dbus.c
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上传日期:2020-07-06
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文件大小:38k
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midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * dbus.c : D-Bus control interface
- *****************************************************************************
- * Copyright © 2006-2008 Rafaël Carré
- * Copyright © 2007-2008 Mirsal Ennaime
- * Copyright © 2009 The VideoLAN team
- * $Id: 5704672cce3ce0f8e326c4bbbd40adbbf10ccf50 $
- *
- * Authors: Rafaël Carré <funman at videolanorg>
- * Mirsal Ennaime <mirsal dot ennaime at gmail dot com>
- *
- * 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.
- *****************************************************************************/
- /*
- * D-Bus Specification:
- * http://dbus.freedesktop.org/doc/dbus-specification.html
- * D-Bus low-level C API (libdbus)
- * http://dbus.freedesktop.org/doc/dbus/api/html/index.html
- * extract:
- * "If you use this low-level API directly, you're signing up for some pain."
- *
- * MPRIS Specification version 1.0
- * http://wiki.xmms2.xmms.se/index.php/MPRIS
- */
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <dbus/dbus.h>
- #include "dbus.h"
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_aout.h>
- #include <vlc_interface.h>
- #include <vlc_playlist.h>
- #include <math.h>
- #include <assert.h>
- /*****************************************************************************
- * Local prototypes.
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- static void Run ( intf_thread_t * );
- static int StateChange( intf_thread_t *, int );
- static int TrackChange( intf_thread_t * );
- static int StatusChangeEmit( intf_thread_t *);
- static int TrackListChangeEmit( intf_thread_t *, int, int );
- static int AllCallback( vlc_object_t*, const char*, vlc_value_t, vlc_value_t, void* );
- static int GetInputMeta ( input_item_t *, DBusMessageIter * );
- static int MarshalStatus ( intf_thread_t *, DBusMessageIter * );
- static int UpdateCaps( intf_thread_t* );
- /* GetCaps() capabilities */
- enum
- {
- CAPS_NONE = 0,
- CAPS_CAN_GO_NEXT = 1 << 0,
- CAPS_CAN_GO_PREV = 1 << 1,
- CAPS_CAN_PAUSE = 1 << 2,
- CAPS_CAN_PLAY = 1 << 3,
- CAPS_CAN_SEEK = 1 << 4,
- CAPS_CAN_PROVIDE_METADATA = 1 << 5,
- CAPS_CAN_HAS_TRACKLIST = 1 << 6
- };
- // The signal that can be get from the callbacks
- enum
- {
- SIGNAL_ITEM_CURRENT,
- SIGNAL_INTF_CHANGE,
- SIGNAL_PLAYLIST_ITEM_APPEND,
- SIGNAL_PLAYLIST_ITEM_DELETED,
- SIGNAL_RANDOM,
- SIGNAL_REPEAT,
- SIGNAL_LOOP,
- SIGNAL_STATE
- };
- struct intf_sys_t
- {
- DBusConnection *p_conn;
- bool b_meta_read;
- dbus_int32_t i_caps;
- bool b_dead;
- vlc_array_t *p_events;
- vlc_mutex_t lock;
- };
- typedef struct
- {
- int signal;
- int i_node;
- int i_input_state;
- } callback_info_t;
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- vlc_module_begin ()
- set_shortname( N_("dbus"))
- set_category( CAT_INTERFACE )
- set_subcategory( SUBCAT_INTERFACE_CONTROL )
- set_description( N_("D-Bus control interface") )
- set_capability( "interface", 0 )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /*****************************************************************************
- * Methods
- *****************************************************************************/
- /* Player */
- DBUS_METHOD( Quit )
- { /* exits vlc */
- REPLY_INIT;
- libvlc_Quit(((vlc_object_t*)p_this)->p_libvlc);
- REPLY_SEND;
- }
- DBUS_METHOD( MprisVersion )
- { /*implemented version of the mpris spec */
- REPLY_INIT;
- OUT_ARGUMENTS;
- VLC_UNUSED( p_this );
- dbus_uint16_t i_major = VLC_MPRIS_VERSION_MAJOR;
- dbus_uint16_t i_minor = VLC_MPRIS_VERSION_MINOR;
- DBusMessageIter version;
- if( !dbus_message_iter_open_container( &args, DBUS_TYPE_STRUCT, NULL,
- &version ) )
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
- if( !dbus_message_iter_append_basic( &version, DBUS_TYPE_UINT16,
- &i_major ) )
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
- if( !dbus_message_iter_append_basic( &version, DBUS_TYPE_UINT16,
- &i_minor ) )
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
- if( !dbus_message_iter_close_container( &args, &version ) )
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
- REPLY_SEND;
