mirror of
https://github.com/Monibuca/engine.git
synced 2025-10-06 00:56:58 +08:00
411 lines
11 KiB
Go
411 lines
11 KiB
Go
package engine
|
||
|
||
import (
|
||
"strings"
|
||
"sync"
|
||
"time"
|
||
"unsafe"
|
||
|
||
. "github.com/logrusorgru/aurora"
|
||
"go.uber.org/zap"
|
||
. "m7s.live/engine/v4/common"
|
||
"m7s.live/engine/v4/log"
|
||
"m7s.live/engine/v4/track"
|
||
"m7s.live/engine/v4/util"
|
||
)
|
||
|
||
type StreamState byte
|
||
type StreamAction byte
|
||
|
||
type StateEvent struct {
|
||
Action StreamAction
|
||
From StreamState
|
||
Stream *Stream
|
||
}
|
||
|
||
func (se StateEvent) Next() (next StreamState, ok bool) {
|
||
next, ok = StreamFSM[se.From][se.Action]
|
||
return
|
||
}
|
||
|
||
type SEwaitPublish struct {
|
||
StateEvent
|
||
Publisher IPublisher
|
||
}
|
||
type SEpublish struct {
|
||
StateEvent
|
||
}
|
||
type SEwaitClose struct {
|
||
StateEvent
|
||
}
|
||
type SEclose struct {
|
||
StateEvent
|
||
}
|
||
|
||
type SEKick struct {
|
||
}
|
||
|
||
// 四状态机
|
||
const (
|
||
STATE_WAITPUBLISH StreamState = iota // 等待发布者状态
|
||
STATE_PUBLISHING // 正在发布流状态
|
||
STATE_WAITCLOSE // 等待关闭状态(自动关闭延时开启)
|
||
STATE_CLOSED // 流已关闭，不可使用
|
||
)
|
||
|
||
const (
|
||
ACTION_PUBLISH StreamAction = iota
|
||
ACTION_TIMEOUT // 发布流长时间没有数据/长时间没有发布者发布流/等待关闭时间到
|
||
ACTION_PUBLISHLOST // 发布者意外断开
|
||
ACTION_CLOSE // 主动关闭流
|
||
ACTION_LASTLEAVE // 最后一个订阅者离开
|
||
ACTION_FIRSTENTER // 第一个订阅者进入
|
||
)
|
||
|
||
var StateNames = [...]string{"⌛", "🟢", "🟡", "🔴"}
|
||
var ActionNames = [...]string{"publish", "timeout", "publish lost", "close", "last leave", "first enter", "no tracks"}
|
||
|
||
/*
|
||
stateDiagram-v2
|
||
[*] --> ⌛等待发布者 : 创建
|
||
⌛等待发布者 --> 🟢正在发布 :发布
|
||
⌛等待发布者 --> 🔴已关闭 :关闭
|
||
⌛等待发布者 --> 🔴已关闭 :超时
|
||
⌛等待发布者 --> 🔴已关闭 :最后订阅者离开
|
||
🟢正在发布 --> ⌛等待发布者: 发布者断开
|
||
🟢正在发布 --> 🟡等待关闭: 最后订阅者离开
|
||
🟢正在发布 --> 🔴已关闭 :关闭
|
||
🟡等待关闭 --> 🟢正在发布 :第一个订阅者进入
|
||
🟡等待关闭 --> 🔴已关闭 :关闭
|
||
🟡等待关闭 --> 🔴已关闭 :超时
|
||
🟡等待关闭 --> 🔴已关闭 :发布者断开
|
||
*/
|
||
|
||
var StreamFSM = [len(StateNames)]map[StreamAction]StreamState{
|
||
{
|
||
ACTION_PUBLISH: STATE_PUBLISHING,
|
||
ACTION_TIMEOUT: STATE_CLOSED,
|
||
ACTION_LASTLEAVE: STATE_CLOSED,
|
||
ACTION_CLOSE: STATE_CLOSED,
|
||
},
|
||
{
|
||
ACTION_PUBLISHLOST: STATE_WAITPUBLISH,
|
||
ACTION_LASTLEAVE: STATE_WAITCLOSE,
|
||
ACTION_CLOSE: STATE_CLOSED,
|
||
},
|
||
{
|
||
ACTION_PUBLISHLOST: STATE_CLOSED,
|
||
ACTION_TIMEOUT: STATE_CLOSED,
|
||
ACTION_FIRSTENTER: STATE_PUBLISHING,
|
||
ACTION_CLOSE: STATE_CLOSED,
|
||
},
|
||
{},
|
||
}
|
||
|
||
// Streams 所有的流集合
|
||
var Streams = util.Map[string, *Stream]{Map: make(map[string]*Stream)}
|
||
|
||
func FilterStreams[T IPublisher]() (ss []*Stream) {
|
||
Streams.RLock()
|
||
defer Streams.RUnlock()
