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screensaver.c

00001 /*****************************************************************************
00002  * screensaver.c : disable screen savers when VLC is playing
00003  *****************************************************************************
00004  * Copyright (C) 2003 the VideoLAN team
00005  * $Id: screensaver.c 12580 2005-09-17 12:12:54Z zorglub $
00006  *
00007  * Authors: Sam Hocevar <[email protected]>
00008  *
00009  * This program is free software; you can redistribute it and/or modify
00010  * it under the terms of the GNU General Public License as published by
00011  * the Free Software Foundation; either version 2 of the License, or
00012  * (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
00022  *****************************************************************************/
00023 
00024 /*****************************************************************************
00025  * Preamble
00026  *****************************************************************************/
00027 #include <stdlib.h>
00028 
00029 #include <vlc/vlc.h>
00030 #include <vlc/intf.h>
00031 #include <vlc/aout.h>
00032 #include <vlc/vout.h>
00033 
00034 /*****************************************************************************
00035  * Local prototypes
00036  *****************************************************************************/
00037 static int  Activate     ( vlc_object_t * );
00038 static void Run          ( intf_thread_t *p_intf );
00039 
00040 /*****************************************************************************
00041  * Module descriptor
00042  *****************************************************************************/
00043 vlc_module_begin();
00044     set_description( _("X Screensaver disabler") );
00045     set_capability( "interface", 0 );
00046     set_callbacks( Activate, NULL );
00047 vlc_module_end();
00048 
00049 /*****************************************************************************
00050  * Activate: initialize and create stuff
00051  *****************************************************************************/
00052 static int Activate( vlc_object_t *p_this )
00053 {
00054     intf_thread_t *p_intf = (intf_thread_t*)p_this;
00055 
00056     p_intf->pf_run = Run;
00057 
00058     return VLC_SUCCESS;
00059 }
00060 
00061 /*****************************************************************************
00062  * Run: main thread
00063  *****************************************************************************
00064  * This part of the module is in a separate thread so that we do not have
00065  * too much system() overhead.
00066  *****************************************************************************/
00067 static void Run( intf_thread_t *p_intf )
00068 {
00069     int i_lastcall = 0;
00070 
00071     while( !p_intf->b_die )
00072     {
00073         msleep( 100000 );
00074 
00075         /* Check screensaver every 30 seconds */
00076         if( ++i_lastcall > 300 )
00077         {
00078             vlc_object_t *p_vout;
00079             p_vout = vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
00080             /* If there is a video output, disable xscreensaver */
00081             if( p_vout )
00082             {
00083                 vlc_object_release( p_vout );
00084 
00085                 /* http://www.jwz.org/xscreensaver/faq.html#dvd */
00086                 system( "xscreensaver-command -deactivate >&- 2>&- &" );
00087 
00088                 /* FIXME: add support for other screensavers */
00089             }
00090 
00091             i_lastcall = 0;
00092         }
00093     }
00094 }
00095 

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