gst-play: Add wait-on-eos option for image file playback

Since gst-play is stopping playback on EOS message, image file playback
is almost impossible until now. Not only for image file, this option
seems to helpful if an user wants to see the last frame.

tools/gst-play.c

@@ -43,6 +43,8 @@
 
 #define VOLUME_STEPS 20
 
+static gboolean wait_on_eos = FALSE;
+
 GST_DEBUG_CATEGORY (play_debug);
 #define GST_CAT_DEFAULT play_debug
 
@@ -394,7 +396,7 @@ play_bus_msg (GstBus * bus, GstMessage * msg, gpointer user_data)
       play_timeout (play);
       g_print ("\n");
       /* and switch to next item in list */
-      if (!play_next (play)) {
+      if (!wait_on_eos && !play_next (play)) {
         g_print ("%s\n", _("Reached end of play list."));
         g_main_loop_quit (play->loop);
       }
@@ -1461,6 +1463,11 @@ main (int argc, char **argv)
           N_("Use playbin3 pipeline")
           N_("(default varies depending on 'USE_PLAYBIN' env variable)"),
         NULL},
+    {"wait-on-eos", 0, 0, G_OPTION_ARG_NONE, &wait_on_eos,
+          N_
+          ("Keep showing the last frame on EOS until quit or playlist change command "
+              "(gapless is ignored)"),
+        NULL},
     {G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL},
     {NULL}
   };
@@ -1506,6 +1513,9 @@ main (int argc, char **argv)
     return 0;
   }
 
+  if (wait_on_eos)
+    gapless = FALSE;
+
   playlist = g_ptr_array_new ();
 
   if (playlist_file != NULL) {