptoLine = function(parameters) {
+  return 'a=crypto:' + parameters.tag + ' ' +
+    parameters.cryptoSuite + ' ' +
+    (typeof parameters.keyParams === 'object'
+      ? SDPUtils.writeCryptoKeyParams(parameters.keyParams)
+      : parameters.keyParams) +
+    (parameters.sessionParams ? ' ' + parameters.sessionParams.join(' ') : '') +
+    '\r\n';
+};
+
+// Parses the crypto key parameters into
+//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#rtcsrtpkeyparam*
+SDPUtils.parseCryptoKeyParams = function(keyParams) {
+  if (keyParams.indexOf('inline:') !== 0) {
+    return null;
+  }
+  var parts = keyParams.substr(7).split('|');
+  return {
+    keyMethod: 'inline',
+    keySalt: parts[0],
+    lifeTime: parts[1],
+    mkiValue: parts[2] ? parts[2].split(':')[0] : undefined,
+    mkiLength: parts[2] ? parts[2].split(':')[1] : undefined,
+  };
+};
+
+SDPUtils.writeCryptoKeyParams = function(keyParams) {
+  return keyParams.keyMethod + ':'
+    + keyParams.keySalt +
+    (keyParams.lifeTime ? '|' + keyParams.lifeTime : '') +
+    (keyParams.mkiValue && keyParams.mkiLength
+      ? '|' + keyParams.mkiValue + ':' + keyParams.mkiLength
+      : '');
+};
+
+// Extracts all SDES paramters.
+SDPUtils.getCryptoParameters = function(mediaSection, sessionpart) {
+  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
+    'a=crypto:');
+  return lines.map(SDPUtils.parseCryptoLine);
+};
+
+// Parses ICE information from SDP media section or sessionpart.
+// FIXME: for consistency with other functions this should only
+//   get the ice-ufrag and ice-pwd lines as input.
+SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
+  var ufrag = SDPUtils.matchPrefix(mediaSection + sessionpart,
+    'a=ice-ufrag:')[0];
+  var pwd = SDPUtils.matchPrefix(mediaSection + sessionpart,
+    'a=ice-pwd:')[0];
+  if (!(ufrag && pwd)) {
+    return null;
+  }
+  return {
+    usernameFragment: ufrag.substr(12),
+    password: pwd.substr(10),
+  };
+};
+
+// Serializes ICE parameters to SDP.
+SDPUtils.writeIceParameters = function(params) {
+  return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
+      'a=ice-pwd:' + params.password + '\r\n';
+};
+
+// Parses the SDP media section and returns RTCRtpParameters.
+SDPUtils.parseRtpParameters = function(mediaSection) {
+  var description = {
+    codecs: [],
+    headerExtensions: [],
+    fecMechanisms: [],
+    rtcp: []
+  };
+  var lines = SDPUtils.splitLines(mediaSection);
+  var mline = lines[0].split(' ');
+  for (var i = 3; i < mline.length; i++) { // find all codecs from mline[3..]
+    var pt = mline[i];
+    var rtpmapline = SDPUtils.matchPrefix(
+      mediaSection, 'a=rtpmap:' + pt + ' ')[0];
+    if (rtpmapline) {
+      var codec = SDPUtils.parseRtpMap(rtpmapline);
+      var fmtps = SDPUtils.matchPrefix(
+        mediaSection, 'a=fmtp:' + pt + ' ');
+      // Only the first a=fmtp: is considered.
+      codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
+      codec.rtcpFeedback = SDPUtils.matchPrefix(
+        mediaSection, 'a=rtcp-fb:' + pt + ' ')
+        .map(SDPUtils.parseRtcpFb);
+      description.codecs.push(codec);
+      // parse FEC mechanisms from rtpmap lines.
+      switch (codec.name.toUpperCase()) {
+        case 'RED':
+        case 'ULPFEC':
+          description.fecMechanisms.push(codec.name.toUpperCase());
+          break;
+        default: // only RED and ULPFEC are recognized as FEC mechanisms.
+          break;
+      }
+    }
+  }
+  SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
+    description.headerExtensions.push(SDPUtils.parseExtmap(line));
+  });
+  // FIXME: parse rtcp.
+  return description;
+};
+
+// Generates parts of the SDP media section describing the capabilities /
+// parameters.
+SDPUtils.writeRtpDescription = function(kind, caps) {
+  var sdp = '';
+
+  // Build the mline.
+  sdp += 'm=' + kind + ' ';
+  sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
+  sdp += ' UDP/TLS/RTP/SAVPF ';
+  sdp += caps.codecs.map(function(codec) {
+    if (codec.preferredPayloadType !== undefined) {
+      return codec.preferredPayloadType;
+    }
+    return codec.payloadType;
+  }).join(' ') + '\r\n';
+
+  sdp += 'c=IN IP4 0.0.0.0\r\n';
+  sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';
+
+  // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
+  caps.codecs.forEach(function(codec) {
+    sdp += SDPUtils.writeRtpMap(codec);
+    sdp += SDPUtils.writeFmtp(codec);
+    sdp += SDPUtils.writeRtcpFb(codec);
+  });
+  var maxptime = 0;
+  caps.codecs.forEach(function(codec) {
+    if (codec.maxptime > maxptime) {
+      maxptime = codec.maxptime;
+    }
+  });
+  if (maxptime > 0) {
+    sdp += 'a=maxptime:' + maxptime + '\r\n';
+  }
+  sdp += 'a=rtcp-mux\r\n';
+
+  if (caps.headerExtensions) {
+    caps.headerExtensions.forEach(function(extension) {
+      sdp += SDPUtils.writeExtmap(extension);
+    });
+  }
+  // FIXME: write fecMechanisms.
+  return sdp;
+};
+
+// Parses the SDP media section and returns an array of
+// RTCRtpEncodingParameters.
+SDPUtils.parseRtpEncodingParameters = function(mediaSection) {
+  var encodingParameters = [];
+  var description = SDPUtils.parseRtpParameters(mediaSection);
+  var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
+  var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;
+
+  // filter a=ssrc:... cname:, ignore PlanB-msid
+  var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
+    .map(function(line) {
+      return SDPUtils.parseSsrcMedia(line);
+    })
+    .filter(function(parts) {
+      return parts.attribute === 'cname';
+    });
+  var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
+  var secondarySsrc;
+
+  var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')
+    .map(function(line) {
+      var parts = line.substr(17).split(' ');
+      return parts.map(function(part) {
+        return parseInt(part, 10);
+      });
+    });
+  if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
+    secondarySsrc = flows[0][1];
+  }
+
+  description.codecs.forEach(function(codec) {
+    if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
+      var encParam = {
+        ssrc: primarySsrc,
+        codecPayloadType: parseInt(codec.parameters.apt, 10)
+      };
+      if (primarySsrc && secondarySsrc) {
+        encParam.rtx = {ssrc: secondarySsrc};
+      }
+      encodingParameters.push(encParam);
+      if (hasRed) {
+        encParam = JSON.parse(JSON.stringify(encParam));
+        encParam.fec = {
+          ssrc: primarySsrc,
+          mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
+        };
+        encodingParameters.push(encParam);
+      }
+    }
+  });
+  if (encodingParameters.length === 0 && primarySsrc) {
+    encodingParameters.push({
+      ssrc: primarySsrc
+    });
+  }
+
+  // we support both b=AS and b=TIAS but interpret AS as TIAS.
+  var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
+  if (bandwidth.length) {
+    if (bandwidth[0].indexOf('b=TIAS:') === 0) {
+      bandwidth = parseInt(bandwidth[0].substr(7), 10);
+    } else if (bandwidth[0].indexOf('b=AS:') === 0) {
+      // use formula from JSEP to convert b=AS to TIAS value.
+      bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95
+          - (50 * 40 * 8);
+    } else {
+      bandwidth = undefined;
+    }
+    encodingParameters.forEach(function(params) {
+      params.maxBitrate = bandwidth;
+    });
+  }
+  return encodingParameters;
+};
+
+// parses http://draft.ortc.org/#rtcrtcpparameters*
+SDPUtils.parseRtcpParameters = function(mediaSection) {
+  var rtcpParameters = {};
+
+  // Gets the first SSRC. Note tha with RTX there might be multiple
+  // SSRCs.
+  var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
+    .map(function(line) {
+      return SDPUtils.parseSsrcMedia(line);
+    })
+    .filter(function(obj) {
+      return obj.attribute === 'cname';
+    })[0];
+  if (remoteSsrc) {
+    rtcpParameters.cname = remoteSsrc.value;
+    rtcpParameters.ssrc = remoteSsrc.ssrc;
+  }
+
+  // Edge uses the compound attribute instead of reducedSize
+  // compound is !reducedSize
+  var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
+  rtcpParameters.reducedSize = rsize.length > 0;
+  rtcpParameters.compound = rsize.length === 0;
+
+  // parses the rtcp-mux attrіbute.
+  // Note that Edge does not support unmuxed RTCP.
+  var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
+  rtcpParameters.mux = mux.length > 0;
+
+  return rtcpParameters;
+};
+
+// parses either a=msid: or a=ssrc:... msid lines and returns
+// the id of the MediaStream and MediaStreamTrack.
+SDPUtils.parseMsid = function(mediaSection) {
+  var parts;
+  var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
+  if (spec.length === 1) {
+    parts = spec[0].substr(7).split(' ');
+    return {stream: parts[0], track: parts[1]};
+  }
+  var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
+    .map(function(line) {
+      return SDPUtils.parseSsrcMedia(line);
+    })
+    .filter(function(msidParts) {
+      return msidParts.attribute === 'msid';
+    });
+  if (planB.length > 0) {
+    parts = planB[0].value.split(' ');
+    return {stream: parts[0], track: parts[1]};
+  }
+};
+
+// SCTP
+// parses draft-ietf-mmusic-sctp-sdp-26 first and falls back
+// to draft-ietf-mmusic-sctp-sdp-05
+SDPUtils.parseSctpDescription = function(mediaSection) {
+  var mline = SDPUtils.parseMLine(mediaSection);
+  var maxSizeLine = SDPUtils.matchPrefix(mediaSection, 'a=max-message-size:');
+  var maxMessageSize;
+  if (maxSizeLine.length > 0) {
+    maxMessageSize = parseInt(maxSizeLine[0].substr(19), 10);
+  }
+  if (isNaN(maxMessageSize)) {
+    maxMessageSize = 65536;
+  }
+  var sctpPort = SDPUtils.matchPrefix(mediaSection, 'a=sctp-port:');
+  if (sctpPort.length > 0) {
+    return {
+      port: parseInt(sctpPort[0].substr(12), 10),
+      protocol: mline.fmt,
+      maxMessageSize: maxMessageSize
+    };
+  }
+  var sctpMapLines = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:');
+  if (sctpMapLines.length > 0) {
+    var parts = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:')[0]
+      .substr(10)
+      .split(' ');
+    return {
+      port: parseInt(parts[0], 10),
+      protocol: parts[1],
+      maxMessageSize: maxMessageSize
+    };
+  }
+};
+
+// SCTP
+// outputs the draft-ietf-mmusic-sctp-sdp-26 version that all browsers
+// support by now receiving in this format, unless we originally parsed
+// as the draft-ietf-mmusic-sctp-sdp-05 format (indicated by the m-line
+// protocol of DTLS/SCTP -- without UDP/ or TCP/)
+SDPUtils.writeSctpDescription = function(media, sctp) {
+  var output = [];
+  if (media.protocol !== 'DTLS/SCTP') {
+    output = [
+      'm=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.protocol + '\r\n',
+      'c=IN IP4 0.0.0.0\r\n',
+      'a=sctp-port:' + sctp.port + '\r\n'
+    ];
+  } else {
+    output = [
+      'm=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.port + '\r\n',
+      'c=IN IP4 0.0.0.0\r\n',
+      'a=sctpmap:' + sctp.port + ' ' + sctp.protocol + ' 65535\r\n'
+    ];
+  }
+  if (sctp.maxMessageSize !== undefined) {
+    output.push('a=max-message-size:' + sctp.maxMessageSize + '\r\n');
+  }
+  return output.join('');
+};
+
+// Generate a session ID for SDP.
+// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1
+// recommends using a cryptographically random +ve 64-bit value
+// but right now this should be acceptable and within the right range
+SDPUtils.generateSessionId = function() {
+  return Math.random().toString().substr(2, 21);
+};
+
+// Write boilder plate for start of SDP
+// sessId argument is optional - if not supplied it will
+// be generated randomly
+// sessVersion is optional and defaults to 2
+// sessUser is optional and defaults to 'thisisadapterortc'
+SDPUtils.writeSessionBoilerplate = function(sessId, sessVer, sessUser) {
+  var sessionId;
+  var version = sessVer !== undefined ? sessVer : 2;
+  if (sessId) {
+    sessionId = sessId;
+  } else {
+    sessionId = SDPUtils.generateSessionId();
+  }
+  var user = sessUser || 'thisisadapterortc';
+  // FIXME: sess-id should be an NTP timestamp.
+  return 'v=0\r\n' +
+      'o=' + user + ' ' + sessionId + ' ' + version +
+        ' IN IP4 127.0.0.1\r\n' +
+      's=-\r\n' +
+      't=0 0\r\n';
+};
+
+SDPUtils.writeMediaSection = function(transceiver, caps, type, stream) {
+  var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);
+
+  // Map ICE parameters (ufrag, pwd) to SDP.
+  sdp += SDPUtils.writeIceParameters(
+    transceiver.iceGatherer.getLocalParameters());
+
+  // Map DTLS parameters to SDP.
+  sdp += SDPUtils.writeDtlsParameters(
+    transceiver.dtlsTransport.getLocalParameters(),
+    type === 'offer' ? 'actpass' : 'active');
+
+  sdp += 'a=mid:' + transceiver.mid + '\r\n';
+
+  if (transceiver.direction) {
+    sdp += 'a=' + transceiver.direction + '\r\n';
+  } else if (transceiver.rtpSender && transceiver.rtpReceiver) {
+    sdp += 'a=sendrecv\r\n';
+  } else if (transceiver.rtpSender) {
+    sdp += 'a=sendonly\r\n';
+  } else if (transceiver.rtpReceiver) {
+    sdp += 'a=recvonly\r\n';
+  } else {
+    sdp += 'a=inactive\r\n';
+  }
+
+  if (transceiver.rtpSender) {
+    // spec.
+    var msid = 'msid:' + stream.id + ' ' +
+        transceiver.rtpSender.track.id + '\r\n';
+    sdp += 'a=' + msid;
+
+    // for Chrome.
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
+        ' ' + msid;
+    if (transceiver.sendEncodingParameters[0].rtx) {
+      sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
+          ' ' + msid;
+      sdp += 'a=ssrc-group:FID ' +
+          transceiver.sendEncodingParameters[0].ssrc + ' ' +
+          transceiver.sendEncodingParameters[0].rtx.ssrc +
+          '\r\n';
+    }
+  }
+  // FIXME: this should be written by writeRtpDescription.
+  sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
+      ' cname:' + SDPUtils.localCName + '\r\n';
+  if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
+        ' cname:' + SDPUtils.localCName + '\r\n';
+  }
+  return sdp;
+};
+
+// Gets the direction from the mediaSection or the sessionpart.
+SDPUtils.getDirection = function(mediaSection, sessionpart) {
+  // Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
+  var lines = SDPUtils.splitLines(mediaSection);
+  for (var i = 0; i < lines.length; i++) {
+    switch (lines[i]) {
+      case 'a=sendrecv':
+      case 'a=sendonly':
+      case 'a=recvonly':
+      case 'a=inactive':
+        return lines[i].substr(2);
+      default:
+        // FIXME: What should happen here?
+    }
+  }
+  if (sessionpart) {
+    return SDPUtils.getDirection(sessionpart);
+  }
+  return 'sendrecv';
+};
+
+SDPUtils.getKind = function(mediaSection) {
+  var lines = SDPUtils.splitLines(mediaSection);
+  var mline = lines[0].split(' ');
+  return mline[0].substr(2);
+};
+
+SDPUtils.isRejected = function(mediaSection) {
+  return mediaSection.split(' ', 2)[1] === '0';
+};
+
+SDPUtils.parseMLine = function(mediaSection) {
+  var lines = SDPUtils.splitLines(mediaSection);
+  var parts = lines[0].substr(2).split(' ');
+  return {
+    kind: parts[0],
+    port: parseInt(parts[1], 10),
+    protocol: parts[2],
+    fmt: parts.slice(3).join(' ')
+  };
+};
+
+SDPUtils.parseOLine = function(mediaSection) {
+  var line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];
+  var parts = line.substr(2).split(' ');
+  return {
+    username: parts[0],
+    sessionId: parts[1],
+    sessionVersion: parseInt(parts[2], 10),
+    netType: parts[3],
+    addressType: parts[4],
+    address: parts[5]
+  };
+};
+
+// a very naive interpretation of a valid SDP.
+SDPUtils.isValidSDP = function(blob) {
+  if (typeof blob !== 'string' || blob.length === 0) {
+    return false;
+  }
+  var lines = SDPUtils.splitLines(blob);
+  for (var i = 0; i < lines.length; i++) {
+    if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {
+      return false;
+    }
+    // TODO: check the modifier a bit more.
+  }
+  return true;
+};
+
+// Expose public methods.
