Enforce --no-overlay option in SDL video output.

modules/video_output/sdl.c

@@ -162,6 +162,8 @@ static int Open ( vlc_object_t *p_this )
         return VLC_ENOMEM;
     }
 
+    memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
+
     /* Check if SDL video module has been initialized */
     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
     {
@@ -762,6 +764,8 @@ static int OpenDisplay( vout_thread_t *p_vout )
     char *psz_chroma = NULL;
     uint32_t i_chroma = 0;
 
+    bool b_overlay = config_GetInt( p_vout, "overlay" );
+
     /* Set main window's size */
 #if SDL_VERSION_ATLEAST(1,2,10)
     p_vout->p_sys->i_width = p_vout->b_fullscreen ? p_vout->p_sys->i_desktop_width :
@@ -813,6 +817,8 @@ static int OpenDisplay( vout_thread_t *p_vout )
         }
     }
 
+    if( b_overlay )
+    {
         /* Choose the chroma we will try first. */
         do
         {
@@ -877,11 +883,16 @@ static int OpenDisplay( vout_thread_t *p_vout )
                 SDL_CreateYUVOverlay( 32, 32, SDL_YUY2_OVERLAY,
                                       p_vout->p_sys->p_display );
         }
+    }
 
     if( p_vout->p_sys->p_overlay == NULL )
     {
+        if( b_overlay )
             msg_Warn( p_vout, "no SDL overlay for 0x%.8x (%4.4s)",
-                  p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma );
+                      p_vout->render.i_chroma,
+                      (char*)&p_vout->render.i_chroma );
+        else
+            msg_Warn( p_vout, "SDL overlay disabled by the user" );
 
         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
         {