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 *****************************************************************************/
34 #include <vlc_input.h>
35 #include <vlc_interface.h>
37 #include <dbus/dbus.h>
39 #define PM_SERVICE "org.freedesktop.PowerManagement"
40 #define PM_PATH "/org/freedesktop/PowerManagement/Inhibit"
41 #define PM_INTERFACE "org.freedesktop.PowerManagement.Inhibit"
43 /*****************************************************************************
45 *****************************************************************************/
46 static int Activate ( vlc_object_t * );
47 static void Deactivate ( vlc_object_t * );
49 static void Run ( intf_thread_t *p_intf );
53 DBusConnection *p_conn;
54 dbus_uint32_t i_cookie;
57 /*****************************************************************************
59 *****************************************************************************/
61 set_description( _("Power Management Inhibiter") );
62 set_capability( "interface", 0 );
63 set_callbacks( Activate, Deactivate );
66 /*****************************************************************************
67 * Activate: initialize and create stuff
68 *****************************************************************************/
69 static int Activate( vlc_object_t *p_this )
71 intf_thread_t *p_intf = (intf_thread_t*)p_this;
77 p_intf->p_sys = (intf_sys_t *) calloc( 1, sizeof( intf_sys_t ) );
82 p_intf->p_sys->i_cookie = 0;
84 dbus_error_init( &error );
85 p_intf->p_sys->p_conn = dbus_bus_get( DBUS_BUS_SESSION, &error );
86 if( !p_intf->p_sys->p_conn )
88 msg_Err( p_this, "Failed to connect to the D-Bus session daemon: %s",
90 dbus_error_free( &error );
91 free( p_intf->p_sys );
98 /*****************************************************************************
99 * Deactivate: uninitialize and cleanup
100 *****************************************************************************/
101 static void Deactivate( vlc_object_t *p_this )
103 intf_thread_t *p_intf = (intf_thread_t*)p_this;
104 dbus_connection_unref( p_intf->p_sys->p_conn );
105 free( p_intf->p_sys );
108 /*****************************************************************************
109 * Inhibit: Notify the power management daemon that it shouldn't suspend
110 * the computer because of inactivity
112 * returns VLC_FALSE if Out of memory, else VLC_TRUE
113 *****************************************************************************/
114 static int Inhibit( intf_thread_t *p_intf )
116 DBusConnection *p_conn;
118 DBusMessageIter args;
119 DBusMessage *p_reply;
121 dbus_error_init( &error );
122 dbus_uint32_t i_cookie;
124 p_conn = p_intf->p_sys->p_conn;
126 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
131 dbus_message_iter_init_append( p_msg, &args );
133 char *psz_app = strdup( PACKAGE );
134 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING, &psz_app ) )
137 dbus_message_unref( p_msg );
142 char *psz_inhibit_reason = strdup( "Playing some media." );
143 if( !psz_inhibit_reason )
145 dbus_message_unref( p_msg );
148 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING,
149 &psz_inhibit_reason ) )
151 free( psz_inhibit_reason );
152 dbus_message_unref( p_msg );
155 free( psz_inhibit_reason );
157 p_reply = dbus_connection_send_with_reply_and_block( p_conn, p_msg,
158 50, &error ); /* blocks 50ms maximum */
160 dbus_message_unref( p_msg );
161 if( p_reply == NULL )
162 { /* g-p-m is not active, or too slow. Better luck next time? */
166 /* extract the cookie from the reply */
167 if( dbus_message_get_args( p_reply, &error,
168 DBUS_TYPE_UINT32, &i_cookie,
169 DBUS_TYPE_INVALID ) == FALSE )
174 /* Save the cookie */
175 p_intf->p_sys->i_cookie = i_cookie;
179 /*****************************************************************************
180 * UnInhibit: Notify the power management daemon that we aren't active anymore
182 * returns VLC_FALSE if Out of memory, else VLC_TRUE
183 *****************************************************************************/
184 static int UnInhibit( intf_thread_t *p_intf )
186 DBusConnection *p_conn;
188 DBusMessageIter args;
190 dbus_error_init( &error );
191 dbus_uint32_t i_cookie;
193 p_conn = p_intf->p_sys->p_conn;
195 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
200 dbus_message_iter_init_append( p_msg, &args );
202 i_cookie = p_intf->p_sys->i_cookie;
203 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_UINT32, &i_cookie ) )
205 dbus_message_unref( p_msg );
209 if( !dbus_connection_send( p_conn, p_msg, NULL ) )
211 dbus_connection_flush( p_conn );
213 dbus_message_unref( p_msg );
215 p_intf->p_sys->i_cookie = 0;
219 /*****************************************************************************
221 *****************************************************************************/
222 static void Run( intf_thread_t *p_intf )
226 input_thread_t *p_input;
229 /* Check playing state every 30 seconds */
230 vlc_object_lock( p_intf );
231 b_quit = vlc_object_timedwait( p_intf, mdate() + 30000000 ) < 0;
232 vlc_object_unlock( p_intf );
237 p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_ANYWHERE );
240 if( PLAYING_S == p_input->i_state && !p_intf->p_sys->i_cookie )
242 if( !Inhibit( p_intf ) )
244 vlc_object_release( p_input );
248 else if( p_intf->p_sys->i_cookie )
250 if( !UnInhibit( p_intf ) )
252 vlc_object_release( p_input );
256 vlc_object_release( p_input );
258 else if( p_intf->p_sys->i_cookie )
260 if( !UnInhibit( p_intf ) )