- }
- DBUS_METHOD( PositionGet )
- { /* returns position in milliseconds */
- REPLY_INIT;
- OUT_ARGUMENTS;
- vlc_value_t position;
- dbus_int32_t i_pos;
- playlist_t *p_playlist = pl_Hold( ((vlc_object_t*) p_this) );
- input_thread_t *p_input = playlist_CurrentInput( p_playlist );
- if( !p_input )
- i_pos = 0;
- else
- {
- var_Get( p_input, "time", &position );
- i_pos = position.i_time / 1000;
- vlc_object_release( p_input );
- }
- pl_Release( ((vlc_object_t*) p_this) );
- ADD_INT32( &i_pos );
- REPLY_SEND;
- }
- DBUS_METHOD( PositionSet )
- { /* set position in milliseconds */
- REPLY_INIT;
- vlc_value_t position;
- playlist_t* p_playlist = NULL;
- dbus_int32_t i_pos;
- DBusError error;
- dbus_error_init( &error );
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_INT32, &i_pos,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( ((vlc_object_t*) p_this) );
- input_thread_t *p_input = playlist_CurrentInput( p_playlist );
- if( p_input )
- {
- position.i_time = ((mtime_t)i_pos) * 1000;
- var_Set( p_input, "time", position );
- vlc_object_release( p_input );
- }
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- DBUS_METHOD( VolumeGet )
- { /* returns volume in percentage */
- REPLY_INIT;
- OUT_ARGUMENTS;
- dbus_int32_t i_dbus_vol;
- audio_volume_t i_vol;
- /* 2nd argument of aout_VolumeGet is int32 */
- aout_VolumeGet( (vlc_object_t*) p_this, &i_vol );
- double f_vol = 100. * i_vol / AOUT_VOLUME_MAX;
- i_dbus_vol = round( f_vol );
- ADD_INT32( &i_dbus_vol );
- REPLY_SEND;
- }
- DBUS_METHOD( VolumeSet )
- { /* set volume in percentage */
- REPLY_INIT;
- DBusError error;
- dbus_error_init( &error );
- dbus_int32_t i_dbus_vol;
- audio_volume_t i_vol;
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_INT32, &i_dbus_vol,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- double f_vol = AOUT_VOLUME_MAX * i_dbus_vol / 100.;
- i_vol = round( f_vol );
- aout_VolumeSet( (vlc_object_t*) p_this, i_vol );
- REPLY_SEND;
- }
- DBUS_METHOD( Next )
- { /* next playlist item */
- REPLY_INIT;
- playlist_t *p_playlist = pl_Hold( ((vlc_object_t*) p_this) );
- playlist_Next( p_playlist );
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- DBUS_METHOD( Prev )
- { /* previous playlist item */
- REPLY_INIT;
- playlist_t *p_playlist = pl_Hold( ((vlc_object_t*) p_this) );
- playlist_Prev( p_playlist );
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- DBUS_METHOD( Stop )
- { /* stop playing */
- REPLY_INIT;
- playlist_t *p_playlist = pl_Hold( ((vlc_object_t*) p_this) );
- playlist_Stop( p_playlist );
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- DBUS_METHOD( GetStatus )
- { /* returns the current status as a struct of 4 ints */
- /*
- First 0 = Playing, 1 = Paused, 2 = Stopped.
- Second 0 = Playing linearly , 1 = Playing randomly.
- Third 0 = Go to the next element once the current has finished playing , 1 = Repeat the current element
- Fourth 0 = Stop playing once the last element has been played, 1 = Never give up playing *
- */
- REPLY_INIT;
- OUT_ARGUMENTS;
- MarshalStatus( p_this, &args );
- REPLY_SEND;
- }
- DBUS_METHOD( Pause )
- {
- REPLY_INIT;
- playlist_t *p_playlist = pl_Hold( (vlc_object_t*) p_this );
- playlist_Pause( p_playlist );
- pl_Release( (vlc_object_t*) p_this );
- REPLY_SEND;
- }
- DBUS_METHOD( Play )
- {
- REPLY_INIT;
- playlist_t *p_playlist = pl_Hold( (vlc_object_t*) p_this );
- input_thread_t *p_input = playlist_CurrentInput( p_playlist );
- if( p_input )
- {
- double i_pos = 0;
- input_Control( p_input, INPUT_SET_POSITION, i_pos );
- vlc_object_release( p_input );
- }
- else
- playlist_Play( p_playlist );
- pl_Release( (vlc_object_t*) p_this );
- REPLY_SEND;
- }
- DBUS_METHOD( GetCurrentMetadata )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- playlist_t* p_playlist = pl_Hold( (vlc_object_t*) p_this );
- PL_LOCK;
- playlist_item_t* p_item = playlist_CurrentPlayingItem( p_playlist );
- if( p_item )
- GetInputMeta( p_item->p_input, &args );
- PL_UNLOCK;
- pl_Release( (vlc_object_t*) p_this );
- REPLY_SEND;
- }
- DBUS_METHOD( GetCaps )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- ADD_INT32( &((intf_thread_t*)p_this)->p_sys->i_caps );
- REPLY_SEND;
- }
- /* Media Player information */
- DBUS_METHOD( Identity )
- {
- VLC_UNUSED(p_this);
