install go2rtc on bob

installs_on_host/go2rtc/pkg/mpjpeg/multipart.go

@@ -0,0 +1,60 @@
+package mpjpeg
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"net/http"
+	"net/textproto"
+	"strconv"
+	"strings"
+)
+
+func Next(rd *bufio.Reader) (http.Header, []byte, error) {
+	for {
+		// search next boundary and skip empty lines
+		s, err := rd.ReadString('\n')
+		if err != nil {
+			return nil, nil, err
+		}
+
+		if s == "\r\n" {
+			continue
+		}
+
+		if !strings.HasPrefix(s, "--") {
+			return nil, nil, errors.New("multipart: wrong boundary: " + s)
+		}
+
+		// Foscam G2 has a awful implementation of MJPEG
+		// https://github.com/AlexxIT/go2rtc/issues/1258
+		if b, _ := rd.Peek(2); string(b) == "--" {
+			continue
+		}
+
+		break
+	}
+
+	tp := textproto.NewReader(rd)
+	header, err := tp.ReadMIMEHeader()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	s := header.Get("Content-Length")
+	if s == "" {
+		return nil, nil, errors.New("multipart: no content length")
+	}
+
+	size, err := strconv.Atoi(s)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	buf := make([]byte, size)
+	if _, err = io.ReadFull(rd, buf); err != nil {
+		return nil, nil, err
+	}
+
+	return http.Header(header), buf, nil
+}

installs_on_host/go2rtc/pkg/mpjpeg/producer.go

@@ -0,0 +1,65 @@
+package mpjpeg
+
+import (
+	"bufio"
+	"errors"
+	"io"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/rtp"
+)
+
+type Producer struct {
+	core.Connection
+	rd *bufio.Reader
+}
+
+func Open(rd io.Reader) (*Producer, error) {
+	return &Producer{
+		Connection: core.Connection{
+			ID:         core.NewID(),
+			FormatName: "mpjpeg", // Multipart JPEG
+			Transport:  rd,
+			Medias: []*core.Media{
+				{
+					Kind:      core.KindVideo,
+					Direction: core.DirectionRecvonly,
+					Codecs: []*core.Codec{
+						{
+							Name:        core.CodecJPEG,
+							ClockRate:   90000,
+							PayloadType: core.PayloadTypeRAW,
+						},
+					},
+				},
+			},
+		},
+	}, nil
+}
+
+func (c *Producer) Start() error {
+	if len(c.Receivers) != 1 {
+		return errors.New("mjpeg: no receivers")
+	}
+
+	rd := bufio.NewReader(c.Transport.(io.Reader))
+
+	mjpeg := c.Receivers[0]
+
+	for {
+		_, body, err := Next(rd)
+		if err != nil {
+			return err
+		}
+
+		c.Recv += len(body)
+
+		if mjpeg != nil {
+			packet := &rtp.Packet{
+				Header:  rtp.Header{Timestamp: core.Now90000()},
+				Payload: body,
+			}
+			mjpeg.WriteRTP(packet)
+		}
+	}
+}