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>
42 #include <dbus/dbus.h>
44 #define PM_SERVICE "org.freedesktop.PowerManagement"
45 #define PM_PATH "/org/freedesktop/PowerManagement/Inhibit"
46 #define PM_INTERFACE "org.freedesktop.PowerManagement.Inhibit"
48 /*****************************************************************************
50 *****************************************************************************/
51 static int Activate ( vlc_object_t * );
52 static void Deactivate ( vlc_object_t * );
54 static void Run ( intf_thread_t *p_intf );
56 static int Inhibit( intf_thread_t *p_intf );
57 static int UnInhibit( intf_thread_t *p_intf );
61 DBusConnection *p_conn;
62 dbus_uint32_t i_cookie;
65 /*****************************************************************************
67 *****************************************************************************/
69 set_description( N_("Power Management Inhibitor") )
70 set_capability( "interface", 0 )
71 set_callbacks( Activate, Deactivate )
74 /*****************************************************************************
75 * Activate: initialize and create stuff
76 *****************************************************************************/
77 static int Activate( vlc_object_t *p_this )
79 intf_thread_t *p_intf = (intf_thread_t*)p_this;
83 p_intf->p_sys = (intf_sys_t *) calloc( 1, sizeof( intf_sys_t ) );
87 p_intf->p_sys->i_cookie = 0;
89 dbus_error_init( &error );
90 p_intf->p_sys->p_conn = dbus_bus_get( DBUS_BUS_SESSION, &error );
91 if( !p_intf->p_sys->p_conn )
93 msg_Err( p_this, "Failed to connect to the D-Bus session daemon: %s",
95 dbus_error_free( &error );
96 free( p_intf->p_sys );
103 /*****************************************************************************
104 * Deactivate: uninitialize and cleanup
105 *****************************************************************************/
106 static void Deactivate( vlc_object_t *p_this )
108 intf_thread_t *p_intf = (intf_thread_t*)p_this;
109 if( p_intf->p_sys->i_cookie )
112 dbus_connection_unref( p_intf->p_sys->p_conn );
113 free( p_intf->p_sys );
116 /*****************************************************************************
117 * Inhibit: Notify the power management daemon that it shouldn't suspend
118 * the computer because of inactivity
120 * returns false if Out of memory, else true
121 *****************************************************************************/
122 static int Inhibit( intf_thread_t *p_intf )
124 DBusConnection *p_conn;
126 DBusMessageIter args;
127 DBusMessage *p_reply;
128 dbus_uint32_t i_cookie;
130 p_conn = p_intf->p_sys->p_conn;
132 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
137 dbus_message_iter_init_append( p_msg, &args );
139 char *psz_app = strdup( PACKAGE );
141 !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING, &psz_app ) )
144 dbus_message_unref( p_msg );
149 char *psz_inhibit_reason = strdup( "Playing some media." );
150 if( !psz_inhibit_reason )
152 dbus_message_unref( p_msg );
155 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING,
156 &psz_inhibit_reason ) )
158 free( psz_inhibit_reason );
159 dbus_message_unref( p_msg );
162 free( psz_inhibit_reason );
164 p_reply = dbus_connection_send_with_reply_and_block( p_conn, p_msg,
165 50, NULL ); /* blocks 50ms maximum */
166 dbus_message_unref( p_msg );
167 if( p_reply == NULL )
168 { /* g-p-m is not active, or too slow. Better luck next time? */
172 /* extract the cookie from the reply */
173 if( dbus_message_get_args( p_reply, NULL,
174 DBUS_TYPE_UINT32, &i_cookie,
175 DBUS_TYPE_INVALID ) == FALSE )
180 /* Save the cookie */
181 p_intf->p_sys->i_cookie = i_cookie;
185 /*****************************************************************************
186 * UnInhibit: Notify the power management daemon that we aren't active anymore
188 * returns false if Out of memory, else true
189 *****************************************************************************/
190 static int UnInhibit( intf_thread_t *p_intf )
192 DBusConnection *p_conn;
194 DBusMessageIter args;
195 dbus_uint32_t i_cookie;
197 p_conn = p_intf->p_sys->p_conn;
199 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
204 dbus_message_iter_init_append( p_msg, &args );
206 i_cookie = p_intf->p_sys->i_cookie;
207 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_UINT32, &i_cookie ) )
209 dbus_message_unref( p_msg );
213 if( !dbus_connection_send( p_conn, p_msg, NULL ) )
215 dbus_connection_flush( p_conn );
217 dbus_message_unref( p_msg );
219 p_intf->p_sys->i_cookie = 0;
223 /*****************************************************************************
225 *****************************************************************************/
226 static void Run( intf_thread_t *p_intf )
230 input_thread_t *p_input;
232 /* Check playing state every 30 seconds */
233 msleep( 30 * CLOCK_FREQ );
235 p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_ANYWHERE );
238 const int i_state = var_GetInteger( p_input, "state" );
239 vlc_object_release( p_input );
241 if( PLAYING_S == i_state )
243 if( !p_intf->p_sys->i_cookie )
245 if( !Inhibit( p_intf ) )
249 else if( p_intf->p_sys->i_cookie )
251 if( !UnInhibit( p_intf ) )
255 else if( p_intf->p_sys->i_cookie )
257 if( !UnInhibit( p_intf ) )