+if (typeof module === 'object') {
+  module.exports = SDPUtils;
+}
+
+},{}]},{},[1])(1)
+});
diff --git a/web/html/js/adapter-7.4.0.min.js b/web/html/js/adapter-7.4.0.min.js
new file mode 100644
index 0000000..7e76156
--- /dev/null
+++ b/web/html/js/adapter-7.4.0.min.js
@@ -0,0 +1 @@
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).adapter=e()}}((function(){return function e(t,r,n){function i(o,s){if(!r[o]){if(!t[o]){var c="function"==typeof require&&require;if(!s&&c)return c(o,!0);if(a)return a(o,!0);var d=new Error("Cannot find module '"+o+"'");throw d.code="MODULE_NOT_FOUND",d}var p=r[o]={exports:{}};t[o][0].call(p.exports,(function(e){return i(t[o][1][e]||e)}),p,p.exports,e,t,r,n)}return r[o].exports}for(var a="function"==typeof require&&require,o=0;o0&&void 0!==arguments[0]?arguments[0]:{},t=e.window,r=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{shimChrome:!0,shimFirefox:!0,shimEdge:!0,shimSafari:!0},d=n.log,p=n.detectBrowser(t),u={browserDetails:p,commonShim:c,extractVersion:n.extractVersion,disableLog:n.disableLog,disableWarnings:n.disableWarnings};switch(p.browser){case"chrome":if(!i||!i.shimPeerConnection||!r.shimChrome)return d("Chrome shim is not included in this adapter release."),u;d("adapter.js shimming chrome."),u.browserShim=i,i.shimGetUserMedia(t),i.shimMediaStream(t),i.shimPeerConnection(t),i.shimOnTrack(t),i.shimAddTrackRemoveTrack(t),i.shimGetSendersWithDtmf(t),i.shimGetStats(t),i.shimSenderReceiverGetStats(t),i.fixNegotiationNeeded(t),c.shimRTCIceCandidate(t),c.shimConnectionState(t),c.shimMaxMessageSize(t),c.shimSendThrowTypeError(t),c.removeAllowExtmapMixed(t);break;case"firefox":if(!o||!o.shimPeerConnection||!r.shimFirefox)return d("Firefox shim is not included in this adapter release."),u;d("adapter.js shimming firefox."),u.browserShim=o,o.shimGetUserMedia(t),o.shimPeerConnection(t),o.shimOnTrack(t),o.shimRemoveStream(t),o.shimSenderGetStats(t),o.shimReceiverGetStats(t),o.shimRTCDataChannel(t),o.shimAddTransceiver(t),o.shimCreateOffer(t),o.shimCreateAnswer(t),c.shimRTCIceCandidate(t),c.shimConnectionState(t),c.shimMaxMessageSize(t),c.shimSendThrowTypeError(t);break;case"edge":if(!a||!a.shimPeerConnection||!r.shimEdge)return d("MS edge shim is not included in this adapter release."),u;d("adapter.js shimming edge."),u.browserShim=a,a.shimGetUserMedia(t),a.shimGetDisplayMedia(t),a.shimPeerConnection(t),a.shimReplaceTrack(t),c.shimMaxMessageSize(t),c.shimSendThrowTypeError(t);break;case"safari":if(!s||!r.shimSafari)return d("Safari shim is not included in this adapter release."),u;d("adapter.js shimming safari."),u.browserShim=s,s.shimRTCIceServerUrls(t),s.shimCreateOfferLegacy(t),s.shimCallbacksAPI(t),s.shimLocalStreamsAPI(t),s.shimRemoteStreamsAPI(t),s.shimTrackEventTransceiver(t),s.shimGetUserMedia(t),c.shimRTCIceCandidate(t),c.shimMaxMessageSize(t),c.shimSendThrowTypeError(t),c.removeAllowExtmapMixed(t);break;default:d("Unsupported browser!")}return u};var n=d(e("./utils")),i=d(e("./chrome/chrome_shim")),a=d(e("./edge/edge_shim")),o=d(e("./firefox/firefox_shim")),s=d(e("./safari/safari_shim")),c=d(e("./common_shim"));function d(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}},{"./chrome/chrome_shim":3,"./common_shim":6,"./edge/edge_shim":7,"./firefox/firefox_shim":11,"./safari/safari_shim":14,"./utils":15}],3:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.shimGetDisplayMedia=r.shimGetUserMedia=void 0;var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},i=e("./getusermedia");Object.defineProperty(r,"shimGetUserMedia",{enumerable:!0,get:function(){return i.shimGetUserMedia}});var a=e("./getdisplaymedia");Object.defineProperty(r,"shimGetDisplayMedia",{enumerable:!0,get:function(){return a.shimGetDisplayMedia}}),r.shimMediaStream=function(e){e.MediaStream=e.MediaStream||e.webkitMediaStream},r.shimOnTrack=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection||"ontrack"in e.RTCPeerConnection.prototype)o.wrapPeerConnectionEvent(e,"track",(function(e){return e.transceiver||Object.defineProperty(e,"transceiver",{value:{receiver:e.receiver}}),e}));else{Object.defineProperty(e.RTCPeerConnection.prototype,"ontrack",{get:function(){return this._ontrack},set:function(e){this._ontrack&&this.removeEventListener("track",this._ontrack),this.addEventListener("track",this._ontrack=e)},enumerable:!0,configurable:!0});var t=e.RTCPeerConnection.prototype.setRemoteDescription;e.RTCPeerConnection.prototype.setRemoteDescription=function(){var r=this;return this._ontrackpoly||(this._ontrackpoly=function(t){t.stream.addEventListener("addtrack",(function(n){var i=void 0;i=e.RTCPeerConnection.prototype.getReceivers?r.getReceivers().find((function(e){return e.track&&e.track.id===n.track.id})):{track:n.track};var a=new Event("track");a.track=n.track,a.receiver=i,a.transceiver={receiver:i},a.streams=[t.stream],r.dispatchEvent(a)})),t.stream.getTracks().forEach((function(n){var i=void 0;i=e.RTCPeerConnection.prototype.getReceivers?r.getReceivers().find((function(e){return e.track&&e.track.id===n.id})):{track:n};var a=new Event("track");a.track=n,a.receiver=i,a.transceiver={receiver:i},a.streams=[t.stream],r.dispatchEvent(a)}))},this.addEventListener("addstream",this._ontrackpoly)),t.apply(this,arguments)}}},r.shimGetSendersWithDtmf=function(e){if("object"===(void 0===e?"undefined":n(e))&&e.RTCPeerConnection&&!("getSenders"in e.RTCPeerConnection.prototype)&&"createDTMFSender"in e.RTCPeerConnection.prototype){var t=function(e,t){return{track:t,get dtmf(){return void 0===this._dtmf&&("audio"===t.kind?this._dtmf=e.createDTMFSender(t):this._dtmf=null),this._dtmf},_pc:e}};if(!e.RTCPeerConnection.prototype.getSenders){e.RTCPeerConnection.prototype.getSenders=function(){return this._senders=this._senders||[],this._senders.slice()};var r=e.RTCPeerConnection.prototype.addTrack;e.RTCPeerConnection.prototype.addTrack=function(e,n){var i=r.apply(this,arguments);return i||(i=t(this,e),this._senders.push(i)),i};var i=e.RTCPeerConnection.prototype.removeTrack;e.RTCPeerConnection.prototype.removeTrack=function(e){i.apply(this,arguments);var t=this._senders.indexOf(e);-1!==t&&this._senders.splice(t,1)}}var a=e.RTCPeerConnection.prototype.addStream;e.RTCPeerConnection.prototype.addStream=function(e){var r=this;this._senders=this._senders||[],a.apply(this,[e]),e.getTracks().forEach((function(e){r._senders.push(t(r,e))}))};var o=e.RTCPeerConnection.prototype.removeStream;e.RTCPeerConnection.prototype.removeStream=function(e){var t=this;this._senders=this._senders||[],o.apply(this,[e]),e.getTracks().forEach((function(e){var r=t._senders.find((function(t){return t.track===e}));r&&t._senders.splice(t._senders.indexOf(r),1)}))}}else if("object"===(void 0===e?"undefined":n(e))&&e.RTCPeerConnection&&"getSenders"in e.RTCPeerConnection.prototype&&"createDTMFSender"in e.RTCPeerConnection.prototype&&e.RTCRtpSender&&!("dtmf"in e.RTCRtpSender.prototype)){var s=e.RTCPeerConnection.prototype.getSenders;e.RTCPeerConnection.prototype.getSenders=function(){var e=this,t=s.apply(this,[]);return t.forEach((function(t){return t._pc=e})),t},Object.defineProperty(e.RTCRtpSender.prototype,"dtmf",{get:function(){return void 0===this._dtmf&&("audio"===this.track.kind?this._dtmf=this._pc.createDTMFSender(this.track):this._dtmf=null),this._dtmf}})}},r.shimGetStats=function(e){if(!e.RTCPeerConnection)return;var t=e.RTCPeerConnection.prototype.getStats;e.RTCPeerConnection.prototype.getStats=function(){var e=this,r=Array.prototype.slice.call(arguments),n=r[0],i=r[1],a=r[2];if(arguments.length>0&&"function"==typeof n)return t.apply(this,arguments);if(0===t.length&&(0===arguments.length||"function"!=typeof n))return t.apply(this,[]);var o=function(e){var t={};return e.result().forEach((function(e){var r={id:e.id,timestamp:e.timestamp,type:{localcandidate:"local-candidate",remotecandidate:"remote-candidate"}[e.type]||e.type};e.names().forEach((function(t){r[t]=e.stat(t)})),t[r.id]=r})),t},s=function(e){return new Map(Object.keys(e).map((function(t){return[t,e[t]]})))};if(arguments.length>=2){var c=function(e){i(s(o(e)))};return t.apply(this,[c,n])}return new Promise((function(r,n){t.apply(e,[function(e){r(s(o(e)))},n])})).then(i,a)}},r.shimSenderReceiverGetStats=function(e){if(!("object"===(void 0===e?"undefined":n(e))&&e.RTCPeerConnection&&e.RTCRtpSender&&e.RTCRtpReceiver))return;if(!("getStats"in e.RTCRtpSender.prototype)){var t=e.RTCPeerConnection.prototype.getSenders;t&&(e.RTCPeerConnection.prototype.getSenders=function(){var e=this,r=t.apply(this,[]);return r.forEach((function(t){return t._pc=e})),r});var r=e.RTCPeerConnection.prototype.addTrack;r&&(e.RTCPeerConnection.prototype.addTrack=function(){var e=r.apply(this,arguments);return e._pc=this,e}),e.RTCRtpSender.prototype.getStats=function(){var e=this;return this._pc.getStats().then((function(t){return o.filterStats(t,e.track,!0)}))}}if(!("getStats"in e.RTCRtpReceiver.prototype)){var i=e.RTCPeerConnection.prototype.getReceivers;i&&(e.RTCPeerConnection.prototype.getReceivers=function(){var e=this,t=i.apply(this,[]);return t.forEach((function(t){return t._pc=e})),t}),o.wrapPeerConnectionEvent(e,"track",(function(e){return e.receiver._pc=e.srcElement,e})),e.RTCRtpReceiver.prototype.getStats=function(){var e=this;return this._pc.getStats().then((function(t){return o.filterStats(t,e.track,!1)}))}}if(!("getStats"in e.RTCRtpSender.prototype&&"getStats"in e.RTCRtpReceiver.prototype))return;var a=e.RTCPeerConnection.prototype.getStats;e.RTCPeerConnection.prototype.getStats=function(){if(arguments.length>0&&arguments[0]instanceof e.MediaStreamTrack){var t=arguments[0],r=void 0,n=void 0,i=void 0;return this.getSenders().forEach((function(e){e.track===t&&(r?i=!0:r=e)})),this.getReceivers().forEach((function(e){return e.track===t&&(n?i=!0:n=e),e.track===t})),i||r&&n?Promise.reject(new DOMException("There are more than one sender or receiver for the track.","InvalidAccessError")):r?r.getStats():n?n.getStats():Promise.reject(new DOMException("There is no sender or receiver for the track.","InvalidAccessError"))}return a.apply(this,arguments)}},r.shimAddTrackRemoveTrackWithNative=c,r.shimAddTrackRemoveTrack=function(e){if(!e.RTCPeerConnection)return;var t=o.detectBrowser(e);if(e.RTCPeerConnection.prototype.addTrack&&t.version>=65)return c(e);var r=e.RTCPeerConnection.prototype.getLocalStreams;e.RTCPeerConnection.prototype.getLocalStreams=function(){var e=this,t=r.apply(this);return this._reverseStreams=this._reverseStreams||{},t.map((function(t){return e._reverseStreams[t.id]}))};var n=e.RTCPeerConnection.prototype.addStream;e.RTCPeerConnection.prototype.addStream=function(t){var r=this;if(this._streams=this._streams||{},this._reverseStreams=this._reverseStreams||{},t.getTracks().forEach((function(e){if(r.getSenders().find((function(t){return t.track===e})))throw new DOMException("Track already exists.","InvalidAccessError")})),!this._reverseStreams[t.id]){var i=new e.MediaStream(t.getTracks());this._streams[t.id]=i,this._reverseStreams[i.id]=t,t=i}n.apply(this,[t])};var i=e.RTCPeerConnection.prototype.removeStream;function a(e,t){var r=t.sdp;return Object.keys(e._reverseStreams||[]).forEach((function(t){var n=e._reverseStreams[t],i=e._streams[n.id];r=r.replace(new RegExp(i.id,"g"),n.id)})),new RTCSessionDescription({type:t.type,sdp:r})}function d(e,t){var r=t.sdp;return Object.keys(e._reverseStreams||[]).forEach((function(t){var n=e._reverseStreams[t],i=e._streams[n.id];r=r.replace(new RegExp(n.id,"g"),i.id)})),new RTCSessionDescription({type:t.type,sdp:r})}e.RTCPeerConnection.prototype.removeStream=function(e){this._streams=this._streams||{},this._reverseStreams=this._reverseStreams||{},i.apply(this,[this._streams[e.id]||e]),delete this._reverseStreams[this._streams[e.id]?this._streams[e.id].id:e.id],delete this._streams[e.id]},e.RTCPeerConnection.prototype.addTrack=function(t,r){var n=this;if("closed"===this.signalingState)throw new DOMException("The RTCPeerConnection's signalingState is 'closed'.","InvalidStateError");var i=[].slice.call(arguments,1);if(1!==i.length||!i[0].getTracks().find((function(e){return e===t})))throw new DOMException("The adapter.js addTrack polyfill only supports a single  stream which is associated with the specified track.","NotSupportedError");var a=this.getSenders().find((function(e){return e.track===t}));if(a)throw new DOMException("Track already exists.","InvalidAccessError");this._streams=this._streams||{},this._reverseStreams=this._reverseStreams||{};var o=this._streams[r.id];if(o)o.addTrack(t),Promise.resolve().then((function(){n.dispatchEvent(new Event("negotiationneeded"))}));else{var s=new e.MediaStream([t]);this._streams[r.id]=s,this._reverseStreams[s.id]=r,this.addStream(s)}return this.getSenders().find((function(e){return e.track===t}))},["createOffer","createAnswer"].forEach((function(t){var r=e.RTCPeerConnection.prototype[t],n=s({},t,(function(){var e=this,t=arguments,n=arguments.length&&"function"==typeof arguments[0];return n?r.apply(this,[function(r){var n=a(e,r);t[0].apply(null,[n])},function(e){t[1]&&t[1].apply(null,e)},arguments[2]]):r.apply(this,arguments).then((function(t){return a(e,t)}))}));e.RTCPeerConnection.prototype[t]=n[t]}));var p=e.RTCPeerConnection.prototype.setLocalDescription;e.RTCPeerConnection.prototype.setLocalDescription=function(){return arguments.length&&arguments[0].type?(arguments[0]=d(this,arguments[0]),p.apply(this,arguments)):p.apply(this,arguments)};var u=Object.getOwnPropertyDescriptor(e.RTCPeerConnection.prototype,"localDescription");Object.defineProperty(e.RTCPeerConnection.prototype,"localDescription",{get:function(){var e=u.get.apply(this);return""===e.type?e:a(this,e)}}),e.RTCPeerConnection.prototype.removeTrack=function(e){var t=this;if("closed"===this.signalingState)throw new DOMException("The RTCPeerConnection's signalingState is 'closed'.","InvalidStateError");if(!e._pc)throw new DOMException("Argument 1 of RTCPeerConnection.removeTrack does not implement interface RTCRtpSender.","TypeError");if(!