Add support gopro source

internal/gopro/gopro.go

@@ -0,0 +1,30 @@
+package gopro
+
+import (
+	"net/http"
+
+	"github.com/AlexxIT/go2rtc/internal/api"
+	"github.com/AlexxIT/go2rtc/internal/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/gopro"
+)
+
+func Init() {
+	streams.HandleFunc("gopro", handleGoPro)
+
+	api.HandleFunc("api/gopro", apiGoPro)
+}
+
+func handleGoPro(rawURL string) (core.Producer, error) {
+	return gopro.Dial(rawURL)
+}
+
+func apiGoPro(w http.ResponseWriter, r *http.Request) {
+	var items []*api.Source
+
+	for _, host := range gopro.Discovery() {
+		items = append(items, &api.Source{Name: host, URL: "gopro://" + host})
+	}
+
+	api.ResponseSources(w, items)
+}

main.go

@@ -11,6 +11,7 @@ import (
 	"github.com/AlexxIT/go2rtc/internal/exec"
 	"github.com/AlexxIT/go2rtc/internal/expr"
 	"github.com/AlexxIT/go2rtc/internal/ffmpeg"
+	"github.com/AlexxIT/go2rtc/internal/gopro"
 	"github.com/AlexxIT/go2rtc/internal/hass"
 	"github.com/AlexxIT/go2rtc/internal/hls"
 	"github.com/AlexxIT/go2rtc/internal/homekit"
@@ -78,6 +79,7 @@ func main() {
 	nest.Init()     // nest source
 	bubble.Init()   // bubble source
 	expr.Init()     // expr source
+	gopro.Init()    // gopro source
 
 	// 6. Helper modules
 

pkg/gopro/discovery.go

@@ -0,0 +1,43 @@
+package gopro
+
+import (
+	"net"
+	"net/http"
+	"regexp"
+)
+
+func Discovery() (urls []string) {
+	ints, err := net.Interfaces()
+	if err != nil {
+		return nil
+	}
+
+	// The socket address for USB connections is 172.2X.1YZ.51:8080
+	// https://gopro.github.io/OpenGoPro/http_2_0#socket-address
+	re := regexp.MustCompile(`^172\.2\d\.1\d\d\.`)
+
+	for _, itf := range ints {
+		addrs, err := itf.Addrs()
+		if err != nil {
+			continue
+		}
+
+		for _, addr := range addrs {
+			host := addr.String()
+			if !re.MatchString(host) {
+				continue
+			}
+
+			host = host[:11] + "51" // 172.2x.1xx.xxx
+			res, err := http.Get("http://" + host + ":8080/gopro/webcam/status")
+			if err != nil {
+				continue
+			}
+			_ = res.Body.Close()
+
+			urls = append(urls, host)
+		}
+	}
+
+	return
+}

pkg/gopro/gopro.go

@@ -0,0 +1,117 @@
+package gopro
+
+import (
+	"errors"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/mpegts"
+)
+
+func Dial(rawURL string) (core.Producer, error) {
+	u, err := url.Parse(rawURL)
+	if err != nil {
+		return nil, err
+	}
+
+	r := &listener{host: u.Host}
+
+	if err = r.command("/gopro/webcam/stop"); err != nil {
+		return nil, err
+	}
+
+	if err = r.listen(); err != nil {
+		return nil, err
+	}
+
+	if err = r.command("/gopro/webcam/start"); err != nil {
+		return nil, err
+	}
+
+	return mpegts.Open(r)
+}
+
+type listener struct {
+	conn    net.PacketConn
+	host    string
+	packet  []byte
+	packets chan []byte
+}
+
+func (r *listener) Read(p []byte) (n int, err error) {
+	if r.packet == nil {
+		var ok bool
+		if r.packet, ok = <-r.packets; !ok {
+			return 0, io.EOF // channel closed
+		}
+	}
+
+	n = copy(p, r.packet)
+
+	if n < len(r.packet) {
+		r.packet = r.packet[n:]
+	} else {
+		r.packet = nil
+	}
+
+	return
+}
+
+func (r *listener) Close() error {
+	return r.conn.Close()
+}
+
+func (r *listener) command(api string) error {
+	client := &http.Client{Timeout: 5 * time.Second}
+
+	res, err := client.Get("http://" + r.host + ":8080" + api)
+	if err != nil {
+		return err
+	}
+
+	_ = res.Body.Close()
+
+	if res.StatusCode != http.StatusOK {
+		return errors.New("gopro: wrong response: " + res.Status)
+	}
+
+	return nil
+}
+
+func (r *listener) listen() (err error) {
+	if r.conn, err = net.ListenPacket("udp4", ":8554"); err != nil {
+		return
+	}
+
+	r.packets = make(chan []byte, 1024)
+	go r.worker()
+
+	return
+}
+
+func (r *listener) worker() {
+	b := make([]byte, 1500)
+	for {
+		if err := r.conn.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
+			break
+		}
+
+		n, _, err := r.conn.ReadFrom(b)
+		if err != nil {
+			break
+		}
+
+		packet := make([]byte, n)
+		copy(packet, b)
+
+		r.packets <- packet
+	}
+
+	close(r.packets)
+
+	_ = r.command("/gopro/webcam/stop")
+}

www/add.html

@@ -246,6 +246,18 @@
 </script>
 
 
+<button id="gopro">GoPro</button>
+<div class="module">
+    <table id="gopro-table"></table>
+</div>
+<script>
+    document.getElementById('gopro').addEventListener('click', async ev => {
+        ev.target.nextElementSibling.style.display = 'block';
+        await getSources('gopro-table', 'api/gopro');
+    });
+</script>
+
+
 <button id="hass">Home Assistant</button>
 <div class="module">
     <table id="hass-table"></table>