gst-launch: accept option to set program name

The option --prog-name="PROGRAM-NAME" can be passed to set the program name.
The program name is used by gtk and gstreamer to set the class or app-id.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5263>

subprojects/gst-plugins-bad/gst-libs/gst/vulkan/wayland/gstvkwindow_wayland.c

@@ -122,6 +122,11 @@ create_xdg_surface (GstVulkanWindowWayland * window_wl)
 
   /* Then the XDG top-level */
   xdg_toplevel = xdg_surface_get_toplevel (xdg_surface);
+  if (g_get_prgname ()) {
+    xdg_toplevel_set_app_id (xdg_toplevel, g_get_prgname ());
+  } else {
+    xdg_toplevel_set_app_id (xdg_toplevel, "org.gstreamer.wayland");
+  }
   xdg_toplevel_set_title (xdg_toplevel, "Vulkan Renderer");
   xdg_toplevel_add_listener (xdg_toplevel, &xdg_toplevel_listener, window_wl);
 

subprojects/gst-plugins-bad/gst-libs/gst/wayland/gstwlwindow.c

@@ -307,6 +307,11 @@ gst_wl_window_new_toplevel (GstWlDisplay * display, const GstVideoInfo * info,
     }
     xdg_toplevel_add_listener (priv->xdg_toplevel,
         &xdg_toplevel_listener, self);
+    if (g_get_prgname ()) {
+      xdg_toplevel_set_app_id (priv->xdg_toplevel, g_get_prgname ());
+    } else {
+      xdg_toplevel_set_app_id (priv->xdg_toplevel, "org.gstreamer.wayland");
+    }
 
     gst_wl_window_ensure_fullscreen (self, fullscreen);
 

subprojects/gst-plugins-base/gst-libs/gst/gl/wayland/gstglwindow_wayland_egl.c

@@ -305,6 +305,11 @@ create_xdg_surface_and_toplevel (GstGLWindowWaylandEGL * window_egl)
 
   /* Then the XDG top-level */
   xdg_toplevel = xdg_surface_get_toplevel (xdg_surface);
+  if (g_get_prgname ()) {
+    xdg_toplevel_set_app_id (xdg_toplevel, g_get_prgname ());
+  } else {
+    xdg_toplevel_set_app_id (xdg_toplevel, "org.gstreamer.wayland");
+  }
   xdg_toplevel_set_title (xdg_toplevel, "OpenGL Renderer");
   xdg_toplevel_add_listener (xdg_toplevel, &xdg_toplevel_listener, window_egl);
 

subprojects/gstreamer-vaapi/gst-libs/gst/vaapi/gstvaapiwindow_wayland.c

@@ -222,6 +222,11 @@ gst_vaapi_window_wayland_show (GstVaapiWindow * window)
   /* Create a toplevel window out of it */
   priv->xdg_toplevel = xdg_surface_get_toplevel (priv->xdg_surface);
   g_return_val_if_fail (priv->xdg_toplevel, FALSE);
+  if (g_get_prgname ()) {
+    xdg_toplevel_set_app_id (priv->xdg_toplevel, g_get_prgname ());
+  } else {
+    xdg_toplevel_set_app_id (priv->xdg_toplevel, "org.gstreamer.wayland");
+  }
   xdg_toplevel_set_title (priv->xdg_toplevel, "VA-API Wayland window");
   wl_proxy_set_queue ((struct wl_proxy *) priv->xdg_toplevel,
       priv->event_queue);

subprojects/gstreamer/tools/gst-launch.c

@@ -80,6 +80,7 @@ static gboolean toc = FALSE;
 static gboolean messages = FALSE;
 static gboolean eos_on_shutdown = FALSE;
 static gchar **exclude_args = NULL;
+static gchar *prog_name = NULL;
 
 /* pipeline status */
 static gboolean is_live = FALSE;
@@ -1102,6 +1103,9 @@ real_main (int argc, char *argv[])
           N_("Do not output status information for the specified property "
               "if verbose output is enabled (can be used multiple times)"),
         N_("PROPERTY-NAME")},
+    {"prog-name", 'p', 0, G_OPTION_ARG_STRING, &prog_name,
+          N_("Set the name of the program"),
+        N_("PROGRAM-NAME")},
     {"no-fault", 'f', 0, G_OPTION_ARG_NONE, &no_fault,
         N_("Do not install a fault handler"), NULL},
     {"eos-on-shutdown", 'e', 0, G_OPTION_ARG_NONE, &eos_on_shutdown,
@@ -1178,6 +1182,12 @@ real_main (int argc, char *argv[])
   gst_init (&argc, &argv);
 #endif
 
+  if (prog_name) {
+    g_set_prgname (prog_name);
+  } else if (!g_get_prgname ()) {
+    g_set_prgname ((const gchar *) argv[0]);
+  }
+
 #ifdef G_OS_WIN32
   argc = g_strv_length (argv);
 #endif