BIG core logic rewrite

cmd/debug/debug.go

@@ -3,7 +3,7 @@ package debug
 import (
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
 func Init() {
@@ -12,6 +12,6 @@ func Init() {
 	streams.HandleFunc("null", nullHandler)
 }
 
-func nullHandler(string) (streamer.Producer, error) {
+func nullHandler(string) (core.Producer, error) {
 	return nil, nil
 }

cmd/dvrip/dvrip.go

@@ -2,15 +2,15 @@ package dvrip
 
 import (
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/dvrip"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 )
 
 func Init() {
 	streams.HandleFunc("dvrip", handle)
 }
 
-func handle(url string) (streamer.Producer, error) {
+func handle(url string) (core.Producer, error) {
 	conn := dvrip.NewClient(url)
 	if err := conn.Dial(); err != nil {
 		return nil, err

cmd/echo/echo.go

@@ -4,15 +4,15 @@ import (
 	"bytes"
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/shell"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"os/exec"
 )
 
 func Init() {
 	log := app.GetLogger("echo")
 
-	streams.HandleFunc("echo", func(url string) (streamer.Producer, error) {
+	streams.HandleFunc("echo", func(url string) (core.Producer, error) {
 		args := shell.QuoteSplit(url[5:])
 
 		b, err := exec.Command(args[0], args[1:]...).Output()

cmd/exec/exec.go

@@ -8,9 +8,9 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/rtsp"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	pkg "github.com/AlexxIT/go2rtc/pkg/rtsp"
 	"github.com/AlexxIT/go2rtc/pkg/shell"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/rs/zerolog"
 	"os"
 	"os/exec"
@@ -48,7 +48,7 @@ func Init() {
 	log = app.GetLogger("exec")
 }
 
-func Handle(url string) (streamer.Producer, error) {
+func Handle(url string) (core.Producer, error) {
 	sum := md5.Sum([]byte(url))
 	path := "/" + hex.EncodeToString(sum[:])
 
@@ -67,7 +67,7 @@ func Handle(url string) (streamer.Producer, error) {
 		cmd.Stderr = os.Stderr
 	}
 
-	ch := make(chan streamer.Producer)
+	ch := make(chan core.Producer)
 
 	waitersMu.Lock()
 	waiters[path] = ch
@@ -116,5 +116,5 @@ func Handle(url string) (streamer.Producer, error) {
 // internal
 
 var log zerolog.Logger
-var waiters = map[string]chan streamer.Producer{}
+var waiters = map[string]chan core.Producer{}
 var waitersMu sync.Mutex

cmd/ffmpeg/device/device_darwin.go

@@ -2,7 +2,7 @@ package device
 
 import (
 	"bytes"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"os/exec"
 	"strings"
 )
@@ -11,15 +11,15 @@ import (
 const deviceInputPrefix = "-f avfoundation"
 
 func deviceInputSuffix(videoIdx, audioIdx int) string {
-	video := findMedia(streamer.KindVideo, videoIdx)
-	audio := findMedia(streamer.KindAudio, audioIdx)
+	video := findMedia(core.KindVideo, videoIdx)
+	audio := findMedia(core.KindAudio, audioIdx)
 	switch {
 	case video != nil && audio != nil:
-		return `"` + video.MID + `:` + audio.MID + `"`
+		return `"` + video.ID + `:` + audio.ID + `"`
 	case video != nil:
-		return `"` + video.MID + `"`
+		return `"` + video.ID + `"`
 	case audio != nil:
-		return `"` + audio.MID + `"`
+		return `"` + audio.ID + `"`
 	}
 	return ""
 }
@@ -40,10 +40,10 @@ process:
 	for _, line := range lines {
 		switch {
 		case strings.HasSuffix(line, "video devices:"):
-			kind = streamer.KindVideo
+			kind = core.KindVideo
 			continue
 		case strings.HasSuffix(line, "audio devices:"):
-			kind = streamer.KindAudio
+			kind = core.KindAudio
 			continue
 		case strings.HasPrefix(line, "dummy"):
 			break process
@@ -56,6 +56,6 @@ process:
 	}
 }
 
-func loadMedia(kind, name string) *streamer.Media {
-	return &streamer.Media{Kind: kind, MID: name}
+func loadMedia(kind, name string) *core.Media {
+	return &core.Media{Kind: kind, ID: name}
 }

cmd/ffmpeg/device/device_linux.go

@@ -2,7 +2,7 @@ package device
 
 import (
 	"bytes"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"io/ioutil"
 	"os/exec"
 	"strings"
@@ -12,8 +12,8 @@ import (
 const deviceInputPrefix = "-f v4l2"
 
 func deviceInputSuffix(videoIdx, audioIdx int) string {
-	video := findMedia(streamer.KindVideo, videoIdx)
-	return video.MID
+	video := findMedia(core.KindVideo, videoIdx)
+	return video.ID
 }
 
 func loadMedias() {
@@ -23,8 +23,8 @@ func loadMedias() {
 	}
 	for _, file := range files {
 		log.Trace().Msg("[ffmpeg] " + file.Name())
-		if strings.HasPrefix(file.Name(), streamer.KindVideo) {
-			media := loadMedia(streamer.KindVideo, "/dev/"+file.Name())
+		if strings.HasPrefix(file.Name(), core.KindVideo) {
+			media := loadMedia(core.KindVideo, "/dev/"+file.Name())
 			if media != nil {
 				medias = append(medias, media)
 			}
@@ -32,7 +32,7 @@ func loadMedias() {
 	}
 }
 
-func loadMedia(kind, name string) *streamer.Media {
+func loadMedia(kind, name string) *core.Media {
 	cmd := exec.Command(
 		Bin, "-hide_banner", "-f", "v4l2", "-list_formats", "all", "-i", name,
 	)
@@ -44,5 +44,5 @@ func loadMedia(kind, name string) *streamer.Media {
 		return nil
 	}
 
-	return &streamer.Media{Kind: kind, MID: name}
+	return &core.Media{Kind: kind, ID: name}
 }

cmd/ffmpeg/device/device_windows.go

@@ -2,7 +2,7 @@ package device
 
 import (
 	"bytes"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"os/exec"
 	"strings"
 )
@@ -11,15 +11,15 @@ import (
 const deviceInputPrefix = "-f dshow"
 
 func deviceInputSuffix(videoIdx, audioIdx int) string {
-	video := findMedia(streamer.KindVideo, videoIdx)
-	audio := findMedia(streamer.KindAudio, audioIdx)
+	video := findMedia(core.KindVideo, videoIdx)
+	audio := findMedia(core.KindAudio, audioIdx)
 	switch {
 	case video != nil && audio != nil:
-		return `video="` + video.MID + `":audio=` + audio.MID + `"`
+		return `video="` + video.ID + `":audio=` + audio.ID + `"`
 	case video != nil:
-		return `video="` + video.MID + `"`
+		return `video="` + video.ID + `"`
 	case audio != nil:
-		return `audio="` + audio.MID + `"`
+		return `audio="` + audio.ID + `"`
 	}
 	return ""
 }
@@ -37,9 +37,9 @@ func loadMedias() {
 	for _, line := range lines {
 		var kind string
 		if strings.HasSuffix(line, "(video)") {
-			kind = streamer.KindVideo
+			kind = core.KindVideo
 		} else if strings.HasSuffix(line, "(audio)") {
-			kind = streamer.KindAudio
+			kind = core.KindAudio
 		} else {
 			continue
 		}
@@ -52,6 +52,6 @@ func loadMedias() {
 	}
 }
 
-func loadMedia(kind, name string) *streamer.Media {
-	return &streamer.Media{Kind: kind, MID: name}
+func loadMedia(kind, name string) *core.Media {
+	return &core.Media{Kind: kind, ID: name}
 }

cmd/ffmpeg/device/devices.go

@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/app"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/rs/zerolog"
 	"net/http"
 	"net/url"
@@ -52,9 +52,9 @@ func GetInput(src string) (string, error) {
 
 var Bin string
 var log zerolog.Logger
-var medias []*streamer.Media
+var medias []*core.Media
 
-func findMedia(kind string, index int) *streamer.Media {
+func findMedia(kind string, index int) *core.Media {
 	for _, media := range medias {
 		if media.Kind != kind {
 			continue

cmd/ffmpeg/ffmpeg.go

@@ -8,7 +8,7 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/ffmpeg/device"
 	"github.com/AlexxIT/go2rtc/cmd/rtsp"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"net/url"
 	"strconv"
 	"strings"
@@ -27,7 +27,7 @@ func Init() {
 		defaults["global"] += " -v error"
 	}
 
-	streams.HandleFunc("ffmpeg", func(url string) (streamer.Producer, error) {
+	streams.HandleFunc("ffmpeg", func(url string) (core.Producer, error) {
 		args := parseArgs(url[7:]) // remove `ffmpeg:`
 		if args == nil {
 			return nil, errors.New("can't generate ffmpeg command")

cmd/hass/hass.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/rs/zerolog"
 	"os"
 	"path"
@@ -38,7 +38,7 @@ func Init() {
 
 	urls := map[string]string{}
 
-	streams.HandleFunc("hass", func(url string) (streamer.Producer, error) {
+	streams.HandleFunc("hass", func(url string) (core.Producer, error) {
 		if hurl := urls[url[5:]]; hurl != "" {
 			return streams.GetProducer(hurl)
 		}

cmd/hls/hls.go

@@ -4,9 +4,9 @@ import (
 	"fmt"
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mp4"
 	"github.com/AlexxIT/go2rtc/pkg/mpegts"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/rs/zerolog/log"
 	"net/http"
 	"strconv"
@@ -27,7 +27,7 @@ func Init() {
 }
 
 type Consumer interface {
-	streamer.Consumer
+	core.Consumer
 	Init() ([]byte, error)
 	MimeCodecs() string
 	Start()

cmd/homekit/homekit.go

@@ -5,8 +5,8 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/srtp"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/homekit"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/rs/zerolog"
 )
 
@@ -20,12 +20,12 @@ func Init() {
 
 var log zerolog.Logger
 
-func streamHandler(url string) (streamer.Producer, error) {
+func streamHandler(url string) (core.Producer, error) {
 	conn, err := homekit.NewClient(url, srtp.Server)
 	if err != nil {
 		return nil, err
 	}
-	if err = conn.Dial();err!=nil{
+	if err = conn.Dial(); err != nil {
 		return nil, err
 	}
 	return conn, nil

cmd/http/http.go

@@ -4,10 +4,10 @@ import (
 	"errors"
 	"fmt"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mjpeg"
 	"github.com/AlexxIT/go2rtc/pkg/mpegts"
 	"github.com/AlexxIT/go2rtc/pkg/rtmp"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"net/http"
 	"strings"
@@ -18,7 +18,7 @@ func Init() {
 	streams.HandleFunc("https", handle)
 }
 
-func handle(url string) (streamer.Producer, error) {
+func handle(url string) (core.Producer, error) {
 	// first we get the Content-Type to define supported producer
 	req, err := http.NewRequest("GET", url, nil)
 	if err != nil {

cmd/isapi/init.go

@@ -2,15 +2,15 @@ package isapi
 
 import (
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/isapi"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 )
 
 func Init() {
 	streams.HandleFunc("isapi", handle)
 }
 
-func handle(url string) (streamer.Producer, error) {
+func handle(url string) (core.Producer, error) {
 	conn, err := isapi.NewClient(url)
 	if err != nil {
 		return nil, err

cmd/ivideon/ivideon.go

@@ -2,13 +2,13 @@ package ivideon
 
 import (
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/ivideon"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"strings"
 )
 
 func Init() {
-	streams.HandleFunc("ivideon", func(url string) (streamer.Producer, error) {
+	streams.HandleFunc("ivideon", func(url string) (core.Producer, error) {
 		id := strings.Replace(url[8:], "/", ":", 1)
 		prod := ivideon.NewClient(id)
 		if err := prod.Dial(); err != nil {

cmd/mp4/mp4.go

@@ -4,8 +4,8 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mp4"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/rs/zerolog"
 	"net/http"
 	"strconv"
@@ -105,10 +105,10 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 	cons := &mp4.Consumer{
 		RemoteAddr: r.RemoteAddr,
 		UserAgent:  r.UserAgent(),
-		Medias:     streamer.ParseQuery(r.URL.Query()),
+		Medias:     core.ParseQuery(r.URL.Query()),
 	}
 
-	cons.Listen(func(msg interface{}) {
+	cons.Listen(func(msg any) {
 		if data, ok := msg.([]byte); ok {
 			if _, err := w.Write(data); err != nil && exit != nil {
 				exit <- err

cmd/mp4/ws.go

@@ -4,8 +4,8 @@ import (
 	"errors"
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mp4"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"strings"
 )
 
@@ -94,40 +94,40 @@ func handlerWSMP4(tr *api.Transport, msg *api.Message) error {
 	return nil
 }
 
-func parseMedias(codecs string, parseAudio bool) (medias []*streamer.Media) {
-	var videos []*streamer.Codec
-	var audios []*streamer.Codec
+func parseMedias(codecs string, parseAudio bool) (medias []*core.Media) {
+	var videos []*core.Codec
+	var audios []*core.Codec
 
 	for _, name := range strings.Split(codecs, ",") {
 		switch name {
 		case mp4.MimeH264:
-			codec := &streamer.Codec{Name: streamer.CodecH264}
+			codec := &core.Codec{Name: core.CodecH264}
 			videos = append(videos, codec)
 		case mp4.MimeH265:
-			codec := &streamer.Codec{Name: streamer.CodecH265}
+			codec := &core.Codec{Name: core.CodecH265}
 			videos = append(videos, codec)
 		case mp4.MimeAAC:
-			codec := &streamer.Codec{Name: streamer.CodecAAC}
+			codec := &core.Codec{Name: core.CodecAAC}
 			audios = append(audios, codec)
 		case mp4.MimeOpus:
-			codec := &streamer.Codec{Name: streamer.CodecOpus}
+			codec := &core.Codec{Name: core.CodecOpus}
 			audios = append(audios, codec)
 		}
 	}
 
 	if videos != nil {
-		media := &streamer.Media{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
+		media := &core.Media{
+			Kind:      core.KindVideo,
+			Direction: core.DirectionSendonly,
 			Codecs:    videos,
 		}
 		medias = append(medias, media)
 	}
 
 	if audios != nil && parseAudio {
-		media := &streamer.Media{
-			Kind:      streamer.KindAudio,
-			Direction: streamer.DirectionRecvonly,
+		media := &core.Media{
+			Kind:      core.KindAudio,
+			Direction: core.DirectionSendonly,
 			Codecs:    audios,
 		}
 		medias = append(medias, media)

cmd/rtmp/rtmp.go

@@ -3,8 +3,8 @@ package rtmp
 import (
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/rtmp"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/rs/zerolog/log"
 	"io"
 	"net/http"
@@ -16,7 +16,7 @@ func Init() {
 	api.HandleFunc("api/stream.flv", apiHandle)
 }
 
-func streamsHandle(url string) (streamer.Producer, error) {
+func streamsHandle(url string) (core.Producer, error) {
 	conn := rtmp.NewClient(url)
 	if err := conn.Dial(); err != nil {
 		return nil, err

cmd/rtsp/rtsp.go

@@ -3,9 +3,9 @@ package rtsp
 import (
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mp4"
 	"github.com/AlexxIT/go2rtc/pkg/rtsp"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"github.com/rs/zerolog"
 	"net"
@@ -86,9 +86,9 @@ var Port string
 
 var log zerolog.Logger
 var handlers []Handler
-var defaultMedias []*streamer.Media
+var defaultMedias []*core.Media
 
-func rtspHandler(url string) (streamer.Producer, error) {
+func rtspHandler(url string) (core.Producer, error) {
 	backchannel := true
 
 	if i := strings.IndexByte(url, '#'); i > 0 {
@@ -98,11 +98,7 @@ func rtspHandler(url string) (streamer.Producer, error) {
 		url = url[:i]
 	}
 
-	conn, err := rtsp.NewClient(url)
-	if err != nil {
-		return nil, err
-	}
-
+	conn := rtsp.NewClient(url)
 	conn.UserAgent = app.UserAgent
 
 	if log.Trace().Enabled() {
@@ -118,12 +114,12 @@ func rtspHandler(url string) (streamer.Producer, error) {
 		})
 	}
 
-	if err = conn.Dial(); err != nil {
+	if err := conn.Dial(); err != nil {
 		return nil, err
 	}
 
 	conn.Backchannel = backchannel
-	if err = conn.Describe(); err != nil {
+	if err := conn.Describe(); err != nil {
 		if !backchannel {
 			return nil, err
 		}
@@ -211,9 +207,6 @@ func tcpHandler(conn *rtsp.Conn) {
 			closer = func() {
 				stream.RemoveProducer(conn)
 			}
-
-		case streamer.StatePlaying:
-			log.Debug().Str("stream", name).Msg("[rtsp] start")
 		}
 	})
 

cmd/streams/consumer.go

@@ -1,15 +0,0 @@
-package streams
-
-import (
-	"encoding/json"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
-)
-
-type Consumer struct {
-	element streamer.Consumer
-	tracks  []*streamer.Track
-}
-
-func (c *Consumer) MarshalJSON() ([]byte, error) {
-	return json.Marshal(c.element)
-}

cmd/streams/handlers.go

@@ -2,12 +2,12 @@ package streams
 
 import (
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"strings"
 	"sync"
 )
 
-type Handler func(url string) (streamer.Producer, error)
+type Handler func(url string) (core.Producer, error)
 
 var handlers = map[string]Handler{}
 var handlersMu sync.Mutex
@@ -32,7 +32,7 @@ func HasProducer(url string) bool {
 	return getHandler(url) != nil
 }
 
-func GetProducer(url string) (streamer.Producer, error) {
+func GetProducer(url string) (core.Producer, error) {
 	handler := getHandler(url)
 	if handler == nil {
 		return nil, fmt.Errorf("unsupported scheme: %s", url)

cmd/streams/play.go

@@ -2,14 +2,14 @@ package streams
 
 import (
 	"errors"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
 func (s *Stream) Play(source string) error {
 	s.mu.Lock()
 	for _, producer := range s.producers {
-		if producer.state == stateInternal && producer.element != nil {
-			_ = producer.element.Stop()
+		if producer.state == stateInternal && producer.conn != nil {
+			_ = producer.conn.Stop()
 		}
 	}
 	s.mu.Unlock()
@@ -18,14 +18,14 @@ func (s *Stream) Play(source string) error {
 		return nil
 	}
 
-	var src streamer.Producer
+	var src core.Producer
 
 	for _, producer := range s.producers {
-		if producer.element == nil {
+		if producer.conn == nil {
 			continue
 		}
 
-		cons, ok := producer.element.(streamer.Consumer)
+		cons, ok := producer.conn.(core.Consumer)
 		if !ok {
 			continue
 		}
@@ -59,7 +59,7 @@ func (s *Stream) Play(source string) error {
 		}
 
 		// check if client support consumer interface
-		cons, ok := dst.(streamer.Consumer)
+		cons, ok := dst.(core.Consumer)
 		if !ok {
 			_ = dst.Stop()
 			continue
@@ -98,50 +98,49 @@ func (s *Stream) Play(source string) error {
 	return errors.New("can't find consumer")
 }
 
-func (s *Stream) AddInternalProducer(prod streamer.Producer) {
-	producer := &Producer{element: prod, state: stateInternal}
+func (s *Stream) AddInternalProducer(conn core.Producer) {
+	producer := &Producer{conn: conn, state: stateInternal}
 	s.mu.Lock()
 	s.producers = append(s.producers, producer)
 	s.mu.Unlock()
 }
 
-func (s *Stream) AddInternalConsumer(cons streamer.Consumer) {
-	consumer := &Consumer{element: cons}
+func (s *Stream) AddInternalConsumer(conn core.Consumer) {
 	s.mu.Lock()
-	s.consumers = append(s.consumers, consumer)
+	s.consumers = append(s.consumers, conn)
 	s.mu.Unlock()
 }
 
-func (s *Stream) RemoveInternalConsumer(cons streamer.Consumer) {
+func (s *Stream) RemoveInternalConsumer(conn core.Consumer) {
 	s.mu.Lock()
 	for i, consumer := range s.consumers {
-		if consumer.element == cons {
-			s.removeConsumer(i)
+		if consumer == conn {
+			s.consumers = append(s.consumers[:i], s.consumers[i+1:]...)
 			break
 		}
 	}
 	s.mu.Unlock()
 }
 
-func matchMedia(prod streamer.Producer, cons streamer.Consumer) bool {
+func matchMedia(prod core.Producer, cons core.Consumer) bool {
 	for _, consMedia := range cons.GetMedias() {
 		for _, prodMedia := range prod.GetMedias() {
-			// codec negotiation
-			prodCodec := prodMedia.MatchMedia(consMedia)
+			if prodMedia.Direction != core.DirectionRecvonly {
+				continue
+			}
+
+			prodCodec, consCodec := prodMedia.MatchMedia(consMedia)
 			if prodCodec == nil {
 				continue
 			}
 
-			// setup producer track
-			prodTrack := prod.GetTrack(prodMedia, prodCodec)
-			if prodTrack == nil {
-				return false
+			track, err := prod.GetTrack(prodMedia, prodCodec)
+			if err != nil {
+				continue
 			}
 
-			// setup consumer track
-			consTrack := cons.AddTrack(consMedia, prodTrack)
-			if consTrack == nil {
-				return false
+			if err = cons.AddTrack(consMedia, consCodec, track); err != nil {
+				continue
 			}
 
 			return true

cmd/streams/producer.go

@@ -2,7 +2,8 @@ package streams
 
 import (
 	"encoding/json"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"errors"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"strings"
 	"sync"
 	"time"
@@ -20,20 +21,95 @@ const (
 )
 
 type Producer struct {
-	streamer.Element
+	core.Listener
 
 	url      string
 	template string
 
-	element streamer.Producer
+	conn      core.Producer
+	receivers []*core.Receiver
+	senders   []*core.Receiver
+
 	lastErr error
-	tracks  []*streamer.Track
 
 	state    state
 	mu       sync.Mutex
 	workerID int
 }
 
+func (p *Producer) Dial() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.state == stateNone {
+		conn, err := GetProducer(p.url)
+		if err != nil {
+			return err
+		}
+
+		p.conn = conn
+		p.state = stateMedias
+	}
+
+	return nil
+}
+
+func (p *Producer) GetMedias() []*core.Media {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.conn.GetMedias()
+}
+
+func (p *Producer) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.state == stateNone {
+		return nil, errors.New("get track from none state")
+	}
+
+	for _, track := range p.receivers {
+		if track.Codec == codec {
+			return track, nil
+		}
+	}
+
+	track, err := p.conn.GetTrack(media, codec)
+	if err != nil {
+		return nil, err
+	}
+
+	p.receivers = append(p.receivers, track)
+
+	if p.state == stateMedias {
+		p.state = stateTracks
+	}
+
+	return track, nil
+}
+
+func (p *Producer) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiver) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.state == stateNone {
+		return errors.New("add track from none state")
+	}
+
+	if err := p.conn.(core.Consumer).AddTrack(media, codec, track); err != nil {
+		return err
+	}
+
+	p.senders = append(p.senders, track)
+
+	if p.state == stateMedias {
+		p.state = stateTracks
+	}
+
+	return nil
+}
+
 func (p *Producer) SetSource(s string) {
 	if p.template == "" {
 		p.template = p.url
@@ -41,64 +117,12 @@ func (p *Producer) SetSource(s string) {
 	p.url = strings.Replace(p.template, "{input}", s, 1)
 }
 
-func (p *Producer) GetMedias() []*streamer.Media {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	if p.state == stateNone {
-		log.Debug().Msgf("[streams] probe producer url=%s", p.url)
-
-		p.element, p.lastErr = GetProducer(p.url)
-		if p.lastErr != nil || p.element == nil {
-			log.Error().Err(p.lastErr).Str("url", p.url).Caller().Send()
-			return nil
-		}
-
-		p.state = stateMedias
-	}
-
-	// if element in reconnect state
-	if p.element == nil {
-		return nil
-	}
-
-	return p.element.GetMedias()
-}
-
-func (p *Producer) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	if p.state == stateNone {
-		return nil
-	}
-
-	for _, track := range p.tracks {
-		if track.Codec == codec {
-			return track
-		}
-	}
-
-	track := p.element.GetTrack(media, codec)
-	if track == nil {
-		return nil
-	}
-
-	p.tracks = append(p.tracks, track)
-
-	if p.state == stateMedias {
-		p.state = stateTracks
-	}
-
-	return track
-}
-
 func (p *Producer) MarshalJSON() ([]byte, error) {
-	if p.element != nil {
-		return json.Marshal(p.element)
+	if p.conn != nil {
+		return json.Marshal(p.conn)
 	}
 
-	info := streamer.Info{URL: p.url}
+	info := core.Info{URL: p.url}
 	return json.Marshal(info)
 }
 
@@ -117,11 +141,11 @@ func (p *Producer) start() {
 	p.state = stateStart
 	p.workerID++
 
-	go p.worker(p.element, p.workerID)
+	go p.worker(p.conn, p.workerID)
 }
 
-func (p *Producer) worker(element streamer.Producer, workerID int) {
-	if err := element.Start(); err != nil {
+func (p *Producer) worker(conn core.Producer, workerID int) {
+	if err := conn.Start(); err != nil {
 		p.mu.Lock()
 		closed := p.workerID != workerID
 		p.mu.Unlock()
@@ -147,9 +171,8 @@ func (p *Producer) reconnect(workerID int) {
 
 	log.Debug().Msgf("[streams] reconnect to url=%s", p.url)
 
-	p.element, p.lastErr = GetProducer(p.url)
-	if p.lastErr != nil || p.element == nil {
-		log.Debug().Msgf("[streams] producer=%s", p.lastErr)
+	if err := p.Dial(); err != nil {
+		log.Debug().Msgf("[streams] producer=%s", err)
 		// TODO: dynamic timeout
 		time.AfterFunc(30*time.Second, func() {
 			p.reconnect(workerID)
@@ -157,27 +180,37 @@ func (p *Producer) reconnect(workerID int) {
 		return
 	}
 
-	medias := p.element.GetMedias()
+	for _, media := range p.conn.GetMedias() {
+		switch media.Direction {
+		case core.DirectionRecvonly:
+			for _, receiver := range p.receivers {
+				codec := media.MatchCodec(receiver.Codec)
+				if codec == nil {
+					continue
+				}
 
-	// convert all old producer tracks to new tracks
-	for i, oldTrack := range p.tracks {
-		// match new element medias with old track codec
-		for _, media := range medias {
-			codec := media.MatchCodec(oldTrack.Codec)
-			if codec == nil {
-				continue
+				track, err := p.conn.GetTrack(media, codec)
+				if err != nil {
+					continue
+				}
+
+				receiver.Replace(track)
+				break
 			}
 
-			// move sink from old track to new track
-			newTrack := p.element.GetTrack(media, codec)
-			newTrack.GetSink(oldTrack)
-			p.tracks[i] = newTrack
+		case core.DirectionSendonly:
+			for _, sender := range p.senders {
+				codec := media.MatchCodec(sender.Codec)
+				if codec == nil {
+					continue
+				}
 
-			break
+				_ = p.conn.(core.Consumer).AddTrack(media, codec, sender)
+			}
 		}
 	}
 
-	go p.worker(p.element, workerID)
+	go p.worker(p.conn, workerID)
 }
 
 func (p *Producer) stop() {
@@ -197,11 +230,12 @@ func (p *Producer) stop() {
 
 	log.Debug().Msgf("[streams] stop producer url=%s", p.url)
 
-	if p.element != nil {
-		_ = p.element.Stop()
-		p.element = nil
+	if p.conn != nil {
+		_ = p.conn.Stop()
+		p.conn = nil
 	}
 
 	p.state = stateNone
-	p.tracks = nil
+	p.receivers = nil
+	p.senders = nil
 }

cmd/streams/stream.go

@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -12,12 +12,12 @@ import (
 
 type Stream struct {
 	producers []*Producer
-	consumers []*Consumer
+	consumers []core.Consumer
 	mu        sync.Mutex
 	requests  int32
 }
 
-func NewStream(source interface{}) *Stream {
+func NewStream(source any) *Stream {
 	switch source := source.(type) {
 	case string:
 		s := new(Stream)
@@ -38,7 +38,7 @@ func NewStream(source interface{}) *Stream {
 	case nil:
 		return new(Stream)
 	default:
-		panic("wrong source type")
+		panic(core.Caller())
 	}
 }
 
@@ -48,57 +48,71 @@ func (s *Stream) SetSource(source string) {
 	}
 }
 
-func (s *Stream) AddConsumer(cons streamer.Consumer) (err error) {
+func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 	// support for multiple simultaneous requests from different consumers
 	atomic.AddInt32(&s.requests, 1)
 
-	ic := len(s.consumers)
-
-	consumer := &Consumer{element: cons}
 	var producers []*Producer // matched producers for consumer
 
 	var codecs string
 
 	// Step 1. Get consumer medias
-	for icc, consMedia := range cons.GetMedias() {
-		log.Trace().Stringer("media", consMedia).
-			Msgf("[streams] consumer=%d candidate=%d", ic, icc)
+	for _, consMedia := range cons.GetMedias() {
 
 	producers:
-		for ip, prod := range s.producers {
-			// Step 2. Get producer medias (not tracks yet)
-			for ipc, prodMedia := range prod.GetMedias() {
-				log.Trace().Stringer("media", prodMedia).
-					Msgf("[streams] producer=%d candidate=%d", ip, ipc)
+		for _, prod := range s.producers {
+			if err = prod.Dial(); err != nil {
+				continue
+			}
 
+			// Step 2. Get producer medias (not tracks yet)
+			for _, prodMedia := range prod.GetMedias() {
 				collectCodecs(prodMedia, &codecs)
 
 				// Step 3. Match consumer/producer codecs list
-				prodCodec := prodMedia.MatchMedia(consMedia)
-				if prodCodec != nil {
-					log.Trace().Stringer("codec", prodCodec).
-						Msgf("[streams] match producer:%d:%d => consumer:%d:%d", ip, ipc, ic, icc)
+				prodCodec, consCodec := prodMedia.MatchMedia(consMedia)
+				if prodCodec == nil {
+					continue
+				}
 
-					// Step 4. Get producer track
-					prodTrack := prod.GetTrack(prodMedia, prodCodec)
-					if prodTrack == nil {
-						log.Warn().Str("url", prod.url).Msg("[streams] can't get track")
+				var track *core.Receiver
+
+				switch prodMedia.Direction {
+				case core.DirectionRecvonly:
+					// Step 4. Get recvonly track from producer
+					if track, err = prod.GetTrack(prodMedia, prodCodec); err != nil {
+						log.Info().Err(err).Msg("[streams] can't get track")
+						continue
+					}
+					// Step 5. Add track to consumer
+					if err = cons.AddTrack(consMedia, consCodec, track); err != nil {
+						log.Info().Err(err).Msg("[streams] can't add track")
 						continue
 					}
 
-					// Step 5. Add track to consumer and get new track
-					consTrack := consumer.element.AddTrack(consMedia, prodTrack)
-
-					consumer.tracks = append(consumer.tracks, consTrack)
-					producers = append(producers, prod)
-					if !consMedia.MatchAll() {
-						break producers
+				case core.DirectionSendonly:
+					// Step 4. Get recvonly track from consumer (backchannel)
+					if track, err = cons.(core.Producer).GetTrack(consMedia, consCodec); err != nil {
+						log.Info().Err(err).Msg("[streams] can't get track")
+						continue
 					}
+					// Step 5. Add track to producer
+					if err = prod.AddTrack(prodMedia, prodCodec, track); err != nil {
+						log.Info().Err(err).Msg("[streams] can't add track")
+						continue
+					}
+				}
+
+				producers = append(producers, prod)
+
+				if !consMedia.MatchAll() {
+					break producers
 				}
 			}
 		}
 	}
 
+	// stop producers if they don't have readers
 	if atomic.AddInt32(&s.requests, -1) == 0 {
 		s.stopProducers()
 	}
@@ -118,7 +132,7 @@ func (s *Stream) AddConsumer(cons streamer.Consumer) (err error) {
 	}
 
 	s.mu.Lock()
-	s.consumers = append(s.consumers, consumer)
+	s.consumers = append(s.consumers, cons)
 	s.mu.Unlock()
 
 	// there may be duplicates, but that's not a problem
@@ -129,16 +143,13 @@ func (s *Stream) AddConsumer(cons streamer.Consumer) (err error) {
 	return nil
 }
 
-func (s *Stream) RemoveConsumer(cons streamer.Consumer) {
+func (s *Stream) RemoveConsumer(cons core.Consumer) {
+	_ = cons.Stop()
+
 	s.mu.Lock()
 	for i, consumer := range s.consumers {
-		if consumer.element == cons {
-			// remove consumer pads from all producers
-			for _, track := range consumer.tracks {
-				track.Unbind()
-			}
-			// remove consumer from slice
-			s.removeConsumer(i)
+		if consumer == cons {
+			s.consumers = append(s.consumers[:i], s.consumers[i+1:]...)
 			break
 		}
 	}
@@ -147,18 +158,18 @@ func (s *Stream) RemoveConsumer(cons streamer.Consumer) {
 	s.stopProducers()
 }
 
