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muxer_instance.go
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/
muxer_instance.go
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package hls
import (
"errors"
"fmt"
"os"
"path/filepath"
"time"
"github.com/bluenviron/gohlslib"
"github.com/bluenviron/gohlslib/pkg/codecs"
"github.com/bluenviron/gortsplib/v4/pkg/format"
"github.com/bluenviron/mediamtx/internal/asyncwriter"
"github.com/bluenviron/mediamtx/internal/conf"
"github.com/bluenviron/mediamtx/internal/defs"
"github.com/bluenviron/mediamtx/internal/logger"
"github.com/bluenviron/mediamtx/internal/stream"
"github.com/bluenviron/mediamtx/internal/unit"
"github.com/gin-gonic/gin"
)
var errNoSupportedCodecs = errors.New(
"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG-4 Audio")
type muxerInstance struct {
variant conf.HLSVariant
segmentCount int
segmentDuration conf.StringDuration
partDuration conf.StringDuration
segmentMaxSize conf.StringSize
directory string
writeQueueSize int
pathName string
stream *stream.Stream
bytesSent *uint64
parent logger.Writer
writer *asyncwriter.Writer
hmuxer *gohlslib.Muxer
}
func (mi *muxerInstance) initialize() error {
mi.writer = asyncwriter.New(mi.writeQueueSize, mi)
videoTrack := mi.createVideoTrack()
audioTrack := mi.createAudioTrack()
if videoTrack == nil && audioTrack == nil {
mi.stream.RemoveReader(mi.writer)
return errNoSupportedCodecs
}
var muxerDirectory string
if mi.directory != "" {
muxerDirectory = filepath.Join(mi.directory, mi.pathName)
os.MkdirAll(muxerDirectory, 0o755)
}
mi.hmuxer = &gohlslib.Muxer{
Variant: gohlslib.MuxerVariant(mi.variant),
SegmentCount: mi.segmentCount,
SegmentDuration: time.Duration(mi.segmentDuration),
PartDuration: time.Duration(mi.partDuration),
SegmentMaxSize: uint64(mi.segmentMaxSize),
VideoTrack: videoTrack,
AudioTrack: audioTrack,
Directory: muxerDirectory,
}
err := mi.hmuxer.Start()
if err != nil {
mi.stream.RemoveReader(mi.writer)
return err
}
mi.Log(logger.Info, "is converting into HLS, %s",
defs.FormatsInfo(mi.stream.FormatsForReader(mi.writer)))
mi.writer.Start()
return nil
}
// Log implements logger.Writer.
func (mi *muxerInstance) Log(level logger.Level, format string, args ...interface{}) {
mi.parent.Log(level, format, args...)
}
func (mi *muxerInstance) close() {
mi.writer.Stop()
mi.hmuxer.Close()
mi.stream.RemoveReader(mi.writer)
if mi.hmuxer.Directory != "" {
os.Remove(mi.hmuxer.Directory)
}
}
func (mi *muxerInstance) createVideoTrack() *gohlslib.Track {
var videoFormatAV1 *format.AV1
videoMedia := mi.stream.Desc().FindFormat(&videoFormatAV1)
if videoFormatAV1 != nil {
mi.stream.AddReader(mi.writer, videoMedia, videoFormatAV1, func(u unit.Unit) error {
tunit := u.(*unit.AV1)
if tunit.TU == nil {
return nil
}
err := mi.hmuxer.WriteAV1(tunit.NTP, tunit.PTS, tunit.TU)
if err != nil {
return fmt.Errorf("muxer error: %w", err)
}
return nil
})
return &gohlslib.Track{
Codec: &codecs.AV1{},
}
}
var videoFormatVP9 *format.VP9
videoMedia = mi.stream.Desc().FindFormat(&videoFormatVP9)
if videoFormatVP9 != nil {
mi.stream.AddReader(mi.writer, videoMedia, videoFormatVP9, func(u unit.Unit) error {
tunit := u.(*unit.VP9)
if tunit.Frame == nil {
return nil
}
err := mi.hmuxer.WriteVP9(tunit.NTP, tunit.PTS, tunit.Frame)
if err != nil {
return fmt.Errorf("muxer error: %w", err)
}
return nil
})
return &gohlslib.Track{
Codec: &codecs.VP9{},
}
}
var videoFormatH265 *format.H265
videoMedia = mi.stream.Desc().FindFormat(&videoFormatH265)
if videoFormatH265 != nil {
mi.stream.AddReader(mi.writer, videoMedia, videoFormatH265, func(u unit.Unit) error {
tunit := u.(*unit.H265)
if tunit.AU == nil {
return nil
}
err := mi.hmuxer.WriteH26x(tunit.NTP, tunit.PTS, tunit.AU)
if err != nil {
return fmt.Errorf("muxer error: %w", err)
}
return nil
})
vps, sps, pps := videoFormatH265.SafeParams()
return &gohlslib.Track{
Codec: &codecs.H265{
VPS: vps,
SPS: sps,
PPS: pps,
},
}
}
var videoFormatH264 *format.H264
videoMedia = mi.stream.Desc().FindFormat(&videoFormatH264)
if videoFormatH264 != nil {
mi.stream.AddReader(mi.writer, videoMedia, videoFormatH264, func(u unit.Unit) error {
tunit := u.(*unit.H264)
if tunit.AU == nil {
return nil
}
err := mi.hmuxer.WriteH26x(tunit.NTP, tunit.PTS, tunit.AU)
if err != nil {
return fmt.Errorf("muxer error: %w", err)
}
return nil
})
sps, pps := videoFormatH264.SafeParams()
return &gohlslib.Track{
Codec: &codecs.H264{
SPS: sps,
PPS: pps,
},
}
}
return nil
}
func (mi *muxerInstance) createAudioTrack() *gohlslib.Track {
var audioFormatOpus *format.Opus
audioMedia := mi.stream.Desc().FindFormat(&audioFormatOpus)
if audioMedia != nil {
mi.stream.AddReader(mi.writer, audioMedia, audioFormatOpus, func(u unit.Unit) error {
tunit := u.(*unit.Opus)
err := mi.hmuxer.WriteOpus(
tunit.NTP,
tunit.PTS,
tunit.Packets)
if err != nil {
return fmt.Errorf("muxer error: %w", err)
}
return nil
})
return &gohlslib.Track{
Codec: &codecs.Opus{
ChannelCount: func() int {
if audioFormatOpus.IsStereo {
return 2
}
return 1
}(),
},
}
}
var audioFormatMPEG4Audio *format.MPEG4Audio
audioMedia = mi.stream.Desc().FindFormat(&audioFormatMPEG4Audio)
if audioMedia != nil {
mi.stream.AddReader(mi.writer, audioMedia, audioFormatMPEG4Audio, func(u unit.Unit) error {
tunit := u.(*unit.MPEG4Audio)
if tunit.AUs == nil {
return nil
}
err := mi.hmuxer.WriteMPEG4Audio(
tunit.NTP,
tunit.PTS,
tunit.AUs)
if err != nil {
return fmt.Errorf("muxer error: %w", err)
}
return nil
})
return &gohlslib.Track{
Codec: &codecs.MPEG4Audio{
Config: *audioFormatMPEG4Audio.GetConfig(),
},
}
}
return nil
}
func (mi *muxerInstance) errorChan() chan error {
return mi.writer.Error()
}
func (mi *muxerInstance) handleRequest(ctx *gin.Context) {
w := &responseWriterWithCounter{
ResponseWriter: ctx.Writer,
bytesSent: mi.bytesSent,
}
mi.hmuxer.Handle(w, ctx.Request)
}