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Add --lazy to open the camera only while clients are connected, issue #21

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This commit is contained in:
Milan Nikolic
2026-06-30 16:42:40 +02:00
parent 029d0bef08
commit d09d78bc5f
4 changed files with 64 additions and 23 deletions
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47
cmd/cam2ip/main.go
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@@ -10,6 +10,7 @@ import (
"go.senan.xyz/flagconf"
"github.com/gen2brain/cam2ip/camera"
"github.com/gen2brain/cam2ip/handlers"
"github.com/gen2brain/cam2ip/server"
)
@@ -57,6 +58,7 @@ func main() {
flag.StringVar(&srv.TimeFormat, "time-format", "2006-01-02 15:04:05", "Time format [CAM2IP_TIME_FORMAT]")
flag.StringVar(&srv.Bind, "bind-addr", ":56000", "Bind address [CAM2IP_BIND_ADDR]")
flag.StringVar(&srv.Htpasswd, "htpasswd-file", "", "Path to htpasswd file, if empty auth is disabled [CAM2IP_HTPASSWD_FILE]")
flag.BoolVar(&srv.Lazy, "lazy", false, "Open the camera only while clients are connected [CAM2IP_LAZY]")
var showVersion bool
flag.BoolVar(&showVersion, "version", false, "Print version and exit")
@@ -69,7 +71,7 @@ func main() {
stderr("%s %s [<flags>]\n", colorize(color, colorBold, "Usage:"), name)
order := []string{"index", "device", "delay", "width", "height", "quality", "rotate", "flip", "no-webgl",
"timestamp", "time-format", "bind-addr", "htpasswd-file", "list-devices", "version"}
"timestamp", "time-format", "bind-addr", "htpasswd-file", "lazy", "list-devices", "version"}
for _, name := range order {
f := flag.Lookup(name)
@@ -121,7 +123,7 @@ func main() {
}
}
cam, err := camera.New(camera.Options{
opts := camera.Options{
Index: srv.Index,
Rotate: srv.Rotate,
Flip: srv.Flip,
@@ -129,26 +131,37 @@ func main() {
Height: srv.Height,
Timestamp: srv.Timestamp,
TimeFormat: srv.TimeFormat,
})
if err != nil {
stderr("%s\n", err.Error())
os.Exit(1)
}
srv.Reader = cam
defer srv.Reader.Close()
info := cam.Info()
desc := fmt.Sprintf("%dx%d %s", info.Width, info.Height, info.Format)
if dn := deviceName(srv.Index); dn != "" {
desc = dn + ", " + desc
srv.Open = func() (handlers.ImageReader, error) {
return camera.New(opts)
}
stderr("%s %s [%s] listening on %s\n", name, version, desc, srv.Bind)
if srv.Lazy {
stderr("%s %s [lazy] listening on %s\n", name, version, srv.Bind)
} else {
cam, err := camera.New(opts)
if err != nil {
stderr("%s\n", err.Error())
os.Exit(1)
}
err = srv.ListenAndServe()
if err != nil {
defer cam.Close()
srv.Open = func() (handlers.ImageReader, error) {
return cam, nil
}
info := cam.Info()
desc := fmt.Sprintf("%dx%d %s", info.Width, info.Height, info.Format)
if dn := deviceName(srv.Index); dn != "" {
desc = dn + ", " + desc
}
stderr("%s %s [%s] listening on %s\n", name, version, desc, srv.Bind)
}
if err := srv.ListenAndServe(); err != nil {
stderr("%s\n", err.Error())
os.Exit(1)
}