src/libvlc.c

   1 /*****************************************************************************
   2  * libvlc.c: libvlc instances creation and deletion, interfaces handling
   3  *****************************************************************************
   4  * Copyright (C) 1998-2008 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *          Gildas Bazin <gbazin@videolan.org>
  10  *          Derk-Jan Hartman <hartman at videolan dot org>
  11  *          Rémi Denis-Courmont <rem # videolan : org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU Lesser General Public License as published by
  15  * the Free Software Foundation; either version 2.1 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  21  * GNU Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public License
  24  * along with this program; if not, write to the Free Software Foundation,
  25  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27
  28 /** \file
  29  * This file contains functions to create and destroy libvlc instances
  30  */
  31
  32 /*****************************************************************************
  33  * Preamble
  34  *****************************************************************************/
  35 #ifdef HAVE_CONFIG_H
  36 # include "config.h"
  37 #endif
  38
  39 #include <vlc_common.h>
  40 #include "../lib/libvlc_internal.h"
  41 #include <vlc_input.h>
  42
  43 #include "modules/modules.h"
  44 #include "config/configuration.h"
  45 #include "playlist/preparser.h"
  46
  47 #include <stdio.h>                                              /* sprintf() */
  48 #include <string.h>
  49 #include <stdlib.h>                                                /* free() */
  50 #include <errno.h>
  51
  52 #include "config/vlc_getopt.h"
  53
  54 #ifdef HAVE_DBUS
  55 /* used for one-instance mode */
  56 #   include <dbus/dbus.h>
  57 #endif
  58
  59
  60 #include <vlc_playlist.h>
  61 #include <vlc_interface.h>
  62
  63 #include <vlc_charset.h>
  64 #include <vlc_fs.h>
  65 #include <vlc_cpu.h>
  66 #include <vlc_url.h>
  67 #include <vlc_modules.h>
  68
  69 #include "libvlc.h"
  70 #include "playlist/playlist_internal.h"
  71 #include "misc/variables.h"
  72
  73 #include <vlc_vlm.h>
  74
  75 #ifdef __APPLE__
  76 # include <libkern/OSAtomic.h>
  77 #endif
  78
  79 #include <assert.h>
  80
  81 /*****************************************************************************
  82  * Local prototypes
  83  *****************************************************************************/
  84 static void GetFilenames  ( libvlc_int_t *, unsigned, const char *const [] );
  85
  86 /**
  87  * Allocate a blank libvlc instance, also setting the exit handler.
  88  * Vlc's threading system must have been initialized first
  89  */
  90 libvlc_int_t * libvlc_InternalCreate( void )
  91 {
  92     libvlc_int_t *p_libvlc;
  93     libvlc_priv_t *priv;
  94
  95     /* Allocate a libvlc instance object */
  96     p_libvlc = vlc_custom_create( (vlc_object_t *)NULL, sizeof (*priv),
  97                                   "libvlc" );
  98     if( p_libvlc == NULL )
  99         return NULL;
 100
 101     priv = libvlc_priv (p_libvlc);
 102     priv->playlist = NULL;
 103     priv->p_dialog_provider = NULL;
 104     priv->p_vlm = NULL;
 105
 106     vlc_ExitInit( &priv->exit );
 107
 108     return p_libvlc;
 109 }
 110
 111 /**
 112  * Initialize a libvlc instance
 113  * This function initializes a previously allocated libvlc instance:
 114  *  - CPU detection
 115  *  - gettext initialization
 116  *  - message queue, module bank and playlist initialization
 117  *  - configuration and commandline parsing
 118  */
 119 int libvlc_InternalInit( libvlc_int_t *p_libvlc, int i_argc,
 120                          const char *ppsz_argv[] )
 121 {
 122     libvlc_priv_t *priv = libvlc_priv (p_libvlc);
 123     char *       psz_modules = NULL;
 124     char *       psz_parser = NULL;
 125     char *       psz_control = NULL;
 126     char        *psz_val;
 127
 128     /* System specific initialization code */
 129     system_Init();
 130
 131     /* Initialize the module bank and load the configuration of the
 132      * core module. We need to do this at this stage to be able to display
 133      * a short help if required by the user. (short help == core module
 134      * options) */
 135     module_InitBank ();
 136
 137     /* Get command line options that affect module loading. */
 138     if( config_LoadCmdLine( p_libvlc, i_argc, ppsz_argv, NULL ) )
 139     {
 140         module_EndBank (false);
 141         return VLC_EGENERIC;
 142     }
 143
 144     vlc_LogInit (p_libvlc);
 145     vlc_threads_setup (p_libvlc);
 146
 147     /* Load the builtins and plugins into the module_bank.