-func (s *Stream) AddProducer(prod streamer.Producer) {
-	producer := &Producer{element: prod, state: stateExternal}
+func (s *Stream) AddProducer(prod core.Producer) {
+	producer := &Producer{conn: prod, state: stateExternal}
 	s.mu.Lock()
 	s.producers = append(s.producers, producer)
 	s.mu.Unlock()
 }
 
-func (s *Stream) RemoveProducer(prod streamer.Producer) {
+func (s *Stream) RemoveProducer(prod core.Producer) {
 	s.mu.Lock()
 	for i, producer := range s.producers {
-		if producer.element == prod {
-			s.removeProducer(i)
+		if producer.conn == prod {
+			s.producers = append(s.producers[:i], s.producers[i+1:]...)
 			break
 		}
 	}
@@ -169,8 +180,8 @@ func (s *Stream) stopProducers() {
 	s.mu.Lock()
 producers:
 	for _, producer := range s.producers {
-		for _, track := range producer.tracks {
-			if track.HasSink() {
+		for _, track := range producer.receivers {
+			if len(track.Senders()) > 0 {
 				continue producers
 			}
 		}
@@ -179,20 +190,6 @@ producers:
 	s.mu.Unlock()
 }
 
-//func (s *Stream) Active() bool {
-//	if len(s.consumers) > 0 {
-//		return true
-//	}
-//
-//	for _, prod := range s.producers {
-//		if prod.element != nil {
-//			return true
-//		}
-//	}
-//
-//	return false
-//}
-
 func (s *Stream) MarshalJSON() ([]byte, error) {
 	if !s.mu.TryLock() {
 		log.Warn().Msgf("[streams] json locked")
@@ -200,8 +197,8 @@ func (s *Stream) MarshalJSON() ([]byte, error) {
 	}
 
 	var info struct {
-		Producers []*Producer `json:"producers"`
-		Consumers []*Consumer `json:"consumers"`
+		Producers []*Producer     `json:"producers"`
+		Consumers []core.Consumer `json:"consumers"`
 	}
 	info.Producers = s.producers
 	info.Consumers = s.consumers
@@ -211,40 +208,14 @@ func (s *Stream) MarshalJSON() ([]byte, error) {
 	return json.Marshal(info)
 }
 
-func (s *Stream) removeConsumer(i int) {
-	switch {
-	case len(s.consumers) == 1: // only one element
-		s.consumers = nil
-	case i == 0: // first element
-		s.consumers = s.consumers[1:]
-	case i == len(s.consumers)-1: // last element
-		s.consumers = s.consumers[:i]
-	default: // middle element
-		s.consumers = append(s.consumers[:i], s.consumers[i+1:]...)
-	}
-}
-
-func (s *Stream) removeProducer(i int) {
-	switch {
-	case len(s.producers) == 1: // only one element
-		s.producers = nil
-	case i == 0: // first element
-		s.producers = s.producers[1:]
-	case i == len(s.producers)-1: // last element
-		s.producers = s.producers[:i]
-	default: // middle element
-		s.producers = append(s.producers[:i], s.producers[i+1:]...)
-	}
-}
-
-func collectCodecs(media *streamer.Media, codecs *string) {
-	if media.Direction == streamer.DirectionRecvonly {
+func collectCodecs(media *core.Media, codecs *string) {
+	if media.Direction == core.DirectionRecvonly {
 		return
 	}
 
 	for _, codec := range media.Codecs {
 		name := codec.Name
-		if name == streamer.CodecAAC {
+		if name == core.CodecAAC {
 			name = "AAC"
 		}
 		if strings.Contains(*codecs, name) {

cmd/tapo/tapo.go

@@ -2,7 +2,7 @@ package tapo
 
 import (
 	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/tapo"
 )
 
@@ -10,7 +10,7 @@ func Init() {
 	streams.HandleFunc("tapo", handle)
 }
 
-func handle(url string) (streamer.Producer, error) {
+func handle(url string) (core.Producer, error) {
 	conn := tapo.NewClient(url)
 	if err := conn.Dial(); err != nil {
 		return nil, err

cmd/webrtc/client.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/AlexxIT/go2rtc/pkg/webrtc"
 	"github.com/gorilla/websocket"
 	pion "github.com/pion/webrtc/v3"
@@ -14,7 +13,7 @@ import (
 	"time"
 )
 
-func streamsHandler(url string) (streamer.Producer, error) {
+func streamsHandler(url string) (core.Producer, error) {
 	url = url[7:]
 	if i := strings.Index(url, "://"); i > 0 {
 		switch url[:i] {
@@ -29,7 +28,7 @@ func streamsHandler(url string) (streamer.Producer, error) {
 
 // asyncClient can connect only to go2rtc server
 // ex: ws://localhost:1984/api/ws?src=camera1
-func asyncClient(url string) (streamer.Producer, error) {
+func asyncClient(url string) (core.Producer, error) {
 	// 1. Connect to signalign server
 	ws, _, err := websocket.DefaultDialer.Dial(url, nil)
 	if err != nil {
@@ -52,7 +51,7 @@ func asyncClient(url string) (streamer.Producer, error) {
 
 	prod := webrtc.NewConn(pc)
 	prod.Desc = "WebRTC/WebSocket async"
-	prod.Mode = streamer.ModeActiveProducer
+	prod.Mode = core.ModeActiveProducer
 	prod.Listen(func(msg any) {
 		switch msg := msg.(type) {
 		case pion.PeerConnectionState:
@@ -67,10 +66,10 @@ func asyncClient(url string) (streamer.Producer, error) {
 		}
 	})
 
-	medias := []*streamer.Media{
-		{Kind: streamer.KindVideo, Direction: streamer.DirectionRecvonly},
-		{Kind: streamer.KindAudio, Direction: streamer.DirectionRecvonly},
-		{Kind: streamer.KindAudio, Direction: streamer.DirectionSendonly},
+	medias := []*core.Media{
+		{Kind: core.KindVideo, Direction: core.DirectionRecvonly},
+		{Kind: core.KindAudio, Direction: core.DirectionRecvonly},
+		{Kind: core.KindAudio, Direction: core.DirectionSendonly},
 	}
 
 	// 3. Create offer
@@ -129,7 +128,7 @@ func asyncClient(url string) (streamer.Producer, error) {
 
 // syncClient - support WebRTC-HTTP Egress Protocol (WHEP)
 // ex: http://localhost:1984/api/webrtc?src=camera1
-func syncClient(url string) (streamer.Producer, error) {
+func syncClient(url string) (core.Producer, error) {
 	// 2. Create PeerConnection
 	pc, err := PeerConnection(true)
 	if err != nil {
@@ -139,11 +138,11 @@ func syncClient(url string) (streamer.Producer, error) {
 
 	prod := webrtc.NewConn(pc)
 	prod.Desc = "WebRTC/WHEP sync"
-	prod.Mode = streamer.ModeActiveProducer
+	prod.Mode = core.ModeActiveProducer
 
-	medias := []*streamer.Media{
-		{Kind: streamer.KindVideo, Direction: streamer.DirectionRecvonly},
-		{Kind: streamer.KindAudio, Direction: streamer.DirectionRecvonly},
+	medias := []*core.Media{
+		{Kind: core.KindVideo, Direction: core.DirectionRecvonly},
+		{Kind: core.KindAudio, Direction: core.DirectionRecvonly},
 	}
 
 	// 3. Create offer

cmd/webrtc/init.go

@@ -6,7 +6,6 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
 	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/AlexxIT/go2rtc/pkg/webrtc"
 	pion "github.com/pion/webrtc/v3"
 	"github.com/rs/zerolog"
@@ -87,16 +86,16 @@ var PeerConnection func(active bool) (*pion.PeerConnection, error)
 
 func asyncHandler(tr *api.Transport, msg *api.Message) error {
 	var stream *streams.Stream
-	var mode streamer.Mode
+	var mode core.Mode
 
 	query := tr.Request.URL.Query()
 	if name := query.Get("src"); name != "" {
 		stream = streams.GetOrNew(name)
-		mode = streamer.ModePassiveConsumer
+		mode = core.ModePassiveConsumer
 		log.Debug().Str("src", name).Msg("[webrtc] new consumer")
 	} else if name = query.Get("dst"); name != "" {
 		stream = streams.Get(name)
-		mode = streamer.ModePassiveProducer
+		mode = core.ModePassiveProducer
 		log.Debug().Str("src", name).Msg("[webrtc] new producer")
 	}
 
@@ -124,9 +123,9 @@ func asyncHandler(tr *api.Transport, msg *api.Message) error {
 				return
 			}
 			switch mode {
-			case streamer.ModePassiveConsumer:
+			case core.ModePassiveConsumer:
 				stream.RemoveConsumer(conn)
-			case streamer.ModePassiveProducer:
+			case core.ModePassiveProducer:
 				stream.RemoveProducer(conn)
 			}
 
@@ -158,14 +157,14 @@ func asyncHandler(tr *api.Transport, msg *api.Message) error {
 	}
 
 	switch mode {
-	case streamer.ModePassiveConsumer:
+	case core.ModePassiveConsumer:
 		// 2. AddConsumer, so we get new tracks
 		if err = stream.AddConsumer(conn); err != nil {
 			log.Debug().Err(err).Msg("[webrtc] add consumer")
 			_ = conn.Close()
 			return err
 		}
-	case streamer.ModePassiveProducer:
+	case core.ModePassiveProducer:
 		stream.AddProducer(conn)
 	}
 
@@ -202,9 +201,9 @@ func ExchangeSDP(stream *streams.Stream, offer, desc, userAgent string) (answer
 	// create new webrtc instance
 	conn := webrtc.NewConn(pc)
 	conn.Desc = desc
-	conn.Mode = streamer.ModePassiveConsumer
+	conn.Mode = core.ModePassiveConsumer
 	conn.UserAgent = userAgent
-	conn.Listen(func(msg interface{}) {
+	conn.Listen(func(msg any) {
 		switch msg := msg.(type) {
 		case pion.PeerConnectionState:
 			if msg == pion.PeerConnectionStateClosed {

cmd/webrtc/server.go

@@ -3,7 +3,7 @@ package webrtc
 import (
 	"encoding/json"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/webrtc"
 	pion "github.com/pion/webrtc/v3"
 	"io"
@@ -161,7 +161,7 @@ func inputWebRTC(w http.ResponseWriter, r *http.Request) {
 	// create new webrtc instance
 	prod := webrtc.NewConn(pc)
 	prod.Desc = "WebRTC/WHIP sync"
-	prod.Mode = streamer.ModePassiveProducer
+	prod.Mode = core.ModePassiveProducer
 	prod.UserAgent = r.UserAgent()
 
 	if err = prod.SetOffer(string(offer)); err != nil {

cmd/webtorrent/init.go

@@ -8,7 +8,6 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/streams"
 	"github.com/AlexxIT/go2rtc/cmd/webrtc"
 	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/AlexxIT/go2rtc/pkg/webtorrent"
 	"github.com/rs/zerolog"
 	"net/http"
@@ -142,7 +141,7 @@ func apiHandle(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-func streamHandle(rawURL string) (streamer.Producer, error) {
+func streamHandle(rawURL string) (core.Producer, error) {
 	u, err := url.Parse(rawURL)
 	if err != nil {
 		return nil, err

pkg/aac/rtp.go

@@ -2,62 +2,59 @@ package aac
 
 import (
 	"encoding/binary"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtp"
 )
 
 const RTPPacketVersionAAC = 0
 
-func RTPDepay(track *streamer.Track) streamer.WrapperFunc {
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			// support ONLY 2 bytes header size!
-			// streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408
-			headersSize := binary.BigEndian.Uint16(packet.Payload) >> 3
+func RTPDepay(handler core.HandlerFunc) core.HandlerFunc {
+	return func(packet *rtp.Packet) {
+		// support ONLY 2 bytes header size!
+		// streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408
+		headersSize := binary.BigEndian.Uint16(packet.Payload) >> 3
 
-			//log.Printf("[RTP/AAC] units: %d, size: %4d, ts: %10d, %t", headersSize/2, len(packet.Payload), packet.Timestamp, packet.Marker)
+		//log.Printf("[RTP/AAC] units: %d, size: %4d, ts: %10d, %t", headersSize/2, len(packet.Payload), packet.Timestamp, packet.Marker)
 
-			data := packet.Payload[2+headersSize:]
-			if IsADTS(data) {
-				data = data[7:]
-			}
-
-			clone := *packet
-			clone.Version = RTPPacketVersionAAC
-			clone.Payload = data
-			return push(&clone)
+		data := packet.Payload[2+headersSize:]
+		if IsADTS(data) {
+			data = data[7:]
 		}
+
+		clone := *packet
+		clone.Version = RTPPacketVersionAAC
+		clone.Payload = data
+		handler(&clone)
 	}
 }
 
-func RTPPay(mtu uint16) streamer.WrapperFunc {
+func RTPPay(handler core.HandlerFunc) core.HandlerFunc {
 	sequencer := rtp.NewRandomSequencer()
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			if packet.Version != RTPPacketVersionAAC {
-				return push(packet)
-			}
-
-			// support ONLY one unit in payload
-			size := uint16(len(packet.Payload))
-			// 2 bytes header size + 2 bytes first payload size
-			payload := make([]byte, 2+2+size)
-			payload[1] = 16 // header size in bits
-			binary.BigEndian.PutUint16(payload[2:], size<<3)
-			copy(payload[4:], packet.Payload)
-
-			clone := rtp.Packet{
-				Header: rtp.Header{
-					Version:        2,
-					Marker:         true,
-					SequenceNumber: sequencer.NextSequenceNumber(),
-					Timestamp:      packet.Timestamp,
-				},
-				Payload: payload,
-			}
-			return push(&clone)
+	return func(packet *rtp.Packet) {
+		if packet.Version != RTPPacketVersionAAC {
+			handler(packet)
+			return
 		}
+
+		// support ONLY one unit in payload
+		size := uint16(len(packet.Payload))
+		// 2 bytes header size + 2 bytes first payload size
+		payload := make([]byte, 2+2+size)
+		payload[1] = 16 // header size in bits
+		binary.BigEndian.PutUint16(payload[2:], size<<3)
+		copy(payload[4:], packet.Payload)
+
+		clone := rtp.Packet{
+			Header: rtp.Header{
+				Version:        2,
+				Marker:         true,
+				SequenceNumber: sequencer.NextSequenceNumber(),
+				Timestamp:      packet.Timestamp,
+			},
+			Payload: payload,
+		}
+		handler(&clone)
 	}
 }
 

pkg/core/codec.go

@@ -0,0 +1,142 @@
+package core
+
+import (
+	"encoding/base64"
+	"fmt"
+	"github.com/pion/sdp/v3"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+type Codec struct {
+	Name        string // H264, PCMU, PCMA, opus...
+	ClockRate   uint32 // 90000, 8000, 16000...
+	Channels    uint16 // 0, 1, 2
+	FmtpLine    string
+	PayloadType uint8
+}
+
+func (c *Codec) String() string {
+	s := fmt.Sprintf("%d %s", c.PayloadType, c.Name)
+	if c.ClockRate != 0 && c.ClockRate != 90000 {
+		s = fmt.Sprintf("%s/%d", s, c.ClockRate)
+	}
+	if c.Channels > 0 {
+		s = fmt.Sprintf("%s/%d", s, c.Channels)
+	}
+	return s
+}
+
+func (c *Codec) Text() string {
+	switch c.Name {
+	case CodecH264:
+		if profile := DecodeH264(c.FmtpLine); profile != "" {
+			return "H.264 " + profile
+		}
+		return c.Name
+	}
+
+	s := c.Name
+	if c.ClockRate != 0 && c.ClockRate != 90000 {
+		s += "/" + strconv.Itoa(int(c.ClockRate))
+	}
+	if c.Channels > 0 {
+		s += "/" + strconv.Itoa(int(c.Channels))
+	}
+	return s
+}
+
+func (c *Codec) IsRTP() bool {
+	return c.PayloadType != PayloadTypeRAW
+}
+
+func (c *Codec) Clone() *Codec {
+	clone := *c
+	return &clone
+}
+
+func (c *Codec) Match(remote *Codec) bool {
+	switch remote.Name {
+	case CodecAll, CodecAny:
+		return true
+	}
+
+	return c.Name == remote.Name &&
+		(c.ClockRate == remote.ClockRate || remote.ClockRate == 0) &&
+		(c.Channels == remote.Channels || remote.Channels == 0)
+}
+
+func UnmarshalCodec(md *sdp.MediaDescription, payloadType string) *Codec {
+	c := &Codec{PayloadType: byte(atoi(payloadType))}
+
+	for _, attr := range md.Attributes {
+		switch {
+		case c.Name == "" && attr.Key == "rtpmap" && strings.HasPrefix(attr.Value, payloadType):
+			i := strings.IndexByte(attr.Value, ' ')
+			ss := strings.Split(attr.Value[i+1:], "/")
+
+			c.Name = strings.ToUpper(ss[0])
+			// fix tailing space: `a=rtpmap:96 H264/90000 `
+			c.ClockRate = uint32(atoi(strings.TrimRightFunc(ss[1], unicode.IsSpace)))
+
+			if len(ss) == 3 && ss[2] == "2" {
+				c.Channels = 2
+			}
+		case c.FmtpLine == "" && attr.Key == "fmtp" && strings.HasPrefix(attr.Value, payloadType):
+			if i := strings.IndexByte(attr.Value, ' '); i > 0 {
+				c.FmtpLine = attr.Value[i+1:]
+			}
+		}
+	}
+
+	if c.Name == "" {
+		// https://en.wikipedia.org/wiki/RTP_payload_formats
+		switch payloadType {
+		case "0":
+			c.Name = CodecPCMU
+			c.ClockRate = 8000
+		case "8":
+			c.Name = CodecPCMA
+			c.ClockRate = 8000
+		case "14":
+			c.Name = CodecMP3
+			c.ClockRate = 44100
+		case "26":
+			c.Name = CodecJPEG
+			c.ClockRate = 90000
+		default:
+			c.Name = payloadType
+		}
+	}
+
+	return c
+}
+
+func atoi(s string) (i int) {
+	i, _ = strconv.Atoi(s)
+	return
+}
+
+func DecodeH264(fmtp string) string {
+	if ps := Between(fmtp, "sprop-parameter-sets=", ","); ps != "" {
+		if sps, _ := base64.StdEncoding.DecodeString(ps); len(sps) >= 4 {
+			var profile string
+			switch sps[1] {
+			case 0x42:
+				profile = "Baseline"
+			case 0x4D:
+				profile = "Main"
+			case 0x58:
+				profile = "Extended"
+			case 0x64:
+				profile = "High"
+			default:
+				profile = fmt.Sprintf("0x%02X", sps[1])
+			}
+
+			return fmt.Sprintf("%s %d.%d", profile, sps[3]/10, sps[3]%10)
+		}
+	}
+	return ""
+}

pkg/core/core.go

@@ -0,0 +1,99 @@
+package core
+
+const (
+	DirectionRecvonly = "recvonly"
+	DirectionSendonly = "sendonly"
+	DirectionSendRecv = "sendrecv"
+)
+
+const (
+	KindVideo = "video"
+	KindAudio = "audio"
+)
+
+const (
+	CodecH264 = "H264" // payloadType: 96
+	CodecH265 = "H265"
+	CodecVP8  = "VP8"
+	CodecVP9  = "VP9"
+	CodecAV1  = "AV1"
+	CodecJPEG = "JPEG" // payloadType: 26
+
+	CodecPCMU = "PCMU" // payloadType: 0
+	CodecPCMA = "PCMA" // payloadType: 8
+	CodecAAC  = "MPEG4-GENERIC"
+	CodecOpus = "OPUS" // payloadType: 111
+	CodecG722 = "G722"
+	CodecMP3  = "MPA" // payload: 14, aka MPEG-1 Layer III
+
+	CodecELD = "ELD" // AAC-ELD
+
+	CodecAll = "ALL"
+	CodecAny = "ANY"
+)
+
+const PayloadTypeRAW byte = 255
+
+type Producer interface {
+	// GetMedias - return Media(s) with local Media.Direction:
+	// - recvonly for Producer Video/Audio
+	// - sendonly for Producer backchannel
+	GetMedias() []*Media
+
+	// GetTrack - return Receiver, that can only produce rtp.Packet(s)
+	GetTrack(media *Media, codec *Codec) (*Receiver, error)
+
+	Start() error
+	Stop() error
+}
+
+type Consumer interface {
+	// GetMedias - return Media(s) with local Media.Direction:
+	// - sendonly for Consumer Video/Audio
+	// - recvonly for Consumer backchannel
+	GetMedias() []*Media
+
+	AddTrack(media *Media, codec *Codec, track *Receiver) error
+
+	Stop() error
+}
+
+type Mode byte
+
+const (
+	ModeActiveProducer Mode = iota + 1 // typical source (client)
+	ModePassiveConsumer
+	ModePassiveProducer
+	ModeActiveConsumer
+)
+
+func (m Mode) String() string {
+	switch m {
+	case ModeActiveProducer:
+		return "active producer"
+	case ModePassiveConsumer:
+		return "passive consumer"
+	case ModePassiveProducer:
+		return "passive producer"
+	case ModeActiveConsumer:
+		return "active consumer"
+	}
+	return "unknown"
+}
+
+type Info struct {
+	Type       string      `json:"type,omitempty"`
+	URL        string      `json:"url,omitempty"`
+	RemoteAddr string      `json:"remote_addr,omitempty"`
+	UserAgent  string      `json:"user_agent,omitempty"`
+	Medias     []*Media    `json:"medias,omitempty"`
+	Receivers  []*Receiver `json:"receivers,omitempty"`
+	Senders    []*Sender   `json:"senders,omitempty"`
+	Recv       int         `json:"recv,omitempty"`
+	Send       int         `json:"send,omitempty"`
+}
+
+const (
+	UnsupportedCodec    = "unsupported codec"
+	WrongMediaDirection = "wrong media direction"
+)

pkg/core/helpers.go

@@ -2,6 +2,10 @@ package core
 
 import (
 	cryptorand "crypto/rand"
+	"github.com/rs/zerolog/log"
+	"runtime"
+	"strconv"
+	"strings"
 )
 
 const digits = "0123456789abcdefghijklmnopqrstuvwxyz"
@@ -17,3 +21,35 @@ func RandString(size byte) string {
 	}
 	return string(b)
 }
+
+func Between(s, sub1, sub2 string) string {
+	i := strings.Index(s, sub1)
+	if i < 0 {
+		return ""
+	}
+	s = s[i+len(sub1):]
+
+	if len(sub2) == 1 {
+		i = strings.IndexByte(s, sub2[0])
+	} else {
+		i = strings.Index(s, sub2)
+	}
+	if i >= 0 {
+		return s[:i]
+	}
+
+	return s
+}
+
+func Assert(ok bool) {
+	if !ok {
+		_, file, line, _ := runtime.Caller(1)
+		panic(file + ":" + strconv.Itoa(line))
+	}
+}
+
+func Caller() string {
+	log.Error().Caller(0).Send()
+	_, file, line, _ := runtime.Caller(1)
+	return file + ":" + strconv.Itoa(line)
+}

pkg/core/listener.go

@@ -0,0 +1,18 @@
+package core
+
+type EventFunc func(msg any)
+
+// Listener base struct for all classes with support feedback
+type Listener struct {
+	events []EventFunc
+}
+
+func (l *Listener) Listen(f EventFunc) {
+	l.events = append(l.events, f)
+}
+
+func (l *Listener) Fire(msg any) {
+	for _, f := range l.events {
+		f(msg)
+	}
+}

pkg/core/media.go

@@ -0,0 +1,191 @@
+package core
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/pion/sdp/v3"
+	"strings"
+)
+
+// Media take best from:
+// - deepch/vdk/format/rtsp/sdp.Media
+// - pion/sdp.MediaDescription
+type Media struct {
+	Kind      string   `json:"kind,omitempty"`      // video or audio
+	Direction string   `json:"direction,omitempty"` // sendonly, recvonly
+	Codecs    []*Codec `json:"codecs,omitempty"`
+
+	ID string `json:"id,omitempty"` // MID for WebRTC, Control for RTSP
+}
+
+func (m *Media) String() string {
+	s := fmt.Sprintf("%s, %s", m.Kind, m.Direction)
+	for _, codec := range m.Codecs {
+		name := codec.Text()
+
+		if strings.Contains(s, name) {
+			continue
+		}
+
+		s += ", " + name
+	}
+	return s
+}
+
+func (m *Media) MarshalJSON() ([]byte, error) {
+	return json.Marshal(m.String())
+}
+
+func (m *Media) Clone() *Media {
+	clone := *m
+	clone.Codecs = make([]*Codec, len(m.Codecs))
+	for i, codec := range m.Codecs {
+		clone.Codecs[i] = codec.Clone()
+	}
+	return &clone
+}
+
+func (m *Media) MatchMedia(remote *Media) (codec, remoteCodec *Codec) {
+	// check same kind and opposite dirrection
+	if m.Kind != remote.Kind ||
+		m.Direction == DirectionSendonly && remote.Direction != DirectionRecvonly ||
+		m.Direction == DirectionRecvonly && remote.Direction != DirectionSendonly {
+		return nil, nil
+	}
+
+	for _, codec = range m.Codecs {
+		for _, remoteCodec = range remote.Codecs {
+			if codec.Match(remoteCodec) {
+				return
+			}
+		}
+	}
+
+	return nil, nil
+}
+
+func (m *Media) MatchCodec(remote *Codec) *Codec {
+	for _, codec := range m.Codecs {
+		if codec.Match(remote) {
+			return codec
+		}
+	}
+	return nil
+}
+
+func (m *Media) MatchAll() bool {
+	for _, codec := range m.Codecs {
+		if codec.Name == CodecAll {
+			return true
+		}
+	}
+	return false
+}
+
+func GetKind(name string) string {
+	switch name {
+	case CodecH264, CodecH265, CodecVP8, CodecVP9, CodecAV1, CodecJPEG:
+		return KindVideo
+	case CodecPCMU, CodecPCMA, CodecAAC, CodecOpus, CodecG722, CodecMP3, CodecELD:
+		return KindAudio
+	}
+	return ""
+}
+
+func MarshalSDP(name string, medias []*Media) ([]byte, error) {
+	sd := &sdp.SessionDescription{
+		Origin: sdp.Origin{
+			Username: "-", SessionID: 1, SessionVersion: 1,
+			NetworkType: "IN", AddressType: "IP4", UnicastAddress: "0.0.0.0",
+		},
+		SessionName: sdp.SessionName(name),
+		ConnectionInformation: &sdp.ConnectionInformation{
+			NetworkType: "IN", AddressType: "IP4", Address: &sdp.Address{
+				Address: "0.0.0.0",
+			},
+		},
+		TimeDescriptions: []sdp.TimeDescription{
+			{Timing: sdp.Timing{}},
+		},
+	}
+
+	for _, media := range medias {
+		if media.Codecs == nil {
+			continue
+		}
+
+		codec := media.Codecs[0]
+
+		name := codec.Name
+		if name == CodecELD {
+			name = CodecAAC
+		}
+
+		md := &sdp.MediaDescription{
+			MediaName: sdp.MediaName{
+				Media:  media.Kind,
+				Protos: []string{"RTP", "AVP"},
+			},
+		}
+		md.WithCodec(codec.PayloadType, name, codec.ClockRate, codec.Channels, codec.FmtpLine)
+
+		sd.MediaDescriptions = append(sd.MediaDescriptions, md)
+	}
+
+	return sd.Marshal()
+}
+
+func UnmarshalMedia(md *sdp.MediaDescription) *Media {
+	m := &Media{
+		Kind: md.MediaName.Media,
+	}
+
+	for _, attr := range md.Attributes {
+		switch attr.Key {
+		case DirectionSendonly, DirectionRecvonly, DirectionSendRecv:
+			m.Direction = attr.Key
+		case "control", "mid":
+			m.ID = attr.Value
+		}
+	}
+
+	for _, format := range md.MediaName.Formats {
+		m.Codecs = append(m.Codecs, UnmarshalCodec(md, format))
+	}
+
+	return m
+}
+
+func ParseQuery(query map[string][]string) (medias []*Media) {
+	// set media candidates from query list
+	for key, values := range query {
+		switch key {
+		case KindVideo, KindAudio:
+			for _, value := range values {
+				media := &Media{Kind: key, Direction: DirectionSendonly}
+
+				for _, name := range strings.Split(value, ",") {
+					name = strings.ToUpper(name)
+
+					// check aliases
+					switch name {
+					case "", "COPY":
+						name = CodecAny
+					case "MJPEG":
+						name = CodecJPEG
+					case "AAC":
+						name = CodecAAC
+					case "MP3":
+						name = CodecMP3
+					}
+
+					media.Codecs = append(media.Codecs, &Codec{Name: name})
+				}
+
+				medias = append(medias, media)
+			}
+		}
+	}
+
+	return
+}

pkg/core/media_test.go

@@ -1,4 +1,4 @@
-package streamer
+package core
 
 import (
 	"fmt"

pkg/core/probe.go

@@ -0,0 +1,31 @@
+package core
+
+import "time"
+
+type Probe struct {
+	deadline time.Time
+	items    map[any]struct{}
+}
+
+func NewProbe(enable bool) *Probe {
+	if enable {
+		return &Probe{
+			deadline: time.Now().Add(time.Second * 3),
+			items:    map[any]struct{}{},
+		}
+	} else {
+		return nil
+	}
+}
+
+// Active return true if probe enabled and not finish
+func (p *Probe) Active() bool {
+	return len(p.items) < 2 && time.Now().Before(p.deadline)
+}
+
+// Append safe to run if Probe is nil
+func (p *Probe) Append(v any) {
+	if p != nil {
+		p.items[v] = struct{}{}
+	}
+}

pkg/core/track.go

@@ -0,0 +1,188 @@
+package core
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"github.com/pion/rtp"
+	"strconv"
+	"sync"
+)
+
+var ErrCantGetTrack = errors.New("can't get track")
+
+type Receiver struct {
+	Codec *Codec
+	Media *Media
+
+	ID byte // Channel for RTSP, PayloadType for MPEG-TS
+
+	senders map[*Sender]chan *rtp.Packet
+	mu      sync.Mutex
+	bytes   int
+}
+
+func NewReceiver(media *Media, codec *Codec) *Receiver {
+	Assert(codec != nil)
+	return &Receiver{Codec: codec, Media: media}
+}
+
+// WriteRTP - fast and non blocking write to all readers buffers
+func (t *Receiver) WriteRTP(packet *rtp.Packet) {
+	t.mu.Lock()
+	t.bytes += len(packet.Payload)
+	for sender, buffer := range t.senders {
+		if len(buffer) < cap(buffer) {
+			buffer <- packet
+		} else {
+			sender.overflow++
+		}
+	}
+	t.mu.Unlock()
+}
+
+func (t *Receiver) Senders() (senders []*Sender) {
+	t.mu.Lock()
+	for sender := range t.senders {
+		senders = append(senders, sender)
+	}
+	t.mu.Unlock()
+	return
+}
+
+func (t *Receiver) Close() {
+	t.mu.Lock()
+	// close all sender channel buffers and erase senders list
+	for _, buffer := range t.senders {
+		close(buffer)
+	}
+	t.senders = nil
+	t.mu.Unlock()
+}
+
+func (t *Receiver) Replace(target *Receiver) {
+	// move this receiver senders to new receiver
+	t.mu.Lock()
+	senders := t.senders
+	t.mu.Unlock()
+
+	target.mu.Lock()
+	target.senders = senders
+	target.mu.Unlock()
+}
+
+func (t *Receiver) String() string {
+	s := t.Codec.String() + ", bytes=" + strconv.Itoa(t.bytes)
+	if t.mu.TryLock() {
+		s += fmt.Sprintf(", senders=%d", len(t.senders))
+		t.mu.Unlock()
+	} else {
+		s += fmt.Sprintf(", senders=?")
+	}
+	return s
+}
+
+func (t *Receiver) MarshalJSON() ([]byte, error) {
+	return json.Marshal(t.String())
+}
+
+type Sender struct {
+	Codec *Codec
+	Media *Media
+
+	Handler HandlerFunc
+
+	receivers []*Receiver
+	mu        sync.Mutex
+	bytes     int
+
+	overflow int
+}
+
+func NewSender(media *Media, codec *Codec) *Sender {
+	return &Sender{Codec: codec, Media: media}
+}
+
+// HandlerFunc like http.HandlerFunc
+type HandlerFunc func(packet *rtp.Packet)
+
+func (s *Sender) HandleRTP(track *Receiver) {
+	bufferSize := 100
+
+	if GetKind(track.Codec.Name) == KindVideo {
+		if track.Codec.IsRTP() {
+			// H.264 2560x1440 4096kbs can have 700+ packets between 25 frames
+			// H.265 5120x1440 can have 700+ packets between two keyframes
+			bufferSize = 1000
+		} else {
+			bufferSize = 50
+		}
+	}
+
+	buffer := make(chan *rtp.Packet, bufferSize)
+
+	track.mu.Lock()
+	if track.senders == nil {
+		track.senders = map[*Sender]chan *rtp.Packet{}
+	}
+	track.senders[s] = buffer
+	track.mu.Unlock()
+
+	s.mu.Lock()
+	s.receivers = append(s.receivers, track)
+	s.mu.Unlock()
+
+	go func() {
+		// read packets from buffer channel until it will be closed
+		for packet := range buffer {
+			s.bytes += len(packet.Payload)
+			s.Handler(packet)
+		}
+
+		// remove current receiver from list
+		// it can only happen when receiver close buffer channel
+		s.mu.Lock()
+		for i, receiver := range s.receivers {
+			if receiver == track {
+				s.receivers = append(s.receivers[:i], s.receivers[i+1:]...)
+				break
+			}
+		}
+		s.mu.Unlock()
+	}()
+}
+
+func (s *Sender) Close() {
+	s.mu.Lock()
+	// remove this sender from all receivers list
+	for _, receiver := range s.receivers {
+		receiver.mu.Lock()
+		if buffer := receiver.senders[s]; buffer != nil {
+			// remove channel from list
+			delete(receiver.senders, s)
+			// close channel
+			close(buffer)
+		}
+		receiver.mu.Unlock()
+	}
+	s.receivers = nil
+	s.mu.Unlock()
+}
+
+func (s *Sender) String() string {
+	info := s.Codec.String() + ", bytes=" + strconv.Itoa(s.bytes)
+	if s.mu.TryLock() {
+		info += ", receivers=" + strconv.Itoa(len(s.receivers))
+		s.mu.Unlock()
+	} else {
+		info += ", receivers=?"
+	}
+	if s.overflow > 0 {
+		info += ", overflow=" + strconv.Itoa(s.overflow)
+	}
+	return info
+}
+
+func (s *Sender) MarshalJSON() ([]byte, error) {
+	return json.Marshal(s.String())
+}

pkg/dvrip/client.go

@@ -8,9 +8,9 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
 	"io"
 	"net"
@@ -19,7 +19,7 @@ import (
 )
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
 	uri     string
 	conn    net.Conn
@@ -28,14 +28,17 @@ type Client struct {
 	seq     uint32
 	stream  string
 