- REPLY_INIT;
- OUT_ARGUMENTS;
- char *psz_identity;
- if( asprintf( &psz_identity, "%s %s", PACKAGE, VERSION ) != -1 )
- {
- ADD_STRING( &psz_identity );
- free( psz_identity );
- }
- else
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
- REPLY_SEND;
- }
- /* TrackList */
- DBUS_METHOD( AddTrack )
- { /* add the string to the playlist, and play it if the boolean is true */
- REPLY_INIT;
- OUT_ARGUMENTS;
- DBusError error;
- dbus_error_init( &error );
- playlist_t* p_playlist = NULL;
- char *psz_mrl;
- dbus_bool_t b_play;
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_STRING, &psz_mrl,
- DBUS_TYPE_BOOLEAN, &b_play,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( (vlc_object_t*) p_this );
- playlist_Add( p_playlist, psz_mrl, NULL, PLAYLIST_APPEND |
- ( ( b_play == TRUE ) ? PLAYLIST_GO : 0 ) ,
- PLAYLIST_END, true, false );
- pl_Release( (vlc_object_t*) p_this );
- dbus_int32_t i_success = 0;
- ADD_INT32( &i_success );
- REPLY_SEND;
- }
- DBUS_METHOD( GetCurrentTrack )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- playlist_t *p_playlist = pl_Hold( (vlc_object_t*) p_this );
- dbus_int32_t i_position = p_playlist->i_current_index;
- pl_Release( (vlc_object_t*) p_this );
- ADD_INT32( &i_position );
- REPLY_SEND;
- }
- DBUS_METHOD( GetMetadata )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- DBusError error;
- dbus_error_init( &error );
- dbus_int32_t i_position;
- playlist_t *p_playlist;
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_INT32, &i_position,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( (vlc_object_t*) p_this );
- PL_LOCK;
- if( i_position < p_playlist->current.i_size )
- {
- GetInputMeta( p_playlist->current.p_elems[i_position]->p_input, &args );
- }
- PL_UNLOCK;
- pl_Release( (vlc_object_t*) p_this );
- REPLY_SEND;
- }
- DBUS_METHOD( GetLength )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- playlist_t *p_playlist = pl_Hold( (vlc_object_t*) p_this );
- dbus_int32_t i_elements = p_playlist->current.i_size;
- pl_Release( (vlc_object_t*) p_this );
- ADD_INT32( &i_elements );
- REPLY_SEND;
- }
- DBUS_METHOD( DelTrack )
- {
- REPLY_INIT;
- DBusError error;
- dbus_error_init( &error );
- dbus_int32_t i_position;
- playlist_t *p_playlist;
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_INT32, &i_position,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( (vlc_object_t*) p_this );
- PL_LOCK;
- if( i_position < p_playlist->current.i_size )
- {
- playlist_DeleteFromInput( p_playlist,
- p_playlist->current.p_elems[i_position]->p_input->i_id,
- pl_Locked );
- }
- PL_UNLOCK;
- pl_Release( (vlc_object_t*) p_this );
- REPLY_SEND;
- }
- DBUS_METHOD( SetLoop )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- DBusError error;
- dbus_bool_t b_loop;
- playlist_t* p_playlist;
- dbus_error_init( &error );
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_BOOLEAN, &b_loop,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( (vlc_object_t*) p_this );
- var_SetBool( p_playlist, "loop", ( b_loop == TRUE ) );
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- DBUS_METHOD( Repeat )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- DBusError error;
- dbus_bool_t b_repeat;
- playlist_t* p_playlist;
- dbus_error_init( &error );
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_BOOLEAN, &b_repeat,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( (vlc_object_t*) p_this );
- var_SetBool( p_playlist, "repeat", ( b_repeat == TRUE ) );
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- DBUS_METHOD( SetRandom )
- {
- REPLY_INIT;
- OUT_ARGUMENTS;
- DBusError error;
- dbus_bool_t b_random;
- playlist_t* p_playlist;
- dbus_error_init( &error );
- dbus_message_get_args( p_from, &error,
- DBUS_TYPE_BOOLEAN, &b_random,
- DBUS_TYPE_INVALID );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( (vlc_object_t*) p_this, "D-Bus message reading : %s",
- error.message );
- dbus_error_free( &error );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- p_playlist = pl_Hold( (vlc_object_t*) p_this );
- var_SetBool( p_playlist, "random", ( b_random == TRUE ) );
- pl_Release( ((vlc_object_t*) p_this) );
- REPLY_SEND;
- }
- /*****************************************************************************
- * Introspection method