|
||
for _, s := range Streams.Map {
|
||
if _, ok := s.Publisher.(T); ok {
|
||
ss = append(ss, s)
|
||
}
|
||
}
|
||
return
|
||
}
|
||
|
||
type StreamTimeoutConfig struct {
|
||
WaitTimeout time.Duration
|
||
PublishTimeout time.Duration
|
||
WaitCloseTimeout time.Duration
|
||
}
|
||
|
||
// Stream 流定义
|
||
type Stream struct {
|
||
timeout *time.Timer //当前状态的超时定时器
|
||
actionChan util.SafeChan[any]
|
||
*zap.Logger
|
||
StartTime time.Time //创建时间
|
||
StreamTimeoutConfig
|
||
Path string
|
||
Publisher IPublisher
|
||
State StreamState
|
||
Subscribers []ISubscriber // 订阅者
|
||
Tracks map[string]Track
|
||
AppName string
|
||
StreamName string
|
||
}
|
||
|
||
func (s *Stream) SSRC() uint32 {
|
||
return uint32(uintptr(unsafe.Pointer(s)))
|
||
}
|
||
|
||
func findOrCreateStream(streamPath string, waitTimeout time.Duration) (s *Stream, created bool) {
|
||
p := strings.Split(streamPath, "/")
|
||
if len(p) < 2 {
|
||
log.Warn(Red("Stream Path Format Error:"), streamPath)
|
||
return nil, false
|
||
}
|
||
if s, ok := Streams.Map[streamPath]; ok {
|
||
s.Debug("Stream Found")
|
||
return s, false
|
||
} else {
|
||
p := strings.Split(streamPath, "/")
|
||
s = &Stream{
|
||
Path: streamPath,
|
||
AppName: p[0],
|
||
StreamName: util.LastElement(p),
|
||
}
|
||
s.Logger = log.With(zap.String("stream", streamPath))
|
||
s.Info("created")
|
||
s.WaitTimeout = waitTimeout
|
||
Streams.Map[streamPath] = s
|
||
s.actionChan.Init(1)
|
||
s.timeout = time.NewTimer(waitTimeout)
|
||
s.Tracks = make(map[string]Track)
|
||
go s.run()
|
||
return s, true
|
||
}
|
||
}
|
||
func (r *Stream) broadcast(event any) {
|
||
for _, sub := range r.Subscribers {
|
||
sub.OnEvent(event)
|
||
}
|
||
}
|
||
func (r *Stream) action(action StreamAction) (ok bool) {
|
||
event := StateEvent{action, r.State, r}
|
||
var next StreamState
|
||
if next, ok = event.Next(); ok {
|
||
r.State = next
|
||
// 给Publisher状态变更的回调，方便进行远程拉流等操作
|
||
var stateEvent any
|
||
r.Debug(Sprintf("%s%s%s", StateNames[event.From], Yellow("->"), StateNames[next]), zap.String("action", ActionNames[action]))
|
||
switch next {
|
||
case STATE_WAITPUBLISH:
|
||
stateEvent = SEwaitPublish{event, r.Publisher}
|
||
r.timeout.Reset(r.WaitTimeout)
|
||
case STATE_PUBLISHING:
|
||
stateEvent = SEpublish{event}
|
||
r.broadcast(stateEvent)
|
||
r.timeout.Reset(time.Second * 5) // 5秒心跳，检测track的存活度
|
||
case STATE_WAITCLOSE:
|
||
stateEvent = SEwaitClose{event}
|
||
r.timeout.Reset(r.WaitCloseTimeout)
|
||
case STATE_CLOSED:
|
||
for !r.actionChan.Close() {
|
||
// 等待channel发送完毕
|
||
time.Sleep(time.Millisecond * 100)
|
||
}
|
||
stateEvent = SEclose{event}
|
||
r.broadcast(stateEvent)
|
||
r.Subscribers = nil
|
||
Streams.Delete(r.Path)
|
||
r.timeout.Stop()