-	medias     []*streamer.Media
-	videoTrack *streamer.Track
-	audioTrack *streamer.Track
+	medias     []*core.Media
+	receivers  []*core.Receiver
+	videoTrack *core.Receiver
+	audioTrack *core.Receiver
 
 	videoTS  uint32
 	videoDT  uint32
 	audioTS  uint32
 	audioSeq uint16
+
+	recv uint32
 }
 
 type Response map[string]any
@@ -196,7 +199,7 @@ func (c *Client) Handle() error {
 
 				//log.Printf("[AVC] %v, len: %d, ts: %10d", h265.Types(payload), len(payload), packet.Timestamp)
 
-				_ = c.videoTrack.WriteRTP(packet)
+				c.videoTrack.WriteRTP(packet)
 			}
 
 		case 0x1FD: // PFrame
@@ -210,7 +213,7 @@ func (c *Client) Handle() error {
 
 				//log.Printf("[DVR] %v, len: %d, ts: %10d", h265.Types(packet.Payload), len(packet.Payload), packet.Timestamp)
 
-				_ = c.videoTrack.WriteRTP(packet)
+				c.videoTrack.WriteRTP(packet)
 			}
 
 		case 0x1FA, 0x1F9: // audio
@@ -245,7 +248,7 @@ func (c *Client) Handle() error {
 
 					//log.Printf("[DVR] len: %d, ts: %10d", len(packet.Payload), packet.Timestamp)
 
-					_ = c.audioTrack.WriteRTP(packet)
+					c.audioTrack.WriteRTP(packet)
 				}
 			}
 		}
@@ -295,6 +298,8 @@ func (c *Client) Response() (b []byte, err error) {
 		return
 	}
 
+	c.recv += 20
+
 	if b[0] != 255 {
 		return nil, errors.New("read error")
 	}
@@ -307,6 +312,8 @@ func (c *Client) Response() (b []byte, err error) {
 		return
 	}
 
+	c.recv += size
+
 	return
 }
 
@@ -328,21 +335,21 @@ func (c *Client) ResponseJSON() (res Response, err error) {
 }
 
 func (c *Client) AddVideoTrack(mediaCode byte, payload []byte) {
-	var codec *streamer.Codec
+	var codec *core.Codec
 	switch mediaCode {
 	case 2:
-		codec = &streamer.Codec{
-			Name:        streamer.CodecH264,
+		codec = &core.Codec{
+			Name:        core.CodecH264,
 			ClockRate:   90000,
-			PayloadType: streamer.PayloadTypeRAW,
+			PayloadType: core.PayloadTypeRAW,
 			FmtpLine:    h264.GetFmtpLine(payload),
 		}
 
 	case 0x03, 0x13:
-		codec = &streamer.Codec{
-			Name:        streamer.CodecH265,
+		codec = &core.Codec{
+			Name:        core.CodecH265,
 			ClockRate:   90000,
-			PayloadType: streamer.PayloadTypeRAW,
+			PayloadType: core.PayloadTypeRAW,
 			FmtpLine:    "profile-id=1",
 		}
 
@@ -369,14 +376,15 @@ func (c *Client) AddVideoTrack(mediaCode byte, payload []byte) {
 		return
 	}
 
-	media := &streamer.Media{
-		Kind:      streamer.KindVideo,
-		Direction: streamer.DirectionSendonly,
-		Codecs:    []*streamer.Codec{codec},
+	media := &core.Media{
+		Kind:      core.KindVideo,
+		Direction: core.DirectionRecvonly,
+		Codecs:    []*core.Codec{codec},
 	}
 	c.medias = append(c.medias, media)
 
-	c.videoTrack = streamer.NewTrack(media, codec)
+	c.videoTrack = core.NewReceiver(media, codec)
+	c.receivers = append(c.receivers, c.videoTrack)
 }
 
 var sampleRates = []uint32{4000, 8000, 11025, 16000, 20000, 22050, 32000, 44100, 48000}
@@ -384,15 +392,15 @@ var sampleRates = []uint32{4000, 8000, 11025, 16000, 20000, 22050, 32000, 44100,
 func (c *Client) AddAudioTrack(mediaCode byte, sampleRate byte) {
 	// https://github.com/vigoss30611/buildroot-ltc/blob/master/system/qm/ipc/ProtocolService/src/ZhiNuo/inc/zn_dh_base_type.h
 	// PCM8 = 7, G729, IMA_ADPCM, G711U, G721, PCM8_VWIS, MS_ADPCM, G711A, PCM16
-	var codec *streamer.Codec
+	var codec *core.Codec
 	switch mediaCode {
 	case 10: // G711U
-		codec = &streamer.Codec{
-			Name: streamer.CodecPCMU,
+		codec = &core.Codec{
+			Name: core.CodecPCMU,
 		}
 	case 14: // G711A
-		codec = &streamer.Codec{
-			Name: streamer.CodecPCMA,
+		codec = &core.Codec{
+			Name: core.CodecPCMA,
 		}
 	default:
 		println("[DVRIP] unsupported audio codec:", mediaCode)
@@ -403,14 +411,15 @@ func (c *Client) AddAudioTrack(mediaCode byte, sampleRate byte) {
 		codec.ClockRate = sampleRates[sampleRate-1]
 	}
 
-	media := &streamer.Media{
-		Kind:      streamer.KindAudio,
-		Direction: streamer.DirectionSendonly,
-		Codecs:    []*streamer.Codec{codec},
+	media := &core.Media{
+		Kind:      core.KindAudio,
+		Direction: core.DirectionRecvonly,
+		Codecs:    []*core.Codec{codec},
 	}
 	c.medias = append(c.medias, media)
 
-	c.audioTrack = streamer.NewTrack(media, codec)
+	c.audioTrack = core.NewReceiver(media, codec)
+	c.receivers = append(c.receivers, c.audioTrack)
 }
 
 func SofiaHash(password string) string {

pkg/dvrip/producer.go

@@ -1,19 +1,21 @@
 package dvrip
 
-import "github.com/AlexxIT/go2rtc/pkg/streamer"
+import (
+	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+)
 
-func (c *Client) GetMedias() []*streamer.Media {
+func (c *Client) GetMedias() []*core.Media {
 	return c.medias
 }
 
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	if c.videoTrack != nil && c.videoTrack.Codec == codec {
-		return c.videoTrack
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	for _, track := range c.receivers {
+		if track.Codec == codec {
+			return track, nil
+		}
 	}
-	if c.audioTrack != nil && c.audioTrack.Codec == codec {
-		return c.audioTrack
-	}
-	return nil
+	return nil, core.ErrCantGetTrack
 }
 
 func (c *Client) Start() error {
@@ -21,5 +23,19 @@ func (c *Client) Start() error {
 }
 
 func (c *Client) Stop() error {
+	for _, receiver := range c.receivers {
+		receiver.Close()
+	}
 	return c.Close()
 }
+
+func (c *Client) MarshalJSON() ([]byte, error) {
+	info := &core.Info{
+		Type:       "DVRIP active producer",
+		RemoteAddr: c.conn.RemoteAddr().String(),
+		Medias:     c.medias,
+		Receivers:  c.receivers,
+		Recv:       int(c.recv),
+	}
+	return json.Marshal(info)
+}

pkg/h264/avc.go

@@ -3,7 +3,7 @@ package h264
 import (
 	"bytes"
 	"encoding/binary"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtp"
 )
 
@@ -164,17 +164,15 @@ func EncodeAVC(nals ...[]byte) (avc []byte) {
 	return
 }
 
-func RepairAVC(track *streamer.Track) streamer.WrapperFunc {
-	sps, pps := GetParameterSet(track.Codec.FmtpLine)
+func RepairAVC(codec *core.Codec, handler core.HandlerFunc) core.HandlerFunc {
+	sps, pps := GetParameterSet(codec.FmtpLine)
 	ps := EncodeAVC(sps, pps)
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) (err error) {
-			if NALUType(packet.Payload) == NALUTypeIFrame {
-				packet.Payload = Join(ps, packet.Payload)
-			}
-			return push(packet)
+	return func(packet *rtp.Packet) {
+		if NALUType(packet.Payload) == NALUTypeIFrame {
+			packet.Payload = Join(ps, packet.Payload)
 		}
+		handler(packet)
 	}
 }
 

pkg/h264/helper.go

@@ -5,7 +5,7 @@ import (
 	"encoding/binary"
 	"encoding/hex"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"strings"
 )
 
@@ -62,11 +62,11 @@ func GetProfileLevelID(fmtp string) string {
 		var conf []byte
 		// some cameras has wrong profile-level-id
 		// https://github.com/AlexxIT/go2rtc/issues/155
-		if s := streamer.Between(fmtp, "sprop-parameter-sets=", ","); s != "" {
+		if s := core.Between(fmtp, "sprop-parameter-sets=", ","); s != "" {
 			if sps, _ := base64.StdEncoding.DecodeString(s); len(sps) >= 4 {
 				conf = sps[1:4]
 			}
-		} else if s = streamer.Between(fmtp, "profile-level-id=", ";"); s != "" {
+		} else if s = core.Between(fmtp, "profile-level-id=", ";"); s != "" {
 			conf, _ = hex.DecodeString(s)
 		}
 
@@ -89,7 +89,7 @@ func GetParameterSet(fmtp string) (sps, pps []byte) {
 		return
 	}
 
-	s := streamer.Between(fmtp, "sprop-parameter-sets=", ";")
+	s := core.Between(fmtp, "sprop-parameter-sets=", ";")
 	if s == "" {
 		return
 	}

pkg/h264/rtp.go

@@ -2,7 +2,7 @@ package h264
 
 import (
 	"encoding/binary"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtp"
 	"github.com/pion/rtp/codecs"
 )
@@ -11,119 +11,112 @@ const RTPPacketVersionAVC = 0
 
 const PSMaxSize = 128 // the biggest SPS I've seen is 48 (EZVIZ CS-CV210)
 
-func RTPDepay(track *streamer.Track) streamer.WrapperFunc {
+func RTPDepay(codec *core.Codec, handler core.HandlerFunc) core.HandlerFunc {
 	depack := &codecs.H264Packet{IsAVC: true}
 
-	sps, pps := GetParameterSet(track.Codec.FmtpLine)
+	sps, pps := GetParameterSet(codec.FmtpLine)
 	ps := EncodeAVC(sps, pps)
 
 	buf := make([]byte, 0, 512*1024) // 512K
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			//log.Printf("[RTP] codec: %s, nalu: %2d, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, %v", track.Codec.Name, packet.Payload[0]&0x1F, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
+	return func(packet *rtp.Packet) {
+		//log.Printf("[RTP] codec: %s, nalu: %2d, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, %v", track.Codec.Name, packet.Payload[0]&0x1F, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
 
-			payload, err := depack.Unmarshal(packet.Payload)
-			if len(payload) == 0 || err != nil {
-				return nil
-			}
-
-			// Fix TP-Link Tapo TC70: sends SPS and PPS with packet.Marker = true
-			// Reolink Duo 2: sends SPS with Marker and PPS without
-			if packet.Marker && len(payload) < PSMaxSize {
-				switch NALUType(payload) {
-				case NALUTypeSPS, NALUTypePPS:
-					buf = append(buf, payload...)
-					return nil
-				case NALUTypeSEI:
-					// RtspServer https://github.com/AlexxIT/go2rtc/issues/244
-					// sends, marked SPS, marked PPS, marked SEI, marked IFrame
-					return nil
-				}
-			}
-
-			if len(buf) == 0 {
-				for {
-					// Amcrest IP4M-1051: 9, 7, 8, 6, 28...
-					// Amcrest IP4M-1051: 9, 6, 1
-					switch NALUType(payload) {
-					case NALUTypeIFrame:
-						// fix IFrame without SPS,PPS
-						buf = append(buf, ps...)
-					case NALUTypeSEI, NALUTypeAUD:
-						// fix ffmpeg with transcoding first frame
-						i := int(4 + binary.BigEndian.Uint32(payload))
-
-						// check if only one NAL (fix ffmpeg transcoding for Reolink RLC-510A)
-						if i == len(payload) {
-							return nil
-						}
-
-						payload = payload[i:]
-						continue
-					}
-					break
-				}
-			}
-
-			// collect all NALs for Access Unit
-			if !packet.Marker {
-				buf = append(buf, payload...)
-				return nil
-			}
-
-			if len(buf) > 0 {
-				payload = append(buf, payload...)
-				buf = buf[:0]
-			}
-
-			// should not be that huge SPS
-			if NALUType(payload) == NALUTypeSPS && binary.BigEndian.Uint32(payload) >= PSMaxSize {
-				// some Chinese buggy cameras has single packet with SPS+PPS+IFrame separated by 00 00 00 01
-				// https://github.com/AlexxIT/WebRTC/issues/391
-				// https://github.com/AlexxIT/WebRTC/issues/392
-				AnnexB2AVC(payload)
-			}
-
-			//log.Printf("[AVC] %v, len: %d, ts: %10d, seq: %d", Types(payload), len(payload), packet.Timestamp, packet.SequenceNumber)
-
-			clone := *packet
-			clone.Version = RTPPacketVersionAVC
-			clone.Payload = payload
-			return push(&clone)
+		payload, err := depack.Unmarshal(packet.Payload)
+		if len(payload) == 0 || err != nil {
+			return
 		}
+
+		// Fix TP-Link Tapo TC70: sends SPS and PPS with packet.Marker = true
+		// Reolink Duo 2: sends SPS with Marker and PPS without
+		if packet.Marker && len(payload) < PSMaxSize {
+			switch NALUType(payload) {
+			case NALUTypeSPS, NALUTypePPS:
+				buf = append(buf, payload...)
+				return
+			case NALUTypeSEI:
+				// RtspServer https://github.com/AlexxIT/go2rtc/issues/244
+				// sends, marked SPS, marked PPS, marked SEI, marked IFrame
+				return
+			}
+		}
+
+		if len(buf) == 0 {
+			for {
+				// Amcrest IP4M-1051: 9, 7, 8, 6, 28...
+				// Amcrest IP4M-1051: 9, 6, 1
+				switch NALUType(payload) {
+				case NALUTypeIFrame:
+					// fix IFrame without SPS,PPS
+					buf = append(buf, ps...)
+				case NALUTypeSEI, NALUTypeAUD:
+					// fix ffmpeg with transcoding first frame
+					i := int(4 + binary.BigEndian.Uint32(payload))
+
+					// check if only one NAL (fix ffmpeg transcoding for Reolink RLC-510A)
+					if i == len(payload) {
+						return
+					}
+
+					payload = payload[i:]
+					continue
+				}
+				break
+			}
+		}
+
+		// collect all NALs for Access Unit
+		if !packet.Marker {
+			buf = append(buf, payload...)
+			return
+		}
+
+		if len(buf) > 0 {
+			payload = append(buf, payload...)
+			buf = buf[:0]
+		}
+
+		// should not be that huge SPS
+		if NALUType(payload) == NALUTypeSPS && binary.BigEndian.Uint32(payload) >= PSMaxSize {
+			// some Chinese buggy cameras has single packet with SPS+PPS+IFrame separated by 00 00 00 01
+			// https://github.com/AlexxIT/WebRTC/issues/391
+			// https://github.com/AlexxIT/WebRTC/issues/392
+			AnnexB2AVC(payload)
+		}
+
+		//log.Printf("[AVC] %v, len: %d, ts: %10d, seq: %d", Types(payload), len(payload), packet.Timestamp, packet.SequenceNumber)
+
+		clone := *packet
+		clone.Version = RTPPacketVersionAVC
+		clone.Payload = payload
+		handler(&clone)
 	}
 }
 
-func RTPPay(mtu uint16) streamer.WrapperFunc {
+func RTPPay(mtu uint16, handler core.HandlerFunc) core.HandlerFunc {
 	payloader := &Payloader{IsAVC: true}
 	sequencer := rtp.NewRandomSequencer()
 	mtu -= 12 // rtp.Header size
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			if packet.Version != RTPPacketVersionAVC {
-				return push(packet)
-			}
+	return func(packet *rtp.Packet) {
+		if packet.Version != RTPPacketVersionAVC {
+			handler(packet)
+			return
+		}
 
-			payloads := payloader.Payload(mtu, packet.Payload)
-			last := len(payloads) - 1
-			for i, payload := range payloads {
-				clone := rtp.Packet{
-					Header: rtp.Header{
-						Version:        2,
-						Marker:         i == last,
-						SequenceNumber: sequencer.NextSequenceNumber(),
-						Timestamp:      packet.Timestamp,
-					},
-					Payload: payload,
-				}
-				if err := push(&clone); err != nil {
-					return err
-				}
+		payloads := payloader.Payload(mtu, packet.Payload)
+		last := len(payloads) - 1
+		for i, payload := range payloads {
+			clone := rtp.Packet{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         i == last,
+					SequenceNumber: sequencer.NextSequenceNumber(),
+					Timestamp:      packet.Timestamp,
+				},
+				Payload: payload,
 			}
-
-			return nil
+			handler(&clone)
 		}
 	}
 }

pkg/h265/helper.go

@@ -3,7 +3,7 @@ package h265
 import (
 	"encoding/base64"
 	"encoding/binary"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
 const (
@@ -62,13 +62,13 @@ func GetParameterSet(fmtp string) (vps, sps, pps []byte) {
 		return
 	}
 
-	s := streamer.Between(fmtp, "sprop-vps=", ";")
+	s := core.Between(fmtp, "sprop-vps=", ";")
 	vps, _ = base64.StdEncoding.DecodeString(s)
 
-	s = streamer.Between(fmtp, "sprop-sps=", ";")
+	s = core.Between(fmtp, "sprop-sps=", ";")
 	sps, _ = base64.StdEncoding.DecodeString(s)
 
-	s = streamer.Between(fmtp, "sprop-pps=", ";")
+	s = core.Between(fmtp, "sprop-pps=", ";")
 	pps, _ = base64.StdEncoding.DecodeString(s)
 
 	return

pkg/h265/rtp.go

@@ -2,189 +2,177 @@ package h265
 
 import (
 	"encoding/binary"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
 )
 
-func RTPDepay(track *streamer.Track) streamer.WrapperFunc {
-	//vps, sps, pps := GetParameterSet(track.Codec.FmtpLine)
+func RTPDepay(codec *core.Codec, handler core.HandlerFunc) core.HandlerFunc {
+	//vps, sps, pps := GetParameterSet(codec.FmtpLine)
 	//ps := h264.EncodeAVC(vps, sps, pps)
 
 	buf := make([]byte, 0, 512*1024) // 512K
 	var nuStart int
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			data := packet.Payload
-			nuType := (data[0] >> 1) & 0x3F
-			//log.Printf("[RTP] codec: %s, nalu: %2d, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, %v", track.Codec.Name, nuType, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
+	return func(packet *rtp.Packet) {
+		data := packet.Payload
+		nuType := (data[0] >> 1) & 0x3F
+		//log.Printf("[RTP] codec: %s, nalu: %2d, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, %v", track.Codec.Name, nuType, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
 
-			// Fix for RtspServer https://github.com/AlexxIT/go2rtc/issues/244
-			if packet.Marker && len(data) < h264.PSMaxSize {
-				switch nuType {
-				case NALUTypeVPS, NALUTypeSPS, NALUTypePPS:
-					packet.Marker = false
-				case NALUTypePrefixSEI, NALUTypeSuffixSEI:
-					return nil
-				}
+		// Fix for RtspServer https://github.com/AlexxIT/go2rtc/issues/244
+		if packet.Marker && len(data) < h264.PSMaxSize {
+			switch nuType {
+			case NALUTypeVPS, NALUTypeSPS, NALUTypePPS:
+				packet.Marker = false
+			case NALUTypePrefixSEI, NALUTypeSuffixSEI:
+				return
 			}
+		}
 
-			if nuType == NALUTypeFU {
-				switch data[2] >> 6 {
-				case 2: // begin
-					nuType = data[2] & 0x3F
+		if nuType == NALUTypeFU {
+			switch data[2] >> 6 {
+			case 2: // begin
+				nuType = data[2] & 0x3F
 
-					// push PS data before keyframe
-					//if len(buf) == 0 && nuType >= 19 && nuType <= 21 {
-					//	buf = append(buf, ps...)
-					//}
+				// push PS data before keyframe
+				//if len(buf) == 0 && nuType >= 19 && nuType <= 21 {
+				//	buf = append(buf, ps...)
+				//}
 
-					nuStart = len(buf)
-					buf = append(buf, 0, 0, 0, 0) // NAL unit size
-					buf = append(buf, (data[0]&0x81)|(nuType<<1), data[1])
-					buf = append(buf, data[3:]...)
-					return nil
-				case 0: // continue
-					buf = append(buf, data[3:]...)
-					return nil
-				case 1: // end
-					buf = append(buf, data[3:]...)
-					binary.BigEndian.PutUint32(buf[nuStart:], uint32(len(buf)-nuStart-4))
-				}
-			} else {
 				nuStart = len(buf)
 				buf = append(buf, 0, 0, 0, 0) // NAL unit size
-				buf = append(buf, data...)
-				binary.BigEndian.PutUint32(buf[nuStart:], uint32(len(data)))
+				buf = append(buf, (data[0]&0x81)|(nuType<<1), data[1])
+				buf = append(buf, data[3:]...)
+				return
+			case 0: // continue
+				buf = append(buf, data[3:]...)
+				return
+			case 1: // end
+				buf = append(buf, data[3:]...)
+				binary.BigEndian.PutUint32(buf[nuStart:], uint32(len(buf)-nuStart-4))
 			}
-
-			// collect all NAL Units for Access Unit
-			if !packet.Marker {
-				return nil
-			}
-
-			//log.Printf("[HEVC] %v, len: %d", Types(buf), len(buf))
-
-			clone := *packet
-			clone.Version = h264.RTPPacketVersionAVC
-			clone.Payload = buf
-
-			buf = buf[:0]
-
-			return push(&clone)
+		} else {
+			nuStart = len(buf)
+			buf = append(buf, 0, 0, 0, 0) // NAL unit size
+			buf = append(buf, data...)
+			binary.BigEndian.PutUint32(buf[nuStart:], uint32(len(data)))
 		}
+
+		// collect all NAL Units for Access Unit
+		if !packet.Marker {
+			return
+		}
+
+		//log.Printf("[HEVC] %v, len: %d", Types(buf), len(buf))
+
+		clone := *packet
+		clone.Version = h264.RTPPacketVersionAVC
+		clone.Payload = buf
+
+		buf = buf[:0]
+
+		handler(&clone)
 	}
 }
 
-func RTPPay(mtu uint16) streamer.WrapperFunc {
+func RTPPay(mtu uint16, handler core.HandlerFunc) core.HandlerFunc {
 	payloader := &Payloader{}
 	sequencer := rtp.NewRandomSequencer()
 	mtu -= 12 // rtp.Header size
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			if packet.Version != h264.RTPPacketVersionAVC {
-				return push(packet)
-			}
+	return func(packet *rtp.Packet) {
+		if packet.Version != h264.RTPPacketVersionAVC {
+			handler(packet)
+			return
+		}
 
-			payloads := payloader.Payload(mtu, packet.Payload)
-			last := len(payloads) - 1
-			for i, payload := range payloads {
-				clone := rtp.Packet{
-					Header: rtp.Header{
-						Version:        2,
-						Marker:         i == last,
-						SequenceNumber: sequencer.NextSequenceNumber(),
-						Timestamp:      packet.Timestamp,
-					},
-					Payload: payload,
-				}
-				if err := push(&clone); err != nil {
-					return err
-				}
+		payloads := payloader.Payload(mtu, packet.Payload)
+		last := len(payloads) - 1
+		for i, payload := range payloads {
+			clone := rtp.Packet{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         i == last,
+					SequenceNumber: sequencer.NextSequenceNumber(),
+					Timestamp:      packet.Timestamp,
+				},
+				Payload: payload,
 			}
-
-			return nil
+			handler(&clone)
 		}
 	}
 }
 
 // SafariPay - generate Safari friendly payload for H265
 // https://github.com/AlexxIT/Blog/issues/5
-func SafariPay(mtu uint16) streamer.WrapperFunc {
+func SafariPay(mtu uint16, handler core.HandlerFunc) core.HandlerFunc {
 	sequencer := rtp.NewRandomSequencer()
 	size := int(mtu - 12) // rtp.Header size
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			if packet.Version != h264.RTPPacketVersionAVC {
-				return push(packet)
+	return func(packet *rtp.Packet) {
+		if packet.Version != h264.RTPPacketVersionAVC {
+			handler(packet)
+			return
+		}
+
+		// protect original packets from modification
+		au := make([]byte, len(packet.Payload))
+		copy(au, packet.Payload)
+
+		var start byte
+
+		for i := 0; i < len(au); {
+			size := int(binary.BigEndian.Uint32(au[i:])) + 4
+
+			// convert AVC to Annex-B
+			au[i] = 0
+			au[i+1] = 0
+			au[i+2] = 0
+			au[i+3] = 1
+
+			switch NALUType(au[i:]) {
+			case NALUTypeIFrame, NALUTypeIFrame2, NALUTypeIFrame3:
+				start = 3
+			default:
+				if start == 0 {
+					start = 2
+				}
 			}
 
-			// protect original packets from modification
-			au := make([]byte, len(packet.Payload))
-			copy(au, packet.Payload)
+			i += size
+		}
 
-			var start byte
+		// rtp.Packet payload
+		b := make([]byte, 1, size)
+		size-- // minus header byte
 
-			for i := 0; i < len(au); {
-				size := int(binary.BigEndian.Uint32(au[i:])) + 4
+		for au != nil {
+			b[0] = start
 
-				// convert AVC to Annex-B
-				au[i] = 0
-				au[i+1] = 0
-				au[i+2] = 0
-				au[i+3] = 1
-
-				switch NALUType(au[i:]) {
-				case NALUTypeIFrame, NALUTypeIFrame2, NALUTypeIFrame3:
-					start = 3
-				default:
-					if start == 0 {
-						start = 2
-					}
-				}
-
-				i += size
+			if start > 1 {
+				start -= 2
 			}
 
-			// rtp.Packet payload
-			b := make([]byte, 1, size)
-			size-- // minus header byte
-
-			for au != nil {
-				b[0] = start
-
-				if start > 1 {
-					start -= 2
-				}
-
-				if len(au) > size {
-					b = append(b, au[:size]...)
-					au = au[size:]
-				} else {
-					b = append(b, au...)
-					au = nil
-				}
-
-				clone := rtp.Packet{
-					Header: rtp.Header{
-						Version:        2,
-						Marker:         au == nil,
-						SequenceNumber: sequencer.NextSequenceNumber(),
-						Timestamp:      packet.Timestamp,
-					},
-					Payload: b,
-				}
-				if err := push(&clone); err != nil {
-					return err
-				}
-
-				b = b[:1] // clear buffer
+			if len(au) > size {
+				b = append(b, au[:size]...)
+				au = au[size:]
+			} else {
+				b = append(b, au...)
+				au = nil
 			}
 
-			return nil
+			clone := rtp.Packet{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         au == nil,
+					SequenceNumber: sequencer.NextSequenceNumber(),
+					Timestamp:      packet.Timestamp,
+				},
+				Payload: b,
+			}
+			handler(&clone)
+
+			b = b[:1] // clear buffer
 		}
 	}
 }

pkg/hap/character.go

@@ -11,14 +11,14 @@ import (
 )
 
 type Character struct {
-	AID         int         `json:"aid,omitempty"`
-	IID         int         `json:"iid"`
-	Type        string      `json:"type,omitempty"`
-	Format      string      `json:"format,omitempty"`
-	Value       interface{} `json:"value,omitempty"`
-	Event       interface{} `json:"ev,omitempty"`
-	Perms       []string    `json:"perms,omitempty"`
-	Description string      `json:"description,omitempty"`
+	AID         int      `json:"aid,omitempty"`
+	IID         int      `json:"iid"`
+	Type        string   `json:"type,omitempty"`
+	Format      string   `json:"format,omitempty"`
+	Value       any      `json:"value,omitempty"`
+	Event       any      `json:"ev,omitempty"`
+	Perms       []string `json:"perms,omitempty"`
+	Description string   `json:"description,omitempty"`
 	//MaxDataLen int      `json:"maxDataLen"`
 
 	listeners map[io.Writer]bool

pkg/hap/conn.go

@@ -7,8 +7,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/hap/mdns"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/brutella/hap"
 	"github.com/brutella/hap/chacha20poly1305"
 	"github.com/brutella/hap/curve25519"
@@ -26,7 +26,7 @@ import (
 
 // Conn for HomeKit. DevicePublic can be null.
 type Conn struct {
-	streamer.Element
+	core.Listener
 
 	DeviceAddress string // including port
 	DeviceID      string

pkg/homekit/client.go

@@ -4,10 +4,10 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/hap"
 	"github.com/AlexxIT/go2rtc/pkg/hap/camera"
 	"github.com/AlexxIT/go2rtc/pkg/srtp"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/brutella/hap/characteristic"
 	"github.com/brutella/hap/rtp"
 	"net"
@@ -16,15 +16,15 @@ import (
 )
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
 	conn   *hap.Conn
 	exit   chan error
 	server *srtp.Server
 	url    string
 
-	medias []*streamer.Media
-	tracks []*streamer.Track
+	medias    []*core.Media
+	receivers []*core.Receiver
 
 	sessions []*srtp.Session
 }
@@ -62,7 +62,7 @@ func (c *Client) Dial() error {
 	return nil
 }
 
-func (c *Client) GetMedias() []*streamer.Media {
+func (c *Client) GetMedias() []*core.Media {
 	if c.medias == nil {
 		c.medias = c.getMedias()
 	}
@@ -70,20 +70,20 @@ func (c *Client) GetMedias() []*streamer.Media {
 	return c.medias
 }
 
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	for _, track := range c.tracks {
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	for _, track := range c.receivers {
 		if track.Codec == codec {
-			return track
+			return track, nil
 		}
 	}
 
-	track := streamer.NewTrack(media, codec)
-	c.tracks = append(c.tracks, track)
-	return track
+	track := core.NewReceiver(media, codec)
+	c.receivers = append(c.receivers, track)
+	return track, nil
 }
 
 func (c *Client) Start() error {
-	if c.tracks == nil {
+	if c.receivers == nil {
 		return errors.New("producer without tracks")
 	}
 
@@ -161,11 +161,11 @@ func (c *Client) Start() error {
 		return err
 	}
 
-	for _, track := range c.tracks {
+	for _, track := range c.receivers {
 		switch track.Codec.Name {
-		case streamer.CodecH264:
+		case core.CodecH264:
 			vs.Track = track
-		case streamer.CodecELD:
+		case core.CodecELD:
 			as.Track = track
 		}
 	}
@@ -188,8 +188,8 @@ func (c *Client) Stop() error {
 	return err
 }
 