 148      * We have to do it before config_Load*() because this also gets the
 149      * list of configuration options exported by each module and loads their
 150      * default values. */
 151     size_t module_count = module_LoadPlugins (p_libvlc);
 152
 153     /*
 154      * Override default configuration with config file settings
 155      */
 156     if( !var_InheritBool( p_libvlc, "ignore-config" ) )
 157     {
 158         if( var_InheritBool( p_libvlc, "reset-config" ) )
 159             config_SaveConfigFile( p_libvlc ); /* Save default config */
 160         else
 161             config_LoadConfigFile( p_libvlc );
 162     }
 163
 164     /*
 165      * Override configuration with command line settings
 166      */
 167     int vlc_optind;
 168     if( config_LoadCmdLine( p_libvlc, i_argc, ppsz_argv, &vlc_optind ) )
 169     {
 170         module_EndBank (true);
 171         vlc_LogDeinit (p_libvlc);
 172         return VLC_EGENERIC;
 173     }
 174
 175     /*
 176      * Support for gettext
 177      */
 178 #if defined( ENABLE_NLS ) \
 179      && ( defined( HAVE_GETTEXT ) || defined( HAVE_INCLUDED_GETTEXT ) )
 180     vlc_bindtextdomain (PACKAGE_NAME);
 181 #endif
 182     /*xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"... */
 183     msg_Dbg( p_libvlc, "translation test: code is \"%s\"", _("C") );
 184
 185     if (config_PrintHelp (VLC_OBJECT(p_libvlc)))
 186     {
 187         module_EndBank (true);
 188         exit(0);
 189     }
 190
 191     if( module_count <= 1 )
 192     {
 193         msg_Err( p_libvlc, "No plugins found! Check your VLC installation.");
 194         module_EndBank (true);
 195         vlc_LogDeinit (p_libvlc);
 196         return VLC_ENOMOD;
 197     }
 198
 199 #ifdef HAVE_DAEMON
 200     /* Check for daemon mode */
 201     if( var_InheritBool( p_libvlc, "daemon" ) )
 202     {
 203         if( daemon( 1, 0) != 0 )
 204         {
 205             msg_Err( p_libvlc, "Unable to fork vlc to daemon mode" );
 206             module_EndBank (true);
 207             vlc_LogDeinit (p_libvlc);
 208             return VLC_ENOMEM;
 209         }
 210
 211         /* lets check if we need to write the pidfile */
 212         char *pidfile = var_InheritString( p_libvlc, "pidfile" );
 213         if( pidfile != NULL )
 214         {
 215             FILE *stream = vlc_fopen( pidfile, "w" );
 216             if( stream != NULL )
 217             {
 218                 fprintf( stream, "%d", (int)getpid() );
 219                 fclose( stream );
 220                 msg_Dbg( p_libvlc, "written PID file %s", pidfile );
 221             }
 222             else
 223                 msg_Err( p_libvlc, "cannot write PID file %s: %s",
 224                          pidfile, vlc_strerror_c(errno) );
 225             free( pidfile );
 226         }
 227     }
 228     else
 229     {
 230         var_Create( p_libvlc, "pidfile", VLC_VAR_STRING );
 231         var_SetString( p_libvlc, "pidfile", "" );
 232     }
 233 #endif
 234
 235 /* FIXME: could be replaced by using Unix sockets */
 236 #ifdef HAVE_DBUS
 237
 238 #define MPRIS_APPEND "/org/mpris/MediaPlayer2/TrackList/Append"
 239 #define MPRIS_BUS_NAME "org.mpris.MediaPlayer2.vlc"
 240 #define MPRIS_OBJECT_PATH "/org/mpris/MediaPlayer2"
 241 #define MPRIS_TRACKLIST_INTERFACE "org.mpris.MediaPlayer2.TrackList"
 242
 243     if( var_InheritBool( p_libvlc, "one-instance" )
 244     || ( var_InheritBool( p_libvlc, "one-instance-when-started-from-file" )
 245       && var_InheritBool( p_libvlc, "started-from-file" ) ) )
 246     {
 247         for( int i = vlc_optind; i < i_argc; i++ )
 248             if( ppsz_argv[i][0] == ':' )
 249             {
 250                 msg_Err( p_libvlc, "item option %s incompatible with single instance",
 251                          ppsz_argv[i] );
 252                 goto dbus_out;
 253             }
 254
 255         /* Initialise D-Bus interface, check for other instances */