|
||
}
|
||
EventBus <- stateEvent
|
||
if r.Publisher != nil {
|
||
r.Publisher.OnEvent(stateEvent)
|
||
}
|
||
} else {
|
||
r.Debug("wrong action", zap.String("action", ActionNames[action]))
|
||
}
|
||
return
|
||
}
|
||
func (r *Stream) IsClosed() bool {
|
||
if r == nil {
|
||
return true
|
||
}
|
||
return r.State == STATE_CLOSED
|
||
}
|
||
|
||
func (s *Stream) Close() {
|
||
s.Receive(ACTION_CLOSE)
|
||
}
|
||
|
||
func (s *Stream) Receive(event any) bool {
|
||
return s.actionChan.Send(event)
|
||
}
|
||
|
||
// 流状态处理中枢，包括接收订阅发布指令等
|
||
func (s *Stream) run() {
|
||
var waitP []*util.Promise[ISubscriber, struct{}]
|
||
for {
|
||
select {
|
||
case <-s.timeout.C:
|
||
if s.State == STATE_PUBLISHING {
|
||
for name, t := range s.Tracks {
|
||
// track 超过一定时间没有更新数据了
|
||
if lastWriteTime := t.LastWriteTime(); !lastWriteTime.IsZero() && time.Since(lastWriteTime) > s.PublishTimeout {
|
||
s.Warn("track timeout", zap.String("name", name), zap.Time("lastWriteTime", lastWriteTime), zap.Duration("timeout", s.PublishTimeout))
|
||
delete(s.Tracks, name)
|
||
s.broadcast(TrackRemoved{t})
|
||
}
|
||
}
|
||
deletes := 0
|
||
for i, sub := range s.Subscribers {
|
||
if sub.IsClosed() {
|
||
s.Subscribers = append(s.Subscribers[:(i-deletes)], s.Subscribers[i-deletes+1:]...)
|
||
s.Info("suber -1", zap.String("id", sub.getIO().ID), zap.String("type", sub.getIO().Type), zap.Int("remains", len(s.Subscribers)))
|
||
if s.Publisher != nil {
|
||
s.Publisher.OnEvent(sub) // 通知Publisher有订阅者离开，在回调中可以去获取订阅者数量
|
||
}
|
||
if len(s.Subscribers) == 0 && s.WaitCloseTimeout > 0 {
|
||
s.action(ACTION_LASTLEAVE)
|
||
}
|
||
}
|
||
}
|
||
if len(s.Tracks) == 0 || (s.Publisher != nil && s.Publisher.IsClosed()) {
|
||
s.action(ACTION_PUBLISHLOST)
|
||
} else {
|
||
s.timeout.Reset(time.Second * 5)
|
||
}
|
||
} else {
|
||
s.Debug("timeout", zap.String("state", StateNames[s.State]))
|
||
s.action(ACTION_TIMEOUT)
|
||
}
|
||
case action, ok := <-s.actionChan.C:
|
||
if ok {
|
||
switch v := action.(type) {
|
||
case *util.Promise[IPublisher, struct{}]:
|
||
oldPublisher := s.Publisher
|
||
s.Publisher = v.Value
|
||
if oldPublisher == nil {
|
||
oldPublisher = v.Value
|
||
}
|
||
if s.action(ACTION_PUBLISH) {
|
||
io := v.Value.getIO()
|
||
io.Spesic = v.Value
|
||
io.Stream = s
|
||
io.StartTime = time.Now()
|
||
io.Logger = s.With(zap.String("type", io.Type))
|
||
if io.ID != "" {
|
||
io.Logger = io.Logger.With(zap.String("ID", io.ID))
|
||
}
|
||
v.Value.OnEvent(oldPublisher) // 发出成功发布事件
|
||
v.Resolve(util.Null)
|
||
for _, p := range waitP {
|
||
p.Resolve(util.Null)
|
||
}
|
||
waitP = waitP[:0]
|
||
} else {
|
||
s.Publisher = nil
|
||
v.Reject(BadNameErr)
|
||
}
|
||
case *util.Promise[ISubscriber, struct{}]:
