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rtmp.go
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rtmp.go
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package main
import (
"fmt"
"github.com/yapingcat/gomedia/go-codec"
_ "github.com/yapingcat/gomedia/go-codec"
"github.com/yapingcat/gomedia/go-rtmp"
"log"
"net"
"sync"
)
type RtmpCenter struct {
streams map[string]RtmpProducer
mixer RtmpMixerProducer
mtx sync.Mutex
}
func (center *RtmpCenter) find(name string) RtmpProducer {
center.mtx.Lock()
defer center.mtx.Unlock()
if name == "_mixer_" {
return ¢er.mixer
}
if p, found := center.streams[name]; found {
return p
} else {
return nil
}
}
func (center *RtmpCenter) unRegister(name string) {
center.mtx.Lock()
defer center.mtx.Unlock()
delete(center.streams, name)
}
func (center *RtmpCenter) register(name string, p RtmpProducer) {
center.mtx.Lock()
defer center.mtx.Unlock()
center.streams[name] = p
}
var rtmpCenter RtmpCenter
func init() {
rtmpCenter = RtmpCenter{streams: make(map[string]RtmpProducer), mixer: RtmpMixerProducer{quit: make(chan struct{}), selectProducerCh: make(chan string, 1)}}
go rtmpCenter.mixer.dispatch()
}
func startRtmpServer(closeCh chan<- struct{}) {
log.Println("Starting RTMP Server")
tcpAddr, _ := net.ResolveTCPAddr("tcp", ":1935")
listener, err := net.ListenTCP("tcp", tcpAddr)
if err != nil {
close(closeCh)
log.Fatalf("RTMP server start failed: %+v", err)
}
for {
conn, _ := listener.Accept()
sess := newRtmpSession(conn)
sess.init()
go sess.start()
}
}
type RtmpSession struct {
id string
mtx sync.Mutex
conn net.Conn
handle *rtmp.RtmpServerHandle
quit chan struct{}
frameCome chan struct{}
C chan *MediaFrame
source RtmpProducer
frameLists []*MediaFrame
isReady bool
die sync.Once
}
func (sess *RtmpSession) getId() string {
return sess.id
}
func newRtmpSession(conn net.Conn) *RtmpSession {
id := randConnectionKey(10)
return &RtmpSession{
id: id,
conn: conn,
handle: rtmp.NewRtmpServerHandle(),
quit: make(chan struct{}),
frameCome: make(chan struct{}, 1),
C: make(chan *MediaFrame, 3000),
}
}
func (sess *RtmpSession) init() {
sess.handle.OnPublish(func(app, streamName string) rtmp.StatusCode {
return rtmp.NETSTREAM_PUBLISH_START
})
sess.handle.SetOutput(func(b []byte) error {
_, err := sess.conn.Write(b)
return err
})
sess.handle.OnStateChange(func(newState rtmp.RtmpState) {
if newState == rtmp.STATE_RTMP_PLAY_START {
name := sess.handle.GetStreamName()
log.Printf("RTMP play %s starting ...", name)
source := rtmpCenter.find(name)
sess.source = source
if source != nil {
source.AddConsumer(sess)
sess.isReady = true
go sess.sendToClient()
} else {
log.Printf("RTMP source %s not found", name)
}
} else if newState == rtmp.STATE_RTMP_PUBLISH_START {
sess.handle.OnFrame(func(cid codec.CodecID, pts, dts uint32, frame []byte) {
f := &MediaFrame{
cid: cid,
frame: frame,
pts: pts,
dts: dts,
}
sess.C <- f
})
name := sess.handle.GetStreamName()
p := newRtmpStreamProducer(name, sess)
go p.dispatch()
rtmpCenter.register(name, p)
}
})
}
func (sess *RtmpSession) sendToClient() {
firstVideo := true
for {
select {
case <-sess.frameCome:
sess.mtx.Lock()
frames := sess.frameLists
sess.frameLists = nil
sess.mtx.Unlock()
for _, frame := range frames {
if frame.cid != codec.CODECID_VIDEO_H264 && frame.cid != codec.CODECID_AUDIO_AAC {
continue
}
if firstVideo { //wait for I frame
if frame.cid == codec.CODECID_VIDEO_H264 {
if !codec.IsH264IDRFrame(frame.frame) {
continue
}
firstVideo = false
} else {
continue
}
}
err := sess.handle.WriteFrame(frame.cid, frame.frame, frame.pts, frame.dts)
if err != nil {
sess.stop()
return
}
}
case <-sess.quit:
return
}
}
}
func (sess *RtmpSession) stop() {
sess.die.Do(func() {
close(sess.quit)
if sess.source != nil {