 256         dbus_threads_init_default();
 257
 258         DBusError err;
 259         dbus_error_init( &err );
 260
 261         /* connect to the session bus */
 262         DBusConnection  *conn = dbus_bus_get( DBUS_BUS_SESSION, &err );
 263         if( conn == NULL )
 264         {
 265             msg_Err( p_libvlc, "Failed to connect to D-Bus session daemon: %s",
 266                     err.message );
 267             dbus_error_free( &err );
 268             goto dbus_out;
 269         }
 270
 271         /* check if VLC is available on the bus
 272          * if not: D-Bus control is not enabled on the other
 273          * instance and we can't pass MRLs to it */
 274         /* FIXME: This check is totally brain-dead and buggy. */
 275         if( !dbus_bus_name_has_owner( conn, MPRIS_BUS_NAME, &err ) )
 276         {
 277             dbus_connection_unref( conn );
 278             if( dbus_error_is_set( &err ) )
 279             {
 280                 msg_Err( p_libvlc, "D-Bus error: %s", err.message );
 281             }
 282             else
 283                 msg_Dbg( p_libvlc, "No media player running. Continuing normally." );
 284             dbus_error_free( &err );
 285             goto dbus_out;
 286         }
 287
 288         const dbus_bool_t play = !var_InheritBool( p_libvlc, "playlist-enqueue" );
 289
 290         msg_Warn( p_libvlc, "media player running. Exiting...");
 291         for( int i = vlc_optind; i < i_argc; i++ )
 292         {
 293             DBusMessage *msg = dbus_message_new_method_call(
 294                MPRIS_BUS_NAME, MPRIS_OBJECT_PATH, MPRIS_TRACKLIST_INTERFACE, "AddTrack" );
 295             if( unlikely(msg == NULL) )
 296                 continue;
 297
 298             /* We need to resolve relative paths in this instance */
 299             char *mrl;
 300             if( strstr( ppsz_argv[i], "://" ) )
 301                 mrl = strdup( ppsz_argv[i] );
 302             else
 303                 mrl = vlc_path2uri( ppsz_argv[i], NULL );
 304             if( mrl == NULL )
 305             {
 306                 dbus_message_unref( msg );
 307                 continue;
 308             }
 309
 310             const char *after_track = MPRIS_APPEND;
 311
 312             /* append MRLs */
 313             if( !dbus_message_append_args( msg, DBUS_TYPE_STRING, &mrl,
 314                                                 DBUS_TYPE_OBJECT_PATH, &after_track,
 315                                                 DBUS_TYPE_BOOLEAN, &play,
 316                                                 DBUS_TYPE_INVALID ) )
 317             {
 318                  dbus_message_unref( msg );
 319                  msg = NULL;
 320                  free( mrl );
 321                  continue;
 322             }
 323
 324             msg_Dbg( p_libvlc, "Adds %s to the running media player", mrl );
 325             free( mrl );
 326
 327             /* send message and get a handle for a reply */
 328             DBusMessage *reply = dbus_connection_send_with_reply_and_block( conn, msg, -1,
 329                                                                             &err );
 330             dbus_message_unref( msg );
 331             if( reply == NULL )
 332             {
 333                 msg_Err( p_libvlc, "D-Bus error: %s", err.message );
 334                 continue;
 335             }
 336             dbus_message_unref( reply );
 337         }
 338         /* we unreference the connection when we've finished with it */
 339         dbus_connection_unref( conn );
 340         exit( 1 );
 341     }
 342 #undef MPRIS_APPEND
 343 #undef MPRIS_BUS_NAME
 344 #undef MPRIS_OBJECT_PATH
 345 #undef MPRIS_TRACKLIST_INTERFACE
 346 dbus_out:
 347 #endif // HAVE_DBUS
 348
 349     vlc_CPU_dump( VLC_OBJECT(p_libvlc) );
 350
 351     priv->b_stats = var_InheritBool( p_libvlc, "stats" );
 352
 353     /*