|
||
if s.IsClosed() {
|
||
v.Reject(StreamIsClosedErr)
|
||
}
|
||
suber := v.Value
|
||
io := suber.getIO()
|
||
io.Spesic = suber
|
||
s.Subscribers = append(s.Subscribers, suber)
|
||
sbConfig := io.Config
|
||
if wt := sbConfig.WaitTimeout.Duration(); wt > s.WaitTimeout {
|
||
s.WaitTimeout = wt
|
||
}
|
||
io.Stream = s
|
||
io.StartTime = time.Now()
|
||
io.Logger = s.With(zap.String("type", io.Type))
|
||
if io.ID != "" {
|
||
io.Logger = io.Logger.With(zap.String("ID", io.ID))
|
||
}
|
||
s.Info("suber +1", zap.String("id", io.ID), zap.String("type", io.Type), zap.Int("remains", len(s.Subscribers)))
|
||
if s.Publisher != nil {
|
||
s.Publisher.OnEvent(v) // 通知Publisher有新的订阅者加入，在回调中可以去获取订阅者数量
|
||
for _, t := range s.Tracks {
|
||
switch t.(type) {
|
||
case *track.Audio:
|
||
if !sbConfig.SubAudio {
|
||
continue
|
||
}
|
||
case *track.Video:
|
||
if !sbConfig.SubVideo {
|
||
continue
|
||
}
|
||
}
|
||
suber.OnEvent(t) // 把现有的Track发给订阅者
|
||
}
|
||
} else {
|
||
waitP = append(waitP, v)
|
||
}
|
||
suber.OnEvent(suber) // 订阅成功事件
|
||
v.Resolve(util.Null)
|
||
if len(s.Subscribers) == 1 {
|
||
s.action(ACTION_FIRSTENTER)
|
||
}
|
||
case Track:
|
||
name := v.GetName()
|
||
if _, ok := s.Tracks[name]; !ok {
|
||
s.Tracks[name] = v
|
||
s.Info("track +1", zap.String("name", name))
|
||
s.broadcast(v)
|
||
}
|
||
case TrackRemoved:
|
||
name := v.GetName()
|
||
if t, ok := s.Tracks[name]; ok {
|
||
s.Info("track -1", zap.String("name", name))
|
||
delete(s.Tracks, name)
|
||
s.broadcast(v)
|
||
if len(s.Tracks) == 0 {
|
||
s.action(ACTION_PUBLISHLOST)
|
||
}
|
||
if dt, ok := t.(*track.Data); ok {
|
||
dt.Dispose()
|
||
}
|
||
}
|
||
case StreamAction:
|
||
s.action(v)
|
||
default:
|
||
s.Error("unknown action", zap.Any("action", action))
|
||
}
|
||
} else {
|
||
for _, p := range waitP {
|
||
p.Reject(StreamIsClosedErr)
|
||
}
|
||
for _, t := range s.Tracks {
|
||
if dt, ok := t.(*track.Data); ok {
|
||
dt.Dispose()
|
||
}
|
||
}
|
||
return
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
func (s *Stream) AddTrack(t Track) {
|
||
s.Receive(t)
|
||
}
|
||
|
||
type TrackRemoved struct {
|
||
Track
|
||
}
|
||
|
||
func (s *Stream) RemoveTrack(t Track) {
|
||
s.Receive(TrackRemoved{t})
|
||
}
|
||
|
||
// 如果暂时不知道编码格式可以用这个
|
||
func (r *Stream) NewVideoTrack() (vt *track.UnknowVideo) {
|
||
vt = &track.UnknowVideo{}
|
||
vt.Stream = r
|
||
return
|
||
}
|
||
|
||
func (r *Stream) NewAudioTrack() (at *track.UnknowAudio) {
|
||
at = &track.UnknowAudio{}
|
||
at.Stream = r
|
||
return
|
||
}
|
||
|
||
func (r *Stream) NewDataTrack(locker sync.Locker) (dt *track.Data) {
|
||
dt = &track.Data{
|
||
Locker: locker,
|
||
}
|
||
dt.Init(10)
|
||
dt.Stream = r
|
||
return
|
||
}
|