- *****************************************************************************/
- DBUS_METHOD( handle_introspect_root )
- { /* handles introspection of root object */
- VLC_UNUSED(p_this);
- REPLY_INIT;
- OUT_ARGUMENTS;
- ADD_STRING( &psz_introspection_xml_data_root );
- REPLY_SEND;
- }
- DBUS_METHOD( handle_introspect_player )
- {
- VLC_UNUSED(p_this);
- REPLY_INIT;
- OUT_ARGUMENTS;
- ADD_STRING( &psz_introspection_xml_data_player );
- REPLY_SEND;
- }
- DBUS_METHOD( handle_introspect_tracklist )
- {
- VLC_UNUSED(p_this);
- REPLY_INIT;
- OUT_ARGUMENTS;
- ADD_STRING( &psz_introspection_xml_data_tracklist );
- REPLY_SEND;
- }
- /*****************************************************************************
- * handle_*: answer to incoming messages
- *****************************************************************************/
- #define METHOD_FUNC( method, function )
- else if( dbus_message_is_method_call( p_from, MPRIS_DBUS_INTERFACE, method ) )
- return function( p_conn, p_from, p_this )
- DBUS_METHOD( handle_root )
- {
- if( dbus_message_is_method_call( p_from,
- DBUS_INTERFACE_INTROSPECTABLE, "Introspect" ) )
- return handle_introspect_root( p_conn, p_from, p_this );
- /* here D-Bus method's names are associated to an handler */
- METHOD_FUNC( "Identity", Identity );
- METHOD_FUNC( "MprisVersion", MprisVersion );
- METHOD_FUNC( "Quit", Quit );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- DBUS_METHOD( handle_player )
- {
- if( dbus_message_is_method_call( p_from,
- DBUS_INTERFACE_INTROSPECTABLE, "Introspect" ) )
- return handle_introspect_player( p_conn, p_from, p_this );
- /* here D-Bus method's names are associated to an handler */
- METHOD_FUNC( "Prev", Prev );
- METHOD_FUNC( "Next", Next );
- METHOD_FUNC( "Stop", Stop );
- METHOD_FUNC( "Play", Play );
- METHOD_FUNC( "Pause", Pause );
- METHOD_FUNC( "Repeat", Repeat );
- METHOD_FUNC( "VolumeSet", VolumeSet );
- METHOD_FUNC( "VolumeGet", VolumeGet );
- METHOD_FUNC( "PositionSet", PositionSet );
- METHOD_FUNC( "PositionGet", PositionGet );
- METHOD_FUNC( "GetStatus", GetStatus );
- METHOD_FUNC( "GetMetadata", GetCurrentMetadata );
- METHOD_FUNC( "GetCaps", GetCaps );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- DBUS_METHOD( handle_tracklist )
- {
- if( dbus_message_is_method_call( p_from,
- DBUS_INTERFACE_INTROSPECTABLE, "Introspect" ) )
- return handle_introspect_tracklist( p_conn, p_from, p_this );
- /* here D-Bus method's names are associated to an handler */
- METHOD_FUNC( "GetMetadata", GetMetadata );
- METHOD_FUNC( "GetCurrentTrack", GetCurrentTrack );
- METHOD_FUNC( "GetLength", GetLength );
- METHOD_FUNC( "AddTrack", AddTrack );
- METHOD_FUNC( "DelTrack", DelTrack );
- METHOD_FUNC( "SetLoop", SetLoop );
- METHOD_FUNC( "SetRandom", SetRandom );
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
- /*****************************************************************************
- * Open: initialize interface
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- { /* initialisation of the connection */
- intf_thread_t *p_intf = (intf_thread_t*)p_this;
- intf_sys_t *p_sys = malloc( sizeof( intf_sys_t ) );
- playlist_t *p_playlist;
- DBusConnection *p_conn;
- DBusError error;
- if( !p_sys )
- return VLC_ENOMEM;
- p_sys->b_meta_read = false;
- p_sys->i_caps = CAPS_NONE;
- p_sys->b_dead = false;
- dbus_error_init( &error );
- /* connect to the session bus */
- p_conn = dbus_bus_get( DBUS_BUS_SESSION, &error );
- if( !p_conn )
- {
- msg_Err( p_this, "Failed to connect to the D-Bus session daemon: %s",
- error.message );
- dbus_error_free( &error );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* register a well-known name on the bus */
- dbus_bus_request_name( p_conn, VLC_MPRIS_DBUS_SERVICE, 0, &error );
- if( dbus_error_is_set( &error ) )
- {
- msg_Err( p_this, "Error requesting service " VLC_MPRIS_DBUS_SERVICE
- ": %s", error.message );
- dbus_error_free( &error );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* we register the objects */
- dbus_connection_register_object_path( p_conn, MPRIS_DBUS_ROOT_PATH,
- &vlc_dbus_root_vtable, p_this );
- dbus_connection_register_object_path( p_conn, MPRIS_DBUS_PLAYER_PATH,
- &vlc_dbus_player_vtable, p_this );
- dbus_connection_register_object_path( p_conn, MPRIS_DBUS_TRACKLIST_PATH,