(e._pc===this))throw new DOMException("Sender was not created by this connection.","InvalidAccessError");this._streams=this._streams||{};var r=void 0;Object.keys(this._streams).forEach((function(n){t._streams[n].getTracks().find((function(t){return e.track===t}))&&(r=t._streams[n])})),r&&(1===r.getTracks().length?this.removeStream(this._reverseStreams[r.id]):r.removeTrack(e.track),this.dispatchEvent(new Event("negotiationneeded")))}},r.shimPeerConnection=function(e){var t=o.detectBrowser(e);!e.RTCPeerConnection&&e.webkitRTCPeerConnection&&(e.RTCPeerConnection=e.webkitRTCPeerConnection);if(!e.RTCPeerConnection)return;t.version<53&&["setLocalDescription","setRemoteDescription","addIceCandidate"].forEach((function(t){var r=e.RTCPeerConnection.prototype[t],n=s({},t,(function(){return arguments[0]=new("addIceCandidate"===t?e.RTCIceCandidate:e.RTCSessionDescription)(arguments[0]),r.apply(this,arguments)}));e.RTCPeerConnection.prototype[t]=n[t]}));var r=e.RTCPeerConnection.prototype.addIceCandidate;e.RTCPeerConnection.prototype.addIceCandidate=function(){return arguments[0]?t.version<78&&arguments[0]&&""===arguments[0].candidate?Promise.resolve():r.apply(this,arguments):(arguments[1]&&arguments[1].apply(null),Promise.resolve())}},r.fixNegotiationNeeded=function(e){o.wrapPeerConnectionEvent(e,"negotiationneeded",(function(e){if("stable"===e.target.signalingState)return e}))};var o=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("../utils.js"));function s(e,t,r){return t in e?Object.defineProperty(e,t,{value:r,enumerable:!0,configurable:!0,writable:!0}):e[t]=r,e}function c(e){e.RTCPeerConnection.prototype.getLocalStreams=function(){var e=this;return this._shimmedLocalStreams=this._shimmedLocalStreams||{},Object.keys(this._shimmedLocalStreams).map((function(t){return e._shimmedLocalStreams[t][0]}))};var t=e.RTCPeerConnection.prototype.addTrack;e.RTCPeerConnection.prototype.addTrack=function(e,r){if(!r)return t.apply(this,arguments);this._shimmedLocalStreams=this._shimmedLocalStreams||{};var n=t.apply(this,arguments);return this._shimmedLocalStreams[r.id]?-1===this._shimmedLocalStreams[r.id].indexOf(n)&&this._shimmedLocalStreams[r.id].push(n):this._shimmedLocalStreams[r.id]=[r,n],n};var r=e.RTCPeerConnection.prototype.addStream;e.RTCPeerConnection.prototype.addStream=function(e){var t=this;this._shimmedLocalStreams=this._shimmedLocalStreams||{},e.getTracks().forEach((function(e){if(t.getSenders().find((function(t){return t.track===e})))throw new DOMException("Track already exists.","InvalidAccessError")}));var n=this.getSenders();r.apply(this,arguments);var i=this.getSenders().filter((function(e){return-1===n.indexOf(e)}));this._shimmedLocalStreams[e.id]=[e].concat(i)};var n=e.RTCPeerConnection.prototype.removeStream;e.RTCPeerConnection.prototype.removeStream=function(e){return this._shimmedLocalStreams=this._shimmedLocalStreams||{},delete this._shimmedLocalStreams[e.id],n.apply(this,arguments)};var i=e.RTCPeerConnection.prototype.removeTrack;e.RTCPeerConnection.prototype.removeTrack=function(e){var t=this;return this._shimmedLocalStreams=this._shimmedLocalStreams||{},e&&Object.keys(this._shimmedLocalStreams).forEach((function(r){var n=t._shimmedLocalStreams[r].indexOf(e);-1!==n&&t._shimmedLocalStreams[r].splice(n,1),1===t._shimmedLocalStreams[r].length&&delete t._shimmedLocalStreams[r]})),i.apply(this,arguments)}}},{"../utils.js":15,"./getdisplaymedia":4,"./getusermedia":5}],4:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.shimGetDisplayMedia=function(e,t){if(e.navigator.mediaDevices&&"getDisplayMedia"in e.navigator.mediaDevices)return;if(!e.navigator.mediaDevices)return;if("function"!=typeof t)return void console.error("shimGetDisplayMedia: getSourceId argument is not a function");e.navigator.mediaDevices.getDisplayMedia=function(r){return t(r).then((function(t){var n=r.video&&r.video.width,i=r.video&&r.video.height,a=r.video&&r.video.frameRate;return r.video={mandatory:{chromeMediaSource:"desktop",chromeMediaSourceId:t,maxFrameRate:a||3}},n&&(r.video.mandatory.maxWidth=n),i&&(r.video.mandatory.maxHeight=i),e.navigator.mediaDevices.getUserMedia(r)}))}}},{}],5:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e};r.shimGetUserMedia=function(e){var t=e&&e.navigator;if(!t.mediaDevices)return;var r=i.detectBrowser(e),o=function(e){if("object"!==(void 0===e?"undefined":n(e))||e.mandatory||e.optional)return e;var t={};return Object.keys(e).forEach((function(r){if("require"!==r&&"advanced"!==r&&"mediaSource"!==r){var i="object"===n(e[r])?e[r]:{ideal:e[r]};void 0!==i.exact&&"number"==typeof i.exact&&(i.min=i.max=i.exact);var a=function(e,t){return e?e+t.charAt(0).toUpperCase()+t.slice(1):"deviceId"===t?"sourceId":t};if(void 0!==i.ideal){t.optional=t.optional||[];var o={};"number"==typeof i.ideal?(o[a("min",r)]=i.ideal,t.optional.push(o),(o={})[a("max",r)]=i.ideal,t.optional.push(o)):(o[a("",r)]=i.ideal,t.optional.push(o))}void 0!==i.exact&&"number"!=typeof i.exact?(t.mandatory=t.mandatory||{},t.mandatory[a("",r)]=i.exact):["min","max"].forEach((function(e){void 0!==i[e]&&(t.mandatory=t.mandatory||{},t.mandatory[a(e,r)]=i[e])}))}})),e.advanced&&(t.optional=(t.optional||[]).concat(e.advanced)),t},s=function(e,i){if(r.version>=61)return i(e);if((e=JSON.parse(JSON.stringify(e)))&&"object"===n(e.audio)){var s=function(e,t,r){t in e&&!(r in e)&&(e[r]=e[t],delete e[t])};s((e=JSON.parse(JSON.stringify(e))).audio,"autoGainControl","googAutoGainControl"),s(e.audio,"noiseSuppression","googNoiseSuppression"),e.audio=o(e.audio)}if(e&&"object"===n(e.video)){var c=e.video.facingMode;c=c&&("object"===(void 0===c?"undefined":n(c))?c:{ideal:c});var d=r.version<66;if(c&&("user"===c.exact||"environment"===c.exact||"user"===c.ideal||"environment"===c.ideal)&&(!t.mediaDevices.getSupportedConstraints||!t.mediaDevices.getSupportedConstraints().facingMode||d)){delete e.video.facingMode;var p=void 0;if("environment"===c.exact||"environment"===c.ideal?p=["back","rear"]:"user"!==c.exact&&"user"!==c.ideal||(p=["front"]),p)return t.mediaDevices.enumerateDevices().then((function(t){var r=(t=t.filter((function(e){return"videoinput"===e.kind}))).find((function(e){return p.some((function(t){return e.label.toLowerCase().includes(t)}))}));return!r&&t.length&&p.includes("back")&&(r=t[t.length-1]),r&&(e.video.deviceId=c.exact?{exact:r.deviceId}:{ideal:r.deviceId}),e.video=o(e.video),a("chrome: "+JSON.stringify(e)),i(e)}))}e.video=o(e.video)}return a("chrome: "+JSON.stringify(e)),i(e)},c=function(e){return r.version>=64?e:{name:{PermissionDeniedError:"NotAllowedError",PermissionDismissedError:"NotAllowedError",InvalidStateError:"NotAllowedError",DevicesNotFoundError:"NotFoundError",ConstraintNotSatisfiedError:"OverconstrainedError",TrackStartError:"NotReadableError",MediaDeviceFailedDueToShutdown:"NotAllowedError",MediaDeviceKillSwitchOn:"NotAllowedError",TabCaptureError:"AbortError",ScreenCaptureError:"AbortError",DeviceCaptureError:"AbortError"}[e.name]||e.name,message:e.message,constraint:e.constraint||e.constraintName,toString:function(){return this.name+(this.message&&": ")+this.message}}};if(t.getUserMedia=function(e,r,n){s(e,(function(e){t.webkitGetUserMedia(e,r,(function(e){n&&n(c(e))}))}))}.bind(t),t.mediaDevices.getUserMedia){var d=t.mediaDevices.getUserMedia.bind(t.mediaDevices);t.mediaDevices.getUserMedia=function(e){return s(e,(function(e){return d(e).then((function(t){if(e.audio&&!t.getAudioTracks().length||e.video&&!t.getVideoTracks().length)throw t.getTracks().forEach((function(e){e.stop()})),new DOMException("","NotFoundError");return t}),(function(e){return Promise.reject(c(e))}))}))}}};var i=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("../utils.js"));var a=i.log},{"../utils.js":15}],6:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e};r.shimRTCIceCandidate=function(e){if(!e.RTCIceCandidate||e.RTCIceCandidate&&"foundation"in e.RTCIceCandidate.prototype)return;var t=e.RTCIceCandidate;e.RTCIceCandidate=function(e){if("object"===(void 0===e?"undefined":n(e))&&e.candidate&&0===e.candidate.indexOf("a=")&&((e=JSON.parse(JSON.stringify(e))).candidate=e.candidate.substr(2)),e.candidate&&e.candidate.length){var r=new t(e),i=o.default.parseCandidate(e.candidate),a=Object.assign(r,i);return a.toJSON=function(){return{candidate:a.candidate,sdpMid:a.sdpMid,sdpMLineIndex:a.sdpMLineIndex,usernameFragment:a.usernameFragment}},a}return new t(e)},e.RTCIceCandidate.prototype=t.prototype,s.wrapPeerConnectionEvent(e,"icecandidate",(function(t){return t.candidate&&Object.defineProperty(t,"candidate",{value:new e.RTCIceCandidate(t.candidate),writable:"false"}),t}))},r.shimMaxMessageSize=function(e){if(!e.RTCPeerConnection)return;var t=s.detectBrowser(e);"sctp"in e.RTCPeerConnection.prototype||Object.defineProperty(e.RTCPeerConnection.prototype,"sctp",{get:function(){return void 0===this._sctp?null:this._sctp}});var r=function(e){if(!e||!e.sdp)return!1;var t=o.default.splitSections(e.sdp);return t.shift(),t.some((function(e){var t=o.default.parseMLine(e);return t&&"application"===t.kind&&-1!==t.protocol.indexOf("SCTP")}))},n=function(e){var t=e.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);if(null===t||t.length<2)return-1;var r=parseInt(t[1],10);return r!=r?-1:r},i=function(e){var r=65536;return"firefox"===t.browser&&(r=t.version<57?-1===e?16384:2147483637:t.version<60?57===t.version?65535:65536:2147483637),r},a=function(e,r){var n=65536;"firefox"===t.browser&&57===t.version&&(n=65535);var i=o.default.matchPrefix(e.sdp,"a=max-message-size:");return i.length>0?n=parseInt(i[0].substr(19),10):"firefox"===t.browser&&-1!==r&&(n=2147483637),n},c=e.RTCPeerConnection.prototype.setRemoteDescription;e.RTCPeerConnection.prototype.setRemoteDescription=function(){if(this._sctp=null,"chrome"===t.browser&&t.version>=76){var e=this.getConfiguration(),o=e.sdpSemantics;"plan-b"===o&&Object.defineProperty(this,"sctp",{get:function(){return void 0===this._sctp?null:this._sctp},enumerable:!0,configurable:!0})}if(r(arguments[0])){var s=n(arguments[0]),d=i(s),p=a(arguments[0],s),u=void 0;u=0===d&&0===p?Number.POSITIVE_INFINITY:0===d||0===p?Math.max(d,p):Math.min(d,p);var f={};Object.defineProperty(f,"maxMessageSize",{get:function(){return u}}),this._sctp=f}return c.apply(this,arguments)}},r.shimSendThrowTypeError=function(e){if(!(e.RTCPeerConnection&&"createDataChannel"in e.RTCPeerConnection.prototype))return;function t(e,t){var r=e.send;e.send=function(){var n=arguments[0],i=n.length||n.size||n.byteLength;if("open"===e.readyState&&t.sctp&&i>t.sctp.maxMessageSize)throw new TypeError("Message too large (can send a maximum of "+t.sctp.maxMessageSize+" bytes)");return r.apply(e,arguments)}}var r=e.RTCPeerConnection.prototype.createDataChannel;e.RTCPeerConnection.prototype.createDataChannel=function(){var e=r.apply(this,arguments);return t(e,this),e},s.wrapPeerConnectionEvent(e,"datachannel",(function(e){return t(e.channel,e.target),e}))},r.shimConnectionState=function(e){if(!e.RTCPeerConnection||"connectionState"in e.RTCPeerConnection.prototype)return;var t=e.RTCPeerConnection.prototype;Object.defineProperty(t,"connectionState",{get:function(){return{completed:"connected",checking:"connecting"}[this.iceConnectionState]||this.iceConnectionState},enumerable:!0,configurable:!0}),Object.defineProperty(t,"onconnectionstatechange",{get:function(){return this._onconnectionstatechange||null},set:function(e){this._onconnectionstatechange&&(this.removeEventListener("connectionstatechange",this._onconnectionstatechange),delete this._onconnectionstatechange),e&&this.addEventListener("connectionstatechange",this._onconnectionstatechange=e)},enumerable:!0,configurable:!0}),["setLocalDescription","setRemoteDescription"].forEach((function(e){var r=t[e];t[e]=function(){return this._connectionstatechangepoly||(this._connectionstatechangepoly=function(e){var t=e.target;if(t._lastConnectionState!==t.connectionState){t._lastConnectionState=t.connectionState;var r=new Event("connectionstatechange",e);t.dispatchEvent(r)}return e},this.addEventListener("iceconnectionstatechange",this._connectionstatechangepoly)),r.apply(this,arguments)}}))},r.removeAllowExtmapMixed=function(e){if(!e.RTCPeerConnection)return;var t=s.detectBrowser(e);if("chrome"===t.browser&&t.version>=71)return;var r=e.RTCPeerConnection.prototype.setRemoteDescription;e.RTCPeerConnection.prototype.setRemoteDescription=function(e){return e&&e.sdp&&-1!==e.sdp.indexOf("\na=extmap-allow-mixed")&&(e.sdp=e.sdp.split("\n").filter((function(e){return"a=extmap-allow-mixed"!==e.trim()})).join("\n")),r.apply(this,arguments)}};var i,a=e("sdp"),o=(i=a)&&i.__esModule?i:{default:i},s=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("./utils"))},{"./utils":15,sdp:17}],7:[function(e,t,r){"use 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0===this._dtmf&&("audio"===this.track.kind?this._dtmf=new e.RTCDtmfSender(this):"video"===this.track.kind&&(this._dtmf=null)),this._dtmf}});e.RTCDtmfSender&&!e.RTCDTMFSender&&(e.RTCDTMFSender=e.RTCDtmfSender);var n=(0,d.default)(e,t.version);e.RTCPeerConnection=function(e){return e&&e.iceServers&&(e.iceServers=(0,s.filterIceServers)(e.iceServers,t.version),o.log("ICE servers after filtering:",e.iceServers)),new n(e)},e.RTCPeerConnection.prototype=n.prototype},r.shimReplaceTrack=function(e){!e.RTCRtpSender||"replaceTrack"in e.RTCRtpSender.prototype||(e.RTCRtpSender.prototype.replaceTrack=e.RTCRtpSender.prototype.setTrack)};var a,o=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("../utils")),s=e("./filtericeservers"),c=e("rtcpeerconnection-shim"),d=(a=c)&&a.__esModule?a:{default:a}},{"../utils":15,"./filtericeservers":8,"./getdisplaymedia":9,"./getusermedia":10,"rtcpeerconnection-shim":16}],8:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.filterIceServers=function(e,t){var r=!1;return(e=JSON.parse(JSON.stringify(e))).filter((function(e){if(e&&(e.urls||e.url)){var t=e.urls||e.url;e.url&&!e.urls&&n.deprecated("RTCIceServer.url","RTCIceServer.urls");var i="string"==typeof t;return i&&(t=[t]),t=t.filter((function(e){if(0===e.indexOf("stun:"))return!1;var t=e.startsWith("turn")&&!e.startsWith("turn:[")&&e.includes("transport=udp");return t&&!r?(r=!0,!0):t&&!r})),delete e.url,e.urls=i?t[0]:t,!!t.length}}))};var n=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("../utils"))},{"../utils":15}],9:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.shimGetDisplayMedia=function(e){if(!("getDisplayMedia"in e.navigator))return;if(!e.navigator.mediaDevices)return;if(e.navigator.mediaDevices&&"getDisplayMedia"in e.navigator.mediaDevices)return;e.navigator.mediaDevices.getDisplayMedia=e.navigator.getDisplayMedia.bind(e.navigator)}},{}],10:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.shimGetUserMedia=function(e){var t=e&&e.navigator,r=t.mediaDevices.getUserMedia.bind(t.mediaDevices);t.mediaDevices.getUserMedia=function(e){return r(e).catch((function(e){return Promise.reject(function(e){return{name:{PermissionDeniedError:"NotAllowedError"}[e.name]||e.name,message:e.message,constraint:e.constraint,toString:function(){return this.name}}}(e))}))}}},{}],11:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.shimGetDisplayMedia=r.shimGetUserMedia=void 0;var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},i=e("./getusermedia");Object.defineProperty(r,"shimGetUserMedia",{enumerable:!0,get:function(){return i.shimGetUserMedia}});var a=e("./getdisplaymedia");Object.defineProperty(r,"shimGetDisplayMedia",{enumerable:!0,get:function(){return a.shimGetDisplayMedia}}),r.shimOnTrack=function(e){"object"===(void 0===e?"undefined":n(e))&&e.RTCTrackEvent&&"receiver"in e.RTCTrackEvent.prototype&&!("transceiver"in e.RTCTrackEvent.prototype)&&Object.defineProperty(e.RTCTrackEvent.prototype,"transceiver",{get:function(){return{receiver:this.receiver}}})},r.shimPeerConnection=function(e){var t=o.detectBrowser(e);if("object"!