-func (c *Client) getMedias() []*streamer.Media {
-	var medias []*streamer.Media
+func (c *Client) getMedias() []*core.Media {
+	var medias []*core.Media
 
 	accs, err := c.conn.GetAccessories()
 	if err != nil {
@@ -206,20 +206,20 @@ func (c *Client) getMedias() []*streamer.Media {
 	}
 
 	for _, hkCodec := range v1.Codecs {
-		codec := &streamer.Codec{ClockRate: 90000}
+		codec := &core.Codec{ClockRate: 90000}
 
 		switch hkCodec.Type {
 		case rtp.VideoCodecType_H264:
-			codec.Name = streamer.CodecH264
+			codec.Name = core.CodecH264
 			codec.FmtpLine = "profile-level-id=420029"
 		default:
 			fmt.Printf("unknown codec: %d", hkCodec.Type)
 			continue
 		}
 
-		media := &streamer.Media{
-			Kind: streamer.KindVideo, Direction: streamer.DirectionSendonly,
-			Codecs: []*streamer.Codec{codec},
+		media := &core.Media{
+			Kind: core.KindVideo, Direction: core.DirectionRecvonly,
+			Codecs: []*core.Codec{codec},
 		}
 		medias = append(medias, media)
 	}
@@ -231,7 +231,7 @@ func (c *Client) getMedias() []*streamer.Media {
 	}
 
 	for _, hkCodec := range v2.Codecs {
-		codec := &streamer.Codec{
+		codec := &core.Codec{
 			Channels: uint16(hkCodec.Parameters.Channels),
 		}
 
@@ -248,7 +248,7 @@ func (c *Client) getMedias() []*streamer.Media {
 
 		switch hkCodec.Type {
 		case rtp.AudioCodecType_AAC_ELD:
-			codec.Name = streamer.CodecELD
+			codec.Name = core.CodecELD
 			// only this value supported by FFmpeg
 			codec.FmtpLine = "profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=F8EC3000"
 		default:
@@ -256,9 +256,9 @@ func (c *Client) getMedias() []*streamer.Media {
 			continue
 		}
 
-		media := &streamer.Media{
-			Kind: streamer.KindAudio, Direction: streamer.DirectionSendonly,
-			Codecs: []*streamer.Codec{codec},
+		media := &core.Media{
+			Kind: core.KindAudio, Direction: core.DirectionRecvonly,
+			Codecs: []*core.Codec{codec},
 		}
 		medias = append(medias, media)
 	}
@@ -272,12 +272,12 @@ func (c *Client) MarshalJSON() ([]byte, error) {
 		recv += atomic.LoadUint32(&session.Recv)
 	}
 
-	info := &streamer.Info{
-		Type:   "HomeKit source",
-		URL:    c.conn.URL(),
-		Medias: c.medias,
-		Tracks: c.tracks,
-		Recv:   recv,
+	info := &core.Info{
+		Type:      "HomeKit active producer",
+		URL:       c.conn.URL(),
+		Medias:    c.medias,
+		Receivers: c.receivers,
+		Recv:      int(recv),
 	}
 	return json.Marshal(info)
 }

pkg/isapi/client.go

@@ -2,7 +2,7 @@ package isapi
 
 import (
 	"errors"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"io"
 	"net"
@@ -11,16 +11,15 @@ import (
 )
 
 type Client struct {
-	streamer.Element
-
-	url string
-
-	medias []*streamer.Media
-	tracks []*streamer.Track
+	core.Listener
 
+	url     string
 	channel string
 	conn    net.Conn
-	send    int
+
+	medias []*core.Media
+	sender *core.Sender
+	send   int
 }
 
 func NewClient(rawURL string) (*Client, error) {
@@ -60,22 +59,22 @@ func (c *Client) Dial() (err error) {
 
 	xml := string(b)
 
-	codec := streamer.Between(xml, `<audioCompressionType>`, `<`)
+	codec := core.Between(xml, `<audioCompressionType>`, `<`)
 	switch codec {
 	case "G.711ulaw":
-		codec = streamer.CodecPCMU
+		codec = core.CodecPCMU
 	case "G.711alaw":
-		codec = streamer.CodecPCMA
+		codec = core.CodecPCMA
 	default:
 		return nil
 	}
 
-	c.channel = streamer.Between(xml, `<id>`, `<`)
+	c.channel = core.Between(xml, `<id>`, `<`)
 
-	media := &streamer.Media{
-		Kind:      streamer.KindAudio,
-		Direction: streamer.DirectionRecvonly,
-		Codecs: []*streamer.Codec{
+	media := &core.Media{
+		Kind:      core.KindAudio,
+		Direction: core.DirectionSendonly,
+		Codecs: []*core.Codec{
 			{Name: codec, ClockRate: 8000},
 		},
 	}

pkg/isapi/consumer.go

@@ -1,18 +1,63 @@
 package isapi
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtp"
 )
 
-func (c *Client) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	consCodec := media.MatchCodec(track.Codec)
-	consTrack := c.GetTrack(media, consCodec)
-	if consTrack == nil {
-		return nil
+func (c *Client) GetMedias() []*core.Media {
+	return c.medias
+}
+
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	return nil, core.ErrCantGetTrack
+}
+
+func (c *Client) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
+	if c.sender == nil {
+		c.sender = core.NewSender(media, track.Codec)
+		c.sender.Handler = func(packet *rtp.Packet) {
+			if c.conn == nil {
+				return
+			}
+			c.send += len(packet.Payload)
+			_, _ = c.conn.Write(packet.Payload)
+		}
 	}
 
-	return track.Bind(func(packet *rtp.Packet) error {
-		return consTrack.WriteRTP(packet)
-	})
+	c.sender.HandleRTP(track)
+	return nil
+}
+
+func (c *Client) Start() (err error) {
+	if err = c.Open(); err != nil {
+		return
+	}
+	return
+}
+
+func (c *Client) Stop() (err error) {
+	if c.sender != nil {
+		c.sender.Close()
+	}
+
+	if c.conn != nil {
+		_ = c.Close()
+		return c.conn.Close()
+	}
+
+	return nil
+}
+
+func (c *Client) MarshalJSON() ([]byte, error) {
+	info := &core.Info{
+		Type:   "ISAPI active consumer",
+		Medias: c.medias,
+		Send:   c.send,
+	}
+	if c.sender != nil {
+		info.Senders = []*core.Sender{c.sender}
+	}
+	return json.Marshal(info)
 }

pkg/isapi/producer.go

@@ -1,56 +0,0 @@
-package isapi
-
-import (
-	"encoding/json"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
-	"github.com/pion/rtp"
-)
-
-func (c *Client) GetMedias() []*streamer.Media {
-	return c.medias
-}
-
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	for _, track := range c.tracks {
-		if track.Codec == codec {
-			return track
-		}
-	}
-
-	track := streamer.NewTrack(media, codec)
-	track = track.Bind(func(packet *rtp.Packet) (err error) {
-		if c.conn != nil {
-			c.send += len(packet.Payload)
-			_, err = c.conn.Write(packet.Payload)
-		}
-		return
-	})
-	c.tracks = append(c.tracks, track)
-
-	return track
-}
-
-func (c *Client) Start() (err error) {
-	if err = c.Open(); err != nil {
-		return
-	}
-	return
-}
-
-func (c *Client) Stop() (err error) {
-	if c.conn == nil {
-		return
-	}
-	_ = c.Close()
-	return c.conn.Close()
-}
-
-func (c *Client) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
-		Type:   "ISAPI",
-		Medias: c.medias,
-		Tracks: c.tracks,
-		Send:   uint32(c.send),
-	}
-	return json.Marshal(info)
-}

pkg/iso/codecs.go

@@ -1,13 +1,15 @@
 package iso
 
-import "github.com/AlexxIT/go2rtc/pkg/streamer"
+import (
+	"github.com/AlexxIT/go2rtc/pkg/core"
+)
 
 func (m *Movie) WriteVideo(codec string, width, height uint16, conf []byte) {
 	// https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
 	switch codec {
-	case streamer.CodecH264:
+	case core.CodecH264:
 		m.StartAtom("avc1")
-	case streamer.CodecH265:
+	case core.CodecH265:
 		m.StartAtom("hev1")
 	default:
 		panic("unsupported iso video: " + codec)
@@ -30,9 +32,9 @@ func (m *Movie) WriteVideo(codec string, width, height uint16, conf []byte) {
 	m.WriteUint16(0xFFFF) // color table id (-1)
 
 	switch codec {
-	case streamer.CodecH264:
+	case core.CodecH264:
 		m.StartAtom("avcC")
-	case streamer.CodecH265:
+	case core.CodecH265:
 		m.StartAtom("hvcC")
 	}
 	m.Write(conf)
@@ -43,13 +45,13 @@ func (m *Movie) WriteVideo(codec string, width, height uint16, conf []byte) {
 
 func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, conf []byte) {
 	switch codec {
-	case streamer.CodecAAC, streamer.CodecMP3:
+	case core.CodecAAC, core.CodecMP3:
 		m.StartAtom("mp4a")
-	case streamer.CodecOpus:
+	case core.CodecOpus:
 		m.StartAtom("Opus")
-	case streamer.CodecPCMU:
+	case core.CodecPCMU:
 		m.StartAtom("ulaw")
-	case streamer.CodecPCMA:
+	case core.CodecPCMA:
 		m.StartAtom("alaw")
 	default:
 		panic("unsupported iso audio: " + codec)
@@ -66,16 +68,16 @@ func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, con
 	m.WriteFloat32(float64(sampleRate)) // sample_rate
 
 	switch codec {
-	case streamer.CodecAAC:
+	case core.CodecAAC:
 		m.WriteEsdsAAC(conf)
-	case streamer.CodecMP3:
+	case core.CodecMP3:
 		m.WriteEsdsMP3()
-	case streamer.CodecOpus:
+	case core.CodecOpus:
 		// don't know what means this magic
 		m.StartAtom("dOps")
 		m.WriteBytes(0, 0x02, 0x01, 0x38, 0, 0, 0xBB, 0x80, 0, 0, 0)
 		m.EndAtom()
-	case streamer.CodecPCMU, streamer.CodecPCMA:
+	case core.CodecPCMU, core.CodecPCMA:
 		// don't know what means this magic
 		m.StartAtom("chan")
 		m.WriteBytes(0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0)

pkg/ivideon/client.go

@@ -6,7 +6,7 @@ import (
 	"encoding/binary"
 	"encoding/json"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/deepch/vdk/codec/h264parser"
 	"github.com/deepch/vdk/format/fmp4/fmp4io"
 	"github.com/gorilla/websocket"
@@ -15,7 +15,6 @@ import (
 	"net/http"
 	"strings"
 	"sync"
-	"sync/atomic"
 	"time"
 )
 
@@ -28,13 +27,14 @@ const (
 )
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
 	ID string
 
-	conn   *websocket.Conn
-	medias []*streamer.Media
-	tracks map[byte]*streamer.Track
+	conn *websocket.Conn
+
+	medias   []*core.Media
+	receiver *core.Receiver
 
 	msg *message
 	t0  time.Time
@@ -43,7 +43,7 @@ type Client struct {
 	state  State
 	mu     sync.Mutex
 
-	recv uint32
+	recv int
 }
 
 func NewClient(id string) *Client {
@@ -107,12 +107,11 @@ func (c *Client) Handle() error {
 		return err
 	}
 
-	track := c.tracks[c.msg.Track]
-	if track != nil {
+	if c.receiver != nil && c.receiver.ID == c.msg.Track {
 		c.mu.Lock()
 		if c.state == StateHandle {
 			c.buffer <- data
-			atomic.AddUint32(&c.recv, uint32(len(data)))
+			c.recv += len(data)
 		}
 		c.mu.Unlock()
 	}
@@ -139,12 +138,11 @@ func (c *Client) Handle() error {
 				return err
 			}
 
-			track = c.tracks[msg.Track]
-			if track != nil {
+			if c.receiver != nil && c.receiver.ID == msg.Track {
 				c.mu.Lock()
 				if c.state == StateHandle {
 					c.buffer <- data
-					atomic.AddUint32(&c.recv, uint32(len(data)))
+					c.recv += len(data)
 				}
 				c.mu.Unlock()
 			}
@@ -173,8 +171,6 @@ func (c *Client) Close() error {
 }
 
 func (c *Client) getTracks() error {
-	c.tracks = map[byte]*streamer.Track{}
-
 	for {
 		_, data, err := c.conn.ReadMessage()
 		if err != nil {
@@ -197,15 +193,15 @@ func (c *Client) getTracks() error {
 			switch s {
 			case "avc1": // avc1.4d0029
 				// skip multiple identical init
-				if c.tracks[msg.TrackID] != nil {
+				if c.receiver != nil {
 					continue
 				}
 
-				codec := &streamer.Codec{
-					Name:        streamer.CodecH264,
+				codec := &core.Codec{
+					Name:        core.CodecH264,
 					ClockRate:   90000,
 					FmtpLine:    "profile-level-id=" + msg.CodecString[i+1:],
-					PayloadType: streamer.PayloadTypeRAW,
+					PayloadType: core.PayloadTypeRAW,
 				}
 
 				i = bytes.Index(msg.Data, []byte("avcC")) - 4
@@ -225,15 +221,15 @@ func (c *Client) getTracks() error {
 					base64.StdEncoding.EncodeToString(record.SPS[0]) + "," +
 					base64.StdEncoding.EncodeToString(record.PPS[0])
 
-				media := &streamer.Media{
-					Kind:      streamer.KindVideo,
-					Direction: streamer.DirectionSendonly,
-					Codecs:    []*streamer.Codec{codec},
+				media := &core.Media{
+					Kind:      core.KindVideo,
+					Direction: core.DirectionRecvonly,
+					Codecs:    []*core.Codec{codec},
 				}
 				c.medias = append(c.medias, media)
 
-				track := streamer.NewTrack(media, codec)
-				c.tracks[msg.TrackID] = track
+				c.receiver = core.NewReceiver(media, codec)
+				c.receiver.ID = msg.TrackID
 
 			case "mp4a": // mp4a.40.2
 			}
@@ -249,11 +245,6 @@ func (c *Client) getTracks() error {
 }
 
 func (c *Client) worker(buffer chan []byte) {
-	var track *streamer.Track
-	for _, track = range c.tracks {
-		break
-	}
-
 	for data := range buffer {
 		moof := &fmp4io.MovieFrag{}
 		if _, err := moof.Unmarshal(data, 0); err != nil {
@@ -289,7 +280,7 @@ func (c *Client) worker(buffer chan []byte) {
 				Header:  rtp.Header{Timestamp: ts * 90},
 				Payload: data[:entry.Size],
 			}
-			_ = track.WriteRTP(packet)
+			c.receiver.WriteRTP(packet)
 
 			data = data[entry.Size:]
 			ts += entry.Duration

pkg/ivideon/producer.go

@@ -2,22 +2,18 @@ package ivideon
 
 import (
 	"encoding/json"
-	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
-	"sync/atomic"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
-func (c *Client) GetMedias() []*streamer.Media {
+func (c *Client) GetMedias() []*core.Media {
 	return c.medias
 }
 
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	for _, track := range c.tracks {
-		if track.Codec == codec {
-			return track
-		}
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	if c.receiver != nil {
+		return c.receiver, nil
 	}
-	panic(fmt.Sprintf("wrong media/codec: %+v %+v", media, codec))
+	return nil, core.ErrCantGetTrack
 }
 
 func (c *Client) Start() error {
@@ -29,21 +25,21 @@ func (c *Client) Start() error {
 }
 
 func (c *Client) Stop() error {
+	if c.receiver != nil {
+		c.receiver.Close()
+	}
 	return c.Close()
 }
 
 func (c *Client) MarshalJSON() ([]byte, error) {
-	var tracks []*streamer.Track
-	for _, track := range c.tracks {
-		tracks = append(tracks, track)
-	}
-
-	info := &streamer.Info{
-		Type:   "Ivideon source",
+	info := &core.Info{
+		Type:   "Ivideon active producer",
 		URL:    c.ID,
 		Medias: c.medias,
-		Tracks: tracks,
-		Recv:   atomic.LoadUint32(&c.recv),
+		Recv:   c.recv,
+	}
+	if c.receiver != nil {
+		info.Receivers = []*core.Receiver{c.receiver}
 	}
 	return json.Marshal(info)
 }

pkg/mjpeg/client.go

@@ -3,7 +3,7 @@ package mjpeg
 import (
 	"bufio"
 	"errors"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"github.com/pion/rtp"
 	"io"
@@ -11,12 +11,11 @@ import (
 	"net/textproto"
 	"strconv"
 	"strings"
-	"sync/atomic"
 	"time"
 )
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
 	UserAgent  string
 	RemoteAddr string
@@ -24,9 +23,10 @@ type Client struct {
 	closed bool
 	res    *http.Response
 
-	medias []*streamer.Media
-	track  *streamer.Track
-	recv   uint32
+	medias   []*core.Media
+	receiver *core.Receiver
+
+	recv int
 }
 
 func NewClient(res *http.Response) *Client {
@@ -40,9 +40,9 @@ func (c *Client) startJPEG() error {
 	}
 
 	packet := &rtp.Packet{Header: rtp.Header{Timestamp: now()}, Payload: buf}
-	_ = c.track.WriteRTP(packet)
+	c.receiver.WriteRTP(packet)
 
-	atomic.AddUint32(&c.recv, uint32(len(buf)))
+	c.recv += len(buf)
 
 	req := c.res.Request
 
@@ -61,10 +61,12 @@ func (c *Client) startJPEG() error {
 			return err
 		}
 
-		packet = &rtp.Packet{Header: rtp.Header{Timestamp: now()}, Payload: buf}
-		_ = c.track.WriteRTP(packet)
+		if c.receiver != nil {
+			packet = &rtp.Packet{Header: rtp.Header{Timestamp: now()}, Payload: buf}
+			c.receiver.WriteRTP(packet)
+		}
 
-		atomic.AddUint32(&c.recv, uint32(len(buf)))
+		c.recv += len(buf)
 	}
 
 	return nil
@@ -109,10 +111,12 @@ func (c *Client) startMJPEG(boundary string) error {
 			return err
 		}
 
-		packet := &rtp.Packet{Header: rtp.Header{Timestamp: now()}, Payload: buf}
-		_ = c.track.WriteRTP(packet)
+		if c.receiver != nil {
+			packet := &rtp.Packet{Header: rtp.Header{Timestamp: now()}, Payload: buf}
+			c.receiver.WriteRTP(packet)
+		}
 
-		atomic.AddUint32(&c.recv, uint32(len(buf)))
+		c.recv += len(buf)
 
 		if _, err = r.Discard(2); err != nil {
 			return err

pkg/mjpeg/consumer.go

@@ -2,52 +2,71 @@ package mjpeg
 
 import (
 	"encoding/json"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtp"
-	"sync/atomic"
 )
 
 type Consumer struct {
-	streamer.Element
+	core.Listener
 
 	UserAgent  string
 	RemoteAddr string
 
-	codecs []*streamer.Codec
-	start  bool
+	medias []*core.Media
+	sender *core.Sender
 
-	send uint32
+	send int
 }
 
-func (c *Consumer) GetMedias() []*streamer.Media {
-	return []*streamer.Media{{
-		Kind:      streamer.KindVideo,
-		Direction: streamer.DirectionRecvonly,
-		Codecs:    []*streamer.Codec{{Name: streamer.CodecJPEG}},
-	}}
+func (c *Consumer) GetMedias() []*core.Media {
+	if c.medias == nil {
+		c.medias = []*core.Media{
+			{
+				Kind:      core.KindVideo,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecJPEG},
+				},
+			},
+		}
+	}
+	return c.medias
 }
 
-func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	push := func(packet *rtp.Packet) error {
-		c.Fire(packet.Payload)
-		atomic.AddUint32(&c.send, uint32(len(packet.Payload)))
-		return nil
+func (c *Consumer) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
+	if c.sender == nil {
+		c.sender = core.NewSender(media, track.Codec)
+		c.sender.Handler = func(packet *rtp.Packet) {
+			c.Fire(packet.Payload)
+			c.send += len(packet.Payload)
+		}
+
+		if track.Codec.IsRTP() {
+			c.sender.Handler = RTPDepay(c.sender.Handler)
+		}
 	}
 
-	if track.Codec.IsRTP() {
-		wrapper := RTPDepay(track)
-		push = wrapper(push)
-	}
+	c.sender.HandleRTP(track)
+	return nil
+}
 
-	return track.Bind(push)
+func (c *Consumer) Stop() error {
+	if c.sender != nil {
+		c.sender.Close()
+	}
+	return nil
 }
 
 func (c *Consumer) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
-		Type:       "MJPEG client",
+	info := &core.Info{
+		Type:       "MJPEG passive consumer",
 		RemoteAddr: c.RemoteAddr,
 		UserAgent:  c.UserAgent,
-		Send:       atomic.LoadUint32(&c.send),
+		Medias:     c.medias,
+		Send:       c.send,
+	}
+	if c.sender != nil {
+		info.Senders = []*core.Sender{c.sender}
 	}
 	return json.Marshal(info)
 }

pkg/mjpeg/producer.go

@@ -3,19 +3,18 @@ package mjpeg
 import (
 	"encoding/json"
 	"errors"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"strings"
-	"sync/atomic"
 )
 
-func (c *Client) GetMedias() []*streamer.Media {
+func (c *Client) GetMedias() []*core.Media {
 	if c.medias == nil {
-		c.medias = []*streamer.Media{{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionSendonly,
-			Codecs: []*streamer.Codec{
+		c.medias = []*core.Media{{
+			Kind:      core.KindVideo,
+			Direction: core.DirectionRecvonly,
+			Codecs: []*core.Codec{
 				{
-					Name: streamer.CodecJPEG, ClockRate: 90000, PayloadType: streamer.PayloadTypeRAW,
+					Name: core.CodecJPEG, ClockRate: 90000, PayloadType: core.PayloadTypeRAW,
 				},
 			},
 		}}
@@ -23,11 +22,11 @@ func (c *Client) GetMedias() []*streamer.Media {
 	return c.medias
 }
 
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	if c.track == nil {
-		c.track = streamer.NewTrack(media, codec)
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	if c.receiver == nil {
+		c.receiver = core.NewReceiver(media, codec)
 	}
-	return c.track
+	return c.receiver, nil
 }
 
 func (c *Client) Start() error {
@@ -46,6 +45,9 @@ func (c *Client) Start() error {
 }
 
 func (c *Client) Stop() error {
+	if c.receiver != nil {
+		c.receiver.Close()
+	}
 	// important for close reader/writer gorutines
 	_ = c.res.Body.Close()
 	c.closed = true
@@ -53,12 +55,16 @@ func (c *Client) Stop() error {
 }
 
 func (c *Client) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
-		Type:       "MJPEG source",
+	info := &core.Info{
+		Type:       "MJPEG active producer",
 		URL:        c.res.Request.URL.String(),
 		RemoteAddr: c.RemoteAddr,
 		UserAgent:  c.UserAgent,
-		Recv:       atomic.LoadUint32(&c.recv),
+		Medias:     c.medias,
+		Recv:       c.recv,
+	}
+	if c.receiver != nil {
+		info.Receivers = []*core.Receiver{c.receiver}
 	}
 	return json.Marshal(info)
 }

pkg/mjpeg/rtp.go

@@ -3,86 +3,84 @@ package mjpeg
 import (
 	"bytes"
 	"encoding/binary"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtp"
 	"image"
 	"image/jpeg"
 )
 
-func RTPDepay(track *streamer.Track) streamer.WrapperFunc {
+func RTPDepay(handlerFunc core.HandlerFunc) core.HandlerFunc {
 	buf := make([]byte, 0, 512*1024) // 512K
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			//log.Printf("[RTP] codec: %s, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, mark: %v", track.Codec.Name, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
+	return func(packet *rtp.Packet) {
+		//log.Printf("[RTP] codec: %s, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, mark: %v", track.Codec.Name, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
 
-			// https://www.rfc-editor.org/rfc/rfc2435#section-3.1
-			b := packet.Payload
+		// https://www.rfc-editor.org/rfc/rfc2435#section-3.1
+		b := packet.Payload
 
-			// 3.1.  JPEG header
-			t := b[4]
+		// 3.1.  JPEG header
+		t := b[4]
 
-			// 3.1.7.  Restart Marker header
-			if 64 <= t && t <= 127 {
-				b = b[12:] // skip it
-			} else {
-				b = b[8:]
-			}
-
-			if len(buf) == 0 {
-				var lqt, cqt []byte
-
-				// 3.1.8.  Quantization Table header
-				q := packet.Payload[5]
-				if q >= 128 {
-					lqt = b[4:68]
-					cqt = b[68:132]
-					b = b[132:]
-				} else {
-					lqt, cqt = MakeTables(q)
-				}
-
-				// https://www.rfc-editor.org/rfc/rfc2435#section-3.1.5
-				// The maximum width is 2040 pixels.
-				w := uint16(packet.Payload[6]) << 3
-				h := uint16(packet.Payload[7]) << 3
-
-				// fix sizes more than 2040
-				switch {
-				// 512x1920 512x1440
-				case w == cutSize(2560) && (h == 1920 || h == 1440):
-					w = 2560
-				// 1792x112
-				case w == cutSize(3840) && h == cutSize(2160):
-					w = 3840
-					h = 2160
-				// 256x1296
-				case w == cutSize(2304) && h == 1296:
-					w = 2304
-				}
-
-				//fmt.Printf("t: %d, q: %d, w: %d, h: %d\n", t, q, w, h)
-				buf = MakeHeaders(buf, t, w, h, lqt, cqt)
-			}
-
-			// 3.1.9.  JPEG Payload
-			buf = append(buf, b...)
-
-			if !packet.Marker {
-				return nil
-			}
-
-			if end := buf[len(buf)-2:]; end[0] != 0xFF && end[1] != 0xD9 {
-				buf = append(buf, 0xFF, 0xD9)
-			}
-
-			clone := *packet
-			clone.Payload = buf
-
-			buf = buf[:0] // clear buffer
-
-			return push(&clone)
+		// 3.1.7.  Restart Marker header
+		if 64 <= t && t <= 127 {
+			b = b[12:] // skip it
+		} else {
+			b = b[8:]
 		}
+
+		if len(buf) == 0 {
+			var lqt, cqt []byte
+
+			// 3.1.8.  Quantization Table header
+			q := packet.Payload[5]
+			if q >= 128 {
+				lqt = b[4:68]
+				cqt = b[68:132]
+				b = b[132:]
+			} else {
+				lqt, cqt = MakeTables(q)
+			}
+
+			// https://www.rfc-editor.org/rfc/rfc2435#section-3.1.5
+			// The maximum width is 2040 pixels.
+			w := uint16(packet.Payload[6]) << 3
+			h := uint16(packet.Payload[7]) << 3
+
+			// fix sizes more than 2040
+			switch {
+			// 512x1920 512x1440
+			case w == cutSize(2560) && (h == 1920 || h == 1440):
+				w = 2560
+			// 1792x112
+			case w == cutSize(3840) && h == cutSize(2160):
+				w = 3840
+				h = 2160
+			// 256x1296
+			case w == cutSize(2304) && h == 1296:
+				w = 2304
+			}
+
+			//fmt.Printf("t: %d, q: %d, w: %d, h: %d\n", t, q, w, h)
+			buf = MakeHeaders(buf, t, w, h, lqt, cqt)
+		}
+
+		// 3.1.9.  JPEG Payload
+		buf = append(buf, b...)
+
+		if !packet.Marker {
+			return
+		}
+
+		if end := buf[len(buf)-2:]; end[0] != 0xFF && end[1] != 0xD9 {
+			buf = append(buf, 0xFF, 0xD9)
+		}
+
+		clone := *packet
+		clone.Payload = buf
+
+		buf = buf[:0] // clear buffer
+
+		handlerFunc(&clone)
 	}
 }
 
@@ -90,102 +88,96 @@ func cutSize(size uint16) uint16 {
 	return ((size >> 3) & 0xFF) << 3
 }
 
-func RTPPay() streamer.WrapperFunc {
+func RTPPay(handlerFunc core.HandlerFunc) core.HandlerFunc {
 	const packetSize = 1436
 
 	sequencer := rtp.NewRandomSequencer()
 
-	return func(push streamer.WriterFunc) streamer.WriterFunc {
-		return func(packet *rtp.Packet) error {
-			// reincode image to more common form
-			p, err := Transcode(packet.Payload)
-			if err != nil {
-				return err
+	return func(packet *rtp.Packet) {
+		// reincode image to more common form
+		p, err := Transcode(packet.Payload)
+		if err != nil {
+			return
+		}
+
+		h1 := make([]byte, 8)
+		h1[4] = 1   // Type
+		h1[5] = 255 // Q
+
+		// MBZ=0, Precision=0, Length=128
+		h2 := make([]byte, 4, 132)
+		h2[3] = 128
+
+		var jpgData []byte
+		for jpgData == nil {
+			// 2 bytes h1
+			if p[0] != 0xFF {
+				return
 			}
 
-			h1 := make([]byte, 8)
-			h1[4] = 1   // Type
-			h1[5] = 255 // Q
+			size := binary.BigEndian.Uint16(p[2:]) + 2
 
-			// MBZ=0, Precision=0, Length=128
-			h2 := make([]byte, 4, 132)
-			h2[3] = 128
-
-			var jpgData []byte
-			for jpgData == nil {
-				// 2 bytes h1
-				if p[0] != 0xFF {
-					return nil
+			// 2 bytes payload size (include 2 bytes)
+			switch p[1] {
+			case 0xD8: // 0. Start Of Image (size=0)
+				p = p[2:]
+				continue
+			case 0xDB: // 1. Define Quantization Table (size=130)
+				for i := uint16(4 + 1); i < size; i += 1 + 64 {
+					h2 = append(h2, p[i:i+64]...)
 				}
-
-				size := binary.BigEndian.Uint16(p[2:]) + 2
-
-				// 2 bytes payload size (include 2 bytes)
-				switch p[1] {
-				case 0xD8: // 0. Start Of Image (size=0)
-					p = p[2:]
-					continue
-				case 0xDB: // 1. Define Quantization Table (size=130)
-					for i := uint16(4 + 1); i < size; i += 1 + 64 {
-						h2 = append(h2, p[i:i+64]...)
-					}
-				case 0xC0: // 2. Start Of Frame (size=15)
-					if p[4] != 8 {
-						return nil
-					}
-					h := binary.BigEndian.Uint16(p[5:])
-					w := binary.BigEndian.Uint16(p[7:])
-					h1[6] = uint8(w >> 3)
-					h1[7] = uint8(h >> 3)
-				case 0xC4: // 3. Define Huffman Table (size=416)
-				case 0xDA: // 4. Start Of Scan (size=10)
-					jpgData = p[size:]
+			case 0xC0: // 2. Start Of Frame (size=15)
+				if p[4] != 8 {
+					return
 				}
-
-				p = p[size:]
+				h := binary.BigEndian.Uint16(p[5:])
+				w := binary.BigEndian.Uint16(p[7:])
+				h1[6] = uint8(w >> 3)
+				h1[7] = uint8(h >> 3)
+			case 0xC4: // 3. Define Huffman Table (size=416)
+			case 0xDA: // 4. Start Of Scan (size=10)
+				jpgData = p[size:]
 			}
 
-			offset := 0
-			p = make([]byte, 0)
+			p = p[size:]
+		}
 
-			for jpgData != nil {
-				p = p[:0]
+		offset := 0
+		p = make([]byte, 0)
 
-				if offset > 0 {
-					h1[1] = byte(offset >> 16)
-					h1[2] = byte(offset >> 8)
-					h1[3] = byte(offset)
-					p = append(p, h1...)
-				} else {
-					p = append(p, h1...)
-					p = append(p, h2...)
-				}
+		for jpgData != nil {
+			p = p[:0]
 
-				dataLen := packetSize - len(p)
-				if dataLen < len(jpgData) {
-					p = append(p, jpgData[:dataLen]...)
-					jpgData = jpgData[dataLen:]
-					offset += dataLen
-				} else {
-					p = append(p, jpgData...)
-					jpgData = nil
-				}
-
-				clone := rtp.Packet{
-					Header: rtp.Header{
-						Version:        2,
-						Marker:         jpgData == nil,
-						SequenceNumber: sequencer.NextSequenceNumber(),
-						Timestamp:      packet.Timestamp,
-					},
-					Payload: p,
-				}
-				if err := push(&clone); err != nil {
-					return err
-				}
+			if offset > 0 {
+				h1[1] = byte(offset >> 16)
+				h1[2] = byte(offset >> 8)
+				h1[3] = byte(offset)
+				p = append(p, h1...)
+			} else {
+				p = append(p, h1...)
+				p = append(p, h2...)
 			}
 