- &vlc_dbus_tracklist_vtable, p_this );
- dbus_connection_flush( p_conn );
- p_intf->pf_run = Run;
- p_intf->p_sys = p_sys;
- p_sys->p_conn = p_conn;
- p_sys->p_events = vlc_array_new();
- vlc_mutex_init( &p_sys->lock );
- p_playlist = pl_Hold( p_intf );
- PL_LOCK;
- var_AddCallback( p_playlist, "item-current", AllCallback, p_intf );
- var_AddCallback( p_playlist, "intf-change", AllCallback, p_intf );
- var_AddCallback( p_playlist, "playlist-item-append", AllCallback, p_intf );
- var_AddCallback( p_playlist, "playlist-item-deleted", AllCallback, p_intf );
- var_AddCallback( p_playlist, "random", AllCallback, p_intf );
- var_AddCallback( p_playlist, "repeat", AllCallback, p_intf );
- var_AddCallback( p_playlist, "loop", AllCallback, p_intf );
- PL_UNLOCK;
- pl_Release( p_intf );
- UpdateCaps( p_intf );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close: destroy interface
- *****************************************************************************/
- static void Close ( vlc_object_t *p_this )
- {
- intf_thread_t *p_intf = (intf_thread_t*) p_this;
- playlist_t *p_playlist = pl_Hold( p_intf );;
- input_thread_t *p_input;
- var_DelCallback( p_playlist, "item-current", AllCallback, p_intf );
- var_DelCallback( p_playlist, "intf-change", AllCallback, p_intf );
- var_DelCallback( p_playlist, "playlist-item-append", AllCallback, p_intf );
- var_DelCallback( p_playlist, "playlist-item-deleted", AllCallback, p_intf );
- var_DelCallback( p_playlist, "random", AllCallback, p_intf );
- var_DelCallback( p_playlist, "repeat", AllCallback, p_intf );
- var_DelCallback( p_playlist, "loop", AllCallback, p_intf );
- p_input = playlist_CurrentInput( p_playlist );
- if ( p_input )
- {
- var_DelCallback( p_input, "state", AllCallback, p_intf );
- vlc_object_release( p_input );
- }
- pl_Release( p_intf );
- dbus_connection_unref( p_intf->p_sys->p_conn );
- // Free the events array
- for( int i = 0; i < vlc_array_count( p_intf->p_sys->p_events ); i++ )
- {
- callback_info_t* info = vlc_array_item_at_index( p_intf->p_sys->p_events, i );
- free( info );
- }
- vlc_mutex_destroy( &p_intf->p_sys->lock );
- vlc_array_destroy( p_intf->p_sys->p_events );
- free( p_intf->p_sys );
- }
- /*****************************************************************************
- * Run: main loop
- *****************************************************************************/
- static void Run ( intf_thread_t *p_intf )
- {
- for( ;; )
- {
- msleep( INTF_IDLE_SLEEP );
- int canc = vlc_savecancel();
- dbus_connection_read_write_dispatch( p_intf->p_sys->p_conn, 0 );
- /* Get the list of events to process
- *
- * We can't keep the lock on p_intf->p_sys->p_events, else we risk a
- * deadlock:
- * The signal functions could lock mutex X while p_events is locked;
- * While some other function in vlc (playlist) might lock mutex X
- * and then set a variable which would call AllCallback(), which itself
- * needs to lock p_events to add a new event.
- */
- vlc_mutex_lock( &p_intf->p_sys->lock );
- int i_events = vlc_array_count( p_intf->p_sys->p_events );
- callback_info_t* info[i_events];
- for( int i = i_events - 1; i >= 0; i-- )
- {
- info[i] = vlc_array_item_at_index( p_intf->p_sys->p_events, i );
- vlc_array_remove( p_intf->p_sys->p_events, i );
- }
- vlc_mutex_unlock( &p_intf->p_sys->lock );
- for( int i = 0; i < i_events; i++ )
- {
- switch( info[i]->signal )
- {
- case SIGNAL_ITEM_CURRENT:
- TrackChange( p_intf );
- break;
- case SIGNAL_INTF_CHANGE:
- case SIGNAL_PLAYLIST_ITEM_APPEND:
- case SIGNAL_PLAYLIST_ITEM_DELETED:
- TrackListChangeEmit( p_intf, info[i]->signal, info[i]->i_node );
- break;
- case SIGNAL_RANDOM:
- case SIGNAL_REPEAT:
- case SIGNAL_LOOP:
- StatusChangeEmit( p_intf );
- break;
- case SIGNAL_STATE:
- StateChange( p_intf, info[i]->i_input_state );
- break;
- default:
- assert(0);
- }
- free( info[i] );
- }
- vlc_restorecancel( canc );
- }
- }
- // Get all the callbacks
- static int AllCallback( vlc_object_t *p_this, const char *psz_var,
- vlc_value_t oldval, vlc_value_t newval, void *p_data )
- {
- (void)p_this;
- (void)oldval;
- intf_thread_t *p_intf = (intf_thread_t*)p_data;
- callback_info_t *info = malloc( sizeof( callback_info_t ) );
- if( !info )
- return VLC_ENOMEM;
- // Wich event is it ?