 354      * Initialize hotkey handling
 355      */
 356     priv->actions = vlc_InitActions( p_libvlc );
 357
 358     /*
 359      * Meta data handling
 360      */
 361     priv->parser = playlist_preparser_New(VLC_OBJECT(p_libvlc));
 362
 363     /* Create a variable for showing the fullscreen interface */
 364     var_Create( p_libvlc, "intf-toggle-fscontrol", VLC_VAR_BOOL );
 365     var_SetBool( p_libvlc, "intf-toggle-fscontrol", true );
 366
 367     /* Create a variable for the Boss Key */
 368     var_Create( p_libvlc, "intf-boss", VLC_VAR_VOID );
 369
 370     /* Create a variable for showing the main interface */
 371     var_Create( p_libvlc, "intf-show", VLC_VAR_BOOL );
 372
 373     /* Create a variable for showing the right click menu */
 374     var_Create( p_libvlc, "intf-popupmenu", VLC_VAR_BOOL );
 375
 376     /* variables for signalling creation of new files */
 377     var_Create( p_libvlc, "snapshot-file", VLC_VAR_STRING );
 378     var_Create( p_libvlc, "record-file", VLC_VAR_STRING );
 379
 380     /* some default internal settings */
 381     var_Create( p_libvlc, "window", VLC_VAR_STRING );
 382     /* NOTE: Because the playlist and interfaces start before this function
 383      * returns control to the application (DESIGN BUG!), all these variables
 384      * must be created (in place of libvlc_new()) and set to VLC defaults
 385      * (in place of VLC main()) *here*. */
 386     var_Create( p_libvlc, "user-agent", VLC_VAR_STRING );
 387     var_SetString( p_libvlc, "user-agent",
 388                    "VLC media player (LibVLC "VERSION")" );
 389     var_Create( p_libvlc, "http-user-agent", VLC_VAR_STRING );
 390     var_SetString( p_libvlc, "http-user-agent",
 391                    "VLC/"PACKAGE_VERSION" LibVLC/"PACKAGE_VERSION );
 392     var_Create( p_libvlc, "app-icon-name", VLC_VAR_STRING );
 393     var_SetString( p_libvlc, "app-icon-name", PACKAGE_NAME );
 394     var_Create( p_libvlc, "app-id", VLC_VAR_STRING );
 395     var_SetString( p_libvlc, "app-id", "org.VideoLAN.VLC" );
 396     var_Create( p_libvlc, "app-version", VLC_VAR_STRING );
 397     var_SetString( p_libvlc, "app-version", PACKAGE_VERSION );
 398
 399     /* System specific configuration */
 400     system_Configure( p_libvlc, i_argc - vlc_optind, ppsz_argv + vlc_optind );
 401
 402 #ifdef ENABLE_VLM
 403     /* Initialize VLM if vlm-conf is specified */
 404     psz_parser = var_CreateGetNonEmptyString( p_libvlc, "vlm-conf" );
 405     if( psz_parser )
 406     {
 407         priv->p_vlm = vlm_New( p_libvlc );
 408         if( !priv->p_vlm )
 409             msg_Err( p_libvlc, "VLM initialization failed" );
 410     }
 411     free( psz_parser );
 412 #endif
 413
 414     /*
 415      * Load background interfaces
 416      */
 417     psz_modules = var_CreateGetNonEmptyString( p_libvlc, "extraintf" );
 418     psz_control = var_CreateGetNonEmptyString( p_libvlc, "control" );
 419
 420     if( psz_modules && psz_control )
 421     {
 422         char* psz_tmp;
 423         if( asprintf( &psz_tmp, "%s:%s", psz_modules, psz_control ) != -1 )
 424         {
 425             free( psz_modules );
 426             psz_modules = psz_tmp;
 427         }
 428     }
 429     else if( psz_control )
 430     {
 431         free( psz_modules );
 432         psz_modules = strdup( psz_control );
 433     }
 434
 435     psz_parser = psz_modules;
 436     while ( psz_parser && *psz_parser )
 437     {
 438         char *psz_module, *psz_temp;
 439         psz_module = psz_parser;
 440         psz_parser = strchr( psz_module, ':' );
 441         if ( psz_parser )
 442         {
 443             *psz_parser = '\0';
 444             psz_parser++;
 445         }
 446         if( asprintf( &psz_temp, "%s,none", psz_module ) != -1)
 447         {
 448             libvlc_InternalAddIntf( p_libvlc, psz_temp );
 449             free( psz_temp );
 450         }
 451     }
 452     free( psz_modules );
