--- /dev/null
+/*****************************************************************************
+ * inhibit.c : prevents the computer from suspending when VLC is playing
+ *****************************************************************************
+ * Copyright © 2007 Rafaël Carré
+ * $Id$
+ *
+ * Author: Rafaël Carré <funman@videolanorg>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*
+ * Based on freedesktop Power Management Specification version 0.2
+ * http://people.freedesktop.org/~hughsient/temp/power-management-spec-0.2.html
+ */
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#include <vlc/vlc.h>
+#include <vlc_input.h>
+#include <vlc_interface.h>
+
+#include <dbus/dbus.h>
+
+#define PM_SERVICE "org.freedesktop.PowerManagement"
+#define PM_PATH "/org/freedesktop/PowerManagement/Inhibit"
+#define PM_INTERFACE "org.freedesktop.PowerManagement.Inhibit"
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Activate ( vlc_object_t * );
+static void Deactivate ( vlc_object_t * );
+
+static void Run ( intf_thread_t *p_intf );
+
+struct intf_sys_t
+{
+ DBusConnection *p_conn;
+ dbus_uint32_t i_cookie;
+};
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_description( _("Power Management Inhibiter") );
+ set_capability( "interface", 0 );
+ set_callbacks( Activate, Deactivate );
+vlc_module_end();
+
+/*****************************************************************************
+ * Activate: initialize and create stuff
+ *****************************************************************************/
+static int Activate( vlc_object_t *p_this )
+{
+ intf_thread_t *p_intf = (intf_thread_t*)p_this;
+ DBusError error;
+
+
+ p_intf->pf_run = Run;
+
+ p_intf->p_sys = (intf_sys_t *) calloc( 1, sizeof( intf_sys_t ) );
+
+ if( !p_intf->p_sys )
+ return VLC_ENOMEM;
+
+ p_intf->p_sys->i_cookie = 0;
+
+ dbus_error_init( &error );
+ p_intf->p_sys->p_conn = dbus_bus_get( DBUS_BUS_SESSION, &error );
+ if( !p_intf->p_sys->p_conn )
+ {
+ msg_Err( p_this, "Failed to connect to the D-Bus session daemon: %s",
+ error.message );
+ dbus_error_free( &error );
+ free( p_intf->p_sys );
+ return VLC_EGENERIC;
+ }
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Deactivate: uninitialize and cleanup
+ *****************************************************************************/
+static void Deactivate( vlc_object_t *p_this )
+{
+ intf_thread_t *p_intf = (intf_thread_t*)p_this;
+ dbus_connection_unref( p_intf->p_sys->p_conn );
+ free( p_intf->p_sys );
+}
+
+/*****************************************************************************
+ * Inhibit: Notify the power management daemon that it shouldn't suspend
+ * the computer because of inactivity
+ *
+ * returns VLC_FALSE if Out of memory, else VLC_TRUE
+ *****************************************************************************/
+static int Inhibit( intf_thread_t *p_intf )
+{
+ DBusConnection *p_conn;
+ DBusMessage *p_msg;
+ DBusMessageIter args;
+ DBusMessage *p_reply;
+ DBusError error;
+ dbus_error_init( &error );
+ dbus_uint32_t i_cookie;
+
+ p_conn = p_intf->p_sys->p_conn;
+
+ p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
+ "Inhibit" );
+ if( !p_msg )
+ return VLC_FALSE;
+
+ dbus_message_iter_init_append( p_msg, &args );
+
+ char *psz_app = strdup( PACKAGE );
+ if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING, &psz_app ) )
+ {
+ free( psz_app );
+ dbus_message_unref( p_msg );
+ return VLC_FALSE;
+ }
+ free( psz_app );
+
+ char *psz_inhibit_reason = strdup( "Playing some media." );
+ if( !psz_inhibit_reason )
+ {
+ dbus_message_unref( p_msg );
+ return VLC_FALSE;
+ }
+ if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING,
+ &psz_inhibit_reason ) )
+ {
+ free( psz_inhibit_reason );
+ dbus_message_unref( p_msg );
+ return VLC_FALSE;
+ }
+ free( psz_inhibit_reason );
+
+ p_reply = dbus_connection_send_with_reply_and_block( p_conn, p_msg,
+ 50, &error ); /* blocks 50ms maximum */
+
+ dbus_message_unref( p_msg );
+ if( p_reply == NULL )
+ { /* g-p-m is not active, or too slow. Better luck next time? */
+ return VLC_TRUE;
+ }
+
+ /* extract the cookie from the reply */
+ if( dbus_message_get_args( p_reply, &error,
+ DBUS_TYPE_UINT32, &i_cookie,
+ DBUS_TYPE_INVALID ) == FALSE )
+ {
+ return VLC_FALSE;
+ }
+
+ /* Save the cookie */
+ p_intf->p_sys->i_cookie = i_cookie;
+ return VLC_TRUE;
+}
+
+/*****************************************************************************
+ * UnInhibit: Notify the power management daemon that we aren't active anymore
+ *
+ * returns VLC_FALSE if Out of memory, else VLC_TRUE
+ *****************************************************************************/
+static int UnInhibit( intf_thread_t *p_intf )
+{
+ DBusConnection *p_conn;
+ DBusMessage *p_msg;
+ DBusMessageIter args;
+ DBusError error;
+ dbus_error_init( &error );
+ dbus_uint32_t i_cookie;
+
+ p_conn = p_intf->p_sys->p_conn;
+
+ p_msg = dbus_message_new_method_call( PM_SERVICE, PM_PATH, PM_INTERFACE,
+ "UnInhibit" );
+ if( !p_msg )
+ return VLC_FALSE;
+
+ dbus_message_iter_init_append( p_msg, &args );
+
+ i_cookie = p_intf->p_sys->i_cookie;
+ if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_UINT32, &i_cookie ) )
+ {
+ dbus_message_unref( p_msg );
+ return VLC_FALSE;
+ }
+
+ if( !dbus_connection_send( p_conn, p_msg, NULL ) )
+ return VLC_FALSE;
+ dbus_connection_flush( p_conn );
+
+ dbus_message_unref( p_msg );
+
+ return VLC_TRUE;
+}
+
+/*****************************************************************************
+ * Run: main thread
+ *****************************************************************************/
+static void Run( intf_thread_t *p_intf )
+{
+ for(;;)
+ {
+ input_thread_t *p_input;
+ vlc_bool_t b_quit;
+
+ /* Check playing state every 30 seconds */
+ vlc_object_lock( p_intf );
+ b_quit = vlc_object_timedwait( p_intf, mdate() + 30000000 ) < 0;
+ vlc_object_unlock( p_intf );
+
+ if( b_quit )
+ break;
+
+ p_input = vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_ANYWHERE );
+ if( p_input )
+ {
+ if( PLAYING_S == p_input->i_state && !p_intf->p_sys->i_cookie )
+ {
+ if( !Inhibit( p_intf ) )
+ {
+ vlc_object_release( p_input );
+ return;
+ }
+ }
+ else if( p_intf->p_sys->i_cookie )
+ {
+ if( !UnInhibit( p_intf ) )
+ {
+ vlc_object_release( p_input );
+ return;
+ }
+ }
+ vlc_object_release( p_input );
+ }
+ else if( p_intf->p_sys->i_cookie )
+ {
+ if( !UnInhibit( p_intf ) )
+ return;
+ }
+ }
+}
projects / vlc / commitdiff