- if( !strcmp( "item-current", psz_var ) )
- info->signal = SIGNAL_ITEM_CURRENT;
- else if( !strcmp( "intf-change", psz_var ) )
- info->signal = SIGNAL_INTF_CHANGE;
- else if( !strcmp( "playlist-item-append", psz_var ) )
- {
- info->signal = SIGNAL_PLAYLIST_ITEM_APPEND;
- info->i_node = ((playlist_add_t*)newval.p_address)->i_node;
- }
- else if( !strcmp( "playlist-item-deleted", psz_var ) )
- info->signal = SIGNAL_PLAYLIST_ITEM_DELETED;
- else if( !strcmp( "random", psz_var ) )
- info->signal = SIGNAL_RANDOM;
- else if( !strcmp( "repeat", psz_var ) )
- info->signal = SIGNAL_REPEAT;
- else if( !strcmp( "loop", psz_var ) )
- info->signal = SIGNAL_LOOP;
- else if( !strcmp( "state", psz_var ) )
- {
- info->signal = SIGNAL_STATE;
- info->i_input_state = newval.i_int;
- }
- else
- assert(0);
- // Append the event
- vlc_mutex_lock( &p_intf->p_sys->lock );
- vlc_array_append( p_intf->p_sys->p_events, info );
- vlc_mutex_unlock( &p_intf->p_sys->lock );
- return VLC_SUCCESS;
- }
- /******************************************************************************
- * CapsChange: player capabilities change signal
- *****************************************************************************/
- DBUS_SIGNAL( CapsChangeSignal )
- {
- SIGNAL_INIT( "CapsChange" );
- OUT_ARGUMENTS;
- ADD_INT32( &((intf_thread_t*)p_data)->p_sys->i_caps );
- SIGNAL_SEND;
- }
- /******************************************************************************
- * TrackListChange: tracklist order / length change signal
- *****************************************************************************/
- DBUS_SIGNAL( TrackListChangeSignal )
- { /* emit the new tracklist lengh */
- SIGNAL_INIT("TrackListChange");
- OUT_ARGUMENTS;
- playlist_t *p_playlist = pl_Hold( (vlc_object_t*) p_data );
- dbus_int32_t i_elements = p_playlist->current.i_size;
- pl_Release( (vlc_object_t*) p_data );
- ADD_INT32( &i_elements );
- SIGNAL_SEND;
- }
- /*****************************************************************************
- * TrackListChangeEmit: Emits the TrackListChange signal
- *****************************************************************************/
- /* FIXME: It is not called on tracklist reordering */
- static int TrackListChangeEmit( intf_thread_t *p_intf, int signal, int i_node )
- {
- // "playlist-item-append"
- if( signal == SIGNAL_PLAYLIST_ITEM_APPEND )
- {
- /* don't signal when items are added/removed in p_category */
- playlist_t *p_playlist = pl_Hold( p_intf );
- PL_LOCK;
- playlist_item_t *p_item = playlist_ItemGetById( p_playlist, i_node );
- assert( p_item );
- while( p_item->p_parent )
- p_item = p_item->p_parent;
- if( p_item == p_playlist->p_root_category )
- {
- PL_UNLOCK;
- pl_Release( p_intf );
- return VLC_SUCCESS;
- }
- PL_UNLOCK;
- pl_Release( p_intf );
- }
- if( p_intf->p_sys->b_dead )
- return VLC_SUCCESS;
- UpdateCaps( p_intf );
- TrackListChangeSignal( p_intf->p_sys->p_conn, p_intf );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * TrackChange: Playlist item change callback
- *****************************************************************************/
- DBUS_SIGNAL( TrackChangeSignal )
- { /* emit the metadata of the new item */
- SIGNAL_INIT( "TrackChange" );
- OUT_ARGUMENTS;
- input_item_t *p_item = (input_item_t*) p_data;
- GetInputMeta ( p_item, &args );
- SIGNAL_SEND;
- }
- /*****************************************************************************
- * StatusChange: Player status change signal
- *****************************************************************************/
- DBUS_SIGNAL( StatusChangeSignal )
- { /* send the updated status info on the bus */
- SIGNAL_INIT( "StatusChange" );
- OUT_ARGUMENTS;
- /* we're called from a callback of input_thread_t, so it can not be
- * destroyed before we return */
- MarshalStatus( (intf_thread_t*) p_data, &args );
- SIGNAL_SEND;
- }
