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 *****************************************************************************/
38 #include <vlc_input.h>
39 #include <vlc_interface.h>
41 #include <dbus/dbus.h>
43 #define PM_SERVICE "org.freedesktop.PowerManagement"
44 #define PM_PATH "/org/freedesktop/PowerManagement/Inhibit"
45 #define PM_INTERFACE "org.freedesktop.PowerManagement.Inhibit"
47 /*****************************************************************************
49 *****************************************************************************/
50 static int Activate ( vlc_object_t * );
51 static void Deactivate ( vlc_object_t * );
53 static void Run ( intf_thread_t *p_intf );
57 DBusConnection *p_conn;
58 dbus_uint32_t i_cookie;
61 /*****************************************************************************
63 *****************************************************************************/
65 set_description( _("Power Management Inhibitor") );
66 set_capability( "interface", 0 );
67 set_callbacks( Activate, Deactivate );
70 /*****************************************************************************
71 * Activate: initialize and create stuff
72 *****************************************************************************/
73 static int Activate( vlc_object_t *p_this )
75 intf_thread_t *p_intf = (intf_thread_t*)p_this;
81 p_intf->p_sys = (intf_sys_t *) calloc( 1, sizeof( intf_sys_t ) );
86 p_intf->p_sys->i_cookie = 0;
88 dbus_error_init( &error );
89 p_intf->p_sys->p_conn = dbus_bus_get( DBUS_BUS_SESSION, &error );
90 if( !p_intf->p_sys->p_conn )
92 msg_Err( p_this, "Failed to connect to the D-Bus session daemon: %s",
94 dbus_error_free( &error );
95 free( p_intf->p_sys );
102 /*****************************************************************************
103 * Deactivate: uninitialize and cleanup
104 *****************************************************************************/
105 static void Deactivate( vlc_object_t *p_this )
107 intf_thread_t *p_intf = (intf_thread_t*)p_this;
108 dbus_connection_unref( p_intf->p_sys->p_conn );
109 free( p_intf->p_sys );
112 /*****************************************************************************
113 * Inhibit: Notify the power management daemon that it shouldn't suspend
114 * the computer because of inactivity
116 * returns VLC_FALSE if Out of memory, else VLC_TRUE
117 *****************************************************************************/
118 static int Inhibit( intf_thread_t *p_intf )
120 DBusConnection *p_conn;
122 DBusMessageIter args;
123 DBusMessage *p_reply;
125 dbus_error_init( &error );
126 dbus_uint32_t i_cookie;
128 p_conn = p_intf->p_sys->p_conn;
130 p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
135 dbus_message_iter_init_append( p_msg, &args );
137 char *psz_app = strdup( PACKAGE );
138 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING, &psz_app ) )
141 dbus_message_unref( p_msg );
146 char *psz_inhibit_reason = strdup( "Playing some media." );
147 if( !psz_inhibit_reason )
149 dbus_message_unref( p_msg );
152 if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING,
153 &psz_inhibit_reason ) )
155 free( psz_inhibit_reason );
156 dbus_message_unref( p_msg );
159 free( psz_inhibit_reason );
161 p_reply = dbus_connection_send_with_reply_and_block( p_conn, p_msg,
162 50, &error ); /* blocks 50ms maximum */
164 dbus_message_unref( p_msg );
165 if( p_reply == NULL )
166 { /* g-p-m is not active, or too slow. Better luck next time? */
170 /* extract the cookie from the reply */
171 if( dbus_message_get_args( p_reply, &error,
172 DBUS_TYPE_UINT32, &i_cookie,
173 DBUS_TYPE_INVALID ) == FALSE )
178 /* Save the cookie */
179 p_intf->p_sys->i_cookie = i_cookie;
183 /*****************************************************************************
184 * UnInhibit: Notify the power management daemon that we aren't active anymore
186 * returns VLC_FALSE if Out of memory, else VLC_TRUE
187 *****************************************************************************/
188 static int UnInhibit( intf_thread_t *p_intf )
190 DBusConnection *p_conn;
192 DBusMessageIter args;
194 dbus_error_init( &error );
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 )
228 vlc_object_lock( p_intf );
231 input_thread_t *p_input;
233 /* Check playing state every 30 seconds */
234 if( vlc_object_timedwait( p_intf, mdate() + 30000000 ) < 0 )
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 ) )
266 vlc_object_unlock( p_intf );