 453     free( psz_control );
 454
 455 #ifdef HAVE_SYSLOG_H
 456     if( var_InheritBool( p_libvlc, "syslog" ) )
 457     {
 458         char *logmode = var_CreateGetNonEmptyString( p_libvlc, "logmode" );
 459         var_SetString( p_libvlc, "logmode", "syslog" );
 460         libvlc_InternalAddIntf( p_libvlc, "logger,none" );
 461
 462         if( logmode )
 463         {
 464             var_SetString( p_libvlc, "logmode", logmode );
 465             free( logmode );
 466         }
 467         var_Destroy( p_libvlc, "logmode" );
 468     }
 469     else
 470 #endif
 471     if( var_InheritBool( p_libvlc, "file-logging" ) )
 472         libvlc_InternalAddIntf( p_libvlc, "logger,none" );
 473
 474     if( var_InheritBool( p_libvlc, "network-synchronisation") )
 475         libvlc_InternalAddIntf( p_libvlc, "netsync,none" );
 476
 477 #ifdef __APPLE__
 478     var_Create( p_libvlc, "drawable-view-top", VLC_VAR_INTEGER );
 479     var_Create( p_libvlc, "drawable-view-left", VLC_VAR_INTEGER );
 480     var_Create( p_libvlc, "drawable-view-bottom", VLC_VAR_INTEGER );
 481     var_Create( p_libvlc, "drawable-view-right", VLC_VAR_INTEGER );
 482     var_Create( p_libvlc, "drawable-clip-top", VLC_VAR_INTEGER );
 483     var_Create( p_libvlc, "drawable-clip-left", VLC_VAR_INTEGER );
 484     var_Create( p_libvlc, "drawable-clip-bottom", VLC_VAR_INTEGER );
 485     var_Create( p_libvlc, "drawable-clip-right", VLC_VAR_INTEGER );
 486     var_Create( p_libvlc, "drawable-nsobject", VLC_VAR_ADDRESS );
 487 #endif
 488 #if defined (_WIN32) || defined (__OS2__)
 489     var_Create( p_libvlc, "drawable-hwnd", VLC_VAR_INTEGER );
 490 #endif
 491
 492     /*
 493      * Get input filenames given as commandline arguments.
 494      * We assume that the remaining parameters are filenames
 495      * and their input options.
 496      */
 497     GetFilenames( p_libvlc, i_argc - vlc_optind, ppsz_argv + vlc_optind );
 498
 499     /*
 500      * Get --open argument
 501      */
 502     psz_val = var_InheritString( p_libvlc, "open" );
 503     if ( psz_val != NULL )
 504     {
 505         intf_InsertItem( p_libvlc, psz_val, 0, NULL, 0 );
 506         free( psz_val );
 507     }
 508
 509     return VLC_SUCCESS;
 510 }
 511
 512 /**
 513  * Cleanup a libvlc instance. The instance is not completely deallocated
 514  * \param p_libvlc the instance to clean
 515  */
 516 void libvlc_InternalCleanup( libvlc_int_t *p_libvlc )
 517 {
 518     libvlc_priv_t *priv = libvlc_priv (p_libvlc);
 519
 520     /* Ask the interfaces to stop and destroy them */
 521     msg_Dbg( p_libvlc, "removing all interfaces" );
 522     libvlc_Quit( p_libvlc );
 523     intf_DestroyAll( p_libvlc );
 524
 525 #ifdef ENABLE_VLM
 526     /* Destroy VLM if created in libvlc_InternalInit */
 527     if( priv->p_vlm )
 528     {
 529         vlm_Delete( priv->p_vlm );
 530     }
 531 #endif
 532
 533 #if !defined( _WIN32 ) && !defined( __OS2__ )
 534     char *pidfile = var_InheritString( p_libvlc, "pidfile" );
 535     if( pidfile != NULL )
 536     {
 537         msg_Dbg( p_libvlc, "removing PID file %s", pidfile );
 538         if( unlink( pidfile ) )
 539             msg_Warn( p_libvlc, "cannot remove PID file %s: %s",
 540                       pidfile, vlc_strerror_c(errno) );
 541         free( pidfile );
 542     }
 543 #endif
 544
 545     if (priv->parser != NULL)
 546         playlist_preparser_Delete(priv->parser);
 547
 548     vlc_DeinitActions( p_libvlc, priv->actions );
 549
 550     /* Save the configuration */
 551     if( !var_InheritBool( p_libvlc, "ignore-config" ) )
 552         config_AutoSaveConfigFile( VLC_OBJECT(p_libvlc) );
 553
 554     /* Free module bank. It is refcounted, so we call this each time  */
 555     module_EndBank (true);
 556     vlc_LogDeinit (p_libvlc);
 557 #if defined(_WIN32) || defined(__OS2__)
 558     system_End( );
 559 #endif
 560 }
 561
 562 /**
 563  * Destroy everything.
