improve transcode with timeline
This commit is contained in:
nareix
parent
1b301bfff2
commit
f065582479
@ -1,31 +1,33 @@
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package transcode
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import (
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"github.com/nareix/av"
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"github.com/nareix/av/pktreorder"
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"fmt"
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"time"
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"github.com/nareix/av"
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"github.com/nareix/av/pktque"
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)
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const debug = false
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const debug = true
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type tstream struct {
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av.CodecData
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type tStream struct {
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codec av.CodecData
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timeline *pktque.Timeline
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aencodec, adecodec av.AudioCodecData
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aenc av.AudioEncoder
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adec av.AudioDecoder
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}
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type Transcoder struct {
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FindAudioDecoderEncoder func(codec av.AudioCodecData) (ok bool, err error, dec av.AudioDecoder, enc av.AudioEncoder)
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streams []*tstream
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queue *pktreorder.Queue
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streams []*tStream
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}
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func (self *Transcoder) Setup(streams []av.CodecData) (err error) {
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self.streams = []*tstream{}
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self.streams = []*tStream{}
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for _, stream := range streams {
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ts := &tstream{CodecData: stream}
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if stream.IsAudio() {
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ts := &tStream{codec: stream}
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if stream.Type().IsAudio() {
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if self.FindAudioDecoderEncoder != nil {
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var ok bool
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var enc av.AudioEncoder
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@ -35,7 +37,10 @@ func (self *Transcoder) Setup(streams []av.CodecData) (err error) {
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if err != nil {
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return
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}
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ts.CodecData = enc.CodecData()
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ts.timeline = &pktque.Timeline{}
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ts.codec = enc.CodecData()
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ts.aencodec = ts.codec.(av.AudioCodecData)
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ts.adecodec = stream.(av.AudioCodecData)
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ts.aenc = enc
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ts.adec = dec
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}
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@ -43,74 +48,67 @@ func (self *Transcoder) Setup(streams []av.CodecData) (err error) {
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}
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self.streams = append(self.streams, ts)
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}
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self.queue = &pktreorder.Queue{}
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var newstreams []av.CodecData
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newstreams, _ = self.Streams()
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self.queue.Alloc(newstreams)
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return
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}
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func (self *Transcoder) decodeAndEncode(stream *tstream, i int, pkt av.Packet) (err error) {
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func (self *tStream) audioDecodeAndEncode(inpkt av.Packet) (outpkts []av.Packet, err error) {
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var dur time.Duration
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var frame av.AudioFrame
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var ok bool
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if ok, frame, err = stream.adec.Decode(pkt.Data); err != nil {
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if ok, frame, err = self.adec.Decode(inpkt.Data); err != nil {
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return
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}
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if ok {
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var pkts []av.Packet
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if pkts, err = stream.aenc.Encode(frame); err != nil {
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if !ok {
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return
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}
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for _, pkt := range pkts {
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self.queue.WritePacket(i, pkt)
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if dur, err = self.adecodec.PacketDuration(inpkt.Data); err != nil {
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err = fmt.Errorf("transcode: PacketDuration() failed for input stream #%d", inpkt.Idx)
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return
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}
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if debug {
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fmt.Println("transcode: push", inpkt.Time, dur)
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}
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self.timeline.Push(inpkt.Time, dur)
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var _outpkts [][]byte
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if _outpkts, err = self.aenc.Encode(frame); err != nil {
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return
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}
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for _, _outpkt := range _outpkts {
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if dur, err = self.aencodec.PacketDuration(_outpkt); err != nil {
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err = fmt.Errorf("transcode: PacketDuration() failed for output stream #%d", inpkt.Idx)
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return
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}
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outpkt := av.Packet{Idx: inpkt.Idx, Data: _outpkt}
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outpkt.Time = self.timeline.Pop(dur)
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if debug {
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fmt.Println("transcode: pop", outpkt.Time)
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}
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outpkts = append(outpkts, outpkt)
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}
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return
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}
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func (self *Transcoder) WritePacket(i int, pkt av.Packet) {
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if debug {
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fmt.Println("transcode: Transcoder.WritePacket", i, len(pkt.Data), fmt.Sprintf("%.2f", pkt.Duration))
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fmt.Println("transcode: Transcoder.CanReadPacket", self.CanReadPacket())
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}
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stream := self.streams[i]
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func (self *Transcoder) Do(pkt av.Packet) (out []av.Packet, err error) {
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stream := self.streams[pkt.Idx]
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if stream.aenc != nil && stream.adec != nil {
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if err := self.decodeAndEncode(stream, i, pkt); err != nil {
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self.queue.EndWritePacket(err)
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if out, err = stream.audioDecodeAndEncode(pkt); err != nil {
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return
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}
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} else {
