Initial commit

pkg/mse/consumer.go

@@ -0,0 +1,131 @@
+package mse
+
+import (
+	"encoding/json"
+	"github.com/AlexxIT/go2rtc/pkg/h264"
+	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"github.com/deepch/vdk/av"
+	"github.com/deepch/vdk/codec/h264parser"
+	"github.com/deepch/vdk/format/mp4f"
+	"github.com/pion/rtp"
+	"time"
+)
+
+const MsgTypeMSE = "mse"
+
+type Consumer struct {
+	streamer.Element
+
+	UserAgent  string
+	RemoteAddr string
+
+	muxer   *mp4f.Muxer
+	streams []av.CodecData
+	start   bool
+
+	send int
+}
+
+func (c *Consumer) GetMedias() []*streamer.Media {
+	return []*streamer.Media{
+		{
+			Kind:      streamer.KindVideo,
+			Direction: streamer.DirectionRecvonly,
+			Codecs: []*streamer.Codec{
+				{Name: streamer.CodecH264, ClockRate: 90000},
+			},
+		}, {
+			Kind:      streamer.KindAudio,
+			Direction: streamer.DirectionRecvonly,
+			Codecs: []*streamer.Codec{
+				{Name: streamer.CodecAAC, ClockRate: 16000},
+			},
+		},
+	}
+}
+
+func (c *Consumer) AddTrack(media *streamer.Media, track *streamer.Track) *streamer.Track {
+	codec := track.Codec
+	switch codec.Name {
+	case streamer.CodecH264:
+		idx := int8(len(c.streams))
+
+		sps, pps := h264.GetParameterSet(codec.FmtpLine)
+		stream, err := h264parser.NewCodecDataFromSPSAndPPS(sps, pps)
+		if err != nil {
+			return nil
+		}
+		c.streams = append(c.streams, stream)
+
+		pkt := av.Packet{Idx: idx, CompositionTime: time.Millisecond}
+
+		ts2time := time.Second / time.Duration(codec.ClockRate)
+
+		push := func(packet *rtp.Packet) error {
+			if packet.Version != h264.RTPPacketVersionAVC {
+				return nil
+			}
+
+			switch h264.NALUType(packet.Payload) {
+			case h264.NALUTypeIFrame:
+				c.start = true
+				pkt.IsKeyFrame = true
+			case h264.NALUTypePFrame:
+				if !c.start {
+					return nil
+				}
+			default:
+				return nil
+			}
+
+			pkt.Data = packet.Payload
+			newTime := time.Duration(packet.Timestamp) * ts2time
+			if pkt.Time > 0 {
+				pkt.Duration = newTime - pkt.Time
+			}
+			pkt.Time = newTime
+
+			for _, buf := range c.muxer.WritePacketV5(pkt) {
+				c.send += len(buf)
+				c.Fire(buf)
+			}
+
+			return nil
+		}
+
+		if !h264.IsAVC(codec) {
+			wrapper := h264.RTPDepay(track)
+			push = wrapper(push)
+		}
+
+		return track.Bind(push)
+	}
+
+	panic("unsupported codec")
+}
+
+func (c *Consumer) Init() {
+	c.muxer = mp4f.NewMuxer(nil)
+	if err := c.muxer.WriteHeader(c.streams); err != nil {
+		return
+	}
+
+	codecs, buf := c.muxer.GetInit(c.streams)
+	c.Fire(&streamer.Message{Type: MsgTypeMSE, Value: codecs})
+
+	c.send += len(buf)
+	c.Fire(buf)
+}
+
+//
+
+func (c *Consumer) MarshalJSON() ([]byte, error) {
+	v := map[string]interface{}{
+		"type":        "MSE server consumer",
+		"send":        c.send,
+		"remote_addr": c.RemoteAddr,
+		"user_agent":  c.UserAgent,
+	}
+
+	return json.Marshal(v)
+}