 564  * This function requests the running threads to finish, waits for their
 565  * termination, and destroys their structure.
 566  * It stops the thread systems: no instance can run after this has run
 567  * \param p_libvlc the instance to destroy
 568  */
 569 void libvlc_InternalDestroy( libvlc_int_t *p_libvlc )
 570 {
 571     libvlc_priv_t *priv = libvlc_priv( p_libvlc );
 572
 573     vlc_ExitDestroy( &priv->exit );
 574
 575     assert( atomic_load(&(vlc_internals(p_libvlc)->refs)) == 1 );
 576     vlc_object_release( p_libvlc );
 577 }
 578
 579 /*****************************************************************************
 580  * GetFilenames: parse command line options which are not flags
 581  *****************************************************************************
 582  * Parse command line for input files as well as their associated options.
 583  * An option always follows its associated input and begins with a ":".
 584  *****************************************************************************/
 585 static void GetFilenames( libvlc_int_t *p_vlc, unsigned n,
 586                           const char *const args[] )
 587 {
 588     while( n > 0 )
 589     {
 590         /* Count the input options */
 591         unsigned i_options = 0;
 592
 593         while( args[--n][0] == ':' )
 594         {
 595             i_options++;
 596             if( n == 0 )
 597             {
 598                 msg_Warn( p_vlc, "options %s without item", args[n] );
 599                 return; /* syntax!? */
 600             }
 601         }
 602
 603         char *mrl = NULL;
 604         if( strstr( args[n], "://" ) == NULL )
 605         {
 606             mrl = vlc_path2uri( args[n], NULL );
 607             if( !mrl )
 608                 continue;
 609         }
 610
 611         intf_InsertItem( p_vlc, (mrl != NULL) ? mrl : args[n], i_options,
 612                          ( i_options ? &args[n + 1] : NULL ),
 613                          VLC_INPUT_OPTION_TRUSTED );
 614         free( mrl );
 615     }
 616 }
 617
 618 /**
 619  * Requests extraction of the meta data for an input item (a.k.a. preparsing).
 620  * The actual extraction is asynchronous.
 621  */
 622 int libvlc_MetaRequest(libvlc_int_t *libvlc, input_item_t *item,
 623                        input_item_meta_request_option_t i_options)
 624 {
 625     libvlc_priv_t *priv = libvlc_priv(libvlc);
 626
 627     if (unlikely(priv->parser == NULL))
 628         return VLC_ENOMEM;
 629
 630     playlist_preparser_Push(priv->parser, item, i_options);
 631     return VLC_SUCCESS;
 632 }
 633
 634 /**
 635  * Requests retrieving/downloading art for an input item.
 636  * The retrieval is performed asynchronously.
 637  */
 638 int libvlc_ArtRequest(libvlc_int_t *libvlc, input_item_t *item,
 639                       input_item_meta_request_option_t i_options)
 640 {
 641     libvlc_priv_t *priv = libvlc_priv(libvlc);
 642
 643     if (unlikely(priv->parser == NULL))
 644         return VLC_ENOMEM;
 645
 646     playlist_preparser_fetcher_Push(priv->parser, item, i_options);
 647     return VLC_SUCCESS;
 648 }