sess.source.RemoveConsumer(sess.id)
sess.source = nil
}
_ = sess.conn.Close()
})
}
func (sess *RtmpSession) ready() bool {
return sess.isReady
}
func (sess *RtmpSession) play(frame *MediaFrame) {
sess.mtx.Lock()
sess.frameLists = append(sess.frameLists, frame)
sess.mtx.Unlock()
select {
case sess.frameCome <- struct{}{}:
default:
}
}
func (sess *RtmpSession) start() {
defer sess.stop()
for {
buf := make([]byte, 65536)
n, err := sess.conn.Read(buf)
if err != nil {
log.Printf("RTMP session read error %s", err.Error())
return
}
err = sess.handle.Input(buf[:n])
if err != nil {
log.Printf("RTMP session input error %s", err.Error())
fmt.Println(err)
return
}
}
}
func newRtmpStreamProducer(name string, sess *RtmpSession) *RtmpStreamProducer {
return &RtmpStreamProducer{
name: name,
session: sess,
quit: make(chan struct{}),
}
}
type MediaFrame struct {
cid codec.CodecID
frame []byte
pts uint32
dts uint32
}
func (f *MediaFrame) clone() *MediaFrame {
tmp := &MediaFrame{
cid: f.cid,
pts: f.pts,
dts: f.dts,
}
tmp.frame = make([]byte, len(f.frame))
copy(tmp.frame, f.frame)
return tmp
}
type RtmpProducer interface {
AddConsumer(sess MediaConsumer)
RemoveConsumer(id string)
}
type RtmpStreamProducer struct {
name string
session *RtmpSession
consumers sync.Map // string -> MediaConsumer
quit chan struct{}
die sync.Once
}
const RtmpMixerStreamName = "_RTMP_MIXER_"
type RtmpMixerProducer struct {
currentProducer RtmpProducer
consumers sync.Map // string -> MediaConsumer
selectProducerCh chan string
quit chan struct{}
die sync.Once
}
func (producer *RtmpMixerProducer) getId() string {
return RtmpMixerStreamName
}
func (producer *RtmpMixerProducer) ready() bool {
return true
}
func (producer *RtmpMixerProducer) play(frame *MediaFrame) {
producer.consumers.Range(func(_, value any) bool {
consumer := value.(MediaConsumer)
if consumer.ready() {
tmp := frame.clone()
consumer.play(tmp)
}
return true
})
}
func (producer *RtmpMixerProducer) AddConsumer(consumer MediaConsumer) {
producer.consumers.Store(consumer.getId(), consumer)
}
func (producer *RtmpMixerProducer) RemoveConsumer(id string) {
producer.consumers.Delete(id)
}
func (producer *RtmpMixerProducer) dispatch() {
defer func() {
log.Println("quit dispatch")
//producer.stop() todo: fix
}()
for {
select {
case newProducerName := <-producer.selectProducerCh:
newProducer := rtmpCenter.find(newProducerName)
if newProducer == nil {
log.Printf("Unknown RTMP producer `%s` selected in mixer", newProducerName)
continue
}
log.Printf("RTMP mixer stream %s select", newProducerName)
if producer.currentProducer != nil {
producer.currentProducer.RemoveConsumer(RtmpMixerStreamName)
}
producer.currentProducer = newProducer
newProducer.AddConsumer(producer)
case <-producer.quit:
return
}
}
}
func (producer *RtmpMixerProducer) SelectProducer(name string) {
producer.selectProducerCh <- name
}
func (producer *RtmpStreamProducer) dispatch() {
defer func() {
fmt.Println("quit dispatch")
producer.stop()
}()
for {
select {
case frame := <-producer.session.C:
if frame == nil {
continue
}
producer.consumers.Range(func(_, value any) bool {
consumer := value.(MediaConsumer)
if consumer.ready() {
tmp := frame.clone()
consumer.play(tmp)
}
return true
})
case <-producer.session.quit:
return
case <-producer.quit:
return
}
}
}
func (producer *RtmpStreamProducer) AddConsumer(consumer MediaConsumer) {
producer.consumers.Store(consumer.getId(), consumer)
}
func (producer *RtmpStreamProducer) RemoveConsumer(id string) {
producer.consumers.Delete(id)
}
func (producer *RtmpStreamProducer) stop() {
producer.die.Do(func() {
close(producer.quit)
rtmpCenter.unRegister(producer.name)
})
}
type MediaConsumer interface {
getId() string
ready() bool
play(tmp *MediaFrame)
}