- /*****************************************************************************
- * StateChange: callback on input "state"
- *****************************************************************************/
- //static int StateChange( vlc_object_t *p_this, const char* psz_var,
- // vlc_value_t oldval, vlc_value_t newval, void *p_data )
- static int StateChange( intf_thread_t *p_intf, int i_input_state )
- {
- intf_sys_t *p_sys = p_intf->p_sys;
- playlist_t *p_playlist;
- input_thread_t *p_input;
- input_item_t *p_item;
- if( p_intf->p_sys->b_dead )
- return VLC_SUCCESS;
- UpdateCaps( p_intf );
- if( !p_sys->b_meta_read && i_input_state == PLAYING_S )
- {
- p_playlist = pl_Hold( p_intf );
- p_input = playlist_CurrentInput( p_playlist );
- if( p_input )
- {
- p_item = input_GetItem( p_input );
- if( p_item )
- {
- p_sys->b_meta_read = true;
- TrackChangeSignal( p_sys->p_conn, p_item );
- }
- vlc_object_release( p_input );
- }
- pl_Release( p_intf );
- }
- if( i_input_state == PLAYING_S || i_input_state == PAUSE_S ||
- i_input_state == END_S )
- {
- StatusChangeSignal( p_sys->p_conn, p_intf );
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * StatusChangeEmit: Emits the StatusChange signal
- *****************************************************************************/
- static int StatusChangeEmit( intf_thread_t * p_intf )
- {
- if( p_intf->p_sys->b_dead )
- return VLC_SUCCESS;
- UpdateCaps( p_intf );
- StatusChangeSignal( p_intf->p_sys->p_conn, p_intf );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * TrackChange: callback on playlist "item-current"
- *****************************************************************************/
- static int TrackChange( intf_thread_t *p_intf )
- {
- intf_sys_t *p_sys = p_intf->p_sys;
- playlist_t *p_playlist;
- input_thread_t *p_input = NULL;
- input_item_t *p_item = NULL;
- if( p_intf->p_sys->b_dead )
- return VLC_SUCCESS;
- p_sys->b_meta_read = false;
- p_playlist = pl_Hold( p_intf );
- p_input = playlist_CurrentInput( p_playlist );
- if( !p_input )
- {
- pl_Release( p_intf );
- return VLC_SUCCESS;
- }
- pl_Release( p_intf );
- p_item = input_GetItem( p_input );
- if( !p_item )
- {
- vlc_object_release( p_input );
- return VLC_EGENERIC;
- }
- if( input_item_IsPreparsed( p_item ) )
- {
- p_sys->b_meta_read = true;
- TrackChangeSignal( p_sys->p_conn, p_item );
- }
- var_AddCallback( p_input, "state", AllCallback, p_intf );
- vlc_object_release( p_input );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * UpdateCaps: update p_sys->i_caps
- * This function have to be called with the playlist unlocked
- ****************************************************************************/
- static int UpdateCaps( intf_thread_t* p_intf )
- {
- intf_sys_t* p_sys = p_intf->p_sys;
- dbus_int32_t i_caps = CAPS_CAN_HAS_TRACKLIST;
- playlist_t* p_playlist = pl_Hold( p_intf );
- PL_LOCK;
- if( p_playlist->current.i_size > 0 )
- i_caps |= CAPS_CAN_PLAY | CAPS_CAN_GO_PREV | CAPS_CAN_GO_NEXT;
- PL_UNLOCK;
- input_thread_t* p_input = playlist_CurrentInput( p_playlist );
- if( p_input )
- {
- /* XXX: if UpdateCaps() is called too early, these are
- * unconditionnaly true */
- if( var_GetBool( p_input, "can-pause" ) )
- i_caps |= CAPS_CAN_PAUSE;
- if( var_GetBool( p_input, "can-seek" ) )
- i_caps |= CAPS_CAN_SEEK;
- vlc_object_release( p_input );
- }
- pl_Release( p_intf );
- if( p_sys->b_meta_read )
- i_caps |= CAPS_CAN_PROVIDE_METADATA;
- if( i_caps != p_intf->p_sys->i_caps )
- {
- p_sys->i_caps = i_caps;
- CapsChangeSignal( p_intf->p_sys->p_conn, (vlc_object_t*)p_intf );
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * GetInputMeta: Fill a DBusMessage with the given input item metadata
- *****************************************************************************/
- #define ADD_META( entry, type, data )
- if( data ) {
- dbus_message_iter_open_container( &dict, DBUS_TYPE_DICT_ENTRY,
- NULL, &dict_entry );