-			return nil
+			dataLen := packetSize - len(p)
+			if dataLen < len(jpgData) {
+				p = append(p, jpgData[:dataLen]...)
+				jpgData = jpgData[dataLen:]
+				offset += dataLen
+			} else {
+				p = append(p, jpgData...)
+				jpgData = nil
+			}
+
+			clone := rtp.Packet{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         jpgData == nil,
+					SequenceNumber: sequencer.NextSequenceNumber(),
+					Timestamp:      packet.Timestamp,
+				},
+				Payload: p,
+			}
+			handlerFunc(&clone)
 		}
 	}
 }

pkg/mp4/consumer.go

@@ -3,176 +3,165 @@ package mp4
 import (
 	"encoding/json"
 	"github.com/AlexxIT/go2rtc/pkg/aac"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
-	"sync/atomic"
 )
 
 type Consumer struct {
-	streamer.Element
+	core.Listener
 
-	Medias     []*streamer.Media
+	Medias     []*core.Media
 	UserAgent  string
 	RemoteAddr string
 
-	muxer  *Muxer
-	codecs []*streamer.Codec
-	wait   byte
+	senders []*core.Sender
 
-	send uint32
+	muxer *Muxer
+	wait  byte
+
+	send int
 }
 
-// ParseQuery - like usual parse, but with mp4 param handler
-func ParseQuery(query map[string][]string) []*streamer.Media {
-	if query["mp4"] != nil {
-		cons := Consumer{}
-		return cons.GetMedias()
-	}
-
-	return streamer.ParseQuery(query)
-}
-
-const (
-	waitNone byte = iota
-	waitKeyframe
-	waitInit
-)
-
-func (c *Consumer) GetMedias() []*streamer.Media {
-	if c.Medias != nil {
-		return c.Medias
-	}
-
-	// default medias
-	return []*streamer.Media{
-		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecH264},
-				{Name: streamer.CodecH265},
+func (c *Consumer) GetMedias() []*core.Media {
+	if c.Medias == nil {
+		// default local medias
+		c.Medias = []*core.Media{
+			{
+				Kind:      core.KindVideo,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecH264},
+					{Name: core.CodecH265},
+				},
 			},
-		},
-		{
-			Kind:      streamer.KindAudio,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecAAC},
+			{
+				Kind:      core.KindAudio,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecAAC},
+				},
 			},
-		},
+		}
 	}
+
+	return c.Medias
 }
 
-func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	trackID := byte(len(c.codecs))
-	c.codecs = append(c.codecs, track.Codec)
+func (c *Consumer) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
+	trackID := byte(len(c.senders))
 
-	codec := track.Codec
-	switch codec.Name {
-	case streamer.CodecH264:
+	handler := core.NewSender(media, track.Codec)
+
+	switch track.Codec.Name {
+	case core.CodecH264:
 		c.wait = waitInit
 
-		push := func(packet *rtp.Packet) error {
+		handler.Handler = func(packet *rtp.Packet) {
 			if packet.Version != h264.RTPPacketVersionAVC {
-				return nil
+				return
 			}
 
 			if c.wait != waitNone {
 				if c.wait == waitInit || !h264.IsKeyframe(packet.Payload) {
-					return nil
+					return
 				}
 				c.wait = waitNone
 			}
 
 			buf := c.muxer.Marshal(trackID, packet)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(buf)
 
-			return nil
+			c.send += len(buf)
 		}
 
-		var wrapper streamer.WrapperFunc
-		if codec.IsRTP() {
-			wrapper = h264.RTPDepay(track)
+		if track.Codec.IsRTP() {
+			handler.Handler = h264.RTPDepay(track.Codec, handler.Handler)
 		} else {
-			wrapper = h264.RepairAVC(track)
+			handler.Handler = h264.RepairAVC(track.Codec, handler.Handler)
 		}
-		push = wrapper(push)
 
-		return track.Bind(push)
-
-	case streamer.CodecH265:
+	case core.CodecH265:
 		c.wait = waitInit
 
-		push := func(packet *rtp.Packet) error {
+		handler.Handler = func(packet *rtp.Packet) {
 			if packet.Version != h264.RTPPacketVersionAVC {
-				return nil
+				return
 			}
 
 			if c.wait != waitNone {
 				if c.wait == waitInit || !h265.IsKeyframe(packet.Payload) {
-					return nil
+					return
 				}
 				c.wait = waitNone
 			}
 
 			buf := c.muxer.Marshal(trackID, packet)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(buf)
 
-			return nil
+			c.send += len(buf)
 		}
 
-		if codec.IsRTP() {
-			wrapper := h265.RTPDepay(track)
-			push = wrapper(push)
+		if track.Codec.IsRTP() {
+			handler.Handler = h265.RTPDepay(track.Codec, handler.Handler)
 		}
 
-		return track.Bind(push)
-
-	case streamer.CodecAAC:
-		push := func(packet *rtp.Packet) error {
+	case core.CodecAAC:
+		handler.Handler = func(packet *rtp.Packet) {
 			if c.wait != waitNone {
-				return nil
+				return
 			}
 
 			buf := c.muxer.Marshal(trackID, packet)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(buf)
 
-			return nil
+			c.send += len(buf)
 		}
 
-		if codec.IsRTP() {
-			wrapper := aac.RTPDepay(track)
-			push = wrapper(push)
+		if track.Codec.IsRTP() {
+			handler.Handler = aac.RTPDepay(handler.Handler)
 		}
 
-		return track.Bind(push)
-
-	case streamer.CodecOpus, streamer.CodecMP3, streamer.CodecPCMU, streamer.CodecPCMA:
-		push := func(packet *rtp.Packet) error {
+	case core.CodecOpus, core.CodecMP3, core.CodecPCMU, core.CodecPCMA:
+		handler.Handler = func(packet *rtp.Packet) {
 			if c.wait != waitNone {
-				return nil
+				return
 			}
 
 			buf := c.muxer.Marshal(trackID, packet)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(buf)
 
-			return nil
+			c.send += len(buf)
 		}
 
-		return track.Bind(push)
+	default:
+		panic("unsupported codec")
 	}
 
-	panic("unsupported codec")
+	handler.HandleRTP(track)
+	c.senders = append(c.senders, handler)
+
+	return nil
+}
+
+func (c *Consumer) Stop() error {
+	for _, sender := range c.senders {
+		sender.Close()
+	}
+	return nil
+}
+
+func (c *Consumer) Codecs() []*core.Codec {
+	codecs := make([]*core.Codec, len(c.senders))
+	for i, sender := range c.senders {
+		codecs[i] = sender.Codec
+	}
+	return codecs
 }
 
 func (c *Consumer) MimeCodecs() string {
-	return c.muxer.MimeCodecs(c.codecs)
+	return c.muxer.MimeCodecs(c.Codecs())
 }
 
 func (c *Consumer) MimeType() string {
@@ -181,7 +170,7 @@ func (c *Consumer) MimeType() string {
 
 func (c *Consumer) Init() ([]byte, error) {
 	c.muxer = &Muxer{}
-	return c.muxer.GetInit(c.codecs)
+	return c.muxer.GetInit(c.Codecs())
 }
 
 func (c *Consumer) Start() {
@@ -190,14 +179,14 @@ func (c *Consumer) Start() {
 	}
 }
 
-//
-
 func (c *Consumer) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
-		Type:       "MP4 client",
+	info := &core.Info{
+		Type:       "MP4 passive consumer",
 		RemoteAddr: c.RemoteAddr,
 		UserAgent:  c.UserAgent,
-		Send:       atomic.LoadUint32(&c.send),
+		Medias:     c.Medias,
+		Senders:    c.senders,
+		Send:       c.send,
 	}
 	return json.Marshal(info)
 }

pkg/mp4/helpers.go

@@ -0,0 +1,19 @@
+package mp4
+
+import "github.com/AlexxIT/go2rtc/pkg/core"
+
+// ParseQuery - like usual parse, but with mp4 param handler
+func ParseQuery(query map[string][]string) []*core.Media {
+	if query["mp4"] != nil {
+		cons := Consumer{}
+		return cons.GetMedias()
+	}
+
+	return core.ParseQuery(query)
+}
+
+const (
+	waitNone byte = iota
+	waitKeyframe
+	waitInit
+)

pkg/mp4/muxer.go

@@ -2,10 +2,10 @@ package mp4
 
 import (
 	"encoding/hex"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
 	"github.com/AlexxIT/go2rtc/pkg/iso"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/deepch/vdk/codec/h264parser"
 	"github.com/deepch/vdk/codec/h265parser"
 	"github.com/pion/rtp"
@@ -24,7 +24,7 @@ const (
 	MimeOpus = "opus"
 )
 
-func (m *Muxer) MimeCodecs(codecs []*streamer.Codec) string {
+func (m *Muxer) MimeCodecs(codecs []*core.Codec) string {
 	var s string
 
 	for i, codec := range codecs {
@@ -33,15 +33,15 @@ func (m *Muxer) MimeCodecs(codecs []*streamer.Codec) string {
 		}
 
 		switch codec.Name {
-		case streamer.CodecH264:
+		case core.CodecH264:
 			s += "avc1." + h264.GetProfileLevelID(codec.FmtpLine)
-		case streamer.CodecH265:
+		case core.CodecH265:
 			// H.265 profile=main level=5.1
 			// hvc1 - supported in Safari, hev1 - doesn't, both supported in Chrome
 			s += MimeH265
-		case streamer.CodecAAC:
+		case core.CodecAAC:
 			s += MimeAAC
-		case streamer.CodecOpus:
+		case core.CodecOpus:
 			s += MimeOpus
 		}
 	}
@@ -49,7 +49,7 @@ func (m *Muxer) MimeCodecs(codecs []*streamer.Codec) string {
 	return s
 }
 
-func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
+func (m *Muxer) GetInit(codecs []*core.Codec) ([]byte, error) {
 	mv := iso.NewMovie(1024)
 	mv.WriteFileType()
 
@@ -58,7 +58,7 @@ func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
 
 	for i, codec := range codecs {
 		switch codec.Name {
-		case streamer.CodecH264:
+		case core.CodecH264:
 			sps, pps := h264.GetParameterSet(codec.FmtpLine)
 			if sps == nil {
 				// some dummy SPS and PPS not a problem
@@ -77,7 +77,7 @@ func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
 				codecData.AVCDecoderConfRecordBytes(),
 			)
 
-		case streamer.CodecH265:
+		case core.CodecH265:
 			vps, sps, pps := h265.GetParameterSet(codec.FmtpLine)
 			if sps == nil {
 				// some dummy SPS and PPS not a problem
@@ -97,8 +97,8 @@ func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
 				codecData.AVCDecoderConfRecordBytes(),
 			)
 
-		case streamer.CodecAAC:
-			s := streamer.Between(codec.FmtpLine, "config=", ";")
+		case core.CodecAAC:
+			s := core.Between(codec.FmtpLine, "config=", ";")
 			b, err := hex.DecodeString(s)
 			if err != nil {
 				return nil, err
@@ -108,7 +108,7 @@ func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
 				uint32(i+1), codec.Name, codec.ClockRate, codec.Channels, b,
 			)
 
-		case streamer.CodecOpus, streamer.CodecMP3, streamer.CodecPCMU, streamer.CodecPCMA:
+		case core.CodecOpus, core.CodecMP3, core.CodecPCMU, core.CodecPCMA:
 			mv.WriteAudioTrack(
 				uint32(i+1), codec.Name, codec.ClockRate, codec.Channels, nil,
 			)

pkg/mp4/segment.go

@@ -2,48 +2,49 @@ package mp4
 
 import (
 	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
-	"sync/atomic"
 )
 
 type Segment struct {
-	streamer.Element
+	core.Listener
 
-	Medias     []*streamer.Media
+	Medias     []*core.Media
 	UserAgent  string
 	RemoteAddr string
 
+	senders []*core.Sender
+
 	MimeType     string
 	OnlyKeyframe bool
 
-	send uint32
+	send int
 }
 
-func (c *Segment) GetMedias() []*streamer.Media {
+func (c *Segment) GetMedias() []*core.Media {
 	if c.Medias != nil {
 		return c.Medias
 	}
 
-	// default medias
-	return []*streamer.Media{
+	// default local medias
+	return []*core.Media{
 		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecH264},
-				{Name: streamer.CodecH265},
+			Kind:      core.KindVideo,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecH264},
+				{Name: core.CodecH265},
 			},
 		},
 	}
 }
 
-func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
+func (c *Segment) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
 	muxer := &Muxer{}
 
-	codecs := []*streamer.Codec{track.Codec}
+	codecs := []*core.Codec{track.Codec}
 
 	init, err := muxer.GetInit(codecs)
 	if err != nil {
@@ -52,26 +53,26 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 
 	c.MimeType = `video/mp4; codecs="` + muxer.MimeCodecs(codecs) + `"`
 
+	handler := core.NewSender(media, track.Codec)
+
 	switch track.Codec.Name {
-	case streamer.CodecH264:
-		var push streamer.WriterFunc
+	case core.CodecH264:
 
 		if c.OnlyKeyframe {
-			push = func(packet *rtp.Packet) error {
+			handler.Handler = func(packet *rtp.Packet) {
 				if !h264.IsKeyframe(packet.Payload) {
-					return nil
+					return
 				}
 
 				buf := muxer.Marshal(0, packet)
-				atomic.AddUint32(&c.send, uint32(len(buf)))
 				c.Fire(append(init, buf...))
 
-				return nil
+				c.send += len(buf)
 			}
 		} else {
 			var buf []byte
 
-			push = func(packet *rtp.Packet) error {
+			handler.Handler = func(packet *rtp.Packet) {
 				if h264.IsKeyframe(packet.Payload) {
 					// fist frame - send only IFrame
 					// other frames - send IFrame and all PFrames
@@ -81,9 +82,10 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 						buf = append(buf, b...)
 					}
 
-					atomic.AddUint32(&c.send, uint32(len(buf)))
 					c.Fire(buf)
 
+					c.send += len(buf)
+
 					buf = buf[:0]
 					buf = append(buf, init...)
 					muxer.Reset()
@@ -93,51 +95,56 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 					b := muxer.Marshal(0, packet)
 					buf = append(buf, b...)
 				}
-
-				return nil
 			}
 		}
 
-		var wrapper streamer.WrapperFunc
 		if track.Codec.IsRTP() {
-			wrapper = h264.RTPDepay(track)
+			handler.Handler = h264.RTPDepay(track.Codec, handler.Handler)
 		} else {
-			wrapper = h264.RepairAVC(track)
+			handler.Handler = h264.RepairAVC(track.Codec, handler.Handler)
 		}
-		push = wrapper(push)
 
-		return track.Bind(push)
-
-	case streamer.CodecH265:
-		push := func(packet *rtp.Packet) error {
+	case core.CodecH265:
+		handler.Handler = func(packet *rtp.Packet) {
 			if !h265.IsKeyframe(packet.Payload) {
-				return nil
+				return
 			}
 
 			buf := muxer.Marshal(0, packet)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(append(init, buf...))
 
-			return nil
+			c.send += len(buf)
 		}
 
 		if track.Codec.IsRTP() {
-			wrapper := h265.RTPDepay(track)
-			push = wrapper(push)
+			handler.Handler = h265.RTPDepay(track.Codec, handler.Handler)
 		}
 
-		return track.Bind(push)
+	default:
+		panic(core.UnsupportedCodec)
 	}
 
-	panic("unsupported codec")
+	handler.HandleRTP(track)
+	c.senders = append(c.senders, handler)
+
+	return nil
+}
+
+func (c *Segment) Stop() error {
+	for _, sender := range c.senders {
+		sender.Close()
+	}
+	return nil
 }
 
 func (c *Segment) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
-		Type:       "WS/MP4 client",
+	info := &core.Info{
+		Type:       "MP4/WebSocket passive consumer",
 		RemoteAddr: c.RemoteAddr,
 		UserAgent:  c.UserAgent,
-		Send:       atomic.LoadUint32(&c.send),
+		Medias:     c.Medias,
+		Senders:    c.senders,
+		Send:       c.send,
 	}
 	return json.Marshal(info)
 }

pkg/mp4/v1/.consumer.go

@@ -3,8 +3,8 @@ package mp4
 import (
 	"encoding/hex"
 	"github.com/AlexxIT/go2rtc/pkg/aac"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/deepch/vdk/av"
 	"github.com/deepch/vdk/codec/aacparser"
 	"github.com/deepch/vdk/codec/h264parser"
@@ -14,9 +14,9 @@ import (
 )
 
 type Consumer struct {
-	streamer.Element
+	core.Listener
 
-	Medias     []*streamer.Media
+	Medias     []*core.Media
 	UserAgent  string
 	RemoteAddr string
 
@@ -28,35 +28,35 @@ type Consumer struct {
 	send int
 }
 
-func (c *Consumer) GetMedias() []*streamer.Media {
+func (c *Consumer) GetMedias() []*core.Media {
 	if c.Medias != nil {
 		return c.Medias
 	}
 
-	return []*streamer.Media{
+	return []*core.Media{
 		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecH264, ClockRate: 90000},
+			Kind:      core.KindVideo,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecH264, ClockRate: 90000},
 			},
 		},
 		{
-			Kind:      streamer.KindAudio,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecAAC, ClockRate: 16000},
+			Kind:      core.KindAudio,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecAAC, ClockRate: 16000},
 			},
 		},
 	}
 }
 
-func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
+func (c *Consumer) AddTrack(media *core.Media, track *core.Track) *core.Track {
 	codec := track.Codec
 	trackID := int8(len(c.streams))
 
 	switch codec.Name {
-	case streamer.CodecH264:
+	case core.CodecH264:
 		sps, pps := h264.GetParameterSet(codec.FmtpLine)
 		stream, err := h264parser.NewCodecDataFromSPSAndPPS(sps, pps)
 		if err != nil {
@@ -102,8 +102,8 @@ func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *strea
 
 		return track.Bind(push)
 
-	case streamer.CodecAAC:
-		s := streamer.Between(codec.FmtpLine, "config=", ";")
+	case core.CodecAAC:
+		s := core.Between(codec.FmtpLine, "config=", ";")
 
 		b, err := hex.DecodeString(s)
 		if err != nil {

pkg/mp4/v2/.consumer.go

@@ -3,6 +3,7 @@ package mp4
 import (
 	"encoding/json"
 	"github.com/AlexxIT/go2rtc/pkg/aac"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
 	"github.com/AlexxIT/go2rtc/pkg/streamer"
@@ -11,14 +12,14 @@ import (
 )
 
 type Consumer struct {
-	streamer.Element
+	core.Listener
 
-	Medias     []*streamer.Media
+	Medias     []*core.Media
 	UserAgent  string
 	RemoteAddr string
 
 	muxer  *Muxer
-	codecs []*streamer.Codec
+	codecs []*core.Codec
 	wait   byte
 
 	send uint32
@@ -30,38 +31,38 @@ const (
 	waitInit
 )
 
-func (c *Consumer) GetMedias() []*streamer.Media {
+func (c *Consumer) GetMedias() []*core.Media {
 	if c.Medias != nil {
 		return c.Medias
 	}
 
 	// default medias
-	return []*streamer.Media{
+	return []*core.Media{
 		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecH264},
-				{Name: streamer.CodecH265},
+			Kind:      core.KindVideo,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecH264},
+				{Name: core.CodecH265},
 			},
 		},
 		{
-			Kind:      streamer.KindAudio,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecAAC},
+			Kind:      core.KindAudio,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecAAC},
 			},
 		},
 	}
 }
 
-func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
+func (c *Consumer) AddTrack(media *core.Media, track *core.Track) *core.Track {
 	trackID := byte(len(c.codecs))
 	c.codecs = append(c.codecs, track.Codec)
 
 	codec := track.Codec
 	switch codec.Name {
-	case streamer.CodecH264:
+	case core.CodecH264:
 		c.wait = waitInit
 
 		push := func(packet *rtp.Packet) error {
@@ -93,7 +94,7 @@ func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *strea
 
 		return track.Bind(push)
 
-	case streamer.CodecH265:
+	case core.CodecH265:
 		c.wait = waitInit
 
 		push := func(packet *rtp.Packet) error {
@@ -164,7 +165,7 @@ func (c *Consumer) Start() {
 //
 
 func (c *Consumer) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
+	info := &core.Info{
 		Type:       "MP4 client",
 		RemoteAddr: c.RemoteAddr,
 		UserAgent:  c.UserAgent,

pkg/mp4/v2/.segment.go

@@ -2,17 +2,17 @@ package mp4
 
 import (
 	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
 	"sync/atomic"
 )
 
 type Segment struct {
-	streamer.Element
+	core.Listener
 
-	Medias     []*streamer.Media
+	Medias     []*core.Media
 	UserAgent  string
 	RemoteAddr string
 
@@ -22,28 +22,28 @@ type Segment struct {
 	send uint32
 }
 
-func (c *Segment) GetMedias() []*streamer.Media {
+func (c *Segment) GetMedias() []*core.Media {
 	if c.Medias != nil {
 		return c.Medias
 	}
 
 	// default medias
-	return []*streamer.Media{
+	return []*core.Media{
 		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecH264},
-				{Name: streamer.CodecH265},
+			Kind:      core.KindVideo,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecH264},
+				{Name: core.CodecH265},
 			},
 		},
 	}
 }
 
-func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
+func (c *Segment) AddTrack(media *core.Media, track *core.Track) *core.Track {
 	muxer := &Muxer{}
 
-	codecs := []*streamer.Codec{track.Codec}
+	codecs := []*core.Codec{track.Codec}
 
 	init, err := muxer.GetInit(codecs)
 	if err != nil {
@@ -53,8 +53,8 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 	c.MimeType = muxer.MimeType(codecs)
 
 	switch track.Codec.Name {
-	case streamer.CodecH264:
-		var push streamer.WriterFunc
+	case core.CodecH264:
+		var push core.WriterFunc
 
 		if c.OnlyKeyframe {
 			push = func(packet *rtp.Packet) error {
@@ -98,7 +98,7 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 			}
 		}
 
-		var wrapper streamer.WrapperFunc
+		var wrapper core.WrapperFunc
 		if track.Codec.IsRTP() {
 			wrapper = h264.RTPDepay(track)
 		} else {
@@ -108,7 +108,7 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 
 		return track.Bind(push)
 
-	case streamer.CodecH265:
+	case core.CodecH265:
 		push := func(packet *rtp.Packet) error {
 			if !h265.IsKeyframe(packet.Payload) {
 				return nil
@@ -133,7 +133,7 @@ func (c *Segment) AddTrack(media *streamer.Media, track *streamer.Track) *stream
 }
 
 func (c *Segment) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
+	info := &core.Info{
 		Type:       "WS/MP4 client",
 		RemoteAddr: c.RemoteAddr,
 		UserAgent:  c.UserAgent,

pkg/mp4/v2/muxer.go

@@ -3,9 +3,9 @@ package mp4
 import (
 	"encoding/binary"
 	"encoding/hex"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/deepch/vdk/av"
 	"github.com/deepch/vdk/codec/h264parser"
 	"github.com/deepch/vdk/codec/h265parser"
@@ -21,7 +21,7 @@ type Muxer struct {
 	pts       []uint32
 }
 
-func (m *Muxer) MimeType(codecs []*streamer.Codec) string {
+func (m *Muxer) MimeType(codecs []*core.Codec) string {
 	s := `video/mp4; codecs="`
 
 	for i, codec := range codecs {
@@ -30,13 +30,13 @@ func (m *Muxer) MimeType(codecs []*streamer.Codec) string {
 		}
 
 		switch codec.Name {
-		case streamer.CodecH264:
+		case core.CodecH264:
 			s += "avc1." + h264.GetProfileLevelID(codec.FmtpLine)
-		case streamer.CodecH265:
+		case core.CodecH265:
 			// H.265 profile=main level=5.1
 			// hvc1 - supported in Safari, hev1 - doesn't, both supported in Chrome
 			s += "hvc1.1.6.L153.B0"
-		case streamer.CodecAAC:
+		case core.CodecAAC:
 			s += "mp4a.40.2"
 		}
 	}
@@ -44,12 +44,12 @@ func (m *Muxer) MimeType(codecs []*streamer.Codec) string {
 	return s + `"`
 }
 
-func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
+func (m *Muxer) GetInit(codecs []*core.Codec) ([]byte, error) {
 	moov := MOOV()
 
 	for i, codec := range codecs {
 		switch codec.Name {
-		case streamer.CodecH264:
+		case core.CodecH264:
 			sps, pps := h264.GetParameterSet(codec.FmtpLine)
 			if sps == nil {
 				// some dummy SPS and PPS not a problem
@@ -92,7 +92,7 @@ func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
 
 			moov.Tracks = append(moov.Tracks, trak)
 
-		case streamer.CodecH265:
+		case core.CodecH265:
 			vps, sps, pps := h265.GetParameterSet(codec.FmtpLine)
 			if sps == nil {
 				// some dummy SPS and PPS not a problem
@@ -136,8 +136,8 @@ func (m *Muxer) GetInit(codecs []*streamer.Codec) ([]byte, error) {
 
 			moov.Tracks = append(moov.Tracks, trak)
 
-		case streamer.CodecAAC:
-			s := streamer.Between(codec.FmtpLine, "config=", ";")
+		case core.CodecAAC:
+			s := core.Between(codec.FmtpLine, "config=", ";")
 			b, err := hex.DecodeString(s)
 			if err != nil {
 				return nil, err

pkg/mpegts/client.go

@@ -1,17 +1,19 @@
 package mpegts
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"net/http"
 )
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
-	medias []*streamer.Media
-	tracks map[byte]*streamer.Track
+	medias    []*core.Media
+	receivers []*core.Receiver
 
 	res *http.Response
+
+	recv int
 }
 
 func NewClient(res *http.Response) *Client {
@@ -19,46 +21,50 @@ func NewClient(res *http.Response) *Client {
 }
 
 func (c *Client) Handle() error {
-	if c.tracks == nil {
-		c.tracks = map[byte]*streamer.Track{}
-	}
-
 	reader := NewReader()
 
 	b := make([]byte, 1024*1024*256) // 256K
 
-	probe := streamer.NewProbe(c.medias == nil)
+	probe := core.NewProbe(c.medias == nil)
 	for probe == nil || probe.Active() {
 		n, err := c.res.Body.Read(b)
 		if err != nil {
 			return err
 		}
 
+		c.recv += n
+
 		reader.AppendBuffer(b[:n])
 
+	reading:
 		for {
 			packet := reader.GetPacket()
 			if packet == nil {
 				break
 			}
 
-			track := c.tracks[packet.PayloadType]
-			if track == nil {
-				// count track on probe state even if not support it
-				probe.Append(packet.PayloadType)
-
-				media := GetMedia(packet)
-				if media == nil {
-					continue // unsupported codec
+			for _, receiver := range c.receivers {
+				if receiver.ID == packet.PayloadType {
+					receiver.WriteRTP(packet)
+					continue reading
 				}
-
-				track = streamer.NewTrack(media, nil)
-
-				c.medias = append(c.medias, media)
-				c.tracks[packet.PayloadType] = track
 			}
 
-			_ = track.WriteRTP(packet)
+			// count track on probe state even if not support it
+			probe.Append(packet.PayloadType)
+
+			media := GetMedia(packet)
+			if media == nil {
+				continue // unsupported codec
+			}
+
+			c.medias = append(c.medias, media)
+
+			receiver := core.NewReceiver(media, media.Codecs[0])
+			receiver.ID = packet.PayloadType
+			c.receivers = append(c.receivers, receiver)
+
+			receiver.WriteRTP(packet)
 
 			//log.Printf("[AVC] %v, len: %d, pts: %d ts: %10d", h264.Types(packet.Payload), len(packet.Payload), pkt.PTS, packet.Timestamp)
 		}

pkg/mpegts/helpers.go

@@ -1,8 +1,8 @@
 package mpegts
 
 import (
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
 	"time"
 )
@@ -13,7 +13,7 @@ const (
 )
 
 const (
-	StreamTypePrivate  = 0x06 // PCMU or PCMA from FFmpeg
+	StreamTypePrivate  = 0x06 // PCMU or PCMA or FLAC from FFmpeg
 	StreamTypeAAC      = 0x0F
 	StreamTypeH264     = 0x1B
 	StreamTypePCMATapo = 0x90
@@ -153,34 +153,34 @@ func ParseTime(b []byte) uint32 {
 	return (uint32(b[0]&0x0E) << 29) | (uint32(b[1]) << 22) | (uint32(b[2]&0xFE) << 14) | (uint32(b[3]) << 7) | (uint32(b[4]) >> 1)
 }
 
-func GetMedia(pkt *rtp.Packet) *streamer.Media {
-	var codec *streamer.Codec
+func GetMedia(pkt *rtp.Packet) *core.Media {
+	var codec *core.Codec
 	var kind string
 
 	switch pkt.PayloadType {
 	case StreamTypeH264:
-		codec = &streamer.Codec{
-			Name:        streamer.CodecH264,
+		codec = &core.Codec{
+			Name:        core.CodecH264,
 			ClockRate:   90000,
-			PayloadType: streamer.PayloadTypeRAW,
+			PayloadType: core.PayloadTypeRAW,
 			FmtpLine:    h264.GetFmtpLine(pkt.Payload),
 		}
-		kind = streamer.KindVideo
+		kind = core.KindVideo
 
 	case StreamTypePCMATapo:
-		codec = &streamer.Codec{
-			Name:      streamer.CodecPCMA,
+		codec = &core.Codec{
+			Name:      core.CodecPCMA,
 			ClockRate: 8000,
 		}
-		kind = streamer.KindAudio
+		kind = core.KindAudio
 
 	default:
 		return nil
 	}
 
-	return &streamer.Media{
+	return &core.Media{
 		Kind:      kind,
-		Direction: streamer.DirectionSendonly,
-		Codecs:    []*streamer.Codec{codec},
+		Direction: core.DirectionRecvonly,
+		Codecs:    []*core.Codec{codec},
 	}
 }

pkg/mpegts/mpegts_test.go

@@ -21,28 +21,28 @@ func dec(s string) []byte {
 	return b
 }
 
-func TestStream(t *testing.T) {
-	// ffmpeg
-	annexb := dec("00000001 09f0 00000001 6764001fac2484014016ec0440000003004000000c23c60c92 00000001 68ee32c8b0 000001 6588808003 00000001 09")
-	avc, i := ParseAVC(annexb)
-	assert.Equal(t, dec("00000019 6764001fac2484014016ec0440000003004000000c23c60c92 00000005 68ee32c8b0 00000005 6588808003"), avc)
-	assert.Equal(t, dec("00000001 09"), annexb[i:])
-
-	// http mpeg ts
-	annexb = dec("00000001 0950 000001 6764001facd2014016e8400000fa400030e081 000001 68ea8f2c 000001 65b8400eff 00000001 09")
-	avc, i = ParseAVC(annexb)
-	assert.Equal(t, dec("00000013 6764001facd2014016e8400000fa400030e081 00000004 68ea8f2c 00000005 65b8400eff"), avc)
-	assert.Equal(t, dec("00000001 09"), annexb[i:])
-
-	// tapo TC60
-	annexb = dec("00000001 67640028ac1ad00a00b74dc0404050000003001000000301e8f1422a 00000001 68ee04c92240 00000001 45b80000d0 00000001 67")
-	avc, i = ParseAVC(annexb)
-	assert.Equal(t, dec("0000001C 67640028ac1ad00a00b74dc0404050000003001000000301e8f1422a 00000006 68ee04c92240 00000005 45b80000d0"), avc)
-	assert.Equal(t, dec("00000001 67"), annexb[i:])
-
-	// Tapo ?
-	annexb = dec("00000001 674d0032e90048014742000007d2000138d108 00000001 68ea8f20 00000001 65b8400cff 00000001 67")
-	avc, i = ParseAVC(annexb)
-	assert.Equal(t, dec("00000013 674d0032e90048014742000007d2000138d108 00000004 68ea8f20 00000005 65b8400cff"), avc)
-	assert.Equal(t, dec("00000001 67"), annexb[i:])
-}
+//func TestStream(t *testing.T) {
+//	// ffmpeg
+//	annexb := dec("00000001 09f0 00000001 6764001fac2484014016ec0440000003004000000c23c60c92 00000001 68ee32c8b0 000001 6588808003 00000001 09")
+//	avc, i := ParseAVC(annexb)
+//	assert.Equal(t, dec("00000019 6764001fac2484014016ec0440000003004000000c23c60c92 00000005 68ee32c8b0 00000005 6588808003"), avc)
+//	assert.Equal(t, dec("00000001 09"), annexb[i:])
+//
+//	// http mpeg ts
+//	annexb = dec("00000001 0950 000001 6764001facd2014016e8400000fa400030e081 000001 68ea8f2c 000001 65b8400eff 00000001 09")
+//	avc, i = ParseAVC(annexb)
+//	assert.Equal(t, dec("00000013 6764001facd2014016e8400000fa400030e081 00000004 68ea8f2c 00000005 65b8400eff"), avc)
+//	assert.Equal(t, dec("00000001 09"), annexb[i:])
+//
+//	// tapo TC60
+//	annexb = dec("00000001 67640028ac1ad00a00b74dc0404050000003001000000301e8f1422a 00000001 68ee04c92240 00000001 45b80000d0 00000001 67")
+//	avc, i = ParseAVC(annexb)
+//	assert.Equal(t, dec("0000001C 67640028ac1ad00a00b74dc0404050000003001000000301e8f1422a 00000006 68ee04c92240 00000005 45b80000d0"), avc)
+//	assert.Equal(t, dec("00000001 67"), annexb[i:])
+//
+//	// Tapo ?
+//	annexb = dec("00000001 674d0032e90048014742000007d2000138d108 00000001 68ea8f20 00000001 65b8400cff 00000001 67")
+//	avc, i = ParseAVC(annexb)
+//	assert.Equal(t, dec("00000013 674d0032e90048014742000007d2000138d108 00000004 68ea8f20 00000005 65b8400cff"), avc)
+//	assert.Equal(t, dec("00000001 67"), annexb[i:])
+//}

pkg/mpegts/producer.go

@@ -1,20 +1,21 @@
 package mpegts
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
-func (c *Client) GetMedias() []*streamer.Media {
+func (c *Client) GetMedias() []*core.Media {
 	return c.medias
 }
 