==(void 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i={inboundrtp:"inbound-rtp",outboundrtp:"outbound-rtp",candidatepair:"candidate-pair",localcandidate:"local-candidate",remotecandidate:"remote-candidate"},a=e.RTCPeerConnection.prototype.getStats;e.RTCPeerConnection.prototype.getStats=function(){var e=Array.prototype.slice.call(arguments),r=e[0],n=e[1],o=e[2];return a.apply(this,[r||null]).then((function(e){if(t.version<53&&!n)try{e.forEach((function(e){e.type=i[e.type]||e.type}))}catch(t){if("TypeError"!==t.name)throw t;e.forEach((function(t,r){e.set(r,Object.assign({},t,{type:i[t.type]||t.type}))}))}return e})).then(n,o)}},r.shimSenderGetStats=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection||!e.RTCRtpSender)return;if(e.RTCRtpSender&&"getStats"in e.RTCRtpSender.prototype)return;var t=e.RTCPeerConnection.prototype.getSenders;t&&(e.RTCPeerConnection.prototype.getSenders=function(){var e=this,r=t.apply(this,[]);return r.forEach((function(t){return t._pc=e})),r});var r=e.RTCPeerConnection.prototype.addTrack;r&&(e.RTCPeerConnection.prototype.addTrack=function(){var e=r.apply(this,arguments);return e._pc=this,e});e.RTCRtpSender.prototype.getStats=function(){return this.track?this._pc.getStats(this.track):Promise.resolve(new Map)}},r.shimReceiverGetStats=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection||!e.RTCRtpSender)return;if(e.RTCRtpSender&&"getStats"in e.RTCRtpReceiver.prototype)return;var t=e.RTCPeerConnection.prototype.getReceivers;t&&(e.RTCPeerConnection.prototype.getReceivers=function(){var e=this,r=t.apply(this,[]);return r.forEach((function(t){return t._pc=e})),r});o.wrapPeerConnectionEvent(e,"track",(function(e){return e.receiver._pc=e.srcElement,e})),e.RTCRtpReceiver.prototype.getStats=function(){return this._pc.getStats(this.track)}},r.shimRemoveStream=function(e){if(!e.RTCPeerConnection||"removeStream"in e.RTCPeerConnection.prototype)return;e.RTCPeerConnection.prototype.removeStream=function(e){var t=this;o.deprecated("removeStream","removeTrack"),this.getSenders().forEach((function(r){r.track&&e.getTracks().includes(r.track)&&t.removeTrack(r)}))}},r.shimRTCDataChannel=function(e){e.DataChannel&&!e.RTCDataChannel&&(e.RTCDataChannel=e.DataChannel)},r.shimAddTransceiver=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection)return;var t=e.RTCPeerConnection.prototype.addTransceiver;t&&(e.RTCPeerConnection.prototype.addTransceiver=function(){this.setParametersPromises=[];var e=arguments[1],r=e&&"sendEncodings"in e;r&&e.sendEncodings.forEach((function(e){if("rid"in e){if(!/^[a-z0-9]{0,16}$/i.test(e.rid))throw new TypeError("Invalid RID value provided.")}if("scaleResolutionDownBy"in e&&!(parseFloat(e.scaleResolutionDownBy)>=1))throw new RangeError("scale_resolution_down_by must be >= 1.0");if("maxFramerate"in e&&!(parseFloat(e.maxFramerate)>=0))throw new RangeError("max_framerate must be >= 0.0")}));var n=t.apply(this,arguments);if(r){var i=n.sender,a=i.getParameters();"encodings"in a||(a.encodings=e.sendEncodings,this.setParametersPromises.push(i.setParameters(a).catch((function(){}))))}return n})},r.shimCreateOffer=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection)return;var t=e.RTCPeerConnection.prototype.createOffer;e.RTCPeerConnection.prototype.createOffer=function(){var e=this,r=arguments;return this.setParametersPromises&&this.setParametersPromises.length?Promise.all(this.setParametersPromises).then((function(){return t.apply(e,r)})).finally((function(){e.setParametersPromises=[]})):t.apply(this,arguments)}},r.shimCreateAnswer=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection)return;var t=e.RTCPeerConnection.prototype.createAnswer;e.RTCPeerConnection.prototype.createAnswer=function(){var e=this,r=arguments;return this.setParametersPromises&&this.setParametersPromises.length?Promise.all(this.setParametersPromises).then((function(){return t.apply(e,r)})).finally((function(){e.setParametersPromises=[]})):t.apply(this,arguments)}};var o=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("../utils"))},{"../utils":15,"./getdisplaymedia":12,"./getusermedia":13}],12:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0}),r.shimGetDisplayMedia=function(e,t){if(e.navigator.mediaDevices&&"getDisplayMedia"in e.navigator.mediaDevices)return;if(!e.navigator.mediaDevices)return;e.navigator.mediaDevices.getDisplayMedia=function(r){if(!r||!r.video){var n=new DOMException("getDisplayMedia without video constraints is undefined");return n.name="NotFoundError",n.code=8,Promise.reject(n)}return!0===r.video?r.video={mediaSource:t}:r.video.mediaSource=t,e.navigator.mediaDevices.getUserMedia(r)}}},{}],13:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e};r.shimGetUserMedia=function(e){var t=i.detectBrowser(e),r=e&&e.navigator,a=e&&e.MediaStreamTrack;if(r.getUserMedia=function(e,t,n){i.deprecated("navigator.getUserMedia","navigator.mediaDevices.getUserMedia"),r.mediaDevices.getUserMedia(e).then(t,n)},!(t.version>55&&"autoGainControl"in r.mediaDevices.getSupportedConstraints())){var o=function(e,t,r){t in e&&!(r in e)&&(e[r]=e[t],delete e[t])},s=r.mediaDevices.getUserMedia.bind(r.mediaDevices);if(r.mediaDevices.getUserMedia=function(e){return"object"===(void 0===e?"undefined":n(e))&&"object"===n(e.audio)&&(e=JSON.parse(JSON.stringify(e)),o(e.audio,"autoGainControl","mozAutoGainControl"),o(e.audio,"noiseSuppression","mozNoiseSuppression")),s(e)},a&&a.prototype.getSettings){var c=a.prototype.getSettings;a.prototype.getSettings=function(){var e=c.apply(this,arguments);return o(e,"mozAutoGainControl","autoGainControl"),o(e,"mozNoiseSuppression","noiseSuppression"),e}}if(a&&a.prototype.applyConstraints){var d=a.prototype.applyConstraints;a.prototype.applyConstraints=function(e){return"audio"===this.kind&&"object"===(void 0===e?"undefined":n(e))&&(e=JSON.parse(JSON.stringify(e)),o(e,"autoGainControl","mozAutoGainControl"),o(e,"noiseSuppression","mozNoiseSuppression")),d.apply(this,[e])}}}};var i=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r]);return t.default=e,t}(e("../utils"))},{"../utils":15}],14:[function(e,t,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e};r.shimLocalStreamsAPI=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection)return;"getLocalStreams"in e.RTCPeerConnection.prototype||(e.RTCPeerConnection.prototype.getLocalStreams=function(){return this._localStreams||(this._localStreams=[]),this._localStreams});if(!("addStream"in e.RTCPeerConnection.prototype)){var t=e.RTCPeerConnection.prototype.addTrack;e.RTCPeerConnection.prototype.addStream=function(e){var r=this;this._localStreams||(this._localStreams=[]),this._localStreams.includes(e)||this._localStreams.push(e),e.getAudioTracks().forEach((function(n){return t.call(r,n,e)})),e.getVideoTracks().forEach((function(n){return t.call(r,n,e)}))},e.RTCPeerConnection.prototype.addTrack=function(e){var r=arguments[1];return r&&(this._localStreams?this._localStreams.includes(r)||this._localStreams.push(r):this._localStreams=[r]),t.apply(this,arguments)}}"removeStream"in e.RTCPeerConnection.prototype||(e.RTCPeerConnection.prototype.removeStream=function(e){var t=this;this._localStreams||(this._localStreams=[]);var r=this._localStreams.indexOf(e);if(-1!==r){this._localStreams.splice(r,1);var n=e.getTracks();this.getSenders().forEach((function(e){n.includes(e.track)&&t.removeTrack(e)}))}})},r.shimRemoteStreamsAPI=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection)return;"getRemoteStreams"in e.RTCPeerConnection.prototype||(e.RTCPeerConnection.prototype.getRemoteStreams=function(){return this._remoteStreams?this._remoteStreams:[]});if(!("onaddstream"in e.RTCPeerConnection.prototype)){Object.defineProperty(e.RTCPeerConnection.prototype,"onaddstream",{get:function(){return this._onaddstream},set:function(e){var t=this;this._onaddstream&&(this.removeEventListener("addstream",this._onaddstream),this.removeEventListener("track",this._onaddstreampoly)),this.addEventListener("addstream",this._onaddstream=e),this.addEventListener("track",this._onaddstreampoly=function(e){e.streams.forEach((function(e){if(t._remoteStreams||(t._remoteStreams=[]),!t._remoteStreams.includes(e)){t._remoteStreams.push(e);var r=new Event("addstream");r.stream=e,t.dispatchEvent(r)}}))})}});var t=e.RTCPeerConnection.prototype.setRemoteDescription;e.RTCPeerConnection.prototype.setRemoteDescription=function(){var e=this;return this._onaddstreampoly||this.addEventListener("track",this._onaddstreampoly=function(t){t.streams.forEach((function(t){if(e._remoteStreams||(e._remoteStreams=[]),!(e._remoteStreams.indexOf(t)>=0)){e._remoteStreams.push(t);var r=new Event("addstream");r.stream=t,e.dispatchEvent(r)}}))}),t.apply(e,arguments)}}},r.shimCallbacksAPI=function(e){if("object"!==(void 0===e?"undefined":n(e))||!e.RTCPeerConnection)return;var t=e.RTCPeerConnection.prototype,r=t.createOffer,i=t.createAnswer,a=t.setLocalDescription,o=t.setRemoteDescription,s=t.addIceCandidate;t.createOffer=function(e,t){var n=arguments.length>=2?arguments[2]:arguments[0],i=r.apply(this,[n]);return t?(i.then(e,t),Promise.resolve()):i},t.createAnswer=function(e,t){var r=arguments.length>=2?arguments[2]:arguments[0],n=i.apply(this,[r]);return t?(n.then(e,t),Promise.resolve()):n};var c=function(e,t,r){var n=a.apply(this,[e]);return r?(n.then(t,r),Promise.resolve()):n};t.setLocalDescription=c,c=function(e,t,r){var n=o.apply(this,[e]);return r?(n.then(t,r),Promise.resolve()):n},t.setRemoteDescription=c,c=function(e,t,r){var n=s.apply(this,[e]);return r?(n.then(t,r),Promise.resolve()):n},t.addIceCandidate=c},r.shimGetUserMedia=function(e){var t=e&&e.navigator;if(t.mediaDevices&&t.mediaDevices.getUserMedia){var r=t.mediaDevices,n=r.getUserMedia.bind(r);t.mediaDevices.getUserMedia=function(e){return n(a(e))}}!t.getUserMedia&&t.mediaDevices&&t.mediaDevices.getUserMedia&&(t.getUserMedia=function(e,r,n){t.mediaDevices.getUserMedia(e).then(r,n)}.bind(t))},r.shimConstraints=a,r.shimRTCIceServerUrls=function(e){var t=e.RTCPeerConnection;e.RTCPeerConnection=function(e,r){if(e&&e.iceServers){for(var n=[],a=0;a=r&&parseInt(n[r],10)}function s(e){return"[object Object]"===Object.prototype.toString.call(e)}function c(e,t,r){t&&!r.has(t.id)&&(r.set(t.id,t),Object.keys(t).forEach((function(n){n.endsWith("Id")?c(e,e.get(t[n]),r):n.endsWith("Ids")&&t[n].forEach((function(t){c(e,e.get(t),r)}))})))}},{}],16:[function(e,t,r){"use strict";var n=e("sdp");function i(e,t,r,i,a){var o=n.writeRtpDescription(e.kind,t);if(o+=n.writeIceParameters(e.iceGatherer.getLocalParameters()),o+=n.writeDtlsParameters(e.dtlsTransport.getLocalParameters(),"offer"===r?"actpass":a||"active"),o+="a=mid:"+e.mid+"\r\n",e.rtpSender&&e.rtpReceiver?o+="a=sendrecv\r\n":e.rtpSender?o+="a=sendonly\r\n":e.rtpReceiver?o+="a=recvonly\r\n":o+="a=inactive\r\n",e.rtpSender){var s=e.rtpSender._initialTrackId||e.rtpSender.track.id;e.rtpSender._initialTrackId=s;var c="msid:"+(i?i.id:"-")+" "+s+"\r\n";o+="a="+c,o+="a=ssrc:"+e.sendEncodingParameters[0].ssrc+" "+c,e.sendEncodingParameters[0].rtx&&(o+="a=ssrc:"+e.sendEncodingParameters[0].rtx.ssrc+" "+c,o+="a=ssrc-group:FID "+e.sendEncodingParameters[0].ssrc+" "+e.sendEncodingParameters[0].rtx.ssrc+"\r\n")}return o+="a=ssrc:"+e.sendEncodingParameters[0].ssrc+" cname:"+n.localCName+"\r\n",e.rtpSender&&e.sendEncodingParameters[0].rtx&&(o+="a=ssrc:"+e.sendEncodingParameters[0].rtx.ssrc+" cname:"+n.localCName+"\r\n"),o}function a(e,t){var r={codecs:[],headerExtensions:[],fecMechanisms:[]},n=function(e,t){e=parseInt(e,10);for(var r=0;r=14393&&-1===e.indexOf("?transport=udp")})),delete e.url,e.urls=i?n[0]:n,!!n.length}}))}(r.iceServers||[],t),this._iceGatherers=[],r.iceCandidatePoolSize)for(var o=r.iceCandidatePoolSize;o>0;o--)this._iceGatherers.push(new e.RTCIceGatherer({iceServers:r.iceServers,gatherPolicy:r.iceTransportPolicy}));else r.iceCandidatePoolSize=0;this._config=r,this.transceivers=[],this._sdpSessionId=n.generateSessionId(),this._sdpSessionVersion=0,this._dtlsRole=void 0,this._isClosed=!1};Object.defineProperty(p.prototype,"localDescription",{configurable:!0,get:function(){return this._localDescription}}),Object.defineProperty(p.prototype,"remoteDescription",{configurable:!0,get:function(){return this._remoteDescription}}),p.prototype.onicecandidate=null,p.prototype.onaddstream=null,p.prototype.ontrack=null,p.prototype.onremovestream=null,p.prototype.onsignalingstatechange=null,p.prototype.oniceconnectionstatechange=null,p.prototype.onconnectionstatechange=null,p.prototype.onicegatheringstatechange=null,p.prototype.onnegotiationneeded=null,p.prototype.ondatachannel=null,p.prototype._dispatchEvent=function(e,t){this._isClosed||(this.dispatchEvent(t),"function"==typeof this["on"+e]&&this["on"+e](t))},p.prototype._emitGatheringStateChange=function(){var e=new Event("icegatheringstatechange");this._dispatchEvent("icegatheringstatechange",e)},p.prototype.getConfiguration=function(){return this._config},p.prototype.getLocalStreams=function(){return this.localStreams},p.prototype.getRemoteStreams=function(){return this.remoteStreams},p.prototype._createTransceiver=function(e,t){var r=this.transceivers.length>0,n={track:null,iceGatherer:null,iceTransport:null,dtlsTransport:null,localCapabilities:null,remoteCapabilities:null,rtpSender:null,rtpReceiver:null,kind:e,mid:null,sendEncodingParameters:null,recvEncodingParameters:null,stream:null,associatedRemoteMediaStreams:[],wantReceive:!0};if(this.usingBundle&&r)n.iceTransport=this.transceivers[0].iceTransport,n.dtlsTransport=this.transceivers[0].dtlsTransport;else{var i=this._createIceAndDtlsTransports();n.iceTransport=i.iceTransport,n.dtlsTransport=i.dtlsTransport}return t||this.transceivers.push(n),n},p.prototype.addTrack=function(t,r){if(this._isClosed)throw c("InvalidStateError","Attempted to call addTrack on a closed peerconnection.");var n;if(this.transceivers.find((function(e){return e.track===t})))throw c("InvalidAccessError","Track already exists.");for(var i=0;i=15025)e.getTracks().forEach((function(t){r.addTrack(t,e)}));else{var n=e.clone();e.getTracks().forEach((function(e,t){var r=n.getTracks()[t];e.addEventListener("enabled",(function(e){r.enabled=e.enabled}))})),n.getTracks().forEach((function(e){r.addTrack(e,n)}))}},p.prototype.removeTrack=function(t){if(this._isClosed)throw c("InvalidStateError","Attempted to call removeTrack on a closed peerconnection.");if(!