- dbus_message_iter_append_basic( &dict_entry, DBUS_TYPE_STRING,
- &ppsz_meta_items[entry] );
- dbus_message_iter_open_container( &dict_entry, DBUS_TYPE_VARIANT,
- type##_AS_STRING, &variant );
- dbus_message_iter_append_basic( &variant,
- type,
- & data );
- dbus_message_iter_close_container( &dict_entry, &variant );
- dbus_message_iter_close_container( &dict, &dict_entry ); }
- #define ADD_VLC_META_STRING( entry, item )
- {
- char * psz = input_item_Get##item( p_input );
- ADD_META( entry, DBUS_TYPE_STRING,
- psz );
- free( psz );
- }
- static int GetInputMeta( input_item_t* p_input,
- DBusMessageIter *args )
- {
- DBusMessageIter dict, dict_entry, variant;
- /* We need the track length to be expressed in milli-seconds
- * instead of µ-seconds */
- dbus_int64_t i_length = ( input_item_GetDuration( p_input ) / 1000 );
- const char* ppsz_meta_items[] =
- {
- "title", "artist", "genre", "copyright", "album", "tracknum",
- "description", "rating", "date", "setting", "url", "language",
- "nowplaying", "publisher", "encodedby", "arturl", "trackid",
- "status", "location", "length", "video-codec", "audio-codec",
- "video-bitrate", "audio-bitrate", "audio-samplerate"
- };
- dbus_message_iter_open_container( args, DBUS_TYPE_ARRAY, "{sv}", &dict );
- ADD_VLC_META_STRING( 0, Title );
- ADD_VLC_META_STRING( 1, Artist );
- ADD_VLC_META_STRING( 2, Genre );
- ADD_VLC_META_STRING( 3, Copyright );
- ADD_VLC_META_STRING( 4, Album );
- ADD_VLC_META_STRING( 5, TrackNum );
- ADD_VLC_META_STRING( 6, Description );
- ADD_VLC_META_STRING( 7, Rating );
- ADD_VLC_META_STRING( 8, Date );
- ADD_VLC_META_STRING( 9, Setting );
- ADD_VLC_META_STRING( 10, URL );
- ADD_VLC_META_STRING( 11, Language );
- ADD_VLC_META_STRING( 12, NowPlaying );
- ADD_VLC_META_STRING( 13, Publisher );
- ADD_VLC_META_STRING( 14, EncodedBy );
- ADD_VLC_META_STRING( 15, ArtURL );
- ADD_VLC_META_STRING( 16, TrackID );
- vlc_mutex_lock( &p_input->lock );
- if( p_input->p_meta )
- ADD_META( 17, DBUS_TYPE_INT32, p_input->p_meta->i_status );
- vlc_mutex_unlock( &p_input->lock );
- ADD_VLC_META_STRING( 18, URI );
- ADD_META( 19, DBUS_TYPE_INT64, i_length );
- dbus_message_iter_close_container( args, &dict );
- return VLC_SUCCESS;
- }
- #undef ADD_META
- #undef ADD_VLC_META_STRING
- /*****************************************************************************
- * MarshalStatus: Fill a DBusMessage with the current player status
- *****************************************************************************/
- static int MarshalStatus( intf_thread_t* p_intf, DBusMessageIter* args )
- { /* This is NOT the right way to do that, it would be better to sore
- the status information in p_sys and update it on change, thus
- avoiding a long lock */
- DBusMessageIter status;
- dbus_int32_t i_state, i_random, i_repeat, i_loop;
- vlc_value_t val;
- playlist_t* p_playlist = NULL;
- input_thread_t* p_input = NULL;
- p_playlist = pl_Hold( p_intf );
- i_state = 2;
- p_input = playlist_CurrentInput( p_playlist );
- if( p_input )
- {
- var_Get( p_input, "state", &val );
- if( val.i_int >= END_S )
- i_state = 2;
- else if( val.i_int == PAUSE_S )
- i_state = 1;
- else if( val.i_int <= PLAYING_S )
- i_state = 0;
- vlc_object_release( p_input );
- }
- i_random = var_CreateGetBool( p_playlist, "random" );
- i_repeat = var_CreateGetBool( p_playlist, "repeat" );
- i_loop = var_CreateGetBool( p_playlist, "loop" );
- pl_Release( p_intf );
- dbus_message_iter_open_container( args, DBUS_TYPE_STRUCT, NULL, &status );
- dbus_message_iter_append_basic( &status, DBUS_TYPE_INT32, &i_state );
- dbus_message_iter_append_basic( &status, DBUS_TYPE_INT32, &i_random );
- dbus_message_iter_append_basic( &status, DBUS_TYPE_INT32, &i_repeat );
- dbus_message_iter_append_basic( &status, DBUS_TYPE_INT32, &i_loop );
- dbus_message_iter_close_container( args, &status );
- return VLC_SUCCESS;
- }