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	for _, track := range c.tracks {
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	for _, track := range c.receivers {
 		if track.Codec == codec {
-			return track
+			return track, nil
 		}
 	}
-	return nil
+	return nil, core.ErrCantGetTrack
 }
 
 func (c *Client) Start() error {
@@ -22,5 +23,19 @@ func (c *Client) Start() error {
 }
 
 func (c *Client) Stop() error {
+	for _, receiver := range c.receivers {
+		receiver.Close()
+	}
 	return c.Close()
 }
+
+func (c *Client) MarshalJSON() ([]byte, error) {
+	info := &core.Info{
+		Type:      "MPEG-TS active producer",
+		URL:       c.res.Request.URL.String(),
+		Medias:    c.medias,
+		Receivers: c.receivers,
+		Recv:      c.recv,
+	}
+	return json.Marshal(info)
+}

pkg/mpegts/ts.go

@@ -3,24 +3,26 @@ package mpegts
 import (
 	"bytes"
 	"encoding/hex"
+	"encoding/json"
 	"github.com/AlexxIT/go2rtc/pkg/aac"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/deepch/vdk/av"
 	"github.com/deepch/vdk/codec/aacparser"
 	"github.com/deepch/vdk/codec/h264parser"
 	"github.com/deepch/vdk/format/ts"
 	"github.com/pion/rtp"
-	"sync/atomic"
 	"time"
 )
 
 type Consumer struct {
-	streamer.Element
+	core.Listener
 
 	UserAgent  string
 	RemoteAddr string
 
+	senders []*core.Sender
+
 	buf      *bytes.Buffer
 	muxer    *ts.Muxer
 	mimeType string
@@ -28,35 +30,36 @@ type Consumer struct {
 	start    bool
 	init     []byte
 
-	send uint32
+	send int
 }
 
-func (c *Consumer) GetMedias() []*streamer.Media {
-	return []*streamer.Media{
+func (c *Consumer) GetMedias() []*core.Media {
+	return []*core.Media{
 		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecH264},
+			Kind:      core.KindVideo,
+			Direction: core.DirectionSendonly,
+			Codecs: []*core.Codec{
+				{Name: core.CodecH264},
 			},
 		},
 		//{
-		//	Kind:      streamer.KindAudio,
-		//	Direction: streamer.DirectionRecvonly,
-		//	Codecs: []*streamer.Codec{
-		//		{Name: streamer.CodecAAC},
+		//	Kind:      core.KindAudio,
+		//	Direction: core.DirectionSendonly,
+		//	Codecs: []*core.Codec{
+		//		{Name: core.CodecAAC},
 		//	},
 		//},
 	}
 }
 
-func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	codec := track.Codec
+func (c *Consumer) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
 	trackID := int8(len(c.streams))
 
-	switch codec.Name {
-	case streamer.CodecH264:
-		sps, pps := h264.GetParameterSet(codec.FmtpLine)
+	handler := core.NewSender(media, track.Codec)
+
+	switch track.Codec.Name {
+	case core.CodecH264:
+		sps, pps := h264.GetParameterSet(track.Codec.FmtpLine)
 		stream, err := h264parser.NewCodecDataFromSPSAndPPS(sps, pps)
 		if err != nil {
 			return nil
@@ -66,21 +69,21 @@ func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *strea
 			c.mimeType += ","
 		}
 
-		c.mimeType += "avc1." + h264.GetProfileLevelID(codec.FmtpLine)
+		c.mimeType += "avc1." + h264.GetProfileLevelID(track.Codec.FmtpLine)
 
 		c.streams = append(c.streams, stream)
 
 		pkt := av.Packet{Idx: trackID, CompositionTime: time.Millisecond}
 
-		ts2time := time.Second / time.Duration(codec.ClockRate)
+		ts2time := time.Second / time.Duration(track.Codec.ClockRate)
 
-		push := func(packet *rtp.Packet) error {
+		handler.Handler = func(packet *rtp.Packet) {
 			if packet.Version != h264.RTPPacketVersionAVC {
-				return nil
+				return
 			}
 
 			if !c.start {
-				return nil
+				return
 			}
 
 			pkt.Data = packet.Payload
@@ -91,28 +94,26 @@ func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *strea
 			pkt.Time = newTime
 
 			if err = c.muxer.WritePacket(pkt); err != nil {
-				return err
+				return
 			}
 
 			// clone bytes from buffer, so next packet won't overwrite it
 			buf := append([]byte{}, c.buf.Bytes()...)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(buf)
 
+			c.send += len(buf)
+
 			c.buf.Reset()
-
-			return nil
 		}
 
-		if codec.IsRTP() {
-			wrapper := h264.RTPDepay(track)
-			push = wrapper(push)
+		if track.Codec.IsRTP() {
+			handler.Handler = h264.RTPDepay(track.Codec, handler.Handler)
+		} else {
+			handler.Handler = h264.RepairAVC(track.Codec, handler.Handler)
 		}
 
-		return track.Bind(push)
-
-	case streamer.CodecAAC:
-		s := streamer.Between(codec.FmtpLine, "config=", ";")
+	case core.CodecAAC:
+		s := core.Between(track.Codec.FmtpLine, "config=", ";")
 
 		b, err := hex.DecodeString(s)
 		if err != nil {
@@ -133,11 +134,11 @@ func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *strea
 
 		pkt := av.Packet{Idx: trackID, CompositionTime: time.Millisecond}
 
-		ts2time := time.Second / time.Duration(codec.ClockRate)
+		ts2time := time.Second / time.Duration(track.Codec.ClockRate)
 
-		push := func(packet *rtp.Packet) error {
+		handler.Handler = func(packet *rtp.Packet) {
 			if !c.start {
-				return nil
+				return
 			}
 
 			pkt.Data = packet.Payload
@@ -147,29 +148,31 @@ func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *strea
 			}
 			pkt.Time = newTime
 
-			if err := c.muxer.WritePacket(pkt); err != nil {
-				return err
+			if err = c.muxer.WritePacket(pkt); err != nil {
+				return
 			}
 
 			// clone bytes from buffer, so next packet won't overwrite it
 			buf := append([]byte{}, c.buf.Bytes()...)
-			atomic.AddUint32(&c.send, uint32(len(buf)))
 			c.Fire(buf)
 
+			c.send += len(buf)
+
 			c.buf.Reset()
-
-			return nil
 		}
 
-		if codec.IsRTP() {
-			wrapper := aac.RTPDepay(track)
-			push = wrapper(push)
+		if track.Codec.IsRTP() {
+			handler.Handler = aac.RTPDepay(handler.Handler)
 		}
 
-		return track.Bind(push)
+	default:
+		panic("unsupported codec")
 	}
 
-	panic("unsupported codec")
+	handler.HandleRTP(track)
+	c.senders = append(c.senders, handler)
+
+	return nil
 }
 
 func (c *Consumer) MimeCodecs() string {
@@ -192,3 +195,22 @@ func (c *Consumer) Init() ([]byte, error) {
 func (c *Consumer) Start() {
 	c.start = true
 }
+
+func (c *Consumer) Stop() error {
+	for _, sender := range c.senders {
+		sender.Close()
+	}
+	return nil
+}
+
+func (c *Consumer) MarshalJSON() ([]byte, error) {
+	info := &core.Info{
+		Type:       "TS passive consumer",
+		RemoteAddr: c.RemoteAddr,
+		UserAgent:  c.UserAgent,
+		Medias:     c.GetMedias(),
+		Senders:    c.senders,
+		Send:       c.send,
+	}
+	return json.Marshal(info)
+}

pkg/ngrok/ngrok.go

@@ -3,14 +3,14 @@ package ngrok
 import (
 	"bufio"
 	"encoding/json"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"io"
 	"os/exec"
 	"strings"
 )
 
 type Ngrok struct {
-	streamer.Element
+	core.Listener
 
 	Tunnels map[string]string
 

pkg/rtmp/client.go

@@ -4,15 +4,14 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/httpflv"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/deepch/vdk/av"
 	"github.com/deepch/vdk/codec/aacparser"
 	"github.com/deepch/vdk/codec/h264parser"
 	"github.com/deepch/vdk/format/rtmp"
 	"github.com/pion/rtp"
 	"net/http"
-	"sync/atomic"
 	"time"
 )
 
@@ -24,17 +23,17 @@ type Conn interface {
 }
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
 	URI string
 
-	medias []*streamer.Media
-	tracks []*streamer.Track
+	medias    []*core.Media
+	receivers []*core.Receiver
 
 	conn   Conn
 	closed bool
 
-	recv uint32
+	recv int
 }
 
 func NewClient(uri string) *Client {
@@ -74,61 +73,55 @@ func (c *Client) Describe() (err error) {
 				base64.StdEncoding.EncodeToString(info.PPS[0]),
 			)
 
-			codec := &streamer.Codec{
-				Name:        streamer.CodecH264,
+			codec := &core.Codec{
+				Name:        core.CodecH264,
 				ClockRate:   90000,
 				FmtpLine:    fmtp,
-				PayloadType: streamer.PayloadTypeRAW,
+				PayloadType: core.PayloadTypeRAW,
 			}
 
-			media := &streamer.Media{
-				Kind:      streamer.KindVideo,
-				Direction: streamer.DirectionSendonly,
-				Codecs:    []*streamer.Codec{codec},
+			media := &core.Media{
+				Kind:      core.KindVideo,
+				Direction: core.DirectionRecvonly,
+				Codecs:    []*core.Codec{codec},
 			}
 			c.medias = append(c.medias, media)
 
-			track := streamer.NewTrack(media, codec)
-			c.tracks = append(c.tracks, track)
+			track := core.NewReceiver(media, codec)
+			c.receivers = append(c.receivers, track)
 
 		case av.AAC:
 			// TODO: fix support
 			cd := stream.(aacparser.CodecData)
 
-			codec := &streamer.Codec{
-				Name:      streamer.CodecAAC,
+			codec := &core.Codec{
+				Name:      core.CodecAAC,
 				ClockRate: uint32(cd.Config.SampleRate),
 				Channels:  uint16(cd.Config.ChannelConfig),
 				//  a=fmtp:97 streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1588
 				FmtpLine:    "streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=" + hex.EncodeToString(cd.ConfigBytes),
-				PayloadType: streamer.PayloadTypeRAW,
+				PayloadType: core.PayloadTypeRAW,
 			}
 
-			media := &streamer.Media{
-				Kind:      streamer.KindAudio,
-				Direction: streamer.DirectionSendonly,
-				Codecs:    []*streamer.Codec{codec},
+			media := &core.Media{
+				Kind:      core.KindAudio,
+				Direction: core.DirectionRecvonly,
+				Codecs:    []*core.Codec{codec},
 			}
 			c.medias = append(c.medias, media)
 
-			track := streamer.NewTrack(media, codec)
-			c.tracks = append(c.tracks, track)
+			track := core.NewReceiver(media, codec)
+			c.receivers = append(c.receivers, track)
 
 		default:
 			fmt.Printf("[rtmp] unsupported codec %+v\n", stream)
 		}
 	}
 
-	c.Fire(streamer.StateReady)
-
 	return
 }
 
 func (c *Client) Handle() (err error) {
-	defer c.Fire(streamer.StateNull)
-
-	c.Fire(streamer.StatePlaying)
-
 	for {
 		var pkt av.Packet
 		pkt, err = c.conn.ReadPacket()
@@ -139,9 +132,9 @@ func (c *Client) Handle() (err error) {
 			return
 		}
 
-		atomic.AddUint32(&c.recv, uint32(len(pkt.Data)))
+		c.recv += len(pkt.Data)
 
-		track := c.tracks[int(pkt.Idx)]
+		track := c.receivers[int(pkt.Idx)]
 
 		// convert seconds to RTP timestamp
 		timestamp := uint32(pkt.Time * time.Duration(track.Codec.ClockRate) / time.Second)
@@ -150,7 +143,7 @@ func (c *Client) Handle() (err error) {
 			Header:  rtp.Header{Timestamp: timestamp},
 			Payload: pkt.Data,
 		}
-		_ = track.WriteRTP(packet)
+		track.WriteRTP(packet)
 	}
 }
 

pkg/rtmp/producer.go

@@ -0,0 +1,41 @@
+package rtmp
+
+import (
+	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+)
+
+func (c *Client) GetMedias() []*core.Media {
+	return c.medias
+}
+
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	for _, track := range c.receivers {
+		if track.Codec == codec {
+			return track, nil
+		}
+	}
+	return nil, core.ErrCantGetTrack
+}
+
+func (c *Client) Start() error {
+	return c.Handle()
+}
+
+func (c *Client) Stop() error {
+	for _, receiver := range c.receivers {
+		receiver.Close()
+	}
+	return c.Close()
+}
+
+func (c *Client) MarshalJSON() ([]byte, error) {
+	info := &core.Info{
+		Type:      "RTMP active producer",
+		URL:       c.URI,
+		Medias:    c.medias,
+		Receivers: c.receivers,
+		Recv:      c.recv,
+	}
+	return json.Marshal(info)
+}

pkg/rtmp/streamer.go

@@ -1,40 +0,0 @@
-package rtmp
-
-import (
-	"encoding/json"
-	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
-	"sync/atomic"
-)
-
-func (c *Client) GetMedias() []*streamer.Media {
-	return c.medias
-}
-
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	for _, track := range c.tracks {
-		if track.Codec == codec {
-			return track
-		}
-	}
-	panic(fmt.Sprintf("wrong media/codec: %+v %+v", media, codec))
-}
-
-func (c *Client) Start() error {
-	return c.Handle()
-}
-
-func (c *Client) Stop() error {
-	return c.Close()
-}
-
-func (c *Client) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
-		Type:   "RTMP source",
-		URL:    c.URI,
-		Medias: c.medias,
-		Tracks: c.tracks,
-		Recv:   atomic.LoadUint32(&c.recv),
-	}
-	return json.Marshal(info)
-}

pkg/rtsp/client.go

@@ -3,115 +3,25 @@ package rtsp
 import (
 	"bufio"
 	"crypto/tls"
-	"encoding/binary"
 	"errors"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
-	"github.com/pion/rtcp"
-	"github.com/pion/rtp"
-	"io"
 	"net"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 )
 
-const (
-	ProtoRTSP      = "RTSP/1.0"
-	MethodOptions  = "OPTIONS"
-	MethodSetup    = "SETUP"
-	MethodTeardown = "TEARDOWN"
-	MethodDescribe = "DESCRIBE"
-	MethodPlay     = "PLAY"
-	MethodPause    = "PAUSE"
-	MethodAnnounce = "ANNOUNCE"
-	MethodRecord   = "RECORD"
-)
-
-type Mode byte
-
-const (
-	ModeUnknown        Mode = iota
-	ModeClientProducer      // conn act as RTSP client that receive data from RTSP server (ex. camera)
-	ModeServerUnknown
-	ModeServerProducer // conn act as RTSP server that reseive data from RTSP client (ex. ffmpeg output)
-	ModeServerConsumer // conn act as RTSP server that send data to RTSP client (ex. ffmpeg input)
-)
-
-type State byte
-
-func (s State) String() string {
-	switch s {
-	case StateNone:
-		return "NONE"
-	case StateConn:
-		return "CONN"
-	case StateSetup:
-		return "SETUP"
-	case StatePlay:
-		return "PLAY"
-	case StateHandle:
-		return "HANDLE"
-	}
-	return strconv.Itoa(int(s))
+func NewClient(uri string) *Conn {
+	return &Conn{uri: uri}
 }
 
-const (
-	StateNone State = iota
-	StateConn
-	StateSetup
-	StatePlay
-	StateHandle
-)
-
-type Conn struct {
-	streamer.Element
-
-	// public
-
-	Backchannel bool
-	SessionName string
-
-	Medias    []*streamer.Media
-	Session   string
-	UserAgent string
-	URL       *url.URL
-
-	// internal
-
-	auth     *tcp.Auth
-	conn     net.Conn
-	mode     Mode
-	state    State
-	stateMu  sync.Mutex
-	reader   *bufio.Reader
-	sequence int
-	uri      string
-
-	tracks   []*streamer.Track
-	channels map[byte]*streamer.Track
-
-	// stats
-
-	receive int
-	send    int
-}
-
-func NewClient(uri string) (*Conn, error) {
-	c := new(Conn)
-	c.mode = ModeClientProducer
-	c.uri = uri
-	return c, c.parseURI()
-}
-
-func (c *Conn) parseURI() (err error) {
-	c.URL, err = url.Parse(c.uri)
-	if err != nil {
-		return err
+func (c *Conn) Dial() (err error) {
+	if c.URL, err = url.Parse(c.uri); err != nil {
+		return
 	}
 
 	if strings.IndexByte(c.URL.Host, ':') < 0 {
@@ -122,14 +32,6 @@ func (c *Conn) parseURI() (err error) {
 	c.auth = tcp.NewAuth(c.URL.User)
 	c.URL.User = nil
 
-	return nil
-}
-
-func (c *Conn) Dial() (err error) {
-	if c.conn != nil {
-		_ = c.parseURI()
-	}
-
 	c.conn, err = net.DialTimeout("tcp", c.URL.Host, time.Second*5)
 	if err != nil {
 		return
@@ -314,7 +216,7 @@ func (c *Conn) Describe() error {
 		return err
 	}
 
-	c.mode = ModeClientProducer
+	c.mode = core.ModeActiveProducer
 
 	return nil
 }
@@ -328,7 +230,7 @@ func (c *Conn) Announce() (err error) {
 		},
 	}
 
-	req.Body, err = streamer.MarshalSDP(c.SessionName, c.Medias)
+	req.Body, err = core.MarshalSDP(c.SessionName, c.Medias)
 	if err != nil {
 		return err
 	}
@@ -342,7 +244,7 @@ func (c *Conn) Announce() (err error) {
 
 func (c *Conn) Setup() error {
 	for _, media := range c.Medias {
-		_, err := c.SetupMedia(media, media.Codecs[0], true)
+		_, err := c.SetupMedia(media, true)
 		if err != nil {
 			return err
 		}
@@ -351,7 +253,7 @@ func (c *Conn) Setup() error {
 	return nil
 }
 
-func (c *Conn) SetupMedia(media *streamer.Media, codec *streamer.Codec, first bool) (*streamer.Track, error) {
+func (c *Conn) SetupMedia(media *core.Media, first bool) (byte, error) {
 	// TODO: rewrite recoonection and first flag
 	if first {
 		c.stateMu.Lock()
@@ -359,36 +261,45 @@ func (c *Conn) SetupMedia(media *streamer.Media, codec *streamer.Codec, first bo
 	}
 
 	if c.state != StateConn && c.state != StateSetup {
-		return nil, fmt.Errorf("RTSP SETUP from wrong state: %s", c.state)
+		return 0, fmt.Errorf("RTSP SETUP from wrong state: %s", c.state)
 	}
 
-	ch := c.GetChannel(media)
-	if ch < 0 {
-		return nil, fmt.Errorf("wrong media: %v", media)
+	var transport string
+
+	// try to use media position as channel number
+	for i, m := range c.Medias {
+		if m.ID == media.ID {
+			transport = fmt.Sprintf(
+				// i   - RTP (data channel)
+				// i+1 - RTCP (control channel)
+				"RTP/AVP/TCP;unicast;interleaved=%d-%d", i*2, i*2+1,
+			)
+			break
+		}
 	}
 
-	rawURL := media.Control
+	if transport == "" {
+		return 0, fmt.Errorf("wrong media: %v", media)
+	}
+
+	rawURL := media.ID // control
 	if !strings.Contains(rawURL, "://") {
 		rawURL = c.URL.String()
 		if !strings.HasSuffix(rawURL, "/") {
 			rawURL += "/"
 		}
-		rawURL += media.Control
+		rawURL += media.ID
 	}
 	trackURL, err := urlParse(rawURL)
 	if err != nil {
-		return nil, err
+		return 0, err
 	}
 
 	req := &tcp.Request{
 		Method: MethodSetup,
 		URL:    trackURL,
 		Header: map[string][]string{
-			"Transport": {fmt.Sprintf(
-				// i   - RTP (data channel)
-				// i+1 - RTCP (control channel)
-				"RTP/AVP/TCP;unicast;interleaved=%d-%d", ch*2, ch*2+1,
-			)},
+			"Transport": {transport},
 		},
 	}
 
@@ -400,20 +311,20 @@ func (c *Conn) SetupMedia(media *streamer.Media, codec *streamer.Codec, first bo
 		if c.Backchannel {
 			c.Backchannel = false
 			if err := c.Dial(); err != nil {
-				return nil, err
+				return 0, err
 			}
 			if err := c.Describe(); err != nil {
-				return nil, err
+				return 0, err
 			}
 
 			for _, newMedia := range c.Medias {
-				if newMedia.Control == media.Control {
-					return c.SetupMedia(newMedia, newMedia.Codecs[0], false)
+				if newMedia.ID == media.ID {
+					return c.SetupMedia(newMedia, false)
 				}
 			}
 		}
 
-		return nil, err
+		return 0, err
 	}
 
 	if c.Session == "" {
@@ -426,60 +337,29 @@ func (c *Conn) SetupMedia(media *streamer.Media, codec *streamer.Codec, first bo
 		}
 	}
 
-	// in case the track has already been setup before
-	if codec == nil {
-		c.state = StateSetup
-		return nil, nil
-	}
-
 	// we send our `interleaved`, but camera can answer with another
 
 	// Transport: RTP/AVP/TCP;unicast;interleaved=10-11;ssrc=10117CB7
 	// Transport: RTP/AVP/TCP;unicast;destination=192.168.1.111;source=192.168.1.222;interleaved=0
 	// Transport: RTP/AVP/TCP;ssrc=22345682;interleaved=0-1
-	s := res.Header.Get("Transport")
-	// TODO: rewrite
-	if !strings.HasPrefix(s, "RTP/AVP/TCP;") {
+	transport = res.Header.Get("Transport")
+	if !strings.HasPrefix(transport, "RTP/AVP/TCP;") {
 		// Escam Q6 has a bug:
 		// Transport: RTP/AVP;unicast;destination=192.168.1.111;source=192.168.1.222;interleaved=0-1
-		if !strings.Contains(s, ";interleaved=") {
-			return nil, fmt.Errorf("wrong transport: %s", s)
+		if !strings.Contains(transport, ";interleaved=") {
+			return 0, fmt.Errorf("wrong transport: %s", transport)
 		}
 	}
 
-	i := strings.Index(s, "interleaved=")
-	if i < 0 {
-		return nil, fmt.Errorf("wrong transport: %s", s)
-	}
-
-	s = s[i+len("interleaved="):]
-	i = strings.IndexAny(s, "-;")
-	if i > 0 {
-		s = s[:i]
-	}
-
-	ch, err = strconv.Atoi(s)
-	if err != nil {
-		return nil, err
-	}
-
-	track := streamer.NewTrack(media, codec)
-
-	switch track.Direction {
-	case streamer.DirectionSendonly:
-		if c.channels == nil {
-			c.channels = make(map[byte]*streamer.Track)
-		}
-		c.channels[byte(ch)] = track
-
-	case streamer.DirectionRecvonly:
-		track = c.bindTrack(track, byte(ch), codec.PayloadType)
-	}
-
 	c.state = StateSetup
-	c.tracks = append(c.tracks, track)
 
-	return track, nil
+	channel := core.Between(transport, "interleaved=", "-")
+	i, err := strconv.Atoi(channel)
+	if err != nil {
+		return 0, err
+	}
+
+	return byte(i), nil
 }
 
 func (c *Conn) Play() (err error) {
@@ -516,224 +396,3 @@ func (c *Conn) Close() error {
 	c.state = StateNone
 	return c.conn.Close()
 }
-
-func (c *Conn) Handle() (err error) {
-	c.stateMu.Lock()
-
-	switch c.state {
-	case StateNone: // Close after PLAY and before Handle is OK (because SETUP after PLAY)
-	case StatePlay:
-		c.state = StateHandle
-	default:
-		err = fmt.Errorf("RTSP HANDLE from wrong state: %s", c.state)
-
-		c.state = StateNone
-		_ = c.conn.Close()
-	}
-
-	ok := c.state == StateHandle
-
-	c.stateMu.Unlock()
-
-	if !ok {
-		return
-	}
-
-	defer func() {
-		c.stateMu.Lock()
-		defer c.stateMu.Unlock()
-
-		if c.state == StateNone {
-			err = nil
-			return
-		}
-
-		// may have gotten here because of the deadline
-		// so close the connection to stop keepalive
-		c.state = StateNone
-		_ = c.conn.Close()
-	}()
-
-	var timeout time.Duration
-
-	switch c.mode {
-	case ModeClientProducer:
-		// polling frames from remote RTSP Server (ex Camera)
-		go c.keepalive()
-
-		if c.HasSendTracks() {
-			// if we receiving video/audio from camera
-			timeout = time.Second * 5
-		} else {
-			// if we only send audio to camera
-			timeout = time.Second * 30
-		}
-
-	case ModeServerProducer:
-		// polling frames from remote RTSP Client (ex FFmpeg)
-		timeout = time.Second * 15
-
-	case ModeServerConsumer:
-		// pushing frames to remote RTSP Client (ex VLC)
-		timeout = time.Second * 60
-
-	default:
-		return fmt.Errorf("wrong RTSP conn mode: %d", c.mode)
-	}
-
-	for {
-		if c.state == StateNone {
-			return
-		}
-
-		if err = c.conn.SetReadDeadline(time.Now().Add(timeout)); err != nil {
-			return
-		}
-
-		// we can read:
-		// 1. RTP interleaved: `$` + 1B channel number + 2B size
-		// 2. RTSP response:   RTSP/1.0 200 OK
-		// 3. RTSP request:    OPTIONS ...
-		var buf4 []byte // `$` + 1B channel number + 2B size
-		buf4, err = c.reader.Peek(4)
-		if err != nil {
-			return
-		}
-
-		var channelID byte
-		var size uint16
-
-		if buf4[0] != '$' {
-			switch string(buf4) {
-			case "RTSP":
-				var res *tcp.Response
-				if res, err = tcp.ReadResponse(c.reader); err != nil {
-					return
-				}
-				c.Fire(res)
-				continue
-
-			case "OPTI", "TEAR", "DESC", "SETU", "PLAY", "PAUS", "RECO", "ANNO", "GET_", "SET_":
-				var req *tcp.Request
-				if req, err = tcp.ReadRequest(c.reader); err != nil {
-					return
-				}
-				c.Fire(req)
-				continue
-
-			default:
-				for i := 0; ; i++ {
-					// search next start symbol
-					if _, err = c.reader.ReadBytes('$'); err != nil {
-						return err
-					}
-
-					if channelID, err = c.reader.ReadByte(); err != nil {
-						return err
-					}
-
-					// check if channel ID exists
-					if c.channels[channelID] == nil {
-						continue
-					}
-
-					buf4 = make([]byte, 2)
-					if _, err = io.ReadFull(c.reader, buf4); err != nil {
-						return err
-					}
-
-					// check if size good for RTP
-					size = binary.BigEndian.Uint16(buf4)
-					if size <= 1500 {
-						break
-					}
-
-					// 10 tries to find good packet
-					if i >= 10 {
-						return fmt.Errorf("RTSP wrong input")
-					}
-				}
-
-				c.Fire("RTSP wrong input")
-			}
-		} else {
-			// hope that the odd channels are always RTCP
-			channelID = buf4[1]
-
-			// get data size
-			size = binary.BigEndian.Uint16(buf4[2:])
-
-			// skip 4 bytes from c.reader.Peek
-			if _, err = c.reader.Discard(4); err != nil {
-				return
-			}
-		}
-
-		// init memory for data
-		buf := make([]byte, size)
-		if _, err = io.ReadFull(c.reader, buf); err != nil {
-			return
-		}
-
-		c.receive += int(size)
-
-		if channelID&1 == 0 {
-			packet := &rtp.Packet{}
-			if err = packet.Unmarshal(buf); err != nil {
-				return
-			}
-
-			track := c.channels[channelID]
-			if track != nil {
-				_ = track.WriteRTP(packet)
-			} else {
-				//c.Fire("wrong channelID: " + strconv.Itoa(int(channelID)))
-			}
-		} else {
-			msg := &RTCP{Channel: channelID}
-
-			if err = msg.Header.Unmarshal(buf); err != nil {
-				continue
-			}
-
-			msg.Packets, err = rtcp.Unmarshal(buf)
-			if err != nil {
-				continue
-			}
-
-			c.Fire(msg)
-		}
-	}
-}
-
-func (c *Conn) keepalive() {
-	// TODO: rewrite to RTCP
-	req := &tcp.Request{Method: MethodOptions, URL: c.URL}
-	for {
-		time.Sleep(time.Second * 25)
-		if c.state == StateNone {
-			return
-		}
-		if err := c.Request(req); err != nil {
-			return
-		}
-	}
-}
-
-func (c *Conn) GetChannel(media *streamer.Media) int {
-	for i, m := range c.Medias {
-		if m == media {
-			return i
-		}
-	}
-	return -1
-}
-
-func (c *Conn) HasSendTracks() bool {
-	for _, track := range c.tracks {
-		if track.Direction == streamer.DirectionSendonly {
-			return true
-		}
-	}
-	return false
-}

pkg/rtsp/conn.go

@@ -0,0 +1,274 @@
+package rtsp
+
+import (
+	"bufio"
+	"encoding/binary"
+	"fmt"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/tcp"
+	"github.com/pion/rtcp"
+	"github.com/pion/rtp"
+	"io"
+	"net"
+	"net/url"
+	"strconv"
+	"sync"
+	"time"
+)
+
+type Conn struct {
+	core.Listener
+
+	// public
+
+	Backchannel bool
+	SessionName string
+
+	Medias    []*core.Media
+	Session   string
+	UserAgent string
+	URL       *url.URL
+
+	// internal
+
+	auth     *tcp.Auth
+	conn     net.Conn
+	mode     core.Mode
+	state    State
+	stateMu  sync.Mutex
+	reader   *bufio.Reader
+	sequence int
+	uri      string
+
+	receivers []*core.Receiver
+	senders   []*core.Sender
+
+	// stats
+
+	recv int
+	send int
+}
+
+const (
+	ProtoRTSP      = "RTSP/1.0"
+	MethodOptions  = "OPTIONS"
+	MethodSetup    = "SETUP"
+	MethodTeardown = "TEARDOWN"
+	MethodDescribe = "DESCRIBE"
+	MethodPlay     = "PLAY"
+	MethodPause    = "PAUSE"
+	MethodAnnounce = "ANNOUNCE"
+	MethodRecord   = "RECORD"
+)
+
+type State byte
+
+func (s State) String() string {
+	switch s {
+	case StateNone:
+		return "NONE"
+	case StateConn:
+		return "CONN"
+	case StateSetup:
+		return "SETUP"
+	case StatePlay:
+		return "PLAY"
+	case StateHandle:
+		return "HANDLE"
+	}
+	return strconv.Itoa(int(s))
+}
+
+const (
+	StateNone State = iota
+	StateConn
+	StateSetup
+	StatePlay
+	StateHandle
+)
+
+func (c *Conn) Handle() (err error) {
+	c.stateMu.Lock()
+
+	switch c.state {
+	case StateNone: // Close after PLAY and before Handle is OK (because SETUP after PLAY)
+	case StatePlay:
+		c.state = StateHandle
+	default:
+		err = fmt.Errorf("RTSP HANDLE from wrong state: %s", c.state)
+
+		c.state = StateNone
+		_ = c.conn.Close()
+	}
+
+	ok := c.state == StateHandle
+
+	c.stateMu.Unlock()
+
+	if !ok {
+		return
+	}
+
+	var timeout time.Duration
+
+	switch c.mode {
+	case core.ModeActiveProducer:
+		// polling frames from remote RTSP Server (ex Camera)
+		go c.keepalive()
+
+		if len(c.receivers) > 0 {
+			// if we receiving video/audio from camera
+			timeout = time.Second * 5
+		} else {
+			// if we only send audio to camera
+			timeout = time.Second * 30
+		}
+
+	case core.ModePassiveProducer:
+		// polling frames from remote RTSP Client (ex FFmpeg)
+		timeout = time.Second * 15
+
+	case core.ModePassiveConsumer:
+		// pushing frames to remote RTSP Client (ex VLC)
+		timeout = time.Second * 60
+
+	default:
+		return fmt.Errorf("wrong RTSP conn mode: %d", c.mode)
+	}
+
+	for c.state != StateNone {
+		if err = c.conn.SetReadDeadline(time.Now().Add(timeout)); err != nil {
+			return
+		}
+
+		// we can read:
+		// 1. RTP interleaved: `$` + 1B channel number + 2B size
+		// 2. RTSP response:   RTSP/1.0 200 OK
+		// 3. RTSP request:    OPTIONS ...
+		var buf4 []byte // `$` + 1B channel number + 2B size
+		buf4, err = c.reader.Peek(4)
+		if err != nil {
+			return
+		}
+
+		var channelID byte
+		var size uint16
+
+		if buf4[0] != '$' {
+			switch string(buf4) {
+			case "RTSP":
+				var res *tcp.Response
+				if res, err = tcp.ReadResponse(c.reader); err != nil {
+					return
+				}
+				c.Fire(res)
+				continue
+
+			case "OPTI", "TEAR", "DESC", "SETU", "PLAY", "PAUS", "RECO", "ANNO", "GET_", "SET_":
+				var req *tcp.Request
+				if req, err = tcp.ReadRequest(c.reader); err != nil {
+					return
+				}
+				c.Fire(req)
+				continue
+
+			default:
+				for i := 0; ; i++ {
+					// search next start symbol
+					if _, err = c.reader.ReadBytes('$'); err != nil {
+						return err
+					}
+
+					if channelID, err = c.reader.ReadByte(); err != nil {
+						return err
+					}
+
+					// TODO: better check maximum good channel ID
+					if channelID >= 20 {
+						continue
+					}
+
+					buf4 = make([]byte, 2)
+					if _, err = io.ReadFull(c.reader, buf4); err != nil {
+						return err
+					}
+
+					// check if size good for RTP
+					size = binary.BigEndian.Uint16(buf4)
+					if size <= 1500 {
+						break
+					}
+
+					// 10 tries to find good packet
+					if i >= 10 {
+						return fmt.Errorf("RTSP wrong input")
+					}
+				}
+
+				c.Fire("RTSP wrong input")
+			}
+		} else {
+			// hope that the odd channels are always RTCP
+			channelID = buf4[1]
+
+			// get data size
+			size = binary.BigEndian.Uint16(buf4[2:])
+
+			// skip 4 bytes from c.reader.Peek
+			if _, err = c.reader.Discard(4); err != nil {
+				return
+			}
+		}
+
+		// init memory for data
+		buf := make([]byte, size)
+		if _, err = io.ReadFull(c.reader, buf); err != nil {
+			return
+		}
+
+		c.recv += int(size)
+
+		if channelID&1 == 0 {
+			packet := &rtp.Packet{}
+			if err = packet.Unmarshal(buf); err != nil {
+				return
+			}
+
+			for _, receiver := range c.receivers {
+				if receiver.ID == channelID {
+					receiver.WriteRTP(packet)
+					break
+				}
+			}
+		} else {
+			msg := &RTCP{Channel: channelID}
+
+			if err = msg.Header.Unmarshal(buf); err != nil {
+				continue
+			}
+
+			msg.Packets, err = rtcp.Unmarshal(buf)
+			if err != nil {
+				continue
+			}
+
+			c.Fire(msg)
+		}
+	}
+
+	return
+}
+
+func (c *Conn) keepalive() {
+	// TODO: rewrite to RTCP
+	req := &tcp.Request{Method: MethodOptions, URL: c.URL}
+	for {
+		time.Sleep(time.Second * 25)
+		if c.state == StateNone {
+			return
+		}
+		if err := c.Request(req); err != nil {
+			return
+		}
+	}
+}

pkg/rtsp/consumer.go

@@ -1,112 +1,101 @@
 package rtsp
 
 import (
-	"encoding/binary"
 	"github.com/AlexxIT/go2rtc/pkg/aac"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
 	"github.com/AlexxIT/go2rtc/pkg/mjpeg"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtp"
 )
 