(t instanceof e.RTCRtpSender))throw new TypeError("Argument 1 of RTCPeerConnection.removeTrack does not implement interface RTCRtpSender.");var r=this.transceivers.find((function(e){return e.rtpSender===t}));if(!r)throw c("InvalidAccessError","Sender was not created by this connection.");var n=r.stream;r.rtpSender.stop(),r.rtpSender=null,r.track=null,r.stream=null,-1===this.transceivers.map((function(e){return e.stream})).indexOf(n)&&this.localStreams.indexOf(n)>-1&&this.localStreams.splice(this.localStreams.indexOf(n),1),this._maybeFireNegotiationNeeded()},p.prototype.removeStream=function(e){var t=this;e.getTracks().forEach((function(e){var r=t.getSenders().find((function(t){return t.track===e}));r&&t.removeTrack(r)}))},p.prototype.getSenders=function(){return this.transceivers.filter((function(e){return!!e.rtpSender})).map((function(e){return e.rtpSender}))},p.prototype.getReceivers=function(){return this.transceivers.filter((function(e){return!!e.rtpReceiver})).map((function(e){return e.rtpReceiver}))},p.prototype._createIceGatherer=function(t,r){var n=this;if(r&&t>0)return this.transceivers[0].iceGatherer;if(this._iceGatherers.length)return this._iceGatherers.shift();var i=new e.RTCIceGatherer({iceServers:this._config.iceServers,gatherPolicy:this._config.iceTransportPolicy});return Object.defineProperty(i,"state",{value:"new",writable:!0}),this.transceivers[t].bufferedCandidateEvents=[],this.transceivers[t].bufferCandidates=function(e){var r=!e.candidate||0===Object.keys(e.candidate).length;i.state=r?"completed":"gathering",null!==n.transceivers[t].bufferedCandidateEvents&&n.transceivers[t].bufferedCandidateEvents.push(e)},i.addEventListener("localcandidate",this.transceivers[t].bufferCandidates),i},p.prototype._gather=function(t,r){var i=this,a=this.transceivers[r].iceGatherer;if(!a.onlocalcandidate){var o=this.transceivers[r].bufferedCandidateEvents;this.transceivers[r].bufferedCandidateEvents=null,a.removeEventListener("localcandidate",this.transceivers[r].bufferCandidates),a.onlocalcandidate=function(e){if(!(i.usingBundle&&r>0)){var o=new Event("icecandidate");o.candidate={sdpMid:t,sdpMLineIndex:r};var s=e.candidate,c=!s||0===Object.keys(s).length;if(c)"new"!==a.state&&"gathering"!==a.state||(a.state="completed");else{"new"===a.state&&(a.state="gathering"),s.component=1,s.ufrag=a.getLocalParameters().usernameFragment;var d=n.writeCandidate(s);o.candidate=Object.assign(o.candidate,n.parseCandidate(d)),o.candidate.candidate=d,o.candidate.toJSON=function(){return{candidate:o.candidate.candidate,sdpMid:o.candidate.sdpMid,sdpMLineIndex:o.candidate.sdpMLineIndex,usernameFragment:o.candidate.usernameFragment}}}var p=n.getMediaSections(i._localDescription.sdp);p[o.candidate.sdpMLineIndex]+=c?"a=end-of-candidates\r\n":"a="+o.candidate.candidate+"\r\n",i._localDescription.sdp=n.getDescription(i._localDescription.sdp)+p.join("");var u=i.transceivers.every((function(e){return e.iceGatherer&&"completed"===e.iceGatherer.state}));"gathering"!==i.iceGatheringState&&(i.iceGatheringState="gathering",i._emitGatheringStateChange()),c||i._dispatchEvent("icecandidate",o),u&&(i._dispatchEvent("icecandidate",new Event("icecandidate")),i.iceGatheringState="complete",i._emitGatheringStateChange())}},e.setTimeout((function(){o.forEach((function(e){a.onlocalcandidate(e)}))}),0)}},p.prototype._createIceAndDtlsTransports=function(){var t=this,r=new e.RTCIceTransport(null);r.onicestatechange=function(){t._updateIceConnectionState(),t._updateConnectionState()};var n=new e.RTCDtlsTransport(r);return n.ondtlsstatechange=function(){t._updateConnectionState()},n.onerror=function(){Object.defineProperty(n,"state",{value:"failed",writable:!0}),t._updateConnectionState()},{iceTransport:r,dtlsTransport:n}},p.prototype._disposeIceAndDtlsTransports=function(e){var t=this.transceivers[e].iceGatherer;t&&(delete t.onlocalcandidate,delete this.transceivers[e].iceGatherer);var r=this.transceivers[e].iceTransport;r&&(delete r.onicestatechange,delete this.transceivers[e].iceTransport);var n=this.transceivers[e].dtlsTransport;n&&(delete n.ondtlsstatechange,delete n.onerror,delete this.transceivers[e].dtlsTransport)},p.prototype._transceive=function(e,r,i){var o=a(e.localCapabilities,e.remoteCapabilities);r&&e.rtpSender&&(o.encodings=e.sendEncodingParameters,o.rtcp={cname:n.localCName,compound:e.rtcpParameters.compound},e.recvEncodingParameters.length&&(o.rtcp.ssrc=e.recvEncodingParameters[0].ssrc),e.rtpSender.send(o)),i&&e.rtpReceiver&&o.codecs.length>0&&("video"===e.kind&&e.recvEncodingParameters&&t<15019&&e.recvEncodingParameters.forEach((function(e){delete e.rtx})),e.recvEncodingParameters.length?o.encodings=e.recvEncodingParameters:o.encodings=[{}],o.rtcp={compound:e.rtcpParameters.compound},e.rtcpParameters.cname&&(o.rtcp.cname=e.rtcpParameters.cname),e.sendEncodingParameters.length&&(o.rtcp.ssrc=e.sendEncodingParameters[0].ssrc),e.rtpReceiver.receive(o))},p.prototype.setLocalDescription=function(e){var t,r,i=this;if(-1===["offer","answer"].indexOf(e.type))return Promise.reject(c("TypeError",'Unsupported type "'+e.type+'"'));if(!o("setLocalDescription",e.type,i.signalingState)||i._isClosed)return Promise.reject(c("InvalidStateError","Can not set local "+e.type+" in state "+i.signalingState));if("offer"===e.type)t=n.splitSections(e.sdp),r=t.shift(),t.forEach((function(e,t){var r=n.parseRtpParameters(e);i.transceivers[t].localCapabilities=r})),i.transceivers.forEach((function(e,t){i._gather(e.mid,t)}));else if("answer"===e.type){t=n.splitSections(i._remoteDescription.sdp),r=t.shift();var s=n.matchPrefix(r,"a=ice-lite").length>0;t.forEach((function(e,t){var o=i.transceivers[t],c=o.iceGatherer,d=o.iceTransport,p=o.dtlsTransport,u=o.localCapabilities,f=o.remoteCapabilities;if(!(n.isRejected(e)&&0===n.matchPrefix(e,"a=bundle-only").length)&&!o.rejected){var l=n.getIceParameters(e,r),m=n.getDtlsParameters(e,r);s&&(m.role="server"),i.usingBundle&&0!==t||(i._gather(o.mid,t),"new"===d.state&&d.start(c,l,s?"controlling":"controlled"),"new"===p.state&&p.start(m));var h=a(u,f);i._transceive(o,h.codecs.length>0,!1)}}))}return i._localDescription={type:e.type,sdp:e.sdp},"offer"===e.type?i._updateSignalingState("have-local-offer"):i._updateSignalingState("stable"),Promise.resolve()},p.prototype.setRemoteDescription=function(i){var p=this;if(-1===["offer","answer"].indexOf(i.type))return Promise.reject(c("TypeError",'Unsupported type "'+i.type+'"'));if(!o("setRemoteDescription",i.type,p.signalingState)||p._isClosed)return Promise.reject(c("InvalidStateError","Can not set remote "+i.type+" in state "+p.signalingState));var u={};p.remoteStreams.forEach((function(e){u[e.id]=e}));var f=[],l=n.splitSections(i.sdp),m=l.shift(),h=n.matchPrefix(m,"a=ice-lite").length>0,v=n.matchPrefix(m,"a=group:BUNDLE ").length>0;p.usingBundle=v;var y=n.matchPrefix(m,"a=ice-options:")[0];return p.canTrickleIceCandidates=!!y&&y.substr(14).split(" ").indexOf("trickle")>=0,l.forEach((function(o,c){var d=n.splitLines(o),l=n.getKind(o),y=n.isRejected(o)&&0===n.matchPrefix(o,"a=bundle-only").length,g=d[0].substr(2).split(" ")[2],C=n.getDirection(o,m),S=n.parseMsid(o),T=n.getMid(o)||n.generateIdentifier();if(y||"application"===l&&("DTLS/SCTP"===g||"UDP/DTLS/SCTP"===g))p.transceivers[c]={mid:T,kind:l,protocol:g,rejected:!0};else{var P,R,b,E,_,w,k,x,M;!y&&p.transceivers[c]&&p.transceivers[c].rejected&&(p.transceivers[c]=p._createTransceiver(l,!0));var D,O,I=n.parseRtpParameters(o);y||(D=n.getIceParameters(o,m),(O=n.getDtlsParameters(o,m)).role="client"),k=n.parseRtpEncodingParameters(o);var j=n.parseRtcpParameters(o),L=n.matchPrefix(o,"a=end-of-candidates",m).length>0,G=n.matchPrefix(o,"a=candidate:").map((function(e){return n.parseCandidate(e)})).filter((function(e){return 1===e.component}));if(("offer"===i.type||"answer"===i.type)&&!y&&v&&c>0&&p.transceivers[c]&&(p._disposeIceAndDtlsTransports(c),p.transceivers[c].iceGatherer=p.transceivers[0].iceGatherer,p.transceivers[c].iceTransport=p.transceivers[0].iceTransport,p.transceivers[c].dtlsTransport=p.transceivers[0].dtlsTransport,p.transceivers[c].rtpSender&&p.transceivers[c].rtpSender.setTransport(p.transceivers[0].dtlsTransport),p.transceivers[c].rtpReceiver&&p.transceivers[c].rtpReceiver.setTransport(p.transceivers[0].dtlsTransport)),"offer"!==i.type||y){if("answer"===i.type&&!y){R=(P=p.transceivers[c]).iceGatherer,b=P.iceTransport,E=P.dtlsTransport,_=P.rtpReceiver,w=P.sendEncodingParameters,x=P.localCapabilities,p.transceivers[c].recvEncodingParameters=k,p.transceivers[c].remoteCapabilities=I,p.transceivers[c].rtcpParameters=j,G.length&&"new"===b.state&&(!h&&!L||v&&0!==c?G.forEach((function(e){s(P.iceTransport,e)})):b.setRemoteCandidates(G)),v&&0!==c||("new"===b.state&&b.start(R,D,"controlling"),"new"===E.state&&E.start(O)),!a(P.localCapabilities,P.remoteCapabilities).codecs.filter((function(e){return"rtx"===e.name.toLowerCase()})).length&&P.sendEncodingParameters[0].rtx&&delete P.sendEncodingParameters[0].rtx,p._transceive(P,"sendrecv"===C||"recvonly"===C,"sendrecv"===C||"sendonly"===C),!_||"sendrecv"!==C&&"sendonly"!==C?delete P.rtpReceiver:(M=_.track,S?(u[S.stream]||(u[S.stream]=new e.MediaStream),r(M,u[S.stream]),f.push([M,_,u[S.stream]])):(u.default||(u.default=new e.MediaStream),r(M,u.default),f.push([M,_,u.default])))}}else{(P=p.transceivers[c]||p._createTransceiver(l)).mid=T,P.iceGatherer||(P.iceGatherer=p._createIceGatherer(c,v)),G.length&&"new"===P.iceTransport.state&&(!L||v&&0!==c?G.forEach((function(e){s(P.iceTransport,e)})):P.iceTransport.setRemoteCandidates(G)),x=e.RTCRtpReceiver.getCapabilities(l),t<15019&&(x.codecs=x.codecs.filter((function(e){return"rtx"!==e.name}))),w=P.sendEncodingParameters||[{ssrc:1001*(2*c+2)}];var A,N=!1;if("sendrecv"===C||"sendonly"===C){if(N=!P.rtpReceiver,_=P.rtpReceiver||new e.RTCRtpReceiver(P.dtlsTransport,l),N)M=_.track,S&&"-"===S.stream||(S?(u[S.stream]||(u[S.stream]=new e.MediaStream,Object.defineProperty(u[S.stream],"id",{get:function(){return S.stream}})),Object.defineProperty(M,"id",{get:function(){return S.track}}),A=u[S.stream]):(u.default||(u.default=new e.MediaStream),A=u.default)),A&&(r(M,A),P.associatedRemoteMediaStreams.push(A)),f.push([M,_,A])}else P.rtpReceiver&&P.rtpReceiver.track&&(P.associatedRemoteMediaStreams.forEach((function(t){var r=t.getTracks().find((function(e){return e.id===P.rtpReceiver.track.id}));r&&function(t,r){r.removeTrack(t),r.dispatchEvent(new e.MediaStreamTrackEvent("removetrack",{track:t}))}(r,t)})),P.associatedRemoteMediaStreams=[]);P.localCapabilities=x,P.remoteCapabilities=I,P.rtpReceiver=_,P.rtcpParameters=j,P.sendEncodingParameters=w,P.recvEncodingParameters=k,p._transceive(p.transceivers[c],!1,N)}}})),void 0===p._dtlsRole&&(p._dtlsRole="offer"===i.type?"active":"passive"),p._remoteDescription={type:i.type,sdp:i.sdp},"offer"===i.type?p._updateSignalingState("have-remote-offer"):p._updateSignalingState("stable"),Object.keys(u).forEach((function(t){var r=u[t];if(r.getTracks().length){if(-1===p.remoteStreams.indexOf(r)){p.remoteStreams.push(r);var n=new Event("addstream");n.stream=r,e.setTimeout((function(){p._dispatchEvent("addstream",n)}))}f.forEach((function(e){var t=e[0],n=e[1];r.id===e[2].id&&d(p,t,n,[r])}))}})),f.forEach((function(e){e[2]||d(p,e[0],e[1],[])})),e.setTimeout((function(){p&&p.transceivers&&p.transceivers.forEach((function(e){e.iceTransport&&"new"===e.iceTransport.state&&e.iceTransport.getRemoteCandidates().length>0&&(console.warn("Timeout for addRemoteCandidate. Consider sending an end-of-candidates notification"),e.iceTransport.addRemoteCandidate({}))}))}),4e3),Promise.resolve()},p.prototype.close=function(){this.transceivers.forEach((function(e){e.iceTransport&&e.iceTransport.stop(),e.dtlsTransport&&e.dtlsTransport.stop(),e.rtpSender&&e.rtpSender.stop(),e.rtpReceiver&&e.rtpReceiver.stop()})),this._isClosed=!0,this._updateSignalingState("closed")},p.prototype._updateSignalingState=function(e){this.signalingState=e;var t=new Event("signalingstatechange");this._dispatchEvent("signalingstatechange",t)},p.prototype._maybeFireNegotiationNeeded=function(){var t=this;"stable"===this.signalingState&&!0!==this.needNegotiation&&(this.needNegotiation=!0,e.setTimeout((function(){if(t.needNegotiation){t.needNegotiation=!1;var e=new Event("negotiationneeded");t._dispatchEvent("negotiationneeded",e)}}),0))},p.prototype._updateIceConnectionState=function(){var e,t={new:0,closed:0,checking:0,connected:0,completed:0,disconnected:0,failed:0};if(this.transceivers.forEach((function(e){e.iceTransport&&!e.rejected&&t[e.iceTransport.state]++})),e="new",t.failed>0?e="failed":t.checking>0?e="checking":t.disconnected>0?e="disconnected":t.new>0?e="new":t.connected>0?e="connected":t.completed>0&&(e="completed"),e!==this.iceConnectionState){this.iceConnectionState=e;var r=new Event("iceconnectionstatechange");this._dispatchEvent("iceconnectionstatechange",r)}},p.prototype._updateConnectionState=function(){var e,t={new:0,closed:0,connecting:0,connected:0,completed:0,disconnected:0,failed:0};if(this.transceivers.forEach((function(e){e.iceTransport&&e.dtlsTransport&&!e.rejected&&(t[e.iceTransport.state]++,t[e.dtlsTransport.state]++)})),t.connected+=t.completed,e="new",t.failed>0?e="failed":t.connecting>0?e="connecting":t.disconnected>0?e="disconnected":t.new>0?e="new":t.connected>0&&(e="connected"),e!==this.connectionState){this.connectionState=e;var r=new Event("connectionstatechange");this._dispatchEvent("connectionstatechange",r)}},p.prototype.createOffer=function(){var r=this;if(r._isClosed)return Promise.reject(c("InvalidStateError","Can not call createOffer after close"));var a=r.transceivers.filter((function(e){return"audio"===e.kind})).length,o=r.transceivers.filter((function(e){return"video"===e.kind})).length,s=arguments[0];if(s){if(s.mandatory||s.optional)throw new TypeError("Legacy mandatory/optional constraints not supported.");void 0!==s.offerToReceiveAudio&&(a=!0===s.offerToReceiveAudio?1:!1===s.offerToReceiveAudio?0:s.offerToReceiveAudio),void 0!==s.offerToReceiveVideo&&(o=!0===s.offerToReceiveVideo?1:!1===s.offerToReceiveVideo?0:s.offerToReceiveVideo)}for(r.transceivers.forEach((function(e){"audio"===e.kind?--a<0&&(e.wantReceive=!1):"video"===e.kind&&--o<0&&(e.wantReceive=!1)}));a>0||o>0;)a>0&&(r._createTransceiver("audio"),a--),o>0&&(r._createTransceiver("video"),o--);var d=n.writeSessionBoilerplate(r._sdpSessionId,r._sdpSessionVersion++);r.transceivers.forEach((function(i,a){var o=i.track,s=i.kind,c=i.mid||n.generateIdentifier();i.mid=c,i.iceGatherer||(i.iceGatherer=r._createIceGatherer(a,r.usingBundle));var d=e.RTCRtpSender.getCapabilities(s);t<15019&&(d.codecs=d.codecs.filter((function(e){return"rtx"!==e.name}))),d.codecs.forEach((function(e){"H264"===e.name&&void 0===e.parameters["level-asymmetry-allowed"]&&(e.parameters["level-asymmetry-allowed"]="1"),i.remoteCapabilities&&i.remoteCapabilities.codecs&&i.remoteCapabilities.codecs.forEach((function(t){e.name.toLowerCase()===t.name.toLowerCase()&&e.clockRate===t.clockRate&&(e.preferredPayloadType=t.payloadType)}))})),d.headerExtensions.forEach((function(e){(i.remoteCapabilities&&i.remoteCapabilities.headerExtensions||[]).forEach((function(t){e.uri===t.uri&&(e.id=t.id)}))}));var p=i.sendEncodingParameters||[{ssrc:1001*(2*a+1)}];o&&t>=15019&&"video"===s&&!p[0].rtx&&(p[0].rtx={ssrc:p[0].ssrc+1}),i.wantReceive&&(i.rtpReceiver=new e.RTCRtpReceiver(i.dtlsTransport,s)),i.localCapabilities=d,i.sendEncodingParameters=p})),"max-compat"!