inhibit.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:8k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * inhibit.c : prevents the computer from suspending when VLC is playing
- *****************************************************************************
- * Copyright © 2007 Rafaël Carré
- * $Id: 5e880bdd9452b87f9b3f3f346822f5fe77f2998d $
- *
- * 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
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_input.h>
- #include <vlc_interface.h>
- #include <vlc_playlist.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 );
- static int Inhibit( intf_thread_t *p_intf );
- static int UnInhibit( intf_thread_t *p_intf );
- struct intf_sys_t
- {
- DBusConnection *p_conn;
- dbus_uint32_t i_cookie;
- };
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- vlc_module_begin ()
- set_description( N_("Power Management Inhibitor") )
- 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;
- if( p_intf->p_sys->i_cookie )
- UnInhibit( p_intf );
- 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 false if Out of memory, else true
- *****************************************************************************/
- static int Inhibit( intf_thread_t *p_intf )
- {
- DBusConnection *p_conn;
- DBusMessage *p_msg;
- DBusMessageIter args;
- DBusMessage *p_reply;
- 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 false;
- dbus_message_iter_init_append( p_msg, &args );
- char *psz_app = strdup( PACKAGE );
- if( !psz_app ||
- !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING, &psz_app ) )
- {
- free( psz_app );
- dbus_message_unref( p_msg );
- return false;
- }
- free( psz_app );
- char *psz_inhibit_reason = strdup( _("Playing some media.") );
- if( !psz_inhibit_reason )
- {
- dbus_message_unref( p_msg );
- return false;
- }
- if( !dbus_message_iter_append_basic( &args, DBUS_TYPE_STRING,
- &psz_inhibit_reason ) )
- {
- free( psz_inhibit_reason );
- dbus_message_unref( p_msg );
- return false;
- }
- free( psz_inhibit_reason );
- p_reply = dbus_connection_send_with_reply_and_block( p_conn, p_msg,
- 50, NULL ); /* 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 true;
- }
- /* extract the cookie from the reply */
- if( dbus_message_get_args( p_reply, NULL,
- DBUS_TYPE_UINT32, &i_cookie,
- DBUS_TYPE_INVALID ) == FALSE )
- {
- return false;
- }
- /* Save the cookie */
- p_intf->p_sys->i_cookie = i_cookie;
- return true;
- }
- /*****************************************************************************
- * UnInhibit: Notify the power management daemon that we aren't active anymore
- *
- * returns false if Out of memory, else true
- *****************************************************************************/
- static int UnInhibit( intf_thread_t *p_intf )
- {
- DBusConnection *p_conn;
- DBusMessage *p_msg;
- DBusMessageIter args;
- 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 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 false;
- }
- if( !dbus_connection_send( p_conn, p_msg, NULL ) )
- return false;
- dbus_connection_flush( p_conn );
- dbus_message_unref( p_msg );
- p_intf->p_sys->i_cookie = 0;
- return true;
- }
- /*****************************************************************************
- * Run: main thread
- *****************************************************************************/
- static void vlc_cleanup_playlist( void *p_playlist )
- {
- pl_Release( (playlist_t*)p_playlist );
- }
- static void Run( intf_thread_t *p_intf )
- {
- int canc = vlc_savecancel();
- playlist_t *p_playlist = pl_Hold( p_intf );
- vlc_cleanup_push( vlc_cleanup_playlist, p_intf );
- for( ;; )
- {
- vlc_restorecancel( canc );
- /* FIXME wake up on playlist event instead ?
- * Check playing state every 30 seconds */
- msleep( 30 * CLOCK_FREQ );
- canc = vlc_savecancel();
- /* */
- input_thread_t *p_input = playlist_CurrentInput( p_playlist );
- if( p_input )
- {
- const int i_state = var_GetInteger( p_input, "state" );
- vlc_object_release( p_input );
- if( PLAYING_S == i_state )
- {
- if( !p_intf->p_sys->i_cookie )
- {
- if( !Inhibit( p_intf ) )
- break;
- }
- }
- else if( p_intf->p_sys->i_cookie )
- {
- if( !UnInhibit( p_intf ) )
- break;
- }
- }
- else if( p_intf->p_sys->i_cookie )
- {
- if( !UnInhibit( p_intf ) )
- break;
- }
- }
- /* */
- vlc_cleanup_run();
- vlc_restorecancel( canc );
- }