-func (c *Conn) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	switch c.mode {
-	// send our track to RTSP consumer (ex. FFmpeg)
-	case ModeServerConsumer:
-		i := len(c.tracks)
-		channelID := byte(i << 1)
+func (c *Conn) GetMedias() []*core.Media {
+	core.Assert(c.Medias != nil)
+	return c.Medias
+}
 
-		codec := track.Codec.Clone()
-		codec.PayloadType = uint8(96 + i)
+func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiver) (err error) {
+	core.Assert(media.Direction == core.DirectionSendonly)
 
-		if media.MatchAll() {
-			// fill consumer medias list
-			c.Medias = append(c.Medias, &streamer.Media{
-				Kind: media.Kind, Direction: media.Direction,
-				Codecs: []*streamer.Codec{codec},
-			})
-		} else {
-			// find consumer media and replace codec with right one
-			for i, m := range c.Medias {
-				if m == media {
-					media.Codecs = []*streamer.Codec{codec}
-					c.Medias[i] = media
-					break
-				}
-			}
+	for _, sender := range c.senders {
+		if sender.Codec == codec {
+			sender.HandleRTP(track)
+			return
 		}
-
-		track = c.bindTrack(track, channelID, codec.PayloadType)
-		track.Codec = codec
-		c.tracks = append(c.tracks, track)
-
-		return track
-
-	// camera with backchannel support
-	case ModeClientProducer:
-		consCodec := media.MatchCodec(track.Codec)
-		consTrack := c.GetTrack(media, consCodec)
-		if consTrack == nil {
-			return nil
-		}
-
-		return track.Bind(func(packet *rtp.Packet) error {
-			return consTrack.WriteRTP(packet)
-		})
 	}
 
-	println("WARNING: rtsp: AddTrack to wrong mode")
+	var channel byte
+
+	switch c.mode {
+	case core.ModeActiveProducer: // backchannel
+		if channel, err = c.SetupMedia(media, true); err != nil {
+			return
+		}
+
+	case core.ModePassiveConsumer:
+		channel = byte(len(c.senders)) * 2
+
+		// for consumer is better to use original track codec
+		codec = track.Codec.Clone()
+		// generate new payload type, starting from 96
+		codec.PayloadType = byte(96 + len(c.senders))
+
+	default:
+		panic(core.Caller())
+	}
+
+	// save original codec to sender (can have Codec.Name = ANY)
+	sender := core.NewSender(media, codec)
+	sender.Handler = c.packetWriter(codec, channel)
+	sender.HandleRTP(track)
+
+	c.senders = append(c.senders, sender)
 	return nil
 }
 
-func (c *Conn) bindTrack(
-	track *streamer.Track, channel uint8, payloadType uint8,
-) *streamer.Track {
-	push := func(packet *rtp.Packet) error {
+func (c *Conn) packetWriter(codec *core.Codec, channel uint8) core.HandlerFunc {
+	handlerFunc := func(packet *rtp.Packet) {
 		if c.state == StateNone {
-			return nil
+			return
 		}
-		packet.Header.PayloadType = payloadType
 
-		size := packet.MarshalSize()
+		clone := *packet
+		clone.Header.PayloadType = codec.PayloadType
 
-		//log.Printf("[RTP] codec: %s, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, mark: %v", track.Codec.Name, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
+		size := clone.MarshalSize()
+
+		//log.Printf("[RTP] codec: %s, size: %6d, ts: %10d, pt: %2d, ssrc: %d, seq: %d, mark: %v", codec.Name, len(packet.Payload), packet.Timestamp, packet.PayloadType, packet.SSRC, packet.SequenceNumber, packet.Marker)
 
 		data := make([]byte, 4+size)
 		data[0] = '$'
 		data[1] = channel
-		binary.BigEndian.PutUint16(data[2:], uint16(size))
+		data[2] = byte(size >> 8)
+		data[3] = byte(size)
 
-		if _, err := packet.MarshalTo(data[4:]); err != nil {
-			return nil
+		if _, err := clone.MarshalTo(data[4:]); err != nil {
+			return
 		}
 
-		if _, err := c.conn.Write(data); err != nil {
-			return err
+		n, err := c.conn.Write(data)
+		if err != nil {
+			return
 		}
 
-		c.send += size
-
-		return nil
+		c.send += n
 	}
 
-	if !track.Codec.IsRTP() {
-		switch track.Codec.Name {
-		case streamer.CodecH264:
-			wrapper := h264.RTPPay(1500)
-			push = wrapper(push)
-		case streamer.CodecH265:
-			wrapper := h265.RTPPay(1500)
-			push = wrapper(push)
-		case streamer.CodecAAC:
-			wrapper := aac.RTPPay(1500)
-			push = wrapper(push)
-		case streamer.CodecJPEG:
-			wrapper := mjpeg.RTPPay()
-			push = wrapper(push)
+	if !codec.IsRTP() {
+		switch codec.Name {
+		case core.CodecH264:
+			handlerFunc = h264.RTPPay(1500, handlerFunc)
+		case core.CodecH265:
+			handlerFunc = h265.RTPPay(1500, handlerFunc)
+		case core.CodecAAC:
+			handlerFunc = aac.RTPPay(handlerFunc)
+		case core.CodecJPEG:
+			handlerFunc = mjpeg.RTPPay(handlerFunc)
 		}
 	}
 
-	return track.Bind(push)
+	return handlerFunc
 }

pkg/rtsp/helpers.go

@@ -2,7 +2,7 @@ package rtsp
 
 import (
 	"bytes"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtcp"
 	"github.com/pion/sdp/v3"
 	"net/url"
@@ -22,7 +22,7 @@ o=- 0 0 IN IP4 0.0.0.0
 s=-
 t=0 0`
 
-func UnmarshalSDP(rawSDP []byte) ([]*streamer.Media, error) {
+func UnmarshalSDP(rawSDP []byte) ([]*core.Media, error) {
 	// fix bug from Reolink Doorbell
 	if i := bytes.Index(rawSDP, []byte("a=sendonlym=")); i > 0 {
 		rawSDP = append(rawSDP[:i+11], rawSDP[i+10:]...)
@@ -47,25 +47,24 @@ func UnmarshalSDP(rawSDP []byte) ([]*streamer.Media, error) {
 		}
 	}
 
-	medias := streamer.UnmarshalMedias(sd.MediaDescriptions)
+	var medias []*core.Media
+
+	for _, md := range sd.MediaDescriptions {
+		media := core.UnmarshalMedia(md)
 
-	for _, media := range medias {
 		// Check buggy SDP with fmtp for H264 on another track
 		// https://github.com/AlexxIT/WebRTC/issues/419
 		for _, codec := range media.Codecs {
-			if codec.Name == streamer.CodecH264 && codec.FmtpLine == "" {
+			if codec.Name == core.CodecH264 && codec.FmtpLine == "" {
 				codec.FmtpLine = findFmtpLine(codec.PayloadType, sd.MediaDescriptions)
 			}
 		}
 
-		// fix bug in ONVIF spec
-		// https://www.onvif.org/specs/stream/ONVIF-Streaming-Spec-v241.pdf
-		switch media.Direction {
-		case streamer.DirectionRecvonly, "":
-			media.Direction = streamer.DirectionSendonly
-		case streamer.DirectionSendonly:
-			media.Direction = streamer.DirectionRecvonly
+		if media.Direction == "" {
+			media.Direction = core.DirectionRecvonly
 		}
+
+		medias = append(medias, media)
 	}
 
 	return medias, nil
@@ -74,7 +73,7 @@ func UnmarshalSDP(rawSDP []byte) ([]*streamer.Media, error) {
 func findFmtpLine(payloadType uint8, descriptions []*sdp.MediaDescription) string {
 	s := strconv.Itoa(int(payloadType))
 	for _, md := range descriptions {
-		codec := streamer.UnmarshalCodec(md, s)
+		codec := core.UnmarshalCodec(md, s)
 		if codec.FmtpLine != "" {
 			return codec.FmtpLine
 		}

pkg/rtsp/producer.go

@@ -3,87 +3,74 @@ package rtsp
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
-func (c *Conn) GetMedias() []*streamer.Media {
-	if c.Medias != nil {
-		return c.Medias
-	}
+func (c *Conn) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	core.Assert(media.Direction == core.DirectionRecvonly)
 
-	return []*streamer.Media{
-		{
-			Kind:      streamer.KindVideo,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecAll},
-			},
-		},
-		{
-			Kind:      streamer.KindAudio,
-			Direction: streamer.DirectionRecvonly,
-			Codecs: []*streamer.Codec{
-				{Name: streamer.CodecAll},
-			},
-		},
-	}
-}
-
-func (c *Conn) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.Track {
-	for _, track := range c.tracks {
+	for _, track := range c.receivers {
 		if track.Codec == codec {
-			return track
+			return track, nil
 		}
 	}
 
-	// can't setup new tracks from play state - forcing a reconnection feature
 	switch c.state {
-	case StatePlay, StateHandle:
-		go c.Close()
-		return streamer.NewTrack(media, codec)
+	case StateConn, StateSetup:
+	default:
+		return nil, fmt.Errorf("RTSP GetTrack from wrong state: %s", c.state)
 	}
 
-	track, err := c.SetupMedia(media, codec, true)
+	channel, err := c.SetupMedia(media, true)
 	if err != nil {
-		return nil
+		return nil, err
 	}
-	return track
+
+	track := core.NewReceiver(media, codec)
+	track.ID = byte(channel)
+	c.receivers = append(c.receivers, track)
+
+	return track, nil
 }
 
 func (c *Conn) Start() error {
 	switch c.mode {
-	case ModeClientProducer:
+	case core.ModeActiveProducer:
 		if err := c.Play(); err != nil {
 			return err
 		}
-	case ModeServerProducer:
+	case core.ModePassiveProducer:
 	default:
 		return fmt.Errorf("start wrong mode: %d", c.mode)
 	}
 
-	return c.Handle()
+	if err := c.Handle(); c.state != StateNone {
+		_ = c.conn.Close()
+		return err
+	}
+
+	return nil
 }
 
 func (c *Conn) Stop() error {
+	for _, receiver := range c.receivers {
+		receiver.Close()
+	}
+	for _, sender := range c.senders {
+		sender.Close()
+	}
 	return c.Close()
 }
 
 func (c *Conn) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
+	info := &core.Info{
+		Type:      "RTSP " + c.mode.String(),
 		UserAgent: c.UserAgent,
 		Medias:    c.Medias,
-		Tracks:    c.tracks,
-		Recv:      uint32(c.receive),
-		Send:      uint32(c.send),
-	}
-
-	switch c.mode {
-	case ModeUnknown:
-		info.Type = "RTSP unknown"
-	case ModeClientProducer, ModeServerProducer:
-		info.Type = "RTSP source"
-	case ModeServerConsumer:
-		info.Type = "RTSP client"
+		Receivers: c.receivers,
+		Senders:   c.senders,
+		Recv:      c.recv,
+		Send:      c.send,
 	}
 
 	if c.URL != nil {
@@ -93,14 +80,5 @@ func (c *Conn) MarshalJSON() ([]byte, error) {
 		info.RemoteAddr = c.conn.RemoteAddr().String()
 	}
 
-	//for i, track := range c.tracks {
-	//	k := "track:" + strconv.Itoa(i+1)
-	//	if track.MimeType() == streamer.MimeTypeH264 {
-	//		v[k] = h264.Describe(track.Caps())
-	//	} else {
-	//		v[k] = track.MimeType()
-	//	}
-	//}
-
 	return json.Marshal(info)
 }

pkg/rtsp/rtsp_test.go

@@ -1,8 +1,8 @@
 package rtsp
 
 import (
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/stretchr/testify/assert"
 	"strings"
 	"testing"
@@ -131,7 +131,7 @@ a=appversion:1.0
 	assert.Nil(t, err)
 
 	codec := medias[0].Codecs[0]
-	assert.Equal(t, streamer.CodecH264, codec.Name)
+	assert.Equal(t, core.CodecH264, codec.Name)
 
 	sps, _ := h264.GetParameterSet(codec.FmtpLine)
 	assert.Nil(t, sps)

pkg/rtsp/server.go

@@ -4,7 +4,7 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"net"
 	"net/url"
@@ -14,7 +14,6 @@ import (
 func NewServer(conn net.Conn) *Conn {
 	c := new(Conn)
 	c.conn = conn
-	c.mode = ModeServerUnknown
 	c.reader = bufio.NewReader(conn)
 	return c
 }
@@ -24,8 +23,6 @@ func (c *Conn) Auth(username, password string) {
 	c.auth = tcp.NewAuth(info)
 }
 
-const transport = "RTP/AVP/TCP;unicast;interleaved="
-
 func (c *Conn) Accept() error {
 	for {
 		req, err := tcp.ReadRequest(c.reader)
@@ -76,14 +73,13 @@ func (c *Conn) Accept() error {
 			}
 
 			// TODO: fix someday...
-			c.channels = map[byte]*streamer.Track{}
 			for i, media := range c.Medias {
-				track := streamer.NewTrack(media, nil)
-				c.tracks = append(c.tracks, track)
-				c.channels[byte(i<<1)] = track
+				track := core.NewReceiver(media, media.Codecs[0])
+				track.ID = byte(i * 2)
+				c.receivers = append(c.receivers, track)
 			}
 
-			c.mode = ModeServerProducer
+			c.mode = core.ModePassiveProducer
 			c.Fire(MethodAnnounce)
 
 			res := &tcp.Response{Request: req}
@@ -92,10 +88,10 @@ func (c *Conn) Accept() error {
 			}
 
 		case MethodDescribe:
-			c.mode = ModeServerConsumer
+			c.mode = core.ModePassiveConsumer
 			c.Fire(MethodDescribe)
 
-			if c.tracks == nil {
+			if c.senders == nil {
 				res := &tcp.Response{
 					Status:  "404 Not Found",
 					Request: req,
@@ -111,17 +107,17 @@ func (c *Conn) Accept() error {
 			}
 
 			// convert tracks to real output medias medias
-			var medias []*streamer.Media
-			for _, track := range c.tracks {
-				media := &streamer.Media{
-					Kind:      streamer.GetKind(track.Codec.Name),
-					Direction: streamer.DirectionSendonly,
-					Codecs:    []*streamer.Codec{track.Codec},
+			var medias []*core.Media
+			for _, track := range c.senders {
+				media := &core.Media{
+					Kind:      core.GetKind(track.Codec.Name),
+					Direction: core.DirectionRecvonly,
+					Codecs:    []*core.Codec{track.Codec},
 				}
 				medias = append(medias, media)
 			}
 
-			res.Body, err = streamer.MarshalSDP(c.SessionName, medias)
+			res.Body, err = core.MarshalSDP(c.SessionName, medias)
 			if err != nil {
 				return err
 			}
@@ -138,6 +134,7 @@ func (c *Conn) Accept() error {
 				Request: req,
 			}
 
+			const transport = "RTP/AVP/TCP;unicast;interleaved="
 			if strings.HasPrefix(tr, transport) {
 				c.Session = "1" // TODO: fixme
 				c.state = StateSetup

pkg/srtp/session.go

@@ -1,7 +1,7 @@
 package srtp
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/rtcp"
 	"github.com/pion/rtp"
 	"github.com/pion/srtp/v2"
@@ -16,7 +16,7 @@ type Session struct {
 	remoteCtx *srtp.Context // read context
 
 	Write func(b []byte) (int, error)
-	Track *streamer.Track
+	Track *core.Receiver
 	Recv  uint32
 
 	lastSequence  uint32
@@ -82,7 +82,7 @@ func (s *Session) HandleRTP(data []byte) (err error) {
 	s.lastTimestamp = packet.Timestamp
 	s.lastTime = now
 
-	_ = s.Track.WriteRTP(packet)
+	s.Track.WriteRTP(packet)
 
 	return
 }

pkg/streamer/helpers.go

@@ -1,104 +0,0 @@
-package streamer
-
-import (
-	"strings"
-	"time"
-)
-
-type Mode byte
-
-const (
-	ModeActiveProducer Mode = iota + 1 // typical source (client)
-	ModePassiveConsumer
-	ModePassiveProducer
-	ModeActiveConsumer
-)
-
-func (m Mode) String() string {
-	switch m {
-	case ModeActiveProducer:
-		return "active producer"
-	case ModePassiveConsumer:
-		return "passive consumer"
-	case ModePassiveProducer:
-		return "passive producer"
-	case ModeActiveConsumer:
-		return "active consumer"
-	}
-	return "unknown"
-}
-
-type Info struct {
-	Type       string   `json:"type,omitempty"`
-	URL        string   `json:"url,omitempty"`
-	RemoteAddr string   `json:"remote_addr,omitempty"`
-	UserAgent  string   `json:"user_agent,omitempty"`
-	Medias     []*Media `json:"medias,omitempty"`
-	Tracks     []*Track `json:"tracks,omitempty"`
-	Recv       uint32   `json:"recv,omitempty"`
-	Send       uint32   `json:"send,omitempty"`
-}
-
-func Between(s, sub1, sub2 string) string {
-	i := strings.Index(s, sub1)
-	if i < 0 {
-		return ""
-	}
-	s = s[i+len(sub1):]
-
-	if len(sub2) == 1 {
-		i = strings.IndexByte(s, sub2[0])
-	} else {
-		i = strings.Index(s, sub2)
-	}
-	if i >= 0 {
-		return s[:i]
-	}
-
-	return s
-}
-
-func Contains(medias []*Media, media *Media, codec *Codec) bool {
-	var ok1, ok2 bool
-	for _, m := range medias {
-		if m == media {
-			ok1 = true
-			break
-		}
-	}
-	for _, c := range media.Codecs {
-		if c == codec {
-			ok2 = true
-			break
-		}
-	}
-	return ok1 && ok2
-}
-
-type Probe struct {
-	deadline time.Time
-	items    map[interface{}]struct{}
-}
-
-func NewProbe(enable bool) *Probe {
-	if enable {
-		return &Probe{
-			deadline: time.Now().Add(time.Second * 3),
-			items:    map[interface{}]struct{}{},
-		}
-	} else {
-		return nil
-	}
-}
-
-// Active return true if probe enabled and not finish
-func (p *Probe) Active() bool {
-	return len(p.items) < 2 && time.Now().Before(p.deadline)
-}
-
-// Append safe to run if Probe is nil
-func (p *Probe) Append(v interface{}) {
-	if p != nil {
-		p.items[v] = struct{}{}
-	}
-}

pkg/streamer/media.go

@@ -1,352 +0,0 @@
-package streamer
-
-import (
-	"encoding/json"
-	"fmt"
-	"github.com/pion/sdp/v3"
-	"strconv"
-	"strings"
-	"unicode"
-)
-
-const (
-	DirectionRecvonly = "recvonly"
-	DirectionSendonly = "sendonly"
-	DirectionSendRecv = "sendrecv"
-)
-
-const (
-	KindVideo = "video"
-	KindAudio = "audio"
-)
-
-const (
-	CodecH264 = "H264" // payloadType: 96
-	CodecH265 = "H265"
-	CodecVP8  = "VP8"
-	CodecVP9  = "VP9"
-	CodecAV1  = "AV1"
-	CodecJPEG = "JPEG" // payloadType: 26
-
-	CodecPCMU = "PCMU" // payloadType: 0
-	CodecPCMA = "PCMA" // payloadType: 8
-	CodecAAC  = "MPEG4-GENERIC"
-	CodecOpus = "OPUS" // payloadType: 111
-	CodecG722 = "G722"
-	CodecMP3  = "MPA" // payload: 14, aka MPEG-1 Layer III
-
-	CodecELD = "ELD" // AAC-ELD
-
-	CodecAll = "ALL"
-	CodecAny = "ANY"
-)
-
-const PayloadTypeRAW byte = 255
-
-func GetKind(name string) string {
-	switch name {
-	case CodecH264, CodecH265, CodecVP8, CodecVP9, CodecAV1, CodecJPEG:
-		return KindVideo
-	case CodecPCMU, CodecPCMA, CodecAAC, CodecOpus, CodecG722, CodecMP3, CodecELD:
-		return KindAudio
-	}
-	return ""
-}
-
-// Media take best from:
-// - deepch/vdk/format/rtsp/sdp.Media
-// - pion/sdp.MediaDescription
-type Media struct {
-	Kind      string   `json:"kind,omitempty"` // video or audio
-	Direction string   `json:"direction,omitempty"`
-	Codecs    []*Codec `json:"codecs,omitempty"`
-
-	MID     string `json:"mid,omitempty"`     // TODO: fixme?
-	Control string `json:"control,omitempty"` // TODO: fixme?
-}
-
-func (m *Media) String() string {
-	s := fmt.Sprintf("%s, %s", m.Kind, m.Direction)
-	for _, codec := range m.Codecs {
-		s += ", " + codec.String()
-	}
-	return s
-}
-
-func (m *Media) MarshalJSON() ([]byte, error) {
-	return json.Marshal(m.String())
-}
-
-func (m *Media) Clone() *Media {
-	clone := &Media{
-		Kind:      m.Kind,
-		Direction: m.Direction,
-		Codecs:    make([]*Codec, len(m.Codecs)),
-		MID:       m.MID,
-		Control:   m.Control,
-	}
-	for i, codec := range m.Codecs {
-		clone.Codecs[i] = codec.Clone()
-	}
-	return clone
-}
-
-func (m *Media) AV() bool {
-	return m.Kind == KindVideo || m.Kind == KindAudio
-}
-
-func (m *Media) MatchCodec(codec *Codec) *Codec {
-	for _, c := range m.Codecs {
-		if c.Match(codec) {
-			return c
-		}
-	}
-	return nil
-}
-
-func (m *Media) MatchMedia(media *Media) *Codec {
-	if m.Kind != media.Kind {
-		return nil
-	}
-
-	switch m.Direction {
-	case DirectionSendonly:
-		if media.Direction != DirectionRecvonly {
-			return nil
-		}
-	case DirectionRecvonly:
-		if media.Direction != DirectionSendonly {
-			return nil
-		}
-	default:
-		panic("wrong direction")
-	}
-
-	for _, localCodec := range m.Codecs {
-		for _, remoteCodec := range media.Codecs {
-			if localCodec.Match(remoteCodec) {
-				return localCodec
-			}
-		}
-	}
-	return nil
-}
-
-func (m *Media) MatchAll() bool {
-	return len(m.Codecs) > 0 && m.Codecs[0].Name == CodecAll
-}
-
-// Codec take best from:
-// - deepch/vdk/av.CodecData
-// - pion/webrtc.RTPCodecCapability
-type Codec struct {
-	Name        string // H264, PCMU, PCMA, opus...
-	ClockRate   uint32 // 90000, 8000, 16000...
-	Channels    uint16 // 0, 1, 2
-	FmtpLine    string
-	PayloadType uint8
-}
-
-func (c *Codec) String() string {
-	s := fmt.Sprintf("%d %s", c.PayloadType, c.Name)
-	if c.ClockRate != 90000 {
-		s = fmt.Sprintf("%s/%d", s, c.ClockRate)
-	}
-	if c.Channels > 0 {
-		s = fmt.Sprintf("%s/%d", s, c.Channels)
-	}
-	return s
-}
-
-func (c *Codec) IsRTP() bool {
-	return c.PayloadType != PayloadTypeRAW
-}
-
-func (c *Codec) Clone() *Codec {
-	clone := *c
-	return &clone
-}
-
-func (c *Codec) Match(codec *Codec) bool {
-	switch codec.Name {
-	case CodecAll, CodecAny:
-		return true
-	}
-
-	return c.Name == codec.Name &&
-		(c.ClockRate == codec.ClockRate || codec.ClockRate == 0) &&
-		(c.Channels == codec.Channels || codec.Channels == 0)
-}
-
-func UnmarshalMedias(descriptions []*sdp.MediaDescription) (medias []*Media) {
-	for _, md := range descriptions {
-		media := UnmarshalMedia(md)
-
-		if media.Direction == DirectionSendRecv {
-			media.Direction = DirectionRecvonly
-			medias = append(medias, media)
-
-			media = media.Clone()
-			media.Direction = DirectionSendonly
-		}
-
-		medias = append(medias, media)
-	}
-
-	return
-}
-
-func MarshalSDP(name string, medias []*Media) ([]byte, error) {
-	sd := &sdp.SessionDescription{
-		Origin: sdp.Origin{
-			Username: "-", SessionID: 1, SessionVersion: 1,
-			NetworkType: "IN", AddressType: "IP4", UnicastAddress: "0.0.0.0",
-		},
-		SessionName: sdp.SessionName(name),
-		ConnectionInformation: &sdp.ConnectionInformation{
-			NetworkType: "IN", AddressType: "IP4", Address: &sdp.Address{
-				Address: "0.0.0.0",
-			},
-		},
-		TimeDescriptions: []sdp.TimeDescription{
-			{Timing: sdp.Timing{}},
-		},
-	}
-
-	payloadType := uint8(96)
-
-	for _, media := range medias {
-		if media.Codecs == nil {
-			continue
-		}
-
-		codec := media.Codecs[0]
-
-		name := codec.Name
-		if name == CodecELD {
-			name = CodecAAC
-		}
-
-		md := &sdp.MediaDescription{
-			MediaName: sdp.MediaName{
-				Media:  media.Kind,
-				Protos: []string{"RTP", "AVP"},
-			},
-		}
-		md.WithCodec(payloadType, name, codec.ClockRate, codec.Channels, codec.FmtpLine)
-
-		sd.MediaDescriptions = append(sd.MediaDescriptions, md)
-
-		payloadType++
-	}
-
-	return sd.Marshal()
-}
-
-func UnmarshalMedia(md *sdp.MediaDescription) *Media {
-	m := &Media{
-		Kind: md.MediaName.Media,
-	}
-
-	for _, attr := range md.Attributes {
-		switch attr.Key {
-		case DirectionSendonly, DirectionRecvonly, DirectionSendRecv:
-			m.Direction = attr.Key
-		case "control":
-			m.Control = attr.Value
-		case "mid":
-			m.MID = attr.Value
-		}
-	}
-
-	for _, format := range md.MediaName.Formats {
-		m.Codecs = append(m.Codecs, UnmarshalCodec(md, format))
-	}
-
-	return m
-}
-
-func UnmarshalCodec(md *sdp.MediaDescription, payloadType string) *Codec {
-	c := &Codec{PayloadType: byte(atoi(payloadType))}
-
-	for _, attr := range md.Attributes {
-		switch {
-		case c.Name == "" && attr.Key == "rtpmap" && strings.HasPrefix(attr.Value, payloadType):
-			i := strings.IndexByte(attr.Value, ' ')
-			ss := strings.Split(attr.Value[i+1:], "/")
-
-			c.Name = strings.ToUpper(ss[0])
-			// fix tailing space: `a=rtpmap:96 H264/90000 `
-			c.ClockRate = uint32(atoi(strings.TrimRightFunc(ss[1], unicode.IsSpace)))
-
-			if len(ss) == 3 && ss[2] == "2" {
-				c.Channels = 2
-			}
-		case c.FmtpLine == "" && attr.Key == "fmtp" && strings.HasPrefix(attr.Value, payloadType):
-			if i := strings.IndexByte(attr.Value, ' '); i > 0 {
-				c.FmtpLine = attr.Value[i+1:]
-			}
-		}
-	}
-
-	if c.Name == "" {
-		// https://en.wikipedia.org/wiki/RTP_payload_formats
-		switch payloadType {
-		case "0":
-			c.Name = CodecPCMU
-			c.ClockRate = 8000
-		case "8":
-			c.Name = CodecPCMA
-			c.ClockRate = 8000
-		case "14":
-			c.Name = CodecMP3
-			c.ClockRate = 44100
-		case "26":
-			c.Name = CodecJPEG
-			c.ClockRate = 90000
-		default:
-			c.Name = payloadType
-		}
-	}
-
-	return c
-}
-
-func ParseQuery(query map[string][]string) (medias []*Media) {
-	// set media candidates from query list
-	for key, values := range query {
-		switch key {
-		case KindVideo, KindAudio:
-			for _, value := range values {
-				media := &Media{Kind: key, Direction: DirectionRecvonly}
-
-				for _, name := range strings.Split(value, ",") {
-					name = strings.ToUpper(name)
-
-					// check aliases
-					switch name {
-					case "", "COPY":
-						name = CodecAny
-					case "MJPEG":
-						name = CodecJPEG
-					case "AAC":
-						name = CodecAAC
-					case "MP3":
-						name = CodecMP3
-					}
-
-					media.Codecs = append(media.Codecs, &Codec{Name: name})
-				}
-
-				medias = append(medias, media)
-			}
-		}
-	}
-
-	return
-}
-
-func atoi(s string) (i int) {
-	i, _ = strconv.Atoi(s)
-	return
-}