==r._config.bundlePolicy&&(d+="a=group:BUNDLE "+r.transceivers.map((function(e){return e.mid})).join(" ")+"\r\n"),d+="a=ice-options:trickle\r\n",r.transceivers.forEach((function(e,t){d+=i(e,e.localCapabilities,"offer",e.stream,r._dtlsRole),d+="a=rtcp-rsize\r\n",!e.iceGatherer||"new"===r.iceGatheringState||0!==t&&r.usingBundle||(e.iceGatherer.getLocalCandidates().forEach((function(e){e.component=1,d+="a="+n.writeCandidate(e)+"\r\n"})),"completed"===e.iceGatherer.state&&(d+="a=end-of-candidates\r\n"))}));var p=new e.RTCSessionDescription({type:"offer",sdp:d});return Promise.resolve(p)},p.prototype.createAnswer=function(){var r=this;if(r._isClosed)return Promise.reject(c("InvalidStateError","Can not call createAnswer after close"));if("have-remote-offer"!==r.signalingState&&"have-local-pranswer"!==r.signalingState)return Promise.reject(c("InvalidStateError","Can not call createAnswer in signalingState "+r.signalingState));var o=n.writeSessionBoilerplate(r._sdpSessionId,r._sdpSessionVersion++);r.usingBundle&&(o+="a=group:BUNDLE "+r.transceivers.map((function(e){return e.mid})).join(" ")+"\r\n"),o+="a=ice-options:trickle\r\n";var s=n.getMediaSections(r._remoteDescription.sdp).length;r.transceivers.forEach((function(e,n){if(!(n+1>s)){if(e.rejected)return"application"===e.kind?"DTLS/SCTP"===e.protocol?o+="m=application 0 DTLS/SCTP 5000\r\n":o+="m=application 0 "+e.protocol+" webrtc-datachannel\r\n":"audio"===e.kind?o+="m=audio 0 UDP/TLS/RTP/SAVPF 0\r\na=rtpmap:0 PCMU/8000\r\n":"video"===e.kind&&(o+="m=video 0 UDP/TLS/RTP/SAVPF 120\r\na=rtpmap:120 VP8/90000\r\n"),void(o+="c=IN IP4 0.0.0.0\r\na=inactive\r\na=mid:"+e.mid+"\r\n");var 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o=e.sdpMLineIndex;if(e.sdpMid)for(var d=0;d0?n.parseCandidate(e.candidate):{};if("tcp"===u.protocol&&(0===u.port||9===u.port))return i();if(u.component&&1!==u.component)return i();if((0===o||o>0&&p.iceTransport!==r.transceivers[0].iceTransport)&&!s(p.iceTransport,u))return a(c("OperationError","Can not add ICE candidate"));var f=e.candidate.trim();0===f.indexOf("a=")&&(f=f.substr(2)),(t=n.getMediaSections(r._remoteDescription.sdp))[o]+="a="+(u.type?f:"end-of-candidates")+"\r\n",r._remoteDescription.sdp=n.getDescription(r._remoteDescription.sdp)+t.join("")}else for(var l=0;l0?t[0].split("/")[1]:"sendrecv",uri:t[1]}},n.writeExtmap=function(e){return"a=extmap:"+(e.id||e.preferredId)+(e.direction&&"sendrecv"!==e.direction?"/"+e.direction:"")+" "+e.uri+"\r\n"},n.parseFmtp=function(e){for(var t,r={},n=e.substr(e.indexOf(" ")+1).split(";"),i=0;i-1?(r.attribute=e.substr(t+1,n-t-1),r.value=e.substr(n+1)):r.attribute=e.substr(t+1),r},n.parseSsrcGroup=function(e){var t=e.substr(13).split(" 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diff --git a/web/html/js/dash-v4.5.1.all.min.js b/web/html/js/dash-v4.5.1.all.min.js
new file mode 100644
index 0000000..cbba9a0
--- /dev/null
+++ b/web/html/js/dash-v4.5.1.all.min.js
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this.size+=e>>3},a.prototype._writeString=function(e,t){for(var n=0;n>10&31),96+(this.language>>5&31),96+(31&this.language))),this._procField("pre_defined","uint",16)},a.prototype._boxProcessors.mehd=function(){this._procFullBox(),this._procField("fragment_duration","uint",1==this.version?64:32)},a.prototype._boxProcessors.mfhd=function(){this._procFullBox(),this._procField("sequence_number","uint",32)},a.prototype._boxProcessors.mfro=function(){this._procFullBox(),this._procField("mfra_size","uint",32)},a.prototype._boxProcessors.mp4a=a.prototype._boxProcessors.enca=function(){this._procFieldArray("reserved1",6,"uint",8),this._procField("data_reference_index","uint",16),this._procFieldArray("reserved2",2,"uint",32),this._procField("channelcount","uint",16),this._procField("samplesize","uint",16),this._procField("pre_defined","uint",16),this._procField("reserved3","uint",16),this._procField("samplerate","template",32),this._procField("esds","data",-1)},a.prototype._boxProcessors.mvhd=function(){this._procFullBox(),this._procField("creation_time","uint",1==this.version?64:32),this._procField("modification_time","uint",1==this.version?64:32),this._procField("timescale","uint",32),this._procField("duration","uint",1==this.version?64:32),this._procField("rate","template",32),this._procField("volume","template",16),this._procField("reserved1","uint",16),this._procFieldArray("reserved2",2,"uint",32),this._procFieldArray("matrix",9,"template",32),this._procFieldArray("pre_defined",6,"uint",32),this._procField("next_track_ID","uint",32)},a.prototype._boxProcessors.payl=function(){this._procField("cue_text","utf8")},a.prototype._boxProcessors.pssh=function(){this._procFullBox(),this._procFieldArray("SystemID",16,"uint",8),this._procField("DataSize","uint",32),this._procFieldArray("Data",this.DataSize,"uint",8)},a.prototype._boxProcessors.schm=function(){this._procFullBox(),this._procField("scheme_type","uint",32),this._procField("scheme_version","uint",32),1&this.flags&&this._procField("scheme_uri","string",-1)},a.prototype._boxProcessors.sdtp=function(){this._procFullBox();var e=-1;this._parsing&&(e=this._raw.byteLength-(this._cursor.offset-this._raw.byteOffset)),this._procFieldArray("sample_dependency_table",e,"uint",8)},a.prototype._boxProcessors.sidx=function(){this._procFullBox(),this._procField("reference_ID","uint",32),this._procField("timescale","uint",32),this._procField("earliest_presentation_time","uint",1==this.version?64:32),this._procField("first_offset","uint",1==this.version?64:32),this._procField("reserved","uint",16),this._procField("reference_count","uint",16),this._procEntries("references",this.reference_count,(function(e){this._parsing||(e.reference=(1&e.reference_type)<<31,e.reference|=2147483647&e.referenced_size,e.sap=(1&e.starts_with_SAP)<<31,e.sap|=(3&e.SAP_type)<<28,e.sap|=268435455&e.SAP_delta_time),this._procEntryField(e,"reference","uint",32),this._procEntryField(e,"subsegment_duration","uint",32),this._procEntryField(e,"sap","uint",32),this._parsing&&(e.reference_type=e.reference>>31&1,e.referenced_size=2147483647&e.reference,e.starts_with_SAP=e.sap>>31&1,e.SAP_type=e.sap>>28&7,e.SAP_delta_time=268435455&e.sap)}))},a.prototype._boxProcessors.smhd=function(){this._procFullBox(),this._procField("balance","uint",16),this._procField("reserved","uint",16)},a.prototype._boxProcessors.ssix=function(){this._procFullBox(),this._procField("subsegment_count","uint",32),this._procEntries("subsegments",this.subsegment_count,(function(e){this._procEntryField(e,"ranges_count","uint",32),this._procSubEntries(e,"ranges",e.ranges_count,(function(e){this._procEntryField(e,"level","uint",8),this._procEntryField(e,"range_size","uint",24)}))}))},a.prototype._boxProcessors.stsd=function(){this._procFullBox(),this._procField("entry_count","uint",32),this._procSubBoxes("entries",this.entry_count)},a.prototype._boxProcessors.subs=function(){this._procFullBox(),this._procField("entry_count","uint",32),this._procEntries("entries",this.entry_count,(function(e){this._procEntryField(e,"sample_delta","uint",32),this._procEntryField(e,"subsample_count","uint",16),this._procSubEntries(e,"subsamples",e.subsample_count,(function(e){this._procEntryField(e,"subsample_size","uint",1===this.version?32:16),this._procEntryField(e,"subsample_priority","uint",8),this._procEntryField(e,"discardable","uint",8),this._procEntryField(e,"codec_specific_parameters","uint",32)}))}))},a.prototype._boxProcessors.tenc=function(){this._procFullBox(),this._procField("default_IsEncrypted","uint",24),this._procField("default_IV_size","uint",8),this._procFieldArray("default_KID",16,"uint",8)},a.prototype._boxProcessors.tfdt=function(){this._procFullBox(),this._procField("baseMediaDecodeTime","uint",1==this.version?64:32)},a.prototype._boxProcessors.tfhd=function(){this._procFullBox(),this._procField("track_ID","uint",32),1&this.flags&&this._procField("base_data_offset","uint",64),2&this.flags&&this._procField("sample_description_offset","uint",32),8&this.flags&&this._procField("default_sample_duration","uint",32),16&this.flags&&this._procField("default_sample_size","uint",32),32&this.flags&&this._procField("default_sample_flags","uint",32)},a.prototype._boxProcessors.tfra=function(){this._procFullBox(),this._procField("track_ID","uint",32),this._parsing||(this.reserved=0,this.reserved|=(48&this.length_size_of_traf_num)<<4,this.reserved|=(12&this.length_size_of_trun_num)<<2,this.reserved|=3&this.length_size_of_sample_num),this._procField("reserved","uint",32),this._parsing&&(this.length_size_of_traf_num=(48&this.reserved)>>4,this.length_size_of_trun_num=(12&this.reserved)>>2,this.length_size_of_sample_num=3&this.reserved),this._procField("number_of_entry","uint",32),this._procEntries("entries",this.number_of_entry,(function(e){this._procEntryField(e,"time","uint",1===this.version?64:32),this._procEntryField(e,"moof_offset","uint",1===this.version?64:32),this._procEntryField(e,"traf_number","uint",8*(this.length_size_of_traf_num+1)),this._procEntryField(e,"trun_number","uint",8*(this.length_size_of_trun_num+1)),this._procEntryField(e,"sample_number","uint",8*(this.length_size_of_sample_num+1))}))},a.prototype._boxProcessors.tkhd=function(){this._procFullBox(),this._procField("creation_time","uint",1==this.version?64:32),this._procField("modification_time","uint",1==this.version?64:32),this._procField("track_ID","uint",32),this._procField("reserved1","uint",32),this._procField("duration","uint",1==this.version?64:32),this._procFieldArray("reserved2",2,"uint",32),this._procField("layer","uint",16),this._procField("alternate_group","uint",16),this._procField("volume","template",16),this._procField("reserved3","uint",16),this._procFieldArray("matrix",9,"template",32),this._procField("width","template",32),this._procField("height","template",32)},a.prototype._boxProcessors.trex=function(){this._procFullBox(),this._procField("track_ID","uint",32),this._procField("default_sample_description_index","uint",32),this._procField("default_sample_duration","uint",32),this._procField("default_sample_size","uint",32),this._procField("default_sample_flags","uint",32)},a.prototype._boxProcessors.trun=function(){this._procFullBox(),this._procField("sample_count","uint",32),1&this.flags&&this._procField("data_offset","int",32),4&this.flags&&this._procField("first_sample_flags","uint",32),this._procEntries("samples",this.sample_count,(function(e){256&this.flags&&this._procEntryField(e,"sample_duration","uint",32),512&this.flags&&this._procEntryField(e,"sample_size","uint",32),1024&this.flags&&this._procEntryField(e,"sample_flags","uint",32),2048&this.flags&&this._procEntryField(e,"sample_composition_time_offset",1===this.version?"int":"uint",32)}))},a.prototype._boxProcessors["url "]=a.prototype._boxProcessors["urn "]=function(){this._procFullBox(),"urn "===this.type&&this._procField("name","string",-1),this._procField("location","string",-1)},a.prototype._boxProcessors.vlab=function(){this._procField("source_label","utf8")},a.prototype._boxProcessors.vmhd=function(){this._procFullBox(),this._procField("graphicsmode","uint",16),this._procFieldArray("opcolor",3,"uint",16)},a.prototype._boxProcessors.vttC=function(){this._procField("config","utf8")},a.prototype._boxProcessors.vtte=function(){}},function(e,t){var n,r,i=e.exports={};function a(){throw new Error("setTimeout has not been defined")}function o(){throw new Error("clearTimeout has not been defined")}function s(e){if(n===setTimeout)return setTimeout(e,0);if((n===a||!n)&&setTimeout)return n=setTimeout,setTimeout(e,0);try{return n(e,0)}catch(t){try{return n.call(null,e,0)}catch(t){return n.call(this,e,0)}}}!function(){try{n="function"==typeof setTimeout?setTimeout:a}catch(e){n=a}try{r="function"==typeof clearTimeout?clearTimeout:o}catch(e){r=o}}();var u,l=[],c=!1,f=-1;function d(){c&&u&&(c=!1,u.length?l=u.concat(l):f=-1,l.length&&h())}function h(){if(!c){var e=s(d);c=!0;for(var t=l.length;t;){for(u=l,l=[];++f1)for(var n=1;n0&&r[e.mediaType].ignoreCount--}return t={getMaxIndex:function(e){var t=Object(i.a)(s).create();if(!e||!e.hasOwnProperty("getMediaType"))return t;!function(){if(!h||!h.hasOwnProperty("getCurrentBufferLevel")||!h.hasOwnProperty("getCurrentBufferState"))throw new Error(a.a.MISSING_CONFIG_ERROR)}();var u=e.getMediaType(),l=h.getCurrentBufferState(u),c=e.getRepresentationInfo().fragmentDuration,f=e.getStreamInfo(),d=f?f.id:null,g=e.getScheduleController(),p=f&&f.manifestInfo&&f.manifestInfo.isDynamic;if(function(e,t){return!e&&r[t].ignoreCount>0}(g.getPlaybackController().getLowLatencyModeEnabled(),u)||!c)return t;if(l&&l.state===o.a.BUFFER_EMPTY)n.debug("["+u+"] Switch to index 0; buffer is empty."),t.quality=0,t.reason="InsufficientBufferRule: Buffer is empty";else{var m=e.getMediaInfo(),y=e.getAbrController(),E=y.getThroughputHistory(),v=h.getCurrentBufferLevel(u),_=E.getAverageThroughput(u,p),T=E.getAverageLatency(u),b=_*(v/c)*.5;t.quality=y.getQualityForBitrate(m,b,d,T),t.reason="InsufficientBufferRule: being conservative to avoid immediate rebuffering"}return t},reset:function(){g(),u.off(d.a.PLAYBACK_SEEKING,p,t),u.off(c.a.BYTES_APPENDED_END_FRAGMENT,m,t)}},n=Object(f.a)(s).getInstance().getLogger(t),g(),u.on(d.a.PLAYBACK_SEEKING,p,t),u.on(c.a.BYTES_APPENDED_END_FRAGMENT,m,t),t}h.__dashjs_factory_name="InsufficientBufferRule";var g=r.a.getClassFactory(h);function p(e){e=e||{};var t,n,r,a,o,s=this.context,u=e.mediaPlayerModel,l=e.dashMetrics,c=e.settings;function d(){r={},a={},o=[]}return t={shouldAbandon:function(e){var t=Object(i.a)(s).create(i.a.NO_CHANGE,{name:p.__dashjs_factory_name});if(!(e&&e.hasOwnProperty("getMediaInfo")&&e.hasOwnProperty("getMediaType")&&e.hasOwnProperty("getCurrentRequest")&&e.hasOwnProperty("getRepresentationInfo")&&e.hasOwnProperty("getAbrController")))return t;var f,d,h=e.getMediaInfo(),g=e.getMediaType(),m=e.getStreamInfo(),y=m?m.id:null,E=e.getCurrentRequest();if(!isNaN(E.index)){f=g,d=E.index,r[f]=r[f]||{},r[f][d]=r[f][d]||{};var v=u.getStableBufferTime();if(l.getCurrentBufferLevel(g)>v)return t;var _=r[g][E.index];if(null===_||null===E.firstByteDate||a.hasOwnProperty(_.id))return t;if(void 0===_.firstByteTime&&(o[g]=[],_.firstByteTime=E.firstByteDate.getTime(),_.segmentDuration=E.duration,_.bytesTotal=E.bytesTotal,_.id=E.index),_.bytesLoaded=E.bytesLoaded,_.elapsedTime=(new Date).getTime()-_.firstByteTime,_.bytesLoaded>0&&_.elapsedTime>0&&function(e,t){o[e]=o[e]||[],o[e].push(t)}(g,Math.round(8*_.bytesLoaded/_.elapsedTime)),o[g].length>=5&&_.elapsedTime>500&&_.bytesLoaded<_.bytesTotal){var T=o[g].reduce((function(e,t){return e+t}),0);if(_.measuredBandwidthInKbps=Math.round(T/o[g].length),_.estimatedTimeOfDownload=+(8*_.bytesTotal/_.measuredBandwidthInKbps/1e3).toFixed(2),_.estimatedTimeOfDownload<1.8*_.segmentDuration||0===e.getRepresentationInfo().quality)return t;if(!a.hasOwnProperty(_.id)){var b=e.getAbrController(),S=_.bytesTotal-_.bytesLoaded,A=b.getBitrateList(h),I=b.getQualityForBitrate(h,_.measuredBandwidthInKbps*c.get().streaming.abr.bandwidthSafetyFactor,y),R=b.getMinAllowedIndexFor(g,y),w=void 0!