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self.queue.WritePacket(i, pkt)
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out = append(out, pkt)
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}
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return
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}
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func (self *Transcoder) EndWritePacket(err error) {
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self.queue.EndWritePacket(err)
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}
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func (self *Transcoder) CanReadPacket() bool {
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return self.queue.CanReadPacket()
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}
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func (self *Transcoder) CanWritePacket() bool {
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return self.queue.CanWritePacket()
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}
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func (self *Transcoder) Error() error {
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return self.queue.Error()
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}
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func (self *Transcoder) ReadPacket() (i int, pkt av.Packet, err error) {
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return self.queue.ReadPacket()
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}
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func (self *Transcoder) Streams() (streams []av.CodecData, err error) {
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for _, stream := range self.streams {
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streams = append(streams, stream.CodecData)
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streams = append(streams, stream.codec)
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}
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return
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}
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@ -119,12 +117,14 @@ func (self *Transcoder) Close() {
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for _, stream := range self.streams {
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if stream.aenc != nil {
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stream.aenc.Close()
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stream.aenc = nil
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}
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if stream.adec != nil {
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stream.adec.Close()
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stream.adec = nil
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}
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}
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self.streams = []*tstream{}
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self.streams = []*tStream{}
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}
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type Muxer struct {
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@ -146,33 +146,21 @@ func (self *Muxer) WriteHeader(streams []av.CodecData) (err error) {
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return
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}
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func (self *Muxer) WritePacket(i int, pkt av.Packet) (err error) {
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self.Transcoder.WritePacket(i, pkt)
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if self.Transcoder.CanReadPacket() {
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if i, pkt, rerr := self.Transcoder.ReadPacket(); rerr != nil {
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err = rerr
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func (self *Muxer) WritePacket(pkt av.Packet) (err error) {
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var outpkts []av.Packet
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if outpkts, err = self.Transcoder.Do(pkt); err != nil {
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return
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} else {
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if werr := self.Muxer.WritePacket(i, pkt); werr != nil {
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self.Transcoder.EndWritePacket(werr)
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}
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for _, pkt := range outpkts {
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if err = self.Muxer.WritePacket(pkt); err != nil {
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return
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}
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}
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return
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}
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func (self *Muxer) WriteTrailer() (err error) {
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self.Transcoder.EndWritePacket(nil)
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for {
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if i, pkt, rerr := self.Transcoder.ReadPacket(); rerr != nil {
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break
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} else {
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if werr := self.Muxer.WritePacket(i, pkt); werr != nil {
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err = werr
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return
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}
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}
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}
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// TODO: do flush
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if err = self.Muxer.WriteTrailer(); err != nil {
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return
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}
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@ -182,6 +170,7 @@ func (self *Muxer) WriteTrailer() (err error) {
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type Demuxer struct {
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Demuxer av.Demuxer
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Transcoder *Transcoder
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outpkts []av.Packet
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}
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func (self *Demuxer) Setup() (err error) {
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@ -195,21 +184,22 @@ func (self *Demuxer) Setup() (err error) {
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return
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}
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func (self *Demuxer) ReadPacket() (i int, pkt av.Packet, err error) {
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func (self *Demuxer) ReadPacket() (pkt av.Packet, err error) {
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for {
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if self.Transcoder.CanReadPacket() {
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return self.Transcoder.ReadPacket()
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} else if self.Transcoder.CanWritePacket() {
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if i, pkt, err := self.Demuxer.ReadPacket(); err != nil {
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self.Transcoder.EndWritePacket(err)
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} else {
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self.Transcoder.WritePacket(i, pkt)
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if len(self.outpkts) > 0 {
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pkt = self.outpkts[0]
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self.outpkts = self.outpkts[1:]
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return
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}
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} else {
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err = self.Transcoder.Error()
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var rpkt av.Packet
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if rpkt, err = self.Demuxer.ReadPacket(); err != nil {
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return
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}
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if self.outpkts, err = self.Transcoder.Do(rpkt); err != nil {
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return
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}
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}
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return
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}
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func (self *Demuxer) Streams() ([]av.CodecData, error) {
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@ -219,4 +209,3 @@ func (self *Demuxer) Streams() ([]av.CodecData, error) {
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func (self *Demuxer) Close() {
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self.Transcoder.Close()
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}
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