Start adapting new streamforward to Android

pkg/recoder/libav/saferecoder/process/init_libav.go

@@ -0,0 +1,49 @@
+//go:build with_libav
+// +build with_libav
+
+package process
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net"
+	"os"
+
+	"github.com/facebookincubator/go-belt"
+	"github.com/xaionaro-go/streamctl/pkg/recoder/libav/saferecoder/process/server"
+)
+
+const (
+	EnvKeyIsRecoder = "IS_STREAMPANEL_RECODER"
+)
+
+func init() {
+	if os.Getenv(EnvKeyIsRecoder) != "" {
+		runRecoder()
+		belt.Flush(context.TODO())
+		os.Exit(0)
+	}
+}
+
+func runRecoder() {
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		panic(fmt.Errorf("failed to listen: %w", err))
+	}
+	defer listener.Close()
+
+	d := ReturnedData{
+		ListenAddr: listener.Addr().String(),
+	}
+	b, err := json.Marshal(d)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Fprintf(os.Stdout, "%s\n", b)
+
+	srv := server.NewServer()
+	err = srv.Serve(context.TODO(), listener)
+	panic(err)
+}