==R?Math.max(R,I):I;S>_.bytesTotal*A[w].bitrate/A[b.getQualityFor(g,y)].bitrate&&(t.quality=w,t.reason.throughput=_.measuredBandwidthInKbps,t.reason.fragmentID=_.id,a[_.id]=_,n.debug("["+g+"] frag id",_.id," is asking to abandon and switch to quality to ",w," measured bandwidth was",_.measuredBandwidthInKbps),delete r[g][_.id])}}else _.bytesLoaded===_.bytesTotal&&delete r[g][_.id]}return t},reset:d},n=Object(f.a)(s).getInstance().getLogger(t),d(),t}p.__dashjs_factory_name="AbandonRequestsRule";var m=r.a.getClassFactory(p);function y(){var e,t,n=this.context;return e={getMaxIndex:function(e){var r=Object(i.a)(n).create();if(!e||!e.hasOwnProperty("getDroppedFramesHistory"))return r;var a=e.getDroppedFramesHistory(),o=e.getStreamInfo().id;if(a){var s=a.getFrameHistory(o);if(!s||0===s.length)return r;for(var u=0,l=0,c=i.a.NO_CHANGE,f=1;f375&&u/l>.15)){c=f-1,t.debug("index: "+c+" Dropped Frames: "+u+" Total Frames: "+l);break}return Object(i.a)(n).create(c,{droppedFrames:u})}return r}},t=Object(f.a)(n).getInstance().getLogger(e),e}y.__dashjs_factory_name="DroppedFramesRule";var E=r.a.getClassFactory(y);function v(){var e,t,n=this.context;return e={getMaxIndex:function(e){for(var r=e?e.getSwitchHistory():null,a=r?r.getSwitchRequests():[],o=0,s=0,u=0,l=Object(i.a)(n).create(),c=0;c=6&&o/s>.075)){l.quality=c>0&&a[c].drops>0?c-1:c,l.reason={index:l.quality,drops:o,noDrops:s,dropSize:u},t.debug("Switch history rule index: "+l.quality+" samples: "+(o+s)+" drops: "+o);break}return l}},t=Object(f.a)(n).getInstance().getLogger(e),e}v.__dashjs_factory_name="SwitchHistoryRule";var _=r.a.getClassFactory(v),T=n(5);function b(e){e=e||{};var t,n,r,s=this.context,u=e.dashMetrics,h=e.mediaPlayerModel,g=Object(l.a)(s).getInstance();function p(e,t,n){var r=n.reduce((function(e,t,r){return t>n[e]?r:e}),0);if(0===r)return null;var i=Math.max(e,10+2*t.length),a=(n[r]-1)/(i/10-1);return{gp:a,Vp:10/a}}function m(e){var t={},n=e.getMediaInfo().bitrateList.map((function(e){return e.bandwidth})),r=function(e){return e.map((function(e){return Math.log(e)}))}(n);r=r.map((function(e){return e-r[0]+1}));var i=h.getStableBufferTime(),a=p(i,n,r);return a?(t.state=1,t.bitrates=n,t.utilities=r,t.stableBufferTime=i,t.Vp=a.Vp,t.gp=a.gp,t.lastQuality=0,y(t)):t.state=0,t}function y(e){e.placeholderBuffer=0,e.mostAdvancedSegmentStart=NaN,e.lastSegmentWasReplacement=!1,e.lastSegmentStart=NaN,e.lastSegmentDurationS=NaN,e.lastSegmentRequestTimeMs=NaN,e.lastSegmentFinishTimeMs=NaN}function E(e,t){var n=h.getStableBufferTime();if(e.stableBufferTime!==n){var r=p(n,e.bitrates,e.utilities);if(r.Vp!==e.Vp||r.gp!==e.gp){var i=u.getCurrentBufferLevel(t),a=i+e.placeholderBuffer;a-=10,a*=r.Vp/e.Vp,a+=10,e.stableBufferTime=n,e.Vp=r.Vp,e.gp=r.gp,e.placeholderBuffer=Math.max(0,a-i)}}}function v(e,t){return e.Vp*(e.utilities[t]+e.gp)}function _(e,t){for(var n=e.bitrates[t],r=e.utilities[t],i=0,a=t-1;a>=0;--a)if(e.utilities[a]t.mostAdvancedSegmentStart?(t.mostAdvancedSegmentStart=n,t.lastSegmentWasReplacement=!1):t.lastSegmentWasReplacement=!0,t.lastSegmentStart=n,t.lastSegmentDurationS=e.chunk.duration,t.lastQuality=e.chunk.quality,R(t,e.chunk.mediaInfo.type)}}}function I(e){if(e&&e.metric===o.a.HTTP_REQUEST&&e.value&&e.value.type===T.a.MEDIA_SEGMENT_TYPE&&e.value.trace&&e.value.trace.length){var t=r[e.mediaType];t&&0!==t.state&&(t.lastSegmentRequestTimeMs=e.value.trequest.getTime(),t.lastSegmentFinishTimeMs=e.value._tfinish.getTime(),R(t,e.mediaType))}}function R(e,t){if(!isNaN(e.lastSegmentStart)&&!isNaN(e.lastSegmentRequestTimeMs)&&!isNaN(e.placeholderBuffer)){if(e.placeholderBuffer*=.99,!isNaN(e.lastSegmentFinishTimeMs)){var n=u.getCurrentBufferLevel(t)+.001*(e.lastSegmentFinishTimeMs-e.lastSegmentRequestTimeMs),r=v(e,e.lastQuality),i=Math.max(0,r-n);e.placeholderBuffer=Math.min(i,e.placeholderBuffer)}e.lastSegmentWasReplacement&&!isNaN(e.lastSegmentDurationS)&&(e.placeholderBuffer+=e.lastSegmentDurationS),e.lastSegmentStart=NaN,e.lastSegmentRequestTimeMs=NaN}}function w(e){if(e){var t=r[e.mediaType];t&&0!==t.state&&(t.abrQuality=e.newQuality)}}function N(e){if(e){var t=r[e.mediaType];if(t&&0!==t.state){var n,i=u.getCurrentBufferLevel(e.mediaType);n=t.abrQuality>0?_(t,t.abrQuality):10;var a=Math.max(0,n-i);t.placeholderBuffer=Math.min(t.placeholderBuffer,a)}}}function C(){r={}}return t={getMaxIndex:function(e){var t=Object(i.a)(s).create();if(!(e&&e.hasOwnProperty("getMediaInfo")&&e.hasOwnProperty("getMediaType")&&e.hasOwnProperty("getScheduleController")&&e.hasOwnProperty("getStreamInfo")&&e.hasOwnProperty("getAbrController")&&e.hasOwnProperty("useBufferOccupancyABR")))return t;var a=e.getMediaInfo(),o=e.getMediaType(),l=e.getScheduleController(),c=e.getStreamInfo(),f=e.getAbrController(),d=f.getThroughputHistory(),h=c?c.id:null,g=c&&c.manifestInfo&&c.manifestInfo.isDynamic,p=e.useBufferOccupancyABR();if(t.reason=t.reason||{},!p)return t;l.setTimeToLoadDelay(0);var T=function(e){var t=e.getMediaType(),n=r[t];return n?0!==n.state&&E(n,t):(n=m(e),r[t]=n),n}(e);if(0===T.state)return t;var b,S=u.getCurrentBufferLevel(o),A=d.getAverageThroughput(o,g),I=d.getSafeAverageThroughput(o,g),R=d.getAverageLatency(o);if(t.reason.state=T.state,t.reason.throughput=A,t.reason.latency=R,isNaN(A))return t;switch(T.state){case 1:b=f.getQualityForBitrate(a,I,h,R),t.quality=b,t.reason.throughput=I,T.placeholderBuffer=Math.max(0,_(T,b)-S),T.lastQuality=b,!isNaN(T.lastSegmentDurationS)&&S>=T.lastSegmentDurationS&&(T.state=2);break;case 2:!function(e,t){var n=Date.now();if(isNaN(e.lastSegmentFinishTimeMs)){if(!isNaN(e.lastCallTimeMs)){var r=.001*(n-e.lastCallTimeMs);e.placeholderBuffer+=Math.max(0,r)}}else{var i=.001*(n-e.lastSegmentFinishTimeMs);e.placeholderBuffer+=Math.max(0,i)}e.lastCallTimeMs=n,e.lastSegmentStart=NaN,e.lastSegmentRequestTimeMs=NaN,e.lastSegmentFinishTimeMs=NaN,E(e,t)}(T,o),b=function(e,t){for(var n=e.bitrates.length,r=NaN,i=NaN,a=0;a=i)&&(i=o,r=a)}return r}(T,S+T.placeholderBuffer);var w=f.getQualityForBitrate(a,I,h,R);b>T.lastQuality&&b>w&&(b=Math.max(w,T.lastQuality));var N=Math.max(0,S+T.placeholderBuffer-v(T,b));N<=T.placeholderBuffer?(T.placeholderBuffer-=N,N=0):(N-=T.placeholderBuffer,T.placeholderBuffer=0,bt.mostAdvancedSegmentStart?(t.mostAdvancedSegmentStart=a,t.lastSegmentWasReplacement=!1):t.lastSegmentWasReplacement=!0,t.lastSegmentStart=a,t.lastSegmentDurationS=e.chunk.duration,t.lastQuality=e.chunk.quality,v(t,i)}}}function E(e){if(e&&e.metric===o.a.HTTP_REQUEST&&e.value&&e.value.type===T.a.MEDIA_SEGMENT_TYPE&&e.value.trace&&e.value.trace.length){var t=n[e.mediaType],i=r[e.mediaType];t&&0!==t.state&&(t.lastSegmentRequestTimeMs=e.value.trequest.getTime(),t.lastSegmentFinishTimeMs=e.value._tfinish.getTime(),v(t,i))}}function v(e,t){isNaN(e.lastSegmentStart)||isNaN(e.lastSegmentRequestTimeMs)||(t.segment_request_start_s=.001*e.lastSegmentRequestTimeMs,t.segment_download_finish_s=.001*e.lastSegmentFinishTimeMs,e.lastSegmentStart=NaN,e.lastSegmentRequestTimeMs=NaN)}function _(e){if(e&&e.mediaType){var t=n[e.mediaType];t&&0!==t.state&&(t.abrQuality=e.newQuality)}}function b(e,t){if(e.length!==t.length)return-1;for(var n=0,r=0;r=O.B_target){D.state=2,O.Q=l;for(var M=0;MF&&(U=-1),O.w[B]=O.prev_w[B]+U*(k/(2*c))*((O.Q+l)*(C*m[B]/F));O.w=function(e){for(var t=e.length,n=!1,r=[],i=0;i=a[l+1]){n=!0;break}n||(s=(o+a[t-1]-1)/t);for(var c=0;cD.lastQuality&&m[D.lastQuality+1]<=F&&(t=D.lastQuality+1),m[t]>=F&&(O.Q=2*Math.max(l,O.Q)),o.quality=t,o.reason.throughput=w,o.reason.latency=N,o.reason.bufferLevel=I,D.lastQuality=o.quality;break;default:s.debug("L2A ABR rule invoked in bad state."),o.quality=_.getQualityForBitrate(f,R,v.id,N),o.reason.state=D.state,o.reason.throughput=R,o.reason.latency=N,D.state=1,p(D)}return o},reset:function(){S(),h.off(c.a.PLAYBACK_SEEKING,m,t),h.off(c.a.MEDIA_FRAGMENT_LOADED,y,t),h.off(c.a.METRIC_ADDED,E,t),h.off(c.a.QUALITY_CHANGE_REQUESTED,_,t)}},s=Object(f.a)(u).getInstance().getLogger(t),S(),h.on(c.a.PLAYBACK_SEEKING,m,t),h.on(c.a.MEDIA_FRAGMENT_LOADED,y,t),h.on(c.a.METRIC_ADDED,E,t),h.on(c.a.QUALITY_CHANGE_REQUESTED,_,t),t}A.__dashjs_factory_name="L2ARule";var I=r.a.getClassFactory(A),R="manual_weight_selection",w="random_weight_selection",N="dynamic_weight_selection";function C(){var e,t,n,r,i,a,o,s,u,l=this.context;function c(){n=null,r=1,i=100,a=0,o=null,s=null,u=N}function d(){var 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Latency too high, doing a seek to live point"),t=!0,c.seekToCurrentLive(!0,!1);else{var d=c.getCurrentLiveLatency(),m=c.getLiveDelay();if(I()===a.a.LIVE_CATCHUP_MODE_LOLP){var y=i.get().streaming.liveCatchup.playbackBufferMin;e=function(e,t,n,r,i){var a;if(i0&&(u=1);return u}(s,d,m,u);var E=n?.25:.02/(.5/s.max);e&&Math.abs(o-e)>=E&&(p.debug("[CatchupController]: Setting playback rate to ".concat(e)),r.setPlaybackRate(e))}}}()}function A(){return c.getCurrentLiveLatency()-c.getLiveDelay()}function I(){var e=i.get().streaming.liveCatchup.playbackBufferMin;return i.get().streaming.liveCatchup.mode!==a.a.LIVE_CATCHUP_MODE_LOLP||null===e||isNaN(e)?a.a.LIVE_CATCHUP_MODE_DEFAULT:a.a.LIVE_CATCHUP_MODE_LOLP}function R(){h.getCatchupPlaybackRates(!0)}return e={reset:function(){y.off(d.a.BUFFER_LEVEL_UPDATED,_,e),y.off(d.a.BUFFER_LEVEL_STATE_CHANGED,T,e),y.off(d.a.PLAYBACK_PROGRESS,S,e),y.off(d.a.PLAYBACK_TIME_UPDATED,S,e),y.off(d.a.PLAYBACK_SEEKED,S,e),y.off(l.a.SETTING_UPDATED_CATCHUP_ENABLED,b,e),y.off(l.a.SETTING_UPDATED_PLAYBACK_RATE_MIN,R,e),y.off(l.a.SETTING_UPDATED_PLAYBACK_RATE_MAX,R,e),y.off(d.a.STREAM_INITIALIZED,R,e),E(),r.setPlaybackRate(1,!0)},setConfig:function(e){e&&(e.settings&&(i=e.settings),e.videoModel&&(r=e.videoModel),e.streamController&&(o=e.streamController),e.playbackController&&(c=e.playbackController),e.mediaPlayerModel&&(h=e.mediaPlayerModel))},initialize:function(){y.on(d.a.BUFFER_LEVEL_UPDATED,_,e),y.on(d.a.BUFFER_LEVEL_STATE_CHANGED,T,e),y.on(d.a.PLAYBACK_PROGRESS,S,e),y.on(d.a.PLAYBACK_TIME_UPDATED,S,e),y.on(d.a.PLAYBACK_SEEKED,v,e),y.on(l.a.SETTING_UPDATED_CATCHUP_ENABLED,b,e),y.on(l.a.SETTING_UPDATED_PLAYBACK_RATE_MIN,R,e),y.on(l.a.SETTING_UPDATED_PLAYBACK_RATE_MAX,R,e),y.on(d.a.STREAM_INITIALIZED,R,e),R()}},p=Object(f.a)(m).getInstance().getLogger(e),E(),e}Te.__dashjs_factory_name="CatchupController";var be=c.a.getSingletonFactory(Te),Se=[a.a.SERVICE_DESCRIPTION_DVB_LL_SCHEME],Ae="video",Ie="audio",Re="any",we="all";function Ne(){var e,t,n,r,i,s=this.context;function u(){t={liveDelay:NaN,liveCatchup:{maxDrift:NaN,playbackRate:{min:NaN,max:NaN}},minBitrate:{},maxBitrate:{},initialBitrate:{}},n=[]}function l(e,n,i){try{t[e][n]=i/1e3}catch(e){r.error(e)}}return e={getServiceDescriptionSettings:function(){return t},getProducerReferenceTimeOffsets:function(){return n},calculateProducerReferenceTimeOffsets:function(e){try{var t=[];if(e&&e.length>0){var s=[a.a.VIDEO,a.a.AUDIO,a.a.TEXT],u=i.getAvailabilityStartTime()/1e3;e.forEach((function(e){var n=s.reduce((function(t,n){return t=t.concat(i.getAllMediaInfoForType(e,n))}),[]).reduce((function(t,n){return i.getProducerReferenceTimes(e,n).forEach((function(r){var a=i.getVoRepresentations(n);if(a&&a.length>0&&a[0].adaptation&&a[0].segmentInfoType===o.a.SEGMENT_TEMPLATE){var s=a[0],l=new Date(r[o.a.WALL_CLOCK_TIME]).getTime()/1e3-(r[o.a.PRESENTATION_TIME]/s[o.a.TIMESCALE]-s[o.a.PRESENTATION_TIME_OFFSET]+e.start),c=u-l;t.push({id:r[o.a.ID],to:c})}})),t}),[]);t=t.concat(n)}))}n=t}catch(e){r.error(e),n=[]}},applyServiceDescription:function(e){if(e&&e.serviceDescriptions){var i=e.serviceDescriptions.filter((function(e){return Se.includes(e.schemeIdUri)})),o=e.serviceDescriptions.filter((function(e){return null==e.schemeIdUri})),s=i.length>0?i[i.length-1]:o[o.length-1];s&&(s.latency&&s.latency.target>0&&function(e){var i;i=e.schemeIdUri===a.a.SERVICE_DESCRIPTION_DVB_LL_SCHEME?function(e){var t=e.latency.target/1e3,n=!isNaN(e.latency.max)&&e.latency.max>e.latency.target?(e.latency.max-e.latency.target+500)/1e3:NaN,r=e.latency.referenceId||NaN;return{liveDelay:t,maxDrift:n,referenceId:r}}(e):function(e){var t=e.latency.target/1e3,n=!isNaN(e.latency.max)&&e.latency.max>e.latency.target?(e.latency.max-e.latency.target+500)/1e3:NaN,r=e.latency.referenceId||NaN;return{liveDelay:t,maxDrift:n,referenceId:r}}(e);if(n.length>0){var o=function(e){var t,r=0,i=n.filter((function(t){return t.id===e.referenceId}));0===i.length?(r=n.length>0?n[0].to:0,t=n[0].id||NaN):(r=i[0].to||0,t=i[0].id||NaN);return{to:r,id:t}}(i),s=o.to,u=o.id;t.liveDelay=i.liveDelay-s,t.liveCatchup.maxDrift=i.maxDrift,r.debug("\n                Found latency properties coming from service description. Applied time offset of ".concat(s," from ProducerReferenceTime element with id ").concat(u,".\n                Live Delay: ").concat(i.liveDelay-s,", Live catchup max drift: ").concat(i.maxDrift,"\n            "))}else t.liveDelay=i.liveDelay,t.liveCatchup.maxDrift=i.maxDrift,r.debug("Found latency properties coming from service description: Live Delay: ".concat(i.liveDelay,", Live catchup max drift: ").concat(i.maxDrift))}(s),s.playbackRate&&function(e){var n=e.playbackRate.min?Math.round(1e3*(e.playbackRate.min-1))/1e3:NaN,i=e.playbackRate.max?Math.round(1e3*(e.playbackRate.max-1))/1e3:NaN;t.liveCatchup.playbackRate.min=n,t.liveCatchup.playbackRate.max=i,r.debug("Found latency properties coming from service description: Live catchup min playback rate: ".concat(n)),r.debug("Found latency properties coming from service description: Live catchup max playback rate: 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TypeError("Cannot call a class as a function")}(this,e),this.url=t||null,this.type=v.a.CONTENT_STEERING_TYPE,this.responseType="json"};var Me=function e(){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this.version=null,this.ttl=300,this.reloadUri=null,this.serviceLocationPriority=[]},Pe="_DASH_throughput",Le="_DASH_pathway",xe="url";function Fe(){var e,t,n,r,i,s,u,c,h,g,p,m,E,v,_,T=this.context,b=Object(L.a)(T).getInstance();function S(e){e&&e.toStreamInfo&&(r=e.toStreamInfo)}function A(e){e&&e.request&&e.request.serviceLocation&&(i=e.request.serviceLocation)}function I(){var e=p.getValue();return _.getContentSteering(e)}function R(){return new Promise((function(e){try{var s=I();if(!s||!s.serverUrl)return void e();var l=function(e){var t=e.proxyServerUrl?e.proxyServerUrl:e.serverUrl;n&&n.reloadUri&&(t=b.isRelative(n.reloadUri)?b.resolve(n.reloadUri,e.serverUrl):n.reloadUri);var o=[];if(r){var s=_.getIsDynamic(),u=_.getAllMediaInfoForType(r,a.a.VIDEO).length>0?a.a.VIDEO:a.a.AUDIO,l=E.getThroughputHistory(),c=l?l.getAverageThroughput(u,s):NaN;isNaN(c)||o.push({key:Pe,value:1e3*c})}i&&o.push({key:Le,value:i});e.proxyServerUrl&&e.proxyServerUrl===t&&e.serverUrl&&o.push({key:xe,value:encodeURI(e.serverUrl)});return t=_e.a.addAditionalQueryParameterToUrl(t,o)}(s),c=new Oe(l);u.load({request:c,success:function(t){!function(e){if(!e||!e[o.a.CONTENT_STEERING_RESPONSE.VERSION]||1!