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llhls.go
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package hls
import (
"net"
"net/http"
"path"
"strings"
"time"
"github.com/bluenviron/gohlslib"
"github.com/bluenviron/gohlslib/pkg/codecs"
"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4audio"
"go.uber.org/zap"
. "m7s.live/engine/v4"
"m7s.live/engine/v4/codec"
"m7s.live/engine/v4/config"
"m7s.live/engine/v4/track"
"m7s.live/engine/v4/util"
)
var llhlsConfig = &LLHLSConfig{
DefaultYaml: defaultYaml,
}
var LLHLSPlugin = InstallPlugin(llhlsConfig)
var llwriting util.Map[string, *LLMuxer]
type LLHLSConfig struct {
DefaultYaml
config.HTTP
config.Publish
// config.Pull
config.Subscribe
Filter string // 过滤，正则表达式
Path string
}
func (c *LLHLSConfig) OnEvent(event any) {
switch v := event.(type) {
case SEpublish:
if !llwriting.Has(v.Target.Path) {
var outStream LLMuxer
llwriting.Set(v.Target.Path, &outStream)
go outStream.Start(v.Target)
}
}
}
func (c *LLHLSConfig) ServeHTTP(w http.ResponseWriter, r *http.Request) {
streamPath := strings.TrimPrefix(r.URL.Path, "/")
streamPath = path.Dir(streamPath)
if llwriting.Has(streamPath) {
r.URL.Path = strings.TrimPrefix(r.URL.Path, "/"+streamPath)
llwriting.Get(streamPath).Handle(w, r)
return
} else {
w.Write([]byte(`<html><body><video src="/llhls/live/test/index.m3u8"></video></body></html>`))
}
}
type LLVideoTrack struct {
*track.AVRingReader
*track.Video
}
type LLAudioTrack struct {
*track.AVRingReader
*track.Audio
}
type LLMuxer struct {
*gohlslib.Muxer
Subscriber
audio_tracks []*LLAudioTrack
video_tracks []*LLVideoTrack
}
func (ll *LLMuxer) OnEvent(event any) {
var err error
defer func() {
if err != nil {
ll.Warn("write stop", zap.Error(err))
ll.Stop()
}
}()
switch v := event.(type) {
case *track.Video:
// track := ll.CreateTrackReader(&v.Media)
ll.video_tracks = append(ll.video_tracks, &LLVideoTrack{
Video: v,
})
case *track.Audio:
if v.CodecID != codec.CodecID_AAC {
return
}
ll.audio_tracks = append(ll.audio_tracks, &LLAudioTrack{
Audio: v,
})
default:
ll.Subscriber.OnEvent(event)
}
}
func (ll *LLMuxer) Start(s *Stream) {
if err := HLSPlugin.Subscribe(s.Path, ll); err != nil {
HLSPlugin.Error("LL-HLS Subscribe", zap.Error(err))
return
}
ll.Muxer = &gohlslib.Muxer{
Variant: gohlslib.MuxerVariantLowLatency,
SegmentCount: func() int {
return 7
}(),
SegmentDuration: 1 * time.Second,
}
var defaultAudio *LLAudioTrack
var defaultVideo *LLVideoTrack
for _, t := range ll.video_tracks {
if defaultVideo == nil {
defaultVideo = t
t.AVRingReader = ll.CreateTrackReader(&t.Video.Media)
t.Ring = t.IDRing
ll.Muxer.VideoTrack = &gohlslib.Track{}
switch t.Video.CodecID {
case codec.CodecID_H264:
ll.Muxer.VideoTrack.Codec = &codecs.H264{
SPS: t.Video.SPS,
PPS: t.Video.PPS,
}
case codec.CodecID_H265:
ll.Muxer.VideoTrack.Codec = &codecs.H265{
SPS: t.Video.SPS,
PPS: t.Video.PPS,
VPS: t.Video.ParamaterSets[2],
}
}
}
}
for _, t := range ll.audio_tracks {
if defaultAudio == nil {
defaultAudio = t
t.AVRingReader = ll.CreateTrackReader(&t.Audio.Media)
if defaultVideo != nil {
for t.IDRing == nil && !ll.IsClosed() {
time.Sleep(time.Millisecond * 10)
}
t.Ring = t.IDRing
} else {
t.Ring = t.Audio.Ring
}
ll.Muxer.AudioTrack = &gohlslib.Track{
Codec: &codecs.MPEG4Audio{
Config: mpeg4audio.Config{
Type: 2,
SampleRate: 44100,
ChannelCount: 2,
},
},
}
}
}
ll.Muxer.Start()
defer ll.Muxer.Close()
now := time.Now()
for ll.IO.Err() == nil {
for defaultAudio != nil {
frame, err := defaultAudio.TryRead()
if err != nil {
return
}
if frame == nil {
break
}
audioFrame := AudioFrame{
AVFrame: frame,
}
ll.Muxer.WriteAudio(now.Add(frame.Timestamp-time.Second), frame.Timestamp, util.ConcatBuffers(audioFrame.GetADTS()))
}
for defaultVideo != nil {
frame, err := defaultVideo.TryRead()
if err != nil {
return
}
if frame == nil {
break
}
var aus net.Buffers
if frame.IFrame {
aus = append(aus, defaultVideo.ParamaterSets...)
}
frame.AUList.Range(func(au *util.BLL) bool {
aus = append(aus, util.ConcatBuffers(au.ToBuffers()))
return true
})
ll.Muxer.WriteH26x(now.Add(frame.Timestamp-time.Second), frame.Timestamp, aus)
}
time.Sleep(time.Millisecond * 10)
}
}