mirror of
https://code.videolan.org/videolan/vlc
synced 2024-10-15 08:37:59 +02:00
99fab9089e
Missing some cases that I could not test. Also ffmpeg/chroma.c is locked, so I can but leave it broken. Fix is for the remaining modules is obvious and the issue is easy to detect.
314 lines
9.8 KiB
C
314 lines
9.8 KiB
C
/*****************************************************************************
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* screensaver.c : disable screen savers when VLC is playing
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*****************************************************************************
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* Copyright (C) 2006 the VideoLAN team
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* $Id$
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*
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* Authors: Sam Hocevar <sam@zoy.org>
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* Benjamin Pracht <bigben AT videolan DOT org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc/vlc.h>
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#include <vlc_input.h>
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#include <vlc_interface.h>
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#include <vlc_aout.h>
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#include <vlc_vout.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#ifdef HAVE_SIGNAL_H
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# include <signal.h>
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#endif
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#ifdef HAVE_DBUS
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#define DBUS_API_SUBJECT_TO_CHANGE
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#include <dbus/dbus.h>
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#define GS_SERVICE "org.gnome.ScreenSaver"
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#define GS_PATH "/org/gnome/ScreenSaver"
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#define GS_INTERFACE "org.gnome.ScreenSaver"
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#endif
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/* this is for dbus < 0.3 */
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#ifndef HAVE_DBUS_1
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#define dbus_bus_name_has_owner(connection, name, err) dbus_bus_service_exists(connection, name, err)
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#endif
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Activate ( vlc_object_t * );
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static void Deactivate ( vlc_object_t * );
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static void Run ( intf_thread_t *p_intf );
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#ifdef HAVE_DBUS
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static DBusConnection * dbus_init( intf_thread_t *p_intf );
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static void poke_screensaver( intf_thread_t *p_intf,
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DBusConnection *p_connection );
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static void screensaver_send_message_void ( intf_thread_t *p_intf,
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DBusConnection *p_connection,
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const char *psz_name );
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static vlc_bool_t screensaver_is_running( DBusConnection *p_connection );
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struct intf_sys_t
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{
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DBusConnection *p_connection;
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};
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#endif
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin();
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set_description( _("X Screensaver disabler") );
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set_capability( "interface", 0 );
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set_callbacks( Activate, Deactivate );
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vlc_module_end();
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/*****************************************************************************
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* Activate: initialize and create stuff
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*****************************************************************************/
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static int Activate( vlc_object_t *p_this )
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{
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intf_thread_t *p_intf = (intf_thread_t*)p_this;
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p_intf->pf_run = Run;
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#ifdef HAVE_DBUS
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p_intf->p_sys = (intf_sys_t *)malloc( sizeof( intf_sys_t ) );
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if( !p_intf->p_sys ) return VLC_ENOMEM;
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#endif
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Deactivate: uninitialize and cleanup
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*****************************************************************************/
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static void Deactivate( vlc_object_t *p_this )
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{
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#ifdef HAVE_DBUS
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intf_thread_t *p_intf = (intf_thread_t*)p_this;
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if( p_intf->p_sys->p_connection )
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{
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# ifdef HAVE_DBUS_2
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dbus_connection_unref( p_intf->p_sys->p_connection );
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# else
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dbus_connection_disconnect( p_intf->p_sys->p_connection );
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# endif
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}
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if( p_intf->p_sys )
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{
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free( p_intf->p_sys );
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p_intf->p_sys = NULL;
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}
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#endif
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}
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/*****************************************************************************
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* Execute: Spawns a process using execv()
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*****************************************************************************/
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static void Execute( intf_thread_t *p_this, const char *const *ppsz_args )
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{
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pid_t pid = fork();
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switch( pid )
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{
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case 0: /* we're the child */
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{
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sigset_t set;
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sigemptyset (&set);
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pthread_sigmask (SIG_SETMASK, &set, NULL);
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/* We don't want output */
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if( ( freopen( "/dev/null", "w", stdout ) != NULL )
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&& ( freopen( "/dev/null", "w", stderr ) != NULL ) )
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execv( ppsz_args[0] , (char *const *)ppsz_args );
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/* If the file we want to execute doesn't exist we exit() */
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exit( EXIT_FAILURE );
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}
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case -1: /* we're the error */
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msg_Dbg( p_this, "Couldn't fork() while launching %s",
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ppsz_args[0] );
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break;
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default: /* we're the parent */
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/* Wait for the child to exit.