==parseInt(e[o.a.CONTENT_STEERING_RESPONSE.VERSION]))return;(n=new Me).version=e[o.a.CONTENT_STEERING_RESPONSE.VERSION],e[o.a.CONTENT_STEERING_RESPONSE.TTL]&&!isNaN(e[o.a.CONTENT_STEERING_RESPONSE.TTL])&&(n.ttl=e[o.a.CONTENT_STEERING_RESPONSE.TTL]);e[o.a.CONTENT_STEERING_RESPONSE.RELOAD_URI]&&(n.reloadUri=e[o.a.CONTENT_STEERING_RESPONSE.RELOAD_URI]);e[o.a.CONTENT_STEERING_RESPONSE.SERVICE_LOCATION_PRIORITY]&&(n.serviceLocationPriority=e[o.a.CONTENT_STEERING_RESPONSE.SERVICE_LOCATION_PRIORITY]);w()}(t),v.trigger(d.a.CONTENT_STEERING_REQUEST_COMPLETED,{currentSteeringResponseData:n,url:l}),e()},error:function(n){!function(e){t.warn("Error fetching data from content steering server",e),w()}(n),e(n)}})}catch(t){e(t)}}))}function w(){n&&n.ttl&&!isNaN(n.ttl)&&(s&&clearTimeout(s),s=setTimeout((function(){R()}),1e3*n.ttl))}function N(){s&&clearTimeout(s),s=null}function C(){n=null,r=null,i=null,N()}return e={reset:function(){C(),v.off(d.a.PERIOD_SWITCH_COMPLETED,S,e),v.off(l.a.FRAGMENT_LOADING_STARTED,A,e)},setConfig:function(e){e&&(e.adapter&&(_=e.adapter),e.errHandler&&(c=e.errHandler),e.dashMetrics&&(h=e.dashMetrics),e.mediaPlayerModel&&(g=e.mediaPlayerModel),e.requestModifier&&(m=e.requestModifier),e.manifestModel&&(p=e.manifestModel),e.abrController&&(E=e.abrController),e.eventBus&&(v=e.eventBus))},loadSteeringData:R,getCurrentSteeringResponseData:function(){return n},shouldQueryBeforeStart:function(){var e=I();return e&&e.queryBeforeStart},getSteeringDataFromManifest:I,stopSteeringRequestTimer:N,initialize:function(){u=Object(De.a)(T).create({errHandler:c,dashMetrics:h,mediaPlayerModel:g,requestModifier:m,errors:y.a}),v.on(d.a.PERIOD_SWITCH_COMPLETED,S,e),v.on(l.a.FRAGMENT_LOADING_STARTED,A,e)}},t=Object(f.a)(T).getInstance().getLogger(e),C(),e}Fe.__dashjs_factory_name="ContentSteeringController";var ke=c.a.getSingletonFactory(Fe),Ue=n(30),Be=n.n(Ue),Ge=n(50);function je(){var e,t,n,r,i,o,s,c,d=this.context,h=Object(u.a)(d).getInstance();function g(e,t){return e&&n[t]&&n[t][e]?n[t][e].list:[]}function p(e,t){return e&&n[t]&&n[t][e]?n[t][e].current:null}function m(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];if(e&&e.streamInfo){var i=e.type,s=e.streamInfo,u=s.id,f=p(i,u);if(n[u]&&n[u][i]&&(n[u][i].current=e,n[u][i].current&&(i!==a.a.TEXT&&!v(e,f)||i===a.a.TEXT&&e.isFragmented)&&h.trigger(l.a.CURRENT_TRACK_CHANGED,{oldMediaInfo:f,newMediaInfo:e,switchMode:r.get().streaming.trackSwitchMode[i]},{streamId:u}),!t)){var d=T(e);if(!d||!n[u][i].storeLastSettings)return;d.roles&&(d.role=d.roles[0],delete d.roles),d.accessibility&&(d.accessibility=d.accessibility[0]),d.audioChannelConfiguration&&(d.audioChannelConfiguration=d.audioChannelConfiguration[0]),o[i]=d,c.setSavedMediaSettings(i,d)}}}function y(e,t){e&&t&&(i[e]=t)}function E(e){return e?i[e]:null}function v(e,t){if(!e&&!t)return!0;if(!e||!t)return!1;var n=e.id===t.id,r=e.viewpoint===t.viewpoint,i=e.lang===t.lang,a=e.codec===t.codec,o=e.roles.toString()===t.roles.toString(),s=e.accessibility.toString()===t.accessibility.toString(),u=e.audioChannelConfiguration.toString()===t.audioChannelConfiguration.toString();return n&&a&&r&&i&&o&&s&&u}function _(){n={},o={},i={audio:null,video:null,text:null}}function T(e){var t={lang:e.lang,viewpoint:e.viewpoint,roles:e.roles,accessibility:e.accessibility,audioChannelConfiguration:e.audioChannelConfiguration};return t.lang||t.viewpoint||t.role&&t.role.length>0||t.accessibility&&t.accessibility.length>0||t.audioChannelConfiguration&&t.audioChannelConfiguration.length>0?t:null}function b(e,t,n){var r=[];return e.forEach((function(e){t(n,e)&&r.push(e)})),0!==r.length?r:e}function S(e,t){return!e.lang||e.lang instanceof RegExp?t.lang.match(e.lang):""!==t.lang&&Object(Ge.extendedFilter)(t.lang,Be()(e.lang)).length>0}function A(e,t){return void 0===e.index||null===e.index||t.index===e.index}function I(e,t){return!e.viewpoint||e.viewpoint===t.viewpoint}function R(e,t){var n=arguments.length>2&&void 0!==arguments[2]&&arguments[2],r=!e.role||!!t.roles.filter((function(t){return t===e.role}))[0];return r||t.type===a.a.AUDIO&&n}function w(e,t){return e.accessibility?!!t.accessibility.filter((function(t){return t===e.accessibility}))[0]:!t.accessibility.length}function N(e,t){return!e.audioChannelConfiguration||!!t.audioChannelConfiguration.filter((function(t){return t===e.audioChannelConfiguration}))[0]}function C(e){var t,n=0,r=[];return e.forEach((function(e){(t=Math.max.apply(Math,e.bitrateList.map((function(e){return e.bandwidth}))))>n?(n=t,r=[e]):t===n&&r.push(e)})),r}function D(e){var t,n=1/0,r=[];return e.forEach((function(e){var i=e.bitrateList.reduce((function(e,t){var n=Math.max(1,t.width*t.height);return e+t.bandwidth/n}),0);(t=i/e.bitrateList.length)n?(n=t,r=[e]):t===n&&r.push(e)})),r}function M(e,n){if(e===a.a.TEXT)return n[0];var i,o=r.get().streaming.selectionModeForInitialTrack,u=s.getCustomInitialTrackSelectionFunction();if(u&&"function"==typeof u)i=u(n);else switch(o){case a.a.TRACK_SELECTION_MODE_HIGHEST_SELECTION_PRIORITY:i=function(e){var t=(n=e,r=0,i=[],n.forEach((function(e){isNaN(e.selectionPriority)||(e.selectionPriority>r?(r=e.selectionPriority,i=[e]):e.selectionPriority===r&&i.push(e))})),i);var n,r,i;t.length>1&&(t=C(t));t.length>1&&(t=O(t));return t}(n);break;case a.a.TRACK_SELECTION_MODE_HIGHEST_BITRATE:i=function(e){var t=C(e);t.length>1&&(t=O(t));return t}(n);break;case a.a.TRACK_SELECTION_MODE_FIRST_TRACK:i=P(n);break;case a.a.TRACK_SELECTION_MODE_HIGHEST_EFFICIENCY:i=function(e){var t=D(e);t.length>1&&(t=C(t));return t}(n);break;case a.a.TRACK_SELECTION_MODE_WIDEST_RANGE:i=function(e){var t=O(e);t.length>1&&(t=C(e));return t}(n);break;default:t.warn("Track selection mode ".concat(o," is not supported. 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i=Be()(e.lang);i&&(r=Object(Ge.extendedFilter)(t.lang,i).length>0)}}else r=!0;var o=void 0===e.index||null===e.index||t.index===e.index,s=!e.viewpoint||e.viewpoint===t.viewpoint,u=!e.role||!!t.roles.filter((function(t){return t===e.role}))[0],l=!e.accessibility||!!t.accessibility.filter((function(t){return t===e.accessibility}))[0],c=!e.audioChannelConfiguration||!!t.audioChannelConfiguration.filter((function(t){return t===e.audioChannelConfiguration}))[0];return r&&o&&s&&(u||t.type===a.a.AUDIO&&n)&&l&&c}catch(e){return!1}},matchSettingsLang:S,matchSettingsIndex:A,matchSettingsViewPoint:I,matchSettingsRole:R,matchSettingsAccessibility:w,matchSettingsAudioChannelConfig:N,saveTextSettingsDisabled:function(){c.setSavedMediaSettings(a.a.TEXT,null)},setConfig:function(e){e&&(e.domStorage&&(c=e.domStorage),e.settings&&(r=e.settings),e.customParametersModel&&(s=e.customParametersModel))},reset:_},t=Object(f.a)(d).getInstance().getLogger(e),_(),e}je.__dashjs_factory_name="MediaController";var Ye=c.a.getSingletonFactory(je);c.a.updateSingletonFactory(je.__dashjs_factory_name,Ye);var qe=Ye,He=n(46);var Ve=function e(t,n){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this.data={baseUrls:t||null,selectedIdx:n||NaN},this.children=[]};function Ke(){var e,t,n,r=this.context,i=Object(He.a)(r).getInstance();function a(e,t,r){var a=n.getBaseURLsFromElement(r);e[t]?i.areEqual(a,e[t].data.baseUrls)||(e[t].data.baseUrls=a,e[t].data.selectedIdx=NaN):e[t]=new Ve(a)}function o(e){!function(){if(!n||!n.hasOwnProperty("getBaseURLsFromElement")||!n.hasOwnProperty("getRepresentationSortFunction"))throw new Error("setConfig function has to be called previously")}();var r=n.getBaseURLsFromElement(e);i.areEqual(r,t.data.baseUrls)||(t.data.baseUrls=r,t.data.selectedIdx=NaN),e&&e.Period_asArray&&e.Period_asArray.forEach((function(e,r){a(t.children,r,e),e.AdaptationSet_asArray&&e.AdaptationSet_asArray.forEach((function(e,i){a(t.children[r].children,i,e),e.Representation_asArray&&e.Representation_asArray.sort(n.getRepresentationSortFunction()).forEach((function(e,n){a(t.children[r].children[i].children,n,e)}))}))}))}function s(){t=new Ve}return e={reset:s,update:function(e){o(e)},getForPath:function(e){var n=t,r=[n.data];return e&&e.forEach((function(e){(n=n.children[e])&&r.push(n.data)})),r.filter((function(e){return e.baseUrls.length}))},invalidateSelectedIndexes:function(e){!function e(n,r){var i=r||t;n(i.data),i.children&&i.children.forEach((function(t){return 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d(e,r){if(!r||!r.Period_asArray||0===r.Period_asArray.length)return Promise.resolve();var i=[];return r.Period_asArray.forEach((function(r){i.push(function(e,r){return new Promise((function(i){if(e&&e.AdaptationSet_asArray&&0!==e.AdaptationSet_asArray.length){var s=[];e.AdaptationSet_asArray.forEach((function(e){t.getIsTypeOf(e,r)&&s.push(function(e,r){return new Promise((function(i){if(e.Representation_asArray&&0!==e.Representation_asArray.length){var s=[],u=[];e.Representation_asArray.forEach((function(i,o){var l=t.getCodec(e,o,!1),c=function(e,t,n){switch(e){case a.a.VIDEO:return function(e,t){var n=e.width||null,r=e.height||null,i=e.frameRate||null,a=e.bandwidth||null;return{codec:t,width:n,height:r,framerate:i,bitrate:a}}(t,n);case a.a.AUDIO:return function(e,t){var n=e.audioSamplingRate||null,r=e.bandwidth||null;return{codec:t,bitrate:r,samplerate:n}}(t,n);default:return null}}(r,i,l);u.push(c),s.push(n.supportsCodec(c,r))})),Promise.all(s).then((function(t){e.Representation_asArray=e.Representation_asArray.filter((function(e,n){return t[n]||o.debug("[Stream] Codec ".concat(u[n].codec," not supported ")),t[n]})),i()})).catch((function(){i()}))}else i()}))}(e,r))})),Promise.all(s).then((function(){e.AdaptationSet_asArray=e.AdaptationSet_asArray.filter((function(e){var t=e.Representation_asArray&&e.Representation_asArray.length>0;return t||(c.trigger(l.a.ADAPTATION_SET_REMOVED_NO_CAPABILITIES,{adaptationSet:e}),o.warn("AdaptationSet has been removed because of no supported Representation")),t})),i()})).catch((function(){i()}))}else i()}))}(r,e))})),Promise.all(i)}return e={setConfig:function(e){e&&(e.adapter&&(t=e.adapter),e.capabilities&&(n=e.capabilities),e.settings&&(r=e.settings),e.customParametersModel&&(i=e.customParametersModel))},filterUnsupportedFeatures:function(e){return new Promise((function(s){var u=[];u.push(d(a.a.VIDEO,e)),u.push(d(a.a.AUDIO,e)),Promise.all(u).then((function(){r.get().streaming.capabilities.filterUnsupportedEssentialProperties&&function(e){if(!e||!e.Period_asArray||0===e.Period_asArray.length)return;e.Period_asArray.forEach((function(e){e.AdaptationSet_asArray=e.AdaptationSet_asArray.filter((function(e){return!e.Representation_asArray||0===e.Representation_asArray.length||(e.Representation_asArray=e.Representation_asArray.filter((function(e){var r=t.getEssentialPropertiesForRepresentation(e);if(r&&r.length>0)for(var i=0;i0)}))}))}(e),function(e){var t=i.getCustomCapabilitiesFilters();if(!t||0===t.length||!e||!e.Period_asArray||0===e.Period_asArray.length)return;e.Period_asArray.forEach((function(e){e.AdaptationSet_asArray=e.AdaptationSet_asArray.filter((function(e){return!e.Representation_asArray||0===e.Representation_asArray.length||(e.Representation_asArray=e.Representation_asArray.filter((function(e){return!t.some((function(t){return!t(e)}))})),e.Representation_asArray&&e.Representation_asArray.length>0)}))}))}(e),s()})).catch((function(){s()}))}))}},o=Object(f.a)(s).getInstance().getLogger(e),e}St.__dashjs_factory_name="CapabilitiesFilter";var At=c.a.getSingletonFactory(St);var It=function e(){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this.t=null,this.xywh=null,this.track=null,this.id=null,this.s=null,this.r=null};function Rt(){var e;return{initialize:function(t){if(e=new It,!t)return null;var n=t.indexOf("#");if(-1!==n)for(var 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e=a.get().streaming.buffer.initialBufferLevel;return isNaN(e)||e<0?0:Math.min(u(),e)},getRetryAttemptsForType:function(e){var t=isNaN(a.get().streaming.retryAttempts.lowLatencyMultiplyFactor)?5:a.get().streaming.retryAttempts.lowLatencyMultiplyFactor;return n.getLowLatencyModeEnabled()?a.get().streaming.retryAttempts[e]*t:a.get().streaming.retryAttempts[e]},getRetryIntervalsForType:function(e){var t=isNaN(a.get().streaming.retryIntervals.lowLatencyReductionFactor)?10:a.get().streaming.retryIntervals.lowLatencyReductionFactor;return n.getLowLatencyModeEnabled()?a.get().streaming.retryIntervals[e]/t:a.get().streaming.retryIntervals[e]},getCatchupPlaybackRates:function(e){var t=a.get().streaming.liveCatchup.playbackRate;if(!isNaN(t.min)||!isNaN(t.max))return{min:o(t.min,e),max:s(t.max,e)};var n=r.getServiceDescriptionSettings();if(n&&n.liveCatchup&&(!isNaN(n.liveCatchup.playbackRate.min)||!isNaN(n.liveCatchup.playbackRate.max))){var 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s=t.shift();e[s.idx].drops-=s.drop,e[s.idx].dropSize-=s.dropSize,e[s.idx].noDrops-=s.noDrop}},getSwitchRequests:function(){return e},reset:function(){e=[],t=[]}}}Ft.__dashjs_factory_name="SwitchRequestHistory";var kt=c.a.getClassFactory(Ft);function Ut(){var e={},t={},n={};return{push:function(r,i,a){if(i){e[r]||(e[r]=[],t[r]=0,n[r]=0);var o=a&&a.droppedVideoFrames?a.droppedVideoFrames:0,s=a&&a.totalVideoFrames?a.totalVideoFrames:0,u=o-t[r];t[r]=o;var l=s-n[r];n[r]=s;var c=e[r];isNaN(i)||(c[i]?(c[i].droppedVideoFrames+=u,c[i].totalVideoFrames+=l):c[i]={droppedVideoFrames:u,totalVideoFrames:l})}},getFrameHistory:function(t){return e[t]},clearForStream:function(r){try{delete e[r],delete t[r],delete n[r]}catch(e){}},reset:function(){e={},t={},n={}}}}Ut.__dashjs_factory_name="DroppedFramesHistory";var Bt=c.a.getClassFactory(Ut);function Gt(e){var t,n,r,i,o,s=(e=e||{}).settings;function u(e,t,n,r){var i=Math.pow(.5,n/r.fast);e.fastEstimate=(1-i)*t+i*e.fastEstimate;var 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he=dashjs.FactoryMaker.getClassFactory(de),ge=[{generateKeyRequest:"generateKeyRequest",addKey:"addKey",cancelKeyRequest:"cancelKeyRequest",needkey:"needkey",keyerror:"keyerror",keyadded:"keyadded",keymessage:"keymessage"},{generateKeyRequest:"webkitGenerateKeyRequest",addKey:"webkitAddKey",cancelKeyRequest:"webkitCancelKeyRequest",needkey:"webkitneedkey",keyerror:"webkitkeyerror",keyadded:"webkitkeyadded",keymessage:"webkitkeymessage"}],pe=[{setMediaKeys:"setMediaKeys",MediaKeys:"MediaKeys",release:"close",needkey:"needkey",error:"keyerror",message:"keymessage",ready:"keyadded",close:"keyclose"},{setMediaKeys:"msSetMediaKeys",MediaKeys:"MSMediaKeys",release:"close",needkey:"msneedkey",error:"mskeyerror",message:"mskeymessage",ready:"mskeyadded",close:"mskeyclose"}];function me(){var e,t=this.context;function n(e,t){for(var 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