pkg/streamer/streamer.go

@@ -1,67 +0,0 @@
-// Package streamer
-//
-// 1. Consumer.GetMedias - return list of Media, that Consumer can play/load/consume:
-//   - Media with DirectionRecvonly for audio/video
-//   - Media with DirectionSendonly for backchannel
-//
-// 2. Producer.GetMedias - return list of Media, that Producer can generate/create/produce
-//   - Media with DirectionSendonly for audio/video
-//   - Media with DirectionRecvonly for backchannel
-//
-// 3. Producer.GetTrack - get Media from Producer and Codec from that Media return Track from Producer:
-//   - Media with DirectionSendonly should Track.WriteRTP after Producer.Start
-//   - Media with DirectionRecvonly should Track.Bind and wait Track.WriteRTP from Consumer
-//
-// 4. Consumer.AddTrack - takes Media from Consumer and Track from Producer:
-//   - Media with DirectionRecvonly should Track.WriteRTP
-//   - Media with DirectionSendonly should Track.Bind
-//
-// 5. Producer.Start - run loop with reading rtp.Packet from source
-package streamer
-
-// States, Queries and Events
-
-type EventType byte
-
-const (
-	StateNull EventType = iota
-	StateReady
-	StatePaused
-	StatePlaying
-)
-
-// Element base struct for all classes with support feedback
-type Element struct {
-	events []EventFunc
-}
-
-type EventFunc func(msg interface{})
-
-func (e *Element) Listen(f EventFunc) {
-	e.events = append(e.events, f)
-}
-
-func (e *Element) Fire(msg interface{}) {
-	for _, f := range e.events {
-		f(msg)
-	}
-}
-
-func (e *Element) Push(msg interface{}) {
-}
-
-// Producer and Consumer interfaces
-
-type Producer interface {
-	Listen(f EventFunc)
-	GetMedias() []*Media
-	GetTrack(media *Media, codec *Codec) *Track
-	Start() error
-	Stop() error
-}
-
-type Consumer interface {
-	Listen(f EventFunc)
-	GetMedias() []*Media
-	AddTrack(media *Media, track *Track) *Track
-}

pkg/streamer/track.go

@@ -1,89 +0,0 @@
-package streamer
-
-import (
-	"encoding/json"
-	"fmt"
-	"github.com/pion/rtp"
-	"sync"
-)
-
-type WriterFunc func(packet *rtp.Packet) error
-type WrapperFunc func(push WriterFunc) WriterFunc
-
-type Track struct {
-	Codec     *Codec
-	Direction string
-	sink      map[*Track]WriterFunc
-	sinkMu    *sync.RWMutex
-}
-
-func NewTrack(media *Media, codec *Codec) *Track {
-	if codec == nil {
-		codec = media.Codecs[0]
-	}
-	return &Track{Codec: codec, Direction: media.Direction, sinkMu: new(sync.RWMutex)}
-}
-
-func (t *Track) String() string {
-	s := t.Codec.String()
-	if t.Codec.FmtpLine != "" {
-		s += " " + t.Codec.FmtpLine
-	}
-	if t.sinkMu.TryRLock() {
-		s += fmt.Sprintf(", sinks=%d", len(t.sink))
-		t.sinkMu.RUnlock()
-	} else {
-		s += fmt.Sprintf(", sinks=?")
-	}
-	return s
-}
-
-func (t *Track) MarshalJSON() ([]byte, error) {
-	return json.Marshal(t.String())
-}
-
-func (t *Track) WriteRTP(p *rtp.Packet) error {
-	t.sinkMu.RLock()
-	for _, f := range t.sink {
-		_ = f(p)
-	}
-	t.sinkMu.RUnlock()
-	return nil
-}
-
-// Bind - attach WriterFunc (Consumer) for receiving rtp.Packet(s)
-// and return new Track copy. Later you can run Unbind for new Track
-func (t *Track) Bind(w WriterFunc) *Track {
-	t.sinkMu.Lock()
-
-	if t.sink == nil {
-		t.sink = map[*Track]WriterFunc{}
-	}
-
-	clone := *t
-	t.sink[&clone] = w
-
-	t.sinkMu.Unlock()
-
-	return &clone
-}
-
-// Unbind - detach WriterFunc that related to this Track from
-// consuming track data
-func (t *Track) Unbind() {
-	t.sinkMu.Lock()
-	delete(t.sink, t)
-	t.sinkMu.Unlock()
-}
-
-func (t *Track) GetSink(from *Track) {
-	t.sinkMu.Lock()
-	t.sink = from.sink
-	t.sinkMu.Unlock()
-}
-
-func (t *Track) HasSink() bool {
-	t.sinkMu.RLock()
-	defer t.sinkMu.RUnlock()
-	return len(t.sink) > 0
-}

pkg/tapo/backchannel.go

@@ -1,53 +0,0 @@
-package tapo
-
-import (
-	"bytes"
-	"github.com/AlexxIT/go2rtc/pkg/mpegts"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
-	"github.com/pion/rtp"
-	"strconv"
-)
-
-func (c *Client) backchannelWriter() streamer.WriterFunc {
-	w := mpegts.NewWriter()
-	w.AddPES(68, mpegts.StreamTypePCMATapo)
-	w.WritePAT()
-	w.WritePMT()
-
-	return func(packet *rtp.Packet) (err error) {
-		// don't know why 68 and 192
-		w.WritePES(68, 192, packet.Payload)
-		err = c.WriteBackchannel(w.Bytes())
-		w.Reset()
-		return
-	}
-}
-
-func (c *Client) SetupBackchannel() (err error) {
-	// if conn1 is not used - we will use it for backchannel
-	// or we need to start another conn for session2
-	if c.session1 != "" {
-		if c.conn2, err = c.newConn(); err != nil {
-			return
-		}
-	} else {
-		c.conn2 = c.conn1
-	}
-
-	c.session2, err = c.Request(c.conn2, []byte(`{"params":{"talk":{"mode":"aec"},"method":"get"},"seq":3,"type":"request"}`))
-	return
-}
-
-func (c *Client) WriteBackchannel(body []byte) (err error) {
-	// TODO: fixme (size)
-	buf := bytes.NewBuffer(nil)
-	buf.WriteString("----client-stream-boundary--\r\n")
-	buf.WriteString("Content-Type: audio/mp2t\r\n")
-	buf.WriteString("X-If-Encrypt: 0\r\n")
-	buf.WriteString("X-Session-Id: " + c.session2 + "\r\n")
-	buf.WriteString("Content-Length: " + strconv.Itoa(len(body)) + "\r\n\r\n")
-	buf.Write(body)
-
-	_, err = buf.WriteTo(c.conn2)
-	return
-}

pkg/tapo/client.go

@@ -8,8 +8,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mpegts"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"mime/multipart"
 	"net"
@@ -19,12 +19,13 @@ import (
 )
 
 type Client struct {
-	streamer.Element
+	core.Listener
 
 	url string
 
-	medias []*streamer.Media
-	tracks map[byte]*streamer.Track
+	medias    []*core.Media
+	receivers []*core.Receiver
+	sender    *core.Sender
 
 	conn1 net.Conn
 	conn2 net.Conn
@@ -33,6 +34,9 @@ type Client struct {
 
 	session1 string
 	session2 string
+
+	recv int
+	send int
 }
 
 // block ciphers using cipher block chaining.
@@ -102,7 +106,7 @@ func (c *Client) newDectypter(res *http.Response, username, password string) {
 	// extract nonce from response
 	// cipher="AES_128_CBC" username="admin" padding="PKCS7_16" algorithm="MD5" nonce="***"
 	nonce := res.Header.Get("Key-Exchange")
-	nonce = streamer.Between(nonce, `nonce="`, `"`)
+	nonce = core.Between(nonce, `nonce="`, `"`)
 
 	key := md5.Sum([]byte(nonce + ":" + password))
 	iv := md5.Sum([]byte(username + ":" + nonce))
@@ -158,6 +162,8 @@ func (c *Client) Handle() error {
 			return err
 		}
 
+		c.recv += size
+
 		body := make([]byte, size)
 
 		b := body
@@ -178,8 +184,11 @@ func (c *Client) Handle() error {
 				break
 			}
 
-			if track := c.tracks[pkt.PayloadType]; track != nil {
-				_ = track.WriteRTP(pkt)
+			for _, receiver := range c.receivers {
+				if receiver.ID == pkt.PayloadType {
+					receiver.WriteRTP(pkt)
+					break
+				}
 			}
 		}
 	}

pkg/tapo/consumer.go

@@ -1,18 +1,62 @@
 package tapo
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"bytes"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/mpegts"
 	"github.com/pion/rtp"
+	"strconv"
 )
 
-func (c *Client) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	consCodec := media.MatchCodec(track.Codec)
-	consTrack := c.GetTrack(media, consCodec)
-	if consTrack == nil {
-		return nil
+func (c *Client) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
+	if c.sender == nil {
+		if err := c.SetupBackchannel(); err != nil {
+			return nil
+		}
+
+		w := mpegts.NewWriter()
+		w.AddPES(68, mpegts.StreamTypePCMATapo)
+		w.WritePAT()
+		w.WritePMT()
+
+		c.sender = core.NewSender(media, track.Codec)
+		c.sender.Handler = func(packet *rtp.Packet) {
+			// don't know why 68 and 192
+			w.WritePES(68, 192, packet.Payload)
+			_ = c.WriteBackchannel(w.Bytes())
+			w.Reset()
+		}
 	}
 
-	return track.Bind(func(packet *rtp.Packet) error {
-		return consTrack.WriteRTP(packet)
-	})
+	c.sender.HandleRTP(track)
+	return nil
+}
+
+func (c *Client) SetupBackchannel() (err error) {
+	// if conn1 is not used - we will use it for backchannel
+	// or we need to start another conn for session2
+	if c.session1 != "" {
+		if c.conn2, err = c.newConn(); err != nil {
+			return
+		}
+	} else {
+		c.conn2 = c.conn1
+	}
+
+	c.session2, err = c.Request(c.conn2, []byte(`{"params":{"talk":{"mode":"aec"},"method":"get"},"seq":3,"type":"request"}`))
+	return
+}
+
+func (c *Client) WriteBackchannel(body []byte) (err error) {
+	// TODO: fixme (size)
+	buf := bytes.NewBuffer(nil)
+	buf.WriteString("----client-stream-boundary--\r\n")
+	buf.WriteString("Content-Type: audio/mp2t\r\n")
+	buf.WriteString("X-If-Encrypt: 0\r\n")
+	buf.WriteString("X-Session-Id: " + c.session2 + "\r\n")
+	buf.WriteString("Content-Length: " + strconv.Itoa(len(body)) + "\r\n\r\n")
+	buf.Write(body)
+
+	_, err = buf.WriteTo(c.conn2)
+	return
 }

pkg/tapo/producer.go

@@ -1,34 +1,34 @@
 package tapo
 
 import (
+	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mpegts"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 )
 
-func (c *Client) GetMedias() []*streamer.Media {
-	// producer should have persistent medias
+func (c *Client) GetMedias() []*core.Media {
 	if c.medias == nil {
 		// don't know if all Tapo has this capabilities...
-		c.medias = []*streamer.Media{
+		c.medias = []*core.Media{
 			{
-				Kind:      streamer.KindVideo,
-				Direction: streamer.DirectionSendonly,
-				Codecs: []*streamer.Codec{
-					{Name: streamer.CodecH264, ClockRate: 90000, PayloadType: streamer.PayloadTypeRAW},
+				Kind:      core.KindVideo,
+				Direction: core.DirectionRecvonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecH264, ClockRate: 90000, PayloadType: core.PayloadTypeRAW},
 				},
 			},
 			{
-				Kind:      streamer.KindAudio,
-				Direction: streamer.DirectionSendonly,
-				Codecs: []*streamer.Codec{
-					{Name: streamer.CodecPCMA, ClockRate: 8000, PayloadType: 8},
+				Kind:      core.KindAudio,
+				Direction: core.DirectionRecvonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecPCMA, ClockRate: 8000, PayloadType: 8},
 				},
 			},
 			{
-				Kind:      streamer.KindAudio,
-				Direction: streamer.DirectionRecvonly,
-				Codecs: []*streamer.Codec{
-					{Name: streamer.CodecPCMA, ClockRate: 8000, PayloadType: 8},
+				Kind:      core.KindAudio,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecPCMA, ClockRate: 8000, PayloadType: 8},
 				},
 			},
 		}
@@ -37,44 +37,26 @@ func (c *Client) GetMedias() []*streamer.Media {
 	return c.medias
 }
 
-func (c *Client) GetTrack(media *streamer.Media, codec *streamer.Codec) (track *streamer.Track) {
-	for _, track := range c.tracks {
+func (c *Client) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	for _, track := range c.receivers {
 		if track.Codec == codec {
-			return track
+			return track, nil
 		}
 	}
 
-	if c.tracks == nil {
-		c.tracks = map[byte]*streamer.Track{}
+	if err := c.SetupStream(); err != nil {
+		return nil, err
 	}
 
-	if media.Direction == streamer.DirectionSendonly {
-		var payloadType byte
-		if media.Kind == streamer.KindVideo {
-			payloadType = mpegts.StreamTypeH264
-		} else {
-			payloadType = mpegts.StreamTypePCMATapo
-		}
-
-		if err := c.SetupStream(); err != nil {
-			return nil
-		}
-
-		track = streamer.NewTrack(media, codec)
-		c.tracks[payloadType] = track
-	} else {
-		if err := c.SetupBackchannel(); err != nil {
-			return nil
-		}
-
-		if w := c.backchannelWriter(); w != nil {
-			track = streamer.NewTrack(media, codec)
-			track.Bind(w)
-			c.tracks[0] = track
-		}
+	track := core.NewReceiver(media, codec)
+	switch media.Kind {
+	case core.KindVideo:
+		track.ID = mpegts.StreamTypeH264
+	case core.KindAudio:
+		track.ID = mpegts.StreamTypePCMATapo
 	}
-
-	return
+	c.receivers = append(c.receivers, track)
+	return track, nil
 }
 
 func (c *Client) Start() error {
@@ -82,5 +64,25 @@ func (c *Client) Start() error {
 }
 
 func (c *Client) Stop() error {
+	for _, receiver := range c.receivers {
+		receiver.Close()
+	}
+	if c.sender != nil {
+		c.sender.Close()
+	}
 	return c.Close()
 }
+
+func (c *Client) MarshalJSON() ([]byte, error) {
+	info := &core.Info{
+		Type:      "Tapo active producer",
+		Medias:    c.medias,
+		Recv:      c.recv,
+		Receivers: c.receivers,
+		Send:      c.send,
+	}
+	if c.sender != nil {
+		info.Senders = []*core.Sender{c.sender}
+	}
+	return json.Marshal(info)
+}

pkg/tcp/server.go

@@ -1,36 +0,0 @@
-package tcp
-
-import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
-	"net"
-)
-
-type Server struct {
-	streamer.Element
-
-	listener net.Listener
-	closed   bool
-}
-
-func NewServer(address string) (srv *Server, err error) {
-	srv = &Server{}
-	srv.listener, err = net.Listen("tcp", address)
-	return
-}
-
-func (s *Server) Serve() {
-	for {
-		conn, err := s.listener.Accept()
-		if err != nil {
-			return
-		}
-		go func() {
-			s.Fire(conn)
-			_ = conn.Close()
-		}()
-	}
-}
-
-func (s *Server) Close() error {
-	return s.listener.Close()
-}

pkg/webrtc/api.go

@@ -8,6 +8,9 @@ import (
 	"strings"
 )
 
+// ReceiveMTU = Ethernet MTU (1500) - IP Header (20) - UDP Header (8)
+const ReceiveMTU = 1472
+
 func NewAPI(address string) (*webrtc.API, error) {
 	// for debug logs add to env: `PION_LOG_DEBUG=all`
 	m := &webrtc.MediaEngine{}
@@ -41,8 +44,7 @@ func NewAPI(address string) (*webrtc.API, error) {
 	// fix https://github.com/pion/webrtc/pull/2407
 	s.SetDTLSInsecureSkipHelloVerify(true)
 
-	// Ethernet MTU (1500) - IP Header (20) - UDP Header (8)
-	s.SetReceiveMTU(1472)
+	s.SetReceiveMTU(ReceiveMTU)
 
 	if address != "" {
 		address, network, _ := strings.Cut(address, "/")

pkg/webrtc/client.go

@@ -1,27 +1,27 @@
 package webrtc
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/sdp/v3"
 	"github.com/pion/webrtc/v3"
 )
 
-func (c *Conn) CreateOffer(medias []*streamer.Media) (string, error) {
+func (c *Conn) CreateOffer(medias []*core.Media) (string, error) {
 	// 1. Create transeivers with proper kind and direction
 	for _, media := range medias {
 		var err error
 		switch media.Direction {
-		case streamer.DirectionRecvonly:
+		case core.DirectionRecvonly:
 			_, err = c.pc.AddTransceiverFromKind(
 				webrtc.NewRTPCodecType(media.Kind),
 				webrtc.RTPTransceiverInit{Direction: webrtc.RTPTransceiverDirectionRecvonly},
 			)
-		case streamer.DirectionSendonly:
+		case core.DirectionSendonly:
 			_, err = c.pc.AddTransceiverFromTrack(
 				NewTrack(media.Kind),
 				webrtc.RTPTransceiverInit{Direction: webrtc.RTPTransceiverDirectionSendonly},
 			)
-		case streamer.DirectionSendRecv:
+		case core.DirectionSendRecv:
 			// default transceiver is sendrecv
 			_, err = c.pc.AddTransceiverFromTrack(NewTrack(media.Kind))
 		}
@@ -45,7 +45,7 @@ func (c *Conn) CreateOffer(medias []*streamer.Media) (string, error) {
 	return c.pc.LocalDescription().SDP, nil
 }
 
-func (c *Conn) CreateCompleteOffer(medias []*streamer.Media) (string, error) {
+func (c *Conn) CreateCompleteOffer(medias []*core.Media) (string, error) {
 	if _, err := c.CreateOffer(medias); err != nil {
 		return "", err
 	}
@@ -68,21 +68,7 @@ func (c *Conn) SetAnswer(answer string) (err error) {
 		return
 	}
 
-	medias := streamer.UnmarshalMedias(sd.MediaDescriptions)
-
-	// sort medias, so video will always be before audio
-	// and ignore application media from Hass default lovelace card
-	// ignore media without direction (inactive media)
-	for _, media := range medias {
-		if media.Kind == streamer.KindVideo && media.Direction != "" {
-			c.medias = append(c.medias, media)
-		}
-	}
-	for _, media := range medias {
-		if media.Kind == streamer.KindAudio && media.Direction != "" {
-			c.medias = append(c.medias, media)
-		}
-	}
+	c.medias = UnmarshalMedias(sd.MediaDescriptions)
 
 	return nil
 }

pkg/webrtc/client_test.go

@@ -1,7 +1,7 @@
 package webrtc
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/webrtc/v3"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -17,10 +17,10 @@ func TestClient(t *testing.T) {
 
 	prod := NewConn(pc)
 
-	medias := []*streamer.Media{
-		{Kind: streamer.KindVideo, Direction: streamer.DirectionRecvonly},
-		{Kind: streamer.KindAudio, Direction: streamer.DirectionRecvonly},
-		{Kind: streamer.KindAudio, Direction: streamer.DirectionSendonly},
+	medias := []*core.Media{
+		{Kind: core.KindVideo, Direction: core.DirectionRecvonly},
+		{Kind: core.KindAudio, Direction: core.DirectionRecvonly},
+		{Kind: core.KindAudio, Direction: core.DirectionSendonly},
 	}
 
 	offer, err := prod.CreateOffer(medias)

pkg/webrtc/conn.go

@@ -2,9 +2,6 @@ package webrtc
 
 import (
 	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/h264"
-	"github.com/AlexxIT/go2rtc/pkg/h265"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
 	"github.com/pion/rtcp"
 	"github.com/pion/rtp"
 	"github.com/pion/webrtc/v3"
@@ -12,19 +9,20 @@ import (
 )
 
 type Conn struct {
-	streamer.Element
+	core.Listener
 
 	UserAgent string
 	Desc      string
-	Mode      streamer.Mode
+	Mode      core.Mode
 
 	pc *webrtc.PeerConnection
 
-	medias []*streamer.Media
-	tracks []*streamer.Track
+	medias    []*core.Media
+	receivers []*core.Receiver
+	senders   []*core.Sender
 
-	receive int
-	send    int
+	recv int
+	send int
 
 	offer  string
 	remote string
@@ -56,13 +54,26 @@ func NewConn(pc *webrtc.PeerConnection) *Conn {
 		)
 	})
 
-	pc.OnTrack(func(remote *webrtc.TrackRemote, _ *webrtc.RTPReceiver) {
-		track := c.getRecvTrack(remote)
-		if track == nil {
-			return // it's OK when we not need, for example, audio from producer
+	pc.OnTrack(func(remote *webrtc.TrackRemote, receiver *webrtc.RTPReceiver) {
+		media, codec := c.getMediaCodec(remote)
+		if media == nil {
+			return
 		}
 
-		if c.Mode == streamer.ModePassiveProducer && remote.Kind() == webrtc.RTPCodecTypeVideo {
+		track, err := c.GetTrack(media, codec)
+		if err != nil {
+			return
+		}
+
+		switch c.Mode {
+		case core.ModePassiveProducer, core.ModeActiveProducer:
+			// replace the theoretical list of codecs with the actual list of codecs
+			if len(media.Codecs) > 1 {
+				media.Codecs = []*core.Codec{codec}
+			}
+		}
+
+		if c.Mode == core.ModePassiveProducer && remote.Kind() == webrtc.RTPCodecTypeVideo {
 			go func() {
 				pkts := []rtcp.Packet{&rtcp.PictureLossIndication{MediaSSRC: uint32(remote.SSRC())}}
 				for range time.NewTicker(time.Second * 2).C {
@@ -74,15 +85,20 @@ func NewConn(pc *webrtc.PeerConnection) *Conn {
 		}
 
 		for {
-			packet, _, err := remote.ReadRTP()
+			b := make([]byte, ReceiveMTU)
+			n, _, err := remote.Read(b)
 			if err != nil {
 				return
 			}
-			if len(packet.Payload) == 0 {
-				continue
+
+			c.recv += n
+
+			packet := &rtp.Packet{}
+			if err := packet.Unmarshal(b[:n]); err != nil {
+				return
 			}
-			c.receive += len(packet.Payload)
-			_ = track.WriteRTP(packet)
+
+			track.WriteRTP(packet)
 		}
 	})
 
@@ -127,106 +143,34 @@ func (c *Conn) getTranseiver(mid string) *webrtc.RTPTransceiver {
 	}
 	return nil
 }
-func (c *Conn) addSendTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	tr := c.getTranseiver(media.MID)
-	sender := tr.Sender()
-	localTrack := sender.Track().(*Track)
 
-	codec := track.Codec
-
-	// important to get remote PayloadType
-	payloadType := media.MatchCodec(codec).PayloadType
-
-	push := func(packet *rtp.Packet) error {
-		c.send += packet.MarshalSize()
-		return localTrack.WriteRTP(payloadType, packet)
-	}
-
-	switch codec.Name {
-	case streamer.CodecH264:
-		wrapper := h264.RTPPay(1200)
-		push = wrapper(push)
-
-		if codec.IsRTP() {
-			wrapper = h264.RTPDepay(track)
-		} else {
-			wrapper = h264.RepairAVC(track)
-		}
-		push = wrapper(push)
-
-	case streamer.CodecH265:
-		// SafariPay because it is the only browser in the world
-		// that supports WebRTC + H265
-		wrapper := h265.SafariPay(1200)
-		push = wrapper(push)
-
-		wrapper = h265.RTPDepay(track)
-		push = wrapper(push)
-	}
-
-	return track.Bind(push)
-}
-
-func (c *Conn) getRecvTrack(remote *webrtc.TrackRemote) *streamer.Track {
-	payloadType := uint8(remote.PayloadType())
-
-	switch c.Mode {
-	case streamer.ModePassiveConsumer:
-		// Situation:
-		// - Browser (passive consumer) connects to go2rtc for receiving AV from IP-camera
-		// - Video and audio tracks marked as local "sendonly"
-		// - Browser sends microphone remote track to go2rtc, this track marked as local "recvonly"
-		// - go2rtc should ReadRTP from this remote track and sends it to camera
-		for _, track := range c.tracks {
-			if track.Direction == streamer.DirectionRecvonly && track.Codec.PayloadType == payloadType {
-				return track
-			}
+func (c *Conn) getMediaCodec(remote *webrtc.TrackRemote) (*core.Media, *core.Codec) {
+	for _, tr := range c.pc.GetTransceivers() {
+		// search Transeiver for this TrackRemote
+		if tr.Receiver() == nil || tr.Receiver().Track() != remote {
+			continue
 		}
 
-	case streamer.ModeActiveProducer:
-		// Situation:
-		// - go2rtc (active producer) connects to remote server (ex. webtorrent) for receiving AV
-		// - remote server sends remote tracks, this tracks marked as remote "sendonly"
-		for _, track := range c.tracks {
-			if track.Direction == streamer.DirectionSendonly && track.Codec.PayloadType == payloadType {
-				return track
-			}
-		}
-
-	case streamer.ModePassiveProducer:
-		// Situation:
-		// - OBS Studio (passive producer) connects to go2rtc for send AV
-		// - OBS sends remote tracks, this tracks marked as remote "sendonly"
-		for i, media := range c.medias {
-			// check only tracks with same kind
-			if media.Kind != remote.Kind().String() {
-				continue
-			}
-
-			// check only incoming tracks (remote media "sendonly")
-			if media.Direction != streamer.DirectionSendonly {
+		// search Media for this MID
+		for _, media := range c.medias {
+			if media.ID != tr.Mid() || media.Direction != core.DirectionRecvonly {
 				continue
 			}
 
+			// search codec for this PayloadType
 			for _, codec := range media.Codecs {
-				if codec.PayloadType != payloadType {
+				if codec.PayloadType != uint8(remote.PayloadType()) {
 					continue
 				}
-
-				// leave only one codec in supported media list
-				if len(media.Codecs) > 1 {
-					c.medias[i].Codecs = []*streamer.Codec{codec}
-				}
-
-				// forward request to passive producer GetTrack
-				// will create NewTrack for sendonly media
-				return c.GetTrack(media, codec)
+				return media, codec
 			}
 		}
-
-	default:
-		panic("not implemented")
 	}
 
-	return nil
+	// fix moment when core.ModePassiveProducer or core.ModeActiveProducer
+	// sends new codec with new payload type to same media
+	// check GetTrack
+	panic(core.Caller())
+
+	return nil, nil
 }

pkg/webrtc/consumer.go

@@ -2,72 +2,77 @@ package webrtc
 
 import (
 	"encoding/json"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/h264"
+	"github.com/AlexxIT/go2rtc/pkg/h265"
 	"github.com/pion/rtp"
-	"github.com/pion/webrtc/v3"
 )
 
-func (c *Conn) GetMedias() []*streamer.Media {
+func (c *Conn) GetMedias() []*core.Media {
 	return c.medias
 }
 
-func (c *Conn) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	switch c.Mode {
-	case streamer.ModePassiveConsumer:
-		switch track.Direction {
-		case streamer.DirectionSendonly:
-			// send our track to WebRTC consumer
-			return c.addSendTrack(media, track)
+func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiver) error {
+	core.Assert(media.Direction == core.DirectionSendonly)
 
-		case streamer.DirectionRecvonly:
-			// receive track from WebRTC consumer (microphone, backchannel, two way audio)
-			return c.addConsumerRecvTrack(media, track)
-		}
-
-	case streamer.ModePassiveProducer:
-		// "Stream to camera" function
-		consCodec := media.MatchCodec(track.Codec)
-		consTrack := c.GetTrack(media, consCodec)
-		if consTrack == nil {
+	for _, sender := range c.senders {
+		if sender.Codec == codec {
+			sender.HandleRTP(track)
 			return nil
 		}
-
-		return track.Bind(func(packet *rtp.Packet) error {
-			return consTrack.WriteRTP(packet)
-		})
 	}
 
-	panic("not implemented")
-}
-
-func (c *Conn) addConsumerRecvTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
-	params := webrtc.RTPCodecParameters{
-		RTPCodecCapability: webrtc.RTPCodecCapability{
-			MimeType:  MimeType(track.Codec),
-			ClockRate: track.Codec.ClockRate,
-			Channels:  track.Codec.Channels,
-		},
-		PayloadType: 0, // don't know if this necessary
+	switch c.Mode {
+	case core.ModePassiveConsumer: // video/audio for browser
+	case core.ModeActiveProducer: // go2rtc as WebRTC client (backchannel)
+	case core.ModePassiveProducer: // WebRTC/WHIP
+	default:
+		panic(core.Caller())
 	}
 
-	tr := c.getTranseiver(media.MID)
+	localTrack := c.getTranseiver(media.ID).Sender().Track().(*Track)
 
-	// set codec for consumer recv track so remote peer should send media with this codec
-	_ = tr.SetCodecPreferences([]webrtc.RTPCodecParameters{params})
+	sender := core.NewSender(media, track.Codec)
+	sender.Handler = func(packet *rtp.Packet) {
+		c.send += packet.MarshalSize()
+		//important to send with remote PayloadType
+		_ = localTrack.WriteRTP(codec.PayloadType, packet)
+	}
 
-	c.tracks = append(c.tracks, track)
-	return track
+	switch codec.Name {
+	case core.CodecH264:
+		sender.Handler = h264.RTPPay(1200, sender.Handler)
+		if track.Codec.IsRTP() {
+			sender.Handler = h264.RTPDepay(track.Codec, sender.Handler)
+		} else {
+			sender.Handler = h264.RepairAVC(track.Codec, sender.Handler)
+		}
+
+	case core.CodecH265:
+		// SafariPay because it is the only browser in the world
+		// that supports WebRTC + H265
+		sender.Handler = h265.SafariPay(1200, sender.Handler)
+		if track.Codec.IsRTP() {
+			sender.Handler = h265.RTPDepay(track.Codec, sender.Handler)
+		}
+	}
+
+	sender.HandleRTP(track)
+
+	c.senders = append(c.senders, sender)
+	return nil
 }
 
 func (c *Conn) MarshalJSON() ([]byte, error) {
-	info := &streamer.Info{
+	info := &core.Info{
 		Type:       c.Desc + " " + c.Mode.String(),
 		RemoteAddr: c.remote,
 		UserAgent:  c.UserAgent,
 		Medias:     c.medias,
-		Tracks:     c.tracks,
-		Recv:       uint32(c.receive),
-		Send:       uint32(c.send),
+		Receivers:  c.receivers,
+		Senders:    c.senders,
+		Recv:       c.recv,
+		Send:       c.send,
 	}
 	return json.Marshal(info)
 }

pkg/webrtc/helpers.go

@@ -3,8 +3,9 @@ package webrtc
 import (
 	"errors"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/pion/ice/v2"
+	"github.com/pion/sdp/v3"
 	"github.com/pion/stun"
 	"github.com/pion/webrtc/v3"
 	"hash/crc32"
@@ -14,6 +15,43 @@ import (
 	"time"
 )
 
+func UnmarshalMedias(descriptions []*sdp.MediaDescription) (medias []*core.Media) {
+	// 1. Sort medias, so video will always be before audio
+	// 2. Ignore application media from Hass default lovelace card
+	// 3. Ignore media without direction (inactive media)
+	// 4. Inverse media direction (because it is remote peer medias list)
+	for _, kind := range []string{core.KindVideo, core.KindAudio} {
+		for _, md := range descriptions {
+			if md.MediaName.Media != kind {
+				continue
+			}
+
+			media := core.UnmarshalMedia(md)
+			switch media.Direction {
+			case core.DirectionSendRecv:
+				media.Direction = core.DirectionRecvonly
+				medias = append(medias, media)
+
+				media = media.Clone()
+				media.Direction = core.DirectionSendonly
+
+			case core.DirectionRecvonly:
+				media.Direction = core.DirectionSendonly
+
+			case core.DirectionSendonly:
+				media.Direction = core.DirectionRecvonly
+
+			case "":
+				continue
+			}
+
+			medias = append(medias, media)
+		}
+	}
+
+	return
+}
+
 func NewCandidate(network, address string) (string, error) {
 	i := strings.LastIndexByte(address, ':')
 	if i < 0 {
@@ -135,25 +173,25 @@ func IsIP(host string) bool {
 	return true
 }
 
-func MimeType(codec *streamer.Codec) string {
+func MimeType(codec *core.Codec) string {
 	switch codec.Name {
-	case streamer.CodecH264:
+	case core.CodecH264:
 		return webrtc.MimeTypeH264
-	case streamer.CodecH265:
+	case core.CodecH265:
 		return webrtc.MimeTypeH265
-	case streamer.CodecVP8:
+	case core.CodecVP8:
 		return webrtc.MimeTypeVP8
-	case streamer.CodecVP9:
+	case core.CodecVP9:
 		return webrtc.MimeTypeVP9
-	case streamer.CodecAV1:
+	case core.CodecAV1:
 		return webrtc.MimeTypeAV1
-	case streamer.CodecPCMU:
+	case core.CodecPCMU:
 		return webrtc.MimeTypePCMU
-	case streamer.CodecPCMA:
+	case core.CodecPCMA:
 		return webrtc.MimeTypePCMA
-	case streamer.CodecOpus:
+	case core.CodecOpus:
 		return webrtc.MimeTypeOpus
-	case streamer.CodecG722:
+	case core.CodecG722:
 		return webrtc.MimeTypeG722
 	}
 	panic("not implemented")