1 /*****************************************************************************
2 * inhibit.c : prevents the computer from suspending when VLC is playing
3 *****************************************************************************
4 * Copyright © 2007 Rafaël Carré
7 * Author: Rafaël Carré <funman@videolanorg>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
25 * Based on freedesktop Power Management Specification version 0.2
26 * http://people.freedesktop.org/~hughsient/temp/power-management-spec-0.2.html
29 /*****************************************************************************
31 *****************************************************************************/
37 #include <vlc_common.h>
38 #include <vlc_plugin.h>
39 #include <vlc_input.h>
40 #include <vlc_interface.h>
41 #include <vlc_playlist.h>
43 #include <dbus/dbus.h>
45 #define PM_SERVICE "org.freedesktop.PowerManagement"
46 #define PM_PATH "/org/freedesktop/PowerManagement/Inhibit"
47 #define PM_INTERFACE "org.freedesktop.PowerManagement.Inhibit"
49 /*****************************************************************************
51 *****************************************************************************/
52 static int Activate ( vlc_object_t * );
53 static void Deactivate ( vlc_object_t * );
55 static void Run ( intf_thread_t *p_intf );
57 static int Inhibit( intf_thread_t *p_intf );
58 static int UnInhibit( intf_thread_t *p_intf );
62 DBusConnection *p_conn;
63 dbus_uint32_t i_cookie;
66 /*****************************************************************************
68 *****************************************************************************/
70 set_description( N_("Power Management Inhibitor") )
71 set_capability( "interface", 0 )
72 set_callbacks( Activate, Deactivate )
75 /*****************************************************************************
76 * Activate: initialize and create stuff
77 *****************************************************************************/
78 static int Activate( vlc_object_t *p_this )
80 intf_thread_t *p_intf = (intf_thread_t*)p_this;
84 p_intf->p_sys = (intf_sys_t *) calloc( 1, sizeof( intf_sys_t ) );
88 p_intf->p_sys->i_cookie = 0;
90 dbus_error_init( &error );
91 p_intf->p_sys->p_conn = dbus_bus_get( DBUS_BUS_SESSION, &error );
92 if( !p_intf->p_sys->p_conn )
94 msg_Err( p_this, "Failed to connect to the D-Bus session daemon: %s",
96 dbus_error_free( &error );
97 free( p_intf->p_sys );
104 /*****************************************************************************
105 * Deactivate: uninitialize and cleanup
106 *****************************************************************************/
107 static void Deactivate( vlc_object_t *p_this )
109 intf_thread_t *p_intf = (intf_thread_t*)p_this;
110 if( p_intf->p_sys->i_cookie )
113 dbus_connection_unref( p_intf->p_sys->p_conn );
114 free( p_intf->p_sys );
117 /*****************************************************************************
118 * Inhibit: Notify the power management daemon that it shouldn't suspend
119 * the computer because of inactivity
121 * returns false if Out of memory, else true
122 *****************************************************************************/
123 static int Inhibit( intf_thread_t *p_intf )
125 DBusConnection *p_conn;
127 DBusMessageIter args;
128 DBusMessage *p_reply;
129 dbus_uint32_t i_cookie;
131 p_conn = p_intf->p_sys->p_conn;
133 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
138 dbus_message_iter_init_append( p_msg, &args );
140 char *psz_app = strdup( PACKAGE );
142 !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING, &psz_app ) )
145 dbus_message_unref( p_msg );
150 char *psz_inhibit_reason = strdup( _("Playing some media.") );
151 if( !psz_inhibit_reason )
153 dbus_message_unref( p_msg );
156 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING,
157 &psz_inhibit_reason ) )
159 free( psz_inhibit_reason );
160 dbus_message_unref( p_msg );
163 free( psz_inhibit_reason );
165 p_reply = dbus_connection_send_with_reply_and_block( p_conn, p_msg,
166 50, NULL ); /* blocks 50ms maximum */
167 dbus_message_unref( p_msg );
168 if( p_reply == NULL )
169 { /* g-p-m is not active, or too slow. Better luck next time? */
173 /* extract the cookie from the reply */
174 if( dbus_message_get_args( p_reply, NULL,
175 DBUS_TYPE_UINT32, &i_cookie,
176 DBUS_TYPE_INVALID ) == FALSE )
181 /* Save the cookie */
182 p_intf->p_sys->i_cookie = i_cookie;
186 /*****************************************************************************
187 * UnInhibit: Notify the power management daemon that we aren't active anymore
189 * returns false if Out of memory, else true
190 *****************************************************************************/
191 static int UnInhibit( intf_thread_t *p_intf )
193 DBusConnection *p_conn;
195 DBusMessageIter args;
196 dbus_uint32_t i_cookie;
198 p_conn = p_intf->p_sys->p_conn;
200 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
205 dbus_message_iter_init_append( p_msg, &args );
207 i_cookie = p_intf->p_sys->i_cookie;
208 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_UINT32, &i_cookie ) )
210 dbus_message_unref( p_msg );
214 if( !dbus_connection_send( p_conn, p_msg, NULL ) )
216 dbus_connection_flush( p_conn );
218 dbus_message_unref( p_msg );
220 p_intf->p_sys->i_cookie = 0;
224 /*****************************************************************************
226 *****************************************************************************/
227 static void Run( intf_thread_t *p_intf )
230 playlist_t *p_playlist = pl_Hold( p_intf );
231 input_thread_t *p_input;
235 /* Check playing state every 30 seconds */
236 msleep( 30 * CLOCK_FREQ );
238 p_input = playlist_CurrentInput( p_playlist );
241 const int i_state = var_GetInteger( p_input, "state" );
242 vlc_object_release( p_input );
244 if( PLAYING_S == i_state )
246 if( !p_intf->p_sys->i_cookie )
248 if( !Inhibit( p_intf ) )
252 else if( p_intf->p_sys->i_cookie )
254 if( !UnInhibit( p_intf ) )
258 else if( p_intf->p_sys->i_cookie )
260 if( !UnInhibit( p_intf ) )
265 pl_Release( p_intf );