install go2rtc on bob

installs_on_host/go2rtc/pkg/y4m/producer.go

@@ -0,0 +1,83 @@
+package y4m
+
+import (
+	"bufio"
+	"errors"
+	"io"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/rtp"
+)
+
+func Open(r io.Reader) (*Producer, error) {
+	rd := bufio.NewReaderSize(r, core.BufferSize)
+	b, err := rd.ReadBytes('\n')
+	if err != nil {
+		return nil, err
+	}
+
+	b = b[:len(b)-1] // remove \n
+
+	fmtp := ParseHeader(b)
+
+	if GetSize(fmtp) == 0 {
+		return nil, errors.New("y4m: unsupported format: " + string(b))
+	}
+
+	medias := []*core.Media{
+		{
+			Kind:      core.KindVideo,
+			Direction: core.DirectionRecvonly,
+			Codecs: []*core.Codec{
+				{
+					Name:        core.CodecRAW,
+					ClockRate:   90000,
+					FmtpLine:    fmtp,
+					PayloadType: core.PayloadTypeRAW,
+				},
+			},
+		},
+	}
+	return &Producer{
+		Connection: core.Connection{
+			ID:         core.NewID(),
+			FormatName: "yuv4mpegpipe",
+			Medias:     medias,
+			SDP:        string(b),
+			Transport:  r,
+		},
+		rd: rd,
+	}, nil
+}
+
+type Producer struct {
+	core.Connection
+	rd *bufio.Reader
+}
+
+func (c *Producer) Start() error {
+	size := GetSize(c.Medias[0].Codecs[0].FmtpLine)
+
+	for {
+		if _, err := c.rd.Discard(len(frameHdr)); err != nil {
+			return err
+		}
+
+		frame := make([]byte, size)
+		if _, err := io.ReadFull(c.rd, frame); err != nil {
+			return err
+		}
+
+		c.Recv += size
+
+		if len(c.Receivers) == 0 {
+			continue
+		}
+
+		pkt := &rtp.Packet{
+			Header:  rtp.Header{Timestamp: core.Now90000()},
+			Payload: frame,
+		}
+		c.Receivers[0].WriteRTP(pkt)
+	}
+}