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* We will not deadlock because we ran "/bin/sh &" */
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while( waitpid( pid, NULL, 0 ) != pid);
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break;
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}
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}
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/*****************************************************************************
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* Run: main thread
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*****************************************************************************
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* This part of the module is in a separate thread so that we do not have
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* too much system() overhead.
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*****************************************************************************/
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static void Run( intf_thread_t *p_intf )
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{
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vlc_object_lock( p_intf );
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#ifdef HAVE_DBUS
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p_intf->p_sys->p_connection = dbus_init( p_intf );
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#endif
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while( vlc_object_alive( p_intf ) )
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{
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vlc_object_t *p_vout;
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/* Check screensaver every 30 seconds */
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if( vlc_object_timedwait( p_intf, mdate() + 30000000 ) < 0 )
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continue;
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p_vout = vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
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/* If there is a video output, disable xscreensaver */
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if( p_vout )
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{
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input_thread_t *p_input;
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p_input = vlc_object_find( p_vout, VLC_OBJECT_INPUT, FIND_PARENT );
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vlc_object_release( p_vout );
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if( p_input )
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{
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if( PLAYING_S == p_input->i_state )
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{
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/* http://www.jwz.org/xscreensaver/faq.html#dvd */
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const char *const ppsz_xsargs[] = { "/bin/sh", "-c",
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"xscreensaver-command -deactivate &", (char*)NULL };
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Execute( p_intf, ppsz_xsargs );
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/* If we have dbus support, let's communicate directly
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with gnome-screensave else, run
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gnome-screensaver-command */
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#ifdef HAVE_DBUS
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poke_screensaver( p_intf, p_intf->p_sys->p_connection );
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#else
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const char *const ppsz_gsargs[] = { "/bin/sh", "-c",
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"gnome-screensaver-command --poke &", (char*)NULL };
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Execute( p_intf, ppsz_gsargs );
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#endif
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/* FIXME: add support for other screensavers */
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}
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vlc_object_release( p_input );
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}
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}
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}
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vlc_object_unlock( p_intf );
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}
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#ifdef HAVE_DBUS
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static DBusConnection * dbus_init( intf_thread_t *p_intf )
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{
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DBusError dbus_error;
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dbus_error_init (&dbus_error);
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DBusConnection * p_connection = dbus_bus_get( DBUS_BUS_SESSION, &dbus_error );
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if ( !p_connection )
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{
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msg_Warn( p_intf, "failed to connect to the D-BUS daemon: %s",
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dbus_error.message);
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dbus_error_free( &dbus_error );
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return NULL;
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}
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return p_connection;
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}
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static void poke_screensaver( intf_thread_t *p_intf,
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DBusConnection *p_connection )
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{
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if( screensaver_is_running( p_connection ) )
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{
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# ifdef SCREENSAVER_DEBUG
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msg_Dbg( p_intf, "found a running gnome-screensaver instance" );
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# endif
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/* gnome-screensaver changed it's D-Bus interface, so we need both */
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screensaver_send_message_void( p_intf, p_connection, "Poke" );
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screensaver_send_message_void( p_intf, p_connection,
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"SimulateUserActivity" );
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}
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# ifdef SCREENSAVER_DEBUG
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else
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{
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msg_Dbg( p_intf, "found no running gnome-screensaver instance" );
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}
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# endif
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}
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static void screensaver_send_message_void ( intf_thread_t *p_intf,
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DBusConnection *p_connection,
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const char *psz_name )
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{
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DBusMessage *p_message;
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if( !p_connection || !psz_name ) return;
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p_message = dbus_message_new_method_call( GS_SERVICE, GS_PATH,
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GS_INTERFACE, psz_name );
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if( p_message == NULL )
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{
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msg_Err( p_intf, "DBUS initialization failed: message initialization" );
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return;
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}
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if( !dbus_connection_send( p_connection, p_message, NULL ) )
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{
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msg_Err( p_intf, "DBUS communication failed" );
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}
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dbus_connection_flush( p_connection );
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dbus_message_unref( p_message );
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}
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static vlc_bool_t screensaver_is_running( DBusConnection *p_connection )
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{
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DBusError error;
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vlc_bool_t b_return;
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if( !p_connection ) return VLC_FALSE;
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dbus_error_init( &error );
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b_return = dbus_bus_name_has_owner( p_connection, GS_SERVICE, &error );
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if( dbus_error_is_set( &error ) ) dbus_error_free (&error);
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return b_return;
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}
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#endif
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