install go2rtc on bob

installs_on_host/go2rtc/pkg/wyoming/api.go

@@ -0,0 +1,99 @@
+package wyoming
+
+import (
+	"bufio"
+	"encoding/json"
+	"io"
+	"net"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+)
+
+type API struct {
+	conn net.Conn
+	rd   *bufio.Reader
+}
+
+func DialAPI(address string) (*API, error) {
+	conn, err := net.DialTimeout("tcp", address, core.ConnDialTimeout)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewAPI(conn), nil
+}
+
+const Version = "1.5.4"
+
+func NewAPI(conn net.Conn) *API {
+	return &API{conn: conn, rd: bufio.NewReader(conn)}
+}
+
+func (w *API) WriteEvent(evt *Event) (err error) {
+	hdr := EventHeader{
+		Type:          evt.Type,
+		Version:       Version,
+		DataLength:    len(evt.Data),
+		PayloadLength: len(evt.Payload),
+	}
+
+	buf, err := json.Marshal(hdr)
+	if err != nil {
+		return err
+	}
+
+	buf = append(buf, '\n')
+	buf = append(buf, evt.Data...)
+	buf = append(buf, evt.Payload...)
+
+	_, err = w.conn.Write(buf)
+	return err
+}
+
+func (w *API) ReadEvent() (*Event, error) {
+	data, err := w.rd.ReadBytes('\n')
+	if err != nil {
+		return nil, err
+	}
+
+	var hdr EventHeader
+	if err = json.Unmarshal(data, &hdr); err != nil {
+		return nil, err
+	}
+
+	evt := Event{Type: hdr.Type}
+
+	if hdr.DataLength > 0 {
+		data = make([]byte, hdr.DataLength)
+		if _, err = io.ReadFull(w.rd, data); err != nil {
+			return nil, err
+		}
+		evt.Data = string(data)
+	}
+
+	if hdr.PayloadLength > 0 {
+		evt.Payload = make([]byte, hdr.PayloadLength)
+		if _, err = io.ReadFull(w.rd, evt.Payload); err != nil {
+			return nil, err
+		}
+	}
+
+	return &evt, nil
+}
+
+func (w *API) Close() error {
+	return w.conn.Close()
+}
+
+type Event struct {
+	Type    string
+	Data    string
+	Payload []byte
+}
+
+type EventHeader struct {
+	Type          string `json:"type"`
+	Version       string `json:"version"`
+	DataLength    int    `json:"data_length,omitempty"`
+	PayloadLength int    `json